f51667685749e (Theodore Ts'o 2017-12-17 22:00:59 -0500 1) // SPDX-License-Identifier: GPL-2.0+
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2) /*
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 3) * linux/fs/jbd2/journal.c
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 4) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 5) * Written by Stephen C. Tweedie <sct@redhat.com>, 1998
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 6) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 7) * Copyright 1998 Red Hat corp --- All Rights Reserved
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 8) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 9) * Generic filesystem journal-writing code; part of the ext2fs
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 10) * journaling system.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 11) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 12) * This file manages journals: areas of disk reserved for logging
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 13) * transactional updates. This includes the kernel journaling thread
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 14) * which is responsible for scheduling updates to the log.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 15) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 16) * We do not actually manage the physical storage of the journal in this
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 17) * file: that is left to a per-journal policy function, which allows us
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 18) * to store the journal within a filesystem-specified area for ext2
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 19) * journaling (ext2 can use a reserved inode for storing the log).
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 20) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 21)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 22) #include <linux/module.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 23) #include <linux/time.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 24) #include <linux/fs.h>
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 25) #include <linux/jbd2.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 26) #include <linux/errno.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 27) #include <linux/slab.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 28) #include <linux/init.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 29) #include <linux/mm.h>
7dfb71030f763 (Nigel Cunningham 2006-12-06 20:34:23 -0800 30) #include <linux/freezer.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 31) #include <linux/pagemap.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 32) #include <linux/kthread.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 33) #include <linux/poison.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 34) #include <linux/proc_fs.h>
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 35) #include <linux/seq_file.h>
c225aa57ff4ff (Simon Holm Thøgersen 2009-01-11 22:34:01 -0500 36) #include <linux/math64.h>
879c5e6b7cb4c (Theodore Ts'o 2009-06-17 11:47:48 -0400 37) #include <linux/hash.h>
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 38) #include <linux/log2.h>
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 39) #include <linux/vmalloc.h>
47def82672b3b (Theodore Ts'o 2010-07-27 11:56:05 -0400 40) #include <linux/backing-dev.h>
39e3ac2599a5f (Brian King 2010-10-27 21:25:12 -0400 41) #include <linux/bitops.h>
670be5a78ac7c (Theodore Ts'o 2010-12-17 10:44:16 -0500 42) #include <linux/ratelimit.h>
eb52da3f48f5b (Michal Hocko 2017-05-03 14:53:26 -0700 43) #include <linux/sched/mm.h>
879c5e6b7cb4c (Theodore Ts'o 2009-06-17 11:47:48 -0400 44)
879c5e6b7cb4c (Theodore Ts'o 2009-06-17 11:47:48 -0400 45) #define CREATE_TRACE_POINTS
879c5e6b7cb4c (Theodore Ts'o 2009-06-17 11:47:48 -0400 46) #include <trace/events/jbd2.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 47)
7c0f6ba682b9c (Linus Torvalds 2016-12-24 11:46:01 -0800 48) #include <linux/uaccess.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 49) #include <asm/page.h>
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 50)
b6e96d0067d81 (Theodore Ts'o 2013-02-09 16:29:20 -0500 51) #ifdef CONFIG_JBD2_DEBUG
b6e96d0067d81 (Theodore Ts'o 2013-02-09 16:29:20 -0500 52) ushort jbd2_journal_enable_debug __read_mostly;
b6e96d0067d81 (Theodore Ts'o 2013-02-09 16:29:20 -0500 53) EXPORT_SYMBOL(jbd2_journal_enable_debug);
b6e96d0067d81 (Theodore Ts'o 2013-02-09 16:29:20 -0500 54)
b6e96d0067d81 (Theodore Ts'o 2013-02-09 16:29:20 -0500 55) module_param_named(jbd2_debug, jbd2_journal_enable_debug, ushort, 0644);
b6e96d0067d81 (Theodore Ts'o 2013-02-09 16:29:20 -0500 56) MODULE_PARM_DESC(jbd2_debug, "Debugging level for jbd2");
b6e96d0067d81 (Theodore Ts'o 2013-02-09 16:29:20 -0500 57) #endif
b6e96d0067d81 (Theodore Ts'o 2013-02-09 16:29:20 -0500 58)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 59) EXPORT_SYMBOL(jbd2_journal_extend);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 60) EXPORT_SYMBOL(jbd2_journal_stop);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 61) EXPORT_SYMBOL(jbd2_journal_lock_updates);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 62) EXPORT_SYMBOL(jbd2_journal_unlock_updates);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 63) EXPORT_SYMBOL(jbd2_journal_get_write_access);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 64) EXPORT_SYMBOL(jbd2_journal_get_create_access);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 65) EXPORT_SYMBOL(jbd2_journal_get_undo_access);
e06c8227fd94e (Joel Becker 2008-09-11 15:35:47 -0700 66) EXPORT_SYMBOL(jbd2_journal_set_triggers);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 67) EXPORT_SYMBOL(jbd2_journal_dirty_metadata);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 68) EXPORT_SYMBOL(jbd2_journal_forget);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 69) EXPORT_SYMBOL(jbd2_journal_flush);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 70) EXPORT_SYMBOL(jbd2_journal_revoke);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 71)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 72) EXPORT_SYMBOL(jbd2_journal_init_dev);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 73) EXPORT_SYMBOL(jbd2_journal_init_inode);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 74) EXPORT_SYMBOL(jbd2_journal_check_used_features);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 75) EXPORT_SYMBOL(jbd2_journal_check_available_features);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 76) EXPORT_SYMBOL(jbd2_journal_set_features);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 77) EXPORT_SYMBOL(jbd2_journal_load);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 78) EXPORT_SYMBOL(jbd2_journal_destroy);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 79) EXPORT_SYMBOL(jbd2_journal_abort);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 80) EXPORT_SYMBOL(jbd2_journal_errno);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 81) EXPORT_SYMBOL(jbd2_journal_ack_err);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 82) EXPORT_SYMBOL(jbd2_journal_clear_err);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 83) EXPORT_SYMBOL(jbd2_log_wait_commit);
3b799d15f2622 (Theodore Ts'o 2009-12-09 20:42:53 -0500 84) EXPORT_SYMBOL(jbd2_log_start_commit);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 85) EXPORT_SYMBOL(jbd2_journal_start_commit);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 86) EXPORT_SYMBOL(jbd2_journal_force_commit_nested);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 87) EXPORT_SYMBOL(jbd2_journal_wipe);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 88) EXPORT_SYMBOL(jbd2_journal_blocks_per_page);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 89) EXPORT_SYMBOL(jbd2_journal_invalidatepage);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 90) EXPORT_SYMBOL(jbd2_journal_try_to_free_buffers);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 91) EXPORT_SYMBOL(jbd2_journal_force_commit);
6ba0e7dc64a5a (Ross Zwisler 2019-06-20 17:24:56 -0400 92) EXPORT_SYMBOL(jbd2_journal_inode_ranged_write);
6ba0e7dc64a5a (Ross Zwisler 2019-06-20 17:24:56 -0400 93) EXPORT_SYMBOL(jbd2_journal_inode_ranged_wait);
aa3c0c61f62d6 (Mauricio Faria de Oliveira 2020-10-05 21:48:38 -0300 94) EXPORT_SYMBOL(jbd2_journal_submit_inode_data_buffers);
aa3c0c61f62d6 (Mauricio Faria de Oliveira 2020-10-05 21:48:38 -0300 95) EXPORT_SYMBOL(jbd2_journal_finish_inode_data_buffers);
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 96) EXPORT_SYMBOL(jbd2_journal_init_jbd_inode);
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 97) EXPORT_SYMBOL(jbd2_journal_release_jbd_inode);
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 98) EXPORT_SYMBOL(jbd2_journal_begin_ordered_truncate);
8aefcd557d26d (Theodore Ts'o 2011-01-10 12:29:43 -0500 99) EXPORT_SYMBOL(jbd2_inode_cache);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 100)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 101) static int jbd2_journal_create_slab(size_t slab_size);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 102)
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 103) #ifdef CONFIG_JBD2_DEBUG
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 104) void __jbd2_debug(int level, const char *file, const char *func,
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 105) unsigned int line, const char *fmt, ...)
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 106) {
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 107) struct va_format vaf;
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 108) va_list args;
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 109)
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 110) if (level > jbd2_journal_enable_debug)
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 111) return;
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 112) va_start(args, fmt);
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 113) vaf.fmt = fmt;
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 114) vaf.va = &args;
9196f57151ffe (Wang Shilong 2018-05-20 22:14:29 -0400 115) printk(KERN_DEBUG "%s: (%s, %u): %pV", file, func, line, &vaf);
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 116) va_end(args);
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 117) }
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 118) EXPORT_SYMBOL(__jbd2_debug);
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 119) #endif
169f1a2a87aae (Paul Gortmaker 2013-06-12 23:04:04 -0400 120)
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 121) /* Checksumming functions */
7747e6d028b89 (Rashika Kheria 2014-02-17 20:49:04 -0500 122) static int jbd2_verify_csum_type(journal_t *j, journal_superblock_t *sb)
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 123) {
8595798ca34d1 (Darrick J. Wong 2015-10-15 10:30:36 -0400 124) if (!jbd2_journal_has_csum_v2or3_feature(j))
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 125) return 1;
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 126)
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 127) return sb->s_checksum_type == JBD2_CRC32C_CHKSUM;
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 128) }
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 129)
18a6ea1e5cc88 (Darrick J. Wong 2013-08-28 14:59:58 -0400 130) static __be32 jbd2_superblock_csum(journal_t *j, journal_superblock_t *sb)
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 131) {
18a6ea1e5cc88 (Darrick J. Wong 2013-08-28 14:59:58 -0400 132) __u32 csum;
18a6ea1e5cc88 (Darrick J. Wong 2013-08-28 14:59:58 -0400 133) __be32 old_csum;
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 134)
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 135) old_csum = sb->s_checksum;
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 136) sb->s_checksum = 0;
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 137) csum = jbd2_chksum(j, ~0, (char *)sb, sizeof(journal_superblock_t));
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 138) sb->s_checksum = old_csum;
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 139)
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 140) return cpu_to_be32(csum);
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 141) }
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 142)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 143) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 144) * Helper function used to manage commit timeouts
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 145) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 146)
e3c957885e428 (Kees Cook 2017-10-18 12:40:28 -0400 147) static void commit_timeout(struct timer_list *t)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 148) {
e3c957885e428 (Kees Cook 2017-10-18 12:40:28 -0400 149) journal_t *journal = from_timer(journal, t, j_commit_timer);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 150)
e3c957885e428 (Kees Cook 2017-10-18 12:40:28 -0400 151) wake_up_process(journal->j_task);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 152) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 153)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 154) /*
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 155) * kjournald2: The main thread function used to manage a logging device
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 156) * journal.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 157) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 158) * This kernel thread is responsible for two things:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 159) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 160) * 1) COMMIT: Every so often we need to commit the current state of the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 161) * filesystem to disk. The journal thread is responsible for writing
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 162) * all of the metadata buffers to disk. If a fast commit is ongoing
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 163) * journal thread waits until it's done and then continues from
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 164) * there on.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 165) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 166) * 2) CHECKPOINT: We cannot reuse a used section of the log file until all
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 167) * of the data in that part of the log has been rewritten elsewhere on
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 168) * the disk. Flushing these old buffers to reclaim space in the log is
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 169) * known as checkpointing, and this thread is responsible for that job.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 170) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 171)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 172) static int kjournald2(void *arg)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 173) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 174) journal_t *journal = arg;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 175) transaction_t *transaction;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 176)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 177) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 178) * Set up an interval timer which can be used to trigger a commit wakeup
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 179) * after the commit interval expires
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 180) */
e3c957885e428 (Kees Cook 2017-10-18 12:40:28 -0400 181) timer_setup(&journal->j_commit_timer, commit_timeout, 0);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 182)
35c80422afc83 (Nigel Cunningham 2012-02-03 19:59:41 +1100 183) set_freezable();
35c80422afc83 (Nigel Cunningham 2012-02-03 19:59:41 +1100 184)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 185) /* Record that the journal thread is running */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 186) journal->j_task = current;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 187) wake_up(&journal->j_wait_done_commit);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 188)
eb52da3f48f5b (Michal Hocko 2017-05-03 14:53:26 -0700 189) /*
eb52da3f48f5b (Michal Hocko 2017-05-03 14:53:26 -0700 190) * Make sure that no allocations from this kernel thread will ever
eb52da3f48f5b (Michal Hocko 2017-05-03 14:53:26 -0700 191) * recurse to the fs layer because we are responsible for the
eb52da3f48f5b (Michal Hocko 2017-05-03 14:53:26 -0700 192) * transaction commit and any fs involvement might get stuck waiting for
eb52da3f48f5b (Michal Hocko 2017-05-03 14:53:26 -0700 193) * the trasn. commit.
eb52da3f48f5b (Michal Hocko 2017-05-03 14:53:26 -0700 194) */
eb52da3f48f5b (Michal Hocko 2017-05-03 14:53:26 -0700 195) memalloc_nofs_save();
eb52da3f48f5b (Michal Hocko 2017-05-03 14:53:26 -0700 196)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 197) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 198) * And now, wait forever for commit wakeup events.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 199) */
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 200) write_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 201)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 202) loop:
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 203) if (journal->j_flags & JBD2_UNMOUNT)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 204) goto end_loop;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 205)
7821ce417ec73 (Gaowei Pu 2019-05-30 15:08:34 -0400 206) jbd_debug(1, "commit_sequence=%u, commit_request=%u\n",
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 207) journal->j_commit_sequence, journal->j_commit_request);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 208)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 209) if (journal->j_commit_sequence != journal->j_commit_request) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 210) jbd_debug(1, "OK, requests differ\n");
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 211) write_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 212) del_timer_sync(&journal->j_commit_timer);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 213) jbd2_journal_commit_transaction(journal);
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 214) write_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 215) goto loop;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 216) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 217)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 218) wake_up(&journal->j_wait_done_commit);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 219) if (freezing(current)) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 220) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 221) * The simpler the better. Flushing journal isn't a
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 222) * good idea, because that depends on threads that may
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 223) * be already stopped.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 224) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 225) jbd_debug(1, "Now suspending kjournald2\n");
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 226) write_unlock(&journal->j_state_lock);
a0acae0e886d4 (Tejun Heo 2011-11-21 12:32:22 -0800 227) try_to_freeze();
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 228) write_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 229) } else {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 230) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 231) * We assume on resume that commits are already there,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 232) * so we don't sleep
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 233) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 234) DEFINE_WAIT(wait);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 235) int should_sleep = 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 236)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 237) prepare_to_wait(&journal->j_wait_commit, &wait,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 238) TASK_INTERRUPTIBLE);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 239) if (journal->j_commit_sequence != journal->j_commit_request)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 240) should_sleep = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 241) transaction = journal->j_running_transaction;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 242) if (transaction && time_after_eq(jiffies,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 243) transaction->t_expires))
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 244) should_sleep = 0;
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 245) if (journal->j_flags & JBD2_UNMOUNT)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 246) should_sleep = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 247) if (should_sleep) {
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 248) write_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 249) schedule();
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 250) write_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 251) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 252) finish_wait(&journal->j_wait_commit, &wait);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 253) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 254)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 255) jbd_debug(1, "kjournald2 wakes\n");
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 256)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 257) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 258) * Were we woken up by a commit wakeup event?
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 259) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 260) transaction = journal->j_running_transaction;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 261) if (transaction && time_after_eq(jiffies, transaction->t_expires)) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 262) journal->j_commit_request = transaction->t_tid;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 263) jbd_debug(1, "woke because of timeout\n");
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 264) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 265) goto loop;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 266)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 267) end_loop:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 268) del_timer_sync(&journal->j_commit_timer);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 269) journal->j_task = NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 270) wake_up(&journal->j_wait_done_commit);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 271) jbd_debug(1, "Journal thread exiting.\n");
dbfcef6b0f401 (Sahitya Tummala 2017-02-01 20:49:35 -0500 272) write_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 273) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 274) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 275)
97f067846786d (Pavel Emelianov 2007-05-08 00:30:42 -0700 276) static int jbd2_journal_start_thread(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 277) {
97f067846786d (Pavel Emelianov 2007-05-08 00:30:42 -0700 278) struct task_struct *t;
97f067846786d (Pavel Emelianov 2007-05-08 00:30:42 -0700 279)
90576c0b9a0b5 (Theodore Ts'o 2009-09-29 15:51:30 -0400 280) t = kthread_run(kjournald2, journal, "jbd2/%s",
90576c0b9a0b5 (Theodore Ts'o 2009-09-29 15:51:30 -0400 281) journal->j_devname);
97f067846786d (Pavel Emelianov 2007-05-08 00:30:42 -0700 282) if (IS_ERR(t))
97f067846786d (Pavel Emelianov 2007-05-08 00:30:42 -0700 283) return PTR_ERR(t);
97f067846786d (Pavel Emelianov 2007-05-08 00:30:42 -0700 284)
1076d17ac70d1 (Al Viro 2008-03-29 03:07:18 +0000 285) wait_event(journal->j_wait_done_commit, journal->j_task != NULL);
97f067846786d (Pavel Emelianov 2007-05-08 00:30:42 -0700 286) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 287) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 288)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 289) static void journal_kill_thread(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 290) {
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 291) write_lock(&journal->j_state_lock);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 292) journal->j_flags |= JBD2_UNMOUNT;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 293)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 294) while (journal->j_task) {
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 295) write_unlock(&journal->j_state_lock);
3469a32a1e948 (Theodore Ts'o 2014-03-08 19:11:36 -0500 296) wake_up(&journal->j_wait_commit);
1076d17ac70d1 (Al Viro 2008-03-29 03:07:18 +0000 297) wait_event(journal->j_wait_done_commit, journal->j_task == NULL);
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 298) write_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 299) }
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 300) write_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 301) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 302)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 303) /*
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 304) * jbd2_journal_write_metadata_buffer: write a metadata buffer to the journal.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 305) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 306) * Writes a metadata buffer to a given disk block. The actual IO is not
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 307) * performed but a new buffer_head is constructed which labels the data
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 308) * to be written with the correct destination disk block.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 309) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 310) * Any magic-number escaping which needs to be done will cause a
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 311) * copy-out here. If the buffer happens to start with the
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 312) * JBD2_MAGIC_NUMBER, then we can't write it to the log directly: the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 313) * magic number is only written to the log for descripter blocks. In
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 314) * this case, we copy the data and replace the first word with 0, and we
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 315) * return a result code which indicates that this buffer needs to be
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 316) * marked as an escaped buffer in the corresponding log descriptor
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 317) * block. The missing word can then be restored when the block is read
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 318) * during recovery.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 319) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 320) * If the source buffer has already been modified by a new transaction
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 321) * since we took the last commit snapshot, we use the frozen copy of
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 322) * that data for IO. If we end up using the existing buffer_head's data
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 323) * for the write, then we have to make sure nobody modifies it while the
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 324) * IO is in progress. do_get_write_access() handles this.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 325) *
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 326) * The function returns a pointer to the buffer_head to be used for IO.
7821ce417ec73 (Gaowei Pu 2019-05-30 15:08:34 -0400 327) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 328) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 329) * Return value:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 330) * <0: Error
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 331) * >=0: Finished OK
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 332) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 333) * On success:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 334) * Bit 0 set == escape performed on the data
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 335) * Bit 1 set == buffer copy-out performed (kfree the data after IO)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 336) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 337)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 338) int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 339) struct journal_head *jh_in,
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 340) struct buffer_head **bh_out,
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 341) sector_t blocknr)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 342) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 343) int need_copy_out = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 344) int done_copy_out = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 345) int do_escape = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 346) char *mapped_data;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 347) struct buffer_head *new_bh;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 348) struct page *new_page;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 349) unsigned int new_offset;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 350) struct buffer_head *bh_in = jh2bh(jh_in);
96577c4382769 (dingdinghua 2009-07-13 17:55:35 -0400 351) journal_t *journal = transaction->t_journal;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 352)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 353) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 354) * The buffer really shouldn't be locked: only the current committing
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 355) * transaction is allowed to write it, so nobody else is allowed
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 356) * to do any IO.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 357) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 358) * akpm: except if we're journalling data, and write() output is
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 359) * also part of a shared mapping, and another thread has
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 360) * decided to launch a writepage() against this buffer.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 361) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 362) J_ASSERT_BH(bh_in, buffer_jbddirty(bh_in));
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 363)
6ccaf3e2f302b (Michal Hocko 2015-06-08 10:53:10 -0400 364) new_bh = alloc_buffer_head(GFP_NOFS|__GFP_NOFAIL);
47def82672b3b (Theodore Ts'o 2010-07-27 11:56:05 -0400 365)
96577c4382769 (dingdinghua 2009-07-13 17:55:35 -0400 366) /* keep subsequent assertions sane */
96577c4382769 (dingdinghua 2009-07-13 17:55:35 -0400 367) atomic_set(&new_bh->b_count, 1);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 368)
464170647b564 (Thomas Gleixner 2019-08-09 14:42:32 +0200 369) spin_lock(&jh_in->b_state_lock);
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 370) repeat:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 371) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 372) * If a new transaction has already done a buffer copy-out, then
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 373) * we use that version of the data for the commit.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 374) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 375) if (jh_in->b_frozen_data) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 376) done_copy_out = 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 377) new_page = virt_to_page(jh_in->b_frozen_data);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 378) new_offset = offset_in_page(jh_in->b_frozen_data);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 379) } else {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 380) new_page = jh2bh(jh_in)->b_page;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 381) new_offset = offset_in_page(jh2bh(jh_in)->b_data);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 382) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 383)
303a8f2afc7ba (Cong Wang 2011-11-25 23:14:31 +0800 384) mapped_data = kmap_atomic(new_page);
e06c8227fd94e (Joel Becker 2008-09-11 15:35:47 -0700 385) /*
13ceef099edd2 (Jan Kara 2010-07-14 07:56:33 +0200 386) * Fire data frozen trigger if data already wasn't frozen. Do this
13ceef099edd2 (Jan Kara 2010-07-14 07:56:33 +0200 387) * before checking for escaping, as the trigger may modify the magic
13ceef099edd2 (Jan Kara 2010-07-14 07:56:33 +0200 388) * offset. If a copy-out happens afterwards, it will have the correct
13ceef099edd2 (Jan Kara 2010-07-14 07:56:33 +0200 389) * data in the buffer.
e06c8227fd94e (Joel Becker 2008-09-11 15:35:47 -0700 390) */
13ceef099edd2 (Jan Kara 2010-07-14 07:56:33 +0200 391) if (!done_copy_out)
13ceef099edd2 (Jan Kara 2010-07-14 07:56:33 +0200 392) jbd2_buffer_frozen_trigger(jh_in, mapped_data + new_offset,
13ceef099edd2 (Jan Kara 2010-07-14 07:56:33 +0200 393) jh_in->b_triggers);
e06c8227fd94e (Joel Becker 2008-09-11 15:35:47 -0700 394)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 395) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 396) * Check for escaping
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 397) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 398) if (*((__be32 *)(mapped_data + new_offset)) ==
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 399) cpu_to_be32(JBD2_MAGIC_NUMBER)) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 400) need_copy_out = 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 401) do_escape = 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 402) }
303a8f2afc7ba (Cong Wang 2011-11-25 23:14:31 +0800 403) kunmap_atomic(mapped_data);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 404)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 405) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 406) * Do we need to do a data copy?
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 407) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 408) if (need_copy_out && !done_copy_out) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 409) char *tmp;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 410)
464170647b564 (Thomas Gleixner 2019-08-09 14:42:32 +0200 411) spin_unlock(&jh_in->b_state_lock);
af1e76d6b3f37 (Mingming Cao 2007-10-16 18:38:25 -0400 412) tmp = jbd2_alloc(bh_in->b_size, GFP_NOFS);
e6ec116b67f46 (Theodore Ts'o 2009-12-01 09:04:42 -0500 413) if (!tmp) {
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 414) brelse(new_bh);
e6ec116b67f46 (Theodore Ts'o 2009-12-01 09:04:42 -0500 415) return -ENOMEM;
e6ec116b67f46 (Theodore Ts'o 2009-12-01 09:04:42 -0500 416) }
464170647b564 (Thomas Gleixner 2019-08-09 14:42:32 +0200 417) spin_lock(&jh_in->b_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 418) if (jh_in->b_frozen_data) {
af1e76d6b3f37 (Mingming Cao 2007-10-16 18:38:25 -0400 419) jbd2_free(tmp, bh_in->b_size);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 420) goto repeat;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 421) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 422)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 423) jh_in->b_frozen_data = tmp;
303a8f2afc7ba (Cong Wang 2011-11-25 23:14:31 +0800 424) mapped_data = kmap_atomic(new_page);
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 425) memcpy(tmp, mapped_data + new_offset, bh_in->b_size);
303a8f2afc7ba (Cong Wang 2011-11-25 23:14:31 +0800 426) kunmap_atomic(mapped_data);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 427)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 428) new_page = virt_to_page(tmp);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 429) new_offset = offset_in_page(tmp);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 430) done_copy_out = 1;
e06c8227fd94e (Joel Becker 2008-09-11 15:35:47 -0700 431)
e06c8227fd94e (Joel Becker 2008-09-11 15:35:47 -0700 432) /*
e06c8227fd94e (Joel Becker 2008-09-11 15:35:47 -0700 433) * This isn't strictly necessary, as we're using frozen
e06c8227fd94e (Joel Becker 2008-09-11 15:35:47 -0700 434) * data for the escaping, but it keeps consistency with
e06c8227fd94e (Joel Becker 2008-09-11 15:35:47 -0700 435) * b_frozen_data usage.
e06c8227fd94e (Joel Becker 2008-09-11 15:35:47 -0700 436) */
e06c8227fd94e (Joel Becker 2008-09-11 15:35:47 -0700 437) jh_in->b_frozen_triggers = jh_in->b_triggers;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 438) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 439)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 440) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 441) * Did we need to do an escaping? Now we've done all the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 442) * copying, we can finally do so.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 443) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 444) if (do_escape) {
303a8f2afc7ba (Cong Wang 2011-11-25 23:14:31 +0800 445) mapped_data = kmap_atomic(new_page);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 446) *((unsigned int *)(mapped_data + new_offset)) = 0;
303a8f2afc7ba (Cong Wang 2011-11-25 23:14:31 +0800 447) kunmap_atomic(mapped_data);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 448) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 449)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 450) set_bh_page(new_bh, new_page, new_offset);
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 451) new_bh->b_size = bh_in->b_size;
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 452) new_bh->b_bdev = journal->j_dev;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 453) new_bh->b_blocknr = blocknr;
b34090e5e22a0 (Jan Kara 2013-06-04 12:08:56 -0400 454) new_bh->b_private = bh_in;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 455) set_buffer_mapped(new_bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 456) set_buffer_dirty(new_bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 457)
f5113effc2a2e (Jan Kara 2013-06-04 12:01:45 -0400 458) *bh_out = new_bh;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 459)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 460) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 461) * The to-be-written buffer needs to get moved to the io queue,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 462) * and the original buffer whose contents we are shadowing or
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 463) * copying is moved to the transaction's shadow queue.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 464) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 465) JBUFFER_TRACE(jh_in, "file as BJ_Shadow");
96577c4382769 (dingdinghua 2009-07-13 17:55:35 -0400 466) spin_lock(&journal->j_list_lock);
96577c4382769 (dingdinghua 2009-07-13 17:55:35 -0400 467) __jbd2_journal_file_buffer(jh_in, transaction, BJ_Shadow);
96577c4382769 (dingdinghua 2009-07-13 17:55:35 -0400 468) spin_unlock(&journal->j_list_lock);
b34090e5e22a0 (Jan Kara 2013-06-04 12:08:56 -0400 469) set_buffer_shadow(bh_in);
464170647b564 (Thomas Gleixner 2019-08-09 14:42:32 +0200 470) spin_unlock(&jh_in->b_state_lock);
96577c4382769 (dingdinghua 2009-07-13 17:55:35 -0400 471)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 472) return do_escape | (done_copy_out << 1);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 473) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 474)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 475) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 476) * Allocation code for the journal file. Manage the space left in the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 477) * journal, so that we can begin checkpointing when appropriate.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 478) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 479)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 480) /*
e44718318004a (Theodore Ts'o 2011-02-12 08:18:24 -0500 481) * Called with j_state_lock locked for writing.
e44718318004a (Theodore Ts'o 2011-02-12 08:18:24 -0500 482) * Returns true if a transaction commit was started.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 483) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 484) int __jbd2_log_start_commit(journal_t *journal, tid_t target)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 485) {
e7b04ac00ee27 (Eric Sandeen 2013-01-30 00:39:28 -0500 486) /* Return if the txn has already requested to be committed */
e7b04ac00ee27 (Eric Sandeen 2013-01-30 00:39:28 -0500 487) if (journal->j_commit_request == target)
e7b04ac00ee27 (Eric Sandeen 2013-01-30 00:39:28 -0500 488) return 0;
e7b04ac00ee27 (Eric Sandeen 2013-01-30 00:39:28 -0500 489)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 490) /*
deeeaf13b2914 (Theodore Ts'o 2011-05-01 18:16:26 -0400 491) * The only transaction we can possibly wait upon is the
deeeaf13b2914 (Theodore Ts'o 2011-05-01 18:16:26 -0400 492) * currently running transaction (if it exists). Otherwise,
deeeaf13b2914 (Theodore Ts'o 2011-05-01 18:16:26 -0400 493) * the target tid must be an old one.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 494) */
deeeaf13b2914 (Theodore Ts'o 2011-05-01 18:16:26 -0400 495) if (journal->j_running_transaction &&
deeeaf13b2914 (Theodore Ts'o 2011-05-01 18:16:26 -0400 496) journal->j_running_transaction->t_tid == target) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 497) /*
bcf3d0bcff9c2 (Andrea Gelmini 2010-10-16 15:19:14 +0200 498) * We want a new commit: OK, mark the request and wakeup the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 499) * commit thread. We do _not_ do the commit ourselves.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 500) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 501)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 502) journal->j_commit_request = target;
7821ce417ec73 (Gaowei Pu 2019-05-30 15:08:34 -0400 503) jbd_debug(1, "JBD2: requesting commit %u/%u\n",
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 504) journal->j_commit_request,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 505) journal->j_commit_sequence);
9fff24aa2c5c5 (Theodore Ts'o 2013-02-06 22:30:23 -0500 506) journal->j_running_transaction->t_requested = jiffies;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 507) wake_up(&journal->j_wait_commit);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 508) return 1;
deeeaf13b2914 (Theodore Ts'o 2011-05-01 18:16:26 -0400 509) } else if (!tid_geq(journal->j_commit_request, target))
deeeaf13b2914 (Theodore Ts'o 2011-05-01 18:16:26 -0400 510) /* This should never happen, but if it does, preserve
deeeaf13b2914 (Theodore Ts'o 2011-05-01 18:16:26 -0400 511) the evidence before kjournald goes into a loop and
deeeaf13b2914 (Theodore Ts'o 2011-05-01 18:16:26 -0400 512) increments j_commit_sequence beyond all recognition. */
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 513) WARN_ONCE(1, "JBD2: bad log_start_commit: %u %u %u %u\n",
1be2add685181 (Theodore Ts'o 2011-05-08 19:37:54 -0400 514) journal->j_commit_request,
1be2add685181 (Theodore Ts'o 2011-05-08 19:37:54 -0400 515) journal->j_commit_sequence,
7821ce417ec73 (Gaowei Pu 2019-05-30 15:08:34 -0400 516) target, journal->j_running_transaction ?
1be2add685181 (Theodore Ts'o 2011-05-08 19:37:54 -0400 517) journal->j_running_transaction->t_tid : 0);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 518) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 519) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 520)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 521) int jbd2_log_start_commit(journal_t *journal, tid_t tid)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 522) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 523) int ret;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 524)
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 525) write_lock(&journal->j_state_lock);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 526) ret = __jbd2_log_start_commit(journal, tid);
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 527) write_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 528) return ret;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 529) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 530)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 531) /*
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 532) * Force and wait any uncommitted transactions. We can only force the running
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 533) * transaction if we don't have an active handle, otherwise, we will deadlock.
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 534) * Returns: <0 in case of error,
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 535) * 0 if nothing to commit,
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 536) * 1 if transaction was successfully committed.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 537) */
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 538) static int __jbd2_journal_force_commit(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 539) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 540) transaction_t *transaction = NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 541) tid_t tid;
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 542) int need_to_start = 0, ret = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 543)
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 544) read_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 545) if (journal->j_running_transaction && !current->journal_info) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 546) transaction = journal->j_running_transaction;
e44718318004a (Theodore Ts'o 2011-02-12 08:18:24 -0500 547) if (!tid_geq(journal->j_commit_request, transaction->t_tid))
e44718318004a (Theodore Ts'o 2011-02-12 08:18:24 -0500 548) need_to_start = 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 549) } else if (journal->j_committing_transaction)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 550) transaction = journal->j_committing_transaction;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 551)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 552) if (!transaction) {
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 553) /* Nothing to commit */
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 554) read_unlock(&journal->j_state_lock);
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 555) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 556) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 557) tid = transaction->t_tid;
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 558) read_unlock(&journal->j_state_lock);
e44718318004a (Theodore Ts'o 2011-02-12 08:18:24 -0500 559) if (need_to_start)
e44718318004a (Theodore Ts'o 2011-02-12 08:18:24 -0500 560) jbd2_log_start_commit(journal, tid);
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 561) ret = jbd2_log_wait_commit(journal, tid);
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 562) if (!ret)
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 563) ret = 1;
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 564)
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 565) return ret;
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 566) }
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 567)
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 568) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 569) * jbd2_journal_force_commit_nested - Force and wait upon a commit if the
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 570) * calling process is not within transaction.
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 571) *
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 572) * @journal: journal to force
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 573) * Returns true if progress was made.
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 574) *
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 575) * This is used for forcing out undo-protected data which contains
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 576) * bitmaps, when the fs is running out of space.
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 577) */
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 578) int jbd2_journal_force_commit_nested(journal_t *journal)
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 579) {
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 580) int ret;
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 581)
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 582) ret = __jbd2_journal_force_commit(journal);
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 583) return ret > 0;
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 584) }
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 585)
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 586) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 587) * jbd2_journal_force_commit() - force any uncommitted transactions
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 588) * @journal: journal to force
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 589) *
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 590) * Caller want unconditional commit. We can only force the running transaction
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 591) * if we don't have an active handle, otherwise, we will deadlock.
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 592) */
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 593) int jbd2_journal_force_commit(journal_t *journal)
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 594) {
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 595) int ret;
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 596)
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 597) J_ASSERT(!current->journal_info);
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 598) ret = __jbd2_journal_force_commit(journal);
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 599) if (ret > 0)
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 600) ret = 0;
9ff8644624772 (Dmitry Monakhov 2013-06-12 22:24:07 -0400 601) return ret;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 602) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 603)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 604) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 605) * Start a commit of the current running transaction (if any). Returns true
c88ccea314397 (Jan Kara 2009-02-10 11:27:46 -0500 606) * if a transaction is going to be committed (or is currently already
c88ccea314397 (Jan Kara 2009-02-10 11:27:46 -0500 607) * committing), and fills its tid in at *ptid
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 608) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 609) int jbd2_journal_start_commit(journal_t *journal, tid_t *ptid)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 610) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 611) int ret = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 612)
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 613) write_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 614) if (journal->j_running_transaction) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 615) tid_t tid = journal->j_running_transaction->t_tid;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 616)
c88ccea314397 (Jan Kara 2009-02-10 11:27:46 -0500 617) __jbd2_log_start_commit(journal, tid);
c88ccea314397 (Jan Kara 2009-02-10 11:27:46 -0500 618) /* There's a running transaction and we've just made sure
c88ccea314397 (Jan Kara 2009-02-10 11:27:46 -0500 619) * it's commit has been scheduled. */
c88ccea314397 (Jan Kara 2009-02-10 11:27:46 -0500 620) if (ptid)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 621) *ptid = tid;
c88ccea314397 (Jan Kara 2009-02-10 11:27:46 -0500 622) ret = 1;
c88ccea314397 (Jan Kara 2009-02-10 11:27:46 -0500 623) } else if (journal->j_committing_transaction) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 624) /*
12810ad70858a (Artem Bityutskiy 2012-07-25 18:12:07 +0300 625) * If commit has been started, then we have to wait for
12810ad70858a (Artem Bityutskiy 2012-07-25 18:12:07 +0300 626) * completion of that transaction.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 627) */
c88ccea314397 (Jan Kara 2009-02-10 11:27:46 -0500 628) if (ptid)
c88ccea314397 (Jan Kara 2009-02-10 11:27:46 -0500 629) *ptid = journal->j_committing_transaction->t_tid;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 630) ret = 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 631) }
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 632) write_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 633) return ret;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 634) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 635)
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 636) /*
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 637) * Return 1 if a given transaction has not yet sent barrier request
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 638) * connected with a transaction commit. If 0 is returned, transaction
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 639) * may or may not have sent the barrier. Used to avoid sending barrier
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 640) * twice in common cases.
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 641) */
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 642) int jbd2_trans_will_send_data_barrier(journal_t *journal, tid_t tid)
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 643) {
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 644) int ret = 0;
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 645) transaction_t *commit_trans;
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 646)
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 647) if (!(journal->j_flags & JBD2_BARRIER))
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 648) return 0;
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 649) read_lock(&journal->j_state_lock);
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 650) /* Transaction already committed? */
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 651) if (tid_geq(journal->j_commit_sequence, tid))
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 652) goto out;
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 653) commit_trans = journal->j_committing_transaction;
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 654) if (!commit_trans || commit_trans->t_tid != tid) {
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 655) ret = 1;
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 656) goto out;
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 657) }
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 658) /*
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 659) * Transaction is being committed and we already proceeded to
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 660) * submitting a flush to fs partition?
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 661) */
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 662) if (journal->j_fs_dev != journal->j_dev) {
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 663) if (!commit_trans->t_need_data_flush ||
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 664) commit_trans->t_state >= T_COMMIT_DFLUSH)
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 665) goto out;
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 666) } else {
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 667) if (commit_trans->t_state >= T_COMMIT_JFLUSH)
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 668) goto out;
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 669) }
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 670) ret = 1;
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 671) out:
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 672) read_unlock(&journal->j_state_lock);
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 673) return ret;
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 674) }
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 675) EXPORT_SYMBOL(jbd2_trans_will_send_data_barrier);
bbd2be3691072 (Jan Kara 2011-05-24 11:59:18 -0400 676)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 677) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 678) * Wait for a specified commit to complete.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 679) * The caller may not hold the journal lock.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 680) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 681) int jbd2_log_wait_commit(journal_t *journal, tid_t tid)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 682) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 683) int err = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 684)
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 685) read_lock(&journal->j_state_lock);
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 686) #ifdef CONFIG_PROVE_LOCKING
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 687) /*
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 688) * Some callers make sure transaction is already committing and in that
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 689) * case we cannot block on open handles anymore. So don't warn in that
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 690) * case.
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 691) */
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 692) if (tid_gt(tid, journal->j_commit_sequence) &&
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 693) (!journal->j_committing_transaction ||
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 694) journal->j_committing_transaction->t_tid != tid)) {
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 695) read_unlock(&journal->j_state_lock);
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 696) jbd2_might_wait_for_commit(journal);
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 697) read_lock(&journal->j_state_lock);
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 698) }
c52c47e4b4fbe (Jan Kara 2017-04-29 20:12:16 -0400 699) #endif
e23291b9120c1 (Jose R. Santos 2007-07-18 08:57:06 -0400 700) #ifdef CONFIG_JBD2_DEBUG
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 701) if (!tid_geq(journal->j_commit_request, tid)) {
75685071cd5b2 (Jan Kara 2013-12-08 21:13:59 -0500 702) printk(KERN_ERR
7821ce417ec73 (Gaowei Pu 2019-05-30 15:08:34 -0400 703) "%s: error: j_commit_request=%u, tid=%u\n",
329d291f50d53 (Harvey Harrison 2008-04-17 10:38:59 -0400 704) __func__, journal->j_commit_request, tid);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 705) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 706) #endif
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 707) while (tid_gt(tid, journal->j_commit_sequence)) {
7821ce417ec73 (Gaowei Pu 2019-05-30 15:08:34 -0400 708) jbd_debug(1, "JBD2: want %u, j_commit_sequence=%u\n",
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 709) tid, journal->j_commit_sequence);
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 710) read_unlock(&journal->j_state_lock);
3469a32a1e948 (Theodore Ts'o 2014-03-08 19:11:36 -0500 711) wake_up(&journal->j_wait_commit);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 712) wait_event(journal->j_wait_done_commit,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 713) !tid_gt(tid, journal->j_commit_sequence));
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 714) read_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 715) }
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 716) read_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 717)
75685071cd5b2 (Jan Kara 2013-12-08 21:13:59 -0500 718) if (unlikely(is_journal_aborted(journal)))
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 719) err = -EIO;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 720) return err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 721) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 722)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 723) /*
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 724) * Start a fast commit. If there's an ongoing fast or full commit wait for
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 725) * it to complete. Returns 0 if a new fast commit was started. Returns -EALREADY
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 726) * if a fast commit is not needed, either because there's an already a commit
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 727) * going on or this tid has already been committed. Returns -EINVAL if no jbd2
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 728) * commit has yet been performed.
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 729) */
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 730) int jbd2_fc_begin_commit(journal_t *journal, tid_t tid)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 731) {
87a144f093801 (Harshad Shirwadkar 2020-11-05 19:59:10 -0800 732) if (unlikely(is_journal_aborted(journal)))
87a144f093801 (Harshad Shirwadkar 2020-11-05 19:59:10 -0800 733) return -EIO;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 734) /*
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 735) * Fast commits only allowed if at least one full commit has
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 736) * been processed.
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 737) */
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 738) if (!journal->j_stats.ts_tid)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 739) return -EINVAL;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 740)
480f89d553260 (Harshad Shirwadkar 2020-11-05 19:59:01 -0800 741) write_lock(&journal->j_state_lock);
480f89d553260 (Harshad Shirwadkar 2020-11-05 19:59:01 -0800 742) if (tid <= journal->j_commit_sequence) {
480f89d553260 (Harshad Shirwadkar 2020-11-05 19:59:01 -0800 743) write_unlock(&journal->j_state_lock);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 744) return -EALREADY;
480f89d553260 (Harshad Shirwadkar 2020-11-05 19:59:01 -0800 745) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 746)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 747) if (journal->j_flags & JBD2_FULL_COMMIT_ONGOING ||
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 748) (journal->j_flags & JBD2_FAST_COMMIT_ONGOING)) {
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 749) DEFINE_WAIT(wait);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 750)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 751) prepare_to_wait(&journal->j_fc_wait, &wait,
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 752) TASK_UNINTERRUPTIBLE);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 753) write_unlock(&journal->j_state_lock);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 754) schedule();
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 755) finish_wait(&journal->j_fc_wait, &wait);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 756) return -EALREADY;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 757) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 758) journal->j_flags |= JBD2_FAST_COMMIT_ONGOING;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 759) write_unlock(&journal->j_state_lock);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 760)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 761) return 0;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 762) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 763) EXPORT_SYMBOL(jbd2_fc_begin_commit);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 764)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 765) /*
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 766) * Stop a fast commit. If fallback is set, this function starts commit of
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 767) * TID tid before any other fast commit can start.
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 768) */
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 769) static int __jbd2_fc_end_commit(journal_t *journal, tid_t tid, bool fallback)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 770) {
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 771) if (journal->j_fc_cleanup_callback)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 772) journal->j_fc_cleanup_callback(journal, 0);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 773) write_lock(&journal->j_state_lock);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 774) journal->j_flags &= ~JBD2_FAST_COMMIT_ONGOING;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 775) if (fallback)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 776) journal->j_flags |= JBD2_FULL_COMMIT_ONGOING;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 777) write_unlock(&journal->j_state_lock);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 778) wake_up(&journal->j_fc_wait);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 779) if (fallback)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 780) return jbd2_complete_transaction(journal, tid);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 781) return 0;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 782) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 783)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 784) int jbd2_fc_end_commit(journal_t *journal)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 785) {
0bce577bf9cae (Harshad Shirwadkar 2020-11-05 19:58:58 -0800 786) return __jbd2_fc_end_commit(journal, 0, false);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 787) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 788) EXPORT_SYMBOL(jbd2_fc_end_commit);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 789)
0bce577bf9cae (Harshad Shirwadkar 2020-11-05 19:58:58 -0800 790) int jbd2_fc_end_commit_fallback(journal_t *journal)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 791) {
0bce577bf9cae (Harshad Shirwadkar 2020-11-05 19:58:58 -0800 792) tid_t tid;
0bce577bf9cae (Harshad Shirwadkar 2020-11-05 19:58:58 -0800 793)
0bce577bf9cae (Harshad Shirwadkar 2020-11-05 19:58:58 -0800 794) read_lock(&journal->j_state_lock);
0bce577bf9cae (Harshad Shirwadkar 2020-11-05 19:58:58 -0800 795) tid = journal->j_running_transaction ?
0bce577bf9cae (Harshad Shirwadkar 2020-11-05 19:58:58 -0800 796) journal->j_running_transaction->t_tid : 0;
0bce577bf9cae (Harshad Shirwadkar 2020-11-05 19:58:58 -0800 797) read_unlock(&journal->j_state_lock);
0bce577bf9cae (Harshad Shirwadkar 2020-11-05 19:58:58 -0800 798) return __jbd2_fc_end_commit(journal, tid, true);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 799) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 800) EXPORT_SYMBOL(jbd2_fc_end_commit_fallback);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 801)
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 802) /* Return 1 when transaction with given tid has already committed. */
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 803) int jbd2_transaction_committed(journal_t *journal, tid_t tid)
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 804) {
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 805) int ret = 1;
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 806)
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 807) read_lock(&journal->j_state_lock);
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 808) if (journal->j_running_transaction &&
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 809) journal->j_running_transaction->t_tid == tid)
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 810) ret = 0;
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 811) if (journal->j_committing_transaction &&
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 812) journal->j_committing_transaction->t_tid == tid)
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 813) ret = 0;
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 814) read_unlock(&journal->j_state_lock);
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 815) return ret;
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 816) }
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 817) EXPORT_SYMBOL(jbd2_transaction_committed);
b8a6176c214cf (Jan Kara 2017-11-01 16:36:45 +0100 818)
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 819) /*
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 820) * When this function returns the transaction corresponding to tid
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 821) * will be completed. If the transaction has currently running, start
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 822) * committing that transaction before waiting for it to complete. If
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 823) * the transaction id is stale, it is by definition already completed,
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 824) * so just return SUCCESS.
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 825) */
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 826) int jbd2_complete_transaction(journal_t *journal, tid_t tid)
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 827) {
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 828) int need_to_wait = 1;
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 829)
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 830) read_lock(&journal->j_state_lock);
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 831) if (journal->j_running_transaction &&
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 832) journal->j_running_transaction->t_tid == tid) {
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 833) if (journal->j_commit_request != tid) {
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 834) /* transaction not yet started, so request it */
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 835) read_unlock(&journal->j_state_lock);
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 836) jbd2_log_start_commit(journal, tid);
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 837) goto wait_commit;
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 838) }
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 839) } else if (!(journal->j_committing_transaction &&
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 840) journal->j_committing_transaction->t_tid == tid))
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 841) need_to_wait = 0;
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 842) read_unlock(&journal->j_state_lock);
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 843) if (!need_to_wait)
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 844) return 0;
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 845) wait_commit:
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 846) return jbd2_log_wait_commit(journal, tid);
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 847) }
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 848) EXPORT_SYMBOL(jbd2_complete_transaction);
d76a3a77113db (Theodore Ts'o 2013-04-03 22:02:52 -0400 849)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 850) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 851) * Log buffer allocation routines:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 852) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 853)
18eba7aae080d (Mingming Cao 2006-10-11 01:21:13 -0700 854) int jbd2_journal_next_log_block(journal_t *journal, unsigned long long *retp)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 855) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 856) unsigned long blocknr;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 857)
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 858) write_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 859) J_ASSERT(journal->j_free > 1);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 860)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 861) blocknr = journal->j_head;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 862) journal->j_head++;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 863) journal->j_free--;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 864) if (journal->j_head == journal->j_last)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 865) journal->j_head = journal->j_first;
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 866) write_unlock(&journal->j_state_lock);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 867) return jbd2_journal_bmap(journal, blocknr, retp);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 868) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 869)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 870) /* Map one fast commit buffer for use by the file system */
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 871) int jbd2_fc_get_buf(journal_t *journal, struct buffer_head **bh_out)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 872) {
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 873) unsigned long long pblock;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 874) unsigned long blocknr;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 875) int ret = 0;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 876) struct buffer_head *bh;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 877) int fc_off;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 878)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 879) *bh_out = NULL;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 880)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 881) if (journal->j_fc_off + journal->j_fc_first < journal->j_fc_last) {
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 882) fc_off = journal->j_fc_off;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 883) blocknr = journal->j_fc_first + fc_off;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 884) journal->j_fc_off++;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 885) } else {
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 886) ret = -EINVAL;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 887) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 888)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 889) if (ret)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 890) return ret;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 891)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 892) ret = jbd2_journal_bmap(journal, blocknr, &pblock);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 893) if (ret)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 894) return ret;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 895)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 896) bh = __getblk(journal->j_dev, pblock, journal->j_blocksize);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 897) if (!bh)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 898) return -ENOMEM;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 899)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 900)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 901) journal->j_fc_wbuf[fc_off] = bh;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 902)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 903) *bh_out = bh;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 904)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 905) return 0;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 906) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 907) EXPORT_SYMBOL(jbd2_fc_get_buf);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 908)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 909) /*
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 910) * Wait on fast commit buffers that were allocated by jbd2_fc_get_buf
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 911) * for completion.
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 912) */
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 913) int jbd2_fc_wait_bufs(journal_t *journal, int num_blks)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 914) {
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 915) struct buffer_head *bh;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 916) int i, j_fc_off;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 917)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 918) j_fc_off = journal->j_fc_off;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 919)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 920) /*
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 921) * Wait in reverse order to minimize chances of us being woken up before
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 922) * all IOs have completed
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 923) */
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 924) for (i = j_fc_off - 1; i >= j_fc_off - num_blks; i--) {
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 925) bh = journal->j_fc_wbuf[i];
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 926) wait_on_buffer(bh);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 927) put_bh(bh);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 928) journal->j_fc_wbuf[i] = NULL;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 929) if (unlikely(!buffer_uptodate(bh)))
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 930) return -EIO;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 931) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 932)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 933) return 0;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 934) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 935) EXPORT_SYMBOL(jbd2_fc_wait_bufs);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 936)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 937) /*
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 938) * Wait on fast commit buffers that were allocated by jbd2_fc_get_buf
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 939) * for completion.
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 940) */
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 941) int jbd2_fc_release_bufs(journal_t *journal)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 942) {
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 943) struct buffer_head *bh;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 944) int i, j_fc_off;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 945)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 946) j_fc_off = journal->j_fc_off;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 947)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 948) /*
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 949) * Wait in reverse order to minimize chances of us being woken up before
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 950) * all IOs have completed
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 951) */
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 952) for (i = j_fc_off - 1; i >= 0; i--) {
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 953) bh = journal->j_fc_wbuf[i];
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 954) if (!bh)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 955) break;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 956) put_bh(bh);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 957) journal->j_fc_wbuf[i] = NULL;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 958) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 959)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 960) return 0;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 961) }
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 962) EXPORT_SYMBOL(jbd2_fc_release_bufs);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 963)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 964) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 965) * Conversion of logical to physical block numbers for the journal
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 966) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 967) * On external journals the journal blocks are identity-mapped, so
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 968) * this is a no-op. If needed, we can use j_blk_offset - everything is
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 969) * ready.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 970) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 971) int jbd2_journal_bmap(journal_t *journal, unsigned long blocknr,
18eba7aae080d (Mingming Cao 2006-10-11 01:21:13 -0700 972) unsigned long long *retp)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 973) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 974) int err = 0;
18eba7aae080d (Mingming Cao 2006-10-11 01:21:13 -0700 975) unsigned long long ret;
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 976) sector_t block = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 977)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 978) if (journal->j_inode) {
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 979) block = blocknr;
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 980) ret = bmap(journal->j_inode, &block);
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 981)
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 982) if (ret || !block) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 983) printk(KERN_ALERT "%s: journal block not found "
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 984) "at offset %lu on %s\n",
05496769e5da8 (Theodore Ts'o 2008-09-16 14:36:17 -0400 985) __func__, blocknr, journal->j_devname);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 986) err = -EIO;
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 987) jbd2_journal_abort(journal, err);
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 988) } else {
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 989) *retp = block;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 990) }
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 991)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 992) } else {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 993) *retp = blocknr; /* +journal->j_blk_offset */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 994) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 995) return err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 996) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 997)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 998) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 999) * We play buffer_head aliasing tricks to write data/metadata blocks to
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1000) * the journal without copying their contents, but for journal
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1001) * descriptor blocks we do need to generate bona fide buffers.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1002) *
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1003) * After the caller of jbd2_journal_get_descriptor_buffer() has finished modifying
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1004) * the buffer's contents they really should run flush_dcache_page(bh->b_page).
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1005) * But we don't bother doing that, so there will be coherency problems with
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1006) * mmaps of blockdevs which hold live JBD-controlled filesystems.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1007) */
32ab671599a89 (Jan Kara 2016-02-22 23:17:15 -0500 1008) struct buffer_head *
32ab671599a89 (Jan Kara 2016-02-22 23:17:15 -0500 1009) jbd2_journal_get_descriptor_buffer(transaction_t *transaction, int type)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1010) {
32ab671599a89 (Jan Kara 2016-02-22 23:17:15 -0500 1011) journal_t *journal = transaction->t_journal;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1012) struct buffer_head *bh;
18eba7aae080d (Mingming Cao 2006-10-11 01:21:13 -0700 1013) unsigned long long blocknr;
32ab671599a89 (Jan Kara 2016-02-22 23:17:15 -0500 1014) journal_header_t *header;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1015) int err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1016)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1017) err = jbd2_journal_next_log_block(journal, &blocknr);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1018)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1019) if (err)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1020) return NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1021)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1022) bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
4b905671d2ea0 (Jan Kara 2009-01-06 14:53:35 -0500 1023) if (!bh)
4b905671d2ea0 (Jan Kara 2009-01-06 14:53:35 -0500 1024) return NULL;
9f356e5a4f120 (Jan Kara 2019-11-05 17:44:24 +0100 1025) atomic_dec(&transaction->t_outstanding_credits);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1026) lock_buffer(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1027) memset(bh->b_data, 0, journal->j_blocksize);
32ab671599a89 (Jan Kara 2016-02-22 23:17:15 -0500 1028) header = (journal_header_t *)bh->b_data;
32ab671599a89 (Jan Kara 2016-02-22 23:17:15 -0500 1029) header->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER);
32ab671599a89 (Jan Kara 2016-02-22 23:17:15 -0500 1030) header->h_blocktype = cpu_to_be32(type);
32ab671599a89 (Jan Kara 2016-02-22 23:17:15 -0500 1031) header->h_sequence = cpu_to_be32(transaction->t_tid);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1032) set_buffer_uptodate(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1033) unlock_buffer(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1034) BUFFER_TRACE(bh, "return this buffer");
e5a120aeb57f4 (Jan Kara 2013-06-04 12:06:01 -0400 1035) return bh;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1036) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1037)
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1038) void jbd2_descriptor_block_csum_set(journal_t *j, struct buffer_head *bh)
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1039) {
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1040) struct jbd2_journal_block_tail *tail;
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1041) __u32 csum;
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1042)
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1043) if (!jbd2_journal_has_csum_v2or3(j))
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1044) return;
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1045)
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1046) tail = (struct jbd2_journal_block_tail *)(bh->b_data + j->j_blocksize -
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1047) sizeof(struct jbd2_journal_block_tail));
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1048) tail->t_checksum = 0;
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1049) csum = jbd2_chksum(j, j->j_csum_seed, bh->b_data, j->j_blocksize);
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1050) tail->t_checksum = cpu_to_be32(csum);
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1051) }
1101cd4d13ba2 (Jan Kara 2016-02-22 23:19:09 -0500 1052)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1053) /*
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1054) * Return tid of the oldest transaction in the journal and block in the journal
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1055) * where the transaction starts.
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1056) *
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1057) * If the journal is now empty, return which will be the next transaction ID
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1058) * we will write and where will that transaction start.
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1059) *
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1060) * The return value is 0 if journal tail cannot be pushed any further, 1 if
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1061) * it can.
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1062) */
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1063) int jbd2_journal_get_log_tail(journal_t *journal, tid_t *tid,
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1064) unsigned long *block)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1065) {
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1066) transaction_t *transaction;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1067) int ret;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1068)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1069) read_lock(&journal->j_state_lock);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1070) spin_lock(&journal->j_list_lock);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1071) transaction = journal->j_checkpoint_transactions;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1072) if (transaction) {
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1073) *tid = transaction->t_tid;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1074) *block = transaction->t_log_start;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1075) } else if ((transaction = journal->j_committing_transaction) != NULL) {
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1076) *tid = transaction->t_tid;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1077) *block = transaction->t_log_start;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1078) } else if ((transaction = journal->j_running_transaction) != NULL) {
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1079) *tid = transaction->t_tid;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1080) *block = journal->j_head;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1081) } else {
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1082) *tid = journal->j_transaction_sequence;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1083) *block = journal->j_head;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1084) }
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1085) ret = tid_gt(*tid, journal->j_tail_sequence);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1086) spin_unlock(&journal->j_list_lock);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1087) read_unlock(&journal->j_state_lock);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1088)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1089) return ret;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1090) }
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1091)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1092) /*
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1093) * Update information in journal structure and in on disk journal superblock
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1094) * about log tail. This function does not check whether information passed in
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1095) * really pushes log tail further. It's responsibility of the caller to make
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1096) * sure provided log tail information is valid (e.g. by holding
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1097) * j_checkpoint_mutex all the time between computing log tail and calling this
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1098) * function as is the case with jbd2_cleanup_journal_tail()).
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1099) *
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1100) * Requires j_checkpoint_mutex
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1101) */
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1102) int __jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1103) {
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1104) unsigned long freed;
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1105) int ret;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1106)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1107) BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex));
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1108)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1109) /*
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1110) * We cannot afford for write to remain in drive's caches since as
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1111) * soon as we update j_tail, next transaction can start reusing journal
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1112) * space and if we lose sb update during power failure we'd replay
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1113) * old transaction with possibly newly overwritten data.
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1114) */
17f423b516076 (Jan Kara 2017-05-04 11:01:31 -0400 1115) ret = jbd2_journal_update_sb_log_tail(journal, tid, block,
17f423b516076 (Jan Kara 2017-05-04 11:01:31 -0400 1116) REQ_SYNC | REQ_FUA);
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1117) if (ret)
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1118) goto out;
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1119)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1120) write_lock(&journal->j_state_lock);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1121) freed = block - journal->j_tail;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1122) if (block < journal->j_tail)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1123) freed += journal->j_last - journal->j_first;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1124)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1125) trace_jbd2_update_log_tail(journal, tid, block, freed);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1126) jbd_debug(1,
7821ce417ec73 (Gaowei Pu 2019-05-30 15:08:34 -0400 1127) "Cleaning journal tail from %u to %u (offset %lu), "
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1128) "freeing %lu\n",
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1129) journal->j_tail_sequence, tid, block, freed);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1130)
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1131) journal->j_free += freed;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1132) journal->j_tail_sequence = tid;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1133) journal->j_tail = block;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1134) write_unlock(&journal->j_state_lock);
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1135)
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1136) out:
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1137) return ret;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1138) }
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1139)
3339578f05787 (Jan Kara 2012-03-13 22:45:38 -0400 1140) /*
85e0c4e89c1b8 (Theodore Ts'o 2018-02-19 12:22:53 -0500 1141) * This is a variation of __jbd2_update_log_tail which checks for validity of
3339578f05787 (Jan Kara 2012-03-13 22:45:38 -0400 1142) * provided log tail and locks j_checkpoint_mutex. So it is safe against races
3339578f05787 (Jan Kara 2012-03-13 22:45:38 -0400 1143) * with other threads updating log tail.
3339578f05787 (Jan Kara 2012-03-13 22:45:38 -0400 1144) */
3339578f05787 (Jan Kara 2012-03-13 22:45:38 -0400 1145) void jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block)
3339578f05787 (Jan Kara 2012-03-13 22:45:38 -0400 1146) {
6fa7aa50b2c48 (Tejun Heo 2016-10-28 12:58:12 -0400 1147) mutex_lock_io(&journal->j_checkpoint_mutex);
3339578f05787 (Jan Kara 2012-03-13 22:45:38 -0400 1148) if (tid_gt(tid, journal->j_tail_sequence))
3339578f05787 (Jan Kara 2012-03-13 22:45:38 -0400 1149) __jbd2_update_log_tail(journal, tid, block);
3339578f05787 (Jan Kara 2012-03-13 22:45:38 -0400 1150) mutex_unlock(&journal->j_checkpoint_mutex);
3339578f05787 (Jan Kara 2012-03-13 22:45:38 -0400 1151) }
3339578f05787 (Jan Kara 2012-03-13 22:45:38 -0400 1152)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1153) struct jbd2_stats_proc_session {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1154) journal_t *journal;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1155) struct transaction_stats_s *stats;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1156) int start;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1157) int max;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1158) };
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1159)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1160) static void *jbd2_seq_info_start(struct seq_file *seq, loff_t *pos)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1161) {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1162) return *pos ? NULL : SEQ_START_TOKEN;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1163) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1164)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1165) static void *jbd2_seq_info_next(struct seq_file *seq, void *v, loff_t *pos)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1166) {
1a8e9cf40c9a6 (Vasily Averin 2020-01-23 12:05:10 +0300 1167) (*pos)++;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1168) return NULL;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1169) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1170)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1171) static int jbd2_seq_info_show(struct seq_file *seq, void *v)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1172) {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1173) struct jbd2_stats_proc_session *s = seq->private;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1174)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1175) if (v != SEQ_START_TOKEN)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1176) return 0;
9fff24aa2c5c5 (Theodore Ts'o 2013-02-06 22:30:23 -0500 1177) seq_printf(seq, "%lu transactions (%lu requested), "
9fff24aa2c5c5 (Theodore Ts'o 2013-02-06 22:30:23 -0500 1178) "each up to %u blocks\n",
9fff24aa2c5c5 (Theodore Ts'o 2013-02-06 22:30:23 -0500 1179) s->stats->ts_tid, s->stats->ts_requested,
9fff24aa2c5c5 (Theodore Ts'o 2013-02-06 22:30:23 -0500 1180) s->journal->j_max_transaction_buffers);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1181) if (s->stats->ts_tid == 0)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1182) return 0;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1183) seq_printf(seq, "average: \n %ums waiting for transaction\n",
bf6993276f74d (Theodore Ts'o 2009-09-30 00:32:06 -0400 1184) jiffies_to_msecs(s->stats->run.rs_wait / s->stats->ts_tid));
9fff24aa2c5c5 (Theodore Ts'o 2013-02-06 22:30:23 -0500 1185) seq_printf(seq, " %ums request delay\n",
9fff24aa2c5c5 (Theodore Ts'o 2013-02-06 22:30:23 -0500 1186) (s->stats->ts_requested == 0) ? 0 :
9fff24aa2c5c5 (Theodore Ts'o 2013-02-06 22:30:23 -0500 1187) jiffies_to_msecs(s->stats->run.rs_request_delay /
9fff24aa2c5c5 (Theodore Ts'o 2013-02-06 22:30:23 -0500 1188) s->stats->ts_requested));
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1189) seq_printf(seq, " %ums running transaction\n",
bf6993276f74d (Theodore Ts'o 2009-09-30 00:32:06 -0400 1190) jiffies_to_msecs(s->stats->run.rs_running / s->stats->ts_tid));
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1191) seq_printf(seq, " %ums transaction was being locked\n",
bf6993276f74d (Theodore Ts'o 2009-09-30 00:32:06 -0400 1192) jiffies_to_msecs(s->stats->run.rs_locked / s->stats->ts_tid));
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1193) seq_printf(seq, " %ums flushing data (in ordered mode)\n",
bf6993276f74d (Theodore Ts'o 2009-09-30 00:32:06 -0400 1194) jiffies_to_msecs(s->stats->run.rs_flushing / s->stats->ts_tid));
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1195) seq_printf(seq, " %ums logging transaction\n",
bf6993276f74d (Theodore Ts'o 2009-09-30 00:32:06 -0400 1196) jiffies_to_msecs(s->stats->run.rs_logging / s->stats->ts_tid));
c225aa57ff4ff (Simon Holm Thøgersen 2009-01-11 22:34:01 -0500 1197) seq_printf(seq, " %lluus average transaction commit time\n",
c225aa57ff4ff (Simon Holm Thøgersen 2009-01-11 22:34:01 -0500 1198) div_u64(s->journal->j_average_commit_time, 1000));
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1199) seq_printf(seq, " %lu handles per transaction\n",
bf6993276f74d (Theodore Ts'o 2009-09-30 00:32:06 -0400 1200) s->stats->run.rs_handle_count / s->stats->ts_tid);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1201) seq_printf(seq, " %lu blocks per transaction\n",
bf6993276f74d (Theodore Ts'o 2009-09-30 00:32:06 -0400 1202) s->stats->run.rs_blocks / s->stats->ts_tid);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1203) seq_printf(seq, " %lu logged blocks per transaction\n",
bf6993276f74d (Theodore Ts'o 2009-09-30 00:32:06 -0400 1204) s->stats->run.rs_blocks_logged / s->stats->ts_tid);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1205) return 0;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1206) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1207)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1208) static void jbd2_seq_info_stop(struct seq_file *seq, void *v)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1209) {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1210) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1211)
88e9d34c72788 (James Morris 2009-09-22 16:43:43 -0700 1212) static const struct seq_operations jbd2_seq_info_ops = {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1213) .start = jbd2_seq_info_start,
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1214) .next = jbd2_seq_info_next,
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1215) .stop = jbd2_seq_info_stop,
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1216) .show = jbd2_seq_info_show,
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1217) };
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1218)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1219) static int jbd2_seq_info_open(struct inode *inode, struct file *file)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1220) {
d9dda78bad879 (Al Viro 2013-03-31 18:16:14 -0400 1221) journal_t *journal = PDE_DATA(inode);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1222) struct jbd2_stats_proc_session *s;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1223) int rc, size;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1224)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1225) s = kmalloc(sizeof(*s), GFP_KERNEL);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1226) if (s == NULL)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1227) return -ENOMEM;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1228) size = sizeof(struct transaction_stats_s);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1229) s->stats = kmalloc(size, GFP_KERNEL);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1230) if (s->stats == NULL) {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1231) kfree(s);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1232) return -ENOMEM;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1233) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1234) spin_lock(&journal->j_history_lock);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1235) memcpy(s->stats, &journal->j_stats, size);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1236) s->journal = journal;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1237) spin_unlock(&journal->j_history_lock);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1238)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1239) rc = seq_open(file, &jbd2_seq_info_ops);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1240) if (rc == 0) {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1241) struct seq_file *m = file->private_data;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1242) m->private = s;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1243) } else {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1244) kfree(s->stats);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1245) kfree(s);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1246) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1247) return rc;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1248)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1249) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1250)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1251) static int jbd2_seq_info_release(struct inode *inode, struct file *file)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1252) {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1253) struct seq_file *seq = file->private_data;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1254) struct jbd2_stats_proc_session *s = seq->private;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1255) kfree(s->stats);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1256) kfree(s);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1257) return seq_release(inode, file);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1258) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1259)
97a32539b9568 (Alexey Dobriyan 2020-02-03 17:37:17 -0800 1260) static const struct proc_ops jbd2_info_proc_ops = {
97a32539b9568 (Alexey Dobriyan 2020-02-03 17:37:17 -0800 1261) .proc_open = jbd2_seq_info_open,
97a32539b9568 (Alexey Dobriyan 2020-02-03 17:37:17 -0800 1262) .proc_read = seq_read,
97a32539b9568 (Alexey Dobriyan 2020-02-03 17:37:17 -0800 1263) .proc_lseek = seq_lseek,
97a32539b9568 (Alexey Dobriyan 2020-02-03 17:37:17 -0800 1264) .proc_release = jbd2_seq_info_release,
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1265) };
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1266)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1267) static struct proc_dir_entry *proc_jbd2_stats;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1268)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1269) static void jbd2_stats_proc_init(journal_t *journal)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1270) {
05496769e5da8 (Theodore Ts'o 2008-09-16 14:36:17 -0400 1271) journal->j_proc_entry = proc_mkdir(journal->j_devname, proc_jbd2_stats);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1272) if (journal->j_proc_entry) {
79da3664f6164 (Denis V. Lunev 2008-04-29 01:02:11 -0700 1273) proc_create_data("info", S_IRUGO, journal->j_proc_entry,
97a32539b9568 (Alexey Dobriyan 2020-02-03 17:37:17 -0800 1274) &jbd2_info_proc_ops, journal);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1275) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1276) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1277)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1278) static void jbd2_stats_proc_exit(journal_t *journal)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1279) {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1280) remove_proc_entry("info", journal->j_proc_entry);
05496769e5da8 (Theodore Ts'o 2008-09-16 14:36:17 -0400 1281) remove_proc_entry(journal->j_devname, proc_jbd2_stats);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1282) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1283)
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1284) /* Minimum size of descriptor tag */
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1285) static int jbd2_min_tag_size(void)
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1286) {
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1287) /*
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1288) * Tag with 32-bit block numbers does not use last four bytes of the
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1289) * structure
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1290) */
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1291) return sizeof(journal_block_tag_t) - 4;
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1292) }
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1293)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1294) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1295) * Management for journal control blocks: functions to create and
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1296) * destroy journal_t structures, and to initialise and read existing
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1297) * journal blocks from disk. */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1298)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1299) /* First: create and setup a journal_t object in memory. We initialise
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1300) * very few fields yet: that has to wait until we have created the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1301) * journal structures from from scratch, or loaded them from disk. */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1302)
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1303) static journal_t *journal_init_common(struct block_device *bdev,
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1304) struct block_device *fs_dev,
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1305) unsigned long long start, int len, int blocksize)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1306) {
ab714aff4f744 (Jan Kara 2016-06-30 11:39:38 -0400 1307) static struct lock_class_key jbd2_trans_commit_key;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1308) journal_t *journal;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1309) int err;
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1310) struct buffer_head *bh;
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1311) int n;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1312)
3ebfdf885aced (Andrew Morton 2009-12-23 08:05:15 -0500 1313) journal = kzalloc(sizeof(*journal), GFP_KERNEL);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1314) if (!journal)
b7271b0a39947 (Theodore Ts'o 2010-12-18 13:39:38 -0500 1315) return NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1316)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1317) init_waitqueue_head(&journal->j_wait_transaction_locked);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1318) init_waitqueue_head(&journal->j_wait_done_commit);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1319) init_waitqueue_head(&journal->j_wait_commit);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1320) init_waitqueue_head(&journal->j_wait_updates);
8f7d89f36829b (Jan Kara 2013-06-04 12:35:11 -0400 1321) init_waitqueue_head(&journal->j_wait_reserved);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1322) init_waitqueue_head(&journal->j_fc_wait);
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 1323) mutex_init(&journal->j_abort_mutex);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1324) mutex_init(&journal->j_barrier);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1325) mutex_init(&journal->j_checkpoint_mutex);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1326) spin_lock_init(&journal->j_revoke_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1327) spin_lock_init(&journal->j_list_lock);
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 1328) rwlock_init(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1329)
cd02ff0b14b7e (Mingming Cao 2007-10-16 18:38:25 -0400 1330) journal->j_commit_interval = (HZ * JBD2_DEFAULT_MAX_COMMIT_AGE);
30773840c19ce (Theodore Ts'o 2009-01-03 20:27:38 -0500 1331) journal->j_min_batch_time = 0;
30773840c19ce (Theodore Ts'o 2009-01-03 20:27:38 -0500 1332) journal->j_max_batch_time = 15000; /* 15ms */
8f7d89f36829b (Jan Kara 2013-06-04 12:35:11 -0400 1333) atomic_set(&journal->j_reserved_credits, 0);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1334)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1335) /* The journal is marked for error until we succeed with recovery! */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1336) journal->j_flags = JBD2_ABORT;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1337)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1338) /* Set up a default-sized revoke table for the new mount. */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1339) err = jbd2_journal_init_revoke(journal, JOURNAL_REVOKE_DEFAULT_HASH);
cd9cb405e0b94 (Eric Biggers 2017-03-15 15:08:48 -0400 1340) if (err)
cd9cb405e0b94 (Eric Biggers 2017-03-15 15:08:48 -0400 1341) goto err_cleanup;
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1342)
bf6993276f74d (Theodore Ts'o 2009-09-30 00:32:06 -0400 1343) spin_lock_init(&journal->j_history_lock);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1344)
ab714aff4f744 (Jan Kara 2016-06-30 11:39:38 -0400 1345) lockdep_init_map(&journal->j_trans_commit_map, "jbd2_handle",
ab714aff4f744 (Jan Kara 2016-06-30 11:39:38 -0400 1346) &jbd2_trans_commit_key, 0);
ab714aff4f744 (Jan Kara 2016-06-30 11:39:38 -0400 1347)
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1348) /* journal descriptor can store up to n blocks -bzzz */
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1349) journal->j_blocksize = blocksize;
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1350) journal->j_dev = bdev;
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1351) journal->j_fs_dev = fs_dev;
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1352) journal->j_blk_offset = start;
ede7dc7fa0af6 (Harshad Shirwadkar 2020-11-05 19:58:54 -0800 1353) journal->j_total_len = len;
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1354) /* We need enough buffers to write out full descriptor block. */
b90bfdf581194 (Jan Kara 2019-11-05 17:44:09 +0100 1355) n = journal->j_blocksize / jbd2_min_tag_size();
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1356) journal->j_wbufsize = n;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1357) journal->j_fc_wbuf = NULL;
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1358) journal->j_wbuf = kmalloc_array(n, sizeof(struct buffer_head *),
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1359) GFP_KERNEL);
cd9cb405e0b94 (Eric Biggers 2017-03-15 15:08:48 -0400 1360) if (!journal->j_wbuf)
cd9cb405e0b94 (Eric Biggers 2017-03-15 15:08:48 -0400 1361) goto err_cleanup;
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1362)
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1363) bh = getblk_unmovable(journal->j_dev, start, journal->j_blocksize);
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1364) if (!bh) {
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1365) pr_err("%s: Cannot get buffer for journal superblock\n",
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1366) __func__);
cd9cb405e0b94 (Eric Biggers 2017-03-15 15:08:48 -0400 1367) goto err_cleanup;
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1368) }
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1369) journal->j_sb_buffer = bh;
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1370) journal->j_superblock = (journal_superblock_t *)bh->b_data;
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1371)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1372) return journal;
cd9cb405e0b94 (Eric Biggers 2017-03-15 15:08:48 -0400 1373)
cd9cb405e0b94 (Eric Biggers 2017-03-15 15:08:48 -0400 1374) err_cleanup:
cd9cb405e0b94 (Eric Biggers 2017-03-15 15:08:48 -0400 1375) kfree(journal->j_wbuf);
cd9cb405e0b94 (Eric Biggers 2017-03-15 15:08:48 -0400 1376) jbd2_journal_destroy_revoke(journal);
cd9cb405e0b94 (Eric Biggers 2017-03-15 15:08:48 -0400 1377) kfree(journal);
cd9cb405e0b94 (Eric Biggers 2017-03-15 15:08:48 -0400 1378) return NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1379) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1380)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1381) /* jbd2_journal_init_dev and jbd2_journal_init_inode:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1382) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1383) * Create a journal structure assigned some fixed set of disk blocks to
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1384) * the journal. We don't actually touch those disk blocks yet, but we
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1385) * need to set up all of the mapping information to tell the journaling
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1386) * system where the journal blocks are.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1387) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1388) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1389)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1390) /**
5648ba5b2dc0d (Randy Dunlap 2008-04-17 10:38:59 -0400 1391) * journal_t * jbd2_journal_init_dev() - creates and initialises a journal structure
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1392) * @bdev: Block device on which to create the journal
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1393) * @fs_dev: Device which hold journalled filesystem for this journal.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1394) * @start: Block nr Start of journal.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1395) * @len: Length of the journal in blocks.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1396) * @blocksize: blocksize of journalling device
5648ba5b2dc0d (Randy Dunlap 2008-04-17 10:38:59 -0400 1397) *
5648ba5b2dc0d (Randy Dunlap 2008-04-17 10:38:59 -0400 1398) * Returns: a newly created journal_t *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1399) *
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1400) * jbd2_journal_init_dev creates a journal which maps a fixed contiguous
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1401) * range of blocks on an arbitrary block device.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1402) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1403) */
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1404) journal_t *jbd2_journal_init_dev(struct block_device *bdev,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1405) struct block_device *fs_dev,
18eba7aae080d (Mingming Cao 2006-10-11 01:21:13 -0700 1406) unsigned long long start, int len, int blocksize)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1407) {
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1408) journal_t *journal;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1409)
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1410) journal = journal_init_common(bdev, fs_dev, start, len, blocksize);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1411) if (!journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1412) return NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1413)
0587aa3d11f97 (yangsheng 2010-11-17 21:46:26 -0500 1414) bdevname(journal->j_dev, journal->j_devname);
81ae394bdc473 (Rasmus Villemoes 2015-06-25 15:02:38 -0700 1415) strreplace(journal->j_devname, '/', '!');
4b905671d2ea0 (Jan Kara 2009-01-06 14:53:35 -0500 1416) jbd2_stats_proc_init(journal);
4b905671d2ea0 (Jan Kara 2009-01-06 14:53:35 -0500 1417)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1418) return journal;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1419) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1420)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1421) /**
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1422) * journal_t * jbd2_journal_init_inode () - creates a journal which maps to a inode.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1423) * @inode: An inode to create the journal in
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1424) *
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1425) * jbd2_journal_init_inode creates a journal which maps an on-disk inode as
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1426) * the journal. The inode must exist already, must support bmap() and
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1427) * must have all data blocks preallocated.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1428) */
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1429) journal_t *jbd2_journal_init_inode(struct inode *inode)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1430) {
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1431) journal_t *journal;
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 1432) sector_t blocknr;
05496769e5da8 (Theodore Ts'o 2008-09-16 14:36:17 -0400 1433) char *p;
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 1434) int err = 0;
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 1435)
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 1436) blocknr = 0;
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 1437) err = bmap(inode, &blocknr);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1438)
30460e1ea3e62 (Carlos Maiolino 2020-01-09 14:30:41 +0100 1439) if (err || !blocknr) {
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1440) pr_err("%s: Cannot locate journal superblock\n",
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1441) __func__);
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1442) return NULL;
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1443) }
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1444)
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1445) jbd_debug(1, "JBD2: inode %s/%ld, size %lld, bits %d, blksize %ld\n",
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1446) inode->i_sb->s_id, inode->i_ino, (long long) inode->i_size,
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1447) inode->i_sb->s_blocksize_bits, inode->i_sb->s_blocksize);
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1448)
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1449) journal = journal_init_common(inode->i_sb->s_bdev, inode->i_sb->s_bdev,
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1450) blocknr, inode->i_size >> inode->i_sb->s_blocksize_bits,
f0c9fd5458bac (Geliang Tang 2016-09-15 12:02:32 -0400 1451) inode->i_sb->s_blocksize);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1452) if (!journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1453) return NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1454)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1455) journal->j_inode = inode;
05496769e5da8 (Theodore Ts'o 2008-09-16 14:36:17 -0400 1456) bdevname(journal->j_dev, journal->j_devname);
81ae394bdc473 (Rasmus Villemoes 2015-06-25 15:02:38 -0700 1457) p = strreplace(journal->j_devname, '/', '!');
90576c0b9a0b5 (Theodore Ts'o 2009-09-29 15:51:30 -0400 1458) sprintf(p, "-%lu", journal->j_inode->i_ino);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 1459) jbd2_stats_proc_init(journal);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1460)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1461) return journal;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1462) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1463)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1464) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1465) * If the journal init or create aborts, we need to mark the journal
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1466) * superblock as being NULL to prevent the journal destroy from writing
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1467) * back a bogus superblock.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1468) */
60ed633f51d0c (Xianting Tian 2020-07-18 08:57:37 -0400 1469) static void journal_fail_superblock(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1470) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1471) struct buffer_head *bh = journal->j_sb_buffer;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1472) brelse(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1473) journal->j_sb_buffer = NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1474) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1475)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1476) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1477) * Given a journal_t structure, initialise the various fields for
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1478) * startup of a new journaling session. We use this both when creating
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1479) * a journal, and after recovering an old journal to reset it for
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1480) * subsequent use.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1481) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1482)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1483) static int journal_reset(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1484) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1485) journal_superblock_t *sb = journal->j_superblock;
18eba7aae080d (Mingming Cao 2006-10-11 01:21:13 -0700 1486) unsigned long long first, last;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1487)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1488) first = be32_to_cpu(sb->s_first);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1489) last = be32_to_cpu(sb->s_maxlen);
f6f50e28f0cb8 (Jan Kara 2009-07-17 10:40:01 -0400 1490) if (first + JBD2_MIN_JOURNAL_BLOCKS > last + 1) {
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 1491) printk(KERN_ERR "JBD2: Journal too short (blocks %llu-%llu).\n",
f6f50e28f0cb8 (Jan Kara 2009-07-17 10:40:01 -0400 1492) first, last);
f6f50e28f0cb8 (Jan Kara 2009-07-17 10:40:01 -0400 1493) journal_fail_superblock(journal);
f6f50e28f0cb8 (Jan Kara 2009-07-17 10:40:01 -0400 1494) return -EINVAL;
f6f50e28f0cb8 (Jan Kara 2009-07-17 10:40:01 -0400 1495) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1496)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1497) journal->j_first = first;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1498) journal->j_last = last;
6866d7b3f2bb4 (Harshad Shirwadkar 2020-10-15 13:37:55 -0700 1499)
6866d7b3f2bb4 (Harshad Shirwadkar 2020-10-15 13:37:55 -0700 1500) journal->j_head = journal->j_first;
6866d7b3f2bb4 (Harshad Shirwadkar 2020-10-15 13:37:55 -0700 1501) journal->j_tail = journal->j_first;
6866d7b3f2bb4 (Harshad Shirwadkar 2020-10-15 13:37:55 -0700 1502) journal->j_free = journal->j_last - journal->j_first;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1503)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1504) journal->j_tail_sequence = journal->j_transaction_sequence;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1505) journal->j_commit_sequence = journal->j_transaction_sequence - 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1506) journal->j_commit_request = journal->j_commit_sequence;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1507)
ede7dc7fa0af6 (Harshad Shirwadkar 2020-11-05 19:58:54 -0800 1508) journal->j_max_transaction_buffers = jbd2_journal_get_max_txn_bufs(journal);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1509)
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1510) /*
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1511) * Now that journal recovery is done, turn fast commits off here. This
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1512) * way, if fast commit was enabled before the crash but if now FS has
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1513) * disabled it, we don't enable fast commits.
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1514) */
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1515) jbd2_clear_feature_fast_commit(journal);
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1516)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1517) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1518) * As a special case, if the on-disk copy is already marked as needing
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1519) * no recovery (s_start == 0), then we can safely defer the superblock
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1520) * update until the next commit by setting JBD2_FLUSHED. This avoids
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1521) * attempting a write to a potential-readonly device.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1522) */
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1523) if (sb->s_start == 0) {
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 1524) jbd_debug(1, "JBD2: Skipping superblock update on recovered sb "
7821ce417ec73 (Gaowei Pu 2019-05-30 15:08:34 -0400 1525) "(start %ld, seq %u, errno %d)\n",
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1526) journal->j_tail, journal->j_tail_sequence,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1527) journal->j_errno);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1528) journal->j_flags |= JBD2_FLUSHED;
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1529) } else {
a78bb11d7acd5 (Jan Kara 2012-03-13 15:43:04 -0400 1530) /* Lock here to make assertions happy... */
6fa7aa50b2c48 (Tejun Heo 2016-10-28 12:58:12 -0400 1531) mutex_lock_io(&journal->j_checkpoint_mutex);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1532) /*
70fd76140a6cb (Christoph Hellwig 2016-11-01 07:40:10 -0600 1533) * Update log tail information. We use REQ_FUA since new
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1534) * transaction will start reusing journal space and so we
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1535) * must make sure information about current log tail is on
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1536) * disk before that.
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1537) */
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1538) jbd2_journal_update_sb_log_tail(journal,
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1539) journal->j_tail_sequence,
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1540) journal->j_tail,
17f423b516076 (Jan Kara 2017-05-04 11:01:31 -0400 1541) REQ_SYNC | REQ_FUA);
a78bb11d7acd5 (Jan Kara 2012-03-13 15:43:04 -0400 1542) mutex_unlock(&journal->j_checkpoint_mutex);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1543) }
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1544) return jbd2_journal_start_thread(journal);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1545) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1546)
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 1547) /*
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 1548) * This function expects that the caller will have locked the journal
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 1549) * buffer head, and will return with it unlocked
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 1550) */
2a222ca992c35 (Mike Christie 2016-06-05 14:31:43 -0500 1551) static int jbd2_write_superblock(journal_t *journal, int write_flags)
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1552) {
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1553) struct buffer_head *bh = journal->j_sb_buffer;
fe52d17cdd343 (Theodore Ts'o 2013-07-01 08:12:38 -0400 1554) journal_superblock_t *sb = journal->j_superblock;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1555) int ret;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1556)
742b06b5628f2 (Jiufei Xue 2019-04-06 18:57:40 -0400 1557) /* Buffer got discarded which means block device got invalidated */
ef3f5830b8596 (zhangyi (F) 2020-06-20 14:19:48 +0800 1558) if (!buffer_mapped(bh)) {
ef3f5830b8596 (zhangyi (F) 2020-06-20 14:19:48 +0800 1559) unlock_buffer(bh);
742b06b5628f2 (Jiufei Xue 2019-04-06 18:57:40 -0400 1560) return -EIO;
ef3f5830b8596 (zhangyi (F) 2020-06-20 14:19:48 +0800 1561) }
742b06b5628f2 (Jiufei Xue 2019-04-06 18:57:40 -0400 1562)
2a222ca992c35 (Mike Christie 2016-06-05 14:31:43 -0500 1563) trace_jbd2_write_superblock(journal, write_flags);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1564) if (!(journal->j_flags & JBD2_BARRIER))
28a8f0d317bf2 (Mike Christie 2016-06-05 14:32:25 -0500 1565) write_flags &= ~(REQ_FUA | REQ_PREFLUSH);
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1566) if (buffer_write_io_error(bh)) {
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1567) /*
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1568) * Oh, dear. A previous attempt to write the journal
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1569) * superblock failed. This could happen because the
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1570) * USB device was yanked out. Or it could happen to
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1571) * be a transient write error and maybe the block will
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1572) * be remapped. Nothing we can do but to retry the
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1573) * write and hope for the best.
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1574) */
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1575) printk(KERN_ERR "JBD2: previous I/O error detected "
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1576) "for journal superblock update for %s.\n",
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1577) journal->j_devname);
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1578) clear_buffer_write_io_error(bh);
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1579) set_buffer_uptodate(bh);
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1580) }
a58ca992661a4 (Theodore Ts'o 2019-02-14 16:28:14 -0500 1581) if (jbd2_journal_has_csum_v2or3(journal))
a58ca992661a4 (Theodore Ts'o 2019-02-14 16:28:14 -0500 1582) sb->s_checksum = jbd2_superblock_csum(journal, sb);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1583) get_bh(bh);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1584) bh->b_end_io = end_buffer_write_sync;
2a222ca992c35 (Mike Christie 2016-06-05 14:31:43 -0500 1585) ret = submit_bh(REQ_OP_WRITE, write_flags, bh);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1586) wait_on_buffer(bh);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1587) if (buffer_write_io_error(bh)) {
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1588) clear_buffer_write_io_error(bh);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1589) set_buffer_uptodate(bh);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1590) ret = -EIO;
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1591) }
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1592) if (ret) {
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1593) printk(KERN_ERR "JBD2: Error %d detected when updating "
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1594) "journal superblock for %s.\n", ret,
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1595) journal->j_devname);
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 1596) if (!is_journal_aborted(journal))
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 1597) jbd2_journal_abort(journal, ret);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1598) }
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1599)
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1600) return ret;
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1601) }
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1602)
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1603) /**
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1604) * jbd2_journal_update_sb_log_tail() - Update log tail in journal sb on disk.
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1605) * @journal: The journal to update.
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1606) * @tail_tid: TID of the new transaction at the tail of the log
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1607) * @tail_block: The first block of the transaction at the tail of the log
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1608) * @write_op: With which operation should we write the journal sb
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1609) *
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1610) * Update a journal's superblock information about log tail and write it to
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1611) * disk, waiting for the IO to complete.
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1612) */
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1613) int jbd2_journal_update_sb_log_tail(journal_t *journal, tid_t tail_tid,
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1614) unsigned long tail_block, int write_op)
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1615) {
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1616) journal_superblock_t *sb = journal->j_superblock;
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1617) int ret;
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1618)
85e0c4e89c1b8 (Theodore Ts'o 2018-02-19 12:22:53 -0500 1619) if (is_journal_aborted(journal))
85e0c4e89c1b8 (Theodore Ts'o 2018-02-19 12:22:53 -0500 1620) return -EIO;
85e0c4e89c1b8 (Theodore Ts'o 2018-02-19 12:22:53 -0500 1621)
a78bb11d7acd5 (Jan Kara 2012-03-13 15:43:04 -0400 1622) BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex));
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1623) jbd_debug(1, "JBD2: updating superblock (start %lu, seq %u)\n",
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1624) tail_block, tail_tid);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1625)
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 1626) lock_buffer(journal->j_sb_buffer);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1627) sb->s_sequence = cpu_to_be32(tail_tid);
79feb521a4470 (Jan Kara 2012-03-13 22:22:54 -0400 1628) sb->s_start = cpu_to_be32(tail_block);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1629)
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1630) ret = jbd2_write_superblock(journal, write_op);
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1631) if (ret)
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1632) goto out;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1633)
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1634) /* Log is no longer empty */
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1635) write_lock(&journal->j_state_lock);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1636) WARN_ON(!sb->s_sequence);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1637) journal->j_flags &= ~JBD2_FLUSHED;
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1638) write_unlock(&journal->j_state_lock);
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1639)
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1640) out:
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 1641) return ret;
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1642) }
2201c590dd6e8 (Seiji Aguchi 2012-02-20 17:53:01 -0500 1643)
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1644) /**
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1645) * jbd2_mark_journal_empty() - Mark on disk journal as empty.
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1646) * @journal: The journal to update.
c0a2ad9b50dd8 (OGAWA Hirofumi 2016-03-09 23:47:25 -0500 1647) * @write_op: With which operation should we write the journal sb
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1648) *
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1649) * Update a journal's dynamic superblock fields to show that journal is empty.
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1650) * Write updated superblock to disk waiting for IO to complete.
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1651) */
c0a2ad9b50dd8 (OGAWA Hirofumi 2016-03-09 23:47:25 -0500 1652) static void jbd2_mark_journal_empty(journal_t *journal, int write_op)
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1653) {
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1654) journal_superblock_t *sb = journal->j_superblock;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1655) bool had_fast_commit = false;
914258bf2cb22 (Theodore Ts'o 2008-10-06 21:35:40 -0400 1656)
a78bb11d7acd5 (Jan Kara 2012-03-13 15:43:04 -0400 1657) BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex));
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 1658) lock_buffer(journal->j_sb_buffer);
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 1659) if (sb->s_start == 0) { /* Is it already empty? */
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 1660) unlock_buffer(journal->j_sb_buffer);
eeecef0af5ea4 (Eric Sandeen 2012-08-18 22:29:40 -0400 1661) return;
eeecef0af5ea4 (Eric Sandeen 2012-08-18 22:29:40 -0400 1662) }
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 1663)
7821ce417ec73 (Gaowei Pu 2019-05-30 15:08:34 -0400 1664) jbd_debug(1, "JBD2: Marking journal as empty (seq %u)\n",
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1665) journal->j_tail_sequence);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1666)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1667) sb->s_sequence = cpu_to_be32(journal->j_tail_sequence);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1668) sb->s_start = cpu_to_be32(0);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1669) if (jbd2_has_feature_fast_commit(journal)) {
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1670) /*
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1671) * When journal is clean, no need to commit fast commit flag and
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1672) * make file system incompatible with older kernels.
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1673) */
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1674) jbd2_clear_feature_fast_commit(journal);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1675) had_fast_commit = true;
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1676) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1677)
c0a2ad9b50dd8 (OGAWA Hirofumi 2016-03-09 23:47:25 -0500 1678) jbd2_write_superblock(journal, write_op);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1679)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1680) if (had_fast_commit)
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1681) jbd2_set_feature_fast_commit(journal);
ff780b91efe90 (Harshad Shirwadkar 2020-10-15 13:37:56 -0700 1682)
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1683) /* Log is no longer empty */
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 1684) write_lock(&journal->j_state_lock);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1685) journal->j_flags |= JBD2_FLUSHED;
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 1686) write_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1687) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1688)
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1689)
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1690) /**
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1691) * jbd2_journal_update_sb_errno() - Update error in the journal.
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1692) * @journal: The journal to update.
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1693) *
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1694) * Update a journal's errno. Write updated superblock to disk waiting for IO
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1695) * to complete.
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1696) */
d796c52ef0b71 (Theodore Ts'o 2012-08-05 19:04:57 -0400 1697) void jbd2_journal_update_sb_errno(journal_t *journal)
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1698) {
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1699) journal_superblock_t *sb = journal->j_superblock;
fb7c02445c497 (Theodore Ts'o 2018-02-18 23:45:18 -0500 1700) int errcode;
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1701)
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 1702) lock_buffer(journal->j_sb_buffer);
fb7c02445c497 (Theodore Ts'o 2018-02-18 23:45:18 -0500 1703) errcode = journal->j_errno;
fb7c02445c497 (Theodore Ts'o 2018-02-18 23:45:18 -0500 1704) if (errcode == -ESHUTDOWN)
fb7c02445c497 (Theodore Ts'o 2018-02-18 23:45:18 -0500 1705) errcode = 0;
fb7c02445c497 (Theodore Ts'o 2018-02-18 23:45:18 -0500 1706) jbd_debug(1, "JBD2: updating superblock error (errno %d)\n", errcode);
fb7c02445c497 (Theodore Ts'o 2018-02-18 23:45:18 -0500 1707) sb->s_errno = cpu_to_be32(errcode);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1708)
17f423b516076 (Jan Kara 2017-05-04 11:01:31 -0400 1709) jbd2_write_superblock(journal, REQ_SYNC | REQ_FUA);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1710) }
d796c52ef0b71 (Theodore Ts'o 2012-08-05 19:04:57 -0400 1711) EXPORT_SYMBOL(jbd2_journal_update_sb_errno);
24bcc89c7e7c6 (Jan Kara 2012-03-13 15:41:04 -0400 1712)
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1713) static int journal_revoke_records_per_block(journal_t *journal)
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1714) {
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1715) int record_size;
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1716) int space = journal->j_blocksize - sizeof(jbd2_journal_revoke_header_t);
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1717)
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1718) if (jbd2_has_feature_64bit(journal))
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1719) record_size = 8;
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1720) else
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1721) record_size = 4;
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1722)
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1723) if (jbd2_journal_has_csum_v2or3(journal))
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1724) space -= sizeof(struct jbd2_journal_block_tail);
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1725) return space / record_size;
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1726) }
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1727)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1728) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1729) * Read the superblock for a given journal, performing initial
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1730) * validation of the format.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1731) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1732) static int journal_get_superblock(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1733) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1734) struct buffer_head *bh;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1735) journal_superblock_t *sb;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1736) int err = -EIO;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1737)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1738) bh = journal->j_sb_buffer;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1739)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1740) J_ASSERT(bh != NULL);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1741) if (!buffer_uptodate(bh)) {
dfec8a14fc904 (Mike Christie 2016-06-05 14:31:44 -0500 1742) ll_rw_block(REQ_OP_READ, 0, 1, &bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1743) wait_on_buffer(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1744) if (!buffer_uptodate(bh)) {
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 1745) printk(KERN_ERR
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 1746) "JBD2: IO error reading journal superblock\n");
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1747) goto out;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1748) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1749) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1750)
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 1751) if (buffer_verified(bh))
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 1752) return 0;
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 1753)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1754) sb = journal->j_superblock;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1755)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1756) err = -EINVAL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1757)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1758) if (sb->s_header.h_magic != cpu_to_be32(JBD2_MAGIC_NUMBER) ||
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1759) sb->s_blocksize != cpu_to_be32(journal->j_blocksize)) {
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 1760) printk(KERN_WARNING "JBD2: no valid journal superblock found\n");
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1761) goto out;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1762) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1763)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1764) switch(be32_to_cpu(sb->s_header.h_blocktype)) {
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1765) case JBD2_SUPERBLOCK_V1:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1766) journal->j_format_version = 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1767) break;
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1768) case JBD2_SUPERBLOCK_V2:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1769) journal->j_format_version = 2;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1770) break;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1771) default:
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 1772) printk(KERN_WARNING "JBD2: unrecognised superblock format ID\n");
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1773) goto out;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1774) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1775)
ede7dc7fa0af6 (Harshad Shirwadkar 2020-11-05 19:58:54 -0800 1776) if (be32_to_cpu(sb->s_maxlen) < journal->j_total_len)
ede7dc7fa0af6 (Harshad Shirwadkar 2020-11-05 19:58:54 -0800 1777) journal->j_total_len = be32_to_cpu(sb->s_maxlen);
ede7dc7fa0af6 (Harshad Shirwadkar 2020-11-05 19:58:54 -0800 1778) else if (be32_to_cpu(sb->s_maxlen) > journal->j_total_len) {
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 1779) printk(KERN_WARNING "JBD2: journal file too short\n");
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1780) goto out;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1781) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1782)
8762202dd0d6e (Eryu Guan 2011-11-01 19:04:59 -0400 1783) if (be32_to_cpu(sb->s_first) == 0 ||
ede7dc7fa0af6 (Harshad Shirwadkar 2020-11-05 19:58:54 -0800 1784) be32_to_cpu(sb->s_first) >= journal->j_total_len) {
8762202dd0d6e (Eryu Guan 2011-11-01 19:04:59 -0400 1785) printk(KERN_WARNING
8762202dd0d6e (Eryu Guan 2011-11-01 19:04:59 -0400 1786) "JBD2: Invalid start block of journal: %u\n",
8762202dd0d6e (Eryu Guan 2011-11-01 19:04:59 -0400 1787) be32_to_cpu(sb->s_first));
8762202dd0d6e (Eryu Guan 2011-11-01 19:04:59 -0400 1788) goto out;
8762202dd0d6e (Eryu Guan 2011-11-01 19:04:59 -0400 1789) }
8762202dd0d6e (Eryu Guan 2011-11-01 19:04:59 -0400 1790)
56316a0d28f25 (Darrick J. Wong 2015-10-17 16:18:45 -0400 1791) if (jbd2_has_feature_csum2(journal) &&
56316a0d28f25 (Darrick J. Wong 2015-10-17 16:18:45 -0400 1792) jbd2_has_feature_csum3(journal)) {
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 1793) /* Can't have checksum v2 and v3 at the same time! */
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 1794) printk(KERN_ERR "JBD2: Can't enable checksumming v2 and v3 "
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 1795) "at the same time!\n");
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 1796) goto out;
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 1797) }
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 1798)
8595798ca34d1 (Darrick J. Wong 2015-10-15 10:30:36 -0400 1799) if (jbd2_journal_has_csum_v2or3_feature(journal) &&
56316a0d28f25 (Darrick J. Wong 2015-10-17 16:18:45 -0400 1800) jbd2_has_feature_checksum(journal)) {
feb8c6d3dd0f2 (Darrick J. Wong 2014-09-11 11:38:21 -0400 1801) /* Can't have checksum v1 and v2 on at the same time! */
feb8c6d3dd0f2 (Darrick J. Wong 2014-09-11 11:38:21 -0400 1802) printk(KERN_ERR "JBD2: Can't enable checksumming v1 and v2/3 "
feb8c6d3dd0f2 (Darrick J. Wong 2014-09-11 11:38:21 -0400 1803) "at the same time!\n");
feb8c6d3dd0f2 (Darrick J. Wong 2014-09-11 11:38:21 -0400 1804) goto out;
feb8c6d3dd0f2 (Darrick J. Wong 2014-09-11 11:38:21 -0400 1805) }
feb8c6d3dd0f2 (Darrick J. Wong 2014-09-11 11:38:21 -0400 1806)
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 1807) if (!jbd2_verify_csum_type(journal, sb)) {
a67c848a8b9aa (Dmitry Monakhov 2013-12-08 21:14:59 -0500 1808) printk(KERN_ERR "JBD2: Unknown checksum type\n");
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 1809) goto out;
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 1810) }
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 1811)
01b5adcebb977 (Darrick J. Wong 2012-05-27 07:50:56 -0400 1812) /* Load the checksum driver */
8595798ca34d1 (Darrick J. Wong 2015-10-15 10:30:36 -0400 1813) if (jbd2_journal_has_csum_v2or3_feature(journal)) {
01b5adcebb977 (Darrick J. Wong 2012-05-27 07:50:56 -0400 1814) journal->j_chksum_driver = crypto_alloc_shash("crc32c", 0, 0);
01b5adcebb977 (Darrick J. Wong 2012-05-27 07:50:56 -0400 1815) if (IS_ERR(journal->j_chksum_driver)) {
a67c848a8b9aa (Dmitry Monakhov 2013-12-08 21:14:59 -0500 1816) printk(KERN_ERR "JBD2: Cannot load crc32c driver.\n");
01b5adcebb977 (Darrick J. Wong 2012-05-27 07:50:56 -0400 1817) err = PTR_ERR(journal->j_chksum_driver);
01b5adcebb977 (Darrick J. Wong 2012-05-27 07:50:56 -0400 1818) journal->j_chksum_driver = NULL;
01b5adcebb977 (Darrick J. Wong 2012-05-27 07:50:56 -0400 1819) goto out;
01b5adcebb977 (Darrick J. Wong 2012-05-27 07:50:56 -0400 1820) }
01b5adcebb977 (Darrick J. Wong 2012-05-27 07:50:56 -0400 1821) }
01b5adcebb977 (Darrick J. Wong 2012-05-27 07:50:56 -0400 1822)
a58ca992661a4 (Theodore Ts'o 2019-02-14 16:28:14 -0500 1823) if (jbd2_journal_has_csum_v2or3(journal)) {
a58ca992661a4 (Theodore Ts'o 2019-02-14 16:28:14 -0500 1824) /* Check superblock checksum */
a58ca992661a4 (Theodore Ts'o 2019-02-14 16:28:14 -0500 1825) if (sb->s_checksum != jbd2_superblock_csum(journal, sb)) {
a58ca992661a4 (Theodore Ts'o 2019-02-14 16:28:14 -0500 1826) printk(KERN_ERR "JBD2: journal checksum error\n");
a58ca992661a4 (Theodore Ts'o 2019-02-14 16:28:14 -0500 1827) err = -EFSBADCRC;
a58ca992661a4 (Theodore Ts'o 2019-02-14 16:28:14 -0500 1828) goto out;
a58ca992661a4 (Theodore Ts'o 2019-02-14 16:28:14 -0500 1829) }
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 1830)
a58ca992661a4 (Theodore Ts'o 2019-02-14 16:28:14 -0500 1831) /* Precompute checksum seed for all metadata */
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 1832) journal->j_csum_seed = jbd2_chksum(journal, ~0, sb->s_uuid,
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 1833) sizeof(sb->s_uuid));
a58ca992661a4 (Theodore Ts'o 2019-02-14 16:28:14 -0500 1834) }
4fd5ea43bc116 (Darrick J. Wong 2012-05-27 08:08:22 -0400 1835)
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1836) journal->j_revoke_records_per_block =
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 1837) journal_revoke_records_per_block(journal);
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 1838) set_buffer_verified(bh);
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 1839)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1840) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1841)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1842) out:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1843) journal_fail_superblock(journal);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1844) return err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1845) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1846)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1847) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1848) * Load the on-disk journal superblock and read the key fields into the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1849) * journal_t.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1850) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1851)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1852) static int load_superblock(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1853) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1854) int err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1855) journal_superblock_t *sb;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1856) int num_fc_blocks;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1857)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1858) err = journal_get_superblock(journal);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1859) if (err)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1860) return err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1861)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1862) sb = journal->j_superblock;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1863)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1864) journal->j_tail_sequence = be32_to_cpu(sb->s_sequence);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1865) journal->j_tail = be32_to_cpu(sb->s_start);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1866) journal->j_first = be32_to_cpu(sb->s_first);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1867) journal->j_errno = be32_to_cpu(sb->s_errno);
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1868) journal->j_last = be32_to_cpu(sb->s_maxlen);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1869)
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1870) if (jbd2_has_feature_fast_commit(journal)) {
6866d7b3f2bb4 (Harshad Shirwadkar 2020-10-15 13:37:55 -0700 1871) journal->j_fc_last = be32_to_cpu(sb->s_maxlen);
9bd23c31f392b (Harshad Shirwadkar 2020-11-20 12:22:32 -0800 1872) num_fc_blocks = jbd2_journal_get_num_fc_blks(sb);
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1873) if (journal->j_last - num_fc_blocks >= JBD2_MIN_JOURNAL_BLOCKS)
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 1874) journal->j_last = journal->j_fc_last - num_fc_blocks;
6866d7b3f2bb4 (Harshad Shirwadkar 2020-10-15 13:37:55 -0700 1875) journal->j_fc_first = journal->j_last + 1;
6866d7b3f2bb4 (Harshad Shirwadkar 2020-10-15 13:37:55 -0700 1876) journal->j_fc_off = 0;
6866d7b3f2bb4 (Harshad Shirwadkar 2020-10-15 13:37:55 -0700 1877) }
6866d7b3f2bb4 (Harshad Shirwadkar 2020-10-15 13:37:55 -0700 1878)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1879) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1880) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1881)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1882)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1883) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 1884) * jbd2_journal_load() - Read journal from disk.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1885) * @journal: Journal to act on.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1886) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1887) * Given a journal_t structure which tells us which disk blocks contain
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1888) * a journal, read the journal from disk to initialise the in-memory
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1889) * structures.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1890) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1891) int jbd2_journal_load(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1892) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1893) int err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1894) journal_superblock_t *sb;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1895)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1896) err = load_superblock(journal);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1897) if (err)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1898) return err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1899)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1900) sb = journal->j_superblock;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1901) /* If this is a V2 superblock, then we have to check the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1902) * features flags on it. */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1903)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1904) if (journal->j_format_version >= 2) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1905) if ((sb->s_feature_ro_compat &
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1906) ~cpu_to_be32(JBD2_KNOWN_ROCOMPAT_FEATURES)) ||
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1907) (sb->s_feature_incompat &
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1908) ~cpu_to_be32(JBD2_KNOWN_INCOMPAT_FEATURES))) {
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 1909) printk(KERN_WARNING
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 1910) "JBD2: Unrecognised features on journal\n");
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1911) return -EINVAL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1912) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1913) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1914)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 1915) /*
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 1916) * Create a slab for this blocksize
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 1917) */
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 1918) err = jbd2_journal_create_slab(be32_to_cpu(sb->s_blocksize));
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 1919) if (err)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 1920) return err;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 1921)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1922) /* Let the recovery code check whether it needs to recover any
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1923) * data from the journal. */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1924) if (jbd2_journal_recover(journal))
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1925) goto recovery_error;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1926)
e6a47428de84e (Theodore Ts'o 2009-11-15 15:31:37 -0500 1927) if (journal->j_failed_commit) {
e6a47428de84e (Theodore Ts'o 2009-11-15 15:31:37 -0500 1928) printk(KERN_ERR "JBD2: journal transaction %u on %s "
e6a47428de84e (Theodore Ts'o 2009-11-15 15:31:37 -0500 1929) "is corrupt.\n", journal->j_failed_commit,
e6a47428de84e (Theodore Ts'o 2009-11-15 15:31:37 -0500 1930) journal->j_devname);
6a797d2737838 (Darrick J. Wong 2015-10-17 16:16:04 -0400 1931) return -EFSCORRUPTED;
e6a47428de84e (Theodore Ts'o 2009-11-15 15:31:37 -0500 1932) }
a09decff5c320 (Kai Li 2020-01-11 10:25:42 +0800 1933) /*
a09decff5c320 (Kai Li 2020-01-11 10:25:42 +0800 1934) * clear JBD2_ABORT flag initialized in journal_init_common
a09decff5c320 (Kai Li 2020-01-11 10:25:42 +0800 1935) * here to update log tail information with the newest seq.
a09decff5c320 (Kai Li 2020-01-11 10:25:42 +0800 1936) */
a09decff5c320 (Kai Li 2020-01-11 10:25:42 +0800 1937) journal->j_flags &= ~JBD2_ABORT;
e6a47428de84e (Theodore Ts'o 2009-11-15 15:31:37 -0500 1938)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1939) /* OK, we've finished with the dynamic journal bits:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1940) * reinitialise the dynamic contents of the superblock in memory
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1941) * and reset them on disk. */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1942) if (journal_reset(journal))
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1943) goto recovery_error;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1944)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1945) journal->j_flags |= JBD2_LOADED;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1946) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1947)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1948) recovery_error:
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 1949) printk(KERN_WARNING "JBD2: recovery failed\n");
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1950) return -EIO;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1951) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1952)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1953) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 1954) * jbd2_journal_destroy() - Release a journal_t structure.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1955) * @journal: Journal to act on.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1956) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1957) * Release a journal_t structure once it is no longer in use by the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1958) * journaled object.
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 1959) * Return <0 if we couldn't clean up the journal.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1960) */
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 1961) int jbd2_journal_destroy(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1962) {
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 1963) int err = 0;
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 1964)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1965) /* Wait for the commit thread to wake up and die. */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1966) journal_kill_thread(journal);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1967)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1968) /* Force a final log commit */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1969) if (journal->j_running_transaction)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 1970) jbd2_journal_commit_transaction(journal);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1971)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1972) /* Force any old transactions to disk */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1973)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1974) /* Totally anal locking here... */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1975) spin_lock(&journal->j_list_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1976) while (journal->j_checkpoint_transactions != NULL) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1977) spin_unlock(&journal->j_list_lock);
6fa7aa50b2c48 (Tejun Heo 2016-10-28 12:58:12 -0400 1978) mutex_lock_io(&journal->j_checkpoint_mutex);
841df7df19623 (Jan Kara 2015-07-28 14:57:14 -0400 1979) err = jbd2_log_do_checkpoint(journal);
1a0d3786dd57d (Theodore Ts'o 2008-11-05 00:09:22 -0500 1980) mutex_unlock(&journal->j_checkpoint_mutex);
841df7df19623 (Jan Kara 2015-07-28 14:57:14 -0400 1981) /*
841df7df19623 (Jan Kara 2015-07-28 14:57:14 -0400 1982) * If checkpointing failed, just free the buffers to avoid
841df7df19623 (Jan Kara 2015-07-28 14:57:14 -0400 1983) * looping forever
841df7df19623 (Jan Kara 2015-07-28 14:57:14 -0400 1984) */
841df7df19623 (Jan Kara 2015-07-28 14:57:14 -0400 1985) if (err) {
841df7df19623 (Jan Kara 2015-07-28 14:57:14 -0400 1986) jbd2_journal_destroy_checkpoint(journal);
841df7df19623 (Jan Kara 2015-07-28 14:57:14 -0400 1987) spin_lock(&journal->j_list_lock);
841df7df19623 (Jan Kara 2015-07-28 14:57:14 -0400 1988) break;
841df7df19623 (Jan Kara 2015-07-28 14:57:14 -0400 1989) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1990) spin_lock(&journal->j_list_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1991) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1992)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1993) J_ASSERT(journal->j_running_transaction == NULL);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1994) J_ASSERT(journal->j_committing_transaction == NULL);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1995) J_ASSERT(journal->j_checkpoint_transactions == NULL);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1996) spin_unlock(&journal->j_list_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1997)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 1998) if (journal->j_sb_buffer) {
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 1999) if (!is_journal_aborted(journal)) {
6fa7aa50b2c48 (Tejun Heo 2016-10-28 12:58:12 -0400 2000) mutex_lock_io(&journal->j_checkpoint_mutex);
c0a2ad9b50dd8 (OGAWA Hirofumi 2016-03-09 23:47:25 -0500 2001)
c0a2ad9b50dd8 (OGAWA Hirofumi 2016-03-09 23:47:25 -0500 2002) write_lock(&journal->j_state_lock);
c0a2ad9b50dd8 (OGAWA Hirofumi 2016-03-09 23:47:25 -0500 2003) journal->j_tail_sequence =
c0a2ad9b50dd8 (OGAWA Hirofumi 2016-03-09 23:47:25 -0500 2004) ++journal->j_transaction_sequence;
c0a2ad9b50dd8 (OGAWA Hirofumi 2016-03-09 23:47:25 -0500 2005) write_unlock(&journal->j_state_lock);
c0a2ad9b50dd8 (OGAWA Hirofumi 2016-03-09 23:47:25 -0500 2006)
70fd76140a6cb (Christoph Hellwig 2016-11-01 07:40:10 -0600 2007) jbd2_mark_journal_empty(journal,
17f423b516076 (Jan Kara 2017-05-04 11:01:31 -0400 2008) REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
a78bb11d7acd5 (Jan Kara 2012-03-13 15:43:04 -0400 2009) mutex_unlock(&journal->j_checkpoint_mutex);
a78bb11d7acd5 (Jan Kara 2012-03-13 15:43:04 -0400 2010) } else
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 2011) err = -EIO;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2012) brelse(journal->j_sb_buffer);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2013) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2014)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2015) if (journal->j_proc_entry)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2016) jbd2_stats_proc_exit(journal);
d9f39d1e44c43 (Theodore Ts'o 2014-11-25 20:02:37 -0500 2017) iput(journal->j_inode);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2018) if (journal->j_revoke)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2019) jbd2_journal_destroy_revoke(journal);
01b5adcebb977 (Darrick J. Wong 2012-05-27 07:50:56 -0400 2020) if (journal->j_chksum_driver)
01b5adcebb977 (Darrick J. Wong 2012-05-27 07:50:56 -0400 2021) crypto_free_shash(journal->j_chksum_driver);
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2022) kfree(journal->j_fc_wbuf);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2023) kfree(journal->j_wbuf);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2024) kfree(journal);
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 2025)
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 2026) return err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2027) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2028)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2029)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2030) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 2031) * jbd2_journal_check_used_features() - Check if features specified are used.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2032) * @journal: Journal to check.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2033) * @compat: bitmask of compatible features
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2034) * @ro: bitmask of features that force read-only mount
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2035) * @incompat: bitmask of incompatible features
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2036) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2037) * Check whether the journal uses all of a given set of
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2038) * features. Return true (non-zero) if it does.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2039) **/
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2040)
60ed633f51d0c (Xianting Tian 2020-07-18 08:57:37 -0400 2041) int jbd2_journal_check_used_features(journal_t *journal, unsigned long compat,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2042) unsigned long ro, unsigned long incompat)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2043) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2044) journal_superblock_t *sb;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2045)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2046) if (!compat && !ro && !incompat)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2047) return 1;
1113e1b504f6e (Patrick J. LoPresti 2010-07-22 15:04:16 -0700 2048) /* Load journal superblock if it is not loaded yet. */
1113e1b504f6e (Patrick J. LoPresti 2010-07-22 15:04:16 -0700 2049) if (journal->j_format_version == 0 &&
1113e1b504f6e (Patrick J. LoPresti 2010-07-22 15:04:16 -0700 2050) journal_get_superblock(journal) != 0)
1113e1b504f6e (Patrick J. LoPresti 2010-07-22 15:04:16 -0700 2051) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2052) if (journal->j_format_version == 1)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2053) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2054)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2055) sb = journal->j_superblock;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2056)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2057) if (((be32_to_cpu(sb->s_feature_compat) & compat) == compat) &&
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2058) ((be32_to_cpu(sb->s_feature_ro_compat) & ro) == ro) &&
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2059) ((be32_to_cpu(sb->s_feature_incompat) & incompat) == incompat))
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2060) return 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2061)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2062) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2063) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2064)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2065) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 2066) * jbd2_journal_check_available_features() - Check feature set in journalling layer
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2067) * @journal: Journal to check.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2068) * @compat: bitmask of compatible features
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2069) * @ro: bitmask of features that force read-only mount
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2070) * @incompat: bitmask of incompatible features
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2071) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2072) * Check whether the journaling code supports the use of
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2073) * all of a given set of features on this journal. Return true
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2074) * (non-zero) if it can. */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2075)
60ed633f51d0c (Xianting Tian 2020-07-18 08:57:37 -0400 2076) int jbd2_journal_check_available_features(journal_t *journal, unsigned long compat,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2077) unsigned long ro, unsigned long incompat)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2078) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2079) if (!compat && !ro && !incompat)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2080) return 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2081)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2082) /* We can support any known requested features iff the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2083) * superblock is in version 2. Otherwise we fail to support any
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2084) * extended sb features. */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2085)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2086) if (journal->j_format_version != 2)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2087) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2088)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2089) if ((compat & JBD2_KNOWN_COMPAT_FEATURES) == compat &&
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2090) (ro & JBD2_KNOWN_ROCOMPAT_FEATURES) == ro &&
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2091) (incompat & JBD2_KNOWN_INCOMPAT_FEATURES) == incompat)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2092) return 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2093)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2094) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2095) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2096)
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2097) static int
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2098) jbd2_journal_initialize_fast_commit(journal_t *journal)
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2099) {
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2100) journal_superblock_t *sb = journal->j_superblock;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2101) unsigned long long num_fc_blks;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2102)
9bd23c31f392b (Harshad Shirwadkar 2020-11-20 12:22:32 -0800 2103) num_fc_blks = jbd2_journal_get_num_fc_blks(sb);
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2104) if (journal->j_last - num_fc_blks < JBD2_MIN_JOURNAL_BLOCKS)
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2105) return -ENOSPC;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2106)
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2107) /* Are we called twice? */
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2108) WARN_ON(journal->j_fc_wbuf != NULL);
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2109) journal->j_fc_wbuf = kmalloc_array(num_fc_blks,
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2110) sizeof(struct buffer_head *), GFP_KERNEL);
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2111) if (!journal->j_fc_wbuf)
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2112) return -ENOMEM;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2113)
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2114) journal->j_fc_wbufsize = num_fc_blks;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2115) journal->j_fc_last = journal->j_last;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2116) journal->j_last = journal->j_fc_last - num_fc_blks;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2117) journal->j_fc_first = journal->j_last + 1;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2118) journal->j_fc_off = 0;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2119) journal->j_free = journal->j_last - journal->j_first;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2120) journal->j_max_transaction_buffers =
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2121) jbd2_journal_get_max_txn_bufs(journal);
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2122)
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2123) return 0;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2124) }
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2125)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2126) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 2127) * jbd2_journal_set_features() - Mark a given journal feature in the superblock
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2128) * @journal: Journal to act on.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2129) * @compat: bitmask of compatible features
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2130) * @ro: bitmask of features that force read-only mount
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2131) * @incompat: bitmask of incompatible features
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2132) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2133) * Mark a given journal feature as present on the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2134) * superblock. Returns true if the requested features could be set.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2135) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2136) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2137)
60ed633f51d0c (Xianting Tian 2020-07-18 08:57:37 -0400 2138) int jbd2_journal_set_features(journal_t *journal, unsigned long compat,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2139) unsigned long ro, unsigned long incompat)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2140) {
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2141) #define INCOMPAT_FEATURE_ON(f) \
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2142) ((incompat & (f)) && !(sb->s_feature_incompat & cpu_to_be32(f)))
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2143) #define COMPAT_FEATURE_ON(f) \
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2144) ((compat & (f)) && !(sb->s_feature_compat & cpu_to_be32(f)))
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2145) journal_superblock_t *sb;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2146)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2147) if (jbd2_journal_check_used_features(journal, compat, ro, incompat))
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2148) return 1;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2149)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2150) if (!jbd2_journal_check_available_features(journal, compat, ro, incompat))
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2151) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2152)
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2153) /* If enabling v2 checksums, turn on v3 instead */
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2154) if (incompat & JBD2_FEATURE_INCOMPAT_CSUM_V2) {
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2155) incompat &= ~JBD2_FEATURE_INCOMPAT_CSUM_V2;
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2156) incompat |= JBD2_FEATURE_INCOMPAT_CSUM_V3;
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2157) }
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2158)
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2159) /* Asking for checksumming v3 and v1? Only give them v3. */
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2160) if (incompat & JBD2_FEATURE_INCOMPAT_CSUM_V3 &&
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2161) compat & JBD2_FEATURE_COMPAT_CHECKSUM)
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2162) compat &= ~JBD2_FEATURE_COMPAT_CHECKSUM;
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2163)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2164) jbd_debug(1, "Setting new features 0x%lx/0x%lx/0x%lx\n",
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2165) compat, ro, incompat);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2166)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2167) sb = journal->j_superblock;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2168)
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2169) if (incompat & JBD2_FEATURE_INCOMPAT_FAST_COMMIT) {
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2170) if (jbd2_journal_initialize_fast_commit(journal)) {
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2171) pr_err("JBD2: Cannot enable fast commits.\n");
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2172) return 0;
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2173) }
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2174) }
a1e5e465b31d6 (Harshad Shirwadkar 2020-11-05 19:58:55 -0800 2175)
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2176) /* Load the checksum driver if necessary */
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2177) if ((journal->j_chksum_driver == NULL) &&
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2178) INCOMPAT_FEATURE_ON(JBD2_FEATURE_INCOMPAT_CSUM_V3)) {
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2179) journal->j_chksum_driver = crypto_alloc_shash("crc32c", 0, 0);
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2180) if (IS_ERR(journal->j_chksum_driver)) {
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2181) printk(KERN_ERR "JBD2: Cannot load crc32c driver.\n");
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2182) journal->j_chksum_driver = NULL;
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2183) return 0;
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2184) }
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2185) /* Precompute checksum seed for all metadata */
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2186) journal->j_csum_seed = jbd2_chksum(journal, ~0, sb->s_uuid,
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2187) sizeof(sb->s_uuid));
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2188) }
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2189)
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2190) lock_buffer(journal->j_sb_buffer);
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2191)
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2192) /* If enabling v3 checksums, update superblock */
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2193) if (INCOMPAT_FEATURE_ON(JBD2_FEATURE_INCOMPAT_CSUM_V3)) {
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2194) sb->s_checksum_type = JBD2_CRC32C_CHKSUM;
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2195) sb->s_feature_compat &=
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2196) ~cpu_to_be32(JBD2_FEATURE_COMPAT_CHECKSUM);
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2197) }
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2198)
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2199) /* If enabling v1 checksums, downgrade superblock */
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2200) if (COMPAT_FEATURE_ON(JBD2_FEATURE_COMPAT_CHECKSUM))
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2201) sb->s_feature_incompat &=
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2202) ~cpu_to_be32(JBD2_FEATURE_INCOMPAT_CSUM_V2 |
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2203) JBD2_FEATURE_INCOMPAT_CSUM_V3);
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2204)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2205) sb->s_feature_compat |= cpu_to_be32(compat);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2206) sb->s_feature_ro_compat |= cpu_to_be32(ro);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2207) sb->s_feature_incompat |= cpu_to_be32(incompat);
538bcaa6261b7 (Theodore Ts'o 2019-02-14 16:27:14 -0500 2208) unlock_buffer(journal->j_sb_buffer);
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 2209) journal->j_revoke_records_per_block =
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 2210) journal_revoke_records_per_block(journal);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2211)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2212) return 1;
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2213) #undef COMPAT_FEATURE_ON
25ed6e8a54df9 (Darrick J. Wong 2012-05-27 07:48:56 -0400 2214) #undef INCOMPAT_FEATURE_ON
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2215) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2216)
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2217) /*
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 2218) * jbd2_journal_clear_features() - Clear a given journal feature in the
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2219) * superblock
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2220) * @journal: Journal to act on.
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2221) * @compat: bitmask of compatible features
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2222) * @ro: bitmask of features that force read-only mount
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2223) * @incompat: bitmask of incompatible features
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2224) *
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2225) * Clear a given journal feature as present on the
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2226) * superblock.
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2227) */
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2228) void jbd2_journal_clear_features(journal_t *journal, unsigned long compat,
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2229) unsigned long ro, unsigned long incompat)
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2230) {
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2231) journal_superblock_t *sb;
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2232)
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2233) jbd_debug(1, "Clear features 0x%lx/0x%lx/0x%lx\n",
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2234) compat, ro, incompat);
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2235)
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2236) sb = journal->j_superblock;
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2237)
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2238) sb->s_feature_compat &= ~cpu_to_be32(compat);
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2239) sb->s_feature_ro_compat &= ~cpu_to_be32(ro);
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2240) sb->s_feature_incompat &= ~cpu_to_be32(incompat);
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 2241) journal->j_revoke_records_per_block =
fdc3ef882a5d5 (Jan Kara 2019-11-05 17:44:26 +0100 2242) journal_revoke_records_per_block(journal);
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2243) }
818d276ceb83a (Girish Shilamkar 2008-01-28 23:58:27 -0500 2244) EXPORT_SYMBOL(jbd2_journal_clear_features);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2245)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2246) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 2247) * jbd2_journal_flush() - Flush journal
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2248) * @journal: Journal to act on.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2249) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2250) * Flush all data for a given journal to disk and empty the journal.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2251) * Filesystems can use this when remounting readonly to ensure that
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2252) * recovery does not need to happen on remount.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2253) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2254)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2255) int jbd2_journal_flush(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2256) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2257) int err = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2258) transaction_t *transaction = NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2259)
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 2260) write_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2261)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2262) /* Force everything buffered to the log... */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2263) if (journal->j_running_transaction) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2264) transaction = journal->j_running_transaction;
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2265) __jbd2_log_start_commit(journal, transaction->t_tid);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2266) } else if (journal->j_committing_transaction)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2267) transaction = journal->j_committing_transaction;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2268)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2269) /* Wait for the log commit to complete... */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2270) if (transaction) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2271) tid_t tid = transaction->t_tid;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2272)
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 2273) write_unlock(&journal->j_state_lock);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2274) jbd2_log_wait_commit(journal, tid);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2275) } else {
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 2276) write_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2277) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2278)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2279) /* ...and flush everything in the log out to disk. */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2280) spin_lock(&journal->j_list_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2281) while (!err && journal->j_checkpoint_transactions != NULL) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2282) spin_unlock(&journal->j_list_lock);
6fa7aa50b2c48 (Tejun Heo 2016-10-28 12:58:12 -0400 2283) mutex_lock_io(&journal->j_checkpoint_mutex);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2284) err = jbd2_log_do_checkpoint(journal);
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 2285) mutex_unlock(&journal->j_checkpoint_mutex);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2286) spin_lock(&journal->j_list_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2287) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2288) spin_unlock(&journal->j_list_lock);
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 2289)
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 2290) if (is_journal_aborted(journal))
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 2291) return -EIO;
44519faf22ad6 (Hidehiro Kawai 2008-10-10 20:29:13 -0400 2292)
6fa7aa50b2c48 (Tejun Heo 2016-10-28 12:58:12 -0400 2293) mutex_lock_io(&journal->j_checkpoint_mutex);
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 2294) if (!err) {
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 2295) err = jbd2_cleanup_journal_tail(journal);
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 2296) if (err < 0) {
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 2297) mutex_unlock(&journal->j_checkpoint_mutex);
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 2298) goto out;
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 2299) }
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 2300) err = 0;
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 2301) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2302)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2303) /* Finally, mark the journal as really needing no recovery.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2304) * This sets s_start==0 in the underlying superblock, which is
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2305) * the magic code for a fully-recovered superblock. Any future
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2306) * commits of data to the journal will restore the current
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2307) * s_start value. */
17f423b516076 (Jan Kara 2017-05-04 11:01:31 -0400 2308) jbd2_mark_journal_empty(journal, REQ_SYNC | REQ_FUA);
a78bb11d7acd5 (Jan Kara 2012-03-13 15:43:04 -0400 2309) mutex_unlock(&journal->j_checkpoint_mutex);
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 2310) write_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2311) J_ASSERT(!journal->j_running_transaction);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2312) J_ASSERT(!journal->j_committing_transaction);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2313) J_ASSERT(!journal->j_checkpoint_transactions);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2314) J_ASSERT(journal->j_head == journal->j_tail);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2315) J_ASSERT(journal->j_tail_sequence == journal->j_transaction_sequence);
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 2316) write_unlock(&journal->j_state_lock);
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 2317) out:
6f6a6fda29450 (Joseph Qi 2015-06-15 14:36:01 -0400 2318) return err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2319) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2320)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2321) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 2322) * jbd2_journal_wipe() - Wipe journal contents
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2323) * @journal: Journal to act on.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2324) * @write: flag (see below)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2325) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2326) * Wipe out all of the contents of a journal, safely. This will produce
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2327) * a warning if the journal contains any valid recovery information.
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2328) * Must be called between journal_init_*() and jbd2_journal_load().
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2329) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2330) * If 'write' is non-zero, then we wipe out the journal on disk; otherwise
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2331) * we merely suppress recovery.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2332) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2333)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2334) int jbd2_journal_wipe(journal_t *journal, int write)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2335) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2336) int err = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2337)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2338) J_ASSERT (!(journal->j_flags & JBD2_LOADED));
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2339)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2340) err = load_superblock(journal);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2341) if (err)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2342) return err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2343)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2344) if (!journal->j_tail)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2345) goto no_recovery;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2346)
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 2347) printk(KERN_WARNING "JBD2: %s recovery information on journal\n",
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2348) write ? "Clearing" : "Ignoring");
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2349)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2350) err = jbd2_journal_skip_recovery(journal);
a78bb11d7acd5 (Jan Kara 2012-03-13 15:43:04 -0400 2351) if (write) {
a78bb11d7acd5 (Jan Kara 2012-03-13 15:43:04 -0400 2352) /* Lock to make assertions happy... */
53cf978457325 (Xiaoguang Wang 2019-01-31 23:42:11 -0500 2353) mutex_lock_io(&journal->j_checkpoint_mutex);
17f423b516076 (Jan Kara 2017-05-04 11:01:31 -0400 2354) jbd2_mark_journal_empty(journal, REQ_SYNC | REQ_FUA);
a78bb11d7acd5 (Jan Kara 2012-03-13 15:43:04 -0400 2355) mutex_unlock(&journal->j_checkpoint_mutex);
a78bb11d7acd5 (Jan Kara 2012-03-13 15:43:04 -0400 2356) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2357)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2358) no_recovery:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2359) return err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2360) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2361)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2362) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 2363) * jbd2_journal_abort () - Shutdown the journal immediately.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2364) * @journal: the journal to shutdown.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2365) * @errno: an error number to record in the journal indicating
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2366) * the reason for the shutdown.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2367) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2368) * Perform a complete, immediate shutdown of the ENTIRE
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2369) * journal (not of a single transaction). This operation cannot be
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2370) * undone without closing and reopening the journal.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2371) *
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2372) * The jbd2_journal_abort function is intended to support higher level error
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2373) * recovery mechanisms such as the ext2/ext3 remount-readonly error
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2374) * mode.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2375) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2376) * Journal abort has very specific semantics. Any existing dirty,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2377) * unjournaled buffers in the main filesystem will still be written to
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2378) * disk by bdflush, but the journaling mechanism will be suspended
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2379) * immediately and no further transaction commits will be honoured.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2380) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2381) * Any dirty, journaled buffers will be written back to disk without
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2382) * hitting the journal. Atomicity cannot be guaranteed on an aborted
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2383) * filesystem, but we _do_ attempt to leave as much data as possible
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2384) * behind for fsck to use for cleanup.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2385) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2386) * Any attempt to get a new transaction handle on a journal which is in
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2387) * ABORT state will just result in an -EROFS error return. A
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2388) * jbd2_journal_stop on an existing handle will return -EIO if we have
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2389) * entered abort state during the update.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2390) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2391) * Recursive transactions are not disturbed by journal abort until the
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2392) * final jbd2_journal_stop, which will receive the -EIO error.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2393) *
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2394) * Finally, the jbd2_journal_abort call allows the caller to supply an errno
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2395) * which will be recorded (if possible) in the journal superblock. This
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2396) * allows a client to record failure conditions in the middle of a
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2397) * transaction without having to complete the transaction to record the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2398) * failure to disk. ext3_error, for example, now uses this
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2399) * functionality.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2400) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2401) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2402)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2403) void jbd2_journal_abort(journal_t *journal, int errno)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2404) {
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2405) transaction_t *transaction;
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2406)
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 2407) /*
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 2408) * Lock the aborting procedure until everything is done, this avoid
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 2409) * races between filesystem's error handling flow (e.g. ext4_abort()),
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 2410) * ensure panic after the error info is written into journal's
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 2411) * superblock.
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 2412) */
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 2413) mutex_lock(&journal->j_abort_mutex);
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2414) /*
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2415) * ESHUTDOWN always takes precedence because a file system check
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2416) * caused by any other journal abort error is not required after
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2417) * a shutdown triggered.
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2418) */
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2419) write_lock(&journal->j_state_lock);
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2420) if (journal->j_flags & JBD2_ABORT) {
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2421) int old_errno = journal->j_errno;
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2422)
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2423) write_unlock(&journal->j_state_lock);
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2424) if (old_errno != -ESHUTDOWN && errno == -ESHUTDOWN) {
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2425) journal->j_errno = errno;
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2426) jbd2_journal_update_sb_errno(journal);
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2427) }
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 2428) mutex_unlock(&journal->j_abort_mutex);
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2429) return;
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2430) }
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2431)
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2432) /*
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2433) * Mark the abort as occurred and start current running transaction
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2434) * to release all journaled buffer.
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2435) */
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2436) pr_err("Aborting journal on device %s.\n", journal->j_devname);
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2437)
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2438) journal->j_flags |= JBD2_ABORT;
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2439) journal->j_errno = errno;
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2440) transaction = journal->j_running_transaction;
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2441) if (transaction)
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2442) __jbd2_log_start_commit(journal, transaction->t_tid);
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2443) write_unlock(&journal->j_state_lock);
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2444)
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2445) /*
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2446) * Record errno to the journal super block, so that fsck and jbd2
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2447) * layer could realise that a filesystem check is needed.
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2448) */
7f6225e446cc8 (zhangyi (F) 2019-12-04 20:46:14 +0800 2449) jbd2_journal_update_sb_errno(journal);
7b97d868b7ab2 (zhangyi (F) 2020-06-09 15:35:40 +0800 2450) mutex_unlock(&journal->j_abort_mutex);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2451) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2452)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2453) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 2454) * jbd2_journal_errno() - returns the journal's error state.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2455) * @journal: journal to examine.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2456) *
bfcd3555af478 (Alberto Bertogli 2009-06-09 00:06:20 -0400 2457) * This is the errno number set with jbd2_journal_abort(), the last
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2458) * time the journal was mounted - if the journal was stopped
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2459) * without calling abort this will be 0.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2460) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2461) * If the journal has been aborted on this mount time -EROFS will
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2462) * be returned.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2463) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2464) int jbd2_journal_errno(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2465) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2466) int err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2467)
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 2468) read_lock(&journal->j_state_lock);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2469) if (journal->j_flags & JBD2_ABORT)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2470) err = -EROFS;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2471) else
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2472) err = journal->j_errno;
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 2473) read_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2474) return err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2475) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2476)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2477) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 2478) * jbd2_journal_clear_err() - clears the journal's error state
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2479) * @journal: journal to act on.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2480) *
bfcd3555af478 (Alberto Bertogli 2009-06-09 00:06:20 -0400 2481) * An error must be cleared or acked to take a FS out of readonly
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2482) * mode.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2483) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2484) int jbd2_journal_clear_err(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2485) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2486) int err = 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2487)
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 2488) write_lock(&journal->j_state_lock);
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2489) if (journal->j_flags & JBD2_ABORT)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2490) err = -EROFS;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2491) else
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2492) journal->j_errno = 0;
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 2493) write_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2494) return err;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2495) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2496)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2497) /**
2bf31d94423c8 (Mauro Carvalho Chehab 2020-11-16 11:18:08 +0100 2498) * jbd2_journal_ack_err() - Ack journal err.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2499) * @journal: journal to act on.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2500) *
bfcd3555af478 (Alberto Bertogli 2009-06-09 00:06:20 -0400 2501) * An error must be cleared or acked to take a FS out of readonly
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2502) * mode.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2503) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2504) void jbd2_journal_ack_err(journal_t *journal)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2505) {
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 2506) write_lock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2507) if (journal->j_errno)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2508) journal->j_flags |= JBD2_ACK_ERR;
a931da6ac9331 (Theodore Ts'o 2010-08-03 21:35:12 -0400 2509) write_unlock(&journal->j_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2510) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2511)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2512) int jbd2_journal_blocks_per_page(struct inode *inode)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2513) {
09cbfeaf1a5a6 (Kirill A. Shutemov 2016-04-01 15:29:47 +0300 2514) return 1 << (PAGE_SHIFT - inode->i_sb->s_blocksize_bits);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2515) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2516)
b517bea1c74e4 (Zach Brown 2006-10-11 01:21:08 -0700 2517) /*
b517bea1c74e4 (Zach Brown 2006-10-11 01:21:08 -0700 2518) * helper functions to deal with 32 or 64bit block numbers.
b517bea1c74e4 (Zach Brown 2006-10-11 01:21:08 -0700 2519) */
b517bea1c74e4 (Zach Brown 2006-10-11 01:21:08 -0700 2520) size_t journal_tag_bytes(journal_t *journal)
b517bea1c74e4 (Zach Brown 2006-10-11 01:21:08 -0700 2521) {
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2522) size_t sz;
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2523)
56316a0d28f25 (Darrick J. Wong 2015-10-17 16:18:45 -0400 2524) if (jbd2_has_feature_csum3(journal))
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2525) return sizeof(journal_block_tag3_t);
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2526)
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2527) sz = sizeof(journal_block_tag_t);
c390087591dcb (Darrick J. Wong 2012-05-27 08:12:12 -0400 2528)
56316a0d28f25 (Darrick J. Wong 2015-10-17 16:18:45 -0400 2529) if (jbd2_has_feature_csum2(journal))
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2530) sz += sizeof(__u16);
c390087591dcb (Darrick J. Wong 2012-05-27 08:12:12 -0400 2531)
56316a0d28f25 (Darrick J. Wong 2015-10-17 16:18:45 -0400 2532) if (jbd2_has_feature_64bit(journal))
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2533) return sz;
b517bea1c74e4 (Zach Brown 2006-10-11 01:21:08 -0700 2534) else
db9ee220361de (Darrick J. Wong 2014-08-27 18:40:07 -0400 2535) return sz - sizeof(__u32);
b517bea1c74e4 (Zach Brown 2006-10-11 01:21:08 -0700 2536) }
b517bea1c74e4 (Zach Brown 2006-10-11 01:21:08 -0700 2537)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2538) /*
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2539) * JBD memory management
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2540) *
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2541) * These functions are used to allocate block-sized chunks of memory
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2542) * used for making copies of buffer_head data. Very often it will be
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2543) * page-sized chunks of data, but sometimes it will be in
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2544) * sub-page-size chunks. (For example, 16k pages on Power systems
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2545) * with a 4k block file system.) For blocks smaller than a page, we
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2546) * use a SLAB allocator. There are slab caches for each block size,
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2547) * which are allocated at mount time, if necessary, and we only free
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2548) * (all of) the slab caches when/if the jbd2 module is unloaded. For
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2549) * this reason we don't need to a mutex to protect access to
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2550) * jbd2_slab[] allocating or releasing memory; only in
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2551) * jbd2_journal_create_slab().
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2552) */
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2553) #define JBD2_MAX_SLABS 8
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2554) static struct kmem_cache *jbd2_slab[JBD2_MAX_SLABS];
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2555)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2556) static const char *jbd2_slab_names[JBD2_MAX_SLABS] = {
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2557) "jbd2_1k", "jbd2_2k", "jbd2_4k", "jbd2_8k",
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2558) "jbd2_16k", "jbd2_32k", "jbd2_64k", "jbd2_128k"
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2559) };
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2560)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2561)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2562) static void jbd2_journal_destroy_slabs(void)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2563) {
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2564) int i;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2565)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2566) for (i = 0; i < JBD2_MAX_SLABS; i++) {
8bdd5b60e0273 (Wang Long 2018-05-20 22:38:26 -0400 2567) kmem_cache_destroy(jbd2_slab[i]);
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2568) jbd2_slab[i] = NULL;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2569) }
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2570) }
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2571)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2572) static int jbd2_journal_create_slab(size_t size)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2573) {
51dfacdef38b1 (Thomas Gleixner 2010-10-16 22:34:39 +0200 2574) static DEFINE_MUTEX(jbd2_slab_create_mutex);
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2575) int i = order_base_2(size) - 10;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2576) size_t slab_size;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2577)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2578) if (size == PAGE_SIZE)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2579) return 0;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2580)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2581) if (i >= JBD2_MAX_SLABS)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2582) return -EINVAL;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2583)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2584) if (unlikely(i < 0))
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2585) i = 0;
51dfacdef38b1 (Thomas Gleixner 2010-10-16 22:34:39 +0200 2586) mutex_lock(&jbd2_slab_create_mutex);
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2587) if (jbd2_slab[i]) {
51dfacdef38b1 (Thomas Gleixner 2010-10-16 22:34:39 +0200 2588) mutex_unlock(&jbd2_slab_create_mutex);
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2589) return 0; /* Already created */
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2590) }
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2591)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2592) slab_size = 1 << (i+10);
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2593) jbd2_slab[i] = kmem_cache_create(jbd2_slab_names[i], slab_size,
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2594) slab_size, 0, NULL);
51dfacdef38b1 (Thomas Gleixner 2010-10-16 22:34:39 +0200 2595) mutex_unlock(&jbd2_slab_create_mutex);
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2596) if (!jbd2_slab[i]) {
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2597) printk(KERN_EMERG "JBD2: no memory for jbd2_slab cache\n");
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2598) return -ENOMEM;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2599) }
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2600) return 0;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2601) }
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2602)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2603) static struct kmem_cache *get_slab(size_t size)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2604) {
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2605) int i = order_base_2(size) - 10;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2606)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2607) BUG_ON(i >= JBD2_MAX_SLABS);
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2608) if (unlikely(i < 0))
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2609) i = 0;
8ac97b74bca1f (Bill Pemberton 2010-04-30 09:34:31 -0400 2610) BUG_ON(jbd2_slab[i] == NULL);
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2611) return jbd2_slab[i];
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2612) }
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2613)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2614) void *jbd2_alloc(size_t size, gfp_t flags)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2615) {
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2616) void *ptr;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2617)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2618) BUG_ON(size & (size-1)); /* Must be a power of 2 */
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2619)
f2db19719a4e7 (Michal Hocko 2016-06-24 14:49:28 -0700 2620) if (size < PAGE_SIZE)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2621) ptr = kmem_cache_alloc(get_slab(size), flags);
f2db19719a4e7 (Michal Hocko 2016-06-24 14:49:28 -0700 2622) else
f2db19719a4e7 (Michal Hocko 2016-06-24 14:49:28 -0700 2623) ptr = (void *)__get_free_pages(flags, get_order(size));
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2624)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2625) /* Check alignment; SLUB has gotten this wrong in the past,
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2626) * and this can lead to user data corruption! */
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2627) BUG_ON(((unsigned long) ptr) & (size-1));
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2628)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2629) return ptr;
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2630) }
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2631)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2632) void jbd2_free(void *ptr, size_t size)
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2633) {
f2db19719a4e7 (Michal Hocko 2016-06-24 14:49:28 -0700 2634) if (size < PAGE_SIZE)
f2db19719a4e7 (Michal Hocko 2016-06-24 14:49:28 -0700 2635) kmem_cache_free(get_slab(size), ptr);
f2db19719a4e7 (Michal Hocko 2016-06-24 14:49:28 -0700 2636) else
f2db19719a4e7 (Michal Hocko 2016-06-24 14:49:28 -0700 2637) free_pages((unsigned long)ptr, get_order(size));
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2638) };
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2639)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2640) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2641) * Journal_head storage management
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2642) */
e18b890bb0881 (Christoph Lameter 2006-12-06 20:33:20 -0800 2643) static struct kmem_cache *jbd2_journal_head_cache;
e23291b9120c1 (Jose R. Santos 2007-07-18 08:57:06 -0400 2644) #ifdef CONFIG_JBD2_DEBUG
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2645) static atomic_t nr_journal_heads = ATOMIC_INIT(0);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2646) #endif
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2647)
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2648) static int __init jbd2_journal_init_journal_head_cache(void)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2649) {
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2650) J_ASSERT(!jbd2_journal_head_cache);
a920e9416b346 (Johann Lombardi 2006-10-11 01:21:00 -0700 2651) jbd2_journal_head_cache = kmem_cache_create("jbd2_journal_head",
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2652) sizeof(struct journal_head),
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2653) 0, /* offset */
5f0d5a3ae7cff (Paul E. McKenney 2017-01-18 02:53:44 -0800 2654) SLAB_TEMPORARY | SLAB_TYPESAFE_BY_RCU,
20c2df83d25c6 (Paul Mundt 2007-07-20 10:11:58 +0900 2655) NULL); /* ctor */
1076d17ac70d1 (Al Viro 2008-03-29 03:07:18 +0000 2656) if (!jbd2_journal_head_cache) {
f2a44523b20f3 (Eryu Guan 2011-11-01 19:09:18 -0400 2657) printk(KERN_EMERG "JBD2: no memory for journal_head cache\n");
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2658) return -ENOMEM;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2659) }
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2660) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2661) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2662)
4185a2ac422c7 (Yongqiang Yang 2012-02-20 17:53:03 -0500 2663) static void jbd2_journal_destroy_journal_head_cache(void)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2664) {
8bdd5b60e0273 (Wang Long 2018-05-20 22:38:26 -0400 2665) kmem_cache_destroy(jbd2_journal_head_cache);
8bdd5b60e0273 (Wang Long 2018-05-20 22:38:26 -0400 2666) jbd2_journal_head_cache = NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2667) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2668)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2669) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2670) * journal_head splicing and dicing
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2671) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2672) static struct journal_head *journal_alloc_journal_head(void)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2673) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2674) struct journal_head *ret;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2675)
e23291b9120c1 (Jose R. Santos 2007-07-18 08:57:06 -0400 2676) #ifdef CONFIG_JBD2_DEBUG
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2677) atomic_inc(&nr_journal_heads);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2678) #endif
5d9cf9c6254dd (Zheng Liu 2013-05-28 07:27:11 -0400 2679) ret = kmem_cache_zalloc(jbd2_journal_head_cache, GFP_NOFS);
1076d17ac70d1 (Al Viro 2008-03-29 03:07:18 +0000 2680) if (!ret) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2681) jbd_debug(1, "out of memory for journal_head\n");
670be5a78ac7c (Theodore Ts'o 2010-12-17 10:44:16 -0500 2682) pr_notice_ratelimited("ENOMEM in %s, retrying.\n", __func__);
7b506b1035326 (Michal Hocko 2015-06-15 15:45:58 -0400 2683) ret = kmem_cache_zalloc(jbd2_journal_head_cache,
7b506b1035326 (Michal Hocko 2015-06-15 15:45:58 -0400 2684) GFP_NOFS | __GFP_NOFAIL);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2685) }
464170647b564 (Thomas Gleixner 2019-08-09 14:42:32 +0200 2686) if (ret)
464170647b564 (Thomas Gleixner 2019-08-09 14:42:32 +0200 2687) spin_lock_init(&ret->b_state_lock);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2688) return ret;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2689) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2690)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2691) static void journal_free_journal_head(struct journal_head *jh)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2692) {
e23291b9120c1 (Jose R. Santos 2007-07-18 08:57:06 -0400 2693) #ifdef CONFIG_JBD2_DEBUG
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2694) atomic_dec(&nr_journal_heads);
cd02ff0b14b7e (Mingming Cao 2007-10-16 18:38:25 -0400 2695) memset(jh, JBD2_POISON_FREE, sizeof(*jh));
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2696) #endif
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2697) kmem_cache_free(jbd2_journal_head_cache, jh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2698) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2699)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2700) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2701) * A journal_head is attached to a buffer_head whenever JBD has an
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2702) * interest in the buffer.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2703) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2704) * Whenever a buffer has an attached journal_head, its ->b_state:BH_JBD bit
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2705) * is set. This bit is tested in core kernel code where we need to take
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2706) * JBD-specific actions. Testing the zeroness of ->b_private is not reliable
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2707) * there.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2708) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2709) * When a buffer has its BH_JBD bit set, its ->b_count is elevated by one.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2710) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2711) * When a buffer has its BH_JBD bit set it is immune from being released by
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2712) * core kernel code, mainly via ->b_count.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2713) *
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2714) * A journal_head is detached from its buffer_head when the journal_head's
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2715) * b_jcount reaches zero. Running transaction (b_transaction) and checkpoint
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2716) * transaction (b_cp_transaction) hold their references to b_jcount.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2717) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2718) * Various places in the kernel want to attach a journal_head to a buffer_head
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2719) * _before_ attaching the journal_head to a transaction. To protect the
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2720) * journal_head in this situation, jbd2_journal_add_journal_head elevates the
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2721) * journal_head's b_jcount refcount by one. The caller must call
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2722) * jbd2_journal_put_journal_head() to undo this.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2723) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2724) * So the typical usage would be:
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2725) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2726) * (Attach a journal_head if needed. Increments b_jcount)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2727) * struct journal_head *jh = jbd2_journal_add_journal_head(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2728) * ...
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2729) * (Get another reference for transaction)
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2730) * jbd2_journal_grab_journal_head(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2731) * jh->b_transaction = xxx;
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2732) * (Put original reference)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2733) * jbd2_journal_put_journal_head(jh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2734) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2735)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2736) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2737) * Give a buffer_head a journal_head.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2738) *
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2739) * May sleep.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2740) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2741) struct journal_head *jbd2_journal_add_journal_head(struct buffer_head *bh)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2742) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2743) struct journal_head *jh;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2744) struct journal_head *new_jh = NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2745)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2746) repeat:
5d9cf9c6254dd (Zheng Liu 2013-05-28 07:27:11 -0400 2747) if (!buffer_jbd(bh))
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2748) new_jh = journal_alloc_journal_head();
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2749)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2750) jbd_lock_bh_journal_head(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2751) if (buffer_jbd(bh)) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2752) jh = bh2jh(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2753) } else {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2754) J_ASSERT_BH(bh,
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2755) (atomic_read(&bh->b_count) > 0) ||
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2756) (bh->b_page && bh->b_page->mapping));
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2757)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2758) if (!new_jh) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2759) jbd_unlock_bh_journal_head(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2760) goto repeat;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2761) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2762)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2763) jh = new_jh;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2764) new_jh = NULL; /* We consumed it */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2765) set_buffer_jbd(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2766) bh->b_private = jh;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2767) jh->b_bh = bh;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2768) get_bh(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2769) BUFFER_TRACE(bh, "added journal_head");
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2770) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2771) jh->b_jcount++;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2772) jbd_unlock_bh_journal_head(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2773) if (new_jh)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2774) journal_free_journal_head(new_jh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2775) return bh->b_private;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2776) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2777)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2778) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2779) * Grab a ref against this buffer_head's journal_head. If it ended up not
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2780) * having a journal_head, return NULL
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2781) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2782) struct journal_head *jbd2_journal_grab_journal_head(struct buffer_head *bh)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2783) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2784) struct journal_head *jh = NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2785)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2786) jbd_lock_bh_journal_head(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2787) if (buffer_jbd(bh)) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2788) jh = bh2jh(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2789) jh->b_jcount++;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2790) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2791) jbd_unlock_bh_journal_head(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2792) return jh;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2793) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2794)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2795) static void __journal_remove_journal_head(struct buffer_head *bh)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2796) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2797) struct journal_head *jh = bh2jh(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2798)
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2799) J_ASSERT_JH(jh, jh->b_transaction == NULL);
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2800) J_ASSERT_JH(jh, jh->b_next_transaction == NULL);
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2801) J_ASSERT_JH(jh, jh->b_cp_transaction == NULL);
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2802) J_ASSERT_JH(jh, jh->b_jlist == BJ_None);
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2803) J_ASSERT_BH(bh, buffer_jbd(bh));
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2804) J_ASSERT_BH(bh, jh2bh(jh) == bh);
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2805) BUFFER_TRACE(bh, "remove journal_head");
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2806)
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2807) /* Unlink before dropping the lock */
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2808) bh->b_private = NULL;
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2809) jh->b_bh = NULL; /* debug, really */
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2810) clear_buffer_jbd(bh);
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2811) }
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2812)
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2813) static void journal_release_journal_head(struct journal_head *jh, size_t b_size)
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2814) {
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2815) if (jh->b_frozen_data) {
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2816) printk(KERN_WARNING "%s: freeing b_frozen_data\n", __func__);
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2817) jbd2_free(jh->b_frozen_data, b_size);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2818) }
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2819) if (jh->b_committed_data) {
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2820) printk(KERN_WARNING "%s: freeing b_committed_data\n", __func__);
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2821) jbd2_free(jh->b_committed_data, b_size);
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2822) }
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2823) journal_free_journal_head(jh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2824) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2825)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2826) /*
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2827) * Drop a reference on the passed journal_head. If it fell to zero then
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2828) * release the journal_head from the buffer_head.
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2829) */
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2830) void jbd2_journal_put_journal_head(struct journal_head *jh)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2831) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2832) struct buffer_head *bh = jh2bh(jh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2833)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2834) jbd_lock_bh_journal_head(bh);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2835) J_ASSERT_JH(jh, jh->b_jcount > 0);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2836) --jh->b_jcount;
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2837) if (!jh->b_jcount) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2838) __journal_remove_journal_head(bh);
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2839) jbd_unlock_bh_journal_head(bh);
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2840) journal_release_journal_head(jh, bh->b_size);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2841) __brelse(bh);
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2842) } else {
de1b794130b13 (Jan Kara 2011-06-13 15:38:22 -0400 2843) jbd_unlock_bh_journal_head(bh);
7855a57d008b2 (Thomas Gleixner 2019-08-09 14:42:33 +0200 2844) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2845) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2846)
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2847) /*
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2848) * Initialize jbd inode head
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2849) */
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2850) void jbd2_journal_init_jbd_inode(struct jbd2_inode *jinode, struct inode *inode)
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2851) {
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2852) jinode->i_transaction = NULL;
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2853) jinode->i_next_transaction = NULL;
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2854) jinode->i_vfs_inode = inode;
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2855) jinode->i_flags = 0;
6ba0e7dc64a5a (Ross Zwisler 2019-06-20 17:24:56 -0400 2856) jinode->i_dirty_start = 0;
6ba0e7dc64a5a (Ross Zwisler 2019-06-20 17:24:56 -0400 2857) jinode->i_dirty_end = 0;
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2858) INIT_LIST_HEAD(&jinode->i_list);
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2859) }
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2860)
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2861) /*
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2862) * Function to be called before we start removing inode from memory (i.e.,
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2863) * clear_inode() is a fine place to be called from). It removes inode from
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2864) * transaction's lists.
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2865) */
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2866) void jbd2_journal_release_jbd_inode(journal_t *journal,
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2867) struct jbd2_inode *jinode)
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2868) {
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2869) if (!journal)
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2870) return;
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2871) restart:
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2872) spin_lock(&journal->j_list_lock);
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2873) /* Is commit writing out inode - we have to wait */
cb0d9d47a39de (Jan Kara 2016-02-22 23:20:30 -0500 2874) if (jinode->i_flags & JI_COMMIT_RUNNING) {
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2875) wait_queue_head_t *wq;
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2876) DEFINE_WAIT_BIT(wait, &jinode->i_flags, __JI_COMMIT_RUNNING);
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2877) wq = bit_waitqueue(&jinode->i_flags, __JI_COMMIT_RUNNING);
2141713616c65 (Ingo Molnar 2017-03-05 11:25:39 +0100 2878) prepare_to_wait(wq, &wait.wq_entry, TASK_UNINTERRUPTIBLE);
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2879) spin_unlock(&journal->j_list_lock);
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2880) schedule();
2141713616c65 (Ingo Molnar 2017-03-05 11:25:39 +0100 2881) finish_wait(wq, &wait.wq_entry);
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2882) goto restart;
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2883) }
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2884)
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2885) if (jinode->i_transaction) {
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2886) list_del(&jinode->i_list);
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2887) jinode->i_transaction = NULL;
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2888) }
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2889) spin_unlock(&journal->j_list_lock);
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2890) }
c851ed5401737 (Jan Kara 2008-07-11 19:27:31 -0400 2891)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2892)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2893) #ifdef CONFIG_PROC_FS
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2894)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2895) #define JBD2_STATS_PROC_NAME "fs/jbd2"
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2896)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2897) static void __init jbd2_create_jbd_stats_proc_entry(void)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2898) {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2899) proc_jbd2_stats = proc_mkdir(JBD2_STATS_PROC_NAME, NULL);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2900) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2901)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2902) static void __exit jbd2_remove_jbd_stats_proc_entry(void)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2903) {
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2904) if (proc_jbd2_stats)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2905) remove_proc_entry(JBD2_STATS_PROC_NAME, NULL);
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2906) }
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2907)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2908) #else
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2909)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2910) #define jbd2_create_jbd_stats_proc_entry() do {} while (0)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2911) #define jbd2_remove_jbd_stats_proc_entry() do {} while (0)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2912)
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2913) #endif
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 2914)
8aefcd557d26d (Theodore Ts'o 2011-01-10 12:29:43 -0500 2915) struct kmem_cache *jbd2_handle_cache, *jbd2_inode_cache;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2916)
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2917) static int __init jbd2_journal_init_inode_cache(void)
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2918) {
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2919) J_ASSERT(!jbd2_inode_cache);
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2920) jbd2_inode_cache = KMEM_CACHE(jbd2_inode, 0);
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2921) if (!jbd2_inode_cache) {
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2922) pr_emerg("JBD2: failed to create inode cache\n");
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2923) return -ENOMEM;
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2924) }
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2925) return 0;
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2926) }
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2927)
4185a2ac422c7 (Yongqiang Yang 2012-02-20 17:53:03 -0500 2928) static int __init jbd2_journal_init_handle_cache(void)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2929) {
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2930) J_ASSERT(!jbd2_handle_cache);
8aefcd557d26d (Theodore Ts'o 2011-01-10 12:29:43 -0500 2931) jbd2_handle_cache = KMEM_CACHE(jbd2_journal_handle, SLAB_TEMPORARY);
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2932) if (!jbd2_handle_cache) {
8aefcd557d26d (Theodore Ts'o 2011-01-10 12:29:43 -0500 2933) printk(KERN_EMERG "JBD2: failed to create handle cache\n");
8aefcd557d26d (Theodore Ts'o 2011-01-10 12:29:43 -0500 2934) return -ENOMEM;
8aefcd557d26d (Theodore Ts'o 2011-01-10 12:29:43 -0500 2935) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2936) return 0;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2937) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2938)
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2939) static void jbd2_journal_destroy_inode_cache(void)
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2940) {
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2941) kmem_cache_destroy(jbd2_inode_cache);
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2942) jbd2_inode_cache = NULL;
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2943) }
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2944)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2945) static void jbd2_journal_destroy_handle_cache(void)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2946) {
8bdd5b60e0273 (Wang Long 2018-05-20 22:38:26 -0400 2947) kmem_cache_destroy(jbd2_handle_cache);
8bdd5b60e0273 (Wang Long 2018-05-20 22:38:26 -0400 2948) jbd2_handle_cache = NULL;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2949) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2950)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2951) /*
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2952) * Module startup and shutdown
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2953) */
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2954)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2955) static int __init journal_init_caches(void)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2956) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2957) int ret;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2958)
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2959) ret = jbd2_journal_init_revoke_record_cache();
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2960) if (ret == 0)
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2961) ret = jbd2_journal_init_revoke_table_cache();
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2962) if (ret == 0)
4185a2ac422c7 (Yongqiang Yang 2012-02-20 17:53:03 -0500 2963) ret = jbd2_journal_init_journal_head_cache();
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2964) if (ret == 0)
4185a2ac422c7 (Yongqiang Yang 2012-02-20 17:53:03 -0500 2965) ret = jbd2_journal_init_handle_cache();
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2966) if (ret == 0)
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2967) ret = jbd2_journal_init_inode_cache();
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2968) if (ret == 0)
0c2022eccb016 (Yongqiang Yang 2012-02-20 17:53:02 -0500 2969) ret = jbd2_journal_init_transaction_cache();
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2970) return ret;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2971) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2972)
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2973) static void jbd2_journal_destroy_caches(void)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2974) {
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2975) jbd2_journal_destroy_revoke_record_cache();
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2976) jbd2_journal_destroy_revoke_table_cache();
4185a2ac422c7 (Yongqiang Yang 2012-02-20 17:53:03 -0500 2977) jbd2_journal_destroy_journal_head_cache();
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2978) jbd2_journal_destroy_handle_cache();
0d52154bb0a70 (Chengguang Xu 2019-05-10 21:15:47 -0400 2979) jbd2_journal_destroy_inode_cache();
0c2022eccb016 (Yongqiang Yang 2012-02-20 17:53:02 -0500 2980) jbd2_journal_destroy_transaction_cache();
d2eecb0393687 (Theodore Ts'o 2009-12-07 10:36:20 -0500 2981) jbd2_journal_destroy_slabs();
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2982) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2983)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2984) static int __init journal_init(void)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2985) {
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2986) int ret;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2987)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2988) BUILD_BUG_ON(sizeof(struct journal_superblock_s) != 1024);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2989)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2990) ret = journal_init_caches();
620de4e19890c (Duane Griffin 2008-04-29 22:02:47 -0400 2991) if (ret == 0) {
620de4e19890c (Duane Griffin 2008-04-29 22:02:47 -0400 2992) jbd2_create_jbd_stats_proc_entry();
620de4e19890c (Duane Griffin 2008-04-29 22:02:47 -0400 2993) } else {
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 2994) jbd2_journal_destroy_caches();
620de4e19890c (Duane Griffin 2008-04-29 22:02:47 -0400 2995) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2996) return ret;
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2997) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2998)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 2999) static void __exit journal_exit(void)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 3000) {
e23291b9120c1 (Jose R. Santos 2007-07-18 08:57:06 -0400 3001) #ifdef CONFIG_JBD2_DEBUG
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 3002) int n = atomic_read(&nr_journal_heads);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 3003) if (n)
75685071cd5b2 (Jan Kara 2013-12-08 21:13:59 -0500 3004) printk(KERN_ERR "JBD2: leaked %d journal_heads!\n", n);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 3005) #endif
8e85fb3f305b2 (Johann Lombardi 2008-01-28 23:58:27 -0500 3006) jbd2_remove_jbd_stats_proc_entry();
f7f4bccb72984 (Mingming Cao 2006-10-11 01:20:59 -0700 3007) jbd2_journal_destroy_caches();
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 3008) }
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 3009)
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 3010) MODULE_LICENSE("GPL");
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 3011) module_init(journal_init);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 3012) module_exit(journal_exit);
470decc613ab2 (Dave Kleikamp 2006-10-11 01:20:57 -0700 3013)
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