b24413180f560 (Greg Kroah-Hartman 2017-11-01 15:07:57 +0100 1) // SPDX-License-Identifier: GPL-2.0
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 2) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 3) * linux/fs/sysv/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 4) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 5) * minix/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 6) * Copyright (C) 1991, 1992 Linus Torvalds
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 7) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 8) * xenix/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 9) * Copyright (C) 1992 Doug Evans
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 10) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 11) * coh/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 12) * Copyright (C) 1993 Pascal Haible, Bruno Haible
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 13) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 14) * sysv/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 15) * Copyright (C) 1993 Paul B. Monday
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 16) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 17) * sysv/inode.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 18) * Copyright (C) 1993 Bruno Haible
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 19) * Copyright (C) 1997, 1998 Krzysztof G. Baranowski
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 20) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 21) * This file contains code for allocating/freeing inodes and for read/writing
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 22) * the superblock.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 23) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 24)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 25) #include <linux/highuid.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 26) #include <linux/slab.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 27) #include <linux/init.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 28) #include <linux/buffer_head.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 29) #include <linux/vfs.h>
a9185b41a4f84 (Christoph Hellwig 2010-03-05 09:21:37 +0100 30) #include <linux/writeback.h>
21acaf8e8da00 (Duane Griffin 2008-12-19 20:47:16 +0000 31) #include <linux/namei.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 32) #include <asm/byteorder.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 33) #include "sysv.h"
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 34)
ad43ffdeea0a7 (Christoph Hellwig 2009-06-08 10:07:45 +0200 35) static int sysv_sync_fs(struct super_block *sb, int wait)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 36) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 37) struct sysv_sb_info *sbi = SYSV_SB(sb);
3e811f053aec6 (Arnd Bergmann 2018-08-21 22:01:13 -0700 38) u32 time = (u32)ktime_get_real_seconds(), old_time;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 39)
c07cb01c45d6f (Marco Stornelli 2012-10-06 12:41:46 +0200 40) mutex_lock(&sbi->s_lock);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 41)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 42) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 43) * If we are going to write out the super block,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 44) * then attach current time stamp.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 45) * But if the filesystem was marked clean, keep it clean.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 46) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 47) old_time = fs32_to_cpu(sbi, *sbi->s_sb_time);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 48) if (sbi->s_type == FSTYPE_SYSV4) {
3e811f053aec6 (Arnd Bergmann 2018-08-21 22:01:13 -0700 49) if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38u - old_time))
3e811f053aec6 (Arnd Bergmann 2018-08-21 22:01:13 -0700 50) *sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38u - time);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 51) *sbi->s_sb_time = cpu_to_fs32(sbi, time);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 52) mark_buffer_dirty(sbi->s_bh2);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 53) }
ad43ffdeea0a7 (Christoph Hellwig 2009-06-08 10:07:45 +0200 54)
c07cb01c45d6f (Marco Stornelli 2012-10-06 12:41:46 +0200 55) mutex_unlock(&sbi->s_lock);
ad43ffdeea0a7 (Christoph Hellwig 2009-06-08 10:07:45 +0200 56)
ad43ffdeea0a7 (Christoph Hellwig 2009-06-08 10:07:45 +0200 57) return 0;
ad43ffdeea0a7 (Christoph Hellwig 2009-06-08 10:07:45 +0200 58) }
ad43ffdeea0a7 (Christoph Hellwig 2009-06-08 10:07:45 +0200 59)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 60) static int sysv_remount(struct super_block *sb, int *flags, char *data)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 61) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 62) struct sysv_sb_info *sbi = SYSV_SB(sb);
eee458936b52b (Artem Bityutskiy 2012-07-03 16:43:27 +0300 63)
02b9984d64087 (Theodore Ts'o 2014-03-13 10:14:33 -0400 64) sync_filesystem(sb);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 65) if (sbi->s_forced_ro)
1751e8a6cb935 (Linus Torvalds 2017-11-27 13:05:09 -0800 66) *flags |= SB_RDONLY;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 67) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 68) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 69)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 70) static void sysv_put_super(struct super_block *sb)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 71) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 72) struct sysv_sb_info *sbi = SYSV_SB(sb);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 73)
bc98a42c1f7d0 (David Howells 2017-07-17 08:45:34 +0100 74) if (!sb_rdonly(sb)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 75) /* XXX ext2 also updates the state here */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 76) mark_buffer_dirty(sbi->s_bh1);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 77) if (sbi->s_bh1 != sbi->s_bh2)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 78) mark_buffer_dirty(sbi->s_bh2);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 79) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 80)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 81) brelse(sbi->s_bh1);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 82) if (sbi->s_bh1 != sbi->s_bh2)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 83) brelse(sbi->s_bh2);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 84)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 85) kfree(sbi);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 86) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 87)
726c334223180 (David Howells 2006-06-23 02:02:58 -0700 88) static int sysv_statfs(struct dentry *dentry, struct kstatfs *buf)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 89) {
726c334223180 (David Howells 2006-06-23 02:02:58 -0700 90) struct super_block *sb = dentry->d_sb;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 91) struct sysv_sb_info *sbi = SYSV_SB(sb);
1c5b45411f93b (Coly Li 2009-04-02 16:59:43 -0700 92) u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 93)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 94) buf->f_type = sb->s_magic;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 95) buf->f_bsize = sb->s_blocksize;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 96) buf->f_blocks = sbi->s_ndatazones;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 97) buf->f_bavail = buf->f_bfree = sysv_count_free_blocks(sb);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 98) buf->f_files = sbi->s_ninodes;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 99) buf->f_ffree = sysv_count_free_inodes(sb);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 100) buf->f_namelen = SYSV_NAMELEN;
6d1349c769ea2 (Al Viro 2020-09-18 16:45:50 -0400 101) buf->f_fsid = u64_to_fsid(id);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 102) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 103) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 104)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 105) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 106) * NXI <-> N0XI for PDP, XIN <-> XIN0 for le32, NIX <-> 0NIX for be32
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 107) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 108) static inline void read3byte(struct sysv_sb_info *sbi,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 109) unsigned char * from, unsigned char * to)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 110) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 111) if (sbi->s_bytesex == BYTESEX_PDP) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 112) to[0] = from[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 113) to[1] = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 114) to[2] = from[1];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 115) to[3] = from[2];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 116) } else if (sbi->s_bytesex == BYTESEX_LE) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 117) to[0] = from[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 118) to[1] = from[1];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 119) to[2] = from[2];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 120) to[3] = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 121) } else {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 122) to[0] = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 123) to[1] = from[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 124) to[2] = from[1];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 125) to[3] = from[2];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 126) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 127) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 128)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 129) static inline void write3byte(struct sysv_sb_info *sbi,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 130) unsigned char * from, unsigned char * to)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 131) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 132) if (sbi->s_bytesex == BYTESEX_PDP) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 133) to[0] = from[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 134) to[1] = from[2];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 135) to[2] = from[3];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 136) } else if (sbi->s_bytesex == BYTESEX_LE) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 137) to[0] = from[0];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 138) to[1] = from[1];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 139) to[2] = from[2];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 140) } else {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 141) to[0] = from[1];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 142) to[1] = from[2];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 143) to[2] = from[3];
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 144) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 145) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 146)
c5ef1c42c51b1 (Arjan van de Ven 2007-02-12 00:55:40 -0800 147) static const struct inode_operations sysv_symlink_inode_operations = {
6b2553918d8b4 (Al Viro 2015-11-17 10:20:54 -0500 148) .get_link = page_get_link,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 149) .getattr = sysv_getattr,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 150) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 151)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 152) void sysv_set_inode(struct inode *inode, dev_t rdev)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 153) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 154) if (S_ISREG(inode->i_mode)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 155) inode->i_op = &sysv_file_inode_operations;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 156) inode->i_fop = &sysv_file_operations;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 157) inode->i_mapping->a_ops = &sysv_aops;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 158) } else if (S_ISDIR(inode->i_mode)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 159) inode->i_op = &sysv_dir_inode_operations;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 160) inode->i_fop = &sysv_dir_operations;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 161) inode->i_mapping->a_ops = &sysv_aops;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 162) } else if (S_ISLNK(inode->i_mode)) {
0ebf7f10d67a7 (Al Viro 2015-11-23 21:11:08 -0500 163) inode->i_op = &sysv_symlink_inode_operations;
21fc61c73c390 (Al Viro 2015-11-17 01:07:57 -0500 164) inode_nohighmem(inode);
0ebf7f10d67a7 (Al Viro 2015-11-23 21:11:08 -0500 165) inode->i_mapping->a_ops = &sysv_aops;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 166) } else
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 167) init_special_inode(inode, inode->i_mode, rdev);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 168) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 169)
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 170) struct inode *sysv_iget(struct super_block *sb, unsigned int ino)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 171) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 172) struct sysv_sb_info * sbi = SYSV_SB(sb);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 173) struct buffer_head * bh;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 174) struct sysv_inode * raw_inode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 175) struct sysv_inode_info * si;
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 176) struct inode *inode;
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 177) unsigned int block;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 178)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 179) if (!ino || ino > sbi->s_ninodes) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 180) printk("Bad inode number on dev %s: %d is out of range\n",
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 181) sb->s_id, ino);
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 182) return ERR_PTR(-EIO);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 183) }
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 184)
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 185) inode = iget_locked(sb, ino);
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 186) if (!inode)
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 187) return ERR_PTR(-ENOMEM);
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 188) if (!(inode->i_state & I_NEW))
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 189) return inode;
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 190)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 191) raw_inode = sysv_raw_inode(sb, ino, &bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 192) if (!raw_inode) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 193) printk("Major problem: unable to read inode from dev %s\n",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 194) inode->i_sb->s_id);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 195) goto bad_inode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 196) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 197) /* SystemV FS: kludge permissions if ino==SYSV_ROOT_INO ?? */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 198) inode->i_mode = fs16_to_cpu(sbi, raw_inode->i_mode);
a726ecce75896 (Eric W. Biederman 2012-02-10 12:19:23 -0800 199) i_uid_write(inode, (uid_t)fs16_to_cpu(sbi, raw_inode->i_uid));
a726ecce75896 (Eric W. Biederman 2012-02-10 12:19:23 -0800 200) i_gid_write(inode, (gid_t)fs16_to_cpu(sbi, raw_inode->i_gid));
bfe8684869601 (Miklos Szeredi 2011-10-28 14:13:29 +0200 201) set_nlink(inode, fs16_to_cpu(sbi, raw_inode->i_nlink));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 202) inode->i_size = fs32_to_cpu(sbi, raw_inode->i_size);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 203) inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_atime);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 204) inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_mtime);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 205) inode->i_ctime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_ctime);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 206) inode->i_ctime.tv_nsec = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 207) inode->i_atime.tv_nsec = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 208) inode->i_mtime.tv_nsec = 0;
ba52de123d454 (Theodore Ts'o 2006-09-27 01:50:49 -0700 209) inode->i_blocks = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 210)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 211) si = SYSV_I(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 212) for (block = 0; block < 10+1+1+1; block++)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 213) read3byte(sbi, &raw_inode->i_data[3*block],
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 214) (u8 *)&si->i_data[block]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 215) brelse(bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 216) si->i_dir_start_lookup = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 217) if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 218) sysv_set_inode(inode,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 219) old_decode_dev(fs32_to_cpu(sbi, si->i_data[0])));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 220) else
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 221) sysv_set_inode(inode, 0);
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 222) unlock_new_inode(inode);
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 223) return inode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 224)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 225) bad_inode:
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 226) iget_failed(inode);
b8e1343f67460 (David Howells 2008-02-07 00:15:47 -0800 227) return ERR_PTR(-EIO);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 228) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 229)
a9185b41a4f84 (Christoph Hellwig 2010-03-05 09:21:37 +0100 230) static int __sysv_write_inode(struct inode *inode, int wait)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 231) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 232) struct super_block * sb = inode->i_sb;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 233) struct sysv_sb_info * sbi = SYSV_SB(sb);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 234) struct buffer_head * bh;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 235) struct sysv_inode * raw_inode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 236) struct sysv_inode_info * si;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 237) unsigned int ino, block;
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 238) int err = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 239)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 240) ino = inode->i_ino;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 241) if (!ino || ino > sbi->s_ninodes) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 242) printk("Bad inode number on dev %s: %d is out of range\n",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 243) inode->i_sb->s_id, ino);
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 244) return -EIO;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 245) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 246) raw_inode = sysv_raw_inode(sb, ino, &bh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 247) if (!raw_inode) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 248) printk("unable to read i-node block\n");
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 249) return -EIO;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 250) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 251)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 252) raw_inode->i_mode = cpu_to_fs16(sbi, inode->i_mode);
a726ecce75896 (Eric W. Biederman 2012-02-10 12:19:23 -0800 253) raw_inode->i_uid = cpu_to_fs16(sbi, fs_high2lowuid(i_uid_read(inode)));
a726ecce75896 (Eric W. Biederman 2012-02-10 12:19:23 -0800 254) raw_inode->i_gid = cpu_to_fs16(sbi, fs_high2lowgid(i_gid_read(inode)));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 255) raw_inode->i_nlink = cpu_to_fs16(sbi, inode->i_nlink);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 256) raw_inode->i_size = cpu_to_fs32(sbi, inode->i_size);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 257) raw_inode->i_atime = cpu_to_fs32(sbi, inode->i_atime.tv_sec);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 258) raw_inode->i_mtime = cpu_to_fs32(sbi, inode->i_mtime.tv_sec);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 259) raw_inode->i_ctime = cpu_to_fs32(sbi, inode->i_ctime.tv_sec);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 260)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 261) si = SYSV_I(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 262) if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 263) si->i_data[0] = cpu_to_fs32(sbi, old_encode_dev(inode->i_rdev));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 264) for (block = 0; block < 10+1+1+1; block++)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 265) write3byte(sbi, (u8 *)&si->i_data[block],
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 266) &raw_inode->i_data[3*block]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 267) mark_buffer_dirty(bh);
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 268) if (wait) {
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 269) sync_dirty_buffer(bh);
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 270) if (buffer_req(bh) && !buffer_uptodate(bh)) {
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 271) printk ("IO error syncing sysv inode [%s:%08x]\n",
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 272) sb->s_id, ino);
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 273) err = -EIO;
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 274) }
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 275) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 276) brelse(bh);
c4b7d1ba7d263 (YueHaibing 2018-11-10 04:13:24 +0000 277) return err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 278) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 279)
a9185b41a4f84 (Christoph Hellwig 2010-03-05 09:21:37 +0100 280) int sysv_write_inode(struct inode *inode, struct writeback_control *wbc)
a9185b41a4f84 (Christoph Hellwig 2010-03-05 09:21:37 +0100 281) {
a9185b41a4f84 (Christoph Hellwig 2010-03-05 09:21:37 +0100 282) return __sysv_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
a9185b41a4f84 (Christoph Hellwig 2010-03-05 09:21:37 +0100 283) }
a9185b41a4f84 (Christoph Hellwig 2010-03-05 09:21:37 +0100 284)
05459ca81ac30 (Al Viro 2009-06-07 15:29:45 -0400 285) int sysv_sync_inode(struct inode *inode)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 286) {
a9185b41a4f84 (Christoph Hellwig 2010-03-05 09:21:37 +0100 287) return __sysv_write_inode(inode, 1);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 288) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 289)
d299eadc09874 (Al Viro 2010-06-05 19:16:20 -0400 290) static void sysv_evict_inode(struct inode *inode)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 291) {
91b0abe36a7b2 (Johannes Weiner 2014-04-03 14:47:49 -0700 292) truncate_inode_pages_final(&inode->i_data);
d299eadc09874 (Al Viro 2010-06-05 19:16:20 -0400 293) if (!inode->i_nlink) {
d299eadc09874 (Al Viro 2010-06-05 19:16:20 -0400 294) inode->i_size = 0;
d299eadc09874 (Al Viro 2010-06-05 19:16:20 -0400 295) sysv_truncate(inode);
d299eadc09874 (Al Viro 2010-06-05 19:16:20 -0400 296) }
d299eadc09874 (Al Viro 2010-06-05 19:16:20 -0400 297) invalidate_inode_buffers(inode);
dbd5768f87ff6 (Jan Kara 2012-05-03 14:48:02 +0200 298) clear_inode(inode);
d299eadc09874 (Al Viro 2010-06-05 19:16:20 -0400 299) if (!inode->i_nlink)
d299eadc09874 (Al Viro 2010-06-05 19:16:20 -0400 300) sysv_free_inode(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 301) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 302)
e18b890bb0881 (Christoph Lameter 2006-12-06 20:33:20 -0800 303) static struct kmem_cache *sysv_inode_cachep;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 304)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 305) static struct inode *sysv_alloc_inode(struct super_block *sb)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 306) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 307) struct sysv_inode_info *si;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 308)
e94b1766097d5 (Christoph Lameter 2006-12-06 20:33:17 -0800 309) si = kmem_cache_alloc(sysv_inode_cachep, GFP_KERNEL);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 310) if (!si)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 311) return NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 312) return &si->vfs_inode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 313) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 314)
6becf8edf1a74 (Al Viro 2019-04-15 22:26:51 -0400 315) static void sysv_free_in_core_inode(struct inode *inode)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 316) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 317) kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 318) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 319)
51cc50685a427 (Alexey Dobriyan 2008-07-25 19:45:34 -0700 320) static void init_once(void *p)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 321) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 322) struct sysv_inode_info *si = (struct sysv_inode_info *)p;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 323)
a35afb830f8d7 (Christoph Lameter 2007-05-16 22:10:57 -0700 324) inode_init_once(&si->vfs_inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 325) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 326)
ee9b6d61a2a43 (Josef 'Jeff' Sipek 2007-02-12 00:55:41 -0800 327) const struct super_operations sysv_sops = {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 328) .alloc_inode = sysv_alloc_inode,
6becf8edf1a74 (Al Viro 2019-04-15 22:26:51 -0400 329) .free_inode = sysv_free_in_core_inode,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 330) .write_inode = sysv_write_inode,
d299eadc09874 (Al Viro 2010-06-05 19:16:20 -0400 331) .evict_inode = sysv_evict_inode,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 332) .put_super = sysv_put_super,
ad43ffdeea0a7 (Christoph Hellwig 2009-06-08 10:07:45 +0200 333) .sync_fs = sysv_sync_fs,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 334) .remount_fs = sysv_remount,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 335) .statfs = sysv_statfs,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 336) };
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 337)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 338) int __init sysv_init_icache(void)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 339) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 340) sysv_inode_cachep = kmem_cache_create("sysv_inode_cache",
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 341) sizeof(struct sysv_inode_info), 0,
5d097056c9a01 (Vladimir Davydov 2016-01-14 15:18:21 -0800 342) SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|SLAB_ACCOUNT,
20c2df83d25c6 (Paul Mundt 2007-07-20 10:11:58 +0900 343) init_once);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 344) if (!sysv_inode_cachep)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 345) return -ENOMEM;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 346) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 347) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 348)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 349) void sysv_destroy_icache(void)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 350) {
8c0a85377048b (Kirill A. Shutemov 2012-09-26 11:33:07 +1000 351) /*
8c0a85377048b (Kirill A. Shutemov 2012-09-26 11:33:07 +1000 352) * Make sure all delayed rcu free inodes are flushed before we
8c0a85377048b (Kirill A. Shutemov 2012-09-26 11:33:07 +1000 353) * destroy cache.
8c0a85377048b (Kirill A. Shutemov 2012-09-26 11:33:07 +1000 354) */
8c0a85377048b (Kirill A. Shutemov 2012-09-26 11:33:07 +1000 355) rcu_barrier();
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 356) kmem_cache_destroy(sysv_inode_cachep);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 357) }
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
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