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/ufs/util.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 4) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 5) * Copyright (C) 1998
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 6) * Daniel Pirkl <daniel.pirkl@email.cz>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 7) * Charles University, Faculty of Mathematics and Physics
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 8) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 9)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 10) #include <linux/string.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 11) #include <linux/slab.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 12) #include <linux/buffer_head.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 13)
e542059884bb6 (Mike Frysinger 2008-02-08 04:21:31 -0800 14) #include "ufs_fs.h"
bcd6d4ecf6868 (Christoph Hellwig 2007-10-16 23:26:51 -0700 15) #include "ufs.h"
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 16) #include "swab.h"
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 17) #include "util.h"
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 18)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 19) struct ufs_buffer_head * _ubh_bread_ (struct ufs_sb_private_info * uspi,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 20) struct super_block *sb, u64 fragment, u64 size)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 21) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 22) struct ufs_buffer_head * ubh;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 23) unsigned i, j ;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 24) u64 count = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 25) if (size & ~uspi->s_fmask)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 26) return NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 27) count = size >> uspi->s_fshift;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 28) if (count > UFS_MAXFRAG)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 29) return NULL;
194c8767cef58 (Zhang Yanfei 2013-03-12 13:37:05 +0800 30) ubh = kmalloc (sizeof (struct ufs_buffer_head), GFP_NOFS);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 31) if (!ubh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 32) return NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 33) ubh->fragment = fragment;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 34) ubh->count = count;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 35) for (i = 0; i < count; i++)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 36) if (!(ubh->bh[i] = sb_bread(sb, fragment + i)))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 37) goto failed;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 38) for (; i < UFS_MAXFRAG; i++)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 39) ubh->bh[i] = NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 40) return ubh;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 41) failed:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 42) for (j = 0; j < i; j++)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 43) brelse (ubh->bh[j]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 44) kfree(ubh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 45) return NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 46) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 47)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 48) struct ufs_buffer_head * ubh_bread_uspi (struct ufs_sb_private_info * uspi,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 49) struct super_block *sb, u64 fragment, u64 size)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 50) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 51) unsigned i, j;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 52) u64 count = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 53) if (size & ~uspi->s_fmask)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 54) return NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 55) count = size >> uspi->s_fshift;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 56) if (count <= 0 || count > UFS_MAXFRAG)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 57) return NULL;
9695ef16ed4e0 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 58) USPI_UBH(uspi)->fragment = fragment;
9695ef16ed4e0 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 59) USPI_UBH(uspi)->count = count;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 60) for (i = 0; i < count; i++)
9695ef16ed4e0 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 61) if (!(USPI_UBH(uspi)->bh[i] = sb_bread(sb, fragment + i)))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 62) goto failed;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 63) for (; i < UFS_MAXFRAG; i++)
9695ef16ed4e0 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 64) USPI_UBH(uspi)->bh[i] = NULL;
9695ef16ed4e0 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 65) return USPI_UBH(uspi);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 66) failed:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 67) for (j = 0; j < i; j++)
9695ef16ed4e0 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 68) brelse (USPI_UBH(uspi)->bh[j]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 69) return NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 70) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 71)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 72) void ubh_brelse (struct ufs_buffer_head * ubh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 73) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 74) unsigned i;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 75) if (!ubh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 76) return;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 77) for (i = 0; i < ubh->count; i++)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 78) brelse (ubh->bh[i]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 79) kfree (ubh);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 80) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 81)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 82) void ubh_brelse_uspi (struct ufs_sb_private_info * uspi)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 83) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 84) unsigned i;
9695ef16ed4e0 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 85) if (!USPI_UBH(uspi))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 86) return;
9695ef16ed4e0 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 87) for ( i = 0; i < USPI_UBH(uspi)->count; i++ ) {
9695ef16ed4e0 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 88) brelse (USPI_UBH(uspi)->bh[i]);
9695ef16ed4e0 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 89) USPI_UBH(uspi)->bh[i] = NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 90) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 91) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 92)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 93) void ubh_mark_buffer_dirty (struct ufs_buffer_head * ubh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 94) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 95) unsigned i;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 96) if (!ubh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 97) return;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 98) for ( i = 0; i < ubh->count; i++ )
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 99) mark_buffer_dirty (ubh->bh[i]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 100) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 101)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 102) void ubh_mark_buffer_uptodate (struct ufs_buffer_head * ubh, int flag)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 103) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 104) unsigned i;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 105) if (!ubh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 106) return;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 107) if (flag) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 108) for ( i = 0; i < ubh->count; i++ )
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 109) set_buffer_uptodate (ubh->bh[i]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 110) } else {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 111) for ( i = 0; i < ubh->count; i++ )
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 112) clear_buffer_uptodate (ubh->bh[i]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 113) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 114) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 115)
9cb569d601e0b (Christoph Hellwig 2010-08-11 17:06:24 +0200 116) void ubh_sync_block(struct ufs_buffer_head *ubh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 117) {
9cb569d601e0b (Christoph Hellwig 2010-08-11 17:06:24 +0200 118) if (ubh) {
9cb569d601e0b (Christoph Hellwig 2010-08-11 17:06:24 +0200 119) unsigned i;
098d5af7be694 (Evgeniy Dushistov 2006-06-25 05:47:31 -0700 120)
9cb569d601e0b (Christoph Hellwig 2010-08-11 17:06:24 +0200 121) for (i = 0; i < ubh->count; i++)
2a222ca992c35 (Mike Christie 2016-06-05 14:31:43 -0500 122) write_dirty_buffer(ubh->bh[i], 0);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 123)
9cb569d601e0b (Christoph Hellwig 2010-08-11 17:06:24 +0200 124) for (i = 0; i < ubh->count; i++)
9cb569d601e0b (Christoph Hellwig 2010-08-11 17:06:24 +0200 125) wait_on_buffer(ubh->bh[i]);
9cb569d601e0b (Christoph Hellwig 2010-08-11 17:06:24 +0200 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) void ubh_bforget (struct ufs_buffer_head * ubh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 130) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 131) unsigned i;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 132) if (!ubh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 133) return;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 134) for ( i = 0; i < ubh->count; i++ ) if ( ubh->bh[i] )
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 135) bforget (ubh->bh[i]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 136) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 137)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 138) int ubh_buffer_dirty (struct ufs_buffer_head * ubh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 139) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 140) unsigned i;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 141) unsigned result = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 142) if (!ubh)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 143) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 144) for ( i = 0; i < ubh->count; i++ )
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 145) result |= buffer_dirty(ubh->bh[i]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 146) return result;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 147) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 148)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 149) void _ubh_ubhcpymem_(struct ufs_sb_private_info * uspi,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 150) unsigned char * mem, struct ufs_buffer_head * ubh, unsigned size)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 151) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 152) unsigned len, bhno;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 153) if (size > (ubh->count << uspi->s_fshift))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 154) size = ubh->count << uspi->s_fshift;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 155) bhno = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 156) while (size) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 157) len = min_t(unsigned int, size, uspi->s_fsize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 158) memcpy (mem, ubh->bh[bhno]->b_data, len);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 159) mem += uspi->s_fsize;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 160) size -= len;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 161) bhno++;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 162) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 163) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 164)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 165) void _ubh_memcpyubh_(struct ufs_sb_private_info * uspi,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 166) struct ufs_buffer_head * ubh, unsigned char * mem, unsigned size)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 167) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 168) unsigned len, bhno;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 169) if (size > (ubh->count << uspi->s_fshift))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 170) size = ubh->count << uspi->s_fshift;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 171) bhno = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 172) while (size) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 173) len = min_t(unsigned int, size, uspi->s_fsize);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 174) memcpy (ubh->bh[bhno]->b_data, mem, len);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 175) mem += uspi->s_fsize;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 176) size -= len;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 177) bhno++;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 178) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 179) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 180)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 181) dev_t
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 182) ufs_get_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 183) {
44aa5359be589 (Al Viro 2006-08-13 01:54:30 -0400 184) __u32 fs32;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 185) dev_t dev;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 186)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 187) if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
44aa5359be589 (Al Viro 2006-08-13 01:54:30 -0400 188) fs32 = fs32_to_cpu(sb, ufsi->i_u1.i_data[1]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 189) else
44aa5359be589 (Al Viro 2006-08-13 01:54:30 -0400 190) fs32 = fs32_to_cpu(sb, ufsi->i_u1.i_data[0]);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 191) switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 192) case UFS_ST_SUNx86:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 193) case UFS_ST_SUN:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 194) if ((fs32 & 0xffff0000) == 0 ||
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 195) (fs32 & 0xffff0000) == 0xffff0000)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 196) dev = old_decode_dev(fs32 & 0x7fff);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 197) else
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 198) dev = MKDEV(sysv_major(fs32), sysv_minor(fs32));
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 199) break;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 200)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 201) default:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 202) dev = old_decode_dev(fs32);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 203) break;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 204) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 205) return dev;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 206) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 207)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 208) void
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 209) ufs_set_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi, dev_t dev)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 210) {
44aa5359be589 (Al Viro 2006-08-13 01:54:30 -0400 211) __u32 fs32;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 212)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 213) switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 214) case UFS_ST_SUNx86:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 215) case UFS_ST_SUN:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 216) fs32 = sysv_encode_dev(dev);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 217) if ((fs32 & 0xffff8000) == 0) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 218) fs32 = old_encode_dev(dev);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 219) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 220) break;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 221)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 222) default:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 223) fs32 = old_encode_dev(dev);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 224) break;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 225) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 226) if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
44aa5359be589 (Al Viro 2006-08-13 01:54:30 -0400 227) ufsi->i_u1.i_data[1] = cpu_to_fs32(sb, fs32);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 228) else
44aa5359be589 (Al Viro 2006-08-13 01:54:30 -0400 229) ufsi->i_u1.i_data[0] = cpu_to_fs32(sb, fs32);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 230) }
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 231)
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 232) /**
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 233) * ufs_get_locked_page() - locate, pin and lock a pagecache page, if not exist
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 234) * read it from disk.
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 235) * @mapping: the address_space to search
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 236) * @index: the page index
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 237) *
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 238) * Locates the desired pagecache page, if not exist we'll read it,
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 239) * locks it, increments its reference
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 240) * count and returns its address.
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 241) *
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 242) */
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 243)
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 244) struct page *ufs_get_locked_page(struct address_space *mapping,
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 245) pgoff_t index)
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 246) {
267309f394bf3 (Al Viro 2017-06-14 23:32:19 -0400 247) struct inode *inode = mapping->host;
267309f394bf3 (Al Viro 2017-06-14 23:32:19 -0400 248) struct page *page = find_lock_page(mapping, index);
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 249) if (!page) {
6fe6900e1e5b6 (Nicholas Piggin 2007-05-06 14:49:04 -0700 250) page = read_mapping_page(mapping, index, NULL);
1fb32b7bd8203 (Evgeniy Dushistov 2006-08-05 12:13:55 -0700 251)
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 252) if (IS_ERR(page)) {
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 253) printk(KERN_ERR "ufs_change_blocknr: "
6fe6900e1e5b6 (Nicholas Piggin 2007-05-06 14:49:04 -0700 254) "read_mapping_page error: ino %lu, index: %lu\n",
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 255) mapping->host->i_ino, index);
267309f394bf3 (Al Viro 2017-06-14 23:32:19 -0400 256) return page;
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 257) }
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 258)
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 259) lock_page(page);
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 260)
1fb32b7bd8203 (Evgeniy Dushistov 2006-08-05 12:13:55 -0700 261) if (unlikely(page->mapping == NULL)) {
1fb32b7bd8203 (Evgeniy Dushistov 2006-08-05 12:13:55 -0700 262) /* Truncate got there first */
1fb32b7bd8203 (Evgeniy Dushistov 2006-08-05 12:13:55 -0700 263) unlock_page(page);
09cbfeaf1a5a6 (Kirill A. Shutemov 2016-04-01 15:29:47 +0300 264) put_page(page);
267309f394bf3 (Al Viro 2017-06-14 23:32:19 -0400 265) return NULL;
1fb32b7bd8203 (Evgeniy Dushistov 2006-08-05 12:13:55 -0700 266) }
1fb32b7bd8203 (Evgeniy Dushistov 2006-08-05 12:13:55 -0700 267)
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 268) if (!PageUptodate(page) || PageError(page)) {
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 269) unlock_page(page);
09cbfeaf1a5a6 (Kirill A. Shutemov 2016-04-01 15:29:47 +0300 270) put_page(page);
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 271)
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 272) printk(KERN_ERR "ufs_change_blocknr: "
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 273) "can not read page: ino %lu, index: %lu\n",
267309f394bf3 (Al Viro 2017-06-14 23:32:19 -0400 274) inode->i_ino, index);
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 275)
267309f394bf3 (Al Viro 2017-06-14 23:32:19 -0400 276) return ERR_PTR(-EIO);
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 277) }
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 278) }
267309f394bf3 (Al Viro 2017-06-14 23:32:19 -0400 279) if (!page_has_buffers(page))
267309f394bf3 (Al Viro 2017-06-14 23:32:19 -0400 280) create_empty_buffers(page, 1 << inode->i_blkbits, 0);
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 281) return page;
10e5dce07e6f8 (Evgeniy Dushistov 2006-07-01 04:36:24 -0700 282) }
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
More than 9999 Commits
32 Branches
54 Tags