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hpfs: support hotfixes

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When the OS/2 driver hits a disk write error, it writes the sector to
another location and adds the sector mapping to the hotfix map.

This patch makes the hpfs driver understand the hotfix map and remap
accesses accoring to it.

Signed-off-by: Mikulas Patocka <mikulas@twibright.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mikulas Patocka
2015-09-02 22:50:12 +02:00
committed by Linus Torvalds
parent 64291f7db5
commit a64eefaac1
5 changed files with 76 additions and 20 deletions
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15
fs/hpfs/super.c
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@@ -628,6 +628,9 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
goto bail4;
}
if (spareblock->n_spares_used)
hpfs_load_hotfix_map(s, spareblock);
/* Load bitmap directory */
if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps))))
goto bail4;
@@ -647,18 +650,6 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
mark_buffer_dirty(bh2);
}
if (spareblock->hotfixes_used || spareblock->n_spares_used) {
if (errs >= 2) {
pr_err("Hotfixes not supported here, try chkdsk\n");
mark_dirty(s, 0);
goto bail4;
}
hpfs_error(s, "hotfixes not supported here, try chkdsk");
if (errs == 0)
pr_err("Proceeding, but your filesystem will be probably corrupted by this driver...\n");
else
pr_err("This driver may read bad files or crash when operating on disk with hotfixes.\n");
}
if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) {
if (errs >= 2) {
pr_err("Spare dnodes used, try chkdsk\n");