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Diffstat (limited to 'fs/ext4/ialloc.c')
-rw-r--r--fs/ext4/ialloc.c113
1 files changed, 75 insertions, 38 deletions
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 619bfc1fd..1b8024d26 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -64,7 +64,7 @@ void ext4_mark_bitmap_end(int start_bit, int end_bit, char *bitmap)
}
/* Initializes an uninitialized inode bitmap */
-static unsigned ext4_init_inode_bitmap(struct super_block *sb,
+static int ext4_init_inode_bitmap(struct super_block *sb,
struct buffer_head *bh,
ext4_group_t block_group,
struct ext4_group_desc *gdp)
@@ -89,7 +89,7 @@ static unsigned ext4_init_inode_bitmap(struct super_block *sb,
count);
}
set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state);
- return 0;
+ return -EFSBADCRC;
}
memset(bh->b_data, 0, (EXT4_INODES_PER_GROUP(sb) + 7) / 8);
@@ -99,7 +99,7 @@ static unsigned ext4_init_inode_bitmap(struct super_block *sb,
EXT4_INODES_PER_GROUP(sb) / 8);
ext4_group_desc_csum_set(sb, block_group, gdp);
- return EXT4_INODES_PER_GROUP(sb);
+ return 0;
}
void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate)
@@ -112,6 +112,42 @@ void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate)
put_bh(bh);
}
+static int ext4_validate_inode_bitmap(struct super_block *sb,
+ struct ext4_group_desc *desc,
+ ext4_group_t block_group,
+ struct buffer_head *bh)
+{
+ ext4_fsblk_t blk;
+ struct ext4_group_info *grp = ext4_get_group_info(sb, block_group);
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+ if (buffer_verified(bh))
+ return 0;
+ if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp))
+ return -EFSCORRUPTED;
+
+ ext4_lock_group(sb, block_group);
+ blk = ext4_inode_bitmap(sb, desc);
+ if (!ext4_inode_bitmap_csum_verify(sb, block_group, desc, bh,
+ EXT4_INODES_PER_GROUP(sb) / 8)) {
+ ext4_unlock_group(sb, block_group);
+ ext4_error(sb, "Corrupt inode bitmap - block_group = %u, "
+ "inode_bitmap = %llu", block_group, blk);
+ grp = ext4_get_group_info(sb, block_group);
+ if (!EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) {
+ int count;
+ count = ext4_free_inodes_count(sb, desc);
+ percpu_counter_sub(&sbi->s_freeinodes_counter,
+ count);
+ }
+ set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state);
+ return -EFSBADCRC;
+ }
+ set_buffer_verified(bh);
+ ext4_unlock_group(sb, block_group);
+ return 0;
+}
+
/*
* Read the inode allocation bitmap for a given block_group, reading
* into the specified slot in the superblock's bitmap cache.
@@ -124,12 +160,11 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
struct ext4_group_desc *desc;
struct buffer_head *bh = NULL;
ext4_fsblk_t bitmap_blk;
- struct ext4_group_info *grp;
- struct ext4_sb_info *sbi = EXT4_SB(sb);
+ int err;
desc = ext4_get_group_desc(sb, block_group, NULL);
if (!desc)
- return NULL;
+ return ERR_PTR(-EFSCORRUPTED);
bitmap_blk = ext4_inode_bitmap(sb, desc);
bh = sb_getblk(sb, bitmap_blk);
@@ -137,7 +172,7 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
ext4_error(sb, "Cannot read inode bitmap - "
"block_group = %u, inode_bitmap = %llu",
block_group, bitmap_blk);
- return NULL;
+ return ERR_PTR(-EIO);
}
if (bitmap_uptodate(bh))
goto verify;
@@ -150,12 +185,14 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
ext4_lock_group(sb, block_group);
if (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) {
- ext4_init_inode_bitmap(sb, bh, block_group, desc);
+ err = ext4_init_inode_bitmap(sb, bh, block_group, desc);
set_bitmap_uptodate(bh);
set_buffer_uptodate(bh);
set_buffer_verified(bh);
ext4_unlock_group(sb, block_group);
unlock_buffer(bh);
+ if (err)
+ goto out;
return bh;
}
ext4_unlock_group(sb, block_group);
@@ -182,31 +219,17 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
ext4_error(sb, "Cannot read inode bitmap - "
"block_group = %u, inode_bitmap = %llu",
block_group, bitmap_blk);
- return NULL;
+ return ERR_PTR(-EIO);
}
verify:
- ext4_lock_group(sb, block_group);
- if (!buffer_verified(bh) &&
- !ext4_inode_bitmap_csum_verify(sb, block_group, desc, bh,
- EXT4_INODES_PER_GROUP(sb) / 8)) {
- ext4_unlock_group(sb, block_group);
- put_bh(bh);
- ext4_error(sb, "Corrupt inode bitmap - block_group = %u, "
- "inode_bitmap = %llu", block_group, bitmap_blk);
- grp = ext4_get_group_info(sb, block_group);
- if (!EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) {
- int count;
- count = ext4_free_inodes_count(sb, desc);
- percpu_counter_sub(&sbi->s_freeinodes_counter,
- count);
- }
- set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, &grp->bb_state);
- return NULL;
- }
- ext4_unlock_group(sb, block_group);
- set_buffer_verified(bh);
+ err = ext4_validate_inode_bitmap(sb, desc, block_group, bh);
+ if (err)
+ goto out;
return bh;
+out:
+ put_bh(bh);
+ return ERR_PTR(err);
}
/*
@@ -286,8 +309,15 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
bitmap_bh = ext4_read_inode_bitmap(sb, block_group);
/* Don't bother if the inode bitmap is corrupt. */
grp = ext4_get_group_info(sb, block_group);
- if (unlikely(EXT4_MB_GRP_IBITMAP_CORRUPT(grp)) || !bitmap_bh)
+ if (IS_ERR(bitmap_bh)) {
+ fatal = PTR_ERR(bitmap_bh);
+ bitmap_bh = NULL;
+ goto error_return;
+ }
+ if (unlikely(EXT4_MB_GRP_IBITMAP_CORRUPT(grp))) {
+ fatal = -EFSCORRUPTED;
goto error_return;
+ }
BUFFER_TRACE(bitmap_bh, "get_write_access");
fatal = ext4_journal_get_write_access(handle, bitmap_bh);
@@ -826,7 +856,9 @@ got_group:
brelse(inode_bitmap_bh);
inode_bitmap_bh = ext4_read_inode_bitmap(sb, group);
/* Skip groups with suspicious inode tables */
- if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp) || !inode_bitmap_bh) {
+ if (EXT4_MB_GRP_IBITMAP_CORRUPT(grp) ||
+ IS_ERR(inode_bitmap_bh)) {
+ inode_bitmap_bh = NULL;
if (++group == ngroups)
group = 0;
continue;
@@ -902,8 +934,8 @@ got:
struct buffer_head *block_bitmap_bh;
block_bitmap_bh = ext4_read_block_bitmap(sb, group);
- if (!block_bitmap_bh) {
- err = -EIO;
+ if (IS_ERR(block_bitmap_bh)) {
+ err = PTR_ERR(block_bitmap_bh);
goto out;
}
BUFFER_TRACE(block_bitmap_bh, "get block bitmap access");
@@ -1045,7 +1077,7 @@ got:
ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize;
ei->i_inline_off = 0;
- if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_INLINE_DATA))
+ if (ext4_has_feature_inline_data(sb))
ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
ret = inode;
err = dquot_alloc_inode(inode);
@@ -1060,7 +1092,7 @@ got:
if (err)
goto fail_free_drop;
- if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) {
+ if (ext4_has_feature_extents(sb)) {
/* set extent flag only for directory, file and normal symlink*/
if (S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode)) {
ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS);
@@ -1116,14 +1148,17 @@ struct inode *ext4_orphan_get(struct super_block *sb, unsigned long ino)
/* Error cases - e2fsck has already cleaned up for us */
if (ino > max_ino) {
ext4_warning(sb, "bad orphan ino %lu! e2fsck was run?", ino);
+ err = -EFSCORRUPTED;
goto error;
}
block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb);
bit = (ino - 1) % EXT4_INODES_PER_GROUP(sb);
bitmap_bh = ext4_read_inode_bitmap(sb, block_group);
- if (!bitmap_bh) {
- ext4_warning(sb, "inode bitmap error for orphan %lu", ino);
+ if (IS_ERR(bitmap_bh)) {
+ err = PTR_ERR(bitmap_bh);
+ ext4_warning(sb, "inode bitmap error %ld for orphan %lu",
+ ino, err);
goto error;
}
@@ -1198,8 +1233,10 @@ unsigned long ext4_count_free_inodes(struct super_block *sb)
desc_count += ext4_free_inodes_count(sb, gdp);
brelse(bitmap_bh);
bitmap_bh = ext4_read_inode_bitmap(sb, i);
- if (!bitmap_bh)
+ if (IS_ERR(bitmap_bh)) {
+ bitmap_bh = NULL;
continue;
+ }
x = ext4_count_free(bitmap_bh->b_data,
EXT4_INODES_PER_GROUP(sb) / 8);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-16 15:28:45 +0000