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ext4: move call to ext4_error() into ext4_xattr_check_block()

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Refactor the call to EXT4_ERROR_INODE() into ext4_xattr_check_block().
This simplifies the code, and fixes a problem where not all callers of
ext4_xattr_check_block() were not resulting in ext4_error() getting
called when the xattr block is corrupted.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
This commit is contained in:
Theodore Ts'o 2018-03-30 15:42:25 -04:00
parent 27f394a771
commit de05ca8526
1 changed files with 27 additions and 33 deletions
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60
fs/ext4/xattr.c
View file

@ -225,25 +225,36 @@ ext4_xattr_check_entries(struct ext4_xattr_entry *entry, void *end,
}
static inline int
ext4_xattr_check_block(struct inode *inode, struct buffer_head *bh)
__ext4_xattr_check_block(struct inode *inode, struct buffer_head *bh,
const char *function, unsigned int line)
{
int error;
int error = -EFSCORRUPTED;
if (buffer_verified(bh))
return 0;
if (BHDR(bh)->h_magic != cpu_to_le32(EXT4_XATTR_MAGIC) ||
BHDR(bh)->h_blocks != cpu_to_le32(1))
return -EFSCORRUPTED;
goto errout;
error = -EFSBADCRC;
if (!ext4_xattr_block_csum_verify(inode, bh))
return -EFSBADCRC;
goto errout;
error = ext4_xattr_check_entries(BFIRST(bh), bh->b_data + bh->b_size,
bh->b_data);
if (!error)
errout:
if (error)
__ext4_error_inode(inode, function, line, 0,
"corrupted xattr block %llu",
(unsigned long long) bh->b_blocknr);
else
set_buffer_verified(bh);
return error;
}
#define ext4_xattr_check_block(inode, bh) \
__ext4_xattr_check_block((inode), (bh), __func__, __LINE__)
static int
__xattr_check_inode(struct inode *inode, struct ext4_xattr_ibody_header *header,
void *end, const char *function, unsigned int line)
@ -514,12 +525,9 @@ ext4_xattr_block_get(struct inode *inode, int name_index, const char *name,
goto cleanup;
ea_bdebug(bh, "b_count=%d, refcount=%d",
atomic_read(&(bh->b_count)), le32_to_cpu(BHDR(bh)->h_refcount));
if (ext4_xattr_check_block(inode, bh)) {
EXT4_ERROR_INODE(inode, "bad block %llu",
EXT4_I(inode)->i_file_acl);
error = -EFSCORRUPTED;
error = ext4_xattr_check_block(inode, bh);
if (error)
goto cleanup;
}
ext4_xattr_block_cache_insert(ea_block_cache, bh);
entry = BFIRST(bh);
error = ext4_xattr_find_entry(&entry, name_index, name, 1);
@ -679,12 +687,9 @@ ext4_xattr_block_list(struct dentry *dentry, char *buffer, size_t buffer_size)
goto cleanup;
ea_bdebug(bh, "b_count=%d, refcount=%d",
atomic_read(&(bh->b_count)), le32_to_cpu(BHDR(bh)->h_refcount));
if (ext4_xattr_check_block(inode, bh)) {
EXT4_ERROR_INODE(inode, "bad block %llu",
EXT4_I(inode)->i_file_acl);
error = -EFSCORRUPTED;
error = ext4_xattr_check_block(inode, bh);
if (error)
goto cleanup;
}
ext4_xattr_block_cache_insert(EA_BLOCK_CACHE(inode), bh);
error = ext4_xattr_list_entries(dentry, BFIRST(bh), buffer, buffer_size);
@ -811,10 +816,9 @@ int ext4_get_inode_usage(struct inode *inode, qsize_t *usage)
goto out;
}
if (ext4_xattr_check_block(inode, bh)) {
ret = -EFSCORRUPTED;
ret = ext4_xattr_check_block(inode, bh);
if (ret)
goto out;
}
for (entry = BFIRST(bh); !IS_LAST_ENTRY(entry);
entry = EXT4_XATTR_NEXT(entry))
@ -1796,12 +1800,9 @@ ext4_xattr_block_find(struct inode *inode, struct ext4_xattr_info *i,
ea_bdebug(bs->bh, "b_count=%d, refcount=%d",
atomic_read(&(bs->bh->b_count)),
le32_to_cpu(BHDR(bs->bh)->h_refcount));
if (ext4_xattr_check_block(inode, bs->bh)) {
EXT4_ERROR_INODE(inode, "bad block %llu",
EXT4_I(inode)->i_file_acl);
error = -EFSCORRUPTED;
error = ext4_xattr_check_block(inode, bs->bh);
if (error)
goto cleanup;
}
/* Find the named attribute. */
bs->s.base = BHDR(bs->bh);
bs->s.first = BFIRST(bs->bh);
@ -2724,13 +2725,9 @@ int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
error = -EIO;
if (!bh)
goto cleanup;
if (ext4_xattr_check_block(inode, bh)) {
EXT4_ERROR_INODE(inode, "bad block %llu",
EXT4_I(inode)->i_file_acl);
error = -EFSCORRUPTED;
brelse(bh);
error = ext4_xattr_check_block(inode, bh);
if (error)
goto cleanup;
}
base = BHDR(bh);
end = bh->b_data + bh->b_size;
min_offs = end - base;
@ -2887,11 +2884,8 @@ int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode,
goto cleanup;
}
error = ext4_xattr_check_block(inode, bh);
if (error) {
EXT4_ERROR_INODE(inode, "bad block %llu (error %d)",
EXT4_I(inode)->i_file_acl, error);
if (error)
goto cleanup;
}
if (ext4_has_feature_ea_inode(inode->i_sb)) {
for (entry = BFIRST(bh); !IS_LAST_ENTRY(entry);