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| author | Anand Jain <anand.jain@oracle.com> | 2018-02-15 11:07:59 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-03-26 15:09:35 +0200 |
| commit | 566b1760b42be7c99c02e894b1ec9a707c2e83d1 (patch) | |
| tree | 6cee8bc71b76d1b0c6e43de1f78f28ebaa25cae7 /fs/btrfs | |
| parent | btrfs: cow_file_range() num_bytes and disk_num_bytes are same (diff) | |
| download | linux-566b1760b42be7c99c02e894b1ec9a707c2e83d1.tar.xz linux-566b1760b42be7c99c02e894b1ec9a707c2e83d1.zip | |
btrfs: use ASSERT to report logical error in cow_file_range()
Use ASSERT to report logical error in cow_file_range(), also move it a
bit closer to when the num_bytes is derived.
The extent start could be (u64)-1 in some cases, the assert should catch
that we do not accidentally pass it to cow_file_range.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/btrfs/inode.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index e90d7c597ef3..28491a82e645 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -978,6 +978,7 @@ static noinline int cow_file_range(struct inode *inode, num_bytes = ALIGN(end - start + 1, blocksize); num_bytes = max(blocksize, num_bytes); + ASSERT(num_bytes <= btrfs_super_total_bytes(fs_info->super_copy)); inode_should_defrag(BTRFS_I(inode), start, end, num_bytes, SZ_64K); @@ -1008,8 +1009,6 @@ static noinline int cow_file_range(struct inode *inode, } } - BUG_ON(num_bytes > btrfs_super_total_bytes(fs_info->super_copy)); - alloc_hint = get_extent_allocation_hint(inode, start, num_bytes); btrfs_drop_extent_cache(BTRFS_I(inode), start, start + num_bytes - 1, 0); |