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btrfs: User assert to document transaction requirement 

Using an ASSERT in btrfs_pin_extent allows to more stringently observe
whether the function is called under a transaction or not.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2019-10-08 16:26:16 +03:00 committed by David Sterba
parent 67439dadb0
commit ce6d3eb6fd
1 changed files with 2 additions and 3 deletions
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5
fs/btrfs/extent-tree.c
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@ -2590,14 +2590,13 @@ static int pin_down_extent(struct btrfs_block_group_cache *cache,
return 0; return 0;
} }
/*
* this function must be called within transaction
*/
int btrfs_pin_extent(struct btrfs_fs_info *fs_info, int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
u64 bytenr, u64 num_bytes, int reserved) u64 bytenr, u64 num_bytes, int reserved)
{ {
struct btrfs_block_group_cache *cache; struct btrfs_block_group_cache *cache;
ASSERT(fs_info->running_transaction);
cache = btrfs_lookup_block_group(fs_info, bytenr); cache = btrfs_lookup_block_group(fs_info, bytenr);
BUG_ON(!cache); /* Logic error */ BUG_ON(!cache); /* Logic error */