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btrfs: Document btrfs_csum_one_bio 

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2019-04-22 16:07:31 +03:00 committed by David Sterba
parent b8aa330d2a
commit 51d470aeaa
1 changed files with 10 additions and 0 deletions
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10
fs/btrfs/file-item.c
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@ -413,6 +413,16 @@ fail:
return ret; return ret;
} }
/*
* btrfs_csum_one_bio - Calculates checksums of the data contained inside a bio
* @inode: Owner of the data inside the bio
* @bio: Contains the data to be checksummed
* @file_start: offset in file this bio begins to describe
* @contig: Boolean. If true/1 means all bio vecs in this bio are
* contiguous and they begin at @file_start in the file. False/0
* means this bio can contains potentially discontigous bio vecs
* so the logical offset of each should be calculated separately.
*/
blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
u64 file_start, int contig) u64 file_start, int contig)
{ {