Commit e0cfbb2c authored by Christoph Hellwig's avatar Christoph Hellwig Committed by David Sterba
Browse files

btrfs: better document struct btrfs_bio 



Update the comments on btrfs_bio to better describe the structure.

Reviewed-by: default avatarAnand Jain <anand.jain@oracle.com>
Reviewed-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent fd8f8ede

fs/btrfs/bio.h

+4 −5
Original line number Diff line number Diff line
@@ -26,9 +26,8 @@ struct btrfs_fs_info; 
typedef void (*btrfs_bio_end_io_t)(struct btrfs_bio *bbio);



/*

 * Additional info to pass along bio.

 *

 * Mostly for btrfs specific features like csum and mirror_num.

 * Highlevel btrfs I/O structure.  It is allocated by btrfs_bio_alloc and

 * passed to btrfs_submit_bio for mapping to the physical devices.

 */

struct btrfs_bio {

	unsigned int mirror_num:7;
@@ -42,7 +41,7 @@ struct btrfs_bio { 
	unsigned int is_metadata:1;

	struct bvec_iter iter;



	/* for direct I/O */

	/* File offset that this I/O operates on. */

	u64 file_offset;



	/* @device is for stripe IO submission. */
@@ -62,7 +61,7 @@ struct btrfs_bio { 
	btrfs_bio_end_io_t end_io;

	void *private;



	/* For read end I/O handling */

	/* For internal use in read end I/O handling */

	struct work_struct end_io_work;



	/*