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| author | Mikulas Patocka <mpatocka@redhat.com> | 2014-03-15 02:41:24 +0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2014-06-03 21:44:06 +0400 |
| commit | 1dd40c3ecd9b8a4ab91dbf2e6ce10b82a3b5ae63 (patch) | |
| tree | a1473eb0643c544ac9efa13911d6119a8078ed60 /include/linux/device-mapper.h | |
| parent | e0d6609a5fe34463ae2fd48d846931f70de8b37b (diff) | |
| download | linux-1dd40c3ecd9b8a4ab91dbf2e6ce10b82a3b5ae63.tar.xz | |
dm: introduce dm_accept_partial_bio
The function dm_accept_partial_bio allows the target to specify how many
sectors of the current bio it will process. If the target only wants to
accept part of the bio, it calls dm_accept_partial_bio and the DM core
sends the rest of the data in next bio.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'include/linux/device-mapper.h')
| -rw-r--r-- | include/linux/device-mapper.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 63da56ed9796..0adca299f238 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -291,6 +291,7 @@ struct dm_target_io { struct dm_io *io; struct dm_target *ti; unsigned target_bio_nr; + unsigned *len_ptr; struct bio clone; }; @@ -401,6 +402,7 @@ int dm_copy_name_and_uuid(struct mapped_device *md, char *name, char *uuid); struct gendisk *dm_disk(struct mapped_device *md); int dm_suspended(struct dm_target *ti); int dm_noflush_suspending(struct dm_target *ti); +void dm_accept_partial_bio(struct bio *bio, unsigned n_sectors); union map_info *dm_get_rq_mapinfo(struct request *rq); struct queue_limits *dm_get_queue_limits(struct mapped_device *md); |