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authorMikulas Patocka <mpatocka@redhat.com>2014-03-15 02:41:24 +0400
committerMike Snitzer <snitzer@redhat.com>2014-06-03 21:44:06 +0400
commit1dd40c3ecd9b8a4ab91dbf2e6ce10b82a3b5ae63 (patch)
treea1473eb0643c544ac9efa13911d6119a8078ed60 /include/linux/device-mapper.h
parente0d6609a5fe34463ae2fd48d846931f70de8b37b (diff)
downloadlinux-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.h2
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);