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| author | Ilya Dryomov <idryomov@gmail.com> | 2018-01-20 10:30:10 +0100 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2018-04-02 10:12:38 +0200 |
| commit | 5359a17d2706b86da2af83027343d5eb256f7670 (patch) | |
| tree | 31053fe22a0d91b40911882b2aaa961e77504d4b /include/linux/ceph/osd_client.h | |
| parent | a1fbb5e7bbb56fccdf54bf4ab5086c6080ee5bfa (diff) | |
| download | talos-obmc-linux-5359a17d2706b86da2af83027343d5eb256f7670.tar.gz talos-obmc-linux-5359a17d2706b86da2af83027343d5eb256f7670.zip | |
libceph, rbd: new bio handling code (aka don't clone bios)
The reason we clone bios is to be able to give each object request
(and consequently each ceph_osd_data/ceph_msg_data item) its own
pointer to a (list of) bio(s). The messenger then initializes its
cursor with cloned bio's ->bi_iter, so it knows where to start reading
from/writing to. That's all the cloned bios are used for: to determine
each object request's starting position in the provided data buffer.
Introduce ceph_bio_iter to do exactly that -- store position within bio
list (i.e. pointer to bio) + position within that bio (i.e. bvec_iter).
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'include/linux/ceph/osd_client.h')
| -rw-r--r-- | include/linux/ceph/osd_client.h | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h index 52fb37d1c2a5..315691490cb0 100644 --- a/include/linux/ceph/osd_client.h +++ b/include/linux/ceph/osd_client.h @@ -72,8 +72,8 @@ struct ceph_osd_data { struct ceph_pagelist *pagelist; #ifdef CONFIG_BLOCK struct { - struct bio *bio; /* list of bios */ - size_t bio_length; /* total in list */ + struct ceph_bio_iter bio_pos; + u32 bio_length; }; #endif /* CONFIG_BLOCK */ }; @@ -405,9 +405,10 @@ extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *, unsigned int which, struct ceph_pagelist *pagelist); #ifdef CONFIG_BLOCK -extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *, - unsigned int which, - struct bio *bio, size_t bio_length); +void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, + unsigned int which, + struct ceph_bio_iter *bio_pos, + u32 bio_length); #endif /* CONFIG_BLOCK */ extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *, |
