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authorIlya Dryomov <idryomov@gmail.com>2016-04-29 20:54:20 +0300
committerIlya Dryomov <idryomov@gmail.com>2016-05-26 01:36:22 +0300
commitd30291b985d1854565d7f2c82a4457869d5265e8 (patch)
tree43b99c978c5e4ea321d72590dfeebd42c10de28e /drivers/block
parent711da55d36a6f1eddcd340969be7223110d2f6b0 (diff)
downloadlinux-d30291b985d1854565d7f2c82a4457869d5265e8.tar.xz
libceph: variable-sized ceph_object_id
Currently ceph_object_id can hold object names of up to 100 (CEPH_MAX_OID_NAME_LEN) characters. This is enough for all use cases, expect one - long rbd image names: - a format 1 header is named "<imgname>.rbd" - an object that points to a format 2 header is named "rbd_id.<imgname>" We operate on these potentially long-named objects during rbd map, and, for format 1 images, during header refresh. (A format 2 header name is a small system-generated string.) Lift this 100 character limit by making ceph_object_id be able to point to an externally-allocated string. Apart from being able to work with almost arbitrarily-long named objects, this allows us to reduce the size of ceph_object_id from >100 bytes to 64 bytes. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/rbd.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index bda4deade82e..3bf93a2a20f0 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1965,7 +1965,9 @@ static struct ceph_osd_request *rbd_osd_req_create(
osd_req->r_priv = obj_request;
osd_req->r_base_oloc.pool = ceph_file_layout_pg_pool(rbd_dev->layout);
- ceph_oid_set_name(&osd_req->r_base_oid, obj_request->object_name);
+ if (ceph_oid_aprintf(&osd_req->r_base_oid, GFP_NOIO, "%s",
+ obj_request->object_name))
+ goto fail;
if (ceph_osdc_alloc_messages(osd_req, GFP_NOIO))
goto fail;
@@ -2017,7 +2019,9 @@ rbd_osd_req_create_copyup(struct rbd_obj_request *obj_request)
osd_req->r_priv = obj_request;
osd_req->r_base_oloc.pool = ceph_file_layout_pg_pool(rbd_dev->layout);
- ceph_oid_set_name(&osd_req->r_base_oid, obj_request->object_name);
+ if (ceph_oid_aprintf(&osd_req->r_base_oid, GFP_NOIO, "%s",
+ obj_request->object_name))
+ goto fail;
if (ceph_osdc_alloc_messages(osd_req, GFP_NOIO))
goto fail;