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libceph: move message allocation out of ceph_osdc_alloc_request()

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The size of ->r_request and ->r_reply messages depends on the size of
the object name (ceph_object_id), while the size of ceph_osd_request is
fixed.  Move message allocation into a separate function that would
have to be called after ceph_object_id and ceph_object_locator (which
is also going to become variable in size with RADOS namespaces) have
been filled in:

    req = ceph_osdc_alloc_request(...);
    <fill in req->r_base_oid>
    <fill in req->r_base_oloc>
    ceph_osdc_alloc_messages(req);

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov
2016-04-27 14:15:51 +02:00
parent 841272825b
commit 13d1ad16d0
5 changed files with 82 additions and 40 deletions
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include/linux/ceph/osd_client.h
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@@ -322,6 +322,7 @@ extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *
unsigned int num_ops,
bool use_mempool,
gfp_t gfp_flags);
int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp);
extern void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
struct ceph_snap_context *snapc,