diff options
| author | Jeff Layton <jlayton@kernel.org> | 2022-03-14 15:47:18 -0400 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2023-08-22 09:01:47 +0200 |
| commit | 08b8a0440eeec83f8330349f829908858fd52d31 (patch) | |
| tree | b4eb65a8149b193d7d7baf002f2dfdcccd301b12 /net/ceph | |
| parent | 706a741595047797872e669b3101429ab8d378ef (diff) | |
libceph: add spinlock around osd->o_requests
In a later patch, we're going to need to search for a request in
the rbtree, but taking the o_mutex is inconvenient as we already
hold the con mutex at the point where we need it.
Add a new spinlock that we take when inserting and erasing entries from
the o_requests tree. Search of the rbtree can be done with either the
mutex or the spinlock, but insertion and removal requires both.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-and-tested-by: Luís Henriques <lhenriques@suse.de>
Reviewed-by: Milind Changire <mchangir@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'net/ceph')
| -rw-r--r-- | net/ceph/osd_client.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 658a6f2320cf..6d7a430bfed8 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -1177,6 +1177,7 @@ static void osd_init(struct ceph_osd *osd) { refcount_set(&osd->o_ref, 1); RB_CLEAR_NODE(&osd->o_node); + spin_lock_init(&osd->o_requests_lock); osd->o_requests = RB_ROOT; osd->o_linger_requests = RB_ROOT; osd->o_backoff_mappings = RB_ROOT; @@ -1406,7 +1407,9 @@ static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req) atomic_inc(&osd->o_osdc->num_homeless); get_osd(osd); + spin_lock(&osd->o_requests_lock); insert_request(&osd->o_requests, req); + spin_unlock(&osd->o_requests_lock); req->r_osd = osd; } @@ -1418,7 +1421,9 @@ static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req) req, req->r_tid); req->r_osd = NULL; + spin_lock(&osd->o_requests_lock); erase_request(&osd->o_requests, req); + spin_unlock(&osd->o_requests_lock); put_osd(osd); if (!osd_homeless(osd)) |