libceph: add ceph_pg_pool_by_id()

"Lookup pool info by ID" function is hidden in osdmap.c.  Expose it to
the rest of libceph.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/ceph/osdmap.h b/include/linux/ceph/osdmap.h
index ebb8ec285de6..7f894a64c6c7 100644
--- a/include/linux/ceph/osdmap.h
+++ b/include/linux/ceph/osdmap.h
@@ -174,6 +174,9 @@ extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap,
 extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
                                 struct ceph_pg pgid);
 
+extern struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map,
+                                                    u64 id);
+
 extern const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id);
 extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name);
 
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index 768dd04eb9b1..d69d23556f0c 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -464,6 +464,11 @@ static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, u64 id)
         return NULL;
 }
 
+struct ceph_pg_pool_info *ceph_pg_pool_by_id(struct ceph_osdmap *map, u64 id)
+{
+        return __lookup_pg_pool(&map->pg_pools, id);
+}
+
 const char *ceph_pg_pool_name_by_id(struct ceph_osdmap *map, u64 id)
 {
         struct ceph_pg_pool_info *pi;