ceph: lookup pool in osdmap by name

Implement a pool lookup by name.  This will be used by rbd.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/fs/ceph/osdmap.c b/fs/ceph/osdmap.c
index e31f118..3ccd117 100644 (file)
--- a/fs/ceph/osdmap.c
+++ b/fs/ceph/osdmap.c
@@ -417,6 +417,19 @@ static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, int id)
        return NULL;
 }
 
+int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name)
+{
+       struct rb_node *rbp;
+
+       for (rbp = rb_first(&map->pg_pools); rbp; rbp = rb_next(rbp)) {
+               struct ceph_pg_pool_info *pi =
+                       rb_entry(rbp, struct ceph_pg_pool_info, node);
+               if (pi->name && strcmp(pi->name, name) == 0)
+                       return pi->id;
+       }
+       return -ENOENT;
+}
+
 static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
 {
        rb_erase(&pi->node, root);

diff --git a/fs/ceph/osdmap.h b/fs/ceph/osdmap.h
index 970b547..a592b21 100644 (file)
--- a/fs/ceph/osdmap.h
+++ b/fs/ceph/osdmap.h
@@ -125,4 +125,6 @@ extern int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
 extern int ceph_calc_pg_primary(struct ceph_osdmap *osdmap,
                                struct ceph_pg pgid);
 
+extern int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name);
+
 #endif