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>

2 files changed, 15 insertions, 0 deletions

diff --git a/fs/ceph/osdmap.c b/fs/ceph/osdmap.c
index e31f118f1392..3ccd11761cb6 100644
--- 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 970b547e510d..a592b211be39 100644
--- 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