crush: warn on do_rule failure

If we get an error code from crush_do_rule(), print an error to the
console.

Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Sage Weil <sage@inktank.com>

diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index dac448b..2592f3c 100644 (file)
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -1027,7 +1027,7 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
        struct ceph_pg_mapping *pg;
        struct ceph_pg_pool_info *pool;
        int ruleno;
-       unsigned poolid, ps, pps, t;
+       unsigned poolid, ps, pps, t, r;
 
        poolid = le32_to_cpu(pgid.pool);
        ps = le16_to_cpu(pgid.ps);
@@ -1060,9 +1060,16 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
                              le32_to_cpu(pool->v.pgp_num),
                              pool->pgp_num_mask);
        pps += poolid;
-       *num = crush_do_rule(osdmap->crush, ruleno, pps, osds,
-                            min_t(int, pool->v.size, *num),
-                            osdmap->osd_weight);
+       r = crush_do_rule(osdmap->crush, ruleno, pps, osds,
+                         min_t(int, pool->v.size, *num),
+                         osdmap->osd_weight);
+       if (r < 0) {
+               pr_err("error %d from crush rule: pool %d ruleset %d type %d"
+                      " size %d\n", r, poolid, pool->v.crush_ruleset,
+                      pool->v.type, pool->v.size);
+               return NULL;
+       }
+       *num = r;
        return osds;
 }