libceph: allocate the locator string with GFP_NOFAIL

calc_target() isn't supposed to fail with anything but POOL_DNE, in
which case we report that the pool doesn't exist and fail the request
with -ENOENT.  Doing this for -ENOMEM is at the very least confusing
and also harmful -- as the preceding requests complete, a short-lived
locator string allocation is likely to succeed after a wait.

(We used to call ceph_object_locator_to_pg() for a pi lookup.  In
theory that could fail with -ENOENT, hence the "ret != -ENOENT" warning
being removed.)

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

1 files changed, 1 insertions, 9 deletions

diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 05c4d27d25fe..f2584fe1246f 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -1430,7 +1430,6 @@ static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
 	bool recovery_deletes = ceph_osdmap_flag(osdc,
 						 CEPH_OSDMAP_RECOVERY_DELETES);
 	enum calc_target_result ct_res;
-	int ret;
 
 	t->epoch = osdc->osdmap->epoch;
 	pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
@@ -1466,14 +1465,7 @@ static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
 		}
 	}
 
-	ret = __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc,
-					  &pgid);
-	if (ret) {
-		WARN_ON(ret != -ENOENT);
-		t->osd = CEPH_HOMELESS_OSD;
-		ct_res = CALC_TARGET_POOL_DNE;
-		goto out;
-	}
+	__ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
 	last_pgid.pool = pgid.pool;
 	last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);