ceph: resubmit requests on pg mapping change (not just primary change)
OSD requests need to be resubmitted on any pg mapping change, not just when
the pg primary changes. Resending only when the primary changes results in
occasional 'hung' requests during osd cluster recovery or rebalancing.
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/osd_client.c b/fs/ceph/osd_client.c
index 8128082a..3514f71 100644
--- a/fs/ceph/osd_client.c
+++ b/fs/ceph/osd_client.c
@@ -565,7 +565,8 @@
{
struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
struct ceph_pg pgid;
- int o = -1;
+ int acting[CEPH_PG_MAX_SIZE];
+ int o = -1, num = 0;
int err;
dout("map_osds %p tid %lld\n", req, req->r_tid);
@@ -576,10 +577,16 @@
pgid = reqhead->layout.ol_pgid;
req->r_pgid = pgid;
- o = ceph_calc_pg_primary(osdc->osdmap, pgid);
+ err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
+ if (err > 0) {
+ o = acting[0];
+ num = err;
+ }
if ((req->r_osd && req->r_osd->o_osd == o &&
- req->r_sent >= req->r_osd->o_incarnation) ||
+ req->r_sent >= req->r_osd->o_incarnation &&
+ req->r_num_pg_osds == num &&
+ memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
(req->r_osd == NULL && o == -1))
return 0; /* no change */
@@ -587,6 +594,10 @@
req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o,
req->r_osd ? req->r_osd->o_osd : -1);
+ /* record full pg acting set */
+ memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
+ req->r_num_pg_osds = num;
+
if (req->r_osd) {
__cancel_request(req);
list_del_init(&req->r_osd_item);
@@ -612,7 +623,7 @@
__remove_osd_from_lru(req->r_osd);
list_add(&req->r_osd_item, &req->r_osd->o_requests);
}
- err = 1; /* osd changed */
+ err = 1; /* osd or pg changed */
out:
return err;