Since we no longer drop the request mutex between registering and
mapping an osd request in ceph_osdc_start_request(), there is no
chance of a race with kick_requests().
We can now therefore map and send the new request unconditionally
(but we'll issue a warning should it ever occur).
Signed-off-by: Alex Elder <elder@xxxxxxxxxxx>
---
net/ceph/osd_client.c | 37 +++++++++++++++----------------------
1 file changed, 15 insertions(+), 22 deletions(-)
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index f9276cb..3723a7f 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -1779,31 +1779,24 @@ int ceph_osdc_start_request(struct
ceph_osd_client *osdc,
down_read(&osdc->map_sem);
mutex_lock(&osdc->request_mutex);
- /*
- * a racing kick_requests() may have sent the message for us
- * while we dropped request_mutex above, so only send now if
- * the request still han't been touched yet.
- */
__register_request(osdc, req);
- if (req->r_sent == 0) {
- rc = __map_request(osdc, req, 0);
- if (rc < 0) {
- if (nofail) {
- dout("osdc_start_request failed map, "
- " will retry %lld\n", req->r_tid);
- rc = 0;
- }
- goto out_unlock;
- }
- if (req->r_osd == NULL) {
- dout("send_request %p no up osds in pg\n", req);
- ceph_monc_request_next_osdmap(&osdc->client->monc);
- } else {
- __send_request(osdc, req);
+ WARN_ON(req->r_sent);
+ rc = __map_request(osdc, req, 0);
+ if (rc < 0) {
+ if (nofail) {
+ dout("osdc_start_request failed map, "
+ " will retry %lld\n", req->r_tid);
+ rc = 0;
}
- rc = 0;
+ goto out_unlock;
}
-
+ if (req->r_osd == NULL) {
+ dout("send_request %p no up osds in pg\n", req);
+ ceph_monc_request_next_osdmap(&osdc->client->monc);
+ } else {
+ __send_request(osdc, req);
+ }
+ rc = 0;
out_unlock:
mutex_unlock(&osdc->request_mutex);
up_read(&osdc->map_sem);
--
1.7.9.5
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