From 0d5af1643535508f82d6bcc2b9b93b180e8c3f4b Mon Sep 17 00:00:00 2001
From: Alex Elder <elder@inktank.com>
Date: Wed, 27 Feb 2013 10:26:25 -0600
Subject: [PATCH] libceph: complete lingering requests only once
An osd request marked to linger will be re-submitted in the event
a connection to the target osd gets dropped. Currently, if there
is a callback function associated with a request it will be called
each time a request is submitted--which for lingering requests can
be more than once.
Change it so a request--including lingering ones--will get completed
(from the perspective of the user of the osd client) exactly once.
This resolves:
http://tracker.ceph.com/issues/3967
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
---
include/linux/ceph/osd_client.h | 1 +
net/ceph/osd_client.c | 5 +++++
2 files changed, 6 insertions(+)
diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h
index 1dd5d466b6f9..a79f833bba4a 100644
--- a/include/linux/ceph/osd_client.h
+++ b/include/linux/ceph/osd_client.h
@@ -85,6 +85,7 @@ struct ceph_osd_request {
s32 r_reply_op_result[CEPH_OSD_MAX_OP];
int r_got_reply;
int r_linger;
+ int r_completed;
struct ceph_osd_client *r_osdc;
struct kref r_kref;
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 1d9ebf967b00..a28c976ae3ae 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -1174,6 +1174,7 @@ static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
u32 reassert_epoch;
u64 reassert_version;
u32 osdmap_epoch;
+ int already_completed;
int i;
tid = le64_to_cpu(msg->hdr.tid);
@@ -1282,7 +1283,11 @@ static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
((flags & CEPH_OSD_FLAG_WRITE) == 0))
__unregister_request(osdc, req);
+ already_completed = req->r_completed;
+ req->r_completed = 1;
mutex_unlock(&osdc->request_mutex);
+ if (already_completed)
+ goto done;
if (req->r_callback)
req->r_callback(req, msg);
--
2.20.1