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| author |   Ilya Dryomov <idryomov@gmail.com> | 2018-09-28 16:02:53 +0200 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2018-10-22 10:28:21 +0200 |
| commit | 894868330a1e038ea4a65dbb81741eef70ad71b1 (patch) | |
| tree | 50c12aec68b82146b05c6e18cc76117af0047ded /net/ceph/messenger.c | |
| parent | libceph: introduce ceph_pagelist_alloc() (diff) | |
| download | linux-dev-894868330a1e038ea4a65dbb81741eef70ad71b1.tar.xz linux-dev-894868330a1e038ea4a65dbb81741eef70ad71b1.zip | |
libceph: don't consume a ref on pagelist in ceph_msg_data_add_pagelist()
Because send_mds_reconnect() wants to send a message with a pagelist
and pass the ownership to the messenger, ceph_msg_data_add_pagelist()
consumes a ref which is then put in ceph_msg_data_destroy(). This
makes managing pagelists in the OSD client (where they are wrapped in
ceph_osd_data) unnecessarily hard because the handoff only happens in
ceph_osdc_start_request() instead of when the pagelist is passed to
ceph_osd_data_pagelist_init(). I counted several memory leaks on
various error paths.
Fix up ceph_msg_data_add_pagelist() and carry a pagelist ref in
ceph_osd_data.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'net/ceph/messenger.c')
| -rw-r--r-- | net/ceph/messenger.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 0a187196aeed..76684edc43ef 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -3313,6 +3313,7 @@ void ceph_msg_data_add_pagelist(struct ceph_msg *msg, data = ceph_msg_data_create(CEPH_MSG_DATA_PAGELIST); BUG_ON(!data); + refcount_inc(&pagelist->refcnt); data->pagelist = pagelist; list_add_tail(&data->links, &msg->data); |