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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 /fs/ceph | |
| parent | 33165d472310262d8c79c7e4d1a17dc60cea7e35 (diff) | |
| download | lwn-894868330a1e038ea4a65dbb81741eef70ad71b1.tar.gz lwn-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 'fs/ceph')
| -rw-r--r-- | fs/ceph/mds_client.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 580a79b9a91f..97de674ea377 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -2136,7 +2136,6 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc, if (req->r_pagelist) { struct ceph_pagelist *pagelist = req->r_pagelist; - refcount_inc(&pagelist->refcnt); ceph_msg_data_add_pagelist(msg, pagelist); msg->hdr.data_len = cpu_to_le32(pagelist->length); } else { @@ -3240,6 +3239,7 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc, mutex_unlock(&mdsc->mutex); up_read(&mdsc->snap_rwsem); + ceph_pagelist_release(pagelist); return; fail: |