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| author | Yan, Zheng <zyan@redhat.com> | 2015-02-27 08:54:08 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2015-04-20 17:30:22 +0300 |
| commit | 6e6f09231a134e7523514ed504380f5caafc9334 (patch) | |
| tree | a30c557f5f3dd51664c9624e352fbd01ce904f2c /fs/ceph/mds_client.c | |
| parent | 39a8804455fb23f09157341d3ba7db6d7ae6ee76 (diff) | |
| download | lwn-6e6f09231a134e7523514ed504380f5caafc9334.tar.gz lwn-6e6f09231a134e7523514ed504380f5caafc9334.zip | |
ceph: drop cap releases in requests composed before cap reconnect
These cap releases are stale because MDS will re-establish client
caps according to the cap reconnect messages.
Note: MDS can detect stale cap messages, so these stale cap
releases are harmless even we don't drop them.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'fs/ceph/mds_client.c')
| -rw-r--r-- | fs/ceph/mds_client.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 71c073f38e54..0a1a9e452148 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1853,7 +1853,7 @@ static int set_request_path_attr(struct inode *rinode, struct dentry *rdentry, */ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc, struct ceph_mds_request *req, - int mds) + int mds, bool drop_cap_releases) { struct ceph_msg *msg; struct ceph_mds_request_head *head; @@ -1937,6 +1937,12 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc, releases += ceph_encode_inode_release(&p, req->r_old_dentry->d_inode, mds, req->r_old_inode_drop, req->r_old_inode_unless, 0); + + if (drop_cap_releases) { + releases = 0; + p = msg->front.iov_base + req->r_request_release_offset; + } + head->num_releases = cpu_to_le16(releases); /* time stamp */ @@ -1989,7 +1995,7 @@ static void complete_request(struct ceph_mds_client *mdsc, */ static int __prepare_send_request(struct ceph_mds_client *mdsc, struct ceph_mds_request *req, - int mds) + int mds, bool drop_cap_releases) { struct ceph_mds_request_head *rhead; struct ceph_msg *msg; @@ -2048,7 +2054,7 @@ static int __prepare_send_request(struct ceph_mds_client *mdsc, ceph_msg_put(req->r_request); req->r_request = NULL; } - msg = create_request_message(mdsc, req, mds); + msg = create_request_message(mdsc, req, mds, drop_cap_releases); if (IS_ERR(msg)) { req->r_err = PTR_ERR(msg); complete_request(mdsc, req); @@ -2132,7 +2138,7 @@ static int __do_request(struct ceph_mds_client *mdsc, if (req->r_request_started == 0) /* note request start time */ req->r_request_started = jiffies; - err = __prepare_send_request(mdsc, req, mds); + err = __prepare_send_request(mdsc, req, mds, false); if (!err) { ceph_msg_get(req->r_request); ceph_con_send(&session->s_con, req->r_request); @@ -2658,7 +2664,7 @@ static void replay_unsafe_requests(struct ceph_mds_client *mdsc, mutex_lock(&mdsc->mutex); list_for_each_entry_safe(req, nreq, &session->s_unsafe, r_unsafe_item) { - err = __prepare_send_request(mdsc, req, session->s_mds); + err = __prepare_send_request(mdsc, req, session->s_mds, true); if (!err) { ceph_msg_get(req->r_request); ceph_con_send(&session->s_con, req->r_request); @@ -2679,7 +2685,8 @@ static void replay_unsafe_requests(struct ceph_mds_client *mdsc, continue; /* only old requests */ if (req->r_session && req->r_session->s_mds == session->s_mds) { - err = __prepare_send_request(mdsc, req, session->s_mds); + err = __prepare_send_request(mdsc, req, + session->s_mds, true); if (!err) { ceph_msg_get(req->r_request); ceph_con_send(&session->s_con, req->r_request); |