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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>
This commit is contained in:
Yan, Zheng 2015-02-27 08:54:08 +08:00 committed by Ilya Dryomov
parent 39a8804455
commit 6e6f09231a
1 changed files with 13 additions and 6 deletions
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19
fs/ceph/mds_client.c
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@ -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);