#include "ceph_debug.h"
#include <linux/wait.h>
+#include <linux/slab.h>
#include <linux/sched.h>
#include "mds_client.h"
struct ceph_mds_session *s;
s = kzalloc(sizeof(*s), GFP_NOFS);
+ if (!s)
+ return ERR_PTR(-ENOMEM);
s->s_mdsc = mdsc;
s->s_mds = mds;
s->s_state = CEPH_MDS_SESSION_NEW;
{
dout("__unregister_request %p tid %lld\n", req, req->r_tid);
rb_erase(&req->r_node, &mdsc->request_tree);
- ceph_mdsc_put_request(req);
+ RB_CLEAR_NODE(&req->r_node);
if (req->r_unsafe_dir) {
struct ceph_inode_info *ci = ceph_inode(req->r_unsafe_dir);
list_del_init(&req->r_unsafe_dir_item);
spin_unlock(&ci->i_unsafe_lock);
}
+
+ ceph_mdsc_put_request(req);
}
/*
if (time_after_eq(jiffies, session->s_cap_ttl) &&
time_after_eq(session->s_cap_ttl, session->s_renew_requested))
pr_info("mds%d caps stale\n", session->s_mds);
+ session->s_renew_requested = jiffies;
/* do not try to renew caps until a recovering mds has reconnected
* with its clients. */
dout("send_renew_caps to mds%d (%s)\n", session->s_mds,
ceph_mds_state_name(state));
- session->s_renew_requested = jiffies;
msg = create_session_msg(CEPH_SESSION_REQUEST_RENEWCAPS,
++session->s_renew_seq);
if (IS_ERR(msg))
/* get, open session */
session = __ceph_lookup_mds_session(mdsc, mds);
- if (!session)
+ if (!session) {
session = register_session(mdsc, mds);
+ if (IS_ERR(session)) {
+ err = PTR_ERR(session);
+ goto finish;
+ }
+ }
dout("do_request mds%d session %p state %s\n", mds, session,
session_state_name(session->s_state));
if (session->s_state != CEPH_MDS_SESSION_OPEN &&
dout("handle_reply %p\n", req);
/* correct session? */
- if (!req->r_session && req->r_session != session) {
+ if (req->r_session != session) {
pr_err("mdsc_handle_reply got %llu on session mds%d"
" not mds%d\n", tid, session->s_mds,
req->r_session ? req->r_session->s_mds : -1);
struct ceph_msg *msg)
{
struct ceph_mds_request *req;
- u64 tid;
+ u64 tid = le64_to_cpu(msg->hdr.tid);
u32 next_mds;
u32 fwd_seq;
- u8 must_resend;
int err = -EINVAL;
void *p = msg->front.iov_base;
void *end = p + msg->front.iov_len;
- int state;
- ceph_decode_need(&p, end, sizeof(u64)+2*sizeof(u32), bad);
- tid = ceph_decode_64(&p);
+ ceph_decode_need(&p, end, 2*sizeof(u32), bad);
next_mds = ceph_decode_32(&p);
fwd_seq = ceph_decode_32(&p);
- must_resend = ceph_decode_8(&p);
-
- WARN_ON(must_resend); /* shouldn't happen. */
mutex_lock(&mdsc->mutex);
req = __lookup_request(mdsc, tid);
if (!req) {
- dout("forward %llu dne\n", tid);
+ dout("forward %llu to mds%d - req dne\n", tid, next_mds);
goto out; /* dup reply? */
}
- if (next_mds >= mdsc->max_sessions)
- goto out;
-
- state = mdsc->sessions[next_mds]->s_state;
if (fwd_seq <= req->r_num_fwd) {
dout("forward %llu to mds%d - old seq %d <= %d\n",
tid, next_mds, req->r_num_fwd, fwd_seq);
*/
static void wait_unsafe_requests(struct ceph_mds_client *mdsc, u64 want_tid)
{
- struct ceph_mds_request *req = NULL;
+ struct ceph_mds_request *req = NULL, *nextreq;
struct rb_node *n;
mutex_lock(&mdsc->mutex);
dout("wait_unsafe_requests want %lld\n", want_tid);
+restart:
req = __get_oldest_req(mdsc);
while (req && req->r_tid <= want_tid) {
+ /* find next request */
+ n = rb_next(&req->r_node);
+ if (n)
+ nextreq = rb_entry(n, struct ceph_mds_request, r_node);
+ else
+ nextreq = NULL;
if ((req->r_op & CEPH_MDS_OP_WRITE)) {
/* write op */
ceph_mdsc_get_request(req);
+ if (nextreq)
+ ceph_mdsc_get_request(nextreq);
mutex_unlock(&mdsc->mutex);
dout("wait_unsafe_requests wait on %llu (want %llu)\n",
req->r_tid, want_tid);
wait_for_completion(&req->r_safe_completion);
mutex_lock(&mdsc->mutex);
- n = rb_next(&req->r_node);
ceph_mdsc_put_request(req);
- } else {
- n = rb_next(&req->r_node);
+ if (!nextreq)
+ break; /* next dne before, so we're done! */
+ if (RB_EMPTY_NODE(&nextreq->r_node)) {
+ /* next request was removed from tree */
+ ceph_mdsc_put_request(nextreq);
+ goto restart;
+ }
+ ceph_mdsc_put_request(nextreq); /* won't go away */
}
- if (!n)
- break;
- req = rb_entry(n, struct ceph_mds_request, r_node);
+ req = nextreq;
}
mutex_unlock(&mdsc->mutex);
dout("wait_unsafe_requests done\n");