1 #include <linux/ceph/ceph_debug.h>
3 #include <linux/module.h>
4 #include <linux/types.h>
5 #include <linux/slab.h>
6 #include <linux/random.h>
7 #include <linux/sched.h>
9 #include <linux/ceph/mon_client.h>
10 #include <linux/ceph/libceph.h>
11 #include <linux/ceph/debugfs.h>
12 #include <linux/ceph/decode.h>
13 #include <linux/ceph/auth.h>
16 * Interact with Ceph monitor cluster. Handle requests for new map
17 * versions, and periodically resend as needed. Also implement
18 * statfs() and umount().
20 * A small cluster of Ceph "monitors" are responsible for managing critical
21 * cluster configuration and state information. An odd number (e.g., 3, 5)
22 * of cmon daemons use a modified version of the Paxos part-time parliament
23 * algorithm to manage the MDS map (mds cluster membership), OSD map, and
24 * list of clients who have mounted the file system.
26 * We maintain an open, active session with a monitor at all times in order to
27 * receive timely MDSMap updates. We periodically send a keepalive byte on the
28 * TCP socket to ensure we detect a failure. If the connection does break, we
29 * randomly hunt for a new monitor. Once the connection is reestablished, we
30 * resend any outstanding requests.
33 static const struct ceph_connection_operations mon_con_ops;
35 static int __validate_auth(struct ceph_mon_client *monc);
38 * Decode a monmap blob (e.g., during mount).
40 struct ceph_monmap *ceph_monmap_decode(void *p, void *end)
42 struct ceph_monmap *m = NULL;
44 struct ceph_fsid fsid;
49 ceph_decode_32_safe(&p, end, len, bad);
50 ceph_decode_need(&p, end, len, bad);
52 dout("monmap_decode %p %p len %d\n", p, end, (int)(end-p));
54 ceph_decode_16_safe(&p, end, version, bad);
56 ceph_decode_need(&p, end, sizeof(fsid) + 2*sizeof(u32), bad);
57 ceph_decode_copy(&p, &fsid, sizeof(fsid));
58 epoch = ceph_decode_32(&p);
60 num_mon = ceph_decode_32(&p);
61 ceph_decode_need(&p, end, num_mon*sizeof(m->mon_inst[0]), bad);
63 if (num_mon >= CEPH_MAX_MON)
65 m = kmalloc(sizeof(*m) + sizeof(m->mon_inst[0])*num_mon, GFP_NOFS);
67 return ERR_PTR(-ENOMEM);
71 ceph_decode_copy(&p, m->mon_inst, num_mon*sizeof(m->mon_inst[0]));
72 for (i = 0; i < num_mon; i++)
73 ceph_decode_addr(&m->mon_inst[i].addr);
75 dout("monmap_decode epoch %d, num_mon %d\n", m->epoch,
77 for (i = 0; i < m->num_mon; i++)
78 dout("monmap_decode mon%d is %s\n", i,
79 ceph_pr_addr(&m->mon_inst[i].addr.in_addr));
83 dout("monmap_decode failed with %d\n", err);
89 * return true if *addr is included in the monmap.
91 int ceph_monmap_contains(struct ceph_monmap *m, struct ceph_entity_addr *addr)
95 for (i = 0; i < m->num_mon; i++)
96 if (memcmp(addr, &m->mon_inst[i].addr, sizeof(*addr)) == 0)
102 * Send an auth request.
104 static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len)
106 monc->pending_auth = 1;
107 monc->m_auth->front.iov_len = len;
108 monc->m_auth->hdr.front_len = cpu_to_le32(len);
109 ceph_msg_revoke(monc->m_auth);
110 ceph_msg_get(monc->m_auth); /* keep our ref */
111 ceph_con_send(&monc->con, monc->m_auth);
115 * Close monitor session, if any.
117 static void __close_session(struct ceph_mon_client *monc)
119 dout("__close_session closing mon%d\n", monc->cur_mon);
120 ceph_msg_revoke(monc->m_auth);
121 ceph_msg_revoke_incoming(monc->m_auth_reply);
122 ceph_msg_revoke(monc->m_subscribe);
123 ceph_msg_revoke_incoming(monc->m_subscribe_ack);
124 ceph_con_close(&monc->con);
126 monc->pending_auth = 0;
127 ceph_auth_reset(monc->auth);
131 * Open a session with a (new) monitor.
133 static int __open_session(struct ceph_mon_client *monc)
138 if (monc->cur_mon < 0) {
139 get_random_bytes(&r, 1);
140 monc->cur_mon = r % monc->monmap->num_mon;
141 dout("open_session num=%d r=%d -> mon%d\n",
142 monc->monmap->num_mon, r, monc->cur_mon);
144 monc->sub_renew_after = jiffies; /* i.e., expired */
145 monc->want_next_osdmap = !!monc->want_next_osdmap;
147 dout("open_session mon%d opening\n", monc->cur_mon);
148 ceph_con_open(&monc->con,
149 CEPH_ENTITY_TYPE_MON, monc->cur_mon,
150 &monc->monmap->mon_inst[monc->cur_mon].addr);
152 /* initiatiate authentication handshake */
153 ret = ceph_auth_build_hello(monc->auth,
154 monc->m_auth->front.iov_base,
155 monc->m_auth->front_max);
156 __send_prepared_auth_request(monc, ret);
158 dout("open_session mon%d already open\n", monc->cur_mon);
163 static bool __sub_expired(struct ceph_mon_client *monc)
165 return time_after_eq(jiffies, monc->sub_renew_after);
169 * Reschedule delayed work timer.
171 static void __schedule_delayed(struct ceph_mon_client *monc)
175 if (monc->cur_mon < 0 || __sub_expired(monc))
179 dout("__schedule_delayed after %u\n", delay);
180 schedule_delayed_work(&monc->delayed_work, delay);
184 * Send subscribe request for mdsmap and/or osdmap.
186 static void __send_subscribe(struct ceph_mon_client *monc)
188 dout("__send_subscribe sub_sent=%u exp=%u want_osd=%d\n",
189 (unsigned int)monc->sub_sent, __sub_expired(monc),
190 monc->want_next_osdmap);
191 if ((__sub_expired(monc) && !monc->sub_sent) ||
192 monc->want_next_osdmap == 1) {
193 struct ceph_msg *msg = monc->m_subscribe;
194 struct ceph_mon_subscribe_item *i;
198 p = msg->front.iov_base;
199 end = p + msg->front_max;
201 num = 1 + !!monc->want_next_osdmap + !!monc->want_mdsmap;
202 ceph_encode_32(&p, num);
204 if (monc->want_next_osdmap) {
205 dout("__send_subscribe to 'osdmap' %u\n",
206 (unsigned int)monc->have_osdmap);
207 ceph_encode_string(&p, end, "osdmap", 6);
209 i->have = cpu_to_le64(monc->have_osdmap);
212 monc->want_next_osdmap = 2; /* requested */
214 if (monc->want_mdsmap) {
215 dout("__send_subscribe to 'mdsmap' %u+\n",
216 (unsigned int)monc->have_mdsmap);
217 ceph_encode_string(&p, end, "mdsmap", 6);
219 i->have = cpu_to_le64(monc->have_mdsmap);
223 ceph_encode_string(&p, end, "monmap", 6);
229 msg->front.iov_len = p - msg->front.iov_base;
230 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
231 ceph_msg_revoke(msg);
232 ceph_con_send(&monc->con, ceph_msg_get(msg));
234 monc->sub_sent = jiffies | 1; /* never 0 */
238 static void handle_subscribe_ack(struct ceph_mon_client *monc,
239 struct ceph_msg *msg)
241 unsigned int seconds;
242 struct ceph_mon_subscribe_ack *h = msg->front.iov_base;
244 if (msg->front.iov_len < sizeof(*h))
246 seconds = le32_to_cpu(h->duration);
248 mutex_lock(&monc->mutex);
250 pr_info("mon%d %s session established\n",
252 ceph_pr_addr(&monc->con.peer_addr.in_addr));
253 monc->hunting = false;
255 dout("handle_subscribe_ack after %d seconds\n", seconds);
256 monc->sub_renew_after = monc->sub_sent + (seconds >> 1)*HZ - 1;
258 mutex_unlock(&monc->mutex);
261 pr_err("got corrupt subscribe-ack msg\n");
266 * Keep track of which maps we have
268 int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 got)
270 mutex_lock(&monc->mutex);
271 monc->have_mdsmap = got;
272 mutex_unlock(&monc->mutex);
275 EXPORT_SYMBOL(ceph_monc_got_mdsmap);
277 int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 got)
279 mutex_lock(&monc->mutex);
280 monc->have_osdmap = got;
281 monc->want_next_osdmap = 0;
282 mutex_unlock(&monc->mutex);
287 * Register interest in the next osdmap
289 void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc)
291 dout("request_next_osdmap have %u\n", monc->have_osdmap);
292 mutex_lock(&monc->mutex);
293 if (!monc->want_next_osdmap)
294 monc->want_next_osdmap = 1;
295 if (monc->want_next_osdmap < 2)
296 __send_subscribe(monc);
297 mutex_unlock(&monc->mutex);
303 int ceph_monc_open_session(struct ceph_mon_client *monc)
305 mutex_lock(&monc->mutex);
306 __open_session(monc);
307 __schedule_delayed(monc);
308 mutex_unlock(&monc->mutex);
311 EXPORT_SYMBOL(ceph_monc_open_session);
314 * The monitor responds with mount ack indicate mount success. The
315 * included client ticket allows the client to talk to MDSs and OSDs.
317 static void ceph_monc_handle_map(struct ceph_mon_client *monc,
318 struct ceph_msg *msg)
320 struct ceph_client *client = monc->client;
321 struct ceph_monmap *monmap = NULL, *old = monc->monmap;
324 mutex_lock(&monc->mutex);
326 dout("handle_monmap\n");
327 p = msg->front.iov_base;
328 end = p + msg->front.iov_len;
330 monmap = ceph_monmap_decode(p, end);
331 if (IS_ERR(monmap)) {
332 pr_err("problem decoding monmap, %d\n",
333 (int)PTR_ERR(monmap));
337 if (ceph_check_fsid(monc->client, &monmap->fsid) < 0) {
342 client->monc.monmap = monmap;
345 if (!client->have_fsid) {
346 client->have_fsid = true;
347 mutex_unlock(&monc->mutex);
349 * do debugfs initialization without mutex to avoid
350 * creating a locking dependency
352 ceph_debugfs_client_init(client);
356 mutex_unlock(&monc->mutex);
358 wake_up_all(&client->auth_wq);
362 * generic requests (e.g., statfs, poolop)
364 static struct ceph_mon_generic_request *__lookup_generic_req(
365 struct ceph_mon_client *monc, u64 tid)
367 struct ceph_mon_generic_request *req;
368 struct rb_node *n = monc->generic_request_tree.rb_node;
371 req = rb_entry(n, struct ceph_mon_generic_request, node);
374 else if (tid > req->tid)
382 static void __insert_generic_request(struct ceph_mon_client *monc,
383 struct ceph_mon_generic_request *new)
385 struct rb_node **p = &monc->generic_request_tree.rb_node;
386 struct rb_node *parent = NULL;
387 struct ceph_mon_generic_request *req = NULL;
391 req = rb_entry(parent, struct ceph_mon_generic_request, node);
392 if (new->tid < req->tid)
394 else if (new->tid > req->tid)
400 rb_link_node(&new->node, parent, p);
401 rb_insert_color(&new->node, &monc->generic_request_tree);
404 static void release_generic_request(struct kref *kref)
406 struct ceph_mon_generic_request *req =
407 container_of(kref, struct ceph_mon_generic_request, kref);
410 ceph_msg_put(req->reply);
412 ceph_msg_put(req->request);
417 static void put_generic_request(struct ceph_mon_generic_request *req)
419 kref_put(&req->kref, release_generic_request);
422 static void get_generic_request(struct ceph_mon_generic_request *req)
424 kref_get(&req->kref);
427 static struct ceph_msg *get_generic_reply(struct ceph_connection *con,
428 struct ceph_msg_header *hdr,
431 struct ceph_mon_client *monc = con->private;
432 struct ceph_mon_generic_request *req;
433 u64 tid = le64_to_cpu(hdr->tid);
436 mutex_lock(&monc->mutex);
437 req = __lookup_generic_req(monc, tid);
439 dout("get_generic_reply %lld dne\n", tid);
443 dout("get_generic_reply %lld got %p\n", tid, req->reply);
445 m = ceph_msg_get(req->reply);
447 * we don't need to track the connection reading into
448 * this reply because we only have one open connection
452 mutex_unlock(&monc->mutex);
456 static int do_generic_request(struct ceph_mon_client *monc,
457 struct ceph_mon_generic_request *req)
461 /* register request */
462 mutex_lock(&monc->mutex);
463 req->tid = ++monc->last_tid;
464 req->request->hdr.tid = cpu_to_le64(req->tid);
465 __insert_generic_request(monc, req);
466 monc->num_generic_requests++;
467 ceph_con_send(&monc->con, ceph_msg_get(req->request));
468 mutex_unlock(&monc->mutex);
470 err = wait_for_completion_interruptible(&req->completion);
472 mutex_lock(&monc->mutex);
473 rb_erase(&req->node, &monc->generic_request_tree);
474 monc->num_generic_requests--;
475 mutex_unlock(&monc->mutex);
485 static void handle_statfs_reply(struct ceph_mon_client *monc,
486 struct ceph_msg *msg)
488 struct ceph_mon_generic_request *req;
489 struct ceph_mon_statfs_reply *reply = msg->front.iov_base;
490 u64 tid = le64_to_cpu(msg->hdr.tid);
492 if (msg->front.iov_len != sizeof(*reply))
494 dout("handle_statfs_reply %p tid %llu\n", msg, tid);
496 mutex_lock(&monc->mutex);
497 req = __lookup_generic_req(monc, tid);
499 *(struct ceph_statfs *)req->buf = reply->st;
501 get_generic_request(req);
503 mutex_unlock(&monc->mutex);
505 complete_all(&req->completion);
506 put_generic_request(req);
511 pr_err("corrupt generic reply, tid %llu\n", tid);
516 * Do a synchronous statfs().
518 int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf)
520 struct ceph_mon_generic_request *req;
521 struct ceph_mon_statfs *h;
524 req = kzalloc(sizeof(*req), GFP_NOFS);
528 kref_init(&req->kref);
530 req->buf_len = sizeof(*buf);
531 init_completion(&req->completion);
534 req->request = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), GFP_NOFS,
538 req->reply = ceph_msg_new(CEPH_MSG_STATFS_REPLY, 1024, GFP_NOFS,
543 /* fill out request */
544 h = req->request->front.iov_base;
545 h->monhdr.have_version = 0;
546 h->monhdr.session_mon = cpu_to_le16(-1);
547 h->monhdr.session_mon_tid = 0;
548 h->fsid = monc->monmap->fsid;
550 err = do_generic_request(monc, req);
553 kref_put(&req->kref, release_generic_request);
556 EXPORT_SYMBOL(ceph_monc_do_statfs);
561 static int get_poolop_reply_buf(const char *src, size_t src_len,
562 char *dst, size_t dst_len)
566 if (src_len != sizeof(u32) + dst_len)
569 buf_len = le32_to_cpu(*(u32 *)src);
570 if (buf_len != dst_len)
573 memcpy(dst, src + sizeof(u32), dst_len);
577 static void handle_poolop_reply(struct ceph_mon_client *monc,
578 struct ceph_msg *msg)
580 struct ceph_mon_generic_request *req;
581 struct ceph_mon_poolop_reply *reply = msg->front.iov_base;
582 u64 tid = le64_to_cpu(msg->hdr.tid);
584 if (msg->front.iov_len < sizeof(*reply))
586 dout("handle_poolop_reply %p tid %llu\n", msg, tid);
588 mutex_lock(&monc->mutex);
589 req = __lookup_generic_req(monc, tid);
592 get_poolop_reply_buf(msg->front.iov_base + sizeof(*reply),
593 msg->front.iov_len - sizeof(*reply),
594 req->buf, req->buf_len) < 0) {
595 mutex_unlock(&monc->mutex);
598 req->result = le32_to_cpu(reply->reply_code);
599 get_generic_request(req);
601 mutex_unlock(&monc->mutex);
603 complete(&req->completion);
604 put_generic_request(req);
609 pr_err("corrupt generic reply, tid %llu\n", tid);
614 * Do a synchronous pool op.
616 int ceph_monc_do_poolop(struct ceph_mon_client *monc, u32 op,
617 u32 pool, u64 snapid,
620 struct ceph_mon_generic_request *req;
621 struct ceph_mon_poolop *h;
624 req = kzalloc(sizeof(*req), GFP_NOFS);
628 kref_init(&req->kref);
631 init_completion(&req->completion);
634 req->request = ceph_msg_new(CEPH_MSG_POOLOP, sizeof(*h), GFP_NOFS,
638 req->reply = ceph_msg_new(CEPH_MSG_POOLOP_REPLY, 1024, GFP_NOFS,
643 /* fill out request */
644 req->request->hdr.version = cpu_to_le16(2);
645 h = req->request->front.iov_base;
646 h->monhdr.have_version = 0;
647 h->monhdr.session_mon = cpu_to_le16(-1);
648 h->monhdr.session_mon_tid = 0;
649 h->fsid = monc->monmap->fsid;
650 h->pool = cpu_to_le32(pool);
651 h->op = cpu_to_le32(op);
653 h->snapid = cpu_to_le64(snapid);
656 err = do_generic_request(monc, req);
659 kref_put(&req->kref, release_generic_request);
663 int ceph_monc_create_snapid(struct ceph_mon_client *monc,
664 u32 pool, u64 *snapid)
666 return ceph_monc_do_poolop(monc, POOL_OP_CREATE_UNMANAGED_SNAP,
667 pool, 0, (char *)snapid, sizeof(*snapid));
670 EXPORT_SYMBOL(ceph_monc_create_snapid);
672 int ceph_monc_delete_snapid(struct ceph_mon_client *monc,
673 u32 pool, u64 snapid)
675 return ceph_monc_do_poolop(monc, POOL_OP_CREATE_UNMANAGED_SNAP,
681 * Resend pending generic requests.
683 static void __resend_generic_request(struct ceph_mon_client *monc)
685 struct ceph_mon_generic_request *req;
688 for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) {
689 req = rb_entry(p, struct ceph_mon_generic_request, node);
690 ceph_msg_revoke(req->request);
691 ceph_msg_revoke_incoming(req->reply);
692 ceph_con_send(&monc->con, ceph_msg_get(req->request));
697 * Delayed work. If we haven't mounted yet, retry. Otherwise,
698 * renew/retry subscription as needed (in case it is timing out, or we
699 * got an ENOMEM). And keep the monitor connection alive.
701 static void delayed_work(struct work_struct *work)
703 struct ceph_mon_client *monc =
704 container_of(work, struct ceph_mon_client, delayed_work.work);
706 dout("monc delayed_work\n");
707 mutex_lock(&monc->mutex);
709 __close_session(monc);
710 __open_session(monc); /* continue hunting */
712 ceph_con_keepalive(&monc->con);
714 __validate_auth(monc);
716 if (monc->auth->ops->is_authenticated(monc->auth))
717 __send_subscribe(monc);
719 __schedule_delayed(monc);
720 mutex_unlock(&monc->mutex);
724 * On startup, we build a temporary monmap populated with the IPs
725 * provided by mount(2).
727 static int build_initial_monmap(struct ceph_mon_client *monc)
729 struct ceph_options *opt = monc->client->options;
730 struct ceph_entity_addr *mon_addr = opt->mon_addr;
731 int num_mon = opt->num_mon;
734 /* build initial monmap */
735 monc->monmap = kzalloc(sizeof(*monc->monmap) +
736 num_mon*sizeof(monc->monmap->mon_inst[0]),
740 for (i = 0; i < num_mon; i++) {
741 monc->monmap->mon_inst[i].addr = mon_addr[i];
742 monc->monmap->mon_inst[i].addr.nonce = 0;
743 monc->monmap->mon_inst[i].name.type =
744 CEPH_ENTITY_TYPE_MON;
745 monc->monmap->mon_inst[i].name.num = cpu_to_le64(i);
747 monc->monmap->num_mon = num_mon;
748 monc->have_fsid = false;
752 int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl)
757 memset(monc, 0, sizeof(*monc));
760 mutex_init(&monc->mutex);
762 err = build_initial_monmap(monc);
768 monc->auth = ceph_auth_init(cl->options->name,
770 if (IS_ERR(monc->auth)) {
771 err = PTR_ERR(monc->auth);
774 monc->auth->want_keys =
775 CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON |
776 CEPH_ENTITY_TYPE_OSD | CEPH_ENTITY_TYPE_MDS;
780 monc->m_subscribe_ack = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE_ACK,
781 sizeof(struct ceph_mon_subscribe_ack),
783 if (!monc->m_subscribe_ack)
786 monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 96, GFP_NOFS,
788 if (!monc->m_subscribe)
789 goto out_subscribe_ack;
791 monc->m_auth_reply = ceph_msg_new(CEPH_MSG_AUTH_REPLY, 4096, GFP_NOFS,
793 if (!monc->m_auth_reply)
796 monc->m_auth = ceph_msg_new(CEPH_MSG_AUTH, 4096, GFP_NOFS, true);
797 monc->pending_auth = 0;
801 ceph_con_init(&monc->con, monc, &mon_con_ops,
802 &monc->client->msgr);
805 monc->hunting = true;
806 monc->sub_renew_after = jiffies;
809 INIT_DELAYED_WORK(&monc->delayed_work, delayed_work);
810 monc->generic_request_tree = RB_ROOT;
811 monc->num_generic_requests = 0;
814 monc->have_mdsmap = 0;
815 monc->have_osdmap = 0;
816 monc->want_next_osdmap = 1;
820 ceph_msg_put(monc->m_auth_reply);
822 ceph_msg_put(monc->m_subscribe);
824 ceph_msg_put(monc->m_subscribe_ack);
826 ceph_auth_destroy(monc->auth);
832 EXPORT_SYMBOL(ceph_monc_init);
834 void ceph_monc_stop(struct ceph_mon_client *monc)
837 cancel_delayed_work_sync(&monc->delayed_work);
839 mutex_lock(&monc->mutex);
840 __close_session(monc);
842 mutex_unlock(&monc->mutex);
845 * flush msgr queue before we destroy ourselves to ensure that:
846 * - any work that references our embedded con is finished.
847 * - any osd_client or other work that may reference an authorizer
848 * finishes before we shut down the auth subsystem.
852 ceph_auth_destroy(monc->auth);
854 ceph_msg_put(monc->m_auth);
855 ceph_msg_put(monc->m_auth_reply);
856 ceph_msg_put(monc->m_subscribe);
857 ceph_msg_put(monc->m_subscribe_ack);
861 EXPORT_SYMBOL(ceph_monc_stop);
863 static void handle_auth_reply(struct ceph_mon_client *monc,
864 struct ceph_msg *msg)
869 mutex_lock(&monc->mutex);
871 was_auth = monc->auth->ops->is_authenticated(monc->auth);
872 monc->pending_auth = 0;
873 ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base,
875 monc->m_auth->front.iov_base,
876 monc->m_auth->front_max);
878 monc->client->auth_err = ret;
879 wake_up_all(&monc->client->auth_wq);
880 } else if (ret > 0) {
881 __send_prepared_auth_request(monc, ret);
882 } else if (!was_auth && monc->auth->ops->is_authenticated(monc->auth)) {
883 dout("authenticated, starting session\n");
885 monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT;
886 monc->client->msgr.inst.name.num =
887 cpu_to_le64(monc->auth->global_id);
889 __send_subscribe(monc);
890 __resend_generic_request(monc);
892 mutex_unlock(&monc->mutex);
895 static int __validate_auth(struct ceph_mon_client *monc)
899 if (monc->pending_auth)
902 ret = ceph_build_auth(monc->auth, monc->m_auth->front.iov_base,
903 monc->m_auth->front_max);
905 return ret; /* either an error, or no need to authenticate */
906 __send_prepared_auth_request(monc, ret);
910 int ceph_monc_validate_auth(struct ceph_mon_client *monc)
914 mutex_lock(&monc->mutex);
915 ret = __validate_auth(monc);
916 mutex_unlock(&monc->mutex);
919 EXPORT_SYMBOL(ceph_monc_validate_auth);
922 * handle incoming message
924 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
926 struct ceph_mon_client *monc = con->private;
927 int type = le16_to_cpu(msg->hdr.type);
933 case CEPH_MSG_AUTH_REPLY:
934 handle_auth_reply(monc, msg);
937 case CEPH_MSG_MON_SUBSCRIBE_ACK:
938 handle_subscribe_ack(monc, msg);
941 case CEPH_MSG_STATFS_REPLY:
942 handle_statfs_reply(monc, msg);
945 case CEPH_MSG_POOLOP_REPLY:
946 handle_poolop_reply(monc, msg);
949 case CEPH_MSG_MON_MAP:
950 ceph_monc_handle_map(monc, msg);
953 case CEPH_MSG_OSD_MAP:
954 ceph_osdc_handle_map(&monc->client->osdc, msg);
958 /* can the chained handler handle it? */
959 if (monc->client->extra_mon_dispatch &&
960 monc->client->extra_mon_dispatch(monc->client, msg) == 0)
963 pr_err("received unknown message type %d %s\n", type,
964 ceph_msg_type_name(type));
970 * Allocate memory for incoming message
972 static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
973 struct ceph_msg_header *hdr,
976 struct ceph_mon_client *monc = con->private;
977 int type = le16_to_cpu(hdr->type);
978 int front_len = le32_to_cpu(hdr->front_len);
979 struct ceph_msg *m = NULL;
984 case CEPH_MSG_MON_SUBSCRIBE_ACK:
985 m = ceph_msg_get(monc->m_subscribe_ack);
987 case CEPH_MSG_POOLOP_REPLY:
988 case CEPH_MSG_STATFS_REPLY:
989 return get_generic_reply(con, hdr, skip);
990 case CEPH_MSG_AUTH_REPLY:
991 m = ceph_msg_get(monc->m_auth_reply);
993 case CEPH_MSG_MON_MAP:
994 case CEPH_MSG_MDS_MAP:
995 case CEPH_MSG_OSD_MAP:
996 m = ceph_msg_new(type, front_len, GFP_NOFS, false);
998 return NULL; /* ENOMEM--return skip == 0 */
1003 pr_info("alloc_msg unknown type %d\n", type);
1010 * If the monitor connection resets, pick a new monitor and resubmit
1011 * any pending requests.
1013 static void mon_fault(struct ceph_connection *con)
1015 struct ceph_mon_client *monc = con->private;
1020 dout("mon_fault\n");
1021 mutex_lock(&monc->mutex);
1026 pr_info("mon%d %s session lost, "
1027 "hunting for new mon\n", monc->cur_mon,
1028 ceph_pr_addr(&monc->con.peer_addr.in_addr));
1030 __close_session(monc);
1031 if (!monc->hunting) {
1033 monc->hunting = true;
1034 __open_session(monc);
1036 /* already hunting, let's wait a bit */
1037 __schedule_delayed(monc);
1040 mutex_unlock(&monc->mutex);
1044 * We can ignore refcounting on the connection struct, as all references
1045 * will come from the messenger workqueue, which is drained prior to
1046 * mon_client destruction.
1048 static struct ceph_connection *con_get(struct ceph_connection *con)
1053 static void con_put(struct ceph_connection *con)
1057 static const struct ceph_connection_operations mon_con_ops = {
1060 .dispatch = dispatch,
1062 .alloc_msg = mon_alloc_msg,