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_con_revoke(monc->con, 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_con_revoke(monc->con, monc->m_auth);
121 ceph_con_close(monc->con);
123 monc->pending_auth = 0;
124 ceph_auth_reset(monc->auth);
128 * Open a session with a (new) monitor.
130 static int __open_session(struct ceph_mon_client *monc)
135 if (monc->cur_mon < 0) {
136 get_random_bytes(&r, 1);
137 monc->cur_mon = r % monc->monmap->num_mon;
138 dout("open_session num=%d r=%d -> mon%d\n",
139 monc->monmap->num_mon, r, monc->cur_mon);
141 monc->sub_renew_after = jiffies; /* i.e., expired */
142 monc->want_next_osdmap = !!monc->want_next_osdmap;
144 dout("open_session mon%d opening\n", monc->cur_mon);
145 monc->con->peer_name.type = CEPH_ENTITY_TYPE_MON;
146 monc->con->peer_name.num = cpu_to_le64(monc->cur_mon);
147 ceph_con_open(monc->con,
148 &monc->monmap->mon_inst[monc->cur_mon].addr);
150 /* initiatiate authentication handshake */
151 ret = ceph_auth_build_hello(monc->auth,
152 monc->m_auth->front.iov_base,
153 monc->m_auth->front_max);
154 __send_prepared_auth_request(monc, ret);
156 dout("open_session mon%d already open\n", monc->cur_mon);
161 static bool __sub_expired(struct ceph_mon_client *monc)
163 return time_after_eq(jiffies, monc->sub_renew_after);
167 * Reschedule delayed work timer.
169 static void __schedule_delayed(struct ceph_mon_client *monc)
173 if (monc->cur_mon < 0 || __sub_expired(monc))
177 dout("__schedule_delayed after %u\n", delay);
178 schedule_delayed_work(&monc->delayed_work, delay);
182 * Send subscribe request for mdsmap and/or osdmap.
184 static void __send_subscribe(struct ceph_mon_client *monc)
186 dout("__send_subscribe sub_sent=%u exp=%u want_osd=%d\n",
187 (unsigned)monc->sub_sent, __sub_expired(monc),
188 monc->want_next_osdmap);
189 if ((__sub_expired(monc) && !monc->sub_sent) ||
190 monc->want_next_osdmap == 1) {
191 struct ceph_msg *msg = monc->m_subscribe;
192 struct ceph_mon_subscribe_item *i;
196 p = msg->front.iov_base;
197 end = p + msg->front_max;
199 num = 1 + !!monc->want_next_osdmap + !!monc->want_mdsmap;
200 ceph_encode_32(&p, num);
202 if (monc->want_next_osdmap) {
203 dout("__send_subscribe to 'osdmap' %u\n",
204 (unsigned)monc->have_osdmap);
205 ceph_encode_string(&p, end, "osdmap", 6);
207 i->have = cpu_to_le64(monc->have_osdmap);
210 monc->want_next_osdmap = 2; /* requested */
212 if (monc->want_mdsmap) {
213 dout("__send_subscribe to 'mdsmap' %u+\n",
214 (unsigned)monc->have_mdsmap);
215 ceph_encode_string(&p, end, "mdsmap", 6);
217 i->have = cpu_to_le64(monc->have_mdsmap);
221 ceph_encode_string(&p, end, "monmap", 6);
227 msg->front.iov_len = p - msg->front.iov_base;
228 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
229 ceph_con_revoke(monc->con, msg);
230 ceph_con_send(monc->con, ceph_msg_get(msg));
232 monc->sub_sent = jiffies | 1; /* never 0 */
236 static void handle_subscribe_ack(struct ceph_mon_client *monc,
237 struct ceph_msg *msg)
240 struct ceph_mon_subscribe_ack *h = msg->front.iov_base;
242 if (msg->front.iov_len < sizeof(*h))
244 seconds = le32_to_cpu(h->duration);
246 mutex_lock(&monc->mutex);
248 pr_info("mon%d %s session established\n",
250 ceph_pr_addr(&monc->con->peer_addr.in_addr));
251 monc->hunting = false;
253 dout("handle_subscribe_ack after %d seconds\n", seconds);
254 monc->sub_renew_after = monc->sub_sent + (seconds >> 1)*HZ - 1;
256 mutex_unlock(&monc->mutex);
259 pr_err("got corrupt subscribe-ack msg\n");
264 * Keep track of which maps we have
266 int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 got)
268 mutex_lock(&monc->mutex);
269 monc->have_mdsmap = got;
270 mutex_unlock(&monc->mutex);
273 EXPORT_SYMBOL(ceph_monc_got_mdsmap);
275 int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 got)
277 mutex_lock(&monc->mutex);
278 monc->have_osdmap = got;
279 monc->want_next_osdmap = 0;
280 mutex_unlock(&monc->mutex);
285 * Register interest in the next osdmap
287 void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc)
289 dout("request_next_osdmap have %u\n", monc->have_osdmap);
290 mutex_lock(&monc->mutex);
291 if (!monc->want_next_osdmap)
292 monc->want_next_osdmap = 1;
293 if (monc->want_next_osdmap < 2)
294 __send_subscribe(monc);
295 mutex_unlock(&monc->mutex);
301 int ceph_monc_open_session(struct ceph_mon_client *monc)
303 mutex_lock(&monc->mutex);
304 __open_session(monc);
305 __schedule_delayed(monc);
306 mutex_unlock(&monc->mutex);
309 EXPORT_SYMBOL(ceph_monc_open_session);
312 * The monitor responds with mount ack indicate mount success. The
313 * included client ticket allows the client to talk to MDSs and OSDs.
315 static void ceph_monc_handle_map(struct ceph_mon_client *monc,
316 struct ceph_msg *msg)
318 struct ceph_client *client = monc->client;
319 struct ceph_monmap *monmap = NULL, *old = monc->monmap;
322 mutex_lock(&monc->mutex);
324 dout("handle_monmap\n");
325 p = msg->front.iov_base;
326 end = p + msg->front.iov_len;
328 monmap = ceph_monmap_decode(p, end);
329 if (IS_ERR(monmap)) {
330 pr_err("problem decoding monmap, %d\n",
331 (int)PTR_ERR(monmap));
335 if (ceph_check_fsid(monc->client, &monmap->fsid) < 0) {
340 client->monc.monmap = monmap;
343 if (!client->have_fsid) {
344 client->have_fsid = true;
345 mutex_unlock(&monc->mutex);
347 * do debugfs initialization without mutex to avoid
348 * creating a locking dependency
350 ceph_debugfs_client_init(client);
354 mutex_unlock(&monc->mutex);
356 wake_up_all(&client->auth_wq);
360 * generic requests (e.g., statfs, poolop)
362 static struct ceph_mon_generic_request *__lookup_generic_req(
363 struct ceph_mon_client *monc, u64 tid)
365 struct ceph_mon_generic_request *req;
366 struct rb_node *n = monc->generic_request_tree.rb_node;
369 req = rb_entry(n, struct ceph_mon_generic_request, node);
372 else if (tid > req->tid)
380 static void __insert_generic_request(struct ceph_mon_client *monc,
381 struct ceph_mon_generic_request *new)
383 struct rb_node **p = &monc->generic_request_tree.rb_node;
384 struct rb_node *parent = NULL;
385 struct ceph_mon_generic_request *req = NULL;
389 req = rb_entry(parent, struct ceph_mon_generic_request, node);
390 if (new->tid < req->tid)
392 else if (new->tid > req->tid)
398 rb_link_node(&new->node, parent, p);
399 rb_insert_color(&new->node, &monc->generic_request_tree);
402 static void release_generic_request(struct kref *kref)
404 struct ceph_mon_generic_request *req =
405 container_of(kref, struct ceph_mon_generic_request, kref);
408 ceph_msg_put(req->reply);
410 ceph_msg_put(req->request);
415 static void put_generic_request(struct ceph_mon_generic_request *req)
417 kref_put(&req->kref, release_generic_request);
420 static void get_generic_request(struct ceph_mon_generic_request *req)
422 kref_get(&req->kref);
425 static struct ceph_msg *get_generic_reply(struct ceph_connection *con,
426 struct ceph_msg_header *hdr,
429 struct ceph_mon_client *monc = con->private;
430 struct ceph_mon_generic_request *req;
431 u64 tid = le64_to_cpu(hdr->tid);
434 mutex_lock(&monc->mutex);
435 req = __lookup_generic_req(monc, tid);
437 dout("get_generic_reply %lld dne\n", tid);
441 dout("get_generic_reply %lld got %p\n", tid, req->reply);
442 m = ceph_msg_get(req->reply);
444 * we don't need to track the connection reading into
445 * this reply because we only have one open connection
449 mutex_unlock(&monc->mutex);
453 static int do_generic_request(struct ceph_mon_client *monc,
454 struct ceph_mon_generic_request *req)
458 /* register request */
459 mutex_lock(&monc->mutex);
460 req->tid = ++monc->last_tid;
461 req->request->hdr.tid = cpu_to_le64(req->tid);
462 __insert_generic_request(monc, req);
463 monc->num_generic_requests++;
464 ceph_con_send(monc->con, ceph_msg_get(req->request));
465 mutex_unlock(&monc->mutex);
467 err = wait_for_completion_interruptible(&req->completion);
469 mutex_lock(&monc->mutex);
470 rb_erase(&req->node, &monc->generic_request_tree);
471 monc->num_generic_requests--;
472 mutex_unlock(&monc->mutex);
482 static void handle_statfs_reply(struct ceph_mon_client *monc,
483 struct ceph_msg *msg)
485 struct ceph_mon_generic_request *req;
486 struct ceph_mon_statfs_reply *reply = msg->front.iov_base;
487 u64 tid = le64_to_cpu(msg->hdr.tid);
489 if (msg->front.iov_len != sizeof(*reply))
491 dout("handle_statfs_reply %p tid %llu\n", msg, tid);
493 mutex_lock(&monc->mutex);
494 req = __lookup_generic_req(monc, tid);
496 *(struct ceph_statfs *)req->buf = reply->st;
498 get_generic_request(req);
500 mutex_unlock(&monc->mutex);
502 complete_all(&req->completion);
503 put_generic_request(req);
508 pr_err("corrupt generic reply, tid %llu\n", tid);
513 * Do a synchronous statfs().
515 int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf)
517 struct ceph_mon_generic_request *req;
518 struct ceph_mon_statfs *h;
521 req = kzalloc(sizeof(*req), GFP_NOFS);
525 kref_init(&req->kref);
527 req->buf_len = sizeof(*buf);
528 init_completion(&req->completion);
531 req->request = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), GFP_NOFS,
535 req->reply = ceph_msg_new(CEPH_MSG_STATFS_REPLY, 1024, GFP_NOFS,
540 /* fill out request */
541 h = req->request->front.iov_base;
542 h->monhdr.have_version = 0;
543 h->monhdr.session_mon = cpu_to_le16(-1);
544 h->monhdr.session_mon_tid = 0;
545 h->fsid = monc->monmap->fsid;
547 err = do_generic_request(monc, req);
550 kref_put(&req->kref, release_generic_request);
553 EXPORT_SYMBOL(ceph_monc_do_statfs);
558 static int get_poolop_reply_buf(const char *src, size_t src_len,
559 char *dst, size_t dst_len)
563 if (src_len != sizeof(u32) + dst_len)
566 buf_len = le32_to_cpu(*(u32 *)src);
567 if (buf_len != dst_len)
570 memcpy(dst, src + sizeof(u32), dst_len);
574 static void handle_poolop_reply(struct ceph_mon_client *monc,
575 struct ceph_msg *msg)
577 struct ceph_mon_generic_request *req;
578 struct ceph_mon_poolop_reply *reply = msg->front.iov_base;
579 u64 tid = le64_to_cpu(msg->hdr.tid);
581 if (msg->front.iov_len < sizeof(*reply))
583 dout("handle_poolop_reply %p tid %llu\n", msg, tid);
585 mutex_lock(&monc->mutex);
586 req = __lookup_generic_req(monc, tid);
589 get_poolop_reply_buf(msg->front.iov_base + sizeof(*reply),
590 msg->front.iov_len - sizeof(*reply),
591 req->buf, req->buf_len) < 0) {
592 mutex_unlock(&monc->mutex);
595 req->result = le32_to_cpu(reply->reply_code);
596 get_generic_request(req);
598 mutex_unlock(&monc->mutex);
600 complete(&req->completion);
601 put_generic_request(req);
606 pr_err("corrupt generic reply, tid %llu\n", tid);
611 * Do a synchronous pool op.
613 int ceph_monc_do_poolop(struct ceph_mon_client *monc, u32 op,
614 u32 pool, u64 snapid,
617 struct ceph_mon_generic_request *req;
618 struct ceph_mon_poolop *h;
621 req = kzalloc(sizeof(*req), GFP_NOFS);
625 kref_init(&req->kref);
628 init_completion(&req->completion);
631 req->request = ceph_msg_new(CEPH_MSG_POOLOP, sizeof(*h), GFP_NOFS,
635 req->reply = ceph_msg_new(CEPH_MSG_POOLOP_REPLY, 1024, GFP_NOFS,
640 /* fill out request */
641 req->request->hdr.version = cpu_to_le16(2);
642 h = req->request->front.iov_base;
643 h->monhdr.have_version = 0;
644 h->monhdr.session_mon = cpu_to_le16(-1);
645 h->monhdr.session_mon_tid = 0;
646 h->fsid = monc->monmap->fsid;
647 h->pool = cpu_to_le32(pool);
648 h->op = cpu_to_le32(op);
650 h->snapid = cpu_to_le64(snapid);
653 err = do_generic_request(monc, req);
656 kref_put(&req->kref, release_generic_request);
660 int ceph_monc_create_snapid(struct ceph_mon_client *monc,
661 u32 pool, u64 *snapid)
663 return ceph_monc_do_poolop(monc, POOL_OP_CREATE_UNMANAGED_SNAP,
664 pool, 0, (char *)snapid, sizeof(*snapid));
667 EXPORT_SYMBOL(ceph_monc_create_snapid);
669 int ceph_monc_delete_snapid(struct ceph_mon_client *monc,
670 u32 pool, u64 snapid)
672 return ceph_monc_do_poolop(monc, POOL_OP_CREATE_UNMANAGED_SNAP,
678 * Resend pending generic requests.
680 static void __resend_generic_request(struct ceph_mon_client *monc)
682 struct ceph_mon_generic_request *req;
685 for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) {
686 req = rb_entry(p, struct ceph_mon_generic_request, node);
687 ceph_con_revoke(monc->con, req->request);
688 ceph_con_send(monc->con, ceph_msg_get(req->request));
693 * Delayed work. If we haven't mounted yet, retry. Otherwise,
694 * renew/retry subscription as needed (in case it is timing out, or we
695 * got an ENOMEM). And keep the monitor connection alive.
697 static void delayed_work(struct work_struct *work)
699 struct ceph_mon_client *monc =
700 container_of(work, struct ceph_mon_client, delayed_work.work);
702 dout("monc delayed_work\n");
703 mutex_lock(&monc->mutex);
705 __close_session(monc);
706 __open_session(monc); /* continue hunting */
708 ceph_con_keepalive(monc->con);
710 __validate_auth(monc);
712 if (monc->auth->ops->is_authenticated(monc->auth))
713 __send_subscribe(monc);
715 __schedule_delayed(monc);
716 mutex_unlock(&monc->mutex);
720 * On startup, we build a temporary monmap populated with the IPs
721 * provided by mount(2).
723 static int build_initial_monmap(struct ceph_mon_client *monc)
725 struct ceph_options *opt = monc->client->options;
726 struct ceph_entity_addr *mon_addr = opt->mon_addr;
727 int num_mon = opt->num_mon;
730 /* build initial monmap */
731 monc->monmap = kzalloc(sizeof(*monc->monmap) +
732 num_mon*sizeof(monc->monmap->mon_inst[0]),
736 for (i = 0; i < num_mon; i++) {
737 monc->monmap->mon_inst[i].addr = mon_addr[i];
738 monc->monmap->mon_inst[i].addr.nonce = 0;
739 monc->monmap->mon_inst[i].name.type =
740 CEPH_ENTITY_TYPE_MON;
741 monc->monmap->mon_inst[i].name.num = cpu_to_le64(i);
743 monc->monmap->num_mon = num_mon;
744 monc->have_fsid = false;
748 int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl)
753 memset(monc, 0, sizeof(*monc));
756 mutex_init(&monc->mutex);
758 err = build_initial_monmap(monc);
763 monc->con = kmalloc(sizeof(*monc->con), GFP_KERNEL);
766 ceph_con_init(monc->client->msgr, monc->con);
767 monc->con->private = monc;
768 monc->con->ops = &mon_con_ops;
771 monc->auth = ceph_auth_init(cl->options->name,
773 if (IS_ERR(monc->auth)) {
774 err = PTR_ERR(monc->auth);
777 monc->auth->want_keys =
778 CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON |
779 CEPH_ENTITY_TYPE_OSD | CEPH_ENTITY_TYPE_MDS;
783 monc->m_subscribe_ack = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE_ACK,
784 sizeof(struct ceph_mon_subscribe_ack),
786 if (!monc->m_subscribe_ack)
789 monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 96, GFP_NOFS,
791 if (!monc->m_subscribe)
792 goto out_subscribe_ack;
794 monc->m_auth_reply = ceph_msg_new(CEPH_MSG_AUTH_REPLY, 4096, GFP_NOFS,
796 if (!monc->m_auth_reply)
799 monc->m_auth = ceph_msg_new(CEPH_MSG_AUTH, 4096, GFP_NOFS, true);
800 monc->pending_auth = 0;
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);
828 monc->con->ops->put(monc->con);
834 EXPORT_SYMBOL(ceph_monc_init);
836 void ceph_monc_stop(struct ceph_mon_client *monc)
839 cancel_delayed_work_sync(&monc->delayed_work);
841 mutex_lock(&monc->mutex);
842 __close_session(monc);
844 monc->con->private = NULL;
845 monc->con->ops->put(monc->con);
848 mutex_unlock(&monc->mutex);
850 ceph_auth_destroy(monc->auth);
852 ceph_msg_put(monc->m_auth);
853 ceph_msg_put(monc->m_auth_reply);
854 ceph_msg_put(monc->m_subscribe);
855 ceph_msg_put(monc->m_subscribe_ack);
859 EXPORT_SYMBOL(ceph_monc_stop);
861 static void handle_auth_reply(struct ceph_mon_client *monc,
862 struct ceph_msg *msg)
867 mutex_lock(&monc->mutex);
869 was_auth = monc->auth->ops->is_authenticated(monc->auth);
870 monc->pending_auth = 0;
871 ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base,
873 monc->m_auth->front.iov_base,
874 monc->m_auth->front_max);
876 monc->client->auth_err = ret;
877 wake_up_all(&monc->client->auth_wq);
878 } else if (ret > 0) {
879 __send_prepared_auth_request(monc, ret);
880 } else if (!was_auth && monc->auth->ops->is_authenticated(monc->auth)) {
881 dout("authenticated, starting session\n");
883 monc->client->msgr->inst.name.type = CEPH_ENTITY_TYPE_CLIENT;
884 monc->client->msgr->inst.name.num =
885 cpu_to_le64(monc->auth->global_id);
887 __send_subscribe(monc);
888 __resend_generic_request(monc);
890 mutex_unlock(&monc->mutex);
893 static int __validate_auth(struct ceph_mon_client *monc)
897 if (monc->pending_auth)
900 ret = ceph_build_auth(monc->auth, monc->m_auth->front.iov_base,
901 monc->m_auth->front_max);
903 return ret; /* either an error, or no need to authenticate */
904 __send_prepared_auth_request(monc, ret);
908 int ceph_monc_validate_auth(struct ceph_mon_client *monc)
912 mutex_lock(&monc->mutex);
913 ret = __validate_auth(monc);
914 mutex_unlock(&monc->mutex);
917 EXPORT_SYMBOL(ceph_monc_validate_auth);
920 * handle incoming message
922 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
924 struct ceph_mon_client *monc = con->private;
925 int type = le16_to_cpu(msg->hdr.type);
931 case CEPH_MSG_AUTH_REPLY:
932 handle_auth_reply(monc, msg);
935 case CEPH_MSG_MON_SUBSCRIBE_ACK:
936 handle_subscribe_ack(monc, msg);
939 case CEPH_MSG_STATFS_REPLY:
940 handle_statfs_reply(monc, msg);
943 case CEPH_MSG_POOLOP_REPLY:
944 handle_poolop_reply(monc, msg);
947 case CEPH_MSG_MON_MAP:
948 ceph_monc_handle_map(monc, msg);
951 case CEPH_MSG_OSD_MAP:
952 ceph_osdc_handle_map(&monc->client->osdc, msg);
956 /* can the chained handler handle it? */
957 if (monc->client->extra_mon_dispatch &&
958 monc->client->extra_mon_dispatch(monc->client, msg) == 0)
961 pr_err("received unknown message type %d %s\n", type,
962 ceph_msg_type_name(type));
968 * Allocate memory for incoming message
970 static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
971 struct ceph_msg_header *hdr,
974 struct ceph_mon_client *monc = con->private;
975 int type = le16_to_cpu(hdr->type);
976 int front_len = le32_to_cpu(hdr->front_len);
977 struct ceph_msg *m = NULL;
982 case CEPH_MSG_MON_SUBSCRIBE_ACK:
983 m = ceph_msg_get(monc->m_subscribe_ack);
985 case CEPH_MSG_POOLOP_REPLY:
986 case CEPH_MSG_STATFS_REPLY:
987 return get_generic_reply(con, hdr, skip);
988 case CEPH_MSG_AUTH_REPLY:
989 m = ceph_msg_get(monc->m_auth_reply);
991 case CEPH_MSG_MON_MAP:
992 case CEPH_MSG_MDS_MAP:
993 case CEPH_MSG_OSD_MAP:
994 m = ceph_msg_new(type, front_len, GFP_NOFS, false);
999 pr_info("alloc_msg unknown type %d\n", type);
1006 * If the monitor connection resets, pick a new monitor and resubmit
1007 * any pending requests.
1009 static void mon_fault(struct ceph_connection *con)
1011 struct ceph_mon_client *monc = con->private;
1016 dout("mon_fault\n");
1017 mutex_lock(&monc->mutex);
1022 pr_info("mon%d %s session lost, "
1023 "hunting for new mon\n", monc->cur_mon,
1024 ceph_pr_addr(&monc->con->peer_addr.in_addr));
1026 __close_session(monc);
1027 if (!monc->hunting) {
1029 monc->hunting = true;
1030 __open_session(monc);
1032 /* already hunting, let's wait a bit */
1033 __schedule_delayed(monc);
1036 mutex_unlock(&monc->mutex);
1039 static const struct ceph_connection_operations mon_con_ops = {
1040 .get = ceph_con_get,
1041 .put = ceph_con_put,
1042 .dispatch = dispatch,
1044 .alloc_msg = mon_alloc_msg,