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Commit | Line | Data |
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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
ba75bb98 | 2 | |
3d14c5d2 | 3 | #include <linux/module.h> |
ba75bb98 | 4 | #include <linux/types.h> |
5a0e3ad6 | 5 | #include <linux/slab.h> |
ba75bb98 SW |
6 | #include <linux/random.h> |
7 | #include <linux/sched.h> | |
8 | ||
3d14c5d2 YS |
9 | #include <linux/ceph/mon_client.h> |
10 | #include <linux/ceph/libceph.h> | |
ab434b60 | 11 | #include <linux/ceph/debugfs.h> |
3d14c5d2 | 12 | #include <linux/ceph/decode.h> |
3d14c5d2 | 13 | #include <linux/ceph/auth.h> |
ba75bb98 SW |
14 | |
15 | /* | |
16 | * Interact with Ceph monitor cluster. Handle requests for new map | |
17 | * versions, and periodically resend as needed. Also implement | |
18 | * statfs() and umount(). | |
19 | * | |
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. | |
25 | * | |
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. | |
31 | */ | |
32 | ||
9e32789f | 33 | static const struct ceph_connection_operations mon_con_ops; |
ba75bb98 | 34 | |
9bd2e6f8 SW |
35 | static int __validate_auth(struct ceph_mon_client *monc); |
36 | ||
ba75bb98 SW |
37 | /* |
38 | * Decode a monmap blob (e.g., during mount). | |
39 | */ | |
40 | struct ceph_monmap *ceph_monmap_decode(void *p, void *end) | |
41 | { | |
42 | struct ceph_monmap *m = NULL; | |
43 | int i, err = -EINVAL; | |
44 | struct ceph_fsid fsid; | |
45 | u32 epoch, num_mon; | |
46 | u16 version; | |
4e7a5dcd SW |
47 | u32 len; |
48 | ||
49 | ceph_decode_32_safe(&p, end, len, bad); | |
50 | ceph_decode_need(&p, end, len, bad); | |
ba75bb98 SW |
51 | |
52 | dout("monmap_decode %p %p len %d\n", p, end, (int)(end-p)); | |
53 | ||
54 | ceph_decode_16_safe(&p, end, version, bad); | |
55 | ||
56 | ceph_decode_need(&p, end, sizeof(fsid) + 2*sizeof(u32), bad); | |
57 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
c89136ea | 58 | epoch = ceph_decode_32(&p); |
ba75bb98 | 59 | |
c89136ea | 60 | num_mon = ceph_decode_32(&p); |
ba75bb98 SW |
61 | ceph_decode_need(&p, end, num_mon*sizeof(m->mon_inst[0]), bad); |
62 | ||
63 | if (num_mon >= CEPH_MAX_MON) | |
64 | goto bad; | |
65 | m = kmalloc(sizeof(*m) + sizeof(m->mon_inst[0])*num_mon, GFP_NOFS); | |
66 | if (m == NULL) | |
67 | return ERR_PTR(-ENOMEM); | |
68 | m->fsid = fsid; | |
69 | m->epoch = epoch; | |
70 | m->num_mon = num_mon; | |
71 | ceph_decode_copy(&p, m->mon_inst, num_mon*sizeof(m->mon_inst[0])); | |
63f2d211 SW |
72 | for (i = 0; i < num_mon; i++) |
73 | ceph_decode_addr(&m->mon_inst[i].addr); | |
ba75bb98 | 74 | |
ba75bb98 SW |
75 | dout("monmap_decode epoch %d, num_mon %d\n", m->epoch, |
76 | m->num_mon); | |
77 | for (i = 0; i < m->num_mon; i++) | |
78 | dout("monmap_decode mon%d is %s\n", i, | |
3d14c5d2 | 79 | ceph_pr_addr(&m->mon_inst[i].addr.in_addr)); |
ba75bb98 SW |
80 | return m; |
81 | ||
82 | bad: | |
83 | dout("monmap_decode failed with %d\n", err); | |
84 | kfree(m); | |
85 | return ERR_PTR(err); | |
86 | } | |
87 | ||
88 | /* | |
89 | * return true if *addr is included in the monmap. | |
90 | */ | |
91 | int ceph_monmap_contains(struct ceph_monmap *m, struct ceph_entity_addr *addr) | |
92 | { | |
93 | int i; | |
94 | ||
95 | for (i = 0; i < m->num_mon; i++) | |
103e2d3a | 96 | if (memcmp(addr, &m->mon_inst[i].addr, sizeof(*addr)) == 0) |
ba75bb98 SW |
97 | return 1; |
98 | return 0; | |
99 | } | |
100 | ||
5ce6e9db SW |
101 | /* |
102 | * Send an auth request. | |
103 | */ | |
104 | static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len) | |
105 | { | |
106 | monc->pending_auth = 1; | |
107 | monc->m_auth->front.iov_len = len; | |
108 | monc->m_auth->hdr.front_len = cpu_to_le32(len); | |
6740a845 | 109 | ceph_msg_revoke(monc->m_auth); |
5ce6e9db | 110 | ceph_msg_get(monc->m_auth); /* keep our ref */ |
67130934 | 111 | ceph_con_send(&monc->con, monc->m_auth); |
5ce6e9db SW |
112 | } |
113 | ||
ba75bb98 SW |
114 | /* |
115 | * Close monitor session, if any. | |
116 | */ | |
117 | static void __close_session(struct ceph_mon_client *monc) | |
118 | { | |
f6a2f5be | 119 | dout("__close_session closing mon%d\n", monc->cur_mon); |
6740a845 | 120 | ceph_msg_revoke(monc->m_auth); |
67130934 | 121 | ceph_con_close(&monc->con); |
20581c1f | 122 | monc->con.private = NULL; |
f6a2f5be SW |
123 | monc->cur_mon = -1; |
124 | monc->pending_auth = 0; | |
125 | ceph_auth_reset(monc->auth); | |
ba75bb98 SW |
126 | } |
127 | ||
128 | /* | |
129 | * Open a session with a (new) monitor. | |
130 | */ | |
131 | static int __open_session(struct ceph_mon_client *monc) | |
132 | { | |
133 | char r; | |
4e7a5dcd | 134 | int ret; |
ba75bb98 SW |
135 | |
136 | if (monc->cur_mon < 0) { | |
137 | get_random_bytes(&r, 1); | |
138 | monc->cur_mon = r % monc->monmap->num_mon; | |
139 | dout("open_session num=%d r=%d -> mon%d\n", | |
140 | monc->monmap->num_mon, r, monc->cur_mon); | |
141 | monc->sub_sent = 0; | |
142 | monc->sub_renew_after = jiffies; /* i.e., expired */ | |
143 | monc->want_next_osdmap = !!monc->want_next_osdmap; | |
144 | ||
1bfd89f4 | 145 | ceph_con_init(&monc->con, monc, &mon_con_ops, |
b7a9e5dd | 146 | &monc->client->msgr); |
20581c1f AE |
147 | |
148 | dout("open_session mon%d opening\n", monc->cur_mon); | |
67130934 | 149 | ceph_con_open(&monc->con, |
b7a9e5dd | 150 | CEPH_ENTITY_TYPE_MON, monc->cur_mon, |
ba75bb98 | 151 | &monc->monmap->mon_inst[monc->cur_mon].addr); |
4e7a5dcd SW |
152 | |
153 | /* initiatiate authentication handshake */ | |
154 | ret = ceph_auth_build_hello(monc->auth, | |
155 | monc->m_auth->front.iov_base, | |
156 | monc->m_auth->front_max); | |
5ce6e9db | 157 | __send_prepared_auth_request(monc, ret); |
ba75bb98 SW |
158 | } else { |
159 | dout("open_session mon%d already open\n", monc->cur_mon); | |
160 | } | |
161 | return 0; | |
162 | } | |
163 | ||
164 | static bool __sub_expired(struct ceph_mon_client *monc) | |
165 | { | |
166 | return time_after_eq(jiffies, monc->sub_renew_after); | |
167 | } | |
168 | ||
169 | /* | |
170 | * Reschedule delayed work timer. | |
171 | */ | |
172 | static void __schedule_delayed(struct ceph_mon_client *monc) | |
173 | { | |
95c96174 | 174 | unsigned int delay; |
ba75bb98 | 175 | |
4e7a5dcd | 176 | if (monc->cur_mon < 0 || __sub_expired(monc)) |
ba75bb98 SW |
177 | delay = 10 * HZ; |
178 | else | |
179 | delay = 20 * HZ; | |
180 | dout("__schedule_delayed after %u\n", delay); | |
181 | schedule_delayed_work(&monc->delayed_work, delay); | |
182 | } | |
183 | ||
184 | /* | |
185 | * Send subscribe request for mdsmap and/or osdmap. | |
186 | */ | |
187 | static void __send_subscribe(struct ceph_mon_client *monc) | |
188 | { | |
189 | dout("__send_subscribe sub_sent=%u exp=%u want_osd=%d\n", | |
95c96174 | 190 | (unsigned int)monc->sub_sent, __sub_expired(monc), |
ba75bb98 SW |
191 | monc->want_next_osdmap); |
192 | if ((__sub_expired(monc) && !monc->sub_sent) || | |
193 | monc->want_next_osdmap == 1) { | |
240ed68e | 194 | struct ceph_msg *msg = monc->m_subscribe; |
ba75bb98 SW |
195 | struct ceph_mon_subscribe_item *i; |
196 | void *p, *end; | |
3d14c5d2 | 197 | int num; |
ba75bb98 | 198 | |
ba75bb98 | 199 | p = msg->front.iov_base; |
240ed68e | 200 | end = p + msg->front_max; |
ba75bb98 | 201 | |
3d14c5d2 YS |
202 | num = 1 + !!monc->want_next_osdmap + !!monc->want_mdsmap; |
203 | ceph_encode_32(&p, num); | |
204 | ||
ba75bb98 SW |
205 | if (monc->want_next_osdmap) { |
206 | dout("__send_subscribe to 'osdmap' %u\n", | |
95c96174 | 207 | (unsigned int)monc->have_osdmap); |
ba75bb98 SW |
208 | ceph_encode_string(&p, end, "osdmap", 6); |
209 | i = p; | |
210 | i->have = cpu_to_le64(monc->have_osdmap); | |
211 | i->onetime = 1; | |
212 | p += sizeof(*i); | |
213 | monc->want_next_osdmap = 2; /* requested */ | |
ba75bb98 | 214 | } |
3d14c5d2 YS |
215 | if (monc->want_mdsmap) { |
216 | dout("__send_subscribe to 'mdsmap' %u+\n", | |
95c96174 | 217 | (unsigned int)monc->have_mdsmap); |
3d14c5d2 YS |
218 | ceph_encode_string(&p, end, "mdsmap", 6); |
219 | i = p; | |
220 | i->have = cpu_to_le64(monc->have_mdsmap); | |
221 | i->onetime = 0; | |
222 | p += sizeof(*i); | |
223 | } | |
4e7a5dcd SW |
224 | ceph_encode_string(&p, end, "monmap", 6); |
225 | i = p; | |
226 | i->have = 0; | |
227 | i->onetime = 0; | |
228 | p += sizeof(*i); | |
ba75bb98 SW |
229 | |
230 | msg->front.iov_len = p - msg->front.iov_base; | |
231 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
6740a845 | 232 | ceph_msg_revoke(msg); |
67130934 | 233 | ceph_con_send(&monc->con, ceph_msg_get(msg)); |
ba75bb98 SW |
234 | |
235 | monc->sub_sent = jiffies | 1; /* never 0 */ | |
236 | } | |
237 | } | |
238 | ||
239 | static void handle_subscribe_ack(struct ceph_mon_client *monc, | |
240 | struct ceph_msg *msg) | |
241 | { | |
95c96174 | 242 | unsigned int seconds; |
07bd10fb SW |
243 | struct ceph_mon_subscribe_ack *h = msg->front.iov_base; |
244 | ||
245 | if (msg->front.iov_len < sizeof(*h)) | |
246 | goto bad; | |
247 | seconds = le32_to_cpu(h->duration); | |
ba75bb98 | 248 | |
ba75bb98 SW |
249 | mutex_lock(&monc->mutex); |
250 | if (monc->hunting) { | |
251 | pr_info("mon%d %s session established\n", | |
3d14c5d2 | 252 | monc->cur_mon, |
67130934 | 253 | ceph_pr_addr(&monc->con.peer_addr.in_addr)); |
ba75bb98 SW |
254 | monc->hunting = false; |
255 | } | |
256 | dout("handle_subscribe_ack after %d seconds\n", seconds); | |
0656d11b | 257 | monc->sub_renew_after = monc->sub_sent + (seconds >> 1)*HZ - 1; |
ba75bb98 SW |
258 | monc->sub_sent = 0; |
259 | mutex_unlock(&monc->mutex); | |
260 | return; | |
261 | bad: | |
262 | pr_err("got corrupt subscribe-ack msg\n"); | |
9ec7cab1 | 263 | ceph_msg_dump(msg); |
ba75bb98 SW |
264 | } |
265 | ||
266 | /* | |
267 | * Keep track of which maps we have | |
268 | */ | |
269 | int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 got) | |
270 | { | |
271 | mutex_lock(&monc->mutex); | |
272 | monc->have_mdsmap = got; | |
273 | mutex_unlock(&monc->mutex); | |
274 | return 0; | |
275 | } | |
3d14c5d2 | 276 | EXPORT_SYMBOL(ceph_monc_got_mdsmap); |
ba75bb98 SW |
277 | |
278 | int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 got) | |
279 | { | |
280 | mutex_lock(&monc->mutex); | |
281 | monc->have_osdmap = got; | |
282 | monc->want_next_osdmap = 0; | |
283 | mutex_unlock(&monc->mutex); | |
284 | return 0; | |
285 | } | |
286 | ||
287 | /* | |
288 | * Register interest in the next osdmap | |
289 | */ | |
290 | void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc) | |
291 | { | |
292 | dout("request_next_osdmap have %u\n", monc->have_osdmap); | |
293 | mutex_lock(&monc->mutex); | |
294 | if (!monc->want_next_osdmap) | |
295 | monc->want_next_osdmap = 1; | |
296 | if (monc->want_next_osdmap < 2) | |
297 | __send_subscribe(monc); | |
298 | mutex_unlock(&monc->mutex); | |
299 | } | |
300 | ||
4e7a5dcd | 301 | /* |
50b885b9 | 302 | * |
4e7a5dcd SW |
303 | */ |
304 | int ceph_monc_open_session(struct ceph_mon_client *monc) | |
ba75bb98 | 305 | { |
ba75bb98 | 306 | mutex_lock(&monc->mutex); |
4e7a5dcd | 307 | __open_session(monc); |
ba75bb98 SW |
308 | __schedule_delayed(monc); |
309 | mutex_unlock(&monc->mutex); | |
310 | return 0; | |
311 | } | |
3d14c5d2 | 312 | EXPORT_SYMBOL(ceph_monc_open_session); |
ba75bb98 | 313 | |
4e7a5dcd SW |
314 | /* |
315 | * The monitor responds with mount ack indicate mount success. The | |
316 | * included client ticket allows the client to talk to MDSs and OSDs. | |
317 | */ | |
0743304d SW |
318 | static void ceph_monc_handle_map(struct ceph_mon_client *monc, |
319 | struct ceph_msg *msg) | |
4e7a5dcd SW |
320 | { |
321 | struct ceph_client *client = monc->client; | |
322 | struct ceph_monmap *monmap = NULL, *old = monc->monmap; | |
323 | void *p, *end; | |
324 | ||
325 | mutex_lock(&monc->mutex); | |
326 | ||
327 | dout("handle_monmap\n"); | |
328 | p = msg->front.iov_base; | |
329 | end = p + msg->front.iov_len; | |
330 | ||
331 | monmap = ceph_monmap_decode(p, end); | |
332 | if (IS_ERR(monmap)) { | |
333 | pr_err("problem decoding monmap, %d\n", | |
334 | (int)PTR_ERR(monmap)); | |
d4a780ce | 335 | goto out; |
4e7a5dcd | 336 | } |
0743304d SW |
337 | |
338 | if (ceph_check_fsid(monc->client, &monmap->fsid) < 0) { | |
4e7a5dcd | 339 | kfree(monmap); |
d4a780ce | 340 | goto out; |
4e7a5dcd SW |
341 | } |
342 | ||
343 | client->monc.monmap = monmap; | |
4e7a5dcd SW |
344 | kfree(old); |
345 | ||
ab434b60 SW |
346 | if (!client->have_fsid) { |
347 | client->have_fsid = true; | |
348 | mutex_unlock(&monc->mutex); | |
349 | /* | |
350 | * do debugfs initialization without mutex to avoid | |
351 | * creating a locking dependency | |
352 | */ | |
353 | ceph_debugfs_client_init(client); | |
354 | goto out_unlocked; | |
355 | } | |
d4a780ce | 356 | out: |
4e7a5dcd | 357 | mutex_unlock(&monc->mutex); |
ab434b60 | 358 | out_unlocked: |
03066f23 | 359 | wake_up_all(&client->auth_wq); |
4e7a5dcd SW |
360 | } |
361 | ||
ba75bb98 | 362 | /* |
e56fa10e | 363 | * generic requests (e.g., statfs, poolop) |
ba75bb98 | 364 | */ |
f8c76f6f | 365 | static struct ceph_mon_generic_request *__lookup_generic_req( |
85ff03f6 SW |
366 | struct ceph_mon_client *monc, u64 tid) |
367 | { | |
f8c76f6f YS |
368 | struct ceph_mon_generic_request *req; |
369 | struct rb_node *n = monc->generic_request_tree.rb_node; | |
85ff03f6 SW |
370 | |
371 | while (n) { | |
f8c76f6f | 372 | req = rb_entry(n, struct ceph_mon_generic_request, node); |
85ff03f6 SW |
373 | if (tid < req->tid) |
374 | n = n->rb_left; | |
375 | else if (tid > req->tid) | |
376 | n = n->rb_right; | |
377 | else | |
378 | return req; | |
379 | } | |
380 | return NULL; | |
381 | } | |
382 | ||
f8c76f6f YS |
383 | static void __insert_generic_request(struct ceph_mon_client *monc, |
384 | struct ceph_mon_generic_request *new) | |
85ff03f6 | 385 | { |
f8c76f6f | 386 | struct rb_node **p = &monc->generic_request_tree.rb_node; |
85ff03f6 | 387 | struct rb_node *parent = NULL; |
f8c76f6f | 388 | struct ceph_mon_generic_request *req = NULL; |
85ff03f6 SW |
389 | |
390 | while (*p) { | |
391 | parent = *p; | |
f8c76f6f | 392 | req = rb_entry(parent, struct ceph_mon_generic_request, node); |
85ff03f6 SW |
393 | if (new->tid < req->tid) |
394 | p = &(*p)->rb_left; | |
395 | else if (new->tid > req->tid) | |
396 | p = &(*p)->rb_right; | |
397 | else | |
398 | BUG(); | |
399 | } | |
400 | ||
401 | rb_link_node(&new->node, parent, p); | |
f8c76f6f | 402 | rb_insert_color(&new->node, &monc->generic_request_tree); |
85ff03f6 SW |
403 | } |
404 | ||
f8c76f6f | 405 | static void release_generic_request(struct kref *kref) |
3143edd3 | 406 | { |
f8c76f6f YS |
407 | struct ceph_mon_generic_request *req = |
408 | container_of(kref, struct ceph_mon_generic_request, kref); | |
3143edd3 SW |
409 | |
410 | if (req->reply) | |
411 | ceph_msg_put(req->reply); | |
412 | if (req->request) | |
413 | ceph_msg_put(req->request); | |
20547567 YS |
414 | |
415 | kfree(req); | |
3143edd3 SW |
416 | } |
417 | ||
f8c76f6f | 418 | static void put_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 | 419 | { |
f8c76f6f | 420 | kref_put(&req->kref, release_generic_request); |
3143edd3 SW |
421 | } |
422 | ||
f8c76f6f | 423 | static void get_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 SW |
424 | { |
425 | kref_get(&req->kref); | |
426 | } | |
427 | ||
f8c76f6f | 428 | static struct ceph_msg *get_generic_reply(struct ceph_connection *con, |
3143edd3 SW |
429 | struct ceph_msg_header *hdr, |
430 | int *skip) | |
431 | { | |
432 | struct ceph_mon_client *monc = con->private; | |
f8c76f6f | 433 | struct ceph_mon_generic_request *req; |
3143edd3 SW |
434 | u64 tid = le64_to_cpu(hdr->tid); |
435 | struct ceph_msg *m; | |
436 | ||
437 | mutex_lock(&monc->mutex); | |
f8c76f6f | 438 | req = __lookup_generic_req(monc, tid); |
3143edd3 | 439 | if (!req) { |
f8c76f6f | 440 | dout("get_generic_reply %lld dne\n", tid); |
3143edd3 SW |
441 | *skip = 1; |
442 | m = NULL; | |
443 | } else { | |
f8c76f6f | 444 | dout("get_generic_reply %lld got %p\n", tid, req->reply); |
1c20f2d2 | 445 | *skip = 0; |
3143edd3 SW |
446 | m = ceph_msg_get(req->reply); |
447 | /* | |
448 | * we don't need to track the connection reading into | |
449 | * this reply because we only have one open connection | |
450 | * at a time, ever. | |
451 | */ | |
452 | } | |
453 | mutex_unlock(&monc->mutex); | |
454 | return m; | |
455 | } | |
456 | ||
e56fa10e YS |
457 | static int do_generic_request(struct ceph_mon_client *monc, |
458 | struct ceph_mon_generic_request *req) | |
459 | { | |
460 | int err; | |
461 | ||
462 | /* register request */ | |
463 | mutex_lock(&monc->mutex); | |
464 | req->tid = ++monc->last_tid; | |
465 | req->request->hdr.tid = cpu_to_le64(req->tid); | |
466 | __insert_generic_request(monc, req); | |
467 | monc->num_generic_requests++; | |
67130934 | 468 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
e56fa10e YS |
469 | mutex_unlock(&monc->mutex); |
470 | ||
471 | err = wait_for_completion_interruptible(&req->completion); | |
472 | ||
473 | mutex_lock(&monc->mutex); | |
474 | rb_erase(&req->node, &monc->generic_request_tree); | |
475 | monc->num_generic_requests--; | |
476 | mutex_unlock(&monc->mutex); | |
477 | ||
478 | if (!err) | |
479 | err = req->result; | |
480 | return err; | |
481 | } | |
482 | ||
483 | /* | |
484 | * statfs | |
485 | */ | |
ba75bb98 SW |
486 | static void handle_statfs_reply(struct ceph_mon_client *monc, |
487 | struct ceph_msg *msg) | |
488 | { | |
f8c76f6f | 489 | struct ceph_mon_generic_request *req; |
ba75bb98 | 490 | struct ceph_mon_statfs_reply *reply = msg->front.iov_base; |
3143edd3 | 491 | u64 tid = le64_to_cpu(msg->hdr.tid); |
ba75bb98 SW |
492 | |
493 | if (msg->front.iov_len != sizeof(*reply)) | |
494 | goto bad; | |
ba75bb98 SW |
495 | dout("handle_statfs_reply %p tid %llu\n", msg, tid); |
496 | ||
497 | mutex_lock(&monc->mutex); | |
f8c76f6f | 498 | req = __lookup_generic_req(monc, tid); |
ba75bb98 | 499 | if (req) { |
f8c76f6f | 500 | *(struct ceph_statfs *)req->buf = reply->st; |
ba75bb98 | 501 | req->result = 0; |
f8c76f6f | 502 | get_generic_request(req); |
ba75bb98 SW |
503 | } |
504 | mutex_unlock(&monc->mutex); | |
3143edd3 | 505 | if (req) { |
03066f23 | 506 | complete_all(&req->completion); |
f8c76f6f | 507 | put_generic_request(req); |
3143edd3 | 508 | } |
ba75bb98 SW |
509 | return; |
510 | ||
511 | bad: | |
e56fa10e | 512 | pr_err("corrupt generic reply, tid %llu\n", tid); |
9ec7cab1 | 513 | ceph_msg_dump(msg); |
ba75bb98 SW |
514 | } |
515 | ||
516 | /* | |
3143edd3 | 517 | * Do a synchronous statfs(). |
ba75bb98 | 518 | */ |
3143edd3 | 519 | int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf) |
ba75bb98 | 520 | { |
f8c76f6f | 521 | struct ceph_mon_generic_request *req; |
ba75bb98 | 522 | struct ceph_mon_statfs *h; |
3143edd3 SW |
523 | int err; |
524 | ||
cffe7b6d | 525 | req = kzalloc(sizeof(*req), GFP_NOFS); |
3143edd3 SW |
526 | if (!req) |
527 | return -ENOMEM; | |
528 | ||
3143edd3 SW |
529 | kref_init(&req->kref); |
530 | req->buf = buf; | |
e56fa10e | 531 | req->buf_len = sizeof(*buf); |
3143edd3 | 532 | init_completion(&req->completion); |
ba75bb98 | 533 | |
a79832f2 | 534 | err = -ENOMEM; |
b61c2763 SW |
535 | req->request = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), GFP_NOFS, |
536 | true); | |
a79832f2 | 537 | if (!req->request) |
3143edd3 | 538 | goto out; |
b61c2763 SW |
539 | req->reply = ceph_msg_new(CEPH_MSG_STATFS_REPLY, 1024, GFP_NOFS, |
540 | true); | |
a79832f2 | 541 | if (!req->reply) |
3143edd3 | 542 | goto out; |
3143edd3 SW |
543 | |
544 | /* fill out request */ | |
545 | h = req->request->front.iov_base; | |
13e38c8a SW |
546 | h->monhdr.have_version = 0; |
547 | h->monhdr.session_mon = cpu_to_le16(-1); | |
548 | h->monhdr.session_mon_tid = 0; | |
ba75bb98 | 549 | h->fsid = monc->monmap->fsid; |
ba75bb98 | 550 | |
e56fa10e | 551 | err = do_generic_request(monc, req); |
ba75bb98 | 552 | |
e56fa10e YS |
553 | out: |
554 | kref_put(&req->kref, release_generic_request); | |
555 | return err; | |
556 | } | |
3d14c5d2 | 557 | EXPORT_SYMBOL(ceph_monc_do_statfs); |
e56fa10e YS |
558 | |
559 | /* | |
560 | * pool ops | |
561 | */ | |
562 | static int get_poolop_reply_buf(const char *src, size_t src_len, | |
563 | char *dst, size_t dst_len) | |
564 | { | |
565 | u32 buf_len; | |
566 | ||
567 | if (src_len != sizeof(u32) + dst_len) | |
568 | return -EINVAL; | |
569 | ||
570 | buf_len = le32_to_cpu(*(u32 *)src); | |
571 | if (buf_len != dst_len) | |
572 | return -EINVAL; | |
573 | ||
574 | memcpy(dst, src + sizeof(u32), dst_len); | |
575 | return 0; | |
576 | } | |
577 | ||
578 | static void handle_poolop_reply(struct ceph_mon_client *monc, | |
579 | struct ceph_msg *msg) | |
580 | { | |
581 | struct ceph_mon_generic_request *req; | |
582 | struct ceph_mon_poolop_reply *reply = msg->front.iov_base; | |
583 | u64 tid = le64_to_cpu(msg->hdr.tid); | |
584 | ||
585 | if (msg->front.iov_len < sizeof(*reply)) | |
586 | goto bad; | |
587 | dout("handle_poolop_reply %p tid %llu\n", msg, tid); | |
ba75bb98 SW |
588 | |
589 | mutex_lock(&monc->mutex); | |
e56fa10e YS |
590 | req = __lookup_generic_req(monc, tid); |
591 | if (req) { | |
592 | if (req->buf_len && | |
593 | get_poolop_reply_buf(msg->front.iov_base + sizeof(*reply), | |
594 | msg->front.iov_len - sizeof(*reply), | |
595 | req->buf, req->buf_len) < 0) { | |
596 | mutex_unlock(&monc->mutex); | |
597 | goto bad; | |
598 | } | |
599 | req->result = le32_to_cpu(reply->reply_code); | |
600 | get_generic_request(req); | |
601 | } | |
ba75bb98 | 602 | mutex_unlock(&monc->mutex); |
e56fa10e YS |
603 | if (req) { |
604 | complete(&req->completion); | |
605 | put_generic_request(req); | |
606 | } | |
607 | return; | |
ba75bb98 | 608 | |
e56fa10e YS |
609 | bad: |
610 | pr_err("corrupt generic reply, tid %llu\n", tid); | |
611 | ceph_msg_dump(msg); | |
612 | } | |
613 | ||
614 | /* | |
615 | * Do a synchronous pool op. | |
616 | */ | |
617 | int ceph_monc_do_poolop(struct ceph_mon_client *monc, u32 op, | |
618 | u32 pool, u64 snapid, | |
619 | char *buf, int len) | |
620 | { | |
621 | struct ceph_mon_generic_request *req; | |
622 | struct ceph_mon_poolop *h; | |
623 | int err; | |
624 | ||
625 | req = kzalloc(sizeof(*req), GFP_NOFS); | |
626 | if (!req) | |
627 | return -ENOMEM; | |
628 | ||
629 | kref_init(&req->kref); | |
630 | req->buf = buf; | |
631 | req->buf_len = len; | |
632 | init_completion(&req->completion); | |
633 | ||
634 | err = -ENOMEM; | |
b61c2763 SW |
635 | req->request = ceph_msg_new(CEPH_MSG_POOLOP, sizeof(*h), GFP_NOFS, |
636 | true); | |
e56fa10e YS |
637 | if (!req->request) |
638 | goto out; | |
b61c2763 SW |
639 | req->reply = ceph_msg_new(CEPH_MSG_POOLOP_REPLY, 1024, GFP_NOFS, |
640 | true); | |
e56fa10e YS |
641 | if (!req->reply) |
642 | goto out; | |
643 | ||
644 | /* fill out request */ | |
645 | req->request->hdr.version = cpu_to_le16(2); | |
646 | h = req->request->front.iov_base; | |
647 | h->monhdr.have_version = 0; | |
648 | h->monhdr.session_mon = cpu_to_le16(-1); | |
649 | h->monhdr.session_mon_tid = 0; | |
650 | h->fsid = monc->monmap->fsid; | |
651 | h->pool = cpu_to_le32(pool); | |
652 | h->op = cpu_to_le32(op); | |
653 | h->auid = 0; | |
654 | h->snapid = cpu_to_le64(snapid); | |
655 | h->name_len = 0; | |
656 | ||
657 | err = do_generic_request(monc, req); | |
3143edd3 SW |
658 | |
659 | out: | |
f8c76f6f | 660 | kref_put(&req->kref, release_generic_request); |
ba75bb98 SW |
661 | return err; |
662 | } | |
663 | ||
e56fa10e YS |
664 | int ceph_monc_create_snapid(struct ceph_mon_client *monc, |
665 | u32 pool, u64 *snapid) | |
666 | { | |
667 | return ceph_monc_do_poolop(monc, POOL_OP_CREATE_UNMANAGED_SNAP, | |
668 | pool, 0, (char *)snapid, sizeof(*snapid)); | |
669 | ||
670 | } | |
3d14c5d2 | 671 | EXPORT_SYMBOL(ceph_monc_create_snapid); |
e56fa10e YS |
672 | |
673 | int ceph_monc_delete_snapid(struct ceph_mon_client *monc, | |
674 | u32 pool, u64 snapid) | |
675 | { | |
676 | return ceph_monc_do_poolop(monc, POOL_OP_CREATE_UNMANAGED_SNAP, | |
677 | pool, snapid, 0, 0); | |
678 | ||
679 | } | |
680 | ||
ba75bb98 | 681 | /* |
e56fa10e | 682 | * Resend pending generic requests. |
ba75bb98 | 683 | */ |
f8c76f6f | 684 | static void __resend_generic_request(struct ceph_mon_client *monc) |
ba75bb98 | 685 | { |
f8c76f6f | 686 | struct ceph_mon_generic_request *req; |
85ff03f6 | 687 | struct rb_node *p; |
ba75bb98 | 688 | |
f8c76f6f YS |
689 | for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) { |
690 | req = rb_entry(p, struct ceph_mon_generic_request, node); | |
6740a845 | 691 | ceph_msg_revoke(req->request); |
67130934 | 692 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
ba75bb98 SW |
693 | } |
694 | } | |
695 | ||
696 | /* | |
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. | |
700 | */ | |
701 | static void delayed_work(struct work_struct *work) | |
702 | { | |
703 | struct ceph_mon_client *monc = | |
704 | container_of(work, struct ceph_mon_client, delayed_work.work); | |
705 | ||
706 | dout("monc delayed_work\n"); | |
707 | mutex_lock(&monc->mutex); | |
4e7a5dcd SW |
708 | if (monc->hunting) { |
709 | __close_session(monc); | |
710 | __open_session(monc); /* continue hunting */ | |
ba75bb98 | 711 | } else { |
67130934 | 712 | ceph_con_keepalive(&monc->con); |
9bd2e6f8 SW |
713 | |
714 | __validate_auth(monc); | |
715 | ||
4e7a5dcd SW |
716 | if (monc->auth->ops->is_authenticated(monc->auth)) |
717 | __send_subscribe(monc); | |
ba75bb98 | 718 | } |
ba75bb98 SW |
719 | __schedule_delayed(monc); |
720 | mutex_unlock(&monc->mutex); | |
721 | } | |
722 | ||
6b805185 SW |
723 | /* |
724 | * On startup, we build a temporary monmap populated with the IPs | |
725 | * provided by mount(2). | |
726 | */ | |
727 | static int build_initial_monmap(struct ceph_mon_client *monc) | |
728 | { | |
3d14c5d2 YS |
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; | |
6b805185 SW |
732 | int i; |
733 | ||
734 | /* build initial monmap */ | |
735 | monc->monmap = kzalloc(sizeof(*monc->monmap) + | |
736 | num_mon*sizeof(monc->monmap->mon_inst[0]), | |
737 | GFP_KERNEL); | |
738 | if (!monc->monmap) | |
739 | return -ENOMEM; | |
740 | for (i = 0; i < num_mon; i++) { | |
741 | monc->monmap->mon_inst[i].addr = mon_addr[i]; | |
6b805185 SW |
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); | |
746 | } | |
747 | monc->monmap->num_mon = num_mon; | |
4e7a5dcd | 748 | monc->have_fsid = false; |
6b805185 SW |
749 | return 0; |
750 | } | |
751 | ||
ba75bb98 SW |
752 | int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl) |
753 | { | |
754 | int err = 0; | |
755 | ||
756 | dout("init\n"); | |
757 | memset(monc, 0, sizeof(*monc)); | |
758 | monc->client = cl; | |
759 | monc->monmap = NULL; | |
760 | mutex_init(&monc->mutex); | |
761 | ||
6b805185 SW |
762 | err = build_initial_monmap(monc); |
763 | if (err) | |
764 | goto out; | |
765 | ||
f6a2f5be | 766 | /* connection */ |
4e7a5dcd | 767 | /* authentication */ |
3d14c5d2 | 768 | monc->auth = ceph_auth_init(cl->options->name, |
8323c3aa | 769 | cl->options->key); |
49d9224c NW |
770 | if (IS_ERR(monc->auth)) { |
771 | err = PTR_ERR(monc->auth); | |
67130934 | 772 | goto out_monmap; |
49d9224c | 773 | } |
4e7a5dcd SW |
774 | monc->auth->want_keys = |
775 | CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON | | |
776 | CEPH_ENTITY_TYPE_OSD | CEPH_ENTITY_TYPE_MDS; | |
777 | ||
240ed68e | 778 | /* msgs */ |
a79832f2 | 779 | err = -ENOMEM; |
7c315c55 | 780 | monc->m_subscribe_ack = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE_ACK, |
34d23762 | 781 | sizeof(struct ceph_mon_subscribe_ack), |
b61c2763 | 782 | GFP_NOFS, true); |
a79832f2 | 783 | if (!monc->m_subscribe_ack) |
49d9224c | 784 | goto out_auth; |
6694d6b9 | 785 | |
b61c2763 SW |
786 | monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 96, GFP_NOFS, |
787 | true); | |
240ed68e SW |
788 | if (!monc->m_subscribe) |
789 | goto out_subscribe_ack; | |
790 | ||
b61c2763 SW |
791 | monc->m_auth_reply = ceph_msg_new(CEPH_MSG_AUTH_REPLY, 4096, GFP_NOFS, |
792 | true); | |
a79832f2 | 793 | if (!monc->m_auth_reply) |
240ed68e | 794 | goto out_subscribe; |
4e7a5dcd | 795 | |
b61c2763 | 796 | monc->m_auth = ceph_msg_new(CEPH_MSG_AUTH, 4096, GFP_NOFS, true); |
9bd2e6f8 | 797 | monc->pending_auth = 0; |
a79832f2 | 798 | if (!monc->m_auth) |
6694d6b9 | 799 | goto out_auth_reply; |
ba75bb98 SW |
800 | |
801 | monc->cur_mon = -1; | |
4e7a5dcd | 802 | monc->hunting = true; |
ba75bb98 SW |
803 | monc->sub_renew_after = jiffies; |
804 | monc->sub_sent = 0; | |
805 | ||
806 | INIT_DELAYED_WORK(&monc->delayed_work, delayed_work); | |
f8c76f6f YS |
807 | monc->generic_request_tree = RB_ROOT; |
808 | monc->num_generic_requests = 0; | |
ba75bb98 SW |
809 | monc->last_tid = 0; |
810 | ||
811 | monc->have_mdsmap = 0; | |
812 | monc->have_osdmap = 0; | |
813 | monc->want_next_osdmap = 1; | |
4e7a5dcd SW |
814 | return 0; |
815 | ||
6694d6b9 SW |
816 | out_auth_reply: |
817 | ceph_msg_put(monc->m_auth_reply); | |
240ed68e SW |
818 | out_subscribe: |
819 | ceph_msg_put(monc->m_subscribe); | |
7c315c55 SW |
820 | out_subscribe_ack: |
821 | ceph_msg_put(monc->m_subscribe_ack); | |
49d9224c NW |
822 | out_auth: |
823 | ceph_auth_destroy(monc->auth); | |
4e7a5dcd SW |
824 | out_monmap: |
825 | kfree(monc->monmap); | |
ba75bb98 SW |
826 | out: |
827 | return err; | |
828 | } | |
3d14c5d2 | 829 | EXPORT_SYMBOL(ceph_monc_init); |
ba75bb98 SW |
830 | |
831 | void ceph_monc_stop(struct ceph_mon_client *monc) | |
832 | { | |
833 | dout("stop\n"); | |
834 | cancel_delayed_work_sync(&monc->delayed_work); | |
835 | ||
836 | mutex_lock(&monc->mutex); | |
837 | __close_session(monc); | |
f6a2f5be | 838 | |
ba75bb98 SW |
839 | mutex_unlock(&monc->mutex); |
840 | ||
f3dea7ed SW |
841 | /* |
842 | * flush msgr queue before we destroy ourselves to ensure that: | |
843 | * - any work that references our embedded con is finished. | |
844 | * - any osd_client or other work that may reference an authorizer | |
845 | * finishes before we shut down the auth subsystem. | |
846 | */ | |
847 | ceph_msgr_flush(); | |
848 | ||
4e7a5dcd SW |
849 | ceph_auth_destroy(monc->auth); |
850 | ||
851 | ceph_msg_put(monc->m_auth); | |
6694d6b9 | 852 | ceph_msg_put(monc->m_auth_reply); |
240ed68e | 853 | ceph_msg_put(monc->m_subscribe); |
7c315c55 | 854 | ceph_msg_put(monc->m_subscribe_ack); |
ba75bb98 SW |
855 | |
856 | kfree(monc->monmap); | |
857 | } | |
3d14c5d2 | 858 | EXPORT_SYMBOL(ceph_monc_stop); |
ba75bb98 | 859 | |
4e7a5dcd SW |
860 | static void handle_auth_reply(struct ceph_mon_client *monc, |
861 | struct ceph_msg *msg) | |
862 | { | |
863 | int ret; | |
09c4d6a7 | 864 | int was_auth = 0; |
4e7a5dcd SW |
865 | |
866 | mutex_lock(&monc->mutex); | |
09c4d6a7 SW |
867 | if (monc->auth->ops) |
868 | was_auth = monc->auth->ops->is_authenticated(monc->auth); | |
9bd2e6f8 | 869 | monc->pending_auth = 0; |
4e7a5dcd SW |
870 | ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base, |
871 | msg->front.iov_len, | |
872 | monc->m_auth->front.iov_base, | |
873 | monc->m_auth->front_max); | |
874 | if (ret < 0) { | |
9bd2e6f8 | 875 | monc->client->auth_err = ret; |
03066f23 | 876 | wake_up_all(&monc->client->auth_wq); |
4e7a5dcd | 877 | } else if (ret > 0) { |
9bd2e6f8 | 878 | __send_prepared_auth_request(monc, ret); |
09c4d6a7 | 879 | } else if (!was_auth && monc->auth->ops->is_authenticated(monc->auth)) { |
4e7a5dcd | 880 | dout("authenticated, starting session\n"); |
0743304d | 881 | |
15d9882c AE |
882 | monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT; |
883 | monc->client->msgr.inst.name.num = | |
0cf5537b | 884 | cpu_to_le64(monc->auth->global_id); |
0743304d | 885 | |
4e7a5dcd | 886 | __send_subscribe(monc); |
f8c76f6f | 887 | __resend_generic_request(monc); |
4e7a5dcd SW |
888 | } |
889 | mutex_unlock(&monc->mutex); | |
890 | } | |
891 | ||
9bd2e6f8 SW |
892 | static int __validate_auth(struct ceph_mon_client *monc) |
893 | { | |
894 | int ret; | |
895 | ||
896 | if (monc->pending_auth) | |
897 | return 0; | |
898 | ||
899 | ret = ceph_build_auth(monc->auth, monc->m_auth->front.iov_base, | |
900 | monc->m_auth->front_max); | |
901 | if (ret <= 0) | |
902 | return ret; /* either an error, or no need to authenticate */ | |
903 | __send_prepared_auth_request(monc, ret); | |
904 | return 0; | |
905 | } | |
906 | ||
907 | int ceph_monc_validate_auth(struct ceph_mon_client *monc) | |
908 | { | |
909 | int ret; | |
910 | ||
911 | mutex_lock(&monc->mutex); | |
912 | ret = __validate_auth(monc); | |
913 | mutex_unlock(&monc->mutex); | |
914 | return ret; | |
915 | } | |
3d14c5d2 | 916 | EXPORT_SYMBOL(ceph_monc_validate_auth); |
9bd2e6f8 | 917 | |
ba75bb98 SW |
918 | /* |
919 | * handle incoming message | |
920 | */ | |
921 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
922 | { | |
923 | struct ceph_mon_client *monc = con->private; | |
924 | int type = le16_to_cpu(msg->hdr.type); | |
925 | ||
926 | if (!monc) | |
927 | return; | |
928 | ||
929 | switch (type) { | |
4e7a5dcd SW |
930 | case CEPH_MSG_AUTH_REPLY: |
931 | handle_auth_reply(monc, msg); | |
ba75bb98 SW |
932 | break; |
933 | ||
934 | case CEPH_MSG_MON_SUBSCRIBE_ACK: | |
935 | handle_subscribe_ack(monc, msg); | |
936 | break; | |
937 | ||
938 | case CEPH_MSG_STATFS_REPLY: | |
939 | handle_statfs_reply(monc, msg); | |
940 | break; | |
941 | ||
e56fa10e YS |
942 | case CEPH_MSG_POOLOP_REPLY: |
943 | handle_poolop_reply(monc, msg); | |
944 | break; | |
945 | ||
4e7a5dcd SW |
946 | case CEPH_MSG_MON_MAP: |
947 | ceph_monc_handle_map(monc, msg); | |
948 | break; | |
949 | ||
ba75bb98 SW |
950 | case CEPH_MSG_OSD_MAP: |
951 | ceph_osdc_handle_map(&monc->client->osdc, msg); | |
952 | break; | |
953 | ||
954 | default: | |
3d14c5d2 YS |
955 | /* can the chained handler handle it? */ |
956 | if (monc->client->extra_mon_dispatch && | |
957 | monc->client->extra_mon_dispatch(monc->client, msg) == 0) | |
958 | break; | |
959 | ||
ba75bb98 SW |
960 | pr_err("received unknown message type %d %s\n", type, |
961 | ceph_msg_type_name(type)); | |
962 | } | |
963 | ceph_msg_put(msg); | |
964 | } | |
965 | ||
966 | /* | |
967 | * Allocate memory for incoming message | |
968 | */ | |
969 | static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, | |
2450418c YS |
970 | struct ceph_msg_header *hdr, |
971 | int *skip) | |
ba75bb98 SW |
972 | { |
973 | struct ceph_mon_client *monc = con->private; | |
974 | int type = le16_to_cpu(hdr->type); | |
2450418c | 975 | int front_len = le32_to_cpu(hdr->front_len); |
5b3a4db3 | 976 | struct ceph_msg *m = NULL; |
ba75bb98 | 977 | |
2450418c | 978 | *skip = 0; |
0547a9b3 | 979 | |
ba75bb98 | 980 | switch (type) { |
ba75bb98 | 981 | case CEPH_MSG_MON_SUBSCRIBE_ACK: |
7c315c55 | 982 | m = ceph_msg_get(monc->m_subscribe_ack); |
2450418c | 983 | break; |
e56fa10e | 984 | case CEPH_MSG_POOLOP_REPLY: |
ba75bb98 | 985 | case CEPH_MSG_STATFS_REPLY: |
f8c76f6f | 986 | return get_generic_reply(con, hdr, skip); |
4e7a5dcd | 987 | case CEPH_MSG_AUTH_REPLY: |
6694d6b9 | 988 | m = ceph_msg_get(monc->m_auth_reply); |
2450418c | 989 | break; |
5b3a4db3 SW |
990 | case CEPH_MSG_MON_MAP: |
991 | case CEPH_MSG_MDS_MAP: | |
992 | case CEPH_MSG_OSD_MAP: | |
b61c2763 | 993 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); |
1c20f2d2 AE |
994 | if (!m) |
995 | return NULL; /* ENOMEM--return skip == 0 */ | |
5b3a4db3 | 996 | break; |
ba75bb98 | 997 | } |
2450418c | 998 | |
5b3a4db3 SW |
999 | if (!m) { |
1000 | pr_info("alloc_msg unknown type %d\n", type); | |
2450418c | 1001 | *skip = 1; |
5b3a4db3 | 1002 | } |
2450418c | 1003 | return m; |
ba75bb98 SW |
1004 | } |
1005 | ||
1006 | /* | |
1007 | * If the monitor connection resets, pick a new monitor and resubmit | |
1008 | * any pending requests. | |
1009 | */ | |
1010 | static void mon_fault(struct ceph_connection *con) | |
1011 | { | |
1012 | struct ceph_mon_client *monc = con->private; | |
1013 | ||
1014 | if (!monc) | |
1015 | return; | |
1016 | ||
1017 | dout("mon_fault\n"); | |
1018 | mutex_lock(&monc->mutex); | |
1019 | if (!con->private) | |
1020 | goto out; | |
1021 | ||
f6a2f5be | 1022 | if (!monc->hunting) |
ba75bb98 SW |
1023 | pr_info("mon%d %s session lost, " |
1024 | "hunting for new mon\n", monc->cur_mon, | |
67130934 | 1025 | ceph_pr_addr(&monc->con.peer_addr.in_addr)); |
ba75bb98 SW |
1026 | |
1027 | __close_session(monc); | |
1028 | if (!monc->hunting) { | |
1029 | /* start hunting */ | |
1030 | monc->hunting = true; | |
4e7a5dcd | 1031 | __open_session(monc); |
ba75bb98 SW |
1032 | } else { |
1033 | /* already hunting, let's wait a bit */ | |
1034 | __schedule_delayed(monc); | |
1035 | } | |
1036 | out: | |
1037 | mutex_unlock(&monc->mutex); | |
1038 | } | |
1039 | ||
ec87ef43 SW |
1040 | /* |
1041 | * We can ignore refcounting on the connection struct, as all references | |
1042 | * will come from the messenger workqueue, which is drained prior to | |
1043 | * mon_client destruction. | |
1044 | */ | |
1045 | static struct ceph_connection *con_get(struct ceph_connection *con) | |
1046 | { | |
1047 | return con; | |
1048 | } | |
1049 | ||
1050 | static void con_put(struct ceph_connection *con) | |
1051 | { | |
1052 | } | |
1053 | ||
9e32789f | 1054 | static const struct ceph_connection_operations mon_con_ops = { |
ec87ef43 SW |
1055 | .get = con_get, |
1056 | .put = con_put, | |
ba75bb98 SW |
1057 | .dispatch = dispatch, |
1058 | .fault = mon_fault, | |
1059 | .alloc_msg = mon_alloc_msg, | |
ba75bb98 | 1060 | }; |