Commit | Line | Data |
---|---|---|
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); |
4f471e4a SW |
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); | |
67130934 | 124 | ceph_con_close(&monc->con); |
f6a2f5be SW |
125 | monc->cur_mon = -1; |
126 | monc->pending_auth = 0; | |
127 | ceph_auth_reset(monc->auth); | |
ba75bb98 SW |
128 | } |
129 | ||
130 | /* | |
131 | * Open a session with a (new) monitor. | |
132 | */ | |
133 | static int __open_session(struct ceph_mon_client *monc) | |
134 | { | |
135 | char r; | |
4e7a5dcd | 136 | int ret; |
ba75bb98 SW |
137 | |
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); | |
143 | monc->sub_sent = 0; | |
144 | monc->sub_renew_after = jiffies; /* i.e., expired */ | |
145 | monc->want_next_osdmap = !!monc->want_next_osdmap; | |
146 | ||
20581c1f | 147 | dout("open_session mon%d opening\n", monc->cur_mon); |
67130934 | 148 | ceph_con_open(&monc->con, |
b7a9e5dd | 149 | CEPH_ENTITY_TYPE_MON, monc->cur_mon, |
ba75bb98 | 150 | &monc->monmap->mon_inst[monc->cur_mon].addr); |
4e7a5dcd SW |
151 | |
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); | |
5ce6e9db | 156 | __send_prepared_auth_request(monc, ret); |
ba75bb98 SW |
157 | } else { |
158 | dout("open_session mon%d already open\n", monc->cur_mon); | |
159 | } | |
160 | return 0; | |
161 | } | |
162 | ||
163 | static bool __sub_expired(struct ceph_mon_client *monc) | |
164 | { | |
165 | return time_after_eq(jiffies, monc->sub_renew_after); | |
166 | } | |
167 | ||
168 | /* | |
169 | * Reschedule delayed work timer. | |
170 | */ | |
171 | static void __schedule_delayed(struct ceph_mon_client *monc) | |
172 | { | |
95c96174 | 173 | unsigned int delay; |
ba75bb98 | 174 | |
4e7a5dcd | 175 | if (monc->cur_mon < 0 || __sub_expired(monc)) |
ba75bb98 SW |
176 | delay = 10 * HZ; |
177 | else | |
178 | delay = 20 * HZ; | |
179 | dout("__schedule_delayed after %u\n", delay); | |
180 | schedule_delayed_work(&monc->delayed_work, delay); | |
181 | } | |
182 | ||
183 | /* | |
184 | * Send subscribe request for mdsmap and/or osdmap. | |
185 | */ | |
186 | static void __send_subscribe(struct ceph_mon_client *monc) | |
187 | { | |
188 | dout("__send_subscribe sub_sent=%u exp=%u want_osd=%d\n", | |
95c96174 | 189 | (unsigned int)monc->sub_sent, __sub_expired(monc), |
ba75bb98 SW |
190 | monc->want_next_osdmap); |
191 | if ((__sub_expired(monc) && !monc->sub_sent) || | |
192 | monc->want_next_osdmap == 1) { | |
240ed68e | 193 | struct ceph_msg *msg = monc->m_subscribe; |
ba75bb98 SW |
194 | struct ceph_mon_subscribe_item *i; |
195 | void *p, *end; | |
3d14c5d2 | 196 | int num; |
ba75bb98 | 197 | |
ba75bb98 | 198 | p = msg->front.iov_base; |
240ed68e | 199 | end = p + msg->front_max; |
ba75bb98 | 200 | |
3d14c5d2 YS |
201 | num = 1 + !!monc->want_next_osdmap + !!monc->want_mdsmap; |
202 | ceph_encode_32(&p, num); | |
203 | ||
ba75bb98 SW |
204 | if (monc->want_next_osdmap) { |
205 | dout("__send_subscribe to 'osdmap' %u\n", | |
95c96174 | 206 | (unsigned int)monc->have_osdmap); |
ba75bb98 SW |
207 | ceph_encode_string(&p, end, "osdmap", 6); |
208 | i = p; | |
209 | i->have = cpu_to_le64(monc->have_osdmap); | |
210 | i->onetime = 1; | |
211 | p += sizeof(*i); | |
212 | monc->want_next_osdmap = 2; /* requested */ | |
ba75bb98 | 213 | } |
3d14c5d2 YS |
214 | if (monc->want_mdsmap) { |
215 | dout("__send_subscribe to 'mdsmap' %u+\n", | |
95c96174 | 216 | (unsigned int)monc->have_mdsmap); |
3d14c5d2 YS |
217 | ceph_encode_string(&p, end, "mdsmap", 6); |
218 | i = p; | |
219 | i->have = cpu_to_le64(monc->have_mdsmap); | |
220 | i->onetime = 0; | |
221 | p += sizeof(*i); | |
222 | } | |
4e7a5dcd SW |
223 | ceph_encode_string(&p, end, "monmap", 6); |
224 | i = p; | |
225 | i->have = 0; | |
226 | i->onetime = 0; | |
227 | p += sizeof(*i); | |
ba75bb98 SW |
228 | |
229 | msg->front.iov_len = p - msg->front.iov_base; | |
230 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
6740a845 | 231 | ceph_msg_revoke(msg); |
67130934 | 232 | ceph_con_send(&monc->con, ceph_msg_get(msg)); |
ba75bb98 SW |
233 | |
234 | monc->sub_sent = jiffies | 1; /* never 0 */ | |
235 | } | |
236 | } | |
237 | ||
238 | static void handle_subscribe_ack(struct ceph_mon_client *monc, | |
239 | struct ceph_msg *msg) | |
240 | { | |
95c96174 | 241 | unsigned int seconds; |
07bd10fb SW |
242 | struct ceph_mon_subscribe_ack *h = msg->front.iov_base; |
243 | ||
244 | if (msg->front.iov_len < sizeof(*h)) | |
245 | goto bad; | |
246 | seconds = le32_to_cpu(h->duration); | |
ba75bb98 | 247 | |
ba75bb98 SW |
248 | mutex_lock(&monc->mutex); |
249 | if (monc->hunting) { | |
250 | pr_info("mon%d %s session established\n", | |
3d14c5d2 | 251 | monc->cur_mon, |
67130934 | 252 | ceph_pr_addr(&monc->con.peer_addr.in_addr)); |
ba75bb98 SW |
253 | monc->hunting = false; |
254 | } | |
255 | dout("handle_subscribe_ack after %d seconds\n", seconds); | |
0656d11b | 256 | monc->sub_renew_after = monc->sub_sent + (seconds >> 1)*HZ - 1; |
ba75bb98 SW |
257 | monc->sub_sent = 0; |
258 | mutex_unlock(&monc->mutex); | |
259 | return; | |
260 | bad: | |
261 | pr_err("got corrupt subscribe-ack msg\n"); | |
9ec7cab1 | 262 | ceph_msg_dump(msg); |
ba75bb98 SW |
263 | } |
264 | ||
265 | /* | |
266 | * Keep track of which maps we have | |
267 | */ | |
268 | int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 got) | |
269 | { | |
270 | mutex_lock(&monc->mutex); | |
271 | monc->have_mdsmap = got; | |
272 | mutex_unlock(&monc->mutex); | |
273 | return 0; | |
274 | } | |
3d14c5d2 | 275 | EXPORT_SYMBOL(ceph_monc_got_mdsmap); |
ba75bb98 SW |
276 | |
277 | int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 got) | |
278 | { | |
279 | mutex_lock(&monc->mutex); | |
280 | monc->have_osdmap = got; | |
281 | monc->want_next_osdmap = 0; | |
282 | mutex_unlock(&monc->mutex); | |
283 | return 0; | |
284 | } | |
285 | ||
286 | /* | |
287 | * Register interest in the next osdmap | |
288 | */ | |
289 | void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc) | |
290 | { | |
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); | |
298 | } | |
299 | ||
4e7a5dcd | 300 | /* |
50b885b9 | 301 | * |
4e7a5dcd SW |
302 | */ |
303 | int ceph_monc_open_session(struct ceph_mon_client *monc) | |
ba75bb98 | 304 | { |
ba75bb98 | 305 | mutex_lock(&monc->mutex); |
4e7a5dcd | 306 | __open_session(monc); |
ba75bb98 SW |
307 | __schedule_delayed(monc); |
308 | mutex_unlock(&monc->mutex); | |
309 | return 0; | |
310 | } | |
3d14c5d2 | 311 | EXPORT_SYMBOL(ceph_monc_open_session); |
ba75bb98 | 312 | |
4e7a5dcd SW |
313 | /* |
314 | * The monitor responds with mount ack indicate mount success. The | |
315 | * included client ticket allows the client to talk to MDSs and OSDs. | |
316 | */ | |
0743304d SW |
317 | static void ceph_monc_handle_map(struct ceph_mon_client *monc, |
318 | struct ceph_msg *msg) | |
4e7a5dcd SW |
319 | { |
320 | struct ceph_client *client = monc->client; | |
321 | struct ceph_monmap *monmap = NULL, *old = monc->monmap; | |
322 | void *p, *end; | |
323 | ||
324 | mutex_lock(&monc->mutex); | |
325 | ||
326 | dout("handle_monmap\n"); | |
327 | p = msg->front.iov_base; | |
328 | end = p + msg->front.iov_len; | |
329 | ||
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)); | |
d4a780ce | 334 | goto out; |
4e7a5dcd | 335 | } |
0743304d SW |
336 | |
337 | if (ceph_check_fsid(monc->client, &monmap->fsid) < 0) { | |
4e7a5dcd | 338 | kfree(monmap); |
d4a780ce | 339 | goto out; |
4e7a5dcd SW |
340 | } |
341 | ||
342 | client->monc.monmap = monmap; | |
4e7a5dcd SW |
343 | kfree(old); |
344 | ||
ab434b60 SW |
345 | if (!client->have_fsid) { |
346 | client->have_fsid = true; | |
347 | mutex_unlock(&monc->mutex); | |
348 | /* | |
349 | * do debugfs initialization without mutex to avoid | |
350 | * creating a locking dependency | |
351 | */ | |
352 | ceph_debugfs_client_init(client); | |
353 | goto out_unlocked; | |
354 | } | |
d4a780ce | 355 | out: |
4e7a5dcd | 356 | mutex_unlock(&monc->mutex); |
ab434b60 | 357 | out_unlocked: |
03066f23 | 358 | wake_up_all(&client->auth_wq); |
4e7a5dcd SW |
359 | } |
360 | ||
ba75bb98 | 361 | /* |
e56fa10e | 362 | * generic requests (e.g., statfs, poolop) |
ba75bb98 | 363 | */ |
f8c76f6f | 364 | static struct ceph_mon_generic_request *__lookup_generic_req( |
85ff03f6 SW |
365 | struct ceph_mon_client *monc, u64 tid) |
366 | { | |
f8c76f6f YS |
367 | struct ceph_mon_generic_request *req; |
368 | struct rb_node *n = monc->generic_request_tree.rb_node; | |
85ff03f6 SW |
369 | |
370 | while (n) { | |
f8c76f6f | 371 | req = rb_entry(n, struct ceph_mon_generic_request, node); |
85ff03f6 SW |
372 | if (tid < req->tid) |
373 | n = n->rb_left; | |
374 | else if (tid > req->tid) | |
375 | n = n->rb_right; | |
376 | else | |
377 | return req; | |
378 | } | |
379 | return NULL; | |
380 | } | |
381 | ||
f8c76f6f YS |
382 | static void __insert_generic_request(struct ceph_mon_client *monc, |
383 | struct ceph_mon_generic_request *new) | |
85ff03f6 | 384 | { |
f8c76f6f | 385 | struct rb_node **p = &monc->generic_request_tree.rb_node; |
85ff03f6 | 386 | struct rb_node *parent = NULL; |
f8c76f6f | 387 | struct ceph_mon_generic_request *req = NULL; |
85ff03f6 SW |
388 | |
389 | while (*p) { | |
390 | parent = *p; | |
f8c76f6f | 391 | req = rb_entry(parent, struct ceph_mon_generic_request, node); |
85ff03f6 SW |
392 | if (new->tid < req->tid) |
393 | p = &(*p)->rb_left; | |
394 | else if (new->tid > req->tid) | |
395 | p = &(*p)->rb_right; | |
396 | else | |
397 | BUG(); | |
398 | } | |
399 | ||
400 | rb_link_node(&new->node, parent, p); | |
f8c76f6f | 401 | rb_insert_color(&new->node, &monc->generic_request_tree); |
85ff03f6 SW |
402 | } |
403 | ||
f8c76f6f | 404 | static void release_generic_request(struct kref *kref) |
3143edd3 | 405 | { |
f8c76f6f YS |
406 | struct ceph_mon_generic_request *req = |
407 | container_of(kref, struct ceph_mon_generic_request, kref); | |
3143edd3 SW |
408 | |
409 | if (req->reply) | |
410 | ceph_msg_put(req->reply); | |
411 | if (req->request) | |
412 | ceph_msg_put(req->request); | |
20547567 YS |
413 | |
414 | kfree(req); | |
3143edd3 SW |
415 | } |
416 | ||
f8c76f6f | 417 | static void put_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 | 418 | { |
f8c76f6f | 419 | kref_put(&req->kref, release_generic_request); |
3143edd3 SW |
420 | } |
421 | ||
f8c76f6f | 422 | static void get_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 SW |
423 | { |
424 | kref_get(&req->kref); | |
425 | } | |
426 | ||
f8c76f6f | 427 | static struct ceph_msg *get_generic_reply(struct ceph_connection *con, |
3143edd3 SW |
428 | struct ceph_msg_header *hdr, |
429 | int *skip) | |
430 | { | |
431 | struct ceph_mon_client *monc = con->private; | |
f8c76f6f | 432 | struct ceph_mon_generic_request *req; |
3143edd3 SW |
433 | u64 tid = le64_to_cpu(hdr->tid); |
434 | struct ceph_msg *m; | |
435 | ||
436 | mutex_lock(&monc->mutex); | |
f8c76f6f | 437 | req = __lookup_generic_req(monc, tid); |
3143edd3 | 438 | if (!req) { |
f8c76f6f | 439 | dout("get_generic_reply %lld dne\n", tid); |
3143edd3 SW |
440 | *skip = 1; |
441 | m = NULL; | |
442 | } else { | |
f8c76f6f | 443 | dout("get_generic_reply %lld got %p\n", tid, req->reply); |
1c20f2d2 | 444 | *skip = 0; |
3143edd3 SW |
445 | m = ceph_msg_get(req->reply); |
446 | /* | |
447 | * we don't need to track the connection reading into | |
448 | * this reply because we only have one open connection | |
449 | * at a time, ever. | |
450 | */ | |
451 | } | |
452 | mutex_unlock(&monc->mutex); | |
453 | return m; | |
454 | } | |
455 | ||
e56fa10e YS |
456 | static int do_generic_request(struct ceph_mon_client *monc, |
457 | struct ceph_mon_generic_request *req) | |
458 | { | |
459 | int err; | |
460 | ||
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++; | |
67130934 | 467 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
e56fa10e YS |
468 | mutex_unlock(&monc->mutex); |
469 | ||
470 | err = wait_for_completion_interruptible(&req->completion); | |
471 | ||
472 | mutex_lock(&monc->mutex); | |
473 | rb_erase(&req->node, &monc->generic_request_tree); | |
474 | monc->num_generic_requests--; | |
475 | mutex_unlock(&monc->mutex); | |
476 | ||
477 | if (!err) | |
478 | err = req->result; | |
479 | return err; | |
480 | } | |
481 | ||
482 | /* | |
483 | * statfs | |
484 | */ | |
ba75bb98 SW |
485 | static void handle_statfs_reply(struct ceph_mon_client *monc, |
486 | struct ceph_msg *msg) | |
487 | { | |
f8c76f6f | 488 | struct ceph_mon_generic_request *req; |
ba75bb98 | 489 | struct ceph_mon_statfs_reply *reply = msg->front.iov_base; |
3143edd3 | 490 | u64 tid = le64_to_cpu(msg->hdr.tid); |
ba75bb98 SW |
491 | |
492 | if (msg->front.iov_len != sizeof(*reply)) | |
493 | goto bad; | |
ba75bb98 SW |
494 | dout("handle_statfs_reply %p tid %llu\n", msg, tid); |
495 | ||
496 | mutex_lock(&monc->mutex); | |
f8c76f6f | 497 | req = __lookup_generic_req(monc, tid); |
ba75bb98 | 498 | if (req) { |
f8c76f6f | 499 | *(struct ceph_statfs *)req->buf = reply->st; |
ba75bb98 | 500 | req->result = 0; |
f8c76f6f | 501 | get_generic_request(req); |
ba75bb98 SW |
502 | } |
503 | mutex_unlock(&monc->mutex); | |
3143edd3 | 504 | if (req) { |
03066f23 | 505 | complete_all(&req->completion); |
f8c76f6f | 506 | put_generic_request(req); |
3143edd3 | 507 | } |
ba75bb98 SW |
508 | return; |
509 | ||
510 | bad: | |
e56fa10e | 511 | pr_err("corrupt generic reply, tid %llu\n", tid); |
9ec7cab1 | 512 | ceph_msg_dump(msg); |
ba75bb98 SW |
513 | } |
514 | ||
515 | /* | |
3143edd3 | 516 | * Do a synchronous statfs(). |
ba75bb98 | 517 | */ |
3143edd3 | 518 | int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf) |
ba75bb98 | 519 | { |
f8c76f6f | 520 | struct ceph_mon_generic_request *req; |
ba75bb98 | 521 | struct ceph_mon_statfs *h; |
3143edd3 SW |
522 | int err; |
523 | ||
cffe7b6d | 524 | req = kzalloc(sizeof(*req), GFP_NOFS); |
3143edd3 SW |
525 | if (!req) |
526 | return -ENOMEM; | |
527 | ||
3143edd3 SW |
528 | kref_init(&req->kref); |
529 | req->buf = buf; | |
e56fa10e | 530 | req->buf_len = sizeof(*buf); |
3143edd3 | 531 | init_completion(&req->completion); |
ba75bb98 | 532 | |
a79832f2 | 533 | err = -ENOMEM; |
b61c2763 SW |
534 | req->request = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), GFP_NOFS, |
535 | true); | |
a79832f2 | 536 | if (!req->request) |
3143edd3 | 537 | goto out; |
b61c2763 SW |
538 | req->reply = ceph_msg_new(CEPH_MSG_STATFS_REPLY, 1024, GFP_NOFS, |
539 | true); | |
a79832f2 | 540 | if (!req->reply) |
3143edd3 | 541 | goto out; |
3143edd3 SW |
542 | |
543 | /* fill out request */ | |
544 | h = req->request->front.iov_base; | |
13e38c8a SW |
545 | h->monhdr.have_version = 0; |
546 | h->monhdr.session_mon = cpu_to_le16(-1); | |
547 | h->monhdr.session_mon_tid = 0; | |
ba75bb98 | 548 | h->fsid = monc->monmap->fsid; |
ba75bb98 | 549 | |
e56fa10e | 550 | err = do_generic_request(monc, req); |
ba75bb98 | 551 | |
e56fa10e YS |
552 | out: |
553 | kref_put(&req->kref, release_generic_request); | |
554 | return err; | |
555 | } | |
3d14c5d2 | 556 | EXPORT_SYMBOL(ceph_monc_do_statfs); |
e56fa10e YS |
557 | |
558 | /* | |
559 | * pool ops | |
560 | */ | |
561 | static int get_poolop_reply_buf(const char *src, size_t src_len, | |
562 | char *dst, size_t dst_len) | |
563 | { | |
564 | u32 buf_len; | |
565 | ||
566 | if (src_len != sizeof(u32) + dst_len) | |
567 | return -EINVAL; | |
568 | ||
569 | buf_len = le32_to_cpu(*(u32 *)src); | |
570 | if (buf_len != dst_len) | |
571 | return -EINVAL; | |
572 | ||
573 | memcpy(dst, src + sizeof(u32), dst_len); | |
574 | return 0; | |
575 | } | |
576 | ||
577 | static void handle_poolop_reply(struct ceph_mon_client *monc, | |
578 | struct ceph_msg *msg) | |
579 | { | |
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); | |
583 | ||
584 | if (msg->front.iov_len < sizeof(*reply)) | |
585 | goto bad; | |
586 | dout("handle_poolop_reply %p tid %llu\n", msg, tid); | |
ba75bb98 SW |
587 | |
588 | mutex_lock(&monc->mutex); | |
e56fa10e YS |
589 | req = __lookup_generic_req(monc, tid); |
590 | if (req) { | |
591 | if (req->buf_len && | |
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); | |
596 | goto bad; | |
597 | } | |
598 | req->result = le32_to_cpu(reply->reply_code); | |
599 | get_generic_request(req); | |
600 | } | |
ba75bb98 | 601 | mutex_unlock(&monc->mutex); |
e56fa10e YS |
602 | if (req) { |
603 | complete(&req->completion); | |
604 | put_generic_request(req); | |
605 | } | |
606 | return; | |
ba75bb98 | 607 | |
e56fa10e YS |
608 | bad: |
609 | pr_err("corrupt generic reply, tid %llu\n", tid); | |
610 | ceph_msg_dump(msg); | |
611 | } | |
612 | ||
613 | /* | |
614 | * Do a synchronous pool op. | |
615 | */ | |
616 | int ceph_monc_do_poolop(struct ceph_mon_client *monc, u32 op, | |
617 | u32 pool, u64 snapid, | |
618 | char *buf, int len) | |
619 | { | |
620 | struct ceph_mon_generic_request *req; | |
621 | struct ceph_mon_poolop *h; | |
622 | int err; | |
623 | ||
624 | req = kzalloc(sizeof(*req), GFP_NOFS); | |
625 | if (!req) | |
626 | return -ENOMEM; | |
627 | ||
628 | kref_init(&req->kref); | |
629 | req->buf = buf; | |
630 | req->buf_len = len; | |
631 | init_completion(&req->completion); | |
632 | ||
633 | err = -ENOMEM; | |
b61c2763 SW |
634 | req->request = ceph_msg_new(CEPH_MSG_POOLOP, sizeof(*h), GFP_NOFS, |
635 | true); | |
e56fa10e YS |
636 | if (!req->request) |
637 | goto out; | |
b61c2763 SW |
638 | req->reply = ceph_msg_new(CEPH_MSG_POOLOP_REPLY, 1024, GFP_NOFS, |
639 | true); | |
e56fa10e YS |
640 | if (!req->reply) |
641 | goto out; | |
642 | ||
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); | |
652 | h->auid = 0; | |
653 | h->snapid = cpu_to_le64(snapid); | |
654 | h->name_len = 0; | |
655 | ||
656 | err = do_generic_request(monc, req); | |
3143edd3 SW |
657 | |
658 | out: | |
f8c76f6f | 659 | kref_put(&req->kref, release_generic_request); |
ba75bb98 SW |
660 | return err; |
661 | } | |
662 | ||
e56fa10e YS |
663 | int ceph_monc_create_snapid(struct ceph_mon_client *monc, |
664 | u32 pool, u64 *snapid) | |
665 | { | |
666 | return ceph_monc_do_poolop(monc, POOL_OP_CREATE_UNMANAGED_SNAP, | |
667 | pool, 0, (char *)snapid, sizeof(*snapid)); | |
668 | ||
669 | } | |
3d14c5d2 | 670 | EXPORT_SYMBOL(ceph_monc_create_snapid); |
e56fa10e YS |
671 | |
672 | int ceph_monc_delete_snapid(struct ceph_mon_client *monc, | |
673 | u32 pool, u64 snapid) | |
674 | { | |
675 | return ceph_monc_do_poolop(monc, POOL_OP_CREATE_UNMANAGED_SNAP, | |
676 | pool, snapid, 0, 0); | |
677 | ||
678 | } | |
679 | ||
ba75bb98 | 680 | /* |
e56fa10e | 681 | * Resend pending generic requests. |
ba75bb98 | 682 | */ |
f8c76f6f | 683 | static void __resend_generic_request(struct ceph_mon_client *monc) |
ba75bb98 | 684 | { |
f8c76f6f | 685 | struct ceph_mon_generic_request *req; |
85ff03f6 | 686 | struct rb_node *p; |
ba75bb98 | 687 | |
f8c76f6f YS |
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); | |
6740a845 | 690 | ceph_msg_revoke(req->request); |
4f471e4a | 691 | ceph_msg_revoke_incoming(req->reply); |
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 | 800 | |
735a72ef SW |
801 | ceph_con_init(&monc->con, monc, &mon_con_ops, |
802 | &monc->client->msgr); | |
803 | ||
ba75bb98 | 804 | monc->cur_mon = -1; |
4e7a5dcd | 805 | monc->hunting = true; |
ba75bb98 SW |
806 | monc->sub_renew_after = jiffies; |
807 | monc->sub_sent = 0; | |
808 | ||
809 | INIT_DELAYED_WORK(&monc->delayed_work, delayed_work); | |
f8c76f6f YS |
810 | monc->generic_request_tree = RB_ROOT; |
811 | monc->num_generic_requests = 0; | |
ba75bb98 SW |
812 | monc->last_tid = 0; |
813 | ||
814 | monc->have_mdsmap = 0; | |
815 | monc->have_osdmap = 0; | |
816 | monc->want_next_osdmap = 1; | |
4e7a5dcd SW |
817 | return 0; |
818 | ||
6694d6b9 SW |
819 | out_auth_reply: |
820 | ceph_msg_put(monc->m_auth_reply); | |
240ed68e SW |
821 | out_subscribe: |
822 | ceph_msg_put(monc->m_subscribe); | |
7c315c55 SW |
823 | out_subscribe_ack: |
824 | ceph_msg_put(monc->m_subscribe_ack); | |
49d9224c NW |
825 | out_auth: |
826 | ceph_auth_destroy(monc->auth); | |
4e7a5dcd SW |
827 | out_monmap: |
828 | kfree(monc->monmap); | |
ba75bb98 SW |
829 | out: |
830 | return err; | |
831 | } | |
3d14c5d2 | 832 | EXPORT_SYMBOL(ceph_monc_init); |
ba75bb98 SW |
833 | |
834 | void ceph_monc_stop(struct ceph_mon_client *monc) | |
835 | { | |
836 | dout("stop\n"); | |
837 | cancel_delayed_work_sync(&monc->delayed_work); | |
838 | ||
839 | mutex_lock(&monc->mutex); | |
840 | __close_session(monc); | |
f6a2f5be | 841 | |
ba75bb98 SW |
842 | mutex_unlock(&monc->mutex); |
843 | ||
f3dea7ed SW |
844 | /* |
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. | |
849 | */ | |
850 | ceph_msgr_flush(); | |
851 | ||
4e7a5dcd SW |
852 | ceph_auth_destroy(monc->auth); |
853 | ||
854 | ceph_msg_put(monc->m_auth); | |
6694d6b9 | 855 | ceph_msg_put(monc->m_auth_reply); |
240ed68e | 856 | ceph_msg_put(monc->m_subscribe); |
7c315c55 | 857 | ceph_msg_put(monc->m_subscribe_ack); |
ba75bb98 SW |
858 | |
859 | kfree(monc->monmap); | |
860 | } | |
3d14c5d2 | 861 | EXPORT_SYMBOL(ceph_monc_stop); |
ba75bb98 | 862 | |
4e7a5dcd SW |
863 | static void handle_auth_reply(struct ceph_mon_client *monc, |
864 | struct ceph_msg *msg) | |
865 | { | |
866 | int ret; | |
09c4d6a7 | 867 | int was_auth = 0; |
4e7a5dcd SW |
868 | |
869 | mutex_lock(&monc->mutex); | |
09c4d6a7 SW |
870 | if (monc->auth->ops) |
871 | was_auth = monc->auth->ops->is_authenticated(monc->auth); | |
9bd2e6f8 | 872 | monc->pending_auth = 0; |
4e7a5dcd SW |
873 | ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base, |
874 | msg->front.iov_len, | |
875 | monc->m_auth->front.iov_base, | |
876 | monc->m_auth->front_max); | |
877 | if (ret < 0) { | |
9bd2e6f8 | 878 | monc->client->auth_err = ret; |
03066f23 | 879 | wake_up_all(&monc->client->auth_wq); |
4e7a5dcd | 880 | } else if (ret > 0) { |
9bd2e6f8 | 881 | __send_prepared_auth_request(monc, ret); |
09c4d6a7 | 882 | } else if (!was_auth && monc->auth->ops->is_authenticated(monc->auth)) { |
4e7a5dcd | 883 | dout("authenticated, starting session\n"); |
0743304d | 884 | |
15d9882c AE |
885 | monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT; |
886 | monc->client->msgr.inst.name.num = | |
0cf5537b | 887 | cpu_to_le64(monc->auth->global_id); |
0743304d | 888 | |
4e7a5dcd | 889 | __send_subscribe(monc); |
f8c76f6f | 890 | __resend_generic_request(monc); |
4e7a5dcd SW |
891 | } |
892 | mutex_unlock(&monc->mutex); | |
893 | } | |
894 | ||
9bd2e6f8 SW |
895 | static int __validate_auth(struct ceph_mon_client *monc) |
896 | { | |
897 | int ret; | |
898 | ||
899 | if (monc->pending_auth) | |
900 | return 0; | |
901 | ||
902 | ret = ceph_build_auth(monc->auth, monc->m_auth->front.iov_base, | |
903 | monc->m_auth->front_max); | |
904 | if (ret <= 0) | |
905 | return ret; /* either an error, or no need to authenticate */ | |
906 | __send_prepared_auth_request(monc, ret); | |
907 | return 0; | |
908 | } | |
909 | ||
910 | int ceph_monc_validate_auth(struct ceph_mon_client *monc) | |
911 | { | |
912 | int ret; | |
913 | ||
914 | mutex_lock(&monc->mutex); | |
915 | ret = __validate_auth(monc); | |
916 | mutex_unlock(&monc->mutex); | |
917 | return ret; | |
918 | } | |
3d14c5d2 | 919 | EXPORT_SYMBOL(ceph_monc_validate_auth); |
9bd2e6f8 | 920 | |
ba75bb98 SW |
921 | /* |
922 | * handle incoming message | |
923 | */ | |
924 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
925 | { | |
926 | struct ceph_mon_client *monc = con->private; | |
927 | int type = le16_to_cpu(msg->hdr.type); | |
928 | ||
929 | if (!monc) | |
930 | return; | |
931 | ||
932 | switch (type) { | |
4e7a5dcd SW |
933 | case CEPH_MSG_AUTH_REPLY: |
934 | handle_auth_reply(monc, msg); | |
ba75bb98 SW |
935 | break; |
936 | ||
937 | case CEPH_MSG_MON_SUBSCRIBE_ACK: | |
938 | handle_subscribe_ack(monc, msg); | |
939 | break; | |
940 | ||
941 | case CEPH_MSG_STATFS_REPLY: | |
942 | handle_statfs_reply(monc, msg); | |
943 | break; | |
944 | ||
e56fa10e YS |
945 | case CEPH_MSG_POOLOP_REPLY: |
946 | handle_poolop_reply(monc, msg); | |
947 | break; | |
948 | ||
4e7a5dcd SW |
949 | case CEPH_MSG_MON_MAP: |
950 | ceph_monc_handle_map(monc, msg); | |
951 | break; | |
952 | ||
ba75bb98 SW |
953 | case CEPH_MSG_OSD_MAP: |
954 | ceph_osdc_handle_map(&monc->client->osdc, msg); | |
955 | break; | |
956 | ||
957 | default: | |
3d14c5d2 YS |
958 | /* can the chained handler handle it? */ |
959 | if (monc->client->extra_mon_dispatch && | |
960 | monc->client->extra_mon_dispatch(monc->client, msg) == 0) | |
961 | break; | |
962 | ||
ba75bb98 SW |
963 | pr_err("received unknown message type %d %s\n", type, |
964 | ceph_msg_type_name(type)); | |
965 | } | |
966 | ceph_msg_put(msg); | |
967 | } | |
968 | ||
969 | /* | |
970 | * Allocate memory for incoming message | |
971 | */ | |
972 | static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, | |
2450418c YS |
973 | struct ceph_msg_header *hdr, |
974 | int *skip) | |
ba75bb98 SW |
975 | { |
976 | struct ceph_mon_client *monc = con->private; | |
977 | int type = le16_to_cpu(hdr->type); | |
2450418c | 978 | int front_len = le32_to_cpu(hdr->front_len); |
5b3a4db3 | 979 | struct ceph_msg *m = NULL; |
ba75bb98 | 980 | |
2450418c | 981 | *skip = 0; |
0547a9b3 | 982 | |
ba75bb98 | 983 | switch (type) { |
ba75bb98 | 984 | case CEPH_MSG_MON_SUBSCRIBE_ACK: |
7c315c55 | 985 | m = ceph_msg_get(monc->m_subscribe_ack); |
2450418c | 986 | break; |
e56fa10e | 987 | case CEPH_MSG_POOLOP_REPLY: |
ba75bb98 | 988 | case CEPH_MSG_STATFS_REPLY: |
f8c76f6f | 989 | return get_generic_reply(con, hdr, skip); |
4e7a5dcd | 990 | case CEPH_MSG_AUTH_REPLY: |
6694d6b9 | 991 | m = ceph_msg_get(monc->m_auth_reply); |
2450418c | 992 | break; |
5b3a4db3 SW |
993 | case CEPH_MSG_MON_MAP: |
994 | case CEPH_MSG_MDS_MAP: | |
995 | case CEPH_MSG_OSD_MAP: | |
b61c2763 | 996 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); |
1c20f2d2 AE |
997 | if (!m) |
998 | return NULL; /* ENOMEM--return skip == 0 */ | |
5b3a4db3 | 999 | break; |
ba75bb98 | 1000 | } |
2450418c | 1001 | |
5b3a4db3 SW |
1002 | if (!m) { |
1003 | pr_info("alloc_msg unknown type %d\n", type); | |
2450418c | 1004 | *skip = 1; |
5b3a4db3 | 1005 | } |
2450418c | 1006 | return m; |
ba75bb98 SW |
1007 | } |
1008 | ||
1009 | /* | |
1010 | * If the monitor connection resets, pick a new monitor and resubmit | |
1011 | * any pending requests. | |
1012 | */ | |
1013 | static void mon_fault(struct ceph_connection *con) | |
1014 | { | |
1015 | struct ceph_mon_client *monc = con->private; | |
1016 | ||
1017 | if (!monc) | |
1018 | return; | |
1019 | ||
1020 | dout("mon_fault\n"); | |
1021 | mutex_lock(&monc->mutex); | |
1022 | if (!con->private) | |
1023 | goto out; | |
1024 | ||
f6a2f5be | 1025 | if (!monc->hunting) |
ba75bb98 SW |
1026 | pr_info("mon%d %s session lost, " |
1027 | "hunting for new mon\n", monc->cur_mon, | |
67130934 | 1028 | ceph_pr_addr(&monc->con.peer_addr.in_addr)); |
ba75bb98 SW |
1029 | |
1030 | __close_session(monc); | |
1031 | if (!monc->hunting) { | |
1032 | /* start hunting */ | |
1033 | monc->hunting = true; | |
4e7a5dcd | 1034 | __open_session(monc); |
ba75bb98 SW |
1035 | } else { |
1036 | /* already hunting, let's wait a bit */ | |
1037 | __schedule_delayed(monc); | |
1038 | } | |
1039 | out: | |
1040 | mutex_unlock(&monc->mutex); | |
1041 | } | |
1042 | ||
ec87ef43 SW |
1043 | /* |
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. | |
1047 | */ | |
1048 | static struct ceph_connection *con_get(struct ceph_connection *con) | |
1049 | { | |
1050 | return con; | |
1051 | } | |
1052 | ||
1053 | static void con_put(struct ceph_connection *con) | |
1054 | { | |
1055 | } | |
1056 | ||
9e32789f | 1057 | static const struct ceph_connection_operations mon_con_ops = { |
ec87ef43 SW |
1058 | .get = con_get, |
1059 | .put = con_put, | |
ba75bb98 SW |
1060 | .dispatch = dispatch, |
1061 | .fault = mon_fault, | |
1062 | .alloc_msg = mon_alloc_msg, | |
ba75bb98 | 1063 | }; |