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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); |
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, | |
3cea4c30 | 155 | monc->m_auth->front_alloc_len); |
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; |
3cea4c30 | 199 | end = p + msg->front_alloc_len; |
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 | } | |
6044cde6 ID |
299 | EXPORT_SYMBOL(ceph_monc_request_next_osdmap); |
300 | ||
301 | int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch, | |
302 | unsigned long timeout) | |
303 | { | |
304 | unsigned long started = jiffies; | |
305 | int ret; | |
306 | ||
307 | mutex_lock(&monc->mutex); | |
308 | while (monc->have_osdmap < epoch) { | |
309 | mutex_unlock(&monc->mutex); | |
310 | ||
311 | if (timeout != 0 && time_after_eq(jiffies, started + timeout)) | |
312 | return -ETIMEDOUT; | |
313 | ||
314 | ret = wait_event_interruptible_timeout(monc->client->auth_wq, | |
315 | monc->have_osdmap >= epoch, timeout); | |
316 | if (ret < 0) | |
317 | return ret; | |
318 | ||
319 | mutex_lock(&monc->mutex); | |
320 | } | |
321 | ||
322 | mutex_unlock(&monc->mutex); | |
323 | return 0; | |
324 | } | |
325 | EXPORT_SYMBOL(ceph_monc_wait_osdmap); | |
ba75bb98 | 326 | |
4e7a5dcd | 327 | /* |
50b885b9 | 328 | * |
4e7a5dcd SW |
329 | */ |
330 | int ceph_monc_open_session(struct ceph_mon_client *monc) | |
ba75bb98 | 331 | { |
ba75bb98 | 332 | mutex_lock(&monc->mutex); |
4e7a5dcd | 333 | __open_session(monc); |
ba75bb98 SW |
334 | __schedule_delayed(monc); |
335 | mutex_unlock(&monc->mutex); | |
336 | return 0; | |
337 | } | |
3d14c5d2 | 338 | EXPORT_SYMBOL(ceph_monc_open_session); |
ba75bb98 | 339 | |
d1c338a5 SW |
340 | /* |
341 | * We require the fsid and global_id in order to initialize our | |
342 | * debugfs dir. | |
343 | */ | |
344 | static bool have_debugfs_info(struct ceph_mon_client *monc) | |
345 | { | |
346 | dout("have_debugfs_info fsid %d globalid %lld\n", | |
347 | (int)monc->client->have_fsid, monc->auth->global_id); | |
348 | return monc->client->have_fsid && monc->auth->global_id > 0; | |
349 | } | |
350 | ||
4e7a5dcd SW |
351 | /* |
352 | * The monitor responds with mount ack indicate mount success. The | |
353 | * included client ticket allows the client to talk to MDSs and OSDs. | |
354 | */ | |
0743304d SW |
355 | static void ceph_monc_handle_map(struct ceph_mon_client *monc, |
356 | struct ceph_msg *msg) | |
4e7a5dcd SW |
357 | { |
358 | struct ceph_client *client = monc->client; | |
359 | struct ceph_monmap *monmap = NULL, *old = monc->monmap; | |
360 | void *p, *end; | |
d1c338a5 | 361 | int had_debugfs_info, init_debugfs = 0; |
4e7a5dcd SW |
362 | |
363 | mutex_lock(&monc->mutex); | |
364 | ||
d1c338a5 SW |
365 | had_debugfs_info = have_debugfs_info(monc); |
366 | ||
4e7a5dcd SW |
367 | dout("handle_monmap\n"); |
368 | p = msg->front.iov_base; | |
369 | end = p + msg->front.iov_len; | |
370 | ||
371 | monmap = ceph_monmap_decode(p, end); | |
372 | if (IS_ERR(monmap)) { | |
373 | pr_err("problem decoding monmap, %d\n", | |
374 | (int)PTR_ERR(monmap)); | |
d4a780ce | 375 | goto out; |
4e7a5dcd | 376 | } |
0743304d SW |
377 | |
378 | if (ceph_check_fsid(monc->client, &monmap->fsid) < 0) { | |
4e7a5dcd | 379 | kfree(monmap); |
d4a780ce | 380 | goto out; |
4e7a5dcd SW |
381 | } |
382 | ||
383 | client->monc.monmap = monmap; | |
4e7a5dcd SW |
384 | kfree(old); |
385 | ||
ab434b60 SW |
386 | if (!client->have_fsid) { |
387 | client->have_fsid = true; | |
d1c338a5 SW |
388 | if (!had_debugfs_info && have_debugfs_info(monc)) { |
389 | pr_info("client%lld fsid %pU\n", | |
390 | ceph_client_id(monc->client), | |
391 | &monc->client->fsid); | |
392 | init_debugfs = 1; | |
393 | } | |
ab434b60 | 394 | mutex_unlock(&monc->mutex); |
d1c338a5 SW |
395 | |
396 | if (init_debugfs) { | |
397 | /* | |
398 | * do debugfs initialization without mutex to avoid | |
399 | * creating a locking dependency | |
400 | */ | |
401 | ceph_debugfs_client_init(monc->client); | |
402 | } | |
403 | ||
ab434b60 SW |
404 | goto out_unlocked; |
405 | } | |
d4a780ce | 406 | out: |
4e7a5dcd | 407 | mutex_unlock(&monc->mutex); |
ab434b60 | 408 | out_unlocked: |
03066f23 | 409 | wake_up_all(&client->auth_wq); |
4e7a5dcd SW |
410 | } |
411 | ||
ba75bb98 | 412 | /* |
7a6fdeb2 | 413 | * generic requests (currently statfs, mon_get_version) |
ba75bb98 | 414 | */ |
f8c76f6f | 415 | static struct ceph_mon_generic_request *__lookup_generic_req( |
85ff03f6 SW |
416 | struct ceph_mon_client *monc, u64 tid) |
417 | { | |
f8c76f6f YS |
418 | struct ceph_mon_generic_request *req; |
419 | struct rb_node *n = monc->generic_request_tree.rb_node; | |
85ff03f6 SW |
420 | |
421 | while (n) { | |
f8c76f6f | 422 | req = rb_entry(n, struct ceph_mon_generic_request, node); |
85ff03f6 SW |
423 | if (tid < req->tid) |
424 | n = n->rb_left; | |
425 | else if (tid > req->tid) | |
426 | n = n->rb_right; | |
427 | else | |
428 | return req; | |
429 | } | |
430 | return NULL; | |
431 | } | |
432 | ||
f8c76f6f YS |
433 | static void __insert_generic_request(struct ceph_mon_client *monc, |
434 | struct ceph_mon_generic_request *new) | |
85ff03f6 | 435 | { |
f8c76f6f | 436 | struct rb_node **p = &monc->generic_request_tree.rb_node; |
85ff03f6 | 437 | struct rb_node *parent = NULL; |
f8c76f6f | 438 | struct ceph_mon_generic_request *req = NULL; |
85ff03f6 SW |
439 | |
440 | while (*p) { | |
441 | parent = *p; | |
f8c76f6f | 442 | req = rb_entry(parent, struct ceph_mon_generic_request, node); |
85ff03f6 SW |
443 | if (new->tid < req->tid) |
444 | p = &(*p)->rb_left; | |
445 | else if (new->tid > req->tid) | |
446 | p = &(*p)->rb_right; | |
447 | else | |
448 | BUG(); | |
449 | } | |
450 | ||
451 | rb_link_node(&new->node, parent, p); | |
f8c76f6f | 452 | rb_insert_color(&new->node, &monc->generic_request_tree); |
85ff03f6 SW |
453 | } |
454 | ||
f8c76f6f | 455 | static void release_generic_request(struct kref *kref) |
3143edd3 | 456 | { |
f8c76f6f YS |
457 | struct ceph_mon_generic_request *req = |
458 | container_of(kref, struct ceph_mon_generic_request, kref); | |
3143edd3 SW |
459 | |
460 | if (req->reply) | |
461 | ceph_msg_put(req->reply); | |
462 | if (req->request) | |
463 | ceph_msg_put(req->request); | |
20547567 YS |
464 | |
465 | kfree(req); | |
3143edd3 SW |
466 | } |
467 | ||
f8c76f6f | 468 | static void put_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 | 469 | { |
f8c76f6f | 470 | kref_put(&req->kref, release_generic_request); |
3143edd3 SW |
471 | } |
472 | ||
f8c76f6f | 473 | static void get_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 SW |
474 | { |
475 | kref_get(&req->kref); | |
476 | } | |
477 | ||
f8c76f6f | 478 | static struct ceph_msg *get_generic_reply(struct ceph_connection *con, |
3143edd3 SW |
479 | struct ceph_msg_header *hdr, |
480 | int *skip) | |
481 | { | |
482 | struct ceph_mon_client *monc = con->private; | |
f8c76f6f | 483 | struct ceph_mon_generic_request *req; |
3143edd3 SW |
484 | u64 tid = le64_to_cpu(hdr->tid); |
485 | struct ceph_msg *m; | |
486 | ||
487 | mutex_lock(&monc->mutex); | |
f8c76f6f | 488 | req = __lookup_generic_req(monc, tid); |
3143edd3 | 489 | if (!req) { |
f8c76f6f | 490 | dout("get_generic_reply %lld dne\n", tid); |
3143edd3 SW |
491 | *skip = 1; |
492 | m = NULL; | |
493 | } else { | |
f8c76f6f | 494 | dout("get_generic_reply %lld got %p\n", tid, req->reply); |
1c20f2d2 | 495 | *skip = 0; |
3143edd3 SW |
496 | m = ceph_msg_get(req->reply); |
497 | /* | |
498 | * we don't need to track the connection reading into | |
499 | * this reply because we only have one open connection | |
500 | * at a time, ever. | |
501 | */ | |
502 | } | |
503 | mutex_unlock(&monc->mutex); | |
504 | return m; | |
505 | } | |
506 | ||
513a8243 ID |
507 | static int __do_generic_request(struct ceph_mon_client *monc, u64 tid, |
508 | struct ceph_mon_generic_request *req) | |
e56fa10e YS |
509 | { |
510 | int err; | |
511 | ||
512 | /* register request */ | |
513a8243 | 513 | req->tid = tid != 0 ? tid : ++monc->last_tid; |
e56fa10e YS |
514 | req->request->hdr.tid = cpu_to_le64(req->tid); |
515 | __insert_generic_request(monc, req); | |
516 | monc->num_generic_requests++; | |
67130934 | 517 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
e56fa10e YS |
518 | mutex_unlock(&monc->mutex); |
519 | ||
520 | err = wait_for_completion_interruptible(&req->completion); | |
521 | ||
522 | mutex_lock(&monc->mutex); | |
523 | rb_erase(&req->node, &monc->generic_request_tree); | |
524 | monc->num_generic_requests--; | |
e56fa10e YS |
525 | |
526 | if (!err) | |
527 | err = req->result; | |
528 | return err; | |
529 | } | |
530 | ||
513a8243 ID |
531 | static int do_generic_request(struct ceph_mon_client *monc, |
532 | struct ceph_mon_generic_request *req) | |
533 | { | |
534 | int err; | |
535 | ||
536 | mutex_lock(&monc->mutex); | |
537 | err = __do_generic_request(monc, 0, req); | |
538 | mutex_unlock(&monc->mutex); | |
539 | ||
540 | return err; | |
541 | } | |
542 | ||
e56fa10e YS |
543 | /* |
544 | * statfs | |
545 | */ | |
ba75bb98 SW |
546 | static void handle_statfs_reply(struct ceph_mon_client *monc, |
547 | struct ceph_msg *msg) | |
548 | { | |
f8c76f6f | 549 | struct ceph_mon_generic_request *req; |
ba75bb98 | 550 | struct ceph_mon_statfs_reply *reply = msg->front.iov_base; |
3143edd3 | 551 | u64 tid = le64_to_cpu(msg->hdr.tid); |
ba75bb98 SW |
552 | |
553 | if (msg->front.iov_len != sizeof(*reply)) | |
554 | goto bad; | |
ba75bb98 SW |
555 | dout("handle_statfs_reply %p tid %llu\n", msg, tid); |
556 | ||
557 | mutex_lock(&monc->mutex); | |
f8c76f6f | 558 | req = __lookup_generic_req(monc, tid); |
ba75bb98 | 559 | if (req) { |
f8c76f6f | 560 | *(struct ceph_statfs *)req->buf = reply->st; |
ba75bb98 | 561 | req->result = 0; |
f8c76f6f | 562 | get_generic_request(req); |
ba75bb98 SW |
563 | } |
564 | mutex_unlock(&monc->mutex); | |
3143edd3 | 565 | if (req) { |
03066f23 | 566 | complete_all(&req->completion); |
f8c76f6f | 567 | put_generic_request(req); |
3143edd3 | 568 | } |
ba75bb98 SW |
569 | return; |
570 | ||
571 | bad: | |
7a6fdeb2 | 572 | pr_err("corrupt statfs reply, tid %llu\n", tid); |
9ec7cab1 | 573 | ceph_msg_dump(msg); |
ba75bb98 SW |
574 | } |
575 | ||
576 | /* | |
3143edd3 | 577 | * Do a synchronous statfs(). |
ba75bb98 | 578 | */ |
3143edd3 | 579 | int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf) |
ba75bb98 | 580 | { |
f8c76f6f | 581 | struct ceph_mon_generic_request *req; |
ba75bb98 | 582 | struct ceph_mon_statfs *h; |
3143edd3 SW |
583 | int err; |
584 | ||
cffe7b6d | 585 | req = kzalloc(sizeof(*req), GFP_NOFS); |
3143edd3 SW |
586 | if (!req) |
587 | return -ENOMEM; | |
588 | ||
3143edd3 SW |
589 | kref_init(&req->kref); |
590 | req->buf = buf; | |
591 | init_completion(&req->completion); | |
ba75bb98 | 592 | |
a79832f2 | 593 | err = -ENOMEM; |
b61c2763 SW |
594 | req->request = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), GFP_NOFS, |
595 | true); | |
a79832f2 | 596 | if (!req->request) |
3143edd3 | 597 | goto out; |
b61c2763 SW |
598 | req->reply = ceph_msg_new(CEPH_MSG_STATFS_REPLY, 1024, GFP_NOFS, |
599 | true); | |
a79832f2 | 600 | if (!req->reply) |
3143edd3 | 601 | goto out; |
3143edd3 SW |
602 | |
603 | /* fill out request */ | |
604 | h = req->request->front.iov_base; | |
13e38c8a SW |
605 | h->monhdr.have_version = 0; |
606 | h->monhdr.session_mon = cpu_to_le16(-1); | |
607 | h->monhdr.session_mon_tid = 0; | |
ba75bb98 | 608 | h->fsid = monc->monmap->fsid; |
ba75bb98 | 609 | |
e56fa10e | 610 | err = do_generic_request(monc, req); |
ba75bb98 | 611 | |
e56fa10e | 612 | out: |
f646912d | 613 | put_generic_request(req); |
e56fa10e YS |
614 | return err; |
615 | } | |
3d14c5d2 | 616 | EXPORT_SYMBOL(ceph_monc_do_statfs); |
e56fa10e | 617 | |
513a8243 ID |
618 | static void handle_get_version_reply(struct ceph_mon_client *monc, |
619 | struct ceph_msg *msg) | |
620 | { | |
621 | struct ceph_mon_generic_request *req; | |
622 | u64 tid = le64_to_cpu(msg->hdr.tid); | |
623 | void *p = msg->front.iov_base; | |
624 | void *end = p + msg->front_alloc_len; | |
625 | u64 handle; | |
626 | ||
627 | dout("%s %p tid %llu\n", __func__, msg, tid); | |
628 | ||
629 | ceph_decode_need(&p, end, 2*sizeof(u64), bad); | |
630 | handle = ceph_decode_64(&p); | |
631 | if (tid != 0 && tid != handle) | |
632 | goto bad; | |
633 | ||
634 | mutex_lock(&monc->mutex); | |
635 | req = __lookup_generic_req(monc, handle); | |
636 | if (req) { | |
637 | *(u64 *)req->buf = ceph_decode_64(&p); | |
638 | req->result = 0; | |
639 | get_generic_request(req); | |
640 | } | |
641 | mutex_unlock(&monc->mutex); | |
642 | if (req) { | |
643 | complete_all(&req->completion); | |
644 | put_generic_request(req); | |
645 | } | |
646 | ||
647 | return; | |
648 | bad: | |
7a6fdeb2 | 649 | pr_err("corrupt mon_get_version reply, tid %llu\n", tid); |
513a8243 ID |
650 | ceph_msg_dump(msg); |
651 | } | |
652 | ||
653 | /* | |
654 | * Send MMonGetVersion and wait for the reply. | |
655 | * | |
656 | * @what: one of "mdsmap", "osdmap" or "monmap" | |
657 | */ | |
658 | int ceph_monc_do_get_version(struct ceph_mon_client *monc, const char *what, | |
659 | u64 *newest) | |
660 | { | |
661 | struct ceph_mon_generic_request *req; | |
662 | void *p, *end; | |
663 | u64 tid; | |
664 | int err; | |
665 | ||
666 | req = kzalloc(sizeof(*req), GFP_NOFS); | |
667 | if (!req) | |
668 | return -ENOMEM; | |
669 | ||
670 | kref_init(&req->kref); | |
671 | req->buf = newest; | |
513a8243 ID |
672 | init_completion(&req->completion); |
673 | ||
674 | req->request = ceph_msg_new(CEPH_MSG_MON_GET_VERSION, | |
675 | sizeof(u64) + sizeof(u32) + strlen(what), | |
676 | GFP_NOFS, true); | |
677 | if (!req->request) { | |
678 | err = -ENOMEM; | |
679 | goto out; | |
680 | } | |
681 | ||
682 | req->reply = ceph_msg_new(CEPH_MSG_MON_GET_VERSION_REPLY, 1024, | |
683 | GFP_NOFS, true); | |
684 | if (!req->reply) { | |
685 | err = -ENOMEM; | |
686 | goto out; | |
687 | } | |
688 | ||
689 | p = req->request->front.iov_base; | |
690 | end = p + req->request->front_alloc_len; | |
691 | ||
692 | /* fill out request */ | |
693 | mutex_lock(&monc->mutex); | |
694 | tid = ++monc->last_tid; | |
695 | ceph_encode_64(&p, tid); /* handle */ | |
696 | ceph_encode_string(&p, end, what, strlen(what)); | |
697 | ||
698 | err = __do_generic_request(monc, tid, req); | |
699 | ||
700 | mutex_unlock(&monc->mutex); | |
701 | out: | |
f646912d | 702 | put_generic_request(req); |
513a8243 ID |
703 | return err; |
704 | } | |
705 | EXPORT_SYMBOL(ceph_monc_do_get_version); | |
706 | ||
ba75bb98 | 707 | /* |
e56fa10e | 708 | * Resend pending generic requests. |
ba75bb98 | 709 | */ |
f8c76f6f | 710 | static void __resend_generic_request(struct ceph_mon_client *monc) |
ba75bb98 | 711 | { |
f8c76f6f | 712 | struct ceph_mon_generic_request *req; |
85ff03f6 | 713 | struct rb_node *p; |
ba75bb98 | 714 | |
f8c76f6f YS |
715 | for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) { |
716 | req = rb_entry(p, struct ceph_mon_generic_request, node); | |
6740a845 | 717 | ceph_msg_revoke(req->request); |
4f471e4a | 718 | ceph_msg_revoke_incoming(req->reply); |
67130934 | 719 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
ba75bb98 SW |
720 | } |
721 | } | |
722 | ||
723 | /* | |
724 | * Delayed work. If we haven't mounted yet, retry. Otherwise, | |
725 | * renew/retry subscription as needed (in case it is timing out, or we | |
726 | * got an ENOMEM). And keep the monitor connection alive. | |
727 | */ | |
728 | static void delayed_work(struct work_struct *work) | |
729 | { | |
730 | struct ceph_mon_client *monc = | |
731 | container_of(work, struct ceph_mon_client, delayed_work.work); | |
732 | ||
733 | dout("monc delayed_work\n"); | |
734 | mutex_lock(&monc->mutex); | |
4e7a5dcd SW |
735 | if (monc->hunting) { |
736 | __close_session(monc); | |
737 | __open_session(monc); /* continue hunting */ | |
ba75bb98 | 738 | } else { |
67130934 | 739 | ceph_con_keepalive(&monc->con); |
9bd2e6f8 SW |
740 | |
741 | __validate_auth(monc); | |
742 | ||
27859f97 | 743 | if (ceph_auth_is_authenticated(monc->auth)) |
4e7a5dcd | 744 | __send_subscribe(monc); |
ba75bb98 | 745 | } |
ba75bb98 SW |
746 | __schedule_delayed(monc); |
747 | mutex_unlock(&monc->mutex); | |
748 | } | |
749 | ||
6b805185 SW |
750 | /* |
751 | * On startup, we build a temporary monmap populated with the IPs | |
752 | * provided by mount(2). | |
753 | */ | |
754 | static int build_initial_monmap(struct ceph_mon_client *monc) | |
755 | { | |
3d14c5d2 YS |
756 | struct ceph_options *opt = monc->client->options; |
757 | struct ceph_entity_addr *mon_addr = opt->mon_addr; | |
758 | int num_mon = opt->num_mon; | |
6b805185 SW |
759 | int i; |
760 | ||
761 | /* build initial monmap */ | |
762 | monc->monmap = kzalloc(sizeof(*monc->monmap) + | |
763 | num_mon*sizeof(monc->monmap->mon_inst[0]), | |
764 | GFP_KERNEL); | |
765 | if (!monc->monmap) | |
766 | return -ENOMEM; | |
767 | for (i = 0; i < num_mon; i++) { | |
768 | monc->monmap->mon_inst[i].addr = mon_addr[i]; | |
6b805185 SW |
769 | monc->monmap->mon_inst[i].addr.nonce = 0; |
770 | monc->monmap->mon_inst[i].name.type = | |
771 | CEPH_ENTITY_TYPE_MON; | |
772 | monc->monmap->mon_inst[i].name.num = cpu_to_le64(i); | |
773 | } | |
774 | monc->monmap->num_mon = num_mon; | |
6b805185 SW |
775 | return 0; |
776 | } | |
777 | ||
ba75bb98 SW |
778 | int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl) |
779 | { | |
780 | int err = 0; | |
781 | ||
782 | dout("init\n"); | |
783 | memset(monc, 0, sizeof(*monc)); | |
784 | monc->client = cl; | |
785 | monc->monmap = NULL; | |
786 | mutex_init(&monc->mutex); | |
787 | ||
6b805185 SW |
788 | err = build_initial_monmap(monc); |
789 | if (err) | |
790 | goto out; | |
791 | ||
f6a2f5be | 792 | /* connection */ |
4e7a5dcd | 793 | /* authentication */ |
3d14c5d2 | 794 | monc->auth = ceph_auth_init(cl->options->name, |
8323c3aa | 795 | cl->options->key); |
49d9224c NW |
796 | if (IS_ERR(monc->auth)) { |
797 | err = PTR_ERR(monc->auth); | |
67130934 | 798 | goto out_monmap; |
49d9224c | 799 | } |
4e7a5dcd SW |
800 | monc->auth->want_keys = |
801 | CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON | | |
802 | CEPH_ENTITY_TYPE_OSD | CEPH_ENTITY_TYPE_MDS; | |
803 | ||
240ed68e | 804 | /* msgs */ |
a79832f2 | 805 | err = -ENOMEM; |
7c315c55 | 806 | monc->m_subscribe_ack = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE_ACK, |
34d23762 | 807 | sizeof(struct ceph_mon_subscribe_ack), |
b61c2763 | 808 | GFP_NOFS, true); |
a79832f2 | 809 | if (!monc->m_subscribe_ack) |
49d9224c | 810 | goto out_auth; |
6694d6b9 | 811 | |
b61c2763 SW |
812 | monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 96, GFP_NOFS, |
813 | true); | |
240ed68e SW |
814 | if (!monc->m_subscribe) |
815 | goto out_subscribe_ack; | |
816 | ||
b61c2763 SW |
817 | monc->m_auth_reply = ceph_msg_new(CEPH_MSG_AUTH_REPLY, 4096, GFP_NOFS, |
818 | true); | |
a79832f2 | 819 | if (!monc->m_auth_reply) |
240ed68e | 820 | goto out_subscribe; |
4e7a5dcd | 821 | |
b61c2763 | 822 | monc->m_auth = ceph_msg_new(CEPH_MSG_AUTH, 4096, GFP_NOFS, true); |
9bd2e6f8 | 823 | monc->pending_auth = 0; |
a79832f2 | 824 | if (!monc->m_auth) |
6694d6b9 | 825 | goto out_auth_reply; |
ba75bb98 | 826 | |
735a72ef SW |
827 | ceph_con_init(&monc->con, monc, &mon_con_ops, |
828 | &monc->client->msgr); | |
829 | ||
ba75bb98 | 830 | monc->cur_mon = -1; |
4e7a5dcd | 831 | monc->hunting = true; |
ba75bb98 SW |
832 | monc->sub_renew_after = jiffies; |
833 | monc->sub_sent = 0; | |
834 | ||
835 | INIT_DELAYED_WORK(&monc->delayed_work, delayed_work); | |
f8c76f6f YS |
836 | monc->generic_request_tree = RB_ROOT; |
837 | monc->num_generic_requests = 0; | |
ba75bb98 SW |
838 | monc->last_tid = 0; |
839 | ||
840 | monc->have_mdsmap = 0; | |
841 | monc->have_osdmap = 0; | |
842 | monc->want_next_osdmap = 1; | |
4e7a5dcd SW |
843 | return 0; |
844 | ||
6694d6b9 SW |
845 | out_auth_reply: |
846 | ceph_msg_put(monc->m_auth_reply); | |
240ed68e SW |
847 | out_subscribe: |
848 | ceph_msg_put(monc->m_subscribe); | |
7c315c55 SW |
849 | out_subscribe_ack: |
850 | ceph_msg_put(monc->m_subscribe_ack); | |
49d9224c NW |
851 | out_auth: |
852 | ceph_auth_destroy(monc->auth); | |
4e7a5dcd SW |
853 | out_monmap: |
854 | kfree(monc->monmap); | |
ba75bb98 SW |
855 | out: |
856 | return err; | |
857 | } | |
3d14c5d2 | 858 | EXPORT_SYMBOL(ceph_monc_init); |
ba75bb98 SW |
859 | |
860 | void ceph_monc_stop(struct ceph_mon_client *monc) | |
861 | { | |
862 | dout("stop\n"); | |
863 | cancel_delayed_work_sync(&monc->delayed_work); | |
864 | ||
865 | mutex_lock(&monc->mutex); | |
866 | __close_session(monc); | |
f6a2f5be | 867 | |
ba75bb98 SW |
868 | mutex_unlock(&monc->mutex); |
869 | ||
f3dea7ed SW |
870 | /* |
871 | * flush msgr queue before we destroy ourselves to ensure that: | |
872 | * - any work that references our embedded con is finished. | |
873 | * - any osd_client or other work that may reference an authorizer | |
874 | * finishes before we shut down the auth subsystem. | |
875 | */ | |
876 | ceph_msgr_flush(); | |
877 | ||
4e7a5dcd SW |
878 | ceph_auth_destroy(monc->auth); |
879 | ||
880 | ceph_msg_put(monc->m_auth); | |
6694d6b9 | 881 | ceph_msg_put(monc->m_auth_reply); |
240ed68e | 882 | ceph_msg_put(monc->m_subscribe); |
7c315c55 | 883 | ceph_msg_put(monc->m_subscribe_ack); |
ba75bb98 SW |
884 | |
885 | kfree(monc->monmap); | |
886 | } | |
3d14c5d2 | 887 | EXPORT_SYMBOL(ceph_monc_stop); |
ba75bb98 | 888 | |
4e7a5dcd SW |
889 | static void handle_auth_reply(struct ceph_mon_client *monc, |
890 | struct ceph_msg *msg) | |
891 | { | |
892 | int ret; | |
09c4d6a7 | 893 | int was_auth = 0; |
d1c338a5 | 894 | int had_debugfs_info, init_debugfs = 0; |
4e7a5dcd SW |
895 | |
896 | mutex_lock(&monc->mutex); | |
d1c338a5 | 897 | had_debugfs_info = have_debugfs_info(monc); |
27859f97 | 898 | was_auth = ceph_auth_is_authenticated(monc->auth); |
9bd2e6f8 | 899 | monc->pending_auth = 0; |
4e7a5dcd SW |
900 | ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base, |
901 | msg->front.iov_len, | |
902 | monc->m_auth->front.iov_base, | |
3cea4c30 | 903 | monc->m_auth->front_alloc_len); |
4e7a5dcd | 904 | if (ret < 0) { |
9bd2e6f8 | 905 | monc->client->auth_err = ret; |
03066f23 | 906 | wake_up_all(&monc->client->auth_wq); |
4e7a5dcd | 907 | } else if (ret > 0) { |
9bd2e6f8 | 908 | __send_prepared_auth_request(monc, ret); |
27859f97 | 909 | } else if (!was_auth && ceph_auth_is_authenticated(monc->auth)) { |
4e7a5dcd | 910 | dout("authenticated, starting session\n"); |
0743304d | 911 | |
15d9882c AE |
912 | monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT; |
913 | monc->client->msgr.inst.name.num = | |
0cf5537b | 914 | cpu_to_le64(monc->auth->global_id); |
0743304d | 915 | |
4e7a5dcd | 916 | __send_subscribe(monc); |
f8c76f6f | 917 | __resend_generic_request(monc); |
4e7a5dcd | 918 | } |
d1c338a5 SW |
919 | |
920 | if (!had_debugfs_info && have_debugfs_info(monc)) { | |
921 | pr_info("client%lld fsid %pU\n", | |
922 | ceph_client_id(monc->client), | |
923 | &monc->client->fsid); | |
924 | init_debugfs = 1; | |
925 | } | |
4e7a5dcd | 926 | mutex_unlock(&monc->mutex); |
d1c338a5 SW |
927 | |
928 | if (init_debugfs) { | |
929 | /* | |
930 | * do debugfs initialization without mutex to avoid | |
931 | * creating a locking dependency | |
932 | */ | |
933 | ceph_debugfs_client_init(monc->client); | |
934 | } | |
4e7a5dcd SW |
935 | } |
936 | ||
9bd2e6f8 SW |
937 | static int __validate_auth(struct ceph_mon_client *monc) |
938 | { | |
939 | int ret; | |
940 | ||
941 | if (monc->pending_auth) | |
942 | return 0; | |
943 | ||
944 | ret = ceph_build_auth(monc->auth, monc->m_auth->front.iov_base, | |
3cea4c30 | 945 | monc->m_auth->front_alloc_len); |
9bd2e6f8 SW |
946 | if (ret <= 0) |
947 | return ret; /* either an error, or no need to authenticate */ | |
948 | __send_prepared_auth_request(monc, ret); | |
949 | return 0; | |
950 | } | |
951 | ||
952 | int ceph_monc_validate_auth(struct ceph_mon_client *monc) | |
953 | { | |
954 | int ret; | |
955 | ||
956 | mutex_lock(&monc->mutex); | |
957 | ret = __validate_auth(monc); | |
958 | mutex_unlock(&monc->mutex); | |
959 | return ret; | |
960 | } | |
3d14c5d2 | 961 | EXPORT_SYMBOL(ceph_monc_validate_auth); |
9bd2e6f8 | 962 | |
ba75bb98 SW |
963 | /* |
964 | * handle incoming message | |
965 | */ | |
966 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
967 | { | |
968 | struct ceph_mon_client *monc = con->private; | |
969 | int type = le16_to_cpu(msg->hdr.type); | |
970 | ||
971 | if (!monc) | |
972 | return; | |
973 | ||
974 | switch (type) { | |
4e7a5dcd SW |
975 | case CEPH_MSG_AUTH_REPLY: |
976 | handle_auth_reply(monc, msg); | |
ba75bb98 SW |
977 | break; |
978 | ||
979 | case CEPH_MSG_MON_SUBSCRIBE_ACK: | |
980 | handle_subscribe_ack(monc, msg); | |
981 | break; | |
982 | ||
983 | case CEPH_MSG_STATFS_REPLY: | |
984 | handle_statfs_reply(monc, msg); | |
985 | break; | |
986 | ||
513a8243 ID |
987 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
988 | handle_get_version_reply(monc, msg); | |
989 | break; | |
990 | ||
4e7a5dcd SW |
991 | case CEPH_MSG_MON_MAP: |
992 | ceph_monc_handle_map(monc, msg); | |
993 | break; | |
994 | ||
ba75bb98 SW |
995 | case CEPH_MSG_OSD_MAP: |
996 | ceph_osdc_handle_map(&monc->client->osdc, msg); | |
997 | break; | |
998 | ||
999 | default: | |
3d14c5d2 YS |
1000 | /* can the chained handler handle it? */ |
1001 | if (monc->client->extra_mon_dispatch && | |
1002 | monc->client->extra_mon_dispatch(monc->client, msg) == 0) | |
1003 | break; | |
1004 | ||
ba75bb98 SW |
1005 | pr_err("received unknown message type %d %s\n", type, |
1006 | ceph_msg_type_name(type)); | |
1007 | } | |
1008 | ceph_msg_put(msg); | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * Allocate memory for incoming message | |
1013 | */ | |
1014 | static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, | |
2450418c YS |
1015 | struct ceph_msg_header *hdr, |
1016 | int *skip) | |
ba75bb98 SW |
1017 | { |
1018 | struct ceph_mon_client *monc = con->private; | |
1019 | int type = le16_to_cpu(hdr->type); | |
2450418c | 1020 | int front_len = le32_to_cpu(hdr->front_len); |
5b3a4db3 | 1021 | struct ceph_msg *m = NULL; |
ba75bb98 | 1022 | |
2450418c | 1023 | *skip = 0; |
0547a9b3 | 1024 | |
ba75bb98 | 1025 | switch (type) { |
ba75bb98 | 1026 | case CEPH_MSG_MON_SUBSCRIBE_ACK: |
7c315c55 | 1027 | m = ceph_msg_get(monc->m_subscribe_ack); |
2450418c | 1028 | break; |
ba75bb98 | 1029 | case CEPH_MSG_STATFS_REPLY: |
f8c76f6f | 1030 | return get_generic_reply(con, hdr, skip); |
4e7a5dcd | 1031 | case CEPH_MSG_AUTH_REPLY: |
6694d6b9 | 1032 | m = ceph_msg_get(monc->m_auth_reply); |
2450418c | 1033 | break; |
513a8243 ID |
1034 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
1035 | if (le64_to_cpu(hdr->tid) != 0) | |
1036 | return get_generic_reply(con, hdr, skip); | |
1037 | ||
1038 | /* | |
1039 | * Older OSDs don't set reply tid even if the orignal | |
1040 | * request had a non-zero tid. Workaround this weirdness | |
1041 | * by falling through to the allocate case. | |
1042 | */ | |
5b3a4db3 SW |
1043 | case CEPH_MSG_MON_MAP: |
1044 | case CEPH_MSG_MDS_MAP: | |
1045 | case CEPH_MSG_OSD_MAP: | |
b61c2763 | 1046 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); |
1c20f2d2 AE |
1047 | if (!m) |
1048 | return NULL; /* ENOMEM--return skip == 0 */ | |
5b3a4db3 | 1049 | break; |
ba75bb98 | 1050 | } |
2450418c | 1051 | |
5b3a4db3 SW |
1052 | if (!m) { |
1053 | pr_info("alloc_msg unknown type %d\n", type); | |
2450418c | 1054 | *skip = 1; |
73c3d481 | 1055 | } else if (front_len > m->front_alloc_len) { |
b9a67899 JP |
1056 | pr_warn("mon_alloc_msg front %d > prealloc %d (%u#%llu)\n", |
1057 | front_len, m->front_alloc_len, | |
1058 | (unsigned int)con->peer_name.type, | |
1059 | le64_to_cpu(con->peer_name.num)); | |
73c3d481 SW |
1060 | ceph_msg_put(m); |
1061 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); | |
5b3a4db3 | 1062 | } |
73c3d481 | 1063 | |
2450418c | 1064 | return m; |
ba75bb98 SW |
1065 | } |
1066 | ||
1067 | /* | |
1068 | * If the monitor connection resets, pick a new monitor and resubmit | |
1069 | * any pending requests. | |
1070 | */ | |
1071 | static void mon_fault(struct ceph_connection *con) | |
1072 | { | |
1073 | struct ceph_mon_client *monc = con->private; | |
1074 | ||
1075 | if (!monc) | |
1076 | return; | |
1077 | ||
1078 | dout("mon_fault\n"); | |
1079 | mutex_lock(&monc->mutex); | |
1080 | if (!con->private) | |
1081 | goto out; | |
1082 | ||
f6a2f5be | 1083 | if (!monc->hunting) |
ba75bb98 SW |
1084 | pr_info("mon%d %s session lost, " |
1085 | "hunting for new mon\n", monc->cur_mon, | |
67130934 | 1086 | ceph_pr_addr(&monc->con.peer_addr.in_addr)); |
ba75bb98 SW |
1087 | |
1088 | __close_session(monc); | |
1089 | if (!monc->hunting) { | |
1090 | /* start hunting */ | |
1091 | monc->hunting = true; | |
4e7a5dcd | 1092 | __open_session(monc); |
ba75bb98 SW |
1093 | } else { |
1094 | /* already hunting, let's wait a bit */ | |
1095 | __schedule_delayed(monc); | |
1096 | } | |
1097 | out: | |
1098 | mutex_unlock(&monc->mutex); | |
1099 | } | |
1100 | ||
ec87ef43 SW |
1101 | /* |
1102 | * We can ignore refcounting on the connection struct, as all references | |
1103 | * will come from the messenger workqueue, which is drained prior to | |
1104 | * mon_client destruction. | |
1105 | */ | |
1106 | static struct ceph_connection *con_get(struct ceph_connection *con) | |
1107 | { | |
1108 | return con; | |
1109 | } | |
1110 | ||
1111 | static void con_put(struct ceph_connection *con) | |
1112 | { | |
1113 | } | |
1114 | ||
9e32789f | 1115 | static const struct ceph_connection_operations mon_con_ops = { |
ec87ef43 SW |
1116 | .get = con_get, |
1117 | .put = con_put, | |
ba75bb98 SW |
1118 | .dispatch = dispatch, |
1119 | .fault = mon_fault, | |
1120 | .alloc_msg = mon_alloc_msg, | |
ba75bb98 | 1121 | }; |