Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
ba75bb98 | 3 | |
3d14c5d2 | 4 | #include <linux/module.h> |
ba75bb98 | 5 | #include <linux/types.h> |
5a0e3ad6 | 6 | #include <linux/slab.h> |
ba75bb98 SW |
7 | #include <linux/random.h> |
8 | #include <linux/sched.h> | |
9 | ||
220abf5a | 10 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
11 | #include <linux/ceph/mon_client.h> |
12 | #include <linux/ceph/libceph.h> | |
ab434b60 | 13 | #include <linux/ceph/debugfs.h> |
3d14c5d2 | 14 | #include <linux/ceph/decode.h> |
3d14c5d2 | 15 | #include <linux/ceph/auth.h> |
ba75bb98 SW |
16 | |
17 | /* | |
18 | * Interact with Ceph monitor cluster. Handle requests for new map | |
19 | * versions, and periodically resend as needed. Also implement | |
20 | * statfs() and umount(). | |
21 | * | |
22 | * A small cluster of Ceph "monitors" are responsible for managing critical | |
23 | * cluster configuration and state information. An odd number (e.g., 3, 5) | |
24 | * of cmon daemons use a modified version of the Paxos part-time parliament | |
25 | * algorithm to manage the MDS map (mds cluster membership), OSD map, and | |
26 | * list of clients who have mounted the file system. | |
27 | * | |
28 | * We maintain an open, active session with a monitor at all times in order to | |
29 | * receive timely MDSMap updates. We periodically send a keepalive byte on the | |
30 | * TCP socket to ensure we detect a failure. If the connection does break, we | |
31 | * randomly hunt for a new monitor. Once the connection is reestablished, we | |
32 | * resend any outstanding requests. | |
33 | */ | |
34 | ||
9e32789f | 35 | static const struct ceph_connection_operations mon_con_ops; |
ba75bb98 | 36 | |
9bd2e6f8 SW |
37 | static int __validate_auth(struct ceph_mon_client *monc); |
38 | ||
a5cbd5fc ID |
39 | static int decode_mon_info(void **p, void *end, bool msgr2, |
40 | struct ceph_entity_addr *addr) | |
41 | { | |
42 | void *mon_info_end; | |
43 | u32 struct_len; | |
44 | u8 struct_v; | |
45 | int ret; | |
46 | ||
47 | ret = ceph_start_decoding(p, end, 1, "mon_info_t", &struct_v, | |
48 | &struct_len); | |
49 | if (ret) | |
50 | return ret; | |
51 | ||
52 | mon_info_end = *p + struct_len; | |
53 | ceph_decode_skip_string(p, end, e_inval); /* skip mon name */ | |
54 | ret = ceph_decode_entity_addrvec(p, end, msgr2, addr); | |
55 | if (ret) | |
56 | return ret; | |
57 | ||
58 | *p = mon_info_end; | |
59 | return 0; | |
60 | ||
61 | e_inval: | |
62 | return -EINVAL; | |
63 | } | |
64 | ||
ba75bb98 SW |
65 | /* |
66 | * Decode a monmap blob (e.g., during mount). | |
a5cbd5fc ID |
67 | * |
68 | * Assume MonMap v3 (i.e. encoding with MONNAMES and MONENC). | |
ba75bb98 | 69 | */ |
a5cbd5fc | 70 | static struct ceph_monmap *ceph_monmap_decode(void **p, void *end, bool msgr2) |
ba75bb98 | 71 | { |
a5cbd5fc | 72 | struct ceph_monmap *monmap = NULL; |
ba75bb98 | 73 | struct ceph_fsid fsid; |
a5cbd5fc ID |
74 | u32 struct_len; |
75 | int blob_len; | |
76 | int num_mon; | |
77 | u8 struct_v; | |
78 | u32 epoch; | |
79 | int ret; | |
80 | int i; | |
81 | ||
82 | ceph_decode_32_safe(p, end, blob_len, e_inval); | |
83 | ceph_decode_need(p, end, blob_len, e_inval); | |
84 | ||
85 | ret = ceph_start_decoding(p, end, 6, "monmap", &struct_v, &struct_len); | |
86 | if (ret) | |
87 | goto fail; | |
88 | ||
89 | dout("%s struct_v %d\n", __func__, struct_v); | |
90 | ceph_decode_copy_safe(p, end, &fsid, sizeof(fsid), e_inval); | |
91 | ceph_decode_32_safe(p, end, epoch, e_inval); | |
92 | if (struct_v >= 6) { | |
93 | u32 feat_struct_len; | |
94 | u8 feat_struct_v; | |
4e7a5dcd | 95 | |
a5cbd5fc ID |
96 | *p += sizeof(struct ceph_timespec); /* skip last_changed */ |
97 | *p += sizeof(struct ceph_timespec); /* skip created */ | |
ba75bb98 | 98 | |
a5cbd5fc ID |
99 | ret = ceph_start_decoding(p, end, 1, "mon_feature_t", |
100 | &feat_struct_v, &feat_struct_len); | |
101 | if (ret) | |
102 | goto fail; | |
ba75bb98 | 103 | |
a5cbd5fc | 104 | *p += feat_struct_len; /* skip persistent_features */ |
ba75bb98 | 105 | |
a5cbd5fc ID |
106 | ret = ceph_start_decoding(p, end, 1, "mon_feature_t", |
107 | &feat_struct_v, &feat_struct_len); | |
108 | if (ret) | |
109 | goto fail; | |
ba75bb98 | 110 | |
a5cbd5fc ID |
111 | *p += feat_struct_len; /* skip optional_features */ |
112 | } | |
113 | ceph_decode_32_safe(p, end, num_mon, e_inval); | |
114 | ||
115 | dout("%s fsid %pU epoch %u num_mon %d\n", __func__, &fsid, epoch, | |
116 | num_mon); | |
7377324e | 117 | if (num_mon > CEPH_MAX_MON) |
a5cbd5fc ID |
118 | goto e_inval; |
119 | ||
120 | monmap = kmalloc(struct_size(monmap, mon_inst, num_mon), GFP_NOIO); | |
121 | if (!monmap) { | |
122 | ret = -ENOMEM; | |
123 | goto fail; | |
0bfb0f28 | 124 | } |
a5cbd5fc ID |
125 | monmap->fsid = fsid; |
126 | monmap->epoch = epoch; | |
127 | monmap->num_mon = num_mon; | |
128 | ||
129 | /* legacy_mon_addr map or mon_info map */ | |
130 | for (i = 0; i < num_mon; i++) { | |
131 | struct ceph_entity_inst *inst = &monmap->mon_inst[i]; | |
132 | ||
133 | ceph_decode_skip_string(p, end, e_inval); /* skip mon name */ | |
134 | inst->name.type = CEPH_ENTITY_TYPE_MON; | |
135 | inst->name.num = cpu_to_le64(i); | |
136 | ||
137 | if (struct_v >= 6) | |
138 | ret = decode_mon_info(p, end, msgr2, &inst->addr); | |
139 | else | |
140 | ret = ceph_decode_entity_addr(p, end, &inst->addr); | |
141 | if (ret) | |
142 | goto fail; | |
143 | ||
144 | dout("%s mon%d addr %s\n", __func__, i, | |
145 | ceph_pr_addr(&inst->addr)); | |
146 | } | |
147 | ||
148 | return monmap; | |
149 | ||
150 | e_inval: | |
151 | ret = -EINVAL; | |
152 | fail: | |
153 | kfree(monmap); | |
154 | return ERR_PTR(ret); | |
ba75bb98 SW |
155 | } |
156 | ||
157 | /* | |
158 | * return true if *addr is included in the monmap. | |
159 | */ | |
160 | int ceph_monmap_contains(struct ceph_monmap *m, struct ceph_entity_addr *addr) | |
161 | { | |
162 | int i; | |
163 | ||
313771e8 ID |
164 | for (i = 0; i < m->num_mon; i++) { |
165 | if (ceph_addr_equal_no_type(addr, &m->mon_inst[i].addr)) | |
ba75bb98 | 166 | return 1; |
313771e8 ID |
167 | } |
168 | ||
ba75bb98 SW |
169 | return 0; |
170 | } | |
171 | ||
5ce6e9db SW |
172 | /* |
173 | * Send an auth request. | |
174 | */ | |
175 | static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len) | |
176 | { | |
177 | monc->pending_auth = 1; | |
178 | monc->m_auth->front.iov_len = len; | |
179 | monc->m_auth->hdr.front_len = cpu_to_le32(len); | |
6740a845 | 180 | ceph_msg_revoke(monc->m_auth); |
5ce6e9db | 181 | ceph_msg_get(monc->m_auth); /* keep our ref */ |
67130934 | 182 | ceph_con_send(&monc->con, monc->m_auth); |
5ce6e9db SW |
183 | } |
184 | ||
ba75bb98 SW |
185 | /* |
186 | * Close monitor session, if any. | |
187 | */ | |
188 | static void __close_session(struct ceph_mon_client *monc) | |
189 | { | |
f6a2f5be | 190 | dout("__close_session closing mon%d\n", monc->cur_mon); |
6740a845 | 191 | ceph_msg_revoke(monc->m_auth); |
4f471e4a SW |
192 | ceph_msg_revoke_incoming(monc->m_auth_reply); |
193 | ceph_msg_revoke(monc->m_subscribe); | |
194 | ceph_msg_revoke_incoming(monc->m_subscribe_ack); | |
67130934 | 195 | ceph_con_close(&monc->con); |
0e04dc26 | 196 | |
f6a2f5be SW |
197 | monc->pending_auth = 0; |
198 | ceph_auth_reset(monc->auth); | |
ba75bb98 SW |
199 | } |
200 | ||
201 | /* | |
0e04dc26 ID |
202 | * Pick a new monitor at random and set cur_mon. If we are repicking |
203 | * (i.e. cur_mon is already set), be sure to pick a different one. | |
ba75bb98 | 204 | */ |
0e04dc26 | 205 | static void pick_new_mon(struct ceph_mon_client *monc) |
ba75bb98 | 206 | { |
0e04dc26 | 207 | int old_mon = monc->cur_mon; |
ba75bb98 | 208 | |
0e04dc26 | 209 | BUG_ON(monc->monmap->num_mon < 1); |
ba75bb98 | 210 | |
0e04dc26 ID |
211 | if (monc->monmap->num_mon == 1) { |
212 | monc->cur_mon = 0; | |
213 | } else { | |
214 | int max = monc->monmap->num_mon; | |
215 | int o = -1; | |
216 | int n; | |
217 | ||
218 | if (monc->cur_mon >= 0) { | |
219 | if (monc->cur_mon < monc->monmap->num_mon) | |
220 | o = monc->cur_mon; | |
221 | if (o >= 0) | |
222 | max--; | |
223 | } | |
4e7a5dcd | 224 | |
0e04dc26 ID |
225 | n = prandom_u32() % max; |
226 | if (o >= 0 && n >= o) | |
227 | n++; | |
8b9558aa | 228 | |
0e04dc26 | 229 | monc->cur_mon = n; |
ba75bb98 | 230 | } |
0e04dc26 ID |
231 | |
232 | dout("%s mon%d -> mon%d out of %d mons\n", __func__, old_mon, | |
233 | monc->cur_mon, monc->monmap->num_mon); | |
234 | } | |
235 | ||
236 | /* | |
237 | * Open a session with a new monitor. | |
238 | */ | |
239 | static void __open_session(struct ceph_mon_client *monc) | |
240 | { | |
241 | int ret; | |
242 | ||
243 | pick_new_mon(monc); | |
244 | ||
1752b50c | 245 | monc->hunting = true; |
168b9090 ID |
246 | if (monc->had_a_connection) { |
247 | monc->hunt_mult *= CEPH_MONC_HUNT_BACKOFF; | |
248 | if (monc->hunt_mult > CEPH_MONC_HUNT_MAX_MULT) | |
249 | monc->hunt_mult = CEPH_MONC_HUNT_MAX_MULT; | |
250 | } | |
251 | ||
0e04dc26 ID |
252 | monc->sub_renew_after = jiffies; /* i.e., expired */ |
253 | monc->sub_renew_sent = 0; | |
254 | ||
255 | dout("%s opening mon%d\n", __func__, monc->cur_mon); | |
256 | ceph_con_open(&monc->con, CEPH_ENTITY_TYPE_MON, monc->cur_mon, | |
257 | &monc->monmap->mon_inst[monc->cur_mon].addr); | |
258 | ||
259 | /* | |
260 | * send an initial keepalive to ensure our timestamp is valid | |
261 | * by the time we are in an OPENED state | |
262 | */ | |
263 | ceph_con_keepalive(&monc->con); | |
264 | ||
265 | /* initiate authentication handshake */ | |
266 | ret = ceph_auth_build_hello(monc->auth, | |
267 | monc->m_auth->front.iov_base, | |
268 | monc->m_auth->front_alloc_len); | |
269 | BUG_ON(ret <= 0); | |
270 | __send_prepared_auth_request(monc, ret); | |
ba75bb98 SW |
271 | } |
272 | ||
1752b50c ID |
273 | static void reopen_session(struct ceph_mon_client *monc) |
274 | { | |
275 | if (!monc->hunting) | |
276 | pr_info("mon%d %s session lost, hunting for new mon\n", | |
b726ec97 | 277 | monc->cur_mon, ceph_pr_addr(&monc->con.peer_addr)); |
1752b50c ID |
278 | |
279 | __close_session(monc); | |
280 | __open_session(monc); | |
281 | } | |
282 | ||
120a75ea YZ |
283 | void ceph_monc_reopen_session(struct ceph_mon_client *monc) |
284 | { | |
285 | mutex_lock(&monc->mutex); | |
286 | reopen_session(monc); | |
287 | mutex_unlock(&monc->mutex); | |
288 | } | |
289 | ||
facb9f6e ID |
290 | static void un_backoff(struct ceph_mon_client *monc) |
291 | { | |
292 | monc->hunt_mult /= 2; /* reduce by 50% */ | |
293 | if (monc->hunt_mult < 1) | |
294 | monc->hunt_mult = 1; | |
295 | dout("%s hunt_mult now %d\n", __func__, monc->hunt_mult); | |
296 | } | |
297 | ||
ba75bb98 SW |
298 | /* |
299 | * Reschedule delayed work timer. | |
300 | */ | |
301 | static void __schedule_delayed(struct ceph_mon_client *monc) | |
302 | { | |
8b9558aa | 303 | unsigned long delay; |
ba75bb98 | 304 | |
168b9090 ID |
305 | if (monc->hunting) |
306 | delay = CEPH_MONC_HUNT_INTERVAL * monc->hunt_mult; | |
307 | else | |
58d81b12 | 308 | delay = CEPH_MONC_PING_INTERVAL; |
168b9090 | 309 | |
8b9558aa | 310 | dout("__schedule_delayed after %lu\n", delay); |
bee3a37c ID |
311 | mod_delayed_work(system_wq, &monc->delayed_work, |
312 | round_jiffies_relative(delay)); | |
ba75bb98 SW |
313 | } |
314 | ||
82dcabad | 315 | const char *ceph_sub_str[] = { |
82dcabad ID |
316 | [CEPH_SUB_MONMAP] = "monmap", |
317 | [CEPH_SUB_OSDMAP] = "osdmap", | |
0cabbd94 YZ |
318 | [CEPH_SUB_FSMAP] = "fsmap.user", |
319 | [CEPH_SUB_MDSMAP] = "mdsmap", | |
82dcabad ID |
320 | }; |
321 | ||
ba75bb98 | 322 | /* |
82dcabad ID |
323 | * Send subscribe request for one or more maps, according to |
324 | * monc->subs. | |
ba75bb98 SW |
325 | */ |
326 | static void __send_subscribe(struct ceph_mon_client *monc) | |
327 | { | |
82dcabad ID |
328 | struct ceph_msg *msg = monc->m_subscribe; |
329 | void *p = msg->front.iov_base; | |
330 | void *const end = p + msg->front_alloc_len; | |
331 | int num = 0; | |
332 | int i; | |
333 | ||
334 | dout("%s sent %lu\n", __func__, monc->sub_renew_sent); | |
335 | ||
336 | BUG_ON(monc->cur_mon < 0); | |
337 | ||
338 | if (!monc->sub_renew_sent) | |
339 | monc->sub_renew_sent = jiffies | 1; /* never 0 */ | |
340 | ||
341 | msg->hdr.version = cpu_to_le16(2); | |
342 | ||
343 | for (i = 0; i < ARRAY_SIZE(monc->subs); i++) { | |
344 | if (monc->subs[i].want) | |
345 | num++; | |
346 | } | |
347 | BUG_ON(num < 1); /* monmap sub is always there */ | |
348 | ceph_encode_32(&p, num); | |
349 | for (i = 0; i < ARRAY_SIZE(monc->subs); i++) { | |
737cc81e ID |
350 | char buf[32]; |
351 | int len; | |
82dcabad ID |
352 | |
353 | if (!monc->subs[i].want) | |
354 | continue; | |
355 | ||
737cc81e ID |
356 | len = sprintf(buf, "%s", ceph_sub_str[i]); |
357 | if (i == CEPH_SUB_MDSMAP && | |
358 | monc->fs_cluster_id != CEPH_FS_CLUSTER_ID_NONE) | |
359 | len += sprintf(buf + len, ".%d", monc->fs_cluster_id); | |
360 | ||
361 | dout("%s %s start %llu flags 0x%x\n", __func__, buf, | |
82dcabad ID |
362 | le64_to_cpu(monc->subs[i].item.start), |
363 | monc->subs[i].item.flags); | |
737cc81e | 364 | ceph_encode_string(&p, end, buf, len); |
82dcabad ID |
365 | memcpy(p, &monc->subs[i].item, sizeof(monc->subs[i].item)); |
366 | p += sizeof(monc->subs[i].item); | |
ba75bb98 | 367 | } |
82dcabad | 368 | |
737cc81e | 369 | BUG_ON(p > end); |
82dcabad ID |
370 | msg->front.iov_len = p - msg->front.iov_base; |
371 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
372 | ceph_msg_revoke(msg); | |
373 | ceph_con_send(&monc->con, ceph_msg_get(msg)); | |
ba75bb98 SW |
374 | } |
375 | ||
376 | static void handle_subscribe_ack(struct ceph_mon_client *monc, | |
377 | struct ceph_msg *msg) | |
378 | { | |
95c96174 | 379 | unsigned int seconds; |
07bd10fb SW |
380 | struct ceph_mon_subscribe_ack *h = msg->front.iov_base; |
381 | ||
382 | if (msg->front.iov_len < sizeof(*h)) | |
383 | goto bad; | |
384 | seconds = le32_to_cpu(h->duration); | |
ba75bb98 | 385 | |
ba75bb98 | 386 | mutex_lock(&monc->mutex); |
82dcabad | 387 | if (monc->sub_renew_sent) { |
220abf5a ID |
388 | /* |
389 | * This is only needed for legacy (infernalis or older) | |
390 | * MONs -- see delayed_work(). | |
391 | */ | |
82dcabad ID |
392 | monc->sub_renew_after = monc->sub_renew_sent + |
393 | (seconds >> 1) * HZ - 1; | |
394 | dout("%s sent %lu duration %d renew after %lu\n", __func__, | |
395 | monc->sub_renew_sent, seconds, monc->sub_renew_after); | |
396 | monc->sub_renew_sent = 0; | |
397 | } else { | |
398 | dout("%s sent %lu renew after %lu, ignoring\n", __func__, | |
399 | monc->sub_renew_sent, monc->sub_renew_after); | |
400 | } | |
ba75bb98 SW |
401 | mutex_unlock(&monc->mutex); |
402 | return; | |
403 | bad: | |
404 | pr_err("got corrupt subscribe-ack msg\n"); | |
9ec7cab1 | 405 | ceph_msg_dump(msg); |
ba75bb98 SW |
406 | } |
407 | ||
408 | /* | |
82dcabad ID |
409 | * Register interest in a map |
410 | * | |
411 | * @sub: one of CEPH_SUB_* | |
412 | * @epoch: X for "every map since X", or 0 for "just the latest" | |
ba75bb98 | 413 | */ |
82dcabad ID |
414 | static bool __ceph_monc_want_map(struct ceph_mon_client *monc, int sub, |
415 | u32 epoch, bool continuous) | |
ba75bb98 | 416 | { |
82dcabad ID |
417 | __le64 start = cpu_to_le64(epoch); |
418 | u8 flags = !continuous ? CEPH_SUBSCRIBE_ONETIME : 0; | |
419 | ||
420 | dout("%s %s epoch %u continuous %d\n", __func__, ceph_sub_str[sub], | |
421 | epoch, continuous); | |
422 | ||
423 | if (monc->subs[sub].want && | |
424 | monc->subs[sub].item.start == start && | |
425 | monc->subs[sub].item.flags == flags) | |
426 | return false; | |
427 | ||
428 | monc->subs[sub].item.start = start; | |
429 | monc->subs[sub].item.flags = flags; | |
430 | monc->subs[sub].want = true; | |
431 | ||
432 | return true; | |
433 | } | |
434 | ||
435 | bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch, | |
436 | bool continuous) | |
437 | { | |
438 | bool need_request; | |
439 | ||
ba75bb98 | 440 | mutex_lock(&monc->mutex); |
82dcabad | 441 | need_request = __ceph_monc_want_map(monc, sub, epoch, continuous); |
ba75bb98 | 442 | mutex_unlock(&monc->mutex); |
82dcabad ID |
443 | |
444 | return need_request; | |
445 | } | |
446 | EXPORT_SYMBOL(ceph_monc_want_map); | |
447 | ||
448 | /* | |
449 | * Keep track of which maps we have | |
450 | * | |
451 | * @sub: one of CEPH_SUB_* | |
452 | */ | |
453 | static void __ceph_monc_got_map(struct ceph_mon_client *monc, int sub, | |
454 | u32 epoch) | |
455 | { | |
456 | dout("%s %s epoch %u\n", __func__, ceph_sub_str[sub], epoch); | |
457 | ||
458 | if (monc->subs[sub].want) { | |
459 | if (monc->subs[sub].item.flags & CEPH_SUBSCRIBE_ONETIME) | |
460 | monc->subs[sub].want = false; | |
461 | else | |
462 | monc->subs[sub].item.start = cpu_to_le64(epoch + 1); | |
463 | } | |
464 | ||
465 | monc->subs[sub].have = epoch; | |
ba75bb98 SW |
466 | } |
467 | ||
82dcabad | 468 | void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch) |
ba75bb98 SW |
469 | { |
470 | mutex_lock(&monc->mutex); | |
82dcabad | 471 | __ceph_monc_got_map(monc, sub, epoch); |
ba75bb98 | 472 | mutex_unlock(&monc->mutex); |
ba75bb98 | 473 | } |
82dcabad | 474 | EXPORT_SYMBOL(ceph_monc_got_map); |
ba75bb98 | 475 | |
42c1b124 ID |
476 | void ceph_monc_renew_subs(struct ceph_mon_client *monc) |
477 | { | |
478 | mutex_lock(&monc->mutex); | |
479 | __send_subscribe(monc); | |
480 | mutex_unlock(&monc->mutex); | |
481 | } | |
482 | EXPORT_SYMBOL(ceph_monc_renew_subs); | |
483 | ||
a319bf56 ID |
484 | /* |
485 | * Wait for an osdmap with a given epoch. | |
486 | * | |
487 | * @epoch: epoch to wait for | |
488 | * @timeout: in jiffies, 0 means "wait forever" | |
489 | */ | |
6044cde6 ID |
490 | int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch, |
491 | unsigned long timeout) | |
492 | { | |
493 | unsigned long started = jiffies; | |
216639dd | 494 | long ret; |
6044cde6 ID |
495 | |
496 | mutex_lock(&monc->mutex); | |
82dcabad | 497 | while (monc->subs[CEPH_SUB_OSDMAP].have < epoch) { |
6044cde6 ID |
498 | mutex_unlock(&monc->mutex); |
499 | ||
a319bf56 | 500 | if (timeout && time_after_eq(jiffies, started + timeout)) |
6044cde6 ID |
501 | return -ETIMEDOUT; |
502 | ||
503 | ret = wait_event_interruptible_timeout(monc->client->auth_wq, | |
82dcabad ID |
504 | monc->subs[CEPH_SUB_OSDMAP].have >= epoch, |
505 | ceph_timeout_jiffies(timeout)); | |
6044cde6 ID |
506 | if (ret < 0) |
507 | return ret; | |
508 | ||
509 | mutex_lock(&monc->mutex); | |
510 | } | |
511 | ||
512 | mutex_unlock(&monc->mutex); | |
513 | return 0; | |
514 | } | |
515 | EXPORT_SYMBOL(ceph_monc_wait_osdmap); | |
ba75bb98 | 516 | |
4e7a5dcd | 517 | /* |
82dcabad ID |
518 | * Open a session with a random monitor. Request monmap and osdmap, |
519 | * which are waited upon in __ceph_open_session(). | |
4e7a5dcd SW |
520 | */ |
521 | int ceph_monc_open_session(struct ceph_mon_client *monc) | |
ba75bb98 | 522 | { |
ba75bb98 | 523 | mutex_lock(&monc->mutex); |
82dcabad ID |
524 | __ceph_monc_want_map(monc, CEPH_SUB_MONMAP, 0, true); |
525 | __ceph_monc_want_map(monc, CEPH_SUB_OSDMAP, 0, false); | |
4e7a5dcd | 526 | __open_session(monc); |
ba75bb98 SW |
527 | __schedule_delayed(monc); |
528 | mutex_unlock(&monc->mutex); | |
529 | return 0; | |
530 | } | |
3d14c5d2 | 531 | EXPORT_SYMBOL(ceph_monc_open_session); |
ba75bb98 | 532 | |
0743304d SW |
533 | static void ceph_monc_handle_map(struct ceph_mon_client *monc, |
534 | struct ceph_msg *msg) | |
4e7a5dcd SW |
535 | { |
536 | struct ceph_client *client = monc->client; | |
4d8b8fb4 | 537 | struct ceph_monmap *monmap; |
4e7a5dcd SW |
538 | void *p, *end; |
539 | ||
540 | mutex_lock(&monc->mutex); | |
541 | ||
542 | dout("handle_monmap\n"); | |
543 | p = msg->front.iov_base; | |
544 | end = p + msg->front.iov_len; | |
545 | ||
a5cbd5fc | 546 | monmap = ceph_monmap_decode(&p, end, false); |
4e7a5dcd SW |
547 | if (IS_ERR(monmap)) { |
548 | pr_err("problem decoding monmap, %d\n", | |
549 | (int)PTR_ERR(monmap)); | |
0bfb0f28 | 550 | ceph_msg_dump(msg); |
d4a780ce | 551 | goto out; |
4e7a5dcd | 552 | } |
0743304d | 553 | |
4d8b8fb4 | 554 | if (ceph_check_fsid(client, &monmap->fsid) < 0) { |
4e7a5dcd | 555 | kfree(monmap); |
d4a780ce | 556 | goto out; |
4e7a5dcd SW |
557 | } |
558 | ||
4d8b8fb4 ID |
559 | kfree(monc->monmap); |
560 | monc->monmap = monmap; | |
4e7a5dcd | 561 | |
82dcabad | 562 | __ceph_monc_got_map(monc, CEPH_SUB_MONMAP, monc->monmap->epoch); |
02ac956c | 563 | client->have_fsid = true; |
d1c338a5 | 564 | |
d4a780ce | 565 | out: |
4e7a5dcd | 566 | mutex_unlock(&monc->mutex); |
03066f23 | 567 | wake_up_all(&client->auth_wq); |
4e7a5dcd SW |
568 | } |
569 | ||
ba75bb98 | 570 | /* |
7a6fdeb2 | 571 | * generic requests (currently statfs, mon_get_version) |
ba75bb98 | 572 | */ |
fcd00b68 | 573 | DEFINE_RB_FUNCS(generic_request, struct ceph_mon_generic_request, tid, node) |
85ff03f6 | 574 | |
f8c76f6f | 575 | static void release_generic_request(struct kref *kref) |
3143edd3 | 576 | { |
f8c76f6f YS |
577 | struct ceph_mon_generic_request *req = |
578 | container_of(kref, struct ceph_mon_generic_request, kref); | |
3143edd3 | 579 | |
d0b19705 ID |
580 | dout("%s greq %p request %p reply %p\n", __func__, req, req->request, |
581 | req->reply); | |
582 | WARN_ON(!RB_EMPTY_NODE(&req->node)); | |
583 | ||
3143edd3 SW |
584 | if (req->reply) |
585 | ceph_msg_put(req->reply); | |
586 | if (req->request) | |
587 | ceph_msg_put(req->request); | |
20547567 YS |
588 | |
589 | kfree(req); | |
3143edd3 SW |
590 | } |
591 | ||
f8c76f6f | 592 | static void put_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 | 593 | { |
d0b19705 ID |
594 | if (req) |
595 | kref_put(&req->kref, release_generic_request); | |
3143edd3 SW |
596 | } |
597 | ||
f8c76f6f | 598 | static void get_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 SW |
599 | { |
600 | kref_get(&req->kref); | |
601 | } | |
602 | ||
d0b19705 ID |
603 | static struct ceph_mon_generic_request * |
604 | alloc_generic_request(struct ceph_mon_client *monc, gfp_t gfp) | |
605 | { | |
606 | struct ceph_mon_generic_request *req; | |
607 | ||
608 | req = kzalloc(sizeof(*req), gfp); | |
609 | if (!req) | |
610 | return NULL; | |
611 | ||
612 | req->monc = monc; | |
613 | kref_init(&req->kref); | |
614 | RB_CLEAR_NODE(&req->node); | |
615 | init_completion(&req->completion); | |
616 | ||
617 | dout("%s greq %p\n", __func__, req); | |
618 | return req; | |
619 | } | |
620 | ||
621 | static void register_generic_request(struct ceph_mon_generic_request *req) | |
622 | { | |
623 | struct ceph_mon_client *monc = req->monc; | |
624 | ||
625 | WARN_ON(req->tid); | |
626 | ||
627 | get_generic_request(req); | |
628 | req->tid = ++monc->last_tid; | |
629 | insert_generic_request(&monc->generic_request_tree, req); | |
630 | } | |
631 | ||
632 | static void send_generic_request(struct ceph_mon_client *monc, | |
633 | struct ceph_mon_generic_request *req) | |
634 | { | |
635 | WARN_ON(!req->tid); | |
636 | ||
637 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
638 | req->request->hdr.tid = cpu_to_le64(req->tid); | |
639 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); | |
640 | } | |
641 | ||
642 | static void __finish_generic_request(struct ceph_mon_generic_request *req) | |
643 | { | |
644 | struct ceph_mon_client *monc = req->monc; | |
645 | ||
646 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
647 | erase_generic_request(&monc->generic_request_tree, req); | |
648 | ||
649 | ceph_msg_revoke(req->request); | |
650 | ceph_msg_revoke_incoming(req->reply); | |
651 | } | |
652 | ||
653 | static void finish_generic_request(struct ceph_mon_generic_request *req) | |
654 | { | |
655 | __finish_generic_request(req); | |
656 | put_generic_request(req); | |
657 | } | |
658 | ||
659 | static void complete_generic_request(struct ceph_mon_generic_request *req) | |
660 | { | |
661 | if (req->complete_cb) | |
662 | req->complete_cb(req); | |
663 | else | |
664 | complete_all(&req->completion); | |
665 | put_generic_request(req); | |
666 | } | |
667 | ||
f52ec33c | 668 | static void cancel_generic_request(struct ceph_mon_generic_request *req) |
d0b19705 ID |
669 | { |
670 | struct ceph_mon_client *monc = req->monc; | |
671 | struct ceph_mon_generic_request *lookup_req; | |
672 | ||
673 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
674 | ||
675 | mutex_lock(&monc->mutex); | |
676 | lookup_req = lookup_generic_request(&monc->generic_request_tree, | |
677 | req->tid); | |
678 | if (lookup_req) { | |
679 | WARN_ON(lookup_req != req); | |
680 | finish_generic_request(req); | |
681 | } | |
682 | ||
683 | mutex_unlock(&monc->mutex); | |
684 | } | |
685 | ||
686 | static int wait_generic_request(struct ceph_mon_generic_request *req) | |
687 | { | |
688 | int ret; | |
689 | ||
690 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
691 | ret = wait_for_completion_interruptible(&req->completion); | |
692 | if (ret) | |
693 | cancel_generic_request(req); | |
694 | else | |
695 | ret = req->result; /* completed */ | |
696 | ||
697 | return ret; | |
698 | } | |
699 | ||
f8c76f6f | 700 | static struct ceph_msg *get_generic_reply(struct ceph_connection *con, |
3143edd3 SW |
701 | struct ceph_msg_header *hdr, |
702 | int *skip) | |
703 | { | |
704 | struct ceph_mon_client *monc = con->private; | |
f8c76f6f | 705 | struct ceph_mon_generic_request *req; |
3143edd3 SW |
706 | u64 tid = le64_to_cpu(hdr->tid); |
707 | struct ceph_msg *m; | |
708 | ||
709 | mutex_lock(&monc->mutex); | |
fcd00b68 | 710 | req = lookup_generic_request(&monc->generic_request_tree, tid); |
3143edd3 | 711 | if (!req) { |
f8c76f6f | 712 | dout("get_generic_reply %lld dne\n", tid); |
3143edd3 SW |
713 | *skip = 1; |
714 | m = NULL; | |
715 | } else { | |
f8c76f6f | 716 | dout("get_generic_reply %lld got %p\n", tid, req->reply); |
1c20f2d2 | 717 | *skip = 0; |
3143edd3 SW |
718 | m = ceph_msg_get(req->reply); |
719 | /* | |
720 | * we don't need to track the connection reading into | |
721 | * this reply because we only have one open connection | |
722 | * at a time, ever. | |
723 | */ | |
724 | } | |
725 | mutex_unlock(&monc->mutex); | |
726 | return m; | |
727 | } | |
728 | ||
e56fa10e YS |
729 | /* |
730 | * statfs | |
731 | */ | |
ba75bb98 SW |
732 | static void handle_statfs_reply(struct ceph_mon_client *monc, |
733 | struct ceph_msg *msg) | |
734 | { | |
f8c76f6f | 735 | struct ceph_mon_generic_request *req; |
ba75bb98 | 736 | struct ceph_mon_statfs_reply *reply = msg->front.iov_base; |
3143edd3 | 737 | u64 tid = le64_to_cpu(msg->hdr.tid); |
ba75bb98 | 738 | |
d0b19705 ID |
739 | dout("%s msg %p tid %llu\n", __func__, msg, tid); |
740 | ||
ba75bb98 SW |
741 | if (msg->front.iov_len != sizeof(*reply)) |
742 | goto bad; | |
ba75bb98 SW |
743 | |
744 | mutex_lock(&monc->mutex); | |
fcd00b68 | 745 | req = lookup_generic_request(&monc->generic_request_tree, tid); |
d0b19705 ID |
746 | if (!req) { |
747 | mutex_unlock(&monc->mutex); | |
748 | return; | |
ba75bb98 | 749 | } |
d0b19705 ID |
750 | |
751 | req->result = 0; | |
752 | *req->u.st = reply->st; /* struct */ | |
753 | __finish_generic_request(req); | |
ba75bb98 | 754 | mutex_unlock(&monc->mutex); |
d0b19705 ID |
755 | |
756 | complete_generic_request(req); | |
ba75bb98 SW |
757 | return; |
758 | ||
759 | bad: | |
7a6fdeb2 | 760 | pr_err("corrupt statfs reply, tid %llu\n", tid); |
9ec7cab1 | 761 | ceph_msg_dump(msg); |
ba75bb98 SW |
762 | } |
763 | ||
764 | /* | |
3143edd3 | 765 | * Do a synchronous statfs(). |
ba75bb98 | 766 | */ |
06d74376 DF |
767 | int ceph_monc_do_statfs(struct ceph_mon_client *monc, u64 data_pool, |
768 | struct ceph_statfs *buf) | |
ba75bb98 | 769 | { |
f8c76f6f | 770 | struct ceph_mon_generic_request *req; |
ba75bb98 | 771 | struct ceph_mon_statfs *h; |
d0b19705 | 772 | int ret = -ENOMEM; |
3143edd3 | 773 | |
d0b19705 | 774 | req = alloc_generic_request(monc, GFP_NOFS); |
3143edd3 | 775 | if (!req) |
d0b19705 | 776 | goto out; |
ba75bb98 | 777 | |
b61c2763 SW |
778 | req->request = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), GFP_NOFS, |
779 | true); | |
a79832f2 | 780 | if (!req->request) |
3143edd3 | 781 | goto out; |
d0b19705 ID |
782 | |
783 | req->reply = ceph_msg_new(CEPH_MSG_STATFS_REPLY, 64, GFP_NOFS, true); | |
a79832f2 | 784 | if (!req->reply) |
3143edd3 | 785 | goto out; |
3143edd3 | 786 | |
d0b19705 | 787 | req->u.st = buf; |
06d74376 | 788 | req->request->hdr.version = cpu_to_le16(2); |
d0b19705 ID |
789 | |
790 | mutex_lock(&monc->mutex); | |
791 | register_generic_request(req); | |
3143edd3 SW |
792 | /* fill out request */ |
793 | h = req->request->front.iov_base; | |
13e38c8a SW |
794 | h->monhdr.have_version = 0; |
795 | h->monhdr.session_mon = cpu_to_le16(-1); | |
796 | h->monhdr.session_mon_tid = 0; | |
ba75bb98 | 797 | h->fsid = monc->monmap->fsid; |
06d74376 DF |
798 | h->contains_data_pool = (data_pool != CEPH_NOPOOL); |
799 | h->data_pool = cpu_to_le64(data_pool); | |
d0b19705 ID |
800 | send_generic_request(monc, req); |
801 | mutex_unlock(&monc->mutex); | |
ba75bb98 | 802 | |
d0b19705 | 803 | ret = wait_generic_request(req); |
e56fa10e | 804 | out: |
f646912d | 805 | put_generic_request(req); |
d0b19705 | 806 | return ret; |
e56fa10e | 807 | } |
3d14c5d2 | 808 | EXPORT_SYMBOL(ceph_monc_do_statfs); |
e56fa10e | 809 | |
513a8243 ID |
810 | static void handle_get_version_reply(struct ceph_mon_client *monc, |
811 | struct ceph_msg *msg) | |
812 | { | |
813 | struct ceph_mon_generic_request *req; | |
814 | u64 tid = le64_to_cpu(msg->hdr.tid); | |
815 | void *p = msg->front.iov_base; | |
816 | void *end = p + msg->front_alloc_len; | |
817 | u64 handle; | |
818 | ||
d0b19705 | 819 | dout("%s msg %p tid %llu\n", __func__, msg, tid); |
513a8243 ID |
820 | |
821 | ceph_decode_need(&p, end, 2*sizeof(u64), bad); | |
822 | handle = ceph_decode_64(&p); | |
823 | if (tid != 0 && tid != handle) | |
824 | goto bad; | |
825 | ||
826 | mutex_lock(&monc->mutex); | |
fcd00b68 | 827 | req = lookup_generic_request(&monc->generic_request_tree, handle); |
d0b19705 ID |
828 | if (!req) { |
829 | mutex_unlock(&monc->mutex); | |
830 | return; | |
513a8243 | 831 | } |
d0b19705 ID |
832 | |
833 | req->result = 0; | |
834 | req->u.newest = ceph_decode_64(&p); | |
835 | __finish_generic_request(req); | |
513a8243 | 836 | mutex_unlock(&monc->mutex); |
513a8243 | 837 | |
d0b19705 | 838 | complete_generic_request(req); |
513a8243 | 839 | return; |
d0b19705 | 840 | |
513a8243 | 841 | bad: |
7a6fdeb2 | 842 | pr_err("corrupt mon_get_version reply, tid %llu\n", tid); |
513a8243 ID |
843 | ceph_msg_dump(msg); |
844 | } | |
845 | ||
d0b19705 ID |
846 | static struct ceph_mon_generic_request * |
847 | __ceph_monc_get_version(struct ceph_mon_client *monc, const char *what, | |
848 | ceph_monc_callback_t cb, u64 private_data) | |
513a8243 ID |
849 | { |
850 | struct ceph_mon_generic_request *req; | |
513a8243 | 851 | |
d0b19705 | 852 | req = alloc_generic_request(monc, GFP_NOIO); |
513a8243 | 853 | if (!req) |
d0b19705 | 854 | goto err_put_req; |
513a8243 ID |
855 | |
856 | req->request = ceph_msg_new(CEPH_MSG_MON_GET_VERSION, | |
857 | sizeof(u64) + sizeof(u32) + strlen(what), | |
d0b19705 ID |
858 | GFP_NOIO, true); |
859 | if (!req->request) | |
860 | goto err_put_req; | |
513a8243 | 861 | |
d0b19705 ID |
862 | req->reply = ceph_msg_new(CEPH_MSG_MON_GET_VERSION_REPLY, 32, GFP_NOIO, |
863 | true); | |
864 | if (!req->reply) | |
865 | goto err_put_req; | |
513a8243 | 866 | |
d0b19705 ID |
867 | req->complete_cb = cb; |
868 | req->private_data = private_data; | |
513a8243 | 869 | |
513a8243 | 870 | mutex_lock(&monc->mutex); |
d0b19705 ID |
871 | register_generic_request(req); |
872 | { | |
873 | void *p = req->request->front.iov_base; | |
874 | void *const end = p + req->request->front_alloc_len; | |
875 | ||
876 | ceph_encode_64(&p, req->tid); /* handle */ | |
877 | ceph_encode_string(&p, end, what, strlen(what)); | |
878 | WARN_ON(p != end); | |
879 | } | |
880 | send_generic_request(monc, req); | |
881 | mutex_unlock(&monc->mutex); | |
513a8243 | 882 | |
d0b19705 | 883 | return req; |
513a8243 | 884 | |
d0b19705 | 885 | err_put_req: |
f646912d | 886 | put_generic_request(req); |
d0b19705 | 887 | return ERR_PTR(-ENOMEM); |
513a8243 | 888 | } |
d0b19705 ID |
889 | |
890 | /* | |
891 | * Send MMonGetVersion and wait for the reply. | |
892 | * | |
893 | * @what: one of "mdsmap", "osdmap" or "monmap" | |
894 | */ | |
895 | int ceph_monc_get_version(struct ceph_mon_client *monc, const char *what, | |
896 | u64 *newest) | |
897 | { | |
898 | struct ceph_mon_generic_request *req; | |
899 | int ret; | |
900 | ||
901 | req = __ceph_monc_get_version(monc, what, NULL, 0); | |
902 | if (IS_ERR(req)) | |
903 | return PTR_ERR(req); | |
904 | ||
905 | ret = wait_generic_request(req); | |
906 | if (!ret) | |
907 | *newest = req->u.newest; | |
908 | ||
909 | put_generic_request(req); | |
910 | return ret; | |
911 | } | |
912 | EXPORT_SYMBOL(ceph_monc_get_version); | |
913 | ||
914 | /* | |
915 | * Send MMonGetVersion, | |
916 | * | |
917 | * @what: one of "mdsmap", "osdmap" or "monmap" | |
918 | */ | |
919 | int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what, | |
920 | ceph_monc_callback_t cb, u64 private_data) | |
921 | { | |
922 | struct ceph_mon_generic_request *req; | |
923 | ||
924 | req = __ceph_monc_get_version(monc, what, cb, private_data); | |
925 | if (IS_ERR(req)) | |
926 | return PTR_ERR(req); | |
927 | ||
928 | put_generic_request(req); | |
929 | return 0; | |
930 | } | |
931 | EXPORT_SYMBOL(ceph_monc_get_version_async); | |
513a8243 | 932 | |
6305a3b4 DF |
933 | static void handle_command_ack(struct ceph_mon_client *monc, |
934 | struct ceph_msg *msg) | |
935 | { | |
936 | struct ceph_mon_generic_request *req; | |
937 | void *p = msg->front.iov_base; | |
938 | void *const end = p + msg->front_alloc_len; | |
939 | u64 tid = le64_to_cpu(msg->hdr.tid); | |
940 | ||
941 | dout("%s msg %p tid %llu\n", __func__, msg, tid); | |
942 | ||
943 | ceph_decode_need(&p, end, sizeof(struct ceph_mon_request_header) + | |
944 | sizeof(u32), bad); | |
945 | p += sizeof(struct ceph_mon_request_header); | |
946 | ||
947 | mutex_lock(&monc->mutex); | |
948 | req = lookup_generic_request(&monc->generic_request_tree, tid); | |
949 | if (!req) { | |
950 | mutex_unlock(&monc->mutex); | |
951 | return; | |
952 | } | |
953 | ||
954 | req->result = ceph_decode_32(&p); | |
955 | __finish_generic_request(req); | |
956 | mutex_unlock(&monc->mutex); | |
957 | ||
958 | complete_generic_request(req); | |
959 | return; | |
960 | ||
961 | bad: | |
962 | pr_err("corrupt mon_command ack, tid %llu\n", tid); | |
963 | ceph_msg_dump(msg); | |
964 | } | |
965 | ||
1b05fae7 ID |
966 | static __printf(2, 0) |
967 | int do_mon_command_vargs(struct ceph_mon_client *monc, const char *fmt, | |
968 | va_list ap) | |
6305a3b4 DF |
969 | { |
970 | struct ceph_mon_generic_request *req; | |
971 | struct ceph_mon_command *h; | |
972 | int ret = -ENOMEM; | |
973 | int len; | |
974 | ||
975 | req = alloc_generic_request(monc, GFP_NOIO); | |
976 | if (!req) | |
977 | goto out; | |
978 | ||
979 | req->request = ceph_msg_new(CEPH_MSG_MON_COMMAND, 256, GFP_NOIO, true); | |
980 | if (!req->request) | |
981 | goto out; | |
982 | ||
983 | req->reply = ceph_msg_new(CEPH_MSG_MON_COMMAND_ACK, 512, GFP_NOIO, | |
984 | true); | |
985 | if (!req->reply) | |
986 | goto out; | |
987 | ||
988 | mutex_lock(&monc->mutex); | |
989 | register_generic_request(req); | |
990 | h = req->request->front.iov_base; | |
991 | h->monhdr.have_version = 0; | |
992 | h->monhdr.session_mon = cpu_to_le16(-1); | |
993 | h->monhdr.session_mon_tid = 0; | |
994 | h->fsid = monc->monmap->fsid; | |
995 | h->num_strs = cpu_to_le32(1); | |
1b05fae7 | 996 | len = vsprintf(h->str, fmt, ap); |
6305a3b4 DF |
997 | h->str_len = cpu_to_le32(len); |
998 | send_generic_request(monc, req); | |
999 | mutex_unlock(&monc->mutex); | |
1000 | ||
1001 | ret = wait_generic_request(req); | |
1002 | out: | |
1003 | put_generic_request(req); | |
1004 | return ret; | |
1005 | } | |
1b05fae7 ID |
1006 | |
1007 | static __printf(2, 3) | |
1008 | int do_mon_command(struct ceph_mon_client *monc, const char *fmt, ...) | |
1009 | { | |
1010 | va_list ap; | |
1011 | int ret; | |
1012 | ||
1013 | va_start(ap, fmt); | |
1014 | ret = do_mon_command_vargs(monc, fmt, ap); | |
1015 | va_end(ap); | |
1016 | return ret; | |
1017 | } | |
1018 | ||
1019 | int ceph_monc_blocklist_add(struct ceph_mon_client *monc, | |
1020 | struct ceph_entity_addr *client_addr) | |
1021 | { | |
1022 | int ret; | |
1023 | ||
1024 | ret = do_mon_command(monc, | |
1025 | "{ \"prefix\": \"osd blocklist\", \ | |
1026 | \"blocklistop\": \"add\", \ | |
1027 | \"addr\": \"%pISpc/%u\" }", | |
1028 | &client_addr->in_addr, | |
1029 | le32_to_cpu(client_addr->nonce)); | |
1030 | if (ret == -EINVAL) { | |
1031 | /* | |
1032 | * The monitor returns EINVAL on an unrecognized command. | |
1033 | * Try the legacy command -- it is exactly the same except | |
1034 | * for the name. | |
1035 | */ | |
1036 | ret = do_mon_command(monc, | |
1037 | "{ \"prefix\": \"osd blacklist\", \ | |
1038 | \"blacklistop\": \"add\", \ | |
1039 | \"addr\": \"%pISpc/%u\" }", | |
1040 | &client_addr->in_addr, | |
1041 | le32_to_cpu(client_addr->nonce)); | |
1042 | } | |
1043 | if (ret) | |
1044 | return ret; | |
1045 | ||
1046 | /* | |
1047 | * Make sure we have the osdmap that includes the blocklist | |
1048 | * entry. This is needed to ensure that the OSDs pick up the | |
1049 | * new blocklist before processing any future requests from | |
1050 | * this client. | |
1051 | */ | |
1052 | return ceph_wait_for_latest_osdmap(monc->client, 0); | |
1053 | } | |
0b98acd6 | 1054 | EXPORT_SYMBOL(ceph_monc_blocklist_add); |
6305a3b4 | 1055 | |
ba75bb98 | 1056 | /* |
e56fa10e | 1057 | * Resend pending generic requests. |
ba75bb98 | 1058 | */ |
f8c76f6f | 1059 | static void __resend_generic_request(struct ceph_mon_client *monc) |
ba75bb98 | 1060 | { |
f8c76f6f | 1061 | struct ceph_mon_generic_request *req; |
85ff03f6 | 1062 | struct rb_node *p; |
ba75bb98 | 1063 | |
f8c76f6f YS |
1064 | for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) { |
1065 | req = rb_entry(p, struct ceph_mon_generic_request, node); | |
6740a845 | 1066 | ceph_msg_revoke(req->request); |
4f471e4a | 1067 | ceph_msg_revoke_incoming(req->reply); |
67130934 | 1068 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
ba75bb98 SW |
1069 | } |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | * Delayed work. If we haven't mounted yet, retry. Otherwise, | |
1074 | * renew/retry subscription as needed (in case it is timing out, or we | |
1075 | * got an ENOMEM). And keep the monitor connection alive. | |
1076 | */ | |
1077 | static void delayed_work(struct work_struct *work) | |
1078 | { | |
1079 | struct ceph_mon_client *monc = | |
1080 | container_of(work, struct ceph_mon_client, delayed_work.work); | |
1081 | ||
1082 | dout("monc delayed_work\n"); | |
1083 | mutex_lock(&monc->mutex); | |
4e7a5dcd | 1084 | if (monc->hunting) { |
1752b50c ID |
1085 | dout("%s continuing hunt\n", __func__); |
1086 | reopen_session(monc); | |
ba75bb98 | 1087 | } else { |
8b9558aa YZ |
1088 | int is_auth = ceph_auth_is_authenticated(monc->auth); |
1089 | if (ceph_con_keepalive_expired(&monc->con, | |
58d81b12 | 1090 | CEPH_MONC_PING_TIMEOUT)) { |
8b9558aa YZ |
1091 | dout("monc keepalive timeout\n"); |
1092 | is_auth = 0; | |
1752b50c | 1093 | reopen_session(monc); |
8b9558aa | 1094 | } |
9bd2e6f8 | 1095 | |
8b9558aa YZ |
1096 | if (!monc->hunting) { |
1097 | ceph_con_keepalive(&monc->con); | |
1098 | __validate_auth(monc); | |
facb9f6e | 1099 | un_backoff(monc); |
8b9558aa | 1100 | } |
9bd2e6f8 | 1101 | |
220abf5a ID |
1102 | if (is_auth && |
1103 | !(monc->con.peer_features & CEPH_FEATURE_MON_STATEFUL_SUB)) { | |
82dcabad ID |
1104 | unsigned long now = jiffies; |
1105 | ||
1106 | dout("%s renew subs? now %lu renew after %lu\n", | |
1107 | __func__, now, monc->sub_renew_after); | |
1108 | if (time_after_eq(now, monc->sub_renew_after)) | |
1109 | __send_subscribe(monc); | |
1110 | } | |
ba75bb98 | 1111 | } |
ba75bb98 SW |
1112 | __schedule_delayed(monc); |
1113 | mutex_unlock(&monc->mutex); | |
1114 | } | |
1115 | ||
6b805185 SW |
1116 | /* |
1117 | * On startup, we build a temporary monmap populated with the IPs | |
1118 | * provided by mount(2). | |
1119 | */ | |
1120 | static int build_initial_monmap(struct ceph_mon_client *monc) | |
1121 | { | |
3d14c5d2 YS |
1122 | struct ceph_options *opt = monc->client->options; |
1123 | struct ceph_entity_addr *mon_addr = opt->mon_addr; | |
1124 | int num_mon = opt->num_mon; | |
6b805185 SW |
1125 | int i; |
1126 | ||
1127 | /* build initial monmap */ | |
acafe7e3 | 1128 | monc->monmap = kzalloc(struct_size(monc->monmap, mon_inst, num_mon), |
6b805185 SW |
1129 | GFP_KERNEL); |
1130 | if (!monc->monmap) | |
1131 | return -ENOMEM; | |
1132 | for (i = 0; i < num_mon; i++) { | |
1133 | monc->monmap->mon_inst[i].addr = mon_addr[i]; | |
6b805185 SW |
1134 | monc->monmap->mon_inst[i].addr.nonce = 0; |
1135 | monc->monmap->mon_inst[i].name.type = | |
1136 | CEPH_ENTITY_TYPE_MON; | |
1137 | monc->monmap->mon_inst[i].name.num = cpu_to_le64(i); | |
1138 | } | |
1139 | monc->monmap->num_mon = num_mon; | |
6b805185 SW |
1140 | return 0; |
1141 | } | |
1142 | ||
ba75bb98 SW |
1143 | int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl) |
1144 | { | |
1145 | int err = 0; | |
1146 | ||
1147 | dout("init\n"); | |
1148 | memset(monc, 0, sizeof(*monc)); | |
1149 | monc->client = cl; | |
1150 | monc->monmap = NULL; | |
1151 | mutex_init(&monc->mutex); | |
1152 | ||
6b805185 SW |
1153 | err = build_initial_monmap(monc); |
1154 | if (err) | |
1155 | goto out; | |
1156 | ||
f6a2f5be | 1157 | /* connection */ |
4e7a5dcd | 1158 | /* authentication */ |
3d14c5d2 | 1159 | monc->auth = ceph_auth_init(cl->options->name, |
8323c3aa | 1160 | cl->options->key); |
49d9224c NW |
1161 | if (IS_ERR(monc->auth)) { |
1162 | err = PTR_ERR(monc->auth); | |
67130934 | 1163 | goto out_monmap; |
49d9224c | 1164 | } |
4e7a5dcd SW |
1165 | monc->auth->want_keys = |
1166 | CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON | | |
1167 | CEPH_ENTITY_TYPE_OSD | CEPH_ENTITY_TYPE_MDS; | |
1168 | ||
240ed68e | 1169 | /* msgs */ |
a79832f2 | 1170 | err = -ENOMEM; |
7c315c55 | 1171 | monc->m_subscribe_ack = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE_ACK, |
34d23762 | 1172 | sizeof(struct ceph_mon_subscribe_ack), |
5418d0a2 | 1173 | GFP_KERNEL, true); |
a79832f2 | 1174 | if (!monc->m_subscribe_ack) |
49d9224c | 1175 | goto out_auth; |
6694d6b9 | 1176 | |
5418d0a2 ID |
1177 | monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 128, |
1178 | GFP_KERNEL, true); | |
240ed68e SW |
1179 | if (!monc->m_subscribe) |
1180 | goto out_subscribe_ack; | |
1181 | ||
5418d0a2 ID |
1182 | monc->m_auth_reply = ceph_msg_new(CEPH_MSG_AUTH_REPLY, 4096, |
1183 | GFP_KERNEL, true); | |
a79832f2 | 1184 | if (!monc->m_auth_reply) |
240ed68e | 1185 | goto out_subscribe; |
4e7a5dcd | 1186 | |
5418d0a2 | 1187 | monc->m_auth = ceph_msg_new(CEPH_MSG_AUTH, 4096, GFP_KERNEL, true); |
9bd2e6f8 | 1188 | monc->pending_auth = 0; |
a79832f2 | 1189 | if (!monc->m_auth) |
6694d6b9 | 1190 | goto out_auth_reply; |
ba75bb98 | 1191 | |
735a72ef SW |
1192 | ceph_con_init(&monc->con, monc, &mon_con_ops, |
1193 | &monc->client->msgr); | |
1194 | ||
ba75bb98 | 1195 | monc->cur_mon = -1; |
168b9090 ID |
1196 | monc->had_a_connection = false; |
1197 | monc->hunt_mult = 1; | |
ba75bb98 SW |
1198 | |
1199 | INIT_DELAYED_WORK(&monc->delayed_work, delayed_work); | |
f8c76f6f | 1200 | monc->generic_request_tree = RB_ROOT; |
ba75bb98 SW |
1201 | monc->last_tid = 0; |
1202 | ||
737cc81e ID |
1203 | monc->fs_cluster_id = CEPH_FS_CLUSTER_ID_NONE; |
1204 | ||
4e7a5dcd SW |
1205 | return 0; |
1206 | ||
6694d6b9 SW |
1207 | out_auth_reply: |
1208 | ceph_msg_put(monc->m_auth_reply); | |
240ed68e SW |
1209 | out_subscribe: |
1210 | ceph_msg_put(monc->m_subscribe); | |
7c315c55 SW |
1211 | out_subscribe_ack: |
1212 | ceph_msg_put(monc->m_subscribe_ack); | |
49d9224c NW |
1213 | out_auth: |
1214 | ceph_auth_destroy(monc->auth); | |
4e7a5dcd SW |
1215 | out_monmap: |
1216 | kfree(monc->monmap); | |
ba75bb98 SW |
1217 | out: |
1218 | return err; | |
1219 | } | |
3d14c5d2 | 1220 | EXPORT_SYMBOL(ceph_monc_init); |
ba75bb98 SW |
1221 | |
1222 | void ceph_monc_stop(struct ceph_mon_client *monc) | |
1223 | { | |
1224 | dout("stop\n"); | |
1225 | cancel_delayed_work_sync(&monc->delayed_work); | |
1226 | ||
1227 | mutex_lock(&monc->mutex); | |
1228 | __close_session(monc); | |
0e04dc26 | 1229 | monc->cur_mon = -1; |
ba75bb98 SW |
1230 | mutex_unlock(&monc->mutex); |
1231 | ||
f3dea7ed SW |
1232 | /* |
1233 | * flush msgr queue before we destroy ourselves to ensure that: | |
1234 | * - any work that references our embedded con is finished. | |
1235 | * - any osd_client or other work that may reference an authorizer | |
1236 | * finishes before we shut down the auth subsystem. | |
1237 | */ | |
1238 | ceph_msgr_flush(); | |
1239 | ||
4e7a5dcd SW |
1240 | ceph_auth_destroy(monc->auth); |
1241 | ||
d0b19705 ID |
1242 | WARN_ON(!RB_EMPTY_ROOT(&monc->generic_request_tree)); |
1243 | ||
4e7a5dcd | 1244 | ceph_msg_put(monc->m_auth); |
6694d6b9 | 1245 | ceph_msg_put(monc->m_auth_reply); |
240ed68e | 1246 | ceph_msg_put(monc->m_subscribe); |
7c315c55 | 1247 | ceph_msg_put(monc->m_subscribe_ack); |
ba75bb98 SW |
1248 | |
1249 | kfree(monc->monmap); | |
1250 | } | |
3d14c5d2 | 1251 | EXPORT_SYMBOL(ceph_monc_stop); |
ba75bb98 | 1252 | |
0f9af169 ID |
1253 | static void finish_hunting(struct ceph_mon_client *monc) |
1254 | { | |
1255 | if (monc->hunting) { | |
1256 | dout("%s found mon%d\n", __func__, monc->cur_mon); | |
1257 | monc->hunting = false; | |
168b9090 | 1258 | monc->had_a_connection = true; |
facb9f6e | 1259 | un_backoff(monc); |
7b4c443d | 1260 | __schedule_delayed(monc); |
0f9af169 ID |
1261 | } |
1262 | } | |
1263 | ||
8921f251 ID |
1264 | static void finish_auth(struct ceph_mon_client *monc, int auth_err, |
1265 | bool was_authed) | |
4e7a5dcd | 1266 | { |
8921f251 ID |
1267 | dout("%s auth_err %d was_authed %d\n", __func__, auth_err, was_authed); |
1268 | WARN_ON(auth_err > 0); | |
4e7a5dcd | 1269 | |
9bd2e6f8 | 1270 | monc->pending_auth = 0; |
8921f251 ID |
1271 | if (auth_err) { |
1272 | monc->client->auth_err = auth_err; | |
1273 | wake_up_all(&monc->client->auth_wq); | |
1274 | return; | |
0f9af169 ID |
1275 | } |
1276 | ||
8921f251 ID |
1277 | if (!was_authed && ceph_auth_is_authenticated(monc->auth)) { |
1278 | dout("%s authenticated, starting session global_id %llu\n", | |
1279 | __func__, monc->auth->global_id); | |
0743304d | 1280 | |
15d9882c AE |
1281 | monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT; |
1282 | monc->client->msgr.inst.name.num = | |
0cf5537b | 1283 | cpu_to_le64(monc->auth->global_id); |
0743304d | 1284 | |
4e7a5dcd | 1285 | __send_subscribe(monc); |
f8c76f6f | 1286 | __resend_generic_request(monc); |
0f9af169 ID |
1287 | |
1288 | pr_info("mon%d %s session established\n", monc->cur_mon, | |
b726ec97 | 1289 | ceph_pr_addr(&monc->con.peer_addr)); |
4e7a5dcd | 1290 | } |
8921f251 | 1291 | } |
0f9af169 | 1292 | |
8921f251 ID |
1293 | static void handle_auth_reply(struct ceph_mon_client *monc, |
1294 | struct ceph_msg *msg) | |
1295 | { | |
1296 | bool was_authed; | |
1297 | int ret; | |
1298 | ||
1299 | mutex_lock(&monc->mutex); | |
1300 | was_authed = ceph_auth_is_authenticated(monc->auth); | |
1301 | ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base, | |
1302 | msg->front.iov_len, | |
1303 | monc->m_auth->front.iov_base, | |
1304 | monc->m_auth->front_alloc_len); | |
1305 | if (ret > 0) { | |
1306 | __send_prepared_auth_request(monc, ret); | |
1307 | } else { | |
1308 | finish_auth(monc, ret, was_authed); | |
1309 | finish_hunting(monc); | |
1310 | } | |
4e7a5dcd SW |
1311 | mutex_unlock(&monc->mutex); |
1312 | } | |
1313 | ||
9bd2e6f8 SW |
1314 | static int __validate_auth(struct ceph_mon_client *monc) |
1315 | { | |
1316 | int ret; | |
1317 | ||
1318 | if (monc->pending_auth) | |
1319 | return 0; | |
1320 | ||
1321 | ret = ceph_build_auth(monc->auth, monc->m_auth->front.iov_base, | |
3cea4c30 | 1322 | monc->m_auth->front_alloc_len); |
9bd2e6f8 SW |
1323 | if (ret <= 0) |
1324 | return ret; /* either an error, or no need to authenticate */ | |
1325 | __send_prepared_auth_request(monc, ret); | |
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | int ceph_monc_validate_auth(struct ceph_mon_client *monc) | |
1330 | { | |
1331 | int ret; | |
1332 | ||
1333 | mutex_lock(&monc->mutex); | |
1334 | ret = __validate_auth(monc); | |
1335 | mutex_unlock(&monc->mutex); | |
1336 | return ret; | |
1337 | } | |
3d14c5d2 | 1338 | EXPORT_SYMBOL(ceph_monc_validate_auth); |
9bd2e6f8 | 1339 | |
ba75bb98 SW |
1340 | /* |
1341 | * handle incoming message | |
1342 | */ | |
1343 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1344 | { | |
1345 | struct ceph_mon_client *monc = con->private; | |
1346 | int type = le16_to_cpu(msg->hdr.type); | |
1347 | ||
ba75bb98 | 1348 | switch (type) { |
4e7a5dcd SW |
1349 | case CEPH_MSG_AUTH_REPLY: |
1350 | handle_auth_reply(monc, msg); | |
ba75bb98 SW |
1351 | break; |
1352 | ||
1353 | case CEPH_MSG_MON_SUBSCRIBE_ACK: | |
1354 | handle_subscribe_ack(monc, msg); | |
1355 | break; | |
1356 | ||
1357 | case CEPH_MSG_STATFS_REPLY: | |
1358 | handle_statfs_reply(monc, msg); | |
1359 | break; | |
1360 | ||
513a8243 ID |
1361 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
1362 | handle_get_version_reply(monc, msg); | |
1363 | break; | |
1364 | ||
6305a3b4 DF |
1365 | case CEPH_MSG_MON_COMMAND_ACK: |
1366 | handle_command_ack(monc, msg); | |
1367 | break; | |
1368 | ||
4e7a5dcd SW |
1369 | case CEPH_MSG_MON_MAP: |
1370 | ceph_monc_handle_map(monc, msg); | |
1371 | break; | |
1372 | ||
ba75bb98 SW |
1373 | case CEPH_MSG_OSD_MAP: |
1374 | ceph_osdc_handle_map(&monc->client->osdc, msg); | |
1375 | break; | |
1376 | ||
1377 | default: | |
3d14c5d2 YS |
1378 | /* can the chained handler handle it? */ |
1379 | if (monc->client->extra_mon_dispatch && | |
1380 | monc->client->extra_mon_dispatch(monc->client, msg) == 0) | |
1381 | break; | |
24e1dd6a | 1382 | |
ba75bb98 SW |
1383 | pr_err("received unknown message type %d %s\n", type, |
1384 | ceph_msg_type_name(type)); | |
1385 | } | |
1386 | ceph_msg_put(msg); | |
1387 | } | |
1388 | ||
1389 | /* | |
1390 | * Allocate memory for incoming message | |
1391 | */ | |
1392 | static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, | |
2450418c YS |
1393 | struct ceph_msg_header *hdr, |
1394 | int *skip) | |
ba75bb98 SW |
1395 | { |
1396 | struct ceph_mon_client *monc = con->private; | |
1397 | int type = le16_to_cpu(hdr->type); | |
2450418c | 1398 | int front_len = le32_to_cpu(hdr->front_len); |
5b3a4db3 | 1399 | struct ceph_msg *m = NULL; |
ba75bb98 | 1400 | |
2450418c | 1401 | *skip = 0; |
0547a9b3 | 1402 | |
ba75bb98 | 1403 | switch (type) { |
ba75bb98 | 1404 | case CEPH_MSG_MON_SUBSCRIBE_ACK: |
7c315c55 | 1405 | m = ceph_msg_get(monc->m_subscribe_ack); |
2450418c | 1406 | break; |
ba75bb98 | 1407 | case CEPH_MSG_STATFS_REPLY: |
6305a3b4 | 1408 | case CEPH_MSG_MON_COMMAND_ACK: |
f8c76f6f | 1409 | return get_generic_reply(con, hdr, skip); |
4e7a5dcd | 1410 | case CEPH_MSG_AUTH_REPLY: |
6694d6b9 | 1411 | m = ceph_msg_get(monc->m_auth_reply); |
2450418c | 1412 | break; |
513a8243 ID |
1413 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
1414 | if (le64_to_cpu(hdr->tid) != 0) | |
1415 | return get_generic_reply(con, hdr, skip); | |
1416 | ||
1417 | /* | |
1418 | * Older OSDs don't set reply tid even if the orignal | |
18370b36 GS |
1419 | * request had a non-zero tid. Work around this weirdness |
1420 | * by allocating a new message. | |
513a8243 | 1421 | */ |
df561f66 | 1422 | fallthrough; |
5b3a4db3 SW |
1423 | case CEPH_MSG_MON_MAP: |
1424 | case CEPH_MSG_MDS_MAP: | |
1425 | case CEPH_MSG_OSD_MAP: | |
0cabbd94 | 1426 | case CEPH_MSG_FS_MAP_USER: |
b61c2763 | 1427 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); |
1c20f2d2 AE |
1428 | if (!m) |
1429 | return NULL; /* ENOMEM--return skip == 0 */ | |
5b3a4db3 | 1430 | break; |
ba75bb98 | 1431 | } |
2450418c | 1432 | |
5b3a4db3 SW |
1433 | if (!m) { |
1434 | pr_info("alloc_msg unknown type %d\n", type); | |
2450418c | 1435 | *skip = 1; |
73c3d481 | 1436 | } else if (front_len > m->front_alloc_len) { |
b9a67899 JP |
1437 | pr_warn("mon_alloc_msg front %d > prealloc %d (%u#%llu)\n", |
1438 | front_len, m->front_alloc_len, | |
1439 | (unsigned int)con->peer_name.type, | |
1440 | le64_to_cpu(con->peer_name.num)); | |
73c3d481 SW |
1441 | ceph_msg_put(m); |
1442 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); | |
5b3a4db3 | 1443 | } |
73c3d481 | 1444 | |
2450418c | 1445 | return m; |
ba75bb98 SW |
1446 | } |
1447 | ||
1448 | /* | |
1449 | * If the monitor connection resets, pick a new monitor and resubmit | |
1450 | * any pending requests. | |
1451 | */ | |
1452 | static void mon_fault(struct ceph_connection *con) | |
1453 | { | |
1454 | struct ceph_mon_client *monc = con->private; | |
1455 | ||
ba75bb98 | 1456 | mutex_lock(&monc->mutex); |
b5d91704 ID |
1457 | dout("%s mon%d\n", __func__, monc->cur_mon); |
1458 | if (monc->cur_mon >= 0) { | |
1459 | if (!monc->hunting) { | |
1460 | dout("%s hunting for new mon\n", __func__); | |
1461 | reopen_session(monc); | |
1462 | __schedule_delayed(monc); | |
1463 | } else { | |
1464 | dout("%s already hunting\n", __func__); | |
1465 | } | |
ba75bb98 | 1466 | } |
ba75bb98 SW |
1467 | mutex_unlock(&monc->mutex); |
1468 | } | |
1469 | ||
ec87ef43 SW |
1470 | /* |
1471 | * We can ignore refcounting on the connection struct, as all references | |
1472 | * will come from the messenger workqueue, which is drained prior to | |
1473 | * mon_client destruction. | |
1474 | */ | |
1475 | static struct ceph_connection *con_get(struct ceph_connection *con) | |
1476 | { | |
1477 | return con; | |
1478 | } | |
1479 | ||
1480 | static void con_put(struct ceph_connection *con) | |
1481 | { | |
1482 | } | |
1483 | ||
9e32789f | 1484 | static const struct ceph_connection_operations mon_con_ops = { |
ec87ef43 SW |
1485 | .get = con_get, |
1486 | .put = con_put, | |
ba75bb98 SW |
1487 | .dispatch = dispatch, |
1488 | .fault = mon_fault, | |
1489 | .alloc_msg = mon_alloc_msg, | |
ba75bb98 | 1490 | }; |