Commit | Line | Data |
---|---|---|
3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
ba75bb98 | 2 | |
3d14c5d2 | 3 | #include <linux/module.h> |
ba75bb98 | 4 | #include <linux/types.h> |
5a0e3ad6 | 5 | #include <linux/slab.h> |
ba75bb98 SW |
6 | #include <linux/random.h> |
7 | #include <linux/sched.h> | |
8 | ||
3d14c5d2 YS |
9 | #include <linux/ceph/mon_client.h> |
10 | #include <linux/ceph/libceph.h> | |
ab434b60 | 11 | #include <linux/ceph/debugfs.h> |
3d14c5d2 | 12 | #include <linux/ceph/decode.h> |
3d14c5d2 | 13 | #include <linux/ceph/auth.h> |
ba75bb98 SW |
14 | |
15 | /* | |
16 | * Interact with Ceph monitor cluster. Handle requests for new map | |
17 | * versions, and periodically resend as needed. Also implement | |
18 | * statfs() and umount(). | |
19 | * | |
20 | * A small cluster of Ceph "monitors" are responsible for managing critical | |
21 | * cluster configuration and state information. An odd number (e.g., 3, 5) | |
22 | * of cmon daemons use a modified version of the Paxos part-time parliament | |
23 | * algorithm to manage the MDS map (mds cluster membership), OSD map, and | |
24 | * list of clients who have mounted the file system. | |
25 | * | |
26 | * We maintain an open, active session with a monitor at all times in order to | |
27 | * receive timely MDSMap updates. We periodically send a keepalive byte on the | |
28 | * TCP socket to ensure we detect a failure. If the connection does break, we | |
29 | * randomly hunt for a new monitor. Once the connection is reestablished, we | |
30 | * resend any outstanding requests. | |
31 | */ | |
32 | ||
9e32789f | 33 | static const struct ceph_connection_operations mon_con_ops; |
ba75bb98 | 34 | |
9bd2e6f8 SW |
35 | static int __validate_auth(struct ceph_mon_client *monc); |
36 | ||
ba75bb98 SW |
37 | /* |
38 | * Decode a monmap blob (e.g., during mount). | |
39 | */ | |
40 | struct ceph_monmap *ceph_monmap_decode(void *p, void *end) | |
41 | { | |
42 | struct ceph_monmap *m = NULL; | |
43 | int i, err = -EINVAL; | |
44 | struct ceph_fsid fsid; | |
45 | u32 epoch, num_mon; | |
46 | u16 version; | |
4e7a5dcd SW |
47 | u32 len; |
48 | ||
49 | ceph_decode_32_safe(&p, end, len, bad); | |
50 | ceph_decode_need(&p, end, len, bad); | |
ba75bb98 SW |
51 | |
52 | dout("monmap_decode %p %p len %d\n", p, end, (int)(end-p)); | |
53 | ||
54 | ceph_decode_16_safe(&p, end, version, bad); | |
55 | ||
56 | ceph_decode_need(&p, end, sizeof(fsid) + 2*sizeof(u32), bad); | |
57 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
c89136ea | 58 | epoch = ceph_decode_32(&p); |
ba75bb98 | 59 | |
c89136ea | 60 | num_mon = ceph_decode_32(&p); |
ba75bb98 SW |
61 | ceph_decode_need(&p, end, num_mon*sizeof(m->mon_inst[0]), bad); |
62 | ||
63 | if (num_mon >= CEPH_MAX_MON) | |
64 | goto bad; | |
65 | m = kmalloc(sizeof(*m) + sizeof(m->mon_inst[0])*num_mon, GFP_NOFS); | |
66 | if (m == NULL) | |
67 | return ERR_PTR(-ENOMEM); | |
68 | m->fsid = fsid; | |
69 | m->epoch = epoch; | |
70 | m->num_mon = num_mon; | |
71 | ceph_decode_copy(&p, m->mon_inst, num_mon*sizeof(m->mon_inst[0])); | |
63f2d211 SW |
72 | for (i = 0; i < num_mon; i++) |
73 | ceph_decode_addr(&m->mon_inst[i].addr); | |
ba75bb98 | 74 | |
ba75bb98 SW |
75 | dout("monmap_decode epoch %d, num_mon %d\n", m->epoch, |
76 | m->num_mon); | |
77 | for (i = 0; i < m->num_mon; i++) | |
78 | dout("monmap_decode mon%d is %s\n", i, | |
3d14c5d2 | 79 | ceph_pr_addr(&m->mon_inst[i].addr.in_addr)); |
ba75bb98 SW |
80 | return m; |
81 | ||
82 | bad: | |
83 | dout("monmap_decode failed with %d\n", err); | |
84 | kfree(m); | |
85 | return ERR_PTR(err); | |
86 | } | |
87 | ||
88 | /* | |
89 | * return true if *addr is included in the monmap. | |
90 | */ | |
91 | int ceph_monmap_contains(struct ceph_monmap *m, struct ceph_entity_addr *addr) | |
92 | { | |
93 | int i; | |
94 | ||
95 | for (i = 0; i < m->num_mon; i++) | |
103e2d3a | 96 | if (memcmp(addr, &m->mon_inst[i].addr, sizeof(*addr)) == 0) |
ba75bb98 SW |
97 | return 1; |
98 | return 0; | |
99 | } | |
100 | ||
5ce6e9db SW |
101 | /* |
102 | * Send an auth request. | |
103 | */ | |
104 | static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len) | |
105 | { | |
106 | monc->pending_auth = 1; | |
107 | monc->m_auth->front.iov_len = len; | |
108 | monc->m_auth->hdr.front_len = cpu_to_le32(len); | |
6740a845 | 109 | ceph_msg_revoke(monc->m_auth); |
5ce6e9db | 110 | ceph_msg_get(monc->m_auth); /* keep our ref */ |
67130934 | 111 | ceph_con_send(&monc->con, monc->m_auth); |
5ce6e9db SW |
112 | } |
113 | ||
ba75bb98 SW |
114 | /* |
115 | * Close monitor session, if any. | |
116 | */ | |
117 | static void __close_session(struct ceph_mon_client *monc) | |
118 | { | |
f6a2f5be | 119 | dout("__close_session closing mon%d\n", monc->cur_mon); |
6740a845 | 120 | ceph_msg_revoke(monc->m_auth); |
4f471e4a SW |
121 | ceph_msg_revoke_incoming(monc->m_auth_reply); |
122 | ceph_msg_revoke(monc->m_subscribe); | |
123 | ceph_msg_revoke_incoming(monc->m_subscribe_ack); | |
67130934 | 124 | ceph_con_close(&monc->con); |
0e04dc26 | 125 | |
f6a2f5be SW |
126 | monc->pending_auth = 0; |
127 | ceph_auth_reset(monc->auth); | |
ba75bb98 SW |
128 | } |
129 | ||
130 | /* | |
0e04dc26 ID |
131 | * Pick a new monitor at random and set cur_mon. If we are repicking |
132 | * (i.e. cur_mon is already set), be sure to pick a different one. | |
ba75bb98 | 133 | */ |
0e04dc26 | 134 | static void pick_new_mon(struct ceph_mon_client *monc) |
ba75bb98 | 135 | { |
0e04dc26 | 136 | int old_mon = monc->cur_mon; |
ba75bb98 | 137 | |
0e04dc26 | 138 | BUG_ON(monc->monmap->num_mon < 1); |
ba75bb98 | 139 | |
0e04dc26 ID |
140 | if (monc->monmap->num_mon == 1) { |
141 | monc->cur_mon = 0; | |
142 | } else { | |
143 | int max = monc->monmap->num_mon; | |
144 | int o = -1; | |
145 | int n; | |
146 | ||
147 | if (monc->cur_mon >= 0) { | |
148 | if (monc->cur_mon < monc->monmap->num_mon) | |
149 | o = monc->cur_mon; | |
150 | if (o >= 0) | |
151 | max--; | |
152 | } | |
4e7a5dcd | 153 | |
0e04dc26 ID |
154 | n = prandom_u32() % max; |
155 | if (o >= 0 && n >= o) | |
156 | n++; | |
8b9558aa | 157 | |
0e04dc26 | 158 | monc->cur_mon = n; |
ba75bb98 | 159 | } |
0e04dc26 ID |
160 | |
161 | dout("%s mon%d -> mon%d out of %d mons\n", __func__, old_mon, | |
162 | monc->cur_mon, monc->monmap->num_mon); | |
163 | } | |
164 | ||
165 | /* | |
166 | * Open a session with a new monitor. | |
167 | */ | |
168 | static void __open_session(struct ceph_mon_client *monc) | |
169 | { | |
170 | int ret; | |
171 | ||
172 | pick_new_mon(monc); | |
173 | ||
1752b50c | 174 | monc->hunting = true; |
168b9090 ID |
175 | if (monc->had_a_connection) { |
176 | monc->hunt_mult *= CEPH_MONC_HUNT_BACKOFF; | |
177 | if (monc->hunt_mult > CEPH_MONC_HUNT_MAX_MULT) | |
178 | monc->hunt_mult = CEPH_MONC_HUNT_MAX_MULT; | |
179 | } | |
180 | ||
0e04dc26 ID |
181 | monc->sub_renew_after = jiffies; /* i.e., expired */ |
182 | monc->sub_renew_sent = 0; | |
183 | ||
184 | dout("%s opening mon%d\n", __func__, monc->cur_mon); | |
185 | ceph_con_open(&monc->con, CEPH_ENTITY_TYPE_MON, monc->cur_mon, | |
186 | &monc->monmap->mon_inst[monc->cur_mon].addr); | |
187 | ||
188 | /* | |
189 | * send an initial keepalive to ensure our timestamp is valid | |
190 | * by the time we are in an OPENED state | |
191 | */ | |
192 | ceph_con_keepalive(&monc->con); | |
193 | ||
194 | /* initiate authentication handshake */ | |
195 | ret = ceph_auth_build_hello(monc->auth, | |
196 | monc->m_auth->front.iov_base, | |
197 | monc->m_auth->front_alloc_len); | |
198 | BUG_ON(ret <= 0); | |
199 | __send_prepared_auth_request(monc, ret); | |
ba75bb98 SW |
200 | } |
201 | ||
1752b50c ID |
202 | static void reopen_session(struct ceph_mon_client *monc) |
203 | { | |
204 | if (!monc->hunting) | |
205 | pr_info("mon%d %s session lost, hunting for new mon\n", | |
206 | monc->cur_mon, ceph_pr_addr(&monc->con.peer_addr.in_addr)); | |
207 | ||
208 | __close_session(monc); | |
209 | __open_session(monc); | |
210 | } | |
211 | ||
ba75bb98 SW |
212 | /* |
213 | * Reschedule delayed work timer. | |
214 | */ | |
215 | static void __schedule_delayed(struct ceph_mon_client *monc) | |
216 | { | |
8b9558aa | 217 | unsigned long delay; |
ba75bb98 | 218 | |
168b9090 ID |
219 | if (monc->hunting) |
220 | delay = CEPH_MONC_HUNT_INTERVAL * monc->hunt_mult; | |
221 | else | |
58d81b12 | 222 | delay = CEPH_MONC_PING_INTERVAL; |
168b9090 | 223 | |
8b9558aa | 224 | dout("__schedule_delayed after %lu\n", delay); |
bee3a37c ID |
225 | mod_delayed_work(system_wq, &monc->delayed_work, |
226 | round_jiffies_relative(delay)); | |
ba75bb98 SW |
227 | } |
228 | ||
82dcabad ID |
229 | const char *ceph_sub_str[] = { |
230 | [CEPH_SUB_MDSMAP] = "mdsmap", | |
231 | [CEPH_SUB_MONMAP] = "monmap", | |
232 | [CEPH_SUB_OSDMAP] = "osdmap", | |
233 | }; | |
234 | ||
ba75bb98 | 235 | /* |
82dcabad ID |
236 | * Send subscribe request for one or more maps, according to |
237 | * monc->subs. | |
ba75bb98 SW |
238 | */ |
239 | static void __send_subscribe(struct ceph_mon_client *monc) | |
240 | { | |
82dcabad ID |
241 | struct ceph_msg *msg = monc->m_subscribe; |
242 | void *p = msg->front.iov_base; | |
243 | void *const end = p + msg->front_alloc_len; | |
244 | int num = 0; | |
245 | int i; | |
246 | ||
247 | dout("%s sent %lu\n", __func__, monc->sub_renew_sent); | |
248 | ||
249 | BUG_ON(monc->cur_mon < 0); | |
250 | ||
251 | if (!monc->sub_renew_sent) | |
252 | monc->sub_renew_sent = jiffies | 1; /* never 0 */ | |
253 | ||
254 | msg->hdr.version = cpu_to_le16(2); | |
255 | ||
256 | for (i = 0; i < ARRAY_SIZE(monc->subs); i++) { | |
257 | if (monc->subs[i].want) | |
258 | num++; | |
259 | } | |
260 | BUG_ON(num < 1); /* monmap sub is always there */ | |
261 | ceph_encode_32(&p, num); | |
262 | for (i = 0; i < ARRAY_SIZE(monc->subs); i++) { | |
263 | const char *s = ceph_sub_str[i]; | |
264 | ||
265 | if (!monc->subs[i].want) | |
266 | continue; | |
267 | ||
268 | dout("%s %s start %llu flags 0x%x\n", __func__, s, | |
269 | le64_to_cpu(monc->subs[i].item.start), | |
270 | monc->subs[i].item.flags); | |
271 | ceph_encode_string(&p, end, s, strlen(s)); | |
272 | memcpy(p, &monc->subs[i].item, sizeof(monc->subs[i].item)); | |
273 | p += sizeof(monc->subs[i].item); | |
ba75bb98 | 274 | } |
82dcabad ID |
275 | |
276 | BUG_ON(p != (end - 35 - (ARRAY_SIZE(monc->subs) - num) * 19)); | |
277 | msg->front.iov_len = p - msg->front.iov_base; | |
278 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
279 | ceph_msg_revoke(msg); | |
280 | ceph_con_send(&monc->con, ceph_msg_get(msg)); | |
ba75bb98 SW |
281 | } |
282 | ||
283 | static void handle_subscribe_ack(struct ceph_mon_client *monc, | |
284 | struct ceph_msg *msg) | |
285 | { | |
95c96174 | 286 | unsigned int seconds; |
07bd10fb SW |
287 | struct ceph_mon_subscribe_ack *h = msg->front.iov_base; |
288 | ||
289 | if (msg->front.iov_len < sizeof(*h)) | |
290 | goto bad; | |
291 | seconds = le32_to_cpu(h->duration); | |
ba75bb98 | 292 | |
ba75bb98 | 293 | mutex_lock(&monc->mutex); |
82dcabad ID |
294 | if (monc->sub_renew_sent) { |
295 | monc->sub_renew_after = monc->sub_renew_sent + | |
296 | (seconds >> 1) * HZ - 1; | |
297 | dout("%s sent %lu duration %d renew after %lu\n", __func__, | |
298 | monc->sub_renew_sent, seconds, monc->sub_renew_after); | |
299 | monc->sub_renew_sent = 0; | |
300 | } else { | |
301 | dout("%s sent %lu renew after %lu, ignoring\n", __func__, | |
302 | monc->sub_renew_sent, monc->sub_renew_after); | |
303 | } | |
ba75bb98 SW |
304 | mutex_unlock(&monc->mutex); |
305 | return; | |
306 | bad: | |
307 | pr_err("got corrupt subscribe-ack msg\n"); | |
9ec7cab1 | 308 | ceph_msg_dump(msg); |
ba75bb98 SW |
309 | } |
310 | ||
311 | /* | |
82dcabad ID |
312 | * Register interest in a map |
313 | * | |
314 | * @sub: one of CEPH_SUB_* | |
315 | * @epoch: X for "every map since X", or 0 for "just the latest" | |
ba75bb98 | 316 | */ |
82dcabad ID |
317 | static bool __ceph_monc_want_map(struct ceph_mon_client *monc, int sub, |
318 | u32 epoch, bool continuous) | |
ba75bb98 | 319 | { |
82dcabad ID |
320 | __le64 start = cpu_to_le64(epoch); |
321 | u8 flags = !continuous ? CEPH_SUBSCRIBE_ONETIME : 0; | |
322 | ||
323 | dout("%s %s epoch %u continuous %d\n", __func__, ceph_sub_str[sub], | |
324 | epoch, continuous); | |
325 | ||
326 | if (monc->subs[sub].want && | |
327 | monc->subs[sub].item.start == start && | |
328 | monc->subs[sub].item.flags == flags) | |
329 | return false; | |
330 | ||
331 | monc->subs[sub].item.start = start; | |
332 | monc->subs[sub].item.flags = flags; | |
333 | monc->subs[sub].want = true; | |
334 | ||
335 | return true; | |
336 | } | |
337 | ||
338 | bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch, | |
339 | bool continuous) | |
340 | { | |
341 | bool need_request; | |
342 | ||
ba75bb98 | 343 | mutex_lock(&monc->mutex); |
82dcabad | 344 | need_request = __ceph_monc_want_map(monc, sub, epoch, continuous); |
ba75bb98 | 345 | mutex_unlock(&monc->mutex); |
82dcabad ID |
346 | |
347 | return need_request; | |
348 | } | |
349 | EXPORT_SYMBOL(ceph_monc_want_map); | |
350 | ||
351 | /* | |
352 | * Keep track of which maps we have | |
353 | * | |
354 | * @sub: one of CEPH_SUB_* | |
355 | */ | |
356 | static void __ceph_monc_got_map(struct ceph_mon_client *monc, int sub, | |
357 | u32 epoch) | |
358 | { | |
359 | dout("%s %s epoch %u\n", __func__, ceph_sub_str[sub], epoch); | |
360 | ||
361 | if (monc->subs[sub].want) { | |
362 | if (monc->subs[sub].item.flags & CEPH_SUBSCRIBE_ONETIME) | |
363 | monc->subs[sub].want = false; | |
364 | else | |
365 | monc->subs[sub].item.start = cpu_to_le64(epoch + 1); | |
366 | } | |
367 | ||
368 | monc->subs[sub].have = epoch; | |
ba75bb98 SW |
369 | } |
370 | ||
82dcabad | 371 | void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch) |
ba75bb98 SW |
372 | { |
373 | mutex_lock(&monc->mutex); | |
82dcabad | 374 | __ceph_monc_got_map(monc, sub, epoch); |
ba75bb98 | 375 | mutex_unlock(&monc->mutex); |
ba75bb98 | 376 | } |
82dcabad | 377 | EXPORT_SYMBOL(ceph_monc_got_map); |
ba75bb98 SW |
378 | |
379 | /* | |
380 | * Register interest in the next osdmap | |
381 | */ | |
382 | void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc) | |
383 | { | |
82dcabad | 384 | dout("%s have %u\n", __func__, monc->subs[CEPH_SUB_OSDMAP].have); |
ba75bb98 | 385 | mutex_lock(&monc->mutex); |
82dcabad ID |
386 | if (__ceph_monc_want_map(monc, CEPH_SUB_OSDMAP, |
387 | monc->subs[CEPH_SUB_OSDMAP].have + 1, false)) | |
ba75bb98 SW |
388 | __send_subscribe(monc); |
389 | mutex_unlock(&monc->mutex); | |
390 | } | |
6044cde6 ID |
391 | EXPORT_SYMBOL(ceph_monc_request_next_osdmap); |
392 | ||
a319bf56 ID |
393 | /* |
394 | * Wait for an osdmap with a given epoch. | |
395 | * | |
396 | * @epoch: epoch to wait for | |
397 | * @timeout: in jiffies, 0 means "wait forever" | |
398 | */ | |
6044cde6 ID |
399 | int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch, |
400 | unsigned long timeout) | |
401 | { | |
402 | unsigned long started = jiffies; | |
216639dd | 403 | long ret; |
6044cde6 ID |
404 | |
405 | mutex_lock(&monc->mutex); | |
82dcabad | 406 | while (monc->subs[CEPH_SUB_OSDMAP].have < epoch) { |
6044cde6 ID |
407 | mutex_unlock(&monc->mutex); |
408 | ||
a319bf56 | 409 | if (timeout && time_after_eq(jiffies, started + timeout)) |
6044cde6 ID |
410 | return -ETIMEDOUT; |
411 | ||
412 | ret = wait_event_interruptible_timeout(monc->client->auth_wq, | |
82dcabad ID |
413 | monc->subs[CEPH_SUB_OSDMAP].have >= epoch, |
414 | ceph_timeout_jiffies(timeout)); | |
6044cde6 ID |
415 | if (ret < 0) |
416 | return ret; | |
417 | ||
418 | mutex_lock(&monc->mutex); | |
419 | } | |
420 | ||
421 | mutex_unlock(&monc->mutex); | |
422 | return 0; | |
423 | } | |
424 | EXPORT_SYMBOL(ceph_monc_wait_osdmap); | |
ba75bb98 | 425 | |
4e7a5dcd | 426 | /* |
82dcabad ID |
427 | * Open a session with a random monitor. Request monmap and osdmap, |
428 | * which are waited upon in __ceph_open_session(). | |
4e7a5dcd SW |
429 | */ |
430 | int ceph_monc_open_session(struct ceph_mon_client *monc) | |
ba75bb98 | 431 | { |
ba75bb98 | 432 | mutex_lock(&monc->mutex); |
82dcabad ID |
433 | __ceph_monc_want_map(monc, CEPH_SUB_MONMAP, 0, true); |
434 | __ceph_monc_want_map(monc, CEPH_SUB_OSDMAP, 0, false); | |
4e7a5dcd | 435 | __open_session(monc); |
ba75bb98 SW |
436 | __schedule_delayed(monc); |
437 | mutex_unlock(&monc->mutex); | |
438 | return 0; | |
439 | } | |
3d14c5d2 | 440 | EXPORT_SYMBOL(ceph_monc_open_session); |
ba75bb98 | 441 | |
0743304d SW |
442 | static void ceph_monc_handle_map(struct ceph_mon_client *monc, |
443 | struct ceph_msg *msg) | |
4e7a5dcd SW |
444 | { |
445 | struct ceph_client *client = monc->client; | |
446 | struct ceph_monmap *monmap = NULL, *old = monc->monmap; | |
447 | void *p, *end; | |
448 | ||
449 | mutex_lock(&monc->mutex); | |
450 | ||
451 | dout("handle_monmap\n"); | |
452 | p = msg->front.iov_base; | |
453 | end = p + msg->front.iov_len; | |
454 | ||
455 | monmap = ceph_monmap_decode(p, end); | |
456 | if (IS_ERR(monmap)) { | |
457 | pr_err("problem decoding monmap, %d\n", | |
458 | (int)PTR_ERR(monmap)); | |
d4a780ce | 459 | goto out; |
4e7a5dcd | 460 | } |
0743304d SW |
461 | |
462 | if (ceph_check_fsid(monc->client, &monmap->fsid) < 0) { | |
4e7a5dcd | 463 | kfree(monmap); |
d4a780ce | 464 | goto out; |
4e7a5dcd SW |
465 | } |
466 | ||
467 | client->monc.monmap = monmap; | |
4e7a5dcd SW |
468 | kfree(old); |
469 | ||
82dcabad | 470 | __ceph_monc_got_map(monc, CEPH_SUB_MONMAP, monc->monmap->epoch); |
02ac956c | 471 | client->have_fsid = true; |
d1c338a5 | 472 | |
d4a780ce | 473 | out: |
4e7a5dcd | 474 | mutex_unlock(&monc->mutex); |
03066f23 | 475 | wake_up_all(&client->auth_wq); |
4e7a5dcd SW |
476 | } |
477 | ||
ba75bb98 | 478 | /* |
7a6fdeb2 | 479 | * generic requests (currently statfs, mon_get_version) |
ba75bb98 | 480 | */ |
fcd00b68 | 481 | DEFINE_RB_FUNCS(generic_request, struct ceph_mon_generic_request, tid, node) |
85ff03f6 | 482 | |
f8c76f6f | 483 | static void release_generic_request(struct kref *kref) |
3143edd3 | 484 | { |
f8c76f6f YS |
485 | struct ceph_mon_generic_request *req = |
486 | container_of(kref, struct ceph_mon_generic_request, kref); | |
3143edd3 SW |
487 | |
488 | if (req->reply) | |
489 | ceph_msg_put(req->reply); | |
490 | if (req->request) | |
491 | ceph_msg_put(req->request); | |
20547567 YS |
492 | |
493 | kfree(req); | |
3143edd3 SW |
494 | } |
495 | ||
f8c76f6f | 496 | static void put_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 | 497 | { |
f8c76f6f | 498 | kref_put(&req->kref, release_generic_request); |
3143edd3 SW |
499 | } |
500 | ||
f8c76f6f | 501 | static void get_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 SW |
502 | { |
503 | kref_get(&req->kref); | |
504 | } | |
505 | ||
f8c76f6f | 506 | static struct ceph_msg *get_generic_reply(struct ceph_connection *con, |
3143edd3 SW |
507 | struct ceph_msg_header *hdr, |
508 | int *skip) | |
509 | { | |
510 | struct ceph_mon_client *monc = con->private; | |
f8c76f6f | 511 | struct ceph_mon_generic_request *req; |
3143edd3 SW |
512 | u64 tid = le64_to_cpu(hdr->tid); |
513 | struct ceph_msg *m; | |
514 | ||
515 | mutex_lock(&monc->mutex); | |
fcd00b68 | 516 | req = lookup_generic_request(&monc->generic_request_tree, tid); |
3143edd3 | 517 | if (!req) { |
f8c76f6f | 518 | dout("get_generic_reply %lld dne\n", tid); |
3143edd3 SW |
519 | *skip = 1; |
520 | m = NULL; | |
521 | } else { | |
f8c76f6f | 522 | dout("get_generic_reply %lld got %p\n", tid, req->reply); |
1c20f2d2 | 523 | *skip = 0; |
3143edd3 SW |
524 | m = ceph_msg_get(req->reply); |
525 | /* | |
526 | * we don't need to track the connection reading into | |
527 | * this reply because we only have one open connection | |
528 | * at a time, ever. | |
529 | */ | |
530 | } | |
531 | mutex_unlock(&monc->mutex); | |
532 | return m; | |
533 | } | |
534 | ||
513a8243 ID |
535 | static int __do_generic_request(struct ceph_mon_client *monc, u64 tid, |
536 | struct ceph_mon_generic_request *req) | |
e56fa10e YS |
537 | { |
538 | int err; | |
539 | ||
540 | /* register request */ | |
513a8243 | 541 | req->tid = tid != 0 ? tid : ++monc->last_tid; |
e56fa10e | 542 | req->request->hdr.tid = cpu_to_le64(req->tid); |
fcd00b68 | 543 | insert_generic_request(&monc->generic_request_tree, req); |
67130934 | 544 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
e56fa10e YS |
545 | mutex_unlock(&monc->mutex); |
546 | ||
547 | err = wait_for_completion_interruptible(&req->completion); | |
548 | ||
549 | mutex_lock(&monc->mutex); | |
fcd00b68 | 550 | erase_generic_request(&monc->generic_request_tree, req); |
e56fa10e YS |
551 | |
552 | if (!err) | |
553 | err = req->result; | |
554 | return err; | |
555 | } | |
556 | ||
513a8243 ID |
557 | static int do_generic_request(struct ceph_mon_client *monc, |
558 | struct ceph_mon_generic_request *req) | |
559 | { | |
560 | int err; | |
561 | ||
562 | mutex_lock(&monc->mutex); | |
563 | err = __do_generic_request(monc, 0, req); | |
564 | mutex_unlock(&monc->mutex); | |
565 | ||
566 | return err; | |
567 | } | |
568 | ||
e56fa10e YS |
569 | /* |
570 | * statfs | |
571 | */ | |
ba75bb98 SW |
572 | static void handle_statfs_reply(struct ceph_mon_client *monc, |
573 | struct ceph_msg *msg) | |
574 | { | |
f8c76f6f | 575 | struct ceph_mon_generic_request *req; |
ba75bb98 | 576 | struct ceph_mon_statfs_reply *reply = msg->front.iov_base; |
3143edd3 | 577 | u64 tid = le64_to_cpu(msg->hdr.tid); |
ba75bb98 SW |
578 | |
579 | if (msg->front.iov_len != sizeof(*reply)) | |
580 | goto bad; | |
ba75bb98 SW |
581 | dout("handle_statfs_reply %p tid %llu\n", msg, tid); |
582 | ||
583 | mutex_lock(&monc->mutex); | |
fcd00b68 | 584 | req = lookup_generic_request(&monc->generic_request_tree, tid); |
ba75bb98 | 585 | if (req) { |
f8c76f6f | 586 | *(struct ceph_statfs *)req->buf = reply->st; |
ba75bb98 | 587 | req->result = 0; |
f8c76f6f | 588 | get_generic_request(req); |
ba75bb98 SW |
589 | } |
590 | mutex_unlock(&monc->mutex); | |
3143edd3 | 591 | if (req) { |
03066f23 | 592 | complete_all(&req->completion); |
f8c76f6f | 593 | put_generic_request(req); |
3143edd3 | 594 | } |
ba75bb98 SW |
595 | return; |
596 | ||
597 | bad: | |
7a6fdeb2 | 598 | pr_err("corrupt statfs reply, tid %llu\n", tid); |
9ec7cab1 | 599 | ceph_msg_dump(msg); |
ba75bb98 SW |
600 | } |
601 | ||
602 | /* | |
3143edd3 | 603 | * Do a synchronous statfs(). |
ba75bb98 | 604 | */ |
3143edd3 | 605 | int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf) |
ba75bb98 | 606 | { |
f8c76f6f | 607 | struct ceph_mon_generic_request *req; |
ba75bb98 | 608 | struct ceph_mon_statfs *h; |
3143edd3 SW |
609 | int err; |
610 | ||
cffe7b6d | 611 | req = kzalloc(sizeof(*req), GFP_NOFS); |
3143edd3 SW |
612 | if (!req) |
613 | return -ENOMEM; | |
614 | ||
3143edd3 | 615 | kref_init(&req->kref); |
fcd00b68 | 616 | RB_CLEAR_NODE(&req->node); |
3143edd3 SW |
617 | req->buf = buf; |
618 | init_completion(&req->completion); | |
ba75bb98 | 619 | |
a79832f2 | 620 | err = -ENOMEM; |
b61c2763 SW |
621 | req->request = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), GFP_NOFS, |
622 | true); | |
a79832f2 | 623 | if (!req->request) |
3143edd3 | 624 | goto out; |
b61c2763 SW |
625 | req->reply = ceph_msg_new(CEPH_MSG_STATFS_REPLY, 1024, GFP_NOFS, |
626 | true); | |
a79832f2 | 627 | if (!req->reply) |
3143edd3 | 628 | goto out; |
3143edd3 SW |
629 | |
630 | /* fill out request */ | |
631 | h = req->request->front.iov_base; | |
13e38c8a SW |
632 | h->monhdr.have_version = 0; |
633 | h->monhdr.session_mon = cpu_to_le16(-1); | |
634 | h->monhdr.session_mon_tid = 0; | |
ba75bb98 | 635 | h->fsid = monc->monmap->fsid; |
ba75bb98 | 636 | |
e56fa10e | 637 | err = do_generic_request(monc, req); |
ba75bb98 | 638 | |
e56fa10e | 639 | out: |
f646912d | 640 | put_generic_request(req); |
e56fa10e YS |
641 | return err; |
642 | } | |
3d14c5d2 | 643 | EXPORT_SYMBOL(ceph_monc_do_statfs); |
e56fa10e | 644 | |
513a8243 ID |
645 | static void handle_get_version_reply(struct ceph_mon_client *monc, |
646 | struct ceph_msg *msg) | |
647 | { | |
648 | struct ceph_mon_generic_request *req; | |
649 | u64 tid = le64_to_cpu(msg->hdr.tid); | |
650 | void *p = msg->front.iov_base; | |
651 | void *end = p + msg->front_alloc_len; | |
652 | u64 handle; | |
653 | ||
654 | dout("%s %p tid %llu\n", __func__, msg, tid); | |
655 | ||
656 | ceph_decode_need(&p, end, 2*sizeof(u64), bad); | |
657 | handle = ceph_decode_64(&p); | |
658 | if (tid != 0 && tid != handle) | |
659 | goto bad; | |
660 | ||
661 | mutex_lock(&monc->mutex); | |
fcd00b68 | 662 | req = lookup_generic_request(&monc->generic_request_tree, handle); |
513a8243 ID |
663 | if (req) { |
664 | *(u64 *)req->buf = ceph_decode_64(&p); | |
665 | req->result = 0; | |
666 | get_generic_request(req); | |
667 | } | |
668 | mutex_unlock(&monc->mutex); | |
669 | if (req) { | |
670 | complete_all(&req->completion); | |
671 | put_generic_request(req); | |
672 | } | |
673 | ||
674 | return; | |
675 | bad: | |
7a6fdeb2 | 676 | pr_err("corrupt mon_get_version reply, tid %llu\n", tid); |
513a8243 ID |
677 | ceph_msg_dump(msg); |
678 | } | |
679 | ||
680 | /* | |
681 | * Send MMonGetVersion and wait for the reply. | |
682 | * | |
683 | * @what: one of "mdsmap", "osdmap" or "monmap" | |
684 | */ | |
685 | int ceph_monc_do_get_version(struct ceph_mon_client *monc, const char *what, | |
686 | u64 *newest) | |
687 | { | |
688 | struct ceph_mon_generic_request *req; | |
689 | void *p, *end; | |
690 | u64 tid; | |
691 | int err; | |
692 | ||
693 | req = kzalloc(sizeof(*req), GFP_NOFS); | |
694 | if (!req) | |
695 | return -ENOMEM; | |
696 | ||
697 | kref_init(&req->kref); | |
fcd00b68 | 698 | RB_CLEAR_NODE(&req->node); |
513a8243 | 699 | req->buf = newest; |
513a8243 ID |
700 | init_completion(&req->completion); |
701 | ||
702 | req->request = ceph_msg_new(CEPH_MSG_MON_GET_VERSION, | |
703 | sizeof(u64) + sizeof(u32) + strlen(what), | |
704 | GFP_NOFS, true); | |
705 | if (!req->request) { | |
706 | err = -ENOMEM; | |
707 | goto out; | |
708 | } | |
709 | ||
710 | req->reply = ceph_msg_new(CEPH_MSG_MON_GET_VERSION_REPLY, 1024, | |
711 | GFP_NOFS, true); | |
712 | if (!req->reply) { | |
713 | err = -ENOMEM; | |
714 | goto out; | |
715 | } | |
716 | ||
717 | p = req->request->front.iov_base; | |
718 | end = p + req->request->front_alloc_len; | |
719 | ||
720 | /* fill out request */ | |
721 | mutex_lock(&monc->mutex); | |
722 | tid = ++monc->last_tid; | |
723 | ceph_encode_64(&p, tid); /* handle */ | |
724 | ceph_encode_string(&p, end, what, strlen(what)); | |
725 | ||
726 | err = __do_generic_request(monc, tid, req); | |
727 | ||
728 | mutex_unlock(&monc->mutex); | |
729 | out: | |
f646912d | 730 | put_generic_request(req); |
513a8243 ID |
731 | return err; |
732 | } | |
733 | EXPORT_SYMBOL(ceph_monc_do_get_version); | |
734 | ||
ba75bb98 | 735 | /* |
e56fa10e | 736 | * Resend pending generic requests. |
ba75bb98 | 737 | */ |
f8c76f6f | 738 | static void __resend_generic_request(struct ceph_mon_client *monc) |
ba75bb98 | 739 | { |
f8c76f6f | 740 | struct ceph_mon_generic_request *req; |
85ff03f6 | 741 | struct rb_node *p; |
ba75bb98 | 742 | |
f8c76f6f YS |
743 | for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) { |
744 | req = rb_entry(p, struct ceph_mon_generic_request, node); | |
6740a845 | 745 | ceph_msg_revoke(req->request); |
4f471e4a | 746 | ceph_msg_revoke_incoming(req->reply); |
67130934 | 747 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
ba75bb98 SW |
748 | } |
749 | } | |
750 | ||
751 | /* | |
752 | * Delayed work. If we haven't mounted yet, retry. Otherwise, | |
753 | * renew/retry subscription as needed (in case it is timing out, or we | |
754 | * got an ENOMEM). And keep the monitor connection alive. | |
755 | */ | |
756 | static void delayed_work(struct work_struct *work) | |
757 | { | |
758 | struct ceph_mon_client *monc = | |
759 | container_of(work, struct ceph_mon_client, delayed_work.work); | |
760 | ||
761 | dout("monc delayed_work\n"); | |
762 | mutex_lock(&monc->mutex); | |
4e7a5dcd | 763 | if (monc->hunting) { |
1752b50c ID |
764 | dout("%s continuing hunt\n", __func__); |
765 | reopen_session(monc); | |
ba75bb98 | 766 | } else { |
8b9558aa YZ |
767 | int is_auth = ceph_auth_is_authenticated(monc->auth); |
768 | if (ceph_con_keepalive_expired(&monc->con, | |
58d81b12 | 769 | CEPH_MONC_PING_TIMEOUT)) { |
8b9558aa YZ |
770 | dout("monc keepalive timeout\n"); |
771 | is_auth = 0; | |
1752b50c | 772 | reopen_session(monc); |
8b9558aa | 773 | } |
9bd2e6f8 | 774 | |
8b9558aa YZ |
775 | if (!monc->hunting) { |
776 | ceph_con_keepalive(&monc->con); | |
777 | __validate_auth(monc); | |
778 | } | |
9bd2e6f8 | 779 | |
82dcabad ID |
780 | if (is_auth) { |
781 | unsigned long now = jiffies; | |
782 | ||
783 | dout("%s renew subs? now %lu renew after %lu\n", | |
784 | __func__, now, monc->sub_renew_after); | |
785 | if (time_after_eq(now, monc->sub_renew_after)) | |
786 | __send_subscribe(monc); | |
787 | } | |
ba75bb98 | 788 | } |
ba75bb98 SW |
789 | __schedule_delayed(monc); |
790 | mutex_unlock(&monc->mutex); | |
791 | } | |
792 | ||
6b805185 SW |
793 | /* |
794 | * On startup, we build a temporary monmap populated with the IPs | |
795 | * provided by mount(2). | |
796 | */ | |
797 | static int build_initial_monmap(struct ceph_mon_client *monc) | |
798 | { | |
3d14c5d2 YS |
799 | struct ceph_options *opt = monc->client->options; |
800 | struct ceph_entity_addr *mon_addr = opt->mon_addr; | |
801 | int num_mon = opt->num_mon; | |
6b805185 SW |
802 | int i; |
803 | ||
804 | /* build initial monmap */ | |
805 | monc->monmap = kzalloc(sizeof(*monc->monmap) + | |
806 | num_mon*sizeof(monc->monmap->mon_inst[0]), | |
807 | GFP_KERNEL); | |
808 | if (!monc->monmap) | |
809 | return -ENOMEM; | |
810 | for (i = 0; i < num_mon; i++) { | |
811 | monc->monmap->mon_inst[i].addr = mon_addr[i]; | |
6b805185 SW |
812 | monc->monmap->mon_inst[i].addr.nonce = 0; |
813 | monc->monmap->mon_inst[i].name.type = | |
814 | CEPH_ENTITY_TYPE_MON; | |
815 | monc->monmap->mon_inst[i].name.num = cpu_to_le64(i); | |
816 | } | |
817 | monc->monmap->num_mon = num_mon; | |
6b805185 SW |
818 | return 0; |
819 | } | |
820 | ||
ba75bb98 SW |
821 | int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl) |
822 | { | |
823 | int err = 0; | |
824 | ||
825 | dout("init\n"); | |
826 | memset(monc, 0, sizeof(*monc)); | |
827 | monc->client = cl; | |
828 | monc->monmap = NULL; | |
829 | mutex_init(&monc->mutex); | |
830 | ||
6b805185 SW |
831 | err = build_initial_monmap(monc); |
832 | if (err) | |
833 | goto out; | |
834 | ||
f6a2f5be | 835 | /* connection */ |
4e7a5dcd | 836 | /* authentication */ |
3d14c5d2 | 837 | monc->auth = ceph_auth_init(cl->options->name, |
8323c3aa | 838 | cl->options->key); |
49d9224c NW |
839 | if (IS_ERR(monc->auth)) { |
840 | err = PTR_ERR(monc->auth); | |
67130934 | 841 | goto out_monmap; |
49d9224c | 842 | } |
4e7a5dcd SW |
843 | monc->auth->want_keys = |
844 | CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON | | |
845 | CEPH_ENTITY_TYPE_OSD | CEPH_ENTITY_TYPE_MDS; | |
846 | ||
240ed68e | 847 | /* msgs */ |
a79832f2 | 848 | err = -ENOMEM; |
7c315c55 | 849 | monc->m_subscribe_ack = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE_ACK, |
34d23762 | 850 | sizeof(struct ceph_mon_subscribe_ack), |
b61c2763 | 851 | GFP_NOFS, true); |
a79832f2 | 852 | if (!monc->m_subscribe_ack) |
49d9224c | 853 | goto out_auth; |
6694d6b9 | 854 | |
b61c2763 SW |
855 | monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 96, GFP_NOFS, |
856 | true); | |
240ed68e SW |
857 | if (!monc->m_subscribe) |
858 | goto out_subscribe_ack; | |
859 | ||
b61c2763 SW |
860 | monc->m_auth_reply = ceph_msg_new(CEPH_MSG_AUTH_REPLY, 4096, GFP_NOFS, |
861 | true); | |
a79832f2 | 862 | if (!monc->m_auth_reply) |
240ed68e | 863 | goto out_subscribe; |
4e7a5dcd | 864 | |
b61c2763 | 865 | monc->m_auth = ceph_msg_new(CEPH_MSG_AUTH, 4096, GFP_NOFS, true); |
9bd2e6f8 | 866 | monc->pending_auth = 0; |
a79832f2 | 867 | if (!monc->m_auth) |
6694d6b9 | 868 | goto out_auth_reply; |
ba75bb98 | 869 | |
735a72ef SW |
870 | ceph_con_init(&monc->con, monc, &mon_con_ops, |
871 | &monc->client->msgr); | |
872 | ||
ba75bb98 | 873 | monc->cur_mon = -1; |
168b9090 ID |
874 | monc->had_a_connection = false; |
875 | monc->hunt_mult = 1; | |
ba75bb98 SW |
876 | |
877 | INIT_DELAYED_WORK(&monc->delayed_work, delayed_work); | |
f8c76f6f | 878 | monc->generic_request_tree = RB_ROOT; |
ba75bb98 SW |
879 | monc->last_tid = 0; |
880 | ||
4e7a5dcd SW |
881 | return 0; |
882 | ||
6694d6b9 SW |
883 | out_auth_reply: |
884 | ceph_msg_put(monc->m_auth_reply); | |
240ed68e SW |
885 | out_subscribe: |
886 | ceph_msg_put(monc->m_subscribe); | |
7c315c55 SW |
887 | out_subscribe_ack: |
888 | ceph_msg_put(monc->m_subscribe_ack); | |
49d9224c NW |
889 | out_auth: |
890 | ceph_auth_destroy(monc->auth); | |
4e7a5dcd SW |
891 | out_monmap: |
892 | kfree(monc->monmap); | |
ba75bb98 SW |
893 | out: |
894 | return err; | |
895 | } | |
3d14c5d2 | 896 | EXPORT_SYMBOL(ceph_monc_init); |
ba75bb98 SW |
897 | |
898 | void ceph_monc_stop(struct ceph_mon_client *monc) | |
899 | { | |
900 | dout("stop\n"); | |
901 | cancel_delayed_work_sync(&monc->delayed_work); | |
902 | ||
903 | mutex_lock(&monc->mutex); | |
904 | __close_session(monc); | |
0e04dc26 | 905 | monc->cur_mon = -1; |
ba75bb98 SW |
906 | mutex_unlock(&monc->mutex); |
907 | ||
f3dea7ed SW |
908 | /* |
909 | * flush msgr queue before we destroy ourselves to ensure that: | |
910 | * - any work that references our embedded con is finished. | |
911 | * - any osd_client or other work that may reference an authorizer | |
912 | * finishes before we shut down the auth subsystem. | |
913 | */ | |
914 | ceph_msgr_flush(); | |
915 | ||
4e7a5dcd SW |
916 | ceph_auth_destroy(monc->auth); |
917 | ||
918 | ceph_msg_put(monc->m_auth); | |
6694d6b9 | 919 | ceph_msg_put(monc->m_auth_reply); |
240ed68e | 920 | ceph_msg_put(monc->m_subscribe); |
7c315c55 | 921 | ceph_msg_put(monc->m_subscribe_ack); |
ba75bb98 SW |
922 | |
923 | kfree(monc->monmap); | |
924 | } | |
3d14c5d2 | 925 | EXPORT_SYMBOL(ceph_monc_stop); |
ba75bb98 | 926 | |
0f9af169 ID |
927 | static void finish_hunting(struct ceph_mon_client *monc) |
928 | { | |
929 | if (monc->hunting) { | |
930 | dout("%s found mon%d\n", __func__, monc->cur_mon); | |
931 | monc->hunting = false; | |
168b9090 ID |
932 | monc->had_a_connection = true; |
933 | monc->hunt_mult /= 2; /* reduce by 50% */ | |
934 | if (monc->hunt_mult < 1) | |
935 | monc->hunt_mult = 1; | |
0f9af169 ID |
936 | } |
937 | } | |
938 | ||
4e7a5dcd SW |
939 | static void handle_auth_reply(struct ceph_mon_client *monc, |
940 | struct ceph_msg *msg) | |
941 | { | |
942 | int ret; | |
09c4d6a7 | 943 | int was_auth = 0; |
4e7a5dcd SW |
944 | |
945 | mutex_lock(&monc->mutex); | |
27859f97 | 946 | was_auth = ceph_auth_is_authenticated(monc->auth); |
9bd2e6f8 | 947 | monc->pending_auth = 0; |
4e7a5dcd SW |
948 | ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base, |
949 | msg->front.iov_len, | |
950 | monc->m_auth->front.iov_base, | |
3cea4c30 | 951 | monc->m_auth->front_alloc_len); |
0f9af169 ID |
952 | if (ret > 0) { |
953 | __send_prepared_auth_request(monc, ret); | |
954 | goto out; | |
955 | } | |
956 | ||
957 | finish_hunting(monc); | |
958 | ||
4e7a5dcd | 959 | if (ret < 0) { |
9bd2e6f8 | 960 | monc->client->auth_err = ret; |
27859f97 | 961 | } else if (!was_auth && ceph_auth_is_authenticated(monc->auth)) { |
4e7a5dcd | 962 | dout("authenticated, starting session\n"); |
0743304d | 963 | |
15d9882c AE |
964 | monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT; |
965 | monc->client->msgr.inst.name.num = | |
0cf5537b | 966 | cpu_to_le64(monc->auth->global_id); |
0743304d | 967 | |
4e7a5dcd | 968 | __send_subscribe(monc); |
f8c76f6f | 969 | __resend_generic_request(monc); |
0f9af169 ID |
970 | |
971 | pr_info("mon%d %s session established\n", monc->cur_mon, | |
972 | ceph_pr_addr(&monc->con.peer_addr.in_addr)); | |
4e7a5dcd | 973 | } |
0f9af169 ID |
974 | |
975 | out: | |
4e7a5dcd | 976 | mutex_unlock(&monc->mutex); |
0f9af169 ID |
977 | if (monc->client->auth_err < 0) |
978 | wake_up_all(&monc->client->auth_wq); | |
4e7a5dcd SW |
979 | } |
980 | ||
9bd2e6f8 SW |
981 | static int __validate_auth(struct ceph_mon_client *monc) |
982 | { | |
983 | int ret; | |
984 | ||
985 | if (monc->pending_auth) | |
986 | return 0; | |
987 | ||
988 | ret = ceph_build_auth(monc->auth, monc->m_auth->front.iov_base, | |
3cea4c30 | 989 | monc->m_auth->front_alloc_len); |
9bd2e6f8 SW |
990 | if (ret <= 0) |
991 | return ret; /* either an error, or no need to authenticate */ | |
992 | __send_prepared_auth_request(monc, ret); | |
993 | return 0; | |
994 | } | |
995 | ||
996 | int ceph_monc_validate_auth(struct ceph_mon_client *monc) | |
997 | { | |
998 | int ret; | |
999 | ||
1000 | mutex_lock(&monc->mutex); | |
1001 | ret = __validate_auth(monc); | |
1002 | mutex_unlock(&monc->mutex); | |
1003 | return ret; | |
1004 | } | |
3d14c5d2 | 1005 | EXPORT_SYMBOL(ceph_monc_validate_auth); |
9bd2e6f8 | 1006 | |
ba75bb98 SW |
1007 | /* |
1008 | * handle incoming message | |
1009 | */ | |
1010 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1011 | { | |
1012 | struct ceph_mon_client *monc = con->private; | |
1013 | int type = le16_to_cpu(msg->hdr.type); | |
1014 | ||
1015 | if (!monc) | |
1016 | return; | |
1017 | ||
1018 | switch (type) { | |
4e7a5dcd SW |
1019 | case CEPH_MSG_AUTH_REPLY: |
1020 | handle_auth_reply(monc, msg); | |
ba75bb98 SW |
1021 | break; |
1022 | ||
1023 | case CEPH_MSG_MON_SUBSCRIBE_ACK: | |
1024 | handle_subscribe_ack(monc, msg); | |
1025 | break; | |
1026 | ||
1027 | case CEPH_MSG_STATFS_REPLY: | |
1028 | handle_statfs_reply(monc, msg); | |
1029 | break; | |
1030 | ||
513a8243 ID |
1031 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
1032 | handle_get_version_reply(monc, msg); | |
1033 | break; | |
1034 | ||
4e7a5dcd SW |
1035 | case CEPH_MSG_MON_MAP: |
1036 | ceph_monc_handle_map(monc, msg); | |
1037 | break; | |
1038 | ||
ba75bb98 SW |
1039 | case CEPH_MSG_OSD_MAP: |
1040 | ceph_osdc_handle_map(&monc->client->osdc, msg); | |
1041 | break; | |
1042 | ||
1043 | default: | |
3d14c5d2 YS |
1044 | /* can the chained handler handle it? */ |
1045 | if (monc->client->extra_mon_dispatch && | |
1046 | monc->client->extra_mon_dispatch(monc->client, msg) == 0) | |
1047 | break; | |
1048 | ||
ba75bb98 SW |
1049 | pr_err("received unknown message type %d %s\n", type, |
1050 | ceph_msg_type_name(type)); | |
1051 | } | |
1052 | ceph_msg_put(msg); | |
1053 | } | |
1054 | ||
1055 | /* | |
1056 | * Allocate memory for incoming message | |
1057 | */ | |
1058 | static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, | |
2450418c YS |
1059 | struct ceph_msg_header *hdr, |
1060 | int *skip) | |
ba75bb98 SW |
1061 | { |
1062 | struct ceph_mon_client *monc = con->private; | |
1063 | int type = le16_to_cpu(hdr->type); | |
2450418c | 1064 | int front_len = le32_to_cpu(hdr->front_len); |
5b3a4db3 | 1065 | struct ceph_msg *m = NULL; |
ba75bb98 | 1066 | |
2450418c | 1067 | *skip = 0; |
0547a9b3 | 1068 | |
ba75bb98 | 1069 | switch (type) { |
ba75bb98 | 1070 | case CEPH_MSG_MON_SUBSCRIBE_ACK: |
7c315c55 | 1071 | m = ceph_msg_get(monc->m_subscribe_ack); |
2450418c | 1072 | break; |
ba75bb98 | 1073 | case CEPH_MSG_STATFS_REPLY: |
f8c76f6f | 1074 | return get_generic_reply(con, hdr, skip); |
4e7a5dcd | 1075 | case CEPH_MSG_AUTH_REPLY: |
6694d6b9 | 1076 | m = ceph_msg_get(monc->m_auth_reply); |
2450418c | 1077 | break; |
513a8243 ID |
1078 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
1079 | if (le64_to_cpu(hdr->tid) != 0) | |
1080 | return get_generic_reply(con, hdr, skip); | |
1081 | ||
1082 | /* | |
1083 | * Older OSDs don't set reply tid even if the orignal | |
1084 | * request had a non-zero tid. Workaround this weirdness | |
1085 | * by falling through to the allocate case. | |
1086 | */ | |
5b3a4db3 SW |
1087 | case CEPH_MSG_MON_MAP: |
1088 | case CEPH_MSG_MDS_MAP: | |
1089 | case CEPH_MSG_OSD_MAP: | |
b61c2763 | 1090 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); |
1c20f2d2 AE |
1091 | if (!m) |
1092 | return NULL; /* ENOMEM--return skip == 0 */ | |
5b3a4db3 | 1093 | break; |
ba75bb98 | 1094 | } |
2450418c | 1095 | |
5b3a4db3 SW |
1096 | if (!m) { |
1097 | pr_info("alloc_msg unknown type %d\n", type); | |
2450418c | 1098 | *skip = 1; |
73c3d481 | 1099 | } else if (front_len > m->front_alloc_len) { |
b9a67899 JP |
1100 | pr_warn("mon_alloc_msg front %d > prealloc %d (%u#%llu)\n", |
1101 | front_len, m->front_alloc_len, | |
1102 | (unsigned int)con->peer_name.type, | |
1103 | le64_to_cpu(con->peer_name.num)); | |
73c3d481 SW |
1104 | ceph_msg_put(m); |
1105 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); | |
5b3a4db3 | 1106 | } |
73c3d481 | 1107 | |
2450418c | 1108 | return m; |
ba75bb98 SW |
1109 | } |
1110 | ||
1111 | /* | |
1112 | * If the monitor connection resets, pick a new monitor and resubmit | |
1113 | * any pending requests. | |
1114 | */ | |
1115 | static void mon_fault(struct ceph_connection *con) | |
1116 | { | |
1117 | struct ceph_mon_client *monc = con->private; | |
1118 | ||
ba75bb98 | 1119 | mutex_lock(&monc->mutex); |
b5d91704 ID |
1120 | dout("%s mon%d\n", __func__, monc->cur_mon); |
1121 | if (monc->cur_mon >= 0) { | |
1122 | if (!monc->hunting) { | |
1123 | dout("%s hunting for new mon\n", __func__); | |
1124 | reopen_session(monc); | |
1125 | __schedule_delayed(monc); | |
1126 | } else { | |
1127 | dout("%s already hunting\n", __func__); | |
1128 | } | |
ba75bb98 | 1129 | } |
ba75bb98 SW |
1130 | mutex_unlock(&monc->mutex); |
1131 | } | |
1132 | ||
ec87ef43 SW |
1133 | /* |
1134 | * We can ignore refcounting on the connection struct, as all references | |
1135 | * will come from the messenger workqueue, which is drained prior to | |
1136 | * mon_client destruction. | |
1137 | */ | |
1138 | static struct ceph_connection *con_get(struct ceph_connection *con) | |
1139 | { | |
1140 | return con; | |
1141 | } | |
1142 | ||
1143 | static void con_put(struct ceph_connection *con) | |
1144 | { | |
1145 | } | |
1146 | ||
9e32789f | 1147 | static const struct ceph_connection_operations mon_con_ops = { |
ec87ef43 SW |
1148 | .get = con_get, |
1149 | .put = con_put, | |
ba75bb98 SW |
1150 | .dispatch = dispatch, |
1151 | .fault = mon_fault, | |
1152 | .alloc_msg = mon_alloc_msg, | |
ba75bb98 | 1153 | }; |