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++) { | |
737cc81e ID |
263 | char buf[32]; |
264 | int len; | |
82dcabad ID |
265 | |
266 | if (!monc->subs[i].want) | |
267 | continue; | |
268 | ||
737cc81e ID |
269 | len = sprintf(buf, "%s", ceph_sub_str[i]); |
270 | if (i == CEPH_SUB_MDSMAP && | |
271 | monc->fs_cluster_id != CEPH_FS_CLUSTER_ID_NONE) | |
272 | len += sprintf(buf + len, ".%d", monc->fs_cluster_id); | |
273 | ||
274 | dout("%s %s start %llu flags 0x%x\n", __func__, buf, | |
82dcabad ID |
275 | le64_to_cpu(monc->subs[i].item.start), |
276 | monc->subs[i].item.flags); | |
737cc81e | 277 | ceph_encode_string(&p, end, buf, len); |
82dcabad ID |
278 | memcpy(p, &monc->subs[i].item, sizeof(monc->subs[i].item)); |
279 | p += sizeof(monc->subs[i].item); | |
ba75bb98 | 280 | } |
82dcabad | 281 | |
737cc81e | 282 | BUG_ON(p > end); |
82dcabad ID |
283 | msg->front.iov_len = p - msg->front.iov_base; |
284 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
285 | ceph_msg_revoke(msg); | |
286 | ceph_con_send(&monc->con, ceph_msg_get(msg)); | |
ba75bb98 SW |
287 | } |
288 | ||
289 | static void handle_subscribe_ack(struct ceph_mon_client *monc, | |
290 | struct ceph_msg *msg) | |
291 | { | |
95c96174 | 292 | unsigned int seconds; |
07bd10fb SW |
293 | struct ceph_mon_subscribe_ack *h = msg->front.iov_base; |
294 | ||
295 | if (msg->front.iov_len < sizeof(*h)) | |
296 | goto bad; | |
297 | seconds = le32_to_cpu(h->duration); | |
ba75bb98 | 298 | |
ba75bb98 | 299 | mutex_lock(&monc->mutex); |
82dcabad ID |
300 | if (monc->sub_renew_sent) { |
301 | monc->sub_renew_after = monc->sub_renew_sent + | |
302 | (seconds >> 1) * HZ - 1; | |
303 | dout("%s sent %lu duration %d renew after %lu\n", __func__, | |
304 | monc->sub_renew_sent, seconds, monc->sub_renew_after); | |
305 | monc->sub_renew_sent = 0; | |
306 | } else { | |
307 | dout("%s sent %lu renew after %lu, ignoring\n", __func__, | |
308 | monc->sub_renew_sent, monc->sub_renew_after); | |
309 | } | |
ba75bb98 SW |
310 | mutex_unlock(&monc->mutex); |
311 | return; | |
312 | bad: | |
313 | pr_err("got corrupt subscribe-ack msg\n"); | |
9ec7cab1 | 314 | ceph_msg_dump(msg); |
ba75bb98 SW |
315 | } |
316 | ||
317 | /* | |
82dcabad ID |
318 | * Register interest in a map |
319 | * | |
320 | * @sub: one of CEPH_SUB_* | |
321 | * @epoch: X for "every map since X", or 0 for "just the latest" | |
ba75bb98 | 322 | */ |
82dcabad ID |
323 | static bool __ceph_monc_want_map(struct ceph_mon_client *monc, int sub, |
324 | u32 epoch, bool continuous) | |
ba75bb98 | 325 | { |
82dcabad ID |
326 | __le64 start = cpu_to_le64(epoch); |
327 | u8 flags = !continuous ? CEPH_SUBSCRIBE_ONETIME : 0; | |
328 | ||
329 | dout("%s %s epoch %u continuous %d\n", __func__, ceph_sub_str[sub], | |
330 | epoch, continuous); | |
331 | ||
332 | if (monc->subs[sub].want && | |
333 | monc->subs[sub].item.start == start && | |
334 | monc->subs[sub].item.flags == flags) | |
335 | return false; | |
336 | ||
337 | monc->subs[sub].item.start = start; | |
338 | monc->subs[sub].item.flags = flags; | |
339 | monc->subs[sub].want = true; | |
340 | ||
341 | return true; | |
342 | } | |
343 | ||
344 | bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch, | |
345 | bool continuous) | |
346 | { | |
347 | bool need_request; | |
348 | ||
ba75bb98 | 349 | mutex_lock(&monc->mutex); |
82dcabad | 350 | need_request = __ceph_monc_want_map(monc, sub, epoch, continuous); |
ba75bb98 | 351 | mutex_unlock(&monc->mutex); |
82dcabad ID |
352 | |
353 | return need_request; | |
354 | } | |
355 | EXPORT_SYMBOL(ceph_monc_want_map); | |
356 | ||
357 | /* | |
358 | * Keep track of which maps we have | |
359 | * | |
360 | * @sub: one of CEPH_SUB_* | |
361 | */ | |
362 | static void __ceph_monc_got_map(struct ceph_mon_client *monc, int sub, | |
363 | u32 epoch) | |
364 | { | |
365 | dout("%s %s epoch %u\n", __func__, ceph_sub_str[sub], epoch); | |
366 | ||
367 | if (monc->subs[sub].want) { | |
368 | if (monc->subs[sub].item.flags & CEPH_SUBSCRIBE_ONETIME) | |
369 | monc->subs[sub].want = false; | |
370 | else | |
371 | monc->subs[sub].item.start = cpu_to_le64(epoch + 1); | |
372 | } | |
373 | ||
374 | monc->subs[sub].have = epoch; | |
ba75bb98 SW |
375 | } |
376 | ||
82dcabad | 377 | void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch) |
ba75bb98 SW |
378 | { |
379 | mutex_lock(&monc->mutex); | |
82dcabad | 380 | __ceph_monc_got_map(monc, sub, epoch); |
ba75bb98 | 381 | mutex_unlock(&monc->mutex); |
ba75bb98 | 382 | } |
82dcabad | 383 | EXPORT_SYMBOL(ceph_monc_got_map); |
ba75bb98 | 384 | |
42c1b124 ID |
385 | void ceph_monc_renew_subs(struct ceph_mon_client *monc) |
386 | { | |
387 | mutex_lock(&monc->mutex); | |
388 | __send_subscribe(monc); | |
389 | mutex_unlock(&monc->mutex); | |
390 | } | |
391 | EXPORT_SYMBOL(ceph_monc_renew_subs); | |
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 | 487 | |
d0b19705 ID |
488 | dout("%s greq %p request %p reply %p\n", __func__, req, req->request, |
489 | req->reply); | |
490 | WARN_ON(!RB_EMPTY_NODE(&req->node)); | |
491 | ||
3143edd3 SW |
492 | if (req->reply) |
493 | ceph_msg_put(req->reply); | |
494 | if (req->request) | |
495 | ceph_msg_put(req->request); | |
20547567 YS |
496 | |
497 | kfree(req); | |
3143edd3 SW |
498 | } |
499 | ||
f8c76f6f | 500 | static void put_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 | 501 | { |
d0b19705 ID |
502 | if (req) |
503 | kref_put(&req->kref, release_generic_request); | |
3143edd3 SW |
504 | } |
505 | ||
f8c76f6f | 506 | static void get_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 SW |
507 | { |
508 | kref_get(&req->kref); | |
509 | } | |
510 | ||
d0b19705 ID |
511 | static struct ceph_mon_generic_request * |
512 | alloc_generic_request(struct ceph_mon_client *monc, gfp_t gfp) | |
513 | { | |
514 | struct ceph_mon_generic_request *req; | |
515 | ||
516 | req = kzalloc(sizeof(*req), gfp); | |
517 | if (!req) | |
518 | return NULL; | |
519 | ||
520 | req->monc = monc; | |
521 | kref_init(&req->kref); | |
522 | RB_CLEAR_NODE(&req->node); | |
523 | init_completion(&req->completion); | |
524 | ||
525 | dout("%s greq %p\n", __func__, req); | |
526 | return req; | |
527 | } | |
528 | ||
529 | static void register_generic_request(struct ceph_mon_generic_request *req) | |
530 | { | |
531 | struct ceph_mon_client *monc = req->monc; | |
532 | ||
533 | WARN_ON(req->tid); | |
534 | ||
535 | get_generic_request(req); | |
536 | req->tid = ++monc->last_tid; | |
537 | insert_generic_request(&monc->generic_request_tree, req); | |
538 | } | |
539 | ||
540 | static void send_generic_request(struct ceph_mon_client *monc, | |
541 | struct ceph_mon_generic_request *req) | |
542 | { | |
543 | WARN_ON(!req->tid); | |
544 | ||
545 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
546 | req->request->hdr.tid = cpu_to_le64(req->tid); | |
547 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); | |
548 | } | |
549 | ||
550 | static void __finish_generic_request(struct ceph_mon_generic_request *req) | |
551 | { | |
552 | struct ceph_mon_client *monc = req->monc; | |
553 | ||
554 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
555 | erase_generic_request(&monc->generic_request_tree, req); | |
556 | ||
557 | ceph_msg_revoke(req->request); | |
558 | ceph_msg_revoke_incoming(req->reply); | |
559 | } | |
560 | ||
561 | static void finish_generic_request(struct ceph_mon_generic_request *req) | |
562 | { | |
563 | __finish_generic_request(req); | |
564 | put_generic_request(req); | |
565 | } | |
566 | ||
567 | static void complete_generic_request(struct ceph_mon_generic_request *req) | |
568 | { | |
569 | if (req->complete_cb) | |
570 | req->complete_cb(req); | |
571 | else | |
572 | complete_all(&req->completion); | |
573 | put_generic_request(req); | |
574 | } | |
575 | ||
576 | void cancel_generic_request(struct ceph_mon_generic_request *req) | |
577 | { | |
578 | struct ceph_mon_client *monc = req->monc; | |
579 | struct ceph_mon_generic_request *lookup_req; | |
580 | ||
581 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
582 | ||
583 | mutex_lock(&monc->mutex); | |
584 | lookup_req = lookup_generic_request(&monc->generic_request_tree, | |
585 | req->tid); | |
586 | if (lookup_req) { | |
587 | WARN_ON(lookup_req != req); | |
588 | finish_generic_request(req); | |
589 | } | |
590 | ||
591 | mutex_unlock(&monc->mutex); | |
592 | } | |
593 | ||
594 | static int wait_generic_request(struct ceph_mon_generic_request *req) | |
595 | { | |
596 | int ret; | |
597 | ||
598 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
599 | ret = wait_for_completion_interruptible(&req->completion); | |
600 | if (ret) | |
601 | cancel_generic_request(req); | |
602 | else | |
603 | ret = req->result; /* completed */ | |
604 | ||
605 | return ret; | |
606 | } | |
607 | ||
f8c76f6f | 608 | static struct ceph_msg *get_generic_reply(struct ceph_connection *con, |
3143edd3 SW |
609 | struct ceph_msg_header *hdr, |
610 | int *skip) | |
611 | { | |
612 | struct ceph_mon_client *monc = con->private; | |
f8c76f6f | 613 | struct ceph_mon_generic_request *req; |
3143edd3 SW |
614 | u64 tid = le64_to_cpu(hdr->tid); |
615 | struct ceph_msg *m; | |
616 | ||
617 | mutex_lock(&monc->mutex); | |
fcd00b68 | 618 | req = lookup_generic_request(&monc->generic_request_tree, tid); |
3143edd3 | 619 | if (!req) { |
f8c76f6f | 620 | dout("get_generic_reply %lld dne\n", tid); |
3143edd3 SW |
621 | *skip = 1; |
622 | m = NULL; | |
623 | } else { | |
f8c76f6f | 624 | dout("get_generic_reply %lld got %p\n", tid, req->reply); |
1c20f2d2 | 625 | *skip = 0; |
3143edd3 SW |
626 | m = ceph_msg_get(req->reply); |
627 | /* | |
628 | * we don't need to track the connection reading into | |
629 | * this reply because we only have one open connection | |
630 | * at a time, ever. | |
631 | */ | |
632 | } | |
633 | mutex_unlock(&monc->mutex); | |
634 | return m; | |
635 | } | |
636 | ||
e56fa10e YS |
637 | /* |
638 | * statfs | |
639 | */ | |
ba75bb98 SW |
640 | static void handle_statfs_reply(struct ceph_mon_client *monc, |
641 | struct ceph_msg *msg) | |
642 | { | |
f8c76f6f | 643 | struct ceph_mon_generic_request *req; |
ba75bb98 | 644 | struct ceph_mon_statfs_reply *reply = msg->front.iov_base; |
3143edd3 | 645 | u64 tid = le64_to_cpu(msg->hdr.tid); |
ba75bb98 | 646 | |
d0b19705 ID |
647 | dout("%s msg %p tid %llu\n", __func__, msg, tid); |
648 | ||
ba75bb98 SW |
649 | if (msg->front.iov_len != sizeof(*reply)) |
650 | goto bad; | |
ba75bb98 SW |
651 | |
652 | mutex_lock(&monc->mutex); | |
fcd00b68 | 653 | req = lookup_generic_request(&monc->generic_request_tree, tid); |
d0b19705 ID |
654 | if (!req) { |
655 | mutex_unlock(&monc->mutex); | |
656 | return; | |
ba75bb98 | 657 | } |
d0b19705 ID |
658 | |
659 | req->result = 0; | |
660 | *req->u.st = reply->st; /* struct */ | |
661 | __finish_generic_request(req); | |
ba75bb98 | 662 | mutex_unlock(&monc->mutex); |
d0b19705 ID |
663 | |
664 | complete_generic_request(req); | |
ba75bb98 SW |
665 | return; |
666 | ||
667 | bad: | |
7a6fdeb2 | 668 | pr_err("corrupt statfs reply, tid %llu\n", tid); |
9ec7cab1 | 669 | ceph_msg_dump(msg); |
ba75bb98 SW |
670 | } |
671 | ||
672 | /* | |
3143edd3 | 673 | * Do a synchronous statfs(). |
ba75bb98 | 674 | */ |
3143edd3 | 675 | int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf) |
ba75bb98 | 676 | { |
f8c76f6f | 677 | struct ceph_mon_generic_request *req; |
ba75bb98 | 678 | struct ceph_mon_statfs *h; |
d0b19705 | 679 | int ret = -ENOMEM; |
3143edd3 | 680 | |
d0b19705 | 681 | req = alloc_generic_request(monc, GFP_NOFS); |
3143edd3 | 682 | if (!req) |
d0b19705 | 683 | goto out; |
ba75bb98 | 684 | |
b61c2763 SW |
685 | req->request = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), GFP_NOFS, |
686 | true); | |
a79832f2 | 687 | if (!req->request) |
3143edd3 | 688 | goto out; |
d0b19705 ID |
689 | |
690 | req->reply = ceph_msg_new(CEPH_MSG_STATFS_REPLY, 64, GFP_NOFS, true); | |
a79832f2 | 691 | if (!req->reply) |
3143edd3 | 692 | goto out; |
3143edd3 | 693 | |
d0b19705 ID |
694 | req->u.st = buf; |
695 | ||
696 | mutex_lock(&monc->mutex); | |
697 | register_generic_request(req); | |
3143edd3 SW |
698 | /* fill out request */ |
699 | h = req->request->front.iov_base; | |
13e38c8a SW |
700 | h->monhdr.have_version = 0; |
701 | h->monhdr.session_mon = cpu_to_le16(-1); | |
702 | h->monhdr.session_mon_tid = 0; | |
ba75bb98 | 703 | h->fsid = monc->monmap->fsid; |
d0b19705 ID |
704 | send_generic_request(monc, req); |
705 | mutex_unlock(&monc->mutex); | |
ba75bb98 | 706 | |
d0b19705 | 707 | ret = wait_generic_request(req); |
e56fa10e | 708 | out: |
f646912d | 709 | put_generic_request(req); |
d0b19705 | 710 | return ret; |
e56fa10e | 711 | } |
3d14c5d2 | 712 | EXPORT_SYMBOL(ceph_monc_do_statfs); |
e56fa10e | 713 | |
513a8243 ID |
714 | static void handle_get_version_reply(struct ceph_mon_client *monc, |
715 | struct ceph_msg *msg) | |
716 | { | |
717 | struct ceph_mon_generic_request *req; | |
718 | u64 tid = le64_to_cpu(msg->hdr.tid); | |
719 | void *p = msg->front.iov_base; | |
720 | void *end = p + msg->front_alloc_len; | |
721 | u64 handle; | |
722 | ||
d0b19705 | 723 | dout("%s msg %p tid %llu\n", __func__, msg, tid); |
513a8243 ID |
724 | |
725 | ceph_decode_need(&p, end, 2*sizeof(u64), bad); | |
726 | handle = ceph_decode_64(&p); | |
727 | if (tid != 0 && tid != handle) | |
728 | goto bad; | |
729 | ||
730 | mutex_lock(&monc->mutex); | |
fcd00b68 | 731 | req = lookup_generic_request(&monc->generic_request_tree, handle); |
d0b19705 ID |
732 | if (!req) { |
733 | mutex_unlock(&monc->mutex); | |
734 | return; | |
513a8243 | 735 | } |
d0b19705 ID |
736 | |
737 | req->result = 0; | |
738 | req->u.newest = ceph_decode_64(&p); | |
739 | __finish_generic_request(req); | |
513a8243 | 740 | mutex_unlock(&monc->mutex); |
513a8243 | 741 | |
d0b19705 | 742 | complete_generic_request(req); |
513a8243 | 743 | return; |
d0b19705 | 744 | |
513a8243 | 745 | bad: |
7a6fdeb2 | 746 | pr_err("corrupt mon_get_version reply, tid %llu\n", tid); |
513a8243 ID |
747 | ceph_msg_dump(msg); |
748 | } | |
749 | ||
d0b19705 ID |
750 | static struct ceph_mon_generic_request * |
751 | __ceph_monc_get_version(struct ceph_mon_client *monc, const char *what, | |
752 | ceph_monc_callback_t cb, u64 private_data) | |
513a8243 ID |
753 | { |
754 | struct ceph_mon_generic_request *req; | |
513a8243 | 755 | |
d0b19705 | 756 | req = alloc_generic_request(monc, GFP_NOIO); |
513a8243 | 757 | if (!req) |
d0b19705 | 758 | goto err_put_req; |
513a8243 ID |
759 | |
760 | req->request = ceph_msg_new(CEPH_MSG_MON_GET_VERSION, | |
761 | sizeof(u64) + sizeof(u32) + strlen(what), | |
d0b19705 ID |
762 | GFP_NOIO, true); |
763 | if (!req->request) | |
764 | goto err_put_req; | |
513a8243 | 765 | |
d0b19705 ID |
766 | req->reply = ceph_msg_new(CEPH_MSG_MON_GET_VERSION_REPLY, 32, GFP_NOIO, |
767 | true); | |
768 | if (!req->reply) | |
769 | goto err_put_req; | |
513a8243 | 770 | |
d0b19705 ID |
771 | req->complete_cb = cb; |
772 | req->private_data = private_data; | |
513a8243 | 773 | |
513a8243 | 774 | mutex_lock(&monc->mutex); |
d0b19705 ID |
775 | register_generic_request(req); |
776 | { | |
777 | void *p = req->request->front.iov_base; | |
778 | void *const end = p + req->request->front_alloc_len; | |
779 | ||
780 | ceph_encode_64(&p, req->tid); /* handle */ | |
781 | ceph_encode_string(&p, end, what, strlen(what)); | |
782 | WARN_ON(p != end); | |
783 | } | |
784 | send_generic_request(monc, req); | |
785 | mutex_unlock(&monc->mutex); | |
513a8243 | 786 | |
d0b19705 | 787 | return req; |
513a8243 | 788 | |
d0b19705 | 789 | err_put_req: |
f646912d | 790 | put_generic_request(req); |
d0b19705 | 791 | return ERR_PTR(-ENOMEM); |
513a8243 | 792 | } |
d0b19705 ID |
793 | |
794 | /* | |
795 | * Send MMonGetVersion and wait for the reply. | |
796 | * | |
797 | * @what: one of "mdsmap", "osdmap" or "monmap" | |
798 | */ | |
799 | int ceph_monc_get_version(struct ceph_mon_client *monc, const char *what, | |
800 | u64 *newest) | |
801 | { | |
802 | struct ceph_mon_generic_request *req; | |
803 | int ret; | |
804 | ||
805 | req = __ceph_monc_get_version(monc, what, NULL, 0); | |
806 | if (IS_ERR(req)) | |
807 | return PTR_ERR(req); | |
808 | ||
809 | ret = wait_generic_request(req); | |
810 | if (!ret) | |
811 | *newest = req->u.newest; | |
812 | ||
813 | put_generic_request(req); | |
814 | return ret; | |
815 | } | |
816 | EXPORT_SYMBOL(ceph_monc_get_version); | |
817 | ||
818 | /* | |
819 | * Send MMonGetVersion, | |
820 | * | |
821 | * @what: one of "mdsmap", "osdmap" or "monmap" | |
822 | */ | |
823 | int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what, | |
824 | ceph_monc_callback_t cb, u64 private_data) | |
825 | { | |
826 | struct ceph_mon_generic_request *req; | |
827 | ||
828 | req = __ceph_monc_get_version(monc, what, cb, private_data); | |
829 | if (IS_ERR(req)) | |
830 | return PTR_ERR(req); | |
831 | ||
832 | put_generic_request(req); | |
833 | return 0; | |
834 | } | |
835 | EXPORT_SYMBOL(ceph_monc_get_version_async); | |
513a8243 | 836 | |
ba75bb98 | 837 | /* |
e56fa10e | 838 | * Resend pending generic requests. |
ba75bb98 | 839 | */ |
f8c76f6f | 840 | static void __resend_generic_request(struct ceph_mon_client *monc) |
ba75bb98 | 841 | { |
f8c76f6f | 842 | struct ceph_mon_generic_request *req; |
85ff03f6 | 843 | struct rb_node *p; |
ba75bb98 | 844 | |
f8c76f6f YS |
845 | for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) { |
846 | req = rb_entry(p, struct ceph_mon_generic_request, node); | |
6740a845 | 847 | ceph_msg_revoke(req->request); |
4f471e4a | 848 | ceph_msg_revoke_incoming(req->reply); |
67130934 | 849 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
ba75bb98 SW |
850 | } |
851 | } | |
852 | ||
853 | /* | |
854 | * Delayed work. If we haven't mounted yet, retry. Otherwise, | |
855 | * renew/retry subscription as needed (in case it is timing out, or we | |
856 | * got an ENOMEM). And keep the monitor connection alive. | |
857 | */ | |
858 | static void delayed_work(struct work_struct *work) | |
859 | { | |
860 | struct ceph_mon_client *monc = | |
861 | container_of(work, struct ceph_mon_client, delayed_work.work); | |
862 | ||
863 | dout("monc delayed_work\n"); | |
864 | mutex_lock(&monc->mutex); | |
4e7a5dcd | 865 | if (monc->hunting) { |
1752b50c ID |
866 | dout("%s continuing hunt\n", __func__); |
867 | reopen_session(monc); | |
ba75bb98 | 868 | } else { |
8b9558aa YZ |
869 | int is_auth = ceph_auth_is_authenticated(monc->auth); |
870 | if (ceph_con_keepalive_expired(&monc->con, | |
58d81b12 | 871 | CEPH_MONC_PING_TIMEOUT)) { |
8b9558aa YZ |
872 | dout("monc keepalive timeout\n"); |
873 | is_auth = 0; | |
1752b50c | 874 | reopen_session(monc); |
8b9558aa | 875 | } |
9bd2e6f8 | 876 | |
8b9558aa YZ |
877 | if (!monc->hunting) { |
878 | ceph_con_keepalive(&monc->con); | |
879 | __validate_auth(monc); | |
880 | } | |
9bd2e6f8 | 881 | |
82dcabad ID |
882 | if (is_auth) { |
883 | unsigned long now = jiffies; | |
884 | ||
885 | dout("%s renew subs? now %lu renew after %lu\n", | |
886 | __func__, now, monc->sub_renew_after); | |
887 | if (time_after_eq(now, monc->sub_renew_after)) | |
888 | __send_subscribe(monc); | |
889 | } | |
ba75bb98 | 890 | } |
ba75bb98 SW |
891 | __schedule_delayed(monc); |
892 | mutex_unlock(&monc->mutex); | |
893 | } | |
894 | ||
6b805185 SW |
895 | /* |
896 | * On startup, we build a temporary monmap populated with the IPs | |
897 | * provided by mount(2). | |
898 | */ | |
899 | static int build_initial_monmap(struct ceph_mon_client *monc) | |
900 | { | |
3d14c5d2 YS |
901 | struct ceph_options *opt = monc->client->options; |
902 | struct ceph_entity_addr *mon_addr = opt->mon_addr; | |
903 | int num_mon = opt->num_mon; | |
6b805185 SW |
904 | int i; |
905 | ||
906 | /* build initial monmap */ | |
907 | monc->monmap = kzalloc(sizeof(*monc->monmap) + | |
908 | num_mon*sizeof(monc->monmap->mon_inst[0]), | |
909 | GFP_KERNEL); | |
910 | if (!monc->monmap) | |
911 | return -ENOMEM; | |
912 | for (i = 0; i < num_mon; i++) { | |
913 | monc->monmap->mon_inst[i].addr = mon_addr[i]; | |
6b805185 SW |
914 | monc->monmap->mon_inst[i].addr.nonce = 0; |
915 | monc->monmap->mon_inst[i].name.type = | |
916 | CEPH_ENTITY_TYPE_MON; | |
917 | monc->monmap->mon_inst[i].name.num = cpu_to_le64(i); | |
918 | } | |
919 | monc->monmap->num_mon = num_mon; | |
6b805185 SW |
920 | return 0; |
921 | } | |
922 | ||
ba75bb98 SW |
923 | int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl) |
924 | { | |
925 | int err = 0; | |
926 | ||
927 | dout("init\n"); | |
928 | memset(monc, 0, sizeof(*monc)); | |
929 | monc->client = cl; | |
930 | monc->monmap = NULL; | |
931 | mutex_init(&monc->mutex); | |
932 | ||
6b805185 SW |
933 | err = build_initial_monmap(monc); |
934 | if (err) | |
935 | goto out; | |
936 | ||
f6a2f5be | 937 | /* connection */ |
4e7a5dcd | 938 | /* authentication */ |
3d14c5d2 | 939 | monc->auth = ceph_auth_init(cl->options->name, |
8323c3aa | 940 | cl->options->key); |
49d9224c NW |
941 | if (IS_ERR(monc->auth)) { |
942 | err = PTR_ERR(monc->auth); | |
67130934 | 943 | goto out_monmap; |
49d9224c | 944 | } |
4e7a5dcd SW |
945 | monc->auth->want_keys = |
946 | CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON | | |
947 | CEPH_ENTITY_TYPE_OSD | CEPH_ENTITY_TYPE_MDS; | |
948 | ||
240ed68e | 949 | /* msgs */ |
a79832f2 | 950 | err = -ENOMEM; |
7c315c55 | 951 | monc->m_subscribe_ack = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE_ACK, |
34d23762 | 952 | sizeof(struct ceph_mon_subscribe_ack), |
b61c2763 | 953 | GFP_NOFS, true); |
a79832f2 | 954 | if (!monc->m_subscribe_ack) |
49d9224c | 955 | goto out_auth; |
6694d6b9 | 956 | |
737cc81e | 957 | monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 128, GFP_NOFS, |
b61c2763 | 958 | true); |
240ed68e SW |
959 | if (!monc->m_subscribe) |
960 | goto out_subscribe_ack; | |
961 | ||
b61c2763 SW |
962 | monc->m_auth_reply = ceph_msg_new(CEPH_MSG_AUTH_REPLY, 4096, GFP_NOFS, |
963 | true); | |
a79832f2 | 964 | if (!monc->m_auth_reply) |
240ed68e | 965 | goto out_subscribe; |
4e7a5dcd | 966 | |
b61c2763 | 967 | monc->m_auth = ceph_msg_new(CEPH_MSG_AUTH, 4096, GFP_NOFS, true); |
9bd2e6f8 | 968 | monc->pending_auth = 0; |
a79832f2 | 969 | if (!monc->m_auth) |
6694d6b9 | 970 | goto out_auth_reply; |
ba75bb98 | 971 | |
735a72ef SW |
972 | ceph_con_init(&monc->con, monc, &mon_con_ops, |
973 | &monc->client->msgr); | |
974 | ||
ba75bb98 | 975 | monc->cur_mon = -1; |
168b9090 ID |
976 | monc->had_a_connection = false; |
977 | monc->hunt_mult = 1; | |
ba75bb98 SW |
978 | |
979 | INIT_DELAYED_WORK(&monc->delayed_work, delayed_work); | |
f8c76f6f | 980 | monc->generic_request_tree = RB_ROOT; |
ba75bb98 SW |
981 | monc->last_tid = 0; |
982 | ||
737cc81e ID |
983 | monc->fs_cluster_id = CEPH_FS_CLUSTER_ID_NONE; |
984 | ||
4e7a5dcd SW |
985 | return 0; |
986 | ||
6694d6b9 SW |
987 | out_auth_reply: |
988 | ceph_msg_put(monc->m_auth_reply); | |
240ed68e SW |
989 | out_subscribe: |
990 | ceph_msg_put(monc->m_subscribe); | |
7c315c55 SW |
991 | out_subscribe_ack: |
992 | ceph_msg_put(monc->m_subscribe_ack); | |
49d9224c NW |
993 | out_auth: |
994 | ceph_auth_destroy(monc->auth); | |
4e7a5dcd SW |
995 | out_monmap: |
996 | kfree(monc->monmap); | |
ba75bb98 SW |
997 | out: |
998 | return err; | |
999 | } | |
3d14c5d2 | 1000 | EXPORT_SYMBOL(ceph_monc_init); |
ba75bb98 SW |
1001 | |
1002 | void ceph_monc_stop(struct ceph_mon_client *monc) | |
1003 | { | |
1004 | dout("stop\n"); | |
1005 | cancel_delayed_work_sync(&monc->delayed_work); | |
1006 | ||
1007 | mutex_lock(&monc->mutex); | |
1008 | __close_session(monc); | |
0e04dc26 | 1009 | monc->cur_mon = -1; |
ba75bb98 SW |
1010 | mutex_unlock(&monc->mutex); |
1011 | ||
f3dea7ed SW |
1012 | /* |
1013 | * flush msgr queue before we destroy ourselves to ensure that: | |
1014 | * - any work that references our embedded con is finished. | |
1015 | * - any osd_client or other work that may reference an authorizer | |
1016 | * finishes before we shut down the auth subsystem. | |
1017 | */ | |
1018 | ceph_msgr_flush(); | |
1019 | ||
4e7a5dcd SW |
1020 | ceph_auth_destroy(monc->auth); |
1021 | ||
d0b19705 ID |
1022 | WARN_ON(!RB_EMPTY_ROOT(&monc->generic_request_tree)); |
1023 | ||
4e7a5dcd | 1024 | ceph_msg_put(monc->m_auth); |
6694d6b9 | 1025 | ceph_msg_put(monc->m_auth_reply); |
240ed68e | 1026 | ceph_msg_put(monc->m_subscribe); |
7c315c55 | 1027 | ceph_msg_put(monc->m_subscribe_ack); |
ba75bb98 SW |
1028 | |
1029 | kfree(monc->monmap); | |
1030 | } | |
3d14c5d2 | 1031 | EXPORT_SYMBOL(ceph_monc_stop); |
ba75bb98 | 1032 | |
0f9af169 ID |
1033 | static void finish_hunting(struct ceph_mon_client *monc) |
1034 | { | |
1035 | if (monc->hunting) { | |
1036 | dout("%s found mon%d\n", __func__, monc->cur_mon); | |
1037 | monc->hunting = false; | |
168b9090 ID |
1038 | monc->had_a_connection = true; |
1039 | monc->hunt_mult /= 2; /* reduce by 50% */ | |
1040 | if (monc->hunt_mult < 1) | |
1041 | monc->hunt_mult = 1; | |
0f9af169 ID |
1042 | } |
1043 | } | |
1044 | ||
4e7a5dcd SW |
1045 | static void handle_auth_reply(struct ceph_mon_client *monc, |
1046 | struct ceph_msg *msg) | |
1047 | { | |
1048 | int ret; | |
09c4d6a7 | 1049 | int was_auth = 0; |
4e7a5dcd SW |
1050 | |
1051 | mutex_lock(&monc->mutex); | |
27859f97 | 1052 | was_auth = ceph_auth_is_authenticated(monc->auth); |
9bd2e6f8 | 1053 | monc->pending_auth = 0; |
4e7a5dcd SW |
1054 | ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base, |
1055 | msg->front.iov_len, | |
1056 | monc->m_auth->front.iov_base, | |
3cea4c30 | 1057 | monc->m_auth->front_alloc_len); |
0f9af169 ID |
1058 | if (ret > 0) { |
1059 | __send_prepared_auth_request(monc, ret); | |
1060 | goto out; | |
1061 | } | |
1062 | ||
1063 | finish_hunting(monc); | |
1064 | ||
4e7a5dcd | 1065 | if (ret < 0) { |
9bd2e6f8 | 1066 | monc->client->auth_err = ret; |
27859f97 | 1067 | } else if (!was_auth && ceph_auth_is_authenticated(monc->auth)) { |
4e7a5dcd | 1068 | dout("authenticated, starting session\n"); |
0743304d | 1069 | |
15d9882c AE |
1070 | monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT; |
1071 | monc->client->msgr.inst.name.num = | |
0cf5537b | 1072 | cpu_to_le64(monc->auth->global_id); |
0743304d | 1073 | |
4e7a5dcd | 1074 | __send_subscribe(monc); |
f8c76f6f | 1075 | __resend_generic_request(monc); |
0f9af169 ID |
1076 | |
1077 | pr_info("mon%d %s session established\n", monc->cur_mon, | |
1078 | ceph_pr_addr(&monc->con.peer_addr.in_addr)); | |
4e7a5dcd | 1079 | } |
0f9af169 ID |
1080 | |
1081 | out: | |
4e7a5dcd | 1082 | mutex_unlock(&monc->mutex); |
0f9af169 ID |
1083 | if (monc->client->auth_err < 0) |
1084 | wake_up_all(&monc->client->auth_wq); | |
4e7a5dcd SW |
1085 | } |
1086 | ||
9bd2e6f8 SW |
1087 | static int __validate_auth(struct ceph_mon_client *monc) |
1088 | { | |
1089 | int ret; | |
1090 | ||
1091 | if (monc->pending_auth) | |
1092 | return 0; | |
1093 | ||
1094 | ret = ceph_build_auth(monc->auth, monc->m_auth->front.iov_base, | |
3cea4c30 | 1095 | monc->m_auth->front_alloc_len); |
9bd2e6f8 SW |
1096 | if (ret <= 0) |
1097 | return ret; /* either an error, or no need to authenticate */ | |
1098 | __send_prepared_auth_request(monc, ret); | |
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | int ceph_monc_validate_auth(struct ceph_mon_client *monc) | |
1103 | { | |
1104 | int ret; | |
1105 | ||
1106 | mutex_lock(&monc->mutex); | |
1107 | ret = __validate_auth(monc); | |
1108 | mutex_unlock(&monc->mutex); | |
1109 | return ret; | |
1110 | } | |
3d14c5d2 | 1111 | EXPORT_SYMBOL(ceph_monc_validate_auth); |
9bd2e6f8 | 1112 | |
ba75bb98 SW |
1113 | /* |
1114 | * handle incoming message | |
1115 | */ | |
1116 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1117 | { | |
1118 | struct ceph_mon_client *monc = con->private; | |
1119 | int type = le16_to_cpu(msg->hdr.type); | |
1120 | ||
1121 | if (!monc) | |
1122 | return; | |
1123 | ||
1124 | switch (type) { | |
4e7a5dcd SW |
1125 | case CEPH_MSG_AUTH_REPLY: |
1126 | handle_auth_reply(monc, msg); | |
ba75bb98 SW |
1127 | break; |
1128 | ||
1129 | case CEPH_MSG_MON_SUBSCRIBE_ACK: | |
1130 | handle_subscribe_ack(monc, msg); | |
1131 | break; | |
1132 | ||
1133 | case CEPH_MSG_STATFS_REPLY: | |
1134 | handle_statfs_reply(monc, msg); | |
1135 | break; | |
1136 | ||
513a8243 ID |
1137 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
1138 | handle_get_version_reply(monc, msg); | |
1139 | break; | |
1140 | ||
4e7a5dcd SW |
1141 | case CEPH_MSG_MON_MAP: |
1142 | ceph_monc_handle_map(monc, msg); | |
1143 | break; | |
1144 | ||
ba75bb98 SW |
1145 | case CEPH_MSG_OSD_MAP: |
1146 | ceph_osdc_handle_map(&monc->client->osdc, msg); | |
1147 | break; | |
1148 | ||
1149 | default: | |
3d14c5d2 YS |
1150 | /* can the chained handler handle it? */ |
1151 | if (monc->client->extra_mon_dispatch && | |
1152 | monc->client->extra_mon_dispatch(monc->client, msg) == 0) | |
1153 | break; | |
1154 | ||
ba75bb98 SW |
1155 | pr_err("received unknown message type %d %s\n", type, |
1156 | ceph_msg_type_name(type)); | |
1157 | } | |
1158 | ceph_msg_put(msg); | |
1159 | } | |
1160 | ||
1161 | /* | |
1162 | * Allocate memory for incoming message | |
1163 | */ | |
1164 | static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, | |
2450418c YS |
1165 | struct ceph_msg_header *hdr, |
1166 | int *skip) | |
ba75bb98 SW |
1167 | { |
1168 | struct ceph_mon_client *monc = con->private; | |
1169 | int type = le16_to_cpu(hdr->type); | |
2450418c | 1170 | int front_len = le32_to_cpu(hdr->front_len); |
5b3a4db3 | 1171 | struct ceph_msg *m = NULL; |
ba75bb98 | 1172 | |
2450418c | 1173 | *skip = 0; |
0547a9b3 | 1174 | |
ba75bb98 | 1175 | switch (type) { |
ba75bb98 | 1176 | case CEPH_MSG_MON_SUBSCRIBE_ACK: |
7c315c55 | 1177 | m = ceph_msg_get(monc->m_subscribe_ack); |
2450418c | 1178 | break; |
ba75bb98 | 1179 | case CEPH_MSG_STATFS_REPLY: |
f8c76f6f | 1180 | return get_generic_reply(con, hdr, skip); |
4e7a5dcd | 1181 | case CEPH_MSG_AUTH_REPLY: |
6694d6b9 | 1182 | m = ceph_msg_get(monc->m_auth_reply); |
2450418c | 1183 | break; |
513a8243 ID |
1184 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
1185 | if (le64_to_cpu(hdr->tid) != 0) | |
1186 | return get_generic_reply(con, hdr, skip); | |
1187 | ||
1188 | /* | |
1189 | * Older OSDs don't set reply tid even if the orignal | |
1190 | * request had a non-zero tid. Workaround this weirdness | |
1191 | * by falling through to the allocate case. | |
1192 | */ | |
5b3a4db3 SW |
1193 | case CEPH_MSG_MON_MAP: |
1194 | case CEPH_MSG_MDS_MAP: | |
1195 | case CEPH_MSG_OSD_MAP: | |
b61c2763 | 1196 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); |
1c20f2d2 AE |
1197 | if (!m) |
1198 | return NULL; /* ENOMEM--return skip == 0 */ | |
5b3a4db3 | 1199 | break; |
ba75bb98 | 1200 | } |
2450418c | 1201 | |
5b3a4db3 SW |
1202 | if (!m) { |
1203 | pr_info("alloc_msg unknown type %d\n", type); | |
2450418c | 1204 | *skip = 1; |
73c3d481 | 1205 | } else if (front_len > m->front_alloc_len) { |
b9a67899 JP |
1206 | pr_warn("mon_alloc_msg front %d > prealloc %d (%u#%llu)\n", |
1207 | front_len, m->front_alloc_len, | |
1208 | (unsigned int)con->peer_name.type, | |
1209 | le64_to_cpu(con->peer_name.num)); | |
73c3d481 SW |
1210 | ceph_msg_put(m); |
1211 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); | |
5b3a4db3 | 1212 | } |
73c3d481 | 1213 | |
2450418c | 1214 | return m; |
ba75bb98 SW |
1215 | } |
1216 | ||
1217 | /* | |
1218 | * If the monitor connection resets, pick a new monitor and resubmit | |
1219 | * any pending requests. | |
1220 | */ | |
1221 | static void mon_fault(struct ceph_connection *con) | |
1222 | { | |
1223 | struct ceph_mon_client *monc = con->private; | |
1224 | ||
ba75bb98 | 1225 | mutex_lock(&monc->mutex); |
b5d91704 ID |
1226 | dout("%s mon%d\n", __func__, monc->cur_mon); |
1227 | if (monc->cur_mon >= 0) { | |
1228 | if (!monc->hunting) { | |
1229 | dout("%s hunting for new mon\n", __func__); | |
1230 | reopen_session(monc); | |
1231 | __schedule_delayed(monc); | |
1232 | } else { | |
1233 | dout("%s already hunting\n", __func__); | |
1234 | } | |
ba75bb98 | 1235 | } |
ba75bb98 SW |
1236 | mutex_unlock(&monc->mutex); |
1237 | } | |
1238 | ||
ec87ef43 SW |
1239 | /* |
1240 | * We can ignore refcounting on the connection struct, as all references | |
1241 | * will come from the messenger workqueue, which is drained prior to | |
1242 | * mon_client destruction. | |
1243 | */ | |
1244 | static struct ceph_connection *con_get(struct ceph_connection *con) | |
1245 | { | |
1246 | return con; | |
1247 | } | |
1248 | ||
1249 | static void con_put(struct ceph_connection *con) | |
1250 | { | |
1251 | } | |
1252 | ||
9e32789f | 1253 | static const struct ceph_connection_operations mon_con_ops = { |
ec87ef43 SW |
1254 | .get = con_get, |
1255 | .put = con_put, | |
ba75bb98 SW |
1256 | .dispatch = dispatch, |
1257 | .fault = mon_fault, | |
1258 | .alloc_msg = mon_alloc_msg, | |
ba75bb98 | 1259 | }; |