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Commit | Line | Data |
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3d14c5d2 | 1 | #include <linux/ceph/ceph_debug.h> |
ba75bb98 | 2 | |
3d14c5d2 | 3 | #include <linux/module.h> |
ba75bb98 | 4 | #include <linux/types.h> |
5a0e3ad6 | 5 | #include <linux/slab.h> |
ba75bb98 SW |
6 | #include <linux/random.h> |
7 | #include <linux/sched.h> | |
8 | ||
3d14c5d2 YS |
9 | #include <linux/ceph/mon_client.h> |
10 | #include <linux/ceph/libceph.h> | |
ab434b60 | 11 | #include <linux/ceph/debugfs.h> |
3d14c5d2 | 12 | #include <linux/ceph/decode.h> |
3d14c5d2 | 13 | #include <linux/ceph/auth.h> |
ba75bb98 SW |
14 | |
15 | /* | |
16 | * Interact with Ceph monitor cluster. Handle requests for new map | |
17 | * versions, and periodically resend as needed. Also implement | |
18 | * statfs() and umount(). | |
19 | * | |
20 | * A small cluster of Ceph "monitors" are responsible for managing critical | |
21 | * cluster configuration and state information. An odd number (e.g., 3, 5) | |
22 | * of cmon daemons use a modified version of the Paxos part-time parliament | |
23 | * algorithm to manage the MDS map (mds cluster membership), OSD map, and | |
24 | * list of clients who have mounted the file system. | |
25 | * | |
26 | * We maintain an open, active session with a monitor at all times in order to | |
27 | * receive timely MDSMap updates. We periodically send a keepalive byte on the | |
28 | * TCP socket to ensure we detect a failure. If the connection does break, we | |
29 | * randomly hunt for a new monitor. Once the connection is reestablished, we | |
30 | * resend any outstanding requests. | |
31 | */ | |
32 | ||
9e32789f | 33 | static const struct ceph_connection_operations mon_con_ops; |
ba75bb98 | 34 | |
9bd2e6f8 SW |
35 | static int __validate_auth(struct ceph_mon_client *monc); |
36 | ||
ba75bb98 SW |
37 | /* |
38 | * Decode a monmap blob (e.g., during mount). | |
39 | */ | |
40 | struct ceph_monmap *ceph_monmap_decode(void *p, void *end) | |
41 | { | |
42 | struct ceph_monmap *m = NULL; | |
43 | int i, err = -EINVAL; | |
44 | struct ceph_fsid fsid; | |
45 | u32 epoch, num_mon; | |
4e7a5dcd SW |
46 | u32 len; |
47 | ||
48 | ceph_decode_32_safe(&p, end, len, bad); | |
49 | ceph_decode_need(&p, end, len, bad); | |
ba75bb98 SW |
50 | |
51 | dout("monmap_decode %p %p len %d\n", p, end, (int)(end-p)); | |
f3b4e55d | 52 | p += sizeof(u16); /* skip version */ |
ba75bb98 SW |
53 | |
54 | ceph_decode_need(&p, end, sizeof(fsid) + 2*sizeof(u32), bad); | |
55 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
c89136ea | 56 | epoch = ceph_decode_32(&p); |
ba75bb98 | 57 | |
c89136ea | 58 | num_mon = ceph_decode_32(&p); |
ba75bb98 SW |
59 | ceph_decode_need(&p, end, num_mon*sizeof(m->mon_inst[0]), bad); |
60 | ||
61 | if (num_mon >= CEPH_MAX_MON) | |
62 | goto bad; | |
63 | m = kmalloc(sizeof(*m) + sizeof(m->mon_inst[0])*num_mon, GFP_NOFS); | |
64 | if (m == NULL) | |
65 | return ERR_PTR(-ENOMEM); | |
66 | m->fsid = fsid; | |
67 | m->epoch = epoch; | |
68 | m->num_mon = num_mon; | |
69 | ceph_decode_copy(&p, m->mon_inst, num_mon*sizeof(m->mon_inst[0])); | |
63f2d211 SW |
70 | for (i = 0; i < num_mon; i++) |
71 | ceph_decode_addr(&m->mon_inst[i].addr); | |
ba75bb98 | 72 | |
ba75bb98 SW |
73 | dout("monmap_decode epoch %d, num_mon %d\n", m->epoch, |
74 | m->num_mon); | |
75 | for (i = 0; i < m->num_mon; i++) | |
76 | dout("monmap_decode mon%d is %s\n", i, | |
3d14c5d2 | 77 | ceph_pr_addr(&m->mon_inst[i].addr.in_addr)); |
ba75bb98 SW |
78 | return m; |
79 | ||
80 | bad: | |
81 | dout("monmap_decode failed with %d\n", err); | |
82 | kfree(m); | |
83 | return ERR_PTR(err); | |
84 | } | |
85 | ||
86 | /* | |
87 | * return true if *addr is included in the monmap. | |
88 | */ | |
89 | int ceph_monmap_contains(struct ceph_monmap *m, struct ceph_entity_addr *addr) | |
90 | { | |
91 | int i; | |
92 | ||
93 | for (i = 0; i < m->num_mon; i++) | |
103e2d3a | 94 | if (memcmp(addr, &m->mon_inst[i].addr, sizeof(*addr)) == 0) |
ba75bb98 SW |
95 | return 1; |
96 | return 0; | |
97 | } | |
98 | ||
5ce6e9db SW |
99 | /* |
100 | * Send an auth request. | |
101 | */ | |
102 | static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len) | |
103 | { | |
104 | monc->pending_auth = 1; | |
105 | monc->m_auth->front.iov_len = len; | |
106 | monc->m_auth->hdr.front_len = cpu_to_le32(len); | |
6740a845 | 107 | ceph_msg_revoke(monc->m_auth); |
5ce6e9db | 108 | ceph_msg_get(monc->m_auth); /* keep our ref */ |
67130934 | 109 | ceph_con_send(&monc->con, monc->m_auth); |
5ce6e9db SW |
110 | } |
111 | ||
ba75bb98 SW |
112 | /* |
113 | * Close monitor session, if any. | |
114 | */ | |
115 | static void __close_session(struct ceph_mon_client *monc) | |
116 | { | |
f6a2f5be | 117 | dout("__close_session closing mon%d\n", monc->cur_mon); |
6740a845 | 118 | ceph_msg_revoke(monc->m_auth); |
4f471e4a SW |
119 | ceph_msg_revoke_incoming(monc->m_auth_reply); |
120 | ceph_msg_revoke(monc->m_subscribe); | |
121 | ceph_msg_revoke_incoming(monc->m_subscribe_ack); | |
67130934 | 122 | ceph_con_close(&monc->con); |
0e04dc26 | 123 | |
f6a2f5be SW |
124 | monc->pending_auth = 0; |
125 | ceph_auth_reset(monc->auth); | |
ba75bb98 SW |
126 | } |
127 | ||
128 | /* | |
0e04dc26 ID |
129 | * Pick a new monitor at random and set cur_mon. If we are repicking |
130 | * (i.e. cur_mon is already set), be sure to pick a different one. | |
ba75bb98 | 131 | */ |
0e04dc26 | 132 | static void pick_new_mon(struct ceph_mon_client *monc) |
ba75bb98 | 133 | { |
0e04dc26 | 134 | int old_mon = monc->cur_mon; |
ba75bb98 | 135 | |
0e04dc26 | 136 | BUG_ON(monc->monmap->num_mon < 1); |
ba75bb98 | 137 | |
0e04dc26 ID |
138 | if (monc->monmap->num_mon == 1) { |
139 | monc->cur_mon = 0; | |
140 | } else { | |
141 | int max = monc->monmap->num_mon; | |
142 | int o = -1; | |
143 | int n; | |
144 | ||
145 | if (monc->cur_mon >= 0) { | |
146 | if (monc->cur_mon < monc->monmap->num_mon) | |
147 | o = monc->cur_mon; | |
148 | if (o >= 0) | |
149 | max--; | |
150 | } | |
4e7a5dcd | 151 | |
0e04dc26 ID |
152 | n = prandom_u32() % max; |
153 | if (o >= 0 && n >= o) | |
154 | n++; | |
8b9558aa | 155 | |
0e04dc26 | 156 | monc->cur_mon = n; |
ba75bb98 | 157 | } |
0e04dc26 ID |
158 | |
159 | dout("%s mon%d -> mon%d out of %d mons\n", __func__, old_mon, | |
160 | monc->cur_mon, monc->monmap->num_mon); | |
161 | } | |
162 | ||
163 | /* | |
164 | * Open a session with a new monitor. | |
165 | */ | |
166 | static void __open_session(struct ceph_mon_client *monc) | |
167 | { | |
168 | int ret; | |
169 | ||
170 | pick_new_mon(monc); | |
171 | ||
1752b50c | 172 | monc->hunting = true; |
168b9090 ID |
173 | if (monc->had_a_connection) { |
174 | monc->hunt_mult *= CEPH_MONC_HUNT_BACKOFF; | |
175 | if (monc->hunt_mult > CEPH_MONC_HUNT_MAX_MULT) | |
176 | monc->hunt_mult = CEPH_MONC_HUNT_MAX_MULT; | |
177 | } | |
178 | ||
0e04dc26 ID |
179 | monc->sub_renew_after = jiffies; /* i.e., expired */ |
180 | monc->sub_renew_sent = 0; | |
181 | ||
182 | dout("%s opening mon%d\n", __func__, monc->cur_mon); | |
183 | ceph_con_open(&monc->con, CEPH_ENTITY_TYPE_MON, monc->cur_mon, | |
184 | &monc->monmap->mon_inst[monc->cur_mon].addr); | |
185 | ||
186 | /* | |
187 | * send an initial keepalive to ensure our timestamp is valid | |
188 | * by the time we are in an OPENED state | |
189 | */ | |
190 | ceph_con_keepalive(&monc->con); | |
191 | ||
192 | /* initiate authentication handshake */ | |
193 | ret = ceph_auth_build_hello(monc->auth, | |
194 | monc->m_auth->front.iov_base, | |
195 | monc->m_auth->front_alloc_len); | |
196 | BUG_ON(ret <= 0); | |
197 | __send_prepared_auth_request(monc, ret); | |
ba75bb98 SW |
198 | } |
199 | ||
1752b50c ID |
200 | static void reopen_session(struct ceph_mon_client *monc) |
201 | { | |
202 | if (!monc->hunting) | |
203 | pr_info("mon%d %s session lost, hunting for new mon\n", | |
204 | monc->cur_mon, ceph_pr_addr(&monc->con.peer_addr.in_addr)); | |
205 | ||
206 | __close_session(monc); | |
207 | __open_session(monc); | |
208 | } | |
209 | ||
ba75bb98 SW |
210 | /* |
211 | * Reschedule delayed work timer. | |
212 | */ | |
213 | static void __schedule_delayed(struct ceph_mon_client *monc) | |
214 | { | |
8b9558aa | 215 | unsigned long delay; |
ba75bb98 | 216 | |
168b9090 ID |
217 | if (monc->hunting) |
218 | delay = CEPH_MONC_HUNT_INTERVAL * monc->hunt_mult; | |
219 | else | |
58d81b12 | 220 | delay = CEPH_MONC_PING_INTERVAL; |
168b9090 | 221 | |
8b9558aa | 222 | dout("__schedule_delayed after %lu\n", delay); |
bee3a37c ID |
223 | mod_delayed_work(system_wq, &monc->delayed_work, |
224 | round_jiffies_relative(delay)); | |
ba75bb98 SW |
225 | } |
226 | ||
82dcabad | 227 | const char *ceph_sub_str[] = { |
82dcabad ID |
228 | [CEPH_SUB_MONMAP] = "monmap", |
229 | [CEPH_SUB_OSDMAP] = "osdmap", | |
0cabbd94 YZ |
230 | [CEPH_SUB_FSMAP] = "fsmap.user", |
231 | [CEPH_SUB_MDSMAP] = "mdsmap", | |
82dcabad ID |
232 | }; |
233 | ||
ba75bb98 | 234 | /* |
82dcabad ID |
235 | * Send subscribe request for one or more maps, according to |
236 | * monc->subs. | |
ba75bb98 SW |
237 | */ |
238 | static void __send_subscribe(struct ceph_mon_client *monc) | |
239 | { | |
82dcabad ID |
240 | struct ceph_msg *msg = monc->m_subscribe; |
241 | void *p = msg->front.iov_base; | |
242 | void *const end = p + msg->front_alloc_len; | |
243 | int num = 0; | |
244 | int i; | |
245 | ||
246 | dout("%s sent %lu\n", __func__, monc->sub_renew_sent); | |
247 | ||
248 | BUG_ON(monc->cur_mon < 0); | |
249 | ||
250 | if (!monc->sub_renew_sent) | |
251 | monc->sub_renew_sent = jiffies | 1; /* never 0 */ | |
252 | ||
253 | msg->hdr.version = cpu_to_le16(2); | |
254 | ||
255 | for (i = 0; i < ARRAY_SIZE(monc->subs); i++) { | |
256 | if (monc->subs[i].want) | |
257 | num++; | |
258 | } | |
259 | BUG_ON(num < 1); /* monmap sub is always there */ | |
260 | ceph_encode_32(&p, num); | |
261 | for (i = 0; i < ARRAY_SIZE(monc->subs); i++) { | |
737cc81e ID |
262 | char buf[32]; |
263 | int len; | |
82dcabad ID |
264 | |
265 | if (!monc->subs[i].want) | |
266 | continue; | |
267 | ||
737cc81e ID |
268 | len = sprintf(buf, "%s", ceph_sub_str[i]); |
269 | if (i == CEPH_SUB_MDSMAP && | |
270 | monc->fs_cluster_id != CEPH_FS_CLUSTER_ID_NONE) | |
271 | len += sprintf(buf + len, ".%d", monc->fs_cluster_id); | |
272 | ||
273 | dout("%s %s start %llu flags 0x%x\n", __func__, buf, | |
82dcabad ID |
274 | le64_to_cpu(monc->subs[i].item.start), |
275 | monc->subs[i].item.flags); | |
737cc81e | 276 | ceph_encode_string(&p, end, buf, len); |
82dcabad ID |
277 | memcpy(p, &monc->subs[i].item, sizeof(monc->subs[i].item)); |
278 | p += sizeof(monc->subs[i].item); | |
ba75bb98 | 279 | } |
82dcabad | 280 | |
737cc81e | 281 | BUG_ON(p > end); |
82dcabad ID |
282 | msg->front.iov_len = p - msg->front.iov_base; |
283 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
284 | ceph_msg_revoke(msg); | |
285 | ceph_con_send(&monc->con, ceph_msg_get(msg)); | |
ba75bb98 SW |
286 | } |
287 | ||
288 | static void handle_subscribe_ack(struct ceph_mon_client *monc, | |
289 | struct ceph_msg *msg) | |
290 | { | |
95c96174 | 291 | unsigned int seconds; |
07bd10fb SW |
292 | struct ceph_mon_subscribe_ack *h = msg->front.iov_base; |
293 | ||
294 | if (msg->front.iov_len < sizeof(*h)) | |
295 | goto bad; | |
296 | seconds = le32_to_cpu(h->duration); | |
ba75bb98 | 297 | |
ba75bb98 | 298 | mutex_lock(&monc->mutex); |
82dcabad ID |
299 | if (monc->sub_renew_sent) { |
300 | monc->sub_renew_after = monc->sub_renew_sent + | |
301 | (seconds >> 1) * HZ - 1; | |
302 | dout("%s sent %lu duration %d renew after %lu\n", __func__, | |
303 | monc->sub_renew_sent, seconds, monc->sub_renew_after); | |
304 | monc->sub_renew_sent = 0; | |
305 | } else { | |
306 | dout("%s sent %lu renew after %lu, ignoring\n", __func__, | |
307 | monc->sub_renew_sent, monc->sub_renew_after); | |
308 | } | |
ba75bb98 SW |
309 | mutex_unlock(&monc->mutex); |
310 | return; | |
311 | bad: | |
312 | pr_err("got corrupt subscribe-ack msg\n"); | |
9ec7cab1 | 313 | ceph_msg_dump(msg); |
ba75bb98 SW |
314 | } |
315 | ||
316 | /* | |
82dcabad ID |
317 | * Register interest in a map |
318 | * | |
319 | * @sub: one of CEPH_SUB_* | |
320 | * @epoch: X for "every map since X", or 0 for "just the latest" | |
ba75bb98 | 321 | */ |
82dcabad ID |
322 | static bool __ceph_monc_want_map(struct ceph_mon_client *monc, int sub, |
323 | u32 epoch, bool continuous) | |
ba75bb98 | 324 | { |
82dcabad ID |
325 | __le64 start = cpu_to_le64(epoch); |
326 | u8 flags = !continuous ? CEPH_SUBSCRIBE_ONETIME : 0; | |
327 | ||
328 | dout("%s %s epoch %u continuous %d\n", __func__, ceph_sub_str[sub], | |
329 | epoch, continuous); | |
330 | ||
331 | if (monc->subs[sub].want && | |
332 | monc->subs[sub].item.start == start && | |
333 | monc->subs[sub].item.flags == flags) | |
334 | return false; | |
335 | ||
336 | monc->subs[sub].item.start = start; | |
337 | monc->subs[sub].item.flags = flags; | |
338 | monc->subs[sub].want = true; | |
339 | ||
340 | return true; | |
341 | } | |
342 | ||
343 | bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch, | |
344 | bool continuous) | |
345 | { | |
346 | bool need_request; | |
347 | ||
ba75bb98 | 348 | mutex_lock(&monc->mutex); |
82dcabad | 349 | need_request = __ceph_monc_want_map(monc, sub, epoch, continuous); |
ba75bb98 | 350 | mutex_unlock(&monc->mutex); |
82dcabad ID |
351 | |
352 | return need_request; | |
353 | } | |
354 | EXPORT_SYMBOL(ceph_monc_want_map); | |
355 | ||
356 | /* | |
357 | * Keep track of which maps we have | |
358 | * | |
359 | * @sub: one of CEPH_SUB_* | |
360 | */ | |
361 | static void __ceph_monc_got_map(struct ceph_mon_client *monc, int sub, | |
362 | u32 epoch) | |
363 | { | |
364 | dout("%s %s epoch %u\n", __func__, ceph_sub_str[sub], epoch); | |
365 | ||
366 | if (monc->subs[sub].want) { | |
367 | if (monc->subs[sub].item.flags & CEPH_SUBSCRIBE_ONETIME) | |
368 | monc->subs[sub].want = false; | |
369 | else | |
370 | monc->subs[sub].item.start = cpu_to_le64(epoch + 1); | |
371 | } | |
372 | ||
373 | monc->subs[sub].have = epoch; | |
ba75bb98 SW |
374 | } |
375 | ||
82dcabad | 376 | void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch) |
ba75bb98 SW |
377 | { |
378 | mutex_lock(&monc->mutex); | |
82dcabad | 379 | __ceph_monc_got_map(monc, sub, epoch); |
ba75bb98 | 380 | mutex_unlock(&monc->mutex); |
ba75bb98 | 381 | } |
82dcabad | 382 | EXPORT_SYMBOL(ceph_monc_got_map); |
ba75bb98 | 383 | |
42c1b124 ID |
384 | void ceph_monc_renew_subs(struct ceph_mon_client *monc) |
385 | { | |
386 | mutex_lock(&monc->mutex); | |
387 | __send_subscribe(monc); | |
388 | mutex_unlock(&monc->mutex); | |
389 | } | |
390 | EXPORT_SYMBOL(ceph_monc_renew_subs); | |
391 | ||
a319bf56 ID |
392 | /* |
393 | * Wait for an osdmap with a given epoch. | |
394 | * | |
395 | * @epoch: epoch to wait for | |
396 | * @timeout: in jiffies, 0 means "wait forever" | |
397 | */ | |
6044cde6 ID |
398 | int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch, |
399 | unsigned long timeout) | |
400 | { | |
401 | unsigned long started = jiffies; | |
216639dd | 402 | long ret; |
6044cde6 ID |
403 | |
404 | mutex_lock(&monc->mutex); | |
82dcabad | 405 | while (monc->subs[CEPH_SUB_OSDMAP].have < epoch) { |
6044cde6 ID |
406 | mutex_unlock(&monc->mutex); |
407 | ||
a319bf56 | 408 | if (timeout && time_after_eq(jiffies, started + timeout)) |
6044cde6 ID |
409 | return -ETIMEDOUT; |
410 | ||
411 | ret = wait_event_interruptible_timeout(monc->client->auth_wq, | |
82dcabad ID |
412 | monc->subs[CEPH_SUB_OSDMAP].have >= epoch, |
413 | ceph_timeout_jiffies(timeout)); | |
6044cde6 ID |
414 | if (ret < 0) |
415 | return ret; | |
416 | ||
417 | mutex_lock(&monc->mutex); | |
418 | } | |
419 | ||
420 | mutex_unlock(&monc->mutex); | |
421 | return 0; | |
422 | } | |
423 | EXPORT_SYMBOL(ceph_monc_wait_osdmap); | |
ba75bb98 | 424 | |
4e7a5dcd | 425 | /* |
82dcabad ID |
426 | * Open a session with a random monitor. Request monmap and osdmap, |
427 | * which are waited upon in __ceph_open_session(). | |
4e7a5dcd SW |
428 | */ |
429 | int ceph_monc_open_session(struct ceph_mon_client *monc) | |
ba75bb98 | 430 | { |
ba75bb98 | 431 | mutex_lock(&monc->mutex); |
82dcabad ID |
432 | __ceph_monc_want_map(monc, CEPH_SUB_MONMAP, 0, true); |
433 | __ceph_monc_want_map(monc, CEPH_SUB_OSDMAP, 0, false); | |
4e7a5dcd | 434 | __open_session(monc); |
ba75bb98 SW |
435 | __schedule_delayed(monc); |
436 | mutex_unlock(&monc->mutex); | |
437 | return 0; | |
438 | } | |
3d14c5d2 | 439 | EXPORT_SYMBOL(ceph_monc_open_session); |
ba75bb98 | 440 | |
0743304d SW |
441 | static void ceph_monc_handle_map(struct ceph_mon_client *monc, |
442 | struct ceph_msg *msg) | |
4e7a5dcd SW |
443 | { |
444 | struct ceph_client *client = monc->client; | |
445 | struct ceph_monmap *monmap = NULL, *old = monc->monmap; | |
446 | void *p, *end; | |
447 | ||
448 | mutex_lock(&monc->mutex); | |
449 | ||
450 | dout("handle_monmap\n"); | |
451 | p = msg->front.iov_base; | |
452 | end = p + msg->front.iov_len; | |
453 | ||
454 | monmap = ceph_monmap_decode(p, end); | |
455 | if (IS_ERR(monmap)) { | |
456 | pr_err("problem decoding monmap, %d\n", | |
457 | (int)PTR_ERR(monmap)); | |
d4a780ce | 458 | goto out; |
4e7a5dcd | 459 | } |
0743304d SW |
460 | |
461 | if (ceph_check_fsid(monc->client, &monmap->fsid) < 0) { | |
4e7a5dcd | 462 | kfree(monmap); |
d4a780ce | 463 | goto out; |
4e7a5dcd SW |
464 | } |
465 | ||
466 | client->monc.monmap = monmap; | |
4e7a5dcd SW |
467 | kfree(old); |
468 | ||
82dcabad | 469 | __ceph_monc_got_map(monc, CEPH_SUB_MONMAP, monc->monmap->epoch); |
02ac956c | 470 | client->have_fsid = true; |
d1c338a5 | 471 | |
d4a780ce | 472 | out: |
4e7a5dcd | 473 | mutex_unlock(&monc->mutex); |
03066f23 | 474 | wake_up_all(&client->auth_wq); |
4e7a5dcd SW |
475 | } |
476 | ||
ba75bb98 | 477 | /* |
7a6fdeb2 | 478 | * generic requests (currently statfs, mon_get_version) |
ba75bb98 | 479 | */ |
fcd00b68 | 480 | DEFINE_RB_FUNCS(generic_request, struct ceph_mon_generic_request, tid, node) |
85ff03f6 | 481 | |
f8c76f6f | 482 | static void release_generic_request(struct kref *kref) |
3143edd3 | 483 | { |
f8c76f6f YS |
484 | struct ceph_mon_generic_request *req = |
485 | container_of(kref, struct ceph_mon_generic_request, kref); | |
3143edd3 | 486 | |
d0b19705 ID |
487 | dout("%s greq %p request %p reply %p\n", __func__, req, req->request, |
488 | req->reply); | |
489 | WARN_ON(!RB_EMPTY_NODE(&req->node)); | |
490 | ||
3143edd3 SW |
491 | if (req->reply) |
492 | ceph_msg_put(req->reply); | |
493 | if (req->request) | |
494 | ceph_msg_put(req->request); | |
20547567 YS |
495 | |
496 | kfree(req); | |
3143edd3 SW |
497 | } |
498 | ||
f8c76f6f | 499 | static void put_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 | 500 | { |
d0b19705 ID |
501 | if (req) |
502 | kref_put(&req->kref, release_generic_request); | |
3143edd3 SW |
503 | } |
504 | ||
f8c76f6f | 505 | static void get_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 SW |
506 | { |
507 | kref_get(&req->kref); | |
508 | } | |
509 | ||
d0b19705 ID |
510 | static struct ceph_mon_generic_request * |
511 | alloc_generic_request(struct ceph_mon_client *monc, gfp_t gfp) | |
512 | { | |
513 | struct ceph_mon_generic_request *req; | |
514 | ||
515 | req = kzalloc(sizeof(*req), gfp); | |
516 | if (!req) | |
517 | return NULL; | |
518 | ||
519 | req->monc = monc; | |
520 | kref_init(&req->kref); | |
521 | RB_CLEAR_NODE(&req->node); | |
522 | init_completion(&req->completion); | |
523 | ||
524 | dout("%s greq %p\n", __func__, req); | |
525 | return req; | |
526 | } | |
527 | ||
528 | static void register_generic_request(struct ceph_mon_generic_request *req) | |
529 | { | |
530 | struct ceph_mon_client *monc = req->monc; | |
531 | ||
532 | WARN_ON(req->tid); | |
533 | ||
534 | get_generic_request(req); | |
535 | req->tid = ++monc->last_tid; | |
536 | insert_generic_request(&monc->generic_request_tree, req); | |
537 | } | |
538 | ||
539 | static void send_generic_request(struct ceph_mon_client *monc, | |
540 | struct ceph_mon_generic_request *req) | |
541 | { | |
542 | WARN_ON(!req->tid); | |
543 | ||
544 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
545 | req->request->hdr.tid = cpu_to_le64(req->tid); | |
546 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); | |
547 | } | |
548 | ||
549 | static void __finish_generic_request(struct ceph_mon_generic_request *req) | |
550 | { | |
551 | struct ceph_mon_client *monc = req->monc; | |
552 | ||
553 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
554 | erase_generic_request(&monc->generic_request_tree, req); | |
555 | ||
556 | ceph_msg_revoke(req->request); | |
557 | ceph_msg_revoke_incoming(req->reply); | |
558 | } | |
559 | ||
560 | static void finish_generic_request(struct ceph_mon_generic_request *req) | |
561 | { | |
562 | __finish_generic_request(req); | |
563 | put_generic_request(req); | |
564 | } | |
565 | ||
566 | static void complete_generic_request(struct ceph_mon_generic_request *req) | |
567 | { | |
568 | if (req->complete_cb) | |
569 | req->complete_cb(req); | |
570 | else | |
571 | complete_all(&req->completion); | |
572 | put_generic_request(req); | |
573 | } | |
574 | ||
f52ec33c | 575 | static void cancel_generic_request(struct ceph_mon_generic_request *req) |
d0b19705 ID |
576 | { |
577 | struct ceph_mon_client *monc = req->monc; | |
578 | struct ceph_mon_generic_request *lookup_req; | |
579 | ||
580 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
581 | ||
582 | mutex_lock(&monc->mutex); | |
583 | lookup_req = lookup_generic_request(&monc->generic_request_tree, | |
584 | req->tid); | |
585 | if (lookup_req) { | |
586 | WARN_ON(lookup_req != req); | |
587 | finish_generic_request(req); | |
588 | } | |
589 | ||
590 | mutex_unlock(&monc->mutex); | |
591 | } | |
592 | ||
593 | static int wait_generic_request(struct ceph_mon_generic_request *req) | |
594 | { | |
595 | int ret; | |
596 | ||
597 | dout("%s greq %p tid %llu\n", __func__, req, req->tid); | |
598 | ret = wait_for_completion_interruptible(&req->completion); | |
599 | if (ret) | |
600 | cancel_generic_request(req); | |
601 | else | |
602 | ret = req->result; /* completed */ | |
603 | ||
604 | return ret; | |
605 | } | |
606 | ||
f8c76f6f | 607 | static struct ceph_msg *get_generic_reply(struct ceph_connection *con, |
3143edd3 SW |
608 | struct ceph_msg_header *hdr, |
609 | int *skip) | |
610 | { | |
611 | struct ceph_mon_client *monc = con->private; | |
f8c76f6f | 612 | struct ceph_mon_generic_request *req; |
3143edd3 SW |
613 | u64 tid = le64_to_cpu(hdr->tid); |
614 | struct ceph_msg *m; | |
615 | ||
616 | mutex_lock(&monc->mutex); | |
fcd00b68 | 617 | req = lookup_generic_request(&monc->generic_request_tree, tid); |
3143edd3 | 618 | if (!req) { |
f8c76f6f | 619 | dout("get_generic_reply %lld dne\n", tid); |
3143edd3 SW |
620 | *skip = 1; |
621 | m = NULL; | |
622 | } else { | |
f8c76f6f | 623 | dout("get_generic_reply %lld got %p\n", tid, req->reply); |
1c20f2d2 | 624 | *skip = 0; |
3143edd3 SW |
625 | m = ceph_msg_get(req->reply); |
626 | /* | |
627 | * we don't need to track the connection reading into | |
628 | * this reply because we only have one open connection | |
629 | * at a time, ever. | |
630 | */ | |
631 | } | |
632 | mutex_unlock(&monc->mutex); | |
633 | return m; | |
634 | } | |
635 | ||
e56fa10e YS |
636 | /* |
637 | * statfs | |
638 | */ | |
ba75bb98 SW |
639 | static void handle_statfs_reply(struct ceph_mon_client *monc, |
640 | struct ceph_msg *msg) | |
641 | { | |
f8c76f6f | 642 | struct ceph_mon_generic_request *req; |
ba75bb98 | 643 | struct ceph_mon_statfs_reply *reply = msg->front.iov_base; |
3143edd3 | 644 | u64 tid = le64_to_cpu(msg->hdr.tid); |
ba75bb98 | 645 | |
d0b19705 ID |
646 | dout("%s msg %p tid %llu\n", __func__, msg, tid); |
647 | ||
ba75bb98 SW |
648 | if (msg->front.iov_len != sizeof(*reply)) |
649 | goto bad; | |
ba75bb98 SW |
650 | |
651 | mutex_lock(&monc->mutex); | |
fcd00b68 | 652 | req = lookup_generic_request(&monc->generic_request_tree, tid); |
d0b19705 ID |
653 | if (!req) { |
654 | mutex_unlock(&monc->mutex); | |
655 | return; | |
ba75bb98 | 656 | } |
d0b19705 ID |
657 | |
658 | req->result = 0; | |
659 | *req->u.st = reply->st; /* struct */ | |
660 | __finish_generic_request(req); | |
ba75bb98 | 661 | mutex_unlock(&monc->mutex); |
d0b19705 ID |
662 | |
663 | complete_generic_request(req); | |
ba75bb98 SW |
664 | return; |
665 | ||
666 | bad: | |
7a6fdeb2 | 667 | pr_err("corrupt statfs reply, tid %llu\n", tid); |
9ec7cab1 | 668 | ceph_msg_dump(msg); |
ba75bb98 SW |
669 | } |
670 | ||
671 | /* | |
3143edd3 | 672 | * Do a synchronous statfs(). |
ba75bb98 | 673 | */ |
3143edd3 | 674 | int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf) |
ba75bb98 | 675 | { |
f8c76f6f | 676 | struct ceph_mon_generic_request *req; |
ba75bb98 | 677 | struct ceph_mon_statfs *h; |
d0b19705 | 678 | int ret = -ENOMEM; |
3143edd3 | 679 | |
d0b19705 | 680 | req = alloc_generic_request(monc, GFP_NOFS); |
3143edd3 | 681 | if (!req) |
d0b19705 | 682 | goto out; |
ba75bb98 | 683 | |
b61c2763 SW |
684 | req->request = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), GFP_NOFS, |
685 | true); | |
a79832f2 | 686 | if (!req->request) |
3143edd3 | 687 | goto out; |
d0b19705 ID |
688 | |
689 | req->reply = ceph_msg_new(CEPH_MSG_STATFS_REPLY, 64, GFP_NOFS, true); | |
a79832f2 | 690 | if (!req->reply) |
3143edd3 | 691 | goto out; |
3143edd3 | 692 | |
d0b19705 ID |
693 | req->u.st = buf; |
694 | ||
695 | mutex_lock(&monc->mutex); | |
696 | register_generic_request(req); | |
3143edd3 SW |
697 | /* fill out request */ |
698 | h = req->request->front.iov_base; | |
13e38c8a SW |
699 | h->monhdr.have_version = 0; |
700 | h->monhdr.session_mon = cpu_to_le16(-1); | |
701 | h->monhdr.session_mon_tid = 0; | |
ba75bb98 | 702 | h->fsid = monc->monmap->fsid; |
d0b19705 ID |
703 | send_generic_request(monc, req); |
704 | mutex_unlock(&monc->mutex); | |
ba75bb98 | 705 | |
d0b19705 | 706 | ret = wait_generic_request(req); |
e56fa10e | 707 | out: |
f646912d | 708 | put_generic_request(req); |
d0b19705 | 709 | return ret; |
e56fa10e | 710 | } |
3d14c5d2 | 711 | EXPORT_SYMBOL(ceph_monc_do_statfs); |
e56fa10e | 712 | |
513a8243 ID |
713 | static void handle_get_version_reply(struct ceph_mon_client *monc, |
714 | struct ceph_msg *msg) | |
715 | { | |
716 | struct ceph_mon_generic_request *req; | |
717 | u64 tid = le64_to_cpu(msg->hdr.tid); | |
718 | void *p = msg->front.iov_base; | |
719 | void *end = p + msg->front_alloc_len; | |
720 | u64 handle; | |
721 | ||
d0b19705 | 722 | dout("%s msg %p tid %llu\n", __func__, msg, tid); |
513a8243 ID |
723 | |
724 | ceph_decode_need(&p, end, 2*sizeof(u64), bad); | |
725 | handle = ceph_decode_64(&p); | |
726 | if (tid != 0 && tid != handle) | |
727 | goto bad; | |
728 | ||
729 | mutex_lock(&monc->mutex); | |
fcd00b68 | 730 | req = lookup_generic_request(&monc->generic_request_tree, handle); |
d0b19705 ID |
731 | if (!req) { |
732 | mutex_unlock(&monc->mutex); | |
733 | return; | |
513a8243 | 734 | } |
d0b19705 ID |
735 | |
736 | req->result = 0; | |
737 | req->u.newest = ceph_decode_64(&p); | |
738 | __finish_generic_request(req); | |
513a8243 | 739 | mutex_unlock(&monc->mutex); |
513a8243 | 740 | |
d0b19705 | 741 | complete_generic_request(req); |
513a8243 | 742 | return; |
d0b19705 | 743 | |
513a8243 | 744 | bad: |
7a6fdeb2 | 745 | pr_err("corrupt mon_get_version reply, tid %llu\n", tid); |
513a8243 ID |
746 | ceph_msg_dump(msg); |
747 | } | |
748 | ||
d0b19705 ID |
749 | static struct ceph_mon_generic_request * |
750 | __ceph_monc_get_version(struct ceph_mon_client *monc, const char *what, | |
751 | ceph_monc_callback_t cb, u64 private_data) | |
513a8243 ID |
752 | { |
753 | struct ceph_mon_generic_request *req; | |
513a8243 | 754 | |
d0b19705 | 755 | req = alloc_generic_request(monc, GFP_NOIO); |
513a8243 | 756 | if (!req) |
d0b19705 | 757 | goto err_put_req; |
513a8243 ID |
758 | |
759 | req->request = ceph_msg_new(CEPH_MSG_MON_GET_VERSION, | |
760 | sizeof(u64) + sizeof(u32) + strlen(what), | |
d0b19705 ID |
761 | GFP_NOIO, true); |
762 | if (!req->request) | |
763 | goto err_put_req; | |
513a8243 | 764 | |
d0b19705 ID |
765 | req->reply = ceph_msg_new(CEPH_MSG_MON_GET_VERSION_REPLY, 32, GFP_NOIO, |
766 | true); | |
767 | if (!req->reply) | |
768 | goto err_put_req; | |
513a8243 | 769 | |
d0b19705 ID |
770 | req->complete_cb = cb; |
771 | req->private_data = private_data; | |
513a8243 | 772 | |
513a8243 | 773 | mutex_lock(&monc->mutex); |
d0b19705 ID |
774 | register_generic_request(req); |
775 | { | |
776 | void *p = req->request->front.iov_base; | |
777 | void *const end = p + req->request->front_alloc_len; | |
778 | ||
779 | ceph_encode_64(&p, req->tid); /* handle */ | |
780 | ceph_encode_string(&p, end, what, strlen(what)); | |
781 | WARN_ON(p != end); | |
782 | } | |
783 | send_generic_request(monc, req); | |
784 | mutex_unlock(&monc->mutex); | |
513a8243 | 785 | |
d0b19705 | 786 | return req; |
513a8243 | 787 | |
d0b19705 | 788 | err_put_req: |
f646912d | 789 | put_generic_request(req); |
d0b19705 | 790 | return ERR_PTR(-ENOMEM); |
513a8243 | 791 | } |
d0b19705 ID |
792 | |
793 | /* | |
794 | * Send MMonGetVersion and wait for the reply. | |
795 | * | |
796 | * @what: one of "mdsmap", "osdmap" or "monmap" | |
797 | */ | |
798 | int ceph_monc_get_version(struct ceph_mon_client *monc, const char *what, | |
799 | u64 *newest) | |
800 | { | |
801 | struct ceph_mon_generic_request *req; | |
802 | int ret; | |
803 | ||
804 | req = __ceph_monc_get_version(monc, what, NULL, 0); | |
805 | if (IS_ERR(req)) | |
806 | return PTR_ERR(req); | |
807 | ||
808 | ret = wait_generic_request(req); | |
809 | if (!ret) | |
810 | *newest = req->u.newest; | |
811 | ||
812 | put_generic_request(req); | |
813 | return ret; | |
814 | } | |
815 | EXPORT_SYMBOL(ceph_monc_get_version); | |
816 | ||
817 | /* | |
818 | * Send MMonGetVersion, | |
819 | * | |
820 | * @what: one of "mdsmap", "osdmap" or "monmap" | |
821 | */ | |
822 | int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what, | |
823 | ceph_monc_callback_t cb, u64 private_data) | |
824 | { | |
825 | struct ceph_mon_generic_request *req; | |
826 | ||
827 | req = __ceph_monc_get_version(monc, what, cb, private_data); | |
828 | if (IS_ERR(req)) | |
829 | return PTR_ERR(req); | |
830 | ||
831 | put_generic_request(req); | |
832 | return 0; | |
833 | } | |
834 | EXPORT_SYMBOL(ceph_monc_get_version_async); | |
513a8243 | 835 | |
6305a3b4 DF |
836 | static void handle_command_ack(struct ceph_mon_client *monc, |
837 | struct ceph_msg *msg) | |
838 | { | |
839 | struct ceph_mon_generic_request *req; | |
840 | void *p = msg->front.iov_base; | |
841 | void *const end = p + msg->front_alloc_len; | |
842 | u64 tid = le64_to_cpu(msg->hdr.tid); | |
843 | ||
844 | dout("%s msg %p tid %llu\n", __func__, msg, tid); | |
845 | ||
846 | ceph_decode_need(&p, end, sizeof(struct ceph_mon_request_header) + | |
847 | sizeof(u32), bad); | |
848 | p += sizeof(struct ceph_mon_request_header); | |
849 | ||
850 | mutex_lock(&monc->mutex); | |
851 | req = lookup_generic_request(&monc->generic_request_tree, tid); | |
852 | if (!req) { | |
853 | mutex_unlock(&monc->mutex); | |
854 | return; | |
855 | } | |
856 | ||
857 | req->result = ceph_decode_32(&p); | |
858 | __finish_generic_request(req); | |
859 | mutex_unlock(&monc->mutex); | |
860 | ||
861 | complete_generic_request(req); | |
862 | return; | |
863 | ||
864 | bad: | |
865 | pr_err("corrupt mon_command ack, tid %llu\n", tid); | |
866 | ceph_msg_dump(msg); | |
867 | } | |
868 | ||
869 | int ceph_monc_blacklist_add(struct ceph_mon_client *monc, | |
870 | struct ceph_entity_addr *client_addr) | |
871 | { | |
872 | struct ceph_mon_generic_request *req; | |
873 | struct ceph_mon_command *h; | |
874 | int ret = -ENOMEM; | |
875 | int len; | |
876 | ||
877 | req = alloc_generic_request(monc, GFP_NOIO); | |
878 | if (!req) | |
879 | goto out; | |
880 | ||
881 | req->request = ceph_msg_new(CEPH_MSG_MON_COMMAND, 256, GFP_NOIO, true); | |
882 | if (!req->request) | |
883 | goto out; | |
884 | ||
885 | req->reply = ceph_msg_new(CEPH_MSG_MON_COMMAND_ACK, 512, GFP_NOIO, | |
886 | true); | |
887 | if (!req->reply) | |
888 | goto out; | |
889 | ||
890 | mutex_lock(&monc->mutex); | |
891 | register_generic_request(req); | |
892 | h = req->request->front.iov_base; | |
893 | h->monhdr.have_version = 0; | |
894 | h->monhdr.session_mon = cpu_to_le16(-1); | |
895 | h->monhdr.session_mon_tid = 0; | |
896 | h->fsid = monc->monmap->fsid; | |
897 | h->num_strs = cpu_to_le32(1); | |
898 | len = sprintf(h->str, "{ \"prefix\": \"osd blacklist\", \ | |
899 | \"blacklistop\": \"add\", \ | |
900 | \"addr\": \"%pISpc/%u\" }", | |
901 | &client_addr->in_addr, le32_to_cpu(client_addr->nonce)); | |
902 | h->str_len = cpu_to_le32(len); | |
903 | send_generic_request(monc, req); | |
904 | mutex_unlock(&monc->mutex); | |
905 | ||
906 | ret = wait_generic_request(req); | |
907 | out: | |
908 | put_generic_request(req); | |
909 | return ret; | |
910 | } | |
911 | EXPORT_SYMBOL(ceph_monc_blacklist_add); | |
912 | ||
ba75bb98 | 913 | /* |
e56fa10e | 914 | * Resend pending generic requests. |
ba75bb98 | 915 | */ |
f8c76f6f | 916 | static void __resend_generic_request(struct ceph_mon_client *monc) |
ba75bb98 | 917 | { |
f8c76f6f | 918 | struct ceph_mon_generic_request *req; |
85ff03f6 | 919 | struct rb_node *p; |
ba75bb98 | 920 | |
f8c76f6f YS |
921 | for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) { |
922 | req = rb_entry(p, struct ceph_mon_generic_request, node); | |
6740a845 | 923 | ceph_msg_revoke(req->request); |
4f471e4a | 924 | ceph_msg_revoke_incoming(req->reply); |
67130934 | 925 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
ba75bb98 SW |
926 | } |
927 | } | |
928 | ||
929 | /* | |
930 | * Delayed work. If we haven't mounted yet, retry. Otherwise, | |
931 | * renew/retry subscription as needed (in case it is timing out, or we | |
932 | * got an ENOMEM). And keep the monitor connection alive. | |
933 | */ | |
934 | static void delayed_work(struct work_struct *work) | |
935 | { | |
936 | struct ceph_mon_client *monc = | |
937 | container_of(work, struct ceph_mon_client, delayed_work.work); | |
938 | ||
939 | dout("monc delayed_work\n"); | |
940 | mutex_lock(&monc->mutex); | |
4e7a5dcd | 941 | if (monc->hunting) { |
1752b50c ID |
942 | dout("%s continuing hunt\n", __func__); |
943 | reopen_session(monc); | |
ba75bb98 | 944 | } else { |
8b9558aa YZ |
945 | int is_auth = ceph_auth_is_authenticated(monc->auth); |
946 | if (ceph_con_keepalive_expired(&monc->con, | |
58d81b12 | 947 | CEPH_MONC_PING_TIMEOUT)) { |
8b9558aa YZ |
948 | dout("monc keepalive timeout\n"); |
949 | is_auth = 0; | |
1752b50c | 950 | reopen_session(monc); |
8b9558aa | 951 | } |
9bd2e6f8 | 952 | |
8b9558aa YZ |
953 | if (!monc->hunting) { |
954 | ceph_con_keepalive(&monc->con); | |
955 | __validate_auth(monc); | |
956 | } | |
9bd2e6f8 | 957 | |
82dcabad ID |
958 | if (is_auth) { |
959 | unsigned long now = jiffies; | |
960 | ||
961 | dout("%s renew subs? now %lu renew after %lu\n", | |
962 | __func__, now, monc->sub_renew_after); | |
963 | if (time_after_eq(now, monc->sub_renew_after)) | |
964 | __send_subscribe(monc); | |
965 | } | |
ba75bb98 | 966 | } |
ba75bb98 SW |
967 | __schedule_delayed(monc); |
968 | mutex_unlock(&monc->mutex); | |
969 | } | |
970 | ||
6b805185 SW |
971 | /* |
972 | * On startup, we build a temporary monmap populated with the IPs | |
973 | * provided by mount(2). | |
974 | */ | |
975 | static int build_initial_monmap(struct ceph_mon_client *monc) | |
976 | { | |
3d14c5d2 YS |
977 | struct ceph_options *opt = monc->client->options; |
978 | struct ceph_entity_addr *mon_addr = opt->mon_addr; | |
979 | int num_mon = opt->num_mon; | |
6b805185 SW |
980 | int i; |
981 | ||
982 | /* build initial monmap */ | |
983 | monc->monmap = kzalloc(sizeof(*monc->monmap) + | |
984 | num_mon*sizeof(monc->monmap->mon_inst[0]), | |
985 | GFP_KERNEL); | |
986 | if (!monc->monmap) | |
987 | return -ENOMEM; | |
988 | for (i = 0; i < num_mon; i++) { | |
989 | monc->monmap->mon_inst[i].addr = mon_addr[i]; | |
6b805185 SW |
990 | monc->monmap->mon_inst[i].addr.nonce = 0; |
991 | monc->monmap->mon_inst[i].name.type = | |
992 | CEPH_ENTITY_TYPE_MON; | |
993 | monc->monmap->mon_inst[i].name.num = cpu_to_le64(i); | |
994 | } | |
995 | monc->monmap->num_mon = num_mon; | |
6b805185 SW |
996 | return 0; |
997 | } | |
998 | ||
ba75bb98 SW |
999 | int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl) |
1000 | { | |
1001 | int err = 0; | |
1002 | ||
1003 | dout("init\n"); | |
1004 | memset(monc, 0, sizeof(*monc)); | |
1005 | monc->client = cl; | |
1006 | monc->monmap = NULL; | |
1007 | mutex_init(&monc->mutex); | |
1008 | ||
6b805185 SW |
1009 | err = build_initial_monmap(monc); |
1010 | if (err) | |
1011 | goto out; | |
1012 | ||
f6a2f5be | 1013 | /* connection */ |
4e7a5dcd | 1014 | /* authentication */ |
3d14c5d2 | 1015 | monc->auth = ceph_auth_init(cl->options->name, |
8323c3aa | 1016 | cl->options->key); |
49d9224c NW |
1017 | if (IS_ERR(monc->auth)) { |
1018 | err = PTR_ERR(monc->auth); | |
67130934 | 1019 | goto out_monmap; |
49d9224c | 1020 | } |
4e7a5dcd SW |
1021 | monc->auth->want_keys = |
1022 | CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON | | |
1023 | CEPH_ENTITY_TYPE_OSD | CEPH_ENTITY_TYPE_MDS; | |
1024 | ||
240ed68e | 1025 | /* msgs */ |
a79832f2 | 1026 | err = -ENOMEM; |
7c315c55 | 1027 | monc->m_subscribe_ack = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE_ACK, |
34d23762 | 1028 | sizeof(struct ceph_mon_subscribe_ack), |
5418d0a2 | 1029 | GFP_KERNEL, true); |
a79832f2 | 1030 | if (!monc->m_subscribe_ack) |
49d9224c | 1031 | goto out_auth; |
6694d6b9 | 1032 | |
5418d0a2 ID |
1033 | monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 128, |
1034 | GFP_KERNEL, true); | |
240ed68e SW |
1035 | if (!monc->m_subscribe) |
1036 | goto out_subscribe_ack; | |
1037 | ||
5418d0a2 ID |
1038 | monc->m_auth_reply = ceph_msg_new(CEPH_MSG_AUTH_REPLY, 4096, |
1039 | GFP_KERNEL, true); | |
a79832f2 | 1040 | if (!monc->m_auth_reply) |
240ed68e | 1041 | goto out_subscribe; |
4e7a5dcd | 1042 | |
5418d0a2 | 1043 | monc->m_auth = ceph_msg_new(CEPH_MSG_AUTH, 4096, GFP_KERNEL, true); |
9bd2e6f8 | 1044 | monc->pending_auth = 0; |
a79832f2 | 1045 | if (!monc->m_auth) |
6694d6b9 | 1046 | goto out_auth_reply; |
ba75bb98 | 1047 | |
735a72ef SW |
1048 | ceph_con_init(&monc->con, monc, &mon_con_ops, |
1049 | &monc->client->msgr); | |
1050 | ||
ba75bb98 | 1051 | monc->cur_mon = -1; |
168b9090 ID |
1052 | monc->had_a_connection = false; |
1053 | monc->hunt_mult = 1; | |
ba75bb98 SW |
1054 | |
1055 | INIT_DELAYED_WORK(&monc->delayed_work, delayed_work); | |
f8c76f6f | 1056 | monc->generic_request_tree = RB_ROOT; |
ba75bb98 SW |
1057 | monc->last_tid = 0; |
1058 | ||
737cc81e ID |
1059 | monc->fs_cluster_id = CEPH_FS_CLUSTER_ID_NONE; |
1060 | ||
4e7a5dcd SW |
1061 | return 0; |
1062 | ||
6694d6b9 SW |
1063 | out_auth_reply: |
1064 | ceph_msg_put(monc->m_auth_reply); | |
240ed68e SW |
1065 | out_subscribe: |
1066 | ceph_msg_put(monc->m_subscribe); | |
7c315c55 SW |
1067 | out_subscribe_ack: |
1068 | ceph_msg_put(monc->m_subscribe_ack); | |
49d9224c NW |
1069 | out_auth: |
1070 | ceph_auth_destroy(monc->auth); | |
4e7a5dcd SW |
1071 | out_monmap: |
1072 | kfree(monc->monmap); | |
ba75bb98 SW |
1073 | out: |
1074 | return err; | |
1075 | } | |
3d14c5d2 | 1076 | EXPORT_SYMBOL(ceph_monc_init); |
ba75bb98 SW |
1077 | |
1078 | void ceph_monc_stop(struct ceph_mon_client *monc) | |
1079 | { | |
1080 | dout("stop\n"); | |
1081 | cancel_delayed_work_sync(&monc->delayed_work); | |
1082 | ||
1083 | mutex_lock(&monc->mutex); | |
1084 | __close_session(monc); | |
0e04dc26 | 1085 | monc->cur_mon = -1; |
ba75bb98 SW |
1086 | mutex_unlock(&monc->mutex); |
1087 | ||
f3dea7ed SW |
1088 | /* |
1089 | * flush msgr queue before we destroy ourselves to ensure that: | |
1090 | * - any work that references our embedded con is finished. | |
1091 | * - any osd_client or other work that may reference an authorizer | |
1092 | * finishes before we shut down the auth subsystem. | |
1093 | */ | |
1094 | ceph_msgr_flush(); | |
1095 | ||
4e7a5dcd SW |
1096 | ceph_auth_destroy(monc->auth); |
1097 | ||
d0b19705 ID |
1098 | WARN_ON(!RB_EMPTY_ROOT(&monc->generic_request_tree)); |
1099 | ||
4e7a5dcd | 1100 | ceph_msg_put(monc->m_auth); |
6694d6b9 | 1101 | ceph_msg_put(monc->m_auth_reply); |
240ed68e | 1102 | ceph_msg_put(monc->m_subscribe); |
7c315c55 | 1103 | ceph_msg_put(monc->m_subscribe_ack); |
ba75bb98 SW |
1104 | |
1105 | kfree(monc->monmap); | |
1106 | } | |
3d14c5d2 | 1107 | EXPORT_SYMBOL(ceph_monc_stop); |
ba75bb98 | 1108 | |
0f9af169 ID |
1109 | static void finish_hunting(struct ceph_mon_client *monc) |
1110 | { | |
1111 | if (monc->hunting) { | |
1112 | dout("%s found mon%d\n", __func__, monc->cur_mon); | |
1113 | monc->hunting = false; | |
168b9090 ID |
1114 | monc->had_a_connection = true; |
1115 | monc->hunt_mult /= 2; /* reduce by 50% */ | |
1116 | if (monc->hunt_mult < 1) | |
1117 | monc->hunt_mult = 1; | |
0f9af169 ID |
1118 | } |
1119 | } | |
1120 | ||
4e7a5dcd SW |
1121 | static void handle_auth_reply(struct ceph_mon_client *monc, |
1122 | struct ceph_msg *msg) | |
1123 | { | |
1124 | int ret; | |
09c4d6a7 | 1125 | int was_auth = 0; |
4e7a5dcd SW |
1126 | |
1127 | mutex_lock(&monc->mutex); | |
27859f97 | 1128 | was_auth = ceph_auth_is_authenticated(monc->auth); |
9bd2e6f8 | 1129 | monc->pending_auth = 0; |
4e7a5dcd SW |
1130 | ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base, |
1131 | msg->front.iov_len, | |
1132 | monc->m_auth->front.iov_base, | |
3cea4c30 | 1133 | monc->m_auth->front_alloc_len); |
0f9af169 ID |
1134 | if (ret > 0) { |
1135 | __send_prepared_auth_request(monc, ret); | |
1136 | goto out; | |
1137 | } | |
1138 | ||
1139 | finish_hunting(monc); | |
1140 | ||
4e7a5dcd | 1141 | if (ret < 0) { |
9bd2e6f8 | 1142 | monc->client->auth_err = ret; |
27859f97 | 1143 | } else if (!was_auth && ceph_auth_is_authenticated(monc->auth)) { |
4e7a5dcd | 1144 | dout("authenticated, starting session\n"); |
0743304d | 1145 | |
15d9882c AE |
1146 | monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT; |
1147 | monc->client->msgr.inst.name.num = | |
0cf5537b | 1148 | cpu_to_le64(monc->auth->global_id); |
0743304d | 1149 | |
4e7a5dcd | 1150 | __send_subscribe(monc); |
f8c76f6f | 1151 | __resend_generic_request(monc); |
0f9af169 ID |
1152 | |
1153 | pr_info("mon%d %s session established\n", monc->cur_mon, | |
1154 | ceph_pr_addr(&monc->con.peer_addr.in_addr)); | |
4e7a5dcd | 1155 | } |
0f9af169 ID |
1156 | |
1157 | out: | |
4e7a5dcd | 1158 | mutex_unlock(&monc->mutex); |
0f9af169 ID |
1159 | if (monc->client->auth_err < 0) |
1160 | wake_up_all(&monc->client->auth_wq); | |
4e7a5dcd SW |
1161 | } |
1162 | ||
9bd2e6f8 SW |
1163 | static int __validate_auth(struct ceph_mon_client *monc) |
1164 | { | |
1165 | int ret; | |
1166 | ||
1167 | if (monc->pending_auth) | |
1168 | return 0; | |
1169 | ||
1170 | ret = ceph_build_auth(monc->auth, monc->m_auth->front.iov_base, | |
3cea4c30 | 1171 | monc->m_auth->front_alloc_len); |
9bd2e6f8 SW |
1172 | if (ret <= 0) |
1173 | return ret; /* either an error, or no need to authenticate */ | |
1174 | __send_prepared_auth_request(monc, ret); | |
1175 | return 0; | |
1176 | } | |
1177 | ||
1178 | int ceph_monc_validate_auth(struct ceph_mon_client *monc) | |
1179 | { | |
1180 | int ret; | |
1181 | ||
1182 | mutex_lock(&monc->mutex); | |
1183 | ret = __validate_auth(monc); | |
1184 | mutex_unlock(&monc->mutex); | |
1185 | return ret; | |
1186 | } | |
3d14c5d2 | 1187 | EXPORT_SYMBOL(ceph_monc_validate_auth); |
9bd2e6f8 | 1188 | |
ba75bb98 SW |
1189 | /* |
1190 | * handle incoming message | |
1191 | */ | |
1192 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1193 | { | |
1194 | struct ceph_mon_client *monc = con->private; | |
1195 | int type = le16_to_cpu(msg->hdr.type); | |
1196 | ||
1197 | if (!monc) | |
1198 | return; | |
1199 | ||
1200 | switch (type) { | |
4e7a5dcd SW |
1201 | case CEPH_MSG_AUTH_REPLY: |
1202 | handle_auth_reply(monc, msg); | |
ba75bb98 SW |
1203 | break; |
1204 | ||
1205 | case CEPH_MSG_MON_SUBSCRIBE_ACK: | |
1206 | handle_subscribe_ack(monc, msg); | |
1207 | break; | |
1208 | ||
1209 | case CEPH_MSG_STATFS_REPLY: | |
1210 | handle_statfs_reply(monc, msg); | |
1211 | break; | |
1212 | ||
513a8243 ID |
1213 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
1214 | handle_get_version_reply(monc, msg); | |
1215 | break; | |
1216 | ||
6305a3b4 DF |
1217 | case CEPH_MSG_MON_COMMAND_ACK: |
1218 | handle_command_ack(monc, msg); | |
1219 | break; | |
1220 | ||
4e7a5dcd SW |
1221 | case CEPH_MSG_MON_MAP: |
1222 | ceph_monc_handle_map(monc, msg); | |
1223 | break; | |
1224 | ||
ba75bb98 SW |
1225 | case CEPH_MSG_OSD_MAP: |
1226 | ceph_osdc_handle_map(&monc->client->osdc, msg); | |
1227 | break; | |
1228 | ||
1229 | default: | |
3d14c5d2 YS |
1230 | /* can the chained handler handle it? */ |
1231 | if (monc->client->extra_mon_dispatch && | |
1232 | monc->client->extra_mon_dispatch(monc->client, msg) == 0) | |
1233 | break; | |
1234 | ||
ba75bb98 SW |
1235 | pr_err("received unknown message type %d %s\n", type, |
1236 | ceph_msg_type_name(type)); | |
1237 | } | |
1238 | ceph_msg_put(msg); | |
1239 | } | |
1240 | ||
1241 | /* | |
1242 | * Allocate memory for incoming message | |
1243 | */ | |
1244 | static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, | |
2450418c YS |
1245 | struct ceph_msg_header *hdr, |
1246 | int *skip) | |
ba75bb98 SW |
1247 | { |
1248 | struct ceph_mon_client *monc = con->private; | |
1249 | int type = le16_to_cpu(hdr->type); | |
2450418c | 1250 | int front_len = le32_to_cpu(hdr->front_len); |
5b3a4db3 | 1251 | struct ceph_msg *m = NULL; |
ba75bb98 | 1252 | |
2450418c | 1253 | *skip = 0; |
0547a9b3 | 1254 | |
ba75bb98 | 1255 | switch (type) { |
ba75bb98 | 1256 | case CEPH_MSG_MON_SUBSCRIBE_ACK: |
7c315c55 | 1257 | m = ceph_msg_get(monc->m_subscribe_ack); |
2450418c | 1258 | break; |
ba75bb98 | 1259 | case CEPH_MSG_STATFS_REPLY: |
6305a3b4 | 1260 | case CEPH_MSG_MON_COMMAND_ACK: |
f8c76f6f | 1261 | return get_generic_reply(con, hdr, skip); |
4e7a5dcd | 1262 | case CEPH_MSG_AUTH_REPLY: |
6694d6b9 | 1263 | m = ceph_msg_get(monc->m_auth_reply); |
2450418c | 1264 | break; |
513a8243 ID |
1265 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
1266 | if (le64_to_cpu(hdr->tid) != 0) | |
1267 | return get_generic_reply(con, hdr, skip); | |
1268 | ||
1269 | /* | |
1270 | * Older OSDs don't set reply tid even if the orignal | |
1271 | * request had a non-zero tid. Workaround this weirdness | |
1272 | * by falling through to the allocate case. | |
1273 | */ | |
5b3a4db3 SW |
1274 | case CEPH_MSG_MON_MAP: |
1275 | case CEPH_MSG_MDS_MAP: | |
1276 | case CEPH_MSG_OSD_MAP: | |
0cabbd94 | 1277 | case CEPH_MSG_FS_MAP_USER: |
b61c2763 | 1278 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); |
1c20f2d2 AE |
1279 | if (!m) |
1280 | return NULL; /* ENOMEM--return skip == 0 */ | |
5b3a4db3 | 1281 | break; |
ba75bb98 | 1282 | } |
2450418c | 1283 | |
5b3a4db3 SW |
1284 | if (!m) { |
1285 | pr_info("alloc_msg unknown type %d\n", type); | |
2450418c | 1286 | *skip = 1; |
73c3d481 | 1287 | } else if (front_len > m->front_alloc_len) { |
b9a67899 JP |
1288 | pr_warn("mon_alloc_msg front %d > prealloc %d (%u#%llu)\n", |
1289 | front_len, m->front_alloc_len, | |
1290 | (unsigned int)con->peer_name.type, | |
1291 | le64_to_cpu(con->peer_name.num)); | |
73c3d481 SW |
1292 | ceph_msg_put(m); |
1293 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); | |
5b3a4db3 | 1294 | } |
73c3d481 | 1295 | |
2450418c | 1296 | return m; |
ba75bb98 SW |
1297 | } |
1298 | ||
1299 | /* | |
1300 | * If the monitor connection resets, pick a new monitor and resubmit | |
1301 | * any pending requests. | |
1302 | */ | |
1303 | static void mon_fault(struct ceph_connection *con) | |
1304 | { | |
1305 | struct ceph_mon_client *monc = con->private; | |
1306 | ||
ba75bb98 | 1307 | mutex_lock(&monc->mutex); |
b5d91704 ID |
1308 | dout("%s mon%d\n", __func__, monc->cur_mon); |
1309 | if (monc->cur_mon >= 0) { | |
1310 | if (!monc->hunting) { | |
1311 | dout("%s hunting for new mon\n", __func__); | |
1312 | reopen_session(monc); | |
1313 | __schedule_delayed(monc); | |
1314 | } else { | |
1315 | dout("%s already hunting\n", __func__); | |
1316 | } | |
ba75bb98 | 1317 | } |
ba75bb98 SW |
1318 | mutex_unlock(&monc->mutex); |
1319 | } | |
1320 | ||
ec87ef43 SW |
1321 | /* |
1322 | * We can ignore refcounting on the connection struct, as all references | |
1323 | * will come from the messenger workqueue, which is drained prior to | |
1324 | * mon_client destruction. | |
1325 | */ | |
1326 | static struct ceph_connection *con_get(struct ceph_connection *con) | |
1327 | { | |
1328 | return con; | |
1329 | } | |
1330 | ||
1331 | static void con_put(struct ceph_connection *con) | |
1332 | { | |
1333 | } | |
1334 | ||
9e32789f | 1335 | static const struct ceph_connection_operations mon_con_ops = { |
ec87ef43 SW |
1336 | .get = con_get, |
1337 | .put = con_put, | |
ba75bb98 SW |
1338 | .dispatch = dispatch, |
1339 | .fault = mon_fault, | |
1340 | .alloc_msg = mon_alloc_msg, | |
ba75bb98 | 1341 | }; |