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); |
f6a2f5be SW |
125 | monc->cur_mon = -1; |
126 | monc->pending_auth = 0; | |
127 | ceph_auth_reset(monc->auth); | |
ba75bb98 SW |
128 | } |
129 | ||
130 | /* | |
131 | * Open a session with a (new) monitor. | |
132 | */ | |
133 | static int __open_session(struct ceph_mon_client *monc) | |
134 | { | |
135 | char r; | |
4e7a5dcd | 136 | int ret; |
ba75bb98 SW |
137 | |
138 | if (monc->cur_mon < 0) { | |
139 | get_random_bytes(&r, 1); | |
140 | monc->cur_mon = r % monc->monmap->num_mon; | |
141 | dout("open_session num=%d r=%d -> mon%d\n", | |
142 | monc->monmap->num_mon, r, monc->cur_mon); | |
143 | monc->sub_sent = 0; | |
144 | monc->sub_renew_after = jiffies; /* i.e., expired */ | |
145 | monc->want_next_osdmap = !!monc->want_next_osdmap; | |
146 | ||
20581c1f | 147 | dout("open_session mon%d opening\n", monc->cur_mon); |
67130934 | 148 | ceph_con_open(&monc->con, |
b7a9e5dd | 149 | CEPH_ENTITY_TYPE_MON, monc->cur_mon, |
ba75bb98 | 150 | &monc->monmap->mon_inst[monc->cur_mon].addr); |
4e7a5dcd | 151 | |
8b9558aa YZ |
152 | /* send an initial keepalive to ensure our timestamp is |
153 | * valid by the time we are in an OPENED state */ | |
154 | ceph_con_keepalive(&monc->con); | |
155 | ||
4e7a5dcd SW |
156 | /* initiatiate authentication handshake */ |
157 | ret = ceph_auth_build_hello(monc->auth, | |
158 | monc->m_auth->front.iov_base, | |
3cea4c30 | 159 | monc->m_auth->front_alloc_len); |
5ce6e9db | 160 | __send_prepared_auth_request(monc, ret); |
ba75bb98 SW |
161 | } else { |
162 | dout("open_session mon%d already open\n", monc->cur_mon); | |
163 | } | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static bool __sub_expired(struct ceph_mon_client *monc) | |
168 | { | |
169 | return time_after_eq(jiffies, monc->sub_renew_after); | |
170 | } | |
171 | ||
172 | /* | |
173 | * Reschedule delayed work timer. | |
174 | */ | |
175 | static void __schedule_delayed(struct ceph_mon_client *monc) | |
176 | { | |
8b9558aa YZ |
177 | struct ceph_options *opt = monc->client->options; |
178 | unsigned long delay; | |
ba75bb98 | 179 | |
8b9558aa | 180 | if (monc->cur_mon < 0 || __sub_expired(monc)) { |
ba75bb98 | 181 | delay = 10 * HZ; |
8b9558aa | 182 | } else { |
ba75bb98 | 183 | delay = 20 * HZ; |
8b9558aa YZ |
184 | if (opt->monc_ping_timeout > 0) |
185 | delay = min(delay, opt->monc_ping_timeout / 3); | |
186 | } | |
187 | dout("__schedule_delayed after %lu\n", delay); | |
188 | schedule_delayed_work(&monc->delayed_work, | |
189 | round_jiffies_relative(delay)); | |
ba75bb98 SW |
190 | } |
191 | ||
192 | /* | |
193 | * Send subscribe request for mdsmap and/or osdmap. | |
194 | */ | |
195 | static void __send_subscribe(struct ceph_mon_client *monc) | |
196 | { | |
197 | dout("__send_subscribe sub_sent=%u exp=%u want_osd=%d\n", | |
95c96174 | 198 | (unsigned int)monc->sub_sent, __sub_expired(monc), |
ba75bb98 SW |
199 | monc->want_next_osdmap); |
200 | if ((__sub_expired(monc) && !monc->sub_sent) || | |
201 | monc->want_next_osdmap == 1) { | |
240ed68e | 202 | struct ceph_msg *msg = monc->m_subscribe; |
ba75bb98 SW |
203 | struct ceph_mon_subscribe_item *i; |
204 | void *p, *end; | |
3d14c5d2 | 205 | int num; |
ba75bb98 | 206 | |
ba75bb98 | 207 | p = msg->front.iov_base; |
3cea4c30 | 208 | end = p + msg->front_alloc_len; |
ba75bb98 | 209 | |
3d14c5d2 YS |
210 | num = 1 + !!monc->want_next_osdmap + !!monc->want_mdsmap; |
211 | ceph_encode_32(&p, num); | |
212 | ||
ba75bb98 SW |
213 | if (monc->want_next_osdmap) { |
214 | dout("__send_subscribe to 'osdmap' %u\n", | |
95c96174 | 215 | (unsigned int)monc->have_osdmap); |
ba75bb98 SW |
216 | ceph_encode_string(&p, end, "osdmap", 6); |
217 | i = p; | |
218 | i->have = cpu_to_le64(monc->have_osdmap); | |
219 | i->onetime = 1; | |
220 | p += sizeof(*i); | |
221 | monc->want_next_osdmap = 2; /* requested */ | |
ba75bb98 | 222 | } |
3d14c5d2 YS |
223 | if (monc->want_mdsmap) { |
224 | dout("__send_subscribe to 'mdsmap' %u+\n", | |
95c96174 | 225 | (unsigned int)monc->have_mdsmap); |
3d14c5d2 YS |
226 | ceph_encode_string(&p, end, "mdsmap", 6); |
227 | i = p; | |
228 | i->have = cpu_to_le64(monc->have_mdsmap); | |
229 | i->onetime = 0; | |
230 | p += sizeof(*i); | |
231 | } | |
4e7a5dcd SW |
232 | ceph_encode_string(&p, end, "monmap", 6); |
233 | i = p; | |
234 | i->have = 0; | |
235 | i->onetime = 0; | |
236 | p += sizeof(*i); | |
ba75bb98 SW |
237 | |
238 | msg->front.iov_len = p - msg->front.iov_base; | |
239 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
6740a845 | 240 | ceph_msg_revoke(msg); |
67130934 | 241 | ceph_con_send(&monc->con, ceph_msg_get(msg)); |
ba75bb98 SW |
242 | |
243 | monc->sub_sent = jiffies | 1; /* never 0 */ | |
244 | } | |
245 | } | |
246 | ||
247 | static void handle_subscribe_ack(struct ceph_mon_client *monc, | |
248 | struct ceph_msg *msg) | |
249 | { | |
95c96174 | 250 | unsigned int seconds; |
07bd10fb SW |
251 | struct ceph_mon_subscribe_ack *h = msg->front.iov_base; |
252 | ||
253 | if (msg->front.iov_len < sizeof(*h)) | |
254 | goto bad; | |
255 | seconds = le32_to_cpu(h->duration); | |
ba75bb98 | 256 | |
ba75bb98 SW |
257 | mutex_lock(&monc->mutex); |
258 | if (monc->hunting) { | |
259 | pr_info("mon%d %s session established\n", | |
3d14c5d2 | 260 | monc->cur_mon, |
67130934 | 261 | ceph_pr_addr(&monc->con.peer_addr.in_addr)); |
ba75bb98 SW |
262 | monc->hunting = false; |
263 | } | |
264 | dout("handle_subscribe_ack after %d seconds\n", seconds); | |
0656d11b | 265 | monc->sub_renew_after = monc->sub_sent + (seconds >> 1)*HZ - 1; |
ba75bb98 SW |
266 | monc->sub_sent = 0; |
267 | mutex_unlock(&monc->mutex); | |
268 | return; | |
269 | bad: | |
270 | pr_err("got corrupt subscribe-ack msg\n"); | |
9ec7cab1 | 271 | ceph_msg_dump(msg); |
ba75bb98 SW |
272 | } |
273 | ||
274 | /* | |
275 | * Keep track of which maps we have | |
276 | */ | |
277 | int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 got) | |
278 | { | |
279 | mutex_lock(&monc->mutex); | |
280 | monc->have_mdsmap = got; | |
281 | mutex_unlock(&monc->mutex); | |
282 | return 0; | |
283 | } | |
3d14c5d2 | 284 | EXPORT_SYMBOL(ceph_monc_got_mdsmap); |
ba75bb98 SW |
285 | |
286 | int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 got) | |
287 | { | |
288 | mutex_lock(&monc->mutex); | |
289 | monc->have_osdmap = got; | |
290 | monc->want_next_osdmap = 0; | |
291 | mutex_unlock(&monc->mutex); | |
292 | return 0; | |
293 | } | |
294 | ||
295 | /* | |
296 | * Register interest in the next osdmap | |
297 | */ | |
298 | void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc) | |
299 | { | |
300 | dout("request_next_osdmap have %u\n", monc->have_osdmap); | |
301 | mutex_lock(&monc->mutex); | |
302 | if (!monc->want_next_osdmap) | |
303 | monc->want_next_osdmap = 1; | |
304 | if (monc->want_next_osdmap < 2) | |
305 | __send_subscribe(monc); | |
306 | mutex_unlock(&monc->mutex); | |
307 | } | |
6044cde6 ID |
308 | EXPORT_SYMBOL(ceph_monc_request_next_osdmap); |
309 | ||
a319bf56 ID |
310 | /* |
311 | * Wait for an osdmap with a given epoch. | |
312 | * | |
313 | * @epoch: epoch to wait for | |
314 | * @timeout: in jiffies, 0 means "wait forever" | |
315 | */ | |
6044cde6 ID |
316 | int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch, |
317 | unsigned long timeout) | |
318 | { | |
319 | unsigned long started = jiffies; | |
216639dd | 320 | long ret; |
6044cde6 ID |
321 | |
322 | mutex_lock(&monc->mutex); | |
323 | while (monc->have_osdmap < epoch) { | |
324 | mutex_unlock(&monc->mutex); | |
325 | ||
a319bf56 | 326 | if (timeout && time_after_eq(jiffies, started + timeout)) |
6044cde6 ID |
327 | return -ETIMEDOUT; |
328 | ||
329 | ret = wait_event_interruptible_timeout(monc->client->auth_wq, | |
a319bf56 ID |
330 | monc->have_osdmap >= epoch, |
331 | ceph_timeout_jiffies(timeout)); | |
6044cde6 ID |
332 | if (ret < 0) |
333 | return ret; | |
334 | ||
335 | mutex_lock(&monc->mutex); | |
336 | } | |
337 | ||
338 | mutex_unlock(&monc->mutex); | |
339 | return 0; | |
340 | } | |
341 | EXPORT_SYMBOL(ceph_monc_wait_osdmap); | |
ba75bb98 | 342 | |
4e7a5dcd | 343 | /* |
50b885b9 | 344 | * |
4e7a5dcd SW |
345 | */ |
346 | int ceph_monc_open_session(struct ceph_mon_client *monc) | |
ba75bb98 | 347 | { |
ba75bb98 | 348 | mutex_lock(&monc->mutex); |
4e7a5dcd | 349 | __open_session(monc); |
ba75bb98 SW |
350 | __schedule_delayed(monc); |
351 | mutex_unlock(&monc->mutex); | |
352 | return 0; | |
353 | } | |
3d14c5d2 | 354 | EXPORT_SYMBOL(ceph_monc_open_session); |
ba75bb98 | 355 | |
d1c338a5 SW |
356 | /* |
357 | * We require the fsid and global_id in order to initialize our | |
358 | * debugfs dir. | |
359 | */ | |
360 | static bool have_debugfs_info(struct ceph_mon_client *monc) | |
361 | { | |
362 | dout("have_debugfs_info fsid %d globalid %lld\n", | |
363 | (int)monc->client->have_fsid, monc->auth->global_id); | |
364 | return monc->client->have_fsid && monc->auth->global_id > 0; | |
365 | } | |
366 | ||
0743304d SW |
367 | static void ceph_monc_handle_map(struct ceph_mon_client *monc, |
368 | struct ceph_msg *msg) | |
4e7a5dcd SW |
369 | { |
370 | struct ceph_client *client = monc->client; | |
371 | struct ceph_monmap *monmap = NULL, *old = monc->monmap; | |
372 | void *p, *end; | |
d1c338a5 | 373 | int had_debugfs_info, init_debugfs = 0; |
4e7a5dcd SW |
374 | |
375 | mutex_lock(&monc->mutex); | |
376 | ||
d1c338a5 SW |
377 | had_debugfs_info = have_debugfs_info(monc); |
378 | ||
4e7a5dcd SW |
379 | dout("handle_monmap\n"); |
380 | p = msg->front.iov_base; | |
381 | end = p + msg->front.iov_len; | |
382 | ||
383 | monmap = ceph_monmap_decode(p, end); | |
384 | if (IS_ERR(monmap)) { | |
385 | pr_err("problem decoding monmap, %d\n", | |
386 | (int)PTR_ERR(monmap)); | |
d4a780ce | 387 | goto out; |
4e7a5dcd | 388 | } |
0743304d SW |
389 | |
390 | if (ceph_check_fsid(monc->client, &monmap->fsid) < 0) { | |
4e7a5dcd | 391 | kfree(monmap); |
d4a780ce | 392 | goto out; |
4e7a5dcd SW |
393 | } |
394 | ||
395 | client->monc.monmap = monmap; | |
4e7a5dcd SW |
396 | kfree(old); |
397 | ||
ab434b60 SW |
398 | if (!client->have_fsid) { |
399 | client->have_fsid = true; | |
d1c338a5 SW |
400 | if (!had_debugfs_info && have_debugfs_info(monc)) { |
401 | pr_info("client%lld fsid %pU\n", | |
402 | ceph_client_id(monc->client), | |
403 | &monc->client->fsid); | |
404 | init_debugfs = 1; | |
405 | } | |
ab434b60 | 406 | mutex_unlock(&monc->mutex); |
d1c338a5 SW |
407 | |
408 | if (init_debugfs) { | |
409 | /* | |
410 | * do debugfs initialization without mutex to avoid | |
411 | * creating a locking dependency | |
412 | */ | |
413 | ceph_debugfs_client_init(monc->client); | |
414 | } | |
415 | ||
ab434b60 SW |
416 | goto out_unlocked; |
417 | } | |
d4a780ce | 418 | out: |
4e7a5dcd | 419 | mutex_unlock(&monc->mutex); |
ab434b60 | 420 | out_unlocked: |
03066f23 | 421 | wake_up_all(&client->auth_wq); |
4e7a5dcd SW |
422 | } |
423 | ||
ba75bb98 | 424 | /* |
7a6fdeb2 | 425 | * generic requests (currently statfs, mon_get_version) |
ba75bb98 | 426 | */ |
f8c76f6f | 427 | static struct ceph_mon_generic_request *__lookup_generic_req( |
85ff03f6 SW |
428 | struct ceph_mon_client *monc, u64 tid) |
429 | { | |
f8c76f6f YS |
430 | struct ceph_mon_generic_request *req; |
431 | struct rb_node *n = monc->generic_request_tree.rb_node; | |
85ff03f6 SW |
432 | |
433 | while (n) { | |
f8c76f6f | 434 | req = rb_entry(n, struct ceph_mon_generic_request, node); |
85ff03f6 SW |
435 | if (tid < req->tid) |
436 | n = n->rb_left; | |
437 | else if (tid > req->tid) | |
438 | n = n->rb_right; | |
439 | else | |
440 | return req; | |
441 | } | |
442 | return NULL; | |
443 | } | |
444 | ||
f8c76f6f YS |
445 | static void __insert_generic_request(struct ceph_mon_client *monc, |
446 | struct ceph_mon_generic_request *new) | |
85ff03f6 | 447 | { |
f8c76f6f | 448 | struct rb_node **p = &monc->generic_request_tree.rb_node; |
85ff03f6 | 449 | struct rb_node *parent = NULL; |
f8c76f6f | 450 | struct ceph_mon_generic_request *req = NULL; |
85ff03f6 SW |
451 | |
452 | while (*p) { | |
453 | parent = *p; | |
f8c76f6f | 454 | req = rb_entry(parent, struct ceph_mon_generic_request, node); |
85ff03f6 SW |
455 | if (new->tid < req->tid) |
456 | p = &(*p)->rb_left; | |
457 | else if (new->tid > req->tid) | |
458 | p = &(*p)->rb_right; | |
459 | else | |
460 | BUG(); | |
461 | } | |
462 | ||
463 | rb_link_node(&new->node, parent, p); | |
f8c76f6f | 464 | rb_insert_color(&new->node, &monc->generic_request_tree); |
85ff03f6 SW |
465 | } |
466 | ||
f8c76f6f | 467 | static void release_generic_request(struct kref *kref) |
3143edd3 | 468 | { |
f8c76f6f YS |
469 | struct ceph_mon_generic_request *req = |
470 | container_of(kref, struct ceph_mon_generic_request, kref); | |
3143edd3 SW |
471 | |
472 | if (req->reply) | |
473 | ceph_msg_put(req->reply); | |
474 | if (req->request) | |
475 | ceph_msg_put(req->request); | |
20547567 YS |
476 | |
477 | kfree(req); | |
3143edd3 SW |
478 | } |
479 | ||
f8c76f6f | 480 | static void put_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 | 481 | { |
f8c76f6f | 482 | kref_put(&req->kref, release_generic_request); |
3143edd3 SW |
483 | } |
484 | ||
f8c76f6f | 485 | static void get_generic_request(struct ceph_mon_generic_request *req) |
3143edd3 SW |
486 | { |
487 | kref_get(&req->kref); | |
488 | } | |
489 | ||
f8c76f6f | 490 | static struct ceph_msg *get_generic_reply(struct ceph_connection *con, |
3143edd3 SW |
491 | struct ceph_msg_header *hdr, |
492 | int *skip) | |
493 | { | |
494 | struct ceph_mon_client *monc = con->private; | |
f8c76f6f | 495 | struct ceph_mon_generic_request *req; |
3143edd3 SW |
496 | u64 tid = le64_to_cpu(hdr->tid); |
497 | struct ceph_msg *m; | |
498 | ||
499 | mutex_lock(&monc->mutex); | |
f8c76f6f | 500 | req = __lookup_generic_req(monc, tid); |
3143edd3 | 501 | if (!req) { |
f8c76f6f | 502 | dout("get_generic_reply %lld dne\n", tid); |
3143edd3 SW |
503 | *skip = 1; |
504 | m = NULL; | |
505 | } else { | |
f8c76f6f | 506 | dout("get_generic_reply %lld got %p\n", tid, req->reply); |
1c20f2d2 | 507 | *skip = 0; |
3143edd3 SW |
508 | m = ceph_msg_get(req->reply); |
509 | /* | |
510 | * we don't need to track the connection reading into | |
511 | * this reply because we only have one open connection | |
512 | * at a time, ever. | |
513 | */ | |
514 | } | |
515 | mutex_unlock(&monc->mutex); | |
516 | return m; | |
517 | } | |
518 | ||
513a8243 ID |
519 | static int __do_generic_request(struct ceph_mon_client *monc, u64 tid, |
520 | struct ceph_mon_generic_request *req) | |
e56fa10e YS |
521 | { |
522 | int err; | |
523 | ||
524 | /* register request */ | |
513a8243 | 525 | req->tid = tid != 0 ? tid : ++monc->last_tid; |
e56fa10e YS |
526 | req->request->hdr.tid = cpu_to_le64(req->tid); |
527 | __insert_generic_request(monc, req); | |
528 | monc->num_generic_requests++; | |
67130934 | 529 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
e56fa10e YS |
530 | mutex_unlock(&monc->mutex); |
531 | ||
532 | err = wait_for_completion_interruptible(&req->completion); | |
533 | ||
534 | mutex_lock(&monc->mutex); | |
535 | rb_erase(&req->node, &monc->generic_request_tree); | |
536 | monc->num_generic_requests--; | |
e56fa10e YS |
537 | |
538 | if (!err) | |
539 | err = req->result; | |
540 | return err; | |
541 | } | |
542 | ||
513a8243 ID |
543 | static int do_generic_request(struct ceph_mon_client *monc, |
544 | struct ceph_mon_generic_request *req) | |
545 | { | |
546 | int err; | |
547 | ||
548 | mutex_lock(&monc->mutex); | |
549 | err = __do_generic_request(monc, 0, req); | |
550 | mutex_unlock(&monc->mutex); | |
551 | ||
552 | return err; | |
553 | } | |
554 | ||
e56fa10e YS |
555 | /* |
556 | * statfs | |
557 | */ | |
ba75bb98 SW |
558 | static void handle_statfs_reply(struct ceph_mon_client *monc, |
559 | struct ceph_msg *msg) | |
560 | { | |
f8c76f6f | 561 | struct ceph_mon_generic_request *req; |
ba75bb98 | 562 | struct ceph_mon_statfs_reply *reply = msg->front.iov_base; |
3143edd3 | 563 | u64 tid = le64_to_cpu(msg->hdr.tid); |
ba75bb98 SW |
564 | |
565 | if (msg->front.iov_len != sizeof(*reply)) | |
566 | goto bad; | |
ba75bb98 SW |
567 | dout("handle_statfs_reply %p tid %llu\n", msg, tid); |
568 | ||
569 | mutex_lock(&monc->mutex); | |
f8c76f6f | 570 | req = __lookup_generic_req(monc, tid); |
ba75bb98 | 571 | if (req) { |
f8c76f6f | 572 | *(struct ceph_statfs *)req->buf = reply->st; |
ba75bb98 | 573 | req->result = 0; |
f8c76f6f | 574 | get_generic_request(req); |
ba75bb98 SW |
575 | } |
576 | mutex_unlock(&monc->mutex); | |
3143edd3 | 577 | if (req) { |
03066f23 | 578 | complete_all(&req->completion); |
f8c76f6f | 579 | put_generic_request(req); |
3143edd3 | 580 | } |
ba75bb98 SW |
581 | return; |
582 | ||
583 | bad: | |
7a6fdeb2 | 584 | pr_err("corrupt statfs reply, tid %llu\n", tid); |
9ec7cab1 | 585 | ceph_msg_dump(msg); |
ba75bb98 SW |
586 | } |
587 | ||
588 | /* | |
3143edd3 | 589 | * Do a synchronous statfs(). |
ba75bb98 | 590 | */ |
3143edd3 | 591 | int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf) |
ba75bb98 | 592 | { |
f8c76f6f | 593 | struct ceph_mon_generic_request *req; |
ba75bb98 | 594 | struct ceph_mon_statfs *h; |
3143edd3 SW |
595 | int err; |
596 | ||
cffe7b6d | 597 | req = kzalloc(sizeof(*req), GFP_NOFS); |
3143edd3 SW |
598 | if (!req) |
599 | return -ENOMEM; | |
600 | ||
3143edd3 SW |
601 | kref_init(&req->kref); |
602 | req->buf = buf; | |
603 | init_completion(&req->completion); | |
ba75bb98 | 604 | |
a79832f2 | 605 | err = -ENOMEM; |
b61c2763 SW |
606 | req->request = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), GFP_NOFS, |
607 | true); | |
a79832f2 | 608 | if (!req->request) |
3143edd3 | 609 | goto out; |
b61c2763 SW |
610 | req->reply = ceph_msg_new(CEPH_MSG_STATFS_REPLY, 1024, GFP_NOFS, |
611 | true); | |
a79832f2 | 612 | if (!req->reply) |
3143edd3 | 613 | goto out; |
3143edd3 SW |
614 | |
615 | /* fill out request */ | |
616 | h = req->request->front.iov_base; | |
13e38c8a SW |
617 | h->monhdr.have_version = 0; |
618 | h->monhdr.session_mon = cpu_to_le16(-1); | |
619 | h->monhdr.session_mon_tid = 0; | |
ba75bb98 | 620 | h->fsid = monc->monmap->fsid; |
ba75bb98 | 621 | |
e56fa10e | 622 | err = do_generic_request(monc, req); |
ba75bb98 | 623 | |
e56fa10e | 624 | out: |
f646912d | 625 | put_generic_request(req); |
e56fa10e YS |
626 | return err; |
627 | } | |
3d14c5d2 | 628 | EXPORT_SYMBOL(ceph_monc_do_statfs); |
e56fa10e | 629 | |
513a8243 ID |
630 | static void handle_get_version_reply(struct ceph_mon_client *monc, |
631 | struct ceph_msg *msg) | |
632 | { | |
633 | struct ceph_mon_generic_request *req; | |
634 | u64 tid = le64_to_cpu(msg->hdr.tid); | |
635 | void *p = msg->front.iov_base; | |
636 | void *end = p + msg->front_alloc_len; | |
637 | u64 handle; | |
638 | ||
639 | dout("%s %p tid %llu\n", __func__, msg, tid); | |
640 | ||
641 | ceph_decode_need(&p, end, 2*sizeof(u64), bad); | |
642 | handle = ceph_decode_64(&p); | |
643 | if (tid != 0 && tid != handle) | |
644 | goto bad; | |
645 | ||
646 | mutex_lock(&monc->mutex); | |
647 | req = __lookup_generic_req(monc, handle); | |
648 | if (req) { | |
649 | *(u64 *)req->buf = ceph_decode_64(&p); | |
650 | req->result = 0; | |
651 | get_generic_request(req); | |
652 | } | |
653 | mutex_unlock(&monc->mutex); | |
654 | if (req) { | |
655 | complete_all(&req->completion); | |
656 | put_generic_request(req); | |
657 | } | |
658 | ||
659 | return; | |
660 | bad: | |
7a6fdeb2 | 661 | pr_err("corrupt mon_get_version reply, tid %llu\n", tid); |
513a8243 ID |
662 | ceph_msg_dump(msg); |
663 | } | |
664 | ||
665 | /* | |
666 | * Send MMonGetVersion and wait for the reply. | |
667 | * | |
668 | * @what: one of "mdsmap", "osdmap" or "monmap" | |
669 | */ | |
670 | int ceph_monc_do_get_version(struct ceph_mon_client *monc, const char *what, | |
671 | u64 *newest) | |
672 | { | |
673 | struct ceph_mon_generic_request *req; | |
674 | void *p, *end; | |
675 | u64 tid; | |
676 | int err; | |
677 | ||
678 | req = kzalloc(sizeof(*req), GFP_NOFS); | |
679 | if (!req) | |
680 | return -ENOMEM; | |
681 | ||
682 | kref_init(&req->kref); | |
683 | req->buf = newest; | |
513a8243 ID |
684 | init_completion(&req->completion); |
685 | ||
686 | req->request = ceph_msg_new(CEPH_MSG_MON_GET_VERSION, | |
687 | sizeof(u64) + sizeof(u32) + strlen(what), | |
688 | GFP_NOFS, true); | |
689 | if (!req->request) { | |
690 | err = -ENOMEM; | |
691 | goto out; | |
692 | } | |
693 | ||
694 | req->reply = ceph_msg_new(CEPH_MSG_MON_GET_VERSION_REPLY, 1024, | |
695 | GFP_NOFS, true); | |
696 | if (!req->reply) { | |
697 | err = -ENOMEM; | |
698 | goto out; | |
699 | } | |
700 | ||
701 | p = req->request->front.iov_base; | |
702 | end = p + req->request->front_alloc_len; | |
703 | ||
704 | /* fill out request */ | |
705 | mutex_lock(&monc->mutex); | |
706 | tid = ++monc->last_tid; | |
707 | ceph_encode_64(&p, tid); /* handle */ | |
708 | ceph_encode_string(&p, end, what, strlen(what)); | |
709 | ||
710 | err = __do_generic_request(monc, tid, req); | |
711 | ||
712 | mutex_unlock(&monc->mutex); | |
713 | out: | |
f646912d | 714 | put_generic_request(req); |
513a8243 ID |
715 | return err; |
716 | } | |
717 | EXPORT_SYMBOL(ceph_monc_do_get_version); | |
718 | ||
ba75bb98 | 719 | /* |
e56fa10e | 720 | * Resend pending generic requests. |
ba75bb98 | 721 | */ |
f8c76f6f | 722 | static void __resend_generic_request(struct ceph_mon_client *monc) |
ba75bb98 | 723 | { |
f8c76f6f | 724 | struct ceph_mon_generic_request *req; |
85ff03f6 | 725 | struct rb_node *p; |
ba75bb98 | 726 | |
f8c76f6f YS |
727 | for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) { |
728 | req = rb_entry(p, struct ceph_mon_generic_request, node); | |
6740a845 | 729 | ceph_msg_revoke(req->request); |
4f471e4a | 730 | ceph_msg_revoke_incoming(req->reply); |
67130934 | 731 | ceph_con_send(&monc->con, ceph_msg_get(req->request)); |
ba75bb98 SW |
732 | } |
733 | } | |
734 | ||
735 | /* | |
736 | * Delayed work. If we haven't mounted yet, retry. Otherwise, | |
737 | * renew/retry subscription as needed (in case it is timing out, or we | |
738 | * got an ENOMEM). And keep the monitor connection alive. | |
739 | */ | |
740 | static void delayed_work(struct work_struct *work) | |
741 | { | |
742 | struct ceph_mon_client *monc = | |
743 | container_of(work, struct ceph_mon_client, delayed_work.work); | |
744 | ||
745 | dout("monc delayed_work\n"); | |
746 | mutex_lock(&monc->mutex); | |
4e7a5dcd SW |
747 | if (monc->hunting) { |
748 | __close_session(monc); | |
749 | __open_session(monc); /* continue hunting */ | |
ba75bb98 | 750 | } else { |
8b9558aa YZ |
751 | struct ceph_options *opt = monc->client->options; |
752 | int is_auth = ceph_auth_is_authenticated(monc->auth); | |
753 | if (ceph_con_keepalive_expired(&monc->con, | |
754 | opt->monc_ping_timeout)) { | |
755 | dout("monc keepalive timeout\n"); | |
756 | is_auth = 0; | |
757 | __close_session(monc); | |
758 | monc->hunting = true; | |
759 | __open_session(monc); | |
760 | } | |
9bd2e6f8 | 761 | |
8b9558aa YZ |
762 | if (!monc->hunting) { |
763 | ceph_con_keepalive(&monc->con); | |
764 | __validate_auth(monc); | |
765 | } | |
9bd2e6f8 | 766 | |
8b9558aa | 767 | if (is_auth) |
4e7a5dcd | 768 | __send_subscribe(monc); |
ba75bb98 | 769 | } |
ba75bb98 SW |
770 | __schedule_delayed(monc); |
771 | mutex_unlock(&monc->mutex); | |
772 | } | |
773 | ||
6b805185 SW |
774 | /* |
775 | * On startup, we build a temporary monmap populated with the IPs | |
776 | * provided by mount(2). | |
777 | */ | |
778 | static int build_initial_monmap(struct ceph_mon_client *monc) | |
779 | { | |
3d14c5d2 YS |
780 | struct ceph_options *opt = monc->client->options; |
781 | struct ceph_entity_addr *mon_addr = opt->mon_addr; | |
782 | int num_mon = opt->num_mon; | |
6b805185 SW |
783 | int i; |
784 | ||
785 | /* build initial monmap */ | |
786 | monc->monmap = kzalloc(sizeof(*monc->monmap) + | |
787 | num_mon*sizeof(monc->monmap->mon_inst[0]), | |
788 | GFP_KERNEL); | |
789 | if (!monc->monmap) | |
790 | return -ENOMEM; | |
791 | for (i = 0; i < num_mon; i++) { | |
792 | monc->monmap->mon_inst[i].addr = mon_addr[i]; | |
6b805185 SW |
793 | monc->monmap->mon_inst[i].addr.nonce = 0; |
794 | monc->monmap->mon_inst[i].name.type = | |
795 | CEPH_ENTITY_TYPE_MON; | |
796 | monc->monmap->mon_inst[i].name.num = cpu_to_le64(i); | |
797 | } | |
798 | monc->monmap->num_mon = num_mon; | |
6b805185 SW |
799 | return 0; |
800 | } | |
801 | ||
ba75bb98 SW |
802 | int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl) |
803 | { | |
804 | int err = 0; | |
805 | ||
806 | dout("init\n"); | |
807 | memset(monc, 0, sizeof(*monc)); | |
808 | monc->client = cl; | |
809 | monc->monmap = NULL; | |
810 | mutex_init(&monc->mutex); | |
811 | ||
6b805185 SW |
812 | err = build_initial_monmap(monc); |
813 | if (err) | |
814 | goto out; | |
815 | ||
f6a2f5be | 816 | /* connection */ |
4e7a5dcd | 817 | /* authentication */ |
3d14c5d2 | 818 | monc->auth = ceph_auth_init(cl->options->name, |
8323c3aa | 819 | cl->options->key); |
49d9224c NW |
820 | if (IS_ERR(monc->auth)) { |
821 | err = PTR_ERR(monc->auth); | |
67130934 | 822 | goto out_monmap; |
49d9224c | 823 | } |
4e7a5dcd SW |
824 | monc->auth->want_keys = |
825 | CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON | | |
826 | CEPH_ENTITY_TYPE_OSD | CEPH_ENTITY_TYPE_MDS; | |
827 | ||
240ed68e | 828 | /* msgs */ |
a79832f2 | 829 | err = -ENOMEM; |
7c315c55 | 830 | monc->m_subscribe_ack = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE_ACK, |
34d23762 | 831 | sizeof(struct ceph_mon_subscribe_ack), |
b61c2763 | 832 | GFP_NOFS, true); |
a79832f2 | 833 | if (!monc->m_subscribe_ack) |
49d9224c | 834 | goto out_auth; |
6694d6b9 | 835 | |
b61c2763 SW |
836 | monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 96, GFP_NOFS, |
837 | true); | |
240ed68e SW |
838 | if (!monc->m_subscribe) |
839 | goto out_subscribe_ack; | |
840 | ||
b61c2763 SW |
841 | monc->m_auth_reply = ceph_msg_new(CEPH_MSG_AUTH_REPLY, 4096, GFP_NOFS, |
842 | true); | |
a79832f2 | 843 | if (!monc->m_auth_reply) |
240ed68e | 844 | goto out_subscribe; |
4e7a5dcd | 845 | |
b61c2763 | 846 | monc->m_auth = ceph_msg_new(CEPH_MSG_AUTH, 4096, GFP_NOFS, true); |
9bd2e6f8 | 847 | monc->pending_auth = 0; |
a79832f2 | 848 | if (!monc->m_auth) |
6694d6b9 | 849 | goto out_auth_reply; |
ba75bb98 | 850 | |
735a72ef SW |
851 | ceph_con_init(&monc->con, monc, &mon_con_ops, |
852 | &monc->client->msgr); | |
853 | ||
ba75bb98 | 854 | monc->cur_mon = -1; |
4e7a5dcd | 855 | monc->hunting = true; |
ba75bb98 SW |
856 | monc->sub_renew_after = jiffies; |
857 | monc->sub_sent = 0; | |
858 | ||
859 | INIT_DELAYED_WORK(&monc->delayed_work, delayed_work); | |
f8c76f6f YS |
860 | monc->generic_request_tree = RB_ROOT; |
861 | monc->num_generic_requests = 0; | |
ba75bb98 SW |
862 | monc->last_tid = 0; |
863 | ||
864 | monc->have_mdsmap = 0; | |
865 | monc->have_osdmap = 0; | |
866 | monc->want_next_osdmap = 1; | |
4e7a5dcd SW |
867 | return 0; |
868 | ||
6694d6b9 SW |
869 | out_auth_reply: |
870 | ceph_msg_put(monc->m_auth_reply); | |
240ed68e SW |
871 | out_subscribe: |
872 | ceph_msg_put(monc->m_subscribe); | |
7c315c55 SW |
873 | out_subscribe_ack: |
874 | ceph_msg_put(monc->m_subscribe_ack); | |
49d9224c NW |
875 | out_auth: |
876 | ceph_auth_destroy(monc->auth); | |
4e7a5dcd SW |
877 | out_monmap: |
878 | kfree(monc->monmap); | |
ba75bb98 SW |
879 | out: |
880 | return err; | |
881 | } | |
3d14c5d2 | 882 | EXPORT_SYMBOL(ceph_monc_init); |
ba75bb98 SW |
883 | |
884 | void ceph_monc_stop(struct ceph_mon_client *monc) | |
885 | { | |
886 | dout("stop\n"); | |
887 | cancel_delayed_work_sync(&monc->delayed_work); | |
888 | ||
889 | mutex_lock(&monc->mutex); | |
890 | __close_session(monc); | |
f6a2f5be | 891 | |
ba75bb98 SW |
892 | mutex_unlock(&monc->mutex); |
893 | ||
f3dea7ed SW |
894 | /* |
895 | * flush msgr queue before we destroy ourselves to ensure that: | |
896 | * - any work that references our embedded con is finished. | |
897 | * - any osd_client or other work that may reference an authorizer | |
898 | * finishes before we shut down the auth subsystem. | |
899 | */ | |
900 | ceph_msgr_flush(); | |
901 | ||
4e7a5dcd SW |
902 | ceph_auth_destroy(monc->auth); |
903 | ||
904 | ceph_msg_put(monc->m_auth); | |
6694d6b9 | 905 | ceph_msg_put(monc->m_auth_reply); |
240ed68e | 906 | ceph_msg_put(monc->m_subscribe); |
7c315c55 | 907 | ceph_msg_put(monc->m_subscribe_ack); |
ba75bb98 SW |
908 | |
909 | kfree(monc->monmap); | |
910 | } | |
3d14c5d2 | 911 | EXPORT_SYMBOL(ceph_monc_stop); |
ba75bb98 | 912 | |
4e7a5dcd SW |
913 | static void handle_auth_reply(struct ceph_mon_client *monc, |
914 | struct ceph_msg *msg) | |
915 | { | |
916 | int ret; | |
09c4d6a7 | 917 | int was_auth = 0; |
d1c338a5 | 918 | int had_debugfs_info, init_debugfs = 0; |
4e7a5dcd SW |
919 | |
920 | mutex_lock(&monc->mutex); | |
d1c338a5 | 921 | had_debugfs_info = have_debugfs_info(monc); |
27859f97 | 922 | was_auth = ceph_auth_is_authenticated(monc->auth); |
9bd2e6f8 | 923 | monc->pending_auth = 0; |
4e7a5dcd SW |
924 | ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base, |
925 | msg->front.iov_len, | |
926 | monc->m_auth->front.iov_base, | |
3cea4c30 | 927 | monc->m_auth->front_alloc_len); |
4e7a5dcd | 928 | if (ret < 0) { |
9bd2e6f8 | 929 | monc->client->auth_err = ret; |
03066f23 | 930 | wake_up_all(&monc->client->auth_wq); |
4e7a5dcd | 931 | } else if (ret > 0) { |
9bd2e6f8 | 932 | __send_prepared_auth_request(monc, ret); |
27859f97 | 933 | } else if (!was_auth && ceph_auth_is_authenticated(monc->auth)) { |
4e7a5dcd | 934 | dout("authenticated, starting session\n"); |
0743304d | 935 | |
15d9882c AE |
936 | monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT; |
937 | monc->client->msgr.inst.name.num = | |
0cf5537b | 938 | cpu_to_le64(monc->auth->global_id); |
0743304d | 939 | |
4e7a5dcd | 940 | __send_subscribe(monc); |
f8c76f6f | 941 | __resend_generic_request(monc); |
4e7a5dcd | 942 | } |
d1c338a5 SW |
943 | |
944 | if (!had_debugfs_info && have_debugfs_info(monc)) { | |
945 | pr_info("client%lld fsid %pU\n", | |
946 | ceph_client_id(monc->client), | |
947 | &monc->client->fsid); | |
948 | init_debugfs = 1; | |
949 | } | |
4e7a5dcd | 950 | mutex_unlock(&monc->mutex); |
d1c338a5 SW |
951 | |
952 | if (init_debugfs) { | |
953 | /* | |
954 | * do debugfs initialization without mutex to avoid | |
955 | * creating a locking dependency | |
956 | */ | |
957 | ceph_debugfs_client_init(monc->client); | |
958 | } | |
4e7a5dcd SW |
959 | } |
960 | ||
9bd2e6f8 SW |
961 | static int __validate_auth(struct ceph_mon_client *monc) |
962 | { | |
963 | int ret; | |
964 | ||
965 | if (monc->pending_auth) | |
966 | return 0; | |
967 | ||
968 | ret = ceph_build_auth(monc->auth, monc->m_auth->front.iov_base, | |
3cea4c30 | 969 | monc->m_auth->front_alloc_len); |
9bd2e6f8 SW |
970 | if (ret <= 0) |
971 | return ret; /* either an error, or no need to authenticate */ | |
972 | __send_prepared_auth_request(monc, ret); | |
973 | return 0; | |
974 | } | |
975 | ||
976 | int ceph_monc_validate_auth(struct ceph_mon_client *monc) | |
977 | { | |
978 | int ret; | |
979 | ||
980 | mutex_lock(&monc->mutex); | |
981 | ret = __validate_auth(monc); | |
982 | mutex_unlock(&monc->mutex); | |
983 | return ret; | |
984 | } | |
3d14c5d2 | 985 | EXPORT_SYMBOL(ceph_monc_validate_auth); |
9bd2e6f8 | 986 | |
ba75bb98 SW |
987 | /* |
988 | * handle incoming message | |
989 | */ | |
990 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
991 | { | |
992 | struct ceph_mon_client *monc = con->private; | |
993 | int type = le16_to_cpu(msg->hdr.type); | |
994 | ||
995 | if (!monc) | |
996 | return; | |
997 | ||
998 | switch (type) { | |
4e7a5dcd SW |
999 | case CEPH_MSG_AUTH_REPLY: |
1000 | handle_auth_reply(monc, msg); | |
ba75bb98 SW |
1001 | break; |
1002 | ||
1003 | case CEPH_MSG_MON_SUBSCRIBE_ACK: | |
1004 | handle_subscribe_ack(monc, msg); | |
1005 | break; | |
1006 | ||
1007 | case CEPH_MSG_STATFS_REPLY: | |
1008 | handle_statfs_reply(monc, msg); | |
1009 | break; | |
1010 | ||
513a8243 ID |
1011 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
1012 | handle_get_version_reply(monc, msg); | |
1013 | break; | |
1014 | ||
4e7a5dcd SW |
1015 | case CEPH_MSG_MON_MAP: |
1016 | ceph_monc_handle_map(monc, msg); | |
1017 | break; | |
1018 | ||
ba75bb98 SW |
1019 | case CEPH_MSG_OSD_MAP: |
1020 | ceph_osdc_handle_map(&monc->client->osdc, msg); | |
1021 | break; | |
1022 | ||
1023 | default: | |
3d14c5d2 YS |
1024 | /* can the chained handler handle it? */ |
1025 | if (monc->client->extra_mon_dispatch && | |
1026 | monc->client->extra_mon_dispatch(monc->client, msg) == 0) | |
1027 | break; | |
1028 | ||
ba75bb98 SW |
1029 | pr_err("received unknown message type %d %s\n", type, |
1030 | ceph_msg_type_name(type)); | |
1031 | } | |
1032 | ceph_msg_put(msg); | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * Allocate memory for incoming message | |
1037 | */ | |
1038 | static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, | |
2450418c YS |
1039 | struct ceph_msg_header *hdr, |
1040 | int *skip) | |
ba75bb98 SW |
1041 | { |
1042 | struct ceph_mon_client *monc = con->private; | |
1043 | int type = le16_to_cpu(hdr->type); | |
2450418c | 1044 | int front_len = le32_to_cpu(hdr->front_len); |
5b3a4db3 | 1045 | struct ceph_msg *m = NULL; |
ba75bb98 | 1046 | |
2450418c | 1047 | *skip = 0; |
0547a9b3 | 1048 | |
ba75bb98 | 1049 | switch (type) { |
ba75bb98 | 1050 | case CEPH_MSG_MON_SUBSCRIBE_ACK: |
7c315c55 | 1051 | m = ceph_msg_get(monc->m_subscribe_ack); |
2450418c | 1052 | break; |
ba75bb98 | 1053 | case CEPH_MSG_STATFS_REPLY: |
f8c76f6f | 1054 | return get_generic_reply(con, hdr, skip); |
4e7a5dcd | 1055 | case CEPH_MSG_AUTH_REPLY: |
6694d6b9 | 1056 | m = ceph_msg_get(monc->m_auth_reply); |
2450418c | 1057 | break; |
513a8243 ID |
1058 | case CEPH_MSG_MON_GET_VERSION_REPLY: |
1059 | if (le64_to_cpu(hdr->tid) != 0) | |
1060 | return get_generic_reply(con, hdr, skip); | |
1061 | ||
1062 | /* | |
1063 | * Older OSDs don't set reply tid even if the orignal | |
1064 | * request had a non-zero tid. Workaround this weirdness | |
1065 | * by falling through to the allocate case. | |
1066 | */ | |
5b3a4db3 SW |
1067 | case CEPH_MSG_MON_MAP: |
1068 | case CEPH_MSG_MDS_MAP: | |
1069 | case CEPH_MSG_OSD_MAP: | |
b61c2763 | 1070 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); |
1c20f2d2 AE |
1071 | if (!m) |
1072 | return NULL; /* ENOMEM--return skip == 0 */ | |
5b3a4db3 | 1073 | break; |
ba75bb98 | 1074 | } |
2450418c | 1075 | |
5b3a4db3 SW |
1076 | if (!m) { |
1077 | pr_info("alloc_msg unknown type %d\n", type); | |
2450418c | 1078 | *skip = 1; |
73c3d481 | 1079 | } else if (front_len > m->front_alloc_len) { |
b9a67899 JP |
1080 | pr_warn("mon_alloc_msg front %d > prealloc %d (%u#%llu)\n", |
1081 | front_len, m->front_alloc_len, | |
1082 | (unsigned int)con->peer_name.type, | |
1083 | le64_to_cpu(con->peer_name.num)); | |
73c3d481 SW |
1084 | ceph_msg_put(m); |
1085 | m = ceph_msg_new(type, front_len, GFP_NOFS, false); | |
5b3a4db3 | 1086 | } |
73c3d481 | 1087 | |
2450418c | 1088 | return m; |
ba75bb98 SW |
1089 | } |
1090 | ||
1091 | /* | |
1092 | * If the monitor connection resets, pick a new monitor and resubmit | |
1093 | * any pending requests. | |
1094 | */ | |
1095 | static void mon_fault(struct ceph_connection *con) | |
1096 | { | |
1097 | struct ceph_mon_client *monc = con->private; | |
1098 | ||
1099 | if (!monc) | |
1100 | return; | |
1101 | ||
1102 | dout("mon_fault\n"); | |
1103 | mutex_lock(&monc->mutex); | |
1104 | if (!con->private) | |
1105 | goto out; | |
1106 | ||
f6a2f5be | 1107 | if (!monc->hunting) |
ba75bb98 SW |
1108 | pr_info("mon%d %s session lost, " |
1109 | "hunting for new mon\n", monc->cur_mon, | |
67130934 | 1110 | ceph_pr_addr(&monc->con.peer_addr.in_addr)); |
ba75bb98 SW |
1111 | |
1112 | __close_session(monc); | |
1113 | if (!monc->hunting) { | |
1114 | /* start hunting */ | |
1115 | monc->hunting = true; | |
4e7a5dcd | 1116 | __open_session(monc); |
ba75bb98 SW |
1117 | } else { |
1118 | /* already hunting, let's wait a bit */ | |
1119 | __schedule_delayed(monc); | |
1120 | } | |
1121 | out: | |
1122 | mutex_unlock(&monc->mutex); | |
1123 | } | |
1124 | ||
ec87ef43 SW |
1125 | /* |
1126 | * We can ignore refcounting on the connection struct, as all references | |
1127 | * will come from the messenger workqueue, which is drained prior to | |
1128 | * mon_client destruction. | |
1129 | */ | |
1130 | static struct ceph_connection *con_get(struct ceph_connection *con) | |
1131 | { | |
1132 | return con; | |
1133 | } | |
1134 | ||
1135 | static void con_put(struct ceph_connection *con) | |
1136 | { | |
1137 | } | |
1138 | ||
9e32789f | 1139 | static const struct ceph_connection_operations mon_con_ops = { |
ec87ef43 SW |
1140 | .get = con_get, |
1141 | .put = con_put, | |
ba75bb98 SW |
1142 | .dispatch = dispatch, |
1143 | .fault = mon_fault, | |
1144 | .alloc_msg = mon_alloc_msg, | |
ba75bb98 | 1145 | }; |