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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
2f2dc053 | 3 | |
496e5955 | 4 | #include <linux/fs.h> |
2f2dc053 | 5 | #include <linux/wait.h> |
5a0e3ad6 | 6 | #include <linux/slab.h> |
54008399 | 7 | #include <linux/gfp.h> |
2f2dc053 | 8 | #include <linux/sched.h> |
3d14c5d2 YS |
9 | #include <linux/debugfs.h> |
10 | #include <linux/seq_file.h> | |
3e0708b9 | 11 | #include <linux/ratelimit.h> |
2f2dc053 | 12 | |
2f2dc053 | 13 | #include "super.h" |
3d14c5d2 YS |
14 | #include "mds_client.h" |
15 | ||
1fe60e51 | 16 | #include <linux/ceph/ceph_features.h> |
3d14c5d2 YS |
17 | #include <linux/ceph/messenger.h> |
18 | #include <linux/ceph/decode.h> | |
19 | #include <linux/ceph/pagelist.h> | |
20 | #include <linux/ceph/auth.h> | |
21 | #include <linux/ceph/debugfs.h> | |
2f2dc053 SW |
22 | |
23 | /* | |
24 | * A cluster of MDS (metadata server) daemons is responsible for | |
25 | * managing the file system namespace (the directory hierarchy and | |
26 | * inodes) and for coordinating shared access to storage. Metadata is | |
27 | * partitioning hierarchically across a number of servers, and that | |
28 | * partition varies over time as the cluster adjusts the distribution | |
29 | * in order to balance load. | |
30 | * | |
31 | * The MDS client is primarily responsible to managing synchronous | |
32 | * metadata requests for operations like open, unlink, and so forth. | |
33 | * If there is a MDS failure, we find out about it when we (possibly | |
34 | * request and) receive a new MDS map, and can resubmit affected | |
35 | * requests. | |
36 | * | |
37 | * For the most part, though, we take advantage of a lossless | |
38 | * communications channel to the MDS, and do not need to worry about | |
39 | * timing out or resubmitting requests. | |
40 | * | |
41 | * We maintain a stateful "session" with each MDS we interact with. | |
42 | * Within each session, we sent periodic heartbeat messages to ensure | |
43 | * any capabilities or leases we have been issues remain valid. If | |
44 | * the session times out and goes stale, our leases and capabilities | |
45 | * are no longer valid. | |
46 | */ | |
47 | ||
20cb34ae | 48 | struct ceph_reconnect_state { |
44c99757 | 49 | int nr_caps; |
20cb34ae | 50 | struct ceph_pagelist *pagelist; |
121f22a1 | 51 | unsigned msg_version; |
20cb34ae SW |
52 | }; |
53 | ||
2f2dc053 SW |
54 | static void __wake_requests(struct ceph_mds_client *mdsc, |
55 | struct list_head *head); | |
56 | ||
9e32789f | 57 | static const struct ceph_connection_operations mds_con_ops; |
2f2dc053 SW |
58 | |
59 | ||
60 | /* | |
61 | * mds reply parsing | |
62 | */ | |
63 | ||
64 | /* | |
65 | * parse individual inode info | |
66 | */ | |
67 | static int parse_reply_info_in(void **p, void *end, | |
14303d20 | 68 | struct ceph_mds_reply_info_in *info, |
12b4629a | 69 | u64 features) |
2f2dc053 SW |
70 | { |
71 | int err = -EIO; | |
72 | ||
73 | info->in = *p; | |
74 | *p += sizeof(struct ceph_mds_reply_inode) + | |
75 | sizeof(*info->in->fragtree.splits) * | |
76 | le32_to_cpu(info->in->fragtree.nsplits); | |
77 | ||
78 | ceph_decode_32_safe(p, end, info->symlink_len, bad); | |
79 | ceph_decode_need(p, end, info->symlink_len, bad); | |
80 | info->symlink = *p; | |
81 | *p += info->symlink_len; | |
82 | ||
14303d20 SW |
83 | if (features & CEPH_FEATURE_DIRLAYOUTHASH) |
84 | ceph_decode_copy_safe(p, end, &info->dir_layout, | |
85 | sizeof(info->dir_layout), bad); | |
86 | else | |
87 | memset(&info->dir_layout, 0, sizeof(info->dir_layout)); | |
88 | ||
2f2dc053 SW |
89 | ceph_decode_32_safe(p, end, info->xattr_len, bad); |
90 | ceph_decode_need(p, end, info->xattr_len, bad); | |
91 | info->xattr_data = *p; | |
92 | *p += info->xattr_len; | |
fb01d1f8 YZ |
93 | |
94 | if (features & CEPH_FEATURE_MDS_INLINE_DATA) { | |
95 | ceph_decode_64_safe(p, end, info->inline_version, bad); | |
96 | ceph_decode_32_safe(p, end, info->inline_len, bad); | |
97 | ceph_decode_need(p, end, info->inline_len, bad); | |
98 | info->inline_data = *p; | |
99 | *p += info->inline_len; | |
100 | } else | |
101 | info->inline_version = CEPH_INLINE_NONE; | |
102 | ||
fb18a575 LH |
103 | if (features & CEPH_FEATURE_MDS_QUOTA) { |
104 | u8 struct_v, struct_compat; | |
105 | u32 struct_len; | |
106 | ||
107 | /* | |
108 | * both struct_v and struct_compat are expected to be >= 1 | |
109 | */ | |
110 | ceph_decode_8_safe(p, end, struct_v, bad); | |
111 | ceph_decode_8_safe(p, end, struct_compat, bad); | |
112 | if (!struct_v || !struct_compat) | |
113 | goto bad; | |
114 | ceph_decode_32_safe(p, end, struct_len, bad); | |
115 | ceph_decode_need(p, end, struct_len, bad); | |
116 | ceph_decode_64_safe(p, end, info->max_bytes, bad); | |
117 | ceph_decode_64_safe(p, end, info->max_files, bad); | |
118 | } else { | |
119 | info->max_bytes = 0; | |
120 | info->max_files = 0; | |
121 | } | |
122 | ||
779fe0fb YZ |
123 | info->pool_ns_len = 0; |
124 | info->pool_ns_data = NULL; | |
5ea5c5e0 YZ |
125 | if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) { |
126 | ceph_decode_32_safe(p, end, info->pool_ns_len, bad); | |
779fe0fb YZ |
127 | if (info->pool_ns_len > 0) { |
128 | ceph_decode_need(p, end, info->pool_ns_len, bad); | |
129 | info->pool_ns_data = *p; | |
130 | *p += info->pool_ns_len; | |
131 | } | |
5ea5c5e0 YZ |
132 | } |
133 | ||
2f2dc053 SW |
134 | return 0; |
135 | bad: | |
136 | return err; | |
137 | } | |
138 | ||
139 | /* | |
140 | * parse a normal reply, which may contain a (dir+)dentry and/or a | |
141 | * target inode. | |
142 | */ | |
143 | static int parse_reply_info_trace(void **p, void *end, | |
14303d20 | 144 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 145 | u64 features) |
2f2dc053 SW |
146 | { |
147 | int err; | |
148 | ||
149 | if (info->head->is_dentry) { | |
14303d20 | 150 | err = parse_reply_info_in(p, end, &info->diri, features); |
2f2dc053 SW |
151 | if (err < 0) |
152 | goto out_bad; | |
153 | ||
154 | if (unlikely(*p + sizeof(*info->dirfrag) > end)) | |
155 | goto bad; | |
156 | info->dirfrag = *p; | |
157 | *p += sizeof(*info->dirfrag) + | |
158 | sizeof(u32)*le32_to_cpu(info->dirfrag->ndist); | |
159 | if (unlikely(*p > end)) | |
160 | goto bad; | |
161 | ||
162 | ceph_decode_32_safe(p, end, info->dname_len, bad); | |
163 | ceph_decode_need(p, end, info->dname_len, bad); | |
164 | info->dname = *p; | |
165 | *p += info->dname_len; | |
166 | info->dlease = *p; | |
167 | *p += sizeof(*info->dlease); | |
168 | } | |
169 | ||
170 | if (info->head->is_target) { | |
14303d20 | 171 | err = parse_reply_info_in(p, end, &info->targeti, features); |
2f2dc053 SW |
172 | if (err < 0) |
173 | goto out_bad; | |
174 | } | |
175 | ||
176 | if (unlikely(*p != end)) | |
177 | goto bad; | |
178 | return 0; | |
179 | ||
180 | bad: | |
181 | err = -EIO; | |
182 | out_bad: | |
183 | pr_err("problem parsing mds trace %d\n", err); | |
184 | return err; | |
185 | } | |
186 | ||
187 | /* | |
188 | * parse readdir results | |
189 | */ | |
190 | static int parse_reply_info_dir(void **p, void *end, | |
14303d20 | 191 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 192 | u64 features) |
2f2dc053 SW |
193 | { |
194 | u32 num, i = 0; | |
195 | int err; | |
196 | ||
197 | info->dir_dir = *p; | |
198 | if (*p + sizeof(*info->dir_dir) > end) | |
199 | goto bad; | |
200 | *p += sizeof(*info->dir_dir) + | |
201 | sizeof(u32)*le32_to_cpu(info->dir_dir->ndist); | |
202 | if (*p > end) | |
203 | goto bad; | |
204 | ||
205 | ceph_decode_need(p, end, sizeof(num) + 2, bad); | |
c89136ea | 206 | num = ceph_decode_32(p); |
956d39d6 YZ |
207 | { |
208 | u16 flags = ceph_decode_16(p); | |
209 | info->dir_end = !!(flags & CEPH_READDIR_FRAG_END); | |
210 | info->dir_complete = !!(flags & CEPH_READDIR_FRAG_COMPLETE); | |
f3c4ebe6 | 211 | info->hash_order = !!(flags & CEPH_READDIR_HASH_ORDER); |
79162547 | 212 | info->offset_hash = !!(flags & CEPH_READDIR_OFFSET_HASH); |
956d39d6 | 213 | } |
2f2dc053 SW |
214 | if (num == 0) |
215 | goto done; | |
216 | ||
2a5beea3 YZ |
217 | BUG_ON(!info->dir_entries); |
218 | if ((unsigned long)(info->dir_entries + num) > | |
219 | (unsigned long)info->dir_entries + info->dir_buf_size) { | |
54008399 YZ |
220 | pr_err("dir contents are larger than expected\n"); |
221 | WARN_ON(1); | |
222 | goto bad; | |
223 | } | |
2f2dc053 | 224 | |
54008399 | 225 | info->dir_nr = num; |
2f2dc053 | 226 | while (num) { |
2a5beea3 | 227 | struct ceph_mds_reply_dir_entry *rde = info->dir_entries + i; |
2f2dc053 SW |
228 | /* dentry */ |
229 | ceph_decode_need(p, end, sizeof(u32)*2, bad); | |
2a5beea3 YZ |
230 | rde->name_len = ceph_decode_32(p); |
231 | ceph_decode_need(p, end, rde->name_len, bad); | |
232 | rde->name = *p; | |
233 | *p += rde->name_len; | |
234 | dout("parsed dir dname '%.*s'\n", rde->name_len, rde->name); | |
235 | rde->lease = *p; | |
2f2dc053 SW |
236 | *p += sizeof(struct ceph_mds_reply_lease); |
237 | ||
238 | /* inode */ | |
2a5beea3 | 239 | err = parse_reply_info_in(p, end, &rde->inode, features); |
2f2dc053 SW |
240 | if (err < 0) |
241 | goto out_bad; | |
8974eebd YZ |
242 | /* ceph_readdir_prepopulate() will update it */ |
243 | rde->offset = 0; | |
2f2dc053 SW |
244 | i++; |
245 | num--; | |
246 | } | |
247 | ||
248 | done: | |
249 | if (*p != end) | |
250 | goto bad; | |
251 | return 0; | |
252 | ||
253 | bad: | |
254 | err = -EIO; | |
255 | out_bad: | |
256 | pr_err("problem parsing dir contents %d\n", err); | |
257 | return err; | |
258 | } | |
259 | ||
25933abd HS |
260 | /* |
261 | * parse fcntl F_GETLK results | |
262 | */ | |
263 | static int parse_reply_info_filelock(void **p, void *end, | |
14303d20 | 264 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 265 | u64 features) |
25933abd HS |
266 | { |
267 | if (*p + sizeof(*info->filelock_reply) > end) | |
268 | goto bad; | |
269 | ||
270 | info->filelock_reply = *p; | |
271 | *p += sizeof(*info->filelock_reply); | |
272 | ||
273 | if (unlikely(*p != end)) | |
274 | goto bad; | |
275 | return 0; | |
276 | ||
277 | bad: | |
278 | return -EIO; | |
279 | } | |
280 | ||
6e8575fa SL |
281 | /* |
282 | * parse create results | |
283 | */ | |
284 | static int parse_reply_info_create(void **p, void *end, | |
285 | struct ceph_mds_reply_info_parsed *info, | |
12b4629a | 286 | u64 features) |
6e8575fa SL |
287 | { |
288 | if (features & CEPH_FEATURE_REPLY_CREATE_INODE) { | |
289 | if (*p == end) { | |
290 | info->has_create_ino = false; | |
291 | } else { | |
292 | info->has_create_ino = true; | |
293 | info->ino = ceph_decode_64(p); | |
294 | } | |
295 | } | |
296 | ||
297 | if (unlikely(*p != end)) | |
298 | goto bad; | |
299 | return 0; | |
300 | ||
301 | bad: | |
302 | return -EIO; | |
303 | } | |
304 | ||
25933abd HS |
305 | /* |
306 | * parse extra results | |
307 | */ | |
308 | static int parse_reply_info_extra(void **p, void *end, | |
14303d20 | 309 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 310 | u64 features) |
25933abd | 311 | { |
6df8c9d8 JL |
312 | u32 op = le32_to_cpu(info->head->op); |
313 | ||
314 | if (op == CEPH_MDS_OP_GETFILELOCK) | |
14303d20 | 315 | return parse_reply_info_filelock(p, end, info, features); |
6df8c9d8 | 316 | else if (op == CEPH_MDS_OP_READDIR || op == CEPH_MDS_OP_LSSNAP) |
14303d20 | 317 | return parse_reply_info_dir(p, end, info, features); |
6df8c9d8 | 318 | else if (op == CEPH_MDS_OP_CREATE) |
6e8575fa SL |
319 | return parse_reply_info_create(p, end, info, features); |
320 | else | |
321 | return -EIO; | |
25933abd HS |
322 | } |
323 | ||
2f2dc053 SW |
324 | /* |
325 | * parse entire mds reply | |
326 | */ | |
327 | static int parse_reply_info(struct ceph_msg *msg, | |
14303d20 | 328 | struct ceph_mds_reply_info_parsed *info, |
12b4629a | 329 | u64 features) |
2f2dc053 SW |
330 | { |
331 | void *p, *end; | |
332 | u32 len; | |
333 | int err; | |
334 | ||
335 | info->head = msg->front.iov_base; | |
336 | p = msg->front.iov_base + sizeof(struct ceph_mds_reply_head); | |
337 | end = p + msg->front.iov_len - sizeof(struct ceph_mds_reply_head); | |
338 | ||
339 | /* trace */ | |
340 | ceph_decode_32_safe(&p, end, len, bad); | |
341 | if (len > 0) { | |
32852a81 | 342 | ceph_decode_need(&p, end, len, bad); |
14303d20 | 343 | err = parse_reply_info_trace(&p, p+len, info, features); |
2f2dc053 SW |
344 | if (err < 0) |
345 | goto out_bad; | |
346 | } | |
347 | ||
25933abd | 348 | /* extra */ |
2f2dc053 SW |
349 | ceph_decode_32_safe(&p, end, len, bad); |
350 | if (len > 0) { | |
32852a81 | 351 | ceph_decode_need(&p, end, len, bad); |
14303d20 | 352 | err = parse_reply_info_extra(&p, p+len, info, features); |
2f2dc053 SW |
353 | if (err < 0) |
354 | goto out_bad; | |
355 | } | |
356 | ||
357 | /* snap blob */ | |
358 | ceph_decode_32_safe(&p, end, len, bad); | |
359 | info->snapblob_len = len; | |
360 | info->snapblob = p; | |
361 | p += len; | |
362 | ||
363 | if (p != end) | |
364 | goto bad; | |
365 | return 0; | |
366 | ||
367 | bad: | |
368 | err = -EIO; | |
369 | out_bad: | |
370 | pr_err("mds parse_reply err %d\n", err); | |
371 | return err; | |
372 | } | |
373 | ||
374 | static void destroy_reply_info(struct ceph_mds_reply_info_parsed *info) | |
375 | { | |
2a5beea3 | 376 | if (!info->dir_entries) |
54008399 | 377 | return; |
2a5beea3 | 378 | free_pages((unsigned long)info->dir_entries, get_order(info->dir_buf_size)); |
2f2dc053 SW |
379 | } |
380 | ||
381 | ||
382 | /* | |
383 | * sessions | |
384 | */ | |
a687ecaf | 385 | const char *ceph_session_state_name(int s) |
2f2dc053 SW |
386 | { |
387 | switch (s) { | |
388 | case CEPH_MDS_SESSION_NEW: return "new"; | |
389 | case CEPH_MDS_SESSION_OPENING: return "opening"; | |
390 | case CEPH_MDS_SESSION_OPEN: return "open"; | |
391 | case CEPH_MDS_SESSION_HUNG: return "hung"; | |
392 | case CEPH_MDS_SESSION_CLOSING: return "closing"; | |
44ca18f2 | 393 | case CEPH_MDS_SESSION_RESTARTING: return "restarting"; |
2f2dc053 | 394 | case CEPH_MDS_SESSION_RECONNECTING: return "reconnecting"; |
fcff415c | 395 | case CEPH_MDS_SESSION_REJECTED: return "rejected"; |
2f2dc053 SW |
396 | default: return "???"; |
397 | } | |
398 | } | |
399 | ||
400 | static struct ceph_mds_session *get_session(struct ceph_mds_session *s) | |
401 | { | |
3997c01d | 402 | if (refcount_inc_not_zero(&s->s_ref)) { |
2f2dc053 | 403 | dout("mdsc get_session %p %d -> %d\n", s, |
3997c01d | 404 | refcount_read(&s->s_ref)-1, refcount_read(&s->s_ref)); |
2f2dc053 SW |
405 | return s; |
406 | } else { | |
4c069a58 | 407 | dout("mdsc get_session %p 0 -- FAIL\n", s); |
2f2dc053 SW |
408 | return NULL; |
409 | } | |
410 | } | |
411 | ||
412 | void ceph_put_mds_session(struct ceph_mds_session *s) | |
413 | { | |
414 | dout("mdsc put_session %p %d -> %d\n", s, | |
3997c01d ER |
415 | refcount_read(&s->s_ref), refcount_read(&s->s_ref)-1); |
416 | if (refcount_dec_and_test(&s->s_ref)) { | |
6c4a1915 | 417 | if (s->s_auth.authorizer) |
6c1ea260 | 418 | ceph_auth_destroy_authorizer(s->s_auth.authorizer); |
2f2dc053 | 419 | kfree(s); |
4e7a5dcd | 420 | } |
2f2dc053 SW |
421 | } |
422 | ||
423 | /* | |
424 | * called under mdsc->mutex | |
425 | */ | |
426 | struct ceph_mds_session *__ceph_lookup_mds_session(struct ceph_mds_client *mdsc, | |
427 | int mds) | |
428 | { | |
429 | struct ceph_mds_session *session; | |
430 | ||
d37b1d99 | 431 | if (mds >= mdsc->max_sessions || !mdsc->sessions[mds]) |
2f2dc053 SW |
432 | return NULL; |
433 | session = mdsc->sessions[mds]; | |
434 | dout("lookup_mds_session %p %d\n", session, | |
3997c01d | 435 | refcount_read(&session->s_ref)); |
2f2dc053 SW |
436 | get_session(session); |
437 | return session; | |
438 | } | |
439 | ||
440 | static bool __have_session(struct ceph_mds_client *mdsc, int mds) | |
441 | { | |
98cfda81 | 442 | if (mds >= mdsc->max_sessions || !mdsc->sessions[mds]) |
2f2dc053 | 443 | return false; |
98cfda81 CX |
444 | else |
445 | return true; | |
2f2dc053 SW |
446 | } |
447 | ||
2600d2dd SW |
448 | static int __verify_registered_session(struct ceph_mds_client *mdsc, |
449 | struct ceph_mds_session *s) | |
450 | { | |
451 | if (s->s_mds >= mdsc->max_sessions || | |
452 | mdsc->sessions[s->s_mds] != s) | |
453 | return -ENOENT; | |
454 | return 0; | |
455 | } | |
456 | ||
2f2dc053 SW |
457 | /* |
458 | * create+register a new session for given mds. | |
459 | * called under mdsc->mutex. | |
460 | */ | |
461 | static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc, | |
462 | int mds) | |
463 | { | |
464 | struct ceph_mds_session *s; | |
465 | ||
76201b63 | 466 | if (mds >= mdsc->mdsmap->m_num_mds) |
c338c07c NY |
467 | return ERR_PTR(-EINVAL); |
468 | ||
2f2dc053 | 469 | s = kzalloc(sizeof(*s), GFP_NOFS); |
4736b009 DC |
470 | if (!s) |
471 | return ERR_PTR(-ENOMEM); | |
47474d0b CX |
472 | |
473 | if (mds >= mdsc->max_sessions) { | |
474 | int newmax = 1 << get_count_order(mds + 1); | |
475 | struct ceph_mds_session **sa; | |
476 | ||
477 | dout("%s: realloc to %d\n", __func__, newmax); | |
478 | sa = kcalloc(newmax, sizeof(void *), GFP_NOFS); | |
479 | if (!sa) | |
480 | goto fail_realloc; | |
481 | if (mdsc->sessions) { | |
482 | memcpy(sa, mdsc->sessions, | |
483 | mdsc->max_sessions * sizeof(void *)); | |
484 | kfree(mdsc->sessions); | |
485 | } | |
486 | mdsc->sessions = sa; | |
487 | mdsc->max_sessions = newmax; | |
488 | } | |
489 | ||
490 | dout("%s: mds%d\n", __func__, mds); | |
2f2dc053 SW |
491 | s->s_mdsc = mdsc; |
492 | s->s_mds = mds; | |
493 | s->s_state = CEPH_MDS_SESSION_NEW; | |
494 | s->s_ttl = 0; | |
495 | s->s_seq = 0; | |
496 | mutex_init(&s->s_mutex); | |
497 | ||
b7a9e5dd | 498 | ceph_con_init(&s->s_con, s, &mds_con_ops, &mdsc->fsc->client->msgr); |
2f2dc053 | 499 | |
d8fb02ab | 500 | spin_lock_init(&s->s_gen_ttl_lock); |
2f2dc053 | 501 | s->s_cap_gen = 0; |
1ce208a6 | 502 | s->s_cap_ttl = jiffies - 1; |
d8fb02ab AE |
503 | |
504 | spin_lock_init(&s->s_cap_lock); | |
2f2dc053 SW |
505 | s->s_renew_requested = 0; |
506 | s->s_renew_seq = 0; | |
507 | INIT_LIST_HEAD(&s->s_caps); | |
508 | s->s_nr_caps = 0; | |
5dacf091 | 509 | s->s_trim_caps = 0; |
3997c01d | 510 | refcount_set(&s->s_ref, 1); |
2f2dc053 SW |
511 | INIT_LIST_HEAD(&s->s_waiting); |
512 | INIT_LIST_HEAD(&s->s_unsafe); | |
513 | s->s_num_cap_releases = 0; | |
99a9c273 | 514 | s->s_cap_reconnect = 0; |
7c1332b8 | 515 | s->s_cap_iterator = NULL; |
2f2dc053 | 516 | INIT_LIST_HEAD(&s->s_cap_releases); |
2f2dc053 | 517 | INIT_LIST_HEAD(&s->s_cap_flushing); |
2f2dc053 | 518 | |
2f2dc053 | 519 | mdsc->sessions[mds] = s; |
86d8f67b | 520 | atomic_inc(&mdsc->num_sessions); |
3997c01d | 521 | refcount_inc(&s->s_ref); /* one ref to sessions[], one to caller */ |
42ce56e5 | 522 | |
b7a9e5dd SW |
523 | ceph_con_open(&s->s_con, CEPH_ENTITY_TYPE_MDS, mds, |
524 | ceph_mdsmap_get_addr(mdsc->mdsmap, mds)); | |
42ce56e5 | 525 | |
2f2dc053 | 526 | return s; |
42ce56e5 SW |
527 | |
528 | fail_realloc: | |
529 | kfree(s); | |
530 | return ERR_PTR(-ENOMEM); | |
2f2dc053 SW |
531 | } |
532 | ||
533 | /* | |
534 | * called under mdsc->mutex | |
535 | */ | |
2600d2dd | 536 | static void __unregister_session(struct ceph_mds_client *mdsc, |
42ce56e5 | 537 | struct ceph_mds_session *s) |
2f2dc053 | 538 | { |
2600d2dd SW |
539 | dout("__unregister_session mds%d %p\n", s->s_mds, s); |
540 | BUG_ON(mdsc->sessions[s->s_mds] != s); | |
42ce56e5 SW |
541 | mdsc->sessions[s->s_mds] = NULL; |
542 | ceph_con_close(&s->s_con); | |
543 | ceph_put_mds_session(s); | |
86d8f67b | 544 | atomic_dec(&mdsc->num_sessions); |
2f2dc053 SW |
545 | } |
546 | ||
547 | /* | |
548 | * drop session refs in request. | |
549 | * | |
550 | * should be last request ref, or hold mdsc->mutex | |
551 | */ | |
552 | static void put_request_session(struct ceph_mds_request *req) | |
553 | { | |
554 | if (req->r_session) { | |
555 | ceph_put_mds_session(req->r_session); | |
556 | req->r_session = NULL; | |
557 | } | |
558 | } | |
559 | ||
153c8e6b | 560 | void ceph_mdsc_release_request(struct kref *kref) |
2f2dc053 | 561 | { |
153c8e6b SW |
562 | struct ceph_mds_request *req = container_of(kref, |
563 | struct ceph_mds_request, | |
564 | r_kref); | |
54008399 | 565 | destroy_reply_info(&req->r_reply_info); |
153c8e6b SW |
566 | if (req->r_request) |
567 | ceph_msg_put(req->r_request); | |
54008399 | 568 | if (req->r_reply) |
153c8e6b | 569 | ceph_msg_put(req->r_reply); |
153c8e6b | 570 | if (req->r_inode) { |
41b02e1f | 571 | ceph_put_cap_refs(ceph_inode(req->r_inode), CEPH_CAP_PIN); |
153c8e6b SW |
572 | iput(req->r_inode); |
573 | } | |
3dd69aab JL |
574 | if (req->r_parent) |
575 | ceph_put_cap_refs(ceph_inode(req->r_parent), CEPH_CAP_PIN); | |
e96a650a | 576 | iput(req->r_target_inode); |
153c8e6b SW |
577 | if (req->r_dentry) |
578 | dput(req->r_dentry); | |
844d87c3 SW |
579 | if (req->r_old_dentry) |
580 | dput(req->r_old_dentry); | |
581 | if (req->r_old_dentry_dir) { | |
41b02e1f SW |
582 | /* |
583 | * track (and drop pins for) r_old_dentry_dir | |
584 | * separately, since r_old_dentry's d_parent may have | |
585 | * changed between the dir mutex being dropped and | |
586 | * this request being freed. | |
587 | */ | |
588 | ceph_put_cap_refs(ceph_inode(req->r_old_dentry_dir), | |
589 | CEPH_CAP_PIN); | |
41b02e1f | 590 | iput(req->r_old_dentry_dir); |
2f2dc053 | 591 | } |
153c8e6b SW |
592 | kfree(req->r_path1); |
593 | kfree(req->r_path2); | |
25e6bae3 YZ |
594 | if (req->r_pagelist) |
595 | ceph_pagelist_release(req->r_pagelist); | |
153c8e6b | 596 | put_request_session(req); |
37151668 | 597 | ceph_unreserve_caps(req->r_mdsc, &req->r_caps_reservation); |
153c8e6b | 598 | kfree(req); |
2f2dc053 SW |
599 | } |
600 | ||
fcd00b68 ID |
601 | DEFINE_RB_FUNCS(request, struct ceph_mds_request, r_tid, r_node) |
602 | ||
2f2dc053 SW |
603 | /* |
604 | * lookup session, bump ref if found. | |
605 | * | |
606 | * called under mdsc->mutex. | |
607 | */ | |
fcd00b68 ID |
608 | static struct ceph_mds_request * |
609 | lookup_get_request(struct ceph_mds_client *mdsc, u64 tid) | |
2f2dc053 SW |
610 | { |
611 | struct ceph_mds_request *req; | |
44ca18f2 | 612 | |
fcd00b68 ID |
613 | req = lookup_request(&mdsc->request_tree, tid); |
614 | if (req) | |
615 | ceph_mdsc_get_request(req); | |
44ca18f2 | 616 | |
fcd00b68 | 617 | return req; |
2f2dc053 SW |
618 | } |
619 | ||
620 | /* | |
621 | * Register an in-flight request, and assign a tid. Link to directory | |
622 | * are modifying (if any). | |
623 | * | |
624 | * Called under mdsc->mutex. | |
625 | */ | |
626 | static void __register_request(struct ceph_mds_client *mdsc, | |
627 | struct ceph_mds_request *req, | |
628 | struct inode *dir) | |
629 | { | |
e30ee581 ZZ |
630 | int ret = 0; |
631 | ||
2f2dc053 | 632 | req->r_tid = ++mdsc->last_tid; |
e30ee581 ZZ |
633 | if (req->r_num_caps) { |
634 | ret = ceph_reserve_caps(mdsc, &req->r_caps_reservation, | |
635 | req->r_num_caps); | |
636 | if (ret < 0) { | |
637 | pr_err("__register_request %p " | |
638 | "failed to reserve caps: %d\n", req, ret); | |
639 | /* set req->r_err to fail early from __do_request */ | |
640 | req->r_err = ret; | |
641 | return; | |
642 | } | |
643 | } | |
2f2dc053 SW |
644 | dout("__register_request %p tid %lld\n", req, req->r_tid); |
645 | ceph_mdsc_get_request(req); | |
fcd00b68 | 646 | insert_request(&mdsc->request_tree, req); |
2f2dc053 | 647 | |
cb4276cc SW |
648 | req->r_uid = current_fsuid(); |
649 | req->r_gid = current_fsgid(); | |
650 | ||
e8a7b8b1 YZ |
651 | if (mdsc->oldest_tid == 0 && req->r_op != CEPH_MDS_OP_SETFILELOCK) |
652 | mdsc->oldest_tid = req->r_tid; | |
653 | ||
2f2dc053 | 654 | if (dir) { |
3b663780 | 655 | ihold(dir); |
2f2dc053 | 656 | req->r_unsafe_dir = dir; |
2f2dc053 SW |
657 | } |
658 | } | |
659 | ||
660 | static void __unregister_request(struct ceph_mds_client *mdsc, | |
661 | struct ceph_mds_request *req) | |
662 | { | |
663 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); | |
e8a7b8b1 | 664 | |
df963ea8 JL |
665 | /* Never leave an unregistered request on an unsafe list! */ |
666 | list_del_init(&req->r_unsafe_item); | |
667 | ||
e8a7b8b1 YZ |
668 | if (req->r_tid == mdsc->oldest_tid) { |
669 | struct rb_node *p = rb_next(&req->r_node); | |
670 | mdsc->oldest_tid = 0; | |
671 | while (p) { | |
672 | struct ceph_mds_request *next_req = | |
673 | rb_entry(p, struct ceph_mds_request, r_node); | |
674 | if (next_req->r_op != CEPH_MDS_OP_SETFILELOCK) { | |
675 | mdsc->oldest_tid = next_req->r_tid; | |
676 | break; | |
677 | } | |
678 | p = rb_next(p); | |
679 | } | |
680 | } | |
681 | ||
fcd00b68 | 682 | erase_request(&mdsc->request_tree, req); |
2f2dc053 | 683 | |
bc2de10d JL |
684 | if (req->r_unsafe_dir && |
685 | test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { | |
2f2dc053 | 686 | struct ceph_inode_info *ci = ceph_inode(req->r_unsafe_dir); |
2f2dc053 SW |
687 | spin_lock(&ci->i_unsafe_lock); |
688 | list_del_init(&req->r_unsafe_dir_item); | |
689 | spin_unlock(&ci->i_unsafe_lock); | |
4c06ace8 | 690 | } |
bc2de10d JL |
691 | if (req->r_target_inode && |
692 | test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { | |
68cd5b4b YZ |
693 | struct ceph_inode_info *ci = ceph_inode(req->r_target_inode); |
694 | spin_lock(&ci->i_unsafe_lock); | |
695 | list_del_init(&req->r_unsafe_target_item); | |
696 | spin_unlock(&ci->i_unsafe_lock); | |
697 | } | |
3b663780 | 698 | |
4c06ace8 | 699 | if (req->r_unsafe_dir) { |
3b663780 SW |
700 | iput(req->r_unsafe_dir); |
701 | req->r_unsafe_dir = NULL; | |
2f2dc053 | 702 | } |
94aa8ae1 | 703 | |
fc55d2c9 YZ |
704 | complete_all(&req->r_safe_completion); |
705 | ||
94aa8ae1 | 706 | ceph_mdsc_put_request(req); |
2f2dc053 SW |
707 | } |
708 | ||
30c71233 JL |
709 | /* |
710 | * Walk back up the dentry tree until we hit a dentry representing a | |
711 | * non-snapshot inode. We do this using the rcu_read_lock (which must be held | |
712 | * when calling this) to ensure that the objects won't disappear while we're | |
713 | * working with them. Once we hit a candidate dentry, we attempt to take a | |
714 | * reference to it, and return that as the result. | |
715 | */ | |
f1075480 DC |
716 | static struct inode *get_nonsnap_parent(struct dentry *dentry) |
717 | { | |
718 | struct inode *inode = NULL; | |
30c71233 JL |
719 | |
720 | while (dentry && !IS_ROOT(dentry)) { | |
721 | inode = d_inode_rcu(dentry); | |
722 | if (!inode || ceph_snap(inode) == CEPH_NOSNAP) | |
723 | break; | |
724 | dentry = dentry->d_parent; | |
725 | } | |
726 | if (inode) | |
727 | inode = igrab(inode); | |
728 | return inode; | |
729 | } | |
730 | ||
2f2dc053 SW |
731 | /* |
732 | * Choose mds to send request to next. If there is a hint set in the | |
733 | * request (e.g., due to a prior forward hint from the mds), use that. | |
734 | * Otherwise, consult frag tree and/or caps to identify the | |
735 | * appropriate mds. If all else fails, choose randomly. | |
736 | * | |
737 | * Called under mdsc->mutex. | |
738 | */ | |
739 | static int __choose_mds(struct ceph_mds_client *mdsc, | |
740 | struct ceph_mds_request *req) | |
741 | { | |
742 | struct inode *inode; | |
743 | struct ceph_inode_info *ci; | |
744 | struct ceph_cap *cap; | |
745 | int mode = req->r_direct_mode; | |
746 | int mds = -1; | |
747 | u32 hash = req->r_direct_hash; | |
bc2de10d | 748 | bool is_hash = test_bit(CEPH_MDS_R_DIRECT_IS_HASH, &req->r_req_flags); |
2f2dc053 SW |
749 | |
750 | /* | |
751 | * is there a specific mds we should try? ignore hint if we have | |
752 | * no session and the mds is not up (active or recovering). | |
753 | */ | |
754 | if (req->r_resend_mds >= 0 && | |
755 | (__have_session(mdsc, req->r_resend_mds) || | |
756 | ceph_mdsmap_get_state(mdsc->mdsmap, req->r_resend_mds) > 0)) { | |
757 | dout("choose_mds using resend_mds mds%d\n", | |
758 | req->r_resend_mds); | |
759 | return req->r_resend_mds; | |
760 | } | |
761 | ||
762 | if (mode == USE_RANDOM_MDS) | |
763 | goto random; | |
764 | ||
765 | inode = NULL; | |
766 | if (req->r_inode) { | |
5d37ca14 YZ |
767 | if (ceph_snap(req->r_inode) != CEPH_SNAPDIR) { |
768 | inode = req->r_inode; | |
769 | ihold(inode); | |
770 | } else { | |
38f340cc YZ |
771 | /* req->r_dentry is non-null for LSSNAP request */ |
772 | rcu_read_lock(); | |
773 | inode = get_nonsnap_parent(req->r_dentry); | |
774 | rcu_read_unlock(); | |
775 | dout("__choose_mds using snapdir's parent %p\n", inode); | |
5d37ca14 | 776 | } |
38f340cc | 777 | } else if (req->r_dentry) { |
d79698da | 778 | /* ignore race with rename; old or new d_parent is okay */ |
30c71233 JL |
779 | struct dentry *parent; |
780 | struct inode *dir; | |
781 | ||
782 | rcu_read_lock(); | |
783 | parent = req->r_dentry->d_parent; | |
3dd69aab | 784 | dir = req->r_parent ? : d_inode_rcu(parent); |
eb6bb1c5 | 785 | |
30c71233 JL |
786 | if (!dir || dir->i_sb != mdsc->fsc->sb) { |
787 | /* not this fs or parent went negative */ | |
2b0143b5 | 788 | inode = d_inode(req->r_dentry); |
30c71233 JL |
789 | if (inode) |
790 | ihold(inode); | |
eb6bb1c5 SW |
791 | } else if (ceph_snap(dir) != CEPH_NOSNAP) { |
792 | /* direct snapped/virtual snapdir requests | |
793 | * based on parent dir inode */ | |
30c71233 | 794 | inode = get_nonsnap_parent(parent); |
eb6bb1c5 | 795 | dout("__choose_mds using nonsnap parent %p\n", inode); |
ca18bede | 796 | } else { |
eb6bb1c5 | 797 | /* dentry target */ |
2b0143b5 | 798 | inode = d_inode(req->r_dentry); |
ca18bede YZ |
799 | if (!inode || mode == USE_AUTH_MDS) { |
800 | /* dir + name */ | |
30c71233 | 801 | inode = igrab(dir); |
ca18bede YZ |
802 | hash = ceph_dentry_hash(dir, req->r_dentry); |
803 | is_hash = true; | |
30c71233 JL |
804 | } else { |
805 | ihold(inode); | |
ca18bede | 806 | } |
2f2dc053 | 807 | } |
30c71233 | 808 | rcu_read_unlock(); |
2f2dc053 | 809 | } |
eb6bb1c5 | 810 | |
2f2dc053 SW |
811 | dout("__choose_mds %p is_hash=%d (%d) mode %d\n", inode, (int)is_hash, |
812 | (int)hash, mode); | |
813 | if (!inode) | |
814 | goto random; | |
815 | ci = ceph_inode(inode); | |
816 | ||
817 | if (is_hash && S_ISDIR(inode->i_mode)) { | |
818 | struct ceph_inode_frag frag; | |
819 | int found; | |
820 | ||
821 | ceph_choose_frag(ci, hash, &frag, &found); | |
822 | if (found) { | |
823 | if (mode == USE_ANY_MDS && frag.ndist > 0) { | |
824 | u8 r; | |
825 | ||
826 | /* choose a random replica */ | |
827 | get_random_bytes(&r, 1); | |
828 | r %= frag.ndist; | |
829 | mds = frag.dist[r]; | |
830 | dout("choose_mds %p %llx.%llx " | |
831 | "frag %u mds%d (%d/%d)\n", | |
832 | inode, ceph_vinop(inode), | |
d66bbd44 | 833 | frag.frag, mds, |
2f2dc053 | 834 | (int)r, frag.ndist); |
d66bbd44 SW |
835 | if (ceph_mdsmap_get_state(mdsc->mdsmap, mds) >= |
836 | CEPH_MDS_STATE_ACTIVE) | |
30c71233 | 837 | goto out; |
2f2dc053 SW |
838 | } |
839 | ||
840 | /* since this file/dir wasn't known to be | |
841 | * replicated, then we want to look for the | |
842 | * authoritative mds. */ | |
843 | mode = USE_AUTH_MDS; | |
844 | if (frag.mds >= 0) { | |
845 | /* choose auth mds */ | |
846 | mds = frag.mds; | |
847 | dout("choose_mds %p %llx.%llx " | |
848 | "frag %u mds%d (auth)\n", | |
849 | inode, ceph_vinop(inode), frag.frag, mds); | |
d66bbd44 SW |
850 | if (ceph_mdsmap_get_state(mdsc->mdsmap, mds) >= |
851 | CEPH_MDS_STATE_ACTIVE) | |
30c71233 | 852 | goto out; |
2f2dc053 SW |
853 | } |
854 | } | |
855 | } | |
856 | ||
be655596 | 857 | spin_lock(&ci->i_ceph_lock); |
2f2dc053 SW |
858 | cap = NULL; |
859 | if (mode == USE_AUTH_MDS) | |
860 | cap = ci->i_auth_cap; | |
861 | if (!cap && !RB_EMPTY_ROOT(&ci->i_caps)) | |
862 | cap = rb_entry(rb_first(&ci->i_caps), struct ceph_cap, ci_node); | |
863 | if (!cap) { | |
be655596 | 864 | spin_unlock(&ci->i_ceph_lock); |
30c71233 | 865 | iput(inode); |
2f2dc053 SW |
866 | goto random; |
867 | } | |
868 | mds = cap->session->s_mds; | |
869 | dout("choose_mds %p %llx.%llx mds%d (%scap %p)\n", | |
870 | inode, ceph_vinop(inode), mds, | |
871 | cap == ci->i_auth_cap ? "auth " : "", cap); | |
be655596 | 872 | spin_unlock(&ci->i_ceph_lock); |
30c71233 JL |
873 | out: |
874 | iput(inode); | |
2f2dc053 SW |
875 | return mds; |
876 | ||
877 | random: | |
878 | mds = ceph_mdsmap_get_random_mds(mdsc->mdsmap); | |
879 | dout("choose_mds chose random mds%d\n", mds); | |
880 | return mds; | |
881 | } | |
882 | ||
883 | ||
884 | /* | |
885 | * session messages | |
886 | */ | |
887 | static struct ceph_msg *create_session_msg(u32 op, u64 seq) | |
888 | { | |
889 | struct ceph_msg *msg; | |
890 | struct ceph_mds_session_head *h; | |
891 | ||
b61c2763 SW |
892 | msg = ceph_msg_new(CEPH_MSG_CLIENT_SESSION, sizeof(*h), GFP_NOFS, |
893 | false); | |
a79832f2 | 894 | if (!msg) { |
2f2dc053 | 895 | pr_err("create_session_msg ENOMEM creating msg\n"); |
a79832f2 | 896 | return NULL; |
2f2dc053 SW |
897 | } |
898 | h = msg->front.iov_base; | |
899 | h->op = cpu_to_le32(op); | |
900 | h->seq = cpu_to_le64(seq); | |
dbd0c8bf JS |
901 | |
902 | return msg; | |
903 | } | |
904 | ||
342ce182 YZ |
905 | static void encode_supported_features(void **p, void *end) |
906 | { | |
907 | static const unsigned char bits[] = CEPHFS_FEATURES_CLIENT_SUPPORTED; | |
908 | static const size_t count = ARRAY_SIZE(bits); | |
909 | ||
910 | if (count > 0) { | |
911 | size_t i; | |
912 | size_t size = ((size_t)bits[count - 1] + 64) / 64 * 8; | |
913 | ||
914 | BUG_ON(*p + 4 + size > end); | |
915 | ceph_encode_32(p, size); | |
916 | memset(*p, 0, size); | |
917 | for (i = 0; i < count; i++) | |
918 | ((unsigned char*)(*p))[i / 8] |= 1 << (bits[i] % 8); | |
919 | *p += size; | |
920 | } else { | |
921 | BUG_ON(*p + 4 > end); | |
922 | ceph_encode_32(p, 0); | |
923 | } | |
924 | } | |
925 | ||
dbd0c8bf JS |
926 | /* |
927 | * session message, specialization for CEPH_SESSION_REQUEST_OPEN | |
928 | * to include additional client metadata fields. | |
929 | */ | |
930 | static struct ceph_msg *create_session_open_msg(struct ceph_mds_client *mdsc, u64 seq) | |
931 | { | |
932 | struct ceph_msg *msg; | |
933 | struct ceph_mds_session_head *h; | |
934 | int i = -1; | |
342ce182 | 935 | int extra_bytes = 0; |
dbd0c8bf JS |
936 | int metadata_key_count = 0; |
937 | struct ceph_options *opt = mdsc->fsc->client->options; | |
3f384954 | 938 | struct ceph_mount_options *fsopt = mdsc->fsc->mount_options; |
342ce182 | 939 | void *p, *end; |
dbd0c8bf | 940 | |
a6a5ce4f | 941 | const char* metadata[][2] = { |
717e6f28 YZ |
942 | {"hostname", mdsc->nodename}, |
943 | {"kernel_version", init_utsname()->release}, | |
3f384954 YZ |
944 | {"entity_id", opt->name ? : ""}, |
945 | {"root", fsopt->server_path ? : "/"}, | |
dbd0c8bf JS |
946 | {NULL, NULL} |
947 | }; | |
948 | ||
949 | /* Calculate serialized length of metadata */ | |
342ce182 | 950 | extra_bytes = 4; /* map length */ |
d37b1d99 | 951 | for (i = 0; metadata[i][0]; ++i) { |
342ce182 | 952 | extra_bytes += 8 + strlen(metadata[i][0]) + |
dbd0c8bf JS |
953 | strlen(metadata[i][1]); |
954 | metadata_key_count++; | |
955 | } | |
342ce182 YZ |
956 | /* supported feature */ |
957 | extra_bytes += 4 + 8; | |
dbd0c8bf JS |
958 | |
959 | /* Allocate the message */ | |
342ce182 | 960 | msg = ceph_msg_new(CEPH_MSG_CLIENT_SESSION, sizeof(*h) + extra_bytes, |
dbd0c8bf JS |
961 | GFP_NOFS, false); |
962 | if (!msg) { | |
963 | pr_err("create_session_msg ENOMEM creating msg\n"); | |
964 | return NULL; | |
965 | } | |
342ce182 YZ |
966 | p = msg->front.iov_base; |
967 | end = p + msg->front.iov_len; | |
968 | ||
969 | h = p; | |
dbd0c8bf JS |
970 | h->op = cpu_to_le32(CEPH_SESSION_REQUEST_OPEN); |
971 | h->seq = cpu_to_le64(seq); | |
972 | ||
973 | /* | |
974 | * Serialize client metadata into waiting buffer space, using | |
975 | * the format that userspace expects for map<string, string> | |
7cfa0313 JS |
976 | * |
977 | * ClientSession messages with metadata are v2 | |
dbd0c8bf | 978 | */ |
342ce182 | 979 | msg->hdr.version = cpu_to_le16(3); |
7cfa0313 | 980 | msg->hdr.compat_version = cpu_to_le16(1); |
dbd0c8bf JS |
981 | |
982 | /* The write pointer, following the session_head structure */ | |
342ce182 | 983 | p += sizeof(*h); |
dbd0c8bf JS |
984 | |
985 | /* Number of entries in the map */ | |
986 | ceph_encode_32(&p, metadata_key_count); | |
987 | ||
988 | /* Two length-prefixed strings for each entry in the map */ | |
d37b1d99 | 989 | for (i = 0; metadata[i][0]; ++i) { |
dbd0c8bf JS |
990 | size_t const key_len = strlen(metadata[i][0]); |
991 | size_t const val_len = strlen(metadata[i][1]); | |
992 | ||
993 | ceph_encode_32(&p, key_len); | |
994 | memcpy(p, metadata[i][0], key_len); | |
995 | p += key_len; | |
996 | ceph_encode_32(&p, val_len); | |
997 | memcpy(p, metadata[i][1], val_len); | |
998 | p += val_len; | |
999 | } | |
1000 | ||
342ce182 YZ |
1001 | encode_supported_features(&p, end); |
1002 | msg->front.iov_len = p - msg->front.iov_base; | |
1003 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
1004 | ||
2f2dc053 SW |
1005 | return msg; |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | * send session open request. | |
1010 | * | |
1011 | * called under mdsc->mutex | |
1012 | */ | |
1013 | static int __open_session(struct ceph_mds_client *mdsc, | |
1014 | struct ceph_mds_session *session) | |
1015 | { | |
1016 | struct ceph_msg *msg; | |
1017 | int mstate; | |
1018 | int mds = session->s_mds; | |
2f2dc053 SW |
1019 | |
1020 | /* wait for mds to go active? */ | |
1021 | mstate = ceph_mdsmap_get_state(mdsc->mdsmap, mds); | |
1022 | dout("open_session to mds%d (%s)\n", mds, | |
1023 | ceph_mds_state_name(mstate)); | |
1024 | session->s_state = CEPH_MDS_SESSION_OPENING; | |
1025 | session->s_renew_requested = jiffies; | |
1026 | ||
1027 | /* send connect message */ | |
dbd0c8bf | 1028 | msg = create_session_open_msg(mdsc, session->s_seq); |
a79832f2 SW |
1029 | if (!msg) |
1030 | return -ENOMEM; | |
2f2dc053 | 1031 | ceph_con_send(&session->s_con, msg); |
2f2dc053 SW |
1032 | return 0; |
1033 | } | |
1034 | ||
ed0552a1 SW |
1035 | /* |
1036 | * open sessions for any export targets for the given mds | |
1037 | * | |
1038 | * called under mdsc->mutex | |
1039 | */ | |
5d72d13c YZ |
1040 | static struct ceph_mds_session * |
1041 | __open_export_target_session(struct ceph_mds_client *mdsc, int target) | |
1042 | { | |
1043 | struct ceph_mds_session *session; | |
1044 | ||
1045 | session = __ceph_lookup_mds_session(mdsc, target); | |
1046 | if (!session) { | |
1047 | session = register_session(mdsc, target); | |
1048 | if (IS_ERR(session)) | |
1049 | return session; | |
1050 | } | |
1051 | if (session->s_state == CEPH_MDS_SESSION_NEW || | |
1052 | session->s_state == CEPH_MDS_SESSION_CLOSING) | |
1053 | __open_session(mdsc, session); | |
1054 | ||
1055 | return session; | |
1056 | } | |
1057 | ||
1058 | struct ceph_mds_session * | |
1059 | ceph_mdsc_open_export_target_session(struct ceph_mds_client *mdsc, int target) | |
1060 | { | |
1061 | struct ceph_mds_session *session; | |
1062 | ||
1063 | dout("open_export_target_session to mds%d\n", target); | |
1064 | ||
1065 | mutex_lock(&mdsc->mutex); | |
1066 | session = __open_export_target_session(mdsc, target); | |
1067 | mutex_unlock(&mdsc->mutex); | |
1068 | ||
1069 | return session; | |
1070 | } | |
1071 | ||
ed0552a1 SW |
1072 | static void __open_export_target_sessions(struct ceph_mds_client *mdsc, |
1073 | struct ceph_mds_session *session) | |
1074 | { | |
1075 | struct ceph_mds_info *mi; | |
1076 | struct ceph_mds_session *ts; | |
1077 | int i, mds = session->s_mds; | |
ed0552a1 | 1078 | |
76201b63 | 1079 | if (mds >= mdsc->mdsmap->m_num_mds) |
ed0552a1 | 1080 | return; |
5d72d13c | 1081 | |
ed0552a1 SW |
1082 | mi = &mdsc->mdsmap->m_info[mds]; |
1083 | dout("open_export_target_sessions for mds%d (%d targets)\n", | |
1084 | session->s_mds, mi->num_export_targets); | |
1085 | ||
1086 | for (i = 0; i < mi->num_export_targets; i++) { | |
5d72d13c YZ |
1087 | ts = __open_export_target_session(mdsc, mi->export_targets[i]); |
1088 | if (!IS_ERR(ts)) | |
1089 | ceph_put_mds_session(ts); | |
ed0552a1 SW |
1090 | } |
1091 | } | |
1092 | ||
154f42c2 SW |
1093 | void ceph_mdsc_open_export_target_sessions(struct ceph_mds_client *mdsc, |
1094 | struct ceph_mds_session *session) | |
1095 | { | |
1096 | mutex_lock(&mdsc->mutex); | |
1097 | __open_export_target_sessions(mdsc, session); | |
1098 | mutex_unlock(&mdsc->mutex); | |
1099 | } | |
1100 | ||
2f2dc053 SW |
1101 | /* |
1102 | * session caps | |
1103 | */ | |
1104 | ||
c8a96a31 JL |
1105 | static void detach_cap_releases(struct ceph_mds_session *session, |
1106 | struct list_head *target) | |
2f2dc053 | 1107 | { |
c8a96a31 JL |
1108 | lockdep_assert_held(&session->s_cap_lock); |
1109 | ||
1110 | list_splice_init(&session->s_cap_releases, target); | |
745a8e3b | 1111 | session->s_num_cap_releases = 0; |
c8a96a31 JL |
1112 | dout("dispose_cap_releases mds%d\n", session->s_mds); |
1113 | } | |
2f2dc053 | 1114 | |
c8a96a31 JL |
1115 | static void dispose_cap_releases(struct ceph_mds_client *mdsc, |
1116 | struct list_head *dispose) | |
1117 | { | |
1118 | while (!list_empty(dispose)) { | |
745a8e3b YZ |
1119 | struct ceph_cap *cap; |
1120 | /* zero out the in-progress message */ | |
c8a96a31 | 1121 | cap = list_first_entry(dispose, struct ceph_cap, session_caps); |
745a8e3b YZ |
1122 | list_del(&cap->session_caps); |
1123 | ceph_put_cap(mdsc, cap); | |
2f2dc053 | 1124 | } |
2f2dc053 SW |
1125 | } |
1126 | ||
1c841a96 YZ |
1127 | static void cleanup_session_requests(struct ceph_mds_client *mdsc, |
1128 | struct ceph_mds_session *session) | |
1129 | { | |
1130 | struct ceph_mds_request *req; | |
1131 | struct rb_node *p; | |
1132 | ||
1133 | dout("cleanup_session_requests mds%d\n", session->s_mds); | |
1134 | mutex_lock(&mdsc->mutex); | |
1135 | while (!list_empty(&session->s_unsafe)) { | |
1136 | req = list_first_entry(&session->s_unsafe, | |
1137 | struct ceph_mds_request, r_unsafe_item); | |
3e0708b9 YZ |
1138 | pr_warn_ratelimited(" dropping unsafe request %llu\n", |
1139 | req->r_tid); | |
1c841a96 YZ |
1140 | __unregister_request(mdsc, req); |
1141 | } | |
1142 | /* zero r_attempts, so kick_requests() will re-send requests */ | |
1143 | p = rb_first(&mdsc->request_tree); | |
1144 | while (p) { | |
1145 | req = rb_entry(p, struct ceph_mds_request, r_node); | |
1146 | p = rb_next(p); | |
1147 | if (req->r_session && | |
1148 | req->r_session->s_mds == session->s_mds) | |
1149 | req->r_attempts = 0; | |
1150 | } | |
1151 | mutex_unlock(&mdsc->mutex); | |
1152 | } | |
1153 | ||
2f2dc053 | 1154 | /* |
f818a736 SW |
1155 | * Helper to safely iterate over all caps associated with a session, with |
1156 | * special care taken to handle a racing __ceph_remove_cap(). | |
2f2dc053 | 1157 | * |
f818a736 | 1158 | * Caller must hold session s_mutex. |
2f2dc053 SW |
1159 | */ |
1160 | static int iterate_session_caps(struct ceph_mds_session *session, | |
1161 | int (*cb)(struct inode *, struct ceph_cap *, | |
1162 | void *), void *arg) | |
1163 | { | |
7c1332b8 SW |
1164 | struct list_head *p; |
1165 | struct ceph_cap *cap; | |
1166 | struct inode *inode, *last_inode = NULL; | |
1167 | struct ceph_cap *old_cap = NULL; | |
2f2dc053 SW |
1168 | int ret; |
1169 | ||
1170 | dout("iterate_session_caps %p mds%d\n", session, session->s_mds); | |
1171 | spin_lock(&session->s_cap_lock); | |
7c1332b8 SW |
1172 | p = session->s_caps.next; |
1173 | while (p != &session->s_caps) { | |
1174 | cap = list_entry(p, struct ceph_cap, session_caps); | |
2f2dc053 | 1175 | inode = igrab(&cap->ci->vfs_inode); |
7c1332b8 SW |
1176 | if (!inode) { |
1177 | p = p->next; | |
2f2dc053 | 1178 | continue; |
7c1332b8 SW |
1179 | } |
1180 | session->s_cap_iterator = cap; | |
2f2dc053 | 1181 | spin_unlock(&session->s_cap_lock); |
7c1332b8 SW |
1182 | |
1183 | if (last_inode) { | |
1184 | iput(last_inode); | |
1185 | last_inode = NULL; | |
1186 | } | |
1187 | if (old_cap) { | |
37151668 | 1188 | ceph_put_cap(session->s_mdsc, old_cap); |
7c1332b8 SW |
1189 | old_cap = NULL; |
1190 | } | |
1191 | ||
2f2dc053 | 1192 | ret = cb(inode, cap, arg); |
7c1332b8 SW |
1193 | last_inode = inode; |
1194 | ||
2f2dc053 | 1195 | spin_lock(&session->s_cap_lock); |
7c1332b8 | 1196 | p = p->next; |
d37b1d99 | 1197 | if (!cap->ci) { |
7c1332b8 SW |
1198 | dout("iterate_session_caps finishing cap %p removal\n", |
1199 | cap); | |
1200 | BUG_ON(cap->session != session); | |
745a8e3b | 1201 | cap->session = NULL; |
7c1332b8 SW |
1202 | list_del_init(&cap->session_caps); |
1203 | session->s_nr_caps--; | |
745a8e3b YZ |
1204 | if (cap->queue_release) { |
1205 | list_add_tail(&cap->session_caps, | |
1206 | &session->s_cap_releases); | |
1207 | session->s_num_cap_releases++; | |
1208 | } else { | |
1209 | old_cap = cap; /* put_cap it w/o locks held */ | |
1210 | } | |
7c1332b8 | 1211 | } |
5dacf091 SW |
1212 | if (ret < 0) |
1213 | goto out; | |
2f2dc053 | 1214 | } |
5dacf091 SW |
1215 | ret = 0; |
1216 | out: | |
7c1332b8 | 1217 | session->s_cap_iterator = NULL; |
2f2dc053 | 1218 | spin_unlock(&session->s_cap_lock); |
7c1332b8 | 1219 | |
e96a650a | 1220 | iput(last_inode); |
7c1332b8 | 1221 | if (old_cap) |
37151668 | 1222 | ceph_put_cap(session->s_mdsc, old_cap); |
7c1332b8 | 1223 | |
5dacf091 | 1224 | return ret; |
2f2dc053 SW |
1225 | } |
1226 | ||
1227 | static int remove_session_caps_cb(struct inode *inode, struct ceph_cap *cap, | |
6c99f254 | 1228 | void *arg) |
2f2dc053 | 1229 | { |
6c93df5d | 1230 | struct ceph_fs_client *fsc = (struct ceph_fs_client *)arg; |
2f2dc053 | 1231 | struct ceph_inode_info *ci = ceph_inode(inode); |
553adfd9 | 1232 | LIST_HEAD(to_remove); |
6c93df5d YZ |
1233 | bool drop = false; |
1234 | bool invalidate = false; | |
6c99f254 | 1235 | |
2f2dc053 SW |
1236 | dout("removing cap %p, ci is %p, inode is %p\n", |
1237 | cap, ci, &ci->vfs_inode); | |
be655596 | 1238 | spin_lock(&ci->i_ceph_lock); |
a096b09a | 1239 | __ceph_remove_cap(cap, false); |
571ade33 | 1240 | if (!ci->i_auth_cap) { |
553adfd9 | 1241 | struct ceph_cap_flush *cf; |
6c93df5d | 1242 | struct ceph_mds_client *mdsc = fsc->mdsc; |
6c99f254 | 1243 | |
77310320 YZ |
1244 | ci->i_ceph_flags |= CEPH_I_CAP_DROPPED; |
1245 | ||
6c93df5d | 1246 | if (ci->i_wrbuffer_ref > 0 && |
52953d55 | 1247 | READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) |
6c93df5d YZ |
1248 | invalidate = true; |
1249 | ||
e4500b5e YZ |
1250 | while (!list_empty(&ci->i_cap_flush_list)) { |
1251 | cf = list_first_entry(&ci->i_cap_flush_list, | |
1252 | struct ceph_cap_flush, i_list); | |
8cdcc07d | 1253 | list_move(&cf->i_list, &to_remove); |
553adfd9 YZ |
1254 | } |
1255 | ||
6c99f254 | 1256 | spin_lock(&mdsc->cap_dirty_lock); |
8310b089 | 1257 | |
e4500b5e YZ |
1258 | list_for_each_entry(cf, &to_remove, i_list) |
1259 | list_del(&cf->g_list); | |
8310b089 | 1260 | |
6c99f254 | 1261 | if (!list_empty(&ci->i_dirty_item)) { |
3e0708b9 YZ |
1262 | pr_warn_ratelimited( |
1263 | " dropping dirty %s state for %p %lld\n", | |
6c99f254 SW |
1264 | ceph_cap_string(ci->i_dirty_caps), |
1265 | inode, ceph_ino(inode)); | |
1266 | ci->i_dirty_caps = 0; | |
1267 | list_del_init(&ci->i_dirty_item); | |
6c93df5d | 1268 | drop = true; |
6c99f254 SW |
1269 | } |
1270 | if (!list_empty(&ci->i_flushing_item)) { | |
3e0708b9 YZ |
1271 | pr_warn_ratelimited( |
1272 | " dropping dirty+flushing %s state for %p %lld\n", | |
6c99f254 SW |
1273 | ceph_cap_string(ci->i_flushing_caps), |
1274 | inode, ceph_ino(inode)); | |
1275 | ci->i_flushing_caps = 0; | |
1276 | list_del_init(&ci->i_flushing_item); | |
1277 | mdsc->num_cap_flushing--; | |
6c93df5d | 1278 | drop = true; |
6c99f254 | 1279 | } |
6c99f254 | 1280 | spin_unlock(&mdsc->cap_dirty_lock); |
553adfd9 | 1281 | |
b3f8d68f YZ |
1282 | if (atomic_read(&ci->i_filelock_ref) > 0) { |
1283 | /* make further file lock syscall return -EIO */ | |
1284 | ci->i_ceph_flags |= CEPH_I_ERROR_FILELOCK; | |
1285 | pr_warn_ratelimited(" dropping file locks for %p %lld\n", | |
1286 | inode, ceph_ino(inode)); | |
1287 | } | |
1288 | ||
f66fd9f0 | 1289 | if (!ci->i_dirty_caps && ci->i_prealloc_cap_flush) { |
e4500b5e | 1290 | list_add(&ci->i_prealloc_cap_flush->i_list, &to_remove); |
f66fd9f0 YZ |
1291 | ci->i_prealloc_cap_flush = NULL; |
1292 | } | |
6c99f254 | 1293 | } |
be655596 | 1294 | spin_unlock(&ci->i_ceph_lock); |
553adfd9 YZ |
1295 | while (!list_empty(&to_remove)) { |
1296 | struct ceph_cap_flush *cf; | |
1297 | cf = list_first_entry(&to_remove, | |
e4500b5e YZ |
1298 | struct ceph_cap_flush, i_list); |
1299 | list_del(&cf->i_list); | |
f66fd9f0 | 1300 | ceph_free_cap_flush(cf); |
553adfd9 | 1301 | } |
77310320 YZ |
1302 | |
1303 | wake_up_all(&ci->i_cap_wq); | |
6c93df5d YZ |
1304 | if (invalidate) |
1305 | ceph_queue_invalidate(inode); | |
77310320 | 1306 | if (drop) |
6c99f254 | 1307 | iput(inode); |
2f2dc053 SW |
1308 | return 0; |
1309 | } | |
1310 | ||
1311 | /* | |
1312 | * caller must hold session s_mutex | |
1313 | */ | |
1314 | static void remove_session_caps(struct ceph_mds_session *session) | |
1315 | { | |
6c93df5d YZ |
1316 | struct ceph_fs_client *fsc = session->s_mdsc->fsc; |
1317 | struct super_block *sb = fsc->sb; | |
c8a96a31 JL |
1318 | LIST_HEAD(dispose); |
1319 | ||
2f2dc053 | 1320 | dout("remove_session_caps on %p\n", session); |
6c93df5d | 1321 | iterate_session_caps(session, remove_session_caps_cb, fsc); |
6f60f889 | 1322 | |
c8799fc4 YZ |
1323 | wake_up_all(&fsc->mdsc->cap_flushing_wq); |
1324 | ||
6f60f889 YZ |
1325 | spin_lock(&session->s_cap_lock); |
1326 | if (session->s_nr_caps > 0) { | |
6f60f889 YZ |
1327 | struct inode *inode; |
1328 | struct ceph_cap *cap, *prev = NULL; | |
1329 | struct ceph_vino vino; | |
1330 | /* | |
1331 | * iterate_session_caps() skips inodes that are being | |
1332 | * deleted, we need to wait until deletions are complete. | |
1333 | * __wait_on_freeing_inode() is designed for the job, | |
1334 | * but it is not exported, so use lookup inode function | |
1335 | * to access it. | |
1336 | */ | |
1337 | while (!list_empty(&session->s_caps)) { | |
1338 | cap = list_entry(session->s_caps.next, | |
1339 | struct ceph_cap, session_caps); | |
1340 | if (cap == prev) | |
1341 | break; | |
1342 | prev = cap; | |
1343 | vino = cap->ci->i_vino; | |
1344 | spin_unlock(&session->s_cap_lock); | |
1345 | ||
ed284c49 | 1346 | inode = ceph_find_inode(sb, vino); |
6f60f889 YZ |
1347 | iput(inode); |
1348 | ||
1349 | spin_lock(&session->s_cap_lock); | |
1350 | } | |
1351 | } | |
745a8e3b YZ |
1352 | |
1353 | // drop cap expires and unlock s_cap_lock | |
c8a96a31 | 1354 | detach_cap_releases(session, &dispose); |
6f60f889 | 1355 | |
2f2dc053 | 1356 | BUG_ON(session->s_nr_caps > 0); |
6c99f254 | 1357 | BUG_ON(!list_empty(&session->s_cap_flushing)); |
c8a96a31 JL |
1358 | spin_unlock(&session->s_cap_lock); |
1359 | dispose_cap_releases(session->s_mdsc, &dispose); | |
2f2dc053 SW |
1360 | } |
1361 | ||
1362 | /* | |
1363 | * wake up any threads waiting on this session's caps. if the cap is | |
1364 | * old (didn't get renewed on the client reconnect), remove it now. | |
1365 | * | |
1366 | * caller must hold s_mutex. | |
1367 | */ | |
1368 | static int wake_up_session_cb(struct inode *inode, struct ceph_cap *cap, | |
1369 | void *arg) | |
1370 | { | |
0dc2570f SW |
1371 | struct ceph_inode_info *ci = ceph_inode(inode); |
1372 | ||
0dc2570f | 1373 | if (arg) { |
be655596 | 1374 | spin_lock(&ci->i_ceph_lock); |
0dc2570f SW |
1375 | ci->i_wanted_max_size = 0; |
1376 | ci->i_requested_max_size = 0; | |
be655596 | 1377 | spin_unlock(&ci->i_ceph_lock); |
0dc2570f | 1378 | } |
e5360309 | 1379 | wake_up_all(&ci->i_cap_wq); |
2f2dc053 SW |
1380 | return 0; |
1381 | } | |
1382 | ||
0dc2570f SW |
1383 | static void wake_up_session_caps(struct ceph_mds_session *session, |
1384 | int reconnect) | |
2f2dc053 SW |
1385 | { |
1386 | dout("wake_up_session_caps %p mds%d\n", session, session->s_mds); | |
0dc2570f SW |
1387 | iterate_session_caps(session, wake_up_session_cb, |
1388 | (void *)(unsigned long)reconnect); | |
2f2dc053 SW |
1389 | } |
1390 | ||
1391 | /* | |
1392 | * Send periodic message to MDS renewing all currently held caps. The | |
1393 | * ack will reset the expiration for all caps from this session. | |
1394 | * | |
1395 | * caller holds s_mutex | |
1396 | */ | |
1397 | static int send_renew_caps(struct ceph_mds_client *mdsc, | |
1398 | struct ceph_mds_session *session) | |
1399 | { | |
1400 | struct ceph_msg *msg; | |
1401 | int state; | |
1402 | ||
1403 | if (time_after_eq(jiffies, session->s_cap_ttl) && | |
1404 | time_after_eq(session->s_cap_ttl, session->s_renew_requested)) | |
1405 | pr_info("mds%d caps stale\n", session->s_mds); | |
e4cb4cb8 | 1406 | session->s_renew_requested = jiffies; |
2f2dc053 SW |
1407 | |
1408 | /* do not try to renew caps until a recovering mds has reconnected | |
1409 | * with its clients. */ | |
1410 | state = ceph_mdsmap_get_state(mdsc->mdsmap, session->s_mds); | |
1411 | if (state < CEPH_MDS_STATE_RECONNECT) { | |
1412 | dout("send_renew_caps ignoring mds%d (%s)\n", | |
1413 | session->s_mds, ceph_mds_state_name(state)); | |
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | dout("send_renew_caps to mds%d (%s)\n", session->s_mds, | |
1418 | ceph_mds_state_name(state)); | |
2f2dc053 SW |
1419 | msg = create_session_msg(CEPH_SESSION_REQUEST_RENEWCAPS, |
1420 | ++session->s_renew_seq); | |
a79832f2 SW |
1421 | if (!msg) |
1422 | return -ENOMEM; | |
2f2dc053 SW |
1423 | ceph_con_send(&session->s_con, msg); |
1424 | return 0; | |
1425 | } | |
1426 | ||
186e4f7a YZ |
1427 | static int send_flushmsg_ack(struct ceph_mds_client *mdsc, |
1428 | struct ceph_mds_session *session, u64 seq) | |
1429 | { | |
1430 | struct ceph_msg *msg; | |
1431 | ||
1432 | dout("send_flushmsg_ack to mds%d (%s)s seq %lld\n", | |
a687ecaf | 1433 | session->s_mds, ceph_session_state_name(session->s_state), seq); |
186e4f7a YZ |
1434 | msg = create_session_msg(CEPH_SESSION_FLUSHMSG_ACK, seq); |
1435 | if (!msg) | |
1436 | return -ENOMEM; | |
1437 | ceph_con_send(&session->s_con, msg); | |
1438 | return 0; | |
1439 | } | |
1440 | ||
1441 | ||
2f2dc053 SW |
1442 | /* |
1443 | * Note new cap ttl, and any transition from stale -> not stale (fresh?). | |
0dc2570f SW |
1444 | * |
1445 | * Called under session->s_mutex | |
2f2dc053 SW |
1446 | */ |
1447 | static void renewed_caps(struct ceph_mds_client *mdsc, | |
1448 | struct ceph_mds_session *session, int is_renew) | |
1449 | { | |
1450 | int was_stale; | |
1451 | int wake = 0; | |
1452 | ||
1453 | spin_lock(&session->s_cap_lock); | |
1ce208a6 | 1454 | was_stale = is_renew && time_after_eq(jiffies, session->s_cap_ttl); |
2f2dc053 SW |
1455 | |
1456 | session->s_cap_ttl = session->s_renew_requested + | |
1457 | mdsc->mdsmap->m_session_timeout*HZ; | |
1458 | ||
1459 | if (was_stale) { | |
1460 | if (time_before(jiffies, session->s_cap_ttl)) { | |
1461 | pr_info("mds%d caps renewed\n", session->s_mds); | |
1462 | wake = 1; | |
1463 | } else { | |
1464 | pr_info("mds%d caps still stale\n", session->s_mds); | |
1465 | } | |
1466 | } | |
1467 | dout("renewed_caps mds%d ttl now %lu, was %s, now %s\n", | |
1468 | session->s_mds, session->s_cap_ttl, was_stale ? "stale" : "fresh", | |
1469 | time_before(jiffies, session->s_cap_ttl) ? "stale" : "fresh"); | |
1470 | spin_unlock(&session->s_cap_lock); | |
1471 | ||
1472 | if (wake) | |
0dc2570f | 1473 | wake_up_session_caps(session, 0); |
2f2dc053 SW |
1474 | } |
1475 | ||
1476 | /* | |
1477 | * send a session close request | |
1478 | */ | |
1479 | static int request_close_session(struct ceph_mds_client *mdsc, | |
1480 | struct ceph_mds_session *session) | |
1481 | { | |
1482 | struct ceph_msg *msg; | |
2f2dc053 SW |
1483 | |
1484 | dout("request_close_session mds%d state %s seq %lld\n", | |
a687ecaf | 1485 | session->s_mds, ceph_session_state_name(session->s_state), |
2f2dc053 SW |
1486 | session->s_seq); |
1487 | msg = create_session_msg(CEPH_SESSION_REQUEST_CLOSE, session->s_seq); | |
a79832f2 SW |
1488 | if (!msg) |
1489 | return -ENOMEM; | |
1490 | ceph_con_send(&session->s_con, msg); | |
fcff415c | 1491 | return 1; |
2f2dc053 SW |
1492 | } |
1493 | ||
1494 | /* | |
1495 | * Called with s_mutex held. | |
1496 | */ | |
1497 | static int __close_session(struct ceph_mds_client *mdsc, | |
1498 | struct ceph_mds_session *session) | |
1499 | { | |
1500 | if (session->s_state >= CEPH_MDS_SESSION_CLOSING) | |
1501 | return 0; | |
1502 | session->s_state = CEPH_MDS_SESSION_CLOSING; | |
1503 | return request_close_session(mdsc, session); | |
1504 | } | |
1505 | ||
040d7860 YZ |
1506 | static bool drop_negative_children(struct dentry *dentry) |
1507 | { | |
1508 | struct dentry *child; | |
1509 | bool all_negative = true; | |
1510 | ||
1511 | if (!d_is_dir(dentry)) | |
1512 | goto out; | |
1513 | ||
1514 | spin_lock(&dentry->d_lock); | |
1515 | list_for_each_entry(child, &dentry->d_subdirs, d_child) { | |
1516 | if (d_really_is_positive(child)) { | |
1517 | all_negative = false; | |
1518 | break; | |
1519 | } | |
1520 | } | |
1521 | spin_unlock(&dentry->d_lock); | |
1522 | ||
1523 | if (all_negative) | |
1524 | shrink_dcache_parent(dentry); | |
1525 | out: | |
1526 | return all_negative; | |
1527 | } | |
1528 | ||
2f2dc053 SW |
1529 | /* |
1530 | * Trim old(er) caps. | |
1531 | * | |
1532 | * Because we can't cache an inode without one or more caps, we do | |
1533 | * this indirectly: if a cap is unused, we prune its aliases, at which | |
1534 | * point the inode will hopefully get dropped to. | |
1535 | * | |
1536 | * Yes, this is a bit sloppy. Our only real goal here is to respond to | |
1537 | * memory pressure from the MDS, though, so it needn't be perfect. | |
1538 | */ | |
1539 | static int trim_caps_cb(struct inode *inode, struct ceph_cap *cap, void *arg) | |
1540 | { | |
1541 | struct ceph_mds_session *session = arg; | |
1542 | struct ceph_inode_info *ci = ceph_inode(inode); | |
979abfdd | 1543 | int used, wanted, oissued, mine; |
2f2dc053 SW |
1544 | |
1545 | if (session->s_trim_caps <= 0) | |
1546 | return -1; | |
1547 | ||
be655596 | 1548 | spin_lock(&ci->i_ceph_lock); |
2f2dc053 SW |
1549 | mine = cap->issued | cap->implemented; |
1550 | used = __ceph_caps_used(ci); | |
979abfdd | 1551 | wanted = __ceph_caps_file_wanted(ci); |
2f2dc053 SW |
1552 | oissued = __ceph_caps_issued_other(ci, cap); |
1553 | ||
979abfdd | 1554 | dout("trim_caps_cb %p cap %p mine %s oissued %s used %s wanted %s\n", |
2f2dc053 | 1555 | inode, cap, ceph_cap_string(mine), ceph_cap_string(oissued), |
979abfdd YZ |
1556 | ceph_cap_string(used), ceph_cap_string(wanted)); |
1557 | if (cap == ci->i_auth_cap) { | |
622f3e25 YZ |
1558 | if (ci->i_dirty_caps || ci->i_flushing_caps || |
1559 | !list_empty(&ci->i_cap_snaps)) | |
979abfdd YZ |
1560 | goto out; |
1561 | if ((used | wanted) & CEPH_CAP_ANY_WR) | |
1562 | goto out; | |
89aa5930 YZ |
1563 | /* Note: it's possible that i_filelock_ref becomes non-zero |
1564 | * after dropping auth caps. It doesn't hurt because reply | |
1565 | * of lock mds request will re-add auth caps. */ | |
1566 | if (atomic_read(&ci->i_filelock_ref) > 0) | |
1567 | goto out; | |
979abfdd | 1568 | } |
5e804ac4 YZ |
1569 | /* The inode has cached pages, but it's no longer used. |
1570 | * we can safely drop it */ | |
1571 | if (wanted == 0 && used == CEPH_CAP_FILE_CACHE && | |
1572 | !(oissued & CEPH_CAP_FILE_CACHE)) { | |
1573 | used = 0; | |
1574 | oissued = 0; | |
1575 | } | |
979abfdd | 1576 | if ((used | wanted) & ~oissued & mine) |
2f2dc053 SW |
1577 | goto out; /* we need these caps */ |
1578 | ||
2f2dc053 SW |
1579 | if (oissued) { |
1580 | /* we aren't the only cap.. just remove us */ | |
a096b09a | 1581 | __ceph_remove_cap(cap, true); |
040d7860 | 1582 | session->s_trim_caps--; |
2f2dc053 | 1583 | } else { |
040d7860 | 1584 | struct dentry *dentry; |
5e804ac4 | 1585 | /* try dropping referring dentries */ |
be655596 | 1586 | spin_unlock(&ci->i_ceph_lock); |
040d7860 YZ |
1587 | dentry = d_find_any_alias(inode); |
1588 | if (dentry && drop_negative_children(dentry)) { | |
1589 | int count; | |
1590 | dput(dentry); | |
1591 | d_prune_aliases(inode); | |
1592 | count = atomic_read(&inode->i_count); | |
1593 | if (count == 1) | |
1594 | session->s_trim_caps--; | |
1595 | dout("trim_caps_cb %p cap %p pruned, count now %d\n", | |
1596 | inode, cap, count); | |
1597 | } else { | |
1598 | dput(dentry); | |
1599 | } | |
2f2dc053 SW |
1600 | return 0; |
1601 | } | |
1602 | ||
1603 | out: | |
be655596 | 1604 | spin_unlock(&ci->i_ceph_lock); |
2f2dc053 SW |
1605 | return 0; |
1606 | } | |
1607 | ||
1608 | /* | |
1609 | * Trim session cap count down to some max number. | |
1610 | */ | |
e30ee581 ZZ |
1611 | int ceph_trim_caps(struct ceph_mds_client *mdsc, |
1612 | struct ceph_mds_session *session, | |
1613 | int max_caps) | |
2f2dc053 SW |
1614 | { |
1615 | int trim_caps = session->s_nr_caps - max_caps; | |
1616 | ||
1617 | dout("trim_caps mds%d start: %d / %d, trim %d\n", | |
1618 | session->s_mds, session->s_nr_caps, max_caps, trim_caps); | |
1619 | if (trim_caps > 0) { | |
1620 | session->s_trim_caps = trim_caps; | |
1621 | iterate_session_caps(session, trim_caps_cb, session); | |
1622 | dout("trim_caps mds%d done: %d / %d, trimmed %d\n", | |
1623 | session->s_mds, session->s_nr_caps, max_caps, | |
1624 | trim_caps - session->s_trim_caps); | |
5dacf091 | 1625 | session->s_trim_caps = 0; |
2f2dc053 | 1626 | } |
a56371d9 | 1627 | |
a56371d9 | 1628 | ceph_send_cap_releases(mdsc, session); |
2f2dc053 SW |
1629 | return 0; |
1630 | } | |
1631 | ||
8310b089 YZ |
1632 | static int check_caps_flush(struct ceph_mds_client *mdsc, |
1633 | u64 want_flush_tid) | |
1634 | { | |
8310b089 YZ |
1635 | int ret = 1; |
1636 | ||
1637 | spin_lock(&mdsc->cap_dirty_lock); | |
e4500b5e YZ |
1638 | if (!list_empty(&mdsc->cap_flush_list)) { |
1639 | struct ceph_cap_flush *cf = | |
1640 | list_first_entry(&mdsc->cap_flush_list, | |
1641 | struct ceph_cap_flush, g_list); | |
1642 | if (cf->tid <= want_flush_tid) { | |
1643 | dout("check_caps_flush still flushing tid " | |
1644 | "%llu <= %llu\n", cf->tid, want_flush_tid); | |
1645 | ret = 0; | |
1646 | } | |
8310b089 YZ |
1647 | } |
1648 | spin_unlock(&mdsc->cap_dirty_lock); | |
1649 | return ret; | |
d3383a8e YZ |
1650 | } |
1651 | ||
2f2dc053 SW |
1652 | /* |
1653 | * flush all dirty inode data to disk. | |
1654 | * | |
8310b089 | 1655 | * returns true if we've flushed through want_flush_tid |
2f2dc053 | 1656 | */ |
affbc19a | 1657 | static void wait_caps_flush(struct ceph_mds_client *mdsc, |
0e294387 | 1658 | u64 want_flush_tid) |
2f2dc053 | 1659 | { |
0e294387 | 1660 | dout("check_caps_flush want %llu\n", want_flush_tid); |
8310b089 YZ |
1661 | |
1662 | wait_event(mdsc->cap_flushing_wq, | |
1663 | check_caps_flush(mdsc, want_flush_tid)); | |
1664 | ||
1665 | dout("check_caps_flush ok, flushed thru %llu\n", want_flush_tid); | |
2f2dc053 SW |
1666 | } |
1667 | ||
1668 | /* | |
1669 | * called under s_mutex | |
1670 | */ | |
3d7ded4d SW |
1671 | void ceph_send_cap_releases(struct ceph_mds_client *mdsc, |
1672 | struct ceph_mds_session *session) | |
2f2dc053 | 1673 | { |
745a8e3b YZ |
1674 | struct ceph_msg *msg = NULL; |
1675 | struct ceph_mds_cap_release *head; | |
1676 | struct ceph_mds_cap_item *item; | |
92475f05 | 1677 | struct ceph_osd_client *osdc = &mdsc->fsc->client->osdc; |
745a8e3b YZ |
1678 | struct ceph_cap *cap; |
1679 | LIST_HEAD(tmp_list); | |
1680 | int num_cap_releases; | |
92475f05 JL |
1681 | __le32 barrier, *cap_barrier; |
1682 | ||
1683 | down_read(&osdc->lock); | |
1684 | barrier = cpu_to_le32(osdc->epoch_barrier); | |
1685 | up_read(&osdc->lock); | |
2f2dc053 | 1686 | |
0f8605f2 | 1687 | spin_lock(&session->s_cap_lock); |
745a8e3b YZ |
1688 | again: |
1689 | list_splice_init(&session->s_cap_releases, &tmp_list); | |
1690 | num_cap_releases = session->s_num_cap_releases; | |
1691 | session->s_num_cap_releases = 0; | |
2f2dc053 | 1692 | spin_unlock(&session->s_cap_lock); |
e01a5946 | 1693 | |
745a8e3b YZ |
1694 | while (!list_empty(&tmp_list)) { |
1695 | if (!msg) { | |
1696 | msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPRELEASE, | |
09cbfeaf | 1697 | PAGE_SIZE, GFP_NOFS, false); |
745a8e3b YZ |
1698 | if (!msg) |
1699 | goto out_err; | |
1700 | head = msg->front.iov_base; | |
1701 | head->num = cpu_to_le32(0); | |
1702 | msg->front.iov_len = sizeof(*head); | |
92475f05 JL |
1703 | |
1704 | msg->hdr.version = cpu_to_le16(2); | |
1705 | msg->hdr.compat_version = cpu_to_le16(1); | |
745a8e3b | 1706 | } |
92475f05 | 1707 | |
745a8e3b YZ |
1708 | cap = list_first_entry(&tmp_list, struct ceph_cap, |
1709 | session_caps); | |
1710 | list_del(&cap->session_caps); | |
1711 | num_cap_releases--; | |
e01a5946 | 1712 | |
00bd8edb | 1713 | head = msg->front.iov_base; |
745a8e3b YZ |
1714 | le32_add_cpu(&head->num, 1); |
1715 | item = msg->front.iov_base + msg->front.iov_len; | |
1716 | item->ino = cpu_to_le64(cap->cap_ino); | |
1717 | item->cap_id = cpu_to_le64(cap->cap_id); | |
1718 | item->migrate_seq = cpu_to_le32(cap->mseq); | |
1719 | item->seq = cpu_to_le32(cap->issue_seq); | |
1720 | msg->front.iov_len += sizeof(*item); | |
1721 | ||
1722 | ceph_put_cap(mdsc, cap); | |
1723 | ||
1724 | if (le32_to_cpu(head->num) == CEPH_CAPS_PER_RELEASE) { | |
92475f05 JL |
1725 | // Append cap_barrier field |
1726 | cap_barrier = msg->front.iov_base + msg->front.iov_len; | |
1727 | *cap_barrier = barrier; | |
1728 | msg->front.iov_len += sizeof(*cap_barrier); | |
1729 | ||
745a8e3b YZ |
1730 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); |
1731 | dout("send_cap_releases mds%d %p\n", session->s_mds, msg); | |
1732 | ceph_con_send(&session->s_con, msg); | |
1733 | msg = NULL; | |
1734 | } | |
00bd8edb | 1735 | } |
e01a5946 | 1736 | |
745a8e3b | 1737 | BUG_ON(num_cap_releases != 0); |
e01a5946 | 1738 | |
745a8e3b YZ |
1739 | spin_lock(&session->s_cap_lock); |
1740 | if (!list_empty(&session->s_cap_releases)) | |
1741 | goto again; | |
1742 | spin_unlock(&session->s_cap_lock); | |
1743 | ||
1744 | if (msg) { | |
92475f05 JL |
1745 | // Append cap_barrier field |
1746 | cap_barrier = msg->front.iov_base + msg->front.iov_len; | |
1747 | *cap_barrier = barrier; | |
1748 | msg->front.iov_len += sizeof(*cap_barrier); | |
1749 | ||
745a8e3b YZ |
1750 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); |
1751 | dout("send_cap_releases mds%d %p\n", session->s_mds, msg); | |
1752 | ceph_con_send(&session->s_con, msg); | |
e01a5946 | 1753 | } |
745a8e3b YZ |
1754 | return; |
1755 | out_err: | |
1756 | pr_err("send_cap_releases mds%d, failed to allocate message\n", | |
1757 | session->s_mds); | |
1758 | spin_lock(&session->s_cap_lock); | |
1759 | list_splice(&tmp_list, &session->s_cap_releases); | |
1760 | session->s_num_cap_releases += num_cap_releases; | |
1761 | spin_unlock(&session->s_cap_lock); | |
e01a5946 SW |
1762 | } |
1763 | ||
2f2dc053 SW |
1764 | /* |
1765 | * requests | |
1766 | */ | |
1767 | ||
54008399 YZ |
1768 | int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req, |
1769 | struct inode *dir) | |
1770 | { | |
1771 | struct ceph_inode_info *ci = ceph_inode(dir); | |
1772 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; | |
1773 | struct ceph_mount_options *opt = req->r_mdsc->fsc->mount_options; | |
2a5beea3 | 1774 | size_t size = sizeof(struct ceph_mds_reply_dir_entry); |
54008399 YZ |
1775 | int order, num_entries; |
1776 | ||
1777 | spin_lock(&ci->i_ceph_lock); | |
1778 | num_entries = ci->i_files + ci->i_subdirs; | |
1779 | spin_unlock(&ci->i_ceph_lock); | |
1780 | num_entries = max(num_entries, 1); | |
1781 | num_entries = min(num_entries, opt->max_readdir); | |
1782 | ||
1783 | order = get_order(size * num_entries); | |
1784 | while (order >= 0) { | |
2a5beea3 YZ |
1785 | rinfo->dir_entries = (void*)__get_free_pages(GFP_KERNEL | |
1786 | __GFP_NOWARN, | |
1787 | order); | |
1788 | if (rinfo->dir_entries) | |
54008399 YZ |
1789 | break; |
1790 | order--; | |
1791 | } | |
2a5beea3 | 1792 | if (!rinfo->dir_entries) |
54008399 YZ |
1793 | return -ENOMEM; |
1794 | ||
1795 | num_entries = (PAGE_SIZE << order) / size; | |
1796 | num_entries = min(num_entries, opt->max_readdir); | |
1797 | ||
1798 | rinfo->dir_buf_size = PAGE_SIZE << order; | |
1799 | req->r_num_caps = num_entries + 1; | |
1800 | req->r_args.readdir.max_entries = cpu_to_le32(num_entries); | |
1801 | req->r_args.readdir.max_bytes = cpu_to_le32(opt->max_readdir_bytes); | |
1802 | return 0; | |
1803 | } | |
1804 | ||
2f2dc053 SW |
1805 | /* |
1806 | * Create an mds request. | |
1807 | */ | |
1808 | struct ceph_mds_request * | |
1809 | ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode) | |
1810 | { | |
1811 | struct ceph_mds_request *req = kzalloc(sizeof(*req), GFP_NOFS); | |
63ecae7e | 1812 | struct timespec64 ts; |
2f2dc053 SW |
1813 | |
1814 | if (!req) | |
1815 | return ERR_PTR(-ENOMEM); | |
1816 | ||
b4556396 | 1817 | mutex_init(&req->r_fill_mutex); |
37151668 | 1818 | req->r_mdsc = mdsc; |
2f2dc053 SW |
1819 | req->r_started = jiffies; |
1820 | req->r_resend_mds = -1; | |
1821 | INIT_LIST_HEAD(&req->r_unsafe_dir_item); | |
68cd5b4b | 1822 | INIT_LIST_HEAD(&req->r_unsafe_target_item); |
2f2dc053 | 1823 | req->r_fmode = -1; |
153c8e6b | 1824 | kref_init(&req->r_kref); |
fcd00b68 | 1825 | RB_CLEAR_NODE(&req->r_node); |
2f2dc053 SW |
1826 | INIT_LIST_HEAD(&req->r_wait); |
1827 | init_completion(&req->r_completion); | |
1828 | init_completion(&req->r_safe_completion); | |
1829 | INIT_LIST_HEAD(&req->r_unsafe_item); | |
1830 | ||
63ecae7e | 1831 | ktime_get_coarse_real_ts64(&ts); |
0ed1e90a | 1832 | req->r_stamp = timespec64_trunc(ts, mdsc->fsc->sb->s_time_gran); |
b8e69066 | 1833 | |
2f2dc053 SW |
1834 | req->r_op = op; |
1835 | req->r_direct_mode = mode; | |
1836 | return req; | |
1837 | } | |
1838 | ||
1839 | /* | |
44ca18f2 | 1840 | * return oldest (lowest) request, tid in request tree, 0 if none. |
2f2dc053 SW |
1841 | * |
1842 | * called under mdsc->mutex. | |
1843 | */ | |
44ca18f2 SW |
1844 | static struct ceph_mds_request *__get_oldest_req(struct ceph_mds_client *mdsc) |
1845 | { | |
1846 | if (RB_EMPTY_ROOT(&mdsc->request_tree)) | |
1847 | return NULL; | |
1848 | return rb_entry(rb_first(&mdsc->request_tree), | |
1849 | struct ceph_mds_request, r_node); | |
1850 | } | |
1851 | ||
e8a7b8b1 | 1852 | static inline u64 __get_oldest_tid(struct ceph_mds_client *mdsc) |
2f2dc053 | 1853 | { |
e8a7b8b1 | 1854 | return mdsc->oldest_tid; |
2f2dc053 SW |
1855 | } |
1856 | ||
1857 | /* | |
1858 | * Build a dentry's path. Allocate on heap; caller must kfree. Based | |
1859 | * on build_path_from_dentry in fs/cifs/dir.c. | |
1860 | * | |
1861 | * If @stop_on_nosnap, generate path relative to the first non-snapped | |
1862 | * inode. | |
1863 | * | |
1864 | * Encode hidden .snap dirs as a double /, i.e. | |
1865 | * foo/.snap/bar -> foo//bar | |
1866 | */ | |
1867 | char *ceph_mdsc_build_path(struct dentry *dentry, int *plen, u64 *base, | |
1868 | int stop_on_nosnap) | |
1869 | { | |
1870 | struct dentry *temp; | |
1871 | char *path; | |
1872 | int len, pos; | |
1b71fe2e | 1873 | unsigned seq; |
2f2dc053 | 1874 | |
d37b1d99 | 1875 | if (!dentry) |
2f2dc053 SW |
1876 | return ERR_PTR(-EINVAL); |
1877 | ||
1878 | retry: | |
1879 | len = 0; | |
1b71fe2e AV |
1880 | seq = read_seqbegin(&rename_lock); |
1881 | rcu_read_lock(); | |
2f2dc053 | 1882 | for (temp = dentry; !IS_ROOT(temp);) { |
2b0143b5 | 1883 | struct inode *inode = d_inode(temp); |
2f2dc053 SW |
1884 | if (inode && ceph_snap(inode) == CEPH_SNAPDIR) |
1885 | len++; /* slash only */ | |
1886 | else if (stop_on_nosnap && inode && | |
1887 | ceph_snap(inode) == CEPH_NOSNAP) | |
1888 | break; | |
1889 | else | |
1890 | len += 1 + temp->d_name.len; | |
1891 | temp = temp->d_parent; | |
2f2dc053 | 1892 | } |
1b71fe2e | 1893 | rcu_read_unlock(); |
2f2dc053 SW |
1894 | if (len) |
1895 | len--; /* no leading '/' */ | |
1896 | ||
1897 | path = kmalloc(len+1, GFP_NOFS); | |
d37b1d99 | 1898 | if (!path) |
2f2dc053 SW |
1899 | return ERR_PTR(-ENOMEM); |
1900 | pos = len; | |
1901 | path[pos] = 0; /* trailing null */ | |
1b71fe2e | 1902 | rcu_read_lock(); |
2f2dc053 | 1903 | for (temp = dentry; !IS_ROOT(temp) && pos != 0; ) { |
1b71fe2e | 1904 | struct inode *inode; |
2f2dc053 | 1905 | |
1b71fe2e | 1906 | spin_lock(&temp->d_lock); |
2b0143b5 | 1907 | inode = d_inode(temp); |
2f2dc053 | 1908 | if (inode && ceph_snap(inode) == CEPH_SNAPDIR) { |
104648ad | 1909 | dout("build_path path+%d: %p SNAPDIR\n", |
2f2dc053 SW |
1910 | pos, temp); |
1911 | } else if (stop_on_nosnap && inode && | |
1912 | ceph_snap(inode) == CEPH_NOSNAP) { | |
9d5a09e6 | 1913 | spin_unlock(&temp->d_lock); |
2f2dc053 SW |
1914 | break; |
1915 | } else { | |
1916 | pos -= temp->d_name.len; | |
1b71fe2e AV |
1917 | if (pos < 0) { |
1918 | spin_unlock(&temp->d_lock); | |
2f2dc053 | 1919 | break; |
1b71fe2e | 1920 | } |
2f2dc053 SW |
1921 | strncpy(path + pos, temp->d_name.name, |
1922 | temp->d_name.len); | |
2f2dc053 | 1923 | } |
1b71fe2e | 1924 | spin_unlock(&temp->d_lock); |
2f2dc053 SW |
1925 | if (pos) |
1926 | path[--pos] = '/'; | |
1927 | temp = temp->d_parent; | |
2f2dc053 | 1928 | } |
1b71fe2e AV |
1929 | rcu_read_unlock(); |
1930 | if (pos != 0 || read_seqretry(&rename_lock, seq)) { | |
104648ad | 1931 | pr_err("build_path did not end path lookup where " |
2f2dc053 SW |
1932 | "expected, namelen is %d, pos is %d\n", len, pos); |
1933 | /* presumably this is only possible if racing with a | |
1934 | rename of one of the parent directories (we can not | |
1935 | lock the dentries above us to prevent this, but | |
1936 | retrying should be harmless) */ | |
1937 | kfree(path); | |
1938 | goto retry; | |
1939 | } | |
1940 | ||
2b0143b5 | 1941 | *base = ceph_ino(d_inode(temp)); |
2f2dc053 | 1942 | *plen = len; |
104648ad | 1943 | dout("build_path on %p %d built %llx '%.*s'\n", |
84d08fa8 | 1944 | dentry, d_count(dentry), *base, len, path); |
2f2dc053 SW |
1945 | return path; |
1946 | } | |
1947 | ||
fd36a717 | 1948 | static int build_dentry_path(struct dentry *dentry, struct inode *dir, |
2f2dc053 SW |
1949 | const char **ppath, int *ppathlen, u64 *pino, |
1950 | int *pfreepath) | |
1951 | { | |
1952 | char *path; | |
1953 | ||
c6b0b656 | 1954 | rcu_read_lock(); |
fd36a717 JL |
1955 | if (!dir) |
1956 | dir = d_inode_rcu(dentry->d_parent); | |
c6b0b656 JL |
1957 | if (dir && ceph_snap(dir) == CEPH_NOSNAP) { |
1958 | *pino = ceph_ino(dir); | |
1959 | rcu_read_unlock(); | |
2f2dc053 SW |
1960 | *ppath = dentry->d_name.name; |
1961 | *ppathlen = dentry->d_name.len; | |
1962 | return 0; | |
1963 | } | |
c6b0b656 | 1964 | rcu_read_unlock(); |
2f2dc053 SW |
1965 | path = ceph_mdsc_build_path(dentry, ppathlen, pino, 1); |
1966 | if (IS_ERR(path)) | |
1967 | return PTR_ERR(path); | |
1968 | *ppath = path; | |
1969 | *pfreepath = 1; | |
1970 | return 0; | |
1971 | } | |
1972 | ||
1973 | static int build_inode_path(struct inode *inode, | |
1974 | const char **ppath, int *ppathlen, u64 *pino, | |
1975 | int *pfreepath) | |
1976 | { | |
1977 | struct dentry *dentry; | |
1978 | char *path; | |
1979 | ||
1980 | if (ceph_snap(inode) == CEPH_NOSNAP) { | |
1981 | *pino = ceph_ino(inode); | |
1982 | *ppathlen = 0; | |
1983 | return 0; | |
1984 | } | |
1985 | dentry = d_find_alias(inode); | |
1986 | path = ceph_mdsc_build_path(dentry, ppathlen, pino, 1); | |
1987 | dput(dentry); | |
1988 | if (IS_ERR(path)) | |
1989 | return PTR_ERR(path); | |
1990 | *ppath = path; | |
1991 | *pfreepath = 1; | |
1992 | return 0; | |
1993 | } | |
1994 | ||
1995 | /* | |
1996 | * request arguments may be specified via an inode *, a dentry *, or | |
1997 | * an explicit ino+path. | |
1998 | */ | |
1999 | static int set_request_path_attr(struct inode *rinode, struct dentry *rdentry, | |
fd36a717 JL |
2000 | struct inode *rdiri, const char *rpath, |
2001 | u64 rino, const char **ppath, int *pathlen, | |
2f2dc053 SW |
2002 | u64 *ino, int *freepath) |
2003 | { | |
2004 | int r = 0; | |
2005 | ||
2006 | if (rinode) { | |
2007 | r = build_inode_path(rinode, ppath, pathlen, ino, freepath); | |
2008 | dout(" inode %p %llx.%llx\n", rinode, ceph_ino(rinode), | |
2009 | ceph_snap(rinode)); | |
2010 | } else if (rdentry) { | |
fd36a717 JL |
2011 | r = build_dentry_path(rdentry, rdiri, ppath, pathlen, ino, |
2012 | freepath); | |
2f2dc053 SW |
2013 | dout(" dentry %p %llx/%.*s\n", rdentry, *ino, *pathlen, |
2014 | *ppath); | |
795858db | 2015 | } else if (rpath || rino) { |
2f2dc053 SW |
2016 | *ino = rino; |
2017 | *ppath = rpath; | |
b000056a | 2018 | *pathlen = rpath ? strlen(rpath) : 0; |
2f2dc053 SW |
2019 | dout(" path %.*s\n", *pathlen, rpath); |
2020 | } | |
2021 | ||
2022 | return r; | |
2023 | } | |
2024 | ||
2025 | /* | |
2026 | * called under mdsc->mutex | |
2027 | */ | |
2028 | static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc, | |
2029 | struct ceph_mds_request *req, | |
6e6f0923 | 2030 | int mds, bool drop_cap_releases) |
2f2dc053 SW |
2031 | { |
2032 | struct ceph_msg *msg; | |
2033 | struct ceph_mds_request_head *head; | |
2034 | const char *path1 = NULL; | |
2035 | const char *path2 = NULL; | |
2036 | u64 ino1 = 0, ino2 = 0; | |
2037 | int pathlen1 = 0, pathlen2 = 0; | |
2038 | int freepath1 = 0, freepath2 = 0; | |
2039 | int len; | |
2040 | u16 releases; | |
2041 | void *p, *end; | |
2042 | int ret; | |
2043 | ||
2044 | ret = set_request_path_attr(req->r_inode, req->r_dentry, | |
3dd69aab | 2045 | req->r_parent, req->r_path1, req->r_ino1.ino, |
2f2dc053 SW |
2046 | &path1, &pathlen1, &ino1, &freepath1); |
2047 | if (ret < 0) { | |
2048 | msg = ERR_PTR(ret); | |
2049 | goto out; | |
2050 | } | |
2051 | ||
2052 | ret = set_request_path_attr(NULL, req->r_old_dentry, | |
fd36a717 | 2053 | req->r_old_dentry_dir, |
2f2dc053 SW |
2054 | req->r_path2, req->r_ino2.ino, |
2055 | &path2, &pathlen2, &ino2, &freepath2); | |
2056 | if (ret < 0) { | |
2057 | msg = ERR_PTR(ret); | |
2058 | goto out_free1; | |
2059 | } | |
2060 | ||
2061 | len = sizeof(*head) + | |
b8e69066 | 2062 | pathlen1 + pathlen2 + 2*(1 + sizeof(u32) + sizeof(u64)) + |
777d738a | 2063 | sizeof(struct ceph_timespec); |
2f2dc053 SW |
2064 | |
2065 | /* calculate (max) length for cap releases */ | |
2066 | len += sizeof(struct ceph_mds_request_release) * | |
2067 | (!!req->r_inode_drop + !!req->r_dentry_drop + | |
2068 | !!req->r_old_inode_drop + !!req->r_old_dentry_drop); | |
2069 | if (req->r_dentry_drop) | |
2070 | len += req->r_dentry->d_name.len; | |
2071 | if (req->r_old_dentry_drop) | |
2072 | len += req->r_old_dentry->d_name.len; | |
2073 | ||
b61c2763 | 2074 | msg = ceph_msg_new(CEPH_MSG_CLIENT_REQUEST, len, GFP_NOFS, false); |
a79832f2 SW |
2075 | if (!msg) { |
2076 | msg = ERR_PTR(-ENOMEM); | |
2f2dc053 | 2077 | goto out_free2; |
a79832f2 | 2078 | } |
2f2dc053 | 2079 | |
7cfa0313 | 2080 | msg->hdr.version = cpu_to_le16(2); |
6df058c0 SW |
2081 | msg->hdr.tid = cpu_to_le64(req->r_tid); |
2082 | ||
2f2dc053 SW |
2083 | head = msg->front.iov_base; |
2084 | p = msg->front.iov_base + sizeof(*head); | |
2085 | end = msg->front.iov_base + msg->front.iov_len; | |
2086 | ||
2087 | head->mdsmap_epoch = cpu_to_le32(mdsc->mdsmap->m_epoch); | |
2088 | head->op = cpu_to_le32(req->r_op); | |
ff3d0046 EB |
2089 | head->caller_uid = cpu_to_le32(from_kuid(&init_user_ns, req->r_uid)); |
2090 | head->caller_gid = cpu_to_le32(from_kgid(&init_user_ns, req->r_gid)); | |
2f2dc053 SW |
2091 | head->args = req->r_args; |
2092 | ||
2093 | ceph_encode_filepath(&p, end, ino1, path1); | |
2094 | ceph_encode_filepath(&p, end, ino2, path2); | |
2095 | ||
e979cf50 SW |
2096 | /* make note of release offset, in case we need to replay */ |
2097 | req->r_request_release_offset = p - msg->front.iov_base; | |
2098 | ||
2f2dc053 SW |
2099 | /* cap releases */ |
2100 | releases = 0; | |
2101 | if (req->r_inode_drop) | |
2102 | releases += ceph_encode_inode_release(&p, | |
2b0143b5 | 2103 | req->r_inode ? req->r_inode : d_inode(req->r_dentry), |
2f2dc053 SW |
2104 | mds, req->r_inode_drop, req->r_inode_unless, 0); |
2105 | if (req->r_dentry_drop) | |
2106 | releases += ceph_encode_dentry_release(&p, req->r_dentry, | |
3dd69aab | 2107 | req->r_parent, mds, req->r_dentry_drop, |
ca6c8ae0 | 2108 | req->r_dentry_unless); |
2f2dc053 SW |
2109 | if (req->r_old_dentry_drop) |
2110 | releases += ceph_encode_dentry_release(&p, req->r_old_dentry, | |
ca6c8ae0 JL |
2111 | req->r_old_dentry_dir, mds, |
2112 | req->r_old_dentry_drop, | |
2113 | req->r_old_dentry_unless); | |
2f2dc053 SW |
2114 | if (req->r_old_inode_drop) |
2115 | releases += ceph_encode_inode_release(&p, | |
2b0143b5 | 2116 | d_inode(req->r_old_dentry), |
2f2dc053 | 2117 | mds, req->r_old_inode_drop, req->r_old_inode_unless, 0); |
6e6f0923 YZ |
2118 | |
2119 | if (drop_cap_releases) { | |
2120 | releases = 0; | |
2121 | p = msg->front.iov_base + req->r_request_release_offset; | |
2122 | } | |
2123 | ||
2f2dc053 SW |
2124 | head->num_releases = cpu_to_le16(releases); |
2125 | ||
b8e69066 | 2126 | /* time stamp */ |
1f041a89 YZ |
2127 | { |
2128 | struct ceph_timespec ts; | |
0ed1e90a | 2129 | ceph_encode_timespec64(&ts, &req->r_stamp); |
1f041a89 YZ |
2130 | ceph_encode_copy(&p, &ts, sizeof(ts)); |
2131 | } | |
b8e69066 | 2132 | |
2f2dc053 SW |
2133 | BUG_ON(p > end); |
2134 | msg->front.iov_len = p - msg->front.iov_base; | |
2135 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
2136 | ||
25e6bae3 YZ |
2137 | if (req->r_pagelist) { |
2138 | struct ceph_pagelist *pagelist = req->r_pagelist; | |
0e1a5ee6 | 2139 | refcount_inc(&pagelist->refcnt); |
25e6bae3 YZ |
2140 | ceph_msg_data_add_pagelist(msg, pagelist); |
2141 | msg->hdr.data_len = cpu_to_le32(pagelist->length); | |
2142 | } else { | |
2143 | msg->hdr.data_len = 0; | |
ebf18f47 | 2144 | } |
02afca6c | 2145 | |
2f2dc053 SW |
2146 | msg->hdr.data_off = cpu_to_le16(0); |
2147 | ||
2148 | out_free2: | |
2149 | if (freepath2) | |
2150 | kfree((char *)path2); | |
2151 | out_free1: | |
2152 | if (freepath1) | |
2153 | kfree((char *)path1); | |
2154 | out: | |
2155 | return msg; | |
2156 | } | |
2157 | ||
2158 | /* | |
2159 | * called under mdsc->mutex if error, under no mutex if | |
2160 | * success. | |
2161 | */ | |
2162 | static void complete_request(struct ceph_mds_client *mdsc, | |
2163 | struct ceph_mds_request *req) | |
2164 | { | |
2165 | if (req->r_callback) | |
2166 | req->r_callback(mdsc, req); | |
2167 | else | |
03066f23 | 2168 | complete_all(&req->r_completion); |
2f2dc053 SW |
2169 | } |
2170 | ||
2171 | /* | |
2172 | * called under mdsc->mutex | |
2173 | */ | |
2174 | static int __prepare_send_request(struct ceph_mds_client *mdsc, | |
2175 | struct ceph_mds_request *req, | |
6e6f0923 | 2176 | int mds, bool drop_cap_releases) |
2f2dc053 SW |
2177 | { |
2178 | struct ceph_mds_request_head *rhead; | |
2179 | struct ceph_msg *msg; | |
2180 | int flags = 0; | |
2181 | ||
2f2dc053 | 2182 | req->r_attempts++; |
e55b71f8 GF |
2183 | if (req->r_inode) { |
2184 | struct ceph_cap *cap = | |
2185 | ceph_get_cap_for_mds(ceph_inode(req->r_inode), mds); | |
2186 | ||
2187 | if (cap) | |
2188 | req->r_sent_on_mseq = cap->mseq; | |
2189 | else | |
2190 | req->r_sent_on_mseq = -1; | |
2191 | } | |
2f2dc053 SW |
2192 | dout("prepare_send_request %p tid %lld %s (attempt %d)\n", req, |
2193 | req->r_tid, ceph_mds_op_name(req->r_op), req->r_attempts); | |
2194 | ||
bc2de10d | 2195 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { |
c5c9a0bf | 2196 | void *p; |
01a92f17 SW |
2197 | /* |
2198 | * Replay. Do not regenerate message (and rebuild | |
2199 | * paths, etc.); just use the original message. | |
2200 | * Rebuilding paths will break for renames because | |
2201 | * d_move mangles the src name. | |
2202 | */ | |
2203 | msg = req->r_request; | |
2204 | rhead = msg->front.iov_base; | |
2205 | ||
2206 | flags = le32_to_cpu(rhead->flags); | |
2207 | flags |= CEPH_MDS_FLAG_REPLAY; | |
2208 | rhead->flags = cpu_to_le32(flags); | |
2209 | ||
2210 | if (req->r_target_inode) | |
2211 | rhead->ino = cpu_to_le64(ceph_ino(req->r_target_inode)); | |
2212 | ||
2213 | rhead->num_retry = req->r_attempts - 1; | |
e979cf50 SW |
2214 | |
2215 | /* remove cap/dentry releases from message */ | |
2216 | rhead->num_releases = 0; | |
c5c9a0bf YZ |
2217 | |
2218 | /* time stamp */ | |
2219 | p = msg->front.iov_base + req->r_request_release_offset; | |
1f041a89 YZ |
2220 | { |
2221 | struct ceph_timespec ts; | |
0ed1e90a | 2222 | ceph_encode_timespec64(&ts, &req->r_stamp); |
1f041a89 YZ |
2223 | ceph_encode_copy(&p, &ts, sizeof(ts)); |
2224 | } | |
c5c9a0bf YZ |
2225 | |
2226 | msg->front.iov_len = p - msg->front.iov_base; | |
2227 | msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); | |
01a92f17 SW |
2228 | return 0; |
2229 | } | |
2230 | ||
2f2dc053 SW |
2231 | if (req->r_request) { |
2232 | ceph_msg_put(req->r_request); | |
2233 | req->r_request = NULL; | |
2234 | } | |
6e6f0923 | 2235 | msg = create_request_message(mdsc, req, mds, drop_cap_releases); |
2f2dc053 | 2236 | if (IS_ERR(msg)) { |
e1518c7c | 2237 | req->r_err = PTR_ERR(msg); |
a79832f2 | 2238 | return PTR_ERR(msg); |
2f2dc053 SW |
2239 | } |
2240 | req->r_request = msg; | |
2241 | ||
2242 | rhead = msg->front.iov_base; | |
2f2dc053 | 2243 | rhead->oldest_client_tid = cpu_to_le64(__get_oldest_tid(mdsc)); |
bc2de10d | 2244 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) |
2f2dc053 | 2245 | flags |= CEPH_MDS_FLAG_REPLAY; |
3dd69aab | 2246 | if (req->r_parent) |
2f2dc053 SW |
2247 | flags |= CEPH_MDS_FLAG_WANT_DENTRY; |
2248 | rhead->flags = cpu_to_le32(flags); | |
2249 | rhead->num_fwd = req->r_num_fwd; | |
2250 | rhead->num_retry = req->r_attempts - 1; | |
01a92f17 | 2251 | rhead->ino = 0; |
2f2dc053 | 2252 | |
3dd69aab | 2253 | dout(" r_parent = %p\n", req->r_parent); |
2f2dc053 SW |
2254 | return 0; |
2255 | } | |
2256 | ||
2257 | /* | |
2258 | * send request, or put it on the appropriate wait list. | |
2259 | */ | |
d5548492 | 2260 | static void __do_request(struct ceph_mds_client *mdsc, |
2f2dc053 SW |
2261 | struct ceph_mds_request *req) |
2262 | { | |
2263 | struct ceph_mds_session *session = NULL; | |
2264 | int mds = -1; | |
48fec5d0 | 2265 | int err = 0; |
2f2dc053 | 2266 | |
bc2de10d JL |
2267 | if (req->r_err || test_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags)) { |
2268 | if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) | |
eb1b8af3 | 2269 | __unregister_request(mdsc, req); |
d5548492 | 2270 | return; |
eb1b8af3 | 2271 | } |
2f2dc053 SW |
2272 | |
2273 | if (req->r_timeout && | |
2274 | time_after_eq(jiffies, req->r_started + req->r_timeout)) { | |
2275 | dout("do_request timed out\n"); | |
2276 | err = -EIO; | |
2277 | goto finish; | |
2278 | } | |
52953d55 | 2279 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) { |
48fec5d0 YZ |
2280 | dout("do_request forced umount\n"); |
2281 | err = -EIO; | |
2282 | goto finish; | |
2283 | } | |
52953d55 | 2284 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_MOUNTING) { |
e9e427f0 YZ |
2285 | if (mdsc->mdsmap_err) { |
2286 | err = mdsc->mdsmap_err; | |
2287 | dout("do_request mdsmap err %d\n", err); | |
2288 | goto finish; | |
2289 | } | |
cc8e8342 YZ |
2290 | if (mdsc->mdsmap->m_epoch == 0) { |
2291 | dout("do_request no mdsmap, waiting for map\n"); | |
2292 | list_add(&req->r_wait, &mdsc->waiting_for_map); | |
d5548492 | 2293 | return; |
cc8e8342 | 2294 | } |
e9e427f0 YZ |
2295 | if (!(mdsc->fsc->mount_options->flags & |
2296 | CEPH_MOUNT_OPT_MOUNTWAIT) && | |
2297 | !ceph_mdsmap_is_cluster_available(mdsc->mdsmap)) { | |
2298 | err = -ENOENT; | |
2299 | pr_info("probably no mds server is up\n"); | |
2300 | goto finish; | |
2301 | } | |
2302 | } | |
2f2dc053 | 2303 | |
dc69e2e9 SW |
2304 | put_request_session(req); |
2305 | ||
2f2dc053 SW |
2306 | mds = __choose_mds(mdsc, req); |
2307 | if (mds < 0 || | |
2308 | ceph_mdsmap_get_state(mdsc->mdsmap, mds) < CEPH_MDS_STATE_ACTIVE) { | |
2309 | dout("do_request no mds or not active, waiting for map\n"); | |
2310 | list_add(&req->r_wait, &mdsc->waiting_for_map); | |
d5548492 | 2311 | return; |
2f2dc053 SW |
2312 | } |
2313 | ||
2314 | /* get, open session */ | |
2315 | session = __ceph_lookup_mds_session(mdsc, mds); | |
9c423956 | 2316 | if (!session) { |
2f2dc053 | 2317 | session = register_session(mdsc, mds); |
9c423956 SW |
2318 | if (IS_ERR(session)) { |
2319 | err = PTR_ERR(session); | |
2320 | goto finish; | |
2321 | } | |
2322 | } | |
dc69e2e9 SW |
2323 | req->r_session = get_session(session); |
2324 | ||
2f2dc053 | 2325 | dout("do_request mds%d session %p state %s\n", mds, session, |
a687ecaf | 2326 | ceph_session_state_name(session->s_state)); |
2f2dc053 SW |
2327 | if (session->s_state != CEPH_MDS_SESSION_OPEN && |
2328 | session->s_state != CEPH_MDS_SESSION_HUNG) { | |
fcff415c YZ |
2329 | if (session->s_state == CEPH_MDS_SESSION_REJECTED) { |
2330 | err = -EACCES; | |
2331 | goto out_session; | |
2332 | } | |
2f2dc053 SW |
2333 | if (session->s_state == CEPH_MDS_SESSION_NEW || |
2334 | session->s_state == CEPH_MDS_SESSION_CLOSING) | |
2335 | __open_session(mdsc, session); | |
2336 | list_add(&req->r_wait, &session->s_waiting); | |
2337 | goto out_session; | |
2338 | } | |
2339 | ||
2340 | /* send request */ | |
2f2dc053 SW |
2341 | req->r_resend_mds = -1; /* forget any previous mds hint */ |
2342 | ||
2343 | if (req->r_request_started == 0) /* note request start time */ | |
2344 | req->r_request_started = jiffies; | |
2345 | ||
6e6f0923 | 2346 | err = __prepare_send_request(mdsc, req, mds, false); |
2f2dc053 SW |
2347 | if (!err) { |
2348 | ceph_msg_get(req->r_request); | |
2349 | ceph_con_send(&session->s_con, req->r_request); | |
2350 | } | |
2351 | ||
2352 | out_session: | |
2353 | ceph_put_mds_session(session); | |
48fec5d0 YZ |
2354 | finish: |
2355 | if (err) { | |
2356 | dout("__do_request early error %d\n", err); | |
2357 | req->r_err = err; | |
2358 | complete_request(mdsc, req); | |
2359 | __unregister_request(mdsc, req); | |
2360 | } | |
d5548492 | 2361 | return; |
2f2dc053 SW |
2362 | } |
2363 | ||
2364 | /* | |
2365 | * called under mdsc->mutex | |
2366 | */ | |
2367 | static void __wake_requests(struct ceph_mds_client *mdsc, | |
2368 | struct list_head *head) | |
2369 | { | |
ed75ec2c YZ |
2370 | struct ceph_mds_request *req; |
2371 | LIST_HEAD(tmp_list); | |
2372 | ||
2373 | list_splice_init(head, &tmp_list); | |
2f2dc053 | 2374 | |
ed75ec2c YZ |
2375 | while (!list_empty(&tmp_list)) { |
2376 | req = list_entry(tmp_list.next, | |
2377 | struct ceph_mds_request, r_wait); | |
2f2dc053 | 2378 | list_del_init(&req->r_wait); |
7971bd92 | 2379 | dout(" wake request %p tid %llu\n", req, req->r_tid); |
2f2dc053 SW |
2380 | __do_request(mdsc, req); |
2381 | } | |
2382 | } | |
2383 | ||
2384 | /* | |
2385 | * Wake up threads with requests pending for @mds, so that they can | |
29790f26 | 2386 | * resubmit their requests to a possibly different mds. |
2f2dc053 | 2387 | */ |
29790f26 | 2388 | static void kick_requests(struct ceph_mds_client *mdsc, int mds) |
2f2dc053 | 2389 | { |
44ca18f2 | 2390 | struct ceph_mds_request *req; |
282c1052 | 2391 | struct rb_node *p = rb_first(&mdsc->request_tree); |
2f2dc053 SW |
2392 | |
2393 | dout("kick_requests mds%d\n", mds); | |
282c1052 | 2394 | while (p) { |
44ca18f2 | 2395 | req = rb_entry(p, struct ceph_mds_request, r_node); |
282c1052 | 2396 | p = rb_next(p); |
bc2de10d | 2397 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) |
44ca18f2 | 2398 | continue; |
3de22be6 YZ |
2399 | if (req->r_attempts > 0) |
2400 | continue; /* only new requests */ | |
44ca18f2 SW |
2401 | if (req->r_session && |
2402 | req->r_session->s_mds == mds) { | |
2403 | dout(" kicking tid %llu\n", req->r_tid); | |
03974e81 | 2404 | list_del_init(&req->r_wait); |
44ca18f2 | 2405 | __do_request(mdsc, req); |
2f2dc053 SW |
2406 | } |
2407 | } | |
2408 | } | |
2409 | ||
2410 | void ceph_mdsc_submit_request(struct ceph_mds_client *mdsc, | |
2411 | struct ceph_mds_request *req) | |
2412 | { | |
2413 | dout("submit_request on %p\n", req); | |
2414 | mutex_lock(&mdsc->mutex); | |
2415 | __register_request(mdsc, req, NULL); | |
2416 | __do_request(mdsc, req); | |
2417 | mutex_unlock(&mdsc->mutex); | |
2418 | } | |
2419 | ||
2420 | /* | |
2421 | * Synchrously perform an mds request. Take care of all of the | |
2422 | * session setup, forwarding, retry details. | |
2423 | */ | |
2424 | int ceph_mdsc_do_request(struct ceph_mds_client *mdsc, | |
2425 | struct inode *dir, | |
2426 | struct ceph_mds_request *req) | |
2427 | { | |
2428 | int err; | |
2429 | ||
2430 | dout("do_request on %p\n", req); | |
2431 | ||
3dd69aab | 2432 | /* take CAP_PIN refs for r_inode, r_parent, r_old_dentry */ |
2f2dc053 SW |
2433 | if (req->r_inode) |
2434 | ceph_get_cap_refs(ceph_inode(req->r_inode), CEPH_CAP_PIN); | |
3dd69aab JL |
2435 | if (req->r_parent) |
2436 | ceph_get_cap_refs(ceph_inode(req->r_parent), CEPH_CAP_PIN); | |
844d87c3 | 2437 | if (req->r_old_dentry_dir) |
41b02e1f SW |
2438 | ceph_get_cap_refs(ceph_inode(req->r_old_dentry_dir), |
2439 | CEPH_CAP_PIN); | |
2f2dc053 SW |
2440 | |
2441 | /* issue */ | |
2442 | mutex_lock(&mdsc->mutex); | |
2443 | __register_request(mdsc, req, dir); | |
2444 | __do_request(mdsc, req); | |
2445 | ||
e1518c7c SW |
2446 | if (req->r_err) { |
2447 | err = req->r_err; | |
e1518c7c | 2448 | goto out; |
2f2dc053 SW |
2449 | } |
2450 | ||
e1518c7c SW |
2451 | /* wait */ |
2452 | mutex_unlock(&mdsc->mutex); | |
2453 | dout("do_request waiting\n"); | |
5be73034 | 2454 | if (!req->r_timeout && req->r_wait_for_completion) { |
9280be24 | 2455 | err = req->r_wait_for_completion(mdsc, req); |
e1518c7c | 2456 | } else { |
5be73034 ID |
2457 | long timeleft = wait_for_completion_killable_timeout( |
2458 | &req->r_completion, | |
2459 | ceph_timeout_jiffies(req->r_timeout)); | |
2460 | if (timeleft > 0) | |
2461 | err = 0; | |
2462 | else if (!timeleft) | |
2463 | err = -EIO; /* timed out */ | |
2464 | else | |
2465 | err = timeleft; /* killed */ | |
e1518c7c SW |
2466 | } |
2467 | dout("do_request waited, got %d\n", err); | |
2468 | mutex_lock(&mdsc->mutex); | |
5b1daecd | 2469 | |
e1518c7c | 2470 | /* only abort if we didn't race with a real reply */ |
bc2de10d | 2471 | if (test_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags)) { |
e1518c7c SW |
2472 | err = le32_to_cpu(req->r_reply_info.head->result); |
2473 | } else if (err < 0) { | |
2474 | dout("aborted request %lld with %d\n", req->r_tid, err); | |
b4556396 SW |
2475 | |
2476 | /* | |
2477 | * ensure we aren't running concurrently with | |
2478 | * ceph_fill_trace or ceph_readdir_prepopulate, which | |
2479 | * rely on locks (dir mutex) held by our caller. | |
2480 | */ | |
2481 | mutex_lock(&req->r_fill_mutex); | |
e1518c7c | 2482 | req->r_err = err; |
bc2de10d | 2483 | set_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags); |
b4556396 | 2484 | mutex_unlock(&req->r_fill_mutex); |
5b1daecd | 2485 | |
3dd69aab | 2486 | if (req->r_parent && |
167c9e35 SW |
2487 | (req->r_op & CEPH_MDS_OP_WRITE)) |
2488 | ceph_invalidate_dir_request(req); | |
2f2dc053 | 2489 | } else { |
e1518c7c | 2490 | err = req->r_err; |
2f2dc053 | 2491 | } |
2f2dc053 | 2492 | |
e1518c7c SW |
2493 | out: |
2494 | mutex_unlock(&mdsc->mutex); | |
2f2dc053 SW |
2495 | dout("do_request %p done, result %d\n", req, err); |
2496 | return err; | |
2497 | } | |
2498 | ||
167c9e35 | 2499 | /* |
2f276c51 | 2500 | * Invalidate dir's completeness, dentry lease state on an aborted MDS |
167c9e35 SW |
2501 | * namespace request. |
2502 | */ | |
2503 | void ceph_invalidate_dir_request(struct ceph_mds_request *req) | |
2504 | { | |
8d8f371c YZ |
2505 | struct inode *dir = req->r_parent; |
2506 | struct inode *old_dir = req->r_old_dentry_dir; | |
167c9e35 | 2507 | |
8d8f371c | 2508 | dout("invalidate_dir_request %p %p (complete, lease(s))\n", dir, old_dir); |
167c9e35 | 2509 | |
8d8f371c YZ |
2510 | ceph_dir_clear_complete(dir); |
2511 | if (old_dir) | |
2512 | ceph_dir_clear_complete(old_dir); | |
167c9e35 SW |
2513 | if (req->r_dentry) |
2514 | ceph_invalidate_dentry_lease(req->r_dentry); | |
2515 | if (req->r_old_dentry) | |
2516 | ceph_invalidate_dentry_lease(req->r_old_dentry); | |
2517 | } | |
2518 | ||
2f2dc053 SW |
2519 | /* |
2520 | * Handle mds reply. | |
2521 | * | |
2522 | * We take the session mutex and parse and process the reply immediately. | |
2523 | * This preserves the logical ordering of replies, capabilities, etc., sent | |
2524 | * by the MDS as they are applied to our local cache. | |
2525 | */ | |
2526 | static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg) | |
2527 | { | |
2528 | struct ceph_mds_client *mdsc = session->s_mdsc; | |
2529 | struct ceph_mds_request *req; | |
2530 | struct ceph_mds_reply_head *head = msg->front.iov_base; | |
2531 | struct ceph_mds_reply_info_parsed *rinfo; /* parsed reply info */ | |
982d6011 | 2532 | struct ceph_snap_realm *realm; |
2f2dc053 SW |
2533 | u64 tid; |
2534 | int err, result; | |
2600d2dd | 2535 | int mds = session->s_mds; |
2f2dc053 | 2536 | |
2f2dc053 SW |
2537 | if (msg->front.iov_len < sizeof(*head)) { |
2538 | pr_err("mdsc_handle_reply got corrupt (short) reply\n"); | |
9ec7cab1 | 2539 | ceph_msg_dump(msg); |
2f2dc053 SW |
2540 | return; |
2541 | } | |
2542 | ||
2543 | /* get request, session */ | |
6df058c0 | 2544 | tid = le64_to_cpu(msg->hdr.tid); |
2f2dc053 | 2545 | mutex_lock(&mdsc->mutex); |
fcd00b68 | 2546 | req = lookup_get_request(mdsc, tid); |
2f2dc053 SW |
2547 | if (!req) { |
2548 | dout("handle_reply on unknown tid %llu\n", tid); | |
2549 | mutex_unlock(&mdsc->mutex); | |
2550 | return; | |
2551 | } | |
2552 | dout("handle_reply %p\n", req); | |
2f2dc053 SW |
2553 | |
2554 | /* correct session? */ | |
d96d6049 | 2555 | if (req->r_session != session) { |
2f2dc053 SW |
2556 | pr_err("mdsc_handle_reply got %llu on session mds%d" |
2557 | " not mds%d\n", tid, session->s_mds, | |
2558 | req->r_session ? req->r_session->s_mds : -1); | |
2559 | mutex_unlock(&mdsc->mutex); | |
2560 | goto out; | |
2561 | } | |
2562 | ||
2563 | /* dup? */ | |
bc2de10d JL |
2564 | if ((test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags) && !head->safe) || |
2565 | (test_bit(CEPH_MDS_R_GOT_SAFE, &req->r_req_flags) && head->safe)) { | |
f3ae1b97 | 2566 | pr_warn("got a dup %s reply on %llu from mds%d\n", |
2f2dc053 SW |
2567 | head->safe ? "safe" : "unsafe", tid, mds); |
2568 | mutex_unlock(&mdsc->mutex); | |
2569 | goto out; | |
2570 | } | |
bc2de10d | 2571 | if (test_bit(CEPH_MDS_R_GOT_SAFE, &req->r_req_flags)) { |
f3ae1b97 | 2572 | pr_warn("got unsafe after safe on %llu from mds%d\n", |
85792d0d SW |
2573 | tid, mds); |
2574 | mutex_unlock(&mdsc->mutex); | |
2575 | goto out; | |
2576 | } | |
2f2dc053 SW |
2577 | |
2578 | result = le32_to_cpu(head->result); | |
2579 | ||
2580 | /* | |
e55b71f8 GF |
2581 | * Handle an ESTALE |
2582 | * if we're not talking to the authority, send to them | |
2583 | * if the authority has changed while we weren't looking, | |
2584 | * send to new authority | |
2585 | * Otherwise we just have to return an ESTALE | |
2f2dc053 SW |
2586 | */ |
2587 | if (result == -ESTALE) { | |
4c069a58 | 2588 | dout("got ESTALE on request %llu\n", req->r_tid); |
51da8e8c | 2589 | req->r_resend_mds = -1; |
ca18bede | 2590 | if (req->r_direct_mode != USE_AUTH_MDS) { |
4c069a58 | 2591 | dout("not using auth, setting for that now\n"); |
e55b71f8 | 2592 | req->r_direct_mode = USE_AUTH_MDS; |
2f2dc053 SW |
2593 | __do_request(mdsc, req); |
2594 | mutex_unlock(&mdsc->mutex); | |
2595 | goto out; | |
e55b71f8 | 2596 | } else { |
ca18bede YZ |
2597 | int mds = __choose_mds(mdsc, req); |
2598 | if (mds >= 0 && mds != req->r_session->s_mds) { | |
4c069a58 | 2599 | dout("but auth changed, so resending\n"); |
e55b71f8 GF |
2600 | __do_request(mdsc, req); |
2601 | mutex_unlock(&mdsc->mutex); | |
2602 | goto out; | |
2603 | } | |
2f2dc053 | 2604 | } |
4c069a58 | 2605 | dout("have to return ESTALE on request %llu\n", req->r_tid); |
2f2dc053 SW |
2606 | } |
2607 | ||
e55b71f8 | 2608 | |
2f2dc053 | 2609 | if (head->safe) { |
bc2de10d | 2610 | set_bit(CEPH_MDS_R_GOT_SAFE, &req->r_req_flags); |
2f2dc053 | 2611 | __unregister_request(mdsc, req); |
2f2dc053 | 2612 | |
bc2de10d | 2613 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { |
2f2dc053 SW |
2614 | /* |
2615 | * We already handled the unsafe response, now do the | |
2616 | * cleanup. No need to examine the response; the MDS | |
2617 | * doesn't include any result info in the safe | |
2618 | * response. And even if it did, there is nothing | |
2619 | * useful we could do with a revised return value. | |
2620 | */ | |
2621 | dout("got safe reply %llu, mds%d\n", tid, mds); | |
2f2dc053 SW |
2622 | |
2623 | /* last unsafe request during umount? */ | |
44ca18f2 | 2624 | if (mdsc->stopping && !__get_oldest_req(mdsc)) |
03066f23 | 2625 | complete_all(&mdsc->safe_umount_waiters); |
2f2dc053 SW |
2626 | mutex_unlock(&mdsc->mutex); |
2627 | goto out; | |
2628 | } | |
e1518c7c | 2629 | } else { |
bc2de10d | 2630 | set_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags); |
2f2dc053 | 2631 | list_add_tail(&req->r_unsafe_item, &req->r_session->s_unsafe); |
4c06ace8 YZ |
2632 | if (req->r_unsafe_dir) { |
2633 | struct ceph_inode_info *ci = | |
2634 | ceph_inode(req->r_unsafe_dir); | |
2635 | spin_lock(&ci->i_unsafe_lock); | |
2636 | list_add_tail(&req->r_unsafe_dir_item, | |
2637 | &ci->i_unsafe_dirops); | |
2638 | spin_unlock(&ci->i_unsafe_lock); | |
2639 | } | |
2f2dc053 SW |
2640 | } |
2641 | ||
2642 | dout("handle_reply tid %lld result %d\n", tid, result); | |
2643 | rinfo = &req->r_reply_info; | |
14303d20 | 2644 | err = parse_reply_info(msg, rinfo, session->s_con.peer_features); |
2f2dc053 SW |
2645 | mutex_unlock(&mdsc->mutex); |
2646 | ||
2647 | mutex_lock(&session->s_mutex); | |
2648 | if (err < 0) { | |
25933abd | 2649 | pr_err("mdsc_handle_reply got corrupt reply mds%d(tid:%lld)\n", mds, tid); |
9ec7cab1 | 2650 | ceph_msg_dump(msg); |
2f2dc053 SW |
2651 | goto out_err; |
2652 | } | |
2653 | ||
2654 | /* snap trace */ | |
982d6011 | 2655 | realm = NULL; |
2f2dc053 SW |
2656 | if (rinfo->snapblob_len) { |
2657 | down_write(&mdsc->snap_rwsem); | |
2658 | ceph_update_snap_trace(mdsc, rinfo->snapblob, | |
982d6011 YZ |
2659 | rinfo->snapblob + rinfo->snapblob_len, |
2660 | le32_to_cpu(head->op) == CEPH_MDS_OP_RMSNAP, | |
2661 | &realm); | |
2f2dc053 SW |
2662 | downgrade_write(&mdsc->snap_rwsem); |
2663 | } else { | |
2664 | down_read(&mdsc->snap_rwsem); | |
2665 | } | |
2666 | ||
2667 | /* insert trace into our cache */ | |
b4556396 | 2668 | mutex_lock(&req->r_fill_mutex); |
315f2408 | 2669 | current->journal_info = req; |
f5a03b08 | 2670 | err = ceph_fill_trace(mdsc->fsc->sb, req); |
2f2dc053 | 2671 | if (err == 0) { |
6e8575fa | 2672 | if (result == 0 && (req->r_op == CEPH_MDS_OP_READDIR || |
81c6aea5 | 2673 | req->r_op == CEPH_MDS_OP_LSSNAP)) |
2f2dc053 | 2674 | ceph_readdir_prepopulate(req, req->r_session); |
37151668 | 2675 | ceph_unreserve_caps(mdsc, &req->r_caps_reservation); |
2f2dc053 | 2676 | } |
315f2408 | 2677 | current->journal_info = NULL; |
b4556396 | 2678 | mutex_unlock(&req->r_fill_mutex); |
2f2dc053 SW |
2679 | |
2680 | up_read(&mdsc->snap_rwsem); | |
982d6011 YZ |
2681 | if (realm) |
2682 | ceph_put_snap_realm(mdsc, realm); | |
68cd5b4b | 2683 | |
bc2de10d JL |
2684 | if (err == 0 && req->r_target_inode && |
2685 | test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) { | |
68cd5b4b YZ |
2686 | struct ceph_inode_info *ci = ceph_inode(req->r_target_inode); |
2687 | spin_lock(&ci->i_unsafe_lock); | |
2688 | list_add_tail(&req->r_unsafe_target_item, &ci->i_unsafe_iops); | |
2689 | spin_unlock(&ci->i_unsafe_lock); | |
2690 | } | |
2f2dc053 | 2691 | out_err: |
e1518c7c | 2692 | mutex_lock(&mdsc->mutex); |
bc2de10d | 2693 | if (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { |
e1518c7c SW |
2694 | if (err) { |
2695 | req->r_err = err; | |
2696 | } else { | |
5fdb1389 | 2697 | req->r_reply = ceph_msg_get(msg); |
bc2de10d | 2698 | set_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags); |
e1518c7c | 2699 | } |
2f2dc053 | 2700 | } else { |
e1518c7c | 2701 | dout("reply arrived after request %lld was aborted\n", tid); |
2f2dc053 | 2702 | } |
e1518c7c | 2703 | mutex_unlock(&mdsc->mutex); |
2f2dc053 | 2704 | |
2f2dc053 SW |
2705 | mutex_unlock(&session->s_mutex); |
2706 | ||
2707 | /* kick calling process */ | |
2708 | complete_request(mdsc, req); | |
2709 | out: | |
2710 | ceph_mdsc_put_request(req); | |
2711 | return; | |
2712 | } | |
2713 | ||
2714 | ||
2715 | ||
2716 | /* | |
2717 | * handle mds notification that our request has been forwarded. | |
2718 | */ | |
2600d2dd SW |
2719 | static void handle_forward(struct ceph_mds_client *mdsc, |
2720 | struct ceph_mds_session *session, | |
2721 | struct ceph_msg *msg) | |
2f2dc053 SW |
2722 | { |
2723 | struct ceph_mds_request *req; | |
a1ea787c | 2724 | u64 tid = le64_to_cpu(msg->hdr.tid); |
2f2dc053 SW |
2725 | u32 next_mds; |
2726 | u32 fwd_seq; | |
2f2dc053 SW |
2727 | int err = -EINVAL; |
2728 | void *p = msg->front.iov_base; | |
2729 | void *end = p + msg->front.iov_len; | |
2f2dc053 | 2730 | |
a1ea787c | 2731 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); |
c89136ea SW |
2732 | next_mds = ceph_decode_32(&p); |
2733 | fwd_seq = ceph_decode_32(&p); | |
2f2dc053 SW |
2734 | |
2735 | mutex_lock(&mdsc->mutex); | |
fcd00b68 | 2736 | req = lookup_get_request(mdsc, tid); |
2f2dc053 | 2737 | if (!req) { |
2a8e5e36 | 2738 | dout("forward tid %llu to mds%d - req dne\n", tid, next_mds); |
2f2dc053 SW |
2739 | goto out; /* dup reply? */ |
2740 | } | |
2741 | ||
bc2de10d | 2742 | if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) { |
2a8e5e36 SW |
2743 | dout("forward tid %llu aborted, unregistering\n", tid); |
2744 | __unregister_request(mdsc, req); | |
2745 | } else if (fwd_seq <= req->r_num_fwd) { | |
2746 | dout("forward tid %llu to mds%d - old seq %d <= %d\n", | |
2f2dc053 SW |
2747 | tid, next_mds, req->r_num_fwd, fwd_seq); |
2748 | } else { | |
2749 | /* resend. forward race not possible; mds would drop */ | |
2a8e5e36 SW |
2750 | dout("forward tid %llu to mds%d (we resend)\n", tid, next_mds); |
2751 | BUG_ON(req->r_err); | |
bc2de10d | 2752 | BUG_ON(test_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags)); |
3de22be6 | 2753 | req->r_attempts = 0; |
2f2dc053 SW |
2754 | req->r_num_fwd = fwd_seq; |
2755 | req->r_resend_mds = next_mds; | |
2756 | put_request_session(req); | |
2757 | __do_request(mdsc, req); | |
2758 | } | |
2759 | ceph_mdsc_put_request(req); | |
2760 | out: | |
2761 | mutex_unlock(&mdsc->mutex); | |
2762 | return; | |
2763 | ||
2764 | bad: | |
2765 | pr_err("mdsc_handle_forward decode error err=%d\n", err); | |
2766 | } | |
2767 | ||
2768 | /* | |
2769 | * handle a mds session control message | |
2770 | */ | |
2771 | static void handle_session(struct ceph_mds_session *session, | |
2772 | struct ceph_msg *msg) | |
2773 | { | |
2774 | struct ceph_mds_client *mdsc = session->s_mdsc; | |
2775 | u32 op; | |
2776 | u64 seq; | |
2600d2dd | 2777 | int mds = session->s_mds; |
2f2dc053 SW |
2778 | struct ceph_mds_session_head *h = msg->front.iov_base; |
2779 | int wake = 0; | |
2780 | ||
2f2dc053 | 2781 | /* decode */ |
342ce182 | 2782 | if (msg->front.iov_len < sizeof(*h)) |
2f2dc053 SW |
2783 | goto bad; |
2784 | op = le32_to_cpu(h->op); | |
2785 | seq = le64_to_cpu(h->seq); | |
2786 | ||
2787 | mutex_lock(&mdsc->mutex); | |
0a07fc8c YZ |
2788 | if (op == CEPH_SESSION_CLOSE) { |
2789 | get_session(session); | |
2600d2dd | 2790 | __unregister_session(mdsc, session); |
0a07fc8c | 2791 | } |
2f2dc053 SW |
2792 | /* FIXME: this ttl calculation is generous */ |
2793 | session->s_ttl = jiffies + HZ*mdsc->mdsmap->m_session_autoclose; | |
2794 | mutex_unlock(&mdsc->mutex); | |
2795 | ||
2796 | mutex_lock(&session->s_mutex); | |
2797 | ||
2798 | dout("handle_session mds%d %s %p state %s seq %llu\n", | |
2799 | mds, ceph_session_op_name(op), session, | |
a687ecaf | 2800 | ceph_session_state_name(session->s_state), seq); |
2f2dc053 SW |
2801 | |
2802 | if (session->s_state == CEPH_MDS_SESSION_HUNG) { | |
2803 | session->s_state = CEPH_MDS_SESSION_OPEN; | |
2804 | pr_info("mds%d came back\n", session->s_mds); | |
2805 | } | |
2806 | ||
2807 | switch (op) { | |
2808 | case CEPH_SESSION_OPEN: | |
29790f26 SW |
2809 | if (session->s_state == CEPH_MDS_SESSION_RECONNECTING) |
2810 | pr_info("mds%d reconnect success\n", session->s_mds); | |
2f2dc053 SW |
2811 | session->s_state = CEPH_MDS_SESSION_OPEN; |
2812 | renewed_caps(mdsc, session, 0); | |
2813 | wake = 1; | |
2814 | if (mdsc->stopping) | |
2815 | __close_session(mdsc, session); | |
2816 | break; | |
2817 | ||
2818 | case CEPH_SESSION_RENEWCAPS: | |
2819 | if (session->s_renew_seq == seq) | |
2820 | renewed_caps(mdsc, session, 1); | |
2821 | break; | |
2822 | ||
2823 | case CEPH_SESSION_CLOSE: | |
29790f26 SW |
2824 | if (session->s_state == CEPH_MDS_SESSION_RECONNECTING) |
2825 | pr_info("mds%d reconnect denied\n", session->s_mds); | |
1c841a96 | 2826 | cleanup_session_requests(mdsc, session); |
2f2dc053 | 2827 | remove_session_caps(session); |
656e4382 | 2828 | wake = 2; /* for good measure */ |
f3c60c59 | 2829 | wake_up_all(&mdsc->session_close_wq); |
2f2dc053 SW |
2830 | break; |
2831 | ||
2832 | case CEPH_SESSION_STALE: | |
2833 | pr_info("mds%d caps went stale, renewing\n", | |
2834 | session->s_mds); | |
d8fb02ab | 2835 | spin_lock(&session->s_gen_ttl_lock); |
2f2dc053 | 2836 | session->s_cap_gen++; |
1ce208a6 | 2837 | session->s_cap_ttl = jiffies - 1; |
d8fb02ab | 2838 | spin_unlock(&session->s_gen_ttl_lock); |
2f2dc053 SW |
2839 | send_renew_caps(mdsc, session); |
2840 | break; | |
2841 | ||
2842 | case CEPH_SESSION_RECALL_STATE: | |
e30ee581 | 2843 | ceph_trim_caps(mdsc, session, le32_to_cpu(h->max_caps)); |
2f2dc053 SW |
2844 | break; |
2845 | ||
186e4f7a YZ |
2846 | case CEPH_SESSION_FLUSHMSG: |
2847 | send_flushmsg_ack(mdsc, session, seq); | |
2848 | break; | |
2849 | ||
03f4fcb0 YZ |
2850 | case CEPH_SESSION_FORCE_RO: |
2851 | dout("force_session_readonly %p\n", session); | |
2852 | spin_lock(&session->s_cap_lock); | |
2853 | session->s_readonly = true; | |
2854 | spin_unlock(&session->s_cap_lock); | |
2855 | wake_up_session_caps(session, 0); | |
2856 | break; | |
2857 | ||
fcff415c YZ |
2858 | case CEPH_SESSION_REJECT: |
2859 | WARN_ON(session->s_state != CEPH_MDS_SESSION_OPENING); | |
2860 | pr_info("mds%d rejected session\n", session->s_mds); | |
2861 | session->s_state = CEPH_MDS_SESSION_REJECTED; | |
2862 | cleanup_session_requests(mdsc, session); | |
2863 | remove_session_caps(session); | |
2864 | wake = 2; /* for good measure */ | |
2865 | break; | |
2866 | ||
2f2dc053 SW |
2867 | default: |
2868 | pr_err("mdsc_handle_session bad op %d mds%d\n", op, mds); | |
2869 | WARN_ON(1); | |
2870 | } | |
2871 | ||
2872 | mutex_unlock(&session->s_mutex); | |
2873 | if (wake) { | |
2874 | mutex_lock(&mdsc->mutex); | |
2875 | __wake_requests(mdsc, &session->s_waiting); | |
656e4382 YZ |
2876 | if (wake == 2) |
2877 | kick_requests(mdsc, mds); | |
2f2dc053 SW |
2878 | mutex_unlock(&mdsc->mutex); |
2879 | } | |
0a07fc8c YZ |
2880 | if (op == CEPH_SESSION_CLOSE) |
2881 | ceph_put_mds_session(session); | |
2f2dc053 SW |
2882 | return; |
2883 | ||
2884 | bad: | |
2885 | pr_err("mdsc_handle_session corrupt message mds%d len %d\n", mds, | |
2886 | (int)msg->front.iov_len); | |
9ec7cab1 | 2887 | ceph_msg_dump(msg); |
2f2dc053 SW |
2888 | return; |
2889 | } | |
2890 | ||
2891 | ||
2892 | /* | |
2893 | * called under session->mutex. | |
2894 | */ | |
2895 | static void replay_unsafe_requests(struct ceph_mds_client *mdsc, | |
2896 | struct ceph_mds_session *session) | |
2897 | { | |
2898 | struct ceph_mds_request *req, *nreq; | |
3de22be6 | 2899 | struct rb_node *p; |
2f2dc053 SW |
2900 | int err; |
2901 | ||
2902 | dout("replay_unsafe_requests mds%d\n", session->s_mds); | |
2903 | ||
2904 | mutex_lock(&mdsc->mutex); | |
2905 | list_for_each_entry_safe(req, nreq, &session->s_unsafe, r_unsafe_item) { | |
6e6f0923 | 2906 | err = __prepare_send_request(mdsc, req, session->s_mds, true); |
2f2dc053 SW |
2907 | if (!err) { |
2908 | ceph_msg_get(req->r_request); | |
2909 | ceph_con_send(&session->s_con, req->r_request); | |
2910 | } | |
2911 | } | |
3de22be6 YZ |
2912 | |
2913 | /* | |
2914 | * also re-send old requests when MDS enters reconnect stage. So that MDS | |
2915 | * can process completed request in clientreplay stage. | |
2916 | */ | |
2917 | p = rb_first(&mdsc->request_tree); | |
2918 | while (p) { | |
2919 | req = rb_entry(p, struct ceph_mds_request, r_node); | |
2920 | p = rb_next(p); | |
bc2de10d | 2921 | if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) |
3de22be6 YZ |
2922 | continue; |
2923 | if (req->r_attempts == 0) | |
2924 | continue; /* only old requests */ | |
2925 | if (req->r_session && | |
2926 | req->r_session->s_mds == session->s_mds) { | |
6e6f0923 YZ |
2927 | err = __prepare_send_request(mdsc, req, |
2928 | session->s_mds, true); | |
3de22be6 YZ |
2929 | if (!err) { |
2930 | ceph_msg_get(req->r_request); | |
2931 | ceph_con_send(&session->s_con, req->r_request); | |
2932 | } | |
2933 | } | |
2934 | } | |
2f2dc053 SW |
2935 | mutex_unlock(&mdsc->mutex); |
2936 | } | |
2937 | ||
2938 | /* | |
2939 | * Encode information about a cap for a reconnect with the MDS. | |
2940 | */ | |
2f2dc053 SW |
2941 | static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap, |
2942 | void *arg) | |
2943 | { | |
20cb34ae SW |
2944 | union { |
2945 | struct ceph_mds_cap_reconnect v2; | |
2946 | struct ceph_mds_cap_reconnect_v1 v1; | |
2947 | } rec; | |
b3f8d68f | 2948 | struct ceph_inode_info *ci = cap->ci; |
20cb34ae SW |
2949 | struct ceph_reconnect_state *recon_state = arg; |
2950 | struct ceph_pagelist *pagelist = recon_state->pagelist; | |
2f2dc053 SW |
2951 | char *path; |
2952 | int pathlen, err; | |
2953 | u64 pathbase; | |
3469ed0d | 2954 | u64 snap_follows; |
2f2dc053 SW |
2955 | struct dentry *dentry; |
2956 | ||
2f2dc053 SW |
2957 | dout(" adding %p ino %llx.%llx cap %p %lld %s\n", |
2958 | inode, ceph_vinop(inode), cap, cap->cap_id, | |
2959 | ceph_cap_string(cap->issued)); | |
93cea5be SW |
2960 | err = ceph_pagelist_encode_64(pagelist, ceph_ino(inode)); |
2961 | if (err) | |
2962 | return err; | |
2f2dc053 SW |
2963 | |
2964 | dentry = d_find_alias(inode); | |
2965 | if (dentry) { | |
2966 | path = ceph_mdsc_build_path(dentry, &pathlen, &pathbase, 0); | |
2967 | if (IS_ERR(path)) { | |
2968 | err = PTR_ERR(path); | |
e072f8aa | 2969 | goto out_dput; |
2f2dc053 SW |
2970 | } |
2971 | } else { | |
2972 | path = NULL; | |
2973 | pathlen = 0; | |
4eacd4cb | 2974 | pathbase = 0; |
2f2dc053 | 2975 | } |
2f2dc053 | 2976 | |
be655596 | 2977 | spin_lock(&ci->i_ceph_lock); |
2f2dc053 SW |
2978 | cap->seq = 0; /* reset cap seq */ |
2979 | cap->issue_seq = 0; /* and issue_seq */ | |
667ca05c | 2980 | cap->mseq = 0; /* and migrate_seq */ |
99a9c273 | 2981 | cap->cap_gen = cap->session->s_cap_gen; |
20cb34ae | 2982 | |
121f22a1 | 2983 | if (recon_state->msg_version >= 2) { |
20cb34ae SW |
2984 | rec.v2.cap_id = cpu_to_le64(cap->cap_id); |
2985 | rec.v2.wanted = cpu_to_le32(__ceph_caps_wanted(ci)); | |
2986 | rec.v2.issued = cpu_to_le32(cap->issued); | |
2987 | rec.v2.snaprealm = cpu_to_le64(ci->i_snap_realm->ino); | |
2988 | rec.v2.pathbase = cpu_to_le64(pathbase); | |
ec1dff25 JL |
2989 | rec.v2.flock_len = (__force __le32) |
2990 | ((ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) ? 0 : 1); | |
20cb34ae SW |
2991 | } else { |
2992 | rec.v1.cap_id = cpu_to_le64(cap->cap_id); | |
2993 | rec.v1.wanted = cpu_to_le32(__ceph_caps_wanted(ci)); | |
2994 | rec.v1.issued = cpu_to_le32(cap->issued); | |
2995 | rec.v1.size = cpu_to_le64(inode->i_size); | |
9bbeab41 AB |
2996 | ceph_encode_timespec64(&rec.v1.mtime, &inode->i_mtime); |
2997 | ceph_encode_timespec64(&rec.v1.atime, &inode->i_atime); | |
20cb34ae SW |
2998 | rec.v1.snaprealm = cpu_to_le64(ci->i_snap_realm->ino); |
2999 | rec.v1.pathbase = cpu_to_le64(pathbase); | |
20cb34ae | 3000 | } |
3469ed0d YZ |
3001 | |
3002 | if (list_empty(&ci->i_cap_snaps)) { | |
92776fd2 | 3003 | snap_follows = ci->i_head_snapc ? ci->i_head_snapc->seq : 0; |
3469ed0d YZ |
3004 | } else { |
3005 | struct ceph_cap_snap *capsnap = | |
3006 | list_first_entry(&ci->i_cap_snaps, | |
3007 | struct ceph_cap_snap, ci_item); | |
3008 | snap_follows = capsnap->follows; | |
20cb34ae | 3009 | } |
be655596 | 3010 | spin_unlock(&ci->i_ceph_lock); |
2f2dc053 | 3011 | |
121f22a1 | 3012 | if (recon_state->msg_version >= 2) { |
40819f6f | 3013 | int num_fcntl_locks, num_flock_locks; |
4deb14a2 | 3014 | struct ceph_filelock *flocks = NULL; |
121f22a1 YZ |
3015 | size_t struct_len, total_len = 0; |
3016 | u8 struct_v = 0; | |
39be95e9 JS |
3017 | |
3018 | encode_again: | |
b3f8d68f YZ |
3019 | if (rec.v2.flock_len) { |
3020 | ceph_count_locks(inode, &num_fcntl_locks, &num_flock_locks); | |
3021 | } else { | |
3022 | num_fcntl_locks = 0; | |
3023 | num_flock_locks = 0; | |
3024 | } | |
4deb14a2 | 3025 | if (num_fcntl_locks + num_flock_locks > 0) { |
6da2ec56 KC |
3026 | flocks = kmalloc_array(num_fcntl_locks + num_flock_locks, |
3027 | sizeof(struct ceph_filelock), | |
3028 | GFP_NOFS); | |
4deb14a2 YZ |
3029 | if (!flocks) { |
3030 | err = -ENOMEM; | |
3031 | goto out_free; | |
3032 | } | |
3033 | err = ceph_encode_locks_to_buffer(inode, flocks, | |
3034 | num_fcntl_locks, | |
3035 | num_flock_locks); | |
3036 | if (err) { | |
3037 | kfree(flocks); | |
3038 | flocks = NULL; | |
3039 | if (err == -ENOSPC) | |
3040 | goto encode_again; | |
3041 | goto out_free; | |
3042 | } | |
3043 | } else { | |
39be95e9 | 3044 | kfree(flocks); |
4deb14a2 | 3045 | flocks = NULL; |
39be95e9 | 3046 | } |
121f22a1 YZ |
3047 | |
3048 | if (recon_state->msg_version >= 3) { | |
3049 | /* version, compat_version and struct_len */ | |
3050 | total_len = 2 * sizeof(u8) + sizeof(u32); | |
3469ed0d | 3051 | struct_v = 2; |
121f22a1 | 3052 | } |
39be95e9 JS |
3053 | /* |
3054 | * number of encoded locks is stable, so copy to pagelist | |
3055 | */ | |
121f22a1 YZ |
3056 | struct_len = 2 * sizeof(u32) + |
3057 | (num_fcntl_locks + num_flock_locks) * | |
3058 | sizeof(struct ceph_filelock); | |
3059 | rec.v2.flock_len = cpu_to_le32(struct_len); | |
3060 | ||
3061 | struct_len += sizeof(rec.v2); | |
3062 | struct_len += sizeof(u32) + pathlen; | |
3063 | ||
3469ed0d YZ |
3064 | if (struct_v >= 2) |
3065 | struct_len += sizeof(u64); /* snap_follows */ | |
3066 | ||
121f22a1 YZ |
3067 | total_len += struct_len; |
3068 | err = ceph_pagelist_reserve(pagelist, total_len); | |
3069 | ||
3070 | if (!err) { | |
3071 | if (recon_state->msg_version >= 3) { | |
3072 | ceph_pagelist_encode_8(pagelist, struct_v); | |
3073 | ceph_pagelist_encode_8(pagelist, 1); | |
3074 | ceph_pagelist_encode_32(pagelist, struct_len); | |
3075 | } | |
3076 | ceph_pagelist_encode_string(pagelist, path, pathlen); | |
3077 | ceph_pagelist_append(pagelist, &rec, sizeof(rec.v2)); | |
3078 | ceph_locks_to_pagelist(flocks, pagelist, | |
3079 | num_fcntl_locks, | |
3080 | num_flock_locks); | |
3469ed0d YZ |
3081 | if (struct_v >= 2) |
3082 | ceph_pagelist_encode_64(pagelist, snap_follows); | |
121f22a1 | 3083 | } |
39be95e9 | 3084 | kfree(flocks); |
3612abbd | 3085 | } else { |
121f22a1 YZ |
3086 | size_t size = sizeof(u32) + pathlen + sizeof(rec.v1); |
3087 | err = ceph_pagelist_reserve(pagelist, size); | |
3088 | if (!err) { | |
3089 | ceph_pagelist_encode_string(pagelist, path, pathlen); | |
3090 | ceph_pagelist_append(pagelist, &rec, sizeof(rec.v1)); | |
3091 | } | |
40819f6f | 3092 | } |
44c99757 YZ |
3093 | |
3094 | recon_state->nr_caps++; | |
e072f8aa | 3095 | out_free: |
2f2dc053 | 3096 | kfree(path); |
e072f8aa | 3097 | out_dput: |
2f2dc053 | 3098 | dput(dentry); |
93cea5be | 3099 | return err; |
2f2dc053 SW |
3100 | } |
3101 | ||
3102 | ||
3103 | /* | |
3104 | * If an MDS fails and recovers, clients need to reconnect in order to | |
3105 | * reestablish shared state. This includes all caps issued through | |
3106 | * this session _and_ the snap_realm hierarchy. Because it's not | |
3107 | * clear which snap realms the mds cares about, we send everything we | |
3108 | * know about.. that ensures we'll then get any new info the | |
3109 | * recovering MDS might have. | |
3110 | * | |
3111 | * This is a relatively heavyweight operation, but it's rare. | |
3112 | * | |
3113 | * called with mdsc->mutex held. | |
3114 | */ | |
34b6c855 SW |
3115 | static void send_mds_reconnect(struct ceph_mds_client *mdsc, |
3116 | struct ceph_mds_session *session) | |
2f2dc053 | 3117 | { |
2f2dc053 | 3118 | struct ceph_msg *reply; |
a105f00c | 3119 | struct rb_node *p; |
34b6c855 | 3120 | int mds = session->s_mds; |
9abf82b8 | 3121 | int err = -ENOMEM; |
44c99757 | 3122 | int s_nr_caps; |
93cea5be | 3123 | struct ceph_pagelist *pagelist; |
20cb34ae | 3124 | struct ceph_reconnect_state recon_state; |
c8a96a31 | 3125 | LIST_HEAD(dispose); |
2f2dc053 | 3126 | |
34b6c855 | 3127 | pr_info("mds%d reconnect start\n", mds); |
2f2dc053 | 3128 | |
93cea5be SW |
3129 | pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); |
3130 | if (!pagelist) | |
3131 | goto fail_nopagelist; | |
3132 | ceph_pagelist_init(pagelist); | |
3133 | ||
b61c2763 | 3134 | reply = ceph_msg_new(CEPH_MSG_CLIENT_RECONNECT, 0, GFP_NOFS, false); |
a79832f2 | 3135 | if (!reply) |
93cea5be | 3136 | goto fail_nomsg; |
93cea5be | 3137 | |
34b6c855 SW |
3138 | mutex_lock(&session->s_mutex); |
3139 | session->s_state = CEPH_MDS_SESSION_RECONNECTING; | |
3140 | session->s_seq = 0; | |
2f2dc053 | 3141 | |
2f2dc053 | 3142 | dout("session %p state %s\n", session, |
a687ecaf | 3143 | ceph_session_state_name(session->s_state)); |
2f2dc053 | 3144 | |
99a9c273 YZ |
3145 | spin_lock(&session->s_gen_ttl_lock); |
3146 | session->s_cap_gen++; | |
3147 | spin_unlock(&session->s_gen_ttl_lock); | |
3148 | ||
3149 | spin_lock(&session->s_cap_lock); | |
03f4fcb0 YZ |
3150 | /* don't know if session is readonly */ |
3151 | session->s_readonly = 0; | |
99a9c273 YZ |
3152 | /* |
3153 | * notify __ceph_remove_cap() that we are composing cap reconnect. | |
3154 | * If a cap get released before being added to the cap reconnect, | |
3155 | * __ceph_remove_cap() should skip queuing cap release. | |
3156 | */ | |
3157 | session->s_cap_reconnect = 1; | |
e01a5946 | 3158 | /* drop old cap expires; we're about to reestablish that state */ |
c8a96a31 JL |
3159 | detach_cap_releases(session, &dispose); |
3160 | spin_unlock(&session->s_cap_lock); | |
3161 | dispose_cap_releases(mdsc, &dispose); | |
e01a5946 | 3162 | |
5d23371f | 3163 | /* trim unused caps to reduce MDS's cache rejoin time */ |
c0bd50e2 YZ |
3164 | if (mdsc->fsc->sb->s_root) |
3165 | shrink_dcache_parent(mdsc->fsc->sb->s_root); | |
5d23371f YZ |
3166 | |
3167 | ceph_con_close(&session->s_con); | |
3168 | ceph_con_open(&session->s_con, | |
3169 | CEPH_ENTITY_TYPE_MDS, mds, | |
3170 | ceph_mdsmap_get_addr(mdsc->mdsmap, mds)); | |
3171 | ||
3172 | /* replay unsafe requests */ | |
3173 | replay_unsafe_requests(mdsc, session); | |
3174 | ||
3175 | down_read(&mdsc->snap_rwsem); | |
3176 | ||
2f2dc053 | 3177 | /* traverse this session's caps */ |
44c99757 YZ |
3178 | s_nr_caps = session->s_nr_caps; |
3179 | err = ceph_pagelist_encode_32(pagelist, s_nr_caps); | |
93cea5be SW |
3180 | if (err) |
3181 | goto fail; | |
20cb34ae | 3182 | |
44c99757 | 3183 | recon_state.nr_caps = 0; |
20cb34ae | 3184 | recon_state.pagelist = pagelist; |
121f22a1 YZ |
3185 | if (session->s_con.peer_features & CEPH_FEATURE_MDSENC) |
3186 | recon_state.msg_version = 3; | |
3187 | else if (session->s_con.peer_features & CEPH_FEATURE_FLOCK) | |
3188 | recon_state.msg_version = 2; | |
3189 | else | |
3190 | recon_state.msg_version = 1; | |
20cb34ae | 3191 | err = iterate_session_caps(session, encode_caps_cb, &recon_state); |
2f2dc053 | 3192 | if (err < 0) |
9abf82b8 | 3193 | goto fail; |
2f2dc053 | 3194 | |
99a9c273 YZ |
3195 | spin_lock(&session->s_cap_lock); |
3196 | session->s_cap_reconnect = 0; | |
3197 | spin_unlock(&session->s_cap_lock); | |
3198 | ||
2f2dc053 SW |
3199 | /* |
3200 | * snaprealms. we provide mds with the ino, seq (version), and | |
3201 | * parent for all of our realms. If the mds has any newer info, | |
3202 | * it will tell us. | |
3203 | */ | |
a105f00c SW |
3204 | for (p = rb_first(&mdsc->snap_realms); p; p = rb_next(p)) { |
3205 | struct ceph_snap_realm *realm = | |
3206 | rb_entry(p, struct ceph_snap_realm, node); | |
93cea5be | 3207 | struct ceph_mds_snaprealm_reconnect sr_rec; |
2f2dc053 SW |
3208 | |
3209 | dout(" adding snap realm %llx seq %lld parent %llx\n", | |
3210 | realm->ino, realm->seq, realm->parent_ino); | |
93cea5be SW |
3211 | sr_rec.ino = cpu_to_le64(realm->ino); |
3212 | sr_rec.seq = cpu_to_le64(realm->seq); | |
3213 | sr_rec.parent = cpu_to_le64(realm->parent_ino); | |
3214 | err = ceph_pagelist_append(pagelist, &sr_rec, sizeof(sr_rec)); | |
3215 | if (err) | |
3216 | goto fail; | |
2f2dc053 | 3217 | } |
2f2dc053 | 3218 | |
121f22a1 | 3219 | reply->hdr.version = cpu_to_le16(recon_state.msg_version); |
44c99757 YZ |
3220 | |
3221 | /* raced with cap release? */ | |
3222 | if (s_nr_caps != recon_state.nr_caps) { | |
3223 | struct page *page = list_first_entry(&pagelist->head, | |
3224 | struct page, lru); | |
3225 | __le32 *addr = kmap_atomic(page); | |
3226 | *addr = cpu_to_le32(recon_state.nr_caps); | |
3227 | kunmap_atomic(addr); | |
ebf18f47 | 3228 | } |
44c99757 YZ |
3229 | |
3230 | reply->hdr.data_len = cpu_to_le32(pagelist->length); | |
3231 | ceph_msg_data_add_pagelist(reply, pagelist); | |
e548e9b9 YZ |
3232 | |
3233 | ceph_early_kick_flushing_caps(mdsc, session); | |
3234 | ||
2f2dc053 SW |
3235 | ceph_con_send(&session->s_con, reply); |
3236 | ||
9abf82b8 SW |
3237 | mutex_unlock(&session->s_mutex); |
3238 | ||
3239 | mutex_lock(&mdsc->mutex); | |
3240 | __wake_requests(mdsc, &session->s_waiting); | |
3241 | mutex_unlock(&mdsc->mutex); | |
3242 | ||
2f2dc053 | 3243 | up_read(&mdsc->snap_rwsem); |
2f2dc053 SW |
3244 | return; |
3245 | ||
93cea5be | 3246 | fail: |
2f2dc053 | 3247 | ceph_msg_put(reply); |
9abf82b8 SW |
3248 | up_read(&mdsc->snap_rwsem); |
3249 | mutex_unlock(&session->s_mutex); | |
93cea5be SW |
3250 | fail_nomsg: |
3251 | ceph_pagelist_release(pagelist); | |
93cea5be | 3252 | fail_nopagelist: |
9abf82b8 | 3253 | pr_err("error %d preparing reconnect for mds%d\n", err, mds); |
9abf82b8 | 3254 | return; |
2f2dc053 SW |
3255 | } |
3256 | ||
3257 | ||
3258 | /* | |
3259 | * compare old and new mdsmaps, kicking requests | |
3260 | * and closing out old connections as necessary | |
3261 | * | |
3262 | * called under mdsc->mutex. | |
3263 | */ | |
3264 | static void check_new_map(struct ceph_mds_client *mdsc, | |
3265 | struct ceph_mdsmap *newmap, | |
3266 | struct ceph_mdsmap *oldmap) | |
3267 | { | |
3268 | int i; | |
3269 | int oldstate, newstate; | |
3270 | struct ceph_mds_session *s; | |
3271 | ||
3272 | dout("check_new_map new %u old %u\n", | |
3273 | newmap->m_epoch, oldmap->m_epoch); | |
3274 | ||
76201b63 | 3275 | for (i = 0; i < oldmap->m_num_mds && i < mdsc->max_sessions; i++) { |
d37b1d99 | 3276 | if (!mdsc->sessions[i]) |
2f2dc053 SW |
3277 | continue; |
3278 | s = mdsc->sessions[i]; | |
3279 | oldstate = ceph_mdsmap_get_state(oldmap, i); | |
3280 | newstate = ceph_mdsmap_get_state(newmap, i); | |
3281 | ||
0deb01c9 | 3282 | dout("check_new_map mds%d state %s%s -> %s%s (session %s)\n", |
2f2dc053 | 3283 | i, ceph_mds_state_name(oldstate), |
0deb01c9 | 3284 | ceph_mdsmap_is_laggy(oldmap, i) ? " (laggy)" : "", |
2f2dc053 | 3285 | ceph_mds_state_name(newstate), |
0deb01c9 | 3286 | ceph_mdsmap_is_laggy(newmap, i) ? " (laggy)" : "", |
a687ecaf | 3287 | ceph_session_state_name(s->s_state)); |
2f2dc053 | 3288 | |
76201b63 | 3289 | if (i >= newmap->m_num_mds || |
3e8f43a0 | 3290 | memcmp(ceph_mdsmap_get_addr(oldmap, i), |
2f2dc053 SW |
3291 | ceph_mdsmap_get_addr(newmap, i), |
3292 | sizeof(struct ceph_entity_addr))) { | |
3293 | if (s->s_state == CEPH_MDS_SESSION_OPENING) { | |
3294 | /* the session never opened, just close it | |
3295 | * out now */ | |
0a07fc8c | 3296 | get_session(s); |
2600d2dd | 3297 | __unregister_session(mdsc, s); |
2f2dc053 | 3298 | __wake_requests(mdsc, &s->s_waiting); |
0a07fc8c | 3299 | ceph_put_mds_session(s); |
2827528d YZ |
3300 | } else if (i >= newmap->m_num_mds) { |
3301 | /* force close session for stopped mds */ | |
3302 | get_session(s); | |
2600d2dd | 3303 | __unregister_session(mdsc, s); |
2827528d YZ |
3304 | __wake_requests(mdsc, &s->s_waiting); |
3305 | kick_requests(mdsc, i); | |
3306 | mutex_unlock(&mdsc->mutex); | |
3307 | ||
3308 | mutex_lock(&s->s_mutex); | |
3309 | cleanup_session_requests(mdsc, s); | |
3310 | remove_session_caps(s); | |
3311 | mutex_unlock(&s->s_mutex); | |
3312 | ||
3313 | ceph_put_mds_session(s); | |
3314 | ||
3315 | mutex_lock(&mdsc->mutex); | |
2f2dc053 SW |
3316 | } else { |
3317 | /* just close it */ | |
3318 | mutex_unlock(&mdsc->mutex); | |
3319 | mutex_lock(&s->s_mutex); | |
3320 | mutex_lock(&mdsc->mutex); | |
3321 | ceph_con_close(&s->s_con); | |
3322 | mutex_unlock(&s->s_mutex); | |
3323 | s->s_state = CEPH_MDS_SESSION_RESTARTING; | |
3324 | } | |
2f2dc053 SW |
3325 | } else if (oldstate == newstate) { |
3326 | continue; /* nothing new with this mds */ | |
3327 | } | |
3328 | ||
3329 | /* | |
3330 | * send reconnect? | |
3331 | */ | |
3332 | if (s->s_state == CEPH_MDS_SESSION_RESTARTING && | |
34b6c855 SW |
3333 | newstate >= CEPH_MDS_STATE_RECONNECT) { |
3334 | mutex_unlock(&mdsc->mutex); | |
3335 | send_mds_reconnect(mdsc, s); | |
3336 | mutex_lock(&mdsc->mutex); | |
3337 | } | |
2f2dc053 SW |
3338 | |
3339 | /* | |
29790f26 | 3340 | * kick request on any mds that has gone active. |
2f2dc053 SW |
3341 | */ |
3342 | if (oldstate < CEPH_MDS_STATE_ACTIVE && | |
3343 | newstate >= CEPH_MDS_STATE_ACTIVE) { | |
29790f26 SW |
3344 | if (oldstate != CEPH_MDS_STATE_CREATING && |
3345 | oldstate != CEPH_MDS_STATE_STARTING) | |
3346 | pr_info("mds%d recovery completed\n", s->s_mds); | |
3347 | kick_requests(mdsc, i); | |
2f2dc053 | 3348 | ceph_kick_flushing_caps(mdsc, s); |
0dc2570f | 3349 | wake_up_session_caps(s, 1); |
2f2dc053 SW |
3350 | } |
3351 | } | |
cb170a22 | 3352 | |
76201b63 | 3353 | for (i = 0; i < newmap->m_num_mds && i < mdsc->max_sessions; i++) { |
cb170a22 SW |
3354 | s = mdsc->sessions[i]; |
3355 | if (!s) | |
3356 | continue; | |
3357 | if (!ceph_mdsmap_is_laggy(newmap, i)) | |
3358 | continue; | |
3359 | if (s->s_state == CEPH_MDS_SESSION_OPEN || | |
3360 | s->s_state == CEPH_MDS_SESSION_HUNG || | |
3361 | s->s_state == CEPH_MDS_SESSION_CLOSING) { | |
3362 | dout(" connecting to export targets of laggy mds%d\n", | |
3363 | i); | |
3364 | __open_export_target_sessions(mdsc, s); | |
3365 | } | |
3366 | } | |
2f2dc053 SW |
3367 | } |
3368 | ||
3369 | ||
3370 | ||
3371 | /* | |
3372 | * leases | |
3373 | */ | |
3374 | ||
3375 | /* | |
3376 | * caller must hold session s_mutex, dentry->d_lock | |
3377 | */ | |
3378 | void __ceph_mdsc_drop_dentry_lease(struct dentry *dentry) | |
3379 | { | |
3380 | struct ceph_dentry_info *di = ceph_dentry(dentry); | |
3381 | ||
3382 | ceph_put_mds_session(di->lease_session); | |
3383 | di->lease_session = NULL; | |
3384 | } | |
3385 | ||
2600d2dd SW |
3386 | static void handle_lease(struct ceph_mds_client *mdsc, |
3387 | struct ceph_mds_session *session, | |
3388 | struct ceph_msg *msg) | |
2f2dc053 | 3389 | { |
3d14c5d2 | 3390 | struct super_block *sb = mdsc->fsc->sb; |
2f2dc053 | 3391 | struct inode *inode; |
2f2dc053 SW |
3392 | struct dentry *parent, *dentry; |
3393 | struct ceph_dentry_info *di; | |
2600d2dd | 3394 | int mds = session->s_mds; |
2f2dc053 | 3395 | struct ceph_mds_lease *h = msg->front.iov_base; |
1e5ea23d | 3396 | u32 seq; |
2f2dc053 | 3397 | struct ceph_vino vino; |
2f2dc053 SW |
3398 | struct qstr dname; |
3399 | int release = 0; | |
3400 | ||
2f2dc053 SW |
3401 | dout("handle_lease from mds%d\n", mds); |
3402 | ||
3403 | /* decode */ | |
3404 | if (msg->front.iov_len < sizeof(*h) + sizeof(u32)) | |
3405 | goto bad; | |
3406 | vino.ino = le64_to_cpu(h->ino); | |
3407 | vino.snap = CEPH_NOSNAP; | |
1e5ea23d | 3408 | seq = le32_to_cpu(h->seq); |
0fcf6c02 YZ |
3409 | dname.len = get_unaligned_le32(h + 1); |
3410 | if (msg->front.iov_len < sizeof(*h) + sizeof(u32) + dname.len) | |
2f2dc053 | 3411 | goto bad; |
0fcf6c02 | 3412 | dname.name = (void *)(h + 1) + sizeof(u32); |
2f2dc053 | 3413 | |
2f2dc053 SW |
3414 | /* lookup inode */ |
3415 | inode = ceph_find_inode(sb, vino); | |
2f90b852 SW |
3416 | dout("handle_lease %s, ino %llx %p %.*s\n", |
3417 | ceph_lease_op_name(h->action), vino.ino, inode, | |
1e5ea23d | 3418 | dname.len, dname.name); |
6cd3bcad YZ |
3419 | |
3420 | mutex_lock(&session->s_mutex); | |
3421 | session->s_seq++; | |
3422 | ||
d37b1d99 | 3423 | if (!inode) { |
2f2dc053 SW |
3424 | dout("handle_lease no inode %llx\n", vino.ino); |
3425 | goto release; | |
3426 | } | |
2f2dc053 SW |
3427 | |
3428 | /* dentry */ | |
3429 | parent = d_find_alias(inode); | |
3430 | if (!parent) { | |
3431 | dout("no parent dentry on inode %p\n", inode); | |
3432 | WARN_ON(1); | |
3433 | goto release; /* hrm... */ | |
3434 | } | |
8387ff25 | 3435 | dname.hash = full_name_hash(parent, dname.name, dname.len); |
2f2dc053 SW |
3436 | dentry = d_lookup(parent, &dname); |
3437 | dput(parent); | |
3438 | if (!dentry) | |
3439 | goto release; | |
3440 | ||
3441 | spin_lock(&dentry->d_lock); | |
3442 | di = ceph_dentry(dentry); | |
3443 | switch (h->action) { | |
3444 | case CEPH_MDS_LEASE_REVOKE: | |
3d8eb7a9 | 3445 | if (di->lease_session == session) { |
1e5ea23d SW |
3446 | if (ceph_seq_cmp(di->lease_seq, seq) > 0) |
3447 | h->seq = cpu_to_le32(di->lease_seq); | |
2f2dc053 SW |
3448 | __ceph_mdsc_drop_dentry_lease(dentry); |
3449 | } | |
3450 | release = 1; | |
3451 | break; | |
3452 | ||
3453 | case CEPH_MDS_LEASE_RENEW: | |
3d8eb7a9 | 3454 | if (di->lease_session == session && |
2f2dc053 SW |
3455 | di->lease_gen == session->s_cap_gen && |
3456 | di->lease_renew_from && | |
3457 | di->lease_renew_after == 0) { | |
3458 | unsigned long duration = | |
3563dbdd | 3459 | msecs_to_jiffies(le32_to_cpu(h->duration_ms)); |
2f2dc053 | 3460 | |
1e5ea23d | 3461 | di->lease_seq = seq; |
9b16f03c | 3462 | di->time = di->lease_renew_from + duration; |
2f2dc053 SW |
3463 | di->lease_renew_after = di->lease_renew_from + |
3464 | (duration >> 1); | |
3465 | di->lease_renew_from = 0; | |
3466 | } | |
3467 | break; | |
3468 | } | |
3469 | spin_unlock(&dentry->d_lock); | |
3470 | dput(dentry); | |
3471 | ||
3472 | if (!release) | |
3473 | goto out; | |
3474 | ||
3475 | release: | |
3476 | /* let's just reuse the same message */ | |
3477 | h->action = CEPH_MDS_LEASE_REVOKE_ACK; | |
3478 | ceph_msg_get(msg); | |
3479 | ceph_con_send(&session->s_con, msg); | |
3480 | ||
3481 | out: | |
3482 | iput(inode); | |
3483 | mutex_unlock(&session->s_mutex); | |
2f2dc053 SW |
3484 | return; |
3485 | ||
3486 | bad: | |
3487 | pr_err("corrupt lease message\n"); | |
9ec7cab1 | 3488 | ceph_msg_dump(msg); |
2f2dc053 SW |
3489 | } |
3490 | ||
3491 | void ceph_mdsc_lease_send_msg(struct ceph_mds_session *session, | |
3492 | struct inode *inode, | |
3493 | struct dentry *dentry, char action, | |
3494 | u32 seq) | |
3495 | { | |
3496 | struct ceph_msg *msg; | |
3497 | struct ceph_mds_lease *lease; | |
3498 | int len = sizeof(*lease) + sizeof(u32); | |
3499 | int dnamelen = 0; | |
3500 | ||
3501 | dout("lease_send_msg inode %p dentry %p %s to mds%d\n", | |
3502 | inode, dentry, ceph_lease_op_name(action), session->s_mds); | |
3503 | dnamelen = dentry->d_name.len; | |
3504 | len += dnamelen; | |
3505 | ||
b61c2763 | 3506 | msg = ceph_msg_new(CEPH_MSG_CLIENT_LEASE, len, GFP_NOFS, false); |
a79832f2 | 3507 | if (!msg) |
2f2dc053 SW |
3508 | return; |
3509 | lease = msg->front.iov_base; | |
3510 | lease->action = action; | |
2f2dc053 SW |
3511 | lease->ino = cpu_to_le64(ceph_vino(inode).ino); |
3512 | lease->first = lease->last = cpu_to_le64(ceph_vino(inode).snap); | |
3513 | lease->seq = cpu_to_le32(seq); | |
3514 | put_unaligned_le32(dnamelen, lease + 1); | |
3515 | memcpy((void *)(lease + 1) + 4, dentry->d_name.name, dnamelen); | |
3516 | ||
3517 | /* | |
3518 | * if this is a preemptive lease RELEASE, no need to | |
3519 | * flush request stream, since the actual request will | |
3520 | * soon follow. | |
3521 | */ | |
3522 | msg->more_to_follow = (action == CEPH_MDS_LEASE_RELEASE); | |
3523 | ||
3524 | ceph_con_send(&session->s_con, msg); | |
3525 | } | |
3526 | ||
2f2dc053 | 3527 | /* |
7aac453a | 3528 | * lock unlock sessions, to wait ongoing session activities |
2f2dc053 | 3529 | */ |
7aac453a | 3530 | static void lock_unlock_sessions(struct ceph_mds_client *mdsc) |
2f2dc053 SW |
3531 | { |
3532 | int i; | |
3533 | ||
2f2dc053 SW |
3534 | mutex_lock(&mdsc->mutex); |
3535 | for (i = 0; i < mdsc->max_sessions; i++) { | |
3536 | struct ceph_mds_session *s = __ceph_lookup_mds_session(mdsc, i); | |
3537 | if (!s) | |
3538 | continue; | |
3539 | mutex_unlock(&mdsc->mutex); | |
3540 | mutex_lock(&s->s_mutex); | |
3541 | mutex_unlock(&s->s_mutex); | |
3542 | ceph_put_mds_session(s); | |
3543 | mutex_lock(&mdsc->mutex); | |
3544 | } | |
3545 | mutex_unlock(&mdsc->mutex); | |
3546 | } | |
3547 | ||
3548 | ||
3549 | ||
3550 | /* | |
3551 | * delayed work -- periodically trim expired leases, renew caps with mds | |
3552 | */ | |
3553 | static void schedule_delayed(struct ceph_mds_client *mdsc) | |
3554 | { | |
3555 | int delay = 5; | |
3556 | unsigned hz = round_jiffies_relative(HZ * delay); | |
3557 | schedule_delayed_work(&mdsc->delayed_work, hz); | |
3558 | } | |
3559 | ||
3560 | static void delayed_work(struct work_struct *work) | |
3561 | { | |
3562 | int i; | |
3563 | struct ceph_mds_client *mdsc = | |
3564 | container_of(work, struct ceph_mds_client, delayed_work.work); | |
3565 | int renew_interval; | |
3566 | int renew_caps; | |
3567 | ||
3568 | dout("mdsc delayed_work\n"); | |
afcdaea3 | 3569 | ceph_check_delayed_caps(mdsc); |
2f2dc053 SW |
3570 | |
3571 | mutex_lock(&mdsc->mutex); | |
3572 | renew_interval = mdsc->mdsmap->m_session_timeout >> 2; | |
3573 | renew_caps = time_after_eq(jiffies, HZ*renew_interval + | |
3574 | mdsc->last_renew_caps); | |
3575 | if (renew_caps) | |
3576 | mdsc->last_renew_caps = jiffies; | |
3577 | ||
3578 | for (i = 0; i < mdsc->max_sessions; i++) { | |
3579 | struct ceph_mds_session *s = __ceph_lookup_mds_session(mdsc, i); | |
d37b1d99 | 3580 | if (!s) |
2f2dc053 SW |
3581 | continue; |
3582 | if (s->s_state == CEPH_MDS_SESSION_CLOSING) { | |
3583 | dout("resending session close request for mds%d\n", | |
3584 | s->s_mds); | |
3585 | request_close_session(mdsc, s); | |
3586 | ceph_put_mds_session(s); | |
3587 | continue; | |
3588 | } | |
3589 | if (s->s_ttl && time_after(jiffies, s->s_ttl)) { | |
3590 | if (s->s_state == CEPH_MDS_SESSION_OPEN) { | |
3591 | s->s_state = CEPH_MDS_SESSION_HUNG; | |
3592 | pr_info("mds%d hung\n", s->s_mds); | |
3593 | } | |
3594 | } | |
3595 | if (s->s_state < CEPH_MDS_SESSION_OPEN) { | |
3596 | /* this mds is failed or recovering, just wait */ | |
3597 | ceph_put_mds_session(s); | |
3598 | continue; | |
3599 | } | |
3600 | mutex_unlock(&mdsc->mutex); | |
3601 | ||
3602 | mutex_lock(&s->s_mutex); | |
3603 | if (renew_caps) | |
3604 | send_renew_caps(mdsc, s); | |
3605 | else | |
3606 | ceph_con_keepalive(&s->s_con); | |
aab53dd9 SW |
3607 | if (s->s_state == CEPH_MDS_SESSION_OPEN || |
3608 | s->s_state == CEPH_MDS_SESSION_HUNG) | |
3d7ded4d | 3609 | ceph_send_cap_releases(mdsc, s); |
2f2dc053 SW |
3610 | mutex_unlock(&s->s_mutex); |
3611 | ceph_put_mds_session(s); | |
3612 | ||
3613 | mutex_lock(&mdsc->mutex); | |
3614 | } | |
3615 | mutex_unlock(&mdsc->mutex); | |
3616 | ||
3617 | schedule_delayed(mdsc); | |
3618 | } | |
3619 | ||
3d14c5d2 | 3620 | int ceph_mdsc_init(struct ceph_fs_client *fsc) |
2f2dc053 | 3621 | |
2f2dc053 | 3622 | { |
3d14c5d2 YS |
3623 | struct ceph_mds_client *mdsc; |
3624 | ||
3625 | mdsc = kzalloc(sizeof(struct ceph_mds_client), GFP_NOFS); | |
3626 | if (!mdsc) | |
3627 | return -ENOMEM; | |
3628 | mdsc->fsc = fsc; | |
2f2dc053 SW |
3629 | mutex_init(&mdsc->mutex); |
3630 | mdsc->mdsmap = kzalloc(sizeof(*mdsc->mdsmap), GFP_NOFS); | |
d37b1d99 | 3631 | if (!mdsc->mdsmap) { |
fb3101b6 | 3632 | kfree(mdsc); |
2d06eeb8 | 3633 | return -ENOMEM; |
fb3101b6 | 3634 | } |
2d06eeb8 | 3635 | |
50c55aec | 3636 | fsc->mdsc = mdsc; |
2f2dc053 | 3637 | init_completion(&mdsc->safe_umount_waiters); |
f3c60c59 | 3638 | init_waitqueue_head(&mdsc->session_close_wq); |
2f2dc053 SW |
3639 | INIT_LIST_HEAD(&mdsc->waiting_for_map); |
3640 | mdsc->sessions = NULL; | |
86d8f67b | 3641 | atomic_set(&mdsc->num_sessions, 0); |
2f2dc053 SW |
3642 | mdsc->max_sessions = 0; |
3643 | mdsc->stopping = 0; | |
d557c48d | 3644 | atomic64_set(&mdsc->quotarealms_count, 0); |
affbc19a | 3645 | mdsc->last_snap_seq = 0; |
2f2dc053 | 3646 | init_rwsem(&mdsc->snap_rwsem); |
a105f00c | 3647 | mdsc->snap_realms = RB_ROOT; |
2f2dc053 SW |
3648 | INIT_LIST_HEAD(&mdsc->snap_empty); |
3649 | spin_lock_init(&mdsc->snap_empty_lock); | |
3650 | mdsc->last_tid = 0; | |
e8a7b8b1 | 3651 | mdsc->oldest_tid = 0; |
44ca18f2 | 3652 | mdsc->request_tree = RB_ROOT; |
2f2dc053 SW |
3653 | INIT_DELAYED_WORK(&mdsc->delayed_work, delayed_work); |
3654 | mdsc->last_renew_caps = jiffies; | |
3655 | INIT_LIST_HEAD(&mdsc->cap_delay_list); | |
3656 | spin_lock_init(&mdsc->cap_delay_lock); | |
3657 | INIT_LIST_HEAD(&mdsc->snap_flush_list); | |
3658 | spin_lock_init(&mdsc->snap_flush_lock); | |
553adfd9 | 3659 | mdsc->last_cap_flush_tid = 1; |
e4500b5e | 3660 | INIT_LIST_HEAD(&mdsc->cap_flush_list); |
2f2dc053 | 3661 | INIT_LIST_HEAD(&mdsc->cap_dirty); |
db354052 | 3662 | INIT_LIST_HEAD(&mdsc->cap_dirty_migrating); |
2f2dc053 SW |
3663 | mdsc->num_cap_flushing = 0; |
3664 | spin_lock_init(&mdsc->cap_dirty_lock); | |
3665 | init_waitqueue_head(&mdsc->cap_flushing_wq); | |
3666 | spin_lock_init(&mdsc->dentry_lru_lock); | |
3667 | INIT_LIST_HEAD(&mdsc->dentry_lru); | |
2d06eeb8 | 3668 | |
37151668 | 3669 | ceph_caps_init(mdsc); |
3d14c5d2 | 3670 | ceph_adjust_min_caps(mdsc, fsc->min_caps); |
37151668 | 3671 | |
10183a69 YZ |
3672 | init_rwsem(&mdsc->pool_perm_rwsem); |
3673 | mdsc->pool_perm_tree = RB_ROOT; | |
3674 | ||
dfeb84d4 YZ |
3675 | strscpy(mdsc->nodename, utsname()->nodename, |
3676 | sizeof(mdsc->nodename)); | |
5f44f142 | 3677 | return 0; |
2f2dc053 SW |
3678 | } |
3679 | ||
3680 | /* | |
3681 | * Wait for safe replies on open mds requests. If we time out, drop | |
3682 | * all requests from the tree to avoid dangling dentry refs. | |
3683 | */ | |
3684 | static void wait_requests(struct ceph_mds_client *mdsc) | |
3685 | { | |
a319bf56 | 3686 | struct ceph_options *opts = mdsc->fsc->client->options; |
2f2dc053 | 3687 | struct ceph_mds_request *req; |
2f2dc053 SW |
3688 | |
3689 | mutex_lock(&mdsc->mutex); | |
44ca18f2 | 3690 | if (__get_oldest_req(mdsc)) { |
2f2dc053 | 3691 | mutex_unlock(&mdsc->mutex); |
44ca18f2 | 3692 | |
2f2dc053 SW |
3693 | dout("wait_requests waiting for requests\n"); |
3694 | wait_for_completion_timeout(&mdsc->safe_umount_waiters, | |
a319bf56 | 3695 | ceph_timeout_jiffies(opts->mount_timeout)); |
2f2dc053 SW |
3696 | |
3697 | /* tear down remaining requests */ | |
44ca18f2 SW |
3698 | mutex_lock(&mdsc->mutex); |
3699 | while ((req = __get_oldest_req(mdsc))) { | |
2f2dc053 SW |
3700 | dout("wait_requests timed out on tid %llu\n", |
3701 | req->r_tid); | |
44ca18f2 | 3702 | __unregister_request(mdsc, req); |
2f2dc053 SW |
3703 | } |
3704 | } | |
3705 | mutex_unlock(&mdsc->mutex); | |
3706 | dout("wait_requests done\n"); | |
3707 | } | |
3708 | ||
3709 | /* | |
3710 | * called before mount is ro, and before dentries are torn down. | |
3711 | * (hmm, does this still race with new lookups?) | |
3712 | */ | |
3713 | void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc) | |
3714 | { | |
3715 | dout("pre_umount\n"); | |
3716 | mdsc->stopping = 1; | |
3717 | ||
7aac453a | 3718 | lock_unlock_sessions(mdsc); |
afcdaea3 | 3719 | ceph_flush_dirty_caps(mdsc); |
2f2dc053 | 3720 | wait_requests(mdsc); |
17c688c3 SW |
3721 | |
3722 | /* | |
3723 | * wait for reply handlers to drop their request refs and | |
3724 | * their inode/dcache refs | |
3725 | */ | |
3726 | ceph_msgr_flush(); | |
2f2dc053 SW |
3727 | } |
3728 | ||
3729 | /* | |
3730 | * wait for all write mds requests to flush. | |
3731 | */ | |
3732 | static void wait_unsafe_requests(struct ceph_mds_client *mdsc, u64 want_tid) | |
3733 | { | |
80fc7314 | 3734 | struct ceph_mds_request *req = NULL, *nextreq; |
44ca18f2 | 3735 | struct rb_node *n; |
2f2dc053 SW |
3736 | |
3737 | mutex_lock(&mdsc->mutex); | |
3738 | dout("wait_unsafe_requests want %lld\n", want_tid); | |
80fc7314 | 3739 | restart: |
44ca18f2 SW |
3740 | req = __get_oldest_req(mdsc); |
3741 | while (req && req->r_tid <= want_tid) { | |
80fc7314 SW |
3742 | /* find next request */ |
3743 | n = rb_next(&req->r_node); | |
3744 | if (n) | |
3745 | nextreq = rb_entry(n, struct ceph_mds_request, r_node); | |
3746 | else | |
3747 | nextreq = NULL; | |
e8a7b8b1 YZ |
3748 | if (req->r_op != CEPH_MDS_OP_SETFILELOCK && |
3749 | (req->r_op & CEPH_MDS_OP_WRITE)) { | |
44ca18f2 SW |
3750 | /* write op */ |
3751 | ceph_mdsc_get_request(req); | |
80fc7314 SW |
3752 | if (nextreq) |
3753 | ceph_mdsc_get_request(nextreq); | |
44ca18f2 SW |
3754 | mutex_unlock(&mdsc->mutex); |
3755 | dout("wait_unsafe_requests wait on %llu (want %llu)\n", | |
3756 | req->r_tid, want_tid); | |
3757 | wait_for_completion(&req->r_safe_completion); | |
3758 | mutex_lock(&mdsc->mutex); | |
44ca18f2 | 3759 | ceph_mdsc_put_request(req); |
80fc7314 SW |
3760 | if (!nextreq) |
3761 | break; /* next dne before, so we're done! */ | |
3762 | if (RB_EMPTY_NODE(&nextreq->r_node)) { | |
3763 | /* next request was removed from tree */ | |
3764 | ceph_mdsc_put_request(nextreq); | |
3765 | goto restart; | |
3766 | } | |
3767 | ceph_mdsc_put_request(nextreq); /* won't go away */ | |
44ca18f2 | 3768 | } |
80fc7314 | 3769 | req = nextreq; |
2f2dc053 SW |
3770 | } |
3771 | mutex_unlock(&mdsc->mutex); | |
3772 | dout("wait_unsafe_requests done\n"); | |
3773 | } | |
3774 | ||
3775 | void ceph_mdsc_sync(struct ceph_mds_client *mdsc) | |
3776 | { | |
0e294387 | 3777 | u64 want_tid, want_flush; |
2f2dc053 | 3778 | |
52953d55 | 3779 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) |
56b7cf95 SW |
3780 | return; |
3781 | ||
2f2dc053 SW |
3782 | dout("sync\n"); |
3783 | mutex_lock(&mdsc->mutex); | |
3784 | want_tid = mdsc->last_tid; | |
2f2dc053 | 3785 | mutex_unlock(&mdsc->mutex); |
2f2dc053 | 3786 | |
afcdaea3 | 3787 | ceph_flush_dirty_caps(mdsc); |
d3383a8e | 3788 | spin_lock(&mdsc->cap_dirty_lock); |
8310b089 | 3789 | want_flush = mdsc->last_cap_flush_tid; |
c8799fc4 YZ |
3790 | if (!list_empty(&mdsc->cap_flush_list)) { |
3791 | struct ceph_cap_flush *cf = | |
3792 | list_last_entry(&mdsc->cap_flush_list, | |
3793 | struct ceph_cap_flush, g_list); | |
3794 | cf->wake = true; | |
3795 | } | |
d3383a8e YZ |
3796 | spin_unlock(&mdsc->cap_dirty_lock); |
3797 | ||
0e294387 YZ |
3798 | dout("sync want tid %lld flush_seq %lld\n", |
3799 | want_tid, want_flush); | |
2f2dc053 SW |
3800 | |
3801 | wait_unsafe_requests(mdsc, want_tid); | |
0e294387 | 3802 | wait_caps_flush(mdsc, want_flush); |
2f2dc053 SW |
3803 | } |
3804 | ||
f3c60c59 SW |
3805 | /* |
3806 | * true if all sessions are closed, or we force unmount | |
3807 | */ | |
fcff415c | 3808 | static bool done_closing_sessions(struct ceph_mds_client *mdsc, int skipped) |
f3c60c59 | 3809 | { |
52953d55 | 3810 | if (READ_ONCE(mdsc->fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) |
f3c60c59 | 3811 | return true; |
fcff415c | 3812 | return atomic_read(&mdsc->num_sessions) <= skipped; |
f3c60c59 | 3813 | } |
2f2dc053 SW |
3814 | |
3815 | /* | |
3816 | * called after sb is ro. | |
3817 | */ | |
3818 | void ceph_mdsc_close_sessions(struct ceph_mds_client *mdsc) | |
3819 | { | |
a319bf56 | 3820 | struct ceph_options *opts = mdsc->fsc->client->options; |
2f2dc053 SW |
3821 | struct ceph_mds_session *session; |
3822 | int i; | |
fcff415c | 3823 | int skipped = 0; |
2f2dc053 SW |
3824 | |
3825 | dout("close_sessions\n"); | |
3826 | ||
2f2dc053 | 3827 | /* close sessions */ |
f3c60c59 SW |
3828 | mutex_lock(&mdsc->mutex); |
3829 | for (i = 0; i < mdsc->max_sessions; i++) { | |
3830 | session = __ceph_lookup_mds_session(mdsc, i); | |
3831 | if (!session) | |
3832 | continue; | |
2f2dc053 | 3833 | mutex_unlock(&mdsc->mutex); |
f3c60c59 | 3834 | mutex_lock(&session->s_mutex); |
fcff415c YZ |
3835 | if (__close_session(mdsc, session) <= 0) |
3836 | skipped++; | |
f3c60c59 SW |
3837 | mutex_unlock(&session->s_mutex); |
3838 | ceph_put_mds_session(session); | |
2f2dc053 SW |
3839 | mutex_lock(&mdsc->mutex); |
3840 | } | |
f3c60c59 SW |
3841 | mutex_unlock(&mdsc->mutex); |
3842 | ||
3843 | dout("waiting for sessions to close\n"); | |
fcff415c YZ |
3844 | wait_event_timeout(mdsc->session_close_wq, |
3845 | done_closing_sessions(mdsc, skipped), | |
a319bf56 | 3846 | ceph_timeout_jiffies(opts->mount_timeout)); |
2f2dc053 SW |
3847 | |
3848 | /* tear down remaining sessions */ | |
f3c60c59 | 3849 | mutex_lock(&mdsc->mutex); |
2f2dc053 SW |
3850 | for (i = 0; i < mdsc->max_sessions; i++) { |
3851 | if (mdsc->sessions[i]) { | |
3852 | session = get_session(mdsc->sessions[i]); | |
2600d2dd | 3853 | __unregister_session(mdsc, session); |
2f2dc053 SW |
3854 | mutex_unlock(&mdsc->mutex); |
3855 | mutex_lock(&session->s_mutex); | |
3856 | remove_session_caps(session); | |
3857 | mutex_unlock(&session->s_mutex); | |
3858 | ceph_put_mds_session(session); | |
3859 | mutex_lock(&mdsc->mutex); | |
3860 | } | |
3861 | } | |
2f2dc053 | 3862 | WARN_ON(!list_empty(&mdsc->cap_delay_list)); |
2f2dc053 SW |
3863 | mutex_unlock(&mdsc->mutex); |
3864 | ||
3865 | ceph_cleanup_empty_realms(mdsc); | |
3866 | ||
3867 | cancel_delayed_work_sync(&mdsc->delayed_work); /* cancel timer */ | |
3868 | ||
3869 | dout("stopped\n"); | |
3870 | } | |
3871 | ||
48fec5d0 YZ |
3872 | void ceph_mdsc_force_umount(struct ceph_mds_client *mdsc) |
3873 | { | |
3874 | struct ceph_mds_session *session; | |
3875 | int mds; | |
3876 | ||
3877 | dout("force umount\n"); | |
3878 | ||
3879 | mutex_lock(&mdsc->mutex); | |
3880 | for (mds = 0; mds < mdsc->max_sessions; mds++) { | |
3881 | session = __ceph_lookup_mds_session(mdsc, mds); | |
3882 | if (!session) | |
3883 | continue; | |
3884 | mutex_unlock(&mdsc->mutex); | |
3885 | mutex_lock(&session->s_mutex); | |
3886 | __close_session(mdsc, session); | |
3887 | if (session->s_state == CEPH_MDS_SESSION_CLOSING) { | |
3888 | cleanup_session_requests(mdsc, session); | |
3889 | remove_session_caps(session); | |
3890 | } | |
3891 | mutex_unlock(&session->s_mutex); | |
3892 | ceph_put_mds_session(session); | |
3893 | mutex_lock(&mdsc->mutex); | |
3894 | kick_requests(mdsc, mds); | |
3895 | } | |
3896 | __wake_requests(mdsc, &mdsc->waiting_for_map); | |
3897 | mutex_unlock(&mdsc->mutex); | |
3898 | } | |
3899 | ||
3d14c5d2 | 3900 | static void ceph_mdsc_stop(struct ceph_mds_client *mdsc) |
2f2dc053 SW |
3901 | { |
3902 | dout("stop\n"); | |
3903 | cancel_delayed_work_sync(&mdsc->delayed_work); /* cancel timer */ | |
3904 | if (mdsc->mdsmap) | |
3905 | ceph_mdsmap_destroy(mdsc->mdsmap); | |
3906 | kfree(mdsc->sessions); | |
37151668 | 3907 | ceph_caps_finalize(mdsc); |
10183a69 | 3908 | ceph_pool_perm_destroy(mdsc); |
2f2dc053 SW |
3909 | } |
3910 | ||
3d14c5d2 YS |
3911 | void ceph_mdsc_destroy(struct ceph_fs_client *fsc) |
3912 | { | |
3913 | struct ceph_mds_client *mdsc = fsc->mdsc; | |
ef550f6f | 3914 | dout("mdsc_destroy %p\n", mdsc); |
ef550f6f | 3915 | |
50c55aec CX |
3916 | if (!mdsc) |
3917 | return; | |
3918 | ||
ef550f6f SW |
3919 | /* flush out any connection work with references to us */ |
3920 | ceph_msgr_flush(); | |
3921 | ||
62a65f36 YZ |
3922 | ceph_mdsc_stop(mdsc); |
3923 | ||
3d14c5d2 YS |
3924 | fsc->mdsc = NULL; |
3925 | kfree(mdsc); | |
ef550f6f | 3926 | dout("mdsc_destroy %p done\n", mdsc); |
3d14c5d2 YS |
3927 | } |
3928 | ||
430afbad YZ |
3929 | void ceph_mdsc_handle_fsmap(struct ceph_mds_client *mdsc, struct ceph_msg *msg) |
3930 | { | |
3931 | struct ceph_fs_client *fsc = mdsc->fsc; | |
3932 | const char *mds_namespace = fsc->mount_options->mds_namespace; | |
3933 | void *p = msg->front.iov_base; | |
3934 | void *end = p + msg->front.iov_len; | |
3935 | u32 epoch; | |
3936 | u32 map_len; | |
3937 | u32 num_fs; | |
3938 | u32 mount_fscid = (u32)-1; | |
3939 | u8 struct_v, struct_cv; | |
3940 | int err = -EINVAL; | |
3941 | ||
3942 | ceph_decode_need(&p, end, sizeof(u32), bad); | |
3943 | epoch = ceph_decode_32(&p); | |
3944 | ||
3945 | dout("handle_fsmap epoch %u\n", epoch); | |
3946 | ||
3947 | ceph_decode_need(&p, end, 2 + sizeof(u32), bad); | |
3948 | struct_v = ceph_decode_8(&p); | |
3949 | struct_cv = ceph_decode_8(&p); | |
3950 | map_len = ceph_decode_32(&p); | |
3951 | ||
3952 | ceph_decode_need(&p, end, sizeof(u32) * 3, bad); | |
3953 | p += sizeof(u32) * 2; /* skip epoch and legacy_client_fscid */ | |
3954 | ||
3955 | num_fs = ceph_decode_32(&p); | |
3956 | while (num_fs-- > 0) { | |
3957 | void *info_p, *info_end; | |
3958 | u32 info_len; | |
3959 | u8 info_v, info_cv; | |
3960 | u32 fscid, namelen; | |
3961 | ||
3962 | ceph_decode_need(&p, end, 2 + sizeof(u32), bad); | |
3963 | info_v = ceph_decode_8(&p); | |
3964 | info_cv = ceph_decode_8(&p); | |
3965 | info_len = ceph_decode_32(&p); | |
3966 | ceph_decode_need(&p, end, info_len, bad); | |
3967 | info_p = p; | |
3968 | info_end = p + info_len; | |
3969 | p = info_end; | |
3970 | ||
3971 | ceph_decode_need(&info_p, info_end, sizeof(u32) * 2, bad); | |
3972 | fscid = ceph_decode_32(&info_p); | |
3973 | namelen = ceph_decode_32(&info_p); | |
3974 | ceph_decode_need(&info_p, info_end, namelen, bad); | |
3975 | ||
3976 | if (mds_namespace && | |
3977 | strlen(mds_namespace) == namelen && | |
3978 | !strncmp(mds_namespace, (char *)info_p, namelen)) { | |
3979 | mount_fscid = fscid; | |
3980 | break; | |
3981 | } | |
3982 | } | |
3983 | ||
3984 | ceph_monc_got_map(&fsc->client->monc, CEPH_SUB_FSMAP, epoch); | |
3985 | if (mount_fscid != (u32)-1) { | |
3986 | fsc->client->monc.fs_cluster_id = mount_fscid; | |
3987 | ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP, | |
3988 | 0, true); | |
3989 | ceph_monc_renew_subs(&fsc->client->monc); | |
3990 | } else { | |
3991 | err = -ENOENT; | |
3992 | goto err_out; | |
3993 | } | |
3994 | return; | |
76bd6ec4 | 3995 | |
430afbad YZ |
3996 | bad: |
3997 | pr_err("error decoding fsmap\n"); | |
3998 | err_out: | |
3999 | mutex_lock(&mdsc->mutex); | |
76bd6ec4 | 4000 | mdsc->mdsmap_err = err; |
430afbad YZ |
4001 | __wake_requests(mdsc, &mdsc->waiting_for_map); |
4002 | mutex_unlock(&mdsc->mutex); | |
430afbad | 4003 | } |
2f2dc053 SW |
4004 | |
4005 | /* | |
4006 | * handle mds map update. | |
4007 | */ | |
430afbad | 4008 | void ceph_mdsc_handle_mdsmap(struct ceph_mds_client *mdsc, struct ceph_msg *msg) |
2f2dc053 SW |
4009 | { |
4010 | u32 epoch; | |
4011 | u32 maplen; | |
4012 | void *p = msg->front.iov_base; | |
4013 | void *end = p + msg->front.iov_len; | |
4014 | struct ceph_mdsmap *newmap, *oldmap; | |
4015 | struct ceph_fsid fsid; | |
4016 | int err = -EINVAL; | |
4017 | ||
4018 | ceph_decode_need(&p, end, sizeof(fsid)+2*sizeof(u32), bad); | |
4019 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
3d14c5d2 | 4020 | if (ceph_check_fsid(mdsc->fsc->client, &fsid) < 0) |
0743304d | 4021 | return; |
c89136ea SW |
4022 | epoch = ceph_decode_32(&p); |
4023 | maplen = ceph_decode_32(&p); | |
2f2dc053 SW |
4024 | dout("handle_map epoch %u len %d\n", epoch, (int)maplen); |
4025 | ||
4026 | /* do we need it? */ | |
2f2dc053 SW |
4027 | mutex_lock(&mdsc->mutex); |
4028 | if (mdsc->mdsmap && epoch <= mdsc->mdsmap->m_epoch) { | |
4029 | dout("handle_map epoch %u <= our %u\n", | |
4030 | epoch, mdsc->mdsmap->m_epoch); | |
4031 | mutex_unlock(&mdsc->mutex); | |
4032 | return; | |
4033 | } | |
4034 | ||
4035 | newmap = ceph_mdsmap_decode(&p, end); | |
4036 | if (IS_ERR(newmap)) { | |
4037 | err = PTR_ERR(newmap); | |
4038 | goto bad_unlock; | |
4039 | } | |
4040 | ||
4041 | /* swap into place */ | |
4042 | if (mdsc->mdsmap) { | |
4043 | oldmap = mdsc->mdsmap; | |
4044 | mdsc->mdsmap = newmap; | |
4045 | check_new_map(mdsc, newmap, oldmap); | |
4046 | ceph_mdsmap_destroy(oldmap); | |
4047 | } else { | |
4048 | mdsc->mdsmap = newmap; /* first mds map */ | |
4049 | } | |
719784ba CX |
4050 | mdsc->fsc->max_file_size = min((loff_t)mdsc->mdsmap->m_max_file_size, |
4051 | MAX_LFS_FILESIZE); | |
2f2dc053 SW |
4052 | |
4053 | __wake_requests(mdsc, &mdsc->waiting_for_map); | |
82dcabad ID |
4054 | ceph_monc_got_map(&mdsc->fsc->client->monc, CEPH_SUB_MDSMAP, |
4055 | mdsc->mdsmap->m_epoch); | |
2f2dc053 SW |
4056 | |
4057 | mutex_unlock(&mdsc->mutex); | |
4058 | schedule_delayed(mdsc); | |
4059 | return; | |
4060 | ||
4061 | bad_unlock: | |
4062 | mutex_unlock(&mdsc->mutex); | |
4063 | bad: | |
4064 | pr_err("error decoding mdsmap %d\n", err); | |
4065 | return; | |
4066 | } | |
4067 | ||
4068 | static struct ceph_connection *con_get(struct ceph_connection *con) | |
4069 | { | |
4070 | struct ceph_mds_session *s = con->private; | |
4071 | ||
4072 | if (get_session(s)) { | |
3997c01d | 4073 | dout("mdsc con_get %p ok (%d)\n", s, refcount_read(&s->s_ref)); |
2f2dc053 SW |
4074 | return con; |
4075 | } | |
4076 | dout("mdsc con_get %p FAIL\n", s); | |
4077 | return NULL; | |
4078 | } | |
4079 | ||
4080 | static void con_put(struct ceph_connection *con) | |
4081 | { | |
4082 | struct ceph_mds_session *s = con->private; | |
4083 | ||
3997c01d | 4084 | dout("mdsc con_put %p (%d)\n", s, refcount_read(&s->s_ref) - 1); |
2f2dc053 SW |
4085 | ceph_put_mds_session(s); |
4086 | } | |
4087 | ||
4088 | /* | |
4089 | * if the client is unresponsive for long enough, the mds will kill | |
4090 | * the session entirely. | |
4091 | */ | |
4092 | static void peer_reset(struct ceph_connection *con) | |
4093 | { | |
4094 | struct ceph_mds_session *s = con->private; | |
7e70f0ed | 4095 | struct ceph_mds_client *mdsc = s->s_mdsc; |
2f2dc053 | 4096 | |
f3ae1b97 | 4097 | pr_warn("mds%d closed our session\n", s->s_mds); |
7e70f0ed | 4098 | send_mds_reconnect(mdsc, s); |
2f2dc053 SW |
4099 | } |
4100 | ||
4101 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
4102 | { | |
4103 | struct ceph_mds_session *s = con->private; | |
4104 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
4105 | int type = le16_to_cpu(msg->hdr.type); | |
4106 | ||
2600d2dd SW |
4107 | mutex_lock(&mdsc->mutex); |
4108 | if (__verify_registered_session(mdsc, s) < 0) { | |
4109 | mutex_unlock(&mdsc->mutex); | |
4110 | goto out; | |
4111 | } | |
4112 | mutex_unlock(&mdsc->mutex); | |
4113 | ||
2f2dc053 SW |
4114 | switch (type) { |
4115 | case CEPH_MSG_MDS_MAP: | |
430afbad YZ |
4116 | ceph_mdsc_handle_mdsmap(mdsc, msg); |
4117 | break; | |
4118 | case CEPH_MSG_FS_MAP_USER: | |
4119 | ceph_mdsc_handle_fsmap(mdsc, msg); | |
2f2dc053 SW |
4120 | break; |
4121 | case CEPH_MSG_CLIENT_SESSION: | |
4122 | handle_session(s, msg); | |
4123 | break; | |
4124 | case CEPH_MSG_CLIENT_REPLY: | |
4125 | handle_reply(s, msg); | |
4126 | break; | |
4127 | case CEPH_MSG_CLIENT_REQUEST_FORWARD: | |
2600d2dd | 4128 | handle_forward(mdsc, s, msg); |
2f2dc053 SW |
4129 | break; |
4130 | case CEPH_MSG_CLIENT_CAPS: | |
4131 | ceph_handle_caps(s, msg); | |
4132 | break; | |
4133 | case CEPH_MSG_CLIENT_SNAP: | |
2600d2dd | 4134 | ceph_handle_snap(mdsc, s, msg); |
2f2dc053 SW |
4135 | break; |
4136 | case CEPH_MSG_CLIENT_LEASE: | |
2600d2dd | 4137 | handle_lease(mdsc, s, msg); |
2f2dc053 | 4138 | break; |
fb18a575 LH |
4139 | case CEPH_MSG_CLIENT_QUOTA: |
4140 | ceph_handle_quota(mdsc, s, msg); | |
4141 | break; | |
2f2dc053 SW |
4142 | |
4143 | default: | |
4144 | pr_err("received unknown message type %d %s\n", type, | |
4145 | ceph_msg_type_name(type)); | |
4146 | } | |
2600d2dd | 4147 | out: |
2f2dc053 SW |
4148 | ceph_msg_put(msg); |
4149 | } | |
4150 | ||
4e7a5dcd SW |
4151 | /* |
4152 | * authentication | |
4153 | */ | |
a3530df3 AE |
4154 | |
4155 | /* | |
4156 | * Note: returned pointer is the address of a structure that's | |
4157 | * managed separately. Caller must *not* attempt to free it. | |
4158 | */ | |
4159 | static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, | |
8f43fb53 | 4160 | int *proto, int force_new) |
4e7a5dcd SW |
4161 | { |
4162 | struct ceph_mds_session *s = con->private; | |
4163 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
3d14c5d2 | 4164 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; |
74f1869f | 4165 | struct ceph_auth_handshake *auth = &s->s_auth; |
4e7a5dcd | 4166 | |
74f1869f | 4167 | if (force_new && auth->authorizer) { |
6c1ea260 | 4168 | ceph_auth_destroy_authorizer(auth->authorizer); |
74f1869f | 4169 | auth->authorizer = NULL; |
4e7a5dcd | 4170 | } |
27859f97 SW |
4171 | if (!auth->authorizer) { |
4172 | int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_MDS, | |
4173 | auth); | |
0bed9b5c SW |
4174 | if (ret) |
4175 | return ERR_PTR(ret); | |
27859f97 SW |
4176 | } else { |
4177 | int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_MDS, | |
4178 | auth); | |
a255651d | 4179 | if (ret) |
a3530df3 | 4180 | return ERR_PTR(ret); |
4e7a5dcd | 4181 | } |
4e7a5dcd | 4182 | *proto = ac->protocol; |
74f1869f | 4183 | |
a3530df3 | 4184 | return auth; |
4e7a5dcd SW |
4185 | } |
4186 | ||
6daca13d ID |
4187 | static int add_authorizer_challenge(struct ceph_connection *con, |
4188 | void *challenge_buf, int challenge_buf_len) | |
4189 | { | |
4190 | struct ceph_mds_session *s = con->private; | |
4191 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
4192 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; | |
4193 | ||
4194 | return ceph_auth_add_authorizer_challenge(ac, s->s_auth.authorizer, | |
4195 | challenge_buf, challenge_buf_len); | |
4196 | } | |
4e7a5dcd | 4197 | |
0dde5848 | 4198 | static int verify_authorizer_reply(struct ceph_connection *con) |
4e7a5dcd SW |
4199 | { |
4200 | struct ceph_mds_session *s = con->private; | |
4201 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
3d14c5d2 | 4202 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; |
4e7a5dcd | 4203 | |
0dde5848 | 4204 | return ceph_auth_verify_authorizer_reply(ac, s->s_auth.authorizer); |
4e7a5dcd SW |
4205 | } |
4206 | ||
9bd2e6f8 SW |
4207 | static int invalidate_authorizer(struct ceph_connection *con) |
4208 | { | |
4209 | struct ceph_mds_session *s = con->private; | |
4210 | struct ceph_mds_client *mdsc = s->s_mdsc; | |
3d14c5d2 | 4211 | struct ceph_auth_client *ac = mdsc->fsc->client->monc.auth; |
9bd2e6f8 | 4212 | |
27859f97 | 4213 | ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_MDS); |
9bd2e6f8 | 4214 | |
3d14c5d2 | 4215 | return ceph_monc_validate_auth(&mdsc->fsc->client->monc); |
9bd2e6f8 SW |
4216 | } |
4217 | ||
53ded495 AE |
4218 | static struct ceph_msg *mds_alloc_msg(struct ceph_connection *con, |
4219 | struct ceph_msg_header *hdr, int *skip) | |
4220 | { | |
4221 | struct ceph_msg *msg; | |
4222 | int type = (int) le16_to_cpu(hdr->type); | |
4223 | int front_len = (int) le32_to_cpu(hdr->front_len); | |
4224 | ||
4225 | if (con->in_msg) | |
4226 | return con->in_msg; | |
4227 | ||
4228 | *skip = 0; | |
4229 | msg = ceph_msg_new(type, front_len, GFP_NOFS, false); | |
4230 | if (!msg) { | |
4231 | pr_err("unable to allocate msg type %d len %d\n", | |
4232 | type, front_len); | |
4233 | return NULL; | |
4234 | } | |
53ded495 AE |
4235 | |
4236 | return msg; | |
4237 | } | |
4238 | ||
79dbd1ba | 4239 | static int mds_sign_message(struct ceph_msg *msg) |
33d07337 | 4240 | { |
79dbd1ba | 4241 | struct ceph_mds_session *s = msg->con->private; |
33d07337 | 4242 | struct ceph_auth_handshake *auth = &s->s_auth; |
79dbd1ba | 4243 | |
33d07337 YZ |
4244 | return ceph_auth_sign_message(auth, msg); |
4245 | } | |
4246 | ||
79dbd1ba | 4247 | static int mds_check_message_signature(struct ceph_msg *msg) |
33d07337 | 4248 | { |
79dbd1ba | 4249 | struct ceph_mds_session *s = msg->con->private; |
33d07337 | 4250 | struct ceph_auth_handshake *auth = &s->s_auth; |
79dbd1ba | 4251 | |
33d07337 YZ |
4252 | return ceph_auth_check_message_signature(auth, msg); |
4253 | } | |
4254 | ||
9e32789f | 4255 | static const struct ceph_connection_operations mds_con_ops = { |
2f2dc053 SW |
4256 | .get = con_get, |
4257 | .put = con_put, | |
4258 | .dispatch = dispatch, | |
4e7a5dcd | 4259 | .get_authorizer = get_authorizer, |
6daca13d | 4260 | .add_authorizer_challenge = add_authorizer_challenge, |
4e7a5dcd | 4261 | .verify_authorizer_reply = verify_authorizer_reply, |
9bd2e6f8 | 4262 | .invalidate_authorizer = invalidate_authorizer, |
2f2dc053 | 4263 | .peer_reset = peer_reset, |
53ded495 | 4264 | .alloc_msg = mds_alloc_msg, |
79dbd1ba ID |
4265 | .sign_message = mds_sign_message, |
4266 | .check_message_signature = mds_check_message_signature, | |
2f2dc053 SW |
4267 | }; |
4268 | ||
2f2dc053 | 4269 | /* eof */ |