Commit | Line | Data |
---|---|---|
d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License version 2 for more details (a copy is included | |
14 | * in the LICENSE file that accompanied this code). | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * version 2 along with this program; If not, see | |
18 | * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf | |
19 | * | |
20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
21 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
22 | * have any questions. | |
23 | * | |
24 | * GPL HEADER END | |
25 | */ | |
26 | /* | |
27 | * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
29 | * | |
30 | * Copyright (c) 2011, 2012, Intel Corporation. | |
31 | */ | |
32 | /* | |
33 | * This file is part of Lustre, http://www.lustre.org/ | |
34 | * Lustre is a trademark of Sun Microsystems, Inc. | |
35 | * | |
36 | * lustre/mgc/mgc_request.c | |
37 | * | |
38 | * Author: Nathan Rutman <nathan@clusterfs.com> | |
39 | */ | |
40 | ||
41 | #define DEBUG_SUBSYSTEM S_MGC | |
42 | #define D_MGC D_CONFIG /*|D_WARNING*/ | |
43 | ||
aa4e3c8a | 44 | #include <linux/module.h> |
73060ed9 GKH |
45 | #include "../include/obd_class.h" |
46 | #include "../include/lustre_dlm.h" | |
47 | #include "../include/lprocfs_status.h" | |
48 | #include "../include/lustre_log.h" | |
49 | #include "../include/lustre_disk.h" | |
aa4e3c8a | 50 | |
d7e09d03 PT |
51 | #include "mgc_internal.h" |
52 | ||
53 | static int mgc_name2resid(char *name, int len, struct ldlm_res_id *res_id, | |
54 | int type) | |
55 | { | |
56 | __u64 resname = 0; | |
57 | ||
7d4bae45 | 58 | if (len > sizeof(resname)) { |
d7e09d03 PT |
59 | CERROR("name too long: %s\n", name); |
60 | return -EINVAL; | |
61 | } | |
62 | if (len <= 0) { | |
63 | CERROR("missing name: %s\n", name); | |
64 | return -EINVAL; | |
65 | } | |
66 | memcpy(&resname, name, len); | |
67 | ||
68 | /* Always use the same endianness for the resid */ | |
69 | memset(res_id, 0, sizeof(*res_id)); | |
70 | res_id->name[0] = cpu_to_le64(resname); | |
71 | /* XXX: unfortunately, sptlprc and config llog share one lock */ | |
37821997 | 72 | switch (type) { |
d7e09d03 PT |
73 | case CONFIG_T_CONFIG: |
74 | case CONFIG_T_SPTLRPC: | |
75 | resname = 0; | |
76 | break; | |
77 | case CONFIG_T_RECOVER: | |
7d4bae45 | 78 | case CONFIG_T_PARAMS: |
d7e09d03 PT |
79 | resname = type; |
80 | break; | |
81 | default: | |
82 | LBUG(); | |
83 | } | |
84 | res_id->name[1] = cpu_to_le64(resname); | |
55f5a824 | 85 | CDEBUG(D_MGC, "log %s to resid %#llx/%#llx (%.8s)\n", name, |
d7e09d03 PT |
86 | res_id->name[0], res_id->name[1], (char *)&res_id->name[0]); |
87 | return 0; | |
88 | } | |
89 | ||
90 | int mgc_fsname2resid(char *fsname, struct ldlm_res_id *res_id, int type) | |
91 | { | |
92 | /* fsname is at most 8 chars long, maybe contain "-". | |
93 | * e.g. "lustre", "SUN-000" */ | |
94 | return mgc_name2resid(fsname, strlen(fsname), res_id, type); | |
95 | } | |
96 | EXPORT_SYMBOL(mgc_fsname2resid); | |
97 | ||
0bf31f07 | 98 | static int mgc_logname2resid(char *logname, struct ldlm_res_id *res_id, int type) |
d7e09d03 PT |
99 | { |
100 | char *name_end; | |
101 | int len; | |
102 | ||
103 | /* logname consists of "fsname-nodetype". | |
7d4bae45 AB |
104 | * e.g. "lustre-MDT0001", "SUN-000-client" |
105 | * there is an exception: llog "params" */ | |
d7e09d03 | 106 | name_end = strrchr(logname, '-'); |
7d4bae45 AB |
107 | if (!name_end) |
108 | len = strlen(logname); | |
109 | else | |
110 | len = name_end - logname; | |
d7e09d03 PT |
111 | return mgc_name2resid(logname, len, res_id, type); |
112 | } | |
113 | ||
114 | /********************** config llog list **********************/ | |
115 | static LIST_HEAD(config_llog_list); | |
116 | static DEFINE_SPINLOCK(config_list_lock); | |
117 | ||
118 | /* Take a reference to a config log */ | |
119 | static int config_log_get(struct config_llog_data *cld) | |
120 | { | |
d7e09d03 PT |
121 | atomic_inc(&cld->cld_refcount); |
122 | CDEBUG(D_INFO, "log %s refs %d\n", cld->cld_logname, | |
123 | atomic_read(&cld->cld_refcount)); | |
0a3bdb00 | 124 | return 0; |
d7e09d03 PT |
125 | } |
126 | ||
127 | /* Drop a reference to a config log. When no longer referenced, | |
128 | we can free the config log data */ | |
129 | static void config_log_put(struct config_llog_data *cld) | |
130 | { | |
d7e09d03 PT |
131 | CDEBUG(D_INFO, "log %s refs %d\n", cld->cld_logname, |
132 | atomic_read(&cld->cld_refcount)); | |
133 | LASSERT(atomic_read(&cld->cld_refcount) > 0); | |
134 | ||
135 | /* spinlock to make sure no item with 0 refcount in the list */ | |
136 | if (atomic_dec_and_lock(&cld->cld_refcount, &config_list_lock)) { | |
137 | list_del(&cld->cld_list_chain); | |
138 | spin_unlock(&config_list_lock); | |
139 | ||
140 | CDEBUG(D_MGC, "dropping config log %s\n", cld->cld_logname); | |
141 | ||
142 | if (cld->cld_recover) | |
143 | config_log_put(cld->cld_recover); | |
144 | if (cld->cld_sptlrpc) | |
145 | config_log_put(cld->cld_sptlrpc); | |
7d4bae45 AB |
146 | if (cld->cld_params) |
147 | config_log_put(cld->cld_params); | |
d7e09d03 PT |
148 | if (cld_is_sptlrpc(cld)) |
149 | sptlrpc_conf_log_stop(cld->cld_logname); | |
150 | ||
151 | class_export_put(cld->cld_mgcexp); | |
c9b4297f | 152 | kfree(cld); |
d7e09d03 | 153 | } |
d7e09d03 PT |
154 | } |
155 | ||
156 | /* Find a config log by name */ | |
157 | static | |
158 | struct config_llog_data *config_log_find(char *logname, | |
159 | struct config_llog_instance *cfg) | |
160 | { | |
161 | struct config_llog_data *cld; | |
162 | struct config_llog_data *found = NULL; | |
17fc7f9b | 163 | void *instance; |
d7e09d03 PT |
164 | |
165 | LASSERT(logname != NULL); | |
166 | ||
167 | instance = cfg ? cfg->cfg_instance : NULL; | |
168 | spin_lock(&config_list_lock); | |
169 | list_for_each_entry(cld, &config_llog_list, cld_list_chain) { | |
170 | /* check if instance equals */ | |
171 | if (instance != cld->cld_cfg.cfg_instance) | |
172 | continue; | |
173 | ||
174 | /* instance may be NULL, should check name */ | |
175 | if (strcmp(logname, cld->cld_logname) == 0) { | |
176 | found = cld; | |
177 | break; | |
178 | } | |
179 | } | |
180 | if (found) { | |
181 | atomic_inc(&found->cld_refcount); | |
182 | LASSERT(found->cld_stopping == 0 || cld_is_sptlrpc(found) == 0); | |
183 | } | |
184 | spin_unlock(&config_list_lock); | |
0a3bdb00 | 185 | return found; |
d7e09d03 PT |
186 | } |
187 | ||
188 | static | |
189 | struct config_llog_data *do_config_log_add(struct obd_device *obd, | |
190 | char *logname, | |
191 | int type, | |
192 | struct config_llog_instance *cfg, | |
193 | struct super_block *sb) | |
194 | { | |
195 | struct config_llog_data *cld; | |
196 | int rc; | |
d7e09d03 PT |
197 | |
198 | CDEBUG(D_MGC, "do adding config log %s:%p\n", logname, | |
ea7893bb | 199 | cfg ? cfg->cfg_instance : NULL); |
d7e09d03 | 200 | |
c9b4297f | 201 | cld = kzalloc(sizeof(*cld) + strlen(logname) + 1, GFP_NOFS); |
d7e09d03 | 202 | if (!cld) |
0a3bdb00 | 203 | return ERR_PTR(-ENOMEM); |
d7e09d03 PT |
204 | |
205 | strcpy(cld->cld_logname, logname); | |
206 | if (cfg) | |
207 | cld->cld_cfg = *cfg; | |
208 | else | |
209 | cld->cld_cfg.cfg_callback = class_config_llog_handler; | |
210 | mutex_init(&cld->cld_lock); | |
211 | cld->cld_cfg.cfg_last_idx = 0; | |
212 | cld->cld_cfg.cfg_flags = 0; | |
213 | cld->cld_cfg.cfg_sb = sb; | |
214 | cld->cld_type = type; | |
215 | atomic_set(&cld->cld_refcount, 1); | |
216 | ||
217 | /* Keep the mgc around until we are done */ | |
218 | cld->cld_mgcexp = class_export_get(obd->obd_self_export); | |
219 | ||
220 | if (cld_is_sptlrpc(cld)) { | |
221 | sptlrpc_conf_log_start(logname); | |
222 | cld->cld_cfg.cfg_obdname = obd->obd_name; | |
223 | } | |
224 | ||
225 | rc = mgc_logname2resid(logname, &cld->cld_resid, type); | |
226 | ||
227 | spin_lock(&config_list_lock); | |
228 | list_add(&cld->cld_list_chain, &config_llog_list); | |
229 | spin_unlock(&config_list_lock); | |
230 | ||
231 | if (rc) { | |
232 | config_log_put(cld); | |
0a3bdb00 | 233 | return ERR_PTR(rc); |
d7e09d03 PT |
234 | } |
235 | ||
236 | if (cld_is_sptlrpc(cld)) { | |
237 | rc = mgc_process_log(obd, cld); | |
238 | if (rc && rc != -ENOENT) | |
239 | CERROR("failed processing sptlrpc log: %d\n", rc); | |
240 | } | |
241 | ||
0a3bdb00 | 242 | return cld; |
d7e09d03 PT |
243 | } |
244 | ||
245 | static struct config_llog_data *config_recover_log_add(struct obd_device *obd, | |
246 | char *fsname, | |
247 | struct config_llog_instance *cfg, | |
248 | struct super_block *sb) | |
249 | { | |
250 | struct config_llog_instance lcfg = *cfg; | |
251 | struct lustre_sb_info *lsi = s2lsi(sb); | |
252 | struct config_llog_data *cld; | |
253 | char logname[32]; | |
254 | ||
255 | if (IS_OST(lsi)) | |
256 | return NULL; | |
257 | ||
258 | /* for osp-on-ost, see lustre_start_osp() */ | |
259 | if (IS_MDT(lsi) && lcfg.cfg_instance) | |
260 | return NULL; | |
261 | ||
262 | /* we have to use different llog for clients and mdts for cmd | |
263 | * where only clients are notified if one of cmd server restarts */ | |
264 | LASSERT(strlen(fsname) < sizeof(logname) / 2); | |
265 | strcpy(logname, fsname); | |
266 | if (IS_SERVER(lsi)) { /* mdt */ | |
267 | LASSERT(lcfg.cfg_instance == NULL); | |
268 | lcfg.cfg_instance = sb; | |
269 | strcat(logname, "-mdtir"); | |
270 | } else { | |
271 | LASSERT(lcfg.cfg_instance != NULL); | |
272 | strcat(logname, "-cliir"); | |
273 | } | |
274 | ||
275 | cld = do_config_log_add(obd, logname, CONFIG_T_RECOVER, &lcfg, sb); | |
276 | return cld; | |
277 | } | |
278 | ||
7d4bae45 AB |
279 | static struct config_llog_data *config_params_log_add(struct obd_device *obd, |
280 | struct config_llog_instance *cfg, struct super_block *sb) | |
281 | { | |
282 | struct config_llog_instance lcfg = *cfg; | |
283 | struct config_llog_data *cld; | |
284 | ||
285 | lcfg.cfg_instance = sb; | |
286 | ||
287 | cld = do_config_log_add(obd, PARAMS_FILENAME, CONFIG_T_PARAMS, | |
288 | &lcfg, sb); | |
289 | ||
290 | return cld; | |
291 | } | |
d7e09d03 PT |
292 | |
293 | /** Add this log to the list of active logs watched by an MGC. | |
294 | * Active means we're watching for updates. | |
295 | * We have one active log per "mount" - client instance or servername. | |
296 | * Each instance may be at a different point in the log. | |
297 | */ | |
298 | static int config_log_add(struct obd_device *obd, char *logname, | |
299 | struct config_llog_instance *cfg, | |
300 | struct super_block *sb) | |
301 | { | |
302 | struct lustre_sb_info *lsi = s2lsi(sb); | |
303 | struct config_llog_data *cld; | |
304 | struct config_llog_data *sptlrpc_cld; | |
7d4bae45 AB |
305 | struct config_llog_data *params_cld; |
306 | char seclogname[32]; | |
307 | char *ptr; | |
308 | int rc; | |
d7e09d03 PT |
309 | |
310 | CDEBUG(D_MGC, "adding config log %s:%p\n", logname, cfg->cfg_instance); | |
311 | ||
312 | /* | |
313 | * for each regular log, the depended sptlrpc log name is | |
314 | * <fsname>-sptlrpc. multiple regular logs may share one sptlrpc log. | |
315 | */ | |
316 | ptr = strrchr(logname, '-'); | |
317 | if (ptr == NULL || ptr - logname > 8) { | |
318 | CERROR("logname %s is too long\n", logname); | |
0a3bdb00 | 319 | return -EINVAL; |
d7e09d03 PT |
320 | } |
321 | ||
322 | memcpy(seclogname, logname, ptr - logname); | |
323 | strcpy(seclogname + (ptr - logname), "-sptlrpc"); | |
324 | ||
325 | sptlrpc_cld = config_log_find(seclogname, NULL); | |
326 | if (sptlrpc_cld == NULL) { | |
327 | sptlrpc_cld = do_config_log_add(obd, seclogname, | |
328 | CONFIG_T_SPTLRPC, NULL, NULL); | |
329 | if (IS_ERR(sptlrpc_cld)) { | |
330 | CERROR("can't create sptlrpc log: %s\n", seclogname); | |
74d3ba98 JL |
331 | rc = PTR_ERR(sptlrpc_cld); |
332 | goto out_err; | |
d7e09d03 PT |
333 | } |
334 | } | |
7d4bae45 AB |
335 | params_cld = config_params_log_add(obd, cfg, sb); |
336 | if (IS_ERR(params_cld)) { | |
337 | rc = PTR_ERR(params_cld); | |
338 | CERROR("%s: can't create params log: rc = %d\n", | |
339 | obd->obd_name, rc); | |
74d3ba98 | 340 | goto out_err1; |
7d4bae45 | 341 | } |
d7e09d03 PT |
342 | |
343 | cld = do_config_log_add(obd, logname, CONFIG_T_CONFIG, cfg, sb); | |
344 | if (IS_ERR(cld)) { | |
345 | CERROR("can't create log: %s\n", logname); | |
74d3ba98 JL |
346 | rc = PTR_ERR(cld); |
347 | goto out_err2; | |
d7e09d03 PT |
348 | } |
349 | ||
350 | cld->cld_sptlrpc = sptlrpc_cld; | |
7d4bae45 | 351 | cld->cld_params = params_cld; |
d7e09d03 PT |
352 | |
353 | LASSERT(lsi->lsi_lmd); | |
354 | if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)) { | |
355 | struct config_llog_data *recover_cld; | |
356 | *strrchr(seclogname, '-') = 0; | |
357 | recover_cld = config_recover_log_add(obd, seclogname, cfg, sb); | |
74d3ba98 JL |
358 | if (IS_ERR(recover_cld)) { |
359 | rc = PTR_ERR(recover_cld); | |
360 | goto out_err3; | |
361 | } | |
d7e09d03 PT |
362 | cld->cld_recover = recover_cld; |
363 | } | |
364 | ||
0a3bdb00 | 365 | return 0; |
7d4bae45 AB |
366 | |
367 | out_err3: | |
368 | config_log_put(cld); | |
369 | ||
370 | out_err2: | |
371 | config_log_put(params_cld); | |
372 | ||
373 | out_err1: | |
374 | config_log_put(sptlrpc_cld); | |
375 | ||
376 | out_err: | |
377 | return rc; | |
d7e09d03 PT |
378 | } |
379 | ||
380 | DEFINE_MUTEX(llog_process_lock); | |
381 | ||
382 | /** Stop watching for updates on this log. | |
383 | */ | |
384 | static int config_log_end(char *logname, struct config_llog_instance *cfg) | |
385 | { | |
386 | struct config_llog_data *cld; | |
387 | struct config_llog_data *cld_sptlrpc = NULL; | |
7d4bae45 | 388 | struct config_llog_data *cld_params = NULL; |
d7e09d03 PT |
389 | struct config_llog_data *cld_recover = NULL; |
390 | int rc = 0; | |
d7e09d03 PT |
391 | |
392 | cld = config_log_find(logname, cfg); | |
393 | if (cld == NULL) | |
0a3bdb00 | 394 | return -ENOENT; |
d7e09d03 PT |
395 | |
396 | mutex_lock(&cld->cld_lock); | |
397 | /* | |
398 | * if cld_stopping is set, it means we didn't start the log thus | |
399 | * not owning the start ref. this can happen after previous umount: | |
400 | * the cld still hanging there waiting for lock cancel, and we | |
401 | * remount again but failed in the middle and call log_end without | |
402 | * calling start_log. | |
403 | */ | |
404 | if (unlikely(cld->cld_stopping)) { | |
405 | mutex_unlock(&cld->cld_lock); | |
406 | /* drop the ref from the find */ | |
407 | config_log_put(cld); | |
0a3bdb00 | 408 | return rc; |
d7e09d03 PT |
409 | } |
410 | ||
411 | cld->cld_stopping = 1; | |
412 | ||
413 | cld_recover = cld->cld_recover; | |
414 | cld->cld_recover = NULL; | |
415 | mutex_unlock(&cld->cld_lock); | |
416 | ||
417 | if (cld_recover) { | |
418 | mutex_lock(&cld_recover->cld_lock); | |
419 | cld_recover->cld_stopping = 1; | |
420 | mutex_unlock(&cld_recover->cld_lock); | |
421 | config_log_put(cld_recover); | |
422 | } | |
423 | ||
424 | spin_lock(&config_list_lock); | |
425 | cld_sptlrpc = cld->cld_sptlrpc; | |
426 | cld->cld_sptlrpc = NULL; | |
7d4bae45 AB |
427 | cld_params = cld->cld_params; |
428 | cld->cld_params = NULL; | |
d7e09d03 PT |
429 | spin_unlock(&config_list_lock); |
430 | ||
431 | if (cld_sptlrpc) | |
432 | config_log_put(cld_sptlrpc); | |
433 | ||
7d4bae45 AB |
434 | if (cld_params) { |
435 | mutex_lock(&cld_params->cld_lock); | |
436 | cld_params->cld_stopping = 1; | |
437 | mutex_unlock(&cld_params->cld_lock); | |
438 | config_log_put(cld_params); | |
439 | } | |
440 | ||
d7e09d03 PT |
441 | /* drop the ref from the find */ |
442 | config_log_put(cld); | |
443 | /* drop the start ref */ | |
444 | config_log_put(cld); | |
445 | ||
446 | CDEBUG(D_MGC, "end config log %s (%d)\n", logname ? logname : "client", | |
447 | rc); | |
0a3bdb00 | 448 | return rc; |
d7e09d03 PT |
449 | } |
450 | ||
73bb1da6 | 451 | int lprocfs_mgc_rd_ir_state(struct seq_file *m, void *data) |
d7e09d03 PT |
452 | { |
453 | struct obd_device *obd = data; | |
1c8aa54a HZ |
454 | struct obd_import *imp; |
455 | struct obd_connect_data *ocd; | |
d7e09d03 | 456 | struct config_llog_data *cld; |
d7e09d03 | 457 | |
1c8aa54a HZ |
458 | LPROCFS_CLIMP_CHECK(obd); |
459 | imp = obd->u.cli.cl_import; | |
460 | ocd = &imp->imp_connect_data; | |
461 | ||
73bb1da6 | 462 | seq_printf(m, "imperative_recovery: %s\n", |
d7e09d03 | 463 | OCD_HAS_FLAG(ocd, IMP_RECOV) ? "ENABLED" : "DISABLED"); |
73bb1da6 | 464 | seq_printf(m, "client_state:\n"); |
d7e09d03 PT |
465 | |
466 | spin_lock(&config_list_lock); | |
467 | list_for_each_entry(cld, &config_llog_list, cld_list_chain) { | |
468 | if (cld->cld_recover == NULL) | |
469 | continue; | |
73bb1da6 | 470 | seq_printf(m, " - { client: %s, nidtbl_version: %u }\n", |
d7e09d03 PT |
471 | cld->cld_logname, |
472 | cld->cld_recover->cld_cfg.cfg_last_idx); | |
473 | } | |
474 | spin_unlock(&config_list_lock); | |
475 | ||
1c8aa54a | 476 | LPROCFS_CLIMP_EXIT(obd); |
0a3bdb00 | 477 | return 0; |
d7e09d03 PT |
478 | } |
479 | ||
480 | /* reenqueue any lost locks */ | |
481 | #define RQ_RUNNING 0x1 | |
482 | #define RQ_NOW 0x2 | |
483 | #define RQ_LATER 0x4 | |
484 | #define RQ_STOP 0x8 | |
4345abb2 | 485 | #define RQ_PRECLEANUP 0x10 |
225f597c | 486 | static int rq_state; |
d7e09d03 PT |
487 | static wait_queue_head_t rq_waitq; |
488 | static DECLARE_COMPLETION(rq_exit); | |
4345abb2 | 489 | static DECLARE_COMPLETION(rq_start); |
d7e09d03 PT |
490 | |
491 | static void do_requeue(struct config_llog_data *cld) | |
492 | { | |
d7e09d03 PT |
493 | LASSERT(atomic_read(&cld->cld_refcount) > 0); |
494 | ||
495 | /* Do not run mgc_process_log on a disconnected export or an | |
496 | export which is being disconnected. Take the client | |
497 | semaphore to make the check non-racy. */ | |
498 | down_read(&cld->cld_mgcexp->exp_obd->u.cli.cl_sem); | |
499 | if (cld->cld_mgcexp->exp_obd->u.cli.cl_conn_count != 0) { | |
500 | CDEBUG(D_MGC, "updating log %s\n", cld->cld_logname); | |
501 | mgc_process_log(cld->cld_mgcexp->exp_obd, cld); | |
502 | } else { | |
503 | CDEBUG(D_MGC, "disconnecting, won't update log %s\n", | |
504 | cld->cld_logname); | |
505 | } | |
506 | up_read(&cld->cld_mgcexp->exp_obd->u.cli.cl_sem); | |
d7e09d03 PT |
507 | } |
508 | ||
509 | /* this timeout represents how many seconds MGC should wait before | |
510 | * requeue config and recover lock to the MGS. We need to randomize this | |
511 | * in order to not flood the MGS. | |
512 | */ | |
513 | #define MGC_TIMEOUT_MIN_SECONDS 5 | |
514 | #define MGC_TIMEOUT_RAND_CENTISEC 0x1ff /* ~500 */ | |
515 | ||
516 | static int mgc_requeue_thread(void *data) | |
517 | { | |
4345abb2 BJ |
518 | bool first = true; |
519 | ||
d7e09d03 PT |
520 | CDEBUG(D_MGC, "Starting requeue thread\n"); |
521 | ||
522 | /* Keep trying failed locks periodically */ | |
523 | spin_lock(&config_list_lock); | |
524 | rq_state |= RQ_RUNNING; | |
525 | while (1) { | |
526 | struct l_wait_info lwi; | |
527 | struct config_llog_data *cld, *cld_prev; | |
528 | int rand = cfs_rand() & MGC_TIMEOUT_RAND_CENTISEC; | |
529 | int stopped = !!(rq_state & RQ_STOP); | |
530 | int to; | |
531 | ||
532 | /* Any new or requeued lostlocks will change the state */ | |
533 | rq_state &= ~(RQ_NOW | RQ_LATER); | |
534 | spin_unlock(&config_list_lock); | |
535 | ||
4345abb2 BJ |
536 | if (first) { |
537 | first = false; | |
538 | complete(&rq_start); | |
539 | } | |
540 | ||
d7e09d03 PT |
541 | /* Always wait a few seconds to allow the server who |
542 | caused the lock revocation to finish its setup, plus some | |
543 | random so everyone doesn't try to reconnect at once. */ | |
544 | to = MGC_TIMEOUT_MIN_SECONDS * HZ; | |
545 | to += rand * HZ / 100; /* rand is centi-seconds */ | |
546 | lwi = LWI_TIMEOUT(to, NULL, NULL); | |
4345abb2 BJ |
547 | l_wait_event(rq_waitq, rq_state & (RQ_STOP | RQ_PRECLEANUP), |
548 | &lwi); | |
d7e09d03 PT |
549 | |
550 | /* | |
551 | * iterate & processing through the list. for each cld, process | |
552 | * its depending sptlrpc cld firstly (if any) and then itself. | |
553 | * | |
554 | * it's guaranteed any item in the list must have | |
555 | * reference > 0; and if cld_lostlock is set, at | |
556 | * least one reference is taken by the previous enqueue. | |
557 | */ | |
558 | cld_prev = NULL; | |
559 | ||
560 | spin_lock(&config_list_lock); | |
4345abb2 | 561 | rq_state &= ~RQ_PRECLEANUP; |
d7e09d03 PT |
562 | list_for_each_entry(cld, &config_llog_list, |
563 | cld_list_chain) { | |
564 | if (!cld->cld_lostlock) | |
565 | continue; | |
566 | ||
567 | spin_unlock(&config_list_lock); | |
568 | ||
569 | LASSERT(atomic_read(&cld->cld_refcount) > 0); | |
570 | ||
571 | /* Whether we enqueued again or not in mgc_process_log, | |
572 | * we're done with the ref from the old enqueue */ | |
573 | if (cld_prev) | |
574 | config_log_put(cld_prev); | |
575 | cld_prev = cld; | |
576 | ||
577 | cld->cld_lostlock = 0; | |
578 | if (likely(!stopped)) | |
579 | do_requeue(cld); | |
580 | ||
581 | spin_lock(&config_list_lock); | |
582 | } | |
583 | spin_unlock(&config_list_lock); | |
584 | if (cld_prev) | |
585 | config_log_put(cld_prev); | |
586 | ||
587 | /* break after scanning the list so that we can drop | |
588 | * refcount to losing lock clds */ | |
589 | if (unlikely(stopped)) { | |
590 | spin_lock(&config_list_lock); | |
591 | break; | |
592 | } | |
593 | ||
594 | /* Wait a bit to see if anyone else needs a requeue */ | |
595 | lwi = (struct l_wait_info) { 0 }; | |
596 | l_wait_event(rq_waitq, rq_state & (RQ_NOW | RQ_STOP), | |
597 | &lwi); | |
598 | spin_lock(&config_list_lock); | |
599 | } | |
600 | /* spinlock and while guarantee RQ_NOW and RQ_LATER are not set */ | |
601 | rq_state &= ~RQ_RUNNING; | |
602 | spin_unlock(&config_list_lock); | |
603 | ||
604 | complete(&rq_exit); | |
605 | ||
606 | CDEBUG(D_MGC, "Ending requeue thread\n"); | |
84827278 | 607 | return 0; |
d7e09d03 PT |
608 | } |
609 | ||
610 | /* Add a cld to the list to requeue. Start the requeue thread if needed. | |
611 | We are responsible for dropping the config log reference from here on out. */ | |
612 | static void mgc_requeue_add(struct config_llog_data *cld) | |
613 | { | |
d7e09d03 PT |
614 | CDEBUG(D_INFO, "log %s: requeue (r=%d sp=%d st=%x)\n", |
615 | cld->cld_logname, atomic_read(&cld->cld_refcount), | |
616 | cld->cld_stopping, rq_state); | |
617 | LASSERT(atomic_read(&cld->cld_refcount) > 0); | |
618 | ||
619 | mutex_lock(&cld->cld_lock); | |
620 | if (cld->cld_stopping || cld->cld_lostlock) { | |
621 | mutex_unlock(&cld->cld_lock); | |
e05e02e4 | 622 | return; |
d7e09d03 PT |
623 | } |
624 | /* this refcount will be released in mgc_requeue_thread. */ | |
625 | config_log_get(cld); | |
626 | cld->cld_lostlock = 1; | |
627 | mutex_unlock(&cld->cld_lock); | |
628 | ||
629 | /* Hold lock for rq_state */ | |
630 | spin_lock(&config_list_lock); | |
631 | if (rq_state & RQ_STOP) { | |
632 | spin_unlock(&config_list_lock); | |
633 | cld->cld_lostlock = 0; | |
634 | config_log_put(cld); | |
635 | } else { | |
636 | rq_state |= RQ_NOW; | |
637 | spin_unlock(&config_list_lock); | |
638 | wake_up(&rq_waitq); | |
639 | } | |
d7e09d03 PT |
640 | } |
641 | ||
aa4e3c8a MP |
642 | static int mgc_llog_init(const struct lu_env *env, struct obd_device *obd) |
643 | { | |
644 | struct llog_ctxt *ctxt; | |
645 | int rc; | |
646 | ||
647 | /* setup only remote ctxt, the local disk context is switched per each | |
648 | * filesystem during mgc_fs_setup() */ | |
649 | rc = llog_setup(env, obd, &obd->obd_olg, LLOG_CONFIG_REPL_CTXT, obd, | |
650 | &llog_client_ops); | |
651 | if (rc) | |
652 | return rc; | |
653 | ||
654 | ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT); | |
655 | LASSERT(ctxt); | |
656 | ||
657 | llog_initiator_connect(ctxt); | |
658 | llog_ctxt_put(ctxt); | |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
663 | static int mgc_llog_fini(const struct lu_env *env, struct obd_device *obd) | |
664 | { | |
665 | struct llog_ctxt *ctxt; | |
666 | ||
667 | ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT); | |
668 | if (ctxt) | |
669 | llog_cleanup(env, ctxt); | |
670 | ||
671 | return 0; | |
d7e09d03 PT |
672 | } |
673 | ||
674 | static atomic_t mgc_count = ATOMIC_INIT(0); | |
675 | static int mgc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage) | |
676 | { | |
677 | int rc = 0; | |
4345abb2 | 678 | int temp; |
d7e09d03 PT |
679 | |
680 | switch (stage) { | |
681 | case OBD_CLEANUP_EARLY: | |
682 | break; | |
683 | case OBD_CLEANUP_EXPORTS: | |
684 | if (atomic_dec_and_test(&mgc_count)) { | |
4345abb2 | 685 | LASSERT(rq_state & RQ_RUNNING); |
d7e09d03 | 686 | /* stop requeue thread */ |
4345abb2 BJ |
687 | temp = RQ_STOP; |
688 | } else { | |
689 | /* wakeup requeue thread to clean our cld */ | |
690 | temp = RQ_NOW | RQ_PRECLEANUP; | |
d7e09d03 | 691 | } |
4345abb2 BJ |
692 | spin_lock(&config_list_lock); |
693 | rq_state |= temp; | |
694 | spin_unlock(&config_list_lock); | |
695 | wake_up(&rq_waitq); | |
696 | if (temp & RQ_STOP) | |
697 | wait_for_completion(&rq_exit); | |
d7e09d03 | 698 | obd_cleanup_client_import(obd); |
aa4e3c8a | 699 | rc = mgc_llog_fini(NULL, obd); |
d7e09d03 PT |
700 | if (rc != 0) |
701 | CERROR("failed to cleanup llogging subsystems\n"); | |
702 | break; | |
703 | } | |
0a3bdb00 | 704 | return rc; |
d7e09d03 PT |
705 | } |
706 | ||
707 | static int mgc_cleanup(struct obd_device *obd) | |
708 | { | |
d7e09d03 PT |
709 | /* COMPAT_146 - old config logs may have added profiles we don't |
710 | know about */ | |
711 | if (obd->obd_type->typ_refcnt <= 1) | |
712 | /* Only for the last mgc */ | |
713 | class_del_profiles(); | |
714 | ||
715 | lprocfs_obd_cleanup(obd); | |
716 | ptlrpcd_decref(); | |
717 | ||
aba5c139 | 718 | return client_obd_cleanup(obd); |
d7e09d03 PT |
719 | } |
720 | ||
721 | static int mgc_setup(struct obd_device *obd, struct lustre_cfg *lcfg) | |
722 | { | |
9b801302 | 723 | struct lprocfs_static_vars lvars = { NULL }; |
d7e09d03 | 724 | int rc; |
d7e09d03 PT |
725 | |
726 | ptlrpcd_addref(); | |
727 | ||
728 | rc = client_obd_setup(obd, lcfg); | |
729 | if (rc) | |
74d3ba98 | 730 | goto err_decref; |
d7e09d03 | 731 | |
aa4e3c8a | 732 | rc = mgc_llog_init(NULL, obd); |
d7e09d03 PT |
733 | if (rc) { |
734 | CERROR("failed to setup llogging subsystems\n"); | |
74d3ba98 | 735 | goto err_cleanup; |
d7e09d03 PT |
736 | } |
737 | ||
738 | lprocfs_mgc_init_vars(&lvars); | |
9b801302 | 739 | lprocfs_obd_setup(obd, lvars.obd_vars, lvars.sysfs_vars); |
d7e09d03 PT |
740 | sptlrpc_lprocfs_cliobd_attach(obd); |
741 | ||
742 | if (atomic_inc_return(&mgc_count) == 1) { | |
743 | rq_state = 0; | |
744 | init_waitqueue_head(&rq_waitq); | |
745 | ||
746 | /* start requeue thread */ | |
747 | rc = PTR_ERR(kthread_run(mgc_requeue_thread, NULL, | |
748 | "ll_cfg_requeue")); | |
749 | if (IS_ERR_VALUE(rc)) { | |
2d00bd17 | 750 | CERROR("%s: Cannot start requeue thread (%d),no more log updates!\n", |
d7e09d03 | 751 | obd->obd_name, rc); |
74d3ba98 | 752 | goto err_cleanup; |
d7e09d03 PT |
753 | } |
754 | /* rc is the task_struct pointer of mgc_requeue_thread. */ | |
755 | rc = 0; | |
4345abb2 | 756 | wait_for_completion(&rq_start); |
d7e09d03 PT |
757 | } |
758 | ||
0a3bdb00 | 759 | return rc; |
d7e09d03 PT |
760 | |
761 | err_cleanup: | |
762 | client_obd_cleanup(obd); | |
763 | err_decref: | |
764 | ptlrpcd_decref(); | |
0a3bdb00 | 765 | return rc; |
d7e09d03 PT |
766 | } |
767 | ||
768 | /* based on ll_mdc_blocking_ast */ | |
769 | static int mgc_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc, | |
770 | void *data, int flag) | |
771 | { | |
772 | struct lustre_handle lockh; | |
773 | struct config_llog_data *cld = (struct config_llog_data *)data; | |
774 | int rc = 0; | |
d7e09d03 PT |
775 | |
776 | switch (flag) { | |
777 | case LDLM_CB_BLOCKING: | |
778 | /* mgs wants the lock, give it up... */ | |
779 | LDLM_DEBUG(lock, "MGC blocking CB"); | |
780 | ldlm_lock2handle(lock, &lockh); | |
781 | rc = ldlm_cli_cancel(&lockh, LCF_ASYNC); | |
782 | break; | |
783 | case LDLM_CB_CANCELING: | |
784 | /* We've given up the lock, prepare ourselves to update. */ | |
785 | LDLM_DEBUG(lock, "MGC cancel CB"); | |
786 | ||
6d95e048 AD |
787 | CDEBUG(D_MGC, "Lock res "DLDLMRES" (%.8s)\n", |
788 | PLDLMRES(lock->l_resource), | |
d7e09d03 PT |
789 | (char *)&lock->l_resource->lr_name.name[0]); |
790 | ||
791 | if (!cld) { | |
792 | CDEBUG(D_INFO, "missing data, won't requeue\n"); | |
793 | break; | |
794 | } | |
795 | ||
796 | /* held at mgc_process_log(). */ | |
797 | LASSERT(atomic_read(&cld->cld_refcount) > 0); | |
798 | /* Are we done with this log? */ | |
799 | if (cld->cld_stopping) { | |
800 | CDEBUG(D_MGC, "log %s: stopping, won't requeue\n", | |
801 | cld->cld_logname); | |
802 | config_log_put(cld); | |
803 | break; | |
804 | } | |
805 | /* Make sure not to re-enqueue when the mgc is stopping | |
806 | (we get called from client_disconnect_export) */ | |
807 | if (!lock->l_conn_export || | |
808 | !lock->l_conn_export->exp_obd->u.cli.cl_conn_count) { | |
809 | CDEBUG(D_MGC, "log %.8s: disconnecting, won't requeue\n", | |
810 | cld->cld_logname); | |
811 | config_log_put(cld); | |
812 | break; | |
813 | } | |
814 | ||
815 | /* Re-enqueue now */ | |
816 | mgc_requeue_add(cld); | |
817 | config_log_put(cld); | |
818 | break; | |
819 | default: | |
820 | LBUG(); | |
821 | } | |
822 | ||
0a3bdb00 | 823 | return rc; |
d7e09d03 PT |
824 | } |
825 | ||
826 | /* Not sure where this should go... */ | |
06e4f6ca CS |
827 | /* This is the timeout value for MGS_CONNECT request plus a ping interval, such |
828 | * that we can have a chance to try the secondary MGS if any. */ | |
829 | #define MGC_ENQUEUE_LIMIT (INITIAL_CONNECT_TIMEOUT + (AT_OFF ? 0 : at_min) \ | |
830 | + PING_INTERVAL) | |
d7e09d03 PT |
831 | #define MGC_TARGET_REG_LIMIT 10 |
832 | #define MGC_SEND_PARAM_LIMIT 10 | |
833 | ||
834 | /* Send parameter to MGS*/ | |
835 | static int mgc_set_mgs_param(struct obd_export *exp, | |
836 | struct mgs_send_param *msp) | |
837 | { | |
838 | struct ptlrpc_request *req; | |
839 | struct mgs_send_param *req_msp, *rep_msp; | |
840 | int rc; | |
d7e09d03 PT |
841 | |
842 | req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), | |
843 | &RQF_MGS_SET_INFO, LUSTRE_MGS_VERSION, | |
844 | MGS_SET_INFO); | |
845 | if (!req) | |
0a3bdb00 | 846 | return -ENOMEM; |
d7e09d03 PT |
847 | |
848 | req_msp = req_capsule_client_get(&req->rq_pill, &RMF_MGS_SEND_PARAM); | |
849 | if (!req_msp) { | |
850 | ptlrpc_req_finished(req); | |
0a3bdb00 | 851 | return -ENOMEM; |
d7e09d03 PT |
852 | } |
853 | ||
854 | memcpy(req_msp, msp, sizeof(*req_msp)); | |
855 | ptlrpc_request_set_replen(req); | |
856 | ||
857 | /* Limit how long we will wait for the enqueue to complete */ | |
858 | req->rq_delay_limit = MGC_SEND_PARAM_LIMIT; | |
859 | rc = ptlrpc_queue_wait(req); | |
860 | if (!rc) { | |
861 | rep_msp = req_capsule_server_get(&req->rq_pill, &RMF_MGS_SEND_PARAM); | |
862 | memcpy(msp, rep_msp, sizeof(*rep_msp)); | |
863 | } | |
864 | ||
865 | ptlrpc_req_finished(req); | |
866 | ||
0a3bdb00 | 867 | return rc; |
d7e09d03 PT |
868 | } |
869 | ||
870 | /* Take a config lock so we can get cancel notifications */ | |
871 | static int mgc_enqueue(struct obd_export *exp, struct lov_stripe_md *lsm, | |
872 | __u32 type, ldlm_policy_data_t *policy, __u32 mode, | |
873 | __u64 *flags, void *bl_cb, void *cp_cb, void *gl_cb, | |
874 | void *data, __u32 lvb_len, void *lvb_swabber, | |
875 | struct lustre_handle *lockh) | |
876 | { | |
877 | struct config_llog_data *cld = (struct config_llog_data *)data; | |
f2145eae BK |
878 | struct ldlm_enqueue_info einfo = { |
879 | .ei_type = type, | |
880 | .ei_mode = mode, | |
881 | .ei_cb_bl = mgc_blocking_ast, | |
882 | .ei_cb_cp = ldlm_completion_ast, | |
883 | }; | |
d7e09d03 PT |
884 | struct ptlrpc_request *req; |
885 | int short_limit = cld_is_sptlrpc(cld); | |
886 | int rc; | |
d7e09d03 | 887 | |
55f5a824 | 888 | CDEBUG(D_MGC, "Enqueue for %s (res %#llx)\n", cld->cld_logname, |
d7e09d03 PT |
889 | cld->cld_resid.name[0]); |
890 | ||
891 | /* We need a callback for every lockholder, so don't try to | |
892 | ldlm_lock_match (see rev 1.1.2.11.2.47) */ | |
893 | req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), | |
894 | &RQF_LDLM_ENQUEUE, LUSTRE_DLM_VERSION, | |
895 | LDLM_ENQUEUE); | |
896 | if (req == NULL) | |
0a3bdb00 | 897 | return -ENOMEM; |
d7e09d03 PT |
898 | |
899 | req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER, 0); | |
900 | ptlrpc_request_set_replen(req); | |
901 | ||
902 | /* check if this is server or client */ | |
903 | if (cld->cld_cfg.cfg_sb) { | |
904 | struct lustre_sb_info *lsi = s2lsi(cld->cld_cfg.cfg_sb); | |
905 | if (lsi && IS_SERVER(lsi)) | |
906 | short_limit = 1; | |
907 | } | |
908 | /* Limit how long we will wait for the enqueue to complete */ | |
909 | req->rq_delay_limit = short_limit ? 5 : MGC_ENQUEUE_LIMIT; | |
910 | rc = ldlm_cli_enqueue(exp, &req, &einfo, &cld->cld_resid, NULL, flags, | |
911 | NULL, 0, LVB_T_NONE, lockh, 0); | |
912 | /* A failed enqueue should still call the mgc_blocking_ast, | |
913 | where it will be requeued if needed ("grant failed"). */ | |
914 | ptlrpc_req_finished(req); | |
0a3bdb00 | 915 | return rc; |
d7e09d03 PT |
916 | } |
917 | ||
d7e09d03 PT |
918 | static void mgc_notify_active(struct obd_device *unused) |
919 | { | |
920 | /* wakeup mgc_requeue_thread to requeue mgc lock */ | |
921 | spin_lock(&config_list_lock); | |
922 | rq_state |= RQ_NOW; | |
923 | spin_unlock(&config_list_lock); | |
924 | wake_up(&rq_waitq); | |
925 | ||
926 | /* TODO: Help the MGS rebuild nidtbl. -jay */ | |
927 | } | |
928 | ||
929 | /* Send target_reg message to MGS */ | |
930 | static int mgc_target_register(struct obd_export *exp, | |
931 | struct mgs_target_info *mti) | |
932 | { | |
933 | struct ptlrpc_request *req; | |
934 | struct mgs_target_info *req_mti, *rep_mti; | |
935 | int rc; | |
d7e09d03 PT |
936 | |
937 | req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), | |
938 | &RQF_MGS_TARGET_REG, LUSTRE_MGS_VERSION, | |
939 | MGS_TARGET_REG); | |
940 | if (req == NULL) | |
0a3bdb00 | 941 | return -ENOMEM; |
d7e09d03 PT |
942 | |
943 | req_mti = req_capsule_client_get(&req->rq_pill, &RMF_MGS_TARGET_INFO); | |
944 | if (!req_mti) { | |
945 | ptlrpc_req_finished(req); | |
0a3bdb00 | 946 | return -ENOMEM; |
d7e09d03 PT |
947 | } |
948 | ||
949 | memcpy(req_mti, mti, sizeof(*req_mti)); | |
950 | ptlrpc_request_set_replen(req); | |
951 | CDEBUG(D_MGC, "register %s\n", mti->mti_svname); | |
952 | /* Limit how long we will wait for the enqueue to complete */ | |
953 | req->rq_delay_limit = MGC_TARGET_REG_LIMIT; | |
954 | ||
955 | rc = ptlrpc_queue_wait(req); | |
956 | if (!rc) { | |
957 | rep_mti = req_capsule_server_get(&req->rq_pill, | |
958 | &RMF_MGS_TARGET_INFO); | |
959 | memcpy(mti, rep_mti, sizeof(*rep_mti)); | |
960 | CDEBUG(D_MGC, "register %s got index = %d\n", | |
961 | mti->mti_svname, mti->mti_stripe_index); | |
962 | } | |
963 | ptlrpc_req_finished(req); | |
964 | ||
0a3bdb00 | 965 | return rc; |
d7e09d03 PT |
966 | } |
967 | ||
0bf31f07 | 968 | static int mgc_set_info_async(const struct lu_env *env, struct obd_export *exp, |
21aef7d9 | 969 | u32 keylen, void *key, u32 vallen, |
d7e09d03 PT |
970 | void *val, struct ptlrpc_request_set *set) |
971 | { | |
972 | int rc = -EINVAL; | |
d7e09d03 PT |
973 | |
974 | /* Turn off initial_recov after we try all backup servers once */ | |
975 | if (KEY_IS(KEY_INIT_RECOV_BACKUP)) { | |
976 | struct obd_import *imp = class_exp2cliimp(exp); | |
977 | int value; | |
978 | if (vallen != sizeof(int)) | |
0a3bdb00 | 979 | return -EINVAL; |
d7e09d03 PT |
980 | value = *(int *)val; |
981 | CDEBUG(D_MGC, "InitRecov %s %d/d%d:i%d:r%d:or%d:%s\n", | |
982 | imp->imp_obd->obd_name, value, | |
983 | imp->imp_deactive, imp->imp_invalid, | |
984 | imp->imp_replayable, imp->imp_obd->obd_replayable, | |
985 | ptlrpc_import_state_name(imp->imp_state)); | |
986 | /* Resurrect if we previously died */ | |
987 | if ((imp->imp_state != LUSTRE_IMP_FULL && | |
988 | imp->imp_state != LUSTRE_IMP_NEW) || value > 1) | |
989 | ptlrpc_reconnect_import(imp); | |
0a3bdb00 | 990 | return 0; |
d7e09d03 | 991 | } |
d7e09d03 PT |
992 | if (KEY_IS(KEY_SET_INFO)) { |
993 | struct mgs_send_param *msp; | |
994 | ||
995 | msp = (struct mgs_send_param *)val; | |
996 | rc = mgc_set_mgs_param(exp, msp); | |
0a3bdb00 | 997 | return rc; |
d7e09d03 PT |
998 | } |
999 | if (KEY_IS(KEY_MGSSEC)) { | |
1000 | struct client_obd *cli = &exp->exp_obd->u.cli; | |
1001 | struct sptlrpc_flavor flvr; | |
1002 | ||
1003 | /* | |
1004 | * empty string means using current flavor, if which haven't | |
1005 | * been set yet, set it as null. | |
1006 | * | |
1007 | * if flavor has been set previously, check the asking flavor | |
1008 | * must match the existing one. | |
1009 | */ | |
1010 | if (vallen == 0) { | |
1011 | if (cli->cl_flvr_mgc.sf_rpc != SPTLRPC_FLVR_INVALID) | |
0a3bdb00 | 1012 | return 0; |
d7e09d03 PT |
1013 | val = "null"; |
1014 | vallen = 4; | |
1015 | } | |
1016 | ||
1017 | rc = sptlrpc_parse_flavor(val, &flvr); | |
1018 | if (rc) { | |
1019 | CERROR("invalid sptlrpc flavor %s to MGS\n", | |
1020 | (char *) val); | |
0a3bdb00 | 1021 | return rc; |
d7e09d03 PT |
1022 | } |
1023 | ||
1024 | /* | |
1025 | * caller already hold a mutex | |
1026 | */ | |
1027 | if (cli->cl_flvr_mgc.sf_rpc == SPTLRPC_FLVR_INVALID) { | |
1028 | cli->cl_flvr_mgc = flvr; | |
1029 | } else if (memcmp(&cli->cl_flvr_mgc, &flvr, | |
1030 | sizeof(flvr)) != 0) { | |
1031 | char str[20]; | |
1032 | ||
1033 | sptlrpc_flavor2name(&cli->cl_flvr_mgc, | |
1034 | str, sizeof(str)); | |
2d00bd17 | 1035 | LCONSOLE_ERROR("asking sptlrpc flavor %s to MGS but currently %s is in use\n", |
d7e09d03 PT |
1036 | (char *) val, str); |
1037 | rc = -EPERM; | |
1038 | } | |
0a3bdb00 | 1039 | return rc; |
d7e09d03 PT |
1040 | } |
1041 | ||
0a3bdb00 | 1042 | return rc; |
d7e09d03 PT |
1043 | } |
1044 | ||
1045 | static int mgc_get_info(const struct lu_env *env, struct obd_export *exp, | |
1046 | __u32 keylen, void *key, __u32 *vallen, void *val, | |
1047 | struct lov_stripe_md *unused) | |
1048 | { | |
1049 | int rc = -EINVAL; | |
1050 | ||
1051 | if (KEY_IS(KEY_CONN_DATA)) { | |
1052 | struct obd_import *imp = class_exp2cliimp(exp); | |
1053 | struct obd_connect_data *data = val; | |
1054 | ||
1055 | if (*vallen == sizeof(*data)) { | |
1056 | *data = imp->imp_connect_data; | |
1057 | rc = 0; | |
1058 | } | |
1059 | } | |
1060 | ||
1061 | return rc; | |
1062 | } | |
1063 | ||
1064 | static int mgc_import_event(struct obd_device *obd, | |
1065 | struct obd_import *imp, | |
1066 | enum obd_import_event event) | |
1067 | { | |
d7e09d03 PT |
1068 | LASSERT(imp->imp_obd == obd); |
1069 | CDEBUG(D_MGC, "import event %#x\n", event); | |
1070 | ||
1071 | switch (event) { | |
1072 | case IMP_EVENT_DISCON: | |
1073 | /* MGC imports should not wait for recovery */ | |
1074 | if (OCD_HAS_FLAG(&imp->imp_connect_data, IMP_RECOV)) | |
1075 | ptlrpc_pinger_ir_down(); | |
1076 | break; | |
1077 | case IMP_EVENT_INACTIVE: | |
1078 | break; | |
1079 | case IMP_EVENT_INVALIDATE: { | |
1080 | struct ldlm_namespace *ns = obd->obd_namespace; | |
1081 | ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY); | |
1082 | break; | |
1083 | } | |
1084 | case IMP_EVENT_ACTIVE: | |
1085 | CDEBUG(D_INFO, "%s: Reactivating import\n", obd->obd_name); | |
1086 | /* Clearing obd_no_recov allows us to continue pinging */ | |
1087 | obd->obd_no_recov = 0; | |
1088 | mgc_notify_active(obd); | |
1089 | if (OCD_HAS_FLAG(&imp->imp_connect_data, IMP_RECOV)) | |
1090 | ptlrpc_pinger_ir_up(); | |
1091 | break; | |
1092 | case IMP_EVENT_OCD: | |
1093 | break; | |
1094 | case IMP_EVENT_DEACTIVATE: | |
1095 | case IMP_EVENT_ACTIVATE: | |
1096 | break; | |
1097 | default: | |
1098 | CERROR("Unknown import event %#x\n", event); | |
1099 | LBUG(); | |
1100 | } | |
84827278 | 1101 | return 0; |
d7e09d03 PT |
1102 | } |
1103 | ||
d7e09d03 PT |
1104 | enum { |
1105 | CONFIG_READ_NRPAGES_INIT = 1 << (20 - PAGE_CACHE_SHIFT), | |
1106 | CONFIG_READ_NRPAGES = 4 | |
1107 | }; | |
1108 | ||
1109 | static int mgc_apply_recover_logs(struct obd_device *mgc, | |
1110 | struct config_llog_data *cld, | |
1111 | __u64 max_version, | |
1112 | void *data, int datalen, bool mne_swab) | |
1113 | { | |
1114 | struct config_llog_instance *cfg = &cld->cld_cfg; | |
1115 | struct lustre_sb_info *lsi = s2lsi(cfg->cfg_sb); | |
1116 | struct mgs_nidtbl_entry *entry; | |
1117 | struct lustre_cfg *lcfg; | |
1118 | struct lustre_cfg_bufs bufs; | |
1119 | u64 prev_version = 0; | |
1120 | char *inst; | |
1121 | char *buf; | |
1122 | int bufsz; | |
1123 | int pos; | |
1124 | int rc = 0; | |
1125 | int off = 0; | |
d7e09d03 PT |
1126 | |
1127 | LASSERT(cfg->cfg_instance != NULL); | |
1128 | LASSERT(cfg->cfg_sb == cfg->cfg_instance); | |
1129 | ||
c9b4297f | 1130 | inst = kzalloc(PAGE_CACHE_SIZE, GFP_NOFS); |
c829be81 | 1131 | if (!inst) |
0a3bdb00 | 1132 | return -ENOMEM; |
d7e09d03 PT |
1133 | |
1134 | if (!IS_SERVER(lsi)) { | |
1135 | pos = snprintf(inst, PAGE_CACHE_SIZE, "%p", cfg->cfg_instance); | |
1136 | if (pos >= PAGE_CACHE_SIZE) { | |
c9b4297f | 1137 | kfree(inst); |
d7e09d03 PT |
1138 | return -E2BIG; |
1139 | } | |
1140 | } else { | |
1141 | LASSERT(IS_MDT(lsi)); | |
1142 | rc = server_name2svname(lsi->lsi_svname, inst, NULL, | |
1143 | PAGE_CACHE_SIZE); | |
1144 | if (rc) { | |
c9b4297f | 1145 | kfree(inst); |
0a3bdb00 | 1146 | return -EINVAL; |
d7e09d03 PT |
1147 | } |
1148 | pos = strlen(inst); | |
1149 | } | |
1150 | ||
1151 | ++pos; | |
1152 | buf = inst + pos; | |
1153 | bufsz = PAGE_CACHE_SIZE - pos; | |
1154 | ||
1155 | while (datalen > 0) { | |
1156 | int entry_len = sizeof(*entry); | |
1157 | int is_ost; | |
1158 | struct obd_device *obd; | |
1159 | char *obdname; | |
1160 | char *cname; | |
1161 | char *params; | |
1162 | char *uuid; | |
1163 | ||
1164 | rc = -EINVAL; | |
1165 | if (datalen < sizeof(*entry)) | |
1166 | break; | |
1167 | ||
1168 | entry = (typeof(entry))(data + off); | |
1169 | ||
1170 | /* sanity check */ | |
1171 | if (entry->mne_nid_type != 0) /* only support type 0 for ipv4 */ | |
1172 | break; | |
1173 | if (entry->mne_nid_count == 0) /* at least one nid entry */ | |
1174 | break; | |
1175 | if (entry->mne_nid_size != sizeof(lnet_nid_t)) | |
1176 | break; | |
1177 | ||
1178 | entry_len += entry->mne_nid_count * entry->mne_nid_size; | |
1179 | if (datalen < entry_len) /* must have entry_len at least */ | |
1180 | break; | |
1181 | ||
1182 | /* Keep this swab for normal mixed endian handling. LU-1644 */ | |
1183 | if (mne_swab) | |
1184 | lustre_swab_mgs_nidtbl_entry(entry); | |
1185 | if (entry->mne_length > PAGE_CACHE_SIZE) { | |
1186 | CERROR("MNE too large (%u)\n", entry->mne_length); | |
1187 | break; | |
1188 | } | |
1189 | ||
1190 | if (entry->mne_length < entry_len) | |
1191 | break; | |
1192 | ||
1193 | off += entry->mne_length; | |
1194 | datalen -= entry->mne_length; | |
1195 | if (datalen < 0) | |
1196 | break; | |
1197 | ||
1198 | if (entry->mne_version > max_version) { | |
1199 | CERROR("entry index(%lld) is over max_index(%lld)\n", | |
1200 | entry->mne_version, max_version); | |
1201 | break; | |
1202 | } | |
1203 | ||
1204 | if (prev_version >= entry->mne_version) { | |
1205 | CERROR("index unsorted, prev %lld, now %lld\n", | |
1206 | prev_version, entry->mne_version); | |
1207 | break; | |
1208 | } | |
1209 | prev_version = entry->mne_version; | |
1210 | ||
1211 | /* | |
1212 | * Write a string with format "nid::instance" to | |
1213 | * lustre/<osc|mdc>/<target>-<osc|mdc>-<instance>/import. | |
1214 | */ | |
1215 | ||
1216 | is_ost = entry->mne_type == LDD_F_SV_TYPE_OST; | |
1217 | memset(buf, 0, bufsz); | |
1218 | obdname = buf; | |
1219 | pos = 0; | |
1220 | ||
1221 | /* lustre-OST0001-osc-<instance #> */ | |
1222 | strcpy(obdname, cld->cld_logname); | |
1223 | cname = strrchr(obdname, '-'); | |
1224 | if (cname == NULL) { | |
1225 | CERROR("mgc %s: invalid logname %s\n", | |
1226 | mgc->obd_name, obdname); | |
1227 | break; | |
1228 | } | |
1229 | ||
1230 | pos = cname - obdname; | |
1231 | obdname[pos] = 0; | |
1232 | pos += sprintf(obdname + pos, "-%s%04x", | |
1233 | is_ost ? "OST" : "MDT", entry->mne_index); | |
1234 | ||
91f2208c | 1235 | cname = is_ost ? "osc" : "mdc"; |
d7e09d03 PT |
1236 | pos += sprintf(obdname + pos, "-%s-%s", cname, inst); |
1237 | lustre_cfg_bufs_reset(&bufs, obdname); | |
1238 | ||
1239 | /* find the obd by obdname */ | |
1240 | obd = class_name2obd(obdname); | |
1241 | if (obd == NULL) { | |
1242 | CDEBUG(D_INFO, "mgc %s: cannot find obdname %s\n", | |
1243 | mgc->obd_name, obdname); | |
1244 | rc = 0; | |
1245 | /* this is a safe race, when the ost is starting up...*/ | |
1246 | continue; | |
1247 | } | |
1248 | ||
1249 | /* osc.import = "connection=<Conn UUID>::<target instance>" */ | |
1250 | ++pos; | |
1251 | params = buf + pos; | |
1252 | pos += sprintf(params, "%s.import=%s", cname, "connection="); | |
1253 | uuid = buf + pos; | |
1254 | ||
1255 | down_read(&obd->u.cli.cl_sem); | |
1256 | if (obd->u.cli.cl_import == NULL) { | |
1257 | /* client does not connect to the OST yet */ | |
1258 | up_read(&obd->u.cli.cl_sem); | |
1259 | rc = 0; | |
1260 | continue; | |
1261 | } | |
1262 | ||
1263 | /* TODO: iterate all nids to find one */ | |
1264 | /* find uuid by nid */ | |
1265 | rc = client_import_find_conn(obd->u.cli.cl_import, | |
1266 | entry->u.nids[0], | |
1267 | (struct obd_uuid *)uuid); | |
1268 | up_read(&obd->u.cli.cl_sem); | |
1269 | if (rc < 0) { | |
1270 | CERROR("mgc: cannot find uuid by nid %s\n", | |
1271 | libcfs_nid2str(entry->u.nids[0])); | |
1272 | break; | |
1273 | } | |
1274 | ||
1275 | CDEBUG(D_INFO, "Find uuid %s by nid %s\n", | |
1276 | uuid, libcfs_nid2str(entry->u.nids[0])); | |
1277 | ||
1278 | pos += strlen(uuid); | |
1279 | pos += sprintf(buf + pos, "::%u", entry->mne_instance); | |
1280 | LASSERT(pos < bufsz); | |
1281 | ||
1282 | lustre_cfg_bufs_set_string(&bufs, 1, params); | |
1283 | ||
1284 | rc = -ENOMEM; | |
1285 | lcfg = lustre_cfg_new(LCFG_PARAM, &bufs); | |
1286 | if (lcfg == NULL) { | |
1287 | CERROR("mgc: cannot allocate memory\n"); | |
1288 | break; | |
1289 | } | |
1290 | ||
f537dd2c | 1291 | CDEBUG(D_INFO, "ir apply logs %lld/%lld for %s -> %s\n", |
d7e09d03 PT |
1292 | prev_version, max_version, obdname, params); |
1293 | ||
1294 | rc = class_process_config(lcfg); | |
1295 | lustre_cfg_free(lcfg); | |
1296 | if (rc) | |
1297 | CDEBUG(D_INFO, "process config for %s error %d\n", | |
1298 | obdname, rc); | |
1299 | ||
1300 | /* continue, even one with error */ | |
1301 | } | |
1302 | ||
c9b4297f | 1303 | kfree(inst); |
0a3bdb00 | 1304 | return rc; |
d7e09d03 PT |
1305 | } |
1306 | ||
1307 | /** | |
1308 | * This function is called if this client was notified for target restarting | |
1309 | * by the MGS. A CONFIG_READ RPC is going to send to fetch recovery logs. | |
1310 | */ | |
1311 | static int mgc_process_recover_log(struct obd_device *obd, | |
1312 | struct config_llog_data *cld) | |
1313 | { | |
1314 | struct ptlrpc_request *req = NULL; | |
1315 | struct config_llog_instance *cfg = &cld->cld_cfg; | |
1316 | struct mgs_config_body *body; | |
1317 | struct mgs_config_res *res; | |
1318 | struct ptlrpc_bulk_desc *desc; | |
1319 | struct page **pages; | |
1320 | int nrpages; | |
1321 | bool eof = true; | |
1322 | bool mne_swab = false; | |
1323 | int i; | |
1324 | int ealen; | |
1325 | int rc; | |
d7e09d03 PT |
1326 | |
1327 | /* allocate buffer for bulk transfer. | |
1328 | * if this is the first time for this mgs to read logs, | |
1329 | * CONFIG_READ_NRPAGES_INIT will be used since it will read all logs | |
1330 | * once; otherwise, it only reads increment of logs, this should be | |
1331 | * small and CONFIG_READ_NRPAGES will be used. | |
1332 | */ | |
1333 | nrpages = CONFIG_READ_NRPAGES; | |
1334 | if (cfg->cfg_last_idx == 0) /* the first time */ | |
1335 | nrpages = CONFIG_READ_NRPAGES_INIT; | |
1336 | ||
c9b4297f | 1337 | pages = kcalloc(nrpages, sizeof(*pages), GFP_NOFS); |
74d3ba98 JL |
1338 | if (pages == NULL) { |
1339 | rc = -ENOMEM; | |
1340 | goto out; | |
1341 | } | |
d7e09d03 PT |
1342 | |
1343 | for (i = 0; i < nrpages; i++) { | |
1344 | pages[i] = alloc_page(GFP_IOFS); | |
74d3ba98 JL |
1345 | if (pages[i] == NULL) { |
1346 | rc = -ENOMEM; | |
1347 | goto out; | |
1348 | } | |
d7e09d03 PT |
1349 | } |
1350 | ||
1351 | again: | |
1352 | LASSERT(cld_is_recover(cld)); | |
1353 | LASSERT(mutex_is_locked(&cld->cld_lock)); | |
1354 | req = ptlrpc_request_alloc(class_exp2cliimp(cld->cld_mgcexp), | |
1355 | &RQF_MGS_CONFIG_READ); | |
74d3ba98 JL |
1356 | if (req == NULL) { |
1357 | rc = -ENOMEM; | |
1358 | goto out; | |
1359 | } | |
d7e09d03 PT |
1360 | |
1361 | rc = ptlrpc_request_pack(req, LUSTRE_MGS_VERSION, MGS_CONFIG_READ); | |
1362 | if (rc) | |
74d3ba98 | 1363 | goto out; |
d7e09d03 PT |
1364 | |
1365 | /* pack request */ | |
1366 | body = req_capsule_client_get(&req->rq_pill, &RMF_MGS_CONFIG_BODY); | |
1367 | LASSERT(body != NULL); | |
1368 | LASSERT(sizeof(body->mcb_name) > strlen(cld->cld_logname)); | |
1369 | if (strlcpy(body->mcb_name, cld->cld_logname, sizeof(body->mcb_name)) | |
74d3ba98 JL |
1370 | >= sizeof(body->mcb_name)) { |
1371 | rc = -E2BIG; | |
1372 | goto out; | |
1373 | } | |
d7e09d03 PT |
1374 | body->mcb_offset = cfg->cfg_last_idx + 1; |
1375 | body->mcb_type = cld->cld_type; | |
1376 | body->mcb_bits = PAGE_CACHE_SHIFT; | |
1377 | body->mcb_units = nrpages; | |
1378 | ||
1379 | /* allocate bulk transfer descriptor */ | |
1380 | desc = ptlrpc_prep_bulk_imp(req, nrpages, 1, BULK_PUT_SINK, | |
1381 | MGS_BULK_PORTAL); | |
74d3ba98 JL |
1382 | if (desc == NULL) { |
1383 | rc = -ENOMEM; | |
1384 | goto out; | |
1385 | } | |
d7e09d03 PT |
1386 | |
1387 | for (i = 0; i < nrpages; i++) | |
1388 | ptlrpc_prep_bulk_page_pin(desc, pages[i], 0, PAGE_CACHE_SIZE); | |
1389 | ||
1390 | ptlrpc_request_set_replen(req); | |
1391 | rc = ptlrpc_queue_wait(req); | |
1392 | if (rc) | |
74d3ba98 | 1393 | goto out; |
d7e09d03 PT |
1394 | |
1395 | res = req_capsule_server_get(&req->rq_pill, &RMF_MGS_CONFIG_RES); | |
74d3ba98 JL |
1396 | if (res->mcr_size < res->mcr_offset) { |
1397 | rc = -EINVAL; | |
1398 | goto out; | |
1399 | } | |
d7e09d03 PT |
1400 | |
1401 | /* always update the index even though it might have errors with | |
1402 | * handling the recover logs */ | |
1403 | cfg->cfg_last_idx = res->mcr_offset; | |
1404 | eof = res->mcr_offset == res->mcr_size; | |
1405 | ||
f537dd2c | 1406 | CDEBUG(D_INFO, "Latest version %lld, more %d.\n", |
d7e09d03 PT |
1407 | res->mcr_offset, eof == false); |
1408 | ||
1409 | ealen = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, 0); | |
74d3ba98 JL |
1410 | if (ealen < 0) { |
1411 | rc = ealen; | |
1412 | goto out; | |
1413 | } | |
d7e09d03 | 1414 | |
74d3ba98 JL |
1415 | if (ealen > nrpages << PAGE_CACHE_SHIFT) { |
1416 | rc = -EINVAL; | |
1417 | goto out; | |
1418 | } | |
d7e09d03 PT |
1419 | |
1420 | if (ealen == 0) { /* no logs transferred */ | |
1421 | if (!eof) | |
1422 | rc = -EINVAL; | |
74d3ba98 | 1423 | goto out; |
d7e09d03 PT |
1424 | } |
1425 | ||
1426 | mne_swab = !!ptlrpc_rep_need_swab(req); | |
1427 | #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 50, 0) | |
1428 | /* This import flag means the server did an extra swab of IR MNE | |
1429 | * records (fixed in LU-1252), reverse it here if needed. LU-1644 */ | |
1430 | if (unlikely(req->rq_import->imp_need_mne_swab)) | |
1431 | mne_swab = !mne_swab; | |
1432 | #else | |
1433 | #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and imp_need_mne_swab" | |
1434 | #endif | |
1435 | ||
1436 | for (i = 0; i < nrpages && ealen > 0; i++) { | |
1437 | int rc2; | |
1438 | void *ptr; | |
1439 | ||
1440 | ptr = kmap(pages[i]); | |
1441 | rc2 = mgc_apply_recover_logs(obd, cld, res->mcr_offset, ptr, | |
1442 | min_t(int, ealen, PAGE_CACHE_SIZE), | |
1443 | mne_swab); | |
1444 | kunmap(pages[i]); | |
1445 | if (rc2 < 0) { | |
1446 | CWARN("Process recover log %s error %d\n", | |
1447 | cld->cld_logname, rc2); | |
1448 | break; | |
1449 | } | |
1450 | ||
1451 | ealen -= PAGE_CACHE_SIZE; | |
1452 | } | |
1453 | ||
1454 | out: | |
1455 | if (req) | |
1456 | ptlrpc_req_finished(req); | |
1457 | ||
1458 | if (rc == 0 && !eof) | |
1459 | goto again; | |
1460 | ||
1461 | if (pages) { | |
1462 | for (i = 0; i < nrpages; i++) { | |
1463 | if (pages[i] == NULL) | |
1464 | break; | |
1465 | __free_page(pages[i]); | |
1466 | } | |
c9b4297f | 1467 | kfree(pages); |
d7e09d03 PT |
1468 | } |
1469 | return rc; | |
1470 | } | |
1471 | ||
d7e09d03 PT |
1472 | /* local_only means it cannot get remote llogs */ |
1473 | static int mgc_process_cfg_log(struct obd_device *mgc, | |
aa4e3c8a | 1474 | struct config_llog_data *cld, int local_only) |
d7e09d03 | 1475 | { |
0b79e161 | 1476 | struct llog_ctxt *ctxt; |
aa4e3c8a MP |
1477 | struct lustre_sb_info *lsi = NULL; |
1478 | int rc = 0; | |
1479 | bool sptlrpc_started = false; | |
1480 | struct lu_env *env; | |
d7e09d03 | 1481 | |
d7e09d03 PT |
1482 | LASSERT(cld); |
1483 | LASSERT(mutex_is_locked(&cld->cld_lock)); | |
1484 | ||
1485 | /* | |
1486 | * local copy of sptlrpc log is controlled elsewhere, don't try to | |
1487 | * read it up here. | |
1488 | */ | |
1489 | if (cld_is_sptlrpc(cld) && local_only) | |
0a3bdb00 | 1490 | return 0; |
d7e09d03 PT |
1491 | |
1492 | if (cld->cld_cfg.cfg_sb) | |
1493 | lsi = s2lsi(cld->cld_cfg.cfg_sb); | |
1494 | ||
c9b4297f | 1495 | env = kzalloc(sizeof(*env), GFP_NOFS); |
c829be81 | 1496 | if (!env) |
0a3bdb00 | 1497 | return -ENOMEM; |
d7e09d03 | 1498 | |
aa4e3c8a MP |
1499 | rc = lu_env_init(env, LCT_MG_THREAD); |
1500 | if (rc) | |
74d3ba98 | 1501 | goto out_free; |
aa4e3c8a MP |
1502 | |
1503 | ctxt = llog_get_context(mgc, LLOG_CONFIG_REPL_CTXT); | |
1504 | LASSERT(ctxt); | |
1505 | ||
0b79e161 JH |
1506 | if (local_only) /* no local log at client side */ { |
1507 | rc = -EIO; | |
1508 | goto out_pop; | |
d7e09d03 PT |
1509 | } |
1510 | ||
1511 | if (cld_is_sptlrpc(cld)) { | |
1512 | sptlrpc_conf_log_update_begin(cld->cld_logname); | |
1513 | sptlrpc_started = true; | |
1514 | } | |
1515 | ||
1516 | /* logname and instance info should be the same, so use our | |
aa4e3c8a MP |
1517 | * copy of the instance for the update. The cfg_last_idx will |
1518 | * be updated here. */ | |
1519 | rc = class_config_parse_llog(env, ctxt, cld->cld_logname, | |
d7e09d03 | 1520 | &cld->cld_cfg); |
d7e09d03 PT |
1521 | |
1522 | out_pop: | |
aa4e3c8a | 1523 | __llog_ctxt_put(env, ctxt); |
d7e09d03 | 1524 | |
d7e09d03 PT |
1525 | /* |
1526 | * update settings on existing OBDs. doing it inside | |
1527 | * of llog_process_lock so no device is attaching/detaching | |
1528 | * in parallel. | |
1529 | * the logname must be <fsname>-sptlrpc | |
1530 | */ | |
1531 | if (sptlrpc_started) { | |
1532 | LASSERT(cld_is_sptlrpc(cld)); | |
1533 | sptlrpc_conf_log_update_end(cld->cld_logname); | |
1534 | class_notify_sptlrpc_conf(cld->cld_logname, | |
1535 | strlen(cld->cld_logname) - | |
1536 | strlen("-sptlrpc")); | |
1537 | } | |
1538 | ||
aa4e3c8a MP |
1539 | lu_env_fini(env); |
1540 | out_free: | |
c9b4297f | 1541 | kfree(env); |
0a3bdb00 | 1542 | return rc; |
d7e09d03 PT |
1543 | } |
1544 | ||
1545 | /** Get a config log from the MGS and process it. | |
1546 | * This func is called for both clients and servers. | |
1547 | * Copy the log locally before parsing it if appropriate (non-MGS server) | |
1548 | */ | |
1549 | int mgc_process_log(struct obd_device *mgc, struct config_llog_data *cld) | |
1550 | { | |
1551 | struct lustre_handle lockh = { 0 }; | |
1552 | __u64 flags = LDLM_FL_NO_LRU; | |
1553 | int rc = 0, rcl; | |
d7e09d03 PT |
1554 | |
1555 | LASSERT(cld); | |
1556 | ||
1557 | /* I don't want multiple processes running process_log at once -- | |
1558 | sounds like badness. It actually might be fine, as long as | |
1559 | we're not trying to update from the same log | |
1560 | simultaneously (in which case we should use a per-log sem.) */ | |
1561 | mutex_lock(&cld->cld_lock); | |
1562 | if (cld->cld_stopping) { | |
1563 | mutex_unlock(&cld->cld_lock); | |
0a3bdb00 | 1564 | return 0; |
d7e09d03 PT |
1565 | } |
1566 | ||
1567 | OBD_FAIL_TIMEOUT(OBD_FAIL_MGC_PAUSE_PROCESS_LOG, 20); | |
1568 | ||
1569 | CDEBUG(D_MGC, "Process log %s:%p from %d\n", cld->cld_logname, | |
1570 | cld->cld_cfg.cfg_instance, cld->cld_cfg.cfg_last_idx + 1); | |
1571 | ||
1572 | /* Get the cfg lock on the llog */ | |
1573 | rcl = mgc_enqueue(mgc->u.cli.cl_mgc_mgsexp, NULL, LDLM_PLAIN, NULL, | |
1574 | LCK_CR, &flags, NULL, NULL, NULL, | |
1575 | cld, 0, NULL, &lockh); | |
1576 | if (rcl == 0) { | |
1577 | /* Get the cld, it will be released in mgc_blocking_ast. */ | |
1578 | config_log_get(cld); | |
1579 | rc = ldlm_lock_set_data(&lockh, (void *)cld); | |
1580 | LASSERT(rc == 0); | |
1581 | } else { | |
1582 | CDEBUG(D_MGC, "Can't get cfg lock: %d\n", rcl); | |
1583 | ||
1584 | /* mark cld_lostlock so that it will requeue | |
1585 | * after MGC becomes available. */ | |
1586 | cld->cld_lostlock = 1; | |
1587 | /* Get extra reference, it will be put in requeue thread */ | |
1588 | config_log_get(cld); | |
1589 | } | |
1590 | ||
1591 | ||
1592 | if (cld_is_recover(cld)) { | |
1593 | rc = 0; /* this is not a fatal error for recover log */ | |
1594 | if (rcl == 0) | |
1595 | rc = mgc_process_recover_log(mgc, cld); | |
1596 | } else { | |
1597 | rc = mgc_process_cfg_log(mgc, cld, rcl != 0); | |
1598 | } | |
1599 | ||
1600 | CDEBUG(D_MGC, "%s: configuration from log '%s' %sed (%d).\n", | |
1601 | mgc->obd_name, cld->cld_logname, rc ? "fail" : "succeed", rc); | |
1602 | ||
1603 | mutex_unlock(&cld->cld_lock); | |
1604 | ||
1605 | /* Now drop the lock so MGS can revoke it */ | |
8d3d9848 JH |
1606 | if (!rcl) |
1607 | ldlm_lock_decref(&lockh, LCK_CR); | |
d7e09d03 | 1608 | |
0a3bdb00 | 1609 | return rc; |
d7e09d03 PT |
1610 | } |
1611 | ||
1612 | ||
1613 | /** Called from lustre_process_log. | |
1614 | * LCFG_LOG_START gets the config log from the MGS, processes it to start | |
1615 | * any services, and adds it to the list logs to watch (follow). | |
1616 | */ | |
21aef7d9 | 1617 | static int mgc_process_config(struct obd_device *obd, u32 len, void *buf) |
d7e09d03 PT |
1618 | { |
1619 | struct lustre_cfg *lcfg = buf; | |
1620 | struct config_llog_instance *cfg = NULL; | |
1621 | char *logname; | |
1622 | int rc = 0; | |
d7e09d03 | 1623 | |
37821997 | 1624 | switch (lcfg->lcfg_command) { |
d7e09d03 PT |
1625 | case LCFG_LOV_ADD_OBD: { |
1626 | /* Overloading this cfg command: register a new target */ | |
1627 | struct mgs_target_info *mti; | |
1628 | ||
1629 | if (LUSTRE_CFG_BUFLEN(lcfg, 1) != | |
74d3ba98 JL |
1630 | sizeof(struct mgs_target_info)) { |
1631 | rc = -EINVAL; | |
1632 | goto out; | |
1633 | } | |
d7e09d03 PT |
1634 | |
1635 | mti = (struct mgs_target_info *)lustre_cfg_buf(lcfg, 1); | |
1636 | CDEBUG(D_MGC, "add_target %s %#x\n", | |
1637 | mti->mti_svname, mti->mti_flags); | |
1638 | rc = mgc_target_register(obd->u.cli.cl_mgc_mgsexp, mti); | |
1639 | break; | |
1640 | } | |
1641 | case LCFG_LOV_DEL_OBD: | |
1642 | /* Unregister has no meaning at the moment. */ | |
1643 | CERROR("lov_del_obd unimplemented\n"); | |
1644 | rc = -ENOSYS; | |
1645 | break; | |
1646 | case LCFG_SPTLRPC_CONF: { | |
1647 | rc = sptlrpc_process_config(lcfg); | |
1648 | break; | |
1649 | } | |
1650 | case LCFG_LOG_START: { | |
1651 | struct config_llog_data *cld; | |
1652 | struct super_block *sb; | |
1653 | ||
1654 | logname = lustre_cfg_string(lcfg, 1); | |
1655 | cfg = (struct config_llog_instance *)lustre_cfg_buf(lcfg, 2); | |
1656 | sb = *(struct super_block **)lustre_cfg_buf(lcfg, 3); | |
1657 | ||
1658 | CDEBUG(D_MGC, "parse_log %s from %d\n", logname, | |
1659 | cfg->cfg_last_idx); | |
1660 | ||
1661 | /* We're only called through here on the initial mount */ | |
1662 | rc = config_log_add(obd, logname, cfg, sb); | |
1663 | if (rc) | |
1664 | break; | |
1665 | cld = config_log_find(logname, cfg); | |
1666 | if (cld == NULL) { | |
1667 | rc = -ENOENT; | |
1668 | break; | |
1669 | } | |
1670 | ||
1671 | /* COMPAT_146 */ | |
1672 | /* FIXME only set this for old logs! Right now this forces | |
1673 | us to always skip the "inside markers" check */ | |
1674 | cld->cld_cfg.cfg_flags |= CFG_F_COMPAT146; | |
1675 | ||
1676 | rc = mgc_process_log(obd, cld); | |
1677 | if (rc == 0 && cld->cld_recover != NULL) { | |
1678 | if (OCD_HAS_FLAG(&obd->u.cli.cl_import-> | |
1679 | imp_connect_data, IMP_RECOV)) { | |
1680 | rc = mgc_process_log(obd, cld->cld_recover); | |
1681 | } else { | |
1682 | struct config_llog_data *cir = cld->cld_recover; | |
1683 | cld->cld_recover = NULL; | |
1684 | config_log_put(cir); | |
1685 | } | |
1686 | if (rc) | |
1687 | CERROR("Cannot process recover llog %d\n", rc); | |
1688 | } | |
7d4bae45 AB |
1689 | |
1690 | if (rc == 0 && cld->cld_params != NULL) { | |
1691 | rc = mgc_process_log(obd, cld->cld_params); | |
1692 | if (rc == -ENOENT) { | |
1693 | CDEBUG(D_MGC, | |
1694 | "There is no params config file yet\n"); | |
1695 | rc = 0; | |
1696 | } | |
1697 | /* params log is optional */ | |
1698 | if (rc) | |
1699 | CERROR( | |
1700 | "%s: can't process params llog: rc = %d\n", | |
1701 | obd->obd_name, rc); | |
1702 | } | |
d7e09d03 PT |
1703 | config_log_put(cld); |
1704 | ||
1705 | break; | |
1706 | } | |
1707 | case LCFG_LOG_END: { | |
1708 | logname = lustre_cfg_string(lcfg, 1); | |
1709 | ||
1710 | if (lcfg->lcfg_bufcount >= 2) | |
1711 | cfg = (struct config_llog_instance *)lustre_cfg_buf( | |
1712 | lcfg, 2); | |
1713 | rc = config_log_end(logname, cfg); | |
1714 | break; | |
1715 | } | |
1716 | default: { | |
1717 | CERROR("Unknown command: %d\n", lcfg->lcfg_command); | |
74d3ba98 JL |
1718 | rc = -EINVAL; |
1719 | goto out; | |
d7e09d03 PT |
1720 | |
1721 | } | |
1722 | } | |
1723 | out: | |
0a3bdb00 | 1724 | return rc; |
d7e09d03 PT |
1725 | } |
1726 | ||
1727 | struct obd_ops mgc_obd_ops = { | |
1728 | .o_owner = THIS_MODULE, | |
1729 | .o_setup = mgc_setup, | |
1730 | .o_precleanup = mgc_precleanup, | |
1731 | .o_cleanup = mgc_cleanup, | |
1732 | .o_add_conn = client_import_add_conn, | |
1733 | .o_del_conn = client_import_del_conn, | |
1734 | .o_connect = client_connect_import, | |
1735 | .o_disconnect = client_disconnect_export, | |
57c4b127 | 1736 | /* .o_enqueue = mgc_enqueue, */ |
57c4b127 | 1737 | /* .o_iocontrol = mgc_iocontrol, */ |
d7e09d03 PT |
1738 | .o_set_info_async = mgc_set_info_async, |
1739 | .o_get_info = mgc_get_info, | |
1740 | .o_import_event = mgc_import_event, | |
d7e09d03 PT |
1741 | .o_process_config = mgc_process_config, |
1742 | }; | |
1743 | ||
0bf31f07 | 1744 | static int __init mgc_init(void) |
d7e09d03 | 1745 | { |
2962b440 | 1746 | return class_register_type(&mgc_obd_ops, NULL, |
d7e09d03 PT |
1747 | LUSTRE_MGC_NAME, NULL); |
1748 | } | |
1749 | ||
1750 | static void /*__exit*/ mgc_exit(void) | |
1751 | { | |
1752 | class_unregister_type(LUSTRE_MGC_NAME); | |
1753 | } | |
1754 | ||
1755 | MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>"); | |
1756 | MODULE_DESCRIPTION("Lustre Management Client"); | |
1757 | MODULE_LICENSE("GPL"); | |
1758 | ||
1759 | module_init(mgc_init); | |
1760 | module_exit(mgc_exit); |