Commit | Line | Data |
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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; | |
d7e09d03 PT |
251 | struct config_llog_data *cld; |
252 | char logname[32]; | |
253 | ||
d7e09d03 PT |
254 | /* we have to use different llog for clients and mdts for cmd |
255 | * where only clients are notified if one of cmd server restarts */ | |
256 | LASSERT(strlen(fsname) < sizeof(logname) / 2); | |
257 | strcpy(logname, fsname); | |
15b441cd OD |
258 | LASSERT(lcfg.cfg_instance); |
259 | strcat(logname, "-cliir"); | |
d7e09d03 PT |
260 | |
261 | cld = do_config_log_add(obd, logname, CONFIG_T_RECOVER, &lcfg, sb); | |
262 | return cld; | |
263 | } | |
264 | ||
7d4bae45 AB |
265 | static struct config_llog_data *config_params_log_add(struct obd_device *obd, |
266 | struct config_llog_instance *cfg, struct super_block *sb) | |
267 | { | |
268 | struct config_llog_instance lcfg = *cfg; | |
269 | struct config_llog_data *cld; | |
270 | ||
271 | lcfg.cfg_instance = sb; | |
272 | ||
273 | cld = do_config_log_add(obd, PARAMS_FILENAME, CONFIG_T_PARAMS, | |
274 | &lcfg, sb); | |
275 | ||
276 | return cld; | |
277 | } | |
d7e09d03 PT |
278 | |
279 | /** Add this log to the list of active logs watched by an MGC. | |
280 | * Active means we're watching for updates. | |
281 | * We have one active log per "mount" - client instance or servername. | |
282 | * Each instance may be at a different point in the log. | |
283 | */ | |
284 | static int config_log_add(struct obd_device *obd, char *logname, | |
285 | struct config_llog_instance *cfg, | |
286 | struct super_block *sb) | |
287 | { | |
288 | struct lustre_sb_info *lsi = s2lsi(sb); | |
289 | struct config_llog_data *cld; | |
290 | struct config_llog_data *sptlrpc_cld; | |
7d4bae45 AB |
291 | struct config_llog_data *params_cld; |
292 | char seclogname[32]; | |
293 | char *ptr; | |
294 | int rc; | |
d7e09d03 PT |
295 | |
296 | CDEBUG(D_MGC, "adding config log %s:%p\n", logname, cfg->cfg_instance); | |
297 | ||
298 | /* | |
299 | * for each regular log, the depended sptlrpc log name is | |
300 | * <fsname>-sptlrpc. multiple regular logs may share one sptlrpc log. | |
301 | */ | |
302 | ptr = strrchr(logname, '-'); | |
303 | if (ptr == NULL || ptr - logname > 8) { | |
304 | CERROR("logname %s is too long\n", logname); | |
0a3bdb00 | 305 | return -EINVAL; |
d7e09d03 PT |
306 | } |
307 | ||
308 | memcpy(seclogname, logname, ptr - logname); | |
309 | strcpy(seclogname + (ptr - logname), "-sptlrpc"); | |
310 | ||
311 | sptlrpc_cld = config_log_find(seclogname, NULL); | |
312 | if (sptlrpc_cld == NULL) { | |
313 | sptlrpc_cld = do_config_log_add(obd, seclogname, | |
314 | CONFIG_T_SPTLRPC, NULL, NULL); | |
315 | if (IS_ERR(sptlrpc_cld)) { | |
316 | CERROR("can't create sptlrpc log: %s\n", seclogname); | |
74d3ba98 JL |
317 | rc = PTR_ERR(sptlrpc_cld); |
318 | goto out_err; | |
d7e09d03 PT |
319 | } |
320 | } | |
7d4bae45 AB |
321 | params_cld = config_params_log_add(obd, cfg, sb); |
322 | if (IS_ERR(params_cld)) { | |
323 | rc = PTR_ERR(params_cld); | |
324 | CERROR("%s: can't create params log: rc = %d\n", | |
325 | obd->obd_name, rc); | |
74d3ba98 | 326 | goto out_err1; |
7d4bae45 | 327 | } |
d7e09d03 PT |
328 | |
329 | cld = do_config_log_add(obd, logname, CONFIG_T_CONFIG, cfg, sb); | |
330 | if (IS_ERR(cld)) { | |
331 | CERROR("can't create log: %s\n", logname); | |
74d3ba98 JL |
332 | rc = PTR_ERR(cld); |
333 | goto out_err2; | |
d7e09d03 PT |
334 | } |
335 | ||
336 | cld->cld_sptlrpc = sptlrpc_cld; | |
7d4bae45 | 337 | cld->cld_params = params_cld; |
d7e09d03 PT |
338 | |
339 | LASSERT(lsi->lsi_lmd); | |
340 | if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)) { | |
341 | struct config_llog_data *recover_cld; | |
342 | *strrchr(seclogname, '-') = 0; | |
343 | recover_cld = config_recover_log_add(obd, seclogname, cfg, sb); | |
74d3ba98 JL |
344 | if (IS_ERR(recover_cld)) { |
345 | rc = PTR_ERR(recover_cld); | |
346 | goto out_err3; | |
347 | } | |
d7e09d03 PT |
348 | cld->cld_recover = recover_cld; |
349 | } | |
350 | ||
0a3bdb00 | 351 | return 0; |
7d4bae45 AB |
352 | |
353 | out_err3: | |
354 | config_log_put(cld); | |
355 | ||
356 | out_err2: | |
357 | config_log_put(params_cld); | |
358 | ||
359 | out_err1: | |
360 | config_log_put(sptlrpc_cld); | |
361 | ||
362 | out_err: | |
363 | return rc; | |
d7e09d03 PT |
364 | } |
365 | ||
366 | DEFINE_MUTEX(llog_process_lock); | |
367 | ||
368 | /** Stop watching for updates on this log. | |
369 | */ | |
370 | static int config_log_end(char *logname, struct config_llog_instance *cfg) | |
371 | { | |
372 | struct config_llog_data *cld; | |
373 | struct config_llog_data *cld_sptlrpc = NULL; | |
7d4bae45 | 374 | struct config_llog_data *cld_params = NULL; |
d7e09d03 PT |
375 | struct config_llog_data *cld_recover = NULL; |
376 | int rc = 0; | |
d7e09d03 PT |
377 | |
378 | cld = config_log_find(logname, cfg); | |
379 | if (cld == NULL) | |
0a3bdb00 | 380 | return -ENOENT; |
d7e09d03 PT |
381 | |
382 | mutex_lock(&cld->cld_lock); | |
383 | /* | |
384 | * if cld_stopping is set, it means we didn't start the log thus | |
385 | * not owning the start ref. this can happen after previous umount: | |
386 | * the cld still hanging there waiting for lock cancel, and we | |
387 | * remount again but failed in the middle and call log_end without | |
388 | * calling start_log. | |
389 | */ | |
390 | if (unlikely(cld->cld_stopping)) { | |
391 | mutex_unlock(&cld->cld_lock); | |
392 | /* drop the ref from the find */ | |
393 | config_log_put(cld); | |
0a3bdb00 | 394 | return rc; |
d7e09d03 PT |
395 | } |
396 | ||
397 | cld->cld_stopping = 1; | |
398 | ||
399 | cld_recover = cld->cld_recover; | |
400 | cld->cld_recover = NULL; | |
401 | mutex_unlock(&cld->cld_lock); | |
402 | ||
403 | if (cld_recover) { | |
404 | mutex_lock(&cld_recover->cld_lock); | |
405 | cld_recover->cld_stopping = 1; | |
406 | mutex_unlock(&cld_recover->cld_lock); | |
407 | config_log_put(cld_recover); | |
408 | } | |
409 | ||
410 | spin_lock(&config_list_lock); | |
411 | cld_sptlrpc = cld->cld_sptlrpc; | |
412 | cld->cld_sptlrpc = NULL; | |
7d4bae45 AB |
413 | cld_params = cld->cld_params; |
414 | cld->cld_params = NULL; | |
d7e09d03 PT |
415 | spin_unlock(&config_list_lock); |
416 | ||
417 | if (cld_sptlrpc) | |
418 | config_log_put(cld_sptlrpc); | |
419 | ||
7d4bae45 AB |
420 | if (cld_params) { |
421 | mutex_lock(&cld_params->cld_lock); | |
422 | cld_params->cld_stopping = 1; | |
423 | mutex_unlock(&cld_params->cld_lock); | |
424 | config_log_put(cld_params); | |
425 | } | |
426 | ||
d7e09d03 PT |
427 | /* drop the ref from the find */ |
428 | config_log_put(cld); | |
429 | /* drop the start ref */ | |
430 | config_log_put(cld); | |
431 | ||
432 | CDEBUG(D_MGC, "end config log %s (%d)\n", logname ? logname : "client", | |
433 | rc); | |
0a3bdb00 | 434 | return rc; |
d7e09d03 PT |
435 | } |
436 | ||
73bb1da6 | 437 | int lprocfs_mgc_rd_ir_state(struct seq_file *m, void *data) |
d7e09d03 PT |
438 | { |
439 | struct obd_device *obd = data; | |
1c8aa54a HZ |
440 | struct obd_import *imp; |
441 | struct obd_connect_data *ocd; | |
d7e09d03 | 442 | struct config_llog_data *cld; |
a15b2225 KS |
443 | int rc; |
444 | ||
445 | rc = lprocfs_climp_check(obd); | |
446 | if (rc) | |
447 | return rc; | |
d7e09d03 | 448 | |
1c8aa54a HZ |
449 | imp = obd->u.cli.cl_import; |
450 | ocd = &imp->imp_connect_data; | |
451 | ||
73bb1da6 | 452 | seq_printf(m, "imperative_recovery: %s\n", |
d7e09d03 | 453 | OCD_HAS_FLAG(ocd, IMP_RECOV) ? "ENABLED" : "DISABLED"); |
73bb1da6 | 454 | seq_printf(m, "client_state:\n"); |
d7e09d03 PT |
455 | |
456 | spin_lock(&config_list_lock); | |
457 | list_for_each_entry(cld, &config_llog_list, cld_list_chain) { | |
458 | if (cld->cld_recover == NULL) | |
459 | continue; | |
73bb1da6 | 460 | seq_printf(m, " - { client: %s, nidtbl_version: %u }\n", |
d7e09d03 PT |
461 | cld->cld_logname, |
462 | cld->cld_recover->cld_cfg.cfg_last_idx); | |
463 | } | |
464 | spin_unlock(&config_list_lock); | |
465 | ||
1c8aa54a | 466 | LPROCFS_CLIMP_EXIT(obd); |
0a3bdb00 | 467 | return 0; |
d7e09d03 PT |
468 | } |
469 | ||
470 | /* reenqueue any lost locks */ | |
471 | #define RQ_RUNNING 0x1 | |
472 | #define RQ_NOW 0x2 | |
473 | #define RQ_LATER 0x4 | |
474 | #define RQ_STOP 0x8 | |
4345abb2 | 475 | #define RQ_PRECLEANUP 0x10 |
225f597c | 476 | static int rq_state; |
d7e09d03 PT |
477 | static wait_queue_head_t rq_waitq; |
478 | static DECLARE_COMPLETION(rq_exit); | |
4345abb2 | 479 | static DECLARE_COMPLETION(rq_start); |
d7e09d03 PT |
480 | |
481 | static void do_requeue(struct config_llog_data *cld) | |
482 | { | |
d7e09d03 PT |
483 | LASSERT(atomic_read(&cld->cld_refcount) > 0); |
484 | ||
485 | /* Do not run mgc_process_log on a disconnected export or an | |
486 | export which is being disconnected. Take the client | |
487 | semaphore to make the check non-racy. */ | |
488 | down_read(&cld->cld_mgcexp->exp_obd->u.cli.cl_sem); | |
489 | if (cld->cld_mgcexp->exp_obd->u.cli.cl_conn_count != 0) { | |
490 | CDEBUG(D_MGC, "updating log %s\n", cld->cld_logname); | |
491 | mgc_process_log(cld->cld_mgcexp->exp_obd, cld); | |
492 | } else { | |
493 | CDEBUG(D_MGC, "disconnecting, won't update log %s\n", | |
494 | cld->cld_logname); | |
495 | } | |
496 | up_read(&cld->cld_mgcexp->exp_obd->u.cli.cl_sem); | |
d7e09d03 PT |
497 | } |
498 | ||
499 | /* this timeout represents how many seconds MGC should wait before | |
500 | * requeue config and recover lock to the MGS. We need to randomize this | |
501 | * in order to not flood the MGS. | |
502 | */ | |
503 | #define MGC_TIMEOUT_MIN_SECONDS 5 | |
504 | #define MGC_TIMEOUT_RAND_CENTISEC 0x1ff /* ~500 */ | |
505 | ||
506 | static int mgc_requeue_thread(void *data) | |
507 | { | |
4345abb2 BJ |
508 | bool first = true; |
509 | ||
d7e09d03 PT |
510 | CDEBUG(D_MGC, "Starting requeue thread\n"); |
511 | ||
512 | /* Keep trying failed locks periodically */ | |
513 | spin_lock(&config_list_lock); | |
514 | rq_state |= RQ_RUNNING; | |
515 | while (1) { | |
516 | struct l_wait_info lwi; | |
517 | struct config_llog_data *cld, *cld_prev; | |
518 | int rand = cfs_rand() & MGC_TIMEOUT_RAND_CENTISEC; | |
519 | int stopped = !!(rq_state & RQ_STOP); | |
520 | int to; | |
521 | ||
522 | /* Any new or requeued lostlocks will change the state */ | |
523 | rq_state &= ~(RQ_NOW | RQ_LATER); | |
524 | spin_unlock(&config_list_lock); | |
525 | ||
4345abb2 BJ |
526 | if (first) { |
527 | first = false; | |
528 | complete(&rq_start); | |
529 | } | |
530 | ||
d7e09d03 PT |
531 | /* Always wait a few seconds to allow the server who |
532 | caused the lock revocation to finish its setup, plus some | |
533 | random so everyone doesn't try to reconnect at once. */ | |
534 | to = MGC_TIMEOUT_MIN_SECONDS * HZ; | |
535 | to += rand * HZ / 100; /* rand is centi-seconds */ | |
536 | lwi = LWI_TIMEOUT(to, NULL, NULL); | |
4345abb2 BJ |
537 | l_wait_event(rq_waitq, rq_state & (RQ_STOP | RQ_PRECLEANUP), |
538 | &lwi); | |
d7e09d03 PT |
539 | |
540 | /* | |
541 | * iterate & processing through the list. for each cld, process | |
542 | * its depending sptlrpc cld firstly (if any) and then itself. | |
543 | * | |
544 | * it's guaranteed any item in the list must have | |
545 | * reference > 0; and if cld_lostlock is set, at | |
546 | * least one reference is taken by the previous enqueue. | |
547 | */ | |
548 | cld_prev = NULL; | |
549 | ||
550 | spin_lock(&config_list_lock); | |
4345abb2 | 551 | rq_state &= ~RQ_PRECLEANUP; |
d7e09d03 PT |
552 | list_for_each_entry(cld, &config_llog_list, |
553 | cld_list_chain) { | |
554 | if (!cld->cld_lostlock) | |
555 | continue; | |
556 | ||
557 | spin_unlock(&config_list_lock); | |
558 | ||
559 | LASSERT(atomic_read(&cld->cld_refcount) > 0); | |
560 | ||
561 | /* Whether we enqueued again or not in mgc_process_log, | |
562 | * we're done with the ref from the old enqueue */ | |
563 | if (cld_prev) | |
564 | config_log_put(cld_prev); | |
565 | cld_prev = cld; | |
566 | ||
567 | cld->cld_lostlock = 0; | |
568 | if (likely(!stopped)) | |
569 | do_requeue(cld); | |
570 | ||
571 | spin_lock(&config_list_lock); | |
572 | } | |
573 | spin_unlock(&config_list_lock); | |
574 | if (cld_prev) | |
575 | config_log_put(cld_prev); | |
576 | ||
577 | /* break after scanning the list so that we can drop | |
578 | * refcount to losing lock clds */ | |
579 | if (unlikely(stopped)) { | |
580 | spin_lock(&config_list_lock); | |
581 | break; | |
582 | } | |
583 | ||
584 | /* Wait a bit to see if anyone else needs a requeue */ | |
585 | lwi = (struct l_wait_info) { 0 }; | |
586 | l_wait_event(rq_waitq, rq_state & (RQ_NOW | RQ_STOP), | |
587 | &lwi); | |
588 | spin_lock(&config_list_lock); | |
589 | } | |
590 | /* spinlock and while guarantee RQ_NOW and RQ_LATER are not set */ | |
591 | rq_state &= ~RQ_RUNNING; | |
592 | spin_unlock(&config_list_lock); | |
593 | ||
594 | complete(&rq_exit); | |
595 | ||
596 | CDEBUG(D_MGC, "Ending requeue thread\n"); | |
84827278 | 597 | return 0; |
d7e09d03 PT |
598 | } |
599 | ||
600 | /* Add a cld to the list to requeue. Start the requeue thread if needed. | |
601 | We are responsible for dropping the config log reference from here on out. */ | |
602 | static void mgc_requeue_add(struct config_llog_data *cld) | |
603 | { | |
d7e09d03 PT |
604 | CDEBUG(D_INFO, "log %s: requeue (r=%d sp=%d st=%x)\n", |
605 | cld->cld_logname, atomic_read(&cld->cld_refcount), | |
606 | cld->cld_stopping, rq_state); | |
607 | LASSERT(atomic_read(&cld->cld_refcount) > 0); | |
608 | ||
609 | mutex_lock(&cld->cld_lock); | |
610 | if (cld->cld_stopping || cld->cld_lostlock) { | |
611 | mutex_unlock(&cld->cld_lock); | |
e05e02e4 | 612 | return; |
d7e09d03 PT |
613 | } |
614 | /* this refcount will be released in mgc_requeue_thread. */ | |
615 | config_log_get(cld); | |
616 | cld->cld_lostlock = 1; | |
617 | mutex_unlock(&cld->cld_lock); | |
618 | ||
619 | /* Hold lock for rq_state */ | |
620 | spin_lock(&config_list_lock); | |
621 | if (rq_state & RQ_STOP) { | |
622 | spin_unlock(&config_list_lock); | |
623 | cld->cld_lostlock = 0; | |
624 | config_log_put(cld); | |
625 | } else { | |
626 | rq_state |= RQ_NOW; | |
627 | spin_unlock(&config_list_lock); | |
628 | wake_up(&rq_waitq); | |
629 | } | |
d7e09d03 PT |
630 | } |
631 | ||
aa4e3c8a MP |
632 | static int mgc_llog_init(const struct lu_env *env, struct obd_device *obd) |
633 | { | |
634 | struct llog_ctxt *ctxt; | |
635 | int rc; | |
636 | ||
637 | /* setup only remote ctxt, the local disk context is switched per each | |
638 | * filesystem during mgc_fs_setup() */ | |
639 | rc = llog_setup(env, obd, &obd->obd_olg, LLOG_CONFIG_REPL_CTXT, obd, | |
640 | &llog_client_ops); | |
641 | if (rc) | |
642 | return rc; | |
643 | ||
644 | ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT); | |
645 | LASSERT(ctxt); | |
646 | ||
647 | llog_initiator_connect(ctxt); | |
648 | llog_ctxt_put(ctxt); | |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
653 | static int mgc_llog_fini(const struct lu_env *env, struct obd_device *obd) | |
654 | { | |
655 | struct llog_ctxt *ctxt; | |
656 | ||
657 | ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT); | |
658 | if (ctxt) | |
659 | llog_cleanup(env, ctxt); | |
660 | ||
661 | return 0; | |
d7e09d03 PT |
662 | } |
663 | ||
664 | static atomic_t mgc_count = ATOMIC_INIT(0); | |
665 | static int mgc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage) | |
666 | { | |
667 | int rc = 0; | |
4345abb2 | 668 | int temp; |
d7e09d03 PT |
669 | |
670 | switch (stage) { | |
671 | case OBD_CLEANUP_EARLY: | |
672 | break; | |
673 | case OBD_CLEANUP_EXPORTS: | |
674 | if (atomic_dec_and_test(&mgc_count)) { | |
4345abb2 | 675 | LASSERT(rq_state & RQ_RUNNING); |
d7e09d03 | 676 | /* stop requeue thread */ |
4345abb2 BJ |
677 | temp = RQ_STOP; |
678 | } else { | |
679 | /* wakeup requeue thread to clean our cld */ | |
680 | temp = RQ_NOW | RQ_PRECLEANUP; | |
d7e09d03 | 681 | } |
4345abb2 BJ |
682 | spin_lock(&config_list_lock); |
683 | rq_state |= temp; | |
684 | spin_unlock(&config_list_lock); | |
685 | wake_up(&rq_waitq); | |
686 | if (temp & RQ_STOP) | |
687 | wait_for_completion(&rq_exit); | |
d7e09d03 | 688 | obd_cleanup_client_import(obd); |
aa4e3c8a | 689 | rc = mgc_llog_fini(NULL, obd); |
d7e09d03 PT |
690 | if (rc != 0) |
691 | CERROR("failed to cleanup llogging subsystems\n"); | |
692 | break; | |
693 | } | |
0a3bdb00 | 694 | return rc; |
d7e09d03 PT |
695 | } |
696 | ||
697 | static int mgc_cleanup(struct obd_device *obd) | |
698 | { | |
d7e09d03 PT |
699 | /* COMPAT_146 - old config logs may have added profiles we don't |
700 | know about */ | |
701 | if (obd->obd_type->typ_refcnt <= 1) | |
702 | /* Only for the last mgc */ | |
703 | class_del_profiles(); | |
704 | ||
705 | lprocfs_obd_cleanup(obd); | |
706 | ptlrpcd_decref(); | |
707 | ||
aba5c139 | 708 | return client_obd_cleanup(obd); |
d7e09d03 PT |
709 | } |
710 | ||
711 | static int mgc_setup(struct obd_device *obd, struct lustre_cfg *lcfg) | |
712 | { | |
9b801302 | 713 | struct lprocfs_static_vars lvars = { NULL }; |
d7e09d03 | 714 | int rc; |
d7e09d03 PT |
715 | |
716 | ptlrpcd_addref(); | |
717 | ||
718 | rc = client_obd_setup(obd, lcfg); | |
719 | if (rc) | |
74d3ba98 | 720 | goto err_decref; |
d7e09d03 | 721 | |
aa4e3c8a | 722 | rc = mgc_llog_init(NULL, obd); |
d7e09d03 PT |
723 | if (rc) { |
724 | CERROR("failed to setup llogging subsystems\n"); | |
74d3ba98 | 725 | goto err_cleanup; |
d7e09d03 PT |
726 | } |
727 | ||
728 | lprocfs_mgc_init_vars(&lvars); | |
9b801302 | 729 | lprocfs_obd_setup(obd, lvars.obd_vars, lvars.sysfs_vars); |
d7e09d03 PT |
730 | sptlrpc_lprocfs_cliobd_attach(obd); |
731 | ||
732 | if (atomic_inc_return(&mgc_count) == 1) { | |
733 | rq_state = 0; | |
734 | init_waitqueue_head(&rq_waitq); | |
735 | ||
736 | /* start requeue thread */ | |
737 | rc = PTR_ERR(kthread_run(mgc_requeue_thread, NULL, | |
738 | "ll_cfg_requeue")); | |
739 | if (IS_ERR_VALUE(rc)) { | |
2d00bd17 | 740 | CERROR("%s: Cannot start requeue thread (%d),no more log updates!\n", |
d7e09d03 | 741 | obd->obd_name, rc); |
74d3ba98 | 742 | goto err_cleanup; |
d7e09d03 PT |
743 | } |
744 | /* rc is the task_struct pointer of mgc_requeue_thread. */ | |
745 | rc = 0; | |
4345abb2 | 746 | wait_for_completion(&rq_start); |
d7e09d03 PT |
747 | } |
748 | ||
0a3bdb00 | 749 | return rc; |
d7e09d03 PT |
750 | |
751 | err_cleanup: | |
752 | client_obd_cleanup(obd); | |
753 | err_decref: | |
754 | ptlrpcd_decref(); | |
0a3bdb00 | 755 | return rc; |
d7e09d03 PT |
756 | } |
757 | ||
758 | /* based on ll_mdc_blocking_ast */ | |
759 | static int mgc_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc, | |
760 | void *data, int flag) | |
761 | { | |
762 | struct lustre_handle lockh; | |
9581bada | 763 | struct config_llog_data *cld = data; |
d7e09d03 | 764 | int rc = 0; |
d7e09d03 PT |
765 | |
766 | switch (flag) { | |
767 | case LDLM_CB_BLOCKING: | |
768 | /* mgs wants the lock, give it up... */ | |
769 | LDLM_DEBUG(lock, "MGC blocking CB"); | |
770 | ldlm_lock2handle(lock, &lockh); | |
771 | rc = ldlm_cli_cancel(&lockh, LCF_ASYNC); | |
772 | break; | |
773 | case LDLM_CB_CANCELING: | |
774 | /* We've given up the lock, prepare ourselves to update. */ | |
775 | LDLM_DEBUG(lock, "MGC cancel CB"); | |
776 | ||
6d95e048 AD |
777 | CDEBUG(D_MGC, "Lock res "DLDLMRES" (%.8s)\n", |
778 | PLDLMRES(lock->l_resource), | |
d7e09d03 PT |
779 | (char *)&lock->l_resource->lr_name.name[0]); |
780 | ||
781 | if (!cld) { | |
782 | CDEBUG(D_INFO, "missing data, won't requeue\n"); | |
783 | break; | |
784 | } | |
785 | ||
786 | /* held at mgc_process_log(). */ | |
787 | LASSERT(atomic_read(&cld->cld_refcount) > 0); | |
788 | /* Are we done with this log? */ | |
789 | if (cld->cld_stopping) { | |
790 | CDEBUG(D_MGC, "log %s: stopping, won't requeue\n", | |
791 | cld->cld_logname); | |
792 | config_log_put(cld); | |
793 | break; | |
794 | } | |
795 | /* Make sure not to re-enqueue when the mgc is stopping | |
796 | (we get called from client_disconnect_export) */ | |
797 | if (!lock->l_conn_export || | |
798 | !lock->l_conn_export->exp_obd->u.cli.cl_conn_count) { | |
799 | CDEBUG(D_MGC, "log %.8s: disconnecting, won't requeue\n", | |
800 | cld->cld_logname); | |
801 | config_log_put(cld); | |
802 | break; | |
803 | } | |
804 | ||
805 | /* Re-enqueue now */ | |
806 | mgc_requeue_add(cld); | |
807 | config_log_put(cld); | |
808 | break; | |
809 | default: | |
810 | LBUG(); | |
811 | } | |
812 | ||
0a3bdb00 | 813 | return rc; |
d7e09d03 PT |
814 | } |
815 | ||
816 | /* Not sure where this should go... */ | |
06e4f6ca CS |
817 | /* This is the timeout value for MGS_CONNECT request plus a ping interval, such |
818 | * that we can have a chance to try the secondary MGS if any. */ | |
819 | #define MGC_ENQUEUE_LIMIT (INITIAL_CONNECT_TIMEOUT + (AT_OFF ? 0 : at_min) \ | |
820 | + PING_INTERVAL) | |
d7e09d03 PT |
821 | #define MGC_TARGET_REG_LIMIT 10 |
822 | #define MGC_SEND_PARAM_LIMIT 10 | |
823 | ||
824 | /* Send parameter to MGS*/ | |
825 | static int mgc_set_mgs_param(struct obd_export *exp, | |
826 | struct mgs_send_param *msp) | |
827 | { | |
828 | struct ptlrpc_request *req; | |
829 | struct mgs_send_param *req_msp, *rep_msp; | |
830 | int rc; | |
d7e09d03 PT |
831 | |
832 | req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), | |
833 | &RQF_MGS_SET_INFO, LUSTRE_MGS_VERSION, | |
834 | MGS_SET_INFO); | |
835 | if (!req) | |
0a3bdb00 | 836 | return -ENOMEM; |
d7e09d03 PT |
837 | |
838 | req_msp = req_capsule_client_get(&req->rq_pill, &RMF_MGS_SEND_PARAM); | |
839 | if (!req_msp) { | |
840 | ptlrpc_req_finished(req); | |
0a3bdb00 | 841 | return -ENOMEM; |
d7e09d03 PT |
842 | } |
843 | ||
844 | memcpy(req_msp, msp, sizeof(*req_msp)); | |
845 | ptlrpc_request_set_replen(req); | |
846 | ||
847 | /* Limit how long we will wait for the enqueue to complete */ | |
848 | req->rq_delay_limit = MGC_SEND_PARAM_LIMIT; | |
849 | rc = ptlrpc_queue_wait(req); | |
850 | if (!rc) { | |
851 | rep_msp = req_capsule_server_get(&req->rq_pill, &RMF_MGS_SEND_PARAM); | |
852 | memcpy(msp, rep_msp, sizeof(*rep_msp)); | |
853 | } | |
854 | ||
855 | ptlrpc_req_finished(req); | |
856 | ||
0a3bdb00 | 857 | return rc; |
d7e09d03 PT |
858 | } |
859 | ||
860 | /* Take a config lock so we can get cancel notifications */ | |
861 | static int mgc_enqueue(struct obd_export *exp, struct lov_stripe_md *lsm, | |
862 | __u32 type, ldlm_policy_data_t *policy, __u32 mode, | |
863 | __u64 *flags, void *bl_cb, void *cp_cb, void *gl_cb, | |
864 | void *data, __u32 lvb_len, void *lvb_swabber, | |
865 | struct lustre_handle *lockh) | |
866 | { | |
9581bada | 867 | struct config_llog_data *cld = data; |
f2145eae BK |
868 | struct ldlm_enqueue_info einfo = { |
869 | .ei_type = type, | |
870 | .ei_mode = mode, | |
871 | .ei_cb_bl = mgc_blocking_ast, | |
872 | .ei_cb_cp = ldlm_completion_ast, | |
873 | }; | |
d7e09d03 PT |
874 | struct ptlrpc_request *req; |
875 | int short_limit = cld_is_sptlrpc(cld); | |
876 | int rc; | |
d7e09d03 | 877 | |
55f5a824 | 878 | CDEBUG(D_MGC, "Enqueue for %s (res %#llx)\n", cld->cld_logname, |
d7e09d03 PT |
879 | cld->cld_resid.name[0]); |
880 | ||
881 | /* We need a callback for every lockholder, so don't try to | |
882 | ldlm_lock_match (see rev 1.1.2.11.2.47) */ | |
883 | req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), | |
884 | &RQF_LDLM_ENQUEUE, LUSTRE_DLM_VERSION, | |
885 | LDLM_ENQUEUE); | |
886 | if (req == NULL) | |
0a3bdb00 | 887 | return -ENOMEM; |
d7e09d03 PT |
888 | |
889 | req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER, 0); | |
890 | ptlrpc_request_set_replen(req); | |
891 | ||
d7e09d03 PT |
892 | /* Limit how long we will wait for the enqueue to complete */ |
893 | req->rq_delay_limit = short_limit ? 5 : MGC_ENQUEUE_LIMIT; | |
894 | rc = ldlm_cli_enqueue(exp, &req, &einfo, &cld->cld_resid, NULL, flags, | |
895 | NULL, 0, LVB_T_NONE, lockh, 0); | |
896 | /* A failed enqueue should still call the mgc_blocking_ast, | |
897 | where it will be requeued if needed ("grant failed"). */ | |
898 | ptlrpc_req_finished(req); | |
0a3bdb00 | 899 | return rc; |
d7e09d03 PT |
900 | } |
901 | ||
d7e09d03 PT |
902 | static void mgc_notify_active(struct obd_device *unused) |
903 | { | |
904 | /* wakeup mgc_requeue_thread to requeue mgc lock */ | |
905 | spin_lock(&config_list_lock); | |
906 | rq_state |= RQ_NOW; | |
907 | spin_unlock(&config_list_lock); | |
908 | wake_up(&rq_waitq); | |
909 | ||
910 | /* TODO: Help the MGS rebuild nidtbl. -jay */ | |
911 | } | |
912 | ||
913 | /* Send target_reg message to MGS */ | |
914 | static int mgc_target_register(struct obd_export *exp, | |
915 | struct mgs_target_info *mti) | |
916 | { | |
917 | struct ptlrpc_request *req; | |
918 | struct mgs_target_info *req_mti, *rep_mti; | |
919 | int rc; | |
d7e09d03 PT |
920 | |
921 | req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), | |
922 | &RQF_MGS_TARGET_REG, LUSTRE_MGS_VERSION, | |
923 | MGS_TARGET_REG); | |
924 | if (req == NULL) | |
0a3bdb00 | 925 | return -ENOMEM; |
d7e09d03 PT |
926 | |
927 | req_mti = req_capsule_client_get(&req->rq_pill, &RMF_MGS_TARGET_INFO); | |
928 | if (!req_mti) { | |
929 | ptlrpc_req_finished(req); | |
0a3bdb00 | 930 | return -ENOMEM; |
d7e09d03 PT |
931 | } |
932 | ||
933 | memcpy(req_mti, mti, sizeof(*req_mti)); | |
934 | ptlrpc_request_set_replen(req); | |
935 | CDEBUG(D_MGC, "register %s\n", mti->mti_svname); | |
936 | /* Limit how long we will wait for the enqueue to complete */ | |
937 | req->rq_delay_limit = MGC_TARGET_REG_LIMIT; | |
938 | ||
939 | rc = ptlrpc_queue_wait(req); | |
940 | if (!rc) { | |
941 | rep_mti = req_capsule_server_get(&req->rq_pill, | |
942 | &RMF_MGS_TARGET_INFO); | |
943 | memcpy(mti, rep_mti, sizeof(*rep_mti)); | |
944 | CDEBUG(D_MGC, "register %s got index = %d\n", | |
945 | mti->mti_svname, mti->mti_stripe_index); | |
946 | } | |
947 | ptlrpc_req_finished(req); | |
948 | ||
0a3bdb00 | 949 | return rc; |
d7e09d03 PT |
950 | } |
951 | ||
0bf31f07 | 952 | static int mgc_set_info_async(const struct lu_env *env, struct obd_export *exp, |
21aef7d9 | 953 | u32 keylen, void *key, u32 vallen, |
d7e09d03 PT |
954 | void *val, struct ptlrpc_request_set *set) |
955 | { | |
956 | int rc = -EINVAL; | |
d7e09d03 PT |
957 | |
958 | /* Turn off initial_recov after we try all backup servers once */ | |
959 | if (KEY_IS(KEY_INIT_RECOV_BACKUP)) { | |
960 | struct obd_import *imp = class_exp2cliimp(exp); | |
961 | int value; | |
50ffcb7e | 962 | |
d7e09d03 | 963 | if (vallen != sizeof(int)) |
0a3bdb00 | 964 | return -EINVAL; |
d7e09d03 PT |
965 | value = *(int *)val; |
966 | CDEBUG(D_MGC, "InitRecov %s %d/d%d:i%d:r%d:or%d:%s\n", | |
967 | imp->imp_obd->obd_name, value, | |
968 | imp->imp_deactive, imp->imp_invalid, | |
969 | imp->imp_replayable, imp->imp_obd->obd_replayable, | |
970 | ptlrpc_import_state_name(imp->imp_state)); | |
971 | /* Resurrect if we previously died */ | |
972 | if ((imp->imp_state != LUSTRE_IMP_FULL && | |
973 | imp->imp_state != LUSTRE_IMP_NEW) || value > 1) | |
974 | ptlrpc_reconnect_import(imp); | |
0a3bdb00 | 975 | return 0; |
d7e09d03 | 976 | } |
d7e09d03 PT |
977 | if (KEY_IS(KEY_SET_INFO)) { |
978 | struct mgs_send_param *msp; | |
979 | ||
9581bada | 980 | msp = val; |
d7e09d03 | 981 | rc = mgc_set_mgs_param(exp, msp); |
0a3bdb00 | 982 | return rc; |
d7e09d03 PT |
983 | } |
984 | if (KEY_IS(KEY_MGSSEC)) { | |
985 | struct client_obd *cli = &exp->exp_obd->u.cli; | |
986 | struct sptlrpc_flavor flvr; | |
987 | ||
988 | /* | |
989 | * empty string means using current flavor, if which haven't | |
990 | * been set yet, set it as null. | |
991 | * | |
992 | * if flavor has been set previously, check the asking flavor | |
993 | * must match the existing one. | |
994 | */ | |
995 | if (vallen == 0) { | |
996 | if (cli->cl_flvr_mgc.sf_rpc != SPTLRPC_FLVR_INVALID) | |
0a3bdb00 | 997 | return 0; |
d7e09d03 PT |
998 | val = "null"; |
999 | vallen = 4; | |
1000 | } | |
1001 | ||
1002 | rc = sptlrpc_parse_flavor(val, &flvr); | |
1003 | if (rc) { | |
1004 | CERROR("invalid sptlrpc flavor %s to MGS\n", | |
1005 | (char *) val); | |
0a3bdb00 | 1006 | return rc; |
d7e09d03 PT |
1007 | } |
1008 | ||
1009 | /* | |
1010 | * caller already hold a mutex | |
1011 | */ | |
1012 | if (cli->cl_flvr_mgc.sf_rpc == SPTLRPC_FLVR_INVALID) { | |
1013 | cli->cl_flvr_mgc = flvr; | |
1014 | } else if (memcmp(&cli->cl_flvr_mgc, &flvr, | |
1015 | sizeof(flvr)) != 0) { | |
1016 | char str[20]; | |
1017 | ||
1018 | sptlrpc_flavor2name(&cli->cl_flvr_mgc, | |
1019 | str, sizeof(str)); | |
2d00bd17 | 1020 | LCONSOLE_ERROR("asking sptlrpc flavor %s to MGS but currently %s is in use\n", |
d7e09d03 PT |
1021 | (char *) val, str); |
1022 | rc = -EPERM; | |
1023 | } | |
0a3bdb00 | 1024 | return rc; |
d7e09d03 PT |
1025 | } |
1026 | ||
0a3bdb00 | 1027 | return rc; |
d7e09d03 PT |
1028 | } |
1029 | ||
1030 | static int mgc_get_info(const struct lu_env *env, struct obd_export *exp, | |
1031 | __u32 keylen, void *key, __u32 *vallen, void *val, | |
1032 | struct lov_stripe_md *unused) | |
1033 | { | |
1034 | int rc = -EINVAL; | |
1035 | ||
1036 | if (KEY_IS(KEY_CONN_DATA)) { | |
1037 | struct obd_import *imp = class_exp2cliimp(exp); | |
1038 | struct obd_connect_data *data = val; | |
1039 | ||
1040 | if (*vallen == sizeof(*data)) { | |
1041 | *data = imp->imp_connect_data; | |
1042 | rc = 0; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | return rc; | |
1047 | } | |
1048 | ||
1049 | static int mgc_import_event(struct obd_device *obd, | |
1050 | struct obd_import *imp, | |
1051 | enum obd_import_event event) | |
1052 | { | |
d7e09d03 PT |
1053 | LASSERT(imp->imp_obd == obd); |
1054 | CDEBUG(D_MGC, "import event %#x\n", event); | |
1055 | ||
1056 | switch (event) { | |
1057 | case IMP_EVENT_DISCON: | |
1058 | /* MGC imports should not wait for recovery */ | |
1059 | if (OCD_HAS_FLAG(&imp->imp_connect_data, IMP_RECOV)) | |
1060 | ptlrpc_pinger_ir_down(); | |
1061 | break; | |
1062 | case IMP_EVENT_INACTIVE: | |
1063 | break; | |
1064 | case IMP_EVENT_INVALIDATE: { | |
1065 | struct ldlm_namespace *ns = obd->obd_namespace; | |
50ffcb7e | 1066 | |
d7e09d03 PT |
1067 | ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY); |
1068 | break; | |
1069 | } | |
1070 | case IMP_EVENT_ACTIVE: | |
1071 | CDEBUG(D_INFO, "%s: Reactivating import\n", obd->obd_name); | |
1072 | /* Clearing obd_no_recov allows us to continue pinging */ | |
1073 | obd->obd_no_recov = 0; | |
1074 | mgc_notify_active(obd); | |
1075 | if (OCD_HAS_FLAG(&imp->imp_connect_data, IMP_RECOV)) | |
1076 | ptlrpc_pinger_ir_up(); | |
1077 | break; | |
1078 | case IMP_EVENT_OCD: | |
1079 | break; | |
1080 | case IMP_EVENT_DEACTIVATE: | |
1081 | case IMP_EVENT_ACTIVATE: | |
1082 | break; | |
1083 | default: | |
1084 | CERROR("Unknown import event %#x\n", event); | |
1085 | LBUG(); | |
1086 | } | |
84827278 | 1087 | return 0; |
d7e09d03 PT |
1088 | } |
1089 | ||
d7e09d03 PT |
1090 | enum { |
1091 | CONFIG_READ_NRPAGES_INIT = 1 << (20 - PAGE_CACHE_SHIFT), | |
1092 | CONFIG_READ_NRPAGES = 4 | |
1093 | }; | |
1094 | ||
1095 | static int mgc_apply_recover_logs(struct obd_device *mgc, | |
1096 | struct config_llog_data *cld, | |
1097 | __u64 max_version, | |
1098 | void *data, int datalen, bool mne_swab) | |
1099 | { | |
1100 | struct config_llog_instance *cfg = &cld->cld_cfg; | |
d7e09d03 PT |
1101 | struct mgs_nidtbl_entry *entry; |
1102 | struct lustre_cfg *lcfg; | |
1103 | struct lustre_cfg_bufs bufs; | |
1104 | u64 prev_version = 0; | |
1105 | char *inst; | |
1106 | char *buf; | |
1107 | int bufsz; | |
1108 | int pos; | |
1109 | int rc = 0; | |
1110 | int off = 0; | |
d7e09d03 PT |
1111 | |
1112 | LASSERT(cfg->cfg_instance != NULL); | |
1113 | LASSERT(cfg->cfg_sb == cfg->cfg_instance); | |
1114 | ||
40113370 | 1115 | inst = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL); |
c829be81 | 1116 | if (!inst) |
0a3bdb00 | 1117 | return -ENOMEM; |
d7e09d03 | 1118 | |
15b441cd OD |
1119 | pos = snprintf(inst, PAGE_CACHE_SIZE, "%p", cfg->cfg_instance); |
1120 | if (pos >= PAGE_CACHE_SIZE) { | |
1121 | kfree(inst); | |
1122 | return -E2BIG; | |
d7e09d03 PT |
1123 | } |
1124 | ||
1125 | ++pos; | |
1126 | buf = inst + pos; | |
1127 | bufsz = PAGE_CACHE_SIZE - pos; | |
1128 | ||
1129 | while (datalen > 0) { | |
1130 | int entry_len = sizeof(*entry); | |
1131 | int is_ost; | |
1132 | struct obd_device *obd; | |
1133 | char *obdname; | |
1134 | char *cname; | |
1135 | char *params; | |
1136 | char *uuid; | |
1137 | ||
1138 | rc = -EINVAL; | |
1139 | if (datalen < sizeof(*entry)) | |
1140 | break; | |
1141 | ||
1142 | entry = (typeof(entry))(data + off); | |
1143 | ||
1144 | /* sanity check */ | |
1145 | if (entry->mne_nid_type != 0) /* only support type 0 for ipv4 */ | |
1146 | break; | |
1147 | if (entry->mne_nid_count == 0) /* at least one nid entry */ | |
1148 | break; | |
1149 | if (entry->mne_nid_size != sizeof(lnet_nid_t)) | |
1150 | break; | |
1151 | ||
1152 | entry_len += entry->mne_nid_count * entry->mne_nid_size; | |
1153 | if (datalen < entry_len) /* must have entry_len at least */ | |
1154 | break; | |
1155 | ||
1156 | /* Keep this swab for normal mixed endian handling. LU-1644 */ | |
1157 | if (mne_swab) | |
1158 | lustre_swab_mgs_nidtbl_entry(entry); | |
1159 | if (entry->mne_length > PAGE_CACHE_SIZE) { | |
1160 | CERROR("MNE too large (%u)\n", entry->mne_length); | |
1161 | break; | |
1162 | } | |
1163 | ||
1164 | if (entry->mne_length < entry_len) | |
1165 | break; | |
1166 | ||
1167 | off += entry->mne_length; | |
1168 | datalen -= entry->mne_length; | |
1169 | if (datalen < 0) | |
1170 | break; | |
1171 | ||
1172 | if (entry->mne_version > max_version) { | |
1173 | CERROR("entry index(%lld) is over max_index(%lld)\n", | |
1174 | entry->mne_version, max_version); | |
1175 | break; | |
1176 | } | |
1177 | ||
1178 | if (prev_version >= entry->mne_version) { | |
1179 | CERROR("index unsorted, prev %lld, now %lld\n", | |
1180 | prev_version, entry->mne_version); | |
1181 | break; | |
1182 | } | |
1183 | prev_version = entry->mne_version; | |
1184 | ||
1185 | /* | |
1186 | * Write a string with format "nid::instance" to | |
1187 | * lustre/<osc|mdc>/<target>-<osc|mdc>-<instance>/import. | |
1188 | */ | |
1189 | ||
1190 | is_ost = entry->mne_type == LDD_F_SV_TYPE_OST; | |
1191 | memset(buf, 0, bufsz); | |
1192 | obdname = buf; | |
1193 | pos = 0; | |
1194 | ||
1195 | /* lustre-OST0001-osc-<instance #> */ | |
1196 | strcpy(obdname, cld->cld_logname); | |
1197 | cname = strrchr(obdname, '-'); | |
1198 | if (cname == NULL) { | |
1199 | CERROR("mgc %s: invalid logname %s\n", | |
1200 | mgc->obd_name, obdname); | |
1201 | break; | |
1202 | } | |
1203 | ||
1204 | pos = cname - obdname; | |
1205 | obdname[pos] = 0; | |
1206 | pos += sprintf(obdname + pos, "-%s%04x", | |
1207 | is_ost ? "OST" : "MDT", entry->mne_index); | |
1208 | ||
91f2208c | 1209 | cname = is_ost ? "osc" : "mdc"; |
d7e09d03 PT |
1210 | pos += sprintf(obdname + pos, "-%s-%s", cname, inst); |
1211 | lustre_cfg_bufs_reset(&bufs, obdname); | |
1212 | ||
1213 | /* find the obd by obdname */ | |
1214 | obd = class_name2obd(obdname); | |
1215 | if (obd == NULL) { | |
1216 | CDEBUG(D_INFO, "mgc %s: cannot find obdname %s\n", | |
1217 | mgc->obd_name, obdname); | |
1218 | rc = 0; | |
1219 | /* this is a safe race, when the ost is starting up...*/ | |
1220 | continue; | |
1221 | } | |
1222 | ||
1223 | /* osc.import = "connection=<Conn UUID>::<target instance>" */ | |
1224 | ++pos; | |
1225 | params = buf + pos; | |
1226 | pos += sprintf(params, "%s.import=%s", cname, "connection="); | |
1227 | uuid = buf + pos; | |
1228 | ||
1229 | down_read(&obd->u.cli.cl_sem); | |
1230 | if (obd->u.cli.cl_import == NULL) { | |
1231 | /* client does not connect to the OST yet */ | |
1232 | up_read(&obd->u.cli.cl_sem); | |
1233 | rc = 0; | |
1234 | continue; | |
1235 | } | |
1236 | ||
1237 | /* TODO: iterate all nids to find one */ | |
1238 | /* find uuid by nid */ | |
1239 | rc = client_import_find_conn(obd->u.cli.cl_import, | |
1240 | entry->u.nids[0], | |
1241 | (struct obd_uuid *)uuid); | |
1242 | up_read(&obd->u.cli.cl_sem); | |
1243 | if (rc < 0) { | |
1244 | CERROR("mgc: cannot find uuid by nid %s\n", | |
1245 | libcfs_nid2str(entry->u.nids[0])); | |
1246 | break; | |
1247 | } | |
1248 | ||
1249 | CDEBUG(D_INFO, "Find uuid %s by nid %s\n", | |
1250 | uuid, libcfs_nid2str(entry->u.nids[0])); | |
1251 | ||
1252 | pos += strlen(uuid); | |
1253 | pos += sprintf(buf + pos, "::%u", entry->mne_instance); | |
1254 | LASSERT(pos < bufsz); | |
1255 | ||
1256 | lustre_cfg_bufs_set_string(&bufs, 1, params); | |
1257 | ||
1258 | rc = -ENOMEM; | |
1259 | lcfg = lustre_cfg_new(LCFG_PARAM, &bufs); | |
1260 | if (lcfg == NULL) { | |
1261 | CERROR("mgc: cannot allocate memory\n"); | |
1262 | break; | |
1263 | } | |
1264 | ||
f537dd2c | 1265 | CDEBUG(D_INFO, "ir apply logs %lld/%lld for %s -> %s\n", |
d7e09d03 PT |
1266 | prev_version, max_version, obdname, params); |
1267 | ||
1268 | rc = class_process_config(lcfg); | |
1269 | lustre_cfg_free(lcfg); | |
1270 | if (rc) | |
1271 | CDEBUG(D_INFO, "process config for %s error %d\n", | |
1272 | obdname, rc); | |
1273 | ||
1274 | /* continue, even one with error */ | |
1275 | } | |
1276 | ||
c9b4297f | 1277 | kfree(inst); |
0a3bdb00 | 1278 | return rc; |
d7e09d03 PT |
1279 | } |
1280 | ||
1281 | /** | |
1282 | * This function is called if this client was notified for target restarting | |
1283 | * by the MGS. A CONFIG_READ RPC is going to send to fetch recovery logs. | |
1284 | */ | |
1285 | static int mgc_process_recover_log(struct obd_device *obd, | |
1286 | struct config_llog_data *cld) | |
1287 | { | |
1288 | struct ptlrpc_request *req = NULL; | |
1289 | struct config_llog_instance *cfg = &cld->cld_cfg; | |
1290 | struct mgs_config_body *body; | |
1291 | struct mgs_config_res *res; | |
1292 | struct ptlrpc_bulk_desc *desc; | |
1293 | struct page **pages; | |
1294 | int nrpages; | |
1295 | bool eof = true; | |
1296 | bool mne_swab = false; | |
1297 | int i; | |
1298 | int ealen; | |
1299 | int rc; | |
d7e09d03 PT |
1300 | |
1301 | /* allocate buffer for bulk transfer. | |
1302 | * if this is the first time for this mgs to read logs, | |
1303 | * CONFIG_READ_NRPAGES_INIT will be used since it will read all logs | |
1304 | * once; otherwise, it only reads increment of logs, this should be | |
1305 | * small and CONFIG_READ_NRPAGES will be used. | |
1306 | */ | |
1307 | nrpages = CONFIG_READ_NRPAGES; | |
1308 | if (cfg->cfg_last_idx == 0) /* the first time */ | |
1309 | nrpages = CONFIG_READ_NRPAGES_INIT; | |
1310 | ||
40113370 | 1311 | pages = kcalloc(nrpages, sizeof(*pages), GFP_KERNEL); |
74d3ba98 JL |
1312 | if (pages == NULL) { |
1313 | rc = -ENOMEM; | |
1314 | goto out; | |
1315 | } | |
d7e09d03 PT |
1316 | |
1317 | for (i = 0; i < nrpages; i++) { | |
40113370 | 1318 | pages[i] = alloc_page(GFP_KERNEL); |
74d3ba98 JL |
1319 | if (pages[i] == NULL) { |
1320 | rc = -ENOMEM; | |
1321 | goto out; | |
1322 | } | |
d7e09d03 PT |
1323 | } |
1324 | ||
1325 | again: | |
1326 | LASSERT(cld_is_recover(cld)); | |
1327 | LASSERT(mutex_is_locked(&cld->cld_lock)); | |
1328 | req = ptlrpc_request_alloc(class_exp2cliimp(cld->cld_mgcexp), | |
1329 | &RQF_MGS_CONFIG_READ); | |
74d3ba98 JL |
1330 | if (req == NULL) { |
1331 | rc = -ENOMEM; | |
1332 | goto out; | |
1333 | } | |
d7e09d03 PT |
1334 | |
1335 | rc = ptlrpc_request_pack(req, LUSTRE_MGS_VERSION, MGS_CONFIG_READ); | |
1336 | if (rc) | |
74d3ba98 | 1337 | goto out; |
d7e09d03 PT |
1338 | |
1339 | /* pack request */ | |
1340 | body = req_capsule_client_get(&req->rq_pill, &RMF_MGS_CONFIG_BODY); | |
1341 | LASSERT(body != NULL); | |
1342 | LASSERT(sizeof(body->mcb_name) > strlen(cld->cld_logname)); | |
1343 | if (strlcpy(body->mcb_name, cld->cld_logname, sizeof(body->mcb_name)) | |
74d3ba98 JL |
1344 | >= sizeof(body->mcb_name)) { |
1345 | rc = -E2BIG; | |
1346 | goto out; | |
1347 | } | |
d7e09d03 PT |
1348 | body->mcb_offset = cfg->cfg_last_idx + 1; |
1349 | body->mcb_type = cld->cld_type; | |
1350 | body->mcb_bits = PAGE_CACHE_SHIFT; | |
1351 | body->mcb_units = nrpages; | |
1352 | ||
1353 | /* allocate bulk transfer descriptor */ | |
1354 | desc = ptlrpc_prep_bulk_imp(req, nrpages, 1, BULK_PUT_SINK, | |
1355 | MGS_BULK_PORTAL); | |
74d3ba98 JL |
1356 | if (desc == NULL) { |
1357 | rc = -ENOMEM; | |
1358 | goto out; | |
1359 | } | |
d7e09d03 PT |
1360 | |
1361 | for (i = 0; i < nrpages; i++) | |
1362 | ptlrpc_prep_bulk_page_pin(desc, pages[i], 0, PAGE_CACHE_SIZE); | |
1363 | ||
1364 | ptlrpc_request_set_replen(req); | |
1365 | rc = ptlrpc_queue_wait(req); | |
1366 | if (rc) | |
74d3ba98 | 1367 | goto out; |
d7e09d03 PT |
1368 | |
1369 | res = req_capsule_server_get(&req->rq_pill, &RMF_MGS_CONFIG_RES); | |
74d3ba98 JL |
1370 | if (res->mcr_size < res->mcr_offset) { |
1371 | rc = -EINVAL; | |
1372 | goto out; | |
1373 | } | |
d7e09d03 PT |
1374 | |
1375 | /* always update the index even though it might have errors with | |
1376 | * handling the recover logs */ | |
1377 | cfg->cfg_last_idx = res->mcr_offset; | |
1378 | eof = res->mcr_offset == res->mcr_size; | |
1379 | ||
f537dd2c | 1380 | CDEBUG(D_INFO, "Latest version %lld, more %d.\n", |
d7e09d03 PT |
1381 | res->mcr_offset, eof == false); |
1382 | ||
1383 | ealen = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, 0); | |
74d3ba98 JL |
1384 | if (ealen < 0) { |
1385 | rc = ealen; | |
1386 | goto out; | |
1387 | } | |
d7e09d03 | 1388 | |
74d3ba98 JL |
1389 | if (ealen > nrpages << PAGE_CACHE_SHIFT) { |
1390 | rc = -EINVAL; | |
1391 | goto out; | |
1392 | } | |
d7e09d03 PT |
1393 | |
1394 | if (ealen == 0) { /* no logs transferred */ | |
1395 | if (!eof) | |
1396 | rc = -EINVAL; | |
74d3ba98 | 1397 | goto out; |
d7e09d03 PT |
1398 | } |
1399 | ||
1400 | mne_swab = !!ptlrpc_rep_need_swab(req); | |
1401 | #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 50, 0) | |
1402 | /* This import flag means the server did an extra swab of IR MNE | |
1403 | * records (fixed in LU-1252), reverse it here if needed. LU-1644 */ | |
1404 | if (unlikely(req->rq_import->imp_need_mne_swab)) | |
1405 | mne_swab = !mne_swab; | |
1406 | #else | |
1407 | #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and imp_need_mne_swab" | |
1408 | #endif | |
1409 | ||
1410 | for (i = 0; i < nrpages && ealen > 0; i++) { | |
1411 | int rc2; | |
1412 | void *ptr; | |
1413 | ||
1414 | ptr = kmap(pages[i]); | |
1415 | rc2 = mgc_apply_recover_logs(obd, cld, res->mcr_offset, ptr, | |
1416 | min_t(int, ealen, PAGE_CACHE_SIZE), | |
1417 | mne_swab); | |
1418 | kunmap(pages[i]); | |
1419 | if (rc2 < 0) { | |
1420 | CWARN("Process recover log %s error %d\n", | |
1421 | cld->cld_logname, rc2); | |
1422 | break; | |
1423 | } | |
1424 | ||
1425 | ealen -= PAGE_CACHE_SIZE; | |
1426 | } | |
1427 | ||
1428 | out: | |
1429 | if (req) | |
1430 | ptlrpc_req_finished(req); | |
1431 | ||
1432 | if (rc == 0 && !eof) | |
1433 | goto again; | |
1434 | ||
1435 | if (pages) { | |
1436 | for (i = 0; i < nrpages; i++) { | |
1437 | if (pages[i] == NULL) | |
1438 | break; | |
1439 | __free_page(pages[i]); | |
1440 | } | |
c9b4297f | 1441 | kfree(pages); |
d7e09d03 PT |
1442 | } |
1443 | return rc; | |
1444 | } | |
1445 | ||
d7e09d03 PT |
1446 | /* local_only means it cannot get remote llogs */ |
1447 | static int mgc_process_cfg_log(struct obd_device *mgc, | |
aa4e3c8a | 1448 | struct config_llog_data *cld, int local_only) |
d7e09d03 | 1449 | { |
0b79e161 | 1450 | struct llog_ctxt *ctxt; |
aa4e3c8a MP |
1451 | struct lustre_sb_info *lsi = NULL; |
1452 | int rc = 0; | |
1453 | bool sptlrpc_started = false; | |
1454 | struct lu_env *env; | |
d7e09d03 | 1455 | |
d7e09d03 PT |
1456 | LASSERT(cld); |
1457 | LASSERT(mutex_is_locked(&cld->cld_lock)); | |
1458 | ||
1459 | /* | |
1460 | * local copy of sptlrpc log is controlled elsewhere, don't try to | |
1461 | * read it up here. | |
1462 | */ | |
1463 | if (cld_is_sptlrpc(cld) && local_only) | |
0a3bdb00 | 1464 | return 0; |
d7e09d03 PT |
1465 | |
1466 | if (cld->cld_cfg.cfg_sb) | |
1467 | lsi = s2lsi(cld->cld_cfg.cfg_sb); | |
1468 | ||
40113370 | 1469 | env = kzalloc(sizeof(*env), GFP_KERNEL); |
c829be81 | 1470 | if (!env) |
0a3bdb00 | 1471 | return -ENOMEM; |
d7e09d03 | 1472 | |
aa4e3c8a MP |
1473 | rc = lu_env_init(env, LCT_MG_THREAD); |
1474 | if (rc) | |
74d3ba98 | 1475 | goto out_free; |
aa4e3c8a MP |
1476 | |
1477 | ctxt = llog_get_context(mgc, LLOG_CONFIG_REPL_CTXT); | |
1478 | LASSERT(ctxt); | |
1479 | ||
0b79e161 JH |
1480 | if (local_only) /* no local log at client side */ { |
1481 | rc = -EIO; | |
1482 | goto out_pop; | |
d7e09d03 PT |
1483 | } |
1484 | ||
1485 | if (cld_is_sptlrpc(cld)) { | |
1486 | sptlrpc_conf_log_update_begin(cld->cld_logname); | |
1487 | sptlrpc_started = true; | |
1488 | } | |
1489 | ||
1490 | /* logname and instance info should be the same, so use our | |
aa4e3c8a MP |
1491 | * copy of the instance for the update. The cfg_last_idx will |
1492 | * be updated here. */ | |
1493 | rc = class_config_parse_llog(env, ctxt, cld->cld_logname, | |
d7e09d03 | 1494 | &cld->cld_cfg); |
d7e09d03 PT |
1495 | |
1496 | out_pop: | |
aa4e3c8a | 1497 | __llog_ctxt_put(env, ctxt); |
d7e09d03 | 1498 | |
d7e09d03 PT |
1499 | /* |
1500 | * update settings on existing OBDs. doing it inside | |
1501 | * of llog_process_lock so no device is attaching/detaching | |
1502 | * in parallel. | |
1503 | * the logname must be <fsname>-sptlrpc | |
1504 | */ | |
1505 | if (sptlrpc_started) { | |
1506 | LASSERT(cld_is_sptlrpc(cld)); | |
1507 | sptlrpc_conf_log_update_end(cld->cld_logname); | |
1508 | class_notify_sptlrpc_conf(cld->cld_logname, | |
1509 | strlen(cld->cld_logname) - | |
1510 | strlen("-sptlrpc")); | |
1511 | } | |
1512 | ||
aa4e3c8a MP |
1513 | lu_env_fini(env); |
1514 | out_free: | |
c9b4297f | 1515 | kfree(env); |
0a3bdb00 | 1516 | return rc; |
d7e09d03 PT |
1517 | } |
1518 | ||
1519 | /** Get a config log from the MGS and process it. | |
1520 | * This func is called for both clients and servers. | |
1521 | * Copy the log locally before parsing it if appropriate (non-MGS server) | |
1522 | */ | |
1523 | int mgc_process_log(struct obd_device *mgc, struct config_llog_data *cld) | |
1524 | { | |
1525 | struct lustre_handle lockh = { 0 }; | |
1526 | __u64 flags = LDLM_FL_NO_LRU; | |
1527 | int rc = 0, rcl; | |
d7e09d03 PT |
1528 | |
1529 | LASSERT(cld); | |
1530 | ||
1531 | /* I don't want multiple processes running process_log at once -- | |
1532 | sounds like badness. It actually might be fine, as long as | |
1533 | we're not trying to update from the same log | |
1534 | simultaneously (in which case we should use a per-log sem.) */ | |
1535 | mutex_lock(&cld->cld_lock); | |
1536 | if (cld->cld_stopping) { | |
1537 | mutex_unlock(&cld->cld_lock); | |
0a3bdb00 | 1538 | return 0; |
d7e09d03 PT |
1539 | } |
1540 | ||
1541 | OBD_FAIL_TIMEOUT(OBD_FAIL_MGC_PAUSE_PROCESS_LOG, 20); | |
1542 | ||
1543 | CDEBUG(D_MGC, "Process log %s:%p from %d\n", cld->cld_logname, | |
1544 | cld->cld_cfg.cfg_instance, cld->cld_cfg.cfg_last_idx + 1); | |
1545 | ||
1546 | /* Get the cfg lock on the llog */ | |
1547 | rcl = mgc_enqueue(mgc->u.cli.cl_mgc_mgsexp, NULL, LDLM_PLAIN, NULL, | |
1548 | LCK_CR, &flags, NULL, NULL, NULL, | |
1549 | cld, 0, NULL, &lockh); | |
1550 | if (rcl == 0) { | |
1551 | /* Get the cld, it will be released in mgc_blocking_ast. */ | |
1552 | config_log_get(cld); | |
1553 | rc = ldlm_lock_set_data(&lockh, (void *)cld); | |
1554 | LASSERT(rc == 0); | |
1555 | } else { | |
1556 | CDEBUG(D_MGC, "Can't get cfg lock: %d\n", rcl); | |
1557 | ||
1558 | /* mark cld_lostlock so that it will requeue | |
1559 | * after MGC becomes available. */ | |
1560 | cld->cld_lostlock = 1; | |
1561 | /* Get extra reference, it will be put in requeue thread */ | |
1562 | config_log_get(cld); | |
1563 | } | |
1564 | ||
d7e09d03 PT |
1565 | if (cld_is_recover(cld)) { |
1566 | rc = 0; /* this is not a fatal error for recover log */ | |
1567 | if (rcl == 0) | |
1568 | rc = mgc_process_recover_log(mgc, cld); | |
1569 | } else { | |
1570 | rc = mgc_process_cfg_log(mgc, cld, rcl != 0); | |
1571 | } | |
1572 | ||
1573 | CDEBUG(D_MGC, "%s: configuration from log '%s' %sed (%d).\n", | |
1574 | mgc->obd_name, cld->cld_logname, rc ? "fail" : "succeed", rc); | |
1575 | ||
1576 | mutex_unlock(&cld->cld_lock); | |
1577 | ||
1578 | /* Now drop the lock so MGS can revoke it */ | |
8d3d9848 JH |
1579 | if (!rcl) |
1580 | ldlm_lock_decref(&lockh, LCK_CR); | |
d7e09d03 | 1581 | |
0a3bdb00 | 1582 | return rc; |
d7e09d03 PT |
1583 | } |
1584 | ||
d7e09d03 PT |
1585 | /** Called from lustre_process_log. |
1586 | * LCFG_LOG_START gets the config log from the MGS, processes it to start | |
1587 | * any services, and adds it to the list logs to watch (follow). | |
1588 | */ | |
21aef7d9 | 1589 | static int mgc_process_config(struct obd_device *obd, u32 len, void *buf) |
d7e09d03 PT |
1590 | { |
1591 | struct lustre_cfg *lcfg = buf; | |
1592 | struct config_llog_instance *cfg = NULL; | |
1593 | char *logname; | |
1594 | int rc = 0; | |
d7e09d03 | 1595 | |
37821997 | 1596 | switch (lcfg->lcfg_command) { |
d7e09d03 PT |
1597 | case LCFG_LOV_ADD_OBD: { |
1598 | /* Overloading this cfg command: register a new target */ | |
1599 | struct mgs_target_info *mti; | |
1600 | ||
1601 | if (LUSTRE_CFG_BUFLEN(lcfg, 1) != | |
74d3ba98 JL |
1602 | sizeof(struct mgs_target_info)) { |
1603 | rc = -EINVAL; | |
1604 | goto out; | |
1605 | } | |
d7e09d03 PT |
1606 | |
1607 | mti = (struct mgs_target_info *)lustre_cfg_buf(lcfg, 1); | |
1608 | CDEBUG(D_MGC, "add_target %s %#x\n", | |
1609 | mti->mti_svname, mti->mti_flags); | |
1610 | rc = mgc_target_register(obd->u.cli.cl_mgc_mgsexp, mti); | |
1611 | break; | |
1612 | } | |
1613 | case LCFG_LOV_DEL_OBD: | |
1614 | /* Unregister has no meaning at the moment. */ | |
1615 | CERROR("lov_del_obd unimplemented\n"); | |
1616 | rc = -ENOSYS; | |
1617 | break; | |
1618 | case LCFG_SPTLRPC_CONF: { | |
1619 | rc = sptlrpc_process_config(lcfg); | |
1620 | break; | |
1621 | } | |
1622 | case LCFG_LOG_START: { | |
1623 | struct config_llog_data *cld; | |
1624 | struct super_block *sb; | |
1625 | ||
1626 | logname = lustre_cfg_string(lcfg, 1); | |
1627 | cfg = (struct config_llog_instance *)lustre_cfg_buf(lcfg, 2); | |
1628 | sb = *(struct super_block **)lustre_cfg_buf(lcfg, 3); | |
1629 | ||
1630 | CDEBUG(D_MGC, "parse_log %s from %d\n", logname, | |
1631 | cfg->cfg_last_idx); | |
1632 | ||
1633 | /* We're only called through here on the initial mount */ | |
1634 | rc = config_log_add(obd, logname, cfg, sb); | |
1635 | if (rc) | |
1636 | break; | |
1637 | cld = config_log_find(logname, cfg); | |
1638 | if (cld == NULL) { | |
1639 | rc = -ENOENT; | |
1640 | break; | |
1641 | } | |
1642 | ||
1643 | /* COMPAT_146 */ | |
1644 | /* FIXME only set this for old logs! Right now this forces | |
1645 | us to always skip the "inside markers" check */ | |
1646 | cld->cld_cfg.cfg_flags |= CFG_F_COMPAT146; | |
1647 | ||
1648 | rc = mgc_process_log(obd, cld); | |
1649 | if (rc == 0 && cld->cld_recover != NULL) { | |
1650 | if (OCD_HAS_FLAG(&obd->u.cli.cl_import-> | |
1651 | imp_connect_data, IMP_RECOV)) { | |
1652 | rc = mgc_process_log(obd, cld->cld_recover); | |
1653 | } else { | |
1654 | struct config_llog_data *cir = cld->cld_recover; | |
50ffcb7e | 1655 | |
d7e09d03 PT |
1656 | cld->cld_recover = NULL; |
1657 | config_log_put(cir); | |
1658 | } | |
1659 | if (rc) | |
1660 | CERROR("Cannot process recover llog %d\n", rc); | |
1661 | } | |
7d4bae45 AB |
1662 | |
1663 | if (rc == 0 && cld->cld_params != NULL) { | |
1664 | rc = mgc_process_log(obd, cld->cld_params); | |
1665 | if (rc == -ENOENT) { | |
1666 | CDEBUG(D_MGC, | |
1667 | "There is no params config file yet\n"); | |
1668 | rc = 0; | |
1669 | } | |
1670 | /* params log is optional */ | |
1671 | if (rc) | |
1672 | CERROR( | |
1673 | "%s: can't process params llog: rc = %d\n", | |
1674 | obd->obd_name, rc); | |
1675 | } | |
d7e09d03 PT |
1676 | config_log_put(cld); |
1677 | ||
1678 | break; | |
1679 | } | |
1680 | case LCFG_LOG_END: { | |
1681 | logname = lustre_cfg_string(lcfg, 1); | |
1682 | ||
1683 | if (lcfg->lcfg_bufcount >= 2) | |
1684 | cfg = (struct config_llog_instance *)lustre_cfg_buf( | |
1685 | lcfg, 2); | |
1686 | rc = config_log_end(logname, cfg); | |
1687 | break; | |
1688 | } | |
1689 | default: { | |
1690 | CERROR("Unknown command: %d\n", lcfg->lcfg_command); | |
74d3ba98 JL |
1691 | rc = -EINVAL; |
1692 | goto out; | |
d7e09d03 PT |
1693 | |
1694 | } | |
1695 | } | |
1696 | out: | |
0a3bdb00 | 1697 | return rc; |
d7e09d03 PT |
1698 | } |
1699 | ||
40220d80 | 1700 | static struct obd_ops mgc_obd_ops = { |
d7e09d03 PT |
1701 | .o_owner = THIS_MODULE, |
1702 | .o_setup = mgc_setup, | |
1703 | .o_precleanup = mgc_precleanup, | |
1704 | .o_cleanup = mgc_cleanup, | |
1705 | .o_add_conn = client_import_add_conn, | |
1706 | .o_del_conn = client_import_del_conn, | |
1707 | .o_connect = client_connect_import, | |
1708 | .o_disconnect = client_disconnect_export, | |
57c4b127 | 1709 | /* .o_enqueue = mgc_enqueue, */ |
57c4b127 | 1710 | /* .o_iocontrol = mgc_iocontrol, */ |
d7e09d03 PT |
1711 | .o_set_info_async = mgc_set_info_async, |
1712 | .o_get_info = mgc_get_info, | |
1713 | .o_import_event = mgc_import_event, | |
d7e09d03 PT |
1714 | .o_process_config = mgc_process_config, |
1715 | }; | |
1716 | ||
0bf31f07 | 1717 | static int __init mgc_init(void) |
d7e09d03 | 1718 | { |
2962b440 | 1719 | return class_register_type(&mgc_obd_ops, NULL, |
d7e09d03 PT |
1720 | LUSTRE_MGC_NAME, NULL); |
1721 | } | |
1722 | ||
1723 | static void /*__exit*/ mgc_exit(void) | |
1724 | { | |
1725 | class_unregister_type(LUSTRE_MGC_NAME); | |
1726 | } | |
1727 | ||
1728 | MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>"); | |
1729 | MODULE_DESCRIPTION("Lustre Management Client"); | |
1730 | MODULE_LICENSE("GPL"); | |
1731 | ||
1732 | module_init(mgc_init); | |
1733 | module_exit(mgc_exit); |