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) 2002, 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 #define DEBUG_SUBSYSTEM S_CLASS
37
38
39 #include "../include/obd_support.h"
40 #include "../include/obd.h"
41 #include "../include/lprocfs_status.h"
42 #include "../include/lustre/lustre_idl.h"
43 #include "../include/lustre_net.h"
44 #include "../include/obd_class.h"
45 #include "ptlrpc_internal.h"
46
47
48 static struct ll_rpc_opcode {
49 __u32 opcode;
50 const char *opname;
51 } ll_rpc_opcode_table[LUSTRE_MAX_OPCODES] = {
52 { OST_REPLY, "ost_reply" },
53 { OST_GETATTR, "ost_getattr" },
54 { OST_SETATTR, "ost_setattr" },
55 { OST_READ, "ost_read" },
56 { OST_WRITE, "ost_write" },
57 { OST_CREATE , "ost_create" },
58 { OST_DESTROY, "ost_destroy" },
59 { OST_GET_INFO, "ost_get_info" },
60 { OST_CONNECT, "ost_connect" },
61 { OST_DISCONNECT, "ost_disconnect" },
62 { OST_PUNCH, "ost_punch" },
63 { OST_OPEN, "ost_open" },
64 { OST_CLOSE, "ost_close" },
65 { OST_STATFS, "ost_statfs" },
66 { 14, NULL }, /* formerly OST_SAN_READ */
67 { 15, NULL }, /* formerly OST_SAN_WRITE */
68 { OST_SYNC, "ost_sync" },
69 { OST_SET_INFO, "ost_set_info" },
70 { OST_QUOTACHECK, "ost_quotacheck" },
71 { OST_QUOTACTL, "ost_quotactl" },
72 { OST_QUOTA_ADJUST_QUNIT, "ost_quota_adjust_qunit" },
73 { MDS_GETATTR, "mds_getattr" },
74 { MDS_GETATTR_NAME, "mds_getattr_lock" },
75 { MDS_CLOSE, "mds_close" },
76 { MDS_REINT, "mds_reint" },
77 { MDS_READPAGE, "mds_readpage" },
78 { MDS_CONNECT, "mds_connect" },
79 { MDS_DISCONNECT, "mds_disconnect" },
80 { MDS_GETSTATUS, "mds_getstatus" },
81 { MDS_STATFS, "mds_statfs" },
82 { MDS_PIN, "mds_pin" },
83 { MDS_UNPIN, "mds_unpin" },
84 { MDS_SYNC, "mds_sync" },
85 { MDS_DONE_WRITING, "mds_done_writing" },
86 { MDS_SET_INFO, "mds_set_info" },
87 { MDS_QUOTACHECK, "mds_quotacheck" },
88 { MDS_QUOTACTL, "mds_quotactl" },
89 { MDS_GETXATTR, "mds_getxattr" },
90 { MDS_SETXATTR, "mds_setxattr" },
91 { MDS_WRITEPAGE, "mds_writepage" },
92 { MDS_IS_SUBDIR, "mds_is_subdir" },
93 { MDS_GET_INFO, "mds_get_info" },
94 { MDS_HSM_STATE_GET, "mds_hsm_state_get" },
95 { MDS_HSM_STATE_SET, "mds_hsm_state_set" },
96 { MDS_HSM_ACTION, "mds_hsm_action" },
97 { MDS_HSM_PROGRESS, "mds_hsm_progress" },
98 { MDS_HSM_REQUEST, "mds_hsm_request" },
99 { MDS_HSM_CT_REGISTER, "mds_hsm_ct_register" },
100 { MDS_HSM_CT_UNREGISTER, "mds_hsm_ct_unregister" },
101 { MDS_SWAP_LAYOUTS, "mds_swap_layouts" },
102 { LDLM_ENQUEUE, "ldlm_enqueue" },
103 { LDLM_CONVERT, "ldlm_convert" },
104 { LDLM_CANCEL, "ldlm_cancel" },
105 { LDLM_BL_CALLBACK, "ldlm_bl_callback" },
106 { LDLM_CP_CALLBACK, "ldlm_cp_callback" },
107 { LDLM_GL_CALLBACK, "ldlm_gl_callback" },
108 { LDLM_SET_INFO, "ldlm_set_info" },
109 { MGS_CONNECT, "mgs_connect" },
110 { MGS_DISCONNECT, "mgs_disconnect" },
111 { MGS_EXCEPTION, "mgs_exception" },
112 { MGS_TARGET_REG, "mgs_target_reg" },
113 { MGS_TARGET_DEL, "mgs_target_del" },
114 { MGS_SET_INFO, "mgs_set_info" },
115 { MGS_CONFIG_READ, "mgs_config_read" },
116 { OBD_PING, "obd_ping" },
117 { OBD_LOG_CANCEL, "llog_cancel" },
118 { OBD_QC_CALLBACK, "obd_quota_callback" },
119 { OBD_IDX_READ, "dt_index_read" },
120 { LLOG_ORIGIN_HANDLE_CREATE, "llog_origin_handle_open" },
121 { LLOG_ORIGIN_HANDLE_NEXT_BLOCK, "llog_origin_handle_next_block" },
122 { LLOG_ORIGIN_HANDLE_READ_HEADER, "llog_origin_handle_read_header" },
123 { LLOG_ORIGIN_HANDLE_WRITE_REC, "llog_origin_handle_write_rec" },
124 { LLOG_ORIGIN_HANDLE_CLOSE, "llog_origin_handle_close" },
125 { LLOG_ORIGIN_CONNECT, "llog_origin_connect" },
126 { LLOG_CATINFO, "llog_catinfo" },
127 { LLOG_ORIGIN_HANDLE_PREV_BLOCK, "llog_origin_handle_prev_block" },
128 { LLOG_ORIGIN_HANDLE_DESTROY, "llog_origin_handle_destroy" },
129 { QUOTA_DQACQ, "quota_acquire" },
130 { QUOTA_DQREL, "quota_release" },
131 { SEQ_QUERY, "seq_query" },
132 { SEC_CTX_INIT, "sec_ctx_init" },
133 { SEC_CTX_INIT_CONT, "sec_ctx_init_cont" },
134 { SEC_CTX_FINI, "sec_ctx_fini" },
135 { FLD_QUERY, "fld_query" },
136 { UPDATE_OBJ, "update_obj" },
137 };
138
139 static struct ll_eopcode {
140 __u32 opcode;
141 const char *opname;
142 } ll_eopcode_table[EXTRA_LAST_OPC] = {
143 { LDLM_GLIMPSE_ENQUEUE, "ldlm_glimpse_enqueue" },
144 { LDLM_PLAIN_ENQUEUE, "ldlm_plain_enqueue" },
145 { LDLM_EXTENT_ENQUEUE, "ldlm_extent_enqueue" },
146 { LDLM_FLOCK_ENQUEUE, "ldlm_flock_enqueue" },
147 { LDLM_IBITS_ENQUEUE, "ldlm_ibits_enqueue" },
148 { MDS_REINT_SETATTR, "mds_reint_setattr" },
149 { MDS_REINT_CREATE, "mds_reint_create" },
150 { MDS_REINT_LINK, "mds_reint_link" },
151 { MDS_REINT_UNLINK, "mds_reint_unlink" },
152 { MDS_REINT_RENAME, "mds_reint_rename" },
153 { MDS_REINT_OPEN, "mds_reint_open" },
154 { MDS_REINT_SETXATTR, "mds_reint_setxattr" },
155 { BRW_READ_BYTES, "read_bytes" },
156 { BRW_WRITE_BYTES, "write_bytes" },
157 };
158
ll_opcode2str(__u32 opcode)159 const char *ll_opcode2str(__u32 opcode)
160 {
161 /* When one of the assertions below fail, chances are that:
162 * 1) A new opcode was added in include/lustre/lustre_idl.h,
163 * but is missing from the table above.
164 * or 2) The opcode space was renumbered or rearranged,
165 * and the opcode_offset() function in
166 * ptlrpc_internal.h needs to be modified.
167 */
168 __u32 offset = opcode_offset(opcode);
169 LASSERTF(offset < LUSTRE_MAX_OPCODES,
170 "offset %u >= LUSTRE_MAX_OPCODES %u\n",
171 offset, LUSTRE_MAX_OPCODES);
172 LASSERTF(ll_rpc_opcode_table[offset].opcode == opcode,
173 "ll_rpc_opcode_table[%u].opcode %u != opcode %u\n",
174 offset, ll_rpc_opcode_table[offset].opcode, opcode);
175 return ll_rpc_opcode_table[offset].opname;
176 }
177
ll_eopcode2str(__u32 opcode)178 static const char *ll_eopcode2str(__u32 opcode)
179 {
180 LASSERT(ll_eopcode_table[opcode].opcode == opcode);
181 return ll_eopcode_table[opcode].opname;
182 }
183
184 #if defined(CONFIG_PROC_FS)
ptlrpc_lprocfs_register(struct proc_dir_entry * root,char * dir,char * name,struct proc_dir_entry ** procroot_ret,struct lprocfs_stats ** stats_ret)185 static void ptlrpc_lprocfs_register(struct proc_dir_entry *root, char *dir,
186 char *name,
187 struct proc_dir_entry **procroot_ret,
188 struct lprocfs_stats **stats_ret)
189 {
190 struct proc_dir_entry *svc_procroot;
191 struct lprocfs_stats *svc_stats;
192 int i, rc;
193 unsigned int svc_counter_config = LPROCFS_CNTR_AVGMINMAX |
194 LPROCFS_CNTR_STDDEV;
195
196 LASSERT(*procroot_ret == NULL);
197 LASSERT(*stats_ret == NULL);
198
199 svc_stats = lprocfs_alloc_stats(EXTRA_MAX_OPCODES+LUSTRE_MAX_OPCODES,
200 0);
201 if (svc_stats == NULL)
202 return;
203
204 if (dir) {
205 svc_procroot = lprocfs_register(dir, root, NULL, NULL);
206 if (IS_ERR(svc_procroot)) {
207 lprocfs_free_stats(&svc_stats);
208 return;
209 }
210 } else {
211 svc_procroot = root;
212 }
213
214 lprocfs_counter_init(svc_stats, PTLRPC_REQWAIT_CNTR,
215 svc_counter_config, "req_waittime", "usec");
216 lprocfs_counter_init(svc_stats, PTLRPC_REQQDEPTH_CNTR,
217 svc_counter_config, "req_qdepth", "reqs");
218 lprocfs_counter_init(svc_stats, PTLRPC_REQACTIVE_CNTR,
219 svc_counter_config, "req_active", "reqs");
220 lprocfs_counter_init(svc_stats, PTLRPC_TIMEOUT,
221 svc_counter_config, "req_timeout", "sec");
222 lprocfs_counter_init(svc_stats, PTLRPC_REQBUF_AVAIL_CNTR,
223 svc_counter_config, "reqbuf_avail", "bufs");
224 for (i = 0; i < EXTRA_LAST_OPC; i++) {
225 char *units;
226
227 switch (i) {
228 case BRW_WRITE_BYTES:
229 case BRW_READ_BYTES:
230 units = "bytes";
231 break;
232 default:
233 units = "reqs";
234 break;
235 }
236 lprocfs_counter_init(svc_stats, PTLRPC_LAST_CNTR + i,
237 svc_counter_config,
238 ll_eopcode2str(i), units);
239 }
240 for (i = 0; i < LUSTRE_MAX_OPCODES; i++) {
241 __u32 opcode = ll_rpc_opcode_table[i].opcode;
242 lprocfs_counter_init(svc_stats,
243 EXTRA_MAX_OPCODES + i, svc_counter_config,
244 ll_opcode2str(opcode), "usec");
245 }
246
247 rc = lprocfs_register_stats(svc_procroot, name, svc_stats);
248 if (rc < 0) {
249 if (dir)
250 lprocfs_remove(&svc_procroot);
251 lprocfs_free_stats(&svc_stats);
252 } else {
253 if (dir)
254 *procroot_ret = svc_procroot;
255 *stats_ret = svc_stats;
256 }
257 }
258
259 static int
ptlrpc_lprocfs_req_history_len_seq_show(struct seq_file * m,void * v)260 ptlrpc_lprocfs_req_history_len_seq_show(struct seq_file *m, void *v)
261 {
262 struct ptlrpc_service *svc = m->private;
263 struct ptlrpc_service_part *svcpt;
264 int total = 0;
265 int i;
266
267 ptlrpc_service_for_each_part(svcpt, i, svc)
268 total += svcpt->scp_hist_nrqbds;
269
270 seq_printf(m, "%d\n", total);
271 return 0;
272 }
273 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_req_history_len);
274
275 static int
ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file * m,void * n)276 ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file *m, void *n)
277 {
278 struct ptlrpc_service *svc = m->private;
279 struct ptlrpc_service_part *svcpt;
280 int total = 0;
281 int i;
282
283 ptlrpc_service_for_each_part(svcpt, i, svc)
284 total += svc->srv_hist_nrqbds_cpt_max;
285
286 seq_printf(m, "%d\n", total);
287 return 0;
288 }
289
290 static ssize_t
ptlrpc_lprocfs_req_history_max_seq_write(struct file * file,const char __user * buffer,size_t count,loff_t * off)291 ptlrpc_lprocfs_req_history_max_seq_write(struct file *file,
292 const char __user *buffer,
293 size_t count, loff_t *off)
294 {
295 struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
296 int bufpages;
297 int val;
298 int rc;
299
300 rc = lprocfs_write_helper(buffer, count, &val);
301 if (rc < 0)
302 return rc;
303
304 if (val < 0)
305 return -ERANGE;
306
307 /* This sanity check is more of an insanity check; we can still
308 * hose a kernel by allowing the request history to grow too
309 * far. */
310 bufpages = (svc->srv_buf_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
311 if (val > totalram_pages / (2 * bufpages))
312 return -ERANGE;
313
314 spin_lock(&svc->srv_lock);
315
316 if (val == 0)
317 svc->srv_hist_nrqbds_cpt_max = 0;
318 else
319 svc->srv_hist_nrqbds_cpt_max = max(1, (val / svc->srv_ncpts));
320
321 spin_unlock(&svc->srv_lock);
322
323 return count;
324 }
325 LPROC_SEQ_FOPS(ptlrpc_lprocfs_req_history_max);
326
327 static int
ptlrpc_lprocfs_threads_min_seq_show(struct seq_file * m,void * n)328 ptlrpc_lprocfs_threads_min_seq_show(struct seq_file *m, void *n)
329 {
330 struct ptlrpc_service *svc = m->private;
331
332 seq_printf(m, "%d\n", svc->srv_nthrs_cpt_init * svc->srv_ncpts);
333 return 0;
334 }
335
336 static ssize_t
ptlrpc_lprocfs_threads_min_seq_write(struct file * file,const char __user * buffer,size_t count,loff_t * off)337 ptlrpc_lprocfs_threads_min_seq_write(struct file *file,
338 const char __user *buffer,
339 size_t count, loff_t *off)
340 {
341 struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
342 int val;
343 int rc = lprocfs_write_helper(buffer, count, &val);
344
345 if (rc < 0)
346 return rc;
347
348 if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
349 return -ERANGE;
350
351 spin_lock(&svc->srv_lock);
352 if (val > svc->srv_nthrs_cpt_limit * svc->srv_ncpts) {
353 spin_unlock(&svc->srv_lock);
354 return -ERANGE;
355 }
356
357 svc->srv_nthrs_cpt_init = val / svc->srv_ncpts;
358
359 spin_unlock(&svc->srv_lock);
360
361 return count;
362 }
363 LPROC_SEQ_FOPS(ptlrpc_lprocfs_threads_min);
364
365 static int
ptlrpc_lprocfs_threads_started_seq_show(struct seq_file * m,void * n)366 ptlrpc_lprocfs_threads_started_seq_show(struct seq_file *m, void *n)
367 {
368 struct ptlrpc_service *svc = m->private;
369 struct ptlrpc_service_part *svcpt;
370 int total = 0;
371 int i;
372
373 ptlrpc_service_for_each_part(svcpt, i, svc)
374 total += svcpt->scp_nthrs_running;
375
376 seq_printf(m, "%d\n", total);
377 return 0;
378 }
379 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_threads_started);
380
381 static int
ptlrpc_lprocfs_threads_max_seq_show(struct seq_file * m,void * n)382 ptlrpc_lprocfs_threads_max_seq_show(struct seq_file *m, void *n)
383 {
384 struct ptlrpc_service *svc = m->private;
385
386 seq_printf(m, "%d\n", svc->srv_nthrs_cpt_limit * svc->srv_ncpts);
387 return 0;
388 }
389
390 static ssize_t
ptlrpc_lprocfs_threads_max_seq_write(struct file * file,const char __user * buffer,size_t count,loff_t * off)391 ptlrpc_lprocfs_threads_max_seq_write(struct file *file,
392 const char __user *buffer,
393 size_t count, loff_t *off)
394 {
395 struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
396 int val;
397 int rc = lprocfs_write_helper(buffer, count, &val);
398
399 if (rc < 0)
400 return rc;
401
402 if (val / svc->srv_ncpts < PTLRPC_NTHRS_INIT)
403 return -ERANGE;
404
405 spin_lock(&svc->srv_lock);
406 if (val < svc->srv_nthrs_cpt_init * svc->srv_ncpts) {
407 spin_unlock(&svc->srv_lock);
408 return -ERANGE;
409 }
410
411 svc->srv_nthrs_cpt_limit = val / svc->srv_ncpts;
412
413 spin_unlock(&svc->srv_lock);
414
415 return count;
416 }
417 LPROC_SEQ_FOPS(ptlrpc_lprocfs_threads_max);
418
419 /**
420 * \addtogoup nrs
421 * @{
422 */
423 extern struct nrs_core nrs_core;
424
425 /**
426 * Translates \e ptlrpc_nrs_pol_state values to human-readable strings.
427 *
428 * \param[in] state The policy state
429 */
nrs_state2str(enum ptlrpc_nrs_pol_state state)430 static const char *nrs_state2str(enum ptlrpc_nrs_pol_state state)
431 {
432 switch (state) {
433 default:
434 LBUG();
435 case NRS_POL_STATE_INVALID:
436 return "invalid";
437 case NRS_POL_STATE_STOPPED:
438 return "stopped";
439 case NRS_POL_STATE_STOPPING:
440 return "stopping";
441 case NRS_POL_STATE_STARTING:
442 return "starting";
443 case NRS_POL_STATE_STARTED:
444 return "started";
445 }
446 }
447
448 /**
449 * Obtains status information for \a policy.
450 *
451 * Information is copied in \a info.
452 *
453 * \param[in] policy The policy
454 * \param[out] info Holds returned status information
455 */
nrs_policy_get_info_locked(struct ptlrpc_nrs_policy * policy,struct ptlrpc_nrs_pol_info * info)456 void nrs_policy_get_info_locked(struct ptlrpc_nrs_policy *policy,
457 struct ptlrpc_nrs_pol_info *info)
458 {
459 LASSERT(policy != NULL);
460 LASSERT(info != NULL);
461 assert_spin_locked(&policy->pol_nrs->nrs_lock);
462
463 memcpy(info->pi_name, policy->pol_desc->pd_name, NRS_POL_NAME_MAX);
464
465 info->pi_fallback = !!(policy->pol_flags & PTLRPC_NRS_FL_FALLBACK);
466 info->pi_state = policy->pol_state;
467 /**
468 * XXX: These are accessed without holding
469 * ptlrpc_service_part::scp_req_lock.
470 */
471 info->pi_req_queued = policy->pol_req_queued;
472 info->pi_req_started = policy->pol_req_started;
473 }
474
475 /**
476 * Reads and prints policy status information for all policies of a PTLRPC
477 * service.
478 */
ptlrpc_lprocfs_nrs_seq_show(struct seq_file * m,void * n)479 static int ptlrpc_lprocfs_nrs_seq_show(struct seq_file *m, void *n)
480 {
481 struct ptlrpc_service *svc = m->private;
482 struct ptlrpc_service_part *svcpt;
483 struct ptlrpc_nrs *nrs;
484 struct ptlrpc_nrs_policy *policy;
485 struct ptlrpc_nrs_pol_info *infos;
486 struct ptlrpc_nrs_pol_info tmp;
487 unsigned num_pols;
488 unsigned pol_idx = 0;
489 bool hp = false;
490 int i;
491 int rc = 0;
492
493 /**
494 * Serialize NRS core lprocfs operations with policy registration/
495 * unregistration.
496 */
497 mutex_lock(&nrs_core.nrs_mutex);
498
499 /**
500 * Use the first service partition's regular NRS head in order to obtain
501 * the number of policies registered with NRS heads of this service. All
502 * service partitions will have the same number of policies.
503 */
504 nrs = nrs_svcpt2nrs(svc->srv_parts[0], false);
505
506 spin_lock(&nrs->nrs_lock);
507 num_pols = svc->srv_parts[0]->scp_nrs_reg.nrs_num_pols;
508 spin_unlock(&nrs->nrs_lock);
509
510 OBD_ALLOC(infos, num_pols * sizeof(*infos));
511 if (infos == NULL) {
512 rc = -ENOMEM;
513 goto out;
514 }
515 again:
516
517 ptlrpc_service_for_each_part(svcpt, i, svc) {
518 nrs = nrs_svcpt2nrs(svcpt, hp);
519 spin_lock(&nrs->nrs_lock);
520
521 pol_idx = 0;
522
523 list_for_each_entry(policy, &nrs->nrs_policy_list,
524 pol_list) {
525 LASSERT(pol_idx < num_pols);
526
527 nrs_policy_get_info_locked(policy, &tmp);
528 /**
529 * Copy values when handling the first service
530 * partition.
531 */
532 if (i == 0) {
533 memcpy(infos[pol_idx].pi_name, tmp.pi_name,
534 NRS_POL_NAME_MAX);
535 memcpy(&infos[pol_idx].pi_state, &tmp.pi_state,
536 sizeof(tmp.pi_state));
537 infos[pol_idx].pi_fallback = tmp.pi_fallback;
538 /**
539 * For the rest of the service partitions
540 * sanity-check the values we get.
541 */
542 } else {
543 LASSERT(strncmp(infos[pol_idx].pi_name,
544 tmp.pi_name,
545 NRS_POL_NAME_MAX) == 0);
546 /**
547 * Not asserting ptlrpc_nrs_pol_info::pi_state,
548 * because it may be different between
549 * instances of the same policy in different
550 * service partitions.
551 */
552 LASSERT(infos[pol_idx].pi_fallback ==
553 tmp.pi_fallback);
554 }
555
556 infos[pol_idx].pi_req_queued += tmp.pi_req_queued;
557 infos[pol_idx].pi_req_started += tmp.pi_req_started;
558
559 pol_idx++;
560 }
561 spin_unlock(&nrs->nrs_lock);
562 }
563
564 /**
565 * Policy status information output is in YAML format.
566 * For example:
567 *
568 * regular_requests:
569 * - name: fifo
570 * state: started
571 * fallback: yes
572 * queued: 0
573 * active: 0
574 *
575 * - name: crrn
576 * state: started
577 * fallback: no
578 * queued: 2015
579 * active: 384
580 *
581 * high_priority_requests:
582 * - name: fifo
583 * state: started
584 * fallback: yes
585 * queued: 0
586 * active: 2
587 *
588 * - name: crrn
589 * state: stopped
590 * fallback: no
591 * queued: 0
592 * active: 0
593 */
594 seq_printf(m, "%s\n",
595 !hp ? "\nregular_requests:" : "high_priority_requests:");
596
597 for (pol_idx = 0; pol_idx < num_pols; pol_idx++) {
598 seq_printf(m, " - name: %s\n"
599 " state: %s\n"
600 " fallback: %s\n"
601 " queued: %-20d\n"
602 " active: %-20d\n\n",
603 infos[pol_idx].pi_name,
604 nrs_state2str(infos[pol_idx].pi_state),
605 infos[pol_idx].pi_fallback ? "yes" : "no",
606 (int)infos[pol_idx].pi_req_queued,
607 (int)infos[pol_idx].pi_req_started);
608 }
609
610 if (!hp && nrs_svc_has_hp(svc)) {
611 memset(infos, 0, num_pols * sizeof(*infos));
612
613 /**
614 * Redo the processing for the service's HP NRS heads' policies.
615 */
616 hp = true;
617 goto again;
618 }
619
620 out:
621 if (infos)
622 OBD_FREE(infos, num_pols * sizeof(*infos));
623
624 mutex_unlock(&nrs_core.nrs_mutex);
625
626 return rc;
627 }
628
629 /**
630 * The longest valid command string is the maximum policy name size, plus the
631 * length of the " reg" substring
632 */
633 #define LPROCFS_NRS_WR_MAX_CMD (NRS_POL_NAME_MAX + sizeof(" reg") - 1)
634
635 /**
636 * Starts and stops a given policy on a PTLRPC service.
637 *
638 * Commands consist of the policy name, followed by an optional [reg|hp] token;
639 * if the optional token is omitted, the operation is performed on both the
640 * regular and high-priority (if the service has one) NRS head.
641 */
ptlrpc_lprocfs_nrs_seq_write(struct file * file,const char __user * buffer,size_t count,loff_t * off)642 static ssize_t ptlrpc_lprocfs_nrs_seq_write(struct file *file,
643 const char __user *buffer,
644 size_t count, loff_t *off)
645 {
646 struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
647 enum ptlrpc_nrs_queue_type queue = PTLRPC_NRS_QUEUE_BOTH;
648 char *cmd;
649 char *cmd_copy = NULL;
650 char *token;
651 int rc = 0;
652
653 if (count >= LPROCFS_NRS_WR_MAX_CMD) {
654 rc = -EINVAL;
655 goto out;
656 }
657
658 OBD_ALLOC(cmd, LPROCFS_NRS_WR_MAX_CMD);
659 if (cmd == NULL) {
660 rc = -ENOMEM;
661 goto out;
662 }
663 /**
664 * strsep() modifies its argument, so keep a copy
665 */
666 cmd_copy = cmd;
667
668 if (copy_from_user(cmd, buffer, count)) {
669 rc = -EFAULT;
670 goto out;
671 }
672
673 cmd[count] = '\0';
674
675 token = strsep(&cmd, " ");
676
677 if (strlen(token) > NRS_POL_NAME_MAX - 1) {
678 rc = -EINVAL;
679 goto out;
680 }
681
682 /**
683 * No [reg|hp] token has been specified
684 */
685 if (cmd == NULL)
686 goto default_queue;
687
688 /**
689 * The second token is either NULL, or an optional [reg|hp] string
690 */
691 if (strcmp(cmd, "reg") == 0)
692 queue = PTLRPC_NRS_QUEUE_REG;
693 else if (strcmp(cmd, "hp") == 0)
694 queue = PTLRPC_NRS_QUEUE_HP;
695 else {
696 rc = -EINVAL;
697 goto out;
698 }
699
700 default_queue:
701
702 if (queue == PTLRPC_NRS_QUEUE_HP && !nrs_svc_has_hp(svc)) {
703 rc = -ENODEV;
704 goto out;
705 } else if (queue == PTLRPC_NRS_QUEUE_BOTH && !nrs_svc_has_hp(svc))
706 queue = PTLRPC_NRS_QUEUE_REG;
707
708 /**
709 * Serialize NRS core lprocfs operations with policy registration/
710 * unregistration.
711 */
712 mutex_lock(&nrs_core.nrs_mutex);
713
714 rc = ptlrpc_nrs_policy_control(svc, queue, token, PTLRPC_NRS_CTL_START,
715 false, NULL);
716
717 mutex_unlock(&nrs_core.nrs_mutex);
718 out:
719 if (cmd_copy)
720 OBD_FREE(cmd_copy, LPROCFS_NRS_WR_MAX_CMD);
721
722 return rc < 0 ? rc : count;
723 }
724 LPROC_SEQ_FOPS(ptlrpc_lprocfs_nrs);
725
726 /** @} nrs */
727
728 struct ptlrpc_srh_iterator {
729 int srhi_idx;
730 __u64 srhi_seq;
731 struct ptlrpc_request *srhi_req;
732 };
733
734 static int
ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part * svcpt,struct ptlrpc_srh_iterator * srhi,__u64 seq)735 ptlrpc_lprocfs_svc_req_history_seek(struct ptlrpc_service_part *svcpt,
736 struct ptlrpc_srh_iterator *srhi,
737 __u64 seq)
738 {
739 struct list_head *e;
740 struct ptlrpc_request *req;
741
742 if (srhi->srhi_req != NULL &&
743 srhi->srhi_seq > svcpt->scp_hist_seq_culled &&
744 srhi->srhi_seq <= seq) {
745 /* If srhi_req was set previously, hasn't been culled and
746 * we're searching for a seq on or after it (i.e. more
747 * recent), search from it onwards.
748 * Since the service history is LRU (i.e. culled reqs will
749 * be near the head), we shouldn't have to do long
750 * re-scans */
751 LASSERTF(srhi->srhi_seq == srhi->srhi_req->rq_history_seq,
752 "%s:%d: seek seq %llu, request seq %llu\n",
753 svcpt->scp_service->srv_name, svcpt->scp_cpt,
754 srhi->srhi_seq, srhi->srhi_req->rq_history_seq);
755 LASSERTF(!list_empty(&svcpt->scp_hist_reqs),
756 "%s:%d: seek offset %llu, request seq %llu, last culled %llu\n",
757 svcpt->scp_service->srv_name, svcpt->scp_cpt,
758 seq, srhi->srhi_seq, svcpt->scp_hist_seq_culled);
759 e = &srhi->srhi_req->rq_history_list;
760 } else {
761 /* search from start */
762 e = svcpt->scp_hist_reqs.next;
763 }
764
765 while (e != &svcpt->scp_hist_reqs) {
766 req = list_entry(e, struct ptlrpc_request, rq_history_list);
767
768 if (req->rq_history_seq >= seq) {
769 srhi->srhi_seq = req->rq_history_seq;
770 srhi->srhi_req = req;
771 return 0;
772 }
773 e = e->next;
774 }
775
776 return -ENOENT;
777 }
778
779 /*
780 * ptlrpc history sequence is used as "position" of seq_file, in some case,
781 * seq_read() will increase "position" to indicate reading the next
782 * element, however, low bits of history sequence are reserved for CPT id
783 * (check the details from comments before ptlrpc_req_add_history), which
784 * means seq_read() might change CPT id of history sequence and never
785 * finish reading of requests on a CPT. To make it work, we have to shift
786 * CPT id to high bits and timestamp to low bits, so seq_read() will only
787 * increase timestamp which can correctly indicate the next position.
788 */
789
790 /* convert seq_file pos to cpt */
791 #define PTLRPC_REQ_POS2CPT(svc, pos) \
792 ((svc)->srv_cpt_bits == 0 ? 0 : \
793 (__u64)(pos) >> (64 - (svc)->srv_cpt_bits))
794
795 /* make up seq_file pos from cpt */
796 #define PTLRPC_REQ_CPT2POS(svc, cpt) \
797 ((svc)->srv_cpt_bits == 0 ? 0 : \
798 (cpt) << (64 - (svc)->srv_cpt_bits))
799
800 /* convert sequence to position */
801 #define PTLRPC_REQ_SEQ2POS(svc, seq) \
802 ((svc)->srv_cpt_bits == 0 ? (seq) : \
803 ((seq) >> (svc)->srv_cpt_bits) | \
804 ((seq) << (64 - (svc)->srv_cpt_bits)))
805
806 /* convert position to sequence */
807 #define PTLRPC_REQ_POS2SEQ(svc, pos) \
808 ((svc)->srv_cpt_bits == 0 ? (pos) : \
809 ((__u64)(pos) << (svc)->srv_cpt_bits) | \
810 ((__u64)(pos) >> (64 - (svc)->srv_cpt_bits)))
811
812 static void *
ptlrpc_lprocfs_svc_req_history_start(struct seq_file * s,loff_t * pos)813 ptlrpc_lprocfs_svc_req_history_start(struct seq_file *s, loff_t *pos)
814 {
815 struct ptlrpc_service *svc = s->private;
816 struct ptlrpc_service_part *svcpt;
817 struct ptlrpc_srh_iterator *srhi;
818 unsigned int cpt;
819 int rc;
820 int i;
821
822 if (sizeof(loff_t) != sizeof(__u64)) { /* can't support */
823 CWARN("Failed to read request history because size of loff_t %d can't match size of u64\n",
824 (int)sizeof(loff_t));
825 return NULL;
826 }
827
828 OBD_ALLOC(srhi, sizeof(*srhi));
829 if (srhi == NULL)
830 return NULL;
831
832 srhi->srhi_seq = 0;
833 srhi->srhi_req = NULL;
834
835 cpt = PTLRPC_REQ_POS2CPT(svc, *pos);
836
837 ptlrpc_service_for_each_part(svcpt, i, svc) {
838 if (i < cpt) /* skip */
839 continue;
840 if (i > cpt) /* make up the lowest position for this CPT */
841 *pos = PTLRPC_REQ_CPT2POS(svc, i);
842
843 spin_lock(&svcpt->scp_lock);
844 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi,
845 PTLRPC_REQ_POS2SEQ(svc, *pos));
846 spin_unlock(&svcpt->scp_lock);
847 if (rc == 0) {
848 *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
849 srhi->srhi_idx = i;
850 return srhi;
851 }
852 }
853
854 OBD_FREE(srhi, sizeof(*srhi));
855 return NULL;
856 }
857
858 static void
ptlrpc_lprocfs_svc_req_history_stop(struct seq_file * s,void * iter)859 ptlrpc_lprocfs_svc_req_history_stop(struct seq_file *s, void *iter)
860 {
861 struct ptlrpc_srh_iterator *srhi = iter;
862
863 if (srhi != NULL)
864 OBD_FREE(srhi, sizeof(*srhi));
865 }
866
867 static void *
ptlrpc_lprocfs_svc_req_history_next(struct seq_file * s,void * iter,loff_t * pos)868 ptlrpc_lprocfs_svc_req_history_next(struct seq_file *s,
869 void *iter, loff_t *pos)
870 {
871 struct ptlrpc_service *svc = s->private;
872 struct ptlrpc_srh_iterator *srhi = iter;
873 struct ptlrpc_service_part *svcpt;
874 __u64 seq;
875 int rc;
876 int i;
877
878 for (i = srhi->srhi_idx; i < svc->srv_ncpts; i++) {
879 svcpt = svc->srv_parts[i];
880
881 if (i > srhi->srhi_idx) { /* reset iterator for a new CPT */
882 srhi->srhi_req = NULL;
883 seq = srhi->srhi_seq = 0;
884 } else { /* the next sequence */
885 seq = srhi->srhi_seq + (1 << svc->srv_cpt_bits);
886 }
887
888 spin_lock(&svcpt->scp_lock);
889 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, seq);
890 spin_unlock(&svcpt->scp_lock);
891 if (rc == 0) {
892 *pos = PTLRPC_REQ_SEQ2POS(svc, srhi->srhi_seq);
893 srhi->srhi_idx = i;
894 return srhi;
895 }
896 }
897
898 OBD_FREE(srhi, sizeof(*srhi));
899 return NULL;
900 }
901
902 /* common ost/mdt so_req_printer */
target_print_req(void * seq_file,struct ptlrpc_request * req)903 void target_print_req(void *seq_file, struct ptlrpc_request *req)
904 {
905 /* Called holding srv_lock with irqs disabled.
906 * Print specific req contents and a newline.
907 * CAVEAT EMPTOR: check request message length before printing!!!
908 * You might have received any old crap so you must be just as
909 * careful here as the service's request parser!!! */
910 struct seq_file *sf = seq_file;
911
912 switch (req->rq_phase) {
913 case RQ_PHASE_NEW:
914 /* still awaiting a service thread's attention, or rejected
915 * because the generic request message didn't unpack */
916 seq_printf(sf, "<not swabbed>\n");
917 break;
918 case RQ_PHASE_INTERPRET:
919 /* being handled, so basic msg swabbed, and opc is valid
920 * but racing with mds_handle() */
921 case RQ_PHASE_COMPLETE:
922 /* been handled by mds_handle() reply state possibly still
923 * volatile */
924 seq_printf(sf, "opc %d\n", lustre_msg_get_opc(req->rq_reqmsg));
925 break;
926 default:
927 DEBUG_REQ(D_ERROR, req, "bad phase %d", req->rq_phase);
928 }
929 }
930 EXPORT_SYMBOL(target_print_req);
931
ptlrpc_lprocfs_svc_req_history_show(struct seq_file * s,void * iter)932 static int ptlrpc_lprocfs_svc_req_history_show(struct seq_file *s, void *iter)
933 {
934 struct ptlrpc_service *svc = s->private;
935 struct ptlrpc_srh_iterator *srhi = iter;
936 struct ptlrpc_service_part *svcpt;
937 struct ptlrpc_request *req;
938 int rc;
939
940 LASSERT(srhi->srhi_idx < svc->srv_ncpts);
941
942 svcpt = svc->srv_parts[srhi->srhi_idx];
943
944 spin_lock(&svcpt->scp_lock);
945
946 rc = ptlrpc_lprocfs_svc_req_history_seek(svcpt, srhi, srhi->srhi_seq);
947
948 if (rc == 0) {
949 req = srhi->srhi_req;
950
951 /* Print common req fields.
952 * CAVEAT EMPTOR: we're racing with the service handler
953 * here. The request could contain any old crap, so you
954 * must be just as careful as the service's request
955 * parser. Currently I only print stuff here I know is OK
956 * to look at coz it was set up in request_in_callback()!!! */
957 seq_printf(s, "%lld:%s:%s:x%llu:%d:%s:%ld:%lds(%+lds) ",
958 req->rq_history_seq, libcfs_nid2str(req->rq_self),
959 libcfs_id2str(req->rq_peer), req->rq_xid,
960 req->rq_reqlen, ptlrpc_rqphase2str(req),
961 req->rq_arrival_time.tv_sec,
962 req->rq_sent - req->rq_arrival_time.tv_sec,
963 req->rq_sent - req->rq_deadline);
964 if (svc->srv_ops.so_req_printer == NULL)
965 seq_printf(s, "\n");
966 else
967 svc->srv_ops.so_req_printer(s, srhi->srhi_req);
968 }
969
970 spin_unlock(&svcpt->scp_lock);
971 return rc;
972 }
973
974 static int
ptlrpc_lprocfs_svc_req_history_open(struct inode * inode,struct file * file)975 ptlrpc_lprocfs_svc_req_history_open(struct inode *inode, struct file *file)
976 {
977 static struct seq_operations sops = {
978 .start = ptlrpc_lprocfs_svc_req_history_start,
979 .stop = ptlrpc_lprocfs_svc_req_history_stop,
980 .next = ptlrpc_lprocfs_svc_req_history_next,
981 .show = ptlrpc_lprocfs_svc_req_history_show,
982 };
983 struct seq_file *seqf;
984 int rc;
985
986 rc = seq_open(file, &sops);
987 if (rc)
988 return rc;
989
990 seqf = file->private_data;
991 seqf->private = PDE_DATA(inode);
992 return 0;
993 }
994
995 /* See also lprocfs_rd_timeouts */
ptlrpc_lprocfs_timeouts_seq_show(struct seq_file * m,void * n)996 static int ptlrpc_lprocfs_timeouts_seq_show(struct seq_file *m, void *n)
997 {
998 struct ptlrpc_service *svc = m->private;
999 struct ptlrpc_service_part *svcpt;
1000 struct dhms ts;
1001 time_t worstt;
1002 unsigned int cur;
1003 unsigned int worst;
1004 int i;
1005
1006 if (AT_OFF) {
1007 seq_printf(m, "adaptive timeouts off, using obd_timeout %u\n",
1008 obd_timeout);
1009 return 0;
1010 }
1011
1012 ptlrpc_service_for_each_part(svcpt, i, svc) {
1013 cur = at_get(&svcpt->scp_at_estimate);
1014 worst = svcpt->scp_at_estimate.at_worst_ever;
1015 worstt = svcpt->scp_at_estimate.at_worst_time;
1016 s2dhms(&ts, get_seconds() - worstt);
1017
1018 seq_printf(m, "%10s : cur %3u worst %3u (at %ld, "
1019 DHMS_FMT" ago) ", "service",
1020 cur, worst, worstt, DHMS_VARS(&ts));
1021
1022 lprocfs_at_hist_helper(m, &svcpt->scp_at_estimate);
1023 }
1024
1025 return 0;
1026 }
1027 LPROC_SEQ_FOPS_RO(ptlrpc_lprocfs_timeouts);
1028
ptlrpc_lprocfs_hp_ratio_seq_show(struct seq_file * m,void * v)1029 static int ptlrpc_lprocfs_hp_ratio_seq_show(struct seq_file *m, void *v)
1030 {
1031 struct ptlrpc_service *svc = m->private;
1032 seq_printf(m, "%d", svc->srv_hpreq_ratio);
1033 return 0;
1034 }
1035
ptlrpc_lprocfs_hp_ratio_seq_write(struct file * file,const char __user * buffer,size_t count,loff_t * off)1036 static ssize_t ptlrpc_lprocfs_hp_ratio_seq_write(struct file *file,
1037 const char __user *buffer,
1038 size_t count,
1039 loff_t *off)
1040 {
1041 struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
1042 int rc;
1043 int val;
1044
1045 rc = lprocfs_write_helper(buffer, count, &val);
1046 if (rc < 0)
1047 return rc;
1048
1049 if (val < 0)
1050 return -ERANGE;
1051
1052 spin_lock(&svc->srv_lock);
1053 svc->srv_hpreq_ratio = val;
1054 spin_unlock(&svc->srv_lock);
1055
1056 return count;
1057 }
1058 LPROC_SEQ_FOPS(ptlrpc_lprocfs_hp_ratio);
1059
ptlrpc_lprocfs_register_service(struct proc_dir_entry * entry,struct ptlrpc_service * svc)1060 void ptlrpc_lprocfs_register_service(struct proc_dir_entry *entry,
1061 struct ptlrpc_service *svc)
1062 {
1063 struct lprocfs_vars lproc_vars[] = {
1064 {.name = "high_priority_ratio",
1065 .fops = &ptlrpc_lprocfs_hp_ratio_fops,
1066 .data = svc},
1067 {.name = "req_buffer_history_len",
1068 .fops = &ptlrpc_lprocfs_req_history_len_fops,
1069 .data = svc},
1070 {.name = "req_buffer_history_max",
1071 .fops = &ptlrpc_lprocfs_req_history_max_fops,
1072 .data = svc},
1073 {.name = "threads_min",
1074 .fops = &ptlrpc_lprocfs_threads_min_fops,
1075 .data = svc},
1076 {.name = "threads_max",
1077 .fops = &ptlrpc_lprocfs_threads_max_fops,
1078 .data = svc},
1079 {.name = "threads_started",
1080 .fops = &ptlrpc_lprocfs_threads_started_fops,
1081 .data = svc},
1082 {.name = "timeouts",
1083 .fops = &ptlrpc_lprocfs_timeouts_fops,
1084 .data = svc},
1085 {.name = "nrs_policies",
1086 .fops = &ptlrpc_lprocfs_nrs_fops,
1087 .data = svc},
1088 {NULL}
1089 };
1090 static const struct file_operations req_history_fops = {
1091 .owner = THIS_MODULE,
1092 .open = ptlrpc_lprocfs_svc_req_history_open,
1093 .read = seq_read,
1094 .llseek = seq_lseek,
1095 .release = lprocfs_seq_release,
1096 };
1097
1098 int rc;
1099
1100 ptlrpc_lprocfs_register(entry, svc->srv_name,
1101 "stats", &svc->srv_procroot,
1102 &svc->srv_stats);
1103
1104 if (svc->srv_procroot == NULL)
1105 return;
1106
1107 lprocfs_add_vars(svc->srv_procroot, lproc_vars, NULL);
1108
1109 rc = lprocfs_seq_create(svc->srv_procroot, "req_history",
1110 0400, &req_history_fops, svc);
1111 if (rc)
1112 CWARN("Error adding the req_history file\n");
1113 }
1114
ptlrpc_lprocfs_register_obd(struct obd_device * obddev)1115 void ptlrpc_lprocfs_register_obd(struct obd_device *obddev)
1116 {
1117 ptlrpc_lprocfs_register(obddev->obd_proc_entry, NULL, "stats",
1118 &obddev->obd_svc_procroot,
1119 &obddev->obd_svc_stats);
1120 }
1121 EXPORT_SYMBOL(ptlrpc_lprocfs_register_obd);
1122
ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request * req,long amount)1123 void ptlrpc_lprocfs_rpc_sent(struct ptlrpc_request *req, long amount)
1124 {
1125 struct lprocfs_stats *svc_stats;
1126 __u32 op = lustre_msg_get_opc(req->rq_reqmsg);
1127 int opc = opcode_offset(op);
1128
1129 svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1130 if (svc_stats == NULL || opc <= 0)
1131 return;
1132 LASSERT(opc < LUSTRE_MAX_OPCODES);
1133 if (!(op == LDLM_ENQUEUE || op == MDS_REINT))
1134 lprocfs_counter_add(svc_stats, opc + EXTRA_MAX_OPCODES, amount);
1135 }
1136
ptlrpc_lprocfs_brw(struct ptlrpc_request * req,int bytes)1137 void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes)
1138 {
1139 struct lprocfs_stats *svc_stats;
1140 int idx;
1141
1142 if (!req->rq_import)
1143 return;
1144 svc_stats = req->rq_import->imp_obd->obd_svc_stats;
1145 if (!svc_stats)
1146 return;
1147 idx = lustre_msg_get_opc(req->rq_reqmsg);
1148 switch (idx) {
1149 case OST_READ:
1150 idx = BRW_READ_BYTES + PTLRPC_LAST_CNTR;
1151 break;
1152 case OST_WRITE:
1153 idx = BRW_WRITE_BYTES + PTLRPC_LAST_CNTR;
1154 break;
1155 default:
1156 LASSERTF(0, "unsupported opcode %u\n", idx);
1157 break;
1158 }
1159
1160 lprocfs_counter_add(svc_stats, idx, bytes);
1161 }
1162
1163 EXPORT_SYMBOL(ptlrpc_lprocfs_brw);
1164
ptlrpc_lprocfs_unregister_service(struct ptlrpc_service * svc)1165 void ptlrpc_lprocfs_unregister_service(struct ptlrpc_service *svc)
1166 {
1167 if (svc->srv_procroot != NULL)
1168 lprocfs_remove(&svc->srv_procroot);
1169
1170 if (svc->srv_stats)
1171 lprocfs_free_stats(&svc->srv_stats);
1172 }
1173
ptlrpc_lprocfs_unregister_obd(struct obd_device * obd)1174 void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd)
1175 {
1176 if (obd->obd_svc_procroot)
1177 lprocfs_remove(&obd->obd_svc_procroot);
1178
1179 if (obd->obd_svc_stats)
1180 lprocfs_free_stats(&obd->obd_svc_stats);
1181 }
1182 EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);
1183
1184
1185 #define BUFLEN (UUID_MAX + 5)
1186
lprocfs_wr_evict_client(struct file * file,const char __user * buffer,size_t count,loff_t * off)1187 int lprocfs_wr_evict_client(struct file *file, const char __user *buffer,
1188 size_t count, loff_t *off)
1189 {
1190 struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1191 char *kbuf;
1192 char *tmpbuf;
1193
1194 OBD_ALLOC(kbuf, BUFLEN);
1195 if (kbuf == NULL)
1196 return -ENOMEM;
1197
1198 /*
1199 * OBD_ALLOC() will zero kbuf, but we only copy BUFLEN - 1
1200 * bytes into kbuf, to ensure that the string is NUL-terminated.
1201 * UUID_MAX should include a trailing NUL already.
1202 */
1203 if (copy_from_user(kbuf, buffer,
1204 min_t(unsigned long, BUFLEN - 1, count))) {
1205 count = -EFAULT;
1206 goto out;
1207 }
1208 tmpbuf = cfs_firststr(kbuf, min_t(unsigned long, BUFLEN - 1, count));
1209 /* Kludge code(deadlock situation): the lprocfs lock has been held
1210 * since the client is evicted by writing client's
1211 * uuid/nid to procfs "evict_client" entry. However,
1212 * obd_export_evict_by_uuid() will call lprocfs_remove() to destroy
1213 * the proc entries under the being destroyed export{}, so I have
1214 * to drop the lock at first here.
1215 * - jay, jxiong@clusterfs.com */
1216 class_incref(obd, __func__, current);
1217
1218 if (strncmp(tmpbuf, "nid:", 4) == 0)
1219 obd_export_evict_by_nid(obd, tmpbuf + 4);
1220 else if (strncmp(tmpbuf, "uuid:", 5) == 0)
1221 obd_export_evict_by_uuid(obd, tmpbuf + 5);
1222 else
1223 obd_export_evict_by_uuid(obd, tmpbuf);
1224
1225 class_decref(obd, __func__, current);
1226
1227 out:
1228 OBD_FREE(kbuf, BUFLEN);
1229 return count;
1230 }
1231 EXPORT_SYMBOL(lprocfs_wr_evict_client);
1232
1233 #undef BUFLEN
1234
lprocfs_wr_ping(struct file * file,const char __user * buffer,size_t count,loff_t * off)1235 int lprocfs_wr_ping(struct file *file, const char __user *buffer,
1236 size_t count, loff_t *off)
1237 {
1238 struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1239 struct ptlrpc_request *req;
1240 int rc;
1241
1242 LPROCFS_CLIMP_CHECK(obd);
1243 req = ptlrpc_prep_ping(obd->u.cli.cl_import);
1244 LPROCFS_CLIMP_EXIT(obd);
1245 if (req == NULL)
1246 return -ENOMEM;
1247
1248 req->rq_send_state = LUSTRE_IMP_FULL;
1249
1250 rc = ptlrpc_queue_wait(req);
1251
1252 ptlrpc_req_finished(req);
1253 if (rc >= 0)
1254 return count;
1255 return rc;
1256 }
1257 EXPORT_SYMBOL(lprocfs_wr_ping);
1258
1259 /* Write the connection UUID to this file to attempt to connect to that node.
1260 * The connection UUID is a node's primary NID. For example,
1261 * "echo connection=192.168.0.1@tcp0::instance > .../import".
1262 */
lprocfs_wr_import(struct file * file,const char __user * buffer,size_t count,loff_t * off)1263 int lprocfs_wr_import(struct file *file, const char __user *buffer,
1264 size_t count, loff_t *off)
1265 {
1266 struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1267 struct obd_import *imp = obd->u.cli.cl_import;
1268 char *kbuf = NULL;
1269 char *uuid;
1270 char *ptr;
1271 int do_reconn = 1;
1272 const char prefix[] = "connection=";
1273 const int prefix_len = sizeof(prefix) - 1;
1274
1275 if (count > PAGE_CACHE_SIZE - 1 || count <= prefix_len)
1276 return -EINVAL;
1277
1278 OBD_ALLOC(kbuf, count + 1);
1279 if (kbuf == NULL)
1280 return -ENOMEM;
1281
1282 if (copy_from_user(kbuf, buffer, count)) {
1283 count = -EFAULT;
1284 goto out;
1285 }
1286
1287 kbuf[count] = 0;
1288
1289 /* only support connection=uuid::instance now */
1290 if (strncmp(prefix, kbuf, prefix_len) != 0) {
1291 count = -EINVAL;
1292 goto out;
1293 }
1294
1295 uuid = kbuf + prefix_len;
1296 ptr = strstr(uuid, "::");
1297 if (ptr) {
1298 __u32 inst;
1299 char *endptr;
1300
1301 *ptr = 0;
1302 do_reconn = 0;
1303 ptr += strlen("::");
1304 inst = simple_strtol(ptr, &endptr, 10);
1305 if (*endptr) {
1306 CERROR("config: wrong instance # %s\n", ptr);
1307 } else if (inst != imp->imp_connect_data.ocd_instance) {
1308 CDEBUG(D_INFO, "IR: %s is connecting to an obsoleted target(%u/%u), reconnecting...\n",
1309 imp->imp_obd->obd_name,
1310 imp->imp_connect_data.ocd_instance, inst);
1311 do_reconn = 1;
1312 } else {
1313 CDEBUG(D_INFO, "IR: %s has already been connecting to new target(%u)\n",
1314 imp->imp_obd->obd_name, inst);
1315 }
1316 }
1317
1318 if (do_reconn)
1319 ptlrpc_recover_import(imp, uuid, 1);
1320
1321 out:
1322 OBD_FREE(kbuf, count + 1);
1323 return count;
1324 }
1325 EXPORT_SYMBOL(lprocfs_wr_import);
1326
lprocfs_rd_pinger_recov(struct seq_file * m,void * n)1327 int lprocfs_rd_pinger_recov(struct seq_file *m, void *n)
1328 {
1329 struct obd_device *obd = m->private;
1330 struct obd_import *imp = obd->u.cli.cl_import;
1331
1332 LPROCFS_CLIMP_CHECK(obd);
1333 seq_printf(m, "%d\n", !imp->imp_no_pinger_recover);
1334 LPROCFS_CLIMP_EXIT(obd);
1335
1336 return 0;
1337 }
1338 EXPORT_SYMBOL(lprocfs_rd_pinger_recov);
1339
lprocfs_wr_pinger_recov(struct file * file,const char __user * buffer,size_t count,loff_t * off)1340 int lprocfs_wr_pinger_recov(struct file *file, const char __user *buffer,
1341 size_t count, loff_t *off)
1342 {
1343 struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
1344 struct client_obd *cli = &obd->u.cli;
1345 struct obd_import *imp = cli->cl_import;
1346 int rc, val;
1347
1348 rc = lprocfs_write_helper(buffer, count, &val);
1349 if (rc < 0)
1350 return rc;
1351
1352 if (val != 0 && val != 1)
1353 return -ERANGE;
1354
1355 LPROCFS_CLIMP_CHECK(obd);
1356 spin_lock(&imp->imp_lock);
1357 imp->imp_no_pinger_recover = !val;
1358 spin_unlock(&imp->imp_lock);
1359 LPROCFS_CLIMP_EXIT(obd);
1360
1361 return count;
1362
1363 }
1364 EXPORT_SYMBOL(lprocfs_wr_pinger_recov);
1365
1366 #endif /* CONFIG_PROC_FS */
1367