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 * lustre/obdclass/lprocfs_status.c
37 *
38 * Author: Hariharan Thantry <thantry@users.sourceforge.net>
39 */
40
41 #define DEBUG_SUBSYSTEM S_CLASS
42
43 #include "../include/obd_class.h"
44 #include "../include/lprocfs_status.h"
45 #include "../include/lustre/lustre_idl.h"
46 #include <linux/seq_file.h>
47 #include <linux/ctype.h>
48
49 static const char * const obd_connect_names[] = {
50 "read_only",
51 "lov_index",
52 "unused",
53 "write_grant",
54 "server_lock",
55 "version",
56 "request_portal",
57 "acl",
58 "xattr",
59 "create_on_write",
60 "truncate_lock",
61 "initial_transno",
62 "inode_bit_locks",
63 "join_file(obsolete)",
64 "getattr_by_fid",
65 "no_oh_for_devices",
66 "remote_client",
67 "remote_client_by_force",
68 "max_byte_per_rpc",
69 "64bit_qdata",
70 "mds_capability",
71 "oss_capability",
72 "early_lock_cancel",
73 "som",
74 "adaptive_timeouts",
75 "lru_resize",
76 "mds_mds_connection",
77 "real_conn",
78 "change_qunit_size",
79 "alt_checksum_algorithm",
80 "fid_is_enabled",
81 "version_recovery",
82 "pools",
83 "grant_shrink",
84 "skip_orphan",
85 "large_ea",
86 "full20",
87 "layout_lock",
88 "64bithash",
89 "object_max_bytes",
90 "imp_recov",
91 "jobstats",
92 "umask",
93 "einprogress",
94 "grant_param",
95 "flock_owner",
96 "lvb_type",
97 "nanoseconds_times",
98 "lightweight_conn",
99 "short_io",
100 "pingless",
101 "flock_deadlock",
102 "disp_stripe",
103 "unknown",
104 NULL
105 };
106
obd_connect_flags2str(char * page,int count,__u64 flags,char * sep)107 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
108 {
109 __u64 mask = 1;
110 int i, ret = 0;
111
112 for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
113 if (flags & mask)
114 ret += snprintf(page + ret, count - ret, "%s%s",
115 ret ? sep : "", obd_connect_names[i]);
116 }
117 if (flags & ~(mask - 1))
118 ret += snprintf(page + ret, count - ret,
119 "%sunknown flags %#llx",
120 ret ? sep : "", flags & ~(mask - 1));
121 return ret;
122 }
123 EXPORT_SYMBOL(obd_connect_flags2str);
124
lprocfs_read_frac_helper(char * buffer,unsigned long count,long val,int mult)125 int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
126 int mult)
127 {
128 long decimal_val, frac_val;
129 int prtn;
130
131 if (count < 10)
132 return -EINVAL;
133
134 decimal_val = val / mult;
135 prtn = snprintf(buffer, count, "%ld", decimal_val);
136 frac_val = val % mult;
137
138 if (prtn < (count - 4) && frac_val > 0) {
139 long temp_frac;
140 int i, temp_mult = 1, frac_bits = 0;
141
142 temp_frac = frac_val * 10;
143 buffer[prtn++] = '.';
144 while (frac_bits < 2 && (temp_frac / mult) < 1) {
145 /* only reserved 2 bits fraction */
146 buffer[prtn++] = '0';
147 temp_frac *= 10;
148 frac_bits++;
149 }
150 /*
151 * Need to think these cases :
152 * 1. #echo x.00 > /proc/xxx output result : x
153 * 2. #echo x.0x > /proc/xxx output result : x.0x
154 * 3. #echo x.x0 > /proc/xxx output result : x.x
155 * 4. #echo x.xx > /proc/xxx output result : x.xx
156 * Only reserved 2 bits fraction.
157 */
158 for (i = 0; i < (5 - prtn); i++)
159 temp_mult *= 10;
160
161 frac_bits = min((int)count - prtn, 3 - frac_bits);
162 prtn += snprintf(buffer + prtn, frac_bits, "%ld",
163 frac_val * temp_mult / mult);
164
165 prtn--;
166 while (buffer[prtn] < '1' || buffer[prtn] > '9') {
167 prtn--;
168 if (buffer[prtn] == '.') {
169 prtn--;
170 break;
171 }
172 }
173 prtn++;
174 }
175 buffer[prtn++] = '\n';
176 return prtn;
177 }
178 EXPORT_SYMBOL(lprocfs_read_frac_helper);
179
lprocfs_write_frac_helper(const char __user * buffer,unsigned long count,int * val,int mult)180 int lprocfs_write_frac_helper(const char __user *buffer, unsigned long count,
181 int *val, int mult)
182 {
183 char kernbuf[20], *end, *pbuf;
184
185 if (count > (sizeof(kernbuf) - 1))
186 return -EINVAL;
187
188 if (copy_from_user(kernbuf, buffer, count))
189 return -EFAULT;
190
191 kernbuf[count] = '\0';
192 pbuf = kernbuf;
193 if (*pbuf == '-') {
194 mult = -mult;
195 pbuf++;
196 }
197
198 *val = (int)simple_strtoul(pbuf, &end, 10) * mult;
199 if (pbuf == end)
200 return -EINVAL;
201
202 if (end != NULL && *end == '.') {
203 int temp_val, pow = 1;
204 int i;
205
206 pbuf = end + 1;
207 if (strlen(pbuf) > 5)
208 pbuf[5] = '\0'; /*only allow 5bits fractional*/
209
210 temp_val = (int)simple_strtoul(pbuf, &end, 10) * mult;
211
212 if (pbuf < end) {
213 for (i = 0; i < (end - pbuf); i++)
214 pow *= 10;
215
216 *val += temp_val / pow;
217 }
218 }
219 return 0;
220 }
221 EXPORT_SYMBOL(lprocfs_write_frac_helper);
222
223 static int lprocfs_no_percpu_stats;
224 module_param(lprocfs_no_percpu_stats, int, 0644);
225 MODULE_PARM_DESC(lprocfs_no_percpu_stats, "Do not alloc percpu data for lprocfs stats");
226
227 #define MAX_STRING_SIZE 128
228
lprocfs_single_release(struct inode * inode,struct file * file)229 int lprocfs_single_release(struct inode *inode, struct file *file)
230 {
231 return single_release(inode, file);
232 }
233 EXPORT_SYMBOL(lprocfs_single_release);
234
lprocfs_seq_release(struct inode * inode,struct file * file)235 int lprocfs_seq_release(struct inode *inode, struct file *file)
236 {
237 return seq_release(inode, file);
238 }
239 EXPORT_SYMBOL(lprocfs_seq_release);
240
241 /* lprocfs API calls */
242
ldebugfs_add_simple(struct dentry * root,char * name,void * data,struct file_operations * fops)243 struct dentry *ldebugfs_add_simple(struct dentry *root,
244 char *name, void *data,
245 struct file_operations *fops)
246 {
247 struct dentry *entry;
248 umode_t mode = 0;
249
250 if (root == NULL || name == NULL || fops == NULL)
251 return ERR_PTR(-EINVAL);
252
253 if (fops->read)
254 mode = 0444;
255 if (fops->write)
256 mode |= 0200;
257 entry = debugfs_create_file(name, mode, root, data, fops);
258 if (IS_ERR_OR_NULL(entry)) {
259 CERROR("LprocFS: No memory to create <debugfs> entry %s", name);
260 return entry ?: ERR_PTR(-ENOMEM);
261 }
262 return entry;
263 }
264 EXPORT_SYMBOL(ldebugfs_add_simple);
265
266 static struct file_operations lprocfs_generic_fops = { };
267
ldebugfs_add_vars(struct dentry * parent,struct lprocfs_vars * list,void * data)268 int ldebugfs_add_vars(struct dentry *parent,
269 struct lprocfs_vars *list,
270 void *data)
271 {
272 if (IS_ERR_OR_NULL(parent) || IS_ERR_OR_NULL(list))
273 return -EINVAL;
274
275 while (list->name != NULL) {
276 struct dentry *entry;
277 umode_t mode = 0;
278
279 if (list->proc_mode != 0000) {
280 mode = list->proc_mode;
281 } else if (list->fops) {
282 if (list->fops->read)
283 mode = 0444;
284 if (list->fops->write)
285 mode |= 0200;
286 }
287 entry = debugfs_create_file(list->name, mode, parent,
288 list->data ?: data,
289 list->fops ?: &lprocfs_generic_fops
290 );
291 if (IS_ERR_OR_NULL(entry))
292 return entry ? PTR_ERR(entry) : -ENOMEM;
293 list++;
294 }
295 return 0;
296 }
297 EXPORT_SYMBOL(ldebugfs_add_vars);
298
ldebugfs_remove(struct dentry ** entryp)299 void ldebugfs_remove(struct dentry **entryp)
300 {
301 debugfs_remove_recursive(*entryp);
302 *entryp = NULL;
303 }
304 EXPORT_SYMBOL(ldebugfs_remove);
305
ldebugfs_register(const char * name,struct dentry * parent,struct lprocfs_vars * list,void * data)306 struct dentry *ldebugfs_register(const char *name,
307 struct dentry *parent,
308 struct lprocfs_vars *list, void *data)
309 {
310 struct dentry *entry;
311
312 entry = debugfs_create_dir(name, parent);
313 if (IS_ERR_OR_NULL(entry)) {
314 entry = entry ?: ERR_PTR(-ENOMEM);
315 goto out;
316 }
317
318 if (!IS_ERR_OR_NULL(list)) {
319 int rc;
320
321 rc = ldebugfs_add_vars(entry, list, data);
322 if (rc != 0) {
323 debugfs_remove(entry);
324 entry = ERR_PTR(rc);
325 }
326 }
327 out:
328 return entry;
329 }
330 EXPORT_SYMBOL(ldebugfs_register);
331
332 /* Generic callbacks */
lprocfs_rd_uint(struct seq_file * m,void * data)333 int lprocfs_rd_uint(struct seq_file *m, void *data)
334 {
335 seq_printf(m, "%u\n", *(unsigned int *)data);
336 return 0;
337 }
338 EXPORT_SYMBOL(lprocfs_rd_uint);
339
lprocfs_wr_uint(struct file * file,const char __user * buffer,unsigned long count,void * data)340 int lprocfs_wr_uint(struct file *file, const char __user *buffer,
341 unsigned long count, void *data)
342 {
343 unsigned *p = data;
344 char dummy[MAX_STRING_SIZE + 1], *end;
345 unsigned long tmp;
346
347 dummy[MAX_STRING_SIZE] = '\0';
348 if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
349 return -EFAULT;
350
351 tmp = simple_strtoul(dummy, &end, 0);
352 if (dummy == end)
353 return -EINVAL;
354
355 *p = (unsigned int)tmp;
356 return count;
357 }
358 EXPORT_SYMBOL(lprocfs_wr_uint);
359
uuid_show(struct kobject * kobj,struct attribute * attr,char * buf)360 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
361 char *buf)
362 {
363 struct obd_device *obd = container_of(kobj, struct obd_device,
364 obd_kobj);
365
366 return sprintf(buf, "%s\n", obd->obd_uuid.uuid);
367 }
368 LUSTRE_RO_ATTR(uuid);
369
blocksize_show(struct kobject * kobj,struct attribute * attr,char * buf)370 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
371 char *buf)
372 {
373 struct obd_device *obd = container_of(kobj, struct obd_device,
374 obd_kobj);
375 struct obd_statfs osfs;
376 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
377 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
378 OBD_STATFS_NODELAY);
379 if (!rc)
380 return sprintf(buf, "%u\n", osfs.os_bsize);
381
382 return rc;
383 }
384 LUSTRE_RO_ATTR(blocksize);
385
kbytestotal_show(struct kobject * kobj,struct attribute * attr,char * buf)386 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
387 char *buf)
388 {
389 struct obd_device *obd = container_of(kobj, struct obd_device,
390 obd_kobj);
391 struct obd_statfs osfs;
392 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
393 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
394 OBD_STATFS_NODELAY);
395 if (!rc) {
396 __u32 blk_size = osfs.os_bsize >> 10;
397 __u64 result = osfs.os_blocks;
398
399 while (blk_size >>= 1)
400 result <<= 1;
401
402 return sprintf(buf, "%llu\n", result);
403 }
404
405 return rc;
406 }
407 LUSTRE_RO_ATTR(kbytestotal);
408
kbytesfree_show(struct kobject * kobj,struct attribute * attr,char * buf)409 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
410 char *buf)
411 {
412 struct obd_device *obd = container_of(kobj, struct obd_device,
413 obd_kobj);
414 struct obd_statfs osfs;
415 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
416 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
417 OBD_STATFS_NODELAY);
418 if (!rc) {
419 __u32 blk_size = osfs.os_bsize >> 10;
420 __u64 result = osfs.os_bfree;
421
422 while (blk_size >>= 1)
423 result <<= 1;
424
425 return sprintf(buf, "%llu\n", result);
426 }
427
428 return rc;
429 }
430 LUSTRE_RO_ATTR(kbytesfree);
431
kbytesavail_show(struct kobject * kobj,struct attribute * attr,char * buf)432 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
433 char *buf)
434 {
435 struct obd_device *obd = container_of(kobj, struct obd_device,
436 obd_kobj);
437 struct obd_statfs osfs;
438 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
439 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
440 OBD_STATFS_NODELAY);
441 if (!rc) {
442 __u32 blk_size = osfs.os_bsize >> 10;
443 __u64 result = osfs.os_bavail;
444
445 while (blk_size >>= 1)
446 result <<= 1;
447
448 return sprintf(buf, "%llu\n", result);
449 }
450
451 return rc;
452 }
453 LUSTRE_RO_ATTR(kbytesavail);
454
filestotal_show(struct kobject * kobj,struct attribute * attr,char * buf)455 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
456 char *buf)
457 {
458 struct obd_device *obd = container_of(kobj, struct obd_device,
459 obd_kobj);
460 struct obd_statfs osfs;
461 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
462 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
463 OBD_STATFS_NODELAY);
464 if (!rc)
465 return sprintf(buf, "%llu\n", osfs.os_files);
466
467 return rc;
468 }
469 LUSTRE_RO_ATTR(filestotal);
470
filesfree_show(struct kobject * kobj,struct attribute * attr,char * buf)471 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
472 char *buf)
473 {
474 struct obd_device *obd = container_of(kobj, struct obd_device,
475 obd_kobj);
476 struct obd_statfs osfs;
477 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
478 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
479 OBD_STATFS_NODELAY);
480 if (!rc)
481 return sprintf(buf, "%llu\n", osfs.os_ffree);
482
483 return rc;
484 }
485 LUSTRE_RO_ATTR(filesfree);
486
lprocfs_rd_server_uuid(struct seq_file * m,void * data)487 int lprocfs_rd_server_uuid(struct seq_file *m, void *data)
488 {
489 struct obd_device *obd = data;
490 struct obd_import *imp;
491 char *imp_state_name = NULL;
492 int rc;
493
494 LASSERT(obd != NULL);
495 rc = lprocfs_climp_check(obd);
496 if (rc)
497 return rc;
498
499 imp = obd->u.cli.cl_import;
500 imp_state_name = ptlrpc_import_state_name(imp->imp_state);
501 seq_printf(m, "%s\t%s%s\n",
502 obd2cli_tgt(obd), imp_state_name,
503 imp->imp_deactive ? "\tDEACTIVATED" : "");
504
505 LPROCFS_CLIMP_EXIT(obd);
506
507 return 0;
508 }
509 EXPORT_SYMBOL(lprocfs_rd_server_uuid);
510
lprocfs_rd_conn_uuid(struct seq_file * m,void * data)511 int lprocfs_rd_conn_uuid(struct seq_file *m, void *data)
512 {
513 struct obd_device *obd = data;
514 struct ptlrpc_connection *conn;
515 int rc;
516
517 LASSERT(obd != NULL);
518
519 rc = lprocfs_climp_check(obd);
520 if (rc)
521 return rc;
522
523 conn = obd->u.cli.cl_import->imp_connection;
524 if (conn && obd->u.cli.cl_import)
525 seq_printf(m, "%s\n", conn->c_remote_uuid.uuid);
526 else
527 seq_puts(m, "<none>\n");
528
529 LPROCFS_CLIMP_EXIT(obd);
530
531 return 0;
532 }
533 EXPORT_SYMBOL(lprocfs_rd_conn_uuid);
534
535 /** add up per-cpu counters */
lprocfs_stats_collect(struct lprocfs_stats * stats,int idx,struct lprocfs_counter * cnt)536 void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
537 struct lprocfs_counter *cnt)
538 {
539 unsigned int num_entry;
540 struct lprocfs_counter *percpu_cntr;
541 int i;
542 unsigned long flags = 0;
543
544 memset(cnt, 0, sizeof(*cnt));
545
546 if (stats == NULL) {
547 /* set count to 1 to avoid divide-by-zero errs in callers */
548 cnt->lc_count = 1;
549 return;
550 }
551
552 cnt->lc_min = LC_MIN_INIT;
553
554 num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
555
556 for (i = 0; i < num_entry; i++) {
557 if (stats->ls_percpu[i] == NULL)
558 continue;
559 percpu_cntr = lprocfs_stats_counter_get(stats, i, idx);
560
561 cnt->lc_count += percpu_cntr->lc_count;
562 cnt->lc_sum += percpu_cntr->lc_sum;
563 if (percpu_cntr->lc_min < cnt->lc_min)
564 cnt->lc_min = percpu_cntr->lc_min;
565 if (percpu_cntr->lc_max > cnt->lc_max)
566 cnt->lc_max = percpu_cntr->lc_max;
567 cnt->lc_sumsquare += percpu_cntr->lc_sumsquare;
568 }
569
570 lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
571 }
572 EXPORT_SYMBOL(lprocfs_stats_collect);
573
574 /**
575 * Append a space separated list of current set flags to str.
576 */
577 #define flag2str(flag, first) \
578 do { \
579 if (imp->imp_##flag) \
580 seq_printf(m, "%s" #flag, first ? "" : ", "); \
581 } while (0)
obd_import_flags2str(struct obd_import * imp,struct seq_file * m)582 static int obd_import_flags2str(struct obd_import *imp, struct seq_file *m)
583 {
584 bool first = true;
585
586 if (imp->imp_obd->obd_no_recov) {
587 seq_printf(m, "no_recov");
588 first = false;
589 }
590
591 flag2str(invalid, first);
592 first = false;
593 flag2str(deactive, first);
594 flag2str(replayable, first);
595 flag2str(pingable, first);
596 return 0;
597 }
598
599 #undef flags2str
600
obd_connect_seq_flags2str(struct seq_file * m,__u64 flags,char * sep)601 static void obd_connect_seq_flags2str(struct seq_file *m, __u64 flags, char *sep)
602 {
603 __u64 mask = 1;
604 int i;
605 bool first = true;
606
607 for (i = 0; obd_connect_names[i] != NULL; i++, mask <<= 1) {
608 if (flags & mask) {
609 seq_printf(m, "%s%s",
610 first ? sep : "", obd_connect_names[i]);
611 first = false;
612 }
613 }
614 if (flags & ~(mask - 1))
615 seq_printf(m, "%sunknown flags %#llx",
616 first ? sep : "", flags & ~(mask - 1));
617 }
618
lprocfs_rd_import(struct seq_file * m,void * data)619 int lprocfs_rd_import(struct seq_file *m, void *data)
620 {
621 char nidstr[LNET_NIDSTR_SIZE];
622 struct lprocfs_counter ret;
623 struct lprocfs_counter_header *header;
624 struct obd_device *obd = data;
625 struct obd_import *imp;
626 struct obd_import_conn *conn;
627 int j;
628 int k;
629 int rw = 0;
630 int rc;
631
632 LASSERT(obd != NULL);
633 rc = lprocfs_climp_check(obd);
634 if (rc)
635 return rc;
636
637 imp = obd->u.cli.cl_import;
638
639 seq_printf(m,
640 "import:\n"
641 " name: %s\n"
642 " target: %s\n"
643 " state: %s\n"
644 " instance: %u\n"
645 " connect_flags: [",
646 obd->obd_name,
647 obd2cli_tgt(obd),
648 ptlrpc_import_state_name(imp->imp_state),
649 imp->imp_connect_data.ocd_instance);
650 obd_connect_seq_flags2str(m, imp->imp_connect_data.ocd_connect_flags, ", ");
651 seq_printf(m,
652 "]\n"
653 " import_flags: [");
654 obd_import_flags2str(imp, m);
655
656 seq_printf(m,
657 "]\n"
658 " connection:\n"
659 " failover_nids: [");
660 spin_lock(&imp->imp_lock);
661 j = 0;
662 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
663 libcfs_nid2str_r(conn->oic_conn->c_peer.nid,
664 nidstr, sizeof(nidstr));
665 seq_printf(m, "%s%s", j ? ", " : "", nidstr);
666 j++;
667 }
668 libcfs_nid2str_r(imp->imp_connection->c_peer.nid,
669 nidstr, sizeof(nidstr));
670 seq_printf(m,
671 "]\n"
672 " current_connection: %s\n"
673 " connection_attempts: %u\n"
674 " generation: %u\n"
675 " in-progress_invalidations: %u\n",
676 imp->imp_connection == NULL ? "<none>" : nidstr,
677 imp->imp_conn_cnt,
678 imp->imp_generation,
679 atomic_read(&imp->imp_inval_count));
680 spin_unlock(&imp->imp_lock);
681
682 if (obd->obd_svc_stats == NULL)
683 goto out_climp;
684
685 header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
686 lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
687 if (ret.lc_count != 0) {
688 /* first argument to do_div MUST be __u64 */
689 __u64 sum = ret.lc_sum;
690
691 do_div(sum, ret.lc_count);
692 ret.lc_sum = sum;
693 } else
694 ret.lc_sum = 0;
695 seq_printf(m,
696 " rpcs:\n"
697 " inflight: %u\n"
698 " unregistering: %u\n"
699 " timeouts: %u\n"
700 " avg_waittime: %llu %s\n",
701 atomic_read(&imp->imp_inflight),
702 atomic_read(&imp->imp_unregistering),
703 atomic_read(&imp->imp_timeouts),
704 ret.lc_sum, header->lc_units);
705
706 k = 0;
707 for (j = 0; j < IMP_AT_MAX_PORTALS; j++) {
708 if (imp->imp_at.iat_portal[j] == 0)
709 break;
710 k = max_t(unsigned int, k,
711 at_get(&imp->imp_at.iat_service_estimate[j]));
712 }
713 seq_printf(m,
714 " service_estimates:\n"
715 " services: %u sec\n"
716 " network: %u sec\n",
717 k,
718 at_get(&imp->imp_at.iat_net_latency));
719
720 seq_printf(m,
721 " transactions:\n"
722 " last_replay: %llu\n"
723 " peer_committed: %llu\n"
724 " last_checked: %llu\n",
725 imp->imp_last_replay_transno,
726 imp->imp_peer_committed_transno,
727 imp->imp_last_transno_checked);
728
729 /* avg data rates */
730 for (rw = 0; rw <= 1; rw++) {
731 lprocfs_stats_collect(obd->obd_svc_stats,
732 PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
733 &ret);
734 if (ret.lc_sum > 0 && ret.lc_count > 0) {
735 /* first argument to do_div MUST be __u64 */
736 __u64 sum = ret.lc_sum;
737
738 do_div(sum, ret.lc_count);
739 ret.lc_sum = sum;
740 seq_printf(m,
741 " %s_data_averages:\n"
742 " bytes_per_rpc: %llu\n",
743 rw ? "write" : "read",
744 ret.lc_sum);
745 }
746 k = (int)ret.lc_sum;
747 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
748 header = &obd->obd_svc_stats->ls_cnt_header[j];
749 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
750 if (ret.lc_sum > 0 && ret.lc_count != 0) {
751 /* first argument to do_div MUST be __u64 */
752 __u64 sum = ret.lc_sum;
753
754 do_div(sum, ret.lc_count);
755 ret.lc_sum = sum;
756 seq_printf(m,
757 " %s_per_rpc: %llu\n",
758 header->lc_units, ret.lc_sum);
759 j = (int)ret.lc_sum;
760 if (j > 0)
761 seq_printf(m,
762 " MB_per_sec: %u.%.02u\n",
763 k / j, (100 * k / j) % 100);
764 }
765 }
766
767 out_climp:
768 LPROCFS_CLIMP_EXIT(obd);
769 return 0;
770 }
771 EXPORT_SYMBOL(lprocfs_rd_import);
772
lprocfs_rd_state(struct seq_file * m,void * data)773 int lprocfs_rd_state(struct seq_file *m, void *data)
774 {
775 struct obd_device *obd = data;
776 struct obd_import *imp;
777 int j, k, rc;
778
779 LASSERT(obd != NULL);
780 rc = lprocfs_climp_check(obd);
781 if (rc)
782 return rc;
783
784 imp = obd->u.cli.cl_import;
785
786 seq_printf(m, "current_state: %s\n",
787 ptlrpc_import_state_name(imp->imp_state));
788 seq_printf(m, "state_history:\n");
789 k = imp->imp_state_hist_idx;
790 for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
791 struct import_state_hist *ish =
792 &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
793 if (ish->ish_state == 0)
794 continue;
795 seq_printf(m, " - [%lld, %s]\n", (s64)ish->ish_time,
796 ptlrpc_import_state_name(ish->ish_state));
797 }
798
799 LPROCFS_CLIMP_EXIT(obd);
800 return 0;
801 }
802 EXPORT_SYMBOL(lprocfs_rd_state);
803
lprocfs_at_hist_helper(struct seq_file * m,struct adaptive_timeout * at)804 int lprocfs_at_hist_helper(struct seq_file *m, struct adaptive_timeout *at)
805 {
806 int i;
807
808 for (i = 0; i < AT_BINS; i++)
809 seq_printf(m, "%3u ", at->at_hist[i]);
810 seq_printf(m, "\n");
811 return 0;
812 }
813 EXPORT_SYMBOL(lprocfs_at_hist_helper);
814
815 /* See also ptlrpc_lprocfs_rd_timeouts */
lprocfs_rd_timeouts(struct seq_file * m,void * data)816 int lprocfs_rd_timeouts(struct seq_file *m, void *data)
817 {
818 struct obd_device *obd = data;
819 struct obd_import *imp;
820 unsigned int cur, worst;
821 time64_t now, worstt;
822 struct dhms ts;
823 int i, rc;
824
825 LASSERT(obd != NULL);
826 rc = lprocfs_climp_check(obd);
827 if (rc)
828 return rc;
829
830 imp = obd->u.cli.cl_import;
831
832 now = ktime_get_real_seconds();
833
834 /* Some network health info for kicks */
835 s2dhms(&ts, now - imp->imp_last_reply_time);
836 seq_printf(m, "%-10s : %lld, " DHMS_FMT " ago\n",
837 "last reply", (s64)imp->imp_last_reply_time, DHMS_VARS(&ts));
838
839 cur = at_get(&imp->imp_at.iat_net_latency);
840 worst = imp->imp_at.iat_net_latency.at_worst_ever;
841 worstt = imp->imp_at.iat_net_latency.at_worst_time;
842 s2dhms(&ts, now - worstt);
843 seq_printf(m, "%-10s : cur %3u worst %3u (at %lld, " DHMS_FMT " ago) ",
844 "network", cur, worst, (s64)worstt, DHMS_VARS(&ts));
845 lprocfs_at_hist_helper(m, &imp->imp_at.iat_net_latency);
846
847 for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
848 if (imp->imp_at.iat_portal[i] == 0)
849 break;
850 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
851 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
852 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
853 s2dhms(&ts, now - worstt);
854 seq_printf(m, "portal %-2d : cur %3u worst %3u (at %lld, "
855 DHMS_FMT " ago) ", imp->imp_at.iat_portal[i],
856 cur, worst, (s64)worstt, DHMS_VARS(&ts));
857 lprocfs_at_hist_helper(m, &imp->imp_at.iat_service_estimate[i]);
858 }
859
860 LPROCFS_CLIMP_EXIT(obd);
861 return 0;
862 }
863 EXPORT_SYMBOL(lprocfs_rd_timeouts);
864
lprocfs_rd_connect_flags(struct seq_file * m,void * data)865 int lprocfs_rd_connect_flags(struct seq_file *m, void *data)
866 {
867 struct obd_device *obd = data;
868 __u64 flags;
869 int rc;
870
871 rc = lprocfs_climp_check(obd);
872 if (rc)
873 return rc;
874
875 flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
876 seq_printf(m, "flags=%#llx\n", flags);
877 obd_connect_seq_flags2str(m, flags, "\n");
878 seq_printf(m, "\n");
879 LPROCFS_CLIMP_EXIT(obd);
880 return 0;
881 }
882 EXPORT_SYMBOL(lprocfs_rd_connect_flags);
883
884 static struct attribute *obd_def_attrs[] = {
885 &lustre_attr_blocksize.attr,
886 &lustre_attr_kbytestotal.attr,
887 &lustre_attr_kbytesfree.attr,
888 &lustre_attr_kbytesavail.attr,
889 &lustre_attr_filestotal.attr,
890 &lustre_attr_filesfree.attr,
891 &lustre_attr_uuid.attr,
892 NULL,
893 };
894
obd_sysfs_release(struct kobject * kobj)895 static void obd_sysfs_release(struct kobject *kobj)
896 {
897 struct obd_device *obd = container_of(kobj, struct obd_device,
898 obd_kobj);
899
900 complete(&obd->obd_kobj_unregister);
901 }
902
903 static struct kobj_type obd_ktype = {
904 .default_attrs = obd_def_attrs,
905 .sysfs_ops = &lustre_sysfs_ops,
906 .release = obd_sysfs_release,
907 };
908
lprocfs_obd_setup(struct obd_device * obd,struct lprocfs_vars * list,struct attribute_group * attrs)909 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list,
910 struct attribute_group *attrs)
911 {
912 int rc = 0;
913
914 init_completion(&obd->obd_kobj_unregister);
915 rc = kobject_init_and_add(&obd->obd_kobj, &obd_ktype,
916 obd->obd_type->typ_kobj,
917 "%s", obd->obd_name);
918 if (rc)
919 return rc;
920
921 if (attrs) {
922 rc = sysfs_create_group(&obd->obd_kobj, attrs);
923 if (rc) {
924 kobject_put(&obd->obd_kobj);
925 return rc;
926 }
927 }
928
929 obd->obd_debugfs_entry = ldebugfs_register(obd->obd_name,
930 obd->obd_type->typ_debugfs_entry,
931 list, obd);
932 if (IS_ERR_OR_NULL(obd->obd_debugfs_entry)) {
933 rc = obd->obd_debugfs_entry ? PTR_ERR(obd->obd_debugfs_entry)
934 : -ENOMEM;
935 CERROR("error %d setting up lprocfs for %s\n",
936 rc, obd->obd_name);
937 obd->obd_debugfs_entry = NULL;
938 }
939
940 return rc;
941 }
942 EXPORT_SYMBOL(lprocfs_obd_setup);
943
lprocfs_obd_cleanup(struct obd_device * obd)944 int lprocfs_obd_cleanup(struct obd_device *obd)
945 {
946 if (!obd)
947 return -EINVAL;
948
949 if (!IS_ERR_OR_NULL(obd->obd_debugfs_entry))
950 ldebugfs_remove(&obd->obd_debugfs_entry);
951
952 kobject_put(&obd->obd_kobj);
953 wait_for_completion(&obd->obd_kobj_unregister);
954
955 return 0;
956 }
957 EXPORT_SYMBOL(lprocfs_obd_cleanup);
958
lprocfs_stats_alloc_one(struct lprocfs_stats * stats,unsigned int cpuid)959 int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
960 {
961 struct lprocfs_counter *cntr;
962 unsigned int percpusize;
963 int rc = -ENOMEM;
964 unsigned long flags = 0;
965 int i;
966
967 LASSERT(stats->ls_percpu[cpuid] == NULL);
968 LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
969
970 percpusize = lprocfs_stats_counter_size(stats);
971 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
972 if (stats->ls_percpu[cpuid] != NULL) {
973 rc = 0;
974 if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
975 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
976 spin_lock_irqsave(&stats->ls_lock, flags);
977 else
978 spin_lock(&stats->ls_lock);
979 if (stats->ls_biggest_alloc_num <= cpuid)
980 stats->ls_biggest_alloc_num = cpuid + 1;
981 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
982 spin_unlock_irqrestore(&stats->ls_lock, flags);
983 else
984 spin_unlock(&stats->ls_lock);
985 }
986 /* initialize the ls_percpu[cpuid] non-zero counter */
987 for (i = 0; i < stats->ls_num; ++i) {
988 cntr = lprocfs_stats_counter_get(stats, cpuid, i);
989 cntr->lc_min = LC_MIN_INIT;
990 }
991 }
992 return rc;
993 }
994 EXPORT_SYMBOL(lprocfs_stats_alloc_one);
995
lprocfs_alloc_stats(unsigned int num,enum lprocfs_stats_flags flags)996 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
997 enum lprocfs_stats_flags flags)
998 {
999 struct lprocfs_stats *stats;
1000 unsigned int num_entry;
1001 unsigned int percpusize = 0;
1002 int i;
1003
1004 if (num == 0)
1005 return NULL;
1006
1007 if (lprocfs_no_percpu_stats != 0)
1008 flags |= LPROCFS_STATS_FLAG_NOPERCPU;
1009
1010 if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
1011 num_entry = 1;
1012 else
1013 num_entry = num_possible_cpus();
1014
1015 /* alloc percpu pointers for all possible cpu slots */
1016 LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1017 if (stats == NULL)
1018 return NULL;
1019
1020 stats->ls_num = num;
1021 stats->ls_flags = flags;
1022 spin_lock_init(&stats->ls_lock);
1023
1024 /* alloc num of counter headers */
1025 LIBCFS_ALLOC(stats->ls_cnt_header,
1026 stats->ls_num * sizeof(struct lprocfs_counter_header));
1027 if (stats->ls_cnt_header == NULL)
1028 goto fail;
1029
1030 if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
1031 /* contains only one set counters */
1032 percpusize = lprocfs_stats_counter_size(stats);
1033 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
1034 if (stats->ls_percpu[0] == NULL)
1035 goto fail;
1036 stats->ls_biggest_alloc_num = 1;
1037 } else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
1038 /* alloc all percpu data */
1039 for (i = 0; i < num_entry; ++i)
1040 if (lprocfs_stats_alloc_one(stats, i) < 0)
1041 goto fail;
1042 }
1043
1044 return stats;
1045
1046 fail:
1047 lprocfs_free_stats(&stats);
1048 return NULL;
1049 }
1050 EXPORT_SYMBOL(lprocfs_alloc_stats);
1051
lprocfs_free_stats(struct lprocfs_stats ** statsh)1052 void lprocfs_free_stats(struct lprocfs_stats **statsh)
1053 {
1054 struct lprocfs_stats *stats = *statsh;
1055 unsigned int num_entry;
1056 unsigned int percpusize;
1057 unsigned int i;
1058
1059 if (stats == NULL || stats->ls_num == 0)
1060 return;
1061 *statsh = NULL;
1062
1063 if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
1064 num_entry = 1;
1065 else
1066 num_entry = num_possible_cpus();
1067
1068 percpusize = lprocfs_stats_counter_size(stats);
1069 for (i = 0; i < num_entry; i++)
1070 if (stats->ls_percpu[i] != NULL)
1071 LIBCFS_FREE(stats->ls_percpu[i], percpusize);
1072 if (stats->ls_cnt_header != NULL)
1073 LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
1074 sizeof(struct lprocfs_counter_header));
1075 LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1076 }
1077 EXPORT_SYMBOL(lprocfs_free_stats);
1078
lprocfs_clear_stats(struct lprocfs_stats * stats)1079 void lprocfs_clear_stats(struct lprocfs_stats *stats)
1080 {
1081 struct lprocfs_counter *percpu_cntr;
1082 int i;
1083 int j;
1084 unsigned int num_entry;
1085 unsigned long flags = 0;
1086
1087 num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1088
1089 for (i = 0; i < num_entry; i++) {
1090 if (stats->ls_percpu[i] == NULL)
1091 continue;
1092 for (j = 0; j < stats->ls_num; j++) {
1093 percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
1094 percpu_cntr->lc_count = 0;
1095 percpu_cntr->lc_min = LC_MIN_INIT;
1096 percpu_cntr->lc_max = 0;
1097 percpu_cntr->lc_sumsquare = 0;
1098 percpu_cntr->lc_sum = 0;
1099 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1100 percpu_cntr->lc_sum_irq = 0;
1101 }
1102 }
1103
1104 lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1105 }
1106 EXPORT_SYMBOL(lprocfs_clear_stats);
1107
lprocfs_stats_seq_write(struct file * file,const char __user * buf,size_t len,loff_t * off)1108 static ssize_t lprocfs_stats_seq_write(struct file *file,
1109 const char __user *buf,
1110 size_t len, loff_t *off)
1111 {
1112 struct seq_file *seq = file->private_data;
1113 struct lprocfs_stats *stats = seq->private;
1114
1115 lprocfs_clear_stats(stats);
1116
1117 return len;
1118 }
1119
lprocfs_stats_seq_start(struct seq_file * p,loff_t * pos)1120 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
1121 {
1122 struct lprocfs_stats *stats = p->private;
1123
1124 return (*pos < stats->ls_num) ? pos : NULL;
1125 }
1126
lprocfs_stats_seq_stop(struct seq_file * p,void * v)1127 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
1128 {
1129 }
1130
lprocfs_stats_seq_next(struct seq_file * p,void * v,loff_t * pos)1131 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
1132 {
1133 (*pos)++;
1134 return lprocfs_stats_seq_start(p, pos);
1135 }
1136
1137 /* seq file export of one lprocfs counter */
lprocfs_stats_seq_show(struct seq_file * p,void * v)1138 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
1139 {
1140 struct lprocfs_stats *stats = p->private;
1141 struct lprocfs_counter_header *hdr;
1142 struct lprocfs_counter ctr;
1143 int idx = *(loff_t *)v;
1144
1145 if (idx == 0) {
1146 struct timespec64 now;
1147
1148 ktime_get_real_ts64(&now);
1149 seq_printf(p, "%-25s %llu.%9lu secs.usecs\n",
1150 "snapshot_time",
1151 (s64)now.tv_sec, (unsigned long)now.tv_nsec);
1152 }
1153
1154 hdr = &stats->ls_cnt_header[idx];
1155 lprocfs_stats_collect(stats, idx, &ctr);
1156
1157 if (ctr.lc_count != 0) {
1158 seq_printf(p, "%-25s %lld samples [%s]",
1159 hdr->lc_name, ctr.lc_count, hdr->lc_units);
1160
1161 if ((hdr->lc_config & LPROCFS_CNTR_AVGMINMAX) &&
1162 (ctr.lc_count > 0)) {
1163 seq_printf(p, " %lld %lld %lld",
1164 ctr.lc_min, ctr.lc_max, ctr.lc_sum);
1165 if (hdr->lc_config & LPROCFS_CNTR_STDDEV)
1166 seq_printf(p, " %lld", ctr.lc_sumsquare);
1167 }
1168 seq_putc(p, '\n');
1169 }
1170
1171 return 0;
1172 }
1173
1174 static const struct seq_operations lprocfs_stats_seq_sops = {
1175 .start = lprocfs_stats_seq_start,
1176 .stop = lprocfs_stats_seq_stop,
1177 .next = lprocfs_stats_seq_next,
1178 .show = lprocfs_stats_seq_show,
1179 };
1180
lprocfs_stats_seq_open(struct inode * inode,struct file * file)1181 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
1182 {
1183 struct seq_file *seq;
1184 int rc;
1185
1186 rc = seq_open(file, &lprocfs_stats_seq_sops);
1187 if (rc)
1188 return rc;
1189
1190 seq = file->private_data;
1191 seq->private = inode->i_private;
1192
1193 return 0;
1194 }
1195
1196 struct file_operations lprocfs_stats_seq_fops = {
1197 .owner = THIS_MODULE,
1198 .open = lprocfs_stats_seq_open,
1199 .read = seq_read,
1200 .write = lprocfs_stats_seq_write,
1201 .llseek = seq_lseek,
1202 .release = lprocfs_seq_release,
1203 };
1204
ldebugfs_register_stats(struct dentry * parent,const char * name,struct lprocfs_stats * stats)1205 int ldebugfs_register_stats(struct dentry *parent, const char *name,
1206 struct lprocfs_stats *stats)
1207 {
1208 struct dentry *entry;
1209
1210 LASSERT(!IS_ERR_OR_NULL(parent));
1211
1212 entry = debugfs_create_file(name, 0644, parent, stats,
1213 &lprocfs_stats_seq_fops);
1214 if (IS_ERR_OR_NULL(entry))
1215 return entry ? PTR_ERR(entry) : -ENOMEM;
1216
1217 return 0;
1218 }
1219 EXPORT_SYMBOL(ldebugfs_register_stats);
1220
lprocfs_counter_init(struct lprocfs_stats * stats,int index,unsigned conf,const char * name,const char * units)1221 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
1222 unsigned conf, const char *name, const char *units)
1223 {
1224 struct lprocfs_counter_header *header;
1225 struct lprocfs_counter *percpu_cntr;
1226 unsigned long flags = 0;
1227 unsigned int i;
1228 unsigned int num_cpu;
1229
1230 LASSERT(stats != NULL);
1231
1232 header = &stats->ls_cnt_header[index];
1233 LASSERTF(header != NULL, "Failed to allocate stats header:[%d]%s/%s\n",
1234 index, name, units);
1235
1236 header->lc_config = conf;
1237 header->lc_name = name;
1238 header->lc_units = units;
1239
1240 num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1241 for (i = 0; i < num_cpu; ++i) {
1242 if (stats->ls_percpu[i] == NULL)
1243 continue;
1244 percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
1245 percpu_cntr->lc_count = 0;
1246 percpu_cntr->lc_min = LC_MIN_INIT;
1247 percpu_cntr->lc_max = 0;
1248 percpu_cntr->lc_sumsquare = 0;
1249 percpu_cntr->lc_sum = 0;
1250 if ((stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1251 percpu_cntr->lc_sum_irq = 0;
1252 }
1253 lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1254 }
1255 EXPORT_SYMBOL(lprocfs_counter_init);
1256
lprocfs_exp_cleanup(struct obd_export * exp)1257 int lprocfs_exp_cleanup(struct obd_export *exp)
1258 {
1259 return 0;
1260 }
1261 EXPORT_SYMBOL(lprocfs_exp_cleanup);
1262
lprocfs_read_helper(struct lprocfs_counter * lc,struct lprocfs_counter_header * header,enum lprocfs_stats_flags flags,enum lprocfs_fields_flags field)1263 __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
1264 struct lprocfs_counter_header *header,
1265 enum lprocfs_stats_flags flags,
1266 enum lprocfs_fields_flags field)
1267 {
1268 __s64 ret = 0;
1269
1270 if (lc == NULL || header == NULL)
1271 return 0;
1272
1273 switch (field) {
1274 case LPROCFS_FIELDS_FLAGS_CONFIG:
1275 ret = header->lc_config;
1276 break;
1277 case LPROCFS_FIELDS_FLAGS_SUM:
1278 ret = lc->lc_sum;
1279 if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1280 ret += lc->lc_sum_irq;
1281 break;
1282 case LPROCFS_FIELDS_FLAGS_MIN:
1283 ret = lc->lc_min;
1284 break;
1285 case LPROCFS_FIELDS_FLAGS_MAX:
1286 ret = lc->lc_max;
1287 break;
1288 case LPROCFS_FIELDS_FLAGS_AVG:
1289 ret = (lc->lc_max - lc->lc_min) / 2;
1290 break;
1291 case LPROCFS_FIELDS_FLAGS_SUMSQUARE:
1292 ret = lc->lc_sumsquare;
1293 break;
1294 case LPROCFS_FIELDS_FLAGS_COUNT:
1295 ret = lc->lc_count;
1296 break;
1297 default:
1298 break;
1299 }
1300
1301 return 0;
1302 }
1303 EXPORT_SYMBOL(lprocfs_read_helper);
1304
lprocfs_write_helper(const char __user * buffer,unsigned long count,int * val)1305 int lprocfs_write_helper(const char __user *buffer, unsigned long count,
1306 int *val)
1307 {
1308 return lprocfs_write_frac_helper(buffer, count, val, 1);
1309 }
1310 EXPORT_SYMBOL(lprocfs_write_helper);
1311
lprocfs_write_u64_helper(const char __user * buffer,unsigned long count,__u64 * val)1312 int lprocfs_write_u64_helper(const char __user *buffer, unsigned long count,
1313 __u64 *val)
1314 {
1315 return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
1316 }
1317 EXPORT_SYMBOL(lprocfs_write_u64_helper);
1318
lprocfs_write_frac_u64_helper(const char * buffer,unsigned long count,__u64 * val,int mult)1319 int lprocfs_write_frac_u64_helper(const char *buffer, unsigned long count,
1320 __u64 *val, int mult)
1321 {
1322 char kernbuf[22], *end, *pbuf;
1323 __u64 whole, frac = 0, units;
1324 unsigned frac_d = 1;
1325 int sign = 1;
1326
1327 if (count > (sizeof(kernbuf) - 1))
1328 return -EINVAL;
1329
1330 if (copy_from_user(kernbuf, buffer, count))
1331 return -EFAULT;
1332
1333 kernbuf[count] = '\0';
1334 pbuf = kernbuf;
1335 if (*pbuf == '-') {
1336 sign = -1;
1337 pbuf++;
1338 }
1339
1340 whole = simple_strtoull(pbuf, &end, 10);
1341 if (pbuf == end)
1342 return -EINVAL;
1343
1344 if (*end == '.') {
1345 int i;
1346
1347 pbuf = end + 1;
1348
1349 /* need to limit frac_d to a __u32 */
1350 if (strlen(pbuf) > 10)
1351 pbuf[10] = '\0';
1352
1353 frac = simple_strtoull(pbuf, &end, 10);
1354 /* count decimal places */
1355 for (i = 0; i < (end - pbuf); i++)
1356 frac_d *= 10;
1357 }
1358
1359 units = 1;
1360 switch (tolower(*end)) {
1361 case 'p':
1362 units <<= 10;
1363 case 't':
1364 units <<= 10;
1365 case 'g':
1366 units <<= 10;
1367 case 'm':
1368 units <<= 10;
1369 case 'k':
1370 units <<= 10;
1371 }
1372 /* Specified units override the multiplier */
1373 if (units > 1)
1374 mult = units;
1375
1376 frac *= mult;
1377 do_div(frac, frac_d);
1378 *val = sign * (whole * mult + frac);
1379 return 0;
1380 }
1381 EXPORT_SYMBOL(lprocfs_write_frac_u64_helper);
1382
lprocfs_strnstr(const char * s1,const char * s2,size_t len)1383 static char *lprocfs_strnstr(const char *s1, const char *s2, size_t len)
1384 {
1385 size_t l2;
1386
1387 l2 = strlen(s2);
1388 if (!l2)
1389 return (char *)s1;
1390 while (len >= l2) {
1391 len--;
1392 if (!memcmp(s1, s2, l2))
1393 return (char *)s1;
1394 s1++;
1395 }
1396 return NULL;
1397 }
1398
1399 /**
1400 * Find the string \a name in the input \a buffer, and return a pointer to the
1401 * value immediately following \a name, reducing \a count appropriately.
1402 * If \a name is not found the original \a buffer is returned.
1403 */
lprocfs_find_named_value(const char * buffer,const char * name,size_t * count)1404 char *lprocfs_find_named_value(const char *buffer, const char *name,
1405 size_t *count)
1406 {
1407 char *val;
1408 size_t buflen = *count;
1409
1410 /* there is no strnstr() in rhel5 and ubuntu kernels */
1411 val = lprocfs_strnstr(buffer, name, buflen);
1412 if (val == NULL)
1413 return (char *)buffer;
1414
1415 val += strlen(name); /* skip prefix */
1416 while (val < buffer + buflen && isspace(*val)) /* skip separator */
1417 val++;
1418
1419 *count = 0;
1420 while (val < buffer + buflen && isalnum(*val)) {
1421 ++*count;
1422 ++val;
1423 }
1424
1425 return val - *count;
1426 }
1427 EXPORT_SYMBOL(lprocfs_find_named_value);
1428
ldebugfs_seq_create(struct dentry * parent,const char * name,umode_t mode,const struct file_operations * seq_fops,void * data)1429 int ldebugfs_seq_create(struct dentry *parent,
1430 const char *name,
1431 umode_t mode,
1432 const struct file_operations *seq_fops,
1433 void *data)
1434 {
1435 struct dentry *entry;
1436
1437 /* Disallow secretly (un)writable entries. */
1438 LASSERT((seq_fops->write == NULL) == ((mode & 0222) == 0));
1439
1440 entry = debugfs_create_file(name, mode, parent, data, seq_fops);
1441 if (IS_ERR_OR_NULL(entry))
1442 return entry ? PTR_ERR(entry) : -ENOMEM;
1443
1444 return 0;
1445 }
1446 EXPORT_SYMBOL(ldebugfs_seq_create);
1447
ldebugfs_obd_seq_create(struct obd_device * dev,const char * name,umode_t mode,const struct file_operations * seq_fops,void * data)1448 int ldebugfs_obd_seq_create(struct obd_device *dev,
1449 const char *name,
1450 umode_t mode,
1451 const struct file_operations *seq_fops,
1452 void *data)
1453 {
1454 return ldebugfs_seq_create(dev->obd_debugfs_entry, name,
1455 mode, seq_fops, data);
1456 }
1457 EXPORT_SYMBOL(ldebugfs_obd_seq_create);
1458
lprocfs_oh_tally(struct obd_histogram * oh,unsigned int value)1459 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
1460 {
1461 if (value >= OBD_HIST_MAX)
1462 value = OBD_HIST_MAX - 1;
1463
1464 spin_lock(&oh->oh_lock);
1465 oh->oh_buckets[value]++;
1466 spin_unlock(&oh->oh_lock);
1467 }
1468 EXPORT_SYMBOL(lprocfs_oh_tally);
1469
lprocfs_oh_tally_log2(struct obd_histogram * oh,unsigned int value)1470 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
1471 {
1472 unsigned int val;
1473
1474 for (val = 0; ((1 << val) < value) && (val <= OBD_HIST_MAX); val++)
1475 ;
1476
1477 lprocfs_oh_tally(oh, val);
1478 }
1479 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
1480
lprocfs_oh_sum(struct obd_histogram * oh)1481 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
1482 {
1483 unsigned long ret = 0;
1484 int i;
1485
1486 for (i = 0; i < OBD_HIST_MAX; i++)
1487 ret += oh->oh_buckets[i];
1488 return ret;
1489 }
1490 EXPORT_SYMBOL(lprocfs_oh_sum);
1491
lprocfs_oh_clear(struct obd_histogram * oh)1492 void lprocfs_oh_clear(struct obd_histogram *oh)
1493 {
1494 spin_lock(&oh->oh_lock);
1495 memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
1496 spin_unlock(&oh->oh_lock);
1497 }
1498 EXPORT_SYMBOL(lprocfs_oh_clear);
1499
lustre_attr_show(struct kobject * kobj,struct attribute * attr,char * buf)1500 static ssize_t lustre_attr_show(struct kobject *kobj,
1501 struct attribute *attr, char *buf)
1502 {
1503 struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
1504
1505 return a->show ? a->show(kobj, attr, buf) : 0;
1506 }
1507
lustre_attr_store(struct kobject * kobj,struct attribute * attr,const char * buf,size_t len)1508 static ssize_t lustre_attr_store(struct kobject *kobj, struct attribute *attr,
1509 const char *buf, size_t len)
1510 {
1511 struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
1512
1513 return a->store ? a->store(kobj, attr, buf, len) : len;
1514 }
1515
1516 const struct sysfs_ops lustre_sysfs_ops = {
1517 .show = lustre_attr_show,
1518 .store = lustre_attr_store,
1519 };
1520 EXPORT_SYMBOL_GPL(lustre_sysfs_ops);
1521