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Merge remote-tracking branch 'staging/staging-next'
[deliverable/linux.git] / drivers / staging / lustre / lustre / obdclass / lprocfs_status.c
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.gnu.org/licenses/gpl-2.0.html
19 *
20 * GPL HEADER END
21 */
22 /*
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
25 *
26 * Copyright (c) 2011, 2015, Intel Corporation.
27 */
28 /*
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
31 *
32 * lustre/obdclass/lprocfs_status.c
33 *
34 * Author: Hariharan Thantry <thantry@users.sourceforge.net>
35 */
36
37 #define DEBUG_SUBSYSTEM S_CLASS
38
39 #include "../include/obd_class.h"
40 #include "../include/lprocfs_status.h"
41 #include "../include/lustre/lustre_idl.h"
42 #include <linux/seq_file.h>
43 #include <linux/ctype.h>
44
45 static const char * const obd_connect_names[] = {
46 "read_only",
47 "lov_index",
48 "connect_from_mds",
49 "write_grant",
50 "server_lock",
51 "version",
52 "request_portal",
53 "acl",
54 "xattr",
55 "create_on_write",
56 "truncate_lock",
57 "initial_transno",
58 "inode_bit_locks",
59 "join_file(obsolete)",
60 "getattr_by_fid",
61 "no_oh_for_devices",
62 "remote_client",
63 "remote_client_by_force",
64 "max_byte_per_rpc",
65 "64bit_qdata",
66 "mds_capability",
67 "oss_capability",
68 "early_lock_cancel",
69 "som",
70 "adaptive_timeouts",
71 "lru_resize",
72 "mds_mds_connection",
73 "real_conn",
74 "change_qunit_size",
75 "alt_checksum_algorithm",
76 "fid_is_enabled",
77 "version_recovery",
78 "pools",
79 "grant_shrink",
80 "skip_orphan",
81 "large_ea",
82 "full20",
83 "layout_lock",
84 "64bithash",
85 "object_max_bytes",
86 "imp_recov",
87 "jobstats",
88 "umask",
89 "einprogress",
90 "grant_param",
91 "flock_owner",
92 "lvb_type",
93 "nanoseconds_times",
94 "lightweight_conn",
95 "short_io",
96 "pingless",
97 "flock_deadlock",
98 "disp_stripe",
99 "open_by_fid",
100 "lfsck",
101 "unknown",
102 "unlink_close",
103 "unknown",
104 "dir_stripe",
105 "unknown",
106 NULL
107 };
108
109 int obd_connect_flags2str(char *page, int count, __u64 flags, char *sep)
110 {
111 __u64 mask = 1;
112 int i, ret = 0;
113
114 for (i = 0; obd_connect_names[i]; i++, mask <<= 1) {
115 if (flags & mask)
116 ret += snprintf(page + ret, count - ret, "%s%s",
117 ret ? sep : "", obd_connect_names[i]);
118 }
119 if (flags & ~(mask - 1))
120 ret += snprintf(page + ret, count - ret,
121 "%sunknown flags %#llx",
122 ret ? sep : "", flags & ~(mask - 1));
123 return ret;
124 }
125 EXPORT_SYMBOL(obd_connect_flags2str);
126
127 static void obd_connect_data_seqprint(struct seq_file *m,
128 struct obd_connect_data *ocd)
129 {
130 int flags;
131
132 LASSERT(ocd);
133 flags = ocd->ocd_connect_flags;
134
135 seq_printf(m, " connect_data:\n"
136 " flags: %llx\n"
137 " instance: %u\n",
138 ocd->ocd_connect_flags,
139 ocd->ocd_instance);
140 if (flags & OBD_CONNECT_VERSION)
141 seq_printf(m, " target_version: %u.%u.%u.%u\n",
142 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
143 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
144 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
145 OBD_OCD_VERSION_FIX(ocd->ocd_version));
146 if (flags & OBD_CONNECT_MDS)
147 seq_printf(m, " mdt_index: %d\n", ocd->ocd_group);
148 if (flags & OBD_CONNECT_GRANT)
149 seq_printf(m, " initial_grant: %d\n", ocd->ocd_grant);
150 if (flags & OBD_CONNECT_INDEX)
151 seq_printf(m, " target_index: %u\n", ocd->ocd_index);
152 if (flags & OBD_CONNECT_BRW_SIZE)
153 seq_printf(m, " max_brw_size: %d\n", ocd->ocd_brw_size);
154 if (flags & OBD_CONNECT_IBITS)
155 seq_printf(m, " ibits_known: %llx\n",
156 ocd->ocd_ibits_known);
157 if (flags & OBD_CONNECT_GRANT_PARAM)
158 seq_printf(m, " grant_block_size: %d\n"
159 " grant_inode_size: %d\n"
160 " grant_extent_overhead: %d\n",
161 ocd->ocd_blocksize,
162 ocd->ocd_inodespace,
163 ocd->ocd_grant_extent);
164 if (flags & OBD_CONNECT_TRANSNO)
165 seq_printf(m, " first_transno: %llx\n",
166 ocd->ocd_transno);
167 if (flags & OBD_CONNECT_CKSUM)
168 seq_printf(m, " cksum_types: %#x\n",
169 ocd->ocd_cksum_types);
170 if (flags & OBD_CONNECT_MAX_EASIZE)
171 seq_printf(m, " max_easize: %d\n", ocd->ocd_max_easize);
172 if (flags & OBD_CONNECT_MAXBYTES)
173 seq_printf(m, " max_object_bytes: %llx\n",
174 ocd->ocd_maxbytes);
175 }
176
177 int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
178 int mult)
179 {
180 long decimal_val, frac_val;
181 int prtn;
182
183 if (count < 10)
184 return -EINVAL;
185
186 decimal_val = val / mult;
187 prtn = snprintf(buffer, count, "%ld", decimal_val);
188 frac_val = val % mult;
189
190 if (prtn < (count - 4) && frac_val > 0) {
191 long temp_frac;
192 int i, temp_mult = 1, frac_bits = 0;
193
194 temp_frac = frac_val * 10;
195 buffer[prtn++] = '.';
196 while (frac_bits < 2 && (temp_frac / mult) < 1) {
197 /* only reserved 2 bits fraction */
198 buffer[prtn++] = '0';
199 temp_frac *= 10;
200 frac_bits++;
201 }
202 /*
203 * Need to think these cases :
204 * 1. #echo x.00 > /sys/xxx output result : x
205 * 2. #echo x.0x > /sys/xxx output result : x.0x
206 * 3. #echo x.x0 > /sys/xxx output result : x.x
207 * 4. #echo x.xx > /sys/xxx output result : x.xx
208 * Only reserved 2 bits fraction.
209 */
210 for (i = 0; i < (5 - prtn); i++)
211 temp_mult *= 10;
212
213 frac_bits = min((int)count - prtn, 3 - frac_bits);
214 prtn += snprintf(buffer + prtn, frac_bits, "%ld",
215 frac_val * temp_mult / mult);
216
217 prtn--;
218 while (buffer[prtn] < '1' || buffer[prtn] > '9') {
219 prtn--;
220 if (buffer[prtn] == '.') {
221 prtn--;
222 break;
223 }
224 }
225 prtn++;
226 }
227 buffer[prtn++] = '\n';
228 return prtn;
229 }
230 EXPORT_SYMBOL(lprocfs_read_frac_helper);
231
232 int lprocfs_write_frac_helper(const char __user *buffer, unsigned long count,
233 int *val, int mult)
234 {
235 char kernbuf[20], *end, *pbuf;
236
237 if (count > (sizeof(kernbuf) - 1))
238 return -EINVAL;
239
240 if (copy_from_user(kernbuf, buffer, count))
241 return -EFAULT;
242
243 kernbuf[count] = '\0';
244 pbuf = kernbuf;
245 if (*pbuf == '-') {
246 mult = -mult;
247 pbuf++;
248 }
249
250 *val = (int)simple_strtoul(pbuf, &end, 10) * mult;
251 if (pbuf == end)
252 return -EINVAL;
253
254 if (end && *end == '.') {
255 int temp_val, pow = 1;
256 int i;
257
258 pbuf = end + 1;
259 if (strlen(pbuf) > 5)
260 pbuf[5] = '\0'; /*only allow 5bits fractional*/
261
262 temp_val = (int)simple_strtoul(pbuf, &end, 10) * mult;
263
264 if (pbuf < end) {
265 for (i = 0; i < (end - pbuf); i++)
266 pow *= 10;
267
268 *val += temp_val / pow;
269 }
270 }
271 return 0;
272 }
273 EXPORT_SYMBOL(lprocfs_write_frac_helper);
274
275 static int lprocfs_no_percpu_stats;
276 module_param(lprocfs_no_percpu_stats, int, 0644);
277 MODULE_PARM_DESC(lprocfs_no_percpu_stats, "Do not alloc percpu data for lprocfs stats");
278
279 #define MAX_STRING_SIZE 128
280
281 int lprocfs_single_release(struct inode *inode, struct file *file)
282 {
283 return single_release(inode, file);
284 }
285 EXPORT_SYMBOL(lprocfs_single_release);
286
287 int lprocfs_seq_release(struct inode *inode, struct file *file)
288 {
289 return seq_release(inode, file);
290 }
291 EXPORT_SYMBOL(lprocfs_seq_release);
292
293 /* lprocfs API calls */
294
295 struct dentry *ldebugfs_add_simple(struct dentry *root,
296 char *name, void *data,
297 struct file_operations *fops)
298 {
299 struct dentry *entry;
300 umode_t mode = 0;
301
302 if (!root || !name || !fops)
303 return ERR_PTR(-EINVAL);
304
305 if (fops->read)
306 mode = 0444;
307 if (fops->write)
308 mode |= 0200;
309 entry = debugfs_create_file(name, mode, root, data, fops);
310 if (IS_ERR_OR_NULL(entry)) {
311 CERROR("LprocFS: No memory to create <debugfs> entry %s\n", name);
312 return entry ?: ERR_PTR(-ENOMEM);
313 }
314 return entry;
315 }
316 EXPORT_SYMBOL_GPL(ldebugfs_add_simple);
317
318 static const struct file_operations lprocfs_generic_fops = { };
319
320 int ldebugfs_add_vars(struct dentry *parent,
321 struct lprocfs_vars *list,
322 void *data)
323 {
324 if (IS_ERR_OR_NULL(parent) || IS_ERR_OR_NULL(list))
325 return -EINVAL;
326
327 while (list->name) {
328 struct dentry *entry;
329 umode_t mode = 0;
330
331 if (list->proc_mode != 0000) {
332 mode = list->proc_mode;
333 } else if (list->fops) {
334 if (list->fops->read)
335 mode = 0444;
336 if (list->fops->write)
337 mode |= 0200;
338 }
339 entry = debugfs_create_file(list->name, mode, parent,
340 list->data ?: data,
341 list->fops ?: &lprocfs_generic_fops
342 );
343 if (IS_ERR_OR_NULL(entry))
344 return entry ? PTR_ERR(entry) : -ENOMEM;
345 list++;
346 }
347 return 0;
348 }
349 EXPORT_SYMBOL_GPL(ldebugfs_add_vars);
350
351 void ldebugfs_remove(struct dentry **entryp)
352 {
353 debugfs_remove_recursive(*entryp);
354 *entryp = NULL;
355 }
356 EXPORT_SYMBOL_GPL(ldebugfs_remove);
357
358 struct dentry *ldebugfs_register(const char *name,
359 struct dentry *parent,
360 struct lprocfs_vars *list, void *data)
361 {
362 struct dentry *entry;
363
364 entry = debugfs_create_dir(name, parent);
365 if (IS_ERR_OR_NULL(entry)) {
366 entry = entry ?: ERR_PTR(-ENOMEM);
367 goto out;
368 }
369
370 if (!IS_ERR_OR_NULL(list)) {
371 int rc;
372
373 rc = ldebugfs_add_vars(entry, list, data);
374 if (rc != 0) {
375 debugfs_remove(entry);
376 entry = ERR_PTR(rc);
377 }
378 }
379 out:
380 return entry;
381 }
382 EXPORT_SYMBOL_GPL(ldebugfs_register);
383
384 /* Generic callbacks */
385 int lprocfs_rd_uint(struct seq_file *m, void *data)
386 {
387 seq_printf(m, "%u\n", *(unsigned int *)data);
388 return 0;
389 }
390 EXPORT_SYMBOL(lprocfs_rd_uint);
391
392 int lprocfs_wr_uint(struct file *file, const char __user *buffer,
393 unsigned long count, void *data)
394 {
395 unsigned *p = data;
396 char dummy[MAX_STRING_SIZE + 1], *end;
397 unsigned long tmp;
398
399 dummy[MAX_STRING_SIZE] = '\0';
400 if (copy_from_user(dummy, buffer, MAX_STRING_SIZE))
401 return -EFAULT;
402
403 tmp = simple_strtoul(dummy, &end, 0);
404 if (dummy == end)
405 return -EINVAL;
406
407 *p = (unsigned int)tmp;
408 return count;
409 }
410 EXPORT_SYMBOL(lprocfs_wr_uint);
411
412 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
413 char *buf)
414 {
415 struct obd_device *obd = container_of(kobj, struct obd_device,
416 obd_kobj);
417
418 return sprintf(buf, "%s\n", obd->obd_uuid.uuid);
419 }
420 LUSTRE_RO_ATTR(uuid);
421
422 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
423 char *buf)
424 {
425 struct obd_device *obd = container_of(kobj, struct obd_device,
426 obd_kobj);
427 struct obd_statfs osfs;
428 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
429 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
430 OBD_STATFS_NODELAY);
431 if (!rc)
432 return sprintf(buf, "%u\n", osfs.os_bsize);
433
434 return rc;
435 }
436 LUSTRE_RO_ATTR(blocksize);
437
438 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
439 char *buf)
440 {
441 struct obd_device *obd = container_of(kobj, struct obd_device,
442 obd_kobj);
443 struct obd_statfs osfs;
444 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
445 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
446 OBD_STATFS_NODELAY);
447 if (!rc) {
448 __u32 blk_size = osfs.os_bsize >> 10;
449 __u64 result = osfs.os_blocks;
450
451 while (blk_size >>= 1)
452 result <<= 1;
453
454 return sprintf(buf, "%llu\n", result);
455 }
456
457 return rc;
458 }
459 LUSTRE_RO_ATTR(kbytestotal);
460
461 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
462 char *buf)
463 {
464 struct obd_device *obd = container_of(kobj, struct obd_device,
465 obd_kobj);
466 struct obd_statfs osfs;
467 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
468 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
469 OBD_STATFS_NODELAY);
470 if (!rc) {
471 __u32 blk_size = osfs.os_bsize >> 10;
472 __u64 result = osfs.os_bfree;
473
474 while (blk_size >>= 1)
475 result <<= 1;
476
477 return sprintf(buf, "%llu\n", result);
478 }
479
480 return rc;
481 }
482 LUSTRE_RO_ATTR(kbytesfree);
483
484 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
485 char *buf)
486 {
487 struct obd_device *obd = container_of(kobj, struct obd_device,
488 obd_kobj);
489 struct obd_statfs osfs;
490 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
491 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
492 OBD_STATFS_NODELAY);
493 if (!rc) {
494 __u32 blk_size = osfs.os_bsize >> 10;
495 __u64 result = osfs.os_bavail;
496
497 while (blk_size >>= 1)
498 result <<= 1;
499
500 return sprintf(buf, "%llu\n", result);
501 }
502
503 return rc;
504 }
505 LUSTRE_RO_ATTR(kbytesavail);
506
507 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
508 char *buf)
509 {
510 struct obd_device *obd = container_of(kobj, struct obd_device,
511 obd_kobj);
512 struct obd_statfs osfs;
513 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
514 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
515 OBD_STATFS_NODELAY);
516 if (!rc)
517 return sprintf(buf, "%llu\n", osfs.os_files);
518
519 return rc;
520 }
521 LUSTRE_RO_ATTR(filestotal);
522
523 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
524 char *buf)
525 {
526 struct obd_device *obd = container_of(kobj, struct obd_device,
527 obd_kobj);
528 struct obd_statfs osfs;
529 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
530 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
531 OBD_STATFS_NODELAY);
532 if (!rc)
533 return sprintf(buf, "%llu\n", osfs.os_ffree);
534
535 return rc;
536 }
537 LUSTRE_RO_ATTR(filesfree);
538
539 int lprocfs_rd_server_uuid(struct seq_file *m, void *data)
540 {
541 struct obd_device *obd = data;
542 struct obd_import *imp;
543 char *imp_state_name = NULL;
544 int rc;
545
546 LASSERT(obd);
547 rc = lprocfs_climp_check(obd);
548 if (rc)
549 return rc;
550
551 imp = obd->u.cli.cl_import;
552 imp_state_name = ptlrpc_import_state_name(imp->imp_state);
553 seq_printf(m, "%s\t%s%s\n",
554 obd2cli_tgt(obd), imp_state_name,
555 imp->imp_deactive ? "\tDEACTIVATED" : "");
556
557 up_read(&obd->u.cli.cl_sem);
558
559 return 0;
560 }
561 EXPORT_SYMBOL(lprocfs_rd_server_uuid);
562
563 int lprocfs_rd_conn_uuid(struct seq_file *m, void *data)
564 {
565 struct obd_device *obd = data;
566 struct ptlrpc_connection *conn;
567 int rc;
568
569 LASSERT(obd);
570
571 rc = lprocfs_climp_check(obd);
572 if (rc)
573 return rc;
574
575 conn = obd->u.cli.cl_import->imp_connection;
576 if (conn && obd->u.cli.cl_import)
577 seq_printf(m, "%s\n", conn->c_remote_uuid.uuid);
578 else
579 seq_puts(m, "<none>\n");
580
581 up_read(&obd->u.cli.cl_sem);
582
583 return 0;
584 }
585 EXPORT_SYMBOL(lprocfs_rd_conn_uuid);
586
587 /** add up per-cpu counters */
588 void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
589 struct lprocfs_counter *cnt)
590 {
591 unsigned int num_entry;
592 struct lprocfs_counter *percpu_cntr;
593 int i;
594 unsigned long flags = 0;
595
596 memset(cnt, 0, sizeof(*cnt));
597
598 if (!stats) {
599 /* set count to 1 to avoid divide-by-zero errs in callers */
600 cnt->lc_count = 1;
601 return;
602 }
603
604 cnt->lc_min = LC_MIN_INIT;
605
606 num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
607
608 for (i = 0; i < num_entry; i++) {
609 if (!stats->ls_percpu[i])
610 continue;
611 percpu_cntr = lprocfs_stats_counter_get(stats, i, idx);
612
613 cnt->lc_count += percpu_cntr->lc_count;
614 cnt->lc_sum += percpu_cntr->lc_sum;
615 if (percpu_cntr->lc_min < cnt->lc_min)
616 cnt->lc_min = percpu_cntr->lc_min;
617 if (percpu_cntr->lc_max > cnt->lc_max)
618 cnt->lc_max = percpu_cntr->lc_max;
619 cnt->lc_sumsquare += percpu_cntr->lc_sumsquare;
620 }
621
622 lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
623 }
624 EXPORT_SYMBOL(lprocfs_stats_collect);
625
626 /**
627 * Append a space separated list of current set flags to str.
628 */
629 #define flag2str(flag, first) \
630 do { \
631 if (imp->imp_##flag) \
632 seq_printf(m, "%s" #flag, first ? "" : ", "); \
633 } while (0)
634 static int obd_import_flags2str(struct obd_import *imp, struct seq_file *m)
635 {
636 bool first = true;
637
638 if (imp->imp_obd->obd_no_recov) {
639 seq_printf(m, "no_recov");
640 first = false;
641 }
642
643 flag2str(invalid, first);
644 first = false;
645 flag2str(deactive, first);
646 flag2str(replayable, first);
647 flag2str(pingable, first);
648 return 0;
649 }
650
651 #undef flags2str
652
653 static void obd_connect_seq_flags2str(struct seq_file *m, __u64 flags, char *sep)
654 {
655 __u64 mask = 1;
656 int i;
657 bool first = true;
658
659 for (i = 0; obd_connect_names[i]; i++, mask <<= 1) {
660 if (flags & mask) {
661 seq_printf(m, "%s%s",
662 first ? sep : "", obd_connect_names[i]);
663 first = false;
664 }
665 }
666 if (flags & ~(mask - 1))
667 seq_printf(m, "%sunknown flags %#llx",
668 first ? sep : "", flags & ~(mask - 1));
669 }
670
671 int lprocfs_rd_import(struct seq_file *m, void *data)
672 {
673 char nidstr[LNET_NIDSTR_SIZE];
674 struct lprocfs_counter ret;
675 struct lprocfs_counter_header *header;
676 struct obd_device *obd = data;
677 struct obd_import *imp;
678 struct obd_import_conn *conn;
679 struct obd_connect_data *ocd;
680 int j;
681 int k;
682 int rw = 0;
683 int rc;
684
685 LASSERT(obd);
686 rc = lprocfs_climp_check(obd);
687 if (rc)
688 return rc;
689
690 imp = obd->u.cli.cl_import;
691 ocd = &imp->imp_connect_data;
692
693 seq_printf(m, "import:\n"
694 " name: %s\n"
695 " target: %s\n"
696 " state: %s\n"
697 " instance: %u\n"
698 " connect_flags: [ ",
699 obd->obd_name,
700 obd2cli_tgt(obd),
701 ptlrpc_import_state_name(imp->imp_state),
702 imp->imp_connect_data.ocd_instance);
703 obd_connect_seq_flags2str(m, imp->imp_connect_data.ocd_connect_flags,
704 ", ");
705 seq_printf(m, " ]\n");
706 obd_connect_data_seqprint(m, ocd);
707 seq_printf(m, " import_flags: [ ");
708 obd_import_flags2str(imp, m);
709
710 seq_printf(m,
711 " ]\n"
712 " connection:\n"
713 " failover_nids: [ ");
714 spin_lock(&imp->imp_lock);
715 j = 0;
716 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
717 libcfs_nid2str_r(conn->oic_conn->c_peer.nid,
718 nidstr, sizeof(nidstr));
719 seq_printf(m, "%s%s", j ? ", " : "", nidstr);
720 j++;
721 }
722 if (imp->imp_connection)
723 libcfs_nid2str_r(imp->imp_connection->c_peer.nid,
724 nidstr, sizeof(nidstr));
725 else
726 strncpy(nidstr, "<none>", sizeof(nidstr));
727 seq_printf(m,
728 " ]\n"
729 " current_connection: %s\n"
730 " connection_attempts: %u\n"
731 " generation: %u\n"
732 " in-progress_invalidations: %u\n",
733 nidstr,
734 imp->imp_conn_cnt,
735 imp->imp_generation,
736 atomic_read(&imp->imp_inval_count));
737 spin_unlock(&imp->imp_lock);
738
739 if (!obd->obd_svc_stats)
740 goto out_climp;
741
742 header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
743 lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
744 if (ret.lc_count != 0) {
745 /* first argument to do_div MUST be __u64 */
746 __u64 sum = ret.lc_sum;
747
748 do_div(sum, ret.lc_count);
749 ret.lc_sum = sum;
750 } else {
751 ret.lc_sum = 0;
752 }
753 seq_printf(m,
754 " rpcs:\n"
755 " inflight: %u\n"
756 " unregistering: %u\n"
757 " timeouts: %u\n"
758 " avg_waittime: %llu %s\n",
759 atomic_read(&imp->imp_inflight),
760 atomic_read(&imp->imp_unregistering),
761 atomic_read(&imp->imp_timeouts),
762 ret.lc_sum, header->lc_units);
763
764 k = 0;
765 for (j = 0; j < IMP_AT_MAX_PORTALS; j++) {
766 if (imp->imp_at.iat_portal[j] == 0)
767 break;
768 k = max_t(unsigned int, k,
769 at_get(&imp->imp_at.iat_service_estimate[j]));
770 }
771 seq_printf(m,
772 " service_estimates:\n"
773 " services: %u sec\n"
774 " network: %u sec\n",
775 k,
776 at_get(&imp->imp_at.iat_net_latency));
777
778 seq_printf(m,
779 " transactions:\n"
780 " last_replay: %llu\n"
781 " peer_committed: %llu\n"
782 " last_checked: %llu\n",
783 imp->imp_last_replay_transno,
784 imp->imp_peer_committed_transno,
785 imp->imp_last_transno_checked);
786
787 /* avg data rates */
788 for (rw = 0; rw <= 1; rw++) {
789 lprocfs_stats_collect(obd->obd_svc_stats,
790 PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
791 &ret);
792 if (ret.lc_sum > 0 && ret.lc_count > 0) {
793 /* first argument to do_div MUST be __u64 */
794 __u64 sum = ret.lc_sum;
795
796 do_div(sum, ret.lc_count);
797 ret.lc_sum = sum;
798 seq_printf(m,
799 " %s_data_averages:\n"
800 " bytes_per_rpc: %llu\n",
801 rw ? "write" : "read",
802 ret.lc_sum);
803 }
804 k = (int)ret.lc_sum;
805 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
806 header = &obd->obd_svc_stats->ls_cnt_header[j];
807 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
808 if (ret.lc_sum > 0 && ret.lc_count != 0) {
809 /* first argument to do_div MUST be __u64 */
810 __u64 sum = ret.lc_sum;
811
812 do_div(sum, ret.lc_count);
813 ret.lc_sum = sum;
814 seq_printf(m,
815 " %s_per_rpc: %llu\n",
816 header->lc_units, ret.lc_sum);
817 j = (int)ret.lc_sum;
818 if (j > 0)
819 seq_printf(m,
820 " MB_per_sec: %u.%.02u\n",
821 k / j, (100 * k / j) % 100);
822 }
823 }
824
825 out_climp:
826 up_read(&obd->u.cli.cl_sem);
827 return 0;
828 }
829 EXPORT_SYMBOL(lprocfs_rd_import);
830
831 int lprocfs_rd_state(struct seq_file *m, void *data)
832 {
833 struct obd_device *obd = data;
834 struct obd_import *imp;
835 int j, k, rc;
836
837 LASSERT(obd);
838 rc = lprocfs_climp_check(obd);
839 if (rc)
840 return rc;
841
842 imp = obd->u.cli.cl_import;
843
844 seq_printf(m, "current_state: %s\n",
845 ptlrpc_import_state_name(imp->imp_state));
846 seq_printf(m, "state_history:\n");
847 k = imp->imp_state_hist_idx;
848 for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
849 struct import_state_hist *ish =
850 &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
851 if (ish->ish_state == 0)
852 continue;
853 seq_printf(m, " - [ %lld, %s ]\n", (s64)ish->ish_time,
854 ptlrpc_import_state_name(ish->ish_state));
855 }
856
857 up_read(&obd->u.cli.cl_sem);
858 return 0;
859 }
860 EXPORT_SYMBOL(lprocfs_rd_state);
861
862 int lprocfs_at_hist_helper(struct seq_file *m, struct adaptive_timeout *at)
863 {
864 int i;
865
866 for (i = 0; i < AT_BINS; i++)
867 seq_printf(m, "%3u ", at->at_hist[i]);
868 seq_printf(m, "\n");
869 return 0;
870 }
871 EXPORT_SYMBOL(lprocfs_at_hist_helper);
872
873 /* See also ptlrpc_lprocfs_rd_timeouts */
874 int lprocfs_rd_timeouts(struct seq_file *m, void *data)
875 {
876 struct obd_device *obd = data;
877 struct obd_import *imp;
878 unsigned int cur, worst;
879 time64_t now, worstt;
880 struct dhms ts;
881 int i, rc;
882
883 LASSERT(obd);
884 rc = lprocfs_climp_check(obd);
885 if (rc)
886 return rc;
887
888 imp = obd->u.cli.cl_import;
889
890 now = ktime_get_real_seconds();
891
892 /* Some network health info for kicks */
893 s2dhms(&ts, now - imp->imp_last_reply_time);
894 seq_printf(m, "%-10s : %lld, " DHMS_FMT " ago\n",
895 "last reply", (s64)imp->imp_last_reply_time, DHMS_VARS(&ts));
896
897 cur = at_get(&imp->imp_at.iat_net_latency);
898 worst = imp->imp_at.iat_net_latency.at_worst_ever;
899 worstt = imp->imp_at.iat_net_latency.at_worst_time;
900 s2dhms(&ts, now - worstt);
901 seq_printf(m, "%-10s : cur %3u worst %3u (at %lld, " DHMS_FMT " ago) ",
902 "network", cur, worst, (s64)worstt, DHMS_VARS(&ts));
903 lprocfs_at_hist_helper(m, &imp->imp_at.iat_net_latency);
904
905 for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
906 if (imp->imp_at.iat_portal[i] == 0)
907 break;
908 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
909 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
910 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
911 s2dhms(&ts, now - worstt);
912 seq_printf(m, "portal %-2d : cur %3u worst %3u (at %lld, "
913 DHMS_FMT " ago) ", imp->imp_at.iat_portal[i],
914 cur, worst, (s64)worstt, DHMS_VARS(&ts));
915 lprocfs_at_hist_helper(m, &imp->imp_at.iat_service_estimate[i]);
916 }
917
918 up_read(&obd->u.cli.cl_sem);
919 return 0;
920 }
921 EXPORT_SYMBOL(lprocfs_rd_timeouts);
922
923 int lprocfs_rd_connect_flags(struct seq_file *m, void *data)
924 {
925 struct obd_device *obd = data;
926 __u64 flags;
927 int rc;
928
929 rc = lprocfs_climp_check(obd);
930 if (rc)
931 return rc;
932
933 flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
934 seq_printf(m, "flags=%#llx\n", flags);
935 obd_connect_seq_flags2str(m, flags, "\n");
936 seq_printf(m, "\n");
937 up_read(&obd->u.cli.cl_sem);
938 return 0;
939 }
940 EXPORT_SYMBOL(lprocfs_rd_connect_flags);
941
942 static struct attribute *obd_def_attrs[] = {
943 &lustre_attr_blocksize.attr,
944 &lustre_attr_kbytestotal.attr,
945 &lustre_attr_kbytesfree.attr,
946 &lustre_attr_kbytesavail.attr,
947 &lustre_attr_filestotal.attr,
948 &lustre_attr_filesfree.attr,
949 &lustre_attr_uuid.attr,
950 NULL,
951 };
952
953 static void obd_sysfs_release(struct kobject *kobj)
954 {
955 struct obd_device *obd = container_of(kobj, struct obd_device,
956 obd_kobj);
957
958 complete(&obd->obd_kobj_unregister);
959 }
960
961 static struct kobj_type obd_ktype = {
962 .default_attrs = obd_def_attrs,
963 .sysfs_ops = &lustre_sysfs_ops,
964 .release = obd_sysfs_release,
965 };
966
967 int lprocfs_obd_setup(struct obd_device *obd, struct lprocfs_vars *list,
968 struct attribute_group *attrs)
969 {
970 int rc = 0;
971
972 init_completion(&obd->obd_kobj_unregister);
973 rc = kobject_init_and_add(&obd->obd_kobj, &obd_ktype,
974 obd->obd_type->typ_kobj,
975 "%s", obd->obd_name);
976 if (rc)
977 return rc;
978
979 if (attrs) {
980 rc = sysfs_create_group(&obd->obd_kobj, attrs);
981 if (rc) {
982 kobject_put(&obd->obd_kobj);
983 return rc;
984 }
985 }
986
987 obd->obd_debugfs_entry = ldebugfs_register(obd->obd_name,
988 obd->obd_type->typ_debugfs_entry,
989 list, obd);
990 if (IS_ERR_OR_NULL(obd->obd_debugfs_entry)) {
991 rc = obd->obd_debugfs_entry ? PTR_ERR(obd->obd_debugfs_entry)
992 : -ENOMEM;
993 CERROR("error %d setting up lprocfs for %s\n",
994 rc, obd->obd_name);
995 obd->obd_debugfs_entry = NULL;
996 }
997
998 return rc;
999 }
1000 EXPORT_SYMBOL_GPL(lprocfs_obd_setup);
1001
1002 int lprocfs_obd_cleanup(struct obd_device *obd)
1003 {
1004 if (!obd)
1005 return -EINVAL;
1006
1007 if (!IS_ERR_OR_NULL(obd->obd_debugfs_entry))
1008 ldebugfs_remove(&obd->obd_debugfs_entry);
1009
1010 kobject_put(&obd->obd_kobj);
1011 wait_for_completion(&obd->obd_kobj_unregister);
1012
1013 return 0;
1014 }
1015 EXPORT_SYMBOL_GPL(lprocfs_obd_cleanup);
1016
1017 int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
1018 {
1019 struct lprocfs_counter *cntr;
1020 unsigned int percpusize;
1021 int rc = -ENOMEM;
1022 unsigned long flags = 0;
1023 int i;
1024
1025 LASSERT(!stats->ls_percpu[cpuid]);
1026 LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
1027
1028 percpusize = lprocfs_stats_counter_size(stats);
1029 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
1030 if (stats->ls_percpu[cpuid]) {
1031 rc = 0;
1032 if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
1033 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1034 spin_lock_irqsave(&stats->ls_lock, flags);
1035 else
1036 spin_lock(&stats->ls_lock);
1037 if (stats->ls_biggest_alloc_num <= cpuid)
1038 stats->ls_biggest_alloc_num = cpuid + 1;
1039 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1040 spin_unlock_irqrestore(&stats->ls_lock, flags);
1041 else
1042 spin_unlock(&stats->ls_lock);
1043 }
1044 /* initialize the ls_percpu[cpuid] non-zero counter */
1045 for (i = 0; i < stats->ls_num; ++i) {
1046 cntr = lprocfs_stats_counter_get(stats, cpuid, i);
1047 cntr->lc_min = LC_MIN_INIT;
1048 }
1049 }
1050 return rc;
1051 }
1052 EXPORT_SYMBOL(lprocfs_stats_alloc_one);
1053
1054 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
1055 enum lprocfs_stats_flags flags)
1056 {
1057 struct lprocfs_stats *stats;
1058 unsigned int num_entry;
1059 unsigned int percpusize = 0;
1060 int i;
1061
1062 if (num == 0)
1063 return NULL;
1064
1065 if (lprocfs_no_percpu_stats != 0)
1066 flags |= LPROCFS_STATS_FLAG_NOPERCPU;
1067
1068 if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
1069 num_entry = 1;
1070 else
1071 num_entry = num_possible_cpus();
1072
1073 /* alloc percpu pointers for all possible cpu slots */
1074 LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1075 if (!stats)
1076 return NULL;
1077
1078 stats->ls_num = num;
1079 stats->ls_flags = flags;
1080 spin_lock_init(&stats->ls_lock);
1081
1082 /* alloc num of counter headers */
1083 LIBCFS_ALLOC(stats->ls_cnt_header,
1084 stats->ls_num * sizeof(struct lprocfs_counter_header));
1085 if (!stats->ls_cnt_header)
1086 goto fail;
1087
1088 if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
1089 /* contains only one set counters */
1090 percpusize = lprocfs_stats_counter_size(stats);
1091 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
1092 if (!stats->ls_percpu[0])
1093 goto fail;
1094 stats->ls_biggest_alloc_num = 1;
1095 } else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
1096 /* alloc all percpu data */
1097 for (i = 0; i < num_entry; ++i)
1098 if (lprocfs_stats_alloc_one(stats, i) < 0)
1099 goto fail;
1100 }
1101
1102 return stats;
1103
1104 fail:
1105 lprocfs_free_stats(&stats);
1106 return NULL;
1107 }
1108 EXPORT_SYMBOL(lprocfs_alloc_stats);
1109
1110 void lprocfs_free_stats(struct lprocfs_stats **statsh)
1111 {
1112 struct lprocfs_stats *stats = *statsh;
1113 unsigned int num_entry;
1114 unsigned int percpusize;
1115 unsigned int i;
1116
1117 if (!stats || stats->ls_num == 0)
1118 return;
1119 *statsh = NULL;
1120
1121 if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
1122 num_entry = 1;
1123 else
1124 num_entry = num_possible_cpus();
1125
1126 percpusize = lprocfs_stats_counter_size(stats);
1127 for (i = 0; i < num_entry; i++)
1128 if (stats->ls_percpu[i])
1129 LIBCFS_FREE(stats->ls_percpu[i], percpusize);
1130 if (stats->ls_cnt_header)
1131 LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
1132 sizeof(struct lprocfs_counter_header));
1133 LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1134 }
1135 EXPORT_SYMBOL(lprocfs_free_stats);
1136
1137 void lprocfs_clear_stats(struct lprocfs_stats *stats)
1138 {
1139 struct lprocfs_counter *percpu_cntr;
1140 int i;
1141 int j;
1142 unsigned int num_entry;
1143 unsigned long flags = 0;
1144
1145 num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1146
1147 for (i = 0; i < num_entry; i++) {
1148 if (!stats->ls_percpu[i])
1149 continue;
1150 for (j = 0; j < stats->ls_num; j++) {
1151 percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
1152 percpu_cntr->lc_count = 0;
1153 percpu_cntr->lc_min = LC_MIN_INIT;
1154 percpu_cntr->lc_max = 0;
1155 percpu_cntr->lc_sumsquare = 0;
1156 percpu_cntr->lc_sum = 0;
1157 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1158 percpu_cntr->lc_sum_irq = 0;
1159 }
1160 }
1161
1162 lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1163 }
1164 EXPORT_SYMBOL(lprocfs_clear_stats);
1165
1166 static ssize_t lprocfs_stats_seq_write(struct file *file,
1167 const char __user *buf,
1168 size_t len, loff_t *off)
1169 {
1170 struct seq_file *seq = file->private_data;
1171 struct lprocfs_stats *stats = seq->private;
1172
1173 lprocfs_clear_stats(stats);
1174
1175 return len;
1176 }
1177
1178 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
1179 {
1180 struct lprocfs_stats *stats = p->private;
1181
1182 return (*pos < stats->ls_num) ? pos : NULL;
1183 }
1184
1185 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
1186 {
1187 }
1188
1189 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
1190 {
1191 (*pos)++;
1192 return lprocfs_stats_seq_start(p, pos);
1193 }
1194
1195 /* seq file export of one lprocfs counter */
1196 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
1197 {
1198 struct lprocfs_stats *stats = p->private;
1199 struct lprocfs_counter_header *hdr;
1200 struct lprocfs_counter ctr;
1201 int idx = *(loff_t *)v;
1202
1203 if (idx == 0) {
1204 struct timespec64 now;
1205
1206 ktime_get_real_ts64(&now);
1207 seq_printf(p, "%-25s %llu.%9lu secs.usecs\n",
1208 "snapshot_time",
1209 (s64)now.tv_sec, (unsigned long)now.tv_nsec);
1210 }
1211
1212 hdr = &stats->ls_cnt_header[idx];
1213 lprocfs_stats_collect(stats, idx, &ctr);
1214
1215 if (ctr.lc_count != 0) {
1216 seq_printf(p, "%-25s %lld samples [%s]",
1217 hdr->lc_name, ctr.lc_count, hdr->lc_units);
1218
1219 if ((hdr->lc_config & LPROCFS_CNTR_AVGMINMAX) &&
1220 (ctr.lc_count > 0)) {
1221 seq_printf(p, " %lld %lld %lld",
1222 ctr.lc_min, ctr.lc_max, ctr.lc_sum);
1223 if (hdr->lc_config & LPROCFS_CNTR_STDDEV)
1224 seq_printf(p, " %lld", ctr.lc_sumsquare);
1225 }
1226 seq_putc(p, '\n');
1227 }
1228
1229 return 0;
1230 }
1231
1232 static const struct seq_operations lprocfs_stats_seq_sops = {
1233 .start = lprocfs_stats_seq_start,
1234 .stop = lprocfs_stats_seq_stop,
1235 .next = lprocfs_stats_seq_next,
1236 .show = lprocfs_stats_seq_show,
1237 };
1238
1239 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
1240 {
1241 struct seq_file *seq;
1242 int rc;
1243
1244 rc = seq_open(file, &lprocfs_stats_seq_sops);
1245 if (rc)
1246 return rc;
1247
1248 seq = file->private_data;
1249 seq->private = inode->i_private;
1250
1251 return 0;
1252 }
1253
1254 static const struct file_operations lprocfs_stats_seq_fops = {
1255 .owner = THIS_MODULE,
1256 .open = lprocfs_stats_seq_open,
1257 .read = seq_read,
1258 .write = lprocfs_stats_seq_write,
1259 .llseek = seq_lseek,
1260 .release = lprocfs_seq_release,
1261 };
1262
1263 int ldebugfs_register_stats(struct dentry *parent, const char *name,
1264 struct lprocfs_stats *stats)
1265 {
1266 struct dentry *entry;
1267
1268 LASSERT(!IS_ERR_OR_NULL(parent));
1269
1270 entry = debugfs_create_file(name, 0644, parent, stats,
1271 &lprocfs_stats_seq_fops);
1272 if (IS_ERR_OR_NULL(entry))
1273 return entry ? PTR_ERR(entry) : -ENOMEM;
1274
1275 return 0;
1276 }
1277 EXPORT_SYMBOL_GPL(ldebugfs_register_stats);
1278
1279 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
1280 unsigned conf, const char *name, const char *units)
1281 {
1282 struct lprocfs_counter_header *header;
1283 struct lprocfs_counter *percpu_cntr;
1284 unsigned long flags = 0;
1285 unsigned int i;
1286 unsigned int num_cpu;
1287
1288 header = &stats->ls_cnt_header[index];
1289 LASSERTF(header, "Failed to allocate stats header:[%d]%s/%s\n",
1290 index, name, units);
1291
1292 header->lc_config = conf;
1293 header->lc_name = name;
1294 header->lc_units = units;
1295
1296 num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1297 for (i = 0; i < num_cpu; ++i) {
1298 if (!stats->ls_percpu[i])
1299 continue;
1300 percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
1301 percpu_cntr->lc_count = 0;
1302 percpu_cntr->lc_min = LC_MIN_INIT;
1303 percpu_cntr->lc_max = 0;
1304 percpu_cntr->lc_sumsquare = 0;
1305 percpu_cntr->lc_sum = 0;
1306 if ((stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1307 percpu_cntr->lc_sum_irq = 0;
1308 }
1309 lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1310 }
1311 EXPORT_SYMBOL(lprocfs_counter_init);
1312
1313 int lprocfs_exp_cleanup(struct obd_export *exp)
1314 {
1315 return 0;
1316 }
1317 EXPORT_SYMBOL(lprocfs_exp_cleanup);
1318
1319 __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
1320 struct lprocfs_counter_header *header,
1321 enum lprocfs_stats_flags flags,
1322 enum lprocfs_fields_flags field)
1323 {
1324 __s64 ret = 0;
1325
1326 if (!lc || !header)
1327 return 0;
1328
1329 switch (field) {
1330 case LPROCFS_FIELDS_FLAGS_CONFIG:
1331 ret = header->lc_config;
1332 break;
1333 case LPROCFS_FIELDS_FLAGS_SUM:
1334 ret = lc->lc_sum;
1335 if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1336 ret += lc->lc_sum_irq;
1337 break;
1338 case LPROCFS_FIELDS_FLAGS_MIN:
1339 ret = lc->lc_min;
1340 break;
1341 case LPROCFS_FIELDS_FLAGS_MAX:
1342 ret = lc->lc_max;
1343 break;
1344 case LPROCFS_FIELDS_FLAGS_AVG:
1345 ret = (lc->lc_max - lc->lc_min) / 2;
1346 break;
1347 case LPROCFS_FIELDS_FLAGS_SUMSQUARE:
1348 ret = lc->lc_sumsquare;
1349 break;
1350 case LPROCFS_FIELDS_FLAGS_COUNT:
1351 ret = lc->lc_count;
1352 break;
1353 default:
1354 break;
1355 }
1356
1357 return 0;
1358 }
1359 EXPORT_SYMBOL(lprocfs_read_helper);
1360
1361 int lprocfs_write_helper(const char __user *buffer, unsigned long count,
1362 int *val)
1363 {
1364 return lprocfs_write_frac_helper(buffer, count, val, 1);
1365 }
1366 EXPORT_SYMBOL(lprocfs_write_helper);
1367
1368 int lprocfs_write_u64_helper(const char __user *buffer, unsigned long count,
1369 __u64 *val)
1370 {
1371 return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
1372 }
1373 EXPORT_SYMBOL(lprocfs_write_u64_helper);
1374
1375 int lprocfs_write_frac_u64_helper(const char __user *buffer,
1376 unsigned long count, __u64 *val, int mult)
1377 {
1378 char kernbuf[22], *end, *pbuf;
1379 __u64 whole, frac = 0, units;
1380 unsigned frac_d = 1;
1381 int sign = 1;
1382
1383 if (count > (sizeof(kernbuf) - 1))
1384 return -EINVAL;
1385
1386 if (copy_from_user(kernbuf, buffer, count))
1387 return -EFAULT;
1388
1389 kernbuf[count] = '\0';
1390 pbuf = kernbuf;
1391 if (*pbuf == '-') {
1392 sign = -1;
1393 pbuf++;
1394 }
1395
1396 whole = simple_strtoull(pbuf, &end, 10);
1397 if (pbuf == end)
1398 return -EINVAL;
1399
1400 if (*end == '.') {
1401 int i;
1402
1403 pbuf = end + 1;
1404
1405 /* need to limit frac_d to a __u32 */
1406 if (strlen(pbuf) > 10)
1407 pbuf[10] = '\0';
1408
1409 frac = simple_strtoull(pbuf, &end, 10);
1410 /* count decimal places */
1411 for (i = 0; i < (end - pbuf); i++)
1412 frac_d *= 10;
1413 }
1414
1415 units = 1;
1416 if (end) {
1417 switch (tolower(*end)) {
1418 case 'p':
1419 units <<= 10;
1420 case 't':
1421 units <<= 10;
1422 case 'g':
1423 units <<= 10;
1424 case 'm':
1425 units <<= 10;
1426 case 'k':
1427 units <<= 10;
1428 }
1429 }
1430 /* Specified units override the multiplier */
1431 if (units > 1)
1432 mult = units;
1433
1434 frac *= mult;
1435 do_div(frac, frac_d);
1436 *val = sign * (whole * mult + frac);
1437 return 0;
1438 }
1439 EXPORT_SYMBOL(lprocfs_write_frac_u64_helper);
1440
1441 static char *lprocfs_strnstr(const char *s1, const char *s2, size_t len)
1442 {
1443 size_t l2;
1444
1445 l2 = strlen(s2);
1446 if (!l2)
1447 return (char *)s1;
1448 while (len >= l2) {
1449 len--;
1450 if (!memcmp(s1, s2, l2))
1451 return (char *)s1;
1452 s1++;
1453 }
1454 return NULL;
1455 }
1456
1457 /**
1458 * Find the string \a name in the input \a buffer, and return a pointer to the
1459 * value immediately following \a name, reducing \a count appropriately.
1460 * If \a name is not found the original \a buffer is returned.
1461 */
1462 char *lprocfs_find_named_value(const char *buffer, const char *name,
1463 size_t *count)
1464 {
1465 char *val;
1466 size_t buflen = *count;
1467
1468 /* there is no strnstr() in rhel5 and ubuntu kernels */
1469 val = lprocfs_strnstr(buffer, name, buflen);
1470 if (!val)
1471 return (char *)buffer;
1472
1473 val += strlen(name); /* skip prefix */
1474 while (val < buffer + buflen && isspace(*val)) /* skip separator */
1475 val++;
1476
1477 *count = 0;
1478 while (val < buffer + buflen && isalnum(*val)) {
1479 ++*count;
1480 ++val;
1481 }
1482
1483 return val - *count;
1484 }
1485 EXPORT_SYMBOL(lprocfs_find_named_value);
1486
1487 int ldebugfs_seq_create(struct dentry *parent, const char *name,
1488 umode_t mode, const struct file_operations *seq_fops,
1489 void *data)
1490 {
1491 struct dentry *entry;
1492
1493 /* Disallow secretly (un)writable entries. */
1494 LASSERT((seq_fops->write == NULL) == ((mode & 0222) == 0));
1495
1496 entry = debugfs_create_file(name, mode, parent, data, seq_fops);
1497 if (IS_ERR_OR_NULL(entry))
1498 return entry ? PTR_ERR(entry) : -ENOMEM;
1499
1500 return 0;
1501 }
1502 EXPORT_SYMBOL_GPL(ldebugfs_seq_create);
1503
1504 int ldebugfs_obd_seq_create(struct obd_device *dev,
1505 const char *name,
1506 umode_t mode,
1507 const struct file_operations *seq_fops,
1508 void *data)
1509 {
1510 return ldebugfs_seq_create(dev->obd_debugfs_entry, name,
1511 mode, seq_fops, data);
1512 }
1513 EXPORT_SYMBOL_GPL(ldebugfs_obd_seq_create);
1514
1515 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
1516 {
1517 if (value >= OBD_HIST_MAX)
1518 value = OBD_HIST_MAX - 1;
1519
1520 spin_lock(&oh->oh_lock);
1521 oh->oh_buckets[value]++;
1522 spin_unlock(&oh->oh_lock);
1523 }
1524 EXPORT_SYMBOL(lprocfs_oh_tally);
1525
1526 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
1527 {
1528 unsigned int val = 0;
1529
1530 if (likely(value != 0))
1531 val = min(fls(value - 1), OBD_HIST_MAX);
1532
1533 lprocfs_oh_tally(oh, val);
1534 }
1535 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
1536
1537 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
1538 {
1539 unsigned long ret = 0;
1540 int i;
1541
1542 for (i = 0; i < OBD_HIST_MAX; i++)
1543 ret += oh->oh_buckets[i];
1544 return ret;
1545 }
1546 EXPORT_SYMBOL(lprocfs_oh_sum);
1547
1548 void lprocfs_oh_clear(struct obd_histogram *oh)
1549 {
1550 spin_lock(&oh->oh_lock);
1551 memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
1552 spin_unlock(&oh->oh_lock);
1553 }
1554 EXPORT_SYMBOL(lprocfs_oh_clear);
1555
1556 int lprocfs_wr_root_squash(const char __user *buffer, unsigned long count,
1557 struct root_squash_info *squash, char *name)
1558 {
1559 char kernbuf[64], *tmp, *errmsg;
1560 unsigned long uid, gid;
1561 int rc;
1562
1563 if (count >= sizeof(kernbuf)) {
1564 errmsg = "string too long";
1565 rc = -EINVAL;
1566 goto failed_noprint;
1567 }
1568 if (copy_from_user(kernbuf, buffer, count)) {
1569 errmsg = "bad address";
1570 rc = -EFAULT;
1571 goto failed_noprint;
1572 }
1573 kernbuf[count] = '\0';
1574
1575 /* look for uid gid separator */
1576 tmp = strchr(kernbuf, ':');
1577 if (!tmp) {
1578 errmsg = "needs uid:gid format";
1579 rc = -EINVAL;
1580 goto failed;
1581 }
1582 *tmp = '\0';
1583 tmp++;
1584
1585 /* parse uid */
1586 if (kstrtoul(kernbuf, 0, &uid) != 0) {
1587 errmsg = "bad uid";
1588 rc = -EINVAL;
1589 goto failed;
1590 }
1591 /* parse gid */
1592 if (kstrtoul(tmp, 0, &gid) != 0) {
1593 errmsg = "bad gid";
1594 rc = -EINVAL;
1595 goto failed;
1596 }
1597
1598 squash->rsi_uid = uid;
1599 squash->rsi_gid = gid;
1600
1601 LCONSOLE_INFO("%s: root_squash is set to %u:%u\n",
1602 name, squash->rsi_uid, squash->rsi_gid);
1603 return count;
1604
1605 failed:
1606 if (tmp) {
1607 tmp--;
1608 *tmp = ':';
1609 }
1610 CWARN("%s: failed to set root_squash to \"%s\", %s, rc = %d\n",
1611 name, kernbuf, errmsg, rc);
1612 return rc;
1613 failed_noprint:
1614 CWARN("%s: failed to set root_squash due to %s, rc = %d\n",
1615 name, errmsg, rc);
1616 return rc;
1617 }
1618 EXPORT_SYMBOL(lprocfs_wr_root_squash);
1619
1620 int lprocfs_wr_nosquash_nids(const char __user *buffer, unsigned long count,
1621 struct root_squash_info *squash, char *name)
1622 {
1623 char *kernbuf = NULL, *errmsg;
1624 struct list_head tmp;
1625 int len = count;
1626 int rc;
1627
1628 if (count > 4096) {
1629 errmsg = "string too long";
1630 rc = -EINVAL;
1631 goto failed;
1632 }
1633
1634 kernbuf = kzalloc(count + 1, GFP_NOFS);
1635 if (!kernbuf) {
1636 errmsg = "no memory";
1637 rc = -ENOMEM;
1638 goto failed;
1639 }
1640
1641 if (copy_from_user(kernbuf, buffer, count)) {
1642 errmsg = "bad address";
1643 rc = -EFAULT;
1644 goto failed;
1645 }
1646 kernbuf[count] = '\0';
1647
1648 if (count > 0 && kernbuf[count - 1] == '\n')
1649 len = count - 1;
1650
1651 if ((len == 4 && !strncmp(kernbuf, "NONE", len)) ||
1652 (len == 5 && !strncmp(kernbuf, "clear", len))) {
1653 /* empty string is special case */
1654 down_write(&squash->rsi_sem);
1655 if (!list_empty(&squash->rsi_nosquash_nids))
1656 cfs_free_nidlist(&squash->rsi_nosquash_nids);
1657 up_write(&squash->rsi_sem);
1658 LCONSOLE_INFO("%s: nosquash_nids is cleared\n", name);
1659 kfree(kernbuf);
1660 return count;
1661 }
1662
1663 INIT_LIST_HEAD(&tmp);
1664 if (cfs_parse_nidlist(kernbuf, count, &tmp) <= 0) {
1665 errmsg = "can't parse";
1666 rc = -EINVAL;
1667 goto failed;
1668 }
1669 LCONSOLE_INFO("%s: nosquash_nids set to %s\n",
1670 name, kernbuf);
1671 kfree(kernbuf);
1672 kernbuf = NULL;
1673
1674 down_write(&squash->rsi_sem);
1675 if (!list_empty(&squash->rsi_nosquash_nids))
1676 cfs_free_nidlist(&squash->rsi_nosquash_nids);
1677 list_splice(&tmp, &squash->rsi_nosquash_nids);
1678 up_write(&squash->rsi_sem);
1679
1680 return count;
1681
1682 failed:
1683 if (kernbuf) {
1684 CWARN("%s: failed to set nosquash_nids to \"%s\", %s rc = %d\n",
1685 name, kernbuf, errmsg, rc);
1686 kfree(kernbuf);
1687 kernbuf = NULL;
1688 } else {
1689 CWARN("%s: failed to set nosquash_nids due to %s rc = %d\n",
1690 name, errmsg, rc);
1691 }
1692 return rc;
1693 }
1694 EXPORT_SYMBOL(lprocfs_wr_nosquash_nids);
1695
1696 static ssize_t lustre_attr_show(struct kobject *kobj,
1697 struct attribute *attr, char *buf)
1698 {
1699 struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
1700
1701 return a->show ? a->show(kobj, attr, buf) : 0;
1702 }
1703
1704 static ssize_t lustre_attr_store(struct kobject *kobj, struct attribute *attr,
1705 const char *buf, size_t len)
1706 {
1707 struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
1708
1709 return a->store ? a->store(kobj, attr, buf, len) : len;
1710 }
1711
1712 const struct sysfs_ops lustre_sysfs_ops = {
1713 .show = lustre_attr_show,
1714 .store = lustre_attr_store,
1715 };
1716 EXPORT_SYMBOL_GPL(lustre_sysfs_ops);
Linux kernel - Deliverables
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