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LU-6421 osc: fix bug when setting max_pages_per_rpc
[fs/lustre-release.git] / lustre / osc / lproc_osc.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.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
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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, 2014, 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 #include <linux/version.h>
39 #include <asm/statfs.h>
40 #include <obd_cksum.h>
41 #include <obd_class.h>
42 #include <lprocfs_status.h>
43 #include <linux/seq_file.h>
44 #include "osc_internal.h"
45
46 #ifdef CONFIG_PROC_FS
47 static int osc_active_seq_show(struct seq_file *m, void *v)
48 {
49         struct obd_device *dev = m->private;
50         int rc;
51
52         LPROCFS_CLIMP_CHECK(dev);
53         rc = seq_printf(m, "%d\n", !dev->u.cli.cl_import->imp_deactive);
54         LPROCFS_CLIMP_EXIT(dev);
55         return rc;
56 }
57
58 static ssize_t osc_active_seq_write(struct file *file,
59                                     const char __user *buffer,
60                                     size_t count, loff_t *off)
61 {
62         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
63         int val, rc;
64
65         rc = lprocfs_write_helper(buffer, count, &val);
66         if (rc)
67                 return rc;
68         if (val < 0 || val > 1)
69                 return -ERANGE;
70
71         /* opposite senses */
72         if (dev->u.cli.cl_import->imp_deactive == val)
73                 rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
74         else
75                 CDEBUG(D_CONFIG, "activate %d: ignoring repeat request\n", val);
76
77         return count;
78 }
79 LPROC_SEQ_FOPS(osc_active);
80
81 static int osc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v)
82 {
83         struct obd_device *dev = m->private;
84         struct client_obd *cli = &dev->u.cli;
85         int rc;
86
87         spin_lock(&cli->cl_loi_list_lock);
88         rc = seq_printf(m, "%u\n", cli->cl_max_rpcs_in_flight);
89         spin_unlock(&cli->cl_loi_list_lock);
90         return rc;
91 }
92
93 static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file,
94                                                 const char __user *buffer,
95                                                 size_t count, loff_t *off)
96 {
97         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
98         struct client_obd *cli = &dev->u.cli;
99         struct ptlrpc_request_pool *pool = cli->cl_import->imp_rq_pool;
100         int val, rc;
101
102         rc = lprocfs_write_helper(buffer, count, &val);
103         if (rc)
104                 return rc;
105
106         if (val < 1 || val > OSC_MAX_RIF_MAX)
107                 return -ERANGE;
108
109         LPROCFS_CLIMP_CHECK(dev);
110         if (pool && val > cli->cl_max_rpcs_in_flight)
111                 pool->prp_populate(pool, val-cli->cl_max_rpcs_in_flight);
112
113         spin_lock(&cli->cl_loi_list_lock);
114         cli->cl_max_rpcs_in_flight = val;
115         client_adjust_max_dirty(cli);
116         spin_unlock(&cli->cl_loi_list_lock);
117
118         LPROCFS_CLIMP_EXIT(dev);
119         return count;
120 }
121 LPROC_SEQ_FOPS(osc_max_rpcs_in_flight);
122
123 static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
124 {
125         struct obd_device *dev = m->private;
126         struct client_obd *cli = &dev->u.cli;
127         long val;
128         int mult;
129
130         spin_lock(&cli->cl_loi_list_lock);
131         val = cli->cl_dirty_max_pages;
132         spin_unlock(&cli->cl_loi_list_lock);
133
134         mult = 1 << (20 - PAGE_CACHE_SHIFT);
135         return lprocfs_seq_read_frac_helper(m, val, mult);
136 }
137
138 static ssize_t osc_max_dirty_mb_seq_write(struct file *file,
139                                           const char __user *buffer,
140                                           size_t count, loff_t *off)
141 {
142         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
143         struct client_obd *cli = &dev->u.cli;
144         int pages_number, mult, rc;
145
146         mult = 1 << (20 - PAGE_CACHE_SHIFT);
147         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
148         if (rc)
149                 return rc;
150
151         if (pages_number <= 0 ||
152             pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_CACHE_SHIFT) ||
153             pages_number > totalram_pages / 4) /* 1/4 of RAM */
154                 return -ERANGE;
155
156         spin_lock(&cli->cl_loi_list_lock);
157         cli->cl_dirty_max_pages = pages_number;
158         osc_wake_cache_waiters(cli);
159         spin_unlock(&cli->cl_loi_list_lock);
160
161         return count;
162 }
163 LPROC_SEQ_FOPS(osc_max_dirty_mb);
164
165 static int osc_cached_mb_seq_show(struct seq_file *m, void *v)
166 {
167         struct obd_device *dev = m->private;
168         struct client_obd *cli = &dev->u.cli;
169         int shift = 20 - PAGE_CACHE_SHIFT;
170         int rc;
171
172         rc = seq_printf(m,
173                       "used_mb: %ld\n"
174                       "busy_cnt: %ld\n",
175                       (atomic_long_read(&cli->cl_lru_in_list) +
176                         atomic_long_read(&cli->cl_lru_busy)) >> shift,
177                       atomic_long_read(&cli->cl_lru_busy));
178
179         return rc;
180 }
181
182 /* shrink the number of caching pages to a specific number */
183 static ssize_t
184 osc_cached_mb_seq_write(struct file *file, const char __user *buffer,
185                         size_t count, loff_t *off)
186 {
187         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
188         struct client_obd *cli = &dev->u.cli;
189         __u64 val;
190         long pages_number;
191         long rc;
192         int mult;
193         char kernbuf[128];
194
195         if (count >= sizeof(kernbuf))
196                 return -EINVAL;
197
198         if (copy_from_user(kernbuf, buffer, count))
199                 return -EFAULT;
200         kernbuf[count] = 0;
201
202         mult = 1 << (20 - PAGE_CACHE_SHIFT);
203         buffer += lprocfs_find_named_value(kernbuf, "used_mb:", &count) -
204                   kernbuf;
205         rc = lprocfs_write_frac_u64_helper(buffer, count, &val, mult);
206
207         if (rc)
208                 return rc;
209
210         if (val > LONG_MAX)
211                 return -ERANGE;
212         pages_number = (long)val;
213
214         if (pages_number < 0)
215                 return -ERANGE;
216
217         rc = atomic_long_read(&cli->cl_lru_in_list) - pages_number;
218         if (rc > 0) {
219                 struct lu_env *env;
220                 int refcheck;
221
222                 env = cl_env_get(&refcheck);
223                 if (!IS_ERR(env)) {
224                         (void)osc_lru_shrink(env, cli, rc, true);
225                         cl_env_put(env, &refcheck);
226                 }
227         }
228
229         return count;
230 }
231 LPROC_SEQ_FOPS(osc_cached_mb);
232
233 static int osc_cur_dirty_bytes_seq_show(struct seq_file *m, void *v)
234 {
235         struct obd_device *dev = m->private;
236         struct client_obd *cli = &dev->u.cli;
237         int rc;
238
239         spin_lock(&cli->cl_loi_list_lock);
240         rc = seq_printf(m, "%lu\n", cli->cl_dirty_pages << PAGE_CACHE_SHIFT);
241         spin_unlock(&cli->cl_loi_list_lock);
242         return rc;
243 }
244 LPROC_SEQ_FOPS_RO(osc_cur_dirty_bytes);
245
246 static int osc_cur_grant_bytes_seq_show(struct seq_file *m, void *v)
247 {
248         struct obd_device *dev = m->private;
249         struct client_obd *cli = &dev->u.cli;
250         int rc;
251
252         spin_lock(&cli->cl_loi_list_lock);
253         rc = seq_printf(m, "%lu\n", cli->cl_avail_grant);
254         spin_unlock(&cli->cl_loi_list_lock);
255         return rc;
256 }
257
258 static ssize_t osc_cur_grant_bytes_seq_write(struct file *file,
259                                              const char __user *buffer,
260                                              size_t count, loff_t *off)
261 {
262         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
263         struct client_obd *cli = &obd->u.cli;
264         int                rc;
265         __u64              val;
266
267         if (obd == NULL)
268                 return 0;
269
270         rc = lprocfs_write_u64_helper(buffer, count, &val);
271         if (rc)
272                 return rc;
273
274         /* this is only for shrinking grant */
275         spin_lock(&cli->cl_loi_list_lock);
276         if (val >= cli->cl_avail_grant) {
277                 spin_unlock(&cli->cl_loi_list_lock);
278                 return 0;
279         }
280
281         spin_unlock(&cli->cl_loi_list_lock);
282
283         LPROCFS_CLIMP_CHECK(obd);
284         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
285                 rc = osc_shrink_grant_to_target(cli, val);
286         LPROCFS_CLIMP_EXIT(obd);
287         if (rc)
288                 return rc;
289         return count;
290 }
291 LPROC_SEQ_FOPS(osc_cur_grant_bytes);
292
293 static int osc_cur_lost_grant_bytes_seq_show(struct seq_file *m, void *v)
294 {
295         struct obd_device *dev = m->private;
296         struct client_obd *cli = &dev->u.cli;
297         int rc;
298
299         spin_lock(&cli->cl_loi_list_lock);
300         rc = seq_printf(m, "%lu\n", cli->cl_lost_grant);
301         spin_unlock(&cli->cl_loi_list_lock);
302         return rc;
303 }
304 LPROC_SEQ_FOPS_RO(osc_cur_lost_grant_bytes);
305
306 static int osc_grant_shrink_interval_seq_show(struct seq_file *m, void *v)
307 {
308         struct obd_device *obd = m->private;
309
310         if (obd == NULL)
311                 return 0;
312         return seq_printf(m, "%d\n",
313                           obd->u.cli.cl_grant_shrink_interval);
314 }
315
316 static ssize_t osc_grant_shrink_interval_seq_write(struct file *file,
317                                                    const char __user *buffer,
318                                                    size_t count, loff_t *off)
319 {
320         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
321         int val, rc;
322
323         if (obd == NULL)
324                 return 0;
325
326         rc = lprocfs_write_helper(buffer, count, &val);
327         if (rc)
328                 return rc;
329
330         if (val <= 0)
331                 return -ERANGE;
332
333         obd->u.cli.cl_grant_shrink_interval = val;
334
335         return count;
336 }
337 LPROC_SEQ_FOPS(osc_grant_shrink_interval);
338
339 static int osc_checksum_seq_show(struct seq_file *m, void *v)
340 {
341         struct obd_device *obd = m->private;
342
343         if (obd == NULL)
344                 return 0;
345
346         return seq_printf(m, "%d\n",
347                           obd->u.cli.cl_checksum ? 1 : 0);
348 }
349
350 static ssize_t osc_checksum_seq_write(struct file *file,
351                                       const char __user *buffer,
352                                       size_t count, loff_t *off)
353 {
354         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
355         int val, rc;
356
357         if (obd == NULL)
358                 return 0;
359
360         rc = lprocfs_write_helper(buffer, count, &val);
361         if (rc)
362                 return rc;
363
364         obd->u.cli.cl_checksum = (val ? 1 : 0);
365
366         return count;
367 }
368 LPROC_SEQ_FOPS(osc_checksum);
369
370 static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
371 {
372         struct obd_device *obd = m->private;
373         int i;
374         DECLARE_CKSUM_NAME;
375
376         if (obd == NULL)
377                 return 0;
378
379         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
380                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
381                         continue;
382                 if (obd->u.cli.cl_cksum_type == (1 << i))
383                         seq_printf(m, "[%s] ", cksum_name[i]);
384                 else
385                         seq_printf(m, "%s ", cksum_name[i]);
386         }
387         seq_printf(m, "\n");
388         return 0;
389 }
390
391 static ssize_t osc_checksum_type_seq_write(struct file *file,
392                                            const char __user *buffer,
393                                            size_t count, loff_t *off)
394 {
395         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
396         int i;
397         DECLARE_CKSUM_NAME;
398         char kernbuf[10];
399
400         if (obd == NULL)
401                 return 0;
402
403         if (count > sizeof(kernbuf) - 1)
404                 return -EINVAL;
405         if (copy_from_user(kernbuf, buffer, count))
406                 return -EFAULT;
407         if (count > 0 && kernbuf[count - 1] == '\n')
408                 kernbuf[count - 1] = '\0';
409         else
410                 kernbuf[count] = '\0';
411
412         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
413                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
414                         continue;
415                 if (!strcmp(kernbuf, cksum_name[i])) {
416                        obd->u.cli.cl_cksum_type = 1 << i;
417                        return count;
418                 }
419         }
420         return -EINVAL;
421 }
422 LPROC_SEQ_FOPS(osc_checksum_type);
423
424 static int osc_resend_count_seq_show(struct seq_file *m, void *v)
425 {
426         struct obd_device *obd = m->private;
427
428         return seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_resends));
429 }
430
431 static ssize_t osc_resend_count_seq_write(struct file *file,
432                                           const char __user *buffer,
433                                           size_t count, loff_t *off)
434 {
435         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
436         int val, rc;
437
438         rc = lprocfs_write_helper(buffer, count, &val);
439         if (rc)
440                 return rc;
441
442         if (val < 0)
443                 return -EINVAL;
444
445         atomic_set(&obd->u.cli.cl_resends, val);
446
447         return count;
448 }
449 LPROC_SEQ_FOPS(osc_resend_count);
450
451 static int osc_contention_seconds_seq_show(struct seq_file *m, void *v)
452 {
453         struct obd_device *obd = m->private;
454         struct osc_device *od  = obd2osc_dev(obd);
455
456         return seq_printf(m, "%u\n", od->od_contention_time);
457 }
458
459 static ssize_t osc_contention_seconds_seq_write(struct file *file,
460                                                 const char __user *buffer,
461                                                 size_t count, loff_t *off)
462 {
463         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
464         struct osc_device *od  = obd2osc_dev(obd);
465
466         return lprocfs_write_helper(buffer, count, &od->od_contention_time) ?: count;
467 }
468 LPROC_SEQ_FOPS(osc_contention_seconds);
469
470 static int osc_lockless_truncate_seq_show(struct seq_file *m, void *v)
471 {
472         struct obd_device *obd = m->private;
473         struct osc_device *od  = obd2osc_dev(obd);
474
475         return seq_printf(m, "%u\n", od->od_lockless_truncate);
476 }
477
478 static ssize_t osc_lockless_truncate_seq_write(struct file *file,
479                                                const char __user *buffer,
480                                     size_t count, loff_t *off)
481 {
482         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
483         struct osc_device *od  = obd2osc_dev(obd);
484
485         return lprocfs_write_helper(buffer, count, &od->od_lockless_truncate) ?:
486                 count;
487 }
488 LPROC_SEQ_FOPS(osc_lockless_truncate);
489
490 static int osc_destroys_in_flight_seq_show(struct seq_file *m, void *v)
491 {
492         struct obd_device *obd = m->private;
493         return seq_printf(m, "%u\n",
494                           atomic_read(&obd->u.cli.cl_destroy_in_flight));
495 }
496 LPROC_SEQ_FOPS_RO(osc_destroys_in_flight);
497
498 static int osc_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *v)
499 {
500         return lprocfs_obd_max_pages_per_rpc_seq_show(m, m->private);
501 }
502
503 static ssize_t osc_obd_max_pages_per_rpc_seq_write(struct file *file,
504                                                    const char __user *buffer,
505                                                    size_t count, loff_t *off)
506 {
507         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
508         struct client_obd *cli = &dev->u.cli;
509         struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
510         int chunk_mask, rc;
511         __u64 val;
512
513         rc = lprocfs_write_u64_helper(buffer, count, &val);
514         if (rc)
515                 return rc;
516
517         /* if the max_pages is specified in bytes, convert to pages */
518         if (val >= ONE_MB_BRW_SIZE)
519                 val >>= PAGE_CACHE_SHIFT;
520
521         LPROCFS_CLIMP_CHECK(dev);
522
523         chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_CACHE_SHIFT)) - 1);
524         /* max_pages_per_rpc must be chunk aligned */
525         val = (val + ~chunk_mask) & chunk_mask;
526         if (val == 0 || (ocd->ocd_brw_size != 0 &&
527                          val > ocd->ocd_brw_size >> PAGE_CACHE_SHIFT)) {
528                 LPROCFS_CLIMP_EXIT(dev);
529                 return -ERANGE;
530         }
531         spin_lock(&cli->cl_loi_list_lock);
532         cli->cl_max_pages_per_rpc = val;
533         client_adjust_max_dirty(cli);
534         spin_unlock(&cli->cl_loi_list_lock);
535
536         LPROCFS_CLIMP_EXIT(dev);
537         return count;
538 }
539 LPROC_SEQ_FOPS(osc_obd_max_pages_per_rpc);
540
541 static int osc_unstable_stats_seq_show(struct seq_file *m, void *v)
542 {
543         struct obd_device *dev = m->private;
544         struct client_obd *cli = &dev->u.cli;
545         long pages;
546         int mb;
547
548         pages = atomic_long_read(&cli->cl_unstable_count);
549         mb    = (pages * PAGE_CACHE_SIZE) >> 20;
550
551         return seq_printf(m, "unstable_pages: %20ld\n"
552                           "unstable_mb:              %10d\n",
553                         pages, mb);
554 }
555 LPROC_SEQ_FOPS_RO(osc_unstable_stats);
556
557 LPROC_SEQ_FOPS_RO_TYPE(osc, uuid);
558 LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
559 LPROC_SEQ_FOPS_RO_TYPE(osc, blksize);
560 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytestotal);
561 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytesfree);
562 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytesavail);
563 LPROC_SEQ_FOPS_RO_TYPE(osc, filestotal);
564 LPROC_SEQ_FOPS_RO_TYPE(osc, filesfree);
565 LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid);
566 LPROC_SEQ_FOPS_RO_TYPE(osc, conn_uuid);
567 LPROC_SEQ_FOPS_RO_TYPE(osc, timeouts);
568 LPROC_SEQ_FOPS_RO_TYPE(osc, state);
569
570 LPROC_SEQ_FOPS_WO_TYPE(osc, ping);
571
572 LPROC_SEQ_FOPS_RW_TYPE(osc, import);
573 LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov);
574
575 struct lprocfs_vars lprocfs_osc_obd_vars[] = {
576         { .name =       "uuid",
577           .fops =       &osc_uuid_fops                  },
578         { .name =       "ping",
579           .fops =       &osc_ping_fops,
580           .proc_mode =  0222                            },
581         { .name =       "connect_flags",
582           .fops =       &osc_connect_flags_fops         },
583         { .name =       "blocksize",
584           .fops =       &osc_blksize_fops               },
585         { .name =       "kbytestotal",
586           .fops =       &osc_kbytestotal_fops           },
587         { .name =       "kbytesfree",
588           .fops =       &osc_kbytesfree_fops            },
589         { .name =       "kbytesavail",
590           .fops =       &osc_kbytesavail_fops           },
591         { .name =       "filestotal",
592           .fops =       &osc_filestotal_fops            },
593         { .name =       "filesfree",
594           .fops =       &osc_filesfree_fops             },
595         { .name =       "ost_server_uuid",
596           .fops =       &osc_server_uuid_fops           },
597         { .name =       "ost_conn_uuid",
598           .fops =       &osc_conn_uuid_fops             },
599         { .name =       "active",
600           .fops =       &osc_active_fops                },
601         { .name =       "max_pages_per_rpc",
602           .fops =       &osc_obd_max_pages_per_rpc_fops },
603         { .name =       "max_rpcs_in_flight",
604           .fops =       &osc_max_rpcs_in_flight_fops    },
605         { .name =       "destroys_in_flight",
606           .fops =       &osc_destroys_in_flight_fops    },
607         { .name =       "max_dirty_mb",
608           .fops =       &osc_max_dirty_mb_fops          },
609         { .name =       "osc_cached_mb",
610           .fops =       &osc_cached_mb_fops             },
611         { .name =       "cur_dirty_bytes",
612           .fops =       &osc_cur_dirty_bytes_fops       },
613         { .name =       "cur_grant_bytes",
614           .fops =       &osc_cur_grant_bytes_fops       },
615         { .name =       "cur_lost_grant_bytes",
616           .fops =       &osc_cur_lost_grant_bytes_fops  },
617         { .name =       "grant_shrink_interval",
618           .fops =       &osc_grant_shrink_interval_fops },
619         { .name =       "checksums",
620           .fops =       &osc_checksum_fops              },
621         { .name =       "checksum_type",
622           .fops =       &osc_checksum_type_fops         },
623         { .name =       "resend_count",
624           .fops =       &osc_resend_count_fops          },
625         { .name =       "timeouts",
626           .fops =       &osc_timeouts_fops              },
627         { .name =       "contention_seconds",
628           .fops =       &osc_contention_seconds_fops    },
629         { .name =       "lockless_truncate",
630           .fops =       &osc_lockless_truncate_fops     },
631         { .name =       "import",
632           .fops =       &osc_import_fops                },
633         { .name =       "state",
634           .fops =       &osc_state_fops                 },
635         { .name =       "pinger_recov",
636           .fops =       &osc_pinger_recov_fops          },
637         { .name =       "unstable_stats",
638           .fops =       &osc_unstable_stats_fops        },
639         { NULL }
640 };
641
642 #define pct(a,b) (b ? a * 100 / b : 0)
643
644 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
645 {
646         struct timeval now;
647         struct obd_device *dev = seq->private;
648         struct client_obd *cli = &dev->u.cli;
649         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
650         int i;
651
652         do_gettimeofday(&now);
653
654         spin_lock(&cli->cl_loi_list_lock);
655
656         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
657                    now.tv_sec, now.tv_usec);
658         seq_printf(seq, "read RPCs in flight:  %d\n",
659                    cli->cl_r_in_flight);
660         seq_printf(seq, "write RPCs in flight: %d\n",
661                    cli->cl_w_in_flight);
662         seq_printf(seq, "pending write pages:  %d\n",
663                    atomic_read(&cli->cl_pending_w_pages));
664         seq_printf(seq, "pending read pages:   %d\n",
665                    atomic_read(&cli->cl_pending_r_pages));
666
667         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
668         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
669         seq_printf(seq, "       rpcs   %% cum %%\n");
670
671         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
672         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
673
674         read_cum = 0;
675         write_cum = 0;
676         for (i = 0; i < OBD_HIST_MAX; i++) {
677                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
678                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
679
680                 read_cum += r;
681                 write_cum += w;
682                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
683                            1 << i, r, pct(r, read_tot),
684                            pct(read_cum, read_tot), w,
685                            pct(w, write_tot),
686                            pct(write_cum, write_tot));
687                 if (read_cum == read_tot && write_cum == write_tot)
688                         break;
689         }
690
691         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
692         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
693         seq_printf(seq, "       rpcs   %% cum %%\n");
694
695         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
696         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
697
698         read_cum = 0;
699         write_cum = 0;
700         for (i = 0; i < OBD_HIST_MAX; i++) {
701                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
702                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
703                 read_cum += r;
704                 write_cum += w;
705                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
706                                  i, r, pct(r, read_tot),
707                                  pct(read_cum, read_tot), w,
708                                  pct(w, write_tot),
709                                  pct(write_cum, write_tot));
710                 if (read_cum == read_tot && write_cum == write_tot)
711                         break;
712         }
713
714         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
715         seq_printf(seq, "offset                rpcs   %% cum %% |");
716         seq_printf(seq, "       rpcs   %% cum %%\n");
717
718         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
719         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
720
721         read_cum = 0;
722         write_cum = 0;
723         for (i = 0; i < OBD_HIST_MAX; i++) {
724                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
725                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
726                 read_cum += r;
727                 write_cum += w;
728                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
729                            (i == 0) ? 0 : 1 << (i - 1),
730                            r, pct(r, read_tot), pct(read_cum, read_tot),
731                            w, pct(w, write_tot), pct(write_cum, write_tot));
732                 if (read_cum == read_tot && write_cum == write_tot)
733                         break;
734         }
735
736         spin_unlock(&cli->cl_loi_list_lock);
737
738         return 0;
739 }
740 #undef pct
741
742 static ssize_t osc_rpc_stats_seq_write(struct file *file,
743                                        const char __user *buf,
744                                        size_t len, loff_t *off)
745 {
746         struct seq_file *seq = file->private_data;
747         struct obd_device *dev = seq->private;
748         struct client_obd *cli = &dev->u.cli;
749
750         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
751         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
752         lprocfs_oh_clear(&cli->cl_read_page_hist);
753         lprocfs_oh_clear(&cli->cl_write_page_hist);
754         lprocfs_oh_clear(&cli->cl_read_offset_hist);
755         lprocfs_oh_clear(&cli->cl_write_offset_hist);
756
757         return len;
758 }
759 LPROC_SEQ_FOPS(osc_rpc_stats);
760
761 static int osc_stats_seq_show(struct seq_file *seq, void *v)
762 {
763         struct timeval now;
764         struct obd_device *dev = seq->private;
765         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
766
767         do_gettimeofday(&now);
768
769         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
770                    now.tv_sec, now.tv_usec);
771         seq_printf(seq, "lockless_write_bytes\t\t"LPU64"\n",
772                    stats->os_lockless_writes);
773         seq_printf(seq, "lockless_read_bytes\t\t"LPU64"\n",
774                    stats->os_lockless_reads);
775         seq_printf(seq, "lockless_truncate\t\t"LPU64"\n",
776                    stats->os_lockless_truncates);
777         return 0;
778 }
779
780 static ssize_t osc_stats_seq_write(struct file *file,
781                                    const char __user *buf,
782                                    size_t len, loff_t *off)
783 {
784         struct seq_file *seq = file->private_data;
785         struct obd_device *dev = seq->private;
786         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
787
788         memset(stats, 0, sizeof(*stats));
789         return len;
790 }
791
792 LPROC_SEQ_FOPS(osc_stats);
793
794 int lproc_osc_attach_seqstat(struct obd_device *dev)
795 {
796         int rc;
797
798         rc = lprocfs_seq_create(dev->obd_proc_entry, "osc_stats", 0644,
799                                 &osc_stats_fops, dev);
800         if (rc == 0)
801                 rc = lprocfs_obd_seq_create(dev, "rpc_stats", 0644,
802                                             &osc_rpc_stats_fops, dev);
803
804         return rc;
805 }
806 #endif /* CONFIG_PROC_FS */