2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License v.2.
10 #include <linux/sched.h>
11 #include <linux/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/module.h>
16 #include <linux/kobject.h>
17 #include <asm/semaphore.h>
18 #include <asm/uaccess.h>
28 spinlock_t gfs2_sys_margs_lock;
30 static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
32 return sprintf(buf, "%s\n", sdp->sd_vfs->s_id);
35 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
37 return sprintf(buf, "%s\n", sdp->sd_fsname);
40 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
44 mutex_lock(&sdp->sd_freeze_lock);
45 count = sdp->sd_freeze_count;
46 mutex_unlock(&sdp->sd_freeze_lock);
48 return sprintf(buf, "%u\n", count);
51 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
55 int n = simple_strtol(buf, NULL, 0);
57 if (!capable(CAP_SYS_ADMIN))
62 gfs2_unfreeze_fs(sdp);
65 error = gfs2_freeze_fs(sdp);
72 fs_warn(sdp, "freeze %d error %d", n, error);
77 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
79 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
80 return sprintf(buf, "%u\n", b);
83 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
85 if (!capable(CAP_SYS_ADMIN))
88 if (simple_strtol(buf, NULL, 0) != 1)
92 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
97 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
100 if (!capable(CAP_SYS_ADMIN))
103 if (simple_strtol(buf, NULL, 0) != 1)
106 gfs2_statfs_sync(sdp);
110 static ssize_t shrink_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
112 if (!capable(CAP_SYS_ADMIN))
115 if (simple_strtol(buf, NULL, 0) != 1)
118 gfs2_gl_hash_clear(sdp, NO_WAIT);
122 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
125 if (!capable(CAP_SYS_ADMIN))
128 if (simple_strtol(buf, NULL, 0) != 1)
131 gfs2_quota_sync(sdp);
135 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
140 if (!capable(CAP_SYS_ADMIN))
143 id = simple_strtoul(buf, NULL, 0);
145 gfs2_quota_refresh(sdp, 1, id);
149 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
154 if (!capable(CAP_SYS_ADMIN))
157 id = simple_strtoul(buf, NULL, 0);
159 gfs2_quota_refresh(sdp, 0, id);
164 struct attribute attr;
165 ssize_t (*show)(struct gfs2_sbd *, char *);
166 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
169 #define GFS2_ATTR(name, mode, show, store) \
170 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
172 GFS2_ATTR(id, 0444, id_show, NULL);
173 GFS2_ATTR(fsname, 0444, fsname_show, NULL);
174 GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
175 GFS2_ATTR(shrink, 0200, NULL, shrink_store);
176 GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
177 GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
178 GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
179 GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
180 GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
182 static struct attribute *gfs2_attrs[] = {
184 &gfs2_attr_fsname.attr,
185 &gfs2_attr_freeze.attr,
186 &gfs2_attr_shrink.attr,
187 &gfs2_attr_withdraw.attr,
188 &gfs2_attr_statfs_sync.attr,
189 &gfs2_attr_quota_sync.attr,
190 &gfs2_attr_quota_refresh_user.attr,
191 &gfs2_attr_quota_refresh_group.attr,
195 static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
198 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
199 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
200 return a->show ? a->show(sdp, buf) : 0;
203 static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
204 const char *buf, size_t len)
206 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
207 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
208 return a->store ? a->store(sdp, buf, len) : len;
211 static struct sysfs_ops gfs2_attr_ops = {
212 .show = gfs2_attr_show,
213 .store = gfs2_attr_store,
216 static struct kobj_type gfs2_ktype = {
217 .default_attrs = gfs2_attrs,
218 .sysfs_ops = &gfs2_attr_ops,
221 static struct kset gfs2_kset = {
222 .subsys = &fs_subsys,
223 .kobj = {.name = "gfs2",},
224 .ktype = &gfs2_ktype,
228 * display struct lm_lockstruct fields
231 struct lockstruct_attr {
232 struct attribute attr;
233 ssize_t (*show)(struct gfs2_sbd *, char *);
236 #define LOCKSTRUCT_ATTR(name, fmt) \
237 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
239 return sprintf(buf, fmt, sdp->sd_lockstruct.ls_##name); \
241 static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
243 LOCKSTRUCT_ATTR(jid, "%u\n");
244 LOCKSTRUCT_ATTR(first, "%u\n");
245 LOCKSTRUCT_ATTR(lvb_size, "%u\n");
246 LOCKSTRUCT_ATTR(flags, "%d\n");
248 static struct attribute *lockstruct_attrs[] = {
249 &lockstruct_attr_jid.attr,
250 &lockstruct_attr_first.attr,
251 &lockstruct_attr_lvb_size.attr,
252 &lockstruct_attr_flags.attr,
257 * display struct gfs2_args fields
261 struct attribute attr;
262 ssize_t (*show)(struct gfs2_sbd *, char *);
265 #define ARGS_ATTR(name, fmt) \
266 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
268 return sprintf(buf, fmt, sdp->sd_args.ar_##name); \
270 static struct args_attr args_attr_##name = __ATTR_RO(name)
272 ARGS_ATTR(lockproto, "%s\n");
273 ARGS_ATTR(locktable, "%s\n");
274 ARGS_ATTR(hostdata, "%s\n");
275 ARGS_ATTR(spectator, "%d\n");
276 ARGS_ATTR(ignore_local_fs, "%d\n");
277 ARGS_ATTR(localcaching, "%d\n");
278 ARGS_ATTR(localflocks, "%d\n");
279 ARGS_ATTR(debug, "%d\n");
280 ARGS_ATTR(upgrade, "%d\n");
281 ARGS_ATTR(num_glockd, "%u\n");
282 ARGS_ATTR(posix_acl, "%d\n");
283 ARGS_ATTR(quota, "%u\n");
284 ARGS_ATTR(suiddir, "%d\n");
285 ARGS_ATTR(data, "%d\n");
287 /* one oddball doesn't fit the macro mold */
288 static ssize_t noatime_show(struct gfs2_sbd *sdp, char *buf)
290 return sprintf(buf, "%d\n", !!test_bit(SDF_NOATIME, &sdp->sd_flags));
292 static struct args_attr args_attr_noatime = __ATTR_RO(noatime);
294 static struct attribute *args_attrs[] = {
295 &args_attr_lockproto.attr,
296 &args_attr_locktable.attr,
297 &args_attr_hostdata.attr,
298 &args_attr_spectator.attr,
299 &args_attr_ignore_local_fs.attr,
300 &args_attr_localcaching.attr,
301 &args_attr_localflocks.attr,
302 &args_attr_debug.attr,
303 &args_attr_upgrade.attr,
304 &args_attr_num_glockd.attr,
305 &args_attr_posix_acl.attr,
306 &args_attr_quota.attr,
307 &args_attr_suiddir.attr,
308 &args_attr_data.attr,
309 &args_attr_noatime.attr,
314 * display counters from superblock
317 struct counters_attr {
318 struct attribute attr;
319 ssize_t (*show)(struct gfs2_sbd *, char *);
322 #define COUNTERS_ATTR_GENERAL(name, fmt, val) \
323 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
325 return sprintf(buf, fmt, val); \
327 static struct counters_attr counters_attr_##name = __ATTR_RO(name)
329 #define COUNTERS_ATTR_SIMPLE(name, fmt) \
330 COUNTERS_ATTR_GENERAL(name, fmt, sdp->sd_##name)
332 #define COUNTERS_ATTR_ATOMIC(name, fmt) \
333 COUNTERS_ATTR_GENERAL(name, fmt, (unsigned int)atomic_read(&sdp->sd_##name))
335 COUNTERS_ATTR_ATOMIC(glock_count, "%u\n");
336 COUNTERS_ATTR_ATOMIC(glock_held_count, "%u\n");
337 COUNTERS_ATTR_ATOMIC(inode_count, "%u\n");
338 COUNTERS_ATTR_ATOMIC(bufdata_count, "%u\n");
339 COUNTERS_ATTR_ATOMIC(unlinked_count, "%u\n");
340 COUNTERS_ATTR_ATOMIC(quota_count, "%u\n");
341 COUNTERS_ATTR_SIMPLE(log_num_gl, "%u\n");
342 COUNTERS_ATTR_SIMPLE(log_num_buf, "%u\n");
343 COUNTERS_ATTR_SIMPLE(log_num_revoke, "%u\n");
344 COUNTERS_ATTR_SIMPLE(log_num_rg, "%u\n");
345 COUNTERS_ATTR_SIMPLE(log_num_databuf, "%u\n");
346 COUNTERS_ATTR_SIMPLE(log_blks_free, "%u\n");
347 COUNTERS_ATTR_GENERAL(jd_blocks, "%u\n", sdp->sd_jdesc->jd_blocks);
348 COUNTERS_ATTR_ATOMIC(reclaim_count, "%u\n");
349 COUNTERS_ATTR_SIMPLE(log_wraps, "%llu\n");
350 COUNTERS_ATTR_ATOMIC(fh2dentry_misses, "%u\n");
351 COUNTERS_ATTR_ATOMIC(reclaimed, "%u\n");
352 COUNTERS_ATTR_ATOMIC(log_flush_incore, "%u\n");
353 COUNTERS_ATTR_ATOMIC(log_flush_ondisk, "%u\n");
354 COUNTERS_ATTR_ATOMIC(glock_nq_calls, "%u\n");
355 COUNTERS_ATTR_ATOMIC(glock_dq_calls, "%u\n");
356 COUNTERS_ATTR_ATOMIC(glock_prefetch_calls, "%u\n");
357 COUNTERS_ATTR_ATOMIC(lm_lock_calls, "%u\n");
358 COUNTERS_ATTR_ATOMIC(lm_unlock_calls, "%u\n");
359 COUNTERS_ATTR_ATOMIC(lm_callbacks, "%u\n");
360 COUNTERS_ATTR_ATOMIC(ops_address, "%u\n");
361 COUNTERS_ATTR_ATOMIC(ops_dentry, "%u\n");
362 COUNTERS_ATTR_ATOMIC(ops_export, "%u\n");
363 COUNTERS_ATTR_ATOMIC(ops_file, "%u\n");
364 COUNTERS_ATTR_ATOMIC(ops_inode, "%u\n");
365 COUNTERS_ATTR_ATOMIC(ops_super, "%u\n");
366 COUNTERS_ATTR_ATOMIC(ops_vm, "%u\n");
368 static struct attribute *counters_attrs[] = {
369 &counters_attr_glock_count.attr,
370 &counters_attr_glock_held_count.attr,
371 &counters_attr_inode_count.attr,
372 &counters_attr_bufdata_count.attr,
373 &counters_attr_unlinked_count.attr,
374 &counters_attr_quota_count.attr,
375 &counters_attr_log_num_gl.attr,
376 &counters_attr_log_num_buf.attr,
377 &counters_attr_log_num_revoke.attr,
378 &counters_attr_log_num_rg.attr,
379 &counters_attr_log_num_databuf.attr,
380 &counters_attr_log_blks_free.attr,
381 &counters_attr_jd_blocks.attr,
382 &counters_attr_reclaim_count.attr,
383 &counters_attr_log_wraps.attr,
384 &counters_attr_fh2dentry_misses.attr,
385 &counters_attr_reclaimed.attr,
386 &counters_attr_log_flush_incore.attr,
387 &counters_attr_log_flush_ondisk.attr,
388 &counters_attr_glock_nq_calls.attr,
389 &counters_attr_glock_dq_calls.attr,
390 &counters_attr_glock_prefetch_calls.attr,
391 &counters_attr_lm_lock_calls.attr,
392 &counters_attr_lm_unlock_calls.attr,
393 &counters_attr_lm_callbacks.attr,
394 &counters_attr_ops_address.attr,
395 &counters_attr_ops_dentry.attr,
396 &counters_attr_ops_export.attr,
397 &counters_attr_ops_file.attr,
398 &counters_attr_ops_inode.attr,
399 &counters_attr_ops_super.attr,
400 &counters_attr_ops_vm.attr,
405 * get and set struct gfs2_tune fields
408 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
410 return sprintf(buf, "%u %u\n", sdp->sd_tune.gt_quota_scale_num,
411 sdp->sd_tune.gt_quota_scale_den);
414 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
417 struct gfs2_tune *gt = &sdp->sd_tune;
420 if (!capable(CAP_SYS_ADMIN))
423 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
426 spin_lock(>->gt_spin);
427 gt->gt_quota_scale_num = x;
428 gt->gt_quota_scale_den = y;
429 spin_unlock(>->gt_spin);
433 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
434 int check_zero, const char *buf, size_t len)
436 struct gfs2_tune *gt = &sdp->sd_tune;
439 if (!capable(CAP_SYS_ADMIN))
442 x = simple_strtoul(buf, NULL, 0);
444 if (check_zero && !x)
447 spin_lock(>->gt_spin);
449 spin_unlock(>->gt_spin);
454 struct attribute attr;
455 ssize_t (*show)(struct gfs2_sbd *, char *);
456 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
459 #define TUNE_ATTR_3(name, show, store) \
460 static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
462 #define TUNE_ATTR_2(name, store) \
463 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
465 return sprintf(buf, "%u\n", sdp->sd_tune.gt_##name); \
467 TUNE_ATTR_3(name, name##_show, store)
469 #define TUNE_ATTR(name, check_zero) \
470 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
472 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
474 TUNE_ATTR_2(name, name##_store)
476 #define TUNE_ATTR_DAEMON(name, process) \
477 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
479 ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \
480 wake_up_process(sdp->sd_##process); \
483 TUNE_ATTR_2(name, name##_store)
485 TUNE_ATTR(ilimit, 0);
486 TUNE_ATTR(ilimit_tries, 0);
487 TUNE_ATTR(ilimit_min, 0);
488 TUNE_ATTR(demote_secs, 0);
489 TUNE_ATTR(incore_log_blocks, 0);
490 TUNE_ATTR(log_flush_secs, 0);
491 TUNE_ATTR(jindex_refresh_secs, 0);
492 TUNE_ATTR(quota_warn_period, 0);
493 TUNE_ATTR(quota_quantum, 0);
494 TUNE_ATTR(atime_quantum, 0);
495 TUNE_ATTR(max_readahead, 0);
496 TUNE_ATTR(complain_secs, 0);
497 TUNE_ATTR(reclaim_limit, 0);
498 TUNE_ATTR(prefetch_secs, 0);
499 TUNE_ATTR(statfs_slow, 0);
500 TUNE_ATTR(new_files_jdata, 0);
501 TUNE_ATTR(new_files_directio, 0);
502 TUNE_ATTR(quota_simul_sync, 1);
503 TUNE_ATTR(quota_cache_secs, 1);
504 TUNE_ATTR(max_atomic_write, 1);
505 TUNE_ATTR(stall_secs, 1);
506 TUNE_ATTR(entries_per_readdir, 1);
507 TUNE_ATTR(greedy_default, 1);
508 TUNE_ATTR(greedy_quantum, 1);
509 TUNE_ATTR(greedy_max, 1);
510 TUNE_ATTR(statfs_quantum, 1);
511 TUNE_ATTR_DAEMON(scand_secs, scand_process);
512 TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
513 TUNE_ATTR_DAEMON(logd_secs, logd_process);
514 TUNE_ATTR_DAEMON(quotad_secs, quotad_process);
515 TUNE_ATTR_DAEMON(inoded_secs, inoded_process);
516 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
518 static struct attribute *tune_attrs[] = {
519 &tune_attr_ilimit.attr,
520 &tune_attr_ilimit_tries.attr,
521 &tune_attr_ilimit_min.attr,
522 &tune_attr_demote_secs.attr,
523 &tune_attr_incore_log_blocks.attr,
524 &tune_attr_log_flush_secs.attr,
525 &tune_attr_jindex_refresh_secs.attr,
526 &tune_attr_quota_warn_period.attr,
527 &tune_attr_quota_quantum.attr,
528 &tune_attr_atime_quantum.attr,
529 &tune_attr_max_readahead.attr,
530 &tune_attr_complain_secs.attr,
531 &tune_attr_reclaim_limit.attr,
532 &tune_attr_prefetch_secs.attr,
533 &tune_attr_statfs_slow.attr,
534 &tune_attr_quota_simul_sync.attr,
535 &tune_attr_quota_cache_secs.attr,
536 &tune_attr_max_atomic_write.attr,
537 &tune_attr_stall_secs.attr,
538 &tune_attr_entries_per_readdir.attr,
539 &tune_attr_greedy_default.attr,
540 &tune_attr_greedy_quantum.attr,
541 &tune_attr_greedy_max.attr,
542 &tune_attr_statfs_quantum.attr,
543 &tune_attr_scand_secs.attr,
544 &tune_attr_recoverd_secs.attr,
545 &tune_attr_logd_secs.attr,
546 &tune_attr_quotad_secs.attr,
547 &tune_attr_inoded_secs.attr,
548 &tune_attr_quota_scale.attr,
549 &tune_attr_new_files_jdata.attr,
550 &tune_attr_new_files_directio.attr,
554 static struct attribute_group lockstruct_group = {
555 .name = "lockstruct",
556 .attrs = lockstruct_attrs
559 static struct attribute_group counters_group = {
561 .attrs = counters_attrs
564 static struct attribute_group args_group = {
569 static struct attribute_group tune_group = {
574 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
578 sdp->sd_kobj.kset = &gfs2_kset;
579 sdp->sd_kobj.ktype = &gfs2_ktype;
581 error = kobject_set_name(&sdp->sd_kobj, "%s", sdp->sd_table_name);
585 error = kobject_register(&sdp->sd_kobj);
589 error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
593 error = sysfs_create_group(&sdp->sd_kobj, &counters_group);
595 goto fail_lockstruct;
597 error = sysfs_create_group(&sdp->sd_kobj, &args_group);
601 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
608 sysfs_remove_group(&sdp->sd_kobj, &args_group);
610 sysfs_remove_group(&sdp->sd_kobj, &counters_group);
612 sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
614 kobject_unregister(&sdp->sd_kobj);
619 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
621 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
622 sysfs_remove_group(&sdp->sd_kobj, &args_group);
623 sysfs_remove_group(&sdp->sd_kobj, &counters_group);
624 sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
625 kobject_unregister(&sdp->sd_kobj);
628 int gfs2_sys_init(void)
630 gfs2_sys_margs = NULL;
631 spin_lock_init(&gfs2_sys_margs_lock);
632 return kset_register(&gfs2_kset);
635 void gfs2_sys_uninit(void)
637 kfree(gfs2_sys_margs);
638 kset_unregister(&gfs2_kset);