2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 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 version 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/uaccess.h>
18 #include <linux/gfs2_ondisk.h>
19 #include <linux/genhd.h>
31 struct attribute attr;
32 ssize_t (*show)(struct gfs2_sbd *, char *);
33 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
36 static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
39 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
40 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
41 return a->show ? a->show(sdp, buf) : 0;
44 static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
45 const char *buf, size_t len)
47 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
48 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
49 return a->store ? a->store(sdp, buf, len) : len;
52 static struct sysfs_ops gfs2_attr_ops = {
53 .show = gfs2_attr_show,
54 .store = gfs2_attr_store,
58 static struct kset *gfs2_kset;
60 static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
62 return snprintf(buf, PAGE_SIZE, "%u:%u\n",
63 MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
66 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
68 return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
71 static int gfs2_uuid_valid(const u8 *uuid)
75 for (i = 0; i < 16; i++) {
82 static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
84 const u8 *uuid = sdp->sd_sb.sb_uuid;
86 if (!gfs2_uuid_valid(uuid))
88 return snprintf(buf, PAGE_SIZE, "%02X%02X%02X%02X-%02X%02X-"
89 "%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n",
90 uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5],
91 uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11],
92 uuid[12], uuid[13], uuid[14], uuid[15]);
95 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
99 mutex_lock(&sdp->sd_freeze_lock);
100 count = sdp->sd_freeze_count;
101 mutex_unlock(&sdp->sd_freeze_lock);
103 return snprintf(buf, PAGE_SIZE, "%u\n", count);
106 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
110 int n = simple_strtol(buf, NULL, 0);
112 if (!capable(CAP_SYS_ADMIN))
117 gfs2_unfreeze_fs(sdp);
120 error = gfs2_freeze_fs(sdp);
127 fs_warn(sdp, "freeze %d error %d", n, error);
132 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
134 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
135 return snprintf(buf, PAGE_SIZE, "%u\n", b);
138 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
140 if (!capable(CAP_SYS_ADMIN))
143 if (simple_strtol(buf, NULL, 0) != 1)
146 gfs2_lm_withdraw(sdp,
147 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
152 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
155 if (!capable(CAP_SYS_ADMIN))
158 if (simple_strtol(buf, NULL, 0) != 1)
161 gfs2_statfs_sync(sdp->sd_vfs, 0);
165 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
168 if (!capable(CAP_SYS_ADMIN))
171 if (simple_strtol(buf, NULL, 0) != 1)
174 gfs2_quota_sync(sdp->sd_vfs, 0);
178 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
184 if (!capable(CAP_SYS_ADMIN))
187 id = simple_strtoul(buf, NULL, 0);
189 error = gfs2_quota_refresh(sdp, 1, id);
190 return error ? error : len;
193 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
199 if (!capable(CAP_SYS_ADMIN))
202 id = simple_strtoul(buf, NULL, 0);
204 error = gfs2_quota_refresh(sdp, 0, id);
205 return error ? error : len;
208 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
210 struct gfs2_glock *gl;
211 const struct gfs2_glock_operations *glops;
214 unsigned long long glnum;
218 if (!capable(CAP_SYS_ADMIN))
221 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
226 if (strcmp(mode, "EX") == 0)
227 glmode = LM_ST_UNLOCKED;
228 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
229 glmode = LM_ST_DEFERRED;
230 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
231 glmode = LM_ST_SHARED;
235 if (gltype > LM_TYPE_JOURNAL)
237 glops = gfs2_glops_list[gltype];
240 rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
243 gfs2_glock_cb(gl, glmode);
249 #define GFS2_ATTR(name, mode, show, store) \
250 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
252 GFS2_ATTR(id, 0444, id_show, NULL);
253 GFS2_ATTR(fsname, 0444, fsname_show, NULL);
254 GFS2_ATTR(uuid, 0444, uuid_show, NULL);
255 GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
256 GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
257 GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
258 GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
259 GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
260 GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
261 GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
263 static struct attribute *gfs2_attrs[] = {
265 &gfs2_attr_fsname.attr,
266 &gfs2_attr_uuid.attr,
267 &gfs2_attr_freeze.attr,
268 &gfs2_attr_withdraw.attr,
269 &gfs2_attr_statfs_sync.attr,
270 &gfs2_attr_quota_sync.attr,
271 &gfs2_attr_quota_refresh_user.attr,
272 &gfs2_attr_quota_refresh_group.attr,
273 &gfs2_attr_demote_rq.attr,
277 static struct kobj_type gfs2_ktype = {
278 .default_attrs = gfs2_attrs,
279 .sysfs_ops = &gfs2_attr_ops,
284 * lock_module. Originally from lock_dlm
287 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
289 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
290 return sprintf(buf, "%s\n", ops->lm_proto_name);
293 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
295 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
299 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
301 ret = sprintf(buf, "%d\n", val);
305 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
307 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
311 val = simple_strtol(buf, NULL, 0);
314 set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
316 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
317 smp_mb__after_clear_bit();
318 gfs2_glock_thaw(sdp);
325 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
327 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
328 return sprintf(buf, "%d\n", ls->ls_first);
331 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
333 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
334 return sprintf(buf, "%d\n", ls->ls_first_done);
337 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
340 struct gfs2_jdesc *jd;
343 rv = sscanf(buf, "%u", &jid);
348 spin_lock(&sdp->sd_jindex_spin);
349 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags))
352 if (sdp->sd_jdesc->jd_jid == jid)
355 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
356 if (jd->jd_jid != jid)
358 rv = slow_work_enqueue(&jd->jd_work);
362 spin_unlock(&sdp->sd_jindex_spin);
363 return rv ? rv : len;
366 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
368 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
369 return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
372 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
374 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
375 return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
378 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
380 return sprintf(buf, "%u\n", sdp->sd_lockstruct.ls_jid);
383 #define GDLM_ATTR(_name,_mode,_show,_store) \
384 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
386 GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
387 GDLM_ATTR(block, 0644, block_show, block_store);
388 GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
389 GDLM_ATTR(jid, 0444, jid_show, NULL);
390 GDLM_ATTR(first, 0444, lkfirst_show, NULL);
391 GDLM_ATTR(first_done, 0444, first_done_show, NULL);
392 GDLM_ATTR(recover, 0600, NULL, recover_store);
393 GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
394 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
396 static struct attribute *lock_module_attrs[] = {
397 &gdlm_attr_proto_name.attr,
398 &gdlm_attr_block.attr,
399 &gdlm_attr_withdraw.attr,
401 &gdlm_attr_first.attr,
402 &gdlm_attr_first_done.attr,
403 &gdlm_attr_recover.attr,
404 &gdlm_attr_recover_done.attr,
405 &gdlm_attr_recover_status.attr,
410 * get and set struct gfs2_tune fields
413 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
415 return snprintf(buf, PAGE_SIZE, "%u %u\n",
416 sdp->sd_tune.gt_quota_scale_num,
417 sdp->sd_tune.gt_quota_scale_den);
420 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
423 struct gfs2_tune *gt = &sdp->sd_tune;
426 if (!capable(CAP_SYS_ADMIN))
429 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
432 spin_lock(>->gt_spin);
433 gt->gt_quota_scale_num = x;
434 gt->gt_quota_scale_den = y;
435 spin_unlock(>->gt_spin);
439 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
440 int check_zero, const char *buf, size_t len)
442 struct gfs2_tune *gt = &sdp->sd_tune;
445 if (!capable(CAP_SYS_ADMIN))
448 x = simple_strtoul(buf, NULL, 0);
450 if (check_zero && !x)
453 spin_lock(>->gt_spin);
455 spin_unlock(>->gt_spin);
459 #define TUNE_ATTR_3(name, show, store) \
460 static struct gfs2_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 snprintf(buf, PAGE_SIZE, "%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 TUNE_ATTR(incore_log_blocks, 0);
477 TUNE_ATTR(log_flush_secs, 0);
478 TUNE_ATTR(quota_warn_period, 0);
479 TUNE_ATTR(quota_quantum, 0);
480 TUNE_ATTR(max_readahead, 0);
481 TUNE_ATTR(complain_secs, 0);
482 TUNE_ATTR(statfs_slow, 0);
483 TUNE_ATTR(new_files_jdata, 0);
484 TUNE_ATTR(quota_simul_sync, 1);
485 TUNE_ATTR(stall_secs, 1);
486 TUNE_ATTR(statfs_quantum, 1);
487 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
489 static struct attribute *tune_attrs[] = {
490 &tune_attr_incore_log_blocks.attr,
491 &tune_attr_log_flush_secs.attr,
492 &tune_attr_quota_warn_period.attr,
493 &tune_attr_quota_quantum.attr,
494 &tune_attr_max_readahead.attr,
495 &tune_attr_complain_secs.attr,
496 &tune_attr_statfs_slow.attr,
497 &tune_attr_quota_simul_sync.attr,
498 &tune_attr_stall_secs.attr,
499 &tune_attr_statfs_quantum.attr,
500 &tune_attr_quota_scale.attr,
501 &tune_attr_new_files_jdata.attr,
505 static struct attribute_group tune_group = {
510 static struct attribute_group lock_module_group = {
511 .name = "lock_module",
512 .attrs = lock_module_attrs,
515 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
517 struct super_block *sb = sdp->sd_vfs;
521 char *envp[] = { ro, spectator, NULL };
523 sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
524 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
526 sdp->sd_kobj.kset = gfs2_kset;
527 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
528 "%s", sdp->sd_table_name);
532 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
536 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
540 error = sysfs_create_link(&sdp->sd_kobj,
541 &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
544 goto fail_lock_module;
546 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
550 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
552 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
554 kobject_put(&sdp->sd_kobj);
556 fs_err(sdp, "error %d adding sysfs files", error);
560 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
562 sysfs_remove_link(&sdp->sd_kobj, "device");
563 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
564 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
565 kobject_put(&sdp->sd_kobj);
568 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
569 struct kobj_uevent_env *env)
571 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
572 const u8 *uuid = sdp->sd_sb.sb_uuid;
574 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
575 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
576 if (!sdp->sd_args.ar_spectator)
577 add_uevent_var(env, "JOURNALID=%u", sdp->sd_lockstruct.ls_jid);
578 if (gfs2_uuid_valid(uuid)) {
579 add_uevent_var(env, "UUID=%02X%02X%02X%02X-%02X%02X-%02X%02X-"
580 "%02X%02X-%02X%02X%02X%02X%02X%02X",
581 uuid[0], uuid[1], uuid[2], uuid[3], uuid[4],
582 uuid[5], uuid[6], uuid[7], uuid[8], uuid[9],
583 uuid[10], uuid[11], uuid[12], uuid[13],
589 static struct kset_uevent_ops gfs2_uevent_ops = {
590 .uevent = gfs2_uevent,
593 int gfs2_sys_init(void)
595 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
601 void gfs2_sys_uninit(void)
603 kset_unregister(gfs2_kset);