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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12 #include <linux/sched.h>
13 #include <linux/cred.h>
14 #include <linux/spinlock.h>
15 #include <linux/completion.h>
16 #include <linux/buffer_head.h>
17 #include <linux/module.h>
18 #include <linux/kobject.h>
19 #include <linux/uaccess.h>
20 #include <linux/gfs2_ondisk.h>
21 #include <linux/genhd.h>
34 struct attribute attr;
35 ssize_t (*show)(struct gfs2_sbd *, char *);
36 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
39 static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
42 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
43 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
44 return a->show ? a->show(sdp, buf) : 0;
47 static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
48 const char *buf, size_t len)
50 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
51 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
52 return a->store ? a->store(sdp, buf, len) : len;
55 static const struct sysfs_ops gfs2_attr_ops = {
56 .show = gfs2_attr_show,
57 .store = gfs2_attr_store,
61 static struct kset *gfs2_kset;
63 static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
65 return snprintf(buf, PAGE_SIZE, "%u:%u\n",
66 MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
69 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
71 return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
74 static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
76 struct super_block *s = sdp->sd_vfs;
79 if (uuid_is_null(&s->s_uuid))
81 return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid);
84 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
86 struct super_block *sb = sdp->sd_vfs;
87 int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
89 return snprintf(buf, PAGE_SIZE, "%d\n", frozen);
92 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
96 error = kstrtoint(buf, 0, &n);
100 if (!capable(CAP_SYS_ADMIN))
105 error = thaw_super(sdp->sd_vfs);
108 error = freeze_super(sdp->sd_vfs);
115 fs_warn(sdp, "freeze %d error %d", n, error);
122 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
124 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
125 return snprintf(buf, PAGE_SIZE, "%u\n", b);
128 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
132 if (!capable(CAP_SYS_ADMIN))
135 error = kstrtoint(buf, 0, &val);
142 gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n");
147 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
152 if (!capable(CAP_SYS_ADMIN))
155 error = kstrtoint(buf, 0, &val);
162 gfs2_statfs_sync(sdp->sd_vfs, 0);
166 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
171 if (!capable(CAP_SYS_ADMIN))
174 error = kstrtoint(buf, 0, &val);
181 gfs2_quota_sync(sdp->sd_vfs, 0);
185 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
192 if (!capable(CAP_SYS_ADMIN))
195 error = kstrtou32(buf, 0, &id);
199 qid = make_kqid(current_user_ns(), USRQUOTA, id);
203 error = gfs2_quota_refresh(sdp, qid);
204 return error ? error : len;
207 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
214 if (!capable(CAP_SYS_ADMIN))
217 error = kstrtou32(buf, 0, &id);
221 qid = make_kqid(current_user_ns(), GRPQUOTA, id);
225 error = gfs2_quota_refresh(sdp, qid);
226 return error ? error : len;
229 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
231 struct gfs2_glock *gl;
232 const struct gfs2_glock_operations *glops;
235 unsigned long long glnum;
239 if (!capable(CAP_SYS_ADMIN))
242 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
247 if (strcmp(mode, "EX") == 0)
248 glmode = LM_ST_UNLOCKED;
249 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
250 glmode = LM_ST_DEFERRED;
251 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
252 glmode = LM_ST_SHARED;
256 if (gltype > LM_TYPE_JOURNAL)
258 if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK)
259 glops = &gfs2_freeze_glops;
261 glops = gfs2_glops_list[gltype];
264 if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
265 fs_info(sdp, "demote interface used\n");
266 rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
269 gfs2_glock_cb(gl, glmode);
275 #define GFS2_ATTR(name, mode, show, store) \
276 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
278 GFS2_ATTR(id, 0444, id_show, NULL);
279 GFS2_ATTR(fsname, 0444, fsname_show, NULL);
280 GFS2_ATTR(uuid, 0444, uuid_show, NULL);
281 GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
282 GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
283 GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
284 GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
285 GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
286 GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
287 GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store);
289 static struct attribute *gfs2_attrs[] = {
291 &gfs2_attr_fsname.attr,
292 &gfs2_attr_uuid.attr,
293 &gfs2_attr_freeze.attr,
294 &gfs2_attr_withdraw.attr,
295 &gfs2_attr_statfs_sync.attr,
296 &gfs2_attr_quota_sync.attr,
297 &gfs2_attr_quota_refresh_user.attr,
298 &gfs2_attr_quota_refresh_group.attr,
299 &gfs2_attr_demote_rq.attr,
303 static void gfs2_sbd_release(struct kobject *kobj)
305 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
310 static struct kobj_type gfs2_ktype = {
311 .release = gfs2_sbd_release,
312 .default_attrs = gfs2_attrs,
313 .sysfs_ops = &gfs2_attr_ops,
318 * lock_module. Originally from lock_dlm
321 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
323 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
324 return sprintf(buf, "%s\n", ops->lm_proto_name);
327 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
329 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
333 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
335 ret = sprintf(buf, "%d\n", val);
339 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
341 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
344 ret = kstrtoint(buf, 0, &val);
349 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
351 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
352 smp_mb__after_atomic();
353 gfs2_glock_thaw(sdp);
360 static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
362 int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
364 return sprintf(buf, "%d\n", val);
367 static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
371 ret = kstrtoint(buf, 0, &val);
376 !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
377 complete(&sdp->sd_wdack);
383 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
385 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
386 return sprintf(buf, "%d\n", ls->ls_first);
389 static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
394 rv = sscanf(buf, "%u", &first);
395 if (rv != 1 || first > 1)
397 rv = wait_for_completion_killable(&sdp->sd_locking_init);
400 spin_lock(&sdp->sd_jindex_spin);
402 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
405 if (sdp->sd_args.ar_spectator)
407 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
409 sdp->sd_lockstruct.ls_first = first;
412 spin_unlock(&sdp->sd_jindex_spin);
413 return rv ? rv : len;
416 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
418 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
419 return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
422 int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
424 struct gfs2_jdesc *jd;
427 /* Wait for our primary journal to be initialized */
428 wait_for_completion(&sdp->sd_journal_ready);
430 spin_lock(&sdp->sd_jindex_spin);
432 if (sdp->sd_jdesc->jd_jid == jid)
435 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
436 if (jd->jd_jid != jid)
438 rv = gfs2_recover_journal(jd, false);
442 spin_unlock(&sdp->sd_jindex_spin);
446 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
451 rv = sscanf(buf, "%u", &jid);
455 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
460 rv = gfs2_recover_set(sdp, jid);
462 return rv ? rv : len;
465 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
467 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
468 return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
471 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
473 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
474 return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
477 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
479 return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
482 static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
487 rv = sscanf(buf, "%d", &jid);
490 rv = wait_for_completion_killable(&sdp->sd_locking_init);
493 spin_lock(&sdp->sd_jindex_spin);
495 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
498 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
501 if (sdp->sd_args.ar_spectator && jid > 0)
503 sdp->sd_lockstruct.ls_jid = jid;
504 clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
505 smp_mb__after_atomic();
506 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
508 spin_unlock(&sdp->sd_jindex_spin);
509 return rv ? rv : len;
512 #define GDLM_ATTR(_name,_mode,_show,_store) \
513 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
515 GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
516 GDLM_ATTR(block, 0644, block_show, block_store);
517 GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store);
518 GDLM_ATTR(jid, 0644, jid_show, jid_store);
519 GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store);
520 GDLM_ATTR(first_done, 0444, first_done_show, NULL);
521 GDLM_ATTR(recover, 0600, NULL, recover_store);
522 GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
523 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
525 static struct attribute *lock_module_attrs[] = {
526 &gdlm_attr_proto_name.attr,
527 &gdlm_attr_block.attr,
528 &gdlm_attr_withdraw.attr,
530 &gdlm_attr_first.attr,
531 &gdlm_attr_first_done.attr,
532 &gdlm_attr_recover.attr,
533 &gdlm_attr_recover_done.attr,
534 &gdlm_attr_recover_status.attr,
539 * get and set struct gfs2_tune fields
542 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
544 return snprintf(buf, PAGE_SIZE, "%u %u\n",
545 sdp->sd_tune.gt_quota_scale_num,
546 sdp->sd_tune.gt_quota_scale_den);
549 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
552 struct gfs2_tune *gt = &sdp->sd_tune;
555 if (!capable(CAP_SYS_ADMIN))
558 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
561 spin_lock(>->gt_spin);
562 gt->gt_quota_scale_num = x;
563 gt->gt_quota_scale_den = y;
564 spin_unlock(>->gt_spin);
568 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
569 int check_zero, const char *buf, size_t len)
571 struct gfs2_tune *gt = &sdp->sd_tune;
575 if (!capable(CAP_SYS_ADMIN))
578 error = kstrtouint(buf, 0, &x);
582 if (check_zero && !x)
585 spin_lock(>->gt_spin);
587 spin_unlock(>->gt_spin);
591 #define TUNE_ATTR_3(name, show, store) \
592 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
594 #define TUNE_ATTR_2(name, store) \
595 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
597 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
599 TUNE_ATTR_3(name, name##_show, store)
601 #define TUNE_ATTR(name, check_zero) \
602 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
604 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
606 TUNE_ATTR_2(name, name##_store)
608 TUNE_ATTR(quota_warn_period, 0);
609 TUNE_ATTR(quota_quantum, 0);
610 TUNE_ATTR(max_readahead, 0);
611 TUNE_ATTR(complain_secs, 0);
612 TUNE_ATTR(statfs_slow, 0);
613 TUNE_ATTR(new_files_jdata, 0);
614 TUNE_ATTR(statfs_quantum, 1);
615 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
617 static struct attribute *tune_attrs[] = {
618 &tune_attr_quota_warn_period.attr,
619 &tune_attr_quota_quantum.attr,
620 &tune_attr_max_readahead.attr,
621 &tune_attr_complain_secs.attr,
622 &tune_attr_statfs_slow.attr,
623 &tune_attr_statfs_quantum.attr,
624 &tune_attr_quota_scale.attr,
625 &tune_attr_new_files_jdata.attr,
629 static const struct attribute_group tune_group = {
634 static const struct attribute_group lock_module_group = {
635 .name = "lock_module",
636 .attrs = lock_module_attrs,
639 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
641 struct super_block *sb = sdp->sd_vfs;
645 char *envp[] = { ro, spectator, NULL };
646 int sysfs_frees_sdp = 0;
648 sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
649 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
651 sdp->sd_kobj.kset = gfs2_kset;
652 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
653 "%s", sdp->sd_table_name);
657 sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling
658 function gfs2_sbd_release. */
659 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
663 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
667 error = sysfs_create_link(&sdp->sd_kobj,
668 &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
671 goto fail_lock_module;
673 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
677 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
679 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
681 free_percpu(sdp->sd_lkstats);
682 fs_err(sdp, "error %d adding sysfs files", error);
684 kobject_put(&sdp->sd_kobj);
687 sb->s_fs_info = NULL;
691 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
693 sysfs_remove_link(&sdp->sd_kobj, "device");
694 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
695 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
696 kobject_put(&sdp->sd_kobj);
699 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
700 struct kobj_uevent_env *env)
702 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
703 struct super_block *s = sdp->sd_vfs;
705 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
706 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
707 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
708 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
709 if (!uuid_is_null(&s->s_uuid))
710 add_uevent_var(env, "UUID=%pUB", &s->s_uuid);
714 static const struct kset_uevent_ops gfs2_uevent_ops = {
715 .uevent = gfs2_uevent,
718 int gfs2_sys_init(void)
720 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
726 void gfs2_sys_uninit(void)
728 kset_unregister(gfs2_kset);