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/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/module.h>
15 #include <linux/kobject.h>
16 #include <asm/uaccess.h>
17 #include <linux/gfs2_ondisk.h>
18 #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 const 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 struct super_block
*s
= sdp
->sd_vfs
;
85 const u8
*uuid
= s
->s_uuid
;
87 if (!gfs2_uuid_valid(uuid
))
89 return snprintf(buf
, PAGE_SIZE
, "%pUB\n", uuid
);
92 static ssize_t
freeze_show(struct gfs2_sbd
*sdp
, char *buf
)
96 mutex_lock(&sdp
->sd_freeze_lock
);
97 count
= sdp
->sd_freeze_count
;
98 mutex_unlock(&sdp
->sd_freeze_lock
);
100 return snprintf(buf
, PAGE_SIZE
, "%u\n", count
);
103 static ssize_t
freeze_store(struct gfs2_sbd
*sdp
, const char *buf
, size_t len
)
107 int n
= simple_strtol(buf
, NULL
, 0);
109 if (!capable(CAP_SYS_ADMIN
))
114 gfs2_unfreeze_fs(sdp
);
117 error
= gfs2_freeze_fs(sdp
);
124 fs_warn(sdp
, "freeze %d error %d", n
, error
);
129 static ssize_t
withdraw_show(struct gfs2_sbd
*sdp
, char *buf
)
131 unsigned int b
= test_bit(SDF_SHUTDOWN
, &sdp
->sd_flags
);
132 return snprintf(buf
, PAGE_SIZE
, "%u\n", b
);
135 static ssize_t
withdraw_store(struct gfs2_sbd
*sdp
, const char *buf
, size_t len
)
137 if (!capable(CAP_SYS_ADMIN
))
140 if (simple_strtol(buf
, NULL
, 0) != 1)
143 gfs2_lm_withdraw(sdp
,
144 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
149 static ssize_t
statfs_sync_store(struct gfs2_sbd
*sdp
, const char *buf
,
152 if (!capable(CAP_SYS_ADMIN
))
155 if (simple_strtol(buf
, NULL
, 0) != 1)
158 gfs2_statfs_sync(sdp
->sd_vfs
, 0);
162 static ssize_t
quota_sync_store(struct gfs2_sbd
*sdp
, const char *buf
,
165 if (!capable(CAP_SYS_ADMIN
))
168 if (simple_strtol(buf
, NULL
, 0) != 1)
171 gfs2_quota_sync(sdp
->sd_vfs
, 0);
175 static ssize_t
quota_refresh_user_store(struct gfs2_sbd
*sdp
, const char *buf
,
181 if (!capable(CAP_SYS_ADMIN
))
184 id
= simple_strtoul(buf
, NULL
, 0);
186 error
= gfs2_quota_refresh(sdp
, 1, id
);
187 return error
? error
: len
;
190 static ssize_t
quota_refresh_group_store(struct gfs2_sbd
*sdp
, const char *buf
,
196 if (!capable(CAP_SYS_ADMIN
))
199 id
= simple_strtoul(buf
, NULL
, 0);
201 error
= gfs2_quota_refresh(sdp
, 0, id
);
202 return error
? error
: len
;
205 static ssize_t
demote_rq_store(struct gfs2_sbd
*sdp
, const char *buf
, size_t len
)
207 struct gfs2_glock
*gl
;
208 const struct gfs2_glock_operations
*glops
;
211 unsigned long long glnum
;
215 if (!capable(CAP_SYS_ADMIN
))
218 rv
= sscanf(buf
, "%u:%llu %15s", &gltype
, &glnum
,
223 if (strcmp(mode
, "EX") == 0)
224 glmode
= LM_ST_UNLOCKED
;
225 else if ((strcmp(mode
, "CW") == 0) || (strcmp(mode
, "DF") == 0))
226 glmode
= LM_ST_DEFERRED
;
227 else if ((strcmp(mode
, "PR") == 0) || (strcmp(mode
, "SH") == 0))
228 glmode
= LM_ST_SHARED
;
232 if (gltype
> LM_TYPE_JOURNAL
)
234 if (gltype
== LM_TYPE_NONDISK
&& glnum
== GFS2_TRANS_LOCK
)
235 glops
= &gfs2_trans_glops
;
237 glops
= gfs2_glops_list
[gltype
];
240 if (!test_and_set_bit(SDF_DEMOTE
, &sdp
->sd_flags
))
241 fs_info(sdp
, "demote interface used\n");
242 rv
= gfs2_glock_get(sdp
, glnum
, glops
, 0, &gl
);
245 gfs2_glock_cb(gl
, glmode
);
251 #define GFS2_ATTR(name, mode, show, store) \
252 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
254 GFS2_ATTR(id
, 0444, id_show
, NULL
);
255 GFS2_ATTR(fsname
, 0444, fsname_show
, NULL
);
256 GFS2_ATTR(uuid
, 0444, uuid_show
, NULL
);
257 GFS2_ATTR(freeze
, 0644, freeze_show
, freeze_store
);
258 GFS2_ATTR(withdraw
, 0644, withdraw_show
, withdraw_store
);
259 GFS2_ATTR(statfs_sync
, 0200, NULL
, statfs_sync_store
);
260 GFS2_ATTR(quota_sync
, 0200, NULL
, quota_sync_store
);
261 GFS2_ATTR(quota_refresh_user
, 0200, NULL
, quota_refresh_user_store
);
262 GFS2_ATTR(quota_refresh_group
, 0200, NULL
, quota_refresh_group_store
);
263 GFS2_ATTR(demote_rq
, 0200, NULL
, demote_rq_store
);
265 static struct attribute
*gfs2_attrs
[] = {
267 &gfs2_attr_fsname
.attr
,
268 &gfs2_attr_uuid
.attr
,
269 &gfs2_attr_freeze
.attr
,
270 &gfs2_attr_withdraw
.attr
,
271 &gfs2_attr_statfs_sync
.attr
,
272 &gfs2_attr_quota_sync
.attr
,
273 &gfs2_attr_quota_refresh_user
.attr
,
274 &gfs2_attr_quota_refresh_group
.attr
,
275 &gfs2_attr_demote_rq
.attr
,
279 static void gfs2_sbd_release(struct kobject
*kobj
)
281 struct gfs2_sbd
*sdp
= container_of(kobj
, struct gfs2_sbd
, sd_kobj
);
286 static struct kobj_type gfs2_ktype
= {
287 .release
= gfs2_sbd_release
,
288 .default_attrs
= gfs2_attrs
,
289 .sysfs_ops
= &gfs2_attr_ops
,
294 * lock_module. Originally from lock_dlm
297 static ssize_t
proto_name_show(struct gfs2_sbd
*sdp
, char *buf
)
299 const struct lm_lockops
*ops
= sdp
->sd_lockstruct
.ls_ops
;
300 return sprintf(buf
, "%s\n", ops
->lm_proto_name
);
303 static ssize_t
block_show(struct gfs2_sbd
*sdp
, char *buf
)
305 struct lm_lockstruct
*ls
= &sdp
->sd_lockstruct
;
309 if (test_bit(DFL_BLOCK_LOCKS
, &ls
->ls_recover_flags
))
311 ret
= sprintf(buf
, "%d\n", val
);
315 static ssize_t
block_store(struct gfs2_sbd
*sdp
, const char *buf
, size_t len
)
317 struct lm_lockstruct
*ls
= &sdp
->sd_lockstruct
;
321 val
= simple_strtol(buf
, NULL
, 0);
324 set_bit(DFL_BLOCK_LOCKS
, &ls
->ls_recover_flags
);
326 clear_bit(DFL_BLOCK_LOCKS
, &ls
->ls_recover_flags
);
327 smp_mb__after_clear_bit();
328 gfs2_glock_thaw(sdp
);
335 static ssize_t
lkfirst_show(struct gfs2_sbd
*sdp
, char *buf
)
337 struct lm_lockstruct
*ls
= &sdp
->sd_lockstruct
;
338 return sprintf(buf
, "%d\n", ls
->ls_first
);
341 static ssize_t
lkfirst_store(struct gfs2_sbd
*sdp
, const char *buf
, size_t len
)
346 rv
= sscanf(buf
, "%u", &first
);
347 if (rv
!= 1 || first
> 1)
349 rv
= wait_for_completion_killable(&sdp
->sd_locking_init
);
352 spin_lock(&sdp
->sd_jindex_spin
);
354 if (test_bit(SDF_NOJOURNALID
, &sdp
->sd_flags
) == 0)
357 if (sdp
->sd_args
.ar_spectator
)
359 if (sdp
->sd_lockstruct
.ls_ops
->lm_mount
== NULL
)
361 sdp
->sd_lockstruct
.ls_first
= first
;
364 spin_unlock(&sdp
->sd_jindex_spin
);
365 return rv
? rv
: len
;
368 static ssize_t
first_done_show(struct gfs2_sbd
*sdp
, char *buf
)
370 struct lm_lockstruct
*ls
= &sdp
->sd_lockstruct
;
371 return sprintf(buf
, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE
, &ls
->ls_recover_flags
));
374 int gfs2_recover_set(struct gfs2_sbd
*sdp
, unsigned jid
)
376 struct gfs2_jdesc
*jd
;
379 spin_lock(&sdp
->sd_jindex_spin
);
381 if (sdp
->sd_jdesc
->jd_jid
== jid
)
384 list_for_each_entry(jd
, &sdp
->sd_jindex_list
, jd_list
) {
385 if (jd
->jd_jid
!= jid
)
387 rv
= gfs2_recover_journal(jd
, false);
391 spin_unlock(&sdp
->sd_jindex_spin
);
395 static ssize_t
recover_store(struct gfs2_sbd
*sdp
, const char *buf
, size_t len
)
400 rv
= sscanf(buf
, "%u", &jid
);
404 if (test_bit(SDF_NORECOVERY
, &sdp
->sd_flags
)) {
409 rv
= gfs2_recover_set(sdp
, jid
);
411 return rv
? rv
: len
;
414 static ssize_t
recover_done_show(struct gfs2_sbd
*sdp
, char *buf
)
416 struct lm_lockstruct
*ls
= &sdp
->sd_lockstruct
;
417 return sprintf(buf
, "%d\n", ls
->ls_recover_jid_done
);
420 static ssize_t
recover_status_show(struct gfs2_sbd
*sdp
, char *buf
)
422 struct lm_lockstruct
*ls
= &sdp
->sd_lockstruct
;
423 return sprintf(buf
, "%d\n", ls
->ls_recover_jid_status
);
426 static ssize_t
jid_show(struct gfs2_sbd
*sdp
, char *buf
)
428 return sprintf(buf
, "%d\n", sdp
->sd_lockstruct
.ls_jid
);
431 static ssize_t
jid_store(struct gfs2_sbd
*sdp
, const char *buf
, size_t len
)
436 rv
= sscanf(buf
, "%d", &jid
);
439 rv
= wait_for_completion_killable(&sdp
->sd_locking_init
);
442 spin_lock(&sdp
->sd_jindex_spin
);
444 if (sdp
->sd_lockstruct
.ls_ops
->lm_mount
== NULL
)
447 if (test_bit(SDF_NOJOURNALID
, &sdp
->sd_flags
) == 0)
450 if (sdp
->sd_args
.ar_spectator
&& jid
> 0)
452 sdp
->sd_lockstruct
.ls_jid
= jid
;
453 clear_bit(SDF_NOJOURNALID
, &sdp
->sd_flags
);
454 smp_mb__after_clear_bit();
455 wake_up_bit(&sdp
->sd_flags
, SDF_NOJOURNALID
);
457 spin_unlock(&sdp
->sd_jindex_spin
);
458 return rv
? rv
: len
;
461 #define GDLM_ATTR(_name,_mode,_show,_store) \
462 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
464 GDLM_ATTR(proto_name
, 0444, proto_name_show
, NULL
);
465 GDLM_ATTR(block
, 0644, block_show
, block_store
);
466 GDLM_ATTR(withdraw
, 0644, withdraw_show
, withdraw_store
);
467 GDLM_ATTR(jid
, 0644, jid_show
, jid_store
);
468 GDLM_ATTR(first
, 0644, lkfirst_show
, lkfirst_store
);
469 GDLM_ATTR(first_done
, 0444, first_done_show
, NULL
);
470 GDLM_ATTR(recover
, 0600, NULL
, recover_store
);
471 GDLM_ATTR(recover_done
, 0444, recover_done_show
, NULL
);
472 GDLM_ATTR(recover_status
, 0444, recover_status_show
, NULL
);
474 static struct attribute
*lock_module_attrs
[] = {
475 &gdlm_attr_proto_name
.attr
,
476 &gdlm_attr_block
.attr
,
477 &gdlm_attr_withdraw
.attr
,
479 &gdlm_attr_first
.attr
,
480 &gdlm_attr_first_done
.attr
,
481 &gdlm_attr_recover
.attr
,
482 &gdlm_attr_recover_done
.attr
,
483 &gdlm_attr_recover_status
.attr
,
488 * get and set struct gfs2_tune fields
491 static ssize_t
quota_scale_show(struct gfs2_sbd
*sdp
, char *buf
)
493 return snprintf(buf
, PAGE_SIZE
, "%u %u\n",
494 sdp
->sd_tune
.gt_quota_scale_num
,
495 sdp
->sd_tune
.gt_quota_scale_den
);
498 static ssize_t
quota_scale_store(struct gfs2_sbd
*sdp
, const char *buf
,
501 struct gfs2_tune
*gt
= &sdp
->sd_tune
;
504 if (!capable(CAP_SYS_ADMIN
))
507 if (sscanf(buf
, "%u %u", &x
, &y
) != 2 || !y
)
510 spin_lock(>
->gt_spin
);
511 gt
->gt_quota_scale_num
= x
;
512 gt
->gt_quota_scale_den
= y
;
513 spin_unlock(>
->gt_spin
);
517 static ssize_t
tune_set(struct gfs2_sbd
*sdp
, unsigned int *field
,
518 int check_zero
, const char *buf
, size_t len
)
520 struct gfs2_tune
*gt
= &sdp
->sd_tune
;
523 if (!capable(CAP_SYS_ADMIN
))
526 x
= simple_strtoul(buf
, NULL
, 0);
528 if (check_zero
&& !x
)
531 spin_lock(>
->gt_spin
);
533 spin_unlock(>
->gt_spin
);
537 #define TUNE_ATTR_3(name, show, store) \
538 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
540 #define TUNE_ATTR_2(name, store) \
541 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
543 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
545 TUNE_ATTR_3(name, name##_show, store)
547 #define TUNE_ATTR(name, check_zero) \
548 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
550 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
552 TUNE_ATTR_2(name, name##_store)
554 TUNE_ATTR(quota_warn_period
, 0);
555 TUNE_ATTR(quota_quantum
, 0);
556 TUNE_ATTR(max_readahead
, 0);
557 TUNE_ATTR(complain_secs
, 0);
558 TUNE_ATTR(statfs_slow
, 0);
559 TUNE_ATTR(new_files_jdata
, 0);
560 TUNE_ATTR(quota_simul_sync
, 1);
561 TUNE_ATTR(statfs_quantum
, 1);
562 TUNE_ATTR_3(quota_scale
, quota_scale_show
, quota_scale_store
);
564 static struct attribute
*tune_attrs
[] = {
565 &tune_attr_quota_warn_period
.attr
,
566 &tune_attr_quota_quantum
.attr
,
567 &tune_attr_max_readahead
.attr
,
568 &tune_attr_complain_secs
.attr
,
569 &tune_attr_statfs_slow
.attr
,
570 &tune_attr_quota_simul_sync
.attr
,
571 &tune_attr_statfs_quantum
.attr
,
572 &tune_attr_quota_scale
.attr
,
573 &tune_attr_new_files_jdata
.attr
,
577 static struct attribute_group tune_group
= {
582 static struct attribute_group lock_module_group
= {
583 .name
= "lock_module",
584 .attrs
= lock_module_attrs
,
587 int gfs2_sys_fs_add(struct gfs2_sbd
*sdp
)
589 struct super_block
*sb
= sdp
->sd_vfs
;
593 char *envp
[] = { ro
, spectator
, NULL
};
594 int sysfs_frees_sdp
= 0;
596 sprintf(ro
, "RDONLY=%d", (sb
->s_flags
& MS_RDONLY
) ? 1 : 0);
597 sprintf(spectator
, "SPECTATOR=%d", sdp
->sd_args
.ar_spectator
? 1 : 0);
599 sdp
->sd_kobj
.kset
= gfs2_kset
;
600 error
= kobject_init_and_add(&sdp
->sd_kobj
, &gfs2_ktype
, NULL
,
601 "%s", sdp
->sd_table_name
);
605 sysfs_frees_sdp
= 1; /* Freeing sdp is now done by sysfs calling
606 function gfs2_sbd_release. */
607 error
= sysfs_create_group(&sdp
->sd_kobj
, &tune_group
);
611 error
= sysfs_create_group(&sdp
->sd_kobj
, &lock_module_group
);
615 error
= sysfs_create_link(&sdp
->sd_kobj
,
616 &disk_to_dev(sb
->s_bdev
->bd_disk
)->kobj
,
619 goto fail_lock_module
;
621 kobject_uevent_env(&sdp
->sd_kobj
, KOBJ_ADD
, envp
);
625 sysfs_remove_group(&sdp
->sd_kobj
, &lock_module_group
);
627 sysfs_remove_group(&sdp
->sd_kobj
, &tune_group
);
629 free_percpu(sdp
->sd_lkstats
);
630 fs_err(sdp
, "error %d adding sysfs files", error
);
632 kobject_put(&sdp
->sd_kobj
);
635 sb
->s_fs_info
= NULL
;
639 void gfs2_sys_fs_del(struct gfs2_sbd
*sdp
)
641 sysfs_remove_link(&sdp
->sd_kobj
, "device");
642 sysfs_remove_group(&sdp
->sd_kobj
, &tune_group
);
643 sysfs_remove_group(&sdp
->sd_kobj
, &lock_module_group
);
644 kobject_put(&sdp
->sd_kobj
);
647 static int gfs2_uevent(struct kset
*kset
, struct kobject
*kobj
,
648 struct kobj_uevent_env
*env
)
650 struct gfs2_sbd
*sdp
= container_of(kobj
, struct gfs2_sbd
, sd_kobj
);
651 struct super_block
*s
= sdp
->sd_vfs
;
652 const u8
*uuid
= s
->s_uuid
;
654 add_uevent_var(env
, "LOCKTABLE=%s", sdp
->sd_table_name
);
655 add_uevent_var(env
, "LOCKPROTO=%s", sdp
->sd_proto_name
);
656 if (!test_bit(SDF_NOJOURNALID
, &sdp
->sd_flags
))
657 add_uevent_var(env
, "JOURNALID=%d", sdp
->sd_lockstruct
.ls_jid
);
658 if (gfs2_uuid_valid(uuid
))
659 add_uevent_var(env
, "UUID=%pUB", uuid
);
663 static const struct kset_uevent_ops gfs2_uevent_ops
= {
664 .uevent
= gfs2_uevent
,
667 int gfs2_sys_init(void)
669 gfs2_kset
= kset_create_and_add("gfs2", &gfs2_uevent_ops
, fs_kobj
);
675 void gfs2_sys_uninit(void)
677 kset_unregister(gfs2_kset
);