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
);