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 <linux/gfs2_ondisk.h>
18 #include <linux/lm_interface.h>
19 #include <asm/uaccess.h>
30 spinlock_t gfs2_sys_margs_lock;
32 static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
34 return snprintf(buf, PAGE_SIZE, "%u:%u\n",
35 MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
38 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
40 return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
43 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
47 mutex_lock(&sdp->sd_freeze_lock);
48 count = sdp->sd_freeze_count;
49 mutex_unlock(&sdp->sd_freeze_lock);
51 return snprintf(buf, PAGE_SIZE, "%u\n", count);
54 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
58 int n = simple_strtol(buf, NULL, 0);
60 if (!capable(CAP_SYS_ADMIN))
65 gfs2_unfreeze_fs(sdp);
68 error = gfs2_freeze_fs(sdp);
75 fs_warn(sdp, "freeze %d error %d", n, error);
80 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
82 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
83 return snprintf(buf, PAGE_SIZE, "%u\n", b);
86 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
88 if (!capable(CAP_SYS_ADMIN))
91 if (simple_strtol(buf, NULL, 0) != 1)
95 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
100 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
103 if (!capable(CAP_SYS_ADMIN))
106 if (simple_strtol(buf, NULL, 0) != 1)
109 gfs2_statfs_sync(sdp);
113 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
116 if (!capable(CAP_SYS_ADMIN))
119 if (simple_strtol(buf, NULL, 0) != 1)
122 gfs2_quota_sync(sdp);
126 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
131 if (!capable(CAP_SYS_ADMIN))
134 id = simple_strtoul(buf, NULL, 0);
136 gfs2_quota_refresh(sdp, 1, id);
140 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
145 if (!capable(CAP_SYS_ADMIN))
148 id = simple_strtoul(buf, NULL, 0);
150 gfs2_quota_refresh(sdp, 0, id);
155 struct attribute attr;
156 ssize_t (*show)(struct gfs2_sbd *, char *);
157 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
160 #define GFS2_ATTR(name, mode, show, store) \
161 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
163 GFS2_ATTR(id, 0444, id_show, NULL);
164 GFS2_ATTR(fsname, 0444, fsname_show, NULL);
165 GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
166 GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
167 GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
168 GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
169 GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
170 GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
172 static struct attribute *gfs2_attrs[] = {
174 &gfs2_attr_fsname.attr,
175 &gfs2_attr_freeze.attr,
176 &gfs2_attr_withdraw.attr,
177 &gfs2_attr_statfs_sync.attr,
178 &gfs2_attr_quota_sync.attr,
179 &gfs2_attr_quota_refresh_user.attr,
180 &gfs2_attr_quota_refresh_group.attr,
184 static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
187 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
188 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
189 return a->show ? a->show(sdp, buf) : 0;
192 static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
193 const char *buf, size_t len)
195 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
196 struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
197 return a->store ? a->store(sdp, buf, len) : len;
200 static struct sysfs_ops gfs2_attr_ops = {
201 .show = gfs2_attr_show,
202 .store = gfs2_attr_store,
205 static struct kobj_type gfs2_ktype = {
206 .default_attrs = gfs2_attrs,
207 .sysfs_ops = &gfs2_attr_ops,
210 static struct kset *gfs2_kset;
213 * display struct lm_lockstruct fields
216 struct lockstruct_attr {
217 struct attribute attr;
218 ssize_t (*show)(struct gfs2_sbd *, char *);
221 #define LOCKSTRUCT_ATTR(name, fmt) \
222 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
224 return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_lockstruct.ls_##name); \
226 static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
228 LOCKSTRUCT_ATTR(jid, "%u\n");
229 LOCKSTRUCT_ATTR(first, "%u\n");
230 LOCKSTRUCT_ATTR(lvb_size, "%u\n");
231 LOCKSTRUCT_ATTR(flags, "%d\n");
233 static struct attribute *lockstruct_attrs[] = {
234 &lockstruct_attr_jid.attr,
235 &lockstruct_attr_first.attr,
236 &lockstruct_attr_lvb_size.attr,
237 &lockstruct_attr_flags.attr,
242 * display struct gfs2_args fields
246 struct attribute attr;
247 ssize_t (*show)(struct gfs2_sbd *, char *);
250 #define ARGS_ATTR(name, fmt) \
251 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
253 return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_args.ar_##name); \
255 static struct args_attr args_attr_##name = __ATTR_RO(name)
257 ARGS_ATTR(lockproto, "%s\n");
258 ARGS_ATTR(locktable, "%s\n");
259 ARGS_ATTR(hostdata, "%s\n");
260 ARGS_ATTR(spectator, "%d\n");
261 ARGS_ATTR(ignore_local_fs, "%d\n");
262 ARGS_ATTR(localcaching, "%d\n");
263 ARGS_ATTR(localflocks, "%d\n");
264 ARGS_ATTR(debug, "%d\n");
265 ARGS_ATTR(upgrade, "%d\n");
266 ARGS_ATTR(posix_acl, "%d\n");
267 ARGS_ATTR(quota, "%u\n");
268 ARGS_ATTR(suiddir, "%d\n");
269 ARGS_ATTR(data, "%d\n");
271 static struct attribute *args_attrs[] = {
272 &args_attr_lockproto.attr,
273 &args_attr_locktable.attr,
274 &args_attr_hostdata.attr,
275 &args_attr_spectator.attr,
276 &args_attr_ignore_local_fs.attr,
277 &args_attr_localcaching.attr,
278 &args_attr_localflocks.attr,
279 &args_attr_debug.attr,
280 &args_attr_upgrade.attr,
281 &args_attr_posix_acl.attr,
282 &args_attr_quota.attr,
283 &args_attr_suiddir.attr,
284 &args_attr_data.attr,
289 * get and set struct gfs2_tune fields
292 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
294 return snprintf(buf, PAGE_SIZE, "%u %u\n",
295 sdp->sd_tune.gt_quota_scale_num,
296 sdp->sd_tune.gt_quota_scale_den);
299 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
302 struct gfs2_tune *gt = &sdp->sd_tune;
305 if (!capable(CAP_SYS_ADMIN))
308 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
311 spin_lock(>->gt_spin);
312 gt->gt_quota_scale_num = x;
313 gt->gt_quota_scale_den = y;
314 spin_unlock(>->gt_spin);
318 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
319 int check_zero, const char *buf, size_t len)
321 struct gfs2_tune *gt = &sdp->sd_tune;
324 if (!capable(CAP_SYS_ADMIN))
327 x = simple_strtoul(buf, NULL, 0);
329 if (check_zero && !x)
332 spin_lock(>->gt_spin);
334 spin_unlock(>->gt_spin);
339 struct attribute attr;
340 ssize_t (*show)(struct gfs2_sbd *, char *);
341 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
344 #define TUNE_ATTR_3(name, show, store) \
345 static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
347 #define TUNE_ATTR_2(name, store) \
348 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
350 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
352 TUNE_ATTR_3(name, name##_show, store)
354 #define TUNE_ATTR(name, check_zero) \
355 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
357 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
359 TUNE_ATTR_2(name, name##_store)
361 #define TUNE_ATTR_DAEMON(name, process) \
362 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
364 ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \
365 wake_up_process(sdp->sd_##process); \
368 TUNE_ATTR_2(name, name##_store)
370 TUNE_ATTR(incore_log_blocks, 0);
371 TUNE_ATTR(log_flush_secs, 0);
372 TUNE_ATTR(quota_warn_period, 0);
373 TUNE_ATTR(quota_quantum, 0);
374 TUNE_ATTR(max_readahead, 0);
375 TUNE_ATTR(complain_secs, 0);
376 TUNE_ATTR(statfs_slow, 0);
377 TUNE_ATTR(new_files_jdata, 0);
378 TUNE_ATTR(quota_simul_sync, 1);
379 TUNE_ATTR(quota_cache_secs, 1);
380 TUNE_ATTR(stall_secs, 1);
381 TUNE_ATTR(statfs_quantum, 1);
382 TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
383 TUNE_ATTR_DAEMON(logd_secs, logd_process);
384 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
386 static struct attribute *tune_attrs[] = {
387 &tune_attr_incore_log_blocks.attr,
388 &tune_attr_log_flush_secs.attr,
389 &tune_attr_quota_warn_period.attr,
390 &tune_attr_quota_quantum.attr,
391 &tune_attr_max_readahead.attr,
392 &tune_attr_complain_secs.attr,
393 &tune_attr_statfs_slow.attr,
394 &tune_attr_quota_simul_sync.attr,
395 &tune_attr_quota_cache_secs.attr,
396 &tune_attr_stall_secs.attr,
397 &tune_attr_statfs_quantum.attr,
398 &tune_attr_recoverd_secs.attr,
399 &tune_attr_logd_secs.attr,
400 &tune_attr_quota_scale.attr,
401 &tune_attr_new_files_jdata.attr,
405 static struct attribute_group lockstruct_group = {
406 .name = "lockstruct",
407 .attrs = lockstruct_attrs,
410 static struct attribute_group args_group = {
415 static struct attribute_group tune_group = {
420 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
424 sdp->sd_kobj.kset = gfs2_kset;
425 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
426 "%s", sdp->sd_table_name);
430 error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
434 error = sysfs_create_group(&sdp->sd_kobj, &args_group);
436 goto fail_lockstruct;
438 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
442 kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
446 sysfs_remove_group(&sdp->sd_kobj, &args_group);
448 sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
450 kobject_put(&sdp->sd_kobj);
452 fs_err(sdp, "error %d adding sysfs files", error);
456 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
458 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
459 sysfs_remove_group(&sdp->sd_kobj, &args_group);
460 sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
461 kobject_put(&sdp->sd_kobj);
464 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
465 struct kobj_uevent_env *env)
467 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
468 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
469 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
473 static struct kset_uevent_ops gfs2_uevent_ops = {
474 .uevent = gfs2_uevent,
478 int gfs2_sys_init(void)
480 gfs2_sys_margs = NULL;
481 spin_lock_init(&gfs2_sys_margs_lock);
482 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
488 void gfs2_sys_uninit(void)
490 kfree(gfs2_sys_margs);
491 kset_unregister(gfs2_kset);