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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>
20
21#include "gfs2.h"
22#include "incore.h"
23#include "sys.h"
24#include "super.h"
25#include "glock.h"
26#include "quota.h"
27#include "util.h"
28
29char *gfs2_sys_margs;
30spinlock_t gfs2_sys_margs_lock;
31
32static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
33{
34 return snprintf(buf, PAGE_SIZE, "%u:%u\n",
35 MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
36}
37
38static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
39{
40 return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
41}
42
43static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
44{
45 unsigned int count;
46
47 mutex_lock(&sdp->sd_freeze_lock);
48 count = sdp->sd_freeze_count;
49 mutex_unlock(&sdp->sd_freeze_lock);
50
51 return snprintf(buf, PAGE_SIZE, "%u\n", count);
52}
53
54static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
55{
56 ssize_t ret = len;
57 int error = 0;
58 int n = simple_strtol(buf, NULL, 0);
59
60 if (!capable(CAP_SYS_ADMIN))
61 return -EACCES;
62
63 switch (n) {
64 case 0:
65 gfs2_unfreeze_fs(sdp);
66 break;
67 case 1:
68 error = gfs2_freeze_fs(sdp);
69 break;
70 default:
71 ret = -EINVAL;
72 }
73
74 if (error)
75 fs_warn(sdp, "freeze %d error %d", n, error);
76
77 return ret;
78}
79
80static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
81{
82 unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
83 return snprintf(buf, PAGE_SIZE, "%u\n", b);
84}
85
86static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
87{
88 if (!capable(CAP_SYS_ADMIN))
89 return -EACCES;
90
91 if (simple_strtol(buf, NULL, 0) != 1)
92 return -EINVAL;
93
94 gfs2_lm_withdraw(sdp,
95 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
96 sdp->sd_fsname);
97 return len;
98}
99
100static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
101 size_t len)
102{
103 if (!capable(CAP_SYS_ADMIN))
104 return -EACCES;
105
106 if (simple_strtol(buf, NULL, 0) != 1)
107 return -EINVAL;
108
109 gfs2_statfs_sync(sdp);
110 return len;
111}
112
113static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
114 size_t len)
115{
116 if (!capable(CAP_SYS_ADMIN))
117 return -EACCES;
118
119 if (simple_strtol(buf, NULL, 0) != 1)
120 return -EINVAL;
121
122 gfs2_quota_sync(sdp);
123 return len;
124}
125
126static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
127 size_t len)
128{
129 u32 id;
130
131 if (!capable(CAP_SYS_ADMIN))
132 return -EACCES;
133
134 id = simple_strtoul(buf, NULL, 0);
135
136 gfs2_quota_refresh(sdp, 1, id);
137 return len;
138}
139
140static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
141 size_t len)
142{
143 u32 id;
144
145 if (!capable(CAP_SYS_ADMIN))
146 return -EACCES;
147
148 id = simple_strtoul(buf, NULL, 0);
149
150 gfs2_quota_refresh(sdp, 0, id);
151 return len;
152}
153
154struct gfs2_attr {
155 struct attribute attr;
156 ssize_t (*show)(struct gfs2_sbd *, char *);
157 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
158};
159
160#define GFS2_ATTR(name, mode, show, store) \
161static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
162
163GFS2_ATTR(id, 0444, id_show, NULL);
164GFS2_ATTR(fsname, 0444, fsname_show, NULL);
165GFS2_ATTR(freeze, 0644, freeze_show, freeze_store);
166GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
167GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store);
168GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store);
169GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store);
170GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store);
171
172static struct attribute *gfs2_attrs[] = {
173 &gfs2_attr_id.attr,
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,
181 NULL,
182};
183
184static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
185 char *buf)
186{
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;
190}
191
192static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
193 const char *buf, size_t len)
194{
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;
198}
199
200static struct sysfs_ops gfs2_attr_ops = {
201 .show = gfs2_attr_show,
202 .store = gfs2_attr_store,
203};
204
205static struct kobj_type gfs2_ktype = {
206 .default_attrs = gfs2_attrs,
207 .sysfs_ops = &gfs2_attr_ops,
208};
209
210static struct kset *gfs2_kset;
211
212
213
214
215
216struct lockstruct_attr {
217 struct attribute attr;
218 ssize_t (*show)(struct gfs2_sbd *, char *);
219};
220
221#define LOCKSTRUCT_ATTR(name, fmt) \
222static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
223{ \
224 return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_lockstruct.ls_##name); \
225} \
226static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
227
228LOCKSTRUCT_ATTR(jid, "%u\n");
229LOCKSTRUCT_ATTR(first, "%u\n");
230LOCKSTRUCT_ATTR(lvb_size, "%u\n");
231LOCKSTRUCT_ATTR(flags, "%d\n");
232
233static 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,
238 NULL,
239};
240
241
242
243
244
245struct args_attr {
246 struct attribute attr;
247 ssize_t (*show)(struct gfs2_sbd *, char *);
248};
249
250#define ARGS_ATTR(name, fmt) \
251static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
252{ \
253 return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_args.ar_##name); \
254} \
255static struct args_attr args_attr_##name = __ATTR_RO(name)
256
257ARGS_ATTR(lockproto, "%s\n");
258ARGS_ATTR(locktable, "%s\n");
259ARGS_ATTR(hostdata, "%s\n");
260ARGS_ATTR(spectator, "%d\n");
261ARGS_ATTR(ignore_local_fs, "%d\n");
262ARGS_ATTR(localcaching, "%d\n");
263ARGS_ATTR(localflocks, "%d\n");
264ARGS_ATTR(debug, "%d\n");
265ARGS_ATTR(upgrade, "%d\n");
266ARGS_ATTR(num_glockd, "%u\n");
267ARGS_ATTR(posix_acl, "%d\n");
268ARGS_ATTR(quota, "%u\n");
269ARGS_ATTR(suiddir, "%d\n");
270ARGS_ATTR(data, "%d\n");
271
272static struct attribute *args_attrs[] = {
273 &args_attr_lockproto.attr,
274 &args_attr_locktable.attr,
275 &args_attr_hostdata.attr,
276 &args_attr_spectator.attr,
277 &args_attr_ignore_local_fs.attr,
278 &args_attr_localcaching.attr,
279 &args_attr_localflocks.attr,
280 &args_attr_debug.attr,
281 &args_attr_upgrade.attr,
282 &args_attr_num_glockd.attr,
283 &args_attr_posix_acl.attr,
284 &args_attr_quota.attr,
285 &args_attr_suiddir.attr,
286 &args_attr_data.attr,
287 NULL,
288};
289
290
291
292
293
294struct counters_attr {
295 struct attribute attr;
296 ssize_t (*show)(struct gfs2_sbd *, char *);
297};
298
299#define COUNTERS_ATTR(name, fmt) \
300static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
301{ \
302 return snprintf(buf, PAGE_SIZE, fmt, \
303 (unsigned int)atomic_read(&sdp->sd_##name)); \
304} \
305static struct counters_attr counters_attr_##name = __ATTR_RO(name)
306
307COUNTERS_ATTR(reclaimed, "%u\n");
308
309static struct attribute *counters_attrs[] = {
310 &counters_attr_reclaimed.attr,
311 NULL,
312};
313
314
315
316
317
318static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
319{
320 return snprintf(buf, PAGE_SIZE, "%u %u\n",
321 sdp->sd_tune.gt_quota_scale_num,
322 sdp->sd_tune.gt_quota_scale_den);
323}
324
325static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
326 size_t len)
327{
328 struct gfs2_tune *gt = &sdp->sd_tune;
329 unsigned int x, y;
330
331 if (!capable(CAP_SYS_ADMIN))
332 return -EACCES;
333
334 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
335 return -EINVAL;
336
337 spin_lock(>->gt_spin);
338 gt->gt_quota_scale_num = x;
339 gt->gt_quota_scale_den = y;
340 spin_unlock(>->gt_spin);
341 return len;
342}
343
344static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
345 int check_zero, const char *buf, size_t len)
346{
347 struct gfs2_tune *gt = &sdp->sd_tune;
348 unsigned int x;
349
350 if (!capable(CAP_SYS_ADMIN))
351 return -EACCES;
352
353 x = simple_strtoul(buf, NULL, 0);
354
355 if (check_zero && !x)
356 return -EINVAL;
357
358 spin_lock(>->gt_spin);
359 *field = x;
360 spin_unlock(>->gt_spin);
361 return len;
362}
363
364struct tune_attr {
365 struct attribute attr;
366 ssize_t (*show)(struct gfs2_sbd *, char *);
367 ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
368};
369
370#define TUNE_ATTR_3(name, show, store) \
371static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
372
373#define TUNE_ATTR_2(name, store) \
374static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \
375{ \
376 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \
377} \
378TUNE_ATTR_3(name, name##_show, store)
379
380#define TUNE_ATTR(name, check_zero) \
381static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
382{ \
383 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \
384} \
385TUNE_ATTR_2(name, name##_store)
386
387#define TUNE_ATTR_DAEMON(name, process) \
388static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
389{ \
390 ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \
391 wake_up_process(sdp->sd_##process); \
392 return r; \
393} \
394TUNE_ATTR_2(name, name##_store)
395
396TUNE_ATTR(demote_secs, 0);
397TUNE_ATTR(incore_log_blocks, 0);
398TUNE_ATTR(log_flush_secs, 0);
399TUNE_ATTR(quota_warn_period, 0);
400TUNE_ATTR(quota_quantum, 0);
401TUNE_ATTR(max_readahead, 0);
402TUNE_ATTR(complain_secs, 0);
403TUNE_ATTR(statfs_slow, 0);
404TUNE_ATTR(new_files_jdata, 0);
405TUNE_ATTR(quota_simul_sync, 1);
406TUNE_ATTR(quota_cache_secs, 1);
407TUNE_ATTR(stall_secs, 1);
408TUNE_ATTR(statfs_quantum, 1);
409TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
410TUNE_ATTR_DAEMON(logd_secs, logd_process);
411TUNE_ATTR_DAEMON(quotad_secs, quotad_process);
412TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
413
414static struct attribute *tune_attrs[] = {
415 &tune_attr_demote_secs.attr,
416 &tune_attr_incore_log_blocks.attr,
417 &tune_attr_log_flush_secs.attr,
418 &tune_attr_quota_warn_period.attr,
419 &tune_attr_quota_quantum.attr,
420 &tune_attr_max_readahead.attr,
421 &tune_attr_complain_secs.attr,
422 &tune_attr_statfs_slow.attr,
423 &tune_attr_quota_simul_sync.attr,
424 &tune_attr_quota_cache_secs.attr,
425 &tune_attr_stall_secs.attr,
426 &tune_attr_statfs_quantum.attr,
427 &tune_attr_recoverd_secs.attr,
428 &tune_attr_logd_secs.attr,
429 &tune_attr_quotad_secs.attr,
430 &tune_attr_quota_scale.attr,
431 &tune_attr_new_files_jdata.attr,
432 NULL,
433};
434
435static struct attribute_group lockstruct_group = {
436 .name = "lockstruct",
437 .attrs = lockstruct_attrs,
438};
439
440static struct attribute_group counters_group = {
441 .name = "counters",
442 .attrs = counters_attrs,
443};
444
445static struct attribute_group args_group = {
446 .name = "args",
447 .attrs = args_attrs,
448};
449
450static struct attribute_group tune_group = {
451 .name = "tune",
452 .attrs = tune_attrs,
453};
454
455int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
456{
457 int error;
458
459 sdp->sd_kobj.kset = gfs2_kset;
460 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
461 "%s", sdp->sd_table_name);
462 if (error)
463 goto fail;
464
465 error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
466 if (error)
467 goto fail_reg;
468
469 error = sysfs_create_group(&sdp->sd_kobj, &counters_group);
470 if (error)
471 goto fail_lockstruct;
472
473 error = sysfs_create_group(&sdp->sd_kobj, &args_group);
474 if (error)
475 goto fail_counters;
476
477 error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
478 if (error)
479 goto fail_args;
480
481 kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
482 return 0;
483
484fail_args:
485 sysfs_remove_group(&sdp->sd_kobj, &args_group);
486fail_counters:
487 sysfs_remove_group(&sdp->sd_kobj, &counters_group);
488fail_lockstruct:
489 sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
490fail_reg:
491 kobject_put(&sdp->sd_kobj);
492fail:
493 fs_err(sdp, "error %d adding sysfs files", error);
494 return error;
495}
496
497void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
498{
499 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
500 sysfs_remove_group(&sdp->sd_kobj, &args_group);
501 sysfs_remove_group(&sdp->sd_kobj, &counters_group);
502 sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
503 kobject_put(&sdp->sd_kobj);
504}
505
506int gfs2_sys_init(void)
507{
508 gfs2_sys_margs = NULL;
509 spin_lock_init(&gfs2_sys_margs_lock);
510 gfs2_kset = kset_create_and_add("gfs2", NULL, fs_kobj);
511 if (!gfs2_kset)
512 return -ENOMEM;
513 return 0;
514}
515
516void gfs2_sys_uninit(void)
517{
518 kfree(gfs2_sys_margs);
519 kset_unregister(gfs2_kset);
520}
521
522
