Commit | Line | Data |
---|---|---|
b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
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> | |
5c676f6d | 17 | #include <linux/gfs2_ondisk.h> |
7d308590 | 18 | #include <linux/lm_interface.h> |
b3b94faa DT |
19 | #include <asm/uaccess.h> |
20 | ||
21 | #include "gfs2.h" | |
5c676f6d | 22 | #include "incore.h" |
b3b94faa DT |
23 | #include "sys.h" |
24 | #include "super.h" | |
25 | #include "glock.h" | |
26 | #include "quota.h" | |
5c676f6d | 27 | #include "util.h" |
b3b94faa | 28 | |
b3b94faa DT |
29 | static ssize_t id_show(struct gfs2_sbd *sdp, char *buf) |
30 | { | |
c7227e46 BP |
31 | return snprintf(buf, PAGE_SIZE, "%u:%u\n", |
32 | MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev)); | |
b3b94faa DT |
33 | } |
34 | ||
35 | static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf) | |
36 | { | |
3204a6c0 | 37 | return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname); |
b3b94faa DT |
38 | } |
39 | ||
40 | static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf) | |
41 | { | |
42 | unsigned int count; | |
43 | ||
f55ab26a | 44 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa | 45 | count = sdp->sd_freeze_count; |
f55ab26a | 46 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa | 47 | |
3204a6c0 | 48 | return snprintf(buf, PAGE_SIZE, "%u\n", count); |
b3b94faa DT |
49 | } |
50 | ||
51 | static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
52 | { | |
53 | ssize_t ret = len; | |
54 | int error = 0; | |
55 | int n = simple_strtol(buf, NULL, 0); | |
56 | ||
57 | if (!capable(CAP_SYS_ADMIN)) | |
58 | return -EACCES; | |
59 | ||
60 | switch (n) { | |
61 | case 0: | |
62 | gfs2_unfreeze_fs(sdp); | |
63 | break; | |
64 | case 1: | |
65 | error = gfs2_freeze_fs(sdp); | |
66 | break; | |
67 | default: | |
68 | ret = -EINVAL; | |
69 | } | |
70 | ||
71 | if (error) | |
72 | fs_warn(sdp, "freeze %d error %d", n, error); | |
73 | ||
74 | return ret; | |
75 | } | |
76 | ||
77 | static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf) | |
78 | { | |
79 | unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags); | |
3204a6c0 | 80 | return snprintf(buf, PAGE_SIZE, "%u\n", b); |
b3b94faa DT |
81 | } |
82 | ||
83 | static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
84 | { | |
85 | if (!capable(CAP_SYS_ADMIN)) | |
86 | return -EACCES; | |
87 | ||
88 | if (simple_strtol(buf, NULL, 0) != 1) | |
89 | return -EINVAL; | |
90 | ||
91 | gfs2_lm_withdraw(sdp, | |
92 | "GFS2: fsid=%s: withdrawing from cluster at user's request\n", | |
93 | sdp->sd_fsname); | |
94 | return len; | |
95 | } | |
96 | ||
97 | static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf, | |
98 | size_t len) | |
99 | { | |
100 | if (!capable(CAP_SYS_ADMIN)) | |
101 | return -EACCES; | |
102 | ||
103 | if (simple_strtol(buf, NULL, 0) != 1) | |
104 | return -EINVAL; | |
105 | ||
106 | gfs2_statfs_sync(sdp); | |
107 | return len; | |
108 | } | |
109 | ||
b3b94faa DT |
110 | static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf, |
111 | size_t len) | |
112 | { | |
113 | if (!capable(CAP_SYS_ADMIN)) | |
114 | return -EACCES; | |
115 | ||
116 | if (simple_strtol(buf, NULL, 0) != 1) | |
117 | return -EINVAL; | |
118 | ||
119 | gfs2_quota_sync(sdp); | |
120 | return len; | |
121 | } | |
122 | ||
123 | static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf, | |
124 | size_t len) | |
125 | { | |
cd915493 | 126 | u32 id; |
b3b94faa DT |
127 | |
128 | if (!capable(CAP_SYS_ADMIN)) | |
129 | return -EACCES; | |
130 | ||
131 | id = simple_strtoul(buf, NULL, 0); | |
132 | ||
133 | gfs2_quota_refresh(sdp, 1, id); | |
134 | return len; | |
135 | } | |
136 | ||
137 | static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, | |
138 | size_t len) | |
139 | { | |
cd915493 | 140 | u32 id; |
b3b94faa DT |
141 | |
142 | if (!capable(CAP_SYS_ADMIN)) | |
143 | return -EACCES; | |
144 | ||
145 | id = simple_strtoul(buf, NULL, 0); | |
146 | ||
147 | gfs2_quota_refresh(sdp, 0, id); | |
148 | return len; | |
149 | } | |
150 | ||
151 | struct gfs2_attr { | |
152 | struct attribute attr; | |
153 | ssize_t (*show)(struct gfs2_sbd *, char *); | |
154 | ssize_t (*store)(struct gfs2_sbd *, const char *, size_t); | |
155 | }; | |
156 | ||
157 | #define GFS2_ATTR(name, mode, show, store) \ | |
158 | static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) | |
159 | ||
160 | GFS2_ATTR(id, 0444, id_show, NULL); | |
161 | GFS2_ATTR(fsname, 0444, fsname_show, NULL); | |
162 | GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); | |
b3b94faa DT |
163 | GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store); |
164 | GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store); | |
165 | GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store); | |
166 | GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store); | |
167 | GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store); | |
168 | ||
169 | static struct attribute *gfs2_attrs[] = { | |
170 | &gfs2_attr_id.attr, | |
171 | &gfs2_attr_fsname.attr, | |
172 | &gfs2_attr_freeze.attr, | |
b3b94faa DT |
173 | &gfs2_attr_withdraw.attr, |
174 | &gfs2_attr_statfs_sync.attr, | |
175 | &gfs2_attr_quota_sync.attr, | |
176 | &gfs2_attr_quota_refresh_user.attr, | |
177 | &gfs2_attr_quota_refresh_group.attr, | |
178 | NULL, | |
179 | }; | |
180 | ||
181 | static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr, | |
182 | char *buf) | |
183 | { | |
184 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
185 | struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr); | |
186 | return a->show ? a->show(sdp, buf) : 0; | |
187 | } | |
188 | ||
189 | static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr, | |
190 | const char *buf, size_t len) | |
191 | { | |
192 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
193 | struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr); | |
194 | return a->store ? a->store(sdp, buf, len) : len; | |
195 | } | |
196 | ||
197 | static struct sysfs_ops gfs2_attr_ops = { | |
198 | .show = gfs2_attr_show, | |
199 | .store = gfs2_attr_store, | |
200 | }; | |
201 | ||
202 | static struct kobj_type gfs2_ktype = { | |
203 | .default_attrs = gfs2_attrs, | |
204 | .sysfs_ops = &gfs2_attr_ops, | |
205 | }; | |
206 | ||
9bec101a | 207 | static struct kset *gfs2_kset; |
b3b94faa DT |
208 | |
209 | /* | |
210 | * display struct lm_lockstruct fields | |
211 | */ | |
212 | ||
213 | struct lockstruct_attr { | |
214 | struct attribute attr; | |
215 | ssize_t (*show)(struct gfs2_sbd *, char *); | |
216 | }; | |
217 | ||
218 | #define LOCKSTRUCT_ATTR(name, fmt) \ | |
219 | static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ | |
220 | { \ | |
3204a6c0 | 221 | return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_lockstruct.ls_##name); \ |
b3b94faa DT |
222 | } \ |
223 | static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name) | |
224 | ||
225 | LOCKSTRUCT_ATTR(jid, "%u\n"); | |
226 | LOCKSTRUCT_ATTR(first, "%u\n"); | |
227 | LOCKSTRUCT_ATTR(lvb_size, "%u\n"); | |
228 | LOCKSTRUCT_ATTR(flags, "%d\n"); | |
229 | ||
230 | static struct attribute *lockstruct_attrs[] = { | |
231 | &lockstruct_attr_jid.attr, | |
232 | &lockstruct_attr_first.attr, | |
233 | &lockstruct_attr_lvb_size.attr, | |
234 | &lockstruct_attr_flags.attr, | |
ea67eedb | 235 | NULL, |
b3b94faa DT |
236 | }; |
237 | ||
238 | /* | |
239 | * display struct gfs2_args fields | |
240 | */ | |
241 | ||
242 | struct args_attr { | |
243 | struct attribute attr; | |
244 | ssize_t (*show)(struct gfs2_sbd *, char *); | |
245 | }; | |
246 | ||
247 | #define ARGS_ATTR(name, fmt) \ | |
248 | static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ | |
249 | { \ | |
3204a6c0 | 250 | return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_args.ar_##name); \ |
b3b94faa DT |
251 | } \ |
252 | static struct args_attr args_attr_##name = __ATTR_RO(name) | |
253 | ||
254 | ARGS_ATTR(lockproto, "%s\n"); | |
255 | ARGS_ATTR(locktable, "%s\n"); | |
256 | ARGS_ATTR(hostdata, "%s\n"); | |
257 | ARGS_ATTR(spectator, "%d\n"); | |
258 | ARGS_ATTR(ignore_local_fs, "%d\n"); | |
259 | ARGS_ATTR(localcaching, "%d\n"); | |
260 | ARGS_ATTR(localflocks, "%d\n"); | |
261 | ARGS_ATTR(debug, "%d\n"); | |
262 | ARGS_ATTR(upgrade, "%d\n"); | |
b3b94faa DT |
263 | ARGS_ATTR(posix_acl, "%d\n"); |
264 | ARGS_ATTR(quota, "%u\n"); | |
265 | ARGS_ATTR(suiddir, "%d\n"); | |
266 | ARGS_ATTR(data, "%d\n"); | |
267 | ||
b3b94faa DT |
268 | static struct attribute *args_attrs[] = { |
269 | &args_attr_lockproto.attr, | |
270 | &args_attr_locktable.attr, | |
271 | &args_attr_hostdata.attr, | |
272 | &args_attr_spectator.attr, | |
273 | &args_attr_ignore_local_fs.attr, | |
274 | &args_attr_localcaching.attr, | |
275 | &args_attr_localflocks.attr, | |
276 | &args_attr_debug.attr, | |
277 | &args_attr_upgrade.attr, | |
b3b94faa DT |
278 | &args_attr_posix_acl.attr, |
279 | &args_attr_quota.attr, | |
280 | &args_attr_suiddir.attr, | |
281 | &args_attr_data.attr, | |
ea67eedb | 282 | NULL, |
b3b94faa DT |
283 | }; |
284 | ||
b3b94faa DT |
285 | /* |
286 | * get and set struct gfs2_tune fields | |
287 | */ | |
288 | ||
289 | static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) | |
290 | { | |
3204a6c0 DT |
291 | return snprintf(buf, PAGE_SIZE, "%u %u\n", |
292 | sdp->sd_tune.gt_quota_scale_num, | |
293 | sdp->sd_tune.gt_quota_scale_den); | |
b3b94faa DT |
294 | } |
295 | ||
296 | static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, | |
297 | size_t len) | |
298 | { | |
299 | struct gfs2_tune *gt = &sdp->sd_tune; | |
300 | unsigned int x, y; | |
301 | ||
302 | if (!capable(CAP_SYS_ADMIN)) | |
303 | return -EACCES; | |
304 | ||
305 | if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) | |
306 | return -EINVAL; | |
307 | ||
308 | spin_lock(>->gt_spin); | |
309 | gt->gt_quota_scale_num = x; | |
310 | gt->gt_quota_scale_den = y; | |
311 | spin_unlock(>->gt_spin); | |
312 | return len; | |
313 | } | |
314 | ||
315 | static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, | |
316 | int check_zero, const char *buf, size_t len) | |
317 | { | |
318 | struct gfs2_tune *gt = &sdp->sd_tune; | |
319 | unsigned int x; | |
320 | ||
321 | if (!capable(CAP_SYS_ADMIN)) | |
322 | return -EACCES; | |
323 | ||
324 | x = simple_strtoul(buf, NULL, 0); | |
325 | ||
326 | if (check_zero && !x) | |
327 | return -EINVAL; | |
328 | ||
329 | spin_lock(>->gt_spin); | |
330 | *field = x; | |
331 | spin_unlock(>->gt_spin); | |
332 | return len; | |
333 | } | |
334 | ||
335 | struct tune_attr { | |
336 | struct attribute attr; | |
337 | ssize_t (*show)(struct gfs2_sbd *, char *); | |
338 | ssize_t (*store)(struct gfs2_sbd *, const char *, size_t); | |
339 | }; | |
340 | ||
341 | #define TUNE_ATTR_3(name, show, store) \ | |
342 | static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store) | |
343 | ||
344 | #define TUNE_ATTR_2(name, store) \ | |
345 | static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ | |
346 | { \ | |
3204a6c0 | 347 | return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ |
b3b94faa DT |
348 | } \ |
349 | TUNE_ATTR_3(name, name##_show, store) | |
350 | ||
351 | #define TUNE_ATTR(name, check_zero) \ | |
352 | static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ | |
353 | { \ | |
354 | return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ | |
355 | } \ | |
356 | TUNE_ATTR_2(name, name##_store) | |
357 | ||
358 | #define TUNE_ATTR_DAEMON(name, process) \ | |
359 | static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ | |
360 | { \ | |
361 | ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len); \ | |
362 | wake_up_process(sdp->sd_##process); \ | |
363 | return r; \ | |
364 | } \ | |
365 | TUNE_ATTR_2(name, name##_store) | |
366 | ||
b3b94faa DT |
367 | TUNE_ATTR(incore_log_blocks, 0); |
368 | TUNE_ATTR(log_flush_secs, 0); | |
b3b94faa DT |
369 | TUNE_ATTR(quota_warn_period, 0); |
370 | TUNE_ATTR(quota_quantum, 0); | |
b3b94faa DT |
371 | TUNE_ATTR(max_readahead, 0); |
372 | TUNE_ATTR(complain_secs, 0); | |
b3b94faa DT |
373 | TUNE_ATTR(statfs_slow, 0); |
374 | TUNE_ATTR(new_files_jdata, 0); | |
b3b94faa DT |
375 | TUNE_ATTR(quota_simul_sync, 1); |
376 | TUNE_ATTR(quota_cache_secs, 1); | |
b3b94faa | 377 | TUNE_ATTR(stall_secs, 1); |
b3b94faa | 378 | TUNE_ATTR(statfs_quantum, 1); |
b3b94faa DT |
379 | TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process); |
380 | TUNE_ATTR_DAEMON(logd_secs, logd_process); | |
b3b94faa DT |
381 | TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); |
382 | ||
383 | static struct attribute *tune_attrs[] = { | |
b3b94faa DT |
384 | &tune_attr_incore_log_blocks.attr, |
385 | &tune_attr_log_flush_secs.attr, | |
b3b94faa DT |
386 | &tune_attr_quota_warn_period.attr, |
387 | &tune_attr_quota_quantum.attr, | |
b3b94faa DT |
388 | &tune_attr_max_readahead.attr, |
389 | &tune_attr_complain_secs.attr, | |
b3b94faa DT |
390 | &tune_attr_statfs_slow.attr, |
391 | &tune_attr_quota_simul_sync.attr, | |
392 | &tune_attr_quota_cache_secs.attr, | |
b3b94faa | 393 | &tune_attr_stall_secs.attr, |
b3b94faa | 394 | &tune_attr_statfs_quantum.attr, |
b3b94faa DT |
395 | &tune_attr_recoverd_secs.attr, |
396 | &tune_attr_logd_secs.attr, | |
b3b94faa DT |
397 | &tune_attr_quota_scale.attr, |
398 | &tune_attr_new_files_jdata.attr, | |
ea67eedb | 399 | NULL, |
b3b94faa DT |
400 | }; |
401 | ||
402 | static struct attribute_group lockstruct_group = { | |
403 | .name = "lockstruct", | |
ea67eedb | 404 | .attrs = lockstruct_attrs, |
b3b94faa DT |
405 | }; |
406 | ||
b3b94faa DT |
407 | static struct attribute_group args_group = { |
408 | .name = "args", | |
ea67eedb | 409 | .attrs = args_attrs, |
b3b94faa DT |
410 | }; |
411 | ||
412 | static struct attribute_group tune_group = { | |
413 | .name = "tune", | |
ea67eedb | 414 | .attrs = tune_attrs, |
b3b94faa DT |
415 | }; |
416 | ||
417 | int gfs2_sys_fs_add(struct gfs2_sbd *sdp) | |
418 | { | |
419 | int error; | |
420 | ||
9bec101a | 421 | sdp->sd_kobj.kset = gfs2_kset; |
901195ed GKH |
422 | error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, |
423 | "%s", sdp->sd_table_name); | |
b3b94faa DT |
424 | if (error) |
425 | goto fail; | |
426 | ||
427 | error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group); | |
428 | if (error) | |
429 | goto fail_reg; | |
430 | ||
b3b94faa DT |
431 | error = sysfs_create_group(&sdp->sd_kobj, &args_group); |
432 | if (error) | |
97cc1025 | 433 | goto fail_lockstruct; |
b3b94faa DT |
434 | |
435 | error = sysfs_create_group(&sdp->sd_kobj, &tune_group); | |
436 | if (error) | |
437 | goto fail_args; | |
438 | ||
901195ed | 439 | kobject_uevent(&sdp->sd_kobj, KOBJ_ADD); |
b3b94faa DT |
440 | return 0; |
441 | ||
a91ea69f | 442 | fail_args: |
b3b94faa | 443 | sysfs_remove_group(&sdp->sd_kobj, &args_group); |
a91ea69f | 444 | fail_lockstruct: |
b3b94faa | 445 | sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group); |
a91ea69f | 446 | fail_reg: |
197b12d6 | 447 | kobject_put(&sdp->sd_kobj); |
a91ea69f | 448 | fail: |
65952fb4 | 449 | fs_err(sdp, "error %d adding sysfs files", error); |
b3b94faa DT |
450 | return error; |
451 | } | |
452 | ||
453 | void gfs2_sys_fs_del(struct gfs2_sbd *sdp) | |
454 | { | |
455 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); | |
456 | sysfs_remove_group(&sdp->sd_kobj, &args_group); | |
b3b94faa | 457 | sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group); |
197b12d6 | 458 | kobject_put(&sdp->sd_kobj); |
b3b94faa DT |
459 | } |
460 | ||
fdd1062e SW |
461 | static int gfs2_uevent(struct kset *kset, struct kobject *kobj, |
462 | struct kobj_uevent_env *env) | |
463 | { | |
464 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
465 | add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); | |
466 | add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); | |
467 | return 0; | |
468 | } | |
469 | ||
470 | static struct kset_uevent_ops gfs2_uevent_ops = { | |
471 | .uevent = gfs2_uevent, | |
472 | }; | |
473 | ||
474 | ||
b3b94faa DT |
475 | int gfs2_sys_init(void) |
476 | { | |
fdd1062e | 477 | gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); |
9bec101a GKH |
478 | if (!gfs2_kset) |
479 | return -ENOMEM; | |
480 | return 0; | |
b3b94faa DT |
481 | } |
482 | ||
483 | void gfs2_sys_uninit(void) | |
484 | { | |
9bec101a | 485 | kset_unregister(gfs2_kset); |
b3b94faa DT |
486 | } |
487 |