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> | |
b3b94faa DT |
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> | |
b3b94faa | 16 | #include <asm/uaccess.h> |
f057f6cd | 17 | #include <linux/gfs2_ondisk.h> |
31e54b01 | 18 | #include <linux/genhd.h> |
b3b94faa DT |
19 | |
20 | #include "gfs2.h" | |
5c676f6d | 21 | #include "incore.h" |
b3b94faa DT |
22 | #include "sys.h" |
23 | #include "super.h" | |
24 | #include "glock.h" | |
25 | #include "quota.h" | |
5c676f6d | 26 | #include "util.h" |
64d576ba | 27 | #include "glops.h" |
6ecd7c2d | 28 | #include "recovery.h" |
b3b94faa | 29 | |
48c2b613 SW |
30 | struct gfs2_attr { |
31 | struct attribute attr; | |
32 | ssize_t (*show)(struct gfs2_sbd *, char *); | |
33 | ssize_t (*store)(struct gfs2_sbd *, const char *, size_t); | |
34 | }; | |
35 | ||
36 | static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr, | |
37 | char *buf) | |
38 | { | |
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; | |
42 | } | |
43 | ||
44 | static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr, | |
45 | const char *buf, size_t len) | |
46 | { | |
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; | |
50 | } | |
51 | ||
52cf25d0 | 52 | static const struct sysfs_ops gfs2_attr_ops = { |
48c2b613 SW |
53 | .show = gfs2_attr_show, |
54 | .store = gfs2_attr_store, | |
55 | }; | |
56 | ||
57 | ||
58 | static struct kset *gfs2_kset; | |
59 | ||
b3b94faa DT |
60 | static ssize_t id_show(struct gfs2_sbd *sdp, char *buf) |
61 | { | |
c7227e46 BP |
62 | return snprintf(buf, PAGE_SIZE, "%u:%u\n", |
63 | MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev)); | |
b3b94faa DT |
64 | } |
65 | ||
66 | static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf) | |
67 | { | |
3204a6c0 | 68 | return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname); |
b3b94faa DT |
69 | } |
70 | ||
02e3cc70 SW |
71 | static int gfs2_uuid_valid(const u8 *uuid) |
72 | { | |
73 | int i; | |
74 | ||
75 | for (i = 0; i < 16; i++) { | |
76 | if (uuid[i]) | |
77 | return 1; | |
78 | } | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf) | |
83 | { | |
32e471ef SW |
84 | struct super_block *s = sdp->sd_vfs; |
85 | const u8 *uuid = s->s_uuid; | |
02e3cc70 SW |
86 | buf[0] = '\0'; |
87 | if (!gfs2_uuid_valid(uuid)) | |
88 | return 0; | |
f0b34ae6 | 89 | return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid); |
02e3cc70 SW |
90 | } |
91 | ||
b3b94faa DT |
92 | static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf) |
93 | { | |
94 | unsigned int count; | |
95 | ||
f55ab26a | 96 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa | 97 | count = sdp->sd_freeze_count; |
f55ab26a | 98 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa | 99 | |
3204a6c0 | 100 | return snprintf(buf, PAGE_SIZE, "%u\n", count); |
b3b94faa DT |
101 | } |
102 | ||
103 | static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
104 | { | |
105 | ssize_t ret = len; | |
106 | int error = 0; | |
107 | int n = simple_strtol(buf, NULL, 0); | |
108 | ||
109 | if (!capable(CAP_SYS_ADMIN)) | |
110 | return -EACCES; | |
111 | ||
112 | switch (n) { | |
113 | case 0: | |
114 | gfs2_unfreeze_fs(sdp); | |
115 | break; | |
116 | case 1: | |
117 | error = gfs2_freeze_fs(sdp); | |
118 | break; | |
119 | default: | |
120 | ret = -EINVAL; | |
121 | } | |
122 | ||
123 | if (error) | |
124 | fs_warn(sdp, "freeze %d error %d", n, error); | |
125 | ||
126 | return ret; | |
127 | } | |
128 | ||
129 | static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf) | |
130 | { | |
131 | unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags); | |
3204a6c0 | 132 | return snprintf(buf, PAGE_SIZE, "%u\n", b); |
b3b94faa DT |
133 | } |
134 | ||
135 | static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
136 | { | |
137 | if (!capable(CAP_SYS_ADMIN)) | |
138 | return -EACCES; | |
139 | ||
140 | if (simple_strtol(buf, NULL, 0) != 1) | |
141 | return -EINVAL; | |
142 | ||
143 | gfs2_lm_withdraw(sdp, | |
144 | "GFS2: fsid=%s: withdrawing from cluster at user's request\n", | |
145 | sdp->sd_fsname); | |
146 | return len; | |
147 | } | |
148 | ||
149 | static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf, | |
150 | size_t len) | |
151 | { | |
152 | if (!capable(CAP_SYS_ADMIN)) | |
153 | return -EACCES; | |
154 | ||
155 | if (simple_strtol(buf, NULL, 0) != 1) | |
156 | return -EINVAL; | |
157 | ||
8c42d637 | 158 | gfs2_statfs_sync(sdp->sd_vfs, 0); |
b3b94faa DT |
159 | return len; |
160 | } | |
161 | ||
b3b94faa DT |
162 | static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf, |
163 | size_t len) | |
164 | { | |
165 | if (!capable(CAP_SYS_ADMIN)) | |
166 | return -EACCES; | |
167 | ||
168 | if (simple_strtol(buf, NULL, 0) != 1) | |
169 | return -EINVAL; | |
170 | ||
5fb324ad | 171 | gfs2_quota_sync(sdp->sd_vfs, 0, 1); |
b3b94faa DT |
172 | return len; |
173 | } | |
174 | ||
175 | static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf, | |
176 | size_t len) | |
177 | { | |
ea762338 | 178 | int error; |
cd915493 | 179 | u32 id; |
b3b94faa DT |
180 | |
181 | if (!capable(CAP_SYS_ADMIN)) | |
182 | return -EACCES; | |
183 | ||
184 | id = simple_strtoul(buf, NULL, 0); | |
185 | ||
ea762338 SW |
186 | error = gfs2_quota_refresh(sdp, 1, id); |
187 | return error ? error : len; | |
b3b94faa DT |
188 | } |
189 | ||
190 | static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, | |
191 | size_t len) | |
192 | { | |
ea762338 | 193 | int error; |
cd915493 | 194 | u32 id; |
b3b94faa DT |
195 | |
196 | if (!capable(CAP_SYS_ADMIN)) | |
197 | return -EACCES; | |
198 | ||
199 | id = simple_strtoul(buf, NULL, 0); | |
200 | ||
ea762338 SW |
201 | error = gfs2_quota_refresh(sdp, 0, id); |
202 | return error ? error : len; | |
b3b94faa DT |
203 | } |
204 | ||
64d576ba SW |
205 | static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
206 | { | |
207 | struct gfs2_glock *gl; | |
208 | const struct gfs2_glock_operations *glops; | |
209 | unsigned int glmode; | |
210 | unsigned int gltype; | |
211 | unsigned long long glnum; | |
212 | char mode[16]; | |
213 | int rv; | |
214 | ||
215 | if (!capable(CAP_SYS_ADMIN)) | |
216 | return -EACCES; | |
217 | ||
218 | rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum, | |
219 | mode); | |
220 | if (rv != 3) | |
221 | return -EINVAL; | |
222 | ||
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; | |
229 | else | |
230 | return -EINVAL; | |
231 | ||
232 | if (gltype > LM_TYPE_JOURNAL) | |
233 | return -EINVAL; | |
13466985 SW |
234 | if (gltype == LM_TYPE_NONDISK && glnum == GFS2_TRANS_LOCK) |
235 | glops = &gfs2_trans_glops; | |
236 | else | |
237 | glops = gfs2_glops_list[gltype]; | |
64d576ba SW |
238 | if (glops == NULL) |
239 | return -EINVAL; | |
6a99be5d | 240 | if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags)) |
913a71d2 | 241 | fs_info(sdp, "demote interface used\n"); |
64d576ba SW |
242 | rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl); |
243 | if (rv) | |
244 | return rv; | |
245 | gfs2_glock_cb(gl, glmode); | |
246 | gfs2_glock_put(gl); | |
247 | return len; | |
248 | } | |
249 | ||
b3b94faa DT |
250 | |
251 | #define GFS2_ATTR(name, mode, show, store) \ | |
252 | static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) | |
253 | ||
254 | GFS2_ATTR(id, 0444, id_show, NULL); | |
255 | GFS2_ATTR(fsname, 0444, fsname_show, NULL); | |
02e3cc70 | 256 | GFS2_ATTR(uuid, 0444, uuid_show, NULL); |
b3b94faa | 257 | GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); |
b3b94faa DT |
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); | |
64d576ba | 263 | GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store); |
b3b94faa DT |
264 | |
265 | static struct attribute *gfs2_attrs[] = { | |
266 | &gfs2_attr_id.attr, | |
267 | &gfs2_attr_fsname.attr, | |
02e3cc70 | 268 | &gfs2_attr_uuid.attr, |
b3b94faa | 269 | &gfs2_attr_freeze.attr, |
b3b94faa DT |
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, | |
64d576ba | 275 | &gfs2_attr_demote_rq.attr, |
b3b94faa DT |
276 | NULL, |
277 | }; | |
278 | ||
b3b94faa DT |
279 | static struct kobj_type gfs2_ktype = { |
280 | .default_attrs = gfs2_attrs, | |
281 | .sysfs_ops = &gfs2_attr_ops, | |
282 | }; | |
283 | ||
f057f6cd SW |
284 | |
285 | /* | |
286 | * lock_module. Originally from lock_dlm | |
287 | */ | |
288 | ||
289 | static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf) | |
290 | { | |
291 | const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops; | |
292 | return sprintf(buf, "%s\n", ops->lm_proto_name); | |
293 | } | |
294 | ||
295 | static ssize_t block_show(struct gfs2_sbd *sdp, char *buf) | |
296 | { | |
297 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
298 | ssize_t ret; | |
299 | int val = 0; | |
300 | ||
301 | if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags)) | |
302 | val = 1; | |
303 | ret = sprintf(buf, "%d\n", val); | |
304 | return ret; | |
305 | } | |
306 | ||
307 | static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
308 | { | |
309 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
310 | ssize_t ret = len; | |
311 | int val; | |
312 | ||
313 | val = simple_strtol(buf, NULL, 0); | |
314 | ||
315 | if (val == 1) | |
316 | set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags); | |
317 | else if (val == 0) { | |
318 | clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags); | |
319 | smp_mb__after_clear_bit(); | |
320 | gfs2_glock_thaw(sdp); | |
321 | } else { | |
322 | ret = -EINVAL; | |
323 | } | |
324 | return ret; | |
325 | } | |
326 | ||
f057f6cd SW |
327 | static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) |
328 | { | |
329 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
330 | return sprintf(buf, "%d\n", ls->ls_first); | |
331 | } | |
332 | ||
ba6e9364 SW |
333 | static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
334 | { | |
335 | unsigned first; | |
336 | int rv; | |
337 | ||
338 | rv = sscanf(buf, "%u", &first); | |
339 | if (rv != 1 || first > 1) | |
340 | return -EINVAL; | |
341 | spin_lock(&sdp->sd_jindex_spin); | |
342 | rv = -EBUSY; | |
343 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) | |
344 | goto out; | |
345 | rv = -EINVAL; | |
346 | if (sdp->sd_args.ar_spectator) | |
347 | goto out; | |
348 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) | |
349 | goto out; | |
350 | sdp->sd_lockstruct.ls_first = first; | |
351 | rv = 0; | |
352 | out: | |
353 | spin_unlock(&sdp->sd_jindex_spin); | |
354 | return rv ? rv : len; | |
355 | } | |
356 | ||
f057f6cd SW |
357 | static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) |
358 | { | |
359 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
360 | return sprintf(buf, "%d\n", ls->ls_first_done); | |
361 | } | |
362 | ||
fe64d517 | 363 | static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
f057f6cd | 364 | { |
fe64d517 | 365 | unsigned jid; |
f057f6cd | 366 | struct gfs2_jdesc *jd; |
fe64d517 SW |
367 | int rv; |
368 | ||
369 | rv = sscanf(buf, "%u", &jid); | |
370 | if (rv != 1) | |
371 | return -EINVAL; | |
f057f6cd | 372 | |
fe64d517 | 373 | rv = -ESHUTDOWN; |
f057f6cd | 374 | spin_lock(&sdp->sd_jindex_spin); |
fe64d517 SW |
375 | if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) |
376 | goto out; | |
377 | rv = -EBUSY; | |
378 | if (sdp->sd_jdesc->jd_jid == jid) | |
379 | goto out; | |
380 | rv = -ENOENT; | |
f057f6cd SW |
381 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
382 | if (jd->jd_jid != jid) | |
383 | continue; | |
6ecd7c2d | 384 | rv = gfs2_recover_journal(jd, false); |
f057f6cd SW |
385 | break; |
386 | } | |
fe64d517 | 387 | out: |
f057f6cd | 388 | spin_unlock(&sdp->sd_jindex_spin); |
fe64d517 | 389 | return rv ? rv : len; |
f057f6cd SW |
390 | } |
391 | ||
392 | static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) | |
393 | { | |
394 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
395 | return sprintf(buf, "%d\n", ls->ls_recover_jid_done); | |
396 | } | |
397 | ||
398 | static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) | |
399 | { | |
400 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
401 | return sprintf(buf, "%d\n", ls->ls_recover_jid_status); | |
402 | } | |
403 | ||
e1b28aab SW |
404 | static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) |
405 | { | |
feb47ca9 | 406 | return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); |
e1b28aab SW |
407 | } |
408 | ||
ba6e9364 SW |
409 | static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
410 | { | |
feb47ca9 | 411 | int jid; |
ba6e9364 SW |
412 | int rv; |
413 | ||
feb47ca9 | 414 | rv = sscanf(buf, "%d", &jid); |
ba6e9364 SW |
415 | if (rv != 1) |
416 | return -EINVAL; | |
417 | ||
418 | spin_lock(&sdp->sd_jindex_spin); | |
419 | rv = -EINVAL; | |
ba6e9364 SW |
420 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
421 | goto out; | |
422 | rv = -EBUSY; | |
feb47ca9 | 423 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) |
ba6e9364 | 424 | goto out; |
feb47ca9 SW |
425 | rv = 0; |
426 | if (sdp->sd_args.ar_spectator && jid > 0) | |
427 | rv = jid = -EINVAL; | |
ba6e9364 | 428 | sdp->sd_lockstruct.ls_jid = jid; |
feb47ca9 | 429 | clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
ba6e9364 SW |
430 | smp_mb__after_clear_bit(); |
431 | wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); | |
ba6e9364 SW |
432 | out: |
433 | spin_unlock(&sdp->sd_jindex_spin); | |
434 | return rv ? rv : len; | |
435 | } | |
436 | ||
f057f6cd | 437 | #define GDLM_ATTR(_name,_mode,_show,_store) \ |
48c2b613 | 438 | static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) |
f057f6cd | 439 | |
d7e623da SW |
440 | GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); |
441 | GDLM_ATTR(block, 0644, block_show, block_store); | |
442 | GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store); | |
ba6e9364 SW |
443 | GDLM_ATTR(jid, 0644, jid_show, jid_store); |
444 | GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); | |
d7e623da SW |
445 | GDLM_ATTR(first_done, 0444, first_done_show, NULL); |
446 | GDLM_ATTR(recover, 0600, NULL, recover_store); | |
447 | GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); | |
448 | GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); | |
f057f6cd SW |
449 | |
450 | static struct attribute *lock_module_attrs[] = { | |
451 | &gdlm_attr_proto_name.attr, | |
452 | &gdlm_attr_block.attr, | |
453 | &gdlm_attr_withdraw.attr, | |
e1b28aab | 454 | &gdlm_attr_jid.attr, |
f057f6cd SW |
455 | &gdlm_attr_first.attr, |
456 | &gdlm_attr_first_done.attr, | |
457 | &gdlm_attr_recover.attr, | |
458 | &gdlm_attr_recover_done.attr, | |
459 | &gdlm_attr_recover_status.attr, | |
ea67eedb | 460 | NULL, |
b3b94faa DT |
461 | }; |
462 | ||
b3b94faa DT |
463 | /* |
464 | * get and set struct gfs2_tune fields | |
465 | */ | |
466 | ||
467 | static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) | |
468 | { | |
3204a6c0 DT |
469 | return snprintf(buf, PAGE_SIZE, "%u %u\n", |
470 | sdp->sd_tune.gt_quota_scale_num, | |
471 | sdp->sd_tune.gt_quota_scale_den); | |
b3b94faa DT |
472 | } |
473 | ||
474 | static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, | |
475 | size_t len) | |
476 | { | |
477 | struct gfs2_tune *gt = &sdp->sd_tune; | |
478 | unsigned int x, y; | |
479 | ||
480 | if (!capable(CAP_SYS_ADMIN)) | |
481 | return -EACCES; | |
482 | ||
483 | if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) | |
484 | return -EINVAL; | |
485 | ||
486 | spin_lock(>->gt_spin); | |
487 | gt->gt_quota_scale_num = x; | |
488 | gt->gt_quota_scale_den = y; | |
489 | spin_unlock(>->gt_spin); | |
490 | return len; | |
491 | } | |
492 | ||
493 | static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, | |
494 | int check_zero, const char *buf, size_t len) | |
495 | { | |
496 | struct gfs2_tune *gt = &sdp->sd_tune; | |
497 | unsigned int x; | |
498 | ||
499 | if (!capable(CAP_SYS_ADMIN)) | |
500 | return -EACCES; | |
501 | ||
502 | x = simple_strtoul(buf, NULL, 0); | |
503 | ||
504 | if (check_zero && !x) | |
505 | return -EINVAL; | |
506 | ||
507 | spin_lock(>->gt_spin); | |
508 | *field = x; | |
509 | spin_unlock(>->gt_spin); | |
510 | return len; | |
511 | } | |
512 | ||
b3b94faa | 513 | #define TUNE_ATTR_3(name, show, store) \ |
48c2b613 | 514 | static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) |
b3b94faa DT |
515 | |
516 | #define TUNE_ATTR_2(name, store) \ | |
517 | static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ | |
518 | { \ | |
3204a6c0 | 519 | return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ |
b3b94faa DT |
520 | } \ |
521 | TUNE_ATTR_3(name, name##_show, store) | |
522 | ||
523 | #define TUNE_ATTR(name, check_zero) \ | |
524 | static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ | |
525 | { \ | |
526 | return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ | |
527 | } \ | |
528 | TUNE_ATTR_2(name, name##_store) | |
529 | ||
b3b94faa DT |
530 | TUNE_ATTR(quota_warn_period, 0); |
531 | TUNE_ATTR(quota_quantum, 0); | |
b3b94faa DT |
532 | TUNE_ATTR(max_readahead, 0); |
533 | TUNE_ATTR(complain_secs, 0); | |
b3b94faa DT |
534 | TUNE_ATTR(statfs_slow, 0); |
535 | TUNE_ATTR(new_files_jdata, 0); | |
b3b94faa | 536 | TUNE_ATTR(quota_simul_sync, 1); |
b3b94faa | 537 | TUNE_ATTR(statfs_quantum, 1); |
b3b94faa DT |
538 | TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); |
539 | ||
540 | static struct attribute *tune_attrs[] = { | |
b3b94faa DT |
541 | &tune_attr_quota_warn_period.attr, |
542 | &tune_attr_quota_quantum.attr, | |
b3b94faa DT |
543 | &tune_attr_max_readahead.attr, |
544 | &tune_attr_complain_secs.attr, | |
b3b94faa DT |
545 | &tune_attr_statfs_slow.attr, |
546 | &tune_attr_quota_simul_sync.attr, | |
b3b94faa | 547 | &tune_attr_statfs_quantum.attr, |
b3b94faa DT |
548 | &tune_attr_quota_scale.attr, |
549 | &tune_attr_new_files_jdata.attr, | |
ea67eedb | 550 | NULL, |
b3b94faa DT |
551 | }; |
552 | ||
b3b94faa DT |
553 | static struct attribute_group tune_group = { |
554 | .name = "tune", | |
ea67eedb | 555 | .attrs = tune_attrs, |
b3b94faa DT |
556 | }; |
557 | ||
f057f6cd SW |
558 | static struct attribute_group lock_module_group = { |
559 | .name = "lock_module", | |
560 | .attrs = lock_module_attrs, | |
561 | }; | |
562 | ||
b3b94faa DT |
563 | int gfs2_sys_fs_add(struct gfs2_sbd *sdp) |
564 | { | |
440d6da2 | 565 | struct super_block *sb = sdp->sd_vfs; |
b3b94faa | 566 | int error; |
440d6da2 SW |
567 | char ro[20]; |
568 | char spectator[20]; | |
569 | char *envp[] = { ro, spectator, NULL }; | |
570 | ||
571 | sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0); | |
572 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); | |
b3b94faa | 573 | |
9bec101a | 574 | sdp->sd_kobj.kset = gfs2_kset; |
901195ed GKH |
575 | error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, |
576 | "%s", sdp->sd_table_name); | |
b3b94faa DT |
577 | if (error) |
578 | goto fail; | |
579 | ||
b3b94faa DT |
580 | error = sysfs_create_group(&sdp->sd_kobj, &tune_group); |
581 | if (error) | |
f6eb5349 | 582 | goto fail_reg; |
b3b94faa | 583 | |
f057f6cd SW |
584 | error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); |
585 | if (error) | |
586 | goto fail_tune; | |
587 | ||
31e54b01 SW |
588 | error = sysfs_create_link(&sdp->sd_kobj, |
589 | &disk_to_dev(sb->s_bdev->bd_disk)->kobj, | |
590 | "device"); | |
591 | if (error) | |
592 | goto fail_lock_module; | |
593 | ||
440d6da2 | 594 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); |
b3b94faa DT |
595 | return 0; |
596 | ||
31e54b01 SW |
597 | fail_lock_module: |
598 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); | |
f057f6cd SW |
599 | fail_tune: |
600 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); | |
a91ea69f | 601 | fail_reg: |
197b12d6 | 602 | kobject_put(&sdp->sd_kobj); |
a91ea69f | 603 | fail: |
65952fb4 | 604 | fs_err(sdp, "error %d adding sysfs files", error); |
b3b94faa DT |
605 | return error; |
606 | } | |
607 | ||
608 | void gfs2_sys_fs_del(struct gfs2_sbd *sdp) | |
609 | { | |
31e54b01 | 610 | sysfs_remove_link(&sdp->sd_kobj, "device"); |
b3b94faa | 611 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); |
f057f6cd | 612 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); |
197b12d6 | 613 | kobject_put(&sdp->sd_kobj); |
b3b94faa DT |
614 | } |
615 | ||
fdd1062e SW |
616 | static int gfs2_uevent(struct kset *kset, struct kobject *kobj, |
617 | struct kobj_uevent_env *env) | |
618 | { | |
619 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
32e471ef SW |
620 | struct super_block *s = sdp->sd_vfs; |
621 | const u8 *uuid = s->s_uuid; | |
02e3cc70 | 622 | |
fdd1062e SW |
623 | add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); |
624 | add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); | |
ba6e9364 | 625 | if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
feb47ca9 | 626 | add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); |
f0b34ae6 JP |
627 | if (gfs2_uuid_valid(uuid)) |
628 | add_uevent_var(env, "UUID=%pUB", uuid); | |
fdd1062e SW |
629 | return 0; |
630 | } | |
631 | ||
9cd43611 | 632 | static const struct kset_uevent_ops gfs2_uevent_ops = { |
fdd1062e SW |
633 | .uevent = gfs2_uevent, |
634 | }; | |
635 | ||
b3b94faa DT |
636 | int gfs2_sys_init(void) |
637 | { | |
fdd1062e | 638 | gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); |
9bec101a GKH |
639 | if (!gfs2_kset) |
640 | return -ENOMEM; | |
641 | return 0; | |
b3b94faa DT |
642 | } |
643 | ||
644 | void gfs2_sys_uninit(void) | |
645 | { | |
9bec101a | 646 | kset_unregister(gfs2_kset); |
b3b94faa DT |
647 | } |
648 |