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 | ||
d77d1b58 JP |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
11 | ||
b3b94faa | 12 | #include <linux/sched.h> |
5b825c3a | 13 | #include <linux/cred.h> |
b3b94faa DT |
14 | #include <linux/spinlock.h> |
15 | #include <linux/completion.h> | |
16 | #include <linux/buffer_head.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/kobject.h> | |
7c0f6ba6 | 19 | #include <linux/uaccess.h> |
f057f6cd | 20 | #include <linux/gfs2_ondisk.h> |
31e54b01 | 21 | #include <linux/genhd.h> |
b3b94faa DT |
22 | |
23 | #include "gfs2.h" | |
5c676f6d | 24 | #include "incore.h" |
b3b94faa DT |
25 | #include "sys.h" |
26 | #include "super.h" | |
27 | #include "glock.h" | |
28 | #include "quota.h" | |
5c676f6d | 29 | #include "util.h" |
64d576ba | 30 | #include "glops.h" |
6ecd7c2d | 31 | #include "recovery.h" |
b3b94faa | 32 | |
48c2b613 SW |
33 | struct gfs2_attr { |
34 | struct attribute attr; | |
35 | ssize_t (*show)(struct gfs2_sbd *, char *); | |
36 | ssize_t (*store)(struct gfs2_sbd *, const char *, size_t); | |
37 | }; | |
38 | ||
39 | static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr, | |
40 | char *buf) | |
41 | { | |
42 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
43 | struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr); | |
44 | return a->show ? a->show(sdp, buf) : 0; | |
45 | } | |
46 | ||
47 | static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr, | |
48 | const char *buf, size_t len) | |
49 | { | |
50 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
51 | struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr); | |
52 | return a->store ? a->store(sdp, buf, len) : len; | |
53 | } | |
54 | ||
52cf25d0 | 55 | static const struct sysfs_ops gfs2_attr_ops = { |
48c2b613 SW |
56 | .show = gfs2_attr_show, |
57 | .store = gfs2_attr_store, | |
58 | }; | |
59 | ||
60 | ||
61 | static struct kset *gfs2_kset; | |
62 | ||
b3b94faa DT |
63 | static ssize_t id_show(struct gfs2_sbd *sdp, char *buf) |
64 | { | |
c7227e46 BP |
65 | return snprintf(buf, PAGE_SIZE, "%u:%u\n", |
66 | MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev)); | |
b3b94faa DT |
67 | } |
68 | ||
69 | static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf) | |
70 | { | |
3204a6c0 | 71 | return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname); |
b3b94faa DT |
72 | } |
73 | ||
02e3cc70 SW |
74 | static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf) |
75 | { | |
32e471ef | 76 | struct super_block *s = sdp->sd_vfs; |
85787090 | 77 | |
02e3cc70 | 78 | buf[0] = '\0'; |
85787090 | 79 | if (uuid_is_null(&s->s_uuid)) |
02e3cc70 | 80 | return 0; |
85787090 | 81 | return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid); |
02e3cc70 SW |
82 | } |
83 | ||
b3b94faa DT |
84 | static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf) |
85 | { | |
d564053f SW |
86 | struct super_block *sb = sdp->sd_vfs; |
87 | int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1; | |
b3b94faa | 88 | |
3566c964 | 89 | return snprintf(buf, PAGE_SIZE, "%d\n", frozen); |
b3b94faa DT |
90 | } |
91 | ||
92 | static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
93 | { | |
e50ead48 FF |
94 | int error, n; |
95 | ||
96 | error = kstrtoint(buf, 0, &n); | |
97 | if (error) | |
98 | return error; | |
b3b94faa DT |
99 | |
100 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 101 | return -EPERM; |
b3b94faa DT |
102 | |
103 | switch (n) { | |
104 | case 0: | |
d564053f | 105 | error = thaw_super(sdp->sd_vfs); |
b3b94faa DT |
106 | break; |
107 | case 1: | |
d564053f | 108 | error = freeze_super(sdp->sd_vfs); |
b3b94faa DT |
109 | break; |
110 | default: | |
d564053f | 111 | return -EINVAL; |
b3b94faa DT |
112 | } |
113 | ||
d564053f | 114 | if (error) { |
b3b94faa | 115 | fs_warn(sdp, "freeze %d error %d", n, error); |
d564053f SW |
116 | return error; |
117 | } | |
b3b94faa | 118 | |
d564053f | 119 | return len; |
b3b94faa DT |
120 | } |
121 | ||
122 | static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf) | |
123 | { | |
124 | unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags); | |
3204a6c0 | 125 | return snprintf(buf, PAGE_SIZE, "%u\n", b); |
b3b94faa DT |
126 | } |
127 | ||
128 | static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
129 | { | |
e50ead48 FF |
130 | int error, val; |
131 | ||
b3b94faa | 132 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 133 | return -EPERM; |
b3b94faa | 134 | |
e50ead48 FF |
135 | error = kstrtoint(buf, 0, &val); |
136 | if (error) | |
137 | return error; | |
138 | ||
139 | if (val != 1) | |
b3b94faa DT |
140 | return -EINVAL; |
141 | ||
cb94eb06 JP |
142 | gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n"); |
143 | ||
b3b94faa DT |
144 | return len; |
145 | } | |
146 | ||
147 | static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf, | |
148 | size_t len) | |
149 | { | |
e50ead48 FF |
150 | int error, val; |
151 | ||
b3b94faa | 152 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 153 | return -EPERM; |
b3b94faa | 154 | |
e50ead48 FF |
155 | error = kstrtoint(buf, 0, &val); |
156 | if (error) | |
157 | return error; | |
158 | ||
159 | if (val != 1) | |
b3b94faa DT |
160 | return -EINVAL; |
161 | ||
8c42d637 | 162 | gfs2_statfs_sync(sdp->sd_vfs, 0); |
b3b94faa DT |
163 | return len; |
164 | } | |
165 | ||
b3b94faa DT |
166 | static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf, |
167 | size_t len) | |
168 | { | |
e50ead48 FF |
169 | int error, val; |
170 | ||
b3b94faa | 171 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 172 | return -EPERM; |
b3b94faa | 173 | |
e50ead48 FF |
174 | error = kstrtoint(buf, 0, &val); |
175 | if (error) | |
176 | return error; | |
177 | ||
178 | if (val != 1) | |
b3b94faa DT |
179 | return -EINVAL; |
180 | ||
ceed1723 | 181 | gfs2_quota_sync(sdp->sd_vfs, 0); |
b3b94faa DT |
182 | return len; |
183 | } | |
184 | ||
185 | static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf, | |
186 | size_t len) | |
187 | { | |
ed87dabc | 188 | struct kqid qid; |
ea762338 | 189 | int error; |
cd915493 | 190 | u32 id; |
b3b94faa DT |
191 | |
192 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 193 | return -EPERM; |
b3b94faa | 194 | |
e50ead48 FF |
195 | error = kstrtou32(buf, 0, &id); |
196 | if (error) | |
197 | return error; | |
b3b94faa | 198 | |
ed87dabc EB |
199 | qid = make_kqid(current_user_ns(), USRQUOTA, id); |
200 | if (!qid_valid(qid)) | |
201 | return -EINVAL; | |
202 | ||
203 | error = gfs2_quota_refresh(sdp, qid); | |
ea762338 | 204 | return error ? error : len; |
b3b94faa DT |
205 | } |
206 | ||
207 | static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, | |
208 | size_t len) | |
209 | { | |
ed87dabc | 210 | struct kqid qid; |
ea762338 | 211 | int error; |
cd915493 | 212 | u32 id; |
b3b94faa DT |
213 | |
214 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 215 | return -EPERM; |
b3b94faa | 216 | |
e50ead48 FF |
217 | error = kstrtou32(buf, 0, &id); |
218 | if (error) | |
219 | return error; | |
b3b94faa | 220 | |
ed87dabc EB |
221 | qid = make_kqid(current_user_ns(), GRPQUOTA, id); |
222 | if (!qid_valid(qid)) | |
223 | return -EINVAL; | |
224 | ||
225 | error = gfs2_quota_refresh(sdp, qid); | |
ea762338 | 226 | return error ? error : len; |
b3b94faa DT |
227 | } |
228 | ||
64d576ba SW |
229 | static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
230 | { | |
231 | struct gfs2_glock *gl; | |
232 | const struct gfs2_glock_operations *glops; | |
233 | unsigned int glmode; | |
234 | unsigned int gltype; | |
235 | unsigned long long glnum; | |
236 | char mode[16]; | |
237 | int rv; | |
238 | ||
239 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 240 | return -EPERM; |
64d576ba SW |
241 | |
242 | rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum, | |
243 | mode); | |
244 | if (rv != 3) | |
245 | return -EINVAL; | |
246 | ||
247 | if (strcmp(mode, "EX") == 0) | |
248 | glmode = LM_ST_UNLOCKED; | |
249 | else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0)) | |
250 | glmode = LM_ST_DEFERRED; | |
251 | else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0)) | |
252 | glmode = LM_ST_SHARED; | |
253 | else | |
254 | return -EINVAL; | |
255 | ||
256 | if (gltype > LM_TYPE_JOURNAL) | |
257 | return -EINVAL; | |
24972557 BM |
258 | if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK) |
259 | glops = &gfs2_freeze_glops; | |
13466985 SW |
260 | else |
261 | glops = gfs2_glops_list[gltype]; | |
64d576ba SW |
262 | if (glops == NULL) |
263 | return -EINVAL; | |
6a99be5d | 264 | if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags)) |
913a71d2 | 265 | fs_info(sdp, "demote interface used\n"); |
64d576ba SW |
266 | rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl); |
267 | if (rv) | |
268 | return rv; | |
269 | gfs2_glock_cb(gl, glmode); | |
270 | gfs2_glock_put(gl); | |
271 | return len; | |
272 | } | |
273 | ||
b3b94faa DT |
274 | |
275 | #define GFS2_ATTR(name, mode, show, store) \ | |
276 | static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) | |
277 | ||
278 | GFS2_ATTR(id, 0444, id_show, NULL); | |
279 | GFS2_ATTR(fsname, 0444, fsname_show, NULL); | |
02e3cc70 | 280 | GFS2_ATTR(uuid, 0444, uuid_show, NULL); |
b3b94faa | 281 | GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); |
b3b94faa DT |
282 | GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store); |
283 | GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store); | |
284 | GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store); | |
285 | GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store); | |
286 | GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store); | |
64d576ba | 287 | GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store); |
b3b94faa DT |
288 | |
289 | static struct attribute *gfs2_attrs[] = { | |
290 | &gfs2_attr_id.attr, | |
291 | &gfs2_attr_fsname.attr, | |
02e3cc70 | 292 | &gfs2_attr_uuid.attr, |
b3b94faa | 293 | &gfs2_attr_freeze.attr, |
b3b94faa DT |
294 | &gfs2_attr_withdraw.attr, |
295 | &gfs2_attr_statfs_sync.attr, | |
296 | &gfs2_attr_quota_sync.attr, | |
297 | &gfs2_attr_quota_refresh_user.attr, | |
298 | &gfs2_attr_quota_refresh_group.attr, | |
64d576ba | 299 | &gfs2_attr_demote_rq.attr, |
b3b94faa DT |
300 | NULL, |
301 | }; | |
302 | ||
0d515210 BP |
303 | static void gfs2_sbd_release(struct kobject *kobj) |
304 | { | |
305 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
306 | ||
307 | kfree(sdp); | |
308 | } | |
309 | ||
b3b94faa | 310 | static struct kobj_type gfs2_ktype = { |
0d515210 | 311 | .release = gfs2_sbd_release, |
b3b94faa DT |
312 | .default_attrs = gfs2_attrs, |
313 | .sysfs_ops = &gfs2_attr_ops, | |
314 | }; | |
315 | ||
f057f6cd SW |
316 | |
317 | /* | |
318 | * lock_module. Originally from lock_dlm | |
319 | */ | |
320 | ||
321 | static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf) | |
322 | { | |
323 | const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops; | |
324 | return sprintf(buf, "%s\n", ops->lm_proto_name); | |
325 | } | |
326 | ||
327 | static ssize_t block_show(struct gfs2_sbd *sdp, char *buf) | |
328 | { | |
329 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
330 | ssize_t ret; | |
331 | int val = 0; | |
332 | ||
e0c2a9aa | 333 | if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags)) |
f057f6cd SW |
334 | val = 1; |
335 | ret = sprintf(buf, "%d\n", val); | |
336 | return ret; | |
337 | } | |
338 | ||
339 | static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
340 | { | |
341 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
e50ead48 | 342 | int ret, val; |
f057f6cd | 343 | |
e50ead48 FF |
344 | ret = kstrtoint(buf, 0, &val); |
345 | if (ret) | |
346 | return ret; | |
f057f6cd SW |
347 | |
348 | if (val == 1) | |
e0c2a9aa | 349 | set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
f057f6cd | 350 | else if (val == 0) { |
e0c2a9aa | 351 | clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
4e857c58 | 352 | smp_mb__after_atomic(); |
f057f6cd SW |
353 | gfs2_glock_thaw(sdp); |
354 | } else { | |
e50ead48 | 355 | return -EINVAL; |
f057f6cd | 356 | } |
e50ead48 | 357 | return len; |
f057f6cd SW |
358 | } |
359 | ||
fd95e81c SW |
360 | static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf) |
361 | { | |
362 | int val = completion_done(&sdp->sd_wdack) ? 1 : 0; | |
363 | ||
364 | return sprintf(buf, "%d\n", val); | |
365 | } | |
366 | ||
367 | static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
368 | { | |
e50ead48 | 369 | int ret, val; |
fd95e81c | 370 | |
e50ead48 FF |
371 | ret = kstrtoint(buf, 0, &val); |
372 | if (ret) | |
373 | return ret; | |
fd95e81c SW |
374 | |
375 | if ((val == 1) && | |
376 | !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm")) | |
377 | complete(&sdp->sd_wdack); | |
378 | else | |
e50ead48 FF |
379 | return -EINVAL; |
380 | return len; | |
fd95e81c SW |
381 | } |
382 | ||
f057f6cd SW |
383 | static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) |
384 | { | |
385 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
386 | return sprintf(buf, "%d\n", ls->ls_first); | |
387 | } | |
388 | ||
ba6e9364 SW |
389 | static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
390 | { | |
391 | unsigned first; | |
392 | int rv; | |
393 | ||
394 | rv = sscanf(buf, "%u", &first); | |
395 | if (rv != 1 || first > 1) | |
396 | return -EINVAL; | |
3942ae53 SW |
397 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
398 | if (rv) | |
399 | return rv; | |
ba6e9364 SW |
400 | spin_lock(&sdp->sd_jindex_spin); |
401 | rv = -EBUSY; | |
402 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) | |
403 | goto out; | |
404 | rv = -EINVAL; | |
405 | if (sdp->sd_args.ar_spectator) | |
406 | goto out; | |
407 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) | |
408 | goto out; | |
e0c2a9aa DT |
409 | sdp->sd_lockstruct.ls_first = first; |
410 | rv = 0; | |
ba6e9364 SW |
411 | out: |
412 | spin_unlock(&sdp->sd_jindex_spin); | |
413 | return rv ? rv : len; | |
414 | } | |
415 | ||
f057f6cd SW |
416 | static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) |
417 | { | |
418 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
e0c2a9aa | 419 | return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags)); |
f057f6cd SW |
420 | } |
421 | ||
e0c2a9aa | 422 | int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid) |
f057f6cd SW |
423 | { |
424 | struct gfs2_jdesc *jd; | |
fe64d517 SW |
425 | int rv; |
426 | ||
0e48e055 BP |
427 | /* Wait for our primary journal to be initialized */ |
428 | wait_for_completion(&sdp->sd_journal_ready); | |
429 | ||
f057f6cd | 430 | spin_lock(&sdp->sd_jindex_spin); |
fe64d517 SW |
431 | rv = -EBUSY; |
432 | if (sdp->sd_jdesc->jd_jid == jid) | |
433 | goto out; | |
434 | rv = -ENOENT; | |
f057f6cd SW |
435 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
436 | if (jd->jd_jid != jid) | |
437 | continue; | |
6ecd7c2d | 438 | rv = gfs2_recover_journal(jd, false); |
f057f6cd SW |
439 | break; |
440 | } | |
fe64d517 | 441 | out: |
f057f6cd | 442 | spin_unlock(&sdp->sd_jindex_spin); |
e0c2a9aa DT |
443 | return rv; |
444 | } | |
445 | ||
446 | static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
447 | { | |
448 | unsigned jid; | |
449 | int rv; | |
450 | ||
451 | rv = sscanf(buf, "%u", &jid); | |
452 | if (rv != 1) | |
453 | return -EINVAL; | |
454 | ||
1a058f52 DT |
455 | if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { |
456 | rv = -ESHUTDOWN; | |
457 | goto out; | |
458 | } | |
e0c2a9aa | 459 | |
1a058f52 DT |
460 | rv = gfs2_recover_set(sdp, jid); |
461 | out: | |
fe64d517 | 462 | return rv ? rv : len; |
f057f6cd SW |
463 | } |
464 | ||
465 | static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) | |
466 | { | |
467 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
468 | return sprintf(buf, "%d\n", ls->ls_recover_jid_done); | |
469 | } | |
470 | ||
471 | static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) | |
472 | { | |
473 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
474 | return sprintf(buf, "%d\n", ls->ls_recover_jid_status); | |
475 | } | |
476 | ||
e1b28aab SW |
477 | static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) |
478 | { | |
feb47ca9 | 479 | return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); |
e1b28aab SW |
480 | } |
481 | ||
ba6e9364 SW |
482 | static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
483 | { | |
feb47ca9 | 484 | int jid; |
ba6e9364 SW |
485 | int rv; |
486 | ||
feb47ca9 | 487 | rv = sscanf(buf, "%d", &jid); |
ba6e9364 SW |
488 | if (rv != 1) |
489 | return -EINVAL; | |
3942ae53 SW |
490 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
491 | if (rv) | |
492 | return rv; | |
ba6e9364 SW |
493 | spin_lock(&sdp->sd_jindex_spin); |
494 | rv = -EINVAL; | |
ba6e9364 SW |
495 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
496 | goto out; | |
497 | rv = -EBUSY; | |
feb47ca9 | 498 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) |
ba6e9364 | 499 | goto out; |
feb47ca9 SW |
500 | rv = 0; |
501 | if (sdp->sd_args.ar_spectator && jid > 0) | |
502 | rv = jid = -EINVAL; | |
ba6e9364 | 503 | sdp->sd_lockstruct.ls_jid = jid; |
feb47ca9 | 504 | clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
4e857c58 | 505 | smp_mb__after_atomic(); |
ba6e9364 | 506 | wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); |
ba6e9364 SW |
507 | out: |
508 | spin_unlock(&sdp->sd_jindex_spin); | |
509 | return rv ? rv : len; | |
510 | } | |
511 | ||
f057f6cd | 512 | #define GDLM_ATTR(_name,_mode,_show,_store) \ |
48c2b613 | 513 | static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) |
f057f6cd | 514 | |
d7e623da SW |
515 | GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); |
516 | GDLM_ATTR(block, 0644, block_show, block_store); | |
fd95e81c | 517 | GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store); |
ba6e9364 SW |
518 | GDLM_ATTR(jid, 0644, jid_show, jid_store); |
519 | GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); | |
d7e623da SW |
520 | GDLM_ATTR(first_done, 0444, first_done_show, NULL); |
521 | GDLM_ATTR(recover, 0600, NULL, recover_store); | |
522 | GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); | |
523 | GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); | |
f057f6cd SW |
524 | |
525 | static struct attribute *lock_module_attrs[] = { | |
526 | &gdlm_attr_proto_name.attr, | |
527 | &gdlm_attr_block.attr, | |
528 | &gdlm_attr_withdraw.attr, | |
e1b28aab | 529 | &gdlm_attr_jid.attr, |
f057f6cd SW |
530 | &gdlm_attr_first.attr, |
531 | &gdlm_attr_first_done.attr, | |
532 | &gdlm_attr_recover.attr, | |
533 | &gdlm_attr_recover_done.attr, | |
534 | &gdlm_attr_recover_status.attr, | |
ea67eedb | 535 | NULL, |
b3b94faa DT |
536 | }; |
537 | ||
b3b94faa DT |
538 | /* |
539 | * get and set struct gfs2_tune fields | |
540 | */ | |
541 | ||
542 | static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) | |
543 | { | |
3204a6c0 DT |
544 | return snprintf(buf, PAGE_SIZE, "%u %u\n", |
545 | sdp->sd_tune.gt_quota_scale_num, | |
546 | sdp->sd_tune.gt_quota_scale_den); | |
b3b94faa DT |
547 | } |
548 | ||
549 | static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, | |
550 | size_t len) | |
551 | { | |
552 | struct gfs2_tune *gt = &sdp->sd_tune; | |
553 | unsigned int x, y; | |
554 | ||
555 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 556 | return -EPERM; |
b3b94faa DT |
557 | |
558 | if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) | |
559 | return -EINVAL; | |
560 | ||
561 | spin_lock(>->gt_spin); | |
562 | gt->gt_quota_scale_num = x; | |
563 | gt->gt_quota_scale_den = y; | |
564 | spin_unlock(>->gt_spin); | |
565 | return len; | |
566 | } | |
567 | ||
568 | static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, | |
569 | int check_zero, const char *buf, size_t len) | |
570 | { | |
571 | struct gfs2_tune *gt = &sdp->sd_tune; | |
572 | unsigned int x; | |
e50ead48 | 573 | int error; |
b3b94faa DT |
574 | |
575 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 576 | return -EPERM; |
b3b94faa | 577 | |
e50ead48 FF |
578 | error = kstrtouint(buf, 0, &x); |
579 | if (error) | |
580 | return error; | |
b3b94faa DT |
581 | |
582 | if (check_zero && !x) | |
583 | return -EINVAL; | |
584 | ||
585 | spin_lock(>->gt_spin); | |
586 | *field = x; | |
587 | spin_unlock(>->gt_spin); | |
588 | return len; | |
589 | } | |
590 | ||
b3b94faa | 591 | #define TUNE_ATTR_3(name, show, store) \ |
48c2b613 | 592 | static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) |
b3b94faa DT |
593 | |
594 | #define TUNE_ATTR_2(name, store) \ | |
595 | static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ | |
596 | { \ | |
3204a6c0 | 597 | return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ |
b3b94faa DT |
598 | } \ |
599 | TUNE_ATTR_3(name, name##_show, store) | |
600 | ||
601 | #define TUNE_ATTR(name, check_zero) \ | |
602 | static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ | |
603 | { \ | |
604 | return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ | |
605 | } \ | |
606 | TUNE_ATTR_2(name, name##_store) | |
607 | ||
b3b94faa DT |
608 | TUNE_ATTR(quota_warn_period, 0); |
609 | TUNE_ATTR(quota_quantum, 0); | |
b3b94faa DT |
610 | TUNE_ATTR(max_readahead, 0); |
611 | TUNE_ATTR(complain_secs, 0); | |
b3b94faa DT |
612 | TUNE_ATTR(statfs_slow, 0); |
613 | TUNE_ATTR(new_files_jdata, 0); | |
b3b94faa | 614 | TUNE_ATTR(statfs_quantum, 1); |
b3b94faa DT |
615 | TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); |
616 | ||
617 | static struct attribute *tune_attrs[] = { | |
b3b94faa DT |
618 | &tune_attr_quota_warn_period.attr, |
619 | &tune_attr_quota_quantum.attr, | |
b3b94faa DT |
620 | &tune_attr_max_readahead.attr, |
621 | &tune_attr_complain_secs.attr, | |
b3b94faa | 622 | &tune_attr_statfs_slow.attr, |
b3b94faa | 623 | &tune_attr_statfs_quantum.attr, |
b3b94faa DT |
624 | &tune_attr_quota_scale.attr, |
625 | &tune_attr_new_files_jdata.attr, | |
ea67eedb | 626 | NULL, |
b3b94faa DT |
627 | }; |
628 | ||
29695254 | 629 | static const struct attribute_group tune_group = { |
b3b94faa | 630 | .name = "tune", |
ea67eedb | 631 | .attrs = tune_attrs, |
b3b94faa DT |
632 | }; |
633 | ||
29695254 | 634 | static const struct attribute_group lock_module_group = { |
f057f6cd SW |
635 | .name = "lock_module", |
636 | .attrs = lock_module_attrs, | |
637 | }; | |
638 | ||
b3b94faa DT |
639 | int gfs2_sys_fs_add(struct gfs2_sbd *sdp) |
640 | { | |
440d6da2 | 641 | struct super_block *sb = sdp->sd_vfs; |
b3b94faa | 642 | int error; |
440d6da2 SW |
643 | char ro[20]; |
644 | char spectator[20]; | |
645 | char *envp[] = { ro, spectator, NULL }; | |
0d515210 | 646 | int sysfs_frees_sdp = 0; |
440d6da2 SW |
647 | |
648 | sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0); | |
649 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); | |
b3b94faa | 650 | |
9bec101a | 651 | sdp->sd_kobj.kset = gfs2_kset; |
901195ed GKH |
652 | error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, |
653 | "%s", sdp->sd_table_name); | |
b3b94faa | 654 | if (error) |
0d515210 | 655 | goto fail_reg; |
b3b94faa | 656 | |
0d515210 BP |
657 | sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling |
658 | function gfs2_sbd_release. */ | |
b3b94faa DT |
659 | error = sysfs_create_group(&sdp->sd_kobj, &tune_group); |
660 | if (error) | |
f6eb5349 | 661 | goto fail_reg; |
b3b94faa | 662 | |
f057f6cd SW |
663 | error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); |
664 | if (error) | |
665 | goto fail_tune; | |
666 | ||
31e54b01 SW |
667 | error = sysfs_create_link(&sdp->sd_kobj, |
668 | &disk_to_dev(sb->s_bdev->bd_disk)->kobj, | |
669 | "device"); | |
670 | if (error) | |
671 | goto fail_lock_module; | |
672 | ||
440d6da2 | 673 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); |
b3b94faa DT |
674 | return 0; |
675 | ||
31e54b01 SW |
676 | fail_lock_module: |
677 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); | |
f057f6cd SW |
678 | fail_tune: |
679 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); | |
a91ea69f | 680 | fail_reg: |
0d515210 | 681 | free_percpu(sdp->sd_lkstats); |
65952fb4 | 682 | fs_err(sdp, "error %d adding sysfs files", error); |
0d515210 BP |
683 | if (sysfs_frees_sdp) |
684 | kobject_put(&sdp->sd_kobj); | |
685 | else | |
686 | kfree(sdp); | |
687 | sb->s_fs_info = NULL; | |
b3b94faa DT |
688 | return error; |
689 | } | |
690 | ||
691 | void gfs2_sys_fs_del(struct gfs2_sbd *sdp) | |
692 | { | |
31e54b01 | 693 | sysfs_remove_link(&sdp->sd_kobj, "device"); |
b3b94faa | 694 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); |
f057f6cd | 695 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); |
197b12d6 | 696 | kobject_put(&sdp->sd_kobj); |
b3b94faa DT |
697 | } |
698 | ||
fdd1062e SW |
699 | static int gfs2_uevent(struct kset *kset, struct kobject *kobj, |
700 | struct kobj_uevent_env *env) | |
701 | { | |
702 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
32e471ef | 703 | struct super_block *s = sdp->sd_vfs; |
02e3cc70 | 704 | |
fdd1062e SW |
705 | add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); |
706 | add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); | |
ba6e9364 | 707 | if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
feb47ca9 | 708 | add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); |
85787090 CH |
709 | if (!uuid_is_null(&s->s_uuid)) |
710 | add_uevent_var(env, "UUID=%pUB", &s->s_uuid); | |
fdd1062e SW |
711 | return 0; |
712 | } | |
713 | ||
9cd43611 | 714 | static const struct kset_uevent_ops gfs2_uevent_ops = { |
fdd1062e SW |
715 | .uevent = gfs2_uevent, |
716 | }; | |
717 | ||
b3b94faa DT |
718 | int gfs2_sys_init(void) |
719 | { | |
fdd1062e | 720 | gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); |
9bec101a GKH |
721 | if (!gfs2_kset) |
722 | return -ENOMEM; | |
723 | return 0; | |
b3b94faa DT |
724 | } |
725 | ||
726 | void gfs2_sys_uninit(void) | |
727 | { | |
9bec101a | 728 | kset_unregister(gfs2_kset); |
b3b94faa DT |
729 | } |
730 |