]>
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 int gfs2_uuid_valid(const u8 *uuid) |
75 | { | |
76 | int i; | |
77 | ||
78 | for (i = 0; i < 16; i++) { | |
79 | if (uuid[i]) | |
80 | return 1; | |
81 | } | |
82 | return 0; | |
83 | } | |
84 | ||
85 | static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf) | |
86 | { | |
32e471ef SW |
87 | struct super_block *s = sdp->sd_vfs; |
88 | const u8 *uuid = s->s_uuid; | |
02e3cc70 SW |
89 | buf[0] = '\0'; |
90 | if (!gfs2_uuid_valid(uuid)) | |
91 | return 0; | |
f0b34ae6 | 92 | return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid); |
02e3cc70 SW |
93 | } |
94 | ||
b3b94faa DT |
95 | static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf) |
96 | { | |
d564053f SW |
97 | struct super_block *sb = sdp->sd_vfs; |
98 | int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1; | |
b3b94faa | 99 | |
3566c964 | 100 | return snprintf(buf, PAGE_SIZE, "%d\n", frozen); |
b3b94faa DT |
101 | } |
102 | ||
103 | static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
104 | { | |
e50ead48 FF |
105 | int error, n; |
106 | ||
107 | error = kstrtoint(buf, 0, &n); | |
108 | if (error) | |
109 | return error; | |
b3b94faa DT |
110 | |
111 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 112 | return -EPERM; |
b3b94faa DT |
113 | |
114 | switch (n) { | |
115 | case 0: | |
d564053f | 116 | error = thaw_super(sdp->sd_vfs); |
b3b94faa DT |
117 | break; |
118 | case 1: | |
d564053f | 119 | error = freeze_super(sdp->sd_vfs); |
b3b94faa DT |
120 | break; |
121 | default: | |
d564053f | 122 | return -EINVAL; |
b3b94faa DT |
123 | } |
124 | ||
d564053f | 125 | if (error) { |
b3b94faa | 126 | fs_warn(sdp, "freeze %d error %d", n, error); |
d564053f SW |
127 | return error; |
128 | } | |
b3b94faa | 129 | |
d564053f | 130 | return len; |
b3b94faa DT |
131 | } |
132 | ||
133 | static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf) | |
134 | { | |
135 | unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags); | |
3204a6c0 | 136 | return snprintf(buf, PAGE_SIZE, "%u\n", b); |
b3b94faa DT |
137 | } |
138 | ||
139 | static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
140 | { | |
e50ead48 FF |
141 | int error, val; |
142 | ||
b3b94faa | 143 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 144 | return -EPERM; |
b3b94faa | 145 | |
e50ead48 FF |
146 | error = kstrtoint(buf, 0, &val); |
147 | if (error) | |
148 | return error; | |
149 | ||
150 | if (val != 1) | |
b3b94faa DT |
151 | return -EINVAL; |
152 | ||
cb94eb06 JP |
153 | gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n"); |
154 | ||
b3b94faa DT |
155 | return len; |
156 | } | |
157 | ||
158 | static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf, | |
159 | size_t len) | |
160 | { | |
e50ead48 FF |
161 | int error, val; |
162 | ||
b3b94faa | 163 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 164 | return -EPERM; |
b3b94faa | 165 | |
e50ead48 FF |
166 | error = kstrtoint(buf, 0, &val); |
167 | if (error) | |
168 | return error; | |
169 | ||
170 | if (val != 1) | |
b3b94faa DT |
171 | return -EINVAL; |
172 | ||
8c42d637 | 173 | gfs2_statfs_sync(sdp->sd_vfs, 0); |
b3b94faa DT |
174 | return len; |
175 | } | |
176 | ||
b3b94faa DT |
177 | static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf, |
178 | size_t len) | |
179 | { | |
e50ead48 FF |
180 | int error, val; |
181 | ||
b3b94faa | 182 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 183 | return -EPERM; |
b3b94faa | 184 | |
e50ead48 FF |
185 | error = kstrtoint(buf, 0, &val); |
186 | if (error) | |
187 | return error; | |
188 | ||
189 | if (val != 1) | |
b3b94faa DT |
190 | return -EINVAL; |
191 | ||
ceed1723 | 192 | gfs2_quota_sync(sdp->sd_vfs, 0); |
b3b94faa DT |
193 | return len; |
194 | } | |
195 | ||
196 | static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf, | |
197 | size_t len) | |
198 | { | |
ed87dabc | 199 | struct kqid qid; |
ea762338 | 200 | int error; |
cd915493 | 201 | u32 id; |
b3b94faa DT |
202 | |
203 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 204 | return -EPERM; |
b3b94faa | 205 | |
e50ead48 FF |
206 | error = kstrtou32(buf, 0, &id); |
207 | if (error) | |
208 | return error; | |
b3b94faa | 209 | |
ed87dabc EB |
210 | qid = make_kqid(current_user_ns(), USRQUOTA, id); |
211 | if (!qid_valid(qid)) | |
212 | return -EINVAL; | |
213 | ||
214 | error = gfs2_quota_refresh(sdp, qid); | |
ea762338 | 215 | return error ? error : len; |
b3b94faa DT |
216 | } |
217 | ||
218 | static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, | |
219 | size_t len) | |
220 | { | |
ed87dabc | 221 | struct kqid qid; |
ea762338 | 222 | int error; |
cd915493 | 223 | u32 id; |
b3b94faa DT |
224 | |
225 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 226 | return -EPERM; |
b3b94faa | 227 | |
e50ead48 FF |
228 | error = kstrtou32(buf, 0, &id); |
229 | if (error) | |
230 | return error; | |
b3b94faa | 231 | |
ed87dabc EB |
232 | qid = make_kqid(current_user_ns(), GRPQUOTA, id); |
233 | if (!qid_valid(qid)) | |
234 | return -EINVAL; | |
235 | ||
236 | error = gfs2_quota_refresh(sdp, qid); | |
ea762338 | 237 | return error ? error : len; |
b3b94faa DT |
238 | } |
239 | ||
64d576ba SW |
240 | static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
241 | { | |
242 | struct gfs2_glock *gl; | |
243 | const struct gfs2_glock_operations *glops; | |
244 | unsigned int glmode; | |
245 | unsigned int gltype; | |
246 | unsigned long long glnum; | |
247 | char mode[16]; | |
248 | int rv; | |
249 | ||
250 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 251 | return -EPERM; |
64d576ba SW |
252 | |
253 | rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum, | |
254 | mode); | |
255 | if (rv != 3) | |
256 | return -EINVAL; | |
257 | ||
258 | if (strcmp(mode, "EX") == 0) | |
259 | glmode = LM_ST_UNLOCKED; | |
260 | else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0)) | |
261 | glmode = LM_ST_DEFERRED; | |
262 | else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0)) | |
263 | glmode = LM_ST_SHARED; | |
264 | else | |
265 | return -EINVAL; | |
266 | ||
267 | if (gltype > LM_TYPE_JOURNAL) | |
268 | return -EINVAL; | |
24972557 BM |
269 | if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK) |
270 | glops = &gfs2_freeze_glops; | |
13466985 SW |
271 | else |
272 | glops = gfs2_glops_list[gltype]; | |
64d576ba SW |
273 | if (glops == NULL) |
274 | return -EINVAL; | |
6a99be5d | 275 | if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags)) |
913a71d2 | 276 | fs_info(sdp, "demote interface used\n"); |
64d576ba SW |
277 | rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl); |
278 | if (rv) | |
279 | return rv; | |
280 | gfs2_glock_cb(gl, glmode); | |
281 | gfs2_glock_put(gl); | |
282 | return len; | |
283 | } | |
284 | ||
b3b94faa DT |
285 | |
286 | #define GFS2_ATTR(name, mode, show, store) \ | |
287 | static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) | |
288 | ||
289 | GFS2_ATTR(id, 0444, id_show, NULL); | |
290 | GFS2_ATTR(fsname, 0444, fsname_show, NULL); | |
02e3cc70 | 291 | GFS2_ATTR(uuid, 0444, uuid_show, NULL); |
b3b94faa | 292 | GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); |
b3b94faa DT |
293 | GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store); |
294 | GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store); | |
295 | GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store); | |
296 | GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store); | |
297 | GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store); | |
64d576ba | 298 | GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store); |
b3b94faa DT |
299 | |
300 | static struct attribute *gfs2_attrs[] = { | |
301 | &gfs2_attr_id.attr, | |
302 | &gfs2_attr_fsname.attr, | |
02e3cc70 | 303 | &gfs2_attr_uuid.attr, |
b3b94faa | 304 | &gfs2_attr_freeze.attr, |
b3b94faa DT |
305 | &gfs2_attr_withdraw.attr, |
306 | &gfs2_attr_statfs_sync.attr, | |
307 | &gfs2_attr_quota_sync.attr, | |
308 | &gfs2_attr_quota_refresh_user.attr, | |
309 | &gfs2_attr_quota_refresh_group.attr, | |
64d576ba | 310 | &gfs2_attr_demote_rq.attr, |
b3b94faa DT |
311 | NULL, |
312 | }; | |
313 | ||
0d515210 BP |
314 | static void gfs2_sbd_release(struct kobject *kobj) |
315 | { | |
316 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
317 | ||
318 | kfree(sdp); | |
319 | } | |
320 | ||
b3b94faa | 321 | static struct kobj_type gfs2_ktype = { |
0d515210 | 322 | .release = gfs2_sbd_release, |
b3b94faa DT |
323 | .default_attrs = gfs2_attrs, |
324 | .sysfs_ops = &gfs2_attr_ops, | |
325 | }; | |
326 | ||
f057f6cd SW |
327 | |
328 | /* | |
329 | * lock_module. Originally from lock_dlm | |
330 | */ | |
331 | ||
332 | static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf) | |
333 | { | |
334 | const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops; | |
335 | return sprintf(buf, "%s\n", ops->lm_proto_name); | |
336 | } | |
337 | ||
338 | static ssize_t block_show(struct gfs2_sbd *sdp, char *buf) | |
339 | { | |
340 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
341 | ssize_t ret; | |
342 | int val = 0; | |
343 | ||
e0c2a9aa | 344 | if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags)) |
f057f6cd SW |
345 | val = 1; |
346 | ret = sprintf(buf, "%d\n", val); | |
347 | return ret; | |
348 | } | |
349 | ||
350 | static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
351 | { | |
352 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
e50ead48 | 353 | int ret, val; |
f057f6cd | 354 | |
e50ead48 FF |
355 | ret = kstrtoint(buf, 0, &val); |
356 | if (ret) | |
357 | return ret; | |
f057f6cd SW |
358 | |
359 | if (val == 1) | |
e0c2a9aa | 360 | set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
f057f6cd | 361 | else if (val == 0) { |
e0c2a9aa | 362 | clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
4e857c58 | 363 | smp_mb__after_atomic(); |
f057f6cd SW |
364 | gfs2_glock_thaw(sdp); |
365 | } else { | |
e50ead48 | 366 | return -EINVAL; |
f057f6cd | 367 | } |
e50ead48 | 368 | return len; |
f057f6cd SW |
369 | } |
370 | ||
fd95e81c SW |
371 | static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf) |
372 | { | |
373 | int val = completion_done(&sdp->sd_wdack) ? 1 : 0; | |
374 | ||
375 | return sprintf(buf, "%d\n", val); | |
376 | } | |
377 | ||
378 | static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
379 | { | |
e50ead48 | 380 | int ret, val; |
fd95e81c | 381 | |
e50ead48 FF |
382 | ret = kstrtoint(buf, 0, &val); |
383 | if (ret) | |
384 | return ret; | |
fd95e81c SW |
385 | |
386 | if ((val == 1) && | |
387 | !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm")) | |
388 | complete(&sdp->sd_wdack); | |
389 | else | |
e50ead48 FF |
390 | return -EINVAL; |
391 | return len; | |
fd95e81c SW |
392 | } |
393 | ||
f057f6cd SW |
394 | static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) |
395 | { | |
396 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
397 | return sprintf(buf, "%d\n", ls->ls_first); | |
398 | } | |
399 | ||
ba6e9364 SW |
400 | static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
401 | { | |
402 | unsigned first; | |
403 | int rv; | |
404 | ||
405 | rv = sscanf(buf, "%u", &first); | |
406 | if (rv != 1 || first > 1) | |
407 | return -EINVAL; | |
3942ae53 SW |
408 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
409 | if (rv) | |
410 | return rv; | |
ba6e9364 SW |
411 | spin_lock(&sdp->sd_jindex_spin); |
412 | rv = -EBUSY; | |
413 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) | |
414 | goto out; | |
415 | rv = -EINVAL; | |
416 | if (sdp->sd_args.ar_spectator) | |
417 | goto out; | |
418 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) | |
419 | goto out; | |
e0c2a9aa DT |
420 | sdp->sd_lockstruct.ls_first = first; |
421 | rv = 0; | |
ba6e9364 SW |
422 | out: |
423 | spin_unlock(&sdp->sd_jindex_spin); | |
424 | return rv ? rv : len; | |
425 | } | |
426 | ||
f057f6cd SW |
427 | static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) |
428 | { | |
429 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
e0c2a9aa | 430 | return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags)); |
f057f6cd SW |
431 | } |
432 | ||
e0c2a9aa | 433 | int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid) |
f057f6cd SW |
434 | { |
435 | struct gfs2_jdesc *jd; | |
fe64d517 SW |
436 | int rv; |
437 | ||
0e48e055 BP |
438 | /* Wait for our primary journal to be initialized */ |
439 | wait_for_completion(&sdp->sd_journal_ready); | |
440 | ||
f057f6cd | 441 | spin_lock(&sdp->sd_jindex_spin); |
fe64d517 SW |
442 | rv = -EBUSY; |
443 | if (sdp->sd_jdesc->jd_jid == jid) | |
444 | goto out; | |
445 | rv = -ENOENT; | |
f057f6cd SW |
446 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
447 | if (jd->jd_jid != jid) | |
448 | continue; | |
6ecd7c2d | 449 | rv = gfs2_recover_journal(jd, false); |
f057f6cd SW |
450 | break; |
451 | } | |
fe64d517 | 452 | out: |
f057f6cd | 453 | spin_unlock(&sdp->sd_jindex_spin); |
e0c2a9aa DT |
454 | return rv; |
455 | } | |
456 | ||
457 | static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
458 | { | |
459 | unsigned jid; | |
460 | int rv; | |
461 | ||
462 | rv = sscanf(buf, "%u", &jid); | |
463 | if (rv != 1) | |
464 | return -EINVAL; | |
465 | ||
1a058f52 DT |
466 | if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { |
467 | rv = -ESHUTDOWN; | |
468 | goto out; | |
469 | } | |
e0c2a9aa | 470 | |
1a058f52 DT |
471 | rv = gfs2_recover_set(sdp, jid); |
472 | out: | |
fe64d517 | 473 | return rv ? rv : len; |
f057f6cd SW |
474 | } |
475 | ||
476 | static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) | |
477 | { | |
478 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
479 | return sprintf(buf, "%d\n", ls->ls_recover_jid_done); | |
480 | } | |
481 | ||
482 | static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) | |
483 | { | |
484 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
485 | return sprintf(buf, "%d\n", ls->ls_recover_jid_status); | |
486 | } | |
487 | ||
e1b28aab SW |
488 | static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) |
489 | { | |
feb47ca9 | 490 | return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); |
e1b28aab SW |
491 | } |
492 | ||
ba6e9364 SW |
493 | static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
494 | { | |
feb47ca9 | 495 | int jid; |
ba6e9364 SW |
496 | int rv; |
497 | ||
feb47ca9 | 498 | rv = sscanf(buf, "%d", &jid); |
ba6e9364 SW |
499 | if (rv != 1) |
500 | return -EINVAL; | |
3942ae53 SW |
501 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
502 | if (rv) | |
503 | return rv; | |
ba6e9364 SW |
504 | spin_lock(&sdp->sd_jindex_spin); |
505 | rv = -EINVAL; | |
ba6e9364 SW |
506 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
507 | goto out; | |
508 | rv = -EBUSY; | |
feb47ca9 | 509 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) |
ba6e9364 | 510 | goto out; |
feb47ca9 SW |
511 | rv = 0; |
512 | if (sdp->sd_args.ar_spectator && jid > 0) | |
513 | rv = jid = -EINVAL; | |
ba6e9364 | 514 | sdp->sd_lockstruct.ls_jid = jid; |
feb47ca9 | 515 | clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
4e857c58 | 516 | smp_mb__after_atomic(); |
ba6e9364 | 517 | wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); |
ba6e9364 SW |
518 | out: |
519 | spin_unlock(&sdp->sd_jindex_spin); | |
520 | return rv ? rv : len; | |
521 | } | |
522 | ||
f057f6cd | 523 | #define GDLM_ATTR(_name,_mode,_show,_store) \ |
48c2b613 | 524 | static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) |
f057f6cd | 525 | |
d7e623da SW |
526 | GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); |
527 | GDLM_ATTR(block, 0644, block_show, block_store); | |
fd95e81c | 528 | GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store); |
ba6e9364 SW |
529 | GDLM_ATTR(jid, 0644, jid_show, jid_store); |
530 | GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); | |
d7e623da SW |
531 | GDLM_ATTR(first_done, 0444, first_done_show, NULL); |
532 | GDLM_ATTR(recover, 0600, NULL, recover_store); | |
533 | GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); | |
534 | GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); | |
f057f6cd SW |
535 | |
536 | static struct attribute *lock_module_attrs[] = { | |
537 | &gdlm_attr_proto_name.attr, | |
538 | &gdlm_attr_block.attr, | |
539 | &gdlm_attr_withdraw.attr, | |
e1b28aab | 540 | &gdlm_attr_jid.attr, |
f057f6cd SW |
541 | &gdlm_attr_first.attr, |
542 | &gdlm_attr_first_done.attr, | |
543 | &gdlm_attr_recover.attr, | |
544 | &gdlm_attr_recover_done.attr, | |
545 | &gdlm_attr_recover_status.attr, | |
ea67eedb | 546 | NULL, |
b3b94faa DT |
547 | }; |
548 | ||
b3b94faa DT |
549 | /* |
550 | * get and set struct gfs2_tune fields | |
551 | */ | |
552 | ||
553 | static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) | |
554 | { | |
3204a6c0 DT |
555 | return snprintf(buf, PAGE_SIZE, "%u %u\n", |
556 | sdp->sd_tune.gt_quota_scale_num, | |
557 | sdp->sd_tune.gt_quota_scale_den); | |
b3b94faa DT |
558 | } |
559 | ||
560 | static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, | |
561 | size_t len) | |
562 | { | |
563 | struct gfs2_tune *gt = &sdp->sd_tune; | |
564 | unsigned int x, y; | |
565 | ||
566 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 567 | return -EPERM; |
b3b94faa DT |
568 | |
569 | if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) | |
570 | return -EINVAL; | |
571 | ||
572 | spin_lock(>->gt_spin); | |
573 | gt->gt_quota_scale_num = x; | |
574 | gt->gt_quota_scale_den = y; | |
575 | spin_unlock(>->gt_spin); | |
576 | return len; | |
577 | } | |
578 | ||
579 | static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, | |
580 | int check_zero, const char *buf, size_t len) | |
581 | { | |
582 | struct gfs2_tune *gt = &sdp->sd_tune; | |
583 | unsigned int x; | |
e50ead48 | 584 | int error; |
b3b94faa DT |
585 | |
586 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 587 | return -EPERM; |
b3b94faa | 588 | |
e50ead48 FF |
589 | error = kstrtouint(buf, 0, &x); |
590 | if (error) | |
591 | return error; | |
b3b94faa DT |
592 | |
593 | if (check_zero && !x) | |
594 | return -EINVAL; | |
595 | ||
596 | spin_lock(>->gt_spin); | |
597 | *field = x; | |
598 | spin_unlock(>->gt_spin); | |
599 | return len; | |
600 | } | |
601 | ||
b3b94faa | 602 | #define TUNE_ATTR_3(name, show, store) \ |
48c2b613 | 603 | static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) |
b3b94faa DT |
604 | |
605 | #define TUNE_ATTR_2(name, store) \ | |
606 | static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ | |
607 | { \ | |
3204a6c0 | 608 | return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ |
b3b94faa DT |
609 | } \ |
610 | TUNE_ATTR_3(name, name##_show, store) | |
611 | ||
612 | #define TUNE_ATTR(name, check_zero) \ | |
613 | static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ | |
614 | { \ | |
615 | return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ | |
616 | } \ | |
617 | TUNE_ATTR_2(name, name##_store) | |
618 | ||
b3b94faa DT |
619 | TUNE_ATTR(quota_warn_period, 0); |
620 | TUNE_ATTR(quota_quantum, 0); | |
b3b94faa DT |
621 | TUNE_ATTR(max_readahead, 0); |
622 | TUNE_ATTR(complain_secs, 0); | |
b3b94faa DT |
623 | TUNE_ATTR(statfs_slow, 0); |
624 | TUNE_ATTR(new_files_jdata, 0); | |
b3b94faa | 625 | TUNE_ATTR(statfs_quantum, 1); |
b3b94faa DT |
626 | TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); |
627 | ||
628 | static struct attribute *tune_attrs[] = { | |
b3b94faa DT |
629 | &tune_attr_quota_warn_period.attr, |
630 | &tune_attr_quota_quantum.attr, | |
b3b94faa DT |
631 | &tune_attr_max_readahead.attr, |
632 | &tune_attr_complain_secs.attr, | |
b3b94faa | 633 | &tune_attr_statfs_slow.attr, |
b3b94faa | 634 | &tune_attr_statfs_quantum.attr, |
b3b94faa DT |
635 | &tune_attr_quota_scale.attr, |
636 | &tune_attr_new_files_jdata.attr, | |
ea67eedb | 637 | NULL, |
b3b94faa DT |
638 | }; |
639 | ||
b3b94faa DT |
640 | static struct attribute_group tune_group = { |
641 | .name = "tune", | |
ea67eedb | 642 | .attrs = tune_attrs, |
b3b94faa DT |
643 | }; |
644 | ||
f057f6cd SW |
645 | static struct attribute_group lock_module_group = { |
646 | .name = "lock_module", | |
647 | .attrs = lock_module_attrs, | |
648 | }; | |
649 | ||
b3b94faa DT |
650 | int gfs2_sys_fs_add(struct gfs2_sbd *sdp) |
651 | { | |
440d6da2 | 652 | struct super_block *sb = sdp->sd_vfs; |
b3b94faa | 653 | int error; |
440d6da2 SW |
654 | char ro[20]; |
655 | char spectator[20]; | |
656 | char *envp[] = { ro, spectator, NULL }; | |
0d515210 | 657 | int sysfs_frees_sdp = 0; |
440d6da2 SW |
658 | |
659 | sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0); | |
660 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); | |
b3b94faa | 661 | |
9bec101a | 662 | sdp->sd_kobj.kset = gfs2_kset; |
901195ed GKH |
663 | error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, |
664 | "%s", sdp->sd_table_name); | |
b3b94faa | 665 | if (error) |
0d515210 | 666 | goto fail_reg; |
b3b94faa | 667 | |
0d515210 BP |
668 | sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling |
669 | function gfs2_sbd_release. */ | |
b3b94faa DT |
670 | error = sysfs_create_group(&sdp->sd_kobj, &tune_group); |
671 | if (error) | |
f6eb5349 | 672 | goto fail_reg; |
b3b94faa | 673 | |
f057f6cd SW |
674 | error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); |
675 | if (error) | |
676 | goto fail_tune; | |
677 | ||
31e54b01 SW |
678 | error = sysfs_create_link(&sdp->sd_kobj, |
679 | &disk_to_dev(sb->s_bdev->bd_disk)->kobj, | |
680 | "device"); | |
681 | if (error) | |
682 | goto fail_lock_module; | |
683 | ||
440d6da2 | 684 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); |
b3b94faa DT |
685 | return 0; |
686 | ||
31e54b01 SW |
687 | fail_lock_module: |
688 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); | |
f057f6cd SW |
689 | fail_tune: |
690 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); | |
a91ea69f | 691 | fail_reg: |
0d515210 | 692 | free_percpu(sdp->sd_lkstats); |
65952fb4 | 693 | fs_err(sdp, "error %d adding sysfs files", error); |
0d515210 BP |
694 | if (sysfs_frees_sdp) |
695 | kobject_put(&sdp->sd_kobj); | |
696 | else | |
697 | kfree(sdp); | |
698 | sb->s_fs_info = NULL; | |
b3b94faa DT |
699 | return error; |
700 | } | |
701 | ||
702 | void gfs2_sys_fs_del(struct gfs2_sbd *sdp) | |
703 | { | |
31e54b01 | 704 | sysfs_remove_link(&sdp->sd_kobj, "device"); |
b3b94faa | 705 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); |
f057f6cd | 706 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); |
197b12d6 | 707 | kobject_put(&sdp->sd_kobj); |
b3b94faa DT |
708 | } |
709 | ||
fdd1062e SW |
710 | static int gfs2_uevent(struct kset *kset, struct kobject *kobj, |
711 | struct kobj_uevent_env *env) | |
712 | { | |
713 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
32e471ef SW |
714 | struct super_block *s = sdp->sd_vfs; |
715 | const u8 *uuid = s->s_uuid; | |
02e3cc70 | 716 | |
fdd1062e SW |
717 | add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); |
718 | add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); | |
ba6e9364 | 719 | if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
feb47ca9 | 720 | add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); |
f0b34ae6 JP |
721 | if (gfs2_uuid_valid(uuid)) |
722 | add_uevent_var(env, "UUID=%pUB", uuid); | |
fdd1062e SW |
723 | return 0; |
724 | } | |
725 | ||
9cd43611 | 726 | static const struct kset_uevent_ops gfs2_uevent_ops = { |
fdd1062e SW |
727 | .uevent = gfs2_uevent, |
728 | }; | |
729 | ||
b3b94faa DT |
730 | int gfs2_sys_init(void) |
731 | { | |
fdd1062e | 732 | gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); |
9bec101a GKH |
733 | if (!gfs2_kset) |
734 | return -ENOMEM; | |
735 | return 0; | |
b3b94faa DT |
736 | } |
737 | ||
738 | void gfs2_sys_uninit(void) | |
739 | { | |
9bec101a | 740 | kset_unregister(gfs2_kset); |
b3b94faa DT |
741 | } |
742 |