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Commit | Line | Data |
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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> |
b3b94faa DT |
13 | #include <linux/spinlock.h> |
14 | #include <linux/completion.h> | |
15 | #include <linux/buffer_head.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/kobject.h> | |
b3b94faa | 18 | #include <asm/uaccess.h> |
f057f6cd | 19 | #include <linux/gfs2_ondisk.h> |
31e54b01 | 20 | #include <linux/genhd.h> |
b3b94faa DT |
21 | |
22 | #include "gfs2.h" | |
5c676f6d | 23 | #include "incore.h" |
b3b94faa DT |
24 | #include "sys.h" |
25 | #include "super.h" | |
26 | #include "glock.h" | |
27 | #include "quota.h" | |
5c676f6d | 28 | #include "util.h" |
64d576ba | 29 | #include "glops.h" |
6ecd7c2d | 30 | #include "recovery.h" |
b3b94faa | 31 | |
48c2b613 SW |
32 | struct gfs2_attr { |
33 | struct attribute attr; | |
34 | ssize_t (*show)(struct gfs2_sbd *, char *); | |
35 | ssize_t (*store)(struct gfs2_sbd *, const char *, size_t); | |
36 | }; | |
37 | ||
38 | static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr, | |
39 | char *buf) | |
40 | { | |
41 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
42 | struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr); | |
43 | return a->show ? a->show(sdp, buf) : 0; | |
44 | } | |
45 | ||
46 | static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr, | |
47 | const char *buf, size_t len) | |
48 | { | |
49 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
50 | struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr); | |
51 | return a->store ? a->store(sdp, buf, len) : len; | |
52 | } | |
53 | ||
52cf25d0 | 54 | static const struct sysfs_ops gfs2_attr_ops = { |
48c2b613 SW |
55 | .show = gfs2_attr_show, |
56 | .store = gfs2_attr_store, | |
57 | }; | |
58 | ||
59 | ||
60 | static struct kset *gfs2_kset; | |
61 | ||
b3b94faa DT |
62 | static ssize_t id_show(struct gfs2_sbd *sdp, char *buf) |
63 | { | |
c7227e46 BP |
64 | return snprintf(buf, PAGE_SIZE, "%u:%u\n", |
65 | MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev)); | |
b3b94faa DT |
66 | } |
67 | ||
68 | static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf) | |
69 | { | |
3204a6c0 | 70 | return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname); |
b3b94faa DT |
71 | } |
72 | ||
02e3cc70 SW |
73 | static int gfs2_uuid_valid(const u8 *uuid) |
74 | { | |
75 | int i; | |
76 | ||
77 | for (i = 0; i < 16; i++) { | |
78 | if (uuid[i]) | |
79 | return 1; | |
80 | } | |
81 | return 0; | |
82 | } | |
83 | ||
84 | static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf) | |
85 | { | |
32e471ef SW |
86 | struct super_block *s = sdp->sd_vfs; |
87 | const u8 *uuid = s->s_uuid; | |
02e3cc70 SW |
88 | buf[0] = '\0'; |
89 | if (!gfs2_uuid_valid(uuid)) | |
90 | return 0; | |
f0b34ae6 | 91 | return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid); |
02e3cc70 SW |
92 | } |
93 | ||
b3b94faa DT |
94 | static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf) |
95 | { | |
d564053f SW |
96 | struct super_block *sb = sdp->sd_vfs; |
97 | int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1; | |
b3b94faa | 98 | |
3566c964 | 99 | return snprintf(buf, PAGE_SIZE, "%d\n", frozen); |
b3b94faa DT |
100 | } |
101 | ||
102 | static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
103 | { | |
e50ead48 FF |
104 | int error, n; |
105 | ||
106 | error = kstrtoint(buf, 0, &n); | |
107 | if (error) | |
108 | return error; | |
b3b94faa DT |
109 | |
110 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 111 | return -EPERM; |
b3b94faa DT |
112 | |
113 | switch (n) { | |
114 | case 0: | |
d564053f | 115 | error = thaw_super(sdp->sd_vfs); |
b3b94faa DT |
116 | break; |
117 | case 1: | |
d564053f | 118 | error = freeze_super(sdp->sd_vfs); |
b3b94faa DT |
119 | break; |
120 | default: | |
d564053f | 121 | return -EINVAL; |
b3b94faa DT |
122 | } |
123 | ||
d564053f | 124 | if (error) { |
b3b94faa | 125 | fs_warn(sdp, "freeze %d error %d", n, error); |
d564053f SW |
126 | return error; |
127 | } | |
b3b94faa | 128 | |
d564053f | 129 | return len; |
b3b94faa DT |
130 | } |
131 | ||
132 | static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf) | |
133 | { | |
134 | unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags); | |
3204a6c0 | 135 | return snprintf(buf, PAGE_SIZE, "%u\n", b); |
b3b94faa DT |
136 | } |
137 | ||
138 | static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
139 | { | |
e50ead48 FF |
140 | int error, val; |
141 | ||
b3b94faa | 142 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 143 | return -EPERM; |
b3b94faa | 144 | |
e50ead48 FF |
145 | error = kstrtoint(buf, 0, &val); |
146 | if (error) | |
147 | return error; | |
148 | ||
149 | if (val != 1) | |
b3b94faa DT |
150 | return -EINVAL; |
151 | ||
cb94eb06 JP |
152 | gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n"); |
153 | ||
b3b94faa DT |
154 | return len; |
155 | } | |
156 | ||
157 | static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf, | |
158 | size_t len) | |
159 | { | |
e50ead48 FF |
160 | int error, val; |
161 | ||
b3b94faa | 162 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 163 | return -EPERM; |
b3b94faa | 164 | |
e50ead48 FF |
165 | error = kstrtoint(buf, 0, &val); |
166 | if (error) | |
167 | return error; | |
168 | ||
169 | if (val != 1) | |
b3b94faa DT |
170 | return -EINVAL; |
171 | ||
8c42d637 | 172 | gfs2_statfs_sync(sdp->sd_vfs, 0); |
b3b94faa DT |
173 | return len; |
174 | } | |
175 | ||
b3b94faa DT |
176 | static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf, |
177 | size_t len) | |
178 | { | |
e50ead48 FF |
179 | int error, val; |
180 | ||
b3b94faa | 181 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 182 | return -EPERM; |
b3b94faa | 183 | |
e50ead48 FF |
184 | error = kstrtoint(buf, 0, &val); |
185 | if (error) | |
186 | return error; | |
187 | ||
188 | if (val != 1) | |
b3b94faa DT |
189 | return -EINVAL; |
190 | ||
ceed1723 | 191 | gfs2_quota_sync(sdp->sd_vfs, 0); |
b3b94faa DT |
192 | return len; |
193 | } | |
194 | ||
195 | static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf, | |
196 | size_t len) | |
197 | { | |
ed87dabc | 198 | struct kqid qid; |
ea762338 | 199 | int error; |
cd915493 | 200 | u32 id; |
b3b94faa DT |
201 | |
202 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 203 | return -EPERM; |
b3b94faa | 204 | |
e50ead48 FF |
205 | error = kstrtou32(buf, 0, &id); |
206 | if (error) | |
207 | return error; | |
b3b94faa | 208 | |
ed87dabc EB |
209 | qid = make_kqid(current_user_ns(), USRQUOTA, id); |
210 | if (!qid_valid(qid)) | |
211 | return -EINVAL; | |
212 | ||
213 | error = gfs2_quota_refresh(sdp, qid); | |
ea762338 | 214 | return error ? error : len; |
b3b94faa DT |
215 | } |
216 | ||
217 | static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, | |
218 | size_t len) | |
219 | { | |
ed87dabc | 220 | struct kqid qid; |
ea762338 | 221 | int error; |
cd915493 | 222 | u32 id; |
b3b94faa DT |
223 | |
224 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 225 | return -EPERM; |
b3b94faa | 226 | |
e50ead48 FF |
227 | error = kstrtou32(buf, 0, &id); |
228 | if (error) | |
229 | return error; | |
b3b94faa | 230 | |
ed87dabc EB |
231 | qid = make_kqid(current_user_ns(), GRPQUOTA, id); |
232 | if (!qid_valid(qid)) | |
233 | return -EINVAL; | |
234 | ||
235 | error = gfs2_quota_refresh(sdp, qid); | |
ea762338 | 236 | return error ? error : len; |
b3b94faa DT |
237 | } |
238 | ||
64d576ba SW |
239 | static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
240 | { | |
241 | struct gfs2_glock *gl; | |
242 | const struct gfs2_glock_operations *glops; | |
243 | unsigned int glmode; | |
244 | unsigned int gltype; | |
245 | unsigned long long glnum; | |
246 | char mode[16]; | |
247 | int rv; | |
248 | ||
249 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 250 | return -EPERM; |
64d576ba SW |
251 | |
252 | rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum, | |
253 | mode); | |
254 | if (rv != 3) | |
255 | return -EINVAL; | |
256 | ||
257 | if (strcmp(mode, "EX") == 0) | |
258 | glmode = LM_ST_UNLOCKED; | |
259 | else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0)) | |
260 | glmode = LM_ST_DEFERRED; | |
261 | else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0)) | |
262 | glmode = LM_ST_SHARED; | |
263 | else | |
264 | return -EINVAL; | |
265 | ||
266 | if (gltype > LM_TYPE_JOURNAL) | |
267 | return -EINVAL; | |
24972557 BM |
268 | if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK) |
269 | glops = &gfs2_freeze_glops; | |
13466985 SW |
270 | else |
271 | glops = gfs2_glops_list[gltype]; | |
64d576ba SW |
272 | if (glops == NULL) |
273 | return -EINVAL; | |
6a99be5d | 274 | if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags)) |
913a71d2 | 275 | fs_info(sdp, "demote interface used\n"); |
64d576ba SW |
276 | rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl); |
277 | if (rv) | |
278 | return rv; | |
279 | gfs2_glock_cb(gl, glmode); | |
280 | gfs2_glock_put(gl); | |
281 | return len; | |
282 | } | |
283 | ||
b3b94faa DT |
284 | |
285 | #define GFS2_ATTR(name, mode, show, store) \ | |
286 | static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) | |
287 | ||
288 | GFS2_ATTR(id, 0444, id_show, NULL); | |
289 | GFS2_ATTR(fsname, 0444, fsname_show, NULL); | |
02e3cc70 | 290 | GFS2_ATTR(uuid, 0444, uuid_show, NULL); |
b3b94faa | 291 | GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); |
b3b94faa DT |
292 | GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store); |
293 | GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store); | |
294 | GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store); | |
295 | GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store); | |
296 | GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store); | |
64d576ba | 297 | GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store); |
b3b94faa DT |
298 | |
299 | static struct attribute *gfs2_attrs[] = { | |
300 | &gfs2_attr_id.attr, | |
301 | &gfs2_attr_fsname.attr, | |
02e3cc70 | 302 | &gfs2_attr_uuid.attr, |
b3b94faa | 303 | &gfs2_attr_freeze.attr, |
b3b94faa DT |
304 | &gfs2_attr_withdraw.attr, |
305 | &gfs2_attr_statfs_sync.attr, | |
306 | &gfs2_attr_quota_sync.attr, | |
307 | &gfs2_attr_quota_refresh_user.attr, | |
308 | &gfs2_attr_quota_refresh_group.attr, | |
64d576ba | 309 | &gfs2_attr_demote_rq.attr, |
b3b94faa DT |
310 | NULL, |
311 | }; | |
312 | ||
0d515210 BP |
313 | static void gfs2_sbd_release(struct kobject *kobj) |
314 | { | |
315 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
316 | ||
317 | kfree(sdp); | |
318 | } | |
319 | ||
b3b94faa | 320 | static struct kobj_type gfs2_ktype = { |
0d515210 | 321 | .release = gfs2_sbd_release, |
b3b94faa DT |
322 | .default_attrs = gfs2_attrs, |
323 | .sysfs_ops = &gfs2_attr_ops, | |
324 | }; | |
325 | ||
f057f6cd SW |
326 | |
327 | /* | |
328 | * lock_module. Originally from lock_dlm | |
329 | */ | |
330 | ||
331 | static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf) | |
332 | { | |
333 | const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops; | |
334 | return sprintf(buf, "%s\n", ops->lm_proto_name); | |
335 | } | |
336 | ||
337 | static ssize_t block_show(struct gfs2_sbd *sdp, char *buf) | |
338 | { | |
339 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
340 | ssize_t ret; | |
341 | int val = 0; | |
342 | ||
e0c2a9aa | 343 | if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags)) |
f057f6cd SW |
344 | val = 1; |
345 | ret = sprintf(buf, "%d\n", val); | |
346 | return ret; | |
347 | } | |
348 | ||
349 | static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
350 | { | |
351 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
e50ead48 | 352 | int ret, val; |
f057f6cd | 353 | |
e50ead48 FF |
354 | ret = kstrtoint(buf, 0, &val); |
355 | if (ret) | |
356 | return ret; | |
f057f6cd SW |
357 | |
358 | if (val == 1) | |
e0c2a9aa | 359 | set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
f057f6cd | 360 | else if (val == 0) { |
e0c2a9aa | 361 | clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
4e857c58 | 362 | smp_mb__after_atomic(); |
f057f6cd SW |
363 | gfs2_glock_thaw(sdp); |
364 | } else { | |
e50ead48 | 365 | return -EINVAL; |
f057f6cd | 366 | } |
e50ead48 | 367 | return len; |
f057f6cd SW |
368 | } |
369 | ||
fd95e81c SW |
370 | static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf) |
371 | { | |
372 | int val = completion_done(&sdp->sd_wdack) ? 1 : 0; | |
373 | ||
374 | return sprintf(buf, "%d\n", val); | |
375 | } | |
376 | ||
377 | static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
378 | { | |
e50ead48 | 379 | int ret, val; |
fd95e81c | 380 | |
e50ead48 FF |
381 | ret = kstrtoint(buf, 0, &val); |
382 | if (ret) | |
383 | return ret; | |
fd95e81c SW |
384 | |
385 | if ((val == 1) && | |
386 | !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm")) | |
387 | complete(&sdp->sd_wdack); | |
388 | else | |
e50ead48 FF |
389 | return -EINVAL; |
390 | return len; | |
fd95e81c SW |
391 | } |
392 | ||
f057f6cd SW |
393 | static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) |
394 | { | |
395 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
396 | return sprintf(buf, "%d\n", ls->ls_first); | |
397 | } | |
398 | ||
ba6e9364 SW |
399 | static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
400 | { | |
401 | unsigned first; | |
402 | int rv; | |
403 | ||
404 | rv = sscanf(buf, "%u", &first); | |
405 | if (rv != 1 || first > 1) | |
406 | return -EINVAL; | |
3942ae53 SW |
407 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
408 | if (rv) | |
409 | return rv; | |
ba6e9364 SW |
410 | spin_lock(&sdp->sd_jindex_spin); |
411 | rv = -EBUSY; | |
412 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) | |
413 | goto out; | |
414 | rv = -EINVAL; | |
415 | if (sdp->sd_args.ar_spectator) | |
416 | goto out; | |
417 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) | |
418 | goto out; | |
e0c2a9aa DT |
419 | sdp->sd_lockstruct.ls_first = first; |
420 | rv = 0; | |
ba6e9364 SW |
421 | out: |
422 | spin_unlock(&sdp->sd_jindex_spin); | |
423 | return rv ? rv : len; | |
424 | } | |
425 | ||
f057f6cd SW |
426 | static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) |
427 | { | |
428 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
e0c2a9aa | 429 | return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags)); |
f057f6cd SW |
430 | } |
431 | ||
e0c2a9aa | 432 | int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid) |
f057f6cd SW |
433 | { |
434 | struct gfs2_jdesc *jd; | |
fe64d517 SW |
435 | int rv; |
436 | ||
0e48e055 BP |
437 | /* Wait for our primary journal to be initialized */ |
438 | wait_for_completion(&sdp->sd_journal_ready); | |
439 | ||
f057f6cd | 440 | spin_lock(&sdp->sd_jindex_spin); |
fe64d517 SW |
441 | rv = -EBUSY; |
442 | if (sdp->sd_jdesc->jd_jid == jid) | |
443 | goto out; | |
444 | rv = -ENOENT; | |
f057f6cd SW |
445 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
446 | if (jd->jd_jid != jid) | |
447 | continue; | |
6ecd7c2d | 448 | rv = gfs2_recover_journal(jd, false); |
f057f6cd SW |
449 | break; |
450 | } | |
fe64d517 | 451 | out: |
f057f6cd | 452 | spin_unlock(&sdp->sd_jindex_spin); |
e0c2a9aa DT |
453 | return rv; |
454 | } | |
455 | ||
456 | static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
457 | { | |
458 | unsigned jid; | |
459 | int rv; | |
460 | ||
461 | rv = sscanf(buf, "%u", &jid); | |
462 | if (rv != 1) | |
463 | return -EINVAL; | |
464 | ||
1a058f52 DT |
465 | if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { |
466 | rv = -ESHUTDOWN; | |
467 | goto out; | |
468 | } | |
e0c2a9aa | 469 | |
1a058f52 DT |
470 | rv = gfs2_recover_set(sdp, jid); |
471 | out: | |
fe64d517 | 472 | return rv ? rv : len; |
f057f6cd SW |
473 | } |
474 | ||
475 | static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) | |
476 | { | |
477 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
478 | return sprintf(buf, "%d\n", ls->ls_recover_jid_done); | |
479 | } | |
480 | ||
481 | static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) | |
482 | { | |
483 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
484 | return sprintf(buf, "%d\n", ls->ls_recover_jid_status); | |
485 | } | |
486 | ||
e1b28aab SW |
487 | static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) |
488 | { | |
feb47ca9 | 489 | return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); |
e1b28aab SW |
490 | } |
491 | ||
ba6e9364 SW |
492 | static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
493 | { | |
feb47ca9 | 494 | int jid; |
ba6e9364 SW |
495 | int rv; |
496 | ||
feb47ca9 | 497 | rv = sscanf(buf, "%d", &jid); |
ba6e9364 SW |
498 | if (rv != 1) |
499 | return -EINVAL; | |
3942ae53 SW |
500 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
501 | if (rv) | |
502 | return rv; | |
ba6e9364 SW |
503 | spin_lock(&sdp->sd_jindex_spin); |
504 | rv = -EINVAL; | |
ba6e9364 SW |
505 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
506 | goto out; | |
507 | rv = -EBUSY; | |
feb47ca9 | 508 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) |
ba6e9364 | 509 | goto out; |
feb47ca9 SW |
510 | rv = 0; |
511 | if (sdp->sd_args.ar_spectator && jid > 0) | |
512 | rv = jid = -EINVAL; | |
ba6e9364 | 513 | sdp->sd_lockstruct.ls_jid = jid; |
feb47ca9 | 514 | clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
4e857c58 | 515 | smp_mb__after_atomic(); |
ba6e9364 | 516 | wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); |
ba6e9364 SW |
517 | out: |
518 | spin_unlock(&sdp->sd_jindex_spin); | |
519 | return rv ? rv : len; | |
520 | } | |
521 | ||
f057f6cd | 522 | #define GDLM_ATTR(_name,_mode,_show,_store) \ |
48c2b613 | 523 | static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) |
f057f6cd | 524 | |
d7e623da SW |
525 | GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); |
526 | GDLM_ATTR(block, 0644, block_show, block_store); | |
fd95e81c | 527 | GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store); |
ba6e9364 SW |
528 | GDLM_ATTR(jid, 0644, jid_show, jid_store); |
529 | GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); | |
d7e623da SW |
530 | GDLM_ATTR(first_done, 0444, first_done_show, NULL); |
531 | GDLM_ATTR(recover, 0600, NULL, recover_store); | |
532 | GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); | |
533 | GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); | |
f057f6cd SW |
534 | |
535 | static struct attribute *lock_module_attrs[] = { | |
536 | &gdlm_attr_proto_name.attr, | |
537 | &gdlm_attr_block.attr, | |
538 | &gdlm_attr_withdraw.attr, | |
e1b28aab | 539 | &gdlm_attr_jid.attr, |
f057f6cd SW |
540 | &gdlm_attr_first.attr, |
541 | &gdlm_attr_first_done.attr, | |
542 | &gdlm_attr_recover.attr, | |
543 | &gdlm_attr_recover_done.attr, | |
544 | &gdlm_attr_recover_status.attr, | |
ea67eedb | 545 | NULL, |
b3b94faa DT |
546 | }; |
547 | ||
b3b94faa DT |
548 | /* |
549 | * get and set struct gfs2_tune fields | |
550 | */ | |
551 | ||
552 | static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) | |
553 | { | |
3204a6c0 DT |
554 | return snprintf(buf, PAGE_SIZE, "%u %u\n", |
555 | sdp->sd_tune.gt_quota_scale_num, | |
556 | sdp->sd_tune.gt_quota_scale_den); | |
b3b94faa DT |
557 | } |
558 | ||
559 | static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, | |
560 | size_t len) | |
561 | { | |
562 | struct gfs2_tune *gt = &sdp->sd_tune; | |
563 | unsigned int x, y; | |
564 | ||
565 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 566 | return -EPERM; |
b3b94faa DT |
567 | |
568 | if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) | |
569 | return -EINVAL; | |
570 | ||
571 | spin_lock(>->gt_spin); | |
572 | gt->gt_quota_scale_num = x; | |
573 | gt->gt_quota_scale_den = y; | |
574 | spin_unlock(>->gt_spin); | |
575 | return len; | |
576 | } | |
577 | ||
578 | static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, | |
579 | int check_zero, const char *buf, size_t len) | |
580 | { | |
581 | struct gfs2_tune *gt = &sdp->sd_tune; | |
582 | unsigned int x; | |
e50ead48 | 583 | int error; |
b3b94faa DT |
584 | |
585 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 586 | return -EPERM; |
b3b94faa | 587 | |
e50ead48 FF |
588 | error = kstrtouint(buf, 0, &x); |
589 | if (error) | |
590 | return error; | |
b3b94faa DT |
591 | |
592 | if (check_zero && !x) | |
593 | return -EINVAL; | |
594 | ||
595 | spin_lock(>->gt_spin); | |
596 | *field = x; | |
597 | spin_unlock(>->gt_spin); | |
598 | return len; | |
599 | } | |
600 | ||
b3b94faa | 601 | #define TUNE_ATTR_3(name, show, store) \ |
48c2b613 | 602 | static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) |
b3b94faa DT |
603 | |
604 | #define TUNE_ATTR_2(name, store) \ | |
605 | static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ | |
606 | { \ | |
3204a6c0 | 607 | return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ |
b3b94faa DT |
608 | } \ |
609 | TUNE_ATTR_3(name, name##_show, store) | |
610 | ||
611 | #define TUNE_ATTR(name, check_zero) \ | |
612 | static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ | |
613 | { \ | |
614 | return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ | |
615 | } \ | |
616 | TUNE_ATTR_2(name, name##_store) | |
617 | ||
b3b94faa DT |
618 | TUNE_ATTR(quota_warn_period, 0); |
619 | TUNE_ATTR(quota_quantum, 0); | |
b3b94faa DT |
620 | TUNE_ATTR(max_readahead, 0); |
621 | TUNE_ATTR(complain_secs, 0); | |
b3b94faa DT |
622 | TUNE_ATTR(statfs_slow, 0); |
623 | TUNE_ATTR(new_files_jdata, 0); | |
b3b94faa | 624 | TUNE_ATTR(statfs_quantum, 1); |
b3b94faa DT |
625 | TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); |
626 | ||
627 | static struct attribute *tune_attrs[] = { | |
b3b94faa DT |
628 | &tune_attr_quota_warn_period.attr, |
629 | &tune_attr_quota_quantum.attr, | |
b3b94faa DT |
630 | &tune_attr_max_readahead.attr, |
631 | &tune_attr_complain_secs.attr, | |
b3b94faa | 632 | &tune_attr_statfs_slow.attr, |
b3b94faa | 633 | &tune_attr_statfs_quantum.attr, |
b3b94faa DT |
634 | &tune_attr_quota_scale.attr, |
635 | &tune_attr_new_files_jdata.attr, | |
ea67eedb | 636 | NULL, |
b3b94faa DT |
637 | }; |
638 | ||
b3b94faa DT |
639 | static struct attribute_group tune_group = { |
640 | .name = "tune", | |
ea67eedb | 641 | .attrs = tune_attrs, |
b3b94faa DT |
642 | }; |
643 | ||
f057f6cd SW |
644 | static struct attribute_group lock_module_group = { |
645 | .name = "lock_module", | |
646 | .attrs = lock_module_attrs, | |
647 | }; | |
648 | ||
b3b94faa DT |
649 | int gfs2_sys_fs_add(struct gfs2_sbd *sdp) |
650 | { | |
440d6da2 | 651 | struct super_block *sb = sdp->sd_vfs; |
b3b94faa | 652 | int error; |
440d6da2 SW |
653 | char ro[20]; |
654 | char spectator[20]; | |
655 | char *envp[] = { ro, spectator, NULL }; | |
0d515210 | 656 | int sysfs_frees_sdp = 0; |
440d6da2 SW |
657 | |
658 | sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0); | |
659 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); | |
b3b94faa | 660 | |
9bec101a | 661 | sdp->sd_kobj.kset = gfs2_kset; |
901195ed GKH |
662 | error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, |
663 | "%s", sdp->sd_table_name); | |
b3b94faa | 664 | if (error) |
0d515210 | 665 | goto fail_reg; |
b3b94faa | 666 | |
0d515210 BP |
667 | sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling |
668 | function gfs2_sbd_release. */ | |
b3b94faa DT |
669 | error = sysfs_create_group(&sdp->sd_kobj, &tune_group); |
670 | if (error) | |
f6eb5349 | 671 | goto fail_reg; |
b3b94faa | 672 | |
f057f6cd SW |
673 | error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); |
674 | if (error) | |
675 | goto fail_tune; | |
676 | ||
31e54b01 SW |
677 | error = sysfs_create_link(&sdp->sd_kobj, |
678 | &disk_to_dev(sb->s_bdev->bd_disk)->kobj, | |
679 | "device"); | |
680 | if (error) | |
681 | goto fail_lock_module; | |
682 | ||
440d6da2 | 683 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); |
b3b94faa DT |
684 | return 0; |
685 | ||
31e54b01 SW |
686 | fail_lock_module: |
687 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); | |
f057f6cd SW |
688 | fail_tune: |
689 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); | |
a91ea69f | 690 | fail_reg: |
0d515210 | 691 | free_percpu(sdp->sd_lkstats); |
65952fb4 | 692 | fs_err(sdp, "error %d adding sysfs files", error); |
0d515210 BP |
693 | if (sysfs_frees_sdp) |
694 | kobject_put(&sdp->sd_kobj); | |
695 | else | |
696 | kfree(sdp); | |
697 | sb->s_fs_info = NULL; | |
b3b94faa DT |
698 | return error; |
699 | } | |
700 | ||
701 | void gfs2_sys_fs_del(struct gfs2_sbd *sdp) | |
702 | { | |
31e54b01 | 703 | sysfs_remove_link(&sdp->sd_kobj, "device"); |
b3b94faa | 704 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); |
f057f6cd | 705 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); |
197b12d6 | 706 | kobject_put(&sdp->sd_kobj); |
b3b94faa DT |
707 | } |
708 | ||
fdd1062e SW |
709 | static int gfs2_uevent(struct kset *kset, struct kobject *kobj, |
710 | struct kobj_uevent_env *env) | |
711 | { | |
712 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
32e471ef SW |
713 | struct super_block *s = sdp->sd_vfs; |
714 | const u8 *uuid = s->s_uuid; | |
02e3cc70 | 715 | |
fdd1062e SW |
716 | add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); |
717 | add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); | |
ba6e9364 | 718 | if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
feb47ca9 | 719 | add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); |
f0b34ae6 JP |
720 | if (gfs2_uuid_valid(uuid)) |
721 | add_uevent_var(env, "UUID=%pUB", uuid); | |
fdd1062e SW |
722 | return 0; |
723 | } | |
724 | ||
9cd43611 | 725 | static const struct kset_uevent_ops gfs2_uevent_ops = { |
fdd1062e SW |
726 | .uevent = gfs2_uevent, |
727 | }; | |
728 | ||
b3b94faa DT |
729 | int gfs2_sys_init(void) |
730 | { | |
fdd1062e | 731 | gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); |
9bec101a GKH |
732 | if (!gfs2_kset) |
733 | return -ENOMEM; | |
734 | return 0; | |
b3b94faa DT |
735 | } |
736 | ||
737 | void gfs2_sys_uninit(void) | |
738 | { | |
9bec101a | 739 | kset_unregister(gfs2_kset); |
b3b94faa DT |
740 | } |
741 |