Commit | Line | Data |
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7336d0e6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b3b94faa DT |
2 | /* |
3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 4 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
5 | */ |
6 | ||
d77d1b58 JP |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
8 | ||
b3b94faa | 9 | #include <linux/sched.h> |
5b825c3a | 10 | #include <linux/cred.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> | |
7c0f6ba6 | 16 | #include <linux/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 ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf) |
72 | { | |
32e471ef | 73 | struct super_block *s = sdp->sd_vfs; |
85787090 | 74 | |
02e3cc70 | 75 | buf[0] = '\0'; |
85787090 | 76 | if (uuid_is_null(&s->s_uuid)) |
02e3cc70 | 77 | return 0; |
85787090 | 78 | return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid); |
02e3cc70 SW |
79 | } |
80 | ||
b3b94faa DT |
81 | static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf) |
82 | { | |
d564053f SW |
83 | struct super_block *sb = sdp->sd_vfs; |
84 | int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1; | |
b3b94faa | 85 | |
3566c964 | 86 | return snprintf(buf, PAGE_SIZE, "%d\n", frozen); |
b3b94faa DT |
87 | } |
88 | ||
89 | static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
90 | { | |
e50ead48 FF |
91 | int error, n; |
92 | ||
93 | error = kstrtoint(buf, 0, &n); | |
94 | if (error) | |
95 | return error; | |
b3b94faa DT |
96 | |
97 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 98 | return -EPERM; |
b3b94faa DT |
99 | |
100 | switch (n) { | |
101 | case 0: | |
d564053f | 102 | error = thaw_super(sdp->sd_vfs); |
b3b94faa DT |
103 | break; |
104 | case 1: | |
d564053f | 105 | error = freeze_super(sdp->sd_vfs); |
b3b94faa DT |
106 | break; |
107 | default: | |
d564053f | 108 | return -EINVAL; |
b3b94faa DT |
109 | } |
110 | ||
d564053f | 111 | if (error) { |
af38816e | 112 | fs_warn(sdp, "freeze %d error %d\n", n, error); |
d564053f SW |
113 | return error; |
114 | } | |
b3b94faa | 115 | |
d564053f | 116 | return len; |
b3b94faa DT |
117 | } |
118 | ||
119 | static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf) | |
120 | { | |
04aea0ca | 121 | unsigned int b = test_bit(SDF_WITHDRAWN, &sdp->sd_flags); |
3204a6c0 | 122 | return snprintf(buf, PAGE_SIZE, "%u\n", b); |
b3b94faa DT |
123 | } |
124 | ||
125 | static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
126 | { | |
e50ead48 FF |
127 | int error, val; |
128 | ||
b3b94faa | 129 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 130 | return -EPERM; |
b3b94faa | 131 | |
e50ead48 FF |
132 | error = kstrtoint(buf, 0, &val); |
133 | if (error) | |
134 | return error; | |
135 | ||
136 | if (val != 1) | |
b3b94faa DT |
137 | return -EINVAL; |
138 | ||
cb94eb06 JP |
139 | gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n"); |
140 | ||
b3b94faa DT |
141 | return len; |
142 | } | |
143 | ||
144 | static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf, | |
145 | size_t len) | |
146 | { | |
e50ead48 FF |
147 | int error, val; |
148 | ||
b3b94faa | 149 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 150 | return -EPERM; |
b3b94faa | 151 | |
e50ead48 FF |
152 | error = kstrtoint(buf, 0, &val); |
153 | if (error) | |
154 | return error; | |
155 | ||
156 | if (val != 1) | |
b3b94faa DT |
157 | return -EINVAL; |
158 | ||
8c42d637 | 159 | gfs2_statfs_sync(sdp->sd_vfs, 0); |
b3b94faa DT |
160 | return len; |
161 | } | |
162 | ||
b3b94faa DT |
163 | static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf, |
164 | size_t len) | |
165 | { | |
e50ead48 FF |
166 | int error, val; |
167 | ||
b3b94faa | 168 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 169 | return -EPERM; |
b3b94faa | 170 | |
e50ead48 FF |
171 | error = kstrtoint(buf, 0, &val); |
172 | if (error) | |
173 | return error; | |
174 | ||
175 | if (val != 1) | |
b3b94faa DT |
176 | return -EINVAL; |
177 | ||
ceed1723 | 178 | gfs2_quota_sync(sdp->sd_vfs, 0); |
b3b94faa DT |
179 | return len; |
180 | } | |
181 | ||
182 | static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf, | |
183 | size_t len) | |
184 | { | |
ed87dabc | 185 | struct kqid qid; |
ea762338 | 186 | int error; |
cd915493 | 187 | u32 id; |
b3b94faa DT |
188 | |
189 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 190 | return -EPERM; |
b3b94faa | 191 | |
e50ead48 FF |
192 | error = kstrtou32(buf, 0, &id); |
193 | if (error) | |
194 | return error; | |
b3b94faa | 195 | |
ed87dabc EB |
196 | qid = make_kqid(current_user_ns(), USRQUOTA, id); |
197 | if (!qid_valid(qid)) | |
198 | return -EINVAL; | |
199 | ||
200 | error = gfs2_quota_refresh(sdp, qid); | |
ea762338 | 201 | return error ? error : len; |
b3b94faa DT |
202 | } |
203 | ||
204 | static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, | |
205 | size_t len) | |
206 | { | |
ed87dabc | 207 | struct kqid qid; |
ea762338 | 208 | int error; |
cd915493 | 209 | u32 id; |
b3b94faa DT |
210 | |
211 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 212 | return -EPERM; |
b3b94faa | 213 | |
e50ead48 FF |
214 | error = kstrtou32(buf, 0, &id); |
215 | if (error) | |
216 | return error; | |
b3b94faa | 217 | |
ed87dabc EB |
218 | qid = make_kqid(current_user_ns(), GRPQUOTA, id); |
219 | if (!qid_valid(qid)) | |
220 | return -EINVAL; | |
221 | ||
222 | error = gfs2_quota_refresh(sdp, qid); | |
ea762338 | 223 | return error ? error : len; |
b3b94faa DT |
224 | } |
225 | ||
64d576ba SW |
226 | static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
227 | { | |
228 | struct gfs2_glock *gl; | |
229 | const struct gfs2_glock_operations *glops; | |
230 | unsigned int glmode; | |
231 | unsigned int gltype; | |
232 | unsigned long long glnum; | |
233 | char mode[16]; | |
234 | int rv; | |
235 | ||
236 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 237 | return -EPERM; |
64d576ba SW |
238 | |
239 | rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum, | |
240 | mode); | |
241 | if (rv != 3) | |
242 | return -EINVAL; | |
243 | ||
244 | if (strcmp(mode, "EX") == 0) | |
245 | glmode = LM_ST_UNLOCKED; | |
246 | else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0)) | |
247 | glmode = LM_ST_DEFERRED; | |
248 | else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0)) | |
249 | glmode = LM_ST_SHARED; | |
250 | else | |
251 | return -EINVAL; | |
252 | ||
253 | if (gltype > LM_TYPE_JOURNAL) | |
254 | return -EINVAL; | |
24972557 BM |
255 | if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK) |
256 | glops = &gfs2_freeze_glops; | |
13466985 SW |
257 | else |
258 | glops = gfs2_glops_list[gltype]; | |
64d576ba SW |
259 | if (glops == NULL) |
260 | return -EINVAL; | |
6a99be5d | 261 | if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags)) |
913a71d2 | 262 | fs_info(sdp, "demote interface used\n"); |
64d576ba SW |
263 | rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl); |
264 | if (rv) | |
265 | return rv; | |
266 | gfs2_glock_cb(gl, glmode); | |
267 | gfs2_glock_put(gl); | |
268 | return len; | |
269 | } | |
270 | ||
b3b94faa DT |
271 | |
272 | #define GFS2_ATTR(name, mode, show, store) \ | |
273 | static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) | |
274 | ||
275 | GFS2_ATTR(id, 0444, id_show, NULL); | |
276 | GFS2_ATTR(fsname, 0444, fsname_show, NULL); | |
02e3cc70 | 277 | GFS2_ATTR(uuid, 0444, uuid_show, NULL); |
b3b94faa | 278 | GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); |
b3b94faa DT |
279 | GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store); |
280 | GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store); | |
281 | GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store); | |
282 | GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store); | |
283 | GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store); | |
64d576ba | 284 | GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store); |
b3b94faa DT |
285 | |
286 | static struct attribute *gfs2_attrs[] = { | |
287 | &gfs2_attr_id.attr, | |
288 | &gfs2_attr_fsname.attr, | |
02e3cc70 | 289 | &gfs2_attr_uuid.attr, |
b3b94faa | 290 | &gfs2_attr_freeze.attr, |
b3b94faa DT |
291 | &gfs2_attr_withdraw.attr, |
292 | &gfs2_attr_statfs_sync.attr, | |
293 | &gfs2_attr_quota_sync.attr, | |
294 | &gfs2_attr_quota_refresh_user.attr, | |
295 | &gfs2_attr_quota_refresh_group.attr, | |
64d576ba | 296 | &gfs2_attr_demote_rq.attr, |
b3b94faa DT |
297 | NULL, |
298 | }; | |
ef254d13 | 299 | ATTRIBUTE_GROUPS(gfs2); |
b3b94faa | 300 | |
0d515210 BP |
301 | static void gfs2_sbd_release(struct kobject *kobj) |
302 | { | |
303 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
304 | ||
2a27b755 | 305 | free_sbd(sdp); |
0d515210 BP |
306 | } |
307 | ||
b3b94faa | 308 | static struct kobj_type gfs2_ktype = { |
0d515210 | 309 | .release = gfs2_sbd_release, |
ef254d13 | 310 | .default_groups = gfs2_groups, |
b3b94faa DT |
311 | .sysfs_ops = &gfs2_attr_ops, |
312 | }; | |
313 | ||
f057f6cd SW |
314 | |
315 | /* | |
316 | * lock_module. Originally from lock_dlm | |
317 | */ | |
318 | ||
319 | static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf) | |
320 | { | |
321 | const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops; | |
322 | return sprintf(buf, "%s\n", ops->lm_proto_name); | |
323 | } | |
324 | ||
325 | static ssize_t block_show(struct gfs2_sbd *sdp, char *buf) | |
326 | { | |
327 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
328 | ssize_t ret; | |
329 | int val = 0; | |
330 | ||
e0c2a9aa | 331 | if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags)) |
f057f6cd SW |
332 | val = 1; |
333 | ret = sprintf(buf, "%d\n", val); | |
334 | return ret; | |
335 | } | |
336 | ||
337 | static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
338 | { | |
339 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
e50ead48 | 340 | int ret, val; |
f057f6cd | 341 | |
e50ead48 FF |
342 | ret = kstrtoint(buf, 0, &val); |
343 | if (ret) | |
344 | return ret; | |
f057f6cd SW |
345 | |
346 | if (val == 1) | |
e0c2a9aa | 347 | set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
f057f6cd | 348 | else if (val == 0) { |
e0c2a9aa | 349 | clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
4e857c58 | 350 | smp_mb__after_atomic(); |
f057f6cd SW |
351 | gfs2_glock_thaw(sdp); |
352 | } else { | |
e50ead48 | 353 | return -EINVAL; |
f057f6cd | 354 | } |
e50ead48 | 355 | return len; |
f057f6cd SW |
356 | } |
357 | ||
fd95e81c SW |
358 | static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf) |
359 | { | |
360 | int val = completion_done(&sdp->sd_wdack) ? 1 : 0; | |
361 | ||
362 | return sprintf(buf, "%d\n", val); | |
363 | } | |
364 | ||
365 | static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
366 | { | |
e50ead48 | 367 | int ret, val; |
fd95e81c | 368 | |
e50ead48 FF |
369 | ret = kstrtoint(buf, 0, &val); |
370 | if (ret) | |
371 | return ret; | |
fd95e81c SW |
372 | |
373 | if ((val == 1) && | |
374 | !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm")) | |
375 | complete(&sdp->sd_wdack); | |
376 | else | |
e50ead48 FF |
377 | return -EINVAL; |
378 | return len; | |
fd95e81c SW |
379 | } |
380 | ||
f057f6cd SW |
381 | static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) |
382 | { | |
383 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
384 | return sprintf(buf, "%d\n", ls->ls_first); | |
385 | } | |
386 | ||
ba6e9364 SW |
387 | static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
388 | { | |
389 | unsigned first; | |
390 | int rv; | |
391 | ||
392 | rv = sscanf(buf, "%u", &first); | |
393 | if (rv != 1 || first > 1) | |
394 | return -EINVAL; | |
3942ae53 SW |
395 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
396 | if (rv) | |
397 | return rv; | |
ba6e9364 SW |
398 | spin_lock(&sdp->sd_jindex_spin); |
399 | rv = -EBUSY; | |
400 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) | |
401 | goto out; | |
402 | rv = -EINVAL; | |
403 | if (sdp->sd_args.ar_spectator) | |
404 | goto out; | |
405 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) | |
406 | goto out; | |
e0c2a9aa DT |
407 | sdp->sd_lockstruct.ls_first = first; |
408 | rv = 0; | |
ba6e9364 SW |
409 | out: |
410 | spin_unlock(&sdp->sd_jindex_spin); | |
411 | return rv ? rv : len; | |
412 | } | |
413 | ||
f057f6cd SW |
414 | static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) |
415 | { | |
416 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
e0c2a9aa | 417 | return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags)); |
f057f6cd SW |
418 | } |
419 | ||
e0c2a9aa | 420 | int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid) |
f057f6cd SW |
421 | { |
422 | struct gfs2_jdesc *jd; | |
fe64d517 SW |
423 | int rv; |
424 | ||
0e48e055 BP |
425 | /* Wait for our primary journal to be initialized */ |
426 | wait_for_completion(&sdp->sd_journal_ready); | |
427 | ||
f057f6cd | 428 | spin_lock(&sdp->sd_jindex_spin); |
fe64d517 | 429 | rv = -EBUSY; |
4a772772 BP |
430 | /** |
431 | * If we're a spectator, we use journal0, but it's not really ours. | |
432 | * So we need to wait for its recovery too. If we skip it we'd never | |
433 | * queue work to the recovery workqueue, and so its completion would | |
434 | * never clear the DFL_BLOCK_LOCKS flag, so all our locks would | |
435 | * permanently stop working. | |
436 | */ | |
437 | if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator) | |
fe64d517 SW |
438 | goto out; |
439 | rv = -ENOENT; | |
f057f6cd | 440 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
4a772772 | 441 | if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator) |
f057f6cd | 442 | continue; |
6ecd7c2d | 443 | rv = gfs2_recover_journal(jd, false); |
f057f6cd SW |
444 | break; |
445 | } | |
fe64d517 | 446 | out: |
f057f6cd | 447 | spin_unlock(&sdp->sd_jindex_spin); |
e0c2a9aa DT |
448 | return rv; |
449 | } | |
450 | ||
451 | static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
452 | { | |
453 | unsigned jid; | |
454 | int rv; | |
455 | ||
456 | rv = sscanf(buf, "%u", &jid); | |
457 | if (rv != 1) | |
458 | return -EINVAL; | |
459 | ||
1a058f52 DT |
460 | if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { |
461 | rv = -ESHUTDOWN; | |
462 | goto out; | |
463 | } | |
e0c2a9aa | 464 | |
1a058f52 DT |
465 | rv = gfs2_recover_set(sdp, jid); |
466 | out: | |
fe64d517 | 467 | return rv ? rv : len; |
f057f6cd SW |
468 | } |
469 | ||
470 | static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) | |
471 | { | |
472 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
473 | return sprintf(buf, "%d\n", ls->ls_recover_jid_done); | |
474 | } | |
475 | ||
476 | static ssize_t recover_status_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_status); | |
480 | } | |
481 | ||
e1b28aab SW |
482 | static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) |
483 | { | |
feb47ca9 | 484 | return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); |
e1b28aab SW |
485 | } |
486 | ||
ba6e9364 SW |
487 | static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
488 | { | |
feb47ca9 | 489 | int jid; |
ba6e9364 SW |
490 | int rv; |
491 | ||
feb47ca9 | 492 | rv = sscanf(buf, "%d", &jid); |
ba6e9364 SW |
493 | if (rv != 1) |
494 | return -EINVAL; | |
3942ae53 SW |
495 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
496 | if (rv) | |
497 | return rv; | |
ba6e9364 SW |
498 | spin_lock(&sdp->sd_jindex_spin); |
499 | rv = -EINVAL; | |
ba6e9364 SW |
500 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
501 | goto out; | |
502 | rv = -EBUSY; | |
feb47ca9 | 503 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) |
ba6e9364 | 504 | goto out; |
feb47ca9 SW |
505 | rv = 0; |
506 | if (sdp->sd_args.ar_spectator && jid > 0) | |
507 | rv = jid = -EINVAL; | |
ba6e9364 | 508 | sdp->sd_lockstruct.ls_jid = jid; |
feb47ca9 | 509 | clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
4e857c58 | 510 | smp_mb__after_atomic(); |
ba6e9364 | 511 | wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); |
ba6e9364 SW |
512 | out: |
513 | spin_unlock(&sdp->sd_jindex_spin); | |
514 | return rv ? rv : len; | |
515 | } | |
516 | ||
f057f6cd | 517 | #define GDLM_ATTR(_name,_mode,_show,_store) \ |
48c2b613 | 518 | static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) |
f057f6cd | 519 | |
d7e623da SW |
520 | GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); |
521 | GDLM_ATTR(block, 0644, block_show, block_store); | |
fd95e81c | 522 | GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store); |
ba6e9364 SW |
523 | GDLM_ATTR(jid, 0644, jid_show, jid_store); |
524 | GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); | |
d7e623da SW |
525 | GDLM_ATTR(first_done, 0444, first_done_show, NULL); |
526 | GDLM_ATTR(recover, 0600, NULL, recover_store); | |
527 | GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); | |
528 | GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); | |
f057f6cd SW |
529 | |
530 | static struct attribute *lock_module_attrs[] = { | |
531 | &gdlm_attr_proto_name.attr, | |
532 | &gdlm_attr_block.attr, | |
533 | &gdlm_attr_withdraw.attr, | |
e1b28aab | 534 | &gdlm_attr_jid.attr, |
f057f6cd SW |
535 | &gdlm_attr_first.attr, |
536 | &gdlm_attr_first_done.attr, | |
537 | &gdlm_attr_recover.attr, | |
538 | &gdlm_attr_recover_done.attr, | |
539 | &gdlm_attr_recover_status.attr, | |
ea67eedb | 540 | NULL, |
b3b94faa DT |
541 | }; |
542 | ||
b3b94faa DT |
543 | /* |
544 | * get and set struct gfs2_tune fields | |
545 | */ | |
546 | ||
547 | static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) | |
548 | { | |
3204a6c0 DT |
549 | return snprintf(buf, PAGE_SIZE, "%u %u\n", |
550 | sdp->sd_tune.gt_quota_scale_num, | |
551 | sdp->sd_tune.gt_quota_scale_den); | |
b3b94faa DT |
552 | } |
553 | ||
554 | static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, | |
555 | size_t len) | |
556 | { | |
557 | struct gfs2_tune *gt = &sdp->sd_tune; | |
558 | unsigned int x, y; | |
559 | ||
560 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 561 | return -EPERM; |
b3b94faa DT |
562 | |
563 | if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) | |
564 | return -EINVAL; | |
565 | ||
566 | spin_lock(>->gt_spin); | |
567 | gt->gt_quota_scale_num = x; | |
568 | gt->gt_quota_scale_den = y; | |
569 | spin_unlock(>->gt_spin); | |
570 | return len; | |
571 | } | |
572 | ||
573 | static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, | |
574 | int check_zero, const char *buf, size_t len) | |
575 | { | |
576 | struct gfs2_tune *gt = &sdp->sd_tune; | |
577 | unsigned int x; | |
e50ead48 | 578 | int error; |
b3b94faa DT |
579 | |
580 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 581 | return -EPERM; |
b3b94faa | 582 | |
e50ead48 FF |
583 | error = kstrtouint(buf, 0, &x); |
584 | if (error) | |
585 | return error; | |
b3b94faa DT |
586 | |
587 | if (check_zero && !x) | |
588 | return -EINVAL; | |
589 | ||
590 | spin_lock(>->gt_spin); | |
591 | *field = x; | |
592 | spin_unlock(>->gt_spin); | |
593 | return len; | |
594 | } | |
595 | ||
b3b94faa | 596 | #define TUNE_ATTR_3(name, show, store) \ |
48c2b613 | 597 | static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) |
b3b94faa DT |
598 | |
599 | #define TUNE_ATTR_2(name, store) \ | |
600 | static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ | |
601 | { \ | |
3204a6c0 | 602 | return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ |
b3b94faa DT |
603 | } \ |
604 | TUNE_ATTR_3(name, name##_show, store) | |
605 | ||
606 | #define TUNE_ATTR(name, check_zero) \ | |
607 | static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ | |
608 | { \ | |
609 | return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ | |
610 | } \ | |
611 | TUNE_ATTR_2(name, name##_store) | |
612 | ||
b3b94faa DT |
613 | TUNE_ATTR(quota_warn_period, 0); |
614 | TUNE_ATTR(quota_quantum, 0); | |
b3b94faa DT |
615 | TUNE_ATTR(max_readahead, 0); |
616 | TUNE_ATTR(complain_secs, 0); | |
b3b94faa DT |
617 | TUNE_ATTR(statfs_slow, 0); |
618 | TUNE_ATTR(new_files_jdata, 0); | |
b3b94faa | 619 | TUNE_ATTR(statfs_quantum, 1); |
b3b94faa DT |
620 | TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); |
621 | ||
622 | static struct attribute *tune_attrs[] = { | |
b3b94faa DT |
623 | &tune_attr_quota_warn_period.attr, |
624 | &tune_attr_quota_quantum.attr, | |
b3b94faa DT |
625 | &tune_attr_max_readahead.attr, |
626 | &tune_attr_complain_secs.attr, | |
b3b94faa | 627 | &tune_attr_statfs_slow.attr, |
b3b94faa | 628 | &tune_attr_statfs_quantum.attr, |
b3b94faa DT |
629 | &tune_attr_quota_scale.attr, |
630 | &tune_attr_new_files_jdata.attr, | |
ea67eedb | 631 | NULL, |
b3b94faa DT |
632 | }; |
633 | ||
29695254 | 634 | static const struct attribute_group tune_group = { |
b3b94faa | 635 | .name = "tune", |
ea67eedb | 636 | .attrs = tune_attrs, |
b3b94faa DT |
637 | }; |
638 | ||
29695254 | 639 | static const struct attribute_group lock_module_group = { |
f057f6cd SW |
640 | .name = "lock_module", |
641 | .attrs = lock_module_attrs, | |
642 | }; | |
643 | ||
b3b94faa DT |
644 | int gfs2_sys_fs_add(struct gfs2_sbd *sdp) |
645 | { | |
440d6da2 | 646 | struct super_block *sb = sdp->sd_vfs; |
b3b94faa | 647 | int error; |
440d6da2 SW |
648 | char ro[20]; |
649 | char spectator[20]; | |
650 | char *envp[] = { ro, spectator, NULL }; | |
651 | ||
bc98a42c | 652 | sprintf(ro, "RDONLY=%d", sb_rdonly(sb)); |
440d6da2 | 653 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); |
b3b94faa | 654 | |
9bec101a | 655 | sdp->sd_kobj.kset = gfs2_kset; |
901195ed GKH |
656 | error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, |
657 | "%s", sdp->sd_table_name); | |
b3b94faa | 658 | if (error) |
0d515210 | 659 | goto fail_reg; |
b3b94faa | 660 | |
b3b94faa DT |
661 | error = sysfs_create_group(&sdp->sd_kobj, &tune_group); |
662 | if (error) | |
f6eb5349 | 663 | goto fail_reg; |
b3b94faa | 664 | |
f057f6cd SW |
665 | error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); |
666 | if (error) | |
667 | goto fail_tune; | |
668 | ||
31e54b01 SW |
669 | error = sysfs_create_link(&sdp->sd_kobj, |
670 | &disk_to_dev(sb->s_bdev->bd_disk)->kobj, | |
671 | "device"); | |
672 | if (error) | |
673 | goto fail_lock_module; | |
674 | ||
440d6da2 | 675 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); |
b3b94faa DT |
676 | return 0; |
677 | ||
31e54b01 SW |
678 | fail_lock_module: |
679 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); | |
f057f6cd SW |
680 | fail_tune: |
681 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); | |
a91ea69f | 682 | fail_reg: |
af38816e | 683 | fs_err(sdp, "error %d adding sysfs files\n", error); |
fbcde197 | 684 | kobject_put(&sdp->sd_kobj); |
0d515210 | 685 | sb->s_fs_info = NULL; |
b3b94faa DT |
686 | return error; |
687 | } | |
688 | ||
689 | void gfs2_sys_fs_del(struct gfs2_sbd *sdp) | |
690 | { | |
31e54b01 | 691 | sysfs_remove_link(&sdp->sd_kobj, "device"); |
b3b94faa | 692 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); |
f057f6cd | 693 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); |
197b12d6 | 694 | kobject_put(&sdp->sd_kobj); |
b3b94faa DT |
695 | } |
696 | ||
fdd1062e SW |
697 | static int gfs2_uevent(struct kset *kset, struct kobject *kobj, |
698 | struct kobj_uevent_env *env) | |
699 | { | |
700 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
32e471ef | 701 | struct super_block *s = sdp->sd_vfs; |
02e3cc70 | 702 | |
fdd1062e SW |
703 | add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); |
704 | add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); | |
ba6e9364 | 705 | if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
feb47ca9 | 706 | add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); |
85787090 CH |
707 | if (!uuid_is_null(&s->s_uuid)) |
708 | add_uevent_var(env, "UUID=%pUB", &s->s_uuid); | |
fdd1062e SW |
709 | return 0; |
710 | } | |
711 | ||
9cd43611 | 712 | static const struct kset_uevent_ops gfs2_uevent_ops = { |
fdd1062e SW |
713 | .uevent = gfs2_uevent, |
714 | }; | |
715 | ||
b3b94faa DT |
716 | int gfs2_sys_init(void) |
717 | { | |
fdd1062e | 718 | gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); |
9bec101a GKH |
719 | if (!gfs2_kset) |
720 | return -ENOMEM; | |
721 | return 0; | |
b3b94faa DT |
722 | } |
723 | ||
724 | void gfs2_sys_uninit(void) | |
725 | { | |
9bec101a | 726 | kset_unregister(gfs2_kset); |
b3b94faa DT |
727 | } |
728 |