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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 | { | |
eb43e660 | 121 | unsigned int b = gfs2_withdrawn(sdp); |
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 | ||
badb55ec AG |
139 | gfs2_lm(sdp, "withdrawing from cluster at user's request\n"); |
140 | gfs2_withdraw(sdp); | |
cb94eb06 | 141 | |
b3b94faa DT |
142 | return len; |
143 | } | |
144 | ||
145 | static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf, | |
146 | size_t len) | |
147 | { | |
e50ead48 FF |
148 | int error, val; |
149 | ||
b3b94faa | 150 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 151 | return -EPERM; |
b3b94faa | 152 | |
e50ead48 FF |
153 | error = kstrtoint(buf, 0, &val); |
154 | if (error) | |
155 | return error; | |
156 | ||
157 | if (val != 1) | |
b3b94faa DT |
158 | return -EINVAL; |
159 | ||
8c42d637 | 160 | gfs2_statfs_sync(sdp->sd_vfs, 0); |
b3b94faa DT |
161 | return len; |
162 | } | |
163 | ||
b3b94faa DT |
164 | static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf, |
165 | size_t len) | |
166 | { | |
e50ead48 FF |
167 | int error, val; |
168 | ||
b3b94faa | 169 | if (!capable(CAP_SYS_ADMIN)) |
41735818 | 170 | return -EPERM; |
b3b94faa | 171 | |
e50ead48 FF |
172 | error = kstrtoint(buf, 0, &val); |
173 | if (error) | |
174 | return error; | |
175 | ||
176 | if (val != 1) | |
b3b94faa DT |
177 | return -EINVAL; |
178 | ||
ceed1723 | 179 | gfs2_quota_sync(sdp->sd_vfs, 0); |
b3b94faa DT |
180 | return len; |
181 | } | |
182 | ||
183 | static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf, | |
184 | size_t len) | |
185 | { | |
ed87dabc | 186 | struct kqid qid; |
ea762338 | 187 | int error; |
cd915493 | 188 | u32 id; |
b3b94faa DT |
189 | |
190 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 191 | return -EPERM; |
b3b94faa | 192 | |
e50ead48 FF |
193 | error = kstrtou32(buf, 0, &id); |
194 | if (error) | |
195 | return error; | |
b3b94faa | 196 | |
ed87dabc EB |
197 | qid = make_kqid(current_user_ns(), USRQUOTA, id); |
198 | if (!qid_valid(qid)) | |
199 | return -EINVAL; | |
200 | ||
201 | error = gfs2_quota_refresh(sdp, qid); | |
ea762338 | 202 | return error ? error : len; |
b3b94faa DT |
203 | } |
204 | ||
205 | static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, | |
206 | size_t len) | |
207 | { | |
ed87dabc | 208 | struct kqid qid; |
ea762338 | 209 | int error; |
cd915493 | 210 | u32 id; |
b3b94faa DT |
211 | |
212 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 213 | return -EPERM; |
b3b94faa | 214 | |
e50ead48 FF |
215 | error = kstrtou32(buf, 0, &id); |
216 | if (error) | |
217 | return error; | |
b3b94faa | 218 | |
ed87dabc EB |
219 | qid = make_kqid(current_user_ns(), GRPQUOTA, id); |
220 | if (!qid_valid(qid)) | |
221 | return -EINVAL; | |
222 | ||
223 | error = gfs2_quota_refresh(sdp, qid); | |
ea762338 | 224 | return error ? error : len; |
b3b94faa DT |
225 | } |
226 | ||
64d576ba SW |
227 | static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
228 | { | |
229 | struct gfs2_glock *gl; | |
230 | const struct gfs2_glock_operations *glops; | |
231 | unsigned int glmode; | |
232 | unsigned int gltype; | |
233 | unsigned long long glnum; | |
234 | char mode[16]; | |
235 | int rv; | |
236 | ||
237 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 238 | return -EPERM; |
64d576ba SW |
239 | |
240 | rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum, | |
241 | mode); | |
242 | if (rv != 3) | |
243 | return -EINVAL; | |
244 | ||
245 | if (strcmp(mode, "EX") == 0) | |
246 | glmode = LM_ST_UNLOCKED; | |
247 | else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0)) | |
248 | glmode = LM_ST_DEFERRED; | |
249 | else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0)) | |
250 | glmode = LM_ST_SHARED; | |
251 | else | |
252 | return -EINVAL; | |
253 | ||
254 | if (gltype > LM_TYPE_JOURNAL) | |
255 | return -EINVAL; | |
24972557 BM |
256 | if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK) |
257 | glops = &gfs2_freeze_glops; | |
13466985 SW |
258 | else |
259 | glops = gfs2_glops_list[gltype]; | |
64d576ba SW |
260 | if (glops == NULL) |
261 | return -EINVAL; | |
6a99be5d | 262 | if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags)) |
913a71d2 | 263 | fs_info(sdp, "demote interface used\n"); |
64d576ba SW |
264 | rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl); |
265 | if (rv) | |
266 | return rv; | |
267 | gfs2_glock_cb(gl, glmode); | |
268 | gfs2_glock_put(gl); | |
269 | return len; | |
270 | } | |
271 | ||
b3b94faa DT |
272 | |
273 | #define GFS2_ATTR(name, mode, show, store) \ | |
274 | static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) | |
275 | ||
276 | GFS2_ATTR(id, 0444, id_show, NULL); | |
277 | GFS2_ATTR(fsname, 0444, fsname_show, NULL); | |
02e3cc70 | 278 | GFS2_ATTR(uuid, 0444, uuid_show, NULL); |
b3b94faa | 279 | GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); |
b3b94faa DT |
280 | GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store); |
281 | GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store); | |
282 | GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store); | |
283 | GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store); | |
284 | GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store); | |
64d576ba | 285 | GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store); |
b3b94faa DT |
286 | |
287 | static struct attribute *gfs2_attrs[] = { | |
288 | &gfs2_attr_id.attr, | |
289 | &gfs2_attr_fsname.attr, | |
02e3cc70 | 290 | &gfs2_attr_uuid.attr, |
b3b94faa | 291 | &gfs2_attr_freeze.attr, |
b3b94faa DT |
292 | &gfs2_attr_withdraw.attr, |
293 | &gfs2_attr_statfs_sync.attr, | |
294 | &gfs2_attr_quota_sync.attr, | |
295 | &gfs2_attr_quota_refresh_user.attr, | |
296 | &gfs2_attr_quota_refresh_group.attr, | |
64d576ba | 297 | &gfs2_attr_demote_rq.attr, |
b3b94faa DT |
298 | NULL, |
299 | }; | |
ef254d13 | 300 | ATTRIBUTE_GROUPS(gfs2); |
b3b94faa | 301 | |
0d515210 BP |
302 | static void gfs2_sbd_release(struct kobject *kobj) |
303 | { | |
304 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
305 | ||
c2a04b02 | 306 | complete(&sdp->sd_kobj_unregister); |
0d515210 BP |
307 | } |
308 | ||
b3b94faa | 309 | static struct kobj_type gfs2_ktype = { |
0d515210 | 310 | .release = gfs2_sbd_release, |
ef254d13 | 311 | .default_groups = gfs2_groups, |
b3b94faa DT |
312 | .sysfs_ops = &gfs2_attr_ops, |
313 | }; | |
314 | ||
f057f6cd SW |
315 | |
316 | /* | |
317 | * lock_module. Originally from lock_dlm | |
318 | */ | |
319 | ||
320 | static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf) | |
321 | { | |
322 | const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops; | |
323 | return sprintf(buf, "%s\n", ops->lm_proto_name); | |
324 | } | |
325 | ||
326 | static ssize_t block_show(struct gfs2_sbd *sdp, char *buf) | |
327 | { | |
328 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
329 | ssize_t ret; | |
330 | int val = 0; | |
331 | ||
e0c2a9aa | 332 | if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags)) |
f057f6cd SW |
333 | val = 1; |
334 | ret = sprintf(buf, "%d\n", val); | |
335 | return ret; | |
336 | } | |
337 | ||
338 | static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
339 | { | |
340 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
e50ead48 | 341 | int ret, val; |
f057f6cd | 342 | |
e50ead48 FF |
343 | ret = kstrtoint(buf, 0, &val); |
344 | if (ret) | |
345 | return ret; | |
f057f6cd SW |
346 | |
347 | if (val == 1) | |
e0c2a9aa | 348 | set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
f057f6cd | 349 | else if (val == 0) { |
e0c2a9aa | 350 | clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); |
4e857c58 | 351 | smp_mb__after_atomic(); |
f057f6cd SW |
352 | gfs2_glock_thaw(sdp); |
353 | } else { | |
e50ead48 | 354 | return -EINVAL; |
f057f6cd | 355 | } |
e50ead48 | 356 | return len; |
f057f6cd SW |
357 | } |
358 | ||
fd95e81c SW |
359 | static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf) |
360 | { | |
361 | int val = completion_done(&sdp->sd_wdack) ? 1 : 0; | |
362 | ||
363 | return sprintf(buf, "%d\n", val); | |
364 | } | |
365 | ||
366 | static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
367 | { | |
e50ead48 | 368 | int ret, val; |
fd95e81c | 369 | |
e50ead48 FF |
370 | ret = kstrtoint(buf, 0, &val); |
371 | if (ret) | |
372 | return ret; | |
fd95e81c SW |
373 | |
374 | if ((val == 1) && | |
375 | !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm")) | |
376 | complete(&sdp->sd_wdack); | |
377 | else | |
e50ead48 FF |
378 | return -EINVAL; |
379 | return len; | |
fd95e81c SW |
380 | } |
381 | ||
f057f6cd SW |
382 | static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) |
383 | { | |
384 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
385 | return sprintf(buf, "%d\n", ls->ls_first); | |
386 | } | |
387 | ||
ba6e9364 SW |
388 | static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
389 | { | |
390 | unsigned first; | |
391 | int rv; | |
392 | ||
393 | rv = sscanf(buf, "%u", &first); | |
394 | if (rv != 1 || first > 1) | |
395 | return -EINVAL; | |
3942ae53 SW |
396 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
397 | if (rv) | |
398 | return rv; | |
ba6e9364 SW |
399 | spin_lock(&sdp->sd_jindex_spin); |
400 | rv = -EBUSY; | |
401 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) | |
402 | goto out; | |
403 | rv = -EINVAL; | |
404 | if (sdp->sd_args.ar_spectator) | |
405 | goto out; | |
406 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) | |
407 | goto out; | |
e0c2a9aa DT |
408 | sdp->sd_lockstruct.ls_first = first; |
409 | rv = 0; | |
ba6e9364 SW |
410 | out: |
411 | spin_unlock(&sdp->sd_jindex_spin); | |
412 | return rv ? rv : len; | |
413 | } | |
414 | ||
f057f6cd SW |
415 | static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) |
416 | { | |
417 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
e0c2a9aa | 418 | return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags)); |
f057f6cd SW |
419 | } |
420 | ||
e0c2a9aa | 421 | int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid) |
f057f6cd SW |
422 | { |
423 | struct gfs2_jdesc *jd; | |
fe64d517 SW |
424 | int rv; |
425 | ||
0e48e055 BP |
426 | /* Wait for our primary journal to be initialized */ |
427 | wait_for_completion(&sdp->sd_journal_ready); | |
428 | ||
f057f6cd | 429 | spin_lock(&sdp->sd_jindex_spin); |
fe64d517 | 430 | rv = -EBUSY; |
4a772772 BP |
431 | /** |
432 | * If we're a spectator, we use journal0, but it's not really ours. | |
433 | * So we need to wait for its recovery too. If we skip it we'd never | |
434 | * queue work to the recovery workqueue, and so its completion would | |
435 | * never clear the DFL_BLOCK_LOCKS flag, so all our locks would | |
436 | * permanently stop working. | |
437 | */ | |
601ef0d5 BP |
438 | if (!sdp->sd_jdesc) |
439 | goto out; | |
4a772772 | 440 | if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator) |
fe64d517 SW |
441 | goto out; |
442 | rv = -ENOENT; | |
f057f6cd | 443 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
4a772772 | 444 | if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator) |
f057f6cd | 445 | continue; |
6ecd7c2d | 446 | rv = gfs2_recover_journal(jd, false); |
f057f6cd SW |
447 | break; |
448 | } | |
fe64d517 | 449 | out: |
f057f6cd | 450 | spin_unlock(&sdp->sd_jindex_spin); |
e0c2a9aa DT |
451 | return rv; |
452 | } | |
453 | ||
454 | static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
455 | { | |
456 | unsigned jid; | |
457 | int rv; | |
458 | ||
459 | rv = sscanf(buf, "%u", &jid); | |
460 | if (rv != 1) | |
461 | return -EINVAL; | |
462 | ||
1a058f52 DT |
463 | if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { |
464 | rv = -ESHUTDOWN; | |
465 | goto out; | |
466 | } | |
e0c2a9aa | 467 | |
1a058f52 DT |
468 | rv = gfs2_recover_set(sdp, jid); |
469 | out: | |
fe64d517 | 470 | return rv ? rv : len; |
f057f6cd SW |
471 | } |
472 | ||
473 | static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) | |
474 | { | |
475 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
476 | return sprintf(buf, "%d\n", ls->ls_recover_jid_done); | |
477 | } | |
478 | ||
479 | static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) | |
480 | { | |
481 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
482 | return sprintf(buf, "%d\n", ls->ls_recover_jid_status); | |
483 | } | |
484 | ||
e1b28aab SW |
485 | static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) |
486 | { | |
feb47ca9 | 487 | return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); |
e1b28aab SW |
488 | } |
489 | ||
ba6e9364 SW |
490 | static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
491 | { | |
feb47ca9 | 492 | int jid; |
ba6e9364 SW |
493 | int rv; |
494 | ||
feb47ca9 | 495 | rv = sscanf(buf, "%d", &jid); |
ba6e9364 SW |
496 | if (rv != 1) |
497 | return -EINVAL; | |
3942ae53 SW |
498 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
499 | if (rv) | |
500 | return rv; | |
ba6e9364 SW |
501 | spin_lock(&sdp->sd_jindex_spin); |
502 | rv = -EINVAL; | |
ba6e9364 SW |
503 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
504 | goto out; | |
505 | rv = -EBUSY; | |
feb47ca9 | 506 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) |
ba6e9364 | 507 | goto out; |
feb47ca9 SW |
508 | rv = 0; |
509 | if (sdp->sd_args.ar_spectator && jid > 0) | |
510 | rv = jid = -EINVAL; | |
ba6e9364 | 511 | sdp->sd_lockstruct.ls_jid = jid; |
feb47ca9 | 512 | clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
4e857c58 | 513 | smp_mb__after_atomic(); |
ba6e9364 | 514 | wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); |
ba6e9364 SW |
515 | out: |
516 | spin_unlock(&sdp->sd_jindex_spin); | |
517 | return rv ? rv : len; | |
518 | } | |
519 | ||
f057f6cd | 520 | #define GDLM_ATTR(_name,_mode,_show,_store) \ |
48c2b613 | 521 | static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) |
f057f6cd | 522 | |
d7e623da SW |
523 | GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); |
524 | GDLM_ATTR(block, 0644, block_show, block_store); | |
fd95e81c | 525 | GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store); |
ba6e9364 SW |
526 | GDLM_ATTR(jid, 0644, jid_show, jid_store); |
527 | GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); | |
d7e623da SW |
528 | GDLM_ATTR(first_done, 0444, first_done_show, NULL); |
529 | GDLM_ATTR(recover, 0600, NULL, recover_store); | |
530 | GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); | |
531 | GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); | |
f057f6cd SW |
532 | |
533 | static struct attribute *lock_module_attrs[] = { | |
534 | &gdlm_attr_proto_name.attr, | |
535 | &gdlm_attr_block.attr, | |
536 | &gdlm_attr_withdraw.attr, | |
e1b28aab | 537 | &gdlm_attr_jid.attr, |
f057f6cd SW |
538 | &gdlm_attr_first.attr, |
539 | &gdlm_attr_first_done.attr, | |
540 | &gdlm_attr_recover.attr, | |
541 | &gdlm_attr_recover_done.attr, | |
542 | &gdlm_attr_recover_status.attr, | |
ea67eedb | 543 | NULL, |
b3b94faa DT |
544 | }; |
545 | ||
b3b94faa DT |
546 | /* |
547 | * get and set struct gfs2_tune fields | |
548 | */ | |
549 | ||
550 | static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) | |
551 | { | |
3204a6c0 DT |
552 | return snprintf(buf, PAGE_SIZE, "%u %u\n", |
553 | sdp->sd_tune.gt_quota_scale_num, | |
554 | sdp->sd_tune.gt_quota_scale_den); | |
b3b94faa DT |
555 | } |
556 | ||
557 | static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, | |
558 | size_t len) | |
559 | { | |
560 | struct gfs2_tune *gt = &sdp->sd_tune; | |
561 | unsigned int x, y; | |
562 | ||
563 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 564 | return -EPERM; |
b3b94faa DT |
565 | |
566 | if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) | |
567 | return -EINVAL; | |
568 | ||
569 | spin_lock(>->gt_spin); | |
570 | gt->gt_quota_scale_num = x; | |
571 | gt->gt_quota_scale_den = y; | |
572 | spin_unlock(>->gt_spin); | |
573 | return len; | |
574 | } | |
575 | ||
576 | static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, | |
577 | int check_zero, const char *buf, size_t len) | |
578 | { | |
579 | struct gfs2_tune *gt = &sdp->sd_tune; | |
580 | unsigned int x; | |
e50ead48 | 581 | int error; |
b3b94faa DT |
582 | |
583 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 584 | return -EPERM; |
b3b94faa | 585 | |
e50ead48 FF |
586 | error = kstrtouint(buf, 0, &x); |
587 | if (error) | |
588 | return error; | |
b3b94faa DT |
589 | |
590 | if (check_zero && !x) | |
591 | return -EINVAL; | |
592 | ||
593 | spin_lock(>->gt_spin); | |
594 | *field = x; | |
595 | spin_unlock(>->gt_spin); | |
596 | return len; | |
597 | } | |
598 | ||
b3b94faa | 599 | #define TUNE_ATTR_3(name, show, store) \ |
48c2b613 | 600 | static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) |
b3b94faa DT |
601 | |
602 | #define TUNE_ATTR_2(name, store) \ | |
603 | static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ | |
604 | { \ | |
3204a6c0 | 605 | return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ |
b3b94faa DT |
606 | } \ |
607 | TUNE_ATTR_3(name, name##_show, store) | |
608 | ||
609 | #define TUNE_ATTR(name, check_zero) \ | |
610 | static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ | |
611 | { \ | |
612 | return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ | |
613 | } \ | |
614 | TUNE_ATTR_2(name, name##_store) | |
615 | ||
b3b94faa DT |
616 | TUNE_ATTR(quota_warn_period, 0); |
617 | TUNE_ATTR(quota_quantum, 0); | |
b3b94faa DT |
618 | TUNE_ATTR(max_readahead, 0); |
619 | TUNE_ATTR(complain_secs, 0); | |
b3b94faa DT |
620 | TUNE_ATTR(statfs_slow, 0); |
621 | TUNE_ATTR(new_files_jdata, 0); | |
b3b94faa | 622 | TUNE_ATTR(statfs_quantum, 1); |
b3b94faa DT |
623 | TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); |
624 | ||
625 | static struct attribute *tune_attrs[] = { | |
b3b94faa DT |
626 | &tune_attr_quota_warn_period.attr, |
627 | &tune_attr_quota_quantum.attr, | |
b3b94faa DT |
628 | &tune_attr_max_readahead.attr, |
629 | &tune_attr_complain_secs.attr, | |
b3b94faa | 630 | &tune_attr_statfs_slow.attr, |
b3b94faa | 631 | &tune_attr_statfs_quantum.attr, |
b3b94faa DT |
632 | &tune_attr_quota_scale.attr, |
633 | &tune_attr_new_files_jdata.attr, | |
ea67eedb | 634 | NULL, |
b3b94faa DT |
635 | }; |
636 | ||
29695254 | 637 | static const struct attribute_group tune_group = { |
b3b94faa | 638 | .name = "tune", |
ea67eedb | 639 | .attrs = tune_attrs, |
b3b94faa DT |
640 | }; |
641 | ||
29695254 | 642 | static const struct attribute_group lock_module_group = { |
f057f6cd SW |
643 | .name = "lock_module", |
644 | .attrs = lock_module_attrs, | |
645 | }; | |
646 | ||
b3b94faa DT |
647 | int gfs2_sys_fs_add(struct gfs2_sbd *sdp) |
648 | { | |
440d6da2 | 649 | struct super_block *sb = sdp->sd_vfs; |
b3b94faa | 650 | int error; |
440d6da2 SW |
651 | char ro[20]; |
652 | char spectator[20]; | |
653 | char *envp[] = { ro, spectator, NULL }; | |
654 | ||
bc98a42c | 655 | sprintf(ro, "RDONLY=%d", sb_rdonly(sb)); |
440d6da2 | 656 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); |
b3b94faa | 657 | |
c2a04b02 | 658 | init_completion(&sdp->sd_kobj_unregister); |
9bec101a | 659 | sdp->sd_kobj.kset = gfs2_kset; |
901195ed GKH |
660 | error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, |
661 | "%s", sdp->sd_table_name); | |
b3b94faa | 662 | if (error) |
0d515210 | 663 | goto fail_reg; |
b3b94faa | 664 | |
b3b94faa DT |
665 | error = sysfs_create_group(&sdp->sd_kobj, &tune_group); |
666 | if (error) | |
f6eb5349 | 667 | goto fail_reg; |
b3b94faa | 668 | |
f057f6cd SW |
669 | error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); |
670 | if (error) | |
671 | goto fail_tune; | |
672 | ||
31e54b01 SW |
673 | error = sysfs_create_link(&sdp->sd_kobj, |
674 | &disk_to_dev(sb->s_bdev->bd_disk)->kobj, | |
675 | "device"); | |
676 | if (error) | |
677 | goto fail_lock_module; | |
678 | ||
440d6da2 | 679 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); |
b3b94faa DT |
680 | return 0; |
681 | ||
31e54b01 SW |
682 | fail_lock_module: |
683 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); | |
f057f6cd SW |
684 | fail_tune: |
685 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); | |
a91ea69f | 686 | fail_reg: |
af38816e | 687 | fs_err(sdp, "error %d adding sysfs files\n", error); |
fbcde197 | 688 | kobject_put(&sdp->sd_kobj); |
c2a04b02 | 689 | wait_for_completion(&sdp->sd_kobj_unregister); |
0d515210 | 690 | sb->s_fs_info = NULL; |
b3b94faa DT |
691 | return error; |
692 | } | |
693 | ||
694 | void gfs2_sys_fs_del(struct gfs2_sbd *sdp) | |
695 | { | |
31e54b01 | 696 | sysfs_remove_link(&sdp->sd_kobj, "device"); |
b3b94faa | 697 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); |
f057f6cd | 698 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); |
197b12d6 | 699 | kobject_put(&sdp->sd_kobj); |
c2a04b02 | 700 | wait_for_completion(&sdp->sd_kobj_unregister); |
b3b94faa DT |
701 | } |
702 | ||
fdd1062e SW |
703 | static int gfs2_uevent(struct kset *kset, struct kobject *kobj, |
704 | struct kobj_uevent_env *env) | |
705 | { | |
706 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
32e471ef | 707 | struct super_block *s = sdp->sd_vfs; |
02e3cc70 | 708 | |
fdd1062e SW |
709 | add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); |
710 | add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); | |
ba6e9364 | 711 | if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
feb47ca9 | 712 | add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); |
85787090 CH |
713 | if (!uuid_is_null(&s->s_uuid)) |
714 | add_uevent_var(env, "UUID=%pUB", &s->s_uuid); | |
fdd1062e SW |
715 | return 0; |
716 | } | |
717 | ||
9cd43611 | 718 | static const struct kset_uevent_ops gfs2_uevent_ops = { |
fdd1062e SW |
719 | .uevent = gfs2_uevent, |
720 | }; | |
721 | ||
b3b94faa DT |
722 | int gfs2_sys_init(void) |
723 | { | |
fdd1062e | 724 | gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); |
9bec101a GKH |
725 | if (!gfs2_kset) |
726 | return -ENOMEM; | |
727 | return 0; | |
b3b94faa DT |
728 | } |
729 | ||
730 | void gfs2_sys_uninit(void) | |
731 | { | |
9bec101a | 732 | kset_unregister(gfs2_kset); |
b3b94faa DT |
733 | } |
734 |