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