Commit | Line | Data |
---|---|---|
b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
d77d1b58 JP |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
11 | ||
b3b94faa | 12 | #include <linux/sched.h> |
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 | |
d564053f | 99 | return snprintf(buf, PAGE_SIZE, "%u\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; | |
13466985 SW |
243 | if (gltype == LM_TYPE_NONDISK && glnum == GFS2_TRANS_LOCK) |
244 | glops = &gfs2_trans_glops; | |
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); |
f057f6cd SW |
336 | smp_mb__after_clear_bit(); |
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 | ||
f057f6cd | 410 | spin_lock(&sdp->sd_jindex_spin); |
fe64d517 SW |
411 | rv = -EBUSY; |
412 | if (sdp->sd_jdesc->jd_jid == jid) | |
413 | goto out; | |
414 | rv = -ENOENT; | |
f057f6cd SW |
415 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { |
416 | if (jd->jd_jid != jid) | |
417 | continue; | |
6ecd7c2d | 418 | rv = gfs2_recover_journal(jd, false); |
f057f6cd SW |
419 | break; |
420 | } | |
fe64d517 | 421 | out: |
f057f6cd | 422 | spin_unlock(&sdp->sd_jindex_spin); |
e0c2a9aa DT |
423 | return rv; |
424 | } | |
425 | ||
426 | static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) | |
427 | { | |
428 | unsigned jid; | |
429 | int rv; | |
430 | ||
431 | rv = sscanf(buf, "%u", &jid); | |
432 | if (rv != 1) | |
433 | return -EINVAL; | |
434 | ||
1a058f52 DT |
435 | if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { |
436 | rv = -ESHUTDOWN; | |
437 | goto out; | |
438 | } | |
e0c2a9aa | 439 | |
1a058f52 DT |
440 | rv = gfs2_recover_set(sdp, jid); |
441 | out: | |
fe64d517 | 442 | return rv ? rv : len; |
f057f6cd SW |
443 | } |
444 | ||
445 | static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) | |
446 | { | |
447 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
448 | return sprintf(buf, "%d\n", ls->ls_recover_jid_done); | |
449 | } | |
450 | ||
451 | static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) | |
452 | { | |
453 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
454 | return sprintf(buf, "%d\n", ls->ls_recover_jid_status); | |
455 | } | |
456 | ||
e1b28aab SW |
457 | static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) |
458 | { | |
feb47ca9 | 459 | return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); |
e1b28aab SW |
460 | } |
461 | ||
ba6e9364 SW |
462 | static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) |
463 | { | |
feb47ca9 | 464 | int jid; |
ba6e9364 SW |
465 | int rv; |
466 | ||
feb47ca9 | 467 | rv = sscanf(buf, "%d", &jid); |
ba6e9364 SW |
468 | if (rv != 1) |
469 | return -EINVAL; | |
3942ae53 SW |
470 | rv = wait_for_completion_killable(&sdp->sd_locking_init); |
471 | if (rv) | |
472 | return rv; | |
ba6e9364 SW |
473 | spin_lock(&sdp->sd_jindex_spin); |
474 | rv = -EINVAL; | |
ba6e9364 SW |
475 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
476 | goto out; | |
477 | rv = -EBUSY; | |
feb47ca9 | 478 | if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) |
ba6e9364 | 479 | goto out; |
feb47ca9 SW |
480 | rv = 0; |
481 | if (sdp->sd_args.ar_spectator && jid > 0) | |
482 | rv = jid = -EINVAL; | |
ba6e9364 | 483 | sdp->sd_lockstruct.ls_jid = jid; |
feb47ca9 | 484 | clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
ba6e9364 SW |
485 | smp_mb__after_clear_bit(); |
486 | wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); | |
ba6e9364 SW |
487 | out: |
488 | spin_unlock(&sdp->sd_jindex_spin); | |
489 | return rv ? rv : len; | |
490 | } | |
491 | ||
f057f6cd | 492 | #define GDLM_ATTR(_name,_mode,_show,_store) \ |
48c2b613 | 493 | static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) |
f057f6cd | 494 | |
d7e623da SW |
495 | GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); |
496 | GDLM_ATTR(block, 0644, block_show, block_store); | |
fd95e81c | 497 | GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store); |
ba6e9364 SW |
498 | GDLM_ATTR(jid, 0644, jid_show, jid_store); |
499 | GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); | |
d7e623da SW |
500 | GDLM_ATTR(first_done, 0444, first_done_show, NULL); |
501 | GDLM_ATTR(recover, 0600, NULL, recover_store); | |
502 | GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); | |
503 | GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); | |
f057f6cd SW |
504 | |
505 | static struct attribute *lock_module_attrs[] = { | |
506 | &gdlm_attr_proto_name.attr, | |
507 | &gdlm_attr_block.attr, | |
508 | &gdlm_attr_withdraw.attr, | |
e1b28aab | 509 | &gdlm_attr_jid.attr, |
f057f6cd SW |
510 | &gdlm_attr_first.attr, |
511 | &gdlm_attr_first_done.attr, | |
512 | &gdlm_attr_recover.attr, | |
513 | &gdlm_attr_recover_done.attr, | |
514 | &gdlm_attr_recover_status.attr, | |
ea67eedb | 515 | NULL, |
b3b94faa DT |
516 | }; |
517 | ||
b3b94faa DT |
518 | /* |
519 | * get and set struct gfs2_tune fields | |
520 | */ | |
521 | ||
522 | static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) | |
523 | { | |
3204a6c0 DT |
524 | return snprintf(buf, PAGE_SIZE, "%u %u\n", |
525 | sdp->sd_tune.gt_quota_scale_num, | |
526 | sdp->sd_tune.gt_quota_scale_den); | |
b3b94faa DT |
527 | } |
528 | ||
529 | static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, | |
530 | size_t len) | |
531 | { | |
532 | struct gfs2_tune *gt = &sdp->sd_tune; | |
533 | unsigned int x, y; | |
534 | ||
535 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 536 | return -EPERM; |
b3b94faa DT |
537 | |
538 | if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) | |
539 | return -EINVAL; | |
540 | ||
541 | spin_lock(>->gt_spin); | |
542 | gt->gt_quota_scale_num = x; | |
543 | gt->gt_quota_scale_den = y; | |
544 | spin_unlock(>->gt_spin); | |
545 | return len; | |
546 | } | |
547 | ||
548 | static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, | |
549 | int check_zero, const char *buf, size_t len) | |
550 | { | |
551 | struct gfs2_tune *gt = &sdp->sd_tune; | |
552 | unsigned int x; | |
553 | ||
554 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 555 | return -EPERM; |
b3b94faa DT |
556 | |
557 | x = simple_strtoul(buf, NULL, 0); | |
558 | ||
559 | if (check_zero && !x) | |
560 | return -EINVAL; | |
561 | ||
562 | spin_lock(>->gt_spin); | |
563 | *field = x; | |
564 | spin_unlock(>->gt_spin); | |
565 | return len; | |
566 | } | |
567 | ||
b3b94faa | 568 | #define TUNE_ATTR_3(name, show, store) \ |
48c2b613 | 569 | static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) |
b3b94faa DT |
570 | |
571 | #define TUNE_ATTR_2(name, store) \ | |
572 | static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ | |
573 | { \ | |
3204a6c0 | 574 | return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ |
b3b94faa DT |
575 | } \ |
576 | TUNE_ATTR_3(name, name##_show, store) | |
577 | ||
578 | #define TUNE_ATTR(name, check_zero) \ | |
579 | static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ | |
580 | { \ | |
581 | return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ | |
582 | } \ | |
583 | TUNE_ATTR_2(name, name##_store) | |
584 | ||
b3b94faa DT |
585 | TUNE_ATTR(quota_warn_period, 0); |
586 | TUNE_ATTR(quota_quantum, 0); | |
b3b94faa DT |
587 | TUNE_ATTR(max_readahead, 0); |
588 | TUNE_ATTR(complain_secs, 0); | |
b3b94faa DT |
589 | TUNE_ATTR(statfs_slow, 0); |
590 | TUNE_ATTR(new_files_jdata, 0); | |
b3b94faa | 591 | TUNE_ATTR(statfs_quantum, 1); |
b3b94faa DT |
592 | TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); |
593 | ||
594 | static struct attribute *tune_attrs[] = { | |
b3b94faa DT |
595 | &tune_attr_quota_warn_period.attr, |
596 | &tune_attr_quota_quantum.attr, | |
b3b94faa DT |
597 | &tune_attr_max_readahead.attr, |
598 | &tune_attr_complain_secs.attr, | |
b3b94faa | 599 | &tune_attr_statfs_slow.attr, |
b3b94faa | 600 | &tune_attr_statfs_quantum.attr, |
b3b94faa DT |
601 | &tune_attr_quota_scale.attr, |
602 | &tune_attr_new_files_jdata.attr, | |
ea67eedb | 603 | NULL, |
b3b94faa DT |
604 | }; |
605 | ||
b3b94faa DT |
606 | static struct attribute_group tune_group = { |
607 | .name = "tune", | |
ea67eedb | 608 | .attrs = tune_attrs, |
b3b94faa DT |
609 | }; |
610 | ||
f057f6cd SW |
611 | static struct attribute_group lock_module_group = { |
612 | .name = "lock_module", | |
613 | .attrs = lock_module_attrs, | |
614 | }; | |
615 | ||
b3b94faa DT |
616 | int gfs2_sys_fs_add(struct gfs2_sbd *sdp) |
617 | { | |
440d6da2 | 618 | struct super_block *sb = sdp->sd_vfs; |
b3b94faa | 619 | int error; |
440d6da2 SW |
620 | char ro[20]; |
621 | char spectator[20]; | |
622 | char *envp[] = { ro, spectator, NULL }; | |
0d515210 | 623 | int sysfs_frees_sdp = 0; |
440d6da2 SW |
624 | |
625 | sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0); | |
626 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); | |
b3b94faa | 627 | |
9bec101a | 628 | sdp->sd_kobj.kset = gfs2_kset; |
901195ed GKH |
629 | error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, |
630 | "%s", sdp->sd_table_name); | |
b3b94faa | 631 | if (error) |
0d515210 | 632 | goto fail_reg; |
b3b94faa | 633 | |
0d515210 BP |
634 | sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling |
635 | function gfs2_sbd_release. */ | |
b3b94faa DT |
636 | error = sysfs_create_group(&sdp->sd_kobj, &tune_group); |
637 | if (error) | |
f6eb5349 | 638 | goto fail_reg; |
b3b94faa | 639 | |
f057f6cd SW |
640 | error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); |
641 | if (error) | |
642 | goto fail_tune; | |
643 | ||
31e54b01 SW |
644 | error = sysfs_create_link(&sdp->sd_kobj, |
645 | &disk_to_dev(sb->s_bdev->bd_disk)->kobj, | |
646 | "device"); | |
647 | if (error) | |
648 | goto fail_lock_module; | |
649 | ||
440d6da2 | 650 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); |
b3b94faa DT |
651 | return 0; |
652 | ||
31e54b01 SW |
653 | fail_lock_module: |
654 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); | |
f057f6cd SW |
655 | fail_tune: |
656 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); | |
a91ea69f | 657 | fail_reg: |
0d515210 | 658 | free_percpu(sdp->sd_lkstats); |
65952fb4 | 659 | fs_err(sdp, "error %d adding sysfs files", error); |
0d515210 BP |
660 | if (sysfs_frees_sdp) |
661 | kobject_put(&sdp->sd_kobj); | |
662 | else | |
663 | kfree(sdp); | |
664 | sb->s_fs_info = NULL; | |
b3b94faa DT |
665 | return error; |
666 | } | |
667 | ||
668 | void gfs2_sys_fs_del(struct gfs2_sbd *sdp) | |
669 | { | |
31e54b01 | 670 | sysfs_remove_link(&sdp->sd_kobj, "device"); |
b3b94faa | 671 | sysfs_remove_group(&sdp->sd_kobj, &tune_group); |
f057f6cd | 672 | sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); |
197b12d6 | 673 | kobject_put(&sdp->sd_kobj); |
b3b94faa DT |
674 | } |
675 | ||
fdd1062e SW |
676 | static int gfs2_uevent(struct kset *kset, struct kobject *kobj, |
677 | struct kobj_uevent_env *env) | |
678 | { | |
679 | struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); | |
32e471ef SW |
680 | struct super_block *s = sdp->sd_vfs; |
681 | const u8 *uuid = s->s_uuid; | |
02e3cc70 | 682 | |
fdd1062e SW |
683 | add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); |
684 | add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); | |
ba6e9364 | 685 | if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
feb47ca9 | 686 | add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); |
f0b34ae6 JP |
687 | if (gfs2_uuid_valid(uuid)) |
688 | add_uevent_var(env, "UUID=%pUB", uuid); | |
fdd1062e SW |
689 | return 0; |
690 | } | |
691 | ||
9cd43611 | 692 | static const struct kset_uevent_ops gfs2_uevent_ops = { |
fdd1062e SW |
693 | .uevent = gfs2_uevent, |
694 | }; | |
695 | ||
b3b94faa DT |
696 | int gfs2_sys_init(void) |
697 | { | |
fdd1062e | 698 | gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); |
9bec101a GKH |
699 | if (!gfs2_kset) |
700 | return -ENOMEM; | |
701 | return 0; | |
b3b94faa DT |
702 | } |
703 | ||
704 | void gfs2_sys_uninit(void) | |
705 | { | |
9bec101a | 706 | kset_unregister(gfs2_kset); |
b3b94faa DT |
707 | } |
708 |