git.oblomov.eu Git - linux-2.6/blob - fs/gfs2/sys.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   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
   7  * of the GNU General Public License version 2.
   8  */
   9
  10 #include <linux/sched.h>
  11 #include <linux/slab.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/completion.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/module.h>
  16 #include <linux/kobject.h>
  17 #include <asm/uaccess.h>
  18 #include <linux/gfs2_ondisk.h>
  19
  20 #include "gfs2.h"
  21 #include "incore.h"
  22 #include "sys.h"
  23 #include "super.h"
  24 #include "glock.h"
  25 #include "quota.h"
  26 #include "util.h"
  27
  28 static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
  29 {
  30         return snprintf(buf, PAGE_SIZE, "%u:%u\n",
  31                         MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
  32 }
  33
  34 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
  35 {
  36         return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
  37 }
  38
  39 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
  40 {
  41         unsigned int count;
  42
  43         mutex_lock(&sdp->sd_freeze_lock);
  44         count = sdp->sd_freeze_count;
  45         mutex_unlock(&sdp->sd_freeze_lock);
  46
  47         return snprintf(buf, PAGE_SIZE, "%u\n", count);
  48 }
  49
  50 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
  51 {
  52         ssize_t ret = len;
  53         int error = 0;
  54         int n = simple_strtol(buf, NULL, 0);
  55
  56         if (!capable(CAP_SYS_ADMIN))
  57                 return -EACCES;
  58
  59         switch (n) {
  60         case 0:
  61                 gfs2_unfreeze_fs(sdp);
  62                 break;
  63         case 1:
  64                 error = gfs2_freeze_fs(sdp);
  65                 break;
  66         default:
  67                 ret = -EINVAL;
  68         }
  69
  70         if (error)
  71                 fs_warn(sdp, "freeze %d error %d", n, error);
  72
  73         return ret;
  74 }
  75
  76 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
  77 {
  78         unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
  79         return snprintf(buf, PAGE_SIZE, "%u\n", b);
  80 }
  81
  82 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
  83 {
  84         if (!capable(CAP_SYS_ADMIN))
  85                 return -EACCES;
  86
  87         if (simple_strtol(buf, NULL, 0) != 1)
  88                 return -EINVAL;
  89
  90         gfs2_lm_withdraw(sdp,
  91                 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
  92                 sdp->sd_fsname);
  93         return len;
  94 }
  95
  96 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
  97                                  size_t len)
  98 {
  99         if (!capable(CAP_SYS_ADMIN))
 100                 return -EACCES;
 101
 102         if (simple_strtol(buf, NULL, 0) != 1)
 103                 return -EINVAL;
 104
 105         gfs2_statfs_sync(sdp);
 106         return len;
 107 }
 108
 109 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
 110                                 size_t len)
 111 {
 112         if (!capable(CAP_SYS_ADMIN))
 113                 return -EACCES;
 114
 115         if (simple_strtol(buf, NULL, 0) != 1)
 116                 return -EINVAL;
 117
 118         gfs2_quota_sync(sdp);
 119         return len;
 120 }
 121
 122 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
 123                                         size_t len)
 124 {
 125         u32 id;
 126
 127         if (!capable(CAP_SYS_ADMIN))
 128                 return -EACCES;
 129
 130         id = simple_strtoul(buf, NULL, 0);
 131
 132         gfs2_quota_refresh(sdp, 1, id);
 133         return len;
 134 }
 135
 136 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
 137                                          size_t len)
 138 {
 139         u32 id;
 140
 141         if (!capable(CAP_SYS_ADMIN))
 142                 return -EACCES;
 143
 144         id = simple_strtoul(buf, NULL, 0);
 145
 146         gfs2_quota_refresh(sdp, 0, id);
 147         return len;
 148 }
 149
 150 struct gfs2_attr {
 151         struct attribute attr;
 152         ssize_t (*show)(struct gfs2_sbd *, char *);
 153         ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
 154 };
 155
 156 #define GFS2_ATTR(name, mode, show, store) \
 157 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
 158
 159 GFS2_ATTR(id,                  0444, id_show,       NULL);
 160 GFS2_ATTR(fsname,              0444, fsname_show,   NULL);
 161 GFS2_ATTR(freeze,              0644, freeze_show,   freeze_store);
 162 GFS2_ATTR(withdraw,            0644, withdraw_show, withdraw_store);
 163 GFS2_ATTR(statfs_sync,         0200, NULL,          statfs_sync_store);
 164 GFS2_ATTR(quota_sync,          0200, NULL,          quota_sync_store);
 165 GFS2_ATTR(quota_refresh_user,  0200, NULL,          quota_refresh_user_store);
 166 GFS2_ATTR(quota_refresh_group, 0200, NULL,          quota_refresh_group_store);
 167
 168 static struct attribute *gfs2_attrs[] = {
 169         &gfs2_attr_id.attr,
 170         &gfs2_attr_fsname.attr,
 171         &gfs2_attr_freeze.attr,
 172         &gfs2_attr_withdraw.attr,
 173         &gfs2_attr_statfs_sync.attr,
 174         &gfs2_attr_quota_sync.attr,
 175         &gfs2_attr_quota_refresh_user.attr,
 176         &gfs2_attr_quota_refresh_group.attr,
 177         NULL,
 178 };
 179
 180 static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
 181                               char *buf)
 182 {
 183         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 184         struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
 185         return a->show ? a->show(sdp, buf) : 0;
 186 }
 187
 188 static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
 189                                const char *buf, size_t len)
 190 {
 191         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 192         struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
 193         return a->store ? a->store(sdp, buf, len) : len;
 194 }
 195
 196 static struct sysfs_ops gfs2_attr_ops = {
 197         .show  = gfs2_attr_show,
 198         .store = gfs2_attr_store,
 199 };
 200
 201 static struct kobj_type gfs2_ktype = {
 202         .default_attrs = gfs2_attrs,
 203         .sysfs_ops     = &gfs2_attr_ops,
 204 };
 205
 206 static struct kset *gfs2_kset;
 207
 208 /*
 209  * display struct lm_lockstruct fields
 210  */
 211
 212 struct lockstruct_attr {
 213         struct attribute attr;
 214         ssize_t (*show)(struct gfs2_sbd *, char *);
 215 };
 216
 217 #define LOCKSTRUCT_ATTR(name, fmt)                                          \
 218 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                 \
 219 {                                                                           \
 220         return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_lockstruct.ls_##name); \
 221 }                                                                           \
 222 static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
 223
 224 LOCKSTRUCT_ATTR(jid,      "%u\n");
 225 LOCKSTRUCT_ATTR(first,    "%u\n");
 226
 227 static struct attribute *lockstruct_attrs[] = {
 228         &lockstruct_attr_jid.attr,
 229         &lockstruct_attr_first.attr,
 230         NULL,
 231 };
 232
 233 /*
 234  * lock_module. Originally from lock_dlm
 235  */
 236
 237 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
 238 {
 239         const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
 240         return sprintf(buf, "%s\n", ops->lm_proto_name);
 241 }
 242
 243 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
 244 {
 245         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 246         ssize_t ret;
 247         int val = 0;
 248
 249         if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
 250                 val = 1;
 251         ret = sprintf(buf, "%d\n", val);
 252         return ret;
 253 }
 254
 255 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 256 {
 257         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 258         ssize_t ret = len;
 259         int val;
 260
 261         val = simple_strtol(buf, NULL, 0);
 262
 263         if (val == 1)
 264                 set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
 265         else if (val == 0) {
 266                 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
 267                 smp_mb__after_clear_bit();
 268                 gfs2_glock_thaw(sdp);
 269         } else {
 270                 ret = -EINVAL;
 271         }
 272         return ret;
 273 }
 274
 275 static ssize_t lkid_show(struct gfs2_sbd *sdp, char *buf)
 276 {
 277         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 278         return sprintf(buf, "%u\n", ls->ls_id);
 279 }
 280
 281 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
 282 {
 283         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 284         return sprintf(buf, "%d\n", ls->ls_first);
 285 }
 286
 287 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
 288 {
 289         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 290         return sprintf(buf, "%d\n", ls->ls_first_done);
 291 }
 292
 293 static ssize_t recover_show(struct gfs2_sbd *sdp, char *buf)
 294 {
 295         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 296         return sprintf(buf, "%d\n", ls->ls_recover_jid);
 297 }
 298
 299 static void gfs2_jdesc_make_dirty(struct gfs2_sbd *sdp, unsigned int jid)
 300 {
 301         struct gfs2_jdesc *jd;
 302
 303         spin_lock(&sdp->sd_jindex_spin);
 304         list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
 305                 if (jd->jd_jid != jid)
 306                         continue;
 307                 jd->jd_dirty = 1;
 308                 break;
 309         }
 310         spin_unlock(&sdp->sd_jindex_spin);
 311 }
 312
 313 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 314 {
 315         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 316         ls->ls_recover_jid = simple_strtol(buf, NULL, 0);
 317         gfs2_jdesc_make_dirty(sdp, ls->ls_recover_jid);
 318         if (sdp->sd_recoverd_process)
 319                 wake_up_process(sdp->sd_recoverd_process);
 320         return len;
 321 }
 322
 323 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
 324 {
 325         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 326         return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
 327 }
 328
 329 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
 330 {
 331         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 332         return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
 333 }
 334
 335 struct gdlm_attr {
 336         struct attribute attr;
 337         ssize_t (*show)(struct gfs2_sbd *sdp, char *);
 338         ssize_t (*store)(struct gfs2_sbd *sdp, const char *, size_t);
 339 };
 340
 341 #define GDLM_ATTR(_name,_mode,_show,_store) \
 342 static struct gdlm_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
 343
 344 GDLM_ATTR(proto_name,     0444, proto_name_show,     NULL);
 345 GDLM_ATTR(block,          0644, block_show,          block_store);
 346 GDLM_ATTR(withdraw,       0644, withdraw_show,       withdraw_store);
 347 GDLM_ATTR(id,             0444, lkid_show,           NULL);
 348 GDLM_ATTR(first,          0444, lkfirst_show,        NULL);
 349 GDLM_ATTR(first_done,     0444, first_done_show,     NULL);
 350 GDLM_ATTR(recover,        0644, recover_show,        recover_store);
 351 GDLM_ATTR(recover_done,   0444, recover_done_show,   NULL);
 352 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
 353
 354 static struct attribute *lock_module_attrs[] = {
 355         &gdlm_attr_proto_name.attr,
 356         &gdlm_attr_block.attr,
 357         &gdlm_attr_withdraw.attr,
 358         &gdlm_attr_id.attr,
 359         &lockstruct_attr_jid.attr,
 360         &gdlm_attr_first.attr,
 361         &gdlm_attr_first_done.attr,
 362         &gdlm_attr_recover.attr,
 363         &gdlm_attr_recover_done.attr,
 364         &gdlm_attr_recover_status.attr,
 365         NULL,
 366 };
 367
 368 /*
 369  * display struct gfs2_args fields
 370  */
 371
 372 struct args_attr {
 373         struct attribute attr;
 374         ssize_t (*show)(struct gfs2_sbd *, char *);
 375 };
 376
 377 #define ARGS_ATTR(name, fmt)                                                \
 378 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                 \
 379 {                                                                           \
 380         return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_args.ar_##name);       \
 381 }                                                                           \
 382 static struct args_attr args_attr_##name = __ATTR_RO(name)
 383
 384 ARGS_ATTR(lockproto,       "%s\n");
 385 ARGS_ATTR(locktable,       "%s\n");
 386 ARGS_ATTR(hostdata,        "%s\n");
 387 ARGS_ATTR(spectator,       "%d\n");
 388 ARGS_ATTR(ignore_local_fs, "%d\n");
 389 ARGS_ATTR(localcaching,    "%d\n");
 390 ARGS_ATTR(localflocks,     "%d\n");
 391 ARGS_ATTR(debug,           "%d\n");
 392 ARGS_ATTR(upgrade,         "%d\n");
 393 ARGS_ATTR(posix_acl,       "%d\n");
 394 ARGS_ATTR(quota,           "%u\n");
 395 ARGS_ATTR(suiddir,         "%d\n");
 396 ARGS_ATTR(data,            "%d\n");
 397
 398 static struct attribute *args_attrs[] = {
 399         &args_attr_lockproto.attr,
 400         &args_attr_locktable.attr,
 401         &args_attr_hostdata.attr,
 402         &args_attr_spectator.attr,
 403         &args_attr_ignore_local_fs.attr,
 404         &args_attr_localcaching.attr,
 405         &args_attr_localflocks.attr,
 406         &args_attr_debug.attr,
 407         &args_attr_upgrade.attr,
 408         &args_attr_posix_acl.attr,
 409         &args_attr_quota.attr,
 410         &args_attr_suiddir.attr,
 411         &args_attr_data.attr,
 412         NULL,
 413 };
 414
 415 /*
 416  * get and set struct gfs2_tune fields
 417  */
 418
 419 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
 420 {
 421         return snprintf(buf, PAGE_SIZE, "%u %u\n",
 422                         sdp->sd_tune.gt_quota_scale_num,
 423                         sdp->sd_tune.gt_quota_scale_den);
 424 }
 425
 426 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
 427                                  size_t len)
 428 {
 429         struct gfs2_tune *gt = &sdp->sd_tune;
 430         unsigned int x, y;
 431
 432         if (!capable(CAP_SYS_ADMIN))
 433                 return -EACCES;
 434
 435         if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
 436                 return -EINVAL;
 437
 438         spin_lock(&gt->gt_spin);
 439         gt->gt_quota_scale_num = x;
 440         gt->gt_quota_scale_den = y;
 441         spin_unlock(&gt->gt_spin);
 442         return len;
 443 }
 444
 445 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
 446                         int check_zero, const char *buf, size_t len)
 447 {
 448         struct gfs2_tune *gt = &sdp->sd_tune;
 449         unsigned int x;
 450
 451         if (!capable(CAP_SYS_ADMIN))
 452                 return -EACCES;
 453
 454         x = simple_strtoul(buf, NULL, 0);
 455
 456         if (check_zero && !x)
 457                 return -EINVAL;
 458
 459         spin_lock(&gt->gt_spin);
 460         *field = x;
 461         spin_unlock(&gt->gt_spin);
 462         return len;
 463 }
 464
 465 struct tune_attr {
 466         struct attribute attr;
 467         ssize_t (*show)(struct gfs2_sbd *, char *);
 468         ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
 469 };
 470
 471 #define TUNE_ATTR_3(name, show, store)                                        \
 472 static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
 473
 474 #define TUNE_ATTR_2(name, store)                                              \
 475 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                   \
 476 {                                                                             \
 477         return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name);      \
 478 }                                                                             \
 479 TUNE_ATTR_3(name, name##_show, store)
 480
 481 #define TUNE_ATTR(name, check_zero)                                           \
 482 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
 483 {                                                                             \
 484         return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len);  \
 485 }                                                                             \
 486 TUNE_ATTR_2(name, name##_store)
 487
 488 #define TUNE_ATTR_DAEMON(name, process)                                       \
 489 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
 490 {                                                                             \
 491         ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len);      \
 492         wake_up_process(sdp->sd_##process);                                   \
 493         return r;                                                             \
 494 }                                                                             \
 495 TUNE_ATTR_2(name, name##_store)
 496
 497 TUNE_ATTR(incore_log_blocks, 0);
 498 TUNE_ATTR(log_flush_secs, 0);
 499 TUNE_ATTR(quota_warn_period, 0);
 500 TUNE_ATTR(quota_quantum, 0);
 501 TUNE_ATTR(max_readahead, 0);
 502 TUNE_ATTR(complain_secs, 0);
 503 TUNE_ATTR(statfs_slow, 0);
 504 TUNE_ATTR(new_files_jdata, 0);
 505 TUNE_ATTR(quota_simul_sync, 1);
 506 TUNE_ATTR(stall_secs, 1);
 507 TUNE_ATTR(statfs_quantum, 1);
 508 TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
 509 TUNE_ATTR_DAEMON(logd_secs, logd_process);
 510 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
 511
 512 static struct attribute *tune_attrs[] = {
 513         &tune_attr_incore_log_blocks.attr,
 514         &tune_attr_log_flush_secs.attr,
 515         &tune_attr_quota_warn_period.attr,
 516         &tune_attr_quota_quantum.attr,
 517         &tune_attr_max_readahead.attr,
 518         &tune_attr_complain_secs.attr,
 519         &tune_attr_statfs_slow.attr,
 520         &tune_attr_quota_simul_sync.attr,
 521         &tune_attr_stall_secs.attr,
 522         &tune_attr_statfs_quantum.attr,
 523         &tune_attr_recoverd_secs.attr,
 524         &tune_attr_logd_secs.attr,
 525         &tune_attr_quota_scale.attr,
 526         &tune_attr_new_files_jdata.attr,
 527         NULL,
 528 };
 529
 530 static struct attribute_group lockstruct_group = {
 531         .name = "lockstruct",
 532         .attrs = lockstruct_attrs,
 533 };
 534
 535 static struct attribute_group args_group = {
 536         .name = "args",
 537         .attrs = args_attrs,
 538 };
 539
 540 static struct attribute_group tune_group = {
 541         .name = "tune",
 542         .attrs = tune_attrs,
 543 };
 544
 545 static struct attribute_group lock_module_group = {
 546         .name = "lock_module",
 547         .attrs = lock_module_attrs,
 548 };
 549
 550 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
 551 {
 552         int error;
 553
 554         sdp->sd_kobj.kset = gfs2_kset;
 555         error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
 556                                      "%s", sdp->sd_table_name);
 557         if (error)
 558                 goto fail;
 559
 560         error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
 561         if (error)
 562                 goto fail_reg;
 563
 564         error = sysfs_create_group(&sdp->sd_kobj, &args_group);
 565         if (error)
 566                 goto fail_lockstruct;
 567
 568         error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
 569         if (error)
 570                 goto fail_args;
 571
 572         error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
 573         if (error)
 574                 goto fail_tune;
 575
 576         kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
 577         return 0;
 578
 579 fail_tune:
 580         sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 581 fail_args:
 582         sysfs_remove_group(&sdp->sd_kobj, &args_group);
 583 fail_lockstruct:
 584         sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
 585 fail_reg:
 586         kobject_put(&sdp->sd_kobj);
 587 fail:
 588         fs_err(sdp, "error %d adding sysfs files", error);
 589         return error;
 590 }
 591
 592 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
 593 {
 594         sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 595         sysfs_remove_group(&sdp->sd_kobj, &args_group);
 596         sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
 597         sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
 598         kobject_put(&sdp->sd_kobj);
 599 }
 600
 601 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
 602                        struct kobj_uevent_env *env)
 603 {
 604         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 605         add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
 606         add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
 607         return 0;
 608 }
 609
 610 static struct kset_uevent_ops gfs2_uevent_ops = {
 611         .uevent = gfs2_uevent,
 612 };
 613
 614
 615 int gfs2_sys_init(void)
 616 {
 617         gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
 618         if (!gfs2_kset)
 619                 return -ENOMEM;
 620         return 0;
 621 }
 622
 623 void gfs2_sys_uninit(void)
 624 {
 625         kset_unregister(gfs2_kset);
 626 }
 627