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 int gfs2_uuid_valid(const u8 *uuid)
  40 {
  41         int i;
  42
  43         for (i = 0; i < 16; i++) {
  44                 if (uuid[i])
  45                         return 1;
  46         }
  47         return 0;
  48 }
  49
  50 static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
  51 {
  52         const u8 *uuid = sdp->sd_sb.sb_uuid;
  53         buf[0] = '\0';
  54         if (!gfs2_uuid_valid(uuid))
  55                 return 0;
  56         return snprintf(buf, PAGE_SIZE, "%02X%02X%02X%02X-%02X%02X-"
  57                         "%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n",
  58                         uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5],
  59                         uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11],
  60                         uuid[12], uuid[13], uuid[14], uuid[15]);
  61 }
  62
  63 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
  64 {
  65         unsigned int count;
  66
  67         mutex_lock(&sdp->sd_freeze_lock);
  68         count = sdp->sd_freeze_count;
  69         mutex_unlock(&sdp->sd_freeze_lock);
  70
  71         return snprintf(buf, PAGE_SIZE, "%u\n", count);
  72 }
  73
  74 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
  75 {
  76         ssize_t ret = len;
  77         int error = 0;
  78         int n = simple_strtol(buf, NULL, 0);
  79
  80         if (!capable(CAP_SYS_ADMIN))
  81                 return -EACCES;
  82
  83         switch (n) {
  84         case 0:
  85                 gfs2_unfreeze_fs(sdp);
  86                 break;
  87         case 1:
  88                 error = gfs2_freeze_fs(sdp);
  89                 break;
  90         default:
  91                 ret = -EINVAL;
  92         }
  93
  94         if (error)
  95                 fs_warn(sdp, "freeze %d error %d", n, error);
  96
  97         return ret;
  98 }
  99
 100 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
 101 {
 102         unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
 103         return snprintf(buf, PAGE_SIZE, "%u\n", b);
 104 }
 105
 106 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 107 {
 108         if (!capable(CAP_SYS_ADMIN))
 109                 return -EACCES;
 110
 111         if (simple_strtol(buf, NULL, 0) != 1)
 112                 return -EINVAL;
 113
 114         gfs2_lm_withdraw(sdp,
 115                 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
 116                 sdp->sd_fsname);
 117         return len;
 118 }
 119
 120 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
 121                                  size_t len)
 122 {
 123         if (!capable(CAP_SYS_ADMIN))
 124                 return -EACCES;
 125
 126         if (simple_strtol(buf, NULL, 0) != 1)
 127                 return -EINVAL;
 128
 129         gfs2_statfs_sync(sdp);
 130         return len;
 131 }
 132
 133 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
 134                                 size_t len)
 135 {
 136         if (!capable(CAP_SYS_ADMIN))
 137                 return -EACCES;
 138
 139         if (simple_strtol(buf, NULL, 0) != 1)
 140                 return -EINVAL;
 141
 142         gfs2_quota_sync(sdp);
 143         return len;
 144 }
 145
 146 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
 147                                         size_t len)
 148 {
 149         u32 id;
 150
 151         if (!capable(CAP_SYS_ADMIN))
 152                 return -EACCES;
 153
 154         id = simple_strtoul(buf, NULL, 0);
 155
 156         gfs2_quota_refresh(sdp, 1, id);
 157         return len;
 158 }
 159
 160 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
 161                                          size_t len)
 162 {
 163         u32 id;
 164
 165         if (!capable(CAP_SYS_ADMIN))
 166                 return -EACCES;
 167
 168         id = simple_strtoul(buf, NULL, 0);
 169
 170         gfs2_quota_refresh(sdp, 0, id);
 171         return len;
 172 }
 173
 174 struct gfs2_attr {
 175         struct attribute attr;
 176         ssize_t (*show)(struct gfs2_sbd *, char *);
 177         ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
 178 };
 179
 180 #define GFS2_ATTR(name, mode, show, store) \
 181 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
 182
 183 GFS2_ATTR(id,                  0444, id_show,       NULL);
 184 GFS2_ATTR(fsname,              0444, fsname_show,   NULL);
 185 GFS2_ATTR(uuid,                0444, uuid_show,     NULL);
 186 GFS2_ATTR(freeze,              0644, freeze_show,   freeze_store);
 187 GFS2_ATTR(withdraw,            0644, withdraw_show, withdraw_store);
 188 GFS2_ATTR(statfs_sync,         0200, NULL,          statfs_sync_store);
 189 GFS2_ATTR(quota_sync,          0200, NULL,          quota_sync_store);
 190 GFS2_ATTR(quota_refresh_user,  0200, NULL,          quota_refresh_user_store);
 191 GFS2_ATTR(quota_refresh_group, 0200, NULL,          quota_refresh_group_store);
 192
 193 static struct attribute *gfs2_attrs[] = {
 194         &gfs2_attr_id.attr,
 195         &gfs2_attr_fsname.attr,
 196         &gfs2_attr_uuid.attr,
 197         &gfs2_attr_freeze.attr,
 198         &gfs2_attr_withdraw.attr,
 199         &gfs2_attr_statfs_sync.attr,
 200         &gfs2_attr_quota_sync.attr,
 201         &gfs2_attr_quota_refresh_user.attr,
 202         &gfs2_attr_quota_refresh_group.attr,
 203         NULL,
 204 };
 205
 206 static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
 207                               char *buf)
 208 {
 209         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 210         struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
 211         return a->show ? a->show(sdp, buf) : 0;
 212 }
 213
 214 static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
 215                                const char *buf, size_t len)
 216 {
 217         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 218         struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
 219         return a->store ? a->store(sdp, buf, len) : len;
 220 }
 221
 222 static struct sysfs_ops gfs2_attr_ops = {
 223         .show  = gfs2_attr_show,
 224         .store = gfs2_attr_store,
 225 };
 226
 227 static struct kobj_type gfs2_ktype = {
 228         .default_attrs = gfs2_attrs,
 229         .sysfs_ops     = &gfs2_attr_ops,
 230 };
 231
 232 static struct kset *gfs2_kset;
 233
 234 /*
 235  * display struct lm_lockstruct fields
 236  */
 237
 238 struct lockstruct_attr {
 239         struct attribute attr;
 240         ssize_t (*show)(struct gfs2_sbd *, char *);
 241 };
 242
 243 #define LOCKSTRUCT_ATTR(name, fmt)                                          \
 244 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                 \
 245 {                                                                           \
 246         return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_lockstruct.ls_##name); \
 247 }                                                                           \
 248 static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
 249
 250 LOCKSTRUCT_ATTR(jid,      "%u\n");
 251 LOCKSTRUCT_ATTR(first,    "%u\n");
 252
 253 static struct attribute *lockstruct_attrs[] = {
 254         &lockstruct_attr_jid.attr,
 255         &lockstruct_attr_first.attr,
 256         NULL,
 257 };
 258
 259 /*
 260  * lock_module. Originally from lock_dlm
 261  */
 262
 263 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
 264 {
 265         const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
 266         return sprintf(buf, "%s\n", ops->lm_proto_name);
 267 }
 268
 269 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
 270 {
 271         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 272         ssize_t ret;
 273         int val = 0;
 274
 275         if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
 276                 val = 1;
 277         ret = sprintf(buf, "%d\n", val);
 278         return ret;
 279 }
 280
 281 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 282 {
 283         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 284         ssize_t ret = len;
 285         int val;
 286
 287         val = simple_strtol(buf, NULL, 0);
 288
 289         if (val == 1)
 290                 set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
 291         else if (val == 0) {
 292                 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
 293                 smp_mb__after_clear_bit();
 294                 gfs2_glock_thaw(sdp);
 295         } else {
 296                 ret = -EINVAL;
 297         }
 298         return ret;
 299 }
 300
 301 static ssize_t lkid_show(struct gfs2_sbd *sdp, char *buf)
 302 {
 303         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 304         return sprintf(buf, "%u\n", ls->ls_id);
 305 }
 306
 307 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
 308 {
 309         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 310         return sprintf(buf, "%d\n", ls->ls_first);
 311 }
 312
 313 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
 314 {
 315         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 316         return sprintf(buf, "%d\n", ls->ls_first_done);
 317 }
 318
 319 static ssize_t recover_show(struct gfs2_sbd *sdp, char *buf)
 320 {
 321         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 322         return sprintf(buf, "%d\n", ls->ls_recover_jid);
 323 }
 324
 325 static void gfs2_jdesc_make_dirty(struct gfs2_sbd *sdp, unsigned int jid)
 326 {
 327         struct gfs2_jdesc *jd;
 328
 329         spin_lock(&sdp->sd_jindex_spin);
 330         list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
 331                 if (jd->jd_jid != jid)
 332                         continue;
 333                 jd->jd_dirty = 1;
 334                 break;
 335         }
 336         spin_unlock(&sdp->sd_jindex_spin);
 337 }
 338
 339 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 340 {
 341         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 342         ls->ls_recover_jid = simple_strtol(buf, NULL, 0);
 343         gfs2_jdesc_make_dirty(sdp, ls->ls_recover_jid);
 344         if (sdp->sd_recoverd_process)
 345                 wake_up_process(sdp->sd_recoverd_process);
 346         return len;
 347 }
 348
 349 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
 350 {
 351         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 352         return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
 353 }
 354
 355 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
 356 {
 357         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 358         return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
 359 }
 360
 361 struct gdlm_attr {
 362         struct attribute attr;
 363         ssize_t (*show)(struct gfs2_sbd *sdp, char *);
 364         ssize_t (*store)(struct gfs2_sbd *sdp, const char *, size_t);
 365 };
 366
 367 #define GDLM_ATTR(_name,_mode,_show,_store) \
 368 static struct gdlm_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
 369
 370 GDLM_ATTR(proto_name,     0444, proto_name_show,     NULL);
 371 GDLM_ATTR(block,          0644, block_show,          block_store);
 372 GDLM_ATTR(withdraw,       0644, withdraw_show,       withdraw_store);
 373 GDLM_ATTR(id,             0444, lkid_show,           NULL);
 374 GDLM_ATTR(first,          0444, lkfirst_show,        NULL);
 375 GDLM_ATTR(first_done,     0444, first_done_show,     NULL);
 376 GDLM_ATTR(recover,        0644, recover_show,        recover_store);
 377 GDLM_ATTR(recover_done,   0444, recover_done_show,   NULL);
 378 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
 379
 380 static struct attribute *lock_module_attrs[] = {
 381         &gdlm_attr_proto_name.attr,
 382         &gdlm_attr_block.attr,
 383         &gdlm_attr_withdraw.attr,
 384         &gdlm_attr_id.attr,
 385         &lockstruct_attr_jid.attr,
 386         &gdlm_attr_first.attr,
 387         &gdlm_attr_first_done.attr,
 388         &gdlm_attr_recover.attr,
 389         &gdlm_attr_recover_done.attr,
 390         &gdlm_attr_recover_status.attr,
 391         NULL,
 392 };
 393
 394 /*
 395  * display struct gfs2_args fields
 396  */
 397
 398 struct args_attr {
 399         struct attribute attr;
 400         ssize_t (*show)(struct gfs2_sbd *, char *);
 401 };
 402
 403 #define ARGS_ATTR(name, fmt)                                                \
 404 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                 \
 405 {                                                                           \
 406         return snprintf(buf, PAGE_SIZE, fmt, sdp->sd_args.ar_##name);       \
 407 }                                                                           \
 408 static struct args_attr args_attr_##name = __ATTR_RO(name)
 409
 410 ARGS_ATTR(lockproto,       "%s\n");
 411 ARGS_ATTR(locktable,       "%s\n");
 412 ARGS_ATTR(hostdata,        "%s\n");
 413 ARGS_ATTR(spectator,       "%d\n");
 414 ARGS_ATTR(ignore_local_fs, "%d\n");
 415 ARGS_ATTR(localcaching,    "%d\n");
 416 ARGS_ATTR(localflocks,     "%d\n");
 417 ARGS_ATTR(debug,           "%d\n");
 418 ARGS_ATTR(upgrade,         "%d\n");
 419 ARGS_ATTR(posix_acl,       "%d\n");
 420 ARGS_ATTR(quota,           "%u\n");
 421 ARGS_ATTR(suiddir,         "%d\n");
 422 ARGS_ATTR(data,            "%d\n");
 423
 424 static struct attribute *args_attrs[] = {
 425         &args_attr_lockproto.attr,
 426         &args_attr_locktable.attr,
 427         &args_attr_hostdata.attr,
 428         &args_attr_spectator.attr,
 429         &args_attr_ignore_local_fs.attr,
 430         &args_attr_localcaching.attr,
 431         &args_attr_localflocks.attr,
 432         &args_attr_debug.attr,
 433         &args_attr_upgrade.attr,
 434         &args_attr_posix_acl.attr,
 435         &args_attr_quota.attr,
 436         &args_attr_suiddir.attr,
 437         &args_attr_data.attr,
 438         NULL,
 439 };
 440
 441 /*
 442  * get and set struct gfs2_tune fields
 443  */
 444
 445 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
 446 {
 447         return snprintf(buf, PAGE_SIZE, "%u %u\n",
 448                         sdp->sd_tune.gt_quota_scale_num,
 449                         sdp->sd_tune.gt_quota_scale_den);
 450 }
 451
 452 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
 453                                  size_t len)
 454 {
 455         struct gfs2_tune *gt = &sdp->sd_tune;
 456         unsigned int x, y;
 457
 458         if (!capable(CAP_SYS_ADMIN))
 459                 return -EACCES;
 460
 461         if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
 462                 return -EINVAL;
 463
 464         spin_lock(&gt->gt_spin);
 465         gt->gt_quota_scale_num = x;
 466         gt->gt_quota_scale_den = y;
 467         spin_unlock(&gt->gt_spin);
 468         return len;
 469 }
 470
 471 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
 472                         int check_zero, const char *buf, size_t len)
 473 {
 474         struct gfs2_tune *gt = &sdp->sd_tune;
 475         unsigned int x;
 476
 477         if (!capable(CAP_SYS_ADMIN))
 478                 return -EACCES;
 479
 480         x = simple_strtoul(buf, NULL, 0);
 481
 482         if (check_zero && !x)
 483                 return -EINVAL;
 484
 485         spin_lock(&gt->gt_spin);
 486         *field = x;
 487         spin_unlock(&gt->gt_spin);
 488         return len;
 489 }
 490
 491 struct tune_attr {
 492         struct attribute attr;
 493         ssize_t (*show)(struct gfs2_sbd *, char *);
 494         ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
 495 };
 496
 497 #define TUNE_ATTR_3(name, show, store)                                        \
 498 static struct tune_attr tune_attr_##name = __ATTR(name, 0644, show, store)
 499
 500 #define TUNE_ATTR_2(name, store)                                              \
 501 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                   \
 502 {                                                                             \
 503         return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name);      \
 504 }                                                                             \
 505 TUNE_ATTR_3(name, name##_show, store)
 506
 507 #define TUNE_ATTR(name, check_zero)                                           \
 508 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
 509 {                                                                             \
 510         return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len);  \
 511 }                                                                             \
 512 TUNE_ATTR_2(name, name##_store)
 513
 514 #define TUNE_ATTR_DAEMON(name, process)                                       \
 515 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
 516 {                                                                             \
 517         ssize_t r = tune_set(sdp, &sdp->sd_tune.gt_##name, 1, buf, len);      \
 518         wake_up_process(sdp->sd_##process);                                   \
 519         return r;                                                             \
 520 }                                                                             \
 521 TUNE_ATTR_2(name, name##_store)
 522
 523 TUNE_ATTR(incore_log_blocks, 0);
 524 TUNE_ATTR(log_flush_secs, 0);
 525 TUNE_ATTR(quota_warn_period, 0);
 526 TUNE_ATTR(quota_quantum, 0);
 527 TUNE_ATTR(max_readahead, 0);
 528 TUNE_ATTR(complain_secs, 0);
 529 TUNE_ATTR(statfs_slow, 0);
 530 TUNE_ATTR(new_files_jdata, 0);
 531 TUNE_ATTR(quota_simul_sync, 1);
 532 TUNE_ATTR(stall_secs, 1);
 533 TUNE_ATTR(statfs_quantum, 1);
 534 TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
 535 TUNE_ATTR_DAEMON(logd_secs, logd_process);
 536 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
 537
 538 static struct attribute *tune_attrs[] = {
 539         &tune_attr_incore_log_blocks.attr,
 540         &tune_attr_log_flush_secs.attr,
 541         &tune_attr_quota_warn_period.attr,
 542         &tune_attr_quota_quantum.attr,
 543         &tune_attr_max_readahead.attr,
 544         &tune_attr_complain_secs.attr,
 545         &tune_attr_statfs_slow.attr,
 546         &tune_attr_quota_simul_sync.attr,
 547         &tune_attr_stall_secs.attr,
 548         &tune_attr_statfs_quantum.attr,
 549         &tune_attr_recoverd_secs.attr,
 550         &tune_attr_logd_secs.attr,
 551         &tune_attr_quota_scale.attr,
 552         &tune_attr_new_files_jdata.attr,
 553         NULL,
 554 };
 555
 556 static struct attribute_group lockstruct_group = {
 557         .name = "lockstruct",
 558         .attrs = lockstruct_attrs,
 559 };
 560
 561 static struct attribute_group args_group = {
 562         .name = "args",
 563         .attrs = args_attrs,
 564 };
 565
 566 static struct attribute_group tune_group = {
 567         .name = "tune",
 568         .attrs = tune_attrs,
 569 };
 570
 571 static struct attribute_group lock_module_group = {
 572         .name = "lock_module",
 573         .attrs = lock_module_attrs,
 574 };
 575
 576 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
 577 {
 578         int error;
 579
 580         sdp->sd_kobj.kset = gfs2_kset;
 581         error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
 582                                      "%s", sdp->sd_table_name);
 583         if (error)
 584                 goto fail;
 585
 586         error = sysfs_create_group(&sdp->sd_kobj, &lockstruct_group);
 587         if (error)
 588                 goto fail_reg;
 589
 590         error = sysfs_create_group(&sdp->sd_kobj, &args_group);
 591         if (error)
 592                 goto fail_lockstruct;
 593
 594         error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
 595         if (error)
 596                 goto fail_args;
 597
 598         error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
 599         if (error)
 600                 goto fail_tune;
 601
 602         kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
 603         return 0;
 604
 605 fail_tune:
 606         sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 607 fail_args:
 608         sysfs_remove_group(&sdp->sd_kobj, &args_group);
 609 fail_lockstruct:
 610         sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
 611 fail_reg:
 612         kobject_put(&sdp->sd_kobj);
 613 fail:
 614         fs_err(sdp, "error %d adding sysfs files", error);
 615         return error;
 616 }
 617
 618 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
 619 {
 620         sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 621         sysfs_remove_group(&sdp->sd_kobj, &args_group);
 622         sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
 623         sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
 624         kobject_put(&sdp->sd_kobj);
 625 }
 626
 627
 628 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
 629                        struct kobj_uevent_env *env)
 630 {
 631         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 632         const u8 *uuid = sdp->sd_sb.sb_uuid;
 633
 634         add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
 635         add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
 636         if (gfs2_uuid_valid(uuid)) {
 637                 add_uevent_var(env, "UUID=%02X%02X%02X%02X-%02X%02X-%02X%02X-"
 638                                "%02X%02X-%02X%02X%02X%02X%02X%02X",
 639                                uuid[0], uuid[1], uuid[2], uuid[3], uuid[4],
 640                                uuid[5], uuid[6], uuid[7], uuid[8], uuid[9],
 641                                uuid[10], uuid[11], uuid[12], uuid[13],
 642                                uuid[14], uuid[15]);
 643         }
 644         return 0;
 645 }
 646
 647 static struct kset_uevent_ops gfs2_uevent_ops = {
 648         .uevent = gfs2_uevent,
 649 };
 650
 651
 652 int gfs2_sys_init(void)
 653 {
 654         gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
 655         if (!gfs2_kset)
 656                 return -ENOMEM;
 657         return 0;
 658 }
 659
 660 void gfs2_sys_uninit(void)
 661 {
 662         kset_unregister(gfs2_kset);
 663 }
 664