Pileus Git - ~andy/linux/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/spinlock.h>
  12 #include <linux/completion.h>
  13 #include <linux/buffer_head.h>
  14 #include <linux/module.h>
  15 #include <linux/kobject.h>
  16 #include <asm/uaccess.h>
  17 #include <linux/gfs2_ondisk.h>
  18 #include <linux/genhd.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 #include "glops.h"
  28 #include "recovery.h"
  29
  30 struct gfs2_attr {
  31         struct attribute attr;
  32         ssize_t (*show)(struct gfs2_sbd *, char *);
  33         ssize_t (*store)(struct gfs2_sbd *, const char *, size_t);
  34 };
  35
  36 static ssize_t gfs2_attr_show(struct kobject *kobj, struct attribute *attr,
  37                               char *buf)
  38 {
  39         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
  40         struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
  41         return a->show ? a->show(sdp, buf) : 0;
  42 }
  43
  44 static ssize_t gfs2_attr_store(struct kobject *kobj, struct attribute *attr,
  45                                const char *buf, size_t len)
  46 {
  47         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
  48         struct gfs2_attr *a = container_of(attr, struct gfs2_attr, attr);
  49         return a->store ? a->store(sdp, buf, len) : len;
  50 }
  51
  52 static const struct sysfs_ops gfs2_attr_ops = {
  53         .show  = gfs2_attr_show,
  54         .store = gfs2_attr_store,
  55 };
  56
  57
  58 static struct kset *gfs2_kset;
  59
  60 static ssize_t id_show(struct gfs2_sbd *sdp, char *buf)
  61 {
  62         return snprintf(buf, PAGE_SIZE, "%u:%u\n",
  63                         MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev));
  64 }
  65
  66 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf)
  67 {
  68         return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname);
  69 }
  70
  71 static int gfs2_uuid_valid(const u8 *uuid)
  72 {
  73         int i;
  74
  75         for (i = 0; i < 16; i++) {
  76                 if (uuid[i])
  77                         return 1;
  78         }
  79         return 0;
  80 }
  81
  82 static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
  83 {
  84         struct super_block *s = sdp->sd_vfs;
  85         const u8 *uuid = s->s_uuid;
  86         buf[0] = '\0';
  87         if (!gfs2_uuid_valid(uuid))
  88                 return 0;
  89         return snprintf(buf, PAGE_SIZE, "%pUB\n", uuid);
  90 }
  91
  92 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
  93 {
  94         struct super_block *sb = sdp->sd_vfs;
  95         int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
  96
  97         return snprintf(buf, PAGE_SIZE, "%u\n", frozen);
  98 }
  99
 100 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 101 {
 102         int error;
 103         int n = simple_strtol(buf, NULL, 0);
 104
 105         if (!capable(CAP_SYS_ADMIN))
 106                 return -EACCES;
 107
 108         switch (n) {
 109         case 0:
 110                 error = thaw_super(sdp->sd_vfs);
 111                 break;
 112         case 1:
 113                 error = freeze_super(sdp->sd_vfs);
 114                 break;
 115         default:
 116                 return -EINVAL;
 117         }
 118
 119         if (error) {
 120                 fs_warn(sdp, "freeze %d error %d", n, error);
 121                 return error;
 122         }
 123
 124         return len;
 125 }
 126
 127 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
 128 {
 129         unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
 130         return snprintf(buf, PAGE_SIZE, "%u\n", b);
 131 }
 132
 133 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 134 {
 135         if (!capable(CAP_SYS_ADMIN))
 136                 return -EACCES;
 137
 138         if (simple_strtol(buf, NULL, 0) != 1)
 139                 return -EINVAL;
 140
 141         gfs2_lm_withdraw(sdp,
 142                 "GFS2: fsid=%s: withdrawing from cluster at user's request\n",
 143                 sdp->sd_fsname);
 144         return len;
 145 }
 146
 147 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
 148                                  size_t len)
 149 {
 150         if (!capable(CAP_SYS_ADMIN))
 151                 return -EACCES;
 152
 153         if (simple_strtol(buf, NULL, 0) != 1)
 154                 return -EINVAL;
 155
 156         gfs2_statfs_sync(sdp->sd_vfs, 0);
 157         return len;
 158 }
 159
 160 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
 161                                 size_t len)
 162 {
 163         if (!capable(CAP_SYS_ADMIN))
 164                 return -EACCES;
 165
 166         if (simple_strtol(buf, NULL, 0) != 1)
 167                 return -EINVAL;
 168
 169         gfs2_quota_sync(sdp->sd_vfs, 0);
 170         return len;
 171 }
 172
 173 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
 174                                         size_t len)
 175 {
 176         int error;
 177         u32 id;
 178
 179         if (!capable(CAP_SYS_ADMIN))
 180                 return -EACCES;
 181
 182         id = simple_strtoul(buf, NULL, 0);
 183
 184         error = gfs2_quota_refresh(sdp, 1, id);
 185         return error ? error : len;
 186 }
 187
 188 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
 189                                          size_t len)
 190 {
 191         int error;
 192         u32 id;
 193
 194         if (!capable(CAP_SYS_ADMIN))
 195                 return -EACCES;
 196
 197         id = simple_strtoul(buf, NULL, 0);
 198
 199         error = gfs2_quota_refresh(sdp, 0, id);
 200         return error ? error : len;
 201 }
 202
 203 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 204 {
 205         struct gfs2_glock *gl;
 206         const struct gfs2_glock_operations *glops;
 207         unsigned int glmode;
 208         unsigned int gltype;
 209         unsigned long long glnum;
 210         char mode[16];
 211         int rv;
 212
 213         if (!capable(CAP_SYS_ADMIN))
 214                 return -EACCES;
 215
 216         rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
 217                     mode);
 218         if (rv != 3)
 219                 return -EINVAL;
 220
 221         if (strcmp(mode, "EX") == 0)
 222                 glmode = LM_ST_UNLOCKED;
 223         else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
 224                 glmode = LM_ST_DEFERRED;
 225         else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
 226                 glmode = LM_ST_SHARED;
 227         else
 228                 return -EINVAL;
 229
 230         if (gltype > LM_TYPE_JOURNAL)
 231                 return -EINVAL;
 232         if (gltype == LM_TYPE_NONDISK && glnum == GFS2_TRANS_LOCK)
 233                 glops = &gfs2_trans_glops;
 234         else
 235                 glops = gfs2_glops_list[gltype];
 236         if (glops == NULL)
 237                 return -EINVAL;
 238         if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
 239                 fs_info(sdp, "demote interface used\n");
 240         rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
 241         if (rv)
 242                 return rv;
 243         gfs2_glock_cb(gl, glmode);
 244         gfs2_glock_put(gl);
 245         return len;
 246 }
 247
 248
 249 #define GFS2_ATTR(name, mode, show, store) \
 250 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
 251
 252 GFS2_ATTR(id,                  0444, id_show,       NULL);
 253 GFS2_ATTR(fsname,              0444, fsname_show,   NULL);
 254 GFS2_ATTR(uuid,                0444, uuid_show,     NULL);
 255 GFS2_ATTR(freeze,              0644, freeze_show,   freeze_store);
 256 GFS2_ATTR(withdraw,            0644, withdraw_show, withdraw_store);
 257 GFS2_ATTR(statfs_sync,         0200, NULL,          statfs_sync_store);
 258 GFS2_ATTR(quota_sync,          0200, NULL,          quota_sync_store);
 259 GFS2_ATTR(quota_refresh_user,  0200, NULL,          quota_refresh_user_store);
 260 GFS2_ATTR(quota_refresh_group, 0200, NULL,          quota_refresh_group_store);
 261 GFS2_ATTR(demote_rq,           0200, NULL,          demote_rq_store);
 262
 263 static struct attribute *gfs2_attrs[] = {
 264         &gfs2_attr_id.attr,
 265         &gfs2_attr_fsname.attr,
 266         &gfs2_attr_uuid.attr,
 267         &gfs2_attr_freeze.attr,
 268         &gfs2_attr_withdraw.attr,
 269         &gfs2_attr_statfs_sync.attr,
 270         &gfs2_attr_quota_sync.attr,
 271         &gfs2_attr_quota_refresh_user.attr,
 272         &gfs2_attr_quota_refresh_group.attr,
 273         &gfs2_attr_demote_rq.attr,
 274         NULL,
 275 };
 276
 277 static void gfs2_sbd_release(struct kobject *kobj)
 278 {
 279         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 280
 281         kfree(sdp);
 282 }
 283
 284 static struct kobj_type gfs2_ktype = {
 285         .release = gfs2_sbd_release,
 286         .default_attrs = gfs2_attrs,
 287         .sysfs_ops     = &gfs2_attr_ops,
 288 };
 289
 290
 291 /*
 292  * lock_module. Originally from lock_dlm
 293  */
 294
 295 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
 296 {
 297         const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
 298         return sprintf(buf, "%s\n", ops->lm_proto_name);
 299 }
 300
 301 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
 302 {
 303         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 304         ssize_t ret;
 305         int val = 0;
 306
 307         if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
 308                 val = 1;
 309         ret = sprintf(buf, "%d\n", val);
 310         return ret;
 311 }
 312
 313 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 314 {
 315         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 316         ssize_t ret = len;
 317         int val;
 318
 319         val = simple_strtol(buf, NULL, 0);
 320
 321         if (val == 1)
 322                 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
 323         else if (val == 0) {
 324                 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
 325                 smp_mb__after_clear_bit();
 326                 gfs2_glock_thaw(sdp);
 327         } else {
 328                 ret = -EINVAL;
 329         }
 330         return ret;
 331 }
 332
 333 static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
 334 {
 335         int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
 336
 337         return sprintf(buf, "%d\n", val);
 338 }
 339
 340 static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 341 {
 342         ssize_t ret = len;
 343         int val;
 344
 345         val = simple_strtol(buf, NULL, 0);
 346
 347         if ((val == 1) &&
 348             !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
 349                 complete(&sdp->sd_wdack);
 350         else
 351                 ret = -EINVAL;
 352         return ret;
 353 }
 354
 355 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
 356 {
 357         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 358         return sprintf(buf, "%d\n", ls->ls_first);
 359 }
 360
 361 static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 362 {
 363         unsigned first;
 364         int rv;
 365
 366         rv = sscanf(buf, "%u", &first);
 367         if (rv != 1 || first > 1)
 368                 return -EINVAL;
 369         rv = wait_for_completion_killable(&sdp->sd_locking_init);
 370         if (rv)
 371                 return rv;
 372         spin_lock(&sdp->sd_jindex_spin);
 373         rv = -EBUSY;
 374         if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
 375                 goto out;
 376         rv = -EINVAL;
 377         if (sdp->sd_args.ar_spectator)
 378                 goto out;
 379         if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
 380                 goto out;
 381         sdp->sd_lockstruct.ls_first = first;
 382         rv = 0;
 383 out:
 384         spin_unlock(&sdp->sd_jindex_spin);
 385         return rv ? rv : len;
 386 }
 387
 388 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
 389 {
 390         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 391         return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
 392 }
 393
 394 int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
 395 {
 396         struct gfs2_jdesc *jd;
 397         int rv;
 398
 399         spin_lock(&sdp->sd_jindex_spin);
 400         rv = -EBUSY;
 401         if (sdp->sd_jdesc->jd_jid == jid)
 402                 goto out;
 403         rv = -ENOENT;
 404         list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
 405                 if (jd->jd_jid != jid)
 406                         continue;
 407                 rv = gfs2_recover_journal(jd, false);
 408                 break;
 409         }
 410 out:
 411         spin_unlock(&sdp->sd_jindex_spin);
 412         return rv;
 413 }
 414
 415 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 416 {
 417         unsigned jid;
 418         int rv;
 419
 420         rv = sscanf(buf, "%u", &jid);
 421         if (rv != 1)
 422                 return -EINVAL;
 423
 424         if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
 425                 rv = -ESHUTDOWN;
 426                 goto out;
 427         }
 428
 429         rv = gfs2_recover_set(sdp, jid);
 430 out:
 431         return rv ? rv : len;
 432 }
 433
 434 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
 435 {
 436         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 437         return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
 438 }
 439
 440 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
 441 {
 442         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 443         return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
 444 }
 445
 446 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
 447 {
 448         return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
 449 }
 450
 451 static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 452 {
 453         int jid;
 454         int rv;
 455
 456         rv = sscanf(buf, "%d", &jid);
 457         if (rv != 1)
 458                 return -EINVAL;
 459         rv = wait_for_completion_killable(&sdp->sd_locking_init);
 460         if (rv)
 461                 return rv;
 462         spin_lock(&sdp->sd_jindex_spin);
 463         rv = -EINVAL;
 464         if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
 465                 goto out;
 466         rv = -EBUSY;
 467         if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
 468                 goto out;
 469         rv = 0;
 470         if (sdp->sd_args.ar_spectator && jid > 0)
 471                 rv = jid = -EINVAL;
 472         sdp->sd_lockstruct.ls_jid = jid;
 473         clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
 474         smp_mb__after_clear_bit();
 475         wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
 476 out:
 477         spin_unlock(&sdp->sd_jindex_spin);
 478         return rv ? rv : len;
 479 }
 480
 481 #define GDLM_ATTR(_name,_mode,_show,_store) \
 482 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
 483
 484 GDLM_ATTR(proto_name,           0444, proto_name_show,          NULL);
 485 GDLM_ATTR(block,                0644, block_show,               block_store);
 486 GDLM_ATTR(withdraw,             0644, wdack_show,               wdack_store);
 487 GDLM_ATTR(jid,                  0644, jid_show,                 jid_store);
 488 GDLM_ATTR(first,                0644, lkfirst_show,             lkfirst_store);
 489 GDLM_ATTR(first_done,           0444, first_done_show,          NULL);
 490 GDLM_ATTR(recover,              0600, NULL,                     recover_store);
 491 GDLM_ATTR(recover_done,         0444, recover_done_show,        NULL);
 492 GDLM_ATTR(recover_status,       0444, recover_status_show,      NULL);
 493
 494 static struct attribute *lock_module_attrs[] = {
 495         &gdlm_attr_proto_name.attr,
 496         &gdlm_attr_block.attr,
 497         &gdlm_attr_withdraw.attr,
 498         &gdlm_attr_jid.attr,
 499         &gdlm_attr_first.attr,
 500         &gdlm_attr_first_done.attr,
 501         &gdlm_attr_recover.attr,
 502         &gdlm_attr_recover_done.attr,
 503         &gdlm_attr_recover_status.attr,
 504         NULL,
 505 };
 506
 507 /*
 508  * get and set struct gfs2_tune fields
 509  */
 510
 511 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
 512 {
 513         return snprintf(buf, PAGE_SIZE, "%u %u\n",
 514                         sdp->sd_tune.gt_quota_scale_num,
 515                         sdp->sd_tune.gt_quota_scale_den);
 516 }
 517
 518 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
 519                                  size_t len)
 520 {
 521         struct gfs2_tune *gt = &sdp->sd_tune;
 522         unsigned int x, y;
 523
 524         if (!capable(CAP_SYS_ADMIN))
 525                 return -EACCES;
 526
 527         if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
 528                 return -EINVAL;
 529
 530         spin_lock(&gt->gt_spin);
 531         gt->gt_quota_scale_num = x;
 532         gt->gt_quota_scale_den = y;
 533         spin_unlock(&gt->gt_spin);
 534         return len;
 535 }
 536
 537 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
 538                         int check_zero, const char *buf, size_t len)
 539 {
 540         struct gfs2_tune *gt = &sdp->sd_tune;
 541         unsigned int x;
 542
 543         if (!capable(CAP_SYS_ADMIN))
 544                 return -EACCES;
 545
 546         x = simple_strtoul(buf, NULL, 0);
 547
 548         if (check_zero && !x)
 549                 return -EINVAL;
 550
 551         spin_lock(&gt->gt_spin);
 552         *field = x;
 553         spin_unlock(&gt->gt_spin);
 554         return len;
 555 }
 556
 557 #define TUNE_ATTR_3(name, show, store)                                        \
 558 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
 559
 560 #define TUNE_ATTR_2(name, store)                                              \
 561 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                   \
 562 {                                                                             \
 563         return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name);      \
 564 }                                                                             \
 565 TUNE_ATTR_3(name, name##_show, store)
 566
 567 #define TUNE_ATTR(name, check_zero)                                           \
 568 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
 569 {                                                                             \
 570         return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len);  \
 571 }                                                                             \
 572 TUNE_ATTR_2(name, name##_store)
 573
 574 TUNE_ATTR(quota_warn_period, 0);
 575 TUNE_ATTR(quota_quantum, 0);
 576 TUNE_ATTR(max_readahead, 0);
 577 TUNE_ATTR(complain_secs, 0);
 578 TUNE_ATTR(statfs_slow, 0);
 579 TUNE_ATTR(new_files_jdata, 0);
 580 TUNE_ATTR(quota_simul_sync, 1);
 581 TUNE_ATTR(statfs_quantum, 1);
 582 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
 583
 584 static struct attribute *tune_attrs[] = {
 585         &tune_attr_quota_warn_period.attr,
 586         &tune_attr_quota_quantum.attr,
 587         &tune_attr_max_readahead.attr,
 588         &tune_attr_complain_secs.attr,
 589         &tune_attr_statfs_slow.attr,
 590         &tune_attr_quota_simul_sync.attr,
 591         &tune_attr_statfs_quantum.attr,
 592         &tune_attr_quota_scale.attr,
 593         &tune_attr_new_files_jdata.attr,
 594         NULL,
 595 };
 596
 597 static struct attribute_group tune_group = {
 598         .name = "tune",
 599         .attrs = tune_attrs,
 600 };
 601
 602 static struct attribute_group lock_module_group = {
 603         .name = "lock_module",
 604         .attrs = lock_module_attrs,
 605 };
 606
 607 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
 608 {
 609         struct super_block *sb = sdp->sd_vfs;
 610         int error;
 611         char ro[20];
 612         char spectator[20];
 613         char *envp[] = { ro, spectator, NULL };
 614         int sysfs_frees_sdp = 0;
 615
 616         sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
 617         sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
 618
 619         sdp->sd_kobj.kset = gfs2_kset;
 620         error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
 621                                      "%s", sdp->sd_table_name);
 622         if (error)
 623                 goto fail_reg;
 624
 625         sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling
 626                                 function gfs2_sbd_release. */
 627         error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
 628         if (error)
 629                 goto fail_reg;
 630
 631         error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
 632         if (error)
 633                 goto fail_tune;
 634
 635         error = sysfs_create_link(&sdp->sd_kobj,
 636                                   &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
 637                                   "device");
 638         if (error)
 639                 goto fail_lock_module;
 640
 641         kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
 642         return 0;
 643
 644 fail_lock_module:
 645         sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
 646 fail_tune:
 647         sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 648 fail_reg:
 649         free_percpu(sdp->sd_lkstats);
 650         fs_err(sdp, "error %d adding sysfs files", error);
 651         if (sysfs_frees_sdp)
 652                 kobject_put(&sdp->sd_kobj);
 653         else
 654                 kfree(sdp);
 655         sb->s_fs_info = NULL;
 656         return error;
 657 }
 658
 659 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
 660 {
 661         sysfs_remove_link(&sdp->sd_kobj, "device");
 662         sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 663         sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
 664         kobject_put(&sdp->sd_kobj);
 665 }
 666
 667 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
 668                        struct kobj_uevent_env *env)
 669 {
 670         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 671         struct super_block *s = sdp->sd_vfs;
 672         const u8 *uuid = s->s_uuid;
 673
 674         add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
 675         add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
 676         if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
 677                 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
 678         if (gfs2_uuid_valid(uuid))
 679                 add_uevent_var(env, "UUID=%pUB", uuid);
 680         return 0;
 681 }
 682
 683 static const struct kset_uevent_ops gfs2_uevent_ops = {
 684         .uevent = gfs2_uevent,
 685 };
 686
 687 int gfs2_sys_init(void)
 688 {
 689         gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
 690         if (!gfs2_kset)
 691                 return -ENOMEM;
 692         return 0;
 693 }
 694
 695 void gfs2_sys_uninit(void)
 696 {
 697         kset_unregister(gfs2_kset);
 698 }
 699