fs/gfs2/sys.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   5  */
   6
   7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   8
   9 #include <linux/sched.h>
  10 #include <linux/cred.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 <linux/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 ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf)
  72 {
  73         struct super_block *s = sdp->sd_vfs;
  74
  75         buf[0] = '\0';
  76         if (uuid_is_null(&s->s_uuid))
  77                 return 0;
  78         return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid);
  79 }
  80
  81 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf)
  82 {
  83         struct super_block *sb = sdp->sd_vfs;
  84         int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1;
  85
  86         return snprintf(buf, PAGE_SIZE, "%d\n", frozen);
  87 }
  88
  89 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
  90 {
  91         int error, n;
  92
  93         error = kstrtoint(buf, 0, &n);
  94         if (error)
  95                 return error;
  96
  97         if (!capable(CAP_SYS_ADMIN))
  98                 return -EPERM;
  99
 100         switch (n) {
 101         case 0:
 102                 error = thaw_super(sdp->sd_vfs);
 103                 break;
 104         case 1:
 105                 error = freeze_super(sdp->sd_vfs);
 106                 break;
 107         default:
 108                 return -EINVAL;
 109         }
 110
 111         if (error) {
 112                 fs_warn(sdp, "freeze %d error %d\n", n, error);
 113                 return error;
 114         }
 115
 116         return len;
 117 }
 118
 119 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
 120 {
 121         unsigned int b = test_bit(SDF_WITHDRAWN, &sdp->sd_flags);
 122         return snprintf(buf, PAGE_SIZE, "%u\n", b);
 123 }
 124
 125 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 126 {
 127         int error, val;
 128
 129         if (!capable(CAP_SYS_ADMIN))
 130                 return -EPERM;
 131
 132         error = kstrtoint(buf, 0, &val);
 133         if (error)
 134                 return error;
 135
 136         if (val != 1)
 137                 return -EINVAL;
 138
 139         gfs2_lm_withdraw(sdp, "withdrawing from cluster at user's request\n");
 140
 141         return len;
 142 }
 143
 144 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
 145                                  size_t len)
 146 {
 147         int error, val;
 148
 149         if (!capable(CAP_SYS_ADMIN))
 150                 return -EPERM;
 151
 152         error = kstrtoint(buf, 0, &val);
 153         if (error)
 154                 return error;
 155
 156         if (val != 1)
 157                 return -EINVAL;
 158
 159         gfs2_statfs_sync(sdp->sd_vfs, 0);
 160         return len;
 161 }
 162
 163 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
 164                                 size_t len)
 165 {
 166         int error, val;
 167
 168         if (!capable(CAP_SYS_ADMIN))
 169                 return -EPERM;
 170
 171         error = kstrtoint(buf, 0, &val);
 172         if (error)
 173                 return error;
 174
 175         if (val != 1)
 176                 return -EINVAL;
 177
 178         gfs2_quota_sync(sdp->sd_vfs, 0);
 179         return len;
 180 }
 181
 182 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
 183                                         size_t len)
 184 {
 185         struct kqid qid;
 186         int error;
 187         u32 id;
 188
 189         if (!capable(CAP_SYS_ADMIN))
 190                 return -EPERM;
 191
 192         error = kstrtou32(buf, 0, &id);
 193         if (error)
 194                 return error;
 195
 196         qid = make_kqid(current_user_ns(), USRQUOTA, id);
 197         if (!qid_valid(qid))
 198                 return -EINVAL;
 199
 200         error = gfs2_quota_refresh(sdp, qid);
 201         return error ? error : len;
 202 }
 203
 204 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
 205                                          size_t len)
 206 {
 207         struct kqid qid;
 208         int error;
 209         u32 id;
 210
 211         if (!capable(CAP_SYS_ADMIN))
 212                 return -EPERM;
 213
 214         error = kstrtou32(buf, 0, &id);
 215         if (error)
 216                 return error;
 217
 218         qid = make_kqid(current_user_ns(), GRPQUOTA, id);
 219         if (!qid_valid(qid))
 220                 return -EINVAL;
 221
 222         error = gfs2_quota_refresh(sdp, qid);
 223         return error ? error : len;
 224 }
 225
 226 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 227 {
 228         struct gfs2_glock *gl;
 229         const struct gfs2_glock_operations *glops;
 230         unsigned int glmode;
 231         unsigned int gltype;
 232         unsigned long long glnum;
 233         char mode[16];
 234         int rv;
 235
 236         if (!capable(CAP_SYS_ADMIN))
 237                 return -EPERM;
 238
 239         rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
 240                     mode);
 241         if (rv != 3)
 242                 return -EINVAL;
 243
 244         if (strcmp(mode, "EX") == 0)
 245                 glmode = LM_ST_UNLOCKED;
 246         else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
 247                 glmode = LM_ST_DEFERRED;
 248         else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
 249                 glmode = LM_ST_SHARED;
 250         else
 251                 return -EINVAL;
 252
 253         if (gltype > LM_TYPE_JOURNAL)
 254                 return -EINVAL;
 255         if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK)
 256                 glops = &gfs2_freeze_glops;
 257         else
 258                 glops = gfs2_glops_list[gltype];
 259         if (glops == NULL)
 260                 return -EINVAL;
 261         if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
 262                 fs_info(sdp, "demote interface used\n");
 263         rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
 264         if (rv)
 265                 return rv;
 266         gfs2_glock_cb(gl, glmode);
 267         gfs2_glock_put(gl);
 268         return len;
 269 }
 270
 271
 272 #define GFS2_ATTR(name, mode, show, store) \
 273 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
 274
 275 GFS2_ATTR(id,                  0444, id_show,       NULL);
 276 GFS2_ATTR(fsname,              0444, fsname_show,   NULL);
 277 GFS2_ATTR(uuid,                0444, uuid_show,     NULL);
 278 GFS2_ATTR(freeze,              0644, freeze_show,   freeze_store);
 279 GFS2_ATTR(withdraw,            0644, withdraw_show, withdraw_store);
 280 GFS2_ATTR(statfs_sync,         0200, NULL,          statfs_sync_store);
 281 GFS2_ATTR(quota_sync,          0200, NULL,          quota_sync_store);
 282 GFS2_ATTR(quota_refresh_user,  0200, NULL,          quota_refresh_user_store);
 283 GFS2_ATTR(quota_refresh_group, 0200, NULL,          quota_refresh_group_store);
 284 GFS2_ATTR(demote_rq,           0200, NULL,          demote_rq_store);
 285
 286 static struct attribute *gfs2_attrs[] = {
 287         &gfs2_attr_id.attr,
 288         &gfs2_attr_fsname.attr,
 289         &gfs2_attr_uuid.attr,
 290         &gfs2_attr_freeze.attr,
 291         &gfs2_attr_withdraw.attr,
 292         &gfs2_attr_statfs_sync.attr,
 293         &gfs2_attr_quota_sync.attr,
 294         &gfs2_attr_quota_refresh_user.attr,
 295         &gfs2_attr_quota_refresh_group.attr,
 296         &gfs2_attr_demote_rq.attr,
 297         NULL,
 298 };
 299 ATTRIBUTE_GROUPS(gfs2);
 300
 301 static void gfs2_sbd_release(struct kobject *kobj)
 302 {
 303         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 304
 305         complete(&sdp->sd_kobj_unregister);
 306 }
 307
 308 static struct kobj_type gfs2_ktype = {
 309         .release = gfs2_sbd_release,
 310         .default_groups = gfs2_groups,
 311         .sysfs_ops     = &gfs2_attr_ops,
 312 };
 313
 314
 315 /*
 316  * lock_module. Originally from lock_dlm
 317  */
 318
 319 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
 320 {
 321         const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
 322         return sprintf(buf, "%s\n", ops->lm_proto_name);
 323 }
 324
 325 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
 326 {
 327         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 328         ssize_t ret;
 329         int val = 0;
 330
 331         if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
 332                 val = 1;
 333         ret = sprintf(buf, "%d\n", val);
 334         return ret;
 335 }
 336
 337 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 338 {
 339         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 340         int ret, val;
 341
 342         ret = kstrtoint(buf, 0, &val);
 343         if (ret)
 344                 return ret;
 345
 346         if (val == 1)
 347                 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
 348         else if (val == 0) {
 349                 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
 350                 smp_mb__after_atomic();
 351                 gfs2_glock_thaw(sdp);
 352         } else {
 353                 return -EINVAL;
 354         }
 355         return len;
 356 }
 357
 358 static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
 359 {
 360         int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
 361
 362         return sprintf(buf, "%d\n", val);
 363 }
 364
 365 static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 366 {
 367         int ret, val;
 368
 369         ret = kstrtoint(buf, 0, &val);
 370         if (ret)
 371                 return ret;
 372
 373         if ((val == 1) &&
 374             !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
 375                 complete(&sdp->sd_wdack);
 376         else
 377                 return -EINVAL;
 378         return len;
 379 }
 380
 381 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
 382 {
 383         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 384         return sprintf(buf, "%d\n", ls->ls_first);
 385 }
 386
 387 static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 388 {
 389         unsigned first;
 390         int rv;
 391
 392         rv = sscanf(buf, "%u", &first);
 393         if (rv != 1 || first > 1)
 394                 return -EINVAL;
 395         rv = wait_for_completion_killable(&sdp->sd_locking_init);
 396         if (rv)
 397                 return rv;
 398         spin_lock(&sdp->sd_jindex_spin);
 399         rv = -EBUSY;
 400         if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
 401                 goto out;
 402         rv = -EINVAL;
 403         if (sdp->sd_args.ar_spectator)
 404                 goto out;
 405         if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
 406                 goto out;
 407         sdp->sd_lockstruct.ls_first = first;
 408         rv = 0;
 409 out:
 410         spin_unlock(&sdp->sd_jindex_spin);
 411         return rv ? rv : len;
 412 }
 413
 414 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
 415 {
 416         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 417         return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
 418 }
 419
 420 int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
 421 {
 422         struct gfs2_jdesc *jd;
 423         int rv;
 424
 425         /* Wait for our primary journal to be initialized */
 426         wait_for_completion(&sdp->sd_journal_ready);
 427
 428         spin_lock(&sdp->sd_jindex_spin);
 429         rv = -EBUSY;
 430         /**
 431          * If we're a spectator, we use journal0, but it's not really ours.
 432          * So we need to wait for its recovery too. If we skip it we'd never
 433          * queue work to the recovery workqueue, and so its completion would
 434          * never clear the DFL_BLOCK_LOCKS flag, so all our locks would
 435          * permanently stop working.
 436          */
 437         if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator)
 438                 goto out;
 439         rv = -ENOENT;
 440         list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
 441                 if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator)
 442                         continue;
 443                 rv = gfs2_recover_journal(jd, false);
 444                 break;
 445         }
 446 out:
 447         spin_unlock(&sdp->sd_jindex_spin);
 448         return rv;
 449 }
 450
 451 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 452 {
 453         unsigned jid;
 454         int rv;
 455
 456         rv = sscanf(buf, "%u", &jid);
 457         if (rv != 1)
 458                 return -EINVAL;
 459
 460         if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
 461                 rv = -ESHUTDOWN;
 462                 goto out;
 463         }
 464
 465         rv = gfs2_recover_set(sdp, jid);
 466 out:
 467         return rv ? rv : len;
 468 }
 469
 470 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
 471 {
 472         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 473         return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
 474 }
 475
 476 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
 477 {
 478         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 479         return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
 480 }
 481
 482 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
 483 {
 484         return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
 485 }
 486
 487 static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 488 {
 489         int jid;
 490         int rv;
 491
 492         rv = sscanf(buf, "%d", &jid);
 493         if (rv != 1)
 494                 return -EINVAL;
 495         rv = wait_for_completion_killable(&sdp->sd_locking_init);
 496         if (rv)
 497                 return rv;
 498         spin_lock(&sdp->sd_jindex_spin);
 499         rv = -EINVAL;
 500         if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
 501                 goto out;
 502         rv = -EBUSY;
 503         if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
 504                 goto out;
 505         rv = 0;
 506         if (sdp->sd_args.ar_spectator && jid > 0)
 507                 rv = jid = -EINVAL;
 508         sdp->sd_lockstruct.ls_jid = jid;
 509         clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
 510         smp_mb__after_atomic();
 511         wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
 512 out:
 513         spin_unlock(&sdp->sd_jindex_spin);
 514         return rv ? rv : len;
 515 }
 516
 517 #define GDLM_ATTR(_name,_mode,_show,_store) \
 518 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
 519
 520 GDLM_ATTR(proto_name,           0444, proto_name_show,          NULL);
 521 GDLM_ATTR(block,                0644, block_show,               block_store);
 522 GDLM_ATTR(withdraw,             0644, wdack_show,               wdack_store);
 523 GDLM_ATTR(jid,                  0644, jid_show,                 jid_store);
 524 GDLM_ATTR(first,                0644, lkfirst_show,             lkfirst_store);
 525 GDLM_ATTR(first_done,           0444, first_done_show,          NULL);
 526 GDLM_ATTR(recover,              0600, NULL,                     recover_store);
 527 GDLM_ATTR(recover_done,         0444, recover_done_show,        NULL);
 528 GDLM_ATTR(recover_status,       0444, recover_status_show,      NULL);
 529
 530 static struct attribute *lock_module_attrs[] = {
 531         &gdlm_attr_proto_name.attr,
 532         &gdlm_attr_block.attr,
 533         &gdlm_attr_withdraw.attr,
 534         &gdlm_attr_jid.attr,
 535         &gdlm_attr_first.attr,
 536         &gdlm_attr_first_done.attr,
 537         &gdlm_attr_recover.attr,
 538         &gdlm_attr_recover_done.attr,
 539         &gdlm_attr_recover_status.attr,
 540         NULL,
 541 };
 542
 543 /*
 544  * get and set struct gfs2_tune fields
 545  */
 546
 547 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
 548 {
 549         return snprintf(buf, PAGE_SIZE, "%u %u\n",
 550                         sdp->sd_tune.gt_quota_scale_num,
 551                         sdp->sd_tune.gt_quota_scale_den);
 552 }
 553
 554 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
 555                                  size_t len)
 556 {
 557         struct gfs2_tune *gt = &sdp->sd_tune;
 558         unsigned int x, y;
 559
 560         if (!capable(CAP_SYS_ADMIN))
 561                 return -EPERM;
 562
 563         if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
 564                 return -EINVAL;
 565
 566         spin_lock(&gt->gt_spin);
 567         gt->gt_quota_scale_num = x;
 568         gt->gt_quota_scale_den = y;
 569         spin_unlock(&gt->gt_spin);
 570         return len;
 571 }
 572
 573 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
 574                         int check_zero, const char *buf, size_t len)
 575 {
 576         struct gfs2_tune *gt = &sdp->sd_tune;
 577         unsigned int x;
 578         int error;
 579
 580         if (!capable(CAP_SYS_ADMIN))
 581                 return -EPERM;
 582
 583         error = kstrtouint(buf, 0, &x);
 584         if (error)
 585                 return error;
 586
 587         if (check_zero && !x)
 588                 return -EINVAL;
 589
 590         spin_lock(&gt->gt_spin);
 591         *field = x;
 592         spin_unlock(&gt->gt_spin);
 593         return len;
 594 }
 595
 596 #define TUNE_ATTR_3(name, show, store)                                        \
 597 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
 598
 599 #define TUNE_ATTR_2(name, store)                                              \
 600 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                   \
 601 {                                                                             \
 602         return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name);      \
 603 }                                                                             \
 604 TUNE_ATTR_3(name, name##_show, store)
 605
 606 #define TUNE_ATTR(name, check_zero)                                           \
 607 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
 608 {                                                                             \
 609         return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len);  \
 610 }                                                                             \
 611 TUNE_ATTR_2(name, name##_store)
 612
 613 TUNE_ATTR(quota_warn_period, 0);
 614 TUNE_ATTR(quota_quantum, 0);
 615 TUNE_ATTR(max_readahead, 0);
 616 TUNE_ATTR(complain_secs, 0);
 617 TUNE_ATTR(statfs_slow, 0);
 618 TUNE_ATTR(new_files_jdata, 0);
 619 TUNE_ATTR(statfs_quantum, 1);
 620 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
 621
 622 static struct attribute *tune_attrs[] = {
 623         &tune_attr_quota_warn_period.attr,
 624         &tune_attr_quota_quantum.attr,
 625         &tune_attr_max_readahead.attr,
 626         &tune_attr_complain_secs.attr,
 627         &tune_attr_statfs_slow.attr,
 628         &tune_attr_statfs_quantum.attr,
 629         &tune_attr_quota_scale.attr,
 630         &tune_attr_new_files_jdata.attr,
 631         NULL,
 632 };
 633
 634 static const struct attribute_group tune_group = {
 635         .name = "tune",
 636         .attrs = tune_attrs,
 637 };
 638
 639 static const struct attribute_group lock_module_group = {
 640         .name = "lock_module",
 641         .attrs = lock_module_attrs,
 642 };
 643
 644 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
 645 {
 646         struct super_block *sb = sdp->sd_vfs;
 647         int error;
 648         char ro[20];
 649         char spectator[20];
 650         char *envp[] = { ro, spectator, NULL };
 651
 652         sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
 653         sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
 654
 655         init_completion(&sdp->sd_kobj_unregister);
 656         sdp->sd_kobj.kset = gfs2_kset;
 657         error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
 658                                      "%s", sdp->sd_table_name);
 659         if (error)
 660                 goto fail_reg;
 661
 662         error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
 663         if (error)
 664                 goto fail_reg;
 665
 666         error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
 667         if (error)
 668                 goto fail_tune;
 669
 670         error = sysfs_create_link(&sdp->sd_kobj,
 671                                   &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
 672                                   "device");
 673         if (error)
 674                 goto fail_lock_module;
 675
 676         kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
 677         return 0;
 678
 679 fail_lock_module:
 680         sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
 681 fail_tune:
 682         sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 683 fail_reg:
 684         fs_err(sdp, "error %d adding sysfs files\n", error);
 685         kobject_put(&sdp->sd_kobj);
 686         wait_for_completion(&sdp->sd_kobj_unregister);
 687         sb->s_fs_info = NULL;
 688         return error;
 689 }
 690
 691 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
 692 {
 693         sysfs_remove_link(&sdp->sd_kobj, "device");
 694         sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 695         sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
 696         kobject_put(&sdp->sd_kobj);
 697         wait_for_completion(&sdp->sd_kobj_unregister);
 698 }
 699
 700 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
 701                        struct kobj_uevent_env *env)
 702 {
 703         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 704         struct super_block *s = sdp->sd_vfs;
 705
 706         add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
 707         add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
 708         if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
 709                 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
 710         if (!uuid_is_null(&s->s_uuid))
 711                 add_uevent_var(env, "UUID=%pUB", &s->s_uuid);
 712         return 0;
 713 }
 714
 715 static const struct kset_uevent_ops gfs2_uevent_ops = {
 716         .uevent = gfs2_uevent,
 717 };
 718
 719 int gfs2_sys_init(void)
 720 {
 721         gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
 722         if (!gfs2_kset)
 723                 return -ENOMEM;
 724         return 0;
 725 }
 726
 727 void gfs2_sys_uninit(void)
 728 {
 729         kset_unregister(gfs2_kset);
 730 }
 731