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 = gfs2_withdrawn(sdp);
 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(sdp, "withdrawing from cluster at user's request\n");
 140         gfs2_withdraw(sdp);
 141
 142         return len;
 143 }
 144
 145 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
 146                                  size_t len)
 147 {
 148         int error, val;
 149
 150         if (!capable(CAP_SYS_ADMIN))
 151                 return -EPERM;
 152
 153         error = kstrtoint(buf, 0, &val);
 154         if (error)
 155                 return error;
 156
 157         if (val != 1)
 158                 return -EINVAL;
 159
 160         gfs2_statfs_sync(sdp->sd_vfs, 0);
 161         return len;
 162 }
 163
 164 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
 165                                 size_t len)
 166 {
 167         int error, val;
 168
 169         if (!capable(CAP_SYS_ADMIN))
 170                 return -EPERM;
 171
 172         error = kstrtoint(buf, 0, &val);
 173         if (error)
 174                 return error;
 175
 176         if (val != 1)
 177                 return -EINVAL;
 178
 179         gfs2_quota_sync(sdp->sd_vfs, 0);
 180         return len;
 181 }
 182
 183 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
 184                                         size_t len)
 185 {
 186         struct kqid qid;
 187         int error;
 188         u32 id;
 189
 190         if (!capable(CAP_SYS_ADMIN))
 191                 return -EPERM;
 192
 193         error = kstrtou32(buf, 0, &id);
 194         if (error)
 195                 return error;
 196
 197         qid = make_kqid(current_user_ns(), USRQUOTA, id);
 198         if (!qid_valid(qid))
 199                 return -EINVAL;
 200
 201         error = gfs2_quota_refresh(sdp, qid);
 202         return error ? error : len;
 203 }
 204
 205 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
 206                                          size_t len)
 207 {
 208         struct kqid qid;
 209         int error;
 210         u32 id;
 211
 212         if (!capable(CAP_SYS_ADMIN))
 213                 return -EPERM;
 214
 215         error = kstrtou32(buf, 0, &id);
 216         if (error)
 217                 return error;
 218
 219         qid = make_kqid(current_user_ns(), GRPQUOTA, id);
 220         if (!qid_valid(qid))
 221                 return -EINVAL;
 222
 223         error = gfs2_quota_refresh(sdp, qid);
 224         return error ? error : len;
 225 }
 226
 227 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 228 {
 229         struct gfs2_glock *gl;
 230         const struct gfs2_glock_operations *glops;
 231         unsigned int glmode;
 232         unsigned int gltype;
 233         unsigned long long glnum;
 234         char mode[16];
 235         int rv;
 236
 237         if (!capable(CAP_SYS_ADMIN))
 238                 return -EPERM;
 239
 240         rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum,
 241                     mode);
 242         if (rv != 3)
 243                 return -EINVAL;
 244
 245         if (strcmp(mode, "EX") == 0)
 246                 glmode = LM_ST_UNLOCKED;
 247         else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0))
 248                 glmode = LM_ST_DEFERRED;
 249         else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0))
 250                 glmode = LM_ST_SHARED;
 251         else
 252                 return -EINVAL;
 253
 254         if (gltype > LM_TYPE_JOURNAL)
 255                 return -EINVAL;
 256         if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK)
 257                 glops = &gfs2_freeze_glops;
 258         else
 259                 glops = gfs2_glops_list[gltype];
 260         if (glops == NULL)
 261                 return -EINVAL;
 262         if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags))
 263                 fs_info(sdp, "demote interface used\n");
 264         rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl);
 265         if (rv)
 266                 return rv;
 267         gfs2_glock_cb(gl, glmode);
 268         gfs2_glock_put(gl);
 269         return len;
 270 }
 271
 272
 273 #define GFS2_ATTR(name, mode, show, store) \
 274 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store)
 275
 276 GFS2_ATTR(id,                  0444, id_show,       NULL);
 277 GFS2_ATTR(fsname,              0444, fsname_show,   NULL);
 278 GFS2_ATTR(uuid,                0444, uuid_show,     NULL);
 279 GFS2_ATTR(freeze,              0644, freeze_show,   freeze_store);
 280 GFS2_ATTR(withdraw,            0644, withdraw_show, withdraw_store);
 281 GFS2_ATTR(statfs_sync,         0200, NULL,          statfs_sync_store);
 282 GFS2_ATTR(quota_sync,          0200, NULL,          quota_sync_store);
 283 GFS2_ATTR(quota_refresh_user,  0200, NULL,          quota_refresh_user_store);
 284 GFS2_ATTR(quota_refresh_group, 0200, NULL,          quota_refresh_group_store);
 285 GFS2_ATTR(demote_rq,           0200, NULL,          demote_rq_store);
 286
 287 static struct attribute *gfs2_attrs[] = {
 288         &gfs2_attr_id.attr,
 289         &gfs2_attr_fsname.attr,
 290         &gfs2_attr_uuid.attr,
 291         &gfs2_attr_freeze.attr,
 292         &gfs2_attr_withdraw.attr,
 293         &gfs2_attr_statfs_sync.attr,
 294         &gfs2_attr_quota_sync.attr,
 295         &gfs2_attr_quota_refresh_user.attr,
 296         &gfs2_attr_quota_refresh_group.attr,
 297         &gfs2_attr_demote_rq.attr,
 298         NULL,
 299 };
 300 ATTRIBUTE_GROUPS(gfs2);
 301
 302 static void gfs2_sbd_release(struct kobject *kobj)
 303 {
 304         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 305
 306         complete(&sdp->sd_kobj_unregister);
 307 }
 308
 309 static struct kobj_type gfs2_ktype = {
 310         .release = gfs2_sbd_release,
 311         .default_groups = gfs2_groups,
 312         .sysfs_ops     = &gfs2_attr_ops,
 313 };
 314
 315
 316 /*
 317  * lock_module. Originally from lock_dlm
 318  */
 319
 320 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
 321 {
 322         const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
 323         return sprintf(buf, "%s\n", ops->lm_proto_name);
 324 }
 325
 326 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
 327 {
 328         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 329         ssize_t ret;
 330         int val = 0;
 331
 332         if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))
 333                 val = 1;
 334         ret = sprintf(buf, "%d\n", val);
 335         return ret;
 336 }
 337
 338 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 339 {
 340         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 341         int ret, val;
 342
 343         ret = kstrtoint(buf, 0, &val);
 344         if (ret)
 345                 return ret;
 346
 347         if (val == 1)
 348                 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
 349         else if (val == 0) {
 350                 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags);
 351                 smp_mb__after_atomic();
 352                 gfs2_glock_thaw(sdp);
 353         } else {
 354                 return -EINVAL;
 355         }
 356         return len;
 357 }
 358
 359 static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf)
 360 {
 361         int val = completion_done(&sdp->sd_wdack) ? 1 : 0;
 362
 363         return sprintf(buf, "%d\n", val);
 364 }
 365
 366 static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 367 {
 368         int ret, val;
 369
 370         ret = kstrtoint(buf, 0, &val);
 371         if (ret)
 372                 return ret;
 373
 374         if ((val == 1) &&
 375             !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
 376                 complete(&sdp->sd_wdack);
 377         else
 378                 return -EINVAL;
 379         return len;
 380 }
 381
 382 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
 383 {
 384         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 385         return sprintf(buf, "%d\n", ls->ls_first);
 386 }
 387
 388 static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 389 {
 390         unsigned first;
 391         int rv;
 392
 393         rv = sscanf(buf, "%u", &first);
 394         if (rv != 1 || first > 1)
 395                 return -EINVAL;
 396         rv = wait_for_completion_killable(&sdp->sd_locking_init);
 397         if (rv)
 398                 return rv;
 399         spin_lock(&sdp->sd_jindex_spin);
 400         rv = -EBUSY;
 401         if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
 402                 goto out;
 403         rv = -EINVAL;
 404         if (sdp->sd_args.ar_spectator)
 405                 goto out;
 406         if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
 407                 goto out;
 408         sdp->sd_lockstruct.ls_first = first;
 409         rv = 0;
 410 out:
 411         spin_unlock(&sdp->sd_jindex_spin);
 412         return rv ? rv : len;
 413 }
 414
 415 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
 416 {
 417         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 418         return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags));
 419 }
 420
 421 int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
 422 {
 423         struct gfs2_jdesc *jd;
 424         int rv;
 425
 426         /* Wait for our primary journal to be initialized */
 427         wait_for_completion(&sdp->sd_journal_ready);
 428
 429         spin_lock(&sdp->sd_jindex_spin);
 430         rv = -EBUSY;
 431         /**
 432          * If we're a spectator, we use journal0, but it's not really ours.
 433          * So we need to wait for its recovery too. If we skip it we'd never
 434          * queue work to the recovery workqueue, and so its completion would
 435          * never clear the DFL_BLOCK_LOCKS flag, so all our locks would
 436          * permanently stop working.
 437          */
 438         if (!sdp->sd_jdesc)
 439                 goto out;
 440         if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator)
 441                 goto out;
 442         rv = -ENOENT;
 443         list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
 444                 if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator)
 445                         continue;
 446                 rv = gfs2_recover_journal(jd, false);
 447                 break;
 448         }
 449 out:
 450         spin_unlock(&sdp->sd_jindex_spin);
 451         return rv;
 452 }
 453
 454 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 455 {
 456         unsigned jid;
 457         int rv;
 458
 459         rv = sscanf(buf, "%u", &jid);
 460         if (rv != 1)
 461                 return -EINVAL;
 462
 463         if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) {
 464                 rv = -ESHUTDOWN;
 465                 goto out;
 466         }
 467
 468         rv = gfs2_recover_set(sdp, jid);
 469 out:
 470         return rv ? rv : len;
 471 }
 472
 473 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
 474 {
 475         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 476         return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
 477 }
 478
 479 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
 480 {
 481         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 482         return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
 483 }
 484
 485 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf)
 486 {
 487         return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid);
 488 }
 489
 490 static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 491 {
 492         int jid;
 493         int rv;
 494
 495         rv = sscanf(buf, "%d", &jid);
 496         if (rv != 1)
 497                 return -EINVAL;
 498         rv = wait_for_completion_killable(&sdp->sd_locking_init);
 499         if (rv)
 500                 return rv;
 501         spin_lock(&sdp->sd_jindex_spin);
 502         rv = -EINVAL;
 503         if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
 504                 goto out;
 505         rv = -EBUSY;
 506         if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0)
 507                 goto out;
 508         rv = 0;
 509         if (sdp->sd_args.ar_spectator && jid > 0)
 510                 rv = jid = -EINVAL;
 511         sdp->sd_lockstruct.ls_jid = jid;
 512         clear_bit(SDF_NOJOURNALID, &sdp->sd_flags);
 513         smp_mb__after_atomic();
 514         wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID);
 515 out:
 516         spin_unlock(&sdp->sd_jindex_spin);
 517         return rv ? rv : len;
 518 }
 519
 520 #define GDLM_ATTR(_name,_mode,_show,_store) \
 521 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
 522
 523 GDLM_ATTR(proto_name,           0444, proto_name_show,          NULL);
 524 GDLM_ATTR(block,                0644, block_show,               block_store);
 525 GDLM_ATTR(withdraw,             0644, wdack_show,               wdack_store);
 526 GDLM_ATTR(jid,                  0644, jid_show,                 jid_store);
 527 GDLM_ATTR(first,                0644, lkfirst_show,             lkfirst_store);
 528 GDLM_ATTR(first_done,           0444, first_done_show,          NULL);
 529 GDLM_ATTR(recover,              0600, NULL,                     recover_store);
 530 GDLM_ATTR(recover_done,         0444, recover_done_show,        NULL);
 531 GDLM_ATTR(recover_status,       0444, recover_status_show,      NULL);
 532
 533 static struct attribute *lock_module_attrs[] = {
 534         &gdlm_attr_proto_name.attr,
 535         &gdlm_attr_block.attr,
 536         &gdlm_attr_withdraw.attr,
 537         &gdlm_attr_jid.attr,
 538         &gdlm_attr_first.attr,
 539         &gdlm_attr_first_done.attr,
 540         &gdlm_attr_recover.attr,
 541         &gdlm_attr_recover_done.attr,
 542         &gdlm_attr_recover_status.attr,
 543         NULL,
 544 };
 545
 546 /*
 547  * get and set struct gfs2_tune fields
 548  */
 549
 550 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf)
 551 {
 552         return snprintf(buf, PAGE_SIZE, "%u %u\n",
 553                         sdp->sd_tune.gt_quota_scale_num,
 554                         sdp->sd_tune.gt_quota_scale_den);
 555 }
 556
 557 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf,
 558                                  size_t len)
 559 {
 560         struct gfs2_tune *gt = &sdp->sd_tune;
 561         unsigned int x, y;
 562
 563         if (!capable(CAP_SYS_ADMIN))
 564                 return -EPERM;
 565
 566         if (sscanf(buf, "%u %u", &x, &y) != 2 || !y)
 567                 return -EINVAL;
 568
 569         spin_lock(&gt->gt_spin);
 570         gt->gt_quota_scale_num = x;
 571         gt->gt_quota_scale_den = y;
 572         spin_unlock(&gt->gt_spin);
 573         return len;
 574 }
 575
 576 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field,
 577                         int check_zero, const char *buf, size_t len)
 578 {
 579         struct gfs2_tune *gt = &sdp->sd_tune;
 580         unsigned int x;
 581         int error;
 582
 583         if (!capable(CAP_SYS_ADMIN))
 584                 return -EPERM;
 585
 586         error = kstrtouint(buf, 0, &x);
 587         if (error)
 588                 return error;
 589
 590         if (check_zero && !x)
 591                 return -EINVAL;
 592
 593         spin_lock(&gt->gt_spin);
 594         *field = x;
 595         spin_unlock(&gt->gt_spin);
 596         return len;
 597 }
 598
 599 #define TUNE_ATTR_3(name, show, store)                                        \
 600 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store)
 601
 602 #define TUNE_ATTR_2(name, store)                                              \
 603 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf)                   \
 604 {                                                                             \
 605         return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name);      \
 606 }                                                                             \
 607 TUNE_ATTR_3(name, name##_show, store)
 608
 609 #define TUNE_ATTR(name, check_zero)                                           \
 610 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\
 611 {                                                                             \
 612         return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len);  \
 613 }                                                                             \
 614 TUNE_ATTR_2(name, name##_store)
 615
 616 TUNE_ATTR(quota_warn_period, 0);
 617 TUNE_ATTR(quota_quantum, 0);
 618 TUNE_ATTR(max_readahead, 0);
 619 TUNE_ATTR(complain_secs, 0);
 620 TUNE_ATTR(statfs_slow, 0);
 621 TUNE_ATTR(new_files_jdata, 0);
 622 TUNE_ATTR(statfs_quantum, 1);
 623 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store);
 624
 625 static struct attribute *tune_attrs[] = {
 626         &tune_attr_quota_warn_period.attr,
 627         &tune_attr_quota_quantum.attr,
 628         &tune_attr_max_readahead.attr,
 629         &tune_attr_complain_secs.attr,
 630         &tune_attr_statfs_slow.attr,
 631         &tune_attr_statfs_quantum.attr,
 632         &tune_attr_quota_scale.attr,
 633         &tune_attr_new_files_jdata.attr,
 634         NULL,
 635 };
 636
 637 static const struct attribute_group tune_group = {
 638         .name = "tune",
 639         .attrs = tune_attrs,
 640 };
 641
 642 static const struct attribute_group lock_module_group = {
 643         .name = "lock_module",
 644         .attrs = lock_module_attrs,
 645 };
 646
 647 int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
 648 {
 649         struct super_block *sb = sdp->sd_vfs;
 650         int error;
 651         char ro[20];
 652         char spectator[20];
 653         char *envp[] = { ro, spectator, NULL };
 654
 655         sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
 656         sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
 657
 658         init_completion(&sdp->sd_kobj_unregister);
 659         sdp->sd_kobj.kset = gfs2_kset;
 660         error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL,
 661                                      "%s", sdp->sd_table_name);
 662         if (error)
 663                 goto fail_reg;
 664
 665         error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
 666         if (error)
 667                 goto fail_reg;
 668
 669         error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
 670         if (error)
 671                 goto fail_tune;
 672
 673         error = sysfs_create_link(&sdp->sd_kobj,
 674                                   &disk_to_dev(sb->s_bdev->bd_disk)->kobj,
 675                                   "device");
 676         if (error)
 677                 goto fail_lock_module;
 678
 679         kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp);
 680         return 0;
 681
 682 fail_lock_module:
 683         sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
 684 fail_tune:
 685         sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 686 fail_reg:
 687         fs_err(sdp, "error %d adding sysfs files\n", error);
 688         kobject_put(&sdp->sd_kobj);
 689         wait_for_completion(&sdp->sd_kobj_unregister);
 690         sb->s_fs_info = NULL;
 691         return error;
 692 }
 693
 694 void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
 695 {
 696         sysfs_remove_link(&sdp->sd_kobj, "device");
 697         sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 698         sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
 699         kobject_put(&sdp->sd_kobj);
 700         wait_for_completion(&sdp->sd_kobj_unregister);
 701 }
 702
 703 static int gfs2_uevent(struct kset *kset, struct kobject *kobj,
 704                        struct kobj_uevent_env *env)
 705 {
 706         struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 707         struct super_block *s = sdp->sd_vfs;
 708
 709         add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name);
 710         add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name);
 711         if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags))
 712                 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid);
 713         if (!uuid_is_null(&s->s_uuid))
 714                 add_uevent_var(env, "UUID=%pUB", &s->s_uuid);
 715         return 0;
 716 }
 717
 718 static const struct kset_uevent_ops gfs2_uevent_ops = {
 719         .uevent = gfs2_uevent,
 720 };
 721
 722 int gfs2_sys_init(void)
 723 {
 724         gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj);
 725         if (!gfs2_kset)
 726                 return -ENOMEM;
 727         return 0;
 728 }
 729
 730 void gfs2_sys_uninit(void)
 731 {
 732         kset_unregister(gfs2_kset);
 733 }
 734