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 -EPERM; 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 -EPERM; 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 -EPERM; 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 -EPERM; 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 struct kqid qid; 177 int error; 178 u32 id; 179 180 if (!capable(CAP_SYS_ADMIN)) 181 return -EPERM; 182 183 id = simple_strtoul(buf, NULL, 0); 184 185 qid = make_kqid(current_user_ns(), USRQUOTA, id); 186 if (!qid_valid(qid)) 187 return -EINVAL; 188 189 error = gfs2_quota_refresh(sdp, qid); 190 return error ? error : len; 191 } 192 193 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, 194 size_t len) 195 { 196 struct kqid qid; 197 int error; 198 u32 id; 199 200 if (!capable(CAP_SYS_ADMIN)) 201 return -EPERM; 202 203 id = simple_strtoul(buf, NULL, 0); 204 205 qid = make_kqid(current_user_ns(), GRPQUOTA, id); 206 if (!qid_valid(qid)) 207 return -EINVAL; 208 209 error = gfs2_quota_refresh(sdp, qid); 210 return error ? error : len; 211 } 212 213 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 214 { 215 struct gfs2_glock *gl; 216 const struct gfs2_glock_operations *glops; 217 unsigned int glmode; 218 unsigned int gltype; 219 unsigned long long glnum; 220 char mode[16]; 221 int rv; 222 223 if (!capable(CAP_SYS_ADMIN)) 224 return -EPERM; 225 226 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum, 227 mode); 228 if (rv != 3) 229 return -EINVAL; 230 231 if (strcmp(mode, "EX") == 0) 232 glmode = LM_ST_UNLOCKED; 233 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0)) 234 glmode = LM_ST_DEFERRED; 235 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0)) 236 glmode = LM_ST_SHARED; 237 else 238 return -EINVAL; 239 240 if (gltype > LM_TYPE_JOURNAL) 241 return -EINVAL; 242 if (gltype == LM_TYPE_NONDISK && glnum == GFS2_TRANS_LOCK) 243 glops = &gfs2_trans_glops; 244 else 245 glops = gfs2_glops_list[gltype]; 246 if (glops == NULL) 247 return -EINVAL; 248 if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags)) 249 fs_info(sdp, "demote interface used\n"); 250 rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl); 251 if (rv) 252 return rv; 253 gfs2_glock_cb(gl, glmode); 254 gfs2_glock_put(gl); 255 return len; 256 } 257 258 259 #define GFS2_ATTR(name, mode, show, store) \ 260 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) 261 262 GFS2_ATTR(id, 0444, id_show, NULL); 263 GFS2_ATTR(fsname, 0444, fsname_show, NULL); 264 GFS2_ATTR(uuid, 0444, uuid_show, NULL); 265 GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); 266 GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store); 267 GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store); 268 GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store); 269 GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store); 270 GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store); 271 GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store); 272 273 static struct attribute *gfs2_attrs[] = { 274 &gfs2_attr_id.attr, 275 &gfs2_attr_fsname.attr, 276 &gfs2_attr_uuid.attr, 277 &gfs2_attr_freeze.attr, 278 &gfs2_attr_withdraw.attr, 279 &gfs2_attr_statfs_sync.attr, 280 &gfs2_attr_quota_sync.attr, 281 &gfs2_attr_quota_refresh_user.attr, 282 &gfs2_attr_quota_refresh_group.attr, 283 &gfs2_attr_demote_rq.attr, 284 NULL, 285 }; 286 287 static void gfs2_sbd_release(struct kobject *kobj) 288 { 289 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); 290 291 kfree(sdp); 292 } 293 294 static struct kobj_type gfs2_ktype = { 295 .release = gfs2_sbd_release, 296 .default_attrs = gfs2_attrs, 297 .sysfs_ops = &gfs2_attr_ops, 298 }; 299 300 301 /* 302 * lock_module. Originally from lock_dlm 303 */ 304 305 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf) 306 { 307 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops; 308 return sprintf(buf, "%s\n", ops->lm_proto_name); 309 } 310 311 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf) 312 { 313 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 314 ssize_t ret; 315 int val = 0; 316 317 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags)) 318 val = 1; 319 ret = sprintf(buf, "%d\n", val); 320 return ret; 321 } 322 323 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 324 { 325 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 326 ssize_t ret = len; 327 int val; 328 329 val = simple_strtol(buf, NULL, 0); 330 331 if (val == 1) 332 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); 333 else if (val == 0) { 334 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); 335 smp_mb__after_clear_bit(); 336 gfs2_glock_thaw(sdp); 337 } else { 338 ret = -EINVAL; 339 } 340 return ret; 341 } 342 343 static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf) 344 { 345 int val = completion_done(&sdp->sd_wdack) ? 1 : 0; 346 347 return sprintf(buf, "%d\n", val); 348 } 349 350 static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 351 { 352 ssize_t ret = len; 353 int val; 354 355 val = simple_strtol(buf, NULL, 0); 356 357 if ((val == 1) && 358 !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm")) 359 complete(&sdp->sd_wdack); 360 else 361 ret = -EINVAL; 362 return ret; 363 } 364 365 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) 366 { 367 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 368 return sprintf(buf, "%d\n", ls->ls_first); 369 } 370 371 static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 372 { 373 unsigned first; 374 int rv; 375 376 rv = sscanf(buf, "%u", &first); 377 if (rv != 1 || first > 1) 378 return -EINVAL; 379 rv = wait_for_completion_killable(&sdp->sd_locking_init); 380 if (rv) 381 return rv; 382 spin_lock(&sdp->sd_jindex_spin); 383 rv = -EBUSY; 384 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) 385 goto out; 386 rv = -EINVAL; 387 if (sdp->sd_args.ar_spectator) 388 goto out; 389 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) 390 goto out; 391 sdp->sd_lockstruct.ls_first = first; 392 rv = 0; 393 out: 394 spin_unlock(&sdp->sd_jindex_spin); 395 return rv ? rv : len; 396 } 397 398 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) 399 { 400 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 401 return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags)); 402 } 403 404 int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid) 405 { 406 struct gfs2_jdesc *jd; 407 int rv; 408 409 spin_lock(&sdp->sd_jindex_spin); 410 rv = -EBUSY; 411 if (sdp->sd_jdesc->jd_jid == jid) 412 goto out; 413 rv = -ENOENT; 414 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 415 if (jd->jd_jid != jid) 416 continue; 417 rv = gfs2_recover_journal(jd, false); 418 break; 419 } 420 out: 421 spin_unlock(&sdp->sd_jindex_spin); 422 return rv; 423 } 424 425 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 426 { 427 unsigned jid; 428 int rv; 429 430 rv = sscanf(buf, "%u", &jid); 431 if (rv != 1) 432 return -EINVAL; 433 434 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { 435 rv = -ESHUTDOWN; 436 goto out; 437 } 438 439 rv = gfs2_recover_set(sdp, jid); 440 out: 441 return rv ? rv : len; 442 } 443 444 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) 445 { 446 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 447 return sprintf(buf, "%d\n", ls->ls_recover_jid_done); 448 } 449 450 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) 451 { 452 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 453 return sprintf(buf, "%d\n", ls->ls_recover_jid_status); 454 } 455 456 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) 457 { 458 return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); 459 } 460 461 static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 462 { 463 int jid; 464 int rv; 465 466 rv = sscanf(buf, "%d", &jid); 467 if (rv != 1) 468 return -EINVAL; 469 rv = wait_for_completion_killable(&sdp->sd_locking_init); 470 if (rv) 471 return rv; 472 spin_lock(&sdp->sd_jindex_spin); 473 rv = -EINVAL; 474 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) 475 goto out; 476 rv = -EBUSY; 477 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) 478 goto out; 479 rv = 0; 480 if (sdp->sd_args.ar_spectator && jid > 0) 481 rv = jid = -EINVAL; 482 sdp->sd_lockstruct.ls_jid = jid; 483 clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); 484 smp_mb__after_clear_bit(); 485 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); 486 out: 487 spin_unlock(&sdp->sd_jindex_spin); 488 return rv ? rv : len; 489 } 490 491 #define GDLM_ATTR(_name,_mode,_show,_store) \ 492 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) 493 494 GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); 495 GDLM_ATTR(block, 0644, block_show, block_store); 496 GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store); 497 GDLM_ATTR(jid, 0644, jid_show, jid_store); 498 GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); 499 GDLM_ATTR(first_done, 0444, first_done_show, NULL); 500 GDLM_ATTR(recover, 0600, NULL, recover_store); 501 GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); 502 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); 503 504 static struct attribute *lock_module_attrs[] = { 505 &gdlm_attr_proto_name.attr, 506 &gdlm_attr_block.attr, 507 &gdlm_attr_withdraw.attr, 508 &gdlm_attr_jid.attr, 509 &gdlm_attr_first.attr, 510 &gdlm_attr_first_done.attr, 511 &gdlm_attr_recover.attr, 512 &gdlm_attr_recover_done.attr, 513 &gdlm_attr_recover_status.attr, 514 NULL, 515 }; 516 517 /* 518 * get and set struct gfs2_tune fields 519 */ 520 521 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) 522 { 523 return snprintf(buf, PAGE_SIZE, "%u %u\n", 524 sdp->sd_tune.gt_quota_scale_num, 525 sdp->sd_tune.gt_quota_scale_den); 526 } 527 528 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, 529 size_t len) 530 { 531 struct gfs2_tune *gt = &sdp->sd_tune; 532 unsigned int x, y; 533 534 if (!capable(CAP_SYS_ADMIN)) 535 return -EPERM; 536 537 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) 538 return -EINVAL; 539 540 spin_lock(>->gt_spin); 541 gt->gt_quota_scale_num = x; 542 gt->gt_quota_scale_den = y; 543 spin_unlock(>->gt_spin); 544 return len; 545 } 546 547 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, 548 int check_zero, const char *buf, size_t len) 549 { 550 struct gfs2_tune *gt = &sdp->sd_tune; 551 unsigned int x; 552 553 if (!capable(CAP_SYS_ADMIN)) 554 return -EPERM; 555 556 x = simple_strtoul(buf, NULL, 0); 557 558 if (check_zero && !x) 559 return -EINVAL; 560 561 spin_lock(>->gt_spin); 562 *field = x; 563 spin_unlock(>->gt_spin); 564 return len; 565 } 566 567 #define TUNE_ATTR_3(name, show, store) \ 568 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) 569 570 #define TUNE_ATTR_2(name, store) \ 571 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ 572 { \ 573 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ 574 } \ 575 TUNE_ATTR_3(name, name##_show, store) 576 577 #define TUNE_ATTR(name, check_zero) \ 578 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ 579 { \ 580 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ 581 } \ 582 TUNE_ATTR_2(name, name##_store) 583 584 TUNE_ATTR(quota_warn_period, 0); 585 TUNE_ATTR(quota_quantum, 0); 586 TUNE_ATTR(max_readahead, 0); 587 TUNE_ATTR(complain_secs, 0); 588 TUNE_ATTR(statfs_slow, 0); 589 TUNE_ATTR(new_files_jdata, 0); 590 TUNE_ATTR(quota_simul_sync, 1); 591 TUNE_ATTR(statfs_quantum, 1); 592 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); 593 594 static struct attribute *tune_attrs[] = { 595 &tune_attr_quota_warn_period.attr, 596 &tune_attr_quota_quantum.attr, 597 &tune_attr_max_readahead.attr, 598 &tune_attr_complain_secs.attr, 599 &tune_attr_statfs_slow.attr, 600 &tune_attr_quota_simul_sync.attr, 601 &tune_attr_statfs_quantum.attr, 602 &tune_attr_quota_scale.attr, 603 &tune_attr_new_files_jdata.attr, 604 NULL, 605 }; 606 607 static struct attribute_group tune_group = { 608 .name = "tune", 609 .attrs = tune_attrs, 610 }; 611 612 static struct attribute_group lock_module_group = { 613 .name = "lock_module", 614 .attrs = lock_module_attrs, 615 }; 616 617 int gfs2_sys_fs_add(struct gfs2_sbd *sdp) 618 { 619 struct super_block *sb = sdp->sd_vfs; 620 int error; 621 char ro[20]; 622 char spectator[20]; 623 char *envp[] = { ro, spectator, NULL }; 624 int sysfs_frees_sdp = 0; 625 626 sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0); 627 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); 628 629 sdp->sd_kobj.kset = gfs2_kset; 630 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, 631 "%s", sdp->sd_table_name); 632 if (error) 633 goto fail_reg; 634 635 sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling 636 function gfs2_sbd_release. */ 637 error = sysfs_create_group(&sdp->sd_kobj, &tune_group); 638 if (error) 639 goto fail_reg; 640 641 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); 642 if (error) 643 goto fail_tune; 644 645 error = sysfs_create_link(&sdp->sd_kobj, 646 &disk_to_dev(sb->s_bdev->bd_disk)->kobj, 647 "device"); 648 if (error) 649 goto fail_lock_module; 650 651 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); 652 return 0; 653 654 fail_lock_module: 655 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); 656 fail_tune: 657 sysfs_remove_group(&sdp->sd_kobj, &tune_group); 658 fail_reg: 659 free_percpu(sdp->sd_lkstats); 660 fs_err(sdp, "error %d adding sysfs files", error); 661 if (sysfs_frees_sdp) 662 kobject_put(&sdp->sd_kobj); 663 else 664 kfree(sdp); 665 sb->s_fs_info = NULL; 666 return error; 667 } 668 669 void gfs2_sys_fs_del(struct gfs2_sbd *sdp) 670 { 671 sysfs_remove_link(&sdp->sd_kobj, "device"); 672 sysfs_remove_group(&sdp->sd_kobj, &tune_group); 673 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); 674 kobject_put(&sdp->sd_kobj); 675 } 676 677 static int gfs2_uevent(struct kset *kset, struct kobject *kobj, 678 struct kobj_uevent_env *env) 679 { 680 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); 681 struct super_block *s = sdp->sd_vfs; 682 const u8 *uuid = s->s_uuid; 683 684 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); 685 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); 686 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) 687 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); 688 if (gfs2_uuid_valid(uuid)) 689 add_uevent_var(env, "UUID=%pUB", uuid); 690 return 0; 691 } 692 693 static const struct kset_uevent_ops gfs2_uevent_ops = { 694 .uevent = gfs2_uevent, 695 }; 696 697 int gfs2_sys_init(void) 698 { 699 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); 700 if (!gfs2_kset) 701 return -ENOMEM; 702 return 0; 703 } 704 705 void gfs2_sys_uninit(void) 706 { 707 kset_unregister(gfs2_kset); 708 } 709 710