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/blkdev.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 sysfs_emit(buf, "%u:%u\n", 63 MAJOR(sdp->sd_vfs->s_dev), MINOR(sdp->sd_vfs->s_dev)); 64 } 65 66 static ssize_t status_show(struct gfs2_sbd *sdp, char *buf) 67 { 68 unsigned long f = sdp->sd_flags; 69 ssize_t s; 70 71 s = sysfs_emit(buf, 72 "Journal Checked: %d\n" 73 "Journal Live: %d\n" 74 "Journal ID: %d\n" 75 "Spectator: %d\n" 76 "Withdrawn: %d\n" 77 "No barriers: %d\n" 78 "No recovery: %d\n" 79 "Demote: %d\n" 80 "No Journal ID: %d\n" 81 "Mounted RO: %d\n" 82 "RO Recovery: %d\n" 83 "Skip DLM Unlock: %d\n" 84 "Force AIL Flush: %d\n" 85 "FS Freeze Initiator: %d\n" 86 "FS Frozen: %d\n" 87 "Killing: %d\n" 88 "sd_log_error: %d\n" 89 "sd_log_flush_lock: %d\n" 90 "sd_log_num_revoke: %u\n" 91 "sd_log_in_flight: %d\n" 92 "sd_log_blks_needed: %d\n" 93 "sd_log_blks_free: %d\n" 94 "sd_log_flush_head: %d\n" 95 "sd_log_flush_tail: %d\n" 96 "sd_log_blks_reserved: %d\n" 97 "sd_log_revokes_available: %d\n" 98 "sd_log_pinned: %d\n" 99 "sd_log_thresh1: %d\n" 100 "sd_log_thresh2: %d\n", 101 test_bit(SDF_JOURNAL_CHECKED, &f), 102 test_bit(SDF_JOURNAL_LIVE, &f), 103 (sdp->sd_jdesc ? sdp->sd_jdesc->jd_jid : 0), 104 (sdp->sd_args.ar_spectator ? 1 : 0), 105 test_bit(SDF_WITHDRAWN, &f), 106 test_bit(SDF_NOBARRIERS, &f), 107 test_bit(SDF_NORECOVERY, &f), 108 test_bit(SDF_DEMOTE, &f), 109 test_bit(SDF_NOJOURNALID, &f), 110 (sb_rdonly(sdp->sd_vfs) ? 1 : 0), 111 test_bit(SDF_RORECOVERY, &f), 112 test_bit(SDF_SKIP_DLM_UNLOCK, &f), 113 test_bit(SDF_FORCE_AIL_FLUSH, &f), 114 test_bit(SDF_FREEZE_INITIATOR, &f), 115 test_bit(SDF_FROZEN, &f), 116 test_bit(SDF_KILL, &f), 117 sdp->sd_log_error, 118 rwsem_is_locked(&sdp->sd_log_flush_lock), 119 sdp->sd_log_num_revoke, 120 atomic_read(&sdp->sd_log_in_flight), 121 atomic_read(&sdp->sd_log_blks_needed), 122 atomic_read(&sdp->sd_log_blks_free), 123 sdp->sd_log_flush_head, 124 sdp->sd_log_flush_tail, 125 sdp->sd_log_blks_reserved, 126 atomic_read(&sdp->sd_log_revokes_available), 127 atomic_read(&sdp->sd_log_pinned), 128 atomic_read(&sdp->sd_log_thresh1), 129 atomic_read(&sdp->sd_log_thresh2)); 130 return s; 131 } 132 133 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf) 134 { 135 return sysfs_emit(buf, "%s\n", sdp->sd_fsname); 136 } 137 138 static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf) 139 { 140 struct super_block *s = sdp->sd_vfs; 141 142 buf[0] = '\0'; 143 if (uuid_is_null(&s->s_uuid)) 144 return 0; 145 return sysfs_emit(buf, "%pUB\n", &s->s_uuid); 146 } 147 148 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf) 149 { 150 struct super_block *sb = sdp->sd_vfs; 151 int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1; 152 153 return sysfs_emit(buf, "%d\n", frozen); 154 } 155 156 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 157 { 158 int error, n; 159 160 error = kstrtoint(buf, 0, &n); 161 if (error) 162 return error; 163 164 if (!capable(CAP_SYS_ADMIN)) 165 return -EPERM; 166 167 switch (n) { 168 case 0: 169 error = thaw_super(sdp->sd_vfs, FREEZE_HOLDER_USERSPACE, NULL); 170 break; 171 case 1: 172 error = freeze_super(sdp->sd_vfs, FREEZE_HOLDER_USERSPACE, NULL); 173 break; 174 default: 175 return -EINVAL; 176 } 177 178 if (error) { 179 fs_warn(sdp, "freeze %d error %d\n", n, error); 180 return error; 181 } 182 183 return len; 184 } 185 186 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf) 187 { 188 unsigned int b = gfs2_withdrawn(sdp); 189 return sysfs_emit(buf, "%u\n", b); 190 } 191 192 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 193 { 194 int error, val; 195 196 if (!capable(CAP_SYS_ADMIN)) 197 return -EPERM; 198 199 error = kstrtoint(buf, 0, &val); 200 if (error) 201 return error; 202 203 if (val != 1) 204 return -EINVAL; 205 206 gfs2_lm(sdp, "withdrawing from cluster at user's request\n"); 207 gfs2_withdraw(sdp); 208 209 return len; 210 } 211 212 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf, 213 size_t len) 214 { 215 int error, val; 216 217 if (!capable(CAP_SYS_ADMIN)) 218 return -EPERM; 219 220 error = kstrtoint(buf, 0, &val); 221 if (error) 222 return error; 223 224 if (val != 1) 225 return -EINVAL; 226 227 gfs2_statfs_sync(sdp->sd_vfs, 0); 228 return len; 229 } 230 231 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf, 232 size_t len) 233 { 234 int error, val; 235 236 if (!capable(CAP_SYS_ADMIN)) 237 return -EPERM; 238 239 error = kstrtoint(buf, 0, &val); 240 if (error) 241 return error; 242 243 if (val != 1) 244 return -EINVAL; 245 246 gfs2_quota_sync(sdp->sd_vfs, 0); 247 return len; 248 } 249 250 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf, 251 size_t len) 252 { 253 struct kqid qid; 254 int error; 255 u32 id; 256 257 if (!capable(CAP_SYS_ADMIN)) 258 return -EPERM; 259 260 error = kstrtou32(buf, 0, &id); 261 if (error) 262 return error; 263 264 qid = make_kqid(current_user_ns(), USRQUOTA, id); 265 if (!qid_valid(qid)) 266 return -EINVAL; 267 268 error = gfs2_quota_refresh(sdp, qid); 269 return error ? error : len; 270 } 271 272 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, 273 size_t len) 274 { 275 struct kqid qid; 276 int error; 277 u32 id; 278 279 if (!capable(CAP_SYS_ADMIN)) 280 return -EPERM; 281 282 error = kstrtou32(buf, 0, &id); 283 if (error) 284 return error; 285 286 qid = make_kqid(current_user_ns(), GRPQUOTA, id); 287 if (!qid_valid(qid)) 288 return -EINVAL; 289 290 error = gfs2_quota_refresh(sdp, qid); 291 return error ? error : len; 292 } 293 294 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 295 { 296 struct gfs2_glock *gl; 297 const struct gfs2_glock_operations *glops; 298 unsigned int glmode; 299 unsigned int gltype; 300 unsigned long long glnum; 301 char mode[16]; 302 int rv; 303 304 if (!capable(CAP_SYS_ADMIN)) 305 return -EPERM; 306 307 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum, 308 mode); 309 if (rv != 3) 310 return -EINVAL; 311 312 if (strcmp(mode, "EX") == 0) 313 glmode = LM_ST_UNLOCKED; 314 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0)) 315 glmode = LM_ST_DEFERRED; 316 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0)) 317 glmode = LM_ST_SHARED; 318 else 319 return -EINVAL; 320 321 if (gltype > LM_TYPE_JOURNAL) 322 return -EINVAL; 323 if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK) 324 glops = &gfs2_freeze_glops; 325 else 326 glops = gfs2_glops_list[gltype]; 327 if (glops == NULL) 328 return -EINVAL; 329 if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags)) 330 fs_info(sdp, "demote interface used\n"); 331 rv = gfs2_glock_get(sdp, glnum, glops, NO_CREATE, &gl); 332 if (rv) 333 return rv; 334 gfs2_glock_cb(gl, glmode); 335 gfs2_glock_put(gl); 336 return len; 337 } 338 339 340 #define GFS2_ATTR(name, mode, show, store) \ 341 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) 342 343 GFS2_ATTR(id, 0444, id_show, NULL); 344 GFS2_ATTR(fsname, 0444, fsname_show, NULL); 345 GFS2_ATTR(uuid, 0444, uuid_show, NULL); 346 GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); 347 GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store); 348 GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store); 349 GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store); 350 GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store); 351 GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store); 352 GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store); 353 GFS2_ATTR(status, 0400, status_show, NULL); 354 355 static struct attribute *gfs2_attrs[] = { 356 &gfs2_attr_id.attr, 357 &gfs2_attr_fsname.attr, 358 &gfs2_attr_uuid.attr, 359 &gfs2_attr_freeze.attr, 360 &gfs2_attr_withdraw.attr, 361 &gfs2_attr_statfs_sync.attr, 362 &gfs2_attr_quota_sync.attr, 363 &gfs2_attr_quota_refresh_user.attr, 364 &gfs2_attr_quota_refresh_group.attr, 365 &gfs2_attr_demote_rq.attr, 366 &gfs2_attr_status.attr, 367 NULL, 368 }; 369 ATTRIBUTE_GROUPS(gfs2); 370 371 static void gfs2_sbd_release(struct kobject *kobj) 372 { 373 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); 374 375 complete(&sdp->sd_kobj_unregister); 376 } 377 378 static struct kobj_type gfs2_ktype = { 379 .release = gfs2_sbd_release, 380 .default_groups = gfs2_groups, 381 .sysfs_ops = &gfs2_attr_ops, 382 }; 383 384 385 /* 386 * lock_module. Originally from lock_dlm 387 */ 388 389 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf) 390 { 391 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops; 392 return sysfs_emit(buf, "%s\n", ops->lm_proto_name); 393 } 394 395 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf) 396 { 397 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 398 ssize_t ret; 399 int val = 0; 400 401 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags)) 402 val = 1; 403 ret = sysfs_emit(buf, "%d\n", val); 404 return ret; 405 } 406 407 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 408 { 409 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 410 int ret, val; 411 412 ret = kstrtoint(buf, 0, &val); 413 if (ret) 414 return ret; 415 416 if (val == 1) 417 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); 418 else if (val == 0) { 419 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); 420 smp_mb__after_atomic(); 421 gfs2_glock_thaw(sdp); 422 } else { 423 return -EINVAL; 424 } 425 return len; 426 } 427 428 static ssize_t withdraw_helper_status_store(struct gfs2_sbd *sdp, 429 const char *buf, 430 size_t len) 431 { 432 int ret, val; 433 434 ret = kstrtoint(buf, 0, &val); 435 if (ret) 436 return ret; 437 if (val < 0 || val > 1) 438 return -EINVAL; 439 440 sdp->sd_withdraw_helper_status = val; 441 complete(&sdp->sd_withdraw_helper); 442 return len; 443 } 444 445 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) 446 { 447 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 448 return sysfs_emit(buf, "%d\n", ls->ls_first); 449 } 450 451 static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 452 { 453 unsigned first; 454 int rv; 455 456 rv = sscanf(buf, "%u", &first); 457 if (rv != 1 || first > 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 = -EBUSY; 464 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) 465 goto out; 466 rv = -EINVAL; 467 if (sdp->sd_args.ar_spectator) 468 goto out; 469 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) 470 goto out; 471 sdp->sd_lockstruct.ls_first = first; 472 rv = 0; 473 out: 474 spin_unlock(&sdp->sd_jindex_spin); 475 return rv ? rv : len; 476 } 477 478 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) 479 { 480 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 481 return sysfs_emit(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags)); 482 } 483 484 int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid) 485 { 486 struct gfs2_jdesc *jd; 487 int rv; 488 489 /* Wait for our primary journal to be initialized */ 490 wait_for_completion(&sdp->sd_journal_ready); 491 492 spin_lock(&sdp->sd_jindex_spin); 493 rv = -EBUSY; 494 /** 495 * If we're a spectator, we use journal0, but it's not really ours. 496 * So we need to wait for its recovery too. If we skip it we'd never 497 * queue work to the recovery workqueue, and so its completion would 498 * never clear the DFL_BLOCK_LOCKS flag, so all our locks would 499 * permanently stop working. 500 */ 501 if (!sdp->sd_jdesc) 502 goto out; 503 if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator) 504 goto out; 505 rv = -ENOENT; 506 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 507 if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator) 508 continue; 509 rv = gfs2_recover_journal(jd, false); 510 break; 511 } 512 out: 513 spin_unlock(&sdp->sd_jindex_spin); 514 return rv; 515 } 516 517 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 518 { 519 unsigned jid; 520 int rv; 521 522 rv = sscanf(buf, "%u", &jid); 523 if (rv != 1) 524 return -EINVAL; 525 526 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { 527 rv = -ESHUTDOWN; 528 goto out; 529 } 530 531 rv = gfs2_recover_set(sdp, jid); 532 out: 533 return rv ? rv : len; 534 } 535 536 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) 537 { 538 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 539 return sysfs_emit(buf, "%d\n", ls->ls_recover_jid_done); 540 } 541 542 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) 543 { 544 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 545 return sysfs_emit(buf, "%d\n", ls->ls_recover_jid_status); 546 } 547 548 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) 549 { 550 return sysfs_emit(buf, "%d\n", sdp->sd_lockstruct.ls_jid); 551 } 552 553 static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 554 { 555 int jid; 556 int rv; 557 558 rv = sscanf(buf, "%d", &jid); 559 if (rv != 1) 560 return -EINVAL; 561 rv = wait_for_completion_killable(&sdp->sd_locking_init); 562 if (rv) 563 return rv; 564 spin_lock(&sdp->sd_jindex_spin); 565 rv = -EINVAL; 566 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) 567 goto out; 568 rv = -EBUSY; 569 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) 570 goto out; 571 rv = 0; 572 if (sdp->sd_args.ar_spectator && jid > 0) 573 rv = jid = -EINVAL; 574 sdp->sd_lockstruct.ls_jid = jid; 575 clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); 576 smp_mb__after_atomic(); 577 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); 578 out: 579 spin_unlock(&sdp->sd_jindex_spin); 580 return rv ? rv : len; 581 } 582 583 #define GDLM_ATTR(_name,_mode,_show,_store) \ 584 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) 585 586 GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); 587 GDLM_ATTR(block, 0644, block_show, block_store); 588 GDLM_ATTR(withdraw, 0200, NULL, withdraw_helper_status_store); 589 GDLM_ATTR(jid, 0644, jid_show, jid_store); 590 GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); 591 GDLM_ATTR(first_done, 0444, first_done_show, NULL); 592 GDLM_ATTR(recover, 0600, NULL, recover_store); 593 GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); 594 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); 595 596 static struct attribute *lock_module_attrs[] = { 597 &gdlm_attr_proto_name.attr, 598 &gdlm_attr_block.attr, 599 &gdlm_attr_withdraw.attr, 600 &gdlm_attr_jid.attr, 601 &gdlm_attr_first.attr, 602 &gdlm_attr_first_done.attr, 603 &gdlm_attr_recover.attr, 604 &gdlm_attr_recover_done.attr, 605 &gdlm_attr_recover_status.attr, 606 NULL, 607 }; 608 609 /* 610 * get and set struct gfs2_tune fields 611 */ 612 613 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) 614 { 615 return sysfs_emit(buf, "%u %u\n", 616 sdp->sd_tune.gt_quota_scale_num, 617 sdp->sd_tune.gt_quota_scale_den); 618 } 619 620 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, 621 size_t len) 622 { 623 struct gfs2_tune *gt = &sdp->sd_tune; 624 unsigned int x, y; 625 626 if (!capable(CAP_SYS_ADMIN)) 627 return -EPERM; 628 629 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) 630 return -EINVAL; 631 632 spin_lock(>->gt_spin); 633 gt->gt_quota_scale_num = x; 634 gt->gt_quota_scale_den = y; 635 spin_unlock(>->gt_spin); 636 return len; 637 } 638 639 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, 640 int check_zero, const char *buf, size_t len) 641 { 642 struct gfs2_tune *gt = &sdp->sd_tune; 643 unsigned int x; 644 int error; 645 646 if (!capable(CAP_SYS_ADMIN)) 647 return -EPERM; 648 649 error = kstrtouint(buf, 0, &x); 650 if (error) 651 return error; 652 653 if (check_zero && !x) 654 return -EINVAL; 655 656 spin_lock(>->gt_spin); 657 *field = x; 658 spin_unlock(>->gt_spin); 659 return len; 660 } 661 662 #define TUNE_ATTR_3(name, show, store) \ 663 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) 664 665 #define TUNE_ATTR_2(name, store) \ 666 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ 667 { \ 668 return sysfs_emit(buf, "%u\n", sdp->sd_tune.gt_##name); \ 669 } \ 670 TUNE_ATTR_3(name, name##_show, store) 671 672 #define TUNE_ATTR(name, check_zero) \ 673 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ 674 { \ 675 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ 676 } \ 677 TUNE_ATTR_2(name, name##_store) 678 679 TUNE_ATTR(quota_warn_period, 0); 680 TUNE_ATTR(quota_quantum, 0); 681 TUNE_ATTR(max_readahead, 0); 682 TUNE_ATTR(complain_secs, 0); 683 TUNE_ATTR(statfs_slow, 0); 684 TUNE_ATTR(new_files_jdata, 0); 685 TUNE_ATTR(statfs_quantum, 1); 686 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); 687 TUNE_ATTR(withdraw_helper_timeout, 1); 688 689 static struct attribute *tune_attrs[] = { 690 &tune_attr_quota_warn_period.attr, 691 &tune_attr_quota_quantum.attr, 692 &tune_attr_max_readahead.attr, 693 &tune_attr_complain_secs.attr, 694 &tune_attr_statfs_slow.attr, 695 &tune_attr_statfs_quantum.attr, 696 &tune_attr_quota_scale.attr, 697 &tune_attr_new_files_jdata.attr, 698 &tune_attr_withdraw_helper_timeout.attr, 699 NULL, 700 }; 701 702 static const struct attribute_group tune_group = { 703 .name = "tune", 704 .attrs = tune_attrs, 705 }; 706 707 static const struct attribute_group lock_module_group = { 708 .name = "lock_module", 709 .attrs = lock_module_attrs, 710 }; 711 712 int gfs2_sys_fs_add(struct gfs2_sbd *sdp) 713 { 714 struct super_block *sb = sdp->sd_vfs; 715 int error; 716 char ro[20]; 717 char spectator[20]; 718 char *envp[] = { ro, spectator, NULL }; 719 720 sprintf(ro, "RDONLY=%d", sb_rdonly(sb)); 721 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); 722 723 init_completion(&sdp->sd_kobj_unregister); 724 sdp->sd_kobj.kset = gfs2_kset; 725 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, 726 "%s", sdp->sd_table_name); 727 if (error) 728 goto fail_reg; 729 730 error = sysfs_create_group(&sdp->sd_kobj, &tune_group); 731 if (error) 732 goto fail_reg; 733 734 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); 735 if (error) 736 goto fail_tune; 737 738 error = sysfs_create_link(&sdp->sd_kobj, 739 &disk_to_dev(sb->s_bdev->bd_disk)->kobj, 740 "device"); 741 if (error) 742 goto fail_lock_module; 743 744 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); 745 return 0; 746 747 fail_lock_module: 748 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); 749 fail_tune: 750 sysfs_remove_group(&sdp->sd_kobj, &tune_group); 751 fail_reg: 752 fs_err(sdp, "error %d adding sysfs files\n", error); 753 kobject_put(&sdp->sd_kobj); 754 wait_for_completion(&sdp->sd_kobj_unregister); 755 return error; 756 } 757 758 void gfs2_sys_fs_del(struct gfs2_sbd *sdp) 759 { 760 sysfs_remove_link(&sdp->sd_kobj, "device"); 761 sysfs_remove_group(&sdp->sd_kobj, &tune_group); 762 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); 763 kobject_put(&sdp->sd_kobj); 764 wait_for_completion(&sdp->sd_kobj_unregister); 765 } 766 767 static int gfs2_uevent(const struct kobject *kobj, struct kobj_uevent_env *env) 768 { 769 const struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); 770 const struct super_block *s = sdp->sd_vfs; 771 772 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); 773 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); 774 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) 775 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); 776 if (!uuid_is_null(&s->s_uuid)) 777 add_uevent_var(env, "UUID=%pUB", &s->s_uuid); 778 return 0; 779 } 780 781 static const struct kset_uevent_ops gfs2_uevent_ops = { 782 .uevent = gfs2_uevent, 783 }; 784 785 int gfs2_sys_init(void) 786 { 787 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); 788 if (!gfs2_kset) 789 return -ENOMEM; 790 return 0; 791 } 792 793 void gfs2_sys_uninit(void) 794 { 795 kset_unregister(gfs2_kset); 796 } 797 798