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 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 status_show(struct gfs2_sbd *sdp, char *buf) 67 { 68 unsigned long f = sdp->sd_flags; 69 ssize_t s; 70 71 s = snprintf(buf, PAGE_SIZE, 72 "Journal Checked: %d\n" 73 "Journal Live: %d\n" 74 "Journal ID: %d\n" 75 "Spectator: %d\n" 76 "Withdrawn: %d\n" 77 "No barriers: %d\n" 78 "No recovery: %d\n" 79 "Demote: %d\n" 80 "No Journal ID: %d\n" 81 "Mounted RO: %d\n" 82 "RO Recovery: %d\n" 83 "Skip DLM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 Frozen: %d\n" 86 "Withdrawing: %d\n" 87 "Withdraw In Prog: %d\n" 88 "Remote Withdraw: %d\n" 89 "Withdraw Recovery: %d\n" 90 "Deactivating: %d\n" 91 "sd_log_error: %d\n" 92 "sd_log_flush_lock: %d\n" 93 "sd_log_num_revoke: %u\n" 94 "sd_log_in_flight: %d\n" 95 "sd_log_blks_needed: %d\n" 96 "sd_log_blks_free: %d\n" 97 "sd_log_flush_head: %d\n" 98 "sd_log_flush_tail: %d\n" 99 "sd_log_blks_reserved: %d\n" 100 "sd_log_revokes_available: %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_FS_FROZEN, &f), 115 test_bit(SDF_WITHDRAWING, &f), 116 test_bit(SDF_WITHDRAW_IN_PROG, &f), 117 test_bit(SDF_REMOTE_WITHDRAW, &f), 118 test_bit(SDF_WITHDRAW_RECOVERY, &f), 119 test_bit(SDF_DEACTIVATING, &f), 120 sdp->sd_log_error, 121 rwsem_is_locked(&sdp->sd_log_flush_lock), 122 sdp->sd_log_num_revoke, 123 atomic_read(&sdp->sd_log_in_flight), 124 atomic_read(&sdp->sd_log_blks_needed), 125 atomic_read(&sdp->sd_log_blks_free), 126 sdp->sd_log_flush_head, 127 sdp->sd_log_flush_tail, 128 sdp->sd_log_blks_reserved, 129 atomic_read(&sdp->sd_log_revokes_available)); 130 return s; 131 } 132 133 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf) 134 { 135 return snprintf(buf, PAGE_SIZE, "%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 snprintf(buf, PAGE_SIZE, "%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 snprintf(buf, PAGE_SIZE, "%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); 170 break; 171 case 1: 172 error = freeze_super(sdp->sd_vfs); 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 snprintf(buf, PAGE_SIZE, "%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, 0, &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 sprintf(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 = sprintf(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 wdack_show(struct gfs2_sbd *sdp, char *buf) 429 { 430 int val = completion_done(&sdp->sd_wdack) ? 1 : 0; 431 432 return sprintf(buf, "%d\n", val); 433 } 434 435 static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 436 { 437 int ret, val; 438 439 ret = kstrtoint(buf, 0, &val); 440 if (ret) 441 return ret; 442 443 if ((val == 1) && 444 !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm")) 445 complete(&sdp->sd_wdack); 446 else 447 return -EINVAL; 448 return len; 449 } 450 451 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) 452 { 453 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 454 return sprintf(buf, "%d\n", ls->ls_first); 455 } 456 457 static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 458 { 459 unsigned first; 460 int rv; 461 462 rv = sscanf(buf, "%u", &first); 463 if (rv != 1 || first > 1) 464 return -EINVAL; 465 rv = wait_for_completion_killable(&sdp->sd_locking_init); 466 if (rv) 467 return rv; 468 spin_lock(&sdp->sd_jindex_spin); 469 rv = -EBUSY; 470 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) 471 goto out; 472 rv = -EINVAL; 473 if (sdp->sd_args.ar_spectator) 474 goto out; 475 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) 476 goto out; 477 sdp->sd_lockstruct.ls_first = first; 478 rv = 0; 479 out: 480 spin_unlock(&sdp->sd_jindex_spin); 481 return rv ? rv : len; 482 } 483 484 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) 485 { 486 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 487 return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags)); 488 } 489 490 int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid) 491 { 492 struct gfs2_jdesc *jd; 493 int rv; 494 495 /* Wait for our primary journal to be initialized */ 496 wait_for_completion(&sdp->sd_journal_ready); 497 498 spin_lock(&sdp->sd_jindex_spin); 499 rv = -EBUSY; 500 /** 501 * If we're a spectator, we use journal0, but it's not really ours. 502 * So we need to wait for its recovery too. If we skip it we'd never 503 * queue work to the recovery workqueue, and so its completion would 504 * never clear the DFL_BLOCK_LOCKS flag, so all our locks would 505 * permanently stop working. 506 */ 507 if (!sdp->sd_jdesc) 508 goto out; 509 if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator) 510 goto out; 511 rv = -ENOENT; 512 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 513 if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator) 514 continue; 515 rv = gfs2_recover_journal(jd, false); 516 break; 517 } 518 out: 519 spin_unlock(&sdp->sd_jindex_spin); 520 return rv; 521 } 522 523 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 524 { 525 unsigned jid; 526 int rv; 527 528 rv = sscanf(buf, "%u", &jid); 529 if (rv != 1) 530 return -EINVAL; 531 532 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { 533 rv = -ESHUTDOWN; 534 goto out; 535 } 536 537 rv = gfs2_recover_set(sdp, jid); 538 out: 539 return rv ? rv : len; 540 } 541 542 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) 543 { 544 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 545 return sprintf(buf, "%d\n", ls->ls_recover_jid_done); 546 } 547 548 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) 549 { 550 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 551 return sprintf(buf, "%d\n", ls->ls_recover_jid_status); 552 } 553 554 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) 555 { 556 return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); 557 } 558 559 static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 560 { 561 int jid; 562 int rv; 563 564 rv = sscanf(buf, "%d", &jid); 565 if (rv != 1) 566 return -EINVAL; 567 rv = wait_for_completion_killable(&sdp->sd_locking_init); 568 if (rv) 569 return rv; 570 spin_lock(&sdp->sd_jindex_spin); 571 rv = -EINVAL; 572 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) 573 goto out; 574 rv = -EBUSY; 575 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) 576 goto out; 577 rv = 0; 578 if (sdp->sd_args.ar_spectator && jid > 0) 579 rv = jid = -EINVAL; 580 sdp->sd_lockstruct.ls_jid = jid; 581 clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); 582 smp_mb__after_atomic(); 583 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); 584 out: 585 spin_unlock(&sdp->sd_jindex_spin); 586 return rv ? rv : len; 587 } 588 589 #define GDLM_ATTR(_name,_mode,_show,_store) \ 590 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) 591 592 GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); 593 GDLM_ATTR(block, 0644, block_show, block_store); 594 GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store); 595 GDLM_ATTR(jid, 0644, jid_show, jid_store); 596 GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); 597 GDLM_ATTR(first_done, 0444, first_done_show, NULL); 598 GDLM_ATTR(recover, 0600, NULL, recover_store); 599 GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); 600 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); 601 602 static struct attribute *lock_module_attrs[] = { 603 &gdlm_attr_proto_name.attr, 604 &gdlm_attr_block.attr, 605 &gdlm_attr_withdraw.attr, 606 &gdlm_attr_jid.attr, 607 &gdlm_attr_first.attr, 608 &gdlm_attr_first_done.attr, 609 &gdlm_attr_recover.attr, 610 &gdlm_attr_recover_done.attr, 611 &gdlm_attr_recover_status.attr, 612 NULL, 613 }; 614 615 /* 616 * get and set struct gfs2_tune fields 617 */ 618 619 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) 620 { 621 return snprintf(buf, PAGE_SIZE, "%u %u\n", 622 sdp->sd_tune.gt_quota_scale_num, 623 sdp->sd_tune.gt_quota_scale_den); 624 } 625 626 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, 627 size_t len) 628 { 629 struct gfs2_tune *gt = &sdp->sd_tune; 630 unsigned int x, y; 631 632 if (!capable(CAP_SYS_ADMIN)) 633 return -EPERM; 634 635 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) 636 return -EINVAL; 637 638 spin_lock(>->gt_spin); 639 gt->gt_quota_scale_num = x; 640 gt->gt_quota_scale_den = y; 641 spin_unlock(>->gt_spin); 642 return len; 643 } 644 645 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, 646 int check_zero, const char *buf, size_t len) 647 { 648 struct gfs2_tune *gt = &sdp->sd_tune; 649 unsigned int x; 650 int error; 651 652 if (!capable(CAP_SYS_ADMIN)) 653 return -EPERM; 654 655 error = kstrtouint(buf, 0, &x); 656 if (error) 657 return error; 658 659 if (check_zero && !x) 660 return -EINVAL; 661 662 spin_lock(>->gt_spin); 663 *field = x; 664 spin_unlock(>->gt_spin); 665 return len; 666 } 667 668 #define TUNE_ATTR_3(name, show, store) \ 669 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) 670 671 #define TUNE_ATTR_2(name, store) \ 672 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ 673 { \ 674 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ 675 } \ 676 TUNE_ATTR_3(name, name##_show, store) 677 678 #define TUNE_ATTR(name, check_zero) \ 679 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ 680 { \ 681 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ 682 } \ 683 TUNE_ATTR_2(name, name##_store) 684 685 TUNE_ATTR(quota_warn_period, 0); 686 TUNE_ATTR(quota_quantum, 0); 687 TUNE_ATTR(max_readahead, 0); 688 TUNE_ATTR(complain_secs, 0); 689 TUNE_ATTR(statfs_slow, 0); 690 TUNE_ATTR(new_files_jdata, 0); 691 TUNE_ATTR(statfs_quantum, 1); 692 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); 693 694 static struct attribute *tune_attrs[] = { 695 &tune_attr_quota_warn_period.attr, 696 &tune_attr_quota_quantum.attr, 697 &tune_attr_max_readahead.attr, 698 &tune_attr_complain_secs.attr, 699 &tune_attr_statfs_slow.attr, 700 &tune_attr_statfs_quantum.attr, 701 &tune_attr_quota_scale.attr, 702 &tune_attr_new_files_jdata.attr, 703 NULL, 704 }; 705 706 static const struct attribute_group tune_group = { 707 .name = "tune", 708 .attrs = tune_attrs, 709 }; 710 711 static const struct attribute_group lock_module_group = { 712 .name = "lock_module", 713 .attrs = lock_module_attrs, 714 }; 715 716 int gfs2_sys_fs_add(struct gfs2_sbd *sdp) 717 { 718 struct super_block *sb = sdp->sd_vfs; 719 int error; 720 char ro[20]; 721 char spectator[20]; 722 char *envp[] = { ro, spectator, NULL }; 723 724 sprintf(ro, "RDONLY=%d", sb_rdonly(sb)); 725 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); 726 727 init_completion(&sdp->sd_kobj_unregister); 728 sdp->sd_kobj.kset = gfs2_kset; 729 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, 730 "%s", sdp->sd_table_name); 731 if (error) 732 goto fail_reg; 733 734 error = sysfs_create_group(&sdp->sd_kobj, &tune_group); 735 if (error) 736 goto fail_reg; 737 738 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); 739 if (error) 740 goto fail_tune; 741 742 error = sysfs_create_link(&sdp->sd_kobj, 743 &disk_to_dev(sb->s_bdev->bd_disk)->kobj, 744 "device"); 745 if (error) 746 goto fail_lock_module; 747 748 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); 749 return 0; 750 751 fail_lock_module: 752 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); 753 fail_tune: 754 sysfs_remove_group(&sdp->sd_kobj, &tune_group); 755 fail_reg: 756 fs_err(sdp, "error %d adding sysfs files\n", error); 757 kobject_put(&sdp->sd_kobj); 758 wait_for_completion(&sdp->sd_kobj_unregister); 759 sb->s_fs_info = NULL; 760 return error; 761 } 762 763 void gfs2_sys_fs_del(struct gfs2_sbd *sdp) 764 { 765 sysfs_remove_link(&sdp->sd_kobj, "device"); 766 sysfs_remove_group(&sdp->sd_kobj, &tune_group); 767 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); 768 kobject_put(&sdp->sd_kobj); 769 wait_for_completion(&sdp->sd_kobj_unregister); 770 } 771 772 static int gfs2_uevent(const struct kobject *kobj, struct kobj_uevent_env *env) 773 { 774 const struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); 775 const struct super_block *s = sdp->sd_vfs; 776 777 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); 778 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); 779 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) 780 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); 781 if (!uuid_is_null(&s->s_uuid)) 782 add_uevent_var(env, "UUID=%pUB", &s->s_uuid); 783 return 0; 784 } 785 786 static const struct kset_uevent_ops gfs2_uevent_ops = { 787 .uevent = gfs2_uevent, 788 }; 789 790 int gfs2_sys_init(void) 791 { 792 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); 793 if (!gfs2_kset) 794 return -ENOMEM; 795 return 0; 796 } 797 798 void gfs2_sys_uninit(void) 799 { 800 kset_unregister(gfs2_kset); 801 } 802 803