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PAGE_SIZE, 72 "Journal Checked: %d\n" 73 "Journal Live: %d\n" 74 "Journal ID: %d\n" 75 "Spectator: %d\n" 76 "Withdrawn: %d\n" 77 "No barriers: %d\n" 78 "No recovery: %d\n" 79 "Demote: %d\n" 80 "No Journal ID: %d\n" 81 "Mounted RO: %d\n" 82 "RO Recovery: %d\n" 83 "Skip DLM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 Freeze Initiator: %d\n" 86 "FS Frozen: %d\n" 87 "Withdrawing: %d\n" 88 "Withdraw In Prog: %d\n" 89 "Remote Withdraw: %d\n" 90 "Withdraw Recovery: %d\n" 91 "Deactivating: %d\n" 92 "sd_log_error: %d\n" 93 "sd_log_flush_lock: %d\n" 94 "sd_log_num_revoke: %u\n" 95 "sd_log_in_flight: %d\n" 96 "sd_log_blks_needed: %d\n" 97 "sd_log_blks_free: %d\n" 98 "sd_log_flush_head: %d\n" 99 "sd_log_flush_tail: %d\n" 100 "sd_log_blks_reserved: %d\n" 101 "sd_log_revokes_available: %d\n", 102 test_bit(SDF_JOURNAL_CHECKED, &f), 103 test_bit(SDF_JOURNAL_LIVE, &f), 104 (sdp->sd_jdesc ? sdp->sd_jdesc->jd_jid : 0), 105 (sdp->sd_args.ar_spectator ? 1 : 0), 106 test_bit(SDF_WITHDRAWN, &f), 107 test_bit(SDF_NOBARRIERS, &f), 108 test_bit(SDF_NORECOVERY, &f), 109 test_bit(SDF_DEMOTE, &f), 110 test_bit(SDF_NOJOURNALID, &f), 111 (sb_rdonly(sdp->sd_vfs) ? 1 : 0), 112 test_bit(SDF_RORECOVERY, &f), 113 test_bit(SDF_SKIP_DLM_UNLOCK, &f), 114 test_bit(SDF_FORCE_AIL_FLUSH, &f), 115 test_bit(SDF_FREEZE_INITIATOR, &f), 116 test_bit(SDF_FROZEN, &f), 117 test_bit(SDF_WITHDRAWING, &f), 118 test_bit(SDF_WITHDRAW_IN_PROG, &f), 119 test_bit(SDF_REMOTE_WITHDRAW, &f), 120 test_bit(SDF_WITHDRAW_RECOVERY, &f), 121 test_bit(SDF_DEACTIVATING, &f), 122 sdp->sd_log_error, 123 rwsem_is_locked(&sdp->sd_log_flush_lock), 124 sdp->sd_log_num_revoke, 125 atomic_read(&sdp->sd_log_in_flight), 126 atomic_read(&sdp->sd_log_blks_needed), 127 atomic_read(&sdp->sd_log_blks_free), 128 sdp->sd_log_flush_head, 129 sdp->sd_log_flush_tail, 130 sdp->sd_log_blks_reserved, 131 atomic_read(&sdp->sd_log_revokes_available)); 132 return s; 133 } 134 135 static ssize_t fsname_show(struct gfs2_sbd *sdp, char *buf) 136 { 137 return snprintf(buf, PAGE_SIZE, "%s\n", sdp->sd_fsname); 138 } 139 140 static ssize_t uuid_show(struct gfs2_sbd *sdp, char *buf) 141 { 142 struct super_block *s = sdp->sd_vfs; 143 144 buf[0] = '\0'; 145 if (uuid_is_null(&s->s_uuid)) 146 return 0; 147 return snprintf(buf, PAGE_SIZE, "%pUB\n", &s->s_uuid); 148 } 149 150 static ssize_t freeze_show(struct gfs2_sbd *sdp, char *buf) 151 { 152 struct super_block *sb = sdp->sd_vfs; 153 int frozen = (sb->s_writers.frozen == SB_UNFROZEN) ? 0 : 1; 154 155 return snprintf(buf, PAGE_SIZE, "%d\n", frozen); 156 } 157 158 static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 159 { 160 int error, n; 161 162 error = kstrtoint(buf, 0, &n); 163 if (error) 164 return error; 165 166 if (!capable(CAP_SYS_ADMIN)) 167 return -EPERM; 168 169 switch (n) { 170 case 0: 171 error = thaw_super(sdp->sd_vfs); 172 break; 173 case 1: 174 error = freeze_super(sdp->sd_vfs); 175 break; 176 default: 177 return -EINVAL; 178 } 179 180 if (error) { 181 fs_warn(sdp, "freeze %d error %d\n", n, error); 182 return error; 183 } 184 185 return len; 186 } 187 188 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf) 189 { 190 unsigned int b = gfs2_withdrawn(sdp); 191 return snprintf(buf, PAGE_SIZE, "%u\n", b); 192 } 193 194 static ssize_t withdraw_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 195 { 196 int error, val; 197 198 if (!capable(CAP_SYS_ADMIN)) 199 return -EPERM; 200 201 error = kstrtoint(buf, 0, &val); 202 if (error) 203 return error; 204 205 if (val != 1) 206 return -EINVAL; 207 208 gfs2_lm(sdp, "withdrawing from cluster at user's request\n"); 209 gfs2_withdraw(sdp); 210 211 return len; 212 } 213 214 static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf, 215 size_t len) 216 { 217 int error, val; 218 219 if (!capable(CAP_SYS_ADMIN)) 220 return -EPERM; 221 222 error = kstrtoint(buf, 0, &val); 223 if (error) 224 return error; 225 226 if (val != 1) 227 return -EINVAL; 228 229 gfs2_statfs_sync(sdp->sd_vfs, 0); 230 return len; 231 } 232 233 static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf, 234 size_t len) 235 { 236 int error, val; 237 238 if (!capable(CAP_SYS_ADMIN)) 239 return -EPERM; 240 241 error = kstrtoint(buf, 0, &val); 242 if (error) 243 return error; 244 245 if (val != 1) 246 return -EINVAL; 247 248 gfs2_quota_sync(sdp->sd_vfs, 0); 249 return len; 250 } 251 252 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf, 253 size_t len) 254 { 255 struct kqid qid; 256 int error; 257 u32 id; 258 259 if (!capable(CAP_SYS_ADMIN)) 260 return -EPERM; 261 262 error = kstrtou32(buf, 0, &id); 263 if (error) 264 return error; 265 266 qid = make_kqid(current_user_ns(), USRQUOTA, id); 267 if (!qid_valid(qid)) 268 return -EINVAL; 269 270 error = gfs2_quota_refresh(sdp, qid); 271 return error ? error : len; 272 } 273 274 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf, 275 size_t len) 276 { 277 struct kqid qid; 278 int error; 279 u32 id; 280 281 if (!capable(CAP_SYS_ADMIN)) 282 return -EPERM; 283 284 error = kstrtou32(buf, 0, &id); 285 if (error) 286 return error; 287 288 qid = make_kqid(current_user_ns(), GRPQUOTA, id); 289 if (!qid_valid(qid)) 290 return -EINVAL; 291 292 error = gfs2_quota_refresh(sdp, qid); 293 return error ? error : len; 294 } 295 296 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 297 { 298 struct gfs2_glock *gl; 299 const struct gfs2_glock_operations *glops; 300 unsigned int glmode; 301 unsigned int gltype; 302 unsigned long long glnum; 303 char mode[16]; 304 int rv; 305 306 if (!capable(CAP_SYS_ADMIN)) 307 return -EPERM; 308 309 rv = sscanf(buf, "%u:%llu %15s", &gltype, &glnum, 310 mode); 311 if (rv != 3) 312 return -EINVAL; 313 314 if (strcmp(mode, "EX") == 0) 315 glmode = LM_ST_UNLOCKED; 316 else if ((strcmp(mode, "CW") == 0) || (strcmp(mode, "DF") == 0)) 317 glmode = LM_ST_DEFERRED; 318 else if ((strcmp(mode, "PR") == 0) || (strcmp(mode, "SH") == 0)) 319 glmode = LM_ST_SHARED; 320 else 321 return -EINVAL; 322 323 if (gltype > LM_TYPE_JOURNAL) 324 return -EINVAL; 325 if (gltype == LM_TYPE_NONDISK && glnum == GFS2_FREEZE_LOCK) 326 glops = &gfs2_freeze_glops; 327 else 328 glops = gfs2_glops_list[gltype]; 329 if (glops == NULL) 330 return -EINVAL; 331 if (!test_and_set_bit(SDF_DEMOTE, &sdp->sd_flags)) 332 fs_info(sdp, "demote interface used\n"); 333 rv = gfs2_glock_get(sdp, glnum, glops, 0, &gl); 334 if (rv) 335 return rv; 336 gfs2_glock_cb(gl, glmode); 337 gfs2_glock_put(gl); 338 return len; 339 } 340 341 342 #define GFS2_ATTR(name, mode, show, store) \ 343 static struct gfs2_attr gfs2_attr_##name = __ATTR(name, mode, show, store) 344 345 GFS2_ATTR(id, 0444, id_show, NULL); 346 GFS2_ATTR(fsname, 0444, fsname_show, NULL); 347 GFS2_ATTR(uuid, 0444, uuid_show, NULL); 348 GFS2_ATTR(freeze, 0644, freeze_show, freeze_store); 349 GFS2_ATTR(withdraw, 0644, withdraw_show, withdraw_store); 350 GFS2_ATTR(statfs_sync, 0200, NULL, statfs_sync_store); 351 GFS2_ATTR(quota_sync, 0200, NULL, quota_sync_store); 352 GFS2_ATTR(quota_refresh_user, 0200, NULL, quota_refresh_user_store); 353 GFS2_ATTR(quota_refresh_group, 0200, NULL, quota_refresh_group_store); 354 GFS2_ATTR(demote_rq, 0200, NULL, demote_rq_store); 355 GFS2_ATTR(status, 0400, status_show, NULL); 356 357 static struct attribute *gfs2_attrs[] = { 358 &gfs2_attr_id.attr, 359 &gfs2_attr_fsname.attr, 360 &gfs2_attr_uuid.attr, 361 &gfs2_attr_freeze.attr, 362 &gfs2_attr_withdraw.attr, 363 &gfs2_attr_statfs_sync.attr, 364 &gfs2_attr_quota_sync.attr, 365 &gfs2_attr_quota_refresh_user.attr, 366 &gfs2_attr_quota_refresh_group.attr, 367 &gfs2_attr_demote_rq.attr, 368 &gfs2_attr_status.attr, 369 NULL, 370 }; 371 ATTRIBUTE_GROUPS(gfs2); 372 373 static void gfs2_sbd_release(struct kobject *kobj) 374 { 375 struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); 376 377 complete(&sdp->sd_kobj_unregister); 378 } 379 380 static struct kobj_type gfs2_ktype = { 381 .release = gfs2_sbd_release, 382 .default_groups = gfs2_groups, 383 .sysfs_ops = &gfs2_attr_ops, 384 }; 385 386 387 /* 388 * lock_module. Originally from lock_dlm 389 */ 390 391 static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf) 392 { 393 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops; 394 return sprintf(buf, "%s\n", ops->lm_proto_name); 395 } 396 397 static ssize_t block_show(struct gfs2_sbd *sdp, char *buf) 398 { 399 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 400 ssize_t ret; 401 int val = 0; 402 403 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags)) 404 val = 1; 405 ret = sprintf(buf, "%d\n", val); 406 return ret; 407 } 408 409 static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 410 { 411 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 412 int ret, val; 413 414 ret = kstrtoint(buf, 0, &val); 415 if (ret) 416 return ret; 417 418 if (val == 1) 419 set_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); 420 else if (val == 0) { 421 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags); 422 smp_mb__after_atomic(); 423 gfs2_glock_thaw(sdp); 424 } else { 425 return -EINVAL; 426 } 427 return len; 428 } 429 430 static ssize_t wdack_show(struct gfs2_sbd *sdp, char *buf) 431 { 432 int val = completion_done(&sdp->sd_wdack) ? 1 : 0; 433 434 return sprintf(buf, "%d\n", val); 435 } 436 437 static ssize_t wdack_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 438 { 439 int ret, val; 440 441 ret = kstrtoint(buf, 0, &val); 442 if (ret) 443 return ret; 444 445 if ((val == 1) && 446 !strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm")) 447 complete(&sdp->sd_wdack); 448 else 449 return -EINVAL; 450 return len; 451 } 452 453 static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf) 454 { 455 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 456 return sprintf(buf, "%d\n", ls->ls_first); 457 } 458 459 static ssize_t lkfirst_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 460 { 461 unsigned first; 462 int rv; 463 464 rv = sscanf(buf, "%u", &first); 465 if (rv != 1 || first > 1) 466 return -EINVAL; 467 rv = wait_for_completion_killable(&sdp->sd_locking_init); 468 if (rv) 469 return rv; 470 spin_lock(&sdp->sd_jindex_spin); 471 rv = -EBUSY; 472 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) 473 goto out; 474 rv = -EINVAL; 475 if (sdp->sd_args.ar_spectator) 476 goto out; 477 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) 478 goto out; 479 sdp->sd_lockstruct.ls_first = first; 480 rv = 0; 481 out: 482 spin_unlock(&sdp->sd_jindex_spin); 483 return rv ? rv : len; 484 } 485 486 static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf) 487 { 488 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 489 return sprintf(buf, "%d\n", !!test_bit(DFL_FIRST_MOUNT_DONE, &ls->ls_recover_flags)); 490 } 491 492 int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid) 493 { 494 struct gfs2_jdesc *jd; 495 int rv; 496 497 /* Wait for our primary journal to be initialized */ 498 wait_for_completion(&sdp->sd_journal_ready); 499 500 spin_lock(&sdp->sd_jindex_spin); 501 rv = -EBUSY; 502 /** 503 * If we're a spectator, we use journal0, but it's not really ours. 504 * So we need to wait for its recovery too. If we skip it we'd never 505 * queue work to the recovery workqueue, and so its completion would 506 * never clear the DFL_BLOCK_LOCKS flag, so all our locks would 507 * permanently stop working. 508 */ 509 if (!sdp->sd_jdesc) 510 goto out; 511 if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator) 512 goto out; 513 rv = -ENOENT; 514 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { 515 if (jd->jd_jid != jid && !sdp->sd_args.ar_spectator) 516 continue; 517 rv = gfs2_recover_journal(jd, false); 518 break; 519 } 520 out: 521 spin_unlock(&sdp->sd_jindex_spin); 522 return rv; 523 } 524 525 static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 526 { 527 unsigned jid; 528 int rv; 529 530 rv = sscanf(buf, "%u", &jid); 531 if (rv != 1) 532 return -EINVAL; 533 534 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags)) { 535 rv = -ESHUTDOWN; 536 goto out; 537 } 538 539 rv = gfs2_recover_set(sdp, jid); 540 out: 541 return rv ? rv : len; 542 } 543 544 static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf) 545 { 546 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 547 return sprintf(buf, "%d\n", ls->ls_recover_jid_done); 548 } 549 550 static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf) 551 { 552 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 553 return sprintf(buf, "%d\n", ls->ls_recover_jid_status); 554 } 555 556 static ssize_t jid_show(struct gfs2_sbd *sdp, char *buf) 557 { 558 return sprintf(buf, "%d\n", sdp->sd_lockstruct.ls_jid); 559 } 560 561 static ssize_t jid_store(struct gfs2_sbd *sdp, const char *buf, size_t len) 562 { 563 int jid; 564 int rv; 565 566 rv = sscanf(buf, "%d", &jid); 567 if (rv != 1) 568 return -EINVAL; 569 rv = wait_for_completion_killable(&sdp->sd_locking_init); 570 if (rv) 571 return rv; 572 spin_lock(&sdp->sd_jindex_spin); 573 rv = -EINVAL; 574 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) 575 goto out; 576 rv = -EBUSY; 577 if (test_bit(SDF_NOJOURNALID, &sdp->sd_flags) == 0) 578 goto out; 579 rv = 0; 580 if (sdp->sd_args.ar_spectator && jid > 0) 581 rv = jid = -EINVAL; 582 sdp->sd_lockstruct.ls_jid = jid; 583 clear_bit(SDF_NOJOURNALID, &sdp->sd_flags); 584 smp_mb__after_atomic(); 585 wake_up_bit(&sdp->sd_flags, SDF_NOJOURNALID); 586 out: 587 spin_unlock(&sdp->sd_jindex_spin); 588 return rv ? rv : len; 589 } 590 591 #define GDLM_ATTR(_name,_mode,_show,_store) \ 592 static struct gfs2_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store) 593 594 GDLM_ATTR(proto_name, 0444, proto_name_show, NULL); 595 GDLM_ATTR(block, 0644, block_show, block_store); 596 GDLM_ATTR(withdraw, 0644, wdack_show, wdack_store); 597 GDLM_ATTR(jid, 0644, jid_show, jid_store); 598 GDLM_ATTR(first, 0644, lkfirst_show, lkfirst_store); 599 GDLM_ATTR(first_done, 0444, first_done_show, NULL); 600 GDLM_ATTR(recover, 0600, NULL, recover_store); 601 GDLM_ATTR(recover_done, 0444, recover_done_show, NULL); 602 GDLM_ATTR(recover_status, 0444, recover_status_show, NULL); 603 604 static struct attribute *lock_module_attrs[] = { 605 &gdlm_attr_proto_name.attr, 606 &gdlm_attr_block.attr, 607 &gdlm_attr_withdraw.attr, 608 &gdlm_attr_jid.attr, 609 &gdlm_attr_first.attr, 610 &gdlm_attr_first_done.attr, 611 &gdlm_attr_recover.attr, 612 &gdlm_attr_recover_done.attr, 613 &gdlm_attr_recover_status.attr, 614 NULL, 615 }; 616 617 /* 618 * get and set struct gfs2_tune fields 619 */ 620 621 static ssize_t quota_scale_show(struct gfs2_sbd *sdp, char *buf) 622 { 623 return snprintf(buf, PAGE_SIZE, "%u %u\n", 624 sdp->sd_tune.gt_quota_scale_num, 625 sdp->sd_tune.gt_quota_scale_den); 626 } 627 628 static ssize_t quota_scale_store(struct gfs2_sbd *sdp, const char *buf, 629 size_t len) 630 { 631 struct gfs2_tune *gt = &sdp->sd_tune; 632 unsigned int x, y; 633 634 if (!capable(CAP_SYS_ADMIN)) 635 return -EPERM; 636 637 if (sscanf(buf, "%u %u", &x, &y) != 2 || !y) 638 return -EINVAL; 639 640 spin_lock(>->gt_spin); 641 gt->gt_quota_scale_num = x; 642 gt->gt_quota_scale_den = y; 643 spin_unlock(>->gt_spin); 644 return len; 645 } 646 647 static ssize_t tune_set(struct gfs2_sbd *sdp, unsigned int *field, 648 int check_zero, const char *buf, size_t len) 649 { 650 struct gfs2_tune *gt = &sdp->sd_tune; 651 unsigned int x; 652 int error; 653 654 if (!capable(CAP_SYS_ADMIN)) 655 return -EPERM; 656 657 error = kstrtouint(buf, 0, &x); 658 if (error) 659 return error; 660 661 if (check_zero && !x) 662 return -EINVAL; 663 664 spin_lock(>->gt_spin); 665 *field = x; 666 spin_unlock(>->gt_spin); 667 return len; 668 } 669 670 #define TUNE_ATTR_3(name, show, store) \ 671 static struct gfs2_attr tune_attr_##name = __ATTR(name, 0644, show, store) 672 673 #define TUNE_ATTR_2(name, store) \ 674 static ssize_t name##_show(struct gfs2_sbd *sdp, char *buf) \ 675 { \ 676 return snprintf(buf, PAGE_SIZE, "%u\n", sdp->sd_tune.gt_##name); \ 677 } \ 678 TUNE_ATTR_3(name, name##_show, store) 679 680 #define TUNE_ATTR(name, check_zero) \ 681 static ssize_t name##_store(struct gfs2_sbd *sdp, const char *buf, size_t len)\ 682 { \ 683 return tune_set(sdp, &sdp->sd_tune.gt_##name, check_zero, buf, len); \ 684 } \ 685 TUNE_ATTR_2(name, name##_store) 686 687 TUNE_ATTR(quota_warn_period, 0); 688 TUNE_ATTR(quota_quantum, 0); 689 TUNE_ATTR(max_readahead, 0); 690 TUNE_ATTR(complain_secs, 0); 691 TUNE_ATTR(statfs_slow, 0); 692 TUNE_ATTR(new_files_jdata, 0); 693 TUNE_ATTR(statfs_quantum, 1); 694 TUNE_ATTR_3(quota_scale, quota_scale_show, quota_scale_store); 695 696 static struct attribute *tune_attrs[] = { 697 &tune_attr_quota_warn_period.attr, 698 &tune_attr_quota_quantum.attr, 699 &tune_attr_max_readahead.attr, 700 &tune_attr_complain_secs.attr, 701 &tune_attr_statfs_slow.attr, 702 &tune_attr_statfs_quantum.attr, 703 &tune_attr_quota_scale.attr, 704 &tune_attr_new_files_jdata.attr, 705 NULL, 706 }; 707 708 static const struct attribute_group tune_group = { 709 .name = "tune", 710 .attrs = tune_attrs, 711 }; 712 713 static const struct attribute_group lock_module_group = { 714 .name = "lock_module", 715 .attrs = lock_module_attrs, 716 }; 717 718 int gfs2_sys_fs_add(struct gfs2_sbd *sdp) 719 { 720 struct super_block *sb = sdp->sd_vfs; 721 int error; 722 char ro[20]; 723 char spectator[20]; 724 char *envp[] = { ro, spectator, NULL }; 725 726 sprintf(ro, "RDONLY=%d", sb_rdonly(sb)); 727 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); 728 729 init_completion(&sdp->sd_kobj_unregister); 730 sdp->sd_kobj.kset = gfs2_kset; 731 error = kobject_init_and_add(&sdp->sd_kobj, &gfs2_ktype, NULL, 732 "%s", sdp->sd_table_name); 733 if (error) 734 goto fail_reg; 735 736 error = sysfs_create_group(&sdp->sd_kobj, &tune_group); 737 if (error) 738 goto fail_reg; 739 740 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group); 741 if (error) 742 goto fail_tune; 743 744 error = sysfs_create_link(&sdp->sd_kobj, 745 &disk_to_dev(sb->s_bdev->bd_disk)->kobj, 746 "device"); 747 if (error) 748 goto fail_lock_module; 749 750 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ADD, envp); 751 return 0; 752 753 fail_lock_module: 754 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); 755 fail_tune: 756 sysfs_remove_group(&sdp->sd_kobj, &tune_group); 757 fail_reg: 758 fs_err(sdp, "error %d adding sysfs files\n", error); 759 kobject_put(&sdp->sd_kobj); 760 wait_for_completion(&sdp->sd_kobj_unregister); 761 sb->s_fs_info = NULL; 762 return error; 763 } 764 765 void gfs2_sys_fs_del(struct gfs2_sbd *sdp) 766 { 767 sysfs_remove_link(&sdp->sd_kobj, "device"); 768 sysfs_remove_group(&sdp->sd_kobj, &tune_group); 769 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group); 770 kobject_put(&sdp->sd_kobj); 771 wait_for_completion(&sdp->sd_kobj_unregister); 772 } 773 774 static int gfs2_uevent(const struct kobject *kobj, struct kobj_uevent_env *env) 775 { 776 const struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj); 777 const struct super_block *s = sdp->sd_vfs; 778 779 add_uevent_var(env, "LOCKTABLE=%s", sdp->sd_table_name); 780 add_uevent_var(env, "LOCKPROTO=%s", sdp->sd_proto_name); 781 if (!test_bit(SDF_NOJOURNALID, &sdp->sd_flags)) 782 add_uevent_var(env, "JOURNALID=%d", sdp->sd_lockstruct.ls_jid); 783 if (!uuid_is_null(&s->s_uuid)) 784 add_uevent_var(env, "UUID=%pUB", &s->s_uuid); 785 return 0; 786 } 787 788 static const struct kset_uevent_ops gfs2_uevent_ops = { 789 .uevent = gfs2_uevent, 790 }; 791 792 int gfs2_sys_init(void) 793 { 794 gfs2_kset = kset_create_and_add("gfs2", &gfs2_uevent_ops, fs_kobj); 795 if (!gfs2_kset) 796 return -ENOMEM; 797 return 0; 798 } 799 800 void gfs2_sys_uninit(void) 801 { 802 kset_unregister(gfs2_kset); 803 } 804 805