1// SPDX-License-Identifier: GPL-2.0 2#ifndef NO_BCACHEFS_CHARDEV 3 4#include "bcachefs.h" 5#include "bcachefs_ioctl.h" 6#include "buckets.h" 7#include "chardev.h" 8#include "journal.h" 9#include "move.h" 10#include "recovery_passes.h" 11#include "replicas.h" 12#include "super.h" 13#include "super-io.h" 14#include "thread_with_file.h" 15 16#include <linux/cdev.h> 17#include <linux/device.h> 18#include <linux/fs.h> 19#include <linux/ioctl.h> 20#include <linux/major.h> 21#include <linux/sched/task.h> 22#include <linux/slab.h> 23#include <linux/uaccess.h> 24 25/* returns with ref on ca->ref */ 26static struct bch_dev *bch2_device_lookup(struct bch_fs *c, u64 dev, 27 unsigned flags) 28{ 29 struct bch_dev *ca; 30 31 if (flags & BCH_BY_INDEX) { 32 if (dev >= c->sb.nr_devices) 33 return ERR_PTR(-EINVAL); 34 35 rcu_read_lock(); 36 ca = rcu_dereference(c->devs[dev]); 37 if (ca) 38 percpu_ref_get(&ca->ref); 39 rcu_read_unlock(); 40 41 if (!ca) 42 return ERR_PTR(-EINVAL); 43 } else { 44 char *path; 45 46 path = strndup_user((const char __user *) 47 (unsigned long) dev, PATH_MAX); 48 if (IS_ERR(path)) 49 return ERR_CAST(path); 50 51 ca = bch2_dev_lookup(c, path); 52 kfree(path); 53 } 54 55 return ca; 56} 57 58#if 0 59static long bch2_ioctl_assemble(struct bch_ioctl_assemble __user *user_arg) 60{ 61 struct bch_ioctl_assemble arg; 62 struct bch_fs *c; 63 u64 *user_devs = NULL; 64 char **devs = NULL; 65 unsigned i; 66 int ret = -EFAULT; 67 68 if (copy_from_user(&arg, user_arg, sizeof(arg))) 69 return -EFAULT; 70 71 if (arg.flags || arg.pad) 72 return -EINVAL; 73 74 user_devs = kmalloc_array(arg.nr_devs, sizeof(u64), GFP_KERNEL); 75 if (!user_devs) 76 return -ENOMEM; 77 78 devs = kcalloc(arg.nr_devs, sizeof(char *), GFP_KERNEL); 79 80 if (copy_from_user(user_devs, user_arg->devs, 81 sizeof(u64) * arg.nr_devs)) 82 goto err; 83 84 for (i = 0; i < arg.nr_devs; i++) { 85 devs[i] = strndup_user((const char __user *)(unsigned long) 86 user_devs[i], 87 PATH_MAX); 88 ret= PTR_ERR_OR_ZERO(devs[i]); 89 if (ret) 90 goto err; 91 } 92 93 c = bch2_fs_open(devs, arg.nr_devs, bch2_opts_empty()); 94 ret = PTR_ERR_OR_ZERO(c); 95 if (!ret) 96 closure_put(&c->cl); 97err: 98 if (devs) 99 for (i = 0; i < arg.nr_devs; i++) 100 kfree(devs[i]); 101 kfree(devs); 102 return ret; 103} 104 105static long bch2_ioctl_incremental(struct bch_ioctl_incremental __user *user_arg) 106{ 107 struct bch_ioctl_incremental arg; 108 const char *err; 109 char *path; 110 111 if (copy_from_user(&arg, user_arg, sizeof(arg))) 112 return -EFAULT; 113 114 if (arg.flags || arg.pad) 115 return -EINVAL; 116 117 path = strndup_user((const char __user *)(unsigned long) arg.dev, PATH_MAX); 118 ret = PTR_ERR_OR_ZERO(path); 119 if (ret) 120 return ret; 121 122 err = bch2_fs_open_incremental(path); 123 kfree(path); 124 125 if (err) { 126 pr_err("Could not register bcachefs devices: %s", err); 127 return -EINVAL; 128 } 129 130 return 0; 131} 132#endif 133 134struct fsck_thread { 135 struct thread_with_stdio thr; 136 struct bch_fs *c; 137 struct bch_opts opts; 138}; 139 140static void bch2_fsck_thread_exit(struct thread_with_stdio *_thr) 141{ 142 struct fsck_thread *thr = container_of(_thr, struct fsck_thread, thr); 143 kfree(thr); 144} 145 146static int bch2_fsck_offline_thread_fn(struct thread_with_stdio *stdio) 147{ 148 struct fsck_thread *thr = container_of(stdio, struct fsck_thread, thr); 149 struct bch_fs *c = thr->c; 150 151 int ret = PTR_ERR_OR_ZERO(c); 152 if (ret) 153 return ret; 154 155 ret = bch2_fs_start(thr->c); 156 if (ret) 157 goto err; 158 159 if (test_bit(BCH_FS_errors_fixed, &c->flags)) { 160 bch2_stdio_redirect_printf(&stdio->stdio, false, "%s: errors fixed\n", c->name); 161 ret |= 1; 162 } 163 if (test_bit(BCH_FS_error, &c->flags)) { 164 bch2_stdio_redirect_printf(&stdio->stdio, false, "%s: still has errors\n", c->name); 165 ret |= 4; 166 } 167err: 168 bch2_fs_stop(c); 169 return ret; 170} 171 172static const struct thread_with_stdio_ops bch2_offline_fsck_ops = { 173 .exit = bch2_fsck_thread_exit, 174 .fn = bch2_fsck_offline_thread_fn, 175}; 176 177static long bch2_ioctl_fsck_offline(struct bch_ioctl_fsck_offline __user *user_arg) 178{ 179 struct bch_ioctl_fsck_offline arg; 180 struct fsck_thread *thr = NULL; 181 darray_str(devs) = {}; 182 long ret = 0; 183 184 if (copy_from_user(&arg, user_arg, sizeof(arg))) 185 return -EFAULT; 186 187 if (arg.flags) 188 return -EINVAL; 189 190 if (!capable(CAP_SYS_ADMIN)) 191 return -EPERM; 192 193 for (size_t i = 0; i < arg.nr_devs; i++) { 194 u64 dev_u64; 195 ret = copy_from_user_errcode(&dev_u64, &user_arg->devs[i], sizeof(u64)); 196 if (ret) 197 goto err; 198 199 char *dev_str = strndup_user((char __user *)(unsigned long) dev_u64, PATH_MAX); 200 ret = PTR_ERR_OR_ZERO(dev_str); 201 if (ret) 202 goto err; 203 204 ret = darray_push(&devs, dev_str); 205 if (ret) { 206 kfree(dev_str); 207 goto err; 208 } 209 } 210 211 thr = kzalloc(sizeof(*thr), GFP_KERNEL); 212 if (!thr) { 213 ret = -ENOMEM; 214 goto err; 215 } 216 217 thr->opts = bch2_opts_empty(); 218 219 if (arg.opts) { 220 char *optstr = strndup_user((char __user *)(unsigned long) arg.opts, 1 << 16); 221 222 ret = PTR_ERR_OR_ZERO(optstr) ?: 223 bch2_parse_mount_opts(NULL, &thr->opts, optstr); 224 kfree(optstr); 225 226 if (ret) 227 goto err; 228 } 229 230 opt_set(thr->opts, stdio, (u64)(unsigned long)&thr->thr.stdio); 231 232 /* We need request_key() to be called before we punt to kthread: */ 233 opt_set(thr->opts, nostart, true); 234 235 bch2_thread_with_stdio_init(&thr->thr, &bch2_offline_fsck_ops); 236 237 thr->c = bch2_fs_open(devs.data, arg.nr_devs, thr->opts); 238 239 if (!IS_ERR(thr->c) && 240 thr->c->opts.errors == BCH_ON_ERROR_panic) 241 thr->c->opts.errors = BCH_ON_ERROR_ro; 242 243 ret = __bch2_run_thread_with_stdio(&thr->thr); 244out: 245 darray_for_each(devs, i) 246 kfree(*i); 247 darray_exit(&devs); 248 return ret; 249err: 250 if (thr) 251 bch2_fsck_thread_exit(&thr->thr); 252 pr_err("ret %s", bch2_err_str(ret)); 253 goto out; 254} 255 256static long bch2_global_ioctl(unsigned cmd, void __user *arg) 257{ 258 long ret; 259 260 switch (cmd) { 261#if 0 262 case BCH_IOCTL_ASSEMBLE: 263 return bch2_ioctl_assemble(arg); 264 case BCH_IOCTL_INCREMENTAL: 265 return bch2_ioctl_incremental(arg); 266#endif 267 case BCH_IOCTL_FSCK_OFFLINE: { 268 ret = bch2_ioctl_fsck_offline(arg); 269 break; 270 } 271 default: 272 ret = -ENOTTY; 273 break; 274 } 275 276 if (ret < 0) 277 ret = bch2_err_class(ret); 278 return ret; 279} 280 281static long bch2_ioctl_query_uuid(struct bch_fs *c, 282 struct bch_ioctl_query_uuid __user *user_arg) 283{ 284 return copy_to_user_errcode(&user_arg->uuid, &c->sb.user_uuid, 285 sizeof(c->sb.user_uuid)); 286} 287 288#if 0 289static long bch2_ioctl_start(struct bch_fs *c, struct bch_ioctl_start arg) 290{ 291 if (!capable(CAP_SYS_ADMIN)) 292 return -EPERM; 293 294 if (arg.flags || arg.pad) 295 return -EINVAL; 296 297 return bch2_fs_start(c); 298} 299 300static long bch2_ioctl_stop(struct bch_fs *c) 301{ 302 if (!capable(CAP_SYS_ADMIN)) 303 return -EPERM; 304 305 bch2_fs_stop(c); 306 return 0; 307} 308#endif 309 310static long bch2_ioctl_disk_add(struct bch_fs *c, struct bch_ioctl_disk arg) 311{ 312 char *path; 313 int ret; 314 315 if (!capable(CAP_SYS_ADMIN)) 316 return -EPERM; 317 318 if (arg.flags || arg.pad) 319 return -EINVAL; 320 321 path = strndup_user((const char __user *)(unsigned long) arg.dev, PATH_MAX); 322 ret = PTR_ERR_OR_ZERO(path); 323 if (ret) 324 return ret; 325 326 ret = bch2_dev_add(c, path); 327 kfree(path); 328 329 return ret; 330} 331 332static long bch2_ioctl_disk_remove(struct bch_fs *c, struct bch_ioctl_disk arg) 333{ 334 struct bch_dev *ca; 335 336 if (!capable(CAP_SYS_ADMIN)) 337 return -EPERM; 338 339 if ((arg.flags & ~(BCH_FORCE_IF_DATA_LOST| 340 BCH_FORCE_IF_METADATA_LOST| 341 BCH_FORCE_IF_DEGRADED| 342 BCH_BY_INDEX)) || 343 arg.pad) 344 return -EINVAL; 345 346 ca = bch2_device_lookup(c, arg.dev, arg.flags); 347 if (IS_ERR(ca)) 348 return PTR_ERR(ca); 349 350 return bch2_dev_remove(c, ca, arg.flags); 351} 352 353static long bch2_ioctl_disk_online(struct bch_fs *c, struct bch_ioctl_disk arg) 354{ 355 char *path; 356 int ret; 357 358 if (!capable(CAP_SYS_ADMIN)) 359 return -EPERM; 360 361 if (arg.flags || arg.pad) 362 return -EINVAL; 363 364 path = strndup_user((const char __user *)(unsigned long) arg.dev, PATH_MAX); 365 ret = PTR_ERR_OR_ZERO(path); 366 if (ret) 367 return ret; 368 369 ret = bch2_dev_online(c, path); 370 kfree(path); 371 return ret; 372} 373 374static long bch2_ioctl_disk_offline(struct bch_fs *c, struct bch_ioctl_disk arg) 375{ 376 struct bch_dev *ca; 377 int ret; 378 379 if (!capable(CAP_SYS_ADMIN)) 380 return -EPERM; 381 382 if ((arg.flags & ~(BCH_FORCE_IF_DATA_LOST| 383 BCH_FORCE_IF_METADATA_LOST| 384 BCH_FORCE_IF_DEGRADED| 385 BCH_BY_INDEX)) || 386 arg.pad) 387 return -EINVAL; 388 389 ca = bch2_device_lookup(c, arg.dev, arg.flags); 390 if (IS_ERR(ca)) 391 return PTR_ERR(ca); 392 393 ret = bch2_dev_offline(c, ca, arg.flags); 394 percpu_ref_put(&ca->ref); 395 return ret; 396} 397 398static long bch2_ioctl_disk_set_state(struct bch_fs *c, 399 struct bch_ioctl_disk_set_state arg) 400{ 401 struct bch_dev *ca; 402 int ret; 403 404 if (!capable(CAP_SYS_ADMIN)) 405 return -EPERM; 406 407 if ((arg.flags & ~(BCH_FORCE_IF_DATA_LOST| 408 BCH_FORCE_IF_METADATA_LOST| 409 BCH_FORCE_IF_DEGRADED| 410 BCH_BY_INDEX)) || 411 arg.pad[0] || arg.pad[1] || arg.pad[2] || 412 arg.new_state >= BCH_MEMBER_STATE_NR) 413 return -EINVAL; 414 415 ca = bch2_device_lookup(c, arg.dev, arg.flags); 416 if (IS_ERR(ca)) 417 return PTR_ERR(ca); 418 419 ret = bch2_dev_set_state(c, ca, arg.new_state, arg.flags); 420 if (ret) 421 bch_err(c, "Error setting device state: %s", bch2_err_str(ret)); 422 423 percpu_ref_put(&ca->ref); 424 return ret; 425} 426 427struct bch_data_ctx { 428 struct thread_with_file thr; 429 430 struct bch_fs *c; 431 struct bch_ioctl_data arg; 432 struct bch_move_stats stats; 433}; 434 435static int bch2_data_thread(void *arg) 436{ 437 struct bch_data_ctx *ctx = container_of(arg, struct bch_data_ctx, thr); 438 439 ctx->thr.ret = bch2_data_job(ctx->c, &ctx->stats, ctx->arg); 440 ctx->stats.data_type = U8_MAX; 441 return 0; 442} 443 444static int bch2_data_job_release(struct inode *inode, struct file *file) 445{ 446 struct bch_data_ctx *ctx = container_of(file->private_data, struct bch_data_ctx, thr); 447 448 bch2_thread_with_file_exit(&ctx->thr); 449 kfree(ctx); 450 return 0; 451} 452 453static ssize_t bch2_data_job_read(struct file *file, char __user *buf, 454 size_t len, loff_t *ppos) 455{ 456 struct bch_data_ctx *ctx = container_of(file->private_data, struct bch_data_ctx, thr); 457 struct bch_fs *c = ctx->c; 458 struct bch_ioctl_data_event e = { 459 .type = BCH_DATA_EVENT_PROGRESS, 460 .p.data_type = ctx->stats.data_type, 461 .p.btree_id = ctx->stats.pos.btree, 462 .p.pos = ctx->stats.pos.pos, 463 .p.sectors_done = atomic64_read(&ctx->stats.sectors_seen), 464 .p.sectors_total = bch2_fs_usage_read_short(c).used, 465 }; 466 467 if (len < sizeof(e)) 468 return -EINVAL; 469 470 return copy_to_user_errcode(buf, &e, sizeof(e)) ?: sizeof(e); 471} 472 473static const struct file_operations bcachefs_data_ops = { 474 .release = bch2_data_job_release, 475 .read = bch2_data_job_read, 476 .llseek = no_llseek, 477}; 478 479static long bch2_ioctl_data(struct bch_fs *c, 480 struct bch_ioctl_data arg) 481{ 482 struct bch_data_ctx *ctx; 483 int ret; 484 485 if (!capable(CAP_SYS_ADMIN)) 486 return -EPERM; 487 488 if (arg.op >= BCH_DATA_OP_NR || arg.flags) 489 return -EINVAL; 490 491 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 492 if (!ctx) 493 return -ENOMEM; 494 495 ctx->c = c; 496 ctx->arg = arg; 497 498 ret = bch2_run_thread_with_file(&ctx->thr, 499 &bcachefs_data_ops, 500 bch2_data_thread); 501 if (ret < 0) 502 kfree(ctx); 503 return ret; 504} 505 506static long bch2_ioctl_fs_usage(struct bch_fs *c, 507 struct bch_ioctl_fs_usage __user *user_arg) 508{ 509 struct bch_ioctl_fs_usage *arg = NULL; 510 struct bch_replicas_usage *dst_e, *dst_end; 511 struct bch_fs_usage_online *src; 512 u32 replica_entries_bytes; 513 unsigned i; 514 int ret = 0; 515 516 if (!test_bit(BCH_FS_started, &c->flags)) 517 return -EINVAL; 518 519 if (get_user(replica_entries_bytes, &user_arg->replica_entries_bytes)) 520 return -EFAULT; 521 522 arg = kzalloc(size_add(sizeof(*arg), replica_entries_bytes), GFP_KERNEL); 523 if (!arg) 524 return -ENOMEM; 525 526 src = bch2_fs_usage_read(c); 527 if (!src) { 528 ret = -ENOMEM; 529 goto err; 530 } 531 532 arg->capacity = c->capacity; 533 arg->used = bch2_fs_sectors_used(c, src); 534 arg->online_reserved = src->online_reserved; 535 536 for (i = 0; i < BCH_REPLICAS_MAX; i++) 537 arg->persistent_reserved[i] = src->u.persistent_reserved[i]; 538 539 dst_e = arg->replicas; 540 dst_end = (void *) arg->replicas + replica_entries_bytes; 541 542 for (i = 0; i < c->replicas.nr; i++) { 543 struct bch_replicas_entry_v1 *src_e = 544 cpu_replicas_entry(&c->replicas, i); 545 546 /* check that we have enough space for one replicas entry */ 547 if (dst_e + 1 > dst_end) { 548 ret = -ERANGE; 549 break; 550 } 551 552 dst_e->sectors = src->u.replicas[i]; 553 dst_e->r = *src_e; 554 555 /* recheck after setting nr_devs: */ 556 if (replicas_usage_next(dst_e) > dst_end) { 557 ret = -ERANGE; 558 break; 559 } 560 561 memcpy(dst_e->r.devs, src_e->devs, src_e->nr_devs); 562 563 dst_e = replicas_usage_next(dst_e); 564 } 565 566 arg->replica_entries_bytes = (void *) dst_e - (void *) arg->replicas; 567 568 percpu_up_read(&c->mark_lock); 569 kfree(src); 570 571 if (ret) 572 goto err; 573 574 ret = copy_to_user_errcode(user_arg, arg, 575 sizeof(*arg) + arg->replica_entries_bytes); 576err: 577 kfree(arg); 578 return ret; 579} 580 581/* obsolete, didn't allow for new data types: */ 582static long bch2_ioctl_dev_usage(struct bch_fs *c, 583 struct bch_ioctl_dev_usage __user *user_arg) 584{ 585 struct bch_ioctl_dev_usage arg; 586 struct bch_dev_usage src; 587 struct bch_dev *ca; 588 unsigned i; 589 590 if (!test_bit(BCH_FS_started, &c->flags)) 591 return -EINVAL; 592 593 if (copy_from_user(&arg, user_arg, sizeof(arg))) 594 return -EFAULT; 595 596 if ((arg.flags & ~BCH_BY_INDEX) || 597 arg.pad[0] || 598 arg.pad[1] || 599 arg.pad[2]) 600 return -EINVAL; 601 602 ca = bch2_device_lookup(c, arg.dev, arg.flags); 603 if (IS_ERR(ca)) 604 return PTR_ERR(ca); 605 606 src = bch2_dev_usage_read(ca); 607 608 arg.state = ca->mi.state; 609 arg.bucket_size = ca->mi.bucket_size; 610 arg.nr_buckets = ca->mi.nbuckets - ca->mi.first_bucket; 611 612 for (i = 0; i < BCH_DATA_NR; i++) { 613 arg.d[i].buckets = src.d[i].buckets; 614 arg.d[i].sectors = src.d[i].sectors; 615 arg.d[i].fragmented = src.d[i].fragmented; 616 } 617 618 percpu_ref_put(&ca->ref); 619 620 return copy_to_user_errcode(user_arg, &arg, sizeof(arg)); 621} 622 623static long bch2_ioctl_dev_usage_v2(struct bch_fs *c, 624 struct bch_ioctl_dev_usage_v2 __user *user_arg) 625{ 626 struct bch_ioctl_dev_usage_v2 arg; 627 struct bch_dev_usage src; 628 struct bch_dev *ca; 629 int ret = 0; 630 631 if (!test_bit(BCH_FS_started, &c->flags)) 632 return -EINVAL; 633 634 if (copy_from_user(&arg, user_arg, sizeof(arg))) 635 return -EFAULT; 636 637 if ((arg.flags & ~BCH_BY_INDEX) || 638 arg.pad[0] || 639 arg.pad[1] || 640 arg.pad[2]) 641 return -EINVAL; 642 643 ca = bch2_device_lookup(c, arg.dev, arg.flags); 644 if (IS_ERR(ca)) 645 return PTR_ERR(ca); 646 647 src = bch2_dev_usage_read(ca); 648 649 arg.state = ca->mi.state; 650 arg.bucket_size = ca->mi.bucket_size; 651 arg.nr_data_types = min(arg.nr_data_types, BCH_DATA_NR); 652 arg.nr_buckets = ca->mi.nbuckets - ca->mi.first_bucket; 653 654 ret = copy_to_user_errcode(user_arg, &arg, sizeof(arg)); 655 if (ret) 656 goto err; 657 658 for (unsigned i = 0; i < arg.nr_data_types; i++) { 659 struct bch_ioctl_dev_usage_type t = { 660 .buckets = src.d[i].buckets, 661 .sectors = src.d[i].sectors, 662 .fragmented = src.d[i].fragmented, 663 }; 664 665 ret = copy_to_user_errcode(&user_arg->d[i], &t, sizeof(t)); 666 if (ret) 667 goto err; 668 } 669err: 670 percpu_ref_put(&ca->ref); 671 return ret; 672} 673 674static long bch2_ioctl_read_super(struct bch_fs *c, 675 struct bch_ioctl_read_super arg) 676{ 677 struct bch_dev *ca = NULL; 678 struct bch_sb *sb; 679 int ret = 0; 680 681 if (!capable(CAP_SYS_ADMIN)) 682 return -EPERM; 683 684 if ((arg.flags & ~(BCH_BY_INDEX|BCH_READ_DEV)) || 685 arg.pad) 686 return -EINVAL; 687 688 mutex_lock(&c->sb_lock); 689 690 if (arg.flags & BCH_READ_DEV) { 691 ca = bch2_device_lookup(c, arg.dev, arg.flags); 692 693 if (IS_ERR(ca)) { 694 ret = PTR_ERR(ca); 695 goto err; 696 } 697 698 sb = ca->disk_sb.sb; 699 } else { 700 sb = c->disk_sb.sb; 701 } 702 703 if (vstruct_bytes(sb) > arg.size) { 704 ret = -ERANGE; 705 goto err; 706 } 707 708 ret = copy_to_user_errcode((void __user *)(unsigned long)arg.sb, sb, 709 vstruct_bytes(sb)); 710err: 711 if (!IS_ERR_OR_NULL(ca)) 712 percpu_ref_put(&ca->ref); 713 mutex_unlock(&c->sb_lock); 714 return ret; 715} 716 717static long bch2_ioctl_disk_get_idx(struct bch_fs *c, 718 struct bch_ioctl_disk_get_idx arg) 719{ 720 dev_t dev = huge_decode_dev(arg.dev); 721 722 if (!capable(CAP_SYS_ADMIN)) 723 return -EPERM; 724 725 if (!dev) 726 return -EINVAL; 727 728 for_each_online_member(c, ca) 729 if (ca->dev == dev) { 730 percpu_ref_put(&ca->io_ref); 731 return ca->dev_idx; 732 } 733 734 return -BCH_ERR_ENOENT_dev_idx_not_found; 735} 736 737static long bch2_ioctl_disk_resize(struct bch_fs *c, 738 struct bch_ioctl_disk_resize arg) 739{ 740 struct bch_dev *ca; 741 int ret; 742 743 if (!capable(CAP_SYS_ADMIN)) 744 return -EPERM; 745 746 if ((arg.flags & ~BCH_BY_INDEX) || 747 arg.pad) 748 return -EINVAL; 749 750 ca = bch2_device_lookup(c, arg.dev, arg.flags); 751 if (IS_ERR(ca)) 752 return PTR_ERR(ca); 753 754 ret = bch2_dev_resize(c, ca, arg.nbuckets); 755 756 percpu_ref_put(&ca->ref); 757 return ret; 758} 759 760static long bch2_ioctl_disk_resize_journal(struct bch_fs *c, 761 struct bch_ioctl_disk_resize_journal arg) 762{ 763 struct bch_dev *ca; 764 int ret; 765 766 if (!capable(CAP_SYS_ADMIN)) 767 return -EPERM; 768 769 if ((arg.flags & ~BCH_BY_INDEX) || 770 arg.pad) 771 return -EINVAL; 772 773 if (arg.nbuckets > U32_MAX) 774 return -EINVAL; 775 776 ca = bch2_device_lookup(c, arg.dev, arg.flags); 777 if (IS_ERR(ca)) 778 return PTR_ERR(ca); 779 780 ret = bch2_set_nr_journal_buckets(c, ca, arg.nbuckets); 781 782 percpu_ref_put(&ca->ref); 783 return ret; 784} 785 786static int bch2_fsck_online_thread_fn(struct thread_with_stdio *stdio) 787{ 788 struct fsck_thread *thr = container_of(stdio, struct fsck_thread, thr); 789 struct bch_fs *c = thr->c; 790 791 c->stdio_filter = current; 792 c->stdio = &thr->thr.stdio; 793 794 /* 795 * XXX: can we figure out a way to do this without mucking with c->opts? 796 */ 797 unsigned old_fix_errors = c->opts.fix_errors; 798 if (opt_defined(thr->opts, fix_errors)) 799 c->opts.fix_errors = thr->opts.fix_errors; 800 else 801 c->opts.fix_errors = FSCK_FIX_ask; 802 803 c->opts.fsck = true; 804 set_bit(BCH_FS_fsck_running, &c->flags); 805 806 c->curr_recovery_pass = BCH_RECOVERY_PASS_check_alloc_info; 807 int ret = bch2_run_online_recovery_passes(c); 808 809 clear_bit(BCH_FS_fsck_running, &c->flags); 810 bch_err_fn(c, ret); 811 812 c->stdio = NULL; 813 c->stdio_filter = NULL; 814 c->opts.fix_errors = old_fix_errors; 815 816 up(&c->online_fsck_mutex); 817 bch2_ro_ref_put(c); 818 return ret; 819} 820 821static const struct thread_with_stdio_ops bch2_online_fsck_ops = { 822 .exit = bch2_fsck_thread_exit, 823 .fn = bch2_fsck_online_thread_fn, 824}; 825 826static long bch2_ioctl_fsck_online(struct bch_fs *c, 827 struct bch_ioctl_fsck_online arg) 828{ 829 struct fsck_thread *thr = NULL; 830 long ret = 0; 831 832 if (arg.flags) 833 return -EINVAL; 834 835 if (!capable(CAP_SYS_ADMIN)) 836 return -EPERM; 837 838 if (!bch2_ro_ref_tryget(c)) 839 return -EROFS; 840 841 if (down_trylock(&c->online_fsck_mutex)) { 842 bch2_ro_ref_put(c); 843 return -EAGAIN; 844 } 845 846 thr = kzalloc(sizeof(*thr), GFP_KERNEL); 847 if (!thr) { 848 ret = -ENOMEM; 849 goto err; 850 } 851 852 thr->c = c; 853 thr->opts = bch2_opts_empty(); 854 855 if (arg.opts) { 856 char *optstr = strndup_user((char __user *)(unsigned long) arg.opts, 1 << 16); 857 858 ret = PTR_ERR_OR_ZERO(optstr) ?: 859 bch2_parse_mount_opts(c, &thr->opts, optstr); 860 kfree(optstr); 861 862 if (ret) 863 goto err; 864 } 865 866 ret = bch2_run_thread_with_stdio(&thr->thr, &bch2_online_fsck_ops); 867err: 868 if (ret < 0) { 869 bch_err_fn(c, ret); 870 if (thr) 871 bch2_fsck_thread_exit(&thr->thr); 872 up(&c->online_fsck_mutex); 873 bch2_ro_ref_put(c); 874 } 875 return ret; 876} 877 878#define BCH_IOCTL(_name, _argtype) \ 879do { \ 880 _argtype i; \ 881 \ 882 if (copy_from_user(&i, arg, sizeof(i))) \ 883 return -EFAULT; \ 884 ret = bch2_ioctl_##_name(c, i); \ 885 goto out; \ 886} while (0) 887 888long bch2_fs_ioctl(struct bch_fs *c, unsigned cmd, void __user *arg) 889{ 890 long ret; 891 892 switch (cmd) { 893 case BCH_IOCTL_QUERY_UUID: 894 return bch2_ioctl_query_uuid(c, arg); 895 case BCH_IOCTL_FS_USAGE: 896 return bch2_ioctl_fs_usage(c, arg); 897 case BCH_IOCTL_DEV_USAGE: 898 return bch2_ioctl_dev_usage(c, arg); 899 case BCH_IOCTL_DEV_USAGE_V2: 900 return bch2_ioctl_dev_usage_v2(c, arg); 901#if 0 902 case BCH_IOCTL_START: 903 BCH_IOCTL(start, struct bch_ioctl_start); 904 case BCH_IOCTL_STOP: 905 return bch2_ioctl_stop(c); 906#endif 907 case BCH_IOCTL_READ_SUPER: 908 BCH_IOCTL(read_super, struct bch_ioctl_read_super); 909 case BCH_IOCTL_DISK_GET_IDX: 910 BCH_IOCTL(disk_get_idx, struct bch_ioctl_disk_get_idx); 911 } 912 913 if (!test_bit(BCH_FS_started, &c->flags)) 914 return -EINVAL; 915 916 switch (cmd) { 917 case BCH_IOCTL_DISK_ADD: 918 BCH_IOCTL(disk_add, struct bch_ioctl_disk); 919 case BCH_IOCTL_DISK_REMOVE: 920 BCH_IOCTL(disk_remove, struct bch_ioctl_disk); 921 case BCH_IOCTL_DISK_ONLINE: 922 BCH_IOCTL(disk_online, struct bch_ioctl_disk); 923 case BCH_IOCTL_DISK_OFFLINE: 924 BCH_IOCTL(disk_offline, struct bch_ioctl_disk); 925 case BCH_IOCTL_DISK_SET_STATE: 926 BCH_IOCTL(disk_set_state, struct bch_ioctl_disk_set_state); 927 case BCH_IOCTL_DATA: 928 BCH_IOCTL(data, struct bch_ioctl_data); 929 case BCH_IOCTL_DISK_RESIZE: 930 BCH_IOCTL(disk_resize, struct bch_ioctl_disk_resize); 931 case BCH_IOCTL_DISK_RESIZE_JOURNAL: 932 BCH_IOCTL(disk_resize_journal, struct bch_ioctl_disk_resize_journal); 933 case BCH_IOCTL_FSCK_ONLINE: 934 BCH_IOCTL(fsck_online, struct bch_ioctl_fsck_online); 935 default: 936 return -ENOTTY; 937 } 938out: 939 if (ret < 0) 940 ret = bch2_err_class(ret); 941 return ret; 942} 943 944static DEFINE_IDR(bch_chardev_minor); 945 946static long bch2_chardev_ioctl(struct file *filp, unsigned cmd, unsigned long v) 947{ 948 unsigned minor = iminor(file_inode(filp)); 949 struct bch_fs *c = minor < U8_MAX ? idr_find(&bch_chardev_minor, minor) : NULL; 950 void __user *arg = (void __user *) v; 951 952 return c 953 ? bch2_fs_ioctl(c, cmd, arg) 954 : bch2_global_ioctl(cmd, arg); 955} 956 957static const struct file_operations bch_chardev_fops = { 958 .owner = THIS_MODULE, 959 .unlocked_ioctl = bch2_chardev_ioctl, 960 .open = nonseekable_open, 961}; 962 963static int bch_chardev_major; 964static struct class *bch_chardev_class; 965static struct device *bch_chardev; 966 967void bch2_fs_chardev_exit(struct bch_fs *c) 968{ 969 if (!IS_ERR_OR_NULL(c->chardev)) 970 device_unregister(c->chardev); 971 if (c->minor >= 0) 972 idr_remove(&bch_chardev_minor, c->minor); 973} 974 975int bch2_fs_chardev_init(struct bch_fs *c) 976{ 977 c->minor = idr_alloc(&bch_chardev_minor, c, 0, 0, GFP_KERNEL); 978 if (c->minor < 0) 979 return c->minor; 980 981 c->chardev = device_create(bch_chardev_class, NULL, 982 MKDEV(bch_chardev_major, c->minor), c, 983 "bcachefs%u-ctl", c->minor); 984 if (IS_ERR(c->chardev)) 985 return PTR_ERR(c->chardev); 986 987 return 0; 988} 989 990void bch2_chardev_exit(void) 991{ 992 if (!IS_ERR_OR_NULL(bch_chardev_class)) 993 device_destroy(bch_chardev_class, 994 MKDEV(bch_chardev_major, U8_MAX)); 995 if (!IS_ERR_OR_NULL(bch_chardev_class)) 996 class_destroy(bch_chardev_class); 997 if (bch_chardev_major > 0) 998 unregister_chrdev(bch_chardev_major, "bcachefs"); 999} 1000 1001int __init bch2_chardev_init(void) 1002{ 1003 bch_chardev_major = register_chrdev(0, "bcachefs-ctl", &bch_chardev_fops); 1004 if (bch_chardev_major < 0) 1005 return bch_chardev_major; 1006 1007 bch_chardev_class = class_create("bcachefs"); 1008 if (IS_ERR(bch_chardev_class)) 1009 return PTR_ERR(bch_chardev_class); 1010 1011 bch_chardev = device_create(bch_chardev_class, NULL, 1012 MKDEV(bch_chardev_major, U8_MAX), 1013 NULL, "bcachefs-ctl"); 1014 if (IS_ERR(bch_chardev)) 1015 return PTR_ERR(bch_chardev); 1016 1017 return 0; 1018} 1019 1020#endif /* NO_BCACHEFS_CHARDEV */ 1021