1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_shared.h" 9 #include "xfs_format.h" 10 #include "xfs_log_format.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_mount.h" 13 #include "xfs_inode.h" 14 #include "xfs_rtalloc.h" 15 #include "xfs_iwalk.h" 16 #include "xfs_itable.h" 17 #include "xfs_error.h" 18 #include "xfs_attr.h" 19 #include "xfs_bmap.h" 20 #include "xfs_bmap_util.h" 21 #include "xfs_fsops.h" 22 #include "xfs_discard.h" 23 #include "xfs_quota.h" 24 #include "xfs_export.h" 25 #include "xfs_trace.h" 26 #include "xfs_icache.h" 27 #include "xfs_trans.h" 28 #include "xfs_acl.h" 29 #include "xfs_btree.h" 30 #include <linux/fsmap.h> 31 #include "xfs_fsmap.h" 32 #include "scrub/xfs_scrub.h" 33 #include "xfs_sb.h" 34 #include "xfs_ag.h" 35 #include "xfs_health.h" 36 #include "xfs_reflink.h" 37 #include "xfs_ioctl.h" 38 #include "xfs_da_format.h" 39 #include "xfs_da_btree.h" 40 41 #include <linux/mount.h> 42 #include <linux/namei.h> 43 44 /* 45 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 46 * a file or fs handle. 47 * 48 * XFS_IOC_PATH_TO_FSHANDLE 49 * returns fs handle for a mount point or path within that mount point 50 * XFS_IOC_FD_TO_HANDLE 51 * returns full handle for a FD opened in user space 52 * XFS_IOC_PATH_TO_HANDLE 53 * returns full handle for a path 54 */ 55 int 56 xfs_find_handle( 57 unsigned int cmd, 58 xfs_fsop_handlereq_t *hreq) 59 { 60 int hsize; 61 xfs_handle_t handle; 62 struct inode *inode; 63 struct fd f = {NULL}; 64 struct path path; 65 int error; 66 struct xfs_inode *ip; 67 68 if (cmd == XFS_IOC_FD_TO_HANDLE) { 69 f = fdget(hreq->fd); 70 if (!f.file) 71 return -EBADF; 72 inode = file_inode(f.file); 73 } else { 74 error = user_path_at(AT_FDCWD, hreq->path, 0, &path); 75 if (error) 76 return error; 77 inode = d_inode(path.dentry); 78 } 79 ip = XFS_I(inode); 80 81 /* 82 * We can only generate handles for inodes residing on a XFS filesystem, 83 * and only for regular files, directories or symbolic links. 84 */ 85 error = -EINVAL; 86 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 87 goto out_put; 88 89 error = -EBADF; 90 if (!S_ISREG(inode->i_mode) && 91 !S_ISDIR(inode->i_mode) && 92 !S_ISLNK(inode->i_mode)) 93 goto out_put; 94 95 96 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 97 98 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 99 /* 100 * This handle only contains an fsid, zero the rest. 101 */ 102 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 103 hsize = sizeof(xfs_fsid_t); 104 } else { 105 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 106 sizeof(handle.ha_fid.fid_len); 107 handle.ha_fid.fid_pad = 0; 108 handle.ha_fid.fid_gen = inode->i_generation; 109 handle.ha_fid.fid_ino = ip->i_ino; 110 hsize = sizeof(xfs_handle_t); 111 } 112 113 error = -EFAULT; 114 if (copy_to_user(hreq->ohandle, &handle, hsize) || 115 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 116 goto out_put; 117 118 error = 0; 119 120 out_put: 121 if (cmd == XFS_IOC_FD_TO_HANDLE) 122 fdput(f); 123 else 124 path_put(&path); 125 return error; 126 } 127 128 /* 129 * No need to do permission checks on the various pathname components 130 * as the handle operations are privileged. 131 */ 132 STATIC int 133 xfs_handle_acceptable( 134 void *context, 135 struct dentry *dentry) 136 { 137 return 1; 138 } 139 140 /* 141 * Convert userspace handle data into a dentry. 142 */ 143 struct dentry * 144 xfs_handle_to_dentry( 145 struct file *parfilp, 146 void __user *uhandle, 147 u32 hlen) 148 { 149 xfs_handle_t handle; 150 struct xfs_fid64 fid; 151 152 /* 153 * Only allow handle opens under a directory. 154 */ 155 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 156 return ERR_PTR(-ENOTDIR); 157 158 if (hlen != sizeof(xfs_handle_t)) 159 return ERR_PTR(-EINVAL); 160 if (copy_from_user(&handle, uhandle, hlen)) 161 return ERR_PTR(-EFAULT); 162 if (handle.ha_fid.fid_len != 163 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 164 return ERR_PTR(-EINVAL); 165 166 memset(&fid, 0, sizeof(struct fid)); 167 fid.ino = handle.ha_fid.fid_ino; 168 fid.gen = handle.ha_fid.fid_gen; 169 170 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 171 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 172 xfs_handle_acceptable, NULL); 173 } 174 175 STATIC struct dentry * 176 xfs_handlereq_to_dentry( 177 struct file *parfilp, 178 xfs_fsop_handlereq_t *hreq) 179 { 180 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 181 } 182 183 int 184 xfs_open_by_handle( 185 struct file *parfilp, 186 xfs_fsop_handlereq_t *hreq) 187 { 188 const struct cred *cred = current_cred(); 189 int error; 190 int fd; 191 int permflag; 192 struct file *filp; 193 struct inode *inode; 194 struct dentry *dentry; 195 fmode_t fmode; 196 struct path path; 197 198 if (!capable(CAP_SYS_ADMIN)) 199 return -EPERM; 200 201 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 202 if (IS_ERR(dentry)) 203 return PTR_ERR(dentry); 204 inode = d_inode(dentry); 205 206 /* Restrict xfs_open_by_handle to directories & regular files. */ 207 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 208 error = -EPERM; 209 goto out_dput; 210 } 211 212 #if BITS_PER_LONG != 32 213 hreq->oflags |= O_LARGEFILE; 214 #endif 215 216 permflag = hreq->oflags; 217 fmode = OPEN_FMODE(permflag); 218 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 219 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 220 error = -EPERM; 221 goto out_dput; 222 } 223 224 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 225 error = -EPERM; 226 goto out_dput; 227 } 228 229 /* Can't write directories. */ 230 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 231 error = -EISDIR; 232 goto out_dput; 233 } 234 235 fd = get_unused_fd_flags(0); 236 if (fd < 0) { 237 error = fd; 238 goto out_dput; 239 } 240 241 path.mnt = parfilp->f_path.mnt; 242 path.dentry = dentry; 243 filp = dentry_open(&path, hreq->oflags, cred); 244 dput(dentry); 245 if (IS_ERR(filp)) { 246 put_unused_fd(fd); 247 return PTR_ERR(filp); 248 } 249 250 if (S_ISREG(inode->i_mode)) { 251 filp->f_flags |= O_NOATIME; 252 filp->f_mode |= FMODE_NOCMTIME; 253 } 254 255 fd_install(fd, filp); 256 return fd; 257 258 out_dput: 259 dput(dentry); 260 return error; 261 } 262 263 int 264 xfs_readlink_by_handle( 265 struct file *parfilp, 266 xfs_fsop_handlereq_t *hreq) 267 { 268 struct dentry *dentry; 269 __u32 olen; 270 int error; 271 272 if (!capable(CAP_SYS_ADMIN)) 273 return -EPERM; 274 275 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 276 if (IS_ERR(dentry)) 277 return PTR_ERR(dentry); 278 279 /* Restrict this handle operation to symlinks only. */ 280 if (!d_is_symlink(dentry)) { 281 error = -EINVAL; 282 goto out_dput; 283 } 284 285 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 286 error = -EFAULT; 287 goto out_dput; 288 } 289 290 error = vfs_readlink(dentry, hreq->ohandle, olen); 291 292 out_dput: 293 dput(dentry); 294 return error; 295 } 296 297 /* 298 * Format an attribute and copy it out to the user's buffer. 299 * Take care to check values and protect against them changing later, 300 * we may be reading them directly out of a user buffer. 301 */ 302 static void 303 xfs_ioc_attr_put_listent( 304 struct xfs_attr_list_context *context, 305 int flags, 306 unsigned char *name, 307 int namelen, 308 int valuelen) 309 { 310 struct xfs_attrlist *alist = context->buffer; 311 struct xfs_attrlist_ent *aep; 312 int arraytop; 313 314 ASSERT(!context->seen_enough); 315 ASSERT(context->count >= 0); 316 ASSERT(context->count < (ATTR_MAX_VALUELEN/8)); 317 ASSERT(context->firstu >= sizeof(*alist)); 318 ASSERT(context->firstu <= context->bufsize); 319 320 /* 321 * Only list entries in the right namespace. 322 */ 323 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK)) 324 return; 325 326 arraytop = sizeof(*alist) + 327 context->count * sizeof(alist->al_offset[0]); 328 329 /* decrement by the actual bytes used by the attr */ 330 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) + 331 namelen + 1, sizeof(uint32_t)); 332 if (context->firstu < arraytop) { 333 trace_xfs_attr_list_full(context); 334 alist->al_more = 1; 335 context->seen_enough = 1; 336 return; 337 } 338 339 aep = context->buffer + context->firstu; 340 aep->a_valuelen = valuelen; 341 memcpy(aep->a_name, name, namelen); 342 aep->a_name[namelen] = 0; 343 alist->al_offset[context->count++] = context->firstu; 344 alist->al_count = context->count; 345 trace_xfs_attr_list_add(context); 346 } 347 348 static unsigned int 349 xfs_attr_filter( 350 u32 ioc_flags) 351 { 352 if (ioc_flags & XFS_IOC_ATTR_ROOT) 353 return XFS_ATTR_ROOT; 354 if (ioc_flags & XFS_IOC_ATTR_SECURE) 355 return XFS_ATTR_SECURE; 356 return 0; 357 } 358 359 static unsigned int 360 xfs_attr_flags( 361 u32 ioc_flags) 362 { 363 if (ioc_flags & XFS_IOC_ATTR_CREATE) 364 return XATTR_CREATE; 365 if (ioc_flags & XFS_IOC_ATTR_REPLACE) 366 return XATTR_REPLACE; 367 return 0; 368 } 369 370 int 371 xfs_ioc_attr_list( 372 struct xfs_inode *dp, 373 void __user *ubuf, 374 int bufsize, 375 int flags, 376 struct xfs_attrlist_cursor __user *ucursor) 377 { 378 struct xfs_attr_list_context context = { }; 379 struct xfs_attrlist *alist; 380 void *buffer; 381 int error; 382 383 if (bufsize < sizeof(struct xfs_attrlist) || 384 bufsize > XFS_XATTR_LIST_MAX) 385 return -EINVAL; 386 387 /* 388 * Reject flags, only allow namespaces. 389 */ 390 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE)) 391 return -EINVAL; 392 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE)) 393 return -EINVAL; 394 395 /* 396 * Validate the cursor. 397 */ 398 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor))) 399 return -EFAULT; 400 if (context.cursor.pad1 || context.cursor.pad2) 401 return -EINVAL; 402 if (!context.cursor.initted && 403 (context.cursor.hashval || context.cursor.blkno || 404 context.cursor.offset)) 405 return -EINVAL; 406 407 buffer = kvzalloc(bufsize, GFP_KERNEL); 408 if (!buffer) 409 return -ENOMEM; 410 411 /* 412 * Initialize the output buffer. 413 */ 414 context.dp = dp; 415 context.resynch = 1; 416 context.attr_filter = xfs_attr_filter(flags); 417 context.buffer = buffer; 418 context.bufsize = round_down(bufsize, sizeof(uint32_t)); 419 context.firstu = context.bufsize; 420 context.put_listent = xfs_ioc_attr_put_listent; 421 422 alist = context.buffer; 423 alist->al_count = 0; 424 alist->al_more = 0; 425 alist->al_offset[0] = context.bufsize; 426 427 error = xfs_attr_list(&context); 428 if (error) 429 goto out_free; 430 431 if (copy_to_user(ubuf, buffer, bufsize) || 432 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor))) 433 error = -EFAULT; 434 out_free: 435 kmem_free(buffer); 436 return error; 437 } 438 439 STATIC int 440 xfs_attrlist_by_handle( 441 struct file *parfilp, 442 struct xfs_fsop_attrlist_handlereq __user *p) 443 { 444 struct xfs_fsop_attrlist_handlereq al_hreq; 445 struct dentry *dentry; 446 int error = -ENOMEM; 447 448 if (!capable(CAP_SYS_ADMIN)) 449 return -EPERM; 450 if (copy_from_user(&al_hreq, p, sizeof(al_hreq))) 451 return -EFAULT; 452 453 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 454 if (IS_ERR(dentry)) 455 return PTR_ERR(dentry); 456 457 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer, 458 al_hreq.buflen, al_hreq.flags, &p->pos); 459 dput(dentry); 460 return error; 461 } 462 463 static int 464 xfs_attrmulti_attr_get( 465 struct inode *inode, 466 unsigned char *name, 467 unsigned char __user *ubuf, 468 uint32_t *len, 469 uint32_t flags) 470 { 471 struct xfs_da_args args = { 472 .dp = XFS_I(inode), 473 .attr_filter = xfs_attr_filter(flags), 474 .attr_flags = xfs_attr_flags(flags), 475 .name = name, 476 .namelen = strlen(name), 477 .valuelen = *len, 478 }; 479 int error; 480 481 if (*len > XFS_XATTR_SIZE_MAX) 482 return -EINVAL; 483 484 error = xfs_attr_get(&args); 485 if (error) 486 goto out_kfree; 487 488 *len = args.valuelen; 489 if (copy_to_user(ubuf, args.value, args.valuelen)) 490 error = -EFAULT; 491 492 out_kfree: 493 kmem_free(args.value); 494 return error; 495 } 496 497 static int 498 xfs_attrmulti_attr_set( 499 struct inode *inode, 500 unsigned char *name, 501 const unsigned char __user *ubuf, 502 uint32_t len, 503 uint32_t flags) 504 { 505 struct xfs_da_args args = { 506 .dp = XFS_I(inode), 507 .attr_filter = xfs_attr_filter(flags), 508 .attr_flags = xfs_attr_flags(flags), 509 .name = name, 510 .namelen = strlen(name), 511 }; 512 int error; 513 514 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 515 return -EPERM; 516 517 if (ubuf) { 518 if (len > XFS_XATTR_SIZE_MAX) 519 return -EINVAL; 520 args.value = memdup_user(ubuf, len); 521 if (IS_ERR(args.value)) 522 return PTR_ERR(args.value); 523 args.valuelen = len; 524 } 525 526 error = xfs_attr_set(&args); 527 if (!error && (flags & XFS_IOC_ATTR_ROOT)) 528 xfs_forget_acl(inode, name); 529 kfree(args.value); 530 return error; 531 } 532 533 int 534 xfs_ioc_attrmulti_one( 535 struct file *parfilp, 536 struct inode *inode, 537 uint32_t opcode, 538 void __user *uname, 539 void __user *value, 540 uint32_t *len, 541 uint32_t flags) 542 { 543 unsigned char *name; 544 int error; 545 546 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE)) 547 return -EINVAL; 548 549 name = strndup_user(uname, MAXNAMELEN); 550 if (IS_ERR(name)) 551 return PTR_ERR(name); 552 553 switch (opcode) { 554 case ATTR_OP_GET: 555 error = xfs_attrmulti_attr_get(inode, name, value, len, flags); 556 break; 557 case ATTR_OP_REMOVE: 558 value = NULL; 559 *len = 0; 560 /* fall through */ 561 case ATTR_OP_SET: 562 error = mnt_want_write_file(parfilp); 563 if (error) 564 break; 565 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags); 566 mnt_drop_write_file(parfilp); 567 break; 568 default: 569 error = -EINVAL; 570 break; 571 } 572 573 kfree(name); 574 return error; 575 } 576 577 STATIC int 578 xfs_attrmulti_by_handle( 579 struct file *parfilp, 580 void __user *arg) 581 { 582 int error; 583 xfs_attr_multiop_t *ops; 584 xfs_fsop_attrmulti_handlereq_t am_hreq; 585 struct dentry *dentry; 586 unsigned int i, size; 587 588 if (!capable(CAP_SYS_ADMIN)) 589 return -EPERM; 590 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 591 return -EFAULT; 592 593 /* overflow check */ 594 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 595 return -E2BIG; 596 597 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 598 if (IS_ERR(dentry)) 599 return PTR_ERR(dentry); 600 601 error = -E2BIG; 602 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 603 if (!size || size > 16 * PAGE_SIZE) 604 goto out_dput; 605 606 ops = memdup_user(am_hreq.ops, size); 607 if (IS_ERR(ops)) { 608 error = PTR_ERR(ops); 609 goto out_dput; 610 } 611 612 error = 0; 613 for (i = 0; i < am_hreq.opcount; i++) { 614 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp, 615 d_inode(dentry), ops[i].am_opcode, 616 ops[i].am_attrname, ops[i].am_attrvalue, 617 &ops[i].am_length, ops[i].am_flags); 618 } 619 620 if (copy_to_user(am_hreq.ops, ops, size)) 621 error = -EFAULT; 622 623 kfree(ops); 624 out_dput: 625 dput(dentry); 626 return error; 627 } 628 629 int 630 xfs_ioc_space( 631 struct file *filp, 632 xfs_flock64_t *bf) 633 { 634 struct inode *inode = file_inode(filp); 635 struct xfs_inode *ip = XFS_I(inode); 636 struct iattr iattr; 637 enum xfs_prealloc_flags flags = XFS_PREALLOC_CLEAR; 638 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; 639 int error; 640 641 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 642 return -EPERM; 643 644 if (!(filp->f_mode & FMODE_WRITE)) 645 return -EBADF; 646 647 if (!S_ISREG(inode->i_mode)) 648 return -EINVAL; 649 650 if (xfs_is_always_cow_inode(ip)) 651 return -EOPNOTSUPP; 652 653 if (filp->f_flags & O_DSYNC) 654 flags |= XFS_PREALLOC_SYNC; 655 if (filp->f_mode & FMODE_NOCMTIME) 656 flags |= XFS_PREALLOC_INVISIBLE; 657 658 error = mnt_want_write_file(filp); 659 if (error) 660 return error; 661 662 xfs_ilock(ip, iolock); 663 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); 664 if (error) 665 goto out_unlock; 666 inode_dio_wait(inode); 667 668 switch (bf->l_whence) { 669 case 0: /*SEEK_SET*/ 670 break; 671 case 1: /*SEEK_CUR*/ 672 bf->l_start += filp->f_pos; 673 break; 674 case 2: /*SEEK_END*/ 675 bf->l_start += XFS_ISIZE(ip); 676 break; 677 default: 678 error = -EINVAL; 679 goto out_unlock; 680 } 681 682 if (bf->l_start < 0 || bf->l_start > inode->i_sb->s_maxbytes) { 683 error = -EINVAL; 684 goto out_unlock; 685 } 686 687 if (bf->l_start > XFS_ISIZE(ip)) { 688 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 689 bf->l_start - XFS_ISIZE(ip), 0); 690 if (error) 691 goto out_unlock; 692 } 693 694 iattr.ia_valid = ATTR_SIZE; 695 iattr.ia_size = bf->l_start; 696 error = xfs_vn_setattr_size(file_mnt_user_ns(filp), file_dentry(filp), 697 &iattr); 698 if (error) 699 goto out_unlock; 700 701 error = xfs_update_prealloc_flags(ip, flags); 702 703 out_unlock: 704 xfs_iunlock(ip, iolock); 705 mnt_drop_write_file(filp); 706 return error; 707 } 708 709 /* Return 0 on success or positive error */ 710 int 711 xfs_fsbulkstat_one_fmt( 712 struct xfs_ibulk *breq, 713 const struct xfs_bulkstat *bstat) 714 { 715 struct xfs_bstat bs1; 716 717 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat); 718 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1))) 719 return -EFAULT; 720 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat)); 721 } 722 723 int 724 xfs_fsinumbers_fmt( 725 struct xfs_ibulk *breq, 726 const struct xfs_inumbers *igrp) 727 { 728 struct xfs_inogrp ig1; 729 730 xfs_inumbers_to_inogrp(&ig1, igrp); 731 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp))) 732 return -EFAULT; 733 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp)); 734 } 735 736 STATIC int 737 xfs_ioc_fsbulkstat( 738 struct file *file, 739 unsigned int cmd, 740 void __user *arg) 741 { 742 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount; 743 struct xfs_fsop_bulkreq bulkreq; 744 struct xfs_ibulk breq = { 745 .mp = mp, 746 .mnt_userns = file_mnt_user_ns(file), 747 .ocount = 0, 748 }; 749 xfs_ino_t lastino; 750 int error; 751 752 /* done = 1 if there are more stats to get and if bulkstat */ 753 /* should be called again (unused here, but used in dmapi) */ 754 755 if (!capable(CAP_SYS_ADMIN)) 756 return -EPERM; 757 758 if (XFS_FORCED_SHUTDOWN(mp)) 759 return -EIO; 760 761 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq))) 762 return -EFAULT; 763 764 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64))) 765 return -EFAULT; 766 767 if (bulkreq.icount <= 0) 768 return -EINVAL; 769 770 if (bulkreq.ubuffer == NULL) 771 return -EINVAL; 772 773 breq.ubuffer = bulkreq.ubuffer; 774 breq.icount = bulkreq.icount; 775 776 /* 777 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number 778 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect 779 * that *lastip contains either zero or the number of the last inode to 780 * be examined by the previous call and return results starting with 781 * the next inode after that. The new bulk request back end functions 782 * take the inode to start with, so we have to compute the startino 783 * parameter from lastino to maintain correct function. lastino == 0 784 * is a special case because it has traditionally meant "first inode 785 * in filesystem". 786 */ 787 if (cmd == XFS_IOC_FSINUMBERS) { 788 breq.startino = lastino ? lastino + 1 : 0; 789 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt); 790 lastino = breq.startino - 1; 791 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) { 792 breq.startino = lastino; 793 breq.icount = 1; 794 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt); 795 } else { /* XFS_IOC_FSBULKSTAT */ 796 breq.startino = lastino ? lastino + 1 : 0; 797 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt); 798 lastino = breq.startino - 1; 799 } 800 801 if (error) 802 return error; 803 804 if (bulkreq.lastip != NULL && 805 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t))) 806 return -EFAULT; 807 808 if (bulkreq.ocount != NULL && 809 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32))) 810 return -EFAULT; 811 812 return 0; 813 } 814 815 /* Return 0 on success or positive error */ 816 static int 817 xfs_bulkstat_fmt( 818 struct xfs_ibulk *breq, 819 const struct xfs_bulkstat *bstat) 820 { 821 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat))) 822 return -EFAULT; 823 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat)); 824 } 825 826 /* 827 * Check the incoming bulk request @hdr from userspace and initialize the 828 * internal @breq bulk request appropriately. Returns 0 if the bulk request 829 * should proceed; -ECANCELED if there's nothing to do; or the usual 830 * negative error code. 831 */ 832 static int 833 xfs_bulk_ireq_setup( 834 struct xfs_mount *mp, 835 struct xfs_bulk_ireq *hdr, 836 struct xfs_ibulk *breq, 837 void __user *ubuffer) 838 { 839 if (hdr->icount == 0 || 840 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) || 841 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) 842 return -EINVAL; 843 844 breq->startino = hdr->ino; 845 breq->ubuffer = ubuffer; 846 breq->icount = hdr->icount; 847 breq->ocount = 0; 848 breq->flags = 0; 849 850 /* 851 * The @ino parameter is a special value, so we must look it up here. 852 * We're not allowed to have IREQ_AGNO, and we only return one inode 853 * worth of data. 854 */ 855 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) { 856 if (hdr->flags & XFS_BULK_IREQ_AGNO) 857 return -EINVAL; 858 859 switch (hdr->ino) { 860 case XFS_BULK_IREQ_SPECIAL_ROOT: 861 hdr->ino = mp->m_sb.sb_rootino; 862 break; 863 default: 864 return -EINVAL; 865 } 866 breq->icount = 1; 867 } 868 869 /* 870 * The IREQ_AGNO flag means that we only want results from a given AG. 871 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is 872 * beyond the specified AG then we return no results. 873 */ 874 if (hdr->flags & XFS_BULK_IREQ_AGNO) { 875 if (hdr->agno >= mp->m_sb.sb_agcount) 876 return -EINVAL; 877 878 if (breq->startino == 0) 879 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0); 880 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno) 881 return -EINVAL; 882 883 breq->flags |= XFS_IBULK_SAME_AG; 884 885 /* Asking for an inode past the end of the AG? We're done! */ 886 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno) 887 return -ECANCELED; 888 } else if (hdr->agno) 889 return -EINVAL; 890 891 /* Asking for an inode past the end of the FS? We're done! */ 892 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount) 893 return -ECANCELED; 894 895 return 0; 896 } 897 898 /* 899 * Update the userspace bulk request @hdr to reflect the end state of the 900 * internal bulk request @breq. 901 */ 902 static void 903 xfs_bulk_ireq_teardown( 904 struct xfs_bulk_ireq *hdr, 905 struct xfs_ibulk *breq) 906 { 907 hdr->ino = breq->startino; 908 hdr->ocount = breq->ocount; 909 } 910 911 /* Handle the v5 bulkstat ioctl. */ 912 STATIC int 913 xfs_ioc_bulkstat( 914 struct file *file, 915 unsigned int cmd, 916 struct xfs_bulkstat_req __user *arg) 917 { 918 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount; 919 struct xfs_bulk_ireq hdr; 920 struct xfs_ibulk breq = { 921 .mp = mp, 922 .mnt_userns = file_mnt_user_ns(file), 923 }; 924 int error; 925 926 if (!capable(CAP_SYS_ADMIN)) 927 return -EPERM; 928 929 if (XFS_FORCED_SHUTDOWN(mp)) 930 return -EIO; 931 932 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 933 return -EFAULT; 934 935 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat); 936 if (error == -ECANCELED) 937 goto out_teardown; 938 if (error < 0) 939 return error; 940 941 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt); 942 if (error) 943 return error; 944 945 out_teardown: 946 xfs_bulk_ireq_teardown(&hdr, &breq); 947 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 948 return -EFAULT; 949 950 return 0; 951 } 952 953 STATIC int 954 xfs_inumbers_fmt( 955 struct xfs_ibulk *breq, 956 const struct xfs_inumbers *igrp) 957 { 958 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers))) 959 return -EFAULT; 960 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers)); 961 } 962 963 /* Handle the v5 inumbers ioctl. */ 964 STATIC int 965 xfs_ioc_inumbers( 966 struct xfs_mount *mp, 967 unsigned int cmd, 968 struct xfs_inumbers_req __user *arg) 969 { 970 struct xfs_bulk_ireq hdr; 971 struct xfs_ibulk breq = { 972 .mp = mp, 973 }; 974 int error; 975 976 if (!capable(CAP_SYS_ADMIN)) 977 return -EPERM; 978 979 if (XFS_FORCED_SHUTDOWN(mp)) 980 return -EIO; 981 982 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 983 return -EFAULT; 984 985 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers); 986 if (error == -ECANCELED) 987 goto out_teardown; 988 if (error < 0) 989 return error; 990 991 error = xfs_inumbers(&breq, xfs_inumbers_fmt); 992 if (error) 993 return error; 994 995 out_teardown: 996 xfs_bulk_ireq_teardown(&hdr, &breq); 997 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 998 return -EFAULT; 999 1000 return 0; 1001 } 1002 1003 STATIC int 1004 xfs_ioc_fsgeometry( 1005 struct xfs_mount *mp, 1006 void __user *arg, 1007 int struct_version) 1008 { 1009 struct xfs_fsop_geom fsgeo; 1010 size_t len; 1011 1012 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version); 1013 1014 if (struct_version <= 3) 1015 len = sizeof(struct xfs_fsop_geom_v1); 1016 else if (struct_version == 4) 1017 len = sizeof(struct xfs_fsop_geom_v4); 1018 else { 1019 xfs_fsop_geom_health(mp, &fsgeo); 1020 len = sizeof(fsgeo); 1021 } 1022 1023 if (copy_to_user(arg, &fsgeo, len)) 1024 return -EFAULT; 1025 return 0; 1026 } 1027 1028 STATIC int 1029 xfs_ioc_ag_geometry( 1030 struct xfs_mount *mp, 1031 void __user *arg) 1032 { 1033 struct xfs_ag_geometry ageo; 1034 int error; 1035 1036 if (copy_from_user(&ageo, arg, sizeof(ageo))) 1037 return -EFAULT; 1038 if (ageo.ag_flags) 1039 return -EINVAL; 1040 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved))) 1041 return -EINVAL; 1042 1043 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo); 1044 if (error) 1045 return error; 1046 1047 if (copy_to_user(arg, &ageo, sizeof(ageo))) 1048 return -EFAULT; 1049 return 0; 1050 } 1051 1052 /* 1053 * Linux extended inode flags interface. 1054 */ 1055 1056 STATIC unsigned int 1057 xfs_merge_ioc_xflags( 1058 unsigned int flags, 1059 unsigned int start) 1060 { 1061 unsigned int xflags = start; 1062 1063 if (flags & FS_IMMUTABLE_FL) 1064 xflags |= FS_XFLAG_IMMUTABLE; 1065 else 1066 xflags &= ~FS_XFLAG_IMMUTABLE; 1067 if (flags & FS_APPEND_FL) 1068 xflags |= FS_XFLAG_APPEND; 1069 else 1070 xflags &= ~FS_XFLAG_APPEND; 1071 if (flags & FS_SYNC_FL) 1072 xflags |= FS_XFLAG_SYNC; 1073 else 1074 xflags &= ~FS_XFLAG_SYNC; 1075 if (flags & FS_NOATIME_FL) 1076 xflags |= FS_XFLAG_NOATIME; 1077 else 1078 xflags &= ~FS_XFLAG_NOATIME; 1079 if (flags & FS_NODUMP_FL) 1080 xflags |= FS_XFLAG_NODUMP; 1081 else 1082 xflags &= ~FS_XFLAG_NODUMP; 1083 if (flags & FS_DAX_FL) 1084 xflags |= FS_XFLAG_DAX; 1085 else 1086 xflags &= ~FS_XFLAG_DAX; 1087 1088 return xflags; 1089 } 1090 1091 STATIC unsigned int 1092 xfs_di2lxflags( 1093 uint16_t di_flags, 1094 uint64_t di_flags2) 1095 { 1096 unsigned int flags = 0; 1097 1098 if (di_flags & XFS_DIFLAG_IMMUTABLE) 1099 flags |= FS_IMMUTABLE_FL; 1100 if (di_flags & XFS_DIFLAG_APPEND) 1101 flags |= FS_APPEND_FL; 1102 if (di_flags & XFS_DIFLAG_SYNC) 1103 flags |= FS_SYNC_FL; 1104 if (di_flags & XFS_DIFLAG_NOATIME) 1105 flags |= FS_NOATIME_FL; 1106 if (di_flags & XFS_DIFLAG_NODUMP) 1107 flags |= FS_NODUMP_FL; 1108 if (di_flags2 & XFS_DIFLAG2_DAX) { 1109 flags |= FS_DAX_FL; 1110 } 1111 return flags; 1112 } 1113 1114 static void 1115 xfs_fill_fsxattr( 1116 struct xfs_inode *ip, 1117 bool attr, 1118 struct fsxattr *fa) 1119 { 1120 struct xfs_ifork *ifp = attr ? ip->i_afp : &ip->i_df; 1121 1122 simple_fill_fsxattr(fa, xfs_ip2xflags(ip)); 1123 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 1124 fa->fsx_cowextsize = ip->i_d.di_cowextsize << 1125 ip->i_mount->m_sb.sb_blocklog; 1126 fa->fsx_projid = ip->i_d.di_projid; 1127 if (ifp && (ifp->if_flags & XFS_IFEXTENTS)) 1128 fa->fsx_nextents = xfs_iext_count(ifp); 1129 else 1130 fa->fsx_nextents = xfs_ifork_nextents(ifp); 1131 } 1132 1133 STATIC int 1134 xfs_ioc_fsgetxattr( 1135 xfs_inode_t *ip, 1136 int attr, 1137 void __user *arg) 1138 { 1139 struct fsxattr fa; 1140 1141 xfs_ilock(ip, XFS_ILOCK_SHARED); 1142 xfs_fill_fsxattr(ip, attr, &fa); 1143 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1144 1145 if (copy_to_user(arg, &fa, sizeof(fa))) 1146 return -EFAULT; 1147 return 0; 1148 } 1149 1150 STATIC uint16_t 1151 xfs_flags2diflags( 1152 struct xfs_inode *ip, 1153 unsigned int xflags) 1154 { 1155 /* can't set PREALLOC this way, just preserve it */ 1156 uint16_t di_flags = 1157 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 1158 1159 if (xflags & FS_XFLAG_IMMUTABLE) 1160 di_flags |= XFS_DIFLAG_IMMUTABLE; 1161 if (xflags & FS_XFLAG_APPEND) 1162 di_flags |= XFS_DIFLAG_APPEND; 1163 if (xflags & FS_XFLAG_SYNC) 1164 di_flags |= XFS_DIFLAG_SYNC; 1165 if (xflags & FS_XFLAG_NOATIME) 1166 di_flags |= XFS_DIFLAG_NOATIME; 1167 if (xflags & FS_XFLAG_NODUMP) 1168 di_flags |= XFS_DIFLAG_NODUMP; 1169 if (xflags & FS_XFLAG_NODEFRAG) 1170 di_flags |= XFS_DIFLAG_NODEFRAG; 1171 if (xflags & FS_XFLAG_FILESTREAM) 1172 di_flags |= XFS_DIFLAG_FILESTREAM; 1173 if (S_ISDIR(VFS_I(ip)->i_mode)) { 1174 if (xflags & FS_XFLAG_RTINHERIT) 1175 di_flags |= XFS_DIFLAG_RTINHERIT; 1176 if (xflags & FS_XFLAG_NOSYMLINKS) 1177 di_flags |= XFS_DIFLAG_NOSYMLINKS; 1178 if (xflags & FS_XFLAG_EXTSZINHERIT) 1179 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 1180 if (xflags & FS_XFLAG_PROJINHERIT) 1181 di_flags |= XFS_DIFLAG_PROJINHERIT; 1182 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 1183 if (xflags & FS_XFLAG_REALTIME) 1184 di_flags |= XFS_DIFLAG_REALTIME; 1185 if (xflags & FS_XFLAG_EXTSIZE) 1186 di_flags |= XFS_DIFLAG_EXTSIZE; 1187 } 1188 1189 return di_flags; 1190 } 1191 1192 STATIC uint64_t 1193 xfs_flags2diflags2( 1194 struct xfs_inode *ip, 1195 unsigned int xflags) 1196 { 1197 uint64_t di_flags2 = 1198 (ip->i_d.di_flags2 & (XFS_DIFLAG2_REFLINK | 1199 XFS_DIFLAG2_BIGTIME)); 1200 1201 if (xflags & FS_XFLAG_DAX) 1202 di_flags2 |= XFS_DIFLAG2_DAX; 1203 if (xflags & FS_XFLAG_COWEXTSIZE) 1204 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 1205 1206 return di_flags2; 1207 } 1208 1209 static int 1210 xfs_ioctl_setattr_xflags( 1211 struct xfs_trans *tp, 1212 struct xfs_inode *ip, 1213 struct fsxattr *fa) 1214 { 1215 struct xfs_mount *mp = ip->i_mount; 1216 uint64_t di_flags2; 1217 1218 /* Can't change realtime flag if any extents are allocated. */ 1219 if ((ip->i_df.if_nextents || ip->i_delayed_blks) && 1220 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1221 return -EINVAL; 1222 1223 /* If realtime flag is set then must have realtime device */ 1224 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1225 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1226 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1227 return -EINVAL; 1228 } 1229 1230 /* Clear reflink if we are actually able to set the rt flag. */ 1231 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1232 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; 1233 1234 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1235 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1236 return -EINVAL; 1237 1238 /* diflags2 only valid for v3 inodes. */ 1239 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1240 if (di_flags2 && !xfs_sb_version_has_v3inode(&mp->m_sb)) 1241 return -EINVAL; 1242 1243 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags); 1244 ip->i_d.di_flags2 = di_flags2; 1245 1246 xfs_diflags_to_iflags(ip, false); 1247 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1248 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1249 XFS_STATS_INC(mp, xs_ig_attrchg); 1250 return 0; 1251 } 1252 1253 static void 1254 xfs_ioctl_setattr_prepare_dax( 1255 struct xfs_inode *ip, 1256 struct fsxattr *fa) 1257 { 1258 struct xfs_mount *mp = ip->i_mount; 1259 struct inode *inode = VFS_I(ip); 1260 1261 if (S_ISDIR(inode->i_mode)) 1262 return; 1263 1264 if ((mp->m_flags & XFS_MOUNT_DAX_ALWAYS) || 1265 (mp->m_flags & XFS_MOUNT_DAX_NEVER)) 1266 return; 1267 1268 if (((fa->fsx_xflags & FS_XFLAG_DAX) && 1269 !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) || 1270 (!(fa->fsx_xflags & FS_XFLAG_DAX) && 1271 (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))) 1272 d_mark_dontcache(inode); 1273 } 1274 1275 /* 1276 * Set up the transaction structure for the setattr operation, checking that we 1277 * have permission to do so. On success, return a clean transaction and the 1278 * inode locked exclusively ready for further operation specific checks. On 1279 * failure, return an error without modifying or locking the inode. 1280 */ 1281 static struct xfs_trans * 1282 xfs_ioctl_setattr_get_trans( 1283 struct file *file) 1284 { 1285 struct xfs_inode *ip = XFS_I(file_inode(file)); 1286 struct xfs_mount *mp = ip->i_mount; 1287 struct xfs_trans *tp; 1288 int error = -EROFS; 1289 1290 if (mp->m_flags & XFS_MOUNT_RDONLY) 1291 goto out_unlock; 1292 error = -EIO; 1293 if (XFS_FORCED_SHUTDOWN(mp)) 1294 goto out_unlock; 1295 1296 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1297 if (error) 1298 goto out_unlock; 1299 1300 xfs_ilock(ip, XFS_ILOCK_EXCL); 1301 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 1302 1303 /* 1304 * CAP_FOWNER overrides the following restrictions: 1305 * 1306 * The user ID of the calling process must be equal to the file owner 1307 * ID, except in cases where the CAP_FSETID capability is applicable. 1308 */ 1309 if (!inode_owner_or_capable(file_mnt_user_ns(file), VFS_I(ip))) { 1310 error = -EPERM; 1311 goto out_cancel; 1312 } 1313 1314 if (mp->m_flags & XFS_MOUNT_WSYNC) 1315 xfs_trans_set_sync(tp); 1316 1317 return tp; 1318 1319 out_cancel: 1320 xfs_trans_cancel(tp); 1321 out_unlock: 1322 return ERR_PTR(error); 1323 } 1324 1325 /* 1326 * extent size hint validation is somewhat cumbersome. Rules are: 1327 * 1328 * 1. extent size hint is only valid for directories and regular files 1329 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1330 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1331 * 4. can only be changed on regular files if no extents are allocated 1332 * 5. can be changed on directories at any time 1333 * 6. extsize hint of 0 turns off hints, clears inode flags. 1334 * 7. Extent size must be a multiple of the appropriate block size. 1335 * 8. for non-realtime files, the extent size hint must be limited 1336 * to half the AG size to avoid alignment extending the extent beyond the 1337 * limits of the AG. 1338 * 1339 * Please keep this function in sync with xfs_scrub_inode_extsize. 1340 */ 1341 static int 1342 xfs_ioctl_setattr_check_extsize( 1343 struct xfs_inode *ip, 1344 struct fsxattr *fa) 1345 { 1346 struct xfs_mount *mp = ip->i_mount; 1347 xfs_extlen_t size; 1348 xfs_fsblock_t extsize_fsb; 1349 1350 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents && 1351 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1352 return -EINVAL; 1353 1354 if (fa->fsx_extsize == 0) 1355 return 0; 1356 1357 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1358 if (extsize_fsb > MAXEXTLEN) 1359 return -EINVAL; 1360 1361 if (XFS_IS_REALTIME_INODE(ip) || 1362 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1363 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1364 } else { 1365 size = mp->m_sb.sb_blocksize; 1366 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1367 return -EINVAL; 1368 } 1369 1370 if (fa->fsx_extsize % size) 1371 return -EINVAL; 1372 1373 return 0; 1374 } 1375 1376 /* 1377 * CoW extent size hint validation rules are: 1378 * 1379 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1380 * The inode does not have to have any shared blocks, but it must be a v3. 1381 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1382 * for a directory, the hint is propagated to new files. 1383 * 3. Can be changed on files & directories at any time. 1384 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1385 * 5. Extent size must be a multiple of the appropriate block size. 1386 * 6. The extent size hint must be limited to half the AG size to avoid 1387 * alignment extending the extent beyond the limits of the AG. 1388 * 1389 * Please keep this function in sync with xfs_scrub_inode_cowextsize. 1390 */ 1391 static int 1392 xfs_ioctl_setattr_check_cowextsize( 1393 struct xfs_inode *ip, 1394 struct fsxattr *fa) 1395 { 1396 struct xfs_mount *mp = ip->i_mount; 1397 xfs_extlen_t size; 1398 xfs_fsblock_t cowextsize_fsb; 1399 1400 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1401 return 0; 1402 1403 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb)) 1404 return -EINVAL; 1405 1406 if (fa->fsx_cowextsize == 0) 1407 return 0; 1408 1409 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1410 if (cowextsize_fsb > MAXEXTLEN) 1411 return -EINVAL; 1412 1413 size = mp->m_sb.sb_blocksize; 1414 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1415 return -EINVAL; 1416 1417 if (fa->fsx_cowextsize % size) 1418 return -EINVAL; 1419 1420 return 0; 1421 } 1422 1423 static int 1424 xfs_ioctl_setattr_check_projid( 1425 struct xfs_inode *ip, 1426 struct fsxattr *fa) 1427 { 1428 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1429 if (fa->fsx_projid > (uint16_t)-1 && 1430 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1431 return -EINVAL; 1432 return 0; 1433 } 1434 1435 STATIC int 1436 xfs_ioctl_setattr( 1437 struct file *file, 1438 struct fsxattr *fa) 1439 { 1440 struct user_namespace *mnt_userns = file_mnt_user_ns(file); 1441 struct xfs_inode *ip = XFS_I(file_inode(file)); 1442 struct fsxattr old_fa; 1443 struct xfs_mount *mp = ip->i_mount; 1444 struct xfs_trans *tp; 1445 struct xfs_dquot *pdqp = NULL; 1446 struct xfs_dquot *olddquot = NULL; 1447 int code; 1448 1449 trace_xfs_ioctl_setattr(ip); 1450 1451 code = xfs_ioctl_setattr_check_projid(ip, fa); 1452 if (code) 1453 return code; 1454 1455 /* 1456 * If disk quotas is on, we make sure that the dquots do exist on disk, 1457 * before we start any other transactions. Trying to do this later 1458 * is messy. We don't care to take a readlock to look at the ids 1459 * in inode here, because we can't hold it across the trans_reserve. 1460 * If the IDs do change before we take the ilock, we're covered 1461 * because the i_*dquot fields will get updated anyway. 1462 */ 1463 if (XFS_IS_QUOTA_ON(mp)) { 1464 code = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid, 1465 VFS_I(ip)->i_gid, fa->fsx_projid, 1466 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp); 1467 if (code) 1468 return code; 1469 } 1470 1471 xfs_ioctl_setattr_prepare_dax(ip, fa); 1472 1473 tp = xfs_ioctl_setattr_get_trans(file); 1474 if (IS_ERR(tp)) { 1475 code = PTR_ERR(tp); 1476 goto error_free_dquots; 1477 } 1478 1479 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1480 ip->i_d.di_projid != fa->fsx_projid) { 1481 code = xfs_qm_vop_chown_reserve(tp, ip, NULL, NULL, pdqp, 1482 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1483 if (code) /* out of quota */ 1484 goto error_trans_cancel; 1485 } 1486 1487 xfs_fill_fsxattr(ip, false, &old_fa); 1488 code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa); 1489 if (code) 1490 goto error_trans_cancel; 1491 1492 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1493 if (code) 1494 goto error_trans_cancel; 1495 1496 code = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1497 if (code) 1498 goto error_trans_cancel; 1499 1500 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1501 if (code) 1502 goto error_trans_cancel; 1503 1504 /* 1505 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1506 * overrides the following restrictions: 1507 * 1508 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1509 * successful return from chown() 1510 */ 1511 1512 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1513 !capable_wrt_inode_uidgid(mnt_userns, VFS_I(ip), CAP_FSETID)) 1514 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1515 1516 /* Change the ownerships and register project quota modifications */ 1517 if (ip->i_d.di_projid != fa->fsx_projid) { 1518 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1519 olddquot = xfs_qm_vop_chown(tp, ip, 1520 &ip->i_pdquot, pdqp); 1521 } 1522 ip->i_d.di_projid = fa->fsx_projid; 1523 } 1524 1525 /* 1526 * Only set the extent size hint if we've already determined that the 1527 * extent size hint should be set on the inode. If no extent size flags 1528 * are set on the inode then unconditionally clear the extent size hint. 1529 */ 1530 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1531 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1532 else 1533 ip->i_d.di_extsize = 0; 1534 if (xfs_sb_version_has_v3inode(&mp->m_sb) && 1535 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) 1536 ip->i_d.di_cowextsize = fa->fsx_cowextsize >> 1537 mp->m_sb.sb_blocklog; 1538 else 1539 ip->i_d.di_cowextsize = 0; 1540 1541 code = xfs_trans_commit(tp); 1542 1543 /* 1544 * Release any dquot(s) the inode had kept before chown. 1545 */ 1546 xfs_qm_dqrele(olddquot); 1547 xfs_qm_dqrele(pdqp); 1548 1549 return code; 1550 1551 error_trans_cancel: 1552 xfs_trans_cancel(tp); 1553 error_free_dquots: 1554 xfs_qm_dqrele(pdqp); 1555 return code; 1556 } 1557 1558 STATIC int 1559 xfs_ioc_fssetxattr( 1560 struct file *filp, 1561 void __user *arg) 1562 { 1563 struct fsxattr fa; 1564 int error; 1565 1566 if (copy_from_user(&fa, arg, sizeof(fa))) 1567 return -EFAULT; 1568 1569 error = mnt_want_write_file(filp); 1570 if (error) 1571 return error; 1572 error = xfs_ioctl_setattr(filp, &fa); 1573 mnt_drop_write_file(filp); 1574 return error; 1575 } 1576 1577 STATIC int 1578 xfs_ioc_getxflags( 1579 xfs_inode_t *ip, 1580 void __user *arg) 1581 { 1582 unsigned int flags; 1583 1584 flags = xfs_di2lxflags(ip->i_d.di_flags, ip->i_d.di_flags2); 1585 if (copy_to_user(arg, &flags, sizeof(flags))) 1586 return -EFAULT; 1587 return 0; 1588 } 1589 1590 STATIC int 1591 xfs_ioc_setxflags( 1592 struct xfs_inode *ip, 1593 struct file *filp, 1594 void __user *arg) 1595 { 1596 struct xfs_trans *tp; 1597 struct fsxattr fa; 1598 struct fsxattr old_fa; 1599 unsigned int flags; 1600 int error; 1601 1602 if (copy_from_user(&flags, arg, sizeof(flags))) 1603 return -EFAULT; 1604 1605 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1606 FS_NOATIME_FL | FS_NODUMP_FL | \ 1607 FS_SYNC_FL | FS_DAX_FL)) 1608 return -EOPNOTSUPP; 1609 1610 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1611 1612 error = mnt_want_write_file(filp); 1613 if (error) 1614 return error; 1615 1616 xfs_ioctl_setattr_prepare_dax(ip, &fa); 1617 1618 tp = xfs_ioctl_setattr_get_trans(filp); 1619 if (IS_ERR(tp)) { 1620 error = PTR_ERR(tp); 1621 goto out_drop_write; 1622 } 1623 1624 xfs_fill_fsxattr(ip, false, &old_fa); 1625 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa); 1626 if (error) { 1627 xfs_trans_cancel(tp); 1628 goto out_drop_write; 1629 } 1630 1631 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1632 if (error) { 1633 xfs_trans_cancel(tp); 1634 goto out_drop_write; 1635 } 1636 1637 error = xfs_trans_commit(tp); 1638 out_drop_write: 1639 mnt_drop_write_file(filp); 1640 return error; 1641 } 1642 1643 static bool 1644 xfs_getbmap_format( 1645 struct kgetbmap *p, 1646 struct getbmapx __user *u, 1647 size_t recsize) 1648 { 1649 if (put_user(p->bmv_offset, &u->bmv_offset) || 1650 put_user(p->bmv_block, &u->bmv_block) || 1651 put_user(p->bmv_length, &u->bmv_length) || 1652 put_user(0, &u->bmv_count) || 1653 put_user(0, &u->bmv_entries)) 1654 return false; 1655 if (recsize < sizeof(struct getbmapx)) 1656 return true; 1657 if (put_user(0, &u->bmv_iflags) || 1658 put_user(p->bmv_oflags, &u->bmv_oflags) || 1659 put_user(0, &u->bmv_unused1) || 1660 put_user(0, &u->bmv_unused2)) 1661 return false; 1662 return true; 1663 } 1664 1665 STATIC int 1666 xfs_ioc_getbmap( 1667 struct file *file, 1668 unsigned int cmd, 1669 void __user *arg) 1670 { 1671 struct getbmapx bmx = { 0 }; 1672 struct kgetbmap *buf; 1673 size_t recsize; 1674 int error, i; 1675 1676 switch (cmd) { 1677 case XFS_IOC_GETBMAPA: 1678 bmx.bmv_iflags = BMV_IF_ATTRFORK; 1679 /*FALLTHRU*/ 1680 case XFS_IOC_GETBMAP: 1681 if (file->f_mode & FMODE_NOCMTIME) 1682 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1683 /* struct getbmap is a strict subset of struct getbmapx. */ 1684 recsize = sizeof(struct getbmap); 1685 break; 1686 case XFS_IOC_GETBMAPX: 1687 recsize = sizeof(struct getbmapx); 1688 break; 1689 default: 1690 return -EINVAL; 1691 } 1692 1693 if (copy_from_user(&bmx, arg, recsize)) 1694 return -EFAULT; 1695 1696 if (bmx.bmv_count < 2) 1697 return -EINVAL; 1698 if (bmx.bmv_count > ULONG_MAX / recsize) 1699 return -ENOMEM; 1700 1701 buf = kvzalloc(bmx.bmv_count * sizeof(*buf), GFP_KERNEL); 1702 if (!buf) 1703 return -ENOMEM; 1704 1705 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 1706 if (error) 1707 goto out_free_buf; 1708 1709 error = -EFAULT; 1710 if (copy_to_user(arg, &bmx, recsize)) 1711 goto out_free_buf; 1712 arg += recsize; 1713 1714 for (i = 0; i < bmx.bmv_entries; i++) { 1715 if (!xfs_getbmap_format(buf + i, arg, recsize)) 1716 goto out_free_buf; 1717 arg += recsize; 1718 } 1719 1720 error = 0; 1721 out_free_buf: 1722 kmem_free(buf); 1723 return error; 1724 } 1725 1726 STATIC int 1727 xfs_ioc_getfsmap( 1728 struct xfs_inode *ip, 1729 struct fsmap_head __user *arg) 1730 { 1731 struct xfs_fsmap_head xhead = {0}; 1732 struct fsmap_head head; 1733 struct fsmap *recs; 1734 unsigned int count; 1735 __u32 last_flags = 0; 1736 bool done = false; 1737 int error; 1738 1739 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1740 return -EFAULT; 1741 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1742 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1743 sizeof(head.fmh_keys[0].fmr_reserved)) || 1744 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1745 sizeof(head.fmh_keys[1].fmr_reserved))) 1746 return -EINVAL; 1747 1748 /* 1749 * Use an internal memory buffer so that we don't have to copy fsmap 1750 * data to userspace while holding locks. Start by trying to allocate 1751 * up to 128k for the buffer, but fall back to a single page if needed. 1752 */ 1753 count = min_t(unsigned int, head.fmh_count, 1754 131072 / sizeof(struct fsmap)); 1755 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL); 1756 if (!recs) { 1757 count = min_t(unsigned int, head.fmh_count, 1758 PAGE_SIZE / sizeof(struct fsmap)); 1759 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL); 1760 if (!recs) 1761 return -ENOMEM; 1762 } 1763 1764 xhead.fmh_iflags = head.fmh_iflags; 1765 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1766 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1767 1768 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1769 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1770 1771 head.fmh_entries = 0; 1772 do { 1773 struct fsmap __user *user_recs; 1774 struct fsmap *last_rec; 1775 1776 user_recs = &arg->fmh_recs[head.fmh_entries]; 1777 xhead.fmh_entries = 0; 1778 xhead.fmh_count = min_t(unsigned int, count, 1779 head.fmh_count - head.fmh_entries); 1780 1781 /* Run query, record how many entries we got. */ 1782 error = xfs_getfsmap(ip->i_mount, &xhead, recs); 1783 switch (error) { 1784 case 0: 1785 /* 1786 * There are no more records in the result set. Copy 1787 * whatever we got to userspace and break out. 1788 */ 1789 done = true; 1790 break; 1791 case -ECANCELED: 1792 /* 1793 * The internal memory buffer is full. Copy whatever 1794 * records we got to userspace and go again if we have 1795 * not yet filled the userspace buffer. 1796 */ 1797 error = 0; 1798 break; 1799 default: 1800 goto out_free; 1801 } 1802 head.fmh_entries += xhead.fmh_entries; 1803 head.fmh_oflags = xhead.fmh_oflags; 1804 1805 /* 1806 * If the caller wanted a record count or there aren't any 1807 * new records to return, we're done. 1808 */ 1809 if (head.fmh_count == 0 || xhead.fmh_entries == 0) 1810 break; 1811 1812 /* Copy all the records we got out to userspace. */ 1813 if (copy_to_user(user_recs, recs, 1814 xhead.fmh_entries * sizeof(struct fsmap))) { 1815 error = -EFAULT; 1816 goto out_free; 1817 } 1818 1819 /* Remember the last record flags we copied to userspace. */ 1820 last_rec = &recs[xhead.fmh_entries - 1]; 1821 last_flags = last_rec->fmr_flags; 1822 1823 /* Set up the low key for the next iteration. */ 1824 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec); 1825 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1826 } while (!done && head.fmh_entries < head.fmh_count); 1827 1828 /* 1829 * If there are no more records in the query result set and we're not 1830 * in counting mode, mark the last record returned with the LAST flag. 1831 */ 1832 if (done && head.fmh_count > 0 && head.fmh_entries > 0) { 1833 struct fsmap __user *user_rec; 1834 1835 last_flags |= FMR_OF_LAST; 1836 user_rec = &arg->fmh_recs[head.fmh_entries - 1]; 1837 1838 if (copy_to_user(&user_rec->fmr_flags, &last_flags, 1839 sizeof(last_flags))) { 1840 error = -EFAULT; 1841 goto out_free; 1842 } 1843 } 1844 1845 /* copy back header */ 1846 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) { 1847 error = -EFAULT; 1848 goto out_free; 1849 } 1850 1851 out_free: 1852 kmem_free(recs); 1853 return error; 1854 } 1855 1856 STATIC int 1857 xfs_ioc_scrub_metadata( 1858 struct xfs_inode *ip, 1859 void __user *arg) 1860 { 1861 struct xfs_scrub_metadata scrub; 1862 int error; 1863 1864 if (!capable(CAP_SYS_ADMIN)) 1865 return -EPERM; 1866 1867 if (copy_from_user(&scrub, arg, sizeof(scrub))) 1868 return -EFAULT; 1869 1870 error = xfs_scrub_metadata(ip, &scrub); 1871 if (error) 1872 return error; 1873 1874 if (copy_to_user(arg, &scrub, sizeof(scrub))) 1875 return -EFAULT; 1876 1877 return 0; 1878 } 1879 1880 int 1881 xfs_ioc_swapext( 1882 xfs_swapext_t *sxp) 1883 { 1884 xfs_inode_t *ip, *tip; 1885 struct fd f, tmp; 1886 int error = 0; 1887 1888 /* Pull information for the target fd */ 1889 f = fdget((int)sxp->sx_fdtarget); 1890 if (!f.file) { 1891 error = -EINVAL; 1892 goto out; 1893 } 1894 1895 if (!(f.file->f_mode & FMODE_WRITE) || 1896 !(f.file->f_mode & FMODE_READ) || 1897 (f.file->f_flags & O_APPEND)) { 1898 error = -EBADF; 1899 goto out_put_file; 1900 } 1901 1902 tmp = fdget((int)sxp->sx_fdtmp); 1903 if (!tmp.file) { 1904 error = -EINVAL; 1905 goto out_put_file; 1906 } 1907 1908 if (!(tmp.file->f_mode & FMODE_WRITE) || 1909 !(tmp.file->f_mode & FMODE_READ) || 1910 (tmp.file->f_flags & O_APPEND)) { 1911 error = -EBADF; 1912 goto out_put_tmp_file; 1913 } 1914 1915 if (IS_SWAPFILE(file_inode(f.file)) || 1916 IS_SWAPFILE(file_inode(tmp.file))) { 1917 error = -EINVAL; 1918 goto out_put_tmp_file; 1919 } 1920 1921 /* 1922 * We need to ensure that the fds passed in point to XFS inodes 1923 * before we cast and access them as XFS structures as we have no 1924 * control over what the user passes us here. 1925 */ 1926 if (f.file->f_op != &xfs_file_operations || 1927 tmp.file->f_op != &xfs_file_operations) { 1928 error = -EINVAL; 1929 goto out_put_tmp_file; 1930 } 1931 1932 ip = XFS_I(file_inode(f.file)); 1933 tip = XFS_I(file_inode(tmp.file)); 1934 1935 if (ip->i_mount != tip->i_mount) { 1936 error = -EINVAL; 1937 goto out_put_tmp_file; 1938 } 1939 1940 if (ip->i_ino == tip->i_ino) { 1941 error = -EINVAL; 1942 goto out_put_tmp_file; 1943 } 1944 1945 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1946 error = -EIO; 1947 goto out_put_tmp_file; 1948 } 1949 1950 error = xfs_swap_extents(ip, tip, sxp); 1951 1952 out_put_tmp_file: 1953 fdput(tmp); 1954 out_put_file: 1955 fdput(f); 1956 out: 1957 return error; 1958 } 1959 1960 static int 1961 xfs_ioc_getlabel( 1962 struct xfs_mount *mp, 1963 char __user *user_label) 1964 { 1965 struct xfs_sb *sbp = &mp->m_sb; 1966 char label[XFSLABEL_MAX + 1]; 1967 1968 /* Paranoia */ 1969 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 1970 1971 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 1972 memset(label, 0, sizeof(label)); 1973 spin_lock(&mp->m_sb_lock); 1974 strncpy(label, sbp->sb_fname, XFSLABEL_MAX); 1975 spin_unlock(&mp->m_sb_lock); 1976 1977 if (copy_to_user(user_label, label, sizeof(label))) 1978 return -EFAULT; 1979 return 0; 1980 } 1981 1982 static int 1983 xfs_ioc_setlabel( 1984 struct file *filp, 1985 struct xfs_mount *mp, 1986 char __user *newlabel) 1987 { 1988 struct xfs_sb *sbp = &mp->m_sb; 1989 char label[XFSLABEL_MAX + 1]; 1990 size_t len; 1991 int error; 1992 1993 if (!capable(CAP_SYS_ADMIN)) 1994 return -EPERM; 1995 /* 1996 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 1997 * smaller, at 12 bytes. We copy one more to be sure we find the 1998 * (required) NULL character to test the incoming label length. 1999 * NB: The on disk label doesn't need to be null terminated. 2000 */ 2001 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 2002 return -EFAULT; 2003 len = strnlen(label, XFSLABEL_MAX + 1); 2004 if (len > sizeof(sbp->sb_fname)) 2005 return -EINVAL; 2006 2007 error = mnt_want_write_file(filp); 2008 if (error) 2009 return error; 2010 2011 spin_lock(&mp->m_sb_lock); 2012 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 2013 memcpy(sbp->sb_fname, label, len); 2014 spin_unlock(&mp->m_sb_lock); 2015 2016 /* 2017 * Now we do several things to satisfy userspace. 2018 * In addition to normal logging of the primary superblock, we also 2019 * immediately write these changes to sector zero for the primary, then 2020 * update all backup supers (as xfs_db does for a label change), then 2021 * invalidate the block device page cache. This is so that any prior 2022 * buffered reads from userspace (i.e. from blkid) are invalidated, 2023 * and userspace will see the newly-written label. 2024 */ 2025 error = xfs_sync_sb_buf(mp); 2026 if (error) 2027 goto out; 2028 /* 2029 * growfs also updates backup supers so lock against that. 2030 */ 2031 mutex_lock(&mp->m_growlock); 2032 error = xfs_update_secondary_sbs(mp); 2033 mutex_unlock(&mp->m_growlock); 2034 2035 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 2036 2037 out: 2038 mnt_drop_write_file(filp); 2039 return error; 2040 } 2041 2042 static inline int 2043 xfs_fs_eofblocks_from_user( 2044 struct xfs_fs_eofblocks *src, 2045 struct xfs_eofblocks *dst) 2046 { 2047 if (src->eof_version != XFS_EOFBLOCKS_VERSION) 2048 return -EINVAL; 2049 2050 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID) 2051 return -EINVAL; 2052 2053 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) || 2054 memchr_inv(src->pad64, 0, sizeof(src->pad64))) 2055 return -EINVAL; 2056 2057 dst->eof_flags = src->eof_flags; 2058 dst->eof_prid = src->eof_prid; 2059 dst->eof_min_file_size = src->eof_min_file_size; 2060 2061 dst->eof_uid = INVALID_UID; 2062 if (src->eof_flags & XFS_EOF_FLAGS_UID) { 2063 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid); 2064 if (!uid_valid(dst->eof_uid)) 2065 return -EINVAL; 2066 } 2067 2068 dst->eof_gid = INVALID_GID; 2069 if (src->eof_flags & XFS_EOF_FLAGS_GID) { 2070 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid); 2071 if (!gid_valid(dst->eof_gid)) 2072 return -EINVAL; 2073 } 2074 return 0; 2075 } 2076 2077 /* 2078 * Note: some of the ioctl's return positive numbers as a 2079 * byte count indicating success, such as readlink_by_handle. 2080 * So we don't "sign flip" like most other routines. This means 2081 * true errors need to be returned as a negative value. 2082 */ 2083 long 2084 xfs_file_ioctl( 2085 struct file *filp, 2086 unsigned int cmd, 2087 unsigned long p) 2088 { 2089 struct inode *inode = file_inode(filp); 2090 struct xfs_inode *ip = XFS_I(inode); 2091 struct xfs_mount *mp = ip->i_mount; 2092 void __user *arg = (void __user *)p; 2093 int error; 2094 2095 trace_xfs_file_ioctl(ip); 2096 2097 switch (cmd) { 2098 case FITRIM: 2099 return xfs_ioc_trim(mp, arg); 2100 case FS_IOC_GETFSLABEL: 2101 return xfs_ioc_getlabel(mp, arg); 2102 case FS_IOC_SETFSLABEL: 2103 return xfs_ioc_setlabel(filp, mp, arg); 2104 case XFS_IOC_ALLOCSP: 2105 case XFS_IOC_FREESP: 2106 case XFS_IOC_ALLOCSP64: 2107 case XFS_IOC_FREESP64: { 2108 xfs_flock64_t bf; 2109 2110 if (copy_from_user(&bf, arg, sizeof(bf))) 2111 return -EFAULT; 2112 return xfs_ioc_space(filp, &bf); 2113 } 2114 case XFS_IOC_DIOINFO: { 2115 struct xfs_buftarg *target = xfs_inode_buftarg(ip); 2116 struct dioattr da; 2117 2118 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 2119 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 2120 2121 if (copy_to_user(arg, &da, sizeof(da))) 2122 return -EFAULT; 2123 return 0; 2124 } 2125 2126 case XFS_IOC_FSBULKSTAT_SINGLE: 2127 case XFS_IOC_FSBULKSTAT: 2128 case XFS_IOC_FSINUMBERS: 2129 return xfs_ioc_fsbulkstat(filp, cmd, arg); 2130 2131 case XFS_IOC_BULKSTAT: 2132 return xfs_ioc_bulkstat(filp, cmd, arg); 2133 case XFS_IOC_INUMBERS: 2134 return xfs_ioc_inumbers(mp, cmd, arg); 2135 2136 case XFS_IOC_FSGEOMETRY_V1: 2137 return xfs_ioc_fsgeometry(mp, arg, 3); 2138 case XFS_IOC_FSGEOMETRY_V4: 2139 return xfs_ioc_fsgeometry(mp, arg, 4); 2140 case XFS_IOC_FSGEOMETRY: 2141 return xfs_ioc_fsgeometry(mp, arg, 5); 2142 2143 case XFS_IOC_AG_GEOMETRY: 2144 return xfs_ioc_ag_geometry(mp, arg); 2145 2146 case XFS_IOC_GETVERSION: 2147 return put_user(inode->i_generation, (int __user *)arg); 2148 2149 case XFS_IOC_FSGETXATTR: 2150 return xfs_ioc_fsgetxattr(ip, 0, arg); 2151 case XFS_IOC_FSGETXATTRA: 2152 return xfs_ioc_fsgetxattr(ip, 1, arg); 2153 case XFS_IOC_FSSETXATTR: 2154 return xfs_ioc_fssetxattr(filp, arg); 2155 case XFS_IOC_GETXFLAGS: 2156 return xfs_ioc_getxflags(ip, arg); 2157 case XFS_IOC_SETXFLAGS: 2158 return xfs_ioc_setxflags(ip, filp, arg); 2159 2160 case XFS_IOC_GETBMAP: 2161 case XFS_IOC_GETBMAPA: 2162 case XFS_IOC_GETBMAPX: 2163 return xfs_ioc_getbmap(filp, cmd, arg); 2164 2165 case FS_IOC_GETFSMAP: 2166 return xfs_ioc_getfsmap(ip, arg); 2167 2168 case XFS_IOC_SCRUB_METADATA: 2169 return xfs_ioc_scrub_metadata(ip, arg); 2170 2171 case XFS_IOC_FD_TO_HANDLE: 2172 case XFS_IOC_PATH_TO_HANDLE: 2173 case XFS_IOC_PATH_TO_FSHANDLE: { 2174 xfs_fsop_handlereq_t hreq; 2175 2176 if (copy_from_user(&hreq, arg, sizeof(hreq))) 2177 return -EFAULT; 2178 return xfs_find_handle(cmd, &hreq); 2179 } 2180 case XFS_IOC_OPEN_BY_HANDLE: { 2181 xfs_fsop_handlereq_t hreq; 2182 2183 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2184 return -EFAULT; 2185 return xfs_open_by_handle(filp, &hreq); 2186 } 2187 2188 case XFS_IOC_READLINK_BY_HANDLE: { 2189 xfs_fsop_handlereq_t hreq; 2190 2191 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2192 return -EFAULT; 2193 return xfs_readlink_by_handle(filp, &hreq); 2194 } 2195 case XFS_IOC_ATTRLIST_BY_HANDLE: 2196 return xfs_attrlist_by_handle(filp, arg); 2197 2198 case XFS_IOC_ATTRMULTI_BY_HANDLE: 2199 return xfs_attrmulti_by_handle(filp, arg); 2200 2201 case XFS_IOC_SWAPEXT: { 2202 struct xfs_swapext sxp; 2203 2204 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 2205 return -EFAULT; 2206 error = mnt_want_write_file(filp); 2207 if (error) 2208 return error; 2209 error = xfs_ioc_swapext(&sxp); 2210 mnt_drop_write_file(filp); 2211 return error; 2212 } 2213 2214 case XFS_IOC_FSCOUNTS: { 2215 xfs_fsop_counts_t out; 2216 2217 xfs_fs_counts(mp, &out); 2218 2219 if (copy_to_user(arg, &out, sizeof(out))) 2220 return -EFAULT; 2221 return 0; 2222 } 2223 2224 case XFS_IOC_SET_RESBLKS: { 2225 xfs_fsop_resblks_t inout; 2226 uint64_t in; 2227 2228 if (!capable(CAP_SYS_ADMIN)) 2229 return -EPERM; 2230 2231 if (mp->m_flags & XFS_MOUNT_RDONLY) 2232 return -EROFS; 2233 2234 if (copy_from_user(&inout, arg, sizeof(inout))) 2235 return -EFAULT; 2236 2237 error = mnt_want_write_file(filp); 2238 if (error) 2239 return error; 2240 2241 /* input parameter is passed in resblks field of structure */ 2242 in = inout.resblks; 2243 error = xfs_reserve_blocks(mp, &in, &inout); 2244 mnt_drop_write_file(filp); 2245 if (error) 2246 return error; 2247 2248 if (copy_to_user(arg, &inout, sizeof(inout))) 2249 return -EFAULT; 2250 return 0; 2251 } 2252 2253 case XFS_IOC_GET_RESBLKS: { 2254 xfs_fsop_resblks_t out; 2255 2256 if (!capable(CAP_SYS_ADMIN)) 2257 return -EPERM; 2258 2259 error = xfs_reserve_blocks(mp, NULL, &out); 2260 if (error) 2261 return error; 2262 2263 if (copy_to_user(arg, &out, sizeof(out))) 2264 return -EFAULT; 2265 2266 return 0; 2267 } 2268 2269 case XFS_IOC_FSGROWFSDATA: { 2270 xfs_growfs_data_t in; 2271 2272 if (copy_from_user(&in, arg, sizeof(in))) 2273 return -EFAULT; 2274 2275 error = mnt_want_write_file(filp); 2276 if (error) 2277 return error; 2278 error = xfs_growfs_data(mp, &in); 2279 mnt_drop_write_file(filp); 2280 return error; 2281 } 2282 2283 case XFS_IOC_FSGROWFSLOG: { 2284 xfs_growfs_log_t in; 2285 2286 if (copy_from_user(&in, arg, sizeof(in))) 2287 return -EFAULT; 2288 2289 error = mnt_want_write_file(filp); 2290 if (error) 2291 return error; 2292 error = xfs_growfs_log(mp, &in); 2293 mnt_drop_write_file(filp); 2294 return error; 2295 } 2296 2297 case XFS_IOC_FSGROWFSRT: { 2298 xfs_growfs_rt_t in; 2299 2300 if (copy_from_user(&in, arg, sizeof(in))) 2301 return -EFAULT; 2302 2303 error = mnt_want_write_file(filp); 2304 if (error) 2305 return error; 2306 error = xfs_growfs_rt(mp, &in); 2307 mnt_drop_write_file(filp); 2308 return error; 2309 } 2310 2311 case XFS_IOC_GOINGDOWN: { 2312 uint32_t in; 2313 2314 if (!capable(CAP_SYS_ADMIN)) 2315 return -EPERM; 2316 2317 if (get_user(in, (uint32_t __user *)arg)) 2318 return -EFAULT; 2319 2320 return xfs_fs_goingdown(mp, in); 2321 } 2322 2323 case XFS_IOC_ERROR_INJECTION: { 2324 xfs_error_injection_t in; 2325 2326 if (!capable(CAP_SYS_ADMIN)) 2327 return -EPERM; 2328 2329 if (copy_from_user(&in, arg, sizeof(in))) 2330 return -EFAULT; 2331 2332 return xfs_errortag_add(mp, in.errtag); 2333 } 2334 2335 case XFS_IOC_ERROR_CLEARALL: 2336 if (!capable(CAP_SYS_ADMIN)) 2337 return -EPERM; 2338 2339 return xfs_errortag_clearall(mp); 2340 2341 case XFS_IOC_FREE_EOFBLOCKS: { 2342 struct xfs_fs_eofblocks eofb; 2343 struct xfs_eofblocks keofb; 2344 2345 if (!capable(CAP_SYS_ADMIN)) 2346 return -EPERM; 2347 2348 if (mp->m_flags & XFS_MOUNT_RDONLY) 2349 return -EROFS; 2350 2351 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2352 return -EFAULT; 2353 2354 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 2355 if (error) 2356 return error; 2357 2358 sb_start_write(mp->m_super); 2359 error = xfs_icache_free_eofblocks(mp, &keofb); 2360 sb_end_write(mp->m_super); 2361 return error; 2362 } 2363 2364 default: 2365 return -ENOTTY; 2366 } 2367 } 2368