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_dentry(filp), &iattr); 697 if (error) 698 goto out_unlock; 699 700 error = xfs_update_prealloc_flags(ip, flags); 701 702 out_unlock: 703 xfs_iunlock(ip, iolock); 704 mnt_drop_write_file(filp); 705 return error; 706 } 707 708 /* Return 0 on success or positive error */ 709 int 710 xfs_fsbulkstat_one_fmt( 711 struct xfs_ibulk *breq, 712 const struct xfs_bulkstat *bstat) 713 { 714 struct xfs_bstat bs1; 715 716 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat); 717 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1))) 718 return -EFAULT; 719 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat)); 720 } 721 722 int 723 xfs_fsinumbers_fmt( 724 struct xfs_ibulk *breq, 725 const struct xfs_inumbers *igrp) 726 { 727 struct xfs_inogrp ig1; 728 729 xfs_inumbers_to_inogrp(&ig1, igrp); 730 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp))) 731 return -EFAULT; 732 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp)); 733 } 734 735 STATIC int 736 xfs_ioc_fsbulkstat( 737 xfs_mount_t *mp, 738 unsigned int cmd, 739 void __user *arg) 740 { 741 struct xfs_fsop_bulkreq bulkreq; 742 struct xfs_ibulk breq = { 743 .mp = mp, 744 .ocount = 0, 745 }; 746 xfs_ino_t lastino; 747 int error; 748 749 /* done = 1 if there are more stats to get and if bulkstat */ 750 /* should be called again (unused here, but used in dmapi) */ 751 752 if (!capable(CAP_SYS_ADMIN)) 753 return -EPERM; 754 755 if (XFS_FORCED_SHUTDOWN(mp)) 756 return -EIO; 757 758 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq))) 759 return -EFAULT; 760 761 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64))) 762 return -EFAULT; 763 764 if (bulkreq.icount <= 0) 765 return -EINVAL; 766 767 if (bulkreq.ubuffer == NULL) 768 return -EINVAL; 769 770 breq.ubuffer = bulkreq.ubuffer; 771 breq.icount = bulkreq.icount; 772 773 /* 774 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number 775 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect 776 * that *lastip contains either zero or the number of the last inode to 777 * be examined by the previous call and return results starting with 778 * the next inode after that. The new bulk request back end functions 779 * take the inode to start with, so we have to compute the startino 780 * parameter from lastino to maintain correct function. lastino == 0 781 * is a special case because it has traditionally meant "first inode 782 * in filesystem". 783 */ 784 if (cmd == XFS_IOC_FSINUMBERS) { 785 breq.startino = lastino ? lastino + 1 : 0; 786 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt); 787 lastino = breq.startino - 1; 788 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) { 789 breq.startino = lastino; 790 breq.icount = 1; 791 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt); 792 } else { /* XFS_IOC_FSBULKSTAT */ 793 breq.startino = lastino ? lastino + 1 : 0; 794 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt); 795 lastino = breq.startino - 1; 796 } 797 798 if (error) 799 return error; 800 801 if (bulkreq.lastip != NULL && 802 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t))) 803 return -EFAULT; 804 805 if (bulkreq.ocount != NULL && 806 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32))) 807 return -EFAULT; 808 809 return 0; 810 } 811 812 /* Return 0 on success or positive error */ 813 static int 814 xfs_bulkstat_fmt( 815 struct xfs_ibulk *breq, 816 const struct xfs_bulkstat *bstat) 817 { 818 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat))) 819 return -EFAULT; 820 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat)); 821 } 822 823 /* 824 * Check the incoming bulk request @hdr from userspace and initialize the 825 * internal @breq bulk request appropriately. Returns 0 if the bulk request 826 * should proceed; -ECANCELED if there's nothing to do; or the usual 827 * negative error code. 828 */ 829 static int 830 xfs_bulk_ireq_setup( 831 struct xfs_mount *mp, 832 struct xfs_bulk_ireq *hdr, 833 struct xfs_ibulk *breq, 834 void __user *ubuffer) 835 { 836 if (hdr->icount == 0 || 837 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) || 838 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) 839 return -EINVAL; 840 841 breq->startino = hdr->ino; 842 breq->ubuffer = ubuffer; 843 breq->icount = hdr->icount; 844 breq->ocount = 0; 845 breq->flags = 0; 846 847 /* 848 * The @ino parameter is a special value, so we must look it up here. 849 * We're not allowed to have IREQ_AGNO, and we only return one inode 850 * worth of data. 851 */ 852 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) { 853 if (hdr->flags & XFS_BULK_IREQ_AGNO) 854 return -EINVAL; 855 856 switch (hdr->ino) { 857 case XFS_BULK_IREQ_SPECIAL_ROOT: 858 hdr->ino = mp->m_sb.sb_rootino; 859 break; 860 default: 861 return -EINVAL; 862 } 863 breq->icount = 1; 864 } 865 866 /* 867 * The IREQ_AGNO flag means that we only want results from a given AG. 868 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is 869 * beyond the specified AG then we return no results. 870 */ 871 if (hdr->flags & XFS_BULK_IREQ_AGNO) { 872 if (hdr->agno >= mp->m_sb.sb_agcount) 873 return -EINVAL; 874 875 if (breq->startino == 0) 876 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0); 877 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno) 878 return -EINVAL; 879 880 breq->flags |= XFS_IBULK_SAME_AG; 881 882 /* Asking for an inode past the end of the AG? We're done! */ 883 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno) 884 return -ECANCELED; 885 } else if (hdr->agno) 886 return -EINVAL; 887 888 /* Asking for an inode past the end of the FS? We're done! */ 889 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount) 890 return -ECANCELED; 891 892 return 0; 893 } 894 895 /* 896 * Update the userspace bulk request @hdr to reflect the end state of the 897 * internal bulk request @breq. 898 */ 899 static void 900 xfs_bulk_ireq_teardown( 901 struct xfs_bulk_ireq *hdr, 902 struct xfs_ibulk *breq) 903 { 904 hdr->ino = breq->startino; 905 hdr->ocount = breq->ocount; 906 } 907 908 /* Handle the v5 bulkstat ioctl. */ 909 STATIC int 910 xfs_ioc_bulkstat( 911 struct xfs_mount *mp, 912 unsigned int cmd, 913 struct xfs_bulkstat_req __user *arg) 914 { 915 struct xfs_bulk_ireq hdr; 916 struct xfs_ibulk breq = { 917 .mp = mp, 918 }; 919 int error; 920 921 if (!capable(CAP_SYS_ADMIN)) 922 return -EPERM; 923 924 if (XFS_FORCED_SHUTDOWN(mp)) 925 return -EIO; 926 927 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 928 return -EFAULT; 929 930 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat); 931 if (error == -ECANCELED) 932 goto out_teardown; 933 if (error < 0) 934 return error; 935 936 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt); 937 if (error) 938 return error; 939 940 out_teardown: 941 xfs_bulk_ireq_teardown(&hdr, &breq); 942 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 943 return -EFAULT; 944 945 return 0; 946 } 947 948 STATIC int 949 xfs_inumbers_fmt( 950 struct xfs_ibulk *breq, 951 const struct xfs_inumbers *igrp) 952 { 953 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers))) 954 return -EFAULT; 955 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers)); 956 } 957 958 /* Handle the v5 inumbers ioctl. */ 959 STATIC int 960 xfs_ioc_inumbers( 961 struct xfs_mount *mp, 962 unsigned int cmd, 963 struct xfs_inumbers_req __user *arg) 964 { 965 struct xfs_bulk_ireq hdr; 966 struct xfs_ibulk breq = { 967 .mp = mp, 968 }; 969 int error; 970 971 if (!capable(CAP_SYS_ADMIN)) 972 return -EPERM; 973 974 if (XFS_FORCED_SHUTDOWN(mp)) 975 return -EIO; 976 977 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 978 return -EFAULT; 979 980 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers); 981 if (error == -ECANCELED) 982 goto out_teardown; 983 if (error < 0) 984 return error; 985 986 error = xfs_inumbers(&breq, xfs_inumbers_fmt); 987 if (error) 988 return error; 989 990 out_teardown: 991 xfs_bulk_ireq_teardown(&hdr, &breq); 992 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 993 return -EFAULT; 994 995 return 0; 996 } 997 998 STATIC int 999 xfs_ioc_fsgeometry( 1000 struct xfs_mount *mp, 1001 void __user *arg, 1002 int struct_version) 1003 { 1004 struct xfs_fsop_geom fsgeo; 1005 size_t len; 1006 1007 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version); 1008 1009 if (struct_version <= 3) 1010 len = sizeof(struct xfs_fsop_geom_v1); 1011 else if (struct_version == 4) 1012 len = sizeof(struct xfs_fsop_geom_v4); 1013 else { 1014 xfs_fsop_geom_health(mp, &fsgeo); 1015 len = sizeof(fsgeo); 1016 } 1017 1018 if (copy_to_user(arg, &fsgeo, len)) 1019 return -EFAULT; 1020 return 0; 1021 } 1022 1023 STATIC int 1024 xfs_ioc_ag_geometry( 1025 struct xfs_mount *mp, 1026 void __user *arg) 1027 { 1028 struct xfs_ag_geometry ageo; 1029 int error; 1030 1031 if (copy_from_user(&ageo, arg, sizeof(ageo))) 1032 return -EFAULT; 1033 if (ageo.ag_flags) 1034 return -EINVAL; 1035 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved))) 1036 return -EINVAL; 1037 1038 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo); 1039 if (error) 1040 return error; 1041 1042 if (copy_to_user(arg, &ageo, sizeof(ageo))) 1043 return -EFAULT; 1044 return 0; 1045 } 1046 1047 /* 1048 * Linux extended inode flags interface. 1049 */ 1050 1051 STATIC unsigned int 1052 xfs_merge_ioc_xflags( 1053 unsigned int flags, 1054 unsigned int start) 1055 { 1056 unsigned int xflags = start; 1057 1058 if (flags & FS_IMMUTABLE_FL) 1059 xflags |= FS_XFLAG_IMMUTABLE; 1060 else 1061 xflags &= ~FS_XFLAG_IMMUTABLE; 1062 if (flags & FS_APPEND_FL) 1063 xflags |= FS_XFLAG_APPEND; 1064 else 1065 xflags &= ~FS_XFLAG_APPEND; 1066 if (flags & FS_SYNC_FL) 1067 xflags |= FS_XFLAG_SYNC; 1068 else 1069 xflags &= ~FS_XFLAG_SYNC; 1070 if (flags & FS_NOATIME_FL) 1071 xflags |= FS_XFLAG_NOATIME; 1072 else 1073 xflags &= ~FS_XFLAG_NOATIME; 1074 if (flags & FS_NODUMP_FL) 1075 xflags |= FS_XFLAG_NODUMP; 1076 else 1077 xflags &= ~FS_XFLAG_NODUMP; 1078 if (flags & FS_DAX_FL) 1079 xflags |= FS_XFLAG_DAX; 1080 else 1081 xflags &= ~FS_XFLAG_DAX; 1082 1083 return xflags; 1084 } 1085 1086 STATIC unsigned int 1087 xfs_di2lxflags( 1088 uint16_t di_flags, 1089 uint64_t di_flags2) 1090 { 1091 unsigned int flags = 0; 1092 1093 if (di_flags & XFS_DIFLAG_IMMUTABLE) 1094 flags |= FS_IMMUTABLE_FL; 1095 if (di_flags & XFS_DIFLAG_APPEND) 1096 flags |= FS_APPEND_FL; 1097 if (di_flags & XFS_DIFLAG_SYNC) 1098 flags |= FS_SYNC_FL; 1099 if (di_flags & XFS_DIFLAG_NOATIME) 1100 flags |= FS_NOATIME_FL; 1101 if (di_flags & XFS_DIFLAG_NODUMP) 1102 flags |= FS_NODUMP_FL; 1103 if (di_flags2 & XFS_DIFLAG2_DAX) { 1104 flags |= FS_DAX_FL; 1105 } 1106 return flags; 1107 } 1108 1109 static void 1110 xfs_fill_fsxattr( 1111 struct xfs_inode *ip, 1112 bool attr, 1113 struct fsxattr *fa) 1114 { 1115 struct xfs_ifork *ifp = attr ? ip->i_afp : &ip->i_df; 1116 1117 simple_fill_fsxattr(fa, xfs_ip2xflags(ip)); 1118 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 1119 fa->fsx_cowextsize = ip->i_d.di_cowextsize << 1120 ip->i_mount->m_sb.sb_blocklog; 1121 fa->fsx_projid = ip->i_d.di_projid; 1122 if (ifp && (ifp->if_flags & XFS_IFEXTENTS)) 1123 fa->fsx_nextents = xfs_iext_count(ifp); 1124 else 1125 fa->fsx_nextents = xfs_ifork_nextents(ifp); 1126 } 1127 1128 STATIC int 1129 xfs_ioc_fsgetxattr( 1130 xfs_inode_t *ip, 1131 int attr, 1132 void __user *arg) 1133 { 1134 struct fsxattr fa; 1135 1136 xfs_ilock(ip, XFS_ILOCK_SHARED); 1137 xfs_fill_fsxattr(ip, attr, &fa); 1138 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1139 1140 if (copy_to_user(arg, &fa, sizeof(fa))) 1141 return -EFAULT; 1142 return 0; 1143 } 1144 1145 STATIC uint16_t 1146 xfs_flags2diflags( 1147 struct xfs_inode *ip, 1148 unsigned int xflags) 1149 { 1150 /* can't set PREALLOC this way, just preserve it */ 1151 uint16_t di_flags = 1152 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 1153 1154 if (xflags & FS_XFLAG_IMMUTABLE) 1155 di_flags |= XFS_DIFLAG_IMMUTABLE; 1156 if (xflags & FS_XFLAG_APPEND) 1157 di_flags |= XFS_DIFLAG_APPEND; 1158 if (xflags & FS_XFLAG_SYNC) 1159 di_flags |= XFS_DIFLAG_SYNC; 1160 if (xflags & FS_XFLAG_NOATIME) 1161 di_flags |= XFS_DIFLAG_NOATIME; 1162 if (xflags & FS_XFLAG_NODUMP) 1163 di_flags |= XFS_DIFLAG_NODUMP; 1164 if (xflags & FS_XFLAG_NODEFRAG) 1165 di_flags |= XFS_DIFLAG_NODEFRAG; 1166 if (xflags & FS_XFLAG_FILESTREAM) 1167 di_flags |= XFS_DIFLAG_FILESTREAM; 1168 if (S_ISDIR(VFS_I(ip)->i_mode)) { 1169 if (xflags & FS_XFLAG_RTINHERIT) 1170 di_flags |= XFS_DIFLAG_RTINHERIT; 1171 if (xflags & FS_XFLAG_NOSYMLINKS) 1172 di_flags |= XFS_DIFLAG_NOSYMLINKS; 1173 if (xflags & FS_XFLAG_EXTSZINHERIT) 1174 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 1175 if (xflags & FS_XFLAG_PROJINHERIT) 1176 di_flags |= XFS_DIFLAG_PROJINHERIT; 1177 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 1178 if (xflags & FS_XFLAG_REALTIME) 1179 di_flags |= XFS_DIFLAG_REALTIME; 1180 if (xflags & FS_XFLAG_EXTSIZE) 1181 di_flags |= XFS_DIFLAG_EXTSIZE; 1182 } 1183 1184 return di_flags; 1185 } 1186 1187 STATIC uint64_t 1188 xfs_flags2diflags2( 1189 struct xfs_inode *ip, 1190 unsigned int xflags) 1191 { 1192 uint64_t di_flags2 = 1193 (ip->i_d.di_flags2 & (XFS_DIFLAG2_REFLINK | 1194 XFS_DIFLAG2_BIGTIME)); 1195 1196 if (xflags & FS_XFLAG_DAX) 1197 di_flags2 |= XFS_DIFLAG2_DAX; 1198 if (xflags & FS_XFLAG_COWEXTSIZE) 1199 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 1200 1201 return di_flags2; 1202 } 1203 1204 static int 1205 xfs_ioctl_setattr_xflags( 1206 struct xfs_trans *tp, 1207 struct xfs_inode *ip, 1208 struct fsxattr *fa) 1209 { 1210 struct xfs_mount *mp = ip->i_mount; 1211 uint64_t di_flags2; 1212 1213 /* Can't change realtime flag if any extents are allocated. */ 1214 if ((ip->i_df.if_nextents || ip->i_delayed_blks) && 1215 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1216 return -EINVAL; 1217 1218 /* If realtime flag is set then must have realtime device */ 1219 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1220 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1221 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1222 return -EINVAL; 1223 } 1224 1225 /* Clear reflink if we are actually able to set the rt flag. */ 1226 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1227 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; 1228 1229 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1230 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1231 return -EINVAL; 1232 1233 /* diflags2 only valid for v3 inodes. */ 1234 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1235 if (di_flags2 && !xfs_sb_version_has_v3inode(&mp->m_sb)) 1236 return -EINVAL; 1237 1238 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags); 1239 ip->i_d.di_flags2 = di_flags2; 1240 1241 xfs_diflags_to_iflags(ip, false); 1242 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1243 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1244 XFS_STATS_INC(mp, xs_ig_attrchg); 1245 return 0; 1246 } 1247 1248 static void 1249 xfs_ioctl_setattr_prepare_dax( 1250 struct xfs_inode *ip, 1251 struct fsxattr *fa) 1252 { 1253 struct xfs_mount *mp = ip->i_mount; 1254 struct inode *inode = VFS_I(ip); 1255 1256 if (S_ISDIR(inode->i_mode)) 1257 return; 1258 1259 if ((mp->m_flags & XFS_MOUNT_DAX_ALWAYS) || 1260 (mp->m_flags & XFS_MOUNT_DAX_NEVER)) 1261 return; 1262 1263 if (((fa->fsx_xflags & FS_XFLAG_DAX) && 1264 !(ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) || 1265 (!(fa->fsx_xflags & FS_XFLAG_DAX) && 1266 (ip->i_d.di_flags2 & XFS_DIFLAG2_DAX))) 1267 d_mark_dontcache(inode); 1268 } 1269 1270 /* 1271 * Set up the transaction structure for the setattr operation, checking that we 1272 * have permission to do so. On success, return a clean transaction and the 1273 * inode locked exclusively ready for further operation specific checks. On 1274 * failure, return an error without modifying or locking the inode. 1275 */ 1276 static struct xfs_trans * 1277 xfs_ioctl_setattr_get_trans( 1278 struct xfs_inode *ip, 1279 struct xfs_dquot *pdqp) 1280 { 1281 struct xfs_mount *mp = ip->i_mount; 1282 struct xfs_trans *tp; 1283 int error = -EROFS; 1284 1285 if (mp->m_flags & XFS_MOUNT_RDONLY) 1286 goto out_error; 1287 error = -EIO; 1288 if (XFS_FORCED_SHUTDOWN(mp)) 1289 goto out_error; 1290 1291 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp, 1292 capable(CAP_FOWNER), &tp); 1293 if (error) 1294 goto out_error; 1295 1296 /* 1297 * CAP_FOWNER overrides the following restrictions: 1298 * 1299 * The user ID of the calling process must be equal to the file owner 1300 * ID, except in cases where the CAP_FSETID capability is applicable. 1301 */ 1302 if (!inode_owner_or_capable(VFS_I(ip))) { 1303 error = -EPERM; 1304 goto out_cancel; 1305 } 1306 1307 if (mp->m_flags & XFS_MOUNT_WSYNC) 1308 xfs_trans_set_sync(tp); 1309 1310 return tp; 1311 1312 out_cancel: 1313 xfs_trans_cancel(tp); 1314 out_error: 1315 return ERR_PTR(error); 1316 } 1317 1318 /* 1319 * extent size hint validation is somewhat cumbersome. Rules are: 1320 * 1321 * 1. extent size hint is only valid for directories and regular files 1322 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1323 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1324 * 4. can only be changed on regular files if no extents are allocated 1325 * 5. can be changed on directories at any time 1326 * 6. extsize hint of 0 turns off hints, clears inode flags. 1327 * 7. Extent size must be a multiple of the appropriate block size. 1328 * 8. for non-realtime files, the extent size hint must be limited 1329 * to half the AG size to avoid alignment extending the extent beyond the 1330 * limits of the AG. 1331 * 1332 * Please keep this function in sync with xfs_scrub_inode_extsize. 1333 */ 1334 static int 1335 xfs_ioctl_setattr_check_extsize( 1336 struct xfs_inode *ip, 1337 struct fsxattr *fa) 1338 { 1339 struct xfs_mount *mp = ip->i_mount; 1340 xfs_extlen_t size; 1341 xfs_fsblock_t extsize_fsb; 1342 1343 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents && 1344 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1345 return -EINVAL; 1346 1347 if (fa->fsx_extsize == 0) 1348 return 0; 1349 1350 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1351 if (extsize_fsb > MAXEXTLEN) 1352 return -EINVAL; 1353 1354 if (XFS_IS_REALTIME_INODE(ip) || 1355 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1356 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1357 } else { 1358 size = mp->m_sb.sb_blocksize; 1359 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1360 return -EINVAL; 1361 } 1362 1363 if (fa->fsx_extsize % size) 1364 return -EINVAL; 1365 1366 return 0; 1367 } 1368 1369 /* 1370 * CoW extent size hint validation rules are: 1371 * 1372 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1373 * The inode does not have to have any shared blocks, but it must be a v3. 1374 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1375 * for a directory, the hint is propagated to new files. 1376 * 3. Can be changed on files & directories at any time. 1377 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1378 * 5. Extent size must be a multiple of the appropriate block size. 1379 * 6. The extent size hint must be limited to half the AG size to avoid 1380 * alignment extending the extent beyond the limits of the AG. 1381 * 1382 * Please keep this function in sync with xfs_scrub_inode_cowextsize. 1383 */ 1384 static int 1385 xfs_ioctl_setattr_check_cowextsize( 1386 struct xfs_inode *ip, 1387 struct fsxattr *fa) 1388 { 1389 struct xfs_mount *mp = ip->i_mount; 1390 xfs_extlen_t size; 1391 xfs_fsblock_t cowextsize_fsb; 1392 1393 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1394 return 0; 1395 1396 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb)) 1397 return -EINVAL; 1398 1399 if (fa->fsx_cowextsize == 0) 1400 return 0; 1401 1402 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1403 if (cowextsize_fsb > MAXEXTLEN) 1404 return -EINVAL; 1405 1406 size = mp->m_sb.sb_blocksize; 1407 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1408 return -EINVAL; 1409 1410 if (fa->fsx_cowextsize % size) 1411 return -EINVAL; 1412 1413 return 0; 1414 } 1415 1416 static int 1417 xfs_ioctl_setattr_check_projid( 1418 struct xfs_inode *ip, 1419 struct fsxattr *fa) 1420 { 1421 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1422 if (fa->fsx_projid > (uint16_t)-1 && 1423 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1424 return -EINVAL; 1425 return 0; 1426 } 1427 1428 STATIC int 1429 xfs_ioctl_setattr( 1430 xfs_inode_t *ip, 1431 struct fsxattr *fa) 1432 { 1433 struct fsxattr old_fa; 1434 struct xfs_mount *mp = ip->i_mount; 1435 struct xfs_trans *tp; 1436 struct xfs_dquot *pdqp = NULL; 1437 struct xfs_dquot *olddquot = NULL; 1438 int error; 1439 1440 trace_xfs_ioctl_setattr(ip); 1441 1442 error = xfs_ioctl_setattr_check_projid(ip, fa); 1443 if (error) 1444 return error; 1445 1446 /* 1447 * If disk quotas is on, we make sure that the dquots do exist on disk, 1448 * before we start any other transactions. Trying to do this later 1449 * is messy. We don't care to take a readlock to look at the ids 1450 * in inode here, because we can't hold it across the trans_reserve. 1451 * If the IDs do change before we take the ilock, we're covered 1452 * because the i_*dquot fields will get updated anyway. 1453 */ 1454 if (XFS_IS_QUOTA_ON(mp)) { 1455 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid, 1456 VFS_I(ip)->i_gid, fa->fsx_projid, 1457 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp); 1458 if (error) 1459 return error; 1460 } 1461 1462 xfs_ioctl_setattr_prepare_dax(ip, fa); 1463 1464 tp = xfs_ioctl_setattr_get_trans(ip, pdqp); 1465 if (IS_ERR(tp)) { 1466 error = PTR_ERR(tp); 1467 goto error_free_dquots; 1468 } 1469 1470 xfs_fill_fsxattr(ip, false, &old_fa); 1471 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa); 1472 if (error) 1473 goto error_trans_cancel; 1474 1475 error = xfs_ioctl_setattr_check_extsize(ip, fa); 1476 if (error) 1477 goto error_trans_cancel; 1478 1479 error = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1480 if (error) 1481 goto error_trans_cancel; 1482 1483 error = xfs_ioctl_setattr_xflags(tp, ip, fa); 1484 if (error) 1485 goto error_trans_cancel; 1486 1487 /* 1488 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1489 * overrides the following restrictions: 1490 * 1491 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1492 * successful return from chown() 1493 */ 1494 1495 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1496 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1497 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1498 1499 /* Change the ownerships and register project quota modifications */ 1500 if (ip->i_d.di_projid != fa->fsx_projid) { 1501 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1502 olddquot = xfs_qm_vop_chown(tp, ip, 1503 &ip->i_pdquot, pdqp); 1504 } 1505 ip->i_d.di_projid = fa->fsx_projid; 1506 } 1507 1508 /* 1509 * Only set the extent size hint if we've already determined that the 1510 * extent size hint should be set on the inode. If no extent size flags 1511 * are set on the inode then unconditionally clear the extent size hint. 1512 */ 1513 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1514 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1515 else 1516 ip->i_d.di_extsize = 0; 1517 if (xfs_sb_version_has_v3inode(&mp->m_sb) && 1518 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) 1519 ip->i_d.di_cowextsize = fa->fsx_cowextsize >> 1520 mp->m_sb.sb_blocklog; 1521 else 1522 ip->i_d.di_cowextsize = 0; 1523 1524 error = xfs_trans_commit(tp); 1525 1526 /* 1527 * Release any dquot(s) the inode had kept before chown. 1528 */ 1529 xfs_qm_dqrele(olddquot); 1530 xfs_qm_dqrele(pdqp); 1531 1532 return error; 1533 1534 error_trans_cancel: 1535 xfs_trans_cancel(tp); 1536 error_free_dquots: 1537 xfs_qm_dqrele(pdqp); 1538 return error; 1539 } 1540 1541 STATIC int 1542 xfs_ioc_fssetxattr( 1543 xfs_inode_t *ip, 1544 struct file *filp, 1545 void __user *arg) 1546 { 1547 struct fsxattr fa; 1548 int error; 1549 1550 if (copy_from_user(&fa, arg, sizeof(fa))) 1551 return -EFAULT; 1552 1553 error = mnt_want_write_file(filp); 1554 if (error) 1555 return error; 1556 error = xfs_ioctl_setattr(ip, &fa); 1557 mnt_drop_write_file(filp); 1558 return error; 1559 } 1560 1561 STATIC int 1562 xfs_ioc_getxflags( 1563 xfs_inode_t *ip, 1564 void __user *arg) 1565 { 1566 unsigned int flags; 1567 1568 flags = xfs_di2lxflags(ip->i_d.di_flags, ip->i_d.di_flags2); 1569 if (copy_to_user(arg, &flags, sizeof(flags))) 1570 return -EFAULT; 1571 return 0; 1572 } 1573 1574 STATIC int 1575 xfs_ioc_setxflags( 1576 struct xfs_inode *ip, 1577 struct file *filp, 1578 void __user *arg) 1579 { 1580 struct xfs_trans *tp; 1581 struct fsxattr fa; 1582 struct fsxattr old_fa; 1583 unsigned int flags; 1584 int error; 1585 1586 if (copy_from_user(&flags, arg, sizeof(flags))) 1587 return -EFAULT; 1588 1589 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1590 FS_NOATIME_FL | FS_NODUMP_FL | \ 1591 FS_SYNC_FL | FS_DAX_FL)) 1592 return -EOPNOTSUPP; 1593 1594 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1595 1596 error = mnt_want_write_file(filp); 1597 if (error) 1598 return error; 1599 1600 xfs_ioctl_setattr_prepare_dax(ip, &fa); 1601 1602 tp = xfs_ioctl_setattr_get_trans(ip, NULL); 1603 if (IS_ERR(tp)) { 1604 error = PTR_ERR(tp); 1605 goto out_drop_write; 1606 } 1607 1608 xfs_fill_fsxattr(ip, false, &old_fa); 1609 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa); 1610 if (error) { 1611 xfs_trans_cancel(tp); 1612 goto out_drop_write; 1613 } 1614 1615 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1616 if (error) { 1617 xfs_trans_cancel(tp); 1618 goto out_drop_write; 1619 } 1620 1621 error = xfs_trans_commit(tp); 1622 out_drop_write: 1623 mnt_drop_write_file(filp); 1624 return error; 1625 } 1626 1627 static bool 1628 xfs_getbmap_format( 1629 struct kgetbmap *p, 1630 struct getbmapx __user *u, 1631 size_t recsize) 1632 { 1633 if (put_user(p->bmv_offset, &u->bmv_offset) || 1634 put_user(p->bmv_block, &u->bmv_block) || 1635 put_user(p->bmv_length, &u->bmv_length) || 1636 put_user(0, &u->bmv_count) || 1637 put_user(0, &u->bmv_entries)) 1638 return false; 1639 if (recsize < sizeof(struct getbmapx)) 1640 return true; 1641 if (put_user(0, &u->bmv_iflags) || 1642 put_user(p->bmv_oflags, &u->bmv_oflags) || 1643 put_user(0, &u->bmv_unused1) || 1644 put_user(0, &u->bmv_unused2)) 1645 return false; 1646 return true; 1647 } 1648 1649 STATIC int 1650 xfs_ioc_getbmap( 1651 struct file *file, 1652 unsigned int cmd, 1653 void __user *arg) 1654 { 1655 struct getbmapx bmx = { 0 }; 1656 struct kgetbmap *buf; 1657 size_t recsize; 1658 int error, i; 1659 1660 switch (cmd) { 1661 case XFS_IOC_GETBMAPA: 1662 bmx.bmv_iflags = BMV_IF_ATTRFORK; 1663 /*FALLTHRU*/ 1664 case XFS_IOC_GETBMAP: 1665 if (file->f_mode & FMODE_NOCMTIME) 1666 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1667 /* struct getbmap is a strict subset of struct getbmapx. */ 1668 recsize = sizeof(struct getbmap); 1669 break; 1670 case XFS_IOC_GETBMAPX: 1671 recsize = sizeof(struct getbmapx); 1672 break; 1673 default: 1674 return -EINVAL; 1675 } 1676 1677 if (copy_from_user(&bmx, arg, recsize)) 1678 return -EFAULT; 1679 1680 if (bmx.bmv_count < 2) 1681 return -EINVAL; 1682 if (bmx.bmv_count > ULONG_MAX / recsize) 1683 return -ENOMEM; 1684 1685 buf = kvzalloc(bmx.bmv_count * sizeof(*buf), GFP_KERNEL); 1686 if (!buf) 1687 return -ENOMEM; 1688 1689 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 1690 if (error) 1691 goto out_free_buf; 1692 1693 error = -EFAULT; 1694 if (copy_to_user(arg, &bmx, recsize)) 1695 goto out_free_buf; 1696 arg += recsize; 1697 1698 for (i = 0; i < bmx.bmv_entries; i++) { 1699 if (!xfs_getbmap_format(buf + i, arg, recsize)) 1700 goto out_free_buf; 1701 arg += recsize; 1702 } 1703 1704 error = 0; 1705 out_free_buf: 1706 kmem_free(buf); 1707 return error; 1708 } 1709 1710 STATIC int 1711 xfs_ioc_getfsmap( 1712 struct xfs_inode *ip, 1713 struct fsmap_head __user *arg) 1714 { 1715 struct xfs_fsmap_head xhead = {0}; 1716 struct fsmap_head head; 1717 struct fsmap *recs; 1718 unsigned int count; 1719 __u32 last_flags = 0; 1720 bool done = false; 1721 int error; 1722 1723 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1724 return -EFAULT; 1725 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1726 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1727 sizeof(head.fmh_keys[0].fmr_reserved)) || 1728 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1729 sizeof(head.fmh_keys[1].fmr_reserved))) 1730 return -EINVAL; 1731 1732 /* 1733 * Use an internal memory buffer so that we don't have to copy fsmap 1734 * data to userspace while holding locks. Start by trying to allocate 1735 * up to 128k for the buffer, but fall back to a single page if needed. 1736 */ 1737 count = min_t(unsigned int, head.fmh_count, 1738 131072 / sizeof(struct fsmap)); 1739 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL); 1740 if (!recs) { 1741 count = min_t(unsigned int, head.fmh_count, 1742 PAGE_SIZE / sizeof(struct fsmap)); 1743 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL); 1744 if (!recs) 1745 return -ENOMEM; 1746 } 1747 1748 xhead.fmh_iflags = head.fmh_iflags; 1749 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1750 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1751 1752 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1753 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1754 1755 head.fmh_entries = 0; 1756 do { 1757 struct fsmap __user *user_recs; 1758 struct fsmap *last_rec; 1759 1760 user_recs = &arg->fmh_recs[head.fmh_entries]; 1761 xhead.fmh_entries = 0; 1762 xhead.fmh_count = min_t(unsigned int, count, 1763 head.fmh_count - head.fmh_entries); 1764 1765 /* Run query, record how many entries we got. */ 1766 error = xfs_getfsmap(ip->i_mount, &xhead, recs); 1767 switch (error) { 1768 case 0: 1769 /* 1770 * There are no more records in the result set. Copy 1771 * whatever we got to userspace and break out. 1772 */ 1773 done = true; 1774 break; 1775 case -ECANCELED: 1776 /* 1777 * The internal memory buffer is full. Copy whatever 1778 * records we got to userspace and go again if we have 1779 * not yet filled the userspace buffer. 1780 */ 1781 error = 0; 1782 break; 1783 default: 1784 goto out_free; 1785 } 1786 head.fmh_entries += xhead.fmh_entries; 1787 head.fmh_oflags = xhead.fmh_oflags; 1788 1789 /* 1790 * If the caller wanted a record count or there aren't any 1791 * new records to return, we're done. 1792 */ 1793 if (head.fmh_count == 0 || xhead.fmh_entries == 0) 1794 break; 1795 1796 /* Copy all the records we got out to userspace. */ 1797 if (copy_to_user(user_recs, recs, 1798 xhead.fmh_entries * sizeof(struct fsmap))) { 1799 error = -EFAULT; 1800 goto out_free; 1801 } 1802 1803 /* Remember the last record flags we copied to userspace. */ 1804 last_rec = &recs[xhead.fmh_entries - 1]; 1805 last_flags = last_rec->fmr_flags; 1806 1807 /* Set up the low key for the next iteration. */ 1808 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec); 1809 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1810 } while (!done && head.fmh_entries < head.fmh_count); 1811 1812 /* 1813 * If there are no more records in the query result set and we're not 1814 * in counting mode, mark the last record returned with the LAST flag. 1815 */ 1816 if (done && head.fmh_count > 0 && head.fmh_entries > 0) { 1817 struct fsmap __user *user_rec; 1818 1819 last_flags |= FMR_OF_LAST; 1820 user_rec = &arg->fmh_recs[head.fmh_entries - 1]; 1821 1822 if (copy_to_user(&user_rec->fmr_flags, &last_flags, 1823 sizeof(last_flags))) { 1824 error = -EFAULT; 1825 goto out_free; 1826 } 1827 } 1828 1829 /* copy back header */ 1830 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) { 1831 error = -EFAULT; 1832 goto out_free; 1833 } 1834 1835 out_free: 1836 kmem_free(recs); 1837 return error; 1838 } 1839 1840 STATIC int 1841 xfs_ioc_scrub_metadata( 1842 struct xfs_inode *ip, 1843 void __user *arg) 1844 { 1845 struct xfs_scrub_metadata scrub; 1846 int error; 1847 1848 if (!capable(CAP_SYS_ADMIN)) 1849 return -EPERM; 1850 1851 if (copy_from_user(&scrub, arg, sizeof(scrub))) 1852 return -EFAULT; 1853 1854 error = xfs_scrub_metadata(ip, &scrub); 1855 if (error) 1856 return error; 1857 1858 if (copy_to_user(arg, &scrub, sizeof(scrub))) 1859 return -EFAULT; 1860 1861 return 0; 1862 } 1863 1864 int 1865 xfs_ioc_swapext( 1866 xfs_swapext_t *sxp) 1867 { 1868 xfs_inode_t *ip, *tip; 1869 struct fd f, tmp; 1870 int error = 0; 1871 1872 /* Pull information for the target fd */ 1873 f = fdget((int)sxp->sx_fdtarget); 1874 if (!f.file) { 1875 error = -EINVAL; 1876 goto out; 1877 } 1878 1879 if (!(f.file->f_mode & FMODE_WRITE) || 1880 !(f.file->f_mode & FMODE_READ) || 1881 (f.file->f_flags & O_APPEND)) { 1882 error = -EBADF; 1883 goto out_put_file; 1884 } 1885 1886 tmp = fdget((int)sxp->sx_fdtmp); 1887 if (!tmp.file) { 1888 error = -EINVAL; 1889 goto out_put_file; 1890 } 1891 1892 if (!(tmp.file->f_mode & FMODE_WRITE) || 1893 !(tmp.file->f_mode & FMODE_READ) || 1894 (tmp.file->f_flags & O_APPEND)) { 1895 error = -EBADF; 1896 goto out_put_tmp_file; 1897 } 1898 1899 if (IS_SWAPFILE(file_inode(f.file)) || 1900 IS_SWAPFILE(file_inode(tmp.file))) { 1901 error = -EINVAL; 1902 goto out_put_tmp_file; 1903 } 1904 1905 /* 1906 * We need to ensure that the fds passed in point to XFS inodes 1907 * before we cast and access them as XFS structures as we have no 1908 * control over what the user passes us here. 1909 */ 1910 if (f.file->f_op != &xfs_file_operations || 1911 tmp.file->f_op != &xfs_file_operations) { 1912 error = -EINVAL; 1913 goto out_put_tmp_file; 1914 } 1915 1916 ip = XFS_I(file_inode(f.file)); 1917 tip = XFS_I(file_inode(tmp.file)); 1918 1919 if (ip->i_mount != tip->i_mount) { 1920 error = -EINVAL; 1921 goto out_put_tmp_file; 1922 } 1923 1924 if (ip->i_ino == tip->i_ino) { 1925 error = -EINVAL; 1926 goto out_put_tmp_file; 1927 } 1928 1929 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1930 error = -EIO; 1931 goto out_put_tmp_file; 1932 } 1933 1934 error = xfs_swap_extents(ip, tip, sxp); 1935 1936 out_put_tmp_file: 1937 fdput(tmp); 1938 out_put_file: 1939 fdput(f); 1940 out: 1941 return error; 1942 } 1943 1944 static int 1945 xfs_ioc_getlabel( 1946 struct xfs_mount *mp, 1947 char __user *user_label) 1948 { 1949 struct xfs_sb *sbp = &mp->m_sb; 1950 char label[XFSLABEL_MAX + 1]; 1951 1952 /* Paranoia */ 1953 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 1954 1955 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 1956 memset(label, 0, sizeof(label)); 1957 spin_lock(&mp->m_sb_lock); 1958 strncpy(label, sbp->sb_fname, XFSLABEL_MAX); 1959 spin_unlock(&mp->m_sb_lock); 1960 1961 if (copy_to_user(user_label, label, sizeof(label))) 1962 return -EFAULT; 1963 return 0; 1964 } 1965 1966 static int 1967 xfs_ioc_setlabel( 1968 struct file *filp, 1969 struct xfs_mount *mp, 1970 char __user *newlabel) 1971 { 1972 struct xfs_sb *sbp = &mp->m_sb; 1973 char label[XFSLABEL_MAX + 1]; 1974 size_t len; 1975 int error; 1976 1977 if (!capable(CAP_SYS_ADMIN)) 1978 return -EPERM; 1979 /* 1980 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 1981 * smaller, at 12 bytes. We copy one more to be sure we find the 1982 * (required) NULL character to test the incoming label length. 1983 * NB: The on disk label doesn't need to be null terminated. 1984 */ 1985 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 1986 return -EFAULT; 1987 len = strnlen(label, XFSLABEL_MAX + 1); 1988 if (len > sizeof(sbp->sb_fname)) 1989 return -EINVAL; 1990 1991 error = mnt_want_write_file(filp); 1992 if (error) 1993 return error; 1994 1995 spin_lock(&mp->m_sb_lock); 1996 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 1997 memcpy(sbp->sb_fname, label, len); 1998 spin_unlock(&mp->m_sb_lock); 1999 2000 /* 2001 * Now we do several things to satisfy userspace. 2002 * In addition to normal logging of the primary superblock, we also 2003 * immediately write these changes to sector zero for the primary, then 2004 * update all backup supers (as xfs_db does for a label change), then 2005 * invalidate the block device page cache. This is so that any prior 2006 * buffered reads from userspace (i.e. from blkid) are invalidated, 2007 * and userspace will see the newly-written label. 2008 */ 2009 error = xfs_sync_sb_buf(mp); 2010 if (error) 2011 goto out; 2012 /* 2013 * growfs also updates backup supers so lock against that. 2014 */ 2015 mutex_lock(&mp->m_growlock); 2016 error = xfs_update_secondary_sbs(mp); 2017 mutex_unlock(&mp->m_growlock); 2018 2019 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 2020 2021 out: 2022 mnt_drop_write_file(filp); 2023 return error; 2024 } 2025 2026 static inline int 2027 xfs_fs_eofblocks_from_user( 2028 struct xfs_fs_eofblocks *src, 2029 struct xfs_eofblocks *dst) 2030 { 2031 if (src->eof_version != XFS_EOFBLOCKS_VERSION) 2032 return -EINVAL; 2033 2034 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID) 2035 return -EINVAL; 2036 2037 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) || 2038 memchr_inv(src->pad64, 0, sizeof(src->pad64))) 2039 return -EINVAL; 2040 2041 dst->eof_flags = src->eof_flags; 2042 dst->eof_prid = src->eof_prid; 2043 dst->eof_min_file_size = src->eof_min_file_size; 2044 2045 dst->eof_uid = INVALID_UID; 2046 if (src->eof_flags & XFS_EOF_FLAGS_UID) { 2047 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid); 2048 if (!uid_valid(dst->eof_uid)) 2049 return -EINVAL; 2050 } 2051 2052 dst->eof_gid = INVALID_GID; 2053 if (src->eof_flags & XFS_EOF_FLAGS_GID) { 2054 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid); 2055 if (!gid_valid(dst->eof_gid)) 2056 return -EINVAL; 2057 } 2058 return 0; 2059 } 2060 2061 /* 2062 * Note: some of the ioctl's return positive numbers as a 2063 * byte count indicating success, such as readlink_by_handle. 2064 * So we don't "sign flip" like most other routines. This means 2065 * true errors need to be returned as a negative value. 2066 */ 2067 long 2068 xfs_file_ioctl( 2069 struct file *filp, 2070 unsigned int cmd, 2071 unsigned long p) 2072 { 2073 struct inode *inode = file_inode(filp); 2074 struct xfs_inode *ip = XFS_I(inode); 2075 struct xfs_mount *mp = ip->i_mount; 2076 void __user *arg = (void __user *)p; 2077 int error; 2078 2079 trace_xfs_file_ioctl(ip); 2080 2081 switch (cmd) { 2082 case FITRIM: 2083 return xfs_ioc_trim(mp, arg); 2084 case FS_IOC_GETFSLABEL: 2085 return xfs_ioc_getlabel(mp, arg); 2086 case FS_IOC_SETFSLABEL: 2087 return xfs_ioc_setlabel(filp, mp, arg); 2088 case XFS_IOC_ALLOCSP: 2089 case XFS_IOC_FREESP: 2090 case XFS_IOC_ALLOCSP64: 2091 case XFS_IOC_FREESP64: { 2092 xfs_flock64_t bf; 2093 2094 if (copy_from_user(&bf, arg, sizeof(bf))) 2095 return -EFAULT; 2096 return xfs_ioc_space(filp, &bf); 2097 } 2098 case XFS_IOC_DIOINFO: { 2099 struct xfs_buftarg *target = xfs_inode_buftarg(ip); 2100 struct dioattr da; 2101 2102 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 2103 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 2104 2105 if (copy_to_user(arg, &da, sizeof(da))) 2106 return -EFAULT; 2107 return 0; 2108 } 2109 2110 case XFS_IOC_FSBULKSTAT_SINGLE: 2111 case XFS_IOC_FSBULKSTAT: 2112 case XFS_IOC_FSINUMBERS: 2113 return xfs_ioc_fsbulkstat(mp, cmd, arg); 2114 2115 case XFS_IOC_BULKSTAT: 2116 return xfs_ioc_bulkstat(mp, cmd, arg); 2117 case XFS_IOC_INUMBERS: 2118 return xfs_ioc_inumbers(mp, cmd, arg); 2119 2120 case XFS_IOC_FSGEOMETRY_V1: 2121 return xfs_ioc_fsgeometry(mp, arg, 3); 2122 case XFS_IOC_FSGEOMETRY_V4: 2123 return xfs_ioc_fsgeometry(mp, arg, 4); 2124 case XFS_IOC_FSGEOMETRY: 2125 return xfs_ioc_fsgeometry(mp, arg, 5); 2126 2127 case XFS_IOC_AG_GEOMETRY: 2128 return xfs_ioc_ag_geometry(mp, arg); 2129 2130 case XFS_IOC_GETVERSION: 2131 return put_user(inode->i_generation, (int __user *)arg); 2132 2133 case XFS_IOC_FSGETXATTR: 2134 return xfs_ioc_fsgetxattr(ip, 0, arg); 2135 case XFS_IOC_FSGETXATTRA: 2136 return xfs_ioc_fsgetxattr(ip, 1, arg); 2137 case XFS_IOC_FSSETXATTR: 2138 return xfs_ioc_fssetxattr(ip, filp, arg); 2139 case XFS_IOC_GETXFLAGS: 2140 return xfs_ioc_getxflags(ip, arg); 2141 case XFS_IOC_SETXFLAGS: 2142 return xfs_ioc_setxflags(ip, filp, arg); 2143 2144 case XFS_IOC_GETBMAP: 2145 case XFS_IOC_GETBMAPA: 2146 case XFS_IOC_GETBMAPX: 2147 return xfs_ioc_getbmap(filp, cmd, arg); 2148 2149 case FS_IOC_GETFSMAP: 2150 return xfs_ioc_getfsmap(ip, arg); 2151 2152 case XFS_IOC_SCRUB_METADATA: 2153 return xfs_ioc_scrub_metadata(ip, arg); 2154 2155 case XFS_IOC_FD_TO_HANDLE: 2156 case XFS_IOC_PATH_TO_HANDLE: 2157 case XFS_IOC_PATH_TO_FSHANDLE: { 2158 xfs_fsop_handlereq_t hreq; 2159 2160 if (copy_from_user(&hreq, arg, sizeof(hreq))) 2161 return -EFAULT; 2162 return xfs_find_handle(cmd, &hreq); 2163 } 2164 case XFS_IOC_OPEN_BY_HANDLE: { 2165 xfs_fsop_handlereq_t hreq; 2166 2167 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2168 return -EFAULT; 2169 return xfs_open_by_handle(filp, &hreq); 2170 } 2171 2172 case XFS_IOC_READLINK_BY_HANDLE: { 2173 xfs_fsop_handlereq_t hreq; 2174 2175 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2176 return -EFAULT; 2177 return xfs_readlink_by_handle(filp, &hreq); 2178 } 2179 case XFS_IOC_ATTRLIST_BY_HANDLE: 2180 return xfs_attrlist_by_handle(filp, arg); 2181 2182 case XFS_IOC_ATTRMULTI_BY_HANDLE: 2183 return xfs_attrmulti_by_handle(filp, arg); 2184 2185 case XFS_IOC_SWAPEXT: { 2186 struct xfs_swapext sxp; 2187 2188 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 2189 return -EFAULT; 2190 error = mnt_want_write_file(filp); 2191 if (error) 2192 return error; 2193 error = xfs_ioc_swapext(&sxp); 2194 mnt_drop_write_file(filp); 2195 return error; 2196 } 2197 2198 case XFS_IOC_FSCOUNTS: { 2199 xfs_fsop_counts_t out; 2200 2201 xfs_fs_counts(mp, &out); 2202 2203 if (copy_to_user(arg, &out, sizeof(out))) 2204 return -EFAULT; 2205 return 0; 2206 } 2207 2208 case XFS_IOC_SET_RESBLKS: { 2209 xfs_fsop_resblks_t inout; 2210 uint64_t in; 2211 2212 if (!capable(CAP_SYS_ADMIN)) 2213 return -EPERM; 2214 2215 if (mp->m_flags & XFS_MOUNT_RDONLY) 2216 return -EROFS; 2217 2218 if (copy_from_user(&inout, arg, sizeof(inout))) 2219 return -EFAULT; 2220 2221 error = mnt_want_write_file(filp); 2222 if (error) 2223 return error; 2224 2225 /* input parameter is passed in resblks field of structure */ 2226 in = inout.resblks; 2227 error = xfs_reserve_blocks(mp, &in, &inout); 2228 mnt_drop_write_file(filp); 2229 if (error) 2230 return error; 2231 2232 if (copy_to_user(arg, &inout, sizeof(inout))) 2233 return -EFAULT; 2234 return 0; 2235 } 2236 2237 case XFS_IOC_GET_RESBLKS: { 2238 xfs_fsop_resblks_t out; 2239 2240 if (!capable(CAP_SYS_ADMIN)) 2241 return -EPERM; 2242 2243 error = xfs_reserve_blocks(mp, NULL, &out); 2244 if (error) 2245 return error; 2246 2247 if (copy_to_user(arg, &out, sizeof(out))) 2248 return -EFAULT; 2249 2250 return 0; 2251 } 2252 2253 case XFS_IOC_FSGROWFSDATA: { 2254 struct xfs_growfs_data in; 2255 2256 if (copy_from_user(&in, arg, sizeof(in))) 2257 return -EFAULT; 2258 2259 error = mnt_want_write_file(filp); 2260 if (error) 2261 return error; 2262 error = xfs_growfs_data(mp, &in); 2263 mnt_drop_write_file(filp); 2264 return error; 2265 } 2266 2267 case XFS_IOC_FSGROWFSLOG: { 2268 struct xfs_growfs_log in; 2269 2270 if (copy_from_user(&in, arg, sizeof(in))) 2271 return -EFAULT; 2272 2273 error = mnt_want_write_file(filp); 2274 if (error) 2275 return error; 2276 error = xfs_growfs_log(mp, &in); 2277 mnt_drop_write_file(filp); 2278 return error; 2279 } 2280 2281 case XFS_IOC_FSGROWFSRT: { 2282 xfs_growfs_rt_t in; 2283 2284 if (copy_from_user(&in, arg, sizeof(in))) 2285 return -EFAULT; 2286 2287 error = mnt_want_write_file(filp); 2288 if (error) 2289 return error; 2290 error = xfs_growfs_rt(mp, &in); 2291 mnt_drop_write_file(filp); 2292 return error; 2293 } 2294 2295 case XFS_IOC_GOINGDOWN: { 2296 uint32_t in; 2297 2298 if (!capable(CAP_SYS_ADMIN)) 2299 return -EPERM; 2300 2301 if (get_user(in, (uint32_t __user *)arg)) 2302 return -EFAULT; 2303 2304 return xfs_fs_goingdown(mp, in); 2305 } 2306 2307 case XFS_IOC_ERROR_INJECTION: { 2308 xfs_error_injection_t in; 2309 2310 if (!capable(CAP_SYS_ADMIN)) 2311 return -EPERM; 2312 2313 if (copy_from_user(&in, arg, sizeof(in))) 2314 return -EFAULT; 2315 2316 return xfs_errortag_add(mp, in.errtag); 2317 } 2318 2319 case XFS_IOC_ERROR_CLEARALL: 2320 if (!capable(CAP_SYS_ADMIN)) 2321 return -EPERM; 2322 2323 return xfs_errortag_clearall(mp); 2324 2325 case XFS_IOC_FREE_EOFBLOCKS: { 2326 struct xfs_fs_eofblocks eofb; 2327 struct xfs_eofblocks keofb; 2328 2329 if (!capable(CAP_SYS_ADMIN)) 2330 return -EPERM; 2331 2332 if (mp->m_flags & XFS_MOUNT_RDONLY) 2333 return -EROFS; 2334 2335 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2336 return -EFAULT; 2337 2338 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 2339 if (error) 2340 return error; 2341 2342 trace_xfs_ioc_free_eofblocks(mp, &keofb, _RET_IP_); 2343 2344 sb_start_write(mp->m_super); 2345 error = xfs_blockgc_free_space(mp, &keofb); 2346 sb_end_write(mp->m_super); 2347 return error; 2348 } 2349 2350 default: 2351 return -ENOTTY; 2352 } 2353 } 2354