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 #include <linux/fileattr.h> 44 45 /* 46 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 47 * a file or fs handle. 48 * 49 * XFS_IOC_PATH_TO_FSHANDLE 50 * returns fs handle for a mount point or path within that mount point 51 * XFS_IOC_FD_TO_HANDLE 52 * returns full handle for a FD opened in user space 53 * XFS_IOC_PATH_TO_HANDLE 54 * returns full handle for a path 55 */ 56 int 57 xfs_find_handle( 58 unsigned int cmd, 59 xfs_fsop_handlereq_t *hreq) 60 { 61 int hsize; 62 xfs_handle_t handle; 63 struct inode *inode; 64 struct fd f = {NULL}; 65 struct path path; 66 int error; 67 struct xfs_inode *ip; 68 69 if (cmd == XFS_IOC_FD_TO_HANDLE) { 70 f = fdget(hreq->fd); 71 if (!f.file) 72 return -EBADF; 73 inode = file_inode(f.file); 74 } else { 75 error = user_path_at(AT_FDCWD, hreq->path, 0, &path); 76 if (error) 77 return error; 78 inode = d_inode(path.dentry); 79 } 80 ip = XFS_I(inode); 81 82 /* 83 * We can only generate handles for inodes residing on a XFS filesystem, 84 * and only for regular files, directories or symbolic links. 85 */ 86 error = -EINVAL; 87 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 88 goto out_put; 89 90 error = -EBADF; 91 if (!S_ISREG(inode->i_mode) && 92 !S_ISDIR(inode->i_mode) && 93 !S_ISLNK(inode->i_mode)) 94 goto out_put; 95 96 97 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 98 99 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 100 /* 101 * This handle only contains an fsid, zero the rest. 102 */ 103 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 104 hsize = sizeof(xfs_fsid_t); 105 } else { 106 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 107 sizeof(handle.ha_fid.fid_len); 108 handle.ha_fid.fid_pad = 0; 109 handle.ha_fid.fid_gen = inode->i_generation; 110 handle.ha_fid.fid_ino = ip->i_ino; 111 hsize = sizeof(xfs_handle_t); 112 } 113 114 error = -EFAULT; 115 if (copy_to_user(hreq->ohandle, &handle, hsize) || 116 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 117 goto out_put; 118 119 error = 0; 120 121 out_put: 122 if (cmd == XFS_IOC_FD_TO_HANDLE) 123 fdput(f); 124 else 125 path_put(&path); 126 return error; 127 } 128 129 /* 130 * No need to do permission checks on the various pathname components 131 * as the handle operations are privileged. 132 */ 133 STATIC int 134 xfs_handle_acceptable( 135 void *context, 136 struct dentry *dentry) 137 { 138 return 1; 139 } 140 141 /* 142 * Convert userspace handle data into a dentry. 143 */ 144 struct dentry * 145 xfs_handle_to_dentry( 146 struct file *parfilp, 147 void __user *uhandle, 148 u32 hlen) 149 { 150 xfs_handle_t handle; 151 struct xfs_fid64 fid; 152 153 /* 154 * Only allow handle opens under a directory. 155 */ 156 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 157 return ERR_PTR(-ENOTDIR); 158 159 if (hlen != sizeof(xfs_handle_t)) 160 return ERR_PTR(-EINVAL); 161 if (copy_from_user(&handle, uhandle, hlen)) 162 return ERR_PTR(-EFAULT); 163 if (handle.ha_fid.fid_len != 164 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 165 return ERR_PTR(-EINVAL); 166 167 memset(&fid, 0, sizeof(struct fid)); 168 fid.ino = handle.ha_fid.fid_ino; 169 fid.gen = handle.ha_fid.fid_gen; 170 171 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 172 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 173 xfs_handle_acceptable, NULL); 174 } 175 176 STATIC struct dentry * 177 xfs_handlereq_to_dentry( 178 struct file *parfilp, 179 xfs_fsop_handlereq_t *hreq) 180 { 181 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 182 } 183 184 int 185 xfs_open_by_handle( 186 struct file *parfilp, 187 xfs_fsop_handlereq_t *hreq) 188 { 189 const struct cred *cred = current_cred(); 190 int error; 191 int fd; 192 int permflag; 193 struct file *filp; 194 struct inode *inode; 195 struct dentry *dentry; 196 fmode_t fmode; 197 struct path path; 198 199 if (!capable(CAP_SYS_ADMIN)) 200 return -EPERM; 201 202 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 203 if (IS_ERR(dentry)) 204 return PTR_ERR(dentry); 205 inode = d_inode(dentry); 206 207 /* Restrict xfs_open_by_handle to directories & regular files. */ 208 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 209 error = -EPERM; 210 goto out_dput; 211 } 212 213 #if BITS_PER_LONG != 32 214 hreq->oflags |= O_LARGEFILE; 215 #endif 216 217 permflag = hreq->oflags; 218 fmode = OPEN_FMODE(permflag); 219 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 220 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 221 error = -EPERM; 222 goto out_dput; 223 } 224 225 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 226 error = -EPERM; 227 goto out_dput; 228 } 229 230 /* Can't write directories. */ 231 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 232 error = -EISDIR; 233 goto out_dput; 234 } 235 236 fd = get_unused_fd_flags(0); 237 if (fd < 0) { 238 error = fd; 239 goto out_dput; 240 } 241 242 path.mnt = parfilp->f_path.mnt; 243 path.dentry = dentry; 244 filp = dentry_open(&path, hreq->oflags, cred); 245 dput(dentry); 246 if (IS_ERR(filp)) { 247 put_unused_fd(fd); 248 return PTR_ERR(filp); 249 } 250 251 if (S_ISREG(inode->i_mode)) { 252 filp->f_flags |= O_NOATIME; 253 filp->f_mode |= FMODE_NOCMTIME; 254 } 255 256 fd_install(fd, filp); 257 return fd; 258 259 out_dput: 260 dput(dentry); 261 return error; 262 } 263 264 int 265 xfs_readlink_by_handle( 266 struct file *parfilp, 267 xfs_fsop_handlereq_t *hreq) 268 { 269 struct dentry *dentry; 270 __u32 olen; 271 int error; 272 273 if (!capable(CAP_SYS_ADMIN)) 274 return -EPERM; 275 276 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 277 if (IS_ERR(dentry)) 278 return PTR_ERR(dentry); 279 280 /* Restrict this handle operation to symlinks only. */ 281 if (!d_is_symlink(dentry)) { 282 error = -EINVAL; 283 goto out_dput; 284 } 285 286 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 287 error = -EFAULT; 288 goto out_dput; 289 } 290 291 error = vfs_readlink(dentry, hreq->ohandle, olen); 292 293 out_dput: 294 dput(dentry); 295 return error; 296 } 297 298 /* 299 * Format an attribute and copy it out to the user's buffer. 300 * Take care to check values and protect against them changing later, 301 * we may be reading them directly out of a user buffer. 302 */ 303 static void 304 xfs_ioc_attr_put_listent( 305 struct xfs_attr_list_context *context, 306 int flags, 307 unsigned char *name, 308 int namelen, 309 int valuelen) 310 { 311 struct xfs_attrlist *alist = context->buffer; 312 struct xfs_attrlist_ent *aep; 313 int arraytop; 314 315 ASSERT(!context->seen_enough); 316 ASSERT(context->count >= 0); 317 ASSERT(context->count < (ATTR_MAX_VALUELEN/8)); 318 ASSERT(context->firstu >= sizeof(*alist)); 319 ASSERT(context->firstu <= context->bufsize); 320 321 /* 322 * Only list entries in the right namespace. 323 */ 324 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK)) 325 return; 326 327 arraytop = sizeof(*alist) + 328 context->count * sizeof(alist->al_offset[0]); 329 330 /* decrement by the actual bytes used by the attr */ 331 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) + 332 namelen + 1, sizeof(uint32_t)); 333 if (context->firstu < arraytop) { 334 trace_xfs_attr_list_full(context); 335 alist->al_more = 1; 336 context->seen_enough = 1; 337 return; 338 } 339 340 aep = context->buffer + context->firstu; 341 aep->a_valuelen = valuelen; 342 memcpy(aep->a_name, name, namelen); 343 aep->a_name[namelen] = 0; 344 alist->al_offset[context->count++] = context->firstu; 345 alist->al_count = context->count; 346 trace_xfs_attr_list_add(context); 347 } 348 349 static unsigned int 350 xfs_attr_filter( 351 u32 ioc_flags) 352 { 353 if (ioc_flags & XFS_IOC_ATTR_ROOT) 354 return XFS_ATTR_ROOT; 355 if (ioc_flags & XFS_IOC_ATTR_SECURE) 356 return XFS_ATTR_SECURE; 357 return 0; 358 } 359 360 static unsigned int 361 xfs_attr_flags( 362 u32 ioc_flags) 363 { 364 if (ioc_flags & XFS_IOC_ATTR_CREATE) 365 return XATTR_CREATE; 366 if (ioc_flags & XFS_IOC_ATTR_REPLACE) 367 return XATTR_REPLACE; 368 return 0; 369 } 370 371 int 372 xfs_ioc_attr_list( 373 struct xfs_inode *dp, 374 void __user *ubuf, 375 int bufsize, 376 int flags, 377 struct xfs_attrlist_cursor __user *ucursor) 378 { 379 struct xfs_attr_list_context context = { }; 380 struct xfs_attrlist *alist; 381 void *buffer; 382 int error; 383 384 if (bufsize < sizeof(struct xfs_attrlist) || 385 bufsize > XFS_XATTR_LIST_MAX) 386 return -EINVAL; 387 388 /* 389 * Reject flags, only allow namespaces. 390 */ 391 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE)) 392 return -EINVAL; 393 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE)) 394 return -EINVAL; 395 396 /* 397 * Validate the cursor. 398 */ 399 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor))) 400 return -EFAULT; 401 if (context.cursor.pad1 || context.cursor.pad2) 402 return -EINVAL; 403 if (!context.cursor.initted && 404 (context.cursor.hashval || context.cursor.blkno || 405 context.cursor.offset)) 406 return -EINVAL; 407 408 buffer = kvzalloc(bufsize, GFP_KERNEL); 409 if (!buffer) 410 return -ENOMEM; 411 412 /* 413 * Initialize the output buffer. 414 */ 415 context.dp = dp; 416 context.resynch = 1; 417 context.attr_filter = xfs_attr_filter(flags); 418 context.buffer = buffer; 419 context.bufsize = round_down(bufsize, sizeof(uint32_t)); 420 context.firstu = context.bufsize; 421 context.put_listent = xfs_ioc_attr_put_listent; 422 423 alist = context.buffer; 424 alist->al_count = 0; 425 alist->al_more = 0; 426 alist->al_offset[0] = context.bufsize; 427 428 error = xfs_attr_list(&context); 429 if (error) 430 goto out_free; 431 432 if (copy_to_user(ubuf, buffer, bufsize) || 433 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor))) 434 error = -EFAULT; 435 out_free: 436 kmem_free(buffer); 437 return error; 438 } 439 440 STATIC int 441 xfs_attrlist_by_handle( 442 struct file *parfilp, 443 struct xfs_fsop_attrlist_handlereq __user *p) 444 { 445 struct xfs_fsop_attrlist_handlereq al_hreq; 446 struct dentry *dentry; 447 int error = -ENOMEM; 448 449 if (!capable(CAP_SYS_ADMIN)) 450 return -EPERM; 451 if (copy_from_user(&al_hreq, p, sizeof(al_hreq))) 452 return -EFAULT; 453 454 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 455 if (IS_ERR(dentry)) 456 return PTR_ERR(dentry); 457 458 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer, 459 al_hreq.buflen, al_hreq.flags, &p->pos); 460 dput(dentry); 461 return error; 462 } 463 464 static int 465 xfs_attrmulti_attr_get( 466 struct inode *inode, 467 unsigned char *name, 468 unsigned char __user *ubuf, 469 uint32_t *len, 470 uint32_t flags) 471 { 472 struct xfs_da_args args = { 473 .dp = XFS_I(inode), 474 .attr_filter = xfs_attr_filter(flags), 475 .attr_flags = xfs_attr_flags(flags), 476 .name = name, 477 .namelen = strlen(name), 478 .valuelen = *len, 479 }; 480 int error; 481 482 if (*len > XFS_XATTR_SIZE_MAX) 483 return -EINVAL; 484 485 error = xfs_attr_get(&args); 486 if (error) 487 goto out_kfree; 488 489 *len = args.valuelen; 490 if (copy_to_user(ubuf, args.value, args.valuelen)) 491 error = -EFAULT; 492 493 out_kfree: 494 kmem_free(args.value); 495 return error; 496 } 497 498 static int 499 xfs_attrmulti_attr_set( 500 struct inode *inode, 501 unsigned char *name, 502 const unsigned char __user *ubuf, 503 uint32_t len, 504 uint32_t flags) 505 { 506 struct xfs_da_args args = { 507 .dp = XFS_I(inode), 508 .attr_filter = xfs_attr_filter(flags), 509 .attr_flags = xfs_attr_flags(flags), 510 .name = name, 511 .namelen = strlen(name), 512 }; 513 int error; 514 515 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 516 return -EPERM; 517 518 if (ubuf) { 519 if (len > XFS_XATTR_SIZE_MAX) 520 return -EINVAL; 521 args.value = memdup_user(ubuf, len); 522 if (IS_ERR(args.value)) 523 return PTR_ERR(args.value); 524 args.valuelen = len; 525 } 526 527 error = xfs_attr_set(&args); 528 if (!error && (flags & XFS_IOC_ATTR_ROOT)) 529 xfs_forget_acl(inode, name); 530 kfree(args.value); 531 return error; 532 } 533 534 int 535 xfs_ioc_attrmulti_one( 536 struct file *parfilp, 537 struct inode *inode, 538 uint32_t opcode, 539 void __user *uname, 540 void __user *value, 541 uint32_t *len, 542 uint32_t flags) 543 { 544 unsigned char *name; 545 int error; 546 547 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE)) 548 return -EINVAL; 549 550 name = strndup_user(uname, MAXNAMELEN); 551 if (IS_ERR(name)) 552 return PTR_ERR(name); 553 554 switch (opcode) { 555 case ATTR_OP_GET: 556 error = xfs_attrmulti_attr_get(inode, name, value, len, flags); 557 break; 558 case ATTR_OP_REMOVE: 559 value = NULL; 560 *len = 0; 561 fallthrough; 562 case ATTR_OP_SET: 563 error = mnt_want_write_file(parfilp); 564 if (error) 565 break; 566 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags); 567 mnt_drop_write_file(parfilp); 568 break; 569 default: 570 error = -EINVAL; 571 break; 572 } 573 574 kfree(name); 575 return error; 576 } 577 578 STATIC int 579 xfs_attrmulti_by_handle( 580 struct file *parfilp, 581 void __user *arg) 582 { 583 int error; 584 xfs_attr_multiop_t *ops; 585 xfs_fsop_attrmulti_handlereq_t am_hreq; 586 struct dentry *dentry; 587 unsigned int i, size; 588 589 if (!capable(CAP_SYS_ADMIN)) 590 return -EPERM; 591 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 592 return -EFAULT; 593 594 /* overflow check */ 595 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 596 return -E2BIG; 597 598 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 599 if (IS_ERR(dentry)) 600 return PTR_ERR(dentry); 601 602 error = -E2BIG; 603 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 604 if (!size || size > 16 * PAGE_SIZE) 605 goto out_dput; 606 607 ops = memdup_user(am_hreq.ops, size); 608 if (IS_ERR(ops)) { 609 error = PTR_ERR(ops); 610 goto out_dput; 611 } 612 613 error = 0; 614 for (i = 0; i < am_hreq.opcount; i++) { 615 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp, 616 d_inode(dentry), ops[i].am_opcode, 617 ops[i].am_attrname, ops[i].am_attrvalue, 618 &ops[i].am_length, ops[i].am_flags); 619 } 620 621 if (copy_to_user(am_hreq.ops, ops, size)) 622 error = -EFAULT; 623 624 kfree(ops); 625 out_dput: 626 dput(dentry); 627 return error; 628 } 629 630 int 631 xfs_ioc_space( 632 struct file *filp, 633 xfs_flock64_t *bf) 634 { 635 struct inode *inode = file_inode(filp); 636 struct xfs_inode *ip = XFS_I(inode); 637 struct iattr iattr; 638 enum xfs_prealloc_flags flags = XFS_PREALLOC_CLEAR; 639 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; 640 int error; 641 642 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 643 return -EPERM; 644 645 if (!(filp->f_mode & FMODE_WRITE)) 646 return -EBADF; 647 648 if (!S_ISREG(inode->i_mode)) 649 return -EINVAL; 650 651 if (xfs_is_always_cow_inode(ip)) 652 return -EOPNOTSUPP; 653 654 if (filp->f_flags & O_DSYNC) 655 flags |= XFS_PREALLOC_SYNC; 656 if (filp->f_mode & FMODE_NOCMTIME) 657 flags |= XFS_PREALLOC_INVISIBLE; 658 659 error = mnt_want_write_file(filp); 660 if (error) 661 return error; 662 663 xfs_ilock(ip, iolock); 664 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); 665 if (error) 666 goto out_unlock; 667 inode_dio_wait(inode); 668 669 switch (bf->l_whence) { 670 case 0: /*SEEK_SET*/ 671 break; 672 case 1: /*SEEK_CUR*/ 673 bf->l_start += filp->f_pos; 674 break; 675 case 2: /*SEEK_END*/ 676 bf->l_start += XFS_ISIZE(ip); 677 break; 678 default: 679 error = -EINVAL; 680 goto out_unlock; 681 } 682 683 if (bf->l_start < 0 || bf->l_start > inode->i_sb->s_maxbytes) { 684 error = -EINVAL; 685 goto out_unlock; 686 } 687 688 if (bf->l_start > XFS_ISIZE(ip)) { 689 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 690 bf->l_start - XFS_ISIZE(ip), 0); 691 if (error) 692 goto out_unlock; 693 } 694 695 iattr.ia_valid = ATTR_SIZE; 696 iattr.ia_size = bf->l_start; 697 error = xfs_vn_setattr_size(file_mnt_user_ns(filp), file_dentry(filp), 698 &iattr); 699 if (error) 700 goto out_unlock; 701 702 error = xfs_update_prealloc_flags(ip, flags); 703 704 out_unlock: 705 xfs_iunlock(ip, iolock); 706 mnt_drop_write_file(filp); 707 return error; 708 } 709 710 /* Return 0 on success or positive error */ 711 int 712 xfs_fsbulkstat_one_fmt( 713 struct xfs_ibulk *breq, 714 const struct xfs_bulkstat *bstat) 715 { 716 struct xfs_bstat bs1; 717 718 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat); 719 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1))) 720 return -EFAULT; 721 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat)); 722 } 723 724 int 725 xfs_fsinumbers_fmt( 726 struct xfs_ibulk *breq, 727 const struct xfs_inumbers *igrp) 728 { 729 struct xfs_inogrp ig1; 730 731 xfs_inumbers_to_inogrp(&ig1, igrp); 732 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp))) 733 return -EFAULT; 734 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp)); 735 } 736 737 STATIC int 738 xfs_ioc_fsbulkstat( 739 struct file *file, 740 unsigned int cmd, 741 void __user *arg) 742 { 743 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount; 744 struct xfs_fsop_bulkreq bulkreq; 745 struct xfs_ibulk breq = { 746 .mp = mp, 747 .mnt_userns = file_mnt_user_ns(file), 748 .ocount = 0, 749 }; 750 xfs_ino_t lastino; 751 int error; 752 753 /* done = 1 if there are more stats to get and if bulkstat */ 754 /* should be called again (unused here, but used in dmapi) */ 755 756 if (!capable(CAP_SYS_ADMIN)) 757 return -EPERM; 758 759 if (xfs_is_shutdown(mp)) 760 return -EIO; 761 762 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq))) 763 return -EFAULT; 764 765 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64))) 766 return -EFAULT; 767 768 if (bulkreq.icount <= 0) 769 return -EINVAL; 770 771 if (bulkreq.ubuffer == NULL) 772 return -EINVAL; 773 774 breq.ubuffer = bulkreq.ubuffer; 775 breq.icount = bulkreq.icount; 776 777 /* 778 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number 779 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect 780 * that *lastip contains either zero or the number of the last inode to 781 * be examined by the previous call and return results starting with 782 * the next inode after that. The new bulk request back end functions 783 * take the inode to start with, so we have to compute the startino 784 * parameter from lastino to maintain correct function. lastino == 0 785 * is a special case because it has traditionally meant "first inode 786 * in filesystem". 787 */ 788 if (cmd == XFS_IOC_FSINUMBERS) { 789 breq.startino = lastino ? lastino + 1 : 0; 790 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt); 791 lastino = breq.startino - 1; 792 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) { 793 breq.startino = lastino; 794 breq.icount = 1; 795 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt); 796 } else { /* XFS_IOC_FSBULKSTAT */ 797 breq.startino = lastino ? lastino + 1 : 0; 798 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt); 799 lastino = breq.startino - 1; 800 } 801 802 if (error) 803 return error; 804 805 if (bulkreq.lastip != NULL && 806 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t))) 807 return -EFAULT; 808 809 if (bulkreq.ocount != NULL && 810 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32))) 811 return -EFAULT; 812 813 return 0; 814 } 815 816 /* Return 0 on success or positive error */ 817 static int 818 xfs_bulkstat_fmt( 819 struct xfs_ibulk *breq, 820 const struct xfs_bulkstat *bstat) 821 { 822 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat))) 823 return -EFAULT; 824 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat)); 825 } 826 827 /* 828 * Check the incoming bulk request @hdr from userspace and initialize the 829 * internal @breq bulk request appropriately. Returns 0 if the bulk request 830 * should proceed; -ECANCELED if there's nothing to do; or the usual 831 * negative error code. 832 */ 833 static int 834 xfs_bulk_ireq_setup( 835 struct xfs_mount *mp, 836 struct xfs_bulk_ireq *hdr, 837 struct xfs_ibulk *breq, 838 void __user *ubuffer) 839 { 840 if (hdr->icount == 0 || 841 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) || 842 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) 843 return -EINVAL; 844 845 breq->startino = hdr->ino; 846 breq->ubuffer = ubuffer; 847 breq->icount = hdr->icount; 848 breq->ocount = 0; 849 breq->flags = 0; 850 851 /* 852 * The @ino parameter is a special value, so we must look it up here. 853 * We're not allowed to have IREQ_AGNO, and we only return one inode 854 * worth of data. 855 */ 856 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) { 857 if (hdr->flags & XFS_BULK_IREQ_AGNO) 858 return -EINVAL; 859 860 switch (hdr->ino) { 861 case XFS_BULK_IREQ_SPECIAL_ROOT: 862 hdr->ino = mp->m_sb.sb_rootino; 863 break; 864 default: 865 return -EINVAL; 866 } 867 breq->icount = 1; 868 } 869 870 /* 871 * The IREQ_AGNO flag means that we only want results from a given AG. 872 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is 873 * beyond the specified AG then we return no results. 874 */ 875 if (hdr->flags & XFS_BULK_IREQ_AGNO) { 876 if (hdr->agno >= mp->m_sb.sb_agcount) 877 return -EINVAL; 878 879 if (breq->startino == 0) 880 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0); 881 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno) 882 return -EINVAL; 883 884 breq->flags |= XFS_IBULK_SAME_AG; 885 886 /* Asking for an inode past the end of the AG? We're done! */ 887 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno) 888 return -ECANCELED; 889 } else if (hdr->agno) 890 return -EINVAL; 891 892 /* Asking for an inode past the end of the FS? We're done! */ 893 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount) 894 return -ECANCELED; 895 896 return 0; 897 } 898 899 /* 900 * Update the userspace bulk request @hdr to reflect the end state of the 901 * internal bulk request @breq. 902 */ 903 static void 904 xfs_bulk_ireq_teardown( 905 struct xfs_bulk_ireq *hdr, 906 struct xfs_ibulk *breq) 907 { 908 hdr->ino = breq->startino; 909 hdr->ocount = breq->ocount; 910 } 911 912 /* Handle the v5 bulkstat ioctl. */ 913 STATIC int 914 xfs_ioc_bulkstat( 915 struct file *file, 916 unsigned int cmd, 917 struct xfs_bulkstat_req __user *arg) 918 { 919 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount; 920 struct xfs_bulk_ireq hdr; 921 struct xfs_ibulk breq = { 922 .mp = mp, 923 .mnt_userns = file_mnt_user_ns(file), 924 }; 925 int error; 926 927 if (!capable(CAP_SYS_ADMIN)) 928 return -EPERM; 929 930 if (xfs_is_shutdown(mp)) 931 return -EIO; 932 933 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 934 return -EFAULT; 935 936 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat); 937 if (error == -ECANCELED) 938 goto out_teardown; 939 if (error < 0) 940 return error; 941 942 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt); 943 if (error) 944 return error; 945 946 out_teardown: 947 xfs_bulk_ireq_teardown(&hdr, &breq); 948 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 949 return -EFAULT; 950 951 return 0; 952 } 953 954 STATIC int 955 xfs_inumbers_fmt( 956 struct xfs_ibulk *breq, 957 const struct xfs_inumbers *igrp) 958 { 959 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers))) 960 return -EFAULT; 961 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers)); 962 } 963 964 /* Handle the v5 inumbers ioctl. */ 965 STATIC int 966 xfs_ioc_inumbers( 967 struct xfs_mount *mp, 968 unsigned int cmd, 969 struct xfs_inumbers_req __user *arg) 970 { 971 struct xfs_bulk_ireq hdr; 972 struct xfs_ibulk breq = { 973 .mp = mp, 974 }; 975 int error; 976 977 if (!capable(CAP_SYS_ADMIN)) 978 return -EPERM; 979 980 if (xfs_is_shutdown(mp)) 981 return -EIO; 982 983 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 984 return -EFAULT; 985 986 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers); 987 if (error == -ECANCELED) 988 goto out_teardown; 989 if (error < 0) 990 return error; 991 992 error = xfs_inumbers(&breq, xfs_inumbers_fmt); 993 if (error) 994 return error; 995 996 out_teardown: 997 xfs_bulk_ireq_teardown(&hdr, &breq); 998 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 999 return -EFAULT; 1000 1001 return 0; 1002 } 1003 1004 STATIC int 1005 xfs_ioc_fsgeometry( 1006 struct xfs_mount *mp, 1007 void __user *arg, 1008 int struct_version) 1009 { 1010 struct xfs_fsop_geom fsgeo; 1011 size_t len; 1012 1013 xfs_fs_geometry(mp, &fsgeo, struct_version); 1014 1015 if (struct_version <= 3) 1016 len = sizeof(struct xfs_fsop_geom_v1); 1017 else if (struct_version == 4) 1018 len = sizeof(struct xfs_fsop_geom_v4); 1019 else { 1020 xfs_fsop_geom_health(mp, &fsgeo); 1021 len = sizeof(fsgeo); 1022 } 1023 1024 if (copy_to_user(arg, &fsgeo, len)) 1025 return -EFAULT; 1026 return 0; 1027 } 1028 1029 STATIC int 1030 xfs_ioc_ag_geometry( 1031 struct xfs_mount *mp, 1032 void __user *arg) 1033 { 1034 struct xfs_ag_geometry ageo; 1035 int error; 1036 1037 if (copy_from_user(&ageo, arg, sizeof(ageo))) 1038 return -EFAULT; 1039 if (ageo.ag_flags) 1040 return -EINVAL; 1041 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved))) 1042 return -EINVAL; 1043 1044 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo); 1045 if (error) 1046 return error; 1047 1048 if (copy_to_user(arg, &ageo, sizeof(ageo))) 1049 return -EFAULT; 1050 return 0; 1051 } 1052 1053 /* 1054 * Linux extended inode flags interface. 1055 */ 1056 1057 static void 1058 xfs_fill_fsxattr( 1059 struct xfs_inode *ip, 1060 int whichfork, 1061 struct fileattr *fa) 1062 { 1063 struct xfs_mount *mp = ip->i_mount; 1064 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 1065 1066 fileattr_fill_xflags(fa, xfs_ip2xflags(ip)); 1067 1068 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) { 1069 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize); 1070 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) { 1071 /* 1072 * Don't let a misaligned extent size hint on a directory 1073 * escape to userspace if it won't pass the setattr checks 1074 * later. 1075 */ 1076 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) && 1077 ip->i_extsize % mp->m_sb.sb_rextsize > 0) { 1078 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | 1079 FS_XFLAG_EXTSZINHERIT); 1080 fa->fsx_extsize = 0; 1081 } else { 1082 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize); 1083 } 1084 } 1085 1086 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) 1087 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize); 1088 fa->fsx_projid = ip->i_projid; 1089 if (ifp && !xfs_need_iread_extents(ifp)) 1090 fa->fsx_nextents = xfs_iext_count(ifp); 1091 else 1092 fa->fsx_nextents = xfs_ifork_nextents(ifp); 1093 } 1094 1095 STATIC int 1096 xfs_ioc_fsgetxattra( 1097 xfs_inode_t *ip, 1098 void __user *arg) 1099 { 1100 struct fileattr fa; 1101 1102 xfs_ilock(ip, XFS_ILOCK_SHARED); 1103 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa); 1104 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1105 1106 return copy_fsxattr_to_user(&fa, arg); 1107 } 1108 1109 int 1110 xfs_fileattr_get( 1111 struct dentry *dentry, 1112 struct fileattr *fa) 1113 { 1114 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 1115 1116 if (d_is_special(dentry)) 1117 return -ENOTTY; 1118 1119 xfs_ilock(ip, XFS_ILOCK_SHARED); 1120 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa); 1121 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1122 1123 return 0; 1124 } 1125 1126 STATIC uint16_t 1127 xfs_flags2diflags( 1128 struct xfs_inode *ip, 1129 unsigned int xflags) 1130 { 1131 /* can't set PREALLOC this way, just preserve it */ 1132 uint16_t di_flags = 1133 (ip->i_diflags & XFS_DIFLAG_PREALLOC); 1134 1135 if (xflags & FS_XFLAG_IMMUTABLE) 1136 di_flags |= XFS_DIFLAG_IMMUTABLE; 1137 if (xflags & FS_XFLAG_APPEND) 1138 di_flags |= XFS_DIFLAG_APPEND; 1139 if (xflags & FS_XFLAG_SYNC) 1140 di_flags |= XFS_DIFLAG_SYNC; 1141 if (xflags & FS_XFLAG_NOATIME) 1142 di_flags |= XFS_DIFLAG_NOATIME; 1143 if (xflags & FS_XFLAG_NODUMP) 1144 di_flags |= XFS_DIFLAG_NODUMP; 1145 if (xflags & FS_XFLAG_NODEFRAG) 1146 di_flags |= XFS_DIFLAG_NODEFRAG; 1147 if (xflags & FS_XFLAG_FILESTREAM) 1148 di_flags |= XFS_DIFLAG_FILESTREAM; 1149 if (S_ISDIR(VFS_I(ip)->i_mode)) { 1150 if (xflags & FS_XFLAG_RTINHERIT) 1151 di_flags |= XFS_DIFLAG_RTINHERIT; 1152 if (xflags & FS_XFLAG_NOSYMLINKS) 1153 di_flags |= XFS_DIFLAG_NOSYMLINKS; 1154 if (xflags & FS_XFLAG_EXTSZINHERIT) 1155 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 1156 if (xflags & FS_XFLAG_PROJINHERIT) 1157 di_flags |= XFS_DIFLAG_PROJINHERIT; 1158 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 1159 if (xflags & FS_XFLAG_REALTIME) 1160 di_flags |= XFS_DIFLAG_REALTIME; 1161 if (xflags & FS_XFLAG_EXTSIZE) 1162 di_flags |= XFS_DIFLAG_EXTSIZE; 1163 } 1164 1165 return di_flags; 1166 } 1167 1168 STATIC uint64_t 1169 xfs_flags2diflags2( 1170 struct xfs_inode *ip, 1171 unsigned int xflags) 1172 { 1173 uint64_t di_flags2 = 1174 (ip->i_diflags2 & (XFS_DIFLAG2_REFLINK | 1175 XFS_DIFLAG2_BIGTIME)); 1176 1177 if (xflags & FS_XFLAG_DAX) 1178 di_flags2 |= XFS_DIFLAG2_DAX; 1179 if (xflags & FS_XFLAG_COWEXTSIZE) 1180 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 1181 1182 return di_flags2; 1183 } 1184 1185 static int 1186 xfs_ioctl_setattr_xflags( 1187 struct xfs_trans *tp, 1188 struct xfs_inode *ip, 1189 struct fileattr *fa) 1190 { 1191 struct xfs_mount *mp = ip->i_mount; 1192 uint64_t i_flags2; 1193 1194 /* Can't change realtime flag if any extents are allocated. */ 1195 if ((ip->i_df.if_nextents || ip->i_delayed_blks) && 1196 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1197 return -EINVAL; 1198 1199 /* If realtime flag is set then must have realtime device */ 1200 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1201 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1202 (ip->i_extsize % mp->m_sb.sb_rextsize)) 1203 return -EINVAL; 1204 } 1205 1206 /* Clear reflink if we are actually able to set the rt flag. */ 1207 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1208 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK; 1209 1210 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1211 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1212 return -EINVAL; 1213 1214 /* diflags2 only valid for v3 inodes. */ 1215 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1216 if (i_flags2 && !xfs_has_v3inodes(mp)) 1217 return -EINVAL; 1218 1219 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 1220 ip->i_diflags2 = i_flags2; 1221 1222 xfs_diflags_to_iflags(ip, false); 1223 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1224 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1225 XFS_STATS_INC(mp, xs_ig_attrchg); 1226 return 0; 1227 } 1228 1229 static void 1230 xfs_ioctl_setattr_prepare_dax( 1231 struct xfs_inode *ip, 1232 struct fileattr *fa) 1233 { 1234 struct xfs_mount *mp = ip->i_mount; 1235 struct inode *inode = VFS_I(ip); 1236 1237 if (S_ISDIR(inode->i_mode)) 1238 return; 1239 1240 if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp)) 1241 return; 1242 1243 if (((fa->fsx_xflags & FS_XFLAG_DAX) && 1244 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) || 1245 (!(fa->fsx_xflags & FS_XFLAG_DAX) && 1246 (ip->i_diflags2 & XFS_DIFLAG2_DAX))) 1247 d_mark_dontcache(inode); 1248 } 1249 1250 /* 1251 * Set up the transaction structure for the setattr operation, checking that we 1252 * have permission to do so. On success, return a clean transaction and the 1253 * inode locked exclusively ready for further operation specific checks. On 1254 * failure, return an error without modifying or locking the inode. 1255 */ 1256 static struct xfs_trans * 1257 xfs_ioctl_setattr_get_trans( 1258 struct xfs_inode *ip, 1259 struct xfs_dquot *pdqp) 1260 { 1261 struct xfs_mount *mp = ip->i_mount; 1262 struct xfs_trans *tp; 1263 int error = -EROFS; 1264 1265 if (xfs_is_readonly(mp)) 1266 goto out_error; 1267 error = -EIO; 1268 if (xfs_is_shutdown(mp)) 1269 goto out_error; 1270 1271 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp, 1272 capable(CAP_FOWNER), &tp); 1273 if (error) 1274 goto out_error; 1275 1276 if (xfs_has_wsync(mp)) 1277 xfs_trans_set_sync(tp); 1278 1279 return tp; 1280 1281 out_error: 1282 return ERR_PTR(error); 1283 } 1284 1285 /* 1286 * Validate a proposed extent size hint. For regular files, the hint can only 1287 * be changed if no extents are allocated. 1288 */ 1289 static int 1290 xfs_ioctl_setattr_check_extsize( 1291 struct xfs_inode *ip, 1292 struct fileattr *fa) 1293 { 1294 struct xfs_mount *mp = ip->i_mount; 1295 xfs_failaddr_t failaddr; 1296 uint16_t new_diflags; 1297 1298 if (!fa->fsx_valid) 1299 return 0; 1300 1301 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents && 1302 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize) 1303 return -EINVAL; 1304 1305 if (fa->fsx_extsize & mp->m_blockmask) 1306 return -EINVAL; 1307 1308 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 1309 1310 /* 1311 * Inode verifiers do not check that the extent size hint is an integer 1312 * multiple of the rt extent size on a directory with both rtinherit 1313 * and extszinherit flags set. Don't let sysadmins misconfigure 1314 * directories. 1315 */ 1316 if ((new_diflags & XFS_DIFLAG_RTINHERIT) && 1317 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) { 1318 unsigned int rtextsize_bytes; 1319 1320 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize); 1321 if (fa->fsx_extsize % rtextsize_bytes) 1322 return -EINVAL; 1323 } 1324 1325 failaddr = xfs_inode_validate_extsize(ip->i_mount, 1326 XFS_B_TO_FSB(mp, fa->fsx_extsize), 1327 VFS_I(ip)->i_mode, new_diflags); 1328 return failaddr != NULL ? -EINVAL : 0; 1329 } 1330 1331 static int 1332 xfs_ioctl_setattr_check_cowextsize( 1333 struct xfs_inode *ip, 1334 struct fileattr *fa) 1335 { 1336 struct xfs_mount *mp = ip->i_mount; 1337 xfs_failaddr_t failaddr; 1338 uint64_t new_diflags2; 1339 uint16_t new_diflags; 1340 1341 if (!fa->fsx_valid) 1342 return 0; 1343 1344 if (fa->fsx_cowextsize & mp->m_blockmask) 1345 return -EINVAL; 1346 1347 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 1348 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1349 1350 failaddr = xfs_inode_validate_cowextsize(ip->i_mount, 1351 XFS_B_TO_FSB(mp, fa->fsx_cowextsize), 1352 VFS_I(ip)->i_mode, new_diflags, new_diflags2); 1353 return failaddr != NULL ? -EINVAL : 0; 1354 } 1355 1356 static int 1357 xfs_ioctl_setattr_check_projid( 1358 struct xfs_inode *ip, 1359 struct fileattr *fa) 1360 { 1361 if (!fa->fsx_valid) 1362 return 0; 1363 1364 /* Disallow 32bit project ids if 32bit IDs are not enabled. */ 1365 if (fa->fsx_projid > (uint16_t)-1 && 1366 !xfs_has_projid32(ip->i_mount)) 1367 return -EINVAL; 1368 return 0; 1369 } 1370 1371 int 1372 xfs_fileattr_set( 1373 struct user_namespace *mnt_userns, 1374 struct dentry *dentry, 1375 struct fileattr *fa) 1376 { 1377 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 1378 struct xfs_mount *mp = ip->i_mount; 1379 struct xfs_trans *tp; 1380 struct xfs_dquot *pdqp = NULL; 1381 struct xfs_dquot *olddquot = NULL; 1382 int error; 1383 1384 trace_xfs_ioctl_setattr(ip); 1385 1386 if (d_is_special(dentry)) 1387 return -ENOTTY; 1388 1389 if (!fa->fsx_valid) { 1390 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | 1391 FS_NOATIME_FL | FS_NODUMP_FL | 1392 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL)) 1393 return -EOPNOTSUPP; 1394 } 1395 1396 error = xfs_ioctl_setattr_check_projid(ip, fa); 1397 if (error) 1398 return error; 1399 1400 /* 1401 * If disk quotas is on, we make sure that the dquots do exist on disk, 1402 * before we start any other transactions. Trying to do this later 1403 * is messy. We don't care to take a readlock to look at the ids 1404 * in inode here, because we can't hold it across the trans_reserve. 1405 * If the IDs do change before we take the ilock, we're covered 1406 * because the i_*dquot fields will get updated anyway. 1407 */ 1408 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) { 1409 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid, 1410 VFS_I(ip)->i_gid, fa->fsx_projid, 1411 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp); 1412 if (error) 1413 return error; 1414 } 1415 1416 xfs_ioctl_setattr_prepare_dax(ip, fa); 1417 1418 tp = xfs_ioctl_setattr_get_trans(ip, pdqp); 1419 if (IS_ERR(tp)) { 1420 error = PTR_ERR(tp); 1421 goto error_free_dquots; 1422 } 1423 1424 error = xfs_ioctl_setattr_check_extsize(ip, fa); 1425 if (error) 1426 goto error_trans_cancel; 1427 1428 error = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1429 if (error) 1430 goto error_trans_cancel; 1431 1432 error = xfs_ioctl_setattr_xflags(tp, ip, fa); 1433 if (error) 1434 goto error_trans_cancel; 1435 1436 if (!fa->fsx_valid) 1437 goto skip_xattr; 1438 /* 1439 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1440 * overrides the following restrictions: 1441 * 1442 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1443 * successful return from chown() 1444 */ 1445 1446 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1447 !capable_wrt_inode_uidgid(mnt_userns, VFS_I(ip), CAP_FSETID)) 1448 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1449 1450 /* Change the ownerships and register project quota modifications */ 1451 if (ip->i_projid != fa->fsx_projid) { 1452 if (XFS_IS_PQUOTA_ON(mp)) { 1453 olddquot = xfs_qm_vop_chown(tp, ip, 1454 &ip->i_pdquot, pdqp); 1455 } 1456 ip->i_projid = fa->fsx_projid; 1457 } 1458 1459 /* 1460 * Only set the extent size hint if we've already determined that the 1461 * extent size hint should be set on the inode. If no extent size flags 1462 * are set on the inode then unconditionally clear the extent size hint. 1463 */ 1464 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1465 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1466 else 1467 ip->i_extsize = 0; 1468 1469 if (xfs_has_v3inodes(mp)) { 1470 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) 1471 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1472 else 1473 ip->i_cowextsize = 0; 1474 } 1475 1476 skip_xattr: 1477 error = xfs_trans_commit(tp); 1478 1479 /* 1480 * Release any dquot(s) the inode had kept before chown. 1481 */ 1482 xfs_qm_dqrele(olddquot); 1483 xfs_qm_dqrele(pdqp); 1484 1485 return error; 1486 1487 error_trans_cancel: 1488 xfs_trans_cancel(tp); 1489 error_free_dquots: 1490 xfs_qm_dqrele(pdqp); 1491 return error; 1492 } 1493 1494 static bool 1495 xfs_getbmap_format( 1496 struct kgetbmap *p, 1497 struct getbmapx __user *u, 1498 size_t recsize) 1499 { 1500 if (put_user(p->bmv_offset, &u->bmv_offset) || 1501 put_user(p->bmv_block, &u->bmv_block) || 1502 put_user(p->bmv_length, &u->bmv_length) || 1503 put_user(0, &u->bmv_count) || 1504 put_user(0, &u->bmv_entries)) 1505 return false; 1506 if (recsize < sizeof(struct getbmapx)) 1507 return true; 1508 if (put_user(0, &u->bmv_iflags) || 1509 put_user(p->bmv_oflags, &u->bmv_oflags) || 1510 put_user(0, &u->bmv_unused1) || 1511 put_user(0, &u->bmv_unused2)) 1512 return false; 1513 return true; 1514 } 1515 1516 STATIC int 1517 xfs_ioc_getbmap( 1518 struct file *file, 1519 unsigned int cmd, 1520 void __user *arg) 1521 { 1522 struct getbmapx bmx = { 0 }; 1523 struct kgetbmap *buf; 1524 size_t recsize; 1525 int error, i; 1526 1527 switch (cmd) { 1528 case XFS_IOC_GETBMAPA: 1529 bmx.bmv_iflags = BMV_IF_ATTRFORK; 1530 fallthrough; 1531 case XFS_IOC_GETBMAP: 1532 /* struct getbmap is a strict subset of struct getbmapx. */ 1533 recsize = sizeof(struct getbmap); 1534 break; 1535 case XFS_IOC_GETBMAPX: 1536 recsize = sizeof(struct getbmapx); 1537 break; 1538 default: 1539 return -EINVAL; 1540 } 1541 1542 if (copy_from_user(&bmx, arg, recsize)) 1543 return -EFAULT; 1544 1545 if (bmx.bmv_count < 2) 1546 return -EINVAL; 1547 if (bmx.bmv_count > ULONG_MAX / recsize) 1548 return -ENOMEM; 1549 1550 buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL); 1551 if (!buf) 1552 return -ENOMEM; 1553 1554 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 1555 if (error) 1556 goto out_free_buf; 1557 1558 error = -EFAULT; 1559 if (copy_to_user(arg, &bmx, recsize)) 1560 goto out_free_buf; 1561 arg += recsize; 1562 1563 for (i = 0; i < bmx.bmv_entries; i++) { 1564 if (!xfs_getbmap_format(buf + i, arg, recsize)) 1565 goto out_free_buf; 1566 arg += recsize; 1567 } 1568 1569 error = 0; 1570 out_free_buf: 1571 kmem_free(buf); 1572 return error; 1573 } 1574 1575 STATIC int 1576 xfs_ioc_getfsmap( 1577 struct xfs_inode *ip, 1578 struct fsmap_head __user *arg) 1579 { 1580 struct xfs_fsmap_head xhead = {0}; 1581 struct fsmap_head head; 1582 struct fsmap *recs; 1583 unsigned int count; 1584 __u32 last_flags = 0; 1585 bool done = false; 1586 int error; 1587 1588 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1589 return -EFAULT; 1590 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1591 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1592 sizeof(head.fmh_keys[0].fmr_reserved)) || 1593 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1594 sizeof(head.fmh_keys[1].fmr_reserved))) 1595 return -EINVAL; 1596 1597 /* 1598 * Use an internal memory buffer so that we don't have to copy fsmap 1599 * data to userspace while holding locks. Start by trying to allocate 1600 * up to 128k for the buffer, but fall back to a single page if needed. 1601 */ 1602 count = min_t(unsigned int, head.fmh_count, 1603 131072 / sizeof(struct fsmap)); 1604 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL); 1605 if (!recs) { 1606 count = min_t(unsigned int, head.fmh_count, 1607 PAGE_SIZE / sizeof(struct fsmap)); 1608 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL); 1609 if (!recs) 1610 return -ENOMEM; 1611 } 1612 1613 xhead.fmh_iflags = head.fmh_iflags; 1614 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1615 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1616 1617 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1618 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1619 1620 head.fmh_entries = 0; 1621 do { 1622 struct fsmap __user *user_recs; 1623 struct fsmap *last_rec; 1624 1625 user_recs = &arg->fmh_recs[head.fmh_entries]; 1626 xhead.fmh_entries = 0; 1627 xhead.fmh_count = min_t(unsigned int, count, 1628 head.fmh_count - head.fmh_entries); 1629 1630 /* Run query, record how many entries we got. */ 1631 error = xfs_getfsmap(ip->i_mount, &xhead, recs); 1632 switch (error) { 1633 case 0: 1634 /* 1635 * There are no more records in the result set. Copy 1636 * whatever we got to userspace and break out. 1637 */ 1638 done = true; 1639 break; 1640 case -ECANCELED: 1641 /* 1642 * The internal memory buffer is full. Copy whatever 1643 * records we got to userspace and go again if we have 1644 * not yet filled the userspace buffer. 1645 */ 1646 error = 0; 1647 break; 1648 default: 1649 goto out_free; 1650 } 1651 head.fmh_entries += xhead.fmh_entries; 1652 head.fmh_oflags = xhead.fmh_oflags; 1653 1654 /* 1655 * If the caller wanted a record count or there aren't any 1656 * new records to return, we're done. 1657 */ 1658 if (head.fmh_count == 0 || xhead.fmh_entries == 0) 1659 break; 1660 1661 /* Copy all the records we got out to userspace. */ 1662 if (copy_to_user(user_recs, recs, 1663 xhead.fmh_entries * sizeof(struct fsmap))) { 1664 error = -EFAULT; 1665 goto out_free; 1666 } 1667 1668 /* Remember the last record flags we copied to userspace. */ 1669 last_rec = &recs[xhead.fmh_entries - 1]; 1670 last_flags = last_rec->fmr_flags; 1671 1672 /* Set up the low key for the next iteration. */ 1673 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec); 1674 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1675 } while (!done && head.fmh_entries < head.fmh_count); 1676 1677 /* 1678 * If there are no more records in the query result set and we're not 1679 * in counting mode, mark the last record returned with the LAST flag. 1680 */ 1681 if (done && head.fmh_count > 0 && head.fmh_entries > 0) { 1682 struct fsmap __user *user_rec; 1683 1684 last_flags |= FMR_OF_LAST; 1685 user_rec = &arg->fmh_recs[head.fmh_entries - 1]; 1686 1687 if (copy_to_user(&user_rec->fmr_flags, &last_flags, 1688 sizeof(last_flags))) { 1689 error = -EFAULT; 1690 goto out_free; 1691 } 1692 } 1693 1694 /* copy back header */ 1695 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) { 1696 error = -EFAULT; 1697 goto out_free; 1698 } 1699 1700 out_free: 1701 kmem_free(recs); 1702 return error; 1703 } 1704 1705 STATIC int 1706 xfs_ioc_scrub_metadata( 1707 struct file *file, 1708 void __user *arg) 1709 { 1710 struct xfs_scrub_metadata scrub; 1711 int error; 1712 1713 if (!capable(CAP_SYS_ADMIN)) 1714 return -EPERM; 1715 1716 if (copy_from_user(&scrub, arg, sizeof(scrub))) 1717 return -EFAULT; 1718 1719 error = xfs_scrub_metadata(file, &scrub); 1720 if (error) 1721 return error; 1722 1723 if (copy_to_user(arg, &scrub, sizeof(scrub))) 1724 return -EFAULT; 1725 1726 return 0; 1727 } 1728 1729 int 1730 xfs_ioc_swapext( 1731 xfs_swapext_t *sxp) 1732 { 1733 xfs_inode_t *ip, *tip; 1734 struct fd f, tmp; 1735 int error = 0; 1736 1737 /* Pull information for the target fd */ 1738 f = fdget((int)sxp->sx_fdtarget); 1739 if (!f.file) { 1740 error = -EINVAL; 1741 goto out; 1742 } 1743 1744 if (!(f.file->f_mode & FMODE_WRITE) || 1745 !(f.file->f_mode & FMODE_READ) || 1746 (f.file->f_flags & O_APPEND)) { 1747 error = -EBADF; 1748 goto out_put_file; 1749 } 1750 1751 tmp = fdget((int)sxp->sx_fdtmp); 1752 if (!tmp.file) { 1753 error = -EINVAL; 1754 goto out_put_file; 1755 } 1756 1757 if (!(tmp.file->f_mode & FMODE_WRITE) || 1758 !(tmp.file->f_mode & FMODE_READ) || 1759 (tmp.file->f_flags & O_APPEND)) { 1760 error = -EBADF; 1761 goto out_put_tmp_file; 1762 } 1763 1764 if (IS_SWAPFILE(file_inode(f.file)) || 1765 IS_SWAPFILE(file_inode(tmp.file))) { 1766 error = -EINVAL; 1767 goto out_put_tmp_file; 1768 } 1769 1770 /* 1771 * We need to ensure that the fds passed in point to XFS inodes 1772 * before we cast and access them as XFS structures as we have no 1773 * control over what the user passes us here. 1774 */ 1775 if (f.file->f_op != &xfs_file_operations || 1776 tmp.file->f_op != &xfs_file_operations) { 1777 error = -EINVAL; 1778 goto out_put_tmp_file; 1779 } 1780 1781 ip = XFS_I(file_inode(f.file)); 1782 tip = XFS_I(file_inode(tmp.file)); 1783 1784 if (ip->i_mount != tip->i_mount) { 1785 error = -EINVAL; 1786 goto out_put_tmp_file; 1787 } 1788 1789 if (ip->i_ino == tip->i_ino) { 1790 error = -EINVAL; 1791 goto out_put_tmp_file; 1792 } 1793 1794 if (xfs_is_shutdown(ip->i_mount)) { 1795 error = -EIO; 1796 goto out_put_tmp_file; 1797 } 1798 1799 error = xfs_swap_extents(ip, tip, sxp); 1800 1801 out_put_tmp_file: 1802 fdput(tmp); 1803 out_put_file: 1804 fdput(f); 1805 out: 1806 return error; 1807 } 1808 1809 static int 1810 xfs_ioc_getlabel( 1811 struct xfs_mount *mp, 1812 char __user *user_label) 1813 { 1814 struct xfs_sb *sbp = &mp->m_sb; 1815 char label[XFSLABEL_MAX + 1]; 1816 1817 /* Paranoia */ 1818 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 1819 1820 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 1821 memset(label, 0, sizeof(label)); 1822 spin_lock(&mp->m_sb_lock); 1823 strncpy(label, sbp->sb_fname, XFSLABEL_MAX); 1824 spin_unlock(&mp->m_sb_lock); 1825 1826 if (copy_to_user(user_label, label, sizeof(label))) 1827 return -EFAULT; 1828 return 0; 1829 } 1830 1831 static int 1832 xfs_ioc_setlabel( 1833 struct file *filp, 1834 struct xfs_mount *mp, 1835 char __user *newlabel) 1836 { 1837 struct xfs_sb *sbp = &mp->m_sb; 1838 char label[XFSLABEL_MAX + 1]; 1839 size_t len; 1840 int error; 1841 1842 if (!capable(CAP_SYS_ADMIN)) 1843 return -EPERM; 1844 /* 1845 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 1846 * smaller, at 12 bytes. We copy one more to be sure we find the 1847 * (required) NULL character to test the incoming label length. 1848 * NB: The on disk label doesn't need to be null terminated. 1849 */ 1850 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 1851 return -EFAULT; 1852 len = strnlen(label, XFSLABEL_MAX + 1); 1853 if (len > sizeof(sbp->sb_fname)) 1854 return -EINVAL; 1855 1856 error = mnt_want_write_file(filp); 1857 if (error) 1858 return error; 1859 1860 spin_lock(&mp->m_sb_lock); 1861 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 1862 memcpy(sbp->sb_fname, label, len); 1863 spin_unlock(&mp->m_sb_lock); 1864 1865 /* 1866 * Now we do several things to satisfy userspace. 1867 * In addition to normal logging of the primary superblock, we also 1868 * immediately write these changes to sector zero for the primary, then 1869 * update all backup supers (as xfs_db does for a label change), then 1870 * invalidate the block device page cache. This is so that any prior 1871 * buffered reads from userspace (i.e. from blkid) are invalidated, 1872 * and userspace will see the newly-written label. 1873 */ 1874 error = xfs_sync_sb_buf(mp); 1875 if (error) 1876 goto out; 1877 /* 1878 * growfs also updates backup supers so lock against that. 1879 */ 1880 mutex_lock(&mp->m_growlock); 1881 error = xfs_update_secondary_sbs(mp); 1882 mutex_unlock(&mp->m_growlock); 1883 1884 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 1885 1886 out: 1887 mnt_drop_write_file(filp); 1888 return error; 1889 } 1890 1891 static inline int 1892 xfs_fs_eofblocks_from_user( 1893 struct xfs_fs_eofblocks *src, 1894 struct xfs_icwalk *dst) 1895 { 1896 if (src->eof_version != XFS_EOFBLOCKS_VERSION) 1897 return -EINVAL; 1898 1899 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID) 1900 return -EINVAL; 1901 1902 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) || 1903 memchr_inv(src->pad64, 0, sizeof(src->pad64))) 1904 return -EINVAL; 1905 1906 dst->icw_flags = 0; 1907 if (src->eof_flags & XFS_EOF_FLAGS_SYNC) 1908 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC; 1909 if (src->eof_flags & XFS_EOF_FLAGS_UID) 1910 dst->icw_flags |= XFS_ICWALK_FLAG_UID; 1911 if (src->eof_flags & XFS_EOF_FLAGS_GID) 1912 dst->icw_flags |= XFS_ICWALK_FLAG_GID; 1913 if (src->eof_flags & XFS_EOF_FLAGS_PRID) 1914 dst->icw_flags |= XFS_ICWALK_FLAG_PRID; 1915 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE) 1916 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE; 1917 1918 dst->icw_prid = src->eof_prid; 1919 dst->icw_min_file_size = src->eof_min_file_size; 1920 1921 dst->icw_uid = INVALID_UID; 1922 if (src->eof_flags & XFS_EOF_FLAGS_UID) { 1923 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid); 1924 if (!uid_valid(dst->icw_uid)) 1925 return -EINVAL; 1926 } 1927 1928 dst->icw_gid = INVALID_GID; 1929 if (src->eof_flags & XFS_EOF_FLAGS_GID) { 1930 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid); 1931 if (!gid_valid(dst->icw_gid)) 1932 return -EINVAL; 1933 } 1934 return 0; 1935 } 1936 1937 /* 1938 * Note: some of the ioctl's return positive numbers as a 1939 * byte count indicating success, such as readlink_by_handle. 1940 * So we don't "sign flip" like most other routines. This means 1941 * true errors need to be returned as a negative value. 1942 */ 1943 long 1944 xfs_file_ioctl( 1945 struct file *filp, 1946 unsigned int cmd, 1947 unsigned long p) 1948 { 1949 struct inode *inode = file_inode(filp); 1950 struct xfs_inode *ip = XFS_I(inode); 1951 struct xfs_mount *mp = ip->i_mount; 1952 void __user *arg = (void __user *)p; 1953 int error; 1954 1955 trace_xfs_file_ioctl(ip); 1956 1957 switch (cmd) { 1958 case FITRIM: 1959 return xfs_ioc_trim(mp, arg); 1960 case FS_IOC_GETFSLABEL: 1961 return xfs_ioc_getlabel(mp, arg); 1962 case FS_IOC_SETFSLABEL: 1963 return xfs_ioc_setlabel(filp, mp, arg); 1964 case XFS_IOC_ALLOCSP: 1965 case XFS_IOC_FREESP: 1966 case XFS_IOC_ALLOCSP64: 1967 case XFS_IOC_FREESP64: { 1968 xfs_flock64_t bf; 1969 1970 if (copy_from_user(&bf, arg, sizeof(bf))) 1971 return -EFAULT; 1972 return xfs_ioc_space(filp, &bf); 1973 } 1974 case XFS_IOC_DIOINFO: { 1975 struct xfs_buftarg *target = xfs_inode_buftarg(ip); 1976 struct dioattr da; 1977 1978 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1979 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1980 1981 if (copy_to_user(arg, &da, sizeof(da))) 1982 return -EFAULT; 1983 return 0; 1984 } 1985 1986 case XFS_IOC_FSBULKSTAT_SINGLE: 1987 case XFS_IOC_FSBULKSTAT: 1988 case XFS_IOC_FSINUMBERS: 1989 return xfs_ioc_fsbulkstat(filp, cmd, arg); 1990 1991 case XFS_IOC_BULKSTAT: 1992 return xfs_ioc_bulkstat(filp, cmd, arg); 1993 case XFS_IOC_INUMBERS: 1994 return xfs_ioc_inumbers(mp, cmd, arg); 1995 1996 case XFS_IOC_FSGEOMETRY_V1: 1997 return xfs_ioc_fsgeometry(mp, arg, 3); 1998 case XFS_IOC_FSGEOMETRY_V4: 1999 return xfs_ioc_fsgeometry(mp, arg, 4); 2000 case XFS_IOC_FSGEOMETRY: 2001 return xfs_ioc_fsgeometry(mp, arg, 5); 2002 2003 case XFS_IOC_AG_GEOMETRY: 2004 return xfs_ioc_ag_geometry(mp, arg); 2005 2006 case XFS_IOC_GETVERSION: 2007 return put_user(inode->i_generation, (int __user *)arg); 2008 2009 case XFS_IOC_FSGETXATTRA: 2010 return xfs_ioc_fsgetxattra(ip, arg); 2011 2012 case XFS_IOC_GETBMAP: 2013 case XFS_IOC_GETBMAPA: 2014 case XFS_IOC_GETBMAPX: 2015 return xfs_ioc_getbmap(filp, cmd, arg); 2016 2017 case FS_IOC_GETFSMAP: 2018 return xfs_ioc_getfsmap(ip, arg); 2019 2020 case XFS_IOC_SCRUB_METADATA: 2021 return xfs_ioc_scrub_metadata(filp, arg); 2022 2023 case XFS_IOC_FD_TO_HANDLE: 2024 case XFS_IOC_PATH_TO_HANDLE: 2025 case XFS_IOC_PATH_TO_FSHANDLE: { 2026 xfs_fsop_handlereq_t hreq; 2027 2028 if (copy_from_user(&hreq, arg, sizeof(hreq))) 2029 return -EFAULT; 2030 return xfs_find_handle(cmd, &hreq); 2031 } 2032 case XFS_IOC_OPEN_BY_HANDLE: { 2033 xfs_fsop_handlereq_t hreq; 2034 2035 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2036 return -EFAULT; 2037 return xfs_open_by_handle(filp, &hreq); 2038 } 2039 2040 case XFS_IOC_READLINK_BY_HANDLE: { 2041 xfs_fsop_handlereq_t hreq; 2042 2043 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2044 return -EFAULT; 2045 return xfs_readlink_by_handle(filp, &hreq); 2046 } 2047 case XFS_IOC_ATTRLIST_BY_HANDLE: 2048 return xfs_attrlist_by_handle(filp, arg); 2049 2050 case XFS_IOC_ATTRMULTI_BY_HANDLE: 2051 return xfs_attrmulti_by_handle(filp, arg); 2052 2053 case XFS_IOC_SWAPEXT: { 2054 struct xfs_swapext sxp; 2055 2056 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 2057 return -EFAULT; 2058 error = mnt_want_write_file(filp); 2059 if (error) 2060 return error; 2061 error = xfs_ioc_swapext(&sxp); 2062 mnt_drop_write_file(filp); 2063 return error; 2064 } 2065 2066 case XFS_IOC_FSCOUNTS: { 2067 xfs_fsop_counts_t out; 2068 2069 xfs_fs_counts(mp, &out); 2070 2071 if (copy_to_user(arg, &out, sizeof(out))) 2072 return -EFAULT; 2073 return 0; 2074 } 2075 2076 case XFS_IOC_SET_RESBLKS: { 2077 xfs_fsop_resblks_t inout; 2078 uint64_t in; 2079 2080 if (!capable(CAP_SYS_ADMIN)) 2081 return -EPERM; 2082 2083 if (xfs_is_readonly(mp)) 2084 return -EROFS; 2085 2086 if (copy_from_user(&inout, arg, sizeof(inout))) 2087 return -EFAULT; 2088 2089 error = mnt_want_write_file(filp); 2090 if (error) 2091 return error; 2092 2093 /* input parameter is passed in resblks field of structure */ 2094 in = inout.resblks; 2095 error = xfs_reserve_blocks(mp, &in, &inout); 2096 mnt_drop_write_file(filp); 2097 if (error) 2098 return error; 2099 2100 if (copy_to_user(arg, &inout, sizeof(inout))) 2101 return -EFAULT; 2102 return 0; 2103 } 2104 2105 case XFS_IOC_GET_RESBLKS: { 2106 xfs_fsop_resblks_t out; 2107 2108 if (!capable(CAP_SYS_ADMIN)) 2109 return -EPERM; 2110 2111 error = xfs_reserve_blocks(mp, NULL, &out); 2112 if (error) 2113 return error; 2114 2115 if (copy_to_user(arg, &out, sizeof(out))) 2116 return -EFAULT; 2117 2118 return 0; 2119 } 2120 2121 case XFS_IOC_FSGROWFSDATA: { 2122 struct xfs_growfs_data in; 2123 2124 if (copy_from_user(&in, arg, sizeof(in))) 2125 return -EFAULT; 2126 2127 error = mnt_want_write_file(filp); 2128 if (error) 2129 return error; 2130 error = xfs_growfs_data(mp, &in); 2131 mnt_drop_write_file(filp); 2132 return error; 2133 } 2134 2135 case XFS_IOC_FSGROWFSLOG: { 2136 struct xfs_growfs_log in; 2137 2138 if (copy_from_user(&in, arg, sizeof(in))) 2139 return -EFAULT; 2140 2141 error = mnt_want_write_file(filp); 2142 if (error) 2143 return error; 2144 error = xfs_growfs_log(mp, &in); 2145 mnt_drop_write_file(filp); 2146 return error; 2147 } 2148 2149 case XFS_IOC_FSGROWFSRT: { 2150 xfs_growfs_rt_t in; 2151 2152 if (copy_from_user(&in, arg, sizeof(in))) 2153 return -EFAULT; 2154 2155 error = mnt_want_write_file(filp); 2156 if (error) 2157 return error; 2158 error = xfs_growfs_rt(mp, &in); 2159 mnt_drop_write_file(filp); 2160 return error; 2161 } 2162 2163 case XFS_IOC_GOINGDOWN: { 2164 uint32_t in; 2165 2166 if (!capable(CAP_SYS_ADMIN)) 2167 return -EPERM; 2168 2169 if (get_user(in, (uint32_t __user *)arg)) 2170 return -EFAULT; 2171 2172 return xfs_fs_goingdown(mp, in); 2173 } 2174 2175 case XFS_IOC_ERROR_INJECTION: { 2176 xfs_error_injection_t in; 2177 2178 if (!capable(CAP_SYS_ADMIN)) 2179 return -EPERM; 2180 2181 if (copy_from_user(&in, arg, sizeof(in))) 2182 return -EFAULT; 2183 2184 return xfs_errortag_add(mp, in.errtag); 2185 } 2186 2187 case XFS_IOC_ERROR_CLEARALL: 2188 if (!capable(CAP_SYS_ADMIN)) 2189 return -EPERM; 2190 2191 return xfs_errortag_clearall(mp); 2192 2193 case XFS_IOC_FREE_EOFBLOCKS: { 2194 struct xfs_fs_eofblocks eofb; 2195 struct xfs_icwalk icw; 2196 2197 if (!capable(CAP_SYS_ADMIN)) 2198 return -EPERM; 2199 2200 if (xfs_is_readonly(mp)) 2201 return -EROFS; 2202 2203 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2204 return -EFAULT; 2205 2206 error = xfs_fs_eofblocks_from_user(&eofb, &icw); 2207 if (error) 2208 return error; 2209 2210 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_); 2211 2212 sb_start_write(mp->m_super); 2213 error = xfs_blockgc_free_space(mp, &icw); 2214 sb_end_write(mp->m_super); 2215 return error; 2216 } 2217 2218 default: 2219 return -ENOTTY; 2220 } 2221 } 2222