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 /* fall through */ 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_FORCED_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_FORCED_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_FORCED_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->m_sb, &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 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize); 1069 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) 1070 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize); 1071 fa->fsx_projid = ip->i_projid; 1072 if (ifp && !xfs_need_iread_extents(ifp)) 1073 fa->fsx_nextents = xfs_iext_count(ifp); 1074 else 1075 fa->fsx_nextents = xfs_ifork_nextents(ifp); 1076 } 1077 1078 STATIC int 1079 xfs_ioc_fsgetxattra( 1080 xfs_inode_t *ip, 1081 void __user *arg) 1082 { 1083 struct fileattr fa; 1084 1085 xfs_ilock(ip, XFS_ILOCK_SHARED); 1086 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa); 1087 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1088 1089 return copy_fsxattr_to_user(&fa, arg); 1090 } 1091 1092 int 1093 xfs_fileattr_get( 1094 struct dentry *dentry, 1095 struct fileattr *fa) 1096 { 1097 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 1098 1099 if (d_is_special(dentry)) 1100 return -ENOTTY; 1101 1102 xfs_ilock(ip, XFS_ILOCK_SHARED); 1103 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa); 1104 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1105 1106 return 0; 1107 } 1108 1109 STATIC uint16_t 1110 xfs_flags2diflags( 1111 struct xfs_inode *ip, 1112 unsigned int xflags) 1113 { 1114 /* can't set PREALLOC this way, just preserve it */ 1115 uint16_t di_flags = 1116 (ip->i_diflags & XFS_DIFLAG_PREALLOC); 1117 1118 if (xflags & FS_XFLAG_IMMUTABLE) 1119 di_flags |= XFS_DIFLAG_IMMUTABLE; 1120 if (xflags & FS_XFLAG_APPEND) 1121 di_flags |= XFS_DIFLAG_APPEND; 1122 if (xflags & FS_XFLAG_SYNC) 1123 di_flags |= XFS_DIFLAG_SYNC; 1124 if (xflags & FS_XFLAG_NOATIME) 1125 di_flags |= XFS_DIFLAG_NOATIME; 1126 if (xflags & FS_XFLAG_NODUMP) 1127 di_flags |= XFS_DIFLAG_NODUMP; 1128 if (xflags & FS_XFLAG_NODEFRAG) 1129 di_flags |= XFS_DIFLAG_NODEFRAG; 1130 if (xflags & FS_XFLAG_FILESTREAM) 1131 di_flags |= XFS_DIFLAG_FILESTREAM; 1132 if (S_ISDIR(VFS_I(ip)->i_mode)) { 1133 if (xflags & FS_XFLAG_RTINHERIT) 1134 di_flags |= XFS_DIFLAG_RTINHERIT; 1135 if (xflags & FS_XFLAG_NOSYMLINKS) 1136 di_flags |= XFS_DIFLAG_NOSYMLINKS; 1137 if (xflags & FS_XFLAG_EXTSZINHERIT) 1138 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 1139 if (xflags & FS_XFLAG_PROJINHERIT) 1140 di_flags |= XFS_DIFLAG_PROJINHERIT; 1141 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 1142 if (xflags & FS_XFLAG_REALTIME) 1143 di_flags |= XFS_DIFLAG_REALTIME; 1144 if (xflags & FS_XFLAG_EXTSIZE) 1145 di_flags |= XFS_DIFLAG_EXTSIZE; 1146 } 1147 1148 return di_flags; 1149 } 1150 1151 STATIC uint64_t 1152 xfs_flags2diflags2( 1153 struct xfs_inode *ip, 1154 unsigned int xflags) 1155 { 1156 uint64_t di_flags2 = 1157 (ip->i_diflags2 & (XFS_DIFLAG2_REFLINK | 1158 XFS_DIFLAG2_BIGTIME)); 1159 1160 if (xflags & FS_XFLAG_DAX) 1161 di_flags2 |= XFS_DIFLAG2_DAX; 1162 if (xflags & FS_XFLAG_COWEXTSIZE) 1163 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 1164 1165 return di_flags2; 1166 } 1167 1168 static int 1169 xfs_ioctl_setattr_xflags( 1170 struct xfs_trans *tp, 1171 struct xfs_inode *ip, 1172 struct fileattr *fa) 1173 { 1174 struct xfs_mount *mp = ip->i_mount; 1175 uint64_t i_flags2; 1176 1177 /* Can't change realtime flag if any extents are allocated. */ 1178 if ((ip->i_df.if_nextents || ip->i_delayed_blks) && 1179 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1180 return -EINVAL; 1181 1182 /* If realtime flag is set then must have realtime device */ 1183 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1184 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1185 (ip->i_extsize % mp->m_sb.sb_rextsize)) 1186 return -EINVAL; 1187 } 1188 1189 /* Clear reflink if we are actually able to set the rt flag. */ 1190 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1191 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK; 1192 1193 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1194 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1195 return -EINVAL; 1196 1197 /* diflags2 only valid for v3 inodes. */ 1198 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1199 if (i_flags2 && !xfs_sb_version_has_v3inode(&mp->m_sb)) 1200 return -EINVAL; 1201 1202 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 1203 ip->i_diflags2 = i_flags2; 1204 1205 xfs_diflags_to_iflags(ip, false); 1206 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1207 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1208 XFS_STATS_INC(mp, xs_ig_attrchg); 1209 return 0; 1210 } 1211 1212 static void 1213 xfs_ioctl_setattr_prepare_dax( 1214 struct xfs_inode *ip, 1215 struct fileattr *fa) 1216 { 1217 struct xfs_mount *mp = ip->i_mount; 1218 struct inode *inode = VFS_I(ip); 1219 1220 if (S_ISDIR(inode->i_mode)) 1221 return; 1222 1223 if ((mp->m_flags & XFS_MOUNT_DAX_ALWAYS) || 1224 (mp->m_flags & XFS_MOUNT_DAX_NEVER)) 1225 return; 1226 1227 if (((fa->fsx_xflags & FS_XFLAG_DAX) && 1228 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) || 1229 (!(fa->fsx_xflags & FS_XFLAG_DAX) && 1230 (ip->i_diflags2 & XFS_DIFLAG2_DAX))) 1231 d_mark_dontcache(inode); 1232 } 1233 1234 /* 1235 * Set up the transaction structure for the setattr operation, checking that we 1236 * have permission to do so. On success, return a clean transaction and the 1237 * inode locked exclusively ready for further operation specific checks. On 1238 * failure, return an error without modifying or locking the inode. 1239 */ 1240 static struct xfs_trans * 1241 xfs_ioctl_setattr_get_trans( 1242 struct xfs_inode *ip, 1243 struct xfs_dquot *pdqp) 1244 { 1245 struct xfs_mount *mp = ip->i_mount; 1246 struct xfs_trans *tp; 1247 int error = -EROFS; 1248 1249 if (mp->m_flags & XFS_MOUNT_RDONLY) 1250 goto out_error; 1251 error = -EIO; 1252 if (XFS_FORCED_SHUTDOWN(mp)) 1253 goto out_error; 1254 1255 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp, 1256 capable(CAP_FOWNER), &tp); 1257 if (error) 1258 goto out_error; 1259 1260 if (mp->m_flags & XFS_MOUNT_WSYNC) 1261 xfs_trans_set_sync(tp); 1262 1263 return tp; 1264 1265 out_error: 1266 return ERR_PTR(error); 1267 } 1268 1269 /* 1270 * extent size hint validation is somewhat cumbersome. Rules are: 1271 * 1272 * 1. extent size hint is only valid for directories and regular files 1273 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1274 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1275 * 4. can only be changed on regular files if no extents are allocated 1276 * 5. can be changed on directories at any time 1277 * 6. extsize hint of 0 turns off hints, clears inode flags. 1278 * 7. Extent size must be a multiple of the appropriate block size. 1279 * 8. for non-realtime files, the extent size hint must be limited 1280 * to half the AG size to avoid alignment extending the extent beyond the 1281 * limits of the AG. 1282 * 1283 * Please keep this function in sync with xfs_scrub_inode_extsize. 1284 */ 1285 static int 1286 xfs_ioctl_setattr_check_extsize( 1287 struct xfs_inode *ip, 1288 struct fileattr *fa) 1289 { 1290 struct xfs_mount *mp = ip->i_mount; 1291 xfs_extlen_t size; 1292 xfs_fsblock_t extsize_fsb; 1293 1294 if (!fa->fsx_valid) 1295 return 0; 1296 1297 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents && 1298 ((ip->i_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1299 return -EINVAL; 1300 1301 if (fa->fsx_extsize == 0) 1302 return 0; 1303 1304 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1305 if (extsize_fsb > MAXEXTLEN) 1306 return -EINVAL; 1307 1308 if (XFS_IS_REALTIME_INODE(ip) || 1309 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1310 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1311 } else { 1312 size = mp->m_sb.sb_blocksize; 1313 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1314 return -EINVAL; 1315 } 1316 1317 if (fa->fsx_extsize % size) 1318 return -EINVAL; 1319 1320 return 0; 1321 } 1322 1323 /* 1324 * CoW extent size hint validation rules are: 1325 * 1326 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1327 * The inode does not have to have any shared blocks, but it must be a v3. 1328 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1329 * for a directory, the hint is propagated to new files. 1330 * 3. Can be changed on files & directories at any time. 1331 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1332 * 5. Extent size must be a multiple of the appropriate block size. 1333 * 6. The extent size hint must be limited to half the AG size to avoid 1334 * alignment extending the extent beyond the limits of the AG. 1335 * 1336 * Please keep this function in sync with xfs_scrub_inode_cowextsize. 1337 */ 1338 static int 1339 xfs_ioctl_setattr_check_cowextsize( 1340 struct xfs_inode *ip, 1341 struct fileattr *fa) 1342 { 1343 struct xfs_mount *mp = ip->i_mount; 1344 xfs_extlen_t size; 1345 xfs_fsblock_t cowextsize_fsb; 1346 1347 if (!fa->fsx_valid) 1348 return 0; 1349 1350 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1351 return 0; 1352 1353 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb)) 1354 return -EINVAL; 1355 1356 if (fa->fsx_cowextsize == 0) 1357 return 0; 1358 1359 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1360 if (cowextsize_fsb > MAXEXTLEN) 1361 return -EINVAL; 1362 1363 size = mp->m_sb.sb_blocksize; 1364 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1365 return -EINVAL; 1366 1367 if (fa->fsx_cowextsize % size) 1368 return -EINVAL; 1369 1370 return 0; 1371 } 1372 1373 static int 1374 xfs_ioctl_setattr_check_projid( 1375 struct xfs_inode *ip, 1376 struct fileattr *fa) 1377 { 1378 if (!fa->fsx_valid) 1379 return 0; 1380 1381 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1382 if (fa->fsx_projid > (uint16_t)-1 && 1383 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1384 return -EINVAL; 1385 return 0; 1386 } 1387 1388 int 1389 xfs_fileattr_set( 1390 struct user_namespace *mnt_userns, 1391 struct dentry *dentry, 1392 struct fileattr *fa) 1393 { 1394 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 1395 struct xfs_mount *mp = ip->i_mount; 1396 struct xfs_trans *tp; 1397 struct xfs_dquot *pdqp = NULL; 1398 struct xfs_dquot *olddquot = NULL; 1399 int error; 1400 1401 trace_xfs_ioctl_setattr(ip); 1402 1403 if (d_is_special(dentry)) 1404 return -ENOTTY; 1405 1406 if (!fa->fsx_valid) { 1407 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | 1408 FS_NOATIME_FL | FS_NODUMP_FL | 1409 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL)) 1410 return -EOPNOTSUPP; 1411 } 1412 1413 error = xfs_ioctl_setattr_check_projid(ip, fa); 1414 if (error) 1415 return error; 1416 1417 /* 1418 * If disk quotas is on, we make sure that the dquots do exist on disk, 1419 * before we start any other transactions. Trying to do this later 1420 * is messy. We don't care to take a readlock to look at the ids 1421 * in inode here, because we can't hold it across the trans_reserve. 1422 * If the IDs do change before we take the ilock, we're covered 1423 * because the i_*dquot fields will get updated anyway. 1424 */ 1425 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) { 1426 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid, 1427 VFS_I(ip)->i_gid, fa->fsx_projid, 1428 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp); 1429 if (error) 1430 return error; 1431 } 1432 1433 xfs_ioctl_setattr_prepare_dax(ip, fa); 1434 1435 tp = xfs_ioctl_setattr_get_trans(ip, pdqp); 1436 if (IS_ERR(tp)) { 1437 error = PTR_ERR(tp); 1438 goto error_free_dquots; 1439 } 1440 1441 error = xfs_ioctl_setattr_check_extsize(ip, fa); 1442 if (error) 1443 goto error_trans_cancel; 1444 1445 error = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1446 if (error) 1447 goto error_trans_cancel; 1448 1449 error = xfs_ioctl_setattr_xflags(tp, ip, fa); 1450 if (error) 1451 goto error_trans_cancel; 1452 1453 if (!fa->fsx_valid) 1454 goto skip_xattr; 1455 /* 1456 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1457 * overrides the following restrictions: 1458 * 1459 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1460 * successful return from chown() 1461 */ 1462 1463 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1464 !capable_wrt_inode_uidgid(mnt_userns, VFS_I(ip), CAP_FSETID)) 1465 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1466 1467 /* Change the ownerships and register project quota modifications */ 1468 if (ip->i_projid != fa->fsx_projid) { 1469 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1470 olddquot = xfs_qm_vop_chown(tp, ip, 1471 &ip->i_pdquot, pdqp); 1472 } 1473 ip->i_projid = fa->fsx_projid; 1474 } 1475 1476 /* 1477 * Only set the extent size hint if we've already determined that the 1478 * extent size hint should be set on the inode. If no extent size flags 1479 * are set on the inode then unconditionally clear the extent size hint. 1480 */ 1481 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1482 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1483 else 1484 ip->i_extsize = 0; 1485 1486 if (xfs_sb_version_has_v3inode(&mp->m_sb)) { 1487 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) 1488 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1489 else 1490 ip->i_cowextsize = 0; 1491 } 1492 1493 skip_xattr: 1494 error = xfs_trans_commit(tp); 1495 1496 /* 1497 * Release any dquot(s) the inode had kept before chown. 1498 */ 1499 xfs_qm_dqrele(olddquot); 1500 xfs_qm_dqrele(pdqp); 1501 1502 return error; 1503 1504 error_trans_cancel: 1505 xfs_trans_cancel(tp); 1506 error_free_dquots: 1507 xfs_qm_dqrele(pdqp); 1508 return error; 1509 } 1510 1511 static bool 1512 xfs_getbmap_format( 1513 struct kgetbmap *p, 1514 struct getbmapx __user *u, 1515 size_t recsize) 1516 { 1517 if (put_user(p->bmv_offset, &u->bmv_offset) || 1518 put_user(p->bmv_block, &u->bmv_block) || 1519 put_user(p->bmv_length, &u->bmv_length) || 1520 put_user(0, &u->bmv_count) || 1521 put_user(0, &u->bmv_entries)) 1522 return false; 1523 if (recsize < sizeof(struct getbmapx)) 1524 return true; 1525 if (put_user(0, &u->bmv_iflags) || 1526 put_user(p->bmv_oflags, &u->bmv_oflags) || 1527 put_user(0, &u->bmv_unused1) || 1528 put_user(0, &u->bmv_unused2)) 1529 return false; 1530 return true; 1531 } 1532 1533 STATIC int 1534 xfs_ioc_getbmap( 1535 struct file *file, 1536 unsigned int cmd, 1537 void __user *arg) 1538 { 1539 struct getbmapx bmx = { 0 }; 1540 struct kgetbmap *buf; 1541 size_t recsize; 1542 int error, i; 1543 1544 switch (cmd) { 1545 case XFS_IOC_GETBMAPA: 1546 bmx.bmv_iflags = BMV_IF_ATTRFORK; 1547 /*FALLTHRU*/ 1548 case XFS_IOC_GETBMAP: 1549 /* struct getbmap is a strict subset of struct getbmapx. */ 1550 recsize = sizeof(struct getbmap); 1551 break; 1552 case XFS_IOC_GETBMAPX: 1553 recsize = sizeof(struct getbmapx); 1554 break; 1555 default: 1556 return -EINVAL; 1557 } 1558 1559 if (copy_from_user(&bmx, arg, recsize)) 1560 return -EFAULT; 1561 1562 if (bmx.bmv_count < 2) 1563 return -EINVAL; 1564 if (bmx.bmv_count > ULONG_MAX / recsize) 1565 return -ENOMEM; 1566 1567 buf = kvzalloc(bmx.bmv_count * sizeof(*buf), GFP_KERNEL); 1568 if (!buf) 1569 return -ENOMEM; 1570 1571 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 1572 if (error) 1573 goto out_free_buf; 1574 1575 error = -EFAULT; 1576 if (copy_to_user(arg, &bmx, recsize)) 1577 goto out_free_buf; 1578 arg += recsize; 1579 1580 for (i = 0; i < bmx.bmv_entries; i++) { 1581 if (!xfs_getbmap_format(buf + i, arg, recsize)) 1582 goto out_free_buf; 1583 arg += recsize; 1584 } 1585 1586 error = 0; 1587 out_free_buf: 1588 kmem_free(buf); 1589 return error; 1590 } 1591 1592 STATIC int 1593 xfs_ioc_getfsmap( 1594 struct xfs_inode *ip, 1595 struct fsmap_head __user *arg) 1596 { 1597 struct xfs_fsmap_head xhead = {0}; 1598 struct fsmap_head head; 1599 struct fsmap *recs; 1600 unsigned int count; 1601 __u32 last_flags = 0; 1602 bool done = false; 1603 int error; 1604 1605 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1606 return -EFAULT; 1607 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1608 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1609 sizeof(head.fmh_keys[0].fmr_reserved)) || 1610 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1611 sizeof(head.fmh_keys[1].fmr_reserved))) 1612 return -EINVAL; 1613 1614 /* 1615 * Use an internal memory buffer so that we don't have to copy fsmap 1616 * data to userspace while holding locks. Start by trying to allocate 1617 * up to 128k for the buffer, but fall back to a single page if needed. 1618 */ 1619 count = min_t(unsigned int, head.fmh_count, 1620 131072 / sizeof(struct fsmap)); 1621 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL); 1622 if (!recs) { 1623 count = min_t(unsigned int, head.fmh_count, 1624 PAGE_SIZE / sizeof(struct fsmap)); 1625 recs = kvzalloc(count * sizeof(struct fsmap), GFP_KERNEL); 1626 if (!recs) 1627 return -ENOMEM; 1628 } 1629 1630 xhead.fmh_iflags = head.fmh_iflags; 1631 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1632 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1633 1634 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1635 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1636 1637 head.fmh_entries = 0; 1638 do { 1639 struct fsmap __user *user_recs; 1640 struct fsmap *last_rec; 1641 1642 user_recs = &arg->fmh_recs[head.fmh_entries]; 1643 xhead.fmh_entries = 0; 1644 xhead.fmh_count = min_t(unsigned int, count, 1645 head.fmh_count - head.fmh_entries); 1646 1647 /* Run query, record how many entries we got. */ 1648 error = xfs_getfsmap(ip->i_mount, &xhead, recs); 1649 switch (error) { 1650 case 0: 1651 /* 1652 * There are no more records in the result set. Copy 1653 * whatever we got to userspace and break out. 1654 */ 1655 done = true; 1656 break; 1657 case -ECANCELED: 1658 /* 1659 * The internal memory buffer is full. Copy whatever 1660 * records we got to userspace and go again if we have 1661 * not yet filled the userspace buffer. 1662 */ 1663 error = 0; 1664 break; 1665 default: 1666 goto out_free; 1667 } 1668 head.fmh_entries += xhead.fmh_entries; 1669 head.fmh_oflags = xhead.fmh_oflags; 1670 1671 /* 1672 * If the caller wanted a record count or there aren't any 1673 * new records to return, we're done. 1674 */ 1675 if (head.fmh_count == 0 || xhead.fmh_entries == 0) 1676 break; 1677 1678 /* Copy all the records we got out to userspace. */ 1679 if (copy_to_user(user_recs, recs, 1680 xhead.fmh_entries * sizeof(struct fsmap))) { 1681 error = -EFAULT; 1682 goto out_free; 1683 } 1684 1685 /* Remember the last record flags we copied to userspace. */ 1686 last_rec = &recs[xhead.fmh_entries - 1]; 1687 last_flags = last_rec->fmr_flags; 1688 1689 /* Set up the low key for the next iteration. */ 1690 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec); 1691 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1692 } while (!done && head.fmh_entries < head.fmh_count); 1693 1694 /* 1695 * If there are no more records in the query result set and we're not 1696 * in counting mode, mark the last record returned with the LAST flag. 1697 */ 1698 if (done && head.fmh_count > 0 && head.fmh_entries > 0) { 1699 struct fsmap __user *user_rec; 1700 1701 last_flags |= FMR_OF_LAST; 1702 user_rec = &arg->fmh_recs[head.fmh_entries - 1]; 1703 1704 if (copy_to_user(&user_rec->fmr_flags, &last_flags, 1705 sizeof(last_flags))) { 1706 error = -EFAULT; 1707 goto out_free; 1708 } 1709 } 1710 1711 /* copy back header */ 1712 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) { 1713 error = -EFAULT; 1714 goto out_free; 1715 } 1716 1717 out_free: 1718 kmem_free(recs); 1719 return error; 1720 } 1721 1722 STATIC int 1723 xfs_ioc_scrub_metadata( 1724 struct file *file, 1725 void __user *arg) 1726 { 1727 struct xfs_scrub_metadata scrub; 1728 int error; 1729 1730 if (!capable(CAP_SYS_ADMIN)) 1731 return -EPERM; 1732 1733 if (copy_from_user(&scrub, arg, sizeof(scrub))) 1734 return -EFAULT; 1735 1736 error = xfs_scrub_metadata(file, &scrub); 1737 if (error) 1738 return error; 1739 1740 if (copy_to_user(arg, &scrub, sizeof(scrub))) 1741 return -EFAULT; 1742 1743 return 0; 1744 } 1745 1746 int 1747 xfs_ioc_swapext( 1748 xfs_swapext_t *sxp) 1749 { 1750 xfs_inode_t *ip, *tip; 1751 struct fd f, tmp; 1752 int error = 0; 1753 1754 /* Pull information for the target fd */ 1755 f = fdget((int)sxp->sx_fdtarget); 1756 if (!f.file) { 1757 error = -EINVAL; 1758 goto out; 1759 } 1760 1761 if (!(f.file->f_mode & FMODE_WRITE) || 1762 !(f.file->f_mode & FMODE_READ) || 1763 (f.file->f_flags & O_APPEND)) { 1764 error = -EBADF; 1765 goto out_put_file; 1766 } 1767 1768 tmp = fdget((int)sxp->sx_fdtmp); 1769 if (!tmp.file) { 1770 error = -EINVAL; 1771 goto out_put_file; 1772 } 1773 1774 if (!(tmp.file->f_mode & FMODE_WRITE) || 1775 !(tmp.file->f_mode & FMODE_READ) || 1776 (tmp.file->f_flags & O_APPEND)) { 1777 error = -EBADF; 1778 goto out_put_tmp_file; 1779 } 1780 1781 if (IS_SWAPFILE(file_inode(f.file)) || 1782 IS_SWAPFILE(file_inode(tmp.file))) { 1783 error = -EINVAL; 1784 goto out_put_tmp_file; 1785 } 1786 1787 /* 1788 * We need to ensure that the fds passed in point to XFS inodes 1789 * before we cast and access them as XFS structures as we have no 1790 * control over what the user passes us here. 1791 */ 1792 if (f.file->f_op != &xfs_file_operations || 1793 tmp.file->f_op != &xfs_file_operations) { 1794 error = -EINVAL; 1795 goto out_put_tmp_file; 1796 } 1797 1798 ip = XFS_I(file_inode(f.file)); 1799 tip = XFS_I(file_inode(tmp.file)); 1800 1801 if (ip->i_mount != tip->i_mount) { 1802 error = -EINVAL; 1803 goto out_put_tmp_file; 1804 } 1805 1806 if (ip->i_ino == tip->i_ino) { 1807 error = -EINVAL; 1808 goto out_put_tmp_file; 1809 } 1810 1811 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1812 error = -EIO; 1813 goto out_put_tmp_file; 1814 } 1815 1816 error = xfs_swap_extents(ip, tip, sxp); 1817 1818 out_put_tmp_file: 1819 fdput(tmp); 1820 out_put_file: 1821 fdput(f); 1822 out: 1823 return error; 1824 } 1825 1826 static int 1827 xfs_ioc_getlabel( 1828 struct xfs_mount *mp, 1829 char __user *user_label) 1830 { 1831 struct xfs_sb *sbp = &mp->m_sb; 1832 char label[XFSLABEL_MAX + 1]; 1833 1834 /* Paranoia */ 1835 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 1836 1837 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 1838 memset(label, 0, sizeof(label)); 1839 spin_lock(&mp->m_sb_lock); 1840 strncpy(label, sbp->sb_fname, XFSLABEL_MAX); 1841 spin_unlock(&mp->m_sb_lock); 1842 1843 if (copy_to_user(user_label, label, sizeof(label))) 1844 return -EFAULT; 1845 return 0; 1846 } 1847 1848 static int 1849 xfs_ioc_setlabel( 1850 struct file *filp, 1851 struct xfs_mount *mp, 1852 char __user *newlabel) 1853 { 1854 struct xfs_sb *sbp = &mp->m_sb; 1855 char label[XFSLABEL_MAX + 1]; 1856 size_t len; 1857 int error; 1858 1859 if (!capable(CAP_SYS_ADMIN)) 1860 return -EPERM; 1861 /* 1862 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 1863 * smaller, at 12 bytes. We copy one more to be sure we find the 1864 * (required) NULL character to test the incoming label length. 1865 * NB: The on disk label doesn't need to be null terminated. 1866 */ 1867 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 1868 return -EFAULT; 1869 len = strnlen(label, XFSLABEL_MAX + 1); 1870 if (len > sizeof(sbp->sb_fname)) 1871 return -EINVAL; 1872 1873 error = mnt_want_write_file(filp); 1874 if (error) 1875 return error; 1876 1877 spin_lock(&mp->m_sb_lock); 1878 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 1879 memcpy(sbp->sb_fname, label, len); 1880 spin_unlock(&mp->m_sb_lock); 1881 1882 /* 1883 * Now we do several things to satisfy userspace. 1884 * In addition to normal logging of the primary superblock, we also 1885 * immediately write these changes to sector zero for the primary, then 1886 * update all backup supers (as xfs_db does for a label change), then 1887 * invalidate the block device page cache. This is so that any prior 1888 * buffered reads from userspace (i.e. from blkid) are invalidated, 1889 * and userspace will see the newly-written label. 1890 */ 1891 error = xfs_sync_sb_buf(mp); 1892 if (error) 1893 goto out; 1894 /* 1895 * growfs also updates backup supers so lock against that. 1896 */ 1897 mutex_lock(&mp->m_growlock); 1898 error = xfs_update_secondary_sbs(mp); 1899 mutex_unlock(&mp->m_growlock); 1900 1901 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 1902 1903 out: 1904 mnt_drop_write_file(filp); 1905 return error; 1906 } 1907 1908 static inline int 1909 xfs_fs_eofblocks_from_user( 1910 struct xfs_fs_eofblocks *src, 1911 struct xfs_eofblocks *dst) 1912 { 1913 if (src->eof_version != XFS_EOFBLOCKS_VERSION) 1914 return -EINVAL; 1915 1916 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID) 1917 return -EINVAL; 1918 1919 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) || 1920 memchr_inv(src->pad64, 0, sizeof(src->pad64))) 1921 return -EINVAL; 1922 1923 dst->eof_flags = src->eof_flags; 1924 dst->eof_prid = src->eof_prid; 1925 dst->eof_min_file_size = src->eof_min_file_size; 1926 1927 dst->eof_uid = INVALID_UID; 1928 if (src->eof_flags & XFS_EOF_FLAGS_UID) { 1929 dst->eof_uid = make_kuid(current_user_ns(), src->eof_uid); 1930 if (!uid_valid(dst->eof_uid)) 1931 return -EINVAL; 1932 } 1933 1934 dst->eof_gid = INVALID_GID; 1935 if (src->eof_flags & XFS_EOF_FLAGS_GID) { 1936 dst->eof_gid = make_kgid(current_user_ns(), src->eof_gid); 1937 if (!gid_valid(dst->eof_gid)) 1938 return -EINVAL; 1939 } 1940 return 0; 1941 } 1942 1943 /* 1944 * Note: some of the ioctl's return positive numbers as a 1945 * byte count indicating success, such as readlink_by_handle. 1946 * So we don't "sign flip" like most other routines. This means 1947 * true errors need to be returned as a negative value. 1948 */ 1949 long 1950 xfs_file_ioctl( 1951 struct file *filp, 1952 unsigned int cmd, 1953 unsigned long p) 1954 { 1955 struct inode *inode = file_inode(filp); 1956 struct xfs_inode *ip = XFS_I(inode); 1957 struct xfs_mount *mp = ip->i_mount; 1958 void __user *arg = (void __user *)p; 1959 int error; 1960 1961 trace_xfs_file_ioctl(ip); 1962 1963 switch (cmd) { 1964 case FITRIM: 1965 return xfs_ioc_trim(mp, arg); 1966 case FS_IOC_GETFSLABEL: 1967 return xfs_ioc_getlabel(mp, arg); 1968 case FS_IOC_SETFSLABEL: 1969 return xfs_ioc_setlabel(filp, mp, arg); 1970 case XFS_IOC_ALLOCSP: 1971 case XFS_IOC_FREESP: 1972 case XFS_IOC_ALLOCSP64: 1973 case XFS_IOC_FREESP64: { 1974 xfs_flock64_t bf; 1975 1976 if (copy_from_user(&bf, arg, sizeof(bf))) 1977 return -EFAULT; 1978 return xfs_ioc_space(filp, &bf); 1979 } 1980 case XFS_IOC_DIOINFO: { 1981 struct xfs_buftarg *target = xfs_inode_buftarg(ip); 1982 struct dioattr da; 1983 1984 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1985 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1986 1987 if (copy_to_user(arg, &da, sizeof(da))) 1988 return -EFAULT; 1989 return 0; 1990 } 1991 1992 case XFS_IOC_FSBULKSTAT_SINGLE: 1993 case XFS_IOC_FSBULKSTAT: 1994 case XFS_IOC_FSINUMBERS: 1995 return xfs_ioc_fsbulkstat(filp, cmd, arg); 1996 1997 case XFS_IOC_BULKSTAT: 1998 return xfs_ioc_bulkstat(filp, cmd, arg); 1999 case XFS_IOC_INUMBERS: 2000 return xfs_ioc_inumbers(mp, cmd, arg); 2001 2002 case XFS_IOC_FSGEOMETRY_V1: 2003 return xfs_ioc_fsgeometry(mp, arg, 3); 2004 case XFS_IOC_FSGEOMETRY_V4: 2005 return xfs_ioc_fsgeometry(mp, arg, 4); 2006 case XFS_IOC_FSGEOMETRY: 2007 return xfs_ioc_fsgeometry(mp, arg, 5); 2008 2009 case XFS_IOC_AG_GEOMETRY: 2010 return xfs_ioc_ag_geometry(mp, arg); 2011 2012 case XFS_IOC_GETVERSION: 2013 return put_user(inode->i_generation, (int __user *)arg); 2014 2015 case XFS_IOC_FSGETXATTRA: 2016 return xfs_ioc_fsgetxattra(ip, arg); 2017 2018 case XFS_IOC_GETBMAP: 2019 case XFS_IOC_GETBMAPA: 2020 case XFS_IOC_GETBMAPX: 2021 return xfs_ioc_getbmap(filp, cmd, arg); 2022 2023 case FS_IOC_GETFSMAP: 2024 return xfs_ioc_getfsmap(ip, arg); 2025 2026 case XFS_IOC_SCRUB_METADATA: 2027 return xfs_ioc_scrub_metadata(filp, arg); 2028 2029 case XFS_IOC_FD_TO_HANDLE: 2030 case XFS_IOC_PATH_TO_HANDLE: 2031 case XFS_IOC_PATH_TO_FSHANDLE: { 2032 xfs_fsop_handlereq_t hreq; 2033 2034 if (copy_from_user(&hreq, arg, sizeof(hreq))) 2035 return -EFAULT; 2036 return xfs_find_handle(cmd, &hreq); 2037 } 2038 case XFS_IOC_OPEN_BY_HANDLE: { 2039 xfs_fsop_handlereq_t hreq; 2040 2041 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2042 return -EFAULT; 2043 return xfs_open_by_handle(filp, &hreq); 2044 } 2045 2046 case XFS_IOC_READLINK_BY_HANDLE: { 2047 xfs_fsop_handlereq_t hreq; 2048 2049 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2050 return -EFAULT; 2051 return xfs_readlink_by_handle(filp, &hreq); 2052 } 2053 case XFS_IOC_ATTRLIST_BY_HANDLE: 2054 return xfs_attrlist_by_handle(filp, arg); 2055 2056 case XFS_IOC_ATTRMULTI_BY_HANDLE: 2057 return xfs_attrmulti_by_handle(filp, arg); 2058 2059 case XFS_IOC_SWAPEXT: { 2060 struct xfs_swapext sxp; 2061 2062 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 2063 return -EFAULT; 2064 error = mnt_want_write_file(filp); 2065 if (error) 2066 return error; 2067 error = xfs_ioc_swapext(&sxp); 2068 mnt_drop_write_file(filp); 2069 return error; 2070 } 2071 2072 case XFS_IOC_FSCOUNTS: { 2073 xfs_fsop_counts_t out; 2074 2075 xfs_fs_counts(mp, &out); 2076 2077 if (copy_to_user(arg, &out, sizeof(out))) 2078 return -EFAULT; 2079 return 0; 2080 } 2081 2082 case XFS_IOC_SET_RESBLKS: { 2083 xfs_fsop_resblks_t inout; 2084 uint64_t in; 2085 2086 if (!capable(CAP_SYS_ADMIN)) 2087 return -EPERM; 2088 2089 if (mp->m_flags & XFS_MOUNT_RDONLY) 2090 return -EROFS; 2091 2092 if (copy_from_user(&inout, arg, sizeof(inout))) 2093 return -EFAULT; 2094 2095 error = mnt_want_write_file(filp); 2096 if (error) 2097 return error; 2098 2099 /* input parameter is passed in resblks field of structure */ 2100 in = inout.resblks; 2101 error = xfs_reserve_blocks(mp, &in, &inout); 2102 mnt_drop_write_file(filp); 2103 if (error) 2104 return error; 2105 2106 if (copy_to_user(arg, &inout, sizeof(inout))) 2107 return -EFAULT; 2108 return 0; 2109 } 2110 2111 case XFS_IOC_GET_RESBLKS: { 2112 xfs_fsop_resblks_t out; 2113 2114 if (!capable(CAP_SYS_ADMIN)) 2115 return -EPERM; 2116 2117 error = xfs_reserve_blocks(mp, NULL, &out); 2118 if (error) 2119 return error; 2120 2121 if (copy_to_user(arg, &out, sizeof(out))) 2122 return -EFAULT; 2123 2124 return 0; 2125 } 2126 2127 case XFS_IOC_FSGROWFSDATA: { 2128 struct xfs_growfs_data in; 2129 2130 if (copy_from_user(&in, arg, sizeof(in))) 2131 return -EFAULT; 2132 2133 error = mnt_want_write_file(filp); 2134 if (error) 2135 return error; 2136 error = xfs_growfs_data(mp, &in); 2137 mnt_drop_write_file(filp); 2138 return error; 2139 } 2140 2141 case XFS_IOC_FSGROWFSLOG: { 2142 struct xfs_growfs_log in; 2143 2144 if (copy_from_user(&in, arg, sizeof(in))) 2145 return -EFAULT; 2146 2147 error = mnt_want_write_file(filp); 2148 if (error) 2149 return error; 2150 error = xfs_growfs_log(mp, &in); 2151 mnt_drop_write_file(filp); 2152 return error; 2153 } 2154 2155 case XFS_IOC_FSGROWFSRT: { 2156 xfs_growfs_rt_t in; 2157 2158 if (copy_from_user(&in, arg, sizeof(in))) 2159 return -EFAULT; 2160 2161 error = mnt_want_write_file(filp); 2162 if (error) 2163 return error; 2164 error = xfs_growfs_rt(mp, &in); 2165 mnt_drop_write_file(filp); 2166 return error; 2167 } 2168 2169 case XFS_IOC_GOINGDOWN: { 2170 uint32_t in; 2171 2172 if (!capable(CAP_SYS_ADMIN)) 2173 return -EPERM; 2174 2175 if (get_user(in, (uint32_t __user *)arg)) 2176 return -EFAULT; 2177 2178 return xfs_fs_goingdown(mp, in); 2179 } 2180 2181 case XFS_IOC_ERROR_INJECTION: { 2182 xfs_error_injection_t in; 2183 2184 if (!capable(CAP_SYS_ADMIN)) 2185 return -EPERM; 2186 2187 if (copy_from_user(&in, arg, sizeof(in))) 2188 return -EFAULT; 2189 2190 return xfs_errortag_add(mp, in.errtag); 2191 } 2192 2193 case XFS_IOC_ERROR_CLEARALL: 2194 if (!capable(CAP_SYS_ADMIN)) 2195 return -EPERM; 2196 2197 return xfs_errortag_clearall(mp); 2198 2199 case XFS_IOC_FREE_EOFBLOCKS: { 2200 struct xfs_fs_eofblocks eofb; 2201 struct xfs_eofblocks keofb; 2202 2203 if (!capable(CAP_SYS_ADMIN)) 2204 return -EPERM; 2205 2206 if (mp->m_flags & XFS_MOUNT_RDONLY) 2207 return -EROFS; 2208 2209 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2210 return -EFAULT; 2211 2212 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 2213 if (error) 2214 return error; 2215 2216 trace_xfs_ioc_free_eofblocks(mp, &keofb, _RET_IP_); 2217 2218 sb_start_write(mp->m_super); 2219 error = xfs_blockgc_free_space(mp, &keofb); 2220 sb_end_write(mp->m_super); 2221 return error; 2222 } 2223 2224 default: 2225 return -ENOTTY; 2226 } 2227 } 2228