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_ioctl.h" 15 #include "xfs_alloc.h" 16 #include "xfs_rtalloc.h" 17 #include "xfs_itable.h" 18 #include "xfs_error.h" 19 #include "xfs_attr.h" 20 #include "xfs_bmap.h" 21 #include "xfs_bmap_util.h" 22 #include "xfs_fsops.h" 23 #include "xfs_discard.h" 24 #include "xfs_quota.h" 25 #include "xfs_export.h" 26 #include "xfs_trace.h" 27 #include "xfs_icache.h" 28 #include "xfs_symlink.h" 29 #include "xfs_trans.h" 30 #include "xfs_acl.h" 31 #include "xfs_btree.h" 32 #include <linux/fsmap.h> 33 #include "xfs_fsmap.h" 34 #include "scrub/xfs_scrub.h" 35 #include "xfs_sb.h" 36 37 #include <linux/capability.h> 38 #include <linux/cred.h> 39 #include <linux/dcache.h> 40 #include <linux/mount.h> 41 #include <linux/namei.h> 42 #include <linux/pagemap.h> 43 #include <linux/slab.h> 44 #include <linux/exportfs.h> 45 46 /* 47 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 48 * a file or fs handle. 49 * 50 * XFS_IOC_PATH_TO_FSHANDLE 51 * returns fs handle for a mount point or path within that mount point 52 * XFS_IOC_FD_TO_HANDLE 53 * returns full handle for a FD opened in user space 54 * XFS_IOC_PATH_TO_HANDLE 55 * returns full handle for a path 56 */ 57 int 58 xfs_find_handle( 59 unsigned int cmd, 60 xfs_fsop_handlereq_t *hreq) 61 { 62 int hsize; 63 xfs_handle_t handle; 64 struct inode *inode; 65 struct fd f = {NULL}; 66 struct path path; 67 int error; 68 struct xfs_inode *ip; 69 70 if (cmd == XFS_IOC_FD_TO_HANDLE) { 71 f = fdget(hreq->fd); 72 if (!f.file) 73 return -EBADF; 74 inode = file_inode(f.file); 75 } else { 76 error = user_lpath((const char __user *)hreq->path, &path); 77 if (error) 78 return error; 79 inode = d_inode(path.dentry); 80 } 81 ip = XFS_I(inode); 82 83 /* 84 * We can only generate handles for inodes residing on a XFS filesystem, 85 * and only for regular files, directories or symbolic links. 86 */ 87 error = -EINVAL; 88 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 89 goto out_put; 90 91 error = -EBADF; 92 if (!S_ISREG(inode->i_mode) && 93 !S_ISDIR(inode->i_mode) && 94 !S_ISLNK(inode->i_mode)) 95 goto out_put; 96 97 98 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 99 100 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 101 /* 102 * This handle only contains an fsid, zero the rest. 103 */ 104 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 105 hsize = sizeof(xfs_fsid_t); 106 } else { 107 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 108 sizeof(handle.ha_fid.fid_len); 109 handle.ha_fid.fid_pad = 0; 110 handle.ha_fid.fid_gen = inode->i_generation; 111 handle.ha_fid.fid_ino = ip->i_ino; 112 hsize = sizeof(xfs_handle_t); 113 } 114 115 error = -EFAULT; 116 if (copy_to_user(hreq->ohandle, &handle, hsize) || 117 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 118 goto out_put; 119 120 error = 0; 121 122 out_put: 123 if (cmd == XFS_IOC_FD_TO_HANDLE) 124 fdput(f); 125 else 126 path_put(&path); 127 return error; 128 } 129 130 /* 131 * No need to do permission checks on the various pathname components 132 * as the handle operations are privileged. 133 */ 134 STATIC int 135 xfs_handle_acceptable( 136 void *context, 137 struct dentry *dentry) 138 { 139 return 1; 140 } 141 142 /* 143 * Convert userspace handle data into a dentry. 144 */ 145 struct dentry * 146 xfs_handle_to_dentry( 147 struct file *parfilp, 148 void __user *uhandle, 149 u32 hlen) 150 { 151 xfs_handle_t handle; 152 struct xfs_fid64 fid; 153 154 /* 155 * Only allow handle opens under a directory. 156 */ 157 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 158 return ERR_PTR(-ENOTDIR); 159 160 if (hlen != sizeof(xfs_handle_t)) 161 return ERR_PTR(-EINVAL); 162 if (copy_from_user(&handle, uhandle, hlen)) 163 return ERR_PTR(-EFAULT); 164 if (handle.ha_fid.fid_len != 165 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 166 return ERR_PTR(-EINVAL); 167 168 memset(&fid, 0, sizeof(struct fid)); 169 fid.ino = handle.ha_fid.fid_ino; 170 fid.gen = handle.ha_fid.fid_gen; 171 172 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 173 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 174 xfs_handle_acceptable, NULL); 175 } 176 177 STATIC struct dentry * 178 xfs_handlereq_to_dentry( 179 struct file *parfilp, 180 xfs_fsop_handlereq_t *hreq) 181 { 182 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 183 } 184 185 int 186 xfs_open_by_handle( 187 struct file *parfilp, 188 xfs_fsop_handlereq_t *hreq) 189 { 190 const struct cred *cred = current_cred(); 191 int error; 192 int fd; 193 int permflag; 194 struct file *filp; 195 struct inode *inode; 196 struct dentry *dentry; 197 fmode_t fmode; 198 struct path path; 199 200 if (!capable(CAP_SYS_ADMIN)) 201 return -EPERM; 202 203 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 204 if (IS_ERR(dentry)) 205 return PTR_ERR(dentry); 206 inode = d_inode(dentry); 207 208 /* Restrict xfs_open_by_handle to directories & regular files. */ 209 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 210 error = -EPERM; 211 goto out_dput; 212 } 213 214 #if BITS_PER_LONG != 32 215 hreq->oflags |= O_LARGEFILE; 216 #endif 217 218 permflag = hreq->oflags; 219 fmode = OPEN_FMODE(permflag); 220 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 221 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 222 error = -EPERM; 223 goto out_dput; 224 } 225 226 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 227 error = -EPERM; 228 goto out_dput; 229 } 230 231 /* Can't write directories. */ 232 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 233 error = -EISDIR; 234 goto out_dput; 235 } 236 237 fd = get_unused_fd_flags(0); 238 if (fd < 0) { 239 error = fd; 240 goto out_dput; 241 } 242 243 path.mnt = parfilp->f_path.mnt; 244 path.dentry = dentry; 245 filp = dentry_open(&path, hreq->oflags, cred); 246 dput(dentry); 247 if (IS_ERR(filp)) { 248 put_unused_fd(fd); 249 return PTR_ERR(filp); 250 } 251 252 if (S_ISREG(inode->i_mode)) { 253 filp->f_flags |= O_NOATIME; 254 filp->f_mode |= FMODE_NOCMTIME; 255 } 256 257 fd_install(fd, filp); 258 return fd; 259 260 out_dput: 261 dput(dentry); 262 return error; 263 } 264 265 int 266 xfs_readlink_by_handle( 267 struct file *parfilp, 268 xfs_fsop_handlereq_t *hreq) 269 { 270 struct dentry *dentry; 271 __u32 olen; 272 int error; 273 274 if (!capable(CAP_SYS_ADMIN)) 275 return -EPERM; 276 277 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 278 if (IS_ERR(dentry)) 279 return PTR_ERR(dentry); 280 281 /* Restrict this handle operation to symlinks only. */ 282 if (!d_is_symlink(dentry)) { 283 error = -EINVAL; 284 goto out_dput; 285 } 286 287 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 288 error = -EFAULT; 289 goto out_dput; 290 } 291 292 error = vfs_readlink(dentry, hreq->ohandle, olen); 293 294 out_dput: 295 dput(dentry); 296 return error; 297 } 298 299 int 300 xfs_set_dmattrs( 301 xfs_inode_t *ip, 302 uint evmask, 303 uint16_t state) 304 { 305 xfs_mount_t *mp = ip->i_mount; 306 xfs_trans_t *tp; 307 int error; 308 309 if (!capable(CAP_SYS_ADMIN)) 310 return -EPERM; 311 312 if (XFS_FORCED_SHUTDOWN(mp)) 313 return -EIO; 314 315 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 316 if (error) 317 return error; 318 319 xfs_ilock(ip, XFS_ILOCK_EXCL); 320 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 321 322 ip->i_d.di_dmevmask = evmask; 323 ip->i_d.di_dmstate = state; 324 325 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 326 error = xfs_trans_commit(tp); 327 328 return error; 329 } 330 331 STATIC int 332 xfs_fssetdm_by_handle( 333 struct file *parfilp, 334 void __user *arg) 335 { 336 int error; 337 struct fsdmidata fsd; 338 xfs_fsop_setdm_handlereq_t dmhreq; 339 struct dentry *dentry; 340 341 if (!capable(CAP_MKNOD)) 342 return -EPERM; 343 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) 344 return -EFAULT; 345 346 error = mnt_want_write_file(parfilp); 347 if (error) 348 return error; 349 350 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); 351 if (IS_ERR(dentry)) { 352 mnt_drop_write_file(parfilp); 353 return PTR_ERR(dentry); 354 } 355 356 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) { 357 error = -EPERM; 358 goto out; 359 } 360 361 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { 362 error = -EFAULT; 363 goto out; 364 } 365 366 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask, 367 fsd.fsd_dmstate); 368 369 out: 370 mnt_drop_write_file(parfilp); 371 dput(dentry); 372 return error; 373 } 374 375 STATIC int 376 xfs_attrlist_by_handle( 377 struct file *parfilp, 378 void __user *arg) 379 { 380 int error = -ENOMEM; 381 attrlist_cursor_kern_t *cursor; 382 struct xfs_fsop_attrlist_handlereq __user *p = arg; 383 xfs_fsop_attrlist_handlereq_t al_hreq; 384 struct dentry *dentry; 385 char *kbuf; 386 387 if (!capable(CAP_SYS_ADMIN)) 388 return -EPERM; 389 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 390 return -EFAULT; 391 if (al_hreq.buflen < sizeof(struct attrlist) || 392 al_hreq.buflen > XFS_XATTR_LIST_MAX) 393 return -EINVAL; 394 395 /* 396 * Reject flags, only allow namespaces. 397 */ 398 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 399 return -EINVAL; 400 401 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 402 if (IS_ERR(dentry)) 403 return PTR_ERR(dentry); 404 405 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); 406 if (!kbuf) 407 goto out_dput; 408 409 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 410 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen, 411 al_hreq.flags, cursor); 412 if (error) 413 goto out_kfree; 414 415 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) { 416 error = -EFAULT; 417 goto out_kfree; 418 } 419 420 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 421 error = -EFAULT; 422 423 out_kfree: 424 kmem_free(kbuf); 425 out_dput: 426 dput(dentry); 427 return error; 428 } 429 430 int 431 xfs_attrmulti_attr_get( 432 struct inode *inode, 433 unsigned char *name, 434 unsigned char __user *ubuf, 435 uint32_t *len, 436 uint32_t flags) 437 { 438 unsigned char *kbuf; 439 int error = -EFAULT; 440 441 if (*len > XFS_XATTR_SIZE_MAX) 442 return -EINVAL; 443 kbuf = kmem_zalloc_large(*len, KM_SLEEP); 444 if (!kbuf) 445 return -ENOMEM; 446 447 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); 448 if (error) 449 goto out_kfree; 450 451 if (copy_to_user(ubuf, kbuf, *len)) 452 error = -EFAULT; 453 454 out_kfree: 455 kmem_free(kbuf); 456 return error; 457 } 458 459 int 460 xfs_attrmulti_attr_set( 461 struct inode *inode, 462 unsigned char *name, 463 const unsigned char __user *ubuf, 464 uint32_t len, 465 uint32_t flags) 466 { 467 unsigned char *kbuf; 468 int error; 469 470 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 471 return -EPERM; 472 if (len > XFS_XATTR_SIZE_MAX) 473 return -EINVAL; 474 475 kbuf = memdup_user(ubuf, len); 476 if (IS_ERR(kbuf)) 477 return PTR_ERR(kbuf); 478 479 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 480 if (!error) 481 xfs_forget_acl(inode, name, flags); 482 kfree(kbuf); 483 return error; 484 } 485 486 int 487 xfs_attrmulti_attr_remove( 488 struct inode *inode, 489 unsigned char *name, 490 uint32_t flags) 491 { 492 int error; 493 494 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 495 return -EPERM; 496 error = xfs_attr_remove(XFS_I(inode), name, flags); 497 if (!error) 498 xfs_forget_acl(inode, name, flags); 499 return error; 500 } 501 502 STATIC int 503 xfs_attrmulti_by_handle( 504 struct file *parfilp, 505 void __user *arg) 506 { 507 int error; 508 xfs_attr_multiop_t *ops; 509 xfs_fsop_attrmulti_handlereq_t am_hreq; 510 struct dentry *dentry; 511 unsigned int i, size; 512 unsigned char *attr_name; 513 514 if (!capable(CAP_SYS_ADMIN)) 515 return -EPERM; 516 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 517 return -EFAULT; 518 519 /* overflow check */ 520 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 521 return -E2BIG; 522 523 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 524 if (IS_ERR(dentry)) 525 return PTR_ERR(dentry); 526 527 error = -E2BIG; 528 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 529 if (!size || size > 16 * PAGE_SIZE) 530 goto out_dput; 531 532 ops = memdup_user(am_hreq.ops, size); 533 if (IS_ERR(ops)) { 534 error = PTR_ERR(ops); 535 goto out_dput; 536 } 537 538 error = -ENOMEM; 539 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 540 if (!attr_name) 541 goto out_kfree_ops; 542 543 error = 0; 544 for (i = 0; i < am_hreq.opcount; i++) { 545 ops[i].am_error = strncpy_from_user((char *)attr_name, 546 ops[i].am_attrname, MAXNAMELEN); 547 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 548 error = -ERANGE; 549 if (ops[i].am_error < 0) 550 break; 551 552 switch (ops[i].am_opcode) { 553 case ATTR_OP_GET: 554 ops[i].am_error = xfs_attrmulti_attr_get( 555 d_inode(dentry), attr_name, 556 ops[i].am_attrvalue, &ops[i].am_length, 557 ops[i].am_flags); 558 break; 559 case ATTR_OP_SET: 560 ops[i].am_error = mnt_want_write_file(parfilp); 561 if (ops[i].am_error) 562 break; 563 ops[i].am_error = xfs_attrmulti_attr_set( 564 d_inode(dentry), attr_name, 565 ops[i].am_attrvalue, ops[i].am_length, 566 ops[i].am_flags); 567 mnt_drop_write_file(parfilp); 568 break; 569 case ATTR_OP_REMOVE: 570 ops[i].am_error = mnt_want_write_file(parfilp); 571 if (ops[i].am_error) 572 break; 573 ops[i].am_error = xfs_attrmulti_attr_remove( 574 d_inode(dentry), attr_name, 575 ops[i].am_flags); 576 mnt_drop_write_file(parfilp); 577 break; 578 default: 579 ops[i].am_error = -EINVAL; 580 } 581 } 582 583 if (copy_to_user(am_hreq.ops, ops, size)) 584 error = -EFAULT; 585 586 kfree(attr_name); 587 out_kfree_ops: 588 kfree(ops); 589 out_dput: 590 dput(dentry); 591 return error; 592 } 593 594 int 595 xfs_ioc_space( 596 struct file *filp, 597 unsigned int cmd, 598 xfs_flock64_t *bf) 599 { 600 struct inode *inode = file_inode(filp); 601 struct xfs_inode *ip = XFS_I(inode); 602 struct iattr iattr; 603 enum xfs_prealloc_flags flags = 0; 604 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; 605 int error; 606 607 /* 608 * Only allow the sys admin to reserve space unless 609 * unwritten extents are enabled. 610 */ 611 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && 612 !capable(CAP_SYS_ADMIN)) 613 return -EPERM; 614 615 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 616 return -EPERM; 617 618 if (!(filp->f_mode & FMODE_WRITE)) 619 return -EBADF; 620 621 if (!S_ISREG(inode->i_mode)) 622 return -EINVAL; 623 624 if (filp->f_flags & O_DSYNC) 625 flags |= XFS_PREALLOC_SYNC; 626 if (filp->f_mode & FMODE_NOCMTIME) 627 flags |= XFS_PREALLOC_INVISIBLE; 628 629 error = mnt_want_write_file(filp); 630 if (error) 631 return error; 632 633 xfs_ilock(ip, iolock); 634 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); 635 if (error) 636 goto out_unlock; 637 638 switch (bf->l_whence) { 639 case 0: /*SEEK_SET*/ 640 break; 641 case 1: /*SEEK_CUR*/ 642 bf->l_start += filp->f_pos; 643 break; 644 case 2: /*SEEK_END*/ 645 bf->l_start += XFS_ISIZE(ip); 646 break; 647 default: 648 error = -EINVAL; 649 goto out_unlock; 650 } 651 652 /* 653 * length of <= 0 for resv/unresv/zero is invalid. length for 654 * alloc/free is ignored completely and we have no idea what userspace 655 * might have set it to, so set it to zero to allow range 656 * checks to pass. 657 */ 658 switch (cmd) { 659 case XFS_IOC_ZERO_RANGE: 660 case XFS_IOC_RESVSP: 661 case XFS_IOC_RESVSP64: 662 case XFS_IOC_UNRESVSP: 663 case XFS_IOC_UNRESVSP64: 664 if (bf->l_len <= 0) { 665 error = -EINVAL; 666 goto out_unlock; 667 } 668 break; 669 default: 670 bf->l_len = 0; 671 break; 672 } 673 674 if (bf->l_start < 0 || 675 bf->l_start > inode->i_sb->s_maxbytes || 676 bf->l_start + bf->l_len < 0 || 677 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) { 678 error = -EINVAL; 679 goto out_unlock; 680 } 681 682 switch (cmd) { 683 case XFS_IOC_ZERO_RANGE: 684 flags |= XFS_PREALLOC_SET; 685 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); 686 break; 687 case XFS_IOC_RESVSP: 688 case XFS_IOC_RESVSP64: 689 flags |= XFS_PREALLOC_SET; 690 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, 691 XFS_BMAPI_PREALLOC); 692 break; 693 case XFS_IOC_UNRESVSP: 694 case XFS_IOC_UNRESVSP64: 695 error = xfs_free_file_space(ip, bf->l_start, bf->l_len); 696 break; 697 case XFS_IOC_ALLOCSP: 698 case XFS_IOC_ALLOCSP64: 699 case XFS_IOC_FREESP: 700 case XFS_IOC_FREESP64: 701 flags |= XFS_PREALLOC_CLEAR; 702 if (bf->l_start > XFS_ISIZE(ip)) { 703 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 704 bf->l_start - XFS_ISIZE(ip), 0); 705 if (error) 706 goto out_unlock; 707 } 708 709 iattr.ia_valid = ATTR_SIZE; 710 iattr.ia_size = bf->l_start; 711 712 error = xfs_vn_setattr_size(file_dentry(filp), &iattr); 713 break; 714 default: 715 ASSERT(0); 716 error = -EINVAL; 717 } 718 719 if (error) 720 goto out_unlock; 721 722 error = xfs_update_prealloc_flags(ip, flags); 723 724 out_unlock: 725 xfs_iunlock(ip, iolock); 726 mnt_drop_write_file(filp); 727 return error; 728 } 729 730 STATIC int 731 xfs_ioc_bulkstat( 732 xfs_mount_t *mp, 733 unsigned int cmd, 734 void __user *arg) 735 { 736 xfs_fsop_bulkreq_t bulkreq; 737 int count; /* # of records returned */ 738 xfs_ino_t inlast; /* last inode number */ 739 int done; 740 int error; 741 742 /* done = 1 if there are more stats to get and if bulkstat */ 743 /* should be called again (unused here, but used in dmapi) */ 744 745 if (!capable(CAP_SYS_ADMIN)) 746 return -EPERM; 747 748 if (XFS_FORCED_SHUTDOWN(mp)) 749 return -EIO; 750 751 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) 752 return -EFAULT; 753 754 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) 755 return -EFAULT; 756 757 if ((count = bulkreq.icount) <= 0) 758 return -EINVAL; 759 760 if (bulkreq.ubuffer == NULL) 761 return -EINVAL; 762 763 if (cmd == XFS_IOC_FSINUMBERS) 764 error = xfs_inumbers(mp, &inlast, &count, 765 bulkreq.ubuffer, xfs_inumbers_fmt); 766 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) 767 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer, 768 sizeof(xfs_bstat_t), NULL, &done); 769 else /* XFS_IOC_FSBULKSTAT */ 770 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, 771 sizeof(xfs_bstat_t), bulkreq.ubuffer, 772 &done); 773 774 if (error) 775 return error; 776 777 if (bulkreq.ocount != NULL) { 778 if (copy_to_user(bulkreq.lastip, &inlast, 779 sizeof(xfs_ino_t))) 780 return -EFAULT; 781 782 if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) 783 return -EFAULT; 784 } 785 786 return 0; 787 } 788 789 STATIC int 790 xfs_ioc_fsgeometry_v1( 791 xfs_mount_t *mp, 792 void __user *arg) 793 { 794 xfs_fsop_geom_t fsgeo; 795 int error; 796 797 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 3); 798 if (error) 799 return error; 800 801 /* 802 * Caller should have passed an argument of type 803 * xfs_fsop_geom_v1_t. This is a proper subset of the 804 * xfs_fsop_geom_t that xfs_fs_geometry() fills in. 805 */ 806 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) 807 return -EFAULT; 808 return 0; 809 } 810 811 STATIC int 812 xfs_ioc_fsgeometry( 813 xfs_mount_t *mp, 814 void __user *arg) 815 { 816 xfs_fsop_geom_t fsgeo; 817 int error; 818 819 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 4); 820 if (error) 821 return error; 822 823 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) 824 return -EFAULT; 825 return 0; 826 } 827 828 /* 829 * Linux extended inode flags interface. 830 */ 831 832 STATIC unsigned int 833 xfs_merge_ioc_xflags( 834 unsigned int flags, 835 unsigned int start) 836 { 837 unsigned int xflags = start; 838 839 if (flags & FS_IMMUTABLE_FL) 840 xflags |= FS_XFLAG_IMMUTABLE; 841 else 842 xflags &= ~FS_XFLAG_IMMUTABLE; 843 if (flags & FS_APPEND_FL) 844 xflags |= FS_XFLAG_APPEND; 845 else 846 xflags &= ~FS_XFLAG_APPEND; 847 if (flags & FS_SYNC_FL) 848 xflags |= FS_XFLAG_SYNC; 849 else 850 xflags &= ~FS_XFLAG_SYNC; 851 if (flags & FS_NOATIME_FL) 852 xflags |= FS_XFLAG_NOATIME; 853 else 854 xflags &= ~FS_XFLAG_NOATIME; 855 if (flags & FS_NODUMP_FL) 856 xflags |= FS_XFLAG_NODUMP; 857 else 858 xflags &= ~FS_XFLAG_NODUMP; 859 860 return xflags; 861 } 862 863 STATIC unsigned int 864 xfs_di2lxflags( 865 uint16_t di_flags) 866 { 867 unsigned int flags = 0; 868 869 if (di_flags & XFS_DIFLAG_IMMUTABLE) 870 flags |= FS_IMMUTABLE_FL; 871 if (di_flags & XFS_DIFLAG_APPEND) 872 flags |= FS_APPEND_FL; 873 if (di_flags & XFS_DIFLAG_SYNC) 874 flags |= FS_SYNC_FL; 875 if (di_flags & XFS_DIFLAG_NOATIME) 876 flags |= FS_NOATIME_FL; 877 if (di_flags & XFS_DIFLAG_NODUMP) 878 flags |= FS_NODUMP_FL; 879 return flags; 880 } 881 882 STATIC int 883 xfs_ioc_fsgetxattr( 884 xfs_inode_t *ip, 885 int attr, 886 void __user *arg) 887 { 888 struct fsxattr fa; 889 890 memset(&fa, 0, sizeof(struct fsxattr)); 891 892 xfs_ilock(ip, XFS_ILOCK_SHARED); 893 fa.fsx_xflags = xfs_ip2xflags(ip); 894 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 895 fa.fsx_cowextsize = ip->i_d.di_cowextsize << 896 ip->i_mount->m_sb.sb_blocklog; 897 fa.fsx_projid = xfs_get_projid(ip); 898 899 if (attr) { 900 if (ip->i_afp) { 901 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 902 fa.fsx_nextents = xfs_iext_count(ip->i_afp); 903 else 904 fa.fsx_nextents = ip->i_d.di_anextents; 905 } else 906 fa.fsx_nextents = 0; 907 } else { 908 if (ip->i_df.if_flags & XFS_IFEXTENTS) 909 fa.fsx_nextents = xfs_iext_count(&ip->i_df); 910 else 911 fa.fsx_nextents = ip->i_d.di_nextents; 912 } 913 xfs_iunlock(ip, XFS_ILOCK_SHARED); 914 915 if (copy_to_user(arg, &fa, sizeof(fa))) 916 return -EFAULT; 917 return 0; 918 } 919 920 STATIC uint16_t 921 xfs_flags2diflags( 922 struct xfs_inode *ip, 923 unsigned int xflags) 924 { 925 /* can't set PREALLOC this way, just preserve it */ 926 uint16_t di_flags = 927 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 928 929 if (xflags & FS_XFLAG_IMMUTABLE) 930 di_flags |= XFS_DIFLAG_IMMUTABLE; 931 if (xflags & FS_XFLAG_APPEND) 932 di_flags |= XFS_DIFLAG_APPEND; 933 if (xflags & FS_XFLAG_SYNC) 934 di_flags |= XFS_DIFLAG_SYNC; 935 if (xflags & FS_XFLAG_NOATIME) 936 di_flags |= XFS_DIFLAG_NOATIME; 937 if (xflags & FS_XFLAG_NODUMP) 938 di_flags |= XFS_DIFLAG_NODUMP; 939 if (xflags & FS_XFLAG_NODEFRAG) 940 di_flags |= XFS_DIFLAG_NODEFRAG; 941 if (xflags & FS_XFLAG_FILESTREAM) 942 di_flags |= XFS_DIFLAG_FILESTREAM; 943 if (S_ISDIR(VFS_I(ip)->i_mode)) { 944 if (xflags & FS_XFLAG_RTINHERIT) 945 di_flags |= XFS_DIFLAG_RTINHERIT; 946 if (xflags & FS_XFLAG_NOSYMLINKS) 947 di_flags |= XFS_DIFLAG_NOSYMLINKS; 948 if (xflags & FS_XFLAG_EXTSZINHERIT) 949 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 950 if (xflags & FS_XFLAG_PROJINHERIT) 951 di_flags |= XFS_DIFLAG_PROJINHERIT; 952 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 953 if (xflags & FS_XFLAG_REALTIME) 954 di_flags |= XFS_DIFLAG_REALTIME; 955 if (xflags & FS_XFLAG_EXTSIZE) 956 di_flags |= XFS_DIFLAG_EXTSIZE; 957 } 958 959 return di_flags; 960 } 961 962 STATIC uint64_t 963 xfs_flags2diflags2( 964 struct xfs_inode *ip, 965 unsigned int xflags) 966 { 967 uint64_t di_flags2 = 968 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK); 969 970 if (xflags & FS_XFLAG_DAX) 971 di_flags2 |= XFS_DIFLAG2_DAX; 972 if (xflags & FS_XFLAG_COWEXTSIZE) 973 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 974 975 return di_flags2; 976 } 977 978 STATIC void 979 xfs_diflags_to_linux( 980 struct xfs_inode *ip) 981 { 982 struct inode *inode = VFS_I(ip); 983 unsigned int xflags = xfs_ip2xflags(ip); 984 985 if (xflags & FS_XFLAG_IMMUTABLE) 986 inode->i_flags |= S_IMMUTABLE; 987 else 988 inode->i_flags &= ~S_IMMUTABLE; 989 if (xflags & FS_XFLAG_APPEND) 990 inode->i_flags |= S_APPEND; 991 else 992 inode->i_flags &= ~S_APPEND; 993 if (xflags & FS_XFLAG_SYNC) 994 inode->i_flags |= S_SYNC; 995 else 996 inode->i_flags &= ~S_SYNC; 997 if (xflags & FS_XFLAG_NOATIME) 998 inode->i_flags |= S_NOATIME; 999 else 1000 inode->i_flags &= ~S_NOATIME; 1001 #if 0 /* disabled until the flag switching races are sorted out */ 1002 if (xflags & FS_XFLAG_DAX) 1003 inode->i_flags |= S_DAX; 1004 else 1005 inode->i_flags &= ~S_DAX; 1006 #endif 1007 } 1008 1009 static int 1010 xfs_ioctl_setattr_xflags( 1011 struct xfs_trans *tp, 1012 struct xfs_inode *ip, 1013 struct fsxattr *fa) 1014 { 1015 struct xfs_mount *mp = ip->i_mount; 1016 uint64_t di_flags2; 1017 1018 /* Can't change realtime flag if any extents are allocated. */ 1019 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1020 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1021 return -EINVAL; 1022 1023 /* If realtime flag is set then must have realtime device */ 1024 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1025 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1026 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1027 return -EINVAL; 1028 } 1029 1030 /* Clear reflink if we are actually able to set the rt flag. */ 1031 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1032 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; 1033 1034 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1035 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1036 return -EINVAL; 1037 1038 /* 1039 * Can't modify an immutable/append-only file unless 1040 * we have appropriate permission. 1041 */ 1042 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) || 1043 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) && 1044 !capable(CAP_LINUX_IMMUTABLE)) 1045 return -EPERM; 1046 1047 /* diflags2 only valid for v3 inodes. */ 1048 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1049 if (di_flags2 && ip->i_d.di_version < 3) 1050 return -EINVAL; 1051 1052 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags); 1053 ip->i_d.di_flags2 = di_flags2; 1054 1055 xfs_diflags_to_linux(ip); 1056 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1057 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1058 XFS_STATS_INC(mp, xs_ig_attrchg); 1059 return 0; 1060 } 1061 1062 /* 1063 * If we are changing DAX flags, we have to ensure the file is clean and any 1064 * cached objects in the address space are invalidated and removed. This 1065 * requires us to lock out other IO and page faults similar to a truncate 1066 * operation. The locks need to be held until the transaction has been committed 1067 * so that the cache invalidation is atomic with respect to the DAX flag 1068 * manipulation. 1069 */ 1070 static int 1071 xfs_ioctl_setattr_dax_invalidate( 1072 struct xfs_inode *ip, 1073 struct fsxattr *fa, 1074 int *join_flags) 1075 { 1076 struct inode *inode = VFS_I(ip); 1077 struct super_block *sb = inode->i_sb; 1078 int error; 1079 1080 *join_flags = 0; 1081 1082 /* 1083 * It is only valid to set the DAX flag on regular files and 1084 * directories on filesystems where the block size is equal to the page 1085 * size. On directories it serves as an inherited hint so we don't 1086 * have to check the device for dax support or flush pagecache. 1087 */ 1088 if (fa->fsx_xflags & FS_XFLAG_DAX) { 1089 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) 1090 return -EINVAL; 1091 if (S_ISREG(inode->i_mode) && 1092 !bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)), 1093 sb->s_blocksize)) 1094 return -EINVAL; 1095 } 1096 1097 /* If the DAX state is not changing, we have nothing to do here. */ 1098 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode)) 1099 return 0; 1100 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode)) 1101 return 0; 1102 1103 if (S_ISDIR(inode->i_mode)) 1104 return 0; 1105 1106 /* lock, flush and invalidate mapping in preparation for flag change */ 1107 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1108 error = filemap_write_and_wait(inode->i_mapping); 1109 if (error) 1110 goto out_unlock; 1111 error = invalidate_inode_pages2(inode->i_mapping); 1112 if (error) 1113 goto out_unlock; 1114 1115 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL; 1116 return 0; 1117 1118 out_unlock: 1119 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1120 return error; 1121 1122 } 1123 1124 /* 1125 * Set up the transaction structure for the setattr operation, checking that we 1126 * have permission to do so. On success, return a clean transaction and the 1127 * inode locked exclusively ready for further operation specific checks. On 1128 * failure, return an error without modifying or locking the inode. 1129 * 1130 * The inode might already be IO locked on call. If this is the case, it is 1131 * indicated in @join_flags and we take full responsibility for ensuring they 1132 * are unlocked from now on. Hence if we have an error here, we still have to 1133 * unlock them. Otherwise, once they are joined to the transaction, they will 1134 * be unlocked on commit/cancel. 1135 */ 1136 static struct xfs_trans * 1137 xfs_ioctl_setattr_get_trans( 1138 struct xfs_inode *ip, 1139 int join_flags) 1140 { 1141 struct xfs_mount *mp = ip->i_mount; 1142 struct xfs_trans *tp; 1143 int error = -EROFS; 1144 1145 if (mp->m_flags & XFS_MOUNT_RDONLY) 1146 goto out_unlock; 1147 error = -EIO; 1148 if (XFS_FORCED_SHUTDOWN(mp)) 1149 goto out_unlock; 1150 1151 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1152 if (error) 1153 return ERR_PTR(error); 1154 1155 xfs_ilock(ip, XFS_ILOCK_EXCL); 1156 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags); 1157 join_flags = 0; 1158 1159 /* 1160 * CAP_FOWNER overrides the following restrictions: 1161 * 1162 * The user ID of the calling process must be equal to the file owner 1163 * ID, except in cases where the CAP_FSETID capability is applicable. 1164 */ 1165 if (!inode_owner_or_capable(VFS_I(ip))) { 1166 error = -EPERM; 1167 goto out_cancel; 1168 } 1169 1170 if (mp->m_flags & XFS_MOUNT_WSYNC) 1171 xfs_trans_set_sync(tp); 1172 1173 return tp; 1174 1175 out_cancel: 1176 xfs_trans_cancel(tp); 1177 out_unlock: 1178 if (join_flags) 1179 xfs_iunlock(ip, join_flags); 1180 return ERR_PTR(error); 1181 } 1182 1183 /* 1184 * extent size hint validation is somewhat cumbersome. Rules are: 1185 * 1186 * 1. extent size hint is only valid for directories and regular files 1187 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1188 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1189 * 4. can only be changed on regular files if no extents are allocated 1190 * 5. can be changed on directories at any time 1191 * 6. extsize hint of 0 turns off hints, clears inode flags. 1192 * 7. Extent size must be a multiple of the appropriate block size. 1193 * 8. for non-realtime files, the extent size hint must be limited 1194 * to half the AG size to avoid alignment extending the extent beyond the 1195 * limits of the AG. 1196 * 1197 * Please keep this function in sync with xfs_scrub_inode_extsize. 1198 */ 1199 static int 1200 xfs_ioctl_setattr_check_extsize( 1201 struct xfs_inode *ip, 1202 struct fsxattr *fa) 1203 { 1204 struct xfs_mount *mp = ip->i_mount; 1205 1206 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode)) 1207 return -EINVAL; 1208 1209 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) && 1210 !S_ISDIR(VFS_I(ip)->i_mode)) 1211 return -EINVAL; 1212 1213 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents && 1214 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1215 return -EINVAL; 1216 1217 if (fa->fsx_extsize != 0) { 1218 xfs_extlen_t size; 1219 xfs_fsblock_t extsize_fsb; 1220 1221 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1222 if (extsize_fsb > MAXEXTLEN) 1223 return -EINVAL; 1224 1225 if (XFS_IS_REALTIME_INODE(ip) || 1226 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1227 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1228 } else { 1229 size = mp->m_sb.sb_blocksize; 1230 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1231 return -EINVAL; 1232 } 1233 1234 if (fa->fsx_extsize % size) 1235 return -EINVAL; 1236 } else 1237 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT); 1238 1239 return 0; 1240 } 1241 1242 /* 1243 * CoW extent size hint validation rules are: 1244 * 1245 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1246 * The inode does not have to have any shared blocks, but it must be a v3. 1247 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1248 * for a directory, the hint is propagated to new files. 1249 * 3. Can be changed on files & directories at any time. 1250 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1251 * 5. Extent size must be a multiple of the appropriate block size. 1252 * 6. The extent size hint must be limited to half the AG size to avoid 1253 * alignment extending the extent beyond the limits of the AG. 1254 * 1255 * Please keep this function in sync with xfs_scrub_inode_cowextsize. 1256 */ 1257 static int 1258 xfs_ioctl_setattr_check_cowextsize( 1259 struct xfs_inode *ip, 1260 struct fsxattr *fa) 1261 { 1262 struct xfs_mount *mp = ip->i_mount; 1263 1264 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1265 return 0; 1266 1267 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) || 1268 ip->i_d.di_version != 3) 1269 return -EINVAL; 1270 1271 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode)) 1272 return -EINVAL; 1273 1274 if (fa->fsx_cowextsize != 0) { 1275 xfs_extlen_t size; 1276 xfs_fsblock_t cowextsize_fsb; 1277 1278 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1279 if (cowextsize_fsb > MAXEXTLEN) 1280 return -EINVAL; 1281 1282 size = mp->m_sb.sb_blocksize; 1283 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1284 return -EINVAL; 1285 1286 if (fa->fsx_cowextsize % size) 1287 return -EINVAL; 1288 } else 1289 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE; 1290 1291 return 0; 1292 } 1293 1294 static int 1295 xfs_ioctl_setattr_check_projid( 1296 struct xfs_inode *ip, 1297 struct fsxattr *fa) 1298 { 1299 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1300 if (fa->fsx_projid > (uint16_t)-1 && 1301 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1302 return -EINVAL; 1303 1304 /* 1305 * Project Quota ID state is only allowed to change from within the init 1306 * namespace. Enforce that restriction only if we are trying to change 1307 * the quota ID state. Everything else is allowed in user namespaces. 1308 */ 1309 if (current_user_ns() == &init_user_ns) 1310 return 0; 1311 1312 if (xfs_get_projid(ip) != fa->fsx_projid) 1313 return -EINVAL; 1314 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) != 1315 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)) 1316 return -EINVAL; 1317 1318 return 0; 1319 } 1320 1321 STATIC int 1322 xfs_ioctl_setattr( 1323 xfs_inode_t *ip, 1324 struct fsxattr *fa) 1325 { 1326 struct xfs_mount *mp = ip->i_mount; 1327 struct xfs_trans *tp; 1328 struct xfs_dquot *udqp = NULL; 1329 struct xfs_dquot *pdqp = NULL; 1330 struct xfs_dquot *olddquot = NULL; 1331 int code; 1332 int join_flags = 0; 1333 1334 trace_xfs_ioctl_setattr(ip); 1335 1336 code = xfs_ioctl_setattr_check_projid(ip, fa); 1337 if (code) 1338 return code; 1339 1340 /* 1341 * If disk quotas is on, we make sure that the dquots do exist on disk, 1342 * before we start any other transactions. Trying to do this later 1343 * is messy. We don't care to take a readlock to look at the ids 1344 * in inode here, because we can't hold it across the trans_reserve. 1345 * If the IDs do change before we take the ilock, we're covered 1346 * because the i_*dquot fields will get updated anyway. 1347 */ 1348 if (XFS_IS_QUOTA_ON(mp)) { 1349 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1350 ip->i_d.di_gid, fa->fsx_projid, 1351 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1352 if (code) 1353 return code; 1354 } 1355 1356 /* 1357 * Changing DAX config may require inode locking for mapping 1358 * invalidation. These need to be held all the way to transaction commit 1359 * or cancel time, so need to be passed through to 1360 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1361 * appropriately. 1362 */ 1363 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags); 1364 if (code) 1365 goto error_free_dquots; 1366 1367 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1368 if (IS_ERR(tp)) { 1369 code = PTR_ERR(tp); 1370 goto error_free_dquots; 1371 } 1372 1373 1374 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1375 xfs_get_projid(ip) != fa->fsx_projid) { 1376 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1377 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1378 if (code) /* out of quota */ 1379 goto error_trans_cancel; 1380 } 1381 1382 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1383 if (code) 1384 goto error_trans_cancel; 1385 1386 code = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1387 if (code) 1388 goto error_trans_cancel; 1389 1390 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1391 if (code) 1392 goto error_trans_cancel; 1393 1394 /* 1395 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1396 * overrides the following restrictions: 1397 * 1398 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1399 * successful return from chown() 1400 */ 1401 1402 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1403 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1404 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1405 1406 /* Change the ownerships and register project quota modifications */ 1407 if (xfs_get_projid(ip) != fa->fsx_projid) { 1408 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1409 olddquot = xfs_qm_vop_chown(tp, ip, 1410 &ip->i_pdquot, pdqp); 1411 } 1412 ASSERT(ip->i_d.di_version > 1); 1413 xfs_set_projid(ip, fa->fsx_projid); 1414 } 1415 1416 /* 1417 * Only set the extent size hint if we've already determined that the 1418 * extent size hint should be set on the inode. If no extent size flags 1419 * are set on the inode then unconditionally clear the extent size hint. 1420 */ 1421 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1422 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1423 else 1424 ip->i_d.di_extsize = 0; 1425 if (ip->i_d.di_version == 3 && 1426 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) 1427 ip->i_d.di_cowextsize = fa->fsx_cowextsize >> 1428 mp->m_sb.sb_blocklog; 1429 else 1430 ip->i_d.di_cowextsize = 0; 1431 1432 code = xfs_trans_commit(tp); 1433 1434 /* 1435 * Release any dquot(s) the inode had kept before chown. 1436 */ 1437 xfs_qm_dqrele(olddquot); 1438 xfs_qm_dqrele(udqp); 1439 xfs_qm_dqrele(pdqp); 1440 1441 return code; 1442 1443 error_trans_cancel: 1444 xfs_trans_cancel(tp); 1445 error_free_dquots: 1446 xfs_qm_dqrele(udqp); 1447 xfs_qm_dqrele(pdqp); 1448 return code; 1449 } 1450 1451 STATIC int 1452 xfs_ioc_fssetxattr( 1453 xfs_inode_t *ip, 1454 struct file *filp, 1455 void __user *arg) 1456 { 1457 struct fsxattr fa; 1458 int error; 1459 1460 if (copy_from_user(&fa, arg, sizeof(fa))) 1461 return -EFAULT; 1462 1463 error = mnt_want_write_file(filp); 1464 if (error) 1465 return error; 1466 error = xfs_ioctl_setattr(ip, &fa); 1467 mnt_drop_write_file(filp); 1468 return error; 1469 } 1470 1471 STATIC int 1472 xfs_ioc_getxflags( 1473 xfs_inode_t *ip, 1474 void __user *arg) 1475 { 1476 unsigned int flags; 1477 1478 flags = xfs_di2lxflags(ip->i_d.di_flags); 1479 if (copy_to_user(arg, &flags, sizeof(flags))) 1480 return -EFAULT; 1481 return 0; 1482 } 1483 1484 STATIC int 1485 xfs_ioc_setxflags( 1486 struct xfs_inode *ip, 1487 struct file *filp, 1488 void __user *arg) 1489 { 1490 struct xfs_trans *tp; 1491 struct fsxattr fa; 1492 unsigned int flags; 1493 int join_flags = 0; 1494 int error; 1495 1496 if (copy_from_user(&flags, arg, sizeof(flags))) 1497 return -EFAULT; 1498 1499 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1500 FS_NOATIME_FL | FS_NODUMP_FL | \ 1501 FS_SYNC_FL)) 1502 return -EOPNOTSUPP; 1503 1504 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1505 1506 error = mnt_want_write_file(filp); 1507 if (error) 1508 return error; 1509 1510 /* 1511 * Changing DAX config may require inode locking for mapping 1512 * invalidation. These need to be held all the way to transaction commit 1513 * or cancel time, so need to be passed through to 1514 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1515 * appropriately. 1516 */ 1517 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags); 1518 if (error) 1519 goto out_drop_write; 1520 1521 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1522 if (IS_ERR(tp)) { 1523 error = PTR_ERR(tp); 1524 goto out_drop_write; 1525 } 1526 1527 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1528 if (error) { 1529 xfs_trans_cancel(tp); 1530 goto out_drop_write; 1531 } 1532 1533 error = xfs_trans_commit(tp); 1534 out_drop_write: 1535 mnt_drop_write_file(filp); 1536 return error; 1537 } 1538 1539 static bool 1540 xfs_getbmap_format( 1541 struct kgetbmap *p, 1542 struct getbmapx __user *u, 1543 size_t recsize) 1544 { 1545 if (put_user(p->bmv_offset, &u->bmv_offset) || 1546 put_user(p->bmv_block, &u->bmv_block) || 1547 put_user(p->bmv_length, &u->bmv_length) || 1548 put_user(0, &u->bmv_count) || 1549 put_user(0, &u->bmv_entries)) 1550 return false; 1551 if (recsize < sizeof(struct getbmapx)) 1552 return true; 1553 if (put_user(0, &u->bmv_iflags) || 1554 put_user(p->bmv_oflags, &u->bmv_oflags) || 1555 put_user(0, &u->bmv_unused1) || 1556 put_user(0, &u->bmv_unused2)) 1557 return false; 1558 return true; 1559 } 1560 1561 STATIC int 1562 xfs_ioc_getbmap( 1563 struct file *file, 1564 unsigned int cmd, 1565 void __user *arg) 1566 { 1567 struct getbmapx bmx = { 0 }; 1568 struct kgetbmap *buf; 1569 size_t recsize; 1570 int error, i; 1571 1572 switch (cmd) { 1573 case XFS_IOC_GETBMAPA: 1574 bmx.bmv_iflags = BMV_IF_ATTRFORK; 1575 /*FALLTHRU*/ 1576 case XFS_IOC_GETBMAP: 1577 if (file->f_mode & FMODE_NOCMTIME) 1578 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1579 /* struct getbmap is a strict subset of struct getbmapx. */ 1580 recsize = sizeof(struct getbmap); 1581 break; 1582 case XFS_IOC_GETBMAPX: 1583 recsize = sizeof(struct getbmapx); 1584 break; 1585 default: 1586 return -EINVAL; 1587 } 1588 1589 if (copy_from_user(&bmx, arg, recsize)) 1590 return -EFAULT; 1591 1592 if (bmx.bmv_count < 2) 1593 return -EINVAL; 1594 if (bmx.bmv_count > ULONG_MAX / recsize) 1595 return -ENOMEM; 1596 1597 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0); 1598 if (!buf) 1599 return -ENOMEM; 1600 1601 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 1602 if (error) 1603 goto out_free_buf; 1604 1605 error = -EFAULT; 1606 if (copy_to_user(arg, &bmx, recsize)) 1607 goto out_free_buf; 1608 arg += recsize; 1609 1610 for (i = 0; i < bmx.bmv_entries; i++) { 1611 if (!xfs_getbmap_format(buf + i, arg, recsize)) 1612 goto out_free_buf; 1613 arg += recsize; 1614 } 1615 1616 error = 0; 1617 out_free_buf: 1618 kmem_free(buf); 1619 return 0; 1620 } 1621 1622 struct getfsmap_info { 1623 struct xfs_mount *mp; 1624 struct fsmap_head __user *data; 1625 unsigned int idx; 1626 __u32 last_flags; 1627 }; 1628 1629 STATIC int 1630 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv) 1631 { 1632 struct getfsmap_info *info = priv; 1633 struct fsmap fm; 1634 1635 trace_xfs_getfsmap_mapping(info->mp, xfm); 1636 1637 info->last_flags = xfm->fmr_flags; 1638 xfs_fsmap_from_internal(&fm, xfm); 1639 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm, 1640 sizeof(struct fsmap))) 1641 return -EFAULT; 1642 1643 return 0; 1644 } 1645 1646 STATIC int 1647 xfs_ioc_getfsmap( 1648 struct xfs_inode *ip, 1649 struct fsmap_head __user *arg) 1650 { 1651 struct getfsmap_info info = { NULL }; 1652 struct xfs_fsmap_head xhead = {0}; 1653 struct fsmap_head head; 1654 bool aborted = false; 1655 int error; 1656 1657 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1658 return -EFAULT; 1659 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1660 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1661 sizeof(head.fmh_keys[0].fmr_reserved)) || 1662 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1663 sizeof(head.fmh_keys[1].fmr_reserved))) 1664 return -EINVAL; 1665 1666 xhead.fmh_iflags = head.fmh_iflags; 1667 xhead.fmh_count = head.fmh_count; 1668 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1669 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1670 1671 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1672 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1673 1674 info.mp = ip->i_mount; 1675 info.data = arg; 1676 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info); 1677 if (error == XFS_BTREE_QUERY_RANGE_ABORT) { 1678 error = 0; 1679 aborted = true; 1680 } else if (error) 1681 return error; 1682 1683 /* If we didn't abort, set the "last" flag in the last fmx */ 1684 if (!aborted && info.idx) { 1685 info.last_flags |= FMR_OF_LAST; 1686 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags, 1687 &info.last_flags, sizeof(info.last_flags))) 1688 return -EFAULT; 1689 } 1690 1691 /* copy back header */ 1692 head.fmh_entries = xhead.fmh_entries; 1693 head.fmh_oflags = xhead.fmh_oflags; 1694 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 1695 return -EFAULT; 1696 1697 return 0; 1698 } 1699 1700 STATIC int 1701 xfs_ioc_scrub_metadata( 1702 struct xfs_inode *ip, 1703 void __user *arg) 1704 { 1705 struct xfs_scrub_metadata scrub; 1706 int error; 1707 1708 if (!capable(CAP_SYS_ADMIN)) 1709 return -EPERM; 1710 1711 if (copy_from_user(&scrub, arg, sizeof(scrub))) 1712 return -EFAULT; 1713 1714 error = xfs_scrub_metadata(ip, &scrub); 1715 if (error) 1716 return error; 1717 1718 if (copy_to_user(arg, &scrub, sizeof(scrub))) 1719 return -EFAULT; 1720 1721 return 0; 1722 } 1723 1724 int 1725 xfs_ioc_swapext( 1726 xfs_swapext_t *sxp) 1727 { 1728 xfs_inode_t *ip, *tip; 1729 struct fd f, tmp; 1730 int error = 0; 1731 1732 /* Pull information for the target fd */ 1733 f = fdget((int)sxp->sx_fdtarget); 1734 if (!f.file) { 1735 error = -EINVAL; 1736 goto out; 1737 } 1738 1739 if (!(f.file->f_mode & FMODE_WRITE) || 1740 !(f.file->f_mode & FMODE_READ) || 1741 (f.file->f_flags & O_APPEND)) { 1742 error = -EBADF; 1743 goto out_put_file; 1744 } 1745 1746 tmp = fdget((int)sxp->sx_fdtmp); 1747 if (!tmp.file) { 1748 error = -EINVAL; 1749 goto out_put_file; 1750 } 1751 1752 if (!(tmp.file->f_mode & FMODE_WRITE) || 1753 !(tmp.file->f_mode & FMODE_READ) || 1754 (tmp.file->f_flags & O_APPEND)) { 1755 error = -EBADF; 1756 goto out_put_tmp_file; 1757 } 1758 1759 if (IS_SWAPFILE(file_inode(f.file)) || 1760 IS_SWAPFILE(file_inode(tmp.file))) { 1761 error = -EINVAL; 1762 goto out_put_tmp_file; 1763 } 1764 1765 /* 1766 * We need to ensure that the fds passed in point to XFS inodes 1767 * before we cast and access them as XFS structures as we have no 1768 * control over what the user passes us here. 1769 */ 1770 if (f.file->f_op != &xfs_file_operations || 1771 tmp.file->f_op != &xfs_file_operations) { 1772 error = -EINVAL; 1773 goto out_put_tmp_file; 1774 } 1775 1776 ip = XFS_I(file_inode(f.file)); 1777 tip = XFS_I(file_inode(tmp.file)); 1778 1779 if (ip->i_mount != tip->i_mount) { 1780 error = -EINVAL; 1781 goto out_put_tmp_file; 1782 } 1783 1784 if (ip->i_ino == tip->i_ino) { 1785 error = -EINVAL; 1786 goto out_put_tmp_file; 1787 } 1788 1789 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1790 error = -EIO; 1791 goto out_put_tmp_file; 1792 } 1793 1794 error = xfs_swap_extents(ip, tip, sxp); 1795 1796 out_put_tmp_file: 1797 fdput(tmp); 1798 out_put_file: 1799 fdput(f); 1800 out: 1801 return error; 1802 } 1803 1804 static int 1805 xfs_ioc_getlabel( 1806 struct xfs_mount *mp, 1807 char __user *user_label) 1808 { 1809 struct xfs_sb *sbp = &mp->m_sb; 1810 char label[XFSLABEL_MAX + 1]; 1811 1812 /* Paranoia */ 1813 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 1814 1815 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 1816 memset(label, 0, sizeof(label)); 1817 spin_lock(&mp->m_sb_lock); 1818 strncpy(label, sbp->sb_fname, XFSLABEL_MAX); 1819 spin_unlock(&mp->m_sb_lock); 1820 1821 if (copy_to_user(user_label, label, sizeof(label))) 1822 return -EFAULT; 1823 return 0; 1824 } 1825 1826 static int 1827 xfs_ioc_setlabel( 1828 struct file *filp, 1829 struct xfs_mount *mp, 1830 char __user *newlabel) 1831 { 1832 struct xfs_sb *sbp = &mp->m_sb; 1833 char label[XFSLABEL_MAX + 1]; 1834 size_t len; 1835 int error; 1836 1837 if (!capable(CAP_SYS_ADMIN)) 1838 return -EPERM; 1839 /* 1840 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 1841 * smaller, at 12 bytes. We copy one more to be sure we find the 1842 * (required) NULL character to test the incoming label length. 1843 * NB: The on disk label doesn't need to be null terminated. 1844 */ 1845 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 1846 return -EFAULT; 1847 len = strnlen(label, XFSLABEL_MAX + 1); 1848 if (len > sizeof(sbp->sb_fname)) 1849 return -EINVAL; 1850 1851 error = mnt_want_write_file(filp); 1852 if (error) 1853 return error; 1854 1855 spin_lock(&mp->m_sb_lock); 1856 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 1857 memcpy(sbp->sb_fname, label, len); 1858 spin_unlock(&mp->m_sb_lock); 1859 1860 /* 1861 * Now we do several things to satisfy userspace. 1862 * In addition to normal logging of the primary superblock, we also 1863 * immediately write these changes to sector zero for the primary, then 1864 * update all backup supers (as xfs_db does for a label change), then 1865 * invalidate the block device page cache. This is so that any prior 1866 * buffered reads from userspace (i.e. from blkid) are invalidated, 1867 * and userspace will see the newly-written label. 1868 */ 1869 error = xfs_sync_sb_buf(mp); 1870 if (error) 1871 goto out; 1872 /* 1873 * growfs also updates backup supers so lock against that. 1874 */ 1875 mutex_lock(&mp->m_growlock); 1876 error = xfs_update_secondary_sbs(mp); 1877 mutex_unlock(&mp->m_growlock); 1878 1879 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 1880 1881 out: 1882 mnt_drop_write_file(filp); 1883 return error; 1884 } 1885 1886 /* 1887 * Note: some of the ioctl's return positive numbers as a 1888 * byte count indicating success, such as readlink_by_handle. 1889 * So we don't "sign flip" like most other routines. This means 1890 * true errors need to be returned as a negative value. 1891 */ 1892 long 1893 xfs_file_ioctl( 1894 struct file *filp, 1895 unsigned int cmd, 1896 unsigned long p) 1897 { 1898 struct inode *inode = file_inode(filp); 1899 struct xfs_inode *ip = XFS_I(inode); 1900 struct xfs_mount *mp = ip->i_mount; 1901 void __user *arg = (void __user *)p; 1902 int error; 1903 1904 trace_xfs_file_ioctl(ip); 1905 1906 switch (cmd) { 1907 case FITRIM: 1908 return xfs_ioc_trim(mp, arg); 1909 case FS_IOC_GETFSLABEL: 1910 return xfs_ioc_getlabel(mp, arg); 1911 case FS_IOC_SETFSLABEL: 1912 return xfs_ioc_setlabel(filp, mp, arg); 1913 case XFS_IOC_ALLOCSP: 1914 case XFS_IOC_FREESP: 1915 case XFS_IOC_RESVSP: 1916 case XFS_IOC_UNRESVSP: 1917 case XFS_IOC_ALLOCSP64: 1918 case XFS_IOC_FREESP64: 1919 case XFS_IOC_RESVSP64: 1920 case XFS_IOC_UNRESVSP64: 1921 case XFS_IOC_ZERO_RANGE: { 1922 xfs_flock64_t bf; 1923 1924 if (copy_from_user(&bf, arg, sizeof(bf))) 1925 return -EFAULT; 1926 return xfs_ioc_space(filp, cmd, &bf); 1927 } 1928 case XFS_IOC_DIOINFO: { 1929 struct dioattr da; 1930 xfs_buftarg_t *target = 1931 XFS_IS_REALTIME_INODE(ip) ? 1932 mp->m_rtdev_targp : mp->m_ddev_targp; 1933 1934 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1935 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1936 1937 if (copy_to_user(arg, &da, sizeof(da))) 1938 return -EFAULT; 1939 return 0; 1940 } 1941 1942 case XFS_IOC_FSBULKSTAT_SINGLE: 1943 case XFS_IOC_FSBULKSTAT: 1944 case XFS_IOC_FSINUMBERS: 1945 return xfs_ioc_bulkstat(mp, cmd, arg); 1946 1947 case XFS_IOC_FSGEOMETRY_V1: 1948 return xfs_ioc_fsgeometry_v1(mp, arg); 1949 1950 case XFS_IOC_FSGEOMETRY: 1951 return xfs_ioc_fsgeometry(mp, arg); 1952 1953 case XFS_IOC_GETVERSION: 1954 return put_user(inode->i_generation, (int __user *)arg); 1955 1956 case XFS_IOC_FSGETXATTR: 1957 return xfs_ioc_fsgetxattr(ip, 0, arg); 1958 case XFS_IOC_FSGETXATTRA: 1959 return xfs_ioc_fsgetxattr(ip, 1, arg); 1960 case XFS_IOC_FSSETXATTR: 1961 return xfs_ioc_fssetxattr(ip, filp, arg); 1962 case XFS_IOC_GETXFLAGS: 1963 return xfs_ioc_getxflags(ip, arg); 1964 case XFS_IOC_SETXFLAGS: 1965 return xfs_ioc_setxflags(ip, filp, arg); 1966 1967 case XFS_IOC_FSSETDM: { 1968 struct fsdmidata dmi; 1969 1970 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1971 return -EFAULT; 1972 1973 error = mnt_want_write_file(filp); 1974 if (error) 1975 return error; 1976 1977 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1978 dmi.fsd_dmstate); 1979 mnt_drop_write_file(filp); 1980 return error; 1981 } 1982 1983 case XFS_IOC_GETBMAP: 1984 case XFS_IOC_GETBMAPA: 1985 case XFS_IOC_GETBMAPX: 1986 return xfs_ioc_getbmap(filp, cmd, arg); 1987 1988 case FS_IOC_GETFSMAP: 1989 return xfs_ioc_getfsmap(ip, arg); 1990 1991 case XFS_IOC_SCRUB_METADATA: 1992 return xfs_ioc_scrub_metadata(ip, arg); 1993 1994 case XFS_IOC_FD_TO_HANDLE: 1995 case XFS_IOC_PATH_TO_HANDLE: 1996 case XFS_IOC_PATH_TO_FSHANDLE: { 1997 xfs_fsop_handlereq_t hreq; 1998 1999 if (copy_from_user(&hreq, arg, sizeof(hreq))) 2000 return -EFAULT; 2001 return xfs_find_handle(cmd, &hreq); 2002 } 2003 case XFS_IOC_OPEN_BY_HANDLE: { 2004 xfs_fsop_handlereq_t hreq; 2005 2006 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2007 return -EFAULT; 2008 return xfs_open_by_handle(filp, &hreq); 2009 } 2010 case XFS_IOC_FSSETDM_BY_HANDLE: 2011 return xfs_fssetdm_by_handle(filp, arg); 2012 2013 case XFS_IOC_READLINK_BY_HANDLE: { 2014 xfs_fsop_handlereq_t hreq; 2015 2016 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2017 return -EFAULT; 2018 return xfs_readlink_by_handle(filp, &hreq); 2019 } 2020 case XFS_IOC_ATTRLIST_BY_HANDLE: 2021 return xfs_attrlist_by_handle(filp, arg); 2022 2023 case XFS_IOC_ATTRMULTI_BY_HANDLE: 2024 return xfs_attrmulti_by_handle(filp, arg); 2025 2026 case XFS_IOC_SWAPEXT: { 2027 struct xfs_swapext sxp; 2028 2029 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 2030 return -EFAULT; 2031 error = mnt_want_write_file(filp); 2032 if (error) 2033 return error; 2034 error = xfs_ioc_swapext(&sxp); 2035 mnt_drop_write_file(filp); 2036 return error; 2037 } 2038 2039 case XFS_IOC_FSCOUNTS: { 2040 xfs_fsop_counts_t out; 2041 2042 error = xfs_fs_counts(mp, &out); 2043 if (error) 2044 return error; 2045 2046 if (copy_to_user(arg, &out, sizeof(out))) 2047 return -EFAULT; 2048 return 0; 2049 } 2050 2051 case XFS_IOC_SET_RESBLKS: { 2052 xfs_fsop_resblks_t inout; 2053 uint64_t in; 2054 2055 if (!capable(CAP_SYS_ADMIN)) 2056 return -EPERM; 2057 2058 if (mp->m_flags & XFS_MOUNT_RDONLY) 2059 return -EROFS; 2060 2061 if (copy_from_user(&inout, arg, sizeof(inout))) 2062 return -EFAULT; 2063 2064 error = mnt_want_write_file(filp); 2065 if (error) 2066 return error; 2067 2068 /* input parameter is passed in resblks field of structure */ 2069 in = inout.resblks; 2070 error = xfs_reserve_blocks(mp, &in, &inout); 2071 mnt_drop_write_file(filp); 2072 if (error) 2073 return error; 2074 2075 if (copy_to_user(arg, &inout, sizeof(inout))) 2076 return -EFAULT; 2077 return 0; 2078 } 2079 2080 case XFS_IOC_GET_RESBLKS: { 2081 xfs_fsop_resblks_t out; 2082 2083 if (!capable(CAP_SYS_ADMIN)) 2084 return -EPERM; 2085 2086 error = xfs_reserve_blocks(mp, NULL, &out); 2087 if (error) 2088 return error; 2089 2090 if (copy_to_user(arg, &out, sizeof(out))) 2091 return -EFAULT; 2092 2093 return 0; 2094 } 2095 2096 case XFS_IOC_FSGROWFSDATA: { 2097 xfs_growfs_data_t in; 2098 2099 if (copy_from_user(&in, arg, sizeof(in))) 2100 return -EFAULT; 2101 2102 error = mnt_want_write_file(filp); 2103 if (error) 2104 return error; 2105 error = xfs_growfs_data(mp, &in); 2106 mnt_drop_write_file(filp); 2107 return error; 2108 } 2109 2110 case XFS_IOC_FSGROWFSLOG: { 2111 xfs_growfs_log_t in; 2112 2113 if (copy_from_user(&in, arg, sizeof(in))) 2114 return -EFAULT; 2115 2116 error = mnt_want_write_file(filp); 2117 if (error) 2118 return error; 2119 error = xfs_growfs_log(mp, &in); 2120 mnt_drop_write_file(filp); 2121 return error; 2122 } 2123 2124 case XFS_IOC_FSGROWFSRT: { 2125 xfs_growfs_rt_t in; 2126 2127 if (copy_from_user(&in, arg, sizeof(in))) 2128 return -EFAULT; 2129 2130 error = mnt_want_write_file(filp); 2131 if (error) 2132 return error; 2133 error = xfs_growfs_rt(mp, &in); 2134 mnt_drop_write_file(filp); 2135 return error; 2136 } 2137 2138 case XFS_IOC_GOINGDOWN: { 2139 uint32_t in; 2140 2141 if (!capable(CAP_SYS_ADMIN)) 2142 return -EPERM; 2143 2144 if (get_user(in, (uint32_t __user *)arg)) 2145 return -EFAULT; 2146 2147 return xfs_fs_goingdown(mp, in); 2148 } 2149 2150 case XFS_IOC_ERROR_INJECTION: { 2151 xfs_error_injection_t in; 2152 2153 if (!capable(CAP_SYS_ADMIN)) 2154 return -EPERM; 2155 2156 if (copy_from_user(&in, arg, sizeof(in))) 2157 return -EFAULT; 2158 2159 return xfs_errortag_add(mp, in.errtag); 2160 } 2161 2162 case XFS_IOC_ERROR_CLEARALL: 2163 if (!capable(CAP_SYS_ADMIN)) 2164 return -EPERM; 2165 2166 return xfs_errortag_clearall(mp); 2167 2168 case XFS_IOC_FREE_EOFBLOCKS: { 2169 struct xfs_fs_eofblocks eofb; 2170 struct xfs_eofblocks keofb; 2171 2172 if (!capable(CAP_SYS_ADMIN)) 2173 return -EPERM; 2174 2175 if (mp->m_flags & XFS_MOUNT_RDONLY) 2176 return -EROFS; 2177 2178 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2179 return -EFAULT; 2180 2181 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 2182 if (error) 2183 return error; 2184 2185 return xfs_icache_free_eofblocks(mp, &keofb); 2186 } 2187 2188 default: 2189 return -ENOTTY; 2190 } 2191 } 2192