1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #include "xfs.h" 19 #include "xfs_fs.h" 20 #include "xfs_log.h" 21 #include "xfs_trans.h" 22 #include "xfs_sb.h" 23 #include "xfs_ag.h" 24 #include "xfs_alloc.h" 25 #include "xfs_mount.h" 26 #include "xfs_bmap_btree.h" 27 #include "xfs_dinode.h" 28 #include "xfs_inode.h" 29 #include "xfs_ioctl.h" 30 #include "xfs_rtalloc.h" 31 #include "xfs_itable.h" 32 #include "xfs_error.h" 33 #include "xfs_attr.h" 34 #include "xfs_bmap.h" 35 #include "xfs_buf_item.h" 36 #include "xfs_utils.h" 37 #include "xfs_dfrag.h" 38 #include "xfs_fsops.h" 39 #include "xfs_vnodeops.h" 40 #include "xfs_discard.h" 41 #include "xfs_quota.h" 42 #include "xfs_inode_item.h" 43 #include "xfs_export.h" 44 #include "xfs_trace.h" 45 46 #include <linux/capability.h> 47 #include <linux/dcache.h> 48 #include <linux/mount.h> 49 #include <linux/namei.h> 50 #include <linux/pagemap.h> 51 #include <linux/slab.h> 52 #include <linux/exportfs.h> 53 54 /* 55 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 56 * a file or fs handle. 57 * 58 * XFS_IOC_PATH_TO_FSHANDLE 59 * returns fs handle for a mount point or path within that mount point 60 * XFS_IOC_FD_TO_HANDLE 61 * returns full handle for a FD opened in user space 62 * XFS_IOC_PATH_TO_HANDLE 63 * returns full handle for a path 64 */ 65 int 66 xfs_find_handle( 67 unsigned int cmd, 68 xfs_fsop_handlereq_t *hreq) 69 { 70 int hsize; 71 xfs_handle_t handle; 72 struct inode *inode; 73 struct fd f = {0}; 74 struct path path; 75 int error; 76 struct xfs_inode *ip; 77 78 if (cmd == XFS_IOC_FD_TO_HANDLE) { 79 f = fdget(hreq->fd); 80 if (!f.file) 81 return -EBADF; 82 inode = f.file->f_path.dentry->d_inode; 83 } else { 84 error = user_lpath((const char __user *)hreq->path, &path); 85 if (error) 86 return error; 87 inode = path.dentry->d_inode; 88 } 89 ip = XFS_I(inode); 90 91 /* 92 * We can only generate handles for inodes residing on a XFS filesystem, 93 * and only for regular files, directories or symbolic links. 94 */ 95 error = -EINVAL; 96 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 97 goto out_put; 98 99 error = -EBADF; 100 if (!S_ISREG(inode->i_mode) && 101 !S_ISDIR(inode->i_mode) && 102 !S_ISLNK(inode->i_mode)) 103 goto out_put; 104 105 106 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 107 108 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 109 /* 110 * This handle only contains an fsid, zero the rest. 111 */ 112 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 113 hsize = sizeof(xfs_fsid_t); 114 } else { 115 int lock_mode; 116 117 lock_mode = xfs_ilock_map_shared(ip); 118 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 119 sizeof(handle.ha_fid.fid_len); 120 handle.ha_fid.fid_pad = 0; 121 handle.ha_fid.fid_gen = ip->i_d.di_gen; 122 handle.ha_fid.fid_ino = ip->i_ino; 123 xfs_iunlock_map_shared(ip, lock_mode); 124 125 hsize = XFS_HSIZE(handle); 126 } 127 128 error = -EFAULT; 129 if (copy_to_user(hreq->ohandle, &handle, hsize) || 130 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 131 goto out_put; 132 133 error = 0; 134 135 out_put: 136 if (cmd == XFS_IOC_FD_TO_HANDLE) 137 fdput(f); 138 else 139 path_put(&path); 140 return error; 141 } 142 143 /* 144 * No need to do permission checks on the various pathname components 145 * as the handle operations are privileged. 146 */ 147 STATIC int 148 xfs_handle_acceptable( 149 void *context, 150 struct dentry *dentry) 151 { 152 return 1; 153 } 154 155 /* 156 * Convert userspace handle data into a dentry. 157 */ 158 struct dentry * 159 xfs_handle_to_dentry( 160 struct file *parfilp, 161 void __user *uhandle, 162 u32 hlen) 163 { 164 xfs_handle_t handle; 165 struct xfs_fid64 fid; 166 167 /* 168 * Only allow handle opens under a directory. 169 */ 170 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode)) 171 return ERR_PTR(-ENOTDIR); 172 173 if (hlen != sizeof(xfs_handle_t)) 174 return ERR_PTR(-EINVAL); 175 if (copy_from_user(&handle, uhandle, hlen)) 176 return ERR_PTR(-EFAULT); 177 if (handle.ha_fid.fid_len != 178 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 179 return ERR_PTR(-EINVAL); 180 181 memset(&fid, 0, sizeof(struct fid)); 182 fid.ino = handle.ha_fid.fid_ino; 183 fid.gen = handle.ha_fid.fid_gen; 184 185 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 186 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 187 xfs_handle_acceptable, NULL); 188 } 189 190 STATIC struct dentry * 191 xfs_handlereq_to_dentry( 192 struct file *parfilp, 193 xfs_fsop_handlereq_t *hreq) 194 { 195 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 196 } 197 198 int 199 xfs_open_by_handle( 200 struct file *parfilp, 201 xfs_fsop_handlereq_t *hreq) 202 { 203 const struct cred *cred = current_cred(); 204 int error; 205 int fd; 206 int permflag; 207 struct file *filp; 208 struct inode *inode; 209 struct dentry *dentry; 210 fmode_t fmode; 211 struct path path; 212 213 if (!capable(CAP_SYS_ADMIN)) 214 return -XFS_ERROR(EPERM); 215 216 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 217 if (IS_ERR(dentry)) 218 return PTR_ERR(dentry); 219 inode = dentry->d_inode; 220 221 /* Restrict xfs_open_by_handle to directories & regular files. */ 222 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 223 error = -XFS_ERROR(EPERM); 224 goto out_dput; 225 } 226 227 #if BITS_PER_LONG != 32 228 hreq->oflags |= O_LARGEFILE; 229 #endif 230 231 permflag = hreq->oflags; 232 fmode = OPEN_FMODE(permflag); 233 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 234 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 235 error = -XFS_ERROR(EPERM); 236 goto out_dput; 237 } 238 239 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 240 error = -XFS_ERROR(EACCES); 241 goto out_dput; 242 } 243 244 /* Can't write directories. */ 245 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 246 error = -XFS_ERROR(EISDIR); 247 goto out_dput; 248 } 249 250 fd = get_unused_fd(); 251 if (fd < 0) { 252 error = fd; 253 goto out_dput; 254 } 255 256 path.mnt = parfilp->f_path.mnt; 257 path.dentry = dentry; 258 filp = dentry_open(&path, hreq->oflags, cred); 259 dput(dentry); 260 if (IS_ERR(filp)) { 261 put_unused_fd(fd); 262 return PTR_ERR(filp); 263 } 264 265 if (S_ISREG(inode->i_mode)) { 266 filp->f_flags |= O_NOATIME; 267 filp->f_mode |= FMODE_NOCMTIME; 268 } 269 270 fd_install(fd, filp); 271 return fd; 272 273 out_dput: 274 dput(dentry); 275 return error; 276 } 277 278 /* 279 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's 280 * unused first argument. 281 */ 282 STATIC int 283 do_readlink( 284 char __user *buffer, 285 int buflen, 286 const char *link) 287 { 288 int len; 289 290 len = PTR_ERR(link); 291 if (IS_ERR(link)) 292 goto out; 293 294 len = strlen(link); 295 if (len > (unsigned) buflen) 296 len = buflen; 297 if (copy_to_user(buffer, link, len)) 298 len = -EFAULT; 299 out: 300 return len; 301 } 302 303 304 int 305 xfs_readlink_by_handle( 306 struct file *parfilp, 307 xfs_fsop_handlereq_t *hreq) 308 { 309 struct dentry *dentry; 310 __u32 olen; 311 void *link; 312 int error; 313 314 if (!capable(CAP_SYS_ADMIN)) 315 return -XFS_ERROR(EPERM); 316 317 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 318 if (IS_ERR(dentry)) 319 return PTR_ERR(dentry); 320 321 /* Restrict this handle operation to symlinks only. */ 322 if (!S_ISLNK(dentry->d_inode->i_mode)) { 323 error = -XFS_ERROR(EINVAL); 324 goto out_dput; 325 } 326 327 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 328 error = -XFS_ERROR(EFAULT); 329 goto out_dput; 330 } 331 332 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); 333 if (!link) { 334 error = -XFS_ERROR(ENOMEM); 335 goto out_dput; 336 } 337 338 error = -xfs_readlink(XFS_I(dentry->d_inode), link); 339 if (error) 340 goto out_kfree; 341 error = do_readlink(hreq->ohandle, olen, link); 342 if (error) 343 goto out_kfree; 344 345 out_kfree: 346 kfree(link); 347 out_dput: 348 dput(dentry); 349 return error; 350 } 351 352 STATIC int 353 xfs_fssetdm_by_handle( 354 struct file *parfilp, 355 void __user *arg) 356 { 357 int error; 358 struct fsdmidata fsd; 359 xfs_fsop_setdm_handlereq_t dmhreq; 360 struct dentry *dentry; 361 362 if (!capable(CAP_MKNOD)) 363 return -XFS_ERROR(EPERM); 364 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) 365 return -XFS_ERROR(EFAULT); 366 367 error = mnt_want_write_file(parfilp); 368 if (error) 369 return error; 370 371 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); 372 if (IS_ERR(dentry)) { 373 mnt_drop_write_file(parfilp); 374 return PTR_ERR(dentry); 375 } 376 377 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) { 378 error = -XFS_ERROR(EPERM); 379 goto out; 380 } 381 382 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { 383 error = -XFS_ERROR(EFAULT); 384 goto out; 385 } 386 387 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask, 388 fsd.fsd_dmstate); 389 390 out: 391 mnt_drop_write_file(parfilp); 392 dput(dentry); 393 return error; 394 } 395 396 STATIC int 397 xfs_attrlist_by_handle( 398 struct file *parfilp, 399 void __user *arg) 400 { 401 int error = -ENOMEM; 402 attrlist_cursor_kern_t *cursor; 403 xfs_fsop_attrlist_handlereq_t al_hreq; 404 struct dentry *dentry; 405 char *kbuf; 406 407 if (!capable(CAP_SYS_ADMIN)) 408 return -XFS_ERROR(EPERM); 409 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 410 return -XFS_ERROR(EFAULT); 411 if (al_hreq.buflen > XATTR_LIST_MAX) 412 return -XFS_ERROR(EINVAL); 413 414 /* 415 * Reject flags, only allow namespaces. 416 */ 417 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 418 return -XFS_ERROR(EINVAL); 419 420 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 421 if (IS_ERR(dentry)) 422 return PTR_ERR(dentry); 423 424 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL); 425 if (!kbuf) 426 goto out_dput; 427 428 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 429 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen, 430 al_hreq.flags, cursor); 431 if (error) 432 goto out_kfree; 433 434 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 435 error = -EFAULT; 436 437 out_kfree: 438 kfree(kbuf); 439 out_dput: 440 dput(dentry); 441 return error; 442 } 443 444 int 445 xfs_attrmulti_attr_get( 446 struct inode *inode, 447 unsigned char *name, 448 unsigned char __user *ubuf, 449 __uint32_t *len, 450 __uint32_t flags) 451 { 452 unsigned char *kbuf; 453 int error = EFAULT; 454 455 if (*len > XATTR_SIZE_MAX) 456 return EINVAL; 457 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL); 458 if (!kbuf) { 459 kbuf = kmem_zalloc_large(*len); 460 if (!kbuf) 461 return ENOMEM; 462 } 463 464 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); 465 if (error) 466 goto out_kfree; 467 468 if (copy_to_user(ubuf, kbuf, *len)) 469 error = EFAULT; 470 471 out_kfree: 472 if (is_vmalloc_addr(kbuf)) 473 kmem_free_large(kbuf); 474 else 475 kmem_free(kbuf); 476 return error; 477 } 478 479 int 480 xfs_attrmulti_attr_set( 481 struct inode *inode, 482 unsigned char *name, 483 const unsigned char __user *ubuf, 484 __uint32_t len, 485 __uint32_t flags) 486 { 487 unsigned char *kbuf; 488 int error = EFAULT; 489 490 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 491 return EPERM; 492 if (len > XATTR_SIZE_MAX) 493 return EINVAL; 494 495 kbuf = memdup_user(ubuf, len); 496 if (IS_ERR(kbuf)) 497 return PTR_ERR(kbuf); 498 499 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 500 501 return error; 502 } 503 504 int 505 xfs_attrmulti_attr_remove( 506 struct inode *inode, 507 unsigned char *name, 508 __uint32_t flags) 509 { 510 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 511 return EPERM; 512 return xfs_attr_remove(XFS_I(inode), name, flags); 513 } 514 515 STATIC int 516 xfs_attrmulti_by_handle( 517 struct file *parfilp, 518 void __user *arg) 519 { 520 int error; 521 xfs_attr_multiop_t *ops; 522 xfs_fsop_attrmulti_handlereq_t am_hreq; 523 struct dentry *dentry; 524 unsigned int i, size; 525 unsigned char *attr_name; 526 527 if (!capable(CAP_SYS_ADMIN)) 528 return -XFS_ERROR(EPERM); 529 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 530 return -XFS_ERROR(EFAULT); 531 532 /* overflow check */ 533 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 534 return -E2BIG; 535 536 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 537 if (IS_ERR(dentry)) 538 return PTR_ERR(dentry); 539 540 error = E2BIG; 541 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 542 if (!size || size > 16 * PAGE_SIZE) 543 goto out_dput; 544 545 ops = memdup_user(am_hreq.ops, size); 546 if (IS_ERR(ops)) { 547 error = PTR_ERR(ops); 548 goto out_dput; 549 } 550 551 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 552 if (!attr_name) 553 goto out_kfree_ops; 554 555 error = 0; 556 for (i = 0; i < am_hreq.opcount; i++) { 557 ops[i].am_error = strncpy_from_user((char *)attr_name, 558 ops[i].am_attrname, MAXNAMELEN); 559 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 560 error = -ERANGE; 561 if (ops[i].am_error < 0) 562 break; 563 564 switch (ops[i].am_opcode) { 565 case ATTR_OP_GET: 566 ops[i].am_error = xfs_attrmulti_attr_get( 567 dentry->d_inode, attr_name, 568 ops[i].am_attrvalue, &ops[i].am_length, 569 ops[i].am_flags); 570 break; 571 case ATTR_OP_SET: 572 ops[i].am_error = mnt_want_write_file(parfilp); 573 if (ops[i].am_error) 574 break; 575 ops[i].am_error = xfs_attrmulti_attr_set( 576 dentry->d_inode, attr_name, 577 ops[i].am_attrvalue, ops[i].am_length, 578 ops[i].am_flags); 579 mnt_drop_write_file(parfilp); 580 break; 581 case ATTR_OP_REMOVE: 582 ops[i].am_error = mnt_want_write_file(parfilp); 583 if (ops[i].am_error) 584 break; 585 ops[i].am_error = xfs_attrmulti_attr_remove( 586 dentry->d_inode, attr_name, 587 ops[i].am_flags); 588 mnt_drop_write_file(parfilp); 589 break; 590 default: 591 ops[i].am_error = EINVAL; 592 } 593 } 594 595 if (copy_to_user(am_hreq.ops, ops, size)) 596 error = XFS_ERROR(EFAULT); 597 598 kfree(attr_name); 599 out_kfree_ops: 600 kfree(ops); 601 out_dput: 602 dput(dentry); 603 return -error; 604 } 605 606 int 607 xfs_ioc_space( 608 struct xfs_inode *ip, 609 struct inode *inode, 610 struct file *filp, 611 int ioflags, 612 unsigned int cmd, 613 xfs_flock64_t *bf) 614 { 615 int attr_flags = 0; 616 int error; 617 618 /* 619 * Only allow the sys admin to reserve space unless 620 * unwritten extents are enabled. 621 */ 622 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && 623 !capable(CAP_SYS_ADMIN)) 624 return -XFS_ERROR(EPERM); 625 626 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 627 return -XFS_ERROR(EPERM); 628 629 if (!(filp->f_mode & FMODE_WRITE)) 630 return -XFS_ERROR(EBADF); 631 632 if (!S_ISREG(inode->i_mode)) 633 return -XFS_ERROR(EINVAL); 634 635 if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) 636 attr_flags |= XFS_ATTR_NONBLOCK; 637 638 if (filp->f_flags & O_DSYNC) 639 attr_flags |= XFS_ATTR_SYNC; 640 641 if (ioflags & IO_INVIS) 642 attr_flags |= XFS_ATTR_DMI; 643 644 error = mnt_want_write_file(filp); 645 if (error) 646 return error; 647 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags); 648 mnt_drop_write_file(filp); 649 return -error; 650 } 651 652 STATIC int 653 xfs_ioc_bulkstat( 654 xfs_mount_t *mp, 655 unsigned int cmd, 656 void __user *arg) 657 { 658 xfs_fsop_bulkreq_t bulkreq; 659 int count; /* # of records returned */ 660 xfs_ino_t inlast; /* last inode number */ 661 int done; 662 int error; 663 664 /* done = 1 if there are more stats to get and if bulkstat */ 665 /* should be called again (unused here, but used in dmapi) */ 666 667 if (!capable(CAP_SYS_ADMIN)) 668 return -EPERM; 669 670 if (XFS_FORCED_SHUTDOWN(mp)) 671 return -XFS_ERROR(EIO); 672 673 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) 674 return -XFS_ERROR(EFAULT); 675 676 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) 677 return -XFS_ERROR(EFAULT); 678 679 if ((count = bulkreq.icount) <= 0) 680 return -XFS_ERROR(EINVAL); 681 682 if (bulkreq.ubuffer == NULL) 683 return -XFS_ERROR(EINVAL); 684 685 if (cmd == XFS_IOC_FSINUMBERS) 686 error = xfs_inumbers(mp, &inlast, &count, 687 bulkreq.ubuffer, xfs_inumbers_fmt); 688 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) 689 error = xfs_bulkstat_single(mp, &inlast, 690 bulkreq.ubuffer, &done); 691 else /* XFS_IOC_FSBULKSTAT */ 692 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, 693 sizeof(xfs_bstat_t), bulkreq.ubuffer, 694 &done); 695 696 if (error) 697 return -error; 698 699 if (bulkreq.ocount != NULL) { 700 if (copy_to_user(bulkreq.lastip, &inlast, 701 sizeof(xfs_ino_t))) 702 return -XFS_ERROR(EFAULT); 703 704 if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) 705 return -XFS_ERROR(EFAULT); 706 } 707 708 return 0; 709 } 710 711 STATIC int 712 xfs_ioc_fsgeometry_v1( 713 xfs_mount_t *mp, 714 void __user *arg) 715 { 716 xfs_fsop_geom_t fsgeo; 717 int error; 718 719 error = xfs_fs_geometry(mp, &fsgeo, 3); 720 if (error) 721 return -error; 722 723 /* 724 * Caller should have passed an argument of type 725 * xfs_fsop_geom_v1_t. This is a proper subset of the 726 * xfs_fsop_geom_t that xfs_fs_geometry() fills in. 727 */ 728 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) 729 return -XFS_ERROR(EFAULT); 730 return 0; 731 } 732 733 STATIC int 734 xfs_ioc_fsgeometry( 735 xfs_mount_t *mp, 736 void __user *arg) 737 { 738 xfs_fsop_geom_t fsgeo; 739 int error; 740 741 error = xfs_fs_geometry(mp, &fsgeo, 4); 742 if (error) 743 return -error; 744 745 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) 746 return -XFS_ERROR(EFAULT); 747 return 0; 748 } 749 750 /* 751 * Linux extended inode flags interface. 752 */ 753 754 STATIC unsigned int 755 xfs_merge_ioc_xflags( 756 unsigned int flags, 757 unsigned int start) 758 { 759 unsigned int xflags = start; 760 761 if (flags & FS_IMMUTABLE_FL) 762 xflags |= XFS_XFLAG_IMMUTABLE; 763 else 764 xflags &= ~XFS_XFLAG_IMMUTABLE; 765 if (flags & FS_APPEND_FL) 766 xflags |= XFS_XFLAG_APPEND; 767 else 768 xflags &= ~XFS_XFLAG_APPEND; 769 if (flags & FS_SYNC_FL) 770 xflags |= XFS_XFLAG_SYNC; 771 else 772 xflags &= ~XFS_XFLAG_SYNC; 773 if (flags & FS_NOATIME_FL) 774 xflags |= XFS_XFLAG_NOATIME; 775 else 776 xflags &= ~XFS_XFLAG_NOATIME; 777 if (flags & FS_NODUMP_FL) 778 xflags |= XFS_XFLAG_NODUMP; 779 else 780 xflags &= ~XFS_XFLAG_NODUMP; 781 782 return xflags; 783 } 784 785 STATIC unsigned int 786 xfs_di2lxflags( 787 __uint16_t di_flags) 788 { 789 unsigned int flags = 0; 790 791 if (di_flags & XFS_DIFLAG_IMMUTABLE) 792 flags |= FS_IMMUTABLE_FL; 793 if (di_flags & XFS_DIFLAG_APPEND) 794 flags |= FS_APPEND_FL; 795 if (di_flags & XFS_DIFLAG_SYNC) 796 flags |= FS_SYNC_FL; 797 if (di_flags & XFS_DIFLAG_NOATIME) 798 flags |= FS_NOATIME_FL; 799 if (di_flags & XFS_DIFLAG_NODUMP) 800 flags |= FS_NODUMP_FL; 801 return flags; 802 } 803 804 STATIC int 805 xfs_ioc_fsgetxattr( 806 xfs_inode_t *ip, 807 int attr, 808 void __user *arg) 809 { 810 struct fsxattr fa; 811 812 memset(&fa, 0, sizeof(struct fsxattr)); 813 814 xfs_ilock(ip, XFS_ILOCK_SHARED); 815 fa.fsx_xflags = xfs_ip2xflags(ip); 816 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 817 fa.fsx_projid = xfs_get_projid(ip); 818 819 if (attr) { 820 if (ip->i_afp) { 821 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 822 fa.fsx_nextents = ip->i_afp->if_bytes / 823 sizeof(xfs_bmbt_rec_t); 824 else 825 fa.fsx_nextents = ip->i_d.di_anextents; 826 } else 827 fa.fsx_nextents = 0; 828 } else { 829 if (ip->i_df.if_flags & XFS_IFEXTENTS) 830 fa.fsx_nextents = ip->i_df.if_bytes / 831 sizeof(xfs_bmbt_rec_t); 832 else 833 fa.fsx_nextents = ip->i_d.di_nextents; 834 } 835 xfs_iunlock(ip, XFS_ILOCK_SHARED); 836 837 if (copy_to_user(arg, &fa, sizeof(fa))) 838 return -EFAULT; 839 return 0; 840 } 841 842 STATIC void 843 xfs_set_diflags( 844 struct xfs_inode *ip, 845 unsigned int xflags) 846 { 847 unsigned int di_flags; 848 849 /* can't set PREALLOC this way, just preserve it */ 850 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 851 if (xflags & XFS_XFLAG_IMMUTABLE) 852 di_flags |= XFS_DIFLAG_IMMUTABLE; 853 if (xflags & XFS_XFLAG_APPEND) 854 di_flags |= XFS_DIFLAG_APPEND; 855 if (xflags & XFS_XFLAG_SYNC) 856 di_flags |= XFS_DIFLAG_SYNC; 857 if (xflags & XFS_XFLAG_NOATIME) 858 di_flags |= XFS_DIFLAG_NOATIME; 859 if (xflags & XFS_XFLAG_NODUMP) 860 di_flags |= XFS_DIFLAG_NODUMP; 861 if (xflags & XFS_XFLAG_PROJINHERIT) 862 di_flags |= XFS_DIFLAG_PROJINHERIT; 863 if (xflags & XFS_XFLAG_NODEFRAG) 864 di_flags |= XFS_DIFLAG_NODEFRAG; 865 if (xflags & XFS_XFLAG_FILESTREAM) 866 di_flags |= XFS_DIFLAG_FILESTREAM; 867 if (S_ISDIR(ip->i_d.di_mode)) { 868 if (xflags & XFS_XFLAG_RTINHERIT) 869 di_flags |= XFS_DIFLAG_RTINHERIT; 870 if (xflags & XFS_XFLAG_NOSYMLINKS) 871 di_flags |= XFS_DIFLAG_NOSYMLINKS; 872 if (xflags & XFS_XFLAG_EXTSZINHERIT) 873 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 874 } else if (S_ISREG(ip->i_d.di_mode)) { 875 if (xflags & XFS_XFLAG_REALTIME) 876 di_flags |= XFS_DIFLAG_REALTIME; 877 if (xflags & XFS_XFLAG_EXTSIZE) 878 di_flags |= XFS_DIFLAG_EXTSIZE; 879 } 880 881 ip->i_d.di_flags = di_flags; 882 } 883 884 STATIC void 885 xfs_diflags_to_linux( 886 struct xfs_inode *ip) 887 { 888 struct inode *inode = VFS_I(ip); 889 unsigned int xflags = xfs_ip2xflags(ip); 890 891 if (xflags & XFS_XFLAG_IMMUTABLE) 892 inode->i_flags |= S_IMMUTABLE; 893 else 894 inode->i_flags &= ~S_IMMUTABLE; 895 if (xflags & XFS_XFLAG_APPEND) 896 inode->i_flags |= S_APPEND; 897 else 898 inode->i_flags &= ~S_APPEND; 899 if (xflags & XFS_XFLAG_SYNC) 900 inode->i_flags |= S_SYNC; 901 else 902 inode->i_flags &= ~S_SYNC; 903 if (xflags & XFS_XFLAG_NOATIME) 904 inode->i_flags |= S_NOATIME; 905 else 906 inode->i_flags &= ~S_NOATIME; 907 } 908 909 #define FSX_PROJID 1 910 #define FSX_EXTSIZE 2 911 #define FSX_XFLAGS 4 912 #define FSX_NONBLOCK 8 913 914 STATIC int 915 xfs_ioctl_setattr( 916 xfs_inode_t *ip, 917 struct fsxattr *fa, 918 int mask) 919 { 920 struct xfs_mount *mp = ip->i_mount; 921 struct xfs_trans *tp; 922 unsigned int lock_flags = 0; 923 struct xfs_dquot *udqp = NULL; 924 struct xfs_dquot *gdqp = NULL; 925 struct xfs_dquot *olddquot = NULL; 926 int code; 927 928 trace_xfs_ioctl_setattr(ip); 929 930 if (mp->m_flags & XFS_MOUNT_RDONLY) 931 return XFS_ERROR(EROFS); 932 if (XFS_FORCED_SHUTDOWN(mp)) 933 return XFS_ERROR(EIO); 934 935 /* 936 * Disallow 32bit project ids when projid32bit feature is not enabled. 937 */ 938 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) && 939 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 940 return XFS_ERROR(EINVAL); 941 942 /* 943 * If disk quotas is on, we make sure that the dquots do exist on disk, 944 * before we start any other transactions. Trying to do this later 945 * is messy. We don't care to take a readlock to look at the ids 946 * in inode here, because we can't hold it across the trans_reserve. 947 * If the IDs do change before we take the ilock, we're covered 948 * because the i_*dquot fields will get updated anyway. 949 */ 950 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) { 951 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 952 ip->i_d.di_gid, fa->fsx_projid, 953 XFS_QMOPT_PQUOTA, &udqp, &gdqp); 954 if (code) 955 return code; 956 } 957 958 /* 959 * For the other attributes, we acquire the inode lock and 960 * first do an error checking pass. 961 */ 962 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); 963 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0); 964 if (code) 965 goto error_return; 966 967 lock_flags = XFS_ILOCK_EXCL; 968 xfs_ilock(ip, lock_flags); 969 970 /* 971 * CAP_FOWNER overrides the following restrictions: 972 * 973 * The user ID of the calling process must be equal 974 * to the file owner ID, except in cases where the 975 * CAP_FSETID capability is applicable. 976 */ 977 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) { 978 code = XFS_ERROR(EPERM); 979 goto error_return; 980 } 981 982 /* 983 * Do a quota reservation only if projid is actually going to change. 984 */ 985 if (mask & FSX_PROJID) { 986 if (XFS_IS_QUOTA_RUNNING(mp) && 987 XFS_IS_PQUOTA_ON(mp) && 988 xfs_get_projid(ip) != fa->fsx_projid) { 989 ASSERT(tp); 990 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, 991 capable(CAP_FOWNER) ? 992 XFS_QMOPT_FORCE_RES : 0); 993 if (code) /* out of quota */ 994 goto error_return; 995 } 996 } 997 998 if (mask & FSX_EXTSIZE) { 999 /* 1000 * Can't change extent size if any extents are allocated. 1001 */ 1002 if (ip->i_d.di_nextents && 1003 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != 1004 fa->fsx_extsize)) { 1005 code = XFS_ERROR(EINVAL); /* EFBIG? */ 1006 goto error_return; 1007 } 1008 1009 /* 1010 * Extent size must be a multiple of the appropriate block 1011 * size, if set at all. It must also be smaller than the 1012 * maximum extent size supported by the filesystem. 1013 * 1014 * Also, for non-realtime files, limit the extent size hint to 1015 * half the size of the AGs in the filesystem so alignment 1016 * doesn't result in extents larger than an AG. 1017 */ 1018 if (fa->fsx_extsize != 0) { 1019 xfs_extlen_t size; 1020 xfs_fsblock_t extsize_fsb; 1021 1022 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1023 if (extsize_fsb > MAXEXTLEN) { 1024 code = XFS_ERROR(EINVAL); 1025 goto error_return; 1026 } 1027 1028 if (XFS_IS_REALTIME_INODE(ip) || 1029 ((mask & FSX_XFLAGS) && 1030 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) { 1031 size = mp->m_sb.sb_rextsize << 1032 mp->m_sb.sb_blocklog; 1033 } else { 1034 size = mp->m_sb.sb_blocksize; 1035 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) { 1036 code = XFS_ERROR(EINVAL); 1037 goto error_return; 1038 } 1039 } 1040 1041 if (fa->fsx_extsize % size) { 1042 code = XFS_ERROR(EINVAL); 1043 goto error_return; 1044 } 1045 } 1046 } 1047 1048 1049 if (mask & FSX_XFLAGS) { 1050 /* 1051 * Can't change realtime flag if any extents are allocated. 1052 */ 1053 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1054 (XFS_IS_REALTIME_INODE(ip)) != 1055 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1056 code = XFS_ERROR(EINVAL); /* EFBIG? */ 1057 goto error_return; 1058 } 1059 1060 /* 1061 * If realtime flag is set then must have realtime data. 1062 */ 1063 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1064 if ((mp->m_sb.sb_rblocks == 0) || 1065 (mp->m_sb.sb_rextsize == 0) || 1066 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { 1067 code = XFS_ERROR(EINVAL); 1068 goto error_return; 1069 } 1070 } 1071 1072 /* 1073 * Can't modify an immutable/append-only file unless 1074 * we have appropriate permission. 1075 */ 1076 if ((ip->i_d.di_flags & 1077 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || 1078 (fa->fsx_xflags & 1079 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && 1080 !capable(CAP_LINUX_IMMUTABLE)) { 1081 code = XFS_ERROR(EPERM); 1082 goto error_return; 1083 } 1084 } 1085 1086 xfs_trans_ijoin(tp, ip, 0); 1087 1088 /* 1089 * Change file ownership. Must be the owner or privileged. 1090 */ 1091 if (mask & FSX_PROJID) { 1092 /* 1093 * CAP_FSETID overrides the following restrictions: 1094 * 1095 * The set-user-ID and set-group-ID bits of a file will be 1096 * cleared upon successful return from chown() 1097 */ 1098 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && 1099 !capable(CAP_FSETID)) 1100 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); 1101 1102 /* 1103 * Change the ownerships and register quota modifications 1104 * in the transaction. 1105 */ 1106 if (xfs_get_projid(ip) != fa->fsx_projid) { 1107 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1108 olddquot = xfs_qm_vop_chown(tp, ip, 1109 &ip->i_gdquot, gdqp); 1110 } 1111 xfs_set_projid(ip, fa->fsx_projid); 1112 1113 /* 1114 * We may have to rev the inode as well as 1115 * the superblock version number since projids didn't 1116 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. 1117 */ 1118 if (ip->i_d.di_version == 1) 1119 xfs_bump_ino_vers2(tp, ip); 1120 } 1121 1122 } 1123 1124 if (mask & FSX_EXTSIZE) 1125 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1126 if (mask & FSX_XFLAGS) { 1127 xfs_set_diflags(ip, fa->fsx_xflags); 1128 xfs_diflags_to_linux(ip); 1129 } 1130 1131 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1132 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1133 1134 XFS_STATS_INC(xs_ig_attrchg); 1135 1136 /* 1137 * If this is a synchronous mount, make sure that the 1138 * transaction goes to disk before returning to the user. 1139 * This is slightly sub-optimal in that truncates require 1140 * two sync transactions instead of one for wsync filesystems. 1141 * One for the truncate and one for the timestamps since we 1142 * don't want to change the timestamps unless we're sure the 1143 * truncate worked. Truncates are less than 1% of the laddis 1144 * mix so this probably isn't worth the trouble to optimize. 1145 */ 1146 if (mp->m_flags & XFS_MOUNT_WSYNC) 1147 xfs_trans_set_sync(tp); 1148 code = xfs_trans_commit(tp, 0); 1149 xfs_iunlock(ip, lock_flags); 1150 1151 /* 1152 * Release any dquot(s) the inode had kept before chown. 1153 */ 1154 xfs_qm_dqrele(olddquot); 1155 xfs_qm_dqrele(udqp); 1156 xfs_qm_dqrele(gdqp); 1157 1158 return code; 1159 1160 error_return: 1161 xfs_qm_dqrele(udqp); 1162 xfs_qm_dqrele(gdqp); 1163 xfs_trans_cancel(tp, 0); 1164 if (lock_flags) 1165 xfs_iunlock(ip, lock_flags); 1166 return code; 1167 } 1168 1169 STATIC int 1170 xfs_ioc_fssetxattr( 1171 xfs_inode_t *ip, 1172 struct file *filp, 1173 void __user *arg) 1174 { 1175 struct fsxattr fa; 1176 unsigned int mask; 1177 int error; 1178 1179 if (copy_from_user(&fa, arg, sizeof(fa))) 1180 return -EFAULT; 1181 1182 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID; 1183 if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) 1184 mask |= FSX_NONBLOCK; 1185 1186 error = mnt_want_write_file(filp); 1187 if (error) 1188 return error; 1189 error = xfs_ioctl_setattr(ip, &fa, mask); 1190 mnt_drop_write_file(filp); 1191 return -error; 1192 } 1193 1194 STATIC int 1195 xfs_ioc_getxflags( 1196 xfs_inode_t *ip, 1197 void __user *arg) 1198 { 1199 unsigned int flags; 1200 1201 flags = xfs_di2lxflags(ip->i_d.di_flags); 1202 if (copy_to_user(arg, &flags, sizeof(flags))) 1203 return -EFAULT; 1204 return 0; 1205 } 1206 1207 STATIC int 1208 xfs_ioc_setxflags( 1209 xfs_inode_t *ip, 1210 struct file *filp, 1211 void __user *arg) 1212 { 1213 struct fsxattr fa; 1214 unsigned int flags; 1215 unsigned int mask; 1216 int error; 1217 1218 if (copy_from_user(&flags, arg, sizeof(flags))) 1219 return -EFAULT; 1220 1221 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1222 FS_NOATIME_FL | FS_NODUMP_FL | \ 1223 FS_SYNC_FL)) 1224 return -EOPNOTSUPP; 1225 1226 mask = FSX_XFLAGS; 1227 if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) 1228 mask |= FSX_NONBLOCK; 1229 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1230 1231 error = mnt_want_write_file(filp); 1232 if (error) 1233 return error; 1234 error = xfs_ioctl_setattr(ip, &fa, mask); 1235 mnt_drop_write_file(filp); 1236 return -error; 1237 } 1238 1239 STATIC int 1240 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) 1241 { 1242 struct getbmap __user *base = *ap; 1243 1244 /* copy only getbmap portion (not getbmapx) */ 1245 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1246 return XFS_ERROR(EFAULT); 1247 1248 *ap += sizeof(struct getbmap); 1249 return 0; 1250 } 1251 1252 STATIC int 1253 xfs_ioc_getbmap( 1254 struct xfs_inode *ip, 1255 int ioflags, 1256 unsigned int cmd, 1257 void __user *arg) 1258 { 1259 struct getbmapx bmx; 1260 int error; 1261 1262 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) 1263 return -XFS_ERROR(EFAULT); 1264 1265 if (bmx.bmv_count < 2) 1266 return -XFS_ERROR(EINVAL); 1267 1268 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1269 if (ioflags & IO_INVIS) 1270 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1271 1272 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, 1273 (struct getbmap *)arg+1); 1274 if (error) 1275 return -error; 1276 1277 /* copy back header - only size of getbmap */ 1278 if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) 1279 return -XFS_ERROR(EFAULT); 1280 return 0; 1281 } 1282 1283 STATIC int 1284 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) 1285 { 1286 struct getbmapx __user *base = *ap; 1287 1288 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1289 return XFS_ERROR(EFAULT); 1290 1291 *ap += sizeof(struct getbmapx); 1292 return 0; 1293 } 1294 1295 STATIC int 1296 xfs_ioc_getbmapx( 1297 struct xfs_inode *ip, 1298 void __user *arg) 1299 { 1300 struct getbmapx bmx; 1301 int error; 1302 1303 if (copy_from_user(&bmx, arg, sizeof(bmx))) 1304 return -XFS_ERROR(EFAULT); 1305 1306 if (bmx.bmv_count < 2) 1307 return -XFS_ERROR(EINVAL); 1308 1309 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1310 return -XFS_ERROR(EINVAL); 1311 1312 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1313 (struct getbmapx *)arg+1); 1314 if (error) 1315 return -error; 1316 1317 /* copy back header */ 1318 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) 1319 return -XFS_ERROR(EFAULT); 1320 1321 return 0; 1322 } 1323 1324 /* 1325 * Note: some of the ioctl's return positive numbers as a 1326 * byte count indicating success, such as readlink_by_handle. 1327 * So we don't "sign flip" like most other routines. This means 1328 * true errors need to be returned as a negative value. 1329 */ 1330 long 1331 xfs_file_ioctl( 1332 struct file *filp, 1333 unsigned int cmd, 1334 unsigned long p) 1335 { 1336 struct inode *inode = filp->f_path.dentry->d_inode; 1337 struct xfs_inode *ip = XFS_I(inode); 1338 struct xfs_mount *mp = ip->i_mount; 1339 void __user *arg = (void __user *)p; 1340 int ioflags = 0; 1341 int error; 1342 1343 if (filp->f_mode & FMODE_NOCMTIME) 1344 ioflags |= IO_INVIS; 1345 1346 trace_xfs_file_ioctl(ip); 1347 1348 switch (cmd) { 1349 case FITRIM: 1350 return xfs_ioc_trim(mp, arg); 1351 case XFS_IOC_ALLOCSP: 1352 case XFS_IOC_FREESP: 1353 case XFS_IOC_RESVSP: 1354 case XFS_IOC_UNRESVSP: 1355 case XFS_IOC_ALLOCSP64: 1356 case XFS_IOC_FREESP64: 1357 case XFS_IOC_RESVSP64: 1358 case XFS_IOC_UNRESVSP64: 1359 case XFS_IOC_ZERO_RANGE: { 1360 xfs_flock64_t bf; 1361 1362 if (copy_from_user(&bf, arg, sizeof(bf))) 1363 return -XFS_ERROR(EFAULT); 1364 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf); 1365 } 1366 case XFS_IOC_DIOINFO: { 1367 struct dioattr da; 1368 xfs_buftarg_t *target = 1369 XFS_IS_REALTIME_INODE(ip) ? 1370 mp->m_rtdev_targp : mp->m_ddev_targp; 1371 1372 da.d_mem = da.d_miniosz = 1 << target->bt_sshift; 1373 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1374 1375 if (copy_to_user(arg, &da, sizeof(da))) 1376 return -XFS_ERROR(EFAULT); 1377 return 0; 1378 } 1379 1380 case XFS_IOC_FSBULKSTAT_SINGLE: 1381 case XFS_IOC_FSBULKSTAT: 1382 case XFS_IOC_FSINUMBERS: 1383 return xfs_ioc_bulkstat(mp, cmd, arg); 1384 1385 case XFS_IOC_FSGEOMETRY_V1: 1386 return xfs_ioc_fsgeometry_v1(mp, arg); 1387 1388 case XFS_IOC_FSGEOMETRY: 1389 return xfs_ioc_fsgeometry(mp, arg); 1390 1391 case XFS_IOC_GETVERSION: 1392 return put_user(inode->i_generation, (int __user *)arg); 1393 1394 case XFS_IOC_FSGETXATTR: 1395 return xfs_ioc_fsgetxattr(ip, 0, arg); 1396 case XFS_IOC_FSGETXATTRA: 1397 return xfs_ioc_fsgetxattr(ip, 1, arg); 1398 case XFS_IOC_FSSETXATTR: 1399 return xfs_ioc_fssetxattr(ip, filp, arg); 1400 case XFS_IOC_GETXFLAGS: 1401 return xfs_ioc_getxflags(ip, arg); 1402 case XFS_IOC_SETXFLAGS: 1403 return xfs_ioc_setxflags(ip, filp, arg); 1404 1405 case XFS_IOC_FSSETDM: { 1406 struct fsdmidata dmi; 1407 1408 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1409 return -XFS_ERROR(EFAULT); 1410 1411 error = mnt_want_write_file(filp); 1412 if (error) 1413 return error; 1414 1415 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1416 dmi.fsd_dmstate); 1417 mnt_drop_write_file(filp); 1418 return -error; 1419 } 1420 1421 case XFS_IOC_GETBMAP: 1422 case XFS_IOC_GETBMAPA: 1423 return xfs_ioc_getbmap(ip, ioflags, cmd, arg); 1424 1425 case XFS_IOC_GETBMAPX: 1426 return xfs_ioc_getbmapx(ip, arg); 1427 1428 case XFS_IOC_FD_TO_HANDLE: 1429 case XFS_IOC_PATH_TO_HANDLE: 1430 case XFS_IOC_PATH_TO_FSHANDLE: { 1431 xfs_fsop_handlereq_t hreq; 1432 1433 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1434 return -XFS_ERROR(EFAULT); 1435 return xfs_find_handle(cmd, &hreq); 1436 } 1437 case XFS_IOC_OPEN_BY_HANDLE: { 1438 xfs_fsop_handlereq_t hreq; 1439 1440 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1441 return -XFS_ERROR(EFAULT); 1442 return xfs_open_by_handle(filp, &hreq); 1443 } 1444 case XFS_IOC_FSSETDM_BY_HANDLE: 1445 return xfs_fssetdm_by_handle(filp, arg); 1446 1447 case XFS_IOC_READLINK_BY_HANDLE: { 1448 xfs_fsop_handlereq_t hreq; 1449 1450 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1451 return -XFS_ERROR(EFAULT); 1452 return xfs_readlink_by_handle(filp, &hreq); 1453 } 1454 case XFS_IOC_ATTRLIST_BY_HANDLE: 1455 return xfs_attrlist_by_handle(filp, arg); 1456 1457 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1458 return xfs_attrmulti_by_handle(filp, arg); 1459 1460 case XFS_IOC_SWAPEXT: { 1461 struct xfs_swapext sxp; 1462 1463 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1464 return -XFS_ERROR(EFAULT); 1465 error = mnt_want_write_file(filp); 1466 if (error) 1467 return error; 1468 error = xfs_swapext(&sxp); 1469 mnt_drop_write_file(filp); 1470 return -error; 1471 } 1472 1473 case XFS_IOC_FSCOUNTS: { 1474 xfs_fsop_counts_t out; 1475 1476 error = xfs_fs_counts(mp, &out); 1477 if (error) 1478 return -error; 1479 1480 if (copy_to_user(arg, &out, sizeof(out))) 1481 return -XFS_ERROR(EFAULT); 1482 return 0; 1483 } 1484 1485 case XFS_IOC_SET_RESBLKS: { 1486 xfs_fsop_resblks_t inout; 1487 __uint64_t in; 1488 1489 if (!capable(CAP_SYS_ADMIN)) 1490 return -EPERM; 1491 1492 if (mp->m_flags & XFS_MOUNT_RDONLY) 1493 return -XFS_ERROR(EROFS); 1494 1495 if (copy_from_user(&inout, arg, sizeof(inout))) 1496 return -XFS_ERROR(EFAULT); 1497 1498 error = mnt_want_write_file(filp); 1499 if (error) 1500 return error; 1501 1502 /* input parameter is passed in resblks field of structure */ 1503 in = inout.resblks; 1504 error = xfs_reserve_blocks(mp, &in, &inout); 1505 mnt_drop_write_file(filp); 1506 if (error) 1507 return -error; 1508 1509 if (copy_to_user(arg, &inout, sizeof(inout))) 1510 return -XFS_ERROR(EFAULT); 1511 return 0; 1512 } 1513 1514 case XFS_IOC_GET_RESBLKS: { 1515 xfs_fsop_resblks_t out; 1516 1517 if (!capable(CAP_SYS_ADMIN)) 1518 return -EPERM; 1519 1520 error = xfs_reserve_blocks(mp, NULL, &out); 1521 if (error) 1522 return -error; 1523 1524 if (copy_to_user(arg, &out, sizeof(out))) 1525 return -XFS_ERROR(EFAULT); 1526 1527 return 0; 1528 } 1529 1530 case XFS_IOC_FSGROWFSDATA: { 1531 xfs_growfs_data_t in; 1532 1533 if (copy_from_user(&in, arg, sizeof(in))) 1534 return -XFS_ERROR(EFAULT); 1535 1536 error = mnt_want_write_file(filp); 1537 if (error) 1538 return error; 1539 error = xfs_growfs_data(mp, &in); 1540 mnt_drop_write_file(filp); 1541 return -error; 1542 } 1543 1544 case XFS_IOC_FSGROWFSLOG: { 1545 xfs_growfs_log_t in; 1546 1547 if (copy_from_user(&in, arg, sizeof(in))) 1548 return -XFS_ERROR(EFAULT); 1549 1550 error = mnt_want_write_file(filp); 1551 if (error) 1552 return error; 1553 error = xfs_growfs_log(mp, &in); 1554 mnt_drop_write_file(filp); 1555 return -error; 1556 } 1557 1558 case XFS_IOC_FSGROWFSRT: { 1559 xfs_growfs_rt_t in; 1560 1561 if (copy_from_user(&in, arg, sizeof(in))) 1562 return -XFS_ERROR(EFAULT); 1563 1564 error = mnt_want_write_file(filp); 1565 if (error) 1566 return error; 1567 error = xfs_growfs_rt(mp, &in); 1568 mnt_drop_write_file(filp); 1569 return -error; 1570 } 1571 1572 case XFS_IOC_GOINGDOWN: { 1573 __uint32_t in; 1574 1575 if (!capable(CAP_SYS_ADMIN)) 1576 return -EPERM; 1577 1578 if (get_user(in, (__uint32_t __user *)arg)) 1579 return -XFS_ERROR(EFAULT); 1580 1581 error = xfs_fs_goingdown(mp, in); 1582 return -error; 1583 } 1584 1585 case XFS_IOC_ERROR_INJECTION: { 1586 xfs_error_injection_t in; 1587 1588 if (!capable(CAP_SYS_ADMIN)) 1589 return -EPERM; 1590 1591 if (copy_from_user(&in, arg, sizeof(in))) 1592 return -XFS_ERROR(EFAULT); 1593 1594 error = xfs_errortag_add(in.errtag, mp); 1595 return -error; 1596 } 1597 1598 case XFS_IOC_ERROR_CLEARALL: 1599 if (!capable(CAP_SYS_ADMIN)) 1600 return -EPERM; 1601 1602 error = xfs_errortag_clearall(mp, 1); 1603 return -error; 1604 1605 default: 1606 return -ENOTTY; 1607 } 1608 } 1609