1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_shared.h" 9 #include "xfs_format.h" 10 #include "xfs_log_format.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_mount.h" 13 #include "xfs_inode.h" 14 #include "xfs_rtalloc.h" 15 #include "xfs_iwalk.h" 16 #include "xfs_itable.h" 17 #include "xfs_error.h" 18 #include "xfs_da_format.h" 19 #include "xfs_da_btree.h" 20 #include "xfs_attr.h" 21 #include "xfs_bmap.h" 22 #include "xfs_bmap_util.h" 23 #include "xfs_fsops.h" 24 #include "xfs_discard.h" 25 #include "xfs_quota.h" 26 #include "xfs_trace.h" 27 #include "xfs_icache.h" 28 #include "xfs_trans.h" 29 #include "xfs_btree.h" 30 #include <linux/fsmap.h> 31 #include "xfs_fsmap.h" 32 #include "scrub/xfs_scrub.h" 33 #include "xfs_sb.h" 34 #include "xfs_ag.h" 35 #include "xfs_health.h" 36 #include "xfs_reflink.h" 37 #include "xfs_ioctl.h" 38 #include "xfs_xattr.h" 39 #include "xfs_rtbitmap.h" 40 #include "xfs_file.h" 41 #include "xfs_exchrange.h" 42 #include "xfs_handle.h" 43 #include "xfs_rtgroup.h" 44 45 #include <linux/mount.h> 46 #include <linux/fileattr.h> 47 48 /* Return 0 on success or positive error */ 49 int 50 xfs_fsbulkstat_one_fmt( 51 struct xfs_ibulk *breq, 52 const struct xfs_bulkstat *bstat) 53 { 54 struct xfs_bstat bs1; 55 56 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat); 57 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1))) 58 return -EFAULT; 59 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat)); 60 } 61 62 int 63 xfs_fsinumbers_fmt( 64 struct xfs_ibulk *breq, 65 const struct xfs_inumbers *igrp) 66 { 67 struct xfs_inogrp ig1; 68 69 xfs_inumbers_to_inogrp(&ig1, igrp); 70 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp))) 71 return -EFAULT; 72 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp)); 73 } 74 75 STATIC int 76 xfs_ioc_fsbulkstat( 77 struct file *file, 78 unsigned int cmd, 79 void __user *arg) 80 { 81 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount; 82 struct xfs_fsop_bulkreq bulkreq; 83 struct xfs_ibulk breq = { 84 .mp = mp, 85 .idmap = file_mnt_idmap(file), 86 .ocount = 0, 87 }; 88 xfs_ino_t lastino; 89 int error; 90 91 /* done = 1 if there are more stats to get and if bulkstat */ 92 /* should be called again (unused here, but used in dmapi) */ 93 94 if (!capable(CAP_SYS_ADMIN)) 95 return -EPERM; 96 97 if (xfs_is_shutdown(mp)) 98 return -EIO; 99 100 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq))) 101 return -EFAULT; 102 103 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64))) 104 return -EFAULT; 105 106 if (bulkreq.icount <= 0) 107 return -EINVAL; 108 109 if (bulkreq.ubuffer == NULL) 110 return -EINVAL; 111 112 breq.ubuffer = bulkreq.ubuffer; 113 breq.icount = bulkreq.icount; 114 115 /* 116 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number 117 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect 118 * that *lastip contains either zero or the number of the last inode to 119 * be examined by the previous call and return results starting with 120 * the next inode after that. The new bulk request back end functions 121 * take the inode to start with, so we have to compute the startino 122 * parameter from lastino to maintain correct function. lastino == 0 123 * is a special case because it has traditionally meant "first inode 124 * in filesystem". 125 */ 126 if (cmd == XFS_IOC_FSINUMBERS) { 127 breq.startino = lastino ? lastino + 1 : 0; 128 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt); 129 lastino = breq.startino - 1; 130 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) { 131 breq.startino = lastino; 132 breq.icount = 1; 133 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt); 134 } else { /* XFS_IOC_FSBULKSTAT */ 135 breq.startino = lastino ? lastino + 1 : 0; 136 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt); 137 lastino = breq.startino - 1; 138 } 139 140 if (error) 141 return error; 142 143 if (bulkreq.lastip != NULL && 144 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t))) 145 return -EFAULT; 146 147 if (bulkreq.ocount != NULL && 148 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32))) 149 return -EFAULT; 150 151 return 0; 152 } 153 154 /* Return 0 on success or positive error */ 155 static int 156 xfs_bulkstat_fmt( 157 struct xfs_ibulk *breq, 158 const struct xfs_bulkstat *bstat) 159 { 160 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat))) 161 return -EFAULT; 162 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat)); 163 } 164 165 /* 166 * Check the incoming bulk request @hdr from userspace and initialize the 167 * internal @breq bulk request appropriately. Returns 0 if the bulk request 168 * should proceed; -ECANCELED if there's nothing to do; or the usual 169 * negative error code. 170 */ 171 static int 172 xfs_bulk_ireq_setup( 173 struct xfs_mount *mp, 174 const struct xfs_bulk_ireq *hdr, 175 struct xfs_ibulk *breq, 176 void __user *ubuffer) 177 { 178 if (hdr->icount == 0 || 179 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) || 180 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) 181 return -EINVAL; 182 183 breq->startino = hdr->ino; 184 breq->ubuffer = ubuffer; 185 breq->icount = hdr->icount; 186 breq->ocount = 0; 187 breq->flags = 0; 188 189 /* 190 * The @ino parameter is a special value, so we must look it up here. 191 * We're not allowed to have IREQ_AGNO, and we only return one inode 192 * worth of data. 193 */ 194 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) { 195 if (hdr->flags & XFS_BULK_IREQ_AGNO) 196 return -EINVAL; 197 198 switch (hdr->ino) { 199 case XFS_BULK_IREQ_SPECIAL_ROOT: 200 breq->startino = mp->m_sb.sb_rootino; 201 break; 202 default: 203 return -EINVAL; 204 } 205 breq->icount = 1; 206 } 207 208 /* 209 * The IREQ_AGNO flag means that we only want results from a given AG. 210 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is 211 * beyond the specified AG then we return no results. 212 */ 213 if (hdr->flags & XFS_BULK_IREQ_AGNO) { 214 if (hdr->agno >= mp->m_sb.sb_agcount) 215 return -EINVAL; 216 217 if (breq->startino == 0) 218 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0); 219 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno) 220 return -EINVAL; 221 222 breq->iwalk_flags |= XFS_IWALK_SAME_AG; 223 224 /* Asking for an inode past the end of the AG? We're done! */ 225 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno) 226 return -ECANCELED; 227 } else if (hdr->agno) 228 return -EINVAL; 229 230 /* Asking for an inode past the end of the FS? We're done! */ 231 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount) 232 return -ECANCELED; 233 234 if (hdr->flags & XFS_BULK_IREQ_NREXT64) 235 breq->flags |= XFS_IBULK_NREXT64; 236 237 /* Caller wants to see metadata directories in bulkstat output. */ 238 if (hdr->flags & XFS_BULK_IREQ_METADIR) 239 breq->flags |= XFS_IBULK_METADIR; 240 241 return 0; 242 } 243 244 /* 245 * Update the userspace bulk request @hdr to reflect the end state of the 246 * internal bulk request @breq. 247 */ 248 static void 249 xfs_bulk_ireq_teardown( 250 struct xfs_bulk_ireq *hdr, 251 struct xfs_ibulk *breq) 252 { 253 hdr->ino = breq->startino; 254 hdr->ocount = breq->ocount; 255 } 256 257 /* Handle the v5 bulkstat ioctl. */ 258 STATIC int 259 xfs_ioc_bulkstat( 260 struct file *file, 261 unsigned int cmd, 262 struct xfs_bulkstat_req __user *arg) 263 { 264 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount; 265 struct xfs_bulk_ireq hdr; 266 struct xfs_ibulk breq = { 267 .mp = mp, 268 .idmap = file_mnt_idmap(file), 269 }; 270 int error; 271 272 if (!capable(CAP_SYS_ADMIN)) 273 return -EPERM; 274 275 if (xfs_is_shutdown(mp)) 276 return -EIO; 277 278 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 279 return -EFAULT; 280 281 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat); 282 if (error == -ECANCELED) 283 goto out_teardown; 284 if (error < 0) 285 return error; 286 287 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt); 288 if (error) 289 return error; 290 291 out_teardown: 292 xfs_bulk_ireq_teardown(&hdr, &breq); 293 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 294 return -EFAULT; 295 296 return 0; 297 } 298 299 STATIC int 300 xfs_inumbers_fmt( 301 struct xfs_ibulk *breq, 302 const struct xfs_inumbers *igrp) 303 { 304 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers))) 305 return -EFAULT; 306 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers)); 307 } 308 309 /* Handle the v5 inumbers ioctl. */ 310 STATIC int 311 xfs_ioc_inumbers( 312 struct xfs_mount *mp, 313 unsigned int cmd, 314 struct xfs_inumbers_req __user *arg) 315 { 316 struct xfs_bulk_ireq hdr; 317 struct xfs_ibulk breq = { 318 .mp = mp, 319 }; 320 int error; 321 322 if (!capable(CAP_SYS_ADMIN)) 323 return -EPERM; 324 325 if (xfs_is_shutdown(mp)) 326 return -EIO; 327 328 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 329 return -EFAULT; 330 331 if (hdr.flags & XFS_BULK_IREQ_METADIR) 332 return -EINVAL; 333 334 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers); 335 if (error == -ECANCELED) 336 goto out_teardown; 337 if (error < 0) 338 return error; 339 340 error = xfs_inumbers(&breq, xfs_inumbers_fmt); 341 if (error) 342 return error; 343 344 out_teardown: 345 xfs_bulk_ireq_teardown(&hdr, &breq); 346 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 347 return -EFAULT; 348 349 return 0; 350 } 351 352 STATIC int 353 xfs_ioc_fsgeometry( 354 struct xfs_mount *mp, 355 void __user *arg, 356 int struct_version) 357 { 358 struct xfs_fsop_geom fsgeo; 359 size_t len; 360 361 xfs_fs_geometry(mp, &fsgeo, struct_version); 362 363 if (struct_version <= 3) 364 len = sizeof(struct xfs_fsop_geom_v1); 365 else if (struct_version == 4) 366 len = sizeof(struct xfs_fsop_geom_v4); 367 else { 368 xfs_fsop_geom_health(mp, &fsgeo); 369 len = sizeof(fsgeo); 370 } 371 372 if (copy_to_user(arg, &fsgeo, len)) 373 return -EFAULT; 374 return 0; 375 } 376 377 STATIC int 378 xfs_ioc_ag_geometry( 379 struct xfs_mount *mp, 380 void __user *arg) 381 { 382 struct xfs_perag *pag; 383 struct xfs_ag_geometry ageo; 384 int error; 385 386 if (copy_from_user(&ageo, arg, sizeof(ageo))) 387 return -EFAULT; 388 if (ageo.ag_flags) 389 return -EINVAL; 390 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved))) 391 return -EINVAL; 392 393 pag = xfs_perag_get(mp, ageo.ag_number); 394 if (!pag) 395 return -EINVAL; 396 397 error = xfs_ag_get_geometry(pag, &ageo); 398 xfs_perag_put(pag); 399 if (error) 400 return error; 401 402 if (copy_to_user(arg, &ageo, sizeof(ageo))) 403 return -EFAULT; 404 return 0; 405 } 406 407 STATIC int 408 xfs_ioc_rtgroup_geometry( 409 struct xfs_mount *mp, 410 void __user *arg) 411 { 412 struct xfs_rtgroup *rtg; 413 struct xfs_rtgroup_geometry rgeo; 414 int error; 415 416 if (copy_from_user(&rgeo, arg, sizeof(rgeo))) 417 return -EFAULT; 418 if (rgeo.rg_flags) 419 return -EINVAL; 420 if (memchr_inv(&rgeo.rg_reserved, 0, sizeof(rgeo.rg_reserved))) 421 return -EINVAL; 422 if (!xfs_has_rtgroups(mp)) 423 return -EINVAL; 424 425 rtg = xfs_rtgroup_get(mp, rgeo.rg_number); 426 if (!rtg) 427 return -EINVAL; 428 429 error = xfs_rtgroup_get_geometry(rtg, &rgeo); 430 xfs_rtgroup_put(rtg); 431 if (error) 432 return error; 433 434 if (copy_to_user(arg, &rgeo, sizeof(rgeo))) 435 return -EFAULT; 436 return 0; 437 } 438 439 /* 440 * Linux extended inode flags interface. 441 */ 442 443 static void 444 xfs_fill_fsxattr( 445 struct xfs_inode *ip, 446 int whichfork, 447 struct file_kattr *fa) 448 { 449 struct xfs_mount *mp = ip->i_mount; 450 struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork); 451 452 fileattr_fill_xflags(fa, xfs_ip2xflags(ip)); 453 454 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) { 455 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize); 456 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) { 457 /* 458 * Don't let a misaligned extent size hint on a directory 459 * escape to userspace if it won't pass the setattr checks 460 * later. 461 */ 462 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) && 463 xfs_extlen_to_rtxmod(mp, ip->i_extsize) > 0) { 464 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | 465 FS_XFLAG_EXTSZINHERIT); 466 fa->fsx_extsize = 0; 467 } else { 468 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize); 469 } 470 } 471 472 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) { 473 /* 474 * Don't let a misaligned CoW extent size hint on a directory 475 * escape to userspace if it won't pass the setattr checks 476 * later. 477 */ 478 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) && 479 ip->i_cowextsize % mp->m_sb.sb_rextsize > 0) { 480 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE; 481 fa->fsx_cowextsize = 0; 482 } else { 483 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize); 484 } 485 } 486 487 fa->fsx_projid = ip->i_projid; 488 if (ifp && !xfs_need_iread_extents(ifp)) 489 fa->fsx_nextents = xfs_iext_count(ifp); 490 else 491 fa->fsx_nextents = xfs_ifork_nextents(ifp); 492 } 493 494 STATIC int 495 xfs_ioc_fsgetxattra( 496 xfs_inode_t *ip, 497 void __user *arg) 498 { 499 struct file_kattr fa; 500 501 xfs_ilock(ip, XFS_ILOCK_SHARED); 502 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa); 503 xfs_iunlock(ip, XFS_ILOCK_SHARED); 504 505 return copy_fsxattr_to_user(&fa, arg); 506 } 507 508 int 509 xfs_fileattr_get( 510 struct dentry *dentry, 511 struct file_kattr *fa) 512 { 513 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 514 515 xfs_ilock(ip, XFS_ILOCK_SHARED); 516 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa); 517 xfs_iunlock(ip, XFS_ILOCK_SHARED); 518 519 return 0; 520 } 521 522 static int 523 xfs_ioctl_setattr_xflags( 524 struct xfs_trans *tp, 525 struct xfs_inode *ip, 526 struct file_kattr *fa) 527 { 528 struct xfs_mount *mp = ip->i_mount; 529 bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME); 530 uint64_t i_flags2; 531 532 if (rtflag != XFS_IS_REALTIME_INODE(ip)) { 533 /* Can't change realtime flag if any extents are allocated. */ 534 if (xfs_inode_has_filedata(ip)) 535 return -EINVAL; 536 537 /* 538 * If S_DAX is enabled on this file, we can only switch the 539 * device if both support fsdax. We can't update S_DAX because 540 * there might be other threads walking down the access paths. 541 */ 542 if (IS_DAX(VFS_I(ip)) && 543 (mp->m_ddev_targp->bt_daxdev == NULL || 544 (mp->m_rtdev_targp && 545 mp->m_rtdev_targp->bt_daxdev == NULL))) 546 return -EINVAL; 547 } 548 549 if (rtflag) { 550 /* If realtime flag is set then must have realtime device */ 551 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 552 xfs_extlen_to_rtxmod(mp, ip->i_extsize)) 553 return -EINVAL; 554 } 555 556 /* diflags2 only valid for v3 inodes. */ 557 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 558 if (i_flags2 && !xfs_has_v3inodes(mp)) 559 return -EINVAL; 560 561 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 562 ip->i_diflags2 = i_flags2; 563 564 xfs_diflags_to_iflags(ip, false); 565 566 /* 567 * Make the stable writes flag match that of the device the inode 568 * resides on when flipping the RT flag. 569 */ 570 if (rtflag != XFS_IS_REALTIME_INODE(ip) && S_ISREG(VFS_I(ip)->i_mode)) 571 xfs_update_stable_writes(ip); 572 573 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 574 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 575 XFS_STATS_INC(mp, xs_ig_attrchg); 576 return 0; 577 } 578 579 static void 580 xfs_ioctl_setattr_prepare_dax( 581 struct xfs_inode *ip, 582 struct file_kattr *fa) 583 { 584 struct xfs_mount *mp = ip->i_mount; 585 struct inode *inode = VFS_I(ip); 586 587 if (S_ISDIR(inode->i_mode)) 588 return; 589 590 if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp)) 591 return; 592 593 if (((fa->fsx_xflags & FS_XFLAG_DAX) && 594 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) || 595 (!(fa->fsx_xflags & FS_XFLAG_DAX) && 596 (ip->i_diflags2 & XFS_DIFLAG2_DAX))) 597 d_mark_dontcache(inode); 598 } 599 600 /* 601 * Set up the transaction structure for the setattr operation, checking that we 602 * have permission to do so. On success, return a clean transaction and the 603 * inode locked exclusively ready for further operation specific checks. On 604 * failure, return an error without modifying or locking the inode. 605 */ 606 static struct xfs_trans * 607 xfs_ioctl_setattr_get_trans( 608 struct xfs_inode *ip, 609 struct xfs_dquot *pdqp) 610 { 611 struct xfs_mount *mp = ip->i_mount; 612 struct xfs_trans *tp; 613 int error = -EROFS; 614 615 if (xfs_is_readonly(mp)) 616 goto out_error; 617 error = -EIO; 618 if (xfs_is_shutdown(mp)) 619 goto out_error; 620 621 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp, 622 has_capability_noaudit(current, CAP_FOWNER), &tp); 623 if (error) 624 goto out_error; 625 626 if (xfs_has_wsync(mp)) 627 xfs_trans_set_sync(tp); 628 629 return tp; 630 631 out_error: 632 return ERR_PTR(error); 633 } 634 635 /* 636 * Validate a proposed extent size hint. For regular files, the hint can only 637 * be changed if no extents are allocated. 638 */ 639 static int 640 xfs_ioctl_setattr_check_extsize( 641 struct xfs_inode *ip, 642 struct file_kattr *fa) 643 { 644 struct xfs_mount *mp = ip->i_mount; 645 xfs_failaddr_t failaddr; 646 uint16_t new_diflags; 647 648 if (!fa->fsx_valid) 649 return 0; 650 651 if (S_ISREG(VFS_I(ip)->i_mode) && xfs_inode_has_filedata(ip) && 652 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize) 653 return -EINVAL; 654 655 if (fa->fsx_extsize & mp->m_blockmask) 656 return -EINVAL; 657 658 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 659 660 /* 661 * Inode verifiers do not check that the extent size hint is an integer 662 * multiple of the rt extent size on a directory with both rtinherit 663 * and extszinherit flags set. Don't let sysadmins misconfigure 664 * directories. 665 */ 666 if ((new_diflags & XFS_DIFLAG_RTINHERIT) && 667 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) { 668 unsigned int rtextsize_bytes; 669 670 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize); 671 if (fa->fsx_extsize % rtextsize_bytes) 672 return -EINVAL; 673 } 674 675 failaddr = xfs_inode_validate_extsize(ip->i_mount, 676 XFS_B_TO_FSB(mp, fa->fsx_extsize), 677 VFS_I(ip)->i_mode, new_diflags); 678 return failaddr != NULL ? -EINVAL : 0; 679 } 680 681 static int 682 xfs_ioctl_setattr_check_cowextsize( 683 struct xfs_inode *ip, 684 struct file_kattr *fa) 685 { 686 struct xfs_mount *mp = ip->i_mount; 687 xfs_failaddr_t failaddr; 688 uint64_t new_diflags2; 689 uint16_t new_diflags; 690 691 if (!fa->fsx_valid) 692 return 0; 693 694 if (fa->fsx_cowextsize & mp->m_blockmask) 695 return -EINVAL; 696 697 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 698 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 699 700 failaddr = xfs_inode_validate_cowextsize(ip->i_mount, 701 XFS_B_TO_FSB(mp, fa->fsx_cowextsize), 702 VFS_I(ip)->i_mode, new_diflags, new_diflags2); 703 return failaddr != NULL ? -EINVAL : 0; 704 } 705 706 static int 707 xfs_ioctl_setattr_check_projid( 708 struct xfs_inode *ip, 709 struct file_kattr *fa) 710 { 711 if (!fa->fsx_valid) 712 return 0; 713 714 /* Disallow 32bit project ids if 32bit IDs are not enabled. */ 715 if (fa->fsx_projid > (uint16_t)-1 && 716 !xfs_has_projid32(ip->i_mount)) 717 return -EINVAL; 718 return 0; 719 } 720 721 int 722 xfs_fileattr_set( 723 struct mnt_idmap *idmap, 724 struct dentry *dentry, 725 struct file_kattr *fa) 726 { 727 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 728 struct xfs_mount *mp = ip->i_mount; 729 struct xfs_trans *tp; 730 struct xfs_dquot *pdqp = NULL; 731 struct xfs_dquot *olddquot = NULL; 732 int error; 733 734 trace_xfs_ioctl_setattr(ip); 735 736 if (!fa->fsx_valid) { 737 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | 738 FS_NOATIME_FL | FS_NODUMP_FL | 739 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL)) 740 return -EOPNOTSUPP; 741 } 742 743 error = xfs_ioctl_setattr_check_projid(ip, fa); 744 if (error) 745 return error; 746 747 /* 748 * If disk quotas is on, we make sure that the dquots do exist on disk, 749 * before we start any other transactions. Trying to do this later 750 * is messy. We don't care to take a readlock to look at the ids 751 * in inode here, because we can't hold it across the trans_reserve. 752 * If the IDs do change before we take the ilock, we're covered 753 * because the i_*dquot fields will get updated anyway. 754 */ 755 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) { 756 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid, 757 VFS_I(ip)->i_gid, fa->fsx_projid, 758 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp); 759 if (error) 760 return error; 761 } 762 763 xfs_ioctl_setattr_prepare_dax(ip, fa); 764 765 tp = xfs_ioctl_setattr_get_trans(ip, pdqp); 766 if (IS_ERR(tp)) { 767 error = PTR_ERR(tp); 768 goto error_free_dquots; 769 } 770 771 error = xfs_ioctl_setattr_check_extsize(ip, fa); 772 if (error) 773 goto error_trans_cancel; 774 775 error = xfs_ioctl_setattr_check_cowextsize(ip, fa); 776 if (error) 777 goto error_trans_cancel; 778 779 error = xfs_ioctl_setattr_xflags(tp, ip, fa); 780 if (error) 781 goto error_trans_cancel; 782 783 if (!fa->fsx_valid) 784 goto skip_xattr; 785 /* 786 * Change file ownership. Must be the owner or privileged. CAP_FSETID 787 * overrides the following restrictions: 788 * 789 * The set-user-ID and set-group-ID bits of a file will be cleared upon 790 * successful return from chown() 791 */ 792 793 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 794 !capable_wrt_inode_uidgid(idmap, VFS_I(ip), CAP_FSETID)) 795 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 796 797 /* Change the ownerships and register project quota modifications */ 798 if (ip->i_projid != fa->fsx_projid) { 799 if (XFS_IS_PQUOTA_ON(mp)) { 800 olddquot = xfs_qm_vop_chown(tp, ip, 801 &ip->i_pdquot, pdqp); 802 } 803 ip->i_projid = fa->fsx_projid; 804 } 805 806 /* 807 * Only set the extent size hint if we've already determined that the 808 * extent size hint should be set on the inode. If no extent size flags 809 * are set on the inode then unconditionally clear the extent size hint. 810 */ 811 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 812 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize); 813 else 814 ip->i_extsize = 0; 815 816 if (xfs_has_v3inodes(mp)) { 817 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) 818 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 819 else 820 ip->i_cowextsize = 0; 821 } 822 823 skip_xattr: 824 error = xfs_trans_commit(tp); 825 826 /* 827 * Release any dquot(s) the inode had kept before chown. 828 */ 829 xfs_qm_dqrele(olddquot); 830 xfs_qm_dqrele(pdqp); 831 832 return error; 833 834 error_trans_cancel: 835 xfs_trans_cancel(tp); 836 error_free_dquots: 837 xfs_qm_dqrele(pdqp); 838 return error; 839 } 840 841 static bool 842 xfs_getbmap_format( 843 struct kgetbmap *p, 844 struct getbmapx __user *u, 845 size_t recsize) 846 { 847 if (put_user(p->bmv_offset, &u->bmv_offset) || 848 put_user(p->bmv_block, &u->bmv_block) || 849 put_user(p->bmv_length, &u->bmv_length) || 850 put_user(0, &u->bmv_count) || 851 put_user(0, &u->bmv_entries)) 852 return false; 853 if (recsize < sizeof(struct getbmapx)) 854 return true; 855 if (put_user(0, &u->bmv_iflags) || 856 put_user(p->bmv_oflags, &u->bmv_oflags) || 857 put_user(0, &u->bmv_unused1) || 858 put_user(0, &u->bmv_unused2)) 859 return false; 860 return true; 861 } 862 863 STATIC int 864 xfs_ioc_getbmap( 865 struct file *file, 866 unsigned int cmd, 867 void __user *arg) 868 { 869 struct getbmapx bmx = { 0 }; 870 struct kgetbmap *buf; 871 size_t recsize; 872 int error, i; 873 874 switch (cmd) { 875 case XFS_IOC_GETBMAPA: 876 bmx.bmv_iflags = BMV_IF_ATTRFORK; 877 fallthrough; 878 case XFS_IOC_GETBMAP: 879 /* struct getbmap is a strict subset of struct getbmapx. */ 880 recsize = sizeof(struct getbmap); 881 break; 882 case XFS_IOC_GETBMAPX: 883 recsize = sizeof(struct getbmapx); 884 break; 885 default: 886 return -EINVAL; 887 } 888 889 if (copy_from_user(&bmx, arg, recsize)) 890 return -EFAULT; 891 892 if (bmx.bmv_count < 2) 893 return -EINVAL; 894 if (bmx.bmv_count >= INT_MAX / recsize) 895 return -ENOMEM; 896 897 buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL); 898 if (!buf) 899 return -ENOMEM; 900 901 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 902 if (error) 903 goto out_free_buf; 904 905 error = -EFAULT; 906 if (copy_to_user(arg, &bmx, recsize)) 907 goto out_free_buf; 908 arg += recsize; 909 910 for (i = 0; i < bmx.bmv_entries; i++) { 911 if (!xfs_getbmap_format(buf + i, arg, recsize)) 912 goto out_free_buf; 913 arg += recsize; 914 } 915 916 error = 0; 917 out_free_buf: 918 kvfree(buf); 919 return error; 920 } 921 922 int 923 xfs_ioc_swapext( 924 xfs_swapext_t *sxp) 925 { 926 xfs_inode_t *ip, *tip; 927 928 /* Pull information for the target fd */ 929 CLASS(fd, f)((int)sxp->sx_fdtarget); 930 if (fd_empty(f)) 931 return -EINVAL; 932 933 if (!(fd_file(f)->f_mode & FMODE_WRITE) || 934 !(fd_file(f)->f_mode & FMODE_READ) || 935 (fd_file(f)->f_flags & O_APPEND)) 936 return -EBADF; 937 938 CLASS(fd, tmp)((int)sxp->sx_fdtmp); 939 if (fd_empty(tmp)) 940 return -EINVAL; 941 942 if (!(fd_file(tmp)->f_mode & FMODE_WRITE) || 943 !(fd_file(tmp)->f_mode & FMODE_READ) || 944 (fd_file(tmp)->f_flags & O_APPEND)) 945 return -EBADF; 946 947 if (IS_SWAPFILE(file_inode(fd_file(f))) || 948 IS_SWAPFILE(file_inode(fd_file(tmp)))) 949 return -EINVAL; 950 951 /* 952 * We need to ensure that the fds passed in point to XFS inodes 953 * before we cast and access them as XFS structures as we have no 954 * control over what the user passes us here. 955 */ 956 if (fd_file(f)->f_op != &xfs_file_operations || 957 fd_file(tmp)->f_op != &xfs_file_operations) 958 return -EINVAL; 959 960 ip = XFS_I(file_inode(fd_file(f))); 961 tip = XFS_I(file_inode(fd_file(tmp))); 962 963 if (ip->i_mount != tip->i_mount) 964 return -EINVAL; 965 966 if (ip->i_ino == tip->i_ino) 967 return -EINVAL; 968 969 if (xfs_is_shutdown(ip->i_mount)) 970 return -EIO; 971 972 return xfs_swap_extents(ip, tip, sxp); 973 } 974 975 static int 976 xfs_ioc_getlabel( 977 struct xfs_mount *mp, 978 char __user *user_label) 979 { 980 struct xfs_sb *sbp = &mp->m_sb; 981 char label[XFSLABEL_MAX + 1]; 982 983 /* Paranoia */ 984 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 985 986 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 987 spin_lock(&mp->m_sb_lock); 988 memtostr_pad(label, sbp->sb_fname); 989 spin_unlock(&mp->m_sb_lock); 990 991 if (copy_to_user(user_label, label, sizeof(label))) 992 return -EFAULT; 993 return 0; 994 } 995 996 static int 997 xfs_ioc_setlabel( 998 struct file *filp, 999 struct xfs_mount *mp, 1000 char __user *newlabel) 1001 { 1002 struct xfs_sb *sbp = &mp->m_sb; 1003 char label[XFSLABEL_MAX + 1]; 1004 size_t len; 1005 int error; 1006 1007 if (!capable(CAP_SYS_ADMIN)) 1008 return -EPERM; 1009 /* 1010 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 1011 * smaller, at 12 bytes. We copy one more to be sure we find the 1012 * (required) NULL character to test the incoming label length. 1013 * NB: The on disk label doesn't need to be null terminated. 1014 */ 1015 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 1016 return -EFAULT; 1017 len = strnlen(label, XFSLABEL_MAX + 1); 1018 if (len > sizeof(sbp->sb_fname)) 1019 return -EINVAL; 1020 1021 error = mnt_want_write_file(filp); 1022 if (error) 1023 return error; 1024 1025 spin_lock(&mp->m_sb_lock); 1026 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 1027 memcpy(sbp->sb_fname, label, len); 1028 spin_unlock(&mp->m_sb_lock); 1029 1030 /* 1031 * Now we do several things to satisfy userspace. 1032 * In addition to normal logging of the primary superblock, we also 1033 * immediately write these changes to sector zero for the primary, then 1034 * update all backup supers (as xfs_db does for a label change), then 1035 * invalidate the block device page cache. This is so that any prior 1036 * buffered reads from userspace (i.e. from blkid) are invalidated, 1037 * and userspace will see the newly-written label. 1038 */ 1039 error = xfs_sync_sb_buf(mp, true); 1040 if (error) 1041 goto out; 1042 /* 1043 * growfs also updates backup supers so lock against that. 1044 */ 1045 mutex_lock(&mp->m_growlock); 1046 error = xfs_update_secondary_sbs(mp); 1047 mutex_unlock(&mp->m_growlock); 1048 1049 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 1050 if (xfs_has_rtsb(mp) && mp->m_rtdev_targp) 1051 invalidate_bdev(mp->m_rtdev_targp->bt_bdev); 1052 1053 out: 1054 mnt_drop_write_file(filp); 1055 return error; 1056 } 1057 1058 static inline int 1059 xfs_fs_eofblocks_from_user( 1060 struct xfs_fs_eofblocks *src, 1061 struct xfs_icwalk *dst) 1062 { 1063 if (src->eof_version != XFS_EOFBLOCKS_VERSION) 1064 return -EINVAL; 1065 1066 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID) 1067 return -EINVAL; 1068 1069 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) || 1070 memchr_inv(src->pad64, 0, sizeof(src->pad64))) 1071 return -EINVAL; 1072 1073 dst->icw_flags = 0; 1074 if (src->eof_flags & XFS_EOF_FLAGS_SYNC) 1075 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC; 1076 if (src->eof_flags & XFS_EOF_FLAGS_UID) 1077 dst->icw_flags |= XFS_ICWALK_FLAG_UID; 1078 if (src->eof_flags & XFS_EOF_FLAGS_GID) 1079 dst->icw_flags |= XFS_ICWALK_FLAG_GID; 1080 if (src->eof_flags & XFS_EOF_FLAGS_PRID) 1081 dst->icw_flags |= XFS_ICWALK_FLAG_PRID; 1082 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE) 1083 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE; 1084 1085 dst->icw_prid = src->eof_prid; 1086 dst->icw_min_file_size = src->eof_min_file_size; 1087 1088 dst->icw_uid = INVALID_UID; 1089 if (src->eof_flags & XFS_EOF_FLAGS_UID) { 1090 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid); 1091 if (!uid_valid(dst->icw_uid)) 1092 return -EINVAL; 1093 } 1094 1095 dst->icw_gid = INVALID_GID; 1096 if (src->eof_flags & XFS_EOF_FLAGS_GID) { 1097 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid); 1098 if (!gid_valid(dst->icw_gid)) 1099 return -EINVAL; 1100 } 1101 return 0; 1102 } 1103 1104 static int 1105 xfs_ioctl_getset_resblocks( 1106 struct file *filp, 1107 unsigned int cmd, 1108 void __user *arg) 1109 { 1110 struct xfs_mount *mp = XFS_I(file_inode(filp))->i_mount; 1111 struct xfs_fsop_resblks fsop = { }; 1112 int error; 1113 1114 if (!capable(CAP_SYS_ADMIN)) 1115 return -EPERM; 1116 1117 if (cmd == XFS_IOC_SET_RESBLKS) { 1118 if (xfs_is_readonly(mp)) 1119 return -EROFS; 1120 1121 if (copy_from_user(&fsop, arg, sizeof(fsop))) 1122 return -EFAULT; 1123 1124 error = mnt_want_write_file(filp); 1125 if (error) 1126 return error; 1127 error = xfs_reserve_blocks(mp, XC_FREE_BLOCKS, fsop.resblks); 1128 mnt_drop_write_file(filp); 1129 if (error) 1130 return error; 1131 } 1132 1133 spin_lock(&mp->m_sb_lock); 1134 fsop.resblks = mp->m_free[XC_FREE_BLOCKS].res_total; 1135 fsop.resblks_avail = mp->m_free[XC_FREE_BLOCKS].res_avail; 1136 spin_unlock(&mp->m_sb_lock); 1137 1138 if (copy_to_user(arg, &fsop, sizeof(fsop))) 1139 return -EFAULT; 1140 return 0; 1141 } 1142 1143 static int 1144 xfs_ioctl_fs_counts( 1145 struct xfs_mount *mp, 1146 struct xfs_fsop_counts __user *uarg) 1147 { 1148 struct xfs_fsop_counts out = { 1149 .allocino = percpu_counter_read_positive(&mp->m_icount), 1150 .freeino = percpu_counter_read_positive(&mp->m_ifree), 1151 .freedata = xfs_estimate_freecounter(mp, XC_FREE_BLOCKS) - 1152 xfs_freecounter_unavailable(mp, XC_FREE_BLOCKS), 1153 .freertx = xfs_estimate_freecounter(mp, XC_FREE_RTEXTENTS), 1154 }; 1155 1156 if (copy_to_user(uarg, &out, sizeof(out))) 1157 return -EFAULT; 1158 return 0; 1159 } 1160 1161 /* 1162 * These long-unused ioctls were removed from the official ioctl API in 5.17, 1163 * but retain these definitions so that we can log warnings about them. 1164 */ 1165 #define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64) 1166 #define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64) 1167 #define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64) 1168 #define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64) 1169 1170 /* 1171 * Note: some of the ioctl's return positive numbers as a 1172 * byte count indicating success, such as readlink_by_handle. 1173 * So we don't "sign flip" like most other routines. This means 1174 * true errors need to be returned as a negative value. 1175 */ 1176 long 1177 xfs_file_ioctl( 1178 struct file *filp, 1179 unsigned int cmd, 1180 unsigned long p) 1181 { 1182 struct inode *inode = file_inode(filp); 1183 struct xfs_inode *ip = XFS_I(inode); 1184 struct xfs_mount *mp = ip->i_mount; 1185 void __user *arg = (void __user *)p; 1186 int error; 1187 1188 trace_xfs_file_ioctl(ip); 1189 1190 switch (cmd) { 1191 case FITRIM: 1192 return xfs_ioc_trim(mp, arg); 1193 case FS_IOC_GETFSLABEL: 1194 return xfs_ioc_getlabel(mp, arg); 1195 case FS_IOC_SETFSLABEL: 1196 return xfs_ioc_setlabel(filp, mp, arg); 1197 case XFS_IOC_ALLOCSP: 1198 case XFS_IOC_FREESP: 1199 case XFS_IOC_ALLOCSP64: 1200 case XFS_IOC_FREESP64: 1201 xfs_warn_once(mp, 1202 "%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported", 1203 current->comm); 1204 return -ENOTTY; 1205 case XFS_IOC_DIOINFO: { 1206 struct kstat st; 1207 struct dioattr da; 1208 1209 error = vfs_getattr(&filp->f_path, &st, STATX_DIOALIGN, 0); 1210 if (error) 1211 return error; 1212 1213 /* 1214 * Some userspace directly feeds the return value to 1215 * posix_memalign, which fails for values that are smaller than 1216 * the pointer size. Round up the value to not break userspace. 1217 */ 1218 da.d_mem = roundup(st.dio_mem_align, sizeof(void *)); 1219 da.d_miniosz = st.dio_offset_align; 1220 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1221 if (copy_to_user(arg, &da, sizeof(da))) 1222 return -EFAULT; 1223 return 0; 1224 } 1225 1226 case XFS_IOC_FSBULKSTAT_SINGLE: 1227 case XFS_IOC_FSBULKSTAT: 1228 case XFS_IOC_FSINUMBERS: 1229 return xfs_ioc_fsbulkstat(filp, cmd, arg); 1230 1231 case XFS_IOC_BULKSTAT: 1232 return xfs_ioc_bulkstat(filp, cmd, arg); 1233 case XFS_IOC_INUMBERS: 1234 return xfs_ioc_inumbers(mp, cmd, arg); 1235 1236 case XFS_IOC_FSGEOMETRY_V1: 1237 return xfs_ioc_fsgeometry(mp, arg, 3); 1238 case XFS_IOC_FSGEOMETRY_V4: 1239 return xfs_ioc_fsgeometry(mp, arg, 4); 1240 case XFS_IOC_FSGEOMETRY: 1241 return xfs_ioc_fsgeometry(mp, arg, 5); 1242 1243 case XFS_IOC_AG_GEOMETRY: 1244 return xfs_ioc_ag_geometry(mp, arg); 1245 case XFS_IOC_RTGROUP_GEOMETRY: 1246 return xfs_ioc_rtgroup_geometry(mp, arg); 1247 1248 case XFS_IOC_GETVERSION: 1249 return put_user(inode->i_generation, (int __user *)arg); 1250 1251 case XFS_IOC_FSGETXATTRA: 1252 return xfs_ioc_fsgetxattra(ip, arg); 1253 case XFS_IOC_GETPARENTS: 1254 return xfs_ioc_getparents(filp, arg); 1255 case XFS_IOC_GETPARENTS_BY_HANDLE: 1256 return xfs_ioc_getparents_by_handle(filp, arg); 1257 case XFS_IOC_GETBMAP: 1258 case XFS_IOC_GETBMAPA: 1259 case XFS_IOC_GETBMAPX: 1260 return xfs_ioc_getbmap(filp, cmd, arg); 1261 1262 case FS_IOC_GETFSMAP: 1263 return xfs_ioc_getfsmap(ip, arg); 1264 1265 case XFS_IOC_SCRUBV_METADATA: 1266 return xfs_ioc_scrubv_metadata(filp, arg); 1267 case XFS_IOC_SCRUB_METADATA: 1268 return xfs_ioc_scrub_metadata(filp, arg); 1269 1270 case XFS_IOC_FD_TO_HANDLE: 1271 case XFS_IOC_PATH_TO_HANDLE: 1272 case XFS_IOC_PATH_TO_FSHANDLE: { 1273 xfs_fsop_handlereq_t hreq; 1274 1275 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1276 return -EFAULT; 1277 return xfs_find_handle(cmd, &hreq); 1278 } 1279 case XFS_IOC_OPEN_BY_HANDLE: { 1280 xfs_fsop_handlereq_t hreq; 1281 1282 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1283 return -EFAULT; 1284 return xfs_open_by_handle(filp, &hreq); 1285 } 1286 1287 case XFS_IOC_READLINK_BY_HANDLE: { 1288 xfs_fsop_handlereq_t hreq; 1289 1290 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1291 return -EFAULT; 1292 return xfs_readlink_by_handle(filp, &hreq); 1293 } 1294 case XFS_IOC_ATTRLIST_BY_HANDLE: 1295 return xfs_attrlist_by_handle(filp, arg); 1296 1297 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1298 return xfs_attrmulti_by_handle(filp, arg); 1299 1300 case XFS_IOC_SWAPEXT: { 1301 struct xfs_swapext sxp; 1302 1303 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1304 return -EFAULT; 1305 error = mnt_want_write_file(filp); 1306 if (error) 1307 return error; 1308 error = xfs_ioc_swapext(&sxp); 1309 mnt_drop_write_file(filp); 1310 return error; 1311 } 1312 1313 case XFS_IOC_FSCOUNTS: 1314 return xfs_ioctl_fs_counts(mp, arg); 1315 1316 case XFS_IOC_SET_RESBLKS: 1317 case XFS_IOC_GET_RESBLKS: 1318 return xfs_ioctl_getset_resblocks(filp, cmd, arg); 1319 1320 case XFS_IOC_FSGROWFSDATA: { 1321 struct xfs_growfs_data in; 1322 1323 if (copy_from_user(&in, arg, sizeof(in))) 1324 return -EFAULT; 1325 1326 error = mnt_want_write_file(filp); 1327 if (error) 1328 return error; 1329 error = xfs_growfs_data(mp, &in); 1330 mnt_drop_write_file(filp); 1331 return error; 1332 } 1333 1334 case XFS_IOC_FSGROWFSLOG: { 1335 struct xfs_growfs_log in; 1336 1337 if (copy_from_user(&in, arg, sizeof(in))) 1338 return -EFAULT; 1339 1340 error = mnt_want_write_file(filp); 1341 if (error) 1342 return error; 1343 error = xfs_growfs_log(mp, &in); 1344 mnt_drop_write_file(filp); 1345 return error; 1346 } 1347 1348 case XFS_IOC_FSGROWFSRT: { 1349 xfs_growfs_rt_t in; 1350 1351 if (copy_from_user(&in, arg, sizeof(in))) 1352 return -EFAULT; 1353 1354 error = mnt_want_write_file(filp); 1355 if (error) 1356 return error; 1357 error = xfs_growfs_rt(mp, &in); 1358 mnt_drop_write_file(filp); 1359 return error; 1360 } 1361 1362 case XFS_IOC_GOINGDOWN: { 1363 uint32_t in; 1364 1365 if (!capable(CAP_SYS_ADMIN)) 1366 return -EPERM; 1367 1368 if (get_user(in, (uint32_t __user *)arg)) 1369 return -EFAULT; 1370 1371 return xfs_fs_goingdown(mp, in); 1372 } 1373 1374 case XFS_IOC_ERROR_INJECTION: { 1375 xfs_error_injection_t in; 1376 1377 if (!capable(CAP_SYS_ADMIN)) 1378 return -EPERM; 1379 1380 if (copy_from_user(&in, arg, sizeof(in))) 1381 return -EFAULT; 1382 1383 return xfs_errortag_add(mp, in.errtag); 1384 } 1385 1386 case XFS_IOC_ERROR_CLEARALL: 1387 if (!capable(CAP_SYS_ADMIN)) 1388 return -EPERM; 1389 1390 return xfs_errortag_clearall(mp); 1391 1392 case XFS_IOC_FREE_EOFBLOCKS: { 1393 struct xfs_fs_eofblocks eofb; 1394 struct xfs_icwalk icw; 1395 1396 if (!capable(CAP_SYS_ADMIN)) 1397 return -EPERM; 1398 1399 if (xfs_is_readonly(mp)) 1400 return -EROFS; 1401 1402 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1403 return -EFAULT; 1404 1405 error = xfs_fs_eofblocks_from_user(&eofb, &icw); 1406 if (error) 1407 return error; 1408 1409 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_); 1410 1411 sb_start_write(mp->m_super); 1412 error = xfs_blockgc_free_space(mp, &icw); 1413 sb_end_write(mp->m_super); 1414 return error; 1415 } 1416 1417 case XFS_IOC_EXCHANGE_RANGE: 1418 return xfs_ioc_exchange_range(filp, arg); 1419 case XFS_IOC_START_COMMIT: 1420 return xfs_ioc_start_commit(filp, arg); 1421 case XFS_IOC_COMMIT_RANGE: 1422 return xfs_ioc_commit_range(filp, arg); 1423 1424 default: 1425 return -ENOTTY; 1426 } 1427 } 1428