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->flags |= XFS_IBULK_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 fileattr *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 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize); 474 fa->fsx_projid = ip->i_projid; 475 if (ifp && !xfs_need_iread_extents(ifp)) 476 fa->fsx_nextents = xfs_iext_count(ifp); 477 else 478 fa->fsx_nextents = xfs_ifork_nextents(ifp); 479 } 480 481 STATIC int 482 xfs_ioc_fsgetxattra( 483 xfs_inode_t *ip, 484 void __user *arg) 485 { 486 struct fileattr fa; 487 488 xfs_ilock(ip, XFS_ILOCK_SHARED); 489 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa); 490 xfs_iunlock(ip, XFS_ILOCK_SHARED); 491 492 return copy_fsxattr_to_user(&fa, arg); 493 } 494 495 int 496 xfs_fileattr_get( 497 struct dentry *dentry, 498 struct fileattr *fa) 499 { 500 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 501 502 if (d_is_special(dentry)) 503 return -ENOTTY; 504 505 xfs_ilock(ip, XFS_ILOCK_SHARED); 506 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa); 507 xfs_iunlock(ip, XFS_ILOCK_SHARED); 508 509 return 0; 510 } 511 512 static int 513 xfs_ioctl_setattr_xflags( 514 struct xfs_trans *tp, 515 struct xfs_inode *ip, 516 struct fileattr *fa) 517 { 518 struct xfs_mount *mp = ip->i_mount; 519 bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME); 520 uint64_t i_flags2; 521 522 if (rtflag != XFS_IS_REALTIME_INODE(ip)) { 523 /* Can't change realtime flag if any extents are allocated. */ 524 if (xfs_inode_has_filedata(ip)) 525 return -EINVAL; 526 527 /* 528 * If S_DAX is enabled on this file, we can only switch the 529 * device if both support fsdax. We can't update S_DAX because 530 * there might be other threads walking down the access paths. 531 */ 532 if (IS_DAX(VFS_I(ip)) && 533 (mp->m_ddev_targp->bt_daxdev == NULL || 534 (mp->m_rtdev_targp && 535 mp->m_rtdev_targp->bt_daxdev == NULL))) 536 return -EINVAL; 537 } 538 539 if (rtflag) { 540 /* If realtime flag is set then must have realtime device */ 541 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 542 xfs_extlen_to_rtxmod(mp, ip->i_extsize)) 543 return -EINVAL; 544 545 /* Clear reflink if we are actually able to set the rt flag. */ 546 if (xfs_is_reflink_inode(ip)) 547 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK; 548 } 549 550 /* diflags2 only valid for v3 inodes. */ 551 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 552 if (i_flags2 && !xfs_has_v3inodes(mp)) 553 return -EINVAL; 554 555 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 556 ip->i_diflags2 = i_flags2; 557 558 xfs_diflags_to_iflags(ip, false); 559 560 /* 561 * Make the stable writes flag match that of the device the inode 562 * resides on when flipping the RT flag. 563 */ 564 if (rtflag != XFS_IS_REALTIME_INODE(ip) && S_ISREG(VFS_I(ip)->i_mode)) 565 xfs_update_stable_writes(ip); 566 567 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 568 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 569 XFS_STATS_INC(mp, xs_ig_attrchg); 570 return 0; 571 } 572 573 static void 574 xfs_ioctl_setattr_prepare_dax( 575 struct xfs_inode *ip, 576 struct fileattr *fa) 577 { 578 struct xfs_mount *mp = ip->i_mount; 579 struct inode *inode = VFS_I(ip); 580 581 if (S_ISDIR(inode->i_mode)) 582 return; 583 584 if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp)) 585 return; 586 587 if (((fa->fsx_xflags & FS_XFLAG_DAX) && 588 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) || 589 (!(fa->fsx_xflags & FS_XFLAG_DAX) && 590 (ip->i_diflags2 & XFS_DIFLAG2_DAX))) 591 d_mark_dontcache(inode); 592 } 593 594 /* 595 * Set up the transaction structure for the setattr operation, checking that we 596 * have permission to do so. On success, return a clean transaction and the 597 * inode locked exclusively ready for further operation specific checks. On 598 * failure, return an error without modifying or locking the inode. 599 */ 600 static struct xfs_trans * 601 xfs_ioctl_setattr_get_trans( 602 struct xfs_inode *ip, 603 struct xfs_dquot *pdqp) 604 { 605 struct xfs_mount *mp = ip->i_mount; 606 struct xfs_trans *tp; 607 int error = -EROFS; 608 609 if (xfs_is_readonly(mp)) 610 goto out_error; 611 error = -EIO; 612 if (xfs_is_shutdown(mp)) 613 goto out_error; 614 615 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp, 616 has_capability_noaudit(current, CAP_FOWNER), &tp); 617 if (error) 618 goto out_error; 619 620 if (xfs_has_wsync(mp)) 621 xfs_trans_set_sync(tp); 622 623 return tp; 624 625 out_error: 626 return ERR_PTR(error); 627 } 628 629 /* 630 * Validate a proposed extent size hint. For regular files, the hint can only 631 * be changed if no extents are allocated. 632 */ 633 static int 634 xfs_ioctl_setattr_check_extsize( 635 struct xfs_inode *ip, 636 struct fileattr *fa) 637 { 638 struct xfs_mount *mp = ip->i_mount; 639 xfs_failaddr_t failaddr; 640 uint16_t new_diflags; 641 642 if (!fa->fsx_valid) 643 return 0; 644 645 if (S_ISREG(VFS_I(ip)->i_mode) && xfs_inode_has_filedata(ip) && 646 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize) 647 return -EINVAL; 648 649 if (fa->fsx_extsize & mp->m_blockmask) 650 return -EINVAL; 651 652 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 653 654 /* 655 * Inode verifiers do not check that the extent size hint is an integer 656 * multiple of the rt extent size on a directory with both rtinherit 657 * and extszinherit flags set. Don't let sysadmins misconfigure 658 * directories. 659 */ 660 if ((new_diflags & XFS_DIFLAG_RTINHERIT) && 661 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) { 662 unsigned int rtextsize_bytes; 663 664 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize); 665 if (fa->fsx_extsize % rtextsize_bytes) 666 return -EINVAL; 667 } 668 669 failaddr = xfs_inode_validate_extsize(ip->i_mount, 670 XFS_B_TO_FSB(mp, fa->fsx_extsize), 671 VFS_I(ip)->i_mode, new_diflags); 672 return failaddr != NULL ? -EINVAL : 0; 673 } 674 675 static int 676 xfs_ioctl_setattr_check_cowextsize( 677 struct xfs_inode *ip, 678 struct fileattr *fa) 679 { 680 struct xfs_mount *mp = ip->i_mount; 681 xfs_failaddr_t failaddr; 682 uint64_t new_diflags2; 683 uint16_t new_diflags; 684 685 if (!fa->fsx_valid) 686 return 0; 687 688 if (fa->fsx_cowextsize & mp->m_blockmask) 689 return -EINVAL; 690 691 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 692 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 693 694 failaddr = xfs_inode_validate_cowextsize(ip->i_mount, 695 XFS_B_TO_FSB(mp, fa->fsx_cowextsize), 696 VFS_I(ip)->i_mode, new_diflags, new_diflags2); 697 return failaddr != NULL ? -EINVAL : 0; 698 } 699 700 static int 701 xfs_ioctl_setattr_check_projid( 702 struct xfs_inode *ip, 703 struct fileattr *fa) 704 { 705 if (!fa->fsx_valid) 706 return 0; 707 708 /* Disallow 32bit project ids if 32bit IDs are not enabled. */ 709 if (fa->fsx_projid > (uint16_t)-1 && 710 !xfs_has_projid32(ip->i_mount)) 711 return -EINVAL; 712 return 0; 713 } 714 715 int 716 xfs_fileattr_set( 717 struct mnt_idmap *idmap, 718 struct dentry *dentry, 719 struct fileattr *fa) 720 { 721 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 722 struct xfs_mount *mp = ip->i_mount; 723 struct xfs_trans *tp; 724 struct xfs_dquot *pdqp = NULL; 725 struct xfs_dquot *olddquot = NULL; 726 int error; 727 728 trace_xfs_ioctl_setattr(ip); 729 730 if (d_is_special(dentry)) 731 return -ENOTTY; 732 733 if (!fa->fsx_valid) { 734 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | 735 FS_NOATIME_FL | FS_NODUMP_FL | 736 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL)) 737 return -EOPNOTSUPP; 738 } 739 740 error = xfs_ioctl_setattr_check_projid(ip, fa); 741 if (error) 742 return error; 743 744 /* 745 * If disk quotas is on, we make sure that the dquots do exist on disk, 746 * before we start any other transactions. Trying to do this later 747 * is messy. We don't care to take a readlock to look at the ids 748 * in inode here, because we can't hold it across the trans_reserve. 749 * If the IDs do change before we take the ilock, we're covered 750 * because the i_*dquot fields will get updated anyway. 751 */ 752 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) { 753 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid, 754 VFS_I(ip)->i_gid, fa->fsx_projid, 755 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp); 756 if (error) 757 return error; 758 } 759 760 xfs_ioctl_setattr_prepare_dax(ip, fa); 761 762 tp = xfs_ioctl_setattr_get_trans(ip, pdqp); 763 if (IS_ERR(tp)) { 764 error = PTR_ERR(tp); 765 goto error_free_dquots; 766 } 767 768 error = xfs_ioctl_setattr_check_extsize(ip, fa); 769 if (error) 770 goto error_trans_cancel; 771 772 error = xfs_ioctl_setattr_check_cowextsize(ip, fa); 773 if (error) 774 goto error_trans_cancel; 775 776 error = xfs_ioctl_setattr_xflags(tp, ip, fa); 777 if (error) 778 goto error_trans_cancel; 779 780 if (!fa->fsx_valid) 781 goto skip_xattr; 782 /* 783 * Change file ownership. Must be the owner or privileged. CAP_FSETID 784 * overrides the following restrictions: 785 * 786 * The set-user-ID and set-group-ID bits of a file will be cleared upon 787 * successful return from chown() 788 */ 789 790 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 791 !capable_wrt_inode_uidgid(idmap, VFS_I(ip), CAP_FSETID)) 792 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 793 794 /* Change the ownerships and register project quota modifications */ 795 if (ip->i_projid != fa->fsx_projid) { 796 if (XFS_IS_PQUOTA_ON(mp)) { 797 olddquot = xfs_qm_vop_chown(tp, ip, 798 &ip->i_pdquot, pdqp); 799 } 800 ip->i_projid = fa->fsx_projid; 801 } 802 803 /* 804 * Only set the extent size hint if we've already determined that the 805 * extent size hint should be set on the inode. If no extent size flags 806 * are set on the inode then unconditionally clear the extent size hint. 807 */ 808 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 809 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize); 810 else 811 ip->i_extsize = 0; 812 813 if (xfs_has_v3inodes(mp)) { 814 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) 815 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 816 else 817 ip->i_cowextsize = 0; 818 } 819 820 skip_xattr: 821 error = xfs_trans_commit(tp); 822 823 /* 824 * Release any dquot(s) the inode had kept before chown. 825 */ 826 xfs_qm_dqrele(olddquot); 827 xfs_qm_dqrele(pdqp); 828 829 return error; 830 831 error_trans_cancel: 832 xfs_trans_cancel(tp); 833 error_free_dquots: 834 xfs_qm_dqrele(pdqp); 835 return error; 836 } 837 838 static bool 839 xfs_getbmap_format( 840 struct kgetbmap *p, 841 struct getbmapx __user *u, 842 size_t recsize) 843 { 844 if (put_user(p->bmv_offset, &u->bmv_offset) || 845 put_user(p->bmv_block, &u->bmv_block) || 846 put_user(p->bmv_length, &u->bmv_length) || 847 put_user(0, &u->bmv_count) || 848 put_user(0, &u->bmv_entries)) 849 return false; 850 if (recsize < sizeof(struct getbmapx)) 851 return true; 852 if (put_user(0, &u->bmv_iflags) || 853 put_user(p->bmv_oflags, &u->bmv_oflags) || 854 put_user(0, &u->bmv_unused1) || 855 put_user(0, &u->bmv_unused2)) 856 return false; 857 return true; 858 } 859 860 STATIC int 861 xfs_ioc_getbmap( 862 struct file *file, 863 unsigned int cmd, 864 void __user *arg) 865 { 866 struct getbmapx bmx = { 0 }; 867 struct kgetbmap *buf; 868 size_t recsize; 869 int error, i; 870 871 switch (cmd) { 872 case XFS_IOC_GETBMAPA: 873 bmx.bmv_iflags = BMV_IF_ATTRFORK; 874 fallthrough; 875 case XFS_IOC_GETBMAP: 876 /* struct getbmap is a strict subset of struct getbmapx. */ 877 recsize = sizeof(struct getbmap); 878 break; 879 case XFS_IOC_GETBMAPX: 880 recsize = sizeof(struct getbmapx); 881 break; 882 default: 883 return -EINVAL; 884 } 885 886 if (copy_from_user(&bmx, arg, recsize)) 887 return -EFAULT; 888 889 if (bmx.bmv_count < 2) 890 return -EINVAL; 891 if (bmx.bmv_count >= INT_MAX / recsize) 892 return -ENOMEM; 893 894 buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL); 895 if (!buf) 896 return -ENOMEM; 897 898 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 899 if (error) 900 goto out_free_buf; 901 902 error = -EFAULT; 903 if (copy_to_user(arg, &bmx, recsize)) 904 goto out_free_buf; 905 arg += recsize; 906 907 for (i = 0; i < bmx.bmv_entries; i++) { 908 if (!xfs_getbmap_format(buf + i, arg, recsize)) 909 goto out_free_buf; 910 arg += recsize; 911 } 912 913 error = 0; 914 out_free_buf: 915 kvfree(buf); 916 return error; 917 } 918 919 int 920 xfs_ioc_swapext( 921 xfs_swapext_t *sxp) 922 { 923 xfs_inode_t *ip, *tip; 924 925 /* Pull information for the target fd */ 926 CLASS(fd, f)((int)sxp->sx_fdtarget); 927 if (fd_empty(f)) 928 return -EINVAL; 929 930 if (!(fd_file(f)->f_mode & FMODE_WRITE) || 931 !(fd_file(f)->f_mode & FMODE_READ) || 932 (fd_file(f)->f_flags & O_APPEND)) 933 return -EBADF; 934 935 CLASS(fd, tmp)((int)sxp->sx_fdtmp); 936 if (fd_empty(tmp)) 937 return -EINVAL; 938 939 if (!(fd_file(tmp)->f_mode & FMODE_WRITE) || 940 !(fd_file(tmp)->f_mode & FMODE_READ) || 941 (fd_file(tmp)->f_flags & O_APPEND)) 942 return -EBADF; 943 944 if (IS_SWAPFILE(file_inode(fd_file(f))) || 945 IS_SWAPFILE(file_inode(fd_file(tmp)))) 946 return -EINVAL; 947 948 /* 949 * We need to ensure that the fds passed in point to XFS inodes 950 * before we cast and access them as XFS structures as we have no 951 * control over what the user passes us here. 952 */ 953 if (fd_file(f)->f_op != &xfs_file_operations || 954 fd_file(tmp)->f_op != &xfs_file_operations) 955 return -EINVAL; 956 957 ip = XFS_I(file_inode(fd_file(f))); 958 tip = XFS_I(file_inode(fd_file(tmp))); 959 960 if (ip->i_mount != tip->i_mount) 961 return -EINVAL; 962 963 if (ip->i_ino == tip->i_ino) 964 return -EINVAL; 965 966 if (xfs_is_shutdown(ip->i_mount)) 967 return -EIO; 968 969 return xfs_swap_extents(ip, tip, sxp); 970 } 971 972 static int 973 xfs_ioc_getlabel( 974 struct xfs_mount *mp, 975 char __user *user_label) 976 { 977 struct xfs_sb *sbp = &mp->m_sb; 978 char label[XFSLABEL_MAX + 1]; 979 980 /* Paranoia */ 981 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 982 983 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 984 memset(label, 0, sizeof(label)); 985 spin_lock(&mp->m_sb_lock); 986 strncpy(label, sbp->sb_fname, XFSLABEL_MAX); 987 spin_unlock(&mp->m_sb_lock); 988 989 if (copy_to_user(user_label, label, sizeof(label))) 990 return -EFAULT; 991 return 0; 992 } 993 994 static int 995 xfs_ioc_setlabel( 996 struct file *filp, 997 struct xfs_mount *mp, 998 char __user *newlabel) 999 { 1000 struct xfs_sb *sbp = &mp->m_sb; 1001 char label[XFSLABEL_MAX + 1]; 1002 size_t len; 1003 int error; 1004 1005 if (!capable(CAP_SYS_ADMIN)) 1006 return -EPERM; 1007 /* 1008 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 1009 * smaller, at 12 bytes. We copy one more to be sure we find the 1010 * (required) NULL character to test the incoming label length. 1011 * NB: The on disk label doesn't need to be null terminated. 1012 */ 1013 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 1014 return -EFAULT; 1015 len = strnlen(label, XFSLABEL_MAX + 1); 1016 if (len > sizeof(sbp->sb_fname)) 1017 return -EINVAL; 1018 1019 error = mnt_want_write_file(filp); 1020 if (error) 1021 return error; 1022 1023 spin_lock(&mp->m_sb_lock); 1024 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 1025 memcpy(sbp->sb_fname, label, len); 1026 spin_unlock(&mp->m_sb_lock); 1027 1028 /* 1029 * Now we do several things to satisfy userspace. 1030 * In addition to normal logging of the primary superblock, we also 1031 * immediately write these changes to sector zero for the primary, then 1032 * update all backup supers (as xfs_db does for a label change), then 1033 * invalidate the block device page cache. This is so that any prior 1034 * buffered reads from userspace (i.e. from blkid) are invalidated, 1035 * and userspace will see the newly-written label. 1036 */ 1037 error = xfs_sync_sb_buf(mp, true); 1038 if (error) 1039 goto out; 1040 /* 1041 * growfs also updates backup supers so lock against that. 1042 */ 1043 mutex_lock(&mp->m_growlock); 1044 error = xfs_update_secondary_sbs(mp); 1045 mutex_unlock(&mp->m_growlock); 1046 1047 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 1048 if (xfs_has_rtsb(mp) && mp->m_rtdev_targp) 1049 invalidate_bdev(mp->m_rtdev_targp->bt_bdev); 1050 1051 out: 1052 mnt_drop_write_file(filp); 1053 return error; 1054 } 1055 1056 static inline int 1057 xfs_fs_eofblocks_from_user( 1058 struct xfs_fs_eofblocks *src, 1059 struct xfs_icwalk *dst) 1060 { 1061 if (src->eof_version != XFS_EOFBLOCKS_VERSION) 1062 return -EINVAL; 1063 1064 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID) 1065 return -EINVAL; 1066 1067 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) || 1068 memchr_inv(src->pad64, 0, sizeof(src->pad64))) 1069 return -EINVAL; 1070 1071 dst->icw_flags = 0; 1072 if (src->eof_flags & XFS_EOF_FLAGS_SYNC) 1073 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC; 1074 if (src->eof_flags & XFS_EOF_FLAGS_UID) 1075 dst->icw_flags |= XFS_ICWALK_FLAG_UID; 1076 if (src->eof_flags & XFS_EOF_FLAGS_GID) 1077 dst->icw_flags |= XFS_ICWALK_FLAG_GID; 1078 if (src->eof_flags & XFS_EOF_FLAGS_PRID) 1079 dst->icw_flags |= XFS_ICWALK_FLAG_PRID; 1080 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE) 1081 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE; 1082 1083 dst->icw_prid = src->eof_prid; 1084 dst->icw_min_file_size = src->eof_min_file_size; 1085 1086 dst->icw_uid = INVALID_UID; 1087 if (src->eof_flags & XFS_EOF_FLAGS_UID) { 1088 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid); 1089 if (!uid_valid(dst->icw_uid)) 1090 return -EINVAL; 1091 } 1092 1093 dst->icw_gid = INVALID_GID; 1094 if (src->eof_flags & XFS_EOF_FLAGS_GID) { 1095 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid); 1096 if (!gid_valid(dst->icw_gid)) 1097 return -EINVAL; 1098 } 1099 return 0; 1100 } 1101 1102 static int 1103 xfs_ioctl_getset_resblocks( 1104 struct file *filp, 1105 unsigned int cmd, 1106 void __user *arg) 1107 { 1108 struct xfs_mount *mp = XFS_I(file_inode(filp))->i_mount; 1109 struct xfs_fsop_resblks fsop = { }; 1110 int error; 1111 1112 if (!capable(CAP_SYS_ADMIN)) 1113 return -EPERM; 1114 1115 if (cmd == XFS_IOC_SET_RESBLKS) { 1116 if (xfs_is_readonly(mp)) 1117 return -EROFS; 1118 1119 if (copy_from_user(&fsop, arg, sizeof(fsop))) 1120 return -EFAULT; 1121 1122 error = mnt_want_write_file(filp); 1123 if (error) 1124 return error; 1125 error = xfs_reserve_blocks(mp, fsop.resblks); 1126 mnt_drop_write_file(filp); 1127 if (error) 1128 return error; 1129 } 1130 1131 spin_lock(&mp->m_sb_lock); 1132 fsop.resblks = mp->m_resblks; 1133 fsop.resblks_avail = mp->m_resblks_avail; 1134 spin_unlock(&mp->m_sb_lock); 1135 1136 if (copy_to_user(arg, &fsop, sizeof(fsop))) 1137 return -EFAULT; 1138 return 0; 1139 } 1140 1141 static int 1142 xfs_ioctl_fs_counts( 1143 struct xfs_mount *mp, 1144 struct xfs_fsop_counts __user *uarg) 1145 { 1146 struct xfs_fsop_counts out = { 1147 .allocino = percpu_counter_read_positive(&mp->m_icount), 1148 .freeino = percpu_counter_read_positive(&mp->m_ifree), 1149 .freedata = percpu_counter_read_positive(&mp->m_fdblocks) - 1150 xfs_fdblocks_unavailable(mp), 1151 .freertx = percpu_counter_read_positive(&mp->m_frextents), 1152 }; 1153 1154 if (copy_to_user(uarg, &out, sizeof(out))) 1155 return -EFAULT; 1156 return 0; 1157 } 1158 1159 /* 1160 * These long-unused ioctls were removed from the official ioctl API in 5.17, 1161 * but retain these definitions so that we can log warnings about them. 1162 */ 1163 #define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64) 1164 #define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64) 1165 #define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64) 1166 #define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64) 1167 1168 /* 1169 * Note: some of the ioctl's return positive numbers as a 1170 * byte count indicating success, such as readlink_by_handle. 1171 * So we don't "sign flip" like most other routines. This means 1172 * true errors need to be returned as a negative value. 1173 */ 1174 long 1175 xfs_file_ioctl( 1176 struct file *filp, 1177 unsigned int cmd, 1178 unsigned long p) 1179 { 1180 struct inode *inode = file_inode(filp); 1181 struct xfs_inode *ip = XFS_I(inode); 1182 struct xfs_mount *mp = ip->i_mount; 1183 void __user *arg = (void __user *)p; 1184 int error; 1185 1186 trace_xfs_file_ioctl(ip); 1187 1188 switch (cmd) { 1189 case FITRIM: 1190 return xfs_ioc_trim(mp, arg); 1191 case FS_IOC_GETFSLABEL: 1192 return xfs_ioc_getlabel(mp, arg); 1193 case FS_IOC_SETFSLABEL: 1194 return xfs_ioc_setlabel(filp, mp, arg); 1195 case XFS_IOC_ALLOCSP: 1196 case XFS_IOC_FREESP: 1197 case XFS_IOC_ALLOCSP64: 1198 case XFS_IOC_FREESP64: 1199 xfs_warn_once(mp, 1200 "%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported", 1201 current->comm); 1202 return -ENOTTY; 1203 case XFS_IOC_DIOINFO: { 1204 struct xfs_buftarg *target = xfs_inode_buftarg(ip); 1205 struct dioattr da; 1206 1207 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1208 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1209 1210 if (copy_to_user(arg, &da, sizeof(da))) 1211 return -EFAULT; 1212 return 0; 1213 } 1214 1215 case XFS_IOC_FSBULKSTAT_SINGLE: 1216 case XFS_IOC_FSBULKSTAT: 1217 case XFS_IOC_FSINUMBERS: 1218 return xfs_ioc_fsbulkstat(filp, cmd, arg); 1219 1220 case XFS_IOC_BULKSTAT: 1221 return xfs_ioc_bulkstat(filp, cmd, arg); 1222 case XFS_IOC_INUMBERS: 1223 return xfs_ioc_inumbers(mp, cmd, arg); 1224 1225 case XFS_IOC_FSGEOMETRY_V1: 1226 return xfs_ioc_fsgeometry(mp, arg, 3); 1227 case XFS_IOC_FSGEOMETRY_V4: 1228 return xfs_ioc_fsgeometry(mp, arg, 4); 1229 case XFS_IOC_FSGEOMETRY: 1230 return xfs_ioc_fsgeometry(mp, arg, 5); 1231 1232 case XFS_IOC_AG_GEOMETRY: 1233 return xfs_ioc_ag_geometry(mp, arg); 1234 case XFS_IOC_RTGROUP_GEOMETRY: 1235 return xfs_ioc_rtgroup_geometry(mp, arg); 1236 1237 case XFS_IOC_GETVERSION: 1238 return put_user(inode->i_generation, (int __user *)arg); 1239 1240 case XFS_IOC_FSGETXATTRA: 1241 return xfs_ioc_fsgetxattra(ip, arg); 1242 case XFS_IOC_GETPARENTS: 1243 return xfs_ioc_getparents(filp, arg); 1244 case XFS_IOC_GETPARENTS_BY_HANDLE: 1245 return xfs_ioc_getparents_by_handle(filp, arg); 1246 case XFS_IOC_GETBMAP: 1247 case XFS_IOC_GETBMAPA: 1248 case XFS_IOC_GETBMAPX: 1249 return xfs_ioc_getbmap(filp, cmd, arg); 1250 1251 case FS_IOC_GETFSMAP: 1252 return xfs_ioc_getfsmap(ip, arg); 1253 1254 case XFS_IOC_SCRUBV_METADATA: 1255 return xfs_ioc_scrubv_metadata(filp, arg); 1256 case XFS_IOC_SCRUB_METADATA: 1257 return xfs_ioc_scrub_metadata(filp, arg); 1258 1259 case XFS_IOC_FD_TO_HANDLE: 1260 case XFS_IOC_PATH_TO_HANDLE: 1261 case XFS_IOC_PATH_TO_FSHANDLE: { 1262 xfs_fsop_handlereq_t hreq; 1263 1264 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1265 return -EFAULT; 1266 return xfs_find_handle(cmd, &hreq); 1267 } 1268 case XFS_IOC_OPEN_BY_HANDLE: { 1269 xfs_fsop_handlereq_t hreq; 1270 1271 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1272 return -EFAULT; 1273 return xfs_open_by_handle(filp, &hreq); 1274 } 1275 1276 case XFS_IOC_READLINK_BY_HANDLE: { 1277 xfs_fsop_handlereq_t hreq; 1278 1279 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1280 return -EFAULT; 1281 return xfs_readlink_by_handle(filp, &hreq); 1282 } 1283 case XFS_IOC_ATTRLIST_BY_HANDLE: 1284 return xfs_attrlist_by_handle(filp, arg); 1285 1286 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1287 return xfs_attrmulti_by_handle(filp, arg); 1288 1289 case XFS_IOC_SWAPEXT: { 1290 struct xfs_swapext sxp; 1291 1292 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1293 return -EFAULT; 1294 error = mnt_want_write_file(filp); 1295 if (error) 1296 return error; 1297 error = xfs_ioc_swapext(&sxp); 1298 mnt_drop_write_file(filp); 1299 return error; 1300 } 1301 1302 case XFS_IOC_FSCOUNTS: 1303 return xfs_ioctl_fs_counts(mp, arg); 1304 1305 case XFS_IOC_SET_RESBLKS: 1306 case XFS_IOC_GET_RESBLKS: 1307 return xfs_ioctl_getset_resblocks(filp, cmd, arg); 1308 1309 case XFS_IOC_FSGROWFSDATA: { 1310 struct xfs_growfs_data in; 1311 1312 if (copy_from_user(&in, arg, sizeof(in))) 1313 return -EFAULT; 1314 1315 error = mnt_want_write_file(filp); 1316 if (error) 1317 return error; 1318 error = xfs_growfs_data(mp, &in); 1319 mnt_drop_write_file(filp); 1320 return error; 1321 } 1322 1323 case XFS_IOC_FSGROWFSLOG: { 1324 struct xfs_growfs_log in; 1325 1326 if (copy_from_user(&in, arg, sizeof(in))) 1327 return -EFAULT; 1328 1329 error = mnt_want_write_file(filp); 1330 if (error) 1331 return error; 1332 error = xfs_growfs_log(mp, &in); 1333 mnt_drop_write_file(filp); 1334 return error; 1335 } 1336 1337 case XFS_IOC_FSGROWFSRT: { 1338 xfs_growfs_rt_t in; 1339 1340 if (copy_from_user(&in, arg, sizeof(in))) 1341 return -EFAULT; 1342 1343 error = mnt_want_write_file(filp); 1344 if (error) 1345 return error; 1346 error = xfs_growfs_rt(mp, &in); 1347 mnt_drop_write_file(filp); 1348 return error; 1349 } 1350 1351 case XFS_IOC_GOINGDOWN: { 1352 uint32_t in; 1353 1354 if (!capable(CAP_SYS_ADMIN)) 1355 return -EPERM; 1356 1357 if (get_user(in, (uint32_t __user *)arg)) 1358 return -EFAULT; 1359 1360 return xfs_fs_goingdown(mp, in); 1361 } 1362 1363 case XFS_IOC_ERROR_INJECTION: { 1364 xfs_error_injection_t in; 1365 1366 if (!capable(CAP_SYS_ADMIN)) 1367 return -EPERM; 1368 1369 if (copy_from_user(&in, arg, sizeof(in))) 1370 return -EFAULT; 1371 1372 return xfs_errortag_add(mp, in.errtag); 1373 } 1374 1375 case XFS_IOC_ERROR_CLEARALL: 1376 if (!capable(CAP_SYS_ADMIN)) 1377 return -EPERM; 1378 1379 return xfs_errortag_clearall(mp); 1380 1381 case XFS_IOC_FREE_EOFBLOCKS: { 1382 struct xfs_fs_eofblocks eofb; 1383 struct xfs_icwalk icw; 1384 1385 if (!capable(CAP_SYS_ADMIN)) 1386 return -EPERM; 1387 1388 if (xfs_is_readonly(mp)) 1389 return -EROFS; 1390 1391 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1392 return -EFAULT; 1393 1394 error = xfs_fs_eofblocks_from_user(&eofb, &icw); 1395 if (error) 1396 return error; 1397 1398 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_); 1399 1400 sb_start_write(mp->m_super); 1401 error = xfs_blockgc_free_space(mp, &icw); 1402 sb_end_write(mp->m_super); 1403 return error; 1404 } 1405 1406 case XFS_IOC_EXCHANGE_RANGE: 1407 return xfs_ioc_exchange_range(filp, arg); 1408 case XFS_IOC_START_COMMIT: 1409 return xfs_ioc_start_commit(filp, arg); 1410 case XFS_IOC_COMMIT_RANGE: 1411 return xfs_ioc_commit_range(filp, arg); 1412 1413 default: 1414 return -ENOTTY; 1415 } 1416 } 1417