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_shared.h" 21 #include "xfs_format.h" 22 #include "xfs_log_format.h" 23 #include "xfs_trans_resv.h" 24 #include "xfs_mount.h" 25 #include "xfs_inode.h" 26 #include "xfs_ioctl.h" 27 #include "xfs_alloc.h" 28 #include "xfs_rtalloc.h" 29 #include "xfs_itable.h" 30 #include "xfs_error.h" 31 #include "xfs_attr.h" 32 #include "xfs_bmap.h" 33 #include "xfs_bmap_util.h" 34 #include "xfs_fsops.h" 35 #include "xfs_discard.h" 36 #include "xfs_quota.h" 37 #include "xfs_export.h" 38 #include "xfs_trace.h" 39 #include "xfs_icache.h" 40 #include "xfs_symlink.h" 41 #include "xfs_trans.h" 42 #include "xfs_pnfs.h" 43 #include "xfs_acl.h" 44 #include "xfs_btree.h" 45 #include <linux/fsmap.h> 46 #include "xfs_fsmap.h" 47 48 #include <linux/capability.h> 49 #include <linux/cred.h> 50 #include <linux/dcache.h> 51 #include <linux/mount.h> 52 #include <linux/namei.h> 53 #include <linux/pagemap.h> 54 #include <linux/slab.h> 55 #include <linux/exportfs.h> 56 57 /* 58 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 59 * a file or fs handle. 60 * 61 * XFS_IOC_PATH_TO_FSHANDLE 62 * returns fs handle for a mount point or path within that mount point 63 * XFS_IOC_FD_TO_HANDLE 64 * returns full handle for a FD opened in user space 65 * XFS_IOC_PATH_TO_HANDLE 66 * returns full handle for a path 67 */ 68 int 69 xfs_find_handle( 70 unsigned int cmd, 71 xfs_fsop_handlereq_t *hreq) 72 { 73 int hsize; 74 xfs_handle_t handle; 75 struct inode *inode; 76 struct fd f = {NULL}; 77 struct path path; 78 int error; 79 struct xfs_inode *ip; 80 81 if (cmd == XFS_IOC_FD_TO_HANDLE) { 82 f = fdget(hreq->fd); 83 if (!f.file) 84 return -EBADF; 85 inode = file_inode(f.file); 86 } else { 87 error = user_lpath((const char __user *)hreq->path, &path); 88 if (error) 89 return error; 90 inode = d_inode(path.dentry); 91 } 92 ip = XFS_I(inode); 93 94 /* 95 * We can only generate handles for inodes residing on a XFS filesystem, 96 * and only for regular files, directories or symbolic links. 97 */ 98 error = -EINVAL; 99 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 100 goto out_put; 101 102 error = -EBADF; 103 if (!S_ISREG(inode->i_mode) && 104 !S_ISDIR(inode->i_mode) && 105 !S_ISLNK(inode->i_mode)) 106 goto out_put; 107 108 109 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 110 111 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 112 /* 113 * This handle only contains an fsid, zero the rest. 114 */ 115 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 116 hsize = sizeof(xfs_fsid_t); 117 } else { 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 = inode->i_generation; 122 handle.ha_fid.fid_ino = ip->i_ino; 123 hsize = sizeof(xfs_handle_t); 124 } 125 126 error = -EFAULT; 127 if (copy_to_user(hreq->ohandle, &handle, hsize) || 128 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 129 goto out_put; 130 131 error = 0; 132 133 out_put: 134 if (cmd == XFS_IOC_FD_TO_HANDLE) 135 fdput(f); 136 else 137 path_put(&path); 138 return error; 139 } 140 141 /* 142 * No need to do permission checks on the various pathname components 143 * as the handle operations are privileged. 144 */ 145 STATIC int 146 xfs_handle_acceptable( 147 void *context, 148 struct dentry *dentry) 149 { 150 return 1; 151 } 152 153 /* 154 * Convert userspace handle data into a dentry. 155 */ 156 struct dentry * 157 xfs_handle_to_dentry( 158 struct file *parfilp, 159 void __user *uhandle, 160 u32 hlen) 161 { 162 xfs_handle_t handle; 163 struct xfs_fid64 fid; 164 165 /* 166 * Only allow handle opens under a directory. 167 */ 168 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 169 return ERR_PTR(-ENOTDIR); 170 171 if (hlen != sizeof(xfs_handle_t)) 172 return ERR_PTR(-EINVAL); 173 if (copy_from_user(&handle, uhandle, hlen)) 174 return ERR_PTR(-EFAULT); 175 if (handle.ha_fid.fid_len != 176 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 177 return ERR_PTR(-EINVAL); 178 179 memset(&fid, 0, sizeof(struct fid)); 180 fid.ino = handle.ha_fid.fid_ino; 181 fid.gen = handle.ha_fid.fid_gen; 182 183 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 184 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 185 xfs_handle_acceptable, NULL); 186 } 187 188 STATIC struct dentry * 189 xfs_handlereq_to_dentry( 190 struct file *parfilp, 191 xfs_fsop_handlereq_t *hreq) 192 { 193 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 194 } 195 196 int 197 xfs_open_by_handle( 198 struct file *parfilp, 199 xfs_fsop_handlereq_t *hreq) 200 { 201 const struct cred *cred = current_cred(); 202 int error; 203 int fd; 204 int permflag; 205 struct file *filp; 206 struct inode *inode; 207 struct dentry *dentry; 208 fmode_t fmode; 209 struct path path; 210 211 if (!capable(CAP_SYS_ADMIN)) 212 return -EPERM; 213 214 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 215 if (IS_ERR(dentry)) 216 return PTR_ERR(dentry); 217 inode = d_inode(dentry); 218 219 /* Restrict xfs_open_by_handle to directories & regular files. */ 220 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 221 error = -EPERM; 222 goto out_dput; 223 } 224 225 #if BITS_PER_LONG != 32 226 hreq->oflags |= O_LARGEFILE; 227 #endif 228 229 permflag = hreq->oflags; 230 fmode = OPEN_FMODE(permflag); 231 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 232 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 233 error = -EPERM; 234 goto out_dput; 235 } 236 237 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 238 error = -EPERM; 239 goto out_dput; 240 } 241 242 /* Can't write directories. */ 243 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 244 error = -EISDIR; 245 goto out_dput; 246 } 247 248 fd = get_unused_fd_flags(0); 249 if (fd < 0) { 250 error = fd; 251 goto out_dput; 252 } 253 254 path.mnt = parfilp->f_path.mnt; 255 path.dentry = dentry; 256 filp = dentry_open(&path, hreq->oflags, cred); 257 dput(dentry); 258 if (IS_ERR(filp)) { 259 put_unused_fd(fd); 260 return PTR_ERR(filp); 261 } 262 263 if (S_ISREG(inode->i_mode)) { 264 filp->f_flags |= O_NOATIME; 265 filp->f_mode |= FMODE_NOCMTIME; 266 } 267 268 fd_install(fd, filp); 269 return fd; 270 271 out_dput: 272 dput(dentry); 273 return error; 274 } 275 276 int 277 xfs_readlink_by_handle( 278 struct file *parfilp, 279 xfs_fsop_handlereq_t *hreq) 280 { 281 struct dentry *dentry; 282 __u32 olen; 283 int error; 284 285 if (!capable(CAP_SYS_ADMIN)) 286 return -EPERM; 287 288 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 289 if (IS_ERR(dentry)) 290 return PTR_ERR(dentry); 291 292 /* Restrict this handle operation to symlinks only. */ 293 if (!d_is_symlink(dentry)) { 294 error = -EINVAL; 295 goto out_dput; 296 } 297 298 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 299 error = -EFAULT; 300 goto out_dput; 301 } 302 303 error = vfs_readlink(dentry, hreq->ohandle, olen); 304 305 out_dput: 306 dput(dentry); 307 return error; 308 } 309 310 int 311 xfs_set_dmattrs( 312 xfs_inode_t *ip, 313 u_int evmask, 314 u_int16_t state) 315 { 316 xfs_mount_t *mp = ip->i_mount; 317 xfs_trans_t *tp; 318 int error; 319 320 if (!capable(CAP_SYS_ADMIN)) 321 return -EPERM; 322 323 if (XFS_FORCED_SHUTDOWN(mp)) 324 return -EIO; 325 326 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 327 if (error) 328 return error; 329 330 xfs_ilock(ip, XFS_ILOCK_EXCL); 331 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 332 333 ip->i_d.di_dmevmask = evmask; 334 ip->i_d.di_dmstate = state; 335 336 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 337 error = xfs_trans_commit(tp); 338 339 return error; 340 } 341 342 STATIC int 343 xfs_fssetdm_by_handle( 344 struct file *parfilp, 345 void __user *arg) 346 { 347 int error; 348 struct fsdmidata fsd; 349 xfs_fsop_setdm_handlereq_t dmhreq; 350 struct dentry *dentry; 351 352 if (!capable(CAP_MKNOD)) 353 return -EPERM; 354 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) 355 return -EFAULT; 356 357 error = mnt_want_write_file(parfilp); 358 if (error) 359 return error; 360 361 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); 362 if (IS_ERR(dentry)) { 363 mnt_drop_write_file(parfilp); 364 return PTR_ERR(dentry); 365 } 366 367 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) { 368 error = -EPERM; 369 goto out; 370 } 371 372 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { 373 error = -EFAULT; 374 goto out; 375 } 376 377 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask, 378 fsd.fsd_dmstate); 379 380 out: 381 mnt_drop_write_file(parfilp); 382 dput(dentry); 383 return error; 384 } 385 386 STATIC int 387 xfs_attrlist_by_handle( 388 struct file *parfilp, 389 void __user *arg) 390 { 391 int error = -ENOMEM; 392 attrlist_cursor_kern_t *cursor; 393 struct xfs_fsop_attrlist_handlereq __user *p = arg; 394 xfs_fsop_attrlist_handlereq_t al_hreq; 395 struct dentry *dentry; 396 char *kbuf; 397 398 if (!capable(CAP_SYS_ADMIN)) 399 return -EPERM; 400 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 401 return -EFAULT; 402 if (al_hreq.buflen < sizeof(struct attrlist) || 403 al_hreq.buflen > XFS_XATTR_LIST_MAX) 404 return -EINVAL; 405 406 /* 407 * Reject flags, only allow namespaces. 408 */ 409 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 410 return -EINVAL; 411 412 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 413 if (IS_ERR(dentry)) 414 return PTR_ERR(dentry); 415 416 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); 417 if (!kbuf) 418 goto out_dput; 419 420 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 421 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen, 422 al_hreq.flags, cursor); 423 if (error) 424 goto out_kfree; 425 426 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) { 427 error = -EFAULT; 428 goto out_kfree; 429 } 430 431 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 432 error = -EFAULT; 433 434 out_kfree: 435 kmem_free(kbuf); 436 out_dput: 437 dput(dentry); 438 return error; 439 } 440 441 int 442 xfs_attrmulti_attr_get( 443 struct inode *inode, 444 unsigned char *name, 445 unsigned char __user *ubuf, 446 uint32_t *len, 447 uint32_t flags) 448 { 449 unsigned char *kbuf; 450 int error = -EFAULT; 451 452 if (*len > XFS_XATTR_SIZE_MAX) 453 return -EINVAL; 454 kbuf = kmem_zalloc_large(*len, KM_SLEEP); 455 if (!kbuf) 456 return -ENOMEM; 457 458 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); 459 if (error) 460 goto out_kfree; 461 462 if (copy_to_user(ubuf, kbuf, *len)) 463 error = -EFAULT; 464 465 out_kfree: 466 kmem_free(kbuf); 467 return error; 468 } 469 470 int 471 xfs_attrmulti_attr_set( 472 struct inode *inode, 473 unsigned char *name, 474 const unsigned char __user *ubuf, 475 uint32_t len, 476 uint32_t flags) 477 { 478 unsigned char *kbuf; 479 int error; 480 481 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 482 return -EPERM; 483 if (len > XFS_XATTR_SIZE_MAX) 484 return -EINVAL; 485 486 kbuf = memdup_user(ubuf, len); 487 if (IS_ERR(kbuf)) 488 return PTR_ERR(kbuf); 489 490 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 491 if (!error) 492 xfs_forget_acl(inode, name, flags); 493 kfree(kbuf); 494 return error; 495 } 496 497 int 498 xfs_attrmulti_attr_remove( 499 struct inode *inode, 500 unsigned char *name, 501 uint32_t flags) 502 { 503 int error; 504 505 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 506 return -EPERM; 507 error = xfs_attr_remove(XFS_I(inode), name, flags); 508 if (!error) 509 xfs_forget_acl(inode, name, flags); 510 return error; 511 } 512 513 STATIC int 514 xfs_attrmulti_by_handle( 515 struct file *parfilp, 516 void __user *arg) 517 { 518 int error; 519 xfs_attr_multiop_t *ops; 520 xfs_fsop_attrmulti_handlereq_t am_hreq; 521 struct dentry *dentry; 522 unsigned int i, size; 523 unsigned char *attr_name; 524 525 if (!capable(CAP_SYS_ADMIN)) 526 return -EPERM; 527 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 528 return -EFAULT; 529 530 /* overflow check */ 531 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 532 return -E2BIG; 533 534 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 535 if (IS_ERR(dentry)) 536 return PTR_ERR(dentry); 537 538 error = -E2BIG; 539 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 540 if (!size || size > 16 * PAGE_SIZE) 541 goto out_dput; 542 543 ops = memdup_user(am_hreq.ops, size); 544 if (IS_ERR(ops)) { 545 error = PTR_ERR(ops); 546 goto out_dput; 547 } 548 549 error = -ENOMEM; 550 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 551 if (!attr_name) 552 goto out_kfree_ops; 553 554 error = 0; 555 for (i = 0; i < am_hreq.opcount; i++) { 556 ops[i].am_error = strncpy_from_user((char *)attr_name, 557 ops[i].am_attrname, MAXNAMELEN); 558 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 559 error = -ERANGE; 560 if (ops[i].am_error < 0) 561 break; 562 563 switch (ops[i].am_opcode) { 564 case ATTR_OP_GET: 565 ops[i].am_error = xfs_attrmulti_attr_get( 566 d_inode(dentry), attr_name, 567 ops[i].am_attrvalue, &ops[i].am_length, 568 ops[i].am_flags); 569 break; 570 case ATTR_OP_SET: 571 ops[i].am_error = mnt_want_write_file(parfilp); 572 if (ops[i].am_error) 573 break; 574 ops[i].am_error = xfs_attrmulti_attr_set( 575 d_inode(dentry), attr_name, 576 ops[i].am_attrvalue, ops[i].am_length, 577 ops[i].am_flags); 578 mnt_drop_write_file(parfilp); 579 break; 580 case ATTR_OP_REMOVE: 581 ops[i].am_error = mnt_want_write_file(parfilp); 582 if (ops[i].am_error) 583 break; 584 ops[i].am_error = xfs_attrmulti_attr_remove( 585 d_inode(dentry), attr_name, 586 ops[i].am_flags); 587 mnt_drop_write_file(parfilp); 588 break; 589 default: 590 ops[i].am_error = -EINVAL; 591 } 592 } 593 594 if (copy_to_user(am_hreq.ops, ops, size)) 595 error = -EFAULT; 596 597 kfree(attr_name); 598 out_kfree_ops: 599 kfree(ops); 600 out_dput: 601 dput(dentry); 602 return error; 603 } 604 605 int 606 xfs_ioc_space( 607 struct file *filp, 608 unsigned int cmd, 609 xfs_flock64_t *bf) 610 { 611 struct inode *inode = file_inode(filp); 612 struct xfs_inode *ip = XFS_I(inode); 613 struct iattr iattr; 614 enum xfs_prealloc_flags flags = 0; 615 uint iolock = XFS_IOLOCK_EXCL; 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 -EPERM; 625 626 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 627 return -EPERM; 628 629 if (!(filp->f_mode & FMODE_WRITE)) 630 return -EBADF; 631 632 if (!S_ISREG(inode->i_mode)) 633 return -EINVAL; 634 635 if (filp->f_flags & O_DSYNC) 636 flags |= XFS_PREALLOC_SYNC; 637 if (filp->f_mode & FMODE_NOCMTIME) 638 flags |= XFS_PREALLOC_INVISIBLE; 639 640 error = mnt_want_write_file(filp); 641 if (error) 642 return error; 643 644 xfs_ilock(ip, iolock); 645 error = xfs_break_layouts(inode, &iolock); 646 if (error) 647 goto out_unlock; 648 649 xfs_ilock(ip, XFS_MMAPLOCK_EXCL); 650 iolock |= XFS_MMAPLOCK_EXCL; 651 652 switch (bf->l_whence) { 653 case 0: /*SEEK_SET*/ 654 break; 655 case 1: /*SEEK_CUR*/ 656 bf->l_start += filp->f_pos; 657 break; 658 case 2: /*SEEK_END*/ 659 bf->l_start += XFS_ISIZE(ip); 660 break; 661 default: 662 error = -EINVAL; 663 goto out_unlock; 664 } 665 666 /* 667 * length of <= 0 for resv/unresv/zero is invalid. length for 668 * alloc/free is ignored completely and we have no idea what userspace 669 * might have set it to, so set it to zero to allow range 670 * checks to pass. 671 */ 672 switch (cmd) { 673 case XFS_IOC_ZERO_RANGE: 674 case XFS_IOC_RESVSP: 675 case XFS_IOC_RESVSP64: 676 case XFS_IOC_UNRESVSP: 677 case XFS_IOC_UNRESVSP64: 678 if (bf->l_len <= 0) { 679 error = -EINVAL; 680 goto out_unlock; 681 } 682 break; 683 default: 684 bf->l_len = 0; 685 break; 686 } 687 688 if (bf->l_start < 0 || 689 bf->l_start > inode->i_sb->s_maxbytes || 690 bf->l_start + bf->l_len < 0 || 691 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) { 692 error = -EINVAL; 693 goto out_unlock; 694 } 695 696 switch (cmd) { 697 case XFS_IOC_ZERO_RANGE: 698 flags |= XFS_PREALLOC_SET; 699 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); 700 break; 701 case XFS_IOC_RESVSP: 702 case XFS_IOC_RESVSP64: 703 flags |= XFS_PREALLOC_SET; 704 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, 705 XFS_BMAPI_PREALLOC); 706 break; 707 case XFS_IOC_UNRESVSP: 708 case XFS_IOC_UNRESVSP64: 709 error = xfs_free_file_space(ip, bf->l_start, bf->l_len); 710 break; 711 case XFS_IOC_ALLOCSP: 712 case XFS_IOC_ALLOCSP64: 713 case XFS_IOC_FREESP: 714 case XFS_IOC_FREESP64: 715 flags |= XFS_PREALLOC_CLEAR; 716 if (bf->l_start > XFS_ISIZE(ip)) { 717 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 718 bf->l_start - XFS_ISIZE(ip), 0); 719 if (error) 720 goto out_unlock; 721 } 722 723 iattr.ia_valid = ATTR_SIZE; 724 iattr.ia_size = bf->l_start; 725 726 error = xfs_vn_setattr_size(file_dentry(filp), &iattr); 727 break; 728 default: 729 ASSERT(0); 730 error = -EINVAL; 731 } 732 733 if (error) 734 goto out_unlock; 735 736 error = xfs_update_prealloc_flags(ip, flags); 737 738 out_unlock: 739 xfs_iunlock(ip, iolock); 740 mnt_drop_write_file(filp); 741 return error; 742 } 743 744 STATIC int 745 xfs_ioc_bulkstat( 746 xfs_mount_t *mp, 747 unsigned int cmd, 748 void __user *arg) 749 { 750 xfs_fsop_bulkreq_t bulkreq; 751 int count; /* # of records returned */ 752 xfs_ino_t inlast; /* last inode number */ 753 int done; 754 int error; 755 756 /* done = 1 if there are more stats to get and if bulkstat */ 757 /* should be called again (unused here, but used in dmapi) */ 758 759 if (!capable(CAP_SYS_ADMIN)) 760 return -EPERM; 761 762 if (XFS_FORCED_SHUTDOWN(mp)) 763 return -EIO; 764 765 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) 766 return -EFAULT; 767 768 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) 769 return -EFAULT; 770 771 if ((count = bulkreq.icount) <= 0) 772 return -EINVAL; 773 774 if (bulkreq.ubuffer == NULL) 775 return -EINVAL; 776 777 if (cmd == XFS_IOC_FSINUMBERS) 778 error = xfs_inumbers(mp, &inlast, &count, 779 bulkreq.ubuffer, xfs_inumbers_fmt); 780 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) 781 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer, 782 sizeof(xfs_bstat_t), NULL, &done); 783 else /* XFS_IOC_FSBULKSTAT */ 784 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, 785 sizeof(xfs_bstat_t), bulkreq.ubuffer, 786 &done); 787 788 if (error) 789 return error; 790 791 if (bulkreq.ocount != NULL) { 792 if (copy_to_user(bulkreq.lastip, &inlast, 793 sizeof(xfs_ino_t))) 794 return -EFAULT; 795 796 if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) 797 return -EFAULT; 798 } 799 800 return 0; 801 } 802 803 STATIC int 804 xfs_ioc_fsgeometry_v1( 805 xfs_mount_t *mp, 806 void __user *arg) 807 { 808 xfs_fsop_geom_t fsgeo; 809 int error; 810 811 error = xfs_fs_geometry(mp, &fsgeo, 3); 812 if (error) 813 return error; 814 815 /* 816 * Caller should have passed an argument of type 817 * xfs_fsop_geom_v1_t. This is a proper subset of the 818 * xfs_fsop_geom_t that xfs_fs_geometry() fills in. 819 */ 820 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) 821 return -EFAULT; 822 return 0; 823 } 824 825 STATIC int 826 xfs_ioc_fsgeometry( 827 xfs_mount_t *mp, 828 void __user *arg) 829 { 830 xfs_fsop_geom_t fsgeo; 831 int error; 832 833 error = xfs_fs_geometry(mp, &fsgeo, 4); 834 if (error) 835 return error; 836 837 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) 838 return -EFAULT; 839 return 0; 840 } 841 842 /* 843 * Linux extended inode flags interface. 844 */ 845 846 STATIC unsigned int 847 xfs_merge_ioc_xflags( 848 unsigned int flags, 849 unsigned int start) 850 { 851 unsigned int xflags = start; 852 853 if (flags & FS_IMMUTABLE_FL) 854 xflags |= FS_XFLAG_IMMUTABLE; 855 else 856 xflags &= ~FS_XFLAG_IMMUTABLE; 857 if (flags & FS_APPEND_FL) 858 xflags |= FS_XFLAG_APPEND; 859 else 860 xflags &= ~FS_XFLAG_APPEND; 861 if (flags & FS_SYNC_FL) 862 xflags |= FS_XFLAG_SYNC; 863 else 864 xflags &= ~FS_XFLAG_SYNC; 865 if (flags & FS_NOATIME_FL) 866 xflags |= FS_XFLAG_NOATIME; 867 else 868 xflags &= ~FS_XFLAG_NOATIME; 869 if (flags & FS_NODUMP_FL) 870 xflags |= FS_XFLAG_NODUMP; 871 else 872 xflags &= ~FS_XFLAG_NODUMP; 873 874 return xflags; 875 } 876 877 STATIC unsigned int 878 xfs_di2lxflags( 879 uint16_t di_flags) 880 { 881 unsigned int flags = 0; 882 883 if (di_flags & XFS_DIFLAG_IMMUTABLE) 884 flags |= FS_IMMUTABLE_FL; 885 if (di_flags & XFS_DIFLAG_APPEND) 886 flags |= FS_APPEND_FL; 887 if (di_flags & XFS_DIFLAG_SYNC) 888 flags |= FS_SYNC_FL; 889 if (di_flags & XFS_DIFLAG_NOATIME) 890 flags |= FS_NOATIME_FL; 891 if (di_flags & XFS_DIFLAG_NODUMP) 892 flags |= FS_NODUMP_FL; 893 return flags; 894 } 895 896 STATIC int 897 xfs_ioc_fsgetxattr( 898 xfs_inode_t *ip, 899 int attr, 900 void __user *arg) 901 { 902 struct fsxattr fa; 903 904 memset(&fa, 0, sizeof(struct fsxattr)); 905 906 xfs_ilock(ip, XFS_ILOCK_SHARED); 907 fa.fsx_xflags = xfs_ip2xflags(ip); 908 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 909 fa.fsx_cowextsize = ip->i_d.di_cowextsize << 910 ip->i_mount->m_sb.sb_blocklog; 911 fa.fsx_projid = xfs_get_projid(ip); 912 913 if (attr) { 914 if (ip->i_afp) { 915 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 916 fa.fsx_nextents = xfs_iext_count(ip->i_afp); 917 else 918 fa.fsx_nextents = ip->i_d.di_anextents; 919 } else 920 fa.fsx_nextents = 0; 921 } else { 922 if (ip->i_df.if_flags & XFS_IFEXTENTS) 923 fa.fsx_nextents = xfs_iext_count(&ip->i_df); 924 else 925 fa.fsx_nextents = ip->i_d.di_nextents; 926 } 927 xfs_iunlock(ip, XFS_ILOCK_SHARED); 928 929 if (copy_to_user(arg, &fa, sizeof(fa))) 930 return -EFAULT; 931 return 0; 932 } 933 934 STATIC void 935 xfs_set_diflags( 936 struct xfs_inode *ip, 937 unsigned int xflags) 938 { 939 unsigned int di_flags; 940 uint64_t di_flags2; 941 942 /* can't set PREALLOC this way, just preserve it */ 943 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 944 if (xflags & FS_XFLAG_IMMUTABLE) 945 di_flags |= XFS_DIFLAG_IMMUTABLE; 946 if (xflags & FS_XFLAG_APPEND) 947 di_flags |= XFS_DIFLAG_APPEND; 948 if (xflags & FS_XFLAG_SYNC) 949 di_flags |= XFS_DIFLAG_SYNC; 950 if (xflags & FS_XFLAG_NOATIME) 951 di_flags |= XFS_DIFLAG_NOATIME; 952 if (xflags & FS_XFLAG_NODUMP) 953 di_flags |= XFS_DIFLAG_NODUMP; 954 if (xflags & FS_XFLAG_NODEFRAG) 955 di_flags |= XFS_DIFLAG_NODEFRAG; 956 if (xflags & FS_XFLAG_FILESTREAM) 957 di_flags |= XFS_DIFLAG_FILESTREAM; 958 if (S_ISDIR(VFS_I(ip)->i_mode)) { 959 if (xflags & FS_XFLAG_RTINHERIT) 960 di_flags |= XFS_DIFLAG_RTINHERIT; 961 if (xflags & FS_XFLAG_NOSYMLINKS) 962 di_flags |= XFS_DIFLAG_NOSYMLINKS; 963 if (xflags & FS_XFLAG_EXTSZINHERIT) 964 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 965 if (xflags & FS_XFLAG_PROJINHERIT) 966 di_flags |= XFS_DIFLAG_PROJINHERIT; 967 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 968 if (xflags & FS_XFLAG_REALTIME) 969 di_flags |= XFS_DIFLAG_REALTIME; 970 if (xflags & FS_XFLAG_EXTSIZE) 971 di_flags |= XFS_DIFLAG_EXTSIZE; 972 } 973 ip->i_d.di_flags = di_flags; 974 975 /* diflags2 only valid for v3 inodes. */ 976 if (ip->i_d.di_version < 3) 977 return; 978 979 di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK); 980 if (xflags & FS_XFLAG_DAX) 981 di_flags2 |= XFS_DIFLAG2_DAX; 982 if (xflags & FS_XFLAG_COWEXTSIZE) 983 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 984 985 ip->i_d.di_flags2 = di_flags2; 986 } 987 988 STATIC void 989 xfs_diflags_to_linux( 990 struct xfs_inode *ip) 991 { 992 struct inode *inode = VFS_I(ip); 993 unsigned int xflags = xfs_ip2xflags(ip); 994 995 if (xflags & FS_XFLAG_IMMUTABLE) 996 inode->i_flags |= S_IMMUTABLE; 997 else 998 inode->i_flags &= ~S_IMMUTABLE; 999 if (xflags & FS_XFLAG_APPEND) 1000 inode->i_flags |= S_APPEND; 1001 else 1002 inode->i_flags &= ~S_APPEND; 1003 if (xflags & FS_XFLAG_SYNC) 1004 inode->i_flags |= S_SYNC; 1005 else 1006 inode->i_flags &= ~S_SYNC; 1007 if (xflags & FS_XFLAG_NOATIME) 1008 inode->i_flags |= S_NOATIME; 1009 else 1010 inode->i_flags &= ~S_NOATIME; 1011 if (xflags & FS_XFLAG_DAX) 1012 inode->i_flags |= S_DAX; 1013 else 1014 inode->i_flags &= ~S_DAX; 1015 1016 } 1017 1018 static int 1019 xfs_ioctl_setattr_xflags( 1020 struct xfs_trans *tp, 1021 struct xfs_inode *ip, 1022 struct fsxattr *fa) 1023 { 1024 struct xfs_mount *mp = ip->i_mount; 1025 1026 /* Can't change realtime flag if any extents are allocated. */ 1027 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1028 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1029 return -EINVAL; 1030 1031 /* If realtime flag is set then must have realtime device */ 1032 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1033 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1034 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1035 return -EINVAL; 1036 } 1037 1038 /* Clear reflink if we are actually able to set the rt flag. */ 1039 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1040 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; 1041 1042 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1043 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1044 return -EINVAL; 1045 1046 /* 1047 * Can't modify an immutable/append-only file unless 1048 * we have appropriate permission. 1049 */ 1050 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) || 1051 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) && 1052 !capable(CAP_LINUX_IMMUTABLE)) 1053 return -EPERM; 1054 1055 xfs_set_diflags(ip, fa->fsx_xflags); 1056 xfs_diflags_to_linux(ip); 1057 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1058 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1059 XFS_STATS_INC(mp, xs_ig_attrchg); 1060 return 0; 1061 } 1062 1063 /* 1064 * If we are changing DAX flags, we have to ensure the file is clean and any 1065 * cached objects in the address space are invalidated and removed. This 1066 * requires us to lock out other IO and page faults similar to a truncate 1067 * operation. The locks need to be held until the transaction has been committed 1068 * so that the cache invalidation is atomic with respect to the DAX flag 1069 * manipulation. 1070 */ 1071 static int 1072 xfs_ioctl_setattr_dax_invalidate( 1073 struct xfs_inode *ip, 1074 struct fsxattr *fa, 1075 int *join_flags) 1076 { 1077 struct inode *inode = VFS_I(ip); 1078 int error; 1079 1080 *join_flags = 0; 1081 1082 /* 1083 * It is only valid to set the DAX flag on regular files and 1084 * directories on filesystems where the block size is equal to the page 1085 * size. On directories it serves as an inherit hint. 1086 */ 1087 if (fa->fsx_xflags & FS_XFLAG_DAX) { 1088 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) 1089 return -EINVAL; 1090 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE) 1091 return -EINVAL; 1092 } 1093 1094 /* If the DAX state is not changing, we have nothing to do here. */ 1095 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode)) 1096 return 0; 1097 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode)) 1098 return 0; 1099 1100 /* lock, flush and invalidate mapping in preparation for flag change */ 1101 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1102 error = filemap_write_and_wait(inode->i_mapping); 1103 if (error) 1104 goto out_unlock; 1105 error = invalidate_inode_pages2(inode->i_mapping); 1106 if (error) 1107 goto out_unlock; 1108 1109 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL; 1110 return 0; 1111 1112 out_unlock: 1113 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1114 return error; 1115 1116 } 1117 1118 /* 1119 * Set up the transaction structure for the setattr operation, checking that we 1120 * have permission to do so. On success, return a clean transaction and the 1121 * inode locked exclusively ready for further operation specific checks. On 1122 * failure, return an error without modifying or locking the inode. 1123 * 1124 * The inode might already be IO locked on call. If this is the case, it is 1125 * indicated in @join_flags and we take full responsibility for ensuring they 1126 * are unlocked from now on. Hence if we have an error here, we still have to 1127 * unlock them. Otherwise, once they are joined to the transaction, they will 1128 * be unlocked on commit/cancel. 1129 */ 1130 static struct xfs_trans * 1131 xfs_ioctl_setattr_get_trans( 1132 struct xfs_inode *ip, 1133 int join_flags) 1134 { 1135 struct xfs_mount *mp = ip->i_mount; 1136 struct xfs_trans *tp; 1137 int error = -EROFS; 1138 1139 if (mp->m_flags & XFS_MOUNT_RDONLY) 1140 goto out_unlock; 1141 error = -EIO; 1142 if (XFS_FORCED_SHUTDOWN(mp)) 1143 goto out_unlock; 1144 1145 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1146 if (error) 1147 return ERR_PTR(error); 1148 1149 xfs_ilock(ip, XFS_ILOCK_EXCL); 1150 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags); 1151 join_flags = 0; 1152 1153 /* 1154 * CAP_FOWNER overrides the following restrictions: 1155 * 1156 * The user ID of the calling process must be equal to the file owner 1157 * ID, except in cases where the CAP_FSETID capability is applicable. 1158 */ 1159 if (!inode_owner_or_capable(VFS_I(ip))) { 1160 error = -EPERM; 1161 goto out_cancel; 1162 } 1163 1164 if (mp->m_flags & XFS_MOUNT_WSYNC) 1165 xfs_trans_set_sync(tp); 1166 1167 return tp; 1168 1169 out_cancel: 1170 xfs_trans_cancel(tp); 1171 out_unlock: 1172 if (join_flags) 1173 xfs_iunlock(ip, join_flags); 1174 return ERR_PTR(error); 1175 } 1176 1177 /* 1178 * extent size hint validation is somewhat cumbersome. Rules are: 1179 * 1180 * 1. extent size hint is only valid for directories and regular files 1181 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1182 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1183 * 4. can only be changed on regular files if no extents are allocated 1184 * 5. can be changed on directories at any time 1185 * 6. extsize hint of 0 turns off hints, clears inode flags. 1186 * 7. Extent size must be a multiple of the appropriate block size. 1187 * 8. for non-realtime files, the extent size hint must be limited 1188 * to half the AG size to avoid alignment extending the extent beyond the 1189 * limits of the AG. 1190 */ 1191 static int 1192 xfs_ioctl_setattr_check_extsize( 1193 struct xfs_inode *ip, 1194 struct fsxattr *fa) 1195 { 1196 struct xfs_mount *mp = ip->i_mount; 1197 1198 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode)) 1199 return -EINVAL; 1200 1201 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) && 1202 !S_ISDIR(VFS_I(ip)->i_mode)) 1203 return -EINVAL; 1204 1205 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents && 1206 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1207 return -EINVAL; 1208 1209 if (fa->fsx_extsize != 0) { 1210 xfs_extlen_t size; 1211 xfs_fsblock_t extsize_fsb; 1212 1213 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1214 if (extsize_fsb > MAXEXTLEN) 1215 return -EINVAL; 1216 1217 if (XFS_IS_REALTIME_INODE(ip) || 1218 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1219 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1220 } else { 1221 size = mp->m_sb.sb_blocksize; 1222 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1223 return -EINVAL; 1224 } 1225 1226 if (fa->fsx_extsize % size) 1227 return -EINVAL; 1228 } else 1229 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT); 1230 1231 return 0; 1232 } 1233 1234 /* 1235 * CoW extent size hint validation rules are: 1236 * 1237 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1238 * The inode does not have to have any shared blocks, but it must be a v3. 1239 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1240 * for a directory, the hint is propagated to new files. 1241 * 3. Can be changed on files & directories at any time. 1242 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1243 * 5. Extent size must be a multiple of the appropriate block size. 1244 * 6. The extent size hint must be limited to half the AG size to avoid 1245 * alignment extending the extent beyond the limits of the AG. 1246 */ 1247 static int 1248 xfs_ioctl_setattr_check_cowextsize( 1249 struct xfs_inode *ip, 1250 struct fsxattr *fa) 1251 { 1252 struct xfs_mount *mp = ip->i_mount; 1253 1254 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1255 return 0; 1256 1257 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) || 1258 ip->i_d.di_version != 3) 1259 return -EINVAL; 1260 1261 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode)) 1262 return -EINVAL; 1263 1264 if (fa->fsx_cowextsize != 0) { 1265 xfs_extlen_t size; 1266 xfs_fsblock_t cowextsize_fsb; 1267 1268 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1269 if (cowextsize_fsb > MAXEXTLEN) 1270 return -EINVAL; 1271 1272 size = mp->m_sb.sb_blocksize; 1273 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1274 return -EINVAL; 1275 1276 if (fa->fsx_cowextsize % size) 1277 return -EINVAL; 1278 } else 1279 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE; 1280 1281 return 0; 1282 } 1283 1284 static int 1285 xfs_ioctl_setattr_check_projid( 1286 struct xfs_inode *ip, 1287 struct fsxattr *fa) 1288 { 1289 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1290 if (fa->fsx_projid > (uint16_t)-1 && 1291 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1292 return -EINVAL; 1293 1294 /* 1295 * Project Quota ID state is only allowed to change from within the init 1296 * namespace. Enforce that restriction only if we are trying to change 1297 * the quota ID state. Everything else is allowed in user namespaces. 1298 */ 1299 if (current_user_ns() == &init_user_ns) 1300 return 0; 1301 1302 if (xfs_get_projid(ip) != fa->fsx_projid) 1303 return -EINVAL; 1304 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) != 1305 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)) 1306 return -EINVAL; 1307 1308 return 0; 1309 } 1310 1311 STATIC int 1312 xfs_ioctl_setattr( 1313 xfs_inode_t *ip, 1314 struct fsxattr *fa) 1315 { 1316 struct xfs_mount *mp = ip->i_mount; 1317 struct xfs_trans *tp; 1318 struct xfs_dquot *udqp = NULL; 1319 struct xfs_dquot *pdqp = NULL; 1320 struct xfs_dquot *olddquot = NULL; 1321 int code; 1322 int join_flags = 0; 1323 1324 trace_xfs_ioctl_setattr(ip); 1325 1326 code = xfs_ioctl_setattr_check_projid(ip, fa); 1327 if (code) 1328 return code; 1329 1330 /* 1331 * If disk quotas is on, we make sure that the dquots do exist on disk, 1332 * before we start any other transactions. Trying to do this later 1333 * is messy. We don't care to take a readlock to look at the ids 1334 * in inode here, because we can't hold it across the trans_reserve. 1335 * If the IDs do change before we take the ilock, we're covered 1336 * because the i_*dquot fields will get updated anyway. 1337 */ 1338 if (XFS_IS_QUOTA_ON(mp)) { 1339 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1340 ip->i_d.di_gid, fa->fsx_projid, 1341 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1342 if (code) 1343 return code; 1344 } 1345 1346 /* 1347 * Changing DAX config may require inode locking for mapping 1348 * invalidation. These need to be held all the way to transaction commit 1349 * or cancel time, so need to be passed through to 1350 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1351 * appropriately. 1352 */ 1353 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags); 1354 if (code) 1355 goto error_free_dquots; 1356 1357 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1358 if (IS_ERR(tp)) { 1359 code = PTR_ERR(tp); 1360 goto error_free_dquots; 1361 } 1362 1363 1364 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1365 xfs_get_projid(ip) != fa->fsx_projid) { 1366 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1367 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1368 if (code) /* out of quota */ 1369 goto error_trans_cancel; 1370 } 1371 1372 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1373 if (code) 1374 goto error_trans_cancel; 1375 1376 code = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1377 if (code) 1378 goto error_trans_cancel; 1379 1380 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1381 if (code) 1382 goto error_trans_cancel; 1383 1384 /* 1385 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1386 * overrides the following restrictions: 1387 * 1388 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1389 * successful return from chown() 1390 */ 1391 1392 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1393 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1394 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1395 1396 /* Change the ownerships and register project quota modifications */ 1397 if (xfs_get_projid(ip) != fa->fsx_projid) { 1398 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1399 olddquot = xfs_qm_vop_chown(tp, ip, 1400 &ip->i_pdquot, pdqp); 1401 } 1402 ASSERT(ip->i_d.di_version > 1); 1403 xfs_set_projid(ip, fa->fsx_projid); 1404 } 1405 1406 /* 1407 * Only set the extent size hint if we've already determined that the 1408 * extent size hint should be set on the inode. If no extent size flags 1409 * are set on the inode then unconditionally clear the extent size hint. 1410 */ 1411 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1412 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1413 else 1414 ip->i_d.di_extsize = 0; 1415 if (ip->i_d.di_version == 3 && 1416 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) 1417 ip->i_d.di_cowextsize = fa->fsx_cowextsize >> 1418 mp->m_sb.sb_blocklog; 1419 else 1420 ip->i_d.di_cowextsize = 0; 1421 1422 code = xfs_trans_commit(tp); 1423 1424 /* 1425 * Release any dquot(s) the inode had kept before chown. 1426 */ 1427 xfs_qm_dqrele(olddquot); 1428 xfs_qm_dqrele(udqp); 1429 xfs_qm_dqrele(pdqp); 1430 1431 return code; 1432 1433 error_trans_cancel: 1434 xfs_trans_cancel(tp); 1435 error_free_dquots: 1436 xfs_qm_dqrele(udqp); 1437 xfs_qm_dqrele(pdqp); 1438 return code; 1439 } 1440 1441 STATIC int 1442 xfs_ioc_fssetxattr( 1443 xfs_inode_t *ip, 1444 struct file *filp, 1445 void __user *arg) 1446 { 1447 struct fsxattr fa; 1448 int error; 1449 1450 if (copy_from_user(&fa, arg, sizeof(fa))) 1451 return -EFAULT; 1452 1453 error = mnt_want_write_file(filp); 1454 if (error) 1455 return error; 1456 error = xfs_ioctl_setattr(ip, &fa); 1457 mnt_drop_write_file(filp); 1458 return error; 1459 } 1460 1461 STATIC int 1462 xfs_ioc_getxflags( 1463 xfs_inode_t *ip, 1464 void __user *arg) 1465 { 1466 unsigned int flags; 1467 1468 flags = xfs_di2lxflags(ip->i_d.di_flags); 1469 if (copy_to_user(arg, &flags, sizeof(flags))) 1470 return -EFAULT; 1471 return 0; 1472 } 1473 1474 STATIC int 1475 xfs_ioc_setxflags( 1476 struct xfs_inode *ip, 1477 struct file *filp, 1478 void __user *arg) 1479 { 1480 struct xfs_trans *tp; 1481 struct fsxattr fa; 1482 unsigned int flags; 1483 int join_flags = 0; 1484 int error; 1485 1486 if (copy_from_user(&flags, arg, sizeof(flags))) 1487 return -EFAULT; 1488 1489 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1490 FS_NOATIME_FL | FS_NODUMP_FL | \ 1491 FS_SYNC_FL)) 1492 return -EOPNOTSUPP; 1493 1494 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1495 1496 error = mnt_want_write_file(filp); 1497 if (error) 1498 return error; 1499 1500 /* 1501 * Changing DAX config may require inode locking for mapping 1502 * invalidation. These need to be held all the way to transaction commit 1503 * or cancel time, so need to be passed through to 1504 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1505 * appropriately. 1506 */ 1507 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags); 1508 if (error) 1509 goto out_drop_write; 1510 1511 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1512 if (IS_ERR(tp)) { 1513 error = PTR_ERR(tp); 1514 goto out_drop_write; 1515 } 1516 1517 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1518 if (error) { 1519 xfs_trans_cancel(tp); 1520 goto out_drop_write; 1521 } 1522 1523 error = xfs_trans_commit(tp); 1524 out_drop_write: 1525 mnt_drop_write_file(filp); 1526 return error; 1527 } 1528 1529 STATIC int 1530 xfs_getbmap_format(void **ap, struct getbmapx *bmv) 1531 { 1532 struct getbmap __user *base = (struct getbmap __user *)*ap; 1533 1534 /* copy only getbmap portion (not getbmapx) */ 1535 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1536 return -EFAULT; 1537 1538 *ap += sizeof(struct getbmap); 1539 return 0; 1540 } 1541 1542 STATIC int 1543 xfs_ioc_getbmap( 1544 struct file *file, 1545 unsigned int cmd, 1546 void __user *arg) 1547 { 1548 struct getbmapx bmx = { 0 }; 1549 int error; 1550 1551 /* struct getbmap is a strict subset of struct getbmapx. */ 1552 if (copy_from_user(&bmx, arg, offsetof(struct getbmapx, bmv_iflags))) 1553 return -EFAULT; 1554 1555 if (bmx.bmv_count < 2) 1556 return -EINVAL; 1557 1558 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1559 if (file->f_mode & FMODE_NOCMTIME) 1560 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1561 1562 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format, 1563 (__force struct getbmap *)arg+1); 1564 if (error) 1565 return error; 1566 1567 /* copy back header - only size of getbmap */ 1568 if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) 1569 return -EFAULT; 1570 return 0; 1571 } 1572 1573 STATIC int 1574 xfs_getbmapx_format(void **ap, struct getbmapx *bmv) 1575 { 1576 struct getbmapx __user *base = (struct getbmapx __user *)*ap; 1577 1578 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1579 return -EFAULT; 1580 1581 *ap += sizeof(struct getbmapx); 1582 return 0; 1583 } 1584 1585 STATIC int 1586 xfs_ioc_getbmapx( 1587 struct xfs_inode *ip, 1588 void __user *arg) 1589 { 1590 struct getbmapx bmx; 1591 int error; 1592 1593 if (copy_from_user(&bmx, arg, sizeof(bmx))) 1594 return -EFAULT; 1595 1596 if (bmx.bmv_count < 2) 1597 return -EINVAL; 1598 1599 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1600 return -EINVAL; 1601 1602 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1603 (__force struct getbmapx *)arg+1); 1604 if (error) 1605 return error; 1606 1607 /* copy back header */ 1608 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) 1609 return -EFAULT; 1610 1611 return 0; 1612 } 1613 1614 struct getfsmap_info { 1615 struct xfs_mount *mp; 1616 struct fsmap_head __user *data; 1617 unsigned int idx; 1618 __u32 last_flags; 1619 }; 1620 1621 STATIC int 1622 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv) 1623 { 1624 struct getfsmap_info *info = priv; 1625 struct fsmap fm; 1626 1627 trace_xfs_getfsmap_mapping(info->mp, xfm); 1628 1629 info->last_flags = xfm->fmr_flags; 1630 xfs_fsmap_from_internal(&fm, xfm); 1631 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm, 1632 sizeof(struct fsmap))) 1633 return -EFAULT; 1634 1635 return 0; 1636 } 1637 1638 STATIC int 1639 xfs_ioc_getfsmap( 1640 struct xfs_inode *ip, 1641 struct fsmap_head __user *arg) 1642 { 1643 struct getfsmap_info info = { NULL }; 1644 struct xfs_fsmap_head xhead = {0}; 1645 struct fsmap_head head; 1646 bool aborted = false; 1647 int error; 1648 1649 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1650 return -EFAULT; 1651 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1652 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1653 sizeof(head.fmh_keys[0].fmr_reserved)) || 1654 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1655 sizeof(head.fmh_keys[1].fmr_reserved))) 1656 return -EINVAL; 1657 1658 xhead.fmh_iflags = head.fmh_iflags; 1659 xhead.fmh_count = head.fmh_count; 1660 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1661 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1662 1663 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1664 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1665 1666 info.mp = ip->i_mount; 1667 info.data = arg; 1668 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info); 1669 if (error == XFS_BTREE_QUERY_RANGE_ABORT) { 1670 error = 0; 1671 aborted = true; 1672 } else if (error) 1673 return error; 1674 1675 /* If we didn't abort, set the "last" flag in the last fmx */ 1676 if (!aborted && info.idx) { 1677 info.last_flags |= FMR_OF_LAST; 1678 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags, 1679 &info.last_flags, sizeof(info.last_flags))) 1680 return -EFAULT; 1681 } 1682 1683 /* copy back header */ 1684 head.fmh_entries = xhead.fmh_entries; 1685 head.fmh_oflags = xhead.fmh_oflags; 1686 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 1687 return -EFAULT; 1688 1689 return 0; 1690 } 1691 1692 int 1693 xfs_ioc_swapext( 1694 xfs_swapext_t *sxp) 1695 { 1696 xfs_inode_t *ip, *tip; 1697 struct fd f, tmp; 1698 int error = 0; 1699 1700 /* Pull information for the target fd */ 1701 f = fdget((int)sxp->sx_fdtarget); 1702 if (!f.file) { 1703 error = -EINVAL; 1704 goto out; 1705 } 1706 1707 if (!(f.file->f_mode & FMODE_WRITE) || 1708 !(f.file->f_mode & FMODE_READ) || 1709 (f.file->f_flags & O_APPEND)) { 1710 error = -EBADF; 1711 goto out_put_file; 1712 } 1713 1714 tmp = fdget((int)sxp->sx_fdtmp); 1715 if (!tmp.file) { 1716 error = -EINVAL; 1717 goto out_put_file; 1718 } 1719 1720 if (!(tmp.file->f_mode & FMODE_WRITE) || 1721 !(tmp.file->f_mode & FMODE_READ) || 1722 (tmp.file->f_flags & O_APPEND)) { 1723 error = -EBADF; 1724 goto out_put_tmp_file; 1725 } 1726 1727 if (IS_SWAPFILE(file_inode(f.file)) || 1728 IS_SWAPFILE(file_inode(tmp.file))) { 1729 error = -EINVAL; 1730 goto out_put_tmp_file; 1731 } 1732 1733 /* 1734 * We need to ensure that the fds passed in point to XFS inodes 1735 * before we cast and access them as XFS structures as we have no 1736 * control over what the user passes us here. 1737 */ 1738 if (f.file->f_op != &xfs_file_operations || 1739 tmp.file->f_op != &xfs_file_operations) { 1740 error = -EINVAL; 1741 goto out_put_tmp_file; 1742 } 1743 1744 ip = XFS_I(file_inode(f.file)); 1745 tip = XFS_I(file_inode(tmp.file)); 1746 1747 if (ip->i_mount != tip->i_mount) { 1748 error = -EINVAL; 1749 goto out_put_tmp_file; 1750 } 1751 1752 if (ip->i_ino == tip->i_ino) { 1753 error = -EINVAL; 1754 goto out_put_tmp_file; 1755 } 1756 1757 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1758 error = -EIO; 1759 goto out_put_tmp_file; 1760 } 1761 1762 error = xfs_swap_extents(ip, tip, sxp); 1763 1764 out_put_tmp_file: 1765 fdput(tmp); 1766 out_put_file: 1767 fdput(f); 1768 out: 1769 return error; 1770 } 1771 1772 /* 1773 * Note: some of the ioctl's return positive numbers as a 1774 * byte count indicating success, such as readlink_by_handle. 1775 * So we don't "sign flip" like most other routines. This means 1776 * true errors need to be returned as a negative value. 1777 */ 1778 long 1779 xfs_file_ioctl( 1780 struct file *filp, 1781 unsigned int cmd, 1782 unsigned long p) 1783 { 1784 struct inode *inode = file_inode(filp); 1785 struct xfs_inode *ip = XFS_I(inode); 1786 struct xfs_mount *mp = ip->i_mount; 1787 void __user *arg = (void __user *)p; 1788 int error; 1789 1790 trace_xfs_file_ioctl(ip); 1791 1792 switch (cmd) { 1793 case FITRIM: 1794 return xfs_ioc_trim(mp, arg); 1795 case XFS_IOC_ALLOCSP: 1796 case XFS_IOC_FREESP: 1797 case XFS_IOC_RESVSP: 1798 case XFS_IOC_UNRESVSP: 1799 case XFS_IOC_ALLOCSP64: 1800 case XFS_IOC_FREESP64: 1801 case XFS_IOC_RESVSP64: 1802 case XFS_IOC_UNRESVSP64: 1803 case XFS_IOC_ZERO_RANGE: { 1804 xfs_flock64_t bf; 1805 1806 if (copy_from_user(&bf, arg, sizeof(bf))) 1807 return -EFAULT; 1808 return xfs_ioc_space(filp, cmd, &bf); 1809 } 1810 case XFS_IOC_DIOINFO: { 1811 struct dioattr da; 1812 xfs_buftarg_t *target = 1813 XFS_IS_REALTIME_INODE(ip) ? 1814 mp->m_rtdev_targp : mp->m_ddev_targp; 1815 1816 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1817 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1818 1819 if (copy_to_user(arg, &da, sizeof(da))) 1820 return -EFAULT; 1821 return 0; 1822 } 1823 1824 case XFS_IOC_FSBULKSTAT_SINGLE: 1825 case XFS_IOC_FSBULKSTAT: 1826 case XFS_IOC_FSINUMBERS: 1827 return xfs_ioc_bulkstat(mp, cmd, arg); 1828 1829 case XFS_IOC_FSGEOMETRY_V1: 1830 return xfs_ioc_fsgeometry_v1(mp, arg); 1831 1832 case XFS_IOC_FSGEOMETRY: 1833 return xfs_ioc_fsgeometry(mp, arg); 1834 1835 case XFS_IOC_GETVERSION: 1836 return put_user(inode->i_generation, (int __user *)arg); 1837 1838 case XFS_IOC_FSGETXATTR: 1839 return xfs_ioc_fsgetxattr(ip, 0, arg); 1840 case XFS_IOC_FSGETXATTRA: 1841 return xfs_ioc_fsgetxattr(ip, 1, arg); 1842 case XFS_IOC_FSSETXATTR: 1843 return xfs_ioc_fssetxattr(ip, filp, arg); 1844 case XFS_IOC_GETXFLAGS: 1845 return xfs_ioc_getxflags(ip, arg); 1846 case XFS_IOC_SETXFLAGS: 1847 return xfs_ioc_setxflags(ip, filp, arg); 1848 1849 case XFS_IOC_FSSETDM: { 1850 struct fsdmidata dmi; 1851 1852 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1853 return -EFAULT; 1854 1855 error = mnt_want_write_file(filp); 1856 if (error) 1857 return error; 1858 1859 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1860 dmi.fsd_dmstate); 1861 mnt_drop_write_file(filp); 1862 return error; 1863 } 1864 1865 case XFS_IOC_GETBMAP: 1866 case XFS_IOC_GETBMAPA: 1867 return xfs_ioc_getbmap(filp, cmd, arg); 1868 1869 case XFS_IOC_GETBMAPX: 1870 return xfs_ioc_getbmapx(ip, arg); 1871 1872 case FS_IOC_GETFSMAP: 1873 return xfs_ioc_getfsmap(ip, arg); 1874 1875 case XFS_IOC_FD_TO_HANDLE: 1876 case XFS_IOC_PATH_TO_HANDLE: 1877 case XFS_IOC_PATH_TO_FSHANDLE: { 1878 xfs_fsop_handlereq_t hreq; 1879 1880 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1881 return -EFAULT; 1882 return xfs_find_handle(cmd, &hreq); 1883 } 1884 case XFS_IOC_OPEN_BY_HANDLE: { 1885 xfs_fsop_handlereq_t hreq; 1886 1887 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1888 return -EFAULT; 1889 return xfs_open_by_handle(filp, &hreq); 1890 } 1891 case XFS_IOC_FSSETDM_BY_HANDLE: 1892 return xfs_fssetdm_by_handle(filp, arg); 1893 1894 case XFS_IOC_READLINK_BY_HANDLE: { 1895 xfs_fsop_handlereq_t hreq; 1896 1897 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1898 return -EFAULT; 1899 return xfs_readlink_by_handle(filp, &hreq); 1900 } 1901 case XFS_IOC_ATTRLIST_BY_HANDLE: 1902 return xfs_attrlist_by_handle(filp, arg); 1903 1904 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1905 return xfs_attrmulti_by_handle(filp, arg); 1906 1907 case XFS_IOC_SWAPEXT: { 1908 struct xfs_swapext sxp; 1909 1910 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1911 return -EFAULT; 1912 error = mnt_want_write_file(filp); 1913 if (error) 1914 return error; 1915 error = xfs_ioc_swapext(&sxp); 1916 mnt_drop_write_file(filp); 1917 return error; 1918 } 1919 1920 case XFS_IOC_FSCOUNTS: { 1921 xfs_fsop_counts_t out; 1922 1923 error = xfs_fs_counts(mp, &out); 1924 if (error) 1925 return error; 1926 1927 if (copy_to_user(arg, &out, sizeof(out))) 1928 return -EFAULT; 1929 return 0; 1930 } 1931 1932 case XFS_IOC_SET_RESBLKS: { 1933 xfs_fsop_resblks_t inout; 1934 uint64_t in; 1935 1936 if (!capable(CAP_SYS_ADMIN)) 1937 return -EPERM; 1938 1939 if (mp->m_flags & XFS_MOUNT_RDONLY) 1940 return -EROFS; 1941 1942 if (copy_from_user(&inout, arg, sizeof(inout))) 1943 return -EFAULT; 1944 1945 error = mnt_want_write_file(filp); 1946 if (error) 1947 return error; 1948 1949 /* input parameter is passed in resblks field of structure */ 1950 in = inout.resblks; 1951 error = xfs_reserve_blocks(mp, &in, &inout); 1952 mnt_drop_write_file(filp); 1953 if (error) 1954 return error; 1955 1956 if (copy_to_user(arg, &inout, sizeof(inout))) 1957 return -EFAULT; 1958 return 0; 1959 } 1960 1961 case XFS_IOC_GET_RESBLKS: { 1962 xfs_fsop_resblks_t out; 1963 1964 if (!capable(CAP_SYS_ADMIN)) 1965 return -EPERM; 1966 1967 error = xfs_reserve_blocks(mp, NULL, &out); 1968 if (error) 1969 return error; 1970 1971 if (copy_to_user(arg, &out, sizeof(out))) 1972 return -EFAULT; 1973 1974 return 0; 1975 } 1976 1977 case XFS_IOC_FSGROWFSDATA: { 1978 xfs_growfs_data_t in; 1979 1980 if (copy_from_user(&in, arg, sizeof(in))) 1981 return -EFAULT; 1982 1983 error = mnt_want_write_file(filp); 1984 if (error) 1985 return error; 1986 error = xfs_growfs_data(mp, &in); 1987 mnt_drop_write_file(filp); 1988 return error; 1989 } 1990 1991 case XFS_IOC_FSGROWFSLOG: { 1992 xfs_growfs_log_t in; 1993 1994 if (copy_from_user(&in, arg, sizeof(in))) 1995 return -EFAULT; 1996 1997 error = mnt_want_write_file(filp); 1998 if (error) 1999 return error; 2000 error = xfs_growfs_log(mp, &in); 2001 mnt_drop_write_file(filp); 2002 return error; 2003 } 2004 2005 case XFS_IOC_FSGROWFSRT: { 2006 xfs_growfs_rt_t in; 2007 2008 if (copy_from_user(&in, arg, sizeof(in))) 2009 return -EFAULT; 2010 2011 error = mnt_want_write_file(filp); 2012 if (error) 2013 return error; 2014 error = xfs_growfs_rt(mp, &in); 2015 mnt_drop_write_file(filp); 2016 return error; 2017 } 2018 2019 case XFS_IOC_GOINGDOWN: { 2020 uint32_t in; 2021 2022 if (!capable(CAP_SYS_ADMIN)) 2023 return -EPERM; 2024 2025 if (get_user(in, (uint32_t __user *)arg)) 2026 return -EFAULT; 2027 2028 return xfs_fs_goingdown(mp, in); 2029 } 2030 2031 case XFS_IOC_ERROR_INJECTION: { 2032 xfs_error_injection_t in; 2033 2034 if (!capable(CAP_SYS_ADMIN)) 2035 return -EPERM; 2036 2037 if (copy_from_user(&in, arg, sizeof(in))) 2038 return -EFAULT; 2039 2040 return xfs_errortag_add(mp, in.errtag); 2041 } 2042 2043 case XFS_IOC_ERROR_CLEARALL: 2044 if (!capable(CAP_SYS_ADMIN)) 2045 return -EPERM; 2046 2047 return xfs_errortag_clearall(mp); 2048 2049 case XFS_IOC_FREE_EOFBLOCKS: { 2050 struct xfs_fs_eofblocks eofb; 2051 struct xfs_eofblocks keofb; 2052 2053 if (!capable(CAP_SYS_ADMIN)) 2054 return -EPERM; 2055 2056 if (mp->m_flags & XFS_MOUNT_RDONLY) 2057 return -EROFS; 2058 2059 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2060 return -EFAULT; 2061 2062 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 2063 if (error) 2064 return error; 2065 2066 return xfs_icache_free_eofblocks(mp, &keofb); 2067 } 2068 2069 default: 2070 return -ENOTTY; 2071 } 2072 } 2073