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_sb.h" 25 #include "xfs_ag.h" 26 #include "xfs_mount.h" 27 #include "xfs_inode.h" 28 #include "xfs_ioctl.h" 29 #include "xfs_alloc.h" 30 #include "xfs_rtalloc.h" 31 #include "xfs_itable.h" 32 #include "xfs_error.h" 33 #include "xfs_attr.h" 34 #include "xfs_bmap.h" 35 #include "xfs_bmap_util.h" 36 #include "xfs_fsops.h" 37 #include "xfs_discard.h" 38 #include "xfs_quota.h" 39 #include "xfs_export.h" 40 #include "xfs_trace.h" 41 #include "xfs_icache.h" 42 #include "xfs_symlink.h" 43 #include "xfs_dinode.h" 44 #include "xfs_trans.h" 45 46 #include <linux/capability.h> 47 #include <linux/dcache.h> 48 #include <linux/mount.h> 49 #include <linux/namei.h> 50 #include <linux/pagemap.h> 51 #include <linux/slab.h> 52 #include <linux/exportfs.h> 53 54 /* 55 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 56 * a file or fs handle. 57 * 58 * XFS_IOC_PATH_TO_FSHANDLE 59 * returns fs handle for a mount point or path within that mount point 60 * XFS_IOC_FD_TO_HANDLE 61 * returns full handle for a FD opened in user space 62 * XFS_IOC_PATH_TO_HANDLE 63 * returns full handle for a path 64 */ 65 int 66 xfs_find_handle( 67 unsigned int cmd, 68 xfs_fsop_handlereq_t *hreq) 69 { 70 int hsize; 71 xfs_handle_t handle; 72 struct inode *inode; 73 struct fd f = {NULL}; 74 struct path path; 75 int error; 76 struct xfs_inode *ip; 77 78 if (cmd == XFS_IOC_FD_TO_HANDLE) { 79 f = fdget(hreq->fd); 80 if (!f.file) 81 return -EBADF; 82 inode = file_inode(f.file); 83 } else { 84 error = user_lpath((const char __user *)hreq->path, &path); 85 if (error) 86 return error; 87 inode = path.dentry->d_inode; 88 } 89 ip = XFS_I(inode); 90 91 /* 92 * We can only generate handles for inodes residing on a XFS filesystem, 93 * and only for regular files, directories or symbolic links. 94 */ 95 error = -EINVAL; 96 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 97 goto out_put; 98 99 error = -EBADF; 100 if (!S_ISREG(inode->i_mode) && 101 !S_ISDIR(inode->i_mode) && 102 !S_ISLNK(inode->i_mode)) 103 goto out_put; 104 105 106 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 107 108 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 109 /* 110 * This handle only contains an fsid, zero the rest. 111 */ 112 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 113 hsize = sizeof(xfs_fsid_t); 114 } else { 115 int lock_mode; 116 117 lock_mode = xfs_ilock_map_shared(ip); 118 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 119 sizeof(handle.ha_fid.fid_len); 120 handle.ha_fid.fid_pad = 0; 121 handle.ha_fid.fid_gen = ip->i_d.di_gen; 122 handle.ha_fid.fid_ino = ip->i_ino; 123 xfs_iunlock_map_shared(ip, lock_mode); 124 125 hsize = XFS_HSIZE(handle); 126 } 127 128 error = -EFAULT; 129 if (copy_to_user(hreq->ohandle, &handle, hsize) || 130 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 131 goto out_put; 132 133 error = 0; 134 135 out_put: 136 if (cmd == XFS_IOC_FD_TO_HANDLE) 137 fdput(f); 138 else 139 path_put(&path); 140 return error; 141 } 142 143 /* 144 * No need to do permission checks on the various pathname components 145 * as the handle operations are privileged. 146 */ 147 STATIC int 148 xfs_handle_acceptable( 149 void *context, 150 struct dentry *dentry) 151 { 152 return 1; 153 } 154 155 /* 156 * Convert userspace handle data into a dentry. 157 */ 158 struct dentry * 159 xfs_handle_to_dentry( 160 struct file *parfilp, 161 void __user *uhandle, 162 u32 hlen) 163 { 164 xfs_handle_t handle; 165 struct xfs_fid64 fid; 166 167 /* 168 * Only allow handle opens under a directory. 169 */ 170 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 171 return ERR_PTR(-ENOTDIR); 172 173 if (hlen != sizeof(xfs_handle_t)) 174 return ERR_PTR(-EINVAL); 175 if (copy_from_user(&handle, uhandle, hlen)) 176 return ERR_PTR(-EFAULT); 177 if (handle.ha_fid.fid_len != 178 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 179 return ERR_PTR(-EINVAL); 180 181 memset(&fid, 0, sizeof(struct fid)); 182 fid.ino = handle.ha_fid.fid_ino; 183 fid.gen = handle.ha_fid.fid_gen; 184 185 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 186 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 187 xfs_handle_acceptable, NULL); 188 } 189 190 STATIC struct dentry * 191 xfs_handlereq_to_dentry( 192 struct file *parfilp, 193 xfs_fsop_handlereq_t *hreq) 194 { 195 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 196 } 197 198 int 199 xfs_open_by_handle( 200 struct file *parfilp, 201 xfs_fsop_handlereq_t *hreq) 202 { 203 const struct cred *cred = current_cred(); 204 int error; 205 int fd; 206 int permflag; 207 struct file *filp; 208 struct inode *inode; 209 struct dentry *dentry; 210 fmode_t fmode; 211 struct path path; 212 213 if (!capable(CAP_SYS_ADMIN)) 214 return -XFS_ERROR(EPERM); 215 216 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 217 if (IS_ERR(dentry)) 218 return PTR_ERR(dentry); 219 inode = dentry->d_inode; 220 221 /* Restrict xfs_open_by_handle to directories & regular files. */ 222 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 223 error = -XFS_ERROR(EPERM); 224 goto out_dput; 225 } 226 227 #if BITS_PER_LONG != 32 228 hreq->oflags |= O_LARGEFILE; 229 #endif 230 231 permflag = hreq->oflags; 232 fmode = OPEN_FMODE(permflag); 233 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 234 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 235 error = -XFS_ERROR(EPERM); 236 goto out_dput; 237 } 238 239 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 240 error = -XFS_ERROR(EACCES); 241 goto out_dput; 242 } 243 244 /* Can't write directories. */ 245 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 246 error = -XFS_ERROR(EISDIR); 247 goto out_dput; 248 } 249 250 fd = get_unused_fd_flags(0); 251 if (fd < 0) { 252 error = fd; 253 goto out_dput; 254 } 255 256 path.mnt = parfilp->f_path.mnt; 257 path.dentry = dentry; 258 filp = dentry_open(&path, hreq->oflags, cred); 259 dput(dentry); 260 if (IS_ERR(filp)) { 261 put_unused_fd(fd); 262 return PTR_ERR(filp); 263 } 264 265 if (S_ISREG(inode->i_mode)) { 266 filp->f_flags |= O_NOATIME; 267 filp->f_mode |= FMODE_NOCMTIME; 268 } 269 270 fd_install(fd, filp); 271 return fd; 272 273 out_dput: 274 dput(dentry); 275 return error; 276 } 277 278 /* 279 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's 280 * unused first argument. 281 */ 282 STATIC int 283 do_readlink( 284 char __user *buffer, 285 int buflen, 286 const char *link) 287 { 288 int len; 289 290 len = PTR_ERR(link); 291 if (IS_ERR(link)) 292 goto out; 293 294 len = strlen(link); 295 if (len > (unsigned) buflen) 296 len = buflen; 297 if (copy_to_user(buffer, link, len)) 298 len = -EFAULT; 299 out: 300 return len; 301 } 302 303 304 int 305 xfs_readlink_by_handle( 306 struct file *parfilp, 307 xfs_fsop_handlereq_t *hreq) 308 { 309 struct dentry *dentry; 310 __u32 olen; 311 void *link; 312 int error; 313 314 if (!capable(CAP_SYS_ADMIN)) 315 return -XFS_ERROR(EPERM); 316 317 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 318 if (IS_ERR(dentry)) 319 return PTR_ERR(dentry); 320 321 /* Restrict this handle operation to symlinks only. */ 322 if (!S_ISLNK(dentry->d_inode->i_mode)) { 323 error = -XFS_ERROR(EINVAL); 324 goto out_dput; 325 } 326 327 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 328 error = -XFS_ERROR(EFAULT); 329 goto out_dput; 330 } 331 332 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); 333 if (!link) { 334 error = -XFS_ERROR(ENOMEM); 335 goto out_dput; 336 } 337 338 error = -xfs_readlink(XFS_I(dentry->d_inode), link); 339 if (error) 340 goto out_kfree; 341 error = do_readlink(hreq->ohandle, olen, link); 342 if (error) 343 goto out_kfree; 344 345 out_kfree: 346 kfree(link); 347 out_dput: 348 dput(dentry); 349 return error; 350 } 351 352 int 353 xfs_set_dmattrs( 354 xfs_inode_t *ip, 355 u_int evmask, 356 u_int16_t state) 357 { 358 xfs_mount_t *mp = ip->i_mount; 359 xfs_trans_t *tp; 360 int error; 361 362 if (!capable(CAP_SYS_ADMIN)) 363 return XFS_ERROR(EPERM); 364 365 if (XFS_FORCED_SHUTDOWN(mp)) 366 return XFS_ERROR(EIO); 367 368 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); 369 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); 370 if (error) { 371 xfs_trans_cancel(tp, 0); 372 return error; 373 } 374 xfs_ilock(ip, XFS_ILOCK_EXCL); 375 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 376 377 ip->i_d.di_dmevmask = evmask; 378 ip->i_d.di_dmstate = state; 379 380 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 381 error = xfs_trans_commit(tp, 0); 382 383 return error; 384 } 385 386 STATIC int 387 xfs_fssetdm_by_handle( 388 struct file *parfilp, 389 void __user *arg) 390 { 391 int error; 392 struct fsdmidata fsd; 393 xfs_fsop_setdm_handlereq_t dmhreq; 394 struct dentry *dentry; 395 396 if (!capable(CAP_MKNOD)) 397 return -XFS_ERROR(EPERM); 398 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) 399 return -XFS_ERROR(EFAULT); 400 401 error = mnt_want_write_file(parfilp); 402 if (error) 403 return error; 404 405 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); 406 if (IS_ERR(dentry)) { 407 mnt_drop_write_file(parfilp); 408 return PTR_ERR(dentry); 409 } 410 411 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) { 412 error = -XFS_ERROR(EPERM); 413 goto out; 414 } 415 416 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { 417 error = -XFS_ERROR(EFAULT); 418 goto out; 419 } 420 421 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask, 422 fsd.fsd_dmstate); 423 424 out: 425 mnt_drop_write_file(parfilp); 426 dput(dentry); 427 return error; 428 } 429 430 STATIC int 431 xfs_attrlist_by_handle( 432 struct file *parfilp, 433 void __user *arg) 434 { 435 int error = -ENOMEM; 436 attrlist_cursor_kern_t *cursor; 437 xfs_fsop_attrlist_handlereq_t al_hreq; 438 struct dentry *dentry; 439 char *kbuf; 440 441 if (!capable(CAP_SYS_ADMIN)) 442 return -XFS_ERROR(EPERM); 443 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 444 return -XFS_ERROR(EFAULT); 445 if (al_hreq.buflen < sizeof(struct attrlist) || 446 al_hreq.buflen > XATTR_LIST_MAX) 447 return -XFS_ERROR(EINVAL); 448 449 /* 450 * Reject flags, only allow namespaces. 451 */ 452 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 453 return -XFS_ERROR(EINVAL); 454 455 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 456 if (IS_ERR(dentry)) 457 return PTR_ERR(dentry); 458 459 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); 460 if (!kbuf) 461 goto out_dput; 462 463 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 464 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen, 465 al_hreq.flags, cursor); 466 if (error) 467 goto out_kfree; 468 469 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 470 error = -EFAULT; 471 472 out_kfree: 473 kmem_free(kbuf); 474 out_dput: 475 dput(dentry); 476 return error; 477 } 478 479 int 480 xfs_attrmulti_attr_get( 481 struct inode *inode, 482 unsigned char *name, 483 unsigned char __user *ubuf, 484 __uint32_t *len, 485 __uint32_t flags) 486 { 487 unsigned char *kbuf; 488 int error = EFAULT; 489 490 if (*len > XATTR_SIZE_MAX) 491 return EINVAL; 492 kbuf = kmem_zalloc_large(*len, KM_SLEEP); 493 if (!kbuf) 494 return ENOMEM; 495 496 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); 497 if (error) 498 goto out_kfree; 499 500 if (copy_to_user(ubuf, kbuf, *len)) 501 error = EFAULT; 502 503 out_kfree: 504 kmem_free(kbuf); 505 return error; 506 } 507 508 int 509 xfs_attrmulti_attr_set( 510 struct inode *inode, 511 unsigned char *name, 512 const unsigned char __user *ubuf, 513 __uint32_t len, 514 __uint32_t flags) 515 { 516 unsigned char *kbuf; 517 int error = EFAULT; 518 519 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 520 return EPERM; 521 if (len > XATTR_SIZE_MAX) 522 return EINVAL; 523 524 kbuf = memdup_user(ubuf, len); 525 if (IS_ERR(kbuf)) 526 return PTR_ERR(kbuf); 527 528 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 529 530 return error; 531 } 532 533 int 534 xfs_attrmulti_attr_remove( 535 struct inode *inode, 536 unsigned char *name, 537 __uint32_t flags) 538 { 539 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 540 return EPERM; 541 return xfs_attr_remove(XFS_I(inode), name, flags); 542 } 543 544 STATIC int 545 xfs_attrmulti_by_handle( 546 struct file *parfilp, 547 void __user *arg) 548 { 549 int error; 550 xfs_attr_multiop_t *ops; 551 xfs_fsop_attrmulti_handlereq_t am_hreq; 552 struct dentry *dentry; 553 unsigned int i, size; 554 unsigned char *attr_name; 555 556 if (!capable(CAP_SYS_ADMIN)) 557 return -XFS_ERROR(EPERM); 558 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 559 return -XFS_ERROR(EFAULT); 560 561 /* overflow check */ 562 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 563 return -E2BIG; 564 565 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 566 if (IS_ERR(dentry)) 567 return PTR_ERR(dentry); 568 569 error = E2BIG; 570 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 571 if (!size || size > 16 * PAGE_SIZE) 572 goto out_dput; 573 574 ops = memdup_user(am_hreq.ops, size); 575 if (IS_ERR(ops)) { 576 error = PTR_ERR(ops); 577 goto out_dput; 578 } 579 580 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 581 if (!attr_name) 582 goto out_kfree_ops; 583 584 error = 0; 585 for (i = 0; i < am_hreq.opcount; i++) { 586 ops[i].am_error = strncpy_from_user((char *)attr_name, 587 ops[i].am_attrname, MAXNAMELEN); 588 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 589 error = -ERANGE; 590 if (ops[i].am_error < 0) 591 break; 592 593 switch (ops[i].am_opcode) { 594 case ATTR_OP_GET: 595 ops[i].am_error = xfs_attrmulti_attr_get( 596 dentry->d_inode, attr_name, 597 ops[i].am_attrvalue, &ops[i].am_length, 598 ops[i].am_flags); 599 break; 600 case ATTR_OP_SET: 601 ops[i].am_error = mnt_want_write_file(parfilp); 602 if (ops[i].am_error) 603 break; 604 ops[i].am_error = xfs_attrmulti_attr_set( 605 dentry->d_inode, attr_name, 606 ops[i].am_attrvalue, ops[i].am_length, 607 ops[i].am_flags); 608 mnt_drop_write_file(parfilp); 609 break; 610 case ATTR_OP_REMOVE: 611 ops[i].am_error = mnt_want_write_file(parfilp); 612 if (ops[i].am_error) 613 break; 614 ops[i].am_error = xfs_attrmulti_attr_remove( 615 dentry->d_inode, attr_name, 616 ops[i].am_flags); 617 mnt_drop_write_file(parfilp); 618 break; 619 default: 620 ops[i].am_error = EINVAL; 621 } 622 } 623 624 if (copy_to_user(am_hreq.ops, ops, size)) 625 error = XFS_ERROR(EFAULT); 626 627 kfree(attr_name); 628 out_kfree_ops: 629 kfree(ops); 630 out_dput: 631 dput(dentry); 632 return -error; 633 } 634 635 int 636 xfs_ioc_space( 637 struct xfs_inode *ip, 638 struct inode *inode, 639 struct file *filp, 640 int ioflags, 641 unsigned int cmd, 642 xfs_flock64_t *bf) 643 { 644 struct xfs_mount *mp = ip->i_mount; 645 struct xfs_trans *tp; 646 struct iattr iattr; 647 bool setprealloc = false; 648 bool clrprealloc = false; 649 int error; 650 651 /* 652 * Only allow the sys admin to reserve space unless 653 * unwritten extents are enabled. 654 */ 655 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && 656 !capable(CAP_SYS_ADMIN)) 657 return -XFS_ERROR(EPERM); 658 659 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 660 return -XFS_ERROR(EPERM); 661 662 if (!(filp->f_mode & FMODE_WRITE)) 663 return -XFS_ERROR(EBADF); 664 665 if (!S_ISREG(inode->i_mode)) 666 return -XFS_ERROR(EINVAL); 667 668 error = mnt_want_write_file(filp); 669 if (error) 670 return error; 671 672 xfs_ilock(ip, XFS_IOLOCK_EXCL); 673 674 switch (bf->l_whence) { 675 case 0: /*SEEK_SET*/ 676 break; 677 case 1: /*SEEK_CUR*/ 678 bf->l_start += filp->f_pos; 679 break; 680 case 2: /*SEEK_END*/ 681 bf->l_start += XFS_ISIZE(ip); 682 break; 683 default: 684 error = XFS_ERROR(EINVAL); 685 goto out_unlock; 686 } 687 688 /* 689 * length of <= 0 for resv/unresv/zero is invalid. length for 690 * alloc/free is ignored completely and we have no idea what userspace 691 * might have set it to, so set it to zero to allow range 692 * checks to pass. 693 */ 694 switch (cmd) { 695 case XFS_IOC_ZERO_RANGE: 696 case XFS_IOC_RESVSP: 697 case XFS_IOC_RESVSP64: 698 case XFS_IOC_UNRESVSP: 699 case XFS_IOC_UNRESVSP64: 700 if (bf->l_len <= 0) { 701 error = XFS_ERROR(EINVAL); 702 goto out_unlock; 703 } 704 break; 705 default: 706 bf->l_len = 0; 707 break; 708 } 709 710 if (bf->l_start < 0 || 711 bf->l_start > mp->m_super->s_maxbytes || 712 bf->l_start + bf->l_len < 0 || 713 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) { 714 error = XFS_ERROR(EINVAL); 715 goto out_unlock; 716 } 717 718 switch (cmd) { 719 case XFS_IOC_ZERO_RANGE: 720 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); 721 if (!error) 722 setprealloc = true; 723 break; 724 case XFS_IOC_RESVSP: 725 case XFS_IOC_RESVSP64: 726 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, 727 XFS_BMAPI_PREALLOC); 728 if (!error) 729 setprealloc = true; 730 break; 731 case XFS_IOC_UNRESVSP: 732 case XFS_IOC_UNRESVSP64: 733 error = xfs_free_file_space(ip, bf->l_start, bf->l_len); 734 break; 735 case XFS_IOC_ALLOCSP: 736 case XFS_IOC_ALLOCSP64: 737 case XFS_IOC_FREESP: 738 case XFS_IOC_FREESP64: 739 if (bf->l_start > XFS_ISIZE(ip)) { 740 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 741 bf->l_start - XFS_ISIZE(ip), 0); 742 if (error) 743 goto out_unlock; 744 } 745 746 iattr.ia_valid = ATTR_SIZE; 747 iattr.ia_size = bf->l_start; 748 749 error = xfs_setattr_size(ip, &iattr); 750 if (!error) 751 clrprealloc = true; 752 break; 753 default: 754 ASSERT(0); 755 error = XFS_ERROR(EINVAL); 756 } 757 758 if (error) 759 goto out_unlock; 760 761 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); 762 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0); 763 if (error) { 764 xfs_trans_cancel(tp, 0); 765 goto out_unlock; 766 } 767 768 xfs_ilock(ip, XFS_ILOCK_EXCL); 769 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 770 771 if (!(ioflags & IO_INVIS)) { 772 ip->i_d.di_mode &= ~S_ISUID; 773 if (ip->i_d.di_mode & S_IXGRP) 774 ip->i_d.di_mode &= ~S_ISGID; 775 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); 776 } 777 778 if (setprealloc) 779 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; 780 else if (clrprealloc) 781 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; 782 783 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 784 if (filp->f_flags & O_DSYNC) 785 xfs_trans_set_sync(tp); 786 error = xfs_trans_commit(tp, 0); 787 788 out_unlock: 789 xfs_iunlock(ip, XFS_IOLOCK_EXCL); 790 mnt_drop_write_file(filp); 791 return -error; 792 } 793 794 STATIC int 795 xfs_ioc_bulkstat( 796 xfs_mount_t *mp, 797 unsigned int cmd, 798 void __user *arg) 799 { 800 xfs_fsop_bulkreq_t bulkreq; 801 int count; /* # of records returned */ 802 xfs_ino_t inlast; /* last inode number */ 803 int done; 804 int error; 805 806 /* done = 1 if there are more stats to get and if bulkstat */ 807 /* should be called again (unused here, but used in dmapi) */ 808 809 if (!capable(CAP_SYS_ADMIN)) 810 return -EPERM; 811 812 if (XFS_FORCED_SHUTDOWN(mp)) 813 return -XFS_ERROR(EIO); 814 815 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) 816 return -XFS_ERROR(EFAULT); 817 818 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) 819 return -XFS_ERROR(EFAULT); 820 821 if ((count = bulkreq.icount) <= 0) 822 return -XFS_ERROR(EINVAL); 823 824 if (bulkreq.ubuffer == NULL) 825 return -XFS_ERROR(EINVAL); 826 827 if (cmd == XFS_IOC_FSINUMBERS) 828 error = xfs_inumbers(mp, &inlast, &count, 829 bulkreq.ubuffer, xfs_inumbers_fmt); 830 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) 831 error = xfs_bulkstat_single(mp, &inlast, 832 bulkreq.ubuffer, &done); 833 else /* XFS_IOC_FSBULKSTAT */ 834 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, 835 sizeof(xfs_bstat_t), bulkreq.ubuffer, 836 &done); 837 838 if (error) 839 return -error; 840 841 if (bulkreq.ocount != NULL) { 842 if (copy_to_user(bulkreq.lastip, &inlast, 843 sizeof(xfs_ino_t))) 844 return -XFS_ERROR(EFAULT); 845 846 if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) 847 return -XFS_ERROR(EFAULT); 848 } 849 850 return 0; 851 } 852 853 STATIC int 854 xfs_ioc_fsgeometry_v1( 855 xfs_mount_t *mp, 856 void __user *arg) 857 { 858 xfs_fsop_geom_t fsgeo; 859 int error; 860 861 error = xfs_fs_geometry(mp, &fsgeo, 3); 862 if (error) 863 return -error; 864 865 /* 866 * Caller should have passed an argument of type 867 * xfs_fsop_geom_v1_t. This is a proper subset of the 868 * xfs_fsop_geom_t that xfs_fs_geometry() fills in. 869 */ 870 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) 871 return -XFS_ERROR(EFAULT); 872 return 0; 873 } 874 875 STATIC int 876 xfs_ioc_fsgeometry( 877 xfs_mount_t *mp, 878 void __user *arg) 879 { 880 xfs_fsop_geom_t fsgeo; 881 int error; 882 883 error = xfs_fs_geometry(mp, &fsgeo, 4); 884 if (error) 885 return -error; 886 887 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) 888 return -XFS_ERROR(EFAULT); 889 return 0; 890 } 891 892 /* 893 * Linux extended inode flags interface. 894 */ 895 896 STATIC unsigned int 897 xfs_merge_ioc_xflags( 898 unsigned int flags, 899 unsigned int start) 900 { 901 unsigned int xflags = start; 902 903 if (flags & FS_IMMUTABLE_FL) 904 xflags |= XFS_XFLAG_IMMUTABLE; 905 else 906 xflags &= ~XFS_XFLAG_IMMUTABLE; 907 if (flags & FS_APPEND_FL) 908 xflags |= XFS_XFLAG_APPEND; 909 else 910 xflags &= ~XFS_XFLAG_APPEND; 911 if (flags & FS_SYNC_FL) 912 xflags |= XFS_XFLAG_SYNC; 913 else 914 xflags &= ~XFS_XFLAG_SYNC; 915 if (flags & FS_NOATIME_FL) 916 xflags |= XFS_XFLAG_NOATIME; 917 else 918 xflags &= ~XFS_XFLAG_NOATIME; 919 if (flags & FS_NODUMP_FL) 920 xflags |= XFS_XFLAG_NODUMP; 921 else 922 xflags &= ~XFS_XFLAG_NODUMP; 923 924 return xflags; 925 } 926 927 STATIC unsigned int 928 xfs_di2lxflags( 929 __uint16_t di_flags) 930 { 931 unsigned int flags = 0; 932 933 if (di_flags & XFS_DIFLAG_IMMUTABLE) 934 flags |= FS_IMMUTABLE_FL; 935 if (di_flags & XFS_DIFLAG_APPEND) 936 flags |= FS_APPEND_FL; 937 if (di_flags & XFS_DIFLAG_SYNC) 938 flags |= FS_SYNC_FL; 939 if (di_flags & XFS_DIFLAG_NOATIME) 940 flags |= FS_NOATIME_FL; 941 if (di_flags & XFS_DIFLAG_NODUMP) 942 flags |= FS_NODUMP_FL; 943 return flags; 944 } 945 946 STATIC int 947 xfs_ioc_fsgetxattr( 948 xfs_inode_t *ip, 949 int attr, 950 void __user *arg) 951 { 952 struct fsxattr fa; 953 954 memset(&fa, 0, sizeof(struct fsxattr)); 955 956 xfs_ilock(ip, XFS_ILOCK_SHARED); 957 fa.fsx_xflags = xfs_ip2xflags(ip); 958 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 959 fa.fsx_projid = xfs_get_projid(ip); 960 961 if (attr) { 962 if (ip->i_afp) { 963 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 964 fa.fsx_nextents = ip->i_afp->if_bytes / 965 sizeof(xfs_bmbt_rec_t); 966 else 967 fa.fsx_nextents = ip->i_d.di_anextents; 968 } else 969 fa.fsx_nextents = 0; 970 } else { 971 if (ip->i_df.if_flags & XFS_IFEXTENTS) 972 fa.fsx_nextents = ip->i_df.if_bytes / 973 sizeof(xfs_bmbt_rec_t); 974 else 975 fa.fsx_nextents = ip->i_d.di_nextents; 976 } 977 xfs_iunlock(ip, XFS_ILOCK_SHARED); 978 979 if (copy_to_user(arg, &fa, sizeof(fa))) 980 return -EFAULT; 981 return 0; 982 } 983 984 STATIC void 985 xfs_set_diflags( 986 struct xfs_inode *ip, 987 unsigned int xflags) 988 { 989 unsigned int di_flags; 990 991 /* can't set PREALLOC this way, just preserve it */ 992 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 993 if (xflags & XFS_XFLAG_IMMUTABLE) 994 di_flags |= XFS_DIFLAG_IMMUTABLE; 995 if (xflags & XFS_XFLAG_APPEND) 996 di_flags |= XFS_DIFLAG_APPEND; 997 if (xflags & XFS_XFLAG_SYNC) 998 di_flags |= XFS_DIFLAG_SYNC; 999 if (xflags & XFS_XFLAG_NOATIME) 1000 di_flags |= XFS_DIFLAG_NOATIME; 1001 if (xflags & XFS_XFLAG_NODUMP) 1002 di_flags |= XFS_DIFLAG_NODUMP; 1003 if (xflags & XFS_XFLAG_PROJINHERIT) 1004 di_flags |= XFS_DIFLAG_PROJINHERIT; 1005 if (xflags & XFS_XFLAG_NODEFRAG) 1006 di_flags |= XFS_DIFLAG_NODEFRAG; 1007 if (xflags & XFS_XFLAG_FILESTREAM) 1008 di_flags |= XFS_DIFLAG_FILESTREAM; 1009 if (S_ISDIR(ip->i_d.di_mode)) { 1010 if (xflags & XFS_XFLAG_RTINHERIT) 1011 di_flags |= XFS_DIFLAG_RTINHERIT; 1012 if (xflags & XFS_XFLAG_NOSYMLINKS) 1013 di_flags |= XFS_DIFLAG_NOSYMLINKS; 1014 if (xflags & XFS_XFLAG_EXTSZINHERIT) 1015 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 1016 } else if (S_ISREG(ip->i_d.di_mode)) { 1017 if (xflags & XFS_XFLAG_REALTIME) 1018 di_flags |= XFS_DIFLAG_REALTIME; 1019 if (xflags & XFS_XFLAG_EXTSIZE) 1020 di_flags |= XFS_DIFLAG_EXTSIZE; 1021 } 1022 1023 ip->i_d.di_flags = di_flags; 1024 } 1025 1026 STATIC void 1027 xfs_diflags_to_linux( 1028 struct xfs_inode *ip) 1029 { 1030 struct inode *inode = VFS_I(ip); 1031 unsigned int xflags = xfs_ip2xflags(ip); 1032 1033 if (xflags & XFS_XFLAG_IMMUTABLE) 1034 inode->i_flags |= S_IMMUTABLE; 1035 else 1036 inode->i_flags &= ~S_IMMUTABLE; 1037 if (xflags & XFS_XFLAG_APPEND) 1038 inode->i_flags |= S_APPEND; 1039 else 1040 inode->i_flags &= ~S_APPEND; 1041 if (xflags & XFS_XFLAG_SYNC) 1042 inode->i_flags |= S_SYNC; 1043 else 1044 inode->i_flags &= ~S_SYNC; 1045 if (xflags & XFS_XFLAG_NOATIME) 1046 inode->i_flags |= S_NOATIME; 1047 else 1048 inode->i_flags &= ~S_NOATIME; 1049 } 1050 1051 #define FSX_PROJID 1 1052 #define FSX_EXTSIZE 2 1053 #define FSX_XFLAGS 4 1054 #define FSX_NONBLOCK 8 1055 1056 STATIC int 1057 xfs_ioctl_setattr( 1058 xfs_inode_t *ip, 1059 struct fsxattr *fa, 1060 int mask) 1061 { 1062 struct xfs_mount *mp = ip->i_mount; 1063 struct xfs_trans *tp; 1064 unsigned int lock_flags = 0; 1065 struct xfs_dquot *udqp = NULL; 1066 struct xfs_dquot *pdqp = NULL; 1067 struct xfs_dquot *olddquot = NULL; 1068 int code; 1069 1070 trace_xfs_ioctl_setattr(ip); 1071 1072 if (mp->m_flags & XFS_MOUNT_RDONLY) 1073 return XFS_ERROR(EROFS); 1074 if (XFS_FORCED_SHUTDOWN(mp)) 1075 return XFS_ERROR(EIO); 1076 1077 /* 1078 * Disallow 32bit project ids when projid32bit feature is not enabled. 1079 */ 1080 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) && 1081 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1082 return XFS_ERROR(EINVAL); 1083 1084 /* 1085 * If disk quotas is on, we make sure that the dquots do exist on disk, 1086 * before we start any other transactions. Trying to do this later 1087 * is messy. We don't care to take a readlock to look at the ids 1088 * in inode here, because we can't hold it across the trans_reserve. 1089 * If the IDs do change before we take the ilock, we're covered 1090 * because the i_*dquot fields will get updated anyway. 1091 */ 1092 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) { 1093 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1094 ip->i_d.di_gid, fa->fsx_projid, 1095 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1096 if (code) 1097 return code; 1098 } 1099 1100 /* 1101 * For the other attributes, we acquire the inode lock and 1102 * first do an error checking pass. 1103 */ 1104 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); 1105 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); 1106 if (code) 1107 goto error_return; 1108 1109 lock_flags = XFS_ILOCK_EXCL; 1110 xfs_ilock(ip, lock_flags); 1111 1112 /* 1113 * CAP_FOWNER overrides the following restrictions: 1114 * 1115 * The user ID of the calling process must be equal 1116 * to the file owner ID, except in cases where the 1117 * CAP_FSETID capability is applicable. 1118 */ 1119 if (!inode_owner_or_capable(VFS_I(ip))) { 1120 code = XFS_ERROR(EPERM); 1121 goto error_return; 1122 } 1123 1124 /* 1125 * Do a quota reservation only if projid is actually going to change. 1126 * Only allow changing of projid from init_user_ns since it is a 1127 * non user namespace aware identifier. 1128 */ 1129 if (mask & FSX_PROJID) { 1130 if (current_user_ns() != &init_user_ns) { 1131 code = XFS_ERROR(EINVAL); 1132 goto error_return; 1133 } 1134 1135 if (XFS_IS_QUOTA_RUNNING(mp) && 1136 XFS_IS_PQUOTA_ON(mp) && 1137 xfs_get_projid(ip) != fa->fsx_projid) { 1138 ASSERT(tp); 1139 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, 1140 pdqp, capable(CAP_FOWNER) ? 1141 XFS_QMOPT_FORCE_RES : 0); 1142 if (code) /* out of quota */ 1143 goto error_return; 1144 } 1145 } 1146 1147 if (mask & FSX_EXTSIZE) { 1148 /* 1149 * Can't change extent size if any extents are allocated. 1150 */ 1151 if (ip->i_d.di_nextents && 1152 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != 1153 fa->fsx_extsize)) { 1154 code = XFS_ERROR(EINVAL); /* EFBIG? */ 1155 goto error_return; 1156 } 1157 1158 /* 1159 * Extent size must be a multiple of the appropriate block 1160 * size, if set at all. It must also be smaller than the 1161 * maximum extent size supported by the filesystem. 1162 * 1163 * Also, for non-realtime files, limit the extent size hint to 1164 * half the size of the AGs in the filesystem so alignment 1165 * doesn't result in extents larger than an AG. 1166 */ 1167 if (fa->fsx_extsize != 0) { 1168 xfs_extlen_t size; 1169 xfs_fsblock_t extsize_fsb; 1170 1171 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1172 if (extsize_fsb > MAXEXTLEN) { 1173 code = XFS_ERROR(EINVAL); 1174 goto error_return; 1175 } 1176 1177 if (XFS_IS_REALTIME_INODE(ip) || 1178 ((mask & FSX_XFLAGS) && 1179 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) { 1180 size = mp->m_sb.sb_rextsize << 1181 mp->m_sb.sb_blocklog; 1182 } else { 1183 size = mp->m_sb.sb_blocksize; 1184 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) { 1185 code = XFS_ERROR(EINVAL); 1186 goto error_return; 1187 } 1188 } 1189 1190 if (fa->fsx_extsize % size) { 1191 code = XFS_ERROR(EINVAL); 1192 goto error_return; 1193 } 1194 } 1195 } 1196 1197 1198 if (mask & FSX_XFLAGS) { 1199 /* 1200 * Can't change realtime flag if any extents are allocated. 1201 */ 1202 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1203 (XFS_IS_REALTIME_INODE(ip)) != 1204 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1205 code = XFS_ERROR(EINVAL); /* EFBIG? */ 1206 goto error_return; 1207 } 1208 1209 /* 1210 * If realtime flag is set then must have realtime data. 1211 */ 1212 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1213 if ((mp->m_sb.sb_rblocks == 0) || 1214 (mp->m_sb.sb_rextsize == 0) || 1215 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { 1216 code = XFS_ERROR(EINVAL); 1217 goto error_return; 1218 } 1219 } 1220 1221 /* 1222 * Can't modify an immutable/append-only file unless 1223 * we have appropriate permission. 1224 */ 1225 if ((ip->i_d.di_flags & 1226 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || 1227 (fa->fsx_xflags & 1228 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && 1229 !capable(CAP_LINUX_IMMUTABLE)) { 1230 code = XFS_ERROR(EPERM); 1231 goto error_return; 1232 } 1233 } 1234 1235 xfs_trans_ijoin(tp, ip, 0); 1236 1237 /* 1238 * Change file ownership. Must be the owner or privileged. 1239 */ 1240 if (mask & FSX_PROJID) { 1241 /* 1242 * CAP_FSETID overrides the following restrictions: 1243 * 1244 * The set-user-ID and set-group-ID bits of a file will be 1245 * cleared upon successful return from chown() 1246 */ 1247 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && 1248 !inode_capable(VFS_I(ip), CAP_FSETID)) 1249 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); 1250 1251 /* 1252 * Change the ownerships and register quota modifications 1253 * in the transaction. 1254 */ 1255 if (xfs_get_projid(ip) != fa->fsx_projid) { 1256 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1257 olddquot = xfs_qm_vop_chown(tp, ip, 1258 &ip->i_pdquot, pdqp); 1259 } 1260 xfs_set_projid(ip, fa->fsx_projid); 1261 1262 /* 1263 * We may have to rev the inode as well as 1264 * the superblock version number since projids didn't 1265 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. 1266 */ 1267 if (ip->i_d.di_version == 1) 1268 xfs_bump_ino_vers2(tp, ip); 1269 } 1270 1271 } 1272 1273 if (mask & FSX_EXTSIZE) 1274 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1275 if (mask & FSX_XFLAGS) { 1276 xfs_set_diflags(ip, fa->fsx_xflags); 1277 xfs_diflags_to_linux(ip); 1278 } 1279 1280 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1281 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1282 1283 XFS_STATS_INC(xs_ig_attrchg); 1284 1285 /* 1286 * If this is a synchronous mount, make sure that the 1287 * transaction goes to disk before returning to the user. 1288 * This is slightly sub-optimal in that truncates require 1289 * two sync transactions instead of one for wsync filesystems. 1290 * One for the truncate and one for the timestamps since we 1291 * don't want to change the timestamps unless we're sure the 1292 * truncate worked. Truncates are less than 1% of the laddis 1293 * mix so this probably isn't worth the trouble to optimize. 1294 */ 1295 if (mp->m_flags & XFS_MOUNT_WSYNC) 1296 xfs_trans_set_sync(tp); 1297 code = xfs_trans_commit(tp, 0); 1298 xfs_iunlock(ip, lock_flags); 1299 1300 /* 1301 * Release any dquot(s) the inode had kept before chown. 1302 */ 1303 xfs_qm_dqrele(olddquot); 1304 xfs_qm_dqrele(udqp); 1305 xfs_qm_dqrele(pdqp); 1306 1307 return code; 1308 1309 error_return: 1310 xfs_qm_dqrele(udqp); 1311 xfs_qm_dqrele(pdqp); 1312 xfs_trans_cancel(tp, 0); 1313 if (lock_flags) 1314 xfs_iunlock(ip, lock_flags); 1315 return code; 1316 } 1317 1318 STATIC int 1319 xfs_ioc_fssetxattr( 1320 xfs_inode_t *ip, 1321 struct file *filp, 1322 void __user *arg) 1323 { 1324 struct fsxattr fa; 1325 unsigned int mask; 1326 int error; 1327 1328 if (copy_from_user(&fa, arg, sizeof(fa))) 1329 return -EFAULT; 1330 1331 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID; 1332 if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) 1333 mask |= FSX_NONBLOCK; 1334 1335 error = mnt_want_write_file(filp); 1336 if (error) 1337 return error; 1338 error = xfs_ioctl_setattr(ip, &fa, mask); 1339 mnt_drop_write_file(filp); 1340 return -error; 1341 } 1342 1343 STATIC int 1344 xfs_ioc_getxflags( 1345 xfs_inode_t *ip, 1346 void __user *arg) 1347 { 1348 unsigned int flags; 1349 1350 flags = xfs_di2lxflags(ip->i_d.di_flags); 1351 if (copy_to_user(arg, &flags, sizeof(flags))) 1352 return -EFAULT; 1353 return 0; 1354 } 1355 1356 STATIC int 1357 xfs_ioc_setxflags( 1358 xfs_inode_t *ip, 1359 struct file *filp, 1360 void __user *arg) 1361 { 1362 struct fsxattr fa; 1363 unsigned int flags; 1364 unsigned int mask; 1365 int error; 1366 1367 if (copy_from_user(&flags, arg, sizeof(flags))) 1368 return -EFAULT; 1369 1370 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1371 FS_NOATIME_FL | FS_NODUMP_FL | \ 1372 FS_SYNC_FL)) 1373 return -EOPNOTSUPP; 1374 1375 mask = FSX_XFLAGS; 1376 if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) 1377 mask |= FSX_NONBLOCK; 1378 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1379 1380 error = mnt_want_write_file(filp); 1381 if (error) 1382 return error; 1383 error = xfs_ioctl_setattr(ip, &fa, mask); 1384 mnt_drop_write_file(filp); 1385 return -error; 1386 } 1387 1388 STATIC int 1389 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) 1390 { 1391 struct getbmap __user *base = *ap; 1392 1393 /* copy only getbmap portion (not getbmapx) */ 1394 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1395 return XFS_ERROR(EFAULT); 1396 1397 *ap += sizeof(struct getbmap); 1398 return 0; 1399 } 1400 1401 STATIC int 1402 xfs_ioc_getbmap( 1403 struct xfs_inode *ip, 1404 int ioflags, 1405 unsigned int cmd, 1406 void __user *arg) 1407 { 1408 struct getbmapx bmx; 1409 int error; 1410 1411 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) 1412 return -XFS_ERROR(EFAULT); 1413 1414 if (bmx.bmv_count < 2) 1415 return -XFS_ERROR(EINVAL); 1416 1417 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1418 if (ioflags & IO_INVIS) 1419 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1420 1421 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, 1422 (struct getbmap *)arg+1); 1423 if (error) 1424 return -error; 1425 1426 /* copy back header - only size of getbmap */ 1427 if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) 1428 return -XFS_ERROR(EFAULT); 1429 return 0; 1430 } 1431 1432 STATIC int 1433 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) 1434 { 1435 struct getbmapx __user *base = *ap; 1436 1437 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1438 return XFS_ERROR(EFAULT); 1439 1440 *ap += sizeof(struct getbmapx); 1441 return 0; 1442 } 1443 1444 STATIC int 1445 xfs_ioc_getbmapx( 1446 struct xfs_inode *ip, 1447 void __user *arg) 1448 { 1449 struct getbmapx bmx; 1450 int error; 1451 1452 if (copy_from_user(&bmx, arg, sizeof(bmx))) 1453 return -XFS_ERROR(EFAULT); 1454 1455 if (bmx.bmv_count < 2) 1456 return -XFS_ERROR(EINVAL); 1457 1458 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1459 return -XFS_ERROR(EINVAL); 1460 1461 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1462 (struct getbmapx *)arg+1); 1463 if (error) 1464 return -error; 1465 1466 /* copy back header */ 1467 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) 1468 return -XFS_ERROR(EFAULT); 1469 1470 return 0; 1471 } 1472 1473 int 1474 xfs_ioc_swapext( 1475 xfs_swapext_t *sxp) 1476 { 1477 xfs_inode_t *ip, *tip; 1478 struct fd f, tmp; 1479 int error = 0; 1480 1481 /* Pull information for the target fd */ 1482 f = fdget((int)sxp->sx_fdtarget); 1483 if (!f.file) { 1484 error = XFS_ERROR(EINVAL); 1485 goto out; 1486 } 1487 1488 if (!(f.file->f_mode & FMODE_WRITE) || 1489 !(f.file->f_mode & FMODE_READ) || 1490 (f.file->f_flags & O_APPEND)) { 1491 error = XFS_ERROR(EBADF); 1492 goto out_put_file; 1493 } 1494 1495 tmp = fdget((int)sxp->sx_fdtmp); 1496 if (!tmp.file) { 1497 error = XFS_ERROR(EINVAL); 1498 goto out_put_file; 1499 } 1500 1501 if (!(tmp.file->f_mode & FMODE_WRITE) || 1502 !(tmp.file->f_mode & FMODE_READ) || 1503 (tmp.file->f_flags & O_APPEND)) { 1504 error = XFS_ERROR(EBADF); 1505 goto out_put_tmp_file; 1506 } 1507 1508 if (IS_SWAPFILE(file_inode(f.file)) || 1509 IS_SWAPFILE(file_inode(tmp.file))) { 1510 error = XFS_ERROR(EINVAL); 1511 goto out_put_tmp_file; 1512 } 1513 1514 ip = XFS_I(file_inode(f.file)); 1515 tip = XFS_I(file_inode(tmp.file)); 1516 1517 if (ip->i_mount != tip->i_mount) { 1518 error = XFS_ERROR(EINVAL); 1519 goto out_put_tmp_file; 1520 } 1521 1522 if (ip->i_ino == tip->i_ino) { 1523 error = XFS_ERROR(EINVAL); 1524 goto out_put_tmp_file; 1525 } 1526 1527 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1528 error = XFS_ERROR(EIO); 1529 goto out_put_tmp_file; 1530 } 1531 1532 error = xfs_swap_extents(ip, tip, sxp); 1533 1534 out_put_tmp_file: 1535 fdput(tmp); 1536 out_put_file: 1537 fdput(f); 1538 out: 1539 return error; 1540 } 1541 1542 /* 1543 * Note: some of the ioctl's return positive numbers as a 1544 * byte count indicating success, such as readlink_by_handle. 1545 * So we don't "sign flip" like most other routines. This means 1546 * true errors need to be returned as a negative value. 1547 */ 1548 long 1549 xfs_file_ioctl( 1550 struct file *filp, 1551 unsigned int cmd, 1552 unsigned long p) 1553 { 1554 struct inode *inode = file_inode(filp); 1555 struct xfs_inode *ip = XFS_I(inode); 1556 struct xfs_mount *mp = ip->i_mount; 1557 void __user *arg = (void __user *)p; 1558 int ioflags = 0; 1559 int error; 1560 1561 if (filp->f_mode & FMODE_NOCMTIME) 1562 ioflags |= IO_INVIS; 1563 1564 trace_xfs_file_ioctl(ip); 1565 1566 switch (cmd) { 1567 case FITRIM: 1568 return xfs_ioc_trim(mp, arg); 1569 case XFS_IOC_ALLOCSP: 1570 case XFS_IOC_FREESP: 1571 case XFS_IOC_RESVSP: 1572 case XFS_IOC_UNRESVSP: 1573 case XFS_IOC_ALLOCSP64: 1574 case XFS_IOC_FREESP64: 1575 case XFS_IOC_RESVSP64: 1576 case XFS_IOC_UNRESVSP64: 1577 case XFS_IOC_ZERO_RANGE: { 1578 xfs_flock64_t bf; 1579 1580 if (copy_from_user(&bf, arg, sizeof(bf))) 1581 return -XFS_ERROR(EFAULT); 1582 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf); 1583 } 1584 case XFS_IOC_DIOINFO: { 1585 struct dioattr da; 1586 xfs_buftarg_t *target = 1587 XFS_IS_REALTIME_INODE(ip) ? 1588 mp->m_rtdev_targp : mp->m_ddev_targp; 1589 1590 da.d_mem = da.d_miniosz = 1 << target->bt_sshift; 1591 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1592 1593 if (copy_to_user(arg, &da, sizeof(da))) 1594 return -XFS_ERROR(EFAULT); 1595 return 0; 1596 } 1597 1598 case XFS_IOC_FSBULKSTAT_SINGLE: 1599 case XFS_IOC_FSBULKSTAT: 1600 case XFS_IOC_FSINUMBERS: 1601 return xfs_ioc_bulkstat(mp, cmd, arg); 1602 1603 case XFS_IOC_FSGEOMETRY_V1: 1604 return xfs_ioc_fsgeometry_v1(mp, arg); 1605 1606 case XFS_IOC_FSGEOMETRY: 1607 return xfs_ioc_fsgeometry(mp, arg); 1608 1609 case XFS_IOC_GETVERSION: 1610 return put_user(inode->i_generation, (int __user *)arg); 1611 1612 case XFS_IOC_FSGETXATTR: 1613 return xfs_ioc_fsgetxattr(ip, 0, arg); 1614 case XFS_IOC_FSGETXATTRA: 1615 return xfs_ioc_fsgetxattr(ip, 1, arg); 1616 case XFS_IOC_FSSETXATTR: 1617 return xfs_ioc_fssetxattr(ip, filp, arg); 1618 case XFS_IOC_GETXFLAGS: 1619 return xfs_ioc_getxflags(ip, arg); 1620 case XFS_IOC_SETXFLAGS: 1621 return xfs_ioc_setxflags(ip, filp, arg); 1622 1623 case XFS_IOC_FSSETDM: { 1624 struct fsdmidata dmi; 1625 1626 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1627 return -XFS_ERROR(EFAULT); 1628 1629 error = mnt_want_write_file(filp); 1630 if (error) 1631 return error; 1632 1633 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1634 dmi.fsd_dmstate); 1635 mnt_drop_write_file(filp); 1636 return -error; 1637 } 1638 1639 case XFS_IOC_GETBMAP: 1640 case XFS_IOC_GETBMAPA: 1641 return xfs_ioc_getbmap(ip, ioflags, cmd, arg); 1642 1643 case XFS_IOC_GETBMAPX: 1644 return xfs_ioc_getbmapx(ip, arg); 1645 1646 case XFS_IOC_FD_TO_HANDLE: 1647 case XFS_IOC_PATH_TO_HANDLE: 1648 case XFS_IOC_PATH_TO_FSHANDLE: { 1649 xfs_fsop_handlereq_t hreq; 1650 1651 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1652 return -XFS_ERROR(EFAULT); 1653 return xfs_find_handle(cmd, &hreq); 1654 } 1655 case XFS_IOC_OPEN_BY_HANDLE: { 1656 xfs_fsop_handlereq_t hreq; 1657 1658 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1659 return -XFS_ERROR(EFAULT); 1660 return xfs_open_by_handle(filp, &hreq); 1661 } 1662 case XFS_IOC_FSSETDM_BY_HANDLE: 1663 return xfs_fssetdm_by_handle(filp, arg); 1664 1665 case XFS_IOC_READLINK_BY_HANDLE: { 1666 xfs_fsop_handlereq_t hreq; 1667 1668 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1669 return -XFS_ERROR(EFAULT); 1670 return xfs_readlink_by_handle(filp, &hreq); 1671 } 1672 case XFS_IOC_ATTRLIST_BY_HANDLE: 1673 return xfs_attrlist_by_handle(filp, arg); 1674 1675 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1676 return xfs_attrmulti_by_handle(filp, arg); 1677 1678 case XFS_IOC_SWAPEXT: { 1679 struct xfs_swapext sxp; 1680 1681 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1682 return -XFS_ERROR(EFAULT); 1683 error = mnt_want_write_file(filp); 1684 if (error) 1685 return error; 1686 error = xfs_ioc_swapext(&sxp); 1687 mnt_drop_write_file(filp); 1688 return -error; 1689 } 1690 1691 case XFS_IOC_FSCOUNTS: { 1692 xfs_fsop_counts_t out; 1693 1694 error = xfs_fs_counts(mp, &out); 1695 if (error) 1696 return -error; 1697 1698 if (copy_to_user(arg, &out, sizeof(out))) 1699 return -XFS_ERROR(EFAULT); 1700 return 0; 1701 } 1702 1703 case XFS_IOC_SET_RESBLKS: { 1704 xfs_fsop_resblks_t inout; 1705 __uint64_t in; 1706 1707 if (!capable(CAP_SYS_ADMIN)) 1708 return -EPERM; 1709 1710 if (mp->m_flags & XFS_MOUNT_RDONLY) 1711 return -XFS_ERROR(EROFS); 1712 1713 if (copy_from_user(&inout, arg, sizeof(inout))) 1714 return -XFS_ERROR(EFAULT); 1715 1716 error = mnt_want_write_file(filp); 1717 if (error) 1718 return error; 1719 1720 /* input parameter is passed in resblks field of structure */ 1721 in = inout.resblks; 1722 error = xfs_reserve_blocks(mp, &in, &inout); 1723 mnt_drop_write_file(filp); 1724 if (error) 1725 return -error; 1726 1727 if (copy_to_user(arg, &inout, sizeof(inout))) 1728 return -XFS_ERROR(EFAULT); 1729 return 0; 1730 } 1731 1732 case XFS_IOC_GET_RESBLKS: { 1733 xfs_fsop_resblks_t out; 1734 1735 if (!capable(CAP_SYS_ADMIN)) 1736 return -EPERM; 1737 1738 error = xfs_reserve_blocks(mp, NULL, &out); 1739 if (error) 1740 return -error; 1741 1742 if (copy_to_user(arg, &out, sizeof(out))) 1743 return -XFS_ERROR(EFAULT); 1744 1745 return 0; 1746 } 1747 1748 case XFS_IOC_FSGROWFSDATA: { 1749 xfs_growfs_data_t in; 1750 1751 if (copy_from_user(&in, arg, sizeof(in))) 1752 return -XFS_ERROR(EFAULT); 1753 1754 error = mnt_want_write_file(filp); 1755 if (error) 1756 return error; 1757 error = xfs_growfs_data(mp, &in); 1758 mnt_drop_write_file(filp); 1759 return -error; 1760 } 1761 1762 case XFS_IOC_FSGROWFSLOG: { 1763 xfs_growfs_log_t in; 1764 1765 if (copy_from_user(&in, arg, sizeof(in))) 1766 return -XFS_ERROR(EFAULT); 1767 1768 error = mnt_want_write_file(filp); 1769 if (error) 1770 return error; 1771 error = xfs_growfs_log(mp, &in); 1772 mnt_drop_write_file(filp); 1773 return -error; 1774 } 1775 1776 case XFS_IOC_FSGROWFSRT: { 1777 xfs_growfs_rt_t in; 1778 1779 if (copy_from_user(&in, arg, sizeof(in))) 1780 return -XFS_ERROR(EFAULT); 1781 1782 error = mnt_want_write_file(filp); 1783 if (error) 1784 return error; 1785 error = xfs_growfs_rt(mp, &in); 1786 mnt_drop_write_file(filp); 1787 return -error; 1788 } 1789 1790 case XFS_IOC_GOINGDOWN: { 1791 __uint32_t in; 1792 1793 if (!capable(CAP_SYS_ADMIN)) 1794 return -EPERM; 1795 1796 if (get_user(in, (__uint32_t __user *)arg)) 1797 return -XFS_ERROR(EFAULT); 1798 1799 error = xfs_fs_goingdown(mp, in); 1800 return -error; 1801 } 1802 1803 case XFS_IOC_ERROR_INJECTION: { 1804 xfs_error_injection_t in; 1805 1806 if (!capable(CAP_SYS_ADMIN)) 1807 return -EPERM; 1808 1809 if (copy_from_user(&in, arg, sizeof(in))) 1810 return -XFS_ERROR(EFAULT); 1811 1812 error = xfs_errortag_add(in.errtag, mp); 1813 return -error; 1814 } 1815 1816 case XFS_IOC_ERROR_CLEARALL: 1817 if (!capable(CAP_SYS_ADMIN)) 1818 return -EPERM; 1819 1820 error = xfs_errortag_clearall(mp, 1); 1821 return -error; 1822 1823 case XFS_IOC_FREE_EOFBLOCKS: { 1824 struct xfs_fs_eofblocks eofb; 1825 struct xfs_eofblocks keofb; 1826 1827 if (!capable(CAP_SYS_ADMIN)) 1828 return -EPERM; 1829 1830 if (mp->m_flags & XFS_MOUNT_RDONLY) 1831 return -XFS_ERROR(EROFS); 1832 1833 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1834 return -XFS_ERROR(EFAULT); 1835 1836 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 1837 if (error) 1838 return -error; 1839 1840 return -xfs_icache_free_eofblocks(mp, &keofb); 1841 } 1842 1843 default: 1844 return -ENOTTY; 1845 } 1846 } 1847