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 > XATTR_LIST_MAX) 446 return -XFS_ERROR(EINVAL); 447 448 /* 449 * Reject flags, only allow namespaces. 450 */ 451 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 452 return -XFS_ERROR(EINVAL); 453 454 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 455 if (IS_ERR(dentry)) 456 return PTR_ERR(dentry); 457 458 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); 459 if (!kbuf) 460 goto out_dput; 461 462 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 463 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen, 464 al_hreq.flags, cursor); 465 if (error) 466 goto out_kfree; 467 468 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 469 error = -EFAULT; 470 471 out_kfree: 472 kmem_free(kbuf); 473 out_dput: 474 dput(dentry); 475 return error; 476 } 477 478 int 479 xfs_attrmulti_attr_get( 480 struct inode *inode, 481 unsigned char *name, 482 unsigned char __user *ubuf, 483 __uint32_t *len, 484 __uint32_t flags) 485 { 486 unsigned char *kbuf; 487 int error = EFAULT; 488 489 if (*len > XATTR_SIZE_MAX) 490 return EINVAL; 491 kbuf = kmem_zalloc_large(*len, KM_SLEEP); 492 if (!kbuf) 493 return ENOMEM; 494 495 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); 496 if (error) 497 goto out_kfree; 498 499 if (copy_to_user(ubuf, kbuf, *len)) 500 error = EFAULT; 501 502 out_kfree: 503 kmem_free(kbuf); 504 return error; 505 } 506 507 int 508 xfs_attrmulti_attr_set( 509 struct inode *inode, 510 unsigned char *name, 511 const unsigned char __user *ubuf, 512 __uint32_t len, 513 __uint32_t flags) 514 { 515 unsigned char *kbuf; 516 int error = EFAULT; 517 518 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 519 return EPERM; 520 if (len > XATTR_SIZE_MAX) 521 return EINVAL; 522 523 kbuf = memdup_user(ubuf, len); 524 if (IS_ERR(kbuf)) 525 return PTR_ERR(kbuf); 526 527 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 528 529 return error; 530 } 531 532 int 533 xfs_attrmulti_attr_remove( 534 struct inode *inode, 535 unsigned char *name, 536 __uint32_t flags) 537 { 538 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 539 return EPERM; 540 return xfs_attr_remove(XFS_I(inode), name, flags); 541 } 542 543 STATIC int 544 xfs_attrmulti_by_handle( 545 struct file *parfilp, 546 void __user *arg) 547 { 548 int error; 549 xfs_attr_multiop_t *ops; 550 xfs_fsop_attrmulti_handlereq_t am_hreq; 551 struct dentry *dentry; 552 unsigned int i, size; 553 unsigned char *attr_name; 554 555 if (!capable(CAP_SYS_ADMIN)) 556 return -XFS_ERROR(EPERM); 557 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 558 return -XFS_ERROR(EFAULT); 559 560 /* overflow check */ 561 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 562 return -E2BIG; 563 564 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 565 if (IS_ERR(dentry)) 566 return PTR_ERR(dentry); 567 568 error = E2BIG; 569 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 570 if (!size || size > 16 * PAGE_SIZE) 571 goto out_dput; 572 573 ops = memdup_user(am_hreq.ops, size); 574 if (IS_ERR(ops)) { 575 error = PTR_ERR(ops); 576 goto out_dput; 577 } 578 579 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 580 if (!attr_name) 581 goto out_kfree_ops; 582 583 error = 0; 584 for (i = 0; i < am_hreq.opcount; i++) { 585 ops[i].am_error = strncpy_from_user((char *)attr_name, 586 ops[i].am_attrname, MAXNAMELEN); 587 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 588 error = -ERANGE; 589 if (ops[i].am_error < 0) 590 break; 591 592 switch (ops[i].am_opcode) { 593 case ATTR_OP_GET: 594 ops[i].am_error = xfs_attrmulti_attr_get( 595 dentry->d_inode, attr_name, 596 ops[i].am_attrvalue, &ops[i].am_length, 597 ops[i].am_flags); 598 break; 599 case ATTR_OP_SET: 600 ops[i].am_error = mnt_want_write_file(parfilp); 601 if (ops[i].am_error) 602 break; 603 ops[i].am_error = xfs_attrmulti_attr_set( 604 dentry->d_inode, attr_name, 605 ops[i].am_attrvalue, ops[i].am_length, 606 ops[i].am_flags); 607 mnt_drop_write_file(parfilp); 608 break; 609 case ATTR_OP_REMOVE: 610 ops[i].am_error = mnt_want_write_file(parfilp); 611 if (ops[i].am_error) 612 break; 613 ops[i].am_error = xfs_attrmulti_attr_remove( 614 dentry->d_inode, attr_name, 615 ops[i].am_flags); 616 mnt_drop_write_file(parfilp); 617 break; 618 default: 619 ops[i].am_error = EINVAL; 620 } 621 } 622 623 if (copy_to_user(am_hreq.ops, ops, size)) 624 error = XFS_ERROR(EFAULT); 625 626 kfree(attr_name); 627 out_kfree_ops: 628 kfree(ops); 629 out_dput: 630 dput(dentry); 631 return -error; 632 } 633 634 int 635 xfs_ioc_space( 636 struct xfs_inode *ip, 637 struct inode *inode, 638 struct file *filp, 639 int ioflags, 640 unsigned int cmd, 641 xfs_flock64_t *bf) 642 { 643 struct xfs_mount *mp = ip->i_mount; 644 struct xfs_trans *tp; 645 struct iattr iattr; 646 bool setprealloc = false; 647 bool clrprealloc = false; 648 int error; 649 650 /* 651 * Only allow the sys admin to reserve space unless 652 * unwritten extents are enabled. 653 */ 654 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && 655 !capable(CAP_SYS_ADMIN)) 656 return -XFS_ERROR(EPERM); 657 658 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 659 return -XFS_ERROR(EPERM); 660 661 if (!(filp->f_mode & FMODE_WRITE)) 662 return -XFS_ERROR(EBADF); 663 664 if (!S_ISREG(inode->i_mode)) 665 return -XFS_ERROR(EINVAL); 666 667 error = mnt_want_write_file(filp); 668 if (error) 669 return error; 670 671 xfs_ilock(ip, XFS_IOLOCK_EXCL); 672 673 switch (bf->l_whence) { 674 case 0: /*SEEK_SET*/ 675 break; 676 case 1: /*SEEK_CUR*/ 677 bf->l_start += filp->f_pos; 678 break; 679 case 2: /*SEEK_END*/ 680 bf->l_start += XFS_ISIZE(ip); 681 break; 682 default: 683 error = XFS_ERROR(EINVAL); 684 goto out_unlock; 685 } 686 687 /* 688 * length of <= 0 for resv/unresv/zero is invalid. length for 689 * alloc/free is ignored completely and we have no idea what userspace 690 * might have set it to, so set it to zero to allow range 691 * checks to pass. 692 */ 693 switch (cmd) { 694 case XFS_IOC_ZERO_RANGE: 695 case XFS_IOC_RESVSP: 696 case XFS_IOC_RESVSP64: 697 case XFS_IOC_UNRESVSP: 698 case XFS_IOC_UNRESVSP64: 699 if (bf->l_len <= 0) { 700 error = XFS_ERROR(EINVAL); 701 goto out_unlock; 702 } 703 break; 704 default: 705 bf->l_len = 0; 706 break; 707 } 708 709 if (bf->l_start < 0 || 710 bf->l_start > mp->m_super->s_maxbytes || 711 bf->l_start + bf->l_len < 0 || 712 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) { 713 error = XFS_ERROR(EINVAL); 714 goto out_unlock; 715 } 716 717 switch (cmd) { 718 case XFS_IOC_ZERO_RANGE: 719 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); 720 if (!error) 721 setprealloc = true; 722 break; 723 case XFS_IOC_RESVSP: 724 case XFS_IOC_RESVSP64: 725 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, 726 XFS_BMAPI_PREALLOC); 727 if (!error) 728 setprealloc = true; 729 break; 730 case XFS_IOC_UNRESVSP: 731 case XFS_IOC_UNRESVSP64: 732 error = xfs_free_file_space(ip, bf->l_start, bf->l_len); 733 break; 734 case XFS_IOC_ALLOCSP: 735 case XFS_IOC_ALLOCSP64: 736 case XFS_IOC_FREESP: 737 case XFS_IOC_FREESP64: 738 if (bf->l_start > XFS_ISIZE(ip)) { 739 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 740 bf->l_start - XFS_ISIZE(ip), 0); 741 if (error) 742 goto out_unlock; 743 } 744 745 iattr.ia_valid = ATTR_SIZE; 746 iattr.ia_size = bf->l_start; 747 748 error = xfs_setattr_size(ip, &iattr); 749 if (!error) 750 clrprealloc = true; 751 break; 752 default: 753 ASSERT(0); 754 error = XFS_ERROR(EINVAL); 755 } 756 757 if (error) 758 goto out_unlock; 759 760 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); 761 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0); 762 if (error) { 763 xfs_trans_cancel(tp, 0); 764 goto out_unlock; 765 } 766 767 xfs_ilock(ip, XFS_ILOCK_EXCL); 768 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 769 770 if (!(ioflags & IO_INVIS)) { 771 ip->i_d.di_mode &= ~S_ISUID; 772 if (ip->i_d.di_mode & S_IXGRP) 773 ip->i_d.di_mode &= ~S_ISGID; 774 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); 775 } 776 777 if (setprealloc) 778 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; 779 else if (clrprealloc) 780 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; 781 782 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 783 if (filp->f_flags & O_DSYNC) 784 xfs_trans_set_sync(tp); 785 error = xfs_trans_commit(tp, 0); 786 787 out_unlock: 788 xfs_iunlock(ip, XFS_IOLOCK_EXCL); 789 mnt_drop_write_file(filp); 790 return -error; 791 } 792 793 STATIC int 794 xfs_ioc_bulkstat( 795 xfs_mount_t *mp, 796 unsigned int cmd, 797 void __user *arg) 798 { 799 xfs_fsop_bulkreq_t bulkreq; 800 int count; /* # of records returned */ 801 xfs_ino_t inlast; /* last inode number */ 802 int done; 803 int error; 804 805 /* done = 1 if there are more stats to get and if bulkstat */ 806 /* should be called again (unused here, but used in dmapi) */ 807 808 if (!capable(CAP_SYS_ADMIN)) 809 return -EPERM; 810 811 if (XFS_FORCED_SHUTDOWN(mp)) 812 return -XFS_ERROR(EIO); 813 814 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) 815 return -XFS_ERROR(EFAULT); 816 817 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) 818 return -XFS_ERROR(EFAULT); 819 820 if ((count = bulkreq.icount) <= 0) 821 return -XFS_ERROR(EINVAL); 822 823 if (bulkreq.ubuffer == NULL) 824 return -XFS_ERROR(EINVAL); 825 826 if (cmd == XFS_IOC_FSINUMBERS) 827 error = xfs_inumbers(mp, &inlast, &count, 828 bulkreq.ubuffer, xfs_inumbers_fmt); 829 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) 830 error = xfs_bulkstat_single(mp, &inlast, 831 bulkreq.ubuffer, &done); 832 else /* XFS_IOC_FSBULKSTAT */ 833 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, 834 sizeof(xfs_bstat_t), bulkreq.ubuffer, 835 &done); 836 837 if (error) 838 return -error; 839 840 if (bulkreq.ocount != NULL) { 841 if (copy_to_user(bulkreq.lastip, &inlast, 842 sizeof(xfs_ino_t))) 843 return -XFS_ERROR(EFAULT); 844 845 if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) 846 return -XFS_ERROR(EFAULT); 847 } 848 849 return 0; 850 } 851 852 STATIC int 853 xfs_ioc_fsgeometry_v1( 854 xfs_mount_t *mp, 855 void __user *arg) 856 { 857 xfs_fsop_geom_t fsgeo; 858 int error; 859 860 error = xfs_fs_geometry(mp, &fsgeo, 3); 861 if (error) 862 return -error; 863 864 /* 865 * Caller should have passed an argument of type 866 * xfs_fsop_geom_v1_t. This is a proper subset of the 867 * xfs_fsop_geom_t that xfs_fs_geometry() fills in. 868 */ 869 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) 870 return -XFS_ERROR(EFAULT); 871 return 0; 872 } 873 874 STATIC int 875 xfs_ioc_fsgeometry( 876 xfs_mount_t *mp, 877 void __user *arg) 878 { 879 xfs_fsop_geom_t fsgeo; 880 int error; 881 882 error = xfs_fs_geometry(mp, &fsgeo, 4); 883 if (error) 884 return -error; 885 886 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) 887 return -XFS_ERROR(EFAULT); 888 return 0; 889 } 890 891 /* 892 * Linux extended inode flags interface. 893 */ 894 895 STATIC unsigned int 896 xfs_merge_ioc_xflags( 897 unsigned int flags, 898 unsigned int start) 899 { 900 unsigned int xflags = start; 901 902 if (flags & FS_IMMUTABLE_FL) 903 xflags |= XFS_XFLAG_IMMUTABLE; 904 else 905 xflags &= ~XFS_XFLAG_IMMUTABLE; 906 if (flags & FS_APPEND_FL) 907 xflags |= XFS_XFLAG_APPEND; 908 else 909 xflags &= ~XFS_XFLAG_APPEND; 910 if (flags & FS_SYNC_FL) 911 xflags |= XFS_XFLAG_SYNC; 912 else 913 xflags &= ~XFS_XFLAG_SYNC; 914 if (flags & FS_NOATIME_FL) 915 xflags |= XFS_XFLAG_NOATIME; 916 else 917 xflags &= ~XFS_XFLAG_NOATIME; 918 if (flags & FS_NODUMP_FL) 919 xflags |= XFS_XFLAG_NODUMP; 920 else 921 xflags &= ~XFS_XFLAG_NODUMP; 922 923 return xflags; 924 } 925 926 STATIC unsigned int 927 xfs_di2lxflags( 928 __uint16_t di_flags) 929 { 930 unsigned int flags = 0; 931 932 if (di_flags & XFS_DIFLAG_IMMUTABLE) 933 flags |= FS_IMMUTABLE_FL; 934 if (di_flags & XFS_DIFLAG_APPEND) 935 flags |= FS_APPEND_FL; 936 if (di_flags & XFS_DIFLAG_SYNC) 937 flags |= FS_SYNC_FL; 938 if (di_flags & XFS_DIFLAG_NOATIME) 939 flags |= FS_NOATIME_FL; 940 if (di_flags & XFS_DIFLAG_NODUMP) 941 flags |= FS_NODUMP_FL; 942 return flags; 943 } 944 945 STATIC int 946 xfs_ioc_fsgetxattr( 947 xfs_inode_t *ip, 948 int attr, 949 void __user *arg) 950 { 951 struct fsxattr fa; 952 953 memset(&fa, 0, sizeof(struct fsxattr)); 954 955 xfs_ilock(ip, XFS_ILOCK_SHARED); 956 fa.fsx_xflags = xfs_ip2xflags(ip); 957 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 958 fa.fsx_projid = xfs_get_projid(ip); 959 960 if (attr) { 961 if (ip->i_afp) { 962 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 963 fa.fsx_nextents = ip->i_afp->if_bytes / 964 sizeof(xfs_bmbt_rec_t); 965 else 966 fa.fsx_nextents = ip->i_d.di_anextents; 967 } else 968 fa.fsx_nextents = 0; 969 } else { 970 if (ip->i_df.if_flags & XFS_IFEXTENTS) 971 fa.fsx_nextents = ip->i_df.if_bytes / 972 sizeof(xfs_bmbt_rec_t); 973 else 974 fa.fsx_nextents = ip->i_d.di_nextents; 975 } 976 xfs_iunlock(ip, XFS_ILOCK_SHARED); 977 978 if (copy_to_user(arg, &fa, sizeof(fa))) 979 return -EFAULT; 980 return 0; 981 } 982 983 STATIC void 984 xfs_set_diflags( 985 struct xfs_inode *ip, 986 unsigned int xflags) 987 { 988 unsigned int di_flags; 989 990 /* can't set PREALLOC this way, just preserve it */ 991 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 992 if (xflags & XFS_XFLAG_IMMUTABLE) 993 di_flags |= XFS_DIFLAG_IMMUTABLE; 994 if (xflags & XFS_XFLAG_APPEND) 995 di_flags |= XFS_DIFLAG_APPEND; 996 if (xflags & XFS_XFLAG_SYNC) 997 di_flags |= XFS_DIFLAG_SYNC; 998 if (xflags & XFS_XFLAG_NOATIME) 999 di_flags |= XFS_DIFLAG_NOATIME; 1000 if (xflags & XFS_XFLAG_NODUMP) 1001 di_flags |= XFS_DIFLAG_NODUMP; 1002 if (xflags & XFS_XFLAG_PROJINHERIT) 1003 di_flags |= XFS_DIFLAG_PROJINHERIT; 1004 if (xflags & XFS_XFLAG_NODEFRAG) 1005 di_flags |= XFS_DIFLAG_NODEFRAG; 1006 if (xflags & XFS_XFLAG_FILESTREAM) 1007 di_flags |= XFS_DIFLAG_FILESTREAM; 1008 if (S_ISDIR(ip->i_d.di_mode)) { 1009 if (xflags & XFS_XFLAG_RTINHERIT) 1010 di_flags |= XFS_DIFLAG_RTINHERIT; 1011 if (xflags & XFS_XFLAG_NOSYMLINKS) 1012 di_flags |= XFS_DIFLAG_NOSYMLINKS; 1013 if (xflags & XFS_XFLAG_EXTSZINHERIT) 1014 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 1015 } else if (S_ISREG(ip->i_d.di_mode)) { 1016 if (xflags & XFS_XFLAG_REALTIME) 1017 di_flags |= XFS_DIFLAG_REALTIME; 1018 if (xflags & XFS_XFLAG_EXTSIZE) 1019 di_flags |= XFS_DIFLAG_EXTSIZE; 1020 } 1021 1022 ip->i_d.di_flags = di_flags; 1023 } 1024 1025 STATIC void 1026 xfs_diflags_to_linux( 1027 struct xfs_inode *ip) 1028 { 1029 struct inode *inode = VFS_I(ip); 1030 unsigned int xflags = xfs_ip2xflags(ip); 1031 1032 if (xflags & XFS_XFLAG_IMMUTABLE) 1033 inode->i_flags |= S_IMMUTABLE; 1034 else 1035 inode->i_flags &= ~S_IMMUTABLE; 1036 if (xflags & XFS_XFLAG_APPEND) 1037 inode->i_flags |= S_APPEND; 1038 else 1039 inode->i_flags &= ~S_APPEND; 1040 if (xflags & XFS_XFLAG_SYNC) 1041 inode->i_flags |= S_SYNC; 1042 else 1043 inode->i_flags &= ~S_SYNC; 1044 if (xflags & XFS_XFLAG_NOATIME) 1045 inode->i_flags |= S_NOATIME; 1046 else 1047 inode->i_flags &= ~S_NOATIME; 1048 } 1049 1050 #define FSX_PROJID 1 1051 #define FSX_EXTSIZE 2 1052 #define FSX_XFLAGS 4 1053 #define FSX_NONBLOCK 8 1054 1055 STATIC int 1056 xfs_ioctl_setattr( 1057 xfs_inode_t *ip, 1058 struct fsxattr *fa, 1059 int mask) 1060 { 1061 struct xfs_mount *mp = ip->i_mount; 1062 struct xfs_trans *tp; 1063 unsigned int lock_flags = 0; 1064 struct xfs_dquot *udqp = NULL; 1065 struct xfs_dquot *pdqp = NULL; 1066 struct xfs_dquot *olddquot = NULL; 1067 int code; 1068 1069 trace_xfs_ioctl_setattr(ip); 1070 1071 if (mp->m_flags & XFS_MOUNT_RDONLY) 1072 return XFS_ERROR(EROFS); 1073 if (XFS_FORCED_SHUTDOWN(mp)) 1074 return XFS_ERROR(EIO); 1075 1076 /* 1077 * Disallow 32bit project ids when projid32bit feature is not enabled. 1078 */ 1079 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) && 1080 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1081 return XFS_ERROR(EINVAL); 1082 1083 /* 1084 * If disk quotas is on, we make sure that the dquots do exist on disk, 1085 * before we start any other transactions. Trying to do this later 1086 * is messy. We don't care to take a readlock to look at the ids 1087 * in inode here, because we can't hold it across the trans_reserve. 1088 * If the IDs do change before we take the ilock, we're covered 1089 * because the i_*dquot fields will get updated anyway. 1090 */ 1091 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) { 1092 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1093 ip->i_d.di_gid, fa->fsx_projid, 1094 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1095 if (code) 1096 return code; 1097 } 1098 1099 /* 1100 * For the other attributes, we acquire the inode lock and 1101 * first do an error checking pass. 1102 */ 1103 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); 1104 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); 1105 if (code) 1106 goto error_return; 1107 1108 lock_flags = XFS_ILOCK_EXCL; 1109 xfs_ilock(ip, lock_flags); 1110 1111 /* 1112 * CAP_FOWNER overrides the following restrictions: 1113 * 1114 * The user ID of the calling process must be equal 1115 * to the file owner ID, except in cases where the 1116 * CAP_FSETID capability is applicable. 1117 */ 1118 if (!inode_owner_or_capable(VFS_I(ip))) { 1119 code = XFS_ERROR(EPERM); 1120 goto error_return; 1121 } 1122 1123 /* 1124 * Do a quota reservation only if projid is actually going to change. 1125 * Only allow changing of projid from init_user_ns since it is a 1126 * non user namespace aware identifier. 1127 */ 1128 if (mask & FSX_PROJID) { 1129 if (current_user_ns() != &init_user_ns) { 1130 code = XFS_ERROR(EINVAL); 1131 goto error_return; 1132 } 1133 1134 if (XFS_IS_QUOTA_RUNNING(mp) && 1135 XFS_IS_PQUOTA_ON(mp) && 1136 xfs_get_projid(ip) != fa->fsx_projid) { 1137 ASSERT(tp); 1138 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, 1139 pdqp, capable(CAP_FOWNER) ? 1140 XFS_QMOPT_FORCE_RES : 0); 1141 if (code) /* out of quota */ 1142 goto error_return; 1143 } 1144 } 1145 1146 if (mask & FSX_EXTSIZE) { 1147 /* 1148 * Can't change extent size if any extents are allocated. 1149 */ 1150 if (ip->i_d.di_nextents && 1151 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != 1152 fa->fsx_extsize)) { 1153 code = XFS_ERROR(EINVAL); /* EFBIG? */ 1154 goto error_return; 1155 } 1156 1157 /* 1158 * Extent size must be a multiple of the appropriate block 1159 * size, if set at all. It must also be smaller than the 1160 * maximum extent size supported by the filesystem. 1161 * 1162 * Also, for non-realtime files, limit the extent size hint to 1163 * half the size of the AGs in the filesystem so alignment 1164 * doesn't result in extents larger than an AG. 1165 */ 1166 if (fa->fsx_extsize != 0) { 1167 xfs_extlen_t size; 1168 xfs_fsblock_t extsize_fsb; 1169 1170 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1171 if (extsize_fsb > MAXEXTLEN) { 1172 code = XFS_ERROR(EINVAL); 1173 goto error_return; 1174 } 1175 1176 if (XFS_IS_REALTIME_INODE(ip) || 1177 ((mask & FSX_XFLAGS) && 1178 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) { 1179 size = mp->m_sb.sb_rextsize << 1180 mp->m_sb.sb_blocklog; 1181 } else { 1182 size = mp->m_sb.sb_blocksize; 1183 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) { 1184 code = XFS_ERROR(EINVAL); 1185 goto error_return; 1186 } 1187 } 1188 1189 if (fa->fsx_extsize % size) { 1190 code = XFS_ERROR(EINVAL); 1191 goto error_return; 1192 } 1193 } 1194 } 1195 1196 1197 if (mask & FSX_XFLAGS) { 1198 /* 1199 * Can't change realtime flag if any extents are allocated. 1200 */ 1201 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1202 (XFS_IS_REALTIME_INODE(ip)) != 1203 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1204 code = XFS_ERROR(EINVAL); /* EFBIG? */ 1205 goto error_return; 1206 } 1207 1208 /* 1209 * If realtime flag is set then must have realtime data. 1210 */ 1211 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1212 if ((mp->m_sb.sb_rblocks == 0) || 1213 (mp->m_sb.sb_rextsize == 0) || 1214 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { 1215 code = XFS_ERROR(EINVAL); 1216 goto error_return; 1217 } 1218 } 1219 1220 /* 1221 * Can't modify an immutable/append-only file unless 1222 * we have appropriate permission. 1223 */ 1224 if ((ip->i_d.di_flags & 1225 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || 1226 (fa->fsx_xflags & 1227 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && 1228 !capable(CAP_LINUX_IMMUTABLE)) { 1229 code = XFS_ERROR(EPERM); 1230 goto error_return; 1231 } 1232 } 1233 1234 xfs_trans_ijoin(tp, ip, 0); 1235 1236 /* 1237 * Change file ownership. Must be the owner or privileged. 1238 */ 1239 if (mask & FSX_PROJID) { 1240 /* 1241 * CAP_FSETID overrides the following restrictions: 1242 * 1243 * The set-user-ID and set-group-ID bits of a file will be 1244 * cleared upon successful return from chown() 1245 */ 1246 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && 1247 !inode_capable(VFS_I(ip), CAP_FSETID)) 1248 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); 1249 1250 /* 1251 * Change the ownerships and register quota modifications 1252 * in the transaction. 1253 */ 1254 if (xfs_get_projid(ip) != fa->fsx_projid) { 1255 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1256 olddquot = xfs_qm_vop_chown(tp, ip, 1257 &ip->i_pdquot, pdqp); 1258 } 1259 xfs_set_projid(ip, fa->fsx_projid); 1260 1261 /* 1262 * We may have to rev the inode as well as 1263 * the superblock version number since projids didn't 1264 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. 1265 */ 1266 if (ip->i_d.di_version == 1) 1267 xfs_bump_ino_vers2(tp, ip); 1268 } 1269 1270 } 1271 1272 if (mask & FSX_EXTSIZE) 1273 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1274 if (mask & FSX_XFLAGS) { 1275 xfs_set_diflags(ip, fa->fsx_xflags); 1276 xfs_diflags_to_linux(ip); 1277 } 1278 1279 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1280 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1281 1282 XFS_STATS_INC(xs_ig_attrchg); 1283 1284 /* 1285 * If this is a synchronous mount, make sure that the 1286 * transaction goes to disk before returning to the user. 1287 * This is slightly sub-optimal in that truncates require 1288 * two sync transactions instead of one for wsync filesystems. 1289 * One for the truncate and one for the timestamps since we 1290 * don't want to change the timestamps unless we're sure the 1291 * truncate worked. Truncates are less than 1% of the laddis 1292 * mix so this probably isn't worth the trouble to optimize. 1293 */ 1294 if (mp->m_flags & XFS_MOUNT_WSYNC) 1295 xfs_trans_set_sync(tp); 1296 code = xfs_trans_commit(tp, 0); 1297 xfs_iunlock(ip, lock_flags); 1298 1299 /* 1300 * Release any dquot(s) the inode had kept before chown. 1301 */ 1302 xfs_qm_dqrele(olddquot); 1303 xfs_qm_dqrele(udqp); 1304 xfs_qm_dqrele(pdqp); 1305 1306 return code; 1307 1308 error_return: 1309 xfs_qm_dqrele(udqp); 1310 xfs_qm_dqrele(pdqp); 1311 xfs_trans_cancel(tp, 0); 1312 if (lock_flags) 1313 xfs_iunlock(ip, lock_flags); 1314 return code; 1315 } 1316 1317 STATIC int 1318 xfs_ioc_fssetxattr( 1319 xfs_inode_t *ip, 1320 struct file *filp, 1321 void __user *arg) 1322 { 1323 struct fsxattr fa; 1324 unsigned int mask; 1325 int error; 1326 1327 if (copy_from_user(&fa, arg, sizeof(fa))) 1328 return -EFAULT; 1329 1330 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID; 1331 if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) 1332 mask |= FSX_NONBLOCK; 1333 1334 error = mnt_want_write_file(filp); 1335 if (error) 1336 return error; 1337 error = xfs_ioctl_setattr(ip, &fa, mask); 1338 mnt_drop_write_file(filp); 1339 return -error; 1340 } 1341 1342 STATIC int 1343 xfs_ioc_getxflags( 1344 xfs_inode_t *ip, 1345 void __user *arg) 1346 { 1347 unsigned int flags; 1348 1349 flags = xfs_di2lxflags(ip->i_d.di_flags); 1350 if (copy_to_user(arg, &flags, sizeof(flags))) 1351 return -EFAULT; 1352 return 0; 1353 } 1354 1355 STATIC int 1356 xfs_ioc_setxflags( 1357 xfs_inode_t *ip, 1358 struct file *filp, 1359 void __user *arg) 1360 { 1361 struct fsxattr fa; 1362 unsigned int flags; 1363 unsigned int mask; 1364 int error; 1365 1366 if (copy_from_user(&flags, arg, sizeof(flags))) 1367 return -EFAULT; 1368 1369 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1370 FS_NOATIME_FL | FS_NODUMP_FL | \ 1371 FS_SYNC_FL)) 1372 return -EOPNOTSUPP; 1373 1374 mask = FSX_XFLAGS; 1375 if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) 1376 mask |= FSX_NONBLOCK; 1377 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1378 1379 error = mnt_want_write_file(filp); 1380 if (error) 1381 return error; 1382 error = xfs_ioctl_setattr(ip, &fa, mask); 1383 mnt_drop_write_file(filp); 1384 return -error; 1385 } 1386 1387 STATIC int 1388 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) 1389 { 1390 struct getbmap __user *base = *ap; 1391 1392 /* copy only getbmap portion (not getbmapx) */ 1393 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1394 return XFS_ERROR(EFAULT); 1395 1396 *ap += sizeof(struct getbmap); 1397 return 0; 1398 } 1399 1400 STATIC int 1401 xfs_ioc_getbmap( 1402 struct xfs_inode *ip, 1403 int ioflags, 1404 unsigned int cmd, 1405 void __user *arg) 1406 { 1407 struct getbmapx bmx; 1408 int error; 1409 1410 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) 1411 return -XFS_ERROR(EFAULT); 1412 1413 if (bmx.bmv_count < 2) 1414 return -XFS_ERROR(EINVAL); 1415 1416 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1417 if (ioflags & IO_INVIS) 1418 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1419 1420 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, 1421 (struct getbmap *)arg+1); 1422 if (error) 1423 return -error; 1424 1425 /* copy back header - only size of getbmap */ 1426 if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) 1427 return -XFS_ERROR(EFAULT); 1428 return 0; 1429 } 1430 1431 STATIC int 1432 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) 1433 { 1434 struct getbmapx __user *base = *ap; 1435 1436 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1437 return XFS_ERROR(EFAULT); 1438 1439 *ap += sizeof(struct getbmapx); 1440 return 0; 1441 } 1442 1443 STATIC int 1444 xfs_ioc_getbmapx( 1445 struct xfs_inode *ip, 1446 void __user *arg) 1447 { 1448 struct getbmapx bmx; 1449 int error; 1450 1451 if (copy_from_user(&bmx, arg, sizeof(bmx))) 1452 return -XFS_ERROR(EFAULT); 1453 1454 if (bmx.bmv_count < 2) 1455 return -XFS_ERROR(EINVAL); 1456 1457 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1458 return -XFS_ERROR(EINVAL); 1459 1460 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1461 (struct getbmapx *)arg+1); 1462 if (error) 1463 return -error; 1464 1465 /* copy back header */ 1466 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) 1467 return -XFS_ERROR(EFAULT); 1468 1469 return 0; 1470 } 1471 1472 int 1473 xfs_ioc_swapext( 1474 xfs_swapext_t *sxp) 1475 { 1476 xfs_inode_t *ip, *tip; 1477 struct fd f, tmp; 1478 int error = 0; 1479 1480 /* Pull information for the target fd */ 1481 f = fdget((int)sxp->sx_fdtarget); 1482 if (!f.file) { 1483 error = XFS_ERROR(EINVAL); 1484 goto out; 1485 } 1486 1487 if (!(f.file->f_mode & FMODE_WRITE) || 1488 !(f.file->f_mode & FMODE_READ) || 1489 (f.file->f_flags & O_APPEND)) { 1490 error = XFS_ERROR(EBADF); 1491 goto out_put_file; 1492 } 1493 1494 tmp = fdget((int)sxp->sx_fdtmp); 1495 if (!tmp.file) { 1496 error = XFS_ERROR(EINVAL); 1497 goto out_put_file; 1498 } 1499 1500 if (!(tmp.file->f_mode & FMODE_WRITE) || 1501 !(tmp.file->f_mode & FMODE_READ) || 1502 (tmp.file->f_flags & O_APPEND)) { 1503 error = XFS_ERROR(EBADF); 1504 goto out_put_tmp_file; 1505 } 1506 1507 if (IS_SWAPFILE(file_inode(f.file)) || 1508 IS_SWAPFILE(file_inode(tmp.file))) { 1509 error = XFS_ERROR(EINVAL); 1510 goto out_put_tmp_file; 1511 } 1512 1513 ip = XFS_I(file_inode(f.file)); 1514 tip = XFS_I(file_inode(tmp.file)); 1515 1516 if (ip->i_mount != tip->i_mount) { 1517 error = XFS_ERROR(EINVAL); 1518 goto out_put_tmp_file; 1519 } 1520 1521 if (ip->i_ino == tip->i_ino) { 1522 error = XFS_ERROR(EINVAL); 1523 goto out_put_tmp_file; 1524 } 1525 1526 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1527 error = XFS_ERROR(EIO); 1528 goto out_put_tmp_file; 1529 } 1530 1531 error = xfs_swap_extents(ip, tip, sxp); 1532 1533 out_put_tmp_file: 1534 fdput(tmp); 1535 out_put_file: 1536 fdput(f); 1537 out: 1538 return error; 1539 } 1540 1541 /* 1542 * Note: some of the ioctl's return positive numbers as a 1543 * byte count indicating success, such as readlink_by_handle. 1544 * So we don't "sign flip" like most other routines. This means 1545 * true errors need to be returned as a negative value. 1546 */ 1547 long 1548 xfs_file_ioctl( 1549 struct file *filp, 1550 unsigned int cmd, 1551 unsigned long p) 1552 { 1553 struct inode *inode = file_inode(filp); 1554 struct xfs_inode *ip = XFS_I(inode); 1555 struct xfs_mount *mp = ip->i_mount; 1556 void __user *arg = (void __user *)p; 1557 int ioflags = 0; 1558 int error; 1559 1560 if (filp->f_mode & FMODE_NOCMTIME) 1561 ioflags |= IO_INVIS; 1562 1563 trace_xfs_file_ioctl(ip); 1564 1565 switch (cmd) { 1566 case FITRIM: 1567 return xfs_ioc_trim(mp, arg); 1568 case XFS_IOC_ALLOCSP: 1569 case XFS_IOC_FREESP: 1570 case XFS_IOC_RESVSP: 1571 case XFS_IOC_UNRESVSP: 1572 case XFS_IOC_ALLOCSP64: 1573 case XFS_IOC_FREESP64: 1574 case XFS_IOC_RESVSP64: 1575 case XFS_IOC_UNRESVSP64: 1576 case XFS_IOC_ZERO_RANGE: { 1577 xfs_flock64_t bf; 1578 1579 if (copy_from_user(&bf, arg, sizeof(bf))) 1580 return -XFS_ERROR(EFAULT); 1581 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf); 1582 } 1583 case XFS_IOC_DIOINFO: { 1584 struct dioattr da; 1585 xfs_buftarg_t *target = 1586 XFS_IS_REALTIME_INODE(ip) ? 1587 mp->m_rtdev_targp : mp->m_ddev_targp; 1588 1589 da.d_mem = da.d_miniosz = 1 << target->bt_sshift; 1590 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1591 1592 if (copy_to_user(arg, &da, sizeof(da))) 1593 return -XFS_ERROR(EFAULT); 1594 return 0; 1595 } 1596 1597 case XFS_IOC_FSBULKSTAT_SINGLE: 1598 case XFS_IOC_FSBULKSTAT: 1599 case XFS_IOC_FSINUMBERS: 1600 return xfs_ioc_bulkstat(mp, cmd, arg); 1601 1602 case XFS_IOC_FSGEOMETRY_V1: 1603 return xfs_ioc_fsgeometry_v1(mp, arg); 1604 1605 case XFS_IOC_FSGEOMETRY: 1606 return xfs_ioc_fsgeometry(mp, arg); 1607 1608 case XFS_IOC_GETVERSION: 1609 return put_user(inode->i_generation, (int __user *)arg); 1610 1611 case XFS_IOC_FSGETXATTR: 1612 return xfs_ioc_fsgetxattr(ip, 0, arg); 1613 case XFS_IOC_FSGETXATTRA: 1614 return xfs_ioc_fsgetxattr(ip, 1, arg); 1615 case XFS_IOC_FSSETXATTR: 1616 return xfs_ioc_fssetxattr(ip, filp, arg); 1617 case XFS_IOC_GETXFLAGS: 1618 return xfs_ioc_getxflags(ip, arg); 1619 case XFS_IOC_SETXFLAGS: 1620 return xfs_ioc_setxflags(ip, filp, arg); 1621 1622 case XFS_IOC_FSSETDM: { 1623 struct fsdmidata dmi; 1624 1625 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1626 return -XFS_ERROR(EFAULT); 1627 1628 error = mnt_want_write_file(filp); 1629 if (error) 1630 return error; 1631 1632 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1633 dmi.fsd_dmstate); 1634 mnt_drop_write_file(filp); 1635 return -error; 1636 } 1637 1638 case XFS_IOC_GETBMAP: 1639 case XFS_IOC_GETBMAPA: 1640 return xfs_ioc_getbmap(ip, ioflags, cmd, arg); 1641 1642 case XFS_IOC_GETBMAPX: 1643 return xfs_ioc_getbmapx(ip, arg); 1644 1645 case XFS_IOC_FD_TO_HANDLE: 1646 case XFS_IOC_PATH_TO_HANDLE: 1647 case XFS_IOC_PATH_TO_FSHANDLE: { 1648 xfs_fsop_handlereq_t hreq; 1649 1650 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1651 return -XFS_ERROR(EFAULT); 1652 return xfs_find_handle(cmd, &hreq); 1653 } 1654 case XFS_IOC_OPEN_BY_HANDLE: { 1655 xfs_fsop_handlereq_t hreq; 1656 1657 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1658 return -XFS_ERROR(EFAULT); 1659 return xfs_open_by_handle(filp, &hreq); 1660 } 1661 case XFS_IOC_FSSETDM_BY_HANDLE: 1662 return xfs_fssetdm_by_handle(filp, arg); 1663 1664 case XFS_IOC_READLINK_BY_HANDLE: { 1665 xfs_fsop_handlereq_t hreq; 1666 1667 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1668 return -XFS_ERROR(EFAULT); 1669 return xfs_readlink_by_handle(filp, &hreq); 1670 } 1671 case XFS_IOC_ATTRLIST_BY_HANDLE: 1672 return xfs_attrlist_by_handle(filp, arg); 1673 1674 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1675 return xfs_attrmulti_by_handle(filp, arg); 1676 1677 case XFS_IOC_SWAPEXT: { 1678 struct xfs_swapext sxp; 1679 1680 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1681 return -XFS_ERROR(EFAULT); 1682 error = mnt_want_write_file(filp); 1683 if (error) 1684 return error; 1685 error = xfs_ioc_swapext(&sxp); 1686 mnt_drop_write_file(filp); 1687 return -error; 1688 } 1689 1690 case XFS_IOC_FSCOUNTS: { 1691 xfs_fsop_counts_t out; 1692 1693 error = xfs_fs_counts(mp, &out); 1694 if (error) 1695 return -error; 1696 1697 if (copy_to_user(arg, &out, sizeof(out))) 1698 return -XFS_ERROR(EFAULT); 1699 return 0; 1700 } 1701 1702 case XFS_IOC_SET_RESBLKS: { 1703 xfs_fsop_resblks_t inout; 1704 __uint64_t in; 1705 1706 if (!capable(CAP_SYS_ADMIN)) 1707 return -EPERM; 1708 1709 if (mp->m_flags & XFS_MOUNT_RDONLY) 1710 return -XFS_ERROR(EROFS); 1711 1712 if (copy_from_user(&inout, arg, sizeof(inout))) 1713 return -XFS_ERROR(EFAULT); 1714 1715 error = mnt_want_write_file(filp); 1716 if (error) 1717 return error; 1718 1719 /* input parameter is passed in resblks field of structure */ 1720 in = inout.resblks; 1721 error = xfs_reserve_blocks(mp, &in, &inout); 1722 mnt_drop_write_file(filp); 1723 if (error) 1724 return -error; 1725 1726 if (copy_to_user(arg, &inout, sizeof(inout))) 1727 return -XFS_ERROR(EFAULT); 1728 return 0; 1729 } 1730 1731 case XFS_IOC_GET_RESBLKS: { 1732 xfs_fsop_resblks_t out; 1733 1734 if (!capable(CAP_SYS_ADMIN)) 1735 return -EPERM; 1736 1737 error = xfs_reserve_blocks(mp, NULL, &out); 1738 if (error) 1739 return -error; 1740 1741 if (copy_to_user(arg, &out, sizeof(out))) 1742 return -XFS_ERROR(EFAULT); 1743 1744 return 0; 1745 } 1746 1747 case XFS_IOC_FSGROWFSDATA: { 1748 xfs_growfs_data_t in; 1749 1750 if (copy_from_user(&in, arg, sizeof(in))) 1751 return -XFS_ERROR(EFAULT); 1752 1753 error = mnt_want_write_file(filp); 1754 if (error) 1755 return error; 1756 error = xfs_growfs_data(mp, &in); 1757 mnt_drop_write_file(filp); 1758 return -error; 1759 } 1760 1761 case XFS_IOC_FSGROWFSLOG: { 1762 xfs_growfs_log_t in; 1763 1764 if (copy_from_user(&in, arg, sizeof(in))) 1765 return -XFS_ERROR(EFAULT); 1766 1767 error = mnt_want_write_file(filp); 1768 if (error) 1769 return error; 1770 error = xfs_growfs_log(mp, &in); 1771 mnt_drop_write_file(filp); 1772 return -error; 1773 } 1774 1775 case XFS_IOC_FSGROWFSRT: { 1776 xfs_growfs_rt_t in; 1777 1778 if (copy_from_user(&in, arg, sizeof(in))) 1779 return -XFS_ERROR(EFAULT); 1780 1781 error = mnt_want_write_file(filp); 1782 if (error) 1783 return error; 1784 error = xfs_growfs_rt(mp, &in); 1785 mnt_drop_write_file(filp); 1786 return -error; 1787 } 1788 1789 case XFS_IOC_GOINGDOWN: { 1790 __uint32_t in; 1791 1792 if (!capable(CAP_SYS_ADMIN)) 1793 return -EPERM; 1794 1795 if (get_user(in, (__uint32_t __user *)arg)) 1796 return -XFS_ERROR(EFAULT); 1797 1798 error = xfs_fs_goingdown(mp, in); 1799 return -error; 1800 } 1801 1802 case XFS_IOC_ERROR_INJECTION: { 1803 xfs_error_injection_t in; 1804 1805 if (!capable(CAP_SYS_ADMIN)) 1806 return -EPERM; 1807 1808 if (copy_from_user(&in, arg, sizeof(in))) 1809 return -XFS_ERROR(EFAULT); 1810 1811 error = xfs_errortag_add(in.errtag, mp); 1812 return -error; 1813 } 1814 1815 case XFS_IOC_ERROR_CLEARALL: 1816 if (!capable(CAP_SYS_ADMIN)) 1817 return -EPERM; 1818 1819 error = xfs_errortag_clearall(mp, 1); 1820 return -error; 1821 1822 case XFS_IOC_FREE_EOFBLOCKS: { 1823 struct xfs_fs_eofblocks eofb; 1824 struct xfs_eofblocks keofb; 1825 1826 if (!capable(CAP_SYS_ADMIN)) 1827 return -EPERM; 1828 1829 if (mp->m_flags & XFS_MOUNT_RDONLY) 1830 return -XFS_ERROR(EROFS); 1831 1832 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1833 return -XFS_ERROR(EFAULT); 1834 1835 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 1836 if (error) 1837 return -error; 1838 1839 return -xfs_icache_free_eofblocks(mp, &keofb); 1840 } 1841 1842 default: 1843 return -ENOTTY; 1844 } 1845 } 1846