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