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