1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #include "xfs.h" 19 #include "xfs_fs.h" 20 #include "xfs_shared.h" 21 #include "xfs_format.h" 22 #include "xfs_log_format.h" 23 #include "xfs_trans_resv.h" 24 #include "xfs_mount.h" 25 #include "xfs_inode.h" 26 #include "xfs_ioctl.h" 27 #include "xfs_alloc.h" 28 #include "xfs_rtalloc.h" 29 #include "xfs_itable.h" 30 #include "xfs_error.h" 31 #include "xfs_attr.h" 32 #include "xfs_bmap.h" 33 #include "xfs_bmap_util.h" 34 #include "xfs_fsops.h" 35 #include "xfs_discard.h" 36 #include "xfs_quota.h" 37 #include "xfs_export.h" 38 #include "xfs_trace.h" 39 #include "xfs_icache.h" 40 #include "xfs_symlink.h" 41 #include "xfs_trans.h" 42 43 #include <linux/capability.h> 44 #include <linux/dcache.h> 45 #include <linux/mount.h> 46 #include <linux/namei.h> 47 #include <linux/pagemap.h> 48 #include <linux/slab.h> 49 #include <linux/exportfs.h> 50 51 /* 52 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 53 * a file or fs handle. 54 * 55 * XFS_IOC_PATH_TO_FSHANDLE 56 * returns fs handle for a mount point or path within that mount point 57 * XFS_IOC_FD_TO_HANDLE 58 * returns full handle for a FD opened in user space 59 * XFS_IOC_PATH_TO_HANDLE 60 * returns full handle for a path 61 */ 62 int 63 xfs_find_handle( 64 unsigned int cmd, 65 xfs_fsop_handlereq_t *hreq) 66 { 67 int hsize; 68 xfs_handle_t handle; 69 struct inode *inode; 70 struct fd f = {NULL}; 71 struct path path; 72 int error; 73 struct xfs_inode *ip; 74 75 if (cmd == XFS_IOC_FD_TO_HANDLE) { 76 f = fdget(hreq->fd); 77 if (!f.file) 78 return -EBADF; 79 inode = file_inode(f.file); 80 } else { 81 error = user_lpath((const char __user *)hreq->path, &path); 82 if (error) 83 return error; 84 inode = path.dentry->d_inode; 85 } 86 ip = XFS_I(inode); 87 88 /* 89 * We can only generate handles for inodes residing on a XFS filesystem, 90 * and only for regular files, directories or symbolic links. 91 */ 92 error = -EINVAL; 93 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 94 goto out_put; 95 96 error = -EBADF; 97 if (!S_ISREG(inode->i_mode) && 98 !S_ISDIR(inode->i_mode) && 99 !S_ISLNK(inode->i_mode)) 100 goto out_put; 101 102 103 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 104 105 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 106 /* 107 * This handle only contains an fsid, zero the rest. 108 */ 109 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 110 hsize = sizeof(xfs_fsid_t); 111 } else { 112 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 113 sizeof(handle.ha_fid.fid_len); 114 handle.ha_fid.fid_pad = 0; 115 handle.ha_fid.fid_gen = ip->i_d.di_gen; 116 handle.ha_fid.fid_ino = ip->i_ino; 117 118 hsize = XFS_HSIZE(handle); 119 } 120 121 error = -EFAULT; 122 if (copy_to_user(hreq->ohandle, &handle, hsize) || 123 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 124 goto out_put; 125 126 error = 0; 127 128 out_put: 129 if (cmd == XFS_IOC_FD_TO_HANDLE) 130 fdput(f); 131 else 132 path_put(&path); 133 return error; 134 } 135 136 /* 137 * No need to do permission checks on the various pathname components 138 * as the handle operations are privileged. 139 */ 140 STATIC int 141 xfs_handle_acceptable( 142 void *context, 143 struct dentry *dentry) 144 { 145 return 1; 146 } 147 148 /* 149 * Convert userspace handle data into a dentry. 150 */ 151 struct dentry * 152 xfs_handle_to_dentry( 153 struct file *parfilp, 154 void __user *uhandle, 155 u32 hlen) 156 { 157 xfs_handle_t handle; 158 struct xfs_fid64 fid; 159 160 /* 161 * Only allow handle opens under a directory. 162 */ 163 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 164 return ERR_PTR(-ENOTDIR); 165 166 if (hlen != sizeof(xfs_handle_t)) 167 return ERR_PTR(-EINVAL); 168 if (copy_from_user(&handle, uhandle, hlen)) 169 return ERR_PTR(-EFAULT); 170 if (handle.ha_fid.fid_len != 171 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 172 return ERR_PTR(-EINVAL); 173 174 memset(&fid, 0, sizeof(struct fid)); 175 fid.ino = handle.ha_fid.fid_ino; 176 fid.gen = handle.ha_fid.fid_gen; 177 178 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 179 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 180 xfs_handle_acceptable, NULL); 181 } 182 183 STATIC struct dentry * 184 xfs_handlereq_to_dentry( 185 struct file *parfilp, 186 xfs_fsop_handlereq_t *hreq) 187 { 188 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 189 } 190 191 int 192 xfs_open_by_handle( 193 struct file *parfilp, 194 xfs_fsop_handlereq_t *hreq) 195 { 196 const struct cred *cred = current_cred(); 197 int error; 198 int fd; 199 int permflag; 200 struct file *filp; 201 struct inode *inode; 202 struct dentry *dentry; 203 fmode_t fmode; 204 struct path path; 205 206 if (!capable(CAP_SYS_ADMIN)) 207 return -EPERM; 208 209 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 210 if (IS_ERR(dentry)) 211 return PTR_ERR(dentry); 212 inode = dentry->d_inode; 213 214 /* Restrict xfs_open_by_handle to directories & regular files. */ 215 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 216 error = -EPERM; 217 goto out_dput; 218 } 219 220 #if BITS_PER_LONG != 32 221 hreq->oflags |= O_LARGEFILE; 222 #endif 223 224 permflag = hreq->oflags; 225 fmode = OPEN_FMODE(permflag); 226 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 227 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 228 error = -EPERM; 229 goto out_dput; 230 } 231 232 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 233 error = -EACCES; 234 goto out_dput; 235 } 236 237 /* Can't write directories. */ 238 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 239 error = -EISDIR; 240 goto out_dput; 241 } 242 243 fd = get_unused_fd_flags(0); 244 if (fd < 0) { 245 error = fd; 246 goto out_dput; 247 } 248 249 path.mnt = parfilp->f_path.mnt; 250 path.dentry = dentry; 251 filp = dentry_open(&path, hreq->oflags, cred); 252 dput(dentry); 253 if (IS_ERR(filp)) { 254 put_unused_fd(fd); 255 return PTR_ERR(filp); 256 } 257 258 if (S_ISREG(inode->i_mode)) { 259 filp->f_flags |= O_NOATIME; 260 filp->f_mode |= FMODE_NOCMTIME; 261 } 262 263 fd_install(fd, filp); 264 return fd; 265 266 out_dput: 267 dput(dentry); 268 return error; 269 } 270 271 int 272 xfs_readlink_by_handle( 273 struct file *parfilp, 274 xfs_fsop_handlereq_t *hreq) 275 { 276 struct dentry *dentry; 277 __u32 olen; 278 void *link; 279 int error; 280 281 if (!capable(CAP_SYS_ADMIN)) 282 return -EPERM; 283 284 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 285 if (IS_ERR(dentry)) 286 return PTR_ERR(dentry); 287 288 /* Restrict this handle operation to symlinks only. */ 289 if (!S_ISLNK(dentry->d_inode->i_mode)) { 290 error = -EINVAL; 291 goto out_dput; 292 } 293 294 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 295 error = -EFAULT; 296 goto out_dput; 297 } 298 299 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); 300 if (!link) { 301 error = -ENOMEM; 302 goto out_dput; 303 } 304 305 error = xfs_readlink(XFS_I(dentry->d_inode), link); 306 if (error) 307 goto out_kfree; 308 error = readlink_copy(hreq->ohandle, olen, link); 309 if (error) 310 goto out_kfree; 311 312 out_kfree: 313 kfree(link); 314 out_dput: 315 dput(dentry); 316 return error; 317 } 318 319 int 320 xfs_set_dmattrs( 321 xfs_inode_t *ip, 322 u_int evmask, 323 u_int16_t state) 324 { 325 xfs_mount_t *mp = ip->i_mount; 326 xfs_trans_t *tp; 327 int error; 328 329 if (!capable(CAP_SYS_ADMIN)) 330 return -EPERM; 331 332 if (XFS_FORCED_SHUTDOWN(mp)) 333 return -EIO; 334 335 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); 336 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); 337 if (error) { 338 xfs_trans_cancel(tp, 0); 339 return error; 340 } 341 xfs_ilock(ip, XFS_ILOCK_EXCL); 342 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 343 344 ip->i_d.di_dmevmask = evmask; 345 ip->i_d.di_dmstate = state; 346 347 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 348 error = xfs_trans_commit(tp, 0); 349 350 return error; 351 } 352 353 STATIC int 354 xfs_fssetdm_by_handle( 355 struct file *parfilp, 356 void __user *arg) 357 { 358 int error; 359 struct fsdmidata fsd; 360 xfs_fsop_setdm_handlereq_t dmhreq; 361 struct dentry *dentry; 362 363 if (!capable(CAP_MKNOD)) 364 return -EPERM; 365 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) 366 return -EFAULT; 367 368 error = mnt_want_write_file(parfilp); 369 if (error) 370 return error; 371 372 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); 373 if (IS_ERR(dentry)) { 374 mnt_drop_write_file(parfilp); 375 return PTR_ERR(dentry); 376 } 377 378 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) { 379 error = -EPERM; 380 goto out; 381 } 382 383 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { 384 error = -EFAULT; 385 goto out; 386 } 387 388 error = xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask, 389 fsd.fsd_dmstate); 390 391 out: 392 mnt_drop_write_file(parfilp); 393 dput(dentry); 394 return error; 395 } 396 397 STATIC int 398 xfs_attrlist_by_handle( 399 struct file *parfilp, 400 void __user *arg) 401 { 402 int error = -ENOMEM; 403 attrlist_cursor_kern_t *cursor; 404 xfs_fsop_attrlist_handlereq_t al_hreq; 405 struct dentry *dentry; 406 char *kbuf; 407 408 if (!capable(CAP_SYS_ADMIN)) 409 return -EPERM; 410 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 411 return -EFAULT; 412 if (al_hreq.buflen < sizeof(struct attrlist) || 413 al_hreq.buflen > XATTR_LIST_MAX) 414 return -EINVAL; 415 416 /* 417 * Reject flags, only allow namespaces. 418 */ 419 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 420 return -EINVAL; 421 422 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 423 if (IS_ERR(dentry)) 424 return PTR_ERR(dentry); 425 426 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); 427 if (!kbuf) 428 goto out_dput; 429 430 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 431 error = xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen, 432 al_hreq.flags, cursor); 433 if (error) 434 goto out_kfree; 435 436 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 437 error = -EFAULT; 438 439 out_kfree: 440 kmem_free(kbuf); 441 out_dput: 442 dput(dentry); 443 return error; 444 } 445 446 int 447 xfs_attrmulti_attr_get( 448 struct inode *inode, 449 unsigned char *name, 450 unsigned char __user *ubuf, 451 __uint32_t *len, 452 __uint32_t flags) 453 { 454 unsigned char *kbuf; 455 int error = -EFAULT; 456 457 if (*len > XATTR_SIZE_MAX) 458 return -EINVAL; 459 kbuf = kmem_zalloc_large(*len, KM_SLEEP); 460 if (!kbuf) 461 return -ENOMEM; 462 463 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); 464 if (error) 465 goto out_kfree; 466 467 if (copy_to_user(ubuf, kbuf, *len)) 468 error = -EFAULT; 469 470 out_kfree: 471 kmem_free(kbuf); 472 return error; 473 } 474 475 int 476 xfs_attrmulti_attr_set( 477 struct inode *inode, 478 unsigned char *name, 479 const unsigned char __user *ubuf, 480 __uint32_t len, 481 __uint32_t flags) 482 { 483 unsigned char *kbuf; 484 485 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 486 return -EPERM; 487 if (len > XATTR_SIZE_MAX) 488 return -EINVAL; 489 490 kbuf = memdup_user(ubuf, len); 491 if (IS_ERR(kbuf)) 492 return PTR_ERR(kbuf); 493 494 return xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 495 } 496 497 int 498 xfs_attrmulti_attr_remove( 499 struct inode *inode, 500 unsigned char *name, 501 __uint32_t flags) 502 { 503 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 504 return -EPERM; 505 return xfs_attr_remove(XFS_I(inode), name, flags); 506 } 507 508 STATIC int 509 xfs_attrmulti_by_handle( 510 struct file *parfilp, 511 void __user *arg) 512 { 513 int error; 514 xfs_attr_multiop_t *ops; 515 xfs_fsop_attrmulti_handlereq_t am_hreq; 516 struct dentry *dentry; 517 unsigned int i, size; 518 unsigned char *attr_name; 519 520 if (!capable(CAP_SYS_ADMIN)) 521 return -EPERM; 522 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 523 return -EFAULT; 524 525 /* overflow check */ 526 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 527 return -E2BIG; 528 529 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 530 if (IS_ERR(dentry)) 531 return PTR_ERR(dentry); 532 533 error = -E2BIG; 534 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 535 if (!size || size > 16 * PAGE_SIZE) 536 goto out_dput; 537 538 ops = memdup_user(am_hreq.ops, size); 539 if (IS_ERR(ops)) { 540 error = PTR_ERR(ops); 541 goto out_dput; 542 } 543 544 error = -ENOMEM; 545 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 546 if (!attr_name) 547 goto out_kfree_ops; 548 549 error = 0; 550 for (i = 0; i < am_hreq.opcount; i++) { 551 ops[i].am_error = strncpy_from_user((char *)attr_name, 552 ops[i].am_attrname, MAXNAMELEN); 553 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 554 error = -ERANGE; 555 if (ops[i].am_error < 0) 556 break; 557 558 switch (ops[i].am_opcode) { 559 case ATTR_OP_GET: 560 ops[i].am_error = xfs_attrmulti_attr_get( 561 dentry->d_inode, attr_name, 562 ops[i].am_attrvalue, &ops[i].am_length, 563 ops[i].am_flags); 564 break; 565 case ATTR_OP_SET: 566 ops[i].am_error = mnt_want_write_file(parfilp); 567 if (ops[i].am_error) 568 break; 569 ops[i].am_error = xfs_attrmulti_attr_set( 570 dentry->d_inode, attr_name, 571 ops[i].am_attrvalue, ops[i].am_length, 572 ops[i].am_flags); 573 mnt_drop_write_file(parfilp); 574 break; 575 case ATTR_OP_REMOVE: 576 ops[i].am_error = mnt_want_write_file(parfilp); 577 if (ops[i].am_error) 578 break; 579 ops[i].am_error = xfs_attrmulti_attr_remove( 580 dentry->d_inode, attr_name, 581 ops[i].am_flags); 582 mnt_drop_write_file(parfilp); 583 break; 584 default: 585 ops[i].am_error = -EINVAL; 586 } 587 } 588 589 if (copy_to_user(am_hreq.ops, ops, size)) 590 error = -EFAULT; 591 592 kfree(attr_name); 593 out_kfree_ops: 594 kfree(ops); 595 out_dput: 596 dput(dentry); 597 return error; 598 } 599 600 int 601 xfs_ioc_space( 602 struct xfs_inode *ip, 603 struct inode *inode, 604 struct file *filp, 605 int ioflags, 606 unsigned int cmd, 607 xfs_flock64_t *bf) 608 { 609 struct xfs_mount *mp = ip->i_mount; 610 struct xfs_trans *tp; 611 struct iattr iattr; 612 bool setprealloc = false; 613 bool clrprealloc = false; 614 int error; 615 616 /* 617 * Only allow the sys admin to reserve space unless 618 * unwritten extents are enabled. 619 */ 620 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && 621 !capable(CAP_SYS_ADMIN)) 622 return -EPERM; 623 624 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 625 return -EPERM; 626 627 if (!(filp->f_mode & FMODE_WRITE)) 628 return -EBADF; 629 630 if (!S_ISREG(inode->i_mode)) 631 return -EINVAL; 632 633 error = mnt_want_write_file(filp); 634 if (error) 635 return error; 636 637 xfs_ilock(ip, XFS_IOLOCK_EXCL); 638 639 switch (bf->l_whence) { 640 case 0: /*SEEK_SET*/ 641 break; 642 case 1: /*SEEK_CUR*/ 643 bf->l_start += filp->f_pos; 644 break; 645 case 2: /*SEEK_END*/ 646 bf->l_start += XFS_ISIZE(ip); 647 break; 648 default: 649 error = -EINVAL; 650 goto out_unlock; 651 } 652 653 /* 654 * length of <= 0 for resv/unresv/zero is invalid. length for 655 * alloc/free is ignored completely and we have no idea what userspace 656 * might have set it to, so set it to zero to allow range 657 * checks to pass. 658 */ 659 switch (cmd) { 660 case XFS_IOC_ZERO_RANGE: 661 case XFS_IOC_RESVSP: 662 case XFS_IOC_RESVSP64: 663 case XFS_IOC_UNRESVSP: 664 case XFS_IOC_UNRESVSP64: 665 if (bf->l_len <= 0) { 666 error = -EINVAL; 667 goto out_unlock; 668 } 669 break; 670 default: 671 bf->l_len = 0; 672 break; 673 } 674 675 if (bf->l_start < 0 || 676 bf->l_start > mp->m_super->s_maxbytes || 677 bf->l_start + bf->l_len < 0 || 678 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) { 679 error = -EINVAL; 680 goto out_unlock; 681 } 682 683 switch (cmd) { 684 case XFS_IOC_ZERO_RANGE: 685 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); 686 if (!error) 687 setprealloc = true; 688 break; 689 case XFS_IOC_RESVSP: 690 case XFS_IOC_RESVSP64: 691 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, 692 XFS_BMAPI_PREALLOC); 693 if (!error) 694 setprealloc = true; 695 break; 696 case XFS_IOC_UNRESVSP: 697 case XFS_IOC_UNRESVSP64: 698 error = xfs_free_file_space(ip, bf->l_start, bf->l_len); 699 break; 700 case XFS_IOC_ALLOCSP: 701 case XFS_IOC_ALLOCSP64: 702 case XFS_IOC_FREESP: 703 case XFS_IOC_FREESP64: 704 if (bf->l_start > XFS_ISIZE(ip)) { 705 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 706 bf->l_start - XFS_ISIZE(ip), 0); 707 if (error) 708 goto out_unlock; 709 } 710 711 iattr.ia_valid = ATTR_SIZE; 712 iattr.ia_size = bf->l_start; 713 714 error = xfs_setattr_size(ip, &iattr); 715 if (!error) 716 clrprealloc = true; 717 break; 718 default: 719 ASSERT(0); 720 error = -EINVAL; 721 } 722 723 if (error) 724 goto out_unlock; 725 726 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); 727 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0); 728 if (error) { 729 xfs_trans_cancel(tp, 0); 730 goto out_unlock; 731 } 732 733 xfs_ilock(ip, XFS_ILOCK_EXCL); 734 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 735 736 if (!(ioflags & XFS_IO_INVIS)) { 737 ip->i_d.di_mode &= ~S_ISUID; 738 if (ip->i_d.di_mode & S_IXGRP) 739 ip->i_d.di_mode &= ~S_ISGID; 740 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); 741 } 742 743 if (setprealloc) 744 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; 745 else if (clrprealloc) 746 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; 747 748 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 749 if (filp->f_flags & O_DSYNC) 750 xfs_trans_set_sync(tp); 751 error = xfs_trans_commit(tp, 0); 752 753 out_unlock: 754 xfs_iunlock(ip, XFS_IOLOCK_EXCL); 755 mnt_drop_write_file(filp); 756 return error; 757 } 758 759 STATIC int 760 xfs_ioc_bulkstat( 761 xfs_mount_t *mp, 762 unsigned int cmd, 763 void __user *arg) 764 { 765 xfs_fsop_bulkreq_t bulkreq; 766 int count; /* # of records returned */ 767 xfs_ino_t inlast; /* last inode number */ 768 int done; 769 int error; 770 771 /* done = 1 if there are more stats to get and if bulkstat */ 772 /* should be called again (unused here, but used in dmapi) */ 773 774 if (!capable(CAP_SYS_ADMIN)) 775 return -EPERM; 776 777 if (XFS_FORCED_SHUTDOWN(mp)) 778 return -EIO; 779 780 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) 781 return -EFAULT; 782 783 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) 784 return -EFAULT; 785 786 if ((count = bulkreq.icount) <= 0) 787 return -EINVAL; 788 789 if (bulkreq.ubuffer == NULL) 790 return -EINVAL; 791 792 if (cmd == XFS_IOC_FSINUMBERS) 793 error = xfs_inumbers(mp, &inlast, &count, 794 bulkreq.ubuffer, xfs_inumbers_fmt); 795 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) 796 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer, 797 sizeof(xfs_bstat_t), NULL, &done); 798 else /* XFS_IOC_FSBULKSTAT */ 799 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, 800 sizeof(xfs_bstat_t), bulkreq.ubuffer, 801 &done); 802 803 if (error) 804 return error; 805 806 if (bulkreq.ocount != NULL) { 807 if (copy_to_user(bulkreq.lastip, &inlast, 808 sizeof(xfs_ino_t))) 809 return -EFAULT; 810 811 if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) 812 return -EFAULT; 813 } 814 815 return 0; 816 } 817 818 STATIC int 819 xfs_ioc_fsgeometry_v1( 820 xfs_mount_t *mp, 821 void __user *arg) 822 { 823 xfs_fsop_geom_t fsgeo; 824 int error; 825 826 error = xfs_fs_geometry(mp, &fsgeo, 3); 827 if (error) 828 return error; 829 830 /* 831 * Caller should have passed an argument of type 832 * xfs_fsop_geom_v1_t. This is a proper subset of the 833 * xfs_fsop_geom_t that xfs_fs_geometry() fills in. 834 */ 835 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) 836 return -EFAULT; 837 return 0; 838 } 839 840 STATIC int 841 xfs_ioc_fsgeometry( 842 xfs_mount_t *mp, 843 void __user *arg) 844 { 845 xfs_fsop_geom_t fsgeo; 846 int error; 847 848 error = xfs_fs_geometry(mp, &fsgeo, 4); 849 if (error) 850 return error; 851 852 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) 853 return -EFAULT; 854 return 0; 855 } 856 857 /* 858 * Linux extended inode flags interface. 859 */ 860 861 STATIC unsigned int 862 xfs_merge_ioc_xflags( 863 unsigned int flags, 864 unsigned int start) 865 { 866 unsigned int xflags = start; 867 868 if (flags & FS_IMMUTABLE_FL) 869 xflags |= XFS_XFLAG_IMMUTABLE; 870 else 871 xflags &= ~XFS_XFLAG_IMMUTABLE; 872 if (flags & FS_APPEND_FL) 873 xflags |= XFS_XFLAG_APPEND; 874 else 875 xflags &= ~XFS_XFLAG_APPEND; 876 if (flags & FS_SYNC_FL) 877 xflags |= XFS_XFLAG_SYNC; 878 else 879 xflags &= ~XFS_XFLAG_SYNC; 880 if (flags & FS_NOATIME_FL) 881 xflags |= XFS_XFLAG_NOATIME; 882 else 883 xflags &= ~XFS_XFLAG_NOATIME; 884 if (flags & FS_NODUMP_FL) 885 xflags |= XFS_XFLAG_NODUMP; 886 else 887 xflags &= ~XFS_XFLAG_NODUMP; 888 889 return xflags; 890 } 891 892 STATIC unsigned int 893 xfs_di2lxflags( 894 __uint16_t di_flags) 895 { 896 unsigned int flags = 0; 897 898 if (di_flags & XFS_DIFLAG_IMMUTABLE) 899 flags |= FS_IMMUTABLE_FL; 900 if (di_flags & XFS_DIFLAG_APPEND) 901 flags |= FS_APPEND_FL; 902 if (di_flags & XFS_DIFLAG_SYNC) 903 flags |= FS_SYNC_FL; 904 if (di_flags & XFS_DIFLAG_NOATIME) 905 flags |= FS_NOATIME_FL; 906 if (di_flags & XFS_DIFLAG_NODUMP) 907 flags |= FS_NODUMP_FL; 908 return flags; 909 } 910 911 STATIC int 912 xfs_ioc_fsgetxattr( 913 xfs_inode_t *ip, 914 int attr, 915 void __user *arg) 916 { 917 struct fsxattr fa; 918 919 memset(&fa, 0, sizeof(struct fsxattr)); 920 921 xfs_ilock(ip, XFS_ILOCK_SHARED); 922 fa.fsx_xflags = xfs_ip2xflags(ip); 923 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 924 fa.fsx_projid = xfs_get_projid(ip); 925 926 if (attr) { 927 if (ip->i_afp) { 928 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 929 fa.fsx_nextents = ip->i_afp->if_bytes / 930 sizeof(xfs_bmbt_rec_t); 931 else 932 fa.fsx_nextents = ip->i_d.di_anextents; 933 } else 934 fa.fsx_nextents = 0; 935 } else { 936 if (ip->i_df.if_flags & XFS_IFEXTENTS) 937 fa.fsx_nextents = ip->i_df.if_bytes / 938 sizeof(xfs_bmbt_rec_t); 939 else 940 fa.fsx_nextents = ip->i_d.di_nextents; 941 } 942 xfs_iunlock(ip, XFS_ILOCK_SHARED); 943 944 if (copy_to_user(arg, &fa, sizeof(fa))) 945 return -EFAULT; 946 return 0; 947 } 948 949 STATIC void 950 xfs_set_diflags( 951 struct xfs_inode *ip, 952 unsigned int xflags) 953 { 954 unsigned int di_flags; 955 956 /* can't set PREALLOC this way, just preserve it */ 957 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 958 if (xflags & XFS_XFLAG_IMMUTABLE) 959 di_flags |= XFS_DIFLAG_IMMUTABLE; 960 if (xflags & XFS_XFLAG_APPEND) 961 di_flags |= XFS_DIFLAG_APPEND; 962 if (xflags & XFS_XFLAG_SYNC) 963 di_flags |= XFS_DIFLAG_SYNC; 964 if (xflags & XFS_XFLAG_NOATIME) 965 di_flags |= XFS_DIFLAG_NOATIME; 966 if (xflags & XFS_XFLAG_NODUMP) 967 di_flags |= XFS_DIFLAG_NODUMP; 968 if (xflags & XFS_XFLAG_NODEFRAG) 969 di_flags |= XFS_DIFLAG_NODEFRAG; 970 if (xflags & XFS_XFLAG_FILESTREAM) 971 di_flags |= XFS_DIFLAG_FILESTREAM; 972 if (S_ISDIR(ip->i_d.di_mode)) { 973 if (xflags & XFS_XFLAG_RTINHERIT) 974 di_flags |= XFS_DIFLAG_RTINHERIT; 975 if (xflags & XFS_XFLAG_NOSYMLINKS) 976 di_flags |= XFS_DIFLAG_NOSYMLINKS; 977 if (xflags & XFS_XFLAG_EXTSZINHERIT) 978 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 979 if (xflags & XFS_XFLAG_PROJINHERIT) 980 di_flags |= XFS_DIFLAG_PROJINHERIT; 981 } else if (S_ISREG(ip->i_d.di_mode)) { 982 if (xflags & XFS_XFLAG_REALTIME) 983 di_flags |= XFS_DIFLAG_REALTIME; 984 if (xflags & XFS_XFLAG_EXTSIZE) 985 di_flags |= XFS_DIFLAG_EXTSIZE; 986 } 987 988 ip->i_d.di_flags = di_flags; 989 } 990 991 STATIC void 992 xfs_diflags_to_linux( 993 struct xfs_inode *ip) 994 { 995 struct inode *inode = VFS_I(ip); 996 unsigned int xflags = xfs_ip2xflags(ip); 997 998 if (xflags & XFS_XFLAG_IMMUTABLE) 999 inode->i_flags |= S_IMMUTABLE; 1000 else 1001 inode->i_flags &= ~S_IMMUTABLE; 1002 if (xflags & XFS_XFLAG_APPEND) 1003 inode->i_flags |= S_APPEND; 1004 else 1005 inode->i_flags &= ~S_APPEND; 1006 if (xflags & XFS_XFLAG_SYNC) 1007 inode->i_flags |= S_SYNC; 1008 else 1009 inode->i_flags &= ~S_SYNC; 1010 if (xflags & XFS_XFLAG_NOATIME) 1011 inode->i_flags |= S_NOATIME; 1012 else 1013 inode->i_flags &= ~S_NOATIME; 1014 } 1015 1016 #define FSX_PROJID 1 1017 #define FSX_EXTSIZE 2 1018 #define FSX_XFLAGS 4 1019 #define FSX_NONBLOCK 8 1020 1021 STATIC int 1022 xfs_ioctl_setattr( 1023 xfs_inode_t *ip, 1024 struct fsxattr *fa, 1025 int mask) 1026 { 1027 struct xfs_mount *mp = ip->i_mount; 1028 struct xfs_trans *tp; 1029 unsigned int lock_flags = 0; 1030 struct xfs_dquot *udqp = NULL; 1031 struct xfs_dquot *pdqp = NULL; 1032 struct xfs_dquot *olddquot = NULL; 1033 int code; 1034 1035 trace_xfs_ioctl_setattr(ip); 1036 1037 if (mp->m_flags & XFS_MOUNT_RDONLY) 1038 return -EROFS; 1039 if (XFS_FORCED_SHUTDOWN(mp)) 1040 return -EIO; 1041 1042 /* 1043 * Disallow 32bit project ids when projid32bit feature is not enabled. 1044 */ 1045 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) && 1046 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1047 return -EINVAL; 1048 1049 /* 1050 * If disk quotas is on, we make sure that the dquots do exist on disk, 1051 * before we start any other transactions. Trying to do this later 1052 * is messy. We don't care to take a readlock to look at the ids 1053 * in inode here, because we can't hold it across the trans_reserve. 1054 * If the IDs do change before we take the ilock, we're covered 1055 * because the i_*dquot fields will get updated anyway. 1056 */ 1057 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) { 1058 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1059 ip->i_d.di_gid, fa->fsx_projid, 1060 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1061 if (code) 1062 return code; 1063 } 1064 1065 /* 1066 * For the other attributes, we acquire the inode lock and 1067 * first do an error checking pass. 1068 */ 1069 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); 1070 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); 1071 if (code) 1072 goto error_return; 1073 1074 lock_flags = XFS_ILOCK_EXCL; 1075 xfs_ilock(ip, lock_flags); 1076 1077 /* 1078 * CAP_FOWNER overrides the following restrictions: 1079 * 1080 * The user ID of the calling process must be equal 1081 * to the file owner ID, except in cases where the 1082 * CAP_FSETID capability is applicable. 1083 */ 1084 if (!inode_owner_or_capable(VFS_I(ip))) { 1085 code = -EPERM; 1086 goto error_return; 1087 } 1088 1089 /* 1090 * Do a quota reservation only if projid is actually going to change. 1091 * Only allow changing of projid from init_user_ns since it is a 1092 * non user namespace aware identifier. 1093 */ 1094 if (mask & FSX_PROJID) { 1095 if (current_user_ns() != &init_user_ns) { 1096 code = -EINVAL; 1097 goto error_return; 1098 } 1099 1100 if (XFS_IS_QUOTA_RUNNING(mp) && 1101 XFS_IS_PQUOTA_ON(mp) && 1102 xfs_get_projid(ip) != fa->fsx_projid) { 1103 ASSERT(tp); 1104 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, 1105 pdqp, capable(CAP_FOWNER) ? 1106 XFS_QMOPT_FORCE_RES : 0); 1107 if (code) /* out of quota */ 1108 goto error_return; 1109 } 1110 } 1111 1112 if (mask & FSX_EXTSIZE) { 1113 /* 1114 * Can't change extent size if any extents are allocated. 1115 */ 1116 if (ip->i_d.di_nextents && 1117 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != 1118 fa->fsx_extsize)) { 1119 code = -EINVAL; /* EFBIG? */ 1120 goto error_return; 1121 } 1122 1123 /* 1124 * Extent size must be a multiple of the appropriate block 1125 * size, if set at all. It must also be smaller than the 1126 * maximum extent size supported by the filesystem. 1127 * 1128 * Also, for non-realtime files, limit the extent size hint to 1129 * half the size of the AGs in the filesystem so alignment 1130 * doesn't result in extents larger than an AG. 1131 */ 1132 if (fa->fsx_extsize != 0) { 1133 xfs_extlen_t size; 1134 xfs_fsblock_t extsize_fsb; 1135 1136 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1137 if (extsize_fsb > MAXEXTLEN) { 1138 code = -EINVAL; 1139 goto error_return; 1140 } 1141 1142 if (XFS_IS_REALTIME_INODE(ip) || 1143 ((mask & FSX_XFLAGS) && 1144 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) { 1145 size = mp->m_sb.sb_rextsize << 1146 mp->m_sb.sb_blocklog; 1147 } else { 1148 size = mp->m_sb.sb_blocksize; 1149 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) { 1150 code = -EINVAL; 1151 goto error_return; 1152 } 1153 } 1154 1155 if (fa->fsx_extsize % size) { 1156 code = -EINVAL; 1157 goto error_return; 1158 } 1159 } 1160 } 1161 1162 1163 if (mask & FSX_XFLAGS) { 1164 /* 1165 * Can't change realtime flag if any extents are allocated. 1166 */ 1167 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1168 (XFS_IS_REALTIME_INODE(ip)) != 1169 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1170 code = -EINVAL; /* EFBIG? */ 1171 goto error_return; 1172 } 1173 1174 /* 1175 * If realtime flag is set then must have realtime data. 1176 */ 1177 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1178 if ((mp->m_sb.sb_rblocks == 0) || 1179 (mp->m_sb.sb_rextsize == 0) || 1180 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { 1181 code = -EINVAL; 1182 goto error_return; 1183 } 1184 } 1185 1186 /* 1187 * Can't modify an immutable/append-only file unless 1188 * we have appropriate permission. 1189 */ 1190 if ((ip->i_d.di_flags & 1191 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || 1192 (fa->fsx_xflags & 1193 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && 1194 !capable(CAP_LINUX_IMMUTABLE)) { 1195 code = -EPERM; 1196 goto error_return; 1197 } 1198 } 1199 1200 xfs_trans_ijoin(tp, ip, 0); 1201 1202 /* 1203 * Change file ownership. Must be the owner or privileged. 1204 */ 1205 if (mask & FSX_PROJID) { 1206 /* 1207 * CAP_FSETID overrides the following restrictions: 1208 * 1209 * The set-user-ID and set-group-ID bits of a file will be 1210 * cleared upon successful return from chown() 1211 */ 1212 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && 1213 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1214 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); 1215 1216 /* 1217 * Change the ownerships and register quota modifications 1218 * in the transaction. 1219 */ 1220 if (xfs_get_projid(ip) != fa->fsx_projid) { 1221 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1222 olddquot = xfs_qm_vop_chown(tp, ip, 1223 &ip->i_pdquot, pdqp); 1224 } 1225 ASSERT(ip->i_d.di_version > 1); 1226 xfs_set_projid(ip, fa->fsx_projid); 1227 } 1228 1229 } 1230 1231 if (mask & FSX_XFLAGS) { 1232 xfs_set_diflags(ip, fa->fsx_xflags); 1233 xfs_diflags_to_linux(ip); 1234 } 1235 1236 /* 1237 * Only set the extent size hint if we've already determined that the 1238 * extent size hint should be set on the inode. If no extent size flags 1239 * are set on the inode then unconditionally clear the extent size hint. 1240 */ 1241 if (mask & FSX_EXTSIZE) { 1242 int extsize = 0; 1243 1244 if (ip->i_d.di_flags & 1245 (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1246 extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1247 ip->i_d.di_extsize = extsize; 1248 } 1249 1250 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1251 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1252 1253 XFS_STATS_INC(xs_ig_attrchg); 1254 1255 /* 1256 * If this is a synchronous mount, make sure that the 1257 * transaction goes to disk before returning to the user. 1258 * This is slightly sub-optimal in that truncates require 1259 * two sync transactions instead of one for wsync filesystems. 1260 * One for the truncate and one for the timestamps since we 1261 * don't want to change the timestamps unless we're sure the 1262 * truncate worked. Truncates are less than 1% of the laddis 1263 * mix so this probably isn't worth the trouble to optimize. 1264 */ 1265 if (mp->m_flags & XFS_MOUNT_WSYNC) 1266 xfs_trans_set_sync(tp); 1267 code = xfs_trans_commit(tp, 0); 1268 xfs_iunlock(ip, lock_flags); 1269 1270 /* 1271 * Release any dquot(s) the inode had kept before chown. 1272 */ 1273 xfs_qm_dqrele(olddquot); 1274 xfs_qm_dqrele(udqp); 1275 xfs_qm_dqrele(pdqp); 1276 1277 return code; 1278 1279 error_return: 1280 xfs_qm_dqrele(udqp); 1281 xfs_qm_dqrele(pdqp); 1282 xfs_trans_cancel(tp, 0); 1283 if (lock_flags) 1284 xfs_iunlock(ip, lock_flags); 1285 return code; 1286 } 1287 1288 STATIC int 1289 xfs_ioc_fssetxattr( 1290 xfs_inode_t *ip, 1291 struct file *filp, 1292 void __user *arg) 1293 { 1294 struct fsxattr fa; 1295 unsigned int mask; 1296 int error; 1297 1298 if (copy_from_user(&fa, arg, sizeof(fa))) 1299 return -EFAULT; 1300 1301 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID; 1302 if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) 1303 mask |= FSX_NONBLOCK; 1304 1305 error = mnt_want_write_file(filp); 1306 if (error) 1307 return error; 1308 error = xfs_ioctl_setattr(ip, &fa, mask); 1309 mnt_drop_write_file(filp); 1310 return error; 1311 } 1312 1313 STATIC int 1314 xfs_ioc_getxflags( 1315 xfs_inode_t *ip, 1316 void __user *arg) 1317 { 1318 unsigned int flags; 1319 1320 flags = xfs_di2lxflags(ip->i_d.di_flags); 1321 if (copy_to_user(arg, &flags, sizeof(flags))) 1322 return -EFAULT; 1323 return 0; 1324 } 1325 1326 STATIC int 1327 xfs_ioc_setxflags( 1328 xfs_inode_t *ip, 1329 struct file *filp, 1330 void __user *arg) 1331 { 1332 struct fsxattr fa; 1333 unsigned int flags; 1334 unsigned int mask; 1335 int error; 1336 1337 if (copy_from_user(&flags, arg, sizeof(flags))) 1338 return -EFAULT; 1339 1340 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1341 FS_NOATIME_FL | FS_NODUMP_FL | \ 1342 FS_SYNC_FL)) 1343 return -EOPNOTSUPP; 1344 1345 mask = FSX_XFLAGS; 1346 if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) 1347 mask |= FSX_NONBLOCK; 1348 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1349 1350 error = mnt_want_write_file(filp); 1351 if (error) 1352 return error; 1353 error = xfs_ioctl_setattr(ip, &fa, mask); 1354 mnt_drop_write_file(filp); 1355 return error; 1356 } 1357 1358 STATIC int 1359 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) 1360 { 1361 struct getbmap __user *base = (struct getbmap __user *)*ap; 1362 1363 /* copy only getbmap portion (not getbmapx) */ 1364 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1365 return -EFAULT; 1366 1367 *ap += sizeof(struct getbmap); 1368 return 0; 1369 } 1370 1371 STATIC int 1372 xfs_ioc_getbmap( 1373 struct xfs_inode *ip, 1374 int ioflags, 1375 unsigned int cmd, 1376 void __user *arg) 1377 { 1378 struct getbmapx bmx; 1379 int error; 1380 1381 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) 1382 return -EFAULT; 1383 1384 if (bmx.bmv_count < 2) 1385 return -EINVAL; 1386 1387 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1388 if (ioflags & XFS_IO_INVIS) 1389 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1390 1391 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, 1392 (__force struct getbmap *)arg+1); 1393 if (error) 1394 return error; 1395 1396 /* copy back header - only size of getbmap */ 1397 if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) 1398 return -EFAULT; 1399 return 0; 1400 } 1401 1402 STATIC int 1403 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) 1404 { 1405 struct getbmapx __user *base = (struct getbmapx __user *)*ap; 1406 1407 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1408 return -EFAULT; 1409 1410 *ap += sizeof(struct getbmapx); 1411 return 0; 1412 } 1413 1414 STATIC int 1415 xfs_ioc_getbmapx( 1416 struct xfs_inode *ip, 1417 void __user *arg) 1418 { 1419 struct getbmapx bmx; 1420 int error; 1421 1422 if (copy_from_user(&bmx, arg, sizeof(bmx))) 1423 return -EFAULT; 1424 1425 if (bmx.bmv_count < 2) 1426 return -EINVAL; 1427 1428 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1429 return -EINVAL; 1430 1431 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1432 (__force struct getbmapx *)arg+1); 1433 if (error) 1434 return error; 1435 1436 /* copy back header */ 1437 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) 1438 return -EFAULT; 1439 1440 return 0; 1441 } 1442 1443 int 1444 xfs_ioc_swapext( 1445 xfs_swapext_t *sxp) 1446 { 1447 xfs_inode_t *ip, *tip; 1448 struct fd f, tmp; 1449 int error = 0; 1450 1451 /* Pull information for the target fd */ 1452 f = fdget((int)sxp->sx_fdtarget); 1453 if (!f.file) { 1454 error = -EINVAL; 1455 goto out; 1456 } 1457 1458 if (!(f.file->f_mode & FMODE_WRITE) || 1459 !(f.file->f_mode & FMODE_READ) || 1460 (f.file->f_flags & O_APPEND)) { 1461 error = -EBADF; 1462 goto out_put_file; 1463 } 1464 1465 tmp = fdget((int)sxp->sx_fdtmp); 1466 if (!tmp.file) { 1467 error = -EINVAL; 1468 goto out_put_file; 1469 } 1470 1471 if (!(tmp.file->f_mode & FMODE_WRITE) || 1472 !(tmp.file->f_mode & FMODE_READ) || 1473 (tmp.file->f_flags & O_APPEND)) { 1474 error = -EBADF; 1475 goto out_put_tmp_file; 1476 } 1477 1478 if (IS_SWAPFILE(file_inode(f.file)) || 1479 IS_SWAPFILE(file_inode(tmp.file))) { 1480 error = -EINVAL; 1481 goto out_put_tmp_file; 1482 } 1483 1484 ip = XFS_I(file_inode(f.file)); 1485 tip = XFS_I(file_inode(tmp.file)); 1486 1487 if (ip->i_mount != tip->i_mount) { 1488 error = -EINVAL; 1489 goto out_put_tmp_file; 1490 } 1491 1492 if (ip->i_ino == tip->i_ino) { 1493 error = -EINVAL; 1494 goto out_put_tmp_file; 1495 } 1496 1497 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1498 error = -EIO; 1499 goto out_put_tmp_file; 1500 } 1501 1502 error = xfs_swap_extents(ip, tip, sxp); 1503 1504 out_put_tmp_file: 1505 fdput(tmp); 1506 out_put_file: 1507 fdput(f); 1508 out: 1509 return error; 1510 } 1511 1512 /* 1513 * Note: some of the ioctl's return positive numbers as a 1514 * byte count indicating success, such as readlink_by_handle. 1515 * So we don't "sign flip" like most other routines. This means 1516 * true errors need to be returned as a negative value. 1517 */ 1518 long 1519 xfs_file_ioctl( 1520 struct file *filp, 1521 unsigned int cmd, 1522 unsigned long p) 1523 { 1524 struct inode *inode = file_inode(filp); 1525 struct xfs_inode *ip = XFS_I(inode); 1526 struct xfs_mount *mp = ip->i_mount; 1527 void __user *arg = (void __user *)p; 1528 int ioflags = 0; 1529 int error; 1530 1531 if (filp->f_mode & FMODE_NOCMTIME) 1532 ioflags |= XFS_IO_INVIS; 1533 1534 trace_xfs_file_ioctl(ip); 1535 1536 switch (cmd) { 1537 case FITRIM: 1538 return xfs_ioc_trim(mp, arg); 1539 case XFS_IOC_ALLOCSP: 1540 case XFS_IOC_FREESP: 1541 case XFS_IOC_RESVSP: 1542 case XFS_IOC_UNRESVSP: 1543 case XFS_IOC_ALLOCSP64: 1544 case XFS_IOC_FREESP64: 1545 case XFS_IOC_RESVSP64: 1546 case XFS_IOC_UNRESVSP64: 1547 case XFS_IOC_ZERO_RANGE: { 1548 xfs_flock64_t bf; 1549 1550 if (copy_from_user(&bf, arg, sizeof(bf))) 1551 return -EFAULT; 1552 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf); 1553 } 1554 case XFS_IOC_DIOINFO: { 1555 struct dioattr da; 1556 xfs_buftarg_t *target = 1557 XFS_IS_REALTIME_INODE(ip) ? 1558 mp->m_rtdev_targp : mp->m_ddev_targp; 1559 1560 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1561 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1562 1563 if (copy_to_user(arg, &da, sizeof(da))) 1564 return -EFAULT; 1565 return 0; 1566 } 1567 1568 case XFS_IOC_FSBULKSTAT_SINGLE: 1569 case XFS_IOC_FSBULKSTAT: 1570 case XFS_IOC_FSINUMBERS: 1571 return xfs_ioc_bulkstat(mp, cmd, arg); 1572 1573 case XFS_IOC_FSGEOMETRY_V1: 1574 return xfs_ioc_fsgeometry_v1(mp, arg); 1575 1576 case XFS_IOC_FSGEOMETRY: 1577 return xfs_ioc_fsgeometry(mp, arg); 1578 1579 case XFS_IOC_GETVERSION: 1580 return put_user(inode->i_generation, (int __user *)arg); 1581 1582 case XFS_IOC_FSGETXATTR: 1583 return xfs_ioc_fsgetxattr(ip, 0, arg); 1584 case XFS_IOC_FSGETXATTRA: 1585 return xfs_ioc_fsgetxattr(ip, 1, arg); 1586 case XFS_IOC_FSSETXATTR: 1587 return xfs_ioc_fssetxattr(ip, filp, arg); 1588 case XFS_IOC_GETXFLAGS: 1589 return xfs_ioc_getxflags(ip, arg); 1590 case XFS_IOC_SETXFLAGS: 1591 return xfs_ioc_setxflags(ip, filp, arg); 1592 1593 case XFS_IOC_FSSETDM: { 1594 struct fsdmidata dmi; 1595 1596 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1597 return -EFAULT; 1598 1599 error = mnt_want_write_file(filp); 1600 if (error) 1601 return error; 1602 1603 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1604 dmi.fsd_dmstate); 1605 mnt_drop_write_file(filp); 1606 return error; 1607 } 1608 1609 case XFS_IOC_GETBMAP: 1610 case XFS_IOC_GETBMAPA: 1611 return xfs_ioc_getbmap(ip, ioflags, cmd, arg); 1612 1613 case XFS_IOC_GETBMAPX: 1614 return xfs_ioc_getbmapx(ip, arg); 1615 1616 case XFS_IOC_FD_TO_HANDLE: 1617 case XFS_IOC_PATH_TO_HANDLE: 1618 case XFS_IOC_PATH_TO_FSHANDLE: { 1619 xfs_fsop_handlereq_t hreq; 1620 1621 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1622 return -EFAULT; 1623 return xfs_find_handle(cmd, &hreq); 1624 } 1625 case XFS_IOC_OPEN_BY_HANDLE: { 1626 xfs_fsop_handlereq_t hreq; 1627 1628 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1629 return -EFAULT; 1630 return xfs_open_by_handle(filp, &hreq); 1631 } 1632 case XFS_IOC_FSSETDM_BY_HANDLE: 1633 return xfs_fssetdm_by_handle(filp, arg); 1634 1635 case XFS_IOC_READLINK_BY_HANDLE: { 1636 xfs_fsop_handlereq_t hreq; 1637 1638 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1639 return -EFAULT; 1640 return xfs_readlink_by_handle(filp, &hreq); 1641 } 1642 case XFS_IOC_ATTRLIST_BY_HANDLE: 1643 return xfs_attrlist_by_handle(filp, arg); 1644 1645 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1646 return xfs_attrmulti_by_handle(filp, arg); 1647 1648 case XFS_IOC_SWAPEXT: { 1649 struct xfs_swapext sxp; 1650 1651 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1652 return -EFAULT; 1653 error = mnt_want_write_file(filp); 1654 if (error) 1655 return error; 1656 error = xfs_ioc_swapext(&sxp); 1657 mnt_drop_write_file(filp); 1658 return error; 1659 } 1660 1661 case XFS_IOC_FSCOUNTS: { 1662 xfs_fsop_counts_t out; 1663 1664 error = xfs_fs_counts(mp, &out); 1665 if (error) 1666 return error; 1667 1668 if (copy_to_user(arg, &out, sizeof(out))) 1669 return -EFAULT; 1670 return 0; 1671 } 1672 1673 case XFS_IOC_SET_RESBLKS: { 1674 xfs_fsop_resblks_t inout; 1675 __uint64_t in; 1676 1677 if (!capable(CAP_SYS_ADMIN)) 1678 return -EPERM; 1679 1680 if (mp->m_flags & XFS_MOUNT_RDONLY) 1681 return -EROFS; 1682 1683 if (copy_from_user(&inout, arg, sizeof(inout))) 1684 return -EFAULT; 1685 1686 error = mnt_want_write_file(filp); 1687 if (error) 1688 return error; 1689 1690 /* input parameter is passed in resblks field of structure */ 1691 in = inout.resblks; 1692 error = xfs_reserve_blocks(mp, &in, &inout); 1693 mnt_drop_write_file(filp); 1694 if (error) 1695 return error; 1696 1697 if (copy_to_user(arg, &inout, sizeof(inout))) 1698 return -EFAULT; 1699 return 0; 1700 } 1701 1702 case XFS_IOC_GET_RESBLKS: { 1703 xfs_fsop_resblks_t out; 1704 1705 if (!capable(CAP_SYS_ADMIN)) 1706 return -EPERM; 1707 1708 error = xfs_reserve_blocks(mp, NULL, &out); 1709 if (error) 1710 return error; 1711 1712 if (copy_to_user(arg, &out, sizeof(out))) 1713 return -EFAULT; 1714 1715 return 0; 1716 } 1717 1718 case XFS_IOC_FSGROWFSDATA: { 1719 xfs_growfs_data_t in; 1720 1721 if (copy_from_user(&in, arg, sizeof(in))) 1722 return -EFAULT; 1723 1724 error = mnt_want_write_file(filp); 1725 if (error) 1726 return error; 1727 error = xfs_growfs_data(mp, &in); 1728 mnt_drop_write_file(filp); 1729 return error; 1730 } 1731 1732 case XFS_IOC_FSGROWFSLOG: { 1733 xfs_growfs_log_t in; 1734 1735 if (copy_from_user(&in, arg, sizeof(in))) 1736 return -EFAULT; 1737 1738 error = mnt_want_write_file(filp); 1739 if (error) 1740 return error; 1741 error = xfs_growfs_log(mp, &in); 1742 mnt_drop_write_file(filp); 1743 return error; 1744 } 1745 1746 case XFS_IOC_FSGROWFSRT: { 1747 xfs_growfs_rt_t in; 1748 1749 if (copy_from_user(&in, arg, sizeof(in))) 1750 return -EFAULT; 1751 1752 error = mnt_want_write_file(filp); 1753 if (error) 1754 return error; 1755 error = xfs_growfs_rt(mp, &in); 1756 mnt_drop_write_file(filp); 1757 return error; 1758 } 1759 1760 case XFS_IOC_GOINGDOWN: { 1761 __uint32_t in; 1762 1763 if (!capable(CAP_SYS_ADMIN)) 1764 return -EPERM; 1765 1766 if (get_user(in, (__uint32_t __user *)arg)) 1767 return -EFAULT; 1768 1769 return xfs_fs_goingdown(mp, in); 1770 } 1771 1772 case XFS_IOC_ERROR_INJECTION: { 1773 xfs_error_injection_t in; 1774 1775 if (!capable(CAP_SYS_ADMIN)) 1776 return -EPERM; 1777 1778 if (copy_from_user(&in, arg, sizeof(in))) 1779 return -EFAULT; 1780 1781 return xfs_errortag_add(in.errtag, mp); 1782 } 1783 1784 case XFS_IOC_ERROR_CLEARALL: 1785 if (!capable(CAP_SYS_ADMIN)) 1786 return -EPERM; 1787 1788 return xfs_errortag_clearall(mp, 1); 1789 1790 case XFS_IOC_FREE_EOFBLOCKS: { 1791 struct xfs_fs_eofblocks eofb; 1792 struct xfs_eofblocks keofb; 1793 1794 if (!capable(CAP_SYS_ADMIN)) 1795 return -EPERM; 1796 1797 if (mp->m_flags & XFS_MOUNT_RDONLY) 1798 return -EROFS; 1799 1800 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1801 return -EFAULT; 1802 1803 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 1804 if (error) 1805 return error; 1806 1807 return xfs_icache_free_eofblocks(mp, &keofb); 1808 } 1809 1810 default: 1811 return -ENOTTY; 1812 } 1813 } 1814