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