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 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 551 if (!attr_name) 552 goto out_kfree_ops; 553 554 error = 0; 555 for (i = 0; i < am_hreq.opcount; i++) { 556 ops[i].am_error = strncpy_from_user((char *)attr_name, 557 ops[i].am_attrname, MAXNAMELEN); 558 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 559 error = -ERANGE; 560 if (ops[i].am_error < 0) 561 break; 562 563 switch (ops[i].am_opcode) { 564 case ATTR_OP_GET: 565 ops[i].am_error = xfs_attrmulti_attr_get( 566 dentry->d_inode, attr_name, 567 ops[i].am_attrvalue, &ops[i].am_length, 568 ops[i].am_flags); 569 break; 570 case ATTR_OP_SET: 571 ops[i].am_error = mnt_want_write_file(parfilp); 572 if (ops[i].am_error) 573 break; 574 ops[i].am_error = xfs_attrmulti_attr_set( 575 dentry->d_inode, attr_name, 576 ops[i].am_attrvalue, ops[i].am_length, 577 ops[i].am_flags); 578 mnt_drop_write_file(parfilp); 579 break; 580 case ATTR_OP_REMOVE: 581 ops[i].am_error = mnt_want_write_file(parfilp); 582 if (ops[i].am_error) 583 break; 584 ops[i].am_error = xfs_attrmulti_attr_remove( 585 dentry->d_inode, attr_name, 586 ops[i].am_flags); 587 mnt_drop_write_file(parfilp); 588 break; 589 default: 590 ops[i].am_error = EINVAL; 591 } 592 } 593 594 if (copy_to_user(am_hreq.ops, ops, size)) 595 error = XFS_ERROR(EFAULT); 596 597 kfree(attr_name); 598 out_kfree_ops: 599 kfree(ops); 600 out_dput: 601 dput(dentry); 602 return -error; 603 } 604 605 int 606 xfs_ioc_space( 607 struct xfs_inode *ip, 608 struct inode *inode, 609 struct file *filp, 610 int ioflags, 611 unsigned int cmd, 612 xfs_flock64_t *bf) 613 { 614 struct xfs_mount *mp = ip->i_mount; 615 struct xfs_trans *tp; 616 struct iattr iattr; 617 bool setprealloc = false; 618 bool clrprealloc = false; 619 int error; 620 621 /* 622 * Only allow the sys admin to reserve space unless 623 * unwritten extents are enabled. 624 */ 625 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && 626 !capable(CAP_SYS_ADMIN)) 627 return -XFS_ERROR(EPERM); 628 629 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 630 return -XFS_ERROR(EPERM); 631 632 if (!(filp->f_mode & FMODE_WRITE)) 633 return -XFS_ERROR(EBADF); 634 635 if (!S_ISREG(inode->i_mode)) 636 return -XFS_ERROR(EINVAL); 637 638 error = mnt_want_write_file(filp); 639 if (error) 640 return error; 641 642 xfs_ilock(ip, XFS_IOLOCK_EXCL); 643 644 switch (bf->l_whence) { 645 case 0: /*SEEK_SET*/ 646 break; 647 case 1: /*SEEK_CUR*/ 648 bf->l_start += filp->f_pos; 649 break; 650 case 2: /*SEEK_END*/ 651 bf->l_start += XFS_ISIZE(ip); 652 break; 653 default: 654 error = XFS_ERROR(EINVAL); 655 goto out_unlock; 656 } 657 658 /* 659 * length of <= 0 for resv/unresv/zero is invalid. length for 660 * alloc/free is ignored completely and we have no idea what userspace 661 * might have set it to, so set it to zero to allow range 662 * checks to pass. 663 */ 664 switch (cmd) { 665 case XFS_IOC_ZERO_RANGE: 666 case XFS_IOC_RESVSP: 667 case XFS_IOC_RESVSP64: 668 case XFS_IOC_UNRESVSP: 669 case XFS_IOC_UNRESVSP64: 670 if (bf->l_len <= 0) { 671 error = XFS_ERROR(EINVAL); 672 goto out_unlock; 673 } 674 break; 675 default: 676 bf->l_len = 0; 677 break; 678 } 679 680 if (bf->l_start < 0 || 681 bf->l_start > mp->m_super->s_maxbytes || 682 bf->l_start + bf->l_len < 0 || 683 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) { 684 error = XFS_ERROR(EINVAL); 685 goto out_unlock; 686 } 687 688 switch (cmd) { 689 case XFS_IOC_ZERO_RANGE: 690 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); 691 if (!error) 692 setprealloc = true; 693 break; 694 case XFS_IOC_RESVSP: 695 case XFS_IOC_RESVSP64: 696 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, 697 XFS_BMAPI_PREALLOC); 698 if (!error) 699 setprealloc = true; 700 break; 701 case XFS_IOC_UNRESVSP: 702 case XFS_IOC_UNRESVSP64: 703 error = xfs_free_file_space(ip, bf->l_start, bf->l_len); 704 break; 705 case XFS_IOC_ALLOCSP: 706 case XFS_IOC_ALLOCSP64: 707 case XFS_IOC_FREESP: 708 case XFS_IOC_FREESP64: 709 if (bf->l_start > XFS_ISIZE(ip)) { 710 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 711 bf->l_start - XFS_ISIZE(ip), 0); 712 if (error) 713 goto out_unlock; 714 } 715 716 iattr.ia_valid = ATTR_SIZE; 717 iattr.ia_size = bf->l_start; 718 719 error = xfs_setattr_size(ip, &iattr); 720 if (!error) 721 clrprealloc = true; 722 break; 723 default: 724 ASSERT(0); 725 error = XFS_ERROR(EINVAL); 726 } 727 728 if (error) 729 goto out_unlock; 730 731 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); 732 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0); 733 if (error) { 734 xfs_trans_cancel(tp, 0); 735 goto out_unlock; 736 } 737 738 xfs_ilock(ip, XFS_ILOCK_EXCL); 739 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 740 741 if (!(ioflags & IO_INVIS)) { 742 ip->i_d.di_mode &= ~S_ISUID; 743 if (ip->i_d.di_mode & S_IXGRP) 744 ip->i_d.di_mode &= ~S_ISGID; 745 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); 746 } 747 748 if (setprealloc) 749 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; 750 else if (clrprealloc) 751 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; 752 753 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 754 if (filp->f_flags & O_DSYNC) 755 xfs_trans_set_sync(tp); 756 error = xfs_trans_commit(tp, 0); 757 758 out_unlock: 759 xfs_iunlock(ip, XFS_IOLOCK_EXCL); 760 mnt_drop_write_file(filp); 761 return -error; 762 } 763 764 STATIC int 765 xfs_ioc_bulkstat( 766 xfs_mount_t *mp, 767 unsigned int cmd, 768 void __user *arg) 769 { 770 xfs_fsop_bulkreq_t bulkreq; 771 int count; /* # of records returned */ 772 xfs_ino_t inlast; /* last inode number */ 773 int done; 774 int error; 775 776 /* done = 1 if there are more stats to get and if bulkstat */ 777 /* should be called again (unused here, but used in dmapi) */ 778 779 if (!capable(CAP_SYS_ADMIN)) 780 return -EPERM; 781 782 if (XFS_FORCED_SHUTDOWN(mp)) 783 return -XFS_ERROR(EIO); 784 785 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) 786 return -XFS_ERROR(EFAULT); 787 788 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) 789 return -XFS_ERROR(EFAULT); 790 791 if ((count = bulkreq.icount) <= 0) 792 return -XFS_ERROR(EINVAL); 793 794 if (bulkreq.ubuffer == NULL) 795 return -XFS_ERROR(EINVAL); 796 797 if (cmd == XFS_IOC_FSINUMBERS) 798 error = xfs_inumbers(mp, &inlast, &count, 799 bulkreq.ubuffer, xfs_inumbers_fmt); 800 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) 801 error = xfs_bulkstat_single(mp, &inlast, 802 bulkreq.ubuffer, &done); 803 else /* XFS_IOC_FSBULKSTAT */ 804 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, 805 sizeof(xfs_bstat_t), bulkreq.ubuffer, 806 &done); 807 808 if (error) 809 return -error; 810 811 if (bulkreq.ocount != NULL) { 812 if (copy_to_user(bulkreq.lastip, &inlast, 813 sizeof(xfs_ino_t))) 814 return -XFS_ERROR(EFAULT); 815 816 if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) 817 return -XFS_ERROR(EFAULT); 818 } 819 820 return 0; 821 } 822 823 STATIC int 824 xfs_ioc_fsgeometry_v1( 825 xfs_mount_t *mp, 826 void __user *arg) 827 { 828 xfs_fsop_geom_t fsgeo; 829 int error; 830 831 error = xfs_fs_geometry(mp, &fsgeo, 3); 832 if (error) 833 return -error; 834 835 /* 836 * Caller should have passed an argument of type 837 * xfs_fsop_geom_v1_t. This is a proper subset of the 838 * xfs_fsop_geom_t that xfs_fs_geometry() fills in. 839 */ 840 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) 841 return -XFS_ERROR(EFAULT); 842 return 0; 843 } 844 845 STATIC int 846 xfs_ioc_fsgeometry( 847 xfs_mount_t *mp, 848 void __user *arg) 849 { 850 xfs_fsop_geom_t fsgeo; 851 int error; 852 853 error = xfs_fs_geometry(mp, &fsgeo, 4); 854 if (error) 855 return -error; 856 857 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) 858 return -XFS_ERROR(EFAULT); 859 return 0; 860 } 861 862 /* 863 * Linux extended inode flags interface. 864 */ 865 866 STATIC unsigned int 867 xfs_merge_ioc_xflags( 868 unsigned int flags, 869 unsigned int start) 870 { 871 unsigned int xflags = start; 872 873 if (flags & FS_IMMUTABLE_FL) 874 xflags |= XFS_XFLAG_IMMUTABLE; 875 else 876 xflags &= ~XFS_XFLAG_IMMUTABLE; 877 if (flags & FS_APPEND_FL) 878 xflags |= XFS_XFLAG_APPEND; 879 else 880 xflags &= ~XFS_XFLAG_APPEND; 881 if (flags & FS_SYNC_FL) 882 xflags |= XFS_XFLAG_SYNC; 883 else 884 xflags &= ~XFS_XFLAG_SYNC; 885 if (flags & FS_NOATIME_FL) 886 xflags |= XFS_XFLAG_NOATIME; 887 else 888 xflags &= ~XFS_XFLAG_NOATIME; 889 if (flags & FS_NODUMP_FL) 890 xflags |= XFS_XFLAG_NODUMP; 891 else 892 xflags &= ~XFS_XFLAG_NODUMP; 893 894 return xflags; 895 } 896 897 STATIC unsigned int 898 xfs_di2lxflags( 899 __uint16_t di_flags) 900 { 901 unsigned int flags = 0; 902 903 if (di_flags & XFS_DIFLAG_IMMUTABLE) 904 flags |= FS_IMMUTABLE_FL; 905 if (di_flags & XFS_DIFLAG_APPEND) 906 flags |= FS_APPEND_FL; 907 if (di_flags & XFS_DIFLAG_SYNC) 908 flags |= FS_SYNC_FL; 909 if (di_flags & XFS_DIFLAG_NOATIME) 910 flags |= FS_NOATIME_FL; 911 if (di_flags & XFS_DIFLAG_NODUMP) 912 flags |= FS_NODUMP_FL; 913 return flags; 914 } 915 916 STATIC int 917 xfs_ioc_fsgetxattr( 918 xfs_inode_t *ip, 919 int attr, 920 void __user *arg) 921 { 922 struct fsxattr fa; 923 924 memset(&fa, 0, sizeof(struct fsxattr)); 925 926 xfs_ilock(ip, XFS_ILOCK_SHARED); 927 fa.fsx_xflags = xfs_ip2xflags(ip); 928 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 929 fa.fsx_projid = xfs_get_projid(ip); 930 931 if (attr) { 932 if (ip->i_afp) { 933 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 934 fa.fsx_nextents = ip->i_afp->if_bytes / 935 sizeof(xfs_bmbt_rec_t); 936 else 937 fa.fsx_nextents = ip->i_d.di_anextents; 938 } else 939 fa.fsx_nextents = 0; 940 } else { 941 if (ip->i_df.if_flags & XFS_IFEXTENTS) 942 fa.fsx_nextents = ip->i_df.if_bytes / 943 sizeof(xfs_bmbt_rec_t); 944 else 945 fa.fsx_nextents = ip->i_d.di_nextents; 946 } 947 xfs_iunlock(ip, XFS_ILOCK_SHARED); 948 949 if (copy_to_user(arg, &fa, sizeof(fa))) 950 return -EFAULT; 951 return 0; 952 } 953 954 STATIC void 955 xfs_set_diflags( 956 struct xfs_inode *ip, 957 unsigned int xflags) 958 { 959 unsigned int di_flags; 960 961 /* can't set PREALLOC this way, just preserve it */ 962 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 963 if (xflags & XFS_XFLAG_IMMUTABLE) 964 di_flags |= XFS_DIFLAG_IMMUTABLE; 965 if (xflags & XFS_XFLAG_APPEND) 966 di_flags |= XFS_DIFLAG_APPEND; 967 if (xflags & XFS_XFLAG_SYNC) 968 di_flags |= XFS_DIFLAG_SYNC; 969 if (xflags & XFS_XFLAG_NOATIME) 970 di_flags |= XFS_DIFLAG_NOATIME; 971 if (xflags & XFS_XFLAG_NODUMP) 972 di_flags |= XFS_DIFLAG_NODUMP; 973 if (xflags & XFS_XFLAG_PROJINHERIT) 974 di_flags |= XFS_DIFLAG_PROJINHERIT; 975 if (xflags & XFS_XFLAG_NODEFRAG) 976 di_flags |= XFS_DIFLAG_NODEFRAG; 977 if (xflags & XFS_XFLAG_FILESTREAM) 978 di_flags |= XFS_DIFLAG_FILESTREAM; 979 if (S_ISDIR(ip->i_d.di_mode)) { 980 if (xflags & XFS_XFLAG_RTINHERIT) 981 di_flags |= XFS_DIFLAG_RTINHERIT; 982 if (xflags & XFS_XFLAG_NOSYMLINKS) 983 di_flags |= XFS_DIFLAG_NOSYMLINKS; 984 if (xflags & XFS_XFLAG_EXTSZINHERIT) 985 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 986 } else if (S_ISREG(ip->i_d.di_mode)) { 987 if (xflags & XFS_XFLAG_REALTIME) 988 di_flags |= XFS_DIFLAG_REALTIME; 989 if (xflags & XFS_XFLAG_EXTSIZE) 990 di_flags |= XFS_DIFLAG_EXTSIZE; 991 } 992 993 ip->i_d.di_flags = di_flags; 994 } 995 996 STATIC void 997 xfs_diflags_to_linux( 998 struct xfs_inode *ip) 999 { 1000 struct inode *inode = VFS_I(ip); 1001 unsigned int xflags = xfs_ip2xflags(ip); 1002 1003 if (xflags & XFS_XFLAG_IMMUTABLE) 1004 inode->i_flags |= S_IMMUTABLE; 1005 else 1006 inode->i_flags &= ~S_IMMUTABLE; 1007 if (xflags & XFS_XFLAG_APPEND) 1008 inode->i_flags |= S_APPEND; 1009 else 1010 inode->i_flags &= ~S_APPEND; 1011 if (xflags & XFS_XFLAG_SYNC) 1012 inode->i_flags |= S_SYNC; 1013 else 1014 inode->i_flags &= ~S_SYNC; 1015 if (xflags & XFS_XFLAG_NOATIME) 1016 inode->i_flags |= S_NOATIME; 1017 else 1018 inode->i_flags &= ~S_NOATIME; 1019 } 1020 1021 #define FSX_PROJID 1 1022 #define FSX_EXTSIZE 2 1023 #define FSX_XFLAGS 4 1024 #define FSX_NONBLOCK 8 1025 1026 STATIC int 1027 xfs_ioctl_setattr( 1028 xfs_inode_t *ip, 1029 struct fsxattr *fa, 1030 int mask) 1031 { 1032 struct xfs_mount *mp = ip->i_mount; 1033 struct xfs_trans *tp; 1034 unsigned int lock_flags = 0; 1035 struct xfs_dquot *udqp = NULL; 1036 struct xfs_dquot *pdqp = NULL; 1037 struct xfs_dquot *olddquot = NULL; 1038 int code; 1039 1040 trace_xfs_ioctl_setattr(ip); 1041 1042 if (mp->m_flags & XFS_MOUNT_RDONLY) 1043 return XFS_ERROR(EROFS); 1044 if (XFS_FORCED_SHUTDOWN(mp)) 1045 return XFS_ERROR(EIO); 1046 1047 /* 1048 * Disallow 32bit project ids when projid32bit feature is not enabled. 1049 */ 1050 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) && 1051 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1052 return XFS_ERROR(EINVAL); 1053 1054 /* 1055 * If disk quotas is on, we make sure that the dquots do exist on disk, 1056 * before we start any other transactions. Trying to do this later 1057 * is messy. We don't care to take a readlock to look at the ids 1058 * in inode here, because we can't hold it across the trans_reserve. 1059 * If the IDs do change before we take the ilock, we're covered 1060 * because the i_*dquot fields will get updated anyway. 1061 */ 1062 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) { 1063 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1064 ip->i_d.di_gid, fa->fsx_projid, 1065 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1066 if (code) 1067 return code; 1068 } 1069 1070 /* 1071 * For the other attributes, we acquire the inode lock and 1072 * first do an error checking pass. 1073 */ 1074 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); 1075 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); 1076 if (code) 1077 goto error_return; 1078 1079 lock_flags = XFS_ILOCK_EXCL; 1080 xfs_ilock(ip, lock_flags); 1081 1082 /* 1083 * CAP_FOWNER overrides the following restrictions: 1084 * 1085 * The user ID of the calling process must be equal 1086 * to the file owner ID, except in cases where the 1087 * CAP_FSETID capability is applicable. 1088 */ 1089 if (!inode_owner_or_capable(VFS_I(ip))) { 1090 code = XFS_ERROR(EPERM); 1091 goto error_return; 1092 } 1093 1094 /* 1095 * Do a quota reservation only if projid is actually going to change. 1096 * Only allow changing of projid from init_user_ns since it is a 1097 * non user namespace aware identifier. 1098 */ 1099 if (mask & FSX_PROJID) { 1100 if (current_user_ns() != &init_user_ns) { 1101 code = XFS_ERROR(EINVAL); 1102 goto error_return; 1103 } 1104 1105 if (XFS_IS_QUOTA_RUNNING(mp) && 1106 XFS_IS_PQUOTA_ON(mp) && 1107 xfs_get_projid(ip) != fa->fsx_projid) { 1108 ASSERT(tp); 1109 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, 1110 pdqp, capable(CAP_FOWNER) ? 1111 XFS_QMOPT_FORCE_RES : 0); 1112 if (code) /* out of quota */ 1113 goto error_return; 1114 } 1115 } 1116 1117 if (mask & FSX_EXTSIZE) { 1118 /* 1119 * Can't change extent size if any extents are allocated. 1120 */ 1121 if (ip->i_d.di_nextents && 1122 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != 1123 fa->fsx_extsize)) { 1124 code = XFS_ERROR(EINVAL); /* EFBIG? */ 1125 goto error_return; 1126 } 1127 1128 /* 1129 * Extent size must be a multiple of the appropriate block 1130 * size, if set at all. It must also be smaller than the 1131 * maximum extent size supported by the filesystem. 1132 * 1133 * Also, for non-realtime files, limit the extent size hint to 1134 * half the size of the AGs in the filesystem so alignment 1135 * doesn't result in extents larger than an AG. 1136 */ 1137 if (fa->fsx_extsize != 0) { 1138 xfs_extlen_t size; 1139 xfs_fsblock_t extsize_fsb; 1140 1141 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1142 if (extsize_fsb > MAXEXTLEN) { 1143 code = XFS_ERROR(EINVAL); 1144 goto error_return; 1145 } 1146 1147 if (XFS_IS_REALTIME_INODE(ip) || 1148 ((mask & FSX_XFLAGS) && 1149 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) { 1150 size = mp->m_sb.sb_rextsize << 1151 mp->m_sb.sb_blocklog; 1152 } else { 1153 size = mp->m_sb.sb_blocksize; 1154 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) { 1155 code = XFS_ERROR(EINVAL); 1156 goto error_return; 1157 } 1158 } 1159 1160 if (fa->fsx_extsize % size) { 1161 code = XFS_ERROR(EINVAL); 1162 goto error_return; 1163 } 1164 } 1165 } 1166 1167 1168 if (mask & FSX_XFLAGS) { 1169 /* 1170 * Can't change realtime flag if any extents are allocated. 1171 */ 1172 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1173 (XFS_IS_REALTIME_INODE(ip)) != 1174 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1175 code = XFS_ERROR(EINVAL); /* EFBIG? */ 1176 goto error_return; 1177 } 1178 1179 /* 1180 * If realtime flag is set then must have realtime data. 1181 */ 1182 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1183 if ((mp->m_sb.sb_rblocks == 0) || 1184 (mp->m_sb.sb_rextsize == 0) || 1185 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { 1186 code = XFS_ERROR(EINVAL); 1187 goto error_return; 1188 } 1189 } 1190 1191 /* 1192 * Can't modify an immutable/append-only file unless 1193 * we have appropriate permission. 1194 */ 1195 if ((ip->i_d.di_flags & 1196 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || 1197 (fa->fsx_xflags & 1198 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && 1199 !capable(CAP_LINUX_IMMUTABLE)) { 1200 code = XFS_ERROR(EPERM); 1201 goto error_return; 1202 } 1203 } 1204 1205 xfs_trans_ijoin(tp, ip, 0); 1206 1207 /* 1208 * Change file ownership. Must be the owner or privileged. 1209 */ 1210 if (mask & FSX_PROJID) { 1211 /* 1212 * CAP_FSETID overrides the following restrictions: 1213 * 1214 * The set-user-ID and set-group-ID bits of a file will be 1215 * cleared upon successful return from chown() 1216 */ 1217 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && 1218 !inode_capable(VFS_I(ip), CAP_FSETID)) 1219 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); 1220 1221 /* 1222 * Change the ownerships and register quota modifications 1223 * in the transaction. 1224 */ 1225 if (xfs_get_projid(ip) != fa->fsx_projid) { 1226 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1227 olddquot = xfs_qm_vop_chown(tp, ip, 1228 &ip->i_pdquot, pdqp); 1229 } 1230 xfs_set_projid(ip, fa->fsx_projid); 1231 1232 /* 1233 * We may have to rev the inode as well as 1234 * the superblock version number since projids didn't 1235 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. 1236 */ 1237 if (ip->i_d.di_version == 1) 1238 xfs_bump_ino_vers2(tp, ip); 1239 } 1240 1241 } 1242 1243 if (mask & FSX_EXTSIZE) 1244 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1245 if (mask & FSX_XFLAGS) { 1246 xfs_set_diflags(ip, fa->fsx_xflags); 1247 xfs_diflags_to_linux(ip); 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 = *ap; 1362 1363 /* copy only getbmap portion (not getbmapx) */ 1364 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1365 return XFS_ERROR(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 -XFS_ERROR(EFAULT); 1383 1384 if (bmx.bmv_count < 2) 1385 return -XFS_ERROR(EINVAL); 1386 1387 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1388 if (ioflags & IO_INVIS) 1389 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1390 1391 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, 1392 (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 -XFS_ERROR(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 = *ap; 1406 1407 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1408 return XFS_ERROR(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 -XFS_ERROR(EFAULT); 1424 1425 if (bmx.bmv_count < 2) 1426 return -XFS_ERROR(EINVAL); 1427 1428 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1429 return -XFS_ERROR(EINVAL); 1430 1431 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1432 (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 -XFS_ERROR(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 = XFS_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 = XFS_ERROR(EBADF); 1462 goto out_put_file; 1463 } 1464 1465 tmp = fdget((int)sxp->sx_fdtmp); 1466 if (!tmp.file) { 1467 error = XFS_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 = XFS_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 = XFS_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 = XFS_ERROR(EINVAL); 1489 goto out_put_tmp_file; 1490 } 1491 1492 if (ip->i_ino == tip->i_ino) { 1493 error = XFS_ERROR(EINVAL); 1494 goto out_put_tmp_file; 1495 } 1496 1497 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1498 error = XFS_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 |= 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 -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(EROFS); 1682 1683 if (copy_from_user(&inout, arg, sizeof(inout))) 1684 return -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(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 -XFS_ERROR(EFAULT); 1768 1769 error = xfs_fs_goingdown(mp, in); 1770 return -error; 1771 } 1772 1773 case XFS_IOC_ERROR_INJECTION: { 1774 xfs_error_injection_t in; 1775 1776 if (!capable(CAP_SYS_ADMIN)) 1777 return -EPERM; 1778 1779 if (copy_from_user(&in, arg, sizeof(in))) 1780 return -XFS_ERROR(EFAULT); 1781 1782 error = xfs_errortag_add(in.errtag, mp); 1783 return -error; 1784 } 1785 1786 case XFS_IOC_ERROR_CLEARALL: 1787 if (!capable(CAP_SYS_ADMIN)) 1788 return -EPERM; 1789 1790 error = xfs_errortag_clearall(mp, 1); 1791 return -error; 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 -XFS_ERROR(EROFS); 1802 1803 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1804 return -XFS_ERROR(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