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 #include "xfs_pnfs.h" 43 #include "xfs_acl.h" 44 45 #include <linux/capability.h> 46 #include <linux/dcache.h> 47 #include <linux/mount.h> 48 #include <linux/namei.h> 49 #include <linux/pagemap.h> 50 #include <linux/slab.h> 51 #include <linux/exportfs.h> 52 53 /* 54 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 55 * a file or fs handle. 56 * 57 * XFS_IOC_PATH_TO_FSHANDLE 58 * returns fs handle for a mount point or path within that mount point 59 * XFS_IOC_FD_TO_HANDLE 60 * returns full handle for a FD opened in user space 61 * XFS_IOC_PATH_TO_HANDLE 62 * returns full handle for a path 63 */ 64 int 65 xfs_find_handle( 66 unsigned int cmd, 67 xfs_fsop_handlereq_t *hreq) 68 { 69 int hsize; 70 xfs_handle_t handle; 71 struct inode *inode; 72 struct fd f = {NULL}; 73 struct path path; 74 int error; 75 struct xfs_inode *ip; 76 77 if (cmd == XFS_IOC_FD_TO_HANDLE) { 78 f = fdget(hreq->fd); 79 if (!f.file) 80 return -EBADF; 81 inode = file_inode(f.file); 82 } else { 83 error = user_lpath((const char __user *)hreq->path, &path); 84 if (error) 85 return error; 86 inode = d_inode(path.dentry); 87 } 88 ip = XFS_I(inode); 89 90 /* 91 * We can only generate handles for inodes residing on a XFS filesystem, 92 * and only for regular files, directories or symbolic links. 93 */ 94 error = -EINVAL; 95 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 96 goto out_put; 97 98 error = -EBADF; 99 if (!S_ISREG(inode->i_mode) && 100 !S_ISDIR(inode->i_mode) && 101 !S_ISLNK(inode->i_mode)) 102 goto out_put; 103 104 105 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 106 107 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 108 /* 109 * This handle only contains an fsid, zero the rest. 110 */ 111 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 112 hsize = sizeof(xfs_fsid_t); 113 } else { 114 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 115 sizeof(handle.ha_fid.fid_len); 116 handle.ha_fid.fid_pad = 0; 117 handle.ha_fid.fid_gen = ip->i_d.di_gen; 118 handle.ha_fid.fid_ino = ip->i_ino; 119 120 hsize = XFS_HSIZE(handle); 121 } 122 123 error = -EFAULT; 124 if (copy_to_user(hreq->ohandle, &handle, hsize) || 125 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 126 goto out_put; 127 128 error = 0; 129 130 out_put: 131 if (cmd == XFS_IOC_FD_TO_HANDLE) 132 fdput(f); 133 else 134 path_put(&path); 135 return error; 136 } 137 138 /* 139 * No need to do permission checks on the various pathname components 140 * as the handle operations are privileged. 141 */ 142 STATIC int 143 xfs_handle_acceptable( 144 void *context, 145 struct dentry *dentry) 146 { 147 return 1; 148 } 149 150 /* 151 * Convert userspace handle data into a dentry. 152 */ 153 struct dentry * 154 xfs_handle_to_dentry( 155 struct file *parfilp, 156 void __user *uhandle, 157 u32 hlen) 158 { 159 xfs_handle_t handle; 160 struct xfs_fid64 fid; 161 162 /* 163 * Only allow handle opens under a directory. 164 */ 165 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 166 return ERR_PTR(-ENOTDIR); 167 168 if (hlen != sizeof(xfs_handle_t)) 169 return ERR_PTR(-EINVAL); 170 if (copy_from_user(&handle, uhandle, hlen)) 171 return ERR_PTR(-EFAULT); 172 if (handle.ha_fid.fid_len != 173 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 174 return ERR_PTR(-EINVAL); 175 176 memset(&fid, 0, sizeof(struct fid)); 177 fid.ino = handle.ha_fid.fid_ino; 178 fid.gen = handle.ha_fid.fid_gen; 179 180 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 181 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 182 xfs_handle_acceptable, NULL); 183 } 184 185 STATIC struct dentry * 186 xfs_handlereq_to_dentry( 187 struct file *parfilp, 188 xfs_fsop_handlereq_t *hreq) 189 { 190 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 191 } 192 193 int 194 xfs_open_by_handle( 195 struct file *parfilp, 196 xfs_fsop_handlereq_t *hreq) 197 { 198 const struct cred *cred = current_cred(); 199 int error; 200 int fd; 201 int permflag; 202 struct file *filp; 203 struct inode *inode; 204 struct dentry *dentry; 205 fmode_t fmode; 206 struct path path; 207 208 if (!capable(CAP_SYS_ADMIN)) 209 return -EPERM; 210 211 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 212 if (IS_ERR(dentry)) 213 return PTR_ERR(dentry); 214 inode = d_inode(dentry); 215 216 /* Restrict xfs_open_by_handle to directories & regular files. */ 217 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 218 error = -EPERM; 219 goto out_dput; 220 } 221 222 #if BITS_PER_LONG != 32 223 hreq->oflags |= O_LARGEFILE; 224 #endif 225 226 permflag = hreq->oflags; 227 fmode = OPEN_FMODE(permflag); 228 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 229 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 230 error = -EPERM; 231 goto out_dput; 232 } 233 234 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 235 error = -EACCES; 236 goto out_dput; 237 } 238 239 /* Can't write directories. */ 240 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 241 error = -EISDIR; 242 goto out_dput; 243 } 244 245 fd = get_unused_fd_flags(0); 246 if (fd < 0) { 247 error = fd; 248 goto out_dput; 249 } 250 251 path.mnt = parfilp->f_path.mnt; 252 path.dentry = dentry; 253 filp = dentry_open(&path, hreq->oflags, cred); 254 dput(dentry); 255 if (IS_ERR(filp)) { 256 put_unused_fd(fd); 257 return PTR_ERR(filp); 258 } 259 260 if (S_ISREG(inode->i_mode)) { 261 filp->f_flags |= O_NOATIME; 262 filp->f_mode |= FMODE_NOCMTIME; 263 } 264 265 fd_install(fd, filp); 266 return fd; 267 268 out_dput: 269 dput(dentry); 270 return error; 271 } 272 273 int 274 xfs_readlink_by_handle( 275 struct file *parfilp, 276 xfs_fsop_handlereq_t *hreq) 277 { 278 struct dentry *dentry; 279 __u32 olen; 280 void *link; 281 int error; 282 283 if (!capable(CAP_SYS_ADMIN)) 284 return -EPERM; 285 286 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 287 if (IS_ERR(dentry)) 288 return PTR_ERR(dentry); 289 290 /* Restrict this handle operation to symlinks only. */ 291 if (!d_is_symlink(dentry)) { 292 error = -EINVAL; 293 goto out_dput; 294 } 295 296 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 297 error = -EFAULT; 298 goto out_dput; 299 } 300 301 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); 302 if (!link) { 303 error = -ENOMEM; 304 goto out_dput; 305 } 306 307 error = xfs_readlink(XFS_I(d_inode(dentry)), link); 308 if (error) 309 goto out_kfree; 310 error = readlink_copy(hreq->ohandle, olen, link); 311 if (error) 312 goto out_kfree; 313 314 out_kfree: 315 kfree(link); 316 out_dput: 317 dput(dentry); 318 return error; 319 } 320 321 int 322 xfs_set_dmattrs( 323 xfs_inode_t *ip, 324 u_int evmask, 325 u_int16_t state) 326 { 327 xfs_mount_t *mp = ip->i_mount; 328 xfs_trans_t *tp; 329 int error; 330 331 if (!capable(CAP_SYS_ADMIN)) 332 return -EPERM; 333 334 if (XFS_FORCED_SHUTDOWN(mp)) 335 return -EIO; 336 337 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); 338 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); 339 if (error) { 340 xfs_trans_cancel(tp); 341 return error; 342 } 343 xfs_ilock(ip, XFS_ILOCK_EXCL); 344 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 345 346 ip->i_d.di_dmevmask = evmask; 347 ip->i_d.di_dmstate = state; 348 349 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 350 error = xfs_trans_commit(tp); 351 352 return error; 353 } 354 355 STATIC int 356 xfs_fssetdm_by_handle( 357 struct file *parfilp, 358 void __user *arg) 359 { 360 int error; 361 struct fsdmidata fsd; 362 xfs_fsop_setdm_handlereq_t dmhreq; 363 struct dentry *dentry; 364 365 if (!capable(CAP_MKNOD)) 366 return -EPERM; 367 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) 368 return -EFAULT; 369 370 error = mnt_want_write_file(parfilp); 371 if (error) 372 return error; 373 374 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); 375 if (IS_ERR(dentry)) { 376 mnt_drop_write_file(parfilp); 377 return PTR_ERR(dentry); 378 } 379 380 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) { 381 error = -EPERM; 382 goto out; 383 } 384 385 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { 386 error = -EFAULT; 387 goto out; 388 } 389 390 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask, 391 fsd.fsd_dmstate); 392 393 out: 394 mnt_drop_write_file(parfilp); 395 dput(dentry); 396 return error; 397 } 398 399 STATIC int 400 xfs_attrlist_by_handle( 401 struct file *parfilp, 402 void __user *arg) 403 { 404 int error = -ENOMEM; 405 attrlist_cursor_kern_t *cursor; 406 xfs_fsop_attrlist_handlereq_t al_hreq; 407 struct dentry *dentry; 408 char *kbuf; 409 410 if (!capable(CAP_SYS_ADMIN)) 411 return -EPERM; 412 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 413 return -EFAULT; 414 if (al_hreq.buflen < sizeof(struct attrlist) || 415 al_hreq.buflen > XFS_XATTR_LIST_MAX) 416 return -EINVAL; 417 418 /* 419 * Reject flags, only allow namespaces. 420 */ 421 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 422 return -EINVAL; 423 424 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 425 if (IS_ERR(dentry)) 426 return PTR_ERR(dentry); 427 428 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); 429 if (!kbuf) 430 goto out_dput; 431 432 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 433 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen, 434 al_hreq.flags, cursor); 435 if (error) 436 goto out_kfree; 437 438 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 439 error = -EFAULT; 440 441 out_kfree: 442 kmem_free(kbuf); 443 out_dput: 444 dput(dentry); 445 return error; 446 } 447 448 int 449 xfs_attrmulti_attr_get( 450 struct inode *inode, 451 unsigned char *name, 452 unsigned char __user *ubuf, 453 __uint32_t *len, 454 __uint32_t flags) 455 { 456 unsigned char *kbuf; 457 int error = -EFAULT; 458 459 if (*len > XFS_XATTR_SIZE_MAX) 460 return -EINVAL; 461 kbuf = kmem_zalloc_large(*len, KM_SLEEP); 462 if (!kbuf) 463 return -ENOMEM; 464 465 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); 466 if (error) 467 goto out_kfree; 468 469 if (copy_to_user(ubuf, kbuf, *len)) 470 error = -EFAULT; 471 472 out_kfree: 473 kmem_free(kbuf); 474 return error; 475 } 476 477 int 478 xfs_attrmulti_attr_set( 479 struct inode *inode, 480 unsigned char *name, 481 const unsigned char __user *ubuf, 482 __uint32_t len, 483 __uint32_t flags) 484 { 485 unsigned char *kbuf; 486 int error; 487 488 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 489 return -EPERM; 490 if (len > XFS_XATTR_SIZE_MAX) 491 return -EINVAL; 492 493 kbuf = memdup_user(ubuf, len); 494 if (IS_ERR(kbuf)) 495 return PTR_ERR(kbuf); 496 497 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 498 if (!error) 499 xfs_forget_acl(inode, name, flags); 500 kfree(kbuf); 501 return error; 502 } 503 504 int 505 xfs_attrmulti_attr_remove( 506 struct inode *inode, 507 unsigned char *name, 508 __uint32_t flags) 509 { 510 int error; 511 512 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 513 return -EPERM; 514 error = xfs_attr_remove(XFS_I(inode), name, flags); 515 if (!error) 516 xfs_forget_acl(inode, name, flags); 517 return error; 518 } 519 520 STATIC int 521 xfs_attrmulti_by_handle( 522 struct file *parfilp, 523 void __user *arg) 524 { 525 int error; 526 xfs_attr_multiop_t *ops; 527 xfs_fsop_attrmulti_handlereq_t am_hreq; 528 struct dentry *dentry; 529 unsigned int i, size; 530 unsigned char *attr_name; 531 532 if (!capable(CAP_SYS_ADMIN)) 533 return -EPERM; 534 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 535 return -EFAULT; 536 537 /* overflow check */ 538 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 539 return -E2BIG; 540 541 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 542 if (IS_ERR(dentry)) 543 return PTR_ERR(dentry); 544 545 error = -E2BIG; 546 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 547 if (!size || size > 16 * PAGE_SIZE) 548 goto out_dput; 549 550 ops = memdup_user(am_hreq.ops, size); 551 if (IS_ERR(ops)) { 552 error = PTR_ERR(ops); 553 goto out_dput; 554 } 555 556 error = -ENOMEM; 557 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 558 if (!attr_name) 559 goto out_kfree_ops; 560 561 error = 0; 562 for (i = 0; i < am_hreq.opcount; i++) { 563 ops[i].am_error = strncpy_from_user((char *)attr_name, 564 ops[i].am_attrname, MAXNAMELEN); 565 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 566 error = -ERANGE; 567 if (ops[i].am_error < 0) 568 break; 569 570 switch (ops[i].am_opcode) { 571 case ATTR_OP_GET: 572 ops[i].am_error = xfs_attrmulti_attr_get( 573 d_inode(dentry), attr_name, 574 ops[i].am_attrvalue, &ops[i].am_length, 575 ops[i].am_flags); 576 break; 577 case ATTR_OP_SET: 578 ops[i].am_error = mnt_want_write_file(parfilp); 579 if (ops[i].am_error) 580 break; 581 ops[i].am_error = xfs_attrmulti_attr_set( 582 d_inode(dentry), attr_name, 583 ops[i].am_attrvalue, ops[i].am_length, 584 ops[i].am_flags); 585 mnt_drop_write_file(parfilp); 586 break; 587 case ATTR_OP_REMOVE: 588 ops[i].am_error = mnt_want_write_file(parfilp); 589 if (ops[i].am_error) 590 break; 591 ops[i].am_error = xfs_attrmulti_attr_remove( 592 d_inode(dentry), attr_name, 593 ops[i].am_flags); 594 mnt_drop_write_file(parfilp); 595 break; 596 default: 597 ops[i].am_error = -EINVAL; 598 } 599 } 600 601 if (copy_to_user(am_hreq.ops, ops, size)) 602 error = -EFAULT; 603 604 kfree(attr_name); 605 out_kfree_ops: 606 kfree(ops); 607 out_dput: 608 dput(dentry); 609 return error; 610 } 611 612 int 613 xfs_ioc_space( 614 struct xfs_inode *ip, 615 struct inode *inode, 616 struct file *filp, 617 int ioflags, 618 unsigned int cmd, 619 xfs_flock64_t *bf) 620 { 621 struct iattr iattr; 622 enum xfs_prealloc_flags flags = 0; 623 uint iolock = XFS_IOLOCK_EXCL; 624 int error; 625 626 /* 627 * Only allow the sys admin to reserve space unless 628 * unwritten extents are enabled. 629 */ 630 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && 631 !capable(CAP_SYS_ADMIN)) 632 return -EPERM; 633 634 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 635 return -EPERM; 636 637 if (!(filp->f_mode & FMODE_WRITE)) 638 return -EBADF; 639 640 if (!S_ISREG(inode->i_mode)) 641 return -EINVAL; 642 643 if (filp->f_flags & O_DSYNC) 644 flags |= XFS_PREALLOC_SYNC; 645 if (ioflags & XFS_IO_INVIS) 646 flags |= XFS_PREALLOC_INVISIBLE; 647 648 error = mnt_want_write_file(filp); 649 if (error) 650 return error; 651 652 xfs_ilock(ip, iolock); 653 error = xfs_break_layouts(inode, &iolock, false); 654 if (error) 655 goto out_unlock; 656 657 xfs_ilock(ip, XFS_MMAPLOCK_EXCL); 658 iolock |= XFS_MMAPLOCK_EXCL; 659 660 switch (bf->l_whence) { 661 case 0: /*SEEK_SET*/ 662 break; 663 case 1: /*SEEK_CUR*/ 664 bf->l_start += filp->f_pos; 665 break; 666 case 2: /*SEEK_END*/ 667 bf->l_start += XFS_ISIZE(ip); 668 break; 669 default: 670 error = -EINVAL; 671 goto out_unlock; 672 } 673 674 /* 675 * length of <= 0 for resv/unresv/zero is invalid. length for 676 * alloc/free is ignored completely and we have no idea what userspace 677 * might have set it to, so set it to zero to allow range 678 * checks to pass. 679 */ 680 switch (cmd) { 681 case XFS_IOC_ZERO_RANGE: 682 case XFS_IOC_RESVSP: 683 case XFS_IOC_RESVSP64: 684 case XFS_IOC_UNRESVSP: 685 case XFS_IOC_UNRESVSP64: 686 if (bf->l_len <= 0) { 687 error = -EINVAL; 688 goto out_unlock; 689 } 690 break; 691 default: 692 bf->l_len = 0; 693 break; 694 } 695 696 if (bf->l_start < 0 || 697 bf->l_start > inode->i_sb->s_maxbytes || 698 bf->l_start + bf->l_len < 0 || 699 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) { 700 error = -EINVAL; 701 goto out_unlock; 702 } 703 704 switch (cmd) { 705 case XFS_IOC_ZERO_RANGE: 706 flags |= XFS_PREALLOC_SET; 707 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); 708 break; 709 case XFS_IOC_RESVSP: 710 case XFS_IOC_RESVSP64: 711 flags |= XFS_PREALLOC_SET; 712 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, 713 XFS_BMAPI_PREALLOC); 714 break; 715 case XFS_IOC_UNRESVSP: 716 case XFS_IOC_UNRESVSP64: 717 error = xfs_free_file_space(ip, bf->l_start, bf->l_len); 718 break; 719 case XFS_IOC_ALLOCSP: 720 case XFS_IOC_ALLOCSP64: 721 case XFS_IOC_FREESP: 722 case XFS_IOC_FREESP64: 723 flags |= XFS_PREALLOC_CLEAR; 724 if (bf->l_start > XFS_ISIZE(ip)) { 725 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 726 bf->l_start - XFS_ISIZE(ip), 0); 727 if (error) 728 goto out_unlock; 729 } 730 731 iattr.ia_valid = ATTR_SIZE; 732 iattr.ia_size = bf->l_start; 733 734 error = xfs_setattr_size(ip, &iattr); 735 break; 736 default: 737 ASSERT(0); 738 error = -EINVAL; 739 } 740 741 if (error) 742 goto out_unlock; 743 744 error = xfs_update_prealloc_flags(ip, flags); 745 746 out_unlock: 747 xfs_iunlock(ip, iolock); 748 mnt_drop_write_file(filp); 749 return error; 750 } 751 752 STATIC int 753 xfs_ioc_bulkstat( 754 xfs_mount_t *mp, 755 unsigned int cmd, 756 void __user *arg) 757 { 758 xfs_fsop_bulkreq_t bulkreq; 759 int count; /* # of records returned */ 760 xfs_ino_t inlast; /* last inode number */ 761 int done; 762 int error; 763 764 /* done = 1 if there are more stats to get and if bulkstat */ 765 /* should be called again (unused here, but used in dmapi) */ 766 767 if (!capable(CAP_SYS_ADMIN)) 768 return -EPERM; 769 770 if (XFS_FORCED_SHUTDOWN(mp)) 771 return -EIO; 772 773 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) 774 return -EFAULT; 775 776 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) 777 return -EFAULT; 778 779 if ((count = bulkreq.icount) <= 0) 780 return -EINVAL; 781 782 if (bulkreq.ubuffer == NULL) 783 return -EINVAL; 784 785 if (cmd == XFS_IOC_FSINUMBERS) 786 error = xfs_inumbers(mp, &inlast, &count, 787 bulkreq.ubuffer, xfs_inumbers_fmt); 788 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) 789 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer, 790 sizeof(xfs_bstat_t), NULL, &done); 791 else /* XFS_IOC_FSBULKSTAT */ 792 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, 793 sizeof(xfs_bstat_t), bulkreq.ubuffer, 794 &done); 795 796 if (error) 797 return error; 798 799 if (bulkreq.ocount != NULL) { 800 if (copy_to_user(bulkreq.lastip, &inlast, 801 sizeof(xfs_ino_t))) 802 return -EFAULT; 803 804 if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) 805 return -EFAULT; 806 } 807 808 return 0; 809 } 810 811 STATIC int 812 xfs_ioc_fsgeometry_v1( 813 xfs_mount_t *mp, 814 void __user *arg) 815 { 816 xfs_fsop_geom_t fsgeo; 817 int error; 818 819 error = xfs_fs_geometry(mp, &fsgeo, 3); 820 if (error) 821 return error; 822 823 /* 824 * Caller should have passed an argument of type 825 * xfs_fsop_geom_v1_t. This is a proper subset of the 826 * xfs_fsop_geom_t that xfs_fs_geometry() fills in. 827 */ 828 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) 829 return -EFAULT; 830 return 0; 831 } 832 833 STATIC int 834 xfs_ioc_fsgeometry( 835 xfs_mount_t *mp, 836 void __user *arg) 837 { 838 xfs_fsop_geom_t fsgeo; 839 int error; 840 841 error = xfs_fs_geometry(mp, &fsgeo, 4); 842 if (error) 843 return error; 844 845 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) 846 return -EFAULT; 847 return 0; 848 } 849 850 /* 851 * Linux extended inode flags interface. 852 */ 853 854 STATIC unsigned int 855 xfs_merge_ioc_xflags( 856 unsigned int flags, 857 unsigned int start) 858 { 859 unsigned int xflags = start; 860 861 if (flags & FS_IMMUTABLE_FL) 862 xflags |= XFS_XFLAG_IMMUTABLE; 863 else 864 xflags &= ~XFS_XFLAG_IMMUTABLE; 865 if (flags & FS_APPEND_FL) 866 xflags |= XFS_XFLAG_APPEND; 867 else 868 xflags &= ~XFS_XFLAG_APPEND; 869 if (flags & FS_SYNC_FL) 870 xflags |= XFS_XFLAG_SYNC; 871 else 872 xflags &= ~XFS_XFLAG_SYNC; 873 if (flags & FS_NOATIME_FL) 874 xflags |= XFS_XFLAG_NOATIME; 875 else 876 xflags &= ~XFS_XFLAG_NOATIME; 877 if (flags & FS_NODUMP_FL) 878 xflags |= XFS_XFLAG_NODUMP; 879 else 880 xflags &= ~XFS_XFLAG_NODUMP; 881 882 return xflags; 883 } 884 885 STATIC unsigned int 886 xfs_di2lxflags( 887 __uint16_t di_flags) 888 { 889 unsigned int flags = 0; 890 891 if (di_flags & XFS_DIFLAG_IMMUTABLE) 892 flags |= FS_IMMUTABLE_FL; 893 if (di_flags & XFS_DIFLAG_APPEND) 894 flags |= FS_APPEND_FL; 895 if (di_flags & XFS_DIFLAG_SYNC) 896 flags |= FS_SYNC_FL; 897 if (di_flags & XFS_DIFLAG_NOATIME) 898 flags |= FS_NOATIME_FL; 899 if (di_flags & XFS_DIFLAG_NODUMP) 900 flags |= FS_NODUMP_FL; 901 return flags; 902 } 903 904 STATIC int 905 xfs_ioc_fsgetxattr( 906 xfs_inode_t *ip, 907 int attr, 908 void __user *arg) 909 { 910 struct fsxattr fa; 911 912 memset(&fa, 0, sizeof(struct fsxattr)); 913 914 xfs_ilock(ip, XFS_ILOCK_SHARED); 915 fa.fsx_xflags = xfs_ip2xflags(ip); 916 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 917 fa.fsx_projid = xfs_get_projid(ip); 918 919 if (attr) { 920 if (ip->i_afp) { 921 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 922 fa.fsx_nextents = ip->i_afp->if_bytes / 923 sizeof(xfs_bmbt_rec_t); 924 else 925 fa.fsx_nextents = ip->i_d.di_anextents; 926 } else 927 fa.fsx_nextents = 0; 928 } else { 929 if (ip->i_df.if_flags & XFS_IFEXTENTS) 930 fa.fsx_nextents = ip->i_df.if_bytes / 931 sizeof(xfs_bmbt_rec_t); 932 else 933 fa.fsx_nextents = ip->i_d.di_nextents; 934 } 935 xfs_iunlock(ip, XFS_ILOCK_SHARED); 936 937 if (copy_to_user(arg, &fa, sizeof(fa))) 938 return -EFAULT; 939 return 0; 940 } 941 942 STATIC void 943 xfs_set_diflags( 944 struct xfs_inode *ip, 945 unsigned int xflags) 946 { 947 unsigned int di_flags; 948 949 /* can't set PREALLOC this way, just preserve it */ 950 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 951 if (xflags & XFS_XFLAG_IMMUTABLE) 952 di_flags |= XFS_DIFLAG_IMMUTABLE; 953 if (xflags & XFS_XFLAG_APPEND) 954 di_flags |= XFS_DIFLAG_APPEND; 955 if (xflags & XFS_XFLAG_SYNC) 956 di_flags |= XFS_DIFLAG_SYNC; 957 if (xflags & XFS_XFLAG_NOATIME) 958 di_flags |= XFS_DIFLAG_NOATIME; 959 if (xflags & XFS_XFLAG_NODUMP) 960 di_flags |= XFS_DIFLAG_NODUMP; 961 if (xflags & XFS_XFLAG_NODEFRAG) 962 di_flags |= XFS_DIFLAG_NODEFRAG; 963 if (xflags & XFS_XFLAG_FILESTREAM) 964 di_flags |= XFS_DIFLAG_FILESTREAM; 965 if (S_ISDIR(ip->i_d.di_mode)) { 966 if (xflags & XFS_XFLAG_RTINHERIT) 967 di_flags |= XFS_DIFLAG_RTINHERIT; 968 if (xflags & XFS_XFLAG_NOSYMLINKS) 969 di_flags |= XFS_DIFLAG_NOSYMLINKS; 970 if (xflags & XFS_XFLAG_EXTSZINHERIT) 971 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 972 if (xflags & XFS_XFLAG_PROJINHERIT) 973 di_flags |= XFS_DIFLAG_PROJINHERIT; 974 } else if (S_ISREG(ip->i_d.di_mode)) { 975 if (xflags & XFS_XFLAG_REALTIME) 976 di_flags |= XFS_DIFLAG_REALTIME; 977 if (xflags & XFS_XFLAG_EXTSIZE) 978 di_flags |= XFS_DIFLAG_EXTSIZE; 979 } 980 981 ip->i_d.di_flags = di_flags; 982 } 983 984 STATIC void 985 xfs_diflags_to_linux( 986 struct xfs_inode *ip) 987 { 988 struct inode *inode = VFS_I(ip); 989 unsigned int xflags = xfs_ip2xflags(ip); 990 991 if (xflags & XFS_XFLAG_IMMUTABLE) 992 inode->i_flags |= S_IMMUTABLE; 993 else 994 inode->i_flags &= ~S_IMMUTABLE; 995 if (xflags & XFS_XFLAG_APPEND) 996 inode->i_flags |= S_APPEND; 997 else 998 inode->i_flags &= ~S_APPEND; 999 if (xflags & XFS_XFLAG_SYNC) 1000 inode->i_flags |= S_SYNC; 1001 else 1002 inode->i_flags &= ~S_SYNC; 1003 if (xflags & XFS_XFLAG_NOATIME) 1004 inode->i_flags |= S_NOATIME; 1005 else 1006 inode->i_flags &= ~S_NOATIME; 1007 } 1008 1009 static int 1010 xfs_ioctl_setattr_xflags( 1011 struct xfs_trans *tp, 1012 struct xfs_inode *ip, 1013 struct fsxattr *fa) 1014 { 1015 struct xfs_mount *mp = ip->i_mount; 1016 1017 /* Can't change realtime flag if any extents are allocated. */ 1018 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1019 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & XFS_XFLAG_REALTIME)) 1020 return -EINVAL; 1021 1022 /* If realtime flag is set then must have realtime device */ 1023 if (fa->fsx_xflags & XFS_XFLAG_REALTIME) { 1024 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1025 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1026 return -EINVAL; 1027 } 1028 1029 /* 1030 * Can't modify an immutable/append-only file unless 1031 * we have appropriate permission. 1032 */ 1033 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) || 1034 (fa->fsx_xflags & (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && 1035 !capable(CAP_LINUX_IMMUTABLE)) 1036 return -EPERM; 1037 1038 xfs_set_diflags(ip, fa->fsx_xflags); 1039 xfs_diflags_to_linux(ip); 1040 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1041 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1042 XFS_STATS_INC(mp, xs_ig_attrchg); 1043 return 0; 1044 } 1045 1046 /* 1047 * Set up the transaction structure for the setattr operation, checking that we 1048 * have permission to do so. On success, return a clean transaction and the 1049 * inode locked exclusively ready for further operation specific checks. On 1050 * failure, return an error without modifying or locking the inode. 1051 */ 1052 static struct xfs_trans * 1053 xfs_ioctl_setattr_get_trans( 1054 struct xfs_inode *ip) 1055 { 1056 struct xfs_mount *mp = ip->i_mount; 1057 struct xfs_trans *tp; 1058 int error; 1059 1060 if (mp->m_flags & XFS_MOUNT_RDONLY) 1061 return ERR_PTR(-EROFS); 1062 if (XFS_FORCED_SHUTDOWN(mp)) 1063 return ERR_PTR(-EIO); 1064 1065 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); 1066 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); 1067 if (error) 1068 goto out_cancel; 1069 1070 xfs_ilock(ip, XFS_ILOCK_EXCL); 1071 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 1072 1073 /* 1074 * CAP_FOWNER overrides the following restrictions: 1075 * 1076 * The user ID of the calling process must be equal to the file owner 1077 * ID, except in cases where the CAP_FSETID capability is applicable. 1078 */ 1079 if (!inode_owner_or_capable(VFS_I(ip))) { 1080 error = -EPERM; 1081 goto out_cancel; 1082 } 1083 1084 if (mp->m_flags & XFS_MOUNT_WSYNC) 1085 xfs_trans_set_sync(tp); 1086 1087 return tp; 1088 1089 out_cancel: 1090 xfs_trans_cancel(tp); 1091 return ERR_PTR(error); 1092 } 1093 1094 /* 1095 * extent size hint validation is somewhat cumbersome. Rules are: 1096 * 1097 * 1. extent size hint is only valid for directories and regular files 1098 * 2. XFS_XFLAG_EXTSIZE is only valid for regular files 1099 * 3. XFS_XFLAG_EXTSZINHERIT is only valid for directories. 1100 * 4. can only be changed on regular files if no extents are allocated 1101 * 5. can be changed on directories at any time 1102 * 6. extsize hint of 0 turns off hints, clears inode flags. 1103 * 7. Extent size must be a multiple of the appropriate block size. 1104 * 8. for non-realtime files, the extent size hint must be limited 1105 * to half the AG size to avoid alignment extending the extent beyond the 1106 * limits of the AG. 1107 */ 1108 static int 1109 xfs_ioctl_setattr_check_extsize( 1110 struct xfs_inode *ip, 1111 struct fsxattr *fa) 1112 { 1113 struct xfs_mount *mp = ip->i_mount; 1114 1115 if ((fa->fsx_xflags & XFS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode)) 1116 return -EINVAL; 1117 1118 if ((fa->fsx_xflags & XFS_XFLAG_EXTSZINHERIT) && 1119 !S_ISDIR(ip->i_d.di_mode)) 1120 return -EINVAL; 1121 1122 if (S_ISREG(ip->i_d.di_mode) && ip->i_d.di_nextents && 1123 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1124 return -EINVAL; 1125 1126 if (fa->fsx_extsize != 0) { 1127 xfs_extlen_t size; 1128 xfs_fsblock_t extsize_fsb; 1129 1130 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1131 if (extsize_fsb > MAXEXTLEN) 1132 return -EINVAL; 1133 1134 if (XFS_IS_REALTIME_INODE(ip) || 1135 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1136 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1137 } else { 1138 size = mp->m_sb.sb_blocksize; 1139 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1140 return -EINVAL; 1141 } 1142 1143 if (fa->fsx_extsize % size) 1144 return -EINVAL; 1145 } else 1146 fa->fsx_xflags &= ~(XFS_XFLAG_EXTSIZE | XFS_XFLAG_EXTSZINHERIT); 1147 1148 return 0; 1149 } 1150 1151 static int 1152 xfs_ioctl_setattr_check_projid( 1153 struct xfs_inode *ip, 1154 struct fsxattr *fa) 1155 { 1156 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1157 if (fa->fsx_projid > (__uint16_t)-1 && 1158 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1159 return -EINVAL; 1160 1161 /* 1162 * Project Quota ID state is only allowed to change from within the init 1163 * namespace. Enforce that restriction only if we are trying to change 1164 * the quota ID state. Everything else is allowed in user namespaces. 1165 */ 1166 if (current_user_ns() == &init_user_ns) 1167 return 0; 1168 1169 if (xfs_get_projid(ip) != fa->fsx_projid) 1170 return -EINVAL; 1171 if ((fa->fsx_xflags & XFS_XFLAG_PROJINHERIT) != 1172 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)) 1173 return -EINVAL; 1174 1175 return 0; 1176 } 1177 1178 STATIC int 1179 xfs_ioctl_setattr( 1180 xfs_inode_t *ip, 1181 struct fsxattr *fa) 1182 { 1183 struct xfs_mount *mp = ip->i_mount; 1184 struct xfs_trans *tp; 1185 struct xfs_dquot *udqp = NULL; 1186 struct xfs_dquot *pdqp = NULL; 1187 struct xfs_dquot *olddquot = NULL; 1188 int code; 1189 1190 trace_xfs_ioctl_setattr(ip); 1191 1192 code = xfs_ioctl_setattr_check_projid(ip, fa); 1193 if (code) 1194 return code; 1195 1196 /* 1197 * If disk quotas is on, we make sure that the dquots do exist on disk, 1198 * before we start any other transactions. Trying to do this later 1199 * is messy. We don't care to take a readlock to look at the ids 1200 * in inode here, because we can't hold it across the trans_reserve. 1201 * If the IDs do change before we take the ilock, we're covered 1202 * because the i_*dquot fields will get updated anyway. 1203 */ 1204 if (XFS_IS_QUOTA_ON(mp)) { 1205 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1206 ip->i_d.di_gid, fa->fsx_projid, 1207 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1208 if (code) 1209 return code; 1210 } 1211 1212 tp = xfs_ioctl_setattr_get_trans(ip); 1213 if (IS_ERR(tp)) { 1214 code = PTR_ERR(tp); 1215 goto error_free_dquots; 1216 } 1217 1218 1219 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1220 xfs_get_projid(ip) != fa->fsx_projid) { 1221 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1222 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1223 if (code) /* out of quota */ 1224 goto error_trans_cancel; 1225 } 1226 1227 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1228 if (code) 1229 goto error_trans_cancel; 1230 1231 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1232 if (code) 1233 goto error_trans_cancel; 1234 1235 /* 1236 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1237 * overrides the following restrictions: 1238 * 1239 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1240 * successful return from chown() 1241 */ 1242 1243 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && 1244 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1245 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); 1246 1247 /* Change the ownerships and register project quota modifications */ 1248 if (xfs_get_projid(ip) != fa->fsx_projid) { 1249 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1250 olddquot = xfs_qm_vop_chown(tp, ip, 1251 &ip->i_pdquot, pdqp); 1252 } 1253 ASSERT(ip->i_d.di_version > 1); 1254 xfs_set_projid(ip, fa->fsx_projid); 1255 } 1256 1257 /* 1258 * Only set the extent size hint if we've already determined that the 1259 * extent size hint should be set on the inode. If no extent size flags 1260 * are set on the inode then unconditionally clear the extent size hint. 1261 */ 1262 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1263 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1264 else 1265 ip->i_d.di_extsize = 0; 1266 1267 code = xfs_trans_commit(tp); 1268 1269 /* 1270 * Release any dquot(s) the inode had kept before chown. 1271 */ 1272 xfs_qm_dqrele(olddquot); 1273 xfs_qm_dqrele(udqp); 1274 xfs_qm_dqrele(pdqp); 1275 1276 return code; 1277 1278 error_trans_cancel: 1279 xfs_trans_cancel(tp); 1280 error_free_dquots: 1281 xfs_qm_dqrele(udqp); 1282 xfs_qm_dqrele(pdqp); 1283 return code; 1284 } 1285 1286 STATIC int 1287 xfs_ioc_fssetxattr( 1288 xfs_inode_t *ip, 1289 struct file *filp, 1290 void __user *arg) 1291 { 1292 struct fsxattr fa; 1293 int error; 1294 1295 if (copy_from_user(&fa, arg, sizeof(fa))) 1296 return -EFAULT; 1297 1298 error = mnt_want_write_file(filp); 1299 if (error) 1300 return error; 1301 error = xfs_ioctl_setattr(ip, &fa); 1302 mnt_drop_write_file(filp); 1303 return error; 1304 } 1305 1306 STATIC int 1307 xfs_ioc_getxflags( 1308 xfs_inode_t *ip, 1309 void __user *arg) 1310 { 1311 unsigned int flags; 1312 1313 flags = xfs_di2lxflags(ip->i_d.di_flags); 1314 if (copy_to_user(arg, &flags, sizeof(flags))) 1315 return -EFAULT; 1316 return 0; 1317 } 1318 1319 STATIC int 1320 xfs_ioc_setxflags( 1321 struct xfs_inode *ip, 1322 struct file *filp, 1323 void __user *arg) 1324 { 1325 struct xfs_trans *tp; 1326 struct fsxattr fa; 1327 unsigned int flags; 1328 int error; 1329 1330 if (copy_from_user(&flags, arg, sizeof(flags))) 1331 return -EFAULT; 1332 1333 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1334 FS_NOATIME_FL | FS_NODUMP_FL | \ 1335 FS_SYNC_FL)) 1336 return -EOPNOTSUPP; 1337 1338 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1339 1340 error = mnt_want_write_file(filp); 1341 if (error) 1342 return error; 1343 1344 tp = xfs_ioctl_setattr_get_trans(ip); 1345 if (IS_ERR(tp)) { 1346 error = PTR_ERR(tp); 1347 goto out_drop_write; 1348 } 1349 1350 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1351 if (error) { 1352 xfs_trans_cancel(tp); 1353 goto out_drop_write; 1354 } 1355 1356 error = xfs_trans_commit(tp); 1357 out_drop_write: 1358 mnt_drop_write_file(filp); 1359 return error; 1360 } 1361 1362 STATIC int 1363 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) 1364 { 1365 struct getbmap __user *base = (struct getbmap __user *)*ap; 1366 1367 /* copy only getbmap portion (not getbmapx) */ 1368 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1369 return -EFAULT; 1370 1371 *ap += sizeof(struct getbmap); 1372 return 0; 1373 } 1374 1375 STATIC int 1376 xfs_ioc_getbmap( 1377 struct xfs_inode *ip, 1378 int ioflags, 1379 unsigned int cmd, 1380 void __user *arg) 1381 { 1382 struct getbmapx bmx; 1383 int error; 1384 1385 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) 1386 return -EFAULT; 1387 1388 if (bmx.bmv_count < 2) 1389 return -EINVAL; 1390 1391 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1392 if (ioflags & XFS_IO_INVIS) 1393 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1394 1395 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, 1396 (__force struct getbmap *)arg+1); 1397 if (error) 1398 return error; 1399 1400 /* copy back header - only size of getbmap */ 1401 if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) 1402 return -EFAULT; 1403 return 0; 1404 } 1405 1406 STATIC int 1407 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) 1408 { 1409 struct getbmapx __user *base = (struct getbmapx __user *)*ap; 1410 1411 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1412 return -EFAULT; 1413 1414 *ap += sizeof(struct getbmapx); 1415 return 0; 1416 } 1417 1418 STATIC int 1419 xfs_ioc_getbmapx( 1420 struct xfs_inode *ip, 1421 void __user *arg) 1422 { 1423 struct getbmapx bmx; 1424 int error; 1425 1426 if (copy_from_user(&bmx, arg, sizeof(bmx))) 1427 return -EFAULT; 1428 1429 if (bmx.bmv_count < 2) 1430 return -EINVAL; 1431 1432 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1433 return -EINVAL; 1434 1435 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1436 (__force struct getbmapx *)arg+1); 1437 if (error) 1438 return error; 1439 1440 /* copy back header */ 1441 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) 1442 return -EFAULT; 1443 1444 return 0; 1445 } 1446 1447 int 1448 xfs_ioc_swapext( 1449 xfs_swapext_t *sxp) 1450 { 1451 xfs_inode_t *ip, *tip; 1452 struct fd f, tmp; 1453 int error = 0; 1454 1455 /* Pull information for the target fd */ 1456 f = fdget((int)sxp->sx_fdtarget); 1457 if (!f.file) { 1458 error = -EINVAL; 1459 goto out; 1460 } 1461 1462 if (!(f.file->f_mode & FMODE_WRITE) || 1463 !(f.file->f_mode & FMODE_READ) || 1464 (f.file->f_flags & O_APPEND)) { 1465 error = -EBADF; 1466 goto out_put_file; 1467 } 1468 1469 tmp = fdget((int)sxp->sx_fdtmp); 1470 if (!tmp.file) { 1471 error = -EINVAL; 1472 goto out_put_file; 1473 } 1474 1475 if (!(tmp.file->f_mode & FMODE_WRITE) || 1476 !(tmp.file->f_mode & FMODE_READ) || 1477 (tmp.file->f_flags & O_APPEND)) { 1478 error = -EBADF; 1479 goto out_put_tmp_file; 1480 } 1481 1482 if (IS_SWAPFILE(file_inode(f.file)) || 1483 IS_SWAPFILE(file_inode(tmp.file))) { 1484 error = -EINVAL; 1485 goto out_put_tmp_file; 1486 } 1487 1488 ip = XFS_I(file_inode(f.file)); 1489 tip = XFS_I(file_inode(tmp.file)); 1490 1491 if (ip->i_mount != tip->i_mount) { 1492 error = -EINVAL; 1493 goto out_put_tmp_file; 1494 } 1495 1496 if (ip->i_ino == tip->i_ino) { 1497 error = -EINVAL; 1498 goto out_put_tmp_file; 1499 } 1500 1501 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1502 error = -EIO; 1503 goto out_put_tmp_file; 1504 } 1505 1506 error = xfs_swap_extents(ip, tip, sxp); 1507 1508 out_put_tmp_file: 1509 fdput(tmp); 1510 out_put_file: 1511 fdput(f); 1512 out: 1513 return error; 1514 } 1515 1516 /* 1517 * Note: some of the ioctl's return positive numbers as a 1518 * byte count indicating success, such as readlink_by_handle. 1519 * So we don't "sign flip" like most other routines. This means 1520 * true errors need to be returned as a negative value. 1521 */ 1522 long 1523 xfs_file_ioctl( 1524 struct file *filp, 1525 unsigned int cmd, 1526 unsigned long p) 1527 { 1528 struct inode *inode = file_inode(filp); 1529 struct xfs_inode *ip = XFS_I(inode); 1530 struct xfs_mount *mp = ip->i_mount; 1531 void __user *arg = (void __user *)p; 1532 int ioflags = 0; 1533 int error; 1534 1535 if (filp->f_mode & FMODE_NOCMTIME) 1536 ioflags |= XFS_IO_INVIS; 1537 1538 trace_xfs_file_ioctl(ip); 1539 1540 switch (cmd) { 1541 case FITRIM: 1542 return xfs_ioc_trim(mp, arg); 1543 case XFS_IOC_ALLOCSP: 1544 case XFS_IOC_FREESP: 1545 case XFS_IOC_RESVSP: 1546 case XFS_IOC_UNRESVSP: 1547 case XFS_IOC_ALLOCSP64: 1548 case XFS_IOC_FREESP64: 1549 case XFS_IOC_RESVSP64: 1550 case XFS_IOC_UNRESVSP64: 1551 case XFS_IOC_ZERO_RANGE: { 1552 xfs_flock64_t bf; 1553 1554 if (copy_from_user(&bf, arg, sizeof(bf))) 1555 return -EFAULT; 1556 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf); 1557 } 1558 case XFS_IOC_DIOINFO: { 1559 struct dioattr da; 1560 xfs_buftarg_t *target = 1561 XFS_IS_REALTIME_INODE(ip) ? 1562 mp->m_rtdev_targp : mp->m_ddev_targp; 1563 1564 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1565 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1566 1567 if (copy_to_user(arg, &da, sizeof(da))) 1568 return -EFAULT; 1569 return 0; 1570 } 1571 1572 case XFS_IOC_FSBULKSTAT_SINGLE: 1573 case XFS_IOC_FSBULKSTAT: 1574 case XFS_IOC_FSINUMBERS: 1575 return xfs_ioc_bulkstat(mp, cmd, arg); 1576 1577 case XFS_IOC_FSGEOMETRY_V1: 1578 return xfs_ioc_fsgeometry_v1(mp, arg); 1579 1580 case XFS_IOC_FSGEOMETRY: 1581 return xfs_ioc_fsgeometry(mp, arg); 1582 1583 case XFS_IOC_GETVERSION: 1584 return put_user(inode->i_generation, (int __user *)arg); 1585 1586 case XFS_IOC_FSGETXATTR: 1587 return xfs_ioc_fsgetxattr(ip, 0, arg); 1588 case XFS_IOC_FSGETXATTRA: 1589 return xfs_ioc_fsgetxattr(ip, 1, arg); 1590 case XFS_IOC_FSSETXATTR: 1591 return xfs_ioc_fssetxattr(ip, filp, arg); 1592 case XFS_IOC_GETXFLAGS: 1593 return xfs_ioc_getxflags(ip, arg); 1594 case XFS_IOC_SETXFLAGS: 1595 return xfs_ioc_setxflags(ip, filp, arg); 1596 1597 case XFS_IOC_FSSETDM: { 1598 struct fsdmidata dmi; 1599 1600 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1601 return -EFAULT; 1602 1603 error = mnt_want_write_file(filp); 1604 if (error) 1605 return error; 1606 1607 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1608 dmi.fsd_dmstate); 1609 mnt_drop_write_file(filp); 1610 return error; 1611 } 1612 1613 case XFS_IOC_GETBMAP: 1614 case XFS_IOC_GETBMAPA: 1615 return xfs_ioc_getbmap(ip, ioflags, cmd, arg); 1616 1617 case XFS_IOC_GETBMAPX: 1618 return xfs_ioc_getbmapx(ip, arg); 1619 1620 case XFS_IOC_FD_TO_HANDLE: 1621 case XFS_IOC_PATH_TO_HANDLE: 1622 case XFS_IOC_PATH_TO_FSHANDLE: { 1623 xfs_fsop_handlereq_t hreq; 1624 1625 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1626 return -EFAULT; 1627 return xfs_find_handle(cmd, &hreq); 1628 } 1629 case XFS_IOC_OPEN_BY_HANDLE: { 1630 xfs_fsop_handlereq_t hreq; 1631 1632 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1633 return -EFAULT; 1634 return xfs_open_by_handle(filp, &hreq); 1635 } 1636 case XFS_IOC_FSSETDM_BY_HANDLE: 1637 return xfs_fssetdm_by_handle(filp, arg); 1638 1639 case XFS_IOC_READLINK_BY_HANDLE: { 1640 xfs_fsop_handlereq_t hreq; 1641 1642 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1643 return -EFAULT; 1644 return xfs_readlink_by_handle(filp, &hreq); 1645 } 1646 case XFS_IOC_ATTRLIST_BY_HANDLE: 1647 return xfs_attrlist_by_handle(filp, arg); 1648 1649 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1650 return xfs_attrmulti_by_handle(filp, arg); 1651 1652 case XFS_IOC_SWAPEXT: { 1653 struct xfs_swapext sxp; 1654 1655 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1656 return -EFAULT; 1657 error = mnt_want_write_file(filp); 1658 if (error) 1659 return error; 1660 error = xfs_ioc_swapext(&sxp); 1661 mnt_drop_write_file(filp); 1662 return error; 1663 } 1664 1665 case XFS_IOC_FSCOUNTS: { 1666 xfs_fsop_counts_t out; 1667 1668 error = xfs_fs_counts(mp, &out); 1669 if (error) 1670 return error; 1671 1672 if (copy_to_user(arg, &out, sizeof(out))) 1673 return -EFAULT; 1674 return 0; 1675 } 1676 1677 case XFS_IOC_SET_RESBLKS: { 1678 xfs_fsop_resblks_t inout; 1679 __uint64_t in; 1680 1681 if (!capable(CAP_SYS_ADMIN)) 1682 return -EPERM; 1683 1684 if (mp->m_flags & XFS_MOUNT_RDONLY) 1685 return -EROFS; 1686 1687 if (copy_from_user(&inout, arg, sizeof(inout))) 1688 return -EFAULT; 1689 1690 error = mnt_want_write_file(filp); 1691 if (error) 1692 return error; 1693 1694 /* input parameter is passed in resblks field of structure */ 1695 in = inout.resblks; 1696 error = xfs_reserve_blocks(mp, &in, &inout); 1697 mnt_drop_write_file(filp); 1698 if (error) 1699 return error; 1700 1701 if (copy_to_user(arg, &inout, sizeof(inout))) 1702 return -EFAULT; 1703 return 0; 1704 } 1705 1706 case XFS_IOC_GET_RESBLKS: { 1707 xfs_fsop_resblks_t out; 1708 1709 if (!capable(CAP_SYS_ADMIN)) 1710 return -EPERM; 1711 1712 error = xfs_reserve_blocks(mp, NULL, &out); 1713 if (error) 1714 return error; 1715 1716 if (copy_to_user(arg, &out, sizeof(out))) 1717 return -EFAULT; 1718 1719 return 0; 1720 } 1721 1722 case XFS_IOC_FSGROWFSDATA: { 1723 xfs_growfs_data_t in; 1724 1725 if (copy_from_user(&in, arg, sizeof(in))) 1726 return -EFAULT; 1727 1728 error = mnt_want_write_file(filp); 1729 if (error) 1730 return error; 1731 error = xfs_growfs_data(mp, &in); 1732 mnt_drop_write_file(filp); 1733 return error; 1734 } 1735 1736 case XFS_IOC_FSGROWFSLOG: { 1737 xfs_growfs_log_t in; 1738 1739 if (copy_from_user(&in, arg, sizeof(in))) 1740 return -EFAULT; 1741 1742 error = mnt_want_write_file(filp); 1743 if (error) 1744 return error; 1745 error = xfs_growfs_log(mp, &in); 1746 mnt_drop_write_file(filp); 1747 return error; 1748 } 1749 1750 case XFS_IOC_FSGROWFSRT: { 1751 xfs_growfs_rt_t in; 1752 1753 if (copy_from_user(&in, arg, sizeof(in))) 1754 return -EFAULT; 1755 1756 error = mnt_want_write_file(filp); 1757 if (error) 1758 return error; 1759 error = xfs_growfs_rt(mp, &in); 1760 mnt_drop_write_file(filp); 1761 return error; 1762 } 1763 1764 case XFS_IOC_GOINGDOWN: { 1765 __uint32_t in; 1766 1767 if (!capable(CAP_SYS_ADMIN)) 1768 return -EPERM; 1769 1770 if (get_user(in, (__uint32_t __user *)arg)) 1771 return -EFAULT; 1772 1773 return xfs_fs_goingdown(mp, in); 1774 } 1775 1776 case XFS_IOC_ERROR_INJECTION: { 1777 xfs_error_injection_t in; 1778 1779 if (!capable(CAP_SYS_ADMIN)) 1780 return -EPERM; 1781 1782 if (copy_from_user(&in, arg, sizeof(in))) 1783 return -EFAULT; 1784 1785 return xfs_errortag_add(in.errtag, mp); 1786 } 1787 1788 case XFS_IOC_ERROR_CLEARALL: 1789 if (!capable(CAP_SYS_ADMIN)) 1790 return -EPERM; 1791 1792 return xfs_errortag_clearall(mp, 1); 1793 1794 case XFS_IOC_FREE_EOFBLOCKS: { 1795 struct xfs_fs_eofblocks eofb; 1796 struct xfs_eofblocks keofb; 1797 1798 if (!capable(CAP_SYS_ADMIN)) 1799 return -EPERM; 1800 1801 if (mp->m_flags & XFS_MOUNT_RDONLY) 1802 return -EROFS; 1803 1804 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1805 return -EFAULT; 1806 1807 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 1808 if (error) 1809 return error; 1810 1811 return xfs_icache_free_eofblocks(mp, &keofb); 1812 } 1813 1814 default: 1815 return -ENOTTY; 1816 } 1817 } 1818