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_acl.h" 43 #include "xfs_btree.h" 44 #include <linux/fsmap.h> 45 #include "xfs_fsmap.h" 46 #include "scrub/xfs_scrub.h" 47 #include "xfs_sb.h" 48 49 #include <linux/capability.h> 50 #include <linux/cred.h> 51 #include <linux/dcache.h> 52 #include <linux/mount.h> 53 #include <linux/namei.h> 54 #include <linux/pagemap.h> 55 #include <linux/slab.h> 56 #include <linux/exportfs.h> 57 58 /* 59 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 60 * a file or fs handle. 61 * 62 * XFS_IOC_PATH_TO_FSHANDLE 63 * returns fs handle for a mount point or path within that mount point 64 * XFS_IOC_FD_TO_HANDLE 65 * returns full handle for a FD opened in user space 66 * XFS_IOC_PATH_TO_HANDLE 67 * returns full handle for a path 68 */ 69 int 70 xfs_find_handle( 71 unsigned int cmd, 72 xfs_fsop_handlereq_t *hreq) 73 { 74 int hsize; 75 xfs_handle_t handle; 76 struct inode *inode; 77 struct fd f = {NULL}; 78 struct path path; 79 int error; 80 struct xfs_inode *ip; 81 82 if (cmd == XFS_IOC_FD_TO_HANDLE) { 83 f = fdget(hreq->fd); 84 if (!f.file) 85 return -EBADF; 86 inode = file_inode(f.file); 87 } else { 88 error = user_lpath((const char __user *)hreq->path, &path); 89 if (error) 90 return error; 91 inode = d_inode(path.dentry); 92 } 93 ip = XFS_I(inode); 94 95 /* 96 * We can only generate handles for inodes residing on a XFS filesystem, 97 * and only for regular files, directories or symbolic links. 98 */ 99 error = -EINVAL; 100 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 101 goto out_put; 102 103 error = -EBADF; 104 if (!S_ISREG(inode->i_mode) && 105 !S_ISDIR(inode->i_mode) && 106 !S_ISLNK(inode->i_mode)) 107 goto out_put; 108 109 110 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 111 112 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 113 /* 114 * This handle only contains an fsid, zero the rest. 115 */ 116 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 117 hsize = sizeof(xfs_fsid_t); 118 } else { 119 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 120 sizeof(handle.ha_fid.fid_len); 121 handle.ha_fid.fid_pad = 0; 122 handle.ha_fid.fid_gen = inode->i_generation; 123 handle.ha_fid.fid_ino = ip->i_ino; 124 hsize = sizeof(xfs_handle_t); 125 } 126 127 error = -EFAULT; 128 if (copy_to_user(hreq->ohandle, &handle, hsize) || 129 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 130 goto out_put; 131 132 error = 0; 133 134 out_put: 135 if (cmd == XFS_IOC_FD_TO_HANDLE) 136 fdput(f); 137 else 138 path_put(&path); 139 return error; 140 } 141 142 /* 143 * No need to do permission checks on the various pathname components 144 * as the handle operations are privileged. 145 */ 146 STATIC int 147 xfs_handle_acceptable( 148 void *context, 149 struct dentry *dentry) 150 { 151 return 1; 152 } 153 154 /* 155 * Convert userspace handle data into a dentry. 156 */ 157 struct dentry * 158 xfs_handle_to_dentry( 159 struct file *parfilp, 160 void __user *uhandle, 161 u32 hlen) 162 { 163 xfs_handle_t handle; 164 struct xfs_fid64 fid; 165 166 /* 167 * Only allow handle opens under a directory. 168 */ 169 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 170 return ERR_PTR(-ENOTDIR); 171 172 if (hlen != sizeof(xfs_handle_t)) 173 return ERR_PTR(-EINVAL); 174 if (copy_from_user(&handle, uhandle, hlen)) 175 return ERR_PTR(-EFAULT); 176 if (handle.ha_fid.fid_len != 177 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 178 return ERR_PTR(-EINVAL); 179 180 memset(&fid, 0, sizeof(struct fid)); 181 fid.ino = handle.ha_fid.fid_ino; 182 fid.gen = handle.ha_fid.fid_gen; 183 184 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 185 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 186 xfs_handle_acceptable, NULL); 187 } 188 189 STATIC struct dentry * 190 xfs_handlereq_to_dentry( 191 struct file *parfilp, 192 xfs_fsop_handlereq_t *hreq) 193 { 194 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 195 } 196 197 int 198 xfs_open_by_handle( 199 struct file *parfilp, 200 xfs_fsop_handlereq_t *hreq) 201 { 202 const struct cred *cred = current_cred(); 203 int error; 204 int fd; 205 int permflag; 206 struct file *filp; 207 struct inode *inode; 208 struct dentry *dentry; 209 fmode_t fmode; 210 struct path path; 211 212 if (!capable(CAP_SYS_ADMIN)) 213 return -EPERM; 214 215 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 216 if (IS_ERR(dentry)) 217 return PTR_ERR(dentry); 218 inode = d_inode(dentry); 219 220 /* Restrict xfs_open_by_handle to directories & regular files. */ 221 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 222 error = -EPERM; 223 goto out_dput; 224 } 225 226 #if BITS_PER_LONG != 32 227 hreq->oflags |= O_LARGEFILE; 228 #endif 229 230 permflag = hreq->oflags; 231 fmode = OPEN_FMODE(permflag); 232 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 233 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 234 error = -EPERM; 235 goto out_dput; 236 } 237 238 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 239 error = -EPERM; 240 goto out_dput; 241 } 242 243 /* Can't write directories. */ 244 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 245 error = -EISDIR; 246 goto out_dput; 247 } 248 249 fd = get_unused_fd_flags(0); 250 if (fd < 0) { 251 error = fd; 252 goto out_dput; 253 } 254 255 path.mnt = parfilp->f_path.mnt; 256 path.dentry = dentry; 257 filp = dentry_open(&path, hreq->oflags, cred); 258 dput(dentry); 259 if (IS_ERR(filp)) { 260 put_unused_fd(fd); 261 return PTR_ERR(filp); 262 } 263 264 if (S_ISREG(inode->i_mode)) { 265 filp->f_flags |= O_NOATIME; 266 filp->f_mode |= FMODE_NOCMTIME; 267 } 268 269 fd_install(fd, filp); 270 return fd; 271 272 out_dput: 273 dput(dentry); 274 return error; 275 } 276 277 int 278 xfs_readlink_by_handle( 279 struct file *parfilp, 280 xfs_fsop_handlereq_t *hreq) 281 { 282 struct dentry *dentry; 283 __u32 olen; 284 int error; 285 286 if (!capable(CAP_SYS_ADMIN)) 287 return -EPERM; 288 289 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 290 if (IS_ERR(dentry)) 291 return PTR_ERR(dentry); 292 293 /* Restrict this handle operation to symlinks only. */ 294 if (!d_is_symlink(dentry)) { 295 error = -EINVAL; 296 goto out_dput; 297 } 298 299 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 300 error = -EFAULT; 301 goto out_dput; 302 } 303 304 error = vfs_readlink(dentry, hreq->ohandle, olen); 305 306 out_dput: 307 dput(dentry); 308 return error; 309 } 310 311 int 312 xfs_set_dmattrs( 313 xfs_inode_t *ip, 314 uint evmask, 315 uint16_t state) 316 { 317 xfs_mount_t *mp = ip->i_mount; 318 xfs_trans_t *tp; 319 int error; 320 321 if (!capable(CAP_SYS_ADMIN)) 322 return -EPERM; 323 324 if (XFS_FORCED_SHUTDOWN(mp)) 325 return -EIO; 326 327 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 328 if (error) 329 return error; 330 331 xfs_ilock(ip, XFS_ILOCK_EXCL); 332 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 333 334 ip->i_d.di_dmevmask = evmask; 335 ip->i_d.di_dmstate = state; 336 337 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 338 error = xfs_trans_commit(tp); 339 340 return error; 341 } 342 343 STATIC int 344 xfs_fssetdm_by_handle( 345 struct file *parfilp, 346 void __user *arg) 347 { 348 int error; 349 struct fsdmidata fsd; 350 xfs_fsop_setdm_handlereq_t dmhreq; 351 struct dentry *dentry; 352 353 if (!capable(CAP_MKNOD)) 354 return -EPERM; 355 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) 356 return -EFAULT; 357 358 error = mnt_want_write_file(parfilp); 359 if (error) 360 return error; 361 362 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); 363 if (IS_ERR(dentry)) { 364 mnt_drop_write_file(parfilp); 365 return PTR_ERR(dentry); 366 } 367 368 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) { 369 error = -EPERM; 370 goto out; 371 } 372 373 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { 374 error = -EFAULT; 375 goto out; 376 } 377 378 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask, 379 fsd.fsd_dmstate); 380 381 out: 382 mnt_drop_write_file(parfilp); 383 dput(dentry); 384 return error; 385 } 386 387 STATIC int 388 xfs_attrlist_by_handle( 389 struct file *parfilp, 390 void __user *arg) 391 { 392 int error = -ENOMEM; 393 attrlist_cursor_kern_t *cursor; 394 struct xfs_fsop_attrlist_handlereq __user *p = arg; 395 xfs_fsop_attrlist_handlereq_t al_hreq; 396 struct dentry *dentry; 397 char *kbuf; 398 399 if (!capable(CAP_SYS_ADMIN)) 400 return -EPERM; 401 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 402 return -EFAULT; 403 if (al_hreq.buflen < sizeof(struct attrlist) || 404 al_hreq.buflen > XFS_XATTR_LIST_MAX) 405 return -EINVAL; 406 407 /* 408 * Reject flags, only allow namespaces. 409 */ 410 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 411 return -EINVAL; 412 413 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 414 if (IS_ERR(dentry)) 415 return PTR_ERR(dentry); 416 417 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); 418 if (!kbuf) 419 goto out_dput; 420 421 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 422 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen, 423 al_hreq.flags, cursor); 424 if (error) 425 goto out_kfree; 426 427 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) { 428 error = -EFAULT; 429 goto out_kfree; 430 } 431 432 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 433 error = -EFAULT; 434 435 out_kfree: 436 kmem_free(kbuf); 437 out_dput: 438 dput(dentry); 439 return error; 440 } 441 442 int 443 xfs_attrmulti_attr_get( 444 struct inode *inode, 445 unsigned char *name, 446 unsigned char __user *ubuf, 447 uint32_t *len, 448 uint32_t flags) 449 { 450 unsigned char *kbuf; 451 int error = -EFAULT; 452 453 if (*len > XFS_XATTR_SIZE_MAX) 454 return -EINVAL; 455 kbuf = kmem_zalloc_large(*len, KM_SLEEP); 456 if (!kbuf) 457 return -ENOMEM; 458 459 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); 460 if (error) 461 goto out_kfree; 462 463 if (copy_to_user(ubuf, kbuf, *len)) 464 error = -EFAULT; 465 466 out_kfree: 467 kmem_free(kbuf); 468 return error; 469 } 470 471 int 472 xfs_attrmulti_attr_set( 473 struct inode *inode, 474 unsigned char *name, 475 const unsigned char __user *ubuf, 476 uint32_t len, 477 uint32_t flags) 478 { 479 unsigned char *kbuf; 480 int error; 481 482 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 483 return -EPERM; 484 if (len > XFS_XATTR_SIZE_MAX) 485 return -EINVAL; 486 487 kbuf = memdup_user(ubuf, len); 488 if (IS_ERR(kbuf)) 489 return PTR_ERR(kbuf); 490 491 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 492 if (!error) 493 xfs_forget_acl(inode, name, flags); 494 kfree(kbuf); 495 return error; 496 } 497 498 int 499 xfs_attrmulti_attr_remove( 500 struct inode *inode, 501 unsigned char *name, 502 uint32_t flags) 503 { 504 int error; 505 506 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 507 return -EPERM; 508 error = xfs_attr_remove(XFS_I(inode), name, flags); 509 if (!error) 510 xfs_forget_acl(inode, name, flags); 511 return error; 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 -EPERM; 528 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 529 return -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 d_inode(dentry), 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 d_inode(dentry), 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 d_inode(dentry), 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 = -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 file *filp, 609 unsigned int cmd, 610 xfs_flock64_t *bf) 611 { 612 struct inode *inode = file_inode(filp); 613 struct xfs_inode *ip = XFS_I(inode); 614 struct iattr iattr; 615 enum xfs_prealloc_flags flags = 0; 616 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; 617 int error; 618 619 /* 620 * Only allow the sys admin to reserve space unless 621 * unwritten extents are enabled. 622 */ 623 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && 624 !capable(CAP_SYS_ADMIN)) 625 return -EPERM; 626 627 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 628 return -EPERM; 629 630 if (!(filp->f_mode & FMODE_WRITE)) 631 return -EBADF; 632 633 if (!S_ISREG(inode->i_mode)) 634 return -EINVAL; 635 636 if (filp->f_flags & O_DSYNC) 637 flags |= XFS_PREALLOC_SYNC; 638 if (filp->f_mode & FMODE_NOCMTIME) 639 flags |= XFS_PREALLOC_INVISIBLE; 640 641 error = mnt_want_write_file(filp); 642 if (error) 643 return error; 644 645 xfs_ilock(ip, iolock); 646 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); 647 if (error) 648 goto out_unlock; 649 650 switch (bf->l_whence) { 651 case 0: /*SEEK_SET*/ 652 break; 653 case 1: /*SEEK_CUR*/ 654 bf->l_start += filp->f_pos; 655 break; 656 case 2: /*SEEK_END*/ 657 bf->l_start += XFS_ISIZE(ip); 658 break; 659 default: 660 error = -EINVAL; 661 goto out_unlock; 662 } 663 664 /* 665 * length of <= 0 for resv/unresv/zero is invalid. length for 666 * alloc/free is ignored completely and we have no idea what userspace 667 * might have set it to, so set it to zero to allow range 668 * checks to pass. 669 */ 670 switch (cmd) { 671 case XFS_IOC_ZERO_RANGE: 672 case XFS_IOC_RESVSP: 673 case XFS_IOC_RESVSP64: 674 case XFS_IOC_UNRESVSP: 675 case XFS_IOC_UNRESVSP64: 676 if (bf->l_len <= 0) { 677 error = -EINVAL; 678 goto out_unlock; 679 } 680 break; 681 default: 682 bf->l_len = 0; 683 break; 684 } 685 686 if (bf->l_start < 0 || 687 bf->l_start > inode->i_sb->s_maxbytes || 688 bf->l_start + bf->l_len < 0 || 689 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) { 690 error = -EINVAL; 691 goto out_unlock; 692 } 693 694 switch (cmd) { 695 case XFS_IOC_ZERO_RANGE: 696 flags |= XFS_PREALLOC_SET; 697 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); 698 break; 699 case XFS_IOC_RESVSP: 700 case XFS_IOC_RESVSP64: 701 flags |= XFS_PREALLOC_SET; 702 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, 703 XFS_BMAPI_PREALLOC); 704 break; 705 case XFS_IOC_UNRESVSP: 706 case XFS_IOC_UNRESVSP64: 707 error = xfs_free_file_space(ip, bf->l_start, bf->l_len); 708 break; 709 case XFS_IOC_ALLOCSP: 710 case XFS_IOC_ALLOCSP64: 711 case XFS_IOC_FREESP: 712 case XFS_IOC_FREESP64: 713 flags |= XFS_PREALLOC_CLEAR; 714 if (bf->l_start > XFS_ISIZE(ip)) { 715 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 716 bf->l_start - XFS_ISIZE(ip), 0); 717 if (error) 718 goto out_unlock; 719 } 720 721 iattr.ia_valid = ATTR_SIZE; 722 iattr.ia_size = bf->l_start; 723 724 error = xfs_vn_setattr_size(file_dentry(filp), &iattr); 725 break; 726 default: 727 ASSERT(0); 728 error = -EINVAL; 729 } 730 731 if (error) 732 goto out_unlock; 733 734 error = xfs_update_prealloc_flags(ip, flags); 735 736 out_unlock: 737 xfs_iunlock(ip, iolock); 738 mnt_drop_write_file(filp); 739 return error; 740 } 741 742 STATIC int 743 xfs_ioc_bulkstat( 744 xfs_mount_t *mp, 745 unsigned int cmd, 746 void __user *arg) 747 { 748 xfs_fsop_bulkreq_t bulkreq; 749 int count; /* # of records returned */ 750 xfs_ino_t inlast; /* last inode number */ 751 int done; 752 int error; 753 754 /* done = 1 if there are more stats to get and if bulkstat */ 755 /* should be called again (unused here, but used in dmapi) */ 756 757 if (!capable(CAP_SYS_ADMIN)) 758 return -EPERM; 759 760 if (XFS_FORCED_SHUTDOWN(mp)) 761 return -EIO; 762 763 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) 764 return -EFAULT; 765 766 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) 767 return -EFAULT; 768 769 if ((count = bulkreq.icount) <= 0) 770 return -EINVAL; 771 772 if (bulkreq.ubuffer == NULL) 773 return -EINVAL; 774 775 if (cmd == XFS_IOC_FSINUMBERS) 776 error = xfs_inumbers(mp, &inlast, &count, 777 bulkreq.ubuffer, xfs_inumbers_fmt); 778 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) 779 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer, 780 sizeof(xfs_bstat_t), NULL, &done); 781 else /* XFS_IOC_FSBULKSTAT */ 782 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, 783 sizeof(xfs_bstat_t), bulkreq.ubuffer, 784 &done); 785 786 if (error) 787 return error; 788 789 if (bulkreq.ocount != NULL) { 790 if (copy_to_user(bulkreq.lastip, &inlast, 791 sizeof(xfs_ino_t))) 792 return -EFAULT; 793 794 if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) 795 return -EFAULT; 796 } 797 798 return 0; 799 } 800 801 STATIC int 802 xfs_ioc_fsgeometry_v1( 803 xfs_mount_t *mp, 804 void __user *arg) 805 { 806 xfs_fsop_geom_t fsgeo; 807 int error; 808 809 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 3); 810 if (error) 811 return error; 812 813 /* 814 * Caller should have passed an argument of type 815 * xfs_fsop_geom_v1_t. This is a proper subset of the 816 * xfs_fsop_geom_t that xfs_fs_geometry() fills in. 817 */ 818 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) 819 return -EFAULT; 820 return 0; 821 } 822 823 STATIC int 824 xfs_ioc_fsgeometry( 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->m_sb, &fsgeo, 4); 832 if (error) 833 return error; 834 835 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) 836 return -EFAULT; 837 return 0; 838 } 839 840 /* 841 * Linux extended inode flags interface. 842 */ 843 844 STATIC unsigned int 845 xfs_merge_ioc_xflags( 846 unsigned int flags, 847 unsigned int start) 848 { 849 unsigned int xflags = start; 850 851 if (flags & FS_IMMUTABLE_FL) 852 xflags |= FS_XFLAG_IMMUTABLE; 853 else 854 xflags &= ~FS_XFLAG_IMMUTABLE; 855 if (flags & FS_APPEND_FL) 856 xflags |= FS_XFLAG_APPEND; 857 else 858 xflags &= ~FS_XFLAG_APPEND; 859 if (flags & FS_SYNC_FL) 860 xflags |= FS_XFLAG_SYNC; 861 else 862 xflags &= ~FS_XFLAG_SYNC; 863 if (flags & FS_NOATIME_FL) 864 xflags |= FS_XFLAG_NOATIME; 865 else 866 xflags &= ~FS_XFLAG_NOATIME; 867 if (flags & FS_NODUMP_FL) 868 xflags |= FS_XFLAG_NODUMP; 869 else 870 xflags &= ~FS_XFLAG_NODUMP; 871 872 return xflags; 873 } 874 875 STATIC unsigned int 876 xfs_di2lxflags( 877 uint16_t di_flags) 878 { 879 unsigned int flags = 0; 880 881 if (di_flags & XFS_DIFLAG_IMMUTABLE) 882 flags |= FS_IMMUTABLE_FL; 883 if (di_flags & XFS_DIFLAG_APPEND) 884 flags |= FS_APPEND_FL; 885 if (di_flags & XFS_DIFLAG_SYNC) 886 flags |= FS_SYNC_FL; 887 if (di_flags & XFS_DIFLAG_NOATIME) 888 flags |= FS_NOATIME_FL; 889 if (di_flags & XFS_DIFLAG_NODUMP) 890 flags |= FS_NODUMP_FL; 891 return flags; 892 } 893 894 STATIC int 895 xfs_ioc_fsgetxattr( 896 xfs_inode_t *ip, 897 int attr, 898 void __user *arg) 899 { 900 struct fsxattr fa; 901 902 memset(&fa, 0, sizeof(struct fsxattr)); 903 904 xfs_ilock(ip, XFS_ILOCK_SHARED); 905 fa.fsx_xflags = xfs_ip2xflags(ip); 906 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 907 fa.fsx_cowextsize = ip->i_d.di_cowextsize << 908 ip->i_mount->m_sb.sb_blocklog; 909 fa.fsx_projid = xfs_get_projid(ip); 910 911 if (attr) { 912 if (ip->i_afp) { 913 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 914 fa.fsx_nextents = xfs_iext_count(ip->i_afp); 915 else 916 fa.fsx_nextents = ip->i_d.di_anextents; 917 } else 918 fa.fsx_nextents = 0; 919 } else { 920 if (ip->i_df.if_flags & XFS_IFEXTENTS) 921 fa.fsx_nextents = xfs_iext_count(&ip->i_df); 922 else 923 fa.fsx_nextents = ip->i_d.di_nextents; 924 } 925 xfs_iunlock(ip, XFS_ILOCK_SHARED); 926 927 if (copy_to_user(arg, &fa, sizeof(fa))) 928 return -EFAULT; 929 return 0; 930 } 931 932 STATIC uint16_t 933 xfs_flags2diflags( 934 struct xfs_inode *ip, 935 unsigned int xflags) 936 { 937 /* can't set PREALLOC this way, just preserve it */ 938 uint16_t di_flags = 939 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 940 941 if (xflags & FS_XFLAG_IMMUTABLE) 942 di_flags |= XFS_DIFLAG_IMMUTABLE; 943 if (xflags & FS_XFLAG_APPEND) 944 di_flags |= XFS_DIFLAG_APPEND; 945 if (xflags & FS_XFLAG_SYNC) 946 di_flags |= XFS_DIFLAG_SYNC; 947 if (xflags & FS_XFLAG_NOATIME) 948 di_flags |= XFS_DIFLAG_NOATIME; 949 if (xflags & FS_XFLAG_NODUMP) 950 di_flags |= XFS_DIFLAG_NODUMP; 951 if (xflags & FS_XFLAG_NODEFRAG) 952 di_flags |= XFS_DIFLAG_NODEFRAG; 953 if (xflags & FS_XFLAG_FILESTREAM) 954 di_flags |= XFS_DIFLAG_FILESTREAM; 955 if (S_ISDIR(VFS_I(ip)->i_mode)) { 956 if (xflags & FS_XFLAG_RTINHERIT) 957 di_flags |= XFS_DIFLAG_RTINHERIT; 958 if (xflags & FS_XFLAG_NOSYMLINKS) 959 di_flags |= XFS_DIFLAG_NOSYMLINKS; 960 if (xflags & FS_XFLAG_EXTSZINHERIT) 961 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 962 if (xflags & FS_XFLAG_PROJINHERIT) 963 di_flags |= XFS_DIFLAG_PROJINHERIT; 964 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 965 if (xflags & FS_XFLAG_REALTIME) 966 di_flags |= XFS_DIFLAG_REALTIME; 967 if (xflags & FS_XFLAG_EXTSIZE) 968 di_flags |= XFS_DIFLAG_EXTSIZE; 969 } 970 971 return di_flags; 972 } 973 974 STATIC uint64_t 975 xfs_flags2diflags2( 976 struct xfs_inode *ip, 977 unsigned int xflags) 978 { 979 uint64_t di_flags2 = 980 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK); 981 982 if (xflags & FS_XFLAG_DAX) 983 di_flags2 |= XFS_DIFLAG2_DAX; 984 if (xflags & FS_XFLAG_COWEXTSIZE) 985 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 986 987 return di_flags2; 988 } 989 990 STATIC void 991 xfs_diflags_to_linux( 992 struct xfs_inode *ip) 993 { 994 struct inode *inode = VFS_I(ip); 995 unsigned int xflags = xfs_ip2xflags(ip); 996 997 if (xflags & FS_XFLAG_IMMUTABLE) 998 inode->i_flags |= S_IMMUTABLE; 999 else 1000 inode->i_flags &= ~S_IMMUTABLE; 1001 if (xflags & FS_XFLAG_APPEND) 1002 inode->i_flags |= S_APPEND; 1003 else 1004 inode->i_flags &= ~S_APPEND; 1005 if (xflags & FS_XFLAG_SYNC) 1006 inode->i_flags |= S_SYNC; 1007 else 1008 inode->i_flags &= ~S_SYNC; 1009 if (xflags & FS_XFLAG_NOATIME) 1010 inode->i_flags |= S_NOATIME; 1011 else 1012 inode->i_flags &= ~S_NOATIME; 1013 #if 0 /* disabled until the flag switching races are sorted out */ 1014 if (xflags & FS_XFLAG_DAX) 1015 inode->i_flags |= S_DAX; 1016 else 1017 inode->i_flags &= ~S_DAX; 1018 #endif 1019 } 1020 1021 static int 1022 xfs_ioctl_setattr_xflags( 1023 struct xfs_trans *tp, 1024 struct xfs_inode *ip, 1025 struct fsxattr *fa) 1026 { 1027 struct xfs_mount *mp = ip->i_mount; 1028 uint64_t di_flags2; 1029 1030 /* Can't change realtime flag if any extents are allocated. */ 1031 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1032 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1033 return -EINVAL; 1034 1035 /* If realtime flag is set then must have realtime device */ 1036 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1037 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1038 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1039 return -EINVAL; 1040 } 1041 1042 /* Clear reflink if we are actually able to set the rt flag. */ 1043 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1044 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; 1045 1046 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1047 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1048 return -EINVAL; 1049 1050 /* 1051 * Can't modify an immutable/append-only file unless 1052 * we have appropriate permission. 1053 */ 1054 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) || 1055 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) && 1056 !capable(CAP_LINUX_IMMUTABLE)) 1057 return -EPERM; 1058 1059 /* diflags2 only valid for v3 inodes. */ 1060 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1061 if (di_flags2 && ip->i_d.di_version < 3) 1062 return -EINVAL; 1063 1064 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags); 1065 ip->i_d.di_flags2 = di_flags2; 1066 1067 xfs_diflags_to_linux(ip); 1068 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1069 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1070 XFS_STATS_INC(mp, xs_ig_attrchg); 1071 return 0; 1072 } 1073 1074 /* 1075 * If we are changing DAX flags, we have to ensure the file is clean and any 1076 * cached objects in the address space are invalidated and removed. This 1077 * requires us to lock out other IO and page faults similar to a truncate 1078 * operation. The locks need to be held until the transaction has been committed 1079 * so that the cache invalidation is atomic with respect to the DAX flag 1080 * manipulation. 1081 */ 1082 static int 1083 xfs_ioctl_setattr_dax_invalidate( 1084 struct xfs_inode *ip, 1085 struct fsxattr *fa, 1086 int *join_flags) 1087 { 1088 struct inode *inode = VFS_I(ip); 1089 struct super_block *sb = inode->i_sb; 1090 int error; 1091 1092 *join_flags = 0; 1093 1094 /* 1095 * It is only valid to set the DAX flag on regular files and 1096 * directories on filesystems where the block size is equal to the page 1097 * size. On directories it serves as an inherit hint. 1098 */ 1099 if (fa->fsx_xflags & FS_XFLAG_DAX) { 1100 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) 1101 return -EINVAL; 1102 if (!bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)), 1103 sb->s_blocksize)) 1104 return -EINVAL; 1105 } 1106 1107 /* If the DAX state is not changing, we have nothing to do here. */ 1108 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode)) 1109 return 0; 1110 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode)) 1111 return 0; 1112 1113 /* lock, flush and invalidate mapping in preparation for flag change */ 1114 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1115 error = filemap_write_and_wait(inode->i_mapping); 1116 if (error) 1117 goto out_unlock; 1118 error = invalidate_inode_pages2(inode->i_mapping); 1119 if (error) 1120 goto out_unlock; 1121 1122 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL; 1123 return 0; 1124 1125 out_unlock: 1126 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1127 return error; 1128 1129 } 1130 1131 /* 1132 * Set up the transaction structure for the setattr operation, checking that we 1133 * have permission to do so. On success, return a clean transaction and the 1134 * inode locked exclusively ready for further operation specific checks. On 1135 * failure, return an error without modifying or locking the inode. 1136 * 1137 * The inode might already be IO locked on call. If this is the case, it is 1138 * indicated in @join_flags and we take full responsibility for ensuring they 1139 * are unlocked from now on. Hence if we have an error here, we still have to 1140 * unlock them. Otherwise, once they are joined to the transaction, they will 1141 * be unlocked on commit/cancel. 1142 */ 1143 static struct xfs_trans * 1144 xfs_ioctl_setattr_get_trans( 1145 struct xfs_inode *ip, 1146 int join_flags) 1147 { 1148 struct xfs_mount *mp = ip->i_mount; 1149 struct xfs_trans *tp; 1150 int error = -EROFS; 1151 1152 if (mp->m_flags & XFS_MOUNT_RDONLY) 1153 goto out_unlock; 1154 error = -EIO; 1155 if (XFS_FORCED_SHUTDOWN(mp)) 1156 goto out_unlock; 1157 1158 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1159 if (error) 1160 return ERR_PTR(error); 1161 1162 xfs_ilock(ip, XFS_ILOCK_EXCL); 1163 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags); 1164 join_flags = 0; 1165 1166 /* 1167 * CAP_FOWNER overrides the following restrictions: 1168 * 1169 * The user ID of the calling process must be equal to the file owner 1170 * ID, except in cases where the CAP_FSETID capability is applicable. 1171 */ 1172 if (!inode_owner_or_capable(VFS_I(ip))) { 1173 error = -EPERM; 1174 goto out_cancel; 1175 } 1176 1177 if (mp->m_flags & XFS_MOUNT_WSYNC) 1178 xfs_trans_set_sync(tp); 1179 1180 return tp; 1181 1182 out_cancel: 1183 xfs_trans_cancel(tp); 1184 out_unlock: 1185 if (join_flags) 1186 xfs_iunlock(ip, join_flags); 1187 return ERR_PTR(error); 1188 } 1189 1190 /* 1191 * extent size hint validation is somewhat cumbersome. Rules are: 1192 * 1193 * 1. extent size hint is only valid for directories and regular files 1194 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1195 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1196 * 4. can only be changed on regular files if no extents are allocated 1197 * 5. can be changed on directories at any time 1198 * 6. extsize hint of 0 turns off hints, clears inode flags. 1199 * 7. Extent size must be a multiple of the appropriate block size. 1200 * 8. for non-realtime files, the extent size hint must be limited 1201 * to half the AG size to avoid alignment extending the extent beyond the 1202 * limits of the AG. 1203 * 1204 * Please keep this function in sync with xfs_scrub_inode_extsize. 1205 */ 1206 static int 1207 xfs_ioctl_setattr_check_extsize( 1208 struct xfs_inode *ip, 1209 struct fsxattr *fa) 1210 { 1211 struct xfs_mount *mp = ip->i_mount; 1212 1213 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode)) 1214 return -EINVAL; 1215 1216 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) && 1217 !S_ISDIR(VFS_I(ip)->i_mode)) 1218 return -EINVAL; 1219 1220 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents && 1221 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1222 return -EINVAL; 1223 1224 if (fa->fsx_extsize != 0) { 1225 xfs_extlen_t size; 1226 xfs_fsblock_t extsize_fsb; 1227 1228 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1229 if (extsize_fsb > MAXEXTLEN) 1230 return -EINVAL; 1231 1232 if (XFS_IS_REALTIME_INODE(ip) || 1233 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1234 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1235 } else { 1236 size = mp->m_sb.sb_blocksize; 1237 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1238 return -EINVAL; 1239 } 1240 1241 if (fa->fsx_extsize % size) 1242 return -EINVAL; 1243 } else 1244 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT); 1245 1246 return 0; 1247 } 1248 1249 /* 1250 * CoW extent size hint validation rules are: 1251 * 1252 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1253 * The inode does not have to have any shared blocks, but it must be a v3. 1254 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1255 * for a directory, the hint is propagated to new files. 1256 * 3. Can be changed on files & directories at any time. 1257 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1258 * 5. Extent size must be a multiple of the appropriate block size. 1259 * 6. The extent size hint must be limited to half the AG size to avoid 1260 * alignment extending the extent beyond the limits of the AG. 1261 * 1262 * Please keep this function in sync with xfs_scrub_inode_cowextsize. 1263 */ 1264 static int 1265 xfs_ioctl_setattr_check_cowextsize( 1266 struct xfs_inode *ip, 1267 struct fsxattr *fa) 1268 { 1269 struct xfs_mount *mp = ip->i_mount; 1270 1271 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1272 return 0; 1273 1274 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) || 1275 ip->i_d.di_version != 3) 1276 return -EINVAL; 1277 1278 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode)) 1279 return -EINVAL; 1280 1281 if (fa->fsx_cowextsize != 0) { 1282 xfs_extlen_t size; 1283 xfs_fsblock_t cowextsize_fsb; 1284 1285 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1286 if (cowextsize_fsb > MAXEXTLEN) 1287 return -EINVAL; 1288 1289 size = mp->m_sb.sb_blocksize; 1290 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1291 return -EINVAL; 1292 1293 if (fa->fsx_cowextsize % size) 1294 return -EINVAL; 1295 } else 1296 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE; 1297 1298 return 0; 1299 } 1300 1301 static int 1302 xfs_ioctl_setattr_check_projid( 1303 struct xfs_inode *ip, 1304 struct fsxattr *fa) 1305 { 1306 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1307 if (fa->fsx_projid > (uint16_t)-1 && 1308 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1309 return -EINVAL; 1310 1311 /* 1312 * Project Quota ID state is only allowed to change from within the init 1313 * namespace. Enforce that restriction only if we are trying to change 1314 * the quota ID state. Everything else is allowed in user namespaces. 1315 */ 1316 if (current_user_ns() == &init_user_ns) 1317 return 0; 1318 1319 if (xfs_get_projid(ip) != fa->fsx_projid) 1320 return -EINVAL; 1321 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) != 1322 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)) 1323 return -EINVAL; 1324 1325 return 0; 1326 } 1327 1328 STATIC int 1329 xfs_ioctl_setattr( 1330 xfs_inode_t *ip, 1331 struct fsxattr *fa) 1332 { 1333 struct xfs_mount *mp = ip->i_mount; 1334 struct xfs_trans *tp; 1335 struct xfs_dquot *udqp = NULL; 1336 struct xfs_dquot *pdqp = NULL; 1337 struct xfs_dquot *olddquot = NULL; 1338 int code; 1339 int join_flags = 0; 1340 1341 trace_xfs_ioctl_setattr(ip); 1342 1343 code = xfs_ioctl_setattr_check_projid(ip, fa); 1344 if (code) 1345 return code; 1346 1347 /* 1348 * If disk quotas is on, we make sure that the dquots do exist on disk, 1349 * before we start any other transactions. Trying to do this later 1350 * is messy. We don't care to take a readlock to look at the ids 1351 * in inode here, because we can't hold it across the trans_reserve. 1352 * If the IDs do change before we take the ilock, we're covered 1353 * because the i_*dquot fields will get updated anyway. 1354 */ 1355 if (XFS_IS_QUOTA_ON(mp)) { 1356 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1357 ip->i_d.di_gid, fa->fsx_projid, 1358 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1359 if (code) 1360 return code; 1361 } 1362 1363 /* 1364 * Changing DAX config may require inode locking for mapping 1365 * invalidation. These need to be held all the way to transaction commit 1366 * or cancel time, so need to be passed through to 1367 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1368 * appropriately. 1369 */ 1370 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags); 1371 if (code) 1372 goto error_free_dquots; 1373 1374 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1375 if (IS_ERR(tp)) { 1376 code = PTR_ERR(tp); 1377 goto error_free_dquots; 1378 } 1379 1380 1381 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1382 xfs_get_projid(ip) != fa->fsx_projid) { 1383 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1384 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1385 if (code) /* out of quota */ 1386 goto error_trans_cancel; 1387 } 1388 1389 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1390 if (code) 1391 goto error_trans_cancel; 1392 1393 code = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1394 if (code) 1395 goto error_trans_cancel; 1396 1397 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1398 if (code) 1399 goto error_trans_cancel; 1400 1401 /* 1402 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1403 * overrides the following restrictions: 1404 * 1405 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1406 * successful return from chown() 1407 */ 1408 1409 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1410 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1411 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1412 1413 /* Change the ownerships and register project quota modifications */ 1414 if (xfs_get_projid(ip) != fa->fsx_projid) { 1415 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1416 olddquot = xfs_qm_vop_chown(tp, ip, 1417 &ip->i_pdquot, pdqp); 1418 } 1419 ASSERT(ip->i_d.di_version > 1); 1420 xfs_set_projid(ip, fa->fsx_projid); 1421 } 1422 1423 /* 1424 * Only set the extent size hint if we've already determined that the 1425 * extent size hint should be set on the inode. If no extent size flags 1426 * are set on the inode then unconditionally clear the extent size hint. 1427 */ 1428 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1429 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1430 else 1431 ip->i_d.di_extsize = 0; 1432 if (ip->i_d.di_version == 3 && 1433 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) 1434 ip->i_d.di_cowextsize = fa->fsx_cowextsize >> 1435 mp->m_sb.sb_blocklog; 1436 else 1437 ip->i_d.di_cowextsize = 0; 1438 1439 code = xfs_trans_commit(tp); 1440 1441 /* 1442 * Release any dquot(s) the inode had kept before chown. 1443 */ 1444 xfs_qm_dqrele(olddquot); 1445 xfs_qm_dqrele(udqp); 1446 xfs_qm_dqrele(pdqp); 1447 1448 return code; 1449 1450 error_trans_cancel: 1451 xfs_trans_cancel(tp); 1452 error_free_dquots: 1453 xfs_qm_dqrele(udqp); 1454 xfs_qm_dqrele(pdqp); 1455 return code; 1456 } 1457 1458 STATIC int 1459 xfs_ioc_fssetxattr( 1460 xfs_inode_t *ip, 1461 struct file *filp, 1462 void __user *arg) 1463 { 1464 struct fsxattr fa; 1465 int error; 1466 1467 if (copy_from_user(&fa, arg, sizeof(fa))) 1468 return -EFAULT; 1469 1470 error = mnt_want_write_file(filp); 1471 if (error) 1472 return error; 1473 error = xfs_ioctl_setattr(ip, &fa); 1474 mnt_drop_write_file(filp); 1475 return error; 1476 } 1477 1478 STATIC int 1479 xfs_ioc_getxflags( 1480 xfs_inode_t *ip, 1481 void __user *arg) 1482 { 1483 unsigned int flags; 1484 1485 flags = xfs_di2lxflags(ip->i_d.di_flags); 1486 if (copy_to_user(arg, &flags, sizeof(flags))) 1487 return -EFAULT; 1488 return 0; 1489 } 1490 1491 STATIC int 1492 xfs_ioc_setxflags( 1493 struct xfs_inode *ip, 1494 struct file *filp, 1495 void __user *arg) 1496 { 1497 struct xfs_trans *tp; 1498 struct fsxattr fa; 1499 unsigned int flags; 1500 int join_flags = 0; 1501 int error; 1502 1503 if (copy_from_user(&flags, arg, sizeof(flags))) 1504 return -EFAULT; 1505 1506 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1507 FS_NOATIME_FL | FS_NODUMP_FL | \ 1508 FS_SYNC_FL)) 1509 return -EOPNOTSUPP; 1510 1511 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1512 1513 error = mnt_want_write_file(filp); 1514 if (error) 1515 return error; 1516 1517 /* 1518 * Changing DAX config may require inode locking for mapping 1519 * invalidation. These need to be held all the way to transaction commit 1520 * or cancel time, so need to be passed through to 1521 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1522 * appropriately. 1523 */ 1524 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags); 1525 if (error) 1526 goto out_drop_write; 1527 1528 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1529 if (IS_ERR(tp)) { 1530 error = PTR_ERR(tp); 1531 goto out_drop_write; 1532 } 1533 1534 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1535 if (error) { 1536 xfs_trans_cancel(tp); 1537 goto out_drop_write; 1538 } 1539 1540 error = xfs_trans_commit(tp); 1541 out_drop_write: 1542 mnt_drop_write_file(filp); 1543 return error; 1544 } 1545 1546 static bool 1547 xfs_getbmap_format( 1548 struct kgetbmap *p, 1549 struct getbmapx __user *u, 1550 size_t recsize) 1551 { 1552 if (put_user(p->bmv_offset, &u->bmv_offset) || 1553 put_user(p->bmv_block, &u->bmv_block) || 1554 put_user(p->bmv_length, &u->bmv_length) || 1555 put_user(0, &u->bmv_count) || 1556 put_user(0, &u->bmv_entries)) 1557 return false; 1558 if (recsize < sizeof(struct getbmapx)) 1559 return true; 1560 if (put_user(0, &u->bmv_iflags) || 1561 put_user(p->bmv_oflags, &u->bmv_oflags) || 1562 put_user(0, &u->bmv_unused1) || 1563 put_user(0, &u->bmv_unused2)) 1564 return false; 1565 return true; 1566 } 1567 1568 STATIC int 1569 xfs_ioc_getbmap( 1570 struct file *file, 1571 unsigned int cmd, 1572 void __user *arg) 1573 { 1574 struct getbmapx bmx = { 0 }; 1575 struct kgetbmap *buf; 1576 size_t recsize; 1577 int error, i; 1578 1579 switch (cmd) { 1580 case XFS_IOC_GETBMAPA: 1581 bmx.bmv_iflags = BMV_IF_ATTRFORK; 1582 /*FALLTHRU*/ 1583 case XFS_IOC_GETBMAP: 1584 if (file->f_mode & FMODE_NOCMTIME) 1585 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1586 /* struct getbmap is a strict subset of struct getbmapx. */ 1587 recsize = sizeof(struct getbmap); 1588 break; 1589 case XFS_IOC_GETBMAPX: 1590 recsize = sizeof(struct getbmapx); 1591 break; 1592 default: 1593 return -EINVAL; 1594 } 1595 1596 if (copy_from_user(&bmx, arg, recsize)) 1597 return -EFAULT; 1598 1599 if (bmx.bmv_count < 2) 1600 return -EINVAL; 1601 if (bmx.bmv_count > ULONG_MAX / recsize) 1602 return -ENOMEM; 1603 1604 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0); 1605 if (!buf) 1606 return -ENOMEM; 1607 1608 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 1609 if (error) 1610 goto out_free_buf; 1611 1612 error = -EFAULT; 1613 if (copy_to_user(arg, &bmx, recsize)) 1614 goto out_free_buf; 1615 arg += recsize; 1616 1617 for (i = 0; i < bmx.bmv_entries; i++) { 1618 if (!xfs_getbmap_format(buf + i, arg, recsize)) 1619 goto out_free_buf; 1620 arg += recsize; 1621 } 1622 1623 error = 0; 1624 out_free_buf: 1625 kmem_free(buf); 1626 return 0; 1627 } 1628 1629 struct getfsmap_info { 1630 struct xfs_mount *mp; 1631 struct fsmap_head __user *data; 1632 unsigned int idx; 1633 __u32 last_flags; 1634 }; 1635 1636 STATIC int 1637 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv) 1638 { 1639 struct getfsmap_info *info = priv; 1640 struct fsmap fm; 1641 1642 trace_xfs_getfsmap_mapping(info->mp, xfm); 1643 1644 info->last_flags = xfm->fmr_flags; 1645 xfs_fsmap_from_internal(&fm, xfm); 1646 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm, 1647 sizeof(struct fsmap))) 1648 return -EFAULT; 1649 1650 return 0; 1651 } 1652 1653 STATIC int 1654 xfs_ioc_getfsmap( 1655 struct xfs_inode *ip, 1656 struct fsmap_head __user *arg) 1657 { 1658 struct getfsmap_info info = { NULL }; 1659 struct xfs_fsmap_head xhead = {0}; 1660 struct fsmap_head head; 1661 bool aborted = false; 1662 int error; 1663 1664 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1665 return -EFAULT; 1666 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1667 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1668 sizeof(head.fmh_keys[0].fmr_reserved)) || 1669 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1670 sizeof(head.fmh_keys[1].fmr_reserved))) 1671 return -EINVAL; 1672 1673 xhead.fmh_iflags = head.fmh_iflags; 1674 xhead.fmh_count = head.fmh_count; 1675 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1676 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1677 1678 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1679 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1680 1681 info.mp = ip->i_mount; 1682 info.data = arg; 1683 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info); 1684 if (error == XFS_BTREE_QUERY_RANGE_ABORT) { 1685 error = 0; 1686 aborted = true; 1687 } else if (error) 1688 return error; 1689 1690 /* If we didn't abort, set the "last" flag in the last fmx */ 1691 if (!aborted && info.idx) { 1692 info.last_flags |= FMR_OF_LAST; 1693 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags, 1694 &info.last_flags, sizeof(info.last_flags))) 1695 return -EFAULT; 1696 } 1697 1698 /* copy back header */ 1699 head.fmh_entries = xhead.fmh_entries; 1700 head.fmh_oflags = xhead.fmh_oflags; 1701 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 1702 return -EFAULT; 1703 1704 return 0; 1705 } 1706 1707 STATIC int 1708 xfs_ioc_scrub_metadata( 1709 struct xfs_inode *ip, 1710 void __user *arg) 1711 { 1712 struct xfs_scrub_metadata scrub; 1713 int error; 1714 1715 if (!capable(CAP_SYS_ADMIN)) 1716 return -EPERM; 1717 1718 if (copy_from_user(&scrub, arg, sizeof(scrub))) 1719 return -EFAULT; 1720 1721 error = xfs_scrub_metadata(ip, &scrub); 1722 if (error) 1723 return error; 1724 1725 if (copy_to_user(arg, &scrub, sizeof(scrub))) 1726 return -EFAULT; 1727 1728 return 0; 1729 } 1730 1731 int 1732 xfs_ioc_swapext( 1733 xfs_swapext_t *sxp) 1734 { 1735 xfs_inode_t *ip, *tip; 1736 struct fd f, tmp; 1737 int error = 0; 1738 1739 /* Pull information for the target fd */ 1740 f = fdget((int)sxp->sx_fdtarget); 1741 if (!f.file) { 1742 error = -EINVAL; 1743 goto out; 1744 } 1745 1746 if (!(f.file->f_mode & FMODE_WRITE) || 1747 !(f.file->f_mode & FMODE_READ) || 1748 (f.file->f_flags & O_APPEND)) { 1749 error = -EBADF; 1750 goto out_put_file; 1751 } 1752 1753 tmp = fdget((int)sxp->sx_fdtmp); 1754 if (!tmp.file) { 1755 error = -EINVAL; 1756 goto out_put_file; 1757 } 1758 1759 if (!(tmp.file->f_mode & FMODE_WRITE) || 1760 !(tmp.file->f_mode & FMODE_READ) || 1761 (tmp.file->f_flags & O_APPEND)) { 1762 error = -EBADF; 1763 goto out_put_tmp_file; 1764 } 1765 1766 if (IS_SWAPFILE(file_inode(f.file)) || 1767 IS_SWAPFILE(file_inode(tmp.file))) { 1768 error = -EINVAL; 1769 goto out_put_tmp_file; 1770 } 1771 1772 /* 1773 * We need to ensure that the fds passed in point to XFS inodes 1774 * before we cast and access them as XFS structures as we have no 1775 * control over what the user passes us here. 1776 */ 1777 if (f.file->f_op != &xfs_file_operations || 1778 tmp.file->f_op != &xfs_file_operations) { 1779 error = -EINVAL; 1780 goto out_put_tmp_file; 1781 } 1782 1783 ip = XFS_I(file_inode(f.file)); 1784 tip = XFS_I(file_inode(tmp.file)); 1785 1786 if (ip->i_mount != tip->i_mount) { 1787 error = -EINVAL; 1788 goto out_put_tmp_file; 1789 } 1790 1791 if (ip->i_ino == tip->i_ino) { 1792 error = -EINVAL; 1793 goto out_put_tmp_file; 1794 } 1795 1796 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1797 error = -EIO; 1798 goto out_put_tmp_file; 1799 } 1800 1801 error = xfs_swap_extents(ip, tip, sxp); 1802 1803 out_put_tmp_file: 1804 fdput(tmp); 1805 out_put_file: 1806 fdput(f); 1807 out: 1808 return error; 1809 } 1810 1811 static int 1812 xfs_ioc_getlabel( 1813 struct xfs_mount *mp, 1814 char __user *user_label) 1815 { 1816 struct xfs_sb *sbp = &mp->m_sb; 1817 char label[XFSLABEL_MAX + 1]; 1818 1819 /* Paranoia */ 1820 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 1821 1822 spin_lock(&mp->m_sb_lock); 1823 strncpy(label, sbp->sb_fname, sizeof(sbp->sb_fname)); 1824 spin_unlock(&mp->m_sb_lock); 1825 1826 /* xfs on-disk label is 12 chars, be sure we send a null to user */ 1827 label[XFSLABEL_MAX] = '\0'; 1828 if (copy_to_user(user_label, label, sizeof(sbp->sb_fname))) 1829 return -EFAULT; 1830 return 0; 1831 } 1832 1833 static int 1834 xfs_ioc_setlabel( 1835 struct file *filp, 1836 struct xfs_mount *mp, 1837 char __user *newlabel) 1838 { 1839 struct xfs_sb *sbp = &mp->m_sb; 1840 char label[XFSLABEL_MAX + 1]; 1841 size_t len; 1842 int error; 1843 1844 if (!capable(CAP_SYS_ADMIN)) 1845 return -EPERM; 1846 /* 1847 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 1848 * smaller, at 12 bytes. We copy one more to be sure we find the 1849 * (required) NULL character to test the incoming label length. 1850 * NB: The on disk label doesn't need to be null terminated. 1851 */ 1852 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 1853 return -EFAULT; 1854 len = strnlen(label, XFSLABEL_MAX + 1); 1855 if (len > sizeof(sbp->sb_fname)) 1856 return -EINVAL; 1857 1858 error = mnt_want_write_file(filp); 1859 if (error) 1860 return error; 1861 1862 spin_lock(&mp->m_sb_lock); 1863 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 1864 strncpy(sbp->sb_fname, label, sizeof(sbp->sb_fname)); 1865 spin_unlock(&mp->m_sb_lock); 1866 1867 /* 1868 * Now we do several things to satisfy userspace. 1869 * In addition to normal logging of the primary superblock, we also 1870 * immediately write these changes to sector zero for the primary, then 1871 * update all backup supers (as xfs_db does for a label change), then 1872 * invalidate the block device page cache. This is so that any prior 1873 * buffered reads from userspace (i.e. from blkid) are invalidated, 1874 * and userspace will see the newly-written label. 1875 */ 1876 error = xfs_sync_sb_buf(mp); 1877 if (error) 1878 goto out; 1879 /* 1880 * growfs also updates backup supers so lock against that. 1881 */ 1882 mutex_lock(&mp->m_growlock); 1883 error = xfs_update_secondary_sbs(mp); 1884 mutex_unlock(&mp->m_growlock); 1885 1886 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 1887 1888 out: 1889 mnt_drop_write_file(filp); 1890 return error; 1891 } 1892 1893 /* 1894 * Note: some of the ioctl's return positive numbers as a 1895 * byte count indicating success, such as readlink_by_handle. 1896 * So we don't "sign flip" like most other routines. This means 1897 * true errors need to be returned as a negative value. 1898 */ 1899 long 1900 xfs_file_ioctl( 1901 struct file *filp, 1902 unsigned int cmd, 1903 unsigned long p) 1904 { 1905 struct inode *inode = file_inode(filp); 1906 struct xfs_inode *ip = XFS_I(inode); 1907 struct xfs_mount *mp = ip->i_mount; 1908 void __user *arg = (void __user *)p; 1909 int error; 1910 1911 trace_xfs_file_ioctl(ip); 1912 1913 switch (cmd) { 1914 case FITRIM: 1915 return xfs_ioc_trim(mp, arg); 1916 case FS_IOC_GETFSLABEL: 1917 return xfs_ioc_getlabel(mp, arg); 1918 case FS_IOC_SETFSLABEL: 1919 return xfs_ioc_setlabel(filp, mp, arg); 1920 case XFS_IOC_ALLOCSP: 1921 case XFS_IOC_FREESP: 1922 case XFS_IOC_RESVSP: 1923 case XFS_IOC_UNRESVSP: 1924 case XFS_IOC_ALLOCSP64: 1925 case XFS_IOC_FREESP64: 1926 case XFS_IOC_RESVSP64: 1927 case XFS_IOC_UNRESVSP64: 1928 case XFS_IOC_ZERO_RANGE: { 1929 xfs_flock64_t bf; 1930 1931 if (copy_from_user(&bf, arg, sizeof(bf))) 1932 return -EFAULT; 1933 return xfs_ioc_space(filp, cmd, &bf); 1934 } 1935 case XFS_IOC_DIOINFO: { 1936 struct dioattr da; 1937 xfs_buftarg_t *target = 1938 XFS_IS_REALTIME_INODE(ip) ? 1939 mp->m_rtdev_targp : mp->m_ddev_targp; 1940 1941 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1942 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1943 1944 if (copy_to_user(arg, &da, sizeof(da))) 1945 return -EFAULT; 1946 return 0; 1947 } 1948 1949 case XFS_IOC_FSBULKSTAT_SINGLE: 1950 case XFS_IOC_FSBULKSTAT: 1951 case XFS_IOC_FSINUMBERS: 1952 return xfs_ioc_bulkstat(mp, cmd, arg); 1953 1954 case XFS_IOC_FSGEOMETRY_V1: 1955 return xfs_ioc_fsgeometry_v1(mp, arg); 1956 1957 case XFS_IOC_FSGEOMETRY: 1958 return xfs_ioc_fsgeometry(mp, arg); 1959 1960 case XFS_IOC_GETVERSION: 1961 return put_user(inode->i_generation, (int __user *)arg); 1962 1963 case XFS_IOC_FSGETXATTR: 1964 return xfs_ioc_fsgetxattr(ip, 0, arg); 1965 case XFS_IOC_FSGETXATTRA: 1966 return xfs_ioc_fsgetxattr(ip, 1, arg); 1967 case XFS_IOC_FSSETXATTR: 1968 return xfs_ioc_fssetxattr(ip, filp, arg); 1969 case XFS_IOC_GETXFLAGS: 1970 return xfs_ioc_getxflags(ip, arg); 1971 case XFS_IOC_SETXFLAGS: 1972 return xfs_ioc_setxflags(ip, filp, arg); 1973 1974 case XFS_IOC_FSSETDM: { 1975 struct fsdmidata dmi; 1976 1977 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1978 return -EFAULT; 1979 1980 error = mnt_want_write_file(filp); 1981 if (error) 1982 return error; 1983 1984 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1985 dmi.fsd_dmstate); 1986 mnt_drop_write_file(filp); 1987 return error; 1988 } 1989 1990 case XFS_IOC_GETBMAP: 1991 case XFS_IOC_GETBMAPA: 1992 case XFS_IOC_GETBMAPX: 1993 return xfs_ioc_getbmap(filp, cmd, arg); 1994 1995 case FS_IOC_GETFSMAP: 1996 return xfs_ioc_getfsmap(ip, arg); 1997 1998 case XFS_IOC_SCRUB_METADATA: 1999 return xfs_ioc_scrub_metadata(ip, arg); 2000 2001 case XFS_IOC_FD_TO_HANDLE: 2002 case XFS_IOC_PATH_TO_HANDLE: 2003 case XFS_IOC_PATH_TO_FSHANDLE: { 2004 xfs_fsop_handlereq_t hreq; 2005 2006 if (copy_from_user(&hreq, arg, sizeof(hreq))) 2007 return -EFAULT; 2008 return xfs_find_handle(cmd, &hreq); 2009 } 2010 case XFS_IOC_OPEN_BY_HANDLE: { 2011 xfs_fsop_handlereq_t hreq; 2012 2013 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2014 return -EFAULT; 2015 return xfs_open_by_handle(filp, &hreq); 2016 } 2017 case XFS_IOC_FSSETDM_BY_HANDLE: 2018 return xfs_fssetdm_by_handle(filp, arg); 2019 2020 case XFS_IOC_READLINK_BY_HANDLE: { 2021 xfs_fsop_handlereq_t hreq; 2022 2023 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2024 return -EFAULT; 2025 return xfs_readlink_by_handle(filp, &hreq); 2026 } 2027 case XFS_IOC_ATTRLIST_BY_HANDLE: 2028 return xfs_attrlist_by_handle(filp, arg); 2029 2030 case XFS_IOC_ATTRMULTI_BY_HANDLE: 2031 return xfs_attrmulti_by_handle(filp, arg); 2032 2033 case XFS_IOC_SWAPEXT: { 2034 struct xfs_swapext sxp; 2035 2036 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 2037 return -EFAULT; 2038 error = mnt_want_write_file(filp); 2039 if (error) 2040 return error; 2041 error = xfs_ioc_swapext(&sxp); 2042 mnt_drop_write_file(filp); 2043 return error; 2044 } 2045 2046 case XFS_IOC_FSCOUNTS: { 2047 xfs_fsop_counts_t out; 2048 2049 error = xfs_fs_counts(mp, &out); 2050 if (error) 2051 return error; 2052 2053 if (copy_to_user(arg, &out, sizeof(out))) 2054 return -EFAULT; 2055 return 0; 2056 } 2057 2058 case XFS_IOC_SET_RESBLKS: { 2059 xfs_fsop_resblks_t inout; 2060 uint64_t in; 2061 2062 if (!capable(CAP_SYS_ADMIN)) 2063 return -EPERM; 2064 2065 if (mp->m_flags & XFS_MOUNT_RDONLY) 2066 return -EROFS; 2067 2068 if (copy_from_user(&inout, arg, sizeof(inout))) 2069 return -EFAULT; 2070 2071 error = mnt_want_write_file(filp); 2072 if (error) 2073 return error; 2074 2075 /* input parameter is passed in resblks field of structure */ 2076 in = inout.resblks; 2077 error = xfs_reserve_blocks(mp, &in, &inout); 2078 mnt_drop_write_file(filp); 2079 if (error) 2080 return error; 2081 2082 if (copy_to_user(arg, &inout, sizeof(inout))) 2083 return -EFAULT; 2084 return 0; 2085 } 2086 2087 case XFS_IOC_GET_RESBLKS: { 2088 xfs_fsop_resblks_t out; 2089 2090 if (!capable(CAP_SYS_ADMIN)) 2091 return -EPERM; 2092 2093 error = xfs_reserve_blocks(mp, NULL, &out); 2094 if (error) 2095 return error; 2096 2097 if (copy_to_user(arg, &out, sizeof(out))) 2098 return -EFAULT; 2099 2100 return 0; 2101 } 2102 2103 case XFS_IOC_FSGROWFSDATA: { 2104 xfs_growfs_data_t in; 2105 2106 if (copy_from_user(&in, arg, sizeof(in))) 2107 return -EFAULT; 2108 2109 error = mnt_want_write_file(filp); 2110 if (error) 2111 return error; 2112 error = xfs_growfs_data(mp, &in); 2113 mnt_drop_write_file(filp); 2114 return error; 2115 } 2116 2117 case XFS_IOC_FSGROWFSLOG: { 2118 xfs_growfs_log_t in; 2119 2120 if (copy_from_user(&in, arg, sizeof(in))) 2121 return -EFAULT; 2122 2123 error = mnt_want_write_file(filp); 2124 if (error) 2125 return error; 2126 error = xfs_growfs_log(mp, &in); 2127 mnt_drop_write_file(filp); 2128 return error; 2129 } 2130 2131 case XFS_IOC_FSGROWFSRT: { 2132 xfs_growfs_rt_t in; 2133 2134 if (copy_from_user(&in, arg, sizeof(in))) 2135 return -EFAULT; 2136 2137 error = mnt_want_write_file(filp); 2138 if (error) 2139 return error; 2140 error = xfs_growfs_rt(mp, &in); 2141 mnt_drop_write_file(filp); 2142 return error; 2143 } 2144 2145 case XFS_IOC_GOINGDOWN: { 2146 uint32_t in; 2147 2148 if (!capable(CAP_SYS_ADMIN)) 2149 return -EPERM; 2150 2151 if (get_user(in, (uint32_t __user *)arg)) 2152 return -EFAULT; 2153 2154 return xfs_fs_goingdown(mp, in); 2155 } 2156 2157 case XFS_IOC_ERROR_INJECTION: { 2158 xfs_error_injection_t in; 2159 2160 if (!capable(CAP_SYS_ADMIN)) 2161 return -EPERM; 2162 2163 if (copy_from_user(&in, arg, sizeof(in))) 2164 return -EFAULT; 2165 2166 return xfs_errortag_add(mp, in.errtag); 2167 } 2168 2169 case XFS_IOC_ERROR_CLEARALL: 2170 if (!capable(CAP_SYS_ADMIN)) 2171 return -EPERM; 2172 2173 return xfs_errortag_clearall(mp); 2174 2175 case XFS_IOC_FREE_EOFBLOCKS: { 2176 struct xfs_fs_eofblocks eofb; 2177 struct xfs_eofblocks keofb; 2178 2179 if (!capable(CAP_SYS_ADMIN)) 2180 return -EPERM; 2181 2182 if (mp->m_flags & XFS_MOUNT_RDONLY) 2183 return -EROFS; 2184 2185 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2186 return -EFAULT; 2187 2188 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 2189 if (error) 2190 return error; 2191 2192 return xfs_icache_free_eofblocks(mp, &keofb); 2193 } 2194 2195 default: 2196 return -ENOTTY; 2197 } 2198 } 2199