1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_shared.h" 9 #include "xfs_format.h" 10 #include "xfs_log_format.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_mount.h" 13 #include "xfs_inode.h" 14 #include "xfs_rtalloc.h" 15 #include "xfs_iwalk.h" 16 #include "xfs_itable.h" 17 #include "xfs_error.h" 18 #include "xfs_da_format.h" 19 #include "xfs_da_btree.h" 20 #include "xfs_attr.h" 21 #include "xfs_bmap.h" 22 #include "xfs_bmap_util.h" 23 #include "xfs_fsops.h" 24 #include "xfs_discard.h" 25 #include "xfs_quota.h" 26 #include "xfs_export.h" 27 #include "xfs_trace.h" 28 #include "xfs_icache.h" 29 #include "xfs_trans.h" 30 #include "xfs_acl.h" 31 #include "xfs_btree.h" 32 #include <linux/fsmap.h> 33 #include "xfs_fsmap.h" 34 #include "scrub/xfs_scrub.h" 35 #include "xfs_sb.h" 36 #include "xfs_ag.h" 37 #include "xfs_health.h" 38 #include "xfs_reflink.h" 39 #include "xfs_ioctl.h" 40 #include "xfs_xattr.h" 41 42 #include <linux/mount.h> 43 #include <linux/namei.h> 44 #include <linux/fileattr.h> 45 46 /* 47 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 48 * a file or fs handle. 49 * 50 * XFS_IOC_PATH_TO_FSHANDLE 51 * returns fs handle for a mount point or path within that mount point 52 * XFS_IOC_FD_TO_HANDLE 53 * returns full handle for a FD opened in user space 54 * XFS_IOC_PATH_TO_HANDLE 55 * returns full handle for a path 56 */ 57 int 58 xfs_find_handle( 59 unsigned int cmd, 60 xfs_fsop_handlereq_t *hreq) 61 { 62 int hsize; 63 xfs_handle_t handle; 64 struct inode *inode; 65 struct fd f = {NULL}; 66 struct path path; 67 int error; 68 struct xfs_inode *ip; 69 70 if (cmd == XFS_IOC_FD_TO_HANDLE) { 71 f = fdget(hreq->fd); 72 if (!f.file) 73 return -EBADF; 74 inode = file_inode(f.file); 75 } else { 76 error = user_path_at(AT_FDCWD, hreq->path, 0, &path); 77 if (error) 78 return error; 79 inode = d_inode(path.dentry); 80 } 81 ip = XFS_I(inode); 82 83 /* 84 * We can only generate handles for inodes residing on a XFS filesystem, 85 * and only for regular files, directories or symbolic links. 86 */ 87 error = -EINVAL; 88 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 89 goto out_put; 90 91 error = -EBADF; 92 if (!S_ISREG(inode->i_mode) && 93 !S_ISDIR(inode->i_mode) && 94 !S_ISLNK(inode->i_mode)) 95 goto out_put; 96 97 98 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 99 100 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 101 /* 102 * This handle only contains an fsid, zero the rest. 103 */ 104 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 105 hsize = sizeof(xfs_fsid_t); 106 } else { 107 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 108 sizeof(handle.ha_fid.fid_len); 109 handle.ha_fid.fid_pad = 0; 110 handle.ha_fid.fid_gen = inode->i_generation; 111 handle.ha_fid.fid_ino = ip->i_ino; 112 hsize = sizeof(xfs_handle_t); 113 } 114 115 error = -EFAULT; 116 if (copy_to_user(hreq->ohandle, &handle, hsize) || 117 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 118 goto out_put; 119 120 error = 0; 121 122 out_put: 123 if (cmd == XFS_IOC_FD_TO_HANDLE) 124 fdput(f); 125 else 126 path_put(&path); 127 return error; 128 } 129 130 /* 131 * No need to do permission checks on the various pathname components 132 * as the handle operations are privileged. 133 */ 134 STATIC int 135 xfs_handle_acceptable( 136 void *context, 137 struct dentry *dentry) 138 { 139 return 1; 140 } 141 142 /* 143 * Convert userspace handle data into a dentry. 144 */ 145 struct dentry * 146 xfs_handle_to_dentry( 147 struct file *parfilp, 148 void __user *uhandle, 149 u32 hlen) 150 { 151 xfs_handle_t handle; 152 struct xfs_fid64 fid; 153 154 /* 155 * Only allow handle opens under a directory. 156 */ 157 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 158 return ERR_PTR(-ENOTDIR); 159 160 if (hlen != sizeof(xfs_handle_t)) 161 return ERR_PTR(-EINVAL); 162 if (copy_from_user(&handle, uhandle, hlen)) 163 return ERR_PTR(-EFAULT); 164 if (handle.ha_fid.fid_len != 165 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 166 return ERR_PTR(-EINVAL); 167 168 memset(&fid, 0, sizeof(struct fid)); 169 fid.ino = handle.ha_fid.fid_ino; 170 fid.gen = handle.ha_fid.fid_gen; 171 172 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 173 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 174 xfs_handle_acceptable, NULL); 175 } 176 177 STATIC struct dentry * 178 xfs_handlereq_to_dentry( 179 struct file *parfilp, 180 xfs_fsop_handlereq_t *hreq) 181 { 182 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 183 } 184 185 int 186 xfs_open_by_handle( 187 struct file *parfilp, 188 xfs_fsop_handlereq_t *hreq) 189 { 190 const struct cred *cred = current_cred(); 191 int error; 192 int fd; 193 int permflag; 194 struct file *filp; 195 struct inode *inode; 196 struct dentry *dentry; 197 fmode_t fmode; 198 struct path path; 199 200 if (!capable(CAP_SYS_ADMIN)) 201 return -EPERM; 202 203 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 204 if (IS_ERR(dentry)) 205 return PTR_ERR(dentry); 206 inode = d_inode(dentry); 207 208 /* Restrict xfs_open_by_handle to directories & regular files. */ 209 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 210 error = -EPERM; 211 goto out_dput; 212 } 213 214 #if BITS_PER_LONG != 32 215 hreq->oflags |= O_LARGEFILE; 216 #endif 217 218 permflag = hreq->oflags; 219 fmode = OPEN_FMODE(permflag); 220 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 221 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 222 error = -EPERM; 223 goto out_dput; 224 } 225 226 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 227 error = -EPERM; 228 goto out_dput; 229 } 230 231 /* Can't write directories. */ 232 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 233 error = -EISDIR; 234 goto out_dput; 235 } 236 237 fd = get_unused_fd_flags(0); 238 if (fd < 0) { 239 error = fd; 240 goto out_dput; 241 } 242 243 path.mnt = parfilp->f_path.mnt; 244 path.dentry = dentry; 245 filp = dentry_open(&path, hreq->oflags, cred); 246 dput(dentry); 247 if (IS_ERR(filp)) { 248 put_unused_fd(fd); 249 return PTR_ERR(filp); 250 } 251 252 if (S_ISREG(inode->i_mode)) { 253 filp->f_flags |= O_NOATIME; 254 filp->f_mode |= FMODE_NOCMTIME; 255 } 256 257 fd_install(fd, filp); 258 return fd; 259 260 out_dput: 261 dput(dentry); 262 return error; 263 } 264 265 int 266 xfs_readlink_by_handle( 267 struct file *parfilp, 268 xfs_fsop_handlereq_t *hreq) 269 { 270 struct dentry *dentry; 271 __u32 olen; 272 int error; 273 274 if (!capable(CAP_SYS_ADMIN)) 275 return -EPERM; 276 277 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 278 if (IS_ERR(dentry)) 279 return PTR_ERR(dentry); 280 281 /* Restrict this handle operation to symlinks only. */ 282 if (!d_is_symlink(dentry)) { 283 error = -EINVAL; 284 goto out_dput; 285 } 286 287 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 288 error = -EFAULT; 289 goto out_dput; 290 } 291 292 error = vfs_readlink(dentry, hreq->ohandle, olen); 293 294 out_dput: 295 dput(dentry); 296 return error; 297 } 298 299 /* 300 * Format an attribute and copy it out to the user's buffer. 301 * Take care to check values and protect against them changing later, 302 * we may be reading them directly out of a user buffer. 303 */ 304 static void 305 xfs_ioc_attr_put_listent( 306 struct xfs_attr_list_context *context, 307 int flags, 308 unsigned char *name, 309 int namelen, 310 int valuelen) 311 { 312 struct xfs_attrlist *alist = context->buffer; 313 struct xfs_attrlist_ent *aep; 314 int arraytop; 315 316 ASSERT(!context->seen_enough); 317 ASSERT(context->count >= 0); 318 ASSERT(context->count < (ATTR_MAX_VALUELEN/8)); 319 ASSERT(context->firstu >= sizeof(*alist)); 320 ASSERT(context->firstu <= context->bufsize); 321 322 /* 323 * Only list entries in the right namespace. 324 */ 325 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK)) 326 return; 327 328 arraytop = sizeof(*alist) + 329 context->count * sizeof(alist->al_offset[0]); 330 331 /* decrement by the actual bytes used by the attr */ 332 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) + 333 namelen + 1, sizeof(uint32_t)); 334 if (context->firstu < arraytop) { 335 trace_xfs_attr_list_full(context); 336 alist->al_more = 1; 337 context->seen_enough = 1; 338 return; 339 } 340 341 aep = context->buffer + context->firstu; 342 aep->a_valuelen = valuelen; 343 memcpy(aep->a_name, name, namelen); 344 aep->a_name[namelen] = 0; 345 alist->al_offset[context->count++] = context->firstu; 346 alist->al_count = context->count; 347 trace_xfs_attr_list_add(context); 348 } 349 350 static unsigned int 351 xfs_attr_filter( 352 u32 ioc_flags) 353 { 354 if (ioc_flags & XFS_IOC_ATTR_ROOT) 355 return XFS_ATTR_ROOT; 356 if (ioc_flags & XFS_IOC_ATTR_SECURE) 357 return XFS_ATTR_SECURE; 358 return 0; 359 } 360 361 static unsigned int 362 xfs_attr_flags( 363 u32 ioc_flags) 364 { 365 if (ioc_flags & XFS_IOC_ATTR_CREATE) 366 return XATTR_CREATE; 367 if (ioc_flags & XFS_IOC_ATTR_REPLACE) 368 return XATTR_REPLACE; 369 return 0; 370 } 371 372 int 373 xfs_ioc_attr_list( 374 struct xfs_inode *dp, 375 void __user *ubuf, 376 size_t bufsize, 377 int flags, 378 struct xfs_attrlist_cursor __user *ucursor) 379 { 380 struct xfs_attr_list_context context = { }; 381 struct xfs_attrlist *alist; 382 void *buffer; 383 int error; 384 385 if (bufsize < sizeof(struct xfs_attrlist) || 386 bufsize > XFS_XATTR_LIST_MAX) 387 return -EINVAL; 388 389 /* 390 * Reject flags, only allow namespaces. 391 */ 392 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE)) 393 return -EINVAL; 394 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE)) 395 return -EINVAL; 396 397 /* 398 * Validate the cursor. 399 */ 400 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor))) 401 return -EFAULT; 402 if (context.cursor.pad1 || context.cursor.pad2) 403 return -EINVAL; 404 if (!context.cursor.initted && 405 (context.cursor.hashval || context.cursor.blkno || 406 context.cursor.offset)) 407 return -EINVAL; 408 409 buffer = kvzalloc(bufsize, GFP_KERNEL); 410 if (!buffer) 411 return -ENOMEM; 412 413 /* 414 * Initialize the output buffer. 415 */ 416 context.dp = dp; 417 context.resynch = 1; 418 context.attr_filter = xfs_attr_filter(flags); 419 context.buffer = buffer; 420 context.bufsize = round_down(bufsize, sizeof(uint32_t)); 421 context.firstu = context.bufsize; 422 context.put_listent = xfs_ioc_attr_put_listent; 423 424 alist = context.buffer; 425 alist->al_count = 0; 426 alist->al_more = 0; 427 alist->al_offset[0] = context.bufsize; 428 429 error = xfs_attr_list(&context); 430 if (error) 431 goto out_free; 432 433 if (copy_to_user(ubuf, buffer, bufsize) || 434 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor))) 435 error = -EFAULT; 436 out_free: 437 kmem_free(buffer); 438 return error; 439 } 440 441 STATIC int 442 xfs_attrlist_by_handle( 443 struct file *parfilp, 444 struct xfs_fsop_attrlist_handlereq __user *p) 445 { 446 struct xfs_fsop_attrlist_handlereq al_hreq; 447 struct dentry *dentry; 448 int error = -ENOMEM; 449 450 if (!capable(CAP_SYS_ADMIN)) 451 return -EPERM; 452 if (copy_from_user(&al_hreq, p, sizeof(al_hreq))) 453 return -EFAULT; 454 455 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 456 if (IS_ERR(dentry)) 457 return PTR_ERR(dentry); 458 459 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer, 460 al_hreq.buflen, al_hreq.flags, &p->pos); 461 dput(dentry); 462 return error; 463 } 464 465 static int 466 xfs_attrmulti_attr_get( 467 struct inode *inode, 468 unsigned char *name, 469 unsigned char __user *ubuf, 470 uint32_t *len, 471 uint32_t flags) 472 { 473 struct xfs_da_args args = { 474 .dp = XFS_I(inode), 475 .attr_filter = xfs_attr_filter(flags), 476 .attr_flags = xfs_attr_flags(flags), 477 .name = name, 478 .namelen = strlen(name), 479 .valuelen = *len, 480 }; 481 int error; 482 483 if (*len > XFS_XATTR_SIZE_MAX) 484 return -EINVAL; 485 486 error = xfs_attr_get(&args); 487 if (error) 488 goto out_kfree; 489 490 *len = args.valuelen; 491 if (copy_to_user(ubuf, args.value, args.valuelen)) 492 error = -EFAULT; 493 494 out_kfree: 495 kmem_free(args.value); 496 return error; 497 } 498 499 static int 500 xfs_attrmulti_attr_set( 501 struct inode *inode, 502 unsigned char *name, 503 const unsigned char __user *ubuf, 504 uint32_t len, 505 uint32_t flags) 506 { 507 struct xfs_da_args args = { 508 .dp = XFS_I(inode), 509 .attr_filter = xfs_attr_filter(flags), 510 .attr_flags = xfs_attr_flags(flags), 511 .name = name, 512 .namelen = strlen(name), 513 }; 514 int error; 515 516 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 517 return -EPERM; 518 519 if (ubuf) { 520 if (len > XFS_XATTR_SIZE_MAX) 521 return -EINVAL; 522 args.value = memdup_user(ubuf, len); 523 if (IS_ERR(args.value)) 524 return PTR_ERR(args.value); 525 args.valuelen = len; 526 } 527 528 error = xfs_attr_change(&args); 529 if (!error && (flags & XFS_IOC_ATTR_ROOT)) 530 xfs_forget_acl(inode, name); 531 kfree(args.value); 532 return error; 533 } 534 535 int 536 xfs_ioc_attrmulti_one( 537 struct file *parfilp, 538 struct inode *inode, 539 uint32_t opcode, 540 void __user *uname, 541 void __user *value, 542 uint32_t *len, 543 uint32_t flags) 544 { 545 unsigned char *name; 546 int error; 547 548 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE)) 549 return -EINVAL; 550 551 name = strndup_user(uname, MAXNAMELEN); 552 if (IS_ERR(name)) 553 return PTR_ERR(name); 554 555 switch (opcode) { 556 case ATTR_OP_GET: 557 error = xfs_attrmulti_attr_get(inode, name, value, len, flags); 558 break; 559 case ATTR_OP_REMOVE: 560 value = NULL; 561 *len = 0; 562 fallthrough; 563 case ATTR_OP_SET: 564 error = mnt_want_write_file(parfilp); 565 if (error) 566 break; 567 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags); 568 mnt_drop_write_file(parfilp); 569 break; 570 default: 571 error = -EINVAL; 572 break; 573 } 574 575 kfree(name); 576 return error; 577 } 578 579 STATIC int 580 xfs_attrmulti_by_handle( 581 struct file *parfilp, 582 void __user *arg) 583 { 584 int error; 585 xfs_attr_multiop_t *ops; 586 xfs_fsop_attrmulti_handlereq_t am_hreq; 587 struct dentry *dentry; 588 unsigned int i, size; 589 590 if (!capable(CAP_SYS_ADMIN)) 591 return -EPERM; 592 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 593 return -EFAULT; 594 595 /* overflow check */ 596 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 597 return -E2BIG; 598 599 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 600 if (IS_ERR(dentry)) 601 return PTR_ERR(dentry); 602 603 error = -E2BIG; 604 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 605 if (!size || size > 16 * PAGE_SIZE) 606 goto out_dput; 607 608 ops = memdup_user(am_hreq.ops, size); 609 if (IS_ERR(ops)) { 610 error = PTR_ERR(ops); 611 goto out_dput; 612 } 613 614 error = 0; 615 for (i = 0; i < am_hreq.opcount; i++) { 616 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp, 617 d_inode(dentry), ops[i].am_opcode, 618 ops[i].am_attrname, ops[i].am_attrvalue, 619 &ops[i].am_length, ops[i].am_flags); 620 } 621 622 if (copy_to_user(am_hreq.ops, ops, size)) 623 error = -EFAULT; 624 625 kfree(ops); 626 out_dput: 627 dput(dentry); 628 return error; 629 } 630 631 /* Return 0 on success or positive error */ 632 int 633 xfs_fsbulkstat_one_fmt( 634 struct xfs_ibulk *breq, 635 const struct xfs_bulkstat *bstat) 636 { 637 struct xfs_bstat bs1; 638 639 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat); 640 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1))) 641 return -EFAULT; 642 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat)); 643 } 644 645 int 646 xfs_fsinumbers_fmt( 647 struct xfs_ibulk *breq, 648 const struct xfs_inumbers *igrp) 649 { 650 struct xfs_inogrp ig1; 651 652 xfs_inumbers_to_inogrp(&ig1, igrp); 653 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp))) 654 return -EFAULT; 655 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp)); 656 } 657 658 STATIC int 659 xfs_ioc_fsbulkstat( 660 struct file *file, 661 unsigned int cmd, 662 void __user *arg) 663 { 664 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount; 665 struct xfs_fsop_bulkreq bulkreq; 666 struct xfs_ibulk breq = { 667 .mp = mp, 668 .idmap = file_mnt_idmap(file), 669 .ocount = 0, 670 }; 671 xfs_ino_t lastino; 672 int error; 673 674 /* done = 1 if there are more stats to get and if bulkstat */ 675 /* should be called again (unused here, but used in dmapi) */ 676 677 if (!capable(CAP_SYS_ADMIN)) 678 return -EPERM; 679 680 if (xfs_is_shutdown(mp)) 681 return -EIO; 682 683 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq))) 684 return -EFAULT; 685 686 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64))) 687 return -EFAULT; 688 689 if (bulkreq.icount <= 0) 690 return -EINVAL; 691 692 if (bulkreq.ubuffer == NULL) 693 return -EINVAL; 694 695 breq.ubuffer = bulkreq.ubuffer; 696 breq.icount = bulkreq.icount; 697 698 /* 699 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number 700 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect 701 * that *lastip contains either zero or the number of the last inode to 702 * be examined by the previous call and return results starting with 703 * the next inode after that. The new bulk request back end functions 704 * take the inode to start with, so we have to compute the startino 705 * parameter from lastino to maintain correct function. lastino == 0 706 * is a special case because it has traditionally meant "first inode 707 * in filesystem". 708 */ 709 if (cmd == XFS_IOC_FSINUMBERS) { 710 breq.startino = lastino ? lastino + 1 : 0; 711 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt); 712 lastino = breq.startino - 1; 713 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) { 714 breq.startino = lastino; 715 breq.icount = 1; 716 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt); 717 } else { /* XFS_IOC_FSBULKSTAT */ 718 breq.startino = lastino ? lastino + 1 : 0; 719 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt); 720 lastino = breq.startino - 1; 721 } 722 723 if (error) 724 return error; 725 726 if (bulkreq.lastip != NULL && 727 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t))) 728 return -EFAULT; 729 730 if (bulkreq.ocount != NULL && 731 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32))) 732 return -EFAULT; 733 734 return 0; 735 } 736 737 /* Return 0 on success or positive error */ 738 static int 739 xfs_bulkstat_fmt( 740 struct xfs_ibulk *breq, 741 const struct xfs_bulkstat *bstat) 742 { 743 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat))) 744 return -EFAULT; 745 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat)); 746 } 747 748 /* 749 * Check the incoming bulk request @hdr from userspace and initialize the 750 * internal @breq bulk request appropriately. Returns 0 if the bulk request 751 * should proceed; -ECANCELED if there's nothing to do; or the usual 752 * negative error code. 753 */ 754 static int 755 xfs_bulk_ireq_setup( 756 struct xfs_mount *mp, 757 const struct xfs_bulk_ireq *hdr, 758 struct xfs_ibulk *breq, 759 void __user *ubuffer) 760 { 761 if (hdr->icount == 0 || 762 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) || 763 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) 764 return -EINVAL; 765 766 breq->startino = hdr->ino; 767 breq->ubuffer = ubuffer; 768 breq->icount = hdr->icount; 769 breq->ocount = 0; 770 breq->flags = 0; 771 772 /* 773 * The @ino parameter is a special value, so we must look it up here. 774 * We're not allowed to have IREQ_AGNO, and we only return one inode 775 * worth of data. 776 */ 777 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) { 778 if (hdr->flags & XFS_BULK_IREQ_AGNO) 779 return -EINVAL; 780 781 switch (hdr->ino) { 782 case XFS_BULK_IREQ_SPECIAL_ROOT: 783 breq->startino = mp->m_sb.sb_rootino; 784 break; 785 default: 786 return -EINVAL; 787 } 788 breq->icount = 1; 789 } 790 791 /* 792 * The IREQ_AGNO flag means that we only want results from a given AG. 793 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is 794 * beyond the specified AG then we return no results. 795 */ 796 if (hdr->flags & XFS_BULK_IREQ_AGNO) { 797 if (hdr->agno >= mp->m_sb.sb_agcount) 798 return -EINVAL; 799 800 if (breq->startino == 0) 801 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0); 802 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno) 803 return -EINVAL; 804 805 breq->flags |= XFS_IBULK_SAME_AG; 806 807 /* Asking for an inode past the end of the AG? We're done! */ 808 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno) 809 return -ECANCELED; 810 } else if (hdr->agno) 811 return -EINVAL; 812 813 /* Asking for an inode past the end of the FS? We're done! */ 814 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount) 815 return -ECANCELED; 816 817 if (hdr->flags & XFS_BULK_IREQ_NREXT64) 818 breq->flags |= XFS_IBULK_NREXT64; 819 820 return 0; 821 } 822 823 /* 824 * Update the userspace bulk request @hdr to reflect the end state of the 825 * internal bulk request @breq. 826 */ 827 static void 828 xfs_bulk_ireq_teardown( 829 struct xfs_bulk_ireq *hdr, 830 struct xfs_ibulk *breq) 831 { 832 hdr->ino = breq->startino; 833 hdr->ocount = breq->ocount; 834 } 835 836 /* Handle the v5 bulkstat ioctl. */ 837 STATIC int 838 xfs_ioc_bulkstat( 839 struct file *file, 840 unsigned int cmd, 841 struct xfs_bulkstat_req __user *arg) 842 { 843 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount; 844 struct xfs_bulk_ireq hdr; 845 struct xfs_ibulk breq = { 846 .mp = mp, 847 .idmap = file_mnt_idmap(file), 848 }; 849 int error; 850 851 if (!capable(CAP_SYS_ADMIN)) 852 return -EPERM; 853 854 if (xfs_is_shutdown(mp)) 855 return -EIO; 856 857 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 858 return -EFAULT; 859 860 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat); 861 if (error == -ECANCELED) 862 goto out_teardown; 863 if (error < 0) 864 return error; 865 866 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt); 867 if (error) 868 return error; 869 870 out_teardown: 871 xfs_bulk_ireq_teardown(&hdr, &breq); 872 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 873 return -EFAULT; 874 875 return 0; 876 } 877 878 STATIC int 879 xfs_inumbers_fmt( 880 struct xfs_ibulk *breq, 881 const struct xfs_inumbers *igrp) 882 { 883 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers))) 884 return -EFAULT; 885 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers)); 886 } 887 888 /* Handle the v5 inumbers ioctl. */ 889 STATIC int 890 xfs_ioc_inumbers( 891 struct xfs_mount *mp, 892 unsigned int cmd, 893 struct xfs_inumbers_req __user *arg) 894 { 895 struct xfs_bulk_ireq hdr; 896 struct xfs_ibulk breq = { 897 .mp = mp, 898 }; 899 int error; 900 901 if (!capable(CAP_SYS_ADMIN)) 902 return -EPERM; 903 904 if (xfs_is_shutdown(mp)) 905 return -EIO; 906 907 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 908 return -EFAULT; 909 910 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers); 911 if (error == -ECANCELED) 912 goto out_teardown; 913 if (error < 0) 914 return error; 915 916 error = xfs_inumbers(&breq, xfs_inumbers_fmt); 917 if (error) 918 return error; 919 920 out_teardown: 921 xfs_bulk_ireq_teardown(&hdr, &breq); 922 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 923 return -EFAULT; 924 925 return 0; 926 } 927 928 STATIC int 929 xfs_ioc_fsgeometry( 930 struct xfs_mount *mp, 931 void __user *arg, 932 int struct_version) 933 { 934 struct xfs_fsop_geom fsgeo; 935 size_t len; 936 937 xfs_fs_geometry(mp, &fsgeo, struct_version); 938 939 if (struct_version <= 3) 940 len = sizeof(struct xfs_fsop_geom_v1); 941 else if (struct_version == 4) 942 len = sizeof(struct xfs_fsop_geom_v4); 943 else { 944 xfs_fsop_geom_health(mp, &fsgeo); 945 len = sizeof(fsgeo); 946 } 947 948 if (copy_to_user(arg, &fsgeo, len)) 949 return -EFAULT; 950 return 0; 951 } 952 953 STATIC int 954 xfs_ioc_ag_geometry( 955 struct xfs_mount *mp, 956 void __user *arg) 957 { 958 struct xfs_perag *pag; 959 struct xfs_ag_geometry ageo; 960 int error; 961 962 if (copy_from_user(&ageo, arg, sizeof(ageo))) 963 return -EFAULT; 964 if (ageo.ag_flags) 965 return -EINVAL; 966 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved))) 967 return -EINVAL; 968 969 pag = xfs_perag_get(mp, ageo.ag_number); 970 if (!pag) 971 return -EINVAL; 972 973 error = xfs_ag_get_geometry(pag, &ageo); 974 xfs_perag_put(pag); 975 if (error) 976 return error; 977 978 if (copy_to_user(arg, &ageo, sizeof(ageo))) 979 return -EFAULT; 980 return 0; 981 } 982 983 /* 984 * Linux extended inode flags interface. 985 */ 986 987 static void 988 xfs_fill_fsxattr( 989 struct xfs_inode *ip, 990 int whichfork, 991 struct fileattr *fa) 992 { 993 struct xfs_mount *mp = ip->i_mount; 994 struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork); 995 996 fileattr_fill_xflags(fa, xfs_ip2xflags(ip)); 997 998 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) { 999 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize); 1000 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) { 1001 /* 1002 * Don't let a misaligned extent size hint on a directory 1003 * escape to userspace if it won't pass the setattr checks 1004 * later. 1005 */ 1006 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) && 1007 ip->i_extsize % mp->m_sb.sb_rextsize > 0) { 1008 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | 1009 FS_XFLAG_EXTSZINHERIT); 1010 fa->fsx_extsize = 0; 1011 } else { 1012 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize); 1013 } 1014 } 1015 1016 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) 1017 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize); 1018 fa->fsx_projid = ip->i_projid; 1019 if (ifp && !xfs_need_iread_extents(ifp)) 1020 fa->fsx_nextents = xfs_iext_count(ifp); 1021 else 1022 fa->fsx_nextents = xfs_ifork_nextents(ifp); 1023 } 1024 1025 STATIC int 1026 xfs_ioc_fsgetxattra( 1027 xfs_inode_t *ip, 1028 void __user *arg) 1029 { 1030 struct fileattr fa; 1031 1032 xfs_ilock(ip, XFS_ILOCK_SHARED); 1033 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa); 1034 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1035 1036 return copy_fsxattr_to_user(&fa, arg); 1037 } 1038 1039 int 1040 xfs_fileattr_get( 1041 struct dentry *dentry, 1042 struct fileattr *fa) 1043 { 1044 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 1045 1046 if (d_is_special(dentry)) 1047 return -ENOTTY; 1048 1049 xfs_ilock(ip, XFS_ILOCK_SHARED); 1050 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa); 1051 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1052 1053 return 0; 1054 } 1055 1056 STATIC uint16_t 1057 xfs_flags2diflags( 1058 struct xfs_inode *ip, 1059 unsigned int xflags) 1060 { 1061 /* can't set PREALLOC this way, just preserve it */ 1062 uint16_t di_flags = 1063 (ip->i_diflags & XFS_DIFLAG_PREALLOC); 1064 1065 if (xflags & FS_XFLAG_IMMUTABLE) 1066 di_flags |= XFS_DIFLAG_IMMUTABLE; 1067 if (xflags & FS_XFLAG_APPEND) 1068 di_flags |= XFS_DIFLAG_APPEND; 1069 if (xflags & FS_XFLAG_SYNC) 1070 di_flags |= XFS_DIFLAG_SYNC; 1071 if (xflags & FS_XFLAG_NOATIME) 1072 di_flags |= XFS_DIFLAG_NOATIME; 1073 if (xflags & FS_XFLAG_NODUMP) 1074 di_flags |= XFS_DIFLAG_NODUMP; 1075 if (xflags & FS_XFLAG_NODEFRAG) 1076 di_flags |= XFS_DIFLAG_NODEFRAG; 1077 if (xflags & FS_XFLAG_FILESTREAM) 1078 di_flags |= XFS_DIFLAG_FILESTREAM; 1079 if (S_ISDIR(VFS_I(ip)->i_mode)) { 1080 if (xflags & FS_XFLAG_RTINHERIT) 1081 di_flags |= XFS_DIFLAG_RTINHERIT; 1082 if (xflags & FS_XFLAG_NOSYMLINKS) 1083 di_flags |= XFS_DIFLAG_NOSYMLINKS; 1084 if (xflags & FS_XFLAG_EXTSZINHERIT) 1085 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 1086 if (xflags & FS_XFLAG_PROJINHERIT) 1087 di_flags |= XFS_DIFLAG_PROJINHERIT; 1088 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 1089 if (xflags & FS_XFLAG_REALTIME) 1090 di_flags |= XFS_DIFLAG_REALTIME; 1091 if (xflags & FS_XFLAG_EXTSIZE) 1092 di_flags |= XFS_DIFLAG_EXTSIZE; 1093 } 1094 1095 return di_flags; 1096 } 1097 1098 STATIC uint64_t 1099 xfs_flags2diflags2( 1100 struct xfs_inode *ip, 1101 unsigned int xflags) 1102 { 1103 uint64_t di_flags2 = 1104 (ip->i_diflags2 & (XFS_DIFLAG2_REFLINK | 1105 XFS_DIFLAG2_BIGTIME | 1106 XFS_DIFLAG2_NREXT64)); 1107 1108 if (xflags & FS_XFLAG_DAX) 1109 di_flags2 |= XFS_DIFLAG2_DAX; 1110 if (xflags & FS_XFLAG_COWEXTSIZE) 1111 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 1112 1113 return di_flags2; 1114 } 1115 1116 static int 1117 xfs_ioctl_setattr_xflags( 1118 struct xfs_trans *tp, 1119 struct xfs_inode *ip, 1120 struct fileattr *fa) 1121 { 1122 struct xfs_mount *mp = ip->i_mount; 1123 uint64_t i_flags2; 1124 1125 /* Can't change realtime flag if any extents are allocated. */ 1126 if ((ip->i_df.if_nextents || ip->i_delayed_blks) && 1127 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1128 return -EINVAL; 1129 1130 /* If realtime flag is set then must have realtime device */ 1131 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1132 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1133 (ip->i_extsize % mp->m_sb.sb_rextsize)) 1134 return -EINVAL; 1135 } 1136 1137 /* Clear reflink if we are actually able to set the rt flag. */ 1138 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1139 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK; 1140 1141 /* diflags2 only valid for v3 inodes. */ 1142 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1143 if (i_flags2 && !xfs_has_v3inodes(mp)) 1144 return -EINVAL; 1145 1146 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 1147 ip->i_diflags2 = i_flags2; 1148 1149 xfs_diflags_to_iflags(ip, false); 1150 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1151 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1152 XFS_STATS_INC(mp, xs_ig_attrchg); 1153 return 0; 1154 } 1155 1156 static void 1157 xfs_ioctl_setattr_prepare_dax( 1158 struct xfs_inode *ip, 1159 struct fileattr *fa) 1160 { 1161 struct xfs_mount *mp = ip->i_mount; 1162 struct inode *inode = VFS_I(ip); 1163 1164 if (S_ISDIR(inode->i_mode)) 1165 return; 1166 1167 if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp)) 1168 return; 1169 1170 if (((fa->fsx_xflags & FS_XFLAG_DAX) && 1171 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) || 1172 (!(fa->fsx_xflags & FS_XFLAG_DAX) && 1173 (ip->i_diflags2 & XFS_DIFLAG2_DAX))) 1174 d_mark_dontcache(inode); 1175 } 1176 1177 /* 1178 * Set up the transaction structure for the setattr operation, checking that we 1179 * have permission to do so. On success, return a clean transaction and the 1180 * inode locked exclusively ready for further operation specific checks. On 1181 * failure, return an error without modifying or locking the inode. 1182 */ 1183 static struct xfs_trans * 1184 xfs_ioctl_setattr_get_trans( 1185 struct xfs_inode *ip, 1186 struct xfs_dquot *pdqp) 1187 { 1188 struct xfs_mount *mp = ip->i_mount; 1189 struct xfs_trans *tp; 1190 int error = -EROFS; 1191 1192 if (xfs_is_readonly(mp)) 1193 goto out_error; 1194 error = -EIO; 1195 if (xfs_is_shutdown(mp)) 1196 goto out_error; 1197 1198 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp, 1199 has_capability_noaudit(current, CAP_FOWNER), &tp); 1200 if (error) 1201 goto out_error; 1202 1203 if (xfs_has_wsync(mp)) 1204 xfs_trans_set_sync(tp); 1205 1206 return tp; 1207 1208 out_error: 1209 return ERR_PTR(error); 1210 } 1211 1212 /* 1213 * Validate a proposed extent size hint. For regular files, the hint can only 1214 * be changed if no extents are allocated. 1215 */ 1216 static int 1217 xfs_ioctl_setattr_check_extsize( 1218 struct xfs_inode *ip, 1219 struct fileattr *fa) 1220 { 1221 struct xfs_mount *mp = ip->i_mount; 1222 xfs_failaddr_t failaddr; 1223 uint16_t new_diflags; 1224 1225 if (!fa->fsx_valid) 1226 return 0; 1227 1228 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents && 1229 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize) 1230 return -EINVAL; 1231 1232 if (fa->fsx_extsize & mp->m_blockmask) 1233 return -EINVAL; 1234 1235 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 1236 1237 /* 1238 * Inode verifiers do not check that the extent size hint is an integer 1239 * multiple of the rt extent size on a directory with both rtinherit 1240 * and extszinherit flags set. Don't let sysadmins misconfigure 1241 * directories. 1242 */ 1243 if ((new_diflags & XFS_DIFLAG_RTINHERIT) && 1244 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) { 1245 unsigned int rtextsize_bytes; 1246 1247 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize); 1248 if (fa->fsx_extsize % rtextsize_bytes) 1249 return -EINVAL; 1250 } 1251 1252 failaddr = xfs_inode_validate_extsize(ip->i_mount, 1253 XFS_B_TO_FSB(mp, fa->fsx_extsize), 1254 VFS_I(ip)->i_mode, new_diflags); 1255 return failaddr != NULL ? -EINVAL : 0; 1256 } 1257 1258 static int 1259 xfs_ioctl_setattr_check_cowextsize( 1260 struct xfs_inode *ip, 1261 struct fileattr *fa) 1262 { 1263 struct xfs_mount *mp = ip->i_mount; 1264 xfs_failaddr_t failaddr; 1265 uint64_t new_diflags2; 1266 uint16_t new_diflags; 1267 1268 if (!fa->fsx_valid) 1269 return 0; 1270 1271 if (fa->fsx_cowextsize & mp->m_blockmask) 1272 return -EINVAL; 1273 1274 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags); 1275 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1276 1277 failaddr = xfs_inode_validate_cowextsize(ip->i_mount, 1278 XFS_B_TO_FSB(mp, fa->fsx_cowextsize), 1279 VFS_I(ip)->i_mode, new_diflags, new_diflags2); 1280 return failaddr != NULL ? -EINVAL : 0; 1281 } 1282 1283 static int 1284 xfs_ioctl_setattr_check_projid( 1285 struct xfs_inode *ip, 1286 struct fileattr *fa) 1287 { 1288 if (!fa->fsx_valid) 1289 return 0; 1290 1291 /* Disallow 32bit project ids if 32bit IDs are not enabled. */ 1292 if (fa->fsx_projid > (uint16_t)-1 && 1293 !xfs_has_projid32(ip->i_mount)) 1294 return -EINVAL; 1295 return 0; 1296 } 1297 1298 int 1299 xfs_fileattr_set( 1300 struct mnt_idmap *idmap, 1301 struct dentry *dentry, 1302 struct fileattr *fa) 1303 { 1304 struct xfs_inode *ip = XFS_I(d_inode(dentry)); 1305 struct xfs_mount *mp = ip->i_mount; 1306 struct xfs_trans *tp; 1307 struct xfs_dquot *pdqp = NULL; 1308 struct xfs_dquot *olddquot = NULL; 1309 int error; 1310 1311 trace_xfs_ioctl_setattr(ip); 1312 1313 if (d_is_special(dentry)) 1314 return -ENOTTY; 1315 1316 if (!fa->fsx_valid) { 1317 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | 1318 FS_NOATIME_FL | FS_NODUMP_FL | 1319 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL)) 1320 return -EOPNOTSUPP; 1321 } 1322 1323 error = xfs_ioctl_setattr_check_projid(ip, fa); 1324 if (error) 1325 return error; 1326 1327 /* 1328 * If disk quotas is on, we make sure that the dquots do exist on disk, 1329 * before we start any other transactions. Trying to do this later 1330 * is messy. We don't care to take a readlock to look at the ids 1331 * in inode here, because we can't hold it across the trans_reserve. 1332 * If the IDs do change before we take the ilock, we're covered 1333 * because the i_*dquot fields will get updated anyway. 1334 */ 1335 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) { 1336 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid, 1337 VFS_I(ip)->i_gid, fa->fsx_projid, 1338 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp); 1339 if (error) 1340 return error; 1341 } 1342 1343 xfs_ioctl_setattr_prepare_dax(ip, fa); 1344 1345 tp = xfs_ioctl_setattr_get_trans(ip, pdqp); 1346 if (IS_ERR(tp)) { 1347 error = PTR_ERR(tp); 1348 goto error_free_dquots; 1349 } 1350 1351 error = xfs_ioctl_setattr_check_extsize(ip, fa); 1352 if (error) 1353 goto error_trans_cancel; 1354 1355 error = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1356 if (error) 1357 goto error_trans_cancel; 1358 1359 error = xfs_ioctl_setattr_xflags(tp, ip, fa); 1360 if (error) 1361 goto error_trans_cancel; 1362 1363 if (!fa->fsx_valid) 1364 goto skip_xattr; 1365 /* 1366 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1367 * overrides the following restrictions: 1368 * 1369 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1370 * successful return from chown() 1371 */ 1372 1373 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1374 !capable_wrt_inode_uidgid(idmap, VFS_I(ip), CAP_FSETID)) 1375 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1376 1377 /* Change the ownerships and register project quota modifications */ 1378 if (ip->i_projid != fa->fsx_projid) { 1379 if (XFS_IS_PQUOTA_ON(mp)) { 1380 olddquot = xfs_qm_vop_chown(tp, ip, 1381 &ip->i_pdquot, pdqp); 1382 } 1383 ip->i_projid = fa->fsx_projid; 1384 } 1385 1386 /* 1387 * Only set the extent size hint if we've already determined that the 1388 * extent size hint should be set on the inode. If no extent size flags 1389 * are set on the inode then unconditionally clear the extent size hint. 1390 */ 1391 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1392 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1393 else 1394 ip->i_extsize = 0; 1395 1396 if (xfs_has_v3inodes(mp)) { 1397 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) 1398 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1399 else 1400 ip->i_cowextsize = 0; 1401 } 1402 1403 skip_xattr: 1404 error = xfs_trans_commit(tp); 1405 1406 /* 1407 * Release any dquot(s) the inode had kept before chown. 1408 */ 1409 xfs_qm_dqrele(olddquot); 1410 xfs_qm_dqrele(pdqp); 1411 1412 return error; 1413 1414 error_trans_cancel: 1415 xfs_trans_cancel(tp); 1416 error_free_dquots: 1417 xfs_qm_dqrele(pdqp); 1418 return error; 1419 } 1420 1421 static bool 1422 xfs_getbmap_format( 1423 struct kgetbmap *p, 1424 struct getbmapx __user *u, 1425 size_t recsize) 1426 { 1427 if (put_user(p->bmv_offset, &u->bmv_offset) || 1428 put_user(p->bmv_block, &u->bmv_block) || 1429 put_user(p->bmv_length, &u->bmv_length) || 1430 put_user(0, &u->bmv_count) || 1431 put_user(0, &u->bmv_entries)) 1432 return false; 1433 if (recsize < sizeof(struct getbmapx)) 1434 return true; 1435 if (put_user(0, &u->bmv_iflags) || 1436 put_user(p->bmv_oflags, &u->bmv_oflags) || 1437 put_user(0, &u->bmv_unused1) || 1438 put_user(0, &u->bmv_unused2)) 1439 return false; 1440 return true; 1441 } 1442 1443 STATIC int 1444 xfs_ioc_getbmap( 1445 struct file *file, 1446 unsigned int cmd, 1447 void __user *arg) 1448 { 1449 struct getbmapx bmx = { 0 }; 1450 struct kgetbmap *buf; 1451 size_t recsize; 1452 int error, i; 1453 1454 switch (cmd) { 1455 case XFS_IOC_GETBMAPA: 1456 bmx.bmv_iflags = BMV_IF_ATTRFORK; 1457 fallthrough; 1458 case XFS_IOC_GETBMAP: 1459 /* struct getbmap is a strict subset of struct getbmapx. */ 1460 recsize = sizeof(struct getbmap); 1461 break; 1462 case XFS_IOC_GETBMAPX: 1463 recsize = sizeof(struct getbmapx); 1464 break; 1465 default: 1466 return -EINVAL; 1467 } 1468 1469 if (copy_from_user(&bmx, arg, recsize)) 1470 return -EFAULT; 1471 1472 if (bmx.bmv_count < 2) 1473 return -EINVAL; 1474 if (bmx.bmv_count >= INT_MAX / recsize) 1475 return -ENOMEM; 1476 1477 buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL); 1478 if (!buf) 1479 return -ENOMEM; 1480 1481 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 1482 if (error) 1483 goto out_free_buf; 1484 1485 error = -EFAULT; 1486 if (copy_to_user(arg, &bmx, recsize)) 1487 goto out_free_buf; 1488 arg += recsize; 1489 1490 for (i = 0; i < bmx.bmv_entries; i++) { 1491 if (!xfs_getbmap_format(buf + i, arg, recsize)) 1492 goto out_free_buf; 1493 arg += recsize; 1494 } 1495 1496 error = 0; 1497 out_free_buf: 1498 kmem_free(buf); 1499 return error; 1500 } 1501 1502 STATIC int 1503 xfs_ioc_getfsmap( 1504 struct xfs_inode *ip, 1505 struct fsmap_head __user *arg) 1506 { 1507 struct xfs_fsmap_head xhead = {0}; 1508 struct fsmap_head head; 1509 struct fsmap *recs; 1510 unsigned int count; 1511 __u32 last_flags = 0; 1512 bool done = false; 1513 int error; 1514 1515 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1516 return -EFAULT; 1517 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1518 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1519 sizeof(head.fmh_keys[0].fmr_reserved)) || 1520 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1521 sizeof(head.fmh_keys[1].fmr_reserved))) 1522 return -EINVAL; 1523 1524 /* 1525 * Use an internal memory buffer so that we don't have to copy fsmap 1526 * data to userspace while holding locks. Start by trying to allocate 1527 * up to 128k for the buffer, but fall back to a single page if needed. 1528 */ 1529 count = min_t(unsigned int, head.fmh_count, 1530 131072 / sizeof(struct fsmap)); 1531 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL); 1532 if (!recs) { 1533 count = min_t(unsigned int, head.fmh_count, 1534 PAGE_SIZE / sizeof(struct fsmap)); 1535 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL); 1536 if (!recs) 1537 return -ENOMEM; 1538 } 1539 1540 xhead.fmh_iflags = head.fmh_iflags; 1541 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1542 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1543 1544 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1545 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1546 1547 head.fmh_entries = 0; 1548 do { 1549 struct fsmap __user *user_recs; 1550 struct fsmap *last_rec; 1551 1552 user_recs = &arg->fmh_recs[head.fmh_entries]; 1553 xhead.fmh_entries = 0; 1554 xhead.fmh_count = min_t(unsigned int, count, 1555 head.fmh_count - head.fmh_entries); 1556 1557 /* Run query, record how many entries we got. */ 1558 error = xfs_getfsmap(ip->i_mount, &xhead, recs); 1559 switch (error) { 1560 case 0: 1561 /* 1562 * There are no more records in the result set. Copy 1563 * whatever we got to userspace and break out. 1564 */ 1565 done = true; 1566 break; 1567 case -ECANCELED: 1568 /* 1569 * The internal memory buffer is full. Copy whatever 1570 * records we got to userspace and go again if we have 1571 * not yet filled the userspace buffer. 1572 */ 1573 error = 0; 1574 break; 1575 default: 1576 goto out_free; 1577 } 1578 head.fmh_entries += xhead.fmh_entries; 1579 head.fmh_oflags = xhead.fmh_oflags; 1580 1581 /* 1582 * If the caller wanted a record count or there aren't any 1583 * new records to return, we're done. 1584 */ 1585 if (head.fmh_count == 0 || xhead.fmh_entries == 0) 1586 break; 1587 1588 /* Copy all the records we got out to userspace. */ 1589 if (copy_to_user(user_recs, recs, 1590 xhead.fmh_entries * sizeof(struct fsmap))) { 1591 error = -EFAULT; 1592 goto out_free; 1593 } 1594 1595 /* Remember the last record flags we copied to userspace. */ 1596 last_rec = &recs[xhead.fmh_entries - 1]; 1597 last_flags = last_rec->fmr_flags; 1598 1599 /* Set up the low key for the next iteration. */ 1600 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec); 1601 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1602 } while (!done && head.fmh_entries < head.fmh_count); 1603 1604 /* 1605 * If there are no more records in the query result set and we're not 1606 * in counting mode, mark the last record returned with the LAST flag. 1607 */ 1608 if (done && head.fmh_count > 0 && head.fmh_entries > 0) { 1609 struct fsmap __user *user_rec; 1610 1611 last_flags |= FMR_OF_LAST; 1612 user_rec = &arg->fmh_recs[head.fmh_entries - 1]; 1613 1614 if (copy_to_user(&user_rec->fmr_flags, &last_flags, 1615 sizeof(last_flags))) { 1616 error = -EFAULT; 1617 goto out_free; 1618 } 1619 } 1620 1621 /* copy back header */ 1622 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) { 1623 error = -EFAULT; 1624 goto out_free; 1625 } 1626 1627 out_free: 1628 kmem_free(recs); 1629 return error; 1630 } 1631 1632 STATIC int 1633 xfs_ioc_scrub_metadata( 1634 struct file *file, 1635 void __user *arg) 1636 { 1637 struct xfs_scrub_metadata scrub; 1638 int error; 1639 1640 if (!capable(CAP_SYS_ADMIN)) 1641 return -EPERM; 1642 1643 if (copy_from_user(&scrub, arg, sizeof(scrub))) 1644 return -EFAULT; 1645 1646 error = xfs_scrub_metadata(file, &scrub); 1647 if (error) 1648 return error; 1649 1650 if (copy_to_user(arg, &scrub, sizeof(scrub))) 1651 return -EFAULT; 1652 1653 return 0; 1654 } 1655 1656 int 1657 xfs_ioc_swapext( 1658 xfs_swapext_t *sxp) 1659 { 1660 xfs_inode_t *ip, *tip; 1661 struct fd f, tmp; 1662 int error = 0; 1663 1664 /* Pull information for the target fd */ 1665 f = fdget((int)sxp->sx_fdtarget); 1666 if (!f.file) { 1667 error = -EINVAL; 1668 goto out; 1669 } 1670 1671 if (!(f.file->f_mode & FMODE_WRITE) || 1672 !(f.file->f_mode & FMODE_READ) || 1673 (f.file->f_flags & O_APPEND)) { 1674 error = -EBADF; 1675 goto out_put_file; 1676 } 1677 1678 tmp = fdget((int)sxp->sx_fdtmp); 1679 if (!tmp.file) { 1680 error = -EINVAL; 1681 goto out_put_file; 1682 } 1683 1684 if (!(tmp.file->f_mode & FMODE_WRITE) || 1685 !(tmp.file->f_mode & FMODE_READ) || 1686 (tmp.file->f_flags & O_APPEND)) { 1687 error = -EBADF; 1688 goto out_put_tmp_file; 1689 } 1690 1691 if (IS_SWAPFILE(file_inode(f.file)) || 1692 IS_SWAPFILE(file_inode(tmp.file))) { 1693 error = -EINVAL; 1694 goto out_put_tmp_file; 1695 } 1696 1697 /* 1698 * We need to ensure that the fds passed in point to XFS inodes 1699 * before we cast and access them as XFS structures as we have no 1700 * control over what the user passes us here. 1701 */ 1702 if (f.file->f_op != &xfs_file_operations || 1703 tmp.file->f_op != &xfs_file_operations) { 1704 error = -EINVAL; 1705 goto out_put_tmp_file; 1706 } 1707 1708 ip = XFS_I(file_inode(f.file)); 1709 tip = XFS_I(file_inode(tmp.file)); 1710 1711 if (ip->i_mount != tip->i_mount) { 1712 error = -EINVAL; 1713 goto out_put_tmp_file; 1714 } 1715 1716 if (ip->i_ino == tip->i_ino) { 1717 error = -EINVAL; 1718 goto out_put_tmp_file; 1719 } 1720 1721 if (xfs_is_shutdown(ip->i_mount)) { 1722 error = -EIO; 1723 goto out_put_tmp_file; 1724 } 1725 1726 error = xfs_swap_extents(ip, tip, sxp); 1727 1728 out_put_tmp_file: 1729 fdput(tmp); 1730 out_put_file: 1731 fdput(f); 1732 out: 1733 return error; 1734 } 1735 1736 static int 1737 xfs_ioc_getlabel( 1738 struct xfs_mount *mp, 1739 char __user *user_label) 1740 { 1741 struct xfs_sb *sbp = &mp->m_sb; 1742 char label[XFSLABEL_MAX + 1]; 1743 1744 /* Paranoia */ 1745 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 1746 1747 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 1748 memset(label, 0, sizeof(label)); 1749 spin_lock(&mp->m_sb_lock); 1750 strncpy(label, sbp->sb_fname, XFSLABEL_MAX); 1751 spin_unlock(&mp->m_sb_lock); 1752 1753 if (copy_to_user(user_label, label, sizeof(label))) 1754 return -EFAULT; 1755 return 0; 1756 } 1757 1758 static int 1759 xfs_ioc_setlabel( 1760 struct file *filp, 1761 struct xfs_mount *mp, 1762 char __user *newlabel) 1763 { 1764 struct xfs_sb *sbp = &mp->m_sb; 1765 char label[XFSLABEL_MAX + 1]; 1766 size_t len; 1767 int error; 1768 1769 if (!capable(CAP_SYS_ADMIN)) 1770 return -EPERM; 1771 /* 1772 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 1773 * smaller, at 12 bytes. We copy one more to be sure we find the 1774 * (required) NULL character to test the incoming label length. 1775 * NB: The on disk label doesn't need to be null terminated. 1776 */ 1777 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 1778 return -EFAULT; 1779 len = strnlen(label, XFSLABEL_MAX + 1); 1780 if (len > sizeof(sbp->sb_fname)) 1781 return -EINVAL; 1782 1783 error = mnt_want_write_file(filp); 1784 if (error) 1785 return error; 1786 1787 spin_lock(&mp->m_sb_lock); 1788 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 1789 memcpy(sbp->sb_fname, label, len); 1790 spin_unlock(&mp->m_sb_lock); 1791 1792 /* 1793 * Now we do several things to satisfy userspace. 1794 * In addition to normal logging of the primary superblock, we also 1795 * immediately write these changes to sector zero for the primary, then 1796 * update all backup supers (as xfs_db does for a label change), then 1797 * invalidate the block device page cache. This is so that any prior 1798 * buffered reads from userspace (i.e. from blkid) are invalidated, 1799 * and userspace will see the newly-written label. 1800 */ 1801 error = xfs_sync_sb_buf(mp); 1802 if (error) 1803 goto out; 1804 /* 1805 * growfs also updates backup supers so lock against that. 1806 */ 1807 mutex_lock(&mp->m_growlock); 1808 error = xfs_update_secondary_sbs(mp); 1809 mutex_unlock(&mp->m_growlock); 1810 1811 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 1812 1813 out: 1814 mnt_drop_write_file(filp); 1815 return error; 1816 } 1817 1818 static inline int 1819 xfs_fs_eofblocks_from_user( 1820 struct xfs_fs_eofblocks *src, 1821 struct xfs_icwalk *dst) 1822 { 1823 if (src->eof_version != XFS_EOFBLOCKS_VERSION) 1824 return -EINVAL; 1825 1826 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID) 1827 return -EINVAL; 1828 1829 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) || 1830 memchr_inv(src->pad64, 0, sizeof(src->pad64))) 1831 return -EINVAL; 1832 1833 dst->icw_flags = 0; 1834 if (src->eof_flags & XFS_EOF_FLAGS_SYNC) 1835 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC; 1836 if (src->eof_flags & XFS_EOF_FLAGS_UID) 1837 dst->icw_flags |= XFS_ICWALK_FLAG_UID; 1838 if (src->eof_flags & XFS_EOF_FLAGS_GID) 1839 dst->icw_flags |= XFS_ICWALK_FLAG_GID; 1840 if (src->eof_flags & XFS_EOF_FLAGS_PRID) 1841 dst->icw_flags |= XFS_ICWALK_FLAG_PRID; 1842 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE) 1843 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE; 1844 1845 dst->icw_prid = src->eof_prid; 1846 dst->icw_min_file_size = src->eof_min_file_size; 1847 1848 dst->icw_uid = INVALID_UID; 1849 if (src->eof_flags & XFS_EOF_FLAGS_UID) { 1850 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid); 1851 if (!uid_valid(dst->icw_uid)) 1852 return -EINVAL; 1853 } 1854 1855 dst->icw_gid = INVALID_GID; 1856 if (src->eof_flags & XFS_EOF_FLAGS_GID) { 1857 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid); 1858 if (!gid_valid(dst->icw_gid)) 1859 return -EINVAL; 1860 } 1861 return 0; 1862 } 1863 1864 /* 1865 * These long-unused ioctls were removed from the official ioctl API in 5.17, 1866 * but retain these definitions so that we can log warnings about them. 1867 */ 1868 #define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64) 1869 #define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64) 1870 #define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64) 1871 #define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64) 1872 1873 /* 1874 * Note: some of the ioctl's return positive numbers as a 1875 * byte count indicating success, such as readlink_by_handle. 1876 * So we don't "sign flip" like most other routines. This means 1877 * true errors need to be returned as a negative value. 1878 */ 1879 long 1880 xfs_file_ioctl( 1881 struct file *filp, 1882 unsigned int cmd, 1883 unsigned long p) 1884 { 1885 struct inode *inode = file_inode(filp); 1886 struct xfs_inode *ip = XFS_I(inode); 1887 struct xfs_mount *mp = ip->i_mount; 1888 void __user *arg = (void __user *)p; 1889 int error; 1890 1891 trace_xfs_file_ioctl(ip); 1892 1893 switch (cmd) { 1894 case FITRIM: 1895 return xfs_ioc_trim(mp, arg); 1896 case FS_IOC_GETFSLABEL: 1897 return xfs_ioc_getlabel(mp, arg); 1898 case FS_IOC_SETFSLABEL: 1899 return xfs_ioc_setlabel(filp, mp, arg); 1900 case XFS_IOC_ALLOCSP: 1901 case XFS_IOC_FREESP: 1902 case XFS_IOC_ALLOCSP64: 1903 case XFS_IOC_FREESP64: 1904 xfs_warn_once(mp, 1905 "%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported", 1906 current->comm); 1907 return -ENOTTY; 1908 case XFS_IOC_DIOINFO: { 1909 struct xfs_buftarg *target = xfs_inode_buftarg(ip); 1910 struct dioattr da; 1911 1912 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1913 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1914 1915 if (copy_to_user(arg, &da, sizeof(da))) 1916 return -EFAULT; 1917 return 0; 1918 } 1919 1920 case XFS_IOC_FSBULKSTAT_SINGLE: 1921 case XFS_IOC_FSBULKSTAT: 1922 case XFS_IOC_FSINUMBERS: 1923 return xfs_ioc_fsbulkstat(filp, cmd, arg); 1924 1925 case XFS_IOC_BULKSTAT: 1926 return xfs_ioc_bulkstat(filp, cmd, arg); 1927 case XFS_IOC_INUMBERS: 1928 return xfs_ioc_inumbers(mp, cmd, arg); 1929 1930 case XFS_IOC_FSGEOMETRY_V1: 1931 return xfs_ioc_fsgeometry(mp, arg, 3); 1932 case XFS_IOC_FSGEOMETRY_V4: 1933 return xfs_ioc_fsgeometry(mp, arg, 4); 1934 case XFS_IOC_FSGEOMETRY: 1935 return xfs_ioc_fsgeometry(mp, arg, 5); 1936 1937 case XFS_IOC_AG_GEOMETRY: 1938 return xfs_ioc_ag_geometry(mp, arg); 1939 1940 case XFS_IOC_GETVERSION: 1941 return put_user(inode->i_generation, (int __user *)arg); 1942 1943 case XFS_IOC_FSGETXATTRA: 1944 return xfs_ioc_fsgetxattra(ip, arg); 1945 1946 case XFS_IOC_GETBMAP: 1947 case XFS_IOC_GETBMAPA: 1948 case XFS_IOC_GETBMAPX: 1949 return xfs_ioc_getbmap(filp, cmd, arg); 1950 1951 case FS_IOC_GETFSMAP: 1952 return xfs_ioc_getfsmap(ip, arg); 1953 1954 case XFS_IOC_SCRUB_METADATA: 1955 return xfs_ioc_scrub_metadata(filp, arg); 1956 1957 case XFS_IOC_FD_TO_HANDLE: 1958 case XFS_IOC_PATH_TO_HANDLE: 1959 case XFS_IOC_PATH_TO_FSHANDLE: { 1960 xfs_fsop_handlereq_t hreq; 1961 1962 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1963 return -EFAULT; 1964 return xfs_find_handle(cmd, &hreq); 1965 } 1966 case XFS_IOC_OPEN_BY_HANDLE: { 1967 xfs_fsop_handlereq_t hreq; 1968 1969 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1970 return -EFAULT; 1971 return xfs_open_by_handle(filp, &hreq); 1972 } 1973 1974 case XFS_IOC_READLINK_BY_HANDLE: { 1975 xfs_fsop_handlereq_t hreq; 1976 1977 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1978 return -EFAULT; 1979 return xfs_readlink_by_handle(filp, &hreq); 1980 } 1981 case XFS_IOC_ATTRLIST_BY_HANDLE: 1982 return xfs_attrlist_by_handle(filp, arg); 1983 1984 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1985 return xfs_attrmulti_by_handle(filp, arg); 1986 1987 case XFS_IOC_SWAPEXT: { 1988 struct xfs_swapext sxp; 1989 1990 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1991 return -EFAULT; 1992 error = mnt_want_write_file(filp); 1993 if (error) 1994 return error; 1995 error = xfs_ioc_swapext(&sxp); 1996 mnt_drop_write_file(filp); 1997 return error; 1998 } 1999 2000 case XFS_IOC_FSCOUNTS: { 2001 xfs_fsop_counts_t out; 2002 2003 xfs_fs_counts(mp, &out); 2004 2005 if (copy_to_user(arg, &out, sizeof(out))) 2006 return -EFAULT; 2007 return 0; 2008 } 2009 2010 case XFS_IOC_SET_RESBLKS: { 2011 xfs_fsop_resblks_t inout; 2012 uint64_t in; 2013 2014 if (!capable(CAP_SYS_ADMIN)) 2015 return -EPERM; 2016 2017 if (xfs_is_readonly(mp)) 2018 return -EROFS; 2019 2020 if (copy_from_user(&inout, arg, sizeof(inout))) 2021 return -EFAULT; 2022 2023 error = mnt_want_write_file(filp); 2024 if (error) 2025 return error; 2026 2027 /* input parameter is passed in resblks field of structure */ 2028 in = inout.resblks; 2029 error = xfs_reserve_blocks(mp, &in, &inout); 2030 mnt_drop_write_file(filp); 2031 if (error) 2032 return error; 2033 2034 if (copy_to_user(arg, &inout, sizeof(inout))) 2035 return -EFAULT; 2036 return 0; 2037 } 2038 2039 case XFS_IOC_GET_RESBLKS: { 2040 xfs_fsop_resblks_t out; 2041 2042 if (!capable(CAP_SYS_ADMIN)) 2043 return -EPERM; 2044 2045 error = xfs_reserve_blocks(mp, NULL, &out); 2046 if (error) 2047 return error; 2048 2049 if (copy_to_user(arg, &out, sizeof(out))) 2050 return -EFAULT; 2051 2052 return 0; 2053 } 2054 2055 case XFS_IOC_FSGROWFSDATA: { 2056 struct xfs_growfs_data in; 2057 2058 if (copy_from_user(&in, arg, sizeof(in))) 2059 return -EFAULT; 2060 2061 error = mnt_want_write_file(filp); 2062 if (error) 2063 return error; 2064 error = xfs_growfs_data(mp, &in); 2065 mnt_drop_write_file(filp); 2066 return error; 2067 } 2068 2069 case XFS_IOC_FSGROWFSLOG: { 2070 struct xfs_growfs_log in; 2071 2072 if (copy_from_user(&in, arg, sizeof(in))) 2073 return -EFAULT; 2074 2075 error = mnt_want_write_file(filp); 2076 if (error) 2077 return error; 2078 error = xfs_growfs_log(mp, &in); 2079 mnt_drop_write_file(filp); 2080 return error; 2081 } 2082 2083 case XFS_IOC_FSGROWFSRT: { 2084 xfs_growfs_rt_t in; 2085 2086 if (copy_from_user(&in, arg, sizeof(in))) 2087 return -EFAULT; 2088 2089 error = mnt_want_write_file(filp); 2090 if (error) 2091 return error; 2092 error = xfs_growfs_rt(mp, &in); 2093 mnt_drop_write_file(filp); 2094 return error; 2095 } 2096 2097 case XFS_IOC_GOINGDOWN: { 2098 uint32_t in; 2099 2100 if (!capable(CAP_SYS_ADMIN)) 2101 return -EPERM; 2102 2103 if (get_user(in, (uint32_t __user *)arg)) 2104 return -EFAULT; 2105 2106 return xfs_fs_goingdown(mp, in); 2107 } 2108 2109 case XFS_IOC_ERROR_INJECTION: { 2110 xfs_error_injection_t in; 2111 2112 if (!capable(CAP_SYS_ADMIN)) 2113 return -EPERM; 2114 2115 if (copy_from_user(&in, arg, sizeof(in))) 2116 return -EFAULT; 2117 2118 return xfs_errortag_add(mp, in.errtag); 2119 } 2120 2121 case XFS_IOC_ERROR_CLEARALL: 2122 if (!capable(CAP_SYS_ADMIN)) 2123 return -EPERM; 2124 2125 return xfs_errortag_clearall(mp); 2126 2127 case XFS_IOC_FREE_EOFBLOCKS: { 2128 struct xfs_fs_eofblocks eofb; 2129 struct xfs_icwalk icw; 2130 2131 if (!capable(CAP_SYS_ADMIN)) 2132 return -EPERM; 2133 2134 if (xfs_is_readonly(mp)) 2135 return -EROFS; 2136 2137 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2138 return -EFAULT; 2139 2140 error = xfs_fs_eofblocks_from_user(&eofb, &icw); 2141 if (error) 2142 return error; 2143 2144 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_); 2145 2146 sb_start_write(mp->m_super); 2147 error = xfs_blockgc_free_space(mp, &icw); 2148 sb_end_write(mp->m_super); 2149 return error; 2150 } 2151 2152 default: 2153 return -ENOTTY; 2154 } 2155 } 2156