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