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 39 #include <linux/mount.h> 40 #include <linux/namei.h> 41 42 /* 43 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 44 * a file or fs handle. 45 * 46 * XFS_IOC_PATH_TO_FSHANDLE 47 * returns fs handle for a mount point or path within that mount point 48 * XFS_IOC_FD_TO_HANDLE 49 * returns full handle for a FD opened in user space 50 * XFS_IOC_PATH_TO_HANDLE 51 * returns full handle for a path 52 */ 53 int 54 xfs_find_handle( 55 unsigned int cmd, 56 xfs_fsop_handlereq_t *hreq) 57 { 58 int hsize; 59 xfs_handle_t handle; 60 struct inode *inode; 61 struct fd f = {NULL}; 62 struct path path; 63 int error; 64 struct xfs_inode *ip; 65 66 if (cmd == XFS_IOC_FD_TO_HANDLE) { 67 f = fdget(hreq->fd); 68 if (!f.file) 69 return -EBADF; 70 inode = file_inode(f.file); 71 } else { 72 error = user_path_at(AT_FDCWD, hreq->path, 0, &path); 73 if (error) 74 return error; 75 inode = d_inode(path.dentry); 76 } 77 ip = XFS_I(inode); 78 79 /* 80 * We can only generate handles for inodes residing on a XFS filesystem, 81 * and only for regular files, directories or symbolic links. 82 */ 83 error = -EINVAL; 84 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 85 goto out_put; 86 87 error = -EBADF; 88 if (!S_ISREG(inode->i_mode) && 89 !S_ISDIR(inode->i_mode) && 90 !S_ISLNK(inode->i_mode)) 91 goto out_put; 92 93 94 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 95 96 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 97 /* 98 * This handle only contains an fsid, zero the rest. 99 */ 100 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 101 hsize = sizeof(xfs_fsid_t); 102 } else { 103 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 104 sizeof(handle.ha_fid.fid_len); 105 handle.ha_fid.fid_pad = 0; 106 handle.ha_fid.fid_gen = inode->i_generation; 107 handle.ha_fid.fid_ino = ip->i_ino; 108 hsize = sizeof(xfs_handle_t); 109 } 110 111 error = -EFAULT; 112 if (copy_to_user(hreq->ohandle, &handle, hsize) || 113 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 114 goto out_put; 115 116 error = 0; 117 118 out_put: 119 if (cmd == XFS_IOC_FD_TO_HANDLE) 120 fdput(f); 121 else 122 path_put(&path); 123 return error; 124 } 125 126 /* 127 * No need to do permission checks on the various pathname components 128 * as the handle operations are privileged. 129 */ 130 STATIC int 131 xfs_handle_acceptable( 132 void *context, 133 struct dentry *dentry) 134 { 135 return 1; 136 } 137 138 /* 139 * Convert userspace handle data into a dentry. 140 */ 141 struct dentry * 142 xfs_handle_to_dentry( 143 struct file *parfilp, 144 void __user *uhandle, 145 u32 hlen) 146 { 147 xfs_handle_t handle; 148 struct xfs_fid64 fid; 149 150 /* 151 * Only allow handle opens under a directory. 152 */ 153 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 154 return ERR_PTR(-ENOTDIR); 155 156 if (hlen != sizeof(xfs_handle_t)) 157 return ERR_PTR(-EINVAL); 158 if (copy_from_user(&handle, uhandle, hlen)) 159 return ERR_PTR(-EFAULT); 160 if (handle.ha_fid.fid_len != 161 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 162 return ERR_PTR(-EINVAL); 163 164 memset(&fid, 0, sizeof(struct fid)); 165 fid.ino = handle.ha_fid.fid_ino; 166 fid.gen = handle.ha_fid.fid_gen; 167 168 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 169 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 170 xfs_handle_acceptable, NULL); 171 } 172 173 STATIC struct dentry * 174 xfs_handlereq_to_dentry( 175 struct file *parfilp, 176 xfs_fsop_handlereq_t *hreq) 177 { 178 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 179 } 180 181 int 182 xfs_open_by_handle( 183 struct file *parfilp, 184 xfs_fsop_handlereq_t *hreq) 185 { 186 const struct cred *cred = current_cred(); 187 int error; 188 int fd; 189 int permflag; 190 struct file *filp; 191 struct inode *inode; 192 struct dentry *dentry; 193 fmode_t fmode; 194 struct path path; 195 196 if (!capable(CAP_SYS_ADMIN)) 197 return -EPERM; 198 199 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 200 if (IS_ERR(dentry)) 201 return PTR_ERR(dentry); 202 inode = d_inode(dentry); 203 204 /* Restrict xfs_open_by_handle to directories & regular files. */ 205 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 206 error = -EPERM; 207 goto out_dput; 208 } 209 210 #if BITS_PER_LONG != 32 211 hreq->oflags |= O_LARGEFILE; 212 #endif 213 214 permflag = hreq->oflags; 215 fmode = OPEN_FMODE(permflag); 216 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 217 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 218 error = -EPERM; 219 goto out_dput; 220 } 221 222 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 223 error = -EPERM; 224 goto out_dput; 225 } 226 227 /* Can't write directories. */ 228 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 229 error = -EISDIR; 230 goto out_dput; 231 } 232 233 fd = get_unused_fd_flags(0); 234 if (fd < 0) { 235 error = fd; 236 goto out_dput; 237 } 238 239 path.mnt = parfilp->f_path.mnt; 240 path.dentry = dentry; 241 filp = dentry_open(&path, hreq->oflags, cred); 242 dput(dentry); 243 if (IS_ERR(filp)) { 244 put_unused_fd(fd); 245 return PTR_ERR(filp); 246 } 247 248 if (S_ISREG(inode->i_mode)) { 249 filp->f_flags |= O_NOATIME; 250 filp->f_mode |= FMODE_NOCMTIME; 251 } 252 253 fd_install(fd, filp); 254 return fd; 255 256 out_dput: 257 dput(dentry); 258 return error; 259 } 260 261 int 262 xfs_readlink_by_handle( 263 struct file *parfilp, 264 xfs_fsop_handlereq_t *hreq) 265 { 266 struct dentry *dentry; 267 __u32 olen; 268 int error; 269 270 if (!capable(CAP_SYS_ADMIN)) 271 return -EPERM; 272 273 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 274 if (IS_ERR(dentry)) 275 return PTR_ERR(dentry); 276 277 /* Restrict this handle operation to symlinks only. */ 278 if (!d_is_symlink(dentry)) { 279 error = -EINVAL; 280 goto out_dput; 281 } 282 283 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 284 error = -EFAULT; 285 goto out_dput; 286 } 287 288 error = vfs_readlink(dentry, hreq->ohandle, olen); 289 290 out_dput: 291 dput(dentry); 292 return error; 293 } 294 295 STATIC int 296 xfs_attrlist_by_handle( 297 struct file *parfilp, 298 void __user *arg) 299 { 300 int error = -ENOMEM; 301 attrlist_cursor_kern_t *cursor; 302 struct xfs_fsop_attrlist_handlereq __user *p = arg; 303 xfs_fsop_attrlist_handlereq_t al_hreq; 304 struct dentry *dentry; 305 char *kbuf; 306 307 if (!capable(CAP_SYS_ADMIN)) 308 return -EPERM; 309 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 310 return -EFAULT; 311 if (al_hreq.buflen < sizeof(struct attrlist) || 312 al_hreq.buflen > XFS_XATTR_LIST_MAX) 313 return -EINVAL; 314 315 /* 316 * Reject flags, only allow namespaces. 317 */ 318 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 319 return -EINVAL; 320 321 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 322 if (IS_ERR(dentry)) 323 return PTR_ERR(dentry); 324 325 kbuf = kmem_zalloc_large(al_hreq.buflen, 0); 326 if (!kbuf) 327 goto out_dput; 328 329 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 330 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen, 331 al_hreq.flags, cursor); 332 if (error) 333 goto out_kfree; 334 335 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) { 336 error = -EFAULT; 337 goto out_kfree; 338 } 339 340 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 341 error = -EFAULT; 342 343 out_kfree: 344 kmem_free(kbuf); 345 out_dput: 346 dput(dentry); 347 return error; 348 } 349 350 int 351 xfs_attrmulti_attr_get( 352 struct inode *inode, 353 unsigned char *name, 354 unsigned char __user *ubuf, 355 uint32_t *len, 356 uint32_t flags) 357 { 358 unsigned char *kbuf; 359 int error = -EFAULT; 360 size_t namelen; 361 362 if (*len > XFS_XATTR_SIZE_MAX) 363 return -EINVAL; 364 kbuf = kmem_zalloc_large(*len, 0); 365 if (!kbuf) 366 return -ENOMEM; 367 368 namelen = strlen(name); 369 error = xfs_attr_get(XFS_I(inode), name, namelen, &kbuf, (int *)len, 370 flags); 371 if (error) 372 goto out_kfree; 373 374 if (copy_to_user(ubuf, kbuf, *len)) 375 error = -EFAULT; 376 377 out_kfree: 378 kmem_free(kbuf); 379 return error; 380 } 381 382 int 383 xfs_attrmulti_attr_set( 384 struct inode *inode, 385 unsigned char *name, 386 const unsigned char __user *ubuf, 387 uint32_t len, 388 uint32_t flags) 389 { 390 unsigned char *kbuf; 391 int error; 392 size_t namelen; 393 394 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 395 return -EPERM; 396 if (len > XFS_XATTR_SIZE_MAX) 397 return -EINVAL; 398 399 kbuf = memdup_user(ubuf, len); 400 if (IS_ERR(kbuf)) 401 return PTR_ERR(kbuf); 402 403 namelen = strlen(name); 404 error = xfs_attr_set(XFS_I(inode), name, namelen, kbuf, len, flags); 405 if (!error) 406 xfs_forget_acl(inode, name, flags); 407 kfree(kbuf); 408 return error; 409 } 410 411 int 412 xfs_attrmulti_attr_remove( 413 struct inode *inode, 414 unsigned char *name, 415 uint32_t flags) 416 { 417 int error; 418 size_t namelen; 419 420 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 421 return -EPERM; 422 namelen = strlen(name); 423 error = xfs_attr_remove(XFS_I(inode), name, namelen, flags); 424 if (!error) 425 xfs_forget_acl(inode, name, flags); 426 return error; 427 } 428 429 STATIC int 430 xfs_attrmulti_by_handle( 431 struct file *parfilp, 432 void __user *arg) 433 { 434 int error; 435 xfs_attr_multiop_t *ops; 436 xfs_fsop_attrmulti_handlereq_t am_hreq; 437 struct dentry *dentry; 438 unsigned int i, size; 439 unsigned char *attr_name; 440 441 if (!capable(CAP_SYS_ADMIN)) 442 return -EPERM; 443 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 444 return -EFAULT; 445 446 /* overflow check */ 447 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 448 return -E2BIG; 449 450 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 451 if (IS_ERR(dentry)) 452 return PTR_ERR(dentry); 453 454 error = -E2BIG; 455 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 456 if (!size || size > 16 * PAGE_SIZE) 457 goto out_dput; 458 459 ops = memdup_user(am_hreq.ops, size); 460 if (IS_ERR(ops)) { 461 error = PTR_ERR(ops); 462 goto out_dput; 463 } 464 465 error = -ENOMEM; 466 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 467 if (!attr_name) 468 goto out_kfree_ops; 469 470 error = 0; 471 for (i = 0; i < am_hreq.opcount; i++) { 472 if ((ops[i].am_flags & ATTR_ROOT) && 473 (ops[i].am_flags & ATTR_SECURE)) { 474 ops[i].am_error = -EINVAL; 475 continue; 476 } 477 ops[i].am_flags &= ~ATTR_KERNEL_FLAGS; 478 479 ops[i].am_error = strncpy_from_user((char *)attr_name, 480 ops[i].am_attrname, MAXNAMELEN); 481 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 482 error = -ERANGE; 483 if (ops[i].am_error < 0) 484 break; 485 486 switch (ops[i].am_opcode) { 487 case ATTR_OP_GET: 488 ops[i].am_error = xfs_attrmulti_attr_get( 489 d_inode(dentry), attr_name, 490 ops[i].am_attrvalue, &ops[i].am_length, 491 ops[i].am_flags); 492 break; 493 case ATTR_OP_SET: 494 ops[i].am_error = mnt_want_write_file(parfilp); 495 if (ops[i].am_error) 496 break; 497 ops[i].am_error = xfs_attrmulti_attr_set( 498 d_inode(dentry), attr_name, 499 ops[i].am_attrvalue, ops[i].am_length, 500 ops[i].am_flags); 501 mnt_drop_write_file(parfilp); 502 break; 503 case ATTR_OP_REMOVE: 504 ops[i].am_error = mnt_want_write_file(parfilp); 505 if (ops[i].am_error) 506 break; 507 ops[i].am_error = xfs_attrmulti_attr_remove( 508 d_inode(dentry), attr_name, 509 ops[i].am_flags); 510 mnt_drop_write_file(parfilp); 511 break; 512 default: 513 ops[i].am_error = -EINVAL; 514 } 515 } 516 517 if (copy_to_user(am_hreq.ops, ops, size)) 518 error = -EFAULT; 519 520 kfree(attr_name); 521 out_kfree_ops: 522 kfree(ops); 523 out_dput: 524 dput(dentry); 525 return error; 526 } 527 528 int 529 xfs_ioc_space( 530 struct file *filp, 531 xfs_flock64_t *bf) 532 { 533 struct inode *inode = file_inode(filp); 534 struct xfs_inode *ip = XFS_I(inode); 535 struct iattr iattr; 536 enum xfs_prealloc_flags flags = XFS_PREALLOC_CLEAR; 537 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; 538 int error; 539 540 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 541 return -EPERM; 542 543 if (!(filp->f_mode & FMODE_WRITE)) 544 return -EBADF; 545 546 if (!S_ISREG(inode->i_mode)) 547 return -EINVAL; 548 549 if (xfs_is_always_cow_inode(ip)) 550 return -EOPNOTSUPP; 551 552 if (filp->f_flags & O_DSYNC) 553 flags |= XFS_PREALLOC_SYNC; 554 if (filp->f_mode & FMODE_NOCMTIME) 555 flags |= XFS_PREALLOC_INVISIBLE; 556 557 error = mnt_want_write_file(filp); 558 if (error) 559 return error; 560 561 xfs_ilock(ip, iolock); 562 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); 563 if (error) 564 goto out_unlock; 565 inode_dio_wait(inode); 566 567 switch (bf->l_whence) { 568 case 0: /*SEEK_SET*/ 569 break; 570 case 1: /*SEEK_CUR*/ 571 bf->l_start += filp->f_pos; 572 break; 573 case 2: /*SEEK_END*/ 574 bf->l_start += XFS_ISIZE(ip); 575 break; 576 default: 577 error = -EINVAL; 578 goto out_unlock; 579 } 580 581 if (bf->l_start < 0 || bf->l_start > inode->i_sb->s_maxbytes) { 582 error = -EINVAL; 583 goto out_unlock; 584 } 585 586 if (bf->l_start > XFS_ISIZE(ip)) { 587 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 588 bf->l_start - XFS_ISIZE(ip), 0); 589 if (error) 590 goto out_unlock; 591 } 592 593 iattr.ia_valid = ATTR_SIZE; 594 iattr.ia_size = bf->l_start; 595 error = xfs_vn_setattr_size(file_dentry(filp), &iattr); 596 if (error) 597 goto out_unlock; 598 599 error = xfs_update_prealloc_flags(ip, flags); 600 601 out_unlock: 602 xfs_iunlock(ip, iolock); 603 mnt_drop_write_file(filp); 604 return error; 605 } 606 607 /* Return 0 on success or positive error */ 608 int 609 xfs_fsbulkstat_one_fmt( 610 struct xfs_ibulk *breq, 611 const struct xfs_bulkstat *bstat) 612 { 613 struct xfs_bstat bs1; 614 615 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat); 616 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1))) 617 return -EFAULT; 618 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat)); 619 } 620 621 int 622 xfs_fsinumbers_fmt( 623 struct xfs_ibulk *breq, 624 const struct xfs_inumbers *igrp) 625 { 626 struct xfs_inogrp ig1; 627 628 xfs_inumbers_to_inogrp(&ig1, igrp); 629 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp))) 630 return -EFAULT; 631 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp)); 632 } 633 634 STATIC int 635 xfs_ioc_fsbulkstat( 636 xfs_mount_t *mp, 637 unsigned int cmd, 638 void __user *arg) 639 { 640 struct xfs_fsop_bulkreq bulkreq; 641 struct xfs_ibulk breq = { 642 .mp = mp, 643 .ocount = 0, 644 }; 645 xfs_ino_t lastino; 646 int error; 647 648 /* done = 1 if there are more stats to get and if bulkstat */ 649 /* should be called again (unused here, but used in dmapi) */ 650 651 if (!capable(CAP_SYS_ADMIN)) 652 return -EPERM; 653 654 if (XFS_FORCED_SHUTDOWN(mp)) 655 return -EIO; 656 657 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq))) 658 return -EFAULT; 659 660 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64))) 661 return -EFAULT; 662 663 if (bulkreq.icount <= 0) 664 return -EINVAL; 665 666 if (bulkreq.ubuffer == NULL) 667 return -EINVAL; 668 669 breq.ubuffer = bulkreq.ubuffer; 670 breq.icount = bulkreq.icount; 671 672 /* 673 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number 674 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect 675 * that *lastip contains either zero or the number of the last inode to 676 * be examined by the previous call and return results starting with 677 * the next inode after that. The new bulk request back end functions 678 * take the inode to start with, so we have to compute the startino 679 * parameter from lastino to maintain correct function. lastino == 0 680 * is a special case because it has traditionally meant "first inode 681 * in filesystem". 682 */ 683 if (cmd == XFS_IOC_FSINUMBERS) { 684 breq.startino = lastino ? lastino + 1 : 0; 685 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt); 686 lastino = breq.startino - 1; 687 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) { 688 breq.startino = lastino; 689 breq.icount = 1; 690 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt); 691 } else { /* XFS_IOC_FSBULKSTAT */ 692 breq.startino = lastino ? lastino + 1 : 0; 693 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt); 694 lastino = breq.startino - 1; 695 } 696 697 if (error) 698 return error; 699 700 if (bulkreq.lastip != NULL && 701 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t))) 702 return -EFAULT; 703 704 if (bulkreq.ocount != NULL && 705 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32))) 706 return -EFAULT; 707 708 return 0; 709 } 710 711 /* Return 0 on success or positive error */ 712 static int 713 xfs_bulkstat_fmt( 714 struct xfs_ibulk *breq, 715 const struct xfs_bulkstat *bstat) 716 { 717 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat))) 718 return -EFAULT; 719 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat)); 720 } 721 722 /* 723 * Check the incoming bulk request @hdr from userspace and initialize the 724 * internal @breq bulk request appropriately. Returns 0 if the bulk request 725 * should proceed; -ECANCELED if there's nothing to do; or the usual 726 * negative error code. 727 */ 728 static int 729 xfs_bulk_ireq_setup( 730 struct xfs_mount *mp, 731 struct xfs_bulk_ireq *hdr, 732 struct xfs_ibulk *breq, 733 void __user *ubuffer) 734 { 735 if (hdr->icount == 0 || 736 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) || 737 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) 738 return -EINVAL; 739 740 breq->startino = hdr->ino; 741 breq->ubuffer = ubuffer; 742 breq->icount = hdr->icount; 743 breq->ocount = 0; 744 breq->flags = 0; 745 746 /* 747 * The @ino parameter is a special value, so we must look it up here. 748 * We're not allowed to have IREQ_AGNO, and we only return one inode 749 * worth of data. 750 */ 751 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) { 752 if (hdr->flags & XFS_BULK_IREQ_AGNO) 753 return -EINVAL; 754 755 switch (hdr->ino) { 756 case XFS_BULK_IREQ_SPECIAL_ROOT: 757 hdr->ino = mp->m_sb.sb_rootino; 758 break; 759 default: 760 return -EINVAL; 761 } 762 breq->icount = 1; 763 } 764 765 /* 766 * The IREQ_AGNO flag means that we only want results from a given AG. 767 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is 768 * beyond the specified AG then we return no results. 769 */ 770 if (hdr->flags & XFS_BULK_IREQ_AGNO) { 771 if (hdr->agno >= mp->m_sb.sb_agcount) 772 return -EINVAL; 773 774 if (breq->startino == 0) 775 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0); 776 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno) 777 return -EINVAL; 778 779 breq->flags |= XFS_IBULK_SAME_AG; 780 781 /* Asking for an inode past the end of the AG? We're done! */ 782 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno) 783 return -ECANCELED; 784 } else if (hdr->agno) 785 return -EINVAL; 786 787 /* Asking for an inode past the end of the FS? We're done! */ 788 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount) 789 return -ECANCELED; 790 791 return 0; 792 } 793 794 /* 795 * Update the userspace bulk request @hdr to reflect the end state of the 796 * internal bulk request @breq. 797 */ 798 static void 799 xfs_bulk_ireq_teardown( 800 struct xfs_bulk_ireq *hdr, 801 struct xfs_ibulk *breq) 802 { 803 hdr->ino = breq->startino; 804 hdr->ocount = breq->ocount; 805 } 806 807 /* Handle the v5 bulkstat ioctl. */ 808 STATIC int 809 xfs_ioc_bulkstat( 810 struct xfs_mount *mp, 811 unsigned int cmd, 812 struct xfs_bulkstat_req __user *arg) 813 { 814 struct xfs_bulk_ireq hdr; 815 struct xfs_ibulk breq = { 816 .mp = mp, 817 }; 818 int error; 819 820 if (!capable(CAP_SYS_ADMIN)) 821 return -EPERM; 822 823 if (XFS_FORCED_SHUTDOWN(mp)) 824 return -EIO; 825 826 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 827 return -EFAULT; 828 829 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat); 830 if (error == -ECANCELED) 831 goto out_teardown; 832 if (error < 0) 833 return error; 834 835 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt); 836 if (error) 837 return error; 838 839 out_teardown: 840 xfs_bulk_ireq_teardown(&hdr, &breq); 841 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 842 return -EFAULT; 843 844 return 0; 845 } 846 847 STATIC int 848 xfs_inumbers_fmt( 849 struct xfs_ibulk *breq, 850 const struct xfs_inumbers *igrp) 851 { 852 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers))) 853 return -EFAULT; 854 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers)); 855 } 856 857 /* Handle the v5 inumbers ioctl. */ 858 STATIC int 859 xfs_ioc_inumbers( 860 struct xfs_mount *mp, 861 unsigned int cmd, 862 struct xfs_inumbers_req __user *arg) 863 { 864 struct xfs_bulk_ireq hdr; 865 struct xfs_ibulk breq = { 866 .mp = mp, 867 }; 868 int error; 869 870 if (!capable(CAP_SYS_ADMIN)) 871 return -EPERM; 872 873 if (XFS_FORCED_SHUTDOWN(mp)) 874 return -EIO; 875 876 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 877 return -EFAULT; 878 879 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers); 880 if (error == -ECANCELED) 881 goto out_teardown; 882 if (error < 0) 883 return error; 884 885 error = xfs_inumbers(&breq, xfs_inumbers_fmt); 886 if (error) 887 return error; 888 889 out_teardown: 890 xfs_bulk_ireq_teardown(&hdr, &breq); 891 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 892 return -EFAULT; 893 894 return 0; 895 } 896 897 STATIC int 898 xfs_ioc_fsgeometry( 899 struct xfs_mount *mp, 900 void __user *arg, 901 int struct_version) 902 { 903 struct xfs_fsop_geom fsgeo; 904 size_t len; 905 906 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version); 907 908 if (struct_version <= 3) 909 len = sizeof(struct xfs_fsop_geom_v1); 910 else if (struct_version == 4) 911 len = sizeof(struct xfs_fsop_geom_v4); 912 else { 913 xfs_fsop_geom_health(mp, &fsgeo); 914 len = sizeof(fsgeo); 915 } 916 917 if (copy_to_user(arg, &fsgeo, len)) 918 return -EFAULT; 919 return 0; 920 } 921 922 STATIC int 923 xfs_ioc_ag_geometry( 924 struct xfs_mount *mp, 925 void __user *arg) 926 { 927 struct xfs_ag_geometry ageo; 928 int error; 929 930 if (copy_from_user(&ageo, arg, sizeof(ageo))) 931 return -EFAULT; 932 if (ageo.ag_flags) 933 return -EINVAL; 934 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved))) 935 return -EINVAL; 936 937 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo); 938 if (error) 939 return error; 940 941 if (copy_to_user(arg, &ageo, sizeof(ageo))) 942 return -EFAULT; 943 return 0; 944 } 945 946 /* 947 * Linux extended inode flags interface. 948 */ 949 950 STATIC unsigned int 951 xfs_merge_ioc_xflags( 952 unsigned int flags, 953 unsigned int start) 954 { 955 unsigned int xflags = start; 956 957 if (flags & FS_IMMUTABLE_FL) 958 xflags |= FS_XFLAG_IMMUTABLE; 959 else 960 xflags &= ~FS_XFLAG_IMMUTABLE; 961 if (flags & FS_APPEND_FL) 962 xflags |= FS_XFLAG_APPEND; 963 else 964 xflags &= ~FS_XFLAG_APPEND; 965 if (flags & FS_SYNC_FL) 966 xflags |= FS_XFLAG_SYNC; 967 else 968 xflags &= ~FS_XFLAG_SYNC; 969 if (flags & FS_NOATIME_FL) 970 xflags |= FS_XFLAG_NOATIME; 971 else 972 xflags &= ~FS_XFLAG_NOATIME; 973 if (flags & FS_NODUMP_FL) 974 xflags |= FS_XFLAG_NODUMP; 975 else 976 xflags &= ~FS_XFLAG_NODUMP; 977 978 return xflags; 979 } 980 981 STATIC unsigned int 982 xfs_di2lxflags( 983 uint16_t di_flags) 984 { 985 unsigned int flags = 0; 986 987 if (di_flags & XFS_DIFLAG_IMMUTABLE) 988 flags |= FS_IMMUTABLE_FL; 989 if (di_flags & XFS_DIFLAG_APPEND) 990 flags |= FS_APPEND_FL; 991 if (di_flags & XFS_DIFLAG_SYNC) 992 flags |= FS_SYNC_FL; 993 if (di_flags & XFS_DIFLAG_NOATIME) 994 flags |= FS_NOATIME_FL; 995 if (di_flags & XFS_DIFLAG_NODUMP) 996 flags |= FS_NODUMP_FL; 997 return flags; 998 } 999 1000 static void 1001 xfs_fill_fsxattr( 1002 struct xfs_inode *ip, 1003 bool attr, 1004 struct fsxattr *fa) 1005 { 1006 simple_fill_fsxattr(fa, xfs_ip2xflags(ip)); 1007 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 1008 fa->fsx_cowextsize = ip->i_d.di_cowextsize << 1009 ip->i_mount->m_sb.sb_blocklog; 1010 fa->fsx_projid = ip->i_d.di_projid; 1011 1012 if (attr) { 1013 if (ip->i_afp) { 1014 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 1015 fa->fsx_nextents = xfs_iext_count(ip->i_afp); 1016 else 1017 fa->fsx_nextents = ip->i_d.di_anextents; 1018 } else 1019 fa->fsx_nextents = 0; 1020 } else { 1021 if (ip->i_df.if_flags & XFS_IFEXTENTS) 1022 fa->fsx_nextents = xfs_iext_count(&ip->i_df); 1023 else 1024 fa->fsx_nextents = ip->i_d.di_nextents; 1025 } 1026 } 1027 1028 STATIC int 1029 xfs_ioc_fsgetxattr( 1030 xfs_inode_t *ip, 1031 int attr, 1032 void __user *arg) 1033 { 1034 struct fsxattr fa; 1035 1036 xfs_ilock(ip, XFS_ILOCK_SHARED); 1037 xfs_fill_fsxattr(ip, attr, &fa); 1038 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1039 1040 if (copy_to_user(arg, &fa, sizeof(fa))) 1041 return -EFAULT; 1042 return 0; 1043 } 1044 1045 STATIC uint16_t 1046 xfs_flags2diflags( 1047 struct xfs_inode *ip, 1048 unsigned int xflags) 1049 { 1050 /* can't set PREALLOC this way, just preserve it */ 1051 uint16_t di_flags = 1052 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 1053 1054 if (xflags & FS_XFLAG_IMMUTABLE) 1055 di_flags |= XFS_DIFLAG_IMMUTABLE; 1056 if (xflags & FS_XFLAG_APPEND) 1057 di_flags |= XFS_DIFLAG_APPEND; 1058 if (xflags & FS_XFLAG_SYNC) 1059 di_flags |= XFS_DIFLAG_SYNC; 1060 if (xflags & FS_XFLAG_NOATIME) 1061 di_flags |= XFS_DIFLAG_NOATIME; 1062 if (xflags & FS_XFLAG_NODUMP) 1063 di_flags |= XFS_DIFLAG_NODUMP; 1064 if (xflags & FS_XFLAG_NODEFRAG) 1065 di_flags |= XFS_DIFLAG_NODEFRAG; 1066 if (xflags & FS_XFLAG_FILESTREAM) 1067 di_flags |= XFS_DIFLAG_FILESTREAM; 1068 if (S_ISDIR(VFS_I(ip)->i_mode)) { 1069 if (xflags & FS_XFLAG_RTINHERIT) 1070 di_flags |= XFS_DIFLAG_RTINHERIT; 1071 if (xflags & FS_XFLAG_NOSYMLINKS) 1072 di_flags |= XFS_DIFLAG_NOSYMLINKS; 1073 if (xflags & FS_XFLAG_EXTSZINHERIT) 1074 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 1075 if (xflags & FS_XFLAG_PROJINHERIT) 1076 di_flags |= XFS_DIFLAG_PROJINHERIT; 1077 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 1078 if (xflags & FS_XFLAG_REALTIME) 1079 di_flags |= XFS_DIFLAG_REALTIME; 1080 if (xflags & FS_XFLAG_EXTSIZE) 1081 di_flags |= XFS_DIFLAG_EXTSIZE; 1082 } 1083 1084 return di_flags; 1085 } 1086 1087 STATIC uint64_t 1088 xfs_flags2diflags2( 1089 struct xfs_inode *ip, 1090 unsigned int xflags) 1091 { 1092 uint64_t di_flags2 = 1093 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK); 1094 1095 if (xflags & FS_XFLAG_DAX) 1096 di_flags2 |= XFS_DIFLAG2_DAX; 1097 if (xflags & FS_XFLAG_COWEXTSIZE) 1098 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 1099 1100 return di_flags2; 1101 } 1102 1103 STATIC void 1104 xfs_diflags_to_linux( 1105 struct xfs_inode *ip) 1106 { 1107 struct inode *inode = VFS_I(ip); 1108 unsigned int xflags = xfs_ip2xflags(ip); 1109 1110 if (xflags & FS_XFLAG_IMMUTABLE) 1111 inode->i_flags |= S_IMMUTABLE; 1112 else 1113 inode->i_flags &= ~S_IMMUTABLE; 1114 if (xflags & FS_XFLAG_APPEND) 1115 inode->i_flags |= S_APPEND; 1116 else 1117 inode->i_flags &= ~S_APPEND; 1118 if (xflags & FS_XFLAG_SYNC) 1119 inode->i_flags |= S_SYNC; 1120 else 1121 inode->i_flags &= ~S_SYNC; 1122 if (xflags & FS_XFLAG_NOATIME) 1123 inode->i_flags |= S_NOATIME; 1124 else 1125 inode->i_flags &= ~S_NOATIME; 1126 #if 0 /* disabled until the flag switching races are sorted out */ 1127 if (xflags & FS_XFLAG_DAX) 1128 inode->i_flags |= S_DAX; 1129 else 1130 inode->i_flags &= ~S_DAX; 1131 #endif 1132 } 1133 1134 static int 1135 xfs_ioctl_setattr_xflags( 1136 struct xfs_trans *tp, 1137 struct xfs_inode *ip, 1138 struct fsxattr *fa) 1139 { 1140 struct xfs_mount *mp = ip->i_mount; 1141 uint64_t di_flags2; 1142 1143 /* Can't change realtime flag if any extents are allocated. */ 1144 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1145 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1146 return -EINVAL; 1147 1148 /* If realtime flag is set then must have realtime device */ 1149 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1150 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1151 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1152 return -EINVAL; 1153 } 1154 1155 /* Clear reflink if we are actually able to set the rt flag. */ 1156 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1157 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; 1158 1159 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1160 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1161 return -EINVAL; 1162 1163 /* diflags2 only valid for v3 inodes. */ 1164 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1165 if (di_flags2 && ip->i_d.di_version < 3) 1166 return -EINVAL; 1167 1168 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags); 1169 ip->i_d.di_flags2 = di_flags2; 1170 1171 xfs_diflags_to_linux(ip); 1172 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1173 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1174 XFS_STATS_INC(mp, xs_ig_attrchg); 1175 return 0; 1176 } 1177 1178 /* 1179 * If we are changing DAX flags, we have to ensure the file is clean and any 1180 * cached objects in the address space are invalidated and removed. This 1181 * requires us to lock out other IO and page faults similar to a truncate 1182 * operation. The locks need to be held until the transaction has been committed 1183 * so that the cache invalidation is atomic with respect to the DAX flag 1184 * manipulation. 1185 */ 1186 static int 1187 xfs_ioctl_setattr_dax_invalidate( 1188 struct xfs_inode *ip, 1189 struct fsxattr *fa, 1190 int *join_flags) 1191 { 1192 struct inode *inode = VFS_I(ip); 1193 struct super_block *sb = inode->i_sb; 1194 int error; 1195 1196 *join_flags = 0; 1197 1198 /* 1199 * It is only valid to set the DAX flag on regular files and 1200 * directories on filesystems where the block size is equal to the page 1201 * size. On directories it serves as an inherited hint so we don't 1202 * have to check the device for dax support or flush pagecache. 1203 */ 1204 if (fa->fsx_xflags & FS_XFLAG_DAX) { 1205 struct xfs_buftarg *target = xfs_inode_buftarg(ip); 1206 1207 if (!bdev_dax_supported(target->bt_bdev, sb->s_blocksize)) 1208 return -EINVAL; 1209 } 1210 1211 /* If the DAX state is not changing, we have nothing to do here. */ 1212 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode)) 1213 return 0; 1214 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode)) 1215 return 0; 1216 1217 if (S_ISDIR(inode->i_mode)) 1218 return 0; 1219 1220 /* lock, flush and invalidate mapping in preparation for flag change */ 1221 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1222 error = filemap_write_and_wait(inode->i_mapping); 1223 if (error) 1224 goto out_unlock; 1225 error = invalidate_inode_pages2(inode->i_mapping); 1226 if (error) 1227 goto out_unlock; 1228 1229 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL; 1230 return 0; 1231 1232 out_unlock: 1233 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1234 return error; 1235 1236 } 1237 1238 /* 1239 * Set up the transaction structure for the setattr operation, checking that we 1240 * have permission to do so. On success, return a clean transaction and the 1241 * inode locked exclusively ready for further operation specific checks. On 1242 * failure, return an error without modifying or locking the inode. 1243 * 1244 * The inode might already be IO locked on call. If this is the case, it is 1245 * indicated in @join_flags and we take full responsibility for ensuring they 1246 * are unlocked from now on. Hence if we have an error here, we still have to 1247 * unlock them. Otherwise, once they are joined to the transaction, they will 1248 * be unlocked on commit/cancel. 1249 */ 1250 static struct xfs_trans * 1251 xfs_ioctl_setattr_get_trans( 1252 struct xfs_inode *ip, 1253 int join_flags) 1254 { 1255 struct xfs_mount *mp = ip->i_mount; 1256 struct xfs_trans *tp; 1257 int error = -EROFS; 1258 1259 if (mp->m_flags & XFS_MOUNT_RDONLY) 1260 goto out_unlock; 1261 error = -EIO; 1262 if (XFS_FORCED_SHUTDOWN(mp)) 1263 goto out_unlock; 1264 1265 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1266 if (error) 1267 goto out_unlock; 1268 1269 xfs_ilock(ip, XFS_ILOCK_EXCL); 1270 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags); 1271 join_flags = 0; 1272 1273 /* 1274 * CAP_FOWNER overrides the following restrictions: 1275 * 1276 * The user ID of the calling process must be equal to the file owner 1277 * ID, except in cases where the CAP_FSETID capability is applicable. 1278 */ 1279 if (!inode_owner_or_capable(VFS_I(ip))) { 1280 error = -EPERM; 1281 goto out_cancel; 1282 } 1283 1284 if (mp->m_flags & XFS_MOUNT_WSYNC) 1285 xfs_trans_set_sync(tp); 1286 1287 return tp; 1288 1289 out_cancel: 1290 xfs_trans_cancel(tp); 1291 out_unlock: 1292 if (join_flags) 1293 xfs_iunlock(ip, join_flags); 1294 return ERR_PTR(error); 1295 } 1296 1297 /* 1298 * extent size hint validation is somewhat cumbersome. Rules are: 1299 * 1300 * 1. extent size hint is only valid for directories and regular files 1301 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1302 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1303 * 4. can only be changed on regular files if no extents are allocated 1304 * 5. can be changed on directories at any time 1305 * 6. extsize hint of 0 turns off hints, clears inode flags. 1306 * 7. Extent size must be a multiple of the appropriate block size. 1307 * 8. for non-realtime files, the extent size hint must be limited 1308 * to half the AG size to avoid alignment extending the extent beyond the 1309 * limits of the AG. 1310 * 1311 * Please keep this function in sync with xfs_scrub_inode_extsize. 1312 */ 1313 static int 1314 xfs_ioctl_setattr_check_extsize( 1315 struct xfs_inode *ip, 1316 struct fsxattr *fa) 1317 { 1318 struct xfs_mount *mp = ip->i_mount; 1319 xfs_extlen_t size; 1320 xfs_fsblock_t extsize_fsb; 1321 1322 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents && 1323 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1324 return -EINVAL; 1325 1326 if (fa->fsx_extsize == 0) 1327 return 0; 1328 1329 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1330 if (extsize_fsb > MAXEXTLEN) 1331 return -EINVAL; 1332 1333 if (XFS_IS_REALTIME_INODE(ip) || 1334 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1335 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1336 } else { 1337 size = mp->m_sb.sb_blocksize; 1338 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1339 return -EINVAL; 1340 } 1341 1342 if (fa->fsx_extsize % size) 1343 return -EINVAL; 1344 1345 return 0; 1346 } 1347 1348 /* 1349 * CoW extent size hint validation rules are: 1350 * 1351 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1352 * The inode does not have to have any shared blocks, but it must be a v3. 1353 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1354 * for a directory, the hint is propagated to new files. 1355 * 3. Can be changed on files & directories at any time. 1356 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1357 * 5. Extent size must be a multiple of the appropriate block size. 1358 * 6. The extent size hint must be limited to half the AG size to avoid 1359 * alignment extending the extent beyond the limits of the AG. 1360 * 1361 * Please keep this function in sync with xfs_scrub_inode_cowextsize. 1362 */ 1363 static int 1364 xfs_ioctl_setattr_check_cowextsize( 1365 struct xfs_inode *ip, 1366 struct fsxattr *fa) 1367 { 1368 struct xfs_mount *mp = ip->i_mount; 1369 xfs_extlen_t size; 1370 xfs_fsblock_t cowextsize_fsb; 1371 1372 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1373 return 0; 1374 1375 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) || 1376 ip->i_d.di_version != 3) 1377 return -EINVAL; 1378 1379 if (fa->fsx_cowextsize == 0) 1380 return 0; 1381 1382 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1383 if (cowextsize_fsb > MAXEXTLEN) 1384 return -EINVAL; 1385 1386 size = mp->m_sb.sb_blocksize; 1387 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1388 return -EINVAL; 1389 1390 if (fa->fsx_cowextsize % size) 1391 return -EINVAL; 1392 1393 return 0; 1394 } 1395 1396 static int 1397 xfs_ioctl_setattr_check_projid( 1398 struct xfs_inode *ip, 1399 struct fsxattr *fa) 1400 { 1401 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1402 if (fa->fsx_projid > (uint16_t)-1 && 1403 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1404 return -EINVAL; 1405 return 0; 1406 } 1407 1408 STATIC int 1409 xfs_ioctl_setattr( 1410 xfs_inode_t *ip, 1411 struct fsxattr *fa) 1412 { 1413 struct fsxattr old_fa; 1414 struct xfs_mount *mp = ip->i_mount; 1415 struct xfs_trans *tp; 1416 struct xfs_dquot *udqp = NULL; 1417 struct xfs_dquot *pdqp = NULL; 1418 struct xfs_dquot *olddquot = NULL; 1419 int code; 1420 int join_flags = 0; 1421 1422 trace_xfs_ioctl_setattr(ip); 1423 1424 code = xfs_ioctl_setattr_check_projid(ip, fa); 1425 if (code) 1426 return code; 1427 1428 /* 1429 * If disk quotas is on, we make sure that the dquots do exist on disk, 1430 * before we start any other transactions. Trying to do this later 1431 * is messy. We don't care to take a readlock to look at the ids 1432 * in inode here, because we can't hold it across the trans_reserve. 1433 * If the IDs do change before we take the ilock, we're covered 1434 * because the i_*dquot fields will get updated anyway. 1435 */ 1436 if (XFS_IS_QUOTA_ON(mp)) { 1437 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1438 ip->i_d.di_gid, fa->fsx_projid, 1439 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1440 if (code) 1441 return code; 1442 } 1443 1444 /* 1445 * Changing DAX config may require inode locking for mapping 1446 * invalidation. These need to be held all the way to transaction commit 1447 * or cancel time, so need to be passed through to 1448 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1449 * appropriately. 1450 */ 1451 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags); 1452 if (code) 1453 goto error_free_dquots; 1454 1455 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1456 if (IS_ERR(tp)) { 1457 code = PTR_ERR(tp); 1458 goto error_free_dquots; 1459 } 1460 1461 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1462 ip->i_d.di_projid != fa->fsx_projid) { 1463 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1464 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1465 if (code) /* out of quota */ 1466 goto error_trans_cancel; 1467 } 1468 1469 xfs_fill_fsxattr(ip, false, &old_fa); 1470 code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa); 1471 if (code) 1472 goto error_trans_cancel; 1473 1474 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1475 if (code) 1476 goto error_trans_cancel; 1477 1478 code = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1479 if (code) 1480 goto error_trans_cancel; 1481 1482 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1483 if (code) 1484 goto error_trans_cancel; 1485 1486 /* 1487 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1488 * overrides the following restrictions: 1489 * 1490 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1491 * successful return from chown() 1492 */ 1493 1494 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1495 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1496 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1497 1498 /* Change the ownerships and register project quota modifications */ 1499 if (ip->i_d.di_projid != fa->fsx_projid) { 1500 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1501 olddquot = xfs_qm_vop_chown(tp, ip, 1502 &ip->i_pdquot, pdqp); 1503 } 1504 ASSERT(ip->i_d.di_version > 1); 1505 ip->i_d.di_projid = fa->fsx_projid; 1506 } 1507 1508 /* 1509 * Only set the extent size hint if we've already determined that the 1510 * extent size hint should be set on the inode. If no extent size flags 1511 * are set on the inode then unconditionally clear the extent size hint. 1512 */ 1513 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1514 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1515 else 1516 ip->i_d.di_extsize = 0; 1517 if (ip->i_d.di_version == 3 && 1518 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) 1519 ip->i_d.di_cowextsize = fa->fsx_cowextsize >> 1520 mp->m_sb.sb_blocklog; 1521 else 1522 ip->i_d.di_cowextsize = 0; 1523 1524 code = xfs_trans_commit(tp); 1525 1526 /* 1527 * Release any dquot(s) the inode had kept before chown. 1528 */ 1529 xfs_qm_dqrele(olddquot); 1530 xfs_qm_dqrele(udqp); 1531 xfs_qm_dqrele(pdqp); 1532 1533 return code; 1534 1535 error_trans_cancel: 1536 xfs_trans_cancel(tp); 1537 error_free_dquots: 1538 xfs_qm_dqrele(udqp); 1539 xfs_qm_dqrele(pdqp); 1540 return code; 1541 } 1542 1543 STATIC int 1544 xfs_ioc_fssetxattr( 1545 xfs_inode_t *ip, 1546 struct file *filp, 1547 void __user *arg) 1548 { 1549 struct fsxattr fa; 1550 int error; 1551 1552 if (copy_from_user(&fa, arg, sizeof(fa))) 1553 return -EFAULT; 1554 1555 error = mnt_want_write_file(filp); 1556 if (error) 1557 return error; 1558 error = xfs_ioctl_setattr(ip, &fa); 1559 mnt_drop_write_file(filp); 1560 return error; 1561 } 1562 1563 STATIC int 1564 xfs_ioc_getxflags( 1565 xfs_inode_t *ip, 1566 void __user *arg) 1567 { 1568 unsigned int flags; 1569 1570 flags = xfs_di2lxflags(ip->i_d.di_flags); 1571 if (copy_to_user(arg, &flags, sizeof(flags))) 1572 return -EFAULT; 1573 return 0; 1574 } 1575 1576 STATIC int 1577 xfs_ioc_setxflags( 1578 struct xfs_inode *ip, 1579 struct file *filp, 1580 void __user *arg) 1581 { 1582 struct xfs_trans *tp; 1583 struct fsxattr fa; 1584 struct fsxattr old_fa; 1585 unsigned int flags; 1586 int join_flags = 0; 1587 int error; 1588 1589 if (copy_from_user(&flags, arg, sizeof(flags))) 1590 return -EFAULT; 1591 1592 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1593 FS_NOATIME_FL | FS_NODUMP_FL | \ 1594 FS_SYNC_FL)) 1595 return -EOPNOTSUPP; 1596 1597 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1598 1599 error = mnt_want_write_file(filp); 1600 if (error) 1601 return error; 1602 1603 /* 1604 * Changing DAX config may require inode locking for mapping 1605 * invalidation. These need to be held all the way to transaction commit 1606 * or cancel time, so need to be passed through to 1607 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1608 * appropriately. 1609 */ 1610 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags); 1611 if (error) 1612 goto out_drop_write; 1613 1614 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1615 if (IS_ERR(tp)) { 1616 error = PTR_ERR(tp); 1617 goto out_drop_write; 1618 } 1619 1620 xfs_fill_fsxattr(ip, false, &old_fa); 1621 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa); 1622 if (error) { 1623 xfs_trans_cancel(tp); 1624 goto out_drop_write; 1625 } 1626 1627 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1628 if (error) { 1629 xfs_trans_cancel(tp); 1630 goto out_drop_write; 1631 } 1632 1633 error = xfs_trans_commit(tp); 1634 out_drop_write: 1635 mnt_drop_write_file(filp); 1636 return error; 1637 } 1638 1639 static bool 1640 xfs_getbmap_format( 1641 struct kgetbmap *p, 1642 struct getbmapx __user *u, 1643 size_t recsize) 1644 { 1645 if (put_user(p->bmv_offset, &u->bmv_offset) || 1646 put_user(p->bmv_block, &u->bmv_block) || 1647 put_user(p->bmv_length, &u->bmv_length) || 1648 put_user(0, &u->bmv_count) || 1649 put_user(0, &u->bmv_entries)) 1650 return false; 1651 if (recsize < sizeof(struct getbmapx)) 1652 return true; 1653 if (put_user(0, &u->bmv_iflags) || 1654 put_user(p->bmv_oflags, &u->bmv_oflags) || 1655 put_user(0, &u->bmv_unused1) || 1656 put_user(0, &u->bmv_unused2)) 1657 return false; 1658 return true; 1659 } 1660 1661 STATIC int 1662 xfs_ioc_getbmap( 1663 struct file *file, 1664 unsigned int cmd, 1665 void __user *arg) 1666 { 1667 struct getbmapx bmx = { 0 }; 1668 struct kgetbmap *buf; 1669 size_t recsize; 1670 int error, i; 1671 1672 switch (cmd) { 1673 case XFS_IOC_GETBMAPA: 1674 bmx.bmv_iflags = BMV_IF_ATTRFORK; 1675 /*FALLTHRU*/ 1676 case XFS_IOC_GETBMAP: 1677 if (file->f_mode & FMODE_NOCMTIME) 1678 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1679 /* struct getbmap is a strict subset of struct getbmapx. */ 1680 recsize = sizeof(struct getbmap); 1681 break; 1682 case XFS_IOC_GETBMAPX: 1683 recsize = sizeof(struct getbmapx); 1684 break; 1685 default: 1686 return -EINVAL; 1687 } 1688 1689 if (copy_from_user(&bmx, arg, recsize)) 1690 return -EFAULT; 1691 1692 if (bmx.bmv_count < 2) 1693 return -EINVAL; 1694 if (bmx.bmv_count > ULONG_MAX / recsize) 1695 return -ENOMEM; 1696 1697 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0); 1698 if (!buf) 1699 return -ENOMEM; 1700 1701 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 1702 if (error) 1703 goto out_free_buf; 1704 1705 error = -EFAULT; 1706 if (copy_to_user(arg, &bmx, recsize)) 1707 goto out_free_buf; 1708 arg += recsize; 1709 1710 for (i = 0; i < bmx.bmv_entries; i++) { 1711 if (!xfs_getbmap_format(buf + i, arg, recsize)) 1712 goto out_free_buf; 1713 arg += recsize; 1714 } 1715 1716 error = 0; 1717 out_free_buf: 1718 kmem_free(buf); 1719 return error; 1720 } 1721 1722 struct getfsmap_info { 1723 struct xfs_mount *mp; 1724 struct fsmap_head __user *data; 1725 unsigned int idx; 1726 __u32 last_flags; 1727 }; 1728 1729 STATIC int 1730 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv) 1731 { 1732 struct getfsmap_info *info = priv; 1733 struct fsmap fm; 1734 1735 trace_xfs_getfsmap_mapping(info->mp, xfm); 1736 1737 info->last_flags = xfm->fmr_flags; 1738 xfs_fsmap_from_internal(&fm, xfm); 1739 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm, 1740 sizeof(struct fsmap))) 1741 return -EFAULT; 1742 1743 return 0; 1744 } 1745 1746 STATIC int 1747 xfs_ioc_getfsmap( 1748 struct xfs_inode *ip, 1749 struct fsmap_head __user *arg) 1750 { 1751 struct getfsmap_info info = { NULL }; 1752 struct xfs_fsmap_head xhead = {0}; 1753 struct fsmap_head head; 1754 bool aborted = false; 1755 int error; 1756 1757 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1758 return -EFAULT; 1759 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1760 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1761 sizeof(head.fmh_keys[0].fmr_reserved)) || 1762 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1763 sizeof(head.fmh_keys[1].fmr_reserved))) 1764 return -EINVAL; 1765 1766 xhead.fmh_iflags = head.fmh_iflags; 1767 xhead.fmh_count = head.fmh_count; 1768 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1769 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1770 1771 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1772 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1773 1774 info.mp = ip->i_mount; 1775 info.data = arg; 1776 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info); 1777 if (error == -ECANCELED) { 1778 error = 0; 1779 aborted = true; 1780 } else if (error) 1781 return error; 1782 1783 /* If we didn't abort, set the "last" flag in the last fmx */ 1784 if (!aborted && info.idx) { 1785 info.last_flags |= FMR_OF_LAST; 1786 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags, 1787 &info.last_flags, sizeof(info.last_flags))) 1788 return -EFAULT; 1789 } 1790 1791 /* copy back header */ 1792 head.fmh_entries = xhead.fmh_entries; 1793 head.fmh_oflags = xhead.fmh_oflags; 1794 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 1795 return -EFAULT; 1796 1797 return 0; 1798 } 1799 1800 STATIC int 1801 xfs_ioc_scrub_metadata( 1802 struct xfs_inode *ip, 1803 void __user *arg) 1804 { 1805 struct xfs_scrub_metadata scrub; 1806 int error; 1807 1808 if (!capable(CAP_SYS_ADMIN)) 1809 return -EPERM; 1810 1811 if (copy_from_user(&scrub, arg, sizeof(scrub))) 1812 return -EFAULT; 1813 1814 error = xfs_scrub_metadata(ip, &scrub); 1815 if (error) 1816 return error; 1817 1818 if (copy_to_user(arg, &scrub, sizeof(scrub))) 1819 return -EFAULT; 1820 1821 return 0; 1822 } 1823 1824 int 1825 xfs_ioc_swapext( 1826 xfs_swapext_t *sxp) 1827 { 1828 xfs_inode_t *ip, *tip; 1829 struct fd f, tmp; 1830 int error = 0; 1831 1832 /* Pull information for the target fd */ 1833 f = fdget((int)sxp->sx_fdtarget); 1834 if (!f.file) { 1835 error = -EINVAL; 1836 goto out; 1837 } 1838 1839 if (!(f.file->f_mode & FMODE_WRITE) || 1840 !(f.file->f_mode & FMODE_READ) || 1841 (f.file->f_flags & O_APPEND)) { 1842 error = -EBADF; 1843 goto out_put_file; 1844 } 1845 1846 tmp = fdget((int)sxp->sx_fdtmp); 1847 if (!tmp.file) { 1848 error = -EINVAL; 1849 goto out_put_file; 1850 } 1851 1852 if (!(tmp.file->f_mode & FMODE_WRITE) || 1853 !(tmp.file->f_mode & FMODE_READ) || 1854 (tmp.file->f_flags & O_APPEND)) { 1855 error = -EBADF; 1856 goto out_put_tmp_file; 1857 } 1858 1859 if (IS_SWAPFILE(file_inode(f.file)) || 1860 IS_SWAPFILE(file_inode(tmp.file))) { 1861 error = -EINVAL; 1862 goto out_put_tmp_file; 1863 } 1864 1865 /* 1866 * We need to ensure that the fds passed in point to XFS inodes 1867 * before we cast and access them as XFS structures as we have no 1868 * control over what the user passes us here. 1869 */ 1870 if (f.file->f_op != &xfs_file_operations || 1871 tmp.file->f_op != &xfs_file_operations) { 1872 error = -EINVAL; 1873 goto out_put_tmp_file; 1874 } 1875 1876 ip = XFS_I(file_inode(f.file)); 1877 tip = XFS_I(file_inode(tmp.file)); 1878 1879 if (ip->i_mount != tip->i_mount) { 1880 error = -EINVAL; 1881 goto out_put_tmp_file; 1882 } 1883 1884 if (ip->i_ino == tip->i_ino) { 1885 error = -EINVAL; 1886 goto out_put_tmp_file; 1887 } 1888 1889 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1890 error = -EIO; 1891 goto out_put_tmp_file; 1892 } 1893 1894 error = xfs_swap_extents(ip, tip, sxp); 1895 1896 out_put_tmp_file: 1897 fdput(tmp); 1898 out_put_file: 1899 fdput(f); 1900 out: 1901 return error; 1902 } 1903 1904 static int 1905 xfs_ioc_getlabel( 1906 struct xfs_mount *mp, 1907 char __user *user_label) 1908 { 1909 struct xfs_sb *sbp = &mp->m_sb; 1910 char label[XFSLABEL_MAX + 1]; 1911 1912 /* Paranoia */ 1913 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 1914 1915 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 1916 memset(label, 0, sizeof(label)); 1917 spin_lock(&mp->m_sb_lock); 1918 strncpy(label, sbp->sb_fname, XFSLABEL_MAX); 1919 spin_unlock(&mp->m_sb_lock); 1920 1921 if (copy_to_user(user_label, label, sizeof(label))) 1922 return -EFAULT; 1923 return 0; 1924 } 1925 1926 static int 1927 xfs_ioc_setlabel( 1928 struct file *filp, 1929 struct xfs_mount *mp, 1930 char __user *newlabel) 1931 { 1932 struct xfs_sb *sbp = &mp->m_sb; 1933 char label[XFSLABEL_MAX + 1]; 1934 size_t len; 1935 int error; 1936 1937 if (!capable(CAP_SYS_ADMIN)) 1938 return -EPERM; 1939 /* 1940 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 1941 * smaller, at 12 bytes. We copy one more to be sure we find the 1942 * (required) NULL character to test the incoming label length. 1943 * NB: The on disk label doesn't need to be null terminated. 1944 */ 1945 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 1946 return -EFAULT; 1947 len = strnlen(label, XFSLABEL_MAX + 1); 1948 if (len > sizeof(sbp->sb_fname)) 1949 return -EINVAL; 1950 1951 error = mnt_want_write_file(filp); 1952 if (error) 1953 return error; 1954 1955 spin_lock(&mp->m_sb_lock); 1956 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 1957 memcpy(sbp->sb_fname, label, len); 1958 spin_unlock(&mp->m_sb_lock); 1959 1960 /* 1961 * Now we do several things to satisfy userspace. 1962 * In addition to normal logging of the primary superblock, we also 1963 * immediately write these changes to sector zero for the primary, then 1964 * update all backup supers (as xfs_db does for a label change), then 1965 * invalidate the block device page cache. This is so that any prior 1966 * buffered reads from userspace (i.e. from blkid) are invalidated, 1967 * and userspace will see the newly-written label. 1968 */ 1969 error = xfs_sync_sb_buf(mp); 1970 if (error) 1971 goto out; 1972 /* 1973 * growfs also updates backup supers so lock against that. 1974 */ 1975 mutex_lock(&mp->m_growlock); 1976 error = xfs_update_secondary_sbs(mp); 1977 mutex_unlock(&mp->m_growlock); 1978 1979 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 1980 1981 out: 1982 mnt_drop_write_file(filp); 1983 return error; 1984 } 1985 1986 /* 1987 * Note: some of the ioctl's return positive numbers as a 1988 * byte count indicating success, such as readlink_by_handle. 1989 * So we don't "sign flip" like most other routines. This means 1990 * true errors need to be returned as a negative value. 1991 */ 1992 long 1993 xfs_file_ioctl( 1994 struct file *filp, 1995 unsigned int cmd, 1996 unsigned long p) 1997 { 1998 struct inode *inode = file_inode(filp); 1999 struct xfs_inode *ip = XFS_I(inode); 2000 struct xfs_mount *mp = ip->i_mount; 2001 void __user *arg = (void __user *)p; 2002 int error; 2003 2004 trace_xfs_file_ioctl(ip); 2005 2006 switch (cmd) { 2007 case FITRIM: 2008 return xfs_ioc_trim(mp, arg); 2009 case FS_IOC_GETFSLABEL: 2010 return xfs_ioc_getlabel(mp, arg); 2011 case FS_IOC_SETFSLABEL: 2012 return xfs_ioc_setlabel(filp, mp, arg); 2013 case XFS_IOC_ALLOCSP: 2014 case XFS_IOC_FREESP: 2015 case XFS_IOC_ALLOCSP64: 2016 case XFS_IOC_FREESP64: { 2017 xfs_flock64_t bf; 2018 2019 if (copy_from_user(&bf, arg, sizeof(bf))) 2020 return -EFAULT; 2021 return xfs_ioc_space(filp, &bf); 2022 } 2023 case XFS_IOC_DIOINFO: { 2024 struct xfs_buftarg *target = xfs_inode_buftarg(ip); 2025 struct dioattr da; 2026 2027 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 2028 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 2029 2030 if (copy_to_user(arg, &da, sizeof(da))) 2031 return -EFAULT; 2032 return 0; 2033 } 2034 2035 case XFS_IOC_FSBULKSTAT_SINGLE: 2036 case XFS_IOC_FSBULKSTAT: 2037 case XFS_IOC_FSINUMBERS: 2038 return xfs_ioc_fsbulkstat(mp, cmd, arg); 2039 2040 case XFS_IOC_BULKSTAT: 2041 return xfs_ioc_bulkstat(mp, cmd, arg); 2042 case XFS_IOC_INUMBERS: 2043 return xfs_ioc_inumbers(mp, cmd, arg); 2044 2045 case XFS_IOC_FSGEOMETRY_V1: 2046 return xfs_ioc_fsgeometry(mp, arg, 3); 2047 case XFS_IOC_FSGEOMETRY_V4: 2048 return xfs_ioc_fsgeometry(mp, arg, 4); 2049 case XFS_IOC_FSGEOMETRY: 2050 return xfs_ioc_fsgeometry(mp, arg, 5); 2051 2052 case XFS_IOC_AG_GEOMETRY: 2053 return xfs_ioc_ag_geometry(mp, arg); 2054 2055 case XFS_IOC_GETVERSION: 2056 return put_user(inode->i_generation, (int __user *)arg); 2057 2058 case XFS_IOC_FSGETXATTR: 2059 return xfs_ioc_fsgetxattr(ip, 0, arg); 2060 case XFS_IOC_FSGETXATTRA: 2061 return xfs_ioc_fsgetxattr(ip, 1, arg); 2062 case XFS_IOC_FSSETXATTR: 2063 return xfs_ioc_fssetxattr(ip, filp, arg); 2064 case XFS_IOC_GETXFLAGS: 2065 return xfs_ioc_getxflags(ip, arg); 2066 case XFS_IOC_SETXFLAGS: 2067 return xfs_ioc_setxflags(ip, filp, arg); 2068 2069 case XFS_IOC_GETBMAP: 2070 case XFS_IOC_GETBMAPA: 2071 case XFS_IOC_GETBMAPX: 2072 return xfs_ioc_getbmap(filp, cmd, arg); 2073 2074 case FS_IOC_GETFSMAP: 2075 return xfs_ioc_getfsmap(ip, arg); 2076 2077 case XFS_IOC_SCRUB_METADATA: 2078 return xfs_ioc_scrub_metadata(ip, arg); 2079 2080 case XFS_IOC_FD_TO_HANDLE: 2081 case XFS_IOC_PATH_TO_HANDLE: 2082 case XFS_IOC_PATH_TO_FSHANDLE: { 2083 xfs_fsop_handlereq_t hreq; 2084 2085 if (copy_from_user(&hreq, arg, sizeof(hreq))) 2086 return -EFAULT; 2087 return xfs_find_handle(cmd, &hreq); 2088 } 2089 case XFS_IOC_OPEN_BY_HANDLE: { 2090 xfs_fsop_handlereq_t hreq; 2091 2092 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2093 return -EFAULT; 2094 return xfs_open_by_handle(filp, &hreq); 2095 } 2096 2097 case XFS_IOC_READLINK_BY_HANDLE: { 2098 xfs_fsop_handlereq_t hreq; 2099 2100 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2101 return -EFAULT; 2102 return xfs_readlink_by_handle(filp, &hreq); 2103 } 2104 case XFS_IOC_ATTRLIST_BY_HANDLE: 2105 return xfs_attrlist_by_handle(filp, arg); 2106 2107 case XFS_IOC_ATTRMULTI_BY_HANDLE: 2108 return xfs_attrmulti_by_handle(filp, arg); 2109 2110 case XFS_IOC_SWAPEXT: { 2111 struct xfs_swapext sxp; 2112 2113 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 2114 return -EFAULT; 2115 error = mnt_want_write_file(filp); 2116 if (error) 2117 return error; 2118 error = xfs_ioc_swapext(&sxp); 2119 mnt_drop_write_file(filp); 2120 return error; 2121 } 2122 2123 case XFS_IOC_FSCOUNTS: { 2124 xfs_fsop_counts_t out; 2125 2126 xfs_fs_counts(mp, &out); 2127 2128 if (copy_to_user(arg, &out, sizeof(out))) 2129 return -EFAULT; 2130 return 0; 2131 } 2132 2133 case XFS_IOC_SET_RESBLKS: { 2134 xfs_fsop_resblks_t inout; 2135 uint64_t in; 2136 2137 if (!capable(CAP_SYS_ADMIN)) 2138 return -EPERM; 2139 2140 if (mp->m_flags & XFS_MOUNT_RDONLY) 2141 return -EROFS; 2142 2143 if (copy_from_user(&inout, arg, sizeof(inout))) 2144 return -EFAULT; 2145 2146 error = mnt_want_write_file(filp); 2147 if (error) 2148 return error; 2149 2150 /* input parameter is passed in resblks field of structure */ 2151 in = inout.resblks; 2152 error = xfs_reserve_blocks(mp, &in, &inout); 2153 mnt_drop_write_file(filp); 2154 if (error) 2155 return error; 2156 2157 if (copy_to_user(arg, &inout, sizeof(inout))) 2158 return -EFAULT; 2159 return 0; 2160 } 2161 2162 case XFS_IOC_GET_RESBLKS: { 2163 xfs_fsop_resblks_t out; 2164 2165 if (!capable(CAP_SYS_ADMIN)) 2166 return -EPERM; 2167 2168 error = xfs_reserve_blocks(mp, NULL, &out); 2169 if (error) 2170 return error; 2171 2172 if (copy_to_user(arg, &out, sizeof(out))) 2173 return -EFAULT; 2174 2175 return 0; 2176 } 2177 2178 case XFS_IOC_FSGROWFSDATA: { 2179 xfs_growfs_data_t in; 2180 2181 if (copy_from_user(&in, arg, sizeof(in))) 2182 return -EFAULT; 2183 2184 error = mnt_want_write_file(filp); 2185 if (error) 2186 return error; 2187 error = xfs_growfs_data(mp, &in); 2188 mnt_drop_write_file(filp); 2189 return error; 2190 } 2191 2192 case XFS_IOC_FSGROWFSLOG: { 2193 xfs_growfs_log_t in; 2194 2195 if (copy_from_user(&in, arg, sizeof(in))) 2196 return -EFAULT; 2197 2198 error = mnt_want_write_file(filp); 2199 if (error) 2200 return error; 2201 error = xfs_growfs_log(mp, &in); 2202 mnt_drop_write_file(filp); 2203 return error; 2204 } 2205 2206 case XFS_IOC_FSGROWFSRT: { 2207 xfs_growfs_rt_t in; 2208 2209 if (copy_from_user(&in, arg, sizeof(in))) 2210 return -EFAULT; 2211 2212 error = mnt_want_write_file(filp); 2213 if (error) 2214 return error; 2215 error = xfs_growfs_rt(mp, &in); 2216 mnt_drop_write_file(filp); 2217 return error; 2218 } 2219 2220 case XFS_IOC_GOINGDOWN: { 2221 uint32_t in; 2222 2223 if (!capable(CAP_SYS_ADMIN)) 2224 return -EPERM; 2225 2226 if (get_user(in, (uint32_t __user *)arg)) 2227 return -EFAULT; 2228 2229 return xfs_fs_goingdown(mp, in); 2230 } 2231 2232 case XFS_IOC_ERROR_INJECTION: { 2233 xfs_error_injection_t in; 2234 2235 if (!capable(CAP_SYS_ADMIN)) 2236 return -EPERM; 2237 2238 if (copy_from_user(&in, arg, sizeof(in))) 2239 return -EFAULT; 2240 2241 return xfs_errortag_add(mp, in.errtag); 2242 } 2243 2244 case XFS_IOC_ERROR_CLEARALL: 2245 if (!capable(CAP_SYS_ADMIN)) 2246 return -EPERM; 2247 2248 return xfs_errortag_clearall(mp); 2249 2250 case XFS_IOC_FREE_EOFBLOCKS: { 2251 struct xfs_fs_eofblocks eofb; 2252 struct xfs_eofblocks keofb; 2253 2254 if (!capable(CAP_SYS_ADMIN)) 2255 return -EPERM; 2256 2257 if (mp->m_flags & XFS_MOUNT_RDONLY) 2258 return -EROFS; 2259 2260 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2261 return -EFAULT; 2262 2263 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 2264 if (error) 2265 return error; 2266 2267 return xfs_icache_free_eofblocks(mp, &keofb); 2268 } 2269 2270 default: 2271 return -ENOTTY; 2272 } 2273 } 2274