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 37 #include <linux/mount.h> 38 #include <linux/namei.h> 39 40 /* 41 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 42 * a file or fs handle. 43 * 44 * XFS_IOC_PATH_TO_FSHANDLE 45 * returns fs handle for a mount point or path within that mount point 46 * XFS_IOC_FD_TO_HANDLE 47 * returns full handle for a FD opened in user space 48 * XFS_IOC_PATH_TO_HANDLE 49 * returns full handle for a path 50 */ 51 int 52 xfs_find_handle( 53 unsigned int cmd, 54 xfs_fsop_handlereq_t *hreq) 55 { 56 int hsize; 57 xfs_handle_t handle; 58 struct inode *inode; 59 struct fd f = {NULL}; 60 struct path path; 61 int error; 62 struct xfs_inode *ip; 63 64 if (cmd == XFS_IOC_FD_TO_HANDLE) { 65 f = fdget(hreq->fd); 66 if (!f.file) 67 return -EBADF; 68 inode = file_inode(f.file); 69 } else { 70 error = user_path_at(AT_FDCWD, hreq->path, 0, &path); 71 if (error) 72 return error; 73 inode = d_inode(path.dentry); 74 } 75 ip = XFS_I(inode); 76 77 /* 78 * We can only generate handles for inodes residing on a XFS filesystem, 79 * and only for regular files, directories or symbolic links. 80 */ 81 error = -EINVAL; 82 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 83 goto out_put; 84 85 error = -EBADF; 86 if (!S_ISREG(inode->i_mode) && 87 !S_ISDIR(inode->i_mode) && 88 !S_ISLNK(inode->i_mode)) 89 goto out_put; 90 91 92 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 93 94 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 95 /* 96 * This handle only contains an fsid, zero the rest. 97 */ 98 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 99 hsize = sizeof(xfs_fsid_t); 100 } else { 101 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 102 sizeof(handle.ha_fid.fid_len); 103 handle.ha_fid.fid_pad = 0; 104 handle.ha_fid.fid_gen = inode->i_generation; 105 handle.ha_fid.fid_ino = ip->i_ino; 106 hsize = sizeof(xfs_handle_t); 107 } 108 109 error = -EFAULT; 110 if (copy_to_user(hreq->ohandle, &handle, hsize) || 111 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 112 goto out_put; 113 114 error = 0; 115 116 out_put: 117 if (cmd == XFS_IOC_FD_TO_HANDLE) 118 fdput(f); 119 else 120 path_put(&path); 121 return error; 122 } 123 124 /* 125 * No need to do permission checks on the various pathname components 126 * as the handle operations are privileged. 127 */ 128 STATIC int 129 xfs_handle_acceptable( 130 void *context, 131 struct dentry *dentry) 132 { 133 return 1; 134 } 135 136 /* 137 * Convert userspace handle data into a dentry. 138 */ 139 struct dentry * 140 xfs_handle_to_dentry( 141 struct file *parfilp, 142 void __user *uhandle, 143 u32 hlen) 144 { 145 xfs_handle_t handle; 146 struct xfs_fid64 fid; 147 148 /* 149 * Only allow handle opens under a directory. 150 */ 151 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 152 return ERR_PTR(-ENOTDIR); 153 154 if (hlen != sizeof(xfs_handle_t)) 155 return ERR_PTR(-EINVAL); 156 if (copy_from_user(&handle, uhandle, hlen)) 157 return ERR_PTR(-EFAULT); 158 if (handle.ha_fid.fid_len != 159 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 160 return ERR_PTR(-EINVAL); 161 162 memset(&fid, 0, sizeof(struct fid)); 163 fid.ino = handle.ha_fid.fid_ino; 164 fid.gen = handle.ha_fid.fid_gen; 165 166 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 167 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 168 xfs_handle_acceptable, NULL); 169 } 170 171 STATIC struct dentry * 172 xfs_handlereq_to_dentry( 173 struct file *parfilp, 174 xfs_fsop_handlereq_t *hreq) 175 { 176 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 177 } 178 179 int 180 xfs_open_by_handle( 181 struct file *parfilp, 182 xfs_fsop_handlereq_t *hreq) 183 { 184 const struct cred *cred = current_cred(); 185 int error; 186 int fd; 187 int permflag; 188 struct file *filp; 189 struct inode *inode; 190 struct dentry *dentry; 191 fmode_t fmode; 192 struct path path; 193 194 if (!capable(CAP_SYS_ADMIN)) 195 return -EPERM; 196 197 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 198 if (IS_ERR(dentry)) 199 return PTR_ERR(dentry); 200 inode = d_inode(dentry); 201 202 /* Restrict xfs_open_by_handle to directories & regular files. */ 203 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 204 error = -EPERM; 205 goto out_dput; 206 } 207 208 #if BITS_PER_LONG != 32 209 hreq->oflags |= O_LARGEFILE; 210 #endif 211 212 permflag = hreq->oflags; 213 fmode = OPEN_FMODE(permflag); 214 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 215 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 216 error = -EPERM; 217 goto out_dput; 218 } 219 220 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 221 error = -EPERM; 222 goto out_dput; 223 } 224 225 /* Can't write directories. */ 226 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 227 error = -EISDIR; 228 goto out_dput; 229 } 230 231 fd = get_unused_fd_flags(0); 232 if (fd < 0) { 233 error = fd; 234 goto out_dput; 235 } 236 237 path.mnt = parfilp->f_path.mnt; 238 path.dentry = dentry; 239 filp = dentry_open(&path, hreq->oflags, cred); 240 dput(dentry); 241 if (IS_ERR(filp)) { 242 put_unused_fd(fd); 243 return PTR_ERR(filp); 244 } 245 246 if (S_ISREG(inode->i_mode)) { 247 filp->f_flags |= O_NOATIME; 248 filp->f_mode |= FMODE_NOCMTIME; 249 } 250 251 fd_install(fd, filp); 252 return fd; 253 254 out_dput: 255 dput(dentry); 256 return error; 257 } 258 259 int 260 xfs_readlink_by_handle( 261 struct file *parfilp, 262 xfs_fsop_handlereq_t *hreq) 263 { 264 struct dentry *dentry; 265 __u32 olen; 266 int error; 267 268 if (!capable(CAP_SYS_ADMIN)) 269 return -EPERM; 270 271 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 272 if (IS_ERR(dentry)) 273 return PTR_ERR(dentry); 274 275 /* Restrict this handle operation to symlinks only. */ 276 if (!d_is_symlink(dentry)) { 277 error = -EINVAL; 278 goto out_dput; 279 } 280 281 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 282 error = -EFAULT; 283 goto out_dput; 284 } 285 286 error = vfs_readlink(dentry, hreq->ohandle, olen); 287 288 out_dput: 289 dput(dentry); 290 return error; 291 } 292 293 int 294 xfs_set_dmattrs( 295 xfs_inode_t *ip, 296 uint evmask, 297 uint16_t state) 298 { 299 xfs_mount_t *mp = ip->i_mount; 300 xfs_trans_t *tp; 301 int error; 302 303 if (!capable(CAP_SYS_ADMIN)) 304 return -EPERM; 305 306 if (XFS_FORCED_SHUTDOWN(mp)) 307 return -EIO; 308 309 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 310 if (error) 311 return error; 312 313 xfs_ilock(ip, XFS_ILOCK_EXCL); 314 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 315 316 ip->i_d.di_dmevmask = evmask; 317 ip->i_d.di_dmstate = state; 318 319 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 320 error = xfs_trans_commit(tp); 321 322 return error; 323 } 324 325 STATIC int 326 xfs_fssetdm_by_handle( 327 struct file *parfilp, 328 void __user *arg) 329 { 330 int error; 331 struct fsdmidata fsd; 332 xfs_fsop_setdm_handlereq_t dmhreq; 333 struct dentry *dentry; 334 335 if (!capable(CAP_MKNOD)) 336 return -EPERM; 337 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) 338 return -EFAULT; 339 340 error = mnt_want_write_file(parfilp); 341 if (error) 342 return error; 343 344 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); 345 if (IS_ERR(dentry)) { 346 mnt_drop_write_file(parfilp); 347 return PTR_ERR(dentry); 348 } 349 350 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) { 351 error = -EPERM; 352 goto out; 353 } 354 355 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { 356 error = -EFAULT; 357 goto out; 358 } 359 360 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask, 361 fsd.fsd_dmstate); 362 363 out: 364 mnt_drop_write_file(parfilp); 365 dput(dentry); 366 return error; 367 } 368 369 STATIC int 370 xfs_attrlist_by_handle( 371 struct file *parfilp, 372 void __user *arg) 373 { 374 int error = -ENOMEM; 375 attrlist_cursor_kern_t *cursor; 376 struct xfs_fsop_attrlist_handlereq __user *p = arg; 377 xfs_fsop_attrlist_handlereq_t al_hreq; 378 struct dentry *dentry; 379 char *kbuf; 380 381 if (!capable(CAP_SYS_ADMIN)) 382 return -EPERM; 383 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 384 return -EFAULT; 385 if (al_hreq.buflen < sizeof(struct attrlist) || 386 al_hreq.buflen > XFS_XATTR_LIST_MAX) 387 return -EINVAL; 388 389 /* 390 * Reject flags, only allow namespaces. 391 */ 392 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 393 return -EINVAL; 394 395 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 396 if (IS_ERR(dentry)) 397 return PTR_ERR(dentry); 398 399 kbuf = kmem_zalloc_large(al_hreq.buflen, 0); 400 if (!kbuf) 401 goto out_dput; 402 403 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 404 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen, 405 al_hreq.flags, cursor); 406 if (error) 407 goto out_kfree; 408 409 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) { 410 error = -EFAULT; 411 goto out_kfree; 412 } 413 414 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 415 error = -EFAULT; 416 417 out_kfree: 418 kmem_free(kbuf); 419 out_dput: 420 dput(dentry); 421 return error; 422 } 423 424 int 425 xfs_attrmulti_attr_get( 426 struct inode *inode, 427 unsigned char *name, 428 unsigned char __user *ubuf, 429 uint32_t *len, 430 uint32_t flags) 431 { 432 unsigned char *kbuf; 433 int error = -EFAULT; 434 435 if (*len > XFS_XATTR_SIZE_MAX) 436 return -EINVAL; 437 kbuf = kmem_zalloc_large(*len, 0); 438 if (!kbuf) 439 return -ENOMEM; 440 441 error = xfs_attr_get(XFS_I(inode), name, &kbuf, (int *)len, flags); 442 if (error) 443 goto out_kfree; 444 445 if (copy_to_user(ubuf, kbuf, *len)) 446 error = -EFAULT; 447 448 out_kfree: 449 kmem_free(kbuf); 450 return error; 451 } 452 453 int 454 xfs_attrmulti_attr_set( 455 struct inode *inode, 456 unsigned char *name, 457 const unsigned char __user *ubuf, 458 uint32_t len, 459 uint32_t flags) 460 { 461 unsigned char *kbuf; 462 int error; 463 464 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 465 return -EPERM; 466 if (len > XFS_XATTR_SIZE_MAX) 467 return -EINVAL; 468 469 kbuf = memdup_user(ubuf, len); 470 if (IS_ERR(kbuf)) 471 return PTR_ERR(kbuf); 472 473 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 474 if (!error) 475 xfs_forget_acl(inode, name, flags); 476 kfree(kbuf); 477 return error; 478 } 479 480 int 481 xfs_attrmulti_attr_remove( 482 struct inode *inode, 483 unsigned char *name, 484 uint32_t flags) 485 { 486 int error; 487 488 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 489 return -EPERM; 490 error = xfs_attr_remove(XFS_I(inode), name, flags); 491 if (!error) 492 xfs_forget_acl(inode, name, flags); 493 return error; 494 } 495 496 STATIC int 497 xfs_attrmulti_by_handle( 498 struct file *parfilp, 499 void __user *arg) 500 { 501 int error; 502 xfs_attr_multiop_t *ops; 503 xfs_fsop_attrmulti_handlereq_t am_hreq; 504 struct dentry *dentry; 505 unsigned int i, size; 506 unsigned char *attr_name; 507 508 if (!capable(CAP_SYS_ADMIN)) 509 return -EPERM; 510 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 511 return -EFAULT; 512 513 /* overflow check */ 514 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 515 return -E2BIG; 516 517 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 518 if (IS_ERR(dentry)) 519 return PTR_ERR(dentry); 520 521 error = -E2BIG; 522 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 523 if (!size || size > 16 * PAGE_SIZE) 524 goto out_dput; 525 526 ops = memdup_user(am_hreq.ops, size); 527 if (IS_ERR(ops)) { 528 error = PTR_ERR(ops); 529 goto out_dput; 530 } 531 532 error = -ENOMEM; 533 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 534 if (!attr_name) 535 goto out_kfree_ops; 536 537 error = 0; 538 for (i = 0; i < am_hreq.opcount; i++) { 539 ops[i].am_error = strncpy_from_user((char *)attr_name, 540 ops[i].am_attrname, MAXNAMELEN); 541 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 542 error = -ERANGE; 543 if (ops[i].am_error < 0) 544 break; 545 546 switch (ops[i].am_opcode) { 547 case ATTR_OP_GET: 548 ops[i].am_error = xfs_attrmulti_attr_get( 549 d_inode(dentry), attr_name, 550 ops[i].am_attrvalue, &ops[i].am_length, 551 ops[i].am_flags); 552 break; 553 case ATTR_OP_SET: 554 ops[i].am_error = mnt_want_write_file(parfilp); 555 if (ops[i].am_error) 556 break; 557 ops[i].am_error = xfs_attrmulti_attr_set( 558 d_inode(dentry), attr_name, 559 ops[i].am_attrvalue, ops[i].am_length, 560 ops[i].am_flags); 561 mnt_drop_write_file(parfilp); 562 break; 563 case ATTR_OP_REMOVE: 564 ops[i].am_error = mnt_want_write_file(parfilp); 565 if (ops[i].am_error) 566 break; 567 ops[i].am_error = xfs_attrmulti_attr_remove( 568 d_inode(dentry), attr_name, 569 ops[i].am_flags); 570 mnt_drop_write_file(parfilp); 571 break; 572 default: 573 ops[i].am_error = -EINVAL; 574 } 575 } 576 577 if (copy_to_user(am_hreq.ops, ops, size)) 578 error = -EFAULT; 579 580 kfree(attr_name); 581 out_kfree_ops: 582 kfree(ops); 583 out_dput: 584 dput(dentry); 585 return error; 586 } 587 588 int 589 xfs_ioc_space( 590 struct file *filp, 591 unsigned int cmd, 592 xfs_flock64_t *bf) 593 { 594 struct inode *inode = file_inode(filp); 595 struct xfs_inode *ip = XFS_I(inode); 596 struct iattr iattr; 597 enum xfs_prealloc_flags flags = 0; 598 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL; 599 int error; 600 601 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 602 return -EPERM; 603 604 if (!(filp->f_mode & FMODE_WRITE)) 605 return -EBADF; 606 607 if (!S_ISREG(inode->i_mode)) 608 return -EINVAL; 609 610 if (filp->f_flags & O_DSYNC) 611 flags |= XFS_PREALLOC_SYNC; 612 if (filp->f_mode & FMODE_NOCMTIME) 613 flags |= XFS_PREALLOC_INVISIBLE; 614 615 error = mnt_want_write_file(filp); 616 if (error) 617 return error; 618 619 xfs_ilock(ip, iolock); 620 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP); 621 if (error) 622 goto out_unlock; 623 624 switch (bf->l_whence) { 625 case 0: /*SEEK_SET*/ 626 break; 627 case 1: /*SEEK_CUR*/ 628 bf->l_start += filp->f_pos; 629 break; 630 case 2: /*SEEK_END*/ 631 bf->l_start += XFS_ISIZE(ip); 632 break; 633 default: 634 error = -EINVAL; 635 goto out_unlock; 636 } 637 638 /* 639 * length of <= 0 for resv/unresv/zero is invalid. length for 640 * alloc/free is ignored completely and we have no idea what userspace 641 * might have set it to, so set it to zero to allow range 642 * checks to pass. 643 */ 644 switch (cmd) { 645 case XFS_IOC_ZERO_RANGE: 646 case XFS_IOC_RESVSP: 647 case XFS_IOC_RESVSP64: 648 case XFS_IOC_UNRESVSP: 649 case XFS_IOC_UNRESVSP64: 650 if (bf->l_len <= 0) { 651 error = -EINVAL; 652 goto out_unlock; 653 } 654 break; 655 default: 656 bf->l_len = 0; 657 break; 658 } 659 660 if (bf->l_start < 0 || 661 bf->l_start > inode->i_sb->s_maxbytes || 662 bf->l_start + bf->l_len < 0 || 663 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) { 664 error = -EINVAL; 665 goto out_unlock; 666 } 667 668 switch (cmd) { 669 case XFS_IOC_ZERO_RANGE: 670 flags |= XFS_PREALLOC_SET; 671 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); 672 break; 673 case XFS_IOC_RESVSP: 674 case XFS_IOC_RESVSP64: 675 flags |= XFS_PREALLOC_SET; 676 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, 677 XFS_BMAPI_PREALLOC); 678 break; 679 case XFS_IOC_UNRESVSP: 680 case XFS_IOC_UNRESVSP64: 681 error = xfs_free_file_space(ip, bf->l_start, bf->l_len); 682 break; 683 case XFS_IOC_ALLOCSP: 684 case XFS_IOC_ALLOCSP64: 685 case XFS_IOC_FREESP: 686 case XFS_IOC_FREESP64: 687 flags |= XFS_PREALLOC_CLEAR; 688 if (bf->l_start > XFS_ISIZE(ip)) { 689 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 690 bf->l_start - XFS_ISIZE(ip), 0); 691 if (error) 692 goto out_unlock; 693 } 694 695 iattr.ia_valid = ATTR_SIZE; 696 iattr.ia_size = bf->l_start; 697 698 error = xfs_vn_setattr_size(file_dentry(filp), &iattr); 699 break; 700 default: 701 ASSERT(0); 702 error = -EINVAL; 703 } 704 705 if (error) 706 goto out_unlock; 707 708 error = xfs_update_prealloc_flags(ip, flags); 709 710 out_unlock: 711 xfs_iunlock(ip, iolock); 712 mnt_drop_write_file(filp); 713 return error; 714 } 715 716 /* Return 0 on success or positive error */ 717 int 718 xfs_fsbulkstat_one_fmt( 719 struct xfs_ibulk *breq, 720 const struct xfs_bulkstat *bstat) 721 { 722 struct xfs_bstat bs1; 723 724 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat); 725 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1))) 726 return -EFAULT; 727 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat)); 728 } 729 730 int 731 xfs_fsinumbers_fmt( 732 struct xfs_ibulk *breq, 733 const struct xfs_inumbers *igrp) 734 { 735 struct xfs_inogrp ig1; 736 737 xfs_inumbers_to_inogrp(&ig1, igrp); 738 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp))) 739 return -EFAULT; 740 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp)); 741 } 742 743 STATIC int 744 xfs_ioc_fsbulkstat( 745 xfs_mount_t *mp, 746 unsigned int cmd, 747 void __user *arg) 748 { 749 struct xfs_fsop_bulkreq bulkreq; 750 struct xfs_ibulk breq = { 751 .mp = mp, 752 .ocount = 0, 753 }; 754 xfs_ino_t lastino; 755 int error; 756 757 /* done = 1 if there are more stats to get and if bulkstat */ 758 /* should be called again (unused here, but used in dmapi) */ 759 760 if (!capable(CAP_SYS_ADMIN)) 761 return -EPERM; 762 763 if (XFS_FORCED_SHUTDOWN(mp)) 764 return -EIO; 765 766 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq))) 767 return -EFAULT; 768 769 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64))) 770 return -EFAULT; 771 772 if (bulkreq.icount <= 0) 773 return -EINVAL; 774 775 if (bulkreq.ubuffer == NULL) 776 return -EINVAL; 777 778 breq.ubuffer = bulkreq.ubuffer; 779 breq.icount = bulkreq.icount; 780 781 /* 782 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number 783 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect 784 * that *lastip contains either zero or the number of the last inode to 785 * be examined by the previous call and return results starting with 786 * the next inode after that. The new bulk request back end functions 787 * take the inode to start with, so we have to compute the startino 788 * parameter from lastino to maintain correct function. lastino == 0 789 * is a special case because it has traditionally meant "first inode 790 * in filesystem". 791 */ 792 if (cmd == XFS_IOC_FSINUMBERS) { 793 breq.startino = lastino ? lastino + 1 : 0; 794 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt); 795 lastino = breq.startino - 1; 796 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) { 797 breq.startino = lastino; 798 breq.icount = 1; 799 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt); 800 } else { /* XFS_IOC_FSBULKSTAT */ 801 breq.startino = lastino ? lastino + 1 : 0; 802 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt); 803 lastino = breq.startino - 1; 804 } 805 806 if (error) 807 return error; 808 809 if (bulkreq.lastip != NULL && 810 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t))) 811 return -EFAULT; 812 813 if (bulkreq.ocount != NULL && 814 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32))) 815 return -EFAULT; 816 817 return 0; 818 } 819 820 /* Return 0 on success or positive error */ 821 static int 822 xfs_bulkstat_fmt( 823 struct xfs_ibulk *breq, 824 const struct xfs_bulkstat *bstat) 825 { 826 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat))) 827 return -EFAULT; 828 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat)); 829 } 830 831 /* 832 * Check the incoming bulk request @hdr from userspace and initialize the 833 * internal @breq bulk request appropriately. Returns 0 if the bulk request 834 * should proceed; -ECANCELED if there's nothing to do; or the usual 835 * negative error code. 836 */ 837 static int 838 xfs_bulk_ireq_setup( 839 struct xfs_mount *mp, 840 struct xfs_bulk_ireq *hdr, 841 struct xfs_ibulk *breq, 842 void __user *ubuffer) 843 { 844 if (hdr->icount == 0 || 845 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) || 846 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) 847 return -EINVAL; 848 849 breq->startino = hdr->ino; 850 breq->ubuffer = ubuffer; 851 breq->icount = hdr->icount; 852 breq->ocount = 0; 853 breq->flags = 0; 854 855 /* 856 * The @ino parameter is a special value, so we must look it up here. 857 * We're not allowed to have IREQ_AGNO, and we only return one inode 858 * worth of data. 859 */ 860 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) { 861 if (hdr->flags & XFS_BULK_IREQ_AGNO) 862 return -EINVAL; 863 864 switch (hdr->ino) { 865 case XFS_BULK_IREQ_SPECIAL_ROOT: 866 hdr->ino = mp->m_sb.sb_rootino; 867 break; 868 default: 869 return -EINVAL; 870 } 871 breq->icount = 1; 872 } 873 874 /* 875 * The IREQ_AGNO flag means that we only want results from a given AG. 876 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is 877 * beyond the specified AG then we return no results. 878 */ 879 if (hdr->flags & XFS_BULK_IREQ_AGNO) { 880 if (hdr->agno >= mp->m_sb.sb_agcount) 881 return -EINVAL; 882 883 if (breq->startino == 0) 884 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0); 885 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno) 886 return -EINVAL; 887 888 breq->flags |= XFS_IBULK_SAME_AG; 889 890 /* Asking for an inode past the end of the AG? We're done! */ 891 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno) 892 return -ECANCELED; 893 } else if (hdr->agno) 894 return -EINVAL; 895 896 /* Asking for an inode past the end of the FS? We're done! */ 897 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount) 898 return -ECANCELED; 899 900 return 0; 901 } 902 903 /* 904 * Update the userspace bulk request @hdr to reflect the end state of the 905 * internal bulk request @breq. 906 */ 907 static void 908 xfs_bulk_ireq_teardown( 909 struct xfs_bulk_ireq *hdr, 910 struct xfs_ibulk *breq) 911 { 912 hdr->ino = breq->startino; 913 hdr->ocount = breq->ocount; 914 } 915 916 /* Handle the v5 bulkstat ioctl. */ 917 STATIC int 918 xfs_ioc_bulkstat( 919 struct xfs_mount *mp, 920 unsigned int cmd, 921 struct xfs_bulkstat_req __user *arg) 922 { 923 struct xfs_bulk_ireq hdr; 924 struct xfs_ibulk breq = { 925 .mp = mp, 926 }; 927 int error; 928 929 if (!capable(CAP_SYS_ADMIN)) 930 return -EPERM; 931 932 if (XFS_FORCED_SHUTDOWN(mp)) 933 return -EIO; 934 935 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 936 return -EFAULT; 937 938 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat); 939 if (error == -ECANCELED) 940 goto out_teardown; 941 if (error < 0) 942 return error; 943 944 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt); 945 if (error) 946 return error; 947 948 out_teardown: 949 xfs_bulk_ireq_teardown(&hdr, &breq); 950 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 951 return -EFAULT; 952 953 return 0; 954 } 955 956 STATIC int 957 xfs_inumbers_fmt( 958 struct xfs_ibulk *breq, 959 const struct xfs_inumbers *igrp) 960 { 961 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers))) 962 return -EFAULT; 963 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers)); 964 } 965 966 /* Handle the v5 inumbers ioctl. */ 967 STATIC int 968 xfs_ioc_inumbers( 969 struct xfs_mount *mp, 970 unsigned int cmd, 971 struct xfs_inumbers_req __user *arg) 972 { 973 struct xfs_bulk_ireq hdr; 974 struct xfs_ibulk breq = { 975 .mp = mp, 976 }; 977 int error; 978 979 if (!capable(CAP_SYS_ADMIN)) 980 return -EPERM; 981 982 if (XFS_FORCED_SHUTDOWN(mp)) 983 return -EIO; 984 985 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) 986 return -EFAULT; 987 988 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers); 989 if (error == -ECANCELED) 990 goto out_teardown; 991 if (error < 0) 992 return error; 993 994 error = xfs_inumbers(&breq, xfs_inumbers_fmt); 995 if (error) 996 return error; 997 998 out_teardown: 999 xfs_bulk_ireq_teardown(&hdr, &breq); 1000 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) 1001 return -EFAULT; 1002 1003 return 0; 1004 } 1005 1006 STATIC int 1007 xfs_ioc_fsgeometry( 1008 struct xfs_mount *mp, 1009 void __user *arg, 1010 int struct_version) 1011 { 1012 struct xfs_fsop_geom fsgeo; 1013 size_t len; 1014 1015 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version); 1016 1017 if (struct_version <= 3) 1018 len = sizeof(struct xfs_fsop_geom_v1); 1019 else if (struct_version == 4) 1020 len = sizeof(struct xfs_fsop_geom_v4); 1021 else { 1022 xfs_fsop_geom_health(mp, &fsgeo); 1023 len = sizeof(fsgeo); 1024 } 1025 1026 if (copy_to_user(arg, &fsgeo, len)) 1027 return -EFAULT; 1028 return 0; 1029 } 1030 1031 STATIC int 1032 xfs_ioc_ag_geometry( 1033 struct xfs_mount *mp, 1034 void __user *arg) 1035 { 1036 struct xfs_ag_geometry ageo; 1037 int error; 1038 1039 if (copy_from_user(&ageo, arg, sizeof(ageo))) 1040 return -EFAULT; 1041 if (ageo.ag_flags) 1042 return -EINVAL; 1043 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved))) 1044 return -EINVAL; 1045 1046 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo); 1047 if (error) 1048 return error; 1049 1050 if (copy_to_user(arg, &ageo, sizeof(ageo))) 1051 return -EFAULT; 1052 return 0; 1053 } 1054 1055 /* 1056 * Linux extended inode flags interface. 1057 */ 1058 1059 STATIC unsigned int 1060 xfs_merge_ioc_xflags( 1061 unsigned int flags, 1062 unsigned int start) 1063 { 1064 unsigned int xflags = start; 1065 1066 if (flags & FS_IMMUTABLE_FL) 1067 xflags |= FS_XFLAG_IMMUTABLE; 1068 else 1069 xflags &= ~FS_XFLAG_IMMUTABLE; 1070 if (flags & FS_APPEND_FL) 1071 xflags |= FS_XFLAG_APPEND; 1072 else 1073 xflags &= ~FS_XFLAG_APPEND; 1074 if (flags & FS_SYNC_FL) 1075 xflags |= FS_XFLAG_SYNC; 1076 else 1077 xflags &= ~FS_XFLAG_SYNC; 1078 if (flags & FS_NOATIME_FL) 1079 xflags |= FS_XFLAG_NOATIME; 1080 else 1081 xflags &= ~FS_XFLAG_NOATIME; 1082 if (flags & FS_NODUMP_FL) 1083 xflags |= FS_XFLAG_NODUMP; 1084 else 1085 xflags &= ~FS_XFLAG_NODUMP; 1086 1087 return xflags; 1088 } 1089 1090 STATIC unsigned int 1091 xfs_di2lxflags( 1092 uint16_t di_flags) 1093 { 1094 unsigned int flags = 0; 1095 1096 if (di_flags & XFS_DIFLAG_IMMUTABLE) 1097 flags |= FS_IMMUTABLE_FL; 1098 if (di_flags & XFS_DIFLAG_APPEND) 1099 flags |= FS_APPEND_FL; 1100 if (di_flags & XFS_DIFLAG_SYNC) 1101 flags |= FS_SYNC_FL; 1102 if (di_flags & XFS_DIFLAG_NOATIME) 1103 flags |= FS_NOATIME_FL; 1104 if (di_flags & XFS_DIFLAG_NODUMP) 1105 flags |= FS_NODUMP_FL; 1106 return flags; 1107 } 1108 1109 static void 1110 xfs_fill_fsxattr( 1111 struct xfs_inode *ip, 1112 bool attr, 1113 struct fsxattr *fa) 1114 { 1115 simple_fill_fsxattr(fa, xfs_ip2xflags(ip)); 1116 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 1117 fa->fsx_cowextsize = ip->i_d.di_cowextsize << 1118 ip->i_mount->m_sb.sb_blocklog; 1119 fa->fsx_projid = xfs_get_projid(ip); 1120 1121 if (attr) { 1122 if (ip->i_afp) { 1123 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 1124 fa->fsx_nextents = xfs_iext_count(ip->i_afp); 1125 else 1126 fa->fsx_nextents = ip->i_d.di_anextents; 1127 } else 1128 fa->fsx_nextents = 0; 1129 } else { 1130 if (ip->i_df.if_flags & XFS_IFEXTENTS) 1131 fa->fsx_nextents = xfs_iext_count(&ip->i_df); 1132 else 1133 fa->fsx_nextents = ip->i_d.di_nextents; 1134 } 1135 } 1136 1137 STATIC int 1138 xfs_ioc_fsgetxattr( 1139 xfs_inode_t *ip, 1140 int attr, 1141 void __user *arg) 1142 { 1143 struct fsxattr fa; 1144 1145 xfs_ilock(ip, XFS_ILOCK_SHARED); 1146 xfs_fill_fsxattr(ip, attr, &fa); 1147 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1148 1149 if (copy_to_user(arg, &fa, sizeof(fa))) 1150 return -EFAULT; 1151 return 0; 1152 } 1153 1154 STATIC uint16_t 1155 xfs_flags2diflags( 1156 struct xfs_inode *ip, 1157 unsigned int xflags) 1158 { 1159 /* can't set PREALLOC this way, just preserve it */ 1160 uint16_t di_flags = 1161 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 1162 1163 if (xflags & FS_XFLAG_IMMUTABLE) 1164 di_flags |= XFS_DIFLAG_IMMUTABLE; 1165 if (xflags & FS_XFLAG_APPEND) 1166 di_flags |= XFS_DIFLAG_APPEND; 1167 if (xflags & FS_XFLAG_SYNC) 1168 di_flags |= XFS_DIFLAG_SYNC; 1169 if (xflags & FS_XFLAG_NOATIME) 1170 di_flags |= XFS_DIFLAG_NOATIME; 1171 if (xflags & FS_XFLAG_NODUMP) 1172 di_flags |= XFS_DIFLAG_NODUMP; 1173 if (xflags & FS_XFLAG_NODEFRAG) 1174 di_flags |= XFS_DIFLAG_NODEFRAG; 1175 if (xflags & FS_XFLAG_FILESTREAM) 1176 di_flags |= XFS_DIFLAG_FILESTREAM; 1177 if (S_ISDIR(VFS_I(ip)->i_mode)) { 1178 if (xflags & FS_XFLAG_RTINHERIT) 1179 di_flags |= XFS_DIFLAG_RTINHERIT; 1180 if (xflags & FS_XFLAG_NOSYMLINKS) 1181 di_flags |= XFS_DIFLAG_NOSYMLINKS; 1182 if (xflags & FS_XFLAG_EXTSZINHERIT) 1183 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 1184 if (xflags & FS_XFLAG_PROJINHERIT) 1185 di_flags |= XFS_DIFLAG_PROJINHERIT; 1186 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 1187 if (xflags & FS_XFLAG_REALTIME) 1188 di_flags |= XFS_DIFLAG_REALTIME; 1189 if (xflags & FS_XFLAG_EXTSIZE) 1190 di_flags |= XFS_DIFLAG_EXTSIZE; 1191 } 1192 1193 return di_flags; 1194 } 1195 1196 STATIC uint64_t 1197 xfs_flags2diflags2( 1198 struct xfs_inode *ip, 1199 unsigned int xflags) 1200 { 1201 uint64_t di_flags2 = 1202 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK); 1203 1204 if (xflags & FS_XFLAG_DAX) 1205 di_flags2 |= XFS_DIFLAG2_DAX; 1206 if (xflags & FS_XFLAG_COWEXTSIZE) 1207 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 1208 1209 return di_flags2; 1210 } 1211 1212 STATIC void 1213 xfs_diflags_to_linux( 1214 struct xfs_inode *ip) 1215 { 1216 struct inode *inode = VFS_I(ip); 1217 unsigned int xflags = xfs_ip2xflags(ip); 1218 1219 if (xflags & FS_XFLAG_IMMUTABLE) 1220 inode->i_flags |= S_IMMUTABLE; 1221 else 1222 inode->i_flags &= ~S_IMMUTABLE; 1223 if (xflags & FS_XFLAG_APPEND) 1224 inode->i_flags |= S_APPEND; 1225 else 1226 inode->i_flags &= ~S_APPEND; 1227 if (xflags & FS_XFLAG_SYNC) 1228 inode->i_flags |= S_SYNC; 1229 else 1230 inode->i_flags &= ~S_SYNC; 1231 if (xflags & FS_XFLAG_NOATIME) 1232 inode->i_flags |= S_NOATIME; 1233 else 1234 inode->i_flags &= ~S_NOATIME; 1235 #if 0 /* disabled until the flag switching races are sorted out */ 1236 if (xflags & FS_XFLAG_DAX) 1237 inode->i_flags |= S_DAX; 1238 else 1239 inode->i_flags &= ~S_DAX; 1240 #endif 1241 } 1242 1243 static int 1244 xfs_ioctl_setattr_xflags( 1245 struct xfs_trans *tp, 1246 struct xfs_inode *ip, 1247 struct fsxattr *fa) 1248 { 1249 struct xfs_mount *mp = ip->i_mount; 1250 uint64_t di_flags2; 1251 1252 /* Can't change realtime flag if any extents are allocated. */ 1253 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1254 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1255 return -EINVAL; 1256 1257 /* If realtime flag is set then must have realtime device */ 1258 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1259 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1260 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1261 return -EINVAL; 1262 } 1263 1264 /* Clear reflink if we are actually able to set the rt flag. */ 1265 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1266 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; 1267 1268 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1269 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1270 return -EINVAL; 1271 1272 /* diflags2 only valid for v3 inodes. */ 1273 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1274 if (di_flags2 && ip->i_d.di_version < 3) 1275 return -EINVAL; 1276 1277 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags); 1278 ip->i_d.di_flags2 = di_flags2; 1279 1280 xfs_diflags_to_linux(ip); 1281 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1282 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1283 XFS_STATS_INC(mp, xs_ig_attrchg); 1284 return 0; 1285 } 1286 1287 /* 1288 * If we are changing DAX flags, we have to ensure the file is clean and any 1289 * cached objects in the address space are invalidated and removed. This 1290 * requires us to lock out other IO and page faults similar to a truncate 1291 * operation. The locks need to be held until the transaction has been committed 1292 * so that the cache invalidation is atomic with respect to the DAX flag 1293 * manipulation. 1294 */ 1295 static int 1296 xfs_ioctl_setattr_dax_invalidate( 1297 struct xfs_inode *ip, 1298 struct fsxattr *fa, 1299 int *join_flags) 1300 { 1301 struct inode *inode = VFS_I(ip); 1302 struct super_block *sb = inode->i_sb; 1303 int error; 1304 1305 *join_flags = 0; 1306 1307 /* 1308 * It is only valid to set the DAX flag on regular files and 1309 * directories on filesystems where the block size is equal to the page 1310 * size. On directories it serves as an inherited hint so we don't 1311 * have to check the device for dax support or flush pagecache. 1312 */ 1313 if (fa->fsx_xflags & FS_XFLAG_DAX) { 1314 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) 1315 return -EINVAL; 1316 if (!bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)), 1317 sb->s_blocksize)) 1318 return -EINVAL; 1319 } 1320 1321 /* If the DAX state is not changing, we have nothing to do here. */ 1322 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode)) 1323 return 0; 1324 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode)) 1325 return 0; 1326 1327 if (S_ISDIR(inode->i_mode)) 1328 return 0; 1329 1330 /* lock, flush and invalidate mapping in preparation for flag change */ 1331 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1332 error = filemap_write_and_wait(inode->i_mapping); 1333 if (error) 1334 goto out_unlock; 1335 error = invalidate_inode_pages2(inode->i_mapping); 1336 if (error) 1337 goto out_unlock; 1338 1339 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL; 1340 return 0; 1341 1342 out_unlock: 1343 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1344 return error; 1345 1346 } 1347 1348 /* 1349 * Set up the transaction structure for the setattr operation, checking that we 1350 * have permission to do so. On success, return a clean transaction and the 1351 * inode locked exclusively ready for further operation specific checks. On 1352 * failure, return an error without modifying or locking the inode. 1353 * 1354 * The inode might already be IO locked on call. If this is the case, it is 1355 * indicated in @join_flags and we take full responsibility for ensuring they 1356 * are unlocked from now on. Hence if we have an error here, we still have to 1357 * unlock them. Otherwise, once they are joined to the transaction, they will 1358 * be unlocked on commit/cancel. 1359 */ 1360 static struct xfs_trans * 1361 xfs_ioctl_setattr_get_trans( 1362 struct xfs_inode *ip, 1363 int join_flags) 1364 { 1365 struct xfs_mount *mp = ip->i_mount; 1366 struct xfs_trans *tp; 1367 int error = -EROFS; 1368 1369 if (mp->m_flags & XFS_MOUNT_RDONLY) 1370 goto out_unlock; 1371 error = -EIO; 1372 if (XFS_FORCED_SHUTDOWN(mp)) 1373 goto out_unlock; 1374 1375 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1376 if (error) 1377 goto out_unlock; 1378 1379 xfs_ilock(ip, XFS_ILOCK_EXCL); 1380 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags); 1381 join_flags = 0; 1382 1383 /* 1384 * CAP_FOWNER overrides the following restrictions: 1385 * 1386 * The user ID of the calling process must be equal to the file owner 1387 * ID, except in cases where the CAP_FSETID capability is applicable. 1388 */ 1389 if (!inode_owner_or_capable(VFS_I(ip))) { 1390 error = -EPERM; 1391 goto out_cancel; 1392 } 1393 1394 if (mp->m_flags & XFS_MOUNT_WSYNC) 1395 xfs_trans_set_sync(tp); 1396 1397 return tp; 1398 1399 out_cancel: 1400 xfs_trans_cancel(tp); 1401 out_unlock: 1402 if (join_flags) 1403 xfs_iunlock(ip, join_flags); 1404 return ERR_PTR(error); 1405 } 1406 1407 /* 1408 * extent size hint validation is somewhat cumbersome. Rules are: 1409 * 1410 * 1. extent size hint is only valid for directories and regular files 1411 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1412 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1413 * 4. can only be changed on regular files if no extents are allocated 1414 * 5. can be changed on directories at any time 1415 * 6. extsize hint of 0 turns off hints, clears inode flags. 1416 * 7. Extent size must be a multiple of the appropriate block size. 1417 * 8. for non-realtime files, the extent size hint must be limited 1418 * to half the AG size to avoid alignment extending the extent beyond the 1419 * limits of the AG. 1420 * 1421 * Please keep this function in sync with xfs_scrub_inode_extsize. 1422 */ 1423 static int 1424 xfs_ioctl_setattr_check_extsize( 1425 struct xfs_inode *ip, 1426 struct fsxattr *fa) 1427 { 1428 struct xfs_mount *mp = ip->i_mount; 1429 xfs_extlen_t size; 1430 xfs_fsblock_t extsize_fsb; 1431 1432 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents && 1433 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1434 return -EINVAL; 1435 1436 if (fa->fsx_extsize == 0) 1437 return 0; 1438 1439 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1440 if (extsize_fsb > MAXEXTLEN) 1441 return -EINVAL; 1442 1443 if (XFS_IS_REALTIME_INODE(ip) || 1444 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1445 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1446 } else { 1447 size = mp->m_sb.sb_blocksize; 1448 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1449 return -EINVAL; 1450 } 1451 1452 if (fa->fsx_extsize % size) 1453 return -EINVAL; 1454 1455 return 0; 1456 } 1457 1458 /* 1459 * CoW extent size hint validation rules are: 1460 * 1461 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1462 * The inode does not have to have any shared blocks, but it must be a v3. 1463 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1464 * for a directory, the hint is propagated to new files. 1465 * 3. Can be changed on files & directories at any time. 1466 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1467 * 5. Extent size must be a multiple of the appropriate block size. 1468 * 6. The extent size hint must be limited to half the AG size to avoid 1469 * alignment extending the extent beyond the limits of the AG. 1470 * 1471 * Please keep this function in sync with xfs_scrub_inode_cowextsize. 1472 */ 1473 static int 1474 xfs_ioctl_setattr_check_cowextsize( 1475 struct xfs_inode *ip, 1476 struct fsxattr *fa) 1477 { 1478 struct xfs_mount *mp = ip->i_mount; 1479 xfs_extlen_t size; 1480 xfs_fsblock_t cowextsize_fsb; 1481 1482 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1483 return 0; 1484 1485 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) || 1486 ip->i_d.di_version != 3) 1487 return -EINVAL; 1488 1489 if (fa->fsx_cowextsize == 0) 1490 return 0; 1491 1492 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1493 if (cowextsize_fsb > MAXEXTLEN) 1494 return -EINVAL; 1495 1496 size = mp->m_sb.sb_blocksize; 1497 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1498 return -EINVAL; 1499 1500 if (fa->fsx_cowextsize % size) 1501 return -EINVAL; 1502 1503 return 0; 1504 } 1505 1506 static int 1507 xfs_ioctl_setattr_check_projid( 1508 struct xfs_inode *ip, 1509 struct fsxattr *fa) 1510 { 1511 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1512 if (fa->fsx_projid > (uint16_t)-1 && 1513 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1514 return -EINVAL; 1515 return 0; 1516 } 1517 1518 STATIC int 1519 xfs_ioctl_setattr( 1520 xfs_inode_t *ip, 1521 struct fsxattr *fa) 1522 { 1523 struct fsxattr old_fa; 1524 struct xfs_mount *mp = ip->i_mount; 1525 struct xfs_trans *tp; 1526 struct xfs_dquot *udqp = NULL; 1527 struct xfs_dquot *pdqp = NULL; 1528 struct xfs_dquot *olddquot = NULL; 1529 int code; 1530 int join_flags = 0; 1531 1532 trace_xfs_ioctl_setattr(ip); 1533 1534 code = xfs_ioctl_setattr_check_projid(ip, fa); 1535 if (code) 1536 return code; 1537 1538 /* 1539 * If disk quotas is on, we make sure that the dquots do exist on disk, 1540 * before we start any other transactions. Trying to do this later 1541 * is messy. We don't care to take a readlock to look at the ids 1542 * in inode here, because we can't hold it across the trans_reserve. 1543 * If the IDs do change before we take the ilock, we're covered 1544 * because the i_*dquot fields will get updated anyway. 1545 */ 1546 if (XFS_IS_QUOTA_ON(mp)) { 1547 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1548 ip->i_d.di_gid, fa->fsx_projid, 1549 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1550 if (code) 1551 return code; 1552 } 1553 1554 /* 1555 * Changing DAX config may require inode locking for mapping 1556 * invalidation. These need to be held all the way to transaction commit 1557 * or cancel time, so need to be passed through to 1558 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1559 * appropriately. 1560 */ 1561 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags); 1562 if (code) 1563 goto error_free_dquots; 1564 1565 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1566 if (IS_ERR(tp)) { 1567 code = PTR_ERR(tp); 1568 goto error_free_dquots; 1569 } 1570 1571 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1572 xfs_get_projid(ip) != fa->fsx_projid) { 1573 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1574 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1575 if (code) /* out of quota */ 1576 goto error_trans_cancel; 1577 } 1578 1579 xfs_fill_fsxattr(ip, false, &old_fa); 1580 code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa); 1581 if (code) 1582 goto error_trans_cancel; 1583 1584 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1585 if (code) 1586 goto error_trans_cancel; 1587 1588 code = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1589 if (code) 1590 goto error_trans_cancel; 1591 1592 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1593 if (code) 1594 goto error_trans_cancel; 1595 1596 /* 1597 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1598 * overrides the following restrictions: 1599 * 1600 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1601 * successful return from chown() 1602 */ 1603 1604 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1605 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1606 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1607 1608 /* Change the ownerships and register project quota modifications */ 1609 if (xfs_get_projid(ip) != fa->fsx_projid) { 1610 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1611 olddquot = xfs_qm_vop_chown(tp, ip, 1612 &ip->i_pdquot, pdqp); 1613 } 1614 ASSERT(ip->i_d.di_version > 1); 1615 xfs_set_projid(ip, fa->fsx_projid); 1616 } 1617 1618 /* 1619 * Only set the extent size hint if we've already determined that the 1620 * extent size hint should be set on the inode. If no extent size flags 1621 * are set on the inode then unconditionally clear the extent size hint. 1622 */ 1623 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1624 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1625 else 1626 ip->i_d.di_extsize = 0; 1627 if (ip->i_d.di_version == 3 && 1628 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) 1629 ip->i_d.di_cowextsize = fa->fsx_cowextsize >> 1630 mp->m_sb.sb_blocklog; 1631 else 1632 ip->i_d.di_cowextsize = 0; 1633 1634 code = xfs_trans_commit(tp); 1635 1636 /* 1637 * Release any dquot(s) the inode had kept before chown. 1638 */ 1639 xfs_qm_dqrele(olddquot); 1640 xfs_qm_dqrele(udqp); 1641 xfs_qm_dqrele(pdqp); 1642 1643 return code; 1644 1645 error_trans_cancel: 1646 xfs_trans_cancel(tp); 1647 error_free_dquots: 1648 xfs_qm_dqrele(udqp); 1649 xfs_qm_dqrele(pdqp); 1650 return code; 1651 } 1652 1653 STATIC int 1654 xfs_ioc_fssetxattr( 1655 xfs_inode_t *ip, 1656 struct file *filp, 1657 void __user *arg) 1658 { 1659 struct fsxattr fa; 1660 int error; 1661 1662 if (copy_from_user(&fa, arg, sizeof(fa))) 1663 return -EFAULT; 1664 1665 error = mnt_want_write_file(filp); 1666 if (error) 1667 return error; 1668 error = xfs_ioctl_setattr(ip, &fa); 1669 mnt_drop_write_file(filp); 1670 return error; 1671 } 1672 1673 STATIC int 1674 xfs_ioc_getxflags( 1675 xfs_inode_t *ip, 1676 void __user *arg) 1677 { 1678 unsigned int flags; 1679 1680 flags = xfs_di2lxflags(ip->i_d.di_flags); 1681 if (copy_to_user(arg, &flags, sizeof(flags))) 1682 return -EFAULT; 1683 return 0; 1684 } 1685 1686 STATIC int 1687 xfs_ioc_setxflags( 1688 struct xfs_inode *ip, 1689 struct file *filp, 1690 void __user *arg) 1691 { 1692 struct xfs_trans *tp; 1693 struct fsxattr fa; 1694 struct fsxattr old_fa; 1695 unsigned int flags; 1696 int join_flags = 0; 1697 int error; 1698 1699 if (copy_from_user(&flags, arg, sizeof(flags))) 1700 return -EFAULT; 1701 1702 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1703 FS_NOATIME_FL | FS_NODUMP_FL | \ 1704 FS_SYNC_FL)) 1705 return -EOPNOTSUPP; 1706 1707 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1708 1709 error = mnt_want_write_file(filp); 1710 if (error) 1711 return error; 1712 1713 /* 1714 * Changing DAX config may require inode locking for mapping 1715 * invalidation. These need to be held all the way to transaction commit 1716 * or cancel time, so need to be passed through to 1717 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1718 * appropriately. 1719 */ 1720 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags); 1721 if (error) 1722 goto out_drop_write; 1723 1724 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1725 if (IS_ERR(tp)) { 1726 error = PTR_ERR(tp); 1727 goto out_drop_write; 1728 } 1729 1730 xfs_fill_fsxattr(ip, false, &old_fa); 1731 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa); 1732 if (error) { 1733 xfs_trans_cancel(tp); 1734 goto out_drop_write; 1735 } 1736 1737 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1738 if (error) { 1739 xfs_trans_cancel(tp); 1740 goto out_drop_write; 1741 } 1742 1743 error = xfs_trans_commit(tp); 1744 out_drop_write: 1745 mnt_drop_write_file(filp); 1746 return error; 1747 } 1748 1749 static bool 1750 xfs_getbmap_format( 1751 struct kgetbmap *p, 1752 struct getbmapx __user *u, 1753 size_t recsize) 1754 { 1755 if (put_user(p->bmv_offset, &u->bmv_offset) || 1756 put_user(p->bmv_block, &u->bmv_block) || 1757 put_user(p->bmv_length, &u->bmv_length) || 1758 put_user(0, &u->bmv_count) || 1759 put_user(0, &u->bmv_entries)) 1760 return false; 1761 if (recsize < sizeof(struct getbmapx)) 1762 return true; 1763 if (put_user(0, &u->bmv_iflags) || 1764 put_user(p->bmv_oflags, &u->bmv_oflags) || 1765 put_user(0, &u->bmv_unused1) || 1766 put_user(0, &u->bmv_unused2)) 1767 return false; 1768 return true; 1769 } 1770 1771 STATIC int 1772 xfs_ioc_getbmap( 1773 struct file *file, 1774 unsigned int cmd, 1775 void __user *arg) 1776 { 1777 struct getbmapx bmx = { 0 }; 1778 struct kgetbmap *buf; 1779 size_t recsize; 1780 int error, i; 1781 1782 switch (cmd) { 1783 case XFS_IOC_GETBMAPA: 1784 bmx.bmv_iflags = BMV_IF_ATTRFORK; 1785 /*FALLTHRU*/ 1786 case XFS_IOC_GETBMAP: 1787 if (file->f_mode & FMODE_NOCMTIME) 1788 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1789 /* struct getbmap is a strict subset of struct getbmapx. */ 1790 recsize = sizeof(struct getbmap); 1791 break; 1792 case XFS_IOC_GETBMAPX: 1793 recsize = sizeof(struct getbmapx); 1794 break; 1795 default: 1796 return -EINVAL; 1797 } 1798 1799 if (copy_from_user(&bmx, arg, recsize)) 1800 return -EFAULT; 1801 1802 if (bmx.bmv_count < 2) 1803 return -EINVAL; 1804 if (bmx.bmv_count > ULONG_MAX / recsize) 1805 return -ENOMEM; 1806 1807 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0); 1808 if (!buf) 1809 return -ENOMEM; 1810 1811 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 1812 if (error) 1813 goto out_free_buf; 1814 1815 error = -EFAULT; 1816 if (copy_to_user(arg, &bmx, recsize)) 1817 goto out_free_buf; 1818 arg += recsize; 1819 1820 for (i = 0; i < bmx.bmv_entries; i++) { 1821 if (!xfs_getbmap_format(buf + i, arg, recsize)) 1822 goto out_free_buf; 1823 arg += recsize; 1824 } 1825 1826 error = 0; 1827 out_free_buf: 1828 kmem_free(buf); 1829 return error; 1830 } 1831 1832 struct getfsmap_info { 1833 struct xfs_mount *mp; 1834 struct fsmap_head __user *data; 1835 unsigned int idx; 1836 __u32 last_flags; 1837 }; 1838 1839 STATIC int 1840 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv) 1841 { 1842 struct getfsmap_info *info = priv; 1843 struct fsmap fm; 1844 1845 trace_xfs_getfsmap_mapping(info->mp, xfm); 1846 1847 info->last_flags = xfm->fmr_flags; 1848 xfs_fsmap_from_internal(&fm, xfm); 1849 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm, 1850 sizeof(struct fsmap))) 1851 return -EFAULT; 1852 1853 return 0; 1854 } 1855 1856 STATIC int 1857 xfs_ioc_getfsmap( 1858 struct xfs_inode *ip, 1859 struct fsmap_head __user *arg) 1860 { 1861 struct getfsmap_info info = { NULL }; 1862 struct xfs_fsmap_head xhead = {0}; 1863 struct fsmap_head head; 1864 bool aborted = false; 1865 int error; 1866 1867 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1868 return -EFAULT; 1869 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1870 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1871 sizeof(head.fmh_keys[0].fmr_reserved)) || 1872 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1873 sizeof(head.fmh_keys[1].fmr_reserved))) 1874 return -EINVAL; 1875 1876 xhead.fmh_iflags = head.fmh_iflags; 1877 xhead.fmh_count = head.fmh_count; 1878 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1879 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1880 1881 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1882 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1883 1884 info.mp = ip->i_mount; 1885 info.data = arg; 1886 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info); 1887 if (error == -ECANCELED) { 1888 error = 0; 1889 aborted = true; 1890 } else if (error) 1891 return error; 1892 1893 /* If we didn't abort, set the "last" flag in the last fmx */ 1894 if (!aborted && info.idx) { 1895 info.last_flags |= FMR_OF_LAST; 1896 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags, 1897 &info.last_flags, sizeof(info.last_flags))) 1898 return -EFAULT; 1899 } 1900 1901 /* copy back header */ 1902 head.fmh_entries = xhead.fmh_entries; 1903 head.fmh_oflags = xhead.fmh_oflags; 1904 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 1905 return -EFAULT; 1906 1907 return 0; 1908 } 1909 1910 STATIC int 1911 xfs_ioc_scrub_metadata( 1912 struct xfs_inode *ip, 1913 void __user *arg) 1914 { 1915 struct xfs_scrub_metadata scrub; 1916 int error; 1917 1918 if (!capable(CAP_SYS_ADMIN)) 1919 return -EPERM; 1920 1921 if (copy_from_user(&scrub, arg, sizeof(scrub))) 1922 return -EFAULT; 1923 1924 error = xfs_scrub_metadata(ip, &scrub); 1925 if (error) 1926 return error; 1927 1928 if (copy_to_user(arg, &scrub, sizeof(scrub))) 1929 return -EFAULT; 1930 1931 return 0; 1932 } 1933 1934 int 1935 xfs_ioc_swapext( 1936 xfs_swapext_t *sxp) 1937 { 1938 xfs_inode_t *ip, *tip; 1939 struct fd f, tmp; 1940 int error = 0; 1941 1942 /* Pull information for the target fd */ 1943 f = fdget((int)sxp->sx_fdtarget); 1944 if (!f.file) { 1945 error = -EINVAL; 1946 goto out; 1947 } 1948 1949 if (!(f.file->f_mode & FMODE_WRITE) || 1950 !(f.file->f_mode & FMODE_READ) || 1951 (f.file->f_flags & O_APPEND)) { 1952 error = -EBADF; 1953 goto out_put_file; 1954 } 1955 1956 tmp = fdget((int)sxp->sx_fdtmp); 1957 if (!tmp.file) { 1958 error = -EINVAL; 1959 goto out_put_file; 1960 } 1961 1962 if (!(tmp.file->f_mode & FMODE_WRITE) || 1963 !(tmp.file->f_mode & FMODE_READ) || 1964 (tmp.file->f_flags & O_APPEND)) { 1965 error = -EBADF; 1966 goto out_put_tmp_file; 1967 } 1968 1969 if (IS_SWAPFILE(file_inode(f.file)) || 1970 IS_SWAPFILE(file_inode(tmp.file))) { 1971 error = -EINVAL; 1972 goto out_put_tmp_file; 1973 } 1974 1975 /* 1976 * We need to ensure that the fds passed in point to XFS inodes 1977 * before we cast and access them as XFS structures as we have no 1978 * control over what the user passes us here. 1979 */ 1980 if (f.file->f_op != &xfs_file_operations || 1981 tmp.file->f_op != &xfs_file_operations) { 1982 error = -EINVAL; 1983 goto out_put_tmp_file; 1984 } 1985 1986 ip = XFS_I(file_inode(f.file)); 1987 tip = XFS_I(file_inode(tmp.file)); 1988 1989 if (ip->i_mount != tip->i_mount) { 1990 error = -EINVAL; 1991 goto out_put_tmp_file; 1992 } 1993 1994 if (ip->i_ino == tip->i_ino) { 1995 error = -EINVAL; 1996 goto out_put_tmp_file; 1997 } 1998 1999 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 2000 error = -EIO; 2001 goto out_put_tmp_file; 2002 } 2003 2004 error = xfs_swap_extents(ip, tip, sxp); 2005 2006 out_put_tmp_file: 2007 fdput(tmp); 2008 out_put_file: 2009 fdput(f); 2010 out: 2011 return error; 2012 } 2013 2014 static int 2015 xfs_ioc_getlabel( 2016 struct xfs_mount *mp, 2017 char __user *user_label) 2018 { 2019 struct xfs_sb *sbp = &mp->m_sb; 2020 char label[XFSLABEL_MAX + 1]; 2021 2022 /* Paranoia */ 2023 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 2024 2025 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 2026 memset(label, 0, sizeof(label)); 2027 spin_lock(&mp->m_sb_lock); 2028 strncpy(label, sbp->sb_fname, XFSLABEL_MAX); 2029 spin_unlock(&mp->m_sb_lock); 2030 2031 if (copy_to_user(user_label, label, sizeof(label))) 2032 return -EFAULT; 2033 return 0; 2034 } 2035 2036 static int 2037 xfs_ioc_setlabel( 2038 struct file *filp, 2039 struct xfs_mount *mp, 2040 char __user *newlabel) 2041 { 2042 struct xfs_sb *sbp = &mp->m_sb; 2043 char label[XFSLABEL_MAX + 1]; 2044 size_t len; 2045 int error; 2046 2047 if (!capable(CAP_SYS_ADMIN)) 2048 return -EPERM; 2049 /* 2050 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 2051 * smaller, at 12 bytes. We copy one more to be sure we find the 2052 * (required) NULL character to test the incoming label length. 2053 * NB: The on disk label doesn't need to be null terminated. 2054 */ 2055 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 2056 return -EFAULT; 2057 len = strnlen(label, XFSLABEL_MAX + 1); 2058 if (len > sizeof(sbp->sb_fname)) 2059 return -EINVAL; 2060 2061 error = mnt_want_write_file(filp); 2062 if (error) 2063 return error; 2064 2065 spin_lock(&mp->m_sb_lock); 2066 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 2067 memcpy(sbp->sb_fname, label, len); 2068 spin_unlock(&mp->m_sb_lock); 2069 2070 /* 2071 * Now we do several things to satisfy userspace. 2072 * In addition to normal logging of the primary superblock, we also 2073 * immediately write these changes to sector zero for the primary, then 2074 * update all backup supers (as xfs_db does for a label change), then 2075 * invalidate the block device page cache. This is so that any prior 2076 * buffered reads from userspace (i.e. from blkid) are invalidated, 2077 * and userspace will see the newly-written label. 2078 */ 2079 error = xfs_sync_sb_buf(mp); 2080 if (error) 2081 goto out; 2082 /* 2083 * growfs also updates backup supers so lock against that. 2084 */ 2085 mutex_lock(&mp->m_growlock); 2086 error = xfs_update_secondary_sbs(mp); 2087 mutex_unlock(&mp->m_growlock); 2088 2089 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 2090 2091 out: 2092 mnt_drop_write_file(filp); 2093 return error; 2094 } 2095 2096 /* 2097 * Note: some of the ioctl's return positive numbers as a 2098 * byte count indicating success, such as readlink_by_handle. 2099 * So we don't "sign flip" like most other routines. This means 2100 * true errors need to be returned as a negative value. 2101 */ 2102 long 2103 xfs_file_ioctl( 2104 struct file *filp, 2105 unsigned int cmd, 2106 unsigned long p) 2107 { 2108 struct inode *inode = file_inode(filp); 2109 struct xfs_inode *ip = XFS_I(inode); 2110 struct xfs_mount *mp = ip->i_mount; 2111 void __user *arg = (void __user *)p; 2112 int error; 2113 2114 trace_xfs_file_ioctl(ip); 2115 2116 switch (cmd) { 2117 case FITRIM: 2118 return xfs_ioc_trim(mp, arg); 2119 case FS_IOC_GETFSLABEL: 2120 return xfs_ioc_getlabel(mp, arg); 2121 case FS_IOC_SETFSLABEL: 2122 return xfs_ioc_setlabel(filp, mp, arg); 2123 case XFS_IOC_ALLOCSP: 2124 case XFS_IOC_FREESP: 2125 case XFS_IOC_RESVSP: 2126 case XFS_IOC_UNRESVSP: 2127 case XFS_IOC_ALLOCSP64: 2128 case XFS_IOC_FREESP64: 2129 case XFS_IOC_RESVSP64: 2130 case XFS_IOC_UNRESVSP64: 2131 case XFS_IOC_ZERO_RANGE: { 2132 xfs_flock64_t bf; 2133 2134 if (copy_from_user(&bf, arg, sizeof(bf))) 2135 return -EFAULT; 2136 return xfs_ioc_space(filp, cmd, &bf); 2137 } 2138 case XFS_IOC_DIOINFO: { 2139 struct dioattr da; 2140 xfs_buftarg_t *target = 2141 XFS_IS_REALTIME_INODE(ip) ? 2142 mp->m_rtdev_targp : mp->m_ddev_targp; 2143 2144 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 2145 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 2146 2147 if (copy_to_user(arg, &da, sizeof(da))) 2148 return -EFAULT; 2149 return 0; 2150 } 2151 2152 case XFS_IOC_FSBULKSTAT_SINGLE: 2153 case XFS_IOC_FSBULKSTAT: 2154 case XFS_IOC_FSINUMBERS: 2155 return xfs_ioc_fsbulkstat(mp, cmd, arg); 2156 2157 case XFS_IOC_BULKSTAT: 2158 return xfs_ioc_bulkstat(mp, cmd, arg); 2159 case XFS_IOC_INUMBERS: 2160 return xfs_ioc_inumbers(mp, cmd, arg); 2161 2162 case XFS_IOC_FSGEOMETRY_V1: 2163 return xfs_ioc_fsgeometry(mp, arg, 3); 2164 case XFS_IOC_FSGEOMETRY_V4: 2165 return xfs_ioc_fsgeometry(mp, arg, 4); 2166 case XFS_IOC_FSGEOMETRY: 2167 return xfs_ioc_fsgeometry(mp, arg, 5); 2168 2169 case XFS_IOC_AG_GEOMETRY: 2170 return xfs_ioc_ag_geometry(mp, arg); 2171 2172 case XFS_IOC_GETVERSION: 2173 return put_user(inode->i_generation, (int __user *)arg); 2174 2175 case XFS_IOC_FSGETXATTR: 2176 return xfs_ioc_fsgetxattr(ip, 0, arg); 2177 case XFS_IOC_FSGETXATTRA: 2178 return xfs_ioc_fsgetxattr(ip, 1, arg); 2179 case XFS_IOC_FSSETXATTR: 2180 return xfs_ioc_fssetxattr(ip, filp, arg); 2181 case XFS_IOC_GETXFLAGS: 2182 return xfs_ioc_getxflags(ip, arg); 2183 case XFS_IOC_SETXFLAGS: 2184 return xfs_ioc_setxflags(ip, filp, arg); 2185 2186 case XFS_IOC_FSSETDM: { 2187 struct fsdmidata dmi; 2188 2189 if (copy_from_user(&dmi, arg, sizeof(dmi))) 2190 return -EFAULT; 2191 2192 error = mnt_want_write_file(filp); 2193 if (error) 2194 return error; 2195 2196 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 2197 dmi.fsd_dmstate); 2198 mnt_drop_write_file(filp); 2199 return error; 2200 } 2201 2202 case XFS_IOC_GETBMAP: 2203 case XFS_IOC_GETBMAPA: 2204 case XFS_IOC_GETBMAPX: 2205 return xfs_ioc_getbmap(filp, cmd, arg); 2206 2207 case FS_IOC_GETFSMAP: 2208 return xfs_ioc_getfsmap(ip, arg); 2209 2210 case XFS_IOC_SCRUB_METADATA: 2211 return xfs_ioc_scrub_metadata(ip, arg); 2212 2213 case XFS_IOC_FD_TO_HANDLE: 2214 case XFS_IOC_PATH_TO_HANDLE: 2215 case XFS_IOC_PATH_TO_FSHANDLE: { 2216 xfs_fsop_handlereq_t hreq; 2217 2218 if (copy_from_user(&hreq, arg, sizeof(hreq))) 2219 return -EFAULT; 2220 return xfs_find_handle(cmd, &hreq); 2221 } 2222 case XFS_IOC_OPEN_BY_HANDLE: { 2223 xfs_fsop_handlereq_t hreq; 2224 2225 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2226 return -EFAULT; 2227 return xfs_open_by_handle(filp, &hreq); 2228 } 2229 case XFS_IOC_FSSETDM_BY_HANDLE: 2230 return xfs_fssetdm_by_handle(filp, arg); 2231 2232 case XFS_IOC_READLINK_BY_HANDLE: { 2233 xfs_fsop_handlereq_t hreq; 2234 2235 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2236 return -EFAULT; 2237 return xfs_readlink_by_handle(filp, &hreq); 2238 } 2239 case XFS_IOC_ATTRLIST_BY_HANDLE: 2240 return xfs_attrlist_by_handle(filp, arg); 2241 2242 case XFS_IOC_ATTRMULTI_BY_HANDLE: 2243 return xfs_attrmulti_by_handle(filp, arg); 2244 2245 case XFS_IOC_SWAPEXT: { 2246 struct xfs_swapext sxp; 2247 2248 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 2249 return -EFAULT; 2250 error = mnt_want_write_file(filp); 2251 if (error) 2252 return error; 2253 error = xfs_ioc_swapext(&sxp); 2254 mnt_drop_write_file(filp); 2255 return error; 2256 } 2257 2258 case XFS_IOC_FSCOUNTS: { 2259 xfs_fsop_counts_t out; 2260 2261 xfs_fs_counts(mp, &out); 2262 2263 if (copy_to_user(arg, &out, sizeof(out))) 2264 return -EFAULT; 2265 return 0; 2266 } 2267 2268 case XFS_IOC_SET_RESBLKS: { 2269 xfs_fsop_resblks_t inout; 2270 uint64_t in; 2271 2272 if (!capable(CAP_SYS_ADMIN)) 2273 return -EPERM; 2274 2275 if (mp->m_flags & XFS_MOUNT_RDONLY) 2276 return -EROFS; 2277 2278 if (copy_from_user(&inout, arg, sizeof(inout))) 2279 return -EFAULT; 2280 2281 error = mnt_want_write_file(filp); 2282 if (error) 2283 return error; 2284 2285 /* input parameter is passed in resblks field of structure */ 2286 in = inout.resblks; 2287 error = xfs_reserve_blocks(mp, &in, &inout); 2288 mnt_drop_write_file(filp); 2289 if (error) 2290 return error; 2291 2292 if (copy_to_user(arg, &inout, sizeof(inout))) 2293 return -EFAULT; 2294 return 0; 2295 } 2296 2297 case XFS_IOC_GET_RESBLKS: { 2298 xfs_fsop_resblks_t out; 2299 2300 if (!capable(CAP_SYS_ADMIN)) 2301 return -EPERM; 2302 2303 error = xfs_reserve_blocks(mp, NULL, &out); 2304 if (error) 2305 return error; 2306 2307 if (copy_to_user(arg, &out, sizeof(out))) 2308 return -EFAULT; 2309 2310 return 0; 2311 } 2312 2313 case XFS_IOC_FSGROWFSDATA: { 2314 xfs_growfs_data_t in; 2315 2316 if (copy_from_user(&in, arg, sizeof(in))) 2317 return -EFAULT; 2318 2319 error = mnt_want_write_file(filp); 2320 if (error) 2321 return error; 2322 error = xfs_growfs_data(mp, &in); 2323 mnt_drop_write_file(filp); 2324 return error; 2325 } 2326 2327 case XFS_IOC_FSGROWFSLOG: { 2328 xfs_growfs_log_t in; 2329 2330 if (copy_from_user(&in, arg, sizeof(in))) 2331 return -EFAULT; 2332 2333 error = mnt_want_write_file(filp); 2334 if (error) 2335 return error; 2336 error = xfs_growfs_log(mp, &in); 2337 mnt_drop_write_file(filp); 2338 return error; 2339 } 2340 2341 case XFS_IOC_FSGROWFSRT: { 2342 xfs_growfs_rt_t in; 2343 2344 if (copy_from_user(&in, arg, sizeof(in))) 2345 return -EFAULT; 2346 2347 error = mnt_want_write_file(filp); 2348 if (error) 2349 return error; 2350 error = xfs_growfs_rt(mp, &in); 2351 mnt_drop_write_file(filp); 2352 return error; 2353 } 2354 2355 case XFS_IOC_GOINGDOWN: { 2356 uint32_t in; 2357 2358 if (!capable(CAP_SYS_ADMIN)) 2359 return -EPERM; 2360 2361 if (get_user(in, (uint32_t __user *)arg)) 2362 return -EFAULT; 2363 2364 return xfs_fs_goingdown(mp, in); 2365 } 2366 2367 case XFS_IOC_ERROR_INJECTION: { 2368 xfs_error_injection_t in; 2369 2370 if (!capable(CAP_SYS_ADMIN)) 2371 return -EPERM; 2372 2373 if (copy_from_user(&in, arg, sizeof(in))) 2374 return -EFAULT; 2375 2376 return xfs_errortag_add(mp, in.errtag); 2377 } 2378 2379 case XFS_IOC_ERROR_CLEARALL: 2380 if (!capable(CAP_SYS_ADMIN)) 2381 return -EPERM; 2382 2383 return xfs_errortag_clearall(mp); 2384 2385 case XFS_IOC_FREE_EOFBLOCKS: { 2386 struct xfs_fs_eofblocks eofb; 2387 struct xfs_eofblocks keofb; 2388 2389 if (!capable(CAP_SYS_ADMIN)) 2390 return -EPERM; 2391 2392 if (mp->m_flags & XFS_MOUNT_RDONLY) 2393 return -EROFS; 2394 2395 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2396 return -EFAULT; 2397 2398 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 2399 if (error) 2400 return error; 2401 2402 return xfs_icache_free_eofblocks(mp, &keofb); 2403 } 2404 2405 default: 2406 return -ENOTTY; 2407 } 2408 } 2409