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_lpath((const char __user *)hreq->path, &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, KM_SLEEP); 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, KM_SLEEP); 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; XFS_ITER_ABORT 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 XFS_ITER_ABORT; 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 XFS_ITER_ABORT; 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 == XFS_ITER_ABORT) 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 == XFS_ITER_ABORT) 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 1042 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo); 1043 if (error) 1044 return error; 1045 1046 if (copy_to_user(arg, &ageo, sizeof(ageo))) 1047 return -EFAULT; 1048 return 0; 1049 } 1050 1051 /* 1052 * Linux extended inode flags interface. 1053 */ 1054 1055 STATIC unsigned int 1056 xfs_merge_ioc_xflags( 1057 unsigned int flags, 1058 unsigned int start) 1059 { 1060 unsigned int xflags = start; 1061 1062 if (flags & FS_IMMUTABLE_FL) 1063 xflags |= FS_XFLAG_IMMUTABLE; 1064 else 1065 xflags &= ~FS_XFLAG_IMMUTABLE; 1066 if (flags & FS_APPEND_FL) 1067 xflags |= FS_XFLAG_APPEND; 1068 else 1069 xflags &= ~FS_XFLAG_APPEND; 1070 if (flags & FS_SYNC_FL) 1071 xflags |= FS_XFLAG_SYNC; 1072 else 1073 xflags &= ~FS_XFLAG_SYNC; 1074 if (flags & FS_NOATIME_FL) 1075 xflags |= FS_XFLAG_NOATIME; 1076 else 1077 xflags &= ~FS_XFLAG_NOATIME; 1078 if (flags & FS_NODUMP_FL) 1079 xflags |= FS_XFLAG_NODUMP; 1080 else 1081 xflags &= ~FS_XFLAG_NODUMP; 1082 1083 return xflags; 1084 } 1085 1086 STATIC unsigned int 1087 xfs_di2lxflags( 1088 uint16_t di_flags) 1089 { 1090 unsigned int flags = 0; 1091 1092 if (di_flags & XFS_DIFLAG_IMMUTABLE) 1093 flags |= FS_IMMUTABLE_FL; 1094 if (di_flags & XFS_DIFLAG_APPEND) 1095 flags |= FS_APPEND_FL; 1096 if (di_flags & XFS_DIFLAG_SYNC) 1097 flags |= FS_SYNC_FL; 1098 if (di_flags & XFS_DIFLAG_NOATIME) 1099 flags |= FS_NOATIME_FL; 1100 if (di_flags & XFS_DIFLAG_NODUMP) 1101 flags |= FS_NODUMP_FL; 1102 return flags; 1103 } 1104 1105 static void 1106 xfs_fill_fsxattr( 1107 struct xfs_inode *ip, 1108 bool attr, 1109 struct fsxattr *fa) 1110 { 1111 simple_fill_fsxattr(fa, xfs_ip2xflags(ip)); 1112 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 1113 fa->fsx_cowextsize = ip->i_d.di_cowextsize << 1114 ip->i_mount->m_sb.sb_blocklog; 1115 fa->fsx_projid = xfs_get_projid(ip); 1116 1117 if (attr) { 1118 if (ip->i_afp) { 1119 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 1120 fa->fsx_nextents = xfs_iext_count(ip->i_afp); 1121 else 1122 fa->fsx_nextents = ip->i_d.di_anextents; 1123 } else 1124 fa->fsx_nextents = 0; 1125 } else { 1126 if (ip->i_df.if_flags & XFS_IFEXTENTS) 1127 fa->fsx_nextents = xfs_iext_count(&ip->i_df); 1128 else 1129 fa->fsx_nextents = ip->i_d.di_nextents; 1130 } 1131 } 1132 1133 STATIC int 1134 xfs_ioc_fsgetxattr( 1135 xfs_inode_t *ip, 1136 int attr, 1137 void __user *arg) 1138 { 1139 struct fsxattr fa; 1140 1141 xfs_ilock(ip, XFS_ILOCK_SHARED); 1142 xfs_fill_fsxattr(ip, attr, &fa); 1143 xfs_iunlock(ip, XFS_ILOCK_SHARED); 1144 1145 if (copy_to_user(arg, &fa, sizeof(fa))) 1146 return -EFAULT; 1147 return 0; 1148 } 1149 1150 STATIC uint16_t 1151 xfs_flags2diflags( 1152 struct xfs_inode *ip, 1153 unsigned int xflags) 1154 { 1155 /* can't set PREALLOC this way, just preserve it */ 1156 uint16_t di_flags = 1157 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 1158 1159 if (xflags & FS_XFLAG_IMMUTABLE) 1160 di_flags |= XFS_DIFLAG_IMMUTABLE; 1161 if (xflags & FS_XFLAG_APPEND) 1162 di_flags |= XFS_DIFLAG_APPEND; 1163 if (xflags & FS_XFLAG_SYNC) 1164 di_flags |= XFS_DIFLAG_SYNC; 1165 if (xflags & FS_XFLAG_NOATIME) 1166 di_flags |= XFS_DIFLAG_NOATIME; 1167 if (xflags & FS_XFLAG_NODUMP) 1168 di_flags |= XFS_DIFLAG_NODUMP; 1169 if (xflags & FS_XFLAG_NODEFRAG) 1170 di_flags |= XFS_DIFLAG_NODEFRAG; 1171 if (xflags & FS_XFLAG_FILESTREAM) 1172 di_flags |= XFS_DIFLAG_FILESTREAM; 1173 if (S_ISDIR(VFS_I(ip)->i_mode)) { 1174 if (xflags & FS_XFLAG_RTINHERIT) 1175 di_flags |= XFS_DIFLAG_RTINHERIT; 1176 if (xflags & FS_XFLAG_NOSYMLINKS) 1177 di_flags |= XFS_DIFLAG_NOSYMLINKS; 1178 if (xflags & FS_XFLAG_EXTSZINHERIT) 1179 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 1180 if (xflags & FS_XFLAG_PROJINHERIT) 1181 di_flags |= XFS_DIFLAG_PROJINHERIT; 1182 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 1183 if (xflags & FS_XFLAG_REALTIME) 1184 di_flags |= XFS_DIFLAG_REALTIME; 1185 if (xflags & FS_XFLAG_EXTSIZE) 1186 di_flags |= XFS_DIFLAG_EXTSIZE; 1187 } 1188 1189 return di_flags; 1190 } 1191 1192 STATIC uint64_t 1193 xfs_flags2diflags2( 1194 struct xfs_inode *ip, 1195 unsigned int xflags) 1196 { 1197 uint64_t di_flags2 = 1198 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK); 1199 1200 if (xflags & FS_XFLAG_DAX) 1201 di_flags2 |= XFS_DIFLAG2_DAX; 1202 if (xflags & FS_XFLAG_COWEXTSIZE) 1203 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 1204 1205 return di_flags2; 1206 } 1207 1208 STATIC void 1209 xfs_diflags_to_linux( 1210 struct xfs_inode *ip) 1211 { 1212 struct inode *inode = VFS_I(ip); 1213 unsigned int xflags = xfs_ip2xflags(ip); 1214 1215 if (xflags & FS_XFLAG_IMMUTABLE) 1216 inode->i_flags |= S_IMMUTABLE; 1217 else 1218 inode->i_flags &= ~S_IMMUTABLE; 1219 if (xflags & FS_XFLAG_APPEND) 1220 inode->i_flags |= S_APPEND; 1221 else 1222 inode->i_flags &= ~S_APPEND; 1223 if (xflags & FS_XFLAG_SYNC) 1224 inode->i_flags |= S_SYNC; 1225 else 1226 inode->i_flags &= ~S_SYNC; 1227 if (xflags & FS_XFLAG_NOATIME) 1228 inode->i_flags |= S_NOATIME; 1229 else 1230 inode->i_flags &= ~S_NOATIME; 1231 #if 0 /* disabled until the flag switching races are sorted out */ 1232 if (xflags & FS_XFLAG_DAX) 1233 inode->i_flags |= S_DAX; 1234 else 1235 inode->i_flags &= ~S_DAX; 1236 #endif 1237 } 1238 1239 static int 1240 xfs_ioctl_setattr_xflags( 1241 struct xfs_trans *tp, 1242 struct xfs_inode *ip, 1243 struct fsxattr *fa) 1244 { 1245 struct xfs_mount *mp = ip->i_mount; 1246 uint64_t di_flags2; 1247 1248 /* Can't change realtime flag if any extents are allocated. */ 1249 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1250 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1251 return -EINVAL; 1252 1253 /* If realtime flag is set then must have realtime device */ 1254 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1255 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1256 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1257 return -EINVAL; 1258 } 1259 1260 /* Clear reflink if we are actually able to set the rt flag. */ 1261 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1262 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; 1263 1264 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1265 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1266 return -EINVAL; 1267 1268 /* diflags2 only valid for v3 inodes. */ 1269 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags); 1270 if (di_flags2 && ip->i_d.di_version < 3) 1271 return -EINVAL; 1272 1273 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags); 1274 ip->i_d.di_flags2 = di_flags2; 1275 1276 xfs_diflags_to_linux(ip); 1277 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1278 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1279 XFS_STATS_INC(mp, xs_ig_attrchg); 1280 return 0; 1281 } 1282 1283 /* 1284 * If we are changing DAX flags, we have to ensure the file is clean and any 1285 * cached objects in the address space are invalidated and removed. This 1286 * requires us to lock out other IO and page faults similar to a truncate 1287 * operation. The locks need to be held until the transaction has been committed 1288 * so that the cache invalidation is atomic with respect to the DAX flag 1289 * manipulation. 1290 */ 1291 static int 1292 xfs_ioctl_setattr_dax_invalidate( 1293 struct xfs_inode *ip, 1294 struct fsxattr *fa, 1295 int *join_flags) 1296 { 1297 struct inode *inode = VFS_I(ip); 1298 struct super_block *sb = inode->i_sb; 1299 int error; 1300 1301 *join_flags = 0; 1302 1303 /* 1304 * It is only valid to set the DAX flag on regular files and 1305 * directories on filesystems where the block size is equal to the page 1306 * size. On directories it serves as an inherited hint so we don't 1307 * have to check the device for dax support or flush pagecache. 1308 */ 1309 if (fa->fsx_xflags & FS_XFLAG_DAX) { 1310 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) 1311 return -EINVAL; 1312 if (S_ISREG(inode->i_mode) && 1313 !bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)), 1314 sb->s_blocksize)) 1315 return -EINVAL; 1316 } 1317 1318 /* If the DAX state is not changing, we have nothing to do here. */ 1319 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode)) 1320 return 0; 1321 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode)) 1322 return 0; 1323 1324 if (S_ISDIR(inode->i_mode)) 1325 return 0; 1326 1327 /* lock, flush and invalidate mapping in preparation for flag change */ 1328 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1329 error = filemap_write_and_wait(inode->i_mapping); 1330 if (error) 1331 goto out_unlock; 1332 error = invalidate_inode_pages2(inode->i_mapping); 1333 if (error) 1334 goto out_unlock; 1335 1336 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL; 1337 return 0; 1338 1339 out_unlock: 1340 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1341 return error; 1342 1343 } 1344 1345 /* 1346 * Set up the transaction structure for the setattr operation, checking that we 1347 * have permission to do so. On success, return a clean transaction and the 1348 * inode locked exclusively ready for further operation specific checks. On 1349 * failure, return an error without modifying or locking the inode. 1350 * 1351 * The inode might already be IO locked on call. If this is the case, it is 1352 * indicated in @join_flags and we take full responsibility for ensuring they 1353 * are unlocked from now on. Hence if we have an error here, we still have to 1354 * unlock them. Otherwise, once they are joined to the transaction, they will 1355 * be unlocked on commit/cancel. 1356 */ 1357 static struct xfs_trans * 1358 xfs_ioctl_setattr_get_trans( 1359 struct xfs_inode *ip, 1360 int join_flags) 1361 { 1362 struct xfs_mount *mp = ip->i_mount; 1363 struct xfs_trans *tp; 1364 int error = -EROFS; 1365 1366 if (mp->m_flags & XFS_MOUNT_RDONLY) 1367 goto out_unlock; 1368 error = -EIO; 1369 if (XFS_FORCED_SHUTDOWN(mp)) 1370 goto out_unlock; 1371 1372 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1373 if (error) 1374 goto out_unlock; 1375 1376 xfs_ilock(ip, XFS_ILOCK_EXCL); 1377 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags); 1378 join_flags = 0; 1379 1380 /* 1381 * CAP_FOWNER overrides the following restrictions: 1382 * 1383 * The user ID of the calling process must be equal to the file owner 1384 * ID, except in cases where the CAP_FSETID capability is applicable. 1385 */ 1386 if (!inode_owner_or_capable(VFS_I(ip))) { 1387 error = -EPERM; 1388 goto out_cancel; 1389 } 1390 1391 if (mp->m_flags & XFS_MOUNT_WSYNC) 1392 xfs_trans_set_sync(tp); 1393 1394 return tp; 1395 1396 out_cancel: 1397 xfs_trans_cancel(tp); 1398 out_unlock: 1399 if (join_flags) 1400 xfs_iunlock(ip, join_flags); 1401 return ERR_PTR(error); 1402 } 1403 1404 /* 1405 * extent size hint validation is somewhat cumbersome. Rules are: 1406 * 1407 * 1. extent size hint is only valid for directories and regular files 1408 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1409 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1410 * 4. can only be changed on regular files if no extents are allocated 1411 * 5. can be changed on directories at any time 1412 * 6. extsize hint of 0 turns off hints, clears inode flags. 1413 * 7. Extent size must be a multiple of the appropriate block size. 1414 * 8. for non-realtime files, the extent size hint must be limited 1415 * to half the AG size to avoid alignment extending the extent beyond the 1416 * limits of the AG. 1417 * 1418 * Please keep this function in sync with xfs_scrub_inode_extsize. 1419 */ 1420 static int 1421 xfs_ioctl_setattr_check_extsize( 1422 struct xfs_inode *ip, 1423 struct fsxattr *fa) 1424 { 1425 struct xfs_mount *mp = ip->i_mount; 1426 xfs_extlen_t size; 1427 xfs_fsblock_t extsize_fsb; 1428 1429 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents && 1430 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1431 return -EINVAL; 1432 1433 if (fa->fsx_extsize == 0) 1434 return 0; 1435 1436 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1437 if (extsize_fsb > MAXEXTLEN) 1438 return -EINVAL; 1439 1440 if (XFS_IS_REALTIME_INODE(ip) || 1441 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1442 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1443 } else { 1444 size = mp->m_sb.sb_blocksize; 1445 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1446 return -EINVAL; 1447 } 1448 1449 if (fa->fsx_extsize % size) 1450 return -EINVAL; 1451 1452 return 0; 1453 } 1454 1455 /* 1456 * CoW extent size hint validation rules are: 1457 * 1458 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1459 * The inode does not have to have any shared blocks, but it must be a v3. 1460 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1461 * for a directory, the hint is propagated to new files. 1462 * 3. Can be changed on files & directories at any time. 1463 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1464 * 5. Extent size must be a multiple of the appropriate block size. 1465 * 6. The extent size hint must be limited to half the AG size to avoid 1466 * alignment extending the extent beyond the limits of the AG. 1467 * 1468 * Please keep this function in sync with xfs_scrub_inode_cowextsize. 1469 */ 1470 static int 1471 xfs_ioctl_setattr_check_cowextsize( 1472 struct xfs_inode *ip, 1473 struct fsxattr *fa) 1474 { 1475 struct xfs_mount *mp = ip->i_mount; 1476 xfs_extlen_t size; 1477 xfs_fsblock_t cowextsize_fsb; 1478 1479 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1480 return 0; 1481 1482 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) || 1483 ip->i_d.di_version != 3) 1484 return -EINVAL; 1485 1486 if (fa->fsx_cowextsize == 0) 1487 return 0; 1488 1489 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1490 if (cowextsize_fsb > MAXEXTLEN) 1491 return -EINVAL; 1492 1493 size = mp->m_sb.sb_blocksize; 1494 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1495 return -EINVAL; 1496 1497 if (fa->fsx_cowextsize % size) 1498 return -EINVAL; 1499 1500 return 0; 1501 } 1502 1503 static int 1504 xfs_ioctl_setattr_check_projid( 1505 struct xfs_inode *ip, 1506 struct fsxattr *fa) 1507 { 1508 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1509 if (fa->fsx_projid > (uint16_t)-1 && 1510 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1511 return -EINVAL; 1512 return 0; 1513 } 1514 1515 STATIC int 1516 xfs_ioctl_setattr( 1517 xfs_inode_t *ip, 1518 struct fsxattr *fa) 1519 { 1520 struct fsxattr old_fa; 1521 struct xfs_mount *mp = ip->i_mount; 1522 struct xfs_trans *tp; 1523 struct xfs_dquot *udqp = NULL; 1524 struct xfs_dquot *pdqp = NULL; 1525 struct xfs_dquot *olddquot = NULL; 1526 int code; 1527 int join_flags = 0; 1528 1529 trace_xfs_ioctl_setattr(ip); 1530 1531 code = xfs_ioctl_setattr_check_projid(ip, fa); 1532 if (code) 1533 return code; 1534 1535 /* 1536 * If disk quotas is on, we make sure that the dquots do exist on disk, 1537 * before we start any other transactions. Trying to do this later 1538 * is messy. We don't care to take a readlock to look at the ids 1539 * in inode here, because we can't hold it across the trans_reserve. 1540 * If the IDs do change before we take the ilock, we're covered 1541 * because the i_*dquot fields will get updated anyway. 1542 */ 1543 if (XFS_IS_QUOTA_ON(mp)) { 1544 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1545 ip->i_d.di_gid, fa->fsx_projid, 1546 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1547 if (code) 1548 return code; 1549 } 1550 1551 /* 1552 * Changing DAX config may require inode locking for mapping 1553 * invalidation. These need to be held all the way to transaction commit 1554 * or cancel time, so need to be passed through to 1555 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1556 * appropriately. 1557 */ 1558 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags); 1559 if (code) 1560 goto error_free_dquots; 1561 1562 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1563 if (IS_ERR(tp)) { 1564 code = PTR_ERR(tp); 1565 goto error_free_dquots; 1566 } 1567 1568 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1569 xfs_get_projid(ip) != fa->fsx_projid) { 1570 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1571 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1572 if (code) /* out of quota */ 1573 goto error_trans_cancel; 1574 } 1575 1576 xfs_fill_fsxattr(ip, false, &old_fa); 1577 code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa); 1578 if (code) 1579 goto error_trans_cancel; 1580 1581 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1582 if (code) 1583 goto error_trans_cancel; 1584 1585 code = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1586 if (code) 1587 goto error_trans_cancel; 1588 1589 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1590 if (code) 1591 goto error_trans_cancel; 1592 1593 /* 1594 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1595 * overrides the following restrictions: 1596 * 1597 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1598 * successful return from chown() 1599 */ 1600 1601 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1602 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1603 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1604 1605 /* Change the ownerships and register project quota modifications */ 1606 if (xfs_get_projid(ip) != fa->fsx_projid) { 1607 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1608 olddquot = xfs_qm_vop_chown(tp, ip, 1609 &ip->i_pdquot, pdqp); 1610 } 1611 ASSERT(ip->i_d.di_version > 1); 1612 xfs_set_projid(ip, fa->fsx_projid); 1613 } 1614 1615 /* 1616 * Only set the extent size hint if we've already determined that the 1617 * extent size hint should be set on the inode. If no extent size flags 1618 * are set on the inode then unconditionally clear the extent size hint. 1619 */ 1620 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1621 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1622 else 1623 ip->i_d.di_extsize = 0; 1624 if (ip->i_d.di_version == 3 && 1625 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) 1626 ip->i_d.di_cowextsize = fa->fsx_cowextsize >> 1627 mp->m_sb.sb_blocklog; 1628 else 1629 ip->i_d.di_cowextsize = 0; 1630 1631 code = xfs_trans_commit(tp); 1632 1633 /* 1634 * Release any dquot(s) the inode had kept before chown. 1635 */ 1636 xfs_qm_dqrele(olddquot); 1637 xfs_qm_dqrele(udqp); 1638 xfs_qm_dqrele(pdqp); 1639 1640 return code; 1641 1642 error_trans_cancel: 1643 xfs_trans_cancel(tp); 1644 error_free_dquots: 1645 xfs_qm_dqrele(udqp); 1646 xfs_qm_dqrele(pdqp); 1647 return code; 1648 } 1649 1650 STATIC int 1651 xfs_ioc_fssetxattr( 1652 xfs_inode_t *ip, 1653 struct file *filp, 1654 void __user *arg) 1655 { 1656 struct fsxattr fa; 1657 int error; 1658 1659 if (copy_from_user(&fa, arg, sizeof(fa))) 1660 return -EFAULT; 1661 1662 error = mnt_want_write_file(filp); 1663 if (error) 1664 return error; 1665 error = xfs_ioctl_setattr(ip, &fa); 1666 mnt_drop_write_file(filp); 1667 return error; 1668 } 1669 1670 STATIC int 1671 xfs_ioc_getxflags( 1672 xfs_inode_t *ip, 1673 void __user *arg) 1674 { 1675 unsigned int flags; 1676 1677 flags = xfs_di2lxflags(ip->i_d.di_flags); 1678 if (copy_to_user(arg, &flags, sizeof(flags))) 1679 return -EFAULT; 1680 return 0; 1681 } 1682 1683 STATIC int 1684 xfs_ioc_setxflags( 1685 struct xfs_inode *ip, 1686 struct file *filp, 1687 void __user *arg) 1688 { 1689 struct xfs_trans *tp; 1690 struct fsxattr fa; 1691 struct fsxattr old_fa; 1692 unsigned int flags; 1693 int join_flags = 0; 1694 int error; 1695 1696 if (copy_from_user(&flags, arg, sizeof(flags))) 1697 return -EFAULT; 1698 1699 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1700 FS_NOATIME_FL | FS_NODUMP_FL | \ 1701 FS_SYNC_FL)) 1702 return -EOPNOTSUPP; 1703 1704 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1705 1706 error = mnt_want_write_file(filp); 1707 if (error) 1708 return error; 1709 1710 /* 1711 * Changing DAX config may require inode locking for mapping 1712 * invalidation. These need to be held all the way to transaction commit 1713 * or cancel time, so need to be passed through to 1714 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1715 * appropriately. 1716 */ 1717 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags); 1718 if (error) 1719 goto out_drop_write; 1720 1721 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1722 if (IS_ERR(tp)) { 1723 error = PTR_ERR(tp); 1724 goto out_drop_write; 1725 } 1726 1727 xfs_fill_fsxattr(ip, false, &old_fa); 1728 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa); 1729 if (error) { 1730 xfs_trans_cancel(tp); 1731 goto out_drop_write; 1732 } 1733 1734 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1735 if (error) { 1736 xfs_trans_cancel(tp); 1737 goto out_drop_write; 1738 } 1739 1740 error = xfs_trans_commit(tp); 1741 out_drop_write: 1742 mnt_drop_write_file(filp); 1743 return error; 1744 } 1745 1746 static bool 1747 xfs_getbmap_format( 1748 struct kgetbmap *p, 1749 struct getbmapx __user *u, 1750 size_t recsize) 1751 { 1752 if (put_user(p->bmv_offset, &u->bmv_offset) || 1753 put_user(p->bmv_block, &u->bmv_block) || 1754 put_user(p->bmv_length, &u->bmv_length) || 1755 put_user(0, &u->bmv_count) || 1756 put_user(0, &u->bmv_entries)) 1757 return false; 1758 if (recsize < sizeof(struct getbmapx)) 1759 return true; 1760 if (put_user(0, &u->bmv_iflags) || 1761 put_user(p->bmv_oflags, &u->bmv_oflags) || 1762 put_user(0, &u->bmv_unused1) || 1763 put_user(0, &u->bmv_unused2)) 1764 return false; 1765 return true; 1766 } 1767 1768 STATIC int 1769 xfs_ioc_getbmap( 1770 struct file *file, 1771 unsigned int cmd, 1772 void __user *arg) 1773 { 1774 struct getbmapx bmx = { 0 }; 1775 struct kgetbmap *buf; 1776 size_t recsize; 1777 int error, i; 1778 1779 switch (cmd) { 1780 case XFS_IOC_GETBMAPA: 1781 bmx.bmv_iflags = BMV_IF_ATTRFORK; 1782 /*FALLTHRU*/ 1783 case XFS_IOC_GETBMAP: 1784 if (file->f_mode & FMODE_NOCMTIME) 1785 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1786 /* struct getbmap is a strict subset of struct getbmapx. */ 1787 recsize = sizeof(struct getbmap); 1788 break; 1789 case XFS_IOC_GETBMAPX: 1790 recsize = sizeof(struct getbmapx); 1791 break; 1792 default: 1793 return -EINVAL; 1794 } 1795 1796 if (copy_from_user(&bmx, arg, recsize)) 1797 return -EFAULT; 1798 1799 if (bmx.bmv_count < 2) 1800 return -EINVAL; 1801 if (bmx.bmv_count > ULONG_MAX / recsize) 1802 return -ENOMEM; 1803 1804 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0); 1805 if (!buf) 1806 return -ENOMEM; 1807 1808 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf); 1809 if (error) 1810 goto out_free_buf; 1811 1812 error = -EFAULT; 1813 if (copy_to_user(arg, &bmx, recsize)) 1814 goto out_free_buf; 1815 arg += recsize; 1816 1817 for (i = 0; i < bmx.bmv_entries; i++) { 1818 if (!xfs_getbmap_format(buf + i, arg, recsize)) 1819 goto out_free_buf; 1820 arg += recsize; 1821 } 1822 1823 error = 0; 1824 out_free_buf: 1825 kmem_free(buf); 1826 return error; 1827 } 1828 1829 struct getfsmap_info { 1830 struct xfs_mount *mp; 1831 struct fsmap_head __user *data; 1832 unsigned int idx; 1833 __u32 last_flags; 1834 }; 1835 1836 STATIC int 1837 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv) 1838 { 1839 struct getfsmap_info *info = priv; 1840 struct fsmap fm; 1841 1842 trace_xfs_getfsmap_mapping(info->mp, xfm); 1843 1844 info->last_flags = xfm->fmr_flags; 1845 xfs_fsmap_from_internal(&fm, xfm); 1846 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm, 1847 sizeof(struct fsmap))) 1848 return -EFAULT; 1849 1850 return 0; 1851 } 1852 1853 STATIC int 1854 xfs_ioc_getfsmap( 1855 struct xfs_inode *ip, 1856 struct fsmap_head __user *arg) 1857 { 1858 struct getfsmap_info info = { NULL }; 1859 struct xfs_fsmap_head xhead = {0}; 1860 struct fsmap_head head; 1861 bool aborted = false; 1862 int error; 1863 1864 if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 1865 return -EFAULT; 1866 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 1867 memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 1868 sizeof(head.fmh_keys[0].fmr_reserved)) || 1869 memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 1870 sizeof(head.fmh_keys[1].fmr_reserved))) 1871 return -EINVAL; 1872 1873 xhead.fmh_iflags = head.fmh_iflags; 1874 xhead.fmh_count = head.fmh_count; 1875 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]); 1876 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]); 1877 1878 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]); 1879 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]); 1880 1881 info.mp = ip->i_mount; 1882 info.data = arg; 1883 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info); 1884 if (error == XFS_BTREE_QUERY_RANGE_ABORT) { 1885 error = 0; 1886 aborted = true; 1887 } else if (error) 1888 return error; 1889 1890 /* If we didn't abort, set the "last" flag in the last fmx */ 1891 if (!aborted && info.idx) { 1892 info.last_flags |= FMR_OF_LAST; 1893 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags, 1894 &info.last_flags, sizeof(info.last_flags))) 1895 return -EFAULT; 1896 } 1897 1898 /* copy back header */ 1899 head.fmh_entries = xhead.fmh_entries; 1900 head.fmh_oflags = xhead.fmh_oflags; 1901 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 1902 return -EFAULT; 1903 1904 return 0; 1905 } 1906 1907 STATIC int 1908 xfs_ioc_scrub_metadata( 1909 struct xfs_inode *ip, 1910 void __user *arg) 1911 { 1912 struct xfs_scrub_metadata scrub; 1913 int error; 1914 1915 if (!capable(CAP_SYS_ADMIN)) 1916 return -EPERM; 1917 1918 if (copy_from_user(&scrub, arg, sizeof(scrub))) 1919 return -EFAULT; 1920 1921 error = xfs_scrub_metadata(ip, &scrub); 1922 if (error) 1923 return error; 1924 1925 if (copy_to_user(arg, &scrub, sizeof(scrub))) 1926 return -EFAULT; 1927 1928 return 0; 1929 } 1930 1931 int 1932 xfs_ioc_swapext( 1933 xfs_swapext_t *sxp) 1934 { 1935 xfs_inode_t *ip, *tip; 1936 struct fd f, tmp; 1937 int error = 0; 1938 1939 /* Pull information for the target fd */ 1940 f = fdget((int)sxp->sx_fdtarget); 1941 if (!f.file) { 1942 error = -EINVAL; 1943 goto out; 1944 } 1945 1946 if (!(f.file->f_mode & FMODE_WRITE) || 1947 !(f.file->f_mode & FMODE_READ) || 1948 (f.file->f_flags & O_APPEND)) { 1949 error = -EBADF; 1950 goto out_put_file; 1951 } 1952 1953 tmp = fdget((int)sxp->sx_fdtmp); 1954 if (!tmp.file) { 1955 error = -EINVAL; 1956 goto out_put_file; 1957 } 1958 1959 if (!(tmp.file->f_mode & FMODE_WRITE) || 1960 !(tmp.file->f_mode & FMODE_READ) || 1961 (tmp.file->f_flags & O_APPEND)) { 1962 error = -EBADF; 1963 goto out_put_tmp_file; 1964 } 1965 1966 if (IS_SWAPFILE(file_inode(f.file)) || 1967 IS_SWAPFILE(file_inode(tmp.file))) { 1968 error = -EINVAL; 1969 goto out_put_tmp_file; 1970 } 1971 1972 /* 1973 * We need to ensure that the fds passed in point to XFS inodes 1974 * before we cast and access them as XFS structures as we have no 1975 * control over what the user passes us here. 1976 */ 1977 if (f.file->f_op != &xfs_file_operations || 1978 tmp.file->f_op != &xfs_file_operations) { 1979 error = -EINVAL; 1980 goto out_put_tmp_file; 1981 } 1982 1983 ip = XFS_I(file_inode(f.file)); 1984 tip = XFS_I(file_inode(tmp.file)); 1985 1986 if (ip->i_mount != tip->i_mount) { 1987 error = -EINVAL; 1988 goto out_put_tmp_file; 1989 } 1990 1991 if (ip->i_ino == tip->i_ino) { 1992 error = -EINVAL; 1993 goto out_put_tmp_file; 1994 } 1995 1996 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1997 error = -EIO; 1998 goto out_put_tmp_file; 1999 } 2000 2001 error = xfs_swap_extents(ip, tip, sxp); 2002 2003 out_put_tmp_file: 2004 fdput(tmp); 2005 out_put_file: 2006 fdput(f); 2007 out: 2008 return error; 2009 } 2010 2011 static int 2012 xfs_ioc_getlabel( 2013 struct xfs_mount *mp, 2014 char __user *user_label) 2015 { 2016 struct xfs_sb *sbp = &mp->m_sb; 2017 char label[XFSLABEL_MAX + 1]; 2018 2019 /* Paranoia */ 2020 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX); 2021 2022 /* 1 larger than sb_fname, so this ensures a trailing NUL char */ 2023 memset(label, 0, sizeof(label)); 2024 spin_lock(&mp->m_sb_lock); 2025 strncpy(label, sbp->sb_fname, XFSLABEL_MAX); 2026 spin_unlock(&mp->m_sb_lock); 2027 2028 if (copy_to_user(user_label, label, sizeof(label))) 2029 return -EFAULT; 2030 return 0; 2031 } 2032 2033 static int 2034 xfs_ioc_setlabel( 2035 struct file *filp, 2036 struct xfs_mount *mp, 2037 char __user *newlabel) 2038 { 2039 struct xfs_sb *sbp = &mp->m_sb; 2040 char label[XFSLABEL_MAX + 1]; 2041 size_t len; 2042 int error; 2043 2044 if (!capable(CAP_SYS_ADMIN)) 2045 return -EPERM; 2046 /* 2047 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much 2048 * smaller, at 12 bytes. We copy one more to be sure we find the 2049 * (required) NULL character to test the incoming label length. 2050 * NB: The on disk label doesn't need to be null terminated. 2051 */ 2052 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1)) 2053 return -EFAULT; 2054 len = strnlen(label, XFSLABEL_MAX + 1); 2055 if (len > sizeof(sbp->sb_fname)) 2056 return -EINVAL; 2057 2058 error = mnt_want_write_file(filp); 2059 if (error) 2060 return error; 2061 2062 spin_lock(&mp->m_sb_lock); 2063 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname)); 2064 memcpy(sbp->sb_fname, label, len); 2065 spin_unlock(&mp->m_sb_lock); 2066 2067 /* 2068 * Now we do several things to satisfy userspace. 2069 * In addition to normal logging of the primary superblock, we also 2070 * immediately write these changes to sector zero for the primary, then 2071 * update all backup supers (as xfs_db does for a label change), then 2072 * invalidate the block device page cache. This is so that any prior 2073 * buffered reads from userspace (i.e. from blkid) are invalidated, 2074 * and userspace will see the newly-written label. 2075 */ 2076 error = xfs_sync_sb_buf(mp); 2077 if (error) 2078 goto out; 2079 /* 2080 * growfs also updates backup supers so lock against that. 2081 */ 2082 mutex_lock(&mp->m_growlock); 2083 error = xfs_update_secondary_sbs(mp); 2084 mutex_unlock(&mp->m_growlock); 2085 2086 invalidate_bdev(mp->m_ddev_targp->bt_bdev); 2087 2088 out: 2089 mnt_drop_write_file(filp); 2090 return error; 2091 } 2092 2093 /* 2094 * Note: some of the ioctl's return positive numbers as a 2095 * byte count indicating success, such as readlink_by_handle. 2096 * So we don't "sign flip" like most other routines. This means 2097 * true errors need to be returned as a negative value. 2098 */ 2099 long 2100 xfs_file_ioctl( 2101 struct file *filp, 2102 unsigned int cmd, 2103 unsigned long p) 2104 { 2105 struct inode *inode = file_inode(filp); 2106 struct xfs_inode *ip = XFS_I(inode); 2107 struct xfs_mount *mp = ip->i_mount; 2108 void __user *arg = (void __user *)p; 2109 int error; 2110 2111 trace_xfs_file_ioctl(ip); 2112 2113 switch (cmd) { 2114 case FITRIM: 2115 return xfs_ioc_trim(mp, arg); 2116 case FS_IOC_GETFSLABEL: 2117 return xfs_ioc_getlabel(mp, arg); 2118 case FS_IOC_SETFSLABEL: 2119 return xfs_ioc_setlabel(filp, mp, arg); 2120 case XFS_IOC_ALLOCSP: 2121 case XFS_IOC_FREESP: 2122 case XFS_IOC_RESVSP: 2123 case XFS_IOC_UNRESVSP: 2124 case XFS_IOC_ALLOCSP64: 2125 case XFS_IOC_FREESP64: 2126 case XFS_IOC_RESVSP64: 2127 case XFS_IOC_UNRESVSP64: 2128 case XFS_IOC_ZERO_RANGE: { 2129 xfs_flock64_t bf; 2130 2131 if (copy_from_user(&bf, arg, sizeof(bf))) 2132 return -EFAULT; 2133 return xfs_ioc_space(filp, cmd, &bf); 2134 } 2135 case XFS_IOC_DIOINFO: { 2136 struct dioattr da; 2137 xfs_buftarg_t *target = 2138 XFS_IS_REALTIME_INODE(ip) ? 2139 mp->m_rtdev_targp : mp->m_ddev_targp; 2140 2141 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 2142 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 2143 2144 if (copy_to_user(arg, &da, sizeof(da))) 2145 return -EFAULT; 2146 return 0; 2147 } 2148 2149 case XFS_IOC_FSBULKSTAT_SINGLE: 2150 case XFS_IOC_FSBULKSTAT: 2151 case XFS_IOC_FSINUMBERS: 2152 return xfs_ioc_fsbulkstat(mp, cmd, arg); 2153 2154 case XFS_IOC_BULKSTAT: 2155 return xfs_ioc_bulkstat(mp, cmd, arg); 2156 case XFS_IOC_INUMBERS: 2157 return xfs_ioc_inumbers(mp, cmd, arg); 2158 2159 case XFS_IOC_FSGEOMETRY_V1: 2160 return xfs_ioc_fsgeometry(mp, arg, 3); 2161 case XFS_IOC_FSGEOMETRY_V4: 2162 return xfs_ioc_fsgeometry(mp, arg, 4); 2163 case XFS_IOC_FSGEOMETRY: 2164 return xfs_ioc_fsgeometry(mp, arg, 5); 2165 2166 case XFS_IOC_AG_GEOMETRY: 2167 return xfs_ioc_ag_geometry(mp, arg); 2168 2169 case XFS_IOC_GETVERSION: 2170 return put_user(inode->i_generation, (int __user *)arg); 2171 2172 case XFS_IOC_FSGETXATTR: 2173 return xfs_ioc_fsgetxattr(ip, 0, arg); 2174 case XFS_IOC_FSGETXATTRA: 2175 return xfs_ioc_fsgetxattr(ip, 1, arg); 2176 case XFS_IOC_FSSETXATTR: 2177 return xfs_ioc_fssetxattr(ip, filp, arg); 2178 case XFS_IOC_GETXFLAGS: 2179 return xfs_ioc_getxflags(ip, arg); 2180 case XFS_IOC_SETXFLAGS: 2181 return xfs_ioc_setxflags(ip, filp, arg); 2182 2183 case XFS_IOC_FSSETDM: { 2184 struct fsdmidata dmi; 2185 2186 if (copy_from_user(&dmi, arg, sizeof(dmi))) 2187 return -EFAULT; 2188 2189 error = mnt_want_write_file(filp); 2190 if (error) 2191 return error; 2192 2193 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 2194 dmi.fsd_dmstate); 2195 mnt_drop_write_file(filp); 2196 return error; 2197 } 2198 2199 case XFS_IOC_GETBMAP: 2200 case XFS_IOC_GETBMAPA: 2201 case XFS_IOC_GETBMAPX: 2202 return xfs_ioc_getbmap(filp, cmd, arg); 2203 2204 case FS_IOC_GETFSMAP: 2205 return xfs_ioc_getfsmap(ip, arg); 2206 2207 case XFS_IOC_SCRUB_METADATA: 2208 return xfs_ioc_scrub_metadata(ip, arg); 2209 2210 case XFS_IOC_FD_TO_HANDLE: 2211 case XFS_IOC_PATH_TO_HANDLE: 2212 case XFS_IOC_PATH_TO_FSHANDLE: { 2213 xfs_fsop_handlereq_t hreq; 2214 2215 if (copy_from_user(&hreq, arg, sizeof(hreq))) 2216 return -EFAULT; 2217 return xfs_find_handle(cmd, &hreq); 2218 } 2219 case XFS_IOC_OPEN_BY_HANDLE: { 2220 xfs_fsop_handlereq_t hreq; 2221 2222 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2223 return -EFAULT; 2224 return xfs_open_by_handle(filp, &hreq); 2225 } 2226 case XFS_IOC_FSSETDM_BY_HANDLE: 2227 return xfs_fssetdm_by_handle(filp, arg); 2228 2229 case XFS_IOC_READLINK_BY_HANDLE: { 2230 xfs_fsop_handlereq_t hreq; 2231 2232 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 2233 return -EFAULT; 2234 return xfs_readlink_by_handle(filp, &hreq); 2235 } 2236 case XFS_IOC_ATTRLIST_BY_HANDLE: 2237 return xfs_attrlist_by_handle(filp, arg); 2238 2239 case XFS_IOC_ATTRMULTI_BY_HANDLE: 2240 return xfs_attrmulti_by_handle(filp, arg); 2241 2242 case XFS_IOC_SWAPEXT: { 2243 struct xfs_swapext sxp; 2244 2245 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 2246 return -EFAULT; 2247 error = mnt_want_write_file(filp); 2248 if (error) 2249 return error; 2250 error = xfs_ioc_swapext(&sxp); 2251 mnt_drop_write_file(filp); 2252 return error; 2253 } 2254 2255 case XFS_IOC_FSCOUNTS: { 2256 xfs_fsop_counts_t out; 2257 2258 xfs_fs_counts(mp, &out); 2259 2260 if (copy_to_user(arg, &out, sizeof(out))) 2261 return -EFAULT; 2262 return 0; 2263 } 2264 2265 case XFS_IOC_SET_RESBLKS: { 2266 xfs_fsop_resblks_t inout; 2267 uint64_t in; 2268 2269 if (!capable(CAP_SYS_ADMIN)) 2270 return -EPERM; 2271 2272 if (mp->m_flags & XFS_MOUNT_RDONLY) 2273 return -EROFS; 2274 2275 if (copy_from_user(&inout, arg, sizeof(inout))) 2276 return -EFAULT; 2277 2278 error = mnt_want_write_file(filp); 2279 if (error) 2280 return error; 2281 2282 /* input parameter is passed in resblks field of structure */ 2283 in = inout.resblks; 2284 error = xfs_reserve_blocks(mp, &in, &inout); 2285 mnt_drop_write_file(filp); 2286 if (error) 2287 return error; 2288 2289 if (copy_to_user(arg, &inout, sizeof(inout))) 2290 return -EFAULT; 2291 return 0; 2292 } 2293 2294 case XFS_IOC_GET_RESBLKS: { 2295 xfs_fsop_resblks_t out; 2296 2297 if (!capable(CAP_SYS_ADMIN)) 2298 return -EPERM; 2299 2300 error = xfs_reserve_blocks(mp, NULL, &out); 2301 if (error) 2302 return error; 2303 2304 if (copy_to_user(arg, &out, sizeof(out))) 2305 return -EFAULT; 2306 2307 return 0; 2308 } 2309 2310 case XFS_IOC_FSGROWFSDATA: { 2311 xfs_growfs_data_t in; 2312 2313 if (copy_from_user(&in, arg, sizeof(in))) 2314 return -EFAULT; 2315 2316 error = mnt_want_write_file(filp); 2317 if (error) 2318 return error; 2319 error = xfs_growfs_data(mp, &in); 2320 mnt_drop_write_file(filp); 2321 return error; 2322 } 2323 2324 case XFS_IOC_FSGROWFSLOG: { 2325 xfs_growfs_log_t in; 2326 2327 if (copy_from_user(&in, arg, sizeof(in))) 2328 return -EFAULT; 2329 2330 error = mnt_want_write_file(filp); 2331 if (error) 2332 return error; 2333 error = xfs_growfs_log(mp, &in); 2334 mnt_drop_write_file(filp); 2335 return error; 2336 } 2337 2338 case XFS_IOC_FSGROWFSRT: { 2339 xfs_growfs_rt_t in; 2340 2341 if (copy_from_user(&in, arg, sizeof(in))) 2342 return -EFAULT; 2343 2344 error = mnt_want_write_file(filp); 2345 if (error) 2346 return error; 2347 error = xfs_growfs_rt(mp, &in); 2348 mnt_drop_write_file(filp); 2349 return error; 2350 } 2351 2352 case XFS_IOC_GOINGDOWN: { 2353 uint32_t in; 2354 2355 if (!capable(CAP_SYS_ADMIN)) 2356 return -EPERM; 2357 2358 if (get_user(in, (uint32_t __user *)arg)) 2359 return -EFAULT; 2360 2361 return xfs_fs_goingdown(mp, in); 2362 } 2363 2364 case XFS_IOC_ERROR_INJECTION: { 2365 xfs_error_injection_t in; 2366 2367 if (!capable(CAP_SYS_ADMIN)) 2368 return -EPERM; 2369 2370 if (copy_from_user(&in, arg, sizeof(in))) 2371 return -EFAULT; 2372 2373 return xfs_errortag_add(mp, in.errtag); 2374 } 2375 2376 case XFS_IOC_ERROR_CLEARALL: 2377 if (!capable(CAP_SYS_ADMIN)) 2378 return -EPERM; 2379 2380 return xfs_errortag_clearall(mp); 2381 2382 case XFS_IOC_FREE_EOFBLOCKS: { 2383 struct xfs_fs_eofblocks eofb; 2384 struct xfs_eofblocks keofb; 2385 2386 if (!capable(CAP_SYS_ADMIN)) 2387 return -EPERM; 2388 2389 if (mp->m_flags & XFS_MOUNT_RDONLY) 2390 return -EROFS; 2391 2392 if (copy_from_user(&eofb, arg, sizeof(eofb))) 2393 return -EFAULT; 2394 2395 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 2396 if (error) 2397 return error; 2398 2399 return xfs_icache_free_eofblocks(mp, &keofb); 2400 } 2401 2402 default: 2403 return -ENOTTY; 2404 } 2405 } 2406