1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #include "xfs.h" 19 #include "xfs_fs.h" 20 #include "xfs_shared.h" 21 #include "xfs_format.h" 22 #include "xfs_log_format.h" 23 #include "xfs_trans_resv.h" 24 #include "xfs_mount.h" 25 #include "xfs_inode.h" 26 #include "xfs_ioctl.h" 27 #include "xfs_alloc.h" 28 #include "xfs_rtalloc.h" 29 #include "xfs_itable.h" 30 #include "xfs_error.h" 31 #include "xfs_attr.h" 32 #include "xfs_bmap.h" 33 #include "xfs_bmap_util.h" 34 #include "xfs_fsops.h" 35 #include "xfs_discard.h" 36 #include "xfs_quota.h" 37 #include "xfs_export.h" 38 #include "xfs_trace.h" 39 #include "xfs_icache.h" 40 #include "xfs_symlink.h" 41 #include "xfs_trans.h" 42 #include "xfs_pnfs.h" 43 #include "xfs_acl.h" 44 45 #include <linux/capability.h> 46 #include <linux/dcache.h> 47 #include <linux/mount.h> 48 #include <linux/namei.h> 49 #include <linux/pagemap.h> 50 #include <linux/slab.h> 51 #include <linux/exportfs.h> 52 53 /* 54 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 55 * a file or fs handle. 56 * 57 * XFS_IOC_PATH_TO_FSHANDLE 58 * returns fs handle for a mount point or path within that mount point 59 * XFS_IOC_FD_TO_HANDLE 60 * returns full handle for a FD opened in user space 61 * XFS_IOC_PATH_TO_HANDLE 62 * returns full handle for a path 63 */ 64 int 65 xfs_find_handle( 66 unsigned int cmd, 67 xfs_fsop_handlereq_t *hreq) 68 { 69 int hsize; 70 xfs_handle_t handle; 71 struct inode *inode; 72 struct fd f = {NULL}; 73 struct path path; 74 int error; 75 struct xfs_inode *ip; 76 77 if (cmd == XFS_IOC_FD_TO_HANDLE) { 78 f = fdget(hreq->fd); 79 if (!f.file) 80 return -EBADF; 81 inode = file_inode(f.file); 82 } else { 83 error = user_lpath((const char __user *)hreq->path, &path); 84 if (error) 85 return error; 86 inode = d_inode(path.dentry); 87 } 88 ip = XFS_I(inode); 89 90 /* 91 * We can only generate handles for inodes residing on a XFS filesystem, 92 * and only for regular files, directories or symbolic links. 93 */ 94 error = -EINVAL; 95 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 96 goto out_put; 97 98 error = -EBADF; 99 if (!S_ISREG(inode->i_mode) && 100 !S_ISDIR(inode->i_mode) && 101 !S_ISLNK(inode->i_mode)) 102 goto out_put; 103 104 105 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 106 107 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 108 /* 109 * This handle only contains an fsid, zero the rest. 110 */ 111 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 112 hsize = sizeof(xfs_fsid_t); 113 } else { 114 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 115 sizeof(handle.ha_fid.fid_len); 116 handle.ha_fid.fid_pad = 0; 117 handle.ha_fid.fid_gen = inode->i_generation; 118 handle.ha_fid.fid_ino = ip->i_ino; 119 120 hsize = XFS_HSIZE(handle); 121 } 122 123 error = -EFAULT; 124 if (copy_to_user(hreq->ohandle, &handle, hsize) || 125 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 126 goto out_put; 127 128 error = 0; 129 130 out_put: 131 if (cmd == XFS_IOC_FD_TO_HANDLE) 132 fdput(f); 133 else 134 path_put(&path); 135 return error; 136 } 137 138 /* 139 * No need to do permission checks on the various pathname components 140 * as the handle operations are privileged. 141 */ 142 STATIC int 143 xfs_handle_acceptable( 144 void *context, 145 struct dentry *dentry) 146 { 147 return 1; 148 } 149 150 /* 151 * Convert userspace handle data into a dentry. 152 */ 153 struct dentry * 154 xfs_handle_to_dentry( 155 struct file *parfilp, 156 void __user *uhandle, 157 u32 hlen) 158 { 159 xfs_handle_t handle; 160 struct xfs_fid64 fid; 161 162 /* 163 * Only allow handle opens under a directory. 164 */ 165 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 166 return ERR_PTR(-ENOTDIR); 167 168 if (hlen != sizeof(xfs_handle_t)) 169 return ERR_PTR(-EINVAL); 170 if (copy_from_user(&handle, uhandle, hlen)) 171 return ERR_PTR(-EFAULT); 172 if (handle.ha_fid.fid_len != 173 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 174 return ERR_PTR(-EINVAL); 175 176 memset(&fid, 0, sizeof(struct fid)); 177 fid.ino = handle.ha_fid.fid_ino; 178 fid.gen = handle.ha_fid.fid_gen; 179 180 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 181 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 182 xfs_handle_acceptable, NULL); 183 } 184 185 STATIC struct dentry * 186 xfs_handlereq_to_dentry( 187 struct file *parfilp, 188 xfs_fsop_handlereq_t *hreq) 189 { 190 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 191 } 192 193 int 194 xfs_open_by_handle( 195 struct file *parfilp, 196 xfs_fsop_handlereq_t *hreq) 197 { 198 const struct cred *cred = current_cred(); 199 int error; 200 int fd; 201 int permflag; 202 struct file *filp; 203 struct inode *inode; 204 struct dentry *dentry; 205 fmode_t fmode; 206 struct path path; 207 208 if (!capable(CAP_SYS_ADMIN)) 209 return -EPERM; 210 211 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 212 if (IS_ERR(dentry)) 213 return PTR_ERR(dentry); 214 inode = d_inode(dentry); 215 216 /* Restrict xfs_open_by_handle to directories & regular files. */ 217 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 218 error = -EPERM; 219 goto out_dput; 220 } 221 222 #if BITS_PER_LONG != 32 223 hreq->oflags |= O_LARGEFILE; 224 #endif 225 226 permflag = hreq->oflags; 227 fmode = OPEN_FMODE(permflag); 228 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 229 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 230 error = -EPERM; 231 goto out_dput; 232 } 233 234 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 235 error = -EACCES; 236 goto out_dput; 237 } 238 239 /* Can't write directories. */ 240 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 241 error = -EISDIR; 242 goto out_dput; 243 } 244 245 fd = get_unused_fd_flags(0); 246 if (fd < 0) { 247 error = fd; 248 goto out_dput; 249 } 250 251 path.mnt = parfilp->f_path.mnt; 252 path.dentry = dentry; 253 filp = dentry_open(&path, hreq->oflags, cred); 254 dput(dentry); 255 if (IS_ERR(filp)) { 256 put_unused_fd(fd); 257 return PTR_ERR(filp); 258 } 259 260 if (S_ISREG(inode->i_mode)) { 261 filp->f_flags |= O_NOATIME; 262 filp->f_mode |= FMODE_NOCMTIME; 263 } 264 265 fd_install(fd, filp); 266 return fd; 267 268 out_dput: 269 dput(dentry); 270 return error; 271 } 272 273 int 274 xfs_readlink_by_handle( 275 struct file *parfilp, 276 xfs_fsop_handlereq_t *hreq) 277 { 278 struct dentry *dentry; 279 __u32 olen; 280 int error; 281 282 if (!capable(CAP_SYS_ADMIN)) 283 return -EPERM; 284 285 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 286 if (IS_ERR(dentry)) 287 return PTR_ERR(dentry); 288 289 /* Restrict this handle operation to symlinks only. */ 290 if (!d_inode(dentry)->i_op->readlink) { 291 error = -EINVAL; 292 goto out_dput; 293 } 294 295 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 296 error = -EFAULT; 297 goto out_dput; 298 } 299 300 error = d_inode(dentry)->i_op->readlink(dentry, hreq->ohandle, olen); 301 302 out_dput: 303 dput(dentry); 304 return error; 305 } 306 307 int 308 xfs_set_dmattrs( 309 xfs_inode_t *ip, 310 u_int evmask, 311 u_int16_t state) 312 { 313 xfs_mount_t *mp = ip->i_mount; 314 xfs_trans_t *tp; 315 int error; 316 317 if (!capable(CAP_SYS_ADMIN)) 318 return -EPERM; 319 320 if (XFS_FORCED_SHUTDOWN(mp)) 321 return -EIO; 322 323 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 324 if (error) 325 return error; 326 327 xfs_ilock(ip, XFS_ILOCK_EXCL); 328 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 329 330 ip->i_d.di_dmevmask = evmask; 331 ip->i_d.di_dmstate = state; 332 333 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 334 error = xfs_trans_commit(tp); 335 336 return error; 337 } 338 339 STATIC int 340 xfs_fssetdm_by_handle( 341 struct file *parfilp, 342 void __user *arg) 343 { 344 int error; 345 struct fsdmidata fsd; 346 xfs_fsop_setdm_handlereq_t dmhreq; 347 struct dentry *dentry; 348 349 if (!capable(CAP_MKNOD)) 350 return -EPERM; 351 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) 352 return -EFAULT; 353 354 error = mnt_want_write_file(parfilp); 355 if (error) 356 return error; 357 358 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); 359 if (IS_ERR(dentry)) { 360 mnt_drop_write_file(parfilp); 361 return PTR_ERR(dentry); 362 } 363 364 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) { 365 error = -EPERM; 366 goto out; 367 } 368 369 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { 370 error = -EFAULT; 371 goto out; 372 } 373 374 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask, 375 fsd.fsd_dmstate); 376 377 out: 378 mnt_drop_write_file(parfilp); 379 dput(dentry); 380 return error; 381 } 382 383 STATIC int 384 xfs_attrlist_by_handle( 385 struct file *parfilp, 386 void __user *arg) 387 { 388 int error = -ENOMEM; 389 attrlist_cursor_kern_t *cursor; 390 xfs_fsop_attrlist_handlereq_t al_hreq; 391 struct dentry *dentry; 392 char *kbuf; 393 394 if (!capable(CAP_SYS_ADMIN)) 395 return -EPERM; 396 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 397 return -EFAULT; 398 if (al_hreq.buflen < sizeof(struct attrlist) || 399 al_hreq.buflen > XFS_XATTR_LIST_MAX) 400 return -EINVAL; 401 402 /* 403 * Reject flags, only allow namespaces. 404 */ 405 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 406 return -EINVAL; 407 408 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 409 if (IS_ERR(dentry)) 410 return PTR_ERR(dentry); 411 412 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); 413 if (!kbuf) 414 goto out_dput; 415 416 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 417 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen, 418 al_hreq.flags, cursor); 419 if (error) 420 goto out_kfree; 421 422 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 423 error = -EFAULT; 424 425 out_kfree: 426 kmem_free(kbuf); 427 out_dput: 428 dput(dentry); 429 return error; 430 } 431 432 int 433 xfs_attrmulti_attr_get( 434 struct inode *inode, 435 unsigned char *name, 436 unsigned char __user *ubuf, 437 __uint32_t *len, 438 __uint32_t flags) 439 { 440 unsigned char *kbuf; 441 int error = -EFAULT; 442 443 if (*len > XFS_XATTR_SIZE_MAX) 444 return -EINVAL; 445 kbuf = kmem_zalloc_large(*len, KM_SLEEP); 446 if (!kbuf) 447 return -ENOMEM; 448 449 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); 450 if (error) 451 goto out_kfree; 452 453 if (copy_to_user(ubuf, kbuf, *len)) 454 error = -EFAULT; 455 456 out_kfree: 457 kmem_free(kbuf); 458 return error; 459 } 460 461 int 462 xfs_attrmulti_attr_set( 463 struct inode *inode, 464 unsigned char *name, 465 const unsigned char __user *ubuf, 466 __uint32_t len, 467 __uint32_t flags) 468 { 469 unsigned char *kbuf; 470 int error; 471 472 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 473 return -EPERM; 474 if (len > XFS_XATTR_SIZE_MAX) 475 return -EINVAL; 476 477 kbuf = memdup_user(ubuf, len); 478 if (IS_ERR(kbuf)) 479 return PTR_ERR(kbuf); 480 481 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 482 if (!error) 483 xfs_forget_acl(inode, name, flags); 484 kfree(kbuf); 485 return error; 486 } 487 488 int 489 xfs_attrmulti_attr_remove( 490 struct inode *inode, 491 unsigned char *name, 492 __uint32_t flags) 493 { 494 int error; 495 496 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 497 return -EPERM; 498 error = xfs_attr_remove(XFS_I(inode), name, flags); 499 if (!error) 500 xfs_forget_acl(inode, name, flags); 501 return error; 502 } 503 504 STATIC int 505 xfs_attrmulti_by_handle( 506 struct file *parfilp, 507 void __user *arg) 508 { 509 int error; 510 xfs_attr_multiop_t *ops; 511 xfs_fsop_attrmulti_handlereq_t am_hreq; 512 struct dentry *dentry; 513 unsigned int i, size; 514 unsigned char *attr_name; 515 516 if (!capable(CAP_SYS_ADMIN)) 517 return -EPERM; 518 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 519 return -EFAULT; 520 521 /* overflow check */ 522 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 523 return -E2BIG; 524 525 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 526 if (IS_ERR(dentry)) 527 return PTR_ERR(dentry); 528 529 error = -E2BIG; 530 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 531 if (!size || size > 16 * PAGE_SIZE) 532 goto out_dput; 533 534 ops = memdup_user(am_hreq.ops, size); 535 if (IS_ERR(ops)) { 536 error = PTR_ERR(ops); 537 goto out_dput; 538 } 539 540 error = -ENOMEM; 541 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 542 if (!attr_name) 543 goto out_kfree_ops; 544 545 error = 0; 546 for (i = 0; i < am_hreq.opcount; i++) { 547 ops[i].am_error = strncpy_from_user((char *)attr_name, 548 ops[i].am_attrname, MAXNAMELEN); 549 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 550 error = -ERANGE; 551 if (ops[i].am_error < 0) 552 break; 553 554 switch (ops[i].am_opcode) { 555 case ATTR_OP_GET: 556 ops[i].am_error = xfs_attrmulti_attr_get( 557 d_inode(dentry), attr_name, 558 ops[i].am_attrvalue, &ops[i].am_length, 559 ops[i].am_flags); 560 break; 561 case ATTR_OP_SET: 562 ops[i].am_error = mnt_want_write_file(parfilp); 563 if (ops[i].am_error) 564 break; 565 ops[i].am_error = xfs_attrmulti_attr_set( 566 d_inode(dentry), attr_name, 567 ops[i].am_attrvalue, ops[i].am_length, 568 ops[i].am_flags); 569 mnt_drop_write_file(parfilp); 570 break; 571 case ATTR_OP_REMOVE: 572 ops[i].am_error = mnt_want_write_file(parfilp); 573 if (ops[i].am_error) 574 break; 575 ops[i].am_error = xfs_attrmulti_attr_remove( 576 d_inode(dentry), attr_name, 577 ops[i].am_flags); 578 mnt_drop_write_file(parfilp); 579 break; 580 default: 581 ops[i].am_error = -EINVAL; 582 } 583 } 584 585 if (copy_to_user(am_hreq.ops, ops, size)) 586 error = -EFAULT; 587 588 kfree(attr_name); 589 out_kfree_ops: 590 kfree(ops); 591 out_dput: 592 dput(dentry); 593 return error; 594 } 595 596 int 597 xfs_ioc_space( 598 struct xfs_inode *ip, 599 struct inode *inode, 600 struct file *filp, 601 int ioflags, 602 unsigned int cmd, 603 xfs_flock64_t *bf) 604 { 605 struct iattr iattr; 606 enum xfs_prealloc_flags flags = 0; 607 uint iolock = XFS_IOLOCK_EXCL; 608 int error; 609 610 /* 611 * Only allow the sys admin to reserve space unless 612 * unwritten extents are enabled. 613 */ 614 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && 615 !capable(CAP_SYS_ADMIN)) 616 return -EPERM; 617 618 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 619 return -EPERM; 620 621 if (!(filp->f_mode & FMODE_WRITE)) 622 return -EBADF; 623 624 if (!S_ISREG(inode->i_mode)) 625 return -EINVAL; 626 627 if (filp->f_flags & O_DSYNC) 628 flags |= XFS_PREALLOC_SYNC; 629 if (ioflags & XFS_IO_INVIS) 630 flags |= XFS_PREALLOC_INVISIBLE; 631 632 error = mnt_want_write_file(filp); 633 if (error) 634 return error; 635 636 xfs_ilock(ip, iolock); 637 error = xfs_break_layouts(inode, &iolock, false); 638 if (error) 639 goto out_unlock; 640 641 xfs_ilock(ip, XFS_MMAPLOCK_EXCL); 642 iolock |= XFS_MMAPLOCK_EXCL; 643 644 switch (bf->l_whence) { 645 case 0: /*SEEK_SET*/ 646 break; 647 case 1: /*SEEK_CUR*/ 648 bf->l_start += filp->f_pos; 649 break; 650 case 2: /*SEEK_END*/ 651 bf->l_start += XFS_ISIZE(ip); 652 break; 653 default: 654 error = -EINVAL; 655 goto out_unlock; 656 } 657 658 /* 659 * length of <= 0 for resv/unresv/zero is invalid. length for 660 * alloc/free is ignored completely and we have no idea what userspace 661 * might have set it to, so set it to zero to allow range 662 * checks to pass. 663 */ 664 switch (cmd) { 665 case XFS_IOC_ZERO_RANGE: 666 case XFS_IOC_RESVSP: 667 case XFS_IOC_RESVSP64: 668 case XFS_IOC_UNRESVSP: 669 case XFS_IOC_UNRESVSP64: 670 if (bf->l_len <= 0) { 671 error = -EINVAL; 672 goto out_unlock; 673 } 674 break; 675 default: 676 bf->l_len = 0; 677 break; 678 } 679 680 if (bf->l_start < 0 || 681 bf->l_start > inode->i_sb->s_maxbytes || 682 bf->l_start + bf->l_len < 0 || 683 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) { 684 error = -EINVAL; 685 goto out_unlock; 686 } 687 688 switch (cmd) { 689 case XFS_IOC_ZERO_RANGE: 690 flags |= XFS_PREALLOC_SET; 691 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); 692 break; 693 case XFS_IOC_RESVSP: 694 case XFS_IOC_RESVSP64: 695 flags |= XFS_PREALLOC_SET; 696 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, 697 XFS_BMAPI_PREALLOC); 698 break; 699 case XFS_IOC_UNRESVSP: 700 case XFS_IOC_UNRESVSP64: 701 error = xfs_free_file_space(ip, bf->l_start, bf->l_len); 702 break; 703 case XFS_IOC_ALLOCSP: 704 case XFS_IOC_ALLOCSP64: 705 case XFS_IOC_FREESP: 706 case XFS_IOC_FREESP64: 707 flags |= XFS_PREALLOC_CLEAR; 708 if (bf->l_start > XFS_ISIZE(ip)) { 709 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 710 bf->l_start - XFS_ISIZE(ip), 0); 711 if (error) 712 goto out_unlock; 713 } 714 715 iattr.ia_valid = ATTR_SIZE; 716 iattr.ia_size = bf->l_start; 717 718 error = xfs_setattr_size(ip, &iattr); 719 break; 720 default: 721 ASSERT(0); 722 error = -EINVAL; 723 } 724 725 if (error) 726 goto out_unlock; 727 728 error = xfs_update_prealloc_flags(ip, flags); 729 730 out_unlock: 731 xfs_iunlock(ip, iolock); 732 mnt_drop_write_file(filp); 733 return error; 734 } 735 736 STATIC int 737 xfs_ioc_bulkstat( 738 xfs_mount_t *mp, 739 unsigned int cmd, 740 void __user *arg) 741 { 742 xfs_fsop_bulkreq_t bulkreq; 743 int count; /* # of records returned */ 744 xfs_ino_t inlast; /* last inode number */ 745 int done; 746 int error; 747 748 /* done = 1 if there are more stats to get and if bulkstat */ 749 /* should be called again (unused here, but used in dmapi) */ 750 751 if (!capable(CAP_SYS_ADMIN)) 752 return -EPERM; 753 754 if (XFS_FORCED_SHUTDOWN(mp)) 755 return -EIO; 756 757 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) 758 return -EFAULT; 759 760 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) 761 return -EFAULT; 762 763 if ((count = bulkreq.icount) <= 0) 764 return -EINVAL; 765 766 if (bulkreq.ubuffer == NULL) 767 return -EINVAL; 768 769 if (cmd == XFS_IOC_FSINUMBERS) 770 error = xfs_inumbers(mp, &inlast, &count, 771 bulkreq.ubuffer, xfs_inumbers_fmt); 772 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) 773 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer, 774 sizeof(xfs_bstat_t), NULL, &done); 775 else /* XFS_IOC_FSBULKSTAT */ 776 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, 777 sizeof(xfs_bstat_t), bulkreq.ubuffer, 778 &done); 779 780 if (error) 781 return error; 782 783 if (bulkreq.ocount != NULL) { 784 if (copy_to_user(bulkreq.lastip, &inlast, 785 sizeof(xfs_ino_t))) 786 return -EFAULT; 787 788 if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) 789 return -EFAULT; 790 } 791 792 return 0; 793 } 794 795 STATIC int 796 xfs_ioc_fsgeometry_v1( 797 xfs_mount_t *mp, 798 void __user *arg) 799 { 800 xfs_fsop_geom_t fsgeo; 801 int error; 802 803 error = xfs_fs_geometry(mp, &fsgeo, 3); 804 if (error) 805 return error; 806 807 /* 808 * Caller should have passed an argument of type 809 * xfs_fsop_geom_v1_t. This is a proper subset of the 810 * xfs_fsop_geom_t that xfs_fs_geometry() fills in. 811 */ 812 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) 813 return -EFAULT; 814 return 0; 815 } 816 817 STATIC int 818 xfs_ioc_fsgeometry( 819 xfs_mount_t *mp, 820 void __user *arg) 821 { 822 xfs_fsop_geom_t fsgeo; 823 int error; 824 825 error = xfs_fs_geometry(mp, &fsgeo, 4); 826 if (error) 827 return error; 828 829 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) 830 return -EFAULT; 831 return 0; 832 } 833 834 /* 835 * Linux extended inode flags interface. 836 */ 837 838 STATIC unsigned int 839 xfs_merge_ioc_xflags( 840 unsigned int flags, 841 unsigned int start) 842 { 843 unsigned int xflags = start; 844 845 if (flags & FS_IMMUTABLE_FL) 846 xflags |= FS_XFLAG_IMMUTABLE; 847 else 848 xflags &= ~FS_XFLAG_IMMUTABLE; 849 if (flags & FS_APPEND_FL) 850 xflags |= FS_XFLAG_APPEND; 851 else 852 xflags &= ~FS_XFLAG_APPEND; 853 if (flags & FS_SYNC_FL) 854 xflags |= FS_XFLAG_SYNC; 855 else 856 xflags &= ~FS_XFLAG_SYNC; 857 if (flags & FS_NOATIME_FL) 858 xflags |= FS_XFLAG_NOATIME; 859 else 860 xflags &= ~FS_XFLAG_NOATIME; 861 if (flags & FS_NODUMP_FL) 862 xflags |= FS_XFLAG_NODUMP; 863 else 864 xflags &= ~FS_XFLAG_NODUMP; 865 866 return xflags; 867 } 868 869 STATIC unsigned int 870 xfs_di2lxflags( 871 __uint16_t di_flags) 872 { 873 unsigned int flags = 0; 874 875 if (di_flags & XFS_DIFLAG_IMMUTABLE) 876 flags |= FS_IMMUTABLE_FL; 877 if (di_flags & XFS_DIFLAG_APPEND) 878 flags |= FS_APPEND_FL; 879 if (di_flags & XFS_DIFLAG_SYNC) 880 flags |= FS_SYNC_FL; 881 if (di_flags & XFS_DIFLAG_NOATIME) 882 flags |= FS_NOATIME_FL; 883 if (di_flags & XFS_DIFLAG_NODUMP) 884 flags |= FS_NODUMP_FL; 885 return flags; 886 } 887 888 STATIC int 889 xfs_ioc_fsgetxattr( 890 xfs_inode_t *ip, 891 int attr, 892 void __user *arg) 893 { 894 struct fsxattr fa; 895 896 memset(&fa, 0, sizeof(struct fsxattr)); 897 898 xfs_ilock(ip, XFS_ILOCK_SHARED); 899 fa.fsx_xflags = xfs_ip2xflags(ip); 900 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 901 fa.fsx_projid = xfs_get_projid(ip); 902 903 if (attr) { 904 if (ip->i_afp) { 905 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 906 fa.fsx_nextents = ip->i_afp->if_bytes / 907 sizeof(xfs_bmbt_rec_t); 908 else 909 fa.fsx_nextents = ip->i_d.di_anextents; 910 } else 911 fa.fsx_nextents = 0; 912 } else { 913 if (ip->i_df.if_flags & XFS_IFEXTENTS) 914 fa.fsx_nextents = ip->i_df.if_bytes / 915 sizeof(xfs_bmbt_rec_t); 916 else 917 fa.fsx_nextents = ip->i_d.di_nextents; 918 } 919 xfs_iunlock(ip, XFS_ILOCK_SHARED); 920 921 if (copy_to_user(arg, &fa, sizeof(fa))) 922 return -EFAULT; 923 return 0; 924 } 925 926 STATIC void 927 xfs_set_diflags( 928 struct xfs_inode *ip, 929 unsigned int xflags) 930 { 931 unsigned int di_flags; 932 uint64_t di_flags2; 933 934 /* can't set PREALLOC this way, just preserve it */ 935 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 936 if (xflags & FS_XFLAG_IMMUTABLE) 937 di_flags |= XFS_DIFLAG_IMMUTABLE; 938 if (xflags & FS_XFLAG_APPEND) 939 di_flags |= XFS_DIFLAG_APPEND; 940 if (xflags & FS_XFLAG_SYNC) 941 di_flags |= XFS_DIFLAG_SYNC; 942 if (xflags & FS_XFLAG_NOATIME) 943 di_flags |= XFS_DIFLAG_NOATIME; 944 if (xflags & FS_XFLAG_NODUMP) 945 di_flags |= XFS_DIFLAG_NODUMP; 946 if (xflags & FS_XFLAG_NODEFRAG) 947 di_flags |= XFS_DIFLAG_NODEFRAG; 948 if (xflags & FS_XFLAG_FILESTREAM) 949 di_flags |= XFS_DIFLAG_FILESTREAM; 950 if (S_ISDIR(VFS_I(ip)->i_mode)) { 951 if (xflags & FS_XFLAG_RTINHERIT) 952 di_flags |= XFS_DIFLAG_RTINHERIT; 953 if (xflags & FS_XFLAG_NOSYMLINKS) 954 di_flags |= XFS_DIFLAG_NOSYMLINKS; 955 if (xflags & FS_XFLAG_EXTSZINHERIT) 956 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 957 if (xflags & FS_XFLAG_PROJINHERIT) 958 di_flags |= XFS_DIFLAG_PROJINHERIT; 959 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 960 if (xflags & FS_XFLAG_REALTIME) 961 di_flags |= XFS_DIFLAG_REALTIME; 962 if (xflags & FS_XFLAG_EXTSIZE) 963 di_flags |= XFS_DIFLAG_EXTSIZE; 964 } 965 ip->i_d.di_flags = di_flags; 966 967 /* diflags2 only valid for v3 inodes. */ 968 if (ip->i_d.di_version < 3) 969 return; 970 971 di_flags2 = 0; 972 if (xflags & FS_XFLAG_DAX) 973 di_flags2 |= XFS_DIFLAG2_DAX; 974 975 ip->i_d.di_flags2 = di_flags2; 976 977 } 978 979 STATIC void 980 xfs_diflags_to_linux( 981 struct xfs_inode *ip) 982 { 983 struct inode *inode = VFS_I(ip); 984 unsigned int xflags = xfs_ip2xflags(ip); 985 986 if (xflags & FS_XFLAG_IMMUTABLE) 987 inode->i_flags |= S_IMMUTABLE; 988 else 989 inode->i_flags &= ~S_IMMUTABLE; 990 if (xflags & FS_XFLAG_APPEND) 991 inode->i_flags |= S_APPEND; 992 else 993 inode->i_flags &= ~S_APPEND; 994 if (xflags & FS_XFLAG_SYNC) 995 inode->i_flags |= S_SYNC; 996 else 997 inode->i_flags &= ~S_SYNC; 998 if (xflags & FS_XFLAG_NOATIME) 999 inode->i_flags |= S_NOATIME; 1000 else 1001 inode->i_flags &= ~S_NOATIME; 1002 if (xflags & FS_XFLAG_DAX) 1003 inode->i_flags |= S_DAX; 1004 else 1005 inode->i_flags &= ~S_DAX; 1006 1007 } 1008 1009 static int 1010 xfs_ioctl_setattr_xflags( 1011 struct xfs_trans *tp, 1012 struct xfs_inode *ip, 1013 struct fsxattr *fa) 1014 { 1015 struct xfs_mount *mp = ip->i_mount; 1016 1017 /* Can't change realtime flag if any extents are allocated. */ 1018 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1019 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1020 return -EINVAL; 1021 1022 /* If realtime flag is set then must have realtime device */ 1023 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1024 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1025 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1026 return -EINVAL; 1027 } 1028 1029 /* 1030 * Can't modify an immutable/append-only file unless 1031 * we have appropriate permission. 1032 */ 1033 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) || 1034 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) && 1035 !capable(CAP_LINUX_IMMUTABLE)) 1036 return -EPERM; 1037 1038 xfs_set_diflags(ip, fa->fsx_xflags); 1039 xfs_diflags_to_linux(ip); 1040 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1041 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1042 XFS_STATS_INC(mp, xs_ig_attrchg); 1043 return 0; 1044 } 1045 1046 /* 1047 * If we are changing DAX flags, we have to ensure the file is clean and any 1048 * cached objects in the address space are invalidated and removed. This 1049 * requires us to lock out other IO and page faults similar to a truncate 1050 * operation. The locks need to be held until the transaction has been committed 1051 * so that the cache invalidation is atomic with respect to the DAX flag 1052 * manipulation. 1053 */ 1054 static int 1055 xfs_ioctl_setattr_dax_invalidate( 1056 struct xfs_inode *ip, 1057 struct fsxattr *fa, 1058 int *join_flags) 1059 { 1060 struct inode *inode = VFS_I(ip); 1061 int error; 1062 1063 *join_flags = 0; 1064 1065 /* 1066 * It is only valid to set the DAX flag on regular files and 1067 * directories on filesystems where the block size is equal to the page 1068 * size. On directories it serves as an inherit hint. 1069 */ 1070 if (fa->fsx_xflags & FS_XFLAG_DAX) { 1071 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) 1072 return -EINVAL; 1073 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE) 1074 return -EINVAL; 1075 } 1076 1077 /* If the DAX state is not changing, we have nothing to do here. */ 1078 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode)) 1079 return 0; 1080 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode)) 1081 return 0; 1082 1083 /* lock, flush and invalidate mapping in preparation for flag change */ 1084 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1085 error = filemap_write_and_wait(inode->i_mapping); 1086 if (error) 1087 goto out_unlock; 1088 error = invalidate_inode_pages2(inode->i_mapping); 1089 if (error) 1090 goto out_unlock; 1091 1092 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL; 1093 return 0; 1094 1095 out_unlock: 1096 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1097 return error; 1098 1099 } 1100 1101 /* 1102 * Set up the transaction structure for the setattr operation, checking that we 1103 * have permission to do so. On success, return a clean transaction and the 1104 * inode locked exclusively ready for further operation specific checks. On 1105 * failure, return an error without modifying or locking the inode. 1106 * 1107 * The inode might already be IO locked on call. If this is the case, it is 1108 * indicated in @join_flags and we take full responsibility for ensuring they 1109 * are unlocked from now on. Hence if we have an error here, we still have to 1110 * unlock them. Otherwise, once they are joined to the transaction, they will 1111 * be unlocked on commit/cancel. 1112 */ 1113 static struct xfs_trans * 1114 xfs_ioctl_setattr_get_trans( 1115 struct xfs_inode *ip, 1116 int join_flags) 1117 { 1118 struct xfs_mount *mp = ip->i_mount; 1119 struct xfs_trans *tp; 1120 int error = -EROFS; 1121 1122 if (mp->m_flags & XFS_MOUNT_RDONLY) 1123 goto out_unlock; 1124 error = -EIO; 1125 if (XFS_FORCED_SHUTDOWN(mp)) 1126 goto out_unlock; 1127 1128 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1129 if (error) 1130 return ERR_PTR(error); 1131 1132 xfs_ilock(ip, XFS_ILOCK_EXCL); 1133 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags); 1134 join_flags = 0; 1135 1136 /* 1137 * CAP_FOWNER overrides the following restrictions: 1138 * 1139 * The user ID of the calling process must be equal to the file owner 1140 * ID, except in cases where the CAP_FSETID capability is applicable. 1141 */ 1142 if (!inode_owner_or_capable(VFS_I(ip))) { 1143 error = -EPERM; 1144 goto out_cancel; 1145 } 1146 1147 if (mp->m_flags & XFS_MOUNT_WSYNC) 1148 xfs_trans_set_sync(tp); 1149 1150 return tp; 1151 1152 out_cancel: 1153 xfs_trans_cancel(tp); 1154 out_unlock: 1155 if (join_flags) 1156 xfs_iunlock(ip, join_flags); 1157 return ERR_PTR(error); 1158 } 1159 1160 /* 1161 * extent size hint validation is somewhat cumbersome. Rules are: 1162 * 1163 * 1. extent size hint is only valid for directories and regular files 1164 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1165 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1166 * 4. can only be changed on regular files if no extents are allocated 1167 * 5. can be changed on directories at any time 1168 * 6. extsize hint of 0 turns off hints, clears inode flags. 1169 * 7. Extent size must be a multiple of the appropriate block size. 1170 * 8. for non-realtime files, the extent size hint must be limited 1171 * to half the AG size to avoid alignment extending the extent beyond the 1172 * limits of the AG. 1173 */ 1174 static int 1175 xfs_ioctl_setattr_check_extsize( 1176 struct xfs_inode *ip, 1177 struct fsxattr *fa) 1178 { 1179 struct xfs_mount *mp = ip->i_mount; 1180 1181 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode)) 1182 return -EINVAL; 1183 1184 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) && 1185 !S_ISDIR(VFS_I(ip)->i_mode)) 1186 return -EINVAL; 1187 1188 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents && 1189 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1190 return -EINVAL; 1191 1192 if (fa->fsx_extsize != 0) { 1193 xfs_extlen_t size; 1194 xfs_fsblock_t extsize_fsb; 1195 1196 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1197 if (extsize_fsb > MAXEXTLEN) 1198 return -EINVAL; 1199 1200 if (XFS_IS_REALTIME_INODE(ip) || 1201 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1202 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1203 } else { 1204 size = mp->m_sb.sb_blocksize; 1205 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1206 return -EINVAL; 1207 } 1208 1209 if (fa->fsx_extsize % size) 1210 return -EINVAL; 1211 } else 1212 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT); 1213 1214 return 0; 1215 } 1216 1217 static int 1218 xfs_ioctl_setattr_check_projid( 1219 struct xfs_inode *ip, 1220 struct fsxattr *fa) 1221 { 1222 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1223 if (fa->fsx_projid > (__uint16_t)-1 && 1224 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1225 return -EINVAL; 1226 1227 /* 1228 * Project Quota ID state is only allowed to change from within the init 1229 * namespace. Enforce that restriction only if we are trying to change 1230 * the quota ID state. Everything else is allowed in user namespaces. 1231 */ 1232 if (current_user_ns() == &init_user_ns) 1233 return 0; 1234 1235 if (xfs_get_projid(ip) != fa->fsx_projid) 1236 return -EINVAL; 1237 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) != 1238 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)) 1239 return -EINVAL; 1240 1241 return 0; 1242 } 1243 1244 STATIC int 1245 xfs_ioctl_setattr( 1246 xfs_inode_t *ip, 1247 struct fsxattr *fa) 1248 { 1249 struct xfs_mount *mp = ip->i_mount; 1250 struct xfs_trans *tp; 1251 struct xfs_dquot *udqp = NULL; 1252 struct xfs_dquot *pdqp = NULL; 1253 struct xfs_dquot *olddquot = NULL; 1254 int code; 1255 int join_flags = 0; 1256 1257 trace_xfs_ioctl_setattr(ip); 1258 1259 code = xfs_ioctl_setattr_check_projid(ip, fa); 1260 if (code) 1261 return code; 1262 1263 /* 1264 * If disk quotas is on, we make sure that the dquots do exist on disk, 1265 * before we start any other transactions. Trying to do this later 1266 * is messy. We don't care to take a readlock to look at the ids 1267 * in inode here, because we can't hold it across the trans_reserve. 1268 * If the IDs do change before we take the ilock, we're covered 1269 * because the i_*dquot fields will get updated anyway. 1270 */ 1271 if (XFS_IS_QUOTA_ON(mp)) { 1272 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1273 ip->i_d.di_gid, fa->fsx_projid, 1274 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1275 if (code) 1276 return code; 1277 } 1278 1279 /* 1280 * Changing DAX config may require inode locking for mapping 1281 * invalidation. These need to be held all the way to transaction commit 1282 * or cancel time, so need to be passed through to 1283 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1284 * appropriately. 1285 */ 1286 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags); 1287 if (code) 1288 goto error_free_dquots; 1289 1290 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1291 if (IS_ERR(tp)) { 1292 code = PTR_ERR(tp); 1293 goto error_free_dquots; 1294 } 1295 1296 1297 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1298 xfs_get_projid(ip) != fa->fsx_projid) { 1299 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1300 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1301 if (code) /* out of quota */ 1302 goto error_trans_cancel; 1303 } 1304 1305 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1306 if (code) 1307 goto error_trans_cancel; 1308 1309 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1310 if (code) 1311 goto error_trans_cancel; 1312 1313 /* 1314 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1315 * overrides the following restrictions: 1316 * 1317 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1318 * successful return from chown() 1319 */ 1320 1321 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1322 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1323 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1324 1325 /* Change the ownerships and register project quota modifications */ 1326 if (xfs_get_projid(ip) != fa->fsx_projid) { 1327 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1328 olddquot = xfs_qm_vop_chown(tp, ip, 1329 &ip->i_pdquot, pdqp); 1330 } 1331 ASSERT(ip->i_d.di_version > 1); 1332 xfs_set_projid(ip, fa->fsx_projid); 1333 } 1334 1335 /* 1336 * Only set the extent size hint if we've already determined that the 1337 * extent size hint should be set on the inode. If no extent size flags 1338 * are set on the inode then unconditionally clear the extent size hint. 1339 */ 1340 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1341 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1342 else 1343 ip->i_d.di_extsize = 0; 1344 1345 code = xfs_trans_commit(tp); 1346 1347 /* 1348 * Release any dquot(s) the inode had kept before chown. 1349 */ 1350 xfs_qm_dqrele(olddquot); 1351 xfs_qm_dqrele(udqp); 1352 xfs_qm_dqrele(pdqp); 1353 1354 return code; 1355 1356 error_trans_cancel: 1357 xfs_trans_cancel(tp); 1358 error_free_dquots: 1359 xfs_qm_dqrele(udqp); 1360 xfs_qm_dqrele(pdqp); 1361 return code; 1362 } 1363 1364 STATIC int 1365 xfs_ioc_fssetxattr( 1366 xfs_inode_t *ip, 1367 struct file *filp, 1368 void __user *arg) 1369 { 1370 struct fsxattr fa; 1371 int error; 1372 1373 if (copy_from_user(&fa, arg, sizeof(fa))) 1374 return -EFAULT; 1375 1376 error = mnt_want_write_file(filp); 1377 if (error) 1378 return error; 1379 error = xfs_ioctl_setattr(ip, &fa); 1380 mnt_drop_write_file(filp); 1381 return error; 1382 } 1383 1384 STATIC int 1385 xfs_ioc_getxflags( 1386 xfs_inode_t *ip, 1387 void __user *arg) 1388 { 1389 unsigned int flags; 1390 1391 flags = xfs_di2lxflags(ip->i_d.di_flags); 1392 if (copy_to_user(arg, &flags, sizeof(flags))) 1393 return -EFAULT; 1394 return 0; 1395 } 1396 1397 STATIC int 1398 xfs_ioc_setxflags( 1399 struct xfs_inode *ip, 1400 struct file *filp, 1401 void __user *arg) 1402 { 1403 struct xfs_trans *tp; 1404 struct fsxattr fa; 1405 unsigned int flags; 1406 int join_flags = 0; 1407 int error; 1408 1409 if (copy_from_user(&flags, arg, sizeof(flags))) 1410 return -EFAULT; 1411 1412 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1413 FS_NOATIME_FL | FS_NODUMP_FL | \ 1414 FS_SYNC_FL)) 1415 return -EOPNOTSUPP; 1416 1417 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1418 1419 error = mnt_want_write_file(filp); 1420 if (error) 1421 return error; 1422 1423 /* 1424 * Changing DAX config may require inode locking for mapping 1425 * invalidation. These need to be held all the way to transaction commit 1426 * or cancel time, so need to be passed through to 1427 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1428 * appropriately. 1429 */ 1430 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags); 1431 if (error) 1432 goto out_drop_write; 1433 1434 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1435 if (IS_ERR(tp)) { 1436 error = PTR_ERR(tp); 1437 goto out_drop_write; 1438 } 1439 1440 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1441 if (error) { 1442 xfs_trans_cancel(tp); 1443 goto out_drop_write; 1444 } 1445 1446 error = xfs_trans_commit(tp); 1447 out_drop_write: 1448 mnt_drop_write_file(filp); 1449 return error; 1450 } 1451 1452 STATIC int 1453 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) 1454 { 1455 struct getbmap __user *base = (struct getbmap __user *)*ap; 1456 1457 /* copy only getbmap portion (not getbmapx) */ 1458 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1459 return -EFAULT; 1460 1461 *ap += sizeof(struct getbmap); 1462 return 0; 1463 } 1464 1465 STATIC int 1466 xfs_ioc_getbmap( 1467 struct xfs_inode *ip, 1468 int ioflags, 1469 unsigned int cmd, 1470 void __user *arg) 1471 { 1472 struct getbmapx bmx; 1473 int error; 1474 1475 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) 1476 return -EFAULT; 1477 1478 if (bmx.bmv_count < 2) 1479 return -EINVAL; 1480 1481 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1482 if (ioflags & XFS_IO_INVIS) 1483 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1484 1485 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, 1486 (__force struct getbmap *)arg+1); 1487 if (error) 1488 return error; 1489 1490 /* copy back header - only size of getbmap */ 1491 if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) 1492 return -EFAULT; 1493 return 0; 1494 } 1495 1496 STATIC int 1497 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) 1498 { 1499 struct getbmapx __user *base = (struct getbmapx __user *)*ap; 1500 1501 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1502 return -EFAULT; 1503 1504 *ap += sizeof(struct getbmapx); 1505 return 0; 1506 } 1507 1508 STATIC int 1509 xfs_ioc_getbmapx( 1510 struct xfs_inode *ip, 1511 void __user *arg) 1512 { 1513 struct getbmapx bmx; 1514 int error; 1515 1516 if (copy_from_user(&bmx, arg, sizeof(bmx))) 1517 return -EFAULT; 1518 1519 if (bmx.bmv_count < 2) 1520 return -EINVAL; 1521 1522 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1523 return -EINVAL; 1524 1525 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1526 (__force struct getbmapx *)arg+1); 1527 if (error) 1528 return error; 1529 1530 /* copy back header */ 1531 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) 1532 return -EFAULT; 1533 1534 return 0; 1535 } 1536 1537 int 1538 xfs_ioc_swapext( 1539 xfs_swapext_t *sxp) 1540 { 1541 xfs_inode_t *ip, *tip; 1542 struct fd f, tmp; 1543 int error = 0; 1544 1545 /* Pull information for the target fd */ 1546 f = fdget((int)sxp->sx_fdtarget); 1547 if (!f.file) { 1548 error = -EINVAL; 1549 goto out; 1550 } 1551 1552 if (!(f.file->f_mode & FMODE_WRITE) || 1553 !(f.file->f_mode & FMODE_READ) || 1554 (f.file->f_flags & O_APPEND)) { 1555 error = -EBADF; 1556 goto out_put_file; 1557 } 1558 1559 tmp = fdget((int)sxp->sx_fdtmp); 1560 if (!tmp.file) { 1561 error = -EINVAL; 1562 goto out_put_file; 1563 } 1564 1565 if (!(tmp.file->f_mode & FMODE_WRITE) || 1566 !(tmp.file->f_mode & FMODE_READ) || 1567 (tmp.file->f_flags & O_APPEND)) { 1568 error = -EBADF; 1569 goto out_put_tmp_file; 1570 } 1571 1572 if (IS_SWAPFILE(file_inode(f.file)) || 1573 IS_SWAPFILE(file_inode(tmp.file))) { 1574 error = -EINVAL; 1575 goto out_put_tmp_file; 1576 } 1577 1578 ip = XFS_I(file_inode(f.file)); 1579 tip = XFS_I(file_inode(tmp.file)); 1580 1581 if (ip->i_mount != tip->i_mount) { 1582 error = -EINVAL; 1583 goto out_put_tmp_file; 1584 } 1585 1586 if (ip->i_ino == tip->i_ino) { 1587 error = -EINVAL; 1588 goto out_put_tmp_file; 1589 } 1590 1591 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1592 error = -EIO; 1593 goto out_put_tmp_file; 1594 } 1595 1596 error = xfs_swap_extents(ip, tip, sxp); 1597 1598 out_put_tmp_file: 1599 fdput(tmp); 1600 out_put_file: 1601 fdput(f); 1602 out: 1603 return error; 1604 } 1605 1606 /* 1607 * Note: some of the ioctl's return positive numbers as a 1608 * byte count indicating success, such as readlink_by_handle. 1609 * So we don't "sign flip" like most other routines. This means 1610 * true errors need to be returned as a negative value. 1611 */ 1612 long 1613 xfs_file_ioctl( 1614 struct file *filp, 1615 unsigned int cmd, 1616 unsigned long p) 1617 { 1618 struct inode *inode = file_inode(filp); 1619 struct xfs_inode *ip = XFS_I(inode); 1620 struct xfs_mount *mp = ip->i_mount; 1621 void __user *arg = (void __user *)p; 1622 int ioflags = 0; 1623 int error; 1624 1625 if (filp->f_mode & FMODE_NOCMTIME) 1626 ioflags |= XFS_IO_INVIS; 1627 1628 trace_xfs_file_ioctl(ip); 1629 1630 switch (cmd) { 1631 case FITRIM: 1632 return xfs_ioc_trim(mp, arg); 1633 case XFS_IOC_ALLOCSP: 1634 case XFS_IOC_FREESP: 1635 case XFS_IOC_RESVSP: 1636 case XFS_IOC_UNRESVSP: 1637 case XFS_IOC_ALLOCSP64: 1638 case XFS_IOC_FREESP64: 1639 case XFS_IOC_RESVSP64: 1640 case XFS_IOC_UNRESVSP64: 1641 case XFS_IOC_ZERO_RANGE: { 1642 xfs_flock64_t bf; 1643 1644 if (copy_from_user(&bf, arg, sizeof(bf))) 1645 return -EFAULT; 1646 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf); 1647 } 1648 case XFS_IOC_DIOINFO: { 1649 struct dioattr da; 1650 xfs_buftarg_t *target = 1651 XFS_IS_REALTIME_INODE(ip) ? 1652 mp->m_rtdev_targp : mp->m_ddev_targp; 1653 1654 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1655 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1656 1657 if (copy_to_user(arg, &da, sizeof(da))) 1658 return -EFAULT; 1659 return 0; 1660 } 1661 1662 case XFS_IOC_FSBULKSTAT_SINGLE: 1663 case XFS_IOC_FSBULKSTAT: 1664 case XFS_IOC_FSINUMBERS: 1665 return xfs_ioc_bulkstat(mp, cmd, arg); 1666 1667 case XFS_IOC_FSGEOMETRY_V1: 1668 return xfs_ioc_fsgeometry_v1(mp, arg); 1669 1670 case XFS_IOC_FSGEOMETRY: 1671 return xfs_ioc_fsgeometry(mp, arg); 1672 1673 case XFS_IOC_GETVERSION: 1674 return put_user(inode->i_generation, (int __user *)arg); 1675 1676 case XFS_IOC_FSGETXATTR: 1677 return xfs_ioc_fsgetxattr(ip, 0, arg); 1678 case XFS_IOC_FSGETXATTRA: 1679 return xfs_ioc_fsgetxattr(ip, 1, arg); 1680 case XFS_IOC_FSSETXATTR: 1681 return xfs_ioc_fssetxattr(ip, filp, arg); 1682 case XFS_IOC_GETXFLAGS: 1683 return xfs_ioc_getxflags(ip, arg); 1684 case XFS_IOC_SETXFLAGS: 1685 return xfs_ioc_setxflags(ip, filp, arg); 1686 1687 case XFS_IOC_FSSETDM: { 1688 struct fsdmidata dmi; 1689 1690 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1691 return -EFAULT; 1692 1693 error = mnt_want_write_file(filp); 1694 if (error) 1695 return error; 1696 1697 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1698 dmi.fsd_dmstate); 1699 mnt_drop_write_file(filp); 1700 return error; 1701 } 1702 1703 case XFS_IOC_GETBMAP: 1704 case XFS_IOC_GETBMAPA: 1705 return xfs_ioc_getbmap(ip, ioflags, cmd, arg); 1706 1707 case XFS_IOC_GETBMAPX: 1708 return xfs_ioc_getbmapx(ip, arg); 1709 1710 case XFS_IOC_FD_TO_HANDLE: 1711 case XFS_IOC_PATH_TO_HANDLE: 1712 case XFS_IOC_PATH_TO_FSHANDLE: { 1713 xfs_fsop_handlereq_t hreq; 1714 1715 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1716 return -EFAULT; 1717 return xfs_find_handle(cmd, &hreq); 1718 } 1719 case XFS_IOC_OPEN_BY_HANDLE: { 1720 xfs_fsop_handlereq_t hreq; 1721 1722 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1723 return -EFAULT; 1724 return xfs_open_by_handle(filp, &hreq); 1725 } 1726 case XFS_IOC_FSSETDM_BY_HANDLE: 1727 return xfs_fssetdm_by_handle(filp, arg); 1728 1729 case XFS_IOC_READLINK_BY_HANDLE: { 1730 xfs_fsop_handlereq_t hreq; 1731 1732 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1733 return -EFAULT; 1734 return xfs_readlink_by_handle(filp, &hreq); 1735 } 1736 case XFS_IOC_ATTRLIST_BY_HANDLE: 1737 return xfs_attrlist_by_handle(filp, arg); 1738 1739 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1740 return xfs_attrmulti_by_handle(filp, arg); 1741 1742 case XFS_IOC_SWAPEXT: { 1743 struct xfs_swapext sxp; 1744 1745 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1746 return -EFAULT; 1747 error = mnt_want_write_file(filp); 1748 if (error) 1749 return error; 1750 error = xfs_ioc_swapext(&sxp); 1751 mnt_drop_write_file(filp); 1752 return error; 1753 } 1754 1755 case XFS_IOC_FSCOUNTS: { 1756 xfs_fsop_counts_t out; 1757 1758 error = xfs_fs_counts(mp, &out); 1759 if (error) 1760 return error; 1761 1762 if (copy_to_user(arg, &out, sizeof(out))) 1763 return -EFAULT; 1764 return 0; 1765 } 1766 1767 case XFS_IOC_SET_RESBLKS: { 1768 xfs_fsop_resblks_t inout; 1769 __uint64_t in; 1770 1771 if (!capable(CAP_SYS_ADMIN)) 1772 return -EPERM; 1773 1774 if (mp->m_flags & XFS_MOUNT_RDONLY) 1775 return -EROFS; 1776 1777 if (copy_from_user(&inout, arg, sizeof(inout))) 1778 return -EFAULT; 1779 1780 error = mnt_want_write_file(filp); 1781 if (error) 1782 return error; 1783 1784 /* input parameter is passed in resblks field of structure */ 1785 in = inout.resblks; 1786 error = xfs_reserve_blocks(mp, &in, &inout); 1787 mnt_drop_write_file(filp); 1788 if (error) 1789 return error; 1790 1791 if (copy_to_user(arg, &inout, sizeof(inout))) 1792 return -EFAULT; 1793 return 0; 1794 } 1795 1796 case XFS_IOC_GET_RESBLKS: { 1797 xfs_fsop_resblks_t out; 1798 1799 if (!capable(CAP_SYS_ADMIN)) 1800 return -EPERM; 1801 1802 error = xfs_reserve_blocks(mp, NULL, &out); 1803 if (error) 1804 return error; 1805 1806 if (copy_to_user(arg, &out, sizeof(out))) 1807 return -EFAULT; 1808 1809 return 0; 1810 } 1811 1812 case XFS_IOC_FSGROWFSDATA: { 1813 xfs_growfs_data_t in; 1814 1815 if (copy_from_user(&in, arg, sizeof(in))) 1816 return -EFAULT; 1817 1818 error = mnt_want_write_file(filp); 1819 if (error) 1820 return error; 1821 error = xfs_growfs_data(mp, &in); 1822 mnt_drop_write_file(filp); 1823 return error; 1824 } 1825 1826 case XFS_IOC_FSGROWFSLOG: { 1827 xfs_growfs_log_t in; 1828 1829 if (copy_from_user(&in, arg, sizeof(in))) 1830 return -EFAULT; 1831 1832 error = mnt_want_write_file(filp); 1833 if (error) 1834 return error; 1835 error = xfs_growfs_log(mp, &in); 1836 mnt_drop_write_file(filp); 1837 return error; 1838 } 1839 1840 case XFS_IOC_FSGROWFSRT: { 1841 xfs_growfs_rt_t in; 1842 1843 if (copy_from_user(&in, arg, sizeof(in))) 1844 return -EFAULT; 1845 1846 error = mnt_want_write_file(filp); 1847 if (error) 1848 return error; 1849 error = xfs_growfs_rt(mp, &in); 1850 mnt_drop_write_file(filp); 1851 return error; 1852 } 1853 1854 case XFS_IOC_GOINGDOWN: { 1855 __uint32_t in; 1856 1857 if (!capable(CAP_SYS_ADMIN)) 1858 return -EPERM; 1859 1860 if (get_user(in, (__uint32_t __user *)arg)) 1861 return -EFAULT; 1862 1863 return xfs_fs_goingdown(mp, in); 1864 } 1865 1866 case XFS_IOC_ERROR_INJECTION: { 1867 xfs_error_injection_t in; 1868 1869 if (!capable(CAP_SYS_ADMIN)) 1870 return -EPERM; 1871 1872 if (copy_from_user(&in, arg, sizeof(in))) 1873 return -EFAULT; 1874 1875 return xfs_errortag_add(in.errtag, mp); 1876 } 1877 1878 case XFS_IOC_ERROR_CLEARALL: 1879 if (!capable(CAP_SYS_ADMIN)) 1880 return -EPERM; 1881 1882 return xfs_errortag_clearall(mp, 1); 1883 1884 case XFS_IOC_FREE_EOFBLOCKS: { 1885 struct xfs_fs_eofblocks eofb; 1886 struct xfs_eofblocks keofb; 1887 1888 if (!capable(CAP_SYS_ADMIN)) 1889 return -EPERM; 1890 1891 if (mp->m_flags & XFS_MOUNT_RDONLY) 1892 return -EROFS; 1893 1894 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1895 return -EFAULT; 1896 1897 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 1898 if (error) 1899 return error; 1900 1901 return xfs_icache_free_eofblocks(mp, &keofb); 1902 } 1903 1904 default: 1905 return -ENOTTY; 1906 } 1907 } 1908