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 = -EPERM; 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_is_symlink(dentry)) { 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 = vfs_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 struct xfs_fsop_attrlist_handlereq __user *p = arg; 391 xfs_fsop_attrlist_handlereq_t al_hreq; 392 struct dentry *dentry; 393 char *kbuf; 394 395 if (!capable(CAP_SYS_ADMIN)) 396 return -EPERM; 397 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 398 return -EFAULT; 399 if (al_hreq.buflen < sizeof(struct attrlist) || 400 al_hreq.buflen > XFS_XATTR_LIST_MAX) 401 return -EINVAL; 402 403 /* 404 * Reject flags, only allow namespaces. 405 */ 406 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 407 return -EINVAL; 408 409 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 410 if (IS_ERR(dentry)) 411 return PTR_ERR(dentry); 412 413 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); 414 if (!kbuf) 415 goto out_dput; 416 417 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 418 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen, 419 al_hreq.flags, cursor); 420 if (error) 421 goto out_kfree; 422 423 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) { 424 error = -EFAULT; 425 goto out_kfree; 426 } 427 428 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 429 error = -EFAULT; 430 431 out_kfree: 432 kmem_free(kbuf); 433 out_dput: 434 dput(dentry); 435 return error; 436 } 437 438 int 439 xfs_attrmulti_attr_get( 440 struct inode *inode, 441 unsigned char *name, 442 unsigned char __user *ubuf, 443 __uint32_t *len, 444 __uint32_t flags) 445 { 446 unsigned char *kbuf; 447 int error = -EFAULT; 448 449 if (*len > XFS_XATTR_SIZE_MAX) 450 return -EINVAL; 451 kbuf = kmem_zalloc_large(*len, KM_SLEEP); 452 if (!kbuf) 453 return -ENOMEM; 454 455 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); 456 if (error) 457 goto out_kfree; 458 459 if (copy_to_user(ubuf, kbuf, *len)) 460 error = -EFAULT; 461 462 out_kfree: 463 kmem_free(kbuf); 464 return error; 465 } 466 467 int 468 xfs_attrmulti_attr_set( 469 struct inode *inode, 470 unsigned char *name, 471 const unsigned char __user *ubuf, 472 __uint32_t len, 473 __uint32_t flags) 474 { 475 unsigned char *kbuf; 476 int error; 477 478 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 479 return -EPERM; 480 if (len > XFS_XATTR_SIZE_MAX) 481 return -EINVAL; 482 483 kbuf = memdup_user(ubuf, len); 484 if (IS_ERR(kbuf)) 485 return PTR_ERR(kbuf); 486 487 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 488 if (!error) 489 xfs_forget_acl(inode, name, flags); 490 kfree(kbuf); 491 return error; 492 } 493 494 int 495 xfs_attrmulti_attr_remove( 496 struct inode *inode, 497 unsigned char *name, 498 __uint32_t flags) 499 { 500 int error; 501 502 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 503 return -EPERM; 504 error = xfs_attr_remove(XFS_I(inode), name, flags); 505 if (!error) 506 xfs_forget_acl(inode, name, flags); 507 return error; 508 } 509 510 STATIC int 511 xfs_attrmulti_by_handle( 512 struct file *parfilp, 513 void __user *arg) 514 { 515 int error; 516 xfs_attr_multiop_t *ops; 517 xfs_fsop_attrmulti_handlereq_t am_hreq; 518 struct dentry *dentry; 519 unsigned int i, size; 520 unsigned char *attr_name; 521 522 if (!capable(CAP_SYS_ADMIN)) 523 return -EPERM; 524 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 525 return -EFAULT; 526 527 /* overflow check */ 528 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 529 return -E2BIG; 530 531 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 532 if (IS_ERR(dentry)) 533 return PTR_ERR(dentry); 534 535 error = -E2BIG; 536 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 537 if (!size || size > 16 * PAGE_SIZE) 538 goto out_dput; 539 540 ops = memdup_user(am_hreq.ops, size); 541 if (IS_ERR(ops)) { 542 error = PTR_ERR(ops); 543 goto out_dput; 544 } 545 546 error = -ENOMEM; 547 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 548 if (!attr_name) 549 goto out_kfree_ops; 550 551 error = 0; 552 for (i = 0; i < am_hreq.opcount; i++) { 553 ops[i].am_error = strncpy_from_user((char *)attr_name, 554 ops[i].am_attrname, MAXNAMELEN); 555 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 556 error = -ERANGE; 557 if (ops[i].am_error < 0) 558 break; 559 560 switch (ops[i].am_opcode) { 561 case ATTR_OP_GET: 562 ops[i].am_error = xfs_attrmulti_attr_get( 563 d_inode(dentry), attr_name, 564 ops[i].am_attrvalue, &ops[i].am_length, 565 ops[i].am_flags); 566 break; 567 case ATTR_OP_SET: 568 ops[i].am_error = mnt_want_write_file(parfilp); 569 if (ops[i].am_error) 570 break; 571 ops[i].am_error = xfs_attrmulti_attr_set( 572 d_inode(dentry), attr_name, 573 ops[i].am_attrvalue, ops[i].am_length, 574 ops[i].am_flags); 575 mnt_drop_write_file(parfilp); 576 break; 577 case ATTR_OP_REMOVE: 578 ops[i].am_error = mnt_want_write_file(parfilp); 579 if (ops[i].am_error) 580 break; 581 ops[i].am_error = xfs_attrmulti_attr_remove( 582 d_inode(dentry), attr_name, 583 ops[i].am_flags); 584 mnt_drop_write_file(parfilp); 585 break; 586 default: 587 ops[i].am_error = -EINVAL; 588 } 589 } 590 591 if (copy_to_user(am_hreq.ops, ops, size)) 592 error = -EFAULT; 593 594 kfree(attr_name); 595 out_kfree_ops: 596 kfree(ops); 597 out_dput: 598 dput(dentry); 599 return error; 600 } 601 602 int 603 xfs_ioc_space( 604 struct file *filp, 605 unsigned int cmd, 606 xfs_flock64_t *bf) 607 { 608 struct inode *inode = file_inode(filp); 609 struct xfs_inode *ip = XFS_I(inode); 610 struct iattr iattr; 611 enum xfs_prealloc_flags flags = 0; 612 uint iolock = XFS_IOLOCK_EXCL; 613 int error; 614 615 /* 616 * Only allow the sys admin to reserve space unless 617 * unwritten extents are enabled. 618 */ 619 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && 620 !capable(CAP_SYS_ADMIN)) 621 return -EPERM; 622 623 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) 624 return -EPERM; 625 626 if (!(filp->f_mode & FMODE_WRITE)) 627 return -EBADF; 628 629 if (!S_ISREG(inode->i_mode)) 630 return -EINVAL; 631 632 if (filp->f_flags & O_DSYNC) 633 flags |= XFS_PREALLOC_SYNC; 634 if (filp->f_mode & FMODE_NOCMTIME) 635 flags |= XFS_PREALLOC_INVISIBLE; 636 637 error = mnt_want_write_file(filp); 638 if (error) 639 return error; 640 641 xfs_ilock(ip, iolock); 642 error = xfs_break_layouts(inode, &iolock); 643 if (error) 644 goto out_unlock; 645 646 xfs_ilock(ip, XFS_MMAPLOCK_EXCL); 647 iolock |= XFS_MMAPLOCK_EXCL; 648 649 switch (bf->l_whence) { 650 case 0: /*SEEK_SET*/ 651 break; 652 case 1: /*SEEK_CUR*/ 653 bf->l_start += filp->f_pos; 654 break; 655 case 2: /*SEEK_END*/ 656 bf->l_start += XFS_ISIZE(ip); 657 break; 658 default: 659 error = -EINVAL; 660 goto out_unlock; 661 } 662 663 /* 664 * length of <= 0 for resv/unresv/zero is invalid. length for 665 * alloc/free is ignored completely and we have no idea what userspace 666 * might have set it to, so set it to zero to allow range 667 * checks to pass. 668 */ 669 switch (cmd) { 670 case XFS_IOC_ZERO_RANGE: 671 case XFS_IOC_RESVSP: 672 case XFS_IOC_RESVSP64: 673 case XFS_IOC_UNRESVSP: 674 case XFS_IOC_UNRESVSP64: 675 if (bf->l_len <= 0) { 676 error = -EINVAL; 677 goto out_unlock; 678 } 679 break; 680 default: 681 bf->l_len = 0; 682 break; 683 } 684 685 if (bf->l_start < 0 || 686 bf->l_start > inode->i_sb->s_maxbytes || 687 bf->l_start + bf->l_len < 0 || 688 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) { 689 error = -EINVAL; 690 goto out_unlock; 691 } 692 693 switch (cmd) { 694 case XFS_IOC_ZERO_RANGE: 695 flags |= XFS_PREALLOC_SET; 696 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); 697 break; 698 case XFS_IOC_RESVSP: 699 case XFS_IOC_RESVSP64: 700 flags |= XFS_PREALLOC_SET; 701 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, 702 XFS_BMAPI_PREALLOC); 703 break; 704 case XFS_IOC_UNRESVSP: 705 case XFS_IOC_UNRESVSP64: 706 error = xfs_free_file_space(ip, bf->l_start, bf->l_len); 707 break; 708 case XFS_IOC_ALLOCSP: 709 case XFS_IOC_ALLOCSP64: 710 case XFS_IOC_FREESP: 711 case XFS_IOC_FREESP64: 712 flags |= XFS_PREALLOC_CLEAR; 713 if (bf->l_start > XFS_ISIZE(ip)) { 714 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), 715 bf->l_start - XFS_ISIZE(ip), 0); 716 if (error) 717 goto out_unlock; 718 } 719 720 iattr.ia_valid = ATTR_SIZE; 721 iattr.ia_size = bf->l_start; 722 723 error = xfs_vn_setattr_size(file_dentry(filp), &iattr); 724 break; 725 default: 726 ASSERT(0); 727 error = -EINVAL; 728 } 729 730 if (error) 731 goto out_unlock; 732 733 error = xfs_update_prealloc_flags(ip, flags); 734 735 out_unlock: 736 xfs_iunlock(ip, iolock); 737 mnt_drop_write_file(filp); 738 return error; 739 } 740 741 STATIC int 742 xfs_ioc_bulkstat( 743 xfs_mount_t *mp, 744 unsigned int cmd, 745 void __user *arg) 746 { 747 xfs_fsop_bulkreq_t bulkreq; 748 int count; /* # of records returned */ 749 xfs_ino_t inlast; /* last inode number */ 750 int done; 751 int error; 752 753 /* done = 1 if there are more stats to get and if bulkstat */ 754 /* should be called again (unused here, but used in dmapi) */ 755 756 if (!capable(CAP_SYS_ADMIN)) 757 return -EPERM; 758 759 if (XFS_FORCED_SHUTDOWN(mp)) 760 return -EIO; 761 762 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) 763 return -EFAULT; 764 765 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) 766 return -EFAULT; 767 768 if ((count = bulkreq.icount) <= 0) 769 return -EINVAL; 770 771 if (bulkreq.ubuffer == NULL) 772 return -EINVAL; 773 774 if (cmd == XFS_IOC_FSINUMBERS) 775 error = xfs_inumbers(mp, &inlast, &count, 776 bulkreq.ubuffer, xfs_inumbers_fmt); 777 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) 778 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer, 779 sizeof(xfs_bstat_t), NULL, &done); 780 else /* XFS_IOC_FSBULKSTAT */ 781 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, 782 sizeof(xfs_bstat_t), bulkreq.ubuffer, 783 &done); 784 785 if (error) 786 return error; 787 788 if (bulkreq.ocount != NULL) { 789 if (copy_to_user(bulkreq.lastip, &inlast, 790 sizeof(xfs_ino_t))) 791 return -EFAULT; 792 793 if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) 794 return -EFAULT; 795 } 796 797 return 0; 798 } 799 800 STATIC int 801 xfs_ioc_fsgeometry_v1( 802 xfs_mount_t *mp, 803 void __user *arg) 804 { 805 xfs_fsop_geom_t fsgeo; 806 int error; 807 808 error = xfs_fs_geometry(mp, &fsgeo, 3); 809 if (error) 810 return error; 811 812 /* 813 * Caller should have passed an argument of type 814 * xfs_fsop_geom_v1_t. This is a proper subset of the 815 * xfs_fsop_geom_t that xfs_fs_geometry() fills in. 816 */ 817 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) 818 return -EFAULT; 819 return 0; 820 } 821 822 STATIC int 823 xfs_ioc_fsgeometry( 824 xfs_mount_t *mp, 825 void __user *arg) 826 { 827 xfs_fsop_geom_t fsgeo; 828 int error; 829 830 error = xfs_fs_geometry(mp, &fsgeo, 4); 831 if (error) 832 return error; 833 834 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) 835 return -EFAULT; 836 return 0; 837 } 838 839 /* 840 * Linux extended inode flags interface. 841 */ 842 843 STATIC unsigned int 844 xfs_merge_ioc_xflags( 845 unsigned int flags, 846 unsigned int start) 847 { 848 unsigned int xflags = start; 849 850 if (flags & FS_IMMUTABLE_FL) 851 xflags |= FS_XFLAG_IMMUTABLE; 852 else 853 xflags &= ~FS_XFLAG_IMMUTABLE; 854 if (flags & FS_APPEND_FL) 855 xflags |= FS_XFLAG_APPEND; 856 else 857 xflags &= ~FS_XFLAG_APPEND; 858 if (flags & FS_SYNC_FL) 859 xflags |= FS_XFLAG_SYNC; 860 else 861 xflags &= ~FS_XFLAG_SYNC; 862 if (flags & FS_NOATIME_FL) 863 xflags |= FS_XFLAG_NOATIME; 864 else 865 xflags &= ~FS_XFLAG_NOATIME; 866 if (flags & FS_NODUMP_FL) 867 xflags |= FS_XFLAG_NODUMP; 868 else 869 xflags &= ~FS_XFLAG_NODUMP; 870 871 return xflags; 872 } 873 874 STATIC unsigned int 875 xfs_di2lxflags( 876 __uint16_t di_flags) 877 { 878 unsigned int flags = 0; 879 880 if (di_flags & XFS_DIFLAG_IMMUTABLE) 881 flags |= FS_IMMUTABLE_FL; 882 if (di_flags & XFS_DIFLAG_APPEND) 883 flags |= FS_APPEND_FL; 884 if (di_flags & XFS_DIFLAG_SYNC) 885 flags |= FS_SYNC_FL; 886 if (di_flags & XFS_DIFLAG_NOATIME) 887 flags |= FS_NOATIME_FL; 888 if (di_flags & XFS_DIFLAG_NODUMP) 889 flags |= FS_NODUMP_FL; 890 return flags; 891 } 892 893 STATIC int 894 xfs_ioc_fsgetxattr( 895 xfs_inode_t *ip, 896 int attr, 897 void __user *arg) 898 { 899 struct fsxattr fa; 900 901 memset(&fa, 0, sizeof(struct fsxattr)); 902 903 xfs_ilock(ip, XFS_ILOCK_SHARED); 904 fa.fsx_xflags = xfs_ip2xflags(ip); 905 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; 906 fa.fsx_cowextsize = ip->i_d.di_cowextsize << 907 ip->i_mount->m_sb.sb_blocklog; 908 fa.fsx_projid = xfs_get_projid(ip); 909 910 if (attr) { 911 if (ip->i_afp) { 912 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 913 fa.fsx_nextents = xfs_iext_count(ip->i_afp); 914 else 915 fa.fsx_nextents = ip->i_d.di_anextents; 916 } else 917 fa.fsx_nextents = 0; 918 } else { 919 if (ip->i_df.if_flags & XFS_IFEXTENTS) 920 fa.fsx_nextents = xfs_iext_count(&ip->i_df); 921 else 922 fa.fsx_nextents = ip->i_d.di_nextents; 923 } 924 xfs_iunlock(ip, XFS_ILOCK_SHARED); 925 926 if (copy_to_user(arg, &fa, sizeof(fa))) 927 return -EFAULT; 928 return 0; 929 } 930 931 STATIC void 932 xfs_set_diflags( 933 struct xfs_inode *ip, 934 unsigned int xflags) 935 { 936 unsigned int di_flags; 937 uint64_t di_flags2; 938 939 /* can't set PREALLOC this way, just preserve it */ 940 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 941 if (xflags & FS_XFLAG_IMMUTABLE) 942 di_flags |= XFS_DIFLAG_IMMUTABLE; 943 if (xflags & FS_XFLAG_APPEND) 944 di_flags |= XFS_DIFLAG_APPEND; 945 if (xflags & FS_XFLAG_SYNC) 946 di_flags |= XFS_DIFLAG_SYNC; 947 if (xflags & FS_XFLAG_NOATIME) 948 di_flags |= XFS_DIFLAG_NOATIME; 949 if (xflags & FS_XFLAG_NODUMP) 950 di_flags |= XFS_DIFLAG_NODUMP; 951 if (xflags & FS_XFLAG_NODEFRAG) 952 di_flags |= XFS_DIFLAG_NODEFRAG; 953 if (xflags & FS_XFLAG_FILESTREAM) 954 di_flags |= XFS_DIFLAG_FILESTREAM; 955 if (S_ISDIR(VFS_I(ip)->i_mode)) { 956 if (xflags & FS_XFLAG_RTINHERIT) 957 di_flags |= XFS_DIFLAG_RTINHERIT; 958 if (xflags & FS_XFLAG_NOSYMLINKS) 959 di_flags |= XFS_DIFLAG_NOSYMLINKS; 960 if (xflags & FS_XFLAG_EXTSZINHERIT) 961 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 962 if (xflags & FS_XFLAG_PROJINHERIT) 963 di_flags |= XFS_DIFLAG_PROJINHERIT; 964 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 965 if (xflags & FS_XFLAG_REALTIME) 966 di_flags |= XFS_DIFLAG_REALTIME; 967 if (xflags & FS_XFLAG_EXTSIZE) 968 di_flags |= XFS_DIFLAG_EXTSIZE; 969 } 970 ip->i_d.di_flags = di_flags; 971 972 /* diflags2 only valid for v3 inodes. */ 973 if (ip->i_d.di_version < 3) 974 return; 975 976 di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK); 977 if (xflags & FS_XFLAG_DAX) 978 di_flags2 |= XFS_DIFLAG2_DAX; 979 if (xflags & FS_XFLAG_COWEXTSIZE) 980 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 981 982 ip->i_d.di_flags2 = di_flags2; 983 } 984 985 STATIC void 986 xfs_diflags_to_linux( 987 struct xfs_inode *ip) 988 { 989 struct inode *inode = VFS_I(ip); 990 unsigned int xflags = xfs_ip2xflags(ip); 991 992 if (xflags & FS_XFLAG_IMMUTABLE) 993 inode->i_flags |= S_IMMUTABLE; 994 else 995 inode->i_flags &= ~S_IMMUTABLE; 996 if (xflags & FS_XFLAG_APPEND) 997 inode->i_flags |= S_APPEND; 998 else 999 inode->i_flags &= ~S_APPEND; 1000 if (xflags & FS_XFLAG_SYNC) 1001 inode->i_flags |= S_SYNC; 1002 else 1003 inode->i_flags &= ~S_SYNC; 1004 if (xflags & FS_XFLAG_NOATIME) 1005 inode->i_flags |= S_NOATIME; 1006 else 1007 inode->i_flags &= ~S_NOATIME; 1008 if (xflags & FS_XFLAG_DAX) 1009 inode->i_flags |= S_DAX; 1010 else 1011 inode->i_flags &= ~S_DAX; 1012 1013 } 1014 1015 static int 1016 xfs_ioctl_setattr_xflags( 1017 struct xfs_trans *tp, 1018 struct xfs_inode *ip, 1019 struct fsxattr *fa) 1020 { 1021 struct xfs_mount *mp = ip->i_mount; 1022 1023 /* Can't change realtime flag if any extents are allocated. */ 1024 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1025 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1026 return -EINVAL; 1027 1028 /* If realtime flag is set then must have realtime device */ 1029 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1030 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1031 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1032 return -EINVAL; 1033 } 1034 1035 /* Clear reflink if we are actually able to set the rt flag. */ 1036 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1037 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; 1038 1039 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1040 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1041 return -EINVAL; 1042 1043 /* 1044 * Can't modify an immutable/append-only file unless 1045 * we have appropriate permission. 1046 */ 1047 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) || 1048 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) && 1049 !capable(CAP_LINUX_IMMUTABLE)) 1050 return -EPERM; 1051 1052 xfs_set_diflags(ip, fa->fsx_xflags); 1053 xfs_diflags_to_linux(ip); 1054 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1055 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1056 XFS_STATS_INC(mp, xs_ig_attrchg); 1057 return 0; 1058 } 1059 1060 /* 1061 * If we are changing DAX flags, we have to ensure the file is clean and any 1062 * cached objects in the address space are invalidated and removed. This 1063 * requires us to lock out other IO and page faults similar to a truncate 1064 * operation. The locks need to be held until the transaction has been committed 1065 * so that the cache invalidation is atomic with respect to the DAX flag 1066 * manipulation. 1067 */ 1068 static int 1069 xfs_ioctl_setattr_dax_invalidate( 1070 struct xfs_inode *ip, 1071 struct fsxattr *fa, 1072 int *join_flags) 1073 { 1074 struct inode *inode = VFS_I(ip); 1075 int error; 1076 1077 *join_flags = 0; 1078 1079 /* 1080 * It is only valid to set the DAX flag on regular files and 1081 * directories on filesystems where the block size is equal to the page 1082 * size. On directories it serves as an inherit hint. 1083 */ 1084 if (fa->fsx_xflags & FS_XFLAG_DAX) { 1085 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) 1086 return -EINVAL; 1087 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE) 1088 return -EINVAL; 1089 } 1090 1091 /* If the DAX state is not changing, we have nothing to do here. */ 1092 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode)) 1093 return 0; 1094 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode)) 1095 return 0; 1096 1097 /* lock, flush and invalidate mapping in preparation for flag change */ 1098 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1099 error = filemap_write_and_wait(inode->i_mapping); 1100 if (error) 1101 goto out_unlock; 1102 error = invalidate_inode_pages2(inode->i_mapping); 1103 if (error) 1104 goto out_unlock; 1105 1106 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL; 1107 return 0; 1108 1109 out_unlock: 1110 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1111 return error; 1112 1113 } 1114 1115 /* 1116 * Set up the transaction structure for the setattr operation, checking that we 1117 * have permission to do so. On success, return a clean transaction and the 1118 * inode locked exclusively ready for further operation specific checks. On 1119 * failure, return an error without modifying or locking the inode. 1120 * 1121 * The inode might already be IO locked on call. If this is the case, it is 1122 * indicated in @join_flags and we take full responsibility for ensuring they 1123 * are unlocked from now on. Hence if we have an error here, we still have to 1124 * unlock them. Otherwise, once they are joined to the transaction, they will 1125 * be unlocked on commit/cancel. 1126 */ 1127 static struct xfs_trans * 1128 xfs_ioctl_setattr_get_trans( 1129 struct xfs_inode *ip, 1130 int join_flags) 1131 { 1132 struct xfs_mount *mp = ip->i_mount; 1133 struct xfs_trans *tp; 1134 int error = -EROFS; 1135 1136 if (mp->m_flags & XFS_MOUNT_RDONLY) 1137 goto out_unlock; 1138 error = -EIO; 1139 if (XFS_FORCED_SHUTDOWN(mp)) 1140 goto out_unlock; 1141 1142 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1143 if (error) 1144 return ERR_PTR(error); 1145 1146 xfs_ilock(ip, XFS_ILOCK_EXCL); 1147 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags); 1148 join_flags = 0; 1149 1150 /* 1151 * CAP_FOWNER overrides the following restrictions: 1152 * 1153 * The user ID of the calling process must be equal to the file owner 1154 * ID, except in cases where the CAP_FSETID capability is applicable. 1155 */ 1156 if (!inode_owner_or_capable(VFS_I(ip))) { 1157 error = -EPERM; 1158 goto out_cancel; 1159 } 1160 1161 if (mp->m_flags & XFS_MOUNT_WSYNC) 1162 xfs_trans_set_sync(tp); 1163 1164 return tp; 1165 1166 out_cancel: 1167 xfs_trans_cancel(tp); 1168 out_unlock: 1169 if (join_flags) 1170 xfs_iunlock(ip, join_flags); 1171 return ERR_PTR(error); 1172 } 1173 1174 /* 1175 * extent size hint validation is somewhat cumbersome. Rules are: 1176 * 1177 * 1. extent size hint is only valid for directories and regular files 1178 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1179 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1180 * 4. can only be changed on regular files if no extents are allocated 1181 * 5. can be changed on directories at any time 1182 * 6. extsize hint of 0 turns off hints, clears inode flags. 1183 * 7. Extent size must be a multiple of the appropriate block size. 1184 * 8. for non-realtime files, the extent size hint must be limited 1185 * to half the AG size to avoid alignment extending the extent beyond the 1186 * limits of the AG. 1187 */ 1188 static int 1189 xfs_ioctl_setattr_check_extsize( 1190 struct xfs_inode *ip, 1191 struct fsxattr *fa) 1192 { 1193 struct xfs_mount *mp = ip->i_mount; 1194 1195 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode)) 1196 return -EINVAL; 1197 1198 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) && 1199 !S_ISDIR(VFS_I(ip)->i_mode)) 1200 return -EINVAL; 1201 1202 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents && 1203 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1204 return -EINVAL; 1205 1206 if (fa->fsx_extsize != 0) { 1207 xfs_extlen_t size; 1208 xfs_fsblock_t extsize_fsb; 1209 1210 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1211 if (extsize_fsb > MAXEXTLEN) 1212 return -EINVAL; 1213 1214 if (XFS_IS_REALTIME_INODE(ip) || 1215 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1216 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1217 } else { 1218 size = mp->m_sb.sb_blocksize; 1219 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1220 return -EINVAL; 1221 } 1222 1223 if (fa->fsx_extsize % size) 1224 return -EINVAL; 1225 } else 1226 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT); 1227 1228 return 0; 1229 } 1230 1231 /* 1232 * CoW extent size hint validation rules are: 1233 * 1234 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1235 * The inode does not have to have any shared blocks, but it must be a v3. 1236 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1237 * for a directory, the hint is propagated to new files. 1238 * 3. Can be changed on files & directories at any time. 1239 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1240 * 5. Extent size must be a multiple of the appropriate block size. 1241 * 6. The extent size hint must be limited to half the AG size to avoid 1242 * alignment extending the extent beyond the limits of the AG. 1243 */ 1244 static int 1245 xfs_ioctl_setattr_check_cowextsize( 1246 struct xfs_inode *ip, 1247 struct fsxattr *fa) 1248 { 1249 struct xfs_mount *mp = ip->i_mount; 1250 1251 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1252 return 0; 1253 1254 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) || 1255 ip->i_d.di_version != 3) 1256 return -EINVAL; 1257 1258 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode)) 1259 return -EINVAL; 1260 1261 if (fa->fsx_cowextsize != 0) { 1262 xfs_extlen_t size; 1263 xfs_fsblock_t cowextsize_fsb; 1264 1265 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1266 if (cowextsize_fsb > MAXEXTLEN) 1267 return -EINVAL; 1268 1269 size = mp->m_sb.sb_blocksize; 1270 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1271 return -EINVAL; 1272 1273 if (fa->fsx_cowextsize % size) 1274 return -EINVAL; 1275 } else 1276 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE; 1277 1278 return 0; 1279 } 1280 1281 static int 1282 xfs_ioctl_setattr_check_projid( 1283 struct xfs_inode *ip, 1284 struct fsxattr *fa) 1285 { 1286 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1287 if (fa->fsx_projid > (__uint16_t)-1 && 1288 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1289 return -EINVAL; 1290 1291 /* 1292 * Project Quota ID state is only allowed to change from within the init 1293 * namespace. Enforce that restriction only if we are trying to change 1294 * the quota ID state. Everything else is allowed in user namespaces. 1295 */ 1296 if (current_user_ns() == &init_user_ns) 1297 return 0; 1298 1299 if (xfs_get_projid(ip) != fa->fsx_projid) 1300 return -EINVAL; 1301 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) != 1302 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)) 1303 return -EINVAL; 1304 1305 return 0; 1306 } 1307 1308 STATIC int 1309 xfs_ioctl_setattr( 1310 xfs_inode_t *ip, 1311 struct fsxattr *fa) 1312 { 1313 struct xfs_mount *mp = ip->i_mount; 1314 struct xfs_trans *tp; 1315 struct xfs_dquot *udqp = NULL; 1316 struct xfs_dquot *pdqp = NULL; 1317 struct xfs_dquot *olddquot = NULL; 1318 int code; 1319 int join_flags = 0; 1320 1321 trace_xfs_ioctl_setattr(ip); 1322 1323 code = xfs_ioctl_setattr_check_projid(ip, fa); 1324 if (code) 1325 return code; 1326 1327 /* 1328 * If disk quotas is on, we make sure that the dquots do exist on disk, 1329 * before we start any other transactions. Trying to do this later 1330 * is messy. We don't care to take a readlock to look at the ids 1331 * in inode here, because we can't hold it across the trans_reserve. 1332 * If the IDs do change before we take the ilock, we're covered 1333 * because the i_*dquot fields will get updated anyway. 1334 */ 1335 if (XFS_IS_QUOTA_ON(mp)) { 1336 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1337 ip->i_d.di_gid, fa->fsx_projid, 1338 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1339 if (code) 1340 return code; 1341 } 1342 1343 /* 1344 * Changing DAX config may require inode locking for mapping 1345 * invalidation. These need to be held all the way to transaction commit 1346 * or cancel time, so need to be passed through to 1347 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1348 * appropriately. 1349 */ 1350 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags); 1351 if (code) 1352 goto error_free_dquots; 1353 1354 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1355 if (IS_ERR(tp)) { 1356 code = PTR_ERR(tp); 1357 goto error_free_dquots; 1358 } 1359 1360 1361 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1362 xfs_get_projid(ip) != fa->fsx_projid) { 1363 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1364 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1365 if (code) /* out of quota */ 1366 goto error_trans_cancel; 1367 } 1368 1369 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1370 if (code) 1371 goto error_trans_cancel; 1372 1373 code = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1374 if (code) 1375 goto error_trans_cancel; 1376 1377 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1378 if (code) 1379 goto error_trans_cancel; 1380 1381 /* 1382 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1383 * overrides the following restrictions: 1384 * 1385 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1386 * successful return from chown() 1387 */ 1388 1389 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1390 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1391 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1392 1393 /* Change the ownerships and register project quota modifications */ 1394 if (xfs_get_projid(ip) != fa->fsx_projid) { 1395 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1396 olddquot = xfs_qm_vop_chown(tp, ip, 1397 &ip->i_pdquot, pdqp); 1398 } 1399 ASSERT(ip->i_d.di_version > 1); 1400 xfs_set_projid(ip, fa->fsx_projid); 1401 } 1402 1403 /* 1404 * Only set the extent size hint if we've already determined that the 1405 * extent size hint should be set on the inode. If no extent size flags 1406 * are set on the inode then unconditionally clear the extent size hint. 1407 */ 1408 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1409 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1410 else 1411 ip->i_d.di_extsize = 0; 1412 if (ip->i_d.di_version == 3 && 1413 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) 1414 ip->i_d.di_cowextsize = fa->fsx_cowextsize >> 1415 mp->m_sb.sb_blocklog; 1416 else 1417 ip->i_d.di_cowextsize = 0; 1418 1419 code = xfs_trans_commit(tp); 1420 1421 /* 1422 * Release any dquot(s) the inode had kept before chown. 1423 */ 1424 xfs_qm_dqrele(olddquot); 1425 xfs_qm_dqrele(udqp); 1426 xfs_qm_dqrele(pdqp); 1427 1428 return code; 1429 1430 error_trans_cancel: 1431 xfs_trans_cancel(tp); 1432 error_free_dquots: 1433 xfs_qm_dqrele(udqp); 1434 xfs_qm_dqrele(pdqp); 1435 return code; 1436 } 1437 1438 STATIC int 1439 xfs_ioc_fssetxattr( 1440 xfs_inode_t *ip, 1441 struct file *filp, 1442 void __user *arg) 1443 { 1444 struct fsxattr fa; 1445 int error; 1446 1447 if (copy_from_user(&fa, arg, sizeof(fa))) 1448 return -EFAULT; 1449 1450 error = mnt_want_write_file(filp); 1451 if (error) 1452 return error; 1453 error = xfs_ioctl_setattr(ip, &fa); 1454 mnt_drop_write_file(filp); 1455 return error; 1456 } 1457 1458 STATIC int 1459 xfs_ioc_getxflags( 1460 xfs_inode_t *ip, 1461 void __user *arg) 1462 { 1463 unsigned int flags; 1464 1465 flags = xfs_di2lxflags(ip->i_d.di_flags); 1466 if (copy_to_user(arg, &flags, sizeof(flags))) 1467 return -EFAULT; 1468 return 0; 1469 } 1470 1471 STATIC int 1472 xfs_ioc_setxflags( 1473 struct xfs_inode *ip, 1474 struct file *filp, 1475 void __user *arg) 1476 { 1477 struct xfs_trans *tp; 1478 struct fsxattr fa; 1479 unsigned int flags; 1480 int join_flags = 0; 1481 int error; 1482 1483 if (copy_from_user(&flags, arg, sizeof(flags))) 1484 return -EFAULT; 1485 1486 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1487 FS_NOATIME_FL | FS_NODUMP_FL | \ 1488 FS_SYNC_FL)) 1489 return -EOPNOTSUPP; 1490 1491 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1492 1493 error = mnt_want_write_file(filp); 1494 if (error) 1495 return error; 1496 1497 /* 1498 * Changing DAX config may require inode locking for mapping 1499 * invalidation. These need to be held all the way to transaction commit 1500 * or cancel time, so need to be passed through to 1501 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1502 * appropriately. 1503 */ 1504 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags); 1505 if (error) 1506 goto out_drop_write; 1507 1508 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1509 if (IS_ERR(tp)) { 1510 error = PTR_ERR(tp); 1511 goto out_drop_write; 1512 } 1513 1514 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1515 if (error) { 1516 xfs_trans_cancel(tp); 1517 goto out_drop_write; 1518 } 1519 1520 error = xfs_trans_commit(tp); 1521 out_drop_write: 1522 mnt_drop_write_file(filp); 1523 return error; 1524 } 1525 1526 STATIC int 1527 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) 1528 { 1529 struct getbmap __user *base = (struct getbmap __user *)*ap; 1530 1531 /* copy only getbmap portion (not getbmapx) */ 1532 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1533 return -EFAULT; 1534 1535 *ap += sizeof(struct getbmap); 1536 return 0; 1537 } 1538 1539 STATIC int 1540 xfs_ioc_getbmap( 1541 struct file *file, 1542 unsigned int cmd, 1543 void __user *arg) 1544 { 1545 struct getbmapx bmx; 1546 int error; 1547 1548 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) 1549 return -EFAULT; 1550 1551 if (bmx.bmv_count < 2) 1552 return -EINVAL; 1553 1554 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1555 if (file->f_mode & FMODE_NOCMTIME) 1556 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1557 1558 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format, 1559 (__force struct getbmap *)arg+1); 1560 if (error) 1561 return error; 1562 1563 /* copy back header - only size of getbmap */ 1564 if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) 1565 return -EFAULT; 1566 return 0; 1567 } 1568 1569 STATIC int 1570 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) 1571 { 1572 struct getbmapx __user *base = (struct getbmapx __user *)*ap; 1573 1574 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1575 return -EFAULT; 1576 1577 *ap += sizeof(struct getbmapx); 1578 return 0; 1579 } 1580 1581 STATIC int 1582 xfs_ioc_getbmapx( 1583 struct xfs_inode *ip, 1584 void __user *arg) 1585 { 1586 struct getbmapx bmx; 1587 int error; 1588 1589 if (copy_from_user(&bmx, arg, sizeof(bmx))) 1590 return -EFAULT; 1591 1592 if (bmx.bmv_count < 2) 1593 return -EINVAL; 1594 1595 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1596 return -EINVAL; 1597 1598 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1599 (__force struct getbmapx *)arg+1); 1600 if (error) 1601 return error; 1602 1603 /* copy back header */ 1604 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) 1605 return -EFAULT; 1606 1607 return 0; 1608 } 1609 1610 int 1611 xfs_ioc_swapext( 1612 xfs_swapext_t *sxp) 1613 { 1614 xfs_inode_t *ip, *tip; 1615 struct fd f, tmp; 1616 int error = 0; 1617 1618 /* Pull information for the target fd */ 1619 f = fdget((int)sxp->sx_fdtarget); 1620 if (!f.file) { 1621 error = -EINVAL; 1622 goto out; 1623 } 1624 1625 if (!(f.file->f_mode & FMODE_WRITE) || 1626 !(f.file->f_mode & FMODE_READ) || 1627 (f.file->f_flags & O_APPEND)) { 1628 error = -EBADF; 1629 goto out_put_file; 1630 } 1631 1632 tmp = fdget((int)sxp->sx_fdtmp); 1633 if (!tmp.file) { 1634 error = -EINVAL; 1635 goto out_put_file; 1636 } 1637 1638 if (!(tmp.file->f_mode & FMODE_WRITE) || 1639 !(tmp.file->f_mode & FMODE_READ) || 1640 (tmp.file->f_flags & O_APPEND)) { 1641 error = -EBADF; 1642 goto out_put_tmp_file; 1643 } 1644 1645 if (IS_SWAPFILE(file_inode(f.file)) || 1646 IS_SWAPFILE(file_inode(tmp.file))) { 1647 error = -EINVAL; 1648 goto out_put_tmp_file; 1649 } 1650 1651 /* 1652 * We need to ensure that the fds passed in point to XFS inodes 1653 * before we cast and access them as XFS structures as we have no 1654 * control over what the user passes us here. 1655 */ 1656 if (f.file->f_op != &xfs_file_operations || 1657 tmp.file->f_op != &xfs_file_operations) { 1658 error = -EINVAL; 1659 goto out_put_tmp_file; 1660 } 1661 1662 ip = XFS_I(file_inode(f.file)); 1663 tip = XFS_I(file_inode(tmp.file)); 1664 1665 if (ip->i_mount != tip->i_mount) { 1666 error = -EINVAL; 1667 goto out_put_tmp_file; 1668 } 1669 1670 if (ip->i_ino == tip->i_ino) { 1671 error = -EINVAL; 1672 goto out_put_tmp_file; 1673 } 1674 1675 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1676 error = -EIO; 1677 goto out_put_tmp_file; 1678 } 1679 1680 error = xfs_swap_extents(ip, tip, sxp); 1681 1682 out_put_tmp_file: 1683 fdput(tmp); 1684 out_put_file: 1685 fdput(f); 1686 out: 1687 return error; 1688 } 1689 1690 /* 1691 * Note: some of the ioctl's return positive numbers as a 1692 * byte count indicating success, such as readlink_by_handle. 1693 * So we don't "sign flip" like most other routines. This means 1694 * true errors need to be returned as a negative value. 1695 */ 1696 long 1697 xfs_file_ioctl( 1698 struct file *filp, 1699 unsigned int cmd, 1700 unsigned long p) 1701 { 1702 struct inode *inode = file_inode(filp); 1703 struct xfs_inode *ip = XFS_I(inode); 1704 struct xfs_mount *mp = ip->i_mount; 1705 void __user *arg = (void __user *)p; 1706 int error; 1707 1708 trace_xfs_file_ioctl(ip); 1709 1710 switch (cmd) { 1711 case FITRIM: 1712 return xfs_ioc_trim(mp, arg); 1713 case XFS_IOC_ALLOCSP: 1714 case XFS_IOC_FREESP: 1715 case XFS_IOC_RESVSP: 1716 case XFS_IOC_UNRESVSP: 1717 case XFS_IOC_ALLOCSP64: 1718 case XFS_IOC_FREESP64: 1719 case XFS_IOC_RESVSP64: 1720 case XFS_IOC_UNRESVSP64: 1721 case XFS_IOC_ZERO_RANGE: { 1722 xfs_flock64_t bf; 1723 1724 if (copy_from_user(&bf, arg, sizeof(bf))) 1725 return -EFAULT; 1726 return xfs_ioc_space(filp, cmd, &bf); 1727 } 1728 case XFS_IOC_DIOINFO: { 1729 struct dioattr da; 1730 xfs_buftarg_t *target = 1731 XFS_IS_REALTIME_INODE(ip) ? 1732 mp->m_rtdev_targp : mp->m_ddev_targp; 1733 1734 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1735 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1736 1737 if (copy_to_user(arg, &da, sizeof(da))) 1738 return -EFAULT; 1739 return 0; 1740 } 1741 1742 case XFS_IOC_FSBULKSTAT_SINGLE: 1743 case XFS_IOC_FSBULKSTAT: 1744 case XFS_IOC_FSINUMBERS: 1745 return xfs_ioc_bulkstat(mp, cmd, arg); 1746 1747 case XFS_IOC_FSGEOMETRY_V1: 1748 return xfs_ioc_fsgeometry_v1(mp, arg); 1749 1750 case XFS_IOC_FSGEOMETRY: 1751 return xfs_ioc_fsgeometry(mp, arg); 1752 1753 case XFS_IOC_GETVERSION: 1754 return put_user(inode->i_generation, (int __user *)arg); 1755 1756 case XFS_IOC_FSGETXATTR: 1757 return xfs_ioc_fsgetxattr(ip, 0, arg); 1758 case XFS_IOC_FSGETXATTRA: 1759 return xfs_ioc_fsgetxattr(ip, 1, arg); 1760 case XFS_IOC_FSSETXATTR: 1761 return xfs_ioc_fssetxattr(ip, filp, arg); 1762 case XFS_IOC_GETXFLAGS: 1763 return xfs_ioc_getxflags(ip, arg); 1764 case XFS_IOC_SETXFLAGS: 1765 return xfs_ioc_setxflags(ip, filp, arg); 1766 1767 case XFS_IOC_FSSETDM: { 1768 struct fsdmidata dmi; 1769 1770 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1771 return -EFAULT; 1772 1773 error = mnt_want_write_file(filp); 1774 if (error) 1775 return error; 1776 1777 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1778 dmi.fsd_dmstate); 1779 mnt_drop_write_file(filp); 1780 return error; 1781 } 1782 1783 case XFS_IOC_GETBMAP: 1784 case XFS_IOC_GETBMAPA: 1785 return xfs_ioc_getbmap(filp, cmd, arg); 1786 1787 case XFS_IOC_GETBMAPX: 1788 return xfs_ioc_getbmapx(ip, arg); 1789 1790 case XFS_IOC_FD_TO_HANDLE: 1791 case XFS_IOC_PATH_TO_HANDLE: 1792 case XFS_IOC_PATH_TO_FSHANDLE: { 1793 xfs_fsop_handlereq_t hreq; 1794 1795 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1796 return -EFAULT; 1797 return xfs_find_handle(cmd, &hreq); 1798 } 1799 case XFS_IOC_OPEN_BY_HANDLE: { 1800 xfs_fsop_handlereq_t hreq; 1801 1802 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1803 return -EFAULT; 1804 return xfs_open_by_handle(filp, &hreq); 1805 } 1806 case XFS_IOC_FSSETDM_BY_HANDLE: 1807 return xfs_fssetdm_by_handle(filp, arg); 1808 1809 case XFS_IOC_READLINK_BY_HANDLE: { 1810 xfs_fsop_handlereq_t hreq; 1811 1812 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1813 return -EFAULT; 1814 return xfs_readlink_by_handle(filp, &hreq); 1815 } 1816 case XFS_IOC_ATTRLIST_BY_HANDLE: 1817 return xfs_attrlist_by_handle(filp, arg); 1818 1819 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1820 return xfs_attrmulti_by_handle(filp, arg); 1821 1822 case XFS_IOC_SWAPEXT: { 1823 struct xfs_swapext sxp; 1824 1825 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1826 return -EFAULT; 1827 error = mnt_want_write_file(filp); 1828 if (error) 1829 return error; 1830 error = xfs_ioc_swapext(&sxp); 1831 mnt_drop_write_file(filp); 1832 return error; 1833 } 1834 1835 case XFS_IOC_FSCOUNTS: { 1836 xfs_fsop_counts_t out; 1837 1838 error = xfs_fs_counts(mp, &out); 1839 if (error) 1840 return error; 1841 1842 if (copy_to_user(arg, &out, sizeof(out))) 1843 return -EFAULT; 1844 return 0; 1845 } 1846 1847 case XFS_IOC_SET_RESBLKS: { 1848 xfs_fsop_resblks_t inout; 1849 __uint64_t in; 1850 1851 if (!capable(CAP_SYS_ADMIN)) 1852 return -EPERM; 1853 1854 if (mp->m_flags & XFS_MOUNT_RDONLY) 1855 return -EROFS; 1856 1857 if (copy_from_user(&inout, arg, sizeof(inout))) 1858 return -EFAULT; 1859 1860 error = mnt_want_write_file(filp); 1861 if (error) 1862 return error; 1863 1864 /* input parameter is passed in resblks field of structure */ 1865 in = inout.resblks; 1866 error = xfs_reserve_blocks(mp, &in, &inout); 1867 mnt_drop_write_file(filp); 1868 if (error) 1869 return error; 1870 1871 if (copy_to_user(arg, &inout, sizeof(inout))) 1872 return -EFAULT; 1873 return 0; 1874 } 1875 1876 case XFS_IOC_GET_RESBLKS: { 1877 xfs_fsop_resblks_t out; 1878 1879 if (!capable(CAP_SYS_ADMIN)) 1880 return -EPERM; 1881 1882 error = xfs_reserve_blocks(mp, NULL, &out); 1883 if (error) 1884 return error; 1885 1886 if (copy_to_user(arg, &out, sizeof(out))) 1887 return -EFAULT; 1888 1889 return 0; 1890 } 1891 1892 case XFS_IOC_FSGROWFSDATA: { 1893 xfs_growfs_data_t in; 1894 1895 if (copy_from_user(&in, arg, sizeof(in))) 1896 return -EFAULT; 1897 1898 error = mnt_want_write_file(filp); 1899 if (error) 1900 return error; 1901 error = xfs_growfs_data(mp, &in); 1902 mnt_drop_write_file(filp); 1903 return error; 1904 } 1905 1906 case XFS_IOC_FSGROWFSLOG: { 1907 xfs_growfs_log_t in; 1908 1909 if (copy_from_user(&in, arg, sizeof(in))) 1910 return -EFAULT; 1911 1912 error = mnt_want_write_file(filp); 1913 if (error) 1914 return error; 1915 error = xfs_growfs_log(mp, &in); 1916 mnt_drop_write_file(filp); 1917 return error; 1918 } 1919 1920 case XFS_IOC_FSGROWFSRT: { 1921 xfs_growfs_rt_t in; 1922 1923 if (copy_from_user(&in, arg, sizeof(in))) 1924 return -EFAULT; 1925 1926 error = mnt_want_write_file(filp); 1927 if (error) 1928 return error; 1929 error = xfs_growfs_rt(mp, &in); 1930 mnt_drop_write_file(filp); 1931 return error; 1932 } 1933 1934 case XFS_IOC_GOINGDOWN: { 1935 __uint32_t in; 1936 1937 if (!capable(CAP_SYS_ADMIN)) 1938 return -EPERM; 1939 1940 if (get_user(in, (__uint32_t __user *)arg)) 1941 return -EFAULT; 1942 1943 return xfs_fs_goingdown(mp, in); 1944 } 1945 1946 case XFS_IOC_ERROR_INJECTION: { 1947 xfs_error_injection_t in; 1948 1949 if (!capable(CAP_SYS_ADMIN)) 1950 return -EPERM; 1951 1952 if (copy_from_user(&in, arg, sizeof(in))) 1953 return -EFAULT; 1954 1955 return xfs_errortag_add(in.errtag, mp); 1956 } 1957 1958 case XFS_IOC_ERROR_CLEARALL: 1959 if (!capable(CAP_SYS_ADMIN)) 1960 return -EPERM; 1961 1962 return xfs_errortag_clearall(mp, 1); 1963 1964 case XFS_IOC_FREE_EOFBLOCKS: { 1965 struct xfs_fs_eofblocks eofb; 1966 struct xfs_eofblocks keofb; 1967 1968 if (!capable(CAP_SYS_ADMIN)) 1969 return -EPERM; 1970 1971 if (mp->m_flags & XFS_MOUNT_RDONLY) 1972 return -EROFS; 1973 1974 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1975 return -EFAULT; 1976 1977 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 1978 if (error) 1979 return error; 1980 1981 return xfs_icache_free_eofblocks(mp, &keofb); 1982 } 1983 1984 default: 1985 return -ENOTTY; 1986 } 1987 } 1988