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_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 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, false); 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_setattr_size(ip, &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_projid = xfs_get_projid(ip); 907 908 if (attr) { 909 if (ip->i_afp) { 910 if (ip->i_afp->if_flags & XFS_IFEXTENTS) 911 fa.fsx_nextents = ip->i_afp->if_bytes / 912 sizeof(xfs_bmbt_rec_t); 913 else 914 fa.fsx_nextents = ip->i_d.di_anextents; 915 } else 916 fa.fsx_nextents = 0; 917 } else { 918 if (ip->i_df.if_flags & XFS_IFEXTENTS) 919 fa.fsx_nextents = ip->i_df.if_bytes / 920 sizeof(xfs_bmbt_rec_t); 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 = 0; 977 if (xflags & FS_XFLAG_DAX) 978 di_flags2 |= XFS_DIFLAG2_DAX; 979 980 ip->i_d.di_flags2 = di_flags2; 981 982 } 983 984 STATIC void 985 xfs_diflags_to_linux( 986 struct xfs_inode *ip) 987 { 988 struct inode *inode = VFS_I(ip); 989 unsigned int xflags = xfs_ip2xflags(ip); 990 991 if (xflags & FS_XFLAG_IMMUTABLE) 992 inode->i_flags |= S_IMMUTABLE; 993 else 994 inode->i_flags &= ~S_IMMUTABLE; 995 if (xflags & FS_XFLAG_APPEND) 996 inode->i_flags |= S_APPEND; 997 else 998 inode->i_flags &= ~S_APPEND; 999 if (xflags & FS_XFLAG_SYNC) 1000 inode->i_flags |= S_SYNC; 1001 else 1002 inode->i_flags &= ~S_SYNC; 1003 if (xflags & FS_XFLAG_NOATIME) 1004 inode->i_flags |= S_NOATIME; 1005 else 1006 inode->i_flags &= ~S_NOATIME; 1007 if (xflags & FS_XFLAG_DAX) 1008 inode->i_flags |= S_DAX; 1009 else 1010 inode->i_flags &= ~S_DAX; 1011 1012 } 1013 1014 static int 1015 xfs_ioctl_setattr_xflags( 1016 struct xfs_trans *tp, 1017 struct xfs_inode *ip, 1018 struct fsxattr *fa) 1019 { 1020 struct xfs_mount *mp = ip->i_mount; 1021 1022 /* Can't change realtime flag if any extents are allocated. */ 1023 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1024 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1025 return -EINVAL; 1026 1027 /* If realtime flag is set then must have realtime device */ 1028 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1029 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1030 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1031 return -EINVAL; 1032 } 1033 1034 /* 1035 * Can't modify an immutable/append-only file unless 1036 * we have appropriate permission. 1037 */ 1038 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) || 1039 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) && 1040 !capable(CAP_LINUX_IMMUTABLE)) 1041 return -EPERM; 1042 1043 xfs_set_diflags(ip, fa->fsx_xflags); 1044 xfs_diflags_to_linux(ip); 1045 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1046 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1047 XFS_STATS_INC(mp, xs_ig_attrchg); 1048 return 0; 1049 } 1050 1051 /* 1052 * If we are changing DAX flags, we have to ensure the file is clean and any 1053 * cached objects in the address space are invalidated and removed. This 1054 * requires us to lock out other IO and page faults similar to a truncate 1055 * operation. The locks need to be held until the transaction has been committed 1056 * so that the cache invalidation is atomic with respect to the DAX flag 1057 * manipulation. 1058 */ 1059 static int 1060 xfs_ioctl_setattr_dax_invalidate( 1061 struct xfs_inode *ip, 1062 struct fsxattr *fa, 1063 int *join_flags) 1064 { 1065 struct inode *inode = VFS_I(ip); 1066 int error; 1067 1068 *join_flags = 0; 1069 1070 /* 1071 * It is only valid to set the DAX flag on regular files and 1072 * directories on filesystems where the block size is equal to the page 1073 * size. On directories it serves as an inherit hint. 1074 */ 1075 if (fa->fsx_xflags & FS_XFLAG_DAX) { 1076 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) 1077 return -EINVAL; 1078 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE) 1079 return -EINVAL; 1080 } 1081 1082 /* If the DAX state is not changing, we have nothing to do here. */ 1083 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode)) 1084 return 0; 1085 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode)) 1086 return 0; 1087 1088 /* lock, flush and invalidate mapping in preparation for flag change */ 1089 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1090 error = filemap_write_and_wait(inode->i_mapping); 1091 if (error) 1092 goto out_unlock; 1093 error = invalidate_inode_pages2(inode->i_mapping); 1094 if (error) 1095 goto out_unlock; 1096 1097 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL; 1098 return 0; 1099 1100 out_unlock: 1101 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1102 return error; 1103 1104 } 1105 1106 /* 1107 * Set up the transaction structure for the setattr operation, checking that we 1108 * have permission to do so. On success, return a clean transaction and the 1109 * inode locked exclusively ready for further operation specific checks. On 1110 * failure, return an error without modifying or locking the inode. 1111 * 1112 * The inode might already be IO locked on call. If this is the case, it is 1113 * indicated in @join_flags and we take full responsibility for ensuring they 1114 * are unlocked from now on. Hence if we have an error here, we still have to 1115 * unlock them. Otherwise, once they are joined to the transaction, they will 1116 * be unlocked on commit/cancel. 1117 */ 1118 static struct xfs_trans * 1119 xfs_ioctl_setattr_get_trans( 1120 struct xfs_inode *ip, 1121 int join_flags) 1122 { 1123 struct xfs_mount *mp = ip->i_mount; 1124 struct xfs_trans *tp; 1125 int error = -EROFS; 1126 1127 if (mp->m_flags & XFS_MOUNT_RDONLY) 1128 goto out_unlock; 1129 error = -EIO; 1130 if (XFS_FORCED_SHUTDOWN(mp)) 1131 goto out_unlock; 1132 1133 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1134 if (error) 1135 return ERR_PTR(error); 1136 1137 xfs_ilock(ip, XFS_ILOCK_EXCL); 1138 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags); 1139 join_flags = 0; 1140 1141 /* 1142 * CAP_FOWNER overrides the following restrictions: 1143 * 1144 * The user ID of the calling process must be equal to the file owner 1145 * ID, except in cases where the CAP_FSETID capability is applicable. 1146 */ 1147 if (!inode_owner_or_capable(VFS_I(ip))) { 1148 error = -EPERM; 1149 goto out_cancel; 1150 } 1151 1152 if (mp->m_flags & XFS_MOUNT_WSYNC) 1153 xfs_trans_set_sync(tp); 1154 1155 return tp; 1156 1157 out_cancel: 1158 xfs_trans_cancel(tp); 1159 out_unlock: 1160 if (join_flags) 1161 xfs_iunlock(ip, join_flags); 1162 return ERR_PTR(error); 1163 } 1164 1165 /* 1166 * extent size hint validation is somewhat cumbersome. Rules are: 1167 * 1168 * 1. extent size hint is only valid for directories and regular files 1169 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1170 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1171 * 4. can only be changed on regular files if no extents are allocated 1172 * 5. can be changed on directories at any time 1173 * 6. extsize hint of 0 turns off hints, clears inode flags. 1174 * 7. Extent size must be a multiple of the appropriate block size. 1175 * 8. for non-realtime files, the extent size hint must be limited 1176 * to half the AG size to avoid alignment extending the extent beyond the 1177 * limits of the AG. 1178 */ 1179 static int 1180 xfs_ioctl_setattr_check_extsize( 1181 struct xfs_inode *ip, 1182 struct fsxattr *fa) 1183 { 1184 struct xfs_mount *mp = ip->i_mount; 1185 1186 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode)) 1187 return -EINVAL; 1188 1189 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) && 1190 !S_ISDIR(VFS_I(ip)->i_mode)) 1191 return -EINVAL; 1192 1193 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents && 1194 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1195 return -EINVAL; 1196 1197 if (fa->fsx_extsize != 0) { 1198 xfs_extlen_t size; 1199 xfs_fsblock_t extsize_fsb; 1200 1201 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1202 if (extsize_fsb > MAXEXTLEN) 1203 return -EINVAL; 1204 1205 if (XFS_IS_REALTIME_INODE(ip) || 1206 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1207 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1208 } else { 1209 size = mp->m_sb.sb_blocksize; 1210 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1211 return -EINVAL; 1212 } 1213 1214 if (fa->fsx_extsize % size) 1215 return -EINVAL; 1216 } else 1217 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT); 1218 1219 return 0; 1220 } 1221 1222 static int 1223 xfs_ioctl_setattr_check_projid( 1224 struct xfs_inode *ip, 1225 struct fsxattr *fa) 1226 { 1227 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1228 if (fa->fsx_projid > (__uint16_t)-1 && 1229 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1230 return -EINVAL; 1231 1232 /* 1233 * Project Quota ID state is only allowed to change from within the init 1234 * namespace. Enforce that restriction only if we are trying to change 1235 * the quota ID state. Everything else is allowed in user namespaces. 1236 */ 1237 if (current_user_ns() == &init_user_ns) 1238 return 0; 1239 1240 if (xfs_get_projid(ip) != fa->fsx_projid) 1241 return -EINVAL; 1242 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) != 1243 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)) 1244 return -EINVAL; 1245 1246 return 0; 1247 } 1248 1249 STATIC int 1250 xfs_ioctl_setattr( 1251 xfs_inode_t *ip, 1252 struct fsxattr *fa) 1253 { 1254 struct xfs_mount *mp = ip->i_mount; 1255 struct xfs_trans *tp; 1256 struct xfs_dquot *udqp = NULL; 1257 struct xfs_dquot *pdqp = NULL; 1258 struct xfs_dquot *olddquot = NULL; 1259 int code; 1260 int join_flags = 0; 1261 1262 trace_xfs_ioctl_setattr(ip); 1263 1264 code = xfs_ioctl_setattr_check_projid(ip, fa); 1265 if (code) 1266 return code; 1267 1268 /* 1269 * If disk quotas is on, we make sure that the dquots do exist on disk, 1270 * before we start any other transactions. Trying to do this later 1271 * is messy. We don't care to take a readlock to look at the ids 1272 * in inode here, because we can't hold it across the trans_reserve. 1273 * If the IDs do change before we take the ilock, we're covered 1274 * because the i_*dquot fields will get updated anyway. 1275 */ 1276 if (XFS_IS_QUOTA_ON(mp)) { 1277 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1278 ip->i_d.di_gid, fa->fsx_projid, 1279 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1280 if (code) 1281 return code; 1282 } 1283 1284 /* 1285 * Changing DAX config may require inode locking for mapping 1286 * invalidation. These need to be held all the way to transaction commit 1287 * or cancel time, so need to be passed through to 1288 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1289 * appropriately. 1290 */ 1291 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags); 1292 if (code) 1293 goto error_free_dquots; 1294 1295 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1296 if (IS_ERR(tp)) { 1297 code = PTR_ERR(tp); 1298 goto error_free_dquots; 1299 } 1300 1301 1302 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1303 xfs_get_projid(ip) != fa->fsx_projid) { 1304 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1305 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1306 if (code) /* out of quota */ 1307 goto error_trans_cancel; 1308 } 1309 1310 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1311 if (code) 1312 goto error_trans_cancel; 1313 1314 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1315 if (code) 1316 goto error_trans_cancel; 1317 1318 /* 1319 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1320 * overrides the following restrictions: 1321 * 1322 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1323 * successful return from chown() 1324 */ 1325 1326 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1327 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1328 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1329 1330 /* Change the ownerships and register project quota modifications */ 1331 if (xfs_get_projid(ip) != fa->fsx_projid) { 1332 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1333 olddquot = xfs_qm_vop_chown(tp, ip, 1334 &ip->i_pdquot, pdqp); 1335 } 1336 ASSERT(ip->i_d.di_version > 1); 1337 xfs_set_projid(ip, fa->fsx_projid); 1338 } 1339 1340 /* 1341 * Only set the extent size hint if we've already determined that the 1342 * extent size hint should be set on the inode. If no extent size flags 1343 * are set on the inode then unconditionally clear the extent size hint. 1344 */ 1345 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1346 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1347 else 1348 ip->i_d.di_extsize = 0; 1349 1350 code = xfs_trans_commit(tp); 1351 1352 /* 1353 * Release any dquot(s) the inode had kept before chown. 1354 */ 1355 xfs_qm_dqrele(olddquot); 1356 xfs_qm_dqrele(udqp); 1357 xfs_qm_dqrele(pdqp); 1358 1359 return code; 1360 1361 error_trans_cancel: 1362 xfs_trans_cancel(tp); 1363 error_free_dquots: 1364 xfs_qm_dqrele(udqp); 1365 xfs_qm_dqrele(pdqp); 1366 return code; 1367 } 1368 1369 STATIC int 1370 xfs_ioc_fssetxattr( 1371 xfs_inode_t *ip, 1372 struct file *filp, 1373 void __user *arg) 1374 { 1375 struct fsxattr fa; 1376 int error; 1377 1378 if (copy_from_user(&fa, arg, sizeof(fa))) 1379 return -EFAULT; 1380 1381 error = mnt_want_write_file(filp); 1382 if (error) 1383 return error; 1384 error = xfs_ioctl_setattr(ip, &fa); 1385 mnt_drop_write_file(filp); 1386 return error; 1387 } 1388 1389 STATIC int 1390 xfs_ioc_getxflags( 1391 xfs_inode_t *ip, 1392 void __user *arg) 1393 { 1394 unsigned int flags; 1395 1396 flags = xfs_di2lxflags(ip->i_d.di_flags); 1397 if (copy_to_user(arg, &flags, sizeof(flags))) 1398 return -EFAULT; 1399 return 0; 1400 } 1401 1402 STATIC int 1403 xfs_ioc_setxflags( 1404 struct xfs_inode *ip, 1405 struct file *filp, 1406 void __user *arg) 1407 { 1408 struct xfs_trans *tp; 1409 struct fsxattr fa; 1410 unsigned int flags; 1411 int join_flags = 0; 1412 int error; 1413 1414 if (copy_from_user(&flags, arg, sizeof(flags))) 1415 return -EFAULT; 1416 1417 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1418 FS_NOATIME_FL | FS_NODUMP_FL | \ 1419 FS_SYNC_FL)) 1420 return -EOPNOTSUPP; 1421 1422 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1423 1424 error = mnt_want_write_file(filp); 1425 if (error) 1426 return error; 1427 1428 /* 1429 * Changing DAX config may require inode locking for mapping 1430 * invalidation. These need to be held all the way to transaction commit 1431 * or cancel time, so need to be passed through to 1432 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1433 * appropriately. 1434 */ 1435 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags); 1436 if (error) 1437 goto out_drop_write; 1438 1439 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1440 if (IS_ERR(tp)) { 1441 error = PTR_ERR(tp); 1442 goto out_drop_write; 1443 } 1444 1445 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1446 if (error) { 1447 xfs_trans_cancel(tp); 1448 goto out_drop_write; 1449 } 1450 1451 error = xfs_trans_commit(tp); 1452 out_drop_write: 1453 mnt_drop_write_file(filp); 1454 return error; 1455 } 1456 1457 STATIC int 1458 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) 1459 { 1460 struct getbmap __user *base = (struct getbmap __user *)*ap; 1461 1462 /* copy only getbmap portion (not getbmapx) */ 1463 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1464 return -EFAULT; 1465 1466 *ap += sizeof(struct getbmap); 1467 return 0; 1468 } 1469 1470 STATIC int 1471 xfs_ioc_getbmap( 1472 struct file *file, 1473 unsigned int cmd, 1474 void __user *arg) 1475 { 1476 struct getbmapx bmx; 1477 int error; 1478 1479 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) 1480 return -EFAULT; 1481 1482 if (bmx.bmv_count < 2) 1483 return -EINVAL; 1484 1485 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1486 if (file->f_mode & FMODE_NOCMTIME) 1487 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1488 1489 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format, 1490 (__force struct getbmap *)arg+1); 1491 if (error) 1492 return error; 1493 1494 /* copy back header - only size of getbmap */ 1495 if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) 1496 return -EFAULT; 1497 return 0; 1498 } 1499 1500 STATIC int 1501 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) 1502 { 1503 struct getbmapx __user *base = (struct getbmapx __user *)*ap; 1504 1505 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1506 return -EFAULT; 1507 1508 *ap += sizeof(struct getbmapx); 1509 return 0; 1510 } 1511 1512 STATIC int 1513 xfs_ioc_getbmapx( 1514 struct xfs_inode *ip, 1515 void __user *arg) 1516 { 1517 struct getbmapx bmx; 1518 int error; 1519 1520 if (copy_from_user(&bmx, arg, sizeof(bmx))) 1521 return -EFAULT; 1522 1523 if (bmx.bmv_count < 2) 1524 return -EINVAL; 1525 1526 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1527 return -EINVAL; 1528 1529 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1530 (__force struct getbmapx *)arg+1); 1531 if (error) 1532 return error; 1533 1534 /* copy back header */ 1535 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) 1536 return -EFAULT; 1537 1538 return 0; 1539 } 1540 1541 int 1542 xfs_ioc_swapext( 1543 xfs_swapext_t *sxp) 1544 { 1545 xfs_inode_t *ip, *tip; 1546 struct fd f, tmp; 1547 int error = 0; 1548 1549 /* Pull information for the target fd */ 1550 f = fdget((int)sxp->sx_fdtarget); 1551 if (!f.file) { 1552 error = -EINVAL; 1553 goto out; 1554 } 1555 1556 if (!(f.file->f_mode & FMODE_WRITE) || 1557 !(f.file->f_mode & FMODE_READ) || 1558 (f.file->f_flags & O_APPEND)) { 1559 error = -EBADF; 1560 goto out_put_file; 1561 } 1562 1563 tmp = fdget((int)sxp->sx_fdtmp); 1564 if (!tmp.file) { 1565 error = -EINVAL; 1566 goto out_put_file; 1567 } 1568 1569 if (!(tmp.file->f_mode & FMODE_WRITE) || 1570 !(tmp.file->f_mode & FMODE_READ) || 1571 (tmp.file->f_flags & O_APPEND)) { 1572 error = -EBADF; 1573 goto out_put_tmp_file; 1574 } 1575 1576 if (IS_SWAPFILE(file_inode(f.file)) || 1577 IS_SWAPFILE(file_inode(tmp.file))) { 1578 error = -EINVAL; 1579 goto out_put_tmp_file; 1580 } 1581 1582 /* 1583 * We need to ensure that the fds passed in point to XFS inodes 1584 * before we cast and access them as XFS structures as we have no 1585 * control over what the user passes us here. 1586 */ 1587 if (f.file->f_op != &xfs_file_operations || 1588 tmp.file->f_op != &xfs_file_operations) { 1589 error = -EINVAL; 1590 goto out_put_tmp_file; 1591 } 1592 1593 ip = XFS_I(file_inode(f.file)); 1594 tip = XFS_I(file_inode(tmp.file)); 1595 1596 if (ip->i_mount != tip->i_mount) { 1597 error = -EINVAL; 1598 goto out_put_tmp_file; 1599 } 1600 1601 if (ip->i_ino == tip->i_ino) { 1602 error = -EINVAL; 1603 goto out_put_tmp_file; 1604 } 1605 1606 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1607 error = -EIO; 1608 goto out_put_tmp_file; 1609 } 1610 1611 error = xfs_swap_extents(ip, tip, sxp); 1612 1613 out_put_tmp_file: 1614 fdput(tmp); 1615 out_put_file: 1616 fdput(f); 1617 out: 1618 return error; 1619 } 1620 1621 /* 1622 * Note: some of the ioctl's return positive numbers as a 1623 * byte count indicating success, such as readlink_by_handle. 1624 * So we don't "sign flip" like most other routines. This means 1625 * true errors need to be returned as a negative value. 1626 */ 1627 long 1628 xfs_file_ioctl( 1629 struct file *filp, 1630 unsigned int cmd, 1631 unsigned long p) 1632 { 1633 struct inode *inode = file_inode(filp); 1634 struct xfs_inode *ip = XFS_I(inode); 1635 struct xfs_mount *mp = ip->i_mount; 1636 void __user *arg = (void __user *)p; 1637 int error; 1638 1639 trace_xfs_file_ioctl(ip); 1640 1641 switch (cmd) { 1642 case FITRIM: 1643 return xfs_ioc_trim(mp, arg); 1644 case XFS_IOC_ALLOCSP: 1645 case XFS_IOC_FREESP: 1646 case XFS_IOC_RESVSP: 1647 case XFS_IOC_UNRESVSP: 1648 case XFS_IOC_ALLOCSP64: 1649 case XFS_IOC_FREESP64: 1650 case XFS_IOC_RESVSP64: 1651 case XFS_IOC_UNRESVSP64: 1652 case XFS_IOC_ZERO_RANGE: { 1653 xfs_flock64_t bf; 1654 1655 if (copy_from_user(&bf, arg, sizeof(bf))) 1656 return -EFAULT; 1657 return xfs_ioc_space(filp, cmd, &bf); 1658 } 1659 case XFS_IOC_DIOINFO: { 1660 struct dioattr da; 1661 xfs_buftarg_t *target = 1662 XFS_IS_REALTIME_INODE(ip) ? 1663 mp->m_rtdev_targp : mp->m_ddev_targp; 1664 1665 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1666 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1667 1668 if (copy_to_user(arg, &da, sizeof(da))) 1669 return -EFAULT; 1670 return 0; 1671 } 1672 1673 case XFS_IOC_FSBULKSTAT_SINGLE: 1674 case XFS_IOC_FSBULKSTAT: 1675 case XFS_IOC_FSINUMBERS: 1676 return xfs_ioc_bulkstat(mp, cmd, arg); 1677 1678 case XFS_IOC_FSGEOMETRY_V1: 1679 return xfs_ioc_fsgeometry_v1(mp, arg); 1680 1681 case XFS_IOC_FSGEOMETRY: 1682 return xfs_ioc_fsgeometry(mp, arg); 1683 1684 case XFS_IOC_GETVERSION: 1685 return put_user(inode->i_generation, (int __user *)arg); 1686 1687 case XFS_IOC_FSGETXATTR: 1688 return xfs_ioc_fsgetxattr(ip, 0, arg); 1689 case XFS_IOC_FSGETXATTRA: 1690 return xfs_ioc_fsgetxattr(ip, 1, arg); 1691 case XFS_IOC_FSSETXATTR: 1692 return xfs_ioc_fssetxattr(ip, filp, arg); 1693 case XFS_IOC_GETXFLAGS: 1694 return xfs_ioc_getxflags(ip, arg); 1695 case XFS_IOC_SETXFLAGS: 1696 return xfs_ioc_setxflags(ip, filp, arg); 1697 1698 case XFS_IOC_FSSETDM: { 1699 struct fsdmidata dmi; 1700 1701 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1702 return -EFAULT; 1703 1704 error = mnt_want_write_file(filp); 1705 if (error) 1706 return error; 1707 1708 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1709 dmi.fsd_dmstate); 1710 mnt_drop_write_file(filp); 1711 return error; 1712 } 1713 1714 case XFS_IOC_GETBMAP: 1715 case XFS_IOC_GETBMAPA: 1716 return xfs_ioc_getbmap(filp, cmd, arg); 1717 1718 case XFS_IOC_GETBMAPX: 1719 return xfs_ioc_getbmapx(ip, arg); 1720 1721 case XFS_IOC_FD_TO_HANDLE: 1722 case XFS_IOC_PATH_TO_HANDLE: 1723 case XFS_IOC_PATH_TO_FSHANDLE: { 1724 xfs_fsop_handlereq_t hreq; 1725 1726 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1727 return -EFAULT; 1728 return xfs_find_handle(cmd, &hreq); 1729 } 1730 case XFS_IOC_OPEN_BY_HANDLE: { 1731 xfs_fsop_handlereq_t hreq; 1732 1733 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1734 return -EFAULT; 1735 return xfs_open_by_handle(filp, &hreq); 1736 } 1737 case XFS_IOC_FSSETDM_BY_HANDLE: 1738 return xfs_fssetdm_by_handle(filp, arg); 1739 1740 case XFS_IOC_READLINK_BY_HANDLE: { 1741 xfs_fsop_handlereq_t hreq; 1742 1743 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1744 return -EFAULT; 1745 return xfs_readlink_by_handle(filp, &hreq); 1746 } 1747 case XFS_IOC_ATTRLIST_BY_HANDLE: 1748 return xfs_attrlist_by_handle(filp, arg); 1749 1750 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1751 return xfs_attrmulti_by_handle(filp, arg); 1752 1753 case XFS_IOC_SWAPEXT: { 1754 struct xfs_swapext sxp; 1755 1756 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1757 return -EFAULT; 1758 error = mnt_want_write_file(filp); 1759 if (error) 1760 return error; 1761 error = xfs_ioc_swapext(&sxp); 1762 mnt_drop_write_file(filp); 1763 return error; 1764 } 1765 1766 case XFS_IOC_FSCOUNTS: { 1767 xfs_fsop_counts_t out; 1768 1769 error = xfs_fs_counts(mp, &out); 1770 if (error) 1771 return error; 1772 1773 if (copy_to_user(arg, &out, sizeof(out))) 1774 return -EFAULT; 1775 return 0; 1776 } 1777 1778 case XFS_IOC_SET_RESBLKS: { 1779 xfs_fsop_resblks_t inout; 1780 __uint64_t in; 1781 1782 if (!capable(CAP_SYS_ADMIN)) 1783 return -EPERM; 1784 1785 if (mp->m_flags & XFS_MOUNT_RDONLY) 1786 return -EROFS; 1787 1788 if (copy_from_user(&inout, arg, sizeof(inout))) 1789 return -EFAULT; 1790 1791 error = mnt_want_write_file(filp); 1792 if (error) 1793 return error; 1794 1795 /* input parameter is passed in resblks field of structure */ 1796 in = inout.resblks; 1797 error = xfs_reserve_blocks(mp, &in, &inout); 1798 mnt_drop_write_file(filp); 1799 if (error) 1800 return error; 1801 1802 if (copy_to_user(arg, &inout, sizeof(inout))) 1803 return -EFAULT; 1804 return 0; 1805 } 1806 1807 case XFS_IOC_GET_RESBLKS: { 1808 xfs_fsop_resblks_t out; 1809 1810 if (!capable(CAP_SYS_ADMIN)) 1811 return -EPERM; 1812 1813 error = xfs_reserve_blocks(mp, NULL, &out); 1814 if (error) 1815 return error; 1816 1817 if (copy_to_user(arg, &out, sizeof(out))) 1818 return -EFAULT; 1819 1820 return 0; 1821 } 1822 1823 case XFS_IOC_FSGROWFSDATA: { 1824 xfs_growfs_data_t in; 1825 1826 if (copy_from_user(&in, arg, sizeof(in))) 1827 return -EFAULT; 1828 1829 error = mnt_want_write_file(filp); 1830 if (error) 1831 return error; 1832 error = xfs_growfs_data(mp, &in); 1833 mnt_drop_write_file(filp); 1834 return error; 1835 } 1836 1837 case XFS_IOC_FSGROWFSLOG: { 1838 xfs_growfs_log_t in; 1839 1840 if (copy_from_user(&in, arg, sizeof(in))) 1841 return -EFAULT; 1842 1843 error = mnt_want_write_file(filp); 1844 if (error) 1845 return error; 1846 error = xfs_growfs_log(mp, &in); 1847 mnt_drop_write_file(filp); 1848 return error; 1849 } 1850 1851 case XFS_IOC_FSGROWFSRT: { 1852 xfs_growfs_rt_t in; 1853 1854 if (copy_from_user(&in, arg, sizeof(in))) 1855 return -EFAULT; 1856 1857 error = mnt_want_write_file(filp); 1858 if (error) 1859 return error; 1860 error = xfs_growfs_rt(mp, &in); 1861 mnt_drop_write_file(filp); 1862 return error; 1863 } 1864 1865 case XFS_IOC_GOINGDOWN: { 1866 __uint32_t in; 1867 1868 if (!capable(CAP_SYS_ADMIN)) 1869 return -EPERM; 1870 1871 if (get_user(in, (__uint32_t __user *)arg)) 1872 return -EFAULT; 1873 1874 return xfs_fs_goingdown(mp, in); 1875 } 1876 1877 case XFS_IOC_ERROR_INJECTION: { 1878 xfs_error_injection_t in; 1879 1880 if (!capable(CAP_SYS_ADMIN)) 1881 return -EPERM; 1882 1883 if (copy_from_user(&in, arg, sizeof(in))) 1884 return -EFAULT; 1885 1886 return xfs_errortag_add(in.errtag, mp); 1887 } 1888 1889 case XFS_IOC_ERROR_CLEARALL: 1890 if (!capable(CAP_SYS_ADMIN)) 1891 return -EPERM; 1892 1893 return xfs_errortag_clearall(mp, 1); 1894 1895 case XFS_IOC_FREE_EOFBLOCKS: { 1896 struct xfs_fs_eofblocks eofb; 1897 struct xfs_eofblocks keofb; 1898 1899 if (!capable(CAP_SYS_ADMIN)) 1900 return -EPERM; 1901 1902 if (mp->m_flags & XFS_MOUNT_RDONLY) 1903 return -EROFS; 1904 1905 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1906 return -EFAULT; 1907 1908 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 1909 if (error) 1910 return error; 1911 1912 return xfs_icache_free_eofblocks(mp, &keofb); 1913 } 1914 1915 default: 1916 return -ENOTTY; 1917 } 1918 } 1919