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_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 = ip->i_afp->if_bytes / 914 sizeof(xfs_bmbt_rec_t); 915 else 916 fa.fsx_nextents = ip->i_d.di_anextents; 917 } else 918 fa.fsx_nextents = 0; 919 } else { 920 if (ip->i_df.if_flags & XFS_IFEXTENTS) 921 fa.fsx_nextents = ip->i_df.if_bytes / 922 sizeof(xfs_bmbt_rec_t); 923 else 924 fa.fsx_nextents = ip->i_d.di_nextents; 925 } 926 xfs_iunlock(ip, XFS_ILOCK_SHARED); 927 928 if (copy_to_user(arg, &fa, sizeof(fa))) 929 return -EFAULT; 930 return 0; 931 } 932 933 STATIC void 934 xfs_set_diflags( 935 struct xfs_inode *ip, 936 unsigned int xflags) 937 { 938 unsigned int di_flags; 939 uint64_t di_flags2; 940 941 /* can't set PREALLOC this way, just preserve it */ 942 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 943 if (xflags & FS_XFLAG_IMMUTABLE) 944 di_flags |= XFS_DIFLAG_IMMUTABLE; 945 if (xflags & FS_XFLAG_APPEND) 946 di_flags |= XFS_DIFLAG_APPEND; 947 if (xflags & FS_XFLAG_SYNC) 948 di_flags |= XFS_DIFLAG_SYNC; 949 if (xflags & FS_XFLAG_NOATIME) 950 di_flags |= XFS_DIFLAG_NOATIME; 951 if (xflags & FS_XFLAG_NODUMP) 952 di_flags |= XFS_DIFLAG_NODUMP; 953 if (xflags & FS_XFLAG_NODEFRAG) 954 di_flags |= XFS_DIFLAG_NODEFRAG; 955 if (xflags & FS_XFLAG_FILESTREAM) 956 di_flags |= XFS_DIFLAG_FILESTREAM; 957 if (S_ISDIR(VFS_I(ip)->i_mode)) { 958 if (xflags & FS_XFLAG_RTINHERIT) 959 di_flags |= XFS_DIFLAG_RTINHERIT; 960 if (xflags & FS_XFLAG_NOSYMLINKS) 961 di_flags |= XFS_DIFLAG_NOSYMLINKS; 962 if (xflags & FS_XFLAG_EXTSZINHERIT) 963 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 964 if (xflags & FS_XFLAG_PROJINHERIT) 965 di_flags |= XFS_DIFLAG_PROJINHERIT; 966 } else if (S_ISREG(VFS_I(ip)->i_mode)) { 967 if (xflags & FS_XFLAG_REALTIME) 968 di_flags |= XFS_DIFLAG_REALTIME; 969 if (xflags & FS_XFLAG_EXTSIZE) 970 di_flags |= XFS_DIFLAG_EXTSIZE; 971 } 972 ip->i_d.di_flags = di_flags; 973 974 /* diflags2 only valid for v3 inodes. */ 975 if (ip->i_d.di_version < 3) 976 return; 977 978 di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK); 979 if (xflags & FS_XFLAG_DAX) 980 di_flags2 |= XFS_DIFLAG2_DAX; 981 if (xflags & FS_XFLAG_COWEXTSIZE) 982 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE; 983 984 ip->i_d.di_flags2 = di_flags2; 985 } 986 987 STATIC void 988 xfs_diflags_to_linux( 989 struct xfs_inode *ip) 990 { 991 struct inode *inode = VFS_I(ip); 992 unsigned int xflags = xfs_ip2xflags(ip); 993 994 if (xflags & FS_XFLAG_IMMUTABLE) 995 inode->i_flags |= S_IMMUTABLE; 996 else 997 inode->i_flags &= ~S_IMMUTABLE; 998 if (xflags & FS_XFLAG_APPEND) 999 inode->i_flags |= S_APPEND; 1000 else 1001 inode->i_flags &= ~S_APPEND; 1002 if (xflags & FS_XFLAG_SYNC) 1003 inode->i_flags |= S_SYNC; 1004 else 1005 inode->i_flags &= ~S_SYNC; 1006 if (xflags & FS_XFLAG_NOATIME) 1007 inode->i_flags |= S_NOATIME; 1008 else 1009 inode->i_flags &= ~S_NOATIME; 1010 if (xflags & FS_XFLAG_DAX) 1011 inode->i_flags |= S_DAX; 1012 else 1013 inode->i_flags &= ~S_DAX; 1014 1015 } 1016 1017 static int 1018 xfs_ioctl_setattr_xflags( 1019 struct xfs_trans *tp, 1020 struct xfs_inode *ip, 1021 struct fsxattr *fa) 1022 { 1023 struct xfs_mount *mp = ip->i_mount; 1024 1025 /* Can't change realtime flag if any extents are allocated. */ 1026 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1027 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) 1028 return -EINVAL; 1029 1030 /* If realtime flag is set then must have realtime device */ 1031 if (fa->fsx_xflags & FS_XFLAG_REALTIME) { 1032 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1033 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1034 return -EINVAL; 1035 } 1036 1037 /* Clear reflink if we are actually able to set the rt flag. */ 1038 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip)) 1039 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; 1040 1041 /* Don't allow us to set DAX mode for a reflinked file for now. */ 1042 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip)) 1043 return -EINVAL; 1044 1045 /* 1046 * Can't modify an immutable/append-only file unless 1047 * we have appropriate permission. 1048 */ 1049 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) || 1050 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) && 1051 !capable(CAP_LINUX_IMMUTABLE)) 1052 return -EPERM; 1053 1054 xfs_set_diflags(ip, fa->fsx_xflags); 1055 xfs_diflags_to_linux(ip); 1056 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1057 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1058 XFS_STATS_INC(mp, xs_ig_attrchg); 1059 return 0; 1060 } 1061 1062 /* 1063 * If we are changing DAX flags, we have to ensure the file is clean and any 1064 * cached objects in the address space are invalidated and removed. This 1065 * requires us to lock out other IO and page faults similar to a truncate 1066 * operation. The locks need to be held until the transaction has been committed 1067 * so that the cache invalidation is atomic with respect to the DAX flag 1068 * manipulation. 1069 */ 1070 static int 1071 xfs_ioctl_setattr_dax_invalidate( 1072 struct xfs_inode *ip, 1073 struct fsxattr *fa, 1074 int *join_flags) 1075 { 1076 struct inode *inode = VFS_I(ip); 1077 int error; 1078 1079 *join_flags = 0; 1080 1081 /* 1082 * It is only valid to set the DAX flag on regular files and 1083 * directories on filesystems where the block size is equal to the page 1084 * size. On directories it serves as an inherit hint. 1085 */ 1086 if (fa->fsx_xflags & FS_XFLAG_DAX) { 1087 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) 1088 return -EINVAL; 1089 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE) 1090 return -EINVAL; 1091 } 1092 1093 /* If the DAX state is not changing, we have nothing to do here. */ 1094 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode)) 1095 return 0; 1096 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode)) 1097 return 0; 1098 1099 /* lock, flush and invalidate mapping in preparation for flag change */ 1100 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1101 error = filemap_write_and_wait(inode->i_mapping); 1102 if (error) 1103 goto out_unlock; 1104 error = invalidate_inode_pages2(inode->i_mapping); 1105 if (error) 1106 goto out_unlock; 1107 1108 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL; 1109 return 0; 1110 1111 out_unlock: 1112 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); 1113 return error; 1114 1115 } 1116 1117 /* 1118 * Set up the transaction structure for the setattr operation, checking that we 1119 * have permission to do so. On success, return a clean transaction and the 1120 * inode locked exclusively ready for further operation specific checks. On 1121 * failure, return an error without modifying or locking the inode. 1122 * 1123 * The inode might already be IO locked on call. If this is the case, it is 1124 * indicated in @join_flags and we take full responsibility for ensuring they 1125 * are unlocked from now on. Hence if we have an error here, we still have to 1126 * unlock them. Otherwise, once they are joined to the transaction, they will 1127 * be unlocked on commit/cancel. 1128 */ 1129 static struct xfs_trans * 1130 xfs_ioctl_setattr_get_trans( 1131 struct xfs_inode *ip, 1132 int join_flags) 1133 { 1134 struct xfs_mount *mp = ip->i_mount; 1135 struct xfs_trans *tp; 1136 int error = -EROFS; 1137 1138 if (mp->m_flags & XFS_MOUNT_RDONLY) 1139 goto out_unlock; 1140 error = -EIO; 1141 if (XFS_FORCED_SHUTDOWN(mp)) 1142 goto out_unlock; 1143 1144 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); 1145 if (error) 1146 return ERR_PTR(error); 1147 1148 xfs_ilock(ip, XFS_ILOCK_EXCL); 1149 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags); 1150 join_flags = 0; 1151 1152 /* 1153 * CAP_FOWNER overrides the following restrictions: 1154 * 1155 * The user ID of the calling process must be equal to the file owner 1156 * ID, except in cases where the CAP_FSETID capability is applicable. 1157 */ 1158 if (!inode_owner_or_capable(VFS_I(ip))) { 1159 error = -EPERM; 1160 goto out_cancel; 1161 } 1162 1163 if (mp->m_flags & XFS_MOUNT_WSYNC) 1164 xfs_trans_set_sync(tp); 1165 1166 return tp; 1167 1168 out_cancel: 1169 xfs_trans_cancel(tp); 1170 out_unlock: 1171 if (join_flags) 1172 xfs_iunlock(ip, join_flags); 1173 return ERR_PTR(error); 1174 } 1175 1176 /* 1177 * extent size hint validation is somewhat cumbersome. Rules are: 1178 * 1179 * 1. extent size hint is only valid for directories and regular files 1180 * 2. FS_XFLAG_EXTSIZE is only valid for regular files 1181 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. 1182 * 4. can only be changed on regular files if no extents are allocated 1183 * 5. can be changed on directories at any time 1184 * 6. extsize hint of 0 turns off hints, clears inode flags. 1185 * 7. Extent size must be a multiple of the appropriate block size. 1186 * 8. for non-realtime files, the extent size hint must be limited 1187 * to half the AG size to avoid alignment extending the extent beyond the 1188 * limits of the AG. 1189 */ 1190 static int 1191 xfs_ioctl_setattr_check_extsize( 1192 struct xfs_inode *ip, 1193 struct fsxattr *fa) 1194 { 1195 struct xfs_mount *mp = ip->i_mount; 1196 1197 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode)) 1198 return -EINVAL; 1199 1200 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) && 1201 !S_ISDIR(VFS_I(ip)->i_mode)) 1202 return -EINVAL; 1203 1204 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents && 1205 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1206 return -EINVAL; 1207 1208 if (fa->fsx_extsize != 0) { 1209 xfs_extlen_t size; 1210 xfs_fsblock_t extsize_fsb; 1211 1212 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1213 if (extsize_fsb > MAXEXTLEN) 1214 return -EINVAL; 1215 1216 if (XFS_IS_REALTIME_INODE(ip) || 1217 (fa->fsx_xflags & FS_XFLAG_REALTIME)) { 1218 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1219 } else { 1220 size = mp->m_sb.sb_blocksize; 1221 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1222 return -EINVAL; 1223 } 1224 1225 if (fa->fsx_extsize % size) 1226 return -EINVAL; 1227 } else 1228 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT); 1229 1230 return 0; 1231 } 1232 1233 /* 1234 * CoW extent size hint validation rules are: 1235 * 1236 * 1. CoW extent size hint can only be set if reflink is enabled on the fs. 1237 * The inode does not have to have any shared blocks, but it must be a v3. 1238 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files; 1239 * for a directory, the hint is propagated to new files. 1240 * 3. Can be changed on files & directories at any time. 1241 * 4. CoW extsize hint of 0 turns off hints, clears inode flags. 1242 * 5. Extent size must be a multiple of the appropriate block size. 1243 * 6. The extent size hint must be limited to half the AG size to avoid 1244 * alignment extending the extent beyond the limits of the AG. 1245 */ 1246 static int 1247 xfs_ioctl_setattr_check_cowextsize( 1248 struct xfs_inode *ip, 1249 struct fsxattr *fa) 1250 { 1251 struct xfs_mount *mp = ip->i_mount; 1252 1253 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE)) 1254 return 0; 1255 1256 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) || 1257 ip->i_d.di_version != 3) 1258 return -EINVAL; 1259 1260 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode)) 1261 return -EINVAL; 1262 1263 if (fa->fsx_cowextsize != 0) { 1264 xfs_extlen_t size; 1265 xfs_fsblock_t cowextsize_fsb; 1266 1267 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize); 1268 if (cowextsize_fsb > MAXEXTLEN) 1269 return -EINVAL; 1270 1271 size = mp->m_sb.sb_blocksize; 1272 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2) 1273 return -EINVAL; 1274 1275 if (fa->fsx_cowextsize % size) 1276 return -EINVAL; 1277 } else 1278 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE; 1279 1280 return 0; 1281 } 1282 1283 static int 1284 xfs_ioctl_setattr_check_projid( 1285 struct xfs_inode *ip, 1286 struct fsxattr *fa) 1287 { 1288 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1289 if (fa->fsx_projid > (__uint16_t)-1 && 1290 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1291 return -EINVAL; 1292 1293 /* 1294 * Project Quota ID state is only allowed to change from within the init 1295 * namespace. Enforce that restriction only if we are trying to change 1296 * the quota ID state. Everything else is allowed in user namespaces. 1297 */ 1298 if (current_user_ns() == &init_user_ns) 1299 return 0; 1300 1301 if (xfs_get_projid(ip) != fa->fsx_projid) 1302 return -EINVAL; 1303 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) != 1304 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)) 1305 return -EINVAL; 1306 1307 return 0; 1308 } 1309 1310 STATIC int 1311 xfs_ioctl_setattr( 1312 xfs_inode_t *ip, 1313 struct fsxattr *fa) 1314 { 1315 struct xfs_mount *mp = ip->i_mount; 1316 struct xfs_trans *tp; 1317 struct xfs_dquot *udqp = NULL; 1318 struct xfs_dquot *pdqp = NULL; 1319 struct xfs_dquot *olddquot = NULL; 1320 int code; 1321 int join_flags = 0; 1322 1323 trace_xfs_ioctl_setattr(ip); 1324 1325 code = xfs_ioctl_setattr_check_projid(ip, fa); 1326 if (code) 1327 return code; 1328 1329 /* 1330 * If disk quotas is on, we make sure that the dquots do exist on disk, 1331 * before we start any other transactions. Trying to do this later 1332 * is messy. We don't care to take a readlock to look at the ids 1333 * in inode here, because we can't hold it across the trans_reserve. 1334 * If the IDs do change before we take the ilock, we're covered 1335 * because the i_*dquot fields will get updated anyway. 1336 */ 1337 if (XFS_IS_QUOTA_ON(mp)) { 1338 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1339 ip->i_d.di_gid, fa->fsx_projid, 1340 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1341 if (code) 1342 return code; 1343 } 1344 1345 /* 1346 * Changing DAX config may require inode locking for mapping 1347 * invalidation. These need to be held all the way to transaction commit 1348 * or cancel time, so need to be passed through to 1349 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1350 * appropriately. 1351 */ 1352 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags); 1353 if (code) 1354 goto error_free_dquots; 1355 1356 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1357 if (IS_ERR(tp)) { 1358 code = PTR_ERR(tp); 1359 goto error_free_dquots; 1360 } 1361 1362 1363 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1364 xfs_get_projid(ip) != fa->fsx_projid) { 1365 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1366 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1367 if (code) /* out of quota */ 1368 goto error_trans_cancel; 1369 } 1370 1371 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1372 if (code) 1373 goto error_trans_cancel; 1374 1375 code = xfs_ioctl_setattr_check_cowextsize(ip, fa); 1376 if (code) 1377 goto error_trans_cancel; 1378 1379 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1380 if (code) 1381 goto error_trans_cancel; 1382 1383 /* 1384 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1385 * overrides the following restrictions: 1386 * 1387 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1388 * successful return from chown() 1389 */ 1390 1391 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && 1392 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1393 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); 1394 1395 /* Change the ownerships and register project quota modifications */ 1396 if (xfs_get_projid(ip) != fa->fsx_projid) { 1397 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1398 olddquot = xfs_qm_vop_chown(tp, ip, 1399 &ip->i_pdquot, pdqp); 1400 } 1401 ASSERT(ip->i_d.di_version > 1); 1402 xfs_set_projid(ip, fa->fsx_projid); 1403 } 1404 1405 /* 1406 * Only set the extent size hint if we've already determined that the 1407 * extent size hint should be set on the inode. If no extent size flags 1408 * are set on the inode then unconditionally clear the extent size hint. 1409 */ 1410 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1411 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1412 else 1413 ip->i_d.di_extsize = 0; 1414 if (ip->i_d.di_version == 3 && 1415 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE)) 1416 ip->i_d.di_cowextsize = fa->fsx_cowextsize >> 1417 mp->m_sb.sb_blocklog; 1418 else 1419 ip->i_d.di_cowextsize = 0; 1420 1421 code = xfs_trans_commit(tp); 1422 1423 /* 1424 * Release any dquot(s) the inode had kept before chown. 1425 */ 1426 xfs_qm_dqrele(olddquot); 1427 xfs_qm_dqrele(udqp); 1428 xfs_qm_dqrele(pdqp); 1429 1430 return code; 1431 1432 error_trans_cancel: 1433 xfs_trans_cancel(tp); 1434 error_free_dquots: 1435 xfs_qm_dqrele(udqp); 1436 xfs_qm_dqrele(pdqp); 1437 return code; 1438 } 1439 1440 STATIC int 1441 xfs_ioc_fssetxattr( 1442 xfs_inode_t *ip, 1443 struct file *filp, 1444 void __user *arg) 1445 { 1446 struct fsxattr fa; 1447 int error; 1448 1449 if (copy_from_user(&fa, arg, sizeof(fa))) 1450 return -EFAULT; 1451 1452 error = mnt_want_write_file(filp); 1453 if (error) 1454 return error; 1455 error = xfs_ioctl_setattr(ip, &fa); 1456 mnt_drop_write_file(filp); 1457 return error; 1458 } 1459 1460 STATIC int 1461 xfs_ioc_getxflags( 1462 xfs_inode_t *ip, 1463 void __user *arg) 1464 { 1465 unsigned int flags; 1466 1467 flags = xfs_di2lxflags(ip->i_d.di_flags); 1468 if (copy_to_user(arg, &flags, sizeof(flags))) 1469 return -EFAULT; 1470 return 0; 1471 } 1472 1473 STATIC int 1474 xfs_ioc_setxflags( 1475 struct xfs_inode *ip, 1476 struct file *filp, 1477 void __user *arg) 1478 { 1479 struct xfs_trans *tp; 1480 struct fsxattr fa; 1481 unsigned int flags; 1482 int join_flags = 0; 1483 int error; 1484 1485 if (copy_from_user(&flags, arg, sizeof(flags))) 1486 return -EFAULT; 1487 1488 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1489 FS_NOATIME_FL | FS_NODUMP_FL | \ 1490 FS_SYNC_FL)) 1491 return -EOPNOTSUPP; 1492 1493 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1494 1495 error = mnt_want_write_file(filp); 1496 if (error) 1497 return error; 1498 1499 /* 1500 * Changing DAX config may require inode locking for mapping 1501 * invalidation. These need to be held all the way to transaction commit 1502 * or cancel time, so need to be passed through to 1503 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call 1504 * appropriately. 1505 */ 1506 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags); 1507 if (error) 1508 goto out_drop_write; 1509 1510 tp = xfs_ioctl_setattr_get_trans(ip, join_flags); 1511 if (IS_ERR(tp)) { 1512 error = PTR_ERR(tp); 1513 goto out_drop_write; 1514 } 1515 1516 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1517 if (error) { 1518 xfs_trans_cancel(tp); 1519 goto out_drop_write; 1520 } 1521 1522 error = xfs_trans_commit(tp); 1523 out_drop_write: 1524 mnt_drop_write_file(filp); 1525 return error; 1526 } 1527 1528 STATIC int 1529 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) 1530 { 1531 struct getbmap __user *base = (struct getbmap __user *)*ap; 1532 1533 /* copy only getbmap portion (not getbmapx) */ 1534 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1535 return -EFAULT; 1536 1537 *ap += sizeof(struct getbmap); 1538 return 0; 1539 } 1540 1541 STATIC int 1542 xfs_ioc_getbmap( 1543 struct file *file, 1544 unsigned int cmd, 1545 void __user *arg) 1546 { 1547 struct getbmapx bmx; 1548 int error; 1549 1550 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) 1551 return -EFAULT; 1552 1553 if (bmx.bmv_count < 2) 1554 return -EINVAL; 1555 1556 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1557 if (file->f_mode & FMODE_NOCMTIME) 1558 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1559 1560 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format, 1561 (__force struct getbmap *)arg+1); 1562 if (error) 1563 return error; 1564 1565 /* copy back header - only size of getbmap */ 1566 if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) 1567 return -EFAULT; 1568 return 0; 1569 } 1570 1571 STATIC int 1572 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) 1573 { 1574 struct getbmapx __user *base = (struct getbmapx __user *)*ap; 1575 1576 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1577 return -EFAULT; 1578 1579 *ap += sizeof(struct getbmapx); 1580 return 0; 1581 } 1582 1583 STATIC int 1584 xfs_ioc_getbmapx( 1585 struct xfs_inode *ip, 1586 void __user *arg) 1587 { 1588 struct getbmapx bmx; 1589 int error; 1590 1591 if (copy_from_user(&bmx, arg, sizeof(bmx))) 1592 return -EFAULT; 1593 1594 if (bmx.bmv_count < 2) 1595 return -EINVAL; 1596 1597 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1598 return -EINVAL; 1599 1600 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1601 (__force struct getbmapx *)arg+1); 1602 if (error) 1603 return error; 1604 1605 /* copy back header */ 1606 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) 1607 return -EFAULT; 1608 1609 return 0; 1610 } 1611 1612 int 1613 xfs_ioc_swapext( 1614 xfs_swapext_t *sxp) 1615 { 1616 xfs_inode_t *ip, *tip; 1617 struct fd f, tmp; 1618 int error = 0; 1619 1620 /* Pull information for the target fd */ 1621 f = fdget((int)sxp->sx_fdtarget); 1622 if (!f.file) { 1623 error = -EINVAL; 1624 goto out; 1625 } 1626 1627 if (!(f.file->f_mode & FMODE_WRITE) || 1628 !(f.file->f_mode & FMODE_READ) || 1629 (f.file->f_flags & O_APPEND)) { 1630 error = -EBADF; 1631 goto out_put_file; 1632 } 1633 1634 tmp = fdget((int)sxp->sx_fdtmp); 1635 if (!tmp.file) { 1636 error = -EINVAL; 1637 goto out_put_file; 1638 } 1639 1640 if (!(tmp.file->f_mode & FMODE_WRITE) || 1641 !(tmp.file->f_mode & FMODE_READ) || 1642 (tmp.file->f_flags & O_APPEND)) { 1643 error = -EBADF; 1644 goto out_put_tmp_file; 1645 } 1646 1647 if (IS_SWAPFILE(file_inode(f.file)) || 1648 IS_SWAPFILE(file_inode(tmp.file))) { 1649 error = -EINVAL; 1650 goto out_put_tmp_file; 1651 } 1652 1653 /* 1654 * We need to ensure that the fds passed in point to XFS inodes 1655 * before we cast and access them as XFS structures as we have no 1656 * control over what the user passes us here. 1657 */ 1658 if (f.file->f_op != &xfs_file_operations || 1659 tmp.file->f_op != &xfs_file_operations) { 1660 error = -EINVAL; 1661 goto out_put_tmp_file; 1662 } 1663 1664 ip = XFS_I(file_inode(f.file)); 1665 tip = XFS_I(file_inode(tmp.file)); 1666 1667 if (ip->i_mount != tip->i_mount) { 1668 error = -EINVAL; 1669 goto out_put_tmp_file; 1670 } 1671 1672 if (ip->i_ino == tip->i_ino) { 1673 error = -EINVAL; 1674 goto out_put_tmp_file; 1675 } 1676 1677 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1678 error = -EIO; 1679 goto out_put_tmp_file; 1680 } 1681 1682 error = xfs_swap_extents(ip, tip, sxp); 1683 1684 out_put_tmp_file: 1685 fdput(tmp); 1686 out_put_file: 1687 fdput(f); 1688 out: 1689 return error; 1690 } 1691 1692 /* 1693 * Note: some of the ioctl's return positive numbers as a 1694 * byte count indicating success, such as readlink_by_handle. 1695 * So we don't "sign flip" like most other routines. This means 1696 * true errors need to be returned as a negative value. 1697 */ 1698 long 1699 xfs_file_ioctl( 1700 struct file *filp, 1701 unsigned int cmd, 1702 unsigned long p) 1703 { 1704 struct inode *inode = file_inode(filp); 1705 struct xfs_inode *ip = XFS_I(inode); 1706 struct xfs_mount *mp = ip->i_mount; 1707 void __user *arg = (void __user *)p; 1708 int error; 1709 1710 trace_xfs_file_ioctl(ip); 1711 1712 switch (cmd) { 1713 case FITRIM: 1714 return xfs_ioc_trim(mp, arg); 1715 case XFS_IOC_ALLOCSP: 1716 case XFS_IOC_FREESP: 1717 case XFS_IOC_RESVSP: 1718 case XFS_IOC_UNRESVSP: 1719 case XFS_IOC_ALLOCSP64: 1720 case XFS_IOC_FREESP64: 1721 case XFS_IOC_RESVSP64: 1722 case XFS_IOC_UNRESVSP64: 1723 case XFS_IOC_ZERO_RANGE: { 1724 xfs_flock64_t bf; 1725 1726 if (copy_from_user(&bf, arg, sizeof(bf))) 1727 return -EFAULT; 1728 return xfs_ioc_space(filp, cmd, &bf); 1729 } 1730 case XFS_IOC_DIOINFO: { 1731 struct dioattr da; 1732 xfs_buftarg_t *target = 1733 XFS_IS_REALTIME_INODE(ip) ? 1734 mp->m_rtdev_targp : mp->m_ddev_targp; 1735 1736 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1737 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1738 1739 if (copy_to_user(arg, &da, sizeof(da))) 1740 return -EFAULT; 1741 return 0; 1742 } 1743 1744 case XFS_IOC_FSBULKSTAT_SINGLE: 1745 case XFS_IOC_FSBULKSTAT: 1746 case XFS_IOC_FSINUMBERS: 1747 return xfs_ioc_bulkstat(mp, cmd, arg); 1748 1749 case XFS_IOC_FSGEOMETRY_V1: 1750 return xfs_ioc_fsgeometry_v1(mp, arg); 1751 1752 case XFS_IOC_FSGEOMETRY: 1753 return xfs_ioc_fsgeometry(mp, arg); 1754 1755 case XFS_IOC_GETVERSION: 1756 return put_user(inode->i_generation, (int __user *)arg); 1757 1758 case XFS_IOC_FSGETXATTR: 1759 return xfs_ioc_fsgetxattr(ip, 0, arg); 1760 case XFS_IOC_FSGETXATTRA: 1761 return xfs_ioc_fsgetxattr(ip, 1, arg); 1762 case XFS_IOC_FSSETXATTR: 1763 return xfs_ioc_fssetxattr(ip, filp, arg); 1764 case XFS_IOC_GETXFLAGS: 1765 return xfs_ioc_getxflags(ip, arg); 1766 case XFS_IOC_SETXFLAGS: 1767 return xfs_ioc_setxflags(ip, filp, arg); 1768 1769 case XFS_IOC_FSSETDM: { 1770 struct fsdmidata dmi; 1771 1772 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1773 return -EFAULT; 1774 1775 error = mnt_want_write_file(filp); 1776 if (error) 1777 return error; 1778 1779 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1780 dmi.fsd_dmstate); 1781 mnt_drop_write_file(filp); 1782 return error; 1783 } 1784 1785 case XFS_IOC_GETBMAP: 1786 case XFS_IOC_GETBMAPA: 1787 return xfs_ioc_getbmap(filp, cmd, arg); 1788 1789 case XFS_IOC_GETBMAPX: 1790 return xfs_ioc_getbmapx(ip, arg); 1791 1792 case XFS_IOC_FD_TO_HANDLE: 1793 case XFS_IOC_PATH_TO_HANDLE: 1794 case XFS_IOC_PATH_TO_FSHANDLE: { 1795 xfs_fsop_handlereq_t hreq; 1796 1797 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1798 return -EFAULT; 1799 return xfs_find_handle(cmd, &hreq); 1800 } 1801 case XFS_IOC_OPEN_BY_HANDLE: { 1802 xfs_fsop_handlereq_t hreq; 1803 1804 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1805 return -EFAULT; 1806 return xfs_open_by_handle(filp, &hreq); 1807 } 1808 case XFS_IOC_FSSETDM_BY_HANDLE: 1809 return xfs_fssetdm_by_handle(filp, arg); 1810 1811 case XFS_IOC_READLINK_BY_HANDLE: { 1812 xfs_fsop_handlereq_t hreq; 1813 1814 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1815 return -EFAULT; 1816 return xfs_readlink_by_handle(filp, &hreq); 1817 } 1818 case XFS_IOC_ATTRLIST_BY_HANDLE: 1819 return xfs_attrlist_by_handle(filp, arg); 1820 1821 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1822 return xfs_attrmulti_by_handle(filp, arg); 1823 1824 case XFS_IOC_SWAPEXT: { 1825 struct xfs_swapext sxp; 1826 1827 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1828 return -EFAULT; 1829 error = mnt_want_write_file(filp); 1830 if (error) 1831 return error; 1832 error = xfs_ioc_swapext(&sxp); 1833 mnt_drop_write_file(filp); 1834 return error; 1835 } 1836 1837 case XFS_IOC_FSCOUNTS: { 1838 xfs_fsop_counts_t out; 1839 1840 error = xfs_fs_counts(mp, &out); 1841 if (error) 1842 return error; 1843 1844 if (copy_to_user(arg, &out, sizeof(out))) 1845 return -EFAULT; 1846 return 0; 1847 } 1848 1849 case XFS_IOC_SET_RESBLKS: { 1850 xfs_fsop_resblks_t inout; 1851 __uint64_t in; 1852 1853 if (!capable(CAP_SYS_ADMIN)) 1854 return -EPERM; 1855 1856 if (mp->m_flags & XFS_MOUNT_RDONLY) 1857 return -EROFS; 1858 1859 if (copy_from_user(&inout, arg, sizeof(inout))) 1860 return -EFAULT; 1861 1862 error = mnt_want_write_file(filp); 1863 if (error) 1864 return error; 1865 1866 /* input parameter is passed in resblks field of structure */ 1867 in = inout.resblks; 1868 error = xfs_reserve_blocks(mp, &in, &inout); 1869 mnt_drop_write_file(filp); 1870 if (error) 1871 return error; 1872 1873 if (copy_to_user(arg, &inout, sizeof(inout))) 1874 return -EFAULT; 1875 return 0; 1876 } 1877 1878 case XFS_IOC_GET_RESBLKS: { 1879 xfs_fsop_resblks_t out; 1880 1881 if (!capable(CAP_SYS_ADMIN)) 1882 return -EPERM; 1883 1884 error = xfs_reserve_blocks(mp, NULL, &out); 1885 if (error) 1886 return error; 1887 1888 if (copy_to_user(arg, &out, sizeof(out))) 1889 return -EFAULT; 1890 1891 return 0; 1892 } 1893 1894 case XFS_IOC_FSGROWFSDATA: { 1895 xfs_growfs_data_t in; 1896 1897 if (copy_from_user(&in, arg, sizeof(in))) 1898 return -EFAULT; 1899 1900 error = mnt_want_write_file(filp); 1901 if (error) 1902 return error; 1903 error = xfs_growfs_data(mp, &in); 1904 mnt_drop_write_file(filp); 1905 return error; 1906 } 1907 1908 case XFS_IOC_FSGROWFSLOG: { 1909 xfs_growfs_log_t in; 1910 1911 if (copy_from_user(&in, arg, sizeof(in))) 1912 return -EFAULT; 1913 1914 error = mnt_want_write_file(filp); 1915 if (error) 1916 return error; 1917 error = xfs_growfs_log(mp, &in); 1918 mnt_drop_write_file(filp); 1919 return error; 1920 } 1921 1922 case XFS_IOC_FSGROWFSRT: { 1923 xfs_growfs_rt_t in; 1924 1925 if (copy_from_user(&in, arg, sizeof(in))) 1926 return -EFAULT; 1927 1928 error = mnt_want_write_file(filp); 1929 if (error) 1930 return error; 1931 error = xfs_growfs_rt(mp, &in); 1932 mnt_drop_write_file(filp); 1933 return error; 1934 } 1935 1936 case XFS_IOC_GOINGDOWN: { 1937 __uint32_t in; 1938 1939 if (!capable(CAP_SYS_ADMIN)) 1940 return -EPERM; 1941 1942 if (get_user(in, (__uint32_t __user *)arg)) 1943 return -EFAULT; 1944 1945 return xfs_fs_goingdown(mp, in); 1946 } 1947 1948 case XFS_IOC_ERROR_INJECTION: { 1949 xfs_error_injection_t in; 1950 1951 if (!capable(CAP_SYS_ADMIN)) 1952 return -EPERM; 1953 1954 if (copy_from_user(&in, arg, sizeof(in))) 1955 return -EFAULT; 1956 1957 return xfs_errortag_add(in.errtag, mp); 1958 } 1959 1960 case XFS_IOC_ERROR_CLEARALL: 1961 if (!capable(CAP_SYS_ADMIN)) 1962 return -EPERM; 1963 1964 return xfs_errortag_clearall(mp, 1); 1965 1966 case XFS_IOC_FREE_EOFBLOCKS: { 1967 struct xfs_fs_eofblocks eofb; 1968 struct xfs_eofblocks keofb; 1969 1970 if (!capable(CAP_SYS_ADMIN)) 1971 return -EPERM; 1972 1973 if (mp->m_flags & XFS_MOUNT_RDONLY) 1974 return -EROFS; 1975 1976 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1977 return -EFAULT; 1978 1979 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 1980 if (error) 1981 return error; 1982 1983 return xfs_icache_free_eofblocks(mp, &keofb); 1984 } 1985 1986 default: 1987 return -ENOTTY; 1988 } 1989 } 1990