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 44#include <linux/capability.h> 45#include <linux/dcache.h> 46#include <linux/mount.h> 47#include <linux/namei.h> 48#include <linux/pagemap.h> 49#include <linux/slab.h> 50#include <linux/exportfs.h> 51 52/* 53 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to 54 * a file or fs handle. 55 * 56 * XFS_IOC_PATH_TO_FSHANDLE 57 * returns fs handle for a mount point or path within that mount point 58 * XFS_IOC_FD_TO_HANDLE 59 * returns full handle for a FD opened in user space 60 * XFS_IOC_PATH_TO_HANDLE 61 * returns full handle for a path 62 */ 63int 64xfs_find_handle( 65 unsigned int cmd, 66 xfs_fsop_handlereq_t *hreq) 67{ 68 int hsize; 69 xfs_handle_t handle; 70 struct inode *inode; 71 struct fd f = {NULL}; 72 struct path path; 73 int error; 74 struct xfs_inode *ip; 75 76 if (cmd == XFS_IOC_FD_TO_HANDLE) { 77 f = fdget(hreq->fd); 78 if (!f.file) 79 return -EBADF; 80 inode = file_inode(f.file); 81 } else { 82 error = user_lpath((const char __user *)hreq->path, &path); 83 if (error) 84 return error; 85 inode = d_inode(path.dentry); 86 } 87 ip = XFS_I(inode); 88 89 /* 90 * We can only generate handles for inodes residing on a XFS filesystem, 91 * and only for regular files, directories or symbolic links. 92 */ 93 error = -EINVAL; 94 if (inode->i_sb->s_magic != XFS_SB_MAGIC) 95 goto out_put; 96 97 error = -EBADF; 98 if (!S_ISREG(inode->i_mode) && 99 !S_ISDIR(inode->i_mode) && 100 !S_ISLNK(inode->i_mode)) 101 goto out_put; 102 103 104 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); 105 106 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { 107 /* 108 * This handle only contains an fsid, zero the rest. 109 */ 110 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); 111 hsize = sizeof(xfs_fsid_t); 112 } else { 113 handle.ha_fid.fid_len = sizeof(xfs_fid_t) - 114 sizeof(handle.ha_fid.fid_len); 115 handle.ha_fid.fid_pad = 0; 116 handle.ha_fid.fid_gen = ip->i_d.di_gen; 117 handle.ha_fid.fid_ino = ip->i_ino; 118 119 hsize = XFS_HSIZE(handle); 120 } 121 122 error = -EFAULT; 123 if (copy_to_user(hreq->ohandle, &handle, hsize) || 124 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) 125 goto out_put; 126 127 error = 0; 128 129 out_put: 130 if (cmd == XFS_IOC_FD_TO_HANDLE) 131 fdput(f); 132 else 133 path_put(&path); 134 return error; 135} 136 137/* 138 * No need to do permission checks on the various pathname components 139 * as the handle operations are privileged. 140 */ 141STATIC int 142xfs_handle_acceptable( 143 void *context, 144 struct dentry *dentry) 145{ 146 return 1; 147} 148 149/* 150 * Convert userspace handle data into a dentry. 151 */ 152struct dentry * 153xfs_handle_to_dentry( 154 struct file *parfilp, 155 void __user *uhandle, 156 u32 hlen) 157{ 158 xfs_handle_t handle; 159 struct xfs_fid64 fid; 160 161 /* 162 * Only allow handle opens under a directory. 163 */ 164 if (!S_ISDIR(file_inode(parfilp)->i_mode)) 165 return ERR_PTR(-ENOTDIR); 166 167 if (hlen != sizeof(xfs_handle_t)) 168 return ERR_PTR(-EINVAL); 169 if (copy_from_user(&handle, uhandle, hlen)) 170 return ERR_PTR(-EFAULT); 171 if (handle.ha_fid.fid_len != 172 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) 173 return ERR_PTR(-EINVAL); 174 175 memset(&fid, 0, sizeof(struct fid)); 176 fid.ino = handle.ha_fid.fid_ino; 177 fid.gen = handle.ha_fid.fid_gen; 178 179 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, 180 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, 181 xfs_handle_acceptable, NULL); 182} 183 184STATIC struct dentry * 185xfs_handlereq_to_dentry( 186 struct file *parfilp, 187 xfs_fsop_handlereq_t *hreq) 188{ 189 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); 190} 191 192int 193xfs_open_by_handle( 194 struct file *parfilp, 195 xfs_fsop_handlereq_t *hreq) 196{ 197 const struct cred *cred = current_cred(); 198 int error; 199 int fd; 200 int permflag; 201 struct file *filp; 202 struct inode *inode; 203 struct dentry *dentry; 204 fmode_t fmode; 205 struct path path; 206 207 if (!capable(CAP_SYS_ADMIN)) 208 return -EPERM; 209 210 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 211 if (IS_ERR(dentry)) 212 return PTR_ERR(dentry); 213 inode = d_inode(dentry); 214 215 /* Restrict xfs_open_by_handle to directories & regular files. */ 216 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { 217 error = -EPERM; 218 goto out_dput; 219 } 220 221#if BITS_PER_LONG != 32 222 hreq->oflags |= O_LARGEFILE; 223#endif 224 225 permflag = hreq->oflags; 226 fmode = OPEN_FMODE(permflag); 227 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && 228 (fmode & FMODE_WRITE) && IS_APPEND(inode)) { 229 error = -EPERM; 230 goto out_dput; 231 } 232 233 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { 234 error = -EACCES; 235 goto out_dput; 236 } 237 238 /* Can't write directories. */ 239 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { 240 error = -EISDIR; 241 goto out_dput; 242 } 243 244 fd = get_unused_fd_flags(0); 245 if (fd < 0) { 246 error = fd; 247 goto out_dput; 248 } 249 250 path.mnt = parfilp->f_path.mnt; 251 path.dentry = dentry; 252 filp = dentry_open(&path, hreq->oflags, cred); 253 dput(dentry); 254 if (IS_ERR(filp)) { 255 put_unused_fd(fd); 256 return PTR_ERR(filp); 257 } 258 259 if (S_ISREG(inode->i_mode)) { 260 filp->f_flags |= O_NOATIME; 261 filp->f_mode |= FMODE_NOCMTIME; 262 } 263 264 fd_install(fd, filp); 265 return fd; 266 267 out_dput: 268 dput(dentry); 269 return error; 270} 271 272int 273xfs_readlink_by_handle( 274 struct file *parfilp, 275 xfs_fsop_handlereq_t *hreq) 276{ 277 struct dentry *dentry; 278 __u32 olen; 279 void *link; 280 int error; 281 282 if (!capable(CAP_SYS_ADMIN)) 283 return -EPERM; 284 285 dentry = xfs_handlereq_to_dentry(parfilp, hreq); 286 if (IS_ERR(dentry)) 287 return PTR_ERR(dentry); 288 289 /* Restrict this handle operation to symlinks only. */ 290 if (!d_is_symlink(dentry)) { 291 error = -EINVAL; 292 goto out_dput; 293 } 294 295 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { 296 error = -EFAULT; 297 goto out_dput; 298 } 299 300 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); 301 if (!link) { 302 error = -ENOMEM; 303 goto out_dput; 304 } 305 306 error = xfs_readlink(XFS_I(d_inode(dentry)), link); 307 if (error) 308 goto out_kfree; 309 error = readlink_copy(hreq->ohandle, olen, link); 310 if (error) 311 goto out_kfree; 312 313 out_kfree: 314 kfree(link); 315 out_dput: 316 dput(dentry); 317 return error; 318} 319 320int 321xfs_set_dmattrs( 322 xfs_inode_t *ip, 323 u_int evmask, 324 u_int16_t state) 325{ 326 xfs_mount_t *mp = ip->i_mount; 327 xfs_trans_t *tp; 328 int error; 329 330 if (!capable(CAP_SYS_ADMIN)) 331 return -EPERM; 332 333 if (XFS_FORCED_SHUTDOWN(mp)) 334 return -EIO; 335 336 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); 337 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); 338 if (error) { 339 xfs_trans_cancel(tp, 0); 340 return error; 341 } 342 xfs_ilock(ip, XFS_ILOCK_EXCL); 343 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 344 345 ip->i_d.di_dmevmask = evmask; 346 ip->i_d.di_dmstate = state; 347 348 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 349 error = xfs_trans_commit(tp, 0); 350 351 return error; 352} 353 354STATIC int 355xfs_fssetdm_by_handle( 356 struct file *parfilp, 357 void __user *arg) 358{ 359 int error; 360 struct fsdmidata fsd; 361 xfs_fsop_setdm_handlereq_t dmhreq; 362 struct dentry *dentry; 363 364 if (!capable(CAP_MKNOD)) 365 return -EPERM; 366 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) 367 return -EFAULT; 368 369 error = mnt_want_write_file(parfilp); 370 if (error) 371 return error; 372 373 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); 374 if (IS_ERR(dentry)) { 375 mnt_drop_write_file(parfilp); 376 return PTR_ERR(dentry); 377 } 378 379 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) { 380 error = -EPERM; 381 goto out; 382 } 383 384 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { 385 error = -EFAULT; 386 goto out; 387 } 388 389 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask, 390 fsd.fsd_dmstate); 391 392 out: 393 mnt_drop_write_file(parfilp); 394 dput(dentry); 395 return error; 396} 397 398STATIC int 399xfs_attrlist_by_handle( 400 struct file *parfilp, 401 void __user *arg) 402{ 403 int error = -ENOMEM; 404 attrlist_cursor_kern_t *cursor; 405 xfs_fsop_attrlist_handlereq_t al_hreq; 406 struct dentry *dentry; 407 char *kbuf; 408 409 if (!capable(CAP_SYS_ADMIN)) 410 return -EPERM; 411 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) 412 return -EFAULT; 413 if (al_hreq.buflen < sizeof(struct attrlist) || 414 al_hreq.buflen > XATTR_LIST_MAX) 415 return -EINVAL; 416 417 /* 418 * Reject flags, only allow namespaces. 419 */ 420 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) 421 return -EINVAL; 422 423 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); 424 if (IS_ERR(dentry)) 425 return PTR_ERR(dentry); 426 427 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); 428 if (!kbuf) 429 goto out_dput; 430 431 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; 432 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen, 433 al_hreq.flags, cursor); 434 if (error) 435 goto out_kfree; 436 437 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) 438 error = -EFAULT; 439 440out_kfree: 441 kmem_free(kbuf); 442out_dput: 443 dput(dentry); 444 return error; 445} 446 447int 448xfs_attrmulti_attr_get( 449 struct inode *inode, 450 unsigned char *name, 451 unsigned char __user *ubuf, 452 __uint32_t *len, 453 __uint32_t flags) 454{ 455 unsigned char *kbuf; 456 int error = -EFAULT; 457 458 if (*len > XATTR_SIZE_MAX) 459 return -EINVAL; 460 kbuf = kmem_zalloc_large(*len, KM_SLEEP); 461 if (!kbuf) 462 return -ENOMEM; 463 464 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); 465 if (error) 466 goto out_kfree; 467 468 if (copy_to_user(ubuf, kbuf, *len)) 469 error = -EFAULT; 470 471out_kfree: 472 kmem_free(kbuf); 473 return error; 474} 475 476int 477xfs_attrmulti_attr_set( 478 struct inode *inode, 479 unsigned char *name, 480 const unsigned char __user *ubuf, 481 __uint32_t len, 482 __uint32_t flags) 483{ 484 unsigned char *kbuf; 485 486 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 487 return -EPERM; 488 if (len > XATTR_SIZE_MAX) 489 return -EINVAL; 490 491 kbuf = memdup_user(ubuf, len); 492 if (IS_ERR(kbuf)) 493 return PTR_ERR(kbuf); 494 495 return xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); 496} 497 498int 499xfs_attrmulti_attr_remove( 500 struct inode *inode, 501 unsigned char *name, 502 __uint32_t flags) 503{ 504 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 505 return -EPERM; 506 return xfs_attr_remove(XFS_I(inode), name, flags); 507} 508 509STATIC int 510xfs_attrmulti_by_handle( 511 struct file *parfilp, 512 void __user *arg) 513{ 514 int error; 515 xfs_attr_multiop_t *ops; 516 xfs_fsop_attrmulti_handlereq_t am_hreq; 517 struct dentry *dentry; 518 unsigned int i, size; 519 unsigned char *attr_name; 520 521 if (!capable(CAP_SYS_ADMIN)) 522 return -EPERM; 523 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) 524 return -EFAULT; 525 526 /* overflow check */ 527 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) 528 return -E2BIG; 529 530 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); 531 if (IS_ERR(dentry)) 532 return PTR_ERR(dentry); 533 534 error = -E2BIG; 535 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); 536 if (!size || size > 16 * PAGE_SIZE) 537 goto out_dput; 538 539 ops = memdup_user(am_hreq.ops, size); 540 if (IS_ERR(ops)) { 541 error = PTR_ERR(ops); 542 goto out_dput; 543 } 544 545 error = -ENOMEM; 546 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); 547 if (!attr_name) 548 goto out_kfree_ops; 549 550 error = 0; 551 for (i = 0; i < am_hreq.opcount; i++) { 552 ops[i].am_error = strncpy_from_user((char *)attr_name, 553 ops[i].am_attrname, MAXNAMELEN); 554 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) 555 error = -ERANGE; 556 if (ops[i].am_error < 0) 557 break; 558 559 switch (ops[i].am_opcode) { 560 case ATTR_OP_GET: 561 ops[i].am_error = xfs_attrmulti_attr_get( 562 d_inode(dentry), attr_name, 563 ops[i].am_attrvalue, &ops[i].am_length, 564 ops[i].am_flags); 565 break; 566 case ATTR_OP_SET: 567 ops[i].am_error = mnt_want_write_file(parfilp); 568 if (ops[i].am_error) 569 break; 570 ops[i].am_error = xfs_attrmulti_attr_set( 571 d_inode(dentry), attr_name, 572 ops[i].am_attrvalue, ops[i].am_length, 573 ops[i].am_flags); 574 mnt_drop_write_file(parfilp); 575 break; 576 case ATTR_OP_REMOVE: 577 ops[i].am_error = mnt_want_write_file(parfilp); 578 if (ops[i].am_error) 579 break; 580 ops[i].am_error = xfs_attrmulti_attr_remove( 581 d_inode(dentry), attr_name, 582 ops[i].am_flags); 583 mnt_drop_write_file(parfilp); 584 break; 585 default: 586 ops[i].am_error = -EINVAL; 587 } 588 } 589 590 if (copy_to_user(am_hreq.ops, ops, size)) 591 error = -EFAULT; 592 593 kfree(attr_name); 594 out_kfree_ops: 595 kfree(ops); 596 out_dput: 597 dput(dentry); 598 return error; 599} 600 601int 602xfs_ioc_space( 603 struct xfs_inode *ip, 604 struct inode *inode, 605 struct file *filp, 606 int ioflags, 607 unsigned int cmd, 608 xfs_flock64_t *bf) 609{ 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 (ioflags & XFS_IO_INVIS) 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 735out_unlock: 736 xfs_iunlock(ip, iolock); 737 mnt_drop_write_file(filp); 738 return error; 739} 740 741STATIC int 742xfs_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 800STATIC int 801xfs_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 822STATIC int 823xfs_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 843STATIC unsigned int 844xfs_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 |= XFS_XFLAG_IMMUTABLE; 852 else 853 xflags &= ~XFS_XFLAG_IMMUTABLE; 854 if (flags & FS_APPEND_FL) 855 xflags |= XFS_XFLAG_APPEND; 856 else 857 xflags &= ~XFS_XFLAG_APPEND; 858 if (flags & FS_SYNC_FL) 859 xflags |= XFS_XFLAG_SYNC; 860 else 861 xflags &= ~XFS_XFLAG_SYNC; 862 if (flags & FS_NOATIME_FL) 863 xflags |= XFS_XFLAG_NOATIME; 864 else 865 xflags &= ~XFS_XFLAG_NOATIME; 866 if (flags & FS_NODUMP_FL) 867 xflags |= XFS_XFLAG_NODUMP; 868 else 869 xflags &= ~XFS_XFLAG_NODUMP; 870 871 return xflags; 872} 873 874STATIC unsigned int 875xfs_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 893STATIC int 894xfs_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 931STATIC void 932xfs_set_diflags( 933 struct xfs_inode *ip, 934 unsigned int xflags) 935{ 936 unsigned int di_flags; 937 938 /* can't set PREALLOC this way, just preserve it */ 939 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); 940 if (xflags & XFS_XFLAG_IMMUTABLE) 941 di_flags |= XFS_DIFLAG_IMMUTABLE; 942 if (xflags & XFS_XFLAG_APPEND) 943 di_flags |= XFS_DIFLAG_APPEND; 944 if (xflags & XFS_XFLAG_SYNC) 945 di_flags |= XFS_DIFLAG_SYNC; 946 if (xflags & XFS_XFLAG_NOATIME) 947 di_flags |= XFS_DIFLAG_NOATIME; 948 if (xflags & XFS_XFLAG_NODUMP) 949 di_flags |= XFS_DIFLAG_NODUMP; 950 if (xflags & XFS_XFLAG_NODEFRAG) 951 di_flags |= XFS_DIFLAG_NODEFRAG; 952 if (xflags & XFS_XFLAG_FILESTREAM) 953 di_flags |= XFS_DIFLAG_FILESTREAM; 954 if (S_ISDIR(ip->i_d.di_mode)) { 955 if (xflags & XFS_XFLAG_RTINHERIT) 956 di_flags |= XFS_DIFLAG_RTINHERIT; 957 if (xflags & XFS_XFLAG_NOSYMLINKS) 958 di_flags |= XFS_DIFLAG_NOSYMLINKS; 959 if (xflags & XFS_XFLAG_EXTSZINHERIT) 960 di_flags |= XFS_DIFLAG_EXTSZINHERIT; 961 if (xflags & XFS_XFLAG_PROJINHERIT) 962 di_flags |= XFS_DIFLAG_PROJINHERIT; 963 } else if (S_ISREG(ip->i_d.di_mode)) { 964 if (xflags & XFS_XFLAG_REALTIME) 965 di_flags |= XFS_DIFLAG_REALTIME; 966 if (xflags & XFS_XFLAG_EXTSIZE) 967 di_flags |= XFS_DIFLAG_EXTSIZE; 968 } 969 970 ip->i_d.di_flags = di_flags; 971} 972 973STATIC void 974xfs_diflags_to_linux( 975 struct xfs_inode *ip) 976{ 977 struct inode *inode = VFS_I(ip); 978 unsigned int xflags = xfs_ip2xflags(ip); 979 980 if (xflags & XFS_XFLAG_IMMUTABLE) 981 inode->i_flags |= S_IMMUTABLE; 982 else 983 inode->i_flags &= ~S_IMMUTABLE; 984 if (xflags & XFS_XFLAG_APPEND) 985 inode->i_flags |= S_APPEND; 986 else 987 inode->i_flags &= ~S_APPEND; 988 if (xflags & XFS_XFLAG_SYNC) 989 inode->i_flags |= S_SYNC; 990 else 991 inode->i_flags &= ~S_SYNC; 992 if (xflags & XFS_XFLAG_NOATIME) 993 inode->i_flags |= S_NOATIME; 994 else 995 inode->i_flags &= ~S_NOATIME; 996} 997 998static int 999xfs_ioctl_setattr_xflags( 1000 struct xfs_trans *tp, 1001 struct xfs_inode *ip, 1002 struct fsxattr *fa) 1003{ 1004 struct xfs_mount *mp = ip->i_mount; 1005 1006 /* Can't change realtime flag if any extents are allocated. */ 1007 if ((ip->i_d.di_nextents || ip->i_delayed_blks) && 1008 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & XFS_XFLAG_REALTIME)) 1009 return -EINVAL; 1010 1011 /* If realtime flag is set then must have realtime device */ 1012 if (fa->fsx_xflags & XFS_XFLAG_REALTIME) { 1013 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || 1014 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) 1015 return -EINVAL; 1016 } 1017 1018 /* 1019 * Can't modify an immutable/append-only file unless 1020 * we have appropriate permission. 1021 */ 1022 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) || 1023 (fa->fsx_xflags & (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && 1024 !capable(CAP_LINUX_IMMUTABLE)) 1025 return -EPERM; 1026 1027 xfs_set_diflags(ip, fa->fsx_xflags); 1028 xfs_diflags_to_linux(ip); 1029 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); 1030 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 1031 XFS_STATS_INC(xs_ig_attrchg); 1032 return 0; 1033} 1034 1035/* 1036 * Set up the transaction structure for the setattr operation, checking that we 1037 * have permission to do so. On success, return a clean transaction and the 1038 * inode locked exclusively ready for further operation specific checks. On 1039 * failure, return an error without modifying or locking the inode. 1040 */ 1041static struct xfs_trans * 1042xfs_ioctl_setattr_get_trans( 1043 struct xfs_inode *ip) 1044{ 1045 struct xfs_mount *mp = ip->i_mount; 1046 struct xfs_trans *tp; 1047 int error; 1048 1049 if (mp->m_flags & XFS_MOUNT_RDONLY) 1050 return ERR_PTR(-EROFS); 1051 if (XFS_FORCED_SHUTDOWN(mp)) 1052 return ERR_PTR(-EIO); 1053 1054 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); 1055 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); 1056 if (error) 1057 goto out_cancel; 1058 1059 xfs_ilock(ip, XFS_ILOCK_EXCL); 1060 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 1061 1062 /* 1063 * CAP_FOWNER overrides the following restrictions: 1064 * 1065 * The user ID of the calling process must be equal to the file owner 1066 * ID, except in cases where the CAP_FSETID capability is applicable. 1067 */ 1068 if (!inode_owner_or_capable(VFS_I(ip))) { 1069 error = -EPERM; 1070 goto out_cancel; 1071 } 1072 1073 if (mp->m_flags & XFS_MOUNT_WSYNC) 1074 xfs_trans_set_sync(tp); 1075 1076 return tp; 1077 1078out_cancel: 1079 xfs_trans_cancel(tp, 0); 1080 return ERR_PTR(error); 1081} 1082 1083/* 1084 * extent size hint validation is somewhat cumbersome. Rules are: 1085 * 1086 * 1. extent size hint is only valid for directories and regular files 1087 * 2. XFS_XFLAG_EXTSIZE is only valid for regular files 1088 * 3. XFS_XFLAG_EXTSZINHERIT is only valid for directories. 1089 * 4. can only be changed on regular files if no extents are allocated 1090 * 5. can be changed on directories at any time 1091 * 6. extsize hint of 0 turns off hints, clears inode flags. 1092 * 7. Extent size must be a multiple of the appropriate block size. 1093 * 8. for non-realtime files, the extent size hint must be limited 1094 * to half the AG size to avoid alignment extending the extent beyond the 1095 * limits of the AG. 1096 */ 1097static int 1098xfs_ioctl_setattr_check_extsize( 1099 struct xfs_inode *ip, 1100 struct fsxattr *fa) 1101{ 1102 struct xfs_mount *mp = ip->i_mount; 1103 1104 if ((fa->fsx_xflags & XFS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode)) 1105 return -EINVAL; 1106 1107 if ((fa->fsx_xflags & XFS_XFLAG_EXTSZINHERIT) && 1108 !S_ISDIR(ip->i_d.di_mode)) 1109 return -EINVAL; 1110 1111 if (S_ISREG(ip->i_d.di_mode) && ip->i_d.di_nextents && 1112 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) 1113 return -EINVAL; 1114 1115 if (fa->fsx_extsize != 0) { 1116 xfs_extlen_t size; 1117 xfs_fsblock_t extsize_fsb; 1118 1119 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); 1120 if (extsize_fsb > MAXEXTLEN) 1121 return -EINVAL; 1122 1123 if (XFS_IS_REALTIME_INODE(ip) || 1124 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) { 1125 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; 1126 } else { 1127 size = mp->m_sb.sb_blocksize; 1128 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) 1129 return -EINVAL; 1130 } 1131 1132 if (fa->fsx_extsize % size) 1133 return -EINVAL; 1134 } else 1135 fa->fsx_xflags &= ~(XFS_XFLAG_EXTSIZE | XFS_XFLAG_EXTSZINHERIT); 1136 1137 return 0; 1138} 1139 1140static int 1141xfs_ioctl_setattr_check_projid( 1142 struct xfs_inode *ip, 1143 struct fsxattr *fa) 1144{ 1145 /* Disallow 32bit project ids if projid32bit feature is not enabled. */ 1146 if (fa->fsx_projid > (__uint16_t)-1 && 1147 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) 1148 return -EINVAL; 1149 1150 /* 1151 * Project Quota ID state is only allowed to change from within the init 1152 * namespace. Enforce that restriction only if we are trying to change 1153 * the quota ID state. Everything else is allowed in user namespaces. 1154 */ 1155 if (current_user_ns() == &init_user_ns) 1156 return 0; 1157 1158 if (xfs_get_projid(ip) != fa->fsx_projid) 1159 return -EINVAL; 1160 if ((fa->fsx_xflags & XFS_XFLAG_PROJINHERIT) != 1161 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)) 1162 return -EINVAL; 1163 1164 return 0; 1165} 1166 1167STATIC int 1168xfs_ioctl_setattr( 1169 xfs_inode_t *ip, 1170 struct fsxattr *fa) 1171{ 1172 struct xfs_mount *mp = ip->i_mount; 1173 struct xfs_trans *tp; 1174 struct xfs_dquot *udqp = NULL; 1175 struct xfs_dquot *pdqp = NULL; 1176 struct xfs_dquot *olddquot = NULL; 1177 int code; 1178 1179 trace_xfs_ioctl_setattr(ip); 1180 1181 code = xfs_ioctl_setattr_check_projid(ip, fa); 1182 if (code) 1183 return code; 1184 1185 /* 1186 * If disk quotas is on, we make sure that the dquots do exist on disk, 1187 * before we start any other transactions. Trying to do this later 1188 * is messy. We don't care to take a readlock to look at the ids 1189 * in inode here, because we can't hold it across the trans_reserve. 1190 * If the IDs do change before we take the ilock, we're covered 1191 * because the i_*dquot fields will get updated anyway. 1192 */ 1193 if (XFS_IS_QUOTA_ON(mp)) { 1194 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, 1195 ip->i_d.di_gid, fa->fsx_projid, 1196 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); 1197 if (code) 1198 return code; 1199 } 1200 1201 tp = xfs_ioctl_setattr_get_trans(ip); 1202 if (IS_ERR(tp)) { 1203 code = PTR_ERR(tp); 1204 goto error_free_dquots; 1205 } 1206 1207 1208 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && 1209 xfs_get_projid(ip) != fa->fsx_projid) { 1210 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, 1211 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); 1212 if (code) /* out of quota */ 1213 goto error_trans_cancel; 1214 } 1215 1216 code = xfs_ioctl_setattr_check_extsize(ip, fa); 1217 if (code) 1218 goto error_trans_cancel; 1219 1220 code = xfs_ioctl_setattr_xflags(tp, ip, fa); 1221 if (code) 1222 goto error_trans_cancel; 1223 1224 /* 1225 * Change file ownership. Must be the owner or privileged. CAP_FSETID 1226 * overrides the following restrictions: 1227 * 1228 * The set-user-ID and set-group-ID bits of a file will be cleared upon 1229 * successful return from chown() 1230 */ 1231 1232 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && 1233 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) 1234 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); 1235 1236 /* Change the ownerships and register project quota modifications */ 1237 if (xfs_get_projid(ip) != fa->fsx_projid) { 1238 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { 1239 olddquot = xfs_qm_vop_chown(tp, ip, 1240 &ip->i_pdquot, pdqp); 1241 } 1242 ASSERT(ip->i_d.di_version > 1); 1243 xfs_set_projid(ip, fa->fsx_projid); 1244 } 1245 1246 /* 1247 * Only set the extent size hint if we've already determined that the 1248 * extent size hint should be set on the inode. If no extent size flags 1249 * are set on the inode then unconditionally clear the extent size hint. 1250 */ 1251 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) 1252 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; 1253 else 1254 ip->i_d.di_extsize = 0; 1255 1256 code = xfs_trans_commit(tp, 0); 1257 1258 /* 1259 * Release any dquot(s) the inode had kept before chown. 1260 */ 1261 xfs_qm_dqrele(olddquot); 1262 xfs_qm_dqrele(udqp); 1263 xfs_qm_dqrele(pdqp); 1264 1265 return code; 1266 1267error_trans_cancel: 1268 xfs_trans_cancel(tp, 0); 1269error_free_dquots: 1270 xfs_qm_dqrele(udqp); 1271 xfs_qm_dqrele(pdqp); 1272 return code; 1273} 1274 1275STATIC int 1276xfs_ioc_fssetxattr( 1277 xfs_inode_t *ip, 1278 struct file *filp, 1279 void __user *arg) 1280{ 1281 struct fsxattr fa; 1282 int error; 1283 1284 if (copy_from_user(&fa, arg, sizeof(fa))) 1285 return -EFAULT; 1286 1287 error = mnt_want_write_file(filp); 1288 if (error) 1289 return error; 1290 error = xfs_ioctl_setattr(ip, &fa); 1291 mnt_drop_write_file(filp); 1292 return error; 1293} 1294 1295STATIC int 1296xfs_ioc_getxflags( 1297 xfs_inode_t *ip, 1298 void __user *arg) 1299{ 1300 unsigned int flags; 1301 1302 flags = xfs_di2lxflags(ip->i_d.di_flags); 1303 if (copy_to_user(arg, &flags, sizeof(flags))) 1304 return -EFAULT; 1305 return 0; 1306} 1307 1308STATIC int 1309xfs_ioc_setxflags( 1310 struct xfs_inode *ip, 1311 struct file *filp, 1312 void __user *arg) 1313{ 1314 struct xfs_trans *tp; 1315 struct fsxattr fa; 1316 unsigned int flags; 1317 int error; 1318 1319 if (copy_from_user(&flags, arg, sizeof(flags))) 1320 return -EFAULT; 1321 1322 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ 1323 FS_NOATIME_FL | FS_NODUMP_FL | \ 1324 FS_SYNC_FL)) 1325 return -EOPNOTSUPP; 1326 1327 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); 1328 1329 error = mnt_want_write_file(filp); 1330 if (error) 1331 return error; 1332 1333 tp = xfs_ioctl_setattr_get_trans(ip); 1334 if (IS_ERR(tp)) { 1335 error = PTR_ERR(tp); 1336 goto out_drop_write; 1337 } 1338 1339 error = xfs_ioctl_setattr_xflags(tp, ip, &fa); 1340 if (error) { 1341 xfs_trans_cancel(tp, 0); 1342 goto out_drop_write; 1343 } 1344 1345 error = xfs_trans_commit(tp, 0); 1346out_drop_write: 1347 mnt_drop_write_file(filp); 1348 return error; 1349} 1350 1351STATIC int 1352xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) 1353{ 1354 struct getbmap __user *base = (struct getbmap __user *)*ap; 1355 1356 /* copy only getbmap portion (not getbmapx) */ 1357 if (copy_to_user(base, bmv, sizeof(struct getbmap))) 1358 return -EFAULT; 1359 1360 *ap += sizeof(struct getbmap); 1361 return 0; 1362} 1363 1364STATIC int 1365xfs_ioc_getbmap( 1366 struct xfs_inode *ip, 1367 int ioflags, 1368 unsigned int cmd, 1369 void __user *arg) 1370{ 1371 struct getbmapx bmx; 1372 int error; 1373 1374 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) 1375 return -EFAULT; 1376 1377 if (bmx.bmv_count < 2) 1378 return -EINVAL; 1379 1380 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); 1381 if (ioflags & XFS_IO_INVIS) 1382 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; 1383 1384 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, 1385 (__force struct getbmap *)arg+1); 1386 if (error) 1387 return error; 1388 1389 /* copy back header - only size of getbmap */ 1390 if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) 1391 return -EFAULT; 1392 return 0; 1393} 1394 1395STATIC int 1396xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) 1397{ 1398 struct getbmapx __user *base = (struct getbmapx __user *)*ap; 1399 1400 if (copy_to_user(base, bmv, sizeof(struct getbmapx))) 1401 return -EFAULT; 1402 1403 *ap += sizeof(struct getbmapx); 1404 return 0; 1405} 1406 1407STATIC int 1408xfs_ioc_getbmapx( 1409 struct xfs_inode *ip, 1410 void __user *arg) 1411{ 1412 struct getbmapx bmx; 1413 int error; 1414 1415 if (copy_from_user(&bmx, arg, sizeof(bmx))) 1416 return -EFAULT; 1417 1418 if (bmx.bmv_count < 2) 1419 return -EINVAL; 1420 1421 if (bmx.bmv_iflags & (~BMV_IF_VALID)) 1422 return -EINVAL; 1423 1424 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, 1425 (__force struct getbmapx *)arg+1); 1426 if (error) 1427 return error; 1428 1429 /* copy back header */ 1430 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) 1431 return -EFAULT; 1432 1433 return 0; 1434} 1435 1436int 1437xfs_ioc_swapext( 1438 xfs_swapext_t *sxp) 1439{ 1440 xfs_inode_t *ip, *tip; 1441 struct fd f, tmp; 1442 int error = 0; 1443 1444 /* Pull information for the target fd */ 1445 f = fdget((int)sxp->sx_fdtarget); 1446 if (!f.file) { 1447 error = -EINVAL; 1448 goto out; 1449 } 1450 1451 if (!(f.file->f_mode & FMODE_WRITE) || 1452 !(f.file->f_mode & FMODE_READ) || 1453 (f.file->f_flags & O_APPEND)) { 1454 error = -EBADF; 1455 goto out_put_file; 1456 } 1457 1458 tmp = fdget((int)sxp->sx_fdtmp); 1459 if (!tmp.file) { 1460 error = -EINVAL; 1461 goto out_put_file; 1462 } 1463 1464 if (!(tmp.file->f_mode & FMODE_WRITE) || 1465 !(tmp.file->f_mode & FMODE_READ) || 1466 (tmp.file->f_flags & O_APPEND)) { 1467 error = -EBADF; 1468 goto out_put_tmp_file; 1469 } 1470 1471 if (IS_SWAPFILE(file_inode(f.file)) || 1472 IS_SWAPFILE(file_inode(tmp.file))) { 1473 error = -EINVAL; 1474 goto out_put_tmp_file; 1475 } 1476 1477 ip = XFS_I(file_inode(f.file)); 1478 tip = XFS_I(file_inode(tmp.file)); 1479 1480 if (ip->i_mount != tip->i_mount) { 1481 error = -EINVAL; 1482 goto out_put_tmp_file; 1483 } 1484 1485 if (ip->i_ino == tip->i_ino) { 1486 error = -EINVAL; 1487 goto out_put_tmp_file; 1488 } 1489 1490 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { 1491 error = -EIO; 1492 goto out_put_tmp_file; 1493 } 1494 1495 error = xfs_swap_extents(ip, tip, sxp); 1496 1497 out_put_tmp_file: 1498 fdput(tmp); 1499 out_put_file: 1500 fdput(f); 1501 out: 1502 return error; 1503} 1504 1505/* 1506 * Note: some of the ioctl's return positive numbers as a 1507 * byte count indicating success, such as readlink_by_handle. 1508 * So we don't "sign flip" like most other routines. This means 1509 * true errors need to be returned as a negative value. 1510 */ 1511long 1512xfs_file_ioctl( 1513 struct file *filp, 1514 unsigned int cmd, 1515 unsigned long p) 1516{ 1517 struct inode *inode = file_inode(filp); 1518 struct xfs_inode *ip = XFS_I(inode); 1519 struct xfs_mount *mp = ip->i_mount; 1520 void __user *arg = (void __user *)p; 1521 int ioflags = 0; 1522 int error; 1523 1524 if (filp->f_mode & FMODE_NOCMTIME) 1525 ioflags |= XFS_IO_INVIS; 1526 1527 trace_xfs_file_ioctl(ip); 1528 1529 switch (cmd) { 1530 case FITRIM: 1531 return xfs_ioc_trim(mp, arg); 1532 case XFS_IOC_ALLOCSP: 1533 case XFS_IOC_FREESP: 1534 case XFS_IOC_RESVSP: 1535 case XFS_IOC_UNRESVSP: 1536 case XFS_IOC_ALLOCSP64: 1537 case XFS_IOC_FREESP64: 1538 case XFS_IOC_RESVSP64: 1539 case XFS_IOC_UNRESVSP64: 1540 case XFS_IOC_ZERO_RANGE: { 1541 xfs_flock64_t bf; 1542 1543 if (copy_from_user(&bf, arg, sizeof(bf))) 1544 return -EFAULT; 1545 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf); 1546 } 1547 case XFS_IOC_DIOINFO: { 1548 struct dioattr da; 1549 xfs_buftarg_t *target = 1550 XFS_IS_REALTIME_INODE(ip) ? 1551 mp->m_rtdev_targp : mp->m_ddev_targp; 1552 1553 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; 1554 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); 1555 1556 if (copy_to_user(arg, &da, sizeof(da))) 1557 return -EFAULT; 1558 return 0; 1559 } 1560 1561 case XFS_IOC_FSBULKSTAT_SINGLE: 1562 case XFS_IOC_FSBULKSTAT: 1563 case XFS_IOC_FSINUMBERS: 1564 return xfs_ioc_bulkstat(mp, cmd, arg); 1565 1566 case XFS_IOC_FSGEOMETRY_V1: 1567 return xfs_ioc_fsgeometry_v1(mp, arg); 1568 1569 case XFS_IOC_FSGEOMETRY: 1570 return xfs_ioc_fsgeometry(mp, arg); 1571 1572 case XFS_IOC_GETVERSION: 1573 return put_user(inode->i_generation, (int __user *)arg); 1574 1575 case XFS_IOC_FSGETXATTR: 1576 return xfs_ioc_fsgetxattr(ip, 0, arg); 1577 case XFS_IOC_FSGETXATTRA: 1578 return xfs_ioc_fsgetxattr(ip, 1, arg); 1579 case XFS_IOC_FSSETXATTR: 1580 return xfs_ioc_fssetxattr(ip, filp, arg); 1581 case XFS_IOC_GETXFLAGS: 1582 return xfs_ioc_getxflags(ip, arg); 1583 case XFS_IOC_SETXFLAGS: 1584 return xfs_ioc_setxflags(ip, filp, arg); 1585 1586 case XFS_IOC_FSSETDM: { 1587 struct fsdmidata dmi; 1588 1589 if (copy_from_user(&dmi, arg, sizeof(dmi))) 1590 return -EFAULT; 1591 1592 error = mnt_want_write_file(filp); 1593 if (error) 1594 return error; 1595 1596 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, 1597 dmi.fsd_dmstate); 1598 mnt_drop_write_file(filp); 1599 return error; 1600 } 1601 1602 case XFS_IOC_GETBMAP: 1603 case XFS_IOC_GETBMAPA: 1604 return xfs_ioc_getbmap(ip, ioflags, cmd, arg); 1605 1606 case XFS_IOC_GETBMAPX: 1607 return xfs_ioc_getbmapx(ip, arg); 1608 1609 case XFS_IOC_FD_TO_HANDLE: 1610 case XFS_IOC_PATH_TO_HANDLE: 1611 case XFS_IOC_PATH_TO_FSHANDLE: { 1612 xfs_fsop_handlereq_t hreq; 1613 1614 if (copy_from_user(&hreq, arg, sizeof(hreq))) 1615 return -EFAULT; 1616 return xfs_find_handle(cmd, &hreq); 1617 } 1618 case XFS_IOC_OPEN_BY_HANDLE: { 1619 xfs_fsop_handlereq_t hreq; 1620 1621 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1622 return -EFAULT; 1623 return xfs_open_by_handle(filp, &hreq); 1624 } 1625 case XFS_IOC_FSSETDM_BY_HANDLE: 1626 return xfs_fssetdm_by_handle(filp, arg); 1627 1628 case XFS_IOC_READLINK_BY_HANDLE: { 1629 xfs_fsop_handlereq_t hreq; 1630 1631 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) 1632 return -EFAULT; 1633 return xfs_readlink_by_handle(filp, &hreq); 1634 } 1635 case XFS_IOC_ATTRLIST_BY_HANDLE: 1636 return xfs_attrlist_by_handle(filp, arg); 1637 1638 case XFS_IOC_ATTRMULTI_BY_HANDLE: 1639 return xfs_attrmulti_by_handle(filp, arg); 1640 1641 case XFS_IOC_SWAPEXT: { 1642 struct xfs_swapext sxp; 1643 1644 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) 1645 return -EFAULT; 1646 error = mnt_want_write_file(filp); 1647 if (error) 1648 return error; 1649 error = xfs_ioc_swapext(&sxp); 1650 mnt_drop_write_file(filp); 1651 return error; 1652 } 1653 1654 case XFS_IOC_FSCOUNTS: { 1655 xfs_fsop_counts_t out; 1656 1657 error = xfs_fs_counts(mp, &out); 1658 if (error) 1659 return error; 1660 1661 if (copy_to_user(arg, &out, sizeof(out))) 1662 return -EFAULT; 1663 return 0; 1664 } 1665 1666 case XFS_IOC_SET_RESBLKS: { 1667 xfs_fsop_resblks_t inout; 1668 __uint64_t in; 1669 1670 if (!capable(CAP_SYS_ADMIN)) 1671 return -EPERM; 1672 1673 if (mp->m_flags & XFS_MOUNT_RDONLY) 1674 return -EROFS; 1675 1676 if (copy_from_user(&inout, arg, sizeof(inout))) 1677 return -EFAULT; 1678 1679 error = mnt_want_write_file(filp); 1680 if (error) 1681 return error; 1682 1683 /* input parameter is passed in resblks field of structure */ 1684 in = inout.resblks; 1685 error = xfs_reserve_blocks(mp, &in, &inout); 1686 mnt_drop_write_file(filp); 1687 if (error) 1688 return error; 1689 1690 if (copy_to_user(arg, &inout, sizeof(inout))) 1691 return -EFAULT; 1692 return 0; 1693 } 1694 1695 case XFS_IOC_GET_RESBLKS: { 1696 xfs_fsop_resblks_t out; 1697 1698 if (!capable(CAP_SYS_ADMIN)) 1699 return -EPERM; 1700 1701 error = xfs_reserve_blocks(mp, NULL, &out); 1702 if (error) 1703 return error; 1704 1705 if (copy_to_user(arg, &out, sizeof(out))) 1706 return -EFAULT; 1707 1708 return 0; 1709 } 1710 1711 case XFS_IOC_FSGROWFSDATA: { 1712 xfs_growfs_data_t in; 1713 1714 if (copy_from_user(&in, arg, sizeof(in))) 1715 return -EFAULT; 1716 1717 error = mnt_want_write_file(filp); 1718 if (error) 1719 return error; 1720 error = xfs_growfs_data(mp, &in); 1721 mnt_drop_write_file(filp); 1722 return error; 1723 } 1724 1725 case XFS_IOC_FSGROWFSLOG: { 1726 xfs_growfs_log_t in; 1727 1728 if (copy_from_user(&in, arg, sizeof(in))) 1729 return -EFAULT; 1730 1731 error = mnt_want_write_file(filp); 1732 if (error) 1733 return error; 1734 error = xfs_growfs_log(mp, &in); 1735 mnt_drop_write_file(filp); 1736 return error; 1737 } 1738 1739 case XFS_IOC_FSGROWFSRT: { 1740 xfs_growfs_rt_t in; 1741 1742 if (copy_from_user(&in, arg, sizeof(in))) 1743 return -EFAULT; 1744 1745 error = mnt_want_write_file(filp); 1746 if (error) 1747 return error; 1748 error = xfs_growfs_rt(mp, &in); 1749 mnt_drop_write_file(filp); 1750 return error; 1751 } 1752 1753 case XFS_IOC_GOINGDOWN: { 1754 __uint32_t in; 1755 1756 if (!capable(CAP_SYS_ADMIN)) 1757 return -EPERM; 1758 1759 if (get_user(in, (__uint32_t __user *)arg)) 1760 return -EFAULT; 1761 1762 return xfs_fs_goingdown(mp, in); 1763 } 1764 1765 case XFS_IOC_ERROR_INJECTION: { 1766 xfs_error_injection_t in; 1767 1768 if (!capable(CAP_SYS_ADMIN)) 1769 return -EPERM; 1770 1771 if (copy_from_user(&in, arg, sizeof(in))) 1772 return -EFAULT; 1773 1774 return xfs_errortag_add(in.errtag, mp); 1775 } 1776 1777 case XFS_IOC_ERROR_CLEARALL: 1778 if (!capable(CAP_SYS_ADMIN)) 1779 return -EPERM; 1780 1781 return xfs_errortag_clearall(mp, 1); 1782 1783 case XFS_IOC_FREE_EOFBLOCKS: { 1784 struct xfs_fs_eofblocks eofb; 1785 struct xfs_eofblocks keofb; 1786 1787 if (!capable(CAP_SYS_ADMIN)) 1788 return -EPERM; 1789 1790 if (mp->m_flags & XFS_MOUNT_RDONLY) 1791 return -EROFS; 1792 1793 if (copy_from_user(&eofb, arg, sizeof(eofb))) 1794 return -EFAULT; 1795 1796 error = xfs_fs_eofblocks_from_user(&eofb, &keofb); 1797 if (error) 1798 return error; 1799 1800 return xfs_icache_free_eofblocks(mp, &keofb); 1801 } 1802 1803 default: 1804 return -ENOTTY; 1805 } 1806} 1807