1 /*- 2 * modified for EXT2FS support in Lites 1.1 3 * 4 * Aug 1995, Godmar Back (gback@cs.utah.edu) 5 * University of Utah, Department of Computer Science 6 */ 7 /*- 8 * Copyright (c) 1982, 1986, 1989, 1993 9 * The Regents of the University of California. All rights reserved. 10 * (c) UNIX System Laboratories, Inc. 11 * All or some portions of this file are derived from material licensed 12 * to the University of California by American Telephone and Telegraph 13 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 14 * the permission of UNIX System Laboratories, Inc. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)ufs_vnops.c 8.7 (Berkeley) 2/3/94 41 * @(#)ufs_vnops.c 8.27 (Berkeley) 5/27/95 42 * $FreeBSD$ 43 */ 44 45 #include "opt_suiddir.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/fcntl.h> 51 #include <sys/stat.h> 52 #include <sys/bio.h> 53 #include <sys/buf.h> 54 #include <sys/endian.h> 55 #include <sys/priv.h> 56 #include <sys/mount.h> 57 #include <sys/unistd.h> 58 #include <sys/time.h> 59 #include <sys/vnode.h> 60 #include <sys/namei.h> 61 #include <sys/lockf.h> 62 #include <sys/event.h> 63 #include <sys/conf.h> 64 #include <sys/file.h> 65 66 #include <vm/vm.h> 67 #include <vm/vm_page.h> 68 #include <vm/vm_object.h> 69 #include <vm/vm_extern.h> 70 #include <vm/vnode_pager.h> 71 72 #include "opt_directio.h" 73 74 #include <ufs/ufs/dir.h> 75 76 #include <fs/ext2fs/fs.h> 77 #include <fs/ext2fs/inode.h> 78 #include <fs/ext2fs/ext2_extern.h> 79 #include <fs/ext2fs/ext2fs.h> 80 #include <fs/ext2fs/ext2_dinode.h> 81 #include <fs/ext2fs/ext2_dir.h> 82 #include <fs/ext2fs/ext2_mount.h> 83 84 static int ext2_makeinode(int mode, struct vnode *, struct vnode **, struct componentname *); 85 static void ext2_itimes_locked(struct vnode *); 86 87 static vop_access_t ext2_access; 88 static int ext2_chmod(struct vnode *, int, struct ucred *, struct thread *); 89 static int ext2_chown(struct vnode *, uid_t, gid_t, struct ucred *, 90 struct thread *); 91 static vop_close_t ext2_close; 92 static vop_create_t ext2_create; 93 static vop_fsync_t ext2_fsync; 94 static vop_getattr_t ext2_getattr; 95 static vop_link_t ext2_link; 96 static vop_mkdir_t ext2_mkdir; 97 static vop_mknod_t ext2_mknod; 98 static vop_open_t ext2_open; 99 static vop_pathconf_t ext2_pathconf; 100 static vop_print_t ext2_print; 101 static vop_read_t ext2_read; 102 static vop_readlink_t ext2_readlink; 103 static vop_remove_t ext2_remove; 104 static vop_rename_t ext2_rename; 105 static vop_rmdir_t ext2_rmdir; 106 static vop_setattr_t ext2_setattr; 107 static vop_strategy_t ext2_strategy; 108 static vop_symlink_t ext2_symlink; 109 static vop_write_t ext2_write; 110 static vop_vptofh_t ext2_vptofh; 111 static vop_close_t ext2fifo_close; 112 static vop_kqfilter_t ext2fifo_kqfilter; 113 114 /* Global vfs data structures for ext2. */ 115 struct vop_vector ext2_vnodeops = { 116 .vop_default = &default_vnodeops, 117 .vop_access = ext2_access, 118 .vop_bmap = ext2_bmap, 119 .vop_cachedlookup = ext2_lookup, 120 .vop_close = ext2_close, 121 .vop_create = ext2_create, 122 .vop_fsync = ext2_fsync, 123 .vop_getattr = ext2_getattr, 124 .vop_inactive = ext2_inactive, 125 .vop_link = ext2_link, 126 .vop_lookup = vfs_cache_lookup, 127 .vop_mkdir = ext2_mkdir, 128 .vop_mknod = ext2_mknod, 129 .vop_open = ext2_open, 130 .vop_pathconf = ext2_pathconf, 131 .vop_poll = vop_stdpoll, 132 .vop_print = ext2_print, 133 .vop_read = ext2_read, 134 .vop_readdir = ext2_readdir, 135 .vop_readlink = ext2_readlink, 136 .vop_reallocblks = ext2_reallocblks, 137 .vop_reclaim = ext2_reclaim, 138 .vop_remove = ext2_remove, 139 .vop_rename = ext2_rename, 140 .vop_rmdir = ext2_rmdir, 141 .vop_setattr = ext2_setattr, 142 .vop_strategy = ext2_strategy, 143 .vop_symlink = ext2_symlink, 144 .vop_write = ext2_write, 145 .vop_vptofh = ext2_vptofh, 146 }; 147 148 struct vop_vector ext2_fifoops = { 149 .vop_default = &fifo_specops, 150 .vop_access = ext2_access, 151 .vop_close = ext2fifo_close, 152 .vop_fsync = ext2_fsync, 153 .vop_getattr = ext2_getattr, 154 .vop_inactive = ext2_inactive, 155 .vop_kqfilter = ext2fifo_kqfilter, 156 .vop_print = ext2_print, 157 .vop_read = VOP_PANIC, 158 .vop_reclaim = ext2_reclaim, 159 .vop_setattr = ext2_setattr, 160 .vop_write = VOP_PANIC, 161 .vop_vptofh = ext2_vptofh, 162 }; 163 164 /* 165 * A virgin directory (no blushing please). 166 * Note that the type and namlen fields are reversed relative to ext2. 167 * Also, we don't use `struct odirtemplate', since it would just cause 168 * endianness problems. 169 */ 170 static struct dirtemplate mastertemplate = { 171 0, 12, 1, EXT2_FT_DIR, ".", 172 0, DIRBLKSIZ - 12, 2, EXT2_FT_DIR, ".." 173 }; 174 static struct dirtemplate omastertemplate = { 175 0, 12, 1, EXT2_FT_UNKNOWN, ".", 176 0, DIRBLKSIZ - 12, 2, EXT2_FT_UNKNOWN, ".." 177 }; 178 179 static void 180 ext2_itimes_locked(struct vnode *vp) 181 { 182 struct inode *ip; 183 struct timespec ts; 184 185 ASSERT_VI_LOCKED(vp, __func__); 186 187 ip = VTOI(vp); 188 if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0) 189 return; 190 if ((vp->v_type == VBLK || vp->v_type == VCHR)) 191 ip->i_flag |= IN_LAZYMOD; 192 else 193 ip->i_flag |= IN_MODIFIED; 194 if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 195 vfs_timestamp(&ts); 196 if (ip->i_flag & IN_ACCESS) { 197 ip->i_atime = ts.tv_sec; 198 ip->i_atimensec = ts.tv_nsec; 199 } 200 if (ip->i_flag & IN_UPDATE) { 201 ip->i_mtime = ts.tv_sec; 202 ip->i_mtimensec = ts.tv_nsec; 203 ip->i_modrev++; 204 } 205 if (ip->i_flag & IN_CHANGE) { 206 ip->i_ctime = ts.tv_sec; 207 ip->i_ctimensec = ts.tv_nsec; 208 } 209 } 210 ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); 211 } 212 213 void 214 ext2_itimes(struct vnode *vp) 215 { 216 217 VI_LOCK(vp); 218 ext2_itimes_locked(vp); 219 VI_UNLOCK(vp); 220 } 221 222 /* 223 * Create a regular file 224 */ 225 static int 226 ext2_create(ap) 227 struct vop_create_args /* { 228 struct vnode *a_dvp; 229 struct vnode **a_vpp; 230 struct componentname *a_cnp; 231 struct vattr *a_vap; 232 } */ *ap; 233 { 234 int error; 235 236 error = 237 ext2_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode), 238 ap->a_dvp, ap->a_vpp, ap->a_cnp); 239 if (error) 240 return (error); 241 return (0); 242 } 243 244 static int 245 ext2_open(ap) 246 struct vop_open_args /* { 247 struct vnode *a_vp; 248 int a_mode; 249 struct ucred *a_cred; 250 struct thread *a_td; 251 } */ *ap; 252 { 253 254 if (ap->a_vp->v_type == VBLK || ap->a_vp->v_type == VCHR) 255 return (EOPNOTSUPP); 256 257 /* 258 * Files marked append-only must be opened for appending. 259 */ 260 if ((VTOI(ap->a_vp)->i_flags & APPEND) && 261 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 262 return (EPERM); 263 264 vnode_create_vobject(ap->a_vp, VTOI(ap->a_vp)->i_size, ap->a_td); 265 266 return (0); 267 } 268 269 /* 270 * Close called. 271 * 272 * Update the times on the inode. 273 */ 274 static int 275 ext2_close(ap) 276 struct vop_close_args /* { 277 struct vnode *a_vp; 278 int a_fflag; 279 struct ucred *a_cred; 280 struct thread *a_td; 281 } */ *ap; 282 { 283 struct vnode *vp = ap->a_vp; 284 285 VI_LOCK(vp); 286 if (vp->v_usecount > 1) 287 ext2_itimes_locked(vp); 288 VI_UNLOCK(vp); 289 return (0); 290 } 291 292 static int 293 ext2_access(ap) 294 struct vop_access_args /* { 295 struct vnode *a_vp; 296 accmode_t a_accmode; 297 struct ucred *a_cred; 298 struct thread *a_td; 299 } */ *ap; 300 { 301 struct vnode *vp = ap->a_vp; 302 struct inode *ip = VTOI(vp); 303 accmode_t accmode = ap->a_accmode; 304 int error; 305 306 if (vp->v_type == VBLK || vp->v_type == VCHR) 307 return (EOPNOTSUPP); 308 309 /* 310 * Disallow write attempts on read-only file systems; 311 * unless the file is a socket, fifo, or a block or 312 * character device resident on the file system. 313 */ 314 if (accmode & VWRITE) { 315 switch (vp->v_type) { 316 case VDIR: 317 case VLNK: 318 case VREG: 319 if (vp->v_mount->mnt_flag & MNT_RDONLY) 320 return (EROFS); 321 break; 322 default: 323 break; 324 } 325 } 326 327 /* If immutable bit set, nobody gets to write it. */ 328 if ((accmode & VWRITE) && (ip->i_flags & (SF_IMMUTABLE | SF_SNAPSHOT))) 329 return (EPERM); 330 331 error = vaccess(vp->v_type, ip->i_mode, ip->i_uid, ip->i_gid, 332 ap->a_accmode, ap->a_cred, NULL); 333 return (error); 334 } 335 336 static int 337 ext2_getattr(ap) 338 struct vop_getattr_args /* { 339 struct vnode *a_vp; 340 struct vattr *a_vap; 341 struct ucred *a_cred; 342 } */ *ap; 343 { 344 struct vnode *vp = ap->a_vp; 345 struct inode *ip = VTOI(vp); 346 struct vattr *vap = ap->a_vap; 347 348 ext2_itimes(vp); 349 /* 350 * Copy from inode table 351 */ 352 vap->va_fsid = dev2udev(ip->i_devvp->v_rdev); 353 vap->va_fileid = ip->i_number; 354 vap->va_mode = ip->i_mode & ~IFMT; 355 vap->va_nlink = ip->i_nlink; 356 vap->va_uid = ip->i_uid; 357 vap->va_gid = ip->i_gid; 358 vap->va_rdev = ip->i_rdev; 359 vap->va_size = ip->i_size; 360 vap->va_atime.tv_sec = ip->i_atime; 361 vap->va_atime.tv_nsec = E2DI_HAS_XTIME(ip) ? ip->i_atimensec : 0; 362 vap->va_mtime.tv_sec = ip->i_mtime; 363 vap->va_mtime.tv_nsec = E2DI_HAS_XTIME(ip) ? ip->i_mtimensec : 0; 364 vap->va_ctime.tv_sec = ip->i_ctime; 365 vap->va_ctime.tv_nsec = E2DI_HAS_XTIME(ip) ? ip->i_ctimensec : 0; 366 if E2DI_HAS_XTIME(ip) { 367 vap->va_birthtime.tv_sec = ip->i_birthtime; 368 vap->va_birthtime.tv_nsec = ip->i_birthnsec; 369 } 370 vap->va_flags = ip->i_flags; 371 vap->va_gen = ip->i_gen; 372 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; 373 vap->va_bytes = dbtob((u_quad_t)ip->i_blocks); 374 vap->va_type = IFTOVT(ip->i_mode); 375 vap->va_filerev = ip->i_modrev; 376 return (0); 377 } 378 379 /* 380 * Set attribute vnode op. called from several syscalls 381 */ 382 static int 383 ext2_setattr(ap) 384 struct vop_setattr_args /* { 385 struct vnode *a_vp; 386 struct vattr *a_vap; 387 struct ucred *a_cred; 388 } */ *ap; 389 { 390 struct vattr *vap = ap->a_vap; 391 struct vnode *vp = ap->a_vp; 392 struct inode *ip = VTOI(vp); 393 struct ucred *cred = ap->a_cred; 394 struct thread *td = curthread; 395 int error; 396 397 /* 398 * Check for unsettable attributes. 399 */ 400 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 401 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 402 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 403 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 404 return (EINVAL); 405 } 406 if (vap->va_flags != VNOVAL) { 407 /* Disallow flags not supported by ext2fs. */ 408 if(vap->va_flags & ~(SF_APPEND | SF_IMMUTABLE | UF_NODUMP)) 409 return (EOPNOTSUPP); 410 411 if (vp->v_mount->mnt_flag & MNT_RDONLY) 412 return (EROFS); 413 /* 414 * Callers may only modify the file flags on objects they 415 * have VADMIN rights for. 416 */ 417 if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) 418 return (error); 419 /* 420 * Unprivileged processes and privileged processes in 421 * jail() are not permitted to unset system flags, or 422 * modify flags if any system flags are set. 423 * Privileged non-jail processes may not modify system flags 424 * if securelevel > 0 and any existing system flags are set. 425 */ 426 if (!priv_check_cred(cred, PRIV_VFS_SYSFLAGS, 0)) { 427 if (ip->i_flags & (SF_IMMUTABLE | SF_APPEND)) { 428 error = securelevel_gt(cred, 0); 429 if (error) 430 return (error); 431 } 432 } else { 433 if (ip->i_flags & (SF_IMMUTABLE | SF_APPEND) || 434 ((vap->va_flags ^ ip->i_flags) & SF_SETTABLE)) 435 return (EPERM); 436 } 437 ip->i_flags = vap->va_flags; 438 ip->i_flag |= IN_CHANGE; 439 if (ip->i_flags & (IMMUTABLE | APPEND)) 440 return (0); 441 } 442 if (ip->i_flags & (IMMUTABLE | APPEND)) 443 return (EPERM); 444 /* 445 * Go through the fields and update iff not VNOVAL. 446 */ 447 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 448 if (vp->v_mount->mnt_flag & MNT_RDONLY) 449 return (EROFS); 450 if ((error = ext2_chown(vp, vap->va_uid, vap->va_gid, cred, 451 td)) != 0) 452 return (error); 453 } 454 if (vap->va_size != VNOVAL) { 455 /* 456 * Disallow write attempts on read-only file systems; 457 * unless the file is a socket, fifo, or a block or 458 * character device resident on the file system. 459 */ 460 switch (vp->v_type) { 461 case VDIR: 462 return (EISDIR); 463 case VLNK: 464 case VREG: 465 if (vp->v_mount->mnt_flag & MNT_RDONLY) 466 return (EROFS); 467 break; 468 default: 469 break; 470 } 471 if ((error = ext2_truncate(vp, vap->va_size, 0, cred, td)) != 0) 472 return (error); 473 } 474 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 475 if (vp->v_mount->mnt_flag & MNT_RDONLY) 476 return (EROFS); 477 /* 478 * From utimes(2): 479 * If times is NULL, ... The caller must be the owner of 480 * the file, have permission to write the file, or be the 481 * super-user. 482 * If times is non-NULL, ... The caller must be the owner of 483 * the file or be the super-user. 484 */ 485 if ((error = VOP_ACCESS(vp, VADMIN, cred, td)) && 486 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 487 (error = VOP_ACCESS(vp, VWRITE, cred, td)))) 488 return (error); 489 if (vap->va_atime.tv_sec != VNOVAL) 490 ip->i_flag |= IN_ACCESS; 491 if (vap->va_mtime.tv_sec != VNOVAL) 492 ip->i_flag |= IN_CHANGE | IN_UPDATE; 493 ext2_itimes(vp); 494 if (vap->va_atime.tv_sec != VNOVAL) { 495 ip->i_atime = vap->va_atime.tv_sec; 496 ip->i_atimensec = vap->va_atime.tv_nsec; 497 } 498 if (vap->va_mtime.tv_sec != VNOVAL) { 499 ip->i_mtime = vap->va_mtime.tv_sec; 500 ip->i_mtimensec = vap->va_mtime.tv_nsec; 501 } 502 ip->i_birthtime = vap->va_birthtime.tv_sec; 503 ip->i_birthnsec = vap->va_birthtime.tv_nsec; 504 error = ext2_update(vp, 0); 505 if (error) 506 return (error); 507 } 508 error = 0; 509 if (vap->va_mode != (mode_t)VNOVAL) { 510 if (vp->v_mount->mnt_flag & MNT_RDONLY) 511 return (EROFS); 512 error = ext2_chmod(vp, (int)vap->va_mode, cred, td); 513 } 514 return (error); 515 } 516 517 /* 518 * Change the mode on a file. 519 * Inode must be locked before calling. 520 */ 521 static int 522 ext2_chmod(vp, mode, cred, td) 523 struct vnode *vp; 524 int mode; 525 struct ucred *cred; 526 struct thread *td; 527 { 528 struct inode *ip = VTOI(vp); 529 int error; 530 531 /* 532 * To modify the permissions on a file, must possess VADMIN 533 * for that file. 534 */ 535 if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) 536 return (error); 537 /* 538 * Privileged processes may set the sticky bit on non-directories, 539 * as well as set the setgid bit on a file with a group that the 540 * process is not a member of. 541 */ 542 if (vp->v_type != VDIR && (mode & S_ISTXT)) { 543 error = priv_check_cred(cred, PRIV_VFS_STICKYFILE, 0); 544 if (error) 545 return (EFTYPE); 546 } 547 if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) { 548 error = priv_check_cred(cred, PRIV_VFS_SETGID, 0); 549 if (error) 550 return (error); 551 } 552 ip->i_mode &= ~ALLPERMS; 553 ip->i_mode |= (mode & ALLPERMS); 554 ip->i_flag |= IN_CHANGE; 555 return (0); 556 } 557 558 /* 559 * Perform chown operation on inode ip; 560 * inode must be locked prior to call. 561 */ 562 static int 563 ext2_chown(vp, uid, gid, cred, td) 564 struct vnode *vp; 565 uid_t uid; 566 gid_t gid; 567 struct ucred *cred; 568 struct thread *td; 569 { 570 struct inode *ip = VTOI(vp); 571 uid_t ouid; 572 gid_t ogid; 573 int error = 0; 574 575 if (uid == (uid_t)VNOVAL) 576 uid = ip->i_uid; 577 if (gid == (gid_t)VNOVAL) 578 gid = ip->i_gid; 579 /* 580 * To modify the ownership of a file, must possess VADMIN 581 * for that file. 582 */ 583 if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) 584 return (error); 585 /* 586 * To change the owner of a file, or change the group of a file 587 * to a group of which we are not a member, the caller must 588 * have privilege. 589 */ 590 if (uid != ip->i_uid || (gid != ip->i_gid && 591 !groupmember(gid, cred))) { 592 error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0); 593 if (error) 594 return (error); 595 } 596 ogid = ip->i_gid; 597 ouid = ip->i_uid; 598 ip->i_gid = gid; 599 ip->i_uid = uid; 600 ip->i_flag |= IN_CHANGE; 601 if ((ip->i_mode & (ISUID | ISGID)) && (ouid != uid || ogid != gid)) { 602 if (priv_check_cred(cred, PRIV_VFS_RETAINSUGID, 0) != 0) 603 ip->i_mode &= ~(ISUID | ISGID); 604 } 605 return (0); 606 } 607 608 /* 609 * Synch an open file. 610 */ 611 /* ARGSUSED */ 612 static int 613 ext2_fsync(ap) 614 struct vop_fsync_args /* { 615 struct vnode *a_vp; 616 struct ucred *a_cred; 617 int a_waitfor; 618 struct thread *a_td; 619 } */ *ap; 620 { 621 /* 622 * Flush all dirty buffers associated with a vnode. 623 */ 624 625 vop_stdfsync(ap); 626 627 return (ext2_update(ap->a_vp, ap->a_waitfor == MNT_WAIT)); 628 } 629 630 /* 631 * Mknod vnode call 632 */ 633 /* ARGSUSED */ 634 static int 635 ext2_mknod(ap) 636 struct vop_mknod_args /* { 637 struct vnode *a_dvp; 638 struct vnode **a_vpp; 639 struct componentname *a_cnp; 640 struct vattr *a_vap; 641 } */ *ap; 642 { 643 struct vattr *vap = ap->a_vap; 644 struct vnode **vpp = ap->a_vpp; 645 struct inode *ip; 646 ino_t ino; 647 int error; 648 649 error = ext2_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), 650 ap->a_dvp, vpp, ap->a_cnp); 651 if (error) 652 return (error); 653 ip = VTOI(*vpp); 654 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 655 if (vap->va_rdev != VNOVAL) { 656 /* 657 * Want to be able to use this to make badblock 658 * inodes, so don't truncate the dev number. 659 */ 660 ip->i_rdev = vap->va_rdev; 661 } 662 /* 663 * Remove inode, then reload it through VFS_VGET so it is 664 * checked to see if it is an alias of an existing entry in 665 * the inode cache. XXX I don't believe this is necessary now. 666 */ 667 (*vpp)->v_type = VNON; 668 ino = ip->i_number; /* Save this before vgone() invalidates ip. */ 669 vgone(*vpp); 670 vput(*vpp); 671 error = VFS_VGET(ap->a_dvp->v_mount, ino, LK_EXCLUSIVE, vpp); 672 if (error) { 673 *vpp = NULL; 674 return (error); 675 } 676 return (0); 677 } 678 679 static int 680 ext2_remove(ap) 681 struct vop_remove_args /* { 682 struct vnode *a_dvp; 683 struct vnode *a_vp; 684 struct componentname *a_cnp; 685 } */ *ap; 686 { 687 struct inode *ip; 688 struct vnode *vp = ap->a_vp; 689 struct vnode *dvp = ap->a_dvp; 690 int error; 691 692 ip = VTOI(vp); 693 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 694 (VTOI(dvp)->i_flags & APPEND)) { 695 error = EPERM; 696 goto out; 697 } 698 error = ext2_dirremove(dvp, ap->a_cnp); 699 if (error == 0) { 700 ip->i_nlink--; 701 ip->i_flag |= IN_CHANGE; 702 } 703 out: 704 return (error); 705 } 706 707 /* 708 * link vnode call 709 */ 710 static int 711 ext2_link(ap) 712 struct vop_link_args /* { 713 struct vnode *a_tdvp; 714 struct vnode *a_vp; 715 struct componentname *a_cnp; 716 } */ *ap; 717 { 718 struct vnode *vp = ap->a_vp; 719 struct vnode *tdvp = ap->a_tdvp; 720 struct componentname *cnp = ap->a_cnp; 721 struct inode *ip; 722 int error; 723 724 #ifdef DIAGNOSTIC 725 if ((cnp->cn_flags & HASBUF) == 0) 726 panic("ext2_link: no name"); 727 #endif 728 if (tdvp->v_mount != vp->v_mount) { 729 error = EXDEV; 730 goto out; 731 } 732 ip = VTOI(vp); 733 if ((nlink_t)ip->i_nlink >= LINK_MAX) { 734 error = EMLINK; 735 goto out; 736 } 737 if (ip->i_flags & (IMMUTABLE | APPEND)) { 738 error = EPERM; 739 goto out; 740 } 741 ip->i_nlink++; 742 ip->i_flag |= IN_CHANGE; 743 error = ext2_update(vp, !DOINGASYNC(vp)); 744 if (!error) 745 error = ext2_direnter(ip, tdvp, cnp); 746 if (error) { 747 ip->i_nlink--; 748 ip->i_flag |= IN_CHANGE; 749 } 750 out: 751 return (error); 752 } 753 754 /* 755 * Rename system call. 756 * rename("foo", "bar"); 757 * is essentially 758 * unlink("bar"); 759 * link("foo", "bar"); 760 * unlink("foo"); 761 * but ``atomically''. Can't do full commit without saving state in the 762 * inode on disk which isn't feasible at this time. Best we can do is 763 * always guarantee the target exists. 764 * 765 * Basic algorithm is: 766 * 767 * 1) Bump link count on source while we're linking it to the 768 * target. This also ensure the inode won't be deleted out 769 * from underneath us while we work (it may be truncated by 770 * a concurrent `trunc' or `open' for creation). 771 * 2) Link source to destination. If destination already exists, 772 * delete it first. 773 * 3) Unlink source reference to inode if still around. If a 774 * directory was moved and the parent of the destination 775 * is different from the source, patch the ".." entry in the 776 * directory. 777 */ 778 static int 779 ext2_rename(ap) 780 struct vop_rename_args /* { 781 struct vnode *a_fdvp; 782 struct vnode *a_fvp; 783 struct componentname *a_fcnp; 784 struct vnode *a_tdvp; 785 struct vnode *a_tvp; 786 struct componentname *a_tcnp; 787 } */ *ap; 788 { 789 struct vnode *tvp = ap->a_tvp; 790 struct vnode *tdvp = ap->a_tdvp; 791 struct vnode *fvp = ap->a_fvp; 792 struct vnode *fdvp = ap->a_fdvp; 793 struct componentname *tcnp = ap->a_tcnp; 794 struct componentname *fcnp = ap->a_fcnp; 795 struct inode *ip, *xp, *dp; 796 struct dirtemplate dirbuf; 797 int doingdirectory = 0, oldparent = 0, newparent = 0; 798 int error = 0; 799 u_char namlen; 800 801 #ifdef DIAGNOSTIC 802 if ((tcnp->cn_flags & HASBUF) == 0 || 803 (fcnp->cn_flags & HASBUF) == 0) 804 panic("ext2_rename: no name"); 805 #endif 806 /* 807 * Check for cross-device rename. 808 */ 809 if ((fvp->v_mount != tdvp->v_mount) || 810 (tvp && (fvp->v_mount != tvp->v_mount))) { 811 error = EXDEV; 812 abortit: 813 if (tdvp == tvp) 814 vrele(tdvp); 815 else 816 vput(tdvp); 817 if (tvp) 818 vput(tvp); 819 vrele(fdvp); 820 vrele(fvp); 821 return (error); 822 } 823 824 if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || 825 (VTOI(tdvp)->i_flags & APPEND))) { 826 error = EPERM; 827 goto abortit; 828 } 829 830 /* 831 * Renaming a file to itself has no effect. The upper layers should 832 * not call us in that case. Temporarily just warn if they do. 833 */ 834 if (fvp == tvp) { 835 printf("ext2_rename: fvp == tvp (can't happen)\n"); 836 error = 0; 837 goto abortit; 838 } 839 840 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 841 goto abortit; 842 dp = VTOI(fdvp); 843 ip = VTOI(fvp); 844 if (ip->i_nlink >= LINK_MAX) { 845 VOP_UNLOCK(fvp, 0); 846 error = EMLINK; 847 goto abortit; 848 } 849 if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) 850 || (dp->i_flags & APPEND)) { 851 VOP_UNLOCK(fvp, 0); 852 error = EPERM; 853 goto abortit; 854 } 855 if ((ip->i_mode & IFMT) == IFDIR) { 856 /* 857 * Avoid ".", "..", and aliases of "." for obvious reasons. 858 */ 859 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 860 dp == ip || (fcnp->cn_flags | tcnp->cn_flags) & ISDOTDOT || 861 (ip->i_flag & IN_RENAME)) { 862 VOP_UNLOCK(fvp, 0); 863 error = EINVAL; 864 goto abortit; 865 } 866 ip->i_flag |= IN_RENAME; 867 oldparent = dp->i_number; 868 doingdirectory++; 869 } 870 vrele(fdvp); 871 872 /* 873 * When the target exists, both the directory 874 * and target vnodes are returned locked. 875 */ 876 dp = VTOI(tdvp); 877 xp = NULL; 878 if (tvp) 879 xp = VTOI(tvp); 880 881 /* 882 * 1) Bump link count while we're moving stuff 883 * around. If we crash somewhere before 884 * completing our work, the link count 885 * may be wrong, but correctable. 886 */ 887 ip->i_nlink++; 888 ip->i_flag |= IN_CHANGE; 889 if ((error = ext2_update(fvp, !DOINGASYNC(fvp))) != 0) { 890 VOP_UNLOCK(fvp, 0); 891 goto bad; 892 } 893 894 /* 895 * If ".." must be changed (ie the directory gets a new 896 * parent) then the source directory must not be in the 897 * directory hierarchy above the target, as this would 898 * orphan everything below the source directory. Also 899 * the user must have write permission in the source so 900 * as to be able to change "..". We must repeat the call 901 * to namei, as the parent directory is unlocked by the 902 * call to checkpath(). 903 */ 904 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread); 905 VOP_UNLOCK(fvp, 0); 906 if (oldparent != dp->i_number) 907 newparent = dp->i_number; 908 if (doingdirectory && newparent) { 909 if (error) /* write access check above */ 910 goto bad; 911 if (xp != NULL) 912 vput(tvp); 913 error = ext2_checkpath(ip, dp, tcnp->cn_cred); 914 if (error) 915 goto out; 916 VREF(tdvp); 917 error = relookup(tdvp, &tvp, tcnp); 918 if (error) 919 goto out; 920 vrele(tdvp); 921 dp = VTOI(tdvp); 922 xp = NULL; 923 if (tvp) 924 xp = VTOI(tvp); 925 } 926 /* 927 * 2) If target doesn't exist, link the target 928 * to the source and unlink the source. 929 * Otherwise, rewrite the target directory 930 * entry to reference the source inode and 931 * expunge the original entry's existence. 932 */ 933 if (xp == NULL) { 934 if (dp->i_devvp != ip->i_devvp) 935 panic("ext2_rename: EXDEV"); 936 /* 937 * Account for ".." in new directory. 938 * When source and destination have the same 939 * parent we don't fool with the link count. 940 */ 941 if (doingdirectory && newparent) { 942 if ((nlink_t)dp->i_nlink >= LINK_MAX) { 943 error = EMLINK; 944 goto bad; 945 } 946 dp->i_nlink++; 947 dp->i_flag |= IN_CHANGE; 948 error = ext2_update(tdvp, !DOINGASYNC(tdvp)); 949 if (error) 950 goto bad; 951 } 952 error = ext2_direnter(ip, tdvp, tcnp); 953 if (error) { 954 if (doingdirectory && newparent) { 955 dp->i_nlink--; 956 dp->i_flag |= IN_CHANGE; 957 (void)ext2_update(tdvp, 1); 958 } 959 goto bad; 960 } 961 vput(tdvp); 962 } else { 963 if (xp->i_devvp != dp->i_devvp || xp->i_devvp != ip->i_devvp) 964 panic("ext2_rename: EXDEV"); 965 /* 966 * Short circuit rename(foo, foo). 967 */ 968 if (xp->i_number == ip->i_number) 969 panic("ext2_rename: same file"); 970 /* 971 * If the parent directory is "sticky", then the user must 972 * own the parent directory, or the destination of the rename, 973 * otherwise the destination may not be changed (except by 974 * root). This implements append-only directories. 975 */ 976 if ((dp->i_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 && 977 tcnp->cn_cred->cr_uid != dp->i_uid && 978 xp->i_uid != tcnp->cn_cred->cr_uid) { 979 error = EPERM; 980 goto bad; 981 } 982 /* 983 * Target must be empty if a directory and have no links 984 * to it. Also, ensure source and target are compatible 985 * (both directories, or both not directories). 986 */ 987 if ((xp->i_mode&IFMT) == IFDIR) { 988 if (! ext2_dirempty(xp, dp->i_number, tcnp->cn_cred) || 989 xp->i_nlink > 2) { 990 error = ENOTEMPTY; 991 goto bad; 992 } 993 if (!doingdirectory) { 994 error = ENOTDIR; 995 goto bad; 996 } 997 cache_purge(tdvp); 998 } else if (doingdirectory) { 999 error = EISDIR; 1000 goto bad; 1001 } 1002 error = ext2_dirrewrite(dp, ip, tcnp); 1003 if (error) 1004 goto bad; 1005 /* 1006 * If the target directory is in the same 1007 * directory as the source directory, 1008 * decrement the link count on the parent 1009 * of the target directory. 1010 */ 1011 if (doingdirectory && !newparent) { 1012 dp->i_nlink--; 1013 dp->i_flag |= IN_CHANGE; 1014 } 1015 vput(tdvp); 1016 /* 1017 * Adjust the link count of the target to 1018 * reflect the dirrewrite above. If this is 1019 * a directory it is empty and there are 1020 * no links to it, so we can squash the inode and 1021 * any space associated with it. We disallowed 1022 * renaming over top of a directory with links to 1023 * it above, as the remaining link would point to 1024 * a directory without "." or ".." entries. 1025 */ 1026 xp->i_nlink--; 1027 if (doingdirectory) { 1028 if (--xp->i_nlink != 0) 1029 panic("ext2_rename: linked directory"); 1030 error = ext2_truncate(tvp, (off_t)0, IO_SYNC, 1031 tcnp->cn_cred, tcnp->cn_thread); 1032 } 1033 xp->i_flag |= IN_CHANGE; 1034 vput(tvp); 1035 xp = NULL; 1036 } 1037 1038 /* 1039 * 3) Unlink the source. 1040 */ 1041 fcnp->cn_flags &= ~MODMASK; 1042 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1043 VREF(fdvp); 1044 error = relookup(fdvp, &fvp, fcnp); 1045 if (error == 0) 1046 vrele(fdvp); 1047 if (fvp != NULL) { 1048 xp = VTOI(fvp); 1049 dp = VTOI(fdvp); 1050 } else { 1051 /* 1052 * From name has disappeared. 1053 */ 1054 if (doingdirectory) 1055 panic("ext2_rename: lost dir entry"); 1056 vrele(ap->a_fvp); 1057 return (0); 1058 } 1059 /* 1060 * Ensure that the directory entry still exists and has not 1061 * changed while the new name has been entered. If the source is 1062 * a file then the entry may have been unlinked or renamed. In 1063 * either case there is no further work to be done. If the source 1064 * is a directory then it cannot have been rmdir'ed; its link 1065 * count of three would cause a rmdir to fail with ENOTEMPTY. 1066 * The IN_RENAME flag ensures that it cannot be moved by another 1067 * rename. 1068 */ 1069 if (xp != ip) { 1070 if (doingdirectory) 1071 panic("ext2_rename: lost dir entry"); 1072 } else { 1073 /* 1074 * If the source is a directory with a 1075 * new parent, the link count of the old 1076 * parent directory must be decremented 1077 * and ".." set to point to the new parent. 1078 */ 1079 if (doingdirectory && newparent) { 1080 dp->i_nlink--; 1081 dp->i_flag |= IN_CHANGE; 1082 error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf, 1083 sizeof(struct dirtemplate), (off_t)0, 1084 UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK, 1085 tcnp->cn_cred, NOCRED, NULL, NULL); 1086 if (error == 0) { 1087 /* Like ufs little-endian: */ 1088 namlen = dirbuf.dotdot_type; 1089 if (namlen != 2 || 1090 dirbuf.dotdot_name[0] != '.' || 1091 dirbuf.dotdot_name[1] != '.') { 1092 ext2_dirbad(xp, (doff_t)12, 1093 "rename: mangled dir"); 1094 } else { 1095 dirbuf.dotdot_ino = newparent; 1096 (void) vn_rdwr(UIO_WRITE, fvp, 1097 (caddr_t)&dirbuf, 1098 sizeof(struct dirtemplate), 1099 (off_t)0, UIO_SYSSPACE, 1100 IO_NODELOCKED | IO_SYNC | 1101 IO_NOMACCHECK, tcnp->cn_cred, 1102 NOCRED, NULL, NULL); 1103 cache_purge(fdvp); 1104 } 1105 } 1106 } 1107 error = ext2_dirremove(fdvp, fcnp); 1108 if (!error) { 1109 xp->i_nlink--; 1110 xp->i_flag |= IN_CHANGE; 1111 } 1112 xp->i_flag &= ~IN_RENAME; 1113 } 1114 if (dp) 1115 vput(fdvp); 1116 if (xp) 1117 vput(fvp); 1118 vrele(ap->a_fvp); 1119 return (error); 1120 1121 bad: 1122 if (xp) 1123 vput(ITOV(xp)); 1124 vput(ITOV(dp)); 1125 out: 1126 if (doingdirectory) 1127 ip->i_flag &= ~IN_RENAME; 1128 if (vn_lock(fvp, LK_EXCLUSIVE) == 0) { 1129 ip->i_nlink--; 1130 ip->i_flag |= IN_CHANGE; 1131 ip->i_flag &= ~IN_RENAME; 1132 vput(fvp); 1133 } else 1134 vrele(fvp); 1135 return (error); 1136 } 1137 1138 /* 1139 * Mkdir system call 1140 */ 1141 static int 1142 ext2_mkdir(ap) 1143 struct vop_mkdir_args /* { 1144 struct vnode *a_dvp; 1145 struct vnode **a_vpp; 1146 struct componentname *a_cnp; 1147 struct vattr *a_vap; 1148 } */ *ap; 1149 { 1150 struct vnode *dvp = ap->a_dvp; 1151 struct vattr *vap = ap->a_vap; 1152 struct componentname *cnp = ap->a_cnp; 1153 struct inode *ip, *dp; 1154 struct vnode *tvp; 1155 struct dirtemplate dirtemplate, *dtp; 1156 int error, dmode; 1157 1158 #ifdef DIAGNOSTIC 1159 if ((cnp->cn_flags & HASBUF) == 0) 1160 panic("ext2_mkdir: no name"); 1161 #endif 1162 dp = VTOI(dvp); 1163 if ((nlink_t)dp->i_nlink >= LINK_MAX) { 1164 error = EMLINK; 1165 goto out; 1166 } 1167 dmode = vap->va_mode & 0777; 1168 dmode |= IFDIR; 1169 /* 1170 * Must simulate part of ext2_makeinode here to acquire the inode, 1171 * but not have it entered in the parent directory. The entry is 1172 * made later after writing "." and ".." entries. 1173 */ 1174 error = ext2_valloc(dvp, dmode, cnp->cn_cred, &tvp); 1175 if (error) 1176 goto out; 1177 ip = VTOI(tvp); 1178 ip->i_gid = dp->i_gid; 1179 #ifdef SUIDDIR 1180 { 1181 /* 1182 * if we are hacking owners here, (only do this where told to) 1183 * and we are not giving it TOO root, (would subvert quotas) 1184 * then go ahead and give it to the other user. 1185 * The new directory also inherits the SUID bit. 1186 * If user's UID and dir UID are the same, 1187 * 'give it away' so that the SUID is still forced on. 1188 */ 1189 if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) && 1190 (dp->i_mode & ISUID) && dp->i_uid) { 1191 dmode |= ISUID; 1192 ip->i_uid = dp->i_uid; 1193 } else { 1194 ip->i_uid = cnp->cn_cred->cr_uid; 1195 } 1196 } 1197 #else 1198 ip->i_uid = cnp->cn_cred->cr_uid; 1199 #endif 1200 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1201 ip->i_mode = dmode; 1202 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ 1203 ip->i_nlink = 2; 1204 if (cnp->cn_flags & ISWHITEOUT) 1205 ip->i_flags |= UF_OPAQUE; 1206 error = ext2_update(tvp, 1); 1207 1208 /* 1209 * Bump link count in parent directory 1210 * to reflect work done below. Should 1211 * be done before reference is created 1212 * so reparation is possible if we crash. 1213 */ 1214 dp->i_nlink++; 1215 dp->i_flag |= IN_CHANGE; 1216 error = ext2_update(dvp, !DOINGASYNC(dvp)); 1217 if (error) 1218 goto bad; 1219 1220 /* Initialize directory with "." and ".." from static template. */ 1221 if (EXT2_HAS_INCOMPAT_FEATURE(ip->i_e2fs, 1222 EXT2F_INCOMPAT_FTYPE)) 1223 dtp = &mastertemplate; 1224 else 1225 dtp = &omastertemplate; 1226 dirtemplate = *dtp; 1227 dirtemplate.dot_ino = ip->i_number; 1228 dirtemplate.dotdot_ino = dp->i_number; 1229 /* note that in ext2 DIRBLKSIZ == blocksize, not DEV_BSIZE 1230 * so let's just redefine it - for this function only 1231 */ 1232 #undef DIRBLKSIZ 1233 #define DIRBLKSIZ VTOI(dvp)->i_e2fs->e2fs_bsize 1234 dirtemplate.dotdot_reclen = DIRBLKSIZ - 12; 1235 error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate, 1236 sizeof(dirtemplate), (off_t)0, UIO_SYSSPACE, 1237 IO_NODELOCKED | IO_SYNC | IO_NOMACCHECK, cnp->cn_cred, NOCRED, 1238 NULL, NULL); 1239 if (error) { 1240 dp->i_nlink--; 1241 dp->i_flag |= IN_CHANGE; 1242 goto bad; 1243 } 1244 if (DIRBLKSIZ > VFSTOEXT2(dvp->v_mount)->um_mountp->mnt_stat.f_bsize) 1245 /* XXX should grow with balloc() */ 1246 panic("ext2_mkdir: blksize"); 1247 else { 1248 ip->i_size = DIRBLKSIZ; 1249 ip->i_flag |= IN_CHANGE; 1250 } 1251 1252 /* Directory set up, now install its entry in the parent directory. */ 1253 error = ext2_direnter(ip, dvp, cnp); 1254 if (error) { 1255 dp->i_nlink--; 1256 dp->i_flag |= IN_CHANGE; 1257 } 1258 bad: 1259 /* 1260 * No need to do an explicit VOP_TRUNCATE here, vrele will do this 1261 * for us because we set the link count to 0. 1262 */ 1263 if (error) { 1264 ip->i_nlink = 0; 1265 ip->i_flag |= IN_CHANGE; 1266 vput(tvp); 1267 } else 1268 *ap->a_vpp = tvp; 1269 out: 1270 return (error); 1271 #undef DIRBLKSIZ 1272 #define DIRBLKSIZ DEV_BSIZE 1273 } 1274 1275 /* 1276 * Rmdir system call. 1277 */ 1278 static int 1279 ext2_rmdir(ap) 1280 struct vop_rmdir_args /* { 1281 struct vnode *a_dvp; 1282 struct vnode *a_vp; 1283 struct componentname *a_cnp; 1284 } */ *ap; 1285 { 1286 struct vnode *vp = ap->a_vp; 1287 struct vnode *dvp = ap->a_dvp; 1288 struct componentname *cnp = ap->a_cnp; 1289 struct inode *ip, *dp; 1290 int error; 1291 1292 ip = VTOI(vp); 1293 dp = VTOI(dvp); 1294 1295 /* 1296 * Verify the directory is empty (and valid). 1297 * (Rmdir ".." won't be valid since 1298 * ".." will contain a reference to 1299 * the current directory and thus be 1300 * non-empty.) 1301 */ 1302 error = 0; 1303 if (ip->i_nlink != 2 || !ext2_dirempty(ip, dp->i_number, cnp->cn_cred)) { 1304 error = ENOTEMPTY; 1305 goto out; 1306 } 1307 if ((dp->i_flags & APPEND) 1308 || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) { 1309 error = EPERM; 1310 goto out; 1311 } 1312 /* 1313 * Delete reference to directory before purging 1314 * inode. If we crash in between, the directory 1315 * will be reattached to lost+found, 1316 */ 1317 error = ext2_dirremove(dvp, cnp); 1318 if (error) 1319 goto out; 1320 dp->i_nlink--; 1321 dp->i_flag |= IN_CHANGE; 1322 cache_purge(dvp); 1323 VOP_UNLOCK(dvp, 0); 1324 /* 1325 * Truncate inode. The only stuff left 1326 * in the directory is "." and "..". The 1327 * "." reference is inconsequential since 1328 * we're quashing it. The ".." reference 1329 * has already been adjusted above. We've 1330 * removed the "." reference and the reference 1331 * in the parent directory, but there may be 1332 * other hard links so decrement by 2 and 1333 * worry about them later. 1334 */ 1335 ip->i_nlink -= 2; 1336 error = ext2_truncate(vp, (off_t)0, IO_SYNC, cnp->cn_cred, 1337 cnp->cn_thread); 1338 cache_purge(ITOV(ip)); 1339 if (vn_lock(dvp, LK_EXCLUSIVE | LK_NOWAIT) != 0) { 1340 VOP_UNLOCK(vp, 0); 1341 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 1342 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1343 } 1344 out: 1345 return (error); 1346 } 1347 1348 /* 1349 * symlink -- make a symbolic link 1350 */ 1351 static int 1352 ext2_symlink(ap) 1353 struct vop_symlink_args /* { 1354 struct vnode *a_dvp; 1355 struct vnode **a_vpp; 1356 struct componentname *a_cnp; 1357 struct vattr *a_vap; 1358 char *a_target; 1359 } */ *ap; 1360 { 1361 struct vnode *vp, **vpp = ap->a_vpp; 1362 struct inode *ip; 1363 int len, error; 1364 1365 error = ext2_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, 1366 vpp, ap->a_cnp); 1367 if (error) 1368 return (error); 1369 vp = *vpp; 1370 len = strlen(ap->a_target); 1371 if (len < vp->v_mount->mnt_maxsymlinklen) { 1372 ip = VTOI(vp); 1373 bcopy(ap->a_target, (char *)ip->i_shortlink, len); 1374 ip->i_size = len; 1375 ip->i_flag |= IN_CHANGE | IN_UPDATE; 1376 } else 1377 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, 1378 UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK, 1379 ap->a_cnp->cn_cred, NOCRED, NULL, NULL); 1380 if (error) 1381 vput(vp); 1382 return (error); 1383 } 1384 1385 /* 1386 * Return target name of a symbolic link 1387 */ 1388 static int 1389 ext2_readlink(ap) 1390 struct vop_readlink_args /* { 1391 struct vnode *a_vp; 1392 struct uio *a_uio; 1393 struct ucred *a_cred; 1394 } */ *ap; 1395 { 1396 struct vnode *vp = ap->a_vp; 1397 struct inode *ip = VTOI(vp); 1398 int isize; 1399 1400 isize = ip->i_size; 1401 if (isize < vp->v_mount->mnt_maxsymlinklen) { 1402 uiomove((char *)ip->i_shortlink, isize, ap->a_uio); 1403 return (0); 1404 } 1405 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); 1406 } 1407 1408 /* 1409 * Calculate the logical to physical mapping if not done already, 1410 * then call the device strategy routine. 1411 * 1412 * In order to be able to swap to a file, the ext2_bmaparray() operation may not 1413 * deadlock on memory. See ext2_bmap() for details. 1414 */ 1415 static int 1416 ext2_strategy(ap) 1417 struct vop_strategy_args /* { 1418 struct vnode *a_vp; 1419 struct buf *a_bp; 1420 } */ *ap; 1421 { 1422 struct buf *bp = ap->a_bp; 1423 struct vnode *vp = ap->a_vp; 1424 struct inode *ip; 1425 struct bufobj *bo; 1426 int32_t blkno; 1427 int error; 1428 1429 ip = VTOI(vp); 1430 if (vp->v_type == VBLK || vp->v_type == VCHR) 1431 panic("ext2_strategy: spec"); 1432 if (bp->b_blkno == bp->b_lblkno) { 1433 error = ext2_bmaparray(vp, bp->b_lblkno, &blkno, NULL, NULL); 1434 bp->b_blkno = blkno; 1435 if (error) { 1436 bp->b_error = error; 1437 bp->b_ioflags |= BIO_ERROR; 1438 bufdone(bp); 1439 return (0); 1440 } 1441 if ((long)bp->b_blkno == -1) 1442 vfs_bio_clrbuf(bp); 1443 } 1444 if ((long)bp->b_blkno == -1) { 1445 bufdone(bp); 1446 return (0); 1447 } 1448 bp->b_iooffset = dbtob(bp->b_blkno); 1449 bo = VFSTOEXT2(vp->v_mount)->um_bo; 1450 BO_STRATEGY(bo, bp); 1451 return (0); 1452 } 1453 1454 /* 1455 * Print out the contents of an inode. 1456 */ 1457 static int 1458 ext2_print(ap) 1459 struct vop_print_args /* { 1460 struct vnode *a_vp; 1461 } */ *ap; 1462 { 1463 struct vnode *vp = ap->a_vp; 1464 struct inode *ip = VTOI(vp); 1465 1466 vn_printf(ip->i_devvp, "\tino %lu", (u_long)ip->i_number); 1467 if (vp->v_type == VFIFO) 1468 fifo_printinfo(vp); 1469 printf("\n"); 1470 return (0); 1471 } 1472 1473 /* 1474 * Close wrapper for fifos. 1475 * 1476 * Update the times on the inode then do device close. 1477 */ 1478 static int 1479 ext2fifo_close(ap) 1480 struct vop_close_args /* { 1481 struct vnode *a_vp; 1482 int a_fflag; 1483 struct ucred *a_cred; 1484 struct thread *a_td; 1485 } */ *ap; 1486 { 1487 struct vnode *vp = ap->a_vp; 1488 1489 VI_LOCK(vp); 1490 if (vp->v_usecount > 1) 1491 ext2_itimes_locked(vp); 1492 VI_UNLOCK(vp); 1493 return (fifo_specops.vop_close(ap)); 1494 } 1495 1496 /* 1497 * Kqfilter wrapper for fifos. 1498 * 1499 * Fall through to ext2 kqfilter routines if needed 1500 */ 1501 static int 1502 ext2fifo_kqfilter(ap) 1503 struct vop_kqfilter_args *ap; 1504 { 1505 int error; 1506 1507 error = fifo_specops.vop_kqfilter(ap); 1508 if (error) 1509 error = vfs_kqfilter(ap); 1510 return (error); 1511 } 1512 1513 /* 1514 * Return POSIX pathconf information applicable to ext2 filesystems. 1515 */ 1516 static int 1517 ext2_pathconf(ap) 1518 struct vop_pathconf_args /* { 1519 struct vnode *a_vp; 1520 int a_name; 1521 int *a_retval; 1522 } */ *ap; 1523 { 1524 1525 switch (ap->a_name) { 1526 case _PC_LINK_MAX: 1527 *ap->a_retval = LINK_MAX; 1528 return (0); 1529 case _PC_NAME_MAX: 1530 *ap->a_retval = NAME_MAX; 1531 return (0); 1532 case _PC_PATH_MAX: 1533 *ap->a_retval = PATH_MAX; 1534 return (0); 1535 case _PC_PIPE_BUF: 1536 *ap->a_retval = PIPE_BUF; 1537 return (0); 1538 case _PC_CHOWN_RESTRICTED: 1539 *ap->a_retval = 1; 1540 return (0); 1541 case _PC_NO_TRUNC: 1542 *ap->a_retval = 1; 1543 return (0); 1544 default: 1545 return (EINVAL); 1546 } 1547 /* NOTREACHED */ 1548 } 1549 1550 /* 1551 * Vnode pointer to File handle 1552 */ 1553 /* ARGSUSED */ 1554 static int 1555 ext2_vptofh(ap) 1556 struct vop_vptofh_args /* { 1557 struct vnode *a_vp; 1558 struct fid *a_fhp; 1559 } */ *ap; 1560 { 1561 struct inode *ip; 1562 struct ufid *ufhp; 1563 1564 ip = VTOI(ap->a_vp); 1565 ufhp = (struct ufid *)ap->a_fhp; 1566 ufhp->ufid_len = sizeof(struct ufid); 1567 ufhp->ufid_ino = ip->i_number; 1568 ufhp->ufid_gen = ip->i_gen; 1569 return (0); 1570 } 1571 1572 /* 1573 * Initialize the vnode associated with a new inode, handle aliased 1574 * vnodes. 1575 */ 1576 int 1577 ext2_vinit(mntp, fifoops, vpp) 1578 struct mount *mntp; 1579 struct vop_vector *fifoops; 1580 struct vnode **vpp; 1581 { 1582 struct inode *ip; 1583 struct vnode *vp; 1584 1585 vp = *vpp; 1586 ip = VTOI(vp); 1587 vp->v_type = IFTOVT(ip->i_mode); 1588 if (vp->v_type == VFIFO) 1589 vp->v_op = fifoops; 1590 1591 if (ip->i_number == EXT2_ROOTINO) 1592 vp->v_vflag |= VV_ROOT; 1593 ip->i_modrev = init_va_filerev(); 1594 *vpp = vp; 1595 return (0); 1596 } 1597 1598 /* 1599 * Allocate a new inode. 1600 */ 1601 static int 1602 ext2_makeinode(mode, dvp, vpp, cnp) 1603 int mode; 1604 struct vnode *dvp; 1605 struct vnode **vpp; 1606 struct componentname *cnp; 1607 { 1608 struct inode *ip, *pdir; 1609 struct vnode *tvp; 1610 int error; 1611 1612 pdir = VTOI(dvp); 1613 #ifdef DIAGNOSTIC 1614 if ((cnp->cn_flags & HASBUF) == 0) 1615 panic("ext2_makeinode: no name"); 1616 #endif 1617 *vpp = NULL; 1618 if ((mode & IFMT) == 0) 1619 mode |= IFREG; 1620 1621 error = ext2_valloc(dvp, mode, cnp->cn_cred, &tvp); 1622 if (error) { 1623 return (error); 1624 } 1625 ip = VTOI(tvp); 1626 ip->i_gid = pdir->i_gid; 1627 #ifdef SUIDDIR 1628 { 1629 /* 1630 * if we are 1631 * not the owner of the directory, 1632 * and we are hacking owners here, (only do this where told to) 1633 * and we are not giving it TOO root, (would subvert quotas) 1634 * then go ahead and give it to the other user. 1635 * Note that this drops off the execute bits for security. 1636 */ 1637 if ( (dvp->v_mount->mnt_flag & MNT_SUIDDIR) && 1638 (pdir->i_mode & ISUID) && 1639 (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) { 1640 ip->i_uid = pdir->i_uid; 1641 mode &= ~07111; 1642 } else { 1643 ip->i_uid = cnp->cn_cred->cr_uid; 1644 } 1645 } 1646 #else 1647 ip->i_uid = cnp->cn_cred->cr_uid; 1648 #endif 1649 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1650 ip->i_mode = mode; 1651 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ 1652 ip->i_nlink = 1; 1653 if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred)) { 1654 if (priv_check_cred(cnp->cn_cred, PRIV_VFS_RETAINSUGID, 0)) 1655 ip->i_mode &= ~ISGID; 1656 } 1657 1658 if (cnp->cn_flags & ISWHITEOUT) 1659 ip->i_flags |= UF_OPAQUE; 1660 1661 /* 1662 * Make sure inode goes to disk before directory entry. 1663 */ 1664 error = ext2_update(tvp, !DOINGASYNC(tvp)); 1665 if (error) 1666 goto bad; 1667 error = ext2_direnter(ip, dvp, cnp); 1668 if (error) 1669 goto bad; 1670 1671 *vpp = tvp; 1672 return (0); 1673 1674 bad: 1675 /* 1676 * Write error occurred trying to update the inode 1677 * or the directory so must deallocate the inode. 1678 */ 1679 ip->i_nlink = 0; 1680 ip->i_flag |= IN_CHANGE; 1681 vput(tvp); 1682 return (error); 1683 } 1684 1685 /* 1686 * Vnode op for reading. 1687 */ 1688 static int 1689 ext2_read(ap) 1690 struct vop_read_args /* { 1691 struct vnode *a_vp; 1692 struct uio *a_uio; 1693 int a_ioflag; 1694 struct ucred *a_cred; 1695 } */ *ap; 1696 { 1697 struct vnode *vp; 1698 struct inode *ip; 1699 struct uio *uio; 1700 struct m_ext2fs *fs; 1701 struct buf *bp; 1702 daddr_t lbn, nextlbn; 1703 off_t bytesinfile; 1704 long size, xfersize, blkoffset; 1705 int error, orig_resid, seqcount; 1706 int ioflag; 1707 1708 vp = ap->a_vp; 1709 uio = ap->a_uio; 1710 ioflag = ap->a_ioflag; 1711 1712 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 1713 ip = VTOI(vp); 1714 1715 #ifdef INVARIANTS 1716 if (uio->uio_rw != UIO_READ) 1717 panic("%s: mode", "ext2_read"); 1718 1719 if (vp->v_type == VLNK) { 1720 if ((int)ip->i_size < vp->v_mount->mnt_maxsymlinklen) 1721 panic("%s: short symlink", "ext2_read"); 1722 } else if (vp->v_type != VREG && vp->v_type != VDIR) 1723 panic("%s: type %d", "ext2_read", vp->v_type); 1724 #endif 1725 orig_resid = uio->uio_resid; 1726 KASSERT(orig_resid >= 0, ("ext2_read: uio->uio_resid < 0")); 1727 if (orig_resid == 0) 1728 return (0); 1729 KASSERT(uio->uio_offset >= 0, ("ext2_read: uio->uio_offset < 0")); 1730 fs = ip->i_e2fs; 1731 if (uio->uio_offset < ip->i_size && 1732 uio->uio_offset >= fs->e2fs_maxfilesize) 1733 return (EOVERFLOW); 1734 1735 for (error = 0, bp = NULL; uio->uio_resid > 0; bp = NULL) { 1736 if ((bytesinfile = ip->i_size - uio->uio_offset) <= 0) 1737 break; 1738 lbn = lblkno(fs, uio->uio_offset); 1739 nextlbn = lbn + 1; 1740 size = blksize(fs, ip, lbn); 1741 blkoffset = blkoff(fs, uio->uio_offset); 1742 1743 xfersize = fs->e2fs_fsize - blkoffset; 1744 if (uio->uio_resid < xfersize) 1745 xfersize = uio->uio_resid; 1746 if (bytesinfile < xfersize) 1747 xfersize = bytesinfile; 1748 1749 if (lblktosize(fs, nextlbn) >= ip->i_size) 1750 error = bread(vp, lbn, size, NOCRED, &bp); 1751 else if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) 1752 error = cluster_read(vp, ip->i_size, lbn, size, 1753 NOCRED, blkoffset + uio->uio_resid, seqcount, &bp); 1754 else if (seqcount > 1) { 1755 int nextsize = blksize(fs, ip, nextlbn); 1756 error = breadn(vp, lbn, 1757 size, &nextlbn, &nextsize, 1, NOCRED, &bp); 1758 } else 1759 error = bread(vp, lbn, size, NOCRED, &bp); 1760 if (error) { 1761 brelse(bp); 1762 bp = NULL; 1763 break; 1764 } 1765 1766 /* 1767 * If IO_DIRECT then set B_DIRECT for the buffer. This 1768 * will cause us to attempt to release the buffer later on 1769 * and will cause the buffer cache to attempt to free the 1770 * underlying pages. 1771 */ 1772 if (ioflag & IO_DIRECT) 1773 bp->b_flags |= B_DIRECT; 1774 1775 /* 1776 * We should only get non-zero b_resid when an I/O error 1777 * has occurred, which should cause us to break above. 1778 * However, if the short read did not cause an error, 1779 * then we want to ensure that we do not uiomove bad 1780 * or uninitialized data. 1781 */ 1782 size -= bp->b_resid; 1783 if (size < xfersize) { 1784 if (size == 0) 1785 break; 1786 xfersize = size; 1787 } 1788 error = uiomove((char *)bp->b_data + blkoffset, 1789 (int)xfersize, uio); 1790 if (error) 1791 break; 1792 1793 if (ioflag & (IO_VMIO|IO_DIRECT)) { 1794 /* 1795 * If it's VMIO or direct I/O, then we don't 1796 * need the buf, mark it available for 1797 * freeing. If it's non-direct VMIO, the VM has 1798 * the data. 1799 */ 1800 bp->b_flags |= B_RELBUF; 1801 brelse(bp); 1802 } else { 1803 /* 1804 * Otherwise let whoever 1805 * made the request take care of 1806 * freeing it. We just queue 1807 * it onto another list. 1808 */ 1809 bqrelse(bp); 1810 } 1811 } 1812 1813 /* 1814 * This can only happen in the case of an error 1815 * because the loop above resets bp to NULL on each iteration 1816 * and on normal completion has not set a new value into it. 1817 * so it must have come from a 'break' statement 1818 */ 1819 if (bp != NULL) { 1820 if (ioflag & (IO_VMIO|IO_DIRECT)) { 1821 bp->b_flags |= B_RELBUF; 1822 brelse(bp); 1823 } else { 1824 bqrelse(bp); 1825 } 1826 } 1827 1828 if ((error == 0 || uio->uio_resid != orig_resid) && 1829 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1830 ip->i_flag |= IN_ACCESS; 1831 return (error); 1832 } 1833 1834 /* 1835 * Vnode op for writing. 1836 */ 1837 static int 1838 ext2_write(ap) 1839 struct vop_write_args /* { 1840 struct vnode *a_vp; 1841 struct uio *a_uio; 1842 int a_ioflag; 1843 struct ucred *a_cred; 1844 } */ *ap; 1845 { 1846 struct vnode *vp; 1847 struct uio *uio; 1848 struct inode *ip; 1849 struct m_ext2fs *fs; 1850 struct buf *bp; 1851 daddr_t lbn; 1852 off_t osize; 1853 int blkoffset, error, flags, ioflag, resid, size, seqcount, xfersize; 1854 1855 ioflag = ap->a_ioflag; 1856 uio = ap->a_uio; 1857 vp = ap->a_vp; 1858 1859 seqcount = ioflag >> IO_SEQSHIFT; 1860 ip = VTOI(vp); 1861 1862 #ifdef INVARIANTS 1863 if (uio->uio_rw != UIO_WRITE) 1864 panic("%s: mode", "ext2_write"); 1865 #endif 1866 1867 switch (vp->v_type) { 1868 case VREG: 1869 if (ioflag & IO_APPEND) 1870 uio->uio_offset = ip->i_size; 1871 if ((ip->i_flags & APPEND) && uio->uio_offset != ip->i_size) 1872 return (EPERM); 1873 /* FALLTHROUGH */ 1874 case VLNK: 1875 break; 1876 case VDIR: 1877 /* XXX differs from ffs -- this is called from ext2_mkdir(). */ 1878 if ((ioflag & IO_SYNC) == 0) 1879 panic("ext2_write: nonsync dir write"); 1880 break; 1881 default: 1882 panic("ext2_write: type %p %d (%jd,%jd)", (void *)vp, 1883 vp->v_type, (intmax_t)uio->uio_offset, 1884 (intmax_t)uio->uio_resid); 1885 } 1886 1887 KASSERT(uio->uio_resid >= 0, ("ext2_write: uio->uio_resid < 0")); 1888 KASSERT(uio->uio_offset >= 0, ("ext2_write: uio->uio_offset < 0")); 1889 fs = ip->i_e2fs; 1890 if ((uoff_t)uio->uio_offset + uio->uio_resid > fs->e2fs_maxfilesize) 1891 return (EFBIG); 1892 /* 1893 * Maybe this should be above the vnode op call, but so long as 1894 * file servers have no limits, I don't think it matters. 1895 */ 1896 if (vn_rlimit_fsize(vp, uio, uio->uio_td)) 1897 return (EFBIG); 1898 1899 resid = uio->uio_resid; 1900 osize = ip->i_size; 1901 if (seqcount > BA_SEQMAX) 1902 flags = BA_SEQMAX << BA_SEQSHIFT; 1903 else 1904 flags = seqcount << BA_SEQSHIFT; 1905 if ((ioflag & IO_SYNC) && !DOINGASYNC(vp)) 1906 flags |= IO_SYNC; 1907 1908 for (error = 0; uio->uio_resid > 0;) { 1909 lbn = lblkno(fs, uio->uio_offset); 1910 blkoffset = blkoff(fs, uio->uio_offset); 1911 xfersize = fs->e2fs_fsize - blkoffset; 1912 if (uio->uio_resid < xfersize) 1913 xfersize = uio->uio_resid; 1914 if (uio->uio_offset + xfersize > ip->i_size) 1915 vnode_pager_setsize(vp, uio->uio_offset + xfersize); 1916 1917 /* 1918 * We must perform a read-before-write if the transfer size 1919 * does not cover the entire buffer. 1920 */ 1921 if (fs->e2fs_bsize > xfersize) 1922 flags |= BA_CLRBUF; 1923 else 1924 flags &= ~BA_CLRBUF; 1925 error = ext2_balloc(ip, lbn, blkoffset + xfersize, 1926 ap->a_cred, &bp, flags); 1927 if (error != 0) 1928 break; 1929 1930 /* 1931 * If the buffer is not valid and we did not clear garbage 1932 * out above, we have to do so here even though the write 1933 * covers the entire buffer in order to avoid a mmap()/write 1934 * race where another process may see the garbage prior to 1935 * the uiomove() for a write replacing it. 1936 */ 1937 if ((bp->b_flags & B_CACHE) == 0 && fs->e2fs_bsize <= xfersize) 1938 vfs_bio_clrbuf(bp); 1939 if ((ioflag & (IO_SYNC|IO_INVAL)) == (IO_SYNC|IO_INVAL)) 1940 bp->b_flags |= B_NOCACHE; 1941 if (uio->uio_offset + xfersize > ip->i_size) 1942 ip->i_size = uio->uio_offset + xfersize; 1943 size = blksize(fs, ip, lbn) - bp->b_resid; 1944 if (size < xfersize) 1945 xfersize = size; 1946 1947 error = 1948 uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio); 1949 if (ioflag & (IO_VMIO|IO_DIRECT)) { 1950 bp->b_flags |= B_RELBUF; 1951 } 1952 1953 /* 1954 * If IO_SYNC each buffer is written synchronously. Otherwise 1955 * if we have a severe page deficiency write the buffer 1956 * asynchronously. Otherwise try to cluster, and if that 1957 * doesn't do it then either do an async write (if O_DIRECT), 1958 * or a delayed write (if not). 1959 */ 1960 if (ioflag & IO_SYNC) { 1961 (void)bwrite(bp); 1962 } else if (vm_page_count_severe() || 1963 buf_dirty_count_severe() || 1964 (ioflag & IO_ASYNC)) { 1965 bp->b_flags |= B_CLUSTEROK; 1966 bawrite(bp); 1967 } else if (xfersize + blkoffset == fs->e2fs_fsize) { 1968 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) { 1969 bp->b_flags |= B_CLUSTEROK; 1970 cluster_write(vp, bp, ip->i_size, seqcount); 1971 } else { 1972 bawrite(bp); 1973 } 1974 } else if (ioflag & IO_DIRECT) { 1975 bp->b_flags |= B_CLUSTEROK; 1976 bawrite(bp); 1977 } else { 1978 bp->b_flags |= B_CLUSTEROK; 1979 bdwrite(bp); 1980 } 1981 if (error || xfersize == 0) 1982 break; 1983 } 1984 /* 1985 * If we successfully wrote any data, and we are not the superuser 1986 * we clear the setuid and setgid bits as a precaution against 1987 * tampering. 1988 */ 1989 if ((ip->i_mode & (ISUID | ISGID)) && resid > uio->uio_resid && 1990 ap->a_cred) { 1991 if (priv_check_cred(ap->a_cred, PRIV_VFS_RETAINSUGID, 0)) 1992 ip->i_mode &= ~(ISUID | ISGID); 1993 } 1994 if (error) { 1995 if (ioflag & IO_UNIT) { 1996 (void)ext2_truncate(vp, osize, 1997 ioflag & IO_SYNC, ap->a_cred, uio->uio_td); 1998 uio->uio_offset -= resid - uio->uio_resid; 1999 uio->uio_resid = resid; 2000 } 2001 } 2002 if (uio->uio_resid != resid) { 2003 ip->i_flag |= IN_CHANGE | IN_UPDATE; 2004 if (ioflag & IO_SYNC) 2005 error = ext2_update(vp, 1); 2006 } 2007 return (error); 2008 } 2009