1 /* $NetBSD: ufs_vnops.c,v 1.86 2002/05/14 17:37:52 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1993, 1995 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 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 8.28 (Berkeley) 7/31/95 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: ufs_vnops.c,v 1.86 2002/05/14 17:37:52 mycroft Exp $"); 45 46 #include "opt_quota.h" 47 #include "fs_lfs.h" 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/namei.h> 52 #include <sys/resourcevar.h> 53 #include <sys/kernel.h> 54 #include <sys/file.h> 55 #include <sys/stat.h> 56 #include <sys/buf.h> 57 #include <sys/proc.h> 58 #include <sys/mount.h> 59 #include <sys/vnode.h> 60 #include <sys/malloc.h> 61 #include <sys/dirent.h> 62 #include <sys/lockf.h> 63 64 #include <miscfs/specfs/specdev.h> 65 #include <miscfs/fifofs/fifo.h> 66 67 #include <ufs/ufs/quota.h> 68 #include <ufs/ufs/inode.h> 69 #include <ufs/ufs/dir.h> 70 #include <ufs/ufs/ufsmount.h> 71 #include <ufs/ufs/ufs_bswap.h> 72 #include <ufs/ufs/ufs_extern.h> 73 #include <ufs/ext2fs/ext2fs_extern.h> 74 #include <ufs/lfs/lfs_extern.h> 75 76 static int ufs_chmod(struct vnode *, int, struct ucred *, struct proc *); 77 static int ufs_chown(struct vnode *, uid_t, gid_t, struct ucred *, 78 struct proc *); 79 80 union _qcvt { 81 int64_t qcvt; 82 int32_t val[2]; 83 }; 84 85 #define SETHIGH(q, h) \ 86 do { \ 87 union _qcvt tmp; \ 88 tmp.qcvt = (q); \ 89 tmp.val[_QUAD_HIGHWORD] = (h); \ 90 (q) = tmp.qcvt; \ 91 } while (0) 92 93 #define SETLOW(q, l) \ 94 do { \ 95 union _qcvt tmp; \ 96 tmp.qcvt = (q); \ 97 tmp.val[_QUAD_LOWWORD] = (l); \ 98 (q) = tmp.qcvt; \ 99 } while (0) 100 101 /* 102 * A virgin directory (no blushing please). 103 */ 104 static struct dirtemplate mastertemplate = { 105 0, 12, DT_DIR, 1, ".", 106 0, DIRBLKSIZ - 12, DT_DIR, 2, ".." 107 }; 108 109 /* 110 * Create a regular file 111 */ 112 int 113 ufs_create(void *v) 114 { 115 struct vop_create_args /* { 116 struct vnode *a_dvp; 117 struct vnode **a_vpp; 118 struct componentname *a_cnp; 119 struct vattr *a_vap; 120 } */ *ap = v; 121 122 return 123 ufs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode), 124 ap->a_dvp, ap->a_vpp, ap->a_cnp); 125 } 126 127 /* 128 * Mknod vnode call 129 */ 130 /* ARGSUSED */ 131 int 132 ufs_mknod(void *v) 133 { 134 struct vop_mknod_args /* { 135 struct vnode *a_dvp; 136 struct vnode **a_vpp; 137 struct componentname *a_cnp; 138 struct vattr *a_vap; 139 } */ *ap = v; 140 struct vattr *vap; 141 struct vnode **vpp; 142 struct inode *ip; 143 int error; 144 struct mount *mp; 145 ino_t ino; 146 147 vap = ap->a_vap; 148 vpp = ap->a_vpp; 149 if ((error = 150 ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), 151 ap->a_dvp, vpp, ap->a_cnp)) != 0) 152 return (error); 153 ip = VTOI(*vpp); 154 mp = (*vpp)->v_mount; 155 ino = ip->i_number; 156 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 157 if (vap->va_rdev != VNOVAL) { 158 /* 159 * Want to be able to use this to make badblock 160 * inodes, so don't truncate the dev number. 161 */ 162 ip->i_ffs_rdev = ufs_rw32(vap->va_rdev, 163 UFS_MPNEEDSWAP(mp)); 164 } 165 /* 166 * Remove inode so that it will be reloaded by VFS_VGET and 167 * checked to see if it is an alias of an existing entry in 168 * the inode cache. 169 */ 170 vput(*vpp); 171 (*vpp)->v_type = VNON; 172 vgone(*vpp); 173 error = VFS_VGET(mp, ino, vpp); 174 if (error != 0) { 175 *vpp = NULL; 176 return (error); 177 } 178 return (0); 179 } 180 181 /* 182 * Open called. 183 * 184 * Nothing to do. 185 */ 186 /* ARGSUSED */ 187 int 188 ufs_open(void *v) 189 { 190 struct vop_open_args /* { 191 struct vnode *a_vp; 192 int a_mode; 193 struct ucred *a_cred; 194 struct proc *a_p; 195 } */ *ap = v; 196 197 /* 198 * Files marked append-only must be opened for appending. 199 */ 200 if ((VTOI(ap->a_vp)->i_ffs_flags & APPEND) && 201 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 202 return (EPERM); 203 return (0); 204 } 205 206 /* 207 * Close called. 208 * 209 * Update the times on the inode. 210 */ 211 /* ARGSUSED */ 212 int 213 ufs_close(void *v) 214 { 215 struct vop_close_args /* { 216 struct vnode *a_vp; 217 int a_fflag; 218 struct ucred *a_cred; 219 struct proc *a_p; 220 } */ *ap = v; 221 struct vnode *vp; 222 struct inode *ip; 223 struct timespec ts; 224 225 vp = ap->a_vp; 226 ip = VTOI(vp); 227 simple_lock(&vp->v_interlock); 228 if (vp->v_usecount > 1) { 229 TIMEVAL_TO_TIMESPEC(&time, &ts); 230 ITIMES(ip, &ts, &ts, &ts); 231 } 232 simple_unlock(&vp->v_interlock); 233 return (0); 234 } 235 236 int 237 ufs_access(void *v) 238 { 239 struct vop_access_args /* { 240 struct vnode *a_vp; 241 int a_mode; 242 struct ucred *a_cred; 243 struct proc *a_p; 244 } */ *ap = v; 245 struct vnode *vp; 246 struct inode *ip; 247 mode_t mode; 248 #ifdef QUOTA 249 int error; 250 #endif 251 252 vp = ap->a_vp; 253 ip = VTOI(vp); 254 mode = ap->a_mode; 255 /* 256 * Disallow write attempts on read-only file systems; 257 * unless the file is a socket, fifo, or a block or 258 * character device resident on the file system. 259 */ 260 if (mode & VWRITE) { 261 switch (vp->v_type) { 262 case VDIR: 263 case VLNK: 264 case VREG: 265 if (vp->v_mount->mnt_flag & MNT_RDONLY) 266 return (EROFS); 267 #ifdef QUOTA 268 if ((error = getinoquota(ip)) != 0) 269 return (error); 270 #endif 271 break; 272 case VBAD: 273 case VBLK: 274 case VCHR: 275 case VSOCK: 276 case VFIFO: 277 case VNON: 278 default: 279 break; 280 } 281 } 282 283 /* If immutable bit set, nobody gets to write it. */ 284 if ((mode & VWRITE) && (ip->i_ffs_flags & IMMUTABLE)) 285 return (EPERM); 286 287 return (vaccess(vp->v_type, ip->i_ffs_mode & ALLPERMS, 288 ip->i_ffs_uid, ip->i_ffs_gid, mode, ap->a_cred)); 289 } 290 291 /* ARGSUSED */ 292 int 293 ufs_getattr(void *v) 294 { 295 struct vop_getattr_args /* { 296 struct vnode *a_vp; 297 struct vattr *a_vap; 298 struct ucred *a_cred; 299 struct proc *a_p; 300 } */ *ap = v; 301 struct vnode *vp; 302 struct inode *ip; 303 struct vattr *vap; 304 struct timespec ts; 305 306 vp = ap->a_vp; 307 ip = VTOI(vp); 308 vap = ap->a_vap; 309 TIMEVAL_TO_TIMESPEC(&time, &ts); 310 ITIMES(ip, &ts, &ts, &ts); 311 /* 312 * Copy from inode table 313 */ 314 vap->va_fsid = ip->i_dev; 315 vap->va_fileid = ip->i_number; 316 vap->va_mode = ip->i_ffs_mode & ALLPERMS; 317 vap->va_nlink = ip->i_ffs_effnlink; 318 vap->va_uid = ip->i_ffs_uid; 319 vap->va_gid = ip->i_ffs_gid; 320 vap->va_rdev = ufs_rw32((dev_t)ip->i_ffs_rdev, 321 UFS_MPNEEDSWAP(vp->v_mount)); 322 vap->va_size = vp->v_size; 323 vap->va_atime.tv_sec = ip->i_ffs_atime; 324 vap->va_atime.tv_nsec = ip->i_ffs_atimensec; 325 vap->va_mtime.tv_sec = ip->i_ffs_mtime; 326 vap->va_mtime.tv_nsec = ip->i_ffs_mtimensec; 327 vap->va_ctime.tv_sec = ip->i_ffs_ctime; 328 vap->va_ctime.tv_nsec = ip->i_ffs_ctimensec; 329 vap->va_flags = ip->i_ffs_flags; 330 vap->va_gen = ip->i_ffs_gen; 331 /* this doesn't belong here */ 332 if (vp->v_type == VBLK) 333 vap->va_blocksize = BLKDEV_IOSIZE; 334 else if (vp->v_type == VCHR) 335 vap->va_blocksize = MAXBSIZE; 336 else 337 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; 338 vap->va_bytes = dbtob((u_quad_t)ip->i_ffs_blocks); 339 vap->va_type = vp->v_type; 340 vap->va_filerev = ip->i_modrev; 341 return (0); 342 } 343 344 /* 345 * Set attribute vnode op. called from several syscalls 346 */ 347 int 348 ufs_setattr(void *v) 349 { 350 struct vop_setattr_args /* { 351 struct vnode *a_vp; 352 struct vattr *a_vap; 353 struct ucred *a_cred; 354 struct proc *a_p; 355 } */ *ap = v; 356 struct vattr *vap; 357 struct vnode *vp; 358 struct inode *ip; 359 struct ucred *cred; 360 struct proc *p; 361 int error; 362 363 vap = ap->a_vap; 364 vp = ap->a_vp; 365 ip = VTOI(vp); 366 cred = ap->a_cred; 367 p = ap->a_p; 368 369 /* 370 * Check for unsettable attributes. 371 */ 372 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 373 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 374 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 375 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 376 return (EINVAL); 377 } 378 if (vap->va_flags != VNOVAL) { 379 if (vp->v_mount->mnt_flag & MNT_RDONLY) 380 return (EROFS); 381 if (cred->cr_uid != ip->i_ffs_uid && 382 (error = suser(cred, &p->p_acflag))) 383 return (error); 384 if (cred->cr_uid == 0) { 385 if ((ip->i_ffs_flags & (SF_IMMUTABLE | SF_APPEND)) && 386 securelevel > 0) 387 return (EPERM); 388 ip->i_ffs_flags = vap->va_flags; 389 } else { 390 if ((ip->i_ffs_flags & (SF_IMMUTABLE | SF_APPEND)) || 391 (vap->va_flags & UF_SETTABLE) != vap->va_flags) 392 return (EPERM); 393 if ((ip->i_ffs_flags & SF_SETTABLE) != 394 (vap->va_flags & SF_SETTABLE)) 395 return (EPERM); 396 ip->i_ffs_flags &= SF_SETTABLE; 397 ip->i_ffs_flags |= (vap->va_flags & UF_SETTABLE); 398 } 399 ip->i_flag |= IN_CHANGE; 400 if (vap->va_flags & (IMMUTABLE | APPEND)) 401 return (0); 402 } 403 if (ip->i_ffs_flags & (IMMUTABLE | APPEND)) 404 return (EPERM); 405 /* 406 * Go through the fields and update iff not VNOVAL. 407 */ 408 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 409 if (vp->v_mount->mnt_flag & MNT_RDONLY) 410 return (EROFS); 411 error = ufs_chown(vp, vap->va_uid, vap->va_gid, cred, p); 412 if (error) 413 return (error); 414 } 415 if (vap->va_size != VNOVAL) { 416 /* 417 * Disallow write attempts on read-only file systems; 418 * unless the file is a socket, fifo, or a block or 419 * character device resident on the file system. 420 */ 421 switch (vp->v_type) { 422 case VDIR: 423 return (EISDIR); 424 case VLNK: 425 case VREG: 426 if (vp->v_mount->mnt_flag & MNT_RDONLY) 427 return (EROFS); 428 break; 429 default: 430 break; 431 } 432 error = VOP_TRUNCATE(vp, vap->va_size, 0, cred, p); 433 if (error) 434 return (error); 435 } 436 ip = VTOI(vp); 437 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 438 if (vp->v_mount->mnt_flag & MNT_RDONLY) 439 return (EROFS); 440 if (cred->cr_uid != ip->i_ffs_uid && 441 (error = suser(cred, &p->p_acflag)) && 442 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 443 (error = VOP_ACCESS(vp, VWRITE, cred, p)))) 444 return (error); 445 if (vap->va_atime.tv_sec != VNOVAL) 446 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 447 ip->i_flag |= IN_ACCESS; 448 if (vap->va_mtime.tv_sec != VNOVAL) 449 ip->i_flag |= IN_CHANGE | IN_UPDATE; 450 error = VOP_UPDATE(vp, &vap->va_atime, &vap->va_mtime, 0); 451 if (error) 452 return (error); 453 } 454 error = 0; 455 if (vap->va_mode != (mode_t)VNOVAL) { 456 if (vp->v_mount->mnt_flag & MNT_RDONLY) 457 return (EROFS); 458 error = ufs_chmod(vp, (int)vap->va_mode, cred, p); 459 } 460 return (error); 461 } 462 463 /* 464 * Change the mode on a file. 465 * Inode must be locked before calling. 466 */ 467 static int 468 ufs_chmod(struct vnode *vp, int mode, struct ucred *cred, struct proc *p) 469 { 470 struct inode *ip; 471 int error; 472 473 ip = VTOI(vp); 474 if (cred->cr_uid != ip->i_ffs_uid && 475 (error = suser(cred, &p->p_acflag))) 476 return (error); 477 if (cred->cr_uid) { 478 if (vp->v_type != VDIR && (mode & S_ISTXT)) 479 return (EFTYPE); 480 if (!groupmember(ip->i_ffs_gid, cred) && (mode & ISGID)) 481 return (EPERM); 482 } 483 ip->i_ffs_mode &= ~ALLPERMS; 484 ip->i_ffs_mode |= (mode & ALLPERMS); 485 ip->i_flag |= IN_CHANGE; 486 return (0); 487 } 488 489 /* 490 * Perform chown operation on inode ip; 491 * inode must be locked prior to call. 492 */ 493 static int 494 ufs_chown(struct vnode *vp, uid_t uid, gid_t gid, struct ucred *cred, 495 struct proc *p) 496 { 497 struct inode *ip; 498 int error; 499 #ifdef QUOTA 500 uid_t ouid; 501 gid_t ogid; 502 int i; 503 long change; 504 #endif 505 ip = VTOI(vp); 506 error = 0; 507 508 if (uid == (uid_t)VNOVAL) 509 uid = ip->i_ffs_uid; 510 if (gid == (gid_t)VNOVAL) 511 gid = ip->i_ffs_gid; 512 /* 513 * If we don't own the file, are trying to change the owner 514 * of the file, or are not a member of the target group, 515 * the caller's credentials must imply super-user privilege 516 * or the call fails. 517 */ 518 if ((cred->cr_uid != ip->i_ffs_uid || uid != ip->i_ffs_uid || 519 (gid != ip->i_ffs_gid && !groupmember((gid_t)gid, cred))) && 520 ((error = suser(cred, &p->p_acflag)) != 0)) 521 return (error); 522 523 #ifdef QUOTA 524 ogid = ip->i_ffs_gid; 525 ouid = ip->i_ffs_uid; 526 if ((error = getinoquota(ip)) != 0) 527 return (error); 528 if (ouid == uid) { 529 dqrele(vp, ip->i_dquot[USRQUOTA]); 530 ip->i_dquot[USRQUOTA] = NODQUOT; 531 } 532 if (ogid == gid) { 533 dqrele(vp, ip->i_dquot[GRPQUOTA]); 534 ip->i_dquot[GRPQUOTA] = NODQUOT; 535 } 536 change = ip->i_ffs_blocks; 537 (void) chkdq(ip, -change, cred, CHOWN); 538 (void) chkiq(ip, -1, cred, CHOWN); 539 for (i = 0; i < MAXQUOTAS; i++) { 540 dqrele(vp, ip->i_dquot[i]); 541 ip->i_dquot[i] = NODQUOT; 542 } 543 #endif 544 ip->i_ffs_gid = gid; 545 ip->i_ffs_uid = uid; 546 #ifdef QUOTA 547 if ((error = getinoquota(ip)) == 0) { 548 if (ouid == uid) { 549 dqrele(vp, ip->i_dquot[USRQUOTA]); 550 ip->i_dquot[USRQUOTA] = NODQUOT; 551 } 552 if (ogid == gid) { 553 dqrele(vp, ip->i_dquot[GRPQUOTA]); 554 ip->i_dquot[GRPQUOTA] = NODQUOT; 555 } 556 if ((error = chkdq(ip, change, cred, CHOWN)) == 0) { 557 if ((error = chkiq(ip, 1, cred, CHOWN)) == 0) 558 goto good; 559 else 560 (void) chkdq(ip, -change, cred, CHOWN|FORCE); 561 } 562 for (i = 0; i < MAXQUOTAS; i++) { 563 dqrele(vp, ip->i_dquot[i]); 564 ip->i_dquot[i] = NODQUOT; 565 } 566 } 567 ip->i_ffs_gid = ogid; 568 ip->i_ffs_uid = ouid; 569 if (getinoquota(ip) == 0) { 570 if (ouid == uid) { 571 dqrele(vp, ip->i_dquot[USRQUOTA]); 572 ip->i_dquot[USRQUOTA] = NODQUOT; 573 } 574 if (ogid == gid) { 575 dqrele(vp, ip->i_dquot[GRPQUOTA]); 576 ip->i_dquot[GRPQUOTA] = NODQUOT; 577 } 578 (void) chkdq(ip, change, cred, FORCE|CHOWN); 579 (void) chkiq(ip, 1, cred, FORCE|CHOWN); 580 (void) getinoquota(ip); 581 } 582 return (error); 583 good: 584 if (getinoquota(ip)) 585 panic("chown: lost quota"); 586 #endif /* QUOTA */ 587 ip->i_flag |= IN_CHANGE; 588 return (0); 589 } 590 591 int 592 ufs_remove(void *v) 593 { 594 struct vop_remove_args /* { 595 struct vnode *a_dvp; 596 struct vnode *a_vp; 597 struct componentname *a_cnp; 598 } */ *ap = v; 599 struct vnode *vp, *dvp; 600 struct inode *ip; 601 int error; 602 603 vp = ap->a_vp; 604 dvp = ap->a_dvp; 605 ip = VTOI(vp); 606 if (vp->v_type == VDIR || (ip->i_ffs_flags & (IMMUTABLE | APPEND)) || 607 (VTOI(dvp)->i_ffs_flags & APPEND)) 608 error = EPERM; 609 else 610 error = ufs_dirremove(dvp, ip, ap->a_cnp->cn_flags, 0); 611 if (dvp == vp) 612 vrele(vp); 613 else 614 vput(vp); 615 vput(dvp); 616 return (error); 617 } 618 619 /* 620 * link vnode call 621 */ 622 int 623 ufs_link(void *v) 624 { 625 struct vop_link_args /* { 626 struct vnode *a_dvp; 627 struct vnode *a_vp; 628 struct componentname *a_cnp; 629 } */ *ap = v; 630 struct vnode *vp, *dvp; 631 struct componentname *cnp; 632 struct inode *ip; 633 struct direct newdir; 634 int error; 635 636 dvp = ap->a_dvp; 637 vp = ap->a_vp; 638 cnp = ap->a_cnp; 639 #ifdef DIAGNOSTIC 640 if ((cnp->cn_flags & HASBUF) == 0) 641 panic("ufs_link: no name"); 642 #endif 643 if (vp->v_type == VDIR) { 644 VOP_ABORTOP(dvp, cnp); 645 error = EPERM; 646 goto out2; 647 } 648 if (dvp->v_mount != vp->v_mount) { 649 VOP_ABORTOP(dvp, cnp); 650 error = EXDEV; 651 goto out2; 652 } 653 if (dvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE))) { 654 VOP_ABORTOP(dvp, cnp); 655 goto out2; 656 } 657 ip = VTOI(vp); 658 if ((nlink_t)ip->i_ffs_nlink >= LINK_MAX) { 659 VOP_ABORTOP(dvp, cnp); 660 error = EMLINK; 661 goto out1; 662 } 663 if (ip->i_ffs_flags & (IMMUTABLE | APPEND)) { 664 VOP_ABORTOP(dvp, cnp); 665 error = EPERM; 666 goto out1; 667 } 668 ip->i_ffs_effnlink++; 669 ip->i_ffs_nlink++; 670 ip->i_flag |= IN_CHANGE; 671 if (DOINGSOFTDEP(vp)) 672 softdep_change_linkcnt(ip); 673 error = VOP_UPDATE(vp, NULL, NULL, UPDATE_DIROP); 674 if (!error) { 675 ufs_makedirentry(ip, cnp, &newdir); 676 error = ufs_direnter(dvp, vp, &newdir, cnp, NULL); 677 } 678 if (error) { 679 ip->i_ffs_effnlink--; 680 ip->i_ffs_nlink--; 681 ip->i_flag |= IN_CHANGE; 682 if (DOINGSOFTDEP(vp)) 683 softdep_change_linkcnt(ip); 684 } 685 PNBUF_PUT(cnp->cn_pnbuf); 686 out1: 687 if (dvp != vp) 688 VOP_UNLOCK(vp, 0); 689 out2: 690 vput(dvp); 691 return (error); 692 } 693 694 /* 695 * whiteout vnode call 696 */ 697 int 698 ufs_whiteout(void *v) 699 { 700 struct vop_whiteout_args /* { 701 struct vnode *a_dvp; 702 struct componentname *a_cnp; 703 int a_flags; 704 } */ *ap = v; 705 struct vnode *dvp; 706 struct componentname *cnp; 707 struct direct newdir; 708 int error; 709 710 dvp = ap->a_dvp; 711 cnp = ap->a_cnp; 712 error = 0; 713 switch (ap->a_flags) { 714 case LOOKUP: 715 /* 4.4 format directories support whiteout operations */ 716 if (dvp->v_mount->mnt_maxsymlinklen > 0) 717 return (0); 718 return (EOPNOTSUPP); 719 720 case CREATE: 721 /* create a new directory whiteout */ 722 #ifdef DIAGNOSTIC 723 if ((cnp->cn_flags & SAVENAME) == 0) 724 panic("ufs_whiteout: missing name"); 725 if (dvp->v_mount->mnt_maxsymlinklen <= 0) 726 panic("ufs_whiteout: old format filesystem"); 727 #endif 728 729 newdir.d_ino = WINO; 730 newdir.d_namlen = cnp->cn_namelen; 731 memcpy(newdir.d_name, cnp->cn_nameptr, 732 (unsigned)cnp->cn_namelen + 1); 733 newdir.d_type = DT_WHT; 734 error = ufs_direnter(dvp, NULL, &newdir, cnp, NULL); 735 break; 736 737 case DELETE: 738 /* remove an existing directory whiteout */ 739 #ifdef DIAGNOSTIC 740 if (dvp->v_mount->mnt_maxsymlinklen <= 0) 741 panic("ufs_whiteout: old format filesystem"); 742 #endif 743 744 cnp->cn_flags &= ~DOWHITEOUT; 745 error = ufs_dirremove(dvp, NULL, cnp->cn_flags, 0); 746 break; 747 default: 748 panic("ufs_whiteout: unknown op"); 749 /* NOTREACHED */ 750 } 751 if (cnp->cn_flags & HASBUF) { 752 PNBUF_PUT(cnp->cn_pnbuf); 753 cnp->cn_flags &= ~HASBUF; 754 } 755 return (error); 756 } 757 758 759 /* 760 * Rename system call. 761 * rename("foo", "bar"); 762 * is essentially 763 * unlink("bar"); 764 * link("foo", "bar"); 765 * unlink("foo"); 766 * but ``atomically''. Can't do full commit without saving state in the 767 * inode on disk which isn't feasible at this time. Best we can do is 768 * always guarantee the target exists. 769 * 770 * Basic algorithm is: 771 * 772 * 1) Bump link count on source while we're linking it to the 773 * target. This also ensure the inode won't be deleted out 774 * from underneath us while we work (it may be truncated by 775 * a concurrent `trunc' or `open' for creation). 776 * 2) Link source to destination. If destination already exists, 777 * delete it first. 778 * 3) Unlink source reference to inode if still around. If a 779 * directory was moved and the parent of the destination 780 * is different from the source, patch the ".." entry in the 781 * directory. 782 */ 783 int 784 ufs_rename(void *v) 785 { 786 struct vop_rename_args /* { 787 struct vnode *a_fdvp; 788 struct vnode *a_fvp; 789 struct componentname *a_fcnp; 790 struct vnode *a_tdvp; 791 struct vnode *a_tvp; 792 struct componentname *a_tcnp; 793 } */ *ap = v; 794 struct vnode *tvp, *tdvp, *fvp, *fdvp; 795 struct componentname *tcnp, *fcnp; 796 struct inode *ip, *xp, *dp; 797 struct direct newdir; 798 int doingdirectory, oldparent, newparent, error; 799 800 tvp = ap->a_tvp; 801 tdvp = ap->a_tdvp; 802 fvp = ap->a_fvp; 803 fdvp = ap->a_fdvp; 804 tcnp = ap->a_tcnp; 805 fcnp = ap->a_fcnp; 806 doingdirectory = oldparent = newparent = error = 0; 807 808 #ifdef DIAGNOSTIC 809 if ((tcnp->cn_flags & HASBUF) == 0 || 810 (fcnp->cn_flags & HASBUF) == 0) 811 panic("ufs_rename: no name"); 812 #endif 813 /* 814 * Check for cross-device rename. 815 */ 816 if ((fvp->v_mount != tdvp->v_mount) || 817 (tvp && (fvp->v_mount != tvp->v_mount))) { 818 error = EXDEV; 819 abortit: 820 VOP_ABORTOP(tdvp, tcnp); /* XXX, why not in NFS? */ 821 if (tdvp == tvp) 822 vrele(tdvp); 823 else 824 vput(tdvp); 825 if (tvp) 826 vput(tvp); 827 VOP_ABORTOP(fdvp, fcnp); /* XXX, why not in NFS? */ 828 vrele(fdvp); 829 vrele(fvp); 830 return (error); 831 } 832 833 /* 834 * Check if just deleting a link name. 835 */ 836 if (tvp && ((VTOI(tvp)->i_ffs_flags & (IMMUTABLE | APPEND)) || 837 (VTOI(tdvp)->i_ffs_flags & APPEND))) { 838 error = EPERM; 839 goto abortit; 840 } 841 if (fvp == tvp) { 842 if (fvp->v_type == VDIR) { 843 error = EINVAL; 844 goto abortit; 845 } 846 847 /* Release destination completely. */ 848 VOP_ABORTOP(tdvp, tcnp); 849 vput(tdvp); 850 vput(tvp); 851 852 /* Delete source. */ 853 vrele(fvp); 854 fcnp->cn_flags &= ~(MODMASK | SAVESTART); 855 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 856 fcnp->cn_nameiop = DELETE; 857 if ((error = relookup(fdvp, &fvp, fcnp))){ 858 /* relookup blew away fdvp */ 859 return (error); 860 } 861 return (VOP_REMOVE(fdvp, fvp, fcnp)); 862 } 863 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 864 goto abortit; 865 dp = VTOI(fdvp); 866 ip = VTOI(fvp); 867 if ((nlink_t) ip->i_ffs_nlink >= LINK_MAX) { 868 VOP_UNLOCK(fvp, 0); 869 error = EMLINK; 870 goto abortit; 871 } 872 if ((ip->i_ffs_flags & (IMMUTABLE | APPEND)) || 873 (dp->i_ffs_flags & APPEND)) { 874 VOP_UNLOCK(fvp, 0); 875 error = EPERM; 876 goto abortit; 877 } 878 if ((ip->i_ffs_mode & IFMT) == IFDIR) { 879 /* 880 * Avoid ".", "..", and aliases of "." for obvious reasons. 881 */ 882 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 883 dp == ip || 884 (fcnp->cn_flags & ISDOTDOT) || 885 (tcnp->cn_flags & ISDOTDOT) || 886 (ip->i_flag & IN_RENAME)) { 887 VOP_UNLOCK(fvp, 0); 888 error = EINVAL; 889 goto abortit; 890 } 891 ip->i_flag |= IN_RENAME; 892 oldparent = dp->i_number; 893 doingdirectory = 1; 894 } 895 /* vrele(fdvp); */ 896 897 /* 898 * When the target exists, both the directory 899 * and target vnodes are returned locked. 900 */ 901 dp = VTOI(tdvp); 902 xp = NULL; 903 if (tvp) 904 xp = VTOI(tvp); 905 906 /* 907 * 1) Bump link count while we're moving stuff 908 * around. If we crash somewhere before 909 * completing our work, the link count 910 * may be wrong, but correctable. 911 */ 912 ip->i_ffs_effnlink++; 913 ip->i_ffs_nlink++; 914 ip->i_flag |= IN_CHANGE; 915 if (DOINGSOFTDEP(fvp)) 916 softdep_change_linkcnt(ip); 917 if ((error = VOP_UPDATE(fvp, NULL, NULL, UPDATE_DIROP)) != 0) { 918 VOP_UNLOCK(fvp, 0); 919 goto bad; 920 } 921 922 /* 923 * If ".." must be changed (ie the directory gets a new 924 * parent) then the source directory must not be in the 925 * directory hierarchy above the target, as this would 926 * orphan everything below the source directory. Also 927 * the user must have write permission in the source so 928 * as to be able to change "..". We must repeat the call 929 * to namei, as the parent directory is unlocked by the 930 * call to checkpath(). 931 */ 932 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 933 VOP_UNLOCK(fvp, 0); 934 if (oldparent != dp->i_number) 935 newparent = dp->i_number; 936 if (doingdirectory && newparent) { 937 if (error) /* write access check above */ 938 goto bad; 939 if (xp != NULL) 940 vput(tvp); 941 vref(tdvp); /* compensate for the ref checkpath looses */ 942 if ((error = ufs_checkpath(ip, dp, tcnp->cn_cred)) != 0) { 943 vrele(tdvp); 944 goto out; 945 } 946 tcnp->cn_flags &= ~SAVESTART; 947 if ((error = relookup(tdvp, &tvp, tcnp)) != 0) 948 goto out; 949 dp = VTOI(tdvp); 950 xp = NULL; 951 if (tvp) 952 xp = VTOI(tvp); 953 } 954 /* 955 * 2) If target doesn't exist, link the target 956 * to the source and unlink the source. 957 * Otherwise, rewrite the target directory 958 * entry to reference the source inode and 959 * expunge the original entry's existence. 960 */ 961 if (xp == NULL) { 962 if (dp->i_dev != ip->i_dev) 963 panic("rename: EXDEV"); 964 /* 965 * Account for ".." in new directory. 966 * When source and destination have the same 967 * parent we don't fool with the link count. 968 */ 969 if (doingdirectory && newparent) { 970 if ((nlink_t)dp->i_ffs_nlink >= LINK_MAX) { 971 error = EMLINK; 972 goto bad; 973 } 974 dp->i_ffs_effnlink++; 975 dp->i_ffs_nlink++; 976 dp->i_flag |= IN_CHANGE; 977 if (DOINGSOFTDEP(tdvp)) 978 softdep_change_linkcnt(dp); 979 if ((error = VOP_UPDATE(tdvp, NULL, NULL, 980 UPDATE_DIROP)) != 0) { 981 dp->i_ffs_effnlink--; 982 dp->i_ffs_nlink--; 983 dp->i_flag |= IN_CHANGE; 984 if (DOINGSOFTDEP(tdvp)) 985 softdep_change_linkcnt(dp); 986 goto bad; 987 } 988 } 989 ufs_makedirentry(ip, tcnp, &newdir); 990 error = ufs_direnter(tdvp, NULL, &newdir, tcnp, NULL); 991 if (error != 0) { 992 if (doingdirectory && newparent) { 993 dp->i_ffs_effnlink--; 994 dp->i_ffs_nlink--; 995 dp->i_flag |= IN_CHANGE; 996 if (DOINGSOFTDEP(tdvp)) 997 softdep_change_linkcnt(dp); 998 (void)VOP_UPDATE(tdvp, NULL, NULL, 999 UPDATE_WAIT|UPDATE_DIROP); 1000 } 1001 goto bad; 1002 } 1003 vput(tdvp); 1004 } else { 1005 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) 1006 panic("rename: EXDEV"); 1007 /* 1008 * Short circuit rename(foo, foo). 1009 */ 1010 if (xp->i_number == ip->i_number) 1011 panic("rename: same file"); 1012 /* 1013 * If the parent directory is "sticky", then the user must 1014 * own the parent directory, or the destination of the rename, 1015 * otherwise the destination may not be changed (except by 1016 * root). This implements append-only directories. 1017 */ 1018 if ((dp->i_ffs_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 && 1019 tcnp->cn_cred->cr_uid != dp->i_ffs_uid && 1020 xp->i_ffs_uid != tcnp->cn_cred->cr_uid) { 1021 error = EPERM; 1022 goto bad; 1023 } 1024 /* 1025 * Target must be empty if a directory and have no links 1026 * to it. Also, ensure source and target are compatible 1027 * (both directories, or both not directories). 1028 */ 1029 if ((xp->i_ffs_mode & IFMT) == IFDIR) { 1030 if (xp->i_ffs_effnlink > 2 || 1031 !ufs_dirempty(xp, dp->i_number, tcnp->cn_cred)) { 1032 error = ENOTEMPTY; 1033 goto bad; 1034 } 1035 if (!doingdirectory) { 1036 error = ENOTDIR; 1037 goto bad; 1038 } 1039 cache_purge(tdvp); 1040 } else if (doingdirectory) { 1041 error = EISDIR; 1042 goto bad; 1043 } 1044 if ((error = ufs_dirrewrite(dp, xp, ip->i_number, 1045 IFTODT(ip->i_ffs_mode), doingdirectory && newparent ? 1046 newparent : doingdirectory)) != 0) 1047 goto bad; 1048 if (doingdirectory) { 1049 if (!newparent) { 1050 dp->i_ffs_effnlink--; 1051 if (DOINGSOFTDEP(tdvp)) 1052 softdep_change_linkcnt(dp); 1053 } 1054 xp->i_ffs_effnlink--; 1055 if (DOINGSOFTDEP(tvp)) 1056 softdep_change_linkcnt(xp); 1057 } 1058 if (doingdirectory && !DOINGSOFTDEP(tvp)) { 1059 /* 1060 * Truncate inode. The only stuff left in the directory 1061 * is "." and "..". The "." reference is inconsequential 1062 * since we are quashing it. We have removed the "." 1063 * reference and the reference in the parent directory, 1064 * but there may be other hard links. The soft 1065 * dependency code will arrange to do these operations 1066 * after the parent directory entry has been deleted on 1067 * disk, so when running with that code we avoid doing 1068 * them now. 1069 */ 1070 if (!newparent) { 1071 dp->i_ffs_nlink--; 1072 dp->i_flag |= IN_CHANGE; 1073 } 1074 xp->i_ffs_nlink--; 1075 xp->i_flag |= IN_CHANGE; 1076 if ((error = VOP_TRUNCATE(tvp, (off_t)0, IO_SYNC, 1077 tcnp->cn_cred, tcnp->cn_proc))) 1078 goto bad; 1079 } 1080 vput(tdvp); 1081 vput(tvp); 1082 xp = NULL; 1083 } 1084 1085 /* 1086 * 3) Unlink the source. 1087 */ 1088 fcnp->cn_flags &= ~(MODMASK | SAVESTART); 1089 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1090 if ((error = relookup(fdvp, &fvp, fcnp))) { 1091 vrele(ap->a_fvp); 1092 return (error); 1093 } 1094 if (fvp != NULL) { 1095 xp = VTOI(fvp); 1096 dp = VTOI(fdvp); 1097 } else { 1098 /* 1099 * From name has disappeared. 1100 */ 1101 if (doingdirectory) 1102 panic("rename: lost dir entry"); 1103 vrele(ap->a_fvp); 1104 return (0); 1105 } 1106 /* 1107 * Ensure that the directory entry still exists and has not 1108 * changed while the new name has been entered. If the source is 1109 * a file then the entry may have been unlinked or renamed. In 1110 * either case there is no further work to be done. If the source 1111 * is a directory then it cannot have been rmdir'ed; The IRENAME 1112 * flag ensures that it cannot be moved by another rename or removed 1113 * by a rmdir. 1114 */ 1115 if (xp != ip) { 1116 if (doingdirectory) 1117 panic("rename: lost dir entry"); 1118 } else { 1119 /* 1120 * If the source is a directory with a 1121 * new parent, the link count of the old 1122 * parent directory must be decremented 1123 * and ".." set to point to the new parent. 1124 */ 1125 if (doingdirectory && newparent) { 1126 xp->i_offset = mastertemplate.dot_reclen; 1127 ufs_dirrewrite(xp, dp, newparent, DT_DIR, 0); 1128 cache_purge(fdvp); 1129 } 1130 error = ufs_dirremove(fdvp, xp, fcnp->cn_flags, 0); 1131 xp->i_flag &= ~IN_RENAME; 1132 } 1133 if (dp) 1134 vput(fdvp); 1135 if (xp) 1136 vput(fvp); 1137 vrele(ap->a_fvp); 1138 return (error); 1139 1140 /* exit routines from steps 1 & 2 */ 1141 bad: 1142 if (xp) 1143 vput(ITOV(xp)); 1144 vput(ITOV(dp)); 1145 out: 1146 if (doingdirectory) 1147 ip->i_flag &= ~IN_RENAME; 1148 if (vn_lock(fvp, LK_EXCLUSIVE) == 0) { 1149 ip->i_ffs_effnlink--; 1150 ip->i_ffs_nlink--; 1151 ip->i_flag |= IN_CHANGE; 1152 if (DOINGSOFTDEP(fvp)) 1153 softdep_change_linkcnt(ip); 1154 vput(fvp); 1155 } else 1156 vrele(fvp); 1157 vrele(fdvp); 1158 return (error); 1159 } 1160 1161 /* 1162 * Mkdir system call 1163 */ 1164 int 1165 ufs_mkdir(void *v) 1166 { 1167 struct vop_mkdir_args /* { 1168 struct vnode *a_dvp; 1169 struct vnode **a_vpp; 1170 struct componentname *a_cnp; 1171 struct vattr *a_vap; 1172 } */ *ap = v; 1173 struct vnode *dvp, *tvp; 1174 struct vattr *vap; 1175 struct componentname *cnp; 1176 struct inode *ip, *dp; 1177 struct buf *bp; 1178 struct dirtemplate dirtemplate; 1179 struct direct newdir; 1180 int error, dmode, blkoff; 1181 1182 dvp = ap->a_dvp; 1183 vap = ap->a_vap; 1184 cnp = ap->a_cnp; 1185 #ifdef DIAGNOSTIC 1186 if ((cnp->cn_flags & HASBUF) == 0) 1187 panic("ufs_mkdir: no name"); 1188 #endif 1189 dp = VTOI(dvp); 1190 if ((nlink_t)dp->i_ffs_nlink >= LINK_MAX) { 1191 error = EMLINK; 1192 goto out; 1193 } 1194 dmode = vap->va_mode & ACCESSPERMS; 1195 dmode |= IFDIR; 1196 /* 1197 * Must simulate part of ufs_makeinode here to acquire the inode, 1198 * but not have it entered in the parent directory. The entry is 1199 * made later after writing "." and ".." entries. 1200 */ 1201 if ((error = VOP_VALLOC(dvp, dmode, cnp->cn_cred, &tvp)) != 0) 1202 goto out; 1203 ip = VTOI(tvp); 1204 ip->i_ffs_uid = cnp->cn_cred->cr_uid; 1205 ip->i_ffs_gid = dp->i_ffs_gid; 1206 #ifdef QUOTA 1207 if ((error = getinoquota(ip)) || 1208 (error = chkiq(ip, 1, cnp->cn_cred, 0))) { 1209 PNBUF_PUT(cnp->cn_pnbuf); 1210 VOP_VFREE(tvp, ip->i_number, dmode); 1211 vput(tvp); 1212 vput(dvp); 1213 return (error); 1214 } 1215 #endif 1216 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1217 ip->i_ffs_mode = dmode; 1218 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ 1219 ip->i_ffs_effnlink = 2; 1220 ip->i_ffs_nlink = 2; 1221 if (DOINGSOFTDEP(tvp)) 1222 softdep_change_linkcnt(ip); 1223 if (cnp->cn_flags & ISWHITEOUT) 1224 ip->i_ffs_flags |= UF_OPAQUE; 1225 1226 /* 1227 * Bump link count in parent directory to reflect work done below. 1228 * Should be done before reference is created so cleanup is 1229 * possible if we crash. 1230 */ 1231 dp->i_ffs_effnlink++; 1232 dp->i_ffs_nlink++; 1233 dp->i_flag |= IN_CHANGE; 1234 if (DOINGSOFTDEP(dvp)) 1235 softdep_change_linkcnt(dp); 1236 if ((error = VOP_UPDATE(dvp, NULL, NULL, UPDATE_DIROP)) != 0) 1237 goto bad; 1238 1239 /* 1240 * Initialize directory with "." and ".." from static template. 1241 */ 1242 dirtemplate = mastertemplate; 1243 dirtemplate.dot_ino = ufs_rw32(ip->i_number, 1244 UFS_MPNEEDSWAP(dvp->v_mount)); 1245 dirtemplate.dotdot_ino = ufs_rw32(dp->i_number, 1246 UFS_MPNEEDSWAP(dvp->v_mount)); 1247 dirtemplate.dot_reclen = ufs_rw16(dirtemplate.dot_reclen, 1248 UFS_MPNEEDSWAP(dvp->v_mount)); 1249 dirtemplate.dotdot_reclen = ufs_rw16(dirtemplate.dotdot_reclen, 1250 UFS_MPNEEDSWAP(dvp->v_mount)); 1251 if (dvp->v_mount->mnt_maxsymlinklen <= 0) { 1252 #if BYTE_ORDER == LITTLE_ENDIAN 1253 if (UFS_MPNEEDSWAP(dvp->v_mount) == 0) 1254 #else 1255 if (UFS_MPNEEDSWAP(dvp->v_mount) != 0) 1256 #endif 1257 { 1258 dirtemplate.dot_type = dirtemplate.dot_namlen; 1259 dirtemplate.dotdot_type = dirtemplate.dotdot_namlen; 1260 dirtemplate.dot_namlen = dirtemplate.dotdot_namlen = 0; 1261 } else 1262 dirtemplate.dot_type = dirtemplate.dotdot_type = 0; 1263 } 1264 if ((error = VOP_BALLOC(tvp, (off_t)0, DIRBLKSIZ, cnp->cn_cred, 1265 B_CLRBUF, &bp)) != 0) 1266 goto bad; 1267 ip->i_ffs_size = DIRBLKSIZ; 1268 ip->i_flag |= IN_CHANGE | IN_UPDATE; 1269 uvm_vnp_setsize(tvp, ip->i_ffs_size); 1270 memcpy((caddr_t)bp->b_data, (caddr_t)&dirtemplate, sizeof dirtemplate); 1271 if (DOINGSOFTDEP(tvp)) { 1272 /* 1273 * Ensure that the entire newly allocated block is a 1274 * valid directory so that future growth within the 1275 * block does not have to ensure that the block is 1276 * written before the inode. 1277 */ 1278 blkoff = DIRBLKSIZ; 1279 while (blkoff < bp->b_bcount) { 1280 ((struct direct *) 1281 (bp->b_data + blkoff))->d_reclen = DIRBLKSIZ; 1282 blkoff += DIRBLKSIZ; 1283 } 1284 } 1285 /* 1286 * Directory set up, now install it's entry in the parent directory. 1287 * 1288 * If we are not doing soft dependencies, then we must write out the 1289 * buffer containing the new directory body before entering the new 1290 * name in the parent. If we are doing soft dependencies, then the 1291 * buffer containing the new directory body will be passed to and 1292 * released in the soft dependency code after the code has attached 1293 * an appropriate ordering dependency to the buffer which ensures that 1294 * the buffer is written before the new name is written in the parent. 1295 */ 1296 if (!DOINGSOFTDEP(tvp) && ((error = VOP_BWRITE(bp)) != 0)) 1297 goto bad; 1298 if ((error = VOP_UPDATE(tvp, NULL, NULL, UPDATE_DIROP)) != 0) { 1299 if (DOINGSOFTDEP(tvp)) 1300 (void)VOP_BWRITE(bp); 1301 goto bad; 1302 } 1303 ufs_makedirentry(ip, cnp, &newdir); 1304 error = ufs_direnter(dvp, tvp, &newdir, cnp, bp); 1305 bad: 1306 if (error == 0) { 1307 *ap->a_vpp = tvp; 1308 } else { 1309 dp->i_ffs_effnlink--; 1310 dp->i_ffs_nlink--; 1311 dp->i_flag |= IN_CHANGE; 1312 if (DOINGSOFTDEP(dvp)) 1313 softdep_change_linkcnt(dp); 1314 /* 1315 * No need to do an explicit VOP_TRUNCATE here, vrele will 1316 * do this for us because we set the link count to 0. 1317 */ 1318 ip->i_ffs_effnlink = 0; 1319 ip->i_ffs_nlink = 0; 1320 ip->i_flag |= IN_CHANGE; 1321 #ifdef LFS 1322 /* If IN_ADIROP, account for it */ 1323 lfs_unmark_vnode(tvp); 1324 #endif 1325 if (DOINGSOFTDEP(tvp)) 1326 softdep_change_linkcnt(ip); 1327 vput(tvp); 1328 } 1329 out: 1330 PNBUF_PUT(cnp->cn_pnbuf); 1331 vput(dvp); 1332 return (error); 1333 } 1334 1335 /* 1336 * Rmdir system call. 1337 */ 1338 int 1339 ufs_rmdir(void *v) 1340 { 1341 struct vop_rmdir_args /* { 1342 struct vnode *a_dvp; 1343 struct vnode *a_vp; 1344 struct componentname *a_cnp; 1345 } */ *ap = v; 1346 struct vnode *vp, *dvp; 1347 struct componentname *cnp; 1348 struct inode *ip, *dp; 1349 int error; 1350 1351 vp = ap->a_vp; 1352 dvp = ap->a_dvp; 1353 cnp = ap->a_cnp; 1354 ip = VTOI(vp); 1355 dp = VTOI(dvp); 1356 /* 1357 * No rmdir "." or of mounted directories please. 1358 */ 1359 if (dp == ip || vp->v_mountedhere != NULL) { 1360 vrele(dvp); 1361 if (vp->v_mountedhere != NULL) 1362 VOP_UNLOCK(dvp, 0); 1363 vput(vp); 1364 return (EINVAL); 1365 } 1366 /* 1367 * Do not remove a directory that is in the process of being renamed. 1368 * Verify that the directory is empty (and valid). (Rmdir ".." won't 1369 * be valid since ".." will contain a reference to the current 1370 * directory and thus be non-empty.) 1371 */ 1372 error = 0; 1373 if (ip->i_flag & IN_RENAME) { 1374 error = EINVAL; 1375 goto out; 1376 } 1377 if (ip->i_ffs_effnlink != 2 || 1378 !ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) { 1379 error = ENOTEMPTY; 1380 goto out; 1381 } 1382 if ((dp->i_ffs_flags & APPEND) || 1383 (ip->i_ffs_flags & (IMMUTABLE | APPEND))) { 1384 error = EPERM; 1385 goto out; 1386 } 1387 /* 1388 * Delete reference to directory before purging 1389 * inode. If we crash in between, the directory 1390 * will be reattached to lost+found, 1391 */ 1392 dp->i_ffs_effnlink--; 1393 ip->i_ffs_effnlink--; 1394 if (DOINGSOFTDEP(vp)) { 1395 softdep_change_linkcnt(dp); 1396 softdep_change_linkcnt(ip); 1397 } 1398 error = ufs_dirremove(dvp, ip, cnp->cn_flags, 1); 1399 if (error) { 1400 dp->i_ffs_effnlink++; 1401 ip->i_ffs_effnlink++; 1402 if (DOINGSOFTDEP(vp)) { 1403 softdep_change_linkcnt(dp); 1404 softdep_change_linkcnt(ip); 1405 } 1406 goto out; 1407 } 1408 cache_purge(dvp); 1409 /* 1410 * Truncate inode. The only stuff left in the directory is "." and 1411 * "..". The "." reference is inconsequential since we're quashing 1412 * it. The soft dependency code will arrange to do these operations 1413 * after the parent directory entry has been deleted on disk, so 1414 * when running with that code we avoid doing them now. 1415 */ 1416 if (!DOINGSOFTDEP(vp)) { 1417 dp->i_ffs_nlink--; 1418 dp->i_flag |= IN_CHANGE; 1419 ip->i_ffs_nlink--; 1420 ip->i_flag |= IN_CHANGE; 1421 error = VOP_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred, 1422 cnp->cn_proc); 1423 } 1424 cache_purge(vp); 1425 out: 1426 vput(dvp); 1427 vput(vp); 1428 return (error); 1429 } 1430 1431 /* 1432 * symlink -- make a symbolic link 1433 */ 1434 int 1435 ufs_symlink(void *v) 1436 { 1437 struct vop_symlink_args /* { 1438 struct vnode *a_dvp; 1439 struct vnode **a_vpp; 1440 struct componentname *a_cnp; 1441 struct vattr *a_vap; 1442 char *a_target; 1443 } */ *ap = v; 1444 struct vnode *vp, **vpp; 1445 struct inode *ip; 1446 int len, error; 1447 1448 vpp = ap->a_vpp; 1449 error = ufs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, 1450 vpp, ap->a_cnp); 1451 if (error) 1452 return (error); 1453 vp = *vpp; 1454 len = strlen(ap->a_target); 1455 if (len < vp->v_mount->mnt_maxsymlinklen) { 1456 ip = VTOI(vp); 1457 memcpy((char *)ip->i_ffs_shortlink, ap->a_target, len); 1458 ip->i_ffs_size = len; 1459 uvm_vnp_setsize(vp, ip->i_ffs_size); 1460 ip->i_flag |= IN_CHANGE | IN_UPDATE; 1461 } else 1462 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, 1463 UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, NULL, 1464 (struct proc *)0); 1465 if (error) 1466 vput(vp); 1467 return (error); 1468 } 1469 1470 /* 1471 * Vnode op for reading directories. 1472 * 1473 * The routine below assumes that the on-disk format of a directory 1474 * is the same as that defined by <sys/dirent.h>. If the on-disk 1475 * format changes, then it will be necessary to do a conversion 1476 * from the on-disk format that read returns to the format defined 1477 * by <sys/dirent.h>. 1478 */ 1479 int 1480 ufs_readdir(void *v) 1481 { 1482 struct vop_readdir_args /* { 1483 struct vnode *a_vp; 1484 struct uio *a_uio; 1485 struct ucred *a_cred; 1486 int *a_eofflag; 1487 off_t **a_cookies; 1488 int *ncookies; 1489 } */ *ap = v; 1490 struct uio *uio; 1491 int error; 1492 size_t count, lost; 1493 off_t off; 1494 1495 uio = ap->a_uio; 1496 off = uio->uio_offset; 1497 count = uio->uio_resid; 1498 /* Make sure we don't return partial entries. */ 1499 count -= (uio->uio_offset + count) & (DIRBLKSIZ -1); 1500 if (count <= 0) 1501 return (EINVAL); 1502 lost = uio->uio_resid - count; 1503 uio->uio_resid = count; 1504 uio->uio_iov->iov_len = count; 1505 #if BYTE_ORDER == LITTLE_ENDIAN 1506 if (ap->a_vp->v_mount->mnt_maxsymlinklen > 0 && 1507 UFS_MPNEEDSWAP(ap->a_vp->v_mount) == 0) 1508 #else 1509 if (UFS_MPNEEDSWAP(ap->a_vp->v_mount) == 0) 1510 #endif 1511 { 1512 error = VOP_READ(ap->a_vp, uio, 0, ap->a_cred); 1513 } else { 1514 struct dirent *dp, *edp; 1515 struct uio auio; 1516 struct iovec aiov; 1517 caddr_t dirbuf; 1518 int readcnt; 1519 u_char tmp; 1520 1521 auio = *uio; 1522 auio.uio_iov = &aiov; 1523 auio.uio_iovcnt = 1; 1524 auio.uio_segflg = UIO_SYSSPACE; 1525 aiov.iov_len = count; 1526 MALLOC(dirbuf, caddr_t, count, M_TEMP, M_WAITOK); 1527 aiov.iov_base = dirbuf; 1528 error = VOP_READ(ap->a_vp, &auio, 0, ap->a_cred); 1529 if (error == 0) { 1530 readcnt = count - auio.uio_resid; 1531 edp = (struct dirent *)&dirbuf[readcnt]; 1532 for (dp = (struct dirent *)dirbuf; dp < edp; ) { 1533 #if BYTE_ORDER == LITTLE_ENDIAN 1534 if (ap->a_vp->v_mount->mnt_maxsymlinklen <= 0 && 1535 UFS_MPNEEDSWAP(ap->a_vp->v_mount) == 0) 1536 #else 1537 if (ap->a_vp->v_mount->mnt_maxsymlinklen <= 0 && 1538 UFS_MPNEEDSWAP(ap->a_vp->v_mount) != 0) 1539 #endif 1540 { 1541 tmp = dp->d_namlen; 1542 dp->d_namlen = dp->d_type; 1543 dp->d_type = tmp; 1544 } 1545 dp->d_fileno = ufs_rw32(dp->d_fileno, 1546 UFS_MPNEEDSWAP(ap->a_vp->v_mount)); 1547 dp->d_reclen = ufs_rw16(dp->d_reclen, 1548 UFS_MPNEEDSWAP(ap->a_vp->v_mount)); 1549 if (dp->d_reclen > 0) { 1550 dp = (struct dirent *) 1551 ((char *)dp + dp->d_reclen); 1552 } else { 1553 error = EIO; 1554 break; 1555 } 1556 } 1557 if (dp >= edp) 1558 error = uiomove(dirbuf, readcnt, uio); 1559 } 1560 FREE(dirbuf, M_TEMP); 1561 } 1562 if (!error && ap->a_ncookies) { 1563 struct dirent *dp, *dpstart; 1564 off_t *cookies, offstart; 1565 int ncookies; 1566 1567 /* 1568 * Only the NFS server and emulations use cookies, and they 1569 * load the directory block into system space, so we can 1570 * just look at it directly. 1571 */ 1572 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1573 panic("ufs_readdir: lost in space"); 1574 dpstart = (struct dirent *) 1575 ((caddr_t)uio->uio_iov->iov_base - (uio->uio_offset - off)); 1576 offstart = off; 1577 for (dp = dpstart, ncookies = 0; off < uio->uio_offset; ) { 1578 if (dp->d_reclen == 0) 1579 break; 1580 off += dp->d_reclen; 1581 ncookies++; 1582 dp = (struct dirent *)((caddr_t)dp + dp->d_reclen); 1583 } 1584 lost += uio->uio_offset - off; 1585 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 1586 uio->uio_offset = off; 1587 *ap->a_ncookies = ncookies; 1588 *ap->a_cookies = cookies; 1589 for (off = offstart, dp = dpstart; off < uio->uio_offset; ) { 1590 off += dp->d_reclen; 1591 *(cookies++) = off; 1592 dp = (struct dirent *)((caddr_t)dp + dp->d_reclen); 1593 } 1594 } 1595 uio->uio_resid += lost; 1596 *ap->a_eofflag = VTOI(ap->a_vp)->i_ffs_size <= uio->uio_offset; 1597 return (error); 1598 } 1599 1600 /* 1601 * Return target name of a symbolic link 1602 */ 1603 int 1604 ufs_readlink(void *v) 1605 { 1606 struct vop_readlink_args /* { 1607 struct vnode *a_vp; 1608 struct uio *a_uio; 1609 struct ucred *a_cred; 1610 } */ *ap = v; 1611 struct vnode *vp; 1612 struct inode *ip; 1613 int isize; 1614 1615 vp = ap->a_vp; 1616 ip = VTOI(vp); 1617 isize = ip->i_ffs_size; 1618 if (isize < vp->v_mount->mnt_maxsymlinklen || 1619 (vp->v_mount->mnt_maxsymlinklen == 0 && ip->i_ffs_blocks == 0)) { 1620 uiomove((char *)ip->i_ffs_shortlink, isize, ap->a_uio); 1621 return (0); 1622 } 1623 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); 1624 } 1625 1626 /* 1627 * Calculate the logical to physical mapping if not done already, 1628 * then call the device strategy routine. 1629 */ 1630 int 1631 ufs_strategy(void *v) 1632 { 1633 struct vop_strategy_args /* { 1634 struct buf *a_bp; 1635 } */ *ap = v; 1636 struct buf *bp; 1637 struct vnode *vp; 1638 struct inode *ip; 1639 int error; 1640 1641 bp = ap->a_bp; 1642 vp = bp->b_vp; 1643 ip = VTOI(vp); 1644 if (vp->v_type == VBLK || vp->v_type == VCHR) 1645 panic("ufs_strategy: spec"); 1646 KASSERT(bp->b_bcount != 0); 1647 if (bp->b_blkno == bp->b_lblkno) { 1648 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, 1649 NULL); 1650 if (error) { 1651 bp->b_error = error; 1652 bp->b_flags |= B_ERROR; 1653 biodone(bp); 1654 return (error); 1655 } 1656 if ((long)bp->b_blkno == -1) /* no valid data */ 1657 clrbuf(bp); 1658 } 1659 if ((long)bp->b_blkno < 0) { /* block is not on disk */ 1660 biodone(bp); 1661 return (0); 1662 } 1663 vp = ip->i_devvp; 1664 bp->b_dev = vp->v_rdev; 1665 VOCALL (vp->v_op, VOFFSET(vop_strategy), ap); 1666 return (0); 1667 } 1668 1669 /* 1670 * Print out the contents of an inode. 1671 */ 1672 int 1673 ufs_print(void *v) 1674 { 1675 struct vop_print_args /* { 1676 struct vnode *a_vp; 1677 } */ *ap = v; 1678 struct vnode *vp; 1679 struct inode *ip; 1680 1681 vp = ap->a_vp; 1682 ip = VTOI(vp); 1683 printf("tag VT_UFS, ino %d, on dev %d, %d", ip->i_number, 1684 major(ip->i_dev), minor(ip->i_dev)); 1685 printf(" flags 0x%x, effnlink %d, nlink %d\n", 1686 ip->i_flag, ip->i_ffs_effnlink, ip->i_ffs_nlink); 1687 printf("\tmode 0%o, owner %d, group %d, size %qd", 1688 ip->i_ffs_mode, ip->i_ffs_uid, ip->i_ffs_gid, 1689 (long long)ip->i_ffs_size); 1690 if (vp->v_type == VFIFO) 1691 fifo_printinfo(vp); 1692 lockmgr_printinfo(&vp->v_lock); 1693 printf("\n"); 1694 return (0); 1695 } 1696 1697 /* 1698 * Read wrapper for special devices. 1699 */ 1700 int 1701 ufsspec_read(void *v) 1702 { 1703 struct vop_read_args /* { 1704 struct vnode *a_vp; 1705 struct uio *a_uio; 1706 int a_ioflag; 1707 struct ucred *a_cred; 1708 } */ *ap = v; 1709 1710 /* 1711 * Set access flag. 1712 */ 1713 if ((ap->a_vp->v_mount->mnt_flag & MNT_NODEVMTIME) == 0) 1714 VTOI(ap->a_vp)->i_flag |= IN_ACCESS; 1715 return (VOCALL (spec_vnodeop_p, VOFFSET(vop_read), ap)); 1716 } 1717 1718 /* 1719 * Write wrapper for special devices. 1720 */ 1721 int 1722 ufsspec_write(void *v) 1723 { 1724 struct vop_write_args /* { 1725 struct vnode *a_vp; 1726 struct uio *a_uio; 1727 int a_ioflag; 1728 struct ucred *a_cred; 1729 } */ *ap = v; 1730 1731 /* 1732 * Set update and change flags. 1733 */ 1734 if ((ap->a_vp->v_mount->mnt_flag & MNT_NODEVMTIME) == 0) 1735 VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE; 1736 return (VOCALL (spec_vnodeop_p, VOFFSET(vop_write), ap)); 1737 } 1738 1739 /* 1740 * Close wrapper for special devices. 1741 * 1742 * Update the times on the inode then do device close. 1743 */ 1744 int 1745 ufsspec_close(void *v) 1746 { 1747 struct vop_close_args /* { 1748 struct vnode *a_vp; 1749 int a_fflag; 1750 struct ucred *a_cred; 1751 struct proc *a_p; 1752 } */ *ap = v; 1753 struct vnode *vp; 1754 struct inode *ip; 1755 struct timespec ts; 1756 1757 vp = ap->a_vp; 1758 ip = VTOI(vp); 1759 simple_lock(&vp->v_interlock); 1760 if (vp->v_usecount > 1) { 1761 TIMEVAL_TO_TIMESPEC(&time, &ts); 1762 ITIMES(ip, &ts, &ts, &ts); 1763 } 1764 simple_unlock(&vp->v_interlock); 1765 return (VOCALL (spec_vnodeop_p, VOFFSET(vop_close), ap)); 1766 } 1767 1768 /* 1769 * Read wrapper for fifo's 1770 */ 1771 int 1772 ufsfifo_read(void *v) 1773 { 1774 struct vop_read_args /* { 1775 struct vnode *a_vp; 1776 struct uio *a_uio; 1777 int a_ioflag; 1778 struct ucred *a_cred; 1779 } */ *ap = v; 1780 1781 /* 1782 * Set access flag. 1783 */ 1784 VTOI(ap->a_vp)->i_flag |= IN_ACCESS; 1785 return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_read), ap)); 1786 } 1787 1788 /* 1789 * Write wrapper for fifo's. 1790 */ 1791 int 1792 ufsfifo_write(void *v) 1793 { 1794 struct vop_write_args /* { 1795 struct vnode *a_vp; 1796 struct uio *a_uio; 1797 int a_ioflag; 1798 struct ucred *a_cred; 1799 } */ *ap = v; 1800 1801 /* 1802 * Set update and change flags. 1803 */ 1804 VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE; 1805 return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_write), ap)); 1806 } 1807 1808 /* 1809 * Close wrapper for fifo's. 1810 * 1811 * Update the times on the inode then do device close. 1812 */ 1813 int 1814 ufsfifo_close(void *v) 1815 { 1816 struct vop_close_args /* { 1817 struct vnode *a_vp; 1818 int a_fflag; 1819 struct ucred *a_cred; 1820 struct proc *a_p; 1821 } */ *ap = v; 1822 struct vnode *vp; 1823 struct inode *ip; 1824 struct timespec ts; 1825 1826 vp = ap->a_vp; 1827 ip = VTOI(vp); 1828 simple_lock(&vp->v_interlock); 1829 if (ap->a_vp->v_usecount > 1) { 1830 TIMEVAL_TO_TIMESPEC(&time, &ts); 1831 ITIMES(ip, &ts, &ts, &ts); 1832 } 1833 simple_unlock(&vp->v_interlock); 1834 return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_close), ap)); 1835 } 1836 1837 /* 1838 * Return POSIX pathconf information applicable to ufs filesystems. 1839 */ 1840 int 1841 ufs_pathconf(void *v) 1842 { 1843 struct vop_pathconf_args /* { 1844 struct vnode *a_vp; 1845 int a_name; 1846 register_t *a_retval; 1847 } */ *ap = v; 1848 1849 switch (ap->a_name) { 1850 case _PC_LINK_MAX: 1851 *ap->a_retval = LINK_MAX; 1852 return (0); 1853 case _PC_NAME_MAX: 1854 *ap->a_retval = NAME_MAX; 1855 return (0); 1856 case _PC_PATH_MAX: 1857 *ap->a_retval = PATH_MAX; 1858 return (0); 1859 case _PC_PIPE_BUF: 1860 *ap->a_retval = PIPE_BUF; 1861 return (0); 1862 case _PC_CHOWN_RESTRICTED: 1863 *ap->a_retval = 1; 1864 return (0); 1865 case _PC_NO_TRUNC: 1866 *ap->a_retval = 1; 1867 return (0); 1868 case _PC_SYNC_IO: 1869 *ap->a_retval = 1; 1870 return (0); 1871 case _PC_FILESIZEBITS: 1872 *ap->a_retval = 42; 1873 return (0); 1874 default: 1875 return (EINVAL); 1876 } 1877 /* NOTREACHED */ 1878 } 1879 1880 /* 1881 * Advisory record locking support 1882 */ 1883 int 1884 ufs_advlock(void *v) 1885 { 1886 struct vop_advlock_args /* { 1887 struct vnode *a_vp; 1888 caddr_t a_id; 1889 int a_op; 1890 struct flock *a_fl; 1891 int a_flags; 1892 } */ *ap = v; 1893 struct inode *ip; 1894 1895 ip = VTOI(ap->a_vp); 1896 return lf_advlock(ap, &ip->i_lockf, ip->i_ffs_size); 1897 } 1898 1899 /* 1900 * Initialize the vnode associated with a new inode, handle aliased 1901 * vnodes. 1902 */ 1903 void 1904 ufs_vinit(struct mount *mntp, int (**specops)(void *), int (**fifoops)(void *), 1905 struct vnode **vpp) 1906 { 1907 struct inode *ip; 1908 struct vnode *vp, *nvp; 1909 1910 vp = *vpp; 1911 ip = VTOI(vp); 1912 switch(vp->v_type = IFTOVT(ip->i_ffs_mode)) { 1913 case VCHR: 1914 case VBLK: 1915 vp->v_op = specops; 1916 if ((nvp = checkalias(vp, 1917 ufs_rw32(ip->i_ffs_rdev, UFS_MPNEEDSWAP(vp->v_mount)), 1918 mntp)) != NULL) { 1919 /* 1920 * Discard unneeded vnode, but save its inode. 1921 */ 1922 nvp->v_data = vp->v_data; 1923 vp->v_data = NULL; 1924 /* XXX spec_vnodeops has no locking, do it explicitly */ 1925 VOP_UNLOCK(vp, 0); 1926 vp->v_op = spec_vnodeop_p; 1927 vrele(vp); 1928 vgone(vp); 1929 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 1930 /* 1931 * Reinitialize aliased inode. 1932 */ 1933 vp = nvp; 1934 ip->i_vnode = vp; 1935 } 1936 break; 1937 case VFIFO: 1938 vp->v_op = fifoops; 1939 break; 1940 case VNON: 1941 case VBAD: 1942 case VSOCK: 1943 case VLNK: 1944 case VDIR: 1945 case VREG: 1946 break; 1947 } 1948 if (ip->i_number == ROOTINO) 1949 vp->v_flag |= VROOT; 1950 /* 1951 * Initialize modrev times 1952 */ 1953 SETHIGH(ip->i_modrev, mono_time.tv_sec); 1954 SETLOW(ip->i_modrev, mono_time.tv_usec * 4294); 1955 *vpp = vp; 1956 } 1957 1958 /* 1959 * Allocate a new inode. 1960 */ 1961 int 1962 ufs_makeinode(int mode, struct vnode *dvp, struct vnode **vpp, 1963 struct componentname *cnp) 1964 { 1965 struct inode *ip, *pdir; 1966 struct direct newdir; 1967 struct vnode *tvp; 1968 int error; 1969 1970 pdir = VTOI(dvp); 1971 #ifdef DIAGNOSTIC 1972 if ((cnp->cn_flags & HASBUF) == 0) 1973 panic("ufs_makeinode: no name"); 1974 #endif 1975 *vpp = NULL; 1976 if ((mode & IFMT) == 0) 1977 mode |= IFREG; 1978 1979 if ((error = VOP_VALLOC(dvp, mode, cnp->cn_cred, &tvp)) != 0) { 1980 PNBUF_PUT(cnp->cn_pnbuf); 1981 vput(dvp); 1982 return (error); 1983 } 1984 ip = VTOI(tvp); 1985 ip->i_ffs_gid = pdir->i_ffs_gid; 1986 ip->i_ffs_uid = cnp->cn_cred->cr_uid; 1987 #ifdef QUOTA 1988 if ((error = getinoquota(ip)) || 1989 (error = chkiq(ip, 1, cnp->cn_cred, 0))) { 1990 PNBUF_PUT(cnp->cn_pnbuf); 1991 VOP_VFREE(tvp, ip->i_number, mode); 1992 vput(tvp); 1993 vput(dvp); 1994 return (error); 1995 } 1996 #endif 1997 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1998 ip->i_ffs_mode = mode; 1999 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ 2000 ip->i_ffs_effnlink = 1; 2001 ip->i_ffs_nlink = 1; 2002 if (DOINGSOFTDEP(tvp)) 2003 softdep_change_linkcnt(ip); 2004 if ((ip->i_ffs_mode & ISGID) && 2005 !groupmember(ip->i_ffs_gid, cnp->cn_cred) && 2006 suser(cnp->cn_cred, NULL)) 2007 ip->i_ffs_mode &= ~ISGID; 2008 2009 if (cnp->cn_flags & ISWHITEOUT) 2010 ip->i_ffs_flags |= UF_OPAQUE; 2011 2012 /* 2013 * Make sure inode goes to disk before directory entry. 2014 */ 2015 if ((error = VOP_UPDATE(tvp, NULL, NULL, UPDATE_DIROP)) != 0) 2016 goto bad; 2017 ufs_makedirentry(ip, cnp, &newdir); 2018 if ((error = ufs_direnter(dvp, tvp, &newdir, cnp, NULL)) != 0) 2019 goto bad; 2020 if ((cnp->cn_flags & SAVESTART) == 0) 2021 PNBUF_PUT(cnp->cn_pnbuf); 2022 vput(dvp); 2023 *vpp = tvp; 2024 return (0); 2025 2026 bad: 2027 /* 2028 * Write error occurred trying to update the inode 2029 * or the directory so must deallocate the inode. 2030 */ 2031 PNBUF_PUT(cnp->cn_pnbuf); 2032 vput(dvp); 2033 ip->i_ffs_effnlink = 0; 2034 ip->i_ffs_nlink = 0; 2035 ip->i_flag |= IN_CHANGE; 2036 #ifdef LFS 2037 /* If IN_ADIROP, account for it */ 2038 lfs_unmark_vnode(tvp); 2039 #endif 2040 if (DOINGSOFTDEP(tvp)) 2041 softdep_change_linkcnt(ip); 2042 tvp->v_type = VNON; 2043 vput(tvp); 2044 return (error); 2045 } 2046