ext2fs_vnops.c revision 1.1
1 /* $NetBSD: ext2fs_vnops.c,v 1.1 1997/06/11 09:34:09 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Manuel Bouyer. 5 * Copyright (c) 1982, 1986, 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * (c) UNIX System Laboratories, Inc. 8 * All or some portions of this file are derived from material licensed 9 * to the University of California by American Telephone and Telegraph 10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 * the permission of UNIX System Laboratories, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)ufs_vnops.c 8.14 (Berkeley) 10/26/94 42 * Modified for ext2fs by Manuel Bouyer. 43 */ 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/resourcevar.h> 48 #include <sys/kernel.h> 49 #include <sys/file.h> 50 #include <sys/stat.h> 51 #include <sys/buf.h> 52 #include <sys/proc.h> 53 #include <sys/conf.h> 54 #include <sys/mount.h> 55 #include <sys/namei.h> 56 #include <sys/vnode.h> 57 #include <sys/lockf.h> 58 #include <sys/malloc.h> 59 #include <sys/signalvar.h> 60 61 #include <vm/vm.h> 62 63 #include <miscfs/fifofs/fifo.h> 64 #include <miscfs/genfs/genfs.h> 65 #include <miscfs/specfs/specdev.h> 66 67 #include <ufs/ufs/quota.h> 68 #include <ufs/ufs/inode.h> 69 #include <ufs/ufs/ufs_extern.h> 70 #include <ufs/ufs/ufsmount.h> 71 72 #include <ufs/ext2fs/ext2fs.h> 73 #include <ufs/ext2fs/ext2fs_extern.h> 74 #include <ufs/ext2fs/ext2fs_dir.h> 75 76 77 static int ext2fs_chmod 78 __P((struct vnode *, int, struct ucred *, struct proc *)); 79 static int ext2fs_chown 80 __P((struct vnode *, uid_t, gid_t, struct ucred *, struct proc *)); 81 82 union _qcvt { 83 int64_t qcvt; 84 int32_t val[2]; 85 }; 86 #define SETHIGH(q, h) { \ 87 union _qcvt tmp; \ 88 tmp.qcvt = (q); \ 89 tmp.val[_QUAD_HIGHWORD] = (h); \ 90 (q) = tmp.qcvt; \ 91 } 92 #define SETLOW(q, l) { \ 93 union _qcvt tmp; \ 94 tmp.qcvt = (q); \ 95 tmp.val[_QUAD_LOWWORD] = (l); \ 96 (q) = tmp.qcvt; \ 97 } 98 99 /* 100 * Create a regular file 101 */ 102 int 103 ext2fs_create(v) 104 void *v; 105 { 106 struct vop_create_args /* { 107 struct vnode *a_dvp; 108 struct vnode **a_vpp; 109 struct componentname *a_cnp; 110 struct vattr *a_vap; 111 } */ *ap = v; 112 return 113 ext2fs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode), 114 ap->a_dvp, ap->a_vpp, ap->a_cnp); 115 } 116 117 /* 118 * Mknod vnode call 119 */ 120 /* ARGSUSED */ 121 int 122 ext2fs_mknod(v) 123 void *v; 124 { 125 struct vop_mknod_args /* { 126 struct vnode *a_dvp; 127 struct vnode **a_vpp; 128 struct componentname *a_cnp; 129 struct vattr *a_vap; 130 } */ *ap = v; 131 register struct vattr *vap = ap->a_vap; 132 register struct vnode **vpp = ap->a_vpp; 133 register struct inode *ip; 134 int error; 135 136 if ((error = 137 ext2fs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), 138 ap->a_dvp, vpp, ap->a_cnp)) != 0) 139 return (error); 140 ip = VTOI(*vpp); 141 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 142 if (vap->va_rdev != VNOVAL) { 143 /* 144 * Want to be able to use this to make badblock 145 * inodes, so don't truncate the dev number. 146 */ 147 ip->i_din.e2fs_din.e2di_rdev = vap->va_rdev; 148 } 149 /* 150 * Remove inode so that it will be reloaded by VFS_VGET and 151 * checked to see if it is an alias of an existing entry in 152 * the inode cache. 153 */ 154 vput(*vpp); 155 (*vpp)->v_type = VNON; 156 vgone(*vpp); 157 *vpp = 0; 158 return (0); 159 } 160 161 /* 162 * Open called. 163 * 164 * Just check the APPEND flag. 165 */ 166 /* ARGSUSED */ 167 int 168 ext2fs_open(v) 169 void *v; 170 { 171 struct vop_open_args /* { 172 struct vnode *a_vp; 173 int a_mode; 174 struct ucred *a_cred; 175 struct proc *a_p; 176 } */ *ap = v; 177 178 /* 179 * Files marked append-only must be opened for appending. 180 */ 181 if ((VTOI(ap->a_vp)->i_e2fs_flags & EXT2_APPEND) && 182 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 183 return (EPERM); 184 return (0); 185 } 186 187 int 188 ext2fs_access(v) 189 void *v; 190 { 191 struct vop_access_args /* { 192 struct vnode *a_vp; 193 int a_mode; 194 struct ucred *a_cred; 195 struct proc *a_p; 196 } */ *ap = v; 197 register struct vnode *vp = ap->a_vp; 198 register struct inode *ip = VTOI(vp); 199 mode_t mode = ap->a_mode; 200 201 #ifdef DIAGNOSTIC 202 if (!VOP_ISLOCKED(vp)) { 203 vprint("ext2fs_access: not locked", vp); 204 panic("ext2fs_access: not locked"); 205 } 206 #endif 207 208 /* If immutable bit set, nobody gets to write it. */ 209 if ((mode & VWRITE) && (ip->i_e2fs_flags & EXT2_IMMUTABLE)) 210 return (EPERM); 211 212 return (vaccess(vp->v_type, ip->i_e2fs_mode & ALLPERMS, 213 ip->i_e2fs_uid, ip->i_e2fs_gid, mode, ap->a_cred)); 214 } 215 216 /* ARGSUSED */ 217 int 218 ext2fs_getattr(v) 219 void *v; 220 { 221 struct vop_getattr_args /* { 222 struct vnode *a_vp; 223 struct vattr *a_vap; 224 struct ucred *a_cred; 225 struct proc *a_p; 226 } */ *ap = v; 227 register struct vnode *vp = ap->a_vp; 228 register struct inode *ip = VTOI(vp); 229 register struct vattr *vap = ap->a_vap; 230 struct timespec ts; 231 232 TIMEVAL_TO_TIMESPEC(&time, &ts); 233 EXT2FS_ITIMES(ip, &ts, &ts, &ts); 234 /* 235 * Copy from inode table 236 */ 237 vap->va_fsid = ip->i_dev; 238 vap->va_fileid = ip->i_number; 239 vap->va_mode = ip->i_e2fs_mode & ALLPERMS; 240 vap->va_nlink = ip->i_e2fs_nlink; 241 vap->va_uid = ip->i_e2fs_uid; 242 vap->va_gid = ip->i_e2fs_gid; 243 vap->va_rdev = (dev_t)ip->i_din.e2fs_din.e2di_rdev; 244 vap->va_size = ip->i_e2fs_size; 245 vap->va_atime.tv_sec = ip->i_e2fs_atime; 246 vap->va_atime.tv_nsec = 0; 247 vap->va_mtime.tv_sec = ip->i_e2fs_mtime; 248 vap->va_mtime.tv_nsec = 0; 249 vap->va_ctime.tv_sec = ip->i_e2fs_ctime; 250 vap->va_ctime.tv_nsec = 0; 251 #ifdef EXT2FS_SYSTEM_FLAGS 252 vap->va_flags = (ip->i_e2fs_flags & EXT2_APPEND) ? SF_APPEND : 0; 253 vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0; 254 #else 255 vap->va_flags = (ip->i_e2fs_flags & EXT2_APPEND) ? UF_APPEND : 0; 256 vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? UF_IMMUTABLE : 0; 257 #endif 258 vap->va_gen = ip->i_e2fs_gen; 259 /* this doesn't belong here */ 260 if (vp->v_type == VBLK) 261 vap->va_blocksize = BLKDEV_IOSIZE; 262 else if (vp->v_type == VCHR) 263 vap->va_blocksize = MAXBSIZE; 264 else 265 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; 266 vap->va_bytes = dbtob(ip->i_e2fs_nblock); 267 vap->va_type = vp->v_type; 268 vap->va_filerev = ip->i_modrev; 269 return (0); 270 } 271 272 /* 273 * Set attribute vnode op. called from several syscalls 274 */ 275 int 276 ext2fs_setattr(v) 277 void *v; 278 { 279 struct vop_setattr_args /* { 280 struct vnode *a_vp; 281 struct vattr *a_vap; 282 struct ucred *a_cred; 283 struct proc *a_p; 284 } */ *ap = v; 285 register struct vattr *vap = ap->a_vap; 286 register struct vnode *vp = ap->a_vp; 287 register struct inode *ip = VTOI(vp); 288 register struct ucred *cred = ap->a_cred; 289 register struct proc *p = ap->a_p; 290 int error; 291 292 /* 293 * Check for unsettable attributes. 294 */ 295 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 296 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 297 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 298 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 299 return (EINVAL); 300 } 301 if (vap->va_flags != VNOVAL) { 302 if (cred->cr_uid != ip->i_e2fs_uid && 303 (error = suser(cred, &p->p_acflag))) 304 return (error); 305 #ifdef EXT2FS_SYSTEM_FLAGS 306 if (cred->cr_uid == 0) { 307 if ((ip->i_e2fs_flags & (EXT2_APPEND | EXT2_IMMUTABLE)) && 308 securelevel > 0) 309 return (EPERM); 310 ip->i_e2fs_flags &= ~(EXT2_APPEND | EXT2_IMMUTABLE); 311 ip->i_e2fs_flags |= (vap->va_flags & SF_APPEND) ? EXT2_APPEND : 0 | 312 (vap->va_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE: 0; 313 } else { 314 return (EPERM); 315 } 316 #else 317 ip->i_e2fs_flags &= ~(EXT2_APPEND | EXT2_IMMUTABLE); 318 ip->i_e2fs_flags |= (vap->va_flags & UF_APPEND) ? EXT2_APPEND : 0 | 319 (vap->va_flags & UF_IMMUTABLE) ? EXT2_IMMUTABLE: 0; 320 #endif 321 ip->i_flag |= IN_CHANGE; 322 if (vap->va_flags & (IMMUTABLE | APPEND)) 323 return (0); 324 } 325 if (ip->i_e2fs_flags & (EXT2_APPEND | EXT2_IMMUTABLE)) 326 return (EPERM); 327 /* 328 * Go through the fields and update iff not VNOVAL. 329 */ 330 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 331 error = ext2fs_chown(vp, vap->va_uid, vap->va_gid, cred, p); 332 if (error) 333 return (error); 334 } 335 if (vap->va_size != VNOVAL) { 336 if (vp->v_type == VDIR) 337 return (EISDIR); 338 error = VOP_TRUNCATE(vp, vap->va_size, 0, cred, p); 339 if (error) 340 return (error); 341 } 342 ip = VTOI(vp); 343 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 344 if (cred->cr_uid != ip->i_e2fs_uid && 345 (error = suser(cred, &p->p_acflag)) && 346 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 347 (error = VOP_ACCESS(vp, VWRITE, cred, p)))) 348 return (error); 349 if (vap->va_atime.tv_sec != VNOVAL) 350 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 351 ip->i_flag |= IN_ACCESS; 352 if (vap->va_mtime.tv_sec != VNOVAL) 353 ip->i_flag |= IN_CHANGE | IN_UPDATE; 354 error = VOP_UPDATE(vp, &vap->va_atime, &vap->va_mtime, 1); 355 if (error) 356 return (error); 357 } 358 error = 0; 359 if (vap->va_mode != (mode_t)VNOVAL) 360 error = ext2fs_chmod(vp, (int)vap->va_mode, cred, p); 361 return (error); 362 } 363 364 /* 365 * Change the mode on a file. 366 * Inode must be locked before calling. 367 */ 368 static int 369 ext2fs_chmod(vp, mode, cred, p) 370 register struct vnode *vp; 371 register int mode; 372 register struct ucred *cred; 373 struct proc *p; 374 { 375 register struct inode *ip = VTOI(vp); 376 int error; 377 378 if (cred->cr_uid != ip->i_e2fs_uid && 379 (error = suser(cred, &p->p_acflag))) 380 return (error); 381 if (cred->cr_uid) { 382 if (vp->v_type != VDIR && (mode & S_ISTXT)) 383 return (EFTYPE); 384 if (!groupmember(ip->i_e2fs_gid, cred) && (mode & ISGID)) 385 return (EPERM); 386 } 387 ip->i_e2fs_mode &= ~ALLPERMS; 388 ip->i_e2fs_mode |= (mode & ALLPERMS); 389 ip->i_flag |= IN_CHANGE; 390 if ((vp->v_flag & VTEXT) && (ip->i_e2fs_mode & S_ISTXT) == 0) 391 (void) vnode_pager_uncache(vp); 392 return (0); 393 } 394 395 /* 396 * Perform chown operation on inode ip; 397 * inode must be locked prior to call. 398 */ 399 static int 400 ext2fs_chown(vp, uid, gid, cred, p) 401 register struct vnode *vp; 402 uid_t uid; 403 gid_t gid; 404 struct ucred *cred; 405 struct proc *p; 406 { 407 register struct inode *ip = VTOI(vp); 408 uid_t ouid; 409 gid_t ogid; 410 int error = 0; 411 412 if (uid == (uid_t)VNOVAL) 413 uid = ip->i_e2fs_uid; 414 if (gid == (gid_t)VNOVAL) 415 gid = ip->i_e2fs_gid; 416 /* 417 * If we don't own the file, are trying to change the owner 418 * of the file, or are not a member of the target group, 419 * the caller must be superuser or the call fails. 420 */ 421 if ((cred->cr_uid != ip->i_e2fs_uid || uid != ip->i_e2fs_uid || 422 (gid != ip->i_e2fs_gid && !groupmember((gid_t)gid, cred))) && 423 (error = suser(cred, &p->p_acflag))) 424 return (error); 425 ogid = ip->i_e2fs_gid; 426 ouid = ip->i_e2fs_uid; 427 428 ip->i_e2fs_gid = gid; 429 ip->i_e2fs_uid = uid; 430 if (ouid != uid || ogid != gid) 431 ip->i_flag |= IN_CHANGE; 432 if (ouid != uid && cred->cr_uid != 0) 433 ip->i_e2fs_mode &= ~ISUID; 434 if (ogid != gid && cred->cr_uid != 0) 435 ip->i_e2fs_mode &= ~ISGID; 436 return (0); 437 } 438 439 int 440 ext2fs_remove(v) 441 void *v; 442 { 443 struct vop_remove_args /* { 444 struct vnode *a_dvp; 445 struct vnode *a_vp; 446 struct componentname *a_cnp; 447 } */ *ap = v; 448 register struct inode *ip; 449 register struct vnode *vp = ap->a_vp; 450 register struct vnode *dvp = ap->a_dvp; 451 int error; 452 453 if (vp->v_type == VDIR) { 454 error = EISDIR; 455 goto out; 456 } 457 ip = VTOI(vp); 458 if ((ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 459 (VTOI(dvp)->i_e2fs_flags & EXT2_APPEND)) { 460 error = EPERM; 461 goto out; 462 } 463 error = ext2fs_dirremove(dvp, ap->a_cnp); 464 if (error == 0) { 465 ip->i_e2fs_nlink--; 466 ip->i_flag |= IN_CHANGE; 467 } 468 out: 469 if (dvp == vp) 470 vrele(vp); 471 else 472 vput(vp); 473 vput(dvp); 474 return (error); 475 } 476 477 /* 478 * link vnode call 479 */ 480 int 481 ext2fs_link(v) 482 void *v; 483 { 484 struct vop_link_args /* { 485 struct vnode *a_dvp; 486 struct vnode *a_vp; 487 struct componentname *a_cnp; 488 } */ *ap = v; 489 register struct vnode *dvp = ap->a_dvp; 490 register struct vnode *vp = ap->a_vp; 491 register struct componentname *cnp = ap->a_cnp; 492 register struct inode *ip; 493 struct timespec ts; 494 int error; 495 496 #ifdef DIAGNOSTIC 497 if ((cnp->cn_flags & HASBUF) == 0) 498 panic("ext2fs_link: no name"); 499 #endif 500 if (vp->v_type == VDIR) { 501 VOP_ABORTOP(dvp, cnp); 502 error = EISDIR; 503 goto out2; 504 } 505 if (dvp->v_mount != vp->v_mount) { 506 VOP_ABORTOP(dvp, cnp); 507 error = EXDEV; 508 goto out2; 509 } 510 if (dvp != vp && (error = VOP_LOCK(vp))) { 511 VOP_ABORTOP(dvp, cnp); 512 goto out2; 513 } 514 ip = VTOI(vp); 515 if ((nlink_t)ip->i_e2fs_nlink >= LINK_MAX) { 516 VOP_ABORTOP(dvp, cnp); 517 error = EMLINK; 518 goto out1; 519 } 520 if (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) { 521 VOP_ABORTOP(dvp, cnp); 522 error = EPERM; 523 goto out1; 524 } 525 ip->i_e2fs_nlink++; 526 ip->i_flag |= IN_CHANGE; 527 TIMEVAL_TO_TIMESPEC(&time, &ts); 528 error = VOP_UPDATE(vp, &ts, &ts, 1); 529 if (!error) 530 error = ext2fs_direnter(ip, dvp, cnp); 531 if (error) { 532 ip->i_e2fs_nlink--; 533 ip->i_flag |= IN_CHANGE; 534 } 535 FREE(cnp->cn_pnbuf, M_NAMEI); 536 out1: 537 if (dvp != vp) 538 VOP_UNLOCK(vp); 539 out2: 540 vput(dvp); 541 return (error); 542 } 543 544 /* 545 * Rename system call. 546 * rename("foo", "bar"); 547 * is essentially 548 * unlink("bar"); 549 * link("foo", "bar"); 550 * unlink("foo"); 551 * but ``atomically''. Can't do full commit without saving state in the 552 * inode on disk which isn't feasible at this time. Best we can do is 553 * always guarantee the target exists. 554 * 555 * Basic algorithm is: 556 * 557 * 1) Bump link count on source while we're linking it to the 558 * target. This also ensure the inode won't be deleted out 559 * from underneath us while we work (it may be truncated by 560 * a concurrent `trunc' or `open' for creation). 561 * 2) Link source to destination. If destination already exists, 562 * delete it first. 563 * 3) Unlink source reference to inode if still around. If a 564 * directory was moved and the parent of the destination 565 * is different from the source, patch the ".." entry in the 566 * directory. 567 */ 568 int 569 ext2fs_rename(v) 570 void *v; 571 { 572 struct vop_rename_args /* { 573 struct vnode *a_fdvp; 574 struct vnode *a_fvp; 575 struct componentname *a_fcnp; 576 struct vnode *a_tdvp; 577 struct vnode *a_tvp; 578 struct componentname *a_tcnp; 579 } */ *ap = v; 580 struct vnode *tvp = ap->a_tvp; 581 register struct vnode *tdvp = ap->a_tdvp; 582 struct vnode *fvp = ap->a_fvp; 583 register struct vnode *fdvp = ap->a_fdvp; 584 register struct componentname *tcnp = ap->a_tcnp; 585 register struct componentname *fcnp = ap->a_fcnp; 586 register struct inode *ip, *xp, *dp; 587 struct ext2fs_dirtemplate dirbuf; 588 struct timespec ts; 589 int doingdirectory = 0, oldparent = 0, newparent = 0; 590 int error = 0; 591 u_char namlen; 592 593 #ifdef DIAGNOSTIC 594 if ((tcnp->cn_flags & HASBUF) == 0 || 595 (fcnp->cn_flags & HASBUF) == 0) 596 panic("ext2fs_rename: no name"); 597 #endif 598 /* 599 * Check for cross-device rename. 600 */ 601 if ((fvp->v_mount != tdvp->v_mount) || 602 (tvp && (fvp->v_mount != tvp->v_mount))) { 603 error = EXDEV; 604 abortit: 605 VOP_ABORTOP(tdvp, tcnp); /* XXX, why not in NFS? */ 606 if (tdvp == tvp) 607 vrele(tdvp); 608 else 609 vput(tdvp); 610 if (tvp) 611 vput(tvp); 612 VOP_ABORTOP(fdvp, fcnp); /* XXX, why not in NFS? */ 613 vrele(fdvp); 614 vrele(fvp); 615 return (error); 616 } 617 618 /* 619 * Check if just deleting a link name. 620 */ 621 if (tvp && ((VTOI(tvp)->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 622 (VTOI(tdvp)->i_e2fs_flags & EXT2_APPEND))) { 623 error = EPERM; 624 goto abortit; 625 } 626 if (fvp == tvp) { 627 if (fvp->v_type == VDIR) { 628 error = EINVAL; 629 goto abortit; 630 } 631 632 /* Release destination completely. */ 633 VOP_ABORTOP(tdvp, tcnp); 634 vput(tdvp); 635 vput(tvp); 636 637 /* Delete source. */ 638 vrele(fdvp); 639 vrele(fvp); 640 fcnp->cn_flags &= ~MODMASK; 641 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 642 if ((fcnp->cn_flags & SAVESTART) == 0) 643 panic("ext2fs_rename: lost from startdir"); 644 fcnp->cn_nameiop = DELETE; 645 (void) relookup(fdvp, &fvp, fcnp); 646 return (VOP_REMOVE(fdvp, fvp, fcnp)); 647 } 648 if ((error = VOP_LOCK(fvp)) != 0) 649 goto abortit; 650 dp = VTOI(fdvp); 651 ip = VTOI(fvp); 652 if ((ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 653 (dp->i_e2fs_flags & EXT2_APPEND)) { 654 VOP_UNLOCK(fvp); 655 error = EPERM; 656 goto abortit; 657 } 658 if ((ip->i_e2fs_mode & IFMT) == IFDIR) { 659 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 660 if (!error && tvp) 661 error = VOP_ACCESS(tvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 662 if (error) { 663 VOP_UNLOCK(fvp); 664 error = EACCES; 665 goto abortit; 666 } 667 /* 668 * Avoid ".", "..", and aliases of "." for obvious reasons. 669 */ 670 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 671 dp == ip || (fcnp->cn_flags&ISDOTDOT) || 672 (ip->i_flag & IN_RENAME)) { 673 VOP_UNLOCK(fvp); 674 error = EINVAL; 675 goto abortit; 676 } 677 ip->i_flag |= IN_RENAME; 678 oldparent = dp->i_number; 679 doingdirectory++; 680 } 681 vrele(fdvp); 682 683 /* 684 * When the target exists, both the directory 685 * and target vnodes are returned locked. 686 */ 687 dp = VTOI(tdvp); 688 xp = NULL; 689 if (tvp) 690 xp = VTOI(tvp); 691 692 /* 693 * 1) Bump link count while we're moving stuff 694 * around. If we crash somewhere before 695 * completing our work, the link count 696 * may be wrong, but correctable. 697 */ 698 ip->i_e2fs_nlink++; 699 ip->i_flag |= IN_CHANGE; 700 TIMEVAL_TO_TIMESPEC(&time, &ts); 701 if ((error = VOP_UPDATE(fvp, &ts, &ts, 1)) != 0) { 702 VOP_UNLOCK(fvp); 703 goto bad; 704 } 705 706 /* 707 * If ".." must be changed (ie the directory gets a new 708 * parent) then the source directory must not be in the 709 * directory heirarchy above the target, as this would 710 * orphan everything below the source directory. Also 711 * the user must have write permission in the source so 712 * as to be able to change "..". We must repeat the call 713 * to namei, as the parent directory is unlocked by the 714 * call to checkpath(). 715 */ 716 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 717 VOP_UNLOCK(fvp); 718 if (oldparent != dp->i_number) 719 newparent = dp->i_number; 720 if (doingdirectory && newparent) { 721 if (error) /* write access check above */ 722 goto bad; 723 if (xp != NULL) 724 vput(tvp); 725 error = ext2fs_checkpath(ip, dp, tcnp->cn_cred); 726 if (error != 0) 727 goto out; 728 if ((tcnp->cn_flags & SAVESTART) == 0) 729 panic("ext2fs_rename: lost to startdir"); 730 if ((error = relookup(tdvp, &tvp, tcnp)) != 0) 731 goto out; 732 dp = VTOI(tdvp); 733 xp = NULL; 734 if (tvp) 735 xp = VTOI(tvp); 736 } 737 /* 738 * 2) If target doesn't exist, link the target 739 * to the source and unlink the source. 740 * Otherwise, rewrite the target directory 741 * entry to reference the source inode and 742 * expunge the original entry's existence. 743 */ 744 if (xp == NULL) { 745 if (dp->i_dev != ip->i_dev) 746 panic("rename: EXDEV"); 747 /* 748 * Account for ".." in new directory. 749 * When source and destination have the same 750 * parent we don't fool with the link count. 751 */ 752 if (doingdirectory && newparent) { 753 if ((nlink_t)dp->i_e2fs_nlink >= LINK_MAX) { 754 error = EMLINK; 755 goto bad; 756 } 757 dp->i_e2fs_nlink++; 758 dp->i_flag |= IN_CHANGE; 759 if ((error = VOP_UPDATE(tdvp, &ts, &ts, 1)) != 0) 760 goto bad; 761 } 762 error = ext2fs_direnter(ip, tdvp, tcnp); 763 if (error != 0) { 764 if (doingdirectory && newparent) { 765 dp->i_e2fs_nlink--; 766 dp->i_flag |= IN_CHANGE; 767 (void)VOP_UPDATE(tdvp, &ts, &ts, 1); 768 } 769 goto bad; 770 } 771 vput(tdvp); 772 } else { 773 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) 774 panic("rename: EXDEV"); 775 /* 776 * Short circuit rename(foo, foo). 777 */ 778 if (xp->i_number == ip->i_number) 779 panic("rename: same file"); 780 /* 781 * If the parent directory is "sticky", then the user must 782 * own the parent directory, or the destination of the rename, 783 * otherwise the destination may not be changed (except by 784 * root). This implements append-only directories. 785 */ 786 if ((dp->i_e2fs_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 && 787 tcnp->cn_cred->cr_uid != dp->i_e2fs_uid && 788 xp->i_e2fs_uid != tcnp->cn_cred->cr_uid) { 789 error = EPERM; 790 goto bad; 791 } 792 /* 793 * Target must be empty if a directory and have no links 794 * to it. Also, ensure source and target are compatible 795 * (both directories, or both not directories). 796 */ 797 if ((xp->i_e2fs_mode & IFMT) == IFDIR) { 798 if (!ext2fs_dirempty(xp, dp->i_number, tcnp->cn_cred) || 799 xp->i_e2fs_nlink > 2) { 800 error = ENOTEMPTY; 801 goto bad; 802 } 803 if (!doingdirectory) { 804 error = ENOTDIR; 805 goto bad; 806 } 807 cache_purge(tdvp); 808 } else if (doingdirectory) { 809 error = EISDIR; 810 goto bad; 811 } 812 error = ext2fs_dirrewrite(dp, ip, tcnp); 813 if (error != 0) 814 goto bad; 815 /* 816 * If the target directory is in the same 817 * directory as the source directory, 818 * decrement the link count on the parent 819 * of the target directory. 820 */ 821 if (doingdirectory && !newparent) { 822 dp->i_e2fs_nlink--; 823 dp->i_flag |= IN_CHANGE; 824 } 825 vput(tdvp); 826 /* 827 * Adjust the link count of the target to 828 * reflect the dirrewrite above. If this is 829 * a directory it is empty and there are 830 * no links to it, so we can squash the inode and 831 * any space associated with it. We disallowed 832 * renaming over top of a directory with links to 833 * it above, as the remaining link would point to 834 * a directory without "." or ".." entries. 835 */ 836 xp->i_e2fs_nlink--; 837 if (doingdirectory) { 838 if (--xp->i_e2fs_nlink != 0) 839 panic("rename: linked directory"); 840 error = VOP_TRUNCATE(tvp, (off_t)0, IO_SYNC, 841 tcnp->cn_cred, tcnp->cn_proc); 842 } 843 xp->i_flag |= IN_CHANGE; 844 vput(tvp); 845 xp = NULL; 846 } 847 848 /* 849 * 3) Unlink the source. 850 */ 851 fcnp->cn_flags &= ~MODMASK; 852 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 853 if ((fcnp->cn_flags & SAVESTART) == 0) 854 panic("ext2fs_rename: lost from startdir"); 855 (void) relookup(fdvp, &fvp, fcnp); 856 if (fvp != NULL) { 857 xp = VTOI(fvp); 858 dp = VTOI(fdvp); 859 } else { 860 /* 861 * From name has disappeared. 862 */ 863 if (doingdirectory) 864 panic("ext2fs_rename: lost dir entry"); 865 vrele(ap->a_fvp); 866 return (0); 867 } 868 /* 869 * Ensure that the directory entry still exists and has not 870 * changed while the new name has been entered. If the source is 871 * a file then the entry may have been unlinked or renamed. In 872 * either case there is no further work to be done. If the source 873 * is a directory then it cannot have been rmdir'ed; its link 874 * count of three would cause a rmdir to fail with ENOTEMPTY. 875 * The IRENAME flag ensures that it cannot be moved by another 876 * rename. 877 */ 878 if (xp != ip) { 879 if (doingdirectory) 880 panic("ext2fs_rename: lost dir entry"); 881 } else { 882 /* 883 * If the source is a directory with a 884 * new parent, the link count of the old 885 * parent directory must be decremented 886 * and ".." set to point to the new parent. 887 */ 888 if (doingdirectory && newparent) { 889 dp->i_e2fs_nlink--; 890 dp->i_flag |= IN_CHANGE; 891 error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf, 892 sizeof (struct ext2fs_dirtemplate), (off_t)0, 893 UIO_SYSSPACE, IO_NODELOCKED, 894 tcnp->cn_cred, (int *)0, (struct proc *)0); 895 if (error == 0) { 896 namlen = dirbuf.dotdot_namlen; 897 if (namlen != 2 || 898 dirbuf.dotdot_name[0] != '.' || 899 dirbuf.dotdot_name[1] != '.') { 900 ufs_dirbad(xp, (doff_t)12, 901 "ext2fs_rename: mangled dir"); 902 } else { 903 dirbuf.dotdot_ino = newparent; 904 (void) vn_rdwr(UIO_WRITE, fvp, 905 (caddr_t)&dirbuf, 906 sizeof (struct dirtemplate), 907 (off_t)0, UIO_SYSSPACE, 908 IO_NODELOCKED|IO_SYNC, 909 tcnp->cn_cred, (int *)0, 910 (struct proc *)0); 911 cache_purge(fdvp); 912 } 913 } 914 } 915 error = ext2fs_dirremove(fdvp, fcnp); 916 if (!error) { 917 xp->i_e2fs_nlink--; 918 xp->i_flag |= IN_CHANGE; 919 } 920 xp->i_flag &= ~IN_RENAME; 921 } 922 if (dp) 923 vput(fdvp); 924 if (xp) 925 vput(fvp); 926 vrele(ap->a_fvp); 927 return (error); 928 929 bad: 930 if (xp) 931 vput(ITOV(xp)); 932 vput(ITOV(dp)); 933 out: 934 if (doingdirectory) 935 ip->i_flag &= ~IN_RENAME; 936 if (VOP_LOCK(fvp) == 0) { 937 ip->i_e2fs_nlink--; 938 ip->i_flag |= IN_CHANGE; 939 vput(fvp); 940 } else 941 vrele(fvp); 942 return (error); 943 } 944 945 /* 946 * A virgin directory (no blushing please). 947 */ 948 static struct ext2fs_dirtemplate mastertemplate = { 949 0, 12, 1, ".", 950 0, - 12, 2, ".." /* XXX -12 should be e2fs_bsize-12 */ 951 }; 952 953 /* 954 * Mkdir system call 955 */ 956 int 957 ext2fs_mkdir(v) 958 void *v; 959 { 960 struct vop_mkdir_args /* { 961 struct vnode *a_dvp; 962 struct vnode **a_vpp; 963 struct componentname *a_cnp; 964 struct vattr *a_vap; 965 } */ *ap = v; 966 register struct vnode *dvp = ap->a_dvp; 967 register struct vattr *vap = ap->a_vap; 968 register struct componentname *cnp = ap->a_cnp; 969 register struct inode *ip, *dp; 970 struct vnode *tvp; 971 struct ext2fs_dirtemplate dirtemplate, *dtp; 972 struct timespec ts; 973 int error, dmode; 974 975 #ifdef DIAGNOSTIC 976 if ((cnp->cn_flags & HASBUF) == 0) 977 panic("ext2fs_mkdir: no name"); 978 #endif 979 dp = VTOI(dvp); 980 if ((nlink_t)dp->i_e2fs_nlink >= LINK_MAX) { 981 error = EMLINK; 982 goto out; 983 } 984 dmode = vap->va_mode & ACCESSPERMS; 985 dmode |= IFDIR; 986 /* 987 * Must simulate part of ext2fs_makeinode here to acquire the inode, 988 * but not have it entered in the parent directory. The entry is 989 * made later after writing "." and ".." entries. 990 */ 991 if ((error = VOP_VALLOC(dvp, dmode, cnp->cn_cred, &tvp)) != 0) 992 goto out; 993 ip = VTOI(tvp); 994 ip->i_e2fs_uid = cnp->cn_cred->cr_uid; 995 ip->i_e2fs_gid = dp->i_e2fs_gid; 996 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 997 ip->i_e2fs_mode = dmode; 998 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ 999 ip->i_e2fs_nlink = 2; 1000 TIMEVAL_TO_TIMESPEC(&time, &ts); 1001 error = VOP_UPDATE(tvp, &ts, &ts, 1); 1002 1003 /* 1004 * Bump link count in parent directory 1005 * to reflect work done below. Should 1006 * be done before reference is created 1007 * so reparation is possible if we crash. 1008 */ 1009 dp->i_e2fs_nlink++; 1010 dp->i_flag |= IN_CHANGE; 1011 if ((error = VOP_UPDATE(dvp, &ts, &ts, 1)) != 0) 1012 goto bad; 1013 1014 /* Initialize directory with "." and ".." from static template. */ 1015 dtp = &mastertemplate; 1016 dirtemplate = *dtp; 1017 dirtemplate.dot_ino = ip->i_number; 1018 dirtemplate.dotdot_ino = dp->i_number; 1019 /* Correct reclen of second entry */ 1020 dirtemplate.dotdot_reclen = VTOI(dvp)->i_e2fs->e2fs_bsize - 12; 1021 error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate, 1022 sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, 1023 IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (int *)0, (struct proc *)0); 1024 if (error) { 1025 dp->i_e2fs_nlink--; 1026 dp->i_flag |= IN_CHANGE; 1027 goto bad; 1028 } 1029 if (VTOI(dvp)->i_e2fs->e2fs_bsize > 1030 VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_bsize) 1031 panic("ext2fs_mkdir: blksize"); /* XXX should grow with balloc() */ 1032 else { 1033 ip->i_e2fs_size = VTOI(dvp)->i_e2fs->e2fs_bsize; 1034 ip->i_flag |= IN_CHANGE; 1035 } 1036 1037 /* Directory set up, now install it's entry in the parent directory. */ 1038 error = ext2fs_direnter(ip, dvp, cnp); 1039 if (error != 0) { 1040 dp->i_e2fs_nlink--; 1041 dp->i_flag |= IN_CHANGE; 1042 } 1043 bad: 1044 /* 1045 * No need to do an explicit VOP_TRUNCATE here, vrele will do this 1046 * for us because we set the link count to 0. 1047 */ 1048 if (error) { 1049 ip->i_e2fs_nlink = 0; 1050 ip->i_flag |= IN_CHANGE; 1051 vput(tvp); 1052 } else 1053 *ap->a_vpp = tvp; 1054 out: 1055 FREE(cnp->cn_pnbuf, M_NAMEI); 1056 vput(dvp); 1057 return (error); 1058 } 1059 1060 /* 1061 * Rmdir system call. 1062 */ 1063 int 1064 ext2fs_rmdir(v) 1065 void *v; 1066 { 1067 struct vop_rmdir_args /* { 1068 struct vnode *a_dvp; 1069 struct vnode *a_vp; 1070 struct componentname *a_cnp; 1071 } */ *ap = v; 1072 register struct vnode *vp = ap->a_vp; 1073 register struct vnode *dvp = ap->a_dvp; 1074 register struct componentname *cnp = ap->a_cnp; 1075 register struct inode *ip, *dp; 1076 int error; 1077 1078 ip = VTOI(vp); 1079 dp = VTOI(dvp); 1080 /* 1081 * No rmdir "." please. 1082 */ 1083 if (dp == ip) { 1084 vrele(dvp); 1085 vput(vp); 1086 return (EINVAL); 1087 } 1088 /* 1089 * Verify the directory is empty (and valid). 1090 * (Rmdir ".." won't be valid since 1091 * ".." will contain a reference to 1092 * the current directory and thus be 1093 * non-empty.) 1094 */ 1095 error = 0; 1096 if (ip->i_e2fs_nlink != 2 || 1097 !ext2fs_dirempty(ip, dp->i_number, cnp->cn_cred)) { 1098 error = ENOTEMPTY; 1099 goto out; 1100 } 1101 if ((dp->i_e2fs_flags & EXT2_APPEND) || 1102 (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND))) { 1103 error = EPERM; 1104 goto out; 1105 } 1106 /* 1107 * Delete reference to directory before purging 1108 * inode. If we crash in between, the directory 1109 * will be reattached to lost+found, 1110 */ 1111 error = ext2fs_dirremove(dvp, cnp); 1112 if (error != 0) 1113 goto out; 1114 dp->i_e2fs_nlink--; 1115 dp->i_flag |= IN_CHANGE; 1116 cache_purge(dvp); 1117 vput(dvp); 1118 dvp = NULL; 1119 /* 1120 * Truncate inode. The only stuff left 1121 * in the directory is "." and "..". The 1122 * "." reference is inconsequential since 1123 * we're quashing it. The ".." reference 1124 * has already been adjusted above. We've 1125 * removed the "." reference and the reference 1126 * in the parent directory, but there may be 1127 * other hard links so decrement by 2 and 1128 * worry about them later. 1129 */ 1130 ip->i_e2fs_nlink -= 2; 1131 error = VOP_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred, 1132 cnp->cn_proc); 1133 cache_purge(ITOV(ip)); 1134 out: 1135 if (dvp) 1136 vput(dvp); 1137 vput(vp); 1138 return (error); 1139 } 1140 1141 /* 1142 * symlink -- make a symbolic link 1143 */ 1144 int 1145 ext2fs_symlink(v) 1146 void *v; 1147 { 1148 struct vop_symlink_args /* { 1149 struct vnode *a_dvp; 1150 struct vnode **a_vpp; 1151 struct componentname *a_cnp; 1152 struct vattr *a_vap; 1153 char *a_target; 1154 } */ *ap = v; 1155 register struct vnode *vp, **vpp = ap->a_vpp; 1156 register struct inode *ip; 1157 int len, error; 1158 1159 error = ext2fs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, 1160 vpp, ap->a_cnp); 1161 if (error) 1162 return (error); 1163 vp = *vpp; 1164 len = strlen(ap->a_target); 1165 if (len < vp->v_mount->mnt_maxsymlinklen) { 1166 ip = VTOI(vp); 1167 bcopy(ap->a_target, (char *)ip->i_din.e2fs_din.e2di_shortlink, len); 1168 ip->i_e2fs_size = len; 1169 ip->i_flag |= IN_CHANGE | IN_UPDATE; 1170 } else 1171 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, 1172 UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, (int *)0, 1173 (struct proc *)0); 1174 vput(vp); 1175 return (error); 1176 } 1177 1178 /* 1179 * Return target name of a symbolic link 1180 */ 1181 int 1182 ext2fs_readlink(v) 1183 void *v; 1184 { 1185 struct vop_readlink_args /* { 1186 struct vnode *a_vp; 1187 struct uio *a_uio; 1188 struct ucred *a_cred; 1189 } */ *ap = v; 1190 register struct vnode *vp = ap->a_vp; 1191 register struct inode *ip = VTOI(vp); 1192 int isize; 1193 1194 isize = ip->i_e2fs_size; 1195 if (isize < vp->v_mount->mnt_maxsymlinklen || 1196 (vp->v_mount->mnt_maxsymlinklen == 0 && ip->i_e2fs_nblock == 0)) { 1197 uiomove((char *)ip->i_din.e2fs_din.e2di_shortlink, isize, ap->a_uio); 1198 return (0); 1199 } 1200 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); 1201 } 1202 1203 /* 1204 * Advisory record locking support 1205 */ 1206 int 1207 ext2fs_advlock(v) 1208 void *v; 1209 { 1210 struct vop_advlock_args /* { 1211 struct vnode *a_vp; 1212 caddr_t a_id; 1213 int a_op; 1214 struct flock *a_fl; 1215 int a_flags; 1216 } */ *ap = v; 1217 register struct inode *ip = VTOI(ap->a_vp); 1218 1219 return (lf_advlock(&ip->i_lockf, ip->i_e2fs_size, ap->a_id, ap->a_op, 1220 ap->a_fl, ap->a_flags)); 1221 } 1222 1223 /* 1224 * Initialize the vnode associated with a new inode, handle aliased 1225 * vnodes. 1226 */ 1227 int 1228 ext2fs_vinit(mntp, specops, fifoops, vpp) 1229 struct mount *mntp; 1230 int (**specops) __P((void *)); 1231 int (**fifoops) __P((void *)); 1232 struct vnode **vpp; 1233 { 1234 struct inode *ip; 1235 struct vnode *vp, *nvp; 1236 1237 vp = *vpp; 1238 ip = VTOI(vp); 1239 switch(vp->v_type = IFTOVT(ip->i_e2fs_mode)) { 1240 case VCHR: 1241 case VBLK: 1242 vp->v_op = specops; 1243 if ((nvp = checkalias(vp, ip->i_din.e2fs_din.e2di_rdev, mntp)) 1244 != NULL) { 1245 /* 1246 * Discard unneeded vnode, but save its inode. 1247 */ 1248 ufs_ihashrem(ip); 1249 VOP_UNLOCK(vp); 1250 nvp->v_data = vp->v_data; 1251 vp->v_data = NULL; 1252 vp->v_op = spec_vnodeop_p; 1253 vrele(vp); 1254 vgone(vp); 1255 /* 1256 * Reinitialize aliased inode. 1257 */ 1258 vp = nvp; 1259 ip->i_vnode = vp; 1260 ufs_ihashins(ip); 1261 } 1262 break; 1263 case VFIFO: 1264 #ifdef FIFO 1265 vp->v_op = fifoops; 1266 break; 1267 #else 1268 return (EOPNOTSUPP); 1269 #endif 1270 case VNON: 1271 case VBAD: 1272 case VSOCK: 1273 case VLNK: 1274 case VDIR: 1275 case VREG: 1276 break; 1277 } 1278 if (ip->i_number == ROOTINO) 1279 vp->v_flag |= VROOT; 1280 /* 1281 * Initialize modrev times 1282 */ 1283 SETHIGH(ip->i_modrev, mono_time.tv_sec); 1284 SETLOW(ip->i_modrev, mono_time.tv_usec * 4294); 1285 *vpp = vp; 1286 return (0); 1287 } 1288 1289 /* 1290 * Allocate a new inode. 1291 */ 1292 int 1293 ext2fs_makeinode(mode, dvp, vpp, cnp) 1294 int mode; 1295 struct vnode *dvp; 1296 struct vnode **vpp; 1297 struct componentname *cnp; 1298 { 1299 register struct inode *ip, *pdir; 1300 struct timespec ts; 1301 struct vnode *tvp; 1302 int error; 1303 1304 pdir = VTOI(dvp); 1305 #ifdef DIAGNOSTIC 1306 if ((cnp->cn_flags & HASBUF) == 0) 1307 panic("ext2fs_makeinode: no name"); 1308 #endif 1309 *vpp = NULL; 1310 if ((mode & IFMT) == 0) 1311 mode |= IFREG; 1312 1313 if ((error = VOP_VALLOC(dvp, mode, cnp->cn_cred, &tvp)) != 0) { 1314 free(cnp->cn_pnbuf, M_NAMEI); 1315 vput(dvp); 1316 return (error); 1317 } 1318 ip = VTOI(tvp); 1319 ip->i_e2fs_gid = pdir->i_e2fs_gid; 1320 ip->i_e2fs_uid = cnp->cn_cred->cr_uid; 1321 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1322 ip->i_e2fs_mode = mode; 1323 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ 1324 ip->i_e2fs_nlink = 1; 1325 if ((ip->i_e2fs_mode & ISGID) && 1326 !groupmember(ip->i_e2fs_gid, cnp->cn_cred) && 1327 suser(cnp->cn_cred, NULL)) 1328 ip->i_e2fs_mode &= ~ISGID; 1329 1330 /* 1331 * Make sure inode goes to disk before directory entry. 1332 */ 1333 TIMEVAL_TO_TIMESPEC(&time, &ts); 1334 if ((error = VOP_UPDATE(tvp, &ts, &ts, 1)) != 0) 1335 goto bad; 1336 error = ext2fs_direnter(ip, dvp, cnp); 1337 if (error != 0) 1338 goto bad; 1339 if ((cnp->cn_flags & SAVESTART) == 0) 1340 FREE(cnp->cn_pnbuf, M_NAMEI); 1341 vput(dvp); 1342 *vpp = tvp; 1343 return (0); 1344 1345 bad: 1346 /* 1347 * Write error occurred trying to update the inode 1348 * or the directory so must deallocate the inode. 1349 */ 1350 free(cnp->cn_pnbuf, M_NAMEI); 1351 vput(dvp); 1352 ip->i_e2fs_nlink = 0; 1353 ip->i_flag |= IN_CHANGE; 1354 vput(tvp); 1355 return (error); 1356 } 1357 1358 /* 1359 * Reclaim an inode so that it can be used for other purposes. 1360 */ 1361 int 1362 ext2fs_reclaim(v) 1363 void *v; 1364 { 1365 struct vop_reclaim_args /* { 1366 struct vnode *a_vp; 1367 } */ *ap = v; 1368 register struct vnode *vp = ap->a_vp; 1369 struct inode *ip; 1370 extern int prtactive; 1371 1372 if (prtactive && vp->v_usecount != 0) 1373 vprint("ext2fs_reclaim: pushing active", vp); 1374 /* 1375 * Remove the inode from its hash chain. 1376 */ 1377 ip = VTOI(vp); 1378 ufs_ihashrem(ip); 1379 /* 1380 * Purge old data structures associated with the inode. 1381 */ 1382 cache_purge(vp); 1383 if (ip->i_devvp) { 1384 vrele(ip->i_devvp); 1385 ip->i_devvp = 0; 1386 } 1387 1388 FREE(vp->v_data, M_EXT2FSNODE); 1389 vp->v_data = NULL; 1390 return (0); 1391 } 1392 1393 /* Global vfs data structures for ext2fs. */ 1394 int (**ext2fs_vnodeop_p) __P((void *)); 1395 struct vnodeopv_entry_desc ext2fs_vnodeop_entries[] = { 1396 { &vop_default_desc, vn_default_error }, 1397 { &vop_lookup_desc, ext2fs_lookup }, /* lookup */ 1398 { &vop_create_desc, ext2fs_create }, /* create */ 1399 { &vop_mknod_desc, ext2fs_mknod }, /* mknod */ 1400 { &vop_open_desc, ext2fs_open }, /* open */ 1401 { &vop_close_desc, ufs_close }, /* close */ 1402 { &vop_access_desc, ext2fs_access }, /* access */ 1403 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1404 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1405 { &vop_read_desc, ext2fs_read }, /* read */ 1406 { &vop_write_desc, ext2fs_write }, /* write */ 1407 { &vop_lease_desc, ufs_lease_check }, /* lease */ 1408 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 1409 { &vop_poll_desc, ufs_poll }, /* poll */ 1410 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 1411 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1412 { &vop_seek_desc, ufs_seek }, /* seek */ 1413 { &vop_remove_desc, ext2fs_remove }, /* remove */ 1414 { &vop_link_desc, ext2fs_link }, /* link */ 1415 { &vop_rename_desc, ext2fs_rename }, /* rename */ 1416 { &vop_mkdir_desc, ext2fs_mkdir }, /* mkdir */ 1417 { &vop_rmdir_desc, ext2fs_rmdir }, /* rmdir */ 1418 { &vop_symlink_desc, ext2fs_symlink }, /* symlink */ 1419 { &vop_readdir_desc, ext2fs_readdir }, /* readdir */ 1420 { &vop_readlink_desc, ext2fs_readlink },/* readlink */ 1421 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 1422 { &vop_inactive_desc, ext2fs_inactive },/* inactive */ 1423 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1424 { &vop_lock_desc, ufs_lock }, /* lock */ 1425 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1426 { &vop_bmap_desc, ext2fs_bmap }, /* bmap */ 1427 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 1428 { &vop_print_desc, ufs_print }, /* print */ 1429 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1430 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 1431 { &vop_advlock_desc, ext2fs_advlock }, /* advlock */ 1432 { &vop_blkatoff_desc, ext2fs_blkatoff },/* blkatoff */ 1433 { &vop_valloc_desc, ext2fs_valloc }, /* valloc */ 1434 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1435 { &vop_truncate_desc, ext2fs_truncate },/* truncate */ 1436 { &vop_update_desc, ext2fs_update }, /* update */ 1437 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1438 { (struct vnodeop_desc*)NULL, (int(*) __P((void*)))NULL } 1439 }; 1440 struct vnodeopv_desc ext2fs_vnodeop_opv_desc = 1441 { &ext2fs_vnodeop_p, ext2fs_vnodeop_entries }; 1442 1443 int (**ext2fs_specop_p) __P((void *)); 1444 struct vnodeopv_entry_desc ext2fs_specop_entries[] = { 1445 { &vop_default_desc, vn_default_error }, 1446 { &vop_lookup_desc, spec_lookup }, /* lookup */ 1447 { &vop_create_desc, spec_create }, /* create */ 1448 { &vop_mknod_desc, spec_mknod }, /* mknod */ 1449 { &vop_open_desc, spec_open }, /* open */ 1450 { &vop_close_desc, ufsspec_close }, /* close */ 1451 { &vop_access_desc, ext2fs_access }, /* access */ 1452 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1453 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1454 { &vop_read_desc, ufsspec_read }, /* read */ 1455 { &vop_write_desc, ufsspec_write }, /* write */ 1456 { &vop_lease_desc, spec_lease_check }, /* lease */ 1457 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 1458 { &vop_poll_desc, spec_poll }, /* poll */ 1459 { &vop_mmap_desc, spec_mmap }, /* mmap */ 1460 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1461 { &vop_seek_desc, spec_seek }, /* seek */ 1462 { &vop_remove_desc, spec_remove }, /* remove */ 1463 { &vop_link_desc, spec_link }, /* link */ 1464 { &vop_rename_desc, spec_rename }, /* rename */ 1465 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 1466 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 1467 { &vop_symlink_desc, spec_symlink }, /* symlink */ 1468 { &vop_readdir_desc, spec_readdir }, /* readdir */ 1469 { &vop_readlink_desc, spec_readlink }, /* readlink */ 1470 { &vop_abortop_desc, spec_abortop }, /* abortop */ 1471 { &vop_inactive_desc, ext2fs_inactive },/* inactive */ 1472 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1473 { &vop_lock_desc, ufs_lock }, /* lock */ 1474 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1475 { &vop_bmap_desc, spec_bmap }, /* bmap */ 1476 { &vop_strategy_desc, spec_strategy }, /* strategy */ 1477 { &vop_print_desc, ufs_print }, /* print */ 1478 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1479 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 1480 { &vop_advlock_desc, spec_advlock }, /* advlock */ 1481 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 1482 { &vop_valloc_desc, spec_valloc }, /* valloc */ 1483 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1484 { &vop_truncate_desc, spec_truncate }, /* truncate */ 1485 { &vop_update_desc, ext2fs_update }, /* update */ 1486 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1487 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 1488 }; 1489 struct vnodeopv_desc ext2fs_specop_opv_desc = 1490 { &ext2fs_specop_p, ext2fs_specop_entries }; 1491 1492 #ifdef FIFO 1493 int (**ext2fs_fifoop_p) __P((void *)); 1494 struct vnodeopv_entry_desc ext2fs_fifoop_entries[] = { 1495 { &vop_default_desc, vn_default_error }, 1496 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 1497 { &vop_create_desc, fifo_create }, /* create */ 1498 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 1499 { &vop_open_desc, fifo_open }, /* open */ 1500 { &vop_close_desc, ufsfifo_close }, /* close */ 1501 { &vop_access_desc, ext2fs_access }, /* access */ 1502 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1503 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1504 { &vop_read_desc, ufsfifo_read }, /* read */ 1505 { &vop_write_desc, ufsfifo_write }, /* write */ 1506 { &vop_lease_desc, fifo_lease_check }, /* lease */ 1507 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 1508 { &vop_poll_desc, fifo_poll }, /* poll */ 1509 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 1510 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1511 { &vop_seek_desc, fifo_seek }, /* seek */ 1512 { &vop_remove_desc, fifo_remove }, /* remove */ 1513 { &vop_link_desc, fifo_link }, /* link */ 1514 { &vop_rename_desc, fifo_rename }, /* rename */ 1515 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 1516 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 1517 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 1518 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 1519 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 1520 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 1521 { &vop_inactive_desc, ext2fs_inactive },/* inactive */ 1522 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1523 { &vop_lock_desc, ufs_lock }, /* lock */ 1524 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1525 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 1526 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 1527 { &vop_print_desc, ufs_print }, /* print */ 1528 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1529 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 1530 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 1531 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 1532 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 1533 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1534 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 1535 { &vop_update_desc, ext2fs_update }, /* update */ 1536 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1537 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 1538 }; 1539 struct vnodeopv_desc ext2fs_fifoop_opv_desc = 1540 { &ext2fs_fifoop_p, ext2fs_fifoop_entries }; 1541 #endif /* FIFO */ 1542
Indexes created Fri Sep 26 20:09:58 GMT 2025