ext2fs_vnops.c revision 1.32.2.6
1 /* $NetBSD: ext2fs_vnops.c,v 1.32.2.6 2002/10/18 02:45:47 nathanw 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/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: ext2fs_vnops.c,v 1.32.2.6 2002/10/18 02:45:47 nathanw Exp $"); 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/resourcevar.h> 51 #include <sys/kernel.h> 52 #include <sys/file.h> 53 #include <sys/stat.h> 54 #include <sys/buf.h> 55 #include <sys/proc.h> 56 #include <sys/mount.h> 57 #include <sys/namei.h> 58 #include <sys/vnode.h> 59 #include <sys/lockf.h> 60 #include <sys/malloc.h> 61 #include <sys/pool.h> 62 #include <sys/signalvar.h> 63 64 #include <miscfs/fifofs/fifo.h> 65 #include <miscfs/genfs/genfs.h> 66 #include <miscfs/specfs/specdev.h> 67 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 extern int prtactive; 77 78 static int ext2fs_chmod 79 __P((struct vnode *, int, struct ucred *, struct proc *)); 80 static int ext2fs_chown 81 __P((struct vnode *, uid_t, gid_t, struct ucred *, struct proc *)); 82 83 union _qcvt { 84 int64_t qcvt; 85 int32_t val[2]; 86 }; 87 #define SETHIGH(q, h) { \ 88 union _qcvt tmp; \ 89 tmp.qcvt = (q); \ 90 tmp.val[_QUAD_HIGHWORD] = (h); \ 91 (q) = tmp.qcvt; \ 92 } 93 #define SETLOW(q, l) { \ 94 union _qcvt tmp; \ 95 tmp.qcvt = (q); \ 96 tmp.val[_QUAD_LOWWORD] = (l); \ 97 (q) = tmp.qcvt; \ 98 } 99 100 /* 101 * Create a regular file 102 */ 103 int 104 ext2fs_create(v) 105 void *v; 106 { 107 struct vop_create_args /* { 108 struct vnode *a_dvp; 109 struct vnode **a_vpp; 110 struct componentname *a_cnp; 111 struct vattr *a_vap; 112 } */ *ap = v; 113 return ext2fs_makeinode(MAKEIMODE(ap->a_vap->va_type, 114 ap->a_vap->va_mode), 115 ap->a_dvp, ap->a_vpp, ap->a_cnp); 116 } 117 118 /* 119 * Mknod vnode call 120 */ 121 /* ARGSUSED */ 122 int 123 ext2fs_mknod(v) 124 void *v; 125 { 126 struct vop_mknod_args /* { 127 struct vnode *a_dvp; 128 struct vnode **a_vpp; 129 struct componentname *a_cnp; 130 struct vattr *a_vap; 131 } */ *ap = v; 132 struct vattr *vap = ap->a_vap; 133 struct vnode **vpp = ap->a_vpp; 134 struct inode *ip; 135 int error; 136 struct mount *mp; 137 ino_t ino; 138 139 if ((error = ext2fs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), 140 ap->a_dvp, vpp, ap->a_cnp)) != 0) 141 return (error); 142 ip = VTOI(*vpp); 143 mp = (*vpp)->v_mount; 144 ino = ip->i_number; 145 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 146 if (vap->va_rdev != VNOVAL) { 147 /* 148 * Want to be able to use this to make badblock 149 * inodes, so don't truncate the dev number. 150 */ 151 ip->i_din.e2fs_din.e2di_rdev = h2fs32(vap->va_rdev); 152 } 153 /* 154 * Remove inode so that it will be reloaded by VFS_VGET and 155 * checked to see if it is an alias of an existing entry in 156 * the inode cache. 157 */ 158 vput(*vpp); 159 (*vpp)->v_type = VNON; 160 vgone(*vpp); 161 error = VFS_VGET(mp, ino, vpp); 162 if (error != 0) { 163 *vpp = NULL; 164 return (error); 165 } 166 return (0); 167 } 168 169 /* 170 * Open called. 171 * 172 * Just check the APPEND flag. 173 */ 174 /* ARGSUSED */ 175 int 176 ext2fs_open(v) 177 void *v; 178 { 179 struct vop_open_args /* { 180 struct vnode *a_vp; 181 int a_mode; 182 struct ucred *a_cred; 183 struct proc *a_p; 184 } */ *ap = v; 185 186 /* 187 * Files marked append-only must be opened for appending. 188 */ 189 if ((VTOI(ap->a_vp)->i_e2fs_flags & EXT2_APPEND) && 190 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 191 return (EPERM); 192 return (0); 193 } 194 195 int 196 ext2fs_access(v) 197 void *v; 198 { 199 struct vop_access_args /* { 200 struct vnode *a_vp; 201 int a_mode; 202 struct ucred *a_cred; 203 struct proc *a_p; 204 } */ *ap = v; 205 struct vnode *vp = ap->a_vp; 206 struct inode *ip = VTOI(vp); 207 mode_t mode = ap->a_mode; 208 209 /* 210 * Disallow write attempts on read-only file systems; 211 * unless the file is a socket, fifo, or a block or 212 * character device resident on the file system. 213 */ 214 if (mode & VWRITE) { 215 switch (vp->v_type) { 216 case VDIR: 217 case VLNK: 218 case VREG: 219 if (vp->v_mount->mnt_flag & MNT_RDONLY) 220 return (EROFS); 221 break; 222 default: 223 break; 224 } 225 } 226 227 /* If immutable bit set, nobody gets to write it. */ 228 if ((mode & VWRITE) && (ip->i_e2fs_flags & EXT2_IMMUTABLE)) 229 return (EPERM); 230 231 return (vaccess(vp->v_type, ip->i_e2fs_mode & ALLPERMS, 232 ip->i_e2fs_uid, ip->i_e2fs_gid, mode, ap->a_cred)); 233 } 234 235 /* ARGSUSED */ 236 int 237 ext2fs_getattr(v) 238 void *v; 239 { 240 struct vop_getattr_args /* { 241 struct vnode *a_vp; 242 struct vattr *a_vap; 243 struct ucred *a_cred; 244 struct proc *a_p; 245 } */ *ap = v; 246 struct vnode *vp = ap->a_vp; 247 struct inode *ip = VTOI(vp); 248 struct vattr *vap = ap->a_vap; 249 struct timespec ts; 250 251 TIMEVAL_TO_TIMESPEC(&time, &ts); 252 EXT2FS_ITIMES(ip, &ts, &ts, &ts); 253 /* 254 * Copy from inode table 255 */ 256 vap->va_fsid = ip->i_dev; 257 vap->va_fileid = ip->i_number; 258 vap->va_mode = ip->i_e2fs_mode & ALLPERMS; 259 vap->va_nlink = ip->i_e2fs_nlink; 260 vap->va_uid = ip->i_e2fs_uid; 261 vap->va_gid = ip->i_e2fs_gid; 262 vap->va_rdev = (dev_t)fs2h32(ip->i_din.e2fs_din.e2di_rdev); 263 vap->va_size = vp->v_size; 264 vap->va_atime.tv_sec = ip->i_e2fs_atime; 265 vap->va_atime.tv_nsec = 0; 266 vap->va_mtime.tv_sec = ip->i_e2fs_mtime; 267 vap->va_mtime.tv_nsec = 0; 268 vap->va_ctime.tv_sec = ip->i_e2fs_ctime; 269 vap->va_ctime.tv_nsec = 0; 270 #ifdef EXT2FS_SYSTEM_FLAGS 271 vap->va_flags = (ip->i_e2fs_flags & EXT2_APPEND) ? SF_APPEND : 0; 272 vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0; 273 #else 274 vap->va_flags = (ip->i_e2fs_flags & EXT2_APPEND) ? UF_APPEND : 0; 275 vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? UF_IMMUTABLE : 0; 276 #endif 277 vap->va_gen = ip->i_e2fs_gen; 278 /* this doesn't belong here */ 279 if (vp->v_type == VBLK) 280 vap->va_blocksize = BLKDEV_IOSIZE; 281 else if (vp->v_type == VCHR) 282 vap->va_blocksize = MAXBSIZE; 283 else 284 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; 285 vap->va_bytes = dbtob((u_quad_t)ip->i_e2fs_nblock); 286 vap->va_type = vp->v_type; 287 vap->va_filerev = ip->i_modrev; 288 return (0); 289 } 290 291 /* 292 * Set attribute vnode op. called from several syscalls 293 */ 294 int 295 ext2fs_setattr(v) 296 void *v; 297 { 298 struct vop_setattr_args /* { 299 struct vnode *a_vp; 300 struct vattr *a_vap; 301 struct ucred *a_cred; 302 struct proc *a_p; 303 } */ *ap = v; 304 struct vattr *vap = ap->a_vap; 305 struct vnode *vp = ap->a_vp; 306 struct inode *ip = VTOI(vp); 307 struct ucred *cred = ap->a_cred; 308 struct proc *p = ap->a_p; 309 int error; 310 311 /* 312 * Check for unsettable attributes. 313 */ 314 if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) || 315 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 316 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 317 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 318 return (EINVAL); 319 } 320 if (vap->va_flags != VNOVAL) { 321 if (vp->v_mount->mnt_flag & MNT_RDONLY) 322 return (EROFS); 323 if (cred->cr_uid != ip->i_e2fs_uid && 324 (error = suser(cred, &p->p_acflag))) 325 return (error); 326 #ifdef EXT2FS_SYSTEM_FLAGS 327 if (cred->cr_uid == 0) { 328 if ((ip->i_e2fs_flags & 329 (EXT2_APPEND | EXT2_IMMUTABLE)) && securelevel > 0) 330 return (EPERM); 331 ip->i_e2fs_flags &= ~(EXT2_APPEND | EXT2_IMMUTABLE); 332 ip->i_e2fs_flags |= 333 (vap->va_flags & SF_APPEND) ? EXT2_APPEND : 0 | 334 (vap->va_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE : 0; 335 } else 336 return (EPERM); 337 #else 338 ip->i_e2fs_flags &= ~(EXT2_APPEND | EXT2_IMMUTABLE); 339 ip->i_e2fs_flags |= 340 (vap->va_flags & UF_APPEND) ? EXT2_APPEND : 0 | 341 (vap->va_flags & UF_IMMUTABLE) ? EXT2_IMMUTABLE : 0; 342 #endif 343 ip->i_flag |= IN_CHANGE; 344 if (vap->va_flags & (IMMUTABLE | APPEND)) 345 return (0); 346 } 347 if (ip->i_e2fs_flags & (EXT2_APPEND | EXT2_IMMUTABLE)) 348 return (EPERM); 349 /* 350 * Go through the fields and update iff not VNOVAL. 351 */ 352 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 353 if (vp->v_mount->mnt_flag & MNT_RDONLY) 354 return (EROFS); 355 error = ext2fs_chown(vp, vap->va_uid, vap->va_gid, cred, p); 356 if (error) 357 return (error); 358 } 359 if (vap->va_size != VNOVAL) { 360 /* 361 * Disallow write attempts on read-only file systems; 362 * unless the file is a socket, fifo, or a block or 363 * character device resident on the file system. 364 */ 365 switch (vp->v_type) { 366 case VDIR: 367 return (EISDIR); 368 case VLNK: 369 case VREG: 370 if (vp->v_mount->mnt_flag & MNT_RDONLY) 371 return (EROFS); 372 default: 373 break; 374 } 375 error = VOP_TRUNCATE(vp, vap->va_size, 0, cred, p); 376 if (error) 377 return (error); 378 } 379 ip = VTOI(vp); 380 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 381 if (vp->v_mount->mnt_flag & MNT_RDONLY) 382 return (EROFS); 383 if (cred->cr_uid != ip->i_e2fs_uid && 384 (error = suser(cred, &p->p_acflag)) && 385 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 386 (error = VOP_ACCESS(vp, VWRITE, cred, p)))) 387 return (error); 388 if (vap->va_atime.tv_sec != VNOVAL) 389 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 390 ip->i_flag |= IN_ACCESS; 391 if (vap->va_mtime.tv_sec != VNOVAL) 392 ip->i_flag |= IN_CHANGE | IN_UPDATE; 393 error = VOP_UPDATE(vp, &vap->va_atime, &vap->va_mtime, 394 UPDATE_WAIT); 395 if (error) 396 return (error); 397 } 398 error = 0; 399 if (vap->va_mode != (mode_t)VNOVAL) { 400 if (vp->v_mount->mnt_flag & MNT_RDONLY) 401 return (EROFS); 402 error = ext2fs_chmod(vp, (int)vap->va_mode, cred, p); 403 } 404 return (error); 405 } 406 407 /* 408 * Change the mode on a file. 409 * Inode must be locked before calling. 410 */ 411 static int 412 ext2fs_chmod(vp, mode, cred, p) 413 struct vnode *vp; 414 int mode; 415 struct ucred *cred; 416 struct proc *p; 417 { 418 struct inode *ip = VTOI(vp); 419 int error; 420 421 if (cred->cr_uid != ip->i_e2fs_uid && 422 (error = suser(cred, &p->p_acflag))) 423 return (error); 424 if (cred->cr_uid) { 425 if (vp->v_type != VDIR && (mode & S_ISTXT)) 426 return (EFTYPE); 427 if (!groupmember(ip->i_e2fs_gid, cred) && (mode & ISGID)) 428 return (EPERM); 429 } 430 ip->i_e2fs_mode &= ~ALLPERMS; 431 ip->i_e2fs_mode |= (mode & ALLPERMS); 432 ip->i_flag |= IN_CHANGE; 433 return (0); 434 } 435 436 /* 437 * Perform chown operation on inode ip; 438 * inode must be locked prior to call. 439 */ 440 static int 441 ext2fs_chown(vp, uid, gid, cred, p) 442 struct vnode *vp; 443 uid_t uid; 444 gid_t gid; 445 struct ucred *cred; 446 struct proc *p; 447 { 448 struct inode *ip = VTOI(vp); 449 uid_t ouid; 450 gid_t ogid; 451 int error = 0; 452 453 if (uid == (uid_t)VNOVAL) 454 uid = ip->i_e2fs_uid; 455 if (gid == (gid_t)VNOVAL) 456 gid = ip->i_e2fs_gid; 457 /* 458 * If we don't own the file, are trying to change the owner 459 * of the file, or are not a member of the target group, 460 * the caller must be superuser or the call fails. 461 */ 462 if ((cred->cr_uid != ip->i_e2fs_uid || uid != ip->i_e2fs_uid || 463 (gid != ip->i_e2fs_gid && !groupmember((gid_t)gid, cred))) && 464 (error = suser(cred, &p->p_acflag))) 465 return (error); 466 ogid = ip->i_e2fs_gid; 467 ouid = ip->i_e2fs_uid; 468 469 ip->i_e2fs_gid = gid; 470 ip->i_e2fs_uid = uid; 471 if (ouid != uid || ogid != gid) 472 ip->i_flag |= IN_CHANGE; 473 if (ouid != uid && cred->cr_uid != 0) 474 ip->i_e2fs_mode &= ~ISUID; 475 if (ogid != gid && cred->cr_uid != 0) 476 ip->i_e2fs_mode &= ~ISGID; 477 return (0); 478 } 479 480 int 481 ext2fs_remove(v) 482 void *v; 483 { 484 struct vop_remove_args /* { 485 struct vnode *a_dvp; 486 struct vnode *a_vp; 487 struct componentname *a_cnp; 488 } */ *ap = v; 489 struct inode *ip; 490 struct vnode *vp = ap->a_vp; 491 struct vnode *dvp = ap->a_dvp; 492 int error; 493 494 ip = VTOI(vp); 495 if (vp->v_type == VDIR || 496 (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 497 (VTOI(dvp)->i_e2fs_flags & EXT2_APPEND)) { 498 error = EPERM; 499 goto out; 500 } 501 error = ext2fs_dirremove(dvp, ap->a_cnp); 502 if (error == 0) { 503 ip->i_e2fs_nlink--; 504 ip->i_flag |= IN_CHANGE; 505 } 506 out: 507 if (dvp == vp) 508 vrele(vp); 509 else 510 vput(vp); 511 vput(dvp); 512 return (error); 513 } 514 515 /* 516 * link vnode call 517 */ 518 int 519 ext2fs_link(v) 520 void *v; 521 { 522 struct vop_link_args /* { 523 struct vnode *a_dvp; 524 struct vnode *a_vp; 525 struct componentname *a_cnp; 526 } */ *ap = v; 527 struct vnode *dvp = ap->a_dvp; 528 struct vnode *vp = ap->a_vp; 529 struct componentname *cnp = ap->a_cnp; 530 struct inode *ip; 531 int error; 532 533 #ifdef DIAGNOSTIC 534 if ((cnp->cn_flags & HASBUF) == 0) 535 panic("ext2fs_link: no name"); 536 #endif 537 if (vp->v_type == VDIR) { 538 VOP_ABORTOP(dvp, cnp); 539 error = EISDIR; 540 goto out2; 541 } 542 if (dvp->v_mount != vp->v_mount) { 543 VOP_ABORTOP(dvp, cnp); 544 error = EXDEV; 545 goto out2; 546 } 547 if (dvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE))) { 548 VOP_ABORTOP(dvp, cnp); 549 goto out2; 550 } 551 ip = VTOI(vp); 552 if ((nlink_t)ip->i_e2fs_nlink >= LINK_MAX) { 553 VOP_ABORTOP(dvp, cnp); 554 error = EMLINK; 555 goto out1; 556 } 557 if (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) { 558 VOP_ABORTOP(dvp, cnp); 559 error = EPERM; 560 goto out1; 561 } 562 ip->i_e2fs_nlink++; 563 ip->i_flag |= IN_CHANGE; 564 error = VOP_UPDATE(vp, NULL, NULL, UPDATE_WAIT); 565 if (!error) 566 error = ext2fs_direnter(ip, dvp, cnp); 567 if (error) { 568 ip->i_e2fs_nlink--; 569 ip->i_flag |= IN_CHANGE; 570 } 571 PNBUF_PUT(cnp->cn_pnbuf); 572 out1: 573 if (dvp != vp) 574 VOP_UNLOCK(vp, 0); 575 out2: 576 vput(dvp); 577 return (error); 578 } 579 580 /* 581 * Rename system call. 582 * rename("foo", "bar"); 583 * is essentially 584 * unlink("bar"); 585 * link("foo", "bar"); 586 * unlink("foo"); 587 * but ``atomically''. Can't do full commit without saving state in the 588 * inode on disk which isn't feasible at this time. Best we can do is 589 * always guarantee the target exists. 590 * 591 * Basic algorithm is: 592 * 593 * 1) Bump link count on source while we're linking it to the 594 * target. This also ensure the inode won't be deleted out 595 * from underneath us while we work (it may be truncated by 596 * a concurrent `trunc' or `open' for creation). 597 * 2) Link source to destination. If destination already exists, 598 * delete it first. 599 * 3) Unlink source reference to inode if still around. If a 600 * directory was moved and the parent of the destination 601 * is different from the source, patch the ".." entry in the 602 * directory. 603 */ 604 int 605 ext2fs_rename(v) 606 void *v; 607 { 608 struct vop_rename_args /* { 609 struct vnode *a_fdvp; 610 struct vnode *a_fvp; 611 struct componentname *a_fcnp; 612 struct vnode *a_tdvp; 613 struct vnode *a_tvp; 614 struct componentname *a_tcnp; 615 } */ *ap = v; 616 struct vnode *tvp = ap->a_tvp; 617 struct vnode *tdvp = ap->a_tdvp; 618 struct vnode *fvp = ap->a_fvp; 619 struct vnode *fdvp = ap->a_fdvp; 620 struct componentname *tcnp = ap->a_tcnp; 621 struct componentname *fcnp = ap->a_fcnp; 622 struct inode *ip, *xp, *dp; 623 struct ext2fs_dirtemplate dirbuf; 624 int doingdirectory = 0, oldparent = 0, newparent = 0; 625 int error = 0; 626 u_char namlen; 627 628 #ifdef DIAGNOSTIC 629 if ((tcnp->cn_flags & HASBUF) == 0 || 630 (fcnp->cn_flags & HASBUF) == 0) 631 panic("ext2fs_rename: no name"); 632 #endif 633 /* 634 * Check for cross-device rename. 635 */ 636 if ((fvp->v_mount != tdvp->v_mount) || 637 (tvp && (fvp->v_mount != tvp->v_mount))) { 638 error = EXDEV; 639 abortit: 640 VOP_ABORTOP(tdvp, tcnp); /* XXX, why not in NFS? */ 641 if (tdvp == tvp) 642 vrele(tdvp); 643 else 644 vput(tdvp); 645 if (tvp) 646 vput(tvp); 647 VOP_ABORTOP(fdvp, fcnp); /* XXX, why not in NFS? */ 648 vrele(fdvp); 649 vrele(fvp); 650 return (error); 651 } 652 653 /* 654 * Check if just deleting a link name. 655 */ 656 if (tvp && ((VTOI(tvp)->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 657 (VTOI(tdvp)->i_e2fs_flags & EXT2_APPEND))) { 658 error = EPERM; 659 goto abortit; 660 } 661 if (fvp == tvp) { 662 if (fvp->v_type == VDIR) { 663 error = EINVAL; 664 goto abortit; 665 } 666 667 /* Release destination completely. */ 668 VOP_ABORTOP(tdvp, tcnp); 669 vput(tdvp); 670 vput(tvp); 671 672 /* Delete source. */ 673 vrele(fdvp); 674 vrele(fvp); 675 fcnp->cn_flags &= ~MODMASK; 676 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 677 if ((fcnp->cn_flags & SAVESTART) == 0) 678 panic("ext2fs_rename: lost from startdir"); 679 fcnp->cn_nameiop = DELETE; 680 (void) relookup(fdvp, &fvp, fcnp); 681 return (VOP_REMOVE(fdvp, fvp, fcnp)); 682 } 683 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 684 goto abortit; 685 dp = VTOI(fdvp); 686 ip = VTOI(fvp); 687 if ((nlink_t) ip->i_e2fs_nlink >= LINK_MAX) { 688 VOP_UNLOCK(fvp, 0); 689 error = EMLINK; 690 goto abortit; 691 } 692 if ((ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 693 (dp->i_e2fs_flags & EXT2_APPEND)) { 694 VOP_UNLOCK(fvp, 0); 695 error = EPERM; 696 goto abortit; 697 } 698 if ((ip->i_e2fs_mode & IFMT) == IFDIR) { 699 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 700 if (!error && tvp) 701 error = VOP_ACCESS(tvp, VWRITE, tcnp->cn_cred, 702 tcnp->cn_proc); 703 if (error) { 704 VOP_UNLOCK(fvp, 0); 705 error = EACCES; 706 goto abortit; 707 } 708 /* 709 * Avoid ".", "..", and aliases of "." for obvious reasons. 710 */ 711 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 712 dp == ip || 713 (fcnp->cn_flags&ISDOTDOT) || 714 (tcnp->cn_flags & ISDOTDOT) || 715 (ip->i_flag & IN_RENAME)) { 716 VOP_UNLOCK(fvp, 0); 717 error = EINVAL; 718 goto abortit; 719 } 720 ip->i_flag |= IN_RENAME; 721 oldparent = dp->i_number; 722 doingdirectory++; 723 } 724 vrele(fdvp); 725 726 /* 727 * When the target exists, both the directory 728 * and target vnodes are returned locked. 729 */ 730 dp = VTOI(tdvp); 731 xp = NULL; 732 if (tvp) 733 xp = VTOI(tvp); 734 735 /* 736 * 1) Bump link count while we're moving stuff 737 * around. If we crash somewhere before 738 * completing our work, the link count 739 * may be wrong, but correctable. 740 */ 741 ip->i_e2fs_nlink++; 742 ip->i_flag |= IN_CHANGE; 743 if ((error = VOP_UPDATE(fvp, NULL, NULL, UPDATE_WAIT)) != 0) { 744 VOP_UNLOCK(fvp, 0); 745 goto bad; 746 } 747 748 /* 749 * If ".." must be changed (ie the directory gets a new 750 * parent) then the source directory must not be in the 751 * directory hierarchy above the target, as this would 752 * orphan everything below the source directory. Also 753 * the user must have write permission in the source so 754 * as to be able to change "..". We must repeat the call 755 * to namei, as the parent directory is unlocked by the 756 * call to checkpath(). 757 */ 758 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 759 VOP_UNLOCK(fvp, 0); 760 if (oldparent != dp->i_number) 761 newparent = dp->i_number; 762 if (doingdirectory && newparent) { 763 if (error) /* write access check above */ 764 goto bad; 765 if (xp != NULL) 766 vput(tvp); 767 error = ext2fs_checkpath(ip, dp, tcnp->cn_cred); 768 if (error != 0) 769 goto out; 770 if ((tcnp->cn_flags & SAVESTART) == 0) 771 panic("ext2fs_rename: lost to startdir"); 772 if ((error = relookup(tdvp, &tvp, tcnp)) != 0) 773 goto out; 774 dp = VTOI(tdvp); 775 xp = NULL; 776 if (tvp) 777 xp = VTOI(tvp); 778 } 779 /* 780 * 2) If target doesn't exist, link the target 781 * to the source and unlink the source. 782 * Otherwise, rewrite the target directory 783 * entry to reference the source inode and 784 * expunge the original entry's existence. 785 */ 786 if (xp == NULL) { 787 if (dp->i_dev != ip->i_dev) 788 panic("rename: EXDEV"); 789 /* 790 * Account for ".." in new directory. 791 * When source and destination have the same 792 * parent we don't fool with the link count. 793 */ 794 if (doingdirectory && newparent) { 795 if ((nlink_t)dp->i_e2fs_nlink >= LINK_MAX) { 796 error = EMLINK; 797 goto bad; 798 } 799 dp->i_e2fs_nlink++; 800 dp->i_flag |= IN_CHANGE; 801 if ((error = VOP_UPDATE(tdvp, NULL, NULL, UPDATE_WAIT)) 802 != 0) 803 goto bad; 804 } 805 error = ext2fs_direnter(ip, tdvp, tcnp); 806 if (error != 0) { 807 if (doingdirectory && newparent) { 808 dp->i_e2fs_nlink--; 809 dp->i_flag |= IN_CHANGE; 810 (void)VOP_UPDATE(tdvp, NULL, NULL, UPDATE_WAIT); 811 } 812 goto bad; 813 } 814 vput(tdvp); 815 } else { 816 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) 817 panic("rename: EXDEV"); 818 /* 819 * Short circuit rename(foo, foo). 820 */ 821 if (xp->i_number == ip->i_number) 822 panic("rename: same file"); 823 /* 824 * If the parent directory is "sticky", then the user must 825 * own the parent directory, or the destination of the rename, 826 * otherwise the destination may not be changed (except by 827 * root). This implements append-only directories. 828 */ 829 if ((dp->i_e2fs_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 && 830 tcnp->cn_cred->cr_uid != dp->i_e2fs_uid && 831 xp->i_e2fs_uid != tcnp->cn_cred->cr_uid) { 832 error = EPERM; 833 goto bad; 834 } 835 /* 836 * Target must be empty if a directory and have no links 837 * to it. Also, ensure source and target are compatible 838 * (both directories, or both not directories). 839 */ 840 if ((xp->i_e2fs_mode & IFMT) == IFDIR) { 841 if (!ext2fs_dirempty(xp, dp->i_number, tcnp->cn_cred) || 842 xp->i_e2fs_nlink > 2) { 843 error = ENOTEMPTY; 844 goto bad; 845 } 846 if (!doingdirectory) { 847 error = ENOTDIR; 848 goto bad; 849 } 850 cache_purge(tdvp); 851 } else if (doingdirectory) { 852 error = EISDIR; 853 goto bad; 854 } 855 error = ext2fs_dirrewrite(dp, ip, tcnp); 856 if (error != 0) 857 goto bad; 858 /* 859 * If the target directory is in the same 860 * directory as the source directory, 861 * decrement the link count on the parent 862 * of the target directory. 863 */ 864 if (doingdirectory && !newparent) { 865 dp->i_e2fs_nlink--; 866 dp->i_flag |= IN_CHANGE; 867 } 868 vput(tdvp); 869 /* 870 * Adjust the link count of the target to 871 * reflect the dirrewrite above. If this is 872 * a directory it is empty and there are 873 * no links to it, so we can squash the inode and 874 * any space associated with it. We disallowed 875 * renaming over top of a directory with links to 876 * it above, as the remaining link would point to 877 * a directory without "." or ".." entries. 878 */ 879 xp->i_e2fs_nlink--; 880 if (doingdirectory) { 881 if (--xp->i_e2fs_nlink != 0) 882 panic("rename: linked directory"); 883 error = VOP_TRUNCATE(tvp, (off_t)0, IO_SYNC, 884 tcnp->cn_cred, tcnp->cn_proc); 885 } 886 xp->i_flag |= IN_CHANGE; 887 vput(tvp); 888 xp = NULL; 889 } 890 891 /* 892 * 3) Unlink the source. 893 */ 894 fcnp->cn_flags &= ~MODMASK; 895 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 896 if ((fcnp->cn_flags & SAVESTART) == 0) 897 panic("ext2fs_rename: lost from startdir"); 898 (void) relookup(fdvp, &fvp, fcnp); 899 if (fvp != NULL) { 900 xp = VTOI(fvp); 901 dp = VTOI(fdvp); 902 } else { 903 /* 904 * From name has disappeared. 905 */ 906 if (doingdirectory) 907 panic("ext2fs_rename: lost dir entry"); 908 vrele(ap->a_fvp); 909 return (0); 910 } 911 /* 912 * Ensure that the directory entry still exists and has not 913 * changed while the new name has been entered. If the source is 914 * a file then the entry may have been unlinked or renamed. In 915 * either case there is no further work to be done. If the source 916 * is a directory then it cannot have been rmdir'ed; its link 917 * count of three would cause a rmdir to fail with ENOTEMPTY. 918 * The IRENAME flag ensures that it cannot be moved by another 919 * rename. 920 */ 921 if (xp != ip) { 922 if (doingdirectory) 923 panic("ext2fs_rename: lost dir entry"); 924 } else { 925 /* 926 * If the source is a directory with a 927 * new parent, the link count of the old 928 * parent directory must be decremented 929 * and ".." set to point to the new parent. 930 */ 931 if (doingdirectory && newparent) { 932 dp->i_e2fs_nlink--; 933 dp->i_flag |= IN_CHANGE; 934 error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf, 935 sizeof (struct ext2fs_dirtemplate), (off_t)0, 936 UIO_SYSSPACE, IO_NODELOCKED, 937 tcnp->cn_cred, (size_t *)0, (struct proc *)0); 938 if (error == 0) { 939 namlen = dirbuf.dotdot_namlen; 940 if (namlen != 2 || 941 dirbuf.dotdot_name[0] != '.' || 942 dirbuf.dotdot_name[1] != '.') { 943 ufs_dirbad(xp, (doff_t)12, 944 "ext2fs_rename: mangled dir"); 945 } else { 946 dirbuf.dotdot_ino = h2fs32(newparent); 947 (void) vn_rdwr(UIO_WRITE, fvp, 948 (caddr_t)&dirbuf, 949 sizeof (struct dirtemplate), 950 (off_t)0, UIO_SYSSPACE, 951 IO_NODELOCKED|IO_SYNC, 952 tcnp->cn_cred, (size_t *)0, 953 (struct proc *)0); 954 cache_purge(fdvp); 955 } 956 } 957 } 958 error = ext2fs_dirremove(fdvp, fcnp); 959 if (!error) { 960 xp->i_e2fs_nlink--; 961 xp->i_flag |= IN_CHANGE; 962 } 963 xp->i_flag &= ~IN_RENAME; 964 } 965 if (dp) 966 vput(fdvp); 967 if (xp) 968 vput(fvp); 969 vrele(ap->a_fvp); 970 return (error); 971 972 bad: 973 if (xp) 974 vput(ITOV(xp)); 975 vput(ITOV(dp)); 976 out: 977 if (doingdirectory) 978 ip->i_flag &= ~IN_RENAME; 979 if (vn_lock(fvp, LK_EXCLUSIVE) == 0) { 980 ip->i_e2fs_nlink--; 981 ip->i_flag |= IN_CHANGE; 982 vput(fvp); 983 } else 984 vrele(fvp); 985 return (error); 986 } 987 988 /* 989 * Mkdir system call 990 */ 991 int 992 ext2fs_mkdir(v) 993 void *v; 994 { 995 struct vop_mkdir_args /* { 996 struct vnode *a_dvp; 997 struct vnode **a_vpp; 998 struct componentname *a_cnp; 999 struct vattr *a_vap; 1000 } */ *ap = v; 1001 struct vnode *dvp = ap->a_dvp; 1002 struct vattr *vap = ap->a_vap; 1003 struct componentname *cnp = ap->a_cnp; 1004 struct inode *ip, *dp; 1005 struct vnode *tvp; 1006 struct ext2fs_dirtemplate dirtemplate; 1007 int error, dmode; 1008 1009 #ifdef DIAGNOSTIC 1010 if ((cnp->cn_flags & HASBUF) == 0) 1011 panic("ext2fs_mkdir: no name"); 1012 #endif 1013 dp = VTOI(dvp); 1014 if ((nlink_t)dp->i_e2fs_nlink >= LINK_MAX) { 1015 error = EMLINK; 1016 goto out; 1017 } 1018 dmode = vap->va_mode & ACCESSPERMS; 1019 dmode |= IFDIR; 1020 /* 1021 * Must simulate part of ext2fs_makeinode here to acquire the inode, 1022 * but not have it entered in the parent directory. The entry is 1023 * made later after writing "." and ".." entries. 1024 */ 1025 if ((error = VOP_VALLOC(dvp, dmode, cnp->cn_cred, &tvp)) != 0) 1026 goto out; 1027 ip = VTOI(tvp); 1028 ip->i_e2fs_uid = cnp->cn_cred->cr_uid; 1029 ip->i_e2fs_gid = dp->i_e2fs_gid; 1030 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1031 ip->i_e2fs_mode = dmode; 1032 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ 1033 ip->i_e2fs_nlink = 2; 1034 error = VOP_UPDATE(tvp, NULL, NULL, UPDATE_WAIT); 1035 1036 /* 1037 * Bump link count in parent directory 1038 * to reflect work done below. Should 1039 * be done before reference is created 1040 * so reparation is possible if we crash. 1041 */ 1042 dp->i_e2fs_nlink++; 1043 dp->i_flag |= IN_CHANGE; 1044 if ((error = VOP_UPDATE(dvp, NULL, NULL, UPDATE_WAIT)) != 0) 1045 goto bad; 1046 1047 /* Initialize directory with "." and ".." from static template. */ 1048 memset(&dirtemplate, 0, sizeof(dirtemplate)); 1049 dirtemplate.dot_ino = h2fs32(ip->i_number); 1050 dirtemplate.dot_reclen = h2fs16(12); 1051 dirtemplate.dot_namlen = 1; 1052 if (ip->i_e2fs->e2fs.e2fs_rev > E2FS_REV0 && 1053 (ip->i_e2fs->e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) { 1054 dirtemplate.dot_type = EXT2_FT_DIR; 1055 } 1056 dirtemplate.dot_name[0] = '.'; 1057 dirtemplate.dotdot_ino = h2fs32(dp->i_number); 1058 dirtemplate.dotdot_reclen = h2fs16(VTOI(dvp)->i_e2fs->e2fs_bsize - 12); 1059 dirtemplate.dotdot_namlen = 2; 1060 if (ip->i_e2fs->e2fs.e2fs_rev > E2FS_REV0 && 1061 (ip->i_e2fs->e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) { 1062 dirtemplate.dotdot_type = EXT2_FT_DIR; 1063 } 1064 dirtemplate.dotdot_name[0] = dirtemplate.dotdot_name[1] = '.'; 1065 error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate, 1066 sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, 1067 IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (size_t *)0, (struct proc *)0); 1068 if (error) { 1069 dp->i_e2fs_nlink--; 1070 dp->i_flag |= IN_CHANGE; 1071 goto bad; 1072 } 1073 if (VTOI(dvp)->i_e2fs->e2fs_bsize > 1074 VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_bsize) 1075 panic("ext2fs_mkdir: blksize"); /* XXX should grow with balloc() */ 1076 else { 1077 ip->i_e2fs_size = VTOI(dvp)->i_e2fs->e2fs_bsize; 1078 ip->i_flag |= IN_CHANGE; 1079 } 1080 1081 /* Directory set up, now install it's entry in the parent directory. */ 1082 error = ext2fs_direnter(ip, dvp, cnp); 1083 if (error != 0) { 1084 dp->i_e2fs_nlink--; 1085 dp->i_flag |= IN_CHANGE; 1086 } 1087 bad: 1088 /* 1089 * No need to do an explicit VOP_TRUNCATE here, vrele will do this 1090 * for us because we set the link count to 0. 1091 */ 1092 if (error) { 1093 ip->i_e2fs_nlink = 0; 1094 ip->i_flag |= IN_CHANGE; 1095 vput(tvp); 1096 } else 1097 *ap->a_vpp = tvp; 1098 out: 1099 PNBUF_PUT(cnp->cn_pnbuf); 1100 vput(dvp); 1101 return (error); 1102 } 1103 1104 /* 1105 * Rmdir system call. 1106 */ 1107 int 1108 ext2fs_rmdir(v) 1109 void *v; 1110 { 1111 struct vop_rmdir_args /* { 1112 struct vnode *a_dvp; 1113 struct vnode *a_vp; 1114 struct componentname *a_cnp; 1115 } */ *ap = v; 1116 struct vnode *vp = ap->a_vp; 1117 struct vnode *dvp = ap->a_dvp; 1118 struct componentname *cnp = ap->a_cnp; 1119 struct inode *ip, *dp; 1120 int error; 1121 1122 ip = VTOI(vp); 1123 dp = VTOI(dvp); 1124 /* 1125 * No rmdir "." please. 1126 */ 1127 if (dp == ip) { 1128 vrele(dvp); 1129 vput(vp); 1130 return (EINVAL); 1131 } 1132 /* 1133 * Verify the directory is empty (and valid). 1134 * (Rmdir ".." won't be valid since 1135 * ".." will contain a reference to 1136 * the current directory and thus be 1137 * non-empty.) 1138 */ 1139 error = 0; 1140 if (ip->i_e2fs_nlink != 2 || 1141 !ext2fs_dirempty(ip, dp->i_number, cnp->cn_cred)) { 1142 error = ENOTEMPTY; 1143 goto out; 1144 } 1145 if ((dp->i_e2fs_flags & EXT2_APPEND) || 1146 (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND))) { 1147 error = EPERM; 1148 goto out; 1149 } 1150 /* 1151 * Delete reference to directory before purging 1152 * inode. If we crash in between, the directory 1153 * will be reattached to lost+found, 1154 */ 1155 error = ext2fs_dirremove(dvp, cnp); 1156 if (error != 0) 1157 goto out; 1158 dp->i_e2fs_nlink--; 1159 dp->i_flag |= IN_CHANGE; 1160 cache_purge(dvp); 1161 vput(dvp); 1162 dvp = NULL; 1163 /* 1164 * Truncate inode. The only stuff left 1165 * in the directory is "." and "..". The 1166 * "." reference is inconsequential since 1167 * we're quashing it. The ".." reference 1168 * has already been adjusted above. We've 1169 * removed the "." reference and the reference 1170 * in the parent directory, but there may be 1171 * other hard links so decrement by 2 and 1172 * worry about them later. 1173 */ 1174 ip->i_e2fs_nlink -= 2; 1175 error = VOP_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred, 1176 cnp->cn_proc); 1177 cache_purge(ITOV(ip)); 1178 out: 1179 if (dvp) 1180 vput(dvp); 1181 vput(vp); 1182 return (error); 1183 } 1184 1185 /* 1186 * symlink -- make a symbolic link 1187 */ 1188 int 1189 ext2fs_symlink(v) 1190 void *v; 1191 { 1192 struct vop_symlink_args /* { 1193 struct vnode *a_dvp; 1194 struct vnode **a_vpp; 1195 struct componentname *a_cnp; 1196 struct vattr *a_vap; 1197 char *a_target; 1198 } */ *ap = v; 1199 struct vnode *vp, **vpp = ap->a_vpp; 1200 struct inode *ip; 1201 int len, error; 1202 1203 error = ext2fs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, 1204 vpp, ap->a_cnp); 1205 if (error) 1206 return (error); 1207 vp = *vpp; 1208 len = strlen(ap->a_target); 1209 if (len < vp->v_mount->mnt_maxsymlinklen) { 1210 ip = VTOI(vp); 1211 memcpy((char *)ip->i_din.e2fs_din.e2di_shortlink, ap->a_target, len); 1212 ip->i_e2fs_size = len; 1213 ip->i_flag |= IN_CHANGE | IN_UPDATE; 1214 } else 1215 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, 1216 UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, 1217 (size_t *)0, (struct proc *)0); 1218 if (error) 1219 vput(vp); 1220 return (error); 1221 } 1222 1223 /* 1224 * Return target name of a symbolic link 1225 */ 1226 int 1227 ext2fs_readlink(v) 1228 void *v; 1229 { 1230 struct vop_readlink_args /* { 1231 struct vnode *a_vp; 1232 struct uio *a_uio; 1233 struct ucred *a_cred; 1234 } */ *ap = v; 1235 struct vnode *vp = ap->a_vp; 1236 struct inode *ip = VTOI(vp); 1237 int isize; 1238 1239 isize = ip->i_e2fs_size; 1240 if (isize < vp->v_mount->mnt_maxsymlinklen || 1241 (vp->v_mount->mnt_maxsymlinklen == 0 && ip->i_e2fs_nblock == 0)) { 1242 uiomove((char *)ip->i_din.e2fs_din.e2di_shortlink, isize, ap->a_uio); 1243 return (0); 1244 } 1245 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); 1246 } 1247 1248 /* 1249 * Advisory record locking support 1250 */ 1251 int 1252 ext2fs_advlock(v) 1253 void *v; 1254 { 1255 struct vop_advlock_args /* { 1256 struct vnode *a_vp; 1257 caddr_t a_id; 1258 int a_op; 1259 struct flock *a_fl; 1260 int a_flags; 1261 } */ *ap = v; 1262 struct inode *ip = VTOI(ap->a_vp); 1263 1264 return lf_advlock(ap, &ip->i_lockf, ip->i_e2fs_size); 1265 } 1266 1267 /* 1268 * Initialize the vnode associated with a new inode, handle aliased 1269 * vnodes. 1270 */ 1271 int 1272 ext2fs_vinit(mntp, specops, fifoops, vpp) 1273 struct mount *mntp; 1274 int (**specops) __P((void *)); 1275 int (**fifoops) __P((void *)); 1276 struct vnode **vpp; 1277 { 1278 struct inode *ip; 1279 struct vnode *vp, *nvp; 1280 1281 vp = *vpp; 1282 ip = VTOI(vp); 1283 switch(vp->v_type = IFTOVT(ip->i_e2fs_mode)) { 1284 case VCHR: 1285 case VBLK: 1286 vp->v_op = specops; 1287 if ((nvp = checkalias(vp, 1288 fs2h32(ip->i_din.e2fs_din.e2di_rdev), mntp)) != NULL) { 1289 /* 1290 * Discard unneeded vnode, but save its inode. 1291 */ 1292 nvp->v_data = vp->v_data; 1293 vp->v_data = NULL; 1294 VOP_UNLOCK(vp, 0); 1295 vp->v_op = spec_vnodeop_p; 1296 vrele(vp); 1297 vgone(vp); 1298 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 1299 /* 1300 * Reinitialize aliased inode. 1301 */ 1302 vp = nvp; 1303 ip->i_vnode = vp; 1304 } 1305 break; 1306 case VFIFO: 1307 vp->v_op = fifoops; 1308 break; 1309 case VNON: 1310 case VBAD: 1311 case VSOCK: 1312 case VLNK: 1313 case VDIR: 1314 case VREG: 1315 break; 1316 } 1317 if (ip->i_number == ROOTINO) 1318 vp->v_flag |= VROOT; 1319 /* 1320 * Initialize modrev times 1321 */ 1322 SETHIGH(ip->i_modrev, mono_time.tv_sec); 1323 SETLOW(ip->i_modrev, mono_time.tv_usec * 4294); 1324 *vpp = vp; 1325 return (0); 1326 } 1327 1328 /* 1329 * Allocate a new inode. 1330 */ 1331 int 1332 ext2fs_makeinode(mode, dvp, vpp, cnp) 1333 int mode; 1334 struct vnode *dvp; 1335 struct vnode **vpp; 1336 struct componentname *cnp; 1337 { 1338 struct inode *ip, *pdir; 1339 struct vnode *tvp; 1340 int error; 1341 1342 pdir = VTOI(dvp); 1343 #ifdef DIAGNOSTIC 1344 if ((cnp->cn_flags & HASBUF) == 0) 1345 panic("ext2fs_makeinode: no name"); 1346 #endif 1347 *vpp = NULL; 1348 if ((mode & IFMT) == 0) 1349 mode |= IFREG; 1350 1351 if ((error = VOP_VALLOC(dvp, mode, cnp->cn_cred, &tvp)) != 0) { 1352 PNBUF_PUT(cnp->cn_pnbuf); 1353 vput(dvp); 1354 return (error); 1355 } 1356 ip = VTOI(tvp); 1357 ip->i_e2fs_gid = pdir->i_e2fs_gid; 1358 ip->i_e2fs_uid = cnp->cn_cred->cr_uid; 1359 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1360 ip->i_e2fs_mode = mode; 1361 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ 1362 ip->i_e2fs_nlink = 1; 1363 if ((ip->i_e2fs_mode & ISGID) && 1364 !groupmember(ip->i_e2fs_gid, cnp->cn_cred) && 1365 suser(cnp->cn_cred, NULL)) 1366 ip->i_e2fs_mode &= ~ISGID; 1367 1368 /* 1369 * Make sure inode goes to disk before directory entry. 1370 */ 1371 if ((error = VOP_UPDATE(tvp, NULL, NULL, UPDATE_WAIT)) != 0) 1372 goto bad; 1373 error = ext2fs_direnter(ip, dvp, cnp); 1374 if (error != 0) 1375 goto bad; 1376 if ((cnp->cn_flags & SAVESTART) == 0) 1377 PNBUF_PUT(cnp->cn_pnbuf); 1378 vput(dvp); 1379 *vpp = tvp; 1380 return (0); 1381 1382 bad: 1383 /* 1384 * Write error occurred trying to update the inode 1385 * or the directory so must deallocate the inode. 1386 */ 1387 PNBUF_PUT(cnp->cn_pnbuf); 1388 vput(dvp); 1389 ip->i_e2fs_nlink = 0; 1390 ip->i_flag |= IN_CHANGE; 1391 vput(tvp); 1392 return (error); 1393 } 1394 1395 /* 1396 * Reclaim an inode so that it can be used for other purposes. 1397 */ 1398 int 1399 ext2fs_reclaim(v) 1400 void *v; 1401 { 1402 struct vop_reclaim_args /* { 1403 struct vnode *a_vp; 1404 } */ *ap = v; 1405 struct vnode *vp = ap->a_vp; 1406 struct inode *ip; 1407 1408 if (prtactive && vp->v_usecount != 0) 1409 vprint("ext2fs_reclaim: pushing active", vp); 1410 /* 1411 * Remove the inode from its hash chain. 1412 */ 1413 ip = VTOI(vp); 1414 ufs_ihashrem(ip); 1415 /* 1416 * Purge old data structures associated with the inode. 1417 */ 1418 cache_purge(vp); 1419 if (ip->i_devvp) { 1420 vrele(ip->i_devvp); 1421 ip->i_devvp = 0; 1422 } 1423 1424 pool_put(&ext2fs_inode_pool, vp->v_data); 1425 vp->v_data = NULL; 1426 return (0); 1427 } 1428 1429 /* Global vfs data structures for ext2fs. */ 1430 int (**ext2fs_vnodeop_p) __P((void *)); 1431 const struct vnodeopv_entry_desc ext2fs_vnodeop_entries[] = { 1432 { &vop_default_desc, vn_default_error }, 1433 { &vop_lookup_desc, ext2fs_lookup }, /* lookup */ 1434 { &vop_create_desc, ext2fs_create }, /* create */ 1435 { &vop_mknod_desc, ext2fs_mknod }, /* mknod */ 1436 { &vop_open_desc, ext2fs_open }, /* open */ 1437 { &vop_close_desc, ufs_close }, /* close */ 1438 { &vop_access_desc, ext2fs_access }, /* access */ 1439 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1440 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1441 { &vop_read_desc, ext2fs_read }, /* read */ 1442 { &vop_write_desc, ext2fs_write }, /* write */ 1443 { &vop_lease_desc, ufs_lease_check }, /* lease */ 1444 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 1445 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 1446 { &vop_poll_desc, ufs_poll }, /* poll */ 1447 { &vop_revoke_desc, ufs_revoke }, /* revoke */ 1448 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 1449 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1450 { &vop_seek_desc, ufs_seek }, /* seek */ 1451 { &vop_remove_desc, ext2fs_remove }, /* remove */ 1452 { &vop_link_desc, ext2fs_link }, /* link */ 1453 { &vop_rename_desc, ext2fs_rename }, /* rename */ 1454 { &vop_mkdir_desc, ext2fs_mkdir }, /* mkdir */ 1455 { &vop_rmdir_desc, ext2fs_rmdir }, /* rmdir */ 1456 { &vop_symlink_desc, ext2fs_symlink }, /* symlink */ 1457 { &vop_readdir_desc, ext2fs_readdir }, /* readdir */ 1458 { &vop_readlink_desc, ext2fs_readlink }, /* readlink */ 1459 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 1460 { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ 1461 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1462 { &vop_lock_desc, ufs_lock }, /* lock */ 1463 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1464 { &vop_bmap_desc, ext2fs_bmap }, /* bmap */ 1465 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 1466 { &vop_print_desc, ufs_print }, /* print */ 1467 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1468 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 1469 { &vop_advlock_desc, ext2fs_advlock }, /* advlock */ 1470 { &vop_blkatoff_desc, ext2fs_blkatoff }, /* blkatoff */ 1471 { &vop_valloc_desc, ext2fs_valloc }, /* valloc */ 1472 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1473 { &vop_truncate_desc, ext2fs_truncate }, /* truncate */ 1474 { &vop_update_desc, ext2fs_update }, /* update */ 1475 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1476 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 1477 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 1478 { NULL, NULL } 1479 }; 1480 const struct vnodeopv_desc ext2fs_vnodeop_opv_desc = 1481 { &ext2fs_vnodeop_p, ext2fs_vnodeop_entries }; 1482 1483 int (**ext2fs_specop_p) __P((void *)); 1484 const struct vnodeopv_entry_desc ext2fs_specop_entries[] = { 1485 { &vop_default_desc, vn_default_error }, 1486 { &vop_lookup_desc, spec_lookup }, /* lookup */ 1487 { &vop_create_desc, spec_create }, /* create */ 1488 { &vop_mknod_desc, spec_mknod }, /* mknod */ 1489 { &vop_open_desc, spec_open }, /* open */ 1490 { &vop_close_desc, ufsspec_close }, /* close */ 1491 { &vop_access_desc, ext2fs_access }, /* access */ 1492 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1493 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1494 { &vop_read_desc, ufsspec_read }, /* read */ 1495 { &vop_write_desc, ufsspec_write }, /* write */ 1496 { &vop_lease_desc, spec_lease_check }, /* lease */ 1497 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 1498 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 1499 { &vop_poll_desc, spec_poll }, /* poll */ 1500 { &vop_revoke_desc, spec_revoke }, /* revoke */ 1501 { &vop_mmap_desc, spec_mmap }, /* mmap */ 1502 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1503 { &vop_seek_desc, spec_seek }, /* seek */ 1504 { &vop_remove_desc, spec_remove }, /* remove */ 1505 { &vop_link_desc, spec_link }, /* link */ 1506 { &vop_rename_desc, spec_rename }, /* rename */ 1507 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 1508 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 1509 { &vop_symlink_desc, spec_symlink }, /* symlink */ 1510 { &vop_readdir_desc, spec_readdir }, /* readdir */ 1511 { &vop_readlink_desc, spec_readlink }, /* readlink */ 1512 { &vop_abortop_desc, spec_abortop }, /* abortop */ 1513 { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ 1514 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1515 { &vop_lock_desc, ufs_lock }, /* lock */ 1516 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1517 { &vop_bmap_desc, spec_bmap }, /* bmap */ 1518 { &vop_strategy_desc, spec_strategy }, /* strategy */ 1519 { &vop_print_desc, ufs_print }, /* print */ 1520 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1521 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 1522 { &vop_advlock_desc, spec_advlock }, /* advlock */ 1523 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 1524 { &vop_valloc_desc, spec_valloc }, /* valloc */ 1525 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1526 { &vop_truncate_desc, spec_truncate }, /* truncate */ 1527 { &vop_update_desc, ext2fs_update }, /* update */ 1528 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1529 { &vop_getpages_desc, spec_getpages }, /* getpages */ 1530 { &vop_putpages_desc, spec_putpages }, /* putpages */ 1531 { NULL, NULL } 1532 }; 1533 const struct vnodeopv_desc ext2fs_specop_opv_desc = 1534 { &ext2fs_specop_p, ext2fs_specop_entries }; 1535 1536 int (**ext2fs_fifoop_p) __P((void *)); 1537 const struct vnodeopv_entry_desc ext2fs_fifoop_entries[] = { 1538 { &vop_default_desc, vn_default_error }, 1539 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 1540 { &vop_create_desc, fifo_create }, /* create */ 1541 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 1542 { &vop_open_desc, fifo_open }, /* open */ 1543 { &vop_close_desc, ufsfifo_close }, /* close */ 1544 { &vop_access_desc, ext2fs_access }, /* access */ 1545 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1546 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1547 { &vop_read_desc, ufsfifo_read }, /* read */ 1548 { &vop_write_desc, ufsfifo_write }, /* write */ 1549 { &vop_lease_desc, fifo_lease_check }, /* lease */ 1550 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 1551 { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */ 1552 { &vop_poll_desc, fifo_poll }, /* poll */ 1553 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 1554 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 1555 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1556 { &vop_seek_desc, fifo_seek }, /* seek */ 1557 { &vop_remove_desc, fifo_remove }, /* remove */ 1558 { &vop_link_desc, fifo_link }, /* link */ 1559 { &vop_rename_desc, fifo_rename }, /* rename */ 1560 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 1561 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 1562 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 1563 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 1564 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 1565 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 1566 { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ 1567 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1568 { &vop_lock_desc, ufs_lock }, /* lock */ 1569 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1570 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 1571 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 1572 { &vop_print_desc, ufs_print }, /* print */ 1573 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1574 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 1575 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 1576 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 1577 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 1578 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1579 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 1580 { &vop_update_desc, ext2fs_update }, /* update */ 1581 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1582 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 1583 { NULL, NULL } 1584 }; 1585 const struct vnodeopv_desc ext2fs_fifoop_opv_desc = 1586 { &ext2fs_fifoop_p, ext2fs_fifoop_entries }; 1587
Indexes created Sun Oct 19 16:10:00 GMT 2025