ext2fs_vnops.c revision 1.13
1 /* $NetBSD: ext2fs_vnops.c,v 1.13 1998/08/09 20:15:39 perry 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 "opt_uvm.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/resourcevar.h> 50 #include <sys/kernel.h> 51 #include <sys/file.h> 52 #include <sys/stat.h> 53 #include <sys/buf.h> 54 #include <sys/proc.h> 55 #include <sys/conf.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/signalvar.h> 62 63 #include <vm/vm.h> 64 #if defined(UVM) 65 #include <uvm/uvm_extern.h> 66 #endif 67 68 #include <miscfs/fifofs/fifo.h> 69 #include <miscfs/genfs/genfs.h> 70 #include <miscfs/specfs/specdev.h> 71 72 #include <ufs/ufs/quota.h> 73 #include <ufs/ufs/inode.h> 74 #include <ufs/ufs/ufs_extern.h> 75 #include <ufs/ufs/ufsmount.h> 76 77 #include <ufs/ext2fs/ext2fs.h> 78 #include <ufs/ext2fs/ext2fs_extern.h> 79 #include <ufs/ext2fs/ext2fs_dir.h> 80 81 82 static int ext2fs_chmod 83 __P((struct vnode *, int, struct ucred *, struct proc *)); 84 static int ext2fs_chown 85 __P((struct vnode *, uid_t, gid_t, struct ucred *, struct proc *)); 86 87 union _qcvt { 88 int64_t qcvt; 89 int32_t val[2]; 90 }; 91 #define SETHIGH(q, h) { \ 92 union _qcvt tmp; \ 93 tmp.qcvt = (q); \ 94 tmp.val[_QUAD_HIGHWORD] = (h); \ 95 (q) = tmp.qcvt; \ 96 } 97 #define SETLOW(q, l) { \ 98 union _qcvt tmp; \ 99 tmp.qcvt = (q); \ 100 tmp.val[_QUAD_LOWWORD] = (l); \ 101 (q) = tmp.qcvt; \ 102 } 103 104 /* 105 * Create a regular file 106 */ 107 int 108 ext2fs_create(v) 109 void *v; 110 { 111 struct vop_create_args /* { 112 struct vnode *a_dvp; 113 struct vnode **a_vpp; 114 struct componentname *a_cnp; 115 struct vattr *a_vap; 116 } */ *ap = v; 117 return ext2fs_makeinode(MAKEIMODE(ap->a_vap->va_type, 118 ap->a_vap->va_mode), 119 ap->a_dvp, ap->a_vpp, ap->a_cnp); 120 } 121 122 /* 123 * Mknod vnode call 124 */ 125 /* ARGSUSED */ 126 int 127 ext2fs_mknod(v) 128 void *v; 129 { 130 struct vop_mknod_args /* { 131 struct vnode *a_dvp; 132 struct vnode **a_vpp; 133 struct componentname *a_cnp; 134 struct vattr *a_vap; 135 } */ *ap = v; 136 register struct vattr *vap = ap->a_vap; 137 register struct vnode **vpp = ap->a_vpp; 138 register struct inode *ip; 139 int error; 140 141 if ((error = ext2fs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), 142 ap->a_dvp, vpp, ap->a_cnp)) != 0) 143 return (error); 144 ip = VTOI(*vpp); 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 *vpp = 0; 162 return (0); 163 } 164 165 /* 166 * Open called. 167 * 168 * Just check the APPEND flag. 169 */ 170 /* ARGSUSED */ 171 int 172 ext2fs_open(v) 173 void *v; 174 { 175 struct vop_open_args /* { 176 struct vnode *a_vp; 177 int a_mode; 178 struct ucred *a_cred; 179 struct proc *a_p; 180 } */ *ap = v; 181 182 /* 183 * Files marked append-only must be opened for appending. 184 */ 185 if ((VTOI(ap->a_vp)->i_e2fs_flags & EXT2_APPEND) && 186 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 187 return (EPERM); 188 return (0); 189 } 190 191 int 192 ext2fs_access(v) 193 void *v; 194 { 195 struct vop_access_args /* { 196 struct vnode *a_vp; 197 int a_mode; 198 struct ucred *a_cred; 199 struct proc *a_p; 200 } */ *ap = v; 201 struct vnode *vp = ap->a_vp; 202 struct inode *ip = VTOI(vp); 203 mode_t mode = ap->a_mode; 204 205 206 /* 207 * Disallow write attempts on read-only file systems; 208 * unless the file is a socket, fifo, or a block or 209 * character device resident on the file system. 210 */ 211 if (mode & VWRITE) { 212 switch (vp->v_type) { 213 case VDIR: 214 case VLNK: 215 case VREG: 216 if (vp->v_mount->mnt_flag & MNT_RDONLY) 217 return (EROFS); 218 break; 219 default: 220 break; 221 } 222 } 223 224 /* If immutable bit set, nobody gets to write it. */ 225 if ((mode & VWRITE) && (ip->i_e2fs_flags & EXT2_IMMUTABLE)) 226 return (EPERM); 227 228 return (vaccess(vp->v_type, ip->i_e2fs_mode & ALLPERMS, 229 ip->i_e2fs_uid, ip->i_e2fs_gid, mode, ap->a_cred)); 230 } 231 232 /* ARGSUSED */ 233 int 234 ext2fs_getattr(v) 235 void *v; 236 { 237 struct vop_getattr_args /* { 238 struct vnode *a_vp; 239 struct vattr *a_vap; 240 struct ucred *a_cred; 241 struct proc *a_p; 242 } */ *ap = v; 243 register struct vnode *vp = ap->a_vp; 244 register struct inode *ip = VTOI(vp); 245 register struct vattr *vap = ap->a_vap; 246 struct timespec ts; 247 248 TIMEVAL_TO_TIMESPEC(&time, &ts); 249 EXT2FS_ITIMES(ip, &ts, &ts, &ts); 250 /* 251 * Copy from inode table 252 */ 253 vap->va_fsid = ip->i_dev; 254 vap->va_fileid = ip->i_number; 255 vap->va_mode = ip->i_e2fs_mode & ALLPERMS; 256 vap->va_nlink = ip->i_e2fs_nlink; 257 vap->va_uid = ip->i_e2fs_uid; 258 vap->va_gid = ip->i_e2fs_gid; 259 vap->va_rdev = (dev_t)fs2h32(ip->i_din.e2fs_din.e2di_rdev); 260 vap->va_size = ip->i_e2fs_size; 261 vap->va_atime.tv_sec = ip->i_e2fs_atime; 262 vap->va_atime.tv_nsec = 0; 263 vap->va_mtime.tv_sec = ip->i_e2fs_mtime; 264 vap->va_mtime.tv_nsec = 0; 265 vap->va_ctime.tv_sec = ip->i_e2fs_ctime; 266 vap->va_ctime.tv_nsec = 0; 267 #ifdef EXT2FS_SYSTEM_FLAGS 268 vap->va_flags = (ip->i_e2fs_flags & EXT2_APPEND) ? SF_APPEND : 0; 269 vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0; 270 #else 271 vap->va_flags = (ip->i_e2fs_flags & EXT2_APPEND) ? UF_APPEND : 0; 272 vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? UF_IMMUTABLE : 0; 273 #endif 274 vap->va_gen = ip->i_e2fs_gen; 275 /* this doesn't belong here */ 276 if (vp->v_type == VBLK) 277 vap->va_blocksize = BLKDEV_IOSIZE; 278 else if (vp->v_type == VCHR) 279 vap->va_blocksize = MAXBSIZE; 280 else 281 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; 282 vap->va_bytes = dbtob((u_quad_t)ip->i_e2fs_nblock); 283 vap->va_type = vp->v_type; 284 vap->va_filerev = ip->i_modrev; 285 return (0); 286 } 287 288 /* 289 * Set attribute vnode op. called from several syscalls 290 */ 291 int 292 ext2fs_setattr(v) 293 void *v; 294 { 295 struct vop_setattr_args /* { 296 struct vnode *a_vp; 297 struct vattr *a_vap; 298 struct ucred *a_cred; 299 struct proc *a_p; 300 } */ *ap = v; 301 struct vattr *vap = ap->a_vap; 302 struct vnode *vp = ap->a_vp; 303 struct inode *ip = VTOI(vp); 304 struct ucred *cred = ap->a_cred; 305 struct proc *p = ap->a_p; 306 int error; 307 308 /* 309 * Check for unsettable attributes. 310 */ 311 if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) || 312 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 313 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 314 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 315 return (EINVAL); 316 } 317 if (vap->va_flags != VNOVAL) { 318 if (vp->v_mount->mnt_flag & MNT_RDONLY) 319 return (EROFS); 320 if (cred->cr_uid != ip->i_e2fs_uid && 321 (error = suser(cred, &p->p_acflag))) 322 return (error); 323 #ifdef EXT2FS_SYSTEM_FLAGS 324 if (cred->cr_uid == 0) { 325 if ((ip->i_e2fs_flags & (EXT2_APPEND | EXT2_IMMUTABLE)) && 326 securelevel > 0) 327 return (EPERM); 328 ip->i_e2fs_flags &= ~(EXT2_APPEND | EXT2_IMMUTABLE); 329 ip->i_e2fs_flags |= (vap->va_flags & SF_APPEND) ? EXT2_APPEND : 0 | 330 (vap->va_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE: 0; 331 } else { 332 return (EPERM); 333 } 334 #else 335 ip->i_e2fs_flags &= ~(EXT2_APPEND | EXT2_IMMUTABLE); 336 ip->i_e2fs_flags |= (vap->va_flags & UF_APPEND) ? EXT2_APPEND : 0 | 337 (vap->va_flags & UF_IMMUTABLE) ? EXT2_IMMUTABLE: 0; 338 #endif 339 ip->i_flag |= IN_CHANGE; 340 if (vap->va_flags & (IMMUTABLE | APPEND)) 341 return (0); 342 } 343 if (ip->i_e2fs_flags & (EXT2_APPEND | EXT2_IMMUTABLE)) 344 return (EPERM); 345 /* 346 * Go through the fields and update iff not VNOVAL. 347 */ 348 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 349 if (vp->v_mount->mnt_flag & MNT_RDONLY) 350 return (EROFS); 351 error = ext2fs_chown(vp, vap->va_uid, vap->va_gid, cred, p); 352 if (error) 353 return (error); 354 } 355 if (vap->va_size != VNOVAL) { 356 /* 357 * Disallow write attempts on read-only file systems; 358 * unless the file is a socket, fifo, or a block or 359 * character device resident on the file system. 360 */ 361 switch (vp->v_type) { 362 case VDIR: 363 return (EISDIR); 364 case VLNK: 365 case VREG: 366 if (vp->v_mount->mnt_flag & MNT_RDONLY) 367 return (EROFS); 368 default: 369 break; 370 } 371 error = VOP_TRUNCATE(vp, vap->va_size, 0, cred, p); 372 if (error) 373 return (error); 374 } 375 ip = VTOI(vp); 376 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 377 if (vp->v_mount->mnt_flag & MNT_RDONLY) 378 return (EROFS); 379 if (cred->cr_uid != ip->i_e2fs_uid && 380 (error = suser(cred, &p->p_acflag)) && 381 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 382 (error = VOP_ACCESS(vp, VWRITE, cred, p)))) 383 return (error); 384 if (vap->va_atime.tv_sec != VNOVAL) 385 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 386 ip->i_flag |= IN_ACCESS; 387 if (vap->va_mtime.tv_sec != VNOVAL) 388 ip->i_flag |= IN_CHANGE | IN_UPDATE; 389 error = VOP_UPDATE(vp, &vap->va_atime, &vap->va_mtime, 1); 390 if (error) 391 return (error); 392 } 393 error = 0; 394 if (vap->va_mode != (mode_t)VNOVAL) { 395 if (vp->v_mount->mnt_flag & MNT_RDONLY) 396 return (EROFS); 397 error = ext2fs_chmod(vp, (int)vap->va_mode, cred, p); 398 } 399 return (error); 400 } 401 402 /* 403 * Change the mode on a file. 404 * Inode must be locked before calling. 405 */ 406 static int 407 ext2fs_chmod(vp, mode, cred, p) 408 register struct vnode *vp; 409 register int mode; 410 register struct ucred *cred; 411 struct proc *p; 412 { 413 register struct inode *ip = VTOI(vp); 414 int error; 415 416 if (cred->cr_uid != ip->i_e2fs_uid && 417 (error = suser(cred, &p->p_acflag))) 418 return (error); 419 if (cred->cr_uid) { 420 if (vp->v_type != VDIR && (mode & S_ISTXT)) 421 return (EFTYPE); 422 if (!groupmember(ip->i_e2fs_gid, cred) && (mode & ISGID)) 423 return (EPERM); 424 } 425 ip->i_e2fs_mode &= ~ALLPERMS; 426 ip->i_e2fs_mode |= (mode & ALLPERMS); 427 ip->i_flag |= IN_CHANGE; 428 if ((vp->v_flag & VTEXT) && (ip->i_e2fs_mode & S_ISTXT) == 0) 429 #if defined(UVM) 430 (void) uvm_vnp_uncache(vp); 431 #else 432 (void) vnode_pager_uncache(vp); 433 #endif 434 return (0); 435 } 436 437 /* 438 * Perform chown operation on inode ip; 439 * inode must be locked prior to call. 440 */ 441 static int 442 ext2fs_chown(vp, uid, gid, cred, p) 443 register struct vnode *vp; 444 uid_t uid; 445 gid_t gid; 446 struct ucred *cred; 447 struct proc *p; 448 { 449 register struct inode *ip = VTOI(vp); 450 uid_t ouid; 451 gid_t ogid; 452 int error = 0; 453 454 if (uid == (uid_t)VNOVAL) 455 uid = ip->i_e2fs_uid; 456 if (gid == (gid_t)VNOVAL) 457 gid = ip->i_e2fs_gid; 458 /* 459 * If we don't own the file, are trying to change the owner 460 * of the file, or are not a member of the target group, 461 * the caller must be superuser or the call fails. 462 */ 463 if ((cred->cr_uid != ip->i_e2fs_uid || uid != ip->i_e2fs_uid || 464 (gid != ip->i_e2fs_gid && !groupmember((gid_t)gid, cred))) && 465 (error = suser(cred, &p->p_acflag))) 466 return (error); 467 ogid = ip->i_e2fs_gid; 468 ouid = ip->i_e2fs_uid; 469 470 ip->i_e2fs_gid = gid; 471 ip->i_e2fs_uid = uid; 472 if (ouid != uid || ogid != gid) 473 ip->i_flag |= IN_CHANGE; 474 if (ouid != uid && cred->cr_uid != 0) 475 ip->i_e2fs_mode &= ~ISUID; 476 if (ogid != gid && cred->cr_uid != 0) 477 ip->i_e2fs_mode &= ~ISGID; 478 return (0); 479 } 480 481 int 482 ext2fs_remove(v) 483 void *v; 484 { 485 struct vop_remove_args /* { 486 struct vnode *a_dvp; 487 struct vnode *a_vp; 488 struct componentname *a_cnp; 489 } */ *ap = v; 490 struct inode *ip; 491 struct vnode *vp = ap->a_vp; 492 struct vnode *dvp = ap->a_dvp; 493 int error; 494 495 ip = VTOI(vp); 496 if (vp->v_type == VDIR || 497 (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 498 (VTOI(dvp)->i_e2fs_flags & EXT2_APPEND)) { 499 error = EPERM; 500 goto out; 501 } 502 error = ext2fs_dirremove(dvp, ap->a_cnp); 503 if (error == 0) { 504 ip->i_e2fs_nlink--; 505 ip->i_flag |= IN_CHANGE; 506 } 507 out: 508 if (dvp == vp) 509 vrele(vp); 510 else 511 vput(vp); 512 vput(dvp); 513 return (error); 514 } 515 516 /* 517 * link vnode call 518 */ 519 int 520 ext2fs_link(v) 521 void *v; 522 { 523 struct vop_link_args /* { 524 struct vnode *a_dvp; 525 struct vnode *a_vp; 526 struct componentname *a_cnp; 527 } */ *ap = v; 528 struct vnode *dvp = ap->a_dvp; 529 struct vnode *vp = ap->a_vp; 530 struct componentname *cnp = ap->a_cnp; 531 struct inode *ip; 532 struct timespec ts; 533 int error; 534 535 #ifdef DIAGNOSTIC 536 if ((cnp->cn_flags & HASBUF) == 0) 537 panic("ext2fs_link: no name"); 538 #endif 539 if (vp->v_type == VDIR) { 540 VOP_ABORTOP(dvp, cnp); 541 error = EISDIR; 542 goto out2; 543 } 544 if (dvp->v_mount != vp->v_mount) { 545 VOP_ABORTOP(dvp, cnp); 546 error = EXDEV; 547 goto out2; 548 } 549 if (dvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE))) { 550 VOP_ABORTOP(dvp, cnp); 551 goto out2; 552 } 553 ip = VTOI(vp); 554 if ((nlink_t)ip->i_e2fs_nlink >= LINK_MAX) { 555 VOP_ABORTOP(dvp, cnp); 556 error = EMLINK; 557 goto out1; 558 } 559 if (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) { 560 VOP_ABORTOP(dvp, cnp); 561 error = EPERM; 562 goto out1; 563 } 564 ip->i_e2fs_nlink++; 565 ip->i_flag |= IN_CHANGE; 566 TIMEVAL_TO_TIMESPEC(&time, &ts); 567 error = VOP_UPDATE(vp, &ts, &ts, 1); 568 if (!error) 569 error = ext2fs_direnter(ip, dvp, cnp); 570 if (error) { 571 ip->i_e2fs_nlink--; 572 ip->i_flag |= IN_CHANGE; 573 } 574 FREE(cnp->cn_pnbuf, M_NAMEI); 575 out1: 576 if (dvp != vp) 577 VOP_UNLOCK(vp, 0); 578 out2: 579 vput(dvp); 580 return (error); 581 } 582 583 /* 584 * Rename system call. 585 * rename("foo", "bar"); 586 * is essentially 587 * unlink("bar"); 588 * link("foo", "bar"); 589 * unlink("foo"); 590 * but ``atomically''. Can't do full commit without saving state in the 591 * inode on disk which isn't feasible at this time. Best we can do is 592 * always guarantee the target exists. 593 * 594 * Basic algorithm is: 595 * 596 * 1) Bump link count on source while we're linking it to the 597 * target. This also ensure the inode won't be deleted out 598 * from underneath us while we work (it may be truncated by 599 * a concurrent `trunc' or `open' for creation). 600 * 2) Link source to destination. If destination already exists, 601 * delete it first. 602 * 3) Unlink source reference to inode if still around. If a 603 * directory was moved and the parent of the destination 604 * is different from the source, patch the ".." entry in the 605 * directory. 606 */ 607 int 608 ext2fs_rename(v) 609 void *v; 610 { 611 struct vop_rename_args /* { 612 struct vnode *a_fdvp; 613 struct vnode *a_fvp; 614 struct componentname *a_fcnp; 615 struct vnode *a_tdvp; 616 struct vnode *a_tvp; 617 struct componentname *a_tcnp; 618 } */ *ap = v; 619 struct vnode *tvp = ap->a_tvp; 620 register struct vnode *tdvp = ap->a_tdvp; 621 struct vnode *fvp = ap->a_fvp; 622 struct vnode *fdvp = ap->a_fdvp; 623 struct componentname *tcnp = ap->a_tcnp; 624 struct componentname *fcnp = ap->a_fcnp; 625 struct inode *ip, *xp, *dp; 626 struct ext2fs_dirtemplate dirbuf; 627 struct timespec ts; 628 int doingdirectory = 0, oldparent = 0, newparent = 0; 629 int error = 0; 630 u_char namlen; 631 632 #ifdef DIAGNOSTIC 633 if ((tcnp->cn_flags & HASBUF) == 0 || 634 (fcnp->cn_flags & HASBUF) == 0) 635 panic("ext2fs_rename: no name"); 636 #endif 637 /* 638 * Check for cross-device rename. 639 */ 640 if ((fvp->v_mount != tdvp->v_mount) || 641 (tvp && (fvp->v_mount != tvp->v_mount))) { 642 error = EXDEV; 643 abortit: 644 VOP_ABORTOP(tdvp, tcnp); /* XXX, why not in NFS? */ 645 if (tdvp == tvp) 646 vrele(tdvp); 647 else 648 vput(tdvp); 649 if (tvp) 650 vput(tvp); 651 VOP_ABORTOP(fdvp, fcnp); /* XXX, why not in NFS? */ 652 vrele(fdvp); 653 vrele(fvp); 654 return (error); 655 } 656 657 /* 658 * Check if just deleting a link name. 659 */ 660 if (tvp && ((VTOI(tvp)->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 661 (VTOI(tdvp)->i_e2fs_flags & EXT2_APPEND))) { 662 error = EPERM; 663 goto abortit; 664 } 665 if (fvp == tvp) { 666 if (fvp->v_type == VDIR) { 667 error = EINVAL; 668 goto abortit; 669 } 670 671 /* Release destination completely. */ 672 VOP_ABORTOP(tdvp, tcnp); 673 vput(tdvp); 674 vput(tvp); 675 676 /* Delete source. */ 677 vrele(fdvp); 678 vrele(fvp); 679 fcnp->cn_flags &= ~MODMASK; 680 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 681 if ((fcnp->cn_flags & SAVESTART) == 0) 682 panic("ext2fs_rename: lost from startdir"); 683 fcnp->cn_nameiop = DELETE; 684 (void) relookup(fdvp, &fvp, fcnp); 685 return (VOP_REMOVE(fdvp, fvp, fcnp)); 686 } 687 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 688 goto abortit; 689 dp = VTOI(fdvp); 690 ip = VTOI(fvp); 691 if ((ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 692 (dp->i_e2fs_flags & EXT2_APPEND)) { 693 VOP_UNLOCK(fvp, 0); 694 error = EPERM; 695 goto abortit; 696 } 697 if ((ip->i_e2fs_mode & IFMT) == IFDIR) { 698 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 699 if (!error && tvp) 700 error = VOP_ACCESS(tvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 701 if (error) { 702 VOP_UNLOCK(fvp, 0); 703 error = EACCES; 704 goto abortit; 705 } 706 /* 707 * Avoid ".", "..", and aliases of "." for obvious reasons. 708 */ 709 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 710 dp == ip || 711 (fcnp->cn_flags&ISDOTDOT) || 712 (tcnp->cn_flags & ISDOTDOT) || 713 (ip->i_flag & IN_RENAME)) { 714 VOP_UNLOCK(fvp, 0); 715 error = EINVAL; 716 goto abortit; 717 } 718 ip->i_flag |= IN_RENAME; 719 oldparent = dp->i_number; 720 doingdirectory++; 721 } 722 vrele(fdvp); 723 724 /* 725 * When the target exists, both the directory 726 * and target vnodes are returned locked. 727 */ 728 dp = VTOI(tdvp); 729 xp = NULL; 730 if (tvp) 731 xp = VTOI(tvp); 732 733 /* 734 * 1) Bump link count while we're moving stuff 735 * around. If we crash somewhere before 736 * completing our work, the link count 737 * may be wrong, but correctable. 738 */ 739 ip->i_e2fs_nlink++; 740 ip->i_flag |= IN_CHANGE; 741 TIMEVAL_TO_TIMESPEC(&time, &ts); 742 if ((error = VOP_UPDATE(fvp, &ts, &ts, 1)) != 0) { 743 VOP_UNLOCK(fvp, 0); 744 goto bad; 745 } 746 747 /* 748 * If ".." must be changed (ie the directory gets a new 749 * parent) then the source directory must not be in the 750 * directory heirarchy above the target, as this would 751 * orphan everything below the source directory. Also 752 * the user must have write permission in the source so 753 * as to be able to change "..". We must repeat the call 754 * to namei, as the parent directory is unlocked by the 755 * call to checkpath(). 756 */ 757 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 758 VOP_UNLOCK(fvp, 0); 759 if (oldparent != dp->i_number) 760 newparent = dp->i_number; 761 if (doingdirectory && newparent) { 762 if (error) /* write access check above */ 763 goto bad; 764 if (xp != NULL) 765 vput(tvp); 766 error = ext2fs_checkpath(ip, dp, tcnp->cn_cred); 767 if (error != 0) 768 goto out; 769 if ((tcnp->cn_flags & SAVESTART) == 0) 770 panic("ext2fs_rename: lost to startdir"); 771 if ((error = relookup(tdvp, &tvp, tcnp)) != 0) 772 goto out; 773 dp = VTOI(tdvp); 774 xp = NULL; 775 if (tvp) 776 xp = VTOI(tvp); 777 } 778 /* 779 * 2) If target doesn't exist, link the target 780 * to the source and unlink the source. 781 * Otherwise, rewrite the target directory 782 * entry to reference the source inode and 783 * expunge the original entry's existence. 784 */ 785 if (xp == NULL) { 786 if (dp->i_dev != ip->i_dev) 787 panic("rename: EXDEV"); 788 /* 789 * Account for ".." in new directory. 790 * When source and destination have the same 791 * parent we don't fool with the link count. 792 */ 793 if (doingdirectory && newparent) { 794 if ((nlink_t)dp->i_e2fs_nlink >= LINK_MAX) { 795 error = EMLINK; 796 goto bad; 797 } 798 dp->i_e2fs_nlink++; 799 dp->i_flag |= IN_CHANGE; 800 if ((error = VOP_UPDATE(tdvp, &ts, &ts, 1)) != 0) 801 goto bad; 802 } 803 error = ext2fs_direnter(ip, tdvp, tcnp); 804 if (error != 0) { 805 if (doingdirectory && newparent) { 806 dp->i_e2fs_nlink--; 807 dp->i_flag |= IN_CHANGE; 808 (void)VOP_UPDATE(tdvp, &ts, &ts, 1); 809 } 810 goto bad; 811 } 812 vput(tdvp); 813 } else { 814 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) 815 panic("rename: EXDEV"); 816 /* 817 * Short circuit rename(foo, foo). 818 */ 819 if (xp->i_number == ip->i_number) 820 panic("rename: same file"); 821 /* 822 * If the parent directory is "sticky", then the user must 823 * own the parent directory, or the destination of the rename, 824 * otherwise the destination may not be changed (except by 825 * root). This implements append-only directories. 826 */ 827 if ((dp->i_e2fs_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 && 828 tcnp->cn_cred->cr_uid != dp->i_e2fs_uid && 829 xp->i_e2fs_uid != tcnp->cn_cred->cr_uid) { 830 error = EPERM; 831 goto bad; 832 } 833 /* 834 * Target must be empty if a directory and have no links 835 * to it. Also, ensure source and target are compatible 836 * (both directories, or both not directories). 837 */ 838 if ((xp->i_e2fs_mode & IFMT) == IFDIR) { 839 if (!ext2fs_dirempty(xp, dp->i_number, tcnp->cn_cred) || 840 xp->i_e2fs_nlink > 2) { 841 error = ENOTEMPTY; 842 goto bad; 843 } 844 if (!doingdirectory) { 845 error = ENOTDIR; 846 goto bad; 847 } 848 cache_purge(tdvp); 849 } else if (doingdirectory) { 850 error = EISDIR; 851 goto bad; 852 } 853 error = ext2fs_dirrewrite(dp, ip, tcnp); 854 if (error != 0) 855 goto bad; 856 /* 857 * If the target directory is in the same 858 * directory as the source directory, 859 * decrement the link count on the parent 860 * of the target directory. 861 */ 862 if (doingdirectory && !newparent) { 863 dp->i_e2fs_nlink--; 864 dp->i_flag |= IN_CHANGE; 865 } 866 vput(tdvp); 867 /* 868 * Adjust the link count of the target to 869 * reflect the dirrewrite above. If this is 870 * a directory it is empty and there are 871 * no links to it, so we can squash the inode and 872 * any space associated with it. We disallowed 873 * renaming over top of a directory with links to 874 * it above, as the remaining link would point to 875 * a directory without "." or ".." entries. 876 */ 877 xp->i_e2fs_nlink--; 878 if (doingdirectory) { 879 if (--xp->i_e2fs_nlink != 0) 880 panic("rename: linked directory"); 881 error = VOP_TRUNCATE(tvp, (off_t)0, IO_SYNC, 882 tcnp->cn_cred, tcnp->cn_proc); 883 } 884 xp->i_flag |= IN_CHANGE; 885 vput(tvp); 886 xp = NULL; 887 } 888 889 /* 890 * 3) Unlink the source. 891 */ 892 fcnp->cn_flags &= ~MODMASK; 893 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 894 if ((fcnp->cn_flags & SAVESTART) == 0) 895 panic("ext2fs_rename: lost from startdir"); 896 (void) relookup(fdvp, &fvp, fcnp); 897 if (fvp != NULL) { 898 xp = VTOI(fvp); 899 dp = VTOI(fdvp); 900 } else { 901 /* 902 * From name has disappeared. 903 */ 904 if (doingdirectory) 905 panic("ext2fs_rename: lost dir entry"); 906 vrele(ap->a_fvp); 907 return (0); 908 } 909 /* 910 * Ensure that the directory entry still exists and has not 911 * changed while the new name has been entered. If the source is 912 * a file then the entry may have been unlinked or renamed. In 913 * either case there is no further work to be done. If the source 914 * is a directory then it cannot have been rmdir'ed; its link 915 * count of three would cause a rmdir to fail with ENOTEMPTY. 916 * The IRENAME flag ensures that it cannot be moved by another 917 * rename. 918 */ 919 if (xp != ip) { 920 if (doingdirectory) 921 panic("ext2fs_rename: lost dir entry"); 922 } else { 923 /* 924 * If the source is a directory with a 925 * new parent, the link count of the old 926 * parent directory must be decremented 927 * and ".." set to point to the new parent. 928 */ 929 if (doingdirectory && newparent) { 930 dp->i_e2fs_nlink--; 931 dp->i_flag |= IN_CHANGE; 932 error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf, 933 sizeof (struct ext2fs_dirtemplate), (off_t)0, 934 UIO_SYSSPACE, IO_NODELOCKED, 935 tcnp->cn_cred, (size_t *)0, (struct proc *)0); 936 if (error == 0) { 937 namlen = fs2h16(dirbuf.dotdot_namlen); 938 if (namlen != 2 || 939 dirbuf.dotdot_name[0] != '.' || 940 dirbuf.dotdot_name[1] != '.') { 941 ufs_dirbad(xp, (doff_t)12, 942 "ext2fs_rename: mangled dir"); 943 } else { 944 dirbuf.dotdot_ino = h2fs32(newparent); 945 (void) vn_rdwr(UIO_WRITE, fvp, 946 (caddr_t)&dirbuf, 947 sizeof (struct dirtemplate), 948 (off_t)0, UIO_SYSSPACE, 949 IO_NODELOCKED|IO_SYNC, 950 tcnp->cn_cred, (size_t *)0, 951 (struct proc *)0); 952 cache_purge(fdvp); 953 } 954 } 955 } 956 error = ext2fs_dirremove(fdvp, fcnp); 957 if (!error) { 958 xp->i_e2fs_nlink--; 959 xp->i_flag |= IN_CHANGE; 960 } 961 xp->i_flag &= ~IN_RENAME; 962 } 963 if (dp) 964 vput(fdvp); 965 if (xp) 966 vput(fvp); 967 vrele(ap->a_fvp); 968 return (error); 969 970 bad: 971 if (xp) 972 vput(ITOV(xp)); 973 vput(ITOV(dp)); 974 out: 975 if (doingdirectory) 976 ip->i_flag &= ~IN_RENAME; 977 if (vn_lock(fvp, LK_EXCLUSIVE) == 0) { 978 ip->i_e2fs_nlink--; 979 ip->i_flag |= IN_CHANGE; 980 vput(fvp); 981 } else 982 vrele(fvp); 983 return (error); 984 } 985 986 /* 987 * Mkdir system call 988 */ 989 int 990 ext2fs_mkdir(v) 991 void *v; 992 { 993 struct vop_mkdir_args /* { 994 struct vnode *a_dvp; 995 struct vnode **a_vpp; 996 struct componentname *a_cnp; 997 struct vattr *a_vap; 998 } */ *ap = v; 999 register struct vnode *dvp = ap->a_dvp; 1000 register struct vattr *vap = ap->a_vap; 1001 register struct componentname *cnp = ap->a_cnp; 1002 register struct inode *ip, *dp; 1003 struct vnode *tvp; 1004 struct ext2fs_dirtemplate dirtemplate; 1005 struct timespec ts; 1006 int error, dmode; 1007 1008 #ifdef DIAGNOSTIC 1009 if ((cnp->cn_flags & HASBUF) == 0) 1010 panic("ext2fs_mkdir: no name"); 1011 #endif 1012 dp = VTOI(dvp); 1013 if ((nlink_t)dp->i_e2fs_nlink >= LINK_MAX) { 1014 error = EMLINK; 1015 goto out; 1016 } 1017 dmode = vap->va_mode & ACCESSPERMS; 1018 dmode |= IFDIR; 1019 /* 1020 * Must simulate part of ext2fs_makeinode here to acquire the inode, 1021 * but not have it entered in the parent directory. The entry is 1022 * made later after writing "." and ".." entries. 1023 */ 1024 if ((error = VOP_VALLOC(dvp, dmode, cnp->cn_cred, &tvp)) != 0) 1025 goto out; 1026 ip = VTOI(tvp); 1027 ip->i_e2fs_uid = cnp->cn_cred->cr_uid; 1028 ip->i_e2fs_gid = dp->i_e2fs_gid; 1029 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1030 ip->i_e2fs_mode = dmode; 1031 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ 1032 ip->i_e2fs_nlink = 2; 1033 TIMEVAL_TO_TIMESPEC(&time, &ts); 1034 error = VOP_UPDATE(tvp, &ts, &ts, 1); 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, &ts, &ts, 1)) != 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 = h2fs16(1); 1052 dirtemplate.dot_name[0] = '.'; 1053 dirtemplate.dotdot_ino = h2fs32(dp->i_number); 1054 dirtemplate.dotdot_reclen = h2fs16(VTOI(dvp)->i_e2fs->e2fs_bsize - 12); 1055 dirtemplate.dotdot_namlen = h2fs16(2); 1056 dirtemplate.dotdot_name[0] = dirtemplate.dotdot_name[1] = '.'; 1057 error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate, 1058 sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, 1059 IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (size_t *)0, (struct proc *)0); 1060 if (error) { 1061 dp->i_e2fs_nlink--; 1062 dp->i_flag |= IN_CHANGE; 1063 goto bad; 1064 } 1065 if (VTOI(dvp)->i_e2fs->e2fs_bsize > 1066 VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_bsize) 1067 panic("ext2fs_mkdir: blksize"); /* XXX should grow with balloc() */ 1068 else { 1069 ip->i_e2fs_size = VTOI(dvp)->i_e2fs->e2fs_bsize; 1070 ip->i_flag |= IN_CHANGE; 1071 } 1072 1073 /* Directory set up, now install it's entry in the parent directory. */ 1074 error = ext2fs_direnter(ip, dvp, cnp); 1075 if (error != 0) { 1076 dp->i_e2fs_nlink--; 1077 dp->i_flag |= IN_CHANGE; 1078 } 1079 bad: 1080 /* 1081 * No need to do an explicit VOP_TRUNCATE here, vrele will do this 1082 * for us because we set the link count to 0. 1083 */ 1084 if (error) { 1085 ip->i_e2fs_nlink = 0; 1086 ip->i_flag |= IN_CHANGE; 1087 vput(tvp); 1088 } else 1089 *ap->a_vpp = tvp; 1090 out: 1091 FREE(cnp->cn_pnbuf, M_NAMEI); 1092 vput(dvp); 1093 return (error); 1094 } 1095 1096 /* 1097 * Rmdir system call. 1098 */ 1099 int 1100 ext2fs_rmdir(v) 1101 void *v; 1102 { 1103 struct vop_rmdir_args /* { 1104 struct vnode *a_dvp; 1105 struct vnode *a_vp; 1106 struct componentname *a_cnp; 1107 } */ *ap = v; 1108 register struct vnode *vp = ap->a_vp; 1109 register struct vnode *dvp = ap->a_dvp; 1110 register struct componentname *cnp = ap->a_cnp; 1111 register struct inode *ip, *dp; 1112 int error; 1113 1114 ip = VTOI(vp); 1115 dp = VTOI(dvp); 1116 /* 1117 * No rmdir "." please. 1118 */ 1119 if (dp == ip) { 1120 vrele(dvp); 1121 vput(vp); 1122 return (EINVAL); 1123 } 1124 /* 1125 * Verify the directory is empty (and valid). 1126 * (Rmdir ".." won't be valid since 1127 * ".." will contain a reference to 1128 * the current directory and thus be 1129 * non-empty.) 1130 */ 1131 error = 0; 1132 if (ip->i_e2fs_nlink != 2 || 1133 !ext2fs_dirempty(ip, dp->i_number, cnp->cn_cred)) { 1134 error = ENOTEMPTY; 1135 goto out; 1136 } 1137 if ((dp->i_e2fs_flags & EXT2_APPEND) || 1138 (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND))) { 1139 error = EPERM; 1140 goto out; 1141 } 1142 /* 1143 * Delete reference to directory before purging 1144 * inode. If we crash in between, the directory 1145 * will be reattached to lost+found, 1146 */ 1147 error = ext2fs_dirremove(dvp, cnp); 1148 if (error != 0) 1149 goto out; 1150 dp->i_e2fs_nlink--; 1151 dp->i_flag |= IN_CHANGE; 1152 cache_purge(dvp); 1153 vput(dvp); 1154 dvp = NULL; 1155 /* 1156 * Truncate inode. The only stuff left 1157 * in the directory is "." and "..". The 1158 * "." reference is inconsequential since 1159 * we're quashing it. The ".." reference 1160 * has already been adjusted above. We've 1161 * removed the "." reference and the reference 1162 * in the parent directory, but there may be 1163 * other hard links so decrement by 2 and 1164 * worry about them later. 1165 */ 1166 ip->i_e2fs_nlink -= 2; 1167 error = VOP_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred, 1168 cnp->cn_proc); 1169 cache_purge(ITOV(ip)); 1170 out: 1171 if (dvp) 1172 vput(dvp); 1173 vput(vp); 1174 return (error); 1175 } 1176 1177 /* 1178 * symlink -- make a symbolic link 1179 */ 1180 int 1181 ext2fs_symlink(v) 1182 void *v; 1183 { 1184 struct vop_symlink_args /* { 1185 struct vnode *a_dvp; 1186 struct vnode **a_vpp; 1187 struct componentname *a_cnp; 1188 struct vattr *a_vap; 1189 char *a_target; 1190 } */ *ap = v; 1191 register struct vnode *vp, **vpp = ap->a_vpp; 1192 register struct inode *ip; 1193 int len, error; 1194 1195 error = ext2fs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, 1196 vpp, ap->a_cnp); 1197 if (error) 1198 return (error); 1199 vp = *vpp; 1200 len = strlen(ap->a_target); 1201 if (len < vp->v_mount->mnt_maxsymlinklen) { 1202 ip = VTOI(vp); 1203 memcpy((char *)ip->i_din.e2fs_din.e2di_shortlink, ap->a_target, len); 1204 ip->i_e2fs_size = len; 1205 ip->i_flag |= IN_CHANGE | IN_UPDATE; 1206 } else 1207 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, 1208 UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, 1209 (size_t *)0, (struct proc *)0); 1210 vput(vp); 1211 return (error); 1212 } 1213 1214 /* 1215 * Return target name of a symbolic link 1216 */ 1217 int 1218 ext2fs_readlink(v) 1219 void *v; 1220 { 1221 struct vop_readlink_args /* { 1222 struct vnode *a_vp; 1223 struct uio *a_uio; 1224 struct ucred *a_cred; 1225 } */ *ap = v; 1226 register struct vnode *vp = ap->a_vp; 1227 register struct inode *ip = VTOI(vp); 1228 int isize; 1229 1230 isize = ip->i_e2fs_size; 1231 if (isize < vp->v_mount->mnt_maxsymlinklen || 1232 (vp->v_mount->mnt_maxsymlinklen == 0 && ip->i_e2fs_nblock == 0)) { 1233 uiomove((char *)ip->i_din.e2fs_din.e2di_shortlink, isize, ap->a_uio); 1234 return (0); 1235 } 1236 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); 1237 } 1238 1239 /* 1240 * Advisory record locking support 1241 */ 1242 int 1243 ext2fs_advlock(v) 1244 void *v; 1245 { 1246 struct vop_advlock_args /* { 1247 struct vnode *a_vp; 1248 caddr_t a_id; 1249 int a_op; 1250 struct flock *a_fl; 1251 int a_flags; 1252 } */ *ap = v; 1253 register struct inode *ip = VTOI(ap->a_vp); 1254 1255 return (lf_advlock(&ip->i_lockf, ip->i_e2fs_size, ap->a_id, ap->a_op, 1256 ap->a_fl, ap->a_flags)); 1257 } 1258 1259 /* 1260 * Initialize the vnode associated with a new inode, handle aliased 1261 * vnodes. 1262 */ 1263 int 1264 ext2fs_vinit(mntp, specops, fifoops, vpp) 1265 struct mount *mntp; 1266 int (**specops) __P((void *)); 1267 int (**fifoops) __P((void *)); 1268 struct vnode **vpp; 1269 { 1270 struct inode *ip; 1271 struct vnode *vp, *nvp; 1272 1273 vp = *vpp; 1274 ip = VTOI(vp); 1275 switch(vp->v_type = IFTOVT(ip->i_e2fs_mode)) { 1276 case VCHR: 1277 case VBLK: 1278 vp->v_op = specops; 1279 if ((nvp = checkalias(vp, fs2h32(ip->i_din.e2fs_din.e2di_rdev), mntp)) 1280 != NULL) { 1281 /* 1282 * Discard unneeded vnode, but save its inode. 1283 * Note that the lock is carried over in the inode 1284 * to the replacement vnode. 1285 */ 1286 nvp->v_data = vp->v_data; 1287 vp->v_data = NULL; 1288 vp->v_op = spec_vnodeop_p; 1289 vrele(vp); 1290 vgone(vp); 1291 /* 1292 * Reinitialize aliased inode. 1293 */ 1294 vp = nvp; 1295 ip->i_vnode = vp; 1296 } 1297 break; 1298 case VFIFO: 1299 vp->v_op = fifoops; 1300 break; 1301 case VNON: 1302 case VBAD: 1303 case VSOCK: 1304 case VLNK: 1305 case VDIR: 1306 case VREG: 1307 break; 1308 } 1309 if (ip->i_number == ROOTINO) 1310 vp->v_flag |= VROOT; 1311 /* 1312 * Initialize modrev times 1313 */ 1314 SETHIGH(ip->i_modrev, mono_time.tv_sec); 1315 SETLOW(ip->i_modrev, mono_time.tv_usec * 4294); 1316 *vpp = vp; 1317 return (0); 1318 } 1319 1320 /* 1321 * Allocate a new inode. 1322 */ 1323 int 1324 ext2fs_makeinode(mode, dvp, vpp, cnp) 1325 int mode; 1326 struct vnode *dvp; 1327 struct vnode **vpp; 1328 struct componentname *cnp; 1329 { 1330 register struct inode *ip, *pdir; 1331 struct timespec ts; 1332 struct vnode *tvp; 1333 int error; 1334 1335 pdir = VTOI(dvp); 1336 #ifdef DIAGNOSTIC 1337 if ((cnp->cn_flags & HASBUF) == 0) 1338 panic("ext2fs_makeinode: no name"); 1339 #endif 1340 *vpp = NULL; 1341 if ((mode & IFMT) == 0) 1342 mode |= IFREG; 1343 1344 if ((error = VOP_VALLOC(dvp, mode, cnp->cn_cred, &tvp)) != 0) { 1345 free(cnp->cn_pnbuf, M_NAMEI); 1346 vput(dvp); 1347 return (error); 1348 } 1349 ip = VTOI(tvp); 1350 ip->i_e2fs_gid = pdir->i_e2fs_gid; 1351 ip->i_e2fs_uid = cnp->cn_cred->cr_uid; 1352 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1353 ip->i_e2fs_mode = mode; 1354 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ 1355 ip->i_e2fs_nlink = 1; 1356 if ((ip->i_e2fs_mode & ISGID) && 1357 !groupmember(ip->i_e2fs_gid, cnp->cn_cred) && 1358 suser(cnp->cn_cred, NULL)) 1359 ip->i_e2fs_mode &= ~ISGID; 1360 1361 /* 1362 * Make sure inode goes to disk before directory entry. 1363 */ 1364 TIMEVAL_TO_TIMESPEC(&time, &ts); 1365 if ((error = VOP_UPDATE(tvp, &ts, &ts, 1)) != 0) 1366 goto bad; 1367 error = ext2fs_direnter(ip, dvp, cnp); 1368 if (error != 0) 1369 goto bad; 1370 if ((cnp->cn_flags & SAVESTART) == 0) 1371 FREE(cnp->cn_pnbuf, M_NAMEI); 1372 vput(dvp); 1373 *vpp = tvp; 1374 return (0); 1375 1376 bad: 1377 /* 1378 * Write error occurred trying to update the inode 1379 * or the directory so must deallocate the inode. 1380 */ 1381 free(cnp->cn_pnbuf, M_NAMEI); 1382 vput(dvp); 1383 ip->i_e2fs_nlink = 0; 1384 ip->i_flag |= IN_CHANGE; 1385 vput(tvp); 1386 return (error); 1387 } 1388 1389 /* 1390 * Reclaim an inode so that it can be used for other purposes. 1391 */ 1392 int 1393 ext2fs_reclaim(v) 1394 void *v; 1395 { 1396 struct vop_reclaim_args /* { 1397 struct vnode *a_vp; 1398 } */ *ap = v; 1399 register struct vnode *vp = ap->a_vp; 1400 struct inode *ip; 1401 extern int prtactive; 1402 1403 if (prtactive && vp->v_usecount != 0) 1404 vprint("ext2fs_reclaim: pushing active", vp); 1405 /* 1406 * Remove the inode from its hash chain. 1407 */ 1408 ip = VTOI(vp); 1409 ufs_ihashrem(ip); 1410 /* 1411 * Purge old data structures associated with the inode. 1412 */ 1413 cache_purge(vp); 1414 if (ip->i_devvp) { 1415 vrele(ip->i_devvp); 1416 ip->i_devvp = 0; 1417 } 1418 1419 FREE(vp->v_data, M_EXT2FSNODE); 1420 vp->v_data = NULL; 1421 return (0); 1422 } 1423 1424 /* Global vfs data structures for ext2fs. */ 1425 int (**ext2fs_vnodeop_p) __P((void *)); 1426 struct vnodeopv_entry_desc ext2fs_vnodeop_entries[] = { 1427 { &vop_default_desc, vn_default_error }, 1428 { &vop_lookup_desc, ext2fs_lookup }, /* lookup */ 1429 { &vop_create_desc, ext2fs_create }, /* create */ 1430 { &vop_mknod_desc, ext2fs_mknod }, /* mknod */ 1431 { &vop_open_desc, ext2fs_open }, /* open */ 1432 { &vop_close_desc, ufs_close }, /* close */ 1433 { &vop_access_desc, ext2fs_access }, /* access */ 1434 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1435 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1436 { &vop_read_desc, ext2fs_read }, /* read */ 1437 { &vop_write_desc, ext2fs_write }, /* write */ 1438 { &vop_lease_desc, ufs_lease_check }, /* lease */ 1439 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 1440 { &vop_poll_desc, ufs_poll }, /* poll */ 1441 { &vop_revoke_desc, ufs_revoke }, /* revoke */ 1442 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 1443 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1444 { &vop_seek_desc, ufs_seek }, /* seek */ 1445 { &vop_remove_desc, ext2fs_remove }, /* remove */ 1446 { &vop_link_desc, ext2fs_link }, /* link */ 1447 { &vop_rename_desc, ext2fs_rename }, /* rename */ 1448 { &vop_mkdir_desc, ext2fs_mkdir }, /* mkdir */ 1449 { &vop_rmdir_desc, ext2fs_rmdir }, /* rmdir */ 1450 { &vop_symlink_desc, ext2fs_symlink }, /* symlink */ 1451 { &vop_readdir_desc, ext2fs_readdir }, /* readdir */ 1452 { &vop_readlink_desc, ext2fs_readlink }, /* readlink */ 1453 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 1454 { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ 1455 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1456 { &vop_lock_desc, ufs_lock }, /* lock */ 1457 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1458 { &vop_bmap_desc, ext2fs_bmap }, /* bmap */ 1459 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 1460 { &vop_print_desc, ufs_print }, /* print */ 1461 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1462 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 1463 { &vop_advlock_desc, ext2fs_advlock }, /* advlock */ 1464 { &vop_blkatoff_desc, ext2fs_blkatoff }, /* blkatoff */ 1465 { &vop_valloc_desc, ext2fs_valloc }, /* valloc */ 1466 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1467 { &vop_truncate_desc, ext2fs_truncate }, /* truncate */ 1468 { &vop_update_desc, ext2fs_update }, /* update */ 1469 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1470 { (struct vnodeop_desc*)NULL, (int(*) __P((void*)))NULL } 1471 }; 1472 struct vnodeopv_desc ext2fs_vnodeop_opv_desc = 1473 { &ext2fs_vnodeop_p, ext2fs_vnodeop_entries }; 1474 1475 int (**ext2fs_specop_p) __P((void *)); 1476 struct vnodeopv_entry_desc ext2fs_specop_entries[] = { 1477 { &vop_default_desc, vn_default_error }, 1478 { &vop_lookup_desc, spec_lookup }, /* lookup */ 1479 { &vop_create_desc, spec_create }, /* create */ 1480 { &vop_mknod_desc, spec_mknod }, /* mknod */ 1481 { &vop_open_desc, spec_open }, /* open */ 1482 { &vop_close_desc, ufsspec_close }, /* close */ 1483 { &vop_access_desc, ext2fs_access }, /* access */ 1484 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1485 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1486 { &vop_read_desc, ufsspec_read }, /* read */ 1487 { &vop_write_desc, ufsspec_write }, /* write */ 1488 { &vop_lease_desc, spec_lease_check }, /* lease */ 1489 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 1490 { &vop_poll_desc, spec_poll }, /* poll */ 1491 { &vop_revoke_desc, spec_revoke }, /* revoke */ 1492 { &vop_mmap_desc, spec_mmap }, /* mmap */ 1493 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1494 { &vop_seek_desc, spec_seek }, /* seek */ 1495 { &vop_remove_desc, spec_remove }, /* remove */ 1496 { &vop_link_desc, spec_link }, /* link */ 1497 { &vop_rename_desc, spec_rename }, /* rename */ 1498 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 1499 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 1500 { &vop_symlink_desc, spec_symlink }, /* symlink */ 1501 { &vop_readdir_desc, spec_readdir }, /* readdir */ 1502 { &vop_readlink_desc, spec_readlink }, /* readlink */ 1503 { &vop_abortop_desc, spec_abortop }, /* abortop */ 1504 { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ 1505 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1506 { &vop_lock_desc, ufs_lock }, /* lock */ 1507 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1508 { &vop_bmap_desc, spec_bmap }, /* bmap */ 1509 { &vop_strategy_desc, spec_strategy }, /* strategy */ 1510 { &vop_print_desc, ufs_print }, /* print */ 1511 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1512 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 1513 { &vop_advlock_desc, spec_advlock }, /* advlock */ 1514 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 1515 { &vop_valloc_desc, spec_valloc }, /* valloc */ 1516 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1517 { &vop_truncate_desc, spec_truncate }, /* truncate */ 1518 { &vop_update_desc, ext2fs_update }, /* update */ 1519 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1520 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 1521 }; 1522 struct vnodeopv_desc ext2fs_specop_opv_desc = 1523 { &ext2fs_specop_p, ext2fs_specop_entries }; 1524 1525 int (**ext2fs_fifoop_p) __P((void *)); 1526 struct vnodeopv_entry_desc ext2fs_fifoop_entries[] = { 1527 { &vop_default_desc, vn_default_error }, 1528 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 1529 { &vop_create_desc, fifo_create }, /* create */ 1530 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 1531 { &vop_open_desc, fifo_open }, /* open */ 1532 { &vop_close_desc, ufsfifo_close }, /* close */ 1533 { &vop_access_desc, ext2fs_access }, /* access */ 1534 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1535 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1536 { &vop_read_desc, ufsfifo_read }, /* read */ 1537 { &vop_write_desc, ufsfifo_write }, /* write */ 1538 { &vop_lease_desc, fifo_lease_check }, /* lease */ 1539 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 1540 { &vop_poll_desc, fifo_poll }, /* poll */ 1541 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 1542 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 1543 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1544 { &vop_seek_desc, fifo_seek }, /* seek */ 1545 { &vop_remove_desc, fifo_remove }, /* remove */ 1546 { &vop_link_desc, fifo_link }, /* link */ 1547 { &vop_rename_desc, fifo_rename }, /* rename */ 1548 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 1549 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 1550 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 1551 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 1552 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 1553 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 1554 { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ 1555 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1556 { &vop_lock_desc, ufs_lock }, /* lock */ 1557 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1558 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 1559 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 1560 { &vop_print_desc, ufs_print }, /* print */ 1561 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1562 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 1563 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 1564 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 1565 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 1566 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1567 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 1568 { &vop_update_desc, ext2fs_update }, /* update */ 1569 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1570 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 1571 }; 1572 struct vnodeopv_desc ext2fs_fifoop_opv_desc = 1573 { &ext2fs_fifoop_p, ext2fs_fifoop_entries }; 1574
Indexes created Fri Sep 26 08:10:20 GMT 2025