ext2fs_vnops.c revision 1.15
1 /* $NetBSD: ext2fs_vnops.c,v 1.15 1998/09/29 10:24:58 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Manuel Bouyer. 5 * Copyright (c) 1982, 1986, 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * (c) UNIX System Laboratories, Inc. 8 * All or some portions of this file are derived from material licensed 9 * to the University of California by American Telephone and Telegraph 10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 * the permission of UNIX System Laboratories, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)ufs_vnops.c 8.14 (Berkeley) 10/26/94 42 * Modified for ext2fs by Manuel Bouyer. 43 */ 44 45 #if defined(_KERNEL) && !defined(_LKM) 46 #include "opt_uvm.h" 47 #endif 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/resourcevar.h> 52 #include <sys/kernel.h> 53 #include <sys/file.h> 54 #include <sys/stat.h> 55 #include <sys/buf.h> 56 #include <sys/proc.h> 57 #include <sys/conf.h> 58 #include <sys/mount.h> 59 #include <sys/namei.h> 60 #include <sys/vnode.h> 61 #include <sys/lockf.h> 62 #include <sys/malloc.h> 63 #include <sys/pool.h> 64 #include <sys/signalvar.h> 65 66 #include <vm/vm.h> 67 #if defined(UVM) 68 #include <uvm/uvm_extern.h> 69 #endif 70 71 #include <miscfs/fifofs/fifo.h> 72 #include <miscfs/genfs/genfs.h> 73 #include <miscfs/specfs/specdev.h> 74 75 #include <ufs/ufs/quota.h> 76 #include <ufs/ufs/inode.h> 77 #include <ufs/ufs/ufs_extern.h> 78 #include <ufs/ufs/ufsmount.h> 79 80 #include <ufs/ext2fs/ext2fs.h> 81 #include <ufs/ext2fs/ext2fs_extern.h> 82 #include <ufs/ext2fs/ext2fs_dir.h> 83 84 85 static int ext2fs_chmod 86 __P((struct vnode *, int, struct ucred *, struct proc *)); 87 static int ext2fs_chown 88 __P((struct vnode *, uid_t, gid_t, struct ucred *, struct proc *)); 89 90 union _qcvt { 91 int64_t qcvt; 92 int32_t val[2]; 93 }; 94 #define SETHIGH(q, h) { \ 95 union _qcvt tmp; \ 96 tmp.qcvt = (q); \ 97 tmp.val[_QUAD_HIGHWORD] = (h); \ 98 (q) = tmp.qcvt; \ 99 } 100 #define SETLOW(q, l) { \ 101 union _qcvt tmp; \ 102 tmp.qcvt = (q); \ 103 tmp.val[_QUAD_LOWWORD] = (l); \ 104 (q) = tmp.qcvt; \ 105 } 106 107 /* 108 * Create a regular file 109 */ 110 int 111 ext2fs_create(v) 112 void *v; 113 { 114 struct vop_create_args /* { 115 struct vnode *a_dvp; 116 struct vnode **a_vpp; 117 struct componentname *a_cnp; 118 struct vattr *a_vap; 119 } */ *ap = v; 120 return ext2fs_makeinode(MAKEIMODE(ap->a_vap->va_type, 121 ap->a_vap->va_mode), 122 ap->a_dvp, ap->a_vpp, ap->a_cnp); 123 } 124 125 /* 126 * Mknod vnode call 127 */ 128 /* ARGSUSED */ 129 int 130 ext2fs_mknod(v) 131 void *v; 132 { 133 struct vop_mknod_args /* { 134 struct vnode *a_dvp; 135 struct vnode **a_vpp; 136 struct componentname *a_cnp; 137 struct vattr *a_vap; 138 } */ *ap = v; 139 register struct vattr *vap = ap->a_vap; 140 register struct vnode **vpp = ap->a_vpp; 141 register struct inode *ip; 142 int error; 143 144 if ((error = ext2fs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), 145 ap->a_dvp, vpp, ap->a_cnp)) != 0) 146 return (error); 147 ip = VTOI(*vpp); 148 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 149 if (vap->va_rdev != VNOVAL) { 150 /* 151 * Want to be able to use this to make badblock 152 * inodes, so don't truncate the dev number. 153 */ 154 ip->i_din.e2fs_din.e2di_rdev = h2fs32(vap->va_rdev); 155 } 156 /* 157 * Remove inode so that it will be reloaded by VFS_VGET and 158 * checked to see if it is an alias of an existing entry in 159 * the inode cache. 160 */ 161 vput(*vpp); 162 (*vpp)->v_type = VNON; 163 vgone(*vpp); 164 *vpp = 0; 165 return (0); 166 } 167 168 /* 169 * Open called. 170 * 171 * Just check the APPEND flag. 172 */ 173 /* ARGSUSED */ 174 int 175 ext2fs_open(v) 176 void *v; 177 { 178 struct vop_open_args /* { 179 struct vnode *a_vp; 180 int a_mode; 181 struct ucred *a_cred; 182 struct proc *a_p; 183 } */ *ap = v; 184 185 /* 186 * Files marked append-only must be opened for appending. 187 */ 188 if ((VTOI(ap->a_vp)->i_e2fs_flags & EXT2_APPEND) && 189 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 190 return (EPERM); 191 return (0); 192 } 193 194 int 195 ext2fs_access(v) 196 void *v; 197 { 198 struct vop_access_args /* { 199 struct vnode *a_vp; 200 int a_mode; 201 struct ucred *a_cred; 202 struct proc *a_p; 203 } */ *ap = v; 204 struct vnode *vp = ap->a_vp; 205 struct inode *ip = VTOI(vp); 206 mode_t mode = ap->a_mode; 207 208 209 /* 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 register struct vnode *vp = ap->a_vp; 247 register struct inode *ip = VTOI(vp); 248 register 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 = ip->i_e2fs_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 & (EXT2_APPEND | EXT2_IMMUTABLE)) && 329 securelevel > 0) 330 return (EPERM); 331 ip->i_e2fs_flags &= ~(EXT2_APPEND | EXT2_IMMUTABLE); 332 ip->i_e2fs_flags |= (vap->va_flags & SF_APPEND) ? EXT2_APPEND : 0 | 333 (vap->va_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE: 0; 334 } else { 335 return (EPERM); 336 } 337 #else 338 ip->i_e2fs_flags &= ~(EXT2_APPEND | EXT2_IMMUTABLE); 339 ip->i_e2fs_flags |= (vap->va_flags & UF_APPEND) ? EXT2_APPEND : 0 | 340 (vap->va_flags & UF_IMMUTABLE) ? EXT2_IMMUTABLE: 0; 341 #endif 342 ip->i_flag |= IN_CHANGE; 343 if (vap->va_flags & (IMMUTABLE | APPEND)) 344 return (0); 345 } 346 if (ip->i_e2fs_flags & (EXT2_APPEND | EXT2_IMMUTABLE)) 347 return (EPERM); 348 /* 349 * Go through the fields and update iff not VNOVAL. 350 */ 351 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 352 if (vp->v_mount->mnt_flag & MNT_RDONLY) 353 return (EROFS); 354 error = ext2fs_chown(vp, vap->va_uid, vap->va_gid, cred, p); 355 if (error) 356 return (error); 357 } 358 if (vap->va_size != VNOVAL) { 359 /* 360 * Disallow write attempts on read-only file systems; 361 * unless the file is a socket, fifo, or a block or 362 * character device resident on the file system. 363 */ 364 switch (vp->v_type) { 365 case VDIR: 366 return (EISDIR); 367 case VLNK: 368 case VREG: 369 if (vp->v_mount->mnt_flag & MNT_RDONLY) 370 return (EROFS); 371 default: 372 break; 373 } 374 error = VOP_TRUNCATE(vp, vap->va_size, 0, cred, p); 375 if (error) 376 return (error); 377 } 378 ip = VTOI(vp); 379 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 380 if (vp->v_mount->mnt_flag & MNT_RDONLY) 381 return (EROFS); 382 if (cred->cr_uid != ip->i_e2fs_uid && 383 (error = suser(cred, &p->p_acflag)) && 384 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 385 (error = VOP_ACCESS(vp, VWRITE, cred, p)))) 386 return (error); 387 if (vap->va_atime.tv_sec != VNOVAL) 388 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 389 ip->i_flag |= IN_ACCESS; 390 if (vap->va_mtime.tv_sec != VNOVAL) 391 ip->i_flag |= IN_CHANGE | IN_UPDATE; 392 error = VOP_UPDATE(vp, &vap->va_atime, &vap->va_mtime, 1); 393 if (error) 394 return (error); 395 } 396 error = 0; 397 if (vap->va_mode != (mode_t)VNOVAL) { 398 if (vp->v_mount->mnt_flag & MNT_RDONLY) 399 return (EROFS); 400 error = ext2fs_chmod(vp, (int)vap->va_mode, cred, p); 401 } 402 return (error); 403 } 404 405 /* 406 * Change the mode on a file. 407 * Inode must be locked before calling. 408 */ 409 static int 410 ext2fs_chmod(vp, mode, cred, p) 411 register struct vnode *vp; 412 register int mode; 413 register struct ucred *cred; 414 struct proc *p; 415 { 416 register struct inode *ip = VTOI(vp); 417 int error; 418 419 if (cred->cr_uid != ip->i_e2fs_uid && 420 (error = suser(cred, &p->p_acflag))) 421 return (error); 422 if (cred->cr_uid) { 423 if (vp->v_type != VDIR && (mode & S_ISTXT)) 424 return (EFTYPE); 425 if (!groupmember(ip->i_e2fs_gid, cred) && (mode & ISGID)) 426 return (EPERM); 427 } 428 ip->i_e2fs_mode &= ~ALLPERMS; 429 ip->i_e2fs_mode |= (mode & ALLPERMS); 430 ip->i_flag |= IN_CHANGE; 431 if ((vp->v_flag & VTEXT) && (ip->i_e2fs_mode & S_ISTXT) == 0) 432 #if defined(UVM) 433 (void) uvm_vnp_uncache(vp); 434 #else 435 (void) vnode_pager_uncache(vp); 436 #endif 437 return (0); 438 } 439 440 /* 441 * Perform chown operation on inode ip; 442 * inode must be locked prior to call. 443 */ 444 static int 445 ext2fs_chown(vp, uid, gid, cred, p) 446 register struct vnode *vp; 447 uid_t uid; 448 gid_t gid; 449 struct ucred *cred; 450 struct proc *p; 451 { 452 register struct inode *ip = VTOI(vp); 453 uid_t ouid; 454 gid_t ogid; 455 int error = 0; 456 457 if (uid == (uid_t)VNOVAL) 458 uid = ip->i_e2fs_uid; 459 if (gid == (gid_t)VNOVAL) 460 gid = ip->i_e2fs_gid; 461 /* 462 * If we don't own the file, are trying to change the owner 463 * of the file, or are not a member of the target group, 464 * the caller must be superuser or the call fails. 465 */ 466 if ((cred->cr_uid != ip->i_e2fs_uid || uid != ip->i_e2fs_uid || 467 (gid != ip->i_e2fs_gid && !groupmember((gid_t)gid, cred))) && 468 (error = suser(cred, &p->p_acflag))) 469 return (error); 470 ogid = ip->i_e2fs_gid; 471 ouid = ip->i_e2fs_uid; 472 473 ip->i_e2fs_gid = gid; 474 ip->i_e2fs_uid = uid; 475 if (ouid != uid || ogid != gid) 476 ip->i_flag |= IN_CHANGE; 477 if (ouid != uid && cred->cr_uid != 0) 478 ip->i_e2fs_mode &= ~ISUID; 479 if (ogid != gid && cred->cr_uid != 0) 480 ip->i_e2fs_mode &= ~ISGID; 481 return (0); 482 } 483 484 int 485 ext2fs_remove(v) 486 void *v; 487 { 488 struct vop_remove_args /* { 489 struct vnode *a_dvp; 490 struct vnode *a_vp; 491 struct componentname *a_cnp; 492 } */ *ap = v; 493 struct inode *ip; 494 struct vnode *vp = ap->a_vp; 495 struct vnode *dvp = ap->a_dvp; 496 int error; 497 498 ip = VTOI(vp); 499 if (vp->v_type == VDIR || 500 (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 501 (VTOI(dvp)->i_e2fs_flags & EXT2_APPEND)) { 502 error = EPERM; 503 goto out; 504 } 505 error = ext2fs_dirremove(dvp, ap->a_cnp); 506 if (error == 0) { 507 ip->i_e2fs_nlink--; 508 ip->i_flag |= IN_CHANGE; 509 } 510 out: 511 if (dvp == vp) 512 vrele(vp); 513 else 514 vput(vp); 515 vput(dvp); 516 return (error); 517 } 518 519 /* 520 * link vnode call 521 */ 522 int 523 ext2fs_link(v) 524 void *v; 525 { 526 struct vop_link_args /* { 527 struct vnode *a_dvp; 528 struct vnode *a_vp; 529 struct componentname *a_cnp; 530 } */ *ap = v; 531 struct vnode *dvp = ap->a_dvp; 532 struct vnode *vp = ap->a_vp; 533 struct componentname *cnp = ap->a_cnp; 534 struct inode *ip; 535 struct timespec ts; 536 int error; 537 538 #ifdef DIAGNOSTIC 539 if ((cnp->cn_flags & HASBUF) == 0) 540 panic("ext2fs_link: no name"); 541 #endif 542 if (vp->v_type == VDIR) { 543 VOP_ABORTOP(dvp, cnp); 544 error = EISDIR; 545 goto out2; 546 } 547 if (dvp->v_mount != vp->v_mount) { 548 VOP_ABORTOP(dvp, cnp); 549 error = EXDEV; 550 goto out2; 551 } 552 if (dvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE))) { 553 VOP_ABORTOP(dvp, cnp); 554 goto out2; 555 } 556 ip = VTOI(vp); 557 if ((nlink_t)ip->i_e2fs_nlink >= LINK_MAX) { 558 VOP_ABORTOP(dvp, cnp); 559 error = EMLINK; 560 goto out1; 561 } 562 if (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) { 563 VOP_ABORTOP(dvp, cnp); 564 error = EPERM; 565 goto out1; 566 } 567 ip->i_e2fs_nlink++; 568 ip->i_flag |= IN_CHANGE; 569 TIMEVAL_TO_TIMESPEC(&time, &ts); 570 error = VOP_UPDATE(vp, &ts, &ts, 1); 571 if (!error) 572 error = ext2fs_direnter(ip, dvp, cnp); 573 if (error) { 574 ip->i_e2fs_nlink--; 575 ip->i_flag |= IN_CHANGE; 576 } 577 FREE(cnp->cn_pnbuf, M_NAMEI); 578 out1: 579 if (dvp != vp) 580 VOP_UNLOCK(vp, 0); 581 out2: 582 vput(dvp); 583 return (error); 584 } 585 586 /* 587 * Rename system call. 588 * rename("foo", "bar"); 589 * is essentially 590 * unlink("bar"); 591 * link("foo", "bar"); 592 * unlink("foo"); 593 * but ``atomically''. Can't do full commit without saving state in the 594 * inode on disk which isn't feasible at this time. Best we can do is 595 * always guarantee the target exists. 596 * 597 * Basic algorithm is: 598 * 599 * 1) Bump link count on source while we're linking it to the 600 * target. This also ensure the inode won't be deleted out 601 * from underneath us while we work (it may be truncated by 602 * a concurrent `trunc' or `open' for creation). 603 * 2) Link source to destination. If destination already exists, 604 * delete it first. 605 * 3) Unlink source reference to inode if still around. If a 606 * directory was moved and the parent of the destination 607 * is different from the source, patch the ".." entry in the 608 * directory. 609 */ 610 int 611 ext2fs_rename(v) 612 void *v; 613 { 614 struct vop_rename_args /* { 615 struct vnode *a_fdvp; 616 struct vnode *a_fvp; 617 struct componentname *a_fcnp; 618 struct vnode *a_tdvp; 619 struct vnode *a_tvp; 620 struct componentname *a_tcnp; 621 } */ *ap = v; 622 struct vnode *tvp = ap->a_tvp; 623 register struct vnode *tdvp = ap->a_tdvp; 624 struct vnode *fvp = ap->a_fvp; 625 struct vnode *fdvp = ap->a_fdvp; 626 struct componentname *tcnp = ap->a_tcnp; 627 struct componentname *fcnp = ap->a_fcnp; 628 struct inode *ip, *xp, *dp; 629 struct ext2fs_dirtemplate dirbuf; 630 struct timespec ts; 631 int doingdirectory = 0, oldparent = 0, newparent = 0; 632 int error = 0; 633 u_char namlen; 634 635 #ifdef DIAGNOSTIC 636 if ((tcnp->cn_flags & HASBUF) == 0 || 637 (fcnp->cn_flags & HASBUF) == 0) 638 panic("ext2fs_rename: no name"); 639 #endif 640 /* 641 * Check for cross-device rename. 642 */ 643 if ((fvp->v_mount != tdvp->v_mount) || 644 (tvp && (fvp->v_mount != tvp->v_mount))) { 645 error = EXDEV; 646 abortit: 647 VOP_ABORTOP(tdvp, tcnp); /* XXX, why not in NFS? */ 648 if (tdvp == tvp) 649 vrele(tdvp); 650 else 651 vput(tdvp); 652 if (tvp) 653 vput(tvp); 654 VOP_ABORTOP(fdvp, fcnp); /* XXX, why not in NFS? */ 655 vrele(fdvp); 656 vrele(fvp); 657 return (error); 658 } 659 660 /* 661 * Check if just deleting a link name. 662 */ 663 if (tvp && ((VTOI(tvp)->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 664 (VTOI(tdvp)->i_e2fs_flags & EXT2_APPEND))) { 665 error = EPERM; 666 goto abortit; 667 } 668 if (fvp == tvp) { 669 if (fvp->v_type == VDIR) { 670 error = EINVAL; 671 goto abortit; 672 } 673 674 /* Release destination completely. */ 675 VOP_ABORTOP(tdvp, tcnp); 676 vput(tdvp); 677 vput(tvp); 678 679 /* Delete source. */ 680 vrele(fdvp); 681 vrele(fvp); 682 fcnp->cn_flags &= ~MODMASK; 683 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 684 if ((fcnp->cn_flags & SAVESTART) == 0) 685 panic("ext2fs_rename: lost from startdir"); 686 fcnp->cn_nameiop = DELETE; 687 (void) relookup(fdvp, &fvp, fcnp); 688 return (VOP_REMOVE(fdvp, fvp, fcnp)); 689 } 690 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 691 goto abortit; 692 dp = VTOI(fdvp); 693 ip = VTOI(fvp); 694 if ((ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) || 695 (dp->i_e2fs_flags & EXT2_APPEND)) { 696 VOP_UNLOCK(fvp, 0); 697 error = EPERM; 698 goto abortit; 699 } 700 if ((ip->i_e2fs_mode & IFMT) == IFDIR) { 701 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 702 if (!error && tvp) 703 error = VOP_ACCESS(tvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 704 if (error) { 705 VOP_UNLOCK(fvp, 0); 706 error = EACCES; 707 goto abortit; 708 } 709 /* 710 * Avoid ".", "..", and aliases of "." for obvious reasons. 711 */ 712 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 713 dp == ip || 714 (fcnp->cn_flags&ISDOTDOT) || 715 (tcnp->cn_flags & ISDOTDOT) || 716 (ip->i_flag & IN_RENAME)) { 717 VOP_UNLOCK(fvp, 0); 718 error = EINVAL; 719 goto abortit; 720 } 721 ip->i_flag |= IN_RENAME; 722 oldparent = dp->i_number; 723 doingdirectory++; 724 } 725 vrele(fdvp); 726 727 /* 728 * When the target exists, both the directory 729 * and target vnodes are returned locked. 730 */ 731 dp = VTOI(tdvp); 732 xp = NULL; 733 if (tvp) 734 xp = VTOI(tvp); 735 736 /* 737 * 1) Bump link count while we're moving stuff 738 * around. If we crash somewhere before 739 * completing our work, the link count 740 * may be wrong, but correctable. 741 */ 742 ip->i_e2fs_nlink++; 743 ip->i_flag |= IN_CHANGE; 744 TIMEVAL_TO_TIMESPEC(&time, &ts); 745 if ((error = VOP_UPDATE(fvp, &ts, &ts, 1)) != 0) { 746 VOP_UNLOCK(fvp, 0); 747 goto bad; 748 } 749 750 /* 751 * If ".." must be changed (ie the directory gets a new 752 * parent) then the source directory must not be in the 753 * directory heirarchy above the target, as this would 754 * orphan everything below the source directory. Also 755 * the user must have write permission in the source so 756 * as to be able to change "..". We must repeat the call 757 * to namei, as the parent directory is unlocked by the 758 * call to checkpath(). 759 */ 760 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 761 VOP_UNLOCK(fvp, 0); 762 if (oldparent != dp->i_number) 763 newparent = dp->i_number; 764 if (doingdirectory && newparent) { 765 if (error) /* write access check above */ 766 goto bad; 767 if (xp != NULL) 768 vput(tvp); 769 error = ext2fs_checkpath(ip, dp, tcnp->cn_cred); 770 if (error != 0) 771 goto out; 772 if ((tcnp->cn_flags & SAVESTART) == 0) 773 panic("ext2fs_rename: lost to startdir"); 774 if ((error = relookup(tdvp, &tvp, tcnp)) != 0) 775 goto out; 776 dp = VTOI(tdvp); 777 xp = NULL; 778 if (tvp) 779 xp = VTOI(tvp); 780 } 781 /* 782 * 2) If target doesn't exist, link the target 783 * to the source and unlink the source. 784 * Otherwise, rewrite the target directory 785 * entry to reference the source inode and 786 * expunge the original entry's existence. 787 */ 788 if (xp == NULL) { 789 if (dp->i_dev != ip->i_dev) 790 panic("rename: EXDEV"); 791 /* 792 * Account for ".." in new directory. 793 * When source and destination have the same 794 * parent we don't fool with the link count. 795 */ 796 if (doingdirectory && newparent) { 797 if ((nlink_t)dp->i_e2fs_nlink >= LINK_MAX) { 798 error = EMLINK; 799 goto bad; 800 } 801 dp->i_e2fs_nlink++; 802 dp->i_flag |= IN_CHANGE; 803 if ((error = VOP_UPDATE(tdvp, &ts, &ts, 1)) != 0) 804 goto bad; 805 } 806 error = ext2fs_direnter(ip, tdvp, tcnp); 807 if (error != 0) { 808 if (doingdirectory && newparent) { 809 dp->i_e2fs_nlink--; 810 dp->i_flag |= IN_CHANGE; 811 (void)VOP_UPDATE(tdvp, &ts, &ts, 1); 812 } 813 goto bad; 814 } 815 vput(tdvp); 816 } else { 817 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) 818 panic("rename: EXDEV"); 819 /* 820 * Short circuit rename(foo, foo). 821 */ 822 if (xp->i_number == ip->i_number) 823 panic("rename: same file"); 824 /* 825 * If the parent directory is "sticky", then the user must 826 * own the parent directory, or the destination of the rename, 827 * otherwise the destination may not be changed (except by 828 * root). This implements append-only directories. 829 */ 830 if ((dp->i_e2fs_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 && 831 tcnp->cn_cred->cr_uid != dp->i_e2fs_uid && 832 xp->i_e2fs_uid != tcnp->cn_cred->cr_uid) { 833 error = EPERM; 834 goto bad; 835 } 836 /* 837 * Target must be empty if a directory and have no links 838 * to it. Also, ensure source and target are compatible 839 * (both directories, or both not directories). 840 */ 841 if ((xp->i_e2fs_mode & IFMT) == IFDIR) { 842 if (!ext2fs_dirempty(xp, dp->i_number, tcnp->cn_cred) || 843 xp->i_e2fs_nlink > 2) { 844 error = ENOTEMPTY; 845 goto bad; 846 } 847 if (!doingdirectory) { 848 error = ENOTDIR; 849 goto bad; 850 } 851 cache_purge(tdvp); 852 } else if (doingdirectory) { 853 error = EISDIR; 854 goto bad; 855 } 856 error = ext2fs_dirrewrite(dp, ip, tcnp); 857 if (error != 0) 858 goto bad; 859 /* 860 * If the target directory is in the same 861 * directory as the source directory, 862 * decrement the link count on the parent 863 * of the target directory. 864 */ 865 if (doingdirectory && !newparent) { 866 dp->i_e2fs_nlink--; 867 dp->i_flag |= IN_CHANGE; 868 } 869 vput(tdvp); 870 /* 871 * Adjust the link count of the target to 872 * reflect the dirrewrite above. If this is 873 * a directory it is empty and there are 874 * no links to it, so we can squash the inode and 875 * any space associated with it. We disallowed 876 * renaming over top of a directory with links to 877 * it above, as the remaining link would point to 878 * a directory without "." or ".." entries. 879 */ 880 xp->i_e2fs_nlink--; 881 if (doingdirectory) { 882 if (--xp->i_e2fs_nlink != 0) 883 panic("rename: linked directory"); 884 error = VOP_TRUNCATE(tvp, (off_t)0, IO_SYNC, 885 tcnp->cn_cred, tcnp->cn_proc); 886 } 887 xp->i_flag |= IN_CHANGE; 888 vput(tvp); 889 xp = NULL; 890 } 891 892 /* 893 * 3) Unlink the source. 894 */ 895 fcnp->cn_flags &= ~MODMASK; 896 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 897 if ((fcnp->cn_flags & SAVESTART) == 0) 898 panic("ext2fs_rename: lost from startdir"); 899 (void) relookup(fdvp, &fvp, fcnp); 900 if (fvp != NULL) { 901 xp = VTOI(fvp); 902 dp = VTOI(fdvp); 903 } else { 904 /* 905 * From name has disappeared. 906 */ 907 if (doingdirectory) 908 panic("ext2fs_rename: lost dir entry"); 909 vrele(ap->a_fvp); 910 return (0); 911 } 912 /* 913 * Ensure that the directory entry still exists and has not 914 * changed while the new name has been entered. If the source is 915 * a file then the entry may have been unlinked or renamed. In 916 * either case there is no further work to be done. If the source 917 * is a directory then it cannot have been rmdir'ed; its link 918 * count of three would cause a rmdir to fail with ENOTEMPTY. 919 * The IRENAME flag ensures that it cannot be moved by another 920 * rename. 921 */ 922 if (xp != ip) { 923 if (doingdirectory) 924 panic("ext2fs_rename: lost dir entry"); 925 } else { 926 /* 927 * If the source is a directory with a 928 * new parent, the link count of the old 929 * parent directory must be decremented 930 * and ".." set to point to the new parent. 931 */ 932 if (doingdirectory && newparent) { 933 dp->i_e2fs_nlink--; 934 dp->i_flag |= IN_CHANGE; 935 error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf, 936 sizeof (struct ext2fs_dirtemplate), (off_t)0, 937 UIO_SYSSPACE, IO_NODELOCKED, 938 tcnp->cn_cred, (size_t *)0, (struct proc *)0); 939 if (error == 0) { 940 namlen = fs2h16(dirbuf.dotdot_namlen); 941 if (namlen != 2 || 942 dirbuf.dotdot_name[0] != '.' || 943 dirbuf.dotdot_name[1] != '.') { 944 ufs_dirbad(xp, (doff_t)12, 945 "ext2fs_rename: mangled dir"); 946 } else { 947 dirbuf.dotdot_ino = h2fs32(newparent); 948 (void) vn_rdwr(UIO_WRITE, fvp, 949 (caddr_t)&dirbuf, 950 sizeof (struct dirtemplate), 951 (off_t)0, UIO_SYSSPACE, 952 IO_NODELOCKED|IO_SYNC, 953 tcnp->cn_cred, (size_t *)0, 954 (struct proc *)0); 955 cache_purge(fdvp); 956 } 957 } 958 } 959 error = ext2fs_dirremove(fdvp, fcnp); 960 if (!error) { 961 xp->i_e2fs_nlink--; 962 xp->i_flag |= IN_CHANGE; 963 } 964 xp->i_flag &= ~IN_RENAME; 965 } 966 if (dp) 967 vput(fdvp); 968 if (xp) 969 vput(fvp); 970 vrele(ap->a_fvp); 971 return (error); 972 973 bad: 974 if (xp) 975 vput(ITOV(xp)); 976 vput(ITOV(dp)); 977 out: 978 if (doingdirectory) 979 ip->i_flag &= ~IN_RENAME; 980 if (vn_lock(fvp, LK_EXCLUSIVE) == 0) { 981 ip->i_e2fs_nlink--; 982 ip->i_flag |= IN_CHANGE; 983 vput(fvp); 984 } else 985 vrele(fvp); 986 return (error); 987 } 988 989 /* 990 * Mkdir system call 991 */ 992 int 993 ext2fs_mkdir(v) 994 void *v; 995 { 996 struct vop_mkdir_args /* { 997 struct vnode *a_dvp; 998 struct vnode **a_vpp; 999 struct componentname *a_cnp; 1000 struct vattr *a_vap; 1001 } */ *ap = v; 1002 register struct vnode *dvp = ap->a_dvp; 1003 register struct vattr *vap = ap->a_vap; 1004 register struct componentname *cnp = ap->a_cnp; 1005 register struct inode *ip, *dp; 1006 struct vnode *tvp; 1007 struct ext2fs_dirtemplate dirtemplate; 1008 struct timespec ts; 1009 int error, dmode; 1010 1011 #ifdef DIAGNOSTIC 1012 if ((cnp->cn_flags & HASBUF) == 0) 1013 panic("ext2fs_mkdir: no name"); 1014 #endif 1015 dp = VTOI(dvp); 1016 if ((nlink_t)dp->i_e2fs_nlink >= LINK_MAX) { 1017 error = EMLINK; 1018 goto out; 1019 } 1020 dmode = vap->va_mode & ACCESSPERMS; 1021 dmode |= IFDIR; 1022 /* 1023 * Must simulate part of ext2fs_makeinode here to acquire the inode, 1024 * but not have it entered in the parent directory. The entry is 1025 * made later after writing "." and ".." entries. 1026 */ 1027 if ((error = VOP_VALLOC(dvp, dmode, cnp->cn_cred, &tvp)) != 0) 1028 goto out; 1029 ip = VTOI(tvp); 1030 ip->i_e2fs_uid = cnp->cn_cred->cr_uid; 1031 ip->i_e2fs_gid = dp->i_e2fs_gid; 1032 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1033 ip->i_e2fs_mode = dmode; 1034 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ 1035 ip->i_e2fs_nlink = 2; 1036 TIMEVAL_TO_TIMESPEC(&time, &ts); 1037 error = VOP_UPDATE(tvp, &ts, &ts, 1); 1038 1039 /* 1040 * Bump link count in parent directory 1041 * to reflect work done below. Should 1042 * be done before reference is created 1043 * so reparation is possible if we crash. 1044 */ 1045 dp->i_e2fs_nlink++; 1046 dp->i_flag |= IN_CHANGE; 1047 if ((error = VOP_UPDATE(dvp, &ts, &ts, 1)) != 0) 1048 goto bad; 1049 1050 /* Initialize directory with "." and ".." from static template. */ 1051 memset(&dirtemplate, 0, sizeof(dirtemplate)); 1052 dirtemplate.dot_ino = h2fs32(ip->i_number); 1053 dirtemplate.dot_reclen = h2fs16(12); 1054 dirtemplate.dot_namlen = h2fs16(1); 1055 dirtemplate.dot_name[0] = '.'; 1056 dirtemplate.dotdot_ino = h2fs32(dp->i_number); 1057 dirtemplate.dotdot_reclen = h2fs16(VTOI(dvp)->i_e2fs->e2fs_bsize - 12); 1058 dirtemplate.dotdot_namlen = h2fs16(2); 1059 dirtemplate.dotdot_name[0] = dirtemplate.dotdot_name[1] = '.'; 1060 error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate, 1061 sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, 1062 IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (size_t *)0, (struct proc *)0); 1063 if (error) { 1064 dp->i_e2fs_nlink--; 1065 dp->i_flag |= IN_CHANGE; 1066 goto bad; 1067 } 1068 if (VTOI(dvp)->i_e2fs->e2fs_bsize > 1069 VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_bsize) 1070 panic("ext2fs_mkdir: blksize"); /* XXX should grow with balloc() */ 1071 else { 1072 ip->i_e2fs_size = VTOI(dvp)->i_e2fs->e2fs_bsize; 1073 ip->i_flag |= IN_CHANGE; 1074 } 1075 1076 /* Directory set up, now install it's entry in the parent directory. */ 1077 error = ext2fs_direnter(ip, dvp, cnp); 1078 if (error != 0) { 1079 dp->i_e2fs_nlink--; 1080 dp->i_flag |= IN_CHANGE; 1081 } 1082 bad: 1083 /* 1084 * No need to do an explicit VOP_TRUNCATE here, vrele will do this 1085 * for us because we set the link count to 0. 1086 */ 1087 if (error) { 1088 ip->i_e2fs_nlink = 0; 1089 ip->i_flag |= IN_CHANGE; 1090 vput(tvp); 1091 } else 1092 *ap->a_vpp = tvp; 1093 out: 1094 FREE(cnp->cn_pnbuf, M_NAMEI); 1095 vput(dvp); 1096 return (error); 1097 } 1098 1099 /* 1100 * Rmdir system call. 1101 */ 1102 int 1103 ext2fs_rmdir(v) 1104 void *v; 1105 { 1106 struct vop_rmdir_args /* { 1107 struct vnode *a_dvp; 1108 struct vnode *a_vp; 1109 struct componentname *a_cnp; 1110 } */ *ap = v; 1111 register struct vnode *vp = ap->a_vp; 1112 register struct vnode *dvp = ap->a_dvp; 1113 register struct componentname *cnp = ap->a_cnp; 1114 register struct inode *ip, *dp; 1115 int error; 1116 1117 ip = VTOI(vp); 1118 dp = VTOI(dvp); 1119 /* 1120 * No rmdir "." please. 1121 */ 1122 if (dp == ip) { 1123 vrele(dvp); 1124 vput(vp); 1125 return (EINVAL); 1126 } 1127 /* 1128 * Verify the directory is empty (and valid). 1129 * (Rmdir ".." won't be valid since 1130 * ".." will contain a reference to 1131 * the current directory and thus be 1132 * non-empty.) 1133 */ 1134 error = 0; 1135 if (ip->i_e2fs_nlink != 2 || 1136 !ext2fs_dirempty(ip, dp->i_number, cnp->cn_cred)) { 1137 error = ENOTEMPTY; 1138 goto out; 1139 } 1140 if ((dp->i_e2fs_flags & EXT2_APPEND) || 1141 (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND))) { 1142 error = EPERM; 1143 goto out; 1144 } 1145 /* 1146 * Delete reference to directory before purging 1147 * inode. If we crash in between, the directory 1148 * will be reattached to lost+found, 1149 */ 1150 error = ext2fs_dirremove(dvp, cnp); 1151 if (error != 0) 1152 goto out; 1153 dp->i_e2fs_nlink--; 1154 dp->i_flag |= IN_CHANGE; 1155 cache_purge(dvp); 1156 vput(dvp); 1157 dvp = NULL; 1158 /* 1159 * Truncate inode. The only stuff left 1160 * in the directory is "." and "..". The 1161 * "." reference is inconsequential since 1162 * we're quashing it. The ".." reference 1163 * has already been adjusted above. We've 1164 * removed the "." reference and the reference 1165 * in the parent directory, but there may be 1166 * other hard links so decrement by 2 and 1167 * worry about them later. 1168 */ 1169 ip->i_e2fs_nlink -= 2; 1170 error = VOP_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred, 1171 cnp->cn_proc); 1172 cache_purge(ITOV(ip)); 1173 out: 1174 if (dvp) 1175 vput(dvp); 1176 vput(vp); 1177 return (error); 1178 } 1179 1180 /* 1181 * symlink -- make a symbolic link 1182 */ 1183 int 1184 ext2fs_symlink(v) 1185 void *v; 1186 { 1187 struct vop_symlink_args /* { 1188 struct vnode *a_dvp; 1189 struct vnode **a_vpp; 1190 struct componentname *a_cnp; 1191 struct vattr *a_vap; 1192 char *a_target; 1193 } */ *ap = v; 1194 register struct vnode *vp, **vpp = ap->a_vpp; 1195 register struct inode *ip; 1196 int len, error; 1197 1198 error = ext2fs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, 1199 vpp, ap->a_cnp); 1200 if (error) 1201 return (error); 1202 vp = *vpp; 1203 len = strlen(ap->a_target); 1204 if (len < vp->v_mount->mnt_maxsymlinklen) { 1205 ip = VTOI(vp); 1206 memcpy((char *)ip->i_din.e2fs_din.e2di_shortlink, ap->a_target, len); 1207 ip->i_e2fs_size = len; 1208 ip->i_flag |= IN_CHANGE | IN_UPDATE; 1209 } else 1210 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, 1211 UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, 1212 (size_t *)0, (struct proc *)0); 1213 vput(vp); 1214 return (error); 1215 } 1216 1217 /* 1218 * Return target name of a symbolic link 1219 */ 1220 int 1221 ext2fs_readlink(v) 1222 void *v; 1223 { 1224 struct vop_readlink_args /* { 1225 struct vnode *a_vp; 1226 struct uio *a_uio; 1227 struct ucred *a_cred; 1228 } */ *ap = v; 1229 register struct vnode *vp = ap->a_vp; 1230 register struct inode *ip = VTOI(vp); 1231 int isize; 1232 1233 isize = ip->i_e2fs_size; 1234 if (isize < vp->v_mount->mnt_maxsymlinklen || 1235 (vp->v_mount->mnt_maxsymlinklen == 0 && ip->i_e2fs_nblock == 0)) { 1236 uiomove((char *)ip->i_din.e2fs_din.e2di_shortlink, isize, ap->a_uio); 1237 return (0); 1238 } 1239 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); 1240 } 1241 1242 /* 1243 * Advisory record locking support 1244 */ 1245 int 1246 ext2fs_advlock(v) 1247 void *v; 1248 { 1249 struct vop_advlock_args /* { 1250 struct vnode *a_vp; 1251 caddr_t a_id; 1252 int a_op; 1253 struct flock *a_fl; 1254 int a_flags; 1255 } */ *ap = v; 1256 register struct inode *ip = VTOI(ap->a_vp); 1257 1258 return (lf_advlock(&ip->i_lockf, ip->i_e2fs_size, ap->a_id, ap->a_op, 1259 ap->a_fl, ap->a_flags)); 1260 } 1261 1262 /* 1263 * Initialize the vnode associated with a new inode, handle aliased 1264 * vnodes. 1265 */ 1266 int 1267 ext2fs_vinit(mntp, specops, fifoops, vpp) 1268 struct mount *mntp; 1269 int (**specops) __P((void *)); 1270 int (**fifoops) __P((void *)); 1271 struct vnode **vpp; 1272 { 1273 struct inode *ip; 1274 struct vnode *vp, *nvp; 1275 1276 vp = *vpp; 1277 ip = VTOI(vp); 1278 switch(vp->v_type = IFTOVT(ip->i_e2fs_mode)) { 1279 case VCHR: 1280 case VBLK: 1281 vp->v_op = specops; 1282 if ((nvp = checkalias(vp, fs2h32(ip->i_din.e2fs_din.e2di_rdev), mntp)) 1283 != NULL) { 1284 /* 1285 * Discard unneeded vnode, but save its inode. 1286 * Note that the lock is carried over in the inode 1287 * to the replacement vnode. 1288 */ 1289 nvp->v_data = vp->v_data; 1290 vp->v_data = NULL; 1291 vp->v_op = spec_vnodeop_p; 1292 vrele(vp); 1293 vgone(vp); 1294 /* 1295 * Reinitialize aliased inode. 1296 */ 1297 vp = nvp; 1298 ip->i_vnode = vp; 1299 } 1300 break; 1301 case VFIFO: 1302 vp->v_op = fifoops; 1303 break; 1304 case VNON: 1305 case VBAD: 1306 case VSOCK: 1307 case VLNK: 1308 case VDIR: 1309 case VREG: 1310 break; 1311 } 1312 if (ip->i_number == ROOTINO) 1313 vp->v_flag |= VROOT; 1314 /* 1315 * Initialize modrev times 1316 */ 1317 SETHIGH(ip->i_modrev, mono_time.tv_sec); 1318 SETLOW(ip->i_modrev, mono_time.tv_usec * 4294); 1319 *vpp = vp; 1320 return (0); 1321 } 1322 1323 /* 1324 * Allocate a new inode. 1325 */ 1326 int 1327 ext2fs_makeinode(mode, dvp, vpp, cnp) 1328 int mode; 1329 struct vnode *dvp; 1330 struct vnode **vpp; 1331 struct componentname *cnp; 1332 { 1333 register struct inode *ip, *pdir; 1334 struct timespec ts; 1335 struct vnode *tvp; 1336 int error; 1337 1338 pdir = VTOI(dvp); 1339 #ifdef DIAGNOSTIC 1340 if ((cnp->cn_flags & HASBUF) == 0) 1341 panic("ext2fs_makeinode: no name"); 1342 #endif 1343 *vpp = NULL; 1344 if ((mode & IFMT) == 0) 1345 mode |= IFREG; 1346 1347 if ((error = VOP_VALLOC(dvp, mode, cnp->cn_cred, &tvp)) != 0) { 1348 free(cnp->cn_pnbuf, M_NAMEI); 1349 vput(dvp); 1350 return (error); 1351 } 1352 ip = VTOI(tvp); 1353 ip->i_e2fs_gid = pdir->i_e2fs_gid; 1354 ip->i_e2fs_uid = cnp->cn_cred->cr_uid; 1355 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1356 ip->i_e2fs_mode = mode; 1357 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ 1358 ip->i_e2fs_nlink = 1; 1359 if ((ip->i_e2fs_mode & ISGID) && 1360 !groupmember(ip->i_e2fs_gid, cnp->cn_cred) && 1361 suser(cnp->cn_cred, NULL)) 1362 ip->i_e2fs_mode &= ~ISGID; 1363 1364 /* 1365 * Make sure inode goes to disk before directory entry. 1366 */ 1367 TIMEVAL_TO_TIMESPEC(&time, &ts); 1368 if ((error = VOP_UPDATE(tvp, &ts, &ts, 1)) != 0) 1369 goto bad; 1370 error = ext2fs_direnter(ip, dvp, cnp); 1371 if (error != 0) 1372 goto bad; 1373 if ((cnp->cn_flags & SAVESTART) == 0) 1374 FREE(cnp->cn_pnbuf, M_NAMEI); 1375 vput(dvp); 1376 *vpp = tvp; 1377 return (0); 1378 1379 bad: 1380 /* 1381 * Write error occurred trying to update the inode 1382 * or the directory so must deallocate the inode. 1383 */ 1384 free(cnp->cn_pnbuf, M_NAMEI); 1385 vput(dvp); 1386 ip->i_e2fs_nlink = 0; 1387 ip->i_flag |= IN_CHANGE; 1388 vput(tvp); 1389 return (error); 1390 } 1391 1392 /* 1393 * Reclaim an inode so that it can be used for other purposes. 1394 */ 1395 int 1396 ext2fs_reclaim(v) 1397 void *v; 1398 { 1399 struct vop_reclaim_args /* { 1400 struct vnode *a_vp; 1401 } */ *ap = v; 1402 register struct vnode *vp = ap->a_vp; 1403 struct inode *ip; 1404 extern int prtactive; 1405 1406 if (prtactive && vp->v_usecount != 0) 1407 vprint("ext2fs_reclaim: pushing active", vp); 1408 /* 1409 * Remove the inode from its hash chain. 1410 */ 1411 ip = VTOI(vp); 1412 ufs_ihashrem(ip); 1413 /* 1414 * Purge old data structures associated with the inode. 1415 */ 1416 cache_purge(vp); 1417 if (ip->i_devvp) { 1418 vrele(ip->i_devvp); 1419 ip->i_devvp = 0; 1420 } 1421 1422 pool_put(&ext2fs_inode_pool, vp->v_data); 1423 vp->v_data = NULL; 1424 return (0); 1425 } 1426 1427 /* Global vfs data structures for ext2fs. */ 1428 int (**ext2fs_vnodeop_p) __P((void *)); 1429 struct vnodeopv_entry_desc ext2fs_vnodeop_entries[] = { 1430 { &vop_default_desc, vn_default_error }, 1431 { &vop_lookup_desc, ext2fs_lookup }, /* lookup */ 1432 { &vop_create_desc, ext2fs_create }, /* create */ 1433 { &vop_mknod_desc, ext2fs_mknod }, /* mknod */ 1434 { &vop_open_desc, ext2fs_open }, /* open */ 1435 { &vop_close_desc, ufs_close }, /* close */ 1436 { &vop_access_desc, ext2fs_access }, /* access */ 1437 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1438 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1439 { &vop_read_desc, ext2fs_read }, /* read */ 1440 { &vop_write_desc, ext2fs_write }, /* write */ 1441 { &vop_lease_desc, ufs_lease_check }, /* lease */ 1442 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 1443 { &vop_poll_desc, ufs_poll }, /* poll */ 1444 { &vop_revoke_desc, ufs_revoke }, /* revoke */ 1445 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 1446 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1447 { &vop_seek_desc, ufs_seek }, /* seek */ 1448 { &vop_remove_desc, ext2fs_remove }, /* remove */ 1449 { &vop_link_desc, ext2fs_link }, /* link */ 1450 { &vop_rename_desc, ext2fs_rename }, /* rename */ 1451 { &vop_mkdir_desc, ext2fs_mkdir }, /* mkdir */ 1452 { &vop_rmdir_desc, ext2fs_rmdir }, /* rmdir */ 1453 { &vop_symlink_desc, ext2fs_symlink }, /* symlink */ 1454 { &vop_readdir_desc, ext2fs_readdir }, /* readdir */ 1455 { &vop_readlink_desc, ext2fs_readlink }, /* readlink */ 1456 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 1457 { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ 1458 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1459 { &vop_lock_desc, ufs_lock }, /* lock */ 1460 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1461 { &vop_bmap_desc, ext2fs_bmap }, /* bmap */ 1462 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 1463 { &vop_print_desc, ufs_print }, /* print */ 1464 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1465 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 1466 { &vop_advlock_desc, ext2fs_advlock }, /* advlock */ 1467 { &vop_blkatoff_desc, ext2fs_blkatoff }, /* blkatoff */ 1468 { &vop_valloc_desc, ext2fs_valloc }, /* valloc */ 1469 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1470 { &vop_truncate_desc, ext2fs_truncate }, /* truncate */ 1471 { &vop_update_desc, ext2fs_update }, /* update */ 1472 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1473 { (struct vnodeop_desc*)NULL, (int(*) __P((void*)))NULL } 1474 }; 1475 struct vnodeopv_desc ext2fs_vnodeop_opv_desc = 1476 { &ext2fs_vnodeop_p, ext2fs_vnodeop_entries }; 1477 1478 int (**ext2fs_specop_p) __P((void *)); 1479 struct vnodeopv_entry_desc ext2fs_specop_entries[] = { 1480 { &vop_default_desc, vn_default_error }, 1481 { &vop_lookup_desc, spec_lookup }, /* lookup */ 1482 { &vop_create_desc, spec_create }, /* create */ 1483 { &vop_mknod_desc, spec_mknod }, /* mknod */ 1484 { &vop_open_desc, spec_open }, /* open */ 1485 { &vop_close_desc, ufsspec_close }, /* close */ 1486 { &vop_access_desc, ext2fs_access }, /* access */ 1487 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1488 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1489 { &vop_read_desc, ufsspec_read }, /* read */ 1490 { &vop_write_desc, ufsspec_write }, /* write */ 1491 { &vop_lease_desc, spec_lease_check }, /* lease */ 1492 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 1493 { &vop_poll_desc, spec_poll }, /* poll */ 1494 { &vop_revoke_desc, spec_revoke }, /* revoke */ 1495 { &vop_mmap_desc, spec_mmap }, /* mmap */ 1496 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1497 { &vop_seek_desc, spec_seek }, /* seek */ 1498 { &vop_remove_desc, spec_remove }, /* remove */ 1499 { &vop_link_desc, spec_link }, /* link */ 1500 { &vop_rename_desc, spec_rename }, /* rename */ 1501 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 1502 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 1503 { &vop_symlink_desc, spec_symlink }, /* symlink */ 1504 { &vop_readdir_desc, spec_readdir }, /* readdir */ 1505 { &vop_readlink_desc, spec_readlink }, /* readlink */ 1506 { &vop_abortop_desc, spec_abortop }, /* abortop */ 1507 { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ 1508 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1509 { &vop_lock_desc, ufs_lock }, /* lock */ 1510 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1511 { &vop_bmap_desc, spec_bmap }, /* bmap */ 1512 { &vop_strategy_desc, spec_strategy }, /* strategy */ 1513 { &vop_print_desc, ufs_print }, /* print */ 1514 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1515 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 1516 { &vop_advlock_desc, spec_advlock }, /* advlock */ 1517 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 1518 { &vop_valloc_desc, spec_valloc }, /* valloc */ 1519 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1520 { &vop_truncate_desc, spec_truncate }, /* truncate */ 1521 { &vop_update_desc, ext2fs_update }, /* update */ 1522 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1523 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 1524 }; 1525 struct vnodeopv_desc ext2fs_specop_opv_desc = 1526 { &ext2fs_specop_p, ext2fs_specop_entries }; 1527 1528 int (**ext2fs_fifoop_p) __P((void *)); 1529 struct vnodeopv_entry_desc ext2fs_fifoop_entries[] = { 1530 { &vop_default_desc, vn_default_error }, 1531 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 1532 { &vop_create_desc, fifo_create }, /* create */ 1533 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 1534 { &vop_open_desc, fifo_open }, /* open */ 1535 { &vop_close_desc, ufsfifo_close }, /* close */ 1536 { &vop_access_desc, ext2fs_access }, /* access */ 1537 { &vop_getattr_desc, ext2fs_getattr }, /* getattr */ 1538 { &vop_setattr_desc, ext2fs_setattr }, /* setattr */ 1539 { &vop_read_desc, ufsfifo_read }, /* read */ 1540 { &vop_write_desc, ufsfifo_write }, /* write */ 1541 { &vop_lease_desc, fifo_lease_check }, /* lease */ 1542 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 1543 { &vop_poll_desc, fifo_poll }, /* poll */ 1544 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 1545 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 1546 { &vop_fsync_desc, ext2fs_fsync }, /* fsync */ 1547 { &vop_seek_desc, fifo_seek }, /* seek */ 1548 { &vop_remove_desc, fifo_remove }, /* remove */ 1549 { &vop_link_desc, fifo_link }, /* link */ 1550 { &vop_rename_desc, fifo_rename }, /* rename */ 1551 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 1552 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 1553 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 1554 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 1555 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 1556 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 1557 { &vop_inactive_desc, ext2fs_inactive }, /* inactive */ 1558 { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */ 1559 { &vop_lock_desc, ufs_lock }, /* lock */ 1560 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 1561 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 1562 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 1563 { &vop_print_desc, ufs_print }, /* print */ 1564 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 1565 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 1566 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 1567 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 1568 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 1569 { &vop_vfree_desc, ext2fs_vfree }, /* vfree */ 1570 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 1571 { &vop_update_desc, ext2fs_update }, /* update */ 1572 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 1573 { (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } 1574 }; 1575 struct vnodeopv_desc ext2fs_fifoop_opv_desc = 1576 { &ext2fs_fifoop_p, ext2fs_fifoop_entries }; 1577
Indexes created Sun Sep 28 16:09:52 GMT 2025