| 1 | /* |
| 2 | * Copyright (c) 1989 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * %sccs.include.redist.c% |
| 6 | * |
| 7 | * @(#)vfs_syscalls.c 7.113 (Berkeley) %G% |
| 8 | */ |
| 9 | |
| 10 | #include <sys/param.h> |
| 11 | #include <sys/systm.h> |
| 12 | #include <sys/namei.h> |
| 13 | #include <sys/filedesc.h> |
| 14 | #include <sys/kernel.h> |
| 15 | #include <sys/file.h> |
| 16 | #include <sys/stat.h> |
| 17 | #include <sys/vnode.h> |
| 18 | #include <sys/mount.h> |
| 19 | #include <sys/proc.h> |
| 20 | #include <sys/uio.h> |
| 21 | #include <sys/malloc.h> |
| 22 | #include <sys/dirent.h> |
| 23 | |
| 24 | #include <vm/vm.h> |
| 25 | #include <sys/sysctl.h> |
| 26 | |
| 27 | #ifdef REF_DIAGNOSTIC |
| 28 | #define CURCOUNT (curproc ? curproc->p_spare[0] : 0) |
| 29 | #define CHECKPOINTREF int oldrefcount = CURCOUNT; |
| 30 | #define CHECKREFS(F) if (oldrefcount != CURCOUNT) \ |
| 31 | printf("REFCOUNT: %s, old=%d, new=%d\n", (F), oldrefcount, CURCOUNT); |
| 32 | #else |
| 33 | #define CHECKPOINTREF |
| 34 | #define CHECKREFS(D) |
| 35 | #endif |
| 36 | |
| 37 | /* |
| 38 | * Virtual File System System Calls |
| 39 | */ |
| 40 | |
| 41 | /* |
| 42 | * Mount system call. |
| 43 | */ |
| 44 | struct mount_args { |
| 45 | int type; |
| 46 | char *dir; |
| 47 | int flags; |
| 48 | caddr_t data; |
| 49 | }; |
| 50 | /* ARGSUSED */ |
| 51 | mount(p, uap, retval) |
| 52 | struct proc *p; |
| 53 | register struct mount_args *uap; |
| 54 | int *retval; |
| 55 | { |
| 56 | register struct vnode *vp; |
| 57 | register struct mount *mp; |
| 58 | int error, flag; |
| 59 | struct nameidata nd; |
| 60 | |
| 61 | /* |
| 62 | * Must be super user |
| 63 | */ |
| 64 | if (error = suser(p->p_ucred, &p->p_acflag)) |
| 65 | return (error); |
| 66 | /* |
| 67 | * Get vnode to be covered |
| 68 | */ |
| 69 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->dir, p); |
| 70 | if (error = namei(&nd)) |
| 71 | return (error); |
| 72 | vp = nd.ni_vp; |
| 73 | if (uap->flags & MNT_UPDATE) { |
| 74 | if ((vp->v_flag & VROOT) == 0) { |
| 75 | vput(vp); |
| 76 | return (EINVAL); |
| 77 | } |
| 78 | mp = vp->v_mount; |
| 79 | flag = mp->mnt_flag; |
| 80 | /* |
| 81 | * We only allow the filesystem to be reloaded if it |
| 82 | * is currently mounted read-only. |
| 83 | */ |
| 84 | if ((uap->flags & MNT_RELOAD) && |
| 85 | ((mp->mnt_flag & MNT_RDONLY) == 0)) { |
| 86 | vput(vp); |
| 87 | return (EOPNOTSUPP); /* Needs translation */ |
| 88 | } |
| 89 | mp->mnt_flag |= |
| 90 | uap->flags & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE); |
| 91 | VOP_UNLOCK(vp); |
| 92 | goto update; |
| 93 | } |
| 94 | if (vp->v_usecount != 1 && (uap->flags & MNT_UNION) == 0) { |
| 95 | vput(vp); |
| 96 | return (EBUSY); |
| 97 | } |
| 98 | if (error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) |
| 99 | return (error); |
| 100 | if (vp->v_type != VDIR) { |
| 101 | vput(vp); |
| 102 | return (ENOTDIR); |
| 103 | } |
| 104 | if ((unsigned long)uap->type > MOUNT_MAXTYPE || |
| 105 | vfssw[uap->type] == (struct vfsops *)0) { |
| 106 | vput(vp); |
| 107 | return (ENODEV); |
| 108 | } |
| 109 | |
| 110 | /* |
| 111 | * Allocate and initialize the file system. |
| 112 | */ |
| 113 | mp = (struct mount *)malloc((u_long)sizeof(struct mount), |
| 114 | M_MOUNT, M_WAITOK); |
| 115 | bzero((char *)mp, (u_long)sizeof(struct mount)); |
| 116 | mp->mnt_op = vfssw[uap->type]; |
| 117 | if (error = vfs_lock(mp)) { |
| 118 | free((caddr_t)mp, M_MOUNT); |
| 119 | vput(vp); |
| 120 | return (error); |
| 121 | } |
| 122 | if (vp->v_mountedhere != (struct mount *)0) { |
| 123 | vfs_unlock(mp); |
| 124 | free((caddr_t)mp, M_MOUNT); |
| 125 | vput(vp); |
| 126 | return (EBUSY); |
| 127 | } |
| 128 | vp->v_mountedhere = mp; |
| 129 | mp->mnt_vnodecovered = vp; |
| 130 | update: |
| 131 | /* |
| 132 | * Set the mount level flags. |
| 133 | */ |
| 134 | if (uap->flags & MNT_RDONLY) |
| 135 | mp->mnt_flag |= MNT_RDONLY; |
| 136 | else if (mp->mnt_flag & MNT_RDONLY) |
| 137 | mp->mnt_flag |= MNT_WANTRDWR; |
| 138 | mp->mnt_flag &=~ |
| 139 | (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION); |
| 140 | mp->mnt_flag |= uap->flags & |
| 141 | (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION); |
| 142 | /* |
| 143 | * Mount the filesystem. |
| 144 | */ |
| 145 | error = VFS_MOUNT(mp, uap->dir, uap->data, &nd, p); |
| 146 | if (mp->mnt_flag & MNT_UPDATE) { |
| 147 | vrele(vp); |
| 148 | if (mp->mnt_flag & MNT_WANTRDWR) |
| 149 | mp->mnt_flag &= ~MNT_RDONLY; |
| 150 | mp->mnt_flag &=~ |
| 151 | (MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR); |
| 152 | if (error) |
| 153 | mp->mnt_flag = flag; |
| 154 | return (error); |
| 155 | } |
| 156 | /* |
| 157 | * Put the new filesystem on the mount list after root. |
| 158 | */ |
| 159 | mp->mnt_next = rootfs->mnt_next; |
| 160 | mp->mnt_prev = rootfs; |
| 161 | rootfs->mnt_next = mp; |
| 162 | mp->mnt_next->mnt_prev = mp; |
| 163 | cache_purge(vp); |
| 164 | if (!error) { |
| 165 | VOP_UNLOCK(vp); |
| 166 | vfs_unlock(mp); |
| 167 | error = VFS_START(mp, 0, p); |
| 168 | } else { |
| 169 | vfs_remove(mp); |
| 170 | free((caddr_t)mp, M_MOUNT); |
| 171 | vput(vp); |
| 172 | } |
| 173 | return (error); |
| 174 | } |
| 175 | |
| 176 | /* |
| 177 | * Unmount system call. |
| 178 | * |
| 179 | * Note: unmount takes a path to the vnode mounted on as argument, |
| 180 | * not special file (as before). |
| 181 | */ |
| 182 | struct unmount_args { |
| 183 | char *pathp; |
| 184 | int flags; |
| 185 | }; |
| 186 | /* ARGSUSED */ |
| 187 | unmount(p, uap, retval) |
| 188 | struct proc *p; |
| 189 | register struct unmount_args *uap; |
| 190 | int *retval; |
| 191 | { |
| 192 | register struct vnode *vp; |
| 193 | struct mount *mp; |
| 194 | int error; |
| 195 | struct nameidata nd; |
| 196 | |
| 197 | /* |
| 198 | * Must be super user |
| 199 | */ |
| 200 | if (error = suser(p->p_ucred, &p->p_acflag)) |
| 201 | return (error); |
| 202 | |
| 203 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->pathp, p); |
| 204 | if (error = namei(&nd)) |
| 205 | return (error); |
| 206 | vp = nd.ni_vp; |
| 207 | /* |
| 208 | * Must be the root of the filesystem |
| 209 | */ |
| 210 | if ((vp->v_flag & VROOT) == 0) { |
| 211 | vput(vp); |
| 212 | return (EINVAL); |
| 213 | } |
| 214 | mp = vp->v_mount; |
| 215 | vput(vp); |
| 216 | return (dounmount(mp, uap->flags, p)); |
| 217 | } |
| 218 | |
| 219 | /* |
| 220 | * Do an unmount. |
| 221 | */ |
| 222 | dounmount(mp, flags, p) |
| 223 | register struct mount *mp; |
| 224 | int flags; |
| 225 | struct proc *p; |
| 226 | { |
| 227 | struct vnode *coveredvp; |
| 228 | int error; |
| 229 | |
| 230 | coveredvp = mp->mnt_vnodecovered; |
| 231 | if (vfs_busy(mp)) |
| 232 | return (EBUSY); |
| 233 | mp->mnt_flag |= MNT_UNMOUNT; |
| 234 | if (error = vfs_lock(mp)) |
| 235 | return (error); |
| 236 | |
| 237 | vnode_pager_umount(mp); /* release cached vnodes */ |
| 238 | cache_purgevfs(mp); /* remove cache entries for this file sys */ |
| 239 | if ((error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0 || |
| 240 | (flags & MNT_FORCE)) |
| 241 | error = VFS_UNMOUNT(mp, flags, p); |
| 242 | mp->mnt_flag &= ~MNT_UNMOUNT; |
| 243 | vfs_unbusy(mp); |
| 244 | if (error) { |
| 245 | vfs_unlock(mp); |
| 246 | } else { |
| 247 | vrele(coveredvp); |
| 248 | vfs_remove(mp); |
| 249 | if (mp->mnt_mounth != NULL) |
| 250 | panic("unmount: dangling vnode"); |
| 251 | free((caddr_t)mp, M_MOUNT); |
| 252 | } |
| 253 | return (error); |
| 254 | } |
| 255 | |
| 256 | /* |
| 257 | * Sync system call. |
| 258 | * Sync each mounted filesystem. |
| 259 | */ |
| 260 | #ifdef DIAGNOSTIC |
| 261 | int syncprt = 0; |
| 262 | struct ctldebug debug0 = { "syncprt", &syncprt }; |
| 263 | #endif |
| 264 | |
| 265 | struct sync_args { |
| 266 | int dummy; |
| 267 | }; |
| 268 | /* ARGSUSED */ |
| 269 | sync(p, uap, retval) |
| 270 | struct proc *p; |
| 271 | struct sync_args *uap; |
| 272 | int *retval; |
| 273 | { |
| 274 | register struct mount *mp; |
| 275 | struct mount *omp; |
| 276 | |
| 277 | mp = rootfs; |
| 278 | do { |
| 279 | /* |
| 280 | * The lock check below is to avoid races with mount |
| 281 | * and unmount. |
| 282 | */ |
| 283 | if ((mp->mnt_flag & (MNT_MLOCK|MNT_RDONLY|MNT_MPBUSY)) == 0 && |
| 284 | !vfs_busy(mp)) { |
| 285 | VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p); |
| 286 | omp = mp; |
| 287 | mp = mp->mnt_next; |
| 288 | vfs_unbusy(omp); |
| 289 | } else |
| 290 | mp = mp->mnt_next; |
| 291 | } while (mp != rootfs); |
| 292 | #ifdef DIAGNOSTIC |
| 293 | if (syncprt) |
| 294 | vfs_bufstats(); |
| 295 | #endif /* DIAGNOSTIC */ |
| 296 | return (0); |
| 297 | } |
| 298 | |
| 299 | /* |
| 300 | * Operate on filesystem quotas. |
| 301 | */ |
| 302 | struct quotactl_args { |
| 303 | char *path; |
| 304 | int cmd; |
| 305 | int uid; |
| 306 | caddr_t arg; |
| 307 | }; |
| 308 | /* ARGSUSED */ |
| 309 | quotactl(p, uap, retval) |
| 310 | struct proc *p; |
| 311 | register struct quotactl_args *uap; |
| 312 | int *retval; |
| 313 | { |
| 314 | register struct mount *mp; |
| 315 | int error; |
| 316 | struct nameidata nd; |
| 317 | |
| 318 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 319 | if (error = namei(&nd)) |
| 320 | return (error); |
| 321 | mp = nd.ni_vp->v_mount; |
| 322 | vrele(nd.ni_vp); |
| 323 | return (VFS_QUOTACTL(mp, uap->cmd, uap->uid, uap->arg, p)); |
| 324 | } |
| 325 | |
| 326 | /* |
| 327 | * Get filesystem statistics. |
| 328 | */ |
| 329 | struct statfs_args { |
| 330 | char *path; |
| 331 | struct statfs *buf; |
| 332 | }; |
| 333 | /* ARGSUSED */ |
| 334 | statfs(p, uap, retval) |
| 335 | struct proc *p; |
| 336 | register struct statfs_args *uap; |
| 337 | int *retval; |
| 338 | { |
| 339 | register struct mount *mp; |
| 340 | register struct statfs *sp; |
| 341 | int error; |
| 342 | struct nameidata nd; |
| 343 | |
| 344 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p); |
| 345 | if (error = namei(&nd)) |
| 346 | return (error); |
| 347 | mp = nd.ni_vp->v_mount; |
| 348 | sp = &mp->mnt_stat; |
| 349 | vrele(nd.ni_vp); |
| 350 | if (error = VFS_STATFS(mp, sp, p)) |
| 351 | return (error); |
| 352 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; |
| 353 | return (copyout((caddr_t)sp, (caddr_t)uap->buf, sizeof(*sp))); |
| 354 | } |
| 355 | |
| 356 | /* |
| 357 | * Get filesystem statistics. |
| 358 | */ |
| 359 | struct fstatfs_args { |
| 360 | int fd; |
| 361 | struct statfs *buf; |
| 362 | }; |
| 363 | /* ARGSUSED */ |
| 364 | fstatfs(p, uap, retval) |
| 365 | struct proc *p; |
| 366 | register struct fstatfs_args *uap; |
| 367 | int *retval; |
| 368 | { |
| 369 | struct file *fp; |
| 370 | struct mount *mp; |
| 371 | register struct statfs *sp; |
| 372 | int error; |
| 373 | |
| 374 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 375 | return (error); |
| 376 | mp = ((struct vnode *)fp->f_data)->v_mount; |
| 377 | sp = &mp->mnt_stat; |
| 378 | if (error = VFS_STATFS(mp, sp, p)) |
| 379 | return (error); |
| 380 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; |
| 381 | return (copyout((caddr_t)sp, (caddr_t)uap->buf, sizeof(*sp))); |
| 382 | } |
| 383 | |
| 384 | /* |
| 385 | * Get statistics on all filesystems. |
| 386 | */ |
| 387 | struct getfsstat_args { |
| 388 | struct statfs *buf; |
| 389 | long bufsize; |
| 390 | int flags; |
| 391 | }; |
| 392 | getfsstat(p, uap, retval) |
| 393 | struct proc *p; |
| 394 | register struct getfsstat_args *uap; |
| 395 | int *retval; |
| 396 | { |
| 397 | register struct mount *mp; |
| 398 | register struct statfs *sp; |
| 399 | caddr_t sfsp; |
| 400 | long count, maxcount, error; |
| 401 | |
| 402 | maxcount = uap->bufsize / sizeof(struct statfs); |
| 403 | sfsp = (caddr_t)uap->buf; |
| 404 | mp = rootfs; |
| 405 | count = 0; |
| 406 | do { |
| 407 | if (sfsp && count < maxcount && |
| 408 | ((mp->mnt_flag & MNT_MLOCK) == 0)) { |
| 409 | sp = &mp->mnt_stat; |
| 410 | /* |
| 411 | * If MNT_NOWAIT is specified, do not refresh the |
| 412 | * fsstat cache. MNT_WAIT overrides MNT_NOWAIT. |
| 413 | */ |
| 414 | if (((uap->flags & MNT_NOWAIT) == 0 || |
| 415 | (uap->flags & MNT_WAIT)) && |
| 416 | (error = VFS_STATFS(mp, sp, p))) { |
| 417 | mp = mp->mnt_prev; |
| 418 | continue; |
| 419 | } |
| 420 | sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; |
| 421 | if (error = copyout((caddr_t)sp, sfsp, sizeof(*sp))) |
| 422 | return (error); |
| 423 | sfsp += sizeof(*sp); |
| 424 | } |
| 425 | count++; |
| 426 | mp = mp->mnt_prev; |
| 427 | } while (mp != rootfs); |
| 428 | if (sfsp && count > maxcount) |
| 429 | *retval = maxcount; |
| 430 | else |
| 431 | *retval = count; |
| 432 | return (0); |
| 433 | } |
| 434 | |
| 435 | /* |
| 436 | * Change current working directory to a given file descriptor. |
| 437 | */ |
| 438 | struct fchdir_args { |
| 439 | int fd; |
| 440 | }; |
| 441 | /* ARGSUSED */ |
| 442 | fchdir(p, uap, retval) |
| 443 | struct proc *p; |
| 444 | struct fchdir_args *uap; |
| 445 | int *retval; |
| 446 | { |
| 447 | register struct filedesc *fdp = p->p_fd; |
| 448 | register struct vnode *vp; |
| 449 | struct file *fp; |
| 450 | int error; |
| 451 | |
| 452 | if (error = getvnode(fdp, uap->fd, &fp)) |
| 453 | return (error); |
| 454 | vp = (struct vnode *)fp->f_data; |
| 455 | VOP_LOCK(vp); |
| 456 | if (vp->v_type != VDIR) |
| 457 | error = ENOTDIR; |
| 458 | else |
| 459 | error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); |
| 460 | VOP_UNLOCK(vp); |
| 461 | if (error) |
| 462 | return (error); |
| 463 | VREF(vp); |
| 464 | vrele(fdp->fd_cdir); |
| 465 | fdp->fd_cdir = vp; |
| 466 | return (0); |
| 467 | } |
| 468 | |
| 469 | /* |
| 470 | * Change current working directory (``.''). |
| 471 | */ |
| 472 | struct chdir_args { |
| 473 | char *fname; |
| 474 | }; |
| 475 | /* ARGSUSED */ |
| 476 | chdir(p, uap, retval) |
| 477 | struct proc *p; |
| 478 | struct chdir_args *uap; |
| 479 | int *retval; |
| 480 | { |
| 481 | register struct filedesc *fdp = p->p_fd; |
| 482 | int error; |
| 483 | struct nameidata nd; |
| 484 | |
| 485 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p); |
| 486 | if (error = chdirec(&nd, p)) |
| 487 | return (error); |
| 488 | vrele(fdp->fd_cdir); |
| 489 | fdp->fd_cdir = nd.ni_vp; |
| 490 | return (0); |
| 491 | } |
| 492 | |
| 493 | /* |
| 494 | * Change notion of root (``/'') directory. |
| 495 | */ |
| 496 | struct chroot_args { |
| 497 | char *fname; |
| 498 | }; |
| 499 | /* ARGSUSED */ |
| 500 | chroot(p, uap, retval) |
| 501 | struct proc *p; |
| 502 | struct chroot_args *uap; |
| 503 | int *retval; |
| 504 | { |
| 505 | register struct filedesc *fdp = p->p_fd; |
| 506 | int error; |
| 507 | struct nameidata nd; |
| 508 | |
| 509 | if (error = suser(p->p_ucred, &p->p_acflag)) |
| 510 | return (error); |
| 511 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p); |
| 512 | if (error = chdirec(&nd, p)) |
| 513 | return (error); |
| 514 | if (fdp->fd_rdir != NULL) |
| 515 | vrele(fdp->fd_rdir); |
| 516 | fdp->fd_rdir = nd.ni_vp; |
| 517 | return (0); |
| 518 | } |
| 519 | |
| 520 | /* |
| 521 | * Common routine for chroot and chdir. |
| 522 | */ |
| 523 | chdirec(ndp, p) |
| 524 | register struct nameidata *ndp; |
| 525 | struct proc *p; |
| 526 | { |
| 527 | struct vnode *vp; |
| 528 | int error; |
| 529 | |
| 530 | if (error = namei(ndp)) |
| 531 | return (error); |
| 532 | vp = ndp->ni_vp; |
| 533 | if (vp->v_type != VDIR) |
| 534 | error = ENOTDIR; |
| 535 | else |
| 536 | error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); |
| 537 | VOP_UNLOCK(vp); |
| 538 | if (error) |
| 539 | vrele(vp); |
| 540 | return (error); |
| 541 | } |
| 542 | |
| 543 | /* |
| 544 | * Open system call. |
| 545 | * Check permissions, allocate an open file structure, |
| 546 | * and call the device open routine if any. |
| 547 | */ |
| 548 | struct open_args { |
| 549 | char *fname; |
| 550 | int mode; |
| 551 | int crtmode; |
| 552 | }; |
| 553 | open(p, uap, retval) |
| 554 | struct proc *p; |
| 555 | register struct open_args *uap; |
| 556 | int *retval; |
| 557 | { |
| 558 | register struct filedesc *fdp = p->p_fd; |
| 559 | register struct file *fp; |
| 560 | register struct vnode *vp; |
| 561 | int fmode, cmode; |
| 562 | struct file *nfp; |
| 563 | int type, indx, error; |
| 564 | struct flock lf; |
| 565 | struct nameidata nd; |
| 566 | extern struct fileops vnops; |
| 567 | |
| 568 | if (error = falloc(p, &nfp, &indx)) |
| 569 | return (error); |
| 570 | fp = nfp; |
| 571 | fmode = FFLAGS(uap->mode); |
| 572 | cmode = ((uap->crtmode &~ fdp->fd_cmask) & 07777) &~ S_ISVTX; |
| 573 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p); |
| 574 | p->p_dupfd = -indx - 1; /* XXX check for fdopen */ |
| 575 | if (error = vn_open(&nd, fmode, cmode)) { |
| 576 | ffree(fp); |
| 577 | if ((error == ENODEV || error == ENXIO) && |
| 578 | p->p_dupfd >= 0 && /* XXX from fdopen */ |
| 579 | (error = dupfdopen(fdp, indx, p->p_dupfd, |
| 580 | fmode, error)) == 0) { |
| 581 | *retval = indx; |
| 582 | return (0); |
| 583 | } |
| 584 | if (error == ERESTART) |
| 585 | error = EINTR; |
| 586 | fdp->fd_ofiles[indx] = NULL; |
| 587 | return (error); |
| 588 | } |
| 589 | p->p_dupfd = 0; |
| 590 | vp = nd.ni_vp; |
| 591 | fp->f_flag = fmode & FMASK; |
| 592 | fp->f_type = DTYPE_VNODE; |
| 593 | fp->f_ops = &vnops; |
| 594 | fp->f_data = (caddr_t)vp; |
| 595 | if (fmode & (O_EXLOCK | O_SHLOCK)) { |
| 596 | lf.l_whence = SEEK_SET; |
| 597 | lf.l_start = 0; |
| 598 | lf.l_len = 0; |
| 599 | if (fmode & O_EXLOCK) |
| 600 | lf.l_type = F_WRLCK; |
| 601 | else |
| 602 | lf.l_type = F_RDLCK; |
| 603 | type = F_FLOCK; |
| 604 | if ((fmode & FNONBLOCK) == 0) |
| 605 | type |= F_WAIT; |
| 606 | if (error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) { |
| 607 | VOP_UNLOCK(vp); |
| 608 | (void) vn_close(vp, fp->f_flag, fp->f_cred, p); |
| 609 | ffree(fp); |
| 610 | fdp->fd_ofiles[indx] = NULL; |
| 611 | return (error); |
| 612 | } |
| 613 | fp->f_flag |= FHASLOCK; |
| 614 | } |
| 615 | VOP_UNLOCK(vp); |
| 616 | *retval = indx; |
| 617 | return (0); |
| 618 | } |
| 619 | |
| 620 | #ifdef COMPAT_43 |
| 621 | /* |
| 622 | * Creat system call. |
| 623 | */ |
| 624 | struct ocreat_args { |
| 625 | char *fname; |
| 626 | int fmode; |
| 627 | }; |
| 628 | ocreat(p, uap, retval) |
| 629 | struct proc *p; |
| 630 | register struct ocreat_args *uap; |
| 631 | int *retval; |
| 632 | { |
| 633 | struct open_args openuap; |
| 634 | |
| 635 | openuap.fname = uap->fname; |
| 636 | openuap.crtmode = uap->fmode; |
| 637 | openuap.mode = O_WRONLY | O_CREAT | O_TRUNC; |
| 638 | return (open(p, &openuap, retval)); |
| 639 | } |
| 640 | #endif /* COMPAT_43 */ |
| 641 | |
| 642 | /* |
| 643 | * Mknod system call. |
| 644 | */ |
| 645 | struct mknod_args { |
| 646 | char *fname; |
| 647 | int fmode; |
| 648 | int dev; |
| 649 | }; |
| 650 | /* ARGSUSED */ |
| 651 | mknod(p, uap, retval) |
| 652 | struct proc *p; |
| 653 | register struct mknod_args *uap; |
| 654 | int *retval; |
| 655 | { |
| 656 | register struct vnode *vp; |
| 657 | struct vattr vattr; |
| 658 | int error; |
| 659 | struct nameidata nd; |
| 660 | |
| 661 | CHECKPOINTREF; |
| 662 | if (error = suser(p->p_ucred, &p->p_acflag)) |
| 663 | return (error); |
| 664 | NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->fname, p); |
| 665 | if (error = namei(&nd)) |
| 666 | return (error); |
| 667 | vp = nd.ni_vp; |
| 668 | if (vp != NULL) { |
| 669 | error = EEXIST; |
| 670 | goto out; |
| 671 | } |
| 672 | VATTR_NULL(&vattr); |
| 673 | switch (uap->fmode & S_IFMT) { |
| 674 | |
| 675 | case S_IFMT: /* used by badsect to flag bad sectors */ |
| 676 | vattr.va_type = VBAD; |
| 677 | break; |
| 678 | case S_IFCHR: |
| 679 | vattr.va_type = VCHR; |
| 680 | break; |
| 681 | case S_IFBLK: |
| 682 | vattr.va_type = VBLK; |
| 683 | break; |
| 684 | default: |
| 685 | error = EINVAL; |
| 686 | goto out; |
| 687 | } |
| 688 | vattr.va_mode = (uap->fmode & 07777) &~ p->p_fd->fd_cmask; |
| 689 | vattr.va_rdev = uap->dev; |
| 690 | out: |
| 691 | if (!error) { |
| 692 | LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 693 | error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); |
| 694 | } else { |
| 695 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 696 | if (nd.ni_dvp == vp) |
| 697 | vrele(nd.ni_dvp); |
| 698 | else |
| 699 | vput(nd.ni_dvp); |
| 700 | if (vp) |
| 701 | vrele(vp); |
| 702 | } |
| 703 | CHECKREFS("mknod"); |
| 704 | return (error); |
| 705 | } |
| 706 | |
| 707 | /* |
| 708 | * Mkfifo system call. |
| 709 | */ |
| 710 | struct mkfifo_args { |
| 711 | char *fname; |
| 712 | int fmode; |
| 713 | }; |
| 714 | /* ARGSUSED */ |
| 715 | mkfifo(p, uap, retval) |
| 716 | struct proc *p; |
| 717 | register struct mkfifo_args *uap; |
| 718 | int *retval; |
| 719 | { |
| 720 | struct vattr vattr; |
| 721 | int error; |
| 722 | struct nameidata nd; |
| 723 | |
| 724 | #ifndef FIFO |
| 725 | return (EOPNOTSUPP); |
| 726 | #else |
| 727 | NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->fname, p); |
| 728 | if (error = namei(&nd)) |
| 729 | return (error); |
| 730 | if (nd.ni_vp != NULL) { |
| 731 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 732 | if (nd.ni_dvp == nd.ni_vp) |
| 733 | vrele(nd.ni_dvp); |
| 734 | else |
| 735 | vput(nd.ni_dvp); |
| 736 | vrele(nd.ni_vp); |
| 737 | return (EEXIST); |
| 738 | } |
| 739 | VATTR_NULL(&vattr); |
| 740 | vattr.va_type = VFIFO; |
| 741 | vattr.va_mode = (uap->fmode & 07777) &~ p->p_fd->fd_cmask; |
| 742 | LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 743 | return (VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr)); |
| 744 | #endif /* FIFO */ |
| 745 | } |
| 746 | |
| 747 | /* |
| 748 | * Link system call. |
| 749 | */ |
| 750 | struct link_args { |
| 751 | char *target; |
| 752 | char *linkname; |
| 753 | }; |
| 754 | /* ARGSUSED */ |
| 755 | link(p, uap, retval) |
| 756 | struct proc *p; |
| 757 | register struct link_args *uap; |
| 758 | int *retval; |
| 759 | { |
| 760 | register struct vnode *vp, *xp; |
| 761 | int error; |
| 762 | struct nameidata nd; |
| 763 | |
| 764 | CHECKPOINTREF; |
| 765 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->target, p); |
| 766 | if (error = namei(&nd)) |
| 767 | return (error); |
| 768 | vp = nd.ni_vp; |
| 769 | if (vp->v_type == VDIR && |
| 770 | (error = suser(p->p_ucred, &p->p_acflag))) |
| 771 | goto out1; |
| 772 | nd.ni_cnd.cn_nameiop = CREATE; |
| 773 | nd.ni_cnd.cn_flags = LOCKPARENT; |
| 774 | nd.ni_dirp = (caddr_t)uap->linkname; |
| 775 | if (error = namei(&nd)) |
| 776 | goto out1; |
| 777 | xp = nd.ni_vp; |
| 778 | if (xp != NULL) { |
| 779 | error = EEXIST; |
| 780 | goto out; |
| 781 | } |
| 782 | xp = nd.ni_dvp; |
| 783 | out: |
| 784 | if (!error) { |
| 785 | LEASE_CHECK(xp, p, p->p_ucred, LEASE_WRITE); |
| 786 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 787 | error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); |
| 788 | } else { |
| 789 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 790 | if (nd.ni_dvp == nd.ni_vp) |
| 791 | vrele(nd.ni_dvp); |
| 792 | else |
| 793 | vput(nd.ni_dvp); |
| 794 | if (nd.ni_vp) |
| 795 | vrele(nd.ni_vp); |
| 796 | } |
| 797 | out1: |
| 798 | vrele(vp); |
| 799 | CHECKREFS("link"); |
| 800 | return (error); |
| 801 | } |
| 802 | |
| 803 | /* |
| 804 | * Make a symbolic link. |
| 805 | */ |
| 806 | struct symlink_args { |
| 807 | char *target; |
| 808 | char *linkname; |
| 809 | }; |
| 810 | /* ARGSUSED */ |
| 811 | symlink(p, uap, retval) |
| 812 | struct proc *p; |
| 813 | register struct symlink_args *uap; |
| 814 | int *retval; |
| 815 | { |
| 816 | struct vattr vattr; |
| 817 | char *target; |
| 818 | int error; |
| 819 | struct nameidata nd; |
| 820 | |
| 821 | CHECKPOINTREF; |
| 822 | MALLOC(target, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); |
| 823 | if (error = copyinstr(uap->target, target, MAXPATHLEN, (u_int *)0)) |
| 824 | goto out; |
| 825 | NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->linkname, p); |
| 826 | if (error = namei(&nd)) |
| 827 | goto out; |
| 828 | if (nd.ni_vp) { |
| 829 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 830 | if (nd.ni_dvp == nd.ni_vp) |
| 831 | vrele(nd.ni_dvp); |
| 832 | else |
| 833 | vput(nd.ni_dvp); |
| 834 | vrele(nd.ni_vp); |
| 835 | error = EEXIST; |
| 836 | goto out; |
| 837 | } |
| 838 | VATTR_NULL(&vattr); |
| 839 | vattr.va_mode = 0777 &~ p->p_fd->fd_cmask; |
| 840 | LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 841 | error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, target); |
| 842 | out: |
| 843 | FREE(target, M_NAMEI); |
| 844 | CHECKREFS("symlink"); |
| 845 | return (error); |
| 846 | } |
| 847 | |
| 848 | /* |
| 849 | * Delete a name from the filesystem. |
| 850 | */ |
| 851 | struct unlink_args { |
| 852 | char *name; |
| 853 | }; |
| 854 | /* ARGSUSED */ |
| 855 | unlink(p, uap, retval) |
| 856 | struct proc *p; |
| 857 | struct unlink_args *uap; |
| 858 | int *retval; |
| 859 | { |
| 860 | register struct vnode *vp; |
| 861 | int error; |
| 862 | struct nameidata nd; |
| 863 | |
| 864 | CHECKPOINTREF; |
| 865 | NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, uap->name, p); |
| 866 | if (error = namei(&nd)) |
| 867 | return (error); |
| 868 | vp = nd.ni_vp; |
| 869 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 870 | VOP_LOCK(vp); |
| 871 | if (vp->v_type == VDIR && |
| 872 | (error = suser(p->p_ucred, &p->p_acflag))) |
| 873 | goto out; |
| 874 | /* |
| 875 | * The root of a mounted filesystem cannot be deleted. |
| 876 | */ |
| 877 | if (vp->v_flag & VROOT) { |
| 878 | error = EBUSY; |
| 879 | goto out; |
| 880 | } |
| 881 | (void) vnode_pager_uncache(vp); |
| 882 | out: |
| 883 | if (!error) { |
| 884 | LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 885 | error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); |
| 886 | } else { |
| 887 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 888 | if (nd.ni_dvp == vp) |
| 889 | vrele(nd.ni_dvp); |
| 890 | else |
| 891 | vput(nd.ni_dvp); |
| 892 | vput(vp); |
| 893 | } |
| 894 | CHECKREFS("unlink"); |
| 895 | return (error); |
| 896 | } |
| 897 | |
| 898 | struct lseek_args { |
| 899 | int fdes; |
| 900 | int pad; |
| 901 | off_t off; |
| 902 | int sbase; |
| 903 | }; |
| 904 | |
| 905 | /* |
| 906 | * Seek system call. |
| 907 | */ |
| 908 | lseek(p, uap, retval) |
| 909 | struct proc *p; |
| 910 | register struct lseek_args *uap; |
| 911 | int *retval; |
| 912 | { |
| 913 | struct ucred *cred = p->p_ucred; |
| 914 | register struct filedesc *fdp = p->p_fd; |
| 915 | register struct file *fp; |
| 916 | struct vattr vattr; |
| 917 | int error; |
| 918 | |
| 919 | if ((unsigned)uap->fdes >= fdp->fd_nfiles || |
| 920 | (fp = fdp->fd_ofiles[uap->fdes]) == NULL) |
| 921 | return (EBADF); |
| 922 | if (fp->f_type != DTYPE_VNODE) |
| 923 | return (ESPIPE); |
| 924 | switch (uap->sbase) { |
| 925 | |
| 926 | case L_INCR: |
| 927 | fp->f_offset += uap->off; |
| 928 | break; |
| 929 | |
| 930 | case L_XTND: |
| 931 | if (error = VOP_GETATTR((struct vnode *)fp->f_data, |
| 932 | &vattr, cred, p)) |
| 933 | return (error); |
| 934 | fp->f_offset = uap->off + vattr.va_size; |
| 935 | break; |
| 936 | |
| 937 | case L_SET: |
| 938 | fp->f_offset = uap->off; |
| 939 | break; |
| 940 | |
| 941 | default: |
| 942 | return (EINVAL); |
| 943 | } |
| 944 | *(off_t *)retval = fp->f_offset; |
| 945 | return (0); |
| 946 | } |
| 947 | |
| 948 | #if defined(COMPAT_43) || defined(COMPAT_SUNOS) |
| 949 | /* |
| 950 | * Old lseek system call. |
| 951 | */ |
| 952 | struct olseek_args { |
| 953 | int fdes; |
| 954 | long off; |
| 955 | int sbase; |
| 956 | }; |
| 957 | olseek(p, uap, retval) |
| 958 | struct proc *p; |
| 959 | register struct olseek_args *uap; |
| 960 | int *retval; |
| 961 | { |
| 962 | struct lseek_args nuap; |
| 963 | off_t qret; |
| 964 | int error; |
| 965 | |
| 966 | nuap.fdes = uap->fdes; |
| 967 | nuap.off = uap->off; |
| 968 | nuap.sbase = uap->sbase; |
| 969 | error = lseek(p, &nuap, &qret); |
| 970 | *(long *)retval = qret; |
| 971 | return (error); |
| 972 | } |
| 973 | #endif /* COMPAT_43 */ |
| 974 | |
| 975 | /* |
| 976 | * Check access permissions. |
| 977 | */ |
| 978 | struct access_args { |
| 979 | char *fname; |
| 980 | int fmode; |
| 981 | }; |
| 982 | access(p, uap, retval) |
| 983 | struct proc *p; |
| 984 | register struct access_args *uap; |
| 985 | int *retval; |
| 986 | { |
| 987 | register struct ucred *cred = p->p_ucred; |
| 988 | register struct vnode *vp; |
| 989 | int error, mode, svuid, svgid; |
| 990 | struct nameidata nd; |
| 991 | |
| 992 | svuid = cred->cr_uid; |
| 993 | svgid = cred->cr_groups[0]; |
| 994 | cred->cr_uid = p->p_cred->p_ruid; |
| 995 | cred->cr_groups[0] = p->p_cred->p_rgid; |
| 996 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p); |
| 997 | if (error = namei(&nd)) |
| 998 | goto out1; |
| 999 | vp = nd.ni_vp; |
| 1000 | /* |
| 1001 | * fmode == 0 means only check for exist |
| 1002 | */ |
| 1003 | if (uap->fmode) { |
| 1004 | mode = 0; |
| 1005 | if (uap->fmode & R_OK) |
| 1006 | mode |= VREAD; |
| 1007 | if (uap->fmode & W_OK) |
| 1008 | mode |= VWRITE; |
| 1009 | if (uap->fmode & X_OK) |
| 1010 | mode |= VEXEC; |
| 1011 | if ((mode & VWRITE) == 0 || (error = vn_writechk(vp)) == 0) |
| 1012 | error = VOP_ACCESS(vp, mode, cred, p); |
| 1013 | } |
| 1014 | vput(vp); |
| 1015 | out1: |
| 1016 | cred->cr_uid = svuid; |
| 1017 | cred->cr_groups[0] = svgid; |
| 1018 | return (error); |
| 1019 | } |
| 1020 | |
| 1021 | #if defined(COMPAT_43) || defined(COMPAT_SUNOS) |
| 1022 | /* |
| 1023 | * Stat system call. |
| 1024 | * This version follows links. |
| 1025 | */ |
| 1026 | struct ostat_args { |
| 1027 | char *fname; |
| 1028 | struct ostat *ub; |
| 1029 | }; |
| 1030 | /* ARGSUSED */ |
| 1031 | ostat(p, uap, retval) |
| 1032 | struct proc *p; |
| 1033 | register struct ostat_args *uap; |
| 1034 | int *retval; |
| 1035 | { |
| 1036 | struct stat sb; |
| 1037 | struct ostat osb; |
| 1038 | int error; |
| 1039 | struct nameidata nd; |
| 1040 | |
| 1041 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p); |
| 1042 | if (error = namei(&nd)) |
| 1043 | return (error); |
| 1044 | error = vn_stat(nd.ni_vp, &sb, p); |
| 1045 | vput(nd.ni_vp); |
| 1046 | if (error) |
| 1047 | return (error); |
| 1048 | cvtstat(&sb, &osb); |
| 1049 | error = copyout((caddr_t)&osb, (caddr_t)uap->ub, sizeof (osb)); |
| 1050 | return (error); |
| 1051 | } |
| 1052 | |
| 1053 | /* |
| 1054 | * Lstat system call. |
| 1055 | * This version does not follow links. |
| 1056 | */ |
| 1057 | struct olstat_args { |
| 1058 | char *fname; |
| 1059 | struct ostat *ub; |
| 1060 | }; |
| 1061 | /* ARGSUSED */ |
| 1062 | olstat(p, uap, retval) |
| 1063 | struct proc *p; |
| 1064 | register struct olstat_args *uap; |
| 1065 | int *retval; |
| 1066 | { |
| 1067 | struct stat sb; |
| 1068 | struct ostat osb; |
| 1069 | int error; |
| 1070 | struct nameidata nd; |
| 1071 | |
| 1072 | NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p); |
| 1073 | if (error = namei(&nd)) |
| 1074 | return (error); |
| 1075 | error = vn_stat(nd.ni_vp, &sb, p); |
| 1076 | vput(nd.ni_vp); |
| 1077 | if (error) |
| 1078 | return (error); |
| 1079 | cvtstat(&sb, &osb); |
| 1080 | error = copyout((caddr_t)&osb, (caddr_t)uap->ub, sizeof (osb)); |
| 1081 | return (error); |
| 1082 | } |
| 1083 | |
| 1084 | /* |
| 1085 | * convert from an old to a new stat structure. |
| 1086 | */ |
| 1087 | cvtstat(st, ost) |
| 1088 | struct stat *st; |
| 1089 | struct ostat *ost; |
| 1090 | { |
| 1091 | |
| 1092 | ost->st_dev = st->st_dev; |
| 1093 | ost->st_ino = st->st_ino; |
| 1094 | ost->st_mode = st->st_mode; |
| 1095 | ost->st_nlink = st->st_nlink; |
| 1096 | ost->st_uid = st->st_uid; |
| 1097 | ost->st_gid = st->st_gid; |
| 1098 | ost->st_rdev = st->st_rdev; |
| 1099 | if (st->st_size < (quad_t)1 << 32) |
| 1100 | ost->st_size = st->st_size; |
| 1101 | else |
| 1102 | ost->st_size = -2; |
| 1103 | ost->st_atime = st->st_atime; |
| 1104 | ost->st_mtime = st->st_mtime; |
| 1105 | ost->st_ctime = st->st_ctime; |
| 1106 | ost->st_blksize = st->st_blksize; |
| 1107 | ost->st_blocks = st->st_blocks; |
| 1108 | ost->st_flags = st->st_flags; |
| 1109 | ost->st_gen = st->st_gen; |
| 1110 | } |
| 1111 | #endif /* COMPAT_43 || COMPAT_SUNOS */ |
| 1112 | |
| 1113 | /* |
| 1114 | * Stat system call. |
| 1115 | * This version follows links. |
| 1116 | */ |
| 1117 | struct stat_args { |
| 1118 | char *fname; |
| 1119 | struct stat *ub; |
| 1120 | }; |
| 1121 | /* ARGSUSED */ |
| 1122 | stat(p, uap, retval) |
| 1123 | struct proc *p; |
| 1124 | register struct stat_args *uap; |
| 1125 | int *retval; |
| 1126 | { |
| 1127 | struct stat sb; |
| 1128 | int error; |
| 1129 | struct nameidata nd; |
| 1130 | |
| 1131 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p); |
| 1132 | if (error = namei(&nd)) |
| 1133 | return (error); |
| 1134 | error = vn_stat(nd.ni_vp, &sb, p); |
| 1135 | vput(nd.ni_vp); |
| 1136 | if (error) |
| 1137 | return (error); |
| 1138 | error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb)); |
| 1139 | return (error); |
| 1140 | } |
| 1141 | |
| 1142 | /* |
| 1143 | * Lstat system call. |
| 1144 | * This version does not follow links. |
| 1145 | */ |
| 1146 | struct lstat_args { |
| 1147 | char *fname; |
| 1148 | struct stat *ub; |
| 1149 | }; |
| 1150 | /* ARGSUSED */ |
| 1151 | lstat(p, uap, retval) |
| 1152 | struct proc *p; |
| 1153 | register struct lstat_args *uap; |
| 1154 | int *retval; |
| 1155 | { |
| 1156 | int error; |
| 1157 | struct vnode *vp, *dvp; |
| 1158 | struct stat sb, sb1; |
| 1159 | struct nameidata nd; |
| 1160 | |
| 1161 | NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE, |
| 1162 | uap->fname, p); |
| 1163 | if (error = namei(&nd)) |
| 1164 | return (error); |
| 1165 | /* |
| 1166 | * For symbolic links, always return the attributes of its |
| 1167 | * containing directory, except for mode, size, and links. |
| 1168 | */ |
| 1169 | vp = nd.ni_vp; |
| 1170 | dvp = nd.ni_dvp; |
| 1171 | if (vp->v_type != VLNK) { |
| 1172 | if (dvp == vp) |
| 1173 | vrele(dvp); |
| 1174 | else |
| 1175 | vput(dvp); |
| 1176 | error = vn_stat(vp, &sb, p); |
| 1177 | vput(vp); |
| 1178 | if (error) |
| 1179 | return (error); |
| 1180 | } else { |
| 1181 | error = vn_stat(dvp, &sb, p); |
| 1182 | vput(dvp); |
| 1183 | if (error) { |
| 1184 | vput(vp); |
| 1185 | return (error); |
| 1186 | } |
| 1187 | error = vn_stat(vp, &sb1, p); |
| 1188 | vput(vp); |
| 1189 | if (error) |
| 1190 | return (error); |
| 1191 | sb.st_mode &= ~S_IFDIR; |
| 1192 | sb.st_mode |= S_IFLNK; |
| 1193 | sb.st_nlink = sb1.st_nlink; |
| 1194 | sb.st_size = sb1.st_size; |
| 1195 | sb.st_blocks = sb1.st_blocks; |
| 1196 | } |
| 1197 | error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb)); |
| 1198 | return (error); |
| 1199 | } |
| 1200 | |
| 1201 | /* |
| 1202 | * Pathconf system call. |
| 1203 | */ |
| 1204 | struct pathconf_args { |
| 1205 | char *fname; |
| 1206 | int name; |
| 1207 | }; |
| 1208 | /* ARGSUSED */ |
| 1209 | pathconf(p, uap, retval) |
| 1210 | struct proc *p; |
| 1211 | register struct pathconf_args *uap; |
| 1212 | int *retval; |
| 1213 | { |
| 1214 | int error; |
| 1215 | struct nameidata nd; |
| 1216 | |
| 1217 | NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p); |
| 1218 | if (error = namei(&nd)) |
| 1219 | return (error); |
| 1220 | error = VOP_PATHCONF(nd.ni_vp, uap->name, retval); |
| 1221 | vput(nd.ni_vp); |
| 1222 | return (error); |
| 1223 | } |
| 1224 | |
| 1225 | /* |
| 1226 | * Return target name of a symbolic link. |
| 1227 | */ |
| 1228 | struct readlink_args { |
| 1229 | char *name; |
| 1230 | char *buf; |
| 1231 | int count; |
| 1232 | }; |
| 1233 | /* ARGSUSED */ |
| 1234 | readlink(p, uap, retval) |
| 1235 | struct proc *p; |
| 1236 | register struct readlink_args *uap; |
| 1237 | int *retval; |
| 1238 | { |
| 1239 | register struct vnode *vp; |
| 1240 | struct iovec aiov; |
| 1241 | struct uio auio; |
| 1242 | int error; |
| 1243 | struct nameidata nd; |
| 1244 | |
| 1245 | CHECKPOINTREF; |
| 1246 | NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, uap->name, p); |
| 1247 | if (error = namei(&nd)) |
| 1248 | return (error); |
| 1249 | vp = nd.ni_vp; |
| 1250 | if (vp->v_type != VLNK) { |
| 1251 | error = EINVAL; |
| 1252 | goto out; |
| 1253 | } |
| 1254 | aiov.iov_base = uap->buf; |
| 1255 | aiov.iov_len = uap->count; |
| 1256 | auio.uio_iov = &aiov; |
| 1257 | auio.uio_iovcnt = 1; |
| 1258 | auio.uio_offset = 0; |
| 1259 | auio.uio_rw = UIO_READ; |
| 1260 | auio.uio_segflg = UIO_USERSPACE; |
| 1261 | auio.uio_procp = p; |
| 1262 | auio.uio_resid = uap->count; |
| 1263 | error = VOP_READLINK(vp, &auio, p->p_ucred); |
| 1264 | out: |
| 1265 | vput(vp); |
| 1266 | *retval = uap->count - auio.uio_resid; |
| 1267 | CHECKREFS("readlink"); |
| 1268 | return (error); |
| 1269 | } |
| 1270 | |
| 1271 | /* |
| 1272 | * Change flags of a file given path name. |
| 1273 | */ |
| 1274 | struct chflags_args { |
| 1275 | char *fname; |
| 1276 | int flags; |
| 1277 | }; |
| 1278 | /* ARGSUSED */ |
| 1279 | chflags(p, uap, retval) |
| 1280 | struct proc *p; |
| 1281 | register struct chflags_args *uap; |
| 1282 | int *retval; |
| 1283 | { |
| 1284 | register struct vnode *vp; |
| 1285 | struct vattr vattr; |
| 1286 | int error; |
| 1287 | struct nameidata nd; |
| 1288 | |
| 1289 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p); |
| 1290 | if (error = namei(&nd)) |
| 1291 | return (error); |
| 1292 | vp = nd.ni_vp; |
| 1293 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 1294 | VOP_LOCK(vp); |
| 1295 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 1296 | error = EROFS; |
| 1297 | goto out; |
| 1298 | } |
| 1299 | VATTR_NULL(&vattr); |
| 1300 | vattr.va_flags = uap->flags; |
| 1301 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1302 | out: |
| 1303 | vput(vp); |
| 1304 | return (error); |
| 1305 | } |
| 1306 | |
| 1307 | /* |
| 1308 | * Change flags of a file given a file descriptor. |
| 1309 | */ |
| 1310 | struct fchflags_args { |
| 1311 | int fd; |
| 1312 | int flags; |
| 1313 | }; |
| 1314 | /* ARGSUSED */ |
| 1315 | fchflags(p, uap, retval) |
| 1316 | struct proc *p; |
| 1317 | register struct fchflags_args *uap; |
| 1318 | int *retval; |
| 1319 | { |
| 1320 | struct vattr vattr; |
| 1321 | struct vnode *vp; |
| 1322 | struct file *fp; |
| 1323 | int error; |
| 1324 | |
| 1325 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1326 | return (error); |
| 1327 | vp = (struct vnode *)fp->f_data; |
| 1328 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 1329 | VOP_LOCK(vp); |
| 1330 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 1331 | error = EROFS; |
| 1332 | goto out; |
| 1333 | } |
| 1334 | VATTR_NULL(&vattr); |
| 1335 | vattr.va_flags = uap->flags; |
| 1336 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1337 | out: |
| 1338 | VOP_UNLOCK(vp); |
| 1339 | return (error); |
| 1340 | } |
| 1341 | |
| 1342 | /* |
| 1343 | * Change mode of a file given path name. |
| 1344 | */ |
| 1345 | struct chmod_args { |
| 1346 | char *fname; |
| 1347 | int fmode; |
| 1348 | }; |
| 1349 | /* ARGSUSED */ |
| 1350 | chmod(p, uap, retval) |
| 1351 | struct proc *p; |
| 1352 | register struct chmod_args *uap; |
| 1353 | int *retval; |
| 1354 | { |
| 1355 | register struct vnode *vp; |
| 1356 | struct vattr vattr; |
| 1357 | int error; |
| 1358 | struct nameidata nd; |
| 1359 | |
| 1360 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p); |
| 1361 | if (error = namei(&nd)) |
| 1362 | return (error); |
| 1363 | vp = nd.ni_vp; |
| 1364 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 1365 | VOP_LOCK(vp); |
| 1366 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 1367 | error = EROFS; |
| 1368 | goto out; |
| 1369 | } |
| 1370 | VATTR_NULL(&vattr); |
| 1371 | vattr.va_mode = uap->fmode & 07777; |
| 1372 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1373 | out: |
| 1374 | vput(vp); |
| 1375 | return (error); |
| 1376 | } |
| 1377 | |
| 1378 | /* |
| 1379 | * Change mode of a file given a file descriptor. |
| 1380 | */ |
| 1381 | struct fchmod_args { |
| 1382 | int fd; |
| 1383 | int fmode; |
| 1384 | }; |
| 1385 | /* ARGSUSED */ |
| 1386 | fchmod(p, uap, retval) |
| 1387 | struct proc *p; |
| 1388 | register struct fchmod_args *uap; |
| 1389 | int *retval; |
| 1390 | { |
| 1391 | struct vattr vattr; |
| 1392 | struct vnode *vp; |
| 1393 | struct file *fp; |
| 1394 | int error; |
| 1395 | |
| 1396 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1397 | return (error); |
| 1398 | vp = (struct vnode *)fp->f_data; |
| 1399 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 1400 | VOP_LOCK(vp); |
| 1401 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 1402 | error = EROFS; |
| 1403 | goto out; |
| 1404 | } |
| 1405 | VATTR_NULL(&vattr); |
| 1406 | vattr.va_mode = uap->fmode & 07777; |
| 1407 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1408 | out: |
| 1409 | VOP_UNLOCK(vp); |
| 1410 | return (error); |
| 1411 | } |
| 1412 | |
| 1413 | /* |
| 1414 | * Set ownership given a path name. |
| 1415 | */ |
| 1416 | struct chown_args { |
| 1417 | char *fname; |
| 1418 | int uid; |
| 1419 | int gid; |
| 1420 | }; |
| 1421 | /* ARGSUSED */ |
| 1422 | chown(p, uap, retval) |
| 1423 | struct proc *p; |
| 1424 | register struct chown_args *uap; |
| 1425 | int *retval; |
| 1426 | { |
| 1427 | register struct vnode *vp; |
| 1428 | struct vattr vattr; |
| 1429 | int error; |
| 1430 | struct nameidata nd; |
| 1431 | |
| 1432 | NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->fname, p); |
| 1433 | if (error = namei(&nd)) |
| 1434 | return (error); |
| 1435 | vp = nd.ni_vp; |
| 1436 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 1437 | VOP_LOCK(vp); |
| 1438 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 1439 | error = EROFS; |
| 1440 | goto out; |
| 1441 | } |
| 1442 | VATTR_NULL(&vattr); |
| 1443 | vattr.va_uid = uap->uid; |
| 1444 | vattr.va_gid = uap->gid; |
| 1445 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1446 | out: |
| 1447 | vput(vp); |
| 1448 | return (error); |
| 1449 | } |
| 1450 | |
| 1451 | /* |
| 1452 | * Set ownership given a file descriptor. |
| 1453 | */ |
| 1454 | struct fchown_args { |
| 1455 | int fd; |
| 1456 | int uid; |
| 1457 | int gid; |
| 1458 | }; |
| 1459 | /* ARGSUSED */ |
| 1460 | fchown(p, uap, retval) |
| 1461 | struct proc *p; |
| 1462 | register struct fchown_args *uap; |
| 1463 | int *retval; |
| 1464 | { |
| 1465 | struct vattr vattr; |
| 1466 | struct vnode *vp; |
| 1467 | struct file *fp; |
| 1468 | int error; |
| 1469 | |
| 1470 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1471 | return (error); |
| 1472 | vp = (struct vnode *)fp->f_data; |
| 1473 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 1474 | VOP_LOCK(vp); |
| 1475 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 1476 | error = EROFS; |
| 1477 | goto out; |
| 1478 | } |
| 1479 | VATTR_NULL(&vattr); |
| 1480 | vattr.va_uid = uap->uid; |
| 1481 | vattr.va_gid = uap->gid; |
| 1482 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1483 | out: |
| 1484 | VOP_UNLOCK(vp); |
| 1485 | return (error); |
| 1486 | } |
| 1487 | |
| 1488 | /* |
| 1489 | * Set the access and modification times of a file. |
| 1490 | */ |
| 1491 | struct utimes_args { |
| 1492 | char *fname; |
| 1493 | struct timeval *tptr; |
| 1494 | }; |
| 1495 | /* ARGSUSED */ |
| 1496 | utimes(p, uap, retval) |
| 1497 | struct proc *p; |
| 1498 | register struct utimes_args *uap; |
| 1499 | int *retval; |
| 1500 | { |
| 1501 | register struct vnode *vp; |
| 1502 | struct timeval tv[2]; |
| 1503 | struct vattr vattr; |
| 1504 | int error; |
| 1505 | struct nameidata nd; |
| 1506 | |
| 1507 | VATTR_NULL(&vattr); |
| 1508 | if (uap->tptr == NULL) { |
| 1509 | microtime(&tv[0]); |
| 1510 | tv[1] = tv[0]; |
| 1511 | vattr.va_vaflags |= VA_UTIMES_NULL; |
| 1512 | } else if (error = copyin((caddr_t)uap->tptr, (caddr_t)tv, sizeof (tv))) |
| 1513 | return (error); |
| 1514 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p); |
| 1515 | if (error = namei(&nd)) |
| 1516 | return (error); |
| 1517 | vp = nd.ni_vp; |
| 1518 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 1519 | VOP_LOCK(vp); |
| 1520 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 1521 | error = EROFS; |
| 1522 | goto out; |
| 1523 | } |
| 1524 | vattr.va_atime.ts_sec = tv[0].tv_sec; |
| 1525 | vattr.va_atime.ts_nsec = tv[0].tv_usec * 1000; |
| 1526 | vattr.va_mtime.ts_sec = tv[1].tv_sec; |
| 1527 | vattr.va_mtime.ts_nsec = tv[1].tv_usec * 1000; |
| 1528 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1529 | out: |
| 1530 | vput(vp); |
| 1531 | return (error); |
| 1532 | } |
| 1533 | |
| 1534 | struct truncate_args { |
| 1535 | char *fname; |
| 1536 | int pad; |
| 1537 | off_t length; |
| 1538 | }; |
| 1539 | |
| 1540 | /* |
| 1541 | * Truncate a file given its path name. |
| 1542 | */ |
| 1543 | /* ARGSUSED */ |
| 1544 | truncate(p, uap, retval) |
| 1545 | struct proc *p; |
| 1546 | register struct truncate_args *uap; |
| 1547 | int *retval; |
| 1548 | { |
| 1549 | register struct vnode *vp; |
| 1550 | struct vattr vattr; |
| 1551 | int error; |
| 1552 | struct nameidata nd; |
| 1553 | |
| 1554 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p); |
| 1555 | if (error = namei(&nd)) |
| 1556 | return (error); |
| 1557 | vp = nd.ni_vp; |
| 1558 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 1559 | VOP_LOCK(vp); |
| 1560 | if (vp->v_type == VDIR) { |
| 1561 | error = EISDIR; |
| 1562 | goto out; |
| 1563 | } |
| 1564 | if ((error = vn_writechk(vp)) || |
| 1565 | (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p))) |
| 1566 | goto out; |
| 1567 | VATTR_NULL(&vattr); |
| 1568 | vattr.va_size = uap->length; |
| 1569 | error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); |
| 1570 | out: |
| 1571 | vput(vp); |
| 1572 | return (error); |
| 1573 | } |
| 1574 | |
| 1575 | struct ftruncate_args { |
| 1576 | int fd; |
| 1577 | int pad; |
| 1578 | off_t length; |
| 1579 | }; |
| 1580 | |
| 1581 | /* |
| 1582 | * Truncate a file given a file descriptor. |
| 1583 | */ |
| 1584 | /* ARGSUSED */ |
| 1585 | ftruncate(p, uap, retval) |
| 1586 | struct proc *p; |
| 1587 | register struct ftruncate_args *uap; |
| 1588 | int *retval; |
| 1589 | { |
| 1590 | struct vattr vattr; |
| 1591 | struct vnode *vp; |
| 1592 | struct file *fp; |
| 1593 | int error; |
| 1594 | |
| 1595 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1596 | return (error); |
| 1597 | if ((fp->f_flag & FWRITE) == 0) |
| 1598 | return (EINVAL); |
| 1599 | vp = (struct vnode *)fp->f_data; |
| 1600 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 1601 | VOP_LOCK(vp); |
| 1602 | if (vp->v_type == VDIR) { |
| 1603 | error = EISDIR; |
| 1604 | goto out; |
| 1605 | } |
| 1606 | if (error = vn_writechk(vp)) |
| 1607 | goto out; |
| 1608 | VATTR_NULL(&vattr); |
| 1609 | vattr.va_size = uap->length; |
| 1610 | error = VOP_SETATTR(vp, &vattr, fp->f_cred, p); |
| 1611 | out: |
| 1612 | VOP_UNLOCK(vp); |
| 1613 | return (error); |
| 1614 | } |
| 1615 | |
| 1616 | #if defined(COMPAT_43) || defined(COMPAT_SUNOS) |
| 1617 | /* |
| 1618 | * Truncate a file given its path name. |
| 1619 | */ |
| 1620 | struct otruncate_args { |
| 1621 | char *fname; |
| 1622 | long length; |
| 1623 | }; |
| 1624 | /* ARGSUSED */ |
| 1625 | otruncate(p, uap, retval) |
| 1626 | struct proc *p; |
| 1627 | register struct otruncate_args *uap; |
| 1628 | int *retval; |
| 1629 | { |
| 1630 | struct truncate_args nuap; |
| 1631 | |
| 1632 | nuap.fname = uap->fname; |
| 1633 | nuap.length = uap->length; |
| 1634 | return (truncate(p, &nuap, retval)); |
| 1635 | } |
| 1636 | |
| 1637 | /* |
| 1638 | * Truncate a file given a file descriptor. |
| 1639 | */ |
| 1640 | struct oftruncate_args { |
| 1641 | int fd; |
| 1642 | long length; |
| 1643 | }; |
| 1644 | /* ARGSUSED */ |
| 1645 | oftruncate(p, uap, retval) |
| 1646 | struct proc *p; |
| 1647 | register struct oftruncate_args *uap; |
| 1648 | int *retval; |
| 1649 | { |
| 1650 | struct ftruncate_args nuap; |
| 1651 | |
| 1652 | nuap.fd = uap->fd; |
| 1653 | nuap.length = uap->length; |
| 1654 | return (ftruncate(p, &nuap, retval)); |
| 1655 | } |
| 1656 | #endif /* COMPAT_43 || COMPAT_SUNOS */ |
| 1657 | |
| 1658 | /* |
| 1659 | * Synch an open file. |
| 1660 | */ |
| 1661 | struct fsync_args { |
| 1662 | int fd; |
| 1663 | }; |
| 1664 | /* ARGSUSED */ |
| 1665 | fsync(p, uap, retval) |
| 1666 | struct proc *p; |
| 1667 | struct fsync_args *uap; |
| 1668 | int *retval; |
| 1669 | { |
| 1670 | register struct vnode *vp; |
| 1671 | struct file *fp; |
| 1672 | int error; |
| 1673 | |
| 1674 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1675 | return (error); |
| 1676 | vp = (struct vnode *)fp->f_data; |
| 1677 | VOP_LOCK(vp); |
| 1678 | error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p); |
| 1679 | VOP_UNLOCK(vp); |
| 1680 | return (error); |
| 1681 | } |
| 1682 | |
| 1683 | /* |
| 1684 | * Rename system call. |
| 1685 | * |
| 1686 | * Source and destination must either both be directories, or both |
| 1687 | * not be directories. If target is a directory, it must be empty. |
| 1688 | */ |
| 1689 | struct rename_args { |
| 1690 | char *from; |
| 1691 | char *to; |
| 1692 | }; |
| 1693 | /* ARGSUSED */ |
| 1694 | rename(p, uap, retval) |
| 1695 | struct proc *p; |
| 1696 | register struct rename_args *uap; |
| 1697 | int *retval; |
| 1698 | { |
| 1699 | register struct vnode *tvp, *fvp, *tdvp; |
| 1700 | struct nameidata fromnd, tond; |
| 1701 | int error; |
| 1702 | |
| 1703 | CHECKPOINTREF; |
| 1704 | NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE, |
| 1705 | uap->from, p); |
| 1706 | if (error = namei(&fromnd)) |
| 1707 | return (error); |
| 1708 | fvp = fromnd.ni_vp; |
| 1709 | NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART, |
| 1710 | UIO_USERSPACE, uap->to, p); |
| 1711 | if (error = namei(&tond)) { |
| 1712 | VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); |
| 1713 | vrele(fromnd.ni_dvp); |
| 1714 | vrele(fvp); |
| 1715 | goto out1; |
| 1716 | } |
| 1717 | tdvp = tond.ni_dvp; |
| 1718 | tvp = tond.ni_vp; |
| 1719 | if (tvp != NULL) { |
| 1720 | if (fvp->v_type == VDIR && tvp->v_type != VDIR) { |
| 1721 | error = ENOTDIR; |
| 1722 | goto out; |
| 1723 | } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { |
| 1724 | error = EISDIR; |
| 1725 | goto out; |
| 1726 | } |
| 1727 | } |
| 1728 | if (fvp == tdvp) |
| 1729 | error = EINVAL; |
| 1730 | /* |
| 1731 | * If source is the same as the destination (that is the |
| 1732 | * same inode number with the same name in the same directory), |
| 1733 | * then there is nothing to do. |
| 1734 | */ |
| 1735 | if (fvp == tvp && fromnd.ni_dvp == tdvp && |
| 1736 | fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && |
| 1737 | !bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, |
| 1738 | fromnd.ni_cnd.cn_namelen)) |
| 1739 | error = -1; |
| 1740 | out: |
| 1741 | if (!error) { |
| 1742 | LEASE_CHECK(tdvp, p, p->p_ucred, LEASE_WRITE); |
| 1743 | if (fromnd.ni_dvp != tdvp) |
| 1744 | LEASE_CHECK(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 1745 | if (tvp) |
| 1746 | LEASE_CHECK(tvp, p, p->p_ucred, LEASE_WRITE); |
| 1747 | error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, |
| 1748 | tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); |
| 1749 | } else { |
| 1750 | VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); |
| 1751 | if (tdvp == tvp) |
| 1752 | vrele(tdvp); |
| 1753 | else |
| 1754 | vput(tdvp); |
| 1755 | if (tvp) |
| 1756 | vput(tvp); |
| 1757 | VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); |
| 1758 | vrele(fromnd.ni_dvp); |
| 1759 | vrele(fvp); |
| 1760 | } |
| 1761 | p->p_spare[1]--; |
| 1762 | vrele(tond.ni_startdir); |
| 1763 | FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); |
| 1764 | out1: |
| 1765 | p->p_spare[1]--; |
| 1766 | vrele(fromnd.ni_startdir); |
| 1767 | FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); |
| 1768 | CHECKREFS("rename"); |
| 1769 | if (error == -1) |
| 1770 | return (0); |
| 1771 | return (error); |
| 1772 | } |
| 1773 | |
| 1774 | /* |
| 1775 | * Mkdir system call. |
| 1776 | */ |
| 1777 | struct mkdir_args { |
| 1778 | char *name; |
| 1779 | int dmode; |
| 1780 | }; |
| 1781 | /* ARGSUSED */ |
| 1782 | mkdir(p, uap, retval) |
| 1783 | struct proc *p; |
| 1784 | register struct mkdir_args *uap; |
| 1785 | int *retval; |
| 1786 | { |
| 1787 | register struct vnode *vp; |
| 1788 | struct vattr vattr; |
| 1789 | int error; |
| 1790 | struct nameidata nd; |
| 1791 | |
| 1792 | CHECKPOINTREF; |
| 1793 | NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->name, p); |
| 1794 | if (error = namei(&nd)) |
| 1795 | return (error); |
| 1796 | vp = nd.ni_vp; |
| 1797 | if (vp != NULL) { |
| 1798 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1799 | if (nd.ni_dvp == vp) |
| 1800 | vrele(nd.ni_dvp); |
| 1801 | else |
| 1802 | vput(nd.ni_dvp); |
| 1803 | vrele(vp); |
| 1804 | CHECKREFS("mkdir1"); |
| 1805 | return (EEXIST); |
| 1806 | } |
| 1807 | VATTR_NULL(&vattr); |
| 1808 | vattr.va_type = VDIR; |
| 1809 | vattr.va_mode = (uap->dmode & 0777) &~ p->p_fd->fd_cmask; |
| 1810 | LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 1811 | error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); |
| 1812 | if (!error) |
| 1813 | vput(nd.ni_vp); |
| 1814 | CHECKREFS("mkdir2"); |
| 1815 | return (error); |
| 1816 | } |
| 1817 | |
| 1818 | /* |
| 1819 | * Rmdir system call. |
| 1820 | */ |
| 1821 | struct rmdir_args { |
| 1822 | char *name; |
| 1823 | }; |
| 1824 | /* ARGSUSED */ |
| 1825 | rmdir(p, uap, retval) |
| 1826 | struct proc *p; |
| 1827 | struct rmdir_args *uap; |
| 1828 | int *retval; |
| 1829 | { |
| 1830 | register struct vnode *vp; |
| 1831 | int error; |
| 1832 | struct nameidata nd; |
| 1833 | |
| 1834 | CHECKPOINTREF; |
| 1835 | NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, uap->name, p); |
| 1836 | if (error = namei(&nd)) |
| 1837 | return (error); |
| 1838 | vp = nd.ni_vp; |
| 1839 | if (vp->v_type != VDIR) { |
| 1840 | error = ENOTDIR; |
| 1841 | goto out; |
| 1842 | } |
| 1843 | /* |
| 1844 | * No rmdir "." please. |
| 1845 | */ |
| 1846 | if (nd.ni_dvp == vp) { |
| 1847 | error = EINVAL; |
| 1848 | goto out; |
| 1849 | } |
| 1850 | /* |
| 1851 | * The root of a mounted filesystem cannot be deleted. |
| 1852 | */ |
| 1853 | if (vp->v_flag & VROOT) |
| 1854 | error = EBUSY; |
| 1855 | out: |
| 1856 | if (!error) { |
| 1857 | LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); |
| 1858 | LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE); |
| 1859 | error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); |
| 1860 | } else { |
| 1861 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1862 | if (nd.ni_dvp == vp) |
| 1863 | vrele(nd.ni_dvp); |
| 1864 | else |
| 1865 | vput(nd.ni_dvp); |
| 1866 | vput(vp); |
| 1867 | } |
| 1868 | CHECKREFS("rmdir"); |
| 1869 | return (error); |
| 1870 | } |
| 1871 | |
| 1872 | #ifdef COMPAT_43 |
| 1873 | /* |
| 1874 | * Read a block of directory entries in a file system independent format. |
| 1875 | */ |
| 1876 | struct ogetdirentries_args { |
| 1877 | int fd; |
| 1878 | char *buf; |
| 1879 | unsigned count; |
| 1880 | long *basep; |
| 1881 | }; |
| 1882 | ogetdirentries(p, uap, retval) |
| 1883 | struct proc *p; |
| 1884 | register struct ogetdirentries_args *uap; |
| 1885 | int *retval; |
| 1886 | { |
| 1887 | register struct vnode *vp; |
| 1888 | struct file *fp; |
| 1889 | struct uio auio, kuio; |
| 1890 | struct iovec aiov, kiov; |
| 1891 | struct dirent *dp, *edp; |
| 1892 | caddr_t dirbuf; |
| 1893 | int error, readcnt; |
| 1894 | long loff; |
| 1895 | |
| 1896 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1897 | return (error); |
| 1898 | if ((fp->f_flag & FREAD) == 0) |
| 1899 | return (EBADF); |
| 1900 | vp = (struct vnode *)fp->f_data; |
| 1901 | if (vp->v_type != VDIR) |
| 1902 | return (EINVAL); |
| 1903 | aiov.iov_base = uap->buf; |
| 1904 | aiov.iov_len = uap->count; |
| 1905 | auio.uio_iov = &aiov; |
| 1906 | auio.uio_iovcnt = 1; |
| 1907 | auio.uio_rw = UIO_READ; |
| 1908 | auio.uio_segflg = UIO_USERSPACE; |
| 1909 | auio.uio_procp = p; |
| 1910 | auio.uio_resid = uap->count; |
| 1911 | VOP_LOCK(vp); |
| 1912 | loff = auio.uio_offset = fp->f_offset; |
| 1913 | # if (BYTE_ORDER != LITTLE_ENDIAN) |
| 1914 | if (vp->v_mount->mnt_maxsymlinklen <= 0) { |
| 1915 | error = VOP_READDIR(vp, &auio, fp->f_cred); |
| 1916 | fp->f_offset = auio.uio_offset; |
| 1917 | } else |
| 1918 | # endif |
| 1919 | { |
| 1920 | kuio = auio; |
| 1921 | kuio.uio_iov = &kiov; |
| 1922 | kuio.uio_segflg = UIO_SYSSPACE; |
| 1923 | kiov.iov_len = uap->count; |
| 1924 | MALLOC(dirbuf, caddr_t, uap->count, M_TEMP, M_WAITOK); |
| 1925 | kiov.iov_base = dirbuf; |
| 1926 | error = VOP_READDIR(vp, &kuio, fp->f_cred); |
| 1927 | fp->f_offset = kuio.uio_offset; |
| 1928 | if (error == 0) { |
| 1929 | readcnt = uap->count - kuio.uio_resid; |
| 1930 | edp = (struct dirent *)&dirbuf[readcnt]; |
| 1931 | for (dp = (struct dirent *)dirbuf; dp < edp; ) { |
| 1932 | # if (BYTE_ORDER == LITTLE_ENDIAN) |
| 1933 | /* |
| 1934 | * The expected low byte of |
| 1935 | * dp->d_namlen is our dp->d_type. |
| 1936 | * The high MBZ byte of dp->d_namlen |
| 1937 | * is our dp->d_namlen. |
| 1938 | */ |
| 1939 | dp->d_type = dp->d_namlen; |
| 1940 | dp->d_namlen = 0; |
| 1941 | # else |
| 1942 | /* |
| 1943 | * The dp->d_type is the high byte |
| 1944 | * of the expected dp->d_namlen, |
| 1945 | * so must be zero'ed. |
| 1946 | */ |
| 1947 | dp->d_type = 0; |
| 1948 | # endif |
| 1949 | if (dp->d_reclen > 0) { |
| 1950 | dp = (struct dirent *) |
| 1951 | ((char *)dp + dp->d_reclen); |
| 1952 | } else { |
| 1953 | error = EIO; |
| 1954 | break; |
| 1955 | } |
| 1956 | } |
| 1957 | if (dp >= edp) |
| 1958 | error = uiomove(dirbuf, readcnt, &auio); |
| 1959 | } |
| 1960 | FREE(dirbuf, M_TEMP); |
| 1961 | } |
| 1962 | VOP_UNLOCK(vp); |
| 1963 | if (error) |
| 1964 | return (error); |
| 1965 | error = copyout((caddr_t)&loff, (caddr_t)uap->basep, sizeof(long)); |
| 1966 | *retval = uap->count - auio.uio_resid; |
| 1967 | return (error); |
| 1968 | } |
| 1969 | #endif |
| 1970 | |
| 1971 | /* |
| 1972 | * Read a block of directory entries in a file system independent format. |
| 1973 | */ |
| 1974 | struct getdirentries_args { |
| 1975 | int fd; |
| 1976 | char *buf; |
| 1977 | unsigned count; |
| 1978 | long *basep; |
| 1979 | }; |
| 1980 | getdirentries(p, uap, retval) |
| 1981 | struct proc *p; |
| 1982 | register struct getdirentries_args *uap; |
| 1983 | int *retval; |
| 1984 | { |
| 1985 | register struct vnode *vp; |
| 1986 | struct file *fp; |
| 1987 | struct uio auio; |
| 1988 | struct iovec aiov; |
| 1989 | long loff; |
| 1990 | int error; |
| 1991 | |
| 1992 | if (error = getvnode(p->p_fd, uap->fd, &fp)) |
| 1993 | return (error); |
| 1994 | if ((fp->f_flag & FREAD) == 0) |
| 1995 | return (EBADF); |
| 1996 | vp = (struct vnode *)fp->f_data; |
| 1997 | unionread: |
| 1998 | if (vp->v_type != VDIR) |
| 1999 | return (EINVAL); |
| 2000 | aiov.iov_base = uap->buf; |
| 2001 | aiov.iov_len = uap->count; |
| 2002 | auio.uio_iov = &aiov; |
| 2003 | auio.uio_iovcnt = 1; |
| 2004 | auio.uio_rw = UIO_READ; |
| 2005 | auio.uio_segflg = UIO_USERSPACE; |
| 2006 | auio.uio_procp = p; |
| 2007 | auio.uio_resid = uap->count; |
| 2008 | VOP_LOCK(vp); |
| 2009 | loff = auio.uio_offset = fp->f_offset; |
| 2010 | error = VOP_READDIR(vp, &auio, fp->f_cred); |
| 2011 | fp->f_offset = auio.uio_offset; |
| 2012 | VOP_UNLOCK(vp); |
| 2013 | if (error) |
| 2014 | return (error); |
| 2015 | if ((uap->count == auio.uio_resid) && |
| 2016 | (vp->v_flag & VROOT) && |
| 2017 | (vp->v_mount->mnt_flag & MNT_UNION)) { |
| 2018 | struct vnode *tvp = vp; |
| 2019 | vp = vp->v_mount->mnt_vnodecovered; |
| 2020 | VREF(vp); |
| 2021 | fp->f_data = (caddr_t) vp; |
| 2022 | fp->f_offset = 0; |
| 2023 | vrele(tvp); |
| 2024 | goto unionread; |
| 2025 | } |
| 2026 | error = copyout((caddr_t)&loff, (caddr_t)uap->basep, sizeof(long)); |
| 2027 | *retval = uap->count - auio.uio_resid; |
| 2028 | return (error); |
| 2029 | } |
| 2030 | |
| 2031 | /* |
| 2032 | * Set the mode mask for creation of filesystem nodes. |
| 2033 | */ |
| 2034 | struct umask_args { |
| 2035 | int mask; |
| 2036 | }; |
| 2037 | mode_t /* XXX */ |
| 2038 | umask(p, uap, retval) |
| 2039 | struct proc *p; |
| 2040 | struct umask_args *uap; |
| 2041 | int *retval; |
| 2042 | { |
| 2043 | register struct filedesc *fdp = p->p_fd; |
| 2044 | |
| 2045 | *retval = fdp->fd_cmask; |
| 2046 | fdp->fd_cmask = uap->mask & 07777; |
| 2047 | return (0); |
| 2048 | } |
| 2049 | |
| 2050 | /* |
| 2051 | * Void all references to file by ripping underlying filesystem |
| 2052 | * away from vnode. |
| 2053 | */ |
| 2054 | struct revoke_args { |
| 2055 | char *fname; |
| 2056 | }; |
| 2057 | /* ARGSUSED */ |
| 2058 | revoke(p, uap, retval) |
| 2059 | struct proc *p; |
| 2060 | register struct revoke_args *uap; |
| 2061 | int *retval; |
| 2062 | { |
| 2063 | register struct vnode *vp; |
| 2064 | struct vattr vattr; |
| 2065 | int error; |
| 2066 | struct nameidata nd; |
| 2067 | |
| 2068 | NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p); |
| 2069 | if (error = namei(&nd)) |
| 2070 | return (error); |
| 2071 | vp = nd.ni_vp; |
| 2072 | if (vp->v_type != VCHR && vp->v_type != VBLK) { |
| 2073 | error = EINVAL; |
| 2074 | goto out; |
| 2075 | } |
| 2076 | if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) |
| 2077 | goto out; |
| 2078 | if (p->p_ucred->cr_uid != vattr.va_uid && |
| 2079 | (error = suser(p->p_ucred, &p->p_acflag))) |
| 2080 | goto out; |
| 2081 | if (vp->v_usecount > 1 || (vp->v_flag & VALIASED)) |
| 2082 | vgoneall(vp); |
| 2083 | out: |
| 2084 | vrele(vp); |
| 2085 | return (error); |
| 2086 | } |
| 2087 | |
| 2088 | /* |
| 2089 | * Convert a user file descriptor to a kernel file entry. |
| 2090 | */ |
| 2091 | getvnode(fdp, fdes, fpp) |
| 2092 | struct filedesc *fdp; |
| 2093 | struct file **fpp; |
| 2094 | int fdes; |
| 2095 | { |
| 2096 | struct file *fp; |
| 2097 | |
| 2098 | if ((unsigned)fdes >= fdp->fd_nfiles || |
| 2099 | (fp = fdp->fd_ofiles[fdes]) == NULL) |
| 2100 | return (EBADF); |
| 2101 | if (fp->f_type != DTYPE_VNODE) |
| 2102 | return (EINVAL); |
| 2103 | *fpp = fp; |
| 2104 | return (0); |
| 2105 | } |