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95e5e988e0
original BSD code. The association between the vnode and the vm_object no longer includes reference counts. The major difference is that vm_object's are no longer freed gratuitiously from the vnode, and so once an object is created for the vnode, it will last as long as the vnode does. When a vnode object reference count is incremented, then the underlying vnode reference count is incremented also. The two "objects" are now more intimately related, and so the interactions are now much less complex. When vnodes are now normally placed onto the free queue with an object still attached. The rundown of the object happens at vnode rundown time, and happens with exactly the same filesystem semantics of the original VFS code. There is absolutely no need for vnode_pager_uncache and other travesties like that anymore. A side-effect of these changes is that SMP locking should be much simpler, the I/O copyin/copyout optimizations work, NFS should be more ponderable, and further work on layered filesystems should be less frustrating, because of the totally coherent management of the vnode objects and vnodes. Please be careful with your system while running this code, but I would greatly appreciate feedback as soon a reasonably possible.
2827 lines
61 KiB
C
2827 lines
61 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
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* $Id: vfs_syscalls.c,v 1.88 1997/12/29 00:22:50 dyson Exp $
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*/
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/* For 4.3 integer FS ID compatibility */
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#include "opt_compat.h"
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/*
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* XXX - The following is required because of some magic done
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* in getdirentries() below which is only done if the translucent
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* filesystem `UNION' is compiled into the kernel. This is broken,
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* but I don't have time to study the code deeply enough to understand
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* what's going on and determine an appropriate fix. -GAW
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*/
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#include "opt_union.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysent.h>
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#include <sys/sysproto.h>
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#include <sys/namei.h>
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#include <sys/filedesc.h>
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#include <sys/kernel.h>
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#include <sys/fcntl.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/unistd.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/dirent.h>
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#ifdef UNION
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#include <miscfs/union/union.h>
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#endif
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_zone.h>
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#include <sys/sysctl.h>
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static int change_dir __P((struct nameidata *ndp, struct proc *p));
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static void checkdirs __P((struct vnode *olddp));
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static int usermount = 0; /* if 1, non-root can mount fs. */
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SYSCTL_INT(_vfs, OID_AUTO, usermount, CTLFLAG_RW, &usermount, 0, "");
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/*
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* Virtual File System System Calls
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*/
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/*
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* Mount a file system.
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*/
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#ifndef _SYS_SYSPROTO_H_
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struct mount_args {
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char *type;
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char *path;
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int flags;
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caddr_t data;
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};
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#endif
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/* ARGSUSED */
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int
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mount(p, uap)
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struct proc *p;
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register struct mount_args /* {
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syscallarg(char *) type;
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syscallarg(char *) path;
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syscallarg(int) flags;
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syscallarg(caddr_t) data;
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} */ *uap;
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{
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struct vnode *vp;
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struct mount *mp;
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struct vfsconf *vfsp;
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int error, flag = 0, flag2 = 0;
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struct vattr va;
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u_long fstypenum;
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struct nameidata nd;
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char fstypename[MFSNAMELEN];
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if (usermount == 0 && (error = suser(p->p_ucred, &p->p_acflag)))
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return (error);
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/*
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* Get vnode to be covered
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*/
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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SCARG(uap, path), p);
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if (error = namei(&nd))
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return (error);
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vp = nd.ni_vp;
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if (SCARG(uap, flags) & MNT_UPDATE) {
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if ((vp->v_flag & VROOT) == 0) {
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vput(vp);
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return (EINVAL);
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}
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mp = vp->v_mount;
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flag = mp->mnt_flag;
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flag2 = mp->mnt_kern_flag;
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/*
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* We only allow the filesystem to be reloaded if it
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* is currently mounted read-only.
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*/
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if ((SCARG(uap, flags) & MNT_RELOAD) &&
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((mp->mnt_flag & MNT_RDONLY) == 0)) {
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vput(vp);
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return (EOPNOTSUPP); /* Needs translation */
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}
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mp->mnt_flag |=
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SCARG(uap, flags) & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE);
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/*
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* Only root, or the user that did the original mount is
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* permitted to update it.
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*/
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if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&
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(error = suser(p->p_ucred, &p->p_acflag))) {
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vput(vp);
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return (error);
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}
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/*
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* Do not allow NFS export by non-root users. Silently
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* enforce MNT_NOSUID and MNT_NODEV for non-root users.
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*/
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if (p->p_ucred->cr_uid != 0) {
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if (SCARG(uap, flags) & MNT_EXPORTED) {
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vput(vp);
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return (EPERM);
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}
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SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
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}
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if (vfs_busy(mp, LK_NOWAIT, 0, p)) {
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vput(vp);
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return (EBUSY);
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}
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VOP_UNLOCK(vp, 0, p);
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goto update;
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}
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/*
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* If the user is not root, ensure that they own the directory
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* onto which we are attempting to mount.
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*/
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if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) ||
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(va.va_uid != p->p_ucred->cr_uid &&
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(error = suser(p->p_ucred, &p->p_acflag)))) {
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vput(vp);
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return (error);
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}
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/*
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* Do not allow NFS export by non-root users. Silently
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* enforce MNT_NOSUID and MNT_NODEV for non-root users.
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*/
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if (p->p_ucred->cr_uid != 0) {
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if (SCARG(uap, flags) & MNT_EXPORTED) {
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vput(vp);
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return (EPERM);
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}
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SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
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}
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if (error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0))
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return (error);
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if (vp->v_type != VDIR) {
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vput(vp);
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return (ENOTDIR);
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}
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#ifdef COMPAT_43
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/*
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* Historically filesystem types were identified by number. If we
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* get an integer for the filesystem type instead of a string, we
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* check to see if it matches one of the historic filesystem types.
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*/
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fstypenum = (u_long)SCARG(uap, type);
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if (fstypenum < maxvfsconf) {
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for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
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if (vfsp->vfc_typenum == fstypenum)
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break;
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if (vfsp == NULL) {
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vput(vp);
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return (ENODEV);
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}
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strncpy(fstypename, vfsp->vfc_name, MFSNAMELEN);
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} else
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#endif /* COMPAT_43 */
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if (error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL)) {
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vput(vp);
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return (error);
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}
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for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
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if (!strcmp(vfsp->vfc_name, fstypename))
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break;
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if (vfsp == NULL) {
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vput(vp);
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return (ENODEV);
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}
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if (vp->v_mountedhere != NULL) {
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vput(vp);
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return (EBUSY);
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}
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/*
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* Allocate and initialize the filesystem.
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*/
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mp = (struct mount *)malloc((u_long)sizeof(struct mount),
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M_MOUNT, M_WAITOK);
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bzero((char *)mp, (u_long)sizeof(struct mount));
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lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0);
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(void)vfs_busy(mp, LK_NOWAIT, 0, p);
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mp->mnt_op = vfsp->vfc_vfsops;
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mp->mnt_vfc = vfsp;
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vfsp->vfc_refcount++;
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mp->mnt_stat.f_type = vfsp->vfc_typenum;
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mp->mnt_flag |= vfsp->vfc_flags & MNT_VISFLAGMASK;
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strncpy(mp->mnt_stat.f_fstypename, vfsp->vfc_name, MFSNAMELEN);
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vp->v_mountedhere = mp;
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mp->mnt_vnodecovered = vp;
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mp->mnt_stat.f_owner = p->p_ucred->cr_uid;
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update:
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/*
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* Set the mount level flags.
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*/
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if (SCARG(uap, flags) & MNT_RDONLY)
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mp->mnt_flag |= MNT_RDONLY;
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else if (mp->mnt_flag & MNT_RDONLY)
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mp->mnt_kern_flag |= MNTK_WANTRDWR;
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mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
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MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOATIME |
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MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
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mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |
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MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_FORCE |
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MNT_NOATIME | MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
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/*
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* Mount the filesystem.
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*/
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error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);
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if (mp->mnt_flag & MNT_UPDATE) {
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vrele(vp);
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if (mp->mnt_kern_flag & MNTK_WANTRDWR)
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mp->mnt_flag &= ~MNT_RDONLY;
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mp->mnt_flag &=~ (MNT_UPDATE | MNT_RELOAD | MNT_FORCE);
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mp->mnt_kern_flag &=~ MNTK_WANTRDWR;
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if (error) {
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mp->mnt_flag = flag;
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mp->mnt_kern_flag = flag2;
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}
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vfs_unbusy(mp, p);
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return (error);
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}
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/*
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* Put the new filesystem on the mount list after root.
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*/
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cache_purge(vp);
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if (!error) {
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simple_lock(&mountlist_slock);
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CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
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simple_unlock(&mountlist_slock);
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checkdirs(vp);
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VOP_UNLOCK(vp, 0, p);
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vfs_unbusy(mp, p);
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if (error = VFS_START(mp, 0, p))
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vrele(vp);
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} else {
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mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0;
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mp->mnt_vfc->vfc_refcount--;
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vfs_unbusy(mp, p);
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free((caddr_t)mp, M_MOUNT);
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vput(vp);
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}
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return (error);
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}
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/*
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* Scan all active processes to see if any of them have a current
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* or root directory onto which the new filesystem has just been
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* mounted. If so, replace them with the new mount point.
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*/
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static void
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checkdirs(olddp)
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struct vnode *olddp;
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{
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struct filedesc *fdp;
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struct vnode *newdp;
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struct proc *p;
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if (olddp->v_usecount == 1)
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return;
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if (VFS_ROOT(olddp->v_mountedhere, &newdp))
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panic("mount: lost mount");
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for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
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fdp = p->p_fd;
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if (fdp->fd_cdir == olddp) {
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vrele(fdp->fd_cdir);
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VREF(newdp);
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fdp->fd_cdir = newdp;
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}
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if (fdp->fd_rdir == olddp) {
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vrele(fdp->fd_rdir);
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VREF(newdp);
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fdp->fd_rdir = newdp;
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}
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}
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if (rootvnode == olddp) {
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vrele(rootvnode);
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VREF(newdp);
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rootvnode = newdp;
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}
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vput(newdp);
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}
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|
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/*
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* Unmount a file system.
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*
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* Note: unmount takes a path to the vnode mounted on as argument,
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* not special file (as before).
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*/
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#ifndef _SYS_SYSPROTO_H_
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struct unmount_args {
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char *path;
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int flags;
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};
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#endif
|
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/* ARGSUSED */
|
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int
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unmount(p, uap)
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struct proc *p;
|
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register struct unmount_args /* {
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syscallarg(char *) path;
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syscallarg(int) flags;
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} */ *uap;
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{
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register struct vnode *vp;
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|
struct mount *mp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
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SCARG(uap, path), p);
|
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if (error = namei(&nd))
|
|
return (error);
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vp = nd.ni_vp;
|
|
mp = vp->v_mount;
|
|
|
|
/*
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|
* Only root, or the user that did the original mount is
|
|
* permitted to unmount this filesystem.
|
|
*/
|
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if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) &&
|
|
(error = suser(p->p_ucred, &p->p_acflag))) {
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vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Don't allow unmounting the root file system.
|
|
*/
|
|
if (mp->mnt_flag & MNT_ROOTFS) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Must be the root of the filesystem
|
|
*/
|
|
if ((vp->v_flag & VROOT) == 0) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
vput(vp);
|
|
return (dounmount(mp, SCARG(uap, flags), p));
|
|
}
|
|
|
|
/*
|
|
* Do the actual file system unmount.
|
|
*/
|
|
int
|
|
dounmount(mp, flags, p)
|
|
register struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *coveredvp;
|
|
int error;
|
|
|
|
simple_lock(&mountlist_slock);
|
|
mp->mnt_kern_flag |= MNTK_UNMOUNT;
|
|
lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_slock, p);
|
|
|
|
if (mp->mnt_flag & MNT_EXPUBLIC)
|
|
vfs_setpublicfs(NULL, NULL, NULL);
|
|
|
|
vfs_msync(mp, MNT_WAIT);
|
|
mp->mnt_flag &=~ MNT_ASYNC;
|
|
cache_purgevfs(mp); /* remove cache entries for this file sys */
|
|
if (((mp->mnt_flag & MNT_RDONLY) ||
|
|
(error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0) ||
|
|
(flags & MNT_FORCE))
|
|
error = VFS_UNMOUNT(mp, flags, p);
|
|
simple_lock(&mountlist_slock);
|
|
if (error) {
|
|
mp->mnt_kern_flag &= ~MNTK_UNMOUNT;
|
|
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE,
|
|
&mountlist_slock, p);
|
|
return (error);
|
|
}
|
|
CIRCLEQ_REMOVE(&mountlist, mp, mnt_list);
|
|
if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) {
|
|
coveredvp->v_mountedhere = (struct mount *)0;
|
|
vrele(coveredvp);
|
|
}
|
|
mp->mnt_vfc->vfc_refcount--;
|
|
if (mp->mnt_vnodelist.lh_first != NULL)
|
|
panic("unmount: dangling vnode");
|
|
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock, p);
|
|
if (mp->mnt_kern_flag & MNTK_MWAIT)
|
|
wakeup((caddr_t)mp);
|
|
free((caddr_t)mp, M_MOUNT);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Sync each mounted filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct sync_args {
|
|
int dummy;
|
|
};
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
static int syncprt = 0;
|
|
SYSCTL_INT(_debug, OID_AUTO, syncprt, CTLFLAG_RW, &syncprt, 0, "");
|
|
#endif
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
sync(p, uap)
|
|
struct proc *p;
|
|
struct sync_args *uap;
|
|
{
|
|
register struct mount *mp, *nmp;
|
|
int asyncflag;
|
|
|
|
simple_lock(&mountlist_slock);
|
|
for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {
|
|
if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock, p)) {
|
|
nmp = mp->mnt_list.cqe_next;
|
|
continue;
|
|
}
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0) {
|
|
asyncflag = mp->mnt_flag & MNT_ASYNC;
|
|
mp->mnt_flag &= ~MNT_ASYNC;
|
|
vfs_msync(mp, MNT_NOWAIT);
|
|
VFS_SYNC(mp, MNT_NOWAIT, p != NULL ? p->p_ucred : NOCRED, p);
|
|
if (asyncflag)
|
|
mp->mnt_flag |= MNT_ASYNC;
|
|
}
|
|
simple_lock(&mountlist_slock);
|
|
nmp = mp->mnt_list.cqe_next;
|
|
vfs_unbusy(mp, p);
|
|
}
|
|
simple_unlock(&mountlist_slock);
|
|
#if 0
|
|
/*
|
|
* XXX don't call vfs_bufstats() yet because that routine
|
|
* was not imported in the Lite2 merge.
|
|
*/
|
|
#ifdef DIAGNOSTIC
|
|
if (syncprt)
|
|
vfs_bufstats();
|
|
#endif /* DIAGNOSTIC */
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change filesystem quotas.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct quotactl_args {
|
|
char *path;
|
|
int cmd;
|
|
int uid;
|
|
caddr_t arg;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
quotactl(p, uap)
|
|
struct proc *p;
|
|
register struct quotactl_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) cmd;
|
|
syscallarg(int) uid;
|
|
syscallarg(caddr_t) arg;
|
|
} */ *uap;
|
|
{
|
|
register struct mount *mp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
mp = nd.ni_vp->v_mount;
|
|
vrele(nd.ni_vp);
|
|
return (VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),
|
|
SCARG(uap, arg), p));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct statfs_args {
|
|
char *path;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
statfs(p, uap)
|
|
struct proc *p;
|
|
register struct statfs_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct statfs *) buf;
|
|
} */ *uap;
|
|
{
|
|
register struct mount *mp;
|
|
register struct statfs *sp;
|
|
int error;
|
|
struct nameidata nd;
|
|
struct statfs sb;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
mp = nd.ni_vp->v_mount;
|
|
sp = &mp->mnt_stat;
|
|
vrele(nd.ni_vp);
|
|
error = VFS_STATFS(mp, sp, p);
|
|
if (error)
|
|
return (error);
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
if (p->p_ucred->cr_uid != 0) {
|
|
bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));
|
|
sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
|
|
sp = &sb;
|
|
}
|
|
return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));
|
|
}
|
|
|
|
/*
|
|
* Get filesystem statistics.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fstatfs_args {
|
|
int fd;
|
|
struct statfs *buf;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fstatfs(p, uap)
|
|
struct proc *p;
|
|
register struct fstatfs_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(struct statfs *) buf;
|
|
} */ *uap;
|
|
{
|
|
struct file *fp;
|
|
struct mount *mp;
|
|
register struct statfs *sp;
|
|
int error;
|
|
struct statfs sb;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
mp = ((struct vnode *)fp->f_data)->v_mount;
|
|
sp = &mp->mnt_stat;
|
|
error = VFS_STATFS(mp, sp, p);
|
|
if (error)
|
|
return (error);
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
if (p->p_ucred->cr_uid != 0) {
|
|
bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));
|
|
sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
|
|
sp = &sb;
|
|
}
|
|
return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));
|
|
}
|
|
|
|
/*
|
|
* Get statistics on all filesystems.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getfsstat_args {
|
|
struct statfs *buf;
|
|
long bufsize;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
getfsstat(p, uap)
|
|
struct proc *p;
|
|
register struct getfsstat_args /* {
|
|
syscallarg(struct statfs *) buf;
|
|
syscallarg(long) bufsize;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
register struct mount *mp, *nmp;
|
|
register struct statfs *sp;
|
|
caddr_t sfsp;
|
|
long count, maxcount, error;
|
|
|
|
maxcount = SCARG(uap, bufsize) / sizeof(struct statfs);
|
|
sfsp = (caddr_t)SCARG(uap, buf);
|
|
count = 0;
|
|
simple_lock(&mountlist_slock);
|
|
for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {
|
|
if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock, p)) {
|
|
nmp = mp->mnt_list.cqe_next;
|
|
continue;
|
|
}
|
|
if (sfsp && count < maxcount) {
|
|
sp = &mp->mnt_stat;
|
|
/*
|
|
* If MNT_NOWAIT is specified, do not refresh the
|
|
* fsstat cache. MNT_WAIT overrides MNT_NOWAIT.
|
|
*/
|
|
if (((SCARG(uap, flags) & MNT_NOWAIT) == 0 ||
|
|
(SCARG(uap, flags) & MNT_WAIT)) &&
|
|
(error = VFS_STATFS(mp, sp, p))) {
|
|
simple_lock(&mountlist_slock);
|
|
nmp = mp->mnt_list.cqe_next;
|
|
vfs_unbusy(mp, p);
|
|
continue;
|
|
}
|
|
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
|
|
error = copyout((caddr_t)sp, sfsp, sizeof(*sp));
|
|
if (error) {
|
|
vfs_unbusy(mp, p);
|
|
return (error);
|
|
}
|
|
sfsp += sizeof(*sp);
|
|
}
|
|
count++;
|
|
simple_lock(&mountlist_slock);
|
|
nmp = mp->mnt_list.cqe_next;
|
|
vfs_unbusy(mp, p);
|
|
}
|
|
simple_unlock(&mountlist_slock);
|
|
if (sfsp && count > maxcount)
|
|
p->p_retval[0] = maxcount;
|
|
else
|
|
p->p_retval[0] = count;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory to a given file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchdir_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchdir(p, uap)
|
|
struct proc *p;
|
|
struct fchdir_args /* {
|
|
syscallarg(int) fd;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
struct vnode *vp, *tdp;
|
|
struct mount *mp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (error = getvnode(fdp, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VREF(vp);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
|
|
while (!error && (mp = vp->v_mountedhere) != NULL) {
|
|
if (vfs_busy(mp, 0, 0, p))
|
|
continue;
|
|
error = VFS_ROOT(mp, &tdp);
|
|
vfs_unbusy(mp, p);
|
|
if (error)
|
|
break;
|
|
vput(vp);
|
|
vp = tdp;
|
|
}
|
|
if (error) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(vp, 0, p);
|
|
vrele(fdp->fd_cdir);
|
|
fdp->fd_cdir = vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change current working directory (``.'').
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chdir(p, uap)
|
|
struct proc *p;
|
|
struct chdir_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = change_dir(&nd, p))
|
|
return (error);
|
|
vrele(fdp->fd_cdir);
|
|
fdp->fd_cdir = nd.ni_vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change notion of root (``/'') directory.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chroot_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chroot(p, uap)
|
|
struct proc *p;
|
|
struct chroot_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = change_dir(&nd, p))
|
|
return (error);
|
|
if (fdp->fd_rdir != NULL)
|
|
vrele(fdp->fd_rdir);
|
|
fdp->fd_rdir = nd.ni_vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Common routine for chroot and chdir.
|
|
*/
|
|
static int
|
|
change_dir(ndp, p)
|
|
register struct nameidata *ndp;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
error = namei(ndp);
|
|
if (error)
|
|
return (error);
|
|
vp = ndp->ni_vp;
|
|
if (vp->v_type != VDIR)
|
|
error = ENOTDIR;
|
|
else
|
|
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
|
|
if (error)
|
|
vput(vp);
|
|
else
|
|
VOP_UNLOCK(vp, 0, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check permissions, allocate an open file structure,
|
|
* and call the device open routine if any.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct open_args {
|
|
char *path;
|
|
int flags;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
open(p, uap)
|
|
struct proc *p;
|
|
register struct open_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = p->p_fd;
|
|
register struct file *fp;
|
|
register struct vnode *vp;
|
|
int cmode, flags, oflags;
|
|
struct file *nfp;
|
|
int type, indx, error;
|
|
struct flock lf;
|
|
struct nameidata nd;
|
|
|
|
oflags = SCARG(uap, flags);
|
|
if ((oflags & O_ACCMODE) == O_ACCMODE)
|
|
return (EINVAL);
|
|
flags = FFLAGS(oflags);
|
|
error = falloc(p, &nfp, &indx);
|
|
if (error)
|
|
return (error);
|
|
fp = nfp;
|
|
cmode = ((SCARG(uap, mode) &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
p->p_dupfd = -indx - 1; /* XXX check for fdopen */
|
|
error = vn_open(&nd, flags, cmode);
|
|
if (error) {
|
|
ffree(fp);
|
|
if ((error == ENODEV || error == ENXIO) &&
|
|
p->p_dupfd >= 0 && /* XXX from fdopen */
|
|
(error =
|
|
dupfdopen(fdp, indx, p->p_dupfd, flags, error)) == 0) {
|
|
p->p_retval[0] = indx;
|
|
return (0);
|
|
}
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
fdp->fd_ofiles[indx] = NULL;
|
|
return (error);
|
|
}
|
|
p->p_dupfd = 0;
|
|
vp = nd.ni_vp;
|
|
|
|
fp->f_flag = flags & FMASK;
|
|
fp->f_type = (vp->v_type == VFIFO ? DTYPE_FIFO : DTYPE_VNODE);
|
|
fp->f_ops = &vnops;
|
|
fp->f_data = (caddr_t)vp;
|
|
if (flags & (O_EXLOCK | O_SHLOCK)) {
|
|
lf.l_whence = SEEK_SET;
|
|
lf.l_start = 0;
|
|
lf.l_len = 0;
|
|
if (flags & O_EXLOCK)
|
|
lf.l_type = F_WRLCK;
|
|
else
|
|
lf.l_type = F_RDLCK;
|
|
type = F_FLOCK;
|
|
if ((flags & FNONBLOCK) == 0)
|
|
type |= F_WAIT;
|
|
VOP_UNLOCK(vp, 0, p);
|
|
if (error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) {
|
|
(void) vn_close(vp, fp->f_flag, fp->f_cred, p);
|
|
ffree(fp);
|
|
fdp->fd_ofiles[indx] = NULL;
|
|
return (error);
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
fp->f_flag |= FHASLOCK;
|
|
}
|
|
if ((vp->v_type == VREG) && (vp->v_object == NULL))
|
|
vfs_object_create(vp, p, p->p_ucred, TRUE);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
p->p_retval[0] = indx;
|
|
return (0);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Create a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ocreat_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
int
|
|
ocreat(p, uap)
|
|
struct proc *p;
|
|
register struct ocreat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
struct open_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(int) mode;
|
|
} */ nuap;
|
|
|
|
SCARG(&nuap, path) = SCARG(uap, path);
|
|
SCARG(&nuap, mode) = SCARG(uap, mode);
|
|
SCARG(&nuap, flags) = O_WRONLY | O_CREAT | O_TRUNC;
|
|
return (open(p, &nuap));
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Create a special file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mknod_args {
|
|
char *path;
|
|
int mode;
|
|
int dev;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mknod(p, uap)
|
|
struct proc *p;
|
|
register struct mknod_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
syscallarg(int) dev;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
int whiteout;
|
|
struct nameidata nd;
|
|
|
|
error = suser(p->p_ucred, &p->p_acflag);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL)
|
|
error = EEXIST;
|
|
else {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;
|
|
vattr.va_rdev = SCARG(uap, dev);
|
|
whiteout = 0;
|
|
|
|
switch (SCARG(uap, mode) & S_IFMT) {
|
|
case S_IFMT: /* used by badsect to flag bad sectors */
|
|
vattr.va_type = VBAD;
|
|
break;
|
|
case S_IFCHR:
|
|
vattr.va_type = VCHR;
|
|
break;
|
|
case S_IFBLK:
|
|
vattr.va_type = VBLK;
|
|
break;
|
|
case S_IFWHT:
|
|
whiteout = 1;
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
if (!error) {
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
if (whiteout) {
|
|
error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE);
|
|
if (error)
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
vput(nd.ni_dvp);
|
|
} else {
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp,
|
|
&nd.ni_cnd, &vattr);
|
|
}
|
|
} else {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (vp)
|
|
vrele(vp);
|
|
}
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "mknod");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "mknod");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Create a named pipe.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkfifo_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mkfifo(p, uap)
|
|
struct proc *p;
|
|
register struct mkfifo_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
if (nd.ni_vp != NULL) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
return (EEXIST);
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VFIFO;
|
|
vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
return (VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr));
|
|
}
|
|
|
|
/*
|
|
* Make a hard file link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct link_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
link(p, uap)
|
|
struct proc *p;
|
|
register struct link_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) link;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW|NOOBJ, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type == VDIR)
|
|
error = EPERM; /* POSIX */
|
|
else {
|
|
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), p);
|
|
error = namei(&nd);
|
|
if (!error) {
|
|
if (nd.ni_vp != NULL) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
error = EEXIST;
|
|
} else {
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred,
|
|
LEASE_WRITE);
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
}
|
|
}
|
|
}
|
|
vrele(vp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "link");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "link");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct symlink_args {
|
|
char *path;
|
|
char *link;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
symlink(p, uap)
|
|
struct proc *p;
|
|
register struct symlink_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) link;
|
|
} */ *uap;
|
|
{
|
|
struct vattr vattr;
|
|
char *path;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
path = zalloc(namei_zone);
|
|
if (error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL))
|
|
goto out;
|
|
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), p);
|
|
if (error = namei(&nd))
|
|
goto out;
|
|
if (nd.ni_vp) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(nd.ni_vp);
|
|
error = EEXIST;
|
|
goto out;
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = ACCESSPERMS &~ p->p_fd->fd_cmask;
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "symlink");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "symlink");
|
|
out:
|
|
zfree(namei_zone, path);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a whiteout from the filesystem.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
undelete(p, uap)
|
|
struct proc *p;
|
|
register struct undelete_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
error = namei(&nd);
|
|
if (error)
|
|
return (error);
|
|
|
|
if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (nd.ni_vp)
|
|
vrele(nd.ni_vp);
|
|
return (EEXIST);
|
|
}
|
|
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
if (error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE))
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
vput(nd.ni_dvp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "undelete");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "undelete");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete a name from the filesystem.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unlink_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
unlink(p, uap)
|
|
struct proc *p;
|
|
struct unlink_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
|
|
if (vp->v_type == VDIR)
|
|
error = EPERM; /* POSIX */
|
|
else {
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*
|
|
* XXX: can this only be a VDIR case?
|
|
*/
|
|
if (vp->v_flag & VROOT)
|
|
error = EBUSY;
|
|
}
|
|
|
|
if (!error) {
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd);
|
|
} else {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
if (vp != NULLVP)
|
|
vput(vp);
|
|
}
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "unlink");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "unlink");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Reposition read/write file offset.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lseek_args {
|
|
int fd;
|
|
int pad;
|
|
off_t offset;
|
|
int whence;
|
|
};
|
|
#endif
|
|
int
|
|
lseek(p, uap)
|
|
struct proc *p;
|
|
register struct lseek_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) offset;
|
|
syscallarg(int) whence;
|
|
} */ *uap;
|
|
{
|
|
struct ucred *cred = p->p_ucred;
|
|
register struct filedesc *fdp = p->p_fd;
|
|
register struct file *fp;
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
if ((u_int)SCARG(uap, fd) >= fdp->fd_nfiles ||
|
|
(fp = fdp->fd_ofiles[SCARG(uap, fd)]) == NULL)
|
|
return (EBADF);
|
|
if (fp->f_type != DTYPE_VNODE)
|
|
return (ESPIPE);
|
|
switch (SCARG(uap, whence)) {
|
|
case L_INCR:
|
|
fp->f_offset += SCARG(uap, offset);
|
|
break;
|
|
case L_XTND:
|
|
error=VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p);
|
|
if (error)
|
|
return (error);
|
|
fp->f_offset = SCARG(uap, offset) + vattr.va_size;
|
|
break;
|
|
case L_SET:
|
|
fp->f_offset = SCARG(uap, offset);
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
*(off_t *)(p->p_retval) = fp->f_offset;
|
|
return (0);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
/*
|
|
* Reposition read/write file offset.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct olseek_args {
|
|
int fd;
|
|
long offset;
|
|
int whence;
|
|
};
|
|
#endif
|
|
int
|
|
olseek(p, uap)
|
|
struct proc *p;
|
|
register struct olseek_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(long) offset;
|
|
syscallarg(int) whence;
|
|
} */ *uap;
|
|
{
|
|
struct lseek_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) offset;
|
|
syscallarg(int) whence;
|
|
} */ nuap;
|
|
int error;
|
|
|
|
SCARG(&nuap, fd) = SCARG(uap, fd);
|
|
SCARG(&nuap, offset) = SCARG(uap, offset);
|
|
SCARG(&nuap, whence) = SCARG(uap, whence);
|
|
error = lseek(p, &nuap);
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Check access permissions.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct access_args {
|
|
char *path;
|
|
int flags;
|
|
};
|
|
#endif
|
|
int
|
|
access(p, uap)
|
|
struct proc *p;
|
|
register struct access_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
register struct ucred *cred = p->p_ucred;
|
|
register struct vnode *vp;
|
|
int error, flags, t_gid, t_uid;
|
|
struct nameidata nd;
|
|
|
|
t_uid = cred->cr_uid;
|
|
t_gid = cred->cr_groups[0];
|
|
cred->cr_uid = p->p_cred->p_ruid;
|
|
cred->cr_groups[0] = p->p_cred->p_rgid;
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
goto out1;
|
|
vp = nd.ni_vp;
|
|
|
|
/* Flags == 0 means only check for existence. */
|
|
if (SCARG(uap, flags)) {
|
|
flags = 0;
|
|
if (SCARG(uap, flags) & R_OK)
|
|
flags |= VREAD;
|
|
if (SCARG(uap, flags) & W_OK)
|
|
flags |= VWRITE;
|
|
if (SCARG(uap, flags) & X_OK)
|
|
flags |= VEXEC;
|
|
if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
|
|
error = VOP_ACCESS(vp, flags, cred, p);
|
|
}
|
|
vput(vp);
|
|
out1:
|
|
cred->cr_uid = t_uid;
|
|
cred->cr_groups[0] = t_gid;
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ostat_args {
|
|
char *path;
|
|
struct ostat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
ostat(p, uap)
|
|
struct proc *p;
|
|
register struct ostat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct ostat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, p);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
error = copyout((caddr_t)&osb, (caddr_t)SCARG(uap, ub), sizeof (osb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct olstat_args {
|
|
char *path;
|
|
struct ostat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
olstat(p, uap)
|
|
struct proc *p;
|
|
register struct olstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct ostat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct stat sb;
|
|
struct ostat osb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = vn_stat(vp, &sb, p);
|
|
if (vp->v_type == VLNK)
|
|
sb.st_mode |= S_IFLNK | ACCESSPERMS; /* 0777 */
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
cvtstat(&sb, &osb);
|
|
error = copyout((caddr_t)&osb, (caddr_t)SCARG(uap, ub), sizeof (osb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert from an old to a new stat structure.
|
|
*/
|
|
void
|
|
cvtstat(st, ost)
|
|
struct stat *st;
|
|
struct ostat *ost;
|
|
{
|
|
|
|
ost->st_dev = st->st_dev;
|
|
ost->st_ino = st->st_ino;
|
|
ost->st_mode = st->st_mode;
|
|
ost->st_nlink = st->st_nlink;
|
|
ost->st_uid = st->st_uid;
|
|
ost->st_gid = st->st_gid;
|
|
ost->st_rdev = st->st_rdev;
|
|
if (st->st_size < (quad_t)1 << 32)
|
|
ost->st_size = st->st_size;
|
|
else
|
|
ost->st_size = -2;
|
|
ost->st_atime = st->st_atime;
|
|
ost->st_mtime = st->st_mtime;
|
|
ost->st_ctime = st->st_ctime;
|
|
ost->st_blksize = st->st_blksize;
|
|
ost->st_blocks = st->st_blocks;
|
|
ost->st_flags = st->st_flags;
|
|
ost->st_gen = st->st_gen;
|
|
}
|
|
#endif /* COMPAT_43 || COMPAT_SUNOS */
|
|
|
|
/*
|
|
* Get file status; this version follows links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct stat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
stat(p, uap)
|
|
struct proc *p;
|
|
register struct stat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct stat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, p);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get file status; this version does not follow links.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lstat_args {
|
|
char *path;
|
|
struct stat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
lstat(p, uap)
|
|
struct proc *p;
|
|
register struct lstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct stat *) ub;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct vnode *vp;
|
|
struct stat sb;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = vn_stat(vp, &sb, p);
|
|
if (vp->v_type == VLNK)
|
|
sb.st_mode |= S_IFLNK | ACCESSPERMS; /* 0777 */
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get configurable pathname variables.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct pathconf_args {
|
|
char *path;
|
|
int name;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
pathconf(p, uap)
|
|
struct proc *p;
|
|
register struct pathconf_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) name;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), p->p_retval);
|
|
vput(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return target name of a symbolic link.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct readlink_args {
|
|
char *path;
|
|
char *buf;
|
|
int count;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
readlink(p, uap)
|
|
struct proc *p;
|
|
register struct readlink_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(char *) buf;
|
|
syscallarg(int) count;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct iovec aiov;
|
|
struct uio auio;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VLNK)
|
|
error = EINVAL;
|
|
else {
|
|
aiov.iov_base = SCARG(uap, buf);
|
|
aiov.iov_len = SCARG(uap, count);
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_procp = p;
|
|
auio.uio_resid = SCARG(uap, count);
|
|
error = VOP_READLINK(vp, &auio, p->p_ucred);
|
|
}
|
|
vput(vp);
|
|
p->p_retval[0] = SCARG(uap, count) - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chflags_args {
|
|
char *path;
|
|
int flags;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chflags(p, uap)
|
|
struct proc *p;
|
|
register struct chflags_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = SCARG(uap, flags);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change flags of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchflags_args {
|
|
int fd;
|
|
int flags;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchflags(p, uap)
|
|
struct proc *p;
|
|
register struct fchflags_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = SCARG(uap, flags);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chmod_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chmod(p, uap)
|
|
struct proc *p;
|
|
register struct chmod_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = SCARG(uap, mode) & ALLPERMS;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchmod_args {
|
|
int fd;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchmod(p, uap)
|
|
struct proc *p;
|
|
register struct fchmod_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = SCARG(uap, mode) & ALLPERMS;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct chown_args {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
chown(p, uap)
|
|
struct proc *p;
|
|
register struct chown_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) uid;
|
|
syscallarg(int) gid;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = SCARG(uap, uid);
|
|
vattr.va_gid = SCARG(uap, gid);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a path name, do not cross symlinks.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lchown_args {
|
|
char *path;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
lchown(p, uap)
|
|
struct proc *p;
|
|
register struct lchown_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) uid;
|
|
syscallarg(int) gid;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = SCARG(uap, uid);
|
|
vattr.va_gid = SCARG(uap, gid);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set ownership given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fchown_args {
|
|
int fd;
|
|
int uid;
|
|
int gid;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fchown(p, uap)
|
|
struct proc *p;
|
|
register struct fchown_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) uid;
|
|
syscallarg(int) gid;
|
|
} */ *uap;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = SCARG(uap, uid);
|
|
vattr.va_gid = SCARG(uap, gid);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct utimes_args {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
utimes(p, uap)
|
|
struct proc *p;
|
|
register struct utimes_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct timeval *) tptr;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct timeval tv[2];
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
VATTR_NULL(&vattr);
|
|
if (SCARG(uap, tptr) == NULL) {
|
|
microtime(&tv[0]);
|
|
tv[1] = tv[0];
|
|
vattr.va_vaflags |= VA_UTIMES_NULL;
|
|
} else if (error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,
|
|
sizeof (tv)))
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
vattr.va_atime.tv_sec = tv[0].tv_sec;
|
|
vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000;
|
|
vattr.va_mtime.tv_sec = tv[1].tv_sec;
|
|
vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct truncate_args {
|
|
char *path;
|
|
int pad;
|
|
off_t length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
truncate(p, uap)
|
|
struct proc *p;
|
|
register struct truncate_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
if (uap->length < 0)
|
|
return(EINVAL);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
else if ((error = vn_writechk(vp)) == 0 &&
|
|
(error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = SCARG(uap, length);
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
}
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ftruncate_args {
|
|
int fd;
|
|
int pad;
|
|
off_t length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
ftruncate(p, uap)
|
|
struct proc *p;
|
|
register struct ftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ *uap;
|
|
{
|
|
struct vattr vattr;
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (uap->length < 0)
|
|
return(EINVAL);
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
if ((fp->f_flag & FWRITE) == 0)
|
|
return (EINVAL);
|
|
vp = (struct vnode *)fp->f_data;
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
if (vp->v_type == VDIR)
|
|
error = EISDIR;
|
|
else if ((error = vn_writechk(vp)) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_size = SCARG(uap, length);
|
|
error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);
|
|
}
|
|
VOP_UNLOCK(vp, 0, p);
|
|
return (error);
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
/*
|
|
* Truncate a file given its path name.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct otruncate_args {
|
|
char *path;
|
|
long length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
otruncate(p, uap)
|
|
struct proc *p;
|
|
register struct otruncate_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(long) length;
|
|
} */ *uap;
|
|
{
|
|
struct truncate_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ nuap;
|
|
|
|
SCARG(&nuap, path) = SCARG(uap, path);
|
|
SCARG(&nuap, length) = SCARG(uap, length);
|
|
return (truncate(p, &nuap));
|
|
}
|
|
|
|
/*
|
|
* Truncate a file given a file descriptor.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct oftruncate_args {
|
|
int fd;
|
|
long length;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
oftruncate(p, uap)
|
|
struct proc *p;
|
|
register struct oftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(long) length;
|
|
} */ *uap;
|
|
{
|
|
struct ftruncate_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) pad;
|
|
syscallarg(off_t) length;
|
|
} */ nuap;
|
|
|
|
SCARG(&nuap, fd) = SCARG(uap, fd);
|
|
SCARG(&nuap, length) = SCARG(uap, length);
|
|
return (ftruncate(p, &nuap));
|
|
}
|
|
#endif /* COMPAT_43 || COMPAT_SUNOS */
|
|
|
|
/*
|
|
* Sync an open file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct fsync_args {
|
|
int fd;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
fsync(p, uap)
|
|
struct proc *p;
|
|
struct fsync_args /* {
|
|
syscallarg(int) fd;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
vn_lock(vp, LK_EXCLUSIVE, p);
|
|
if (vp->v_object) {
|
|
vm_object_page_clean(vp->v_object, 0, 0 ,0);
|
|
}
|
|
error = VOP_FSYNC(vp, fp->f_cred,
|
|
(vp->v_mount && (vp->v_mount->mnt_flag & MNT_ASYNC)) ?
|
|
MNT_NOWAIT : MNT_WAIT, p);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Rename files. Source and destination must either both be directories,
|
|
* or both not be directories. If target is a directory, it must be empty.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rename_args {
|
|
char *from;
|
|
char *to;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
rename(p, uap)
|
|
struct proc *p;
|
|
register struct rename_args /* {
|
|
syscallarg(char *) from;
|
|
syscallarg(char *) to;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *tvp, *fvp, *tdvp;
|
|
struct nameidata fromnd, tond;
|
|
int error;
|
|
|
|
NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,
|
|
SCARG(uap, from), p);
|
|
if (error = namei(&fromnd))
|
|
return (error);
|
|
fvp = fromnd.ni_vp;
|
|
NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART | NOOBJ,
|
|
UIO_USERSPACE, SCARG(uap, to), p);
|
|
if (fromnd.ni_vp->v_type == VDIR)
|
|
tond.ni_cnd.cn_flags |= WILLBEDIR;
|
|
if (error = namei(&tond)) {
|
|
/* Translate error code for rename("dir1", "dir2/."). */
|
|
if (error == EISDIR && fvp->v_type == VDIR)
|
|
error = EINVAL;
|
|
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
goto out1;
|
|
}
|
|
tdvp = tond.ni_dvp;
|
|
tvp = tond.ni_vp;
|
|
if (tvp != NULL) {
|
|
if (fvp->v_type == VDIR && tvp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
goto out;
|
|
} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {
|
|
error = EISDIR;
|
|
goto out;
|
|
}
|
|
}
|
|
if (fvp == tdvp)
|
|
error = EINVAL;
|
|
/*
|
|
* If source is the same as the destination (that is the
|
|
* same inode number with the same name in the same directory),
|
|
* then there is nothing to do.
|
|
*/
|
|
if (fvp == tvp && fromnd.ni_dvp == tdvp &&
|
|
fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&
|
|
!bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr,
|
|
fromnd.ni_cnd.cn_namelen))
|
|
error = -1;
|
|
out:
|
|
if (!error) {
|
|
VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE);
|
|
if (fromnd.ni_dvp != tdvp) {
|
|
VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
}
|
|
if (tvp) {
|
|
VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE);
|
|
}
|
|
error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,
|
|
tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);
|
|
} else {
|
|
VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
if (tvp)
|
|
vput(tvp);
|
|
VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);
|
|
vrele(fromnd.ni_dvp);
|
|
vrele(fvp);
|
|
}
|
|
vrele(tond.ni_startdir);
|
|
ASSERT_VOP_UNLOCKED(fromnd.ni_dvp, "rename");
|
|
ASSERT_VOP_UNLOCKED(fromnd.ni_vp, "rename");
|
|
ASSERT_VOP_UNLOCKED(tond.ni_dvp, "rename");
|
|
ASSERT_VOP_UNLOCKED(tond.ni_vp, "rename");
|
|
zfree(namei_zone, tond.ni_cnd.cn_pnbuf);
|
|
out1:
|
|
if (fromnd.ni_startdir)
|
|
vrele(fromnd.ni_startdir);
|
|
zfree(namei_zone, fromnd.ni_cnd.cn_pnbuf);
|
|
if (error == -1)
|
|
return (0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Make a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mkdir_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mkdir(p, uap)
|
|
struct proc *p;
|
|
register struct mkdir_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
nd.ni_cnd.cn_flags |= WILLBEDIR;
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp != NULL) {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vrele(vp);
|
|
return (EEXIST);
|
|
}
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_type = VDIR;
|
|
vattr.va_mode = (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_fd->fd_cmask;
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
if (!error)
|
|
vput(nd.ni_vp);
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "mkdir");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "mkdir");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remove a directory file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct rmdir_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
rmdir(p, uap)
|
|
struct proc *p;
|
|
struct rmdir_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
goto out;
|
|
}
|
|
/*
|
|
* No rmdir "." please.
|
|
*/
|
|
if (nd.ni_dvp == vp) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
/*
|
|
* The root of a mounted filesystem cannot be deleted.
|
|
*/
|
|
if (vp->v_flag & VROOT)
|
|
error = EBUSY;
|
|
out:
|
|
if (!error) {
|
|
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
|
|
} else {
|
|
VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
|
|
if (nd.ni_dvp == vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
vput(vp);
|
|
}
|
|
ASSERT_VOP_UNLOCKED(nd.ni_dvp, "rmdir");
|
|
ASSERT_VOP_UNLOCKED(nd.ni_vp, "rmdir");
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Read a block of directory entries in a file system independent format.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct ogetdirentries_args {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
};
|
|
#endif
|
|
int
|
|
ogetdirentries(p, uap)
|
|
struct proc *p;
|
|
register struct ogetdirentries_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(u_int) count;
|
|
syscallarg(long *) basep;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio, kuio;
|
|
struct iovec aiov, kiov;
|
|
struct dirent *dp, *edp;
|
|
caddr_t dirbuf;
|
|
int error, eofflag, readcnt;
|
|
long loff;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0)
|
|
return (EBADF);
|
|
vp = (struct vnode *)fp->f_data;
|
|
unionread:
|
|
if (vp->v_type != VDIR)
|
|
return (EINVAL);
|
|
aiov.iov_base = SCARG(uap, buf);
|
|
aiov.iov_len = SCARG(uap, count);
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_procp = p;
|
|
auio.uio_resid = SCARG(uap, count);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
loff = auio.uio_offset = fp->f_offset;
|
|
# if (BYTE_ORDER != LITTLE_ENDIAN)
|
|
if (vp->v_mount->mnt_maxsymlinklen <= 0) {
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag,
|
|
NULL, NULL);
|
|
fp->f_offset = auio.uio_offset;
|
|
} else
|
|
# endif
|
|
{
|
|
kuio = auio;
|
|
kuio.uio_iov = &kiov;
|
|
kuio.uio_segflg = UIO_SYSSPACE;
|
|
kiov.iov_len = SCARG(uap, count);
|
|
MALLOC(dirbuf, caddr_t, SCARG(uap, count), M_TEMP, M_WAITOK);
|
|
kiov.iov_base = dirbuf;
|
|
error = VOP_READDIR(vp, &kuio, fp->f_cred, &eofflag,
|
|
NULL, NULL);
|
|
fp->f_offset = kuio.uio_offset;
|
|
if (error == 0) {
|
|
readcnt = SCARG(uap, count) - kuio.uio_resid;
|
|
edp = (struct dirent *)&dirbuf[readcnt];
|
|
for (dp = (struct dirent *)dirbuf; dp < edp; ) {
|
|
# if (BYTE_ORDER == LITTLE_ENDIAN)
|
|
/*
|
|
* The expected low byte of
|
|
* dp->d_namlen is our dp->d_type.
|
|
* The high MBZ byte of dp->d_namlen
|
|
* is our dp->d_namlen.
|
|
*/
|
|
dp->d_type = dp->d_namlen;
|
|
dp->d_namlen = 0;
|
|
# else
|
|
/*
|
|
* The dp->d_type is the high byte
|
|
* of the expected dp->d_namlen,
|
|
* so must be zero'ed.
|
|
*/
|
|
dp->d_type = 0;
|
|
# endif
|
|
if (dp->d_reclen > 0) {
|
|
dp = (struct dirent *)
|
|
((char *)dp + dp->d_reclen);
|
|
} else {
|
|
error = EIO;
|
|
break;
|
|
}
|
|
}
|
|
if (dp >= edp)
|
|
error = uiomove(dirbuf, readcnt, &auio);
|
|
}
|
|
FREE(dirbuf, M_TEMP);
|
|
}
|
|
VOP_UNLOCK(vp, 0, p);
|
|
if (error)
|
|
return (error);
|
|
|
|
#ifdef UNION
|
|
{
|
|
if ((SCARG(uap, count) == auio.uio_resid) &&
|
|
(vp->v_op == union_vnodeop_p)) {
|
|
struct vnode *lvp;
|
|
|
|
lvp = union_dircache(vp, p);
|
|
if (lvp != NULLVP) {
|
|
struct vattr va;
|
|
|
|
/*
|
|
* If the directory is opaque,
|
|
* then don't show lower entries
|
|
*/
|
|
error = VOP_GETATTR(vp, &va, fp->f_cred, p);
|
|
if (va.va_flags & OPAQUE) {
|
|
vput(lvp);
|
|
lvp = NULL;
|
|
}
|
|
}
|
|
|
|
if (lvp != NULLVP) {
|
|
error = VOP_OPEN(lvp, FREAD, fp->f_cred, p);
|
|
if (error) {
|
|
vput(lvp);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(lvp, 0, p);
|
|
fp->f_data = (caddr_t) lvp;
|
|
fp->f_offset = 0;
|
|
error = vn_close(vp, FREAD, fp->f_cred, p);
|
|
if (error)
|
|
return (error);
|
|
vp = lvp;
|
|
goto unionread;
|
|
}
|
|
}
|
|
}
|
|
#endif /* UNION */
|
|
|
|
if ((SCARG(uap, count) == auio.uio_resid) &&
|
|
(vp->v_flag & VROOT) &&
|
|
(vp->v_mount->mnt_flag & MNT_UNION)) {
|
|
struct vnode *tvp = vp;
|
|
vp = vp->v_mount->mnt_vnodecovered;
|
|
VREF(vp);
|
|
fp->f_data = (caddr_t) vp;
|
|
fp->f_offset = 0;
|
|
vrele(tvp);
|
|
goto unionread;
|
|
}
|
|
error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),
|
|
sizeof(long));
|
|
p->p_retval[0] = SCARG(uap, count) - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
#endif /* COMPAT_43 */
|
|
|
|
/*
|
|
* Read a block of directory entries in a file system independent format.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getdirentries_args {
|
|
int fd;
|
|
char *buf;
|
|
u_int count;
|
|
long *basep;
|
|
};
|
|
#endif
|
|
int
|
|
getdirentries(p, uap)
|
|
struct proc *p;
|
|
register struct getdirentries_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(u_int) count;
|
|
syscallarg(long *) basep;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
long loff;
|
|
int error, eofflag;
|
|
|
|
if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))
|
|
return (error);
|
|
if ((fp->f_flag & FREAD) == 0)
|
|
return (EBADF);
|
|
vp = (struct vnode *)fp->f_data;
|
|
unionread:
|
|
if (vp->v_type != VDIR)
|
|
return (EINVAL);
|
|
aiov.iov_base = SCARG(uap, buf);
|
|
aiov.iov_len = SCARG(uap, count);
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_procp = p;
|
|
auio.uio_resid = SCARG(uap, count);
|
|
/* vn_lock(vp, LK_SHARED | LK_RETRY, p); */
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
loff = auio.uio_offset = fp->f_offset;
|
|
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, NULL, NULL);
|
|
fp->f_offset = auio.uio_offset;
|
|
VOP_UNLOCK(vp, 0, p);
|
|
if (error)
|
|
return (error);
|
|
|
|
#ifdef UNION
|
|
{
|
|
if ((SCARG(uap, count) == auio.uio_resid) &&
|
|
(vp->v_op == union_vnodeop_p)) {
|
|
struct vnode *lvp;
|
|
|
|
lvp = union_dircache(vp, p);
|
|
if (lvp != NULLVP) {
|
|
struct vattr va;
|
|
|
|
/*
|
|
* If the directory is opaque,
|
|
* then don't show lower entries
|
|
*/
|
|
error = VOP_GETATTR(vp, &va, fp->f_cred, p);
|
|
if (va.va_flags & OPAQUE) {
|
|
vput(lvp);
|
|
lvp = NULL;
|
|
}
|
|
}
|
|
|
|
if (lvp != NULLVP) {
|
|
error = VOP_OPEN(lvp, FREAD, fp->f_cred, p);
|
|
if (error) {
|
|
vput(lvp);
|
|
return (error);
|
|
}
|
|
VOP_UNLOCK(lvp, 0, p);
|
|
fp->f_data = (caddr_t) lvp;
|
|
fp->f_offset = 0;
|
|
error = vn_close(vp, FREAD, fp->f_cred, p);
|
|
if (error)
|
|
return (error);
|
|
vp = lvp;
|
|
goto unionread;
|
|
}
|
|
}
|
|
}
|
|
#endif /* UNION */
|
|
|
|
if ((SCARG(uap, count) == auio.uio_resid) &&
|
|
(vp->v_flag & VROOT) &&
|
|
(vp->v_mount->mnt_flag & MNT_UNION)) {
|
|
struct vnode *tvp = vp;
|
|
vp = vp->v_mount->mnt_vnodecovered;
|
|
VREF(vp);
|
|
fp->f_data = (caddr_t) vp;
|
|
fp->f_offset = 0;
|
|
vrele(tvp);
|
|
goto unionread;
|
|
}
|
|
error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),
|
|
sizeof(long));
|
|
p->p_retval[0] = SCARG(uap, count) - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the mode mask for creation of filesystem nodes.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct umask_args {
|
|
int newmask;
|
|
};
|
|
#endif
|
|
int
|
|
umask(p, uap)
|
|
struct proc *p;
|
|
struct umask_args /* {
|
|
syscallarg(int) newmask;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp;
|
|
|
|
fdp = p->p_fd;
|
|
p->p_retval[0] = fdp->fd_cmask;
|
|
fdp->fd_cmask = SCARG(uap, newmask) & ALLPERMS;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Void all references to file by ripping underlying filesystem
|
|
* away from vnode.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct revoke_args {
|
|
char *path;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
revoke(p, uap)
|
|
struct proc *p;
|
|
register struct revoke_args /* {
|
|
syscallarg(char *) path;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct vattr vattr;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if (error = namei(&nd))
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))
|
|
goto out;
|
|
if (p->p_ucred->cr_uid != vattr.va_uid &&
|
|
(error = suser(p->p_ucred, &p->p_acflag)))
|
|
goto out;
|
|
if (vp->v_usecount > 1 || (vp->v_flag & VALIASED))
|
|
VOP_REVOKE(vp, REVOKEALL);
|
|
out:
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Convert a user file descriptor to a kernel file entry.
|
|
*/
|
|
int
|
|
getvnode(fdp, fd, fpp)
|
|
struct filedesc *fdp;
|
|
int fd;
|
|
struct file **fpp;
|
|
{
|
|
struct file *fp;
|
|
|
|
if ((u_int)fd >= fdp->fd_nfiles ||
|
|
(fp = fdp->fd_ofiles[fd]) == NULL)
|
|
return (EBADF);
|
|
if (fp->f_type != DTYPE_VNODE && fp->f_type != DTYPE_FIFO)
|
|
return (EINVAL);
|
|
*fpp = fp;
|
|
return (0);
|
|
}
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct __getcwd_args {
|
|
u_char *buf;
|
|
u_int buflen;
|
|
};
|
|
#endif
|
|
#define STATNODE(mode, name, var) \
|
|
SYSCTL_INT(_vfs_cache, OID_AUTO, name, mode, var, 0, "");
|
|
|
|
static int disablecwd;
|
|
SYSCTL_INT(_debug, OID_AUTO, disablecwd, CTLFLAG_RW, &disablecwd, 0, "");
|
|
|
|
static u_long numcwdcalls; STATNODE(CTLFLAG_RD, numcwdcalls, &numcwdcalls);
|
|
static u_long numcwdfail1; STATNODE(CTLFLAG_RD, numcwdfail1, &numcwdfail1);
|
|
static u_long numcwdfail2; STATNODE(CTLFLAG_RD, numcwdfail2, &numcwdfail2);
|
|
static u_long numcwdfail3; STATNODE(CTLFLAG_RD, numcwdfail3, &numcwdfail3);
|
|
static u_long numcwdfail4; STATNODE(CTLFLAG_RD, numcwdfail4, &numcwdfail4);
|
|
static u_long numcwdfound; STATNODE(CTLFLAG_RD, numcwdfound, &numcwdfound);
|
|
int
|
|
__getcwd(p, uap)
|
|
struct proc *p;
|
|
struct __getcwd_args *uap;
|
|
{
|
|
char *bp, *buf;
|
|
int error, i, slash_prefixed;
|
|
struct filedesc *fdp;
|
|
struct namecache *ncp;
|
|
struct vnode *vp;
|
|
|
|
numcwdcalls++;
|
|
if (disablecwd)
|
|
return (ENODEV);
|
|
if (uap->buflen < 2)
|
|
return (EINVAL);
|
|
if (uap->buflen > MAXPATHLEN)
|
|
uap->buflen = MAXPATHLEN;
|
|
buf = bp = malloc(uap->buflen, M_TEMP, M_WAITOK);
|
|
bp += uap->buflen - 1;
|
|
*bp = '\0';
|
|
fdp = p->p_fd;
|
|
slash_prefixed = 0;
|
|
for (vp = fdp->fd_cdir; vp != fdp->fd_rdir && vp != rootvnode;) {
|
|
if (vp->v_flag & VROOT) {
|
|
vp = vp->v_mount->mnt_vnodecovered;
|
|
continue;
|
|
}
|
|
if (vp->v_dd->v_id != vp->v_ddid) {
|
|
numcwdfail1++;
|
|
free(buf, M_TEMP);
|
|
return (ENOTDIR);
|
|
}
|
|
ncp = TAILQ_FIRST(&vp->v_cache_dst);
|
|
if (!ncp) {
|
|
numcwdfail2++;
|
|
free(buf, M_TEMP);
|
|
return (ENOENT);
|
|
}
|
|
if (ncp->nc_dvp != vp->v_dd) {
|
|
numcwdfail3++;
|
|
free(buf, M_TEMP);
|
|
return (EBADF);
|
|
}
|
|
for (i = ncp->nc_nlen - 1; i >= 0; i--) {
|
|
if (bp == buf) {
|
|
numcwdfail4++;
|
|
free(buf, M_TEMP);
|
|
return (ENOMEM);
|
|
}
|
|
*--bp = ncp->nc_name[i];
|
|
}
|
|
if (bp == buf) {
|
|
numcwdfail4++;
|
|
free(buf, M_TEMP);
|
|
return (ENOMEM);
|
|
}
|
|
*--bp = '/';
|
|
slash_prefixed = 1;
|
|
vp = vp->v_dd;
|
|
}
|
|
if (!slash_prefixed) {
|
|
if (bp == buf) {
|
|
numcwdfail4++;
|
|
free(buf, M_TEMP);
|
|
return (ENOMEM);
|
|
}
|
|
*--bp = '/';
|
|
}
|
|
numcwdfound++;
|
|
error = copyout(bp, uap->buf, strlen(bp) + 1);
|
|
free(buf, M_TEMP);
|
|
return (error);
|
|
}
|