4f2a0d4f96
by utimes(path, NULL). This gives them the same precision as the timestamps produced by write operations. Do likewise for lutimes() and futimes(). Suggested by bde.
3132 lines
67 KiB
C
3132 lines
67 KiB
C
/*
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
* (c) UNIX System Laboratories, Inc.
|
|
* All or some portions of this file are derived from material licensed
|
|
* to the University of California by American Telephone and Telegraph
|
|
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
|
|
* the permission of UNIX System Laboratories, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
|
|
* $Id: vfs_syscalls.c,v 1.130 1999/08/12 20:38:32 alfred Exp $
|
|
*/
|
|
|
|
/* For 4.3 integer FS ID compatibility */
|
|
#include "opt_compat.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/file.h>
|
|
#include <sys/linker.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/unistd.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/dirent.h>
|
|
|
|
#include <miscfs/union/union.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_extern.h>
|
|
#include <vm/vm_zone.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
static int change_dir __P((struct nameidata *ndp, struct proc *p));
|
|
static void checkdirs __P((struct vnode *olddp));
|
|
static int chroot_refuse_vdir_fds __P((struct filedesc *fdp));
|
|
static int getutimes __P((const struct timeval *, struct timespec *));
|
|
static int setfown __P((struct proc *, struct vnode *, uid_t, gid_t));
|
|
static int setfmode __P((struct proc *, struct vnode *, int));
|
|
static int setfflags __P((struct proc *, struct vnode *, int));
|
|
static int setutimes __P((struct proc *, struct vnode *,
|
|
const struct timespec *, int));
|
|
static int usermount = 0; /* if 1, non-root can mount fs. */
|
|
|
|
int (*union_dircheckp) __P((struct proc *, struct vnode **, struct file *));
|
|
|
|
SYSCTL_INT(_vfs, OID_AUTO, usermount, CTLFLAG_RW, &usermount, 0, "");
|
|
|
|
/*
|
|
* Virtual File System System Calls
|
|
*/
|
|
|
|
/*
|
|
* Mount a file system.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct mount_args {
|
|
char *type;
|
|
char *path;
|
|
int flags;
|
|
caddr_t data;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
mount(p, uap)
|
|
struct proc *p;
|
|
register struct mount_args /* {
|
|
syscallarg(char *) type;
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
syscallarg(caddr_t) data;
|
|
} */ *uap;
|
|
{
|
|
struct vnode *vp;
|
|
struct mount *mp;
|
|
struct vfsconf *vfsp;
|
|
int error, flag = 0, flag2 = 0;
|
|
struct vattr va;
|
|
#ifdef COMPAT_43
|
|
u_long fstypenum;
|
|
#endif
|
|
struct nameidata nd;
|
|
char fstypename[MFSNAMELEN];
|
|
|
|
if (usermount == 0 && (error = suser(p)))
|
|
return (error);
|
|
/*
|
|
* Do not allow NFS export by non-root users.
|
|
*/
|
|
if (SCARG(uap, flags) & MNT_EXPORTED) {
|
|
error = suser(p);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
/*
|
|
* Silently enforce MNT_NOSUID and MNT_NODEV for non-root users
|
|
*/
|
|
if (suser_xxx(p->p_ucred, 0, 0))
|
|
SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;
|
|
/*
|
|
* Get vnode to be covered
|
|
*/
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (SCARG(uap, flags) & MNT_UPDATE) {
|
|
if ((vp->v_flag & VROOT) == 0) {
|
|
vput(vp);
|
|
return (EINVAL);
|
|
}
|
|
mp = vp->v_mount;
|
|
flag = mp->mnt_flag;
|
|
flag2 = mp->mnt_kern_flag;
|
|
/*
|
|
* We only allow the filesystem to be reloaded if it
|
|
* is currently mounted read-only.
|
|
*/
|
|
if ((SCARG(uap, flags) & MNT_RELOAD) &&
|
|
((mp->mnt_flag & MNT_RDONLY) == 0)) {
|
|
vput(vp);
|
|
return (EOPNOTSUPP); /* Needs translation */
|
|
}
|
|
mp->mnt_flag |=
|
|
SCARG(uap, flags) & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE);
|
|
/*
|
|
* Only root, or the user that did the original mount is
|
|
* permitted to update it.
|
|
*/
|
|
if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&
|
|
(error = suser(p))) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
if (vfs_busy(mp, LK_NOWAIT, 0, p)) {
|
|
vput(vp);
|
|
return (EBUSY);
|
|
}
|
|
VOP_UNLOCK(vp, 0, p);
|
|
goto update;
|
|
}
|
|
/*
|
|
* If the user is not root, ensure that they own the directory
|
|
* onto which we are attempting to mount.
|
|
*/
|
|
if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) ||
|
|
(va.va_uid != p->p_ucred->cr_uid &&
|
|
(error = suser(p)))) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) != 0)
|
|
return (error);
|
|
if (vp->v_type != VDIR) {
|
|
vput(vp);
|
|
return (ENOTDIR);
|
|
}
|
|
#ifdef COMPAT_43
|
|
/*
|
|
* Historically filesystem types were identified by number. If we
|
|
* get an integer for the filesystem type instead of a string, we
|
|
* check to see if it matches one of the historic filesystem types.
|
|
*/
|
|
fstypenum = (uintptr_t)SCARG(uap, type);
|
|
if (fstypenum < maxvfsconf) {
|
|
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
|
|
if (vfsp->vfc_typenum == fstypenum)
|
|
break;
|
|
if (vfsp == NULL) {
|
|
vput(vp);
|
|
return (ENODEV);
|
|
}
|
|
strncpy(fstypename, vfsp->vfc_name, MFSNAMELEN);
|
|
} else
|
|
#endif /* COMPAT_43 */
|
|
if ((error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL)) != 0) {
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
|
|
if (!strcmp(vfsp->vfc_name, fstypename))
|
|
break;
|
|
if (vfsp == NULL) {
|
|
linker_file_t lf;
|
|
|
|
/* Refuse to load modules if securelevel raised */
|
|
if (securelevel > 0) {
|
|
vput(vp);
|
|
return EPERM;
|
|
}
|
|
/* Only load modules for root (very important!) */
|
|
if ((error = suser(p)) != 0) {
|
|
vput(vp);
|
|
return error;
|
|
}
|
|
error = linker_load_file(fstypename, &lf);
|
|
if (error || lf == NULL) {
|
|
vput(vp);
|
|
if (lf == NULL)
|
|
error = ENODEV;
|
|
return error;
|
|
}
|
|
lf->userrefs++;
|
|
/* lookup again, see if the VFS was loaded */
|
|
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
|
|
if (!strcmp(vfsp->vfc_name, fstypename))
|
|
break;
|
|
if (vfsp == NULL) {
|
|
lf->userrefs--;
|
|
linker_file_unload(lf);
|
|
vput(vp);
|
|
return (ENODEV);
|
|
}
|
|
}
|
|
simple_lock(&vp->v_interlock);
|
|
if ((vp->v_flag & VMOUNT) != 0 ||
|
|
vp->v_mountedhere != NULL) {
|
|
simple_unlock(&vp->v_interlock);
|
|
vput(vp);
|
|
return (EBUSY);
|
|
}
|
|
vp->v_flag |= VMOUNT;
|
|
simple_unlock(&vp->v_interlock);
|
|
|
|
/*
|
|
* Allocate and initialize the filesystem.
|
|
*/
|
|
mp = (struct mount *)malloc((u_long)sizeof(struct mount),
|
|
M_MOUNT, M_WAITOK);
|
|
bzero((char *)mp, (u_long)sizeof(struct mount));
|
|
lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, LK_NOPAUSE);
|
|
(void)vfs_busy(mp, LK_NOWAIT, 0, p);
|
|
mp->mnt_op = vfsp->vfc_vfsops;
|
|
mp->mnt_vfc = vfsp;
|
|
vfsp->vfc_refcount++;
|
|
mp->mnt_stat.f_type = vfsp->vfc_typenum;
|
|
mp->mnt_flag |= vfsp->vfc_flags & MNT_VISFLAGMASK;
|
|
strncpy(mp->mnt_stat.f_fstypename, vfsp->vfc_name, MFSNAMELEN);
|
|
mp->mnt_vnodecovered = vp;
|
|
mp->mnt_stat.f_owner = p->p_ucred->cr_uid;
|
|
VOP_UNLOCK(vp, 0, p);
|
|
update:
|
|
/*
|
|
* Set the mount level flags.
|
|
*/
|
|
if (SCARG(uap, flags) & MNT_RDONLY)
|
|
mp->mnt_flag |= MNT_RDONLY;
|
|
else if (mp->mnt_flag & MNT_RDONLY)
|
|
mp->mnt_kern_flag |= MNTK_WANTRDWR;
|
|
mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
|
|
MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOATIME |
|
|
MNT_NOSYMFOLLOW |
|
|
MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
|
|
mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |
|
|
MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_FORCE |
|
|
MNT_NOSYMFOLLOW |
|
|
MNT_NOATIME | MNT_NOCLUSTERR | MNT_NOCLUSTERW | MNT_SUIDDIR);
|
|
/*
|
|
* Mount the filesystem.
|
|
*/
|
|
error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
vrele(vp);
|
|
if (mp->mnt_kern_flag & MNTK_WANTRDWR)
|
|
mp->mnt_flag &= ~MNT_RDONLY;
|
|
mp->mnt_flag &=~ (MNT_UPDATE | MNT_RELOAD | MNT_FORCE);
|
|
mp->mnt_kern_flag &=~ MNTK_WANTRDWR;
|
|
if (error) {
|
|
mp->mnt_flag = flag;
|
|
mp->mnt_kern_flag = flag2;
|
|
}
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0) {
|
|
if (mp->mnt_syncer == NULL)
|
|
error = vfs_allocate_syncvnode(mp);
|
|
} else {
|
|
if (mp->mnt_syncer != NULL)
|
|
vrele(mp->mnt_syncer);
|
|
mp->mnt_syncer = NULL;
|
|
}
|
|
vfs_unbusy(mp, p);
|
|
return (error);
|
|
}
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
/*
|
|
* Put the new filesystem on the mount list after root.
|
|
*/
|
|
cache_purge(vp);
|
|
if (!error) {
|
|
simple_lock(&vp->v_interlock);
|
|
vp->v_flag &= ~VMOUNT;
|
|
vp->v_mountedhere = mp;
|
|
simple_unlock(&vp->v_interlock);
|
|
simple_lock(&mountlist_slock);
|
|
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
|
|
simple_unlock(&mountlist_slock);
|
|
checkdirs(vp);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0)
|
|
error = vfs_allocate_syncvnode(mp);
|
|
vfs_unbusy(mp, p);
|
|
if ((error = VFS_START(mp, 0, p)) != 0)
|
|
vrele(vp);
|
|
} else {
|
|
simple_lock(&vp->v_interlock);
|
|
vp->v_flag &= ~VMOUNT;
|
|
simple_unlock(&vp->v_interlock);
|
|
mp->mnt_vfc->vfc_refcount--;
|
|
vfs_unbusy(mp, p);
|
|
free((caddr_t)mp, M_MOUNT);
|
|
vput(vp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Scan all active processes to see if any of them have a current
|
|
* or root directory onto which the new filesystem has just been
|
|
* mounted. If so, replace them with the new mount point.
|
|
*/
|
|
static void
|
|
checkdirs(olddp)
|
|
struct vnode *olddp;
|
|
{
|
|
struct filedesc *fdp;
|
|
struct vnode *newdp;
|
|
struct proc *p;
|
|
|
|
if (olddp->v_usecount == 1)
|
|
return;
|
|
if (VFS_ROOT(olddp->v_mountedhere, &newdp))
|
|
panic("mount: lost mount");
|
|
for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
|
|
fdp = p->p_fd;
|
|
if (fdp->fd_cdir == olddp) {
|
|
vrele(fdp->fd_cdir);
|
|
VREF(newdp);
|
|
fdp->fd_cdir = newdp;
|
|
}
|
|
if (fdp->fd_rdir == olddp) {
|
|
vrele(fdp->fd_rdir);
|
|
VREF(newdp);
|
|
fdp->fd_rdir = newdp;
|
|
}
|
|
}
|
|
if (rootvnode == olddp) {
|
|
vrele(rootvnode);
|
|
VREF(newdp);
|
|
rootvnode = newdp;
|
|
}
|
|
vput(newdp);
|
|
}
|
|
|
|
/*
|
|
* Unmount a file system.
|
|
*
|
|
* Note: unmount takes a path to the vnode mounted on as argument,
|
|
* not special file (as before).
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct unmount_args {
|
|
char *path;
|
|
int flags;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
unmount(p, uap)
|
|
struct proc *p;
|
|
register struct unmount_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) flags;
|
|
} */ *uap;
|
|
{
|
|
register struct vnode *vp;
|
|
struct mount *mp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
mp = vp->v_mount;
|
|
|
|
/*
|
|
* Only root, or the user that did the original mount is
|
|
* permitted to unmount this filesystem.
|
|
*/
|
|
if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) &&
|
|
(error = suser(p))) {
|
|
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;
|
|
int async_flag;
|
|
|
|
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);
|
|
async_flag = mp->mnt_flag & MNT_ASYNC;
|
|
mp->mnt_flag &=~ MNT_ASYNC;
|
|
cache_purgevfs(mp); /* remove cache entries for this file sys */
|
|
if (mp->mnt_syncer != NULL)
|
|
vrele(mp->mnt_syncer);
|
|
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) {
|
|
if ((mp->mnt_flag & MNT_RDONLY) == 0 && mp->mnt_syncer == NULL)
|
|
(void) vfs_allocate_syncvnode(mp);
|
|
mp->mnt_kern_flag &= ~MNTK_UNMOUNT;
|
|
mp->mnt_flag |= async_flag;
|
|
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE,
|
|
&mountlist_slock, p);
|
|
if (mp->mnt_kern_flag & MNTK_MWAIT)
|
|
wakeup((caddr_t)mp);
|
|
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);
|
|
mp->mnt_flag |= asyncflag;
|
|
}
|
|
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);
|
|
}
|
|
|
|
/* XXX PRISON: could be per prison flag */
|
|
static int prison_quotas;
|
|
#if 0
|
|
SYSCTL_INT(_kern_prison, OID_AUTO, quotas, CTLFLAG_RW, &prison_quotas, 0, "");
|
|
#endif
|
|
|
|
/*
|
|
* 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;
|
|
|
|
if (p->p_prison && !prison_quotas)
|
|
return (EPERM);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
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)) != 0)
|
|
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 (suser_xxx(p->p_ucred, 0, 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)) != 0)
|
|
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 (suser_xxx(p->p_ucred, 0, 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 or MNT_LAZY is specified, do not
|
|
* refresh the fsstat cache. MNT_NOWAIT or MNT_LAZY
|
|
* overrides MNT_WAIT.
|
|
*/
|
|
if (((SCARG(uap, flags) & (MNT_LAZY|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)) != 0)
|
|
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)) != 0)
|
|
return (error);
|
|
vrele(fdp->fd_cdir);
|
|
fdp->fd_cdir = nd.ni_vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Helper function for raised chroot(2) security function: Refuse if
|
|
* any filedescriptors are open directories.
|
|
*/
|
|
static int
|
|
chroot_refuse_vdir_fds(fdp)
|
|
struct filedesc *fdp;
|
|
{
|
|
struct vnode *vp;
|
|
struct file *fp;
|
|
int error;
|
|
int fd;
|
|
|
|
for (fd = 0; fd < fdp->fd_nfiles ; fd++) {
|
|
error = getvnode(fdp, fd, &fp);
|
|
if (error)
|
|
continue;
|
|
vp = (struct vnode *)fp->f_data;
|
|
if (vp->v_type != VDIR)
|
|
continue;
|
|
return(EPERM);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This sysctl determines if we will allow a process to chroot(2) if it
|
|
* has a directory open:
|
|
* 0: disallowed for all processes.
|
|
* 1: allowed for processes that were not already chroot(2)'ed.
|
|
* 2: allowed for all processes.
|
|
*/
|
|
|
|
static int chroot_allow_open_directories = 1;
|
|
|
|
SYSCTL_INT(_kern, OID_AUTO, chroot_allow_open_directories, CTLFLAG_RW,
|
|
&chroot_allow_open_directories, 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_xxx(0, p, PRISON_ROOT);
|
|
if (error)
|
|
return (error);
|
|
if (chroot_allow_open_directories == 0 ||
|
|
(chroot_allow_open_directories == 1 && fdp->fd_rdir != rootvnode))
|
|
error = chroot_refuse_vdir_fds(fdp);
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = change_dir(&nd, p)) != 0)
|
|
return (error);
|
|
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_data = (caddr_t)vp;
|
|
fp->f_flag = flags & FMASK;
|
|
fp->f_ops = &vnops;
|
|
fp->f_type = (vp->v_type == VFIFO ? DTYPE_FIFO : DTYPE_VNODE);
|
|
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)) != 0) {
|
|
(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;
|
|
}
|
|
/* assert that vn_open created a backing object if one is needed */
|
|
KASSERT(!vn_canvmio(vp) || vp->v_object != NULL,
|
|
("open: vmio vnode has no backing object after vn_open"));
|
|
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 = 0;
|
|
struct nameidata nd;
|
|
|
|
switch (SCARG(uap, mode) & S_IFMT) {
|
|
case S_IFCHR:
|
|
case S_IFBLK:
|
|
error = suser(p);
|
|
break;
|
|
default:
|
|
error = suser_xxx(0, p, PRISON_ROOT);
|
|
break;
|
|
}
|
|
if (error)
|
|
return (error);
|
|
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
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);
|
|
vput(nd.ni_dvp);
|
|
}
|
|
} 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)) != 0)
|
|
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);
|
|
error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
|
|
vput(nd.ni_dvp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* 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)) != 0)
|
|
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_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);
|
|
}
|
|
if (nd.ni_dvp == nd.ni_vp)
|
|
vrele(nd.ni_dvp);
|
|
else
|
|
vput(nd.ni_dvp);
|
|
}
|
|
}
|
|
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)) != 0)
|
|
goto out;
|
|
NDINIT(&nd, CREATE, LOCKPARENT|NOOBJ, UIO_USERSPACE, SCARG(uap, link), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
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);
|
|
vput(nd.ni_dvp);
|
|
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)) != 0)
|
|
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)) != 0)
|
|
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)) != 0)
|
|
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)) != 0)
|
|
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)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = vn_stat(vp, &sb, p);
|
|
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)) != 0)
|
|
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)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = vn_stat(vp, &sb, p);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
cvtnstat(sb, nsb)
|
|
struct stat *sb;
|
|
struct nstat *nsb;
|
|
{
|
|
nsb->st_dev = sb->st_dev;
|
|
nsb->st_ino = sb->st_ino;
|
|
nsb->st_mode = sb->st_mode;
|
|
nsb->st_nlink = sb->st_nlink;
|
|
nsb->st_uid = sb->st_uid;
|
|
nsb->st_gid = sb->st_gid;
|
|
nsb->st_rdev = sb->st_rdev;
|
|
nsb->st_atimespec = sb->st_atimespec;
|
|
nsb->st_mtimespec = sb->st_mtimespec;
|
|
nsb->st_ctimespec = sb->st_ctimespec;
|
|
nsb->st_size = sb->st_size;
|
|
nsb->st_blocks = sb->st_blocks;
|
|
nsb->st_blksize = sb->st_blksize;
|
|
nsb->st_flags = sb->st_flags;
|
|
nsb->st_gen = sb->st_gen;
|
|
}
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct nstat_args {
|
|
char *path;
|
|
struct nstat *ub;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
nstat(p, uap)
|
|
struct proc *p;
|
|
register struct nstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct nstat *) ub;
|
|
} */ *uap;
|
|
{
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = vn_stat(nd.ni_vp, &sb, p);
|
|
vput(nd.ni_vp);
|
|
if (error)
|
|
return (error);
|
|
cvtnstat(&sb, &nsb);
|
|
error = copyout((caddr_t)&nsb, (caddr_t)SCARG(uap, ub), sizeof (nsb));
|
|
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
|
|
nlstat(p, uap)
|
|
struct proc *p;
|
|
register struct nlstat_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct nstat *) ub;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct vnode *vp;
|
|
struct stat sb;
|
|
struct nstat nsb;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
|
|
SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
error = vn_stat(vp, &sb, p);
|
|
vput(vp);
|
|
if (error)
|
|
return (error);
|
|
cvtnstat(&sb, &nsb);
|
|
error = copyout((caddr_t)&nsb, (caddr_t)SCARG(uap, ub), sizeof (nsb));
|
|
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)) != 0)
|
|
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)) != 0)
|
|
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);
|
|
}
|
|
|
|
static int
|
|
setfflags(p, vp, flags)
|
|
struct proc *p;
|
|
struct vnode *vp;
|
|
int flags;
|
|
{
|
|
int error;
|
|
struct vattr vattr;
|
|
|
|
/*
|
|
* Prevent non-root users from setting flags on devices. When
|
|
* a device is reused, users can retain ownership of the device
|
|
* if they are allowed to set flags and programs assume that
|
|
* chown can't fail when done as root.
|
|
*/
|
|
if ((vp->v_type == VCHR || vp->v_type == VBLK) &&
|
|
((error = suser_xxx(p->p_ucred, p, PRISON_ROOT)) != 0))
|
|
return (error);
|
|
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_flags = flags;
|
|
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
|
|
VOP_UNLOCK(vp, 0, p);
|
|
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;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setfflags(p, nd.ni_vp, SCARG(uap, flags));
|
|
vrele(nd.ni_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 file *fp;
|
|
int error;
|
|
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
return setfflags(p, (struct vnode *) fp->f_data, SCARG(uap, flags));
|
|
}
|
|
|
|
static int
|
|
setfmode(p, vp, mode)
|
|
struct proc *p;
|
|
struct vnode *vp;
|
|
int mode;
|
|
{
|
|
int error;
|
|
struct vattr vattr;
|
|
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_mode = mode & ALLPERMS;
|
|
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;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setfmode(p, nd.ni_vp, SCARG(uap, mode));
|
|
vrele(nd.ni_vp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Change mode of a file given path name (don't follow links.)
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lchmod_args {
|
|
char *path;
|
|
int mode;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
lchmod(p, uap)
|
|
struct proc *p;
|
|
register struct lchmod_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(int) mode;
|
|
} */ *uap;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setfmode(p, nd.ni_vp, SCARG(uap, mode));
|
|
vrele(nd.ni_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 file *fp;
|
|
int error;
|
|
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
return setfmode(p, (struct vnode *)fp->f_data, SCARG(uap, mode));
|
|
}
|
|
|
|
static int
|
|
setfown(p, vp, uid, gid)
|
|
struct proc *p;
|
|
struct vnode *vp;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
{
|
|
int error;
|
|
struct vattr vattr;
|
|
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_uid = uid;
|
|
vattr.va_gid = gid;
|
|
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;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setfown(p, nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid));
|
|
vrele(nd.ni_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;
|
|
{
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setfown(p, nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid));
|
|
vrele(nd.ni_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 file *fp;
|
|
int error;
|
|
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
return setfown(p, (struct vnode *)fp->f_data,
|
|
SCARG(uap, uid), SCARG(uap, gid));
|
|
}
|
|
|
|
static int
|
|
getutimes(usrtvp, tsp)
|
|
const struct timeval *usrtvp;
|
|
struct timespec *tsp;
|
|
{
|
|
struct timeval tv[2];
|
|
int error;
|
|
|
|
if (usrtvp == NULL) {
|
|
vfs_timestamp(&tsp[0]);
|
|
tsp[1] = tsp[0];
|
|
} else {
|
|
if ((error = copyin(usrtvp, tv, sizeof (tv))) != 0)
|
|
return (error);
|
|
TIMEVAL_TO_TIMESPEC(&tv[0], &tsp[0]);
|
|
TIMEVAL_TO_TIMESPEC(&tv[1], &tsp[1]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
setutimes(p, vp, ts, nullflag)
|
|
struct proc *p;
|
|
struct vnode *vp;
|
|
const struct timespec *ts;
|
|
int nullflag;
|
|
{
|
|
int error;
|
|
struct vattr vattr;
|
|
|
|
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
VATTR_NULL(&vattr);
|
|
vattr.va_atime = ts[0];
|
|
vattr.va_mtime = ts[1];
|
|
if (nullflag)
|
|
vattr.va_vaflags |= VA_UTIMES_NULL;
|
|
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;
|
|
{
|
|
struct timespec ts[2];
|
|
struct timeval *usrtvp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
usrtvp = SCARG(uap, tptr);
|
|
if ((error = getutimes(usrtvp, ts)) != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setutimes(p, nd.ni_vp, ts, usrtvp == NULL);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct lutimes_args {
|
|
char *path;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
lutimes(p, uap)
|
|
struct proc *p;
|
|
register struct lutimes_args /* {
|
|
syscallarg(char *) path;
|
|
syscallarg(struct timeval *) tptr;
|
|
} */ *uap;
|
|
{
|
|
struct timespec ts[2];
|
|
struct timeval *usrtvp;
|
|
int error;
|
|
struct nameidata nd;
|
|
|
|
usrtvp = SCARG(uap, tptr);
|
|
if ((error = getutimes(usrtvp, ts)) != 0)
|
|
return (error);
|
|
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
|
|
if ((error = namei(&nd)) != 0)
|
|
return (error);
|
|
error = setutimes(p, nd.ni_vp, ts, usrtvp == NULL);
|
|
vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set the access and modification times of a file.
|
|
*/
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct futimes_args {
|
|
int fd;
|
|
struct timeval *tptr;
|
|
};
|
|
#endif
|
|
/* ARGSUSED */
|
|
int
|
|
futimes(p, uap)
|
|
struct proc *p;
|
|
register struct futimes_args /* {
|
|
syscallarg(int ) fd;
|
|
syscallarg(struct timeval *) tptr;
|
|
} */ *uap;
|
|
{
|
|
struct timespec ts[2];
|
|
struct file *fp;
|
|
struct timeval *usrtvp;
|
|
int error;
|
|
|
|
usrtvp = SCARG(uap, tptr);
|
|
if ((error = getutimes(usrtvp, ts)) != 0)
|
|
return (error);
|
|
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
|
|
return (error);
|
|
return setutimes(p, (struct vnode *)fp->f_data, ts, usrtvp == NULL);
|
|
}
|
|
|
|
/*
|
|
* 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)) != 0)
|
|
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)) != 0)
|
|
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)) != 0)
|
|
return (error);
|
|
vp = (struct vnode *)fp->f_data;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
if (vp->v_object)
|
|
vm_object_page_clean(vp->v_object, 0, 0, 0);
|
|
if ((error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p)) == 0 &&
|
|
vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP) &&
|
|
bioops.io_fsync)
|
|
error = (*bioops.io_fsync)(vp);
|
|
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)) != 0)
|
|
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)) != 0) {
|
|
/* 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)) != 0)
|
|
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);
|
|
vput(nd.ni_dvp);
|
|
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)) != 0)
|
|
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);
|
|
if (vp != NULLVP)
|
|
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;
|
|
{
|
|
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)) != 0)
|
|
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);
|
|
if (SCARG(uap, count) == auio.uio_resid) {
|
|
if (union_dircheckp) {
|
|
error = union_dircheckp(p, &vp, fp);
|
|
if (error == -1)
|
|
goto unionread;
|
|
if (error)
|
|
return (error);
|
|
}
|
|
if ((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;
|
|
{
|
|
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)) != 0)
|
|
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);
|
|
if (SCARG(uap, count) == auio.uio_resid) {
|
|
if (union_dircheckp) {
|
|
error = union_dircheckp(p, &vp, fp);
|
|
if (error == -1)
|
|
goto unionread;
|
|
if (error)
|
|
return (error);
|
|
}
|
|
if ((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;
|
|
}
|
|
}
|
|
if (SCARG(uap, basep) != NULL) {
|
|
error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),
|
|
sizeof(long));
|
|
}
|
|
p->p_retval[0] = SCARG(uap, count) - auio.uio_resid;
|
|
return (error);
|
|
}
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct getdents_args {
|
|
int fd;
|
|
char *buf;
|
|
size_t count;
|
|
};
|
|
#endif
|
|
int
|
|
getdents(p, uap)
|
|
struct proc *p;
|
|
register struct getdents_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) buf;
|
|
syscallarg(u_int) count;
|
|
} */ *uap;
|
|
{
|
|
struct getdirentries_args ap;
|
|
ap.fd = uap->fd;
|
|
ap.buf = uap->buf;
|
|
ap.count = uap->count;
|
|
ap.basep = NULL;
|
|
return getdirentries(p, &ap);
|
|
}
|
|
|
|
/*
|
|
* 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)) != 0)
|
|
return (error);
|
|
vp = nd.ni_vp;
|
|
if (vp->v_type != VCHR && vp->v_type != VBLK) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)
|
|
goto out;
|
|
if (p->p_ucred->cr_uid != vattr.va_uid &&
|
|
(error = suser_xxx(0, p, PRISON_ROOT)))
|
|
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
|
|
|
|
SYSCTL_DECL(_vfs_cache);
|
|
#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);
|
|
}
|