Source to bsd/vfs/vfs_syscalls.c
/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995-1999 Apple Computer, Inc. All Rights Reserved */
/*
* 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 8.41 (Berkeley) 6/15/95
*/
#include <mach_nbc.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/filedesc.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/dirent.h>
#include <sys/attr.h>
#include <sys/sysctl.h>
#include <kern/mapfs.h>
struct lock__bsd__ exchangelock;
static int change_dir __P((struct nameidata *ndp, struct proc *p));
static void checkdirs __P((struct vnode *olddp));
#ifdef NeXT
unsigned int vfs_nummntops=0; /* counts number of mount and unmount operations */
#endif
/*
* Virtual File System System Calls
*/
/*
* Mount a file system.
*/
struct mount_args {
char *type;
char *path;
int flags;
caddr_t data;
};
/* ARGSUSED */
int
mount(p, uap, retval)
struct proc *p;
register struct mount_args *uap;
register_t *retval;
{
struct vnode *vp;
struct mount *mp;
struct vfsconf *vfsp;
int error, flag;
struct vattr va;
u_long fstypenum;
struct nameidata nd;
char fstypename[MFSNAMELEN];
size_t dummy=0;
/*
* Get vnode to be covered
*/
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
uap->path, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
if ((vp->v_flag & VROOT) &&
(vp->v_mount->mnt_flag & MNT_ROOTFS)) uap->flags |= MNT_UPDATE;
if (uap->flags & MNT_UPDATE) {
if ((vp->v_flag & VROOT) == 0) {
vput(vp);
return (EINVAL);
}
mp = vp->v_mount;
flag = mp->mnt_flag;
/*
* We only allow the filesystem to be reloaded if it
* is currently mounted read-only.
*/
if ((uap->flags & MNT_RELOAD) &&
((mp->mnt_flag & MNT_RDONLY) == 0)) {
vput(vp);
return (EOPNOTSUPP); /* Needs translation */
}
mp->mnt_flag |=
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->p_ucred, &p->p_acflag))) {
vput(vp);
return (error);
}
/*
* Do not allow NFS export by non-root users. FOr non-root
* users, silently enforce MNT_NOSUID and MNT_NODEV, and
* MNT_NOEXEC if mount point is already MNT_NOEXEC.
*/
if (p->p_ucred->cr_uid != 0) {
if (uap->flags & MNT_EXPORTED) {
vput(vp);
return (EPERM);
}
uap->flags |= MNT_NOSUID | MNT_NODEV;
if (flag & MNT_NOEXEC)
uap->flags |= MNT_NOEXEC;
}
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->p_ucred, &p->p_acflag)))) {
vput(vp);
return (error);
}
/*
* Do not allow NFS export by non-root users. FOr non-root
* users, silently enforce MNT_NOSUID and MNT_NODEV, and
* MNT_NOEXEC if mount point is already MNT_NOEXEC.
*/
if (p->p_ucred->cr_uid != 0) {
if (uap->flags & MNT_EXPORTED) {
vput(vp);
return (EPERM);
}
uap->flags |= MNT_NOSUID | MNT_NODEV;
if (vp->v_mount->mnt_flag & MNT_NOEXEC)
uap->flags |= MNT_NOEXEC;
}
if (error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) {
vput(vp);
return (error);
}
if (vp->v_type != VDIR) {
vput(vp);
return (ENOTDIR);
}
#if 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 = (u_long)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(uap->type, fstypename, MFSNAMELEN, &dummy)) {
vput(vp);
return (error);
}
for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)
if (!strcmp(vfsp->vfc_name, fstypename))
break;
if (vfsp == NULL) {
vput(vp);
return (ENODEV);
}
if (vp->v_mountedhere != NULL) {
vput(vp);
return (EBUSY);
}
/*
* Allocate and initialize the filesystem.
*/
mp = (struct mount *)_MALLOC_ZONE((u_long)sizeof(struct mount),
M_MOUNT, M_WAITOK);
bzero((char *)mp, (u_long)sizeof(struct mount));
lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0);
(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);
vp->v_mountedhere = mp;
mp->mnt_vnodecovered = vp;
mp->mnt_stat.f_owner = p->p_ucred->cr_uid;
update:
/*
* Set the mount level flags.
*/
if (uap->flags & MNT_RDONLY)
mp->mnt_flag |= MNT_RDONLY;
else if (mp->mnt_flag & MNT_RDONLY)
mp->mnt_flag |= MNT_WANTRDWR;
mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC);
mp->mnt_flag |= uap->flags & (MNT_NOSUID | MNT_NOEXEC |
MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC);
/*
* Mount the filesystem.
*/
error = VFS_MOUNT(mp, uap->path, uap->data, &nd, p);
if (mp->mnt_flag & MNT_UPDATE) {
vrele(vp);
if (mp->mnt_flag & MNT_WANTRDWR)
mp->mnt_flag &= ~MNT_RDONLY;
mp->mnt_flag &=~
(MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR);
if (error)
mp->mnt_flag = flag;
vfs_unbusy(mp, p);
return (error);
}
/*
* Put the new filesystem on the mount list after root.
*/
cache_purge(vp);
if (!error) {
simple_lock(&mountlist_slock);
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
simple_unlock(&mountlist_slock);
checkdirs(vp);
VOP_UNLOCK(vp, 0, p);
vfs_unbusy(mp, p);
if (error = VFS_START(mp, 0, p))
vrele(vp);
#ifdef NeXT
/* increment the operations count */
if (!error) vfs_nummntops++;
#endif
} else {
mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0;
mp->mnt_vfc->vfc_refcount--;
vfs_unbusy(mp, p);
_FREE_ZONE((caddr_t)mp, sizeof (struct mount), 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).
*/
struct unmount_args {
char *path;
int flags;
};
/* ARGSUSED */
int
unmount(p, uap, retval)
struct proc *p;
register struct unmount_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct mount *mp;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
uap->path, p);
if (error = namei(&nd))
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->p_ucred, &p->p_acflag))) {
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, 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_flag |= MNT_UNMOUNT;
lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_slock, p);
mp->mnt_flag &=~ MNT_ASYNC;
#if MACH_NBC
mapfs_cache_clear();
#endif
vnode_pager_umount(mp); /* release cached vnodes */
#if MACH_NBC
vm_object_cache_clear(); /* clear the object cache */
#endif /* MACH_NBC */
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_flag &= ~MNT_UNMOUNT;
lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE,
&mountlist_slock, p);
goto out;
}
#ifdef NeXT
/* increment the operations count */
if (!error) vfs_nummntops++;
#endif
CIRCLEQ_REMOVE(&mountlist, mp, mnt_list);
if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) {
coveredvp->v_mountedhere = (struct mount *)0;
simple_unlock(&mountlist_slock);
vrele(coveredvp);
simple_lock(&mountlist_slock);
}
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);
out:
if (mp->mnt_flag & MNT_MWAIT)
wakeup((caddr_t)mp);
if (!error)
_FREE_ZONE((caddr_t)mp, sizeof (struct mount), M_MOUNT);
return (error);
}
/*
* Sync each mounted filesystem.
*/
#if DIAGNOSTIC
int syncprt = 0;
struct ctldebug debug0 = { "syncprt", &syncprt };
#endif
struct sync_args {
int dummy;
};
/* ARGSUSED */
int
sync(p, uap, retval)
struct proc *p;
struct sync_args *uap;
register_t *retval;
{
register struct mount *mp, *nmp;
int asyncflag;
#if MACH_NBC
#if DIAGNOSTIC
{
int error = 0;
error = mapfs_sync();
if (error)
panic("sync: mapfs_sync %d", error);
}
#else
(void)mapfs_sync(); /* Ignore errors! */
#endif /* DIAGNOSTIC */
#endif /* MACH_NBC */
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_SYNC(mp, MNT_NOWAIT, p->p_ucred, 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 DIAGNOSTIC
if (syncprt)
vfs_bufstats();
#endif /* DIAGNOSTIC */
return (0);
}
/*
* Change filesystem quotas.
*/
struct quotactl_args {
char *path;
int cmd;
int uid;
caddr_t arg;
};
/* ARGSUSED */
int
quotactl(p, uap, retval)
struct proc *p;
register struct quotactl_args *uap;
register_t *retval;
{
register struct mount *mp;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
if (error = namei(&nd))
return (error);
mp = nd.ni_vp->v_mount;
vrele(nd.ni_vp);
return (VFS_QUOTACTL(mp, uap->cmd, uap->uid,
uap->arg, p));
}
/*
* Get filesystem statistics.
*/
struct statfs_args {
char *path;
struct statfs *buf;
};
/* ARGSUSED */
int
statfs(p, uap, retval)
struct proc *p;
register struct statfs_args *uap;
register_t *retval;
{
register struct mount *mp;
register struct statfs *sp;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
if (error = namei(&nd))
return (error);
mp = nd.ni_vp->v_mount;
sp = &mp->mnt_stat;
vrele(nd.ni_vp);
if (error = VFS_STATFS(mp, sp, p))
return (error);
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
return (copyout((caddr_t)sp, (caddr_t)uap->buf, sizeof(*sp)));
}
/*
* Get filesystem statistics.
*/
struct fstatfs_args {
int fd;
struct statfs *buf;
};
/* ARGSUSED */
int
fstatfs(p, uap, retval)
struct proc *p;
register struct fstatfs_args *uap;
register_t *retval;
{
struct file *fp;
struct mount *mp;
register struct statfs *sp;
int error;
if (error = getvnode(p, uap->fd, &fp))
return (error);
mp = ((struct vnode *)fp->f_data)->v_mount;
if (!mp)
return (EBADF);
sp = &mp->mnt_stat;
if (error = VFS_STATFS(mp, sp, p))
return (error);
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
return (copyout((caddr_t)sp, (caddr_t)uap->buf, sizeof(*sp)));
}
/*
* Get statistics on all filesystems.
*/
struct getfsstat_args {
struct statfs *buf;
long bufsize;
int flags;
};
int
getfsstat(p, uap, retval)
struct proc *p;
register struct getfsstat_args *uap;
register_t *retval;
{
register struct mount *mp, *nmp;
register struct statfs *sp;
caddr_t sfsp;
long count, maxcount, error;
maxcount = uap->bufsize / sizeof(struct statfs);
sfsp = (caddr_t)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 (((uap->flags & MNT_NOWAIT) == 0 ||
(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;
if (error = copyout((caddr_t)sp, sfsp, sizeof(*sp)))
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)
*retval = maxcount;
else
*retval = count;
return (0);
}
/*
* Change current working directory to a given file descriptor.
*/
struct fchdir_args {
int fd;
};
/* ARGSUSED */
int
fchdir(p, uap, retval)
struct proc *p;
struct fchdir_args *uap;
register_t *retval;
{
register struct filedesc *fdp = p->p_fd;
struct vnode *vp, *tdp;
struct mount *mp;
struct file *fp;
int error;
if (error = getvnode(p, 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 (``.'').
*/
struct chdir_args {
char *path;
};
/* ARGSUSED */
int
chdir(p, uap, retval)
struct proc *p;
struct chdir_args *uap;
register_t *retval;
{
register struct filedesc *fdp = p->p_fd;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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.
*/
struct chroot_args {
char *path;
};
/* ARGSUSED */
int
chroot(p, uap, retval)
struct proc *p;
struct chroot_args *uap;
register_t *retval;
{
register struct filedesc *fdp = p->p_fd;
int error;
struct nameidata nd;
if (error = suser(p->p_ucred, &p->p_acflag))
return (error);
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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;
if (error = namei(ndp))
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.
*/
struct open_args {
char *path;
int flags;
int mode;
};
int
open(p, uap, retval)
struct proc *p;
register struct open_args *uap;
register_t *retval;
{
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
register struct vnode *vp;
int flags, cmode;
struct file *nfp;
int type, indx, error;
struct flock lf;
struct nameidata nd;
extern struct fileops vnops;
/* CERT advisory patch applied from FreeBSD */
/* Refer to Radar#2262895 A. Ramesh */
flags = FFLAGS(uap->flags);
if ((flags & (FREAD | FWRITE))==0)
return(EINVAL);
if (error = falloc(p, &nfp, &indx))
return (error);
fp = nfp;
cmode = ((uap->mode &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
p->p_dupfd = -indx - 1; /* XXX check for fdopen */
if (error = vn_open(&nd, flags, cmode)) {
ffree(fp);
if ((error == ENODEV || error == ENXIO) &&
p->p_dupfd >= 0 && /* XXX from fdopen */
(error =
dupfdopen(fdp, indx, p->p_dupfd, flags, error)) == 0) {
*retval = indx;
return (0);
}
if (error == ERESTART)
error = EINTR;
fdrelse(p, indx);
return (error);
}
p->p_dupfd = 0;
vp = nd.ni_vp;
fp->f_flag = flags & FMASK;
fp->f_type = 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);
fdrelse(p, indx);
return (error);
}
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
fp->f_flag |= FHASLOCK;
}
VOP_UNLOCK(vp, 0, p);
*fdflags(p, indx) &= ~UF_RESERVED;
*retval = indx;
return (0);
}
#if COMPAT_43
/*
* Create a file.
*/
struct ocreat_args {
char *path;
int mode;
};
int
ocreat(p, uap, retval)
struct proc *p;
register struct ocreat_args *uap;
register_t *retval;
{
struct open_args nuap;
nuap.path = uap->path;
nuap.mode = uap->mode;
nuap.flags = O_WRONLY | O_CREAT | O_TRUNC;
return (open(p, &nuap, retval));
}
#endif /* COMPAT_43 */
/*
* Create a special file.
*/
struct mknod_args {
char *path;
int mode;
int dev;
};
/* ARGSUSED */
int
mknod(p, uap, retval)
struct proc *p;
register struct mknod_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
int whiteout;
struct nameidata nd;
if (error = suser(p->p_ucred, &p->p_acflag))
return (error);
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, 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 = (uap->mode & ALLPERMS) &~ p->p_fd->fd_cmask;
vattr.va_rdev = uap->dev;
whiteout = 0;
switch (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);
}
return (error);
}
/*
* Create a named pipe.
*/
struct mkfifo_args {
char *path;
int mode;
};
/* ARGSUSED */
int
mkfifo(p, uap, retval)
struct proc *p;
register struct mkfifo_args *uap;
register_t *retval;
{
struct vattr vattr;
int error;
struct nameidata nd;
#if !FIFO
return (EOPNOTSUPP);
#else
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, 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 = (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));
#endif /* FIFO */
}
/*
* Make a hard file link.
*/
struct link_args {
char *path;
char *link;
};
/* ARGSUSED */
int
link(p, uap, retval)
struct proc *p;
register struct link_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct nameidata nd;
int error;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->path, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
if (vp->v_type == VDIR)
error = EPERM; /* POSIX */
else {
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT;
nd.ni_dirp = uap->link;
if ((error = namei(&nd)) == 0) {
if (nd.ni_vp != NULL)
error = EEXIST;
if (!error) {
VOP_LEASE(nd.ni_dvp, p, p->p_ucred,
LEASE_WRITE);
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
error = VOP_LINK(vp, nd.ni_dvp, &nd.ni_cnd);
} else {
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);
}
}
}
vrele(vp);
return (error);
}
/*
* Make a symbolic link.
*/
struct symlink_args {
char *path;
char *link;
};
/* ARGSUSED */
int
symlink(p, uap, retval)
struct proc *p;
register struct symlink_args *uap;
register_t *retval;
{
struct vattr vattr;
char *path;
int error;
struct nameidata nd;
size_t dummy=0;
MALLOC_ZONE(path, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
if (error = copyinstr(uap->path, path, MAXPATHLEN, &dummy))
goto out;
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, 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);
out:
FREE_ZONE(path, MAXPATHLEN, M_NAMEI);
return (error);
}
/*
* Delete a whiteout from the filesystem.
*/
struct undelete_args {
char *path;
};
/* ARGSUSED */
int
undelete(p, uap, retval)
struct proc *p;
register struct undelete_args *uap;
register_t *retval;
{
int error;
struct nameidata nd;
NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,
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);
return (error);
}
/*
* Delete a name from the filesystem.
*/
struct unlink_args {
char *path;
};
/* ARGSUSED */
static int
_unlink(p, uap, retval, nodelbusy)
struct proc *p;
struct unlink_args *uap;
register_t *retval;
int nodelbusy;
{
register struct vnode *vp;
int error;
struct nameidata nd;
NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, uap->path, p);
/* with hfs semantics, busy files cannot be deleted */
if (nodelbusy)
nd.ni_cnd.cn_flags |= NODELETEBUSY;
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;
else {
(void) vnode_uncache(vp);
if (ISMAPPEDFILE(vp)) {
ubc_unlink(vp);
}
}
}
if (!error) {
VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
error = VOP_REMOVE(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);
}
return (error);
}
/*
* Delete a name from the filesystem using POSIX semantics.
*/
int
unlink(p, uap, retval)
struct proc *p;
struct unlink_args *uap;
register_t *retval;
{
return _unlink(p, uap, retval, 0);
}
/*
* Delete a name from the filesystem using HFS semantics.
*/
int
delete(p, uap, retval)
struct proc *p;
struct unlink_args *uap;
register_t *retval;
{
return _unlink(p, uap, retval, 1);
}
/*
* Reposition read/write file offset.
*/
struct lseek_args {
int fd;
#ifdef DOUBLE_ALIGN_PARAMS
int pad;
#endif
off_t offset;
int whence;
};
int
lseek(p, uap, retval)
struct proc *p;
register struct lseek_args *uap;
register_t *retval;
{
struct ucred *cred = p->p_ucred;
struct file *fp;
struct vattr vattr;
int error;
if (error = fdgetf(p, uap->fd, &fp))
return (error);
if (fp->f_type != DTYPE_VNODE)
return (ESPIPE);
switch (uap->whence) {
case L_INCR:
fp->f_offset += uap->offset;
break;
case L_XTND:
if (error =
VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p))
return (error);
fp->f_offset = uap->offset + vattr.va_size;
break;
case L_SET:
fp->f_offset = uap->offset;
break;
default:
return (EINVAL);
}
*(off_t *)retval = fp->f_offset;
return (0);
}
#if COMPAT_43
/*
* Reposition read/write file offset.
*/
struct olseek_args {
int fd;
long offset;
int whence;
};
int
olseek(p, uap, retval)
struct proc *p;
register struct olseek_args *uap;
register_t *retval;
{
struct lseek_args /* {
syscallarg(int) fd;
#ifdef DOUBLE_ALIGN_PARAMS
syscallarg(int) pad;
#endif
syscallarg(off_t) offset;
syscallarg(int) whence;
} */ nuap;
off_t qret;
int error;
nuap.fd = uap->fd;
nuap.offset = uap->offset;
nuap.whence = uap->whence;
error = lseek(p, &nuap, &qret);
*(long *)retval = qret;
return (error);
}
#endif /* COMPAT_43 */
/*
* Check access permissions.
*/
struct access_args {
char *path;
int flags;
};
int
access(p, uap, retval)
struct proc *p;
register struct access_args *uap;
register_t *retval;
{
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, UIO_USERSPACE,
uap->path, p);
if (error = namei(&nd))
goto out1;
vp = nd.ni_vp;
/* Flags == 0 means only check for existence. */
if (uap->flags) {
flags = 0;
if (uap->flags & R_OK)
flags |= VREAD;
if (uap->flags & W_OK)
flags |= VWRITE;
if (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 COMPAT_43
/*
* Get file status; this version follows links.
*/
struct ostat_args {
char *path;
struct ostat *ub;
};
/* ARGSUSED */
int
ostat(p, uap, retval)
struct proc *p;
register struct ostat_args *uap;
register_t *retval;
{
struct stat sb;
struct ostat osb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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)uap->ub, sizeof (osb));
return (error);
}
/*
* Get file status; this version does not follow links.
*/
struct olstat_args {
char *path;
struct ostat *ub;
};
/* ARGSUSED */
int
olstat(p, uap, retval)
struct proc *p;
register struct olstat_args *uap;
register_t *retval;
{
struct vnode *vp, *dvp;
struct stat sb, sb1;
struct ostat osb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE,
uap->path, p);
if (error = namei(&nd))
return (error);
/*
* For symbolic links, always return the attributes of its
* containing directory, except for mode, size, and links.
*/
vp = nd.ni_vp;
dvp = nd.ni_dvp;
if (vp->v_type != VLNK) {
if (dvp == vp)
vrele(dvp);
else
vput(dvp);
error = vn_stat(vp, &sb, p);
vput(vp);
if (error)
return (error);
} else {
error = vn_stat(dvp, &sb, p);
vput(dvp);
if (error) {
vput(vp);
return (error);
}
error = vn_stat(vp, &sb1, p);
vput(vp);
if (error)
return (error);
sb.st_mode &= ~S_IFDIR;
sb.st_mode |= S_IFLNK;
sb.st_nlink = sb1.st_nlink;
sb.st_size = sb1.st_size;
sb.st_blocks = sb1.st_blocks;
}
cvtstat(&sb, &osb);
error = copyout((caddr_t)&osb, (caddr_t)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 */
/*
* Get file status; this version follows links.
*/
struct stat_args {
char *path;
struct stat *ub;
};
/* ARGSUSED */
int
stat(p, uap, retval)
struct proc *p;
register struct stat_args *uap;
register_t *retval;
{
struct stat sb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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)uap->ub, sizeof (sb));
return (error);
}
/*
* Get file status; this version does not follow links.
*/
struct lstat_args {
char *path;
struct stat *ub;
};
/* ARGSUSED */
int
lstat(p, uap, retval)
struct proc *p;
register struct lstat_args *uap;
register_t *retval;
{
int error;
struct vnode *vp, *dvp;
struct stat sb, sb1;
struct nameidata nd;
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE,
uap->path, p);
if (error = namei(&nd))
return (error);
/*
* For symbolic links, always return the attributes of its containing
* directory, except for mode, size, inode number, and links.
*/
vp = nd.ni_vp;
dvp = nd.ni_dvp;
if ((vp->v_type != VLNK) || ((vp->v_type == VLNK) && (vp->v_tag == VT_NFS))) {
if (dvp == vp)
vrele(dvp);
else
vput(dvp);
error = vn_stat(vp, &sb, p);
vput(vp);
if (error)
return (error);
if (vp->v_type == VLNK)
sb.st_mode |= S_IFLNK;
} else {
error = vn_stat(dvp, &sb, p);
vput(dvp);
if (error) {
vput(vp);
return (error);
}
error = vn_stat(vp, &sb1, p);
vput(vp);
if (error)
return (error);
sb.st_mode &= ~S_IFDIR;
sb.st_mode |= S_IFLNK;
sb.st_nlink = sb1.st_nlink;
sb.st_size = sb1.st_size;
sb.st_blocks = sb1.st_blocks;
sb.st_ino = sb1.st_ino;
}
error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb));
return (error);
}
/*
* Get configurable pathname variables.
*/
struct pathconf_args {
char *path;
int name;
};
/* ARGSUSED */
int
pathconf(p, uap, retval)
struct proc *p;
register struct pathconf_args *uap;
register_t *retval;
{
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
uap->path, p);
if (error = namei(&nd))
return (error);
error = VOP_PATHCONF(nd.ni_vp, uap->name, retval);
vput(nd.ni_vp);
return (error);
}
/*
* Return target name of a symbolic link.
*/
struct readlink_args {
char *path;
char *buf;
int count;
};
/* ARGSUSED */
int
readlink(p, uap, retval)
struct proc *p;
register struct readlink_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct iovec aiov;
struct uio auio;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,
uap->path, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
if (vp->v_type != VLNK)
error = EINVAL;
else {
aiov.iov_base = uap->buf;
aiov.iov_len = 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 = uap->count;
error = VOP_READLINK(vp, &auio, p->p_ucred);
}
vput(vp);
*retval = uap->count - auio.uio_resid;
return (error);
}
/*
* Change flags of a file given a path name.
*/
struct chflags_args {
char *path;
int flags;
};
/* ARGSUSED */
int
chflags(p, uap, retval)
struct proc *p;
register struct chflags_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 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 = uap->flags;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
vput(vp);
return (error);
}
/*
* Change flags of a file given a file descriptor.
*/
struct fchflags_args {
int fd;
int flags;
};
/* ARGSUSED */
int
fchflags(p, uap, retval)
struct proc *p;
register struct fchflags_args *uap;
register_t *retval;
{
struct vattr vattr;
struct vnode *vp;
struct file *fp;
int error;
if (error = getvnode(p, 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 = 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.
*/
struct chmod_args {
char *path;
int mode;
};
/* ARGSUSED */
int
chmod(p, uap, retval)
struct proc *p;
register struct chmod_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 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 = 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.
*/
struct fchmod_args {
int fd;
int mode;
};
/* ARGSUSED */
int
fchmod(p, uap, retval)
struct proc *p;
register struct fchmod_args *uap;
register_t *retval;
{
struct vattr vattr;
struct vnode *vp;
struct file *fp;
int error;
if (error = getvnode(p, 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 = 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.
*/
struct chown_args {
char *path;
int uid;
int gid;
};
/* ARGSUSED */
int
chown(p, uap, retval)
struct proc *p;
register struct chown_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 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 = uap->uid;
vattr.va_gid = uap->gid;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
vput(vp);
return (error);
}
/*
* Set ownership given a file descriptor.
*/
struct fchown_args {
int fd;
int uid;
int gid;
};
/* ARGSUSED */
int
fchown(p, uap, retval)
struct proc *p;
register struct fchown_args *uap;
register_t *retval;
{
struct vattr vattr;
struct vnode *vp;
struct file *fp;
int error;
if (error = getvnode(p, 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 = uap->uid;
vattr.va_gid = 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.
*/
struct utimes_args {
char *path;
struct timeval *tptr;
};
/* ARGSUSED */
int
utimes(p, uap, retval)
struct proc *p;
register struct utimes_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct timeval tv[2];
struct vattr vattr;
int error;
struct nameidata nd;
VATTR_NULL(&vattr);
if (uap->tptr == NULL) {
microtime(&tv[0]);
tv[1] = tv[0];
vattr.va_vaflags |= VA_UTIMES_NULL;
} else if (error = copyin((caddr_t)uap->tptr, (caddr_t)tv,
sizeof (tv)))
return (error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 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.
*/
struct truncate_args {
char *path;
#ifdef DOUBLE_ALIGN_PARAMS
int pad;
#endif
off_t length;
};
/* ARGSUSED */
int
truncate(p, uap, retval)
struct proc *p;
register struct truncate_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 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 = uap->length;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
}
vput(vp);
return (error);
}
/*
* Truncate a file given a file descriptor.
*/
struct ftruncate_args {
int fd;
#ifdef DOUBLE_ALIGN_PARAMS
int pad;
#endif
off_t length;
};
/* ARGSUSED */
int
ftruncate(p, uap, retval)
struct proc *p;
register struct ftruncate_args *uap;
register_t *retval;
{
struct vattr vattr;
struct vnode *vp;
struct file *fp;
int error;
if (error = fdgetf(p, uap->fd, &fp))
return (error);
if (fp->f_type == DTYPE_PSXSHM) {
return(pshm_truncate(p, fp, uap->fd, uap->length, retval));
}
if (fp->f_type != DTYPE_VNODE)
return (EINVAL);
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 = uap->length;
error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);
}
VOP_UNLOCK(vp, 0, p);
return (error);
}
#if COMPAT_43
/*
* Truncate a file given its path name.
*/
struct otruncate_args {
char *path;
long length;
};
/* ARGSUSED */
int
otruncate(p, uap, retval)
struct proc *p;
register struct otruncate_args *uap;
register_t *retval;
{
struct truncate_args /* {
syscallarg(char *) path;
#ifdef DOUBLE_ALIGN_PARAMS
syscallarg(int) pad;
#endif
syscallarg(off_t) length;
} */ nuap;
nuap.path = uap->path;
nuap.length = uap->length;
return (truncate(p, &nuap, retval));
}
/*
* Truncate a file given a file descriptor.
*/
struct oftruncate_args {
int fd;
long length;
};
/* ARGSUSED */
int
oftruncate(p, uap, retval)
struct proc *p;
register struct oftruncate_args *uap;
register_t *retval;
{
struct ftruncate_args /* {
syscallarg(int) fd;
#ifdef DOUBLE_ALIGN_PARAMS
syscallarg(int) pad;
#endif
syscallarg(off_t) length;
} */ nuap;
nuap.fd = uap->fd;
nuap.length = uap->length;
return (ftruncate(p, &nuap, retval));
}
#endif /* COMPAT_43 */
/*
* Sync an open file.
*/
struct fsync_args {
int fd;
};
/* ARGSUSED */
int
fsync(p, uap, retval)
struct proc *p;
struct fsync_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct file *fp;
int error;
if (error = getvnode(p, uap->fd, &fp))
return (error);
vp = (struct vnode *)fp->f_data;
#if MACH_NBC
mapfs_fsync(vp);
#endif
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p);
VOP_UNLOCK(vp, 0, p);
return (error);
}
/*
* Duplicate files. Source must be a file, target must be a file or
* must not exist.
*/
struct copyfile_args {
char *from;
char *to;
int mode;
int flags;
};
/* ARGSUSED */
int
copyfile(p, uap, retval)
struct proc *p;
register struct copyfile_args *uap;
register_t *retval;
{
register struct vnode *tvp, *fvp, *tdvp;
register struct ucred *cred = p->p_ucred;
struct nameidata fromnd, tond;
int error;
/* Check that the flags are valid.
*/
if (uap->flags & ~CPF_MASK) {
return(EINVAL);
}
NDINIT(&fromnd, LOOKUP, SAVESTART, UIO_USERSPACE,
uap->from, p);
if (error = namei(&fromnd))
return (error);
fvp = fromnd.ni_vp;
NDINIT(&tond, CREATE, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART,
UIO_USERSPACE, uap->to, p);
if (error = namei(&tond)) {
vrele(fvp);
goto out1;
}
tdvp = tond.ni_dvp;
tvp = tond.ni_vp;
if (tvp != NULL) {
if (!(uap->flags & CPF_OVERWRITE)) {
error = EEXIST;
goto out;
}
}
if (fvp->v_type == VDIR || (tvp && tvp->v_type == VDIR)) {
error = EISDIR;
goto out;
}
if (error = VOP_ACCESS(tdvp, VWRITE, cred, p))
goto out;
if (fvp == tdvp)
error = EINVAL;
/*
* If source is the same as the destination (that is the
* same inode number) then there is nothing to do.
* (fixed to have POSIX semantics - CSM 3/2/98)
*/
if (fvp == tvp)
error = -1;
out:
if (!error) {
error = VOP_COPYFILE(fvp,tdvp,tvp,&tond.ni_cnd,uap->mode,uap->flags);
} else {
VOP_ABORTOP(tdvp, &tond.ni_cnd);
if (tdvp == tvp)
vrele(tdvp);
else
vput(tdvp);
if (tvp)
vput(tvp);
vrele(fvp);
}
vrele(tond.ni_startdir);
FREE_ZONE(tond.ni_cnd.cn_pnbuf, tond.ni_cnd.cn_pnlen, M_NAMEI);
out1:
if (fromnd.ni_startdir)
vrele(fromnd.ni_startdir);
FREE_ZONE(fromnd.ni_cnd.cn_pnbuf, fromnd.ni_cnd.cn_pnlen, M_NAMEI);
if (error == -1)
return (0);
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.
*/
struct rename_args {
char *from;
char *to;
};
/* ARGSUSED */
int
rename(p, uap, retval)
struct proc *p;
register struct rename_args *uap;
register_t *retval;
{
register struct vnode *tvp, *fvp, *tdvp;
struct nameidata fromnd, tond;
int error;
NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,
uap->from, p);
if (error = namei(&fromnd))
return (error);
fvp = fromnd.ni_vp;
NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART,
UIO_USERSPACE, uap->to, p);
if (error = namei(&tond)) {
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) then there is nothing to do.
* (fixed to have POSIX semantics - CSM 3/2/98)
*/
if (fvp == tvp)
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);
FREE_ZONE(tond.ni_cnd.cn_pnbuf, tond.ni_cnd.cn_pnlen, M_NAMEI);
out1:
if (fromnd.ni_startdir)
vrele(fromnd.ni_startdir);
FREE_ZONE(fromnd.ni_cnd.cn_pnbuf, fromnd.ni_cnd.cn_pnlen, M_NAMEI);
if (error == -1)
return (0);
return (error);
}
/*
* Make a directory file.
*/
struct mkdir_args {
char *path;
int mode;
};
/* ARGSUSED */
int
mkdir(p, uap, retval)
struct proc *p;
register struct mkdir_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->path, p);
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 = (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);
return (error);
}
/*
* Remove a directory file.
*/
struct rmdir_args {
char *path;
};
/* ARGSUSED */
int
rmdir(p, uap, retval)
struct proc *p;
struct rmdir_args *uap;
register_t *retval;
{
register struct vnode *vp;
int error;
struct nameidata nd;
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,
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);
}
return (error);
}
#if COMPAT_43
/*
* Read a block of directory entries in a file system independent format.
*/
struct ogetdirentries_args {
int fd;
char *buf;
u_int count;
long *basep;
};
int
ogetdirentries(p, uap, retval)
struct proc *p;
register struct ogetdirentries_args *uap;
register_t *retval;
{
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, 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 = uap->buf;
aiov.iov_len = 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 = 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,
(int *)0, (u_long *)0);
fp->f_offset = auio.uio_offset;
} else
# endif
{
kuio = auio;
kuio.uio_iov = &kiov;
kuio.uio_segflg = UIO_SYSSPACE;
kiov.iov_len = uap->count;
MALLOC(dirbuf, caddr_t, uap->count, M_TEMP, M_WAITOK);
kiov.iov_base = dirbuf;
error = VOP_READDIR(vp, &kuio, fp->f_cred, &eofflag,
(int *)0, (u_long *)0);
fp->f_offset = kuio.uio_offset;
if (error == 0) {
readcnt = 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 UNION
{
extern int (**union_vnodeop_p)();
extern struct vnode *union_dircache __P((struct vnode*, struct proc*));
if ((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 ((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)uap->basep,
sizeof(long));
*retval = uap->count - auio.uio_resid;
return (error);
}
#endif /* COMPAT_43 */
/*
* Read a block of directory entries in a file system independent format.
*/
struct getdirentries_args {
int fd;
char *buf;
u_int count;
long *basep;
};
int
getdirentries(p, uap, retval)
struct proc *p;
register struct getdirentries_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct file *fp;
struct uio auio;
struct iovec aiov;
long loff;
int error, eofflag;
if (error = getvnode(p, 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 = uap->buf;
aiov.iov_len = 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 = uap->count;
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
loff = auio.uio_offset = fp->f_offset;
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag,
(int *)0, (u_long *)0);
fp->f_offset = auio.uio_offset;
VOP_UNLOCK(vp, 0, p);
if (error)
return (error);
#if UNION
{
extern int (**union_vnodeop_p)();
extern struct vnode *union_dircache __P((struct vnode*, struct proc*));
if ((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 ((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)uap->basep,
sizeof(long));
*retval = uap->count - auio.uio_resid;
return (error);
}
/*
* Set the mode mask for creation of filesystem nodes.
*/
struct umask_args {
int newmask;
};
int
umask(p, uap, retval)
struct proc *p;
struct umask_args *uap;
register_t *retval;
{
register struct filedesc *fdp;
fdp = p->p_fd;
*retval = fdp->fd_cmask;
fdp->fd_cmask = uap->newmask & ALLPERMS;
return (0);
}
/*
* Void all references to file by ripping underlying filesystem
* away from vnode.
*/
struct revoke_args {
char *path;
};
/* ARGSUSED */
int
revoke(p, uap, retval)
struct proc *p;
register struct revoke_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 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(p, fd, fpp)
struct proc *p;
int fd;
struct file **fpp;
{
struct file *fp;
int error;
if (error = fdgetf(p, fd, &fp))
return (error);
if (fp->f_type != DTYPE_VNODE)
return (EINVAL);
*fpp = fp;
return (0);
}
/*
* HFS/HFS PlUS SPECIFIC SYSTEM CALLS
* The following 10 system calls are designed to support features
* which are specific to the HFS & HFS Plus volume formats
*/
/*
* Make a complex file. A complex file is one with multiple forks (data streams)
*/
struct mkcomplex_args {
const char *path; /* pathname of the file to be created */
mode_t mode; /* access mode for the newly created file */
u_long type; /* format of the complex file */
};
/* ARGSUSED */
int
mkcomplex(p,uap,retval)
struct proc *p;
register struct mkcomplex_args *uap;
register_t *retval;
{
struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
/* mkcomplex wants the directory vnode locked so do that here */
NDINIT(&nd, CREATE, FOLLOW | LOCKPARENT, UIO_USERSPACE, uap->path, p);
if (error = namei(&nd))
return (error);
/* Set the attributes as specified by the user */
VATTR_NULL(&vattr);
vattr.va_mode = (uap->mode & ACCESSPERMS);
error = VOP_MKCOMPLEX(nd.ni_dvp, &vp, &nd.ni_cnd, &vattr, uap->type);
/* The mkcomplex call promises to release the parent vnode pointer
* even an an error case so don't do it here unless the operation
* is not supported. In that case, there isn't anyone to unlock the parent
* The vnode pointer to the file will also be released.
*/
if (error)
{
if (error == EOPNOTSUPP)
vput(nd.ni_dvp);
return (error);
}
return (0);
} /* end of mkcomplex system call */
/*
* Extended stat call which returns volumeid and vnodeid as well as other info
*/
struct statv_args {
const char *path; /* pathname of the target file */
struct vstat *vsb; /* vstat structure for returned info */
};
/* ARGSUSED */
int
statv(p,uap,retval)
struct proc *p;
register struct statv_args *uap;
register_t *retval;
{
return (EOPNOTSUPP); /* We'll just return an error for now */
} /* end of statv system call */
/*
* Extended lstat call which returns volumeid and vnodeid as well as other info
*/
struct lstatv_args {
const char *path; /* pathname of the target file */
struct vstat *vsb; /* vstat structure for returned info */
};
/* ARGSUSED */
int
lstatv(p,uap,retval)
struct proc *p;
register struct lstatv_args *uap;
register_t *retval;
{
return (EOPNOTSUPP); /* We'll just return an error for now */
} /* end of lstatv system call */
/*
* Extended fstat call which returns volumeid and vnodeid as well as other info
*/
struct fstatv_args {
int fd; /* file descriptor of the target file */
struct vstat *vsb; /* vstat structure for returned info */
};
/* ARGSUSED */
int
fstatv(p,uap,retval)
struct proc *p;
register struct fstatv_args *uap;
register_t *retval;
{
return (EOPNOTSUPP); /* We'll just return an error for now */
} /* end of fstatv system call */
/*
* Obtain attribute information about a file system object
*/
struct getattrlist_args {
const char *path; /* pathname of the target object */
struct attrlist * alist; /* Attributes desired by the user */
void * attributeBuffer; /* buffer to hold returned attributes */
size_t bufferSize; /* size of the return buffer */
unsigned long options; /* options (follow/don't follow) */
};
/* ARGSUSED */
int
getattrlist (p,uap,retval)
struct proc *p;
register struct getattrlist_args *uap;
register_t *retval;
{
int error;
struct nameidata nd;
struct iovec aiov;
struct uio auio;
struct attrlist attributelist;
u_long nameiflags;
/* Get the attributes desire and do our parameter checking */
if (error = copyin((caddr_t)uap->alist, (caddr_t) &attributelist,
sizeof (attributelist)))
{
return(error);
}
if (attributelist.bitmapcount != ATTR_BIT_MAP_COUNT
#if 0
|| attributelist.commonattr & ~ATTR_CMN_VALIDMASK ||
attributelist.volattr & ~ATTR_VOL_VALIDMASK ||
attributelist.dirattr & ~ATTR_DIR_VALIDMASK ||
attributelist.fileattr & ~ATTR_FILE_VALIDMASK ||
attributelist.forkattr & ~ATTR_FORK_VALIDMASK
#endif
)
{
return (EINVAL);
}
/* Get the vnode for the file we are getting info on. */
nameiflags = LOCKLEAF;
if ((uap->options & FSOPT_NOFOLLOW) == 0) nameiflags |= FOLLOW;
NDINIT(&nd, LOOKUP, nameiflags, UIO_USERSPACE, uap->path, p);
if (error = namei(&nd))
return (error);
/* Set up the UIO structure for use by the vfs routine */
aiov.iov_base = uap->attributeBuffer;
aiov.iov_len = uap->bufferSize;
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 = uap->bufferSize;
error = VOP_GETATTRLIST(nd.ni_vp, &attributelist, &auio, p->p_ucred, p);
/* Unlock and release the vnode which will have been locked by namei */
vput(nd.ni_vp);
/* return the effort if we got one, otherwise return success */
if (error)
{
return (error);
}
return(0);
} /* end of getattrlist system call */
/*
* Set attribute information about a file system object
*/
struct setattrlist_args {
const char *path; /* pathname of the target object */
struct attrlist * alist; /* Attributes being set by the user */
void * attributeBuffer; /* buffer with attribute values to be set */
size_t bufferSize; /* size of the return buffer */
unsigned long options; /* options (follow/don't follow) */
};
/* ARGSUSED */
int
setattrlist (p,uap,retval)
struct proc *p;
register struct setattrlist_args *uap;
register_t *retval;
{
int error;
struct nameidata nd;
struct iovec aiov;
struct uio auio;
struct attrlist attributelist;
u_long nameiflags;
/* Get the attributes desired and do our parameter checking */
if (error = copyin((caddr_t)uap->alist, (caddr_t) &attributelist,
sizeof (attributelist)))
{
return(error);
}
if (attributelist.bitmapcount != ATTR_BIT_MAP_COUNT
#if 0
|| attributelist.commonattr & ~ATTR_CMN_VALIDMASK ||
attributelist.volattr & ~ATTR_VOL_VALIDMASK ||
attributelist.dirattr & ~ATTR_DIR_VALIDMASK ||
attributelist.fileattr & ~ATTR_FILE_VALIDMASK ||
attributelist.forkattr & ~ATTR_FORK_VALIDMASK
#endif
)
{
return (EINVAL);
}
/* Get the vnode for the file we are getting info on. */
nameiflags = LOCKLEAF;
if ((uap->options & FSOPT_NOFOLLOW) == 0) nameiflags |= FOLLOW;
NDINIT(&nd, LOOKUP, nameiflags, UIO_USERSPACE, uap->path, p);
if (error = namei(&nd))
return (error);
/* Set up the UIO structure for use by the vfs routine */
aiov.iov_base = uap->attributeBuffer;
aiov.iov_len = uap->bufferSize;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_offset = 0;
auio.uio_rw = UIO_WRITE;
auio.uio_segflg = UIO_USERSPACE;
auio.uio_procp = p;
auio.uio_resid = uap->bufferSize;
error = VOP_SETATTRLIST(nd.ni_vp,&attributelist, &auio, p->p_ucred, p);
/* Unlock and release the vnode which will have been locked by namei */
vput(nd.ni_vp);
/* return the error if we got one, otherwise return success */
if (error)
{
return (error);
}
return(0);
} /* end of setattrlist system call */
/*
* Obtain attribute information on objects in a directory while enumerating
* the directory. This call does not yet support union mounted directories.
* TO DO
* 1.union mounted directories.
*/
struct getdirentriesattr_args {
int fd; /* file descriptor */
struct attrlist *alist; /* bit map of requested attributes */
void *buffer; /* buffer to hold returned attribute info */
size_t buffersize; /* size of the return buffer */
u_long *count; /* the count of entries requested/returned */
u_long *basep; /* the offset of where we are leaving off in buffer */
u_long *newstate; /* a flag to inform of changes in directory */
u_long options; /* maybe unused for now */
};
/* ARGSUSED */
int
getdirentriesattr (p,uap,retval)
struct proc *p;
register struct getdirentriesattr_args *uap;
register_t *retval;
{
register struct vnode *vp;
struct file *fp;
struct uio auio;
struct iovec aiov;
u_long actualcount;
u_long newstate;
int error, eofflag;
long loff;
struct attrlist attributelist;
/* Get the attributes into kernel space */
if (error = copyin((caddr_t)uap->alist, (caddr_t) &attributelist, sizeof (attributelist)))
return(error);
if (error = copyin((caddr_t)uap->count, (caddr_t) &actualcount, sizeof (u_long)))
return(error);
if (error = getvnode(p, uap->fd, &fp))
return (error);
if ((fp->f_flag & FREAD) == 0)
return(EBADF);
vp = (struct vnode *)fp->f_data;
if (vp->v_type != VDIR)
return(EINVAL);
/* set up the uio structure which will contain the users return buffer */
aiov.iov_base = uap->buffer;
aiov.iov_len = uap->buffersize;
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 = uap->buffersize;
loff = auio.uio_offset = fp->f_offset;
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
error = VOP_READDIRATTR (vp, &attributelist, &auio,
actualcount, uap->options, &newstate, &eofflag,
&actualcount, ((u_long **)0), p->p_cred);
VOP_UNLOCK(vp, 0, p);
if (error) return (error);
fp->f_offset = auio.uio_offset; /* should be multiple of dirent, not variable */
if (error = copyout((caddr_t) &actualcount, (caddr_t) uap->count, sizeof(u_long)))
return (error);
if (error = copyout((caddr_t) &newstate, (caddr_t) uap->newstate, sizeof(u_long)))
return (error);
if (error = copyout((caddr_t)&loff, (caddr_t)uap->basep, sizeof(long)))
return (error);
*retval = eofflag; /* similar to getdirentries */
return (0); /* return error earlier, an retval of 0 or 1 now */
} /* end of getdirentryattr system call */
/*
* Exchange data between two files
*/
struct exchangedata_args {
const char *path1; /* pathname of the first swapee */
const char *path2; /* pathname of the second swapee */
unsigned long options; /* options */
};
/* ARGSUSED */
int
exchangedata (p,uap,retval)
struct proc *p;
register struct exchangedata_args *uap;
register_t *retval;
{
struct nameidata fnd, snd;
struct vnode *fvp, *svp;
int error;
u_long nameiflags;
nameiflags = 0;
if ((uap->options & FSOPT_NOFOLLOW) == 0) nameiflags |= FOLLOW;
/* Global lock, to prevent race condition, only one exchange at a time */
lockmgr(&exchangelock, LK_EXCLUSIVE , (struct slock *)0, p);
NDINIT(&fnd, LOOKUP, nameiflags, UIO_USERSPACE, uap->path1, p);
if (error = namei(&fnd))
goto out2;
fvp = fnd.ni_vp;
NDINIT(&snd, LOOKUP, nameiflags, UIO_USERSPACE, uap->path2, p);
if (error = namei(&snd)) {
vrele(fvp);
goto out2;
}
svp = snd.ni_vp;
/* if the files are the same, return an inval error */
if (svp == fvp) {
vrele(fvp);
vrele(svp);
error = EINVAL;
goto out2;
}
vn_lock(fvp, LK_EXCLUSIVE | LK_RETRY, p);
vn_lock(svp, LK_EXCLUSIVE | LK_RETRY, p);
error = VOP_ACCESS(fvp, VWRITE, p->p_ucred, p);
if (error) goto out;
error = VOP_ACCESS(svp, VWRITE, p->p_ucred, p);
if (error) goto out;
/* Ok, make the call */
error = VOP_EXCHANGE (fvp, svp, p->p_ucred, p);
out:
vput (svp);
vput (fvp);
out2:
lockmgr(&exchangelock, LK_RELEASE, (struct slock *)0, p);
if (error) {
return (error);
}
return (0);
} /* end of exchangedata system call */
/*
* Check users access to a file
*/
struct checkuseraccess_args {
const char *path; /* pathname of the target file */
uid_t userid; /* user for whom we are checking access */
gid_t *groups; /* Group that we are checking for */
int ngroups; /* Number of groups being checked */
int accessrequired; /* needed access to the file */
unsigned long options; /* options */
};
/* ARGSUSED */
int
checkuseraccess (p,uap,retval)
struct proc *p;
register struct checkuseraccess_args *uap;
register_t *retval;
{
register struct vnode *vp;
int error;
struct nameidata nd;
struct ucred cred;
int flags; /*what will actually get passed to access*/
u_long nameiflags;
/* Make sure that the number of groups is correct before we do anything */
if (uap->ngroups > NGROUPS)
return (EINVAL);
/* Verify that the caller is root */
if (error = suser(p->p_ucred, &p->p_acflag))
return(error);
/* Fill in the credential structure */
cred.cr_ref = 0;
cred.cr_uid = uap->userid;
cred.cr_ngroups = uap->ngroups;
if (error = copyin((caddr_t) uap->groups, (caddr_t) &(cred.cr_groups), (sizeof(gid_t))*uap->ngroups))
return (error);
/* Get our hands on the file */
nameiflags = LOCKLEAF;
if ((uap->options & FSOPT_NOFOLLOW) == 0) nameiflags |= FOLLOW;
NDINIT(&nd, LOOKUP, nameiflags, UIO_USERSPACE, uap->path, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
/* Flags == 0 means only check for existence. */
flags = 0;
if (uap->accessrequired) {
if (uap->accessrequired & R_OK)
flags |= VREAD;
if (uap->accessrequired & W_OK)
flags |= VWRITE;
if (uap->accessrequired & X_OK)
flags |= VEXEC;
}
error = VOP_ACCESS(vp, flags, &cred, p);
vput(vp);
if (error)
return (error);
return (0);
} /* end of checkuseraccess system call */
struct searchfs_args {
const char *path;
struct fssearchblock *searchblock;
u_long *nummatches;
u_long scriptcode;
u_long options;
struct searchstate *state;
};
/* ARGSUSED */
int
searchfs (p,uap,retval)
struct proc *p;
register struct searchfs_args *uap;
register_t *retval;
{
register struct vnode *vp;
int error=0;
int fserror = 0;
struct nameidata nd;
struct fssearchblock searchblock;
struct searchstate *state;
struct attrlist *returnattrs;
void *searchparams1,*searchparams2;
struct iovec aiov;
struct uio auio;
u_long nummatches;
int mallocsize;
u_long nameiflags;
/* Start by copying in fsearchblock paramater list */
if (error = copyin((caddr_t) uap->searchblock, (caddr_t) &searchblock,sizeof(struct fssearchblock)))
return(error);
/* Now malloc a big bunch of space to hold the search parameters, the attrlists and the search state. */
/* It all has to do into local memory and it's not that big so we might as well put it all together. */
/* Searchparams1 shall be first so we might as well use that to hold the base address of the allocated*/
/* block. */
mallocsize = searchblock.sizeofsearchparams1+searchblock.sizeofsearchparams2 +
sizeof(struct attrlist) + sizeof(struct searchstate);
MALLOC(searchparams1, void *, mallocsize, M_TEMP, M_WAITOK);
/* Now set up the various pointers to the correct place in our newly allocated memory */
searchparams2 = (void *) (((caddr_t) searchparams1) + searchblock.sizeofsearchparams1);
returnattrs = (struct attrlist *) (((caddr_t) searchparams2) + searchblock.sizeofsearchparams2);
state = (struct searchstate *) (((caddr_t) returnattrs) + sizeof (struct attrlist));
/* Now copy in the stuff given our local variables. */
if (error = copyin((caddr_t) searchblock.searchparams1, searchparams1,searchblock.sizeofsearchparams1))
goto freeandexit;
if (error = copyin((caddr_t) searchblock.searchparams2, searchparams2,searchblock.sizeofsearchparams2))
goto freeandexit;
if (error = copyin((caddr_t) searchblock.returnattrs, (caddr_t) returnattrs, sizeof(struct attrlist)))
goto freeandexit;
if (error = copyin((caddr_t) uap->state, (caddr_t) state, sizeof(struct searchstate)))
goto freeandexit;
/* set up the uio structure which will contain the users return buffer */
aiov.iov_base = searchblock.returnbuffer;
aiov.iov_len = searchblock.returnbuffersize;
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 = searchblock.returnbuffersize;
nameiflags = LOCKLEAF;
if ((uap->options & FSOPT_NOFOLLOW) == 0) nameiflags |= FOLLOW;
NDINIT(&nd, LOOKUP, nameiflags, UIO_USERSPACE, uap->path, p);
if (error = namei(&nd))
goto freeandexit;
vp = nd.ni_vp;
/*
Allright, we have everything we need, so lets make that call.
We keep special track of the return value from the file system:
EAGAIN is an acceptable error condition that shouldn't keep us
from copying out any results...
*/
fserror = VOP_SEARCHFS(vp,
searchparams1,
searchparams2,
&searchblock.searchattrs,
searchblock.maxmatches,
&searchblock.timelimit,
returnattrs,
&nummatches,
uap->scriptcode,
uap->options,
&auio,
state);
vput(vp);
/* Now copy out the stuff that needs copying out. That means the number of matches, the
search state. Everything was already put into he return buffer by the vop call. */
if (error = copyout((caddr_t) state, (caddr_t) uap->state, sizeof(struct searchstate)))
goto freeandexit;
if (error = copyout((caddr_t) &nummatches, (caddr_t) uap->nummatches, sizeof(u_long)))
goto freeandexit;
error = fserror;
freeandexit:
FREE(searchparams1,M_TEMP);
return(error);
} /* end of searchfs system call */
/*
* Make a filesystem-specific control call:
*/
struct fsctl_args {
const char *path; /* pathname of the target object */
u_long cmd; /* cmd (also encodes size/direction of arguments a la ioctl) */
caddr_t data; /* pointer to argument buffer */
u_long options; /* options for fsctl processing */
};
/* ARGSUSED */
int
fsctl (p,uap,retval)
struct proc *p;
struct fsctl_args *uap;
register_t *retval;
{
int error;
struct nameidata nd;
u_long nameiflags;
u_long cmd = uap->cmd;
register u_int size;
#define STK_PARAMS 128
char stkbuf[STK_PARAMS];
caddr_t data, memp;
size = IOCPARM_LEN(cmd);
if (size > IOCPARM_MAX) return (EINVAL);
memp = NULL;
if (size > sizeof (stkbuf)) {
if ((memp = (caddr_t)kalloc(size)) == 0) return ENOMEM;
data = memp;
} else {
data = stkbuf;
};
if (cmd & IOC_IN) {
if (size) {
error = copyin(uap->data, data, (u_int)size);
if (error) goto FSCtl_Exit;
} else {
*(caddr_t *)data = uap->data;
};
} else if ((cmd & IOC_OUT) && size) {
/*
* Zero the buffer so the user always
* gets back something deterministic.
*/
bzero(data, size);
} else if (cmd & IOC_VOID)
*(caddr_t *)data = uap->data;
/* Get the vnode for the file we are getting info on: */
nameiflags = LOCKLEAF;
if ((uap->options & FSOPT_NOFOLLOW) == 0) nameiflags |= FOLLOW;
NDINIT(&nd, LOOKUP, nameiflags, UIO_USERSPACE, uap->path, p);
if (error = namei(&nd)) goto FSCtl_Exit;
/* Invoke the filesystem-specific code */
error = VOP_IOCTL(nd.ni_vp, IOCBASECMD(cmd), data, uap->options, p->p_ucred, p);
vput(nd.ni_vp);
/*
* Copy any data to user, size was
* already set and checked above.
*/
if (error == 0 && (cmd & IOC_OUT) && size) error = copyout(data, uap->data, (u_int)size);
FSCtl_Exit:
if (memp) kfree(memp, size);
return error;
}
/* end of fsctl system call */