4.4BSD/usr/src/sys/kern/vfs_syscalls.c
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* 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 8.1 (Berkeley) 6/14/93
*/
#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 <vm/vm.h>
#include <sys/sysctl.h>
/*
* Virtual File System System Calls
*/
/*
* Mount system call.
*/
struct mount_args {
int type;
char *dir;
int flags;
caddr_t data;
};
/* ARGSUSED */
mount(p, uap, retval)
struct proc *p;
register struct mount_args *uap;
int *retval;
{
register struct vnode *vp;
register struct mount *mp;
int error, flag;
struct nameidata nd;
/*
* Must be super user
*/
if (error = suser(p->p_ucred, &p->p_acflag))
return (error);
/*
* Get vnode to be covered
*/
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->dir, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
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);
VOP_UNLOCK(vp);
goto update;
}
if (vp->v_usecount != 1 && (uap->flags & MNT_UNION) == 0) {
vput(vp);
return (EBUSY);
}
if (error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0))
return (error);
if (vp->v_type != VDIR) {
vput(vp);
return (ENOTDIR);
}
if ((unsigned long)uap->type > MOUNT_MAXTYPE ||
vfssw[uap->type] == (struct vfsops *)0) {
vput(vp);
return (ENODEV);
}
/*
* Allocate and initialize the file system.
*/
mp = (struct mount *)malloc((u_long)sizeof(struct mount),
M_MOUNT, M_WAITOK);
bzero((char *)mp, (u_long)sizeof(struct mount));
mp->mnt_op = vfssw[uap->type];
if (error = vfs_lock(mp)) {
free((caddr_t)mp, M_MOUNT);
vput(vp);
return (error);
}
if (vp->v_mountedhere != (struct mount *)0) {
vfs_unlock(mp);
free((caddr_t)mp, M_MOUNT);
vput(vp);
return (EBUSY);
}
vp->v_mountedhere = mp;
mp->mnt_vnodecovered = vp;
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);
mp->mnt_flag |= uap->flags &
(MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION);
/*
* Mount the filesystem.
*/
error = VFS_MOUNT(mp, uap->dir, 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;
return (error);
}
/*
* Put the new filesystem on the mount list after root.
*/
mp->mnt_next = rootfs->mnt_next;
mp->mnt_prev = rootfs;
rootfs->mnt_next = mp;
mp->mnt_next->mnt_prev = mp;
cache_purge(vp);
if (!error) {
VOP_UNLOCK(vp);
vfs_unlock(mp);
error = VFS_START(mp, 0, p);
} else {
vfs_remove(mp);
free((caddr_t)mp, M_MOUNT);
vput(vp);
}
return (error);
}
/*
* Unmount system call.
*
* Note: unmount takes a path to the vnode mounted on as argument,
* not special file (as before).
*/
struct unmount_args {
char *pathp;
int flags;
};
/* ARGSUSED */
unmount(p, uap, retval)
struct proc *p;
register struct unmount_args *uap;
int *retval;
{
register struct vnode *vp;
struct mount *mp;
int error;
struct nameidata nd;
/*
* Must be super user
*/
if (error = suser(p->p_ucred, &p->p_acflag))
return (error);
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->pathp, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
/*
* Must be the root of the filesystem
*/
if ((vp->v_flag & VROOT) == 0) {
vput(vp);
return (EINVAL);
}
mp = vp->v_mount;
vput(vp);
return (dounmount(mp, uap->flags, p));
}
/*
* Do an unmount.
*/
dounmount(mp, flags, p)
register struct mount *mp;
int flags;
struct proc *p;
{
struct vnode *coveredvp;
int error;
coveredvp = mp->mnt_vnodecovered;
if (vfs_busy(mp))
return (EBUSY);
mp->mnt_flag |= MNT_UNMOUNT;
if (error = vfs_lock(mp))
return (error);
vnode_pager_umount(mp); /* release cached vnodes */
cache_purgevfs(mp); /* remove cache entries for this file sys */
if ((error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0 ||
(flags & MNT_FORCE))
error = VFS_UNMOUNT(mp, flags, p);
mp->mnt_flag &= ~MNT_UNMOUNT;
vfs_unbusy(mp);
if (error) {
vfs_unlock(mp);
} else {
vrele(coveredvp);
vfs_remove(mp);
if (mp->mnt_mounth != NULL)
panic("unmount: dangling vnode");
free((caddr_t)mp, M_MOUNT);
}
return (error);
}
/*
* Sync system call.
* Sync each mounted filesystem.
*/
#ifdef DIAGNOSTIC
int syncprt = 0;
struct ctldebug debug0 = { "syncprt", &syncprt };
#endif
struct sync_args {
int dummy;
};
/* ARGSUSED */
sync(p, uap, retval)
struct proc *p;
struct sync_args *uap;
int *retval;
{
register struct mount *mp;
struct mount *omp;
mp = rootfs;
do {
/*
* The lock check below is to avoid races with mount
* and unmount.
*/
if ((mp->mnt_flag & (MNT_MLOCK|MNT_RDONLY|MNT_MPBUSY)) == 0 &&
!vfs_busy(mp)) {
VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p);
omp = mp;
mp = mp->mnt_next;
vfs_unbusy(omp);
} else
mp = mp->mnt_next;
} while (mp != rootfs);
#ifdef DIAGNOSTIC
if (syncprt)
vfs_bufstats();
#endif /* DIAGNOSTIC */
return (0);
}
/*
* Operate on filesystem quotas.
*/
struct quotactl_args {
char *path;
int cmd;
int uid;
caddr_t arg;
};
/* ARGSUSED */
quotactl(p, uap, retval)
struct proc *p;
register struct quotactl_args *uap;
int *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 */
statfs(p, uap, retval)
struct proc *p;
register struct statfs_args *uap;
int *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 */
fstatfs(p, uap, retval)
struct proc *p;
register struct fstatfs_args *uap;
int *retval;
{
struct file *fp;
struct mount *mp;
register struct statfs *sp;
int error;
if (error = getvnode(p->p_fd, uap->fd, &fp))
return (error);
mp = ((struct vnode *)fp->f_data)->v_mount;
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;
};
getfsstat(p, uap, retval)
struct proc *p;
register struct getfsstat_args *uap;
int *retval;
{
register struct mount *mp;
register struct statfs *sp;
caddr_t sfsp;
long count, maxcount, error;
maxcount = uap->bufsize / sizeof(struct statfs);
sfsp = (caddr_t)uap->buf;
mp = rootfs;
count = 0;
do {
if (sfsp && count < maxcount &&
((mp->mnt_flag & MNT_MLOCK) == 0)) {
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))) {
mp = mp->mnt_prev;
continue;
}
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
if (error = copyout((caddr_t)sp, sfsp, sizeof(*sp)))
return (error);
sfsp += sizeof(*sp);
}
count++;
mp = mp->mnt_prev;
} while (mp != rootfs);
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 */
fchdir(p, uap, retval)
struct proc *p;
struct fchdir_args *uap;
int *retval;
{
register struct filedesc *fdp = p->p_fd;
register struct vnode *vp;
struct file *fp;
int error;
if (error = getvnode(fdp, uap->fd, &fp))
return (error);
vp = (struct vnode *)fp->f_data;
VOP_LOCK(vp);
if (vp->v_type != VDIR)
error = ENOTDIR;
else
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
VOP_UNLOCK(vp);
if (error)
return (error);
VREF(vp);
vrele(fdp->fd_cdir);
fdp->fd_cdir = vp;
return (0);
}
/*
* Change current working directory (``.'').
*/
struct chdir_args {
char *fname;
};
/* ARGSUSED */
chdir(p, uap, retval)
struct proc *p;
struct chdir_args *uap;
int *retval;
{
register struct filedesc *fdp = p->p_fd;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p);
if (error = chdirec(&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 *fname;
};
/* ARGSUSED */
chroot(p, uap, retval)
struct proc *p;
struct chroot_args *uap;
int *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->fname, p);
if (error = chdirec(&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.
*/
chdirec(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);
VOP_UNLOCK(vp);
if (error)
vrele(vp);
return (error);
}
/*
* Open system call.
* Check permissions, allocate an open file structure,
* and call the device open routine if any.
*/
struct open_args {
char *fname;
int mode;
int crtmode;
};
open(p, uap, retval)
struct proc *p;
register struct open_args *uap;
int *retval;
{
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
register struct vnode *vp;
int fmode, cmode;
struct file *nfp;
int type, indx, error;
struct flock lf;
struct nameidata nd;
extern struct fileops vnops;
if (error = falloc(p, &nfp, &indx))
return (error);
fp = nfp;
fmode = FFLAGS(uap->mode);
cmode = ((uap->crtmode &~ fdp->fd_cmask) & 07777) &~ S_ISVTX;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p);
p->p_dupfd = -indx - 1; /* XXX check for fdopen */
if (error = vn_open(&nd, fmode, cmode)) {
ffree(fp);
if ((error == ENODEV || error == ENXIO) &&
p->p_dupfd >= 0 && /* XXX from fdopen */
(error = dupfdopen(fdp, indx, p->p_dupfd,
fmode, error)) == 0) {
*retval = indx;
return (0);
}
if (error == ERESTART)
error = EINTR;
fdp->fd_ofiles[indx] = NULL;
return (error);
}
p->p_dupfd = 0;
vp = nd.ni_vp;
fp->f_flag = fmode & FMASK;
fp->f_type = DTYPE_VNODE;
fp->f_ops = &vnops;
fp->f_data = (caddr_t)vp;
if (fmode & (O_EXLOCK | O_SHLOCK)) {
lf.l_whence = SEEK_SET;
lf.l_start = 0;
lf.l_len = 0;
if (fmode & O_EXLOCK)
lf.l_type = F_WRLCK;
else
lf.l_type = F_RDLCK;
type = F_FLOCK;
if ((fmode & FNONBLOCK) == 0)
type |= F_WAIT;
if (error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) {
VOP_UNLOCK(vp);
(void) vn_close(vp, fp->f_flag, fp->f_cred, p);
ffree(fp);
fdp->fd_ofiles[indx] = NULL;
return (error);
}
fp->f_flag |= FHASLOCK;
}
VOP_UNLOCK(vp);
*retval = indx;
return (0);
}
#ifdef COMPAT_43
/*
* Creat system call.
*/
struct ocreat_args {
char *fname;
int fmode;
};
ocreat(p, uap, retval)
struct proc *p;
register struct ocreat_args *uap;
int *retval;
{
struct open_args openuap;
openuap.fname = uap->fname;
openuap.crtmode = uap->fmode;
openuap.mode = O_WRONLY | O_CREAT | O_TRUNC;
return (open(p, &openuap, retval));
}
#endif /* COMPAT_43 */
/*
* Mknod system call.
*/
struct mknod_args {
char *fname;
int fmode;
int dev;
};
/* ARGSUSED */
mknod(p, uap, retval)
struct proc *p;
register struct mknod_args *uap;
int *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
if (error = suser(p->p_ucred, &p->p_acflag))
return (error);
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->fname, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
if (vp != NULL) {
error = EEXIST;
goto out;
}
VATTR_NULL(&vattr);
switch (uap->fmode & 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;
default:
error = EINVAL;
goto out;
}
vattr.va_mode = (uap->fmode & 07777) &~ p->p_fd->fd_cmask;
vattr.va_rdev = uap->dev;
out:
if (!error) {
LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
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);
}
/*
* Mkfifo system call.
*/
struct mkfifo_args {
char *fname;
int fmode;
};
/* ARGSUSED */
mkfifo(p, uap, retval)
struct proc *p;
register struct mkfifo_args *uap;
int *retval;
{
struct vattr vattr;
int error;
struct nameidata nd;
#ifndef FIFO
return (EOPNOTSUPP);
#else
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->fname, 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->fmode & 07777) &~ p->p_fd->fd_cmask;
LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
return (VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr));
#endif /* FIFO */
}
/*
* Link system call.
*/
struct link_args {
char *target;
char *linkname;
};
/* ARGSUSED */
link(p, uap, retval)
struct proc *p;
register struct link_args *uap;
int *retval;
{
register struct vnode *vp, *xp;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->target, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
if (vp->v_type == VDIR &&
(error = suser(p->p_ucred, &p->p_acflag)))
goto out1;
nd.ni_cnd.cn_nameiop = CREATE;
nd.ni_cnd.cn_flags = LOCKPARENT;
nd.ni_dirp = (caddr_t)uap->linkname;
if (error = namei(&nd))
goto out1;
xp = nd.ni_vp;
if (xp != NULL) {
error = EEXIST;
goto out;
}
xp = nd.ni_dvp;
out:
if (!error) {
LEASE_CHECK(xp, p, p->p_ucred, LEASE_WRITE);
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
error = VOP_LINK(nd.ni_dvp, vp, &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);
}
out1:
vrele(vp);
return (error);
}
/*
* Make a symbolic link.
*/
struct symlink_args {
char *target;
char *linkname;
};
/* ARGSUSED */
symlink(p, uap, retval)
struct proc *p;
register struct symlink_args *uap;
int *retval;
{
struct vattr vattr;
char *target;
int error;
struct nameidata nd;
MALLOC(target, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
if (error = copyinstr(uap->target, target, MAXPATHLEN, (u_int *)0))
goto out;
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->linkname, 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 = 0777 &~ p->p_fd->fd_cmask;
LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, target);
out:
FREE(target, M_NAMEI);
return (error);
}
/*
* Delete a name from the filesystem.
*/
struct unlink_args {
char *name;
};
/* ARGSUSED */
unlink(p, uap, retval)
struct proc *p;
struct unlink_args *uap;
int *retval;
{
register struct vnode *vp;
int error;
struct nameidata nd;
NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, uap->name, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
VOP_LOCK(vp);
if (vp->v_type == VDIR &&
(error = suser(p->p_ucred, &p->p_acflag)))
goto out;
/*
* The root of a mounted filesystem cannot be deleted.
*/
if (vp->v_flag & VROOT) {
error = EBUSY;
goto out;
}
(void) vnode_pager_uncache(vp);
out:
if (!error) {
LEASE_CHECK(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);
vput(vp);
}
return (error);
}
struct lseek_args {
int fdes;
int pad;
off_t off;
int sbase;
};
/*
* Seek system call.
*/
lseek(p, uap, retval)
struct proc *p;
register struct lseek_args *uap;
int *retval;
{
struct ucred *cred = p->p_ucred;
register struct filedesc *fdp = p->p_fd;
register struct file *fp;
struct vattr vattr;
int error;
if ((unsigned)uap->fdes >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[uap->fdes]) == NULL)
return (EBADF);
if (fp->f_type != DTYPE_VNODE)
return (ESPIPE);
switch (uap->sbase) {
case L_INCR:
fp->f_offset += uap->off;
break;
case L_XTND:
if (error = VOP_GETATTR((struct vnode *)fp->f_data,
&vattr, cred, p))
return (error);
fp->f_offset = uap->off + vattr.va_size;
break;
case L_SET:
fp->f_offset = uap->off;
break;
default:
return (EINVAL);
}
*(off_t *)retval = fp->f_offset;
return (0);
}
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
/*
* Old lseek system call.
*/
struct olseek_args {
int fdes;
long off;
int sbase;
};
olseek(p, uap, retval)
struct proc *p;
register struct olseek_args *uap;
int *retval;
{
struct lseek_args nuap;
off_t qret;
int error;
nuap.fdes = uap->fdes;
nuap.off = uap->off;
nuap.sbase = uap->sbase;
error = lseek(p, &nuap, &qret);
*(long *)retval = qret;
return (error);
}
#endif /* COMPAT_43 */
/*
* Check access permissions.
*/
struct access_args {
char *fname;
int fmode;
};
access(p, uap, retval)
struct proc *p;
register struct access_args *uap;
int *retval;
{
register struct ucred *cred = p->p_ucred;
register struct vnode *vp;
int error, mode, svuid, svgid;
struct nameidata nd;
svuid = cred->cr_uid;
svgid = 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->fname, p);
if (error = namei(&nd))
goto out1;
vp = nd.ni_vp;
/*
* fmode == 0 means only check for exist
*/
if (uap->fmode) {
mode = 0;
if (uap->fmode & R_OK)
mode |= VREAD;
if (uap->fmode & W_OK)
mode |= VWRITE;
if (uap->fmode & X_OK)
mode |= VEXEC;
if ((mode & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
error = VOP_ACCESS(vp, mode, cred, p);
}
vput(vp);
out1:
cred->cr_uid = svuid;
cred->cr_groups[0] = svgid;
return (error);
}
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
/*
* Stat system call.
* This version follows links.
*/
struct ostat_args {
char *fname;
struct ostat *ub;
};
/* ARGSUSED */
ostat(p, uap, retval)
struct proc *p;
register struct ostat_args *uap;
int *retval;
{
struct stat sb;
struct ostat osb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, 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);
}
/*
* Lstat system call.
* This version does not follow links.
*/
struct olstat_args {
char *fname;
struct ostat *ub;
};
/* ARGSUSED */
olstat(p, uap, retval)
struct proc *p;
register struct olstat_args *uap;
int *retval;
{
struct stat sb;
struct ostat osb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, 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);
}
/*
* convert from an old to a new stat structure.
*/
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 */
/*
* Stat system call.
* This version follows links.
*/
struct stat_args {
char *fname;
struct stat *ub;
};
/* ARGSUSED */
stat(p, uap, retval)
struct proc *p;
register struct stat_args *uap;
int *retval;
{
struct stat sb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, 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);
}
/*
* Lstat system call.
* This version does not follow links.
*/
struct lstat_args {
char *fname;
struct stat *ub;
};
/* ARGSUSED */
lstat(p, uap, retval)
struct proc *p;
register struct lstat_args *uap;
int *retval;
{
int error;
struct vnode *vp, *dvp;
struct stat sb, sb1;
struct nameidata nd;
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE,
uap->fname, 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;
}
error = copyout((caddr_t)&sb, (caddr_t)uap->ub, sizeof (sb));
return (error);
}
/*
* Pathconf system call.
*/
struct pathconf_args {
char *fname;
int name;
};
/* ARGSUSED */
pathconf(p, uap, retval)
struct proc *p;
register struct pathconf_args *uap;
int *retval;
{
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, 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 *name;
char *buf;
int count;
};
/* ARGSUSED */
readlink(p, uap, retval)
struct proc *p;
register struct readlink_args *uap;
int *retval;
{
register struct vnode *vp;
struct iovec aiov;
struct uio auio;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, uap->name, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
if (vp->v_type != VLNK) {
error = EINVAL;
goto out;
}
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);
out:
vput(vp);
*retval = uap->count - auio.uio_resid;
return (error);
}
/*
* Change flags of a file given path name.
*/
struct chflags_args {
char *fname;
int flags;
};
/* ARGSUSED */
chflags(p, uap, retval)
struct proc *p;
register struct chflags_args *uap;
int *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
VOP_LOCK(vp);
if (vp->v_mount->mnt_flag & MNT_RDONLY) {
error = EROFS;
goto out;
}
VATTR_NULL(&vattr);
vattr.va_flags = uap->flags;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
out:
vput(vp);
return (error);
}
/*
* Change flags of a file given a file descriptor.
*/
struct fchflags_args {
int fd;
int flags;
};
/* ARGSUSED */
fchflags(p, uap, retval)
struct proc *p;
register struct fchflags_args *uap;
int *retval;
{
struct vattr vattr;
struct vnode *vp;
struct file *fp;
int error;
if (error = getvnode(p->p_fd, uap->fd, &fp))
return (error);
vp = (struct vnode *)fp->f_data;
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
VOP_LOCK(vp);
if (vp->v_mount->mnt_flag & MNT_RDONLY) {
error = EROFS;
goto out;
}
VATTR_NULL(&vattr);
vattr.va_flags = uap->flags;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
out:
VOP_UNLOCK(vp);
return (error);
}
/*
* Change mode of a file given path name.
*/
struct chmod_args {
char *fname;
int fmode;
};
/* ARGSUSED */
chmod(p, uap, retval)
struct proc *p;
register struct chmod_args *uap;
int *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
VOP_LOCK(vp);
if (vp->v_mount->mnt_flag & MNT_RDONLY) {
error = EROFS;
goto out;
}
VATTR_NULL(&vattr);
vattr.va_mode = uap->fmode & 07777;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
out:
vput(vp);
return (error);
}
/*
* Change mode of a file given a file descriptor.
*/
struct fchmod_args {
int fd;
int fmode;
};
/* ARGSUSED */
fchmod(p, uap, retval)
struct proc *p;
register struct fchmod_args *uap;
int *retval;
{
struct vattr vattr;
struct vnode *vp;
struct file *fp;
int error;
if (error = getvnode(p->p_fd, uap->fd, &fp))
return (error);
vp = (struct vnode *)fp->f_data;
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
VOP_LOCK(vp);
if (vp->v_mount->mnt_flag & MNT_RDONLY) {
error = EROFS;
goto out;
}
VATTR_NULL(&vattr);
vattr.va_mode = uap->fmode & 07777;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
out:
VOP_UNLOCK(vp);
return (error);
}
/*
* Set ownership given a path name.
*/
struct chown_args {
char *fname;
int uid;
int gid;
};
/* ARGSUSED */
chown(p, uap, retval)
struct proc *p;
register struct chown_args *uap;
int *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, uap->fname, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
VOP_LOCK(vp);
if (vp->v_mount->mnt_flag & MNT_RDONLY) {
error = EROFS;
goto out;
}
VATTR_NULL(&vattr);
vattr.va_uid = uap->uid;
vattr.va_gid = uap->gid;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
out:
vput(vp);
return (error);
}
/*
* Set ownership given a file descriptor.
*/
struct fchown_args {
int fd;
int uid;
int gid;
};
/* ARGSUSED */
fchown(p, uap, retval)
struct proc *p;
register struct fchown_args *uap;
int *retval;
{
struct vattr vattr;
struct vnode *vp;
struct file *fp;
int error;
if (error = getvnode(p->p_fd, uap->fd, &fp))
return (error);
vp = (struct vnode *)fp->f_data;
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
VOP_LOCK(vp);
if (vp->v_mount->mnt_flag & MNT_RDONLY) {
error = EROFS;
goto out;
}
VATTR_NULL(&vattr);
vattr.va_uid = uap->uid;
vattr.va_gid = uap->gid;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
out:
VOP_UNLOCK(vp);
return (error);
}
/*
* Set the access and modification times of a file.
*/
struct utimes_args {
char *fname;
struct timeval *tptr;
};
/* ARGSUSED */
utimes(p, uap, retval)
struct proc *p;
register struct utimes_args *uap;
int *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->fname, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
VOP_LOCK(vp);
if (vp->v_mount->mnt_flag & MNT_RDONLY) {
error = EROFS;
goto out;
}
vattr.va_atime.ts_sec = tv[0].tv_sec;
vattr.va_atime.ts_nsec = tv[0].tv_usec * 1000;
vattr.va_mtime.ts_sec = tv[1].tv_sec;
vattr.va_mtime.ts_nsec = tv[1].tv_usec * 1000;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
out:
vput(vp);
return (error);
}
struct truncate_args {
char *fname;
int pad;
off_t length;
};
/*
* Truncate a file given its path name.
*/
/* ARGSUSED */
truncate(p, uap, retval)
struct proc *p;
register struct truncate_args *uap;
int *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p);
if (error = namei(&nd))
return (error);
vp = nd.ni_vp;
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
VOP_LOCK(vp);
if (vp->v_type == VDIR) {
error = EISDIR;
goto out;
}
if ((error = vn_writechk(vp)) ||
(error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)))
goto out;
VATTR_NULL(&vattr);
vattr.va_size = uap->length;
error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
out:
vput(vp);
return (error);
}
struct ftruncate_args {
int fd;
int pad;
off_t length;
};
/*
* Truncate a file given a file descriptor.
*/
/* ARGSUSED */
ftruncate(p, uap, retval)
struct proc *p;
register struct ftruncate_args *uap;
int *retval;
{
struct vattr vattr;
struct vnode *vp;
struct file *fp;
int error;
if (error = getvnode(p->p_fd, uap->fd, &fp))
return (error);
if ((fp->f_flag & FWRITE) == 0)
return (EINVAL);
vp = (struct vnode *)fp->f_data;
LEASE_CHECK(vp, p, p->p_ucred, LEASE_WRITE);
VOP_LOCK(vp);
if (vp->v_type == VDIR) {
error = EISDIR;
goto out;
}
if (error = vn_writechk(vp))
goto out;
VATTR_NULL(&vattr);
vattr.va_size = uap->length;
error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);
out:
VOP_UNLOCK(vp);
return (error);
}
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
/*
* Truncate a file given its path name.
*/
struct otruncate_args {
char *fname;
long length;
};
/* ARGSUSED */
otruncate(p, uap, retval)
struct proc *p;
register struct otruncate_args *uap;
int *retval;
{
struct truncate_args nuap;
nuap.fname = uap->fname;
nuap.length = uap->length;
return (truncate(p, &nuap, retval));
}
/*
* Truncate a file given a file descriptor.
*/
struct oftruncate_args {
int fd;
long length;
};
/* ARGSUSED */
oftruncate(p, uap, retval)
struct proc *p;
register struct oftruncate_args *uap;
int *retval;
{
struct ftruncate_args nuap;
nuap.fd = uap->fd;
nuap.length = uap->length;
return (ftruncate(p, &nuap, retval));
}
#endif /* COMPAT_43 || COMPAT_SUNOS */
/*
* Synch an open file.
*/
struct fsync_args {
int fd;
};
/* ARGSUSED */
fsync(p, uap, retval)
struct proc *p;
struct fsync_args *uap;
int *retval;
{
register struct vnode *vp;
struct file *fp;
int error;
if (error = getvnode(p->p_fd, uap->fd, &fp))
return (error);
vp = (struct vnode *)fp->f_data;
VOP_LOCK(vp);
error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p);
VOP_UNLOCK(vp);
return (error);
}
/*
* Rename system call.
*
* 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 */
rename(p, uap, retval)
struct proc *p;
register struct rename_args *uap;
int *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 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) {
LEASE_CHECK(tdvp, p, p->p_ucred, LEASE_WRITE);
if (fromnd.ni_dvp != tdvp)
LEASE_CHECK(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
if (tvp)
LEASE_CHECK(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(tond.ni_cnd.cn_pnbuf, M_NAMEI);
out1:
vrele(fromnd.ni_startdir);
FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);
if (error == -1)
return (0);
return (error);
}
/*
* Mkdir system call.
*/
struct mkdir_args {
char *name;
int dmode;
};
/* ARGSUSED */
mkdir(p, uap, retval)
struct proc *p;
register struct mkdir_args *uap;
int *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, uap->name, 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->dmode & 0777) &~ p->p_fd->fd_cmask;
LEASE_CHECK(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);
}
/*
* Rmdir system call.
*/
struct rmdir_args {
char *name;
};
/* ARGSUSED */
rmdir(p, uap, retval)
struct proc *p;
struct rmdir_args *uap;
int *retval;
{
register struct vnode *vp;
int error;
struct nameidata nd;
NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, uap->name, 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) {
LEASE_CHECK(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);
LEASE_CHECK(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);
}
#ifdef COMPAT_43
/*
* Read a block of directory entries in a file system independent format.
*/
struct ogetdirentries_args {
int fd;
char *buf;
unsigned count;
long *basep;
};
ogetdirentries(p, uap, retval)
struct proc *p;
register struct ogetdirentries_args *uap;
int *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, readcnt;
long loff;
if (error = getvnode(p->p_fd, 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);
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;
VOP_LOCK(vp);
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);
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);
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);
if (error)
return (error);
error = copyout((caddr_t)&loff, (caddr_t)uap->basep, sizeof(long));
*retval = uap->count - auio.uio_resid;
return (error);
}
#endif
/*
* Read a block of directory entries in a file system independent format.
*/
struct getdirentries_args {
int fd;
char *buf;
unsigned count;
long *basep;
};
getdirentries(p, uap, retval)
struct proc *p;
register struct getdirentries_args *uap;
int *retval;
{
register struct vnode *vp;
struct file *fp;
struct uio auio;
struct iovec aiov;
long loff;
int error;
if (error = getvnode(p->p_fd, 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;
VOP_LOCK(vp);
loff = auio.uio_offset = fp->f_offset;
error = VOP_READDIR(vp, &auio, fp->f_cred);
fp->f_offset = auio.uio_offset;
VOP_UNLOCK(vp);
if (error)
return (error);
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 mask;
};
mode_t /* XXX */
umask(p, uap, retval)
struct proc *p;
struct umask_args *uap;
int *retval;
{
register struct filedesc *fdp = p->p_fd;
*retval = fdp->fd_cmask;
fdp->fd_cmask = uap->mask & 07777;
return (0);
}
/*
* Void all references to file by ripping underlying filesystem
* away from vnode.
*/
struct revoke_args {
char *fname;
};
/* ARGSUSED */
revoke(p, uap, retval)
struct proc *p;
register struct revoke_args *uap;
int *retval;
{
register struct vnode *vp;
struct vattr vattr;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->fname, p);
if (error = namei(&nd))
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))
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))
vgoneall(vp);
out:
vrele(vp);
return (error);
}
/*
* Convert a user file descriptor to a kernel file entry.
*/
getvnode(fdp, fdes, fpp)
struct filedesc *fdp;
struct file **fpp;
int fdes;
{
struct file *fp;
if ((unsigned)fdes >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fdes]) == NULL)
return (EBADF);
if (fp->f_type != DTYPE_VNODE)
return (EINVAL);
*fpp = fp;
return (0);
}