NetBSD/sys/kern/vfs_xattr.c

1084 lines
26 KiB
C

/* $NetBSD: vfs_xattr.c,v 1.12 2007/04/03 16:11:31 hannken Exp $ */
/*-
* Copyright (c) 2005 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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. 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 extended attribute support.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vfs_xattr.c,v 1.12 2007/04/03 16:11:31 hannken Exp $");
#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/vnode.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/extattr.h>
#include <sys/xattr.h>
#include <sys/sysctl.h>
#include <sys/syscallargs.h>
#include <sys/kauth.h>
/*
* Credential check based on process requesting service, and per-attribute
* permissions.
*
* NOTE: Vnode must be locked.
*/
int
extattr_check_cred(struct vnode *vp, int attrnamespace,
kauth_cred_t cred, struct lwp *l, int access)
{
if (cred == NOCRED)
return (0);
switch (attrnamespace) {
case EXTATTR_NAMESPACE_SYSTEM:
/*
* Do we really want to allow this, or just require that
* these requests come from kernel code (NOCRED case above)?
*/
return (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER,
NULL));
case EXTATTR_NAMESPACE_USER:
return (VOP_ACCESS(vp, access, cred, l));
default:
return (EPERM);
}
}
/*
* Default vfs_extattrctl routine for file systems that do not support
* it.
*/
/*ARGSUSED*/
int
vfs_stdextattrctl(struct mount *mp, int cmt, struct vnode *vp,
int attrnamespace, const char *attrname, struct lwp *l)
{
if (vp != NULL)
VOP_UNLOCK(vp, 0);
return (EOPNOTSUPP);
}
/*
* Push extended attribute configuration information into the file
* system.
*
* NOTE: Not all file systems that support extended attributes will
* require the use of this system call.
*/
int
sys_extattrctl(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattrctl_args /* {
syscallarg(const char *) path;
syscallarg(int) cmd;
syscallarg(const char *) filename;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
} */ *uap = v;
struct vnode *vp;
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
if (SCARG(uap, attrname) != NULL) {
error = copyinstr(SCARG(uap, attrname), attrname,
sizeof(attrname), NULL);
if (error)
return (error);
}
vp = NULL;
if (SCARG(uap, filename) != NULL) {
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
SCARG(uap, filename), l);
error = namei(&nd);
if (error)
return (error);
vp = nd.ni_vp;
}
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error) {
if (vp != NULL)
vput(vp);
return (error);
}
error = VFS_EXTATTRCTL(nd.ni_vp->v_mount, SCARG(uap, cmd), vp,
SCARG(uap, attrnamespace),
SCARG(uap, attrname) != NULL ? attrname : NULL, l);
if (vp != NULL)
vrele(vp);
return (error);
}
/*****************************************************************************
* Internal routines to manipulate file system extended attributes:
* - set
* - get
* - delete
* - list
*****************************************************************************/
/*
* extattr_set_vp:
*
* Set a named extended attribute on a file or directory.
*/
static int
extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname,
const void *data, size_t nbytes, struct lwp *l, register_t *retval)
{
struct uio auio;
struct iovec aiov;
ssize_t cnt;
int error;
VOP_LEASE(vp, l, l->l_cred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
aiov.iov_base = __UNCONST(data); /* XXXUNCONST kills const */
aiov.iov_len = nbytes;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_offset = 0;
if (nbytes > INT_MAX) {
error = EINVAL;
goto done;
}
auio.uio_resid = nbytes;
auio.uio_rw = UIO_WRITE;
KASSERT(l == curlwp);
auio.uio_vmspace = l->l_proc->p_vmspace;
cnt = nbytes;
error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio,
l->l_cred, l);
cnt -= auio.uio_resid;
retval[0] = cnt;
done:
VOP_UNLOCK(vp, 0);
return (error);
}
/*
* extattr_get_vp:
*
* Get a named extended attribute on a file or directory.
*/
static int
extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname,
void *data, size_t nbytes, struct lwp *l, register_t *retval)
{
struct uio auio, *auiop;
struct iovec aiov;
ssize_t cnt;
size_t size, *sizep;
int error;
VOP_LEASE(vp, l, l->l_cred, LEASE_READ);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
/*
* Slightly unusual semantics: if the user provides a NULL data
* pointer, they don't want to receive the data, just the maximum
* read length.
*/
auiop = NULL;
sizep = NULL;
cnt = 0;
if (data != NULL) {
aiov.iov_base = data;
aiov.iov_len = nbytes;
auio.uio_iov = &aiov;
auio.uio_offset = 0;
if (nbytes > INT_MAX) {
error = EINVAL;
goto done;
}
auio.uio_resid = nbytes;
auio.uio_rw = UIO_READ;
KASSERT(l == curlwp);
auio.uio_vmspace = l->l_proc->p_vmspace;
auiop = &auio;
cnt = nbytes;
} else
sizep = &size;
error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep,
l->l_cred, l);
if (auiop != NULL) {
cnt -= auio.uio_resid;
retval[0] = cnt;
} else
retval[0] = size;
done:
VOP_UNLOCK(vp, 0);
return (error);
}
/*
* extattr_delete_vp:
*
* Delete a named extended attribute on a file or directory.
*/
static int
extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname,
struct lwp *l)
{
int error;
VOP_LEASE(vp, l, l->l_cred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, l->l_cred, l);
if (error == EOPNOTSUPP)
error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL,
l->l_cred, l);
VOP_UNLOCK(vp, 0);
return (error);
}
/*
* extattr_list_vp:
*
* Retrieve a list of extended attributes on a file or directory.
*/
static int
extattr_list_vp(struct vnode *vp, int attrnamespace, void *data, size_t nbytes,
struct lwp *l, register_t *retval)
{
struct uio auio, *auiop;
size_t size, *sizep;
struct iovec aiov;
ssize_t cnt;
int error;
VOP_LEASE(vp, l, l->l_cred, LEASE_READ);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
auiop = NULL;
sizep = NULL;
cnt = 0;
if (data != NULL) {
aiov.iov_base = data;
aiov.iov_len = nbytes;
auio.uio_iov = &aiov;
auio.uio_offset = 0;
if (nbytes > INT_MAX) {
error = EINVAL;
goto done;
}
auio.uio_resid = nbytes;
auio.uio_rw = UIO_READ;
KASSERT(l == curlwp);
auio.uio_vmspace = l->l_proc->p_vmspace;
auiop = &auio;
cnt = nbytes;
} else
sizep = &size;
error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep,
l->l_cred, l);
if (auiop != NULL) {
cnt -= auio.uio_resid;
retval[0] = cnt;
} else
retval[0] = size;
done:
VOP_UNLOCK(vp, 0);
return (error);
}
/*****************************************************************************
* BSD <sys/extattr.h> API for file system extended attributes
*****************************************************************************/
int
sys_extattr_set_fd(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_set_fd_args /* {
syscallarg(int) fd;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
syscallarg(const void *) data;
syscallarg(size_t) nbytes;
} */ *uap = v;
struct file *fp;
struct vnode *vp;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp);
if (error)
return (error);
vp = (struct vnode *) fp->f_data;
error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname,
SCARG(uap, data), SCARG(uap, nbytes), l, retval);
FILE_UNUSE(fp, l);
return (error);
}
int
sys_extattr_set_file(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_set_file_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
syscallarg(const void *) data;
syscallarg(size_t) nbytes;
} */ *uap = v;
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
SCARG(uap, data), SCARG(uap, nbytes), l, retval);
vrele(nd.ni_vp);
return (error);
}
int
sys_extattr_set_link(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_set_link_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
syscallarg(const void *) data;
syscallarg(size_t) nbytes;
} */ *uap = v;
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
SCARG(uap, data), SCARG(uap, nbytes), l, retval);
vrele(nd.ni_vp);
return (error);
}
int
sys_extattr_get_fd(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_get_fd_args /* {
syscallarg(int) fd;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
syscallarg(void *) data;
syscallarg(size_t) nbytes;
} */ *uap = v;
struct file *fp;
struct vnode *vp;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp);
if (error)
return (error);
vp = (struct vnode *) fp->f_data;
error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname,
SCARG(uap, data), SCARG(uap, nbytes), l, retval);
FILE_UNUSE(fp, l);
return (error);
}
int
sys_extattr_get_file(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_get_file_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
syscallarg(void *) data;
syscallarg(size_t) nbytes;
} */ *uap = v;
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
SCARG(uap, data), SCARG(uap, nbytes), l, retval);
vrele(nd.ni_vp);
return (error);
}
int
sys_extattr_get_link(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_get_link_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
syscallarg(void *) data;
syscallarg(size_t) nbytes;
} */ *uap = v;
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
SCARG(uap, data), SCARG(uap, nbytes), l, retval);
vrele(nd.ni_vp);
return (error);
}
int
sys_extattr_delete_fd(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_delete_fd_args /* {
syscallarg(int) fd;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
} */ *uap = v;
struct file *fp;
struct vnode *vp;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp);
if (error)
return (error);
vp = (struct vnode *) fp->f_data;
error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, l);
FILE_UNUSE(fp, l);
return (error);
}
int
sys_extattr_delete_file(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_delete_file_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
} */ *uap = v;
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
l);
vrele(nd.ni_vp);
return (error);
}
int
sys_extattr_delete_link(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_delete_link_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(const char *) attrname;
} */ *uap = v;
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
l);
vrele(nd.ni_vp);
return (error);
}
int
sys_extattr_list_fd(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_list_fd_args /* {
syscallarg(int) fd;
syscallarg(int) attrnamespace;
syscallarg(void *) data;
syscallarg(size_t) nbytes;
} */ *uap = v;
struct file *fp;
struct vnode *vp;
int error;
error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp);
if (error)
return (error);
vp = (struct vnode *) fp->f_data;
error = extattr_list_vp(vp, SCARG(uap, attrnamespace),
SCARG(uap, data), SCARG(uap, nbytes), l, retval);
FILE_UNUSE(fp, l);
return (error);
}
int
sys_extattr_list_file(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_list_file_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(void *) data;
syscallarg(size_t) nbytes;
} */ *uap = v;
struct nameidata nd;
int error;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace),
SCARG(uap, data), SCARG(uap, nbytes), l, retval);
vrele(nd.ni_vp);
return (error);
}
int
sys_extattr_list_link(struct lwp *l, void *v, register_t *retval)
{
struct sys_extattr_list_link_args /* {
syscallarg(const char *) path;
syscallarg(int) attrnamespace;
syscallarg(void *) data;
syscallarg(size_t) nbytes;
} */ *uap = v;
struct nameidata nd;
int error;
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace),
SCARG(uap, data), SCARG(uap, nbytes), l, retval);
vrele(nd.ni_vp);
return (error);
}
/*****************************************************************************
* Linux-compatible <sys/xattr.h> API for file system extended attributes
*****************************************************************************/
int
sys_setxattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_setxattr_args /* {
syscallarg(const char *) path;
syscallarg(const char *) name;
syscallarg(void *) value;
syscallarg(size_t) size;
syscallarg(int) flags;
} */ *uap = v;
struct nameidata nd;
char attrname[XATTR_NAME_MAX];
int error;
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
/* XXX flags */
error = extattr_set_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER,
attrname, SCARG(uap, value), SCARG(uap, size), l, retval);
vrele(nd.ni_vp);
return (error);
}
int
sys_lsetxattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_lsetxattr_args /* {
syscallarg(const char *) path;
syscallarg(const char *) name;
syscallarg(void *) value;
syscallarg(size_t) size;
syscallarg(int) flags;
} */ *uap = v;
struct nameidata nd;
char attrname[XATTR_NAME_MAX];
int error;
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
/* XXX flags */
error = extattr_set_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER,
attrname, SCARG(uap, value), SCARG(uap, size), l, retval);
vrele(nd.ni_vp);
return (error);
}
int
sys_fsetxattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_fsetxattr_args /* {
syscallarg(int) fd;
syscallarg(const char *) name;
syscallarg(void *) value;
syscallarg(size_t) size;
syscallarg(int) flags;
} */ *uap = v;
struct file *fp;
struct vnode *vp;
char attrname[XATTR_NAME_MAX];
int error;
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp);
if (error)
return (error);
vp = (struct vnode *) fp->f_data;
/* XXX flags */
error = extattr_set_vp(vp, EXTATTR_NAMESPACE_USER,
attrname, SCARG(uap, value), SCARG(uap, size), l, retval);
FILE_UNUSE(fp, l);
return (error);
}
int
sys_getxattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_getxattr_args /* {
syscallarg(const char *) path;
syscallarg(const char *) name;
syscallarg(void *) value;
syscallarg(size_t) size;
} */ *uap = v;
struct nameidata nd;
char attrname[XATTR_NAME_MAX];
int error;
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_get_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER,
attrname, SCARG(uap, value), SCARG(uap, size), l, retval);
vrele(nd.ni_vp);
return (error);
}
int
sys_lgetxattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_lgetxattr_args /* {
syscallarg(const char *) path;
syscallarg(const char *) name;
syscallarg(void *) value;
syscallarg(size_t) size;
} */ *uap = v;
struct nameidata nd;
char attrname[XATTR_NAME_MAX];
int error;
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_get_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER,
attrname, SCARG(uap, value), SCARG(uap, size), l, retval);
vrele(nd.ni_vp);
return (error);
}
int
sys_fgetxattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_fgetxattr_args /* {
syscallarg(int) fd;
syscallarg(const char *) name;
syscallarg(void *) value;
syscallarg(size_t) size;
} */ *uap = v;
struct file *fp;
struct vnode *vp;
char attrname[XATTR_NAME_MAX];
int error;
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp);
if (error)
return (error);
vp = (struct vnode *) fp->f_data;
error = extattr_get_vp(vp, EXTATTR_NAMESPACE_USER,
attrname, SCARG(uap, value), SCARG(uap, size), l, retval);
FILE_UNUSE(fp, l);
return (error);
}
int
sys_listxattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_listxattr_args /* {
syscallarg(const char *) path;
syscallarg(char *) list;
syscallarg(size_t) size;
} */ *uap = v;
struct nameidata nd;
int error;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_list_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER,
SCARG(uap, list), SCARG(uap, size), l, retval);
vrele(nd.ni_vp);
return (error);
}
int
sys_llistxattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_llistxattr_args /* {
syscallarg(const char *) path;
syscallarg(char *) list;
syscallarg(size_t) size;
} */ *uap = v;
struct nameidata nd;
int error;
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_list_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER,
SCARG(uap, list), SCARG(uap, size), l, retval);
vrele(nd.ni_vp);
return (error);
}
int
sys_flistxattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_flistxattr_args /* {
syscallarg(int) fd;
syscallarg(char *) list;
syscallarg(size_t) size;
} */ *uap = v;
struct file *fp;
struct vnode *vp;
int error;
error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp);
if (error)
return (error);
vp = (struct vnode *) fp->f_data;
error = extattr_list_vp(vp, EXTATTR_NAMESPACE_USER,
SCARG(uap, list), SCARG(uap, size), l, retval);
FILE_UNUSE(fp, l);
return (error);
}
int
sys_removexattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_removexattr_args /* {
syscallarg(const char *) path;
syscallarg(const char *) name;
} */ *uap = v;
struct nameidata nd;
char attrname[XATTR_NAME_MAX];
int error;
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_delete_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER,
attrname, l);
vrele(nd.ni_vp);
return (error);
}
int
sys_lremovexattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_lremovexattr_args /* {
syscallarg(const char *) path;
syscallarg(const char *) name;
} */ *uap = v;
struct nameidata nd;
char attrname[XATTR_NAME_MAX];
int error;
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
error = namei(&nd);
if (error)
return (error);
error = extattr_delete_vp(nd.ni_vp, EXTATTR_NAMESPACE_USER,
attrname, l);
vrele(nd.ni_vp);
return (error);
}
int
sys_fremovexattr(struct lwp *l, void *v, register_t *retval)
{
struct sys_fremovexattr_args /* {
syscallarg(int) fd;
syscallarg(const char *) name;
} */ *uap = v;
struct file *fp;
struct vnode *vp;
char attrname[XATTR_NAME_MAX];
int error;
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
NULL);
if (error)
return (error);
error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp);
if (error)
return (error);
vp = (struct vnode *) fp->f_data;
error = extattr_delete_vp(vp, EXTATTR_NAMESPACE_USER,
attrname, l);
FILE_UNUSE(fp, l);
return (error);
}