1243 lines
28 KiB
C
1243 lines
28 KiB
C
/* $NetBSD: vfs_xattr.c,v 1.31 2012/05/01 07:48:25 manu Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2005, 2008 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.
|
|
*
|
|
* 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 1.31 2012/05/01 07:48:25 manu 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>
|
|
#include <sys/ktrace.h>
|
|
|
|
#include <miscfs/genfs/genfs.h>
|
|
|
|
/*
|
|
* Credential check based on process requesting service, and per-attribute
|
|
* permissions.
|
|
*
|
|
* NOTE: Vnode must be locked.
|
|
*/
|
|
int
|
|
extattr_check_cred(struct vnode *vp, const char *attr, kauth_cred_t cred,
|
|
int access)
|
|
{
|
|
|
|
if (cred == NOCRED)
|
|
return (0);
|
|
|
|
return kauth_authorize_vnode(cred, kauth_extattr_action(access), vp,
|
|
NULL, genfs_can_extattr(cred, access, vp, attr));
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
|
|
if (vp != NULL)
|
|
VOP_UNLOCK(vp);
|
|
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, const struct sys_extattrctl_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) cmd;
|
|
syscallarg(const char *) filename;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
} */
|
|
struct vnode *path_vp, *file_vp;
|
|
struct pathbuf *file_pb;
|
|
struct nameidata file_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);
|
|
}
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_FOLLOW_NOEMULROOT, &path_vp);
|
|
if (error) {
|
|
return (error);
|
|
}
|
|
|
|
file_vp = NULL;
|
|
if (SCARG(uap, filename) != NULL) {
|
|
error = pathbuf_copyin(SCARG(uap, filename), &file_pb);
|
|
if (error) {
|
|
vrele(path_vp);
|
|
return (error);
|
|
}
|
|
NDINIT(&file_nd, LOOKUP, FOLLOW | LOCKLEAF, file_pb);
|
|
error = namei(&file_nd);
|
|
if (error) {
|
|
pathbuf_destroy(file_pb);
|
|
vrele(path_vp);
|
|
return (error);
|
|
}
|
|
file_vp = file_nd.ni_vp;
|
|
pathbuf_destroy(file_pb);
|
|
}
|
|
|
|
error = VFS_EXTATTRCTL(path_vp->v_mount, SCARG(uap, cmd), file_vp,
|
|
SCARG(uap, attrnamespace),
|
|
SCARG(uap, attrname) != NULL ? attrname : NULL);
|
|
|
|
if (file_vp != NULL)
|
|
vrele(file_vp);
|
|
vrele(path_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,
|
|
int flag)
|
|
{
|
|
struct uio auio;
|
|
struct iovec aiov;
|
|
ssize_t cnt;
|
|
int error;
|
|
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
|
|
if (flag) {
|
|
size_t attrlen;
|
|
|
|
error = VOP_GETEXTATTR(vp, attrnamespace, attrname, NULL,
|
|
&attrlen, l->l_cred);
|
|
|
|
switch (error) {
|
|
case ENODATA:
|
|
if (flag & XATTR_REPLACE)
|
|
goto done;
|
|
break;
|
|
case 0:
|
|
if (flag & XATTR_CREATE) {
|
|
error = EEXIST;
|
|
goto done;
|
|
}
|
|
break;
|
|
default:
|
|
goto done;
|
|
break;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
ktrkuser("xattr-name", (void *)__UNCONST(attrname), strlen(attrname));
|
|
ktrkuser("xattr-val", __UNCONST(data), nbytes);
|
|
|
|
error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio, l->l_cred);
|
|
cnt -= auio.uio_resid;
|
|
retval[0] = cnt;
|
|
|
|
done:
|
|
VOP_UNLOCK(vp);
|
|
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;
|
|
|
|
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;
|
|
|
|
ktrkuser("xattr-name", (void *)__UNCONST(attrname), strlen(attrname));
|
|
|
|
error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep,
|
|
l->l_cred);
|
|
|
|
if (auiop != NULL) {
|
|
cnt -= auio.uio_resid;
|
|
retval[0] = cnt;
|
|
|
|
ktrkuser("xattr-val", data, cnt);
|
|
} else
|
|
retval[0] = size;
|
|
|
|
done:
|
|
VOP_UNLOCK(vp);
|
|
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;
|
|
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
|
|
ktrkuser("xattr-name", (void *)__UNCONST(attrname), strlen(attrname));
|
|
|
|
error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, l->l_cred);
|
|
if (error == EOPNOTSUPP)
|
|
error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL,
|
|
l->l_cred);
|
|
|
|
VOP_UNLOCK(vp);
|
|
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,
|
|
int flag, struct lwp *l, register_t *retval)
|
|
{
|
|
struct uio auio, *auiop;
|
|
size_t size, *sizep;
|
|
struct iovec aiov;
|
|
ssize_t cnt;
|
|
int error;
|
|
|
|
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,
|
|
flag, l->l_cred);
|
|
|
|
if (auiop != NULL) {
|
|
cnt -= auio.uio_resid;
|
|
retval[0] = cnt;
|
|
|
|
ktrkuser("xattr-list", data, cnt);
|
|
} else
|
|
retval[0] = size;
|
|
|
|
done:
|
|
VOP_UNLOCK(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* BSD <sys/extattr.h> API for file system extended attributes
|
|
*****************************************************************************/
|
|
|
|
int
|
|
sys_extattr_set_fd(struct lwp *l, const struct sys_extattr_set_fd_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
syscallarg(const void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */
|
|
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 = fd_getvnode(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, 0);
|
|
|
|
fd_putfile(SCARG(uap, fd));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_set_file(struct lwp *l, const struct sys_extattr_set_file_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
syscallarg(const void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_FOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname,
|
|
SCARG(uap, data), SCARG(uap, nbytes), l, retval, 0);
|
|
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_set_link(struct lwp *l, const struct sys_extattr_set_link_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
syscallarg(const void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_NOFOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname,
|
|
SCARG(uap, data), SCARG(uap, nbytes), l, retval, 0);
|
|
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_get_fd(struct lwp *l, const struct sys_extattr_get_fd_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
syscallarg(void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */
|
|
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 = fd_getvnode(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);
|
|
|
|
fd_putfile(SCARG(uap, fd));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_get_file(struct lwp *l, const struct sys_extattr_get_file_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
syscallarg(void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_FOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname,
|
|
SCARG(uap, data), SCARG(uap, nbytes), l, retval);
|
|
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_get_link(struct lwp *l, const struct sys_extattr_get_link_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
syscallarg(void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_NOFOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname,
|
|
SCARG(uap, data), SCARG(uap, nbytes), l, retval);
|
|
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_delete_fd(struct lwp *l, const struct sys_extattr_delete_fd_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
} */
|
|
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 = fd_getvnode(SCARG(uap, fd), &fp);
|
|
if (error)
|
|
return (error);
|
|
vp = (struct vnode *) fp->f_data;
|
|
|
|
error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, l);
|
|
|
|
fd_putfile(SCARG(uap, fd));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_delete_file(struct lwp *l, const struct sys_extattr_delete_file_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_FOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, l);
|
|
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_delete_link(struct lwp *l, const struct sys_extattr_delete_link_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[EXTATTR_MAXNAMELEN];
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_NOFOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, l);
|
|
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_list_fd(struct lwp *l, const struct sys_extattr_list_fd_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
error = fd_getvnode(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),
|
|
EXTATTR_LIST_LENPREFIX, l, retval);
|
|
|
|
fd_putfile(SCARG(uap, fd));
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_list_file(struct lwp *l, const struct sys_extattr_list_file_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_FOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = extattr_list_vp(vp, SCARG(uap, attrnamespace),
|
|
SCARG(uap, data), SCARG(uap, nbytes),
|
|
EXTATTR_LIST_LENPREFIX, l, retval);
|
|
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_extattr_list_link(struct lwp *l, const struct sys_extattr_list_link_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(int) attrnamespace;
|
|
syscallarg(void *) data;
|
|
syscallarg(size_t) nbytes;
|
|
} */
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_NOFOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = extattr_list_vp(vp, SCARG(uap, attrnamespace),
|
|
SCARG(uap, data), SCARG(uap, nbytes),
|
|
EXTATTR_LIST_LENPREFIX, l, retval);
|
|
|
|
vrele(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Linux-compatible <sys/xattr.h> API for file system extended attributes
|
|
*****************************************************************************/
|
|
|
|
#define MATCH_NS(ns, key) (strncmp(ns, key, sizeof(ns) - 1) == 0)
|
|
static int
|
|
xattr_native(const char *key) {
|
|
if (MATCH_NS("system.", key))
|
|
return EXTATTR_NAMESPACE_SYSTEM;
|
|
else if (MATCH_NS("user.", key))
|
|
return EXTATTR_NAMESPACE_USER;
|
|
else if (MATCH_NS("security.", key))
|
|
return EXTATTR_NAMESPACE_SYSTEM;
|
|
else if (MATCH_NS("trusted.", key))
|
|
return EXTATTR_NAMESPACE_SYSTEM;
|
|
else
|
|
return EXTATTR_NAMESPACE_USER;
|
|
|
|
}
|
|
#undef MATCH_NS
|
|
|
|
#define XATTR_ERRNO(e) ((e) == EOPNOTSUPP ? ENOTSUP : (e))
|
|
|
|
int
|
|
sys_setxattr(struct lwp *l, const struct sys_setxattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(const char *) name;
|
|
syscallarg(void *) value;
|
|
syscallarg(size_t) size;
|
|
syscallarg(int) flags;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[XATTR_NAME_MAX];
|
|
int namespace;
|
|
register_t attrlen;
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
goto out;
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_FOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
goto out;
|
|
|
|
namespace = xattr_native(attrname);
|
|
|
|
error = extattr_set_vp(vp, namespace,
|
|
attrname, SCARG(uap, value), SCARG(uap, size), l,
|
|
&attrlen, SCARG(uap, flags));
|
|
|
|
vrele(vp);
|
|
out:
|
|
*retval = (error == 0) ? 0 : -1;
|
|
return (XATTR_ERRNO(error));
|
|
}
|
|
|
|
int
|
|
sys_lsetxattr(struct lwp *l, const struct sys_lsetxattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(const char *) name;
|
|
syscallarg(void *) value;
|
|
syscallarg(size_t) size;
|
|
syscallarg(int) flags;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[XATTR_NAME_MAX];
|
|
int namespace;
|
|
register_t attrlen;
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
goto out;
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_NOFOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
goto out;
|
|
|
|
namespace = xattr_native(attrname);
|
|
|
|
error = extattr_set_vp(vp, namespace,
|
|
attrname, SCARG(uap, value), SCARG(uap, size), l,
|
|
&attrlen, SCARG(uap, flags));
|
|
|
|
vrele(vp);
|
|
out:
|
|
*retval = (error == 0) ? 0 : -1;
|
|
return (XATTR_ERRNO(error));
|
|
}
|
|
|
|
int
|
|
sys_fsetxattr(struct lwp *l, const struct sys_fsetxattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fd;
|
|
syscallarg(const char *) name;
|
|
syscallarg(void *) value;
|
|
syscallarg(size_t) size;
|
|
syscallarg(int) flags;
|
|
} */
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
char attrname[XATTR_NAME_MAX];
|
|
int namespace;
|
|
register_t attrlen;
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
goto out;
|
|
|
|
error = fd_getvnode(SCARG(uap, fd), &fp);
|
|
if (error)
|
|
goto out;
|
|
vp = (struct vnode *) fp->f_data;
|
|
|
|
namespace = xattr_native(attrname);
|
|
|
|
error = extattr_set_vp(vp, namespace,
|
|
attrname, SCARG(uap, value), SCARG(uap, size), l,
|
|
&attrlen, SCARG(uap, flags));
|
|
|
|
fd_putfile(SCARG(uap, fd));
|
|
out:
|
|
*retval = (error == 0) ? 0 : -1;
|
|
return (XATTR_ERRNO(error));
|
|
}
|
|
|
|
int
|
|
sys_getxattr(struct lwp *l, const struct sys_getxattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(const char *) name;
|
|
syscallarg(void *) value;
|
|
syscallarg(size_t) size;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[XATTR_NAME_MAX];
|
|
int namespace;
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_FOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
namespace = xattr_native(attrname);
|
|
|
|
error = extattr_get_vp(vp, namespace,
|
|
attrname, SCARG(uap, value), SCARG(uap, size), l, retval);
|
|
|
|
vrele(vp);
|
|
return (XATTR_ERRNO(error));
|
|
}
|
|
|
|
int
|
|
sys_lgetxattr(struct lwp *l, const struct sys_lgetxattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(const char *) name;
|
|
syscallarg(void *) value;
|
|
syscallarg(size_t) size;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[XATTR_NAME_MAX];
|
|
int namespace;
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_NOFOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
namespace = xattr_native(attrname);
|
|
|
|
error = extattr_get_vp(vp, namespace,
|
|
attrname, SCARG(uap, value), SCARG(uap, size), l, retval);
|
|
|
|
vrele(vp);
|
|
return (XATTR_ERRNO(error));
|
|
}
|
|
|
|
int
|
|
sys_fgetxattr(struct lwp *l, const struct sys_fgetxattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fd;
|
|
syscallarg(const char *) name;
|
|
syscallarg(void *) value;
|
|
syscallarg(size_t) size;
|
|
} */
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
char attrname[XATTR_NAME_MAX];
|
|
int namespace;
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = fd_getvnode(SCARG(uap, fd), &fp);
|
|
if (error)
|
|
return (error);
|
|
vp = (struct vnode *) fp->f_data;
|
|
|
|
namespace = xattr_native(attrname);
|
|
|
|
error = extattr_get_vp(vp, namespace,
|
|
attrname, SCARG(uap, value), SCARG(uap, size), l, retval);
|
|
|
|
fd_putfile(SCARG(uap, fd));
|
|
return (XATTR_ERRNO(error));
|
|
}
|
|
|
|
int
|
|
sys_listxattr(struct lwp *l, const struct sys_listxattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(char *) list;
|
|
syscallarg(size_t) size;
|
|
} */
|
|
struct vnode *vp;
|
|
char *list;
|
|
size_t size;
|
|
register_t listsize_usr, listsize_sys;
|
|
int error;
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_FOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
list = SCARG(uap, list);
|
|
size = SCARG(uap, size);
|
|
|
|
error = extattr_list_vp(vp, EXTATTR_NAMESPACE_USER,
|
|
list, size, 0, l, &listsize_usr);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (list)
|
|
list += listsize_usr;
|
|
if (size)
|
|
size -= listsize_usr;
|
|
|
|
error = extattr_list_vp(vp, EXTATTR_NAMESPACE_SYSTEM,
|
|
list, size, 0, l, &listsize_sys);
|
|
switch (error) {
|
|
case EPERM:
|
|
error = 0; /* Ignore and just skip system EA */
|
|
listsize_sys = 0;
|
|
break;
|
|
case 0:
|
|
break;
|
|
default:
|
|
goto out;
|
|
break;
|
|
}
|
|
|
|
*retval = listsize_usr + listsize_sys;
|
|
|
|
out:
|
|
vrele(vp);
|
|
return (XATTR_ERRNO(error));
|
|
}
|
|
|
|
int
|
|
sys_llistxattr(struct lwp *l, const struct sys_llistxattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(char *) list;
|
|
syscallarg(size_t) size;
|
|
} */
|
|
struct vnode *vp;
|
|
char *list;
|
|
size_t size;
|
|
register_t listsize_usr, listsize_sys;
|
|
int error;
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_NOFOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
list = SCARG(uap, list);
|
|
size = SCARG(uap, size);
|
|
|
|
error = extattr_list_vp(vp, EXTATTR_NAMESPACE_USER,
|
|
list, size, 0, l, &listsize_usr);
|
|
if (error)
|
|
goto out;
|
|
if (list)
|
|
list += listsize_usr;
|
|
if (size)
|
|
size -= listsize_usr;
|
|
|
|
error = extattr_list_vp(vp, EXTATTR_NAMESPACE_SYSTEM,
|
|
list, size, 0, l, &listsize_sys);
|
|
switch (error) {
|
|
case EPERM:
|
|
error = 0; /* Ignore and just skip system EA */
|
|
listsize_sys = 0;
|
|
break;
|
|
case 0:
|
|
break;
|
|
default:
|
|
goto out;
|
|
break;
|
|
}
|
|
|
|
*retval = listsize_usr + listsize_sys;
|
|
out:
|
|
vrele(vp);
|
|
return (XATTR_ERRNO(error));
|
|
}
|
|
|
|
int
|
|
sys_flistxattr(struct lwp *l, const struct sys_flistxattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fd;
|
|
syscallarg(char *) list;
|
|
syscallarg(size_t) size;
|
|
} */
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
char *list;
|
|
size_t size;
|
|
register_t listsize_usr, listsize_sys;
|
|
int error;
|
|
|
|
error = fd_getvnode(SCARG(uap, fd), &fp);
|
|
if (error)
|
|
return (error);
|
|
vp = (struct vnode *) fp->f_data;
|
|
|
|
list = SCARG(uap, list);
|
|
size = SCARG(uap, size);
|
|
|
|
error = extattr_list_vp(vp, EXTATTR_NAMESPACE_USER,
|
|
list, size, 0, l, &listsize_usr);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (list)
|
|
list += listsize_usr;
|
|
if (size)
|
|
size -= listsize_usr;
|
|
|
|
error = extattr_list_vp(vp, EXTATTR_NAMESPACE_SYSTEM,
|
|
list, size, 0, l, &listsize_sys);
|
|
switch (error) {
|
|
case EPERM:
|
|
error = 0; /* Ignore and just skip system EA */
|
|
listsize_sys = 0;
|
|
break;
|
|
case 0:
|
|
break;
|
|
default:
|
|
goto out;
|
|
break;
|
|
}
|
|
|
|
*retval = listsize_usr + listsize_sys;
|
|
out:
|
|
|
|
fd_putfile(SCARG(uap, fd));
|
|
return (XATTR_ERRNO(error));
|
|
}
|
|
|
|
int
|
|
sys_removexattr(struct lwp *l, const struct sys_removexattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(const char *) name;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[XATTR_NAME_MAX];
|
|
int namespace;
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_FOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
namespace = xattr_native(attrname);
|
|
|
|
error = extattr_delete_vp(vp, namespace, attrname, l);
|
|
|
|
vrele(vp);
|
|
return (XATTR_ERRNO(error));
|
|
}
|
|
|
|
int
|
|
sys_lremovexattr(struct lwp *l, const struct sys_lremovexattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(const char *) name;
|
|
} */
|
|
struct vnode *vp;
|
|
char attrname[XATTR_NAME_MAX];
|
|
int namespace;
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = namei_simple_user(SCARG(uap, path),
|
|
NSM_NOFOLLOW_NOEMULROOT, &vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
namespace = xattr_native(attrname);
|
|
|
|
error = extattr_delete_vp(vp, namespace, attrname, l);
|
|
|
|
vrele(vp);
|
|
return (XATTR_ERRNO(error));
|
|
}
|
|
|
|
int
|
|
sys_fremovexattr(struct lwp *l, const struct sys_fremovexattr_args *uap, register_t *retval)
|
|
{
|
|
/* {
|
|
syscallarg(int) fd;
|
|
syscallarg(const char *) name;
|
|
} */
|
|
struct file *fp;
|
|
struct vnode *vp;
|
|
char attrname[XATTR_NAME_MAX];
|
|
int namespace;
|
|
int error;
|
|
|
|
error = copyinstr(SCARG(uap, name), attrname, sizeof(attrname),
|
|
NULL);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = fd_getvnode(SCARG(uap, fd), &fp);
|
|
if (error)
|
|
return (error);
|
|
vp = (struct vnode *) fp->f_data;
|
|
|
|
namespace = xattr_native(attrname);
|
|
|
|
error = extattr_delete_vp(vp, namespace, attrname, l);
|
|
|
|
fd_putfile(SCARG(uap, fd));
|
|
return (XATTR_ERRNO(error));
|
|
}
|