1105 lines
27 KiB
C
1105 lines
27 KiB
C
/* $NetBSD: vfs_xattr.c,v 1.6 2006/05/14 21:15:12 elad Exp $ */
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/*-
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* Copyright (c) 2005 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* VFS extended attribute support.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: vfs_xattr.c,v 1.6 2006/05/14 21:15:12 elad Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/filedesc.h>
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#include <sys/kernel.h>
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#include <sys/file.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include <sys/extattr.h>
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#include <sys/xattr.h>
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#include <sys/sysctl.h>
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#include <sys/sa.h>
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#include <sys/syscallargs.h>
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#include <sys/kauth.h>
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/*
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* Credential check based on process requesting service, and per-attribute
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* permissions.
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*
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* NOTE: Vnode must be locked.
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*/
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int
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extattr_check_cred(struct vnode *vp, int attrnamespace,
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kauth_cred_t cred, struct lwp *l, int access)
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{
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if (cred == NOCRED)
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return (0);
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switch (attrnamespace) {
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case EXTATTR_NAMESPACE_SYSTEM:
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/*
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* Do we really want to allow this, or just require that
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* these requests come from kernel code (NOCRED case above)?
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*/
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return (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER,
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&l->l_proc->p_acflag));
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case EXTATTR_NAMESPACE_USER:
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return (VOP_ACCESS(vp, access, cred, l));
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default:
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return (EPERM);
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}
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}
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/*
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* Default vfs_extattrctl routine for file systems that do not support
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* it.
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*/
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/*ARGSUSED*/
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int
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vfs_stdextattrctl(struct mount *mp, int cmt, struct vnode *vp,
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int attrnamespace, const char *attrname, struct lwp *l)
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{
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if (vp != NULL)
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VOP_UNLOCK(vp, 0);
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return (EOPNOTSUPP);
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}
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/*
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* Push extended attribute configuration information into the file
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* system.
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*
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* NOTE: Not all file systems that support extended attributes will
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* require the use of this system call.
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*/
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int
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sys_extattrctl(struct lwp *l, void *v, register_t *retval)
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{
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struct sys_extattrctl_args /* {
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syscallarg(const char *) path;
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syscallarg(int) cmd;
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syscallarg(const char *) filename;
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syscallarg(int) attrnamespace;
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syscallarg(const char *) attrname;
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} */ *uap = v;
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struct vnode *vp;
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struct nameidata nd;
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struct mount *mp;
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char attrname[EXTATTR_MAXNAMELEN];
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int error;
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if (SCARG(uap, attrname) != NULL) {
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error = copyinstr(SCARG(uap, attrname), attrname,
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sizeof(attrname), NULL);
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if (error)
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return (error);
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}
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vp = NULL;
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if (SCARG(uap, filename) != NULL) {
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NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
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SCARG(uap, filename), l);
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error = namei(&nd);
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if (error)
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return (error);
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vp = nd.ni_vp;
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}
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NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
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error = namei(&nd);
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if (error) {
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if (vp != NULL)
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vput(vp);
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return (error);
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}
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error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH);
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if (error) {
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if (vp != NULL)
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vput(vp);
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return (error);
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}
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error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), vp,
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SCARG(uap, attrnamespace),
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SCARG(uap, attrname) != NULL ? attrname : NULL, l);
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vn_finished_write(mp, 0);
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if (vp != NULL)
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vrele(vp);
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return (error);
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}
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/*****************************************************************************
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* Internal routines to manipulate file system extended attributes:
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* - set
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* - get
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* - delete
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* - list
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*****************************************************************************/
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/*
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* extattr_set_vp:
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*
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* Set a named extended attribute on a file or directory.
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*/
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static int
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extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname,
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const void *data, size_t nbytes, struct lwp *l, register_t *retval)
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{
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struct mount *mp;
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struct uio auio;
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struct iovec aiov;
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ssize_t cnt;
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int error;
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error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH);
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if (error)
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return (error);
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VOP_LEASE(vp, l, l->l_proc->p_cred, LEASE_WRITE);
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
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aiov.iov_base = __UNCONST(data); /* XXXUNCONST kills const */
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aiov.iov_len = nbytes;
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auio.uio_iov = &aiov;
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auio.uio_iovcnt = 1;
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auio.uio_offset = 0;
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if (nbytes > INT_MAX) {
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error = EINVAL;
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goto done;
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}
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auio.uio_resid = nbytes;
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auio.uio_rw = UIO_WRITE;
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KASSERT(l == curlwp);
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auio.uio_vmspace = l->l_proc->p_vmspace;
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cnt = nbytes;
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error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio,
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l->l_proc->p_cred, l);
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cnt -= auio.uio_resid;
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retval[0] = cnt;
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done:
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VOP_UNLOCK(vp, 0);
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vn_finished_write(mp, 0);
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return (error);
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}
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/*
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* extattr_get_vp:
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*
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* Get a named extended attribute on a file or directory.
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*/
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static int
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extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname,
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void *data, size_t nbytes, struct lwp *l, register_t *retval)
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{
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struct uio auio, *auiop;
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struct iovec aiov;
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ssize_t cnt;
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size_t size, *sizep;
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int error;
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VOP_LEASE(vp, l, l->l_proc->p_cred, LEASE_READ);
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
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/*
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* Slightly unusual semantics: if the user provides a NULL data
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* pointer, they don't want to receive the data, just the maximum
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* read length.
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*/
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auiop = NULL;
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sizep = NULL;
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cnt = 0;
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if (data != NULL) {
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aiov.iov_base = data;
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aiov.iov_len = nbytes;
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auio.uio_iov = &aiov;
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auio.uio_offset = 0;
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if (nbytes > INT_MAX) {
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error = EINVAL;
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goto done;
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}
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auio.uio_resid = nbytes;
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auio.uio_rw = UIO_READ;
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KASSERT(l == curlwp);
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auio.uio_vmspace = l->l_proc->p_vmspace;
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auiop = &auio;
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cnt = nbytes;
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} else
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sizep = &size;
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error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep,
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l->l_proc->p_cred, l);
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if (auiop != NULL) {
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cnt -= auio.uio_resid;
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retval[0] = cnt;
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} else
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retval[0] = size;
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done:
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VOP_UNLOCK(vp, 0);
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return (error);
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}
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/*
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* extattr_delete_vp:
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*
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* Delete a named extended attribute on a file or directory.
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*/
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static int
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extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname,
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struct lwp *l)
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{
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struct mount *mp;
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int error;
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error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH);
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if (error)
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return (error);
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VOP_LEASE(vp, l, l->l_proc->p_cred, LEASE_WRITE);
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
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error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, l->l_proc->p_cred, l);
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if (error == EOPNOTSUPP)
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error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL,
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l->l_proc->p_cred, l);
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VOP_UNLOCK(vp, 0);
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vn_finished_write(mp, 0);
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return (error);
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}
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/*
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* extattr_list_vp:
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*
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* Retrieve a list of extended attributes on a file or directory.
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*/
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static int
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extattr_list_vp(struct vnode *vp, int attrnamespace, void *data, size_t nbytes,
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struct lwp *l, register_t *retval)
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{
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struct uio auio, *auiop;
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size_t size, *sizep;
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struct iovec aiov;
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ssize_t cnt;
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int error;
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VOP_LEASE(vp, l, l->l_proc->p_cred, LEASE_READ);
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
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auiop = NULL;
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sizep = NULL;
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cnt = 0;
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if (data != NULL) {
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aiov.iov_base = data;
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aiov.iov_len = nbytes;
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auio.uio_iov = &aiov;
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auio.uio_offset = 0;
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if (nbytes > INT_MAX) {
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error = EINVAL;
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goto done;
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}
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auio.uio_resid = nbytes;
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auio.uio_rw = UIO_READ;
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KASSERT(l == curlwp);
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auio.uio_vmspace = l->l_proc->p_vmspace;
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auiop = &auio;
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cnt = nbytes;
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} else
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sizep = &size;
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error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep,
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l->l_proc->p_cred, l);
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if (auiop != NULL) {
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cnt -= auio.uio_resid;
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retval[0] = cnt;
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} else
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retval[0] = size;
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done:
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VOP_UNLOCK(vp, 0);
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return (error);
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}
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/*****************************************************************************
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* BSD <sys/extattr.h> API for file system extended attributes
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*****************************************************************************/
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int
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sys_extattr_set_fd(struct lwp *l, void *v, register_t *retval)
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{
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struct sys_extattr_set_fd_args /* {
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syscallarg(int) fd;
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syscallarg(int) attrnamespace;
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syscallarg(const char *) attrname;
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syscallarg(const void *) data;
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syscallarg(size_t) nbytes;
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} */ *uap = v;
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struct file *fp;
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struct vnode *vp;
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char attrname[EXTATTR_MAXNAMELEN];
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int error;
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error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
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NULL);
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if (error)
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return (error);
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error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp);
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if (error)
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return (error);
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vp = (struct vnode *) fp->f_data;
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|
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error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname,
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SCARG(uap, data), SCARG(uap, nbytes), l, retval);
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|
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FILE_UNUSE(fp, l);
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return (error);
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}
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|
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int
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sys_extattr_set_file(struct lwp *l, void *v, register_t *retval)
|
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{
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struct sys_extattr_set_file_args /* {
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syscallarg(const char *) path;
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syscallarg(int) attrnamespace;
|
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syscallarg(const char *) attrname;
|
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syscallarg(const void *) data;
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syscallarg(size_t) nbytes;
|
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} */ *uap = v;
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struct nameidata nd;
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char attrname[EXTATTR_MAXNAMELEN];
|
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int error;
|
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|
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error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
|
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NULL);
|
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if (error)
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return (error);
|
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|
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NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
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error = namei(&nd);
|
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if (error)
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return (error);
|
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|
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error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
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SCARG(uap, data), SCARG(uap, nbytes), l, retval);
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|
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vrele(nd.ni_vp);
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return (error);
|
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}
|
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|
|
int
|
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sys_extattr_set_link(struct lwp *l, void *v, register_t *retval)
|
|
{
|
|
struct sys_extattr_set_link_args /* {
|
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syscallarg(const char *) path;
|
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syscallarg(int) attrnamespace;
|
|
syscallarg(const char *) attrname;
|
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syscallarg(const void *) data;
|
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syscallarg(size_t) nbytes;
|
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} */ *uap = v;
|
|
struct nameidata nd;
|
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char attrname[EXTATTR_MAXNAMELEN];
|
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int error;
|
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|
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error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname),
|
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NULL);
|
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if (error)
|
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return (error);
|
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|
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NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), l);
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error = namei(&nd);
|
|
if (error)
|
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return (error);
|
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|
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error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,
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SCARG(uap, data), SCARG(uap, nbytes), l, retval);
|
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|
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vrele(nd.ni_vp);
|
|
return (error);
|
|
}
|
|
|
|
int
|
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sys_extattr_get_fd(struct lwp *l, void *v, register_t *retval)
|
|
{
|
|
struct sys_extattr_get_fd_args /* {
|
|
syscallarg(int) fd;
|
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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);
|
|
}
|