mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
fa2236c066
the acl_xattr code). Remove the "experimental" tag. Autobuild-User: Jeremy Allison <jra@samba.org> Autobuild-Date: Tue Sep 27 21:00:12 CEST 2011 on sn-devel-104
226 lines
5.9 KiB
C
226 lines
5.9 KiB
C
/*
|
|
* Store Windows ACLs in xattrs.
|
|
*
|
|
* Copyright (C) Volker Lendecke, 2008
|
|
* Copyright (C) Jeremy Allison, 2008
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
#include "smbd/smbd.h"
|
|
#include "librpc/gen_ndr/xattr.h"
|
|
#include "librpc/gen_ndr/ndr_xattr.h"
|
|
#include "../lib/crypto/crypto.h"
|
|
#include "auth.h"
|
|
|
|
#undef DBGC_CLASS
|
|
#define DBGC_CLASS DBGC_VFS
|
|
|
|
/* Pull in the common functions. */
|
|
#define ACL_MODULE_NAME "acl_xattr"
|
|
|
|
#include "modules/vfs_acl_common.c"
|
|
|
|
/*******************************************************************
|
|
Pull a security descriptor into a DATA_BLOB from a xattr.
|
|
*******************************************************************/
|
|
|
|
static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
|
|
vfs_handle_struct *handle,
|
|
files_struct *fsp,
|
|
const char *name,
|
|
DATA_BLOB *pblob)
|
|
{
|
|
size_t size = 1024;
|
|
uint8_t *val = NULL;
|
|
uint8_t *tmp;
|
|
ssize_t sizeret;
|
|
int saved_errno = 0;
|
|
|
|
ZERO_STRUCTP(pblob);
|
|
|
|
again:
|
|
|
|
tmp = talloc_realloc(ctx, val, uint8_t, size);
|
|
if (tmp == NULL) {
|
|
TALLOC_FREE(val);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
val = tmp;
|
|
|
|
become_root();
|
|
if (fsp && fsp->fh->fd != -1) {
|
|
sizeret = SMB_VFS_FGETXATTR(fsp, XATTR_NTACL_NAME, val, size);
|
|
} else {
|
|
sizeret = SMB_VFS_GETXATTR(handle->conn, name,
|
|
XATTR_NTACL_NAME, val, size);
|
|
}
|
|
if (sizeret == -1) {
|
|
saved_errno = errno;
|
|
}
|
|
unbecome_root();
|
|
|
|
/* Max ACL size is 65536 bytes. */
|
|
if (sizeret == -1) {
|
|
errno = saved_errno;
|
|
if ((errno == ERANGE) && (size != 65536)) {
|
|
/* Too small, try again. */
|
|
size = 65536;
|
|
goto again;
|
|
}
|
|
|
|
/* Real error - exit here. */
|
|
TALLOC_FREE(val);
|
|
return map_nt_error_from_unix(errno);
|
|
}
|
|
|
|
pblob->data = val;
|
|
pblob->length = sizeret;
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/*******************************************************************
|
|
Store a DATA_BLOB into an xattr given an fsp pointer.
|
|
*******************************************************************/
|
|
|
|
static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
|
|
files_struct *fsp,
|
|
DATA_BLOB *pblob)
|
|
{
|
|
int ret;
|
|
int saved_errno = 0;
|
|
|
|
DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
|
|
(unsigned int)pblob->length, fsp_str_dbg(fsp)));
|
|
|
|
become_root();
|
|
if (fsp->fh->fd != -1) {
|
|
ret = SMB_VFS_FSETXATTR(fsp, XATTR_NTACL_NAME,
|
|
pblob->data, pblob->length, 0);
|
|
} else {
|
|
ret = SMB_VFS_SETXATTR(fsp->conn, fsp->fsp_name->base_name,
|
|
XATTR_NTACL_NAME,
|
|
pblob->data, pblob->length, 0);
|
|
}
|
|
if (ret) {
|
|
saved_errno = errno;
|
|
}
|
|
unbecome_root();
|
|
if (ret) {
|
|
errno = saved_errno;
|
|
DEBUG(5, ("store_acl_blob_fsp: setting attr failed for file %s"
|
|
"with error %s\n",
|
|
fsp_str_dbg(fsp),
|
|
strerror(errno) ));
|
|
return map_nt_error_from_unix(errno);
|
|
}
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/*********************************************************************
|
|
Remove a Windows ACL - we're setting the underlying POSIX ACL.
|
|
*********************************************************************/
|
|
|
|
static int sys_acl_set_file_xattr(vfs_handle_struct *handle,
|
|
const char *name,
|
|
SMB_ACL_TYPE_T type,
|
|
SMB_ACL_T theacl)
|
|
{
|
|
int ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
|
|
name,
|
|
type,
|
|
theacl);
|
|
if (ret == -1) {
|
|
return -1;
|
|
}
|
|
|
|
become_root();
|
|
SMB_VFS_REMOVEXATTR(handle->conn, name, XATTR_NTACL_NAME);
|
|
unbecome_root();
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*********************************************************************
|
|
Remove a Windows ACL - we're setting the underlying POSIX ACL.
|
|
*********************************************************************/
|
|
|
|
static int sys_acl_set_fd_xattr(vfs_handle_struct *handle,
|
|
files_struct *fsp,
|
|
SMB_ACL_T theacl)
|
|
{
|
|
int ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
|
|
fsp,
|
|
theacl);
|
|
if (ret == -1) {
|
|
return -1;
|
|
}
|
|
|
|
become_root();
|
|
SMB_VFS_FREMOVEXATTR(fsp, XATTR_NTACL_NAME);
|
|
unbecome_root();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int connect_acl_xattr(struct vfs_handle_struct *handle,
|
|
const char *service,
|
|
const char *user)
|
|
{
|
|
int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
|
|
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
/* Ensure we have the parameters correct if we're
|
|
* using this module. */
|
|
DEBUG(2,("connect_acl_xattr: setting 'inherit acls = true' "
|
|
"'dos filemode = true' and "
|
|
"'force unknown acl user = true' for service %s\n",
|
|
service ));
|
|
|
|
lp_do_parameter(SNUM(handle->conn), "inherit acls", "true");
|
|
lp_do_parameter(SNUM(handle->conn), "dos filemode", "true");
|
|
lp_do_parameter(SNUM(handle->conn), "force unknown acl user", "true");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct vfs_fn_pointers vfs_acl_xattr_fns = {
|
|
.connect_fn = connect_acl_xattr,
|
|
.opendir = opendir_acl_common,
|
|
.mkdir = mkdir_acl_common,
|
|
.rmdir = rmdir_acl_common,
|
|
.open_fn = open_acl_common,
|
|
.create_file = create_file_acl_common,
|
|
.unlink = unlink_acl_common,
|
|
.chmod = chmod_acl_module_common,
|
|
.fchmod = fchmod_acl_module_common,
|
|
.fget_nt_acl = fget_nt_acl_common,
|
|
.get_nt_acl = get_nt_acl_common,
|
|
.fset_nt_acl = fset_nt_acl_common,
|
|
.chmod_acl = chmod_acl_acl_module_common,
|
|
.fchmod_acl = fchmod_acl_acl_module_common,
|
|
.sys_acl_set_file = sys_acl_set_file_xattr,
|
|
.sys_acl_set_fd = sys_acl_set_fd_xattr
|
|
};
|
|
|
|
NTSTATUS vfs_acl_xattr_init(void)
|
|
{
|
|
return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_xattr",
|
|
&vfs_acl_xattr_fns);
|
|
}
|