Samba VFS module to map Windows share modes to AIX open(2) flags (work in progress)

vfs_sharemodes_aix.c

/*
 * Samba VFS module to map Windows share modes to AIX open(2) flags
 *
 * Copyright (C) SATOH Fumiyasu @ OSS Technology, Inc., Japan, 2011
 *
 * 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/>.
 */

/* WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING */
/* WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING */
/* WARNING * This VFS module is still work in progress. *  WARNING */
/* WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING */
/* WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING */

#include "includes.h"

#if SMB_VFS_INTERFACE_VERSION >= 28 /* Samba 3.6.0 and later */
#  include "smbd/smbd.h"
#  include "system/filesys.h"
#endif

static int vfs_sharemodes_aix_debug_level = DBGC_VFS;

#undef DBGC_CLASS
#define DBGC_CLASS vfs_sharemodes_aix_debug_level

static int smb_sharemodes_aix_open(vfs_handle_struct *handle,
			       struct smb_filename *smb_fname,
			       files_struct *fsp, int flags, mode_t mode)
{
	int result;

	if (fsp->share_access & FILE_SHARE_WRITE) {
		DEBUG(5, ("Map FILE_SHARE_WRITE to O_NSHARE\n"));
		flags |= O_NSHARE;
	} else if (fsp->share_access & FILE_SHARE_READ) {
		DEBUG(5, ("Map FILE_SHARE_WRITE to O_RSHARE\n"));
		flags |= O_RSHARE;
	}

	result = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);

	return result;
}

static struct vfs_fn_pointers vfs_sharemodes_aix_fns = {
#if SMB_VFS_INTERFACE_VERSION >= 28 /* Samba 3.6.0 and later */
	.open_fn = smb_sharemodes_aix_open,
#else
	.open = smb_sharemodes_aix_open,
#endif
};

NTSTATUS vfs_sharemodes_aix_init(void)
{
	NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
					"sharemodes_aix", &vfs_sharemodes_aix_fns);

	if (!NT_STATUS_IS_OK(ret))
		return ret;

	vfs_sharemodes_aix_debug_level = debug_add_class("sharemodes_aix");
	if (vfs_sharemodes_aix_debug_level == -1) {
		vfs_sharemodes_aix_debug_level = DBGC_VFS;
		DEBUG(0, ("vfs_sharemodes_aix: Couldn't register custom debugging "
			  "class!\n"));
	} else {
		DEBUG(10, ("vfs_sharemodes_aix: Debug class number of "
			   "'sharemodes_aix': %d\n", vfs_sharemodes_aix_debug_level));
	}

	return ret;
}