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vfs_offline: add vfs_offline module

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This module marks all file in the share as offline.
It can be useful for shares mounted on top of a remote file
system (either through a samba VFS module or via FUSE).

Offline files change the behavior of Windows explorer, and
prevent it from peeking inside folders just for the sake of
drawing a nice icon of them. This greatly reduces the number
of requests Windows Explorer makes, and improves user experience
when dealing with remote file systems.

The offline bit also has an effect on the behavior of Windows
redirector.

Signed-off-by: Uri Simchoni <uri@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This commit is contained in:
Uri Simchoni 2015-11-04 08:44:29 +02:00 committed by Jeremy Allison
parent 89940f39c6
commit b37ecbd06d
3 changed files with 55 additions and 1 deletions
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47
source3/modules/vfs_offline.c Normal file
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@ -0,0 +1,47 @@
/*
Unix SMB/CIFS implementation.
Samba VFS module for marking all files as offline.
(c) Uri Simchoni, 2015
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"
static uint32_t offline_fs_capabilities(struct vfs_handle_struct *handle,
enum timestamp_set_resolution *p_ts_res)
{
return SMB_VFS_NEXT_FS_CAPABILITIES(handle, p_ts_res) |
FILE_SUPPORTS_REMOTE_STORAGE;
}
static bool offline_is_offline(struct vfs_handle_struct *handle,
const struct smb_filename *fname,
SMB_STRUCT_STAT *stbuf)
{
return true;
}
static struct vfs_fn_pointers offline_fns = {
.fs_capabilities_fn = offline_fs_capabilities,
.is_offline_fn = offline_is_offline,
};
NTSTATUS vfs_offline_init(void);
NTSTATUS vfs_offline_init(void)
{
return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "offline",
&offline_fns);
}

7
source3/modules/wscript_build
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@ -499,3 +499,10 @@ bld.SAMBA3_MODULE('vfs_vxfs',
init_function='',
internal_module=bld.SAMBA3_IS_STATIC_MODULE('vfs_vxfs'),
enabled=bld.SAMBA3_IS_ENABLED_MODULE('vfs_vxfs'))
bld.SAMBA3_MODULE('vfs_offline',
subsystem='vfs',
source='vfs_offline.c',
init_function='',
internal_module=bld.SAMBA3_IS_STATIC_MODULE('vfs_offline'),
enabled=bld.SAMBA3_IS_ENABLED_MODULE('vfs_offline'))

2
source3/wscript
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@ -1604,7 +1604,7 @@ main() {
vfs_smb_traffic_analyzer vfs_preopen vfs_catia
vfs_media_harmony vfs_unityed_media vfs_fruit vfs_shell_snap
vfs_commit vfs_worm vfs_crossrename vfs_linux_xfs_sgid
vfs_time_audit
vfs_time_audit vfs_offline
'''))
default_shared_modules.extend(TO_LIST('auth_script idmap_tdb2 idmap_script'))
# these have broken dependencies