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/*
* implementation of an Shadow Copy module
*
* Copyright (C) Stefan Metzmacher 2003-2004
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/*
Please read the VFS module Samba-HowTo-Collection.
there's a chapter about this module
For this share
Z:\
the ShadowCopies are in this directories
Z:\@GMT-2003.08.05-12.00.00\
Z:\@GMT-2003.08.05-12.01.00\
Z:\@GMT-2003.08.05-12.02.00\
e.g.
Z:\testfile.txt
Z:\@GMT-2003.08.05-12.02.00\testfile.txt
or:
Z:\testdir\testfile.txt
Z:\@GMT-2003.08.05-12.02.00\testdir\testfile.txt
Note: Files must differ to be displayed via Windows Explorer!
Directories are always displayed...
*/
static int vfs_shadow_copy_debug_level = DBGC_VFS;
#undef DBGC_CLASS
#define DBGC_CLASS vfs_shadow_copy_debug_level
#define SHADOW_COPY_PREFIX "@GMT-"
#define SHADOW_COPY_SAMPLE "@GMT-2004.02.18-15.44.00"
typedef struct {
int pos;
int num;
SMB_STRUCT_DIRENT *dirs;
} shadow_copy_Dir;
static BOOL shadow_copy_match_name(const char *name)
{
if (strncmp(SHADOW_COPY_PREFIX,name, sizeof(SHADOW_COPY_PREFIX)-1)==0 &&
(strlen(SHADOW_COPY_SAMPLE) == strlen(name))) {
return True;
}
return False;
}
static DIR *shadow_copy_opendir(vfs_handle_struct *handle, connection_struct *conn, const char *fname)
{
shadow_copy_Dir *dirp;
DIR *p = SMB_VFS_NEXT_OPENDIR(handle,conn,fname);
if (!p) {
DEBUG(0,("shadow_copy_opendir: SMB_VFS_NEXT_OPENDIR() failed for [%s]\n",fname));
return NULL;
}
dirp = SMB_MALLOC_P(shadow_copy_Dir);
if (!dirp) {
DEBUG(0,("shadow_copy_opendir: Out of memory\n"));
SMB_VFS_NEXT_CLOSEDIR(handle,conn,p);
return NULL;
}
ZERO_STRUCTP(dirp);
while (True) {
SMB_STRUCT_DIRENT *d;
SMB_STRUCT_DIRENT *r;
d = SMB_VFS_NEXT_READDIR(handle, conn, p);
if (d == NULL) {
break;
}
if (shadow_copy_match_name(d->d_name)) {
DEBUG(8,("shadow_copy_opendir: hide [%s]\n",d->d_name));
continue;
}
DEBUG(10,("shadow_copy_opendir: not hide [%s]\n",d->d_name));
r = SMB_REALLOC_ARRAY(dirp->dirs,SMB_STRUCT_DIRENT, dirp->num+1);
if (!r) {
DEBUG(0,("shadow_copy_opendir: Out of memory\n"));
break;
}
dirp->dirs = r;
dirp->dirs[dirp->num++] = *d;
}
SMB_VFS_NEXT_CLOSEDIR(handle,conn,p);
return((DIR *)dirp);
}
SMB_STRUCT_DIRENT *shadow_copy_readdir(vfs_handle_struct *handle, connection_struct *conn, DIR *_dirp)
{
shadow_copy_Dir *dirp = (shadow_copy_Dir *)_dirp;
if (dirp->pos < dirp->num) {
return &(dirp->dirs[dirp->pos++]);
}
return NULL;
}
int shadow_copy_closedir(vfs_handle_struct *handle, connection_struct *conn, DIR *_dirp)
{
shadow_copy_Dir *dirp = (shadow_copy_Dir *)_dirp;
SAFE_FREE(dirp);
return 0;
}
static int shadow_copy_get_shadow_copy_data(vfs_handle_struct *handle, files_struct *fsp, SHADOW_COPY_DATA *shadow_copy_data, BOOL labels)
{
DIR *p = SMB_VFS_NEXT_OPENDIR(handle,fsp->conn,fsp->conn->connectpath);
shadow_copy_data->num_volumes = 0;
shadow_copy_data->labels = NULL;
if (!p) {
DEBUG(0,("shadow_copy_get_shadow_copy_data: SMB_VFS_NEXT_OPENDIR() failed for [%s]\n",fsp->conn->connectpath));
return -1;
}
while (True) {
SHADOW_COPY_LABEL *tlabels;
SMB_STRUCT_DIRENT *d;
d = SMB_VFS_NEXT_READDIR(handle, fsp->conn, p);
if (d == NULL) {
break;
}
/* */
if (!shadow_copy_match_name(d->d_name)) {
DEBUG(10,("shadow_copy_get_shadow_copy_data: ignore [%s]\n",d->d_name));
continue;
}
DEBUG(7,("shadow_copy_get_shadow_copy_data: not ignore [%s]\n",d->d_name));
if (!labels) {
shadow_copy_data->num_volumes++;
continue;
}
tlabels = (SHADOW_COPY_LABEL *)TALLOC_REALLOC(shadow_copy_data->mem_ctx,
shadow_copy_data->labels,
(shadow_copy_data->num_volumes+1)*sizeof(SHADOW_COPY_LABEL));
if (tlabels == NULL) {
DEBUG(0,("shadow_copy_get_shadow_copy_data: Out of memory\n"));
SMB_VFS_NEXT_CLOSEDIR(handle,fsp->conn,p);
return -1;
}
snprintf(tlabels[shadow_copy_data->num_volumes++], sizeof(*tlabels), "%s",d->d_name);
shadow_copy_data->labels = tlabels;
}
SMB_VFS_NEXT_CLOSEDIR(handle,fsp->conn,p);
return 0;
}
/* VFS operations structure */
static vfs_op_tuple shadow_copy_ops[] = {
{SMB_VFS_OP(shadow_copy_opendir), SMB_VFS_OP_OPENDIR, SMB_VFS_LAYER_TRANSPARENT},
{SMB_VFS_OP(shadow_copy_readdir), SMB_VFS_OP_READDIR, SMB_VFS_LAYER_TRANSPARENT},
{SMB_VFS_OP(shadow_copy_closedir), SMB_VFS_OP_CLOSEDIR, SMB_VFS_LAYER_TRANSPARENT},
{SMB_VFS_OP(shadow_copy_get_shadow_copy_data), SMB_VFS_OP_GET_SHADOW_COPY_DATA,SMB_VFS_LAYER_OPAQUE},
{SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
};
NTSTATUS vfs_shadow_copy_init(void)
{
NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "shadow_copy", shadow_copy_ops);
if (!NT_STATUS_IS_OK(ret))
return ret;
vfs_shadow_copy_debug_level = debug_add_class("shadow_copy");
if (vfs_shadow_copy_debug_level == -1) {
vfs_shadow_copy_debug_level = DBGC_VFS;
DEBUG(0, ("%s: Couldn't register custom debugging class!\n",
"vfs_shadow_copy_init"));
} else {
DEBUG(10, ("%s: Debug class number of '%s': %d\n",
"vfs_shadow_copy_init","shadow_copy",vfs_shadow_copy_debug_level));
}
return ret;
}
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