/* * 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 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" /* 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 SMB_STRUCT_DIR *shadow_copy_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr) { shadow_copy_Dir *dirp; SMB_STRUCT_DIR *p = SMB_VFS_NEXT_OPENDIR(handle,fname,mask,attr); 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,p); return NULL; } ZERO_STRUCTP(dirp); while (True) { SMB_STRUCT_DIRENT *d; d = SMB_VFS_NEXT_READDIR(handle, 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)); dirp->dirs = SMB_REALLOC_ARRAY(dirp->dirs,SMB_STRUCT_DIRENT, dirp->num+1); if (!dirp->dirs) { DEBUG(0,("shadow_copy_opendir: Out of memory\n")); break; } dirp->dirs[dirp->num++] = *d; } SMB_VFS_NEXT_CLOSEDIR(handle,p); return((SMB_STRUCT_DIR *)dirp); } static SMB_STRUCT_DIRENT *shadow_copy_readdir(vfs_handle_struct *handle, SMB_STRUCT_DIR *_dirp) { shadow_copy_Dir *dirp = (shadow_copy_Dir *)_dirp; if (dirp->pos < dirp->num) { return &(dirp->dirs[dirp->pos++]); } return NULL; } static void shadow_copy_seekdir(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *_dirp, long offset) { shadow_copy_Dir *dirp = (shadow_copy_Dir *)_dirp; if (offset < dirp->num) { dirp->pos = offset ; } } static long shadow_copy_telldir(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *_dirp) { shadow_copy_Dir *dirp = (shadow_copy_Dir *)_dirp; return( dirp->pos ) ; } static void shadow_copy_rewinddir(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *_dirp) { shadow_copy_Dir *dirp = (shadow_copy_Dir *)_dirp; dirp->pos = 0 ; } static int shadow_copy_closedir(vfs_handle_struct *handle, SMB_STRUCT_DIR *_dirp) { shadow_copy_Dir *dirp = (shadow_copy_Dir *)_dirp; SAFE_FREE(dirp->dirs); 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) { SMB_STRUCT_DIR *p = SMB_VFS_NEXT_OPENDIR(handle,fsp->conn->connectpath,NULL,0); 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, 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,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,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_seekdir), SMB_VFS_OP_SEEKDIR, SMB_VFS_LAYER_TRANSPARENT}, {SMB_VFS_OP(shadow_copy_telldir), SMB_VFS_OP_TELLDIR, SMB_VFS_LAYER_TRANSPARENT}, {SMB_VFS_OP(shadow_copy_rewinddir), SMB_VFS_OP_REWINDDIR, 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 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; }