/* * Recycle bin VFS module for Samba. * * Copyright (C) 2001, Brandon Stone, Amherst College, <bbstone@amherst.edu>. * Copyright (C) 2002, Jeremy Allison - modified to make a VFS module. * Copyright (C) 2002, Alexander Bokovoy - cascaded VFS adoption, * Copyright (C) 2002, Juergen Hasch - added some options. * Copyright (C) 2002, Simo Sorce * Copyright (C) 2002, Stefan (metze) Metzmacher * * 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 "system/filesys.h" #include "../librpc/gen_ndr/ndr_netlogon.h" #include "auth.h" #define ALLOC_CHECK(ptr, label) do { if ((ptr) == NULL) { DEBUG(0, ("recycle.bin: out of memory!\n")); errno = ENOMEM; goto label; } } while(0) static int vfs_recycle_debug_level = DBGC_VFS; #undef DBGC_CLASS #define DBGC_CLASS vfs_recycle_debug_level static int recycle_connect(vfs_handle_struct *handle, const char *service, const char *user); static void recycle_disconnect(vfs_handle_struct *handle); static int recycle_unlink(vfs_handle_struct *handle, const struct smb_filename *smb_fname); static int recycle_connect(vfs_handle_struct *handle, const char *service, const char *user) { int ret = SMB_VFS_NEXT_CONNECT(handle, service, user); if (ret < 0) { return ret; } DEBUG(10,("recycle_connect() connect to service[%s] as user[%s].\n", service,user)); return 0; } static void recycle_disconnect(vfs_handle_struct *handle) { DEBUG(10,("recycle_disconnect() connect to service[%s].\n", lp_servicename(SNUM(handle->conn)))); SMB_VFS_NEXT_DISCONNECT(handle); } static const char *recycle_repository(vfs_handle_struct *handle) { const char *tmp_str = NULL; tmp_str = lp_parm_const_string(SNUM(handle->conn), "recycle", "repository",".recycle"); DEBUG(10, ("recycle: repository = %s\n", tmp_str)); return tmp_str; } static bool recycle_keep_dir_tree(vfs_handle_struct *handle) { bool ret; ret = lp_parm_bool(SNUM(handle->conn), "recycle", "keeptree", False); DEBUG(10, ("recycle_bin: keeptree = %s\n", ret?"True":"False")); return ret; } static bool recycle_versions(vfs_handle_struct *handle) { bool ret; ret = lp_parm_bool(SNUM(handle->conn), "recycle", "versions", False); DEBUG(10, ("recycle: versions = %s\n", ret?"True":"False")); return ret; } static bool recycle_touch(vfs_handle_struct *handle) { bool ret; ret = lp_parm_bool(SNUM(handle->conn), "recycle", "touch", False); DEBUG(10, ("recycle: touch = %s\n", ret?"True":"False")); return ret; } static bool recycle_touch_mtime(vfs_handle_struct *handle) { bool ret; ret = lp_parm_bool(SNUM(handle->conn), "recycle", "touch_mtime", False); DEBUG(10, ("recycle: touch_mtime = %s\n", ret?"True":"False")); return ret; } static const char **recycle_exclude(vfs_handle_struct *handle) { const char **tmp_lp; tmp_lp = lp_parm_string_list(SNUM(handle->conn), "recycle", "exclude", NULL); DEBUG(10, ("recycle: exclude = %s ...\n", tmp_lp?*tmp_lp:"")); return tmp_lp; } static const char **recycle_exclude_dir(vfs_handle_struct *handle) { const char **tmp_lp; tmp_lp = lp_parm_string_list(SNUM(handle->conn), "recycle", "exclude_dir", NULL); DEBUG(10, ("recycle: exclude_dir = %s ...\n", tmp_lp?*tmp_lp:"")); return tmp_lp; } static const char **recycle_noversions(vfs_handle_struct *handle) { const char **tmp_lp; tmp_lp = lp_parm_string_list(SNUM(handle->conn), "recycle", "noversions", NULL); DEBUG(10, ("recycle: noversions = %s\n", tmp_lp?*tmp_lp:"")); return tmp_lp; } static SMB_OFF_T recycle_maxsize(vfs_handle_struct *handle) { SMB_OFF_T maxsize; maxsize = conv_str_size(lp_parm_const_string(SNUM(handle->conn), "recycle", "maxsize", NULL)); DEBUG(10, ("recycle: maxsize = %lu\n", (long unsigned int)maxsize)); return maxsize; } static SMB_OFF_T recycle_minsize(vfs_handle_struct *handle) { SMB_OFF_T minsize; minsize = conv_str_size(lp_parm_const_string(SNUM(handle->conn), "recycle", "minsize", NULL)); DEBUG(10, ("recycle: minsize = %lu\n", (long unsigned int)minsize)); return minsize; } static mode_t recycle_directory_mode(vfs_handle_struct *handle) { int dirmode; const char *buff; buff = lp_parm_const_string(SNUM(handle->conn), "recycle", "directory_mode", NULL); if (buff != NULL ) { sscanf(buff, "%o", &dirmode); } else { dirmode=S_IRUSR | S_IWUSR | S_IXUSR; } DEBUG(10, ("recycle: directory_mode = %o\n", dirmode)); return (mode_t)dirmode; } static mode_t recycle_subdir_mode(vfs_handle_struct *handle) { int dirmode; const char *buff; buff = lp_parm_const_string(SNUM(handle->conn), "recycle", "subdir_mode", NULL); if (buff != NULL ) { sscanf(buff, "%o", &dirmode); } else { dirmode=recycle_directory_mode(handle); } DEBUG(10, ("recycle: subdir_mode = %o\n", dirmode)); return (mode_t)dirmode; } static bool recycle_directory_exist(vfs_handle_struct *handle, const char *dname) { SMB_STRUCT_STAT st; if (vfs_stat_smb_fname(handle->conn, dname, &st) == 0) { if (S_ISDIR(st.st_ex_mode)) { return True; } } return False; } static bool recycle_file_exist(vfs_handle_struct *handle, const struct smb_filename *smb_fname) { struct smb_filename *smb_fname_tmp = NULL; NTSTATUS status; bool ret = false; status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp); if (!NT_STATUS_IS_OK(status)) { return false; } if (SMB_VFS_STAT(handle->conn, smb_fname_tmp) == 0) { if (S_ISREG(smb_fname_tmp->st.st_ex_mode)) { ret = true; } } TALLOC_FREE(smb_fname_tmp); return ret; } /** * Return file size * @param conn connection * @param fname file name * @return size in bytes **/ static SMB_OFF_T recycle_get_file_size(vfs_handle_struct *handle, const struct smb_filename *smb_fname) { struct smb_filename *smb_fname_tmp = NULL; NTSTATUS status; SMB_OFF_T size; status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp); if (!NT_STATUS_IS_OK(status)) { size = (SMB_OFF_T)0; goto out; } if (SMB_VFS_STAT(handle->conn, smb_fname_tmp) != 0) { DEBUG(0,("recycle: stat for %s returned %s\n", smb_fname_str_dbg(smb_fname_tmp), strerror(errno))); size = (SMB_OFF_T)0; goto out; } size = smb_fname_tmp->st.st_ex_size; out: TALLOC_FREE(smb_fname_tmp); return size; } /** * Create directory tree * @param conn connection * @param dname Directory tree to be created * @return Returns True for success **/ static bool recycle_create_dir(vfs_handle_struct *handle, const char *dname) { size_t len; mode_t mode; char *new_dir = NULL; char *tmp_str = NULL; char *token; char *tok_str; bool ret = False; char *saveptr; mode = recycle_directory_mode(handle); tmp_str = SMB_STRDUP(dname); ALLOC_CHECK(tmp_str, done); tok_str = tmp_str; len = strlen(dname)+1; new_dir = (char *)SMB_MALLOC(len + 1); ALLOC_CHECK(new_dir, done); *new_dir = '\0'; if (dname[0] == '/') { /* Absolute path. */ strlcat(new_dir,"/",len+1); } /* Create directory tree if neccessary */ for(token = strtok_r(tok_str, "/", &saveptr); token; token = strtok_r(NULL, "/", &saveptr)) { strlcat(new_dir, token, len+1); if (recycle_directory_exist(handle, new_dir)) DEBUG(10, ("recycle: dir %s already exists\n", new_dir)); else { DEBUG(5, ("recycle: creating new dir %s\n", new_dir)); if (SMB_VFS_NEXT_MKDIR(handle, new_dir, mode) != 0) { DEBUG(1,("recycle: mkdir failed for %s with error: %s\n", new_dir, strerror(errno))); ret = False; goto done; } } strlcat(new_dir, "/", len+1); mode = recycle_subdir_mode(handle); } ret = True; done: SAFE_FREE(tmp_str); SAFE_FREE(new_dir); return ret; } /** * Check if any of the components of "exclude_list" are contained in path. * Return True if found **/ static bool matchdirparam(const char **dir_exclude_list, char *path) { char *startp = NULL, *endp = NULL; if (dir_exclude_list == NULL || dir_exclude_list[0] == NULL || *dir_exclude_list[0] == '\0' || path == NULL || *path == '\0') { return False; } /* * Walk the components of path, looking for matches with the * exclude list on each component. */ for (startp = path; startp; startp = endp) { int i; while (*startp == '/') { startp++; } endp = strchr(startp, '/'); if (endp) { *endp = '\0'; } for(i=0; dir_exclude_list[i] ; i++) { if(unix_wild_match(dir_exclude_list[i], startp)) { /* Repair path. */ if (endp) { *endp = '/'; } return True; } } /* Repair path. */ if (endp) { *endp = '/'; } } return False; } /** * Check if needle is contained in haystack, * and ? patterns are resolved * @param haystack list of parameters separated by delimimiter character * @param needle string to be matched exectly to haystack including pattern matching * @return True if found **/ static bool matchparam(const char **haystack_list, const char *needle) { int i; if (haystack_list == NULL || haystack_list[0] == NULL || *haystack_list[0] == '\0' || needle == NULL || *needle == '\0') { return False; } for(i=0; haystack_list[i] ; i++) { if(unix_wild_match(haystack_list[i], needle)) { return True; } } return False; } /** * Touch access or modify date **/ static void recycle_do_touch(vfs_handle_struct *handle, const struct smb_filename *smb_fname, bool touch_mtime) { struct smb_filename *smb_fname_tmp = NULL; struct smb_file_time ft; NTSTATUS status; int ret, err; ZERO_STRUCT(ft); status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp); if (!NT_STATUS_IS_OK(status)) { return; } if (SMB_VFS_STAT(handle->conn, smb_fname_tmp) != 0) { DEBUG(0,("recycle: stat for %s returned %s\n", smb_fname_str_dbg(smb_fname_tmp), strerror(errno))); goto out; } /* atime */ ft.atime = timespec_current(); /* mtime */ ft.mtime = touch_mtime ? ft.atime : smb_fname_tmp->st.st_ex_mtime; become_root(); ret = SMB_VFS_NEXT_NTIMES(handle, smb_fname_tmp, &ft); err = errno; unbecome_root(); if (ret == -1 ) { DEBUG(0, ("recycle: touching %s failed, reason = %s\n", smb_fname_str_dbg(smb_fname_tmp), strerror(err))); } out: TALLOC_FREE(smb_fname_tmp); } /** * Check if file should be recycled **/ static int recycle_unlink(vfs_handle_struct *handle, const struct smb_filename *smb_fname) { connection_struct *conn = handle->conn; char *path_name = NULL; char *temp_name = NULL; char *final_name = NULL; struct smb_filename *smb_fname_final = NULL; const char *base; char *repository = NULL; int i = 1; SMB_OFF_T maxsize, minsize; SMB_OFF_T file_size; /* space_avail; */ bool exist; NTSTATUS status; int rc = -1; repository = talloc_sub_advanced(NULL, lp_servicename(SNUM(conn)), conn->session_info->unix_name, conn->connectpath, conn->session_info->utok.gid, conn->session_info->sanitized_username, conn->session_info->info3->base.domain.string, recycle_repository(handle)); ALLOC_CHECK(repository, done); /* shouldn't we allow absolute path names here? --metze */ /* Yes :-). JRA. */ trim_char(repository, '\0', '/'); if(!repository || *(repository) == '\0') { DEBUG(3, ("recycle: repository path not set, purging %s...\n", smb_fname_str_dbg(smb_fname))); rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname); goto done; } /* we don't recycle the recycle bin... */ if (strncmp(smb_fname->base_name, repository, strlen(repository)) == 0) { DEBUG(3, ("recycle: File is within recycling bin, unlinking ...\n")); rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname); goto done; } file_size = recycle_get_file_size(handle, smb_fname); /* it is wrong to purge filenames only because they are empty imho * --- simo * if(fsize == 0) { DEBUG(3, ("recycle: File %s is empty, purging...\n", file_name)); rc = SMB_VFS_NEXT_UNLINK(handle,file_name); goto done; } */ /* FIXME: this is wrong, we should check the whole size of the recycle bin is * not greater then maxsize, not the size of the single file, also it is better * to remove older files */ maxsize = recycle_maxsize(handle); if(maxsize > 0 && file_size > maxsize) { DEBUG(3, ("recycle: File %s exceeds maximum recycle size, " "purging... \n", smb_fname_str_dbg(smb_fname))); rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname); goto done; } minsize = recycle_minsize(handle); if(minsize > 0 && file_size < minsize) { DEBUG(3, ("recycle: File %s lowers minimum recycle size, " "purging... \n", smb_fname_str_dbg(smb_fname))); rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname); goto done; } /* FIXME: this is wrong: moving files with rename does not change the disk space * allocation * space_avail = SMB_VFS_NEXT_DISK_FREE(handle, ".", True, &bsize, &dfree, &dsize) * 1024L; DEBUG(5, ("space_avail = %Lu, file_size = %Lu\n", space_avail, file_size)); if(space_avail < file_size) { DEBUG(3, ("recycle: Not enough diskspace, purging file %s\n", file_name)); rc = SMB_VFS_NEXT_UNLINK(handle, file_name); goto done; } */ /* extract filename and path */ base = strrchr(smb_fname->base_name, '/'); if (base == NULL) { base = smb_fname->base_name; path_name = SMB_STRDUP("/"); ALLOC_CHECK(path_name, done); } else { path_name = SMB_STRDUP(smb_fname->base_name); ALLOC_CHECK(path_name, done); path_name[base - smb_fname->base_name] = '\0'; base++; } /* original filename with path */ DEBUG(10, ("recycle: fname = %s\n", smb_fname_str_dbg(smb_fname))); /* original path */ DEBUG(10, ("recycle: fpath = %s\n", path_name)); /* filename without path */ DEBUG(10, ("recycle: base = %s\n", base)); if (matchparam(recycle_exclude(handle), base)) { DEBUG(3, ("recycle: file %s is excluded \n", base)); rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname); goto done; } if (matchdirparam(recycle_exclude_dir(handle), path_name)) { DEBUG(3, ("recycle: directory %s is excluded \n", path_name)); rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname); goto done; } if (recycle_keep_dir_tree(handle) == True) { if (asprintf(&temp_name, "%s/%s", repository, path_name) == -1) { ALLOC_CHECK(temp_name, done); } } else { temp_name = SMB_STRDUP(repository); } ALLOC_CHECK(temp_name, done); exist = recycle_directory_exist(handle, temp_name); if (exist) { DEBUG(10, ("recycle: Directory already exists\n")); } else { DEBUG(10, ("recycle: Creating directory %s\n", temp_name)); if (recycle_create_dir(handle, temp_name) == False) { DEBUG(3, ("recycle: Could not create directory, " "purging %s...\n", smb_fname_str_dbg(smb_fname))); rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname); goto done; } } if (asprintf(&final_name, "%s/%s", temp_name, base) == -1) { ALLOC_CHECK(final_name, done); } /* Create smb_fname with final base name and orig stream name. */ status = create_synthetic_smb_fname(talloc_tos(), final_name, smb_fname->stream_name, NULL, &smb_fname_final); if (!NT_STATUS_IS_OK(status)) { rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname); goto done; } /* new filename with path */ DEBUG(10, ("recycle: recycled file name: %s\n", smb_fname_str_dbg(smb_fname_final))); /* check if we should delete file from recycle bin */ if (recycle_file_exist(handle, smb_fname_final)) { if (recycle_versions(handle) == False || matchparam(recycle_noversions(handle), base) == True) { DEBUG(3, ("recycle: Removing old file %s from recycle " "bin\n", smb_fname_str_dbg(smb_fname_final))); if (SMB_VFS_NEXT_UNLINK(handle, smb_fname_final) != 0) { DEBUG(1, ("recycle: Error deleting old file: %s\n", strerror(errno))); } } } /* rename file we move to recycle bin */ i = 1; while (recycle_file_exist(handle, smb_fname_final)) { SAFE_FREE(final_name); if (asprintf(&final_name, "%s/Copy #%d of %s", temp_name, i++, base) == -1) { ALLOC_CHECK(final_name, done); } TALLOC_FREE(smb_fname_final->base_name); smb_fname_final->base_name = talloc_strdup(smb_fname_final, final_name); if (smb_fname_final->base_name == NULL) { rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname); goto done; } } DEBUG(10, ("recycle: Moving %s to %s\n", smb_fname_str_dbg(smb_fname), smb_fname_str_dbg(smb_fname_final))); rc = SMB_VFS_NEXT_RENAME(handle, smb_fname, smb_fname_final); if (rc != 0) { DEBUG(3, ("recycle: Move error %d (%s), purging file %s " "(%s)\n", errno, strerror(errno), smb_fname_str_dbg(smb_fname), smb_fname_str_dbg(smb_fname_final))); rc = SMB_VFS_NEXT_UNLINK(handle, smb_fname); goto done; } /* touch access date of moved file */ if (recycle_touch(handle) == True || recycle_touch_mtime(handle)) recycle_do_touch(handle, smb_fname_final, recycle_touch_mtime(handle)); done: SAFE_FREE(path_name); SAFE_FREE(temp_name); SAFE_FREE(final_name); TALLOC_FREE(smb_fname_final); TALLOC_FREE(repository); return rc; } static struct vfs_fn_pointers vfs_recycle_fns = { .connect_fn = recycle_connect, .disconnect = recycle_disconnect, .unlink = recycle_unlink }; NTSTATUS vfs_recycle_init(void); NTSTATUS vfs_recycle_init(void) { NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "recycle", &vfs_recycle_fns); if (!NT_STATUS_IS_OK(ret)) return ret; vfs_recycle_debug_level = debug_add_class("recycle"); if (vfs_recycle_debug_level == -1) { vfs_recycle_debug_level = DBGC_VFS; DEBUG(0, ("vfs_recycle: Couldn't register custom debugging class!\n")); } else { DEBUG(10, ("vfs_recycle: Debug class number of 'recycle': %d\n", vfs_recycle_debug_level)); } return ret; }