2 * Unix SMB/CIFS implementation.
3 * Samba VFS module for error injection in VFS calls
4 * Copyright (C) Christof Schmitt 2017
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 #include "smbd/smbd.h"
24 #define DBGC_CLASS DBGC_VFS
26 struct unix_error_map {
29 } unix_error_map_array[] = {
35 static int find_unix_error_from_string(const char *err_str)
39 for (i = 0; i < ARRAY_SIZE(unix_error_map_array); i++) {
40 struct unix_error_map *m = &unix_error_map_array[i];
42 if (strequal(err_str, m->err_str)) {
50 static int inject_unix_error(const char *vfs_func, vfs_handle_struct *handle)
54 err_str = lp_parm_const_string(SNUM(handle->conn),
55 "error_inject", vfs_func, NULL);
57 if (err_str != NULL) {
60 error = find_unix_error_from_string(err_str);
62 DBG_WARNING("Returning error %s for VFS function %s\n",
67 if (strequal(err_str, "panic")) {
68 DBG_ERR("Panic in VFS function %s\n", vfs_func);
69 smb_panic("error_inject");
72 DBG_ERR("Unknown error inject %s requested "
73 "for vfs function %s\n", err_str, vfs_func);
79 static int vfs_error_inject_chdir(vfs_handle_struct *handle,
80 const struct smb_filename *smb_fname)
84 error = inject_unix_error("chdir", handle);
90 return SMB_VFS_NEXT_CHDIR(handle, smb_fname);
93 static ssize_t vfs_error_inject_pwrite(vfs_handle_struct *handle,
101 error = inject_unix_error("pwrite", handle);
107 return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
110 static int vfs_error_inject_open(
111 struct vfs_handle_struct *handle,
112 struct smb_filename *smb_fname,
117 int error = inject_unix_error("open", handle);
122 return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
125 static struct vfs_fn_pointers vfs_error_inject_fns = {
126 .chdir_fn = vfs_error_inject_chdir,
127 .pwrite_fn = vfs_error_inject_pwrite,
128 .open_fn = vfs_error_inject_open,
132 NTSTATUS vfs_error_inject_init(TALLOC_CTX *ctx)
134 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "error_inject",
135 &vfs_error_inject_fns);