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vfs_error_inject: add 'error_inject:durable_reconnect = st_ex_nlink'

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This allows to simulate durable reconnect failures because the stat
information of the file changed.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15624

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
(cherry picked from commit 692ed832df)
This commit is contained in:
Stefan Metzmacher 2024-08-26 14:11:02 +02:00 committed by Jule Anger
parent 46ac92e15e
commit b492185982
1 changed files with 76 additions and 0 deletions
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76
source3/modules/vfs_error_inject.c
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@ -19,6 +19,7 @@
#include "includes.h"
#include "smbd/smbd.h"
#include "librpc/gen_ndr/ndr_open_files.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_VFS
@ -204,11 +205,86 @@ static int vfs_error_inject_unlinkat(struct vfs_handle_struct *handle,
return -1;
}
static NTSTATUS vfs_error_inject_durable_reconnect(struct vfs_handle_struct *handle,
struct smb_request *smb1req,
struct smbXsrv_open *op,
const DATA_BLOB old_cookie,
TALLOC_CTX *mem_ctx,
struct files_struct **fsp,
DATA_BLOB *new_cookie)
{
const char *vfs_func = "durable_reconnect";
const char *err_str = NULL;
NTSTATUS status;
enum ndr_err_code ndr_err;
struct vfs_default_durable_cookie cookie;
DATA_BLOB modified_cookie = data_blob_null;
err_str = lp_parm_const_string(SNUM(handle->conn),
"error_inject",
vfs_func,
NULL);
if (err_str == NULL) {
return SMB_VFS_NEXT_DURABLE_RECONNECT(handle,
smb1req,
op,
old_cookie,
mem_ctx,
fsp,
new_cookie);
}
ndr_err = ndr_pull_struct_blob(&old_cookie, talloc_tos(), &cookie,
(ndr_pull_flags_fn_t)ndr_pull_vfs_default_durable_cookie);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
status = ndr_map_error2ntstatus(ndr_err);
return status;
}
if (strcmp(cookie.magic, VFS_DEFAULT_DURABLE_COOKIE_MAGIC) != 0) {
return NT_STATUS_INVALID_PARAMETER;
}
if (cookie.version != VFS_DEFAULT_DURABLE_COOKIE_VERSION) {
return NT_STATUS_INVALID_PARAMETER;
}
if (strequal(err_str, "st_ex_nlink")) {
cookie.stat_info.st_ex_nlink += 1;
} else {
DBG_ERR("Unknown error inject %s requested "
"for vfs function %s\n", err_str, vfs_func);
return SMB_VFS_NEXT_DURABLE_RECONNECT(handle,
smb1req,
op,
old_cookie,
mem_ctx,
fsp,
new_cookie);
}
ndr_err = ndr_push_struct_blob(&modified_cookie, talloc_tos(), &cookie,
(ndr_push_flags_fn_t)ndr_push_vfs_default_durable_cookie);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
status = ndr_map_error2ntstatus(ndr_err);
return status;
}
return SMB_VFS_NEXT_DURABLE_RECONNECT(handle,
smb1req,
op,
modified_cookie,
mem_ctx,
fsp,
new_cookie);
}
static struct vfs_fn_pointers vfs_error_inject_fns = {
.chdir_fn = vfs_error_inject_chdir,
.pwrite_fn = vfs_error_inject_pwrite,
.openat_fn = vfs_error_inject_openat,
.unlinkat_fn = vfs_error_inject_unlinkat,
.durable_reconnect_fn = vfs_error_inject_durable_reconnect,
};
static_decl_vfs;