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.highlight/*
* Copyright (c) 2018 Intel and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/api_errno.h>
#include <vlib/node_funcs.h>
#include <openssl/engine.h>
#include <tlsopenssl/tls_openssl.h>
#define MAX_SESSION 4096
#define MAX_VECTOR_ASYNC 256
#define SSL_ASYNC_INFLIGHT 1
#define SSL_ASYNC_PENDING 2
#define SSL_ASYNC_READY 3
#define EMPTY_STRUCT {0}
typedef struct openssl_tls_callback_arg_
{
int thread_index;
int event_index;
} openssl_tls_callback_arg_t;
typedef struct openssl_event_
{
int status;
u32 event_index;
u8 thread_index;
u32 ctx_index;
openssl_resume_handler *handler;
openssl_tls_callback_t engine_callback;
openssl_tls_callback_arg_t cb_args;
int next;
} openssl_evt_t;
typedef struct openssl_async_status_
{
int evt_run_head;
int evt_run_tail;
int evt_pending_head;
int poll_config;
} openssl_async_status_t;
typedef struct openssl_async_
{
openssl_evt_t ***evt_pool;
openssl_async_status_t *status;
void (*polling) (void);
void (*polling_conf) (void);
u8 start_polling;
ENGINE *engine;
} openssl_async_t;
void qat_polling ();
void qat_pre_init ();
void qat_polling_config ();
void dasync_polling ();
struct engine_polling
{
char *engine;
void (*polling) (void);
void (*pre_init) (void);
void (*polling_conf) (void);
};
struct engine_polling engine_list[] = {
{"qat", qat_polling, qat_pre_init, qat_polling_config},
{"dasync", dasync_polling, NULL, NULL}
};
openssl_async_t openssl_async_main;
static vlib_node_registration_t tls_async_process_node;
/* to avoid build warning */
void session_send_rpc_evt_to_thread (u32 thread_index, void *fp,
void *rpc_args);
void
evt_pool_init (vlib_main_t * vm)
{
vlib_thread_main_t *vtm = vlib_get_thread_main ();
openssl_async_t *om = &openssl_async_main;
int i, num_threads;
num_threads = 1 /* main thread */ + vtm->n_threads;
TLS_DBG (2, "Totally there is %d thread\n", num_threads);
vec_validate (om->evt_pool, num_threads - 1);
vec_validate (om->status, num_threads - 1);
om->start_polling = 0;
om->engine = 0;
for (i = 0; i < num_threads; i++)
{
om->status[i].evt_run_head = -1;
om->status[i].evt_run_tail = -1;
om->status[i].evt_pending_head = -1;
}
om->polling = NULL;
openssl_async_node_enable_disable (0);
return;
}
int
openssl_engine_register (char *engine_name, char *algorithm)
{
int i, registered = -1;
openssl_async_t *om = &openssl_async_main;
void (*p) (void);
ENGINE *engine;
for (i = 0; i < ARRAY_LEN (engine_list); i++)
{
if (!strcmp (engine_list[i].engine, engine_name))
{
om->polling = engine_list[i].polling;
om->polling_conf = engine_list[i].polling_conf;
registered = i;
}
}
if (registered < 0)
{
clib_error ("engine %s is not regisered in VPP", engine_name);
return -1;
}
ENGINE_load_builtin_engines ();
ENGINE_load_dynamic ();
engine = ENGINE_by_id (engine_name);
if (engine == NULL)
{
clib_warning ("Failed to find engine ENGINE_by_id %s", engine_name);
return -1;
}
om->engine = engine;
/* call pre-init */
p = engine_list[registered].pre_init;
if (p)
(*p) ();
if (algorithm)
{
if (!ENGINE_set_default_string (engine, algorithm))
{
clib_warning ("Failed to set engine %s algorithm %s\n",
engine_name, algorithm);
return -1;
}
}
else
{
if (!ENGINE_set_default (engine, ENGINE_METHOD_ALL))
{
clib_warning ("Failed to set engine %s to all algorithm",
engine_name);
return -1;
}
}
om->start_polling = 1;
return 0;
}
static openssl_evt_t *
openssl_evt_get (u32 evt_index)
{
openssl_evt_t **evt;
evt =
pool_elt_at_index (openssl_async_main.evt_pool[vlib_get_thread_index ()],
evt_index);
return *evt;
}
static openssl_evt_t *
openssl_evt_get_w_thread (int evt_index, u8 thread_index)
{
openssl_evt_t **evt;
evt =
pool_elt_at_index (openssl_async_main.evt_pool[thread_index], evt_index);
return *evt;
}
int
openssl_evt_free (int event_idx, u8 thread_index)
{
openssl_evt_t *evt;
openssl_async_t *om = &openssl_async_main;
int *evt_run_tail = &om->status[thread_index].evt_run_tail;
if (event_idx < 0)
return 0;
evt = openssl_evt_get_w_thread (event_idx, thread_index);
evt->status = 0;
/*pool operation */
pool_put_index (om->evt_pool[thread_index], event_idx);
if (*evt_run_tail == event_idx)
*evt_run_tail = -1;
return 1;
}
static u32
openssl_evt_alloc (void)
{
u8 thread_index = vlib_get_thread_index ();
openssl_async_t *tm = &openssl_async_main;
openssl_evt_t **evt;
pool_get (tm->evt_pool[thread_index], evt);
if (!(*evt))
*evt = clib_mem_alloc (sizeof (openssl_evt_t));
clib_memset (*evt, 0, sizeof (openssl_evt_t));
(*evt)->event_index = evt - tm->evt_pool[thread_index];
return ((*evt)->event_index);
}
int
tls_async_openssl_callback (SSL * s, void *evt)
{
openssl_evt_t *event, *event_tail;
openssl_async_t *om = &openssl_async_main;
openssl_tls_callback_arg_t *args = (openssl_tls_callback_arg_t *) evt;
int thread_index = args->thread_index;
int event_index = args->event_index;
int *evt_run_tail = &om->status[thread_index].evt_run_tail;
int *evt_run_head = &om->status[thread_index].evt_run_head;
TLS_DBG (2, "Set event %d to run\n", event_index);
event = openssl_evt_get_w_thread (event_index, thread_index);
if (event->status == SSL_ASYNC_READY)
return 0;
event->status = SSL_ASYNC_READY;
event->next = -1;
if (*evt_run_tail >= 0)
{
event_tail = openssl_evt_get_w_thread (*evt_run_tail, thread_index);
event_tail->next = event_index;
}
*evt_run_tail = event_index;
if (*evt_run_head < 0)
{
*evt_run_head = event_index;
}
return 1;
}
openssl_tls_callback_t *
vpp_add_async_pending_event (tls_ctx_t * ctx,
openssl_resume_handler * handler)
{
u32 eidx;
openssl_evt_t *event;
openssl_async_t *om = &openssl_async_main;
openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
int *evt_pending_head;
u32 thread_id = ctx->c_thread_index;
eidx = openssl_evt_alloc ();
event = openssl_evt_get (eidx);
event->ctx_index = oc->openssl_ctx_index;
event->status = SSL_ASYNC_PENDING;
event->handler = handler;
event->cb_args.event_index = eidx;
event->cb_args.thread_index = thread_id;
event->engine_callback.callback = tls_async_openssl_callback;
event->engine_callback.arg = &event->cb_args;
/* add to pending list */
evt_pending_head = &om->status[thread_id].evt_pending_head;
event->next = *evt_pending_head;
*evt_pending_head = eidx;
return &event->engine_callback;
}
int
vpp_add_async_run_event (tls_ctx_t * ctx, openssl_resume_handler * handler)
{
u32 eidx;
openssl_evt_t *event;
openssl_ctx_t *oc = (openssl_ctx_t *) ctx;
u32 thread_id = ctx->c_thread_index;
eidx = openssl_evt_alloc ();
event = openssl_evt_get (eidx);
event->ctx_index = oc->openssl_ctx_index;
event->status = SSL_ASYNC_PENDING;
event->handler = handler;
event->cb_args.event_index = eidx;
event->cb_args.thread_index = thread_id;
event->engine_callback.callback = tls_async_openssl_callback;
event->engine_callback.arg = &event->cb_args;
/* This is a retry event, and need to put to ring to make it run again */
return tls_async_openssl_callback (NULL, &event->cb_args);
}
void
event_handler (void *tls_async)
{
openssl_resume_handler *handler;
openssl_evt_t *callback;
session_t *tls_session;
int thread_index;
tls_ctx_t *ctx;
callback = (openssl_evt_t *) tls_async;
thread_index = callback->cb_args.thread_index;
ctx = openssl_ctx_get_w_thread (callback->ctx_index, thread_index);
handler = callback->handler;
tls_session = session_get_from_handle (ctx->tls_session_handle);
if (handler)
{
(*handler) (ctx, tls_session);
}
/* Need to free the event */
openssl_evt_free (callback->cb_args.event_index, thread_index);
return;
}
/* engine specific code to polling the response ring */
void
dasync_polling ()
{
/* dasync is a fake async device, and could not be polled.
* We have added code in the dasync engine to triggered the callback already,
* so nothing can be done here
*/
}
void
qat_pre_init ()
{
openssl_async_t *om = &openssl_async_main;
ENGINE_ctrl_cmd (om->engine, "ENABLE_EXTERNAL_POLLING", 0, NULL, NULL, 0);
}
/* Below code is spefic to QAT engine, and other vendors can refer to this code to enable a new engine */
void
qat_polling_config ()
{
openssl_async_t *om = &openssl_async_main;
u8 thread_index = vlib_get_thread_index ();
int *config;
config = &om->status[thread_index].poll_config;
if (PREDICT_TRUE (*config))
return;
ENGINE_ctrl_cmd (om->engine, "SET_INSTANCE_FOR_THREAD", thread_index,
NULL, NULL, 0);
*config = 1;
TLS_DBG (2, "set thread %d and instance %d mapping\n", thread_index,
thread_index);
}
void
qat_polling ()
{
openssl_async_t *om = &openssl_async_main;
int poll_status = 0;
if (om->start_polling)
{
ENGINE_ctrl_cmd (om->engine, "POLL", 0, &poll_status, NULL, 0);
}
}
void
openssl_async_polling ()
{
openssl_async_t *om = &openssl_async_main;
if (om->polling)
{
(*om->polling) ();
}
}
void
openssl_async_node_enable_disable (u8 is_en)
{
u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED;
/* *INDENT-OFF* */
foreach_vlib_main (({
vlib_node_set_state (this_vlib_main, tls_async_process_node.index,
state);
}));
/* *INDENT-ON* */
}
int
tls_async_do_job (int eidx, u32 thread_index)
{
tls_ctx_t *ctx;
openssl_evt_t *event;
/* do the real job */
event = openssl_evt_get_w_thread (eidx, thread_index);
ctx = openssl_ctx_get_w_thread (event->ctx_index, thread_index);
if (ctx)
{
ctx->resume = 1;
session_send_rpc_evt_to_thread (thread_index, event_handler, event);
}
return 1;
}
int
tls_resume_from_crypto (int thread_index)
{
int i;
openssl_async_t *om = &openssl_async_main;
openssl_evt_t *event;
int *evt_run_head = &om->status[thread_index].evt_run_head;
if (*evt_run_head < 0)
return 0;
for (i = 0; i < MAX_VECTOR_ASYNC; i++)
{
if (*evt_run_head >= 0)
{
event = openssl_evt_get_w_thread (*evt_run_head, thread_index);
TLS_DBG (2, "event run = %d\n", *evt_run_head);
tls_async_do_job (*evt_run_head, thread_index);
*evt_run_head = event->next;
}
else
{
break;
}
}
return 0;
}
static clib_error_t *
tls_async_init (vlib_main_t * vm)
{
evt_pool_init (vm);
return 0;
}
static uword
tls_async_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
vlib_frame_t * f)
{
u8 thread_index;
openssl_async_t *om = &openssl_async_main;
if (om->polling_conf)
(*om->polling_conf) ();
thread_index = vlib_get_thread_index ();
if (pool_elts (om->evt_pool[thread_index]) > 0)
{
openssl_async_polling ();
tls_resume_from_crypto (thread_index);
}
return 0;
}
VLIB_INIT_FUNCTION (tls_async_init);
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (tls_async_process_node,static) = {
.function = tls_async_process,
.type = VLIB_NODE_TYPE_INPUT,
.name = "tls-async-process",
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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