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/*
* Copyright (c) 2018 Huawei Technologies Co.,Ltd.
* 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.
*/
#define _GNU_SOURCE
#include <pthread.h>
#include <dlfcn.h>
#include <sys/epoll.h>
#include "dmm_vcl.h"
#include "nstack_dmm_api.h" // nstack_socket_ops*
#include <vppinfra/error.h> // clib_warning()
#define DMM_VCL_ADPT_DEBUG dmm_vcl_debug
static unsigned int dmm_vcl_debug;
dmm_vcl_t g_dmm_vcl;
unsigned int
vpphs_ep_ctl_ops (int epFD, int proFD, int ctl_ops,
struct epoll_event *events, void *pdata)
{
struct epoll_event tmpEvt;
int ret = 0;
int dmm_epfd;
tmpEvt.data.ptr = pdata;
tmpEvt.events = events->events;
tmpEvt.events |= (EPOLLIN | EPOLLOUT);
if (DMM_VCL_ADPT_DEBUG > 0)
clib_warning ("DMM VCL ADPT<%d>: epfd=%d,fd=%d,ops=%d, events=%u",
getpid (), epFD, proFD, ctl_ops, events->events);
dmm_epfd = g_dmm_vcl.epfd;
switch (ctl_ops)
{
case nstack_ep_triggle_add:
ret = g_dmm_vcl.p_epoll_ctl (dmm_epfd, EPOLL_CTL_ADD, proFD, &tmpEvt);
break;
case nstack_ep_triggle_mod:
ret = g_dmm_vcl.p_epoll_ctl (dmm_epfd, EPOLL_CTL_MOD, proFD, &tmpEvt);
break;
case nstack_ep_triggle_del:
ret = g_dmm_vcl.p_epoll_ctl (dmm_epfd, EPOLL_CTL_DEL, proFD, &tmpEvt);
break;
default:
ret = -1;
break;
}
return ret;
}
#define DMM_VCL_MAX_EP_EVENT 1024
static void *
dmm_vcl_epoll_thread (void *arg)
{
int num, i;
struct epoll_event events[DMM_VCL_MAX_EP_EVENT];
while (1)
{
num =
g_dmm_vcl.p_epoll_wait (g_dmm_vcl.epfd, events, DMM_VCL_MAX_EP_EVENT,
100);
for (i = 0; i < num; ++i)
{
if (DMM_VCL_ADPT_DEBUG > 0)
clib_warning
("DMM_VCL_ADPT<%d>: dmm_vcl_epoll i[%d] events=%u, epfd=%d, ptr=%d",
getpid (), i, events[i].events, events[i].data.fd,
events[i].data.ptr);
g_dmm_vcl.regVal.event_cb (events[i].data.ptr, events[i].events);
}
}
return NULL;
}
int
dmm_vpphs_init ()
{
char *env_var_str;
int rv = 0;
env_var_str = getenv (DMM_VCL_ENV_DEBUG);
if (env_var_str)
{
u32 tmp;
if (sscanf (env_var_str, "%u", &tmp) != 1)
clib_warning
("DMM_VCL_ADPT<%d>: WARNING: Invalid debug level specified "
"in the environment variable " DMM_VCL_ENV_DEBUG " (%s)!\n",
getpid (), env_var_str);
else
{
dmm_vcl_debug = tmp;
if (DMM_VCL_ADPT_DEBUG > 0)
clib_warning
("DMM_VCL_ADPT<%d>: configured DMM VCL ADPT debug (%u) from "
"DMM_VCL_ENV_DEBUG ", getpid (), dmm_vcl_debug);
}
}
g_dmm_vcl.epfd = g_dmm_vcl.p_epoll_create (1000);
if (g_dmm_vcl.epfd < 0)
return g_dmm_vcl.epfd;
rv =
pthread_create (&g_dmm_vcl.epoll_threadid, NULL, dmm_vcl_epoll_thread,
NULL);
if (rv != 0)
{
clib_warning ("dmm vcl epoll thread create fail, errno:%d!", errno);
g_dmm_vcl.p_close (g_dmm_vcl.epfd);
g_dmm_vcl.epfd = -1;
return rv;
}
rv = pthread_setname_np (g_dmm_vcl.epoll_threadid, "dmm_vcl_epoll");
if (rv != 0)
{
clib_warning
("pthread_setname_np failed for dmm_vcl_epoll, rv=%d, errno:%d",
rv, errno);
}
return rv;
}
int
vpphs_stack_register (nstack_proc_cb * ops, nstack_event_cb * val)
{
#undef NSTACK_MK_DECL
#define NSTACK_MK_DECL(ret, fn, args) \
(ops->socket_ops).pf ## fn = (typeof(((nstack_socket_ops*)0)->pf ## fn))dlsym(val->handle, # fn);
#include "declare_syscalls.h"
(ops->socket_ops).pfepoll_create = NULL;
g_dmm_vcl.p_epoll_ctl = dlsym (val->handle, "epoll_ctl");
g_dmm_vcl.p_epoll_create = dlsym (val->handle, "epoll_create1");
g_dmm_vcl.p_epoll_wait = dlsym (val->handle, "epoll_wait");
g_dmm_vcl.p_close = dlsym (val->handle, "close");
g_dmm_vcl.regVal = *val;
ops->extern_ops.module_init = dmm_vpphs_init;
ops->extern_ops.fork_init_child = NULL;
ops->extern_ops.fork_parent_fd = NULL;
ops->extern_ops.fork_child_fd = NULL;
ops->extern_ops.fork_free_fd = NULL;
ops->extern_ops.ep_ctl = vpphs_ep_ctl_ops;
ops->extern_ops.ep_prewait_proc = NULL;
ops->extern_ops.stack_fd_check = NULL;
ops->extern_ops.stack_alloc_fd = NULL;
ops->extern_ops.peak = NULL;
return 0;
}
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