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/*
* Copyright (c) 2018 Ant Financial Services Group.
* 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 <sys/time.h>
#include <sys/resource.h>
#include <string.h>
#include "fd.h"
#include "log.h"
#include "util.h"
#include "config.h"
bool fd_table_initialized;
struct fd_table fd_table = { .fd_base = INT_MAX, };
static int
get_ulimit_nofile(void)
{
struct rlimit rlim;
#define GLUE_BASE_FD 1024
if (getrlimit(RLIMIT_NOFILE, &rlim) < 0)
return GLUE_BASE_FD;
return rlim.rlim_cur; /* soft limit, rlim_max is the hard limit */
}
static void
fd_num_set(int *fd_base, int *fd_num)
{
int limit = get_ulimit_nofile();
/* fix me: alignment of power of two */
/* fix me: use dup2 to occupy these fds */
*fd_num = limit / 2;
*fd_num = RTE_MIN(MAX_STREAMS_PER_CORE * 2 * MAX_NB_CTX, *fd_num);
*fd_base = limit - *fd_num;
GLUE_LOG(INFO, "fd_base = %d, fd_num = %d", *fd_base, *fd_num);
}
static void
add_fd(struct rte_mempool *mp __rte_unused, void *opaque __rte_unused,
void *obj, unsigned obj_idx)
{
((struct sock *)obj)->fd = obj_idx + fd_table.fd_base;
fd_table.socks[obj_idx] = obj;
}
void
fd_init(void)
{
int ret;
size_t sz;
uint32_t socket_id;
int fd_base, fd_num;
struct rte_mempool *mp = NULL;
char name[RTE_MEMPOOL_NAMESIZE];
socket_id = get_socket_id();
fd_num_set(&fd_base, &fd_num);
sz = sizeof(fd_table.socks[0]) * fd_num;
fd_table.socks = rte_zmalloc_socket("fdtable", sz,
RTE_CACHE_LINE_SIZE, socket_id);
if (fd_table.socks == NULL) {
GLUE_LOG(ERR, "Failed to malloc fd table");
goto err;
}
snprintf(name, RTE_MEMPOOL_NAMESIZE, "mp_fd_%d_%d", fd_base, fd_num);
mp = rte_mempool_create_empty(name, fd_num - 1, sizeof(struct sock),
32, 0, socket_id, MEMPOOL_F_DYNAMIC);
if (mp == NULL) {
GLUE_LOG(ERR, "Failed to create mp for fd table");
goto err;
}
GLUE_LOG(INFO, "sizeof(struct sock): %lu, elt_size of fd table = %u",
sizeof(struct sock), mp->elt_size);
ret = rte_mempool_set_ops_byname(mp, "ring_mp_mc", NULL);
if (ret != 0) {
GLUE_LOG(ERR, "Failed to set mp ops: %d", ret);
goto err;
}
rte_mempool_set_dynamic_size(mp, 1024);
rte_mempool_set_dynamic_cb(mp, add_fd);
fd_table.mp = mp;
fd_table.fd_base = fd_base;
fd_table.fd_num = fd_num;
/* should populate after fd_table is set */
ret = rte_mempool_populate_default(mp);
if (ret < 0) {
GLUE_LOG(ERR, "Failed to populate mp: %d", ret);
goto err;
}
fd_table_initialized = true;
return;
err:
rte_mempool_free(mp);
rte_panic("Failed to init fd_table");
}
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