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authorFlorin Coras <fcoras@cisco.com>2021-06-02 21:32:39 -0700
committerDave Barach <openvpp@barachs.net>2021-06-03 14:25:17 +0000
commit821b5002bf5cd18e1ec7750ff1b6fb379b241869 (patch)
treee8c90aa8779c21cadc0bd6f83652b3d64ef2d079 /src/vppinfra/cpu.c
parent67c90a32b7ad0c5a38c483ce849cc7a231e7ba54 (diff)
session: avoid ct connects loop
Type: fix Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I99af136ecab9be1f9e00de6d197b8f1c74ab4b20
Diffstat (limited to 'src/vppinfra/cpu.c')
0 files changed, 0 insertions, 0 deletions
> 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation
 */

#include <sys/queue.h>
#include <stdint.h>
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <inttypes.h>

#include <rte_memory.h>
#include <rte_launch.h>
#include <rte_eal.h>
#include <rte_eal_memconfig.h>
#include <rte_per_lcore.h>
#include <rte_lcore.h>
#include <rte_atomic.h>
#include <rte_branch_prediction.h>
#include <rte_log.h>
#include <rte_string_fns.h>
#include <rte_debug.h>

#include "eal_private.h"

TAILQ_HEAD(rte_tailq_elem_head, rte_tailq_elem);
/* local tailq list */
static struct rte_tailq_elem_head rte_tailq_elem_head =
	TAILQ_HEAD_INITIALIZER(rte_tailq_elem_head);

/* number of tailqs registered, -1 before call to rte_eal_tailqs_init */
static int rte_tailqs_count = -1;

struct rte_tailq_head *
rte_eal_tailq_lookup(const char *name)
{
	unsigned i;
	struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;

	if (name == NULL)
		return NULL;

	for (i = 0; i < RTE_MAX_TAILQ; i++) {
		if (!strncmp(name, mcfg->tailq_head[i].name,
			     RTE_TAILQ_NAMESIZE-1))
			return &mcfg->tailq_head[i];
	}

	return NULL;
}

void
rte_dump_tailq(FILE *f)
{
	struct rte_mem_config *mcfg;
	unsigned i = 0;

	mcfg = rte_eal_get_configuration()->mem_config;

	rte_rwlock_read_lock(&mcfg->qlock);
	for (i = 0; i < RTE_MAX_TAILQ; i++) {
		const struct rte_tailq_head *tailq = &mcfg->tailq_head[i];
		const struct rte_tailq_entry_head *head = &tailq->tailq_head;

		fprintf(f, "Tailq %u: qname:<%s>, tqh_first:%p, tqh_last:%p\n",
			i, tailq->name, head->tqh_first, head->tqh_last);
	}
	rte_rwlock_read_unlock(&mcfg->qlock);
}

static struct rte_tailq_head *
rte_eal_tailq_create(const char *name)
{
	struct rte_tailq_head *head = NULL;

	if (!rte_eal_tailq_lookup(name) &&
	    (rte_tailqs_count + 1 < RTE_MAX_TAILQ)) {
		struct rte_mem_config *mcfg;

		mcfg = rte_eal_get_configuration()->mem_config;
		head = &mcfg->tailq_head[rte_tailqs_count];
		snprintf(head->name, sizeof(head->name) - 1, "%s", name);
		TAILQ_INIT(&head->tailq_head);
		rte_tailqs_count++;
	}

	return head;
}

/* local register, used to store "early" tailqs before rte_eal_init() and to
 * ensure secondary process only registers tailqs once. */
static int
rte_eal_tailq_local_register(struct rte_tailq_elem *t)
{
	struct rte_tailq_elem *temp;

	TAILQ_FOREACH(temp, &rte_tailq_elem_head, next) {
		if (!strncmp(t->name, temp->name, sizeof(temp->name)))
			return -1;
	}

	TAILQ_INSERT_TAIL(&rte_tailq_elem_head, t, next);
	return 0;
}

static void
rte_eal_tailq_update(struct rte_tailq_elem *t)
{
	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
		/* primary process is the only one that creates */
		t->head = rte_eal_tailq_create(t->name);
	} else {
		t->head = rte_eal_tailq_lookup(t->name);
	}
}

int
rte_eal_tailq_register(struct rte_tailq_elem *t)
{
	if (rte_eal_tailq_local_register(t) < 0) {
		RTE_LOG(ERR, EAL,
			"%s tailq is already registered\n", t->name);
		goto error;
	}

	/* if a register happens after rte_eal_tailqs_init(), then we can update
	 * tailq head */
	if (rte_tailqs_count >= 0) {
		rte_eal_tailq_update(t);
		if (t->head == NULL) {
			RTE_LOG(ERR, EAL,
				"Cannot initialize tailq: %s\n", t->name);
			TAILQ_REMOVE(&rte_tailq_elem_head, t, next);
			goto error;
		}
	}

	return 0;

error:
	t->head = NULL;
	return -1;
}

int
rte_eal_tailqs_init(void)
{
	struct rte_tailq_elem *t;

	rte_tailqs_count = 0;

	TAILQ_FOREACH(t, &rte_tailq_elem_head, next) {
		/* second part of register job for "early" tailqs, see
		 * rte_eal_tailq_register and EAL_REGISTER_TAILQ */
		rte_eal_tailq_update(t);
		if (t->head == NULL) {
			RTE_LOG(ERR, EAL,
				"Cannot initialize tailq: %s\n", t->name);
			/* TAILQ_REMOVE not needed, error is already fatal */
			goto fail;
		}
	}

	return 0;

fail:
	rte_dump_tailq(stderr);
	return -1;
}