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ctrl.c
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/*
* DPVS is a software load balancer (Virtual Server) based on DPDK.
*
* Copyright (C) 2017 iQIYI (www.iqiyi.com).
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <sys/socket.h>
#include <fcntl.h>
#include <sys/un.h>
#include <unistd.h>
#include <libgen.h>
#include <string.h>
#include <assert.h>
#include "ctrl.h"
#include "netif.h"
#include "mempool.h"
#include "parser/parser.h"
#include "scheduler.h"
/////////////////////////////////// lcore msg ///////////////////////////////////////////
#define MSG_MAX_LCORE_SUPPORTED 64
uint64_t slave_lcore_mask; /* bit-wise enabled lcores */
uint8_t slave_lcore_nb; /* slave lcore number */
lcoreid_t master_lcore; /* master lcore id */
struct dpvs_mempool *msg_pool; /* memory pool for msg */
#define MSG_TIMEOUT_US 2000
static int g_msg_timeout = MSG_TIMEOUT_US;
static uint8_t g_msg_prio = MSG_PRIO_LOW;
#define DPVS_MT_BITS 8
#define DPVS_MT_LEN (1 << DPVS_MT_BITS)
#define DPVS_MT_MASK (DPVS_MT_LEN - 1)
#define DPVS_MSG_RING_SIZE_DEF 4096
#define DPVS_MSG_RING_SIZE_MIN 256
#define DPVS_MSG_RING_SIZE_MAX 524288
static uint32_t msg_ring_size = DPVS_MSG_RING_SIZE_DEF;
/* per-lcore msg-type array */
typedef struct list_head msg_type_array_t[DPVS_MT_LEN];
typedef rte_rwlock_t msg_type_lock_t[DPVS_MT_LEN];
msg_type_array_t mt_array[DPVS_MAX_LCORE];
msg_type_lock_t mt_lock[DPVS_MAX_LCORE];
/* multicast msg hlist, to collect reply msg from slaves (used on master lcore only) */
#define DPVS_MC_HLIST_BITS 8
#define DPVS_MC_HLIST_LEN (1 << DPVS_MC_HLIST_BITS)
#define DPVS_MC_HLIST_MASK (DPVS_MC_HLIST_LEN - 1)
struct list_head mc_wait_hlist[DPVS_MC_HLIST_LEN];
/* per-lcore msg queue */
struct rte_ring *msg_ring[DPVS_MAX_LCORE];
#ifdef CONFIG_MSG_DEBUG
rte_atomic64_t n_msg_allc;
rte_atomic64_t n_msg_free;
rte_atomic32_t n_msg_using;
inline static void msg_debug_init(void)
{
rte_atomic64_init(&n_msg_allc);
rte_atomic64_init(&n_msg_free);
rte_atomic32_init(&n_msg_using);
}
inline static void msg_debug_alloc(void)
{
rte_atomic64_inc(&n_msg_allc);
rte_atomic32_inc(&n_msg_using);
}
inline static void msg_debug_free(void)
{
rte_atomic64_inc(&n_msg_free);
rte_atomic32_dec(&n_msg_using);
}
inline static void msg_debug_dump(void)
{
uint64_t allc;
allc = rte_atomic64_read(&n_msg_allc);
if (likely(allc % 100000))
return;
RTE_LOG(INFO, MSGMGR, "%s: allocated=%ld, freed=%ld, processing=%d\n",
__func__, allc, rte_atomic64_read(&n_msg_free),
rte_atomic32_read(&n_msg_using));
}
inline static int msg_memory_stats(char *buf, int len)
{
snprintf(buf, len,
"allocated:%ld, freed:%ld, processing:%d",
rte_atomic64_read(&n_msg_allc),
rte_atomic64_read(&n_msg_free),
rte_atomic32_read(&n_msg_using));
return strlen(buf);
}
#else
inline static void msg_debug_init(void) {}
inline static void msg_debug_alloc(void) {}
inline static void msg_debug_free(void) {}
inline static void msg_debug_dump(void) {}
inline static int msg_memory_stats(char *buf, int len) { return 0; }
#endif
static inline int mc_queue_hashkey(msgid_t type, uint32_t seq)
{
return (((uint32_t)type) ^ seq) & DPVS_MC_HLIST_MASK;
}
/* only be called on master lcore, thus no lock needed */
static inline void mc_queue_hash(struct dpvs_multicast_queue *mcq)
{
int hashkey;
if (unlikely(!mcq))
return;
hashkey = mc_queue_hashkey(mcq->type, mcq->seq);
list_add_tail(&mcq->list, &mc_wait_hlist[hashkey]);
}
static inline void mc_queue_unhash(struct dpvs_multicast_queue *mcq)
{
if (unlikely(!mcq))
return;
list_del_init(&mcq->list);
}
static inline struct dpvs_multicast_queue* mc_queue_get(msgid_t type, uint32_t seq)
{
int hashkey;
struct dpvs_multicast_queue *mcq;
assert(rte_lcore_id() == master_lcore);
hashkey = mc_queue_hashkey(type, seq);
list_for_each_entry(mcq, &mc_wait_hlist[hashkey], list) {
if (mcq->type == type && mcq->seq == seq) {
return mcq;
}
}
return NULL;
}
static inline int mt_hashkey(msgid_t type)
{
return type & DPVS_MT_MASK;
}
static struct dpvs_msg_type* msg_type_get(msgid_t type, lcoreid_t cid)
{
int hashkey = mt_hashkey(type);
struct dpvs_msg_type *mt;
if (unlikely(cid >= DPVS_MAX_LCORE))
return NULL;
rte_rwlock_read_lock(&mt_lock[cid][hashkey]);
list_for_each_entry(mt, &mt_array[cid][hashkey], list) {
if (type == mt->type /*&& mode == mt->mode*/) {
rte_atomic32_inc(&mt->refcnt);
rte_rwlock_read_unlock(&mt_lock[cid][hashkey]);
return mt;
}
}
rte_rwlock_read_unlock(&mt_lock[cid][hashkey]);
return NULL;
}
static inline void msg_type_put(struct dpvs_msg_type *mt)
{
if (unlikely(NULL == mt))
return;
rte_atomic32_dec(&mt->refcnt);
}
int msg_type_register(const struct dpvs_msg_type *msg_type)
{
int hashkey;
struct dpvs_msg_type *mt;
if (unlikely(NULL == msg_type || msg_type->cid >= DPVS_MAX_LCORE)) {
RTE_LOG(WARNING, MSGMGR, "%s: invalid args !\n", __func__);
return EDPVS_INVAL;
}
hashkey = mt_hashkey(msg_type->type);
mt = msg_type_get(msg_type->type, /*msg_type->mode, */msg_type->cid);
if (NULL != mt) {
RTE_LOG(WARNING, MSGMGR, "%s: msg type %d mode %s already registered\n",
__func__, mt->type, mt->mode == DPVS_MSG_UNICAST ? "UNICAST" : "MULTICAST");
msg_type_put(mt);
return EDPVS_EXIST;
}
mt = rte_zmalloc("msg_type", sizeof(struct dpvs_msg_type), RTE_CACHE_LINE_SIZE);
if (unlikely(NULL == mt)) {
RTE_LOG(ERR, MSGMGR, "%s: no memory !\n", __func__);
return EDPVS_NOMEM;
}
memcpy(mt, msg_type, sizeof(struct dpvs_msg_type));
rte_atomic32_set(&mt->refcnt, 0);
rte_rwlock_write_lock(&mt_lock[msg_type->cid][hashkey]);
list_add_tail(&mt->list, &mt_array[msg_type->cid][hashkey]);
rte_rwlock_write_unlock(&mt_lock[msg_type->cid][hashkey]);
return EDPVS_OK;
}
int msg_type_unregister(const struct dpvs_msg_type *msg_type)
{
int hashkey;
struct dpvs_msg_type *mt;
if (unlikely(NULL == msg_type) || msg_type->cid >= DPVS_MAX_LCORE) {
RTE_LOG(WARNING, MSGMGR, "%s: invalid args !\n", __func__);
return EDPVS_INVAL;
}
hashkey = mt_hashkey(msg_type->type);
mt = msg_type_get(msg_type->type, /*msg_type->mode, */msg_type->cid);
if (NULL == mt) {
RTE_LOG(WARNING, MSGMGR, "%s: msg type %d mode %s not yet registered\n",
__func__, msg_type->type, msg_type->mode == DPVS_MSG_UNICAST ? "UNINCAST" : "MULTICAST");
return EDPVS_NOTEXIST;
}
rte_rwlock_write_lock(&mt_lock[msg_type->cid][hashkey]);
list_del_init(&mt->list);
rte_rwlock_write_unlock(&mt_lock[msg_type->cid][hashkey]);
msg_type_put(mt);
DPVS_WAIT_WHILE(rte_atomic32_read(&mt->refcnt) > 0);
rte_free(mt);
return EDPVS_OK;
}
inline static int default_mc_msg_cb(__rte_unused struct dpvs_multicast_queue *mcq)
{
return EDPVS_OK;
}
int msg_type_mc_register(const struct dpvs_msg_type *msg_type)
{
lcoreid_t cid;
struct dpvs_msg_type mt;
int ret = EDPVS_OK;
if (unlikely(NULL == msg_type))
return EDPVS_INVAL;
memset(&mt, 0, sizeof(mt));
mt.type = msg_type->type;
mt.mode = DPVS_MSG_MULTICAST;
for (cid = 0; cid < DPVS_MAX_LCORE; cid++) {
if (cid == master_lcore) {
mt.cid = cid;
mt.prio = msg_type->prio;
mt.unicast_msg_cb = NULL;
if (msg_type->multicast_msg_cb)
mt.multicast_msg_cb = msg_type->multicast_msg_cb;
else /* if no multicast callback given, then a default one is used, which do nothing now */
mt.multicast_msg_cb = default_mc_msg_cb;
} else if (slave_lcore_mask & (1L << cid)) {
mt.cid = cid;
mt.prio = MSG_PRIO_IGN; /* multi reply msg should always be sent */
mt.unicast_msg_cb = msg_type->unicast_msg_cb;
mt.multicast_msg_cb = NULL;
} else
continue;
ret = msg_type_register(&mt);
if (unlikely(ret < 0)) {
RTE_LOG(ERR, MSGMGR, "%s: fail to register multicast msg on lcore %d\n", __func__, cid);
return ret;
}
}
return EDPVS_OK;
}
int msg_type_mc_unregister(const struct dpvs_msg_type *msg_type)
{
lcoreid_t cid;
struct dpvs_msg_type mt;
int ret = EDPVS_OK;
if (unlikely(NULL == msg_type))
return EDPVS_INVAL;
memset(&mt, 0, sizeof(mt));
mt.type = msg_type->type;
mt.mode = DPVS_MSG_MULTICAST;
for (cid = 0; cid < DPVS_MAX_LCORE; cid++) {
if (cid == master_lcore) {
mt.cid = cid;
mt.prio = msg_type->prio;
mt.unicast_msg_cb = NULL;
if (msg_type->multicast_msg_cb)
mt.multicast_msg_cb = msg_type->multicast_msg_cb;
else
mt.multicast_msg_cb = default_mc_msg_cb;
} else if (slave_lcore_mask & (1L << cid)) {
mt.cid = cid;
mt.prio = MSG_PRIO_IGN;
mt.unicast_msg_cb = msg_type->unicast_msg_cb;
mt.multicast_msg_cb = NULL;
} else
continue;
ret = msg_type_unregister(&mt);
if (unlikely(ret < 0)) {
RTE_LOG(ERR, MSGMGR, "%s: fail to unregister mulitcast msg on lcore %d\n",
__func__, cid);
return ret;
}
}
return EDPVS_OK;
}
void* msg_reply_alloc(int size)
{
return dpvs_mempool_get(msg_pool, size);
}
void msg_reply_free(void *mptr)
{
return dpvs_mempool_put(msg_pool, mptr);
}
struct dpvs_msg* msg_make(msgid_t type, uint32_t seq,
msg_mode_t mode,
lcoreid_t cid,
uint32_t len, const void *data)
{
int total_len;
struct dpvs_msg *msg;
total_len = sizeof(struct dpvs_msg) + len;
msg = dpvs_mempool_get(msg_pool, total_len);
if (unlikely(NULL == msg))
return NULL;
memset(msg, 0, total_len);
rte_spinlock_init(&msg->lock);
msg->type = type;
msg->seq = seq;
msg->mode = mode;
msg->cid = cid;
msg->len = len;
if (len)
rte_memcpy(msg->data, data, len);
msg->reply.data = NULL;
msg->reply.len = 0;
rte_atomic16_init(&msg->refcnt);
rte_atomic16_inc(&msg->refcnt);
msg_debug_alloc();
msg_debug_dump();
return msg;
}
int msg_destroy(struct dpvs_msg **pmsg)
{
struct dpvs_msg *msg;
if (unlikely(!pmsg || !(*pmsg)))
return EDPVS_INVAL;
msg = *pmsg;
if (unlikely(rte_atomic16_read(&msg->refcnt) == 0)) {
char buf[1024];
msg_dump(msg, buf, sizeof(buf));
RTE_LOG(ERR, MSGMGR, "%s: bad msg refcnt at destroy:\n%s", __func__, buf);
assert(0);
}
if (!rte_atomic16_dec_and_test(&msg->refcnt)) {
*pmsg = NULL;
return EDPVS_OK;
}
/* i'm the only one hold the msg, free it now */
if (msg->mode == DPVS_MSG_MULTICAST) {
struct dpvs_msg *cur, *next;
struct dpvs_multicast_queue *mcq;
assert(rte_lcore_id() == master_lcore);
mcq = mc_queue_get(msg->type, msg->seq);
if (likely(mcq != NULL)) {
list_for_each_entry_safe(cur, next, &mcq->mq, mq_node) {
list_del_init(&cur->mq_node);
add_msg_flags(cur, DPVS_MSG_F_STATE_FIN); /* in case slaves reply with blockable msg */
msg_destroy(&cur);
}
mc_queue_unhash(mcq);
dpvs_mempool_put(msg_pool, mcq);
} else {
RTE_LOG(WARNING, MSGMGR, "%s:msg@%p, deleting multicast msg not found in queue:"
"type=%d, seq=%d\n", __func__, msg, msg->type, msg->seq);
}
}
if (msg->reply.data) {
assert(msg->reply.len != 0);
msg_reply_free(msg->reply.data);
msg->reply.len = 0;
}
dpvs_mempool_put(msg_pool, msg);
*pmsg = NULL;
msg_debug_free();
return EDPVS_OK;
}
static int msg_master_process(int step);
/* "msg" must be produced by "msg_make" */
int msg_send(struct dpvs_msg *msg, lcoreid_t cid, uint32_t flags, struct dpvs_msg_reply **reply)
{
struct dpvs_msg_type *mt;
int res;
int step = 1;
uint32_t tflags;
uint64_t start, delay;
if (unlikely(msg == NULL))
return EDPVS_INVAL;
add_msg_flags(msg, flags);
if (unlikely(!((cid == master_lcore) || (slave_lcore_mask & (1L << cid))))) {
RTE_LOG(WARNING, MSGMGR, "%s:msg@%p, invalid args\n", __func__, msg);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
return EDPVS_INVAL;
}
mt = msg_type_get(msg->type, cid);
if (unlikely(!mt)) {
RTE_LOG(WARNING, MSGMGR, "%s:msg@%p, msg type %d not registered\n",
__func__, msg, msg->type);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
return EDPVS_NOTEXIST;
}
if (mt->prio > g_msg_prio) {
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
msg_type_put(mt);
return EDPVS_DISABLED;
}
msg_type_put(mt);
/* two lcores will be using the msg now, increase its refcnt */
rte_atomic16_inc(&msg->refcnt);
res = rte_ring_enqueue(msg_ring[cid], msg);
if (unlikely(-EDQUOT == res)) {
RTE_LOG(WARNING, MSGMGR, "%s:msg@%p, msg ring of lcore %d quota exceeded\n",
__func__, msg, cid);
} else if (unlikely(-ENOBUFS == res)) {
RTE_LOG(ERR, MSGMGR, "%s:msg@%p, msg ring of lcore %d is full\n", __func__, msg, res);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
rte_atomic16_dec(&msg->refcnt); /* not enqueued, free manually */
return EDPVS_DPDKAPIFAIL;
} else if (res) {
RTE_LOG(ERR, MSGMGR, "%s:msg@%p, unkown error %d for rte_ring_enqueue\n",
__func__, msg, res);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
rte_atomic16_dec(&msg->refcnt); /* not enqueued, free manually */
return EDPVS_DPDKAPIFAIL;
}
if (flags & DPVS_MSG_F_ASYNC)
return EDPVS_OK;
/* blockable msg, wait here until done or timeout */
add_msg_flags(msg, DPVS_MSG_F_STATE_SEND);
start = rte_get_timer_cycles();
delay = (uint64_t)g_msg_timeout * g_cycles_per_sec / 1000000;
while(!(test_msg_flags(msg, (DPVS_MSG_F_STATE_FIN | DPVS_MSG_F_STATE_DROP)))) {
if (start + delay < rte_get_timer_cycles()) {
RTE_LOG(WARNING, MSGMGR, "%s:msg@%p, uc_msg(type:%d, cid:%d->%d, flags=%d) timeout"
"(%d us), drop...\n", __func__, msg, msg->type, msg->cid, cid,
get_msg_flags(msg), g_msg_timeout);
add_msg_flags(msg, DPVS_MSG_F_TIMEOUT);
return EDPVS_MSG_DROP;
}
/* to avoid dead lock when one send a blockable msg to itself */
if (rte_lcore_id() == master_lcore)
msg_master_process(step);
else
msg_slave_process(step);
step *= 2;
}
if (reply)
*reply = &msg->reply;
tflags = get_msg_flags(msg);
if (tflags & DPVS_MSG_F_CALLBACK_FAIL)
return EDPVS_MSG_FAIL;
else if (tflags & DPVS_MSG_F_STATE_FIN)
return EDPVS_OK;
else
return EDPVS_MSG_DROP;
}
/* "msg" must be produced by "msg_make" */
int multicast_msg_send(struct dpvs_msg *msg, uint32_t flags, struct dpvs_multicast_queue **reply)
{
struct dpvs_msg *new_msg;
struct dpvs_multicast_queue *mcq;
uint32_t tflags;
uint64_t start, delay;
int ii, ret;
if (unlikely(msg == NULL))
return EDPVS_INVAL;
add_msg_flags(msg, flags);
if (unlikely(DPVS_MSG_MULTICAST != msg->mode || master_lcore != msg->cid)) {
RTE_LOG(WARNING, MSGMGR, "%s:msg@%p, invalid multicast msg\n", __func__, msg);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
msg->mode = DPVS_MSG_UNICAST; /* do not free msg queue */
return EDPVS_INVAL;
}
/* multicast msg of identical type and seq cannot coexist */
if (unlikely(mc_queue_get(msg->type, msg->seq) != NULL)) {
RTE_LOG(WARNING, MSGMGR, "%s:msg@%p, repeated sequence number for multicast msg: "
"type %d, seq %d\n", __func__, msg, msg->type, msg->seq);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
msg->mode = DPVS_MSG_UNICAST; /* do not free msg queue */
return EDPVS_BUSY;
}
/* send unicast msgs from master to all alive slaves */
rte_atomic16_inc(&msg->refcnt);
for (ii = 0; ii < DPVS_MAX_LCORE; ii++) {
if (slave_lcore_mask & (1UL << ii)) {
new_msg = msg_make(msg->type, msg->seq, DPVS_MSG_UNICAST, msg->cid, msg->len, msg->data);
if (unlikely(!new_msg)) {
RTE_LOG(ERR, MSGMGR, "%s:msg@%p, msg make fail\n", __func__, msg);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
rte_atomic16_dec(&msg->refcnt);
return EDPVS_NOMEM;
}
/* must send F_ASYNC msg as mcq has not allocated */
ret = msg_send(new_msg, ii, DPVS_MSG_F_ASYNC, NULL);
if (ret < 0) { /* nonblock msg not equeued */
if (ret != EDPVS_DISABLED)
RTE_LOG(ERR, MSGMGR, "%s:msg@%p, new_msg@%p, msg send fail\n",
__func__, msg, new_msg);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
rte_atomic16_dec(&msg->refcnt);
msg_destroy(&new_msg);
return ret;
}
msg_destroy(&new_msg);
}
}
mcq = dpvs_mempool_get(msg_pool, sizeof(struct dpvs_multicast_queue));
if (unlikely(!mcq)) {
RTE_LOG(ERR, MSGMGR, "%s:msg@%p, no memory for mcq\n", __func__, msg);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
rte_atomic16_dec(&msg->refcnt);
return EDPVS_NOMEM;
}
mcq->type = msg->type;
mcq->seq = msg->seq;
mcq->mask = slave_lcore_mask;
mcq->org_msg = msg; /* save original msg */
INIT_LIST_HEAD(&mcq->mq);
/* hash mcq so that reply msg can be collected in msg_master_process */
mc_queue_hash(mcq);
if (flags & DPVS_MSG_F_ASYNC)
return EDPVS_OK;
/* blockable msg wait here until done or timeout */
add_msg_flags(msg, DPVS_MSG_F_STATE_SEND);
start = rte_get_timer_cycles();
delay = (uint64_t)g_msg_timeout * g_cycles_per_sec / 1000000;
while(!(test_msg_flags(msg, (DPVS_MSG_F_STATE_FIN | DPVS_MSG_F_STATE_DROP)))) {
if (start + delay < rte_get_timer_cycles()) {
RTE_LOG(WARNING, MSGMGR, "%s:msg@%p, mcq(type:%d, cid:%d->slaves) timeout"
"(%d us), drop...\n", __func__, msg,
msg->type, msg->cid, g_msg_timeout);
add_msg_flags(msg, DPVS_MSG_F_TIMEOUT);
/* just in case slave send reply fail.
* it's safe here, because msg is used on master lcore only. */
msg_destroy(&msg);
return EDPVS_MSG_DROP;
}
msg_master_process(slave_lcore_nb * 1.5); /* to avoid dead lock if send msg to myself */
}
if (reply)
*reply = mcq; /* here, mcq store all slave's reply msg */
tflags = get_msg_flags(msg);
if (tflags & DPVS_MSG_F_CALLBACK_FAIL)
return EDPVS_MSG_FAIL;
else if (tflags & DPVS_MSG_F_STATE_FIN)
return EDPVS_OK;
else
return EDPVS_MSG_DROP;
}
/* both unicast msg and multicast msg can be recieved on master lcore */
static int msg_master_process(int step)
{
int n = 0;
struct dpvs_msg *msg;
struct dpvs_msg_type *msg_type;
struct dpvs_multicast_queue *mcq;
/* dequeue msg from ring on the master lcore and process it */
while (((step <= 0) || ((step > 0) && (++n <= step))) &&
(0 == rte_ring_dequeue(msg_ring[master_lcore], (void **)&msg))) {
add_msg_flags(msg, DPVS_MSG_F_STATE_RECV);
msg_type = msg_type_get(msg->type, master_lcore);
if (!msg_type) {
RTE_LOG(WARNING, MSGMGR, "%s:msg@%p, unregistered msg type %d on master\n",
__func__, msg, msg->type);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
msg_destroy(&msg);
continue;
}
if (DPVS_MSG_UNICAST == msg_type->mode) { /* unicast msg */
if (likely(msg_type->unicast_msg_cb != NULL)) {
if (msg_type->unicast_msg_cb(msg) < 0) {
add_msg_flags(msg, DPVS_MSG_F_CALLBACK_FAIL);
#ifdef CONFIG_MSG_DEBUG
RTE_LOG(INFO, MSGMGR, "%s:msg@%p, uc msg_type %d callback failed on master\n",
__func__, msg, msg->type);
#endif
}
}
add_msg_flags(msg, DPVS_MSG_F_STATE_FIN);
msg_destroy(&msg);
} else { /* multicast msg */
mcq = mc_queue_get(msg->type, msg->seq);
if (!mcq) {
/* probably previous msg timeout */
RTE_LOG(INFO, MSGMGR, "%s:msg@%p, multicast reply msg <type:%d, seq:%d> from"
" lcore %d missed\n", __func__, msg, msg->type, msg->seq, msg->cid);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
msg_destroy(&msg);
msg_type_put(msg_type);
continue;
}
assert(msg_type->multicast_msg_cb != NULL);
if (mcq->mask & (1UL << msg->cid)) { /* you are the msg i'm waiting */
list_add_tail(&msg->mq_node, &mcq->mq);
add_msg_flags(msg, DPVS_MSG_F_STATE_QUEUE);/* set QUEUE flag for slave's reply msg */
mcq->mask &= ~(1UL << msg->cid);
if (test_msg_flags(msg, DPVS_MSG_F_CALLBACK_FAIL)) /* callback on slave failed */
add_msg_flags(mcq->org_msg, DPVS_MSG_F_CALLBACK_FAIL);
if (unlikely(0 == mcq->mask)) { /* okay, all slave reply msg arrived */
if (msg_type->multicast_msg_cb(mcq) < 0) {
add_msg_flags(mcq->org_msg, DPVS_MSG_F_CALLBACK_FAIL);/* callback on master failed */
#ifdef CONFIG_MSG_DEBUG
RTE_LOG(INFO, MSGMGR, "%s:msg@%p, mc msg_type %d callback failed on master\n",
__func__, mcq->org_msg, msg->type);
#endif
}
add_msg_flags(mcq->org_msg, DPVS_MSG_F_STATE_FIN);
msg_destroy(&mcq->org_msg);
}
msg_type_put(msg_type);
continue;
}
/* probably previous msg timeout and new msg of this type sent */
RTE_LOG(INFO, MSGMGR, "%s:msg@%p, multicast reply msg <type:%d, seq:%d> from"
" lcore %d repeated\n", __func__, msg, msg->type, msg->seq, msg->cid);
assert(msg->mode == DPVS_MSG_UNICAST);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
msg_destroy(&msg); /* sorry, you are late */
}
msg_type_put(msg_type);
}
return EDPVS_OK;
}
/* only unicast msg can be recieved on slave lcore */
int msg_slave_process(int step)
{
int n = 0;
struct dpvs_msg *msg, *xmsg;
struct dpvs_msg_type *msg_type;
lcoreid_t cid;
int ret = EDPVS_OK;
cid = rte_lcore_id();
if (unlikely(cid == master_lcore)) {
RTE_LOG(ERR, MSGMGR, "%s is called on master lcore!\n", __func__);
return EDPVS_NONEALCORE;
}
/* dequeue msg from ring on the lcore and process it */
while (0 == rte_ring_dequeue(msg_ring[cid], (void **)&msg)) {
add_msg_flags(msg, DPVS_MSG_F_STATE_RECV);
msg_type = NULL;
if (unlikely(DPVS_MSG_MULTICAST == msg->mode)) {
RTE_LOG(ERR, MSGMGR, "%s:msg@%p, multicast msg recieved on slave lcore!\n",
__func__, msg);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
goto cont;
}
msg_type = msg_type_get(msg->type, cid);
if (!msg_type) {
RTE_LOG(WARNING, MSGMGR, "%s:msg@%p, unregistered msg type %d on lcore %d\n",
__func__, msg, msg->type, cid);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
goto cont;
}
if (likely(msg_type->unicast_msg_cb != NULL)) {
if (msg_type->unicast_msg_cb(msg) < 0) {
add_msg_flags(msg, DPVS_MSG_F_CALLBACK_FAIL);
#ifdef CONFIG_MSG_DEBUG
RTE_LOG(INFO, MSGMGR, "%s:msg@%p, msg_type %d callback failed on lcore %d\n",
__func__, msg, msg->type, cid);
#endif
}
}
/* send reply msg to master for multicast msg */
if (DPVS_MSG_MULTICAST == msg_type->mode) {
/* FIXME:
* What if fail here? The result is master lcore would never get the reply msg from slaves.
* - For blockable msg, no problem exists because the multicast_wait_hlist for it would be freed
* when timeout, making all its repsonse slave msg freed or invalid.
* - Nonblockable msg is difficult to end itself, and all this type msg sending afterwards would fail.
* Fortunately, chances of error happending here is very slim, and nonblockable mulitcast msg is
* rarely used. we just log an error and continue if fail here.
* */
xmsg = msg_make(msg->type, msg->seq, DPVS_MSG_UNICAST, cid, msg->reply.len,
msg->reply.data);
if (unlikely(!xmsg)) {
RTE_LOG(ERR, MSGMGR, "%s:msg@%p, no memory for msg_make\n", __func__, msg);
ret = EDPVS_NOMEM;
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
goto cont;
}
add_msg_flags(xmsg, DPVS_MSG_F_CALLBACK_FAIL & get_msg_flags(msg));
if (msg_send(xmsg, master_lcore, DPVS_MSG_F_ASYNC, NULL)) {
RTE_LOG(ERR, MSGMGR, "%s:msg@%p,xmsg@%p, xmsg send failed!\n",
__func__, msg, xmsg);
add_msg_flags(msg, DPVS_MSG_F_STATE_DROP);
msg_destroy(&xmsg);
goto cont;
}
msg_destroy(&xmsg);
}
add_msg_flags(msg, DPVS_MSG_F_STATE_FIN);
cont:
if (likely(msg_type != NULL))
msg_type_put(msg_type);
msg_destroy(&msg);
if (step > 0 && ++n >= step)
break;
}
return ret;
}
/* for debug */
int msg_dump(const struct dpvs_msg *msg, char *buf, int len)
{
int curlen;
char mstats[256];
if (!msg || !buf || !len)
return 0;
memset(buf, 0, len);
snprintf(buf, len, " ptr:%p, type:%d, seq:%d, mode:%d, cid:%d, flags:0x%x, refcnt:%d\n ",
msg, msg->type, msg->seq, msg->mode, msg->cid, msg->flags, rte_atomic16_read(&msg->refcnt));
if (msg->len) {
curlen = strlen(buf);
if (len - curlen <= 0)
return strlen(buf);
snprintf(buf + curlen, len - curlen, "len:%d, data:0x%lx\n ", msg->len, (uint64_t)msg->data);
}
if (msg->reply.len) {
curlen = strlen(buf);
if (len - curlen <= 0)
return strlen(buf);
snprintf(buf + curlen, len - curlen, "reply.len:%d, reply.data:0x%lx\n ",
msg->reply.len, (uint64_t)msg->reply.data);
}
if (msg_memory_stats(mstats, sizeof(mstats))) {
curlen = strlen(buf);
if (len - curlen <= 0)
return strlen(buf);
snprintf(buf + curlen, len - curlen, "%s\n ", mstats);
}
return strlen(buf);
}
int msg_type_table_print(char *buf, int len)
{
char line[256];
int ii, jj, rem_len;
struct dpvs_msg_type *mt;
if (!buf || !len)
return EDPVS_INVAL;
memset(buf, 0, len);
for (ii = 0; ii < DPVS_MAX_LCORE; ii++) {
if (ii != master_lcore && !(slave_lcore_mask & (1L << ii)))
continue;
for (jj = 0; jj < DPVS_MT_LEN; jj++) {
rte_rwlock_read_lock(&mt_lock[ii][jj]);
list_for_each_entry(mt, &mt_array[ii][jj], list) {
memset(line, 0, sizeof(line));
snprintf(line, sizeof(line), "mt_array[%-2d][%-4d] type %-8d mode %-12s"
" unicast_cb %p multicast_cb %p\n", ii, jj, mt->type,
mt->mode == DPVS_MSG_UNICAST ? "UNICAST" : "MULITICAST",
mt->unicast_msg_cb, mt->multicast_msg_cb);
rem_len = len - strlen(buf) - 1;
if (strlen(line) > rem_len) {
RTE_LOG(WARNING, MSGMGR, "%s: buffer not enough\n", __func__);
return EDPVS_INVAL;
}
strncat(buf, line, rem_len);
}
rte_rwlock_read_unlock(&mt_lock[ii][jj]);
}
}
return EDPVS_OK;
}
/**************************** built-in msg *******************************/
static int msg_type_reg_cb(struct dpvs_msg *msg)
{
int ret;
struct dpvs_msg_type *mt;
if (unlikely(NULL == msg || sizeof(struct dpvs_msg_type) != msg->len)) {
RTE_LOG(WARNING, MSGMGR, "%s: bad msg data for MSG_TYPE_REG\n", __func__);
return EDPVS_INVAL;
}
mt = (struct dpvs_msg_type *)msg->data;
ret = msg_type_register(mt);
if (ret < 0) {
RTE_LOG(WARNING, MSGMGR, "%s: fail to request to register new msg type\n", __func__);
return ret;
}
return EDPVS_OK;
}
static int msg_type_unreg_cb(struct dpvs_msg *msg)
{
int ret;
struct dpvs_msg_type *mt;
if (unlikely(NULL == msg || sizeof(struct dpvs_msg_type) != msg->len)) {
RTE_LOG(WARNING, MSGMGR, "%s: bad msg data for MSG_TYPE_UNREG\n", __func__);
return EDPVS_INVAL;
}
mt = (struct dpvs_msg_type *)msg->data;
ret = msg_type_unregister(mt);
if (ret < 0) {
RTE_LOG(WARNING, MSGMGR, "%s: fail to request to unregister new msg type\n", __func__);
return ret;
}
return EDPVS_OK;
}
static int register_built_in_msg(void)
{
int ii, tret, ret = EDPVS_OK;
struct dpvs_msg_type mt;
/* register msg-type on all enabled lcores */
memset(&mt, 0, sizeof(mt));
mt.type = MSG_TYPE_REG;
mt.mode = DPVS_MSG_UNICAST;
mt.prio = MSG_PRIO_HIGH;
mt.unicast_msg_cb = msg_type_reg_cb;
for (ii = 0; ii < DPVS_MAX_LCORE; ii++) {
if ((ii != master_lcore) && !(slave_lcore_mask & (1UL<<ii)))
continue;
mt.cid = ii;
if (unlikely((tret = msg_type_register(&mt)) < 0 )) {
RTE_LOG(WARNING, MSGMGR, "%s: fail to register msg-register msg\n", __func__);
ret = tret;
}
}
/* unregister msg-type on all enabled lcores */
memset(&mt, 0, sizeof(mt));
mt.type = MSG_TYPE_UNREG;
mt.mode = DPVS_MSG_UNICAST;
mt.prio = MSG_PRIO_HIGH;
mt.unicast_msg_cb = msg_type_unreg_cb;
for (ii = 0; ii < DPVS_MAX_LCORE; ii++) {
if ((ii != master_lcore) && !(slave_lcore_mask & (1UL<<ii)))
continue;
mt.cid = ii;
if (unlikely((tret = msg_type_register(&mt)))) {
RTE_LOG(WARNING, MSGMGR, "%s: fail to register msg-unregister mgs\n", __func__);
ret = tret;
}
}
/* master_xmit_msg msg-type on all slave lcores */
if (unlikely(tret = netif_register_master_xmit_msg()))
ret = tret;
return ret;
}
static int unregister_built_in_msg(void)
{
int ii, tret, ret = EDPVS_OK;
struct dpvs_msg_type mt;
/* msg register msg-type */
mt.type = MSG_TYPE_REG;
mt.mode = DPVS_MSG_UNICAST;
mt.prio = MSG_PRIO_HIGH;
mt.unicast_msg_cb = msg_type_reg_cb;
for (ii = 0; ii < DPVS_MAX_LCORE; ii++) {
if ((ii != master_lcore) && !(slave_lcore_mask & (1UL<<ii)))
continue;
mt.cid = ii;
if (unlikely((tret = msg_type_unregister(&mt)) < 0)) {
RTE_LOG(WARNING, MSGMGR, "%s: fail to unregister msg-register msg\n", __func__);
ret = tret;
}
}
/* msg unregister msg-type */
memset(&mt, 0, sizeof(mt));
mt.type = MSG_TYPE_UNREG;
mt.mode = DPVS_MSG_UNICAST;
mt.prio = MSG_PRIO_HIGH;
mt.unicast_msg_cb = msg_type_unreg_cb;
for (ii = 0; ii < DPVS_MAX_LCORE; ii++) {
if ((ii != master_lcore) && !(slave_lcore_mask & (1UL<<ii)))
continue;
mt.cid = ii;
if (unlikely((tret = msg_type_unregister(&mt)) < 0)) {
RTE_LOG(WARNING, MSGMGR, "%s: fail to unregister msg-register msg\n", __func__);
ret = tret;
}
}
return ret;
}
static inline void master_lcore_loop_func(__rte_unused void *dummy)