37e3a6d349
This commit, long overdue, contains contributions in the last 2 years from Stefano Garzarella, Giuseppe Lettieri, Vincenzo Maffione, including: + fixes on monitor ports + the 'ptnet' virtual device driver, and ptnetmap backend, for high speed virtual passthrough on VMs (bhyve fixes in an upcoming commit) + improved emulated netmap mode + more robust error handling + removal of stale code + various fixes to code and documentation (some mixup between RX and TX parameters, and private and public variables) We also include an additional tool, nmreplay, which is functionally equivalent to tcpreplay but operating on netmap ports.
167 lines
3.3 KiB
C
167 lines
3.3 KiB
C
/*
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* Copyright (C) 2013-2014 Vincenzo Maffione
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* $FreeBSD$
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*/
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#ifdef linux
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#include "bsd_glue.h"
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#elif defined (_WIN32)
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#include "win_glue.h"
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#else /* __FreeBSD__ */
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#endif /* __FreeBSD__ */
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#include "netmap_mbq.h"
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static inline void __mbq_init(struct mbq *q)
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{
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q->head = q->tail = NULL;
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q->count = 0;
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}
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void mbq_safe_init(struct mbq *q)
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{
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mtx_init(&q->lock, "mbq", NULL, MTX_SPIN);
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__mbq_init(q);
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}
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void mbq_init(struct mbq *q)
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{
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__mbq_init(q);
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}
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static inline void __mbq_enqueue(struct mbq *q, struct mbuf *m)
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{
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m->m_nextpkt = NULL;
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if (q->tail) {
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q->tail->m_nextpkt = m;
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q->tail = m;
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} else {
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q->head = q->tail = m;
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}
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q->count++;
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}
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void mbq_safe_enqueue(struct mbq *q, struct mbuf *m)
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{
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mbq_lock(q);
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__mbq_enqueue(q, m);
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mbq_unlock(q);
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}
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void mbq_enqueue(struct mbq *q, struct mbuf *m)
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{
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__mbq_enqueue(q, m);
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}
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static inline struct mbuf *__mbq_dequeue(struct mbq *q)
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{
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struct mbuf *ret = NULL;
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if (q->head) {
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ret = q->head;
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q->head = ret->m_nextpkt;
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if (q->head == NULL) {
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q->tail = NULL;
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}
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q->count--;
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ret->m_nextpkt = NULL;
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}
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return ret;
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}
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struct mbuf *mbq_safe_dequeue(struct mbq *q)
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{
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struct mbuf *ret;
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mbq_lock(q);
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ret = __mbq_dequeue(q);
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mbq_unlock(q);
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return ret;
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}
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struct mbuf *mbq_dequeue(struct mbq *q)
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{
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return __mbq_dequeue(q);
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}
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/* XXX seems pointless to have a generic purge */
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static void __mbq_purge(struct mbq *q, int safe)
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{
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struct mbuf *m;
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for (;;) {
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m = safe ? mbq_safe_dequeue(q) : mbq_dequeue(q);
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if (m) {
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m_freem(m);
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} else {
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break;
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}
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}
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}
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void mbq_purge(struct mbq *q)
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{
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__mbq_purge(q, 0);
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}
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void mbq_safe_purge(struct mbq *q)
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{
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__mbq_purge(q, 1);
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}
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void mbq_safe_fini(struct mbq *q)
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{
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mtx_destroy(&q->lock);
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}
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void mbq_fini(struct mbq *q)
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{
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}
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