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/*
* Copyright (C) 2018 Giuseppe Lettieri
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(__FreeBSD__)
#include <sys/cdefs.h> /* prerequisite */
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/param.h> /* defines used in kernel.h */
#include <sys/kernel.h> /* types used in module initialization */
#include <sys/malloc.h>
#include <sys/poll.h>
#include <sys/lock.h>
#include <sys/rwlock.h>
#include <sys/selinfo.h>
#include <sys/sysctl.h>
#include <sys/socket.h> /* sockaddrs */
#include <net/if.h>
#include <net/if_var.h>
#include <machine/bus.h> /* bus_dmamap_* */
#include <sys/refcount.h>
#elif defined(linux)
#include "bsd_glue.h"
#elif defined(__APPLE__)
#warning OSX support is only partial
#include "osx_glue.h"
#elif defined(_WIN32)
#include "win_glue.h"
#else
#error Unsupported platform
#endif /* unsupported */
/*
* common headers
*/
#include <net/netmap.h>
#include <dev/netmap/netmap_kern.h>
#include <dev/netmap/netmap_mem2.h>
#ifdef WITH_NMNULL
static int
netmap_null_sync(struct netmap_kring *kring, int flags)
{
(void)kring;
(void)flags;
return 0;
}
static int
netmap_null_krings_create(struct netmap_adapter *na)
{
return netmap_krings_create(na, 0);
}
static int
netmap_null_reg(struct netmap_adapter *na, int onoff)
{
if (na->active_fds == 0) {
if (onoff)
na->na_flags |= NAF_NETMAP_ON;
else
na->na_flags &= ~NAF_NETMAP_ON;
}
return 0;
}
static int
netmap_null_bdg_attach(const char *name, struct netmap_adapter *na,
struct nm_bridge *b)
{
(void)name;
(void)na;
(void)b;
return EINVAL;
}
int
netmap_get_null_na(struct nmreq_header *hdr, struct netmap_adapter **na,
struct netmap_mem_d *nmd, int create)
{
struct nmreq_register *req = (struct nmreq_register *)(uintptr_t)hdr->nr_body;
struct netmap_null_adapter *nna;
int error;
if (req->nr_mode != NR_REG_NULL) {
nm_prdis("not a null port");
return 0;
}
if (!create) {
nm_prerr("null ports cannot be re-opened");
return EINVAL;
}
if (nmd == NULL) {
nm_prerr("null ports must use an existing allocator");
return EINVAL;
}
nna = nm_os_malloc(sizeof(*nna));
if (nna == NULL) {
error = ENOMEM;
goto err;
}
snprintf(nna->up.name, sizeof(nna->up.name), "null:%s", hdr->nr_name);
nna->up.nm_txsync = netmap_null_sync;
nna->up.nm_rxsync = netmap_null_sync;
nna->up.nm_register = netmap_null_reg;
nna->up.nm_krings_create = netmap_null_krings_create;
nna->up.nm_krings_delete = netmap_krings_delete;
nna->up.nm_bdg_attach = netmap_null_bdg_attach;
nna->up.nm_mem = netmap_mem_get(nmd);
nna->up.num_tx_rings = req->nr_tx_rings;
nna->up.num_rx_rings = req->nr_rx_rings;
nna->up.num_tx_desc = req->nr_tx_slots;
nna->up.num_rx_desc = req->nr_rx_slots;
error = netmap_attach_common(&nna->up);
if (error)
goto free_nna;
*na = &nna->up;
netmap_adapter_get(*na);
nm_prdis("created null %s", nna->up.name);
return 0;
free_nna:
nm_os_free(nna);
err:
return error;
}
#endif /* WITH_NMNULL */
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