171 lines
4.2 KiB
C
171 lines
4.2 KiB
C
/*
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* Copyright (C) 2018 Giuseppe Lettieri
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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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#if defined(__FreeBSD__)
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#include <sys/cdefs.h> /* prerequisite */
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#include <sys/types.h>
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#include <sys/errno.h>
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#include <sys/param.h> /* defines used in kernel.h */
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#include <sys/kernel.h> /* types used in module initialization */
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#include <sys/malloc.h>
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#include <sys/poll.h>
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#include <sys/lock.h>
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#include <sys/rwlock.h>
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#include <sys/selinfo.h>
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#include <sys/sysctl.h>
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#include <sys/socket.h> /* sockaddrs */
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#include <net/if.h>
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#include <net/if_var.h>
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#include <machine/bus.h> /* bus_dmamap_* */
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#include <sys/refcount.h>
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#elif defined(linux)
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#include "bsd_glue.h"
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#elif defined(__APPLE__)
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#warning OSX support is only partial
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#include "osx_glue.h"
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#elif defined(_WIN32)
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#include "win_glue.h"
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#else
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#error Unsupported platform
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#endif /* unsupported */
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/*
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* common headers
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*/
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#include <net/netmap.h>
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#include <dev/netmap/netmap_kern.h>
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#include <dev/netmap/netmap_mem2.h>
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#ifdef WITH_NMNULL
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static int
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netmap_null_sync(struct netmap_kring *kring, int flags)
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{
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(void)kring;
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(void)flags;
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return 0;
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}
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static int
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netmap_null_krings_create(struct netmap_adapter *na)
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{
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return netmap_krings_create(na, 0);
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}
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static int
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netmap_null_reg(struct netmap_adapter *na, int onoff)
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{
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if (na->active_fds == 0) {
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if (onoff)
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na->na_flags |= NAF_NETMAP_ON;
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else
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na->na_flags &= ~NAF_NETMAP_ON;
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}
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return 0;
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}
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static int
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netmap_null_bdg_attach(const char *name, struct netmap_adapter *na,
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struct nm_bridge *b)
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{
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(void)name;
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(void)na;
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(void)b;
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return EINVAL;
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}
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int
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netmap_get_null_na(struct nmreq_header *hdr, struct netmap_adapter **na,
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struct netmap_mem_d *nmd, int create)
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{
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struct nmreq_register *req = (struct nmreq_register *)(uintptr_t)hdr->nr_body;
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struct netmap_null_adapter *nna;
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int error;
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if (req->nr_mode != NR_REG_NULL) {
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nm_prdis("not a null port");
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return 0;
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}
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if (!create) {
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nm_prerr("null ports cannot be re-opened");
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return EINVAL;
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}
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if (nmd == NULL) {
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nm_prerr("null ports must use an existing allocator");
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return EINVAL;
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}
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nna = nm_os_malloc(sizeof(*nna));
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if (nna == NULL) {
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error = ENOMEM;
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goto err;
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}
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snprintf(nna->up.name, sizeof(nna->up.name), "null:%s", hdr->nr_name);
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nna->up.nm_txsync = netmap_null_sync;
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nna->up.nm_rxsync = netmap_null_sync;
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nna->up.nm_register = netmap_null_reg;
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nna->up.nm_krings_create = netmap_null_krings_create;
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nna->up.nm_krings_delete = netmap_krings_delete;
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nna->up.nm_bdg_attach = netmap_null_bdg_attach;
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nna->up.nm_mem = netmap_mem_get(nmd);
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nna->up.num_tx_rings = req->nr_tx_rings;
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nna->up.num_rx_rings = req->nr_rx_rings;
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nna->up.num_tx_desc = req->nr_tx_slots;
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nna->up.num_rx_desc = req->nr_rx_slots;
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nna->up.na_flags = NAF_OFFSETS;
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error = netmap_attach_common(&nna->up);
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if (error)
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goto free_nna;
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*na = &nna->up;
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netmap_adapter_get(*na);
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nm_prdis("created null %s", nna->up.name);
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return 0;
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free_nna:
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nm_os_free(nna);
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err:
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return error;
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}
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#endif /* WITH_NMNULL */
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