diff options
Diffstat (limited to 'freebsd/sys/netinet/tcp_offload.c')
| -rw-r--r-- | freebsd/sys/netinet/tcp_offload.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/freebsd/sys/netinet/tcp_offload.c b/freebsd/sys/netinet/tcp_offload.c new file mode 100644 index 00000000..9c73992b --- /dev/null +++ b/freebsd/sys/netinet/tcp_offload.c @@ -0,0 +1,147 @@ +#include <freebsd/machine/rtems-bsd-config.h> + +/*- + * Copyright (c) 2007, Chelsio Inc. + * 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. Neither the name of the Chelsio Corporation nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. + */ + +#include <freebsd/sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <freebsd/sys/param.h> +#include <freebsd/sys/systm.h> +#include <freebsd/sys/types.h> +#include <freebsd/sys/malloc.h> +#include <freebsd/sys/kernel.h> +#include <freebsd/sys/sysctl.h> +#include <freebsd/sys/mbuf.h> +#include <freebsd/sys/socket.h> +#include <freebsd/sys/socketvar.h> + +#include <freebsd/net/if.h> +#include <freebsd/net/if_types.h> +#include <freebsd/net/if_var.h> +#include <freebsd/net/route.h> +#include <freebsd/net/vnet.h> + +#include <freebsd/netinet/in.h> +#include <freebsd/netinet/in_systm.h> +#include <freebsd/netinet/in_pcb.h> +#include <freebsd/netinet/tcp.h> +#include <freebsd/netinet/tcp_var.h> +#include <freebsd/netinet/tcp_offload.h> +#include <freebsd/netinet/toedev.h> + +uint32_t toedev_registration_count; + +int +tcp_offload_connect(struct socket *so, struct sockaddr *nam) +{ + struct ifnet *ifp; + struct toedev *tdev; + struct rtentry *rt; + int error; + + if (toedev_registration_count == 0) + return (EINVAL); + + /* + * Look up the route used for the connection to + * determine if it uses an interface capable of + * offloading the connection. + */ + rt = rtalloc1(nam, 0 /*report*/, 0 /*ignflags*/); + if (rt) + RT_UNLOCK(rt); + else + return (EHOSTUNREACH); + + ifp = rt->rt_ifp; + if ((ifp->if_capenable & IFCAP_TOE) == 0) { + error = EINVAL; + goto fail; + } + + tdev = TOEDEV(ifp); + if (tdev == NULL) { + error = EPERM; + goto fail; + } + + if (tdev->tod_can_offload(tdev, so) == 0) { + error = EPERM; + goto fail; + } + + return (tdev->tod_connect(tdev, so, rt, nam)); +fail: + RTFREE(rt); + return (error); +} + + +/* + * This file contains code as a short-term staging area before it is moved in + * to sys/netinet/tcp_offload.c + */ + +void +tcp_offload_twstart(struct tcpcb *tp) +{ + + INP_INFO_WLOCK(&V_tcbinfo); + INP_WLOCK(tp->t_inpcb); + tcp_twstart(tp); + INP_INFO_WUNLOCK(&V_tcbinfo); +} + +struct tcpcb * +tcp_offload_close(struct tcpcb *tp) +{ + + INP_INFO_WLOCK(&V_tcbinfo); + INP_WLOCK(tp->t_inpcb); + tp = tcp_close(tp); + INP_INFO_WUNLOCK(&V_tcbinfo); + if (tp) + INP_WUNLOCK(tp->t_inpcb); + + return (tp); +} + +struct tcpcb * +tcp_offload_drop(struct tcpcb *tp, int error) +{ + + INP_INFO_WLOCK(&V_tcbinfo); + INP_WLOCK(tp->t_inpcb); + tp = tcp_drop(tp, error); + INP_INFO_WUNLOCK(&V_tcbinfo); + if (tp) + INP_WUNLOCK(tp->t_inpcb); + + return (tp); +} + |