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freebsd-dev/sys/dev/cxgbe/tom/t4_listen.c
Alexander V. Chernikov b158cfb3fc Switch cxgbe interface lookup to use fibX_lookup() from older 
fibX_lookup_nh_ext().

fibX_lookup_nh_ represents pre-epoch generation of fib kpi,
providing less guarantees over pointer validness and requiring
on-stack data copying.

Reviewed by:	np
Differential Revision:	https://reviews.freebsd.org/D24975
2020-06-22 07:35:23 +00:00

1539 lines
41 KiB
C
Raw Blame History

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012 Chelsio Communications, Inc.
* All rights reserved.
* Written by: Navdeep Parhar <np@FreeBSD.org>
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#ifdef TCP_OFFLOAD
#include <sys/param.h>
#include <sys/types.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/module.h>
#include <sys/protosw.h>
#include <sys/refcount.h>
#include <sys/domain.h>
#include <sys/fnv_hash.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#include <net/route.h>
#include <net/route/nhop.h>
#include <netinet/in.h>
#include <netinet/in_fib.h>
#include <netinet/in_pcb.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet6/in6_fib.h>
#include <netinet6/scope6_var.h>
#include <netinet/tcp_timer.h>
#define TCPSTATES
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_var.h>
#include <netinet/toecore.h>
#include <netinet/cc/cc.h>
#include "common/common.h"
#include "common/t4_msg.h"
#include "common/t4_regs.h"
#include "t4_clip.h"
#include "tom/t4_tom_l2t.h"
#include "tom/t4_tom.h"
/* stid services */
static int alloc_stid(struct adapter *, struct listen_ctx *, int);
static struct listen_ctx *lookup_stid(struct adapter *, int);
static void free_stid(struct adapter *, struct listen_ctx *);
/* lctx services */
static struct listen_ctx *alloc_lctx(struct adapter *, struct inpcb *,
struct vi_info *);
static int free_lctx(struct adapter *, struct listen_ctx *);
static void hold_lctx(struct listen_ctx *);
static void listen_hash_add(struct adapter *, struct listen_ctx *);
static struct listen_ctx *listen_hash_find(struct adapter *, struct inpcb *);
static struct listen_ctx *listen_hash_del(struct adapter *, struct inpcb *);
static struct inpcb *release_lctx(struct adapter *, struct listen_ctx *);
static void send_reset_synqe(struct toedev *, struct synq_entry *);
static int
alloc_stid(struct adapter *sc, struct listen_ctx *lctx, int isipv6)
{
struct tid_info *t = &sc->tids;
u_int stid, n, f, mask;
struct stid_region *sr = &lctx->stid_region;
/*
* An IPv6 server needs 2 naturally aligned stids (1 stid = 4 cells) in
* the TCAM. The start of the stid region is properly aligned (the chip
* requires each region to be 128-cell aligned).
*/
n = isipv6 ? 2 : 1;
mask = n - 1;
KASSERT((t->stid_base & mask) == 0 && (t->nstids & mask) == 0,
("%s: stid region (%u, %u) not properly aligned. n = %u",
__func__, t->stid_base, t->nstids, n));
mtx_lock(&t->stid_lock);
if (n > t->nstids - t->stids_in_use) {
mtx_unlock(&t->stid_lock);
return (-1);
}
if (t->nstids_free_head >= n) {
/*
* This allocation will definitely succeed because the region
* starts at a good alignment and we just checked we have enough
* stids free.
*/
f = t->nstids_free_head & mask;
t->nstids_free_head -= n + f;
stid = t->nstids_free_head;
TAILQ_INSERT_HEAD(&t->stids, sr, link);
} else {
struct stid_region *s;
stid = t->nstids_free_head;
TAILQ_FOREACH(s, &t->stids, link) {
stid += s->used + s->free;
f = stid & mask;
if (s->free >= n + f) {
stid -= n + f;
s->free -= n + f;
TAILQ_INSERT_AFTER(&t->stids, s, sr, link);
goto allocated;
}
}
if (__predict_false(stid != t->nstids)) {
panic("%s: stids TAILQ (%p) corrupt."
" At %d instead of %d at the end of the queue.",
__func__, &t->stids, stid, t->nstids);
}
mtx_unlock(&t->stid_lock);
return (-1);
}
allocated:
sr->used = n;
sr->free = f;
t->stids_in_use += n;
t->stid_tab[stid] = lctx;
mtx_unlock(&t->stid_lock);
KASSERT(((stid + t->stid_base) & mask) == 0,
("%s: EDOOFUS.", __func__));
return (stid + t->stid_base);
}
static struct listen_ctx *
lookup_stid(struct adapter *sc, int stid)
{
struct tid_info *t = &sc->tids;
return (t->stid_tab[stid - t->stid_base]);
}
static void
free_stid(struct adapter *sc, struct listen_ctx *lctx)
{
struct tid_info *t = &sc->tids;
struct stid_region *sr = &lctx->stid_region;
struct stid_region *s;
KASSERT(sr->used > 0, ("%s: nonsense free (%d)", __func__, sr->used));
mtx_lock(&t->stid_lock);
s = TAILQ_PREV(sr, stid_head, link);
if (s != NULL)
s->free += sr->used + sr->free;
else
t->nstids_free_head += sr->used + sr->free;
KASSERT(t->stids_in_use >= sr->used,
("%s: stids_in_use (%u) < stids being freed (%u)", __func__,
t->stids_in_use, sr->used));
t->stids_in_use -= sr->used;
TAILQ_REMOVE(&t->stids, sr, link);
mtx_unlock(&t->stid_lock);
}
static struct listen_ctx *
alloc_lctx(struct adapter *sc, struct inpcb *inp, struct vi_info *vi)
{
struct listen_ctx *lctx;
INP_WLOCK_ASSERT(inp);
lctx = malloc(sizeof(struct listen_ctx), M_CXGBE, M_NOWAIT | M_ZERO);
if (lctx == NULL)
return (NULL);
lctx->stid = alloc_stid(sc, lctx, inp->inp_vflag & INP_IPV6);
if (lctx->stid < 0) {
free(lctx, M_CXGBE);
return (NULL);
}
if (inp->inp_vflag & INP_IPV6 &&
!IN6_ARE_ADDR_EQUAL(&in6addr_any, &inp->in6p_laddr)) {
lctx->ce = t4_hold_lip(sc, &inp->in6p_laddr, NULL);
if (lctx->ce == NULL) {
free(lctx, M_CXGBE);
return (NULL);
}
}
lctx->ctrlq = &sc->sge.ctrlq[vi->pi->port_id];
lctx->ofld_rxq = &sc->sge.ofld_rxq[vi->first_ofld_rxq];
refcount_init(&lctx->refcount, 1);
lctx->inp = inp;
lctx->vnet = inp->inp_socket->so_vnet;
in_pcbref(inp);
return (lctx);
}
/* Don't call this directly, use release_lctx instead */
static int
free_lctx(struct adapter *sc, struct listen_ctx *lctx)
{
struct inpcb *inp = lctx->inp;
INP_WLOCK_ASSERT(inp);
KASSERT(lctx->refcount == 0,
("%s: refcount %d", __func__, lctx->refcount));
KASSERT(lctx->stid >= 0, ("%s: bad stid %d.", __func__, lctx->stid));
CTR4(KTR_CXGBE, "%s: stid %u, lctx %p, inp %p",
__func__, lctx->stid, lctx, lctx->inp);
if (lctx->ce)
t4_release_lip(sc, lctx->ce);
free_stid(sc, lctx);
free(lctx, M_CXGBE);
return (in_pcbrele_wlocked(inp));
}
static void
hold_lctx(struct listen_ctx *lctx)
{
refcount_acquire(&lctx->refcount);
}
static inline uint32_t
listen_hashfn(void *key, u_long mask)
{
return (fnv_32_buf(&key, sizeof(key), FNV1_32_INIT) & mask);
}
/*
* Add a listen_ctx entry to the listen hash table.
*/
static void
listen_hash_add(struct adapter *sc, struct listen_ctx *lctx)
{
struct tom_data *td = sc->tom_softc;
int bucket = listen_hashfn(lctx->inp, td->listen_mask);
mtx_lock(&td->lctx_hash_lock);
LIST_INSERT_HEAD(&td->listen_hash[bucket], lctx, link);
td->lctx_count++;
mtx_unlock(&td->lctx_hash_lock);
}
/*
* Look for the listening socket's context entry in the hash and return it.
*/
static struct listen_ctx *
listen_hash_find(struct adapter *sc, struct inpcb *inp)
{
struct tom_data *td = sc->tom_softc;
int bucket = listen_hashfn(inp, td->listen_mask);
struct listen_ctx *lctx;
mtx_lock(&td->lctx_hash_lock);
LIST_FOREACH(lctx, &td->listen_hash[bucket], link) {
if (lctx->inp == inp)
break;
}
mtx_unlock(&td->lctx_hash_lock);
return (lctx);
}
/*
* Removes the listen_ctx structure for inp from the hash and returns it.
*/
static struct listen_ctx *
listen_hash_del(struct adapter *sc, struct inpcb *inp)
{
struct tom_data *td = sc->tom_softc;
int bucket = listen_hashfn(inp, td->listen_mask);
struct listen_ctx *lctx, *l;
mtx_lock(&td->lctx_hash_lock);
LIST_FOREACH_SAFE(lctx, &td->listen_hash[bucket], link, l) {
if (lctx->inp == inp) {
LIST_REMOVE(lctx, link);
td->lctx_count--;
break;
}
}
mtx_unlock(&td->lctx_hash_lock);
return (lctx);
}
/*
* Releases a hold on the lctx. Must be called with the listening socket's inp
* locked. The inp may be freed by this function and it returns NULL to
* indicate this.
*/
static struct inpcb *
release_lctx(struct adapter *sc, struct listen_ctx *lctx)
{
struct inpcb *inp = lctx->inp;
int inp_freed = 0;
INP_WLOCK_ASSERT(inp);
if (refcount_release(&lctx->refcount))
inp_freed = free_lctx(sc, lctx);
return (inp_freed ? NULL : inp);
}
static void
send_reset_synqe(struct toedev *tod, struct synq_entry *synqe)
{
struct adapter *sc = tod->tod_softc;
struct mbuf *m = synqe->syn;
struct ifnet *ifp = m->m_pkthdr.rcvif;
struct vi_info *vi = ifp->if_softc;
struct port_info *pi = vi->pi;
struct l2t_entry *e = &sc->l2t->l2tab[synqe->params.l2t_idx];
struct wrqe *wr;
struct fw_flowc_wr *flowc;
struct cpl_abort_req *req;
int flowclen;
struct sge_wrq *ofld_txq;
struct sge_ofld_rxq *ofld_rxq;
const int nparams = 6;
const u_int pfvf = sc->pf << S_FW_VIID_PFN;
INP_WLOCK_ASSERT(synqe->lctx->inp);
CTR5(KTR_CXGBE, "%s: synqe %p (0x%x), tid %d%s",
__func__, synqe, synqe->flags, synqe->tid,
synqe->flags & TPF_ABORT_SHUTDOWN ?
" (abort already in progress)" : "");
if (synqe->flags & TPF_ABORT_SHUTDOWN)
return; /* abort already in progress */
synqe->flags |= TPF_ABORT_SHUTDOWN;
ofld_txq = &sc->sge.ofld_txq[synqe->params.txq_idx];
ofld_rxq = &sc->sge.ofld_rxq[synqe->params.rxq_idx];
/* The wrqe will have two WRs - a flowc followed by an abort_req */
flowclen = sizeof(*flowc) + nparams * sizeof(struct fw_flowc_mnemval);
wr = alloc_wrqe(roundup2(flowclen, EQ_ESIZE) + sizeof(*req), ofld_txq);
if (wr == NULL) {
/* XXX */
panic("%s: allocation failure.", __func__);
}
flowc = wrtod(wr);
req = (void *)((caddr_t)flowc + roundup2(flowclen, EQ_ESIZE));
/* First the flowc ... */
memset(flowc, 0, wr->wr_len);
flowc->op_to_nparams = htobe32(V_FW_WR_OP(FW_FLOWC_WR) |
V_FW_FLOWC_WR_NPARAMS(nparams));
flowc->flowid_len16 = htonl(V_FW_WR_LEN16(howmany(flowclen, 16)) |
V_FW_WR_FLOWID(synqe->tid));
flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
flowc->mnemval[0].val = htobe32(pfvf);
flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
flowc->mnemval[1].val = htobe32(pi->tx_chan);
flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
flowc->mnemval[2].val = htobe32(pi->tx_chan);
flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
flowc->mnemval[3].val = htobe32(ofld_rxq->iq.abs_id);
flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_SNDBUF;
flowc->mnemval[4].val = htobe32(512);
flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_MSS;
flowc->mnemval[5].val = htobe32(512);
synqe->flags |= TPF_FLOWC_WR_SENT;
/* ... then ABORT request */
INIT_TP_WR_MIT_CPL(req, CPL_ABORT_REQ, synqe->tid);
req->rsvd0 = 0; /* don't have a snd_nxt */
req->rsvd1 = 1; /* no data sent yet */
req->cmd = CPL_ABORT_SEND_RST;
t4_l2t_send(sc, wr, e);
}
static int
create_server(struct adapter *sc, struct listen_ctx *lctx)
{
struct wrqe *wr;
struct cpl_pass_open_req *req;
struct inpcb *inp = lctx->inp;
wr = alloc_wrqe(sizeof(*req), lctx->ctrlq);
if (wr == NULL) {
log(LOG_ERR, "%s: allocation failure", __func__);
return (ENOMEM);
}
req = wrtod(wr);
INIT_TP_WR(req, 0);
OPCODE_TID(req) = htobe32(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, lctx->stid));
req->local_port = inp->inp_lport;
req->peer_port = 0;
req->local_ip = inp->inp_laddr.s_addr;
req->peer_ip = 0;
req->opt0 = htobe64(V_TX_CHAN(lctx->ctrlq->eq.tx_chan));
req->opt1 = htobe64(V_CONN_POLICY(CPL_CONN_POLICY_ASK) |
F_SYN_RSS_ENABLE | V_SYN_RSS_QUEUE(lctx->ofld_rxq->iq.abs_id));
t4_wrq_tx(sc, wr);
return (0);
}
static int
create_server6(struct adapter *sc, struct listen_ctx *lctx)
{
struct wrqe *wr;
struct cpl_pass_open_req6 *req;
struct inpcb *inp = lctx->inp;
wr = alloc_wrqe(sizeof(*req), lctx->ctrlq);
if (wr == NULL) {
log(LOG_ERR, "%s: allocation failure", __func__);
return (ENOMEM);
}
req = wrtod(wr);
INIT_TP_WR(req, 0);
OPCODE_TID(req) = htobe32(MK_OPCODE_TID(CPL_PASS_OPEN_REQ6, lctx->stid));
req->local_port = inp->inp_lport;
req->peer_port = 0;
req->local_ip_hi = *(uint64_t *)&inp->in6p_laddr.s6_addr[0];
req->local_ip_lo = *(uint64_t *)&inp->in6p_laddr.s6_addr[8];
req->peer_ip_hi = 0;
req->peer_ip_lo = 0;
req->opt0 = htobe64(V_TX_CHAN(lctx->ctrlq->eq.tx_chan));
req->opt1 = htobe64(V_CONN_POLICY(CPL_CONN_POLICY_ASK) |
F_SYN_RSS_ENABLE | V_SYN_RSS_QUEUE(lctx->ofld_rxq->iq.abs_id));
t4_wrq_tx(sc, wr);
return (0);
}
static int
destroy_server(struct adapter *sc, struct listen_ctx *lctx)
{
struct wrqe *wr;
struct cpl_close_listsvr_req *req;
wr = alloc_wrqe(sizeof(*req), lctx->ctrlq);
if (wr == NULL) {
/* XXX */
panic("%s: allocation failure.", __func__);
}
req = wrtod(wr);
INIT_TP_WR(req, 0);
OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ,
lctx->stid));
req->reply_ctrl = htobe16(lctx->ofld_rxq->iq.abs_id);
req->rsvd = htobe16(0);
t4_wrq_tx(sc, wr);
return (0);
}
/*
* Start a listening server by sending a passive open request to HW.
*
* Can't take adapter lock here and access to sc->flags,
* sc->offload_map, if_capenable are all race prone.
*/
int
t4_listen_start(struct toedev *tod, struct tcpcb *tp)
{
struct adapter *sc = tod->tod_softc;
struct vi_info *vi;
struct port_info *pi;
struct inpcb *inp = tp->t_inpcb;
struct listen_ctx *lctx;
int i, rc, v;
struct offload_settings settings;
INP_WLOCK_ASSERT(inp);
rw_rlock(&sc->policy_lock);
settings = *lookup_offload_policy(sc, OPEN_TYPE_LISTEN, NULL,
EVL_MAKETAG(0xfff, 0, 0), inp);
rw_runlock(&sc->policy_lock);
if (!settings.offload)
return (0);
/* Don't start a hardware listener for any loopback address. */
if (inp->inp_vflag & INP_IPV6 && IN6_IS_ADDR_LOOPBACK(&inp->in6p_laddr))
return (0);
if (!(inp->inp_vflag & INP_IPV6) &&
IN_LOOPBACK(ntohl(inp->inp_laddr.s_addr)))
return (0);
if (sc->flags & KERN_TLS_OK)
return (0);
#if 0
ADAPTER_LOCK(sc);
if (IS_BUSY(sc)) {
log(LOG_ERR, "%s: listen request ignored, %s is busy",
__func__, device_get_nameunit(sc->dev));
goto done;
}
KASSERT(uld_active(sc, ULD_TOM),
("%s: TOM not initialized", __func__));
#endif
/*
* Find an initialized VI with IFCAP_TOE (4 or 6). We'll use the first
* such VI's queues to send the passive open and receive the reply to
* it.
*
* XXX: need a way to mark a port in use by offload. if_cxgbe should
* then reject any attempt to bring down such a port (and maybe reject
* attempts to disable IFCAP_TOE on that port too?).
*/
for_each_port(sc, i) {
pi = sc->port[i];
for_each_vi(pi, v, vi) {
if (vi->flags & VI_INIT_DONE &&
vi->ifp->if_capenable & IFCAP_TOE)
goto found;
}
}
goto done; /* no port that's UP with IFCAP_TOE enabled */
found:
if (listen_hash_find(sc, inp) != NULL)
goto done; /* already setup */
lctx = alloc_lctx(sc, inp, vi);
if (lctx == NULL) {
log(LOG_ERR,
"%s: listen request ignored, %s couldn't allocate lctx\n",
__func__, device_get_nameunit(sc->dev));
goto done;
}
listen_hash_add(sc, lctx);
CTR6(KTR_CXGBE, "%s: stid %u (%s), lctx %p, inp %p vflag 0x%x",
__func__, lctx->stid, tcpstates[tp->t_state], lctx, inp,
inp->inp_vflag);
if (inp->inp_vflag & INP_IPV6)
rc = create_server6(sc, lctx);
else
rc = create_server(sc, lctx);
if (rc != 0) {
log(LOG_ERR, "%s: %s failed to create hw listener: %d.\n",
__func__, device_get_nameunit(sc->dev), rc);
(void) listen_hash_del(sc, inp);
inp = release_lctx(sc, lctx);
/* can't be freed, host stack has a reference */
KASSERT(inp != NULL, ("%s: inp freed", __func__));
goto done;
}
lctx->flags |= LCTX_RPL_PENDING;
done:
#if 0
ADAPTER_UNLOCK(sc);
#endif
return (0);
}
int
t4_listen_stop(struct toedev *tod, struct tcpcb *tp)
{
struct listen_ctx *lctx;
struct adapter *sc = tod->tod_softc;
struct inpcb *inp = tp->t_inpcb;
INP_WLOCK_ASSERT(inp);
lctx = listen_hash_del(sc, inp);
if (lctx == NULL)
return (ENOENT); /* no hardware listener for this inp */
CTR4(KTR_CXGBE, "%s: stid %u, lctx %p, flags %x", __func__, lctx->stid,
lctx, lctx->flags);
/*
* If the reply to the PASS_OPEN is still pending we'll wait for it to
* arrive and clean up when it does.
*/
if (lctx->flags & LCTX_RPL_PENDING) {
return (EINPROGRESS);
}
destroy_server(sc, lctx);
return (0);
}
static inline struct synq_entry *
alloc_synqe(struct adapter *sc __unused, struct listen_ctx *lctx, int flags)
{
struct synq_entry *synqe;
INP_WLOCK_ASSERT(lctx->inp);
MPASS(flags == M_WAITOK || flags == M_NOWAIT);
synqe = malloc(sizeof(*synqe), M_CXGBE, flags);
if (__predict_true(synqe != NULL)) {
synqe->flags = TPF_SYNQE;
refcount_init(&synqe->refcnt, 1);
synqe->lctx = lctx;
hold_lctx(lctx); /* Every synqe has a ref on its lctx. */
synqe->syn = NULL;
}
return (synqe);
}
static inline void
hold_synqe(struct synq_entry *synqe)
{
refcount_acquire(&synqe->refcnt);
}
static inline struct inpcb *
release_synqe(struct adapter *sc, struct synq_entry *synqe)
{
struct inpcb *inp;
MPASS(synqe->flags & TPF_SYNQE);
MPASS(synqe->lctx != NULL);
inp = synqe->lctx->inp;
MPASS(inp != NULL);
INP_WLOCK_ASSERT(inp);
if (refcount_release(&synqe->refcnt)) {
inp = release_lctx(sc, synqe->lctx);
m_freem(synqe->syn);
free(synqe, M_CXGBE);
}
return (inp);
}
void
t4_syncache_added(struct toedev *tod __unused, void *arg)
{
struct synq_entry *synqe = arg;
hold_synqe(synqe);
}
void
t4_syncache_removed(struct toedev *tod, void *arg)
{
struct adapter *sc = tod->tod_softc;
struct synq_entry *synqe = arg;
struct inpcb *inp = synqe->lctx->inp;
/*
* XXX: this is a LOR but harmless when running from the softclock.
*/
INP_WLOCK(inp);
inp = release_synqe(sc, synqe);
if (inp != NULL)
INP_WUNLOCK(inp);
}
int
t4_syncache_respond(struct toedev *tod, void *arg, struct mbuf *m)
{
struct synq_entry *synqe = arg;
if (atomic_fetchadd_int(&synqe->ok_to_respond, 1) == 0) {
struct tcpopt to;
struct ip *ip = mtod(m, struct ip *);
struct tcphdr *th;
if (ip->ip_v == IPVERSION)
th = (void *)(ip + 1);
else
th = (void *)((struct ip6_hdr *)ip + 1);
bzero(&to, sizeof(to));
tcp_dooptions(&to, (void *)(th + 1),
(th->th_off << 2) - sizeof(*th), TO_SYN);
/* save these for later */
synqe->iss = be32toh(th->th_seq);
synqe->irs = be32toh(th->th_ack) - 1;
synqe->ts = to.to_tsval;
}
m_freem(m); /* don't need this any more */
return (0);
}
static int
do_pass_open_rpl(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_pass_open_rpl *cpl = (const void *)(rss + 1);
int stid = GET_TID(cpl);
unsigned int status = cpl->status;
struct listen_ctx *lctx = lookup_stid(sc, stid);
struct inpcb *inp = lctx->inp;
#ifdef INVARIANTS
unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl)));
#endif
KASSERT(opcode == CPL_PASS_OPEN_RPL,
("%s: unexpected opcode 0x%x", __func__, opcode));
KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__));
KASSERT(lctx->stid == stid, ("%s: lctx stid mismatch", __func__));
INP_WLOCK(inp);
CTR4(KTR_CXGBE, "%s: stid %d, status %u, flags 0x%x",
__func__, stid, status, lctx->flags);
lctx->flags &= ~LCTX_RPL_PENDING;
if (status != CPL_ERR_NONE)
log(LOG_ERR, "listener (stid %u) failed: %d\n", stid, status);
#ifdef INVARIANTS
/*
* If the inp has been dropped (listening socket closed) then
* listen_stop must have run and taken the inp out of the hash.
*/
if (inp->inp_flags & INP_DROPPED) {
KASSERT(listen_hash_del(sc, inp) == NULL,
("%s: inp %p still in listen hash", __func__, inp));
}
#endif
if (inp->inp_flags & INP_DROPPED && status != CPL_ERR_NONE) {
if (release_lctx(sc, lctx) != NULL)
INP_WUNLOCK(inp);
return (status);
}
/*
* Listening socket stopped listening earlier and now the chip tells us
* it has started the hardware listener. Stop it; the lctx will be
* released in do_close_server_rpl.
*/
if (inp->inp_flags & INP_DROPPED) {
destroy_server(sc, lctx);
INP_WUNLOCK(inp);
return (status);
}
/*
* Failed to start hardware listener. Take inp out of the hash and
* release our reference on it. An error message has been logged
* already.
*/
if (status != CPL_ERR_NONE) {
listen_hash_del(sc, inp);
if (release_lctx(sc, lctx) != NULL)
INP_WUNLOCK(inp);
return (status);
}
/* hardware listener open for business */
INP_WUNLOCK(inp);
return (status);
}
static int
do_close_server_rpl(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_close_listsvr_rpl *cpl = (const void *)(rss + 1);
int stid = GET_TID(cpl);
unsigned int status = cpl->status;
struct listen_ctx *lctx = lookup_stid(sc, stid);
struct inpcb *inp = lctx->inp;
#ifdef INVARIANTS
unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl)));
#endif
KASSERT(opcode == CPL_CLOSE_LISTSRV_RPL,
("%s: unexpected opcode 0x%x", __func__, opcode));
KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__));
KASSERT(lctx->stid == stid, ("%s: lctx stid mismatch", __func__));
CTR3(KTR_CXGBE, "%s: stid %u, status %u", __func__, stid, status);
if (status != CPL_ERR_NONE) {
log(LOG_ERR, "%s: failed (%u) to close listener for stid %u\n",
__func__, status, stid);
return (status);
}
INP_WLOCK(inp);
inp = release_lctx(sc, lctx);
if (inp != NULL)
INP_WUNLOCK(inp);
return (status);
}
static void
done_with_synqe(struct adapter *sc, struct synq_entry *synqe)
{
struct listen_ctx *lctx = synqe->lctx;
struct inpcb *inp = lctx->inp;
struct l2t_entry *e = &sc->l2t->l2tab[synqe->params.l2t_idx];
int ntids;
INP_WLOCK_ASSERT(inp);
ntids = inp->inp_vflag & INP_IPV6 ? 2 : 1;
remove_tid(sc, synqe->tid, ntids);
release_tid(sc, synqe->tid, lctx->ctrlq);
t4_l2t_release(e);
inp = release_synqe(sc, synqe);
if (inp)
INP_WUNLOCK(inp);
}
void
synack_failure_cleanup(struct adapter *sc, int tid)
{
struct synq_entry *synqe = lookup_tid(sc, tid);
INP_WLOCK(synqe->lctx->inp);
done_with_synqe(sc, synqe);
}
int
do_abort_req_synqe(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_abort_req_rss *cpl = (const void *)(rss + 1);
unsigned int tid = GET_TID(cpl);
struct synq_entry *synqe = lookup_tid(sc, tid);
struct listen_ctx *lctx = synqe->lctx;
struct inpcb *inp = lctx->inp;
struct sge_wrq *ofld_txq;
#ifdef INVARIANTS
unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl)));
#endif
KASSERT(opcode == CPL_ABORT_REQ_RSS,
("%s: unexpected opcode 0x%x", __func__, opcode));
KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__));
KASSERT(synqe->tid == tid, ("%s: toep tid mismatch", __func__));
CTR6(KTR_CXGBE, "%s: tid %u, synqe %p (0x%x), lctx %p, status %d",
__func__, tid, synqe, synqe->flags, synqe->lctx, cpl->status);
if (negative_advice(cpl->status))
return (0); /* Ignore negative advice */
INP_WLOCK(inp);
ofld_txq = &sc->sge.ofld_txq[synqe->params.txq_idx];
/*
* If we'd initiated an abort earlier the reply to it is responsible for
* cleaning up resources. Otherwise we tear everything down right here
* right now. We owe the T4 a CPL_ABORT_RPL no matter what.
*/
if (synqe->flags & TPF_ABORT_SHUTDOWN) {
INP_WUNLOCK(inp);
goto done;
}
done_with_synqe(sc, synqe);
/* inp lock released by done_with_synqe */
done:
send_abort_rpl(sc, ofld_txq, tid, CPL_ABORT_NO_RST);
return (0);
}
int
do_abort_rpl_synqe(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_abort_rpl_rss *cpl = (const void *)(rss + 1);
unsigned int tid = GET_TID(cpl);
struct synq_entry *synqe = lookup_tid(sc, tid);
struct listen_ctx *lctx = synqe->lctx;
struct inpcb *inp = lctx->inp;
#ifdef INVARIANTS
unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl)));
#endif
KASSERT(opcode == CPL_ABORT_RPL_RSS,
("%s: unexpected opcode 0x%x", __func__, opcode));
KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__));
KASSERT(synqe->tid == tid, ("%s: toep tid mismatch", __func__));
CTR6(KTR_CXGBE, "%s: tid %u, synqe %p (0x%x), lctx %p, status %d",
__func__, tid, synqe, synqe->flags, synqe->lctx, cpl->status);
INP_WLOCK(inp);
KASSERT(synqe->flags & TPF_ABORT_SHUTDOWN,
("%s: wasn't expecting abort reply for synqe %p (0x%x)",
__func__, synqe, synqe->flags));
done_with_synqe(sc, synqe);
/* inp lock released by done_with_synqe */
return (0);
}
void
t4_offload_socket(struct toedev *tod, void *arg, struct socket *so)
{
struct adapter *sc = tod->tod_softc;
struct synq_entry *synqe = arg;
struct inpcb *inp = sotoinpcb(so);
struct toepcb *toep = synqe->toep;
NET_EPOCH_ASSERT(); /* prevents bad race with accept() */
INP_WLOCK_ASSERT(inp);
KASSERT(synqe->flags & TPF_SYNQE,
("%s: %p not a synq_entry?", __func__, arg));
MPASS(toep->tid == synqe->tid);
offload_socket(so, toep);
make_established(toep, synqe->iss, synqe->irs, synqe->tcp_opt);
toep->flags |= TPF_CPL_PENDING;
update_tid(sc, synqe->tid, toep);
synqe->flags |= TPF_SYNQE_EXPANDED;
inp->inp_flowtype = (inp->inp_vflag & INP_IPV6) ?
M_HASHTYPE_RSS_TCP_IPV6 : M_HASHTYPE_RSS_TCP_IPV4;
inp->inp_flowid = synqe->rss_hash;
}
static void
t4opt_to_tcpopt(const struct tcp_options *t4opt, struct tcpopt *to)
{
bzero(to, sizeof(*to));
if (t4opt->mss) {
to->to_flags |= TOF_MSS;
to->to_mss = be16toh(t4opt->mss);
}
if (t4opt->wsf > 0 && t4opt->wsf < 15) {
to->to_flags |= TOF_SCALE;
to->to_wscale = t4opt->wsf;
}
if (t4opt->tstamp)
to->to_flags |= TOF_TS;
if (t4opt->sack)
to->to_flags |= TOF_SACKPERM;
}
static void
pass_accept_req_to_protohdrs(struct adapter *sc, const struct mbuf *m,
struct in_conninfo *inc, struct tcphdr *th, uint8_t *iptos)
{
const struct cpl_pass_accept_req *cpl = mtod(m, const void *);
const struct ether_header *eh;
unsigned int hlen = be32toh(cpl->hdr_len);
uintptr_t l3hdr;
const struct tcphdr *tcp;
eh = (const void *)(cpl + 1);
if (chip_id(sc) >= CHELSIO_T6) {
l3hdr = ((uintptr_t)eh + G_T6_ETH_HDR_LEN(hlen));
tcp = (const void *)(l3hdr + G_T6_IP_HDR_LEN(hlen));
} else {
l3hdr = ((uintptr_t)eh + G_ETH_HDR_LEN(hlen));
tcp = (const void *)(l3hdr + G_IP_HDR_LEN(hlen));
}
/* extract TOS (DiffServ + ECN) byte for AccECN */
if (iptos) {
if (((struct ip *)l3hdr)->ip_v == IPVERSION) {
const struct ip *ip = (const void *)l3hdr;
*iptos = ip->ip_tos;
}
#ifdef INET6
else
if (((struct ip *)l3hdr)->ip_v == (IPV6_VERSION >> 4)) {
const struct ip6_hdr *ip6 = (const void *)l3hdr;
*iptos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
}
#endif /* INET */
}
if (inc) {
bzero(inc, sizeof(*inc));
inc->inc_fport = tcp->th_sport;
inc->inc_lport = tcp->th_dport;
if (((struct ip *)l3hdr)->ip_v == IPVERSION) {
const struct ip *ip = (const void *)l3hdr;
inc->inc_faddr = ip->ip_src;
inc->inc_laddr = ip->ip_dst;
} else {
const struct ip6_hdr *ip6 = (const void *)l3hdr;
inc->inc_flags |= INC_ISIPV6;
inc->inc6_faddr = ip6->ip6_src;
inc->inc6_laddr = ip6->ip6_dst;
}
}
if (th) {
bcopy(tcp, th, sizeof(*th));
tcp_fields_to_host(th); /* just like tcp_input */
}
}
static struct l2t_entry *
get_l2te_for_nexthop(struct port_info *pi, struct ifnet *ifp,
struct in_conninfo *inc)
{
struct l2t_entry *e;
struct sockaddr_in6 sin6;
struct sockaddr *dst = (void *)&sin6;
struct nhop_object *nh;
if (inc->inc_flags & INC_ISIPV6) {
bzero(dst, sizeof(struct sockaddr_in6));
dst->sa_len = sizeof(struct sockaddr_in6);
dst->sa_family = AF_INET6;
if (IN6_IS_ADDR_LINKLOCAL(&inc->inc6_laddr)) {
/* no need for route lookup */
e = t4_l2t_get(pi, ifp, dst);
return (e);
}
nh = fib6_lookup(RT_DEFAULT_FIB, &inc->inc6_faddr, 0, NHR_NONE, 0);
if (nh == NULL)
return (NULL);
if (nh->nh_ifp != ifp)
return (NULL);
if (nh->nh_flags & NHF_GATEWAY)
((struct sockaddr_in6 *)dst)->sin6_addr = nh->gw6_sa.sin6_addr;
else
((struct sockaddr_in6 *)dst)->sin6_addr = inc->inc6_faddr;
} else {
dst->sa_len = sizeof(struct sockaddr_in);
dst->sa_family = AF_INET;
nh = fib4_lookup(RT_DEFAULT_FIB, inc->inc_faddr, 0, NHR_NONE, 0);
if (nh == NULL)
return (NULL);
if (nh->nh_ifp != ifp)
return (NULL);
if (nh->nh_flags & NHF_GATEWAY)
((struct sockaddr_in *)dst)->sin_addr = nh->gw4_sa.sin_addr;
else
((struct sockaddr_in *)dst)->sin_addr = inc->inc_faddr;
}
e = t4_l2t_get(pi, ifp, dst);
return (e);
}
static int
send_synack(struct adapter *sc, struct synq_entry *synqe, uint64_t opt0,
uint32_t opt2, int tid)
{
struct wrqe *wr;
struct cpl_pass_accept_rpl *rpl;
struct l2t_entry *e = &sc->l2t->l2tab[synqe->params.l2t_idx];
wr = alloc_wrqe(is_t4(sc) ? sizeof(struct cpl_pass_accept_rpl) :
sizeof(struct cpl_t5_pass_accept_rpl), &sc->sge.ctrlq[0]);
if (wr == NULL)
return (ENOMEM);
rpl = wrtod(wr);
if (is_t4(sc))
INIT_TP_WR_MIT_CPL(rpl, CPL_PASS_ACCEPT_RPL, tid);
else {
struct cpl_t5_pass_accept_rpl *rpl5 = (void *)rpl;
INIT_TP_WR_MIT_CPL(rpl5, CPL_PASS_ACCEPT_RPL, tid);
rpl5->iss = htobe32(synqe->iss);
}
rpl->opt0 = opt0;
rpl->opt2 = opt2;
return (t4_l2t_send(sc, wr, e));
}
#define REJECT_PASS_ACCEPT_REQ(tunnel) do { \
if (!tunnel) { \
m_freem(m); \
m = NULL; \
} \
reject_reason = __LINE__; \
goto reject; \
} while (0)
/*
* The context associated with a tid entry via insert_tid could be a synq_entry
* or a toepcb. The only way CPL handlers can tell is via a bit in these flags.
*/
CTASSERT(offsetof(struct toepcb, flags) == offsetof(struct synq_entry, flags));
/*
* Incoming SYN on a listening socket.
*
* XXX: Every use of ifp in this routine has a bad race with up/down, toe/-toe,
* etc.
*/
static int
do_pass_accept_req(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
struct adapter *sc = iq->adapter;
struct toedev *tod;
const struct cpl_pass_accept_req *cpl = mtod(m, const void *);
unsigned int stid = G_PASS_OPEN_TID(be32toh(cpl->tos_stid));
unsigned int tid = GET_TID(cpl);
struct listen_ctx *lctx = lookup_stid(sc, stid);
struct inpcb *inp;
struct socket *so;
struct in_conninfo inc;
struct tcphdr th;
struct tcpopt to;
struct port_info *pi;
struct vi_info *vi;
struct ifnet *hw_ifp, *ifp;
struct l2t_entry *e = NULL;
struct synq_entry *synqe = NULL;
int reject_reason, v, ntids;
uint16_t vid, l2info;
struct epoch_tracker et;
#ifdef INVARIANTS
unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl)));
#endif
struct offload_settings settings;
uint8_t iptos;
KASSERT(opcode == CPL_PASS_ACCEPT_REQ,
("%s: unexpected opcode 0x%x", __func__, opcode));
KASSERT(lctx->stid == stid, ("%s: lctx stid mismatch", __func__));
CTR4(KTR_CXGBE, "%s: stid %u, tid %u, lctx %p", __func__, stid, tid,
lctx);
CURVNET_SET(lctx->vnet); /* before any potential REJECT */
/*
* Use the MAC index to lookup the associated VI. If this SYN didn't
* match a perfect MAC filter, punt.
*/
l2info = be16toh(cpl->l2info);
pi = sc->port[G_SYN_INTF(l2info)];
if (!(l2info & F_SYN_XACT_MATCH)) {
REJECT_PASS_ACCEPT_REQ(false);
}
for_each_vi(pi, v, vi) {
if (vi->xact_addr_filt == G_SYN_MAC_IDX(l2info))
goto found;
}
REJECT_PASS_ACCEPT_REQ(false);
found:
hw_ifp = vi->ifp; /* the cxgbe ifnet */
m->m_pkthdr.rcvif = hw_ifp;
tod = TOEDEV(hw_ifp);
/*
* Don't offload if the peer requested a TCP option that's not known to
* the silicon. Send the SYN to the kernel instead.
*/
if (__predict_false(cpl->tcpopt.unknown))
REJECT_PASS_ACCEPT_REQ(true);
/*
* Figure out if there is a pseudo interface (vlan, lagg, etc.)
* involved. Don't offload if the SYN had a VLAN tag and the vid
* doesn't match anything on this interface.
*
* XXX: lagg support, lagg + vlan support.
*/
vid = EVL_VLANOFTAG(be16toh(cpl->vlan));
if (vid != 0xfff && vid != 0) {
ifp = VLAN_DEVAT(hw_ifp, vid);
if (ifp == NULL)
REJECT_PASS_ACCEPT_REQ(true);
} else
ifp = hw_ifp;
/*
* Don't offload if the ifnet that the SYN came in on is not in the same
* vnet as the listening socket.
*/
if (lctx->vnet != ifp->if_vnet)
REJECT_PASS_ACCEPT_REQ(true);
pass_accept_req_to_protohdrs(sc, m, &inc, &th, &iptos);
if (inc.inc_flags & INC_ISIPV6) {
/* Don't offload if the ifcap isn't enabled */
if ((ifp->if_capenable & IFCAP_TOE6) == 0)
REJECT_PASS_ACCEPT_REQ(true);
/*
* SYN must be directed to an IP6 address on this ifnet. This
* is more restrictive than in6_localip.
*/
NET_EPOCH_ENTER(et);
if (!in6_ifhasaddr(ifp, &inc.inc6_laddr)) {
NET_EPOCH_EXIT(et);
REJECT_PASS_ACCEPT_REQ(true);
}
ntids = 2;
} else {
/* Don't offload if the ifcap isn't enabled */
if ((ifp->if_capenable & IFCAP_TOE4) == 0)
REJECT_PASS_ACCEPT_REQ(true);
/*
* SYN must be directed to an IP address on this ifnet. This
* is more restrictive than in_localip.
*/
NET_EPOCH_ENTER(et);
if (!in_ifhasaddr(ifp, inc.inc_laddr)) {
NET_EPOCH_EXIT(et);
REJECT_PASS_ACCEPT_REQ(true);
}
ntids = 1;
}
e = get_l2te_for_nexthop(pi, ifp, &inc);
if (e == NULL) {
NET_EPOCH_EXIT(et);
REJECT_PASS_ACCEPT_REQ(true);
}
/* Don't offload if the 4-tuple is already in use */
if (toe_4tuple_check(&inc, &th, ifp) != 0) {
NET_EPOCH_EXIT(et);
REJECT_PASS_ACCEPT_REQ(false);
}
inp = lctx->inp; /* listening socket, not owned by TOE */
INP_WLOCK(inp);
/* Don't offload if the listening socket has closed */
if (__predict_false(inp->inp_flags & INP_DROPPED)) {
INP_WUNLOCK(inp);
NET_EPOCH_EXIT(et);
REJECT_PASS_ACCEPT_REQ(false);
}
so = inp->inp_socket;
rw_rlock(&sc->policy_lock);
settings = *lookup_offload_policy(sc, OPEN_TYPE_PASSIVE, m,
EVL_MAKETAG(0xfff, 0, 0), inp);
rw_runlock(&sc->policy_lock);
if (!settings.offload) {
INP_WUNLOCK(inp);
NET_EPOCH_EXIT(et);
REJECT_PASS_ACCEPT_REQ(true); /* Rejected by COP. */
}
synqe = alloc_synqe(sc, lctx, M_NOWAIT);
if (synqe == NULL) {
INP_WUNLOCK(inp);
NET_EPOCH_EXIT(et);
REJECT_PASS_ACCEPT_REQ(true);
}
MPASS(rss->hash_type == RSS_HASH_TCP);
synqe->rss_hash = be32toh(rss->hash_val);
atomic_store_int(&synqe->ok_to_respond, 0);
init_conn_params(vi, &settings, &inc, so, &cpl->tcpopt, e->idx,
&synqe->params);
/*
* If all goes well t4_syncache_respond will get called during
* syncache_add. Note that syncache_add releases the pcb lock.
*/
t4opt_to_tcpopt(&cpl->tcpopt, &to);
toe_syncache_add(&inc, &to, &th, inp, tod, synqe, iptos);
if (atomic_load_int(&synqe->ok_to_respond) > 0) {
uint64_t opt0;
uint32_t opt2;
opt0 = calc_options0(vi, &synqe->params);
opt2 = calc_options2(vi, &synqe->params);
insert_tid(sc, tid, synqe, ntids);
synqe->tid = tid;
synqe->syn = m;
m = NULL;
if (send_synack(sc, synqe, opt0, opt2, tid) != 0) {
remove_tid(sc, tid, ntids);
m = synqe->syn;
synqe->syn = NULL;
NET_EPOCH_EXIT(et);
REJECT_PASS_ACCEPT_REQ(true);
}
CTR6(KTR_CXGBE,
"%s: stid %u, tid %u, synqe %p, opt0 %#016lx, opt2 %#08x",
__func__, stid, tid, synqe, be64toh(opt0), be32toh(opt2));
} else {
NET_EPOCH_EXIT(et);
REJECT_PASS_ACCEPT_REQ(false);
}
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (0);
reject:
CURVNET_RESTORE();
CTR4(KTR_CXGBE, "%s: stid %u, tid %u, REJECT (%d)", __func__, stid, tid,
reject_reason);
if (e)
t4_l2t_release(e);
release_tid(sc, tid, lctx->ctrlq);
if (synqe) {
inp = synqe->lctx->inp;
INP_WLOCK(inp);
inp = release_synqe(sc, synqe);
if (inp)
INP_WUNLOCK(inp);
}
if (m) {
/*
* The connection request hit a TOE listener but is being passed
* on to the kernel sw stack instead of getting offloaded.
*/
m_adj(m, sizeof(*cpl));
m->m_pkthdr.csum_flags |= (CSUM_IP_CHECKED | CSUM_IP_VALID |
CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
m->m_pkthdr.csum_data = 0xffff;
hw_ifp->if_input(hw_ifp, m);
}
return (reject_reason);
}
static void
synqe_to_protohdrs(struct adapter *sc, struct synq_entry *synqe,
const struct cpl_pass_establish *cpl, struct in_conninfo *inc,
struct tcphdr *th, struct tcpopt *to)
{
uint16_t tcp_opt = be16toh(cpl->tcp_opt);
uint8_t iptos;
/* start off with the original SYN */
pass_accept_req_to_protohdrs(sc, synqe->syn, inc, th, &iptos);
/* modify parts to make it look like the ACK to our SYN|ACK */
th->th_flags = TH_ACK;
th->th_ack = synqe->iss + 1;
th->th_seq = be32toh(cpl->rcv_isn);
bzero(to, sizeof(*to));
if (G_TCPOPT_TSTAMP(tcp_opt)) {
to->to_flags |= TOF_TS;
to->to_tsecr = synqe->ts;
}
}
static int
do_pass_establish(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
struct adapter *sc = iq->adapter;
struct vi_info *vi;
struct ifnet *ifp;
const struct cpl_pass_establish *cpl = (const void *)(rss + 1);
#if defined(KTR) || defined(INVARIANTS)
unsigned int stid = G_PASS_OPEN_TID(be32toh(cpl->tos_stid));
#endif
unsigned int tid = GET_TID(cpl);
struct synq_entry *synqe = lookup_tid(sc, tid);
struct listen_ctx *lctx = synqe->lctx;
struct inpcb *inp = lctx->inp, *new_inp;
struct socket *so;
struct tcphdr th;
struct tcpopt to;
struct in_conninfo inc;
struct toepcb *toep;
struct epoch_tracker et;
#ifdef INVARIANTS
unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl)));
#endif
KASSERT(opcode == CPL_PASS_ESTABLISH,
("%s: unexpected opcode 0x%x", __func__, opcode));
KASSERT(m == NULL, ("%s: wasn't expecting payload", __func__));
KASSERT(lctx->stid == stid, ("%s: lctx stid mismatch", __func__));
KASSERT(synqe->flags & TPF_SYNQE,
("%s: tid %u (ctx %p) not a synqe", __func__, tid, synqe));
CURVNET_SET(lctx->vnet);
NET_EPOCH_ENTER(et); /* for syncache_expand */
INP_WLOCK(inp);
CTR6(KTR_CXGBE,
"%s: stid %u, tid %u, synqe %p (0x%x), inp_flags 0x%x",
__func__, stid, tid, synqe, synqe->flags, inp->inp_flags);
ifp = synqe->syn->m_pkthdr.rcvif;
vi = ifp->if_softc;
KASSERT(vi->pi->adapter == sc,
("%s: vi %p, sc %p mismatch", __func__, vi, sc));
if (__predict_false(inp->inp_flags & INP_DROPPED)) {
reset:
send_reset_synqe(TOEDEV(ifp), synqe);
INP_WUNLOCK(inp);
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (0);
}
KASSERT(synqe->params.rxq_idx == iq_to_ofld_rxq(iq) - &sc->sge.ofld_rxq[0],
("%s: CPL arrived on unexpected rxq. %d %d", __func__,
synqe->params.rxq_idx,
(int)(iq_to_ofld_rxq(iq) - &sc->sge.ofld_rxq[0])));
toep = alloc_toepcb(vi, M_NOWAIT);
if (toep == NULL)
goto reset;
toep->tid = tid;
toep->l2te = &sc->l2t->l2tab[synqe->params.l2t_idx];
toep->vnet = lctx->vnet;
bcopy(&synqe->params, &toep->params, sizeof(toep->params));
init_toepcb(vi, toep);
MPASS(be32toh(cpl->snd_isn) - 1 == synqe->iss);
MPASS(be32toh(cpl->rcv_isn) - 1 == synqe->irs);
synqe->tcp_opt = cpl->tcp_opt;
synqe->toep = toep;
/* Come up with something that syncache_expand should be ok with. */
synqe_to_protohdrs(sc, synqe, cpl, &inc, &th, &to);
if (inc.inc_flags & INC_ISIPV6)
toep->ce = t4_hold_lip(sc, &inc.inc6_laddr, lctx->ce);
so = inp->inp_socket;
KASSERT(so != NULL, ("%s: socket is NULL", __func__));
if (!toe_syncache_expand(&inc, &to, &th, &so) || so == NULL) {
free_toepcb(toep);
goto reset;
}
/* New connection inpcb is already locked by syncache_expand(). */
new_inp = sotoinpcb(so);
INP_WLOCK_ASSERT(new_inp);
MPASS(so->so_vnet == lctx->vnet);
/*
* This is for expansion from syncookies.
*
* XXX: we've held the tcbinfo lock throughout so there's no risk of
* anyone accept'ing a connection before we've installed our hooks, but
* this somewhat defeats the purpose of having a tod_offload_socket :-(
*/
if (__predict_false(!(synqe->flags & TPF_SYNQE_EXPANDED))) {
tcp_timer_activate(intotcpcb(new_inp), TT_KEEP, 0);
t4_offload_socket(TOEDEV(ifp), synqe, so);
}
INP_WUNLOCK(new_inp);
/* Done with the synqe */
inp = release_synqe(sc, synqe);
if (inp != NULL)
INP_WUNLOCK(inp);
NET_EPOCH_EXIT(et);
CURVNET_RESTORE();
return (0);
}
void
t4_init_listen_cpl_handlers(void)
{
t4_register_cpl_handler(CPL_PASS_OPEN_RPL, do_pass_open_rpl);
t4_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_close_server_rpl);
t4_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_pass_accept_req);
t4_register_cpl_handler(CPL_PASS_ESTABLISH, do_pass_establish);
}
void
t4_uninit_listen_cpl_handlers(void)
{
t4_register_cpl_handler(CPL_PASS_OPEN_RPL, NULL);
t4_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, NULL);
t4_register_cpl_handler(CPL_PASS_ACCEPT_REQ, NULL);
t4_register_cpl_handler(CPL_PASS_ESTABLISH, NULL);
}
#endif
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