cxgbe/tom: Add VIMAGE support to the TOE driver.

Active Open:
- Save the socket's vnet at the time of the active open (t4_connect) and
  switch to it when processing the reply (do_act_open_rpl or
  do_act_establish).

Passive Open:
- Save the listening socket's vnet in the driver's listen_ctx and switch
  to it when processing incoming SYNs for the socket.
- Reject SYNs that arrive on an ifnet that's not in the same vnet as the
  listening socket.

CLIP (Compressed Local IPv6) table:
- Add only those IPv6 addresses to the CLIP that are in a vnet
  associated with one of the card's ifnets.

Misc:
- Set vnet from the toepcb when processing TCP state transitions.
- The kernel sets the vnet when calling the driver's output routine
  so t4_push_frames runs in proper vnet context already.  One exception
  is when incoming credits trigger tx within the driver's ithread.  Set
  the vnet explicitly in do_fw4_ack for that case.

MFC after:	3 days
Sponsored by:	Chelsio Communications

1 files changed, 5 insertions, 0 deletions

diff --git a/sys/dev/cxgbe/tom/t4_connect.c b/sys/dev/cxgbe/tom/t4_connect.c
index f2e4ad456ef4..bd78c7fced61 100644
--- a/sys/dev/cxgbe/tom/t4_connect.c
+++ b/sys/dev/cxgbe/tom/t4_connect.c
@@ -126,6 +126,7 @@ do_act_establish(struct sge_iq *iq, const struct rss_header *rss,
 	CTR3(KTR_CXGBE, "%s: atid %u, tid %u", __func__, atid, tid);
 	free_atid(sc, atid);
 
+	CURVNET_SET(toep->vnet);
 	INP_WLOCK(inp);
 	toep->tid = tid;
 	insert_tid(sc, tid, toep, inp->inp_vflag & INP_IPV6 ? 2 : 1);
@@ -141,6 +142,7 @@ do_act_establish(struct sge_iq *iq, const struct rss_header *rss,
 	make_established(toep, cpl->snd_isn, cpl->rcv_isn, cpl->tcp_opt);
 done:
 	INP_WUNLOCK(inp);
+	CURVNET_RESTORE();
 	return (0);
 }
 
@@ -178,6 +180,7 @@ act_open_failure_cleanup(struct adapter *sc, u_int atid, u_int status)
 	free_atid(sc, atid);
 	toep->tid = -1;
 
+	CURVNET_SET(toep->vnet);
 	if (status != EAGAIN)
 		INP_INFO_RLOCK(&V_tcbinfo);
 	INP_WLOCK(inp);
@@ -185,6 +188,7 @@ act_open_failure_cleanup(struct adapter *sc, u_int atid, u_int status)
 	final_cpl_received(toep);	/* unlocks inp */
 	if (status != EAGAIN)
 		INP_INFO_RUNLOCK(&V_tcbinfo);
+	CURVNET_RESTORE();
 }
 
 /*
@@ -360,6 +364,7 @@ t4_connect(struct toedev *tod, struct socket *so, struct rtentry *rt,
 	if (wr == NULL)
 		DONT_OFFLOAD_ACTIVE_OPEN(ENOMEM);
 
+	toep->vnet = so->so_vnet;
 	if (sc->tt.ddp && (so->so_options & SO_NO_DDP) == 0)
 		set_tcpddp_ulp_mode(toep);
 	else