void
log_freemsg(mblk_t *mp)
{
mblk_t *mp2 = mp->b_cont;
ASSERT(MBLKL(mp) == sizeof (log_ctl_t));
ASSERT(mp2->b_rptr == mp2->b_datap->db_base);
if ((log_freeq->q_flag & QFULL) == 0 &&
MBLKL(mp2) <= LOG_MSGSIZE && MBLKSIZE(mp2) >= LOG_MSGSIZE)
(void) putq(log_freeq, mp);
else
freemsg(mp);
}
/*
* Switch ethernet frame when in layer 3 mode (i.e. using IP
* layer to do the routing).
*
* There is a large amount of overlap between this function and
* vsw_switch_l2_frame. At some stage we need to revisit and refactor
* both these functions.
*/
void
vsw_switch_l3_frame(vsw_t *vswp, mblk_t *mp, int caller,
vsw_port_t *arg, mac_resource_handle_t mrh)
{
struct ether_header *ehp;
mblk_t *bp = NULL;
vsw_fdbe_t *fp;
D1(vswp, "%s: enter (caller %d)", __func__, caller);
/*
* In layer 3 mode should only ever be switching packets
* between IP layer and vnet devices. So make sure thats
* who is invoking us.
*/
if ((caller != VSW_LOCALDEV) && (caller != VSW_VNETPORT)) {
DERR(vswp, "%s: unexpected caller (%d)", __func__, caller);
freemsgchain(mp);
return;
}
/* process the chain of packets */
bp = mp;
while (bp) {
ehp = (struct ether_header *)bp->b_rptr;
mp = vsw_get_same_dest_list(ehp, &bp);
ASSERT(mp != NULL);
D2(vswp, "%s: mblk data buffer %lld : actual data size %lld",
__func__, MBLKSIZE(mp), MBLKL(mp));
/*
* Find fdb entry for the destination
* and hold a reference to it.
*/
fp = vsw_fdbe_find(vswp, &ehp->ether_dhost);
if (fp != NULL) {
D2(vswp, "%s: sending to target port", __func__);
(void) vsw_portsend(fp->portp, mp);
/* Release the reference on the fdb entry */
VSW_FDBE_REFRELE(fp);
} else {
/*
* Destination not in FDB
*
* If the destination is broadcast or
* multicast forward the packet to all
* (VNETPORTs, PHYSDEV, LOCALDEV),
* except the caller.
*/
if (IS_BROADCAST(ehp)) {
D2(vswp, "%s: BROADCAST pkt", __func__);
(void) vsw_forward_all(vswp, mp, caller, arg);
} else if (IS_MULTICAST(ehp)) {
D2(vswp, "%s: MULTICAST pkt", __func__);
(void) vsw_forward_grp(vswp, mp, caller, arg);
} else {
/*
* Unicast pkt from vnet that we don't have
* an FDB entry for, so must be destinded for
* the outside world. Attempt to send up to the
* IP layer to allow it to deal with it.
*/
if (caller == VSW_VNETPORT) {
vsw_mac_rx(vswp, mrh,
mp, VSW_MACRX_FREEMSG);
}
}
}
}
D1(vswp, "%s: exit", __func__);
}
/*
* Switch the given ethernet frame when operating in layer 2 mode.
*
* vswp: pointer to the vsw instance
* mp: pointer to chain of ethernet frame(s) to be switched
* caller: identifies the source of this frame as:
* 1. VSW_VNETPORT - a vsw port (connected to a vnet).
* 2. VSW_PHYSDEV - the physical ethernet device
* 3. VSW_LOCALDEV - vsw configured as a virtual interface
* arg: argument provided by the caller.
* 1. for VNETPORT - pointer to the corresponding vsw_port_t.
* 2. for PHYSDEV - NULL
* 3. for LOCALDEV - pointer to to this vsw_t(self)
*/
void
vsw_switch_l2_frame(vsw_t *vswp, mblk_t *mp, int caller,
vsw_port_t *arg, mac_resource_handle_t mrh)
{
struct ether_header *ehp;
mblk_t *bp, *ret_m;
vsw_fdbe_t *fp;
D1(vswp, "%s: enter (caller %d)", __func__, caller);
/*
* PERF: rather than breaking up the chain here, scan it
* to find all mblks heading to same destination and then
* pass that sub-chain to the lower transmit functions.
*/
/* process the chain of packets */
bp = mp;
while (bp) {
ehp = (struct ether_header *)bp->b_rptr;
mp = vsw_get_same_dest_list(ehp, &bp);
ASSERT(mp != NULL);
D2(vswp, "%s: mblk data buffer %lld : actual data size %lld",
__func__, MBLKSIZE(mp), MBLKL(mp));
if (ether_cmp(&ehp->ether_dhost, &vswp->if_addr) == 0) {
/*
* If destination is VSW_LOCALDEV (vsw as an eth
* interface) and if the device is up & running,
* send the packet up the stack on this host.
* If the virtual interface is down, drop the packet.
*/
if (caller != VSW_LOCALDEV) {
vsw_mac_rx(vswp, mrh, mp, VSW_MACRX_FREEMSG);
} else {
freemsgchain(mp);
}
continue;
}
/*
* Find fdb entry for the destination
* and hold a reference to it.
*/
fp = vsw_fdbe_find(vswp, &ehp->ether_dhost);
if (fp != NULL) {
/*
* If plumbed and in promisc mode then copy msg
* and send up the stack.
*/
vsw_mac_rx(vswp, mrh, mp,
VSW_MACRX_PROMISC | VSW_MACRX_COPYMSG);
/*
* If the destination is in FDB, the packet
* should be forwarded to the correponding
* vsw_port (connected to a vnet device -
* VSW_VNETPORT)
*/
(void) vsw_portsend(fp->portp, mp);
/* Release the reference on the fdb entry */
VSW_FDBE_REFRELE(fp);
} else {
/*
* Destination not in FDB.
*
* If the destination is broadcast or
* multicast forward the packet to all
* (VNETPORTs, PHYSDEV, LOCALDEV),
* except the caller.
*/
if (IS_BROADCAST(ehp)) {
D2(vswp, "%s: BROADCAST pkt", __func__);
(void) vsw_forward_all(vswp, mp, caller, arg);
} else if (IS_MULTICAST(ehp)) {
D2(vswp, "%s: MULTICAST pkt", __func__);
(void) vsw_forward_grp(vswp, mp, caller, arg);
} else {
/*
* If the destination is unicast, and came
* from either a logical network device or
* the switch itself when it is plumbed, then
* send it out on the physical device and also
* up the stack if the logical interface is
* in promiscious mode.
*
* NOTE: The assumption here is that if we
* cannot find the destination in our fdb, its
* a unicast address, and came from either a
* vnet or down the stack (when plumbed) it
* must be destinded for an ethernet device
* outside our ldoms.
*/
if (caller == VSW_VNETPORT) {
/* promisc check copy etc */
vsw_mac_rx(vswp, mrh, mp,
VSW_MACRX_PROMISC |
VSW_MACRX_COPYMSG);
if ((ret_m = vsw_tx_msg(vswp, mp,
caller, arg)) != NULL) {
DERR(vswp, "%s: drop mblks to "
"phys dev", __func__);
freemsgchain(ret_m);
}
} else if (caller == VSW_PHYSDEV) {
/*
* Pkt seen because card in promisc
* mode. Send up stack if plumbed in
* promisc mode, else drop it.
*/
vsw_mac_rx(vswp, mrh, mp,
VSW_MACRX_PROMISC |
VSW_MACRX_FREEMSG);
} else if (caller == VSW_LOCALDEV) {
/*
* Pkt came down the stack, send out
* over physical device.
*/
if ((ret_m = vsw_tx_msg(vswp, mp,
caller, NULL)) != NULL) {
DERR(vswp, "%s: drop mblks to "
"phys dev", __func__);
freemsgchain(ret_m);
}
}
}
}
}
D1(vswp, "%s: exit\n", __func__);
}
