OpenSolaris_b135/uts/common/io/trill.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* This module supports AF_TRILL sockets and TRILL layer-2 forwarding.
*/
#include <sys/strsubr.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/modctl.h>
#include <sys/cmn_err.h>
#include <sys/tihdr.h>
#include <sys/strsun.h>
#include <sys/policy.h>
#include <sys/ethernet.h>
#include <sys/vlan.h>
#include <net/trill.h>
#include <net/if_dl.h>
#include <sys/mac.h>
#include <sys/mac_client.h>
#include <sys/mac_provider.h>
#include <sys/mac_client_priv.h>
#include <sys/sdt.h>
#include <sys/dls.h>
#include <sys/sunddi.h>
#include "trill_impl.h"
static void trill_del_all(trill_inst_t *, boolean_t);
static int trill_del_nick(trill_inst_t *, uint16_t, boolean_t);
static void trill_stop_recv(trill_sock_t *);
static void trill_ctrl_input(trill_sock_t *, mblk_t *, const uint8_t *,
uint16_t);
static trill_node_t *trill_node_lookup(trill_inst_t *, uint16_t);
static void trill_node_unref(trill_inst_t *, trill_node_t *);
static void trill_sock_unref(trill_sock_t *);
static void trill_kstats_init(trill_sock_t *, const char *);
static list_t trill_inst_list;
static krwlock_t trill_inst_rwlock;
static sock_lower_handle_t trill_create(int, int, int, sock_downcalls_t **,
uint_t *, int *, int, cred_t *);
static smod_reg_t sinfo = {
SOCKMOD_VERSION,
"trill",
SOCK_UC_VERSION,
SOCK_DC_VERSION,
trill_create,
NULL,
};
/* modldrv structure */
static struct modlsockmod sockmod = {
&mod_sockmodops, "AF_TRILL socket module", &sinfo
};
/* modlinkage structure */
static struct modlinkage ml = {
MODREV_1,
&sockmod,
NULL
};
#define VALID_NICK(n) ((n) != RBRIDGE_NICKNAME_NONE && \
(n) != RBRIDGE_NICKNAME_UNUSED)
static mblk_t *
create_trill_header(trill_sock_t *tsock, mblk_t *mp, const uint8_t *daddr,
boolean_t trill_hdr_ok, boolean_t multidest, uint16_t tci,
size_t msglen)
{
int extra_hdr_len;
struct ether_vlan_header *ethvlanhdr;
mblk_t *hdr_mp;
uint16_t etype;
etype = msglen > 0 ? (uint16_t)msglen : ETHERTYPE_TRILL;
/* When sending on the PVID, we must not give a VLAN ID */
if (tci == tsock->ts_link->bl_pvid)
tci = TRILL_NO_TCI;
/*
* Create new Ethernet header and include additional space
* for writing TRILL header and/or VLAN tag.
*/
extra_hdr_len = (trill_hdr_ok ? 0 : sizeof (trill_header_t)) +
(tci != TRILL_NO_TCI ? sizeof (struct ether_vlan_extinfo) : 0);
hdr_mp = mac_header(tsock->ts_link->bl_mh, daddr,
tci != TRILL_NO_TCI ? ETHERTYPE_VLAN : etype, mp, extra_hdr_len);
if (hdr_mp == NULL) {
freemsg(mp);
return (NULL);
}
if (tci != TRILL_NO_TCI) {
/* LINTED: alignment */
ethvlanhdr = (struct ether_vlan_header *)hdr_mp->b_rptr;
ethvlanhdr->ether_tci = htons(tci);
ethvlanhdr->ether_type = htons(etype);
hdr_mp->b_wptr += sizeof (struct ether_vlan_extinfo);
}
if (!trill_hdr_ok) {
trill_header_t *thp;
/* LINTED: alignment */
thp = (trill_header_t *)hdr_mp->b_wptr;
(void) memset(thp, 0, sizeof (trill_header_t));
thp->th_hopcount = TRILL_DEFAULT_HOPS;
thp->th_multidest = (multidest ? 1:0);
hdr_mp->b_wptr += sizeof (trill_header_t);
}
hdr_mp->b_cont = mp;
return (hdr_mp);
}
/*
* TRILL local recv function. TRILL data frames that should be received
* by the local system are decapsulated here and passed to bridging for
* learning and local system receive. Only called when we are the forwarder
* on the link (multi-dest frames) or the frame was destined for us.
*/
static void
trill_recv_local(trill_sock_t *tsock, mblk_t *mp, uint16_t ingressnick)
{
struct ether_header *inner_ethhdr;
/* LINTED: alignment */
inner_ethhdr = (struct ether_header *)mp->b_rptr;
DTRACE_PROBE1(trill__recv__local, struct ether_header *, inner_ethhdr);
DB_CKSUMFLAGS(mp) = 0;
/*
* Transmit the decapsulated frame on the link via Bridging.
* Bridging does source address learning and appropriate forwarding.
*/
bridge_trill_decaps(tsock->ts_link, mp, ingressnick);
KSPINCR(tks_decap);
}
/*
* Determines the outgoing link to reach a RBridge having the given nick
* Assumes caller has acquired the trill instance rwlock.
*/
static trill_sock_t *
find_trill_link(trill_inst_t *tip, datalink_id_t linkid)
{
trill_sock_t *tsp = NULL;
ASSERT(RW_LOCK_HELD(&tip->ti_rwlock));
for (tsp = list_head(&tip->ti_socklist); tsp != NULL;
tsp = list_next(&tip->ti_socklist, tsp)) {
if (tsp->ts_link != NULL && tsp->ts_link->bl_linkid == linkid) {
ASSERT(tsp->ts_link->bl_mh != NULL);
ASSERT(!(tsp->ts_flags & TSF_SHUTDOWN));
atomic_inc_uint(&tsp->ts_refs);
break;
}
}
return (tsp);
}
/*
* TRILL destination forwarding function. Transmits the TRILL data packet
* to the next-hop, adjacent RBridge. Consumes passed mblk_t.
*/
static void
trill_dest_fwd(trill_inst_t *tip, mblk_t *fwd_mp, uint16_t adj_nick,
boolean_t has_trill_hdr, boolean_t multidest, uint16_t dtnick)
{
trill_node_t *adj;
trill_sock_t *tsock = NULL;
trill_header_t *trillhdr;
struct ether_header *ethhdr;
int ethtype;
int ethhdrlen;
adj = trill_node_lookup(tip, adj_nick);
if (adj == NULL || ((tsock = adj->tn_tsp) == NULL))
goto dest_fwd_fail;
ASSERT(tsock->ts_link != NULL);
ASSERT(!(tsock->ts_flags & TSF_SHUTDOWN));
ASSERT(adj->tn_ni != NULL);
DTRACE_PROBE3(trill__dest__fwd, uint16_t, adj_nick, trill_node_t,
adj, trill_sock_t, tsock);
/*
* For broadcast links by using the dest address of
* the RBridge to forward the frame should result in
* savings. When the link is a bridged LAN or there are
* many end stations the frame will not always be flooded.
*/
fwd_mp = create_trill_header(tsock, fwd_mp, adj->tn_ni->tni_adjsnpa,
has_trill_hdr, multidest, tsock->ts_desigvlan, 0);
if (fwd_mp == NULL)
goto dest_fwd_fail;
/* LINTED: alignment */
ethhdr = (struct ether_header *)fwd_mp->b_rptr;
ethtype = ntohs(ethhdr->ether_type);
ASSERT(ethtype == ETHERTYPE_VLAN || ethtype == ETHERTYPE_TRILL);
/* Pullup Ethernet and TRILL header (w/o TRILL options) */
ethhdrlen = sizeof (struct ether_header) +
(ethtype == ETHERTYPE_VLAN ? sizeof (struct ether_vlan_extinfo):0);
if (!pullupmsg(fwd_mp, ethhdrlen + sizeof (trill_header_t)))
goto dest_fwd_fail;
/* LINTED: alignment */
trillhdr = (struct trill_header *)(fwd_mp->b_rptr + ethhdrlen);
/* Update TRILL header with ingress and egress nicks for new frames */
if (!has_trill_hdr) {
/* We are creating a new TRILL frame */
trillhdr->th_egressnick = (multidest ? dtnick:adj_nick);
rw_enter(&tip->ti_rwlock, RW_READER);
trillhdr->th_ingressnick = tip->ti_nick;
rw_exit(&tip->ti_rwlock);
if (!VALID_NICK(trillhdr->th_ingressnick))
goto dest_fwd_fail;
}
/* Set hop count and update header in packet */
ASSERT(trillhdr->th_hopcount != 0);
trillhdr->th_hopcount--;
/* Clear checksum flag and transmit frame on the link */
DB_CKSUMFLAGS(fwd_mp) = 0;
DTRACE_PROBE1(trill__dest__fwd__tx, trill_header_t *, &trillhdr);
fwd_mp = bridge_trill_output(tsock->ts_link, fwd_mp);
if (fwd_mp == NULL) {
KSPINCR(tks_sent);
KSPINCR(tks_forward);
} else {
freemsg(fwd_mp);
KSPINCR(tks_drops);
}
trill_node_unref(tip, adj);
return;
dest_fwd_fail:
if (adj != NULL)
trill_node_unref(tip, adj);
if (tsock != NULL)
KSPINCR(tks_drops);
freemsg(fwd_mp);
}
/*
* TRILL multi-destination forwarding. Transmits the packet to the adjacencies
* on the distribution tree determined by the egress nick. Source addr (saddr)
* is NULL for new TRILL packets originating from us.
*/
static void
trill_multidest_fwd(trill_inst_t *tip, mblk_t *mp, uint16_t egressnick,
uint16_t ingressnick, boolean_t is_trill_pkt, const uint8_t *saddr,
int inner_vlan, boolean_t free_mblk)
{
int idx;
uint16_t adjnick;
trill_node_t *dest;
trill_node_t *adj;
mblk_t *fwd_mp;
boolean_t nicksaved = B_FALSE;
uint16_t adjnicksaved;
/* Lookup the egress nick info, this is the DT root */
if ((dest = trill_node_lookup(tip, egressnick)) == NULL)
goto fail_multidest_fwd;
/* Send a copy to all our adjacencies on the DT root */
ASSERT(dest->tn_ni);
for (idx = 0; idx < dest->tn_ni->tni_adjcount; idx++) {
/* Check for a valid adjacency node */
adjnick = TNI_ADJNICK(dest->tn_ni, idx);
if (!VALID_NICK(adjnick) || ingressnick == adjnick ||
((adj = trill_node_lookup(tip, adjnick)) == NULL))
continue;
/* Do not forward back to adjacency that sent the pkt to us */
ASSERT(adj->tn_ni != NULL);
if ((saddr != NULL) &&
(memcmp(adj->tn_ni->tni_adjsnpa, saddr,
ETHERADDRL) == 0)) {
trill_node_unref(tip, adj);
continue;
}
/* Check if adj is marked as reaching inner VLAN downstream */
if ((inner_vlan != VLAN_ID_NONE) &&
!TRILL_VLANISSET(TNI_VLANFILTERMAP(dest->tn_ni, idx),
inner_vlan)) {
trill_node_unref(tip, adj);
DTRACE_PROBE4(trill__multi__dest__fwd__vlanfiltered,
uint16_t, adjnick, uint16_t, ingressnick,
uint16_t, egressnick, int, inner_vlan);
continue;
}
trill_node_unref(tip, adj);
/*
* Save the nick and look ahead to see if we should forward the
* frame to more adjacencies. We avoid doing a copy for this
* nick and use the passed mblk when we can consume the passed
* mblk.
*/
if (free_mblk && !nicksaved) {
adjnicksaved = adjnick;
nicksaved = B_TRUE;
continue;
}
fwd_mp = copymsg(mp);
if (fwd_mp == NULL)
break;
DTRACE_PROBE2(trill__multi__dest__fwd, uint16_t,
adjnick, uint16_t, ingressnick);
trill_dest_fwd(tip, fwd_mp, adjnick, is_trill_pkt,
B_TRUE, egressnick);
}
trill_node_unref(tip, dest);
if (nicksaved) {
ASSERT(free_mblk);
DTRACE_PROBE2(trill__multi__dest__fwd, uint16_t,
adjnicksaved, uint16_t, ingressnick);
trill_dest_fwd(tip, mp, adjnicksaved, is_trill_pkt,
B_TRUE, egressnick);
return;
}
fail_multidest_fwd:
DTRACE_PROBE2(trill__multi__dest__fwd__fail, uint16_t,
egressnick, uint16_t, ingressnick);
if (free_mblk) {
freemsg(mp);
}
}
/*
* TRILL data receive function. Forwards the received frame if necessary
* and also determines if the received frame should be consumed locally.
* Consumes passed mblk.
*/
static void
trill_recv(trill_sock_t *tsock, mblk_t *mp, const uint8_t *mpsaddr)
{
trill_header_t *trillhdr;
trill_node_t *dest = NULL;
trill_node_t *source = NULL;
trill_node_t *adj;
uint16_t ournick, adjnick, treeroot;
struct ether_header *ethhdr;
trill_inst_t *tip = tsock->ts_tip;
uint8_t srcaddr[ETHERADDRL];
size_t trillhdrlen;
int inner_vlan = VLAN_ID_NONE;
int tci;
int idx;
size_t min_size;
/* Copy Ethernet source address before modifying packet */
(void) memcpy(srcaddr, mpsaddr, ETHERADDRL);
/* Pull up TRILL header if necessary. */
min_size = sizeof (trill_header_t);
if ((MBLKL(mp) < min_size ||
!IS_P2ALIGNED(mp->b_rptr, TRILL_HDR_ALIGN)) &&
!pullupmsg(mp, min_size))
goto fail;
/* LINTED: alignment */
trillhdr = (trill_header_t *)mp->b_rptr;
if (trillhdr->th_version != TRILL_PROTOCOL_VERS) {
DTRACE_PROBE1(trill__recv__wrongversion,
trill_header_t *, trillhdr);
goto fail;
}
/* Drop if unknown or invalid nickname */
if (!VALID_NICK(trillhdr->th_egressnick) ||
!VALID_NICK(trillhdr->th_ingressnick)) {
DTRACE_PROBE1(trill__recv__invalidnick,
trill_header_t *, trillhdr);
goto fail;
}
rw_enter(&tip->ti_rwlock, RW_READER);
ournick = tip->ti_nick;
treeroot = tip->ti_treeroot;
rw_exit(&tip->ti_rwlock);
/* Drop if we received a packet with our nick as ingress */
if (trillhdr->th_ingressnick == ournick)
goto fail;
/* Re-pull any TRILL options and inner Ethernet header */
min_size += GET_TRILL_OPTS_LEN(trillhdr) * sizeof (uint32_t) +
sizeof (struct ether_header);
if (MBLKL(mp) < min_size) {
if (!pullupmsg(mp, min_size))
goto fail;
/* LINTED: alignment */
trillhdr = (trill_header_t *)mp->b_rptr;
}
trillhdrlen = sizeof (trill_header_t) +
(GET_TRILL_OPTS_LEN(trillhdr) * sizeof (uint32_t));
/*
* Get the inner Ethernet header, plus the inner VLAN header if there
* is one.
*/
/* LINTED: alignment */
ethhdr = (struct ether_header *)(mp->b_rptr + trillhdrlen);
if (ethhdr->ether_type == htons(ETHERTYPE_VLAN)) {
min_size += sizeof (struct ether_vlan_extinfo);
if (MBLKL(mp) < min_size) {
if (!pullupmsg(mp, min_size))
goto fail;
/* LINTED: alignment */
trillhdr = (trill_header_t *)mp->b_rptr;
/* LINTED: alignment */
ethhdr = (struct ether_header *)(mp->b_rptr +
trillhdrlen);
}
tci = ntohs(((struct ether_vlan_header *)ethhdr)->ether_tci);
inner_vlan = VLAN_ID(tci);
}
/* Known/single destination forwarding. */
if (!trillhdr->th_multidest) {
/* Inner MacDA must be unicast */
if (ethhdr->ether_dhost.ether_addr_octet[0] & 1)
goto fail;
/* Ingress and Egress nicks must be different */
if (trillhdr->th_egressnick == trillhdr->th_ingressnick)
goto fail;
DTRACE_PROBE1(trill__recv__singledest,
trill_header_t *, trillhdr);
if (trillhdr->th_egressnick == ournick) {
mp->b_rptr += trillhdrlen;
trill_recv_local(tsock, mp, trillhdr->th_ingressnick);
} else if (trillhdr->th_hopcount > 0) {
trill_dest_fwd(tip, mp, trillhdr->th_egressnick,
B_TRUE, B_FALSE, RBRIDGE_NICKNAME_NONE);
} else {
goto fail;
}
return;
}
/*
* Multi-destination frame: perform checks verifying we have
* received a valid multi-destination frame before receiving the
* frame locally and forwarding the frame to other RBridges.
*
* Check if we received this multi-destination frame on a
* adjacency in the distribution tree indicated by the frame's
* egress nickname.
*/
if ((dest = trill_node_lookup(tip, trillhdr->th_egressnick)) == NULL)
goto fail;
for (idx = 0; idx < dest->tn_ni->tni_adjcount; idx++) {
adjnick = TNI_ADJNICK(dest->tn_ni, idx);
if ((adj = trill_node_lookup(tip, adjnick)) == NULL)
continue;
if (memcmp(adj->tn_ni->tni_adjsnpa, srcaddr, ETHERADDRL) == 0) {
trill_node_unref(tip, adj);
break;
}
trill_node_unref(tip, adj);
}
if (idx >= dest->tn_ni->tni_adjcount) {
DTRACE_PROBE2(trill__recv__multidest__adjcheckfail,
trill_header_t *, trillhdr, trill_node_t *, dest);
goto fail;
}
/*
* Reverse path forwarding check. Check if the ingress RBridge
* that has forwarded the frame advertised the use of the
* distribution tree specified in the egress nick.
*/
if ((source = trill_node_lookup(tip, trillhdr->th_ingressnick)) == NULL)
goto fail;
for (idx = 0; idx < source->tn_ni->tni_dtrootcount; idx++) {
if (TNI_DTROOTNICK(source->tn_ni, idx) ==
trillhdr->th_egressnick)
break;
}
if (idx >= source->tn_ni->tni_dtrootcount) {
/*
* Allow receipt of forwarded frame with the highest
* tree root RBridge as the egress RBridge when the
* ingress RBridge has not advertised the use of any
* distribution trees.
*/
if (source->tn_ni->tni_dtrootcount != 0 ||
trillhdr->th_egressnick != treeroot) {
DTRACE_PROBE3(
trill__recv__multidest__rpfcheckfail,
trill_header_t *, trillhdr, trill_node_t *,
source, trill_inst_t *, tip);
goto fail;
}
}
/* Check hop count before doing any forwarding */
if (trillhdr->th_hopcount == 0)
goto fail;
/* Forward frame using the distribution tree specified by egress nick */
DTRACE_PROBE2(trill__recv__multidest, trill_header_t *,
trillhdr, trill_node_t *, source);
trill_node_unref(tip, source);
trill_node_unref(tip, dest);
/* Tell forwarding not to free if we're the link forwarder. */
trill_multidest_fwd(tip, mp, trillhdr->th_egressnick,
trillhdr->th_ingressnick, B_TRUE, srcaddr, inner_vlan,
B_FALSE);
/*
* Send de-capsulated frame locally if we are the link forwarder (also
* does bridge learning).
*/
mp->b_rptr += trillhdrlen;
trill_recv_local(tsock, mp, trillhdr->th_ingressnick);
KSPINCR(tks_recv);
return;
fail:
DTRACE_PROBE2(trill__recv__multidest__fail, mblk_t *, mp,
trill_sock_t *, tsock);
if (dest != NULL)
trill_node_unref(tip, dest);
if (source != NULL)
trill_node_unref(tip, source);
freemsg(mp);
KSPINCR(tks_drops);
}
static void
trill_stop_recv(trill_sock_t *tsock)
{
mutex_enter(&tsock->ts_socklock);
stop_retry:
if (tsock->ts_state == TS_UNBND || tsock->ts_link == NULL) {
mutex_exit(&tsock->ts_socklock);
return;
}
/*
* If another thread is closing the socket then wait. Our callers
* expect us to return only after the socket is closed.
*/
if (tsock->ts_flags & TSF_CLOSEWAIT) {
cv_wait(&tsock->ts_sockclosewait, &tsock->ts_socklock);
goto stop_retry;
}
/*
* Set state and flags to block new bind or close calls
* while we close the socket.
*/
tsock->ts_flags |= TSF_CLOSEWAIT;
/* Wait until all AF_TRILL socket transmit operations are done */
while (tsock->ts_sockthreadcount > 0)
cv_wait(&tsock->ts_sockthreadwait, &tsock->ts_socklock);
/*
* We are guaranteed to be the only thread closing on the
* socket while the TSF_CLOSEWAIT flag is set, all others cv_wait
* for us to finish.
*/
ASSERT(tsock->ts_link != NULL);
if (tsock->ts_ksp != NULL)
kstat_delete(tsock->ts_ksp);
/*
* Release lock before bridge_trill_lnunref to prevent deadlock
* between trill_ctrl_input thread waiting to acquire ts_socklock
* and bridge_trill_lnunref waiting for the trill thread to finish.
*/
mutex_exit(&tsock->ts_socklock);
/*
* Release TRILL link reference from Bridging. On return from
* bridge_trill_lnunref we can be sure there are no active TRILL data
* threads for this link.
*/
bridge_trill_lnunref(tsock->ts_link);
/* Set socket as unbound & wakeup threads waiting for socket to close */
mutex_enter(&tsock->ts_socklock);
ASSERT(tsock->ts_link != NULL);
tsock->ts_link = NULL;
tsock->ts_state = TS_UNBND;
tsock->ts_flags &= ~TSF_CLOSEWAIT;
cv_broadcast(&tsock->ts_sockclosewait);
mutex_exit(&tsock->ts_socklock);
}
static int
trill_start_recv(trill_sock_t *tsock, const struct sockaddr *sa, socklen_t len)
{
struct sockaddr_dl *lladdr = (struct sockaddr_dl *)sa;
datalink_id_t linkid;
int err = 0;
if (len != sizeof (*lladdr))
return (EINVAL);
mutex_enter(&tsock->ts_socklock);
if (tsock->ts_tip == NULL || tsock->ts_state != TS_UNBND) {
err = EINVAL;
goto bind_error;
}
if (tsock->ts_flags & TSF_CLOSEWAIT || tsock->ts_link != NULL) {
err = EBUSY;
goto bind_error;
}
(void) memcpy(&(tsock->ts_lladdr), lladdr,
sizeof (struct sockaddr_dl));
(void) memcpy(&linkid, tsock->ts_lladdr.sdl_data,
sizeof (datalink_id_t));
tsock->ts_link = bridge_trill_lnref(tsock->ts_tip->ti_binst,
linkid, tsock);
if (tsock->ts_link == NULL) {
err = EINVAL;
goto bind_error;
}
trill_kstats_init(tsock, tsock->ts_tip->ti_bridgename);
tsock->ts_state = TS_IDLE;
bind_error:
mutex_exit(&tsock->ts_socklock);
return (err);
}
static int
trill_do_unbind(trill_sock_t *tsock)
{
/* If a bind has not been done, we can't unbind. */
if (tsock->ts_state != TS_IDLE)
return (EINVAL);
trill_stop_recv(tsock);
return (0);
}
static void
trill_instance_unref(trill_inst_t *tip)
{
rw_enter(&trill_inst_rwlock, RW_WRITER);
rw_enter(&tip->ti_rwlock, RW_WRITER);
if (atomic_dec_uint_nv(&tip->ti_refs) == 0) {
list_remove(&trill_inst_list, tip);
rw_exit(&tip->ti_rwlock);
rw_exit(&trill_inst_rwlock);
if (tip->ti_binst != NULL)
bridge_trill_brunref(tip->ti_binst);
list_destroy(&tip->ti_socklist);
rw_destroy(&tip->ti_rwlock);
kmem_free(tip, sizeof (*tip));
} else {
rw_exit(&tip->ti_rwlock);
rw_exit(&trill_inst_rwlock);
}
}
/*
* This is called when the bridge module receives a TRILL-encapsulated packet
* on a given link or a packet identified as "TRILL control." We must verify
* that it's for us (it almost certainly will be), and then either decapsulate
* (if it's to our nickname), forward (if it's to someone else), or send up one
* of the sockets (if it's control traffic).
*
* Sadly, on Ethernet, the control traffic is identified by Outer.MacDA, and
* not by TRILL header information.
*/
static void
trill_recv_pkt_cb(void *lptr, bridge_link_t *blp, mac_resource_handle_t rsrc,
mblk_t *mp, mac_header_info_t *hdr_info)
{
trill_sock_t *tsock = lptr;
_NOTE(ARGUNUSED(rsrc));
ASSERT(tsock->ts_tip != NULL);
ASSERT(tsock->ts_link != NULL);
ASSERT(!(tsock->ts_flags & TSF_SHUTDOWN));
/*
* Only receive packet if the source address is not multicast (which is
* bogus).
*/
if (hdr_info->mhi_saddr[0] & 1)
goto discard;
/*
* Check if this is our own packet reflected back. It should not be.
*/
if (bcmp(hdr_info->mhi_saddr, blp->bl_local_mac, ETHERADDRL) == 0)
goto discard;
/* Only receive unicast packet if addressed to us */
if (hdr_info->mhi_dsttype == MAC_ADDRTYPE_UNICAST &&
bcmp(hdr_info->mhi_daddr, blp->bl_local_mac, ETHERADDRL) != 0)
goto discard;
if (hdr_info->mhi_bindsap == ETHERTYPE_TRILL) {
/* TRILL data packets */
trill_recv(tsock, mp, hdr_info->mhi_saddr);
} else {
/* Design constraint for cheap IS-IS/BPDU comparison */
ASSERT(all_isis_rbridges[4] != bridge_group_address[4]);
/* Send received control packet upstream */
trill_ctrl_input(tsock, mp, hdr_info->mhi_saddr,
hdr_info->mhi_daddr[4] == all_isis_rbridges[4] ?
hdr_info->mhi_tci : TRILL_TCI_BPDU);
}
return;
discard:
freemsg(mp);
KSPINCR(tks_drops);
}
/*
* This is called when the bridge module discovers that the destination address
* for a packet is not local -- it's through some remote node. We must verify
* that the remote node isn't our nickname (it shouldn't be), add a TRILL
* header, and then use the IS-IS data to determine which link and which
* next-hop RBridge should be used for output. We then transmit on that link.
*
* The egress_nick is RBRIDGE_NICKNAME_NONE for the "unknown destination" case.
*/
static void
trill_encap_pkt_cb(void *lptr, bridge_link_t *blp, mac_header_info_t *hdr_info,
mblk_t *mp, uint16_t egress_nick)
{
uint16_t ournick;
uint16_t dtnick;
trill_node_t *self = NULL;
trill_sock_t *tsock = lptr;
trill_inst_t *tip = tsock->ts_tip;
int vlan = VLAN_ID_NONE;
_NOTE(ARGUNUSED(blp));
ASSERT(hdr_info->mhi_bindsap != ETHERTYPE_TRILL);
/* egress_nick = RBRIDGE_NICKNAME_NONE is valid */
if (egress_nick != RBRIDGE_NICKNAME_NONE && !VALID_NICK(egress_nick))
goto discard;
/* Check if our own nick is valid before we do any forwarding */
rw_enter(&tip->ti_rwlock, RW_READER);
ournick = tip->ti_nick;
dtnick = tip->ti_treeroot;
rw_exit(&tip->ti_rwlock);
if (!VALID_NICK(ournick))
goto discard;
/*
* For Multi-Destination forwarding determine our choice of
* root distribution tree. If we didn't choose a distribution
* tree (dtroots_count=0) then we use the highest priority tree
* root (t_treeroot) else we drop the packet without forwarding.
*/
if (egress_nick == RBRIDGE_NICKNAME_NONE) {
if ((self = trill_node_lookup(tip, ournick)) == NULL)
goto discard;
/*
* Use the first DT configured for now. In future we
* should have DT selection code here.
*/
if (self->tn_ni->tni_dtrootcount > 0) {
dtnick = TNI_DTROOTNICK(self->tn_ni, 0);
}
trill_node_unref(tip, self);
if (!VALID_NICK(dtnick)) {
DTRACE_PROBE(trill__fwd__packet__nodtroot);
goto discard;
}
}
/*
* Retrieve VLAN ID of the native frame used for VLAN
* pruning of multi-destination frames.
*/
if (hdr_info->mhi_istagged) {
vlan = VLAN_ID(hdr_info->mhi_tci);
}
DTRACE_PROBE2(trill__fwd__packet, mac_header_info_t *, hdr_info,
uint16_t, egress_nick);
if (egress_nick == RBRIDGE_NICKNAME_NONE) {
trill_multidest_fwd(tip, mp, dtnick,
ournick, B_FALSE, NULL, vlan, B_TRUE);
} else {
trill_dest_fwd(tip, mp, egress_nick, B_FALSE, B_FALSE,
RBRIDGE_NICKNAME_NONE);
}
KSPINCR(tks_encap);
return;
discard:
freemsg(mp);
}
/*
* This is called when the bridge module has completely torn down a bridge
* instance and all of the attached links. We need to make the TRILL instance
* go away at this point.
*/
static void
trill_br_dstr_cb(void *bptr, bridge_inst_t *bip)
{
trill_inst_t *tip = bptr;
_NOTE(ARGUNUSED(bip));
rw_enter(&tip->ti_rwlock, RW_WRITER);
if (tip->ti_binst != NULL)
bridge_trill_brunref(tip->ti_binst);
tip->ti_binst = NULL;
rw_exit(&tip->ti_rwlock);
}
/*
* This is called when the bridge module is tearing down a link, but before the
* actual tear-down starts. When this function returns, we must make sure that
* we will not initiate any new transmits on this link.
*/
static void
trill_ln_dstr_cb(void *lptr, bridge_link_t *blp)
{
trill_sock_t *tsock = lptr;
_NOTE(ARGUNUSED(blp));
trill_stop_recv(tsock);
}
static void
trill_init(void)
{
list_create(&trill_inst_list, sizeof (trill_inst_t),
offsetof(trill_inst_t, ti_instnode));
rw_init(&trill_inst_rwlock, NULL, RW_DRIVER, NULL);
bridge_trill_register_cb(trill_recv_pkt_cb, trill_encap_pkt_cb,
trill_br_dstr_cb, trill_ln_dstr_cb);
}
static void
trill_fini(void)
{
bridge_trill_register_cb(NULL, NULL, NULL, NULL);
rw_destroy(&trill_inst_rwlock);
list_destroy(&trill_inst_list);
}
/* Loadable module configuration entry points */
int
_init(void)
{
int rc;
trill_init();
if ((rc = mod_install(&ml)) != 0)
trill_fini();
return (rc);
}
int
_info(struct modinfo *modinfop)
{
return (mod_info(&ml, modinfop));
}
int
_fini(void)
{
int rc;
rw_enter(&trill_inst_rwlock, RW_READER);
rc = list_is_empty(&trill_inst_list) ? 0 : EBUSY;
rw_exit(&trill_inst_rwlock);
if (rc == 0 && ((rc = mod_remove(&ml)) == 0))
trill_fini();
return (rc);
}
static void
trill_kstats_init(trill_sock_t *tsock, const char *bname)
{
int i;
char kstatname[KSTAT_STRLEN];
kstat_named_t *knt;
static const char *sock_kstats_list[] = { TRILL_KSSOCK_NAMES };
char link_name[MAXNAMELEN];
int num;
int err;
bzero(link_name, sizeof (link_name));
if ((err = dls_mgmt_get_linkinfo(tsock->ts_link->bl_linkid, link_name,
NULL, NULL, NULL)) != 0) {
cmn_err(CE_WARN, "%s: trill_kstats_init: error %d retrieving"
" linkinfo for linkid:%d", "trill", err,
tsock->ts_link->bl_linkid);
return;
}
bzero(kstatname, sizeof (kstatname));
(void) snprintf(kstatname, sizeof (kstatname), "%s-%s",
bname, link_name);
num = sizeof (sock_kstats_list) / sizeof (*sock_kstats_list);
for (i = 0; i < num; i++) {
knt = (kstat_named_t *)&(tsock->ts_kstats);
kstat_named_init(&knt[i], sock_kstats_list[i],
KSTAT_DATA_UINT64);
}
tsock->ts_ksp = kstat_create_zone("trill", 0, kstatname, "sock",
KSTAT_TYPE_NAMED, num, KSTAT_FLAG_VIRTUAL, GLOBAL_ZONEID);
if (tsock->ts_ksp != NULL) {
tsock->ts_ksp->ks_data = &tsock->ts_kstats;
kstat_install(tsock->ts_ksp);
}
}
static trill_sock_t *
trill_do_open(int flags)
{
trill_sock_t *tsock;
int kmflag = ((flags & SOCKET_NOSLEEP)) ? KM_NOSLEEP:KM_SLEEP;
tsock = kmem_zalloc(sizeof (trill_sock_t), kmflag);
if (tsock != NULL) {
tsock->ts_state = TS_UNBND;
tsock->ts_refs++;
mutex_init(&tsock->ts_socklock, NULL, MUTEX_DRIVER, NULL);
cv_init(&tsock->ts_sockthreadwait, NULL, CV_DRIVER, NULL);
cv_init(&tsock->ts_sockclosewait, NULL, CV_DRIVER, NULL);
}
return (tsock);
}
static int
trill_find_bridge(trill_sock_t *tsock, const char *bname, boolean_t can_create)
{
trill_inst_t *tip, *newtip = NULL;
/* Allocate some memory (speculatively) before taking locks */
if (can_create)
newtip = kmem_zalloc(sizeof (*tip), KM_NOSLEEP);
rw_enter(&trill_inst_rwlock, RW_WRITER);
for (tip = list_head(&trill_inst_list); tip != NULL;
tip = list_next(&trill_inst_list, tip)) {
if (strcmp(tip->ti_bridgename, bname) == 0)
break;
}
if (tip == NULL) {
if (!can_create || newtip == NULL) {
rw_exit(&trill_inst_rwlock);
return (can_create ? ENOMEM : ENOENT);
}
tip = newtip;
newtip = NULL;
(void) strcpy(tip->ti_bridgename, bname);
/* Register TRILL instance with bridging */
tip->ti_binst = bridge_trill_brref(bname, tip);
if (tip->ti_binst == NULL) {
rw_exit(&trill_inst_rwlock);
kmem_free(tip, sizeof (*tip));
return (ENOENT);
}
rw_init(&tip->ti_rwlock, NULL, RW_DRIVER, NULL);
list_create(&tip->ti_socklist, sizeof (trill_sock_t),
offsetof(trill_sock_t, ts_socklistnode));
list_insert_tail(&trill_inst_list, tip);
}
atomic_inc_uint(&tip->ti_refs);
rw_exit(&trill_inst_rwlock);
/* If we didn't need the preallocated memory, then discard now. */
if (newtip != NULL)
kmem_free(newtip, sizeof (*newtip));
rw_enter(&tip->ti_rwlock, RW_WRITER);
list_insert_tail(&(tip->ti_socklist), tsock);
tsock->ts_tip = tip;
rw_exit(&tip->ti_rwlock);
return (0);
}
static void
trill_clear_bridge(trill_sock_t *tsock)
{
trill_inst_t *tip;
if ((tip = tsock->ts_tip) == NULL)
return;
rw_enter(&tip->ti_rwlock, RW_WRITER);
list_remove(&tip->ti_socklist, tsock);
if (list_is_empty(&tip->ti_socklist))
trill_del_all(tip, B_TRUE);
rw_exit(&tip->ti_rwlock);
}
static void
trill_sock_unref(trill_sock_t *tsock)
{
if (atomic_dec_uint_nv(&tsock->ts_refs) == 0) {
mutex_destroy(&tsock->ts_socklock);
cv_destroy(&tsock->ts_sockthreadwait);
cv_destroy(&tsock->ts_sockclosewait);
kmem_free(tsock, sizeof (trill_sock_t));
}
}
static void
trill_do_close(trill_sock_t *tsock)
{
trill_inst_t *tip;
tip = tsock->ts_tip;
trill_stop_recv(tsock);
/* Remove socket from TRILL instance socket list */
trill_clear_bridge(tsock);
tsock->ts_flags |= TSF_SHUTDOWN;
trill_sock_unref(tsock);
if (tip != NULL)
trill_instance_unref(tip);
}
static void
trill_del_all(trill_inst_t *tip, boolean_t lockheld)
{
int i;
if (!lockheld)
rw_enter(&tip->ti_rwlock, RW_WRITER);
for (i = RBRIDGE_NICKNAME_MIN; i < RBRIDGE_NICKNAME_MAX; i++) {
if (tip->ti_nodes[i] != NULL)
(void) trill_del_nick(tip, i, B_TRUE);
}
if (!lockheld)
rw_exit(&tip->ti_rwlock);
}
static void
trill_node_free(trill_node_t *nick_entry)
{
trill_nickinfo_t *tni;
tni = nick_entry->tn_ni;
kmem_free(tni, TNI_TOTALSIZE(tni));
kmem_free(nick_entry, sizeof (trill_node_t));
}
static void
trill_node_unref(trill_inst_t *tip, trill_node_t *tnp)
{
if (atomic_dec_uint_nv(&tnp->tn_refs) == 0) {
if (tnp->tn_tsp != NULL)
trill_sock_unref(tnp->tn_tsp);
trill_node_free(tnp);
(void) atomic_dec_uint_nv(&tip->ti_nodecount);
}
}
static trill_node_t *
trill_node_lookup(trill_inst_t *tip, uint16_t nick)
{
trill_node_t *nick_entry;
if (!VALID_NICK(nick))
return (NULL);
rw_enter(&tip->ti_rwlock, RW_READER);
nick_entry = tip->ti_nodes[nick];
if (nick_entry != NULL) {
atomic_inc_uint(&nick_entry->tn_refs);
}
rw_exit(&tip->ti_rwlock);
return (nick_entry);
}
static int
trill_del_nick(trill_inst_t *tip, uint16_t nick, boolean_t lockheld)
{
trill_node_t *nick_entry;
int rc = ENOENT;
if (!lockheld)
rw_enter(&tip->ti_rwlock, RW_WRITER);
if (VALID_NICK(nick)) {
nick_entry = tip->ti_nodes[nick];
if (nick_entry != NULL) {
trill_node_unref(tip, nick_entry);
tip->ti_nodes[nick] = NULL;
rc = 0;
}
}
if (!lockheld)
rw_exit(&tip->ti_rwlock);
return (rc);
}
static int
trill_add_nick(trill_inst_t *tip, void *arg, boolean_t self, int mode)
{
uint16_t nick;
int size;
trill_node_t *tnode;
trill_nickinfo_t tnihdr;
/* First make sure we have at least the header available */
if (ddi_copyin(arg, &tnihdr, sizeof (trill_nickinfo_t), mode) != 0)
return (EFAULT);
nick = tnihdr.tni_nick;
if (!VALID_NICK(nick)) {
DTRACE_PROBE1(trill__add__nick__bad, trill_nickinfo_t *,
&tnihdr);
return (EINVAL);
}
size = TNI_TOTALSIZE(&tnihdr);
if (size > TNI_MAXSIZE)
return (EINVAL);
tnode = kmem_zalloc(sizeof (trill_node_t), KM_SLEEP);
tnode->tn_ni = kmem_zalloc(size, KM_SLEEP);
if (ddi_copyin(arg, tnode->tn_ni, size, mode) != 0) {
kmem_free(tnode->tn_ni, size);
kmem_free(tnode, sizeof (trill_node_t));
return (EFAULT);
}
tnode->tn_refs++;
rw_enter(&tip->ti_rwlock, RW_WRITER);
if (tip->ti_nodes[nick] != NULL)
(void) trill_del_nick(tip, nick, B_TRUE);
if (self) {
tip->ti_nick = nick;
} else {
tnode->tn_tsp = find_trill_link(tip,
tnode->tn_ni->tni_linkid);
}
DTRACE_PROBE2(trill__add__nick, trill_node_t *, tnode,
uint16_t, nick);
tip->ti_nodes[nick] = tnode;
tip->ti_nodecount++;
rw_exit(&tip->ti_rwlock);
return (0);
}
static int
trill_do_ioctl(trill_sock_t *tsock, int cmd, void *arg, int mode)
{
int error = 0;
trill_inst_t *tip = tsock->ts_tip;
switch (cmd) {
case TRILL_DESIGVLAN: {
uint16_t desigvlan;
if (ddi_copyin(arg, &desigvlan, sizeof (desigvlan), mode) != 0)
return (EFAULT);
tsock->ts_desigvlan = desigvlan;
break;
}
case TRILL_VLANFWDER: {
uint8_t vlans[TRILL_VLANS_ARRSIZE];
if (tsock->ts_link == NULL)
return (EINVAL);
if ((ddi_copyin(arg, vlans, sizeof (vlans), mode)) != 0)
return (EFAULT);
bridge_trill_setvlans(tsock->ts_link, vlans);
break;
}
case TRILL_SETNICK:
if (tip == NULL)
return (EINVAL);
error = trill_add_nick(tip, arg, B_TRUE, mode);
break;
case TRILL_GETNICK:
if (tip == NULL)
return (EINVAL);
rw_enter(&tip->ti_rwlock, RW_READER);
if (ddi_copyout(&tip->ti_nick, arg, sizeof (tip->ti_nick),
mode) != 0)
error = EFAULT;
rw_exit(&tip->ti_rwlock);
break;
case TRILL_ADDNICK:
if (tip == NULL)
break;
error = trill_add_nick(tip, arg, B_FALSE, mode);
break;
case TRILL_DELNICK: {
uint16_t delnick;
if (tip == NULL)
break;
if (ddi_copyin(arg, &delnick, sizeof (delnick), mode) != 0)
return (EFAULT);
error = trill_del_nick(tip, delnick, B_FALSE);
break;
}
case TRILL_DELALL:
if (tip == NULL)
break;
trill_del_all(tip, B_FALSE);
break;
case TRILL_TREEROOT: {
uint16_t treeroot;
if (tip == NULL)
break;
if (ddi_copyin(arg, &treeroot, sizeof (treeroot), mode) != 0)
return (EFAULT);
if (!VALID_NICK(treeroot))
return (EINVAL);
rw_enter(&tip->ti_rwlock, RW_WRITER);
tip->ti_treeroot = treeroot;
rw_exit(&tip->ti_rwlock);
break;
}
case TRILL_HWADDR:
if (tsock->ts_link == NULL)
break;
if (ddi_copyout(tsock->ts_link->bl_local_mac, arg, ETHERADDRL,
mode) != 0)
return (EFAULT);
break;
case TRILL_NEWBRIDGE: {
char bname[MAXLINKNAMELEN];
if (tsock->ts_state != TS_UNBND)
return (ENOTSUP);
/* ts_tip can only be set once */
if (tip != NULL)
return (EEXIST);
if (ddi_copyin(arg, bname, sizeof (bname), mode) != 0)
return (EFAULT);
bname[MAXLINKNAMELEN-1] = '\0';
error = trill_find_bridge(tsock, bname, B_TRUE);
break;
}
case TRILL_GETBRIDGE: {
char bname[MAXLINKNAMELEN];
/* ts_tip can only be set once */
if (tip != NULL)
return (EEXIST);
if (ddi_copyin(arg, bname, sizeof (bname), mode) != 0)
return (EFAULT);
bname[MAXLINKNAMELEN - 1] = '\0';
error = trill_find_bridge(tsock, bname, B_FALSE);
break;
}
case TRILL_LISTNICK: {
trill_listnick_t tln;
trill_node_t *tnp;
trill_nickinfo_t *tnip;
uint16_t nick;
if (tip == NULL)
return (EINVAL);
if (ddi_copyin(arg, &tln, sizeof (tln), mode) != 0)
return (EFAULT);
nick = tln.tln_nick;
if (nick >= RBRIDGE_NICKNAME_MAX) {
error = EINVAL;
break;
}
rw_enter(&tip->ti_rwlock, RW_READER);
while (++nick < RBRIDGE_NICKNAME_MAX) {
if ((tnp = tip->ti_nodes[nick]) != NULL) {
tnip = tnp->tn_ni;
ASSERT(nick == tnip->tni_nick);
tln.tln_nick = nick;
bcopy(tnip->tni_adjsnpa, tln.tln_nexthop,
ETHERADDRL);
tln.tln_ours = nick == tip->ti_nick;
if (tln.tln_ours || tnp->tn_tsp == NULL) {
tln.tln_linkid =
DATALINK_INVALID_LINKID;
} else {
tln.tln_linkid =
tnp->tn_tsp->ts_link->bl_linkid;
}
break;
}
}
rw_exit(&tip->ti_rwlock);
if (nick >= RBRIDGE_NICKNAME_MAX)
bzero(&tln, sizeof (tln));
if (ddi_copyout(&tln, arg, sizeof (tln), mode) != 0)
return (EFAULT);
break;
}
/*
* Port flush: this is used when we lose AF on a port. We must discard
* all regular bridge forwarding entries on this port with the
* indicated VLAN.
*/
case TRILL_PORTFLUSH: {
uint16_t vlan = (uint16_t)(uintptr_t)arg;
if (tsock->ts_link == NULL)
return (EINVAL);
bridge_trill_flush(tsock->ts_link, vlan, B_FALSE);
break;
}
/*
* Nick flush: this is used when we lose AF on a port. We must discard
* all bridge TRILL forwarding entries on this port with the indicated
* VLAN.
*/
case TRILL_NICKFLUSH: {
uint16_t vlan = (uint16_t)(uintptr_t)arg;
if (tsock->ts_link == NULL)
return (EINVAL);
bridge_trill_flush(tsock->ts_link, vlan, B_TRUE);
break;
}
case TRILL_GETMTU:
if (tsock->ts_link == NULL)
break;
if (ddi_copyout(&tsock->ts_link->bl_maxsdu, arg,
sizeof (uint_t), mode) != 0)
return (EFAULT);
break;
default:
error = ENOTSUP;
break;
}
return (error);
}
/*
* Sends received packet back upstream on the TRILL socket.
* Consumes passed mblk_t.
*/
static void
trill_ctrl_input(trill_sock_t *tsock, mblk_t *mp, const uint8_t *saddr,
uint16_t tci)
{
int udi_size;
mblk_t *mp1;
struct T_unitdata_ind *tudi;
struct sockaddr_dl *sdl;
char *lladdr;
int error;
ASSERT(!(tsock->ts_flags & TSF_SHUTDOWN));
if (tsock->ts_flow_ctrld) {
freemsg(mp);
KSPINCR(tks_drops);
return;
}
udi_size = sizeof (struct T_unitdata_ind) +
sizeof (struct sockaddr_dl);
mp1 = allocb(udi_size, BPRI_MED);
if (mp1 == NULL) {
freemsg(mp);
KSPINCR(tks_drops);
return;
}
mp1->b_cont = mp;
mp = mp1;
mp->b_datap->db_type = M_PROTO;
/* LINTED: alignment */
tudi = (struct T_unitdata_ind *)mp->b_rptr;
mp->b_wptr = (uchar_t *)tudi + udi_size;
tudi->PRIM_type = T_UNITDATA_IND;
tudi->SRC_length = sizeof (struct sockaddr_dl);
tudi->SRC_offset = sizeof (struct T_unitdata_ind);
tudi->OPT_length = 0;
tudi->OPT_offset = sizeof (struct T_unitdata_ind) +
sizeof (struct sockaddr_dl);
/* Information of the link on which packet was received. */
sdl = (struct sockaddr_dl *)&tudi[1];
(void) memset(sdl, 0, sizeof (struct sockaddr_dl));
sdl->sdl_family = AF_TRILL;
/* LINTED: alignment */
*(datalink_id_t *)sdl->sdl_data = tsock->ts_link->bl_linkid;
sdl->sdl_nlen = sizeof (tsock->ts_link->bl_linkid);
lladdr = LLADDR(sdl);
(void) memcpy(lladdr, saddr, ETHERADDRL);
lladdr += ETHERADDRL;
sdl->sdl_alen = ETHERADDRL;
/* LINTED: alignment */
*(uint16_t *)lladdr = tci;
sdl->sdl_slen = sizeof (uint16_t);
DTRACE_PROBE2(trill__ctrl__input, trill_sock_t *, tsock, mblk_t *, mp);
(*tsock->ts_conn_upcalls->su_recv)(tsock->ts_conn_upper_handle,
mp, msgdsize(mp), 0, &error, NULL);
if (error == ENOSPC) {
mutex_enter(&tsock->ts_socklock);
(*tsock->ts_conn_upcalls->su_recv)(tsock->ts_conn_upper_handle,
NULL, 0, 0, &error, NULL);
if (error == ENOSPC)
tsock->ts_flow_ctrld = B_TRUE;
mutex_exit(&tsock->ts_socklock);
KSPINCR(tks_drops);
} else if (error != 0) {
KSPINCR(tks_drops);
} else {
KSPINCR(tks_recv);
}
DTRACE_PROBE2(trill__ctrl__input__done, trill_sock_t *,
tsock, int, error);
}
/* ARGSUSED */
static void
trill_activate(sock_lower_handle_t proto_handle,
sock_upper_handle_t sock_handle, sock_upcalls_t *sock_upcalls,
int flags, cred_t *cr)
{
trill_sock_t *tsock = (trill_sock_t *)proto_handle;
struct sock_proto_props sopp;
tsock->ts_conn_upcalls = sock_upcalls;
tsock->ts_conn_upper_handle = sock_handle;
sopp.sopp_flags = SOCKOPT_WROFF | SOCKOPT_RCVHIWAT |
SOCKOPT_RCVLOWAT | SOCKOPT_MAXADDRLEN | SOCKOPT_MAXPSZ |
SOCKOPT_MAXBLK | SOCKOPT_MINPSZ;
sopp.sopp_wroff = 0;
sopp.sopp_rxhiwat = SOCKET_RECVHIWATER;
sopp.sopp_rxlowat = SOCKET_RECVLOWATER;
sopp.sopp_maxaddrlen = sizeof (struct sockaddr_dl);
sopp.sopp_maxpsz = INFPSZ;
sopp.sopp_maxblk = INFPSZ;
sopp.sopp_minpsz = 0;
(*tsock->ts_conn_upcalls->su_set_proto_props)(
tsock->ts_conn_upper_handle, &sopp);
}
/* ARGSUSED */
static int
trill_close(sock_lower_handle_t proto_handle, int flags, cred_t *cr)
{
trill_sock_t *tsock = (trill_sock_t *)proto_handle;
trill_do_close(tsock);
return (0);
}
/* ARGSUSED */
static int
trill_bind(sock_lower_handle_t proto_handle, struct sockaddr *sa,
socklen_t len, cred_t *cr)
{
int error;
trill_sock_t *tsock = (trill_sock_t *)proto_handle;
if (sa == NULL)
error = trill_do_unbind(tsock);
else
error = trill_start_recv(tsock, sa, len);
return (error);
}
/* ARGSUSED */
static int
trill_send(sock_lower_handle_t proto_handle, mblk_t *mp, struct nmsghdr *msg,
cred_t *cr)
{
trill_sock_t *tsock = (trill_sock_t *)proto_handle;
struct sockaddr_dl *laddr;
uint16_t tci;
ASSERT(DB_TYPE(mp) == M_DATA);
ASSERT(!(tsock->ts_flags & TSF_SHUTDOWN));
if (msg->msg_name == NULL || msg->msg_namelen != sizeof (*laddr))
goto eproto;
/*
* The name is a datalink_id_t, the address is an Ethernet address, and
* the selector value is the VLAN ID.
*/
laddr = (struct sockaddr_dl *)msg->msg_name;
if (laddr->sdl_nlen != sizeof (datalink_id_t) ||
laddr->sdl_alen != ETHERADDRL ||
(laddr->sdl_slen != sizeof (tci) && laddr->sdl_slen != 0))
goto eproto;
mutex_enter(&tsock->ts_socklock);
if (tsock->ts_state != TS_IDLE || tsock->ts_link == NULL) {
mutex_exit(&tsock->ts_socklock);
goto eproto;
}
atomic_inc_uint(&tsock->ts_sockthreadcount);
mutex_exit(&tsock->ts_socklock);
/*
* Safe to dereference VLAN now, as we've checked the user's specified
* values, and alignment is now guaranteed.
*/
if (laddr->sdl_slen == 0) {
tci = TRILL_NO_TCI;
} else {
/* LINTED: alignment */
tci = *(uint16_t *)(LLADDR(laddr) + ETHERADDRL);
}
mp = create_trill_header(tsock, mp, (const uchar_t *)LLADDR(laddr),
B_TRUE, B_FALSE, tci, msgdsize(mp));
if (mp != NULL) {
mp = bridge_trill_output(tsock->ts_link, mp);
if (mp == NULL) {
KSPINCR(tks_sent);
} else {
freemsg(mp);
KSPINCR(tks_drops);
}
}
/* Wake up any threads blocking on us */
if (atomic_dec_uint_nv(&tsock->ts_sockthreadcount) == 0)
cv_broadcast(&tsock->ts_sockthreadwait);
return (0);
eproto:
freemsg(mp);
KSPINCR(tks_drops);
return (EPROTO);
}
/* ARGSUSED */
static int
trill_ioctl(sock_lower_handle_t proto_handle, int cmd, intptr_t arg,
int mode, int32_t *rvalp, cred_t *cr)
{
trill_sock_t *tsock = (trill_sock_t *)proto_handle;
int rc;
switch (cmd) {
/* List of unprivileged TRILL ioctls */
case TRILL_GETNICK:
case TRILL_GETBRIDGE:
case TRILL_LISTNICK:
break;
default:
if (secpolicy_dl_config(cr) != 0)
return (EPERM);
break;
}
/* Lock ensures socket state is unchanged during ioctl handling */
mutex_enter(&tsock->ts_socklock);
rc = trill_do_ioctl(tsock, cmd, (void *)arg, mode);
mutex_exit(&tsock->ts_socklock);
return (rc);
}
static void
trill_clr_flowctrl(sock_lower_handle_t proto_handle)
{
trill_sock_t *tsock = (trill_sock_t *)proto_handle;
mutex_enter(&tsock->ts_socklock);
tsock->ts_flow_ctrld = B_FALSE;
mutex_exit(&tsock->ts_socklock);
}
static sock_downcalls_t sock_trill_downcalls = {
trill_activate, /* sd_activate */
sock_accept_notsupp, /* sd_accept */
trill_bind, /* sd_bind */
sock_listen_notsupp, /* sd_listen */
sock_connect_notsupp, /* sd_connect */
sock_getpeername_notsupp, /* sd_getpeername */
sock_getsockname_notsupp, /* sd_getsockname */
sock_getsockopt_notsupp, /* sd_getsockopt */
sock_setsockopt_notsupp, /* sd_setsockopt */
trill_send, /* sd_send */
NULL, /* sd_send_uio */
NULL, /* sd_recv_uio */
NULL, /* sd_poll */
sock_shutdown_notsupp, /* sd_shutdown */
trill_clr_flowctrl, /* sd_setflowctrl */
trill_ioctl, /* sd_ioctl */
trill_close /* sd_close */
};
/* ARGSUSED */
static sock_lower_handle_t
trill_create(int family, int type, int proto, sock_downcalls_t **sock_downcalls,
uint_t *smodep, int *errorp, int flags, cred_t *credp)
{
trill_sock_t *tsock;
if (family != AF_TRILL || type != SOCK_DGRAM || proto != 0) {
*errorp = EPROTONOSUPPORT;
return (NULL);
}
*sock_downcalls = &sock_trill_downcalls;
*smodep = SM_ATOMIC;
tsock = trill_do_open(flags);
*errorp = (tsock != NULL) ? 0:ENOMEM;
return ((sock_lower_handle_t)tsock);
}