/**
* tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer
*
* Send packet over as many bearers as necessary to reach all nodes
* that have joined the broadcast link.
*
* Returns 0 (packet sent successfully) under all circumstances,
* since the broadcast link's pseudo-bearer never blocks
*/
static int tipc_bcbearer_send(struct sk_buff *buf,
struct tipc_bearer *unused1,
struct tipc_media_addr *unused2)
{
int bp_index;
/* Prepare broadcast link message for reliable transmission,
* if first time trying to send it;
* preparation is skipped for broadcast link protocol messages
* since they are sent in an unreliable manner and don't need it
*/
if (likely(!msg_non_seq(buf_msg(buf)))) {
struct tipc_msg *msg;
bcbuf_set_acks(buf, bclink->bcast_nodes.count);
msg = buf_msg(buf);
msg_set_non_seq(msg, 1);
msg_set_mc_netid(msg, tipc_net_id);
bcl->stats.sent_info++;
if (WARN_ON(!bclink->bcast_nodes.count)) {
dump_stack();
return 0;
}
}
/* Send buffer over bearers until all targets reached */
bcbearer->remains = bclink->bcast_nodes;
for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) {
struct tipc_bearer *p = bcbearer->bpairs[bp_index].primary;
struct tipc_bearer *s = bcbearer->bpairs[bp_index].secondary;
struct tipc_bearer *b = p;
struct sk_buff *tbuf;
if (!p)
break; /* No more bearers to try */
if (tipc_bearer_blocked(p)) {
if (!s || tipc_bearer_blocked(s))
continue; /* Can't use either bearer */
b = s;
}
tipc_nmap_diff(&bcbearer->remains, &b->nodes,
&bcbearer->remains_new);
if (bcbearer->remains_new.count == bcbearer->remains.count)
continue; /* Nothing added by bearer pair */
if (bp_index == 0) {
/* Use original buffer for first bearer */
tipc_bearer_send(b, buf, &b->bcast_addr);
} else {
/* Avoid concurrent buffer access */
tbuf = pskb_copy(buf, GFP_ATOMIC);
if (!tbuf)
break;
tipc_bearer_send(b, tbuf, &b->bcast_addr);
kfree_skb(tbuf); /* Bearer keeps a clone */
}
/* Swap bearers for next packet */
if (s) {
bcbearer->bpairs[bp_index].primary = s;
bcbearer->bpairs[bp_index].secondary = p;
}
if (bcbearer->remains_new.count == 0)
break; /* All targets reached */
bcbearer->remains = bcbearer->remains_new;
}
return 0;
}
static int tipc_bcbearer_send(struct sk_buff *buf,
struct tipc_bearer *unused1,
struct tipc_media_addr *unused2)
{
int bp_index;
/*
* Prepare broadcast link message for reliable transmission,
* if first time trying to send it;
* preparation is skipped for broadcast link protocol messages
* since they are sent in an unreliable manner and don't need it
*/
if (likely(!msg_non_seq(buf_msg(buf)))) {
struct tipc_msg *msg;
bcbuf_set_acks(buf, bclink->bcast_nodes.count);
msg = buf_msg(buf);
msg_set_non_seq(msg, 1);
msg_set_mc_netid(msg, tipc_net_id);
bcl->stats.sent_info++;
if (WARN_ON(!bclink->bcast_nodes.count)) {
dump_stack();
return 0;
}
}
/* Send buffer over bearers until all targets reached */
bcbearer->remains = bclink->bcast_nodes;
for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) {
struct tipc_bearer *p = bcbearer->bpairs[bp_index].primary;
struct tipc_bearer *s = bcbearer->bpairs[bp_index].secondary;
if (!p)
break; /* no more bearers to try */
tipc_nmap_diff(&bcbearer->remains, &p->nodes, &bcbearer->remains_new);
if (bcbearer->remains_new.count == bcbearer->remains.count)
continue; /* bearer pair doesn't add anything */
if (p->blocked ||
p->media->send_msg(buf, p, &p->media->bcast_addr)) {
/* unable to send on primary bearer */
if (!s || s->blocked ||
s->media->send_msg(buf, s,
&s->media->bcast_addr)) {
/* unable to send on either bearer */
continue;
}
}
if (s) {
bcbearer->bpairs[bp_index].primary = s;
bcbearer->bpairs[bp_index].secondary = p;
}
if (bcbearer->remains_new.count == 0)
break; /* all targets reached */
bcbearer->remains = bcbearer->remains_new;
}
return 0;
}
void tipc_msg_print(struct print_buf *buf, struct tipc_msg *msg, const char *str)
{
u32 usr = msg_user(msg);
tipc_printf(buf, str);
switch (usr) {
case MSG_BUNDLER:
tipc_printf(buf, "BNDL::");
tipc_printf(buf, "MSGS(%u):", msg_msgcnt(msg));
break;
case BCAST_PROTOCOL:
tipc_printf(buf, "BCASTP::");
break;
case MSG_FRAGMENTER:
tipc_printf(buf, "FRAGM::");
switch (msg_type(msg)) {
case FIRST_FRAGMENT:
tipc_printf(buf, "FIRST:");
break;
case FRAGMENT:
tipc_printf(buf, "BODY:");
break;
case LAST_FRAGMENT:
tipc_printf(buf, "LAST:");
break;
default:
tipc_printf(buf, "UNKNOWN:%x",msg_type(msg));
}
tipc_printf(buf, "NO(%u/%u):",msg_long_msgno(msg),
msg_fragm_no(msg));
break;
case TIPC_LOW_IMPORTANCE:
case TIPC_MEDIUM_IMPORTANCE:
case TIPC_HIGH_IMPORTANCE:
case TIPC_CRITICAL_IMPORTANCE:
tipc_printf(buf, "DAT%u:", msg_user(msg));
if (msg_short(msg)) {
tipc_printf(buf, "CON:");
break;
}
switch (msg_type(msg)) {
case TIPC_CONN_MSG:
tipc_printf(buf, "CON:");
break;
case TIPC_MCAST_MSG:
tipc_printf(buf, "MCST:");
break;
case TIPC_NAMED_MSG:
tipc_printf(buf, "NAM:");
break;
case TIPC_DIRECT_MSG:
tipc_printf(buf, "DIR:");
break;
default:
tipc_printf(buf, "UNKNOWN TYPE %u",msg_type(msg));
}
if (msg_routed(msg) && !msg_non_seq(msg))
tipc_printf(buf, "ROUT:");
if (msg_reroute_cnt(msg))
tipc_printf(buf, "REROUTED(%u):",
msg_reroute_cnt(msg));
break;
case NAME_DISTRIBUTOR:
tipc_printf(buf, "NMD::");
switch (msg_type(msg)) {
case PUBLICATION:
tipc_printf(buf, "PUBL(%u):", (msg_size(msg) - msg_hdr_sz(msg)) / 20); /* Items */
break;
case WITHDRAWAL:
tipc_printf(buf, "WDRW:");
break;
default:
tipc_printf(buf, "UNKNOWN:%x",msg_type(msg));
}
if (msg_routed(msg))
tipc_printf(buf, "ROUT:");
if (msg_reroute_cnt(msg))
tipc_printf(buf, "REROUTED(%u):",
msg_reroute_cnt(msg));
break;
case CONN_MANAGER:
tipc_printf(buf, "CONN_MNG:");
switch (msg_type(msg)) {
case CONN_PROBE:
tipc_printf(buf, "PROBE:");
break;
case CONN_PROBE_REPLY:
tipc_printf(buf, "PROBE_REPLY:");
break;
case CONN_ACK:
tipc_printf(buf, "CONN_ACK:");
tipc_printf(buf, "ACK(%u):",msg_msgcnt(msg));
break;
default:
tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg));
}
if (msg_routed(msg))
tipc_printf(buf, "ROUT:");
if (msg_reroute_cnt(msg))
tipc_printf(buf, "REROUTED(%u):",msg_reroute_cnt(msg));
break;
case LINK_PROTOCOL:
tipc_printf(buf, "PROT:TIM(%u):",msg_timestamp(msg));
switch (msg_type(msg)) {
case STATE_MSG:
tipc_printf(buf, "STATE:");
tipc_printf(buf, "%s:",msg_probe(msg) ? "PRB" :"");
tipc_printf(buf, "NXS(%u):",msg_next_sent(msg));
tipc_printf(buf, "GAP(%u):",msg_seq_gap(msg));
tipc_printf(buf, "LSTBC(%u):",msg_last_bcast(msg));
break;
case RESET_MSG:
tipc_printf(buf, "RESET:");
if (msg_size(msg) != msg_hdr_sz(msg))
tipc_printf(buf, "BEAR:%s:",msg_data(msg));
break;
case ACTIVATE_MSG:
tipc_printf(buf, "ACTIVATE:");
break;
default:
tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg));
}
tipc_printf(buf, "PLANE(%c):",msg_net_plane(msg));
tipc_printf(buf, "SESS(%u):",msg_session(msg));
break;
case CHANGEOVER_PROTOCOL:
tipc_printf(buf, "TUNL:");
switch (msg_type(msg)) {
case DUPLICATE_MSG:
tipc_printf(buf, "DUPL:");
break;
case ORIGINAL_MSG:
tipc_printf(buf, "ORIG:");
tipc_printf(buf, "EXP(%u)",msg_msgcnt(msg));
break;
default:
tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg));
}
break;
case ROUTE_DISTRIBUTOR:
tipc_printf(buf, "ROUTING_MNG:");
switch (msg_type(msg)) {
case EXT_ROUTING_TABLE:
tipc_printf(buf, "EXT_TBL:");
tipc_printf(buf, "TO:%x:",msg_remote_node(msg));
break;
case LOCAL_ROUTING_TABLE:
tipc_printf(buf, "LOCAL_TBL:");
tipc_printf(buf, "TO:%x:",msg_remote_node(msg));
break;
case SLAVE_ROUTING_TABLE:
tipc_printf(buf, "DP_TBL:");
tipc_printf(buf, "TO:%x:",msg_remote_node(msg));
break;
case ROUTE_ADDITION:
tipc_printf(buf, "ADD:");
tipc_printf(buf, "TO:%x:",msg_remote_node(msg));
break;
case ROUTE_REMOVAL:
tipc_printf(buf, "REMOVE:");
tipc_printf(buf, "TO:%x:",msg_remote_node(msg));
break;
default:
tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg));
}
break;
case LINK_CONFIG:
tipc_printf(buf, "CFG:");
switch (msg_type(msg)) {
case DSC_REQ_MSG:
tipc_printf(buf, "DSC_REQ:");
break;
case DSC_RESP_MSG:
tipc_printf(buf, "DSC_RESP:");
break;
default:
tipc_printf(buf, "UNKNOWN TYPE:%x:",msg_type(msg));
break;
}
break;
default:
tipc_printf(buf, "UNKNOWN USER:"******"NO_NAME:");
break;
case TIPC_ERR_NO_PORT:
tipc_printf(buf, "NO_PORT:");
break;
case TIPC_ERR_NO_NODE:
tipc_printf(buf, "NO_PROC:");
break;
case TIPC_ERR_OVERLOAD:
tipc_printf(buf, "OVERLOAD:");
break;
case TIPC_CONN_SHUTDOWN:
tipc_printf(buf, "SHUTDOWN:");
break;
default:
tipc_printf(buf, "UNKNOWN ERROR(%x):",
msg_errcode(msg));
}
default:{}
}
tipc_printf(buf, "HZ(%u):", msg_hdr_sz(msg));
tipc_printf(buf, "SZ(%u):", msg_size(msg));
tipc_printf(buf, "SQNO(%u):", msg_seqno(msg));
if (msg_non_seq(msg))
tipc_printf(buf, "NOSEQ:");
else {
tipc_printf(buf, "ACK(%u):", msg_ack(msg));
}
tipc_printf(buf, "BACK(%u):", msg_bcast_ack(msg));
tipc_printf(buf, "PRND(%x)", msg_prevnode(msg));
if (msg_isdata(msg)) {
if (msg_named(msg)) {
tipc_printf(buf, "NTYP(%u):", msg_nametype(msg));
tipc_printf(buf, "NINST(%u)", msg_nameinst(msg));
}
}
if ((usr != LINK_PROTOCOL) && (usr != LINK_CONFIG) &&
(usr != MSG_BUNDLER)) {
if (!msg_short(msg)) {
tipc_printf(buf, ":ORIG(%x:%u):",
msg_orignode(msg), msg_origport(msg));
tipc_printf(buf, ":DEST(%x:%u):",
msg_destnode(msg), msg_destport(msg));
} else {
tipc_printf(buf, ":OPRT(%u):", msg_origport(msg));
tipc_printf(buf, ":DPRT(%u):", msg_destport(msg));
}
if (msg_routed(msg) && !msg_non_seq(msg))
tipc_printf(buf, ":TSEQN(%u)", msg_transp_seqno(msg));
}
if (msg_user(msg) == NAME_DISTRIBUTOR) {
tipc_printf(buf, ":ONOD(%x):", msg_orignode(msg));
tipc_printf(buf, ":DNOD(%x):", msg_destnode(msg));
if (msg_routed(msg)) {
tipc_printf(buf, ":CSEQN(%u)", msg_transp_seqno(msg));
}
}
if (msg_user(msg) == LINK_CONFIG) {
u32* raw = (u32*)msg;
struct tipc_media_addr* orig = (struct tipc_media_addr*)&raw[5];
tipc_printf(buf, ":REQL(%u):", msg_req_links(msg));
tipc_printf(buf, ":DDOM(%x):", msg_dest_domain(msg));
tipc_printf(buf, ":NETID(%u):", msg_bc_netid(msg));
tipc_media_addr_printf(buf, orig);
}
if (msg_user(msg) == BCAST_PROTOCOL) {
tipc_printf(buf, "BCNACK:AFTER(%u):", msg_bcgap_after(msg));
tipc_printf(buf, "TO(%u):", msg_bcgap_to(msg));
}
tipc_printf(buf, "\n");
if ((usr == CHANGEOVER_PROTOCOL) && (msg_msgcnt(msg))) {
tipc_msg_print(buf,msg_get_wrapped(msg)," /");
}
if ((usr == MSG_FRAGMENTER) && (msg_type(msg) == FIRST_FRAGMENT)) {
tipc_msg_print(buf,msg_get_wrapped(msg)," /");
}
}
static int tipc_bcbearer_send(struct sk_buff *buf,
struct tipc_bearer *unused1,
struct tipc_media_addr *unused2)
{
static int send_count = 0;
int bp_index;
int swap_time;
/* Prepare buffer for broadcasting (if first time trying to send it) */
if (likely(!msg_non_seq(buf_msg(buf)))) {
struct tipc_msg *msg;
assert(tipc_cltr_bcast_nodes.count != 0);
bcbuf_set_acks(buf, tipc_cltr_bcast_nodes.count);
msg = buf_msg(buf);
msg_set_non_seq(msg, 1);
msg_set_mc_netid(msg, tipc_net_id);
}
/* Determine if bearer pairs should be swapped following this attempt */
if ((swap_time = (++send_count >= 10)))
send_count = 0;
/* Send buffer over bearers until all targets reached */
bcbearer->remains = tipc_cltr_bcast_nodes;
for (bp_index = 0; bp_index < MAX_BEARERS; bp_index++) {
struct bearer *p = bcbearer->bpairs[bp_index].primary;
struct bearer *s = bcbearer->bpairs[bp_index].secondary;
if (!p)
break; /* no more bearers to try */
tipc_nmap_diff(&bcbearer->remains, &p->nodes, &bcbearer->remains_new);
if (bcbearer->remains_new.count == bcbearer->remains.count)
continue; /* bearer pair doesn't add anything */
if (!p->publ.blocked &&
!p->media->send_msg(buf, &p->publ, &p->media->bcast_addr)) {
if (swap_time && s && !s->publ.blocked)
goto swap;
else
goto update;
}
if (!s || s->publ.blocked ||
s->media->send_msg(buf, &s->publ, &s->media->bcast_addr))
continue; /* unable to send using bearer pair */
swap:
bcbearer->bpairs[bp_index].primary = s;
bcbearer->bpairs[bp_index].secondary = p;
update:
if (bcbearer->remains_new.count == 0)
return 0;
bcbearer->remains = bcbearer->remains_new;
}
/* Unable to reach all targets */
bcbearer->bearer.publ.blocked = 1;
bcl->stats.bearer_congs++;
return 1;
}
