* POSSIBILITY OF SUCH DAMAGE.
*/
+#include <linux/tipc_config.h>
#include "socket.h"
#include "msg.h"
#include "bcast.h"
#include "name_distr.h"
-#include "core.h"
+#include "link.h"
+#include "node.h"
-#define MAX_PKT_DEFAULT_MCAST 1500 /* bcast link max packet size (fixed) */
-#define BCLINK_WIN_DEFAULT 20 /* bcast link window size (default) */
+#define BCLINK_WIN_DEFAULT 50 /* bcast link window size (default) */
+#define BCLINK_WIN_MIN 32 /* bcast minimum link window size */
const char tipc_bclink_name[] = "broadcast-link";
-static void tipc_nmap_diff(struct tipc_node_map *nm_a,
- struct tipc_node_map *nm_b,
- struct tipc_node_map *nm_diff);
-static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node);
-static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node);
-
-static void tipc_bclink_lock(struct net *net)
-{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
-
- spin_lock_bh(&tn->bclink->lock);
-}
-
-static void tipc_bclink_unlock(struct net *net)
-{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
-
- spin_unlock_bh(&tn->bclink->lock);
-}
-
-void tipc_bclink_input(struct net *net)
-{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
-
- tipc_sk_mcast_rcv(net, &tn->bclink->arrvq, &tn->bclink->inputq);
-}
-
-uint tipc_bclink_get_mtu(void)
-{
- return MAX_PKT_DEFAULT_MCAST;
-}
-
-static u32 bcbuf_acks(struct sk_buff *buf)
-{
- return (u32)(unsigned long)TIPC_SKB_CB(buf)->handle;
-}
-
-static void bcbuf_set_acks(struct sk_buff *buf, u32 acks)
-{
- TIPC_SKB_CB(buf)->handle = (void *)(unsigned long)acks;
-}
-
-static void bcbuf_decr_acks(struct sk_buff *buf)
-{
- bcbuf_set_acks(buf, bcbuf_acks(buf) - 1);
-}
+/**
+ * struct tipc_bc_base - base structure for keeping broadcast send state
+ * @link: broadcast send link structure
+ * @inputq: data input queue; will only carry SOCK_WAKEUP messages
+ * @dest: array keeping number of reachable destinations per bearer
+ * @primary_bearer: a bearer having links to all broadcast destinations, if any
+ */
+struct tipc_bc_base {
+ struct tipc_link *link;
+ struct sk_buff_head inputq;
+ int dests[MAX_BEARERS];
+ int primary_bearer;
+};
-void tipc_bclink_add_node(struct net *net, u32 addr)
+static struct tipc_bc_base *tipc_bc_base(struct net *net)
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
-
- tipc_bclink_lock(net);
- tipc_nmap_add(&tn->bclink->bcast_nodes, addr);
- tipc_bclink_unlock(net);
+ return tipc_net(net)->bcbase;
}
-void tipc_bclink_remove_node(struct net *net, u32 addr)
+int tipc_bcast_get_mtu(struct net *net)
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
-
- tipc_bclink_lock(net);
- tipc_nmap_remove(&tn->bclink->bcast_nodes, addr);
- tipc_bclink_unlock(net);
+ return tipc_link_mtu(tipc_bc_sndlink(net));
}
-static void bclink_set_last_sent(struct net *net)
+/* tipc_bcbase_select_primary(): find a bearer with links to all destinations,
+ * if any, and make it primary bearer
+ */
+static void tipc_bcbase_select_primary(struct net *net)
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
- struct tipc_link *bcl = tn->bcl;
- struct sk_buff *skb = skb_peek(&bcl->backlogq);
+ struct tipc_bc_base *bb = tipc_bc_base(net);
+ int all_dests = tipc_link_bc_peers(bb->link);
+ int i, mtu;
- if (skb)
- bcl->fsm_msg_cnt = mod(buf_seqno(skb) - 1);
- else
- bcl->fsm_msg_cnt = mod(bcl->next_out_no - 1);
-}
-
-u32 tipc_bclink_get_last_sent(struct net *net)
-{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
+ bb->primary_bearer = INVALID_BEARER_ID;
- return tn->bcl->fsm_msg_cnt;
-}
+ if (!all_dests)
+ return;
-static void bclink_update_last_sent(struct tipc_node *node, u32 seqno)
-{
- node->bclink.last_sent = less_eq(node->bclink.last_sent, seqno) ?
- seqno : node->bclink.last_sent;
-}
+ for (i = 0; i < MAX_BEARERS; i++) {
+ if (!bb->dests[i])
+ continue;
-/**
- * tipc_bclink_retransmit_to - get most recent node to request retransmission
- *
- * Called with bclink_lock locked
- */
-struct tipc_node *tipc_bclink_retransmit_to(struct net *net)
-{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
+ mtu = tipc_bearer_mtu(net, i);
+ if (mtu < tipc_link_mtu(bb->link))
+ tipc_link_set_mtu(bb->link, mtu);
- return tn->bclink->retransmit_to;
-}
+ if (bb->dests[i] < all_dests)
+ continue;
-/**
- * bclink_retransmit_pkt - retransmit broadcast packets
- * @after: sequence number of last packet to *not* retransmit
- * @to: sequence number of last packet to retransmit
- *
- * Called with bclink_lock locked
- */
-static void bclink_retransmit_pkt(struct tipc_net *tn, u32 after, u32 to)
-{
- struct sk_buff *skb;
- struct tipc_link *bcl = tn->bcl;
+ bb->primary_bearer = i;
- skb_queue_walk(&bcl->transmq, skb) {
- if (more(buf_seqno(skb), after)) {
- tipc_link_retransmit(bcl, skb, mod(to - after));
+ /* Reduce risk that all nodes select same primary */
+ if ((i ^ tipc_own_addr(net)) & 1)
break;
- }
}
}
-/**
- * tipc_bclink_wakeup_users - wake up pending users
- *
- * Called with no locks taken
- */
-void tipc_bclink_wakeup_users(struct net *net)
+void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id)
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
+ struct tipc_bc_base *bb = tipc_bc_base(net);
- tipc_sk_rcv(net, &tn->bclink->link.wakeupq);
+ tipc_bcast_lock(net);
+ bb->dests[bearer_id]++;
+ tipc_bcbase_select_primary(net);
+ tipc_bcast_unlock(net);
}
-/**
- * tipc_bclink_acknowledge - handle acknowledgement of broadcast packets
- * @n_ptr: node that sent acknowledgement info
- * @acked: broadcast sequence # that has been acknowledged
- *
- * Node is locked, bclink_lock unlocked.
- */
-void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
+void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id)
{
- struct sk_buff *skb, *tmp;
- unsigned int released = 0;
- struct net *net = n_ptr->net;
- struct tipc_net *tn = net_generic(net, tipc_net_id);
-
- if (unlikely(!n_ptr->bclink.recv_permitted))
- return;
-
- tipc_bclink_lock(net);
-
- /* Bail out if tx queue is empty (no clean up is required) */
- skb = skb_peek(&tn->bcl->transmq);
- if (!skb)
- goto exit;
-
- /* Determine which messages need to be acknowledged */
- if (acked == INVALID_LINK_SEQ) {
- /*
- * Contact with specified node has been lost, so need to
- * acknowledge sent messages only (if other nodes still exist)
- * or both sent and unsent messages (otherwise)
- */
- if (tn->bclink->bcast_nodes.count)
- acked = tn->bcl->fsm_msg_cnt;
- else
- acked = tn->bcl->next_out_no;
- } else {
- /*
- * Bail out if specified sequence number does not correspond
- * to a message that has been sent and not yet acknowledged
- */
- if (less(acked, buf_seqno(skb)) ||
- less(tn->bcl->fsm_msg_cnt, acked) ||
- less_eq(acked, n_ptr->bclink.acked))
- goto exit;
- }
-
- /* Skip over packets that node has previously acknowledged */
- skb_queue_walk(&tn->bcl->transmq, skb) {
- if (more(buf_seqno(skb), n_ptr->bclink.acked))
- break;
- }
+ struct tipc_bc_base *bb = tipc_bc_base(net);
- /* Update packets that node is now acknowledging */
- skb_queue_walk_from_safe(&tn->bcl->transmq, skb, tmp) {
- if (more(buf_seqno(skb), acked))
- break;
- bcbuf_decr_acks(skb);
- bclink_set_last_sent(net);
- if (bcbuf_acks(skb) == 0) {
- __skb_unlink(skb, &tn->bcl->transmq);
- kfree_skb(skb);
- released = 1;
- }
- }
- n_ptr->bclink.acked = acked;
-
- /* Try resolving broadcast link congestion, if necessary */
- if (unlikely(skb_peek(&tn->bcl->backlogq))) {
- tipc_link_push_packets(tn->bcl);
- bclink_set_last_sent(net);
- }
- if (unlikely(released && !skb_queue_empty(&tn->bcl->wakeupq)))
- n_ptr->action_flags |= TIPC_WAKEUP_BCAST_USERS;
-exit:
- tipc_bclink_unlock(net);
+ tipc_bcast_lock(net);
+ bb->dests[bearer_id]--;
+ tipc_bcbase_select_primary(net);
+ tipc_bcast_unlock(net);
}
-/**
- * tipc_bclink_update_link_state - update broadcast link state
+/* tipc_bcbase_xmit - broadcast a packet queue across one or more bearers
*
- * RCU and node lock set
+ * Note that number of reachable destinations, as indicated in the dests[]
+ * array, may transitionally differ from the number of destinations indicated
+ * in each sent buffer. We can sustain this. Excess destination nodes will
+ * drop and never acknowledge the unexpected packets, and missing destinations
+ * will either require retransmission (if they are just about to be added to
+ * the bearer), or be removed from the buffer's 'ackers' counter (if they
+ * just went down)
*/
-void tipc_bclink_update_link_state(struct tipc_node *n_ptr,
- u32 last_sent)
+static void tipc_bcbase_xmit(struct net *net, struct sk_buff_head *xmitq)
{
- struct sk_buff *buf;
- struct net *net = n_ptr->net;
- struct tipc_net *tn = net_generic(net, tipc_net_id);
+ int bearer_id;
+ struct tipc_bc_base *bb = tipc_bc_base(net);
+ struct sk_buff *skb, *_skb;
+ struct sk_buff_head _xmitq;
- /* Ignore "stale" link state info */
- if (less_eq(last_sent, n_ptr->bclink.last_in))
+ if (skb_queue_empty(xmitq))
return;
- /* Update link synchronization state; quit if in sync */
- bclink_update_last_sent(n_ptr, last_sent);
-
- if (n_ptr->bclink.last_sent == n_ptr->bclink.last_in)
+ /* The typical case: at least one bearer has links to all nodes */
+ bearer_id = bb->primary_bearer;
+ if (bearer_id >= 0) {
+ tipc_bearer_bc_xmit(net, bearer_id, xmitq);
return;
-
- /* Update out-of-sync state; quit if loss is still unconfirmed */
- if ((++n_ptr->bclink.oos_state) == 1) {
- if (n_ptr->bclink.deferred_size < (TIPC_MIN_LINK_WIN / 2))
- return;
- n_ptr->bclink.oos_state++;
}
- /* Don't NACK if one has been recently sent (or seen) */
- if (n_ptr->bclink.oos_state & 0x1)
- return;
+ /* We have to transmit across all bearers */
+ skb_queue_head_init(&_xmitq);
+ for (bearer_id = 0; bearer_id < MAX_BEARERS; bearer_id++) {
+ if (!bb->dests[bearer_id])
+ continue;
- /* Send NACK */
- buf = tipc_buf_acquire(INT_H_SIZE);
- if (buf) {
- struct tipc_msg *msg = buf_msg(buf);
- struct sk_buff *skb = skb_peek(&n_ptr->bclink.deferdq);
- u32 to = skb ? buf_seqno(skb) - 1 : n_ptr->bclink.last_sent;
-
- tipc_msg_init(tn->own_addr, msg, BCAST_PROTOCOL, STATE_MSG,
- INT_H_SIZE, n_ptr->addr);
- msg_set_non_seq(msg, 1);
- msg_set_mc_netid(msg, tn->net_id);
- msg_set_bcast_ack(msg, n_ptr->bclink.last_in);
- msg_set_bcgap_after(msg, n_ptr->bclink.last_in);
- msg_set_bcgap_to(msg, to);
-
- tipc_bclink_lock(net);
- tipc_bearer_send(net, MAX_BEARERS, buf, NULL);
- tn->bcl->stats.sent_nacks++;
- tipc_bclink_unlock(net);
- kfree_skb(buf);
-
- n_ptr->bclink.oos_state++;
+ skb_queue_walk(xmitq, skb) {
+ _skb = pskb_copy_for_clone(skb, GFP_ATOMIC);
+ if (!_skb)
+ break;
+ __skb_queue_tail(&_xmitq, _skb);
+ }
+ tipc_bearer_bc_xmit(net, bearer_id, &_xmitq);
}
+ __skb_queue_purge(xmitq);
+ __skb_queue_purge(&_xmitq);
}
-/**
- * bclink_peek_nack - monitor retransmission requests sent by other nodes
- *
- * Delay any upcoming NACK by this node if another node has already
- * requested the first message this node is going to ask for.
- */
-static void bclink_peek_nack(struct net *net, struct tipc_msg *msg)
-{
- struct tipc_node *n_ptr = tipc_node_find(net, msg_destnode(msg));
-
- if (unlikely(!n_ptr))
- return;
-
- tipc_node_lock(n_ptr);
- if (n_ptr->bclink.recv_permitted &&
- (n_ptr->bclink.last_in != n_ptr->bclink.last_sent) &&
- (n_ptr->bclink.last_in == msg_bcgap_after(msg)))
- n_ptr->bclink.oos_state = 2;
- tipc_node_unlock(n_ptr);
- tipc_node_put(n_ptr);
-}
-
-/* tipc_bclink_xmit - deliver buffer chain to all nodes in cluster
+/* tipc_bcast_xmit - deliver buffer chain to all nodes in cluster
* and to identified node local sockets
* @net: the applicable net namespace
* @list: chain of buffers containing message
* Consumes the buffer chain, except when returning -ELINKCONG
* Returns 0 if success, otherwise errno: -ELINKCONG,-EHOSTUNREACH,-EMSGSIZE
*/
-int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list)
+int tipc_bcast_xmit(struct net *net, struct sk_buff_head *list)
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
- struct tipc_link *bcl = tn->bcl;
- struct tipc_bclink *bclink = tn->bclink;
+ struct tipc_link *l = tipc_bc_sndlink(net);
+ struct sk_buff_head xmitq, inputq, rcvq;
int rc = 0;
- int bc = 0;
- struct sk_buff *skb;
- struct sk_buff_head arrvq;
- struct sk_buff_head inputq;
- /* Prepare clone of message for local node */
- skb = tipc_msg_reassemble(list);
- if (unlikely(!skb)) {
- __skb_queue_purge(list);
+ __skb_queue_head_init(&rcvq);
+ __skb_queue_head_init(&xmitq);
+ skb_queue_head_init(&inputq);
+
+ /* Prepare message clone for local node */
+ if (unlikely(!tipc_msg_reassemble(list, &rcvq)))
return -EHOSTUNREACH;
- }
- /* Broadcast to all nodes */
- if (likely(bclink)) {
- tipc_bclink_lock(net);
- if (likely(bclink->bcast_nodes.count)) {
- rc = __tipc_link_xmit(net, bcl, list);
- if (likely(!rc)) {
- u32 len = skb_queue_len(&bcl->transmq);
-
- bclink_set_last_sent(net);
- bcl->stats.queue_sz_counts++;
- bcl->stats.accu_queue_sz += len;
- }
- bc = 1;
- }
- tipc_bclink_unlock(net);
- }
- if (unlikely(!bc))
- __skb_queue_purge(list);
+ tipc_bcast_lock(net);
+ if (tipc_link_bc_peers(l))
+ rc = tipc_link_xmit(l, list, &xmitq);
+ tipc_bcast_unlock(net);
+ /* Don't send to local node if adding to link failed */
if (unlikely(rc)) {
- kfree_skb(skb);
+ __skb_queue_purge(&rcvq);
return rc;
}
- /* Deliver message clone */
- __skb_queue_head_init(&arrvq);
- skb_queue_head_init(&inputq);
- __skb_queue_tail(&arrvq, skb);
- tipc_sk_mcast_rcv(net, &arrvq, &inputq);
- return rc;
-}
-/**
- * bclink_accept_pkt - accept an incoming, in-sequence broadcast packet
- *
- * Called with both sending node's lock and bclink_lock taken.
- */
-static void bclink_accept_pkt(struct tipc_node *node, u32 seqno)
-{
- struct tipc_net *tn = net_generic(node->net, tipc_net_id);
-
- bclink_update_last_sent(node, seqno);
- node->bclink.last_in = seqno;
- node->bclink.oos_state = 0;
- tn->bcl->stats.recv_info++;
-
- /*
- * Unicast an ACK periodically, ensuring that
- * all nodes in the cluster don't ACK at the same time
- */
- if (((seqno - tn->own_addr) % TIPC_MIN_LINK_WIN) == 0) {
- tipc_link_proto_xmit(node->active_links[node->addr & 1],
- STATE_MSG, 0, 0, 0, 0);
- tn->bcl->stats.sent_acks++;
- }
+ /* Broadcast to all nodes, inluding local node */
+ tipc_bcbase_xmit(net, &xmitq);
+ tipc_sk_mcast_rcv(net, &rcvq, &inputq);
+ __skb_queue_purge(list);
+ return 0;
}
-/**
- * tipc_bclink_rcv - receive a broadcast packet, and deliver upwards
+/* tipc_bcast_rcv - receive a broadcast packet, and deliver to rcv link
*
* RCU is locked, no other locks set
*/
-void tipc_bclink_rcv(struct net *net, struct sk_buff *buf)
+int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb)
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
- struct tipc_link *bcl = tn->bcl;
- struct tipc_msg *msg = buf_msg(buf);
- struct tipc_node *node;
- u32 next_in;
- u32 seqno;
- int deferred = 0;
- int pos = 0;
- struct sk_buff *iskb;
- struct sk_buff_head *arrvq, *inputq;
-
- /* Screen out unwanted broadcast messages */
- if (msg_mc_netid(msg) != tn->net_id)
- goto exit;
-
- node = tipc_node_find(net, msg_prevnode(msg));
- if (unlikely(!node))
- goto exit;
-
- tipc_node_lock(node);
- if (unlikely(!node->bclink.recv_permitted))
- goto unlock;
-
- /* Handle broadcast protocol message */
- if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) {
- if (msg_type(msg) != STATE_MSG)
- goto unlock;
- if (msg_destnode(msg) == tn->own_addr) {
- tipc_bclink_acknowledge(node, msg_bcast_ack(msg));
- tipc_bclink_lock(net);
- bcl->stats.recv_nacks++;
- tn->bclink->retransmit_to = node;
- bclink_retransmit_pkt(tn, msg_bcgap_after(msg),
- msg_bcgap_to(msg));
- tipc_bclink_unlock(net);
- tipc_node_unlock(node);
- } else {
- tipc_node_unlock(node);
- bclink_peek_nack(net, msg);
- }
- tipc_node_put(node);
- goto exit;
- }
-
- /* Handle in-sequence broadcast message */
- seqno = msg_seqno(msg);
- next_in = mod(node->bclink.last_in + 1);
- arrvq = &tn->bclink->arrvq;
- inputq = &tn->bclink->inputq;
-
- if (likely(seqno == next_in)) {
-receive:
- /* Deliver message to destination */
- if (likely(msg_isdata(msg))) {
- tipc_bclink_lock(net);
- bclink_accept_pkt(node, seqno);
- spin_lock_bh(&inputq->lock);
- __skb_queue_tail(arrvq, buf);
- spin_unlock_bh(&inputq->lock);
- node->action_flags |= TIPC_BCAST_MSG_EVT;
- tipc_bclink_unlock(net);
- tipc_node_unlock(node);
- } else if (msg_user(msg) == MSG_BUNDLER) {
- tipc_bclink_lock(net);
- bclink_accept_pkt(node, seqno);
- bcl->stats.recv_bundles++;
- bcl->stats.recv_bundled += msg_msgcnt(msg);
- pos = 0;
- while (tipc_msg_extract(buf, &iskb, &pos)) {
- spin_lock_bh(&inputq->lock);
- __skb_queue_tail(arrvq, iskb);
- spin_unlock_bh(&inputq->lock);
- }
- node->action_flags |= TIPC_BCAST_MSG_EVT;
- tipc_bclink_unlock(net);
- tipc_node_unlock(node);
- } else if (msg_user(msg) == MSG_FRAGMENTER) {
- tipc_bclink_lock(net);
- bclink_accept_pkt(node, seqno);
- tipc_buf_append(&node->bclink.reasm_buf, &buf);
- if (unlikely(!buf && !node->bclink.reasm_buf)) {
- tipc_bclink_unlock(net);
- goto unlock;
- }
- bcl->stats.recv_fragments++;
- if (buf) {
- bcl->stats.recv_fragmented++;
- msg = buf_msg(buf);
- tipc_bclink_unlock(net);
- goto receive;
- }
- tipc_bclink_unlock(net);
- tipc_node_unlock(node);
- } else {
- tipc_bclink_lock(net);
- bclink_accept_pkt(node, seqno);
- tipc_bclink_unlock(net);
- tipc_node_unlock(node);
- kfree_skb(buf);
- }
- buf = NULL;
-
- /* Determine new synchronization state */
- tipc_node_lock(node);
- if (unlikely(!tipc_node_is_up(node)))
- goto unlock;
-
- if (node->bclink.last_in == node->bclink.last_sent)
- goto unlock;
+ struct tipc_msg *hdr = buf_msg(skb);
+ struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
+ struct sk_buff_head xmitq;
+ int rc;
- if (skb_queue_empty(&node->bclink.deferdq)) {
- node->bclink.oos_state = 1;
- goto unlock;
- }
-
- msg = buf_msg(skb_peek(&node->bclink.deferdq));
- seqno = msg_seqno(msg);
- next_in = mod(next_in + 1);
- if (seqno != next_in)
- goto unlock;
-
- /* Take in-sequence message from deferred queue & deliver it */
- buf = __skb_dequeue(&node->bclink.deferdq);
- goto receive;
- }
+ __skb_queue_head_init(&xmitq);
- /* Handle out-of-sequence broadcast message */
- if (less(next_in, seqno)) {
- deferred = tipc_link_defer_pkt(&node->bclink.deferdq,
- buf);
- bclink_update_last_sent(node, seqno);
- buf = NULL;
+ if (msg_mc_netid(hdr) != tipc_netid(net) || !tipc_link_is_up(l)) {
+ kfree_skb(skb);
+ return 0;
}
- tipc_bclink_lock(net);
-
- if (deferred)
- bcl->stats.deferred_recv++;
+ tipc_bcast_lock(net);
+ if (msg_user(hdr) == BCAST_PROTOCOL)
+ rc = tipc_link_bc_nack_rcv(l, skb, &xmitq);
else
- bcl->stats.duplicates++;
+ rc = tipc_link_rcv(l, skb, NULL);
+ tipc_bcast_unlock(net);
- tipc_bclink_unlock(net);
+ tipc_bcbase_xmit(net, &xmitq);
-unlock:
- tipc_node_unlock(node);
- tipc_node_put(node);
-exit:
- kfree_skb(buf);
-}
+ /* Any socket wakeup messages ? */
+ if (!skb_queue_empty(inputq))
+ tipc_sk_rcv(net, inputq);
-u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr)
-{
- return (n_ptr->bclink.recv_permitted &&
- (tipc_bclink_get_last_sent(n_ptr->net) != n_ptr->bclink.acked));
+ return rc;
}
-
-/**
- * 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.
+/* tipc_bcast_ack_rcv - receive and handle a broadcast acknowledge
*
- * Returns 0 (packet sent successfully) under all circumstances,
- * since the broadcast link's pseudo-bearer never blocks
+ * RCU is locked, no other locks set
*/
-static int tipc_bcbearer_send(struct net *net, struct sk_buff *buf,
- struct tipc_bearer *unused1,
- struct tipc_media_addr *unused2)
+void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l, u32 acked)
{
- int bp_index;
- struct tipc_msg *msg = buf_msg(buf);
- struct tipc_net *tn = net_generic(net, tipc_net_id);
- struct tipc_bcbearer *bcbearer = tn->bcbearer;
- struct tipc_bclink *bclink = tn->bclink;
-
- /* 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)))) {
- bcbuf_set_acks(buf, bclink->bcast_nodes.count);
- msg_set_non_seq(msg, 1);
- msg_set_mc_netid(msg, tn->net_id);
- tn->bcl->stats.sent_info++;
- if (WARN_ON(!bclink->bcast_nodes.count)) {
- dump_stack();
- return 0;
- }
- }
+ struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
+ struct sk_buff_head xmitq;
- /* 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 *bp[2] = {p, s};
- struct tipc_bearer *b = bp[msg_link_selector(msg)];
- struct sk_buff *tbuf;
-
- if (!p)
- break; /* No more bearers to try */
- if (!b)
- b = p;
- 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(net, b->identity, buf, &b->bcast_addr);
- } else {
- /* Avoid concurrent buffer access */
- tbuf = pskb_copy_for_clone(buf, GFP_ATOMIC);
- if (!tbuf)
- break;
- tipc_bearer_send(net, b->identity, tbuf,
- &b->bcast_addr);
- kfree_skb(tbuf); /* Bearer keeps a clone */
- }
- if (bcbearer->remains_new.count == 0)
- break; /* All targets reached */
+ __skb_queue_head_init(&xmitq);
- bcbearer->remains = bcbearer->remains_new;
- }
+ tipc_bcast_lock(net);
+ tipc_link_bc_ack_rcv(l, acked, &xmitq);
+ tipc_bcast_unlock(net);
- return 0;
+ tipc_bcbase_xmit(net, &xmitq);
+
+ /* Any socket wakeup messages ? */
+ if (!skb_queue_empty(inputq))
+ tipc_sk_rcv(net, inputq);
}
-/**
- * tipc_bcbearer_sort - create sets of bearer pairs used by broadcast bearer
+/* tipc_bcast_synch_rcv - check and update rcv link with peer's send state
+ *
+ * RCU is locked, no other locks set
*/
-void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr,
- u32 node, bool action)
+void tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l,
+ struct tipc_msg *hdr)
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
- struct tipc_bcbearer *bcbearer = tn->bcbearer;
- struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp;
- struct tipc_bcbearer_pair *bp_curr;
- struct tipc_bearer *b;
- int b_index;
- int pri;
-
- tipc_bclink_lock(net);
+ struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
+ struct sk_buff_head xmitq;
- if (action)
- tipc_nmap_add(nm_ptr, node);
- else
- tipc_nmap_remove(nm_ptr, node);
+ __skb_queue_head_init(&xmitq);
- /* Group bearers by priority (can assume max of two per priority) */
- memset(bp_temp, 0, sizeof(bcbearer->bpairs_temp));
+ tipc_bcast_lock(net);
+ if (msg_type(hdr) == STATE_MSG) {
+ tipc_link_bc_ack_rcv(l, msg_bcast_ack(hdr), &xmitq);
+ tipc_link_bc_sync_rcv(l, hdr, &xmitq);
+ } else {
+ tipc_link_bc_init_rcv(l, hdr);
+ }
+ tipc_bcast_unlock(net);
- rcu_read_lock();
- for (b_index = 0; b_index < MAX_BEARERS; b_index++) {
- b = rcu_dereference_rtnl(tn->bearer_list[b_index]);
- if (!b || !b->nodes.count)
- continue;
+ tipc_bcbase_xmit(net, &xmitq);
- if (!bp_temp[b->priority].primary)
- bp_temp[b->priority].primary = b;
- else
- bp_temp[b->priority].secondary = b;
- }
- rcu_read_unlock();
+ /* Any socket wakeup messages ? */
+ if (!skb_queue_empty(inputq))
+ tipc_sk_rcv(net, inputq);
+}
- /* Create array of bearer pairs for broadcasting */
- bp_curr = bcbearer->bpairs;
- memset(bcbearer->bpairs, 0, sizeof(bcbearer->bpairs));
+/* tipc_bcast_add_peer - add a peer node to broadcast link and bearer
+ *
+ * RCU is locked, node lock is set
+ */
+void tipc_bcast_add_peer(struct net *net, struct tipc_link *uc_l,
+ struct sk_buff_head *xmitq)
+{
+ struct tipc_link *snd_l = tipc_bc_sndlink(net);
- for (pri = TIPC_MAX_LINK_PRI; pri >= 0; pri--) {
+ tipc_bcast_lock(net);
+ tipc_link_add_bc_peer(snd_l, uc_l, xmitq);
+ tipc_bcbase_select_primary(net);
+ tipc_bcast_unlock(net);
+}
- if (!bp_temp[pri].primary)
- continue;
+/* tipc_bcast_remove_peer - remove a peer node from broadcast link and bearer
+ *
+ * RCU is locked, node lock is set
+ */
+void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_l)
+{
+ struct tipc_link *snd_l = tipc_bc_sndlink(net);
+ struct sk_buff_head *inputq = &tipc_bc_base(net)->inputq;
+ struct sk_buff_head xmitq;
- bp_curr->primary = bp_temp[pri].primary;
+ __skb_queue_head_init(&xmitq);
- if (bp_temp[pri].secondary) {
- if (tipc_nmap_equal(&bp_temp[pri].primary->nodes,
- &bp_temp[pri].secondary->nodes)) {
- bp_curr->secondary = bp_temp[pri].secondary;
- } else {
- bp_curr++;
- bp_curr->primary = bp_temp[pri].secondary;
- }
- }
+ tipc_bcast_lock(net);
+ tipc_link_remove_bc_peer(snd_l, rcv_l, &xmitq);
+ tipc_bcbase_select_primary(net);
+ tipc_bcast_unlock(net);
- bp_curr++;
- }
+ tipc_bcbase_xmit(net, &xmitq);
- tipc_bclink_unlock(net);
+ /* Any socket wakeup messages ? */
+ if (!skb_queue_empty(inputq))
+ tipc_sk_rcv(net, inputq);
}
static int __tipc_nl_add_bc_link_stat(struct sk_buff *skb,
if (!bcl)
return 0;
- tipc_bclink_lock(net);
+ tipc_bcast_lock(net);
hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
NLM_F_MULTI, TIPC_NL_LINK_GET);
- if (!hdr)
+ if (!hdr) {
+ tipc_bcast_unlock(net);
return -EMSGSIZE;
+ }
attrs = nla_nest_start(msg->skb, TIPC_NLA_LINK);
if (!attrs)
goto attr_msg_full;
if (nla_put_string(msg->skb, TIPC_NLA_LINK_NAME, bcl->name))
goto attr_msg_full;
- if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, bcl->next_in_no))
+ if (nla_put_u32(msg->skb, TIPC_NLA_LINK_RX, bcl->rcv_nxt))
goto attr_msg_full;
- if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, bcl->next_out_no))
+ if (nla_put_u32(msg->skb, TIPC_NLA_LINK_TX, bcl->snd_nxt))
goto attr_msg_full;
prop = nla_nest_start(msg->skb, TIPC_NLA_LINK_PROP);
if (err)
goto attr_msg_full;
- tipc_bclink_unlock(net);
+ tipc_bcast_unlock(net);
nla_nest_end(msg->skb, attrs);
genlmsg_end(msg->skb, hdr);
attr_msg_full:
nla_nest_cancel(msg->skb, attrs);
msg_full:
- tipc_bclink_unlock(net);
+ tipc_bcast_unlock(net);
genlmsg_cancel(msg->skb, hdr);
return -EMSGSIZE;
if (!bcl)
return -ENOPROTOOPT;
- tipc_bclink_lock(net);
+ tipc_bcast_lock(net);
memset(&bcl->stats, 0, sizeof(bcl->stats));
- tipc_bclink_unlock(net);
+ tipc_bcast_unlock(net);
return 0;
}
-int tipc_bclink_set_queue_limits(struct net *net, u32 limit)
+static int tipc_bc_link_set_queue_limits(struct net *net, u32 limit)
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
- struct tipc_link *bcl = tn->bcl;
+ struct tipc_link *l = tipc_bc_sndlink(net);
- if (!bcl)
+ if (!l)
return -ENOPROTOOPT;
- if ((limit < TIPC_MIN_LINK_WIN) || (limit > TIPC_MAX_LINK_WIN))
+ if (limit < BCLINK_WIN_MIN)
+ limit = BCLINK_WIN_MIN;
+ if (limit > TIPC_MAX_LINK_WIN)
return -EINVAL;
-
- tipc_bclink_lock(net);
- tipc_link_set_queue_limits(bcl, limit);
- tipc_bclink_unlock(net);
+ tipc_bcast_lock(net);
+ tipc_link_set_queue_limits(l, limit);
+ tipc_bcast_unlock(net);
return 0;
}
-int tipc_bclink_init(struct net *net)
+int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[])
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
- struct tipc_bcbearer *bcbearer;
- struct tipc_bclink *bclink;
- struct tipc_link *bcl;
-
- bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC);
- if (!bcbearer)
- return -ENOMEM;
-
- bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC);
- if (!bclink) {
- kfree(bcbearer);
- return -ENOMEM;
- }
+ int err;
+ u32 win;
+ struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
- bcl = &bclink->link;
- bcbearer->bearer.media = &bcbearer->media;
- bcbearer->media.send_msg = tipc_bcbearer_send;
- sprintf(bcbearer->media.name, "tipc-broadcast");
-
- spin_lock_init(&bclink->lock);
- __skb_queue_head_init(&bcl->transmq);
- __skb_queue_head_init(&bcl->backlogq);
- __skb_queue_head_init(&bcl->deferdq);
- skb_queue_head_init(&bcl->wakeupq);
- bcl->next_out_no = 1;
- spin_lock_init(&bclink->node.lock);
- __skb_queue_head_init(&bclink->arrvq);
- skb_queue_head_init(&bclink->inputq);
- bcl->owner = &bclink->node;
- bcl->owner->net = net;
- bcl->mtu = MAX_PKT_DEFAULT_MCAST;
- tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT);
- bcl->bearer_id = MAX_BEARERS;
- rcu_assign_pointer(tn->bearer_list[MAX_BEARERS], &bcbearer->bearer);
- bcl->state = WORKING_WORKING;
- bcl->pmsg = (struct tipc_msg *)&bcl->proto_msg;
- msg_set_prevnode(bcl->pmsg, tn->own_addr);
- strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME);
- tn->bcbearer = bcbearer;
- tn->bclink = bclink;
- tn->bcl = bcl;
- return 0;
-}
+ if (!attrs[TIPC_NLA_LINK_PROP])
+ return -EINVAL;
-void tipc_bclink_stop(struct net *net)
-{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
+ err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP], props);
+ if (err)
+ return err;
- tipc_bclink_lock(net);
- tipc_link_purge_queues(tn->bcl);
- tipc_bclink_unlock(net);
+ if (!props[TIPC_NLA_PROP_WIN])
+ return -EOPNOTSUPP;
- RCU_INIT_POINTER(tn->bearer_list[BCBEARER], NULL);
- synchronize_net();
- kfree(tn->bcbearer);
- kfree(tn->bclink);
+ win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
+
+ return tipc_bc_link_set_queue_limits(net, win);
}
-/**
- * tipc_nmap_add - add a node to a node map
- */
-static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node)
+int tipc_bcast_init(struct net *net)
{
- int n = tipc_node(node);
- int w = n / WSIZE;
- u32 mask = (1 << (n % WSIZE));
+ struct tipc_net *tn = tipc_net(net);
+ struct tipc_bc_base *bb = NULL;
+ struct tipc_link *l = NULL;
- if ((nm_ptr->map[w] & mask) == 0) {
- nm_ptr->count++;
- nm_ptr->map[w] |= mask;
- }
+ bb = kzalloc(sizeof(*bb), GFP_ATOMIC);
+ if (!bb)
+ goto enomem;
+ tn->bcbase = bb;
+ spin_lock_init(&tipc_net(net)->bclock);
+
+ if (!tipc_link_bc_create(net, 0, 0,
+ U16_MAX,
+ BCLINK_WIN_DEFAULT,
+ 0,
+ &bb->inputq,
+ NULL,
+ NULL,
+ &l))
+ goto enomem;
+ bb->link = l;
+ tn->bcl = l;
+ return 0;
+enomem:
+ kfree(bb);
+ kfree(l);
+ return -ENOMEM;
}
-/**
- * tipc_nmap_remove - remove a node from a node map
- */
-static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node)
+void tipc_bcast_reinit(struct net *net)
{
- int n = tipc_node(node);
- int w = n / WSIZE;
- u32 mask = (1 << (n % WSIZE));
+ struct tipc_bc_base *b = tipc_bc_base(net);
- if ((nm_ptr->map[w] & mask) != 0) {
- nm_ptr->map[w] &= ~mask;
- nm_ptr->count--;
- }
+ msg_set_prevnode(b->link->pmsg, tipc_own_addr(net));
}
-/**
- * tipc_nmap_diff - find differences between node maps
- * @nm_a: input node map A
- * @nm_b: input node map B
- * @nm_diff: output node map A-B (i.e. nodes of A that are not in B)
- */
-static void tipc_nmap_diff(struct tipc_node_map *nm_a,
- struct tipc_node_map *nm_b,
- struct tipc_node_map *nm_diff)
+void tipc_bcast_stop(struct net *net)
{
- int stop = ARRAY_SIZE(nm_a->map);
- int w;
- int b;
- u32 map;
-
- memset(nm_diff, 0, sizeof(*nm_diff));
- for (w = 0; w < stop; w++) {
- map = nm_a->map[w] ^ (nm_a->map[w] & nm_b->map[w]);
- nm_diff->map[w] = map;
- if (map != 0) {
- for (b = 0 ; b < WSIZE; b++) {
- if (map & (1 << b))
- nm_diff->count++;
- }
- }
- }
+ struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+ synchronize_net();
+ kfree(tn->bcbase);
+ kfree(tn->bcl);
}
Code Review / kvmfornfv.git / blobdiff