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-rw-r--r--net/tipc/bcast.c111
1 files changed, 52 insertions, 59 deletions
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 759b318b5ff..28908f54459 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -39,6 +39,7 @@
#include "link.h"
#include "port.h"
#include "bcast.h"
+#include "name_distr.h"
#define MAX_PKT_DEFAULT_MCAST 1500 /* bcast link max packet size (fixed) */
@@ -298,14 +299,9 @@ static void bclink_send_nack(struct tipc_node *n_ptr)
msg_set_bcgap_to(msg, n_ptr->bclink.gap_to);
msg_set_bcast_tag(msg, tipc_own_tag);
- if (tipc_bearer_send(&bcbearer->bearer, buf, NULL)) {
- bcl->stats.sent_nacks++;
- buf_discard(buf);
- } else {
- tipc_bearer_schedule(bcl->b_ptr, bcl);
- bcl->proto_msg_queue = buf;
- bcl->stats.bearer_congs++;
- }
+ tipc_bearer_send(&bcbearer->bearer, buf, NULL);
+ bcl->stats.sent_nacks++;
+ buf_discard(buf);
/*
* Ensure we doesn't send another NACK msg to the node
@@ -426,20 +422,28 @@ int tipc_bclink_send_msg(struct sk_buff *buf)
void tipc_bclink_recv_pkt(struct sk_buff *buf)
{
struct tipc_msg *msg = buf_msg(buf);
- struct tipc_node *node = tipc_node_find(msg_prevnode(msg));
+ struct tipc_node *node;
u32 next_in;
u32 seqno;
struct sk_buff *deferred;
- if (unlikely(!node || !tipc_node_is_up(node) || !node->bclink.supported ||
- (msg_mc_netid(msg) != tipc_net_id))) {
- buf_discard(buf);
- return;
- }
+ /* Screen out unwanted broadcast messages */
+
+ if (msg_mc_netid(msg) != tipc_net_id)
+ goto exit;
+
+ node = tipc_node_find(msg_prevnode(msg));
+ if (unlikely(!node))
+ goto exit;
+
+ tipc_node_lock(node);
+ if (unlikely(!node->bclink.supported))
+ goto unlock;
if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) {
+ if (msg_type(msg) != STATE_MSG)
+ goto unlock;
if (msg_destnode(msg) == tipc_own_addr) {
- tipc_node_lock(node);
tipc_bclink_acknowledge(node, msg_bcast_ack(msg));
tipc_node_unlock(node);
spin_lock_bh(&bc_lock);
@@ -449,18 +453,18 @@ void tipc_bclink_recv_pkt(struct sk_buff *buf)
msg_bcgap_to(msg));
spin_unlock_bh(&bc_lock);
} else {
+ tipc_node_unlock(node);
tipc_bclink_peek_nack(msg_destnode(msg),
msg_bcast_tag(msg),
msg_bcgap_after(msg),
msg_bcgap_to(msg));
}
- buf_discard(buf);
- return;
+ goto exit;
}
- tipc_node_lock(node);
+ /* Handle in-sequence broadcast message */
+
receive:
- deferred = node->bclink.deferred_head;
next_in = mod(node->bclink.last_in + 1);
seqno = msg_seqno(msg);
@@ -474,7 +478,10 @@ receive:
}
if (likely(msg_isdata(msg))) {
tipc_node_unlock(node);
- tipc_port_recv_mcast(buf, NULL);
+ if (likely(msg_mcast(msg)))
+ tipc_port_recv_mcast(buf, NULL);
+ else
+ buf_discard(buf);
} else if (msg_user(msg) == MSG_BUNDLER) {
bcl->stats.recv_bundles++;
bcl->stats.recv_bundled += msg_msgcnt(msg);
@@ -487,18 +494,22 @@ receive:
bcl->stats.recv_fragmented++;
tipc_node_unlock(node);
tipc_net_route_msg(buf);
+ } else if (msg_user(msg) == NAME_DISTRIBUTOR) {
+ tipc_node_unlock(node);
+ tipc_named_recv(buf);
} else {
tipc_node_unlock(node);
- tipc_net_route_msg(buf);
+ buf_discard(buf);
}
+ buf = NULL;
+ tipc_node_lock(node);
+ deferred = node->bclink.deferred_head;
if (deferred && (buf_seqno(deferred) == mod(next_in + 1))) {
- tipc_node_lock(node);
buf = deferred;
msg = buf_msg(buf);
node->bclink.deferred_head = deferred->next;
goto receive;
}
- return;
} else if (less(next_in, seqno)) {
u32 gap_after = node->bclink.gap_after;
u32 gap_to = node->bclink.gap_to;
@@ -513,6 +524,7 @@ receive:
else if (less(gap_after, seqno) && less(seqno, gap_to))
node->bclink.gap_to = seqno;
}
+ buf = NULL;
if (bclink_ack_allowed(node->bclink.nack_sync)) {
if (gap_to != gap_after)
bclink_send_nack(node);
@@ -520,9 +532,11 @@ receive:
}
} else {
bcl->stats.duplicates++;
- buf_discard(buf);
}
+unlock:
tipc_node_unlock(node);
+exit:
+ buf_discard(buf);
}
u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr)
@@ -535,10 +549,11 @@ u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr)
/**
* tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer
*
- * Send through as many bearers as necessary to reach all nodes
- * that support TIPC multicasting.
+ * Send packet over as many bearers as necessary to reach all nodes
+ * that have joined the broadcast link.
*
- * Returns 0 if packet sent successfully, non-zero if not
+ * 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,
@@ -547,7 +562,12 @@ static int tipc_bcbearer_send(struct sk_buff *buf,
{
int bp_index;
- /* Prepare buffer for broadcasting (if first time trying to send it) */
+ /*
+ * 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;
@@ -596,18 +616,12 @@ static int tipc_bcbearer_send(struct sk_buff *buf,
}
if (bcbearer->remains_new.count == 0)
- return 0;
+ break; /* all targets reached */
bcbearer->remains = bcbearer->remains_new;
}
- /*
- * Unable to reach all targets (indicate success, since currently
- * there isn't code in place to properly block & unblock the
- * pseudo-bearer used by the broadcast link)
- */
-
- return TIPC_OK;
+ return 0;
}
/**
@@ -667,27 +681,6 @@ void tipc_bcbearer_sort(void)
spin_unlock_bh(&bc_lock);
}
-/**
- * tipc_bcbearer_push - resolve bearer congestion
- *
- * Forces bclink to push out any unsent packets, until all packets are gone
- * or congestion reoccurs.
- * No locks set when function called
- */
-
-void tipc_bcbearer_push(void)
-{
- struct tipc_bearer *b_ptr;
-
- spin_lock_bh(&bc_lock);
- b_ptr = &bcbearer->bearer;
- if (b_ptr->blocked) {
- b_ptr->blocked = 0;
- tipc_bearer_lock_push(b_ptr);
- }
- spin_unlock_bh(&bc_lock);
-}
-
int tipc_bclink_stats(char *buf, const u32 buf_size)
{
@@ -764,7 +757,7 @@ int tipc_bclink_init(void)
bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC);
bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC);
if (!bcbearer || !bclink) {
- warn("Multicast link creation failed, no memory\n");
+ warn("Broadcast link creation failed, no memory\n");
kfree(bcbearer);
bcbearer = NULL;
kfree(bclink);
@@ -775,7 +768,7 @@ int tipc_bclink_init(void)
INIT_LIST_HEAD(&bcbearer->bearer.cong_links);
bcbearer->bearer.media = &bcbearer->media;
bcbearer->media.send_msg = tipc_bcbearer_send;
- sprintf(bcbearer->media.name, "tipc-multicast");
+ sprintf(bcbearer->media.name, "tipc-broadcast");
bcl = &bclink->link;
INIT_LIST_HEAD(&bcl->waiting_ports);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 00:57:01 +0000