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rxrpc: Add config to inject packet loss

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Add a configuration option to inject packet loss by discarding
approximately every 8th packet received and approximately every 8th DATA
packet transmitted.

Note that no locking is used, but it shouldn't really matter.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2016-09-17 10:49:15 +01:00
parent 71f3ca408f
commit 8a681c3605
3 changed files with 24 additions and 0 deletions
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9
net/rxrpc/output.c
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@@ -225,6 +225,15 @@ int rxrpc_send_data_packet(struct rxrpc_connection *conn, struct sk_buff *skb)
msg.msg_controllen = 0;
msg.msg_flags = 0;
if (IS_ENABLED(CONFIG_AF_RXRPC_INJECT_LOSS)) {
static int lose;
if ((lose++ & 7) == 7) {
rxrpc_lose_skb(skb, rxrpc_skb_tx_lost);
_leave(" = 0 [lose]");
return 0;
}
}
/* send the packet with the don't fragment bit set if we currently
* think it's small enough */
if (skb->len - sizeof(struct rxrpc_wire_header) < conn->params.peer->maxdata) {