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| author | David Howells <dhowells@redhat.com> | 2018-03-30 21:04:43 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2018-03-30 21:04:43 +0100 |
| commit | 03877bf6a30cca7d4bc3ffabd3c3e9464a7a1a19 (patch) | |
| tree | 5592f86c9ada53d5c46d2653f91b50714c939dee | |
| parent | f82eb88b0fa6943f58760fd7c3d1b12c1f9cf492 (diff) | |
| download | linux-03877bf6a30cca7d4bc3ffabd3c3e9464a7a1a19.tar.gz | |
rxrpc: Fix Tx ring annotation after initial Tx failure
rxrpc calls have a ring of packets that are awaiting ACK or retransmission
and a parallel ring of annotations that tracks the state of those packets.
If the initial transmission of a packet on the underlying UDP socket fails
then the packet annotation is marked for resend - but the setting of this
mark accidentally erases the last-packet mark also stored in the same
annotation slot. If this happens, a call won't switch out of the Tx phase
when all the packets have been transmitted.
Fix this by retaining the last-packet mark and only altering the packet
state.
Fixes: 248f219cb8bc ("rxrpc: Rewrite the data and ack handling code")
Signed-off-by: David Howells <dhowells@redhat.com>
| -rw-r--r-- | net/rxrpc/sendmsg.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c index 8503f279b467..783c777fc6e7 100644 --- a/net/rxrpc/sendmsg.c +++ b/net/rxrpc/sendmsg.c @@ -130,7 +130,9 @@ static inline void rxrpc_instant_resend(struct rxrpc_call *call, int ix) spin_lock_bh(&call->lock); if (call->state < RXRPC_CALL_COMPLETE) { - call->rxtx_annotations[ix] = RXRPC_TX_ANNO_RETRANS; + call->rxtx_annotations[ix] = + (call->rxtx_annotations[ix] & RXRPC_TX_ANNO_LAST) | + RXRPC_TX_ANNO_RETRANS; if (!test_and_set_bit(RXRPC_CALL_EV_RESEND, &call->events)) rxrpc_queue_call(call); } |