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rxrpc: Extract the code from a received ABORT packet much earlier

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Extract the code from a received rx ABORT packet much earlier and in a
single place and harmonise the responses to malformed ABORT packets.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
This commit is contained in:
David Howells
2022-11-14 12:21:32 +00:00
parent 2cc800863c
commit f14febd8df
2 changed files with 20 additions and 23 deletions
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31
net/rxrpc/input.c
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@@ -1019,20 +1019,11 @@ static void rxrpc_input_ackall(struct rxrpc_call *call, struct sk_buff *skb)
static void rxrpc_input_abort(struct rxrpc_call *call, struct sk_buff *skb)
{
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
__be32 wtmp;
u32 abort_code = RX_CALL_DEAD;
_enter("");
if (skb->len >= 4 &&
skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
&wtmp, sizeof(wtmp)) >= 0)
abort_code = ntohl(wtmp);
trace_rxrpc_rx_abort(call, sp->hdr.serial, abort_code);
trace_rxrpc_rx_abort(call, sp->hdr.serial, skb->priority);
rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
abort_code, -ECONNABORTED);
skb->priority, -ECONNABORTED);
}
/*
@@ -1193,6 +1184,20 @@ int rxrpc_extract_header(struct rxrpc_skb_priv *sp, struct sk_buff *skb)
return 0;
}
/*
* Extract the abort code from an ABORT packet and stash it in skb->priority.
*/
static bool rxrpc_extract_abort(struct sk_buff *skb)
{
__be32 wtmp;
if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
&wtmp, sizeof(wtmp)) < 0)
return false;
skb->priority = ntohl(wtmp);
return true;
}
/*
* handle data received on the local endpoint
* - may be called in interrupt context
@@ -1264,8 +1269,10 @@ int rxrpc_input_packet(struct sock *udp_sk, struct sk_buff *skb)
case RXRPC_PACKET_TYPE_ACKALL:
if (sp->hdr.callNumber == 0)
goto bad_message;
fallthrough;
break;
case RXRPC_PACKET_TYPE_ABORT:
if (!rxrpc_extract_abort(skb))
return true; /* Just discard if malformed */
break;
case RXRPC_PACKET_TYPE_DATA: