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rxrpc: Extract useful fields from a received ACK to skb priv data

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Extract useful fields from a received ACK packet into the skb private data
early on in the process of parsing incoming packets.  This makes the ACK
fields available even before we've matched the ACK up to a call and will
allow us to deal with path MTU discovery probe responses even after the
relevant call has been completed.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: "David S. Miller" <davem@davemloft.net>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: linux-afs@lists.infradead.org
cc: netdev@vger.kernel.org
This commit is contained in:
David Howells
2024-02-01 10:29:36 +00:00
parent 37473e4162
commit 4b68137a20
4 changed files with 44 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
net/rxrpc/io_thread.c
View File

@@ -124,6 +124,7 @@ static bool rxrpc_extract_header(struct rxrpc_skb_priv *sp,
struct sk_buff *skb)
{
struct rxrpc_wire_header whdr;
struct rxrpc_ackpacket ack;
/* dig out the RxRPC connection details */
if (skb_copy_bits(skb, 0, &whdr, sizeof(whdr)) < 0)
@@ -141,6 +142,16 @@ static bool rxrpc_extract_header(struct rxrpc_skb_priv *sp,
sp->hdr.securityIndex = whdr.securityIndex;
sp->hdr._rsvd = ntohs(whdr._rsvd);
sp->hdr.serviceId = ntohs(whdr.serviceId);
if (sp->hdr.type == RXRPC_PACKET_TYPE_ACK) {
if (skb_copy_bits(skb, sizeof(whdr), &ack, sizeof(ack)) < 0)
return rxrpc_bad_message(skb, rxrpc_badmsg_short_ack);
sp->ack.first_ack = ntohl(ack.firstPacket);
sp->ack.prev_ack = ntohl(ack.previousPacket);
sp->ack.acked_serial = ntohl(ack.serial);
sp->ack.reason = ack.reason;
sp->ack.nr_acks = ack.nAcks;
}
return true;
}