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rxrpc: Improve jumbo packet counting

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Improve the information stored about jumbo packets so that we don't need to
reparse them so much later.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeffrey Altman <jaltman@auristor.com>
This commit is contained in:
David Howells
2019-08-19 09:25:37 +01:00
parent cfef46d692
commit c3c9e3df49
3 changed files with 30 additions and 12 deletions
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9
net/rxrpc/protocol.h
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@@ -89,6 +89,15 @@ struct rxrpc_jumbo_header {
#define RXRPC_JUMBO_DATALEN 1412 /* non-terminal jumbo packet data length */
#define RXRPC_JUMBO_SUBPKTLEN (RXRPC_JUMBO_DATALEN + sizeof(struct rxrpc_jumbo_header))
/*
* The maximum number of subpackets that can possibly fit in a UDP packet is:
*
* ((max_IP - IP_hdr - UDP_hdr) / RXRPC_JUMBO_SUBPKTLEN) + 1
* = ((65535 - 28 - 28) / 1416) + 1
* = 46 non-terminal packets and 1 terminal packet.
*/
#define RXRPC_MAX_NR_JUMBO 47
/*****************************************************************************/
/*
* on-the-wire Rx ACK packet data payload