diff options
author | David Howells <dhowells@redhat.com> | 2016-09-22 02:29:31 +0300 |
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committer | David Howells <dhowells@redhat.com> | 2016-09-22 10:21:24 +0300 |
commit | 50235c4b5a2fb9a9690f02cd1dea6ca047d7f79e (patch) | |
tree | 3dc5a178820b16d5eaef0484fe7751cb4f71375e /net/rxrpc/ar-internal.h | |
parent | 77f2efcbdd7133466060198e02c6e8a170c3cd14 (diff) | |
download | linux-50235c4b5a2fb9a9690f02cd1dea6ca047d7f79e.tar.xz |
rxrpc: Obtain RTT data by requesting ACKs on DATA packets
In addition to sending a PING ACK to gain RTT data, we can set the
RXRPC_REQUEST_ACK flag on a DATA packet and get a REQUESTED-ACK ACK. The
ACK packet contains the serial number of the packet it is in response to,
so we can look through the Tx buffer for a matching DATA packet.
This requires that the data packets be stamped with the time of
transmission as a ktime rather than having the resend_at time in jiffies.
This further requires the resend code to do the resend determination in
ktimes and convert to jiffies to set the timer.
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc/ar-internal.h')
-rw-r--r-- | net/rxrpc/ar-internal.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h index 8b47f468eb9d..1c4597b2c6cd 100644 --- a/net/rxrpc/ar-internal.h +++ b/net/rxrpc/ar-internal.h @@ -142,10 +142,7 @@ struct rxrpc_host_header { */ struct rxrpc_skb_priv { union { - unsigned long resend_at; /* time in jiffies at which to resend */ - struct { - u8 nr_jumbo; /* Number of jumbo subpackets */ - }; + u8 nr_jumbo; /* Number of jumbo subpackets */ }; union { unsigned int offset; /* offset into buffer of next read */ @@ -663,6 +660,7 @@ extern const char rxrpc_recvmsg_traces[rxrpc_recvmsg__nr_trace][5]; enum rxrpc_rtt_tx_trace { rxrpc_rtt_tx_ping, + rxrpc_rtt_tx_data, rxrpc_rtt_tx__nr_trace }; @@ -670,6 +668,7 @@ extern const char rxrpc_rtt_tx_traces[rxrpc_rtt_tx__nr_trace][5]; enum rxrpc_rtt_rx_trace { rxrpc_rtt_rx_ping_response, + rxrpc_rtt_rx_requested_ack, rxrpc_rtt_rx__nr_trace }; |