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| author | Paolo Abeni <pabeni@redhat.com> | 2023-06-20 19:30:17 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-06-22 08:45:57 +0300 |
| commit | 6f06b4d4d1cc676a3f9d947f931ec3866b6c4f6c (patch) | |
| tree | f1161c9ff3e94371b542f929e70b61d23350dc74 /net/mptcp/protocol.h | |
| parent | 5dcff89e14555a4ee6cfa132b82f7d13dcb1e80a (diff) | |
| download | linux-6f06b4d4d1cc676a3f9d947f931ec3866b6c4f6c.tar.xz | |
mptcp: add subflow unique id
The user-space need to properly account the data received/sent by
individual subflows. When additional subflows are created and/or
closed during the MPTCP socket lifetime, the information currently
exposed via MPTCP_TCPINFO are not enough: subflows are identified only
by the sequential position inside the info dumps, and that will change
with the above mentioned events.
To solve the above problem, this patch introduces a new subflow
identifier that is unique inside the given MPTCP socket scope.
The initial subflow get the id 1 and the other subflows get incremental
values at join time.
Link: https://github.com/multipath-tcp/mptcp_net-next/issues/388
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/mptcp/protocol.h')
| -rw-r--r-- | net/mptcp/protocol.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 27adfcc5aaa2..bb4cacd92778 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -323,7 +323,8 @@ struct mptcp_sock { u64 rtt_us; /* last maximum rtt of subflows */ } rcvq_space; - u32 setsockopt_seq; + u32 subflow_id; + u32 setsockopt_seq; char ca_name[TCP_CA_NAME_MAX]; struct mptcp_sock *dl_next; }; @@ -504,6 +505,8 @@ struct mptcp_subflow_context { u8 reset_reason:4; u8 stale_count; + u32 subflow_id; + long delegated_status; unsigned long fail_tout; |