[PATCH 2/4] librdamcm/rsocket: Handle TCP_MAXSEG socket option
From: Hefty, Sean <hidden>
Date: 2012-06-06 18:42:02
Subsystem:
the rest · Maintainer:
Linus Torvalds
netperf uses the TCP_MAXSEG socket option. Add support for it. Problem reported by Sridhar Samudrala [off-list ref] getsockopt returns the path MTU as the TCP_MAXSEG. setsockopt currently ignores the value. Signed-off-by: Sean Hefty <redacted> --- src/rsocket.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/src/rsocket.c b/src/rsocket.c
index 8f20b4a..2fd106a 100644
--- a/src/rsocket.c
+++ b/src/rsocket.c@@ -1716,6 +1716,9 @@ int rsetsockopt(int socket, int level, int optname, opt_on = *(int *) optval; ret = 0; break; + case TCP_MAXSEG: + ret = 0; + break; default: break; }
@@ -1802,6 +1805,12 @@ int rgetsockopt(int socket, int level, int optname, *((int *) optval) = !!(rs->tcp_opts & (1 << optname)); *optlen = sizeof(int); break; + case TCP_MAXSEG: + *((int *) optval) = (rs->cm_id && rs->cm_id->route.num_paths) ? + 1 << (7 + rs->cm_id->route.path_rec->mtu) : + 2048; + *optlen = sizeof(int); + break; default: ret = ENOTSUP; break; --
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