path: root/arch/cris/include/uapi
diff options
authorEric Dumazet <>2013-09-24 08:20:52 -0700
committerDavid S. Miller <>2013-09-28 15:35:41 -0700
commit62748f32d501f5d3712a7c372bbb92abc7c62bc7 (patch)
tree847a6e4b66aaf012809ff8656476743e738f1a2b /arch/cris/include/uapi
parent4aa0a03f519812f48ac48d046bc451e97649ec82 (diff)
net: introduce SO_MAX_PACING_RATE
As mentioned in commit afe4fd062416b ("pkt_sched: fq: Fair Queue packet scheduler"), this patch adds a new socket option. SO_MAX_PACING_RATE offers the application the ability to cap the rate computed by transport layer. Value is in bytes per second. u32 val = 1000000; setsockopt(sockfd, SOL_SOCKET, SO_MAX_PACING_RATE, &val, sizeof(val)); To be effectively paced, a flow must use FQ packet scheduler. Note that a packet scheduler takes into account the headers for its computations. The effective payload rate depends on MSS and retransmits if any. I chose to make this pacing rate a SOL_SOCKET option instead of a TCP one because this can be used by other protocols. Signed-off-by: Eric Dumazet <> Cc: Steinar H. Gunderson <> Cc: Michael Kerrisk <> Signed-off-by: David S. Miller <>
Diffstat (limited to 'arch/cris/include/uapi')
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/cris/include/uapi/asm/socket.h b/arch/cris/include/uapi/asm/socket.h
index eb723e51554e..13829aaaeec5 100644
--- a/arch/cris/include/uapi/asm/socket.h
+++ b/arch/cris/include/uapi/asm/socket.h
@@ -78,6 +78,8 @@
#define SO_BUSY_POLL 46
+#define SO_MAX_PACING_RATE 47
#endif /* _ASM_SOCKET_H */