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authorEric Dumazet <edumazet@google.com>2013-09-24 08:20:52 -0700
committerDavid S. Miller <davem@davemloft.net>2013-09-28 15:35:41 -0700
commit62748f32d501f5d3712a7c372bbb92abc7c62bc7 (patch)
tree847a6e4b66aaf012809ff8656476743e738f1a2b /arch/alpha/include/uapi
parent4aa0a03f519812f48ac48d046bc451e97649ec82 (diff)
downloadlinux-stericsson-62748f32d501f5d3712a7c372bbb92abc7c62bc7.tar.gz
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 <edumazet@google.com> Cc: Steinar H. Gunderson <sesse@google.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/alpha/include/uapi')
-rw-r--r--arch/alpha/include/uapi/asm/socket.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h
index 467de010ea7e..e3a1491d5073 100644
--- a/arch/alpha/include/uapi/asm/socket.h
+++ b/arch/alpha/include/uapi/asm/socket.h
@@ -81,6 +81,8 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_BUSY_POLL 46
+#define SO_BUSY_POLL 46
+
+#define SO_MAX_PACING_RATE 47
#endif /* _UAPI_ASM_SOCKET_H */