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| author | Eric Dumazet <edumazet@google.com> | 2013-09-24 19:20:52 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-09-29 02:35:41 +0400 |
| commit | 62748f32d501f5d3712a7c372bbb92abc7c62bc7 (patch) | |
| tree | 847a6e4b66aaf012809ff8656476743e738f1a2b /include/uapi/asm-generic | |
| parent | 4aa0a03f519812f48ac48d046bc451e97649ec82 (diff) | |
| download | linux-62748f32d501f5d3712a7c372bbb92abc7c62bc7.tar.xz | |
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 'include/uapi/asm-generic')
| -rw-r--r-- | include/uapi/asm-generic/socket.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h index f04b69b6abf2..38f14d0264c3 100644 --- a/include/uapi/asm-generic/socket.h +++ b/include/uapi/asm-generic/socket.h @@ -78,4 +78,6 @@ #define SO_BUSY_POLL 46 +#define SO_MAX_PACING_RATE 47 + #endif /* __ASM_GENERIC_SOCKET_H */ |