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| author | Gao Feng <fgao@ikuai8.com> | 2016-08-09 12:38:24 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-08-10 17:22:14 -0700 |
| commit | ab10dccb11608b96b43b557c12a5ad867723e503 (patch) | |
| tree | db7883359e3748a0789ca78d85c97dbd480e7911 /include/net/pptp.h | |
| parent | 084c9535aab61ddd0e55eb796baa6b078b3843b1 (diff) | |
| download | lwn-ab10dccb11608b96b43b557c12a5ad867723e503.tar.gz lwn-ab10dccb11608b96b43b557c12a5ad867723e503.zip | |
rps: Inspect PPTP encapsulated by GRE to get flow hash
The PPTP is encapsulated by GRE header with that GRE_VERSION bits
must contain one. But current GRE RPS needs the GRE_VERSION must be
zero. So RPS does not work for PPTP traffic.
In my test environment, there are four MIPS cores, and all traffic
are passed through by PPTP. As a result, only one core is 100% busy
while other three cores are very idle. After this patch, the usage
of four cores are balanced well.
Signed-off-by: Gao Feng <fgao@ikuai8.com>
Reviewed-by: Philip Prindeville <philipp@redfish-solutions.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/pptp.h')
| -rw-r--r-- | include/net/pptp.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/include/net/pptp.h b/include/net/pptp.h new file mode 100644 index 000000000000..301d3e2ba1f9 --- /dev/null +++ b/include/net/pptp.h @@ -0,0 +1,40 @@ +#ifndef _NET_PPTP_H +#define _NET_PPTP_H + +#define PPP_LCP_ECHOREQ 0x09 +#define PPP_LCP_ECHOREP 0x0A +#define SC_RCV_BITS (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP) + +#define MISSING_WINDOW 20 +#define WRAPPED(curseq, lastseq)\ + ((((curseq) & 0xffffff00) == 0) &&\ + (((lastseq) & 0xffffff00) == 0xffffff00)) + +#define PPTP_GRE_PROTO 0x880B +#define PPTP_GRE_VER 0x1 + +#define PPTP_GRE_FLAG_C 0x80 +#define PPTP_GRE_FLAG_R 0x40 +#define PPTP_GRE_FLAG_K 0x20 +#define PPTP_GRE_FLAG_S 0x10 +#define PPTP_GRE_FLAG_A 0x80 + +#define PPTP_GRE_IS_C(f) ((f)&PPTP_GRE_FLAG_C) +#define PPTP_GRE_IS_R(f) ((f)&PPTP_GRE_FLAG_R) +#define PPTP_GRE_IS_K(f) ((f)&PPTP_GRE_FLAG_K) +#define PPTP_GRE_IS_S(f) ((f)&PPTP_GRE_FLAG_S) +#define PPTP_GRE_IS_A(f) ((f)&PPTP_GRE_FLAG_A) + +#define PPTP_HEADER_OVERHEAD (2+sizeof(struct pptp_gre_header)) +struct pptp_gre_header { + u8 flags; + u8 ver; + __be16 protocol; + __be16 payload_len; + __be16 call_id; + __be32 seq; + __be32 ack; +} __packed; + + +#endif |