Commit ffe06c17 authored by Jiri Pirko's avatar Jiri Pirko Committed by David S. Miller
Browse files

filter: add XOR operation



Add XOR instruction fo BPF machine. Needed for computing packet hashes.
Signed-off-by: default avatarJiri Pirko <jpirko@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 302d6637
...@@ -126,7 +126,8 @@ struct sock_fprog { /* Required for SO_ATTACH_FILTER. */ ...@@ -126,7 +126,8 @@ struct sock_fprog { /* Required for SO_ATTACH_FILTER. */
#define SKF_AD_HATYPE 28 #define SKF_AD_HATYPE 28
#define SKF_AD_RXHASH 32 #define SKF_AD_RXHASH 32
#define SKF_AD_CPU 36 #define SKF_AD_CPU 36
#define SKF_AD_MAX 40 #define SKF_AD_ALU_XOR_X 40
#define SKF_AD_MAX 44
#define SKF_NET_OFF (-0x100000) #define SKF_NET_OFF (-0x100000)
#define SKF_LL_OFF (-0x200000) #define SKF_LL_OFF (-0x200000)
...@@ -231,6 +232,7 @@ enum { ...@@ -231,6 +232,7 @@ enum {
BPF_S_ANC_HATYPE, BPF_S_ANC_HATYPE,
BPF_S_ANC_RXHASH, BPF_S_ANC_RXHASH,
BPF_S_ANC_CPU, BPF_S_ANC_CPU,
BPF_S_ANC_ALU_XOR_X,
}; };
#endif /* __KERNEL__ */ #endif /* __KERNEL__ */
......
...@@ -315,6 +315,9 @@ load_b: ...@@ -315,6 +315,9 @@ load_b:
case BPF_S_ANC_CPU: case BPF_S_ANC_CPU:
A = raw_smp_processor_id(); A = raw_smp_processor_id();
continue; continue;
case BPF_S_ANC_ALU_XOR_X:
A ^= X;
continue;
case BPF_S_ANC_NLATTR: { case BPF_S_ANC_NLATTR: {
struct nlattr *nla; struct nlattr *nla;
...@@ -559,6 +562,7 @@ int sk_chk_filter(struct sock_filter *filter, unsigned int flen) ...@@ -559,6 +562,7 @@ int sk_chk_filter(struct sock_filter *filter, unsigned int flen)
ANCILLARY(HATYPE); ANCILLARY(HATYPE);
ANCILLARY(RXHASH); ANCILLARY(RXHASH);
ANCILLARY(CPU); ANCILLARY(CPU);
ANCILLARY(ALU_XOR_X);
} }
} }
ftest->code = code; ftest->code = code;
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment