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Kernel
提交 b1d95ae5 编写于 作者: R Ray Bellis 提交者： David S. Miller
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tools, bpf_asm: simplify parser rule for BPF extensions 

We can already use yylval in the lexer for encoding the BPF extension
number, so that the parser rules can be further reduced to a single one
for each B/H/W case.
Signed-off-by: NRay Bellis <ray@isc.org>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 0c71de66
隐藏空白更改
内联 并排
Showing with 79 addition and 151 deletion
tools/net/bpf_exp.l
浏览文件 @ b1d95ae5
...@@ -23,6 +23,9 @@ ...@@ -23,6 +23,9 @@
#include <stdio.h> #include <stdio.h>
#include <stdint.h> #include <stdint.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
#include <linux/filter.h>
#include "bpf_exp.yacc.h" #include "bpf_exp.yacc.h"
...@@ -79,22 +82,71 @@ extern void yyerror(const char *str); ...@@ -79,22 +82,71 @@ extern void yyerror(const char *str);
"txa" { return OP_TXA; } "txa" { return OP_TXA; }
"#"?("len") { return K_PKT_LEN; } "#"?("len") { return K_PKT_LEN; }
"#"?("proto") { return K_PROTO; }
"#"?("type") { return K_TYPE; } "#"?("proto") {
"#"?("poff") { return K_POFF; } yylval.number = SKF_AD_PROTOCOL;
"#"?("ifidx") { return K_IFIDX; } return extension;
"#"?("nla") { return K_NLATTR; } }
"#"?("nlan") { return K_NLATTR_NEST; } "#"?("type") {
"#"?("mark") { return K_MARK; } yylval.number = SKF_AD_PKTTYPE;
"#"?("queue") { return K_QUEUE; } return extension;
"#"?("hatype") { return K_HATYPE; } }
"#"?("rxhash") { return K_RXHASH; } "#"?("poff") {
"#"?("cpu") { return K_CPU; } yylval.number = SKF_AD_PAY_OFFSET;
"#"?("vlan_tci") { return K_VLAN_TCI; } return extension;
"#"?("vlan_pr") { return K_VLAN_AVAIL; } }
"#"?("vlan_avail") { return K_VLAN_AVAIL; } "#"?("ifidx") {
"#"?("vlan_tpid") { return K_VLAN_TPID; } yylval.number = SKF_AD_IFINDEX;
"#"?("rand") { return K_RAND; } return extension;
}
"#"?("nla") {
yylval.number = SKF_AD_NLATTR;
return extension;
}
"#"?("nlan") {
yylval.number = SKF_AD_NLATTR_NEST;
return extension;
}
"#"?("mark") {
yylval.number = SKF_AD_MARK;
return extension;
}
"#"?("queue") {
yylval.number = SKF_AD_QUEUE;
return extension;
}
"#"?("hatype") {
yylval.number = SKF_AD_HATYPE;
return extension;
}
"#"?("rxhash") {
yylval.number = SKF_AD_RXHASH;
return extension;
}
"#"?("cpu") {
yylval.number = SKF_AD_CPU;
return extension;
}
"#"?("vlan_tci") {
yylval.number = SKF_AD_VLAN_TAG;
return extension;
}
"#"?("vlan_pr") {
yylval.number = SKF_AD_VLAN_TAG_PRESENT;
return extension;
}
"#"?("vlan_avail") {
yylval.number = SKF_AD_VLAN_TAG_PRESENT;
return extension;
}
"#"?("vlan_tpid") {
yylval.number = SKF_AD_VLAN_TPID;
return extension;
}
"#"?("rand") {
yylval.number = SKF_AD_RANDOM;
return extension;
}
":" { return ':'; } ":" { return ':'; }
"," { return ','; } "," { return ','; }
......
tools/net/bpf_exp.y
浏览文件 @ b1d95ae5
...@@ -35,6 +35,7 @@ ...@@ -35,6 +35,7 @@
enum jmp_type { JTL, JFL, JKL }; enum jmp_type { JTL, JFL, JKL };
extern FILE *yyin; extern FILE *yyin;
extern int yylineno;
extern int yylex(void); extern int yylex(void);
extern void yyerror(const char *str); extern void yyerror(const char *str);
...@@ -55,14 +56,14 @@ static void bpf_set_jmp_label(char *label, enum jmp_type type); ...@@ -55,14 +56,14 @@ static void bpf_set_jmp_label(char *label, enum jmp_type type);
%token OP_RET OP_TAX OP_TXA OP_LDXB OP_MOD OP_NEG OP_JNEQ OP_JLT OP_JLE OP_LDI %token OP_RET OP_TAX OP_TXA OP_LDXB OP_MOD OP_NEG OP_JNEQ OP_JLT OP_JLE OP_LDI
%token OP_LDXI %token OP_LDXI
%token K_PKT_LEN K_PROTO K_TYPE K_NLATTR K_NLATTR_NEST K_MARK K_QUEUE K_HATYPE %token K_PKT_LEN
%token K_RXHASH K_CPU K_IFIDX K_VLAN_TCI K_VLAN_AVAIL K_VLAN_TPID K_POFF K_RAND
%token ':' ',' '[' ']' '(' ')' 'x' 'a' '+' 'M' '*' '&' '#' '%' %token ':' ',' '[' ']' '(' ')' 'x' 'a' '+' 'M' '*' '&' '#' '%'
%token number label %token extension number label
%type <label> label %type <label> label
%type <number> extension
%type <number> number %type <number> number
%% %%
...@@ -125,51 +126,9 @@ ldb ...@@ -125,51 +126,9 @@ ldb
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_IND, 0, 0, $6); } bpf_set_curr_instr(BPF_LD | BPF_B | BPF_IND, 0, 0, $6); }
| OP_LDB '[' number ']' { | OP_LDB '[' number ']' {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0, $3); } bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0, $3); }
| OP_LDB K_PROTO { | OP_LDB extension {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0, bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PROTOCOL); } SKF_AD_OFF + $2); }
| OP_LDB K_TYPE {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PKTTYPE); }
| OP_LDB K_IFIDX {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_IFINDEX); }
| OP_LDB K_NLATTR {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_NLATTR); }
| OP_LDB K_NLATTR_NEST {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_NLATTR_NEST); }
| OP_LDB K_MARK {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_MARK); }
| OP_LDB K_QUEUE {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_QUEUE); }
| OP_LDB K_HATYPE {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_HATYPE); }
| OP_LDB K_RXHASH {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_RXHASH); }
| OP_LDB K_CPU {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_CPU); }
| OP_LDB K_VLAN_TCI {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_VLAN_TAG); }
| OP_LDB K_VLAN_AVAIL {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_VLAN_TAG_PRESENT); }
| OP_LDB K_POFF {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PAY_OFFSET); }
| OP_LDB K_RAND {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_RANDOM); }
| OP_LDB K_VLAN_TPID {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_VLAN_TPID); }
; ;
ldh ldh
...@@ -179,51 +138,9 @@ ldh ...@@ -179,51 +138,9 @@ ldh
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_IND, 0, 0, $6); } bpf_set_curr_instr(BPF_LD | BPF_H | BPF_IND, 0, 0, $6); }
| OP_LDH '[' number ']' { | OP_LDH '[' number ']' {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0, $3); } bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0, $3); }
| OP_LDH K_PROTO { | OP_LDH extension {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PROTOCOL); }
| OP_LDH K_TYPE {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PKTTYPE); }
| OP_LDH K_IFIDX {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_IFINDEX); }
| OP_LDH K_NLATTR {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_NLATTR); }
| OP_LDH K_NLATTR_NEST {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_NLATTR_NEST); }
| OP_LDH K_MARK {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_MARK); }
| OP_LDH K_QUEUE {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_QUEUE); }
| OP_LDH K_HATYPE {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0, bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_HATYPE); } SKF_AD_OFF + $2); }
| OP_LDH K_RXHASH {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_RXHASH); }
| OP_LDH K_CPU {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_CPU); }
| OP_LDH K_VLAN_TCI {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_VLAN_TAG); }
| OP_LDH K_VLAN_AVAIL {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_VLAN_TAG_PRESENT); }
| OP_LDH K_POFF {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PAY_OFFSET); }
| OP_LDH K_RAND {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_RANDOM); }
| OP_LDH K_VLAN_TPID {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_VLAN_TPID); }
; ;
ldi ldi
...@@ -238,51 +155,9 @@ ld ...@@ -238,51 +155,9 @@ ld
bpf_set_curr_instr(BPF_LD | BPF_IMM, 0, 0, $3); } bpf_set_curr_instr(BPF_LD | BPF_IMM, 0, 0, $3); }
| OP_LD K_PKT_LEN { | OP_LD K_PKT_LEN {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_LEN, 0, 0, 0); } bpf_set_curr_instr(BPF_LD | BPF_W | BPF_LEN, 0, 0, 0); }
| OP_LD K_PROTO { | OP_LD extension {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PROTOCOL); }
| OP_LD K_TYPE {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PKTTYPE); }
| OP_LD K_IFIDX {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_IFINDEX); }
| OP_LD K_NLATTR {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_NLATTR); }
| OP_LD K_NLATTR_NEST {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_NLATTR_NEST); }
| OP_LD K_MARK {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_MARK); }
| OP_LD K_QUEUE {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_QUEUE); }
| OP_LD K_HATYPE {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_HATYPE); }
| OP_LD K_RXHASH {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_RXHASH); }
| OP_LD K_CPU {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_CPU); }
| OP_LD K_VLAN_TCI {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_VLAN_TAG); }
| OP_LD K_VLAN_AVAIL {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_VLAN_TAG_PRESENT); }
| OP_LD K_POFF {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PAY_OFFSET); }
| OP_LD K_RAND {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_RANDOM); }
| OP_LD K_VLAN_TPID {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0, bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_VLAN_TPID); } SKF_AD_OFF + $2); }
| OP_LD 'M' '[' number ']' { | OP_LD 'M' '[' number ']' {
bpf_set_curr_instr(BPF_LD | BPF_MEM, 0, 0, $4); } bpf_set_curr_instr(BPF_LD | BPF_MEM, 0, 0, $4); }
| OP_LD '[' 'x' '+' number ']' { | OP_LD '[' 'x' '+' number ']' {
...@@ -776,5 +651,6 @@ void bpf_asm_compile(FILE *fp, bool cstyle) ...@@ -776,5 +651,6 @@ void bpf_asm_compile(FILE *fp, bool cstyle)
void yyerror(const char *str) void yyerror(const char *str)
{ {
fprintf(stderr, "error: %s at line %d\n", str, yylineno);
exit(1); exit(1);
} }
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