[PATCH net-next 1/5] net: filter: remove DL macro
From: Daniel Borkmann <hidden>
Date: 2014-05-23 16:44:07
Subsystem:
bpf [core], bpf [general] (safe dynamic programs and tools), bpf [networking] (tcx & tc bpf, sock_addr), networking [general], the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Martin KaFai Lau, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Lets get rid of this macro. After commit 5bcfedf06f7f ("net: filter:
simplify label names from jump-table"), labels have become more
readable due to omission of BPF_ prefix but at the same time more
generic, so that things like `git grep -n` would not find them. As
a middle path, lets get rid of the DL macro as it's not strictly
needed and would otherwise just hide the full name.
Signed-off-by: Daniel Borkmann <redacted>
Acked-by: Alexei Starovoitov <redacted>
---
include/linux/filter.h | 3 -
net/core/filter.c | 193 +++++++++++++++++++++++++------------------------
2 files changed, 99 insertions(+), 97 deletions(-)
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 7977b39..2b0056a 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h@@ -37,9 +37,6 @@ #define BPF_CALL 0x80 /* function call */ #define BPF_EXIT 0x90 /* function return */ -/* Placeholder/dummy for 0 */ -#define BPF_0 0 - /* Register numbers */ enum { BPF_REG_0 = 0,
diff --git a/net/core/filter.c b/net/core/filter.c
index 7067cb2..b3b0889 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c@@ -160,95 +160,100 @@ static unsigned int __sk_run_filter(void *ctx, const struct sock_filter_int *ins static const void *jumptable[256] = { [0 ... 255] = &&default_label, /* Now overwrite non-defaults ... */ -#define DL(A, B, C) [BPF_##A|BPF_##B|BPF_##C] = &&A##_##B##_##C - DL(ALU, ADD, X), - DL(ALU, ADD, K), - DL(ALU, SUB, X), - DL(ALU, SUB, K), - DL(ALU, AND, X), - DL(ALU, AND, K), - DL(ALU, OR, X), - DL(ALU, OR, K), - DL(ALU, LSH, X), - DL(ALU, LSH, K), - DL(ALU, RSH, X), - DL(ALU, RSH, K), - DL(ALU, XOR, X), - DL(ALU, XOR, K), - DL(ALU, MUL, X), - DL(ALU, MUL, K), - DL(ALU, MOV, X), - DL(ALU, MOV, K), - DL(ALU, DIV, X), - DL(ALU, DIV, K), - DL(ALU, MOD, X), - DL(ALU, MOD, K), - DL(ALU, NEG, 0), - DL(ALU, END, TO_BE), - DL(ALU, END, TO_LE), - DL(ALU64, ADD, X), - DL(ALU64, ADD, K), - DL(ALU64, SUB, X), - DL(ALU64, SUB, K), - DL(ALU64, AND, X), - DL(ALU64, AND, K), - DL(ALU64, OR, X), - DL(ALU64, OR, K), - DL(ALU64, LSH, X), - DL(ALU64, LSH, K), - DL(ALU64, RSH, X), - DL(ALU64, RSH, K), - DL(ALU64, XOR, X), - DL(ALU64, XOR, K), - DL(ALU64, MUL, X), - DL(ALU64, MUL, K), - DL(ALU64, MOV, X), - DL(ALU64, MOV, K), - DL(ALU64, ARSH, X), - DL(ALU64, ARSH, K), - DL(ALU64, DIV, X), - DL(ALU64, DIV, K), - DL(ALU64, MOD, X), - DL(ALU64, MOD, K), - DL(ALU64, NEG, 0), - DL(JMP, CALL, 0), - DL(JMP, JA, 0), - DL(JMP, JEQ, X), - DL(JMP, JEQ, K), - DL(JMP, JNE, X), - DL(JMP, JNE, K), - DL(JMP, JGT, X), - DL(JMP, JGT, K), - DL(JMP, JGE, X), - DL(JMP, JGE, K), - DL(JMP, JSGT, X), - DL(JMP, JSGT, K), - DL(JMP, JSGE, X), - DL(JMP, JSGE, K), - DL(JMP, JSET, X), - DL(JMP, JSET, K), - DL(JMP, EXIT, 0), - DL(STX, MEM, B), - DL(STX, MEM, H), - DL(STX, MEM, W), - DL(STX, MEM, DW), - DL(STX, XADD, W), - DL(STX, XADD, DW), - DL(ST, MEM, B), - DL(ST, MEM, H), - DL(ST, MEM, W), - DL(ST, MEM, DW), - DL(LDX, MEM, B), - DL(LDX, MEM, H), - DL(LDX, MEM, W), - DL(LDX, MEM, DW), - DL(LD, ABS, W), - DL(LD, ABS, H), - DL(LD, ABS, B), - DL(LD, IND, W), - DL(LD, IND, H), - DL(LD, IND, B), -#undef DL + /* 32 bit ALU operations */ + [BPF_ALU | BPF_ADD | BPF_X] = &&ALU_ADD_X, + [BPF_ALU | BPF_ADD | BPF_K] = &&ALU_ADD_K, + [BPF_ALU | BPF_SUB | BPF_X] = &&ALU_SUB_X, + [BPF_ALU | BPF_SUB | BPF_K] = &&ALU_SUB_K, + [BPF_ALU | BPF_AND | BPF_X] = &&ALU_AND_X, + [BPF_ALU | BPF_AND | BPF_K] = &&ALU_AND_K, + [BPF_ALU | BPF_OR | BPF_X] = &&ALU_OR_X, + [BPF_ALU | BPF_OR | BPF_K] = &&ALU_OR_K, + [BPF_ALU | BPF_LSH | BPF_X] = &&ALU_LSH_X, + [BPF_ALU | BPF_LSH | BPF_K] = &&ALU_LSH_K, + [BPF_ALU | BPF_RSH | BPF_X] = &&ALU_RSH_X, + [BPF_ALU | BPF_RSH | BPF_K] = &&ALU_RSH_K, + [BPF_ALU | BPF_XOR | BPF_X] = &&ALU_XOR_X, + [BPF_ALU | BPF_XOR | BPF_K] = &&ALU_XOR_K, + [BPF_ALU | BPF_MUL | BPF_X] = &&ALU_MUL_X, + [BPF_ALU | BPF_MUL | BPF_K] = &&ALU_MUL_K, + [BPF_ALU | BPF_MOV | BPF_X] = &&ALU_MOV_X, + [BPF_ALU | BPF_MOV | BPF_K] = &&ALU_MOV_K, + [BPF_ALU | BPF_DIV | BPF_X] = &&ALU_DIV_X, + [BPF_ALU | BPF_DIV | BPF_K] = &&ALU_DIV_K, + [BPF_ALU | BPF_MOD | BPF_X] = &&ALU_MOD_X, + [BPF_ALU | BPF_MOD | BPF_K] = &&ALU_MOD_K, + [BPF_ALU | BPF_NEG] = &&ALU_NEG, + [BPF_ALU | BPF_END | BPF_TO_BE] = &&ALU_END_TO_BE, + [BPF_ALU | BPF_END | BPF_TO_LE] = &&ALU_END_TO_LE, + /* 64 bit ALU operations */ + [BPF_ALU64 | BPF_ADD | BPF_X] = &&ALU64_ADD_X, + [BPF_ALU64 | BPF_ADD | BPF_K] = &&ALU64_ADD_K, + [BPF_ALU64 | BPF_SUB | BPF_X] = &&ALU64_SUB_X, + [BPF_ALU64 | BPF_SUB | BPF_K] = &&ALU64_SUB_K, + [BPF_ALU64 | BPF_AND | BPF_X] = &&ALU64_AND_X, + [BPF_ALU64 | BPF_AND | BPF_K] = &&ALU64_AND_K, + [BPF_ALU64 | BPF_OR | BPF_X] = &&ALU64_OR_X, + [BPF_ALU64 | BPF_OR | BPF_K] = &&ALU64_OR_K, + [BPF_ALU64 | BPF_LSH | BPF_X] = &&ALU64_LSH_X, + [BPF_ALU64 | BPF_LSH | BPF_K] = &&ALU64_LSH_K, + [BPF_ALU64 | BPF_RSH | BPF_X] = &&ALU64_RSH_X, + [BPF_ALU64 | BPF_RSH | BPF_K] = &&ALU64_RSH_K, + [BPF_ALU64 | BPF_XOR | BPF_X] = &&ALU64_XOR_X, + [BPF_ALU64 | BPF_XOR | BPF_K] = &&ALU64_XOR_K, + [BPF_ALU64 | BPF_MUL | BPF_X] = &&ALU64_MUL_X, + [BPF_ALU64 | BPF_MUL | BPF_K] = &&ALU64_MUL_K, + [BPF_ALU64 | BPF_MOV | BPF_X] = &&ALU64_MOV_X, + [BPF_ALU64 | BPF_MOV | BPF_K] = &&ALU64_MOV_K, + [BPF_ALU64 | BPF_ARSH | BPF_X] = &&ALU64_ARSH_X, + [BPF_ALU64 | BPF_ARSH | BPF_K] = &&ALU64_ARSH_K, + [BPF_ALU64 | BPF_DIV | BPF_X] = &&ALU64_DIV_X, + [BPF_ALU64 | BPF_DIV | BPF_K] = &&ALU64_DIV_K, + [BPF_ALU64 | BPF_MOD | BPF_X] = &&ALU64_MOD_X, + [BPF_ALU64 | BPF_MOD | BPF_K] = &&ALU64_MOD_K, + [BPF_ALU64 | BPF_NEG] = &&ALU64_NEG, + /* Call instruction */ + [BPF_JMP | BPF_CALL] = &&JMP_CALL, + /* Jumps */ + [BPF_JMP | BPF_JA] = &&JMP_JA, + [BPF_JMP | BPF_JEQ | BPF_X] = &&JMP_JEQ_X, + [BPF_JMP | BPF_JEQ | BPF_K] = &&JMP_JEQ_K, + [BPF_JMP | BPF_JNE | BPF_X] = &&JMP_JNE_X, + [BPF_JMP | BPF_JNE | BPF_K] = &&JMP_JNE_K, + [BPF_JMP | BPF_JGT | BPF_X] = &&JMP_JGT_X, + [BPF_JMP | BPF_JGT | BPF_K] = &&JMP_JGT_K, + [BPF_JMP | BPF_JGE | BPF_X] = &&JMP_JGE_X, + [BPF_JMP | BPF_JGE | BPF_K] = &&JMP_JGE_K, + [BPF_JMP | BPF_JSGT | BPF_X] = &&JMP_JSGT_X, + [BPF_JMP | BPF_JSGT | BPF_K] = &&JMP_JSGT_K, + [BPF_JMP | BPF_JSGE | BPF_X] = &&JMP_JSGE_X, + [BPF_JMP | BPF_JSGE | BPF_K] = &&JMP_JSGE_K, + [BPF_JMP | BPF_JSET | BPF_X] = &&JMP_JSET_X, + [BPF_JMP | BPF_JSET | BPF_K] = &&JMP_JSET_K, + /* Program return */ + [BPF_JMP | BPF_EXIT] = &&JMP_EXIT, + /* Store instructions */ + [BPF_STX | BPF_MEM | BPF_B] = &&STX_MEM_B, + [BPF_STX | BPF_MEM | BPF_H] = &&STX_MEM_H, + [BPF_STX | BPF_MEM | BPF_W] = &&STX_MEM_W, + [BPF_STX | BPF_MEM | BPF_DW] = &&STX_MEM_DW, + [BPF_STX | BPF_XADD | BPF_W] = &&STX_XADD_W, + [BPF_STX | BPF_XADD | BPF_DW] = &&STX_XADD_DW, + [BPF_ST | BPF_MEM | BPF_B] = &&ST_MEM_B, + [BPF_ST | BPF_MEM | BPF_H] = &&ST_MEM_H, + [BPF_ST | BPF_MEM | BPF_W] = &&ST_MEM_W, + [BPF_ST | BPF_MEM | BPF_DW] = &&ST_MEM_DW, + /* Load instructions */ + [BPF_LDX | BPF_MEM | BPF_B] = &&LDX_MEM_B, + [BPF_LDX | BPF_MEM | BPF_H] = &&LDX_MEM_H, + [BPF_LDX | BPF_MEM | BPF_W] = &&LDX_MEM_W, + [BPF_LDX | BPF_MEM | BPF_DW] = &&LDX_MEM_DW, + [BPF_LD | BPF_ABS | BPF_W] = &&LD_ABS_W, + [BPF_LD | BPF_ABS | BPF_H] = &&LD_ABS_H, + [BPF_LD | BPF_ABS | BPF_B] = &&LD_ABS_B, + [BPF_LD | BPF_IND | BPF_W] = &&LD_IND_W, + [BPF_LD | BPF_IND | BPF_H] = &&LD_IND_H, + [BPF_LD | BPF_IND | BPF_B] = &&LD_IND_B, }; void *ptr; int off;
@@ -290,10 +295,10 @@ select_insn: ALU(XOR, ^) ALU(MUL, *) #undef ALU - ALU_NEG_0: + ALU_NEG: A = (u32) -A; CONT; - ALU64_NEG_0: + ALU64_NEG: A = -A; CONT; ALU_MOV_X:
@@ -382,7 +387,7 @@ select_insn: CONT; /* CALL */ - JMP_CALL_0: + JMP_CALL: /* Function call scratches BPF_R1-BPF_R5 registers, * preserves BPF_R6-BPF_R9, and stores return value * into BPF_R0.
@@ -392,7 +397,7 @@ select_insn: CONT; /* JMP */ - JMP_JA_0: + JMP_JA: insn += insn->off; CONT; JMP_JEQ_X:
@@ -479,7 +484,7 @@ select_insn: CONT_JMP; } CONT; - JMP_EXIT_0: + JMP_EXIT: return BPF_R0; /* STX and ST and LDX*/
--
1.7.11.7