120 lines
3.4 KiB
Diff
120 lines
3.4 KiB
Diff
From 1a3d13b637e71f1f207eda17f816c58a9425971e Mon Sep 17 00:00:00 2001
|
|
From: Phil Sutter <phil@nwl.cc>
|
|
Date: Tue, 1 Mar 2022 19:46:21 +0100
|
|
Subject: [PATCH] nft: Speed up immediate parsing
|
|
|
|
Parsing of rules which jump to a chain pointlessly causes a call to
|
|
xtables_find_target() despite the code already knowing the outcome.
|
|
|
|
Avoid the significant delay for rulesets with many chain jumps by
|
|
performing the (standard) target lookup only for accept/drop/return
|
|
verdicts.
|
|
|
|
From a biased test-case on my VM:
|
|
|
|
| # iptables-nft-save | grep -c -- '-j'
|
|
| 133943
|
|
| # time ./old/iptables-nft-save >/dev/null
|
|
| real 0m45.566s
|
|
| user 0m1.308s
|
|
| sys 0m8.430s
|
|
| # time ./new/iptables-nft-save >/dev/null
|
|
| real 0m3.547s
|
|
| user 0m0.762s
|
|
| sys 0m2.476s
|
|
|
|
Signed-off-by: Phil Sutter <phil@nwl.cc>
|
|
Acked-by: Florian Westphal <fw@strlen.de>
|
|
(cherry picked from commit 07ee529f5a62838d68be59683be99bf6a7cda0f2)
|
|
---
|
|
iptables/nft-bridge.c | 1 +
|
|
iptables/nft-shared.c | 37 ++++++++++++++++++-------------------
|
|
2 files changed, 19 insertions(+), 19 deletions(-)
|
|
|
|
diff --git a/iptables/nft-bridge.c b/iptables/nft-bridge.c
|
|
index 94febc9890674..9cc6f87b28fe0 100644
|
|
--- a/iptables/nft-bridge.c
|
|
+++ b/iptables/nft-bridge.c
|
|
@@ -539,6 +539,7 @@ static void nft_bridge_parse_target(struct xtables_target *t, void *data)
|
|
}
|
|
|
|
cs->target = t;
|
|
+ cs->jumpto = t->name;
|
|
}
|
|
|
|
static void nft_rule_to_ebtables_command_state(struct nft_handle *h,
|
|
diff --git a/iptables/nft-shared.c b/iptables/nft-shared.c
|
|
index 894407f7d9b57..6c643a8c06aaa 100644
|
|
--- a/iptables/nft-shared.c
|
|
+++ b/iptables/nft-shared.c
|
|
@@ -496,6 +496,8 @@ static void nft_parse_immediate(struct nft_xt_ctx *ctx, struct nftnl_expr *e)
|
|
{
|
|
const char *chain = nftnl_expr_get_str(e, NFTNL_EXPR_IMM_CHAIN);
|
|
struct iptables_command_state *cs = ctx->cs;
|
|
+ struct xt_entry_target *t;
|
|
+ uint32_t size;
|
|
int verdict;
|
|
|
|
if (nftnl_expr_is_set(e, NFTNL_EXPR_IMM_DATA)) {
|
|
@@ -532,8 +534,21 @@ static void nft_parse_immediate(struct nft_xt_ctx *ctx, struct nftnl_expr *e)
|
|
/* fall through */
|
|
case NFT_JUMP:
|
|
cs->jumpto = chain;
|
|
- break;
|
|
+ /* fall through */
|
|
+ default:
|
|
+ return;
|
|
}
|
|
+
|
|
+ cs->target = xtables_find_target(cs->jumpto, XTF_TRY_LOAD);
|
|
+ if (!cs->target)
|
|
+ return;
|
|
+
|
|
+ size = XT_ALIGN(sizeof(struct xt_entry_target)) + cs->target->size;
|
|
+ t = xtables_calloc(1, size);
|
|
+ t->u.target_size = size;
|
|
+ t->u.user.revision = cs->target->revision;
|
|
+ strcpy(t->u.user.name, cs->jumpto);
|
|
+ cs->target->t = t;
|
|
}
|
|
|
|
static void nft_parse_limit(struct nft_xt_ctx *ctx, struct nftnl_expr *e)
|
|
@@ -661,25 +676,8 @@ void nft_rule_to_iptables_command_state(struct nft_handle *h,
|
|
}
|
|
}
|
|
|
|
- if (cs->target != NULL) {
|
|
- cs->jumpto = cs->target->name;
|
|
- } else if (cs->jumpto != NULL) {
|
|
- struct xt_entry_target *t;
|
|
- uint32_t size;
|
|
-
|
|
- cs->target = xtables_find_target(cs->jumpto, XTF_TRY_LOAD);
|
|
- if (!cs->target)
|
|
- return;
|
|
-
|
|
- size = XT_ALIGN(sizeof(struct xt_entry_target)) + cs->target->size;
|
|
- t = xtables_calloc(1, size);
|
|
- t->u.target_size = size;
|
|
- t->u.user.revision = cs->target->revision;
|
|
- strcpy(t->u.user.name, cs->jumpto);
|
|
- cs->target->t = t;
|
|
- } else {
|
|
+ if (!cs->jumpto)
|
|
cs->jumpto = "";
|
|
- }
|
|
}
|
|
|
|
void nft_clear_iptables_command_state(struct iptables_command_state *cs)
|
|
@@ -968,6 +966,7 @@ void nft_ipv46_parse_target(struct xtables_target *t, void *data)
|
|
struct iptables_command_state *cs = data;
|
|
|
|
cs->target = t;
|
|
+ cs->jumpto = t->name;
|
|
}
|
|
|
|
void nft_check_xt_legacy(int family, bool is_ipt_save)
|
|
--
|
|
2.40.0
|
|
|