From: Phil Sutter <phil@nwl.cc>
To: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: netfilter-devel@vger.kernel.org
Subject: [iptables PATCH v2 06/24] xtables-restore: Minimize caching when flushing
Date: Wed, 25 Sep 2019 23:25:47 +0200 [thread overview]
Message-ID: <20190925212605.1005-7-phil@nwl.cc> (raw)
In-Reply-To: <20190925212605.1005-1-phil@nwl.cc>
Unless --noflush was given, xtables-restore merely needs the list of
tables to decide whether to delete it or not. Introduce nft_fake_cache()
function which populates table list, initializes chain lists (so
nft_chain_list_get() returns an empty list instead of NULL) and sets
'have_cache' to turn any later calls to nft_build_cache() into nops.
If --noflush was given, call nft_build_cache() just once instead of for
each table line in input.
Signed-off-by: Phil Sutter <phil@nwl.cc>
---
iptables/nft.c | 17 +++++++++++++++++
iptables/nft.h | 1 +
iptables/xtables-restore.c | 7 +++++--
3 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/iptables/nft.c b/iptables/nft.c
index 695758831047a..02da53e60bc83 100644
--- a/iptables/nft.c
+++ b/iptables/nft.c
@@ -1611,6 +1611,23 @@ retry:
h->nft_genid = genid_start;
}
+void nft_fake_cache(struct nft_handle *h)
+{
+ int i;
+
+ fetch_table_cache(h);
+ for (i = 0; i < NFT_TABLE_MAX; i++) {
+ enum nft_table_type type = h->tables[i].type;
+
+ if (!h->tables[i].name)
+ continue;
+
+ h->cache->table[type].chains = nftnl_chain_list_alloc();
+ }
+ h->have_cache = true;
+ mnl_genid_get(h, &h->nft_genid);
+}
+
void nft_build_cache(struct nft_handle *h)
{
if (!h->have_cache)
diff --git a/iptables/nft.h b/iptables/nft.h
index 43463d7f262e8..bcac8e228c787 100644
--- a/iptables/nft.h
+++ b/iptables/nft.h
@@ -73,6 +73,7 @@ int mnl_talk(struct nft_handle *h, struct nlmsghdr *nlh,
void *data);
int nft_init(struct nft_handle *h, const struct builtin_table *t);
void nft_fini(struct nft_handle *h);
+void nft_fake_cache(struct nft_handle *h);
void nft_build_cache(struct nft_handle *h);
/*
diff --git a/iptables/xtables-restore.c b/iptables/xtables-restore.c
index 27e65b971727e..7f28a05c68619 100644
--- a/iptables/xtables-restore.c
+++ b/iptables/xtables-restore.c
@@ -96,6 +96,11 @@ void xtables_restore_parse(struct nft_handle *h,
line = 0;
+ if (!h->noflush)
+ nft_fake_cache(h);
+ else
+ nft_build_cache(h);
+
/* Grab standard input. */
while (fgets(buffer, sizeof(buffer), p->in)) {
int ret = 0;
@@ -145,8 +150,6 @@ void xtables_restore_parse(struct nft_handle *h,
if (p->tablename && (strcmp(p->tablename, table) != 0))
continue;
- nft_build_cache(h);
-
if (h->noflush == 0) {
DEBUGP("Cleaning all chains of table '%s'\n",
table);
--
2.23.0
next prev parent reply other threads:[~2019-09-25 21:28 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-25 21:25 [iptables PATCH v2 00/24] Improve iptables-nft performance with large rulesets Phil Sutter
2019-09-25 21:25 ` [iptables PATCH v2 01/24] xtables_error() does not return Phil Sutter
2019-09-25 21:31 ` Florian Westphal
2019-09-25 21:47 ` Phil Sutter
2019-09-25 21:25 ` [iptables PATCH v2 02/24] tests/shell: Speed up ipt-restore/0004-restore-race_0 Phil Sutter
2019-09-26 9:07 ` Florian Westphal
2019-09-25 21:25 ` [iptables PATCH v2 03/24] tests: shell: Support running for legacy/nft only Phil Sutter
2019-09-27 14:19 ` Florian Westphal
2019-09-30 16:20 ` Pablo Neira Ayuso
2019-09-25 21:25 ` [iptables PATCH v2 04/24] nft: Fix for add and delete of same rule in single batch Phil Sutter
2019-09-27 14:20 ` Florian Westphal
2019-09-30 16:36 ` Pablo Neira Ayuso
2019-09-25 21:25 ` [iptables PATCH v2 05/24] nft: Make nftnl_table_list_get() fetch only tables Phil Sutter
2019-09-27 14:25 ` Florian Westphal
2019-09-25 21:25 ` Phil Sutter [this message]
2019-09-27 14:27 ` [iptables PATCH v2 06/24] xtables-restore: Minimize caching when flushing Florian Westphal
2019-09-25 21:25 ` [iptables PATCH v2 07/24] nft: Support fetch_rule_cache() per chain Phil Sutter
2019-09-25 21:25 ` [iptables PATCH v2 08/24] nft: Fetch only chains in nft_chain_list_get() Phil Sutter
2019-09-30 16:57 ` Pablo Neira Ayuso
2019-09-30 17:12 ` Pablo Neira Ayuso
2019-09-25 21:25 ` [iptables PATCH v2 09/24] nft: Support fetch_chain_cache() per table Phil Sutter
2019-09-25 21:25 ` [iptables PATCH v2 10/24] nft: Support fetch_chain_cache() per chain Phil Sutter
2019-09-25 21:25 ` [iptables PATCH v2 11/24] nft: Support nft_chain_list_get() " Phil Sutter
2019-09-25 21:25 ` [iptables PATCH v2 12/24] nft: Reduce cache overhead of adding a custom chain Phil Sutter
2019-09-25 21:25 ` [iptables PATCH v2 13/24] nft: Reduce cache overhead of nft_chain_builtin_init() Phil Sutter
2019-09-25 21:25 ` [iptables PATCH v2 14/24] nft: Support nft_is_table_compatible() per chain Phil Sutter
2019-09-25 21:25 ` [iptables PATCH v2 15/24] nft: Optimize flushing all chains of a table Phil Sutter
2019-09-25 21:25 ` [iptables PATCH v2 16/24] xtables-restore: Introduce rule counter tokenizer function Phil Sutter
2019-09-25 21:25 ` [iptables PATCH v2 17/24] xtables-restore: Carry in_table in struct nft_xt_restore_parse Phil Sutter
2019-09-30 16:30 ` Pablo Neira Ayuso
2019-09-30 16:31 ` Pablo Neira Ayuso
2019-09-25 21:25 ` [iptables PATCH v2 18/24] xtables-restore: Use xt_params->program_name Phil Sutter
2019-09-25 21:26 ` [iptables PATCH v2 19/24] xtables-restore: Carry curtable in struct nft_xt_restore_parse Phil Sutter
2019-09-25 21:26 ` [iptables PATCH v2 20/24] xtables-restore: Introduce line parsing function Phil Sutter
2019-09-25 21:26 ` [iptables PATCH v2 21/24] tests: shell: Add ipt-restore/0007-flush-noflush_0 Phil Sutter
2019-09-25 21:26 ` [iptables PATCH v2 22/24] xtables-restore: Remove some pointless linebreaks Phil Sutter
2019-09-25 21:26 ` [iptables PATCH v2 23/24] xtables-restore: Allow lines without trailing newline character Phil Sutter
2019-09-25 21:26 ` [iptables PATCH v2 24/24] xtables-restore: Improve performance of --noflush operation Phil Sutter
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