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netfilter: conntrack: remove l4proto destroy hook

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Only one user (gre), add a direct call and remove this facility.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2019-01-15 22:03:46 +01:00 committed by Pablo Neira Ayuso
parent 2a389de86e
commit e56894356f
3 changed files with 11 additions and 21 deletions
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3
include/net/netfilter/nf_conntrack_l4proto.h
View File

@ -27,9 +27,6 @@ struct nf_conntrack_l4proto {
/* protoinfo nlattr size, closes a hole */
u16 nlattr_size;
/* Called when a conntrack entry is destroyed */
void (*destroy)(struct nf_conn *ct);
/* called by gc worker if table is full */
bool (*can_early_drop)(const struct nf_conn *ct);

15
net/netfilter/nf_conntrack_core.c
View File

@ -524,11 +524,18 @@ void nf_ct_tmpl_free(struct nf_conn *tmpl)
}
EXPORT_SYMBOL_GPL(nf_ct_tmpl_free);
static void destroy_gre_conntrack(struct nf_conn *ct)
{
struct nf_conn *master = ct->master;
if (master)
nf_ct_gre_keymap_destroy(master);
}
static void
destroy_conntrack(struct nf_conntrack *nfct)
{
struct nf_conn *ct = (struct nf_conn *)nfct;
const struct nf_conntrack_l4proto *l4proto;
pr_debug("destroy_conntrack(%p)\n", ct);
WARN_ON(atomic_read(&nfct->use) != 0);
@ -537,9 +544,9 @@ destroy_conntrack(struct nf_conntrack *nfct)
nf_ct_tmpl_free(ct);
return;
}
l4proto = __nf_ct_l4proto_find(nf_ct_protonum(ct));
if (l4proto->destroy)
l4proto->destroy(ct);
if (unlikely(nf_ct_protonum(ct) == IPPROTO_GRE))
destroy_gre_conntrack(ct);
local_bh_disable();
/* Expectations will have been removed in clean_from_lists,

14
net/netfilter/nf_conntrack_proto_gre.c
View File

@ -249,19 +249,6 @@ int nf_conntrack_gre_packet(struct nf_conn *ct,
return NF_ACCEPT;
}
/* Called when a conntrack entry has already been removed from the hashes
* and is about to be deleted from memory */
static void gre_destroy(struct nf_conn *ct)
{
struct nf_conn *master = ct->master;
pr_debug(" entering\n");
if (!master)
pr_debug("no master !?!\n");
else
nf_ct_gre_keymap_destroy(master);
}
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
#include <linux/netfilter/nfnetlink.h>
@ -329,7 +316,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre = {
#ifdef CONFIG_NF_CONNTRACK_PROCFS
.print_conntrack = gre_print_conntrack,
#endif
.destroy = gre_destroy,
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,