From: Jan Engelhardt <jengelh@xxxxxxxxxx>
Signed-off-by: Jan Engelhardt <jengelh@xxxxxxxxxx>
---
include/linux/netfilter/x_tables.h | 2 ++
net/bridge/netfilter/ebtables.c | 5 +----
net/ipv4/netfilter/ip_tables.c | 18 ++++++++----------
net/ipv6/netfilter/ip6_tables.c | 18 ++++++++----------
net/netfilter/x_tables.c | 11 +++++++++++
5 files changed, 30 insertions(+), 24 deletions(-)
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h
index f8f5551..dd9d15a 100644
--- a/include/linux/netfilter/x_tables.h
+++ b/include/linux/netfilter/x_tables.h
@@ -436,6 +436,8 @@ extern struct xt_table_info *xt_replace_table(struct xt_table *table,
extern struct xt_match *xt_find_match(u8 af, const char *name, u8 revision);
extern struct xt_target *xt_find_target(u8 af, const char *name, u8 revision);
+extern struct xt_match *xt_request_find_match(u8 af, const char *name,
+ u8 revision);
extern struct xt_target *xt_request_find_target(u8 af, const char *name,
u8 revision);
extern int xt_find_revision(u8 af, const char *name, u8 revision,
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 6d3b256..c41f3fa 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -361,12 +361,9 @@ ebt_check_match(struct ebt_entry_match *m, struct xt_mtchk_param *par,
left - sizeof(struct ebt_entry_match) < m->match_size)
return -EINVAL;
- match = try_then_request_module(xt_find_match(NFPROTO_BRIDGE,
- m->u.name, 0), "ebt_%s", m->u.name);
+ match = xt_request_find_match(NFPROTO_BRIDGE, m->u.name, 0);
if (IS_ERR(match))
return PTR_ERR(match);
- if (match == NULL)
- return -ENOENT;
m->u.match = match;
par->match = match;
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index e24ec48..09f6567 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -629,12 +629,11 @@ find_check_match(struct ipt_entry_match *m, struct xt_mtchk_param *par)
struct xt_match *match;
int ret;
- match = try_then_request_module(xt_find_match(AF_INET, m->u.user.name,
- m->u.user.revision),
- "ipt_%s", m->u.user.name);
- if (IS_ERR(match) || !match) {
+ match = xt_request_find_match(NFPROTO_IPV4, m->u.user.name,
+ m->u.user.revision);
+ if (IS_ERR(match)) {
duprintf("find_check_match: `%s' not found\n", m->u.user.name);
- return match ? PTR_ERR(match) : -ENOENT;
+ return PTR_ERR(match);
}
m->u.kernel.match = match;
@@ -1472,13 +1471,12 @@ compat_find_calc_match(struct ipt_entry_match *m,
{
struct xt_match *match;
- match = try_then_request_module(xt_find_match(AF_INET, m->u.user.name,
- m->u.user.revision),
- "ipt_%s", m->u.user.name);
- if (IS_ERR(match) || !match) {
+ match = xt_request_find_match(NFPROTO_IPV4, m->u.user.name,
+ m->u.user.revision);
+ if (IS_ERR(match)) {
duprintf("compat_check_calc_match: `%s' not found\n",
m->u.user.name);
- return match ? PTR_ERR(match) : -ENOENT;
+ return PTR_ERR(match);
}
m->u.kernel.match = match;
*size += xt_compat_match_offset(match);
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 842bef3..41e2429 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -660,12 +660,11 @@ find_check_match(struct ip6t_entry_match *m, struct xt_mtchk_param *par)
struct xt_match *match;
int ret;
- match = try_then_request_module(xt_find_match(AF_INET6, m->u.user.name,
- m->u.user.revision),
- "ip6t_%s", m->u.user.name);
- if (IS_ERR(match) || !match) {
+ match = xt_request_find_match(NFPROTO_IPV6, m->u.user.name,
+ m->u.user.revision);
+ if (IS_ERR(match)) {
duprintf("find_check_match: `%s' not found\n", m->u.user.name);
- return match ? PTR_ERR(match) : -ENOENT;
+ return PTR_ERR(match);
}
m->u.kernel.match = match;
@@ -1506,13 +1505,12 @@ compat_find_calc_match(struct ip6t_entry_match *m,
{
struct xt_match *match;
- match = try_then_request_module(xt_find_match(AF_INET6, m->u.user.name,
- m->u.user.revision),
- "ip6t_%s", m->u.user.name);
- if (IS_ERR(match) || !match) {
+ match = xt_request_find_match(NFPROTO_IPV6, m->u.user.name,
+ m->u.user.revision);
+ if (IS_ERR(match)) {
duprintf("compat_check_calc_match: `%s' not found\n",
m->u.user.name);
- return match ? PTR_ERR(match) : -ENOENT;
+ return PTR_ERR(match);
}
m->u.kernel.match = match;
*size += xt_compat_match_offset(match);
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
index bf2806a..ee7fe21 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -214,6 +214,17 @@ struct xt_match *xt_find_match(u8 af, const char *name, u8 revision)
}
EXPORT_SYMBOL(xt_find_match);
+struct xt_match *
+xt_request_find_match(uint8_t nfproto, const char *name, uint8_t revision)
+{
+ struct xt_match *match;
+
+ match = try_then_request_module(xt_find_match(nfproto, name, revision),
+ "%st_%s", xt_prefix[nfproto], name);
+ return (match != NULL) ? match : ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL_GPL(xt_request_find_match);
+
/* Find target, grabs ref. Returns ERR_PTR() on error. */
struct xt_target *xt_find_target(u8 af, const char *name, u8 revision)
{
--
1.7.0.4
--
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