* [PATCH nf-next v2 0/3] netfilter: conntrack sparse annotations
@ 2022-06-22 9:00 Florian Westphal
2022-06-22 9:00 ` [PATCH nf-next v2 1/3] netfilter: nf_conntrack: add missing __rcu annotations Florian Westphal
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: Florian Westphal @ 2022-06-22 9:00 UTC (permalink / raw)
To: netfilter-devel; +Cc: Florian Westphal
This series reduces the number of generated sparse warnings
in the netfilter codebase.
In some cases its just due to a missing '__rcu' annotation
of the base pointer, but in some other cases there is a
direct access to a __rcu annotated base pointer.
v2: keep unrelated EXPORT_SYMBOL in patch 3.
Florian Westphal (3):
netfilter: nf_conntrack: add missing __rcu annotations
netfilter: nf_conntrack: use rcu accessors where needed
netfilter: h323: merge nat hook pointers into one
include/linux/netfilter/nf_conntrack_h323.h | 109 ++++----
include/linux/netfilter/nf_conntrack_sip.h | 2 +-
include/net/netfilter/nf_conntrack_timeout.h | 2 +-
net/ipv4/netfilter/nf_nat_h323.c | 42 +--
net/netfilter/nf_conntrack_broadcast.c | 6 +-
net/netfilter/nf_conntrack_h323_main.c | 259 +++++++------------
net/netfilter/nf_conntrack_helper.c | 2 +-
net/netfilter/nf_conntrack_netlink.c | 9 +-
net/netfilter/nf_conntrack_pptp.c | 2 +-
net/netfilter/nf_conntrack_sip.c | 9 +-
net/netfilter/nf_conntrack_timeout.c | 18 +-
net/netfilter/nfnetlink_cthelper.c | 10 +-
net/netfilter/xt_CT.c | 23 +-
13 files changed, 230 insertions(+), 263 deletions(-)
--
2.35.1
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH nf-next v2 1/3] netfilter: nf_conntrack: add missing __rcu annotations
2022-06-22 9:00 [PATCH nf-next v2 0/3] netfilter: conntrack sparse annotations Florian Westphal
@ 2022-06-22 9:00 ` Florian Westphal
2022-06-22 9:00 ` [PATCH nf-next v2 2/3] netfilter: nf_conntrack: use rcu accessors where needed Florian Westphal
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Florian Westphal @ 2022-06-22 9:00 UTC (permalink / raw)
To: netfilter-devel; +Cc: Florian Westphal
Access to the hook pointers use correct helpers but the pointers lack
the needed __rcu annotation.
Signed-off-by: Florian Westphal <fw@strlen.de>
---
no changes.
include/linux/netfilter/nf_conntrack_sip.h | 2 +-
include/net/netfilter/nf_conntrack_timeout.h | 2 +-
net/netfilter/nf_conntrack_pptp.c | 2 +-
net/netfilter/nf_conntrack_sip.c | 2 +-
net/netfilter/nf_conntrack_timeout.c | 2 +-
5 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/include/linux/netfilter/nf_conntrack_sip.h b/include/linux/netfilter/nf_conntrack_sip.h
index c620521c42bc..dbc614dfe0d5 100644
--- a/include/linux/netfilter/nf_conntrack_sip.h
+++ b/include/linux/netfilter/nf_conntrack_sip.h
@@ -164,7 +164,7 @@ struct nf_nat_sip_hooks {
unsigned int medialen,
union nf_inet_addr *rtp_addr);
};
-extern const struct nf_nat_sip_hooks *nf_nat_sip_hooks;
+extern const struct nf_nat_sip_hooks __rcu *nf_nat_sip_hooks;
int ct_sip_parse_request(const struct nf_conn *ct, const char *dptr,
unsigned int datalen, unsigned int *matchoff,
diff --git a/include/net/netfilter/nf_conntrack_timeout.h b/include/net/netfilter/nf_conntrack_timeout.h
index fea258983d23..9fdaba911de6 100644
--- a/include/net/netfilter/nf_conntrack_timeout.h
+++ b/include/net/netfilter/nf_conntrack_timeout.h
@@ -105,7 +105,7 @@ struct nf_ct_timeout_hooks {
void (*timeout_put)(struct nf_ct_timeout *timeout);
};
-extern const struct nf_ct_timeout_hooks *nf_ct_timeout_hook;
+extern const struct nf_ct_timeout_hooks __rcu *nf_ct_timeout_hook;
#endif
#endif /* _NF_CONNTRACK_TIMEOUT_H */
diff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c
index f3fa367b455f..4c679638df06 100644
--- a/net/netfilter/nf_conntrack_pptp.c
+++ b/net/netfilter/nf_conntrack_pptp.c
@@ -45,7 +45,7 @@ MODULE_ALIAS_NFCT_HELPER("pptp");
static DEFINE_SPINLOCK(nf_pptp_lock);
-const struct nf_nat_pptp_hook *nf_nat_pptp_hook;
+const struct nf_nat_pptp_hook __rcu *nf_nat_pptp_hook;
EXPORT_SYMBOL_GPL(nf_nat_pptp_hook);
#if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index b83dc9bf0a5d..a88b43624b27 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -60,7 +60,7 @@ module_param(sip_external_media, int, 0600);
MODULE_PARM_DESC(sip_external_media, "Expect Media streams between external "
"endpoints (default 0)");
-const struct nf_nat_sip_hooks *nf_nat_sip_hooks;
+const struct nf_nat_sip_hooks __rcu *nf_nat_sip_hooks;
EXPORT_SYMBOL_GPL(nf_nat_sip_hooks);
static int string_len(const struct nf_conn *ct, const char *dptr,
diff --git a/net/netfilter/nf_conntrack_timeout.c b/net/netfilter/nf_conntrack_timeout.c
index 0f828d05ea60..821365ed5b2c 100644
--- a/net/netfilter/nf_conntrack_timeout.c
+++ b/net/netfilter/nf_conntrack_timeout.c
@@ -22,7 +22,7 @@
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_timeout.h>
-const struct nf_ct_timeout_hooks *nf_ct_timeout_hook __read_mostly;
+const struct nf_ct_timeout_hooks __rcu *nf_ct_timeout_hook __read_mostly;
EXPORT_SYMBOL_GPL(nf_ct_timeout_hook);
static int untimeout(struct nf_conn *ct, void *timeout)
--
2.35.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH nf-next v2 2/3] netfilter: nf_conntrack: use rcu accessors where needed
2022-06-22 9:00 [PATCH nf-next v2 0/3] netfilter: conntrack sparse annotations Florian Westphal
2022-06-22 9:00 ` [PATCH nf-next v2 1/3] netfilter: nf_conntrack: add missing __rcu annotations Florian Westphal
@ 2022-06-22 9:00 ` Florian Westphal
2022-06-22 9:00 ` [PATCH nf-next v2 3/3] netfilter: h323: merge nat hook pointers into one Florian Westphal
2022-07-11 14:38 ` [PATCH nf-next v2 0/3] netfilter: conntrack sparse annotations Pablo Neira Ayuso
3 siblings, 0 replies; 5+ messages in thread
From: Florian Westphal @ 2022-06-22 9:00 UTC (permalink / raw)
To: netfilter-devel; +Cc: Florian Westphal
Sparse complains about direct access to the 'helper' and timeout members.
Both have __rcu annotation, so use the accessors.
xt_CT is fine, accesses occur before the structure is visible to other
cpus. Switch to rcu accessors there as well to reduce noise.
Signed-off-by: Florian Westphal <fw@strlen.de>
---
no changes.
net/netfilter/nf_conntrack_broadcast.c | 6 +++++-
net/netfilter/nf_conntrack_helper.c | 2 +-
net/netfilter/nf_conntrack_netlink.c | 9 +++++++--
net/netfilter/nf_conntrack_sip.c | 7 ++++++-
net/netfilter/nf_conntrack_timeout.c | 16 +++++++++++++---
net/netfilter/nfnetlink_cthelper.c | 10 +++++++---
net/netfilter/xt_CT.c | 23 ++++++++++++++++++-----
7 files changed, 57 insertions(+), 16 deletions(-)
diff --git a/net/netfilter/nf_conntrack_broadcast.c b/net/netfilter/nf_conntrack_broadcast.c
index 1ba6becc3079..9fb9b8031298 100644
--- a/net/netfilter/nf_conntrack_broadcast.c
+++ b/net/netfilter/nf_conntrack_broadcast.c
@@ -20,6 +20,7 @@ int nf_conntrack_broadcast_help(struct sk_buff *skb,
enum ip_conntrack_info ctinfo,
unsigned int timeout)
{
+ const struct nf_conntrack_helper *helper;
struct nf_conntrack_expect *exp;
struct iphdr *iph = ip_hdr(skb);
struct rtable *rt = skb_rtable(skb);
@@ -58,7 +59,10 @@ int nf_conntrack_broadcast_help(struct sk_buff *skb,
goto out;
exp->tuple = ct->tuplehash[IP_CT_DIR_REPLY].tuple;
- exp->tuple.src.u.udp.port = help->helper->tuple.src.u.udp.port;
+
+ helper = rcu_dereference(help->helper);
+ if (helper)
+ exp->tuple.src.u.udp.port = helper->tuple.src.u.udp.port;
exp->mask.src.u3.ip = mask;
exp->mask.src.u.udp.port = htons(0xFFFF);
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index c12a87ebc3ee..9431fb026be9 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -249,7 +249,7 @@ int __nf_ct_try_assign_helper(struct nf_conn *ct, struct nf_conn *tmpl,
if (tmpl != NULL) {
help = nfct_help(tmpl);
if (help != NULL) {
- helper = help->helper;
+ helper = rcu_dereference(help->helper);
set_bit(IPS_HELPER_BIT, &ct->status);
}
}
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 722af5e309ba..25c2c0de78f0 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -2004,7 +2004,7 @@ static int ctnetlink_change_helper(struct nf_conn *ct,
}
if (help) {
- if (help->helper == helper) {
+ if (rcu_access_pointer(help->helper) == helper) {
/* update private helper data if allowed. */
if (helper->from_nlattr)
helper->from_nlattr(helpinfo, ct);
@@ -3412,12 +3412,17 @@ static int ctnetlink_get_expect(struct sk_buff *skb,
static bool expect_iter_name(struct nf_conntrack_expect *exp, void *data)
{
+ struct nf_conntrack_helper *helper;
const struct nf_conn_help *m_help;
const char *name = data;
m_help = nfct_help(exp->master);
- return strcmp(m_help->helper->name, name) == 0;
+ helper = rcu_dereference(m_help->helper);
+ if (!helper)
+ return false;
+
+ return strcmp(helper->name, name) == 0;
}
static bool expect_iter_all(struct nf_conntrack_expect *exp, void *data)
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index a88b43624b27..daf06f71d31c 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -1229,6 +1229,7 @@ static int process_register_request(struct sk_buff *skb, unsigned int protoff,
struct nf_conntrack_expect *exp;
union nf_inet_addr *saddr, daddr;
const struct nf_nat_sip_hooks *hooks;
+ struct nf_conntrack_helper *helper;
__be16 port;
u8 proto;
unsigned int expires = 0;
@@ -1289,10 +1290,14 @@ static int process_register_request(struct sk_buff *skb, unsigned int protoff,
if (sip_direct_signalling)
saddr = &ct->tuplehash[!dir].tuple.src.u3;
+ helper = rcu_dereference(nfct_help(ct)->helper);
+ if (!helper)
+ return NF_DROP;
+
nf_ct_expect_init(exp, SIP_EXPECT_SIGNALLING, nf_ct_l3num(ct),
saddr, &daddr, proto, NULL, &port);
exp->timeout.expires = sip_timeout * HZ;
- exp->helper = nfct_help(ct)->helper;
+ exp->helper = helper;
exp->flags = NF_CT_EXPECT_PERMANENT | NF_CT_EXPECT_INACTIVE;
hooks = rcu_dereference(nf_nat_sip_hooks);
diff --git a/net/netfilter/nf_conntrack_timeout.c b/net/netfilter/nf_conntrack_timeout.c
index 821365ed5b2c..0cc584d3dbb1 100644
--- a/net/netfilter/nf_conntrack_timeout.c
+++ b/net/netfilter/nf_conntrack_timeout.c
@@ -29,8 +29,14 @@ static int untimeout(struct nf_conn *ct, void *timeout)
{
struct nf_conn_timeout *timeout_ext = nf_ct_timeout_find(ct);
- if (timeout_ext && (!timeout || timeout_ext->timeout == timeout))
- RCU_INIT_POINTER(timeout_ext->timeout, NULL);
+ if (timeout_ext) {
+ const struct nf_ct_timeout *t;
+
+ t = rcu_access_pointer(timeout_ext->timeout);
+
+ if (!timeout || t == timeout)
+ RCU_INIT_POINTER(timeout_ext->timeout, NULL);
+ }
/* We are not intended to delete this conntrack. */
return 0;
@@ -127,7 +133,11 @@ void nf_ct_destroy_timeout(struct nf_conn *ct)
if (h) {
timeout_ext = nf_ct_timeout_find(ct);
if (timeout_ext) {
- h->timeout_put(timeout_ext->timeout);
+ struct nf_ct_timeout *t;
+
+ t = rcu_dereference(timeout_ext->timeout);
+ if (t)
+ h->timeout_put(t);
RCU_INIT_POINTER(timeout_ext->timeout, NULL);
}
}
diff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c
index 5c622f55c9d6..97248963a7d3 100644
--- a/net/netfilter/nfnetlink_cthelper.c
+++ b/net/netfilter/nfnetlink_cthelper.c
@@ -96,11 +96,13 @@ static int
nfnl_cthelper_from_nlattr(struct nlattr *attr, struct nf_conn *ct)
{
struct nf_conn_help *help = nfct_help(ct);
+ const struct nf_conntrack_helper *helper;
if (attr == NULL)
return -EINVAL;
- if (help->helper->data_len == 0)
+ helper = rcu_dereference(help->helper);
+ if (!helper || helper->data_len == 0)
return -EINVAL;
nla_memcpy(help->data, attr, sizeof(help->data));
@@ -111,9 +113,11 @@ static int
nfnl_cthelper_to_nlattr(struct sk_buff *skb, const struct nf_conn *ct)
{
const struct nf_conn_help *help = nfct_help(ct);
+ const struct nf_conntrack_helper *helper;
- if (help->helper->data_len &&
- nla_put(skb, CTA_HELP_INFO, help->helper->data_len, &help->data))
+ helper = rcu_dereference(help->helper);
+ if (helper && helper->data_len &&
+ nla_put(skb, CTA_HELP_INFO, helper->data_len, &help->data))
goto nla_put_failure;
return 0;
diff --git a/net/netfilter/xt_CT.c b/net/netfilter/xt_CT.c
index 267757b0392a..2be2f7a7b60f 100644
--- a/net/netfilter/xt_CT.c
+++ b/net/netfilter/xt_CT.c
@@ -96,7 +96,7 @@ xt_ct_set_helper(struct nf_conn *ct, const char *helper_name,
return -ENOMEM;
}
- help->helper = helper;
+ rcu_assign_pointer(help->helper, helper);
return 0;
}
@@ -136,6 +136,21 @@ static u16 xt_ct_flags_to_dir(const struct xt_ct_target_info_v1 *info)
}
}
+static void xt_ct_put_helper(struct nf_conn_help *help)
+{
+ struct nf_conntrack_helper *helper;
+
+ if (!help)
+ return;
+
+ /* not yet exposed to other cpus, or ruleset
+ * already detached (post-replacement).
+ */
+ helper = rcu_dereference_raw(help->helper);
+ if (helper)
+ nf_conntrack_helper_put(helper);
+}
+
static int xt_ct_tg_check(const struct xt_tgchk_param *par,
struct xt_ct_target_info_v1 *info)
{
@@ -207,8 +222,7 @@ static int xt_ct_tg_check(const struct xt_tgchk_param *par,
err4:
help = nfct_help(ct);
- if (help)
- nf_conntrack_helper_put(help->helper);
+ xt_ct_put_helper(help);
err3:
nf_ct_tmpl_free(ct);
err2:
@@ -270,8 +284,7 @@ static void xt_ct_tg_destroy(const struct xt_tgdtor_param *par,
if (ct) {
help = nfct_help(ct);
- if (help)
- nf_conntrack_helper_put(help->helper);
+ xt_ct_put_helper(help);
nf_ct_netns_put(par->net, par->family);
--
2.35.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH nf-next v2 3/3] netfilter: h323: merge nat hook pointers into one
2022-06-22 9:00 [PATCH nf-next v2 0/3] netfilter: conntrack sparse annotations Florian Westphal
2022-06-22 9:00 ` [PATCH nf-next v2 1/3] netfilter: nf_conntrack: add missing __rcu annotations Florian Westphal
2022-06-22 9:00 ` [PATCH nf-next v2 2/3] netfilter: nf_conntrack: use rcu accessors where needed Florian Westphal
@ 2022-06-22 9:00 ` Florian Westphal
2022-07-11 14:38 ` [PATCH nf-next v2 0/3] netfilter: conntrack sparse annotations Pablo Neira Ayuso
3 siblings, 0 replies; 5+ messages in thread
From: Florian Westphal @ 2022-06-22 9:00 UTC (permalink / raw)
To: netfilter-devel; +Cc: Florian Westphal
sparse complains about incorrect rcu usage.
Code uses the correct rcu access primitives, but the function pointers
lack rcu annotations.
Collapse all of them into a single structure, then annotate the pointer.
Signed-off-by: Florian Westphal <fw@strlen.de>
---
keep EXPORT_SYMBOL_GPL(get_h225_addr), its not part of nfct_h323_nat_hooks,
else link failure if conntrack_h323 is a module.
include/linux/netfilter/nf_conntrack_h323.h | 109 ++++----
net/ipv4/netfilter/nf_nat_h323.c | 42 ++--
net/netfilter/nf_conntrack_h323_main.c | 260 ++++++++------------
3 files changed, 169 insertions(+), 242 deletions(-)
diff --git a/include/linux/netfilter/nf_conntrack_h323.h b/include/linux/netfilter/nf_conntrack_h323.h
index 4561ec0fcea4..9e937f64a1ad 100644
--- a/include/linux/netfilter/nf_conntrack_h323.h
+++ b/include/linux/netfilter/nf_conntrack_h323.h
@@ -38,60 +38,63 @@ void nf_conntrack_h245_expect(struct nf_conn *new,
struct nf_conntrack_expect *this);
void nf_conntrack_q931_expect(struct nf_conn *new,
struct nf_conntrack_expect *this);
-extern int (*set_h245_addr_hook) (struct sk_buff *skb, unsigned int protoff,
- unsigned char **data, int dataoff,
- H245_TransportAddress *taddr,
- union nf_inet_addr *addr,
- __be16 port);
-extern int (*set_h225_addr_hook) (struct sk_buff *skb, unsigned int protoff,
- unsigned char **data, int dataoff,
- TransportAddress *taddr,
- union nf_inet_addr *addr,
- __be16 port);
-extern int (*set_sig_addr_hook) (struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff, unsigned char **data,
- TransportAddress *taddr, int count);
-extern int (*set_ras_addr_hook) (struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff, unsigned char **data,
- TransportAddress *taddr, int count);
-extern int (*nat_rtp_rtcp_hook) (struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff, unsigned char **data,
- int dataoff,
- H245_TransportAddress *taddr,
- __be16 port, __be16 rtp_port,
- struct nf_conntrack_expect *rtp_exp,
- struct nf_conntrack_expect *rtcp_exp);
-extern int (*nat_t120_hook) (struct sk_buff *skb, struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff,
+
+struct nfct_h323_nat_hooks {
+ int (*set_h245_addr)(struct sk_buff *skb, unsigned int protoff,
unsigned char **data, int dataoff,
- H245_TransportAddress *taddr, __be16 port,
- struct nf_conntrack_expect *exp);
-extern int (*nat_h245_hook) (struct sk_buff *skb, struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff,
+ H245_TransportAddress *taddr,
+ union nf_inet_addr *addr, __be16 port);
+ int (*set_h225_addr)(struct sk_buff *skb, unsigned int protoff,
unsigned char **data, int dataoff,
- TransportAddress *taddr, __be16 port,
- struct nf_conntrack_expect *exp);
-extern int (*nat_callforwarding_hook) (struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff,
- unsigned char **data, int dataoff,
- TransportAddress *taddr,
- __be16 port,
- struct nf_conntrack_expect *exp);
-extern int (*nat_q931_hook) (struct sk_buff *skb, struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff,
- unsigned char **data, TransportAddress *taddr,
- int idx, __be16 port,
- struct nf_conntrack_expect *exp);
+ TransportAddress *taddr,
+ union nf_inet_addr *addr, __be16 port);
+ int (*set_sig_addr)(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff, unsigned char **data,
+ TransportAddress *taddr, int count);
+ int (*set_ras_addr)(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff, unsigned char **data,
+ TransportAddress *taddr, int count);
+ int (*nat_rtp_rtcp)(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
+ unsigned char **data, int dataoff,
+ H245_TransportAddress *taddr,
+ __be16 port, __be16 rtp_port,
+ struct nf_conntrack_expect *rtp_exp,
+ struct nf_conntrack_expect *rtcp_exp);
+ int (*nat_t120)(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
+ unsigned char **data, int dataoff,
+ H245_TransportAddress *taddr, __be16 port,
+ struct nf_conntrack_expect *exp);
+ int (*nat_h245)(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
+ unsigned char **data, int dataoff,
+ TransportAddress *taddr, __be16 port,
+ struct nf_conntrack_expect *exp);
+ int (*nat_callforwarding)(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
+ unsigned char **data, int dataoff,
+ TransportAddress *taddr, __be16 port,
+ struct nf_conntrack_expect *exp);
+ int (*nat_q931)(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ unsigned int protoff,
+ unsigned char **data, TransportAddress *taddr, int idx,
+ __be16 port, struct nf_conntrack_expect *exp);
+};
+extern const struct nfct_h323_nat_hooks __rcu *nfct_h323_nat_hook;
#endif
diff --git a/net/ipv4/netfilter/nf_nat_h323.c b/net/ipv4/netfilter/nf_nat_h323.c
index 76a411ae9fe6..a334f0dcc2d0 100644
--- a/net/ipv4/netfilter/nf_nat_h323.c
+++ b/net/ipv4/netfilter/nf_nat_h323.c
@@ -579,28 +579,22 @@ static struct nf_ct_helper_expectfn callforwarding_nat = {
.expectfn = ip_nat_callforwarding_expect,
};
+static const struct nfct_h323_nat_hooks nathooks = {
+ .set_h245_addr = set_h245_addr,
+ .set_h225_addr = set_h225_addr,
+ .set_sig_addr = set_sig_addr,
+ .set_ras_addr = set_ras_addr,
+ .nat_rtp_rtcp = nat_rtp_rtcp,
+ .nat_t120 = nat_t120,
+ .nat_h245 = nat_h245,
+ .nat_callforwarding = nat_callforwarding,
+ .nat_q931 = nat_q931,
+};
+
/****************************************************************************/
static int __init nf_nat_h323_init(void)
{
- BUG_ON(set_h245_addr_hook != NULL);
- BUG_ON(set_h225_addr_hook != NULL);
- BUG_ON(set_sig_addr_hook != NULL);
- BUG_ON(set_ras_addr_hook != NULL);
- BUG_ON(nat_rtp_rtcp_hook != NULL);
- BUG_ON(nat_t120_hook != NULL);
- BUG_ON(nat_h245_hook != NULL);
- BUG_ON(nat_callforwarding_hook != NULL);
- BUG_ON(nat_q931_hook != NULL);
-
- RCU_INIT_POINTER(set_h245_addr_hook, set_h245_addr);
- RCU_INIT_POINTER(set_h225_addr_hook, set_h225_addr);
- RCU_INIT_POINTER(set_sig_addr_hook, set_sig_addr);
- RCU_INIT_POINTER(set_ras_addr_hook, set_ras_addr);
- RCU_INIT_POINTER(nat_rtp_rtcp_hook, nat_rtp_rtcp);
- RCU_INIT_POINTER(nat_t120_hook, nat_t120);
- RCU_INIT_POINTER(nat_h245_hook, nat_h245);
- RCU_INIT_POINTER(nat_callforwarding_hook, nat_callforwarding);
- RCU_INIT_POINTER(nat_q931_hook, nat_q931);
+ RCU_INIT_POINTER(nfct_h323_nat_hook, &nathooks);
nf_ct_helper_expectfn_register(&q931_nat);
nf_ct_helper_expectfn_register(&callforwarding_nat);
return 0;
@@ -609,15 +603,7 @@ static int __init nf_nat_h323_init(void)
/****************************************************************************/
static void __exit nf_nat_h323_fini(void)
{
- RCU_INIT_POINTER(set_h245_addr_hook, NULL);
- RCU_INIT_POINTER(set_h225_addr_hook, NULL);
- RCU_INIT_POINTER(set_sig_addr_hook, NULL);
- RCU_INIT_POINTER(set_ras_addr_hook, NULL);
- RCU_INIT_POINTER(nat_rtp_rtcp_hook, NULL);
- RCU_INIT_POINTER(nat_t120_hook, NULL);
- RCU_INIT_POINTER(nat_h245_hook, NULL);
- RCU_INIT_POINTER(nat_callforwarding_hook, NULL);
- RCU_INIT_POINTER(nat_q931_hook, NULL);
+ RCU_INIT_POINTER(nfct_h323_nat_hook, NULL);
nf_ct_helper_expectfn_unregister(&q931_nat);
nf_ct_helper_expectfn_unregister(&callforwarding_nat);
synchronize_rcu();
diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c
index 2eb31ffb3d14..bb76305bb7ff 100644
--- a/net/netfilter/nf_conntrack_h323_main.c
+++ b/net/netfilter/nf_conntrack_h323_main.c
@@ -49,64 +49,8 @@ MODULE_PARM_DESC(callforward_filter, "only create call forwarding expectations "
"if both endpoints are on different sides "
"(determined by routing information)");
-/* Hooks for NAT */
-int (*set_h245_addr_hook) (struct sk_buff *skb, unsigned int protoff,
- unsigned char **data, int dataoff,
- H245_TransportAddress *taddr,
- union nf_inet_addr *addr, __be16 port)
- __read_mostly;
-int (*set_h225_addr_hook) (struct sk_buff *skb, unsigned int protoff,
- unsigned char **data, int dataoff,
- TransportAddress *taddr,
- union nf_inet_addr *addr, __be16 port)
- __read_mostly;
-int (*set_sig_addr_hook) (struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff, unsigned char **data,
- TransportAddress *taddr, int count) __read_mostly;
-int (*set_ras_addr_hook) (struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff, unsigned char **data,
- TransportAddress *taddr, int count) __read_mostly;
-int (*nat_rtp_rtcp_hook) (struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff,
- unsigned char **data, int dataoff,
- H245_TransportAddress *taddr,
- __be16 port, __be16 rtp_port,
- struct nf_conntrack_expect *rtp_exp,
- struct nf_conntrack_expect *rtcp_exp) __read_mostly;
-int (*nat_t120_hook) (struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff,
- unsigned char **data, int dataoff,
- H245_TransportAddress *taddr, __be16 port,
- struct nf_conntrack_expect *exp) __read_mostly;
-int (*nat_h245_hook) (struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff,
- unsigned char **data, int dataoff,
- TransportAddress *taddr, __be16 port,
- struct nf_conntrack_expect *exp) __read_mostly;
-int (*nat_callforwarding_hook) (struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff,
- unsigned char **data, int dataoff,
- TransportAddress *taddr, __be16 port,
- struct nf_conntrack_expect *exp) __read_mostly;
-int (*nat_q931_hook) (struct sk_buff *skb,
- struct nf_conn *ct,
- enum ip_conntrack_info ctinfo,
- unsigned int protoff,
- unsigned char **data, TransportAddress *taddr, int idx,
- __be16 port, struct nf_conntrack_expect *exp)
- __read_mostly;
+const struct nfct_h323_nat_hooks __rcu *nfct_h323_nat_hook __read_mostly;
+EXPORT_SYMBOL_GPL(nfct_h323_nat_hook);
static DEFINE_SPINLOCK(nf_h323_lock);
static char *h323_buffer;
@@ -259,6 +203,7 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
unsigned char **data, int dataoff,
H245_TransportAddress *taddr)
{
+ const struct nfct_h323_nat_hooks *nathook;
int dir = CTINFO2DIR(ctinfo);
int ret = 0;
__be16 port;
@@ -266,7 +211,6 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
union nf_inet_addr addr;
struct nf_conntrack_expect *rtp_exp;
struct nf_conntrack_expect *rtcp_exp;
- typeof(nat_rtp_rtcp_hook) nat_rtp_rtcp;
/* Read RTP or RTCP address */
if (!get_h245_addr(ct, *data, taddr, &addr, &port) ||
@@ -296,15 +240,16 @@ static int expect_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
&ct->tuplehash[!dir].tuple.dst.u3,
IPPROTO_UDP, NULL, &rtcp_port);
+ nathook = rcu_dereference(nfct_h323_nat_hook);
if (memcmp(&ct->tuplehash[dir].tuple.src.u3,
&ct->tuplehash[!dir].tuple.dst.u3,
sizeof(ct->tuplehash[dir].tuple.src.u3)) &&
- (nat_rtp_rtcp = rcu_dereference(nat_rtp_rtcp_hook)) &&
+ nathook &&
nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* NAT needed */
- ret = nat_rtp_rtcp(skb, ct, ctinfo, protoff, data, dataoff,
- taddr, port, rtp_port, rtp_exp, rtcp_exp);
+ ret = nathook->nat_rtp_rtcp(skb, ct, ctinfo, protoff, data, dataoff,
+ taddr, port, rtp_port, rtp_exp, rtcp_exp);
} else { /* Conntrack only */
if (nf_ct_expect_related(rtp_exp, 0) == 0) {
if (nf_ct_expect_related(rtcp_exp, 0) == 0) {
@@ -333,12 +278,12 @@ static int expect_t120(struct sk_buff *skb,
unsigned char **data, int dataoff,
H245_TransportAddress *taddr)
{
+ const struct nfct_h323_nat_hooks *nathook;
int dir = CTINFO2DIR(ctinfo);
int ret = 0;
__be16 port;
union nf_inet_addr addr;
struct nf_conntrack_expect *exp;
- typeof(nat_t120_hook) nat_t120;
/* Read T.120 address */
if (!get_h245_addr(ct, *data, taddr, &addr, &port) ||
@@ -355,15 +300,16 @@ static int expect_t120(struct sk_buff *skb,
IPPROTO_TCP, NULL, &port);
exp->flags = NF_CT_EXPECT_PERMANENT; /* Accept multiple channels */
+ nathook = rcu_dereference(nfct_h323_nat_hook);
if (memcmp(&ct->tuplehash[dir].tuple.src.u3,
&ct->tuplehash[!dir].tuple.dst.u3,
sizeof(ct->tuplehash[dir].tuple.src.u3)) &&
- (nat_t120 = rcu_dereference(nat_t120_hook)) &&
+ nathook &&
nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* NAT needed */
- ret = nat_t120(skb, ct, ctinfo, protoff, data, dataoff, taddr,
- port, exp);
+ ret = nathook->nat_t120(skb, ct, ctinfo, protoff, data,
+ dataoff, taddr, port, exp);
} else { /* Conntrack only */
if (nf_ct_expect_related(exp, 0) == 0) {
pr_debug("nf_ct_h323: expect T.120 ");
@@ -664,18 +610,19 @@ int get_h225_addr(struct nf_conn *ct, unsigned char *data,
return 1;
}
+EXPORT_SYMBOL_GPL(get_h225_addr);
static int expect_h245(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned int protoff, unsigned char **data, int dataoff,
TransportAddress *taddr)
{
+ const struct nfct_h323_nat_hooks *nathook;
int dir = CTINFO2DIR(ctinfo);
int ret = 0;
__be16 port;
union nf_inet_addr addr;
struct nf_conntrack_expect *exp;
- typeof(nat_h245_hook) nat_h245;
/* Read h245Address */
if (!get_h225_addr(ct, *data, taddr, &addr, &port) ||
@@ -692,15 +639,16 @@ static int expect_h245(struct sk_buff *skb, struct nf_conn *ct,
IPPROTO_TCP, NULL, &port);
exp->helper = &nf_conntrack_helper_h245;
+ nathook = rcu_dereference(nfct_h323_nat_hook);
if (memcmp(&ct->tuplehash[dir].tuple.src.u3,
&ct->tuplehash[!dir].tuple.dst.u3,
sizeof(ct->tuplehash[dir].tuple.src.u3)) &&
- (nat_h245 = rcu_dereference(nat_h245_hook)) &&
+ nathook &&
nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* NAT needed */
- ret = nat_h245(skb, ct, ctinfo, protoff, data, dataoff, taddr,
- port, exp);
+ ret = nathook->nat_h245(skb, ct, ctinfo, protoff, data,
+ dataoff, taddr, port, exp);
} else { /* Conntrack only */
if (nf_ct_expect_related(exp, 0) == 0) {
pr_debug("nf_ct_q931: expect H.245 ");
@@ -785,13 +733,13 @@ static int expect_callforwarding(struct sk_buff *skb,
unsigned char **data, int dataoff,
TransportAddress *taddr)
{
+ const struct nfct_h323_nat_hooks *nathook;
int dir = CTINFO2DIR(ctinfo);
int ret = 0;
__be16 port;
union nf_inet_addr addr;
struct nf_conntrack_expect *exp;
struct net *net = nf_ct_net(ct);
- typeof(nat_callforwarding_hook) nat_callforwarding;
/* Read alternativeAddress */
if (!get_h225_addr(ct, *data, taddr, &addr, &port) || port == 0)
@@ -815,16 +763,17 @@ static int expect_callforwarding(struct sk_buff *skb,
IPPROTO_TCP, NULL, &port);
exp->helper = nf_conntrack_helper_q931;
+ nathook = rcu_dereference(nfct_h323_nat_hook);
if (memcmp(&ct->tuplehash[dir].tuple.src.u3,
&ct->tuplehash[!dir].tuple.dst.u3,
sizeof(ct->tuplehash[dir].tuple.src.u3)) &&
- (nat_callforwarding = rcu_dereference(nat_callforwarding_hook)) &&
+ nathook &&
nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* Need NAT */
- ret = nat_callforwarding(skb, ct, ctinfo,
- protoff, data, dataoff,
- taddr, port, exp);
+ ret = nathook->nat_callforwarding(skb, ct, ctinfo,
+ protoff, data, dataoff,
+ taddr, port, exp);
} else { /* Conntrack only */
if (nf_ct_expect_related(exp, 0) == 0) {
pr_debug("nf_ct_q931: expect Call Forwarding ");
@@ -844,12 +793,12 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
unsigned char **data, int dataoff,
Setup_UUIE *setup)
{
+ const struct nfct_h323_nat_hooks *nathook;
int dir = CTINFO2DIR(ctinfo);
int ret;
int i;
__be16 port;
union nf_inet_addr addr;
- typeof(set_h225_addr_hook) set_h225_addr;
pr_debug("nf_ct_q931: Setup\n");
@@ -860,9 +809,9 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
return -1;
}
- set_h225_addr = rcu_dereference(set_h225_addr_hook);
+ nathook = rcu_dereference(nfct_h323_nat_hook);
if ((setup->options & eSetup_UUIE_destCallSignalAddress) &&
- (set_h225_addr) && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK &&
get_h225_addr(ct, *data, &setup->destCallSignalAddress,
&addr, &port) &&
@@ -870,16 +819,16 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_q931: set destCallSignalAddress %pI6:%hu->%pI6:%hu\n",
&addr, ntohs(port), &ct->tuplehash[!dir].tuple.src.u3,
ntohs(ct->tuplehash[!dir].tuple.src.u.tcp.port));
- ret = set_h225_addr(skb, protoff, data, dataoff,
- &setup->destCallSignalAddress,
- &ct->tuplehash[!dir].tuple.src.u3,
- ct->tuplehash[!dir].tuple.src.u.tcp.port);
+ ret = nathook->set_h225_addr(skb, protoff, data, dataoff,
+ &setup->destCallSignalAddress,
+ &ct->tuplehash[!dir].tuple.src.u3,
+ ct->tuplehash[!dir].tuple.src.u.tcp.port);
if (ret < 0)
return -1;
}
if ((setup->options & eSetup_UUIE_sourceCallSignalAddress) &&
- (set_h225_addr) && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK &&
get_h225_addr(ct, *data, &setup->sourceCallSignalAddress,
&addr, &port) &&
@@ -887,10 +836,10 @@ static int process_setup(struct sk_buff *skb, struct nf_conn *ct,
pr_debug("nf_ct_q931: set sourceCallSignalAddress %pI6:%hu->%pI6:%hu\n",
&addr, ntohs(port), &ct->tuplehash[!dir].tuple.dst.u3,
ntohs(ct->tuplehash[!dir].tuple.dst.u.tcp.port));
- ret = set_h225_addr(skb, protoff, data, dataoff,
- &setup->sourceCallSignalAddress,
- &ct->tuplehash[!dir].tuple.dst.u3,
- ct->tuplehash[!dir].tuple.dst.u.tcp.port);
+ ret = nathook->set_h225_addr(skb, protoff, data, dataoff,
+ &setup->sourceCallSignalAddress,
+ &ct->tuplehash[!dir].tuple.dst.u3,
+ ct->tuplehash[!dir].tuple.dst.u.tcp.port);
if (ret < 0)
return -1;
}
@@ -1249,13 +1198,13 @@ static int expect_q931(struct sk_buff *skb, struct nf_conn *ct,
TransportAddress *taddr, int count)
{
struct nf_ct_h323_master *info = nfct_help_data(ct);
+ const struct nfct_h323_nat_hooks *nathook;
int dir = CTINFO2DIR(ctinfo);
int ret = 0;
int i;
__be16 port;
union nf_inet_addr addr;
struct nf_conntrack_expect *exp;
- typeof(nat_q931_hook) nat_q931;
/* Look for the first related address */
for (i = 0; i < count; i++) {
@@ -1279,11 +1228,11 @@ static int expect_q931(struct sk_buff *skb, struct nf_conn *ct,
exp->helper = nf_conntrack_helper_q931;
exp->flags = NF_CT_EXPECT_PERMANENT; /* Accept multiple calls */
- nat_q931 = rcu_dereference(nat_q931_hook);
- if (nat_q931 && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ nathook = rcu_dereference(nfct_h323_nat_hook);
+ if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) { /* Need NAT */
- ret = nat_q931(skb, ct, ctinfo, protoff, data,
- taddr, i, port, exp);
+ ret = nathook->nat_q931(skb, ct, ctinfo, protoff, data,
+ taddr, i, port, exp);
} else { /* Conntrack only */
if (nf_ct_expect_related(exp, 0) == 0) {
pr_debug("nf_ct_ras: expect Q.931 ");
@@ -1305,15 +1254,15 @@ static int process_grq(struct sk_buff *skb, struct nf_conn *ct,
unsigned int protoff,
unsigned char **data, GatekeeperRequest *grq)
{
- typeof(set_ras_addr_hook) set_ras_addr;
+ const struct nfct_h323_nat_hooks *nathook;
pr_debug("nf_ct_ras: GRQ\n");
- set_ras_addr = rcu_dereference(set_ras_addr_hook);
- if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ nathook = rcu_dereference(nfct_h323_nat_hook);
+ if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) /* NATed */
- return set_ras_addr(skb, ct, ctinfo, protoff, data,
- &grq->rasAddress, 1);
+ return nathook->set_ras_addr(skb, ct, ctinfo, protoff, data,
+ &grq->rasAddress, 1);
return 0;
}
@@ -1367,8 +1316,8 @@ static int process_rrq(struct sk_buff *skb, struct nf_conn *ct,
unsigned char **data, RegistrationRequest *rrq)
{
struct nf_ct_h323_master *info = nfct_help_data(ct);
+ const struct nfct_h323_nat_hooks *nathook;
int ret;
- typeof(set_ras_addr_hook) set_ras_addr;
pr_debug("nf_ct_ras: RRQ\n");
@@ -1378,12 +1327,12 @@ static int process_rrq(struct sk_buff *skb, struct nf_conn *ct,
if (ret < 0)
return -1;
- set_ras_addr = rcu_dereference(set_ras_addr_hook);
- if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ nathook = rcu_dereference(nfct_h323_nat_hook);
+ if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
- ret = set_ras_addr(skb, ct, ctinfo, protoff, data,
- rrq->rasAddress.item,
- rrq->rasAddress.count);
+ ret = nathook->set_ras_addr(skb, ct, ctinfo, protoff, data,
+ rrq->rasAddress.item,
+ rrq->rasAddress.count);
if (ret < 0)
return -1;
}
@@ -1403,19 +1352,19 @@ static int process_rcf(struct sk_buff *skb, struct nf_conn *ct,
unsigned char **data, RegistrationConfirm *rcf)
{
struct nf_ct_h323_master *info = nfct_help_data(ct);
+ const struct nfct_h323_nat_hooks *nathook;
int dir = CTINFO2DIR(ctinfo);
int ret;
struct nf_conntrack_expect *exp;
- typeof(set_sig_addr_hook) set_sig_addr;
pr_debug("nf_ct_ras: RCF\n");
- set_sig_addr = rcu_dereference(set_sig_addr_hook);
- if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ nathook = rcu_dereference(nfct_h323_nat_hook);
+ if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
- ret = set_sig_addr(skb, ct, ctinfo, protoff, data,
- rcf->callSignalAddress.item,
- rcf->callSignalAddress.count);
+ ret = nathook->set_sig_addr(skb, ct, ctinfo, protoff, data,
+ rcf->callSignalAddress.item,
+ rcf->callSignalAddress.count);
if (ret < 0)
return -1;
}
@@ -1454,18 +1403,18 @@ static int process_urq(struct sk_buff *skb, struct nf_conn *ct,
unsigned char **data, UnregistrationRequest *urq)
{
struct nf_ct_h323_master *info = nfct_help_data(ct);
+ const struct nfct_h323_nat_hooks *nathook;
int dir = CTINFO2DIR(ctinfo);
int ret;
- typeof(set_sig_addr_hook) set_sig_addr;
pr_debug("nf_ct_ras: URQ\n");
- set_sig_addr = rcu_dereference(set_sig_addr_hook);
- if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ nathook = rcu_dereference(nfct_h323_nat_hook);
+ if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
- ret = set_sig_addr(skb, ct, ctinfo, protoff, data,
- urq->callSignalAddress.item,
- urq->callSignalAddress.count);
+ ret = nathook->set_sig_addr(skb, ct, ctinfo, protoff, data,
+ urq->callSignalAddress.item,
+ urq->callSignalAddress.count);
if (ret < 0)
return -1;
}
@@ -1487,39 +1436,42 @@ static int process_arq(struct sk_buff *skb, struct nf_conn *ct,
unsigned char **data, AdmissionRequest *arq)
{
const struct nf_ct_h323_master *info = nfct_help_data(ct);
+ const struct nfct_h323_nat_hooks *nathook;
int dir = CTINFO2DIR(ctinfo);
__be16 port;
union nf_inet_addr addr;
- typeof(set_h225_addr_hook) set_h225_addr;
pr_debug("nf_ct_ras: ARQ\n");
- set_h225_addr = rcu_dereference(set_h225_addr_hook);
+ nathook = rcu_dereference(nfct_h323_nat_hook);
+ if (!nathook)
+ return 0;
+
if ((arq->options & eAdmissionRequest_destCallSignalAddress) &&
get_h225_addr(ct, *data, &arq->destCallSignalAddress,
&addr, &port) &&
!memcmp(&addr, &ct->tuplehash[dir].tuple.src.u3, sizeof(addr)) &&
port == info->sig_port[dir] &&
nf_ct_l3num(ct) == NFPROTO_IPV4 &&
- set_h225_addr && ct->status & IPS_NAT_MASK) {
+ ct->status & IPS_NAT_MASK) {
/* Answering ARQ */
- return set_h225_addr(skb, protoff, data, 0,
- &arq->destCallSignalAddress,
- &ct->tuplehash[!dir].tuple.dst.u3,
- info->sig_port[!dir]);
+ return nathook->set_h225_addr(skb, protoff, data, 0,
+ &arq->destCallSignalAddress,
+ &ct->tuplehash[!dir].tuple.dst.u3,
+ info->sig_port[!dir]);
}
if ((arq->options & eAdmissionRequest_srcCallSignalAddress) &&
get_h225_addr(ct, *data, &arq->srcCallSignalAddress,
&addr, &port) &&
!memcmp(&addr, &ct->tuplehash[dir].tuple.src.u3, sizeof(addr)) &&
- set_h225_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
/* Calling ARQ */
- return set_h225_addr(skb, protoff, data, 0,
- &arq->srcCallSignalAddress,
- &ct->tuplehash[!dir].tuple.dst.u3,
- port);
+ return nathook->set_h225_addr(skb, protoff, data, 0,
+ &arq->srcCallSignalAddress,
+ &ct->tuplehash[!dir].tuple.dst.u3,
+ port);
}
return 0;
@@ -1535,7 +1487,6 @@ static int process_acf(struct sk_buff *skb, struct nf_conn *ct,
__be16 port;
union nf_inet_addr addr;
struct nf_conntrack_expect *exp;
- typeof(set_sig_addr_hook) set_sig_addr;
pr_debug("nf_ct_ras: ACF\n");
@@ -1544,12 +1495,15 @@ static int process_acf(struct sk_buff *skb, struct nf_conn *ct,
return 0;
if (!memcmp(&addr, &ct->tuplehash[dir].tuple.dst.u3, sizeof(addr))) {
+ const struct nfct_h323_nat_hooks *nathook;
+
/* Answering ACF */
- set_sig_addr = rcu_dereference(set_sig_addr_hook);
- if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ nathook = rcu_dereference(nfct_h323_nat_hook);
+ if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK)
- return set_sig_addr(skb, ct, ctinfo, protoff, data,
- &acf->destCallSignalAddress, 1);
+ return nathook->set_sig_addr(skb, ct, ctinfo, protoff,
+ data,
+ &acf->destCallSignalAddress, 1);
return 0;
}
@@ -1578,15 +1532,15 @@ static int process_lrq(struct sk_buff *skb, struct nf_conn *ct,
unsigned int protoff,
unsigned char **data, LocationRequest *lrq)
{
- typeof(set_ras_addr_hook) set_ras_addr;
+ const struct nfct_h323_nat_hooks *nathook;
pr_debug("nf_ct_ras: LRQ\n");
- set_ras_addr = rcu_dereference(set_ras_addr_hook);
- if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ nathook = rcu_dereference(nfct_h323_nat_hook);
+ if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK)
- return set_ras_addr(skb, ct, ctinfo, protoff, data,
- &lrq->replyAddress, 1);
+ return nathook->set_ras_addr(skb, ct, ctinfo, protoff, data,
+ &lrq->replyAddress, 1);
return 0;
}
@@ -1634,27 +1588,22 @@ static int process_irr(struct sk_buff *skb, struct nf_conn *ct,
unsigned int protoff,
unsigned char **data, InfoRequestResponse *irr)
{
+ const struct nfct_h323_nat_hooks *nathook;
int ret;
- typeof(set_ras_addr_hook) set_ras_addr;
- typeof(set_sig_addr_hook) set_sig_addr;
pr_debug("nf_ct_ras: IRR\n");
- set_ras_addr = rcu_dereference(set_ras_addr_hook);
- if (set_ras_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
+ nathook = rcu_dereference(nfct_h323_nat_hook);
+ if (nathook && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
ct->status & IPS_NAT_MASK) {
- ret = set_ras_addr(skb, ct, ctinfo, protoff, data,
- &irr->rasAddress, 1);
+ ret = nathook->set_ras_addr(skb, ct, ctinfo, protoff, data,
+ &irr->rasAddress, 1);
if (ret < 0)
return -1;
- }
- set_sig_addr = rcu_dereference(set_sig_addr_hook);
- if (set_sig_addr && nf_ct_l3num(ct) == NFPROTO_IPV4 &&
- ct->status & IPS_NAT_MASK) {
- ret = set_sig_addr(skb, ct, ctinfo, protoff, data,
- irr->callSignalAddress.item,
- irr->callSignalAddress.count);
+ ret = nathook->set_sig_addr(skb, ct, ctinfo, protoff, data,
+ irr->callSignalAddress.item,
+ irr->callSignalAddress.count);
if (ret < 0)
return -1;
}
@@ -1837,17 +1786,6 @@ static int __init nf_conntrack_h323_init(void)
module_init(nf_conntrack_h323_init);
module_exit(nf_conntrack_h323_fini);
-EXPORT_SYMBOL_GPL(get_h225_addr);
-EXPORT_SYMBOL_GPL(set_h245_addr_hook);
-EXPORT_SYMBOL_GPL(set_h225_addr_hook);
-EXPORT_SYMBOL_GPL(set_sig_addr_hook);
-EXPORT_SYMBOL_GPL(set_ras_addr_hook);
-EXPORT_SYMBOL_GPL(nat_rtp_rtcp_hook);
-EXPORT_SYMBOL_GPL(nat_t120_hook);
-EXPORT_SYMBOL_GPL(nat_h245_hook);
-EXPORT_SYMBOL_GPL(nat_callforwarding_hook);
-EXPORT_SYMBOL_GPL(nat_q931_hook);
-
MODULE_AUTHOR("Jing Min Zhao <zhaojingmin@users.sourceforge.net>");
MODULE_DESCRIPTION("H.323 connection tracking helper");
MODULE_LICENSE("GPL");
--
2.35.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH nf-next v2 0/3] netfilter: conntrack sparse annotations
2022-06-22 9:00 [PATCH nf-next v2 0/3] netfilter: conntrack sparse annotations Florian Westphal
` (2 preceding siblings ...)
2022-06-22 9:00 ` [PATCH nf-next v2 3/3] netfilter: h323: merge nat hook pointers into one Florian Westphal
@ 2022-07-11 14:38 ` Pablo Neira Ayuso
3 siblings, 0 replies; 5+ messages in thread
From: Pablo Neira Ayuso @ 2022-07-11 14:38 UTC (permalink / raw)
To: Florian Westphal; +Cc: netfilter-devel
On Wed, Jun 22, 2022 at 11:00:44AM +0200, Florian Westphal wrote:
> This series reduces the number of generated sparse warnings
> in the netfilter codebase.
>
> In some cases its just due to a missing '__rcu' annotation
> of the base pointer, but in some other cases there is a
> direct access to a __rcu annotated base pointer.
Series applied, thanks
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2022-07-11 14:38 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-06-22 9:00 [PATCH nf-next v2 0/3] netfilter: conntrack sparse annotations Florian Westphal
2022-06-22 9:00 ` [PATCH nf-next v2 1/3] netfilter: nf_conntrack: add missing __rcu annotations Florian Westphal
2022-06-22 9:00 ` [PATCH nf-next v2 2/3] netfilter: nf_conntrack: use rcu accessors where needed Florian Westphal
2022-06-22 9:00 ` [PATCH nf-next v2 3/3] netfilter: h323: merge nat hook pointers into one Florian Westphal
2022-07-11 14:38 ` [PATCH nf-next v2 0/3] netfilter: conntrack sparse annotations Pablo Neira Ayuso
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