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netfilter: conntrack: remove l4proto init and get_net callbacks

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Those were needed we still had modular trackers.
As we don't have those anymore, prefer direct calls and remove all
the (un)register infrastructure associated with this.

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 22:03:45 +01:00 committed by Pablo Neira Ayuso
parent 70aed4647c
commit 2a389de86e
11 changed files with 64 additions and 233 deletions
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15
include/net/netfilter/nf_conntrack_l4proto.h
View File

@ -61,12 +61,6 @@ struct nf_conntrack_l4proto {
/* Print out the private part of the conntrack. */
void (*print_conntrack)(struct seq_file *s, struct nf_conn *);
#endif
/* Init l4proto pernet data */
int (*init_net)(struct net *net);
/* Return the per-net protocol part. */
struct nf_proto_net *(*get_net_proto)(struct net *net);
};
bool icmp_pkt_to_tuple(const struct sk_buff *skb,
@ -135,6 +129,15 @@ int nf_conntrack_gre_packet(struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
const struct nf_hook_state *state);
void nf_conntrack_generic_init_net(struct net *net);
void nf_conntrack_tcp_init_net(struct net *net);
void nf_conntrack_udp_init_net(struct net *net);
void nf_conntrack_gre_init_net(struct net *net);
void nf_conntrack_dccp_init_net(struct net *net);
void nf_conntrack_sctp_init_net(struct net *net);
void nf_conntrack_icmp_init_net(struct net *net);
void nf_conntrack_icmpv6_init_net(struct net *net);
/* Existing built-in generic protocol */
extern const struct nf_conntrack_l4proto nf_conntrack_l4proto_generic;

11
include/net/netns/conntrack.h
View File

@ -18,17 +18,11 @@
struct ctl_table_header;
struct nf_conntrack_ecache;
struct nf_proto_net {
unsigned int users;
};
struct nf_generic_net {
struct nf_proto_net pn;
unsigned int timeout;
};
struct nf_tcp_net {
struct nf_proto_net pn;
unsigned int timeouts[TCP_CONNTRACK_TIMEOUT_MAX];
unsigned int tcp_loose;
unsigned int tcp_be_liberal;
@ -42,18 +36,15 @@ enum udp_conntrack {
};
struct nf_udp_net {
struct nf_proto_net pn;
unsigned int timeouts[UDP_CT_MAX];
};
struct nf_icmp_net {
struct nf_proto_net pn;
unsigned int timeout;
};
#ifdef CONFIG_NF_CT_PROTO_DCCP
struct nf_dccp_net {
struct nf_proto_net pn;
int dccp_loose;
unsigned int dccp_timeout[CT_DCCP_MAX + 1];
};
@ -61,7 +52,6 @@ struct nf_dccp_net {
#ifdef CONFIG_NF_CT_PROTO_SCTP
struct nf_sctp_net {
struct nf_proto_net pn;
unsigned int timeouts[SCTP_CONNTRACK_MAX];
};
#endif
@ -74,7 +64,6 @@ enum gre_conntrack {
};
struct nf_gre_net {
struct nf_proto_net nf;
struct list_head keymap_list;
unsigned int timeouts[GRE_CT_MAX];
};

103
net/netfilter/nf_conntrack_proto.c
View File

@ -123,15 +123,6 @@ static int kill_l4proto(struct nf_conn *i, void *data)
return nf_ct_protonum(i) == l4proto->l4proto;
}
static struct nf_proto_net *nf_ct_l4proto_net(struct net *net,
const struct nf_conntrack_l4proto *l4proto)
{
if (l4proto->get_net_proto)
return l4proto->get_net_proto(net);
return NULL;
}
/* FIXME: Allow NULL functions and sub in pointers to generic for
them. --RR */
int nf_ct_l4proto_register_one(const struct nf_conntrack_l4proto *l4proto)
@ -158,27 +149,6 @@ out_unlock:
}
EXPORT_SYMBOL_GPL(nf_ct_l4proto_register_one);
static int nf_ct_l4proto_pernet_register_one(struct net *net,
const struct nf_conntrack_l4proto *l4proto)
{
int ret = 0;
struct nf_proto_net *pn = NULL;
if (l4proto->init_net) {
ret = l4proto->init_net(net);
if (ret < 0)
goto out;
}
pn = nf_ct_l4proto_net(net, l4proto);
if (pn == NULL)
goto out;
pn->users++;
out:
return ret;
}
static void __nf_ct_l4proto_unregister_one(const struct nf_conntrack_l4proto *l4proto)
{
@ -204,17 +174,6 @@ void nf_ct_l4proto_unregister_one(const struct nf_conntrack_l4proto *l4proto)
}
EXPORT_SYMBOL_GPL(nf_ct_l4proto_unregister_one);
static void nf_ct_l4proto_pernet_unregister_one(struct net *net,
const struct nf_conntrack_l4proto *l4proto)
{
struct nf_proto_net *pn = nf_ct_l4proto_net(net, l4proto);
if (pn == NULL)
return;
pn->users--;
}
static void
nf_ct_l4proto_unregister(const struct nf_conntrack_l4proto * const l4proto[],
unsigned int num_proto)
@ -252,34 +211,6 @@ nf_ct_l4proto_register(const struct nf_conntrack_l4proto * const l4proto[],
return ret;
}
static void nf_ct_l4proto_pernet_unregister(struct net *net,
const struct nf_conntrack_l4proto *const l4proto[],
unsigned int num_proto)
{
while (num_proto-- != 0)
nf_ct_l4proto_pernet_unregister_one(net, l4proto[num_proto]);
}
static int nf_ct_l4proto_pernet_register(struct net *net,
const struct nf_conntrack_l4proto *const l4proto[],
unsigned int num_proto)
{
int ret = -EINVAL;
unsigned int i;
for (i = 0; i < num_proto; i++) {
ret = nf_ct_l4proto_pernet_register_one(net, l4proto[i]);
if (ret < 0)
break;
}
if (i != num_proto) {
pr_err("nf_conntrack %d: pernet registration failed\n",
l4proto[i]->l4proto);
nf_ct_l4proto_pernet_unregister(net, l4proto, i);
}
return ret;
}
static unsigned int nf_confirm(struct sk_buff *skb,
unsigned int protoff,
struct nf_conn *ct,
@ -784,31 +715,25 @@ void nf_conntrack_proto_fini(void)
int nf_conntrack_proto_pernet_init(struct net *net)
{
int err;
struct nf_proto_net *pn = nf_ct_l4proto_net(net,
&nf_conntrack_l4proto_generic);
err = nf_conntrack_l4proto_generic.init_net(net);
if (err < 0)
return err;
err = nf_ct_l4proto_pernet_register(net, builtin_l4proto,
ARRAY_SIZE(builtin_l4proto));
if (err < 0)
return err;
pn->users++;
nf_conntrack_generic_init_net(net);
nf_conntrack_udp_init_net(net);
nf_conntrack_tcp_init_net(net);
nf_conntrack_icmp_init_net(net);
nf_conntrack_icmpv6_init_net(net);
#ifdef CONFIG_NF_CT_PROTO_DCCP
nf_conntrack_dccp_init_net(net);
#endif
#ifdef CONFIG_NF_CT_PROTO_SCTP
nf_conntrack_sctp_init_net(net);
#endif
#ifdef CONFIG_NF_CT_PROTO_GRE
nf_conntrack_gre_init_net(net);
#endif
return 0;
}
void nf_conntrack_proto_pernet_fini(struct net *net)
{
struct nf_proto_net *pn = nf_ct_l4proto_net(net,
&nf_conntrack_l4proto_generic);
nf_ct_l4proto_pernet_unregister(net, builtin_l4proto,
ARRAY_SIZE(builtin_l4proto));
pn->users--;
#ifdef CONFIG_NF_CT_PROTO_GRE
nf_ct_gre_keymap_flush(net);
#endif

40
net/netfilter/nf_conntrack_proto_dccp.c
View File

@ -724,34 +724,24 @@ dccp_timeout_nla_policy[CTA_TIMEOUT_DCCP_MAX+1] = {
};
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
static int dccp_init_net(struct net *net)
void nf_conntrack_dccp_init_net(struct net *net)
{
struct nf_dccp_net *dn = nf_dccp_pernet(net);
struct nf_proto_net *pn = &dn->pn;
if (!pn->users) {
/* default values */
dn->dccp_loose = 1;
dn->dccp_timeout[CT_DCCP_REQUEST] = 2 * DCCP_MSL;
dn->dccp_timeout[CT_DCCP_RESPOND] = 4 * DCCP_MSL;
dn->dccp_timeout[CT_DCCP_PARTOPEN] = 4 * DCCP_MSL;
dn->dccp_timeout[CT_DCCP_OPEN] = 12 * 3600 * HZ;
dn->dccp_timeout[CT_DCCP_CLOSEREQ] = 64 * HZ;
dn->dccp_timeout[CT_DCCP_CLOSING] = 64 * HZ;
dn->dccp_timeout[CT_DCCP_TIMEWAIT] = 2 * DCCP_MSL;
/* default values */
dn->dccp_loose = 1;
dn->dccp_timeout[CT_DCCP_REQUEST] = 2 * DCCP_MSL;
dn->dccp_timeout[CT_DCCP_RESPOND] = 4 * DCCP_MSL;
dn->dccp_timeout[CT_DCCP_PARTOPEN] = 4 * DCCP_MSL;
dn->dccp_timeout[CT_DCCP_OPEN] = 12 * 3600 * HZ;
dn->dccp_timeout[CT_DCCP_CLOSEREQ] = 64 * HZ;
dn->dccp_timeout[CT_DCCP_CLOSING] = 64 * HZ;
dn->dccp_timeout[CT_DCCP_TIMEWAIT] = 2 * DCCP_MSL;
/* timeouts[0] is unused, make it same as SYN_SENT so
* ->timeouts[0] contains 'new' timeout, like udp or icmp.
*/
dn->dccp_timeout[CT_DCCP_NONE] = dn->dccp_timeout[CT_DCCP_REQUEST];
}
return 0;
}
static struct nf_proto_net *dccp_get_net_proto(struct net *net)
{
return &net->ct.nf_ct_proto.dccp.pn;
/* timeouts[0] is unused, make it same as SYN_SENT so
* ->timeouts[0] contains 'new' timeout, like udp or icmp.
*/
dn->dccp_timeout[CT_DCCP_NONE] = dn->dccp_timeout[CT_DCCP_REQUEST];
}
const struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp = {
@ -778,6 +768,4 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp = {
.nla_policy = dccp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
.init_net = dccp_init_net,
.get_net_proto = dccp_get_net_proto,
};

11
net/netfilter/nf_conntrack_proto_generic.c
View File

@ -60,18 +60,11 @@ generic_timeout_nla_policy[CTA_TIMEOUT_GENERIC_MAX+1] = {
};
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
static int generic_init_net(struct net *net)
void nf_conntrack_generic_init_net(struct net *net)
{
struct nf_generic_net *gn = nf_generic_pernet(net);
gn->timeout = nf_ct_generic_timeout;
return 0;
}
static struct nf_proto_net *generic_get_net_proto(struct net *net)
{
return &net->ct.nf_ct_proto.generic.pn;
}
const struct nf_conntrack_l4proto nf_conntrack_l4proto_generic =
@ -86,6 +79,4 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_generic =
.nla_policy = generic_timeout_nla_policy,
},
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
.init_net = generic_init_net,
.get_net_proto = generic_get_net_proto,
};

5
net/netfilter/nf_conntrack_proto_gre.c
View File

@ -313,7 +313,7 @@ gre_timeout_nla_policy[CTA_TIMEOUT_GRE_MAX+1] = {
};
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
static int gre_init_net(struct net *net)
void nf_conntrack_gre_init_net(struct net *net)
{
struct nf_gre_net *net_gre = gre_pernet(net);
int i;
@ -321,8 +321,6 @@ static int gre_init_net(struct net *net)
INIT_LIST_HEAD(&net_gre->keymap_list);
for (i = 0; i < GRE_CT_MAX; i++)
net_gre->timeouts[i] = gre_timeouts[i];
return 0;
}
/* protocol helper struct */
@ -347,5 +345,4 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_gre = {
.nla_policy = gre_timeout_nla_policy,
},
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
.init_net = gre_init_net,
};

12
net/netfilter/nf_conntrack_proto_icmp.c
View File

@ -298,19 +298,11 @@ icmp_timeout_nla_policy[CTA_TIMEOUT_ICMP_MAX+1] = {
};
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
static int icmp_init_net(struct net *net)
void nf_conntrack_icmp_init_net(struct net *net)
{
struct nf_icmp_net *in = nf_icmp_pernet(net);
in->timeout = nf_ct_icmp_timeout;
return 0;
}
static struct nf_proto_net *icmp_get_net_proto(struct net *net)
{
return &net->ct.nf_ct_proto.icmp.pn;
}
const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp =
@ -331,6 +323,4 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp =
.nla_policy = icmp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
.init_net = icmp_init_net,
.get_net_proto = icmp_get_net_proto,
};

12
net/netfilter/nf_conntrack_proto_icmpv6.c
View File

@ -309,19 +309,11 @@ icmpv6_timeout_nla_policy[CTA_TIMEOUT_ICMPV6_MAX+1] = {
};
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
static int icmpv6_init_net(struct net *net)
void nf_conntrack_icmpv6_init_net(struct net *net)
{
struct nf_icmp_net *in = nf_icmpv6_pernet(net);
in->timeout = nf_ct_icmpv6_timeout;
return 0;
}
static struct nf_proto_net *icmpv6_get_net_proto(struct net *net)
{
return &net->ct.nf_ct_proto.icmpv6.pn;
}
const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6 =
@ -342,6 +334,4 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6 =
.nla_policy = icmpv6_timeout_nla_policy,
},
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
.init_net = icmpv6_init_net,
.get_net_proto = icmpv6_get_net_proto,
};

29
net/netfilter/nf_conntrack_proto_sctp.c
View File

@ -642,29 +642,18 @@ sctp_timeout_nla_policy[CTA_TIMEOUT_SCTP_MAX+1] = {
};
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
static int sctp_init_net(struct net *net)
void nf_conntrack_sctp_init_net(struct net *net)
{
struct nf_sctp_net *sn = nf_sctp_pernet(net);
struct nf_proto_net *pn = &sn->pn;
int i;
if (!pn->users) {
int i;
for (i = 0; i < SCTP_CONNTRACK_MAX; i++)
sn->timeouts[i] = sctp_timeouts[i];
for (i = 0; i < SCTP_CONNTRACK_MAX; i++)
sn->timeouts[i] = sctp_timeouts[i];
/* timeouts[0] is unused, init it so ->timeouts[0] contains
* 'new' timeout, like udp or icmp.
*/
sn->timeouts[0] = sctp_timeouts[SCTP_CONNTRACK_CLOSED];
}
return 0;
}
static struct nf_proto_net *sctp_get_net_proto(struct net *net)
{
return &net->ct.nf_ct_proto.sctp.pn;
/* timeouts[0] is unused, init it so ->timeouts[0] contains
* 'new' timeout, like udp or icmp.
*/
sn->timeouts[0] = sctp_timeouts[SCTP_CONNTRACK_CLOSED];
}
const struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp = {
@ -691,6 +680,4 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp = {
.nla_policy = sctp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
.init_net = sctp_init_net,
.get_net_proto = sctp_get_net_proto,
};

35
net/netfilter/nf_conntrack_proto_tcp.c
View File

@ -1387,32 +1387,21 @@ static const struct nla_policy tcp_timeout_nla_policy[CTA_TIMEOUT_TCP_MAX+1] = {
};
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
static int tcp_init_net(struct net *net)
void nf_conntrack_tcp_init_net(struct net *net)
{
struct nf_tcp_net *tn = nf_tcp_pernet(net);
struct nf_proto_net *pn = &tn->pn;
int i;
if (!pn->users) {
int i;
for (i = 0; i < TCP_CONNTRACK_TIMEOUT_MAX; i++)
tn->timeouts[i] = tcp_timeouts[i];
for (i = 0; i < TCP_CONNTRACK_TIMEOUT_MAX; i++)
tn->timeouts[i] = tcp_timeouts[i];
/* timeouts[0] is unused, make it same as SYN_SENT so
* ->timeouts[0] contains 'new' timeout, like udp or icmp.
*/
tn->timeouts[0] = tcp_timeouts[TCP_CONNTRACK_SYN_SENT];
tn->tcp_loose = nf_ct_tcp_loose;
tn->tcp_be_liberal = nf_ct_tcp_be_liberal;
tn->tcp_max_retrans = nf_ct_tcp_max_retrans;
}
return 0;
}
static struct nf_proto_net *tcp_get_net_proto(struct net *net)
{
return &net->ct.nf_ct_proto.tcp.pn;
/* timeouts[0] is unused, make it same as SYN_SENT so
* ->timeouts[0] contains 'new' timeout, like udp or icmp.
*/
tn->timeouts[0] = tcp_timeouts[TCP_CONNTRACK_SYN_SENT];
tn->tcp_loose = nf_ct_tcp_loose;
tn->tcp_be_liberal = nf_ct_tcp_be_liberal;
tn->tcp_max_retrans = nf_ct_tcp_max_retrans;
}
const struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp =
@ -1441,6 +1430,4 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp =
.nla_policy = tcp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
.init_net = tcp_init_net,
.get_net_proto = tcp_get_net_proto,
};

24
net/netfilter/nf_conntrack_proto_udp.c
View File

@ -260,25 +260,13 @@ udp_timeout_nla_policy[CTA_TIMEOUT_UDP_MAX+1] = {
};
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
static int udp_init_net(struct net *net)
void nf_conntrack_udp_init_net(struct net *net)
{
struct nf_udp_net *un = nf_udp_pernet(net);
struct nf_proto_net *pn = &un->pn;
int i;
if (!pn->users) {
int i;
for (i = 0; i < UDP_CT_MAX; i++)
un->timeouts[i] = udp_timeouts[i];
}
return 0;
}
static struct nf_proto_net *udp_get_net_proto(struct net *net)
{
return &net->ct.nf_ct_proto.udp.pn;
for (i = 0; i < UDP_CT_MAX; i++)
un->timeouts[i] = udp_timeouts[i];
}
const struct nf_conntrack_l4proto nf_conntrack_l4proto_udp =
@ -300,8 +288,6 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_udp =
.nla_policy = udp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
.init_net = udp_init_net,
.get_net_proto = udp_get_net_proto,
};
#ifdef CONFIG_NF_CT_PROTO_UDPLITE
@ -324,7 +310,5 @@ const struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite =
.nla_policy = udp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
.init_net = udp_init_net,
.get_net_proto = udp_get_net_proto,
};
#endif