#define _NF_CONNTRACK_ECACHE_H
#include <net/netfilter/nf_conntrack.h>
-#include <linux/interrupt.h>
#include <net/net_namespace.h>
#include <net/netfilter/nf_conntrack_expect.h>
+#include <linux/netfilter/nf_conntrack_common.h>
+#include <linux/netfilter/nf_conntrack_tuple_common.h>
+#include <net/netfilter/nf_conntrack_extend.h>
-/* Connection tracking event bits */
+/* Connection tracking event types */
enum ip_conntrack_events
{
- /* New conntrack */
- IPCT_NEW_BIT = 0,
- IPCT_NEW = (1 << IPCT_NEW_BIT),
-
- /* Expected connection */
- IPCT_RELATED_BIT = 1,
- IPCT_RELATED = (1 << IPCT_RELATED_BIT),
-
- /* Destroyed conntrack */
- IPCT_DESTROY_BIT = 2,
- IPCT_DESTROY = (1 << IPCT_DESTROY_BIT),
-
- /* Status has changed */
- IPCT_STATUS_BIT = 3,
- IPCT_STATUS = (1 << IPCT_STATUS_BIT),
+ IPCT_NEW = 0, /* new conntrack */
+ IPCT_RELATED = 1, /* related conntrack */
+ IPCT_DESTROY = 2, /* destroyed conntrack */
+ IPCT_STATUS = 3, /* status has changed */
+ IPCT_PROTOINFO = 4, /* protocol information has changed */
+ IPCT_HELPER = 5, /* new helper has been set */
+ IPCT_MARK = 6, /* new mark has been set */
+ IPCT_NATSEQADJ = 7, /* NAT is doing sequence adjustment */
+ IPCT_SECMARK = 8, /* new security mark has been set */
+};
- /* Update of protocol info */
- IPCT_PROTOINFO_BIT = 4,
- IPCT_PROTOINFO = (1 << IPCT_PROTOINFO_BIT),
+enum ip_conntrack_expect_events {
+ IPEXP_NEW = 0, /* new expectation */
+};
- /* New helper for conntrack */
- IPCT_HELPER_BIT = 5,
- IPCT_HELPER = (1 << IPCT_HELPER_BIT),
+struct nf_conntrack_ecache {
+ unsigned long cache; /* bitops want long */
+};
- /* Mark is set */
- IPCT_MARK_BIT = 6,
- IPCT_MARK = (1 << IPCT_MARK_BIT),
+static inline struct nf_conntrack_ecache *
+nf_ct_ecache_find(const struct nf_conn *ct)
+{
+ return nf_ct_ext_find(ct, NF_CT_EXT_ECACHE);
+}
- /* NAT sequence adjustment */
- IPCT_NATSEQADJ_BIT = 7,
- IPCT_NATSEQADJ = (1 << IPCT_NATSEQADJ_BIT),
+static inline struct nf_conntrack_ecache *
+nf_ct_ecache_ext_add(struct nf_conn *ct, gfp_t gfp)
+{
+ struct net *net = nf_ct_net(ct);
- /* Secmark is set */
- IPCT_SECMARK_BIT = 8,
- IPCT_SECMARK = (1 << IPCT_SECMARK_BIT),
-};
+ if (!net->ct.sysctl_events)
+ return NULL;
-enum ip_conntrack_expect_events {
- IPEXP_NEW_BIT = 0,
- IPEXP_NEW = (1 << IPEXP_NEW_BIT),
+ return nf_ct_ext_add(ct, NF_CT_EXT_ECACHE, gfp);
};
#ifdef CONFIG_NF_CONNTRACK_EVENTS
-struct nf_conntrack_ecache {
- struct nf_conn *ct;
- unsigned int events;
-};
-
/* This structure is passed to event handler */
struct nf_ct_event {
struct nf_conn *ct;
extern int nf_conntrack_register_notifier(struct nf_ct_event_notifier *nb);
extern void nf_conntrack_unregister_notifier(struct nf_ct_event_notifier *nb);
-extern void nf_ct_deliver_cached_events(const struct nf_conn *ct);
-extern void __nf_ct_event_cache_init(struct nf_conn *ct);
-extern void nf_ct_event_cache_flush(struct net *net);
+extern void nf_ct_deliver_cached_events(struct nf_conn *ct);
static inline void
nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct)
{
- struct net *net = nf_ct_net(ct);
- struct nf_conntrack_ecache *ecache;
-
- local_bh_disable();
- ecache = per_cpu_ptr(net->ct.ecache, raw_smp_processor_id());
- if (ct != ecache->ct)
- __nf_ct_event_cache_init(ct);
- ecache->events |= event;
- local_bh_enable();
+ struct nf_conntrack_ecache *e;
+
+ if (nf_conntrack_event_cb == NULL)
+ return;
+
+ e = nf_ct_ecache_find(ct);
+ if (e == NULL)
+ return;
+
+ set_bit(event, &e->cache);
}
static inline void
-nf_conntrack_event_report(enum ip_conntrack_events event,
- struct nf_conn *ct,
- u32 pid,
- int report)
+nf_conntrack_eventmask_report(unsigned int eventmask,
+ struct nf_conn *ct,
+ u32 pid,
+ int report)
{
+ struct net *net = nf_ct_net(ct);
struct nf_ct_event_notifier *notify;
rcu_read_lock();
if (notify == NULL)
goto out_unlock;
+ if (!net->ct.sysctl_events)
+ goto out_unlock;
+
if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct)) {
struct nf_ct_event item = {
.ct = ct,
.pid = pid,
.report = report
};
- notify->fcn(event, &item);
+ notify->fcn(eventmask, &item);
}
out_unlock:
rcu_read_unlock();
}
+static inline void
+nf_conntrack_event_report(enum ip_conntrack_events event, struct nf_conn *ct,
+ u32 pid, int report)
+{
+ nf_conntrack_eventmask_report(1 << event, ct, pid, report);
+}
+
static inline void
nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct)
{
- nf_conntrack_event_report(event, ct, 0, 0);
+ nf_conntrack_eventmask_report(1 << event, ct, 0, 0);
}
struct nf_exp_event {
u32 pid,
int report)
{
+ struct net *net = nf_ct_exp_net(exp);
struct nf_exp_event_notifier *notify;
rcu_read_lock();
if (notify == NULL)
goto out_unlock;
+ if (!net->ct.sysctl_events)
+ goto out_unlock;
+
{
struct nf_exp_event item = {
.exp = exp,
.pid = pid,
.report = report
};
- notify->fcn(event, &item);
+ notify->fcn(1 << event, &item);
}
out_unlock:
rcu_read_unlock();
static inline void nf_conntrack_event_cache(enum ip_conntrack_events event,
struct nf_conn *ct) {}
+static inline void nf_conntrack_eventmask_report(unsigned int eventmask,
+ struct nf_conn *ct,
+ u32 pid,
+ int report) {}
static inline void nf_conntrack_event(enum ip_conntrack_events event,
struct nf_conn *ct) {}
static inline void nf_conntrack_event_report(enum ip_conntrack_events event,
struct nf_conntrack_expect *exp,
u32 pid,
int report) {}
-static inline void nf_ct_event_cache_flush(struct net *net) {}
static inline int nf_conntrack_ecache_init(struct net *net)
{
NF_CT_EXT_HELPER,
NF_CT_EXT_NAT,
NF_CT_EXT_ACCT,
+ NF_CT_EXT_ECACHE,
NF_CT_EXT_NUM,
};
#define NF_CT_EXT_HELPER_TYPE struct nf_conn_help
#define NF_CT_EXT_NAT_TYPE struct nf_conn_nat
#define NF_CT_EXT_ACCT_TYPE struct nf_conn_counter
+#define NF_CT_EXT_ECACHE_TYPE struct nf_conntrack_ecache
/* Extensions: optional stuff which isn't permanently in struct. */
struct nf_ct_ext {
struct hlist_head *expect_hash;
struct hlist_nulls_head unconfirmed;
struct ip_conntrack_stat *stat;
-#ifdef CONFIG_NF_CONNTRACK_EVENTS
- struct nf_conntrack_ecache *ecache;
-#endif
+ int sysctl_events;
int sysctl_acct;
int sysctl_checksum;
unsigned int sysctl_log_invalid; /* Log invalid packets */
#ifdef CONFIG_SYSCTL
struct ctl_table_header *sysctl_header;
struct ctl_table_header *acct_sysctl_header;
+ struct ctl_table_header *event_sysctl_header;
#endif
int hash_vmalloc;
int expect_vmalloc;
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_extend.h>
#include <net/netfilter/nf_conntrack_acct.h>
+#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_core.h>
}
nf_ct_acct_ext_add(ct, GFP_ATOMIC);
+ nf_ct_ecache_ext_add(ct, GFP_ATOMIC);
spin_lock_bh(&nf_conntrack_lock);
exp = nf_ct_find_expectation(net, tuple);
static void nf_conntrack_cleanup_net(struct net *net)
{
- nf_ct_event_cache_flush(net);
- nf_conntrack_ecache_fini(net);
i_see_dead_people:
nf_ct_iterate_cleanup(net, kill_all, NULL);
if (atomic_read(&net->ct.count) != 0) {
nf_ct_free_hashtable(net->ct.hash, net->ct.hash_vmalloc,
nf_conntrack_htable_size);
+ nf_conntrack_ecache_fini(net);
nf_conntrack_acct_fini(net);
nf_conntrack_expect_fini(net);
free_percpu(net->ct.stat);
ret = -ENOMEM;
goto err_stat;
}
- ret = nf_conntrack_ecache_init(net);
- if (ret < 0)
- goto err_ecache;
net->ct.hash = nf_ct_alloc_hashtable(&nf_conntrack_htable_size,
&net->ct.hash_vmalloc, 1);
if (!net->ct.hash) {
ret = nf_conntrack_acct_init(net);
if (ret < 0)
goto err_acct;
+ ret = nf_conntrack_ecache_init(net);
+ if (ret < 0)
+ goto err_ecache;
/* Set up fake conntrack:
- to never be deleted, not in any hashes */
return 0;
+err_ecache:
+ nf_conntrack_acct_fini(net);
err_acct:
nf_conntrack_expect_fini(net);
err_expect:
nf_ct_free_hashtable(net->ct.hash, net->ct.hash_vmalloc,
nf_conntrack_htable_size);
err_hash:
- nf_conntrack_ecache_fini(net);
-err_ecache:
free_percpu(net->ct.stat);
err_stat:
return ret;
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
+#include <net/netfilter/nf_conntrack_extend.h>
static DEFINE_MUTEX(nf_ct_ecache_mutex);
/* deliver cached events and clear cache entry - must be called with locally
* disabled softirqs */
-static inline void
-__nf_ct_deliver_cached_events(struct nf_conntrack_ecache *ecache)
+void nf_ct_deliver_cached_events(struct nf_conn *ct)
{
+ unsigned long events;
struct nf_ct_event_notifier *notify;
+ struct nf_conntrack_ecache *e;
rcu_read_lock();
notify = rcu_dereference(nf_conntrack_event_cb);
if (notify == NULL)
goto out_unlock;
- if (nf_ct_is_confirmed(ecache->ct) && !nf_ct_is_dying(ecache->ct)
- && ecache->events) {
+ e = nf_ct_ecache_find(ct);
+ if (e == NULL)
+ goto out_unlock;
+
+ events = xchg(&e->cache, 0);
+
+ if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct) && events) {
struct nf_ct_event item = {
- .ct = ecache->ct,
+ .ct = ct,
.pid = 0,
.report = 0
};
- notify->fcn(ecache->events, &item);
+ notify->fcn(events, &item);
}
- ecache->events = 0;
- nf_ct_put(ecache->ct);
- ecache->ct = NULL;
-
out_unlock:
rcu_read_unlock();
}
-
-/* Deliver all cached events for a particular conntrack. This is called
- * by code prior to async packet handling for freeing the skb */
-void nf_ct_deliver_cached_events(const struct nf_conn *ct)
-{
- struct net *net = nf_ct_net(ct);
- struct nf_conntrack_ecache *ecache;
-
- local_bh_disable();
- ecache = per_cpu_ptr(net->ct.ecache, raw_smp_processor_id());
- if (ecache->ct == ct)
- __nf_ct_deliver_cached_events(ecache);
- local_bh_enable();
-}
EXPORT_SYMBOL_GPL(nf_ct_deliver_cached_events);
-/* Deliver cached events for old pending events, if current conntrack != old */
-void __nf_ct_event_cache_init(struct nf_conn *ct)
-{
- struct net *net = nf_ct_net(ct);
- struct nf_conntrack_ecache *ecache;
-
- /* take care of delivering potentially old events */
- ecache = per_cpu_ptr(net->ct.ecache, raw_smp_processor_id());
- BUG_ON(ecache->ct == ct);
- if (ecache->ct)
- __nf_ct_deliver_cached_events(ecache);
- /* initialize for this conntrack/packet */
- ecache->ct = ct;
- nf_conntrack_get(&ct->ct_general);
-}
-EXPORT_SYMBOL_GPL(__nf_ct_event_cache_init);
-
-/* flush the event cache - touches other CPU's data and must not be called
- * while packets are still passing through the code */
-void nf_ct_event_cache_flush(struct net *net)
-{
- struct nf_conntrack_ecache *ecache;
- int cpu;
-
- for_each_possible_cpu(cpu) {
- ecache = per_cpu_ptr(net->ct.ecache, cpu);
- if (ecache->ct)
- nf_ct_put(ecache->ct);
- }
-}
-
-int nf_conntrack_ecache_init(struct net *net)
-{
- net->ct.ecache = alloc_percpu(struct nf_conntrack_ecache);
- if (!net->ct.ecache)
- return -ENOMEM;
- return 0;
-}
-
-void nf_conntrack_ecache_fini(struct net *net)
-{
- free_percpu(net->ct.ecache);
-}
-
int nf_conntrack_register_notifier(struct nf_ct_event_notifier *new)
{
int ret = 0;
mutex_unlock(&nf_ct_ecache_mutex);
}
EXPORT_SYMBOL_GPL(nf_ct_expect_unregister_notifier);
+
+#define NF_CT_EVENTS_DEFAULT 1
+static int nf_ct_events __read_mostly = NF_CT_EVENTS_DEFAULT;
+
+#ifdef CONFIG_SYSCTL
+static struct ctl_table event_sysctl_table[] = {
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "nf_conntrack_events",
+ .data = &init_net.ct.sysctl_events,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {}
+};
+#endif /* CONFIG_SYSCTL */
+
+static struct nf_ct_ext_type event_extend __read_mostly = {
+ .len = sizeof(struct nf_conntrack_ecache),
+ .align = __alignof__(struct nf_conntrack_ecache),
+ .id = NF_CT_EXT_ECACHE,
+};
+
+#ifdef CONFIG_SYSCTL
+static int nf_conntrack_event_init_sysctl(struct net *net)
+{
+ struct ctl_table *table;
+
+ table = kmemdup(event_sysctl_table, sizeof(event_sysctl_table),
+ GFP_KERNEL);
+ if (!table)
+ goto out;
+
+ table[0].data = &net->ct.sysctl_events;
+
+ net->ct.event_sysctl_header =
+ register_net_sysctl_table(net,
+ nf_net_netfilter_sysctl_path, table);
+ if (!net->ct.event_sysctl_header) {
+ printk(KERN_ERR "nf_ct_event: can't register to sysctl.\n");
+ goto out_register;
+ }
+ return 0;
+
+out_register:
+ kfree(table);
+out:
+ return -ENOMEM;
+}
+
+static void nf_conntrack_event_fini_sysctl(struct net *net)
+{
+ struct ctl_table *table;
+
+ table = net->ct.event_sysctl_header->ctl_table_arg;
+ unregister_net_sysctl_table(net->ct.event_sysctl_header);
+ kfree(table);
+}
+#else
+static int nf_conntrack_event_init_sysctl(struct net *net)
+{
+ return 0;
+}
+
+static void nf_conntrack_event_fini_sysctl(struct net *net)
+{
+}
+#endif /* CONFIG_SYSCTL */
+
+int nf_conntrack_ecache_init(struct net *net)
+{
+ int ret;
+
+ net->ct.sysctl_events = nf_ct_events;
+
+ if (net_eq(net, &init_net)) {
+ ret = nf_ct_extend_register(&event_extend);
+ if (ret < 0) {
+ printk(KERN_ERR "nf_ct_event: Unable to register "
+ "event extension.\n");
+ goto out_extend_register;
+ }
+ }
+
+ ret = nf_conntrack_event_init_sysctl(net);
+ if (ret < 0)
+ goto out_sysctl;
+
+ return 0;
+
+out_sysctl:
+ if (net_eq(net, &init_net))
+ nf_ct_extend_unregister(&event_extend);
+out_extend_register:
+ return ret;
+}
+
+void nf_conntrack_ecache_fini(struct net *net)
+{
+ nf_conntrack_event_fini_sysctl(net);
+ if (net_eq(net, &init_net))
+ nf_ct_extend_unregister(&event_extend);
+}
if (ct == &nf_conntrack_untracked)
return 0;
- if (events & IPCT_DESTROY) {
+ if (events & (1 << IPCT_DESTROY)) {
type = IPCTNL_MSG_CT_DELETE;
group = NFNLGRP_CONNTRACK_DESTROY;
- } else if (events & (IPCT_NEW | IPCT_RELATED)) {
+ } else if (events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED))) {
type = IPCTNL_MSG_CT_NEW;
flags = NLM_F_CREATE|NLM_F_EXCL;
group = NFNLGRP_CONNTRACK_NEW;
if (ctnetlink_dump_status(skb, ct) < 0)
goto nla_put_failure;
- if (events & IPCT_DESTROY) {
+ if (events & (1 << IPCT_DESTROY)) {
if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 ||
ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0)
goto nla_put_failure;
if (ctnetlink_dump_timeout(skb, ct) < 0)
goto nla_put_failure;
- if (events & IPCT_PROTOINFO
+ if (events & (1 << IPCT_PROTOINFO)
&& ctnetlink_dump_protoinfo(skb, ct) < 0)
goto nla_put_failure;
- if ((events & IPCT_HELPER || nfct_help(ct))
+ if ((events & (1 << IPCT_HELPER) || nfct_help(ct))
&& ctnetlink_dump_helpinfo(skb, ct) < 0)
goto nla_put_failure;
#ifdef CONFIG_NF_CONNTRACK_SECMARK
- if ((events & IPCT_SECMARK || ct->secmark)
+ if ((events & (1 << IPCT_SECMARK) || ct->secmark)
&& ctnetlink_dump_secmark(skb, ct) < 0)
goto nla_put_failure;
#endif
- if (events & IPCT_RELATED &&
+ if (events & (1 << IPCT_RELATED) &&
ctnetlink_dump_master(skb, ct) < 0)
goto nla_put_failure;
- if (events & IPCT_NATSEQADJ &&
+ if (events & (1 << IPCT_NATSEQADJ) &&
ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
goto nla_put_failure;
}
#ifdef CONFIG_NF_CONNTRACK_MARK
- if ((events & IPCT_MARK || ct->mark)
+ if ((events & (1 << IPCT_MARK) || ct->mark)
&& ctnetlink_dump_mark(skb, ct) < 0)
goto nla_put_failure;
#endif
}
nf_ct_acct_ext_add(ct, GFP_ATOMIC);
+ nf_ct_ecache_ext_add(ct, GFP_ATOMIC);
#if defined(CONFIG_NF_CONNTRACK_MARK)
if (cda[CTA_MARK])
else
events = IPCT_NEW;
- nf_conntrack_event_report(IPCT_STATUS |
- IPCT_HELPER |
- IPCT_PROTOINFO |
- IPCT_NATSEQADJ |
- IPCT_MARK | events,
- ct, NETLINK_CB(skb).pid,
- nlmsg_report(nlh));
+ nf_conntrack_eventmask_report((1 << IPCT_STATUS) |
+ (1 << IPCT_HELPER) |
+ (1 << IPCT_PROTOINFO) |
+ (1 << IPCT_NATSEQADJ) |
+ (1 << IPCT_MARK) | events,
+ ct, NETLINK_CB(skb).pid,
+ nlmsg_report(nlh));
nf_ct_put(ct);
} else
spin_unlock_bh(&nf_conntrack_lock);
if (err == 0) {
nf_conntrack_get(&ct->ct_general);
spin_unlock_bh(&nf_conntrack_lock);
- nf_conntrack_event_report(IPCT_STATUS |
- IPCT_HELPER |
- IPCT_PROTOINFO |
- IPCT_NATSEQADJ |
- IPCT_MARK,
- ct, NETLINK_CB(skb).pid,
- nlmsg_report(nlh));
+ nf_conntrack_eventmask_report((1 << IPCT_STATUS) |
+ (1 << IPCT_HELPER) |
+ (1 << IPCT_PROTOINFO) |
+ (1 << IPCT_NATSEQADJ) |
+ (1 << IPCT_MARK),
+ ct, NETLINK_CB(skb).pid,
+ nlmsg_report(nlh));
nf_ct_put(ct);
} else
spin_unlock_bh(&nf_conntrack_lock);
unsigned int type;
int flags = 0;
- if (events & IPEXP_NEW) {
+ if (events & (1 << IPEXP_NEW)) {
type = IPCTNL_MSG_EXP_NEW;
flags = NLM_F_CREATE|NLM_F_EXCL;
} else
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff