diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/rhashtable.h | 70 | ||||
| -rw-r--r-- | include/net/netfilter/nf_conntrack.h | 56 | ||||
| -rw-r--r-- | include/net/netfilter/nf_conntrack_core.h | 3 | ||||
| -rw-r--r-- | include/net/netfilter/nf_conntrack_ecache.h | 17 | ||||
| -rw-r--r-- | include/net/netfilter/nf_conntrack_l4proto.h | 8 | ||||
| -rw-r--r-- | include/net/netfilter/nf_log.h | 3 | ||||
| -rw-r--r-- | include/net/netfilter/nf_tables.h | 3 | ||||
| -rw-r--r-- | include/net/netns/conntrack.h | 8 | ||||
| -rw-r--r-- | include/uapi/linux/netfilter/nf_tables.h | 65 |
9 files changed, 177 insertions, 56 deletions
diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h index 8b72ee7..fd82584 100644 --- a/include/linux/rhashtable.h +++ b/include/linux/rhashtable.h @@ -343,7 +343,8 @@ int rhashtable_init(struct rhashtable *ht, struct bucket_table *rhashtable_insert_slow(struct rhashtable *ht, const void *key, struct rhash_head *obj, - struct bucket_table *old_tbl); + struct bucket_table *old_tbl, + void **data); int rhashtable_insert_rehash(struct rhashtable *ht, struct bucket_table *tbl); void rhashtable_walk_enter(struct rhashtable *ht, @@ -563,8 +564,11 @@ restart: return NULL; } -/* Internal function, please use rhashtable_insert_fast() instead */ -static inline int __rhashtable_insert_fast( +/* Internal function, please use rhashtable_insert_fast() instead. This + * function returns the existing element already in hashes in there is a clash, + * otherwise it returns an error via ERR_PTR(). + */ +static inline void *__rhashtable_insert_fast( struct rhashtable *ht, const void *key, struct rhash_head *obj, const struct rhashtable_params params) { @@ -577,6 +581,7 @@ static inline int __rhashtable_insert_fast( spinlock_t *lock; unsigned int elasticity; unsigned int hash; + void *data = NULL; int err; restart: @@ -601,11 +606,14 @@ restart: new_tbl = rht_dereference_rcu(tbl->future_tbl, ht); if (unlikely(new_tbl)) { - tbl = rhashtable_insert_slow(ht, key, obj, new_tbl); + tbl = rhashtable_insert_slow(ht, key, obj, new_tbl, &data); if (!IS_ERR_OR_NULL(tbl)) goto slow_path; err = PTR_ERR(tbl); + if (err == -EEXIST) + err = 0; + goto out; } @@ -619,25 +627,25 @@ slow_path: err = rhashtable_insert_rehash(ht, tbl); rcu_read_unlock(); if (err) - return err; + return ERR_PTR(err); goto restart; } - err = -EEXIST; + err = 0; elasticity = ht->elasticity; rht_for_each(head, tbl, hash) { if (key && unlikely(!(params.obj_cmpfn ? params.obj_cmpfn(&arg, rht_obj(ht, head)) : - rhashtable_compare(&arg, rht_obj(ht, head))))) + rhashtable_compare(&arg, rht_obj(ht, head))))) { + data = rht_obj(ht, head); goto out; + } if (!--elasticity) goto slow_path; } - err = 0; - head = rht_dereference_bucket(tbl->buckets[hash], tbl, hash); RCU_INIT_POINTER(obj->next, head); @@ -652,7 +660,7 @@ out: spin_unlock_bh(lock); rcu_read_unlock(); - return err; + return err ? ERR_PTR(err) : data; } /** @@ -675,7 +683,13 @@ static inline int rhashtable_insert_fast( struct rhashtable *ht, struct rhash_head *obj, const struct rhashtable_params params) { - return __rhashtable_insert_fast(ht, NULL, obj, params); + void *ret; + + ret = __rhashtable_insert_fast(ht, NULL, obj, params); + if (IS_ERR(ret)) + return PTR_ERR(ret); + + return ret == NULL ? 0 : -EEXIST; } /** @@ -704,11 +718,15 @@ static inline int rhashtable_lookup_insert_fast( const struct rhashtable_params params) { const char *key = rht_obj(ht, obj); + void *ret; BUG_ON(ht->p.obj_hashfn); - return __rhashtable_insert_fast(ht, key + ht->p.key_offset, obj, - params); + ret = __rhashtable_insert_fast(ht, key + ht->p.key_offset, obj, params); + if (IS_ERR(ret)) + return PTR_ERR(ret); + + return ret == NULL ? 0 : -EEXIST; } /** @@ -737,6 +755,32 @@ static inline int rhashtable_lookup_insert_key( struct rhashtable *ht, const void *key, struct rhash_head *obj, const struct rhashtable_params params) { + void *ret; + + BUG_ON(!ht->p.obj_hashfn || !key); + + ret = __rhashtable_insert_fast(ht, key, obj, params); + if (IS_ERR(ret)) + return PTR_ERR(ret); + + return ret == NULL ? 0 : -EEXIST; +} + +/** + * rhashtable_lookup_get_insert_key - lookup and insert object into hash table + * @ht: hash table + * @obj: pointer to hash head inside object + * @params: hash table parameters + * @data: pointer to element data already in hashes + * + * Just like rhashtable_lookup_insert_key(), but this function returns the + * object if it exists, NULL if it does not and the insertion was successful, + * and an ERR_PTR otherwise. + */ +static inline void *rhashtable_lookup_get_insert_key( + struct rhashtable *ht, const void *key, struct rhash_head *obj, + const struct rhashtable_params params) +{ BUG_ON(!ht->p.obj_hashfn || !key); return __rhashtable_insert_fast(ht, key, obj, params); diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h index 445b019..5041805 100644 --- a/include/net/netfilter/nf_conntrack.h +++ b/include/net/netfilter/nf_conntrack.h @@ -42,7 +42,6 @@ union nf_conntrack_expect_proto { #include <linux/types.h> #include <linux/skbuff.h> -#include <linux/timer.h> #ifdef CONFIG_NETFILTER_DEBUG #define NF_CT_ASSERT(x) WARN_ON(!(x)) @@ -73,7 +72,7 @@ struct nf_conn_help { #include <net/netfilter/ipv6/nf_conntrack_ipv6.h> struct nf_conn { - /* Usage count in here is 1 for hash table/destruct timer, 1 per skb, + /* Usage count in here is 1 for hash table, 1 per skb, * plus 1 for any connection(s) we are `master' for * * Hint, SKB address this struct and refcnt via skb->nfct and @@ -96,8 +95,8 @@ struct nf_conn { /* Have we seen traffic both ways yet? (bitset) */ unsigned long status; - /* Timer function; drops refcnt when it goes off. */ - struct timer_list timeout; + /* jiffies32 when this ct is considered dead */ + u32 timeout; possible_net_t ct_net; @@ -220,21 +219,14 @@ static inline void nf_ct_refresh(struct nf_conn *ct, __nf_ct_refresh_acct(ct, 0, skb, extra_jiffies, 0); } -bool __nf_ct_kill_acct(struct nf_conn *ct, enum ip_conntrack_info ctinfo, - const struct sk_buff *skb, int do_acct); - /* kill conntrack and do accounting */ -static inline bool nf_ct_kill_acct(struct nf_conn *ct, - enum ip_conntrack_info ctinfo, - const struct sk_buff *skb) -{ - return __nf_ct_kill_acct(ct, ctinfo, skb, 1); -} +bool nf_ct_kill_acct(struct nf_conn *ct, enum ip_conntrack_info ctinfo, + const struct sk_buff *skb); /* kill conntrack without accounting */ static inline bool nf_ct_kill(struct nf_conn *ct) { - return __nf_ct_kill_acct(ct, 0, NULL, 0); + return nf_ct_delete(ct, 0, 0); } /* These are for NAT. Icky. */ @@ -291,21 +283,55 @@ static inline bool nf_is_loopback_packet(const struct sk_buff *skb) return skb->dev && skb->skb_iif && skb->dev->flags & IFF_LOOPBACK; } +#define nfct_time_stamp ((u32)(jiffies)) + /* jiffies until ct expires, 0 if already expired */ static inline unsigned long nf_ct_expires(const struct nf_conn *ct) { - long timeout = (long)ct->timeout.expires - (long)jiffies; + s32 timeout = ct->timeout - nfct_time_stamp; return timeout > 0 ? timeout : 0; } +static inline bool nf_ct_is_expired(const struct nf_conn *ct) +{ + return (__s32)(ct->timeout - nfct_time_stamp) <= 0; +} + +/* use after obtaining a reference count */ +static inline bool nf_ct_should_gc(const struct nf_conn *ct) +{ + return nf_ct_is_expired(ct) && nf_ct_is_confirmed(ct) && + !nf_ct_is_dying(ct); +} + struct kernel_param; int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp); int nf_conntrack_hash_resize(unsigned int hashsize); + +extern struct hlist_nulls_head *nf_conntrack_hash; extern unsigned int nf_conntrack_htable_size; +extern seqcount_t nf_conntrack_generation; extern unsigned int nf_conntrack_max; +/* must be called with rcu read lock held */ +static inline void +nf_conntrack_get_ht(struct hlist_nulls_head **hash, unsigned int *hsize) +{ + struct hlist_nulls_head *hptr; + unsigned int sequence, hsz; + + do { + sequence = read_seqcount_begin(&nf_conntrack_generation); + hsz = nf_conntrack_htable_size; + hptr = nf_conntrack_hash; + } while (read_seqcount_retry(&nf_conntrack_generation, sequence)); + + *hash = hptr; + *hsize = hsz; +} + struct nf_conn *nf_ct_tmpl_alloc(struct net *net, const struct nf_conntrack_zone *zone, gfp_t flags); diff --git a/include/net/netfilter/nf_conntrack_core.h b/include/net/netfilter/nf_conntrack_core.h index 79d7ac5..62e17d1 100644 --- a/include/net/netfilter/nf_conntrack_core.h +++ b/include/net/netfilter/nf_conntrack_core.h @@ -51,8 +51,6 @@ bool nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse, const struct nf_conntrack_l3proto *l3proto, const struct nf_conntrack_l4proto *l4proto); -void nf_conntrack_get_ht(struct hlist_nulls_head **hash, unsigned int *hsize); - /* Find a connection corresponding to a tuple. */ struct nf_conntrack_tuple_hash * nf_conntrack_find_get(struct net *net, @@ -83,7 +81,6 @@ print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple, #define CONNTRACK_LOCKS 1024 -extern struct hlist_nulls_head *nf_conntrack_hash; extern spinlock_t nf_conntrack_locks[CONNTRACK_LOCKS]; void nf_conntrack_lock(spinlock_t *lock); diff --git a/include/net/netfilter/nf_conntrack_ecache.h b/include/net/netfilter/nf_conntrack_ecache.h index fa36447..12d967b 100644 --- a/include/net/netfilter/nf_conntrack_ecache.h +++ b/include/net/netfilter/nf_conntrack_ecache.h @@ -12,12 +12,19 @@ #include <linux/netfilter/nf_conntrack_tuple_common.h> #include <net/netfilter/nf_conntrack_extend.h> +enum nf_ct_ecache_state { + NFCT_ECACHE_UNKNOWN, /* destroy event not sent */ + NFCT_ECACHE_DESTROY_FAIL, /* tried but failed to send destroy event */ + NFCT_ECACHE_DESTROY_SENT, /* sent destroy event after failure */ +}; + struct nf_conntrack_ecache { - unsigned long cache; /* bitops want long */ - unsigned long missed; /* missed events */ - u16 ctmask; /* bitmask of ct events to be delivered */ - u16 expmask; /* bitmask of expect events to be delivered */ - u32 portid; /* netlink portid of destroyer */ + unsigned long cache; /* bitops want long */ + unsigned long missed; /* missed events */ + u16 ctmask; /* bitmask of ct events to be delivered */ + u16 expmask; /* bitmask of expect events to be delivered */ + u32 portid; /* netlink portid of destroyer */ + enum nf_ct_ecache_state state; /* ecache state */ }; static inline struct nf_conntrack_ecache * diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h index 1a5fb36..de629f1 100644 --- a/include/net/netfilter/nf_conntrack_l4proto.h +++ b/include/net/netfilter/nf_conntrack_l4proto.h @@ -134,14 +134,6 @@ void nf_ct_l4proto_pernet_unregister(struct net *net, int nf_ct_l4proto_register(struct nf_conntrack_l4proto *proto); void nf_ct_l4proto_unregister(struct nf_conntrack_l4proto *proto); -static inline void nf_ct_kfree_compat_sysctl_table(struct nf_proto_net *pn) -{ -#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) - kfree(pn->ctl_compat_table); - pn->ctl_compat_table = NULL; -#endif -} - /* Generic netlink helpers */ int nf_ct_port_tuple_to_nlattr(struct sk_buff *skb, const struct nf_conntrack_tuple *tuple); diff --git a/include/net/netfilter/nf_log.h b/include/net/netfilter/nf_log.h index 83d855b..ee07dc8 100644 --- a/include/net/netfilter/nf_log.h +++ b/include/net/netfilter/nf_log.h @@ -60,8 +60,7 @@ struct nf_logger { int nf_log_register(u_int8_t pf, struct nf_logger *logger); void nf_log_unregister(struct nf_logger *logger); -void nf_log_set(struct net *net, u_int8_t pf, - const struct nf_logger *logger); +int nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger); void nf_log_unset(struct net *net, const struct nf_logger *logger); int nf_log_bind_pf(struct net *net, u_int8_t pf, diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h index f2f1339..8972468 100644 --- a/include/net/netfilter/nf_tables.h +++ b/include/net/netfilter/nf_tables.h @@ -251,7 +251,8 @@ struct nft_set_ops { int (*insert)(const struct net *net, const struct nft_set *set, - const struct nft_set_elem *elem); + const struct nft_set_elem *elem, + struct nft_set_ext **ext); void (*activate)(const struct net *net, const struct nft_set *set, const struct nft_set_elem *elem); diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h index 38b1a80..e469e85 100644 --- a/include/net/netns/conntrack.h +++ b/include/net/netns/conntrack.h @@ -15,10 +15,6 @@ struct nf_proto_net { #ifdef CONFIG_SYSCTL struct ctl_table_header *ctl_table_header; struct ctl_table *ctl_table; -#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT - struct ctl_table_header *ctl_compat_header; - struct ctl_table *ctl_compat_table; -#endif #endif unsigned int users; }; @@ -58,10 +54,6 @@ struct nf_ip_net { struct nf_udp_net udp; struct nf_icmp_net icmp; struct nf_icmp_net icmpv6; -#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) - struct ctl_table_header *ctl_table_header; - struct ctl_table *ctl_table; -#endif }; struct ct_pcpu { diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h index c674ba2..28ce01d 100644 --- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -724,6 +724,26 @@ enum nft_meta_keys { }; /** + * enum nft_hash_attributes - nf_tables hash expression netlink attributes + * + * @NFTA_HASH_SREG: source register (NLA_U32) + * @NFTA_HASH_DREG: destination register (NLA_U32) + * @NFTA_HASH_LEN: source data length (NLA_U32) + * @NFTA_HASH_MODULUS: modulus value (NLA_U32) + * @NFTA_HASH_SEED: seed value (NLA_U32) + */ +enum nft_hash_attributes { + NFTA_HASH_UNSPEC, + NFTA_HASH_SREG, + NFTA_HASH_DREG, + NFTA_HASH_LEN, + NFTA_HASH_MODULUS, + NFTA_HASH_SEED, + __NFTA_HASH_MAX, +}; +#define NFTA_HASH_MAX (__NFTA_HASH_MAX - 1) + +/** * enum nft_meta_attributes - nf_tables meta expression netlink attributes * * @NFTA_META_DREG: destination register (NLA_U32) @@ -880,6 +900,25 @@ enum nft_queue_attributes { #define NFT_QUEUE_FLAG_CPU_FANOUT 0x02 /* use current CPU (no hashing) */ #define NFT_QUEUE_FLAG_MASK 0x03 +enum nft_quota_flags { + NFT_QUOTA_F_INV = (1 << 0), +}; + +/** + * enum nft_quota_attributes - nf_tables quota expression netlink attributes + * + * @NFTA_QUOTA_BYTES: quota in bytes (NLA_U16) + * @NFTA_QUOTA_FLAGS: flags (NLA_U32) + */ +enum nft_quota_attributes { + NFTA_QUOTA_UNSPEC, + NFTA_QUOTA_BYTES, + NFTA_QUOTA_FLAGS, + NFTA_QUOTA_PAD, + __NFTA_QUOTA_MAX +}; +#define NFTA_QUOTA_MAX (__NFTA_QUOTA_MAX - 1) + /** * enum nft_reject_types - nf_tables reject expression reject types * @@ -1051,7 +1090,7 @@ enum nft_gen_attributes { * @NFTA_TRACE_NFPROTO: nf protocol processed (NLA_U32) * @NFTA_TRACE_POLICY: policy that decided fate of packet (NLA_U32) */ -enum nft_trace_attibutes { +enum nft_trace_attributes { NFTA_TRACE_UNSPEC, NFTA_TRACE_TABLE, NFTA_TRACE_CHAIN, @@ -1082,4 +1121,28 @@ enum nft_trace_types { __NFT_TRACETYPE_MAX }; #define NFT_TRACETYPE_MAX (__NFT_TRACETYPE_MAX - 1) + +/** + * enum nft_ng_attributes - nf_tables number generator expression netlink attributes + * + * @NFTA_NG_DREG: destination register (NLA_U32) + * @NFTA_NG_UNTIL: source value to increment the counter until reset (NLA_U32) + * @NFTA_NG_TYPE: operation type (NLA_U32) + */ +enum nft_ng_attributes { + NFTA_NG_UNSPEC, + NFTA_NG_DREG, + NFTA_NG_UNTIL, + NFTA_NG_TYPE, + __NFTA_NG_MAX +}; +#define NFTA_NG_MAX (__NFTA_NG_MAX - 1) + +enum nft_ng_types { + NFT_NG_INCREMENTAL, + NFT_NG_RANDOM, + __NFT_NG_MAX +}; +#define NFT_NG_MAX (__NFT_NG_MAX - 1) + #endif /* _LINUX_NF_TABLES_H */ |