diff options
-rw-r--r-- | Documentation/networking/nf_conntrack-sysctl.rst | 24 | ||||
-rw-r--r-- | include/net/netfilter/nf_conntrack_l4proto.h | 20 | ||||
-rw-r--r-- | include/net/netfilter/nf_tables_core.h | 1 | ||||
-rw-r--r-- | include/uapi/linux/netfilter/nf_tables.h | 15 | ||||
-rw-r--r-- | net/netfilter/Makefile | 2 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_proto.c | 16 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_proto_dccp.c | 14 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_proto_icmp.c | 7 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_proto_icmpv6.c | 3 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_proto_sctp.c | 2 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_proto_tcp.c | 23 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_proto_udp.c | 6 | ||||
-rw-r--r-- | net/netfilter/nf_tables_core.c | 1 | ||||
-rw-r--r-- | net/netfilter/nfnetlink_hook.c | 4 | ||||
-rw-r--r-- | net/netfilter/nft_exthdr.c | 7 | ||||
-rw-r--r-- | net/netfilter/nft_last.c | 87 |
16 files changed, 184 insertions, 48 deletions
diff --git a/Documentation/networking/nf_conntrack-sysctl.rst b/Documentation/networking/nf_conntrack-sysctl.rst index 11a9b76786cb..0467b30e4abe 100644 --- a/Documentation/networking/nf_conntrack-sysctl.rst +++ b/Documentation/networking/nf_conntrack-sysctl.rst @@ -177,3 +177,27 @@ nf_conntrack_gre_timeout_stream - INTEGER (seconds) This extended timeout will be used in case there is an GRE stream detected. + +nf_flowtable_tcp_timeout - INTEGER (seconds) + default 30 + + Control offload timeout for tcp connections. + TCP connections may be offloaded from nf conntrack to nf flow table. + Once aged, the connection is returned to nf conntrack with tcp pickup timeout. + +nf_flowtable_tcp_pickup - INTEGER (seconds) + default 120 + + TCP connection timeout after being aged from nf flow table offload. + +nf_flowtable_udp_timeout - INTEGER (seconds) + default 30 + + Control offload timeout for udp connections. + UDP connections may be offloaded from nf conntrack to nf flow table. + Once aged, the connection is returned to nf conntrack with udp pickup timeout. + +nf_flowtable_udp_pickup - INTEGER (seconds) + default 30 + + UDP connection timeout after being aged from nf flow table offload. diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h index 96f9cf81f46b..1f47bef51722 100644 --- a/include/net/netfilter/nf_conntrack_l4proto.h +++ b/include/net/netfilter/nf_conntrack_l4proto.h @@ -159,22 +159,26 @@ unsigned int nf_ct_port_nlattr_tuple_size(void); extern const struct nla_policy nf_ct_port_nla_policy[]; #ifdef CONFIG_SYSCTL -__printf(3, 4) __cold +__printf(4, 5) __cold void nf_ct_l4proto_log_invalid(const struct sk_buff *skb, const struct nf_conn *ct, + const struct nf_hook_state *state, const char *fmt, ...); -__printf(5, 6) __cold +__printf(4, 5) __cold void nf_l4proto_log_invalid(const struct sk_buff *skb, - struct net *net, - u16 pf, u8 protonum, + const struct nf_hook_state *state, + u8 protonum, const char *fmt, ...); #else -static inline __printf(5, 6) __cold -void nf_l4proto_log_invalid(const struct sk_buff *skb, struct net *net, - u16 pf, u8 protonum, const char *fmt, ...) {} -static inline __printf(3, 4) __cold +static inline __printf(4, 5) __cold +void nf_l4proto_log_invalid(const struct sk_buff *skb, + const struct nf_hook_state *state, + u8 protonum, + const char *fmt, ...) {} +static inline __printf(4, 5) __cold void nf_ct_l4proto_log_invalid(const struct sk_buff *skb, const struct nf_conn *ct, + const struct nf_hook_state *state, const char *fmt, ...) { } #endif /* CONFIG_SYSCTL */ diff --git a/include/net/netfilter/nf_tables_core.h b/include/net/netfilter/nf_tables_core.h index 46c8d5bb5d8d..0fa5a6d98a00 100644 --- a/include/net/netfilter/nf_tables_core.h +++ b/include/net/netfilter/nf_tables_core.h @@ -16,6 +16,7 @@ extern struct nft_expr_type nft_range_type; extern struct nft_expr_type nft_meta_type; extern struct nft_expr_type nft_rt_type; extern struct nft_expr_type nft_exthdr_type; +extern struct nft_expr_type nft_last_type; #ifdef CONFIG_NETWORK_SECMARK extern struct nft_object_type nft_secmark_obj_type; diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h index 19715e2679d1..e94d1fa554cb 100644 --- a/include/uapi/linux/netfilter/nf_tables.h +++ b/include/uapi/linux/netfilter/nf_tables.h @@ -1196,6 +1196,21 @@ enum nft_counter_attributes { #define NFTA_COUNTER_MAX (__NFTA_COUNTER_MAX - 1) /** + * enum nft_last_attributes - nf_tables last expression netlink attributes + * + * @NFTA_LAST_SET: last update has been set, zero means never updated (NLA_U32) + * @NFTA_LAST_MSECS: milliseconds since last update (NLA_U64) + */ +enum nft_last_attributes { + NFTA_LAST_UNSPEC, + NFTA_LAST_SET, + NFTA_LAST_MSECS, + NFTA_LAST_PAD, + __NFTA_LAST_MAX +}; +#define NFTA_LAST_MAX (__NFTA_LAST_MAX - 1) + +/** * enum nft_log_attributes - nf_tables log expression netlink attributes * * @NFTA_LOG_GROUP: netlink group to send messages to (NLA_U32) diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile index 87112dad1fd4..049890e00a3d 100644 --- a/net/netfilter/Makefile +++ b/net/netfilter/Makefile @@ -74,7 +74,7 @@ obj-$(CONFIG_NF_DUP_NETDEV) += nf_dup_netdev.o nf_tables-objs := nf_tables_core.o nf_tables_api.o nft_chain_filter.o \ nf_tables_trace.o nft_immediate.o nft_cmp.o nft_range.o \ nft_bitwise.o nft_byteorder.o nft_payload.o nft_lookup.o \ - nft_dynset.o nft_meta.o nft_rt.o nft_exthdr.o \ + nft_dynset.o nft_meta.o nft_rt.o nft_exthdr.o nft_last.o \ nft_chain_route.o nf_tables_offload.o \ nft_set_hash.o nft_set_bitmap.o nft_set_rbtree.o \ nft_set_pipapo.o diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c index be14e0bea4c8..55647409a9be 100644 --- a/net/netfilter/nf_conntrack_proto.c +++ b/net/netfilter/nf_conntrack_proto.c @@ -45,12 +45,13 @@ static DEFINE_MUTEX(nf_ct_proto_mutex); #ifdef CONFIG_SYSCTL -__printf(5, 6) +__printf(4, 5) void nf_l4proto_log_invalid(const struct sk_buff *skb, - struct net *net, - u16 pf, u8 protonum, + const struct nf_hook_state *state, + u8 protonum, const char *fmt, ...) { + struct net *net = state->net; struct va_format vaf; va_list args; @@ -62,15 +63,16 @@ void nf_l4proto_log_invalid(const struct sk_buff *skb, vaf.fmt = fmt; vaf.va = &args; - nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL, - "nf_ct_proto_%d: %pV ", protonum, &vaf); + nf_log_packet(net, state->pf, 0, skb, state->in, state->out, + NULL, "nf_ct_proto_%d: %pV ", protonum, &vaf); va_end(args); } EXPORT_SYMBOL_GPL(nf_l4proto_log_invalid); -__printf(3, 4) +__printf(4, 5) void nf_ct_l4proto_log_invalid(const struct sk_buff *skb, const struct nf_conn *ct, + const struct nf_hook_state *state, const char *fmt, ...) { struct va_format vaf; @@ -85,7 +87,7 @@ void nf_ct_l4proto_log_invalid(const struct sk_buff *skb, vaf.fmt = fmt; vaf.va = &args; - nf_l4proto_log_invalid(skb, net, nf_ct_l3num(ct), + nf_l4proto_log_invalid(skb, state, nf_ct_protonum(ct), "%pV", &vaf); va_end(args); } diff --git a/net/netfilter/nf_conntrack_proto_dccp.c b/net/netfilter/nf_conntrack_proto_dccp.c index 4f33307fa3cf..c1557d47ccd1 100644 --- a/net/netfilter/nf_conntrack_proto_dccp.c +++ b/net/netfilter/nf_conntrack_proto_dccp.c @@ -382,7 +382,8 @@ dccp_state_table[CT_DCCP_ROLE_MAX + 1][DCCP_PKT_SYNCACK + 1][CT_DCCP_MAX + 1] = static noinline bool dccp_new(struct nf_conn *ct, const struct sk_buff *skb, - const struct dccp_hdr *dh) + const struct dccp_hdr *dh, + const struct nf_hook_state *hook_state) { struct net *net = nf_ct_net(ct); struct nf_dccp_net *dn; @@ -414,7 +415,7 @@ dccp_new(struct nf_conn *ct, const struct sk_buff *skb, return true; out_invalid: - nf_ct_l4proto_log_invalid(skb, ct, "%s", msg); + nf_ct_l4proto_log_invalid(skb, ct, hook_state, "%s", msg); return false; } @@ -464,8 +465,7 @@ static bool dccp_error(const struct dccp_hdr *dh, } return false; out_invalid: - nf_l4proto_log_invalid(skb, state->net, state->pf, - IPPROTO_DCCP, "%s", msg); + nf_l4proto_log_invalid(skb, state, IPPROTO_DCCP, "%s", msg); return true; } @@ -488,7 +488,7 @@ int nf_conntrack_dccp_packet(struct nf_conn *ct, struct sk_buff *skb, return -NF_ACCEPT; type = dh->dccph_type; - if (!nf_ct_is_confirmed(ct) && !dccp_new(ct, skb, dh)) + if (!nf_ct_is_confirmed(ct) && !dccp_new(ct, skb, dh, state)) return -NF_ACCEPT; if (type == DCCP_PKT_RESET && @@ -543,11 +543,11 @@ int nf_conntrack_dccp_packet(struct nf_conn *ct, struct sk_buff *skb, ct->proto.dccp.last_pkt = type; spin_unlock_bh(&ct->lock); - nf_ct_l4proto_log_invalid(skb, ct, "%s", "invalid packet"); + nf_ct_l4proto_log_invalid(skb, ct, state, "%s", "invalid packet"); return NF_ACCEPT; case CT_DCCP_INVALID: spin_unlock_bh(&ct->lock); - nf_ct_l4proto_log_invalid(skb, ct, "%s", "invalid state transition"); + nf_ct_l4proto_log_invalid(skb, ct, state, "%s", "invalid state transition"); return -NF_ACCEPT; } diff --git a/net/netfilter/nf_conntrack_proto_icmp.c b/net/netfilter/nf_conntrack_proto_icmp.c index 4efd8741c105..b38b7164acd5 100644 --- a/net/netfilter/nf_conntrack_proto_icmp.c +++ b/net/netfilter/nf_conntrack_proto_icmp.c @@ -170,12 +170,12 @@ int nf_conntrack_inet_error(struct nf_conn *tmpl, struct sk_buff *skb, ct_daddr = &ct->tuplehash[dir].tuple.dst.u3; if (!nf_inet_addr_cmp(outer_daddr, ct_daddr)) { if (state->pf == AF_INET) { - nf_l4proto_log_invalid(skb, state->net, state->pf, + nf_l4proto_log_invalid(skb, state, l4proto, "outer daddr %pI4 != inner %pI4", &outer_daddr->ip, &ct_daddr->ip); } else if (state->pf == AF_INET6) { - nf_l4proto_log_invalid(skb, state->net, state->pf, + nf_l4proto_log_invalid(skb, state, l4proto, "outer daddr %pI6 != inner %pI6", &outer_daddr->ip6, &ct_daddr->ip6); @@ -197,8 +197,7 @@ static void icmp_error_log(const struct sk_buff *skb, const struct nf_hook_state *state, const char *msg) { - nf_l4proto_log_invalid(skb, state->net, state->pf, - IPPROTO_ICMP, "%s", msg); + nf_l4proto_log_invalid(skb, state, IPPROTO_ICMP, "%s", msg); } /* Small and modified version of icmp_rcv */ diff --git a/net/netfilter/nf_conntrack_proto_icmpv6.c b/net/netfilter/nf_conntrack_proto_icmpv6.c index facd8c64ec4e..61e3b05cf02c 100644 --- a/net/netfilter/nf_conntrack_proto_icmpv6.c +++ b/net/netfilter/nf_conntrack_proto_icmpv6.c @@ -126,8 +126,7 @@ static void icmpv6_error_log(const struct sk_buff *skb, const struct nf_hook_state *state, const char *msg) { - nf_l4proto_log_invalid(skb, state->net, state->pf, - IPPROTO_ICMPV6, "%s", msg); + nf_l4proto_log_invalid(skb, state, IPPROTO_ICMPV6, "%s", msg); } int nf_conntrack_icmpv6_error(struct nf_conn *tmpl, diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c index fb8dc02e502f..2394238d01c9 100644 --- a/net/netfilter/nf_conntrack_proto_sctp.c +++ b/net/netfilter/nf_conntrack_proto_sctp.c @@ -351,7 +351,7 @@ static bool sctp_error(struct sk_buff *skb, } return false; out_invalid: - nf_l4proto_log_invalid(skb, state->net, state->pf, IPPROTO_SCTP, "%s", logmsg); + nf_l4proto_log_invalid(skb, state, IPPROTO_SCTP, "%s", logmsg); return true; } diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c index de840fc41a2e..f7e8baf59b51 100644 --- a/net/netfilter/nf_conntrack_proto_tcp.c +++ b/net/netfilter/nf_conntrack_proto_tcp.c @@ -446,14 +446,15 @@ static void tcp_sack(const struct sk_buff *skb, unsigned int dataoff, } } -static bool tcp_in_window(const struct nf_conn *ct, - struct ip_ct_tcp *state, +static bool tcp_in_window(struct nf_conn *ct, enum ip_conntrack_dir dir, unsigned int index, const struct sk_buff *skb, unsigned int dataoff, - const struct tcphdr *tcph) + const struct tcphdr *tcph, + const struct nf_hook_state *hook_state) { + struct ip_ct_tcp *state = &ct->proto.tcp; struct net *net = nf_ct_net(ct); struct nf_tcp_net *tn = nf_tcp_pernet(net); struct ip_ct_tcp_state *sender = &state->seen[dir]; @@ -670,7 +671,7 @@ static bool tcp_in_window(const struct nf_conn *ct, tn->tcp_be_liberal) res = true; if (!res) { - nf_ct_l4proto_log_invalid(skb, ct, + nf_ct_l4proto_log_invalid(skb, ct, hook_state, "%s", before(seq, sender->td_maxend + 1) ? in_recv_win ? @@ -710,7 +711,7 @@ static void tcp_error_log(const struct sk_buff *skb, const struct nf_hook_state *state, const char *msg) { - nf_l4proto_log_invalid(skb, state->net, state->pf, IPPROTO_TCP, "%s", msg); + nf_l4proto_log_invalid(skb, state, IPPROTO_TCP, "%s", msg); } /* Protect conntrack agaist broken packets. Code taken from ipt_unclean.c. */ @@ -970,7 +971,7 @@ int nf_conntrack_tcp_packet(struct nf_conn *ct, IP_CT_EXP_CHALLENGE_ACK; } spin_unlock_bh(&ct->lock); - nf_ct_l4proto_log_invalid(skb, ct, + nf_ct_l4proto_log_invalid(skb, ct, state, "packet (index %d) in dir %d ignored, state %s", index, dir, tcp_conntrack_names[old_state]); @@ -995,7 +996,7 @@ int nf_conntrack_tcp_packet(struct nf_conn *ct, pr_debug("nf_ct_tcp: Invalid dir=%i index=%u ostate=%u\n", dir, get_conntrack_index(th), old_state); spin_unlock_bh(&ct->lock); - nf_ct_l4proto_log_invalid(skb, ct, "invalid state"); + nf_ct_l4proto_log_invalid(skb, ct, state, "invalid state"); return -NF_ACCEPT; case TCP_CONNTRACK_TIME_WAIT: /* RFC5961 compliance cause stack to send "challenge-ACK" @@ -1010,7 +1011,7 @@ int nf_conntrack_tcp_packet(struct nf_conn *ct, /* Detected RFC5961 challenge ACK */ ct->proto.tcp.last_flags &= ~IP_CT_EXP_CHALLENGE_ACK; spin_unlock_bh(&ct->lock); - nf_ct_l4proto_log_invalid(skb, ct, "challenge-ack ignored"); + nf_ct_l4proto_log_invalid(skb, ct, state, "challenge-ack ignored"); return NF_ACCEPT; /* Don't change state */ } break; @@ -1035,7 +1036,7 @@ int nf_conntrack_tcp_packet(struct nf_conn *ct, if (before(seq, ct->proto.tcp.seen[!dir].td_maxack)) { /* Invalid RST */ spin_unlock_bh(&ct->lock); - nf_ct_l4proto_log_invalid(skb, ct, "invalid rst"); + nf_ct_l4proto_log_invalid(skb, ct, state, "invalid rst"); return -NF_ACCEPT; } @@ -1079,8 +1080,8 @@ int nf_conntrack_tcp_packet(struct nf_conn *ct, break; } - if (!tcp_in_window(ct, &ct->proto.tcp, dir, index, - skb, dataoff, th)) { + if (!tcp_in_window(ct, dir, index, + skb, dataoff, th, state)) { spin_unlock_bh(&ct->lock); return -NF_ACCEPT; } diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c index 68911fcaa0f1..698fee49e732 100644 --- a/net/netfilter/nf_conntrack_proto_udp.c +++ b/net/netfilter/nf_conntrack_proto_udp.c @@ -38,8 +38,7 @@ static void udp_error_log(const struct sk_buff *skb, const struct nf_hook_state *state, const char *msg) { - nf_l4proto_log_invalid(skb, state->net, state->pf, - IPPROTO_UDP, "%s", msg); + nf_l4proto_log_invalid(skb, state, IPPROTO_UDP, "%s", msg); } static bool udp_error(struct sk_buff *skb, @@ -130,8 +129,7 @@ static void udplite_error_log(const struct sk_buff *skb, const struct nf_hook_state *state, const char *msg) { - nf_l4proto_log_invalid(skb, state->net, state->pf, - IPPROTO_UDPLITE, "%s", msg); + nf_l4proto_log_invalid(skb, state, IPPROTO_UDPLITE, "%s", msg); } static bool udplite_error(struct sk_buff *skb, diff --git a/net/netfilter/nf_tables_core.c b/net/netfilter/nf_tables_core.c index 7780342e2f2d..866cfba04d6c 100644 --- a/net/netfilter/nf_tables_core.c +++ b/net/netfilter/nf_tables_core.c @@ -268,6 +268,7 @@ static struct nft_expr_type *nft_basic_types[] = { &nft_meta_type, &nft_rt_type, &nft_exthdr_type, + &nft_last_type, }; static struct nft_object_type *nft_basic_objects[] = { diff --git a/net/netfilter/nfnetlink_hook.c b/net/netfilter/nfnetlink_hook.c index 58fda6ac663b..50b4e3c9347a 100644 --- a/net/netfilter/nfnetlink_hook.c +++ b/net/netfilter/nfnetlink_hook.c @@ -126,8 +126,10 @@ static int nfnl_hook_dump_one(struct sk_buff *nlskb, #ifdef CONFIG_KALLSYMS ret = snprintf(sym, sizeof(sym), "%ps", ops->hook); - if (ret < 0 || ret > (int)sizeof(sym)) + if (ret >= sizeof(sym)) { + ret = -EINVAL; goto nla_put_failure; + } module_name = strstr(sym, " ["); if (module_name) { diff --git a/net/netfilter/nft_exthdr.c b/net/netfilter/nft_exthdr.c index 7f705b5c09de..4f583d2e220e 100644 --- a/net/netfilter/nft_exthdr.c +++ b/net/netfilter/nft_exthdr.c @@ -164,7 +164,7 @@ nft_tcp_header_pointer(const struct nft_pktinfo *pkt, { struct tcphdr *tcph; - if (!pkt->tprot_set || pkt->tprot != IPPROTO_TCP) + if (pkt->tprot != IPPROTO_TCP) return NULL; tcph = skb_header_pointer(pkt->skb, nft_thoff(pkt), sizeof(*tcph), buffer); @@ -312,6 +312,9 @@ static void nft_exthdr_sctp_eval(const struct nft_expr *expr, const struct sctp_chunkhdr *sch; struct sctp_chunkhdr _sch; + if (pkt->tprot != IPPROTO_SCTP) + goto err; + do { sch = skb_header_pointer(pkt->skb, offset, sizeof(_sch), &_sch); if (!sch || !sch->length) @@ -334,7 +337,7 @@ static void nft_exthdr_sctp_eval(const struct nft_expr *expr, } offset += SCTP_PAD4(ntohs(sch->length)); } while (offset < pkt->skb->len); - +err: if (priv->flags & NFT_EXTHDR_F_PRESENT) nft_reg_store8(dest, false); else diff --git a/net/netfilter/nft_last.c b/net/netfilter/nft_last.c new file mode 100644 index 000000000000..913ac45167f2 --- /dev/null +++ b/net/netfilter/nft_last.c @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/netlink.h> +#include <linux/netfilter.h> +#include <linux/netfilter/nf_tables.h> +#include <net/netfilter/nf_tables_core.h> +#include <net/netfilter/nf_tables.h> + +struct nft_last_priv { + unsigned long last_jiffies; + unsigned int last_set; +}; + +static const struct nla_policy nft_last_policy[NFTA_LAST_MAX + 1] = { + [NFTA_LAST_SET] = { .type = NLA_U32 }, + [NFTA_LAST_MSECS] = { .type = NLA_U64 }, +}; + +static int nft_last_init(const struct nft_ctx *ctx, const struct nft_expr *expr, + const struct nlattr * const tb[]) +{ + struct nft_last_priv *priv = nft_expr_priv(expr); + u64 last_jiffies; + int err; + + if (tb[NFTA_LAST_MSECS]) { + err = nf_msecs_to_jiffies64(tb[NFTA_LAST_MSECS], &last_jiffies); + if (err < 0) + return err; + + priv->last_jiffies = jiffies + (unsigned long)last_jiffies; + priv->last_set = 1; + } + + return 0; +} + +static void nft_last_eval(const struct nft_expr *expr, + struct nft_regs *regs, const struct nft_pktinfo *pkt) +{ + struct nft_last_priv *priv = nft_expr_priv(expr); + + priv->last_jiffies = jiffies; + priv->last_set = 1; +} + +static int nft_last_dump(struct sk_buff *skb, const struct nft_expr *expr) +{ + struct nft_last_priv *priv = nft_expr_priv(expr); + __be64 msecs; + + if (time_before(jiffies, priv->last_jiffies)) + priv->last_set = 0; + + if (priv->last_set) + msecs = nf_jiffies64_to_msecs(jiffies - priv->last_jiffies); + else + msecs = 0; + + if (nla_put_be32(skb, NFTA_LAST_SET, htonl(priv->last_set)) || + nla_put_be64(skb, NFTA_LAST_MSECS, msecs, NFTA_LAST_PAD)) + goto nla_put_failure; + + return 0; + +nla_put_failure: + return -1; +} + +static const struct nft_expr_ops nft_last_ops = { + .type = &nft_last_type, + .size = NFT_EXPR_SIZE(sizeof(struct nft_last_priv)), + .eval = nft_last_eval, + .init = nft_last_init, + .dump = nft_last_dump, +}; + +struct nft_expr_type nft_last_type __read_mostly = { + .name = "last", + .ops = &nft_last_ops, + .policy = nft_last_policy, + .maxattr = NFTA_LAST_MAX, + .flags = NFT_EXPR_STATEFUL, + .owner = THIS_MODULE, +}; |