From 195b7fc53c6f45feb0f649c7c68af70900928253 Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Thu, 11 Apr 2024 10:17:04 +0100 Subject: tipc: remove redundant assignment to ret, simplify code Variable err is being assigned a zero value and it is never read afterwards in either the break path or continue path, the assignment is redundant and can be removed. With it removed, the if statement can also be simplified. Cleans up clang scan warning: net/tipc/socket.c:3570:5: warning: Value stored to 'err' is never read [deadcode.DeadStores] Signed-off-by: Colin Ian King Link: https://lore.kernel.org/r/20240411091704.306752-1-colin.i.king@gmail.com Signed-off-by: Jakub Kicinski --- net/tipc/socket.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'net/tipc') diff --git a/net/tipc/socket.c b/net/tipc/socket.c index 7e4135db5816..798397b6811e 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -3565,11 +3565,8 @@ int tipc_nl_sk_walk(struct sk_buff *skb, struct netlink_callback *cb, rhashtable_walk_start(iter); while ((tsk = rhashtable_walk_next(iter)) != NULL) { if (IS_ERR(tsk)) { - err = PTR_ERR(tsk); - if (err == -EAGAIN) { - err = 0; + if (PTR_ERR(tsk) == -EAGAIN) continue; - } break; } -- cgit v1.2.3 From 05d6d492097c55f2d153fc3fd33cbe78e1e28e0a Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 29 Apr 2024 13:30:09 +0000 Subject: inet: introduce dst_rtable() helper I added dst_rt6_info() in commit e8dfd42c17fa ("ipv6: introduce dst_rt6_info() helper") This patch does a similar change for IPv4. Instead of (struct rtable *)dst casts, we can use : #define dst_rtable(_ptr) \ container_of_const(_ptr, struct rtable, dst) Patch is smaller than IPv6 one, because IPv4 has skb_rtable() helper. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Reviewed-by: Sabrina Dubroca Link: https://lore.kernel.org/r/20240429133009.1227754-1-edumazet@google.com Signed-off-by: Jakub Kicinski --- drivers/infiniband/core/addr.c | 12 +++--------- drivers/net/vrf.c | 2 +- drivers/s390/net/qeth_core.h | 5 ++--- include/linux/skbuff.h | 9 --------- include/net/ip.h | 4 ++-- include/net/route.h | 11 +++++++++++ net/atm/clip.c | 2 +- net/core/dst_cache.c | 2 +- net/core/filter.c | 3 +-- net/ipv4/af_inet.c | 2 +- net/ipv4/icmp.c | 26 ++++++++++++++------------ net/ipv4/ip_input.c | 2 +- net/ipv4/ip_output.c | 8 ++++---- net/ipv4/route.c | 24 +++++++++++------------- net/ipv4/udp.c | 2 +- net/ipv4/xfrm4_policy.c | 2 +- net/l2tp/l2tp_ip.c | 2 +- net/mpls/mpls_iptunnel.c | 2 +- net/netfilter/ipvs/ip_vs_xmit.c | 2 +- net/netfilter/nf_flow_table_ip.c | 4 ++-- net/netfilter/nft_rt.c | 2 +- net/sctp/protocol.c | 4 ++-- net/tipc/udp_media.c | 2 +- 23 files changed, 64 insertions(+), 70 deletions(-) (limited to 'net/tipc') diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c index f20dfe70fa0e..be0743dac3ff 100644 --- a/drivers/infiniband/core/addr.c +++ b/drivers/infiniband/core/addr.c @@ -348,16 +348,10 @@ static int dst_fetch_ha(const struct dst_entry *dst, static bool has_gateway(const struct dst_entry *dst, sa_family_t family) { - const struct rtable *rt; - const struct rt6_info *rt6; + if (family == AF_INET) + return dst_rtable(dst)->rt_uses_gateway; - if (family == AF_INET) { - rt = container_of(dst, struct rtable, dst); - return rt->rt_uses_gateway; - } - - rt6 = dst_rt6_info(dst); - return rt6->rt6i_flags & RTF_GATEWAY; + return dst_rt6_info(dst)->rt6i_flags & RTF_GATEWAY; } static int fetch_ha(const struct dst_entry *dst, struct rdma_dev_addr *dev_addr, diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c index 784b9b2d275e..3a252ac5dd28 100644 --- a/drivers/net/vrf.c +++ b/drivers/net/vrf.c @@ -860,7 +860,7 @@ static int vrf_rt6_create(struct net_device *dev) static int vrf_finish_output(struct net *net, struct sock *sk, struct sk_buff *skb) { struct dst_entry *dst = skb_dst(skb); - struct rtable *rt = (struct rtable *)dst; + struct rtable *rt = dst_rtable(dst); struct net_device *dev = dst->dev; unsigned int hh_len = LL_RESERVED_SPACE(dev); struct neighbour *neigh; diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index 5f17a2a5d0e3..41fe8a043d61 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -970,9 +970,8 @@ static inline struct dst_entry *qeth_dst_check_rcu(struct sk_buff *skb, static inline __be32 qeth_next_hop_v4_rcu(struct sk_buff *skb, struct dst_entry *dst) { - struct rtable *rt = (struct rtable *) dst; - - return (rt) ? rt_nexthop(rt, ip_hdr(skb)->daddr) : ip_hdr(skb)->daddr; + return (dst) ? rt_nexthop(dst_rtable(dst), ip_hdr(skb)->daddr) : + ip_hdr(skb)->daddr; } static inline struct in6_addr *qeth_next_hop_v6_rcu(struct sk_buff *skb, diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index f76825e5b92a..adf75d69770c 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1180,15 +1180,6 @@ static inline bool skb_dst_is_noref(const struct sk_buff *skb) return (skb->_skb_refdst & SKB_DST_NOREF) && skb_dst(skb); } -/** - * skb_rtable - Returns the skb &rtable - * @skb: buffer - */ -static inline struct rtable *skb_rtable(const struct sk_buff *skb) -{ - return (struct rtable *)skb_dst(skb); -} - /* For mangling skb->pkt_type from user space side from applications * such as nft, tc, etc, we only allow a conservative subset of * possible pkt_types to be set. diff --git a/include/net/ip.h b/include/net/ip.h index 25cb688bdc62..6d735e00d3f3 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -423,7 +423,7 @@ int ip_decrease_ttl(struct iphdr *iph) static inline int ip_mtu_locked(const struct dst_entry *dst) { - const struct rtable *rt = (const struct rtable *)dst; + const struct rtable *rt = dst_rtable(dst); return rt->rt_mtu_locked || dst_metric_locked(dst, RTAX_MTU); } @@ -461,7 +461,7 @@ static inline bool ip_sk_ignore_df(const struct sock *sk) static inline unsigned int ip_dst_mtu_maybe_forward(const struct dst_entry *dst, bool forwarding) { - const struct rtable *rt = container_of(dst, struct rtable, dst); + const struct rtable *rt = dst_rtable(dst); struct net *net = dev_net(dst->dev); unsigned int mtu; diff --git a/include/net/route.h b/include/net/route.h index 630d1ef6868a..93833cfe9c96 100644 --- a/include/net/route.h +++ b/include/net/route.h @@ -75,6 +75,17 @@ struct rtable { rt_pmtu:31; }; +#define dst_rtable(_ptr) container_of_const(_ptr, struct rtable, dst) + +/** + * skb_rtable - Returns the skb &rtable + * @skb: buffer + */ +static inline struct rtable *skb_rtable(const struct sk_buff *skb) +{ + return dst_rtable(skb_dst(skb)); +} + static inline bool rt_is_input_route(const struct rtable *rt) { return rt->rt_is_input != 0; diff --git a/net/atm/clip.c b/net/atm/clip.c index 362e8d25a79e..42b910cb4e8e 100644 --- a/net/atm/clip.c +++ b/net/atm/clip.c @@ -345,7 +345,7 @@ static netdev_tx_t clip_start_xmit(struct sk_buff *skb, dev->stats.tx_dropped++; return NETDEV_TX_OK; } - rt = (struct rtable *) dst; + rt = dst_rtable(dst); if (rt->rt_gw_family == AF_INET) daddr = &rt->rt_gw4; else diff --git a/net/core/dst_cache.c b/net/core/dst_cache.c index b17171345d64..0c0bdb058c5b 100644 --- a/net/core/dst_cache.c +++ b/net/core/dst_cache.c @@ -83,7 +83,7 @@ struct rtable *dst_cache_get_ip4(struct dst_cache *dst_cache, __be32 *saddr) return NULL; *saddr = idst->in_saddr.s_addr; - return container_of(dst, struct rtable, dst); + return dst_rtable(dst); } EXPORT_SYMBOL_GPL(dst_cache_get_ip4); diff --git a/net/core/filter.c b/net/core/filter.c index 6d319c76188b..29165744c505 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -2317,8 +2317,7 @@ static int bpf_out_neigh_v4(struct net *net, struct sk_buff *skb, rcu_read_lock(); if (!nh) { - struct dst_entry *dst = skb_dst(skb); - struct rtable *rt = container_of(dst, struct rtable, dst); + struct rtable *rt = skb_rtable(skb); neigh = ip_neigh_for_gw(rt, skb, &is_v6gw); } else if (nh->nh_family == AF_INET6) { diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index a7cfeda28bb2..486a8d4f53b1 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1307,8 +1307,8 @@ static int inet_sk_reselect_saddr(struct sock *sk) int inet_sk_rebuild_header(struct sock *sk) { + struct rtable *rt = dst_rtable(__sk_dst_check(sk, 0)); struct inet_sock *inet = inet_sk(sk); - struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0); __be32 daddr; struct ip_options_rcu *inet_opt; struct flowi4 *fl4; diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 437e782b9663..207482d30dc7 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -483,6 +483,7 @@ static struct rtable *icmp_route_lookup(struct net *net, struct icmp_bxm *param) { struct net_device *route_lookup_dev; + struct dst_entry *dst, *dst2; struct rtable *rt, *rt2; struct flowi4 fl4_dec; int err; @@ -508,16 +509,17 @@ static struct rtable *icmp_route_lookup(struct net *net, /* No need to clone since we're just using its address. */ rt2 = rt; - rt = (struct rtable *) xfrm_lookup(net, &rt->dst, - flowi4_to_flowi(fl4), NULL, 0); - if (!IS_ERR(rt)) { + dst = xfrm_lookup(net, &rt->dst, + flowi4_to_flowi(fl4), NULL, 0); + rt = dst_rtable(dst); + if (!IS_ERR(dst)) { if (rt != rt2) return rt; - } else if (PTR_ERR(rt) == -EPERM) { + } else if (PTR_ERR(dst) == -EPERM) { rt = NULL; - } else + } else { return rt; - + } err = xfrm_decode_session_reverse(net, skb_in, flowi4_to_flowi(&fl4_dec), AF_INET); if (err) goto relookup_failed; @@ -551,19 +553,19 @@ static struct rtable *icmp_route_lookup(struct net *net, if (err) goto relookup_failed; - rt2 = (struct rtable *) xfrm_lookup(net, &rt2->dst, - flowi4_to_flowi(&fl4_dec), NULL, - XFRM_LOOKUP_ICMP); - if (!IS_ERR(rt2)) { + dst2 = xfrm_lookup(net, &rt2->dst, flowi4_to_flowi(&fl4_dec), NULL, + XFRM_LOOKUP_ICMP); + rt2 = dst_rtable(dst2); + if (!IS_ERR(dst2)) { dst_release(&rt->dst); memcpy(fl4, &fl4_dec, sizeof(*fl4)); rt = rt2; - } else if (PTR_ERR(rt2) == -EPERM) { + } else if (PTR_ERR(dst2) == -EPERM) { if (rt) dst_release(&rt->dst); return rt2; } else { - err = PTR_ERR(rt2); + err = PTR_ERR(dst2); goto relookup_failed; } return rt; diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index 5e9c8156656a..d6fbcbd2358a 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -616,7 +616,7 @@ static void ip_list_rcv_finish(struct net *net, struct sock *sk, dst = skb_dst(skb); if (curr_dst != dst) { hint = ip_extract_route_hint(net, skb, - ((struct rtable *)dst)->rt_type); + dst_rtable(dst)->rt_type); /* dispatch old sublist */ if (!list_empty(&sublist)) diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 1fe794967211..b455bd05a7d5 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -198,7 +198,7 @@ EXPORT_SYMBOL_GPL(ip_build_and_send_pkt); static int ip_finish_output2(struct net *net, struct sock *sk, struct sk_buff *skb) { struct dst_entry *dst = skb_dst(skb); - struct rtable *rt = (struct rtable *)dst; + struct rtable *rt = dst_rtable(dst); struct net_device *dev = dst->dev; unsigned int hh_len = LL_RESERVED_SPACE(dev); struct neighbour *neigh; @@ -475,7 +475,7 @@ int __ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl, goto packet_routed; /* Make sure we can route this packet. */ - rt = (struct rtable *)__sk_dst_check(sk, 0); + rt = dst_rtable(__sk_dst_check(sk, 0)); if (!rt) { __be32 daddr; @@ -971,7 +971,7 @@ static int __ip_append_data(struct sock *sk, bool zc = false; unsigned int maxfraglen, fragheaderlen, maxnonfragsize; int csummode = CHECKSUM_NONE; - struct rtable *rt = (struct rtable *)cork->dst; + struct rtable *rt = dst_rtable(cork->dst); bool paged, hold_tskey, extra_uref = false; unsigned int wmem_alloc_delta = 0; u32 tskey = 0; @@ -1390,7 +1390,7 @@ struct sk_buff *__ip_make_skb(struct sock *sk, struct inet_sock *inet = inet_sk(sk); struct net *net = sock_net(sk); struct ip_options *opt = NULL; - struct rtable *rt = (struct rtable *)cork->dst; + struct rtable *rt = dst_rtable(cork->dst); struct iphdr *iph; u8 pmtudisc, ttl; __be16 df = 0; diff --git a/net/ipv4/route.c b/net/ipv4/route.c index f89ff2e5a05b..0fd9a3d7ac4a 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -819,7 +819,7 @@ static void ip_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_buf u32 mark = skb->mark; __u8 tos = iph->tos; - rt = (struct rtable *) dst; + rt = dst_rtable(dst); __build_flow_key(net, &fl4, sk, iph, oif, tos, prot, mark, 0); __ip_do_redirect(rt, skb, &fl4, true); @@ -827,7 +827,7 @@ static void ip_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_buf static struct dst_entry *ipv4_negative_advice(struct dst_entry *dst) { - struct rtable *rt = (struct rtable *)dst; + struct rtable *rt = dst_rtable(dst); struct dst_entry *ret = dst; if (rt) { @@ -1044,7 +1044,7 @@ static void ip_rt_update_pmtu(struct dst_entry *dst, struct sock *sk, struct sk_buff *skb, u32 mtu, bool confirm_neigh) { - struct rtable *rt = (struct rtable *) dst; + struct rtable *rt = dst_rtable(dst); struct flowi4 fl4; ip_rt_build_flow_key(&fl4, sk, skb); @@ -1115,7 +1115,7 @@ void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu) __build_flow_key(net, &fl4, sk, iph, 0, 0, 0, 0, 0); - rt = (struct rtable *)odst; + rt = dst_rtable(odst); if (odst->obsolete && !odst->ops->check(odst, 0)) { rt = ip_route_output_flow(sock_net(sk), &fl4, sk); if (IS_ERR(rt)) @@ -1124,7 +1124,7 @@ void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu) new = true; } - __ip_rt_update_pmtu((struct rtable *)xfrm_dst_path(&rt->dst), &fl4, mtu); + __ip_rt_update_pmtu(dst_rtable(xfrm_dst_path(&rt->dst)), &fl4, mtu); if (!dst_check(&rt->dst, 0)) { if (new) @@ -1181,7 +1181,7 @@ EXPORT_SYMBOL_GPL(ipv4_sk_redirect); INDIRECT_CALLABLE_SCOPE struct dst_entry *ipv4_dst_check(struct dst_entry *dst, u32 cookie) { - struct rtable *rt = (struct rtable *) dst; + struct rtable *rt = dst_rtable(dst); /* All IPV4 dsts are created with ->obsolete set to the value * DST_OBSOLETE_FORCE_CHK which forces validation calls down @@ -1516,10 +1516,8 @@ void rt_del_uncached_list(struct rtable *rt) static void ipv4_dst_destroy(struct dst_entry *dst) { - struct rtable *rt = (struct rtable *)dst; - ip_dst_metrics_put(dst); - rt_del_uncached_list(rt); + rt_del_uncached_list(dst_rtable(dst)); } void rt_flush_dev(struct net_device *dev) @@ -2820,7 +2818,7 @@ static struct dst_ops ipv4_dst_blackhole_ops = { struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig) { - struct rtable *ort = (struct rtable *) dst_orig; + struct rtable *ort = dst_rtable(dst_orig); struct rtable *rt; rt = dst_alloc(&ipv4_dst_blackhole_ops, NULL, DST_OBSOLETE_DEAD, 0); @@ -2865,9 +2863,9 @@ struct rtable *ip_route_output_flow(struct net *net, struct flowi4 *flp4, if (flp4->flowi4_proto) { flp4->flowi4_oif = rt->dst.dev->ifindex; - rt = (struct rtable *)xfrm_lookup_route(net, &rt->dst, - flowi4_to_flowi(flp4), - sk, 0); + rt = dst_rtable(xfrm_lookup_route(net, &rt->dst, + flowi4_to_flowi(flp4), + sk, 0)); } return rt; diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 6e2446295089..fe55ff5d379b 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1217,7 +1217,7 @@ int udp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) } if (connected) - rt = (struct rtable *)sk_dst_check(sk, 0); + rt = dst_rtable(sk_dst_check(sk, 0)); if (!rt) { struct net *net = sock_net(sk); diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c index 1dda59e0aeab..fccbbd3e1a4b 100644 --- a/net/ipv4/xfrm4_policy.c +++ b/net/ipv4/xfrm4_policy.c @@ -69,7 +69,7 @@ static int xfrm4_get_saddr(struct net *net, int oif, static int xfrm4_fill_dst(struct xfrm_dst *xdst, struct net_device *dev, const struct flowi *fl) { - struct rtable *rt = (struct rtable *)xdst->route; + struct rtable *rt = dst_rtable(xdst->route); const struct flowi4 *fl4 = &fl->u.ip4; xdst->u.rt.rt_iif = fl4->flowi4_iif; diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c index 970af3983d11..19c8cc5289d5 100644 --- a/net/l2tp/l2tp_ip.c +++ b/net/l2tp/l2tp_ip.c @@ -459,7 +459,7 @@ static int l2tp_ip_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) fl4 = &inet->cork.fl.u.ip4; if (connected) - rt = (struct rtable *)__sk_dst_check(sk, 0); + rt = dst_rtable(__sk_dst_check(sk, 0)); rcu_read_lock(); if (!rt) { diff --git a/net/mpls/mpls_iptunnel.c b/net/mpls/mpls_iptunnel.c index 606349c8df0e..4385fd3b13be 100644 --- a/net/mpls/mpls_iptunnel.c +++ b/net/mpls/mpls_iptunnel.c @@ -81,7 +81,7 @@ static int mpls_xmit(struct sk_buff *skb) ttl = net->mpls.default_ttl; else ttl = ip_hdr(skb)->ttl; - rt = (struct rtable *)dst; + rt = dst_rtable(dst); } else if (dst->ops->family == AF_INET6) { if (tun_encap_info->ttl_propagate == MPLS_TTL_PROP_DISABLED) ttl = tun_encap_info->default_ttl; diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c index 6e8b9d100ad2..3313bceb6cc9 100644 --- a/net/netfilter/ipvs/ip_vs_xmit.c +++ b/net/netfilter/ipvs/ip_vs_xmit.c @@ -318,7 +318,7 @@ __ip_vs_get_out_rt(struct netns_ipvs *ipvs, int skb_af, struct sk_buff *skb, if (dest) { dest_dst = __ip_vs_dst_check(dest); if (likely(dest_dst)) - rt = (struct rtable *) dest_dst->dst_cache; + rt = dst_rtable(dest_dst->dst_cache); else { dest_dst = ip_vs_dest_dst_alloc(); spin_lock_bh(&dest->dst_lock); diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c index 100887beed31..c2c005234dcd 100644 --- a/net/netfilter/nf_flow_table_ip.c +++ b/net/netfilter/nf_flow_table_ip.c @@ -434,7 +434,7 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, return NF_ACCEPT; if (unlikely(tuplehash->tuple.xmit_type == FLOW_OFFLOAD_XMIT_XFRM)) { - rt = (struct rtable *)tuplehash->tuple.dst_cache; + rt = dst_rtable(tuplehash->tuple.dst_cache); memset(skb->cb, 0, sizeof(struct inet_skb_parm)); IPCB(skb)->iif = skb->dev->ifindex; IPCB(skb)->flags = IPSKB_FORWARDED; @@ -446,7 +446,7 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb, switch (tuplehash->tuple.xmit_type) { case FLOW_OFFLOAD_XMIT_NEIGH: - rt = (struct rtable *)tuplehash->tuple.dst_cache; + rt = dst_rtable(tuplehash->tuple.dst_cache); outdev = rt->dst.dev; skb->dev = outdev; nexthop = rt_nexthop(rt, flow->tuplehash[!dir].tuple.src_v4.s_addr); diff --git a/net/netfilter/nft_rt.c b/net/netfilter/nft_rt.c index 2434c624aafd..14d88394bcb7 100644 --- a/net/netfilter/nft_rt.c +++ b/net/netfilter/nft_rt.c @@ -73,7 +73,7 @@ void nft_rt_get_eval(const struct nft_expr *expr, if (nft_pf(pkt) != NFPROTO_IPV4) goto err; - *dest = (__force u32)rt_nexthop((const struct rtable *)dst, + *dest = (__force u32)rt_nexthop(dst_rtable(dst), ip_hdr(skb)->daddr); break; case NFT_RT_NEXTHOP6: diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index e849f368ed91..5a7436a13b74 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -552,7 +552,7 @@ static void sctp_v4_get_saddr(struct sctp_sock *sk, struct flowi *fl) { union sctp_addr *saddr = &t->saddr; - struct rtable *rt = (struct rtable *)t->dst; + struct rtable *rt = dst_rtable(t->dst); if (rt) { saddr->v4.sin_family = AF_INET; @@ -1085,7 +1085,7 @@ static inline int sctp_v4_xmit(struct sk_buff *skb, struct sctp_transport *t) skb_reset_inner_mac_header(skb); skb_reset_inner_transport_header(skb); skb_set_inner_ipproto(skb, IPPROTO_SCTP); - udp_tunnel_xmit_skb((struct rtable *)dst, sk, skb, fl4->saddr, + udp_tunnel_xmit_skb(dst_rtable(dst), sk, skb, fl4->saddr, fl4->daddr, dscp, ip4_dst_hoplimit(dst), df, sctp_sk(sk)->udp_port, t->encap_port, false, false); return 0; diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c index f892b0903dba..b849a3d133a0 100644 --- a/net/tipc/udp_media.c +++ b/net/tipc/udp_media.c @@ -174,7 +174,7 @@ static int tipc_udp_xmit(struct net *net, struct sk_buff *skb, local_bh_disable(); ndst = dst_cache_get(cache); if (dst->proto == htons(ETH_P_IP)) { - struct rtable *rt = (struct rtable *)ndst; + struct rtable *rt = dst_rtable(ndst); if (!rt) { struct flowi4 fl = { -- cgit v1.2.3 From 73dbd8cf7947f7da47b23f4adc07593c4dc452b4 Mon Sep 17 00:00:00 2001 From: Joel Granados Date: Wed, 1 May 2024 11:29:29 +0200 Subject: net: Remove ctl_table sentinel elements from several networking subsystems This commit comes at the tail end of a greater effort to remove the empty elements at the end of the ctl_table arrays (sentinels) which will reduce the overall build time size of the kernel and run time memory bloat by ~64 bytes per sentinel (further information Link : https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/) To avoid lots of small commits, this commit brings together network changes from (as they appear in MAINTAINERS) LLC, MPTCP, NETROM NETWORK LAYER, PHONET PROTOCOL, ROSE NETWORK LAYER, RXRPC SOCKETS, SCTP PROTOCOL, SHARED MEMORY COMMUNICATIONS (SMC), TIPC NETWORK LAYER and NETWORKING [IPSEC] * Remove sentinel element from ctl_table structs. * Replace empty array registration with the register_net_sysctl_sz call in llc_sysctl_init * Replace the for loop stop condition that tests for procname == NULL with one that depends on array size in sctp_sysctl_net_register * Remove instances where an array element is zeroed out to make it look like a sentinel in xfrm_sysctl_init. This is not longer needed and is safe after commit c899710fe7f9 ("networking: Update to register_net_sysctl_sz") added the array size to the ctl_table registration * Use a table_size variable to keep the value of ARRAY_SIZE Signed-off-by: Joel Granados Signed-off-by: David S. Miller --- net/llc/sysctl_net_llc.c | 8 ++------ net/mptcp/ctrl.c | 1 - net/netrom/sysctl_net_netrom.c | 1 - net/phonet/sysctl.c | 1 - net/rose/sysctl_net_rose.c | 1 - net/rxrpc/sysctl.c | 1 - net/sctp/sysctl.c | 10 +++------- net/smc/smc_sysctl.c | 6 +++--- net/tipc/sysctl.c | 1 - net/xfrm/xfrm_sysctl.c | 5 +---- 10 files changed, 9 insertions(+), 26 deletions(-) (limited to 'net/tipc') diff --git a/net/llc/sysctl_net_llc.c b/net/llc/sysctl_net_llc.c index 8443a6d841b0..72e101135f8c 100644 --- a/net/llc/sysctl_net_llc.c +++ b/net/llc/sysctl_net_llc.c @@ -44,11 +44,6 @@ static struct ctl_table llc2_timeout_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - { }, -}; - -static struct ctl_table llc_station_table[] = { - { }, }; static struct ctl_table_header *llc2_timeout_header; @@ -56,8 +51,9 @@ static struct ctl_table_header *llc_station_header; int __init llc_sysctl_init(void) { + struct ctl_table empty[1] = {}; llc2_timeout_header = register_net_sysctl(&init_net, "net/llc/llc2/timeout", llc2_timeout_table); - llc_station_header = register_net_sysctl(&init_net, "net/llc/station", llc_station_table); + llc_station_header = register_net_sysctl_sz(&init_net, "net/llc/station", empty, 0); if (!llc2_timeout_header || !llc_station_header) { llc_sysctl_exit(); diff --git a/net/mptcp/ctrl.c b/net/mptcp/ctrl.c index 8d661156ab8c..f4e7a53acc5a 100644 --- a/net/mptcp/ctrl.c +++ b/net/mptcp/ctrl.c @@ -156,7 +156,6 @@ static struct ctl_table mptcp_sysctl_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, - {} }; static int mptcp_pernet_new_table(struct net *net, struct mptcp_pernet *pernet) diff --git a/net/netrom/sysctl_net_netrom.c b/net/netrom/sysctl_net_netrom.c index 79fb2d3f477b..7dc0fa628f2e 100644 --- a/net/netrom/sysctl_net_netrom.c +++ b/net/netrom/sysctl_net_netrom.c @@ -140,7 +140,6 @@ static struct ctl_table nr_table[] = { .extra1 = &min_reset, .extra2 = &max_reset }, - { } }; int __init nr_register_sysctl(void) diff --git a/net/phonet/sysctl.c b/net/phonet/sysctl.c index 0d0bf41381c2..82fc22467a09 100644 --- a/net/phonet/sysctl.c +++ b/net/phonet/sysctl.c @@ -81,7 +81,6 @@ static struct ctl_table phonet_table[] = { .mode = 0644, .proc_handler = proc_local_port_range, }, - { } }; int __init phonet_sysctl_init(void) diff --git a/net/rose/sysctl_net_rose.c b/net/rose/sysctl_net_rose.c index d391d7758f52..d801315b7083 100644 --- a/net/rose/sysctl_net_rose.c +++ b/net/rose/sysctl_net_rose.c @@ -112,7 +112,6 @@ static struct ctl_table rose_table[] = { .extra1 = &min_window, .extra2 = &max_window }, - { } }; void __init rose_register_sysctl(void) diff --git a/net/rxrpc/sysctl.c b/net/rxrpc/sysctl.c index c9bedd0e2d86..9bf9a1f6e4cb 100644 --- a/net/rxrpc/sysctl.c +++ b/net/rxrpc/sysctl.c @@ -127,7 +127,6 @@ static struct ctl_table rxrpc_sysctl_table[] = { .extra1 = (void *)SYSCTL_ONE, .extra2 = (void *)&four, }, - { } }; int __init rxrpc_sysctl_init(void) diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c index 25bdf17c7262..61c6f3027e7f 100644 --- a/net/sctp/sysctl.c +++ b/net/sctp/sysctl.c @@ -80,8 +80,6 @@ static struct ctl_table sctp_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, - - { /* sentinel */ } }; /* The following index defines are used in sctp_sysctl_net_register(). @@ -384,8 +382,6 @@ static struct ctl_table sctp_net_table[] = { .extra1 = SYSCTL_ZERO, .extra2 = &pf_expose_max, }, - - { /* sentinel */ } }; static int proc_sctp_do_hmac_alg(struct ctl_table *ctl, int write, @@ -597,6 +593,7 @@ static int proc_sctp_do_probe_interval(struct ctl_table *ctl, int write, int sctp_sysctl_net_register(struct net *net) { + size_t table_size = ARRAY_SIZE(sctp_net_table); struct ctl_table *table; int i; @@ -604,7 +601,7 @@ int sctp_sysctl_net_register(struct net *net) if (!table) return -ENOMEM; - for (i = 0; table[i].data; i++) + for (i = 0; i < table_size; i++) table[i].data += (char *)(&net->sctp) - (char *)&init_net.sctp; table[SCTP_RTO_MIN_IDX].extra2 = &net->sctp.rto_max; @@ -613,8 +610,7 @@ int sctp_sysctl_net_register(struct net *net) table[SCTP_PS_RETRANS_IDX].extra1 = &net->sctp.pf_retrans; net->sctp.sysctl_header = register_net_sysctl_sz(net, "net/sctp", - table, - ARRAY_SIZE(sctp_net_table)); + table, table_size); if (net->sctp.sysctl_header == NULL) { kfree(table); return -ENOMEM; diff --git a/net/smc/smc_sysctl.c b/net/smc/smc_sysctl.c index 4e8baa2e7ea4..13f2bc092db1 100644 --- a/net/smc/smc_sysctl.c +++ b/net/smc/smc_sysctl.c @@ -90,11 +90,11 @@ static struct ctl_table smc_table[] = { .extra1 = &conns_per_lgr_min, .extra2 = &conns_per_lgr_max, }, - { } }; int __net_init smc_sysctl_net_init(struct net *net) { + size_t table_size = ARRAY_SIZE(smc_table); struct ctl_table *table; table = smc_table; @@ -105,12 +105,12 @@ int __net_init smc_sysctl_net_init(struct net *net) if (!table) goto err_alloc; - for (i = 0; i < ARRAY_SIZE(smc_table) - 1; i++) + for (i = 0; i < table_size; i++) table[i].data += (void *)net - (void *)&init_net; } net->smc.smc_hdr = register_net_sysctl_sz(net, "net/smc", table, - ARRAY_SIZE(smc_table)); + table_size); if (!net->smc.smc_hdr) goto err_reg; diff --git a/net/tipc/sysctl.c b/net/tipc/sysctl.c index 9fb65c988f7f..30d2e06e3d8c 100644 --- a/net/tipc/sysctl.c +++ b/net/tipc/sysctl.c @@ -91,7 +91,6 @@ static struct ctl_table tipc_table[] = { .mode = 0644, .proc_handler = proc_doulongvec_minmax, }, - {} }; int tipc_register_sysctl(void) diff --git a/net/xfrm/xfrm_sysctl.c b/net/xfrm/xfrm_sysctl.c index e972930c292b..ca003e8a0376 100644 --- a/net/xfrm/xfrm_sysctl.c +++ b/net/xfrm/xfrm_sysctl.c @@ -38,7 +38,6 @@ static struct ctl_table xfrm_table[] = { .mode = 0644, .proc_handler = proc_dointvec }, - {} }; int __net_init xfrm_sysctl_init(struct net *net) @@ -57,10 +56,8 @@ int __net_init xfrm_sysctl_init(struct net *net) table[3].data = &net->xfrm.sysctl_acq_expires; /* Don't export sysctls to unprivileged users */ - if (net->user_ns != &init_user_ns) { - table[0].procname = NULL; + if (net->user_ns != &init_user_ns) table_size = 0; - } net->xfrm.sysctl_hdr = register_net_sysctl_sz(net, "net/core", table, table_size); -- cgit v1.2.3