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Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/include/net/dst_metadata.h

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/* SPDX-License-Identifier: GPL-2.0 / #ifndef __NET_DST_METADATA_H #define __NET_DST_METADATA_H 1 #include <linux/skbuff.h> #include <net/ip_tunnels.h> #include <net/dst.h> enum metadata_type { METADATA_IP_TUNNEL, METADATA_HW_PORT_MUX, }; struct hw_port_info { struct net_device lower_dev; u32 port_id; }; struct metadata_dst { struct dst_entry dst; enum metadata_type type; union { struct ip_tunnel_info tun_info; struct hw_port_info port_info; } u; }; static inline struct metadata_dst skb_metadata_dst(const struct sk_buff skb) { struct metadata_dst md_dst = (struct metadata_dst ) skb_dst(skb); if (md_dst && md_dst->dst.flags & DST_METADATA) return md_dst; return NULL; } static inline struct ip_tunnel_info * skb_tunnel_info(const struct sk_buff skb) { struct metadata_dst md_dst = skb_metadata_dst(skb); struct dst_entry dst; if (md_dst && md_dst->type == METADATA_IP_TUNNEL) return &md_dst->u.tun_info; dst = skb_dst(skb); if (dst && dst->lwtstate && (dst->lwtstate->type == LWTUNNEL_ENCAP_IP \|\| dst->lwtstate->type == LWTUNNEL_ENCAP_IP6)) return lwt_tun_info(dst->lwtstate); return NULL; } static inline bool skb_valid_dst(const struct sk_buff skb) { struct dst_entry dst = skb_dst(skb); return dst && !(dst->flags & DST_METADATA); } static inline int skb_metadata_dst_cmp(const struct sk_buff skb_a, const struct sk_buff skb_b) { const struct metadata_dst a, b; if (!(skb_a->_skb_refdst \| skb_b->_skb_refdst)) return 0; a = (const struct metadata_dst ) skb_dst(skb_a); b = (const struct metadata_dst ) skb_dst(skb_b); if (!a != !b \|\| a->type != b->type) return 1; switch (a->type) { case METADATA_HW_PORT_MUX: return memcmp(&a->u.port_info, &b->u.port_info, sizeof(a->u.port_info)); case METADATA_IP_TUNNEL: return memcmp(&a->u.tun_info, &b->u.tun_info, sizeof(a->u.tun_info) + a->u.tun_info.options_len); default: return 1; } } void metadata_dst_free(struct metadata_dst ); struct metadata_dst metadata_dst_alloc(u8 optslen, enum metadata_type type, gfp_t flags); void metadata_dst_free_percpu(struct metadata_dst __percpu md_dst); struct metadata_dst __percpu * metadata_dst_alloc_percpu(u8 optslen, enum metadata_type type, gfp_t flags); static inline struct metadata_dst tun_rx_dst(int md_size) { struct metadata_dst tun_dst; tun_dst = metadata_dst_alloc(md_size, METADATA_IP_TUNNEL, GFP_ATOMIC); if (!tun_dst) return NULL; tun_dst->u.tun_info.options_len = 0; tun_dst->u.tun_info.mode = 0; return tun_dst; } static inline struct metadata_dst tun_dst_unclone(struct sk_buff skb) { struct metadata_dst md_dst = skb_metadata_dst(skb); int md_size; struct metadata_dst new_md; if (!md_dst \|\| md_dst->type != METADATA_IP_TUNNEL) return ERR_PTR(-EINVAL); md_size = md_dst->u.tun_info.options_len; new_md = metadata_dst_alloc(md_size, METADATA_IP_TUNNEL, GFP_ATOMIC); if (!new_md) return ERR_PTR(-ENOMEM); memcpy(&new_md->u.tun_info, &md_dst->u.tun_info, sizeof(struct ip_tunnel_info) + md_size); #ifdef CONFIG_DST_CACHE /* Unclone the dst cache if there is one / if (new_md->u.tun_info.dst_cache.cache) { int ret; ret = dst_cache_init(&new_md->u.tun_info.dst_cache, GFP_ATOMIC); if (ret) { metadata_dst_free(new_md); return ERR_PTR(ret); } } #endif skb_dst_drop(skb); skb_dst_set(skb, &new_md->dst); return new_md; } static inline struct ip_tunnel_info skb_tunnel_info_unclone(struct sk_buff skb) { struct metadata_dst dst; dst = tun_dst_unclone(skb); if (IS_ERR(dst)) return NULL; return &dst->u.tun_info; } static inline struct metadata_dst __ip_tun_set_dst(__be32 saddr, __be32 daddr, __u8 tos, __u8 ttl, __be16 tp_dst, __be16 flags, __be64 tunnel_id, int md_size) { struct metadata_dst tun_dst; tun_dst = tun_rx_dst(md_size); if (!tun_dst) return NULL; ip_tunnel_key_init(&tun_dst->u.tun_info.key, saddr, daddr, tos, ttl, 0, 0, tp_dst, tunnel_id, flags); return tun_dst; } static inline struct metadata_dst ip_tun_rx_dst(struct sk_buff skb, __be16 flags, __be64 tunnel_id, int md_size) { const struct iphdr iph = ip_hdr(skb); return __ip_tun_set_dst(iph->saddr, iph->daddr, iph->tos, iph->ttl, 0, flags, tunnel_id, md_size); } static inline struct metadata_dst __ipv6_tun_set_dst(const struct in6_addr saddr, const struct in6_addr daddr, __u8 tos, __u8 ttl, __be16 tp_dst, __be32 label, __be16 flags, __be64 tunnel_id, int md_size) { struct metadata_dst tun_dst; struct ip_tunnel_info info; tun_dst = tun_rx_dst(md_size); if (!tun_dst) return NULL; info = &tun_dst->u.tun_info; info->mode = IP_TUNNEL_INFO_IPV6; info->key.tun_flags = flags; info->key.tun_id = tunnel_id; info->key.tp_src = 0; info->key.tp_dst = tp_dst; info->key.u.ipv6.src = saddr; info->key.u.ipv6.dst = daddr; info->key.tos = tos; info->key.ttl = ttl; info->key.label = label; return tun_dst; } static inline struct metadata_dst ipv6_tun_rx_dst(struct sk_buff skb, __be16 flags, __be64 tunnel_id, int md_size) { const struct ipv6hdr ip6h = ipv6_hdr(skb); return __ipv6_tun_set_dst(&ip6h->saddr, &ip6h->daddr, ipv6_get_dsfield(ip6h), ip6h->hop_limit, 0, ip6_flowlabel(ip6h), flags, tunnel_id, md_size); } #endif / __NET_DST_METADATA_H */

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