#ifndef _NET_IP6_TUNNEL_H #define _NET_IP6_TUNNEL_H #include #include #include #include #include #include #define IP6TUNNEL_ERR_TIMEO (30*HZ) /* capable of sending packets */ #define IP6_TNL_F_CAP_XMIT 0x10000 /* capable of receiving packets */ #define IP6_TNL_F_CAP_RCV 0x20000 /* determine capability on a per-packet basis */ #define IP6_TNL_F_CAP_PER_PACKET 0x40000 struct __ip6_tnl_parm { char name[IFNAMSIZ]; /* name of tunnel device */ int link; /* ifindex of underlying L2 interface */ __u8 proto; /* tunnel protocol */ __u8 encap_limit; /* encapsulation limit for tunnel */ __u8 hop_limit; /* hop limit for tunnel */ bool collect_md; __be32 flowinfo; /* traffic class and flowlabel for tunnel */ __u32 flags; /* tunnel flags */ struct in6_addr laddr; /* local tunnel end-point address */ struct in6_addr raddr; /* remote tunnel end-point address */ __be16 i_flags; __be16 o_flags; __be32 i_key; __be32 o_key; }; /* IPv6 tunnel */ struct ip6_tnl { struct ip6_tnl __rcu *next; /* next tunnel in list */ struct net_device *dev; /* virtual device associated with tunnel */ struct net *net; /* netns for packet i/o */ struct __ip6_tnl_parm parms; /* tunnel configuration parameters */ struct flowi fl; /* flowi template for xmit */ struct dst_cache dst_cache; /* cached dst */ struct gro_cells gro_cells; int err_count; unsigned long err_time; /* These fields used only by GRE */ __u32 i_seqno; /* The last seen seqno */ __u32 o_seqno; /* The last output seqno */ int hlen; /* tun_hlen + encap_hlen */ int tun_hlen; /* Precalculated header length */ int encap_hlen; /* Encap header length (FOU,GUE) */ struct ip_tunnel_encap encap; int mlink; }; struct ip6_tnl_encap_ops { size_t (*encap_hlen)(struct ip_tunnel_encap *e); int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e, u8 *protocol, struct flowi6 *fl6); }; #ifdef CONFIG_INET extern const struct ip6_tnl_encap_ops __rcu * ip6tun_encaps[MAX_IPTUN_ENCAP_OPS]; int ip6_tnl_encap_add_ops(const struct ip6_tnl_encap_ops *ops, unsigned int num); int ip6_tnl_encap_del_ops(const struct ip6_tnl_encap_ops *ops, unsigned int num); int ip6_tnl_encap_setup(struct ip6_tnl *t, struct ip_tunnel_encap *ipencap); static inline int ip6_encap_hlen(struct ip_tunnel_encap *e) { const struct ip6_tnl_encap_ops *ops; int hlen = -EINVAL; if (e->type == TUNNEL_ENCAP_NONE) return 0; if (e->type >= MAX_IPTUN_ENCAP_OPS) return -EINVAL; rcu_read_lock(); ops = rcu_dereference(ip6tun_encaps[e->type]); if (likely(ops && ops->encap_hlen)) hlen = ops->encap_hlen(e); rcu_read_unlock(); return hlen; } static inline int ip6_tnl_encap(struct sk_buff *skb, struct ip6_tnl *t, u8 *protocol, struct flowi6 *fl6) { const struct ip6_tnl_encap_ops *ops; int ret = -EINVAL; if (t->encap.type == TUNNEL_ENCAP_NONE) return 0; if (t->encap.type >= MAX_IPTUN_ENCAP_OPS) return -EINVAL; rcu_read_lock(); ops = rcu_dereference(ip6tun_encaps[t->encap.type]); if (likely(ops && ops->build_header)) ret = ops->build_header(skb, &t->encap, protocol, fl6); rcu_read_unlock(); return ret; } /* Tunnel encapsulation limit destination sub-option */ struct ipv6_tlv_tnl_enc_lim { __u8 type; /* type-code for option */ __u8 length; /* option length */ __u8 encap_limit; /* tunnel encapsulation limit */ } __packed; int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, const struct in6_addr *raddr); int ip6_tnl_rcv(struct ip6_tnl *tunnel, struct sk_buff *skb, const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, bool log_ecn_error); int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, const struct in6_addr *raddr); int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield, struct flowi6 *fl6, int encap_limit, __u32 *pmtu, __u8 proto); __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw); __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr, const struct in6_addr *raddr); struct net *ip6_tnl_get_link_net(const struct net_device *dev); int ip6_tnl_get_iflink(const struct net_device *dev); int ip6_tnl_change_mtu(struct net_device *dev, int new_mtu); static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb, struct net_device *dev) { int pkt_len, err; memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); pkt_len = skb->len - skb_inner_network_offset(skb); err = ip6_local_out(dev_net(skb_dst(skb)->dev), sk, skb); if (unlikely(net_xmit_eval(err))) pkt_len = -1; iptunnel_xmit_stats(dev, pkt_len); } #endif #endif >
authorJohan Hovold <johan@kernel.org>2017-01-30 11:26:38 +0100
committerJiri Kosina <jkosina@suse.cz>2017-01-31 12:59:32 +0100
commit7a7b5df84b6b4e5d599c7289526eed96541a0654 (patch)
treecf7514c7ddf4410fe37ca9099a2785e1cf08fa7d /include/net/ip6_checksum.h
parent877a021e08ccb6434718c0cc781fdf943c884cc0 (diff)
HID: cp2112: fix sleep-while-atomic
A recent commit fixing DMA-buffers on stack added a shared transfer buffer protected by a spinlock. This is broken as the USB HID request callbacks can sleep. Fix this up by replacing the spinlock with a mutex. Fixes: 1ffb3c40ffb5 ("HID: cp2112: make transfer buffers DMA capable") Cc: stable <stable@vger.kernel.org> # 4.9 Signed-off-by: Johan Hovold <johan@kernel.org> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include/net/ip6_checksum.h')