diff options
Diffstat (limited to 'include/net/mctp.h')
| -rw-r--r-- | include/net/mctp.h | 88 |
1 files changed, 73 insertions, 15 deletions
diff --git a/include/net/mctp.h b/include/net/mctp.h index 82800d521c3d..c3207ce98f07 100644 --- a/include/net/mctp.h +++ b/include/net/mctp.h @@ -69,7 +69,10 @@ struct mctp_sock { /* bind() params */ unsigned int bind_net; - mctp_eid_t bind_addr; + mctp_eid_t bind_local_addr; + mctp_eid_t bind_peer_addr; + unsigned int bind_peer_net; + bool bind_peer_set; __u8 bind_type; /* sendmsg()/recvmsg() uses struct sockaddr_mctp_ext */ @@ -87,7 +90,7 @@ struct mctp_sock { }; /* Key for matching incoming packets to sockets or reassembly contexts. - * Packets are matched on (src,dest,tag). + * Packets are matched on (peer EID, local EID, tag). * * Lifetime / locking requirements: * @@ -133,6 +136,7 @@ struct mctp_sock { * - through an expiry timeout, on a per-socket timer */ struct mctp_sk_key { + unsigned int net; mctp_eid_t peer_addr; mctp_eid_t local_addr; /* MCTP_ADDR_ANY for local owned tags */ __u8 tag; /* incoming tag match; invert TO for local */ @@ -182,8 +186,8 @@ struct mctp_sk_key { struct mctp_skb_cb { unsigned int magic; unsigned int net; - int ifindex; /* extended/direct addressing if set */ - mctp_eid_t src; + /* fields below provide extended addressing for ingress to recvmsg() */ + int ifindex; unsigned char halen; unsigned char haddr[MAX_ADDR_LEN]; }; @@ -211,7 +215,7 @@ static inline struct mctp_skb_cb *mctp_cb(struct sk_buff *skb) BUILD_BUG_ON(sizeof(struct mctp_skb_cb) > sizeof(skb->cb)); WARN_ON(cb->magic != 0x4d435450); - return (void *)(skb->cb); + return cb; } /* If CONFIG_MCTP_FLOWS, we may add one of these as a SKB extension, @@ -221,6 +225,8 @@ struct mctp_flow { struct mctp_sk_key *key; }; +struct mctp_dst; + /* Route definition. * * These are held in the pernet->mctp.routes list, with RCU protection for @@ -228,16 +234,25 @@ struct mctp_flow { * dropped on NETDEV_UNREGISTER events. * * Updates to the route table are performed under rtnl; all reads under RCU, - * so routes cannot be referenced over a RCU grace period. Specifically: A - * caller cannot block between mctp_route_lookup and mctp_route_release() + * so routes cannot be referenced over a RCU grace period. */ struct mctp_route { mctp_eid_t min, max; - struct mctp_dev *dev; - unsigned int mtu; unsigned char type; - int (*output)(struct mctp_route *route, + + unsigned int mtu; + + enum { + MCTP_ROUTE_DIRECT, + MCTP_ROUTE_GATEWAY, + } dst_type; + union { + struct mctp_dev *dev; + struct mctp_fq_addr gateway; + }; + + int (*output)(struct mctp_dst *dst, struct sk_buff *skb); struct list_head list; @@ -245,16 +260,41 @@ struct mctp_route { struct rcu_head rcu; }; +/* Route lookup result: dst. Represents the results of a routing decision, + * but is only held over the individual routing operation. + * + * Will typically be stored on the caller stack, and must be released after + * usage. + */ +struct mctp_dst { + struct mctp_dev *dev; + unsigned int mtu; + mctp_eid_t nexthop; + + /* set for direct addressing */ + unsigned char halen; + unsigned char haddr[MAX_ADDR_LEN]; + + int (*output)(struct mctp_dst *dst, struct sk_buff *skb); +}; + +int mctp_dst_from_extaddr(struct mctp_dst *dst, struct net *net, int ifindex, + unsigned char halen, const unsigned char *haddr); + /* route interfaces */ -struct mctp_route *mctp_route_lookup(struct net *net, unsigned int dnet, - mctp_eid_t daddr); +int mctp_route_lookup(struct net *net, unsigned int dnet, + mctp_eid_t daddr, struct mctp_dst *dst); + +void mctp_dst_release(struct mctp_dst *dst); -int mctp_local_output(struct sock *sk, struct mctp_route *rt, +/* always takes ownership of skb */ +int mctp_local_output(struct sock *sk, struct mctp_dst *dst, struct sk_buff *skb, mctp_eid_t daddr, u8 req_tag); void mctp_key_unref(struct mctp_sk_key *key); struct mctp_sk_key *mctp_alloc_local_tag(struct mctp_sock *msk, - mctp_eid_t daddr, mctp_eid_t saddr, + unsigned int netid, + mctp_eid_t local, mctp_eid_t peer, bool manual, u8 *tagp); /* routing <--> device interface */ @@ -292,7 +332,25 @@ void mctp_neigh_remove_dev(struct mctp_dev *mdev); int mctp_routes_init(void); void mctp_routes_exit(void); -void mctp_device_init(void); +int mctp_device_init(void); void mctp_device_exit(void); +/* MCTP IDs and Codes from DMTF specification + * "DSP0239 Management Component Transport Protocol (MCTP) IDs and Codes" + * https://www.dmtf.org/sites/default/files/standards/documents/DSP0239_1.11.1.pdf + */ +enum mctp_phys_binding { + MCTP_PHYS_BINDING_UNSPEC = 0x00, + MCTP_PHYS_BINDING_SMBUS = 0x01, + MCTP_PHYS_BINDING_PCIE_VDM = 0x02, + MCTP_PHYS_BINDING_USB = 0x03, + MCTP_PHYS_BINDING_KCS = 0x04, + MCTP_PHYS_BINDING_SERIAL = 0x05, + MCTP_PHYS_BINDING_I3C = 0x06, + MCTP_PHYS_BINDING_MMBI = 0x07, + MCTP_PHYS_BINDING_PCC = 0x08, + MCTP_PHYS_BINDING_UCIE = 0x09, + MCTP_PHYS_BINDING_VENDOR = 0xFF, +}; + #endif /* __NET_MCTP_H */ |