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/*
 * describes a network:
 *  nw_id: can be the base network name, ex: o2ib or a full network id, ex: o2ib3.
 *  nw_expr: an expression to describe the variable part of the network ID
 *           ex: tcp* - all tcp networks
 *           ex: tcp[1-5] - resolves to tcp1, tcp2, tcp3, tcp4 and tcp5.
 */
struct lustre_lnet_network_descr {
	__u32 nw_id;
    struct cfs_expr_list *nw_expr;
};
 
/*
 * lustre_lnet_network_rule
 *   network rule
 *      nwr_link - link on rule list
 *      nwr_descr - network descriptor
 *      priority - priority of the rule.
 */
struct lustre_lnet_network_rule {
	struct list_head *nwr_link;
	struct lustre_lnet_network_descr nwr_descr;
	int priority;
};
 
/*
 * lustre_lnet_nid_range_descr
 *   nidr_expr - expression describing the IP part of the NID
 *   nidr_nw - a description of the network
 */
struct lustre_lnet_nidr_range_descr {
	struct list_head nidr_expr;
    struct lustre_lnet_network_descr nidr_nw;
};

/*
 * lustre_lnet_nidr_range_rule
 *  Rule for the nid range.
 *     nidr_link - link on the rule list
 *     nidr_descr - descriptor of the nid range
 *     priority - priority of the rule
 */
struct lustre_lnet_nidr_range_rule {
    struct list_head *nidr_link;
	struct lustre_lnet_nidr_range_descr nidr_descr;
	int priority;
};

/*
 * lustre_lnet_p2p_rule
 *  Rule for the peer to peer.
 *     p2p_link - link on the rule list
 *     p2p_src_descr - source nid range
 *     p2p_dst_descr - destination nid range
 *     priority - priority of the rule
 */
struct lustre_lnet_p2p_rule {
    struct list_head *p2p_link;
	struct lustre_lnet_nidr_range_descr p2p_src_descr;
	struct lustre_lnet_nidr_range_descr p2p_dst_descr;
	int priority;
};

enum lnet_sel_rule_type {
	LNET_SEL_RULE_NET = 0,
	LNET_SEL_RULE_NID,
	LNET_SEL_RULE_P2P
};
 
struct lnet_expr {
	__u32 ex_lo;
	__u32 ex_hi;
	__u32 ex_stride;	
};
 
struct lnet_net_descr {
	__u32 nsd_net_id;
	struct lnet_expr nsd_expr;
};
 
struct lnet_nid_descr {
	struct lnet_expr nir_ip[4];
	struct lnet_net_descr nir_net;
};
 
struct lnet_ioctl_net_rule {
	struct lnet_net_descr nsr_descr
	__u32 nsr_prio;
};


struct lnet_ioctl_nid_rule {
	struct lnet_nid_descr nir_descr;
	__32 nir_prio
};
 
sturct lnet_ioctl_net_p2p_rule {
	struct lnet_nid_descr p2p_src_descr;
	struct lnet_nid_descr p2p_dst_descr;
	__u32 p2p_prio;
};
 
/* 
 * lnet_ioctl_rule_blk
 *  describes a set of rules of the same type to transfer to the kernel.
 *		rule_hdr - header information describing the total size of the transfer
 * 		rule_type - type of rules included
 * 		rule_size - size of each individual rule. Can be used to check backwards compatibility
 * 		rule_bulk - pointer to the user space allocated memory containing the rules.
 */
struct lnet_ioctl_rule_blk {
	struct libcfs_ioctl_hdr rule_hdr;
	enum lnet_sel_rule_type rule_type;
    __u32 rule_size;
	void *rule_bulk;
};