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Code Block
/*
 * lustre_lnet_add_net_sel_pol
 *   Add a net selection policy. If there already exists a 
 *   policy for this net it will be updated.
 *      net - Network for the selection policy
 *      priority - priority of the rule
 */
int lustre_lnet_add_net_sel_pol(char *net, int priority);
 
/*
 * lustre_lnet_del_net_sel_pol
 *   Delete a net selection policy.
 *      net - Network for the selection policy
 *      id - [OPTIONAL] ID of the policy. This can be retrieved via a show command.
 */
int lustre_lnet_del_net_sel_pol(char *net, int id);
 
/*
 * lustre_lnet_show_net_sel_pol
 *   Show configured net selection policies.
 *      net - filter on the net provided.
 */
int lustre_lnet_show_net_sel_pol(char *net);
 
/*
 * lustre_lnet_add_nid_sel_pol
 *   Add a nid selection policy. If there already exists a 
 *   policy for this nid it will be updated. NIDs can be either
 *   local NIDs or remote NIDs.
 *      nid - NID for the selection policy
 *      priority - priority of the rule
 */
int lustre_lnet_add_nid_sel_pol(char *nid, int priority);
 
/*
 * lustre_lnet_del_nid_sel_pol
 *   Delete a nid selection policy.
 *      nid - NID for the selection policy
 *      id - [OPTIONAL] ID of the policy. This can be retrieved via a show command.
 */
int lustre_lnet_del_nid_sel_pol(char *nid, int id);
 
/*
 * lustre_lnet_show_nid_sel_pol
 *   Show configured nid selection policies.
 *      nid - filter on the NID provided.
 */
int lustre_lnet_show_nid_sel_pol(char *nid);
 
/*
 * lustre_lnet_add_nid_sel_pol
 *   Add a peer to peer selection policy. If there already exists a 
 *   policy for the pair it will be updated.
 *      src_nid - source NID
 *      dst_nid - destination NID
 *      priority - priority of the rule
 */
int lustre_lnet_add_peer_sel_pol(char *src_nid, char *dst_nid, int priority);
 
/*
 * lustre_lnet_del_peer_sel_pol
 *   Delete a peer to peer selection policy.
 *      src_nid - source NID
 *      dst_nid - destination NID
 *      id - [OPTIONAL] ID of the policy. This can be retrieved via a show command.
 */
int lustre_lnet_del_peer_sel_pol(char *src_nid, char *dst_nid, int id);


/*
 * lustre_lnet_show_peer_sel_pol
 *   Show peer to peer selection policies.
 *      src_nid - [OPTIONAL] source NID. If provided the output will be filtered
 *                on this value.
 *      dst_nid - [OPTIONAL] destination NID. If provided the output will be filtered
 *                on this value.
 */
int lustre_lnet_show_peer_sel_pol(char *src_nid, char *dst_nid);


Data structures

User space/Kernel space Data structures

Code Block
/*
 * 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
 */
struct lustre_lnet_network_rule {
	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;
};
 
struct lustre_lnet_nidr_range_rule {
	struct lustre_lnet_nidr_range_descr nidr_descr;
	int priority;
};

struct lustre_lnet_p2p_rule {
	struct lustre_lnet_nidr_range_descr nidr_src_descr;
	struct lustre_lnet_nidr_range_descr nidr_dst_descr;
	int priority;
};

IOCTL Data structures

Code Block
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;
};

Serialization/Deserialization

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