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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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753f618ae0
Add callbacks and data types for statistics export of all current
devices/ids. The schema for RDMA CM is a series of netlink messages.
Each one contains an rdma_cm_stat struct. Additionally, two netlink
attributes are created for the addresses for each message (if
applicable).
Their types used are:
RDMA_NL_RDMA_CM_ATTR_SRC_ADDR (The source address for this ID)
RDMA_NL_RDMA_CM_ATTR_DST_ADDR (The destination address for this ID)
sockaddr_* structs are encapsulated within these attributes.
In other words, every transaction contains a series of messages like:
-------message 1-------
struct rdma_cm_id_stats {
__u32 qp_num;
__u32 bound_dev_if;
__u32 port_space;
__s32 pid;
__u8 cm_state;
__u8 node_type;
__u8 port_num;
__u8 reserved;
}
RDMA_NL_RDMA_CM_ATTR_SRC_ADDR attribute - contains the source address
RDMA_NL_RDMA_CM_ATTR_DST_ADDR attribute - contains the destination address
-------end 1-------
-------message 2-------
struct rdma_cm_id_stats
RDMA_NL_RDMA_CM_ATTR_SRC_ADDR attribute
RDMA_NL_RDMA_CM_ATTR_DST_ADDR attribute
-------end 2-------
Signed-off-by: Nir Muchtar <nirm@voltaire.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
#ifndef _RDMA_NETLINK_H
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#define _RDMA_NETLINK_H
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#include <linux/types.h>
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enum {
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RDMA_NL_RDMA_CM = 1
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};
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#define RDMA_NL_GET_CLIENT(type) ((type & (((1 << 6) - 1) << 10)) >> 10)
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#define RDMA_NL_GET_OP(type) (type & ((1 << 10) - 1))
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#define RDMA_NL_GET_TYPE(client, op) ((client << 10) + op)
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enum {
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RDMA_NL_RDMA_CM_ID_STATS = 0,
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RDMA_NL_RDMA_CM_NUM_OPS
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};
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enum {
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RDMA_NL_RDMA_CM_ATTR_SRC_ADDR = 1,
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RDMA_NL_RDMA_CM_ATTR_DST_ADDR,
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RDMA_NL_RDMA_CM_NUM_ATTR,
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};
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struct rdma_cm_id_stats {
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__u32 qp_num;
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__u32 bound_dev_if;
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__u32 port_space;
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__s32 pid;
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__u8 cm_state;
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__u8 node_type;
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__u8 port_num;
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__u8 qp_type;
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};
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#ifdef __KERNEL__
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#include <linux/netlink.h>
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struct ibnl_client_cbs {
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int (*dump)(struct sk_buff *skb, struct netlink_callback *nlcb);
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};
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int ibnl_init(void);
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void ibnl_cleanup(void);
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/**
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* Add a a client to the list of IB netlink exporters.
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* @index: Index of the added client
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* @nops: Number of supported ops by the added client.
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* @cb_table: A table for op->callback
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*
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* Returns 0 on success or a negative error code.
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*/
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int ibnl_add_client(int index, int nops,
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const struct ibnl_client_cbs cb_table[]);
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/**
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* Remove a client from IB netlink.
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* @index: Index of the removed IB client.
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*
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* Returns 0 on success or a negative error code.
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*/
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int ibnl_remove_client(int index);
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/**
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* Put a new message in a supplied skb.
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* @skb: The netlink skb.
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* @nlh: Pointer to put the header of the new netlink message.
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* @seq: The message sequence number.
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* @len: The requested message length to allocate.
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* @client: Calling IB netlink client.
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* @op: message content op.
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* Returns the allocated buffer on success and NULL on failure.
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*/
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void *ibnl_put_msg(struct sk_buff *skb, struct nlmsghdr **nlh, int seq,
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int len, int client, int op);
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/**
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* Put a new attribute in a supplied skb.
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* @skb: The netlink skb.
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* @nlh: Header of the netlink message to append the attribute to.
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* @len: The length of the attribute data.
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* @data: The attribute data to put.
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* @type: The attribute type.
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* Returns the 0 and a negative error code on failure.
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*/
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int ibnl_put_attr(struct sk_buff *skb, struct nlmsghdr *nlh,
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int len, void *data, int type);
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#endif /* __KERNEL__ */
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#endif /* _RDMA_NETLINK_H */
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