1830ba21b9
The .doit callback is used by netlink core to differentiate between get and set operations. Common convention is to use that call for command operations like (SET, ADD, e.t.c.) and/or access without NLF_M_DUMP flag. This commit adds proper declaration and implementation to RDMA netlink. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com>
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
#ifndef _RDMA_NETLINK_H
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#define _RDMA_NETLINK_H
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#include <linux/netlink.h>
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#include <uapi/rdma/rdma_netlink.h>
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struct rdma_nl_cbs {
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int (*doit)(struct sk_buff *skb, struct nlmsghdr *nlh,
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struct netlink_ext_ack *extack);
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int (*dump)(struct sk_buff *skb, struct netlink_callback *nlcb);
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u8 flags;
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};
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enum rdma_nl_flags {
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/* Require CAP_NET_ADMIN */
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RDMA_NL_ADMIN_PERM = 1 << 0,
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};
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/**
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* Register client in RDMA netlink.
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* @index: Index of the added client
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* @cb_table: A table for op->callback
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*/
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void rdma_nl_register(unsigned int index,
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const struct rdma_nl_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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void rdma_nl_unregister(unsigned 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, int flags);
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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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/**
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* Send the supplied skb to a specific userspace PID.
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* @skb: The netlink skb
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* @pid: Userspace netlink process ID
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* Returns 0 on success or a negative error code.
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*/
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int rdma_nl_unicast(struct sk_buff *skb, u32 pid);
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/**
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* Send, with wait/1 retry, the supplied skb to a specific userspace PID.
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* @skb: The netlink skb
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* @pid: Userspace netlink process ID
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* Returns 0 on success or a negative error code.
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*/
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int rdma_nl_unicast_wait(struct sk_buff *skb, __u32 pid);
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/**
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* Send the supplied skb to a netlink group.
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* @skb: The netlink skb
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* @group: Netlink group ID
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* @flags: allocation flags
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* Returns 0 on success or a negative error code.
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*/
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int rdma_nl_multicast(struct sk_buff *skb, unsigned int group, gfp_t flags);
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/**
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* Check if there are any listeners to the netlink group
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* @group: the netlink group ID
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* Returns 0 on success or a negative for no listeners.
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*/
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int rdma_nl_chk_listeners(unsigned int group);
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#endif /* _RDMA_NETLINK_H */
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