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125 lines
4.0 KiB
125 lines
4.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#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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enum { |
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RDMA_NLDEV_ATTR_EMPTY_STRING = 1, |
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RDMA_NLDEV_ATTR_ENTRY_STRLEN = 16, |
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RDMA_NLDEV_ATTR_CHARDEV_TYPE_SIZE = 32, |
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}; |
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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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/* Define this module as providing netlink services for NETLINK_RDMA, with |
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* index _index. Since the client indexes were setup in a uapi header as an |
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* enum and we do no want to change that, the user must supply the expanded |
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* constant as well and the compiler checks they are the same. |
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*/ |
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#define MODULE_ALIAS_RDMA_NETLINK(_index, _val) \ |
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static inline void __chk_##_index(void) \ |
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{ \ |
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BUILD_BUG_ON(_index != _val); \ |
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} \ |
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MODULE_ALIAS("rdma-netlink-subsys-" __stringify(_val)) |
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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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* @net: Net namespace in which to send the skb |
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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 net *net, 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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* @net: Net namespace in which to send the skb |
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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 net *net, 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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* @net: Net namespace in which to send the skb |
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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 net *net, struct sk_buff *skb, |
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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 true on success or false if no listeners. |
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*/ |
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bool rdma_nl_chk_listeners(unsigned int group); |
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struct rdma_link_ops { |
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struct list_head list; |
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const char *type; |
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int (*newlink)(const char *ibdev_name, struct net_device *ndev); |
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}; |
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void rdma_link_register(struct rdma_link_ops *ops); |
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void rdma_link_unregister(struct rdma_link_ops *ops); |
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#define MODULE_ALIAS_RDMA_LINK(type) MODULE_ALIAS("rdma-link-" type) |
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#define MODULE_ALIAS_RDMA_CLIENT(type) MODULE_ALIAS("rdma-client-" type) |
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#endif /* _RDMA_NETLINK_H */
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