1 #ifndef _RDMA_NETLINK_H
2 #define _RDMA_NETLINK_H
5 #include <linux/netlink.h>
6 #include <uapi/rdma/rdma_netlink.h>
9 int (*doit)(struct sk_buff *skb, struct nlmsghdr *nlh,
10 struct netlink_ext_ack *extack);
11 int (*dump)(struct sk_buff *skb, struct netlink_callback *nlcb);
16 /* Require CAP_NET_ADMIN */
17 RDMA_NL_ADMIN_PERM = 1 << 0,
20 /* Define this module as providing netlink services for NETLINK_RDMA, with
21 * index _index. Since the client indexes were setup in a uapi header as an
22 * enum and we do no want to change that, the user must supply the expanded
23 * constant as well and the compiler checks they are the same.
25 #define MODULE_ALIAS_RDMA_NETLINK(_index, _val) \
26 static inline void __chk_##_index(void) \
28 BUILD_BUG_ON(_index != _val); \
30 MODULE_ALIAS("rdma-netlink-subsys-" __stringify(_val))
33 * Register client in RDMA netlink.
34 * @index: Index of the added client
35 * @cb_table: A table for op->callback
37 void rdma_nl_register(unsigned int index,
38 const struct rdma_nl_cbs cb_table[]);
41 * Remove a client from IB netlink.
42 * @index: Index of the removed IB client.
44 void rdma_nl_unregister(unsigned int index);
47 * Put a new message in a supplied skb.
48 * @skb: The netlink skb.
49 * @nlh: Pointer to put the header of the new netlink message.
50 * @seq: The message sequence number.
51 * @len: The requested message length to allocate.
52 * @client: Calling IB netlink client.
53 * @op: message content op.
54 * Returns the allocated buffer on success and NULL on failure.
56 void *ibnl_put_msg(struct sk_buff *skb, struct nlmsghdr **nlh, int seq,
57 int len, int client, int op, int flags);
59 * Put a new attribute in a supplied skb.
60 * @skb: The netlink skb.
61 * @nlh: Header of the netlink message to append the attribute to.
62 * @len: The length of the attribute data.
63 * @data: The attribute data to put.
64 * @type: The attribute type.
65 * Returns the 0 and a negative error code on failure.
67 int ibnl_put_attr(struct sk_buff *skb, struct nlmsghdr *nlh,
68 int len, void *data, int type);
71 * Send the supplied skb to a specific userspace PID.
72 * @skb: The netlink skb
73 * @pid: Userspace netlink process ID
74 * Returns 0 on success or a negative error code.
76 int rdma_nl_unicast(struct sk_buff *skb, u32 pid);
79 * Send, with wait/1 retry, the supplied skb to a specific userspace PID.
80 * @skb: The netlink skb
81 * @pid: Userspace netlink process ID
82 * Returns 0 on success or a negative error code.
84 int rdma_nl_unicast_wait(struct sk_buff *skb, __u32 pid);
87 * Send the supplied skb to a netlink group.
88 * @skb: The netlink skb
89 * @group: Netlink group ID
90 * @flags: allocation flags
91 * Returns 0 on success or a negative error code.
93 int rdma_nl_multicast(struct sk_buff *skb, unsigned int group, gfp_t flags);
96 * Check if there are any listeners to the netlink group
97 * @group: the netlink group ID
98 * Returns 0 on success or a negative for no listeners.
100 int rdma_nl_chk_listeners(unsigned int group);
101 #endif /* _RDMA_NETLINK_H */