forked from Minki/linux
83dde7498f
Like other commits in the tree add __maybe_unused to a static inline in a
C file because some clang compilers will complain about unused code:
>> drivers/infiniband/core/nldev.c:2543:1: warning: unused function '__chk_RDMA_NL_NLDEV'
MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_NLDEV, 5);
^
Fixes: e3bf14bdc1 ("rdma: Autoload netlink client modules")
Link: https://lore.kernel.org/r/4a8101919b765e01d7fde6f27fd572c958deeb4a.1636267207.git.leonro@nvidia.com
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
126 lines
4.0 KiB
C
126 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#ifndef _RDMA_NETLINK_H
|
|
#define _RDMA_NETLINK_H
|
|
|
|
#include <linux/netlink.h>
|
|
#include <uapi/rdma/rdma_netlink.h>
|
|
|
|
enum {
|
|
RDMA_NLDEV_ATTR_EMPTY_STRING = 1,
|
|
RDMA_NLDEV_ATTR_ENTRY_STRLEN = 16,
|
|
RDMA_NLDEV_ATTR_CHARDEV_TYPE_SIZE = 32,
|
|
};
|
|
|
|
struct rdma_nl_cbs {
|
|
int (*doit)(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct netlink_ext_ack *extack);
|
|
int (*dump)(struct sk_buff *skb, struct netlink_callback *nlcb);
|
|
u8 flags;
|
|
};
|
|
|
|
enum rdma_nl_flags {
|
|
/* Require CAP_NET_ADMIN */
|
|
RDMA_NL_ADMIN_PERM = 1 << 0,
|
|
};
|
|
|
|
/* Define this module as providing netlink services for NETLINK_RDMA, with
|
|
* index _index. Since the client indexes were setup in a uapi header as an
|
|
* enum and we do no want to change that, the user must supply the expanded
|
|
* constant as well and the compiler checks they are the same.
|
|
*/
|
|
#define MODULE_ALIAS_RDMA_NETLINK(_index, _val) \
|
|
static inline void __maybe_unused __chk_##_index(void) \
|
|
{ \
|
|
BUILD_BUG_ON(_index != _val); \
|
|
} \
|
|
MODULE_ALIAS("rdma-netlink-subsys-" __stringify(_val))
|
|
|
|
/**
|
|
* Register client in RDMA netlink.
|
|
* @index: Index of the added client
|
|
* @cb_table: A table for op->callback
|
|
*/
|
|
void rdma_nl_register(unsigned int index,
|
|
const struct rdma_nl_cbs cb_table[]);
|
|
|
|
/**
|
|
* Remove a client from IB netlink.
|
|
* @index: Index of the removed IB client.
|
|
*/
|
|
void rdma_nl_unregister(unsigned int index);
|
|
|
|
/**
|
|
* Put a new message in a supplied skb.
|
|
* @skb: The netlink skb.
|
|
* @nlh: Pointer to put the header of the new netlink message.
|
|
* @seq: The message sequence number.
|
|
* @len: The requested message length to allocate.
|
|
* @client: Calling IB netlink client.
|
|
* @op: message content op.
|
|
* Returns the allocated buffer on success and NULL on failure.
|
|
*/
|
|
void *ibnl_put_msg(struct sk_buff *skb, struct nlmsghdr **nlh, int seq,
|
|
int len, int client, int op, int flags);
|
|
/**
|
|
* Put a new attribute in a supplied skb.
|
|
* @skb: The netlink skb.
|
|
* @nlh: Header of the netlink message to append the attribute to.
|
|
* @len: The length of the attribute data.
|
|
* @data: The attribute data to put.
|
|
* @type: The attribute type.
|
|
* Returns the 0 and a negative error code on failure.
|
|
*/
|
|
int ibnl_put_attr(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
int len, void *data, int type);
|
|
|
|
/**
|
|
* Send the supplied skb to a specific userspace PID.
|
|
* @net: Net namespace in which to send the skb
|
|
* @skb: The netlink skb
|
|
* @pid: Userspace netlink process ID
|
|
* Returns 0 on success or a negative error code.
|
|
*/
|
|
int rdma_nl_unicast(struct net *net, struct sk_buff *skb, u32 pid);
|
|
|
|
/**
|
|
* Send, with wait/1 retry, the supplied skb to a specific userspace PID.
|
|
* @net: Net namespace in which to send the skb
|
|
* @skb: The netlink skb
|
|
* @pid: Userspace netlink process ID
|
|
* Returns 0 on success or a negative error code.
|
|
*/
|
|
int rdma_nl_unicast_wait(struct net *net, struct sk_buff *skb, __u32 pid);
|
|
|
|
/**
|
|
* Send the supplied skb to a netlink group.
|
|
* @net: Net namespace in which to send the skb
|
|
* @skb: The netlink skb
|
|
* @group: Netlink group ID
|
|
* @flags: allocation flags
|
|
* Returns 0 on success or a negative error code.
|
|
*/
|
|
int rdma_nl_multicast(struct net *net, struct sk_buff *skb,
|
|
unsigned int group, gfp_t flags);
|
|
|
|
/**
|
|
* Check if there are any listeners to the netlink group
|
|
* @group: the netlink group ID
|
|
* Returns true on success or false if no listeners.
|
|
*/
|
|
bool rdma_nl_chk_listeners(unsigned int group);
|
|
|
|
struct rdma_link_ops {
|
|
struct list_head list;
|
|
const char *type;
|
|
int (*newlink)(const char *ibdev_name, struct net_device *ndev);
|
|
};
|
|
|
|
void rdma_link_register(struct rdma_link_ops *ops);
|
|
void rdma_link_unregister(struct rdma_link_ops *ops);
|
|
|
|
#define MODULE_ALIAS_RDMA_LINK(type) MODULE_ALIAS("rdma-link-" type)
|
|
#define MODULE_ALIAS_RDMA_CLIENT(type) MODULE_ALIAS("rdma-client-" type)
|
|
|
|
#endif /* _RDMA_NETLINK_H */
|