cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

rdma_netlink.h (4062B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2
      3#ifndef _RDMA_NETLINK_H
      4#define _RDMA_NETLINK_H
      5
      6#include <linux/netlink.h>
      7#include <uapi/rdma/rdma_netlink.h>
      8
      9enum {
     10	RDMA_NLDEV_ATTR_EMPTY_STRING = 1,
     11	RDMA_NLDEV_ATTR_ENTRY_STRLEN = 16,
     12	RDMA_NLDEV_ATTR_CHARDEV_TYPE_SIZE = 32,
     13};
     14
     15struct rdma_nl_cbs {
     16	int (*doit)(struct sk_buff *skb, struct nlmsghdr *nlh,
     17		    struct netlink_ext_ack *extack);
     18	int (*dump)(struct sk_buff *skb, struct netlink_callback *nlcb);
     19	u8 flags;
     20};
     21
     22enum rdma_nl_flags {
     23	/* Require CAP_NET_ADMIN */
     24	RDMA_NL_ADMIN_PERM	= 1 << 0,
     25};
     26
     27/* Define this module as providing netlink services for NETLINK_RDMA, with
     28 * index _index.  Since the client indexes were setup in a uapi header as an
     29 * enum and we do no want to change that, the user must supply the expanded
     30 * constant as well and the compiler checks they are the same.
     31 */
     32#define MODULE_ALIAS_RDMA_NETLINK(_index, _val)                                \
     33	static inline void __maybe_unused __chk_##_index(void)                 \
     34	{                                                                      \
     35		BUILD_BUG_ON(_index != _val);                                  \
     36	}                                                                      \
     37	MODULE_ALIAS("rdma-netlink-subsys-" __stringify(_val))
     38
     39/**
     40 * Register client in RDMA netlink.
     41 * @index: Index of the added client
     42 * @cb_table: A table for op->callback
     43 */
     44void rdma_nl_register(unsigned int index,
     45		      const struct rdma_nl_cbs cb_table[]);
     46
     47/**
     48 * Remove a client from IB netlink.
     49 * @index: Index of the removed IB client.
     50 */
     51void rdma_nl_unregister(unsigned int index);
     52
     53/**
     54 * Put a new message in a supplied skb.
     55 * @skb: The netlink skb.
     56 * @nlh: Pointer to put the header of the new netlink message.
     57 * @seq: The message sequence number.
     58 * @len: The requested message length to allocate.
     59 * @client: Calling IB netlink client.
     60 * @op: message content op.
     61 * Returns the allocated buffer on success and NULL on failure.
     62 */
     63void *ibnl_put_msg(struct sk_buff *skb, struct nlmsghdr **nlh, int seq,
     64		   int len, int client, int op, int flags);
     65/**
     66 * Put a new attribute in a supplied skb.
     67 * @skb: The netlink skb.
     68 * @nlh: Header of the netlink message to append the attribute to.
     69 * @len: The length of the attribute data.
     70 * @data: The attribute data to put.
     71 * @type: The attribute type.
     72 * Returns the 0 and a negative error code on failure.
     73 */
     74int ibnl_put_attr(struct sk_buff *skb, struct nlmsghdr *nlh,
     75		  int len, void *data, int type);
     76
     77/**
     78 * Send the supplied skb to a specific userspace PID.
     79 * @net: Net namespace in which to send the skb
     80 * @skb: The netlink skb
     81 * @pid: Userspace netlink process ID
     82 * Returns 0 on success or a negative error code.
     83 */
     84int rdma_nl_unicast(struct net *net, struct sk_buff *skb, u32 pid);
     85
     86/**
     87 * Send, with wait/1 retry, the supplied skb to a specific userspace PID.
     88 * @net: Net namespace in which to send the skb
     89 * @skb: The netlink skb
     90 * @pid: Userspace netlink process ID
     91 * Returns 0 on success or a negative error code.
     92 */
     93int rdma_nl_unicast_wait(struct net *net, struct sk_buff *skb, __u32 pid);
     94
     95/**
     96 * Send the supplied skb to a netlink group.
     97 * @net: Net namespace in which to send the skb
     98 * @skb: The netlink skb
     99 * @group: Netlink group ID
    100 * @flags: allocation flags
    101 * Returns 0 on success or a negative error code.
    102 */
    103int rdma_nl_multicast(struct net *net, struct sk_buff *skb,
    104		      unsigned int group, gfp_t flags);
    105
    106/**
    107 * Check if there are any listeners to the netlink group
    108 * @group: the netlink group ID
    109 * Returns true on success or false if no listeners.
    110 */
    111bool rdma_nl_chk_listeners(unsigned int group);
    112
    113struct rdma_link_ops {
    114	struct list_head list;
    115	const char *type;
    116	int (*newlink)(const char *ibdev_name, struct net_device *ndev);
    117};
    118
    119void rdma_link_register(struct rdma_link_ops *ops);
    120void rdma_link_unregister(struct rdma_link_ops *ops);
    121
    122#define MODULE_ALIAS_RDMA_LINK(type) MODULE_ALIAS("rdma-link-" type)
    123#define MODULE_ALIAS_RDMA_CLIENT(type) MODULE_ALIAS("rdma-client-" type)
    124
    125#endif /* _RDMA_NETLINK_H */