| 1 |
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| 2 |
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| 3 | #ifndef _RDMA_NETLINK_H
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| 4 | #define _RDMA_NETLINK_H
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| 5 |
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| 6 | #include <linux/netlink.h>
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| 7 | #include <uapi/rdma/rdma_netlink.h>
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| 8 | #include <rdma/ib_verbs.h>
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| 9 |
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| 10 | struct ib_device;
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| 11 |
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| 12 | enum {
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| 13 | RDMA_NLDEV_ATTR_EMPTY_STRING = 1,
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| 14 | RDMA_NLDEV_ATTR_ENTRY_STRLEN = 16,
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| 15 | RDMA_NLDEV_ATTR_CHARDEV_TYPE_SIZE = 32,
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| 16 | };
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| 17 |
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| 18 | struct rdma_nl_cbs {
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| 19 | int (*doit)(struct sk_buff *skb, struct nlmsghdr *nlh,
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| 20 | struct netlink_ext_ack *extack);
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| 21 | int (*dump)(struct sk_buff *skb, struct netlink_callback *nlcb);
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| 22 | u8 flags;
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| 23 | };
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| 24 |
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| 25 | enum rdma_nl_flags {
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| 26 |
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| 27 | RDMA_NL_ADMIN_PERM = 1 << 0,
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| 28 | };
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| 29 |
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| 30 | |
| 31 | * index _index. Since the client indexes were setup in a uapi header as an
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| 32 | * enum and we do no want to change that, the user must supply the expanded
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| 33 | * constant as well and the compiler checks they are the same.
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| 34 |
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| 35 | #define MODULE_ALIAS_RDMA_NETLINK(_index, _val) \
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| 36 | static inline void __maybe_unused __chk_##_index(void) \
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| 37 | { \
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| 38 | BUILD_BUG_ON(_index != _val); \
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| 39 | } \
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| 40 | MODULE_ALIAS("rdma-netlink-subsys-" __stringify(_val))
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| 41 |
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| 42 | |
| 43 | * Register client in RDMA netlink.
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| 44 | * @index: Index of the added client
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| 45 | * @cb_table: A table for op->callback
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| 46 |
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| 47 | void rdma_nl_register(unsigned int index,
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| 48 | const struct rdma_nl_cbs cb_table[]);
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| 49 |
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| 50 | |
| 51 | * Remove a client from IB netlink.
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| 52 | * @index: Index of the removed IB client.
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| 53 |
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| 54 | void rdma_nl_unregister(unsigned int index);
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| 55 |
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| 56 | |
| 57 | * Put a new message in a supplied skb.
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| 58 | * @skb: The netlink skb.
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| 59 | * @nlh: Pointer to put the header of the new netlink message.
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| 60 | * @seq: The message sequence number.
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| 61 | * @len: The requested message length to allocate.
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| 62 | * @client: Calling IB netlink client.
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| 63 | * @op: message content op.
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| 64 | * Returns the allocated buffer on success and NULL on failure.
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| 65 |
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| 66 | void *ibnl_put_msg(struct sk_buff *skb, struct nlmsghdr **nlh, int seq,
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| 67 | int len, int client, int op, int flags);
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| 68 | |
| 69 | * Put a new attribute in a supplied skb.
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| 70 | * @skb: The netlink skb.
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| 71 | * @nlh: Header of the netlink message to append the attribute to.
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| 72 | * @len: The length of the attribute data.
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| 73 | * @data: The attribute data to put.
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| 74 | * @type: The attribute type.
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| 75 | * Returns the 0 and a negative error code on failure.
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| 76 |
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| 77 | int ibnl_put_attr(struct sk_buff *skb, struct nlmsghdr *nlh,
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| 78 | int len, void *data, int type);
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| 79 |
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| 80 | |
| 81 | * Send the supplied skb to a specific userspace PID.
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| 82 | * @net: Net namespace in which to send the skb
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| 83 | * @skb: The netlink skb
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| 84 | * @pid: Userspace netlink process ID
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| 85 | * Returns 0 on success or a negative error code.
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| 86 |
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| 87 | int rdma_nl_unicast(struct net *net, struct sk_buff *skb, u32 pid);
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| 88 |
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| 89 | |
| 90 | * Send, with wait/1 retry, the supplied skb to a specific userspace PID.
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| 91 | * @net: Net namespace in which to send the skb
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| 92 | * @skb: The netlink skb
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| 93 | * @pid: Userspace netlink process ID
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| 94 | * Returns 0 on success or a negative error code.
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| 95 |
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| 96 | int rdma_nl_unicast_wait(struct net *net, struct sk_buff *skb, __u32 pid);
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| 97 |
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| 98 | |
| 99 | * Send the supplied skb to a netlink group.
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| 100 | * @net: Net namespace in which to send the skb
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| 101 | * @skb: The netlink skb
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| 102 | * @group: Netlink group ID
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| 103 | * @flags: allocation flags
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| 104 | * Returns 0 on success or a negative error code.
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| 105 |
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| 106 | int rdma_nl_multicast(struct net *net, struct sk_buff *skb,
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| 107 | unsigned int group, gfp_t flags);
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| 108 |
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| 109 | |
| 110 | * Check if there are any listeners to the netlink group
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| 111 | * @group: the netlink group ID
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| 112 | * Returns true on success or false if no listeners.
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| 113 |
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| 114 | bool rdma_nl_chk_listeners(unsigned int group);
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| 115 |
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| 116 | |
| 117 | * Prepare and send an event message
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| 118 | * @ib: the IB device which triggered the event
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| 119 | * @port_num: the port number which triggered the event - 0 if unused
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| 120 | * @type: the event type
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| 121 | * Returns 0 on success or a negative error code
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| 122 |
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| 123 | int rdma_nl_notify_event(struct ib_device *ib, u32 port_num,
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| 124 | enum rdma_nl_notify_event_type type);
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| 125 |
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| 126 | struct rdma_link_ops {
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| 127 | struct list_head list;
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| 128 | const char *type;
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| 129 | int (*newlink)(const char *ibdev_name, struct net_device *ndev);
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| 130 | int (*dellink)(struct ib_device *dev);
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| 131 | };
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| 132 |
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| 133 | void rdma_link_register(struct rdma_link_ops *ops);
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| 134 | void rdma_link_unregister(struct rdma_link_ops *ops);
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| 135 |
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| 136 | #define MODULE_ALIAS_RDMA_LINK(type) MODULE_ALIAS("rdma-link-" type)
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| 137 | #define MODULE_ALIAS_RDMA_CLIENT(type) MODULE_ALIAS("rdma-client-" type)
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| 138 |
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| 139 | #endif
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