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author | Roland Dreier <roland@purestorage.com> | 2011-05-20 11:46:11 -0700 |
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committer | Roland Dreier <roland@purestorage.com> | 2011-05-20 11:46:11 -0700 |
commit | b2cbae2c248776d81cc265ff7d48405b6a4cc463 (patch) | |
tree | fbd4f4e0812fbcc991670c81967e90bfdd9f80c0 /include/rdma | |
parent | fd75c789abf7948e16fe50917a6acb809927719a (diff) | |
download | lwn-b2cbae2c248776d81cc265ff7d48405b6a4cc463.tar.gz lwn-b2cbae2c248776d81cc265ff7d48405b6a4cc463.zip |
RDMA: Add netlink infrastructure
Add basic RDMA netlink infrastructure that allows for registration of
RDMA clients for which data is to be exported and supplies message
construction callbacks.
Signed-off-by: Nir Muchtar <nirm@voltaire.com>
[ Reorganize a few things, add CONFIG_NET dependency. - Roland ]
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'include/rdma')
-rw-r--r-- | include/rdma/rdma_netlink.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/include/rdma/rdma_netlink.h b/include/rdma/rdma_netlink.h new file mode 100644 index 000000000000..c983a193cecf --- /dev/null +++ b/include/rdma/rdma_netlink.h @@ -0,0 +1,64 @@ +#ifndef _RDMA_NETLINK_H +#define _RDMA_NETLINK_H + +#define RDMA_NL_GET_CLIENT(type) ((type & (((1 << 6) - 1) << 10)) >> 10) +#define RDMA_NL_GET_OP(type) (type & ((1 << 10) - 1)) +#define RDMA_NL_GET_TYPE(client, op) ((client << 10) + op) + +#ifdef __KERNEL__ + +#include <linux/netlink.h> + +struct ibnl_client_cbs { + int (*dump)(struct sk_buff *skb, struct netlink_callback *nlcb); +}; + +int ibnl_init(void); +void ibnl_cleanup(void); + +/** + * Add a a client to the list of IB netlink exporters. + * @index: Index of the added client + * @nops: Number of supported ops by the added client. + * @cb_table: A table for op->callback + * + * Returns 0 on success or a negative error code. + */ +int ibnl_add_client(int index, int nops, + const struct ibnl_client_cbs cb_table[]); + +/** + * Remove a client from IB netlink. + * @index: Index of the removed IB client. + * + * Returns 0 on success or a negative error code. + */ +int ibnl_remove_client(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); +/** + * 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); + +#endif /* __KERNEL__ */ + +#endif /* _RDMA_NETLINK_H */ |