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Commit a34fc089 authored by Steve Wise's avatar Steve Wise Committed by Doug Ledford
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RDMA/nldev: provide detailed CQ information 



Implement the RDMA nldev netlink interface for dumping detailed
CQ information.

Reviewed-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 00313983

drivers/infiniband/core/nldev.c

+52 −0
Original line number Diff line number Diff line
@@ -80,6 +80,11 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = { 
			.len = sizeof(struct __kernel_sockaddr_storage) },

	[RDMA_NLDEV_ATTR_RES_DST_ADDR]	= {

			.len = sizeof(struct __kernel_sockaddr_storage) },

	[RDMA_NLDEV_ATTR_RES_CQ]		= { .type = NLA_NESTED },

	[RDMA_NLDEV_ATTR_RES_CQ_ENTRY]		= { .type = NLA_NESTED },

	[RDMA_NLDEV_ATTR_RES_CQE]		= { .type = NLA_U32 },

	[RDMA_NLDEV_ATTR_RES_USECNT]		= { .type = NLA_U64 },

	[RDMA_NLDEV_ATTR_RES_POLL_CTX]		= { .type = NLA_U8 },

};



static int fill_nldev_handle(struct sk_buff *msg, struct ib_device *device)
@@ -359,6 +364,39 @@ static int fill_res_cm_id_entry(struct sk_buff *msg, 
	return -EMSGSIZE;

}



static int fill_res_cq_entry(struct sk_buff *msg, struct netlink_callback *cb,

			     struct rdma_restrack_entry *res, uint32_t port)

{

	struct ib_cq *cq = container_of(res, struct ib_cq, res);

	struct nlattr *entry_attr;



	entry_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_RES_CQ_ENTRY);

	if (!entry_attr)

		goto out;



	if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CQE, cq->cqe))

		goto err;

	if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_USECNT,

			      atomic_read(&cq->usecnt), 0))

		goto err;



	/* Poll context is only valid for kernel CQs */

	if (rdma_is_kernel_res(res) &&

	    nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_POLL_CTX, cq->poll_ctx))

		goto err;



	if (fill_res_name_pid(msg, res))

		goto err;



	nla_nest_end(msg, entry_attr);

	return 0;



err:

	nla_nest_cancel(msg, entry_attr);

out:

	return -EMSGSIZE;

}



static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh,

			  struct netlink_ext_ack *extack)

{
@@ -651,6 +689,11 @@ static const struct nldev_fill_res_entry fill_entries[RDMA_RESTRACK_MAX] = { 
		.nldev_cmd = RDMA_NLDEV_CMD_RES_CM_ID_GET,

		.nldev_attr = RDMA_NLDEV_ATTR_RES_CM_ID,

	},

	[RDMA_RESTRACK_CQ] = {

		.fill_res_func = fill_res_cq_entry,

		.nldev_cmd = RDMA_NLDEV_CMD_RES_CQ_GET,

		.nldev_attr = RDMA_NLDEV_ATTR_RES_CQ,

	},

};



static int res_get_common_dumpit(struct sk_buff *skb,
@@ -799,6 +842,12 @@ static int nldev_res_get_cm_id_dumpit(struct sk_buff *skb, 
	return res_get_common_dumpit(skb, cb, RDMA_RESTRACK_CM_ID);

}



static int nldev_res_get_cq_dumpit(struct sk_buff *skb,

				   struct netlink_callback *cb)

{

	return res_get_common_dumpit(skb, cb, RDMA_RESTRACK_CQ);

}



static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {

	[RDMA_NLDEV_CMD_GET] = {

		.doit = nldev_get_doit,
@@ -828,6 +877,9 @@ static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = { 
	[RDMA_NLDEV_CMD_RES_CM_ID_GET] = {

		.dump = nldev_res_get_cm_id_dumpit,

	},

	[RDMA_NLDEV_CMD_RES_CQ_GET] = {

		.dump = nldev_res_get_cq_dumpit,

	},

};



void __init nldev_init(void)

include/uapi/rdma/rdma_netlink.h

+8 −0
Original line number Diff line number Diff line
@@ -240,6 +240,8 @@ enum rdma_nldev_command { 


	RDMA_NLDEV_CMD_RES_CM_ID_GET, /* can dump */



	RDMA_NLDEV_CMD_RES_CQ_GET, /* can dump */



	RDMA_NLDEV_NUM_OPS

};
@@ -364,6 +366,12 @@ enum rdma_nldev_attr { 
	RDMA_NLDEV_ATTR_RES_SRC_ADDR,		/* __kernel_sockaddr_storage */

	RDMA_NLDEV_ATTR_RES_DST_ADDR,		/* __kernel_sockaddr_storage */



	RDMA_NLDEV_ATTR_RES_CQ,			/* nested table */

	RDMA_NLDEV_ATTR_RES_CQ_ENTRY,		/* nested table */

	RDMA_NLDEV_ATTR_RES_CQE,		/* u32 */

	RDMA_NLDEV_ATTR_RES_USECNT,		/* u64 */

	RDMA_NLDEV_ATTR_RES_POLL_CTX,		/* u8 */



	RDMA_NLDEV_ATTR_MAX

};

#endif /* _UAPI_RDMA_NETLINK_H */