[PATCH v4 for-next 11/12] RDMA/nldev: Add detailed CTX information support

[Wenpeng Liang <liangwenpeng@xxxxxxxxxx>]

From: Xi Wang <wangxi11@xxxxxxxxxx>

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

Signed-off-by: Xi Wang <wangxi11@xxxxxxxxxx>
Signed-off-by: Wenpeng Liang <liangwenpeng@xxxxxxxxxx>
---
 drivers/infiniband/core/device.c | 1 +
 drivers/infiniband/core/nldev.c  | 8 +++++++-
 include/rdma/ib_verbs.h          | 1 +
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 9056f48..195986f 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -2641,6 +2641,7 @@ void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
 	SET_DEVICE_OP(dev_ops, drain_rq);
 	SET_DEVICE_OP(dev_ops, drain_sq);
 	SET_DEVICE_OP(dev_ops, enable_driver);
+	SET_DEVICE_OP(dev_ops, fill_res_ctx_entry);
 	SET_DEVICE_OP(dev_ops, fill_res_cm_id_entry);
 	SET_DEVICE_OP(dev_ops, fill_res_cq_entry);
 	SET_DEVICE_OP(dev_ops, fill_res_cq_entry_raw);
diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
index e9b4b2c..e8c99b7 100644
--- a/drivers/infiniband/core/nldev.c
+++ b/drivers/infiniband/core/nldev.c
@@ -716,6 +716,7 @@ static int fill_res_ctx_entry(struct sk_buff *msg, bool has_cap_net_admin,
 			      struct rdma_restrack_entry *res, uint32_t port)
 {
 	struct ib_ucontext *ctx = container_of(res, struct ib_ucontext, res);
+	struct ib_device *dev = ctx->device;
 
 	if (rdma_is_kernel_res(res))
 		return 0;
@@ -723,7 +724,12 @@ static int fill_res_ctx_entry(struct sk_buff *msg, bool has_cap_net_admin,
 	if (nla_put_u32(msg, RDMA_NLDEV_ATTR_RES_CTXN, ctx->res.id))
 		return -EMSGSIZE;
 
-	return fill_res_name_pid(msg, res);
+	if (fill_res_name_pid(msg, res))
+		return -EMSGSIZE;
+
+	return (dev->ops.fill_res_ctx_entry) ?
+		       dev->ops.fill_res_ctx_entry(msg, ctx) :
+		       0;
 }
 
 static int fill_res_range_qp_entry(struct sk_buff *msg, uint32_t min_range,
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 371df1c..b0277c5 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2568,6 +2568,7 @@ struct ib_device_ops {
 	/**
 	 * Allows rdma drivers to add their own restrack attributes.
 	 */
+	int (*fill_res_ctx_entry)(struct sk_buff *msg, struct ib_ucontext *ctx);
 	int (*fill_res_mr_entry)(struct sk_buff *msg, struct ib_mr *ibmr);
 	int (*fill_res_mr_entry_raw)(struct sk_buff *msg, struct ib_mr *ibmr);
 	int (*fill_res_cq_entry)(struct sk_buff *msg, struct ib_cq *ibcq);
-- 
2.8.1