[PATCH v3 rdma-next 4/5] RDMA/NLDEV: helper functions to add provider attributes

[Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>]

These help rdma providers to fill out the provider entries.

Signed-off-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
---
 drivers/infiniband/core/nldev.c | 67 +++++++++++++++++++++++++++++++++++++++++
 include/rdma/restrack.h         | 13 ++++++++
 2 files changed, 80 insertions(+)

diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
index 0610313..a11fd16 100644
--- a/drivers/infiniband/core/nldev.c
+++ b/drivers/infiniband/core/nldev.c
@@ -128,6 +128,73 @@ static int provider_fill_port_info(struct sk_buff *msg,
 		device->res.fill_port_info(msg, device, port) : 0;
 }
 
+static int put_provider_name_print_type(struct sk_buff *msg, const char *name,
+					enum rdma_nldev_print_type print_type)
+{
+	if (nla_put_string(msg, RDMA_NLDEV_ATTR_PROVIDER_STRING, name))
+		return -EMSGSIZE;
+	if (print_type != RDMA_NLDEV_PRINT_TYPE_UNSPEC &&
+	    nla_put_u8(msg, RDMA_NLDEV_ATTR_PROVIDER_PRINT_TYPE, print_type))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static int _rdma_nl_put_provider_u32(struct sk_buff *msg, const char *name,
+				     enum rdma_nldev_print_type print_type,
+				     u32 value)
+{
+	if (put_provider_name_print_type(msg, name, print_type))
+		return -EMSGSIZE;
+	if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PROVIDER_U32, value))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+static int _rdma_nl_put_provider_u64(struct sk_buff *msg, const char *name,
+				     enum rdma_nldev_print_type print_type,
+				     u64 value)
+{
+	if (put_provider_name_print_type(msg, name, print_type))
+		return -EMSGSIZE;
+	if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_PROVIDER_U64, value,
+			      RDMA_NLDEV_ATTR_PAD))
+		return -EMSGSIZE;
+
+	return 0;
+}
+
+int rdma_nl_put_provider_u32(struct sk_buff *msg, const char *name, u32 value)
+{
+	return _rdma_nl_put_provider_u32(msg, name,
+					 RDMA_NLDEV_PRINT_TYPE_UNSPEC, value);
+}
+EXPORT_SYMBOL(rdma_nl_put_provider_u32);
+
+int rdma_nl_put_provider_u32_hex(struct sk_buff *msg, const char *name,
+				 u32 value)
+{
+	return _rdma_nl_put_provider_u32(msg, name, RDMA_NLDEV_PRINT_TYPE_HEX,
+					 value);
+}
+EXPORT_SYMBOL(rdma_nl_put_provider_u32_hex);
+
+int rdma_nl_put_provider_u64(struct sk_buff *msg, const char *name, u64 value)
+{
+	return _rdma_nl_put_provider_u64(msg, name,
+					 RDMA_NLDEV_PRINT_TYPE_UNSPEC, value);
+}
+EXPORT_SYMBOL(rdma_nl_put_provider_u64);
+
+int rdma_nl_put_provider_u64_hex(struct sk_buff *msg, const char *name,
+				 u64 value)
+{
+	return _rdma_nl_put_provider_u64(msg, name, RDMA_NLDEV_PRINT_TYPE_HEX,
+					 value);
+}
+EXPORT_SYMBOL(rdma_nl_put_provider_u64_hex);
+
 static int fill_nldev_handle(struct sk_buff *msg, struct ib_device *device)
 {
 	if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index))
diff --git a/include/rdma/restrack.h b/include/rdma/restrack.h
index 525f885..10cca0e 100644
--- a/include/rdma/restrack.h
+++ b/include/rdma/restrack.h
@@ -12,6 +12,7 @@
 #include <linux/kref.h>
 #include <linux/completion.h>
 #include <linux/sched/task.h>
+#include <uapi/rdma/rdma_netlink.h>
 
 /**
  * enum rdma_restrack_type - HW objects to track
@@ -197,4 +198,16 @@ static inline void rdma_restrack_set_task(struct rdma_restrack_entry *res,
 	res->task = task;
 }
 
+/*
+ * Helper functions for rdma providers when filling out
+ * nldev provider attributes.
+ */
+int rdma_nl_put_provider_u32(struct sk_buff *msg, const char *name,
+			     u32 value);
+int rdma_nl_put_provider_u32_hex(struct sk_buff *msg, const char *name,
+				 u32 value);
+int rdma_nl_put_provider_u64(struct sk_buff *msg, const char *name,
+			     u64 value);
+int rdma_nl_put_provider_u64_hex(struct sk_buff *msg, const char *name,
+				 u64 value);
 #endif /* _RDMA_RESTRACK_H_ */
-- 
1.8.3.1

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