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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/include/rdma/restrack.h
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@@ -7,12 +7,15 @@
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 #define _RDMA_RESTRACK_H_
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 #include <linux/typecheck.h>
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-#include <linux/rwsem.h>
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 #include <linux/sched.h>
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 #include <linux/kref.h>
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 #include <linux/completion.h>
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 #include <linux/sched/task.h>
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 #include <uapi/rdma/rdma_netlink.h>
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+#include <linux/xarray.h>
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+
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+struct ib_device;
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+struct sk_buff;
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 /**
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  * enum rdma_restrack_type - HW objects to track
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@@ -39,34 +42,17 @@
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 	 */
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 	RDMA_RESTRACK_MR,
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 	/**
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+	 * @RDMA_RESTRACK_CTX: Verbs contexts (CTX)
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+	 */
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+	RDMA_RESTRACK_CTX,
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+	/**
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+	 * @RDMA_RESTRACK_COUNTER: Statistic Counter
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+	 */
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+	RDMA_RESTRACK_COUNTER,
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+	/**
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 	 * @RDMA_RESTRACK_MAX: Last entry, used for array dclarations
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 	 */
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 	RDMA_RESTRACK_MAX
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-};
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-
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-#define RDMA_RESTRACK_HASH_BITS	8
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-struct rdma_restrack_entry;
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-
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-/**
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- * struct rdma_restrack_root - main resource tracking management
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- * entity, per-device
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- */
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-struct rdma_restrack_root {
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-	/*
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-	 * @rwsem: Read/write lock to protect lists
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-	 */
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-	struct rw_semaphore	rwsem;
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-	/**
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-	 * @hash: global database for all resources per-device
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-	 */
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-	DECLARE_HASHTABLE(hash, RDMA_RESTRACK_HASH_BITS);
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-	/**
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-	 * @fill_res_entry: driver-specific fill function
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-	 *
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-	 * Allows rdma drivers to add their own restrack attributes.
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-	 */
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-	int (*fill_res_entry)(struct sk_buff *msg,
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-			      struct rdma_restrack_entry *entry);
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 };
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 /**
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@@ -105,57 +91,28 @@
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 	 */
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 	const char		*kern_name;
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 	/**
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-	 * @node: hash table entry
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-	 */
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-	struct hlist_node	node;
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-	/**
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 	 * @type: various objects in restrack database
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 	 */
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 	enum rdma_restrack_type	type;
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+	/**
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+	 * @user: user resource
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+	 */
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+	bool			user;
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+	/**
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+	 * @id: ID to expose to users
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+	 */
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+	u32 id;
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 };
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-/**
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- * rdma_restrack_init() - initialize resource tracking
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- * @res:  resource tracking root
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- */
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-void rdma_restrack_init(struct rdma_restrack_root *res);
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-
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-/**
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- * rdma_restrack_clean() - clean resource tracking
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- * @res:  resource tracking root
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- */
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-void rdma_restrack_clean(struct rdma_restrack_root *res);
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-
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-/**
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- * rdma_restrack_count() - the current usage of specific object
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- * @res:  resource entry
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- * @type: actual type of object to operate
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- * @ns:   PID namespace
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- */
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-int rdma_restrack_count(struct rdma_restrack_root *res,
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-			enum rdma_restrack_type type,
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-			struct pid_namespace *ns);
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-
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-/**
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- * rdma_restrack_add() - add object to the reource tracking database
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- * @res:  resource entry
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- */
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-void rdma_restrack_add(struct rdma_restrack_entry *res);
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-
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-/**
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- * rdma_restrack_del() - delete object from the reource tracking database
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- * @res:  resource entry
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- * @type: actual type of object to operate
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- */
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-void rdma_restrack_del(struct rdma_restrack_entry *res);
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-
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+int rdma_restrack_count(struct ib_device *dev,
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+			enum rdma_restrack_type type);
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 /**
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  * rdma_is_kernel_res() - check the owner of resource
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  * @res:  resource entry
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  */
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-static inline bool rdma_is_kernel_res(struct rdma_restrack_entry *res)
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+static inline bool rdma_is_kernel_res(const struct rdma_restrack_entry *res)
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 {
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-	return !res->task;
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+	return !res->user;
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 }
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 /**
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@@ -170,20 +127,6 @@
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  */
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 int rdma_restrack_put(struct rdma_restrack_entry *res);
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-/**
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- * rdma_restrack_set_task() - set the task for this resource
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- * @res:  resource entry
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- * @task: task struct
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- */
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-static inline void rdma_restrack_set_task(struct rdma_restrack_entry *res,
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-					  struct task_struct *task)
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-{
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-	if (res->task)
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-		put_task_struct(res->task);
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-	get_task_struct(task);
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-	res->task = task;
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-}
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-
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 /*
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  * Helper functions for rdma drivers when filling out
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  * nldev driver attributes.
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@@ -194,4 +137,12 @@
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 int rdma_nl_put_driver_u64(struct sk_buff *msg, const char *name, u64 value);
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 int rdma_nl_put_driver_u64_hex(struct sk_buff *msg, const char *name,
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 			       u64 value);
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+int rdma_nl_put_driver_string(struct sk_buff *msg, const char *name,
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+			      const char *str);
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+int rdma_nl_stat_hwcounter_entry(struct sk_buff *msg, const char *name,
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+				 u64 value);
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+
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+struct rdma_restrack_entry *rdma_restrack_get_byid(struct ib_device *dev,
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+						   enum rdma_restrack_type type,
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+						   u32 id);
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 #endif /* _RDMA_RESTRACK_H_ */