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Commit 18c4c66f authored by Leon Romanovsky's avatar Leon Romanovsky Committed by Jason Gunthorpe
Browse files

RDMA/restrack: Translate from ID to restrack object 



Add new general helper to get restrack entry given by ID and their
respective type.

Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent fd47c2f9

drivers/infiniband/core/restrack.c

+25 −0
Original line number Diff line number Diff line
@@ -256,6 +256,31 @@ int __must_check rdma_restrack_get(struct rdma_restrack_entry *res) 
}

EXPORT_SYMBOL(rdma_restrack_get);



/**

 * rdma_restrack_get_byid() - translate from ID to restrack object

 * @dev: IB device

 * @type: resource track type

 * @id: ID to take a look

 *

 * Return: Pointer to restrack entry or -ENOENT in case of error.

 */

struct rdma_restrack_entry *

rdma_restrack_get_byid(struct ib_device *dev,

		       enum rdma_restrack_type type, u32 id)

{

	struct rdma_restrack_root *rt = &dev->res;

	struct rdma_restrack_entry *res;



	down_read(&dev->res.rwsem);

	res = xa_load(&rt->xa[type], id);

	if (!res || !rdma_restrack_get(res))

		res = ERR_PTR(-ENOENT);

	up_read(&dev->res.rwsem);



	return res;

}

EXPORT_SYMBOL(rdma_restrack_get_byid);



static void restrack_release(struct kref *kref)

{

	struct rdma_restrack_entry *res;

include/rdma/restrack.h

+3 −0
Original line number Diff line number Diff line
@@ -179,4 +179,7 @@ int rdma_nl_put_driver_u32_hex(struct sk_buff *msg, const char *name, 
int rdma_nl_put_driver_u64(struct sk_buff *msg, const char *name, u64 value);

int rdma_nl_put_driver_u64_hex(struct sk_buff *msg, const char *name,

			       u64 value);

struct rdma_restrack_entry *rdma_restrack_get_byid(struct ib_device *dev,

						   enum rdma_restrack_type type,

						   u32 id);

#endif /* _RDMA_RESTRACK_H_ */