Commit b51caeb2 authored by Jason Gunthorpe's avatar Jason Gunthorpe
Browse files

RDMA/core: Add rdma_udata_to_dev() 

Get an ib_device out of a udata so it can be used for debug prints.

Link: https://patch.msgid.link/r/2-v3-bd56dd443069+49-bnxt_re_uapi_jgg@nvidia.com


Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent 38a6e557

drivers/infiniband/core/ib_core_uverbs.c

+27 −0
Original line number Diff line number Diff line
@@ -389,3 +389,30 @@ int rdma_user_mmap_entry_insert(struct ib_ucontext *ucontext, 
						 U32_MAX);

}

EXPORT_SYMBOL(rdma_user_mmap_entry_insert);



/**

 * rdma_udata_to_dev - Get a ib_device from a udata

 * @udata: The system calls ib_udata struct

 *

 * The struct ib_device that is handling the uverbs call. Must not be called if

 * udata is NULL. The result can be NULL.

 */

struct ib_device *rdma_udata_to_dev(struct ib_udata *udata)

{

	struct uverbs_attr_bundle *bundle =

		rdma_udata_to_uverbs_attr_bundle(udata);



	lockdep_assert_held(&bundle->ufile->device->disassociate_srcu);



	if (bundle->context)

		return bundle->context->device;



	/*

	 * If the context hasn't been created yet use the ufile's dev, but it

	 * might be NULL if we are racing with disassociate.

	 */

	return srcu_dereference(bundle->ufile->device->ib_dev,

				&bundle->ufile->device->disassociate_srcu);

}

EXPORT_SYMBOL(rdma_udata_to_dev);

include/rdma/uverbs_ioctl.h

+2 −0
Original line number Diff line number Diff line
@@ -667,6 +667,8 @@ rdma_udata_to_uverbs_attr_bundle(struct ib_udata *udata) 
	(udata ? container_of(rdma_udata_to_uverbs_attr_bundle(udata)->context, \

			      drv_dev_struct, member) : (drv_dev_struct *)NULL)



struct ib_device *rdma_udata_to_dev(struct ib_udata *udata);



#define IS_UVERBS_COPY_ERR(_ret)		((_ret) && (_ret) != -ENOENT)



static inline const struct uverbs_attr *uverbs_attr_get(const struct uverbs_attr_bundle *attrs_bundle,