IB/verbs: Add helper function rdma_udata_to_drv_context (730623f4) · Commits · 戴 / test

include/rdma/uverbs_ioctl.h

+17 −0

Original line number	Diff line number	Diff line
		@@ -664,6 +664,23 @@ static inline bool uverbs_attr_is_valid(const struct uverbs_attr_bundle *attrs_b
		attrs_bundle->attr_present);
		}

		/**
		* rdma_udata_to_drv_context - Helper macro to get the driver's context out of
		* ib_udata which is embedded in uverbs_attr_bundle.
		*
		* If udata is not NULL this cannot fail. Otherwise a NULL udata will result
		* in a NULL ucontext pointer, as a safety precaution. Callers should be using
		* 'udata' to determine if the driver call is in user or kernel mode, not
		* 'ucontext'.
		*
		*/
		#define rdma_udata_to_drv_context(udata, drv_dev_struct, member) \
		(udata ? container_of(container_of(udata, struct uverbs_attr_bundle, \
		driver_udata) \
		->context, \
		drv_dev_struct, member) : \
		(drv_dev_struct *)NULL)

		#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,