On 2023/10/12 17:12, Yi Liu wrote:
On 2023/9/26 14:56, Tian, Kevin wrote:
From: Yi Liu <yi.l.liu@xxxxxxxxx>
Sent: Thursday, September 21, 2023 3:51 PM
+
+/**
+ * iommu_copy_user_data - Copy iommu driver specific user space data
+ * @dst_data: Pointer to an iommu driver specific user data that is
defined
in
+ * include/uapi/linux/iommufd.h
+ * @src_data: Pointer to a struct iommu_user_data for user space data info
+ * @data_len: Length of current user data structure, i.e. sizeof(struct
_dst)
+ * @min_len: Initial length of user data structure for backward
compatibility.
+ * This should be offsetofend using the last member in the
user data
+ * struct that was initially added to
include/uapi/linux/iommufd.h
+ */
+static inline int iommu_copy_user_data(void *dst_data,
+ const struct iommu_user_data *src_data,
+ size_t data_len, size_t min_len)
iommu_copy_struct_from_user()?
btw given the confusion raised on how this would be used is it clearer
to move it to the patch together with the 1st user?
sure. How about your opinion? @Nic.
after a second thinking, the first user of this helper is the patch to
extend mock iommu driver. Is it suitable to introduce a common API together
with selftest code?
https://lore.kernel.org/linux-iommu/20230921075138.124099-14-yi.l.liu@xxxxxxxxx/
--
Regards,
Yi Liu
