Commit 49b2b973 authored Nov 19, 2024 by Michal Luczaj Committed by Paolo Abeni Nov 28, 2024

net: Comment copy_from_sockptr() explaining its behaviour



copy_from_sockptr() has a history of misuse. Add a comment explaining that
the function follows API of copy_from_user(), i.e. returns 0 for success,
or number of bytes not copied on error.

Signed-off-by: Michal Luczaj <mhal@rbox.co>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

parent 02020056

include/linux/sockptr.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,8 @@ static inline int copy_from_sockptr_offset(void *dst, sockptr_t src,
		/* Deprecated.
		* This is unsafe, unless caller checked user provided optlen.
		* Prefer copy_safe_from_sockptr() instead.
		*
		* Returns 0 for success, or number of bytes not copied on error.
		*/
		static inline int copy_from_sockptr(void *dst, sockptr_t src, size_t size)
		{