On Thu, 18 Jul 2024 11:45:12 +0300 Ofir Gal wrote: > Network drivers are using sendpage_ok() to check the first page of an > iterator in order to disable MSG_SPLICE_PAGES. The iterator can > represent list of contiguous pages. > > When MSG_SPLICE_PAGES is enabled skb_splice_from_iter() is being used, > it requires all pages in the iterator to be sendable. Therefore it needs > to check that each page is sendable. > > The patch introduces a helper sendpages_ok(), it returns true if all the > contiguous pages are sendable. > > Drivers who want to send contiguous pages with MSG_SPLICE_PAGES may use > this helper to check whether the page list is OK. If the helper does not > return true, the driver should remove MSG_SPLICE_PAGES flag. Acked-by: Jakub Kicinski <kuba@xxxxxxxxxx>
