Commit 16375af3 authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
Browse files

io_uring/memmap: flag regions with user pages 



In preparation to kernel allocated regions add a flag telling if
the region contains user pinned pages or not.

Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/0dc91564642654405bab080b7ec911cb4a43ec6e.1732886067.git.asml.silence@gmail.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent a730d204

io_uring/memmap.c

+7 −2
Original line number Diff line number Diff line
@@ -205,12 +205,17 @@ void *__io_uaddr_map(struct page ***pages, unsigned short *npages, 
enum {

	/* memory was vmap'ed for the kernel, freeing the region vunmap's it */

	IO_REGION_F_VMAP			= 1,

	/* memory is provided by user and pinned by the kernel */

	IO_REGION_F_USER_PROVIDED		= 2,

};



void io_free_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr)

{

	if (mr->pages) {

		if (mr->flags & IO_REGION_F_USER_PROVIDED)

			unpin_user_pages(mr->pages, mr->nr_pages);

		else

			release_pages(mr->pages, mr->nr_pages);

		kvfree(mr->pages);

	}

	if ((mr->flags & IO_REGION_F_VMAP) && mr->ptr)
@@ -267,7 +272,7 @@ int io_create_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr, 
	mr->pages = pages;

	mr->ptr = vptr;

	mr->nr_pages = nr_pages;

	mr->flags |= IO_REGION_F_VMAP;

	mr->flags |= IO_REGION_F_VMAP | IO_REGION_F_USER_PROVIDED;

	return 0;

out_free:

	if (pages_accounted)