diff options
| author | David Wei <dw@davidwei.uk> | 2025-02-14 16:09:37 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-02-17 05:41:09 -0700 |
| commit | cf96310c5f9a0d542db99c887742811425ba2ec0 (patch) | |
| tree | a1efc9d04c414a8f3516ad34e8a95f3fd16e8691 /io_uring/rsrc.h | |
| parent | 6f377873cb23905009759b7366b9fe85c2a6ff37 (diff) | |
io_uring/zcrx: add io_zcrx_area
Add io_zcrx_area that represents a region of userspace memory that is
used for zero copy. During ifq registration, userspace passes in the
uaddr and len of userspace memory, which is then pinned by the kernel.
Each net_iov is mapped to one of these pages.
The freelist is a spinlock protected list that keeps track of all the
net_iovs/pages that aren't used.
For now, there is only one area per ifq and area registration happens
implicitly as part of ifq registration. There is no API for
adding/removing areas yet. The struct for area registration is there for
future extensibility once we support multiple areas and TCP devmem.
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: David Wei <dw@davidwei.uk>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20250215000947.789731-3-dw@davidwei.uk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/rsrc.h')
| -rw-r--r-- | io_uring/rsrc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/io_uring/rsrc.h b/io_uring/rsrc.h index a6d883c62b22..abf86b5b8614 100644 --- a/io_uring/rsrc.h +++ b/io_uring/rsrc.h @@ -68,6 +68,7 @@ int io_register_rsrc_update(struct io_ring_ctx *ctx, void __user *arg, unsigned size, unsigned type); int io_register_rsrc(struct io_ring_ctx *ctx, void __user *arg, unsigned int size, unsigned int type); +int io_buffer_validate(struct iovec *iov); bool io_check_coalesce_buffer(struct page **page_array, int nr_pages, struct io_imu_folio_data *data); |