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authorPavel Begunkov <asml.silence@gmail.com>2022-07-12 23:52:42 +0300
committerJens Axboe <axboe@kernel.dk>2022-07-25 03:41:07 +0300
commitbc24d6bd32df0be19df3d30e74be4ba56493c0e2 (patch)
tree5eb3dd69a67f4eb5f256ec5e9253c16ab72c462b /io_uring/notif.h
parent68ef5578efc8893489400b1ec30af66dab4f75ff (diff)
downloadlinux-bc24d6bd32df0be19df3d30e74be4ba56493c0e2.tar.xz
io_uring: add notification slot registration
Let the userspace to register and unregister notification slots. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/a0aa8161fe3ebb2a4cc6e5dbd0cffb96e6881cf5.1657643355.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/notif.h')
-rw-r--r--io_uring/notif.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/io_uring/notif.h b/io_uring/notif.h
index 1dd48efb7744..00efe164bdc4 100644
--- a/io_uring/notif.h
+++ b/io_uring/notif.h
@@ -6,6 +6,7 @@
#include <linux/nospec.h>
#define IO_NOTIF_SPLICE_BATCH 32
+#define IORING_MAX_NOTIF_SLOTS (1U << 10)
struct io_notif {
struct ubuf_info uarg;
@@ -48,6 +49,8 @@ struct io_notif_slot {
u32 seq;
};
+int io_notif_register(struct io_ring_ctx *ctx,
+ void __user *arg, unsigned int size);
int io_notif_unregister(struct io_ring_ctx *ctx);
void io_notif_cache_purge(struct io_ring_ctx *ctx);