Add helper io_uring_cmd_ctx_handle() for driver to track per-context
resource, such as registered kernel io buffer.
Suggested-by: Caleb Sander Mateos <csander@xxxxxxxxxxxxxxx>
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
include/linux/io_uring/cmd.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/linux/io_uring/cmd.h b/include/linux/io_uring/cmd.h
index 0634a3de1782..92d523865df8 100644
--- a/include/linux/io_uring/cmd.h
+++ b/include/linux/io_uring/cmd.h
@@ -140,6 +140,15 @@ static inline struct io_uring_cmd_data *io_uring_cmd_get_async_data(struct io_ur
return cmd_to_io_kiocb(cmd)->async_data;
}
+/*
+ * Return uring_cmd's context reference as its context handle for driver to
+ * track per-context resource, such as registered kernel IO buffer
+ */
+static inline unsigned long io_uring_cmd_ctx_handle(struct io_uring_cmd *cmd)
+{
+ return (unsigned long)cmd_to_io_kiocb(cmd)->ctx;
+}
+
int io_buffer_register_bvec(struct io_uring_cmd *cmd, struct request *rq,
void (*release)(void *), unsigned int index,
unsigned int issue_flags);
--
2.47.0
