[PATCH 02/10] io_uring: pass io_uring_ctx->id to uring_cmd

[Ming Lei <ming.lei@redhat.com>]

Pass io_uring_ctx-id to uring_cmd driver, and prepare for supporting
io_uring ctx or task exit notifier.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 include/linux/io_uring.h | 6 +++++-
 io_uring/uring_cmd.c     | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h
index ec9714e36477..c395807bd7cf 100644
--- a/include/linux/io_uring.h
+++ b/include/linux/io_uring.h
@@ -33,7 +33,11 @@ struct io_uring_cmd {
 	};
 	u32		cmd_op;
 	u32		flags;
-	u8		pdu[32]; /* available inline for free use */
+	union {
+		/* driver needs to save ctx_id */
+		u32		ctx_id;
+		u8		pdu[32]; /* available inline for free use */
+	};
 };
 
 static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe)
diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c
index 537795fddc87..c54c627fb6b9 100644
--- a/io_uring/uring_cmd.c
+++ b/io_uring/uring_cmd.c
@@ -105,6 +105,7 @@ int io_uring_cmd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 		req->imu = ctx->user_bufs[index];
 		io_req_set_rsrc_node(req, ctx, 0);
 	}
+	ioucmd->ctx_id = req->ctx->id;
 	ioucmd->sqe = sqe;
 	ioucmd->cmd_op = READ_ONCE(sqe->cmd_op);
 	return 0;
-- 
2.40.1