From fcde59feb1affb6d56aecadc3868df4631480da5 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Mon, 23 May 2022 16:53:15 -0600
Subject: [PATCH] io_uring: add io_op_defs 'def' pointer in req init and issue
Git-commit: fcde59feb1affb6d56aecadc3868df4631480da5
Patch-mainline: v5.19-rc1
References: bsc#1205205

Define and set it when appropriate, and use it consistently in the
function rather than using io_op_defs[opcode].

Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
---
 fs/io_uring.c |   12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8394,6 +8394,7 @@ static int io_init_req(struct io_ring_ct
 		       const struct io_uring_sqe *sqe)
 	__must_hold(&ctx->uring_lock)
 {
+	const struct io_op_def *def;
 	unsigned int sqe_flags;
 	int personality;
 	u8 opcode;
@@ -8411,12 +8412,13 @@ static int io_init_req(struct io_ring_ct
 		req->opcode = 0;
 		return -EINVAL;
 	}
+	def = &io_op_defs[opcode];
 	if (unlikely(sqe_flags & ~SQE_COMMON_FLAGS)) {
 		/* enforce forwards compatibility on users */
 		if (sqe_flags & ~SQE_VALID_FLAGS)
 			return -EINVAL;
 		if (sqe_flags & IOSQE_BUFFER_SELECT) {
-			if (!io_op_defs[opcode].buffer_select)
+			if (!def->buffer_select)
 				return -EOPNOTSUPP;
 			req->buf_index = READ_ONCE(sqe->buf_group);
 		}
@@ -8442,12 +8444,12 @@ static int io_init_req(struct io_ring_ct
 		}
 	}
 
-	if (!io_op_defs[opcode].ioprio && sqe->ioprio)
+	if (!def->ioprio && sqe->ioprio)
 		return -EINVAL;
-	if (!io_op_defs[opcode].iopoll && (ctx->flags & IORING_SETUP_IOPOLL))
+	if (!def->iopoll && (ctx->flags & IORING_SETUP_IOPOLL))
 		return -EINVAL;
 
-	if (io_op_defs[opcode].needs_file) {
+	if (def->needs_file) {
 		struct io_submit_state *state = &ctx->submit_state;
 
 		req->cqe.fd = READ_ONCE(sqe->fd);
@@ -8456,7 +8458,7 @@ static int io_init_req(struct io_ring_ct
 		 * Plug now if we have more than 2 IO left after this, and the
 		 * target is potentially a read/write to block based storage.
 		 */
-		if (state->need_plug && io_op_defs[opcode].plug) {
+		if (state->need_plug && def->plug) {
 			state->plug_started = true;
 			state->need_plug = false;
 			blk_start_plug_nr_ios(&state->plug, state->submit_nr);