[PATCH 2/4] io_uring: pass in struct io_cancel_data consistently

[Jens Axboe <axboe@xxxxxxxxx>]

In preparation for being able to not only key cancel off the user_data,
pass in the io_cancel_data struct.

Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
---
 fs/io_uring.c | 49 +++++++++++++++++++++++++++++--------------------
 1 file changed, 29 insertions(+), 20 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 878d30a31606..c3955b9709c6 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -6316,10 +6316,15 @@ static bool io_poll_disarm(struct io_kiocb *req)
 	return true;
 }
 
-static int io_poll_cancel(struct io_ring_ctx *ctx, __u64 sqe_addr)
+struct io_cancel_data {
+	struct io_ring_ctx *ctx;
+	u64 user_data;
+};
+
+static int io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd)
 	__must_hold(&ctx->completion_lock)
 {
-	struct io_kiocb *req = io_poll_find(ctx, sqe_addr, false);
+	struct io_kiocb *req = io_poll_find(ctx, cd->user_data, false);
 
 	if (!req)
 		return -ENOENT;
@@ -6752,11 +6757,6 @@ static int io_timeout(struct io_kiocb *req, unsigned int issue_flags)
 	return 0;
 }
 
-struct io_cancel_data {
-	struct io_ring_ctx *ctx;
-	u64 user_data;
-};
-
 static bool io_cancel_cb(struct io_wq_work *work, void *data)
 {
 	struct io_kiocb *req = container_of(work, struct io_kiocb, work);
@@ -6765,17 +6765,16 @@ static bool io_cancel_cb(struct io_wq_work *work, void *data)
 	return req->ctx == cd->ctx && req->cqe.user_data == cd->user_data;
 }
 
-static int io_async_cancel_one(struct io_uring_task *tctx, u64 user_data,
-			       struct io_ring_ctx *ctx)
+static int io_async_cancel_one(struct io_uring_task *tctx,
+			       struct io_cancel_data *cd)
 {
-	struct io_cancel_data data = { .ctx = ctx, .user_data = user_data, };
 	enum io_wq_cancel cancel_ret;
 	int ret = 0;
 
 	if (!tctx || !tctx->io_wq)
 		return -ENOENT;
 
-	cancel_ret = io_wq_cancel_cb(tctx->io_wq, io_cancel_cb, &data, false);
+	cancel_ret = io_wq_cancel_cb(tctx->io_wq, io_cancel_cb, cd, false);
 	switch (cancel_ret) {
 	case IO_WQ_CANCEL_OK:
 		ret = 0;
@@ -6791,14 +6790,15 @@ static int io_async_cancel_one(struct io_uring_task *tctx, u64 user_data,
 	return ret;
 }
 
-static int io_try_cancel_userdata(struct io_kiocb *req, u64 sqe_addr)
+static int io_try_cancel_userdata(struct io_kiocb *req,
+				  struct io_cancel_data *cd)
 {
 	struct io_ring_ctx *ctx = req->ctx;
 	int ret;
 
 	WARN_ON_ONCE(!io_wq_current_is_worker() && req->task != current);
 
-	ret = io_async_cancel_one(req->task->io_uring, sqe_addr, ctx);
+	ret = io_async_cancel_one(req->task->io_uring, cd);
 	/*
 	 * Fall-through even for -EALREADY, as we may have poll armed
 	 * that need unarming.
@@ -6807,12 +6807,12 @@ static int io_try_cancel_userdata(struct io_kiocb *req, u64 sqe_addr)
 		return 0;
 
 	spin_lock(&ctx->completion_lock);
-	ret = io_poll_cancel(ctx, sqe_addr);
+	ret = io_poll_cancel(ctx, cd);
 	if (ret != -ENOENT)
 		goto out;
 
 	spin_lock_irq(&ctx->timeout_lock);
-	ret = io_timeout_cancel(ctx, sqe_addr);
+	ret = io_timeout_cancel(ctx, cd->user_data);
 	spin_unlock_irq(&ctx->timeout_lock);
 out:
 	spin_unlock(&ctx->completion_lock);
@@ -6837,11 +6837,14 @@ static int io_async_cancel_prep(struct io_kiocb *req,
 static int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags)
 {
 	struct io_ring_ctx *ctx = req->ctx;
-	u64 sqe_addr = req->cancel.addr;
+	struct io_cancel_data cd = {
+		.ctx		= ctx,
+		.user_data	= req->cancel.addr,
+	};
 	struct io_tctx_node *node;
 	int ret;
 
-	ret = io_try_cancel_userdata(req, sqe_addr);
+	ret = io_try_cancel_userdata(req, &cd);
 	if (ret != -ENOENT)
 		goto done;
 
@@ -6851,7 +6854,7 @@ static int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags)
 	list_for_each_entry(node, &ctx->tctx_list, ctx_node) {
 		struct io_uring_task *tctx = node->task->io_uring;
 
-		ret = io_async_cancel_one(tctx, req->cancel.addr, ctx);
+		ret = io_async_cancel_one(tctx, &cd);
 		if (ret != -ENOENT)
 			break;
 	}
@@ -7455,8 +7458,14 @@ static void io_req_task_link_timeout(struct io_kiocb *req, bool *locked)
 	int ret = -ENOENT;
 
 	if (prev) {
-		if (!(req->task->flags & PF_EXITING))
-			ret = io_try_cancel_userdata(req, prev->cqe.user_data);
+		if (!(req->task->flags & PF_EXITING)) {
+			struct io_cancel_data cd = {
+				.ctx		= req->ctx,
+				.user_data	= prev->cqe.user_data,
+			};
+
+			ret = io_try_cancel_userdata(req, &cd);
+		}
 		io_req_complete_post(req, ret ?: -ETIME, 0);
 		io_put_req(prev);
 	} else {
-- 
2.35.1