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authorBreno Leitao <leitao@debian.org>2023-05-04 05:18:54 -0700
committerJens Axboe <axboe@kernel.dk>2023-05-04 08:19:05 -0600
commit96c7d4f81db0fea05c0792f7563ae0cb4ad5f022 (patch)
tree3ba7822915e1b177a9680b19d0cf4a1b1b35a141 /io_uring/io_uring.h
parent776617db78c6d208780e7c69d4d68d1fa82913de (diff)
io_uring: Create a helper to return the SQE size
Create a simple helper that returns the size of the SQE. The SQE could have two size, depending of the flags. If IO_URING_SETUP_SQE128 flag is set, then return a double SQE, otherwise returns the sizeof of io_uring_sqe (64 bytes). Signed-off-by: Breno Leitao <leitao@debian.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/20230504121856.904491-2-leitao@debian.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/io_uring.h')
-rw-r--r--io_uring/io_uring.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h
index 25515d69d205..259bf798a390 100644
--- a/io_uring/io_uring.h
+++ b/io_uring/io_uring.h
@@ -394,4 +394,14 @@ static inline void io_req_queue_tw_complete(struct io_kiocb *req, s32 res)
io_req_task_work_add(req);
}
+/*
+ * IORING_SETUP_SQE128 contexts allocate twice the normal SQE size for each
+ * slot.
+ */
+static inline size_t uring_sqe_size(struct io_ring_ctx *ctx)
+{
+ if (ctx->flags & IORING_SETUP_SQE128)
+ return 2 * sizeof(struct io_uring_sqe);
+ return sizeof(struct io_uring_sqe);
+}
#endif