linux-kernel - [PATCH v5 4/5] ublk: add helper to check if device supports user copy

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Message-ID: <20230704165209.514591-5-nmi@metaspace.dk>
Date:   Tue,  4 Jul 2023 18:52:08 +0200
From:   Andreas Hindborg <nmi@...aspace.dk>
To:     Ming Lei <ming.lei@...hat.com>
Cc:     linux-kernel@...r.kernel.org (open list),
        Matias Bjorling <Matias.Bjorling@....com>,
        Hans Holmberg <Hans.Holmberg@....com>,
        Jens Axboe <axboe@...nel.dk>,
        Minwoo Im <minwoo.im.dev@...il.com>,
        Aravind Ramesh <Aravind.Ramesh@....com>, gost.dev@...sung.com,
        linux-block@...r.kernel.org (open list:BLOCK LAYER),
        Christoph Hellwig <hch@...radead.org>,
        Damien Le Moal <dlemoal@...nel.org>,
        Andreas Hindborg <a.hindborg@...sung.com>
Subject: [PATCH v5 4/5] ublk: add helper to check if device supports user copy

From: Andreas Hindborg <a.hindborg@...sung.com>

This will be used by ublk zoned storage support.

Signed-off-by: Andreas Hindborg <a.hindborg@...sung.com>
---
 drivers/block/ublk.c | 2 +-
 drivers/block/ublk.h | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/block/ublk.c b/drivers/block/ublk.c
index a0453619bf67..0b1ec102aaae 100644
--- a/drivers/block/ublk.c
+++ b/drivers/block/ublk.c
@@ -1947,7 +1947,7 @@ static int ublk_ctrl_add_dev(struct io_uring_cmd *cmd)
 		UBLK_F_URING_CMD_COMP_IN_TASK;
 
 	/* GET_DATA isn't needed any more with USER_COPY */
-	if (ub->dev_info.flags & UBLK_F_USER_COPY)
+	if (ublk_dev_is_user_copy(ub))
 		ub->dev_info.flags &= ~UBLK_F_NEED_GET_DATA;
 
 	/* We are not ready to support zero copy */
diff --git a/drivers/block/ublk.h b/drivers/block/ublk.h
index 2a4ab721d513..fcbcc6b02aa0 100644
--- a/drivers/block/ublk.h
+++ b/drivers/block/ublk.h
@@ -100,4 +100,9 @@ struct ublk_io {
 	struct io_uring_cmd *cmd;
 };
 
+static inline bool ublk_dev_is_user_copy(const struct ublk_device *ub)
+{
+	return ub->dev_info.flags & UBLK_F_USER_COPY;
+}
+
 #endif
-- 
2.41.0