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Subject[PATCH v10 2/3] ublk: move check for empty address field on command submission
Date
From: Andreas Hindborg <a.hindborg@samsung.com>

In preparation for zoned storage support, move the check for empty `addr`
field into the command handler case statement. Note that the check makes no
sense for `UBLK_IO_NEED_GET_DATA` because the `addr` field must always be
set for this command.

Signed-off-by: Andreas Hindborg <a.hindborg@samsung.com>
---
drivers/block/ublk_drv.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index db3523e281a6..5a1ee17636ac 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -1419,11 +1419,6 @@ static int __ublk_ch_uring_cmd(struct io_uring_cmd *cmd,
^ (_IOC_NR(cmd_op) == UBLK_IO_NEED_GET_DATA))
goto out;

- if (ublk_support_user_copy(ubq) && ub_cmd->addr) {
- ret = -EINVAL;
- goto out;
- }
-
ret = ublk_check_cmd_op(cmd_op);
if (ret)
goto out;
@@ -1452,6 +1447,12 @@ static int __ublk_ch_uring_cmd(struct io_uring_cmd *cmd,
goto out;
}

+ /* User copy requires addr to be unset */
+ if (ublk_support_user_copy(ubq) && ub_cmd->addr) {
+ ret = -EINVAL;
+ goto out;
+ }
+
ublk_fill_io_cmd(io, cmd, ub_cmd->addr);
ublk_mark_io_ready(ub, ubq);
break;
@@ -1470,6 +1471,13 @@ static int __ublk_ch_uring_cmd(struct io_uring_cmd *cmd,
req_op(req) == REQ_OP_READ))
goto out;
}
+
+ /* User copy requires addr to be unset */
+ if (ublk_support_user_copy(ubq) && ub_cmd->addr) {
+ ret = -EINVAL;
+ goto out;
+ }
+
ublk_fill_io_cmd(io, cmd, ub_cmd->addr);
ublk_commit_completion(ub, ub_cmd);
break;
--
2.41.0
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