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From: Kanchan Joshi <[email protected]>
To: [email protected], [email protected], [email protected], [email protected]
Cc: [email protected], [email protected],
	[email protected], [email protected],
	Anuj Gupta <[email protected]>,
	Kanchan Joshi <[email protected]>
Subject: [PATCH for-next v6 1/5] io_uring: add io_uring_cmd_import_fixed
Date: Fri,  9 Sep 2022 00:05:07 +0530	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

From: Anuj Gupta <[email protected]>

This is a new helper that callers can use to obtain a bvec iterator for
the previously mapped buffer. This is preparatory work to enable
fixed-buffer support for io_uring_cmd.

Signed-off-by: Anuj Gupta <[email protected]>
Signed-off-by: Kanchan Joshi <[email protected]>
---
 include/linux/io_uring.h |  8 ++++++++
 io_uring/uring_cmd.c     | 10 ++++++++++
 2 files changed, 18 insertions(+)

diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h
index 58676c0a398f..202d90bc2c88 100644
--- a/include/linux/io_uring.h
+++ b/include/linux/io_uring.h
@@ -4,6 +4,7 @@
 
 #include <linux/sched.h>
 #include <linux/xarray.h>
+#include <uapi/linux/io_uring.h>
 
 enum io_uring_cmd_flags {
 	IO_URING_F_COMPLETE_DEFER	= 1,
@@ -32,6 +33,8 @@ struct io_uring_cmd {
 };
 
 #if defined(CONFIG_IO_URING)
+int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
+			      struct iov_iter *iter, void *ioucmd);
 void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2);
 void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
 			void (*task_work_cb)(struct io_uring_cmd *));
@@ -59,6 +62,11 @@ static inline void io_uring_free(struct task_struct *tsk)
 		__io_uring_free(tsk);
 }
 #else
+int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
+			      struct iov_iter *iter, void *ioucmd)
+{
+	return -EOPNOTSUPP;
+}
 static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
 		ssize_t ret2)
 {
diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c
index f3ed61e9bd0f..6a6d69523d75 100644
--- a/io_uring/uring_cmd.c
+++ b/io_uring/uring_cmd.c
@@ -8,6 +8,7 @@
 #include <uapi/linux/io_uring.h>
 
 #include "io_uring.h"
+#include "rsrc.h"
 #include "uring_cmd.h"
 
 static void io_uring_cmd_work(struct io_kiocb *req, bool *locked)
@@ -129,3 +130,12 @@ int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags)
 
 	return IOU_ISSUE_SKIP_COMPLETE;
 }
+
+int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
+			      struct iov_iter *iter, void *ioucmd)
+{
+	struct io_kiocb *req = cmd_to_io_kiocb(ioucmd);
+
+	return io_import_fixed(rw, iter, req->imu, ubuf, len);
+}
+EXPORT_SYMBOL_GPL(io_uring_cmd_import_fixed);
-- 
2.25.1


  parent reply	other threads:[~2022-09-08 18:45 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20220908184525epcas5p4cec88afa56beb0e5222e23c2344dbc8a@epcas5p4.samsung.com>
2022-09-08 18:35 ` [PATCH for-next v6 0/5] fixed-buffer for uring-cmd/passthru Kanchan Joshi
     [not found]   ` <CGME20220908184530epcas5p44d67b682ee86fabbb3f3912e8fde332b@epcas5p4.samsung.com>
2022-09-08 18:35     ` Kanchan Joshi [this message]
2022-09-09  2:57       ` [PATCH for-next v6 1/5] io_uring: add io_uring_cmd_import_fixed kernel test robot
2022-09-09  4:19       ` kernel test robot
     [not found]   ` <CGME20220908184532epcas5p2ca2ab735dab24937e24e44be9f440f92@epcas5p2.samsung.com>
2022-09-08 18:35     ` [PATCH for-next v6 2/5] io_uring: introduce fixed buffer support for io_uring_cmd Kanchan Joshi
     [not found]   ` <CGME20220908184535epcas5p1e1f3d8b646d88079c3a7840f79e59508@epcas5p1.samsung.com>
2022-09-08 18:35     ` [PATCH for-next v6 3/5] nvme: refactor nvme_alloc_user_request Kanchan Joshi
     [not found]   ` <CGME20220908184538epcas5p378c450bfe07d296a9abc843efe75dfc9@epcas5p3.samsung.com>
2022-09-08 18:35     ` [PATCH for-next v6 4/5] block: add helper to map bvec iterator for passthrough Kanchan Joshi
     [not found]   ` <CGME20220908184541epcas5p183b54ed38849da7abdffebade9e8be6c@epcas5p1.samsung.com>
2022-09-08 18:35     ` [PATCH for-next v6 5/5] nvme: wire up fixed buffer support for nvme passthrough Kanchan Joshi

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