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From: Sidong Yang <sidong.yang@furiosa.ai>
To: Josef Bacik <josef@toxicpanda.com>,
David Sterba <dsterba@suse.com>,
Jens Axboe <axboe@kernel.dk>,
Pavel Begunkov <asml.silence@gmail.com>
Cc: linux-btrfs@vger.kernel.org,
linux-kernel@vger.kernel.org,
io-uring@vger.kernel.org,
Sidong Yang <sidong.yang@furiosa.ai>
Subject: [RFC PATCH v4 3/5] io-uring/cmd: introduce io_uring_cmd_import_fixed_vec
Date: Mon, 17 Mar 2025 13:57:40 +0000
Message-ID: <20250317135742.4331-4-sidong.yang@furiosa.ai>
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io_uring_cmd_import_fixed_vec() could be used for using multiple
fixed buffer in uring_cmd callback.
Signed-off-by: Sidong Yang <sidong.yang@furiosa.ai>
---
include/linux/io_uring/cmd.h | 14 ++++++++++++++
io_uring/uring_cmd.c | 19 +++++++++++++++++++
2 files changed, 33 insertions(+)
diff --git a/include/linux/io_uring/cmd.h b/include/linux/io_uring/cmd.h
index 598cacda4aa3..ab7ecef60787 100644
--- a/include/linux/io_uring/cmd.h
+++ b/include/linux/io_uring/cmd.h
@@ -44,6 +44,12 @@ int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
struct io_uring_cmd *ioucmd,
unsigned int issue_flags);
+int io_uring_cmd_import_fixed_vec(struct io_uring_cmd *ioucmd,
+ const struct iovec __user *uvec,
+ unsigned long uvec_segs, int ddir,
+ unsigned int issue_flags,
+ struct iov_iter *iter);
+
/*
* Completes the request, i.e. posts an io_uring CQE and deallocates @ioucmd
* and the corresponding io_uring request.
@@ -76,6 +82,14 @@ io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
{
return -EOPNOTSUPP;
}
+int io_uring_cmd_import_fixed_vec(struct io_uring_cmd *ioucmd,
+ const struct iovec __user *uvec,
+ unsigned long uvec_segs, int ddir,
+ unsigned int issue_flags,
+ struct iov_iter *iter)
+{
+ return -EOPNOTSUPP;
+}
static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
u64 ret2, unsigned issue_flags)
{
diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c
index bf4002e93ec5..effcd01b8a35 100644
--- a/io_uring/uring_cmd.c
+++ b/io_uring/uring_cmd.c
@@ -274,6 +274,25 @@ int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
}
EXPORT_SYMBOL_GPL(io_uring_cmd_import_fixed);
+int io_uring_cmd_import_fixed_vec(struct io_uring_cmd *ioucmd,
+ const struct iovec __user *uvec,
+ unsigned long uvec_segs, int ddir,
+ unsigned int issue_flags,
+ struct iov_iter *iter)
+{
+ struct io_kiocb *req = cmd_to_io_kiocb(ioucmd);
+ struct io_async_cmd *ac = req->async_data;
+ int ret;
+
+ ret = io_prep_reg_iovec(req, &ac->iou_vec, uvec, uvec_segs);
+ if (ret)
+ return ret;
+
+ return io_import_reg_vec(ddir, iter, req, &ac->iou_vec, ac->iou_vec.nr,
+ issue_flags);
+}
+EXPORT_SYMBOL_GPL(io_uring_cmd_import_fixed_vec);
+
void io_uring_cmd_issue_blocking(struct io_uring_cmd *ioucmd)
{
struct io_kiocb *req = cmd_to_io_kiocb(ioucmd);
--
2.43.0