[PATCH for-next v2 1/4] io_uring: introduce io_uring_cmd_import_fixed
From: Kanchan Joshi <hidden>
Date: 2022-08-20 03:17:15
Also in:
io-uring, linux-nvme
Subsystem:
io_uring, the rest · Maintainers:
Jens Axboe, Linus Torvalds
From: Anuj Gupta <redacted> 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 <redacted> Signed-off-by: Kanchan Joshi <redacted> --- include/linux/io_uring.h | 7 +++++++ io_uring/uring_cmd.c | 10 ++++++++++ 2 files changed, 17 insertions(+)
diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h
index 58676c0a398f..60aba10468fc 100644
--- a/include/linux/io_uring.h
+++ b/include/linux/io_uring.h@@ -32,6 +32,8 @@ 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 +61,11 @@ 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 -1; +} 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 8900856fa588..ff65cc8ab6cc 100644
--- a/io_uring/uring_cmd.c
+++ b/io_uring/uring_cmd.c@@ -121,3 +121,13 @@ 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 = container_of(ioucmd, struct io_kiocb, uring_cmd); + struct io_mapped_ubuf *imu = req->imu; + + return io_import_fixed(rw, iter, imu, ubuf, len); +} +EXPORT_SYMBOL_GPL(io_uring_cmd_import_fixed);
--
2.25.1