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authorAnuj Gupta <anuj20.g@samsung.com>2022-09-30 09:27:38 +0300
committerJens Axboe <axboe@kernel.dk>2022-09-30 16:49:11 +0300
commita9216fac3ed8819cbbda5d39dd5fcaa43dfd35d8 (patch)
tree7fcfeafad737335ed0dedcd43375932aa7221a74
parent851eb780decb7180bcf09fad0035cba9aae669df (diff)
downloadlinux-a9216fac3ed8819cbbda5d39dd5fcaa43dfd35d8.tar.xz
io_uring: add io_uring_cmd_import_fixed
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 <anuj20.g@samsung.com> Signed-off-by: Kanchan Joshi <joshi.k@samsung.com> Link: https://lore.kernel.org/r/20220930062749.152261-2-anuj20.g@samsung.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--include/linux/io_uring.h8
-rw-r--r--io_uring/uring_cmd.c10
2 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h
index 58676c0a398f..1dbf51115c30 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
+static 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);