112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
#include <linux/fs.h>
|
||
|
|
#include <linux/file.h>
|
||
|
|
#include <linux/mm.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
#include <linux/namei.h>
|
||
|
|
#include <linux/io_uring.h>
|
||
|
|
#include <linux/fsnotify.h>
|
||
|
|
|
||
|
|
#include <uapi/linux/io_uring.h>
|
||
|
|
|
||
|
|
#include "io_uring_types.h"
|
||
|
|
#include "io_uring.h"
|
||
|
|
#include "sync.h"
|
||
|
|
|
||
|
|
struct io_sync {
|
||
|
|
struct file *file;
|
||
|
|
loff_t len;
|
||
|
|
loff_t off;
|
||
|
|
int flags;
|
||
|
|
int mode;
|
||
|
|
};
|
||
|
|
|
||
|
|
int io_sfr_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
||
|
|
{
|
||
|
|
struct io_sync *sync = io_kiocb_to_cmd(req);
|
||
|
|
|
||
|
|
if (unlikely(sqe->addr || sqe->buf_index || sqe->splice_fd_in))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
sync->off = READ_ONCE(sqe->off);
|
||
|
|
sync->len = READ_ONCE(sqe->len);
|
||
|
|
sync->flags = READ_ONCE(sqe->sync_range_flags);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_sync_file_range(struct io_kiocb *req, unsigned int issue_flags)
|
||
|
|
{
|
||
|
|
struct io_sync *sync = io_kiocb_to_cmd(req);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* sync_file_range always requires a blocking context */
|
||
|
|
if (issue_flags & IO_URING_F_NONBLOCK)
|
||
|
|
return -EAGAIN;
|
||
|
|
|
||
|
|
ret = sync_file_range(req->file, sync->off, sync->len, sync->flags);
|
||
|
|
io_req_set_res(req, ret, 0);
|
||
|
|
return IOU_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_fsync_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
||
|
|
{
|
||
|
|
struct io_sync *sync = io_kiocb_to_cmd(req);
|
||
|
|
|
||
|
|
if (unlikely(sqe->addr || sqe->buf_index || sqe->splice_fd_in))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
sync->flags = READ_ONCE(sqe->fsync_flags);
|
||
|
|
if (unlikely(sync->flags & ~IORING_FSYNC_DATASYNC))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
sync->off = READ_ONCE(sqe->off);
|
||
|
|
sync->len = READ_ONCE(sqe->len);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_fsync(struct io_kiocb *req, unsigned int issue_flags)
|
||
|
|
{
|
||
|
|
struct io_sync *sync = io_kiocb_to_cmd(req);
|
||
|
|
loff_t end = sync->off + sync->len;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* fsync always requires a blocking context */
|
||
|
|
if (issue_flags & IO_URING_F_NONBLOCK)
|
||
|
|
return -EAGAIN;
|
||
|
|
|
||
|
|
ret = vfs_fsync_range(req->file, sync->off, end > 0 ? end : LLONG_MAX,
|
||
|
|
sync->flags & IORING_FSYNC_DATASYNC);
|
||
|
|
io_req_set_res(req, ret, 0);
|
||
|
|
return IOU_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_fallocate_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
||
|
|
{
|
||
|
|
struct io_sync *sync = io_kiocb_to_cmd(req);
|
||
|
|
|
||
|
|
if (sqe->buf_index || sqe->rw_flags || sqe->splice_fd_in)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
sync->off = READ_ONCE(sqe->off);
|
||
|
|
sync->len = READ_ONCE(sqe->addr);
|
||
|
|
sync->mode = READ_ONCE(sqe->len);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_fallocate(struct io_kiocb *req, unsigned int issue_flags)
|
||
|
|
{
|
||
|
|
struct io_sync *sync = io_kiocb_to_cmd(req);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* fallocate always requiring blocking context */
|
||
|
|
if (issue_flags & IO_URING_F_NONBLOCK)
|
||
|
|
return -EAGAIN;
|
||
|
|
ret = vfs_fallocate(req->file, sync->mode, sync->off, sync->len);
|
||
|
|
if (ret >= 0)
|
||
|
|
fsnotify_modify(req->file);
|
||
|
|
io_req_set_res(req, ret, 0);
|
||
|
|
return IOU_OK;
|
||
|
|
}
|