74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/file.h>
|
|
#include <linux/io_uring.h>
|
|
|
|
#include <uapi/linux/io_uring.h>
|
|
|
|
#include "../fs/internal.h"
|
|
|
|
#include "io_uring.h"
|
|
#include "statx.h"
|
|
|
|
struct io_statx {
|
|
struct file *file;
|
|
int dfd;
|
|
unsigned int mask;
|
|
unsigned int flags;
|
|
struct filename *filename;
|
|
struct statx __user *buffer;
|
|
};
|
|
|
|
int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
|
{
|
|
struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);
|
|
const char __user *path;
|
|
|
|
if (sqe->buf_index || sqe->splice_fd_in)
|
|
return -EINVAL;
|
|
if (req->flags & REQ_F_FIXED_FILE)
|
|
return -EBADF;
|
|
|
|
sx->dfd = READ_ONCE(sqe->fd);
|
|
sx->mask = READ_ONCE(sqe->len);
|
|
path = u64_to_user_ptr(READ_ONCE(sqe->addr));
|
|
sx->buffer = u64_to_user_ptr(READ_ONCE(sqe->addr2));
|
|
sx->flags = READ_ONCE(sqe->statx_flags);
|
|
|
|
sx->filename = getname_flags(path,
|
|
getname_statx_lookup_flags(sx->flags),
|
|
NULL);
|
|
|
|
if (IS_ERR(sx->filename)) {
|
|
int ret = PTR_ERR(sx->filename);
|
|
|
|
sx->filename = NULL;
|
|
return ret;
|
|
}
|
|
|
|
req->flags |= REQ_F_NEED_CLEANUP;
|
|
return 0;
|
|
}
|
|
|
|
int io_statx(struct io_kiocb *req, unsigned int issue_flags)
|
|
{
|
|
struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);
|
|
int ret;
|
|
|
|
if (issue_flags & IO_URING_F_NONBLOCK)
|
|
return -EAGAIN;
|
|
|
|
ret = do_statx(sx->dfd, sx->filename, sx->flags, sx->mask, sx->buffer);
|
|
io_req_set_res(req, ret, 0);
|
|
return IOU_OK;
|
|
}
|
|
|
|
void io_statx_cleanup(struct io_kiocb *req)
|
|
{
|
|
struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);
|
|
|
|
if (sx->filename)
|
|
putname(sx->filename);
|
|
}
|