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1// SPDX-License-Identifier: GPL-2.02#include <linux/kernel.h>3#include <linux/errno.h>4#include <linux/file.h>5#include <linux/io_uring.h>6 7#include <uapi/linux/io_uring.h>8 9#include "../fs/internal.h"10 11#include "io_uring.h"12#include "statx.h"13 14struct io_statx {15 struct file *file;16 int dfd;17 unsigned int mask;18 unsigned int flags;19 struct filename *filename;20 struct statx __user *buffer;21};22 23int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)24{25 struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);26 const char __user *path;27 28 if (sqe->buf_index || sqe->splice_fd_in)29 return -EINVAL;30 if (req->flags & REQ_F_FIXED_FILE)31 return -EBADF;32 33 sx->dfd = READ_ONCE(sqe->fd);34 sx->mask = READ_ONCE(sqe->len);35 path = u64_to_user_ptr(READ_ONCE(sqe->addr));36 sx->buffer = u64_to_user_ptr(READ_ONCE(sqe->addr2));37 sx->flags = READ_ONCE(sqe->statx_flags);38 39 sx->filename = getname_flags(path,40 getname_statx_lookup_flags(sx->flags));41 42 if (IS_ERR(sx->filename)) {43 int ret = PTR_ERR(sx->filename);44 45 sx->filename = NULL;46 return ret;47 }48 49 req->flags |= REQ_F_NEED_CLEANUP;50 req->flags |= REQ_F_FORCE_ASYNC;51 return 0;52}53 54int io_statx(struct io_kiocb *req, unsigned int issue_flags)55{56 struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);57 int ret;58 59 WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);60 61 ret = do_statx(sx->dfd, sx->filename, sx->flags, sx->mask, sx->buffer);62 io_req_set_res(req, ret, 0);63 return IOU_OK;64}65 66void io_statx_cleanup(struct io_kiocb *req)67{68 struct io_statx *sx = io_kiocb_to_cmd(req, struct io_statx);69 70 if (sx->filename)71 putname(sx->filename);72}73