From e0da14def1ee0a9cd9c88893321e9a3d900f8e23 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Wed, 25 May 2022 06:12:18 -0600 Subject: io_uring: move statx handling to its own file Signed-off-by: Jens Axboe --- io_uring/statx.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 io_uring/statx.c (limited to 'io_uring/statx.c') diff --git a/io_uring/statx.c b/io_uring/statx.c new file mode 100644 index 000000000000..83b15687e9c5 --- /dev/null +++ b/io_uring/statx.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include + +#include + +#include "../fs/internal.h" + +#include "io_uring_types.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); + 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); + 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); + + if (sx->filename) + putname(sx->filename); +} -- cgit v1.2.3