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