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-rw-r--r--io_uring/statx.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/io_uring/statx.c b/io_uring/statx.c
new file mode 100644
index 0000000000..abb874209c
--- /dev/null
+++ b/io_uring/statx.c
@@ -0,0 +1,73 @@
+// 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;
+ req->flags |= REQ_F_FORCE_ASYNC;
+ 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;
+
+ WARN_ON_ONCE(issue_flags & IO_URING_F_NONBLOCK);
+
+ 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);
+}