Merge branch 'for-5.20/io_uring' into for-5.20/io_uring-zerocopy-send

* for-5.20/io_uring: (716 commits)
  io_uring: ensure REQ_F_ISREG is set async offload
  net: fix compat pointer in get_compat_msghdr()
  io_uring: Don't require reinitable percpu_ref
  io_uring: fix types in io_recvmsg_multishot_overflow
  io_uring: Use atomic_long_try_cmpxchg in __io_account_mem
  io_uring: support multishot in recvmsg
  net: copy from user before calling __get_compat_msghdr
  net: copy from user before calling __copy_msghdr
  io_uring: support 0 length iov in buffer select in compat
  io_uring: fix multishot ending when not polled
  io_uring: add netmsg cache
  io_uring: impose max limit on apoll cache
  io_uring: add abstraction around apoll cache
  io_uring: move apoll cache to poll.c
  io_uring: consolidate hash_locked io-wq handling
  io_uring: clear REQ_F_HASH_LOCKED on hash removal
  io_uring: don't race double poll setting REQ_F_ASYNC_DATA
  io_uring: don't miss setting REQ_F_DOUBLE_POLL
  io_uring: disable multishot recvmsg
  io_uring: only trace one of complete or overflow
  ...

Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 73 insertions, 0 deletions

diff --git a/io_uring/statx.c b/io_uring/statx.c
new file mode 100644
index 000000000000..6056cd7f4876
--- /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);
+	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);
+}