io_uring: move statx handling to its own file

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

io_uring/Makefile

@@ -4,5 +4,6 @@
 
 obj-$(CONFIG_IO_URING)		+= io_uring.o xattr.o nop.o fs.o splice.o \
 					sync.o advise.o filetable.o \
-					openclose.o uring_cmd.o epoll.o
+					openclose.o uring_cmd.o epoll.o \
+					statx.o
 obj-$(CONFIG_IO_WQ)		+= io-wq.o

io_uring/io_uring.c

@@ -101,6 +101,7 @@
 #include "openclose.h"
 #include "uring_cmd.h"
 #include "epoll.h"
+#include "statx.h"
 
 #define IORING_MAX_ENTRIES	32768
 #define IORING_MAX_CQ_ENTRIES	(2 * IORING_MAX_ENTRIES)
@@ -384,15 +385,6 @@ struct io_provide_buf {
 	__u16				bid;
 };
 
-struct io_statx {
-	struct file			*file;
-	int				dfd;
-	unsigned int			mask;
-	unsigned int			flags;
-	struct filename			*filename;
-	struct statx __user		*buffer;
-};
-
 struct io_shutdown {
 	struct file			*file;
 	int				how;
@@ -4033,58 +4025,6 @@ static __maybe_unused int io_eopnotsupp_prep(struct io_kiocb *kiocb,
 	return -EOPNOTSUPP;
 }
 
-static 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;
-}
-
-static 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;
-}
-
-static void io_statx_cleanup(struct io_kiocb *req)
-{
-	struct io_statx *sx = io_kiocb_to_cmd(req);
-
-	if (sx->filename)
-		putname(sx->filename);
-}
-
 #if defined(CONFIG_NET)
 static int io_shutdown_prep(struct io_kiocb *req,
 			    const struct io_uring_sqe *sqe)

io_uring/statx.c

@@ -0,0 +1,74 @@
+// 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_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);
+}

io_uring/statx.h

@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+
+int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
+int io_statx(struct io_kiocb *req, unsigned int issue_flags);
+void io_statx_cleanup(struct io_kiocb *req);