fuse: split off fuse_args and related definitions into a separate header

This is going to be used by both layers (transport and filesystem)

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

fs/fuse/args.h

@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _FS_FUSE_ARGS_H
+#define _FS_FUSE_ARGS_H
+
+#include <linux/types.h>
+
+struct fuse_mount;
+
+/** One input argument of a request */
+struct fuse_in_arg {
+	unsigned size;
+	const void *value;
+};
+
+/** One output argument of a request */
+struct fuse_arg {
+	unsigned size;
+	void *value;
+};
+
+struct fuse_args {
+	u64 nodeid;
+	u32 opcode;
+	u32 uid;
+	u32 gid;
+	u32 pid;
+	u8 in_numargs;
+	u8 out_numargs;
+	u8 ext_idx;
+	bool force:1;
+	bool noreply:1;
+	bool nocreds:1;
+	bool in_pages:1;
+	bool out_pages:1;
+	bool user_pages:1;
+	bool out_argvar:1;
+	bool page_zeroing:1;
+	bool page_replace:1;
+	bool may_block:1;
+	bool is_ext:1;
+	bool is_pinned:1;
+	bool invalidate_vmap:1;
+	bool abort_on_kill:1;
+	struct fuse_in_arg in_args[4];
+	struct fuse_arg out_args[2];
+	void (*end)(struct fuse_mount *fm, struct fuse_args *args, int error);
+	/* Used for kvec iter backed by vmalloc address */
+	void *vmap_base;
+};
+
+/** FUSE folio descriptor */
+struct fuse_folio_desc {
+	unsigned int length;
+	unsigned int offset;
+};
+
+struct fuse_args_pages {
+	struct fuse_args args;
+	struct folio **folios;
+	struct fuse_folio_desc *descs;
+	unsigned int num_folios;
+};
+
+#endif /* _FS_FUSE_ARGS_H */

fs/fuse/fuse_i.h

@@ -13,6 +13,7 @@
 # define pr_fmt(fmt) "fuse: " fmt
 #endif
 
+#include "args.h"
 #include <linux/fuse.h>
 #include <linux/fs.h>
 #include <linux/mount.h>
@@ -288,58 +289,6 @@ struct fuse_file {
 	bool flock:1;
 };
 
-/** One input argument of a request */
-struct fuse_in_arg {
-	unsigned size;
-	const void *value;
-};
-
-/** One output argument of a request */
-struct fuse_arg {
-	unsigned size;
-	void *value;
-};
-
-/** FUSE folio descriptor */
-struct fuse_folio_desc {
-	unsigned int length;
-	unsigned int offset;
-};
-
-struct fuse_args {
-	uint64_t nodeid;
-	uint32_t opcode;
-	uint8_t in_numargs;
-	uint8_t out_numargs;
-	uint8_t ext_idx;
-	bool force:1;
-	bool noreply:1;
-	bool nocreds:1;
-	bool in_pages:1;
-	bool out_pages:1;
-	bool user_pages:1;
-	bool out_argvar:1;
-	bool page_zeroing:1;
-	bool page_replace:1;
-	bool may_block:1;
-	bool is_ext:1;
-	bool is_pinned:1;
-	bool invalidate_vmap:1;
-	bool abort_on_kill:1;
-	struct fuse_in_arg in_args[4];
-	struct fuse_arg out_args[2];
-	void (*end)(struct fuse_mount *fm, struct fuse_args *args, int error);
-	/* Used for kvec iter backed by vmalloc address */
-	void *vmap_base;
-};
-
-struct fuse_args_pages {
-	struct fuse_args args;
-	struct folio **folios;
-	struct fuse_folio_desc *descs;
-	unsigned int num_folios;
-};
-
 struct fuse_release_args {
 	struct fuse_args args;
 	struct fuse_release_in inarg;