From 81ceb082ce7b9bfb5fbe024b56a2ffa827ec19d2 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Fri, 11 Feb 2022 15:26:46 +0100
Subject: Split xloop_main into separate files for pre-5.15 and 5.15+

---
 src/kernel/xloop_main.h | 112 +++---------------------------------------------
 1 file changed, 5 insertions(+), 107 deletions(-)

(limited to 'src/kernel/xloop_main.h')

diff --git a/src/kernel/xloop_main.h b/src/kernel/xloop_main.h
index 4126460..c1cc919 100644
--- a/src/kernel/xloop_main.h
+++ b/src/kernel/xloop_main.h
@@ -1,109 +1,7 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * loop_main.h
- *
- * Written by Theodore Ts'o, 3/29/93.
- *
- * Copyright 1993 by Theodore Ts'o.  Redistribution of this file is
- * permitted under the GNU General Public License.
- */
-#ifndef _LINUX_XLOOP_H
-#define _LINUX_XLOOP_H
-
-#include <linux/bio.h>
-#include <linux/blkdev.h>
-#include <linux/blk-mq.h>
-#include <linux/spinlock.h>
-#include <linux/mutex.h>
-#include "uapi_xloop.h"
-#ifdef CONFIG_DEBUG_FS
-#include <linux/debugfs.h>
-#endif
-
-#include "xloop_file_fmt.h"
-
-/* Possible states of device */
-enum {
-	Xlo_unbound,
-	Xlo_bound,
-	Xlo_rundown,
-	Xlo_deleting,
-};
-
-struct xloop_func_table;
-
-struct xloop_device {
-	int                     xlo_number;
-	atomic_t                xlo_refcnt;
-	loff_t                  xlo_offset;
-	loff_t                  xlo_sizelimit;
-	int                     xlo_flags;
-	int                     (*transfer)(struct xloop_device *xlo, int cmd, struct page *raw_page, unsigned raw_off, struct page *xloop_page, unsigned xloop_off, int size, sector_t real_block);
-	char                    xlo_file_name[XLO_NAME_SIZE];
-	char                    xlo_crypt_name[XLO_NAME_SIZE];
-	char                    xlo_encrypt_key[XLO_KEY_SIZE];
-	int                     xlo_encrypt_key_size;
-	struct xloop_func_table *xlo_encryption;
-	__u32                   xlo_init[2];
-	kuid_t                  xlo_key_owner;	/* Who set the key */
-	int                     (*ioctl)(struct xloop_device *xlo, int cmd, unsigned long arg);
-
-	struct xloop_file_fmt   *xlo_fmt;
-
-	struct file             *xlo_backing_file;
-	struct block_device     *xlo_device;
-	void                    *key_data;
-
-	gfp_t                   old_gfp_mask;
-
-	spinlock_t              xlo_lock;
-	int                     xlo_state;
-	spinlock_t              xlo_work_lock;
-	struct workqueue_struct *workqueue;
-	struct work_struct      rootcg_work;
-	struct list_head        rootcg_cmd_list;
-	struct list_head        idle_worker_list;
-	struct rb_root          worker_tree;
-	struct timer_list       timer;
-	bool                    use_dio;
-	bool                    sysfs_inited;
-
-	struct request_queue    *xlo_queue;
-	struct blk_mq_tag_set   tag_set;
-	struct gendisk          *xlo_disk;
-	struct mutex            xlo_mutex;
-	bool                    idr_visible;
-
-#ifdef CONFIG_DEBUG_FS
-	struct dentry           *xlo_dbgfs_dir;
-#endif
-};
-
-struct xloop_cmd {
-	struct list_head           list_entry;
-	bool                       use_aio;  /* use AIO interface to handle I/O */
-	atomic_t                   ref;  /* only for aio */
-	long                       ret;
-	struct kiocb               iocb;
-	struct bio_vec             *bvec;
-	struct cgroup_subsys_state *blkcg_css;
-	struct cgroup_subsys_state *memcg_css;
-};
-
-/* Support for loadable transfer modules */
-struct xloop_func_table {
-	int           number;  /* filter type */
-	int           (*transfer)(struct xloop_device *xlo, int cmd, struct page *raw_page, unsigned raw_off, struct page *xloop_page, unsigned xloop_off, int size, sector_t real_block);
-	int           (*init)(struct xloop_device *xlo, const struct xloop_info64 *info);
-	/* release is called from xloop_unregister_transfer or clr_fd */
-	int           (*release)(struct xloop_device *xlo);
-	int           (*ioctl)(struct xloop_device *xlo, int cmd, unsigned long arg);
-	struct module *owner;
-};
-
-extern inline struct device *xloop_device_to_dev(struct xloop_device *xlo);
-
-int xloop_register_transfer(struct xloop_func_table *funcs);
-int xloop_unregister_transfer(int number);
+#include <linux/version.h>
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 15, 0)
+#include "xloop_main_4.18.h"
+#else
+#include "xloop_main_5.15.h"
 #endif
-- 
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