patch-2.4.10 linux/include/linux/jffs2_fs_sb.h

• Lines: 85
• Date: Sun Sep 23 10:31:02 2001
• Orig file: v2.4.9/linux/include/linux/jffs2_fs_sb.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/include/linux/jffs2_fs_sb.h linux/include/linux/jffs2_fs_sb.h
@@ -0,0 +1,84 @@
+/* $Id: jffs2_fs_sb.h,v 1.15 2001/04/18 13:05:28 dwmw2 Exp $ */
+
+#ifndef _JFFS2_FS_SB
+#define _JFFS2_FS_SB
+
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <asm/semaphore.h>
+#include <linux/list.h>
+
+#define INOCACHE_HASHSIZE 1
+
+#define JFFS2_SB_FLAG_RO 1
+
+/* A struct for the overall file system control.  Pointers to
+   jffs2_sb_info structs are named `c' in the source code.  
+   Nee jffs_control
+*/
+struct jffs2_sb_info {
+	struct mtd_info *mtd;
+
+	__u32 highest_ino;
+	unsigned int flags;
+	spinlock_t nodelist_lock;
+
+	//	pid_t thread_pid;		/* GC thread's PID */
+	struct task_struct *gc_task;	/* GC task struct */
+	struct semaphore gc_thread_sem; /* GC thread startup mutex */
+	struct completion gc_thread_exit; /* GC thread exit completion */
+
+	//	__u32 gc_minfree_threshold;	/* GC trigger thresholds */
+	//	__u32 gc_maxdirty_threshold;
+
+	struct semaphore alloc_sem;	/* Used to protect all the following 
+					   fields, and also to protect against
+					   out-of-order writing of nodes.
+					   And GC.
+					*/
+	__u32 flash_size;
+	__u32 used_size;
+	__u32 dirty_size;
+	__u32 free_size;
+	__u32 erasing_size;
+	__u32 bad_size;
+	__u32 sector_size;
+	//	__u32 min_free_size;
+	//	__u32 max_chunk_size;
+
+	__u32 nr_free_blocks;
+	__u32 nr_erasing_blocks;
+
+	__u32 nr_blocks;
+	struct jffs2_eraseblock *blocks;	/* The whole array of blocks. Used for getting blocks 
+						 * from the offset (blocks[ofs / sector_size]) */
+	struct jffs2_eraseblock *nextblock;	/* The block we're currently filling */
+
+	struct jffs2_eraseblock *gcblock;	/* The block we're currently garbage-collecting */
+
+	struct list_head clean_list;		/* Blocks 100% full of clean data */
+	struct list_head dirty_list;		/* Blocks with some dirty space */
+	struct list_head erasing_list;		/* Blocks which are currently erasing */
+	struct list_head erase_pending_list;	/* Blocks which need erasing */
+	struct list_head erase_complete_list;	/* Blocks which are erased and need the clean marker written to them */
+	struct list_head free_list;		/* Blocks which are free and ready to be used */
+	struct list_head bad_list;		/* Bad blocks. */
+	struct list_head bad_used_list;		/* Bad blocks with valid data in. */
+
+	spinlock_t erase_completion_lock;	/* Protect free_list and erasing_list 
+						   against erase completion handler */
+	wait_queue_head_t erase_wait;		/* For waiting for erases to complete */
+	struct jffs2_inode_cache *inocache_list[INOCACHE_HASHSIZE];
+	spinlock_t inocache_lock;
+};
+
+#ifdef JFFS2_OUT_OF_KERNEL
+#define JFFS2_SB_INFO(sb) ((struct jffs2_sb_info *) &(sb)->u)
+#else
+#define JFFS2_SB_INFO(sb) (&sb->u.jffs2_sb)
+#endif
+
+#define OFNI_BS_2SFFJ(c)  ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) )
+
+#endif /* _JFFS2_FB_SB */