/* $Id: jffs2_fs_sb.h,v 1.45 2003/10/08 11:46:27 dwmw2 Exp $ */#ifndef _JFFS2_FS_SB#define _JFFS2_FS_SB#include <linux/types.h>#include <linux/spinlock.h>#include <linux/workqueue.h>#include <linux/completion.h>#include <asm/semaphore.h>#include <linux/timer.h>#include <linux/wait.h>#include <linux/list.h>#define JFFS2_SB_FLAG_RO 1#define JFFS2_SB_FLAG_MOUNTING 2struct jffs2_inodirty;/* 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;	uint32_t highest_ino;	uint32_t checked_ino;	unsigned int flags;	struct task_struct *gc_task;	/* GC task struct */	struct semaphore gc_thread_start; /* GC thread start mutex */	struct completion gc_thread_exit; /* GC thread exit completion port */	struct semaphore alloc_sem;	/* Used to protect all the following 					   fields, and also to protect against					   out-of-order writing of nodes.					   And GC.					*/	uint32_t cleanmarker_size;	/* Size of an _inline_ CLEANMARKER					 (i.e. zero for OOB CLEANMARKER */	uint32_t flash_size;	uint32_t used_size;	uint32_t dirty_size;	uint32_t wasted_size;	uint32_t free_size;	uint32_t erasing_size;	uint32_t bad_size;	uint32_t sector_size;	uint32_t unchecked_size;	uint32_t nr_free_blocks;	uint32_t nr_erasing_blocks;	/* Number of free blocks there must be before we... */	uint8_t resv_blocks_write;	/* ... allow a normal filesystem write */	uint8_t resv_blocks_deletion;	/* ... allow a normal filesystem deletion */	uint8_t resv_blocks_gctrigger;	/* ... wake up the GC thread */	uint8_t resv_blocks_gcbad;	/* ... pick a block from the bad_list to GC */	uint8_t resv_blocks_gcmerge;	/* ... merge pages when garbage collecting */	uint32_t nospc_dirty_size;	uint32_t 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 very_dirty_list;	/* Blocks with lots of dirty space */	struct list_head dirty_list;		/* Blocks with some dirty space */	struct list_head erasable_list;		/* Blocks which are completely dirty, and need erasing */	struct list_head erasable_pending_wbuf_list;	/* Blocks which need erasing but only after the current wbuf is flushed */	struct list_head erasing_list;		/* Blocks which are currently erasing */	struct list_head erase_pending_list;	/* Blocks which need erasing now */	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 */	wait_queue_head_t inocache_wq;	struct jffs2_inode_cache **inocache_list;	spinlock_t inocache_lock;		/* Sem to allow jffs2_garbage_collect_deletion_dirent to	   drop the erase_completion_lock while it's holding a pointer 	   to an obsoleted node. I don't like this. Alternatives welcomed. */	struct semaphore erase_free_sem;#ifdef CONFIG_JFFS2_FS_NAND	/* Write-behind buffer for NAND flash */	unsigned char *wbuf;	uint32_t wbuf_ofs;	uint32_t wbuf_len;	uint32_t wbuf_pagesize;	struct jffs2_inodirty *wbuf_inodes;	/* Information about out-of-band area usage... */	struct nand_oobinfo *oobinfo;	uint32_t badblock_pos;	uint32_t fsdata_pos;	uint32_t fsdata_len;#endif	/* OS-private pointer for getting back to master superblock info */	void *os_priv;};#endif /* _JFFS2_FB_SB */