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/* $Id: jffs2_fs_sb.h,v 1.1.1.1 2004-04-15 02:34:58 phoenix 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

#define JFFS2_SB_FLAG_MOUNTING 2

/* 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_start; /* GC thread start mutex */

        struct completion gc_thread_exit; /* GC thread exit completion port */

        //      __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 */