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/* $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 */
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