85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
/* $Id: jffs2_fs_sb.h,v 1.16.2.1 2002/02/23 14:13:34 dwmw2 Exp $ */
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#ifndef _JFFS2_FS_SB
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#define _JFFS2_FS_SB
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <asm/semaphore.h>
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#include <linux/list.h>
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#define INOCACHE_HASHSIZE 1
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#define JFFS2_SB_FLAG_RO 1
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#define JFFS2_SB_FLAG_MOUNTING 2
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/* A struct for the overall file system control. Pointers to
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jffs2_sb_info structs are named `c' in the source code.
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Nee jffs_control
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*/
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struct jffs2_sb_info {
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struct mtd_info *mtd;
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__u32 highest_ino;
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unsigned int flags;
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spinlock_t nodelist_lock;
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// pid_t thread_pid; /* GC thread's PID */
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struct task_struct *gc_task; /* GC task struct */
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struct semaphore gc_thread_start; /* GC thread start mutex */
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struct completion gc_thread_exit; /* GC thread exit completion port */
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// __u32 gc_minfree_threshold; /* GC trigger thresholds */
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// __u32 gc_maxdirty_threshold;
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struct semaphore alloc_sem; /* Used to protect all the following
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fields, and also to protect against
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out-of-order writing of nodes.
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And GC.
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*/
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__u32 flash_size;
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__u32 used_size;
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__u32 dirty_size;
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__u32 free_size;
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__u32 erasing_size;
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__u32 bad_size;
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__u32 sector_size;
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// __u32 min_free_size;
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// __u32 max_chunk_size;
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__u32 nr_free_blocks;
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__u32 nr_erasing_blocks;
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__u32 nr_blocks;
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struct jffs2_eraseblock *blocks; /* The whole array of blocks. Used for getting blocks
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* from the offset (blocks[ofs / sector_size]) */
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struct jffs2_eraseblock *nextblock; /* The block we're currently filling */
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struct jffs2_eraseblock *gcblock; /* The block we're currently garbage-collecting */
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struct list_head clean_list; /* Blocks 100% full of clean data */
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struct list_head dirty_list; /* Blocks with some dirty space */
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struct list_head erasing_list; /* Blocks which are currently erasing */
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struct list_head erase_pending_list; /* Blocks which need erasing */
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struct list_head erase_complete_list; /* Blocks which are erased and need the clean marker written to them */
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struct list_head free_list; /* Blocks which are free and ready to be used */
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struct list_head bad_list; /* Bad blocks. */
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struct list_head bad_used_list; /* Bad blocks with valid data in. */
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spinlock_t erase_completion_lock; /* Protect free_list and erasing_list
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against erase completion handler */
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wait_queue_head_t erase_wait; /* For waiting for erases to complete */
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struct jffs2_inode_cache *inocache_list[INOCACHE_HASHSIZE];
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spinlock_t inocache_lock;
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};
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#ifdef JFFS2_OUT_OF_KERNEL
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#define JFFS2_SB_INFO(sb) ((struct jffs2_sb_info *) &(sb)->u)
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#else
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#define JFFS2_SB_INFO(sb) (&sb->u.jffs2_sb)
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#endif
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#define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) )
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#endif /* _JFFS2_FB_SB */
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