(2006-08-06) rescue-bootcd

extra/linux-2.6.10/include/linux/jffs2_fs_sb.h

@@ -0,0 +1,117 @@
+/* $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 2
+
+struct 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 */