http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/jffs2_fs_sb.h

/* $Id: jffs2_fs_sb.h,v 1.54 2005/09/21 13:37:34 dedekind 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> #include <linux/rwsem.h> #define JFFS2_SB_FLAG_RO 1 #define JFFS2_SB_FLAG_SCANNING 2 /* Flash scanning is in progress */ #define JFFS2_SB_FLAG_BUILDING 4 /* File system building is in progress */ 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 completion gc_thread_start; /* GC thread start completion */ 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; uint32_t wbuf_pagesize; /* 0 for NOR and other flashes with no wbuf */ #ifdef CONFIG_JFFS2_FS_WRITEBUFFER /* Write-behind buffer for NAND flash */ unsigned char *wbuf; uint32_t wbuf_ofs; uint32_t wbuf_len; struct jffs2_inodirty *wbuf_inodes; struct rw_semaphore wbuf_sem; /* Protects the write buffer */ /* Information about out-of-band area usage... */ struct nand_oobinfo *oobinfo; uint32_t badblock_pos; uint32_t fsdata_pos; uint32_t fsdata_len; #endif struct jffs2_summary *summary; /* Summary information */ /* OS-private pointer for getting back to master superblock info */ void *os_priv; }; #endif /* _JFFS2_FB_SB */