--- /dev/null
+/* $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;
+ unsigned char *oobbuf;
+ 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_ecclayout *ecclayout;
+ uint32_t badblock_pos;
+ uint32_t fsdata_pos;
+ uint32_t fsdata_len;
+#endif
+
+ struct jffs2_summary *summary; /* Summary information */
+
+#ifdef CONFIG_JFFS2_FS_XATTR
+#define XATTRINDEX_HASHSIZE (57)
+ uint32_t highest_xid;
+ uint32_t highest_xseqno;
+ struct list_head xattrindex[XATTRINDEX_HASHSIZE];
+ struct list_head xattr_unchecked;
+ struct list_head xattr_dead_list;
+ struct jffs2_xattr_ref *xref_dead_list;
+ struct jffs2_xattr_ref *xref_temp;
+ struct rw_semaphore xattr_sem;
+ uint32_t xdatum_mem_usage;
+ uint32_t xdatum_mem_threshold;
+#endif
+ /* OS-private pointer for getting back to master superblock info */
+ void *os_priv;
+};
+
+#endif /* _JFFS2_FB_SB */
git://git.onelab.eu / linux-2.6.git / blobdiff