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| 2 | #ifndef _JFFS2_FS_SB |
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| 3 | #define _JFFS2_FS_SB |
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| 4 | |
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| 5 | #include <linux/types.h> |
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| 6 | #include <linux/workqueue.h> |
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| 7 | #include <asm/semaphore.h> |
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| 8 | #include <linux/wait.h> |
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| 9 | |
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| 10 | #define JFFS2_SB_FLAG_RO 1 |
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| 11 | #define JFFS2_SB_FLAG_MOUNTING 2 |
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| 12 | |
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| 13 | struct jffs2_inodirty; |
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| 14 | |
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| 15 | /* A struct for the overall file system control. Pointers to |
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| 16 | jffs2_sb_info structs are named `c' in the source code. |
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| 17 | Nee jffs_control |
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| 18 | */ |
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| 19 | struct jffs2_sb_info { |
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| 20 | struct mtd_info *mtd; |
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| 21 | |
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| 22 | uint32_t highest_ino; |
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| 23 | uint32_t checked_ino; |
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| 24 | |
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| 25 | unsigned int flags; |
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| 26 | |
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| 27 | struct task_struct *gc_task; /* GC task struct */ |
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| 28 | struct semaphore gc_thread_start; /* GC thread start mutex */ |
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| 29 | struct completion gc_thread_exit; /* GC thread exit completion port */ |
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| 30 | |
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| 31 | struct semaphore alloc_sem; /* Used to protect all the following |
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| 32 | fields, and also to protect against |
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| 33 | out-of-order writing of nodes. And GC. */ |
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| 34 | uint32_t cleanmarker_size; /* Size of an _inline_ CLEANMARKER |
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| 35 | (i.e. zero for OOB CLEANMARKER */ |
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| 36 | |
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| 37 | uint32_t flash_size; |
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| 38 | uint32_t used_size; |
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| 39 | uint32_t dirty_size; |
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| 40 | uint32_t wasted_size; |
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| 41 | uint32_t free_size; |
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| 42 | uint32_t erasing_size; |
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| 43 | uint32_t bad_size; |
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| 44 | uint32_t sector_size; |
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| 45 | uint32_t unchecked_size; |
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| 46 | |
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| 47 | uint32_t nr_free_blocks; |
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| 48 | uint32_t nr_erasing_blocks; |
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| 49 | |
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| 50 | /* Number of free blocks there must be before we... */ |
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| 51 | uint8_t resv_blocks_write; /* ... allow a normal filesystem write */ |
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| 52 | uint8_t resv_blocks_deletion; /* ... allow a normal filesystem deletion */ |
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| 53 | uint8_t resv_blocks_gctrigger; /* ... wake up the GC thread */ |
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| 54 | uint8_t resv_blocks_gcbad; /* ... pick a block from the bad_list to GC */ |
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| 55 | uint8_t resv_blocks_gcmerge; /* ... merge pages when garbage collecting */ |
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| 56 | |
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| 57 | uint32_t nospc_dirty_size; |
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| 58 | |
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| 59 | uint32_t nr_blocks; |
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| 60 | struct jffs2_eraseblock *blocks; /* The whole array of blocks. Used for getting blocks |
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| 61 | * from the offset (blocks[ofs / sector_size]) */ |
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| 62 | struct jffs2_eraseblock *nextblock; /* The block we're currently filling */ |
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| 63 | |
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| 64 | struct jffs2_eraseblock *gcblock; /* The block we're currently garbage-collecting */ |
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| 65 | |
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| 66 | struct list_head clean_list; /* Blocks 100% full of clean data */ |
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| 67 | struct list_head very_dirty_list; /* Blocks with lots of dirty space */ |
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| 68 | struct list_head dirty_list; /* Blocks with some dirty space */ |
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| 69 | struct list_head erasable_list; /* Blocks which are completely dirty, and need erasing */ |
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| 70 | struct list_head erasable_pending_wbuf_list; /* Blocks which need erasing but only after the current wbuf is flushed */ |
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| 71 | struct list_head erasing_list; /* Blocks which are currently erasing */ |
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| 72 | struct list_head erase_pending_list; /* Blocks which need erasing now */ |
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| 73 | struct list_head erase_complete_list; /* Blocks which are erased and need the clean marker written to them */ |
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| 74 | struct list_head free_list; /* Blocks which are free and ready to be used */ |
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| 75 | struct list_head bad_list; /* Bad blocks. */ |
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| 76 | struct list_head bad_used_list; /* Bad blocks with valid data in. */ |
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| 77 | |
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| 78 | spinlock_t erase_completion_lock; /* Protect free_list and erasing_list |
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| 79 | against erase completion handler */ |
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| 80 | wait_queue_head_t erase_wait; /* For waiting for erases to complete */ |
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| 81 | |
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| 82 | wait_queue_head_t inocache_wq; |
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| 83 | struct jffs2_inode_cache **inocache_list; |
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| 84 | spinlock_t inocache_lock; |
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| 85 | |
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| 86 | /* Sem to allow jffs2_garbage_collect_deletion_dirent to |
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| 87 | drop the erase_completion_lock while it's holding a pointer |
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| 88 | to an obsoleted node. I don't like this. Alternatives welcomed. */ |
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| 89 | struct semaphore erase_free_sem; |
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| 90 | |
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| 91 | #if defined CONFIG_JFFS2_FS_NAND || defined CONFIG_JFFS2_FS_NOR_ECC |
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| 92 | /* Write-behind buffer for NAND flash */ |
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| 93 | unsigned char *wbuf; |
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| 94 | uint32_t wbuf_ofs; |
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| 95 | uint32_t wbuf_len; |
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| 96 | uint32_t wbuf_pagesize; |
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| 97 | struct jffs2_inodirty *wbuf_inodes; |
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| 98 | |
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| 99 | struct rw_semaphore wbuf_sem; /* Protects the write buffer */ |
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| 100 | |
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| 101 | /* Information about out-of-band area usage... */ |
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| 102 | struct nand_oobinfo *oobinfo; |
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| 103 | uint32_t badblock_pos; |
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| 104 | uint32_t fsdata_pos; |
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| 105 | uint32_t fsdata_len; |
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| 106 | #endif |
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| 107 | |
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| 108 | /* OS-private pointer for getting back to master superblock info */ |
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| 109 | void *os_priv; |
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| 110 | }; |
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| 111 | |
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| 112 | #endif /* _JFFS2_FB_SB */ |
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