diff options
Diffstat (limited to 'fs/jffs2/jffs2_fs_sb.h')
-rw-r--r-- | fs/jffs2/jffs2_fs_sb.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/fs/jffs2/jffs2_fs_sb.h b/fs/jffs2/jffs2_fs_sb.h new file mode 100644 index 000000000000..4bcfb5570221 --- /dev/null +++ b/fs/jffs2/jffs2_fs_sb.h | |||
@@ -0,0 +1,122 @@ | |||
1 | /* $Id: jffs2_fs_sb.h,v 1.54 2005/09/21 13:37:34 dedekind Exp $ */ | ||
2 | |||
3 | #ifndef _JFFS2_FS_SB | ||
4 | #define _JFFS2_FS_SB | ||
5 | |||
6 | #include <linux/types.h> | ||
7 | #include <linux/spinlock.h> | ||
8 | #include <linux/workqueue.h> | ||
9 | #include <linux/completion.h> | ||
10 | #include <asm/semaphore.h> | ||
11 | #include <linux/timer.h> | ||
12 | #include <linux/wait.h> | ||
13 | #include <linux/list.h> | ||
14 | #include <linux/rwsem.h> | ||
15 | |||
16 | #define JFFS2_SB_FLAG_RO 1 | ||
17 | #define JFFS2_SB_FLAG_SCANNING 2 /* Flash scanning is in progress */ | ||
18 | #define JFFS2_SB_FLAG_BUILDING 4 /* File system building is in progress */ | ||
19 | |||
20 | struct jffs2_inodirty; | ||
21 | |||
22 | /* A struct for the overall file system control. Pointers to | ||
23 | jffs2_sb_info structs are named `c' in the source code. | ||
24 | Nee jffs_control | ||
25 | */ | ||
26 | struct jffs2_sb_info { | ||
27 | struct mtd_info *mtd; | ||
28 | |||
29 | uint32_t highest_ino; | ||
30 | uint32_t checked_ino; | ||
31 | |||
32 | unsigned int flags; | ||
33 | |||
34 | struct task_struct *gc_task; /* GC task struct */ | ||
35 | struct completion gc_thread_start; /* GC thread start completion */ | ||
36 | struct completion gc_thread_exit; /* GC thread exit completion port */ | ||
37 | |||
38 | struct semaphore alloc_sem; /* Used to protect all the following | ||
39 | fields, and also to protect against | ||
40 | out-of-order writing of nodes. And GC. */ | ||
41 | uint32_t cleanmarker_size; /* Size of an _inline_ CLEANMARKER | ||
42 | (i.e. zero for OOB CLEANMARKER */ | ||
43 | |||
44 | uint32_t flash_size; | ||
45 | uint32_t used_size; | ||
46 | uint32_t dirty_size; | ||
47 | uint32_t wasted_size; | ||
48 | uint32_t free_size; | ||
49 | uint32_t erasing_size; | ||
50 | uint32_t bad_size; | ||
51 | uint32_t sector_size; | ||
52 | uint32_t unchecked_size; | ||
53 | |||
54 | uint32_t nr_free_blocks; | ||
55 | uint32_t nr_erasing_blocks; | ||
56 | |||
57 | /* Number of free blocks there must be before we... */ | ||
58 | uint8_t resv_blocks_write; /* ... allow a normal filesystem write */ | ||
59 | uint8_t resv_blocks_deletion; /* ... allow a normal filesystem deletion */ | ||
60 | uint8_t resv_blocks_gctrigger; /* ... wake up the GC thread */ | ||
61 | uint8_t resv_blocks_gcbad; /* ... pick a block from the bad_list to GC */ | ||
62 | uint8_t resv_blocks_gcmerge; /* ... merge pages when garbage collecting */ | ||
63 | |||
64 | uint32_t nospc_dirty_size; | ||
65 | |||
66 | uint32_t nr_blocks; | ||
67 | struct jffs2_eraseblock *blocks; /* The whole array of blocks. Used for getting blocks | ||
68 | * from the offset (blocks[ofs / sector_size]) */ | ||
69 | struct jffs2_eraseblock *nextblock; /* The block we're currently filling */ | ||
70 | |||
71 | struct jffs2_eraseblock *gcblock; /* The block we're currently garbage-collecting */ | ||
72 | |||
73 | struct list_head clean_list; /* Blocks 100% full of clean data */ | ||
74 | struct list_head very_dirty_list; /* Blocks with lots of dirty space */ | ||
75 | struct list_head dirty_list; /* Blocks with some dirty space */ | ||
76 | struct list_head erasable_list; /* Blocks which are completely dirty, and need erasing */ | ||
77 | struct list_head erasable_pending_wbuf_list; /* Blocks which need erasing but only after the current wbuf is flushed */ | ||
78 | struct list_head erasing_list; /* Blocks which are currently erasing */ | ||
79 | struct list_head erase_pending_list; /* Blocks which need erasing now */ | ||
80 | struct list_head erase_complete_list; /* Blocks which are erased and need the clean marker written to them */ | ||
81 | struct list_head free_list; /* Blocks which are free and ready to be used */ | ||
82 | struct list_head bad_list; /* Bad blocks. */ | ||
83 | struct list_head bad_used_list; /* Bad blocks with valid data in. */ | ||
84 | |||
85 | spinlock_t erase_completion_lock; /* Protect free_list and erasing_list | ||
86 | against erase completion handler */ | ||
87 | wait_queue_head_t erase_wait; /* For waiting for erases to complete */ | ||
88 | |||
89 | wait_queue_head_t inocache_wq; | ||
90 | struct jffs2_inode_cache **inocache_list; | ||
91 | spinlock_t inocache_lock; | ||
92 | |||
93 | /* Sem to allow jffs2_garbage_collect_deletion_dirent to | ||
94 | drop the erase_completion_lock while it's holding a pointer | ||
95 | to an obsoleted node. I don't like this. Alternatives welcomed. */ | ||
96 | struct semaphore erase_free_sem; | ||
97 | |||
98 | uint32_t wbuf_pagesize; /* 0 for NOR and other flashes with no wbuf */ | ||
99 | |||
100 | #ifdef CONFIG_JFFS2_FS_WRITEBUFFER | ||
101 | /* Write-behind buffer for NAND flash */ | ||
102 | unsigned char *wbuf; | ||
103 | uint32_t wbuf_ofs; | ||
104 | uint32_t wbuf_len; | ||
105 | struct jffs2_inodirty *wbuf_inodes; | ||
106 | |||
107 | struct rw_semaphore wbuf_sem; /* Protects the write buffer */ | ||
108 | |||
109 | /* Information about out-of-band area usage... */ | ||
110 | struct nand_oobinfo *oobinfo; | ||
111 | uint32_t badblock_pos; | ||
112 | uint32_t fsdata_pos; | ||
113 | uint32_t fsdata_len; | ||
114 | #endif | ||
115 | |||
116 | struct jffs2_summary *summary; /* Summary information */ | ||
117 | |||
118 | /* OS-private pointer for getting back to master superblock info */ | ||
119 | void *os_priv; | ||
120 | }; | ||
121 | |||
122 | #endif /* _JFFS2_FB_SB */ | ||