Commit | Line | Data |
---|---|---|
c00c310e DW |
1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. | |
3 | * | |
4 | * Copyright © 2001-2007 Red Hat, Inc. | |
6088c058 | 5 | * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org> |
c00c310e DW |
6 | * |
7 | * Created by David Woodhouse <dwmw2@infradead.org> | |
8 | * | |
9 | * For licensing information, see the file 'LICENCE' in this directory. | |
10 | * | |
11 | */ | |
1da177e4 LT |
12 | |
13 | #ifndef _JFFS2_FS_SB | |
14 | #define _JFFS2_FS_SB | |
15 | ||
16 | #include <linux/types.h> | |
17 | #include <linux/spinlock.h> | |
18 | #include <linux/workqueue.h> | |
19 | #include <linux/completion.h> | |
ced22070 | 20 | #include <linux/mutex.h> |
1da177e4 LT |
21 | #include <linux/timer.h> |
22 | #include <linux/wait.h> | |
23 | #include <linux/list.h> | |
24 | #include <linux/rwsem.h> | |
25 | ||
26 | #define JFFS2_SB_FLAG_RO 1 | |
31fbdf7a AB |
27 | #define JFFS2_SB_FLAG_SCANNING 2 /* Flash scanning is in progress */ |
28 | #define JFFS2_SB_FLAG_BUILDING 4 /* File system building is in progress */ | |
1da177e4 LT |
29 | |
30 | struct jffs2_inodirty; | |
31 | ||
92abc475 AS |
32 | struct jffs2_mount_opts { |
33 | bool override_compr; | |
34 | unsigned int compr; | |
35 | }; | |
36 | ||
1da177e4 | 37 | /* A struct for the overall file system control. Pointers to |
182ec4ee | 38 | jffs2_sb_info structs are named `c' in the source code. |
1da177e4 LT |
39 | Nee jffs_control |
40 | */ | |
41 | struct jffs2_sb_info { | |
42 | struct mtd_info *mtd; | |
43 | ||
44 | uint32_t highest_ino; | |
45 | uint32_t checked_ino; | |
46 | ||
47 | unsigned int flags; | |
48 | ||
49 | struct task_struct *gc_task; /* GC task struct */ | |
fff7afd7 | 50 | struct completion gc_thread_start; /* GC thread start completion */ |
1da177e4 LT |
51 | struct completion gc_thread_exit; /* GC thread exit completion port */ |
52 | ||
ced22070 | 53 | struct mutex alloc_sem; /* Used to protect all the following |
1da177e4 LT |
54 | fields, and also to protect against |
55 | out-of-order writing of nodes. And GC. */ | |
56 | uint32_t cleanmarker_size; /* Size of an _inline_ CLEANMARKER | |
57 | (i.e. zero for OOB CLEANMARKER */ | |
58 | ||
59 | uint32_t flash_size; | |
60 | uint32_t used_size; | |
61 | uint32_t dirty_size; | |
62 | uint32_t wasted_size; | |
63 | uint32_t free_size; | |
64 | uint32_t erasing_size; | |
65 | uint32_t bad_size; | |
66 | uint32_t sector_size; | |
67 | uint32_t unchecked_size; | |
68 | ||
69 | uint32_t nr_free_blocks; | |
70 | uint32_t nr_erasing_blocks; | |
71 | ||
72 | /* Number of free blocks there must be before we... */ | |
73 | uint8_t resv_blocks_write; /* ... allow a normal filesystem write */ | |
74 | uint8_t resv_blocks_deletion; /* ... allow a normal filesystem deletion */ | |
75 | uint8_t resv_blocks_gctrigger; /* ... wake up the GC thread */ | |
76 | uint8_t resv_blocks_gcbad; /* ... pick a block from the bad_list to GC */ | |
77 | uint8_t resv_blocks_gcmerge; /* ... merge pages when garbage collecting */ | |
8fb870df DW |
78 | /* Number of 'very dirty' blocks before we trigger immediate GC */ |
79 | uint8_t vdirty_blocks_gctrigger; | |
1da177e4 LT |
80 | |
81 | uint32_t nospc_dirty_size; | |
82 | ||
83 | uint32_t nr_blocks; | |
182ec4ee | 84 | struct jffs2_eraseblock *blocks; /* The whole array of blocks. Used for getting blocks |
1da177e4 LT |
85 | * from the offset (blocks[ofs / sector_size]) */ |
86 | struct jffs2_eraseblock *nextblock; /* The block we're currently filling */ | |
87 | ||
88 | struct jffs2_eraseblock *gcblock; /* The block we're currently garbage-collecting */ | |
89 | ||
90 | struct list_head clean_list; /* Blocks 100% full of clean data */ | |
91 | struct list_head very_dirty_list; /* Blocks with lots of dirty space */ | |
92 | struct list_head dirty_list; /* Blocks with some dirty space */ | |
93 | struct list_head erasable_list; /* Blocks which are completely dirty, and need erasing */ | |
94 | struct list_head erasable_pending_wbuf_list; /* Blocks which need erasing but only after the current wbuf is flushed */ | |
95 | struct list_head erasing_list; /* Blocks which are currently erasing */ | |
e2bc322b | 96 | struct list_head erase_checking_list; /* Blocks which are being checked and marked */ |
1da177e4 LT |
97 | struct list_head erase_pending_list; /* Blocks which need erasing now */ |
98 | struct list_head erase_complete_list; /* Blocks which are erased and need the clean marker written to them */ | |
99 | struct list_head free_list; /* Blocks which are free and ready to be used */ | |
100 | struct list_head bad_list; /* Bad blocks. */ | |
101 | struct list_head bad_used_list; /* Bad blocks with valid data in. */ | |
102 | ||
182ec4ee | 103 | spinlock_t erase_completion_lock; /* Protect free_list and erasing_list |
1da177e4 LT |
104 | against erase completion handler */ |
105 | wait_queue_head_t erase_wait; /* For waiting for erases to complete */ | |
106 | ||
107 | wait_queue_head_t inocache_wq; | |
65e5a0e1 | 108 | int inocache_hashsize; |
1da177e4 LT |
109 | struct jffs2_inode_cache **inocache_list; |
110 | spinlock_t inocache_lock; | |
182ec4ee | 111 | |
1da177e4 | 112 | /* Sem to allow jffs2_garbage_collect_deletion_dirent to |
182ec4ee | 113 | drop the erase_completion_lock while it's holding a pointer |
1da177e4 | 114 | to an obsoleted node. I don't like this. Alternatives welcomed. */ |
ced22070 | 115 | struct mutex erase_free_sem; |
1da177e4 | 116 | |
733802d9 | 117 | uint32_t wbuf_pagesize; /* 0 for NOR and other flashes with no wbuf */ |
182ec4ee | 118 | |
a6bc432e DW |
119 | #ifdef CONFIG_JFFS2_FS_WBUF_VERIFY |
120 | unsigned char *wbuf_verify; /* read-back buffer for verification */ | |
121 | #endif | |
2f82ce1e | 122 | #ifdef CONFIG_JFFS2_FS_WRITEBUFFER |
a7a6ace1 | 123 | unsigned char *wbuf; /* Write-behind buffer for NAND flash */ |
1da177e4 LT |
124 | uint32_t wbuf_ofs; |
125 | uint32_t wbuf_len; | |
1da177e4 | 126 | struct jffs2_inodirty *wbuf_inodes; |
1da177e4 LT |
127 | struct rw_semaphore wbuf_sem; /* Protects the write buffer */ |
128 | ||
a7a6ace1 AB |
129 | unsigned char *oobbuf; |
130 | int oobavail; /* How many bytes are available for JFFS2 in OOB */ | |
1da177e4 LT |
131 | #endif |
132 | ||
e631ddba | 133 | struct jffs2_summary *summary; /* Summary information */ |
92abc475 | 134 | struct jffs2_mount_opts mount_opts; |
e631ddba | 135 | |
aa98d7cf KK |
136 | #ifdef CONFIG_JFFS2_FS_XATTR |
137 | #define XATTRINDEX_HASHSIZE (57) | |
138 | uint32_t highest_xid; | |
c9f700f8 | 139 | uint32_t highest_xseqno; |
aa98d7cf | 140 | struct list_head xattrindex[XATTRINDEX_HASHSIZE]; |
aa98d7cf | 141 | struct list_head xattr_unchecked; |
c9f700f8 KK |
142 | struct list_head xattr_dead_list; |
143 | struct jffs2_xattr_ref *xref_dead_list; | |
8f2b6f49 | 144 | struct jffs2_xattr_ref *xref_temp; |
aa98d7cf KK |
145 | struct rw_semaphore xattr_sem; |
146 | uint32_t xdatum_mem_usage; | |
147 | uint32_t xdatum_mem_threshold; | |
148 | #endif | |
1da177e4 LT |
149 | /* OS-private pointer for getting back to master superblock info */ |
150 | void *os_priv; | |
151 | }; | |
152 | ||
027d9ac2 | 153 | #endif /* _JFFS2_FS_SB */ |