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os-linux.h
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1 /*
2  * JFFS2 -- Journalling Flash File System, Version 2.
3  *
4  * Copyright © 2001-2007 Red Hat, Inc.
5  *
6  * Created by David Woodhouse <[email protected]>
7  *
8  * For licensing information, see the file 'LICENCE' in this directory.
9  *
10  */
11 
12 #ifndef __JFFS2_OS_LINUX_H__
13 #define __JFFS2_OS_LINUX_H__
14 
15 /* JFFS2 uses Linux mode bits natively -- no need for conversion */
16 #define os_to_jffs2_mode(x) (x)
17 #define jffs2_to_os_mode(x) (x)
18 
19 struct kstatfs;
20 struct kvec;
21 
22 #define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode))
23 #define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode)
24 #define JFFS2_SB_INFO(sb) (sb->s_fs_info)
25 #define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv)
26 
27 
28 #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
29 #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
30 #define JFFS2_F_I_UID(f) (i_uid_read(OFNI_EDONI_2SFFJ(f)))
31 #define JFFS2_F_I_GID(f) (i_gid_read(OFNI_EDONI_2SFFJ(f)))
32 #define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev)
33 
34 #define ITIME(sec) ((struct timespec){sec, 0})
35 #define I_SEC(tv) ((tv).tv_sec)
36 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec)
37 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec)
38 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec)
39 
40 #define sleep_on_spinunlock(wq, s) \
41  do { \
42  DECLARE_WAITQUEUE(__wait, current); \
43  add_wait_queue((wq), &__wait); \
44  set_current_state(TASK_UNINTERRUPTIBLE); \
45  spin_unlock(s); \
46  schedule(); \
47  remove_wait_queue((wq), &__wait); \
48  } while(0)
49 
50 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
51 {
52  f->highest_version = 0;
53  f->fragtree = RB_ROOT;
54  f->metadata = NULL;
55  f->dents = NULL;
56  f->target = NULL;
57  f->flags = 0;
58  f->usercompr = 0;
59 }
60 
61 
62 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
63 
64 #define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) )
65 #ifndef CONFIG_JFFS2_FS_WRITEBUFFER
66 
67 
68 #ifdef CONFIG_JFFS2_SUMMARY
69 #define jffs2_can_mark_obsolete(c) (0)
70 #else
71 #define jffs2_can_mark_obsolete(c) (1)
72 #endif
73 
74 #define jffs2_is_writebuffered(c) (0)
75 #define jffs2_cleanmarker_oob(c) (0)
76 #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
77 
78 #define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf)
79 #define jffs2_flash_read(c, ofs, len, retlen, buf) (mtd_read((c)->mtd, ofs, len, retlen, buf))
80 #define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; })
81 #define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; })
82 #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
83 #define jffs2_nand_flash_setup(c) (0)
84 #define jffs2_nand_flash_cleanup(c) do {} while(0)
85 #define jffs2_wbuf_dirty(c) (0)
86 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
87 #define jffs2_wbuf_timeout NULL
88 #define jffs2_wbuf_process NULL
89 #define jffs2_dataflash(c) (0)
90 #define jffs2_dataflash_setup(c) (0)
91 #define jffs2_dataflash_cleanup(c) do {} while (0)
92 #define jffs2_nor_wbuf_flash(c) (0)
93 #define jffs2_nor_wbuf_flash_setup(c) (0)
94 #define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0)
95 #define jffs2_ubivol(c) (0)
96 #define jffs2_ubivol_setup(c) (0)
97 #define jffs2_ubivol_cleanup(c) do {} while (0)
98 #define jffs2_dirty_trigger(c) do {} while (0)
99 
100 #else /* NAND and/or ECC'd NOR support present */
101 
102 #define jffs2_is_writebuffered(c) (c->wbuf != NULL)
103 
104 #ifdef CONFIG_JFFS2_SUMMARY
105 #define jffs2_can_mark_obsolete(c) (0)
106 #else
107 #define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE))
108 #endif
109 
110 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
111 
112 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
113 
114 /* wbuf.c */
115 int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino);
116 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
117 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
118 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
119 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
120 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
121 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
122 void jffs2_wbuf_timeout(unsigned long data);
123 void jffs2_wbuf_process(void *data);
124 int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
125 int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
126 int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
127 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
128 
129 #define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
130 int jffs2_dataflash_setup(struct jffs2_sb_info *c);
131 void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
132 #define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME)
133 int jffs2_ubivol_setup(struct jffs2_sb_info *c);
134 void jffs2_ubivol_cleanup(struct jffs2_sb_info *c);
135 
136 #define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE))
137 int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
138 void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);
139 void jffs2_dirty_trigger(struct jffs2_sb_info *c);
140 
141 #endif /* WRITEBUFFER */
142 
143 /* background.c */
144 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
145 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
146 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
147 
148 /* dir.c */
149 extern const struct file_operations jffs2_dir_operations;
150 extern const struct inode_operations jffs2_dir_inode_operations;
151 
152 /* file.c */
153 extern const struct file_operations jffs2_file_operations;
154 extern const struct inode_operations jffs2_file_inode_operations;
155 extern const struct address_space_operations jffs2_file_address_operations;
156 int jffs2_fsync(struct file *, loff_t, loff_t, int);
157 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
158 
159 /* ioctl.c */
160 long jffs2_ioctl(struct file *, unsigned int, unsigned long);
161 
162 /* symlink.c */
163 extern const struct inode_operations jffs2_symlink_inode_operations;
164 
165 /* fs.c */
166 int jffs2_setattr (struct dentry *, struct iattr *);
167 int jffs2_do_setattr (struct inode *, struct iattr *);
168 struct inode *jffs2_iget(struct super_block *, unsigned long);
169 void jffs2_evict_inode (struct inode *);
170 void jffs2_dirty_inode(struct inode *inode, int flags);
171 struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode,
172  struct jffs2_raw_inode *ri);
173 int jffs2_statfs (struct dentry *, struct kstatfs *);
174 int jffs2_do_remount_fs(struct super_block *, int *, char *);
175 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
176 void jffs2_gc_release_inode(struct jffs2_sb_info *c,
177  struct jffs2_inode_info *f);
178 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
179  int inum, int unlinked);
180 
181 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
182  struct jffs2_inode_info *f,
183  unsigned long offset,
184  unsigned long *priv);
185 void jffs2_gc_release_page(struct jffs2_sb_info *c,
186  unsigned char *pg,
187  unsigned long *priv);
188 void jffs2_flash_cleanup(struct jffs2_sb_info *c);
189 
190 
191 /* writev.c */
192 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
193  unsigned long count, loff_t to, size_t *retlen);
194 int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
195  size_t *retlen, const u_char *buf);
196 
197 #endif /* __JFFS2_OS_LINUX_H__ */
198 
199 
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