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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 <dwmw2@infradead.org>
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 : 0 : f->highest_version = 0;
53 : 0 : f->fragtree = RB_ROOT;
54 : 0 : f->metadata = NULL;
55 : 0 : f->dents = NULL;
56 : 0 : f->target = NULL;
57 : 0 : f->flags = 0;
58 : 0 : 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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