Root/fs/jffs2/os-linux.h

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
19struct kstatfs;
20struct 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) (OFNI_EDONI_2SFFJ(f)->i_uid)
31#define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)
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
50static 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) ((c)->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
99#else /* NAND and/or ECC'd NOR support present */
100
101#define jffs2_is_writebuffered(c) (c->wbuf != NULL)
102
103#ifdef CONFIG_JFFS2_SUMMARY
104#define jffs2_can_mark_obsolete(c) (0)
105#else
106#define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE))
107#endif
108
109#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
110
111#define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
112#define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
113#define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
114
115/* wbuf.c */
116int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino);
117int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
118int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
119int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
120int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
121int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
122int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
123void jffs2_wbuf_timeout(unsigned long data);
124void jffs2_wbuf_process(void *data);
125int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
126int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
127int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
128void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
129
130#define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
131int jffs2_dataflash_setup(struct jffs2_sb_info *c);
132void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
133#define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME)
134int jffs2_ubivol_setup(struct jffs2_sb_info *c);
135void jffs2_ubivol_cleanup(struct jffs2_sb_info *c);
136
137#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE))
138int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
139void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);
140
141#endif /* WRITEBUFFER */
142
143/* erase.c */
144static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
145{
146    OFNI_BS_2SFFJ(c)->s_dirt = 1;
147}
148
149/* background.c */
150int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
151void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
152void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
153
154/* dir.c */
155extern const struct file_operations jffs2_dir_operations;
156extern const struct inode_operations jffs2_dir_inode_operations;
157
158/* file.c */
159extern const struct file_operations jffs2_file_operations;
160extern const struct inode_operations jffs2_file_inode_operations;
161extern const struct address_space_operations jffs2_file_address_operations;
162int jffs2_fsync(struct file *, struct dentry *, int);
163int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
164
165/* ioctl.c */
166long jffs2_ioctl(struct file *, unsigned int, unsigned long);
167
168/* symlink.c */
169extern const struct inode_operations jffs2_symlink_inode_operations;
170
171/* fs.c */
172int jffs2_setattr (struct dentry *, struct iattr *);
173int jffs2_do_setattr (struct inode *, struct iattr *);
174struct inode *jffs2_iget(struct super_block *, unsigned long);
175void jffs2_clear_inode (struct inode *);
176void jffs2_dirty_inode(struct inode *inode);
177struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
178                   struct jffs2_raw_inode *ri);
179int jffs2_statfs (struct dentry *, struct kstatfs *);
180int jffs2_remount_fs (struct super_block *, int *, char *);
181int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
182void jffs2_gc_release_inode(struct jffs2_sb_info *c,
183                struct jffs2_inode_info *f);
184struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
185                          int inum, int unlinked);
186
187unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
188                   struct jffs2_inode_info *f,
189                   unsigned long offset,
190                   unsigned long *priv);
191void jffs2_gc_release_page(struct jffs2_sb_info *c,
192               unsigned char *pg,
193               unsigned long *priv);
194void jffs2_flash_cleanup(struct jffs2_sb_info *c);
195
196
197/* writev.c */
198int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
199               unsigned long count, loff_t to, size_t *retlen);
200int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
201            size_t *retlen, const u_char *buf);
202
203#endif /* __JFFS2_OS_LINUX_H__ */
204
205
206

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