tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * JFFS2 -- Journalling Flash File System, Version 2.
3 *
4 * Copyright (C) 2002-2003 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 * $Id: os-linux.h,v 1.64 2005/09/30 13:59:13 dedekind Exp $
11 *
12 */
13
14#ifndef __JFFS2_OS_LINUX_H__
15#define __JFFS2_OS_LINUX_H__
16
17/* JFFS2 uses Linux mode bits natively -- no need for conversion */
18#define os_to_jffs2_mode(x) (x)
19#define jffs2_to_os_mode(x) (x)
20
21struct kstatfs;
22struct kvec;
23
24#define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode))
25#define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode)
26#define JFFS2_SB_INFO(sb) (sb->s_fs_info)
27#define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv)
28
29
30#define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
31#define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
32#define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid)
33#define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)
34
35#define JFFS2_F_I_RDEV_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f)))
36#define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f)))
37
38#define ITIME(sec) ((struct timespec){sec, 0})
39#define I_SEC(tv) ((tv).tv_sec)
40#define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec)
41#define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec)
42#define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec)
43
44#define sleep_on_spinunlock(wq, s) \
45 do { \
46 DECLARE_WAITQUEUE(__wait, current); \
47 add_wait_queue((wq), &__wait); \
48 set_current_state(TASK_UNINTERRUPTIBLE); \
49 spin_unlock(s); \
50 schedule(); \
51 remove_wait_queue((wq), &__wait); \
52 } while(0)
53
54static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
55{
56 f->highest_version = 0;
57 f->fragtree = RB_ROOT;
58 f->metadata = NULL;
59 f->dents = NULL;
60 f->target = NULL;
61 f->flags = 0;
62 f->usercompr = 0;
63}
64
65
66#define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
67
68#define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) )
69#ifndef CONFIG_JFFS2_FS_WRITEBUFFER
70
71
72#ifdef CONFIG_JFFS2_SUMMARY
73#define jffs2_can_mark_obsolete(c) (0)
74#else
75#define jffs2_can_mark_obsolete(c) (1)
76#endif
77
78#define jffs2_is_writebuffered(c) (0)
79#define jffs2_cleanmarker_oob(c) (0)
80#define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
81
82#define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf)
83#define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf))
84#define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; })
85#define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; })
86#define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
87#define jffs2_nand_flash_setup(c) (0)
88#define jffs2_nand_flash_cleanup(c) do {} while(0)
89#define jffs2_wbuf_dirty(c) (0)
90#define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
91#define jffs2_wbuf_timeout NULL
92#define jffs2_wbuf_process NULL
93#define jffs2_nor_ecc(c) (0)
94#define jffs2_dataflash(c) (0)
95#define jffs2_nor_wbuf_flash(c) (0)
96#define jffs2_nor_ecc_flash_setup(c) (0)
97#define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)
98#define jffs2_dataflash_setup(c) (0)
99#define jffs2_dataflash_cleanup(c) do {} while (0)
100#define jffs2_nor_wbuf_flash_setup(c) (0)
101#define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0)
102
103#else /* NAND and/or ECC'd NOR support present */
104
105#define jffs2_is_writebuffered(c) (c->wbuf != NULL)
106
107#ifdef CONFIG_JFFS2_SUMMARY
108#define jffs2_can_mark_obsolete(c) (0)
109#else
110#define jffs2_can_mark_obsolete(c) \
111 ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & (MTD_ECC|MTD_PROGRAM_REGIONS))) || \
112 c->mtd->type == MTD_RAM)
113#endif
114
115#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
116
117#define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
118#define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
119#define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
120
121/* wbuf.c */
122int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino);
123int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
124int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
125int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
126int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
127int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
128int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
129void jffs2_wbuf_timeout(unsigned long data);
130void jffs2_wbuf_process(void *data);
131int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
132int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
133int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
134void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
135
136#define jffs2_nor_ecc(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_ECC))
137int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c);
138void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c);
139
140#define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
141int jffs2_dataflash_setup(struct jffs2_sb_info *c);
142void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
143
144#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_PROGRAM_REGIONS))
145int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
146void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);
147
148#endif /* WRITEBUFFER */
149
150/* erase.c */
151static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
152{
153 OFNI_BS_2SFFJ(c)->s_dirt = 1;
154}
155
156/* background.c */
157int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
158void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
159void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
160
161/* dir.c */
162extern struct file_operations jffs2_dir_operations;
163extern struct inode_operations jffs2_dir_inode_operations;
164
165/* file.c */
166extern struct file_operations jffs2_file_operations;
167extern struct inode_operations jffs2_file_inode_operations;
168extern struct address_space_operations jffs2_file_address_operations;
169int jffs2_fsync(struct file *, struct dentry *, int);
170int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
171
172/* ioctl.c */
173int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
174
175/* symlink.c */
176extern struct inode_operations jffs2_symlink_inode_operations;
177
178/* fs.c */
179int jffs2_setattr (struct dentry *, struct iattr *);
180void jffs2_read_inode (struct inode *);
181void jffs2_clear_inode (struct inode *);
182void jffs2_dirty_inode(struct inode *inode);
183struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
184 struct jffs2_raw_inode *ri);
185int jffs2_statfs (struct super_block *, struct kstatfs *);
186void jffs2_write_super (struct super_block *);
187int jffs2_remount_fs (struct super_block *, int *, char *);
188int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
189void jffs2_gc_release_inode(struct jffs2_sb_info *c,
190 struct jffs2_inode_info *f);
191struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
192 int inum, int nlink);
193
194unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
195 struct jffs2_inode_info *f,
196 unsigned long offset,
197 unsigned long *priv);
198void jffs2_gc_release_page(struct jffs2_sb_info *c,
199 unsigned char *pg,
200 unsigned long *priv);
201void jffs2_flash_cleanup(struct jffs2_sb_info *c);
202
203
204/* writev.c */
205int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
206 unsigned long count, loff_t to, size_t *retlen);
207int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
208 size_t *retlen, const u_char *buf);
209
210#endif /* __JFFS2_OS_LINUX_H__ */
211
212