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 1.51 2004/11/16 20:36:11 dwmw2 Exp $
11 *
12 */
13
14 #ifndef __JFFS2_OS_LINUX_H__
15 #define __JFFS2_OS_LINUX_H__
16 #include <linux/version.h>
17
18 /* JFFS2 uses Linux mode bits natively -- no need for conversion */
19 #define os_to_jffs2_mode(x) (x)
20 #define jffs2_to_os_mode(x) (x)
21
22 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,73)
23 #define kstatfs statfs
24 #endif
25
26 struct kstatfs;
27 struct kvec;
28
29 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
30 #define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode))
31 #define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode)
32 #define JFFS2_SB_INFO(sb) (sb->s_fs_info)
33 #define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv)
34 #elif defined(JFFS2_OUT_OF_KERNEL)
35 #define JFFS2_INODE_INFO(i) ((struct jffs2_inode_info *) &(i)->u)
36 #define OFNI_EDONI_2SFFJ(f) ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) )
37 #define JFFS2_SB_INFO(sb) ((struct jffs2_sb_info *) &(sb)->u)
38 #define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) )
39 #else
40 #define JFFS2_INODE_INFO(i) (&i->u.jffs2_i)
41 #define OFNI_EDONI_2SFFJ(f) ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) )
42 #define JFFS2_SB_INFO(sb) (&sb->u.jffs2_sb)
43 #define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) )
44 #endif
45
46
47 #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
48 #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
49 #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid)
50 #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)
51
52 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,1)
53 #define JFFS2_F_I_RDEV_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f)))
54 #define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f)))
55 #else
56 #define JFFS2_F_I_RDEV_MIN(f) (MINOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev)))
57 #define JFFS2_F_I_RDEV_MAJ(f) (MAJOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev)))
58 #endif
59
60 /* Urgh. The things we do to keep the 2.4 build working */
61 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,47)
62 #define ITIME(sec) ((struct timespec){sec, 0})
63 #define I_SEC(tv) ((tv).tv_sec)
64 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec)
65 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec)
66 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec)
67 #else
68 #define ITIME(x) (x)
69 #define I_SEC(x) (x)
70 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime)
71 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime)
72 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime)
73 #endif
74
75 #define sleep_on_spinunlock(wq, s) \
76 do { \
77 DECLARE_WAITQUEUE(__wait, current); \
78 add_wait_queue((wq), &__wait); \
79 set_current_state(TASK_UNINTERRUPTIBLE); \
80 spin_unlock(s); \
81 schedule(); \
82 remove_wait_queue((wq), &__wait); \
83 } while(0)
84
85 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
86 {
87 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
88 f->highest_version = 0;
89 f->fragtree = RB_ROOT;
90 f->metadata = NULL;
91 f->dents = NULL;
92 f->flags = 0;
93 f->usercompr = 0;
94 #else
95 memset(f, 0, sizeof(*f));
96 init_MUTEX_LOCKED(&f->sem);
97 #endif
98 }
99
100 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
101
102 #if (!defined CONFIG_JFFS2_FS_NAND && !defined CONFIG_JFFS2_FS_NOR_ECC)
103 #define jffs2_can_mark_obsolete(c) (1)
104 #define jffs2_cleanmarker_oob(c) (0)
105 #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
106
107 #define jffs2_flash_write(c, ofs, len, retlen, buf) ((c)->mtd->write((c)->mtd, ofs, len, retlen, buf))
108 #define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf))
109 #define jffs2_flush_wbuf_pad(c) ({ (void)(c), 0; })
110 #define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; })
111 #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
112 #define jffs2_nand_flash_setup(c) (0)
113 #define jffs2_nand_flash_cleanup(c) do {} while(0)
114 #define jffs2_wbuf_dirty(c) (0)
115 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
116 #define jffs2_wbuf_timeout NULL
117 #define jffs2_wbuf_process NULL
118 #define jffs2_nor_ecc(c) (0)
119 #define jffs2_nor_ecc_flash_setup(c) (0)
120 #define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)
121
122 #else /* NAND and/or ECC'd NOR support present */
123
124 #define jffs2_can_mark_obsolete(c) ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & MTD_ECC)) || c->mtd->type == MTD_RAM)
125 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
126
127 #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
128 #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
129 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
130
131 /* wbuf.c */
132 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);
133 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
134 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
135 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
136 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
137 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
138 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
139 void jffs2_wbuf_timeout(unsigned long data);
140 void jffs2_wbuf_process(void *data);
141 int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
142 int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
143 int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
144 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
145 #ifdef CONFIG_JFFS2_FS_NOR_ECC
146 #define jffs2_nor_ecc(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_ECC))
147 int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c);
148 void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c);
149 #else
150 #define jffs2_nor_ecc(c) (0)
151 #define jffs2_nor_ecc_flash_setup(c) (0)
152 #define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)
153 #endif /* NOR ECC */
154 #endif /* NAND */
155
156 /* erase.c */
157 static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
158 {
159 OFNI_BS_2SFFJ(c)->s_dirt = 1;
160 }
161
162 /* background.c */
163 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
164 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
165 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
166
167 /* dir.c */
168 extern struct file_operations jffs2_dir_operations;
169 extern struct inode_operations jffs2_dir_inode_operations;
170
171 /* file.c */
172 extern struct file_operations jffs2_file_operations;
173 extern struct inode_operations jffs2_file_inode_operations;
174 extern struct address_space_operations jffs2_file_address_operations;
175 int jffs2_fsync(struct file *, struct dentry *, int);
176 int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg);
177 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
178 int jffs2_readpage (struct file *, struct page *);
179 int jffs2_prepare_write (struct file *, struct page *, unsigned, unsigned);
180 int jffs2_commit_write (struct file *, struct page *, unsigned, unsigned);
181
182 /* ioctl.c */
183 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
184
185 /* symlink.c */
186 extern struct inode_operations jffs2_symlink_inode_operations;
187
188 /* fs.c */
189 int jffs2_setattr (struct dentry *, struct iattr *);
190 void jffs2_read_inode (struct inode *);
191 void jffs2_clear_inode (struct inode *);
192 void jffs2_dirty_inode(struct inode *inode);
193 struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
194 struct jffs2_raw_inode *ri);
195 int jffs2_statfs (struct super_block *, struct kstatfs *);
196 void jffs2_write_super (struct super_block *);
197 int jffs2_remount_fs (struct super_block *, int *, char *);
198 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
199 void jffs2_gc_release_inode(struct jffs2_sb_info *c,
200 struct jffs2_inode_info *f);
201 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
202 int inum, int nlink);
203
204 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
205 struct jffs2_inode_info *f,
206 unsigned long offset,
207 unsigned long *priv);
208 void jffs2_gc_release_page(struct jffs2_sb_info *c,
209 unsigned char *pg,
210 unsigned long *priv);
211 int jffs2_flash_setup(struct jffs2_sb_info *c);
212 void jffs2_flash_cleanup(struct jffs2_sb_info *c);
213
214
215 /* writev.c */
216 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
217 unsigned long count, loff_t to, size_t *retlen);
218
219
220 #endif /* __JFFS2_OS_LINUX_H__ */
221
222
223
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