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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_unlock (struct inode *inode, struct page *pg); | |
177 | ||
178 | /* ioctl.c */ | |
179 | int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long); | |
180 | ||
181 | /* symlink.c */ | |
182 | extern struct inode_operations jffs2_symlink_inode_operations; | |
183 | ||
184 | /* fs.c */ | |
185 | int jffs2_setattr (struct dentry *, struct iattr *); | |
186 | void jffs2_read_inode (struct inode *); | |
187 | void jffs2_clear_inode (struct inode *); | |
188 | void jffs2_dirty_inode(struct inode *inode); | |
189 | struct inode *jffs2_new_inode (struct inode *dir_i, int mode, | |
190 | struct jffs2_raw_inode *ri); | |
191 | int jffs2_statfs (struct super_block *, struct kstatfs *); | |
192 | void jffs2_write_super (struct super_block *); | |
193 | int jffs2_remount_fs (struct super_block *, int *, char *); | |
194 | int jffs2_do_fill_super(struct super_block *sb, void *data, int silent); | |
195 | void jffs2_gc_release_inode(struct jffs2_sb_info *c, | |
196 | struct jffs2_inode_info *f); | |
197 | struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, | |
198 | int inum, int nlink); | |
199 | ||
200 | unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, | |
201 | struct jffs2_inode_info *f, | |
202 | unsigned long offset, | |
203 | unsigned long *priv); | |
204 | void jffs2_gc_release_page(struct jffs2_sb_info *c, | |
205 | unsigned char *pg, | |
206 | unsigned long *priv); | |
207 | void jffs2_flash_cleanup(struct jffs2_sb_info *c); | |
208 | ||
209 | ||
210 | /* writev.c */ | |
211 | int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, | |
212 | unsigned long count, loff_t to, size_t *retlen); | |
213 | ||
214 | ||
215 | #endif /* __JFFS2_OS_LINUX_H__ */ | |
216 | ||
217 |