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) (container_of(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 JFFS2_CLAMP_TIME(t) ((uint32_t)clamp_t(time64_t, (t), 0, U32_MAX)) |
35 | #define ITIME(sec) ((struct timespec64){sec, 0}) |
36 | #define JFFS2_NOW() JFFS2_CLAMP_TIME(ktime_get_real_seconds()) |
37 | #define I_SEC(tv) JFFS2_CLAMP_TIME((tv).tv_sec) |
38 | #define JFFS2_F_I_CTIME(f) I_SEC(inode_get_ctime(OFNI_EDONI_2SFFJ(f))) |
39 | #define JFFS2_F_I_MTIME(f) I_SEC(inode_get_mtime(OFNI_EDONI_2SFFJ(f))) |
40 | #define JFFS2_F_I_ATIME(f) I_SEC(inode_get_atime(OFNI_EDONI_2SFFJ(f))) |
41 | #define sleep_on_spinunlock(wq, s) \ |
42 | do { \ |
43 | DECLARE_WAITQUEUE(__wait, current); \ |
44 | add_wait_queue((wq), &__wait); \ |
45 | set_current_state(TASK_UNINTERRUPTIBLE); \ |
46 | spin_unlock(s); \ |
47 | schedule(); \ |
48 | remove_wait_queue((wq), &__wait); \ |
49 | } while(0) |
50 | |
51 | static inline void jffs2_init_inode_info(struct jffs2_inode_info *f) |
52 | { |
53 | f->highest_version = 0; |
54 | f->fragtree = RB_ROOT; |
55 | f->metadata = NULL; |
56 | f->dents = NULL; |
57 | f->target = NULL; |
58 | f->flags = 0; |
59 | f->usercompr = 0; |
60 | } |
61 | |
62 | |
63 | #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & SB_RDONLY) |
64 | |
65 | #define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) ) |
66 | #ifndef CONFIG_JFFS2_FS_WRITEBUFFER |
67 | |
68 | |
69 | #ifdef CONFIG_JFFS2_SUMMARY |
70 | #define jffs2_can_mark_obsolete(c) (0) |
71 | #else |
72 | #define jffs2_can_mark_obsolete(c) (1) |
73 | #endif |
74 | |
75 | #define jffs2_is_writebuffered(c) (0) |
76 | #define jffs2_cleanmarker_oob(c) (0) |
77 | #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) |
78 | |
79 | #define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf) |
80 | #define jffs2_flash_read(c, ofs, len, retlen, buf) (mtd_read((c)->mtd, ofs, len, retlen, buf)) |
81 | #define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; }) |
82 | #define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; }) |
83 | #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1) |
84 | #define jffs2_nand_flash_setup(c) (0) |
85 | #define jffs2_nand_flash_cleanup(c) do {} while(0) |
86 | #define jffs2_wbuf_dirty(c) (0) |
87 | #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) |
88 | #define jffs2_wbuf_timeout NULL |
89 | #define jffs2_wbuf_process NULL |
90 | #define jffs2_dataflash(c) (0) |
91 | #define jffs2_dataflash_setup(c) (0) |
92 | #define jffs2_dataflash_cleanup(c) do {} while (0) |
93 | #define jffs2_nor_wbuf_flash(c) (0) |
94 | #define jffs2_nor_wbuf_flash_setup(c) (0) |
95 | #define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0) |
96 | #define jffs2_ubivol(c) (0) |
97 | #define jffs2_ubivol_setup(c) (0) |
98 | #define jffs2_ubivol_cleanup(c) do {} while (0) |
99 | #define jffs2_dirty_trigger(c) do {} while (0) |
100 | |
101 | #else /* NAND and/or ECC'd NOR support present */ |
102 | |
103 | #define jffs2_is_writebuffered(c) (c->wbuf != NULL) |
104 | |
105 | #ifdef CONFIG_JFFS2_SUMMARY |
106 | #define jffs2_can_mark_obsolete(c) (0) |
107 | #else |
108 | #define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE)) |
109 | #endif |
110 | |
111 | #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) |
112 | |
113 | #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) |
114 | |
115 | /* wbuf.c */ |
116 | 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); |
117 | int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); |
118 | int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); |
119 | int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); |
120 | int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
121 | int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
122 | int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); |
123 | void jffs2_wbuf_timeout(unsigned long data); |
124 | void jffs2_wbuf_process(void *data); |
125 | int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); |
126 | int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); |
127 | int jffs2_nand_flash_setup(struct jffs2_sb_info *c); |
128 | void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); |
129 | |
130 | #define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH) |
131 | int jffs2_dataflash_setup(struct jffs2_sb_info *c); |
132 | void jffs2_dataflash_cleanup(struct jffs2_sb_info *c); |
133 | #define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME) |
134 | int jffs2_ubivol_setup(struct jffs2_sb_info *c); |
135 | void 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)) |
138 | int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c); |
139 | void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c); |
140 | void jffs2_dirty_trigger(struct jffs2_sb_info *c); |
141 | |
142 | #endif /* WRITEBUFFER */ |
143 | |
144 | /* background.c */ |
145 | int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); |
146 | void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); |
147 | void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); |
148 | |
149 | /* dir.c */ |
150 | extern const struct file_operations jffs2_dir_operations; |
151 | extern const struct inode_operations jffs2_dir_inode_operations; |
152 | |
153 | /* file.c */ |
154 | extern const struct file_operations jffs2_file_operations; |
155 | extern const struct inode_operations jffs2_file_inode_operations; |
156 | extern const struct address_space_operations jffs2_file_address_operations; |
157 | int jffs2_fsync(struct file *, loff_t, loff_t, int); |
158 | int __jffs2_read_folio(struct file *file, struct folio *folio); |
159 | |
160 | /* ioctl.c */ |
161 | long jffs2_ioctl(struct file *, unsigned int, unsigned long); |
162 | |
163 | /* symlink.c */ |
164 | extern const struct inode_operations jffs2_symlink_inode_operations; |
165 | |
166 | /* fs.c */ |
167 | int jffs2_setattr (struct mnt_idmap *, struct dentry *, struct iattr *); |
168 | int jffs2_do_setattr (struct inode *, struct iattr *); |
169 | struct inode *jffs2_iget(struct super_block *, unsigned long); |
170 | void jffs2_evict_inode (struct inode *); |
171 | void jffs2_dirty_inode(struct inode *inode, int flags); |
172 | struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode, |
173 | struct jffs2_raw_inode *ri); |
174 | int jffs2_statfs (struct dentry *, struct kstatfs *); |
175 | int jffs2_do_remount_fs(struct super_block *sb, struct fs_context *fc); |
176 | int jffs2_do_fill_super(struct super_block *sb, struct fs_context *fc); |
177 | void jffs2_gc_release_inode(struct jffs2_sb_info *c, |
178 | struct jffs2_inode_info *f); |
179 | struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, |
180 | int inum, int unlinked); |
181 | |
182 | unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, |
183 | struct jffs2_inode_info *f, |
184 | unsigned long offset, |
185 | unsigned long *priv); |
186 | void jffs2_flash_cleanup(struct jffs2_sb_info *c); |
187 | |
188 | |
189 | /* writev.c */ |
190 | int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, |
191 | unsigned long count, loff_t to, size_t *retlen); |
192 | int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, |
193 | size_t *retlen, const u_char *buf); |
194 | |
195 | #endif /* __JFFS2_OS_LINUX_H__ */ |
196 | |
197 | |
198 | |