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1/*
2 * JFFS2 -- Journalling Flash File System, Version 2.
3 *
4 * Copyright © 2001-2007 Red Hat, Inc.
5 *
6 * Created by David Woodhouse <[email protected]>
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) (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
51static 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 */
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);
140void jffs2_dirty_trigger(struct jffs2_sb_info *c);
141
142#endif /* WRITEBUFFER */
143
144/* background.c */
145int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
146void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
147void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
148
149/* dir.c */
150extern const struct file_operations jffs2_dir_operations;
151extern const struct inode_operations jffs2_dir_inode_operations;
152
153/* file.c */
154extern const struct file_operations jffs2_file_operations;
155extern const struct inode_operations jffs2_file_inode_operations;
156extern const struct address_space_operations jffs2_file_address_operations;
157int jffs2_fsync(struct file *, loff_t, loff_t, int);
158int __jffs2_read_folio(struct file *file, struct folio *folio);
159
160/* ioctl.c */
161long jffs2_ioctl(struct file *, unsigned int, unsigned long);
162
163/* symlink.c */
164extern const struct inode_operations jffs2_symlink_inode_operations;
165
166/* fs.c */
167int jffs2_setattr (const struct mnt_idmap *, struct dentry *, struct iattr *);
168int jffs2_do_setattr (struct inode *, struct iattr *);
169struct inode *jffs2_iget(struct super_block *, unsigned long);
170void jffs2_evict_inode (struct inode *);
171void jffs2_dirty_inode(struct inode *inode, int flags);
172struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode,
173 struct jffs2_raw_inode *ri);
174int jffs2_statfs (struct dentry *, struct kstatfs *);
175int jffs2_do_remount_fs(struct super_block *sb, struct fs_context *fc);
176int jffs2_do_fill_super(struct super_block *sb, struct fs_context *fc);
177void jffs2_gc_release_inode(struct jffs2_sb_info *c,
178 struct jffs2_inode_info *f);
179struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
180 int inum, int unlinked);
181
182unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
183 struct jffs2_inode_info *f,
184 unsigned long offset,
185 unsigned long *priv);
186void jffs2_flash_cleanup(struct jffs2_sb_info *c);
187
188
189/* writev.c */
190int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
191 unsigned long count, loff_t to, size_t *retlen);
192int 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