2 * JFFS2 -- Journalling Flash File System, Version 2.
4 * Copyright (C) 2002-2003 Red Hat, Inc.
6 * Created by David Woodhouse <dwmw2@redhat.com>
8 * For licensing information, see the file 'LICENCE' in this directory.
10 * $Id: os-linux.h,v 1.37 2003/10/11 11:47:23 dwmw2 Exp $
14 #ifndef __JFFS2_OS_LINUX_H__
15 #define __JFFS2_OS_LINUX_H__
16 #include <linux/version.h>
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)
22 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,73)
23 #define kstatfs statfs
26 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
27 #define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode))
28 #define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode)
29 #define JFFS2_SB_INFO(sb) (sb->s_fs_info)
30 #define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv)
31 #elif defined(JFFS2_OUT_OF_KERNEL)
32 #define JFFS2_INODE_INFO(i) ((struct jffs2_inode_info *) &(i)->u)
33 #define OFNI_EDONI_2SFFJ(f) ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) )
34 #define JFFS2_SB_INFO(sb) ((struct jffs2_sb_info *) &(sb)->u)
35 #define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) )
37 #define JFFS2_INODE_INFO(i) (&i->u.jffs2_i)
38 #define OFNI_EDONI_2SFFJ(f) ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) )
39 #define JFFS2_SB_INFO(sb) (&sb->u.jffs2_sb)
40 #define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) )
44 #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
45 #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
46 #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid)
47 #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)
49 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,1)
50 #define JFFS2_F_I_RDEV_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f)))
51 #define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f)))
53 #define JFFS2_F_I_RDEV_MIN(f) (MINOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev)))
54 #define JFFS2_F_I_RDEV_MAJ(f) (MAJOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev)))
57 /* Urgh. The things we do to keep the 2.4 build working */
58 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,47)
59 #define ITIME(sec) ((struct timespec){sec, 0})
60 #define I_SEC(tv) ((tv).tv_sec)
61 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec)
62 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec)
63 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec)
67 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime)
68 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime)
69 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime)
72 /* Hmmm. P'raps generic code should only ever see versions of signal
73 functions which do the locking automatically? */
74 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,40) && !defined(__rh_config_h__)
75 #define current_sig_lock current->sigmask_lock
77 #define current_sig_lock current->sighand->siglock
80 #define sleep_on_spinunlock(wq, s) \
82 DECLARE_WAITQUEUE(__wait, current); \
83 add_wait_queue((wq), &__wait); \
84 set_current_state(TASK_UNINTERRUPTIBLE); \
87 remove_wait_queue((wq), &__wait); \
90 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
92 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
93 f->highest_version = 0;
94 f->fragtree = RB_ROOT;
100 memset(f, 0, sizeof(*f));
101 init_MUTEX_LOCKED(&f->sem);
105 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
107 #ifndef CONFIG_JFFS2_FS_NAND
108 #define jffs2_can_mark_obsolete(c) (1)
109 #define jffs2_cleanmarker_oob(c) (0)
110 #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
112 #define jffs2_flash_write(c, ofs, len, retlen, buf) ((c)->mtd->write((c)->mtd, ofs, len, retlen, buf))
113 #define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf))
114 #define jffs2_flush_wbuf_pad(c) ({ (void)(c), 0; })
115 #define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; })
116 #define jffs2_nand_read_failcnt(c,jeb) do { ; } while(0)
117 #define jffs2_write_nand_badblock(c,jeb) do { ; } while(0)
118 #define jffs2_nand_flash_setup(c) (0)
119 #define jffs2_nand_flash_cleanup(c) do {} while(0)
120 #define jffs2_wbuf_dirty(c) (0)
121 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
122 #define jffs2_wbuf_timeout NULL
123 #define jffs2_wbuf_process NULL
125 #else /* NAND support present */
127 #define jffs2_can_mark_obsolete(c) (c->mtd->type == MTD_NORFLASH || c->mtd->type == MTD_RAM)
128 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
130 #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
131 #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
132 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
137 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);
138 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
139 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
140 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
141 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
142 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
143 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
144 void jffs2_wbuf_timeout(unsigned long data);
145 void jffs2_wbuf_process(void *data);
146 int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
147 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
151 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
152 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
153 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
156 extern struct file_operations jffs2_dir_operations;
157 extern struct inode_operations jffs2_dir_inode_operations;
160 extern struct file_operations jffs2_file_operations;
161 extern struct inode_operations jffs2_file_inode_operations;
162 extern struct address_space_operations jffs2_file_address_operations;
163 int jffs2_fsync(struct file *, struct dentry *, int);
164 int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg);
165 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
166 int jffs2_readpage (struct file *, struct page *);
167 int jffs2_prepare_write (struct file *, struct page *, unsigned, unsigned);
168 int jffs2_commit_write (struct file *, struct page *, unsigned, unsigned);
171 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
174 extern struct inode_operations jffs2_symlink_inode_operations;
177 int jffs2_setattr (struct dentry *, struct iattr *);
178 void jffs2_read_inode (struct inode *);
179 void jffs2_clear_inode (struct inode *);
180 void jffs2_dirty_inode(struct inode *inode);
181 struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
182 struct jffs2_raw_inode *ri);
183 int jffs2_statfs (struct super_block *, struct kstatfs *);
184 void jffs2_write_super (struct super_block *);
185 int jffs2_remount_fs (struct super_block *, int *, char *);
186 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
189 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
190 unsigned long count, loff_t to, size_t *retlen);
195 #endif /* __JFFS2_OS_LINUX_H__ */