fs/jffs2/os-linux.h

   1 /*
   2  * JFFS2 -- Journalling Flash File System, Version 2.
   3  *
   4  * Copyright (C) 2002 Red Hat, Inc.
   5  *
   6  * Created by David Woodhouse <dwmw2@cambridge.redhat.com>
   7  *
   8  * For licensing information, see the file 'LICENCE' in this directory.
   9  *
  10  * $Id: os-linux.h,v 1.19 2002/05/20 14:56:38 dwmw2 Exp $
  11  *
  12  */
  13
  14 #ifndef __JFFS2_OS_LINUX_H__
  15 #define __JFFS2_OS_LINUX_H__
  16 #include <linux/version.h>
  17
  18 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
  19 #define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode))
  20 #define OFNI_EDONI_2SFFJ(f)  (&(f)->vfs_inode)
  21 #define JFFS2_SB_INFO(sb) (sb->s_fs_info)
  22 #define OFNI_BS_2SFFJ(c)  ((struct super_block *)c->os_priv)
  23 #elif defined(JFFS2_OUT_OF_KERNEL)
  24 #define JFFS2_INODE_INFO(i) ((struct jffs2_inode_info *) &(i)->u)
  25 #define OFNI_EDONI_2SFFJ(f)  ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) )
  26 #define JFFS2_SB_INFO(sb) ((struct jffs2_sb_info *) &(sb)->u)
  27 #define OFNI_BS_2SFFJ(c)  ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) )
  28 #else
  29 #define JFFS2_INODE_INFO(i) (&i->u.jffs2_i)
  30 #define OFNI_EDONI_2SFFJ(f)  ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) )
  31 #define JFFS2_SB_INFO(sb) (&sb->u.jffs2_sb)
  32 #define OFNI_BS_2SFFJ(c)  ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) )
  33 #endif
  34
  35
  36 #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
  37 #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
  38 #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid)
  39 #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)
  40 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec)
  41 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec)
  42 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec)
  43
  44 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,1)
  45 #define JFFS2_F_I_RDEV_MIN(f) (minor(OFNI_EDONI_2SFFJ(f)->i_rdev))
  46 #define JFFS2_F_I_RDEV_MAJ(f) (major(OFNI_EDONI_2SFFJ(f)->i_rdev))
  47 #else
  48 #define JFFS2_F_I_RDEV_MIN(f) (MINOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev)))
  49 #define JFFS2_F_I_RDEV_MAJ(f) (MAJOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev)))
  50 #endif
  51
  52 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
  53 {
  54 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
  55         f->highest_version = 0;
  56         f->fraglist = NULL;
  57         f->metadata = NULL;
  58         f->dents = NULL;
  59         f->flags = 0;
  60         f->usercompr = 0;
  61 #else
  62         memset(f, 0, sizeof(*f));
  63         init_MUTEX_LOCKED(&f->sem);
  64 #endif
  65 }
  66
  67 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
  68
  69 #ifndef CONFIG_JFFS2_FS_NAND
  70 #define jffs2_can_mark_obsolete(c) (1)
  71 #define jffs2_cleanmarker_oob(c) (0)
  72 #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
  73
  74 #define jffs2_flash_write(c, ofs, len, retlen, buf) ((c)->mtd->write((c)->mtd, ofs, len, retlen, buf))
  75 #define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf))
  76 #define jffs2_flush_wbuf(c, flag) do { ; } while(0)
  77 #define jffs2_nand_read_failcnt(c,jeb) do { ; } while(0)
  78 #define jffs2_write_nand_badblock(c,jeb) do { ; } while(0)
  79 #define jffs2_flash_writev jffs2_flash_direct_writev
  80 #define jffs2_wbuf_timeout NULL
  81 #define jffs2_wbuf_process NULL
  82
  83 #else /* NAND support present */
  84
  85 #define jffs2_can_mark_obsolete(c) (c->mtd->type == MTD_NORFLASH || c->mtd->type == MTD_RAM)
  86 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
  87
  88 #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
  89 #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
  90
  91
  92 /* wbuf.c */
  93 int jffs2_flash_writev(struct jffs2_sb_info *c, const struct iovec *vecs, unsigned long count, loff_t to, size_t *retlen);
  94 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
  95 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
  96 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
  97 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
  98 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
  99 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 100 void jffs2_wbuf_timeout(unsigned long data);
 101 void jffs2_wbuf_process(void *data);
 102 #endif /* NAND */
 103
 104 /* background.c */
 105 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
 106 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
 107 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
 108
 109 /* dir.c */
 110 extern struct file_operations jffs2_dir_operations;
 111 extern struct inode_operations jffs2_dir_inode_operations;
 112
 113 /* file.c */
 114 extern struct file_operations jffs2_file_operations;
 115 extern struct inode_operations jffs2_file_inode_operations;
 116 extern struct address_space_operations jffs2_file_address_operations;
 117 int jffs2_fsync(struct file *, struct dentry *, int);
 118 int jffs2_setattr (struct dentry *dentry, struct iattr *iattr);
 119 int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg);
 120 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
 121 int jffs2_readpage (struct file *, struct page *);
 122 int jffs2_prepare_write (struct file *, struct page *, unsigned, unsigned);
 123 int jffs2_commit_write (struct file *, struct page *, unsigned, unsigned);
 124
 125 /* ioctl.c */
 126 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
 127
 128 /* symlink.c */
 129 extern struct inode_operations jffs2_symlink_inode_operations;
 130
 131 /* fs.c */
 132 void jffs2_read_inode (struct inode *);
 133 void jffs2_clear_inode (struct inode *);
 134 struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
 135                                struct jffs2_raw_inode *ri);
 136 int jffs2_statfs (struct super_block *, struct statfs *);
 137 void jffs2_write_super (struct super_block *);
 138 int jffs2_remount_fs (struct super_block *, int *, char *);
 139 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
 140
 141 /* writev.c */
 142 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct iovec *vecs,
 143                        unsigned long count, loff_t to, size_t *retlen);
 144
 145 /* super.c */
 146
 147
 148 #endif /* __JFFS2_OS_LINUX_H__ */
 149
 150