fs/jffs2/os-linux.h

   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@redhat.com>
   7  *
   8  * For licensing information, see the file 'LICENCE' in this directory.
   9  *
  10  * $Id: os-linux.h,v 1.47 2004/07/14 13:20:23 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 #ifndef CONFIG_JFFS2_FS_NAND
 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
 119 #else /* NAND support present */
 120
 121 #define jffs2_can_mark_obsolete(c) (c->mtd->type == MTD_NORFLASH || c->mtd->type == MTD_RAM)
 122 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
 123
 124 #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
 125 #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
 126 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
 127
 128 /* wbuf.c */
 129 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);
 130 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
 131 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
 132 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
 133 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 134 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 135 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
 136 void jffs2_wbuf_timeout(unsigned long data);
 137 void jffs2_wbuf_process(void *data);
 138 int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
 139 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
 140 #endif /* NAND */
 141
 142 /* erase.c */
 143 static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
 144 {
 145         OFNI_BS_2SFFJ(c)->s_dirt = 1;
 146 }
 147
 148 /* background.c */
 149 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
 150 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
 151 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
 152
 153 /* dir.c */
 154 extern struct file_operations jffs2_dir_operations;
 155 extern struct inode_operations jffs2_dir_inode_operations;
 156
 157 /* file.c */
 158 extern struct file_operations jffs2_file_operations;
 159 extern struct inode_operations jffs2_file_inode_operations;
 160 extern struct address_space_operations jffs2_file_address_operations;
 161 int jffs2_fsync(struct file *, struct dentry *, int);
 162 int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg);
 163 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
 164 int jffs2_readpage (struct file *, struct page *);
 165 int jffs2_prepare_write (struct file *, struct page *, unsigned, unsigned);
 166 int jffs2_commit_write (struct file *, struct page *, unsigned, unsigned);
 167
 168 /* ioctl.c */
 169 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
 170
 171 /* symlink.c */
 172 extern struct inode_operations jffs2_symlink_inode_operations;
 173
 174 /* fs.c */
 175 int jffs2_setattr (struct dentry *, struct iattr *);
 176 void jffs2_read_inode (struct inode *);
 177 void jffs2_clear_inode (struct inode *);
 178 void jffs2_dirty_inode(struct inode *inode);
 179 struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
 180                                struct jffs2_raw_inode *ri);
 181 int jffs2_statfs (struct super_block *, struct kstatfs *);
 182 void jffs2_write_super (struct super_block *);
 183 int jffs2_remount_fs (struct super_block *, int *, char *);
 184 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
 185 void jffs2_gc_release_inode(struct jffs2_sb_info *c,
 186                             struct jffs2_inode_info *f);
 187 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
 188                                               int inum, int nlink);
 189
 190 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
 191                                    struct jffs2_inode_info *f,
 192                                    unsigned long offset,
 193                                    unsigned long *priv);
 194 void jffs2_gc_release_page(struct jffs2_sb_info *c,
 195                            unsigned char *pg,
 196                            unsigned long *priv);
 197 int jffs2_flash_setup(struct jffs2_sb_info *c);
 198 void jffs2_flash_cleanup(struct jffs2_sb_info *c);
 199
 200
 201 /* writev.c */
 202 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
 203                        unsigned long count, loff_t to, size_t *retlen);
 204
 205
 206 #endif /* __JFFS2_OS_LINUX_H__ */
 207
 208