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 1.37 2003/10/11 11:47:23 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 #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)) ) )
  36 #else
  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)) ) )
  41 #endif
  42
  43
  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)
  48
  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)))
  52 #else
  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)))
  55 #endif
  56
  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)
  64 #else
  65 #define ITIME(x) (x)
  66 #define I_SEC(x) (x)
  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)
  70 #endif
  71
  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
  76 #else
  77 #define current_sig_lock current->sighand->siglock
  78 #endif
  79
  80 #define sleep_on_spinunlock(wq, s)                              \
  81         do {                                                    \
  82                 DECLARE_WAITQUEUE(__wait, current);             \
  83                 add_wait_queue((wq), &__wait);                  \
  84                 set_current_state(TASK_UNINTERRUPTIBLE);        \
  85                 spin_unlock(s);                                 \
  86                 schedule();                                     \
  87                 remove_wait_queue((wq), &__wait);               \
  88         } while(0)
  89
  90 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
  91 {
  92 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
  93         f->highest_version = 0;
  94         f->fragtree = RB_ROOT;
  95         f->metadata = NULL;
  96         f->dents = NULL;
  97         f->flags = 0;
  98         f->usercompr = 0;
  99 #else
 100         memset(f, 0, sizeof(*f));
 101         init_MUTEX_LOCKED(&f->sem);
 102 #endif
 103 }
 104
 105 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
 106
 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)
 111
 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
 124
 125 #else /* NAND support present */
 126
 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)
 129
 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)
 133 struct kstatfs;
 134
 135 /* wbuf.c */
 136 int jffs2_flash_writev(struct jffs2_sb_info *c, const struct iovec *vecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino);
 137 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
 138 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
 139 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
 140 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 141 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 142 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 143 void jffs2_wbuf_timeout(unsigned long data);
 144 void jffs2_wbuf_process(void *data);
 145 int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
 146 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
 147 #endif /* NAND */
 148
 149 /* background.c */
 150 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
 151 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
 152 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
 153
 154 /* dir.c */
 155 extern struct file_operations jffs2_dir_operations;
 156 extern struct inode_operations jffs2_dir_inode_operations;
 157
 158 /* file.c */
 159 extern struct file_operations jffs2_file_operations;
 160 extern struct inode_operations jffs2_file_inode_operations;
 161 extern struct address_space_operations jffs2_file_address_operations;
 162 int jffs2_fsync(struct file *, struct dentry *, int);
 163 int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg);
 164 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
 165 int jffs2_readpage (struct file *, struct page *);
 166 int jffs2_prepare_write (struct file *, struct page *, unsigned, unsigned);
 167 int jffs2_commit_write (struct file *, struct page *, unsigned, unsigned);
 168
 169 /* ioctl.c */
 170 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
 171
 172 /* symlink.c */
 173 extern struct inode_operations jffs2_symlink_inode_operations;
 174
 175 /* fs.c */
 176 int jffs2_setattr (struct dentry *, struct iattr *);
 177 void jffs2_read_inode (struct inode *);
 178 void jffs2_clear_inode (struct inode *);
 179 void jffs2_dirty_inode(struct inode *inode);
 180 struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
 181                                struct jffs2_raw_inode *ri);
 182 int jffs2_statfs (struct super_block *, struct kstatfs *);
 183 void jffs2_write_super (struct super_block *);
 184 int jffs2_remount_fs (struct super_block *, int *, char *);
 185 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
 186
 187 /* writev.c */
 188 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct iovec *vecs,
 189                        unsigned long count, loff_t to, size_t *retlen);
 190
 191 /* super.c */
 192
 193
 194 #endif /* __JFFS2_OS_LINUX_H__ */
 195
 196