LXR linux-bk/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
  26struct kstatfs;
  27struct 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
  85static 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 */
 129int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino);
 130int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
 131int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
 132int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
 133int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 134int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 135int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
 136void jffs2_wbuf_timeout(unsigned long data);
 137void jffs2_wbuf_process(void *data);
 138int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
 139void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
 140#endif /* NAND */
 141
 142/* erase.c */
 143static 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 */
 149int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
 150void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
 151void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
 152
 153/* dir.c */
 154extern struct file_operations jffs2_dir_operations;
 155extern struct inode_operations jffs2_dir_inode_operations;
 156
 157/* file.c */
 158extern struct file_operations jffs2_file_operations;
 159extern struct inode_operations jffs2_file_inode_operations;
 160extern struct address_space_operations jffs2_file_address_operations;
 161int jffs2_fsync(struct file *, struct dentry *, int);
 162int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg);
 163int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
 164int jffs2_readpage (struct file *, struct page *);
 165int jffs2_prepare_write (struct file *, struct page *, unsigned, unsigned);
 166int jffs2_commit_write (struct file *, struct page *, unsigned, unsigned);
 167
 168/* ioctl.c */
 169int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
 170
 171/* symlink.c */
 172extern struct inode_operations jffs2_symlink_inode_operations;
 173
 174/* fs.c */
 175int jffs2_setattr (struct dentry *, struct iattr *);
 176void jffs2_read_inode (struct inode *);
 177void jffs2_clear_inode (struct inode *);
 178void jffs2_dirty_inode(struct inode *inode);
 179struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
 180                               struct jffs2_raw_inode *ri);
 181int jffs2_statfs (struct super_block *, struct kstatfs *);
 182void jffs2_write_super (struct super_block *);
 183int jffs2_remount_fs (struct super_block *, int *, char *);
 184int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
 185void jffs2_gc_release_inode(struct jffs2_sb_info *c,
 186                            struct jffs2_inode_info *f);
 187struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
 188                                              int inum, int nlink);
 189
 190unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, 
 191                                   struct jffs2_inode_info *f, 
 192                                   unsigned long offset,
 193                                   unsigned long *priv);
 194void jffs2_gc_release_page(struct jffs2_sb_info *c,
 195                           unsigned char *pg,
 196                           unsigned long *priv);
 197int jffs2_flash_setup(struct jffs2_sb_info *c);
 198void jffs2_flash_cleanup(struct jffs2_sb_info *c);
 199     
 200
 201/* writev.c */
 202int 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
 209