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@infradead.org>
   7  *
   8  * For licensing information, see the file 'LICENCE' in this directory.
   9  *
  10  * $Id: os-linux.h,v 1.58 2005/07/12 02:34:35 tpoynor Exp $
  11  *
  12  */
  13
  14 #ifndef __JFFS2_OS_LINUX_H__
  15 #define __JFFS2_OS_LINUX_H__
  16
  17 /* JFFS2 uses Linux mode bits natively -- no need for conversion */
  18 #define os_to_jffs2_mode(x) (x)
  19 #define jffs2_to_os_mode(x) (x)
  20
  21 struct kstatfs;
  22 struct kvec;
  23
  24 #define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode))
  25 #define OFNI_EDONI_2SFFJ(f)  (&(f)->vfs_inode)
  26 #define JFFS2_SB_INFO(sb) (sb->s_fs_info)
  27 #define OFNI_BS_2SFFJ(c)  ((struct super_block *)c->os_priv)
  28
  29
  30 #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
  31 #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
  32 #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid)
  33 #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid)
  34
  35 #define JFFS2_F_I_RDEV_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f)))
  36 #define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f)))
  37
  38 #define ITIME(sec) ((struct timespec){sec, 0})
  39 #define I_SEC(tv) ((tv).tv_sec)
  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 #define sleep_on_spinunlock(wq, s)                              \
  45         do {                                                    \
  46                 DECLARE_WAITQUEUE(__wait, current);             \
  47                 add_wait_queue((wq), &__wait);                  \
  48                 set_current_state(TASK_UNINTERRUPTIBLE);        \
  49                 spin_unlock(s);                                 \
  50                 schedule();                                     \
  51                 remove_wait_queue((wq), &__wait);               \
  52         } while(0)
  53
  54 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
  55 {
  56         f->highest_version = 0;
  57         f->fragtree = RB_ROOT;
  58         f->metadata = NULL;
  59         f->dents = NULL;
  60         f->flags = 0;
  61         f->usercompr = 0;
  62 }
  63
  64
  65 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
  66
  67 #ifndef CONFIG_JFFS2_FS_WRITEBUFFER
  68 #define SECTOR_ADDR(x) ( ((unsigned long)(x) & ~(c->sector_size-1)) )
  69 #define jffs2_can_mark_obsolete(c) (1)
  70 #define jffs2_is_writebuffered(c) (0)
  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_pad(c) ({ (void)(c), 0; })
  77 #define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; })
  78 #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
  79 #define jffs2_nand_flash_setup(c) (0)
  80 #define jffs2_nand_flash_cleanup(c) do {} while(0)
  81 #define jffs2_wbuf_dirty(c) (0)
  82 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
  83 #define jffs2_wbuf_timeout NULL
  84 #define jffs2_wbuf_process NULL
  85 #define jffs2_nor_ecc(c) (0)
  86 #define jffs2_dataflash(c) (0)
  87 #define jffs2_nor_ecc_flash_setup(c) (0)
  88 #define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)
  89 #define jffs2_dataflash_setup(c) (0)
  90 #define jffs2_dataflash_cleanup(c) do {} while (0)
  91
  92 #else /* NAND and/or ECC'd NOR support present */
  93
  94 #define jffs2_is_writebuffered(c) (c->wbuf != NULL)
  95 #define SECTOR_ADDR(x) ( ((unsigned long)(x) / (unsigned long)(c->sector_size)) * c->sector_size )
  96 #define jffs2_can_mark_obsolete(c) ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & MTD_ECC)) || c->mtd->type == MTD_RAM)
  97 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
  98
  99 #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
 100 #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
 101 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
 102
 103 /* wbuf.c */
 104 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);
 105 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
 106 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
 107 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
 108 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 109 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 110 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
 111 void jffs2_wbuf_timeout(unsigned long data);
 112 void jffs2_wbuf_process(void *data);
 113 int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
 114 int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
 115 int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
 116 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
 117
 118 #define jffs2_nor_ecc(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_ECC))
 119 int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c);
 120 void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c);
 121
 122 #define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
 123 int jffs2_dataflash_setup(struct jffs2_sb_info *c);
 124 void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
 125
 126 #endif /* WRITEBUFFER */
 127
 128 /* erase.c */
 129 static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
 130 {
 131         OFNI_BS_2SFFJ(c)->s_dirt = 1;
 132 }
 133
 134 /* background.c */
 135 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
 136 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
 137 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
 138
 139 /* dir.c */
 140 extern struct file_operations jffs2_dir_operations;
 141 extern struct inode_operations jffs2_dir_inode_operations;
 142
 143 /* file.c */
 144 extern struct file_operations jffs2_file_operations;
 145 extern struct inode_operations jffs2_file_inode_operations;
 146 extern struct address_space_operations jffs2_file_address_operations;
 147 int jffs2_fsync(struct file *, struct dentry *, int);
 148 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
 149
 150 /* ioctl.c */
 151 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
 152
 153 /* symlink.c */
 154 extern struct inode_operations jffs2_symlink_inode_operations;
 155
 156 /* fs.c */
 157 int jffs2_setattr (struct dentry *, struct iattr *);
 158 void jffs2_read_inode (struct inode *);
 159 void jffs2_clear_inode (struct inode *);
 160 void jffs2_dirty_inode(struct inode *inode);
 161 struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
 162                                struct jffs2_raw_inode *ri);
 163 int jffs2_statfs (struct super_block *, struct kstatfs *);
 164 void jffs2_write_super (struct super_block *);
 165 int jffs2_remount_fs (struct super_block *, int *, char *);
 166 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
 167 void jffs2_gc_release_inode(struct jffs2_sb_info *c,
 168                             struct jffs2_inode_info *f);
 169 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
 170                                               int inum, int nlink);
 171
 172 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
 173                                    struct jffs2_inode_info *f,
 174                                    unsigned long offset,
 175                                    unsigned long *priv);
 176 void jffs2_gc_release_page(struct jffs2_sb_info *c,
 177                            unsigned char *pg,
 178                            unsigned long *priv);
 179 void jffs2_flash_cleanup(struct jffs2_sb_info *c);
 180
 181
 182 /* writev.c */
 183 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
 184                        unsigned long count, loff_t to, size_t *retlen);
 185
 186
 187 #endif /* __JFFS2_OS_LINUX_H__ */
 188
 189