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 1.64 2005/09/30 13:59:13 dedekind 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->target = NULL;
  61         f->flags = 0;
  62         f->usercompr = 0;
  63 }
  64
  65
  66 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
  67
  68 #define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) )
  69 #ifndef CONFIG_JFFS2_FS_WRITEBUFFER
  70
  71
  72 #ifdef CONFIG_JFFS2_SUMMARY
  73 #define jffs2_can_mark_obsolete(c) (0)
  74 #else
  75 #define jffs2_can_mark_obsolete(c) (1)
  76 #endif
  77
  78 #define jffs2_is_writebuffered(c) (0)
  79 #define jffs2_cleanmarker_oob(c) (0)
  80 #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
  81
  82 #define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf)
  83 #define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf))
  84 #define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; })
  85 #define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; })
  86 #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
  87 #define jffs2_nand_flash_setup(c) (0)
  88 #define jffs2_nand_flash_cleanup(c) do {} while(0)
  89 #define jffs2_wbuf_dirty(c) (0)
  90 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
  91 #define jffs2_wbuf_timeout NULL
  92 #define jffs2_wbuf_process NULL
  93 #define jffs2_nor_ecc(c) (0)
  94 #define jffs2_dataflash(c) (0)
  95 #define jffs2_nor_wbuf_flash(c) (0)
  96 #define jffs2_nor_ecc_flash_setup(c) (0)
  97 #define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)
  98 #define jffs2_dataflash_setup(c) (0)
  99 #define jffs2_dataflash_cleanup(c) do {} while (0)
 100 #define jffs2_nor_wbuf_flash_setup(c) (0)
 101 #define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0)
 102
 103 #else /* NAND and/or ECC'd NOR support present */
 104
 105 #define jffs2_is_writebuffered(c) (c->wbuf != NULL)
 106
 107 #ifdef CONFIG_JFFS2_SUMMARY
 108 #define jffs2_can_mark_obsolete(c) (0)
 109 #else
 110 #define jffs2_can_mark_obsolete(c) \
 111   ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & (MTD_ECC|MTD_PROGRAM_REGIONS))) || \
 112    c->mtd->type == MTD_RAM)
 113 #endif
 114
 115 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
 116
 117 #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
 118 #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
 119 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
 120
 121 /* wbuf.c */
 122 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);
 123 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
 124 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
 125 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
 126 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 127 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 128 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
 129 void jffs2_wbuf_timeout(unsigned long data);
 130 void jffs2_wbuf_process(void *data);
 131 int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
 132 int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
 133 int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
 134 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
 135
 136 #define jffs2_nor_ecc(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_ECC))
 137 int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c);
 138 void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c);
 139
 140 #define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
 141 int jffs2_dataflash_setup(struct jffs2_sb_info *c);
 142 void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
 143
 144 #define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_PROGRAM_REGIONS))
 145 int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
 146 void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);
 147
 148 #endif /* WRITEBUFFER */
 149
 150 /* erase.c */
 151 static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
 152 {
 153         OFNI_BS_2SFFJ(c)->s_dirt = 1;
 154 }
 155
 156 /* background.c */
 157 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
 158 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
 159 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
 160
 161 /* dir.c */
 162 extern const struct file_operations jffs2_dir_operations;
 163 extern struct inode_operations jffs2_dir_inode_operations;
 164
 165 /* file.c */
 166 extern const struct file_operations jffs2_file_operations;
 167 extern struct inode_operations jffs2_file_inode_operations;
 168 extern struct address_space_operations jffs2_file_address_operations;
 169 int jffs2_fsync(struct file *, struct dentry *, int);
 170 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
 171
 172 /* ioctl.c */
 173 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
 174
 175 /* symlink.c */
 176 extern struct inode_operations jffs2_symlink_inode_operations;
 177
 178 /* fs.c */
 179 int jffs2_setattr (struct dentry *, struct iattr *);
 180 void jffs2_read_inode (struct inode *);
 181 void jffs2_clear_inode (struct inode *);
 182 void jffs2_dirty_inode(struct inode *inode);
 183 struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
 184                                struct jffs2_raw_inode *ri);
 185 int jffs2_statfs (struct super_block *, struct kstatfs *);
 186 void jffs2_write_super (struct super_block *);
 187 int jffs2_remount_fs (struct super_block *, int *, char *);
 188 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
 189 void jffs2_gc_release_inode(struct jffs2_sb_info *c,
 190                             struct jffs2_inode_info *f);
 191 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
 192                                               int inum, int nlink);
 193
 194 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
 195                                    struct jffs2_inode_info *f,
 196                                    unsigned long offset,
 197                                    unsigned long *priv);
 198 void jffs2_gc_release_page(struct jffs2_sb_info *c,
 199                            unsigned char *pg,
 200                            unsigned long *priv);
 201 void jffs2_flash_cleanup(struct jffs2_sb_info *c);
 202
 203
 204 /* writev.c */
 205 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
 206                        unsigned long count, loff_t to, size_t *retlen);
 207 int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
 208                         size_t *retlen, const u_char *buf);
 209
 210 #endif /* __JFFS2_OS_LINUX_H__ */
 211
 212