fs/jffs2.org/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 #if 1   // mask by Victor Yu. 05-14-2007
  76 #define sleep_on_spinunlock(wq, s)                              \
  77         do {                                                    \
  78                 DECLARE_WAITQUEUE(__wait, current);             \
  79                 add_wait_queue((wq), &__wait);                  \
  80                 set_current_state(TASK_UNINTERRUPTIBLE);        \
  81                 spin_unlock(s);                                 \
  82                 schedule();                                     \
  83                 remove_wait_queue((wq), &__wait);               \
  84         } while(0)
  85 #else
  86 #define sleep_on_spinunlock(wq, s)                              \
  87         do {                                                    \
  88                 DECLARE_WAITQUEUE(__wait, current);             \
  89                 add_wait_queue((wq), &__wait);                  \
  90                 spin_unlock(s);                                 \
  91                 schedule();                                     \
  92                 remove_wait_queue((wq), &__wait);               \
  93         } while(0)
  94 #endif
  95
  96 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
  97 {
  98 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2)
  99         f->highest_version = 0;
 100         f->fragtree = RB_ROOT;
 101         f->metadata = NULL;
 102         f->dents = NULL;
 103         f->flags = 0;
 104         f->usercompr = 0;
 105 #else
 106         memset(f, 0, sizeof(*f));
 107         init_MUTEX_LOCKED(&f->sem);
 108 #endif
 109 }
 110
 111 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY)
 112
 113 #ifndef CONFIG_JFFS2_FS_NAND
 114 #define jffs2_can_mark_obsolete(c) (1)
 115 #define jffs2_cleanmarker_oob(c) (0)
 116 #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
 117
 118 #define jffs2_flash_write(c, ofs, len, retlen, buf) ((c)->mtd->write((c)->mtd, ofs, len, retlen, buf))
 119 #define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf))
 120 #define jffs2_flush_wbuf_pad(c) ({ (void)(c), 0; })
 121 #define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; })
 122 #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
 123 #define jffs2_nand_flash_setup(c) (0)
 124 #define jffs2_nand_flash_cleanup(c) do {} while(0)
 125 #define jffs2_wbuf_dirty(c) (0)
 126 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
 127 #define jffs2_wbuf_timeout NULL
 128 #define jffs2_wbuf_process NULL
 129
 130 #else /* NAND support present */
 131
 132 #define jffs2_can_mark_obsolete(c) (c->mtd->type == MTD_NORFLASH || c->mtd->type == MTD_RAM)
 133 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
 134
 135 #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
 136 #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf))
 137 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
 138
 139 /* wbuf.c */
 140 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);
 141 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
 142 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
 143 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
 144 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 145 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
 146 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
 147 void jffs2_wbuf_timeout(unsigned long data);
 148 void jffs2_wbuf_process(void *data);
 149 int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
 150 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
 151 #endif /* NAND */
 152
 153 /* erase.c */
 154 static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c)
 155 {
 156         OFNI_BS_2SFFJ(c)->s_dirt = 1;
 157 }
 158
 159 /* background.c */
 160 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
 161 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
 162 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
 163
 164 /* dir.c */
 165 extern struct file_operations jffs2_dir_operations;
 166 extern struct inode_operations jffs2_dir_inode_operations;
 167
 168 /* file.c */
 169 extern struct file_operations jffs2_file_operations;
 170 extern struct inode_operations jffs2_file_inode_operations;
 171 extern struct address_space_operations jffs2_file_address_operations;
 172 int jffs2_fsync(struct file *, struct dentry *, int);
 173 int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg);
 174 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
 175 int jffs2_readpage (struct file *, struct page *);
 176 int jffs2_prepare_write (struct file *, struct page *, unsigned, unsigned);
 177 int jffs2_commit_write (struct file *, struct page *, unsigned, unsigned);
 178
 179 /* ioctl.c */
 180 int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
 181
 182 /* symlink.c */
 183 extern struct inode_operations jffs2_symlink_inode_operations;
 184
 185 /* fs.c */
 186 int jffs2_setattr (struct dentry *, struct iattr *);
 187 void jffs2_read_inode (struct inode *);
 188 void jffs2_clear_inode (struct inode *);
 189 void jffs2_dirty_inode(struct inode *inode);
 190 struct inode *jffs2_new_inode (struct inode *dir_i, int mode,
 191                                struct jffs2_raw_inode *ri);
 192 int jffs2_statfs (struct super_block *, struct kstatfs *);
 193 void jffs2_write_super (struct super_block *);
 194 int jffs2_remount_fs (struct super_block *, int *, char *);
 195 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent);
 196 void jffs2_gc_release_inode(struct jffs2_sb_info *c,
 197                             struct jffs2_inode_info *f);
 198 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
 199                                               int inum, int nlink);
 200
 201 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
 202                                    struct jffs2_inode_info *f,
 203                                    unsigned long offset,
 204                                    unsigned long *priv);
 205 void jffs2_gc_release_page(struct jffs2_sb_info *c,
 206                            unsigned char *pg,
 207                            unsigned long *priv);
 208 int jffs2_flash_setup(struct jffs2_sb_info *c);
 209 void jffs2_flash_cleanup(struct jffs2_sb_info *c);
 210
 211
 212 /* writev.c */
 213 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
 214                        unsigned long count, loff_t to, size_t *retlen);
 215
 216
 217 #endif /* __JFFS2_OS_LINUX_H__ */
 218
 219