os-linux.h 7.4 KB

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  1. /*
  2. * JFFS2 -- Journalling Flash File System, Version 2.
  3. *
  4. * Copyright © 2001-2007 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. */
  11. #ifndef __JFFS2_OS_LINUX_H__
  12. #define __JFFS2_OS_LINUX_H__
  13. /* JFFS2 uses Linux mode bits natively -- no need for conversion */
  14. #define os_to_jffs2_mode(x) (x)
  15. #define jffs2_to_os_mode(x) (x)
  16. struct kstatfs;
  17. struct kvec;
  18. #define JFFS2_INODE_INFO(i) (container_of(i, struct jffs2_inode_info, vfs_inode))
  19. #define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode)
  20. #define JFFS2_SB_INFO(sb) (sb->s_fs_info)
  21. #define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv)
  22. #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
  23. #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
  24. #define JFFS2_F_I_UID(f) (i_uid_read(OFNI_EDONI_2SFFJ(f)))
  25. #define JFFS2_F_I_GID(f) (i_gid_read(OFNI_EDONI_2SFFJ(f)))
  26. #define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev)
  27. #define JFFS2_CLAMP_TIME(t) ((uint32_t)clamp_t(time64_t, (t), 0, U32_MAX))
  28. #define ITIME(sec) ((struct timespec64){sec, 0})
  29. #define JFFS2_NOW() JFFS2_CLAMP_TIME(ktime_get_real_seconds())
  30. #define I_SEC(tv) JFFS2_CLAMP_TIME((tv).tv_sec)
  31. #define JFFS2_F_I_CTIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_ctime)
  32. #define JFFS2_F_I_MTIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_mtime)
  33. #define JFFS2_F_I_ATIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_atime)
  34. #define sleep_on_spinunlock(wq, s) \
  35. do { \
  36. DECLARE_WAITQUEUE(__wait, current); \
  37. add_wait_queue((wq), &__wait); \
  38. set_current_state(TASK_UNINTERRUPTIBLE); \
  39. spin_unlock(s); \
  40. schedule(); \
  41. remove_wait_queue((wq), &__wait); \
  42. } while(0)
  43. static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
  44. {
  45. f->highest_version = 0;
  46. f->fragtree = RB_ROOT;
  47. f->metadata = NULL;
  48. f->dents = NULL;
  49. f->target = NULL;
  50. f->flags = 0;
  51. f->usercompr = 0;
  52. }
  53. #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & SB_RDONLY)
  54. #define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) )
  55. #ifndef CONFIG_JFFS2_FS_WRITEBUFFER
  56. #ifdef CONFIG_JFFS2_SUMMARY
  57. #define jffs2_can_mark_obsolete(c) (0)
  58. #else
  59. #define jffs2_can_mark_obsolete(c) (1)
  60. #endif
  61. #define jffs2_is_writebuffered(c) (0)
  62. #define jffs2_cleanmarker_oob(c) (0)
  63. #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
  64. #define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf)
  65. #define jffs2_flash_read(c, ofs, len, retlen, buf) (mtd_read((c)->mtd, ofs, len, retlen, buf))
  66. #define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; })
  67. #define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; })
  68. #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
  69. #define jffs2_nand_flash_setup(c) (0)
  70. #define jffs2_nand_flash_cleanup(c) do {} while(0)
  71. #define jffs2_wbuf_dirty(c) (0)
  72. #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
  73. #define jffs2_wbuf_timeout NULL
  74. #define jffs2_wbuf_process NULL
  75. #define jffs2_dataflash(c) (0)
  76. #define jffs2_dataflash_setup(c) (0)
  77. #define jffs2_dataflash_cleanup(c) do {} while (0)
  78. #define jffs2_nor_wbuf_flash(c) (0)
  79. #define jffs2_nor_wbuf_flash_setup(c) (0)
  80. #define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0)
  81. #define jffs2_ubivol(c) (0)
  82. #define jffs2_ubivol_setup(c) (0)
  83. #define jffs2_ubivol_cleanup(c) do {} while (0)
  84. #define jffs2_dirty_trigger(c) do {} while (0)
  85. #else /* NAND and/or ECC'd NOR support present */
  86. #define jffs2_is_writebuffered(c) (c->wbuf != NULL)
  87. #ifdef CONFIG_JFFS2_SUMMARY
  88. #define jffs2_can_mark_obsolete(c) (0)
  89. #else
  90. #define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE))
  91. #endif
  92. #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
  93. #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
  94. /* wbuf.c */
  95. 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);
  96. int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
  97. int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
  98. int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
  99. int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
  100. int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
  101. int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
  102. void jffs2_wbuf_timeout(unsigned long data);
  103. void jffs2_wbuf_process(void *data);
  104. int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
  105. int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
  106. int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
  107. void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
  108. #define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
  109. int jffs2_dataflash_setup(struct jffs2_sb_info *c);
  110. void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
  111. #define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME)
  112. int jffs2_ubivol_setup(struct jffs2_sb_info *c);
  113. void jffs2_ubivol_cleanup(struct jffs2_sb_info *c);
  114. #define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE))
  115. int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
  116. void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);
  117. void jffs2_dirty_trigger(struct jffs2_sb_info *c);
  118. #endif /* WRITEBUFFER */
  119. /* background.c */
  120. int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
  121. void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
  122. void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
  123. /* dir.c */
  124. extern const struct file_operations jffs2_dir_operations;
  125. extern const struct inode_operations jffs2_dir_inode_operations;
  126. /* file.c */
  127. extern const struct file_operations jffs2_file_operations;
  128. extern const struct inode_operations jffs2_file_inode_operations;
  129. extern const struct address_space_operations jffs2_file_address_operations;
  130. int jffs2_fsync(struct file *, loff_t, loff_t, int);
  131. int jffs2_do_readpage_unlock(void *data, struct page *pg);
  132. /* ioctl.c */
  133. long jffs2_ioctl(struct file *, unsigned int, unsigned long);
  134. /* symlink.c */
  135. extern const struct inode_operations jffs2_symlink_inode_operations;
  136. /* fs.c */
  137. int jffs2_setattr (struct dentry *, struct iattr *);
  138. int jffs2_do_setattr (struct inode *, struct iattr *);
  139. struct inode *jffs2_iget(struct super_block *, unsigned long);
  140. void jffs2_evict_inode (struct inode *);
  141. void jffs2_dirty_inode(struct inode *inode, int flags);
  142. struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode,
  143. struct jffs2_raw_inode *ri);
  144. int jffs2_statfs (struct dentry *, struct kstatfs *);
  145. int jffs2_do_remount_fs(struct super_block *sb, struct fs_context *fc);
  146. int jffs2_do_fill_super(struct super_block *sb, struct fs_context *fc);
  147. void jffs2_gc_release_inode(struct jffs2_sb_info *c,
  148. struct jffs2_inode_info *f);
  149. struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
  150. int inum, int unlinked);
  151. unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
  152. struct jffs2_inode_info *f,
  153. unsigned long offset,
  154. unsigned long *priv);
  155. void jffs2_flash_cleanup(struct jffs2_sb_info *c);
  156. /* writev.c */
  157. int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
  158. unsigned long count, loff_t to, size_t *retlen);
  159. int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
  160. size_t *retlen, const u_char *buf);
  161. #endif /* __JFFS2_OS_LINUX_H__ */