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 12 #ifndef __JFFS2_OS_LINUX_H__ 13 #define __JFFS2_OS_LINUX_H__ 14 15 /* JFFS2 uses Linux mode bits natively -- no need for conversion */ 16 #define os_to_jffs2_mode(x) (x) 17 #define jffs2_to_os_mode(x) (x) 18 19 struct kstatfs; 20 struct kvec; 21 22 #define JFFS2_INODE_INFO(i) (container_of(i, struct jffs2_inode_info, vfs_inode)) 23 #define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode) 24 #define JFFS2_SB_INFO(sb) (sb->s_fs_info) 25 #define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv) 26 27 28 #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size) 29 #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode) 30 #define JFFS2_F_I_UID(f) (i_uid_read(OFNI_EDONI_2SFFJ(f))) 31 #define JFFS2_F_I_GID(f) (i_gid_read(OFNI_EDONI_2SFFJ(f))) 32 #define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev) 33 34 #define ITIME(sec) ((struct timespec){sec, 0}) 35 #define I_SEC(tv) ((tv).tv_sec) 36 #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec) 37 #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec) 38 #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec) 39 40 #define sleep_on_spinunlock(wq, s) \ 41 do { \ 42 DECLARE_WAITQUEUE(__wait, current); \ 43 add_wait_queue((wq), &__wait); \ 44 set_current_state(TASK_UNINTERRUPTIBLE); \ 45 spin_unlock(s); \ 46 schedule(); \ 47 remove_wait_queue((wq), &__wait); \ 48 } while(0) 49 50 static inline void jffs2_init_inode_info(struct jffs2_inode_info *f) 51 { 52 f->highest_version = 0; 53 f->fragtree = RB_ROOT; 54 f->metadata = NULL; 55 f->dents = NULL; 56 f->target = NULL; 57 f->flags = 0; 58 f->usercompr = 0; 59 } 60 61 62 #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY) 63 64 #define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) ) 65 #ifndef CONFIG_JFFS2_FS_WRITEBUFFER 66 67 68 #ifdef CONFIG_JFFS2_SUMMARY 69 #define jffs2_can_mark_obsolete(c) (0) 70 #else 71 #define jffs2_can_mark_obsolete(c) (1) 72 #endif 73 74 #define jffs2_is_writebuffered(c) (0) 75 #define jffs2_cleanmarker_oob(c) (0) 76 #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) 77 78 #define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf) 79 #define jffs2_flash_read(c, ofs, len, retlen, buf) (mtd_read((c)->mtd, ofs, len, retlen, buf)) 80 #define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; }) 81 #define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; }) 82 #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1) 83 #define jffs2_nand_flash_setup(c) (0) 84 #define jffs2_nand_flash_cleanup(c) do {} while(0) 85 #define jffs2_wbuf_dirty(c) (0) 86 #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) 87 #define jffs2_wbuf_timeout NULL 88 #define jffs2_wbuf_process NULL 89 #define jffs2_dataflash(c) (0) 90 #define jffs2_dataflash_setup(c) (0) 91 #define jffs2_dataflash_cleanup(c) do {} while (0) 92 #define jffs2_nor_wbuf_flash(c) (0) 93 #define jffs2_nor_wbuf_flash_setup(c) (0) 94 #define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0) 95 #define jffs2_ubivol(c) (0) 96 #define jffs2_ubivol_setup(c) (0) 97 #define jffs2_ubivol_cleanup(c) do {} while (0) 98 #define jffs2_dirty_trigger(c) do {} while (0) 99 100 #else /* NAND and/or ECC'd NOR support present */ 101 102 #define jffs2_is_writebuffered(c) (c->wbuf != NULL) 103 104 #ifdef CONFIG_JFFS2_SUMMARY 105 #define jffs2_can_mark_obsolete(c) (0) 106 #else 107 #define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE)) 108 #endif 109 110 #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) 111 112 #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) 113 114 /* wbuf.c */ 115 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); 116 int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); 117 int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); 118 int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); 119 int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 120 int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 121 int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); 122 void jffs2_wbuf_timeout(unsigned long data); 123 void jffs2_wbuf_process(void *data); 124 int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); 125 int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); 126 int jffs2_nand_flash_setup(struct jffs2_sb_info *c); 127 void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); 128 129 #define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH) 130 int jffs2_dataflash_setup(struct jffs2_sb_info *c); 131 void jffs2_dataflash_cleanup(struct jffs2_sb_info *c); 132 #define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME) 133 int jffs2_ubivol_setup(struct jffs2_sb_info *c); 134 void jffs2_ubivol_cleanup(struct jffs2_sb_info *c); 135 136 #define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE)) 137 int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c); 138 void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c); 139 void jffs2_dirty_trigger(struct jffs2_sb_info *c); 140 141 #endif /* WRITEBUFFER */ 142 143 /* background.c */ 144 int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); 145 void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); 146 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); 147 148 /* dir.c */ 149 extern const struct file_operations jffs2_dir_operations; 150 extern const struct inode_operations jffs2_dir_inode_operations; 151 152 /* file.c */ 153 extern const struct file_operations jffs2_file_operations; 154 extern const struct inode_operations jffs2_file_inode_operations; 155 extern const struct address_space_operations jffs2_file_address_operations; 156 int jffs2_fsync(struct file *, loff_t, loff_t, int); 157 int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg); 158 159 /* ioctl.c */ 160 long jffs2_ioctl(struct file *, unsigned int, unsigned long); 161 162 /* symlink.c */ 163 extern const struct inode_operations jffs2_symlink_inode_operations; 164 165 /* fs.c */ 166 int jffs2_setattr (struct dentry *, struct iattr *); 167 int jffs2_do_setattr (struct inode *, struct iattr *); 168 struct inode *jffs2_iget(struct super_block *, unsigned long); 169 void jffs2_evict_inode (struct inode *); 170 void jffs2_dirty_inode(struct inode *inode, int flags); 171 struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode, 172 struct jffs2_raw_inode *ri); 173 int jffs2_statfs (struct dentry *, struct kstatfs *); 174 int jffs2_do_remount_fs(struct super_block *, int *, char *); 175 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent); 176 void jffs2_gc_release_inode(struct jffs2_sb_info *c, 177 struct jffs2_inode_info *f); 178 struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, 179 int inum, int unlinked); 180 181 unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, 182 struct jffs2_inode_info *f, 183 unsigned long offset, 184 unsigned long *priv); 185 void jffs2_gc_release_page(struct jffs2_sb_info *c, 186 unsigned char *pg, 187 unsigned long *priv); 188 void jffs2_flash_cleanup(struct jffs2_sb_info *c); 189 190 191 /* writev.c */ 192 int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, 193 unsigned long count, loff_t to, size_t *retlen); 194 int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, 195 size_t *retlen, const u_char *buf); 196 197 #endif /* __JFFS2_OS_LINUX_H__ */ 198 199 200