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 19struct kstatfs; 20struct kvec; 21 22#define JFFS2_INODE_INFO(i) (list_entry(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) (OFNI_EDONI_2SFFJ(f)->i_uid) 31#define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid) 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 50static 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#ifdef CONFIG_JFFS2_FS_POSIX_ACL 60 f->i_acl_access = JFFS2_ACL_NOT_CACHED; 61 f->i_acl_default = JFFS2_ACL_NOT_CACHED; 62#endif 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_dataflash(c) (0) 94#define jffs2_dataflash_setup(c) (0) 95#define jffs2_dataflash_cleanup(c) do {} while (0) 96#define jffs2_nor_wbuf_flash(c) (0) 97#define jffs2_nor_wbuf_flash_setup(c) (0) 98#define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0) 99#define jffs2_ubivol(c) (0) 100#define jffs2_ubivol_setup(c) (0) 101#define jffs2_ubivol_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) (c->mtd->flags & (MTD_BIT_WRITEABLE)) 111#endif 112 113#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) 114 115#define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf)) 116#define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf)) 117#define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) 118 119/* wbuf.c */ 120int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino); 121int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); 122int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); 123int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); 124int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 125int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 126int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); 127void jffs2_wbuf_timeout(unsigned long data); 128void jffs2_wbuf_process(void *data); 129int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); 130int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); 131int jffs2_nand_flash_setup(struct jffs2_sb_info *c); 132void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); 133 134#define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH) 135int jffs2_dataflash_setup(struct jffs2_sb_info *c); 136void jffs2_dataflash_cleanup(struct jffs2_sb_info *c); 137#define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME) 138int jffs2_ubivol_setup(struct jffs2_sb_info *c); 139void jffs2_ubivol_cleanup(struct jffs2_sb_info *c); 140 141#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE)) 142int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c); 143void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c); 144 145#endif /* WRITEBUFFER */ 146 147/* erase.c */ 148static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c) 149{ 150 OFNI_BS_2SFFJ(c)->s_dirt = 1; 151} 152 153/* background.c */ 154int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); 155void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); 156void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); 157 158/* dir.c */ 159extern const struct file_operations jffs2_dir_operations; 160extern const struct inode_operations jffs2_dir_inode_operations; 161 162/* file.c */ 163extern const struct file_operations jffs2_file_operations; 164extern const struct inode_operations jffs2_file_inode_operations; 165extern const struct address_space_operations jffs2_file_address_operations; 166int jffs2_fsync(struct file *, struct dentry *, int); 167int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg); 168 169/* ioctl.c */ 170int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long); 171 172/* symlink.c */ 173extern const struct inode_operations jffs2_symlink_inode_operations; 174 175/* fs.c */ 176int jffs2_setattr (struct dentry *, struct iattr *); 177void jffs2_read_inode (struct inode *); 178void jffs2_clear_inode (struct inode *); 179void jffs2_dirty_inode(struct inode *inode); 180struct inode *jffs2_new_inode (struct inode *dir_i, int mode, 181 struct jffs2_raw_inode *ri); 182int jffs2_statfs (struct dentry *, struct kstatfs *); 183void jffs2_write_super (struct super_block *); 184int jffs2_remount_fs (struct super_block *, int *, char *); 185int jffs2_do_fill_super(struct super_block *sb, void *data, int silent); 186void jffs2_gc_release_inode(struct jffs2_sb_info *c, 187 struct jffs2_inode_info *f); 188struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, 189 int inum, int nlink); 190 191unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, 192 struct jffs2_inode_info *f, 193 unsigned long offset, 194 unsigned long *priv); 195void jffs2_gc_release_page(struct jffs2_sb_info *c, 196 unsigned char *pg, 197 unsigned long *priv); 198void jffs2_flash_cleanup(struct jffs2_sb_info *c); 199 200 201/* writev.c */ 202int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, 203 unsigned long count, loff_t to, size_t *retlen); 204int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, 205 size_t *retlen, const u_char *buf); 206 207#endif /* __JFFS2_OS_LINUX_H__ */ 208