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} 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) ((c)->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 99#else /* NAND and/or ECC'd NOR support present */ 100 101#define jffs2_is_writebuffered(c) (c->wbuf != NULL) 102 103#ifdef CONFIG_JFFS2_SUMMARY 104#define jffs2_can_mark_obsolete(c) (0) 105#else 106#define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE)) 107#endif 108 109#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) 110 111#define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf)) 112#define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf)) 113#define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) 114 115/* wbuf.c */ 116int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino); 117int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); 118int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); 119int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); 120int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 121int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 122int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); 123void jffs2_wbuf_timeout(unsigned long data); 124void jffs2_wbuf_process(void *data); 125int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); 126int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); 127int jffs2_nand_flash_setup(struct jffs2_sb_info *c); 128void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); 129 130#define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH) 131int jffs2_dataflash_setup(struct jffs2_sb_info *c); 132void jffs2_dataflash_cleanup(struct jffs2_sb_info *c); 133#define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME) 134int jffs2_ubivol_setup(struct jffs2_sb_info *c); 135void jffs2_ubivol_cleanup(struct jffs2_sb_info *c); 136 137#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE)) 138int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c); 139void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c); 140 141#endif /* WRITEBUFFER */ 142 143static inline void jffs2_dirty_trigger(struct jffs2_sb_info *c) 144{ 145 OFNI_BS_2SFFJ(c)->s_dirt = 1; 146} 147 148/* background.c */ 149int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); 150void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); 151void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); 152 153/* dir.c */ 154extern const struct file_operations jffs2_dir_operations; 155extern const struct inode_operations jffs2_dir_inode_operations; 156 157/* file.c */ 158extern const struct file_operations jffs2_file_operations; 159extern const struct inode_operations jffs2_file_inode_operations; 160extern const struct address_space_operations jffs2_file_address_operations; 161int jffs2_fsync(struct file *, int); 162int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg); 163 164/* ioctl.c */ 165long jffs2_ioctl(struct file *, unsigned int, unsigned long); 166 167/* symlink.c */ 168extern const struct inode_operations jffs2_symlink_inode_operations; 169 170/* fs.c */ 171int jffs2_setattr (struct dentry *, struct iattr *); 172int jffs2_do_setattr (struct inode *, struct iattr *); 173struct inode *jffs2_iget(struct super_block *, unsigned long); 174void jffs2_evict_inode (struct inode *); 175void jffs2_dirty_inode(struct inode *inode); 176struct inode *jffs2_new_inode (struct inode *dir_i, int mode, 177 struct jffs2_raw_inode *ri); 178int jffs2_statfs (struct dentry *, struct kstatfs *); 179int jffs2_remount_fs (struct super_block *, int *, char *); 180int jffs2_do_fill_super(struct super_block *sb, void *data, int silent); 181void jffs2_gc_release_inode(struct jffs2_sb_info *c, 182 struct jffs2_inode_info *f); 183struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, 184 int inum, int unlinked); 185 186unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, 187 struct jffs2_inode_info *f, 188 unsigned long offset, 189 unsigned long *priv); 190void jffs2_gc_release_page(struct jffs2_sb_info *c, 191 unsigned char *pg, 192 unsigned long *priv); 193void jffs2_flash_cleanup(struct jffs2_sb_info *c); 194 195 196/* writev.c */ 197int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, 198 unsigned long count, loff_t to, size_t *retlen); 199int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, 200 size_t *retlen, const u_char *buf); 201 202#endif /* __JFFS2_OS_LINUX_H__ */ 203