11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * JFFS2 -- Journalling Flash File System, Version 2. 31da177e4SLinus Torvalds * 4c00c310eSDavid Woodhouse * Copyright © 2001-2007 Red Hat, Inc. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Created by David Woodhouse <dwmw2@infradead.org> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * For licensing information, see the file 'LICENCE' in this directory. 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #ifndef __JFFS2_OS_LINUX_H__ 131da177e4SLinus Torvalds #define __JFFS2_OS_LINUX_H__ 141da177e4SLinus Torvalds 151da177e4SLinus Torvalds /* JFFS2 uses Linux mode bits natively -- no need for conversion */ 161da177e4SLinus Torvalds #define os_to_jffs2_mode(x) (x) 171da177e4SLinus Torvalds #define jffs2_to_os_mode(x) (x) 181da177e4SLinus Torvalds 191da177e4SLinus Torvalds struct kstatfs; 201da177e4SLinus Torvalds struct kvec; 211da177e4SLinus Torvalds 22db6172c4SRasmus Villemoes #define JFFS2_INODE_INFO(i) (container_of(i, struct jffs2_inode_info, vfs_inode)) 231da177e4SLinus Torvalds #define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode) 241da177e4SLinus Torvalds #define JFFS2_SB_INFO(sb) (sb->s_fs_info) 251da177e4SLinus Torvalds #define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv) 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size) 291da177e4SLinus Torvalds #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode) 300cfe53d3SEric W. Biederman #define JFFS2_F_I_UID(f) (i_uid_read(OFNI_EDONI_2SFFJ(f))) 310cfe53d3SEric W. Biederman #define JFFS2_F_I_GID(f) (i_gid_read(OFNI_EDONI_2SFFJ(f))) 32aef9ab47SDavid Woodhouse #define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev) 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds #define ITIME(sec) ((struct timespec){sec, 0}) 351da177e4SLinus Torvalds #define I_SEC(tv) ((tv).tv_sec) 361da177e4SLinus Torvalds #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec) 371da177e4SLinus Torvalds #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec) 381da177e4SLinus Torvalds #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec) 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds #define sleep_on_spinunlock(wq, s) \ 411da177e4SLinus Torvalds do { \ 421da177e4SLinus Torvalds DECLARE_WAITQUEUE(__wait, current); \ 431da177e4SLinus Torvalds add_wait_queue((wq), &__wait); \ 441da177e4SLinus Torvalds set_current_state(TASK_UNINTERRUPTIBLE); \ 451da177e4SLinus Torvalds spin_unlock(s); \ 461da177e4SLinus Torvalds schedule(); \ 471da177e4SLinus Torvalds remove_wait_queue((wq), &__wait); \ 481da177e4SLinus Torvalds } while(0) 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds static inline void jffs2_init_inode_info(struct jffs2_inode_info *f) 511da177e4SLinus Torvalds { 521da177e4SLinus Torvalds f->highest_version = 0; 531da177e4SLinus Torvalds f->fragtree = RB_ROOT; 541da177e4SLinus Torvalds f->metadata = NULL; 551da177e4SLinus Torvalds f->dents = NULL; 562b79adccSArtem B. Bityutskiy f->target = NULL; 571da177e4SLinus Torvalds f->flags = 0; 581da177e4SLinus Torvalds f->usercompr = 0; 591da177e4SLinus Torvalds } 601da177e4SLinus Torvalds 613be36675SAndrew Victor 621751e8a6SLinus Torvalds #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & SB_RDONLY) 631da177e4SLinus Torvalds 64daba5cc4SArtem B. Bityutskiy #define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) ) 652f82ce1eSAndrew Victor #ifndef CONFIG_JFFS2_FS_WRITEBUFFER 66daba5cc4SArtem B. Bityutskiy 67e631ddbaSFerenc Havasi 68e631ddbaSFerenc Havasi #ifdef CONFIG_JFFS2_SUMMARY 69e631ddbaSFerenc Havasi #define jffs2_can_mark_obsolete(c) (0) 70e631ddbaSFerenc Havasi #else 711da177e4SLinus Torvalds #define jffs2_can_mark_obsolete(c) (1) 72e631ddbaSFerenc Havasi #endif 73e631ddbaSFerenc Havasi 748cd79216SArtem B. Bityuckiy #define jffs2_is_writebuffered(c) (0) 751da177e4SLinus Torvalds #define jffs2_cleanmarker_oob(c) (0) 761da177e4SLinus Torvalds #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) 771da177e4SLinus Torvalds 78e631ddbaSFerenc Havasi #define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf) 79a6c22850SBrian Norris #define jffs2_flash_read(c, ofs, len, retlen, buf) (mtd_read((c)->mtd, ofs, len, retlen, buf)) 80733802d9SArtem B. Bityutskiy #define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; }) 81733802d9SArtem B. Bityutskiy #define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; }) 821da177e4SLinus Torvalds #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1) 831da177e4SLinus Torvalds #define jffs2_nand_flash_setup(c) (0) 841da177e4SLinus Torvalds #define jffs2_nand_flash_cleanup(c) do {} while(0) 851da177e4SLinus Torvalds #define jffs2_wbuf_dirty(c) (0) 861da177e4SLinus Torvalds #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) 871da177e4SLinus Torvalds #define jffs2_wbuf_timeout NULL 881da177e4SLinus Torvalds #define jffs2_wbuf_process NULL 898f15fd55SAndrew Victor #define jffs2_dataflash(c) (0) 90751382ddSTodd Poynor #define jffs2_dataflash_setup(c) (0) 91751382ddSTodd Poynor #define jffs2_dataflash_cleanup(c) do {} while (0) 929bfeb691SDavid Woodhouse #define jffs2_nor_wbuf_flash(c) (0) 9359da721aSNicolas Pitre #define jffs2_nor_wbuf_flash_setup(c) (0) 9459da721aSNicolas Pitre #define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0) 950029da3bSArtem Bityutskiy #define jffs2_ubivol(c) (0) 960029da3bSArtem Bityutskiy #define jffs2_ubivol_setup(c) (0) 970029da3bSArtem Bityutskiy #define jffs2_ubivol_cleanup(c) do {} while (0) 988bdc81c5SArtem Bityutskiy #define jffs2_dirty_trigger(c) do {} while (0) 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds #else /* NAND and/or ECC'd NOR support present */ 1011da177e4SLinus Torvalds 1028cd79216SArtem B. Bityuckiy #define jffs2_is_writebuffered(c) (c->wbuf != NULL) 103e631ddbaSFerenc Havasi 104e631ddbaSFerenc Havasi #ifdef CONFIG_JFFS2_SUMMARY 105e631ddbaSFerenc Havasi #define jffs2_can_mark_obsolete(c) (0) 106e631ddbaSFerenc Havasi #else 1075fa43394SJoern Engel #define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE)) 108e631ddbaSFerenc Havasi #endif 109e631ddbaSFerenc Havasi 1101da177e4SLinus Torvalds #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds /* wbuf.c */ 1151da177e4SLinus Torvalds 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); 1161da177e4SLinus Torvalds int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); 1171da177e4SLinus Torvalds int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); 1181da177e4SLinus Torvalds int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); 1191da177e4SLinus Torvalds int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 1201da177e4SLinus Torvalds int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); 1211da177e4SLinus Torvalds int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); 1221da177e4SLinus Torvalds void jffs2_wbuf_timeout(unsigned long data); 1231da177e4SLinus Torvalds void jffs2_wbuf_process(void *data); 1241da177e4SLinus Torvalds int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); 1251da177e4SLinus Torvalds int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); 1261da177e4SLinus Torvalds int jffs2_nand_flash_setup(struct jffs2_sb_info *c); 1271da177e4SLinus Torvalds void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); 1282f82ce1eSAndrew Victor 1298f15fd55SAndrew Victor #define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH) 1308f15fd55SAndrew Victor int jffs2_dataflash_setup(struct jffs2_sb_info *c); 1318f15fd55SAndrew Victor void jffs2_dataflash_cleanup(struct jffs2_sb_info *c); 1320029da3bSArtem Bityutskiy #define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME) 1330029da3bSArtem Bityutskiy int jffs2_ubivol_setup(struct jffs2_sb_info *c); 1340029da3bSArtem Bityutskiy void jffs2_ubivol_cleanup(struct jffs2_sb_info *c); 1352f82ce1eSAndrew Victor 1365fa43394SJoern Engel #define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE)) 13759da721aSNicolas Pitre int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c); 13859da721aSNicolas Pitre void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c); 1398bdc81c5SArtem Bityutskiy void jffs2_dirty_trigger(struct jffs2_sb_info *c); 14059da721aSNicolas Pitre 1412f82ce1eSAndrew Victor #endif /* WRITEBUFFER */ 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds /* background.c */ 1441da177e4SLinus Torvalds int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); 1451da177e4SLinus Torvalds void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); 1461da177e4SLinus Torvalds void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds /* dir.c */ 1494b6f5d20SArjan van de Ven extern const struct file_operations jffs2_dir_operations; 15092e1d5beSArjan van de Ven extern const struct inode_operations jffs2_dir_inode_operations; 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds /* file.c */ 1534b6f5d20SArjan van de Ven extern const struct file_operations jffs2_file_operations; 15492e1d5beSArjan van de Ven extern const struct inode_operations jffs2_file_inode_operations; 155f5e54d6eSChristoph Hellwig extern const struct address_space_operations jffs2_file_address_operations; 15602c24a82SJosef Bacik int jffs2_fsync(struct file *, loff_t, loff_t, int); 1571da177e4SLinus Torvalds int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg); 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds /* ioctl.c */ 1600533400bSStoyan Gaydarov long jffs2_ioctl(struct file *, unsigned int, unsigned long); 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds /* symlink.c */ 16392e1d5beSArjan van de Ven extern const struct inode_operations jffs2_symlink_inode_operations; 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds /* fs.c */ 1661da177e4SLinus Torvalds int jffs2_setattr (struct dentry *, struct iattr *); 1679ed437c5SDavid Woodhouse int jffs2_do_setattr (struct inode *, struct iattr *); 1685451f79fSDavid Howells struct inode *jffs2_iget(struct super_block *, unsigned long); 169b57922d9SAl Viro void jffs2_evict_inode (struct inode *); 170aa385729SChristoph Hellwig void jffs2_dirty_inode(struct inode *inode, int flags); 171d3fb6120SAl Viro struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode, 172cfc8dc6fSKaiGai Kohei struct jffs2_raw_inode *ri); 173726c3342SDavid Howells int jffs2_statfs (struct dentry *, struct kstatfs *); 17492abc475SAndres Salomon int jffs2_do_remount_fs(struct super_block *, int *, char *); 1751da177e4SLinus Torvalds int jffs2_do_fill_super(struct super_block *sb, void *data, int silent); 1761da177e4SLinus Torvalds void jffs2_gc_release_inode(struct jffs2_sb_info *c, 1771da177e4SLinus Torvalds struct jffs2_inode_info *f); 1781da177e4SLinus Torvalds struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, 1791b690b48SDavid Woodhouse int inum, int unlinked); 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, 1821da177e4SLinus Torvalds struct jffs2_inode_info *f, 1831da177e4SLinus Torvalds unsigned long offset, 1841da177e4SLinus Torvalds unsigned long *priv); 1851da177e4SLinus Torvalds void jffs2_gc_release_page(struct jffs2_sb_info *c, 1861da177e4SLinus Torvalds unsigned char *pg, 1871da177e4SLinus Torvalds unsigned long *priv); 1881da177e4SLinus Torvalds void jffs2_flash_cleanup(struct jffs2_sb_info *c); 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds /* writev.c */ 1921da177e4SLinus Torvalds int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, 1931da177e4SLinus Torvalds unsigned long count, loff_t to, size_t *retlen); 194e631ddbaSFerenc Havasi int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, 195e631ddbaSFerenc Havasi size_t *retlen, const u_char *buf); 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds #endif /* __JFFS2_OS_LINUX_H__ */ 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds 200