/* * JFFS2 -- Journalling Flash File System, Version 2. * * Copyright (C) 2002-2003 Red Hat, Inc. * * Created by David Woodhouse * * For licensing information, see the file 'LICENCE' in this directory. * * $Id: os-linux.h,v 1.51 2004/11/16 20:36:11 dwmw2 Exp $ * */ #ifndef __JFFS2_OS_LINUX_H__ #define __JFFS2_OS_LINUX_H__ #include /* JFFS2 uses Linux mode bits natively -- no need for conversion */ #define os_to_jffs2_mode(x) (x) #define jffs2_to_os_mode(x) (x) #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,73) #define kstatfs statfs #endif struct kstatfs; struct kvec; #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2) #define JFFS2_INODE_INFO(i) (list_entry(i, struct jffs2_inode_info, vfs_inode)) #define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode) #define JFFS2_SB_INFO(sb) (sb->s_fs_info) #define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv) #elif defined(JFFS2_OUT_OF_KERNEL) #define JFFS2_INODE_INFO(i) ((struct jffs2_inode_info *) &(i)->u) #define OFNI_EDONI_2SFFJ(f) ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) ) #define JFFS2_SB_INFO(sb) ((struct jffs2_sb_info *) &(sb)->u) #define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) ) #else #define JFFS2_INODE_INFO(i) (&i->u.jffs2_i) #define OFNI_EDONI_2SFFJ(f) ((struct inode *) ( ((char *)f) - ((char *)(&((struct inode *)NULL)->u)) ) ) #define JFFS2_SB_INFO(sb) (&sb->u.jffs2_sb) #define OFNI_BS_2SFFJ(c) ((struct super_block *) ( ((char *)c) - ((char *)(&((struct super_block *)NULL)->u)) ) ) #endif #define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size) #define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode) #define JFFS2_F_I_UID(f) (OFNI_EDONI_2SFFJ(f)->i_uid) #define JFFS2_F_I_GID(f) (OFNI_EDONI_2SFFJ(f)->i_gid) #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,1) #define JFFS2_F_I_RDEV_MIN(f) (iminor(OFNI_EDONI_2SFFJ(f))) #define JFFS2_F_I_RDEV_MAJ(f) (imajor(OFNI_EDONI_2SFFJ(f))) #else #define JFFS2_F_I_RDEV_MIN(f) (MINOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev))) #define JFFS2_F_I_RDEV_MAJ(f) (MAJOR(to_kdev_t(OFNI_EDONI_2SFFJ(f)->i_rdev))) #endif /* Urgh. The things we do to keep the 2.4 build working */ #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,47) #define ITIME(sec) ((struct timespec){sec, 0}) #define I_SEC(tv) ((tv).tv_sec) #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime.tv_sec) #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime.tv_sec) #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime.tv_sec) #else #define ITIME(x) (x) #define I_SEC(x) (x) #define JFFS2_F_I_CTIME(f) (OFNI_EDONI_2SFFJ(f)->i_ctime) #define JFFS2_F_I_MTIME(f) (OFNI_EDONI_2SFFJ(f)->i_mtime) #define JFFS2_F_I_ATIME(f) (OFNI_EDONI_2SFFJ(f)->i_atime) #endif #define sleep_on_spinunlock(wq, s) \ do { \ DECLARE_WAITQUEUE(__wait, current); \ add_wait_queue((wq), &__wait); \ set_current_state(TASK_UNINTERRUPTIBLE); \ spin_unlock(s); \ schedule(); \ remove_wait_queue((wq), &__wait); \ } while(0) static inline void jffs2_init_inode_info(struct jffs2_inode_info *f) { #if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,2) f->highest_version = 0; f->fragtree = RB_ROOT; f->metadata = NULL; f->dents = NULL; f->flags = 0; f->usercompr = 0; #else memset(f, 0, sizeof(*f)); init_MUTEX_LOCKED(&f->sem); #endif } #define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & MS_RDONLY) #if (!defined CONFIG_JFFS2_FS_NAND && !defined CONFIG_JFFS2_FS_NOR_ECC) #define jffs2_can_mark_obsolete(c) (1) #define jffs2_cleanmarker_oob(c) (0) #define jffs2_write_nand_cleanmarker(c,jeb) (-EIO) #define jffs2_flash_write(c, ofs, len, retlen, buf) ((c)->mtd->write((c)->mtd, ofs, len, retlen, buf)) #define jffs2_flash_read(c, ofs, len, retlen, buf) ((c)->mtd->read((c)->mtd, ofs, len, retlen, buf)) #define jffs2_flush_wbuf_pad(c) ({ (void)(c), 0; }) #define jffs2_flush_wbuf_gc(c, i) ({ (void)(c), (void) i, 0; }) #define jffs2_write_nand_badblock(c,jeb,bad_offset) (1) #define jffs2_nand_flash_setup(c) (0) #define jffs2_nand_flash_cleanup(c) do {} while(0) #define jffs2_wbuf_dirty(c) (0) #define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e) #define jffs2_wbuf_timeout NULL #define jffs2_wbuf_process NULL #define jffs2_nor_ecc(c) (0) #define jffs2_nor_ecc_flash_setup(c) (0) #define jffs2_nor_ecc_flash_cleanup(c) do {} while (0) #else /* NAND and/or ECC'd NOR support present */ #define jffs2_can_mark_obsolete(c) ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & MTD_ECC)) || c->mtd->type == MTD_RAM) #define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH) #define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf)) #define jffs2_flash_read_oob(c, ofs, len, retlen, buf) ((c)->mtd->read_oob((c)->mtd, ofs, len, retlen, buf)) #define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len) /* wbuf.c */ 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); int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf); int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf); int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode); int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset); void jffs2_wbuf_timeout(unsigned long data); void jffs2_wbuf_process(void *data); int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); int jffs2_nand_flash_setup(struct jffs2_sb_info *c); void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); #ifdef CONFIG_JFFS2_FS_NOR_ECC #define jffs2_nor_ecc(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_ECC)) int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c); void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c); #else #define jffs2_nor_ecc(c) (0) #define jffs2_nor_ecc_flash_setup(c) (0) #define jffs2_nor_ecc_flash_cleanup(c) do {} while (0) #endif /* NOR ECC */ #endif /* NAND */ /* erase.c */ static inline void jffs2_erase_pending_trigger(struct jffs2_sb_info *c) { OFNI_BS_2SFFJ(c)->s_dirt = 1; } /* background.c */ int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c); void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c); void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c); /* dir.c */ extern struct file_operations jffs2_dir_operations; extern struct inode_operations jffs2_dir_inode_operations; /* file.c */ extern struct file_operations jffs2_file_operations; extern struct inode_operations jffs2_file_inode_operations; extern struct address_space_operations jffs2_file_address_operations; int jffs2_fsync(struct file *, struct dentry *, int); int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg); /* ioctl.c */ int jffs2_ioctl(struct inode *, struct file *, unsigned int, unsigned long); /* symlink.c */ extern struct inode_operations jffs2_symlink_inode_operations; /* fs.c */ int jffs2_setattr (struct dentry *, struct iattr *); void jffs2_read_inode (struct inode *); void jffs2_clear_inode (struct inode *); void jffs2_dirty_inode(struct inode *inode); struct inode *jffs2_new_inode (struct inode *dir_i, int mode, struct jffs2_raw_inode *ri); int jffs2_statfs (struct super_block *, struct kstatfs *); void jffs2_write_super (struct super_block *); int jffs2_remount_fs (struct super_block *, int *, char *); int jffs2_do_fill_super(struct super_block *sb, void *data, int silent); void jffs2_gc_release_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f); struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, int inum, int nlink); unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, struct jffs2_inode_info *f, unsigned long offset, unsigned long *priv); void jffs2_gc_release_page(struct jffs2_sb_info *c, unsigned char *pg, unsigned long *priv); void jffs2_flash_cleanup(struct jffs2_sb_info *c); /* writev.c */ int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen); #endif /* __JFFS2_OS_LINUX_H__ */