| /* |
| * JFFS2 -- Journalling Flash File System, Version 2. |
| * |
| * Copyright (C) 2002-2003 Red Hat, Inc. |
| * |
| * Created by David Woodhouse <dwmw2@redhat.com> |
| * |
| * For licensing information, see the file 'LICENCE' in this directory. |
| * |
| * $Id: os-linux.h,v 1.37 2003/10/11 11:47:23 dwmw2 Exp $ |
| * |
| */ |
| |
| #ifndef __JFFS2_OS_LINUX_H__ |
| #define __JFFS2_OS_LINUX_H__ |
| #include <linux/version.h> |
| |
| /* 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 |
| |
| #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 |
| |
| /* Hmmm. P'raps generic code should only ever see versions of signal |
| functions which do the locking automatically? */ |
| #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,40) && !defined(__rh_config_h__) |
| #define current_sig_lock current->sigmask_lock |
| #else |
| #define current_sig_lock current->sighand->siglock |
| #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) |
| |
| #ifndef CONFIG_JFFS2_FS_NAND |
| #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_nand_read_failcnt(c,jeb) do { ; } while(0) |
| #define jffs2_write_nand_badblock(c,jeb) do { ; } while(0) |
| #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 |
| |
| #else /* NAND support present */ |
| |
| #define jffs2_can_mark_obsolete(c) (c->mtd->type == MTD_NORFLASH || 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) |
| struct kstatfs; |
| |
| /* wbuf.c */ |
| int jffs2_flash_writev(struct jffs2_sb_info *c, const struct iovec *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); |
| void jffs2_wbuf_timeout(unsigned long data); |
| void jffs2_wbuf_process(void *data); |
| int jffs2_nand_flash_setup(struct jffs2_sb_info *c); |
| void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); |
| #endif /* NAND */ |
| |
| /* 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_nolock (struct inode *inode, struct page *pg); |
| int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg); |
| int jffs2_readpage (struct file *, struct page *); |
| int jffs2_prepare_write (struct file *, struct page *, unsigned, unsigned); |
| int jffs2_commit_write (struct file *, struct page *, unsigned, unsigned); |
| |
| /* 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); |
| |
| /* writev.c */ |
| int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct iovec *vecs, |
| unsigned long count, loff_t to, size_t *retlen); |
| |
| /* super.c */ |
| |
| |
| #endif /* __JFFS2_OS_LINUX_H__ */ |
| |
| |