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Diffstat (limited to 'fs/jffs2/os-linux.h')
| -rw-r--r-- | fs/jffs2/os-linux.h | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h new file mode 100644 index 000000000000..03b0acc37b73 --- /dev/null +++ b/fs/jffs2/os-linux.h @@ -0,0 +1,217 @@ +/* + * JFFS2 -- Journalling Flash File System, Version 2. + * + * Copyright (C) 2002-2003 Red Hat, Inc. + * + * Created by David Woodhouse <dwmw2@infradead.org> + * + * 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 <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 + +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__ */ + + |