198 lines
7.4 KiB
C
198 lines
7.4 KiB
C
/*
|
|
* JFFS2 -- Journalling Flash File System, Version 2.
|
|
*
|
|
* Copyright © 2001-2007 Red Hat, Inc.
|
|
*
|
|
* Created by David Woodhouse <dwmw2@infradead.org>
|
|
*
|
|
* For licensing information, see the file 'LICENCE' in this directory.
|
|
*
|
|
*/
|
|
|
|
#ifndef __JFFS2_OS_LINUX_H__
|
|
#define __JFFS2_OS_LINUX_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)
|
|
|
|
struct kstatfs;
|
|
struct kvec;
|
|
|
|
#define JFFS2_INODE_INFO(i) (container_of(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)
|
|
|
|
|
|
#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) (i_uid_read(OFNI_EDONI_2SFFJ(f)))
|
|
#define JFFS2_F_I_GID(f) (i_gid_read(OFNI_EDONI_2SFFJ(f)))
|
|
#define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev)
|
|
|
|
#define JFFS2_CLAMP_TIME(t) ((uint32_t)clamp_t(time64_t, (t), 0, U32_MAX))
|
|
#define ITIME(sec) ((struct timespec64){sec, 0})
|
|
#define JFFS2_NOW() JFFS2_CLAMP_TIME(ktime_get_real_seconds())
|
|
#define I_SEC(tv) JFFS2_CLAMP_TIME((tv).tv_sec)
|
|
#define JFFS2_F_I_CTIME(f) I_SEC(inode_get_ctime(OFNI_EDONI_2SFFJ(f)))
|
|
#define JFFS2_F_I_MTIME(f) I_SEC(inode_get_mtime(OFNI_EDONI_2SFFJ(f)))
|
|
#define JFFS2_F_I_ATIME(f) I_SEC(inode_get_atime(OFNI_EDONI_2SFFJ(f)))
|
|
#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)
|
|
{
|
|
f->highest_version = 0;
|
|
f->fragtree = RB_ROOT;
|
|
f->metadata = NULL;
|
|
f->dents = NULL;
|
|
f->target = NULL;
|
|
f->flags = 0;
|
|
f->usercompr = 0;
|
|
}
|
|
|
|
|
|
#define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & SB_RDONLY)
|
|
|
|
#define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) )
|
|
#ifndef CONFIG_JFFS2_FS_WRITEBUFFER
|
|
|
|
|
|
#ifdef CONFIG_JFFS2_SUMMARY
|
|
#define jffs2_can_mark_obsolete(c) (0)
|
|
#else
|
|
#define jffs2_can_mark_obsolete(c) (1)
|
|
#endif
|
|
|
|
#define jffs2_is_writebuffered(c) (0)
|
|
#define jffs2_cleanmarker_oob(c) (0)
|
|
#define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
|
|
|
|
#define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf)
|
|
#define jffs2_flash_read(c, ofs, len, retlen, buf) (mtd_read((c)->mtd, ofs, len, retlen, buf))
|
|
#define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; })
|
|
#define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (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_dataflash(c) (0)
|
|
#define jffs2_dataflash_setup(c) (0)
|
|
#define jffs2_dataflash_cleanup(c) do {} while (0)
|
|
#define jffs2_nor_wbuf_flash(c) (0)
|
|
#define jffs2_nor_wbuf_flash_setup(c) (0)
|
|
#define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0)
|
|
#define jffs2_ubivol(c) (0)
|
|
#define jffs2_ubivol_setup(c) (0)
|
|
#define jffs2_ubivol_cleanup(c) do {} while (0)
|
|
#define jffs2_dirty_trigger(c) do {} while (0)
|
|
|
|
#else /* NAND and/or ECC'd NOR support present */
|
|
|
|
#define jffs2_is_writebuffered(c) (c->wbuf != NULL)
|
|
|
|
#ifdef CONFIG_JFFS2_SUMMARY
|
|
#define jffs2_can_mark_obsolete(c) (0)
|
|
#else
|
|
#define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE))
|
|
#endif
|
|
|
|
#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
|
|
|
|
#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);
|
|
|
|
#define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
|
|
int jffs2_dataflash_setup(struct jffs2_sb_info *c);
|
|
void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
|
|
#define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME)
|
|
int jffs2_ubivol_setup(struct jffs2_sb_info *c);
|
|
void jffs2_ubivol_cleanup(struct jffs2_sb_info *c);
|
|
|
|
#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE))
|
|
int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
|
|
void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);
|
|
void jffs2_dirty_trigger(struct jffs2_sb_info *c);
|
|
|
|
#endif /* WRITEBUFFER */
|
|
|
|
/* 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 const struct file_operations jffs2_dir_operations;
|
|
extern const struct inode_operations jffs2_dir_inode_operations;
|
|
|
|
/* file.c */
|
|
extern const struct file_operations jffs2_file_operations;
|
|
extern const struct inode_operations jffs2_file_inode_operations;
|
|
extern const struct address_space_operations jffs2_file_address_operations;
|
|
int jffs2_fsync(struct file *, loff_t, loff_t, int);
|
|
int __jffs2_read_folio(struct file *file, struct folio *folio);
|
|
|
|
/* ioctl.c */
|
|
long jffs2_ioctl(struct file *, unsigned int, unsigned long);
|
|
|
|
/* symlink.c */
|
|
extern const struct inode_operations jffs2_symlink_inode_operations;
|
|
|
|
/* fs.c */
|
|
int jffs2_setattr (struct mnt_idmap *, struct dentry *, struct iattr *);
|
|
int jffs2_do_setattr (struct inode *, struct iattr *);
|
|
struct inode *jffs2_iget(struct super_block *, unsigned long);
|
|
void jffs2_evict_inode (struct inode *);
|
|
void jffs2_dirty_inode(struct inode *inode, int flags);
|
|
struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode,
|
|
struct jffs2_raw_inode *ri);
|
|
int jffs2_statfs (struct dentry *, struct kstatfs *);
|
|
int jffs2_do_remount_fs(struct super_block *sb, struct fs_context *fc);
|
|
int jffs2_do_fill_super(struct super_block *sb, struct fs_context *fc);
|
|
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 unlinked);
|
|
|
|
unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
|
|
struct jffs2_inode_info *f,
|
|
unsigned long offset,
|
|
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);
|
|
int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
|
|
size_t *retlen, const u_char *buf);
|
|
|
|
#endif /* __JFFS2_OS_LINUX_H__ */
|
|
|
|
|