198 lines
7.4 KiB
C
198 lines
7.4 KiB
C
/*
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* JFFS2 -- Journalling Flash File System, Version 2.
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*
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* Copyright © 2001-2007 Red Hat, Inc.
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*
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* Created by David Woodhouse <dwmw2@infradead.org>
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*
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* For licensing information, see the file 'LICENCE' in this directory.
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*
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*/
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#ifndef __JFFS2_OS_LINUX_H__
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#define __JFFS2_OS_LINUX_H__
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/* JFFS2 uses Linux mode bits natively -- no need for conversion */
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#define os_to_jffs2_mode(x) (x)
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#define jffs2_to_os_mode(x) (x)
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struct kstatfs;
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struct kvec;
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#define JFFS2_INODE_INFO(i) (container_of(i, struct jffs2_inode_info, vfs_inode))
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#define OFNI_EDONI_2SFFJ(f) (&(f)->vfs_inode)
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#define JFFS2_SB_INFO(sb) (sb->s_fs_info)
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#define OFNI_BS_2SFFJ(c) ((struct super_block *)c->os_priv)
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#define JFFS2_F_I_SIZE(f) (OFNI_EDONI_2SFFJ(f)->i_size)
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#define JFFS2_F_I_MODE(f) (OFNI_EDONI_2SFFJ(f)->i_mode)
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#define JFFS2_F_I_UID(f) (i_uid_read(OFNI_EDONI_2SFFJ(f)))
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#define JFFS2_F_I_GID(f) (i_gid_read(OFNI_EDONI_2SFFJ(f)))
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#define JFFS2_F_I_RDEV(f) (OFNI_EDONI_2SFFJ(f)->i_rdev)
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#define JFFS2_CLAMP_TIME(t) ((uint32_t)clamp_t(time64_t, (t), 0, U32_MAX))
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#define ITIME(sec) ((struct timespec64){sec, 0})
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#define JFFS2_NOW() JFFS2_CLAMP_TIME(ktime_get_real_seconds())
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#define I_SEC(tv) JFFS2_CLAMP_TIME((tv).tv_sec)
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#define JFFS2_F_I_CTIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_ctime)
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#define JFFS2_F_I_MTIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_mtime)
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#define JFFS2_F_I_ATIME(f) I_SEC(OFNI_EDONI_2SFFJ(f)->i_atime)
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#define sleep_on_spinunlock(wq, s) \
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do { \
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DECLARE_WAITQUEUE(__wait, current); \
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add_wait_queue((wq), &__wait); \
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set_current_state(TASK_UNINTERRUPTIBLE); \
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spin_unlock(s); \
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schedule(); \
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remove_wait_queue((wq), &__wait); \
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} while(0)
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static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
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{
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f->highest_version = 0;
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f->fragtree = RB_ROOT;
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f->metadata = NULL;
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f->dents = NULL;
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f->target = NULL;
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f->flags = 0;
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f->usercompr = 0;
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}
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#define jffs2_is_readonly(c) (OFNI_BS_2SFFJ(c)->s_flags & SB_RDONLY)
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#define SECTOR_ADDR(x) ( (((unsigned long)(x) / c->sector_size) * c->sector_size) )
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#ifndef CONFIG_JFFS2_FS_WRITEBUFFER
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#ifdef CONFIG_JFFS2_SUMMARY
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#define jffs2_can_mark_obsolete(c) (0)
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#else
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#define jffs2_can_mark_obsolete(c) (1)
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#endif
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#define jffs2_is_writebuffered(c) (0)
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#define jffs2_cleanmarker_oob(c) (0)
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#define jffs2_write_nand_cleanmarker(c,jeb) (-EIO)
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#define jffs2_flash_write(c, ofs, len, retlen, buf) jffs2_flash_direct_write(c, ofs, len, retlen, buf)
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#define jffs2_flash_read(c, ofs, len, retlen, buf) (mtd_read((c)->mtd, ofs, len, retlen, buf))
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#define jffs2_flush_wbuf_pad(c) ({ do{} while(0); (void)(c), 0; })
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#define jffs2_flush_wbuf_gc(c, i) ({ do{} while(0); (void)(c), (void) i, 0; })
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#define jffs2_write_nand_badblock(c,jeb,bad_offset) (1)
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#define jffs2_nand_flash_setup(c) (0)
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#define jffs2_nand_flash_cleanup(c) do {} while(0)
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#define jffs2_wbuf_dirty(c) (0)
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#define jffs2_flash_writev(a,b,c,d,e,f) jffs2_flash_direct_writev(a,b,c,d,e)
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#define jffs2_wbuf_timeout NULL
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#define jffs2_wbuf_process NULL
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#define jffs2_dataflash(c) (0)
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#define jffs2_dataflash_setup(c) (0)
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#define jffs2_dataflash_cleanup(c) do {} while (0)
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#define jffs2_nor_wbuf_flash(c) (0)
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#define jffs2_nor_wbuf_flash_setup(c) (0)
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#define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0)
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#define jffs2_ubivol(c) (0)
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#define jffs2_ubivol_setup(c) (0)
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#define jffs2_ubivol_cleanup(c) do {} while (0)
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#define jffs2_dirty_trigger(c) do {} while (0)
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#else /* NAND and/or ECC'd NOR support present */
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#define jffs2_is_writebuffered(c) (c->wbuf != NULL)
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#ifdef CONFIG_JFFS2_SUMMARY
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#define jffs2_can_mark_obsolete(c) (0)
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#else
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#define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE))
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#endif
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#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
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#define jffs2_wbuf_dirty(c) (!!(c)->wbuf_len)
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/* wbuf.c */
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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);
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int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, const u_char *buf);
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int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *retlen, u_char *buf);
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int jffs2_check_oob_empty(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,int mode);
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int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
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int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
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int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t bad_offset);
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void jffs2_wbuf_timeout(unsigned long data);
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void jffs2_wbuf_process(void *data);
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int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
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int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
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int jffs2_nand_flash_setup(struct jffs2_sb_info *c);
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void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c);
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#define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH)
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int jffs2_dataflash_setup(struct jffs2_sb_info *c);
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void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
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#define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME)
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int jffs2_ubivol_setup(struct jffs2_sb_info *c);
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void jffs2_ubivol_cleanup(struct jffs2_sb_info *c);
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#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE))
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int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
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void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);
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void jffs2_dirty_trigger(struct jffs2_sb_info *c);
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#endif /* WRITEBUFFER */
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/* background.c */
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int jffs2_start_garbage_collect_thread(struct jffs2_sb_info *c);
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void jffs2_stop_garbage_collect_thread(struct jffs2_sb_info *c);
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void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
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/* dir.c */
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extern const struct file_operations jffs2_dir_operations;
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extern const struct inode_operations jffs2_dir_inode_operations;
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/* file.c */
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extern const struct file_operations jffs2_file_operations;
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extern const struct inode_operations jffs2_file_inode_operations;
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extern const struct address_space_operations jffs2_file_address_operations;
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int jffs2_fsync(struct file *, loff_t, loff_t, int);
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int __jffs2_read_folio(struct file *file, struct folio *folio);
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/* ioctl.c */
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long jffs2_ioctl(struct file *, unsigned int, unsigned long);
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/* symlink.c */
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extern const struct inode_operations jffs2_symlink_inode_operations;
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/* fs.c */
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int jffs2_setattr (struct user_namespace *, struct dentry *, struct iattr *);
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int jffs2_do_setattr (struct inode *, struct iattr *);
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struct inode *jffs2_iget(struct super_block *, unsigned long);
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void jffs2_evict_inode (struct inode *);
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void jffs2_dirty_inode(struct inode *inode, int flags);
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struct inode *jffs2_new_inode (struct inode *dir_i, umode_t mode,
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struct jffs2_raw_inode *ri);
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int jffs2_statfs (struct dentry *, struct kstatfs *);
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int jffs2_do_remount_fs(struct super_block *sb, struct fs_context *fc);
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int jffs2_do_fill_super(struct super_block *sb, struct fs_context *fc);
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void jffs2_gc_release_inode(struct jffs2_sb_info *c,
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struct jffs2_inode_info *f);
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struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c,
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int inum, int unlinked);
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unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
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struct jffs2_inode_info *f,
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unsigned long offset,
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unsigned long *priv);
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void jffs2_flash_cleanup(struct jffs2_sb_info *c);
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/* writev.c */
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int jffs2_flash_direct_writev(struct jffs2_sb_info *c, const struct kvec *vecs,
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unsigned long count, loff_t to, size_t *retlen);
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int jffs2_flash_direct_write(struct jffs2_sb_info *c, loff_t ofs, size_t len,
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size_t *retlen, const u_char *buf);
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#endif /* __JFFS2_OS_LINUX_H__ */
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