intrep.h
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上传日期:2013-04-10
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- /*
- * JFFS -- Journaling Flash File System, Linux implementation.
- *
- * Copyright (C) 1999, 2000 Axis Communications AB.
- *
- * Created by Finn Hakansson <finn@axis.com>.
- *
- * This is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * $Id: intrep.h,v 1.14 2001/09/23 23:28:37 dwmw2 Exp $
- *
- */
- #ifndef __LINUX_JFFS_INTREP_H__
- #define __LINUX_JFFS_INTREP_H__
- #include "jffs_fm.h"
- struct jffs_node *jffs_alloc_node(void);
- void jffs_free_node(struct jffs_node *n);
- int jffs_get_node_inuse(void);
- long jffs_get_file_count(void);
- __u32 jffs_checksum(const void *data, int size);
- void jffs_cleanup_control(struct jffs_control *c);
- int jffs_build_fs(struct super_block *sb);
- int jffs_insert_node(struct jffs_control *c, struct jffs_file *f,
- const struct jffs_raw_inode *raw_inode,
- const char *name, struct jffs_node *node);
- struct jffs_file *jffs_find_file(struct jffs_control *c, __u32 ino);
- struct jffs_file *jffs_find_child(struct jffs_file *dir, const char *name, int len);
- void jffs_free_node(struct jffs_node *node);
- int jffs_foreach_file(struct jffs_control *c, int (*func)(struct jffs_file *));
- int jffs_free_node_list(struct jffs_file *f);
- int jffs_free_file(struct jffs_file *f);
- int jffs_possibly_delete_file(struct jffs_file *f);
- int jffs_build_file(struct jffs_file *f);
- int jffs_insert_file_into_hash(struct jffs_file *f);
- int jffs_insert_file_into_tree(struct jffs_file *f);
- int jffs_unlink_file_from_hash(struct jffs_file *f);
- int jffs_unlink_file_from_tree(struct jffs_file *f);
- int jffs_remove_redundant_nodes(struct jffs_file *f);
- int jffs_file_count(struct jffs_file *f);
- int jffs_write_node(struct jffs_control *c, struct jffs_node *node,
- struct jffs_raw_inode *raw_inode,
- const char *name, const unsigned char *buf,
- int recoverable, struct jffs_file *f);
- int jffs_read_data(struct jffs_file *f, unsigned char *buf, __u32 read_offset, __u32 size);
- /* Garbage collection stuff. */
- int jffs_garbage_collect_thread(void *c);
- void jffs_garbage_collect_trigger(struct jffs_control *c);
- int jffs_garbage_collect_now(struct jffs_control *c);
- /* Is there enough space on the flash? */
- static inline int JFFS_ENOUGH_SPACE(struct jffs_control *c, __u32 space)
- {
- struct jffs_fmcontrol *fmc = c->fmc;
- while (1) {
- if ((fmc->flash_size - (fmc->used_size + fmc->dirty_size))
- >= fmc->min_free_size + space) {
- return 1;
- }
- if (fmc->dirty_size < fmc->sector_size)
- return 0;
- if (jffs_garbage_collect_now(c)) {
- D1(printk("JFFS_ENOUGH_SPACE: jffs_garbage_collect_now() failed.n"));
- return 0;
- }
- }
- }
- /* For debugging purposes. */
- void jffs_print_node(struct jffs_node *n);
- void jffs_print_raw_inode(struct jffs_raw_inode *raw_inode);
- int jffs_print_file(struct jffs_file *f);
- void jffs_print_hash_table(struct jffs_control *c);
- void jffs_print_tree(struct jffs_file *first_file, int indent);
- struct buffer_head *jffs_get_write_buffer(kdev_t dev, int block);
- void jffs_put_write_buffer(struct buffer_head *bh);
- #endif /* __LINUX_JFFS_INTREP_H__ */