Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/fs/jffs/intrep.h
Version:
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1 /* 2 * JFFS -- Journaling Flash File System, Linux implementation. 3 * 4 * Copyright (C) 1999, 2000 Axis Communications AB. 5 * 6 * Created by Finn Hakansson <finn@axis.com>. 7 * 8 * This is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * $Id: intrep.h,v 1.14 2001/09/23 23:28:37 dwmw2 Exp $ 14 * 15 */ 16 17 #ifndef __LINUX_JFFS_INTREP_H__ 18 #define __LINUX_JFFS_INTREP_H__ 19 #include "jffs_fm.h" 20 struct jffs_node *jffs_alloc_node(void); 21 void jffs_free_node(struct jffs_node *n); 22 int jffs_get_node_inuse(void); 23 long jffs_get_file_count(void); 24 25 __u32 jffs_checksum(const void *data, int size); 26 27 void jffs_cleanup_control(struct jffs_control *c); 28 int jffs_build_fs(struct super_block *sb); 29 30 int jffs_insert_node(struct jffs_control *c, struct jffs_file *f, 31 const struct jffs_raw_inode *raw_inode, 32 const char *name, struct jffs_node *node); 33 struct jffs_file *jffs_find_file(struct jffs_control *c, __u32 ino); 34 struct jffs_file *jffs_find_child(struct jffs_file *dir, const char *name, int len); 35 36 void jffs_free_node(struct jffs_node *node); 37 38 int jffs_foreach_file(struct jffs_control *c, int (*func)(struct jffs_file *)); 39 int jffs_free_node_list(struct jffs_file *f); 40 int jffs_free_file(struct jffs_file *f); 41 int jffs_possibly_delete_file(struct jffs_file *f); 42 int jffs_build_file(struct jffs_file *f); 43 int jffs_insert_file_into_hash(struct jffs_file *f); 44 int jffs_insert_file_into_tree(struct jffs_file *f); 45 int jffs_unlink_file_from_hash(struct jffs_file *f); 46 int jffs_unlink_file_from_tree(struct jffs_file *f); 47 int jffs_remove_redundant_nodes(struct jffs_file *f); 48 int jffs_file_count(struct jffs_file *f); 49 50 int jffs_write_node(struct jffs_control *c, struct jffs_node *node, 51 struct jffs_raw_inode *raw_inode, 52 const char *name, const unsigned char *buf, 53 int recoverable, struct jffs_file *f); 54 int jffs_read_data(struct jffs_file *f, unsigned char *buf, __u32 read_offset, __u32 size); 55 56 /* Garbage collection stuff. */ 57 int jffs_garbage_collect_thread(void *c); 58 void jffs_garbage_collect_trigger(struct jffs_control *c); 59 int jffs_garbage_collect_now(struct jffs_control *c); 60 61 /* Is there enough space on the flash? */ 62 static inline int JFFS_ENOUGH_SPACE(struct jffs_control *c, __u32 space) 63 { 64 struct jffs_fmcontrol *fmc = c->fmc; 65 66 while (1) { 67 if ((fmc->flash_size - (fmc->used_size + fmc->dirty_size)) 68 >= fmc->min_free_size + space) { 69 return 1; 70 } 71 if (fmc->dirty_size < fmc->sector_size) 72 return 0; 73 74 if (jffs_garbage_collect_now(c)) { 75 D1(printk("JFFS_ENOUGH_SPACE: jffs_garbage_collect_now() failed.\n")); 76 return 0; 77 } 78 } 79 } 80 81 /* For debugging purposes. */ 82 void jffs_print_node(struct jffs_node *n); 83 void jffs_print_raw_inode(struct jffs_raw_inode *raw_inode); 84 int jffs_print_file(struct jffs_file *f); 85 void jffs_print_hash_table(struct jffs_control *c); 86 void jffs_print_tree(struct jffs_file *first_file, int indent); 87 88 struct buffer_head *jffs_get_write_buffer(kdev_t dev, int block); 89 void jffs_put_write_buffer(struct buffer_head *bh); 90 91 #endif /* __LINUX_JFFS_INTREP_H__ */
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