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/*
Copyright (C) 1997, 1999 Free Software Foundation, Inc.
Written by Thomas Bushnell, n/BSG.
This file is part of the GNU Hurd.
The GNU Hurd 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, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include <sys/types.h>
#include <sys/mman.h>
#include <hurd/diskfs.h>
#include <hurd/diskfs-pager.h>
#include <hurd/store.h>
#include "rr.h"
/* There is no such thing as an inode in this format, all such informatio n
being recorded in the directory entry. So we report inode numbers as
absolute offsets from DISK_IMAGE. */
struct disknode
{
struct dirrect *dr; /* Somewhere in disk_image. */
off_t file_start; /* In store->block_size units */
struct user_pager_info *fileinfo;
char *link_target; /* for S_ISLNK */
size_t translen;
char *translator;
};
struct user_pager_info
{
struct node *np;
enum pager_type
{
DISK,
FILE_DATA,
} type;
struct pager *p;
};
struct lookup_context
{
/* The directory record. Points somewhere into the disk_image. */
struct dirrect *dr;
/* The results of an rrip_scan_lookup call for this node. */
struct rrip_lookup rr;
};
/* The physical media */
extern struct store *store;
extern char *host_name;
/* Name we are mounted on, with trailing slash */
extern char *mounted_on;
/* Mapped image of disk */
extern void *disk_image;
extern size_t disk_image_len;
/* Processed sblock info */
/* Block size of pointers etc. on disk (6.2.2). */
extern size_t logical_block_size;
/* Size of "logical sectors" (6.1.2). These are 2048 or the
largest power of two that will fit in a physical sector, whichever is
greater. I don't know how to fetch the physical sector size; so
we'll just use a constant. */
#define logical_sector_size 2048
/* Unprocessed superblock */
extern struct sblock *sblock;
void drop_pager_softrefs (struct node *);
void allow_pager_softrefs (struct node *);
void create_disk_pager (void);
/* Given RECORD and RR, calculate the cache id. */
error_t cache_id (struct dirrect *record, struct rrip_lookup *rr, ino_t *idp);
error_t calculate_file_start (struct dirrect *, off_t *, struct rrip_lookup *);
char *isodate_915 (char *, struct timespec *);
char *isodate_84261 (char *, struct timespec *);
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