ramfsvar.h

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/*
** ramfsvar.h for lseos in lseos-srv/fs/ramfs
** 
** Copyright(c)2004 Vianney Rancurel
** Login   <vianney@epita.fr>
** 
** Started on  Tue Feb 17 17:14:41 2004 Vianney Rancurel
** Last update Mon Dec  6 11:54:46 2004 Vianney Rancurel
*/
#ifndef __RAMFSVAR_H__
#define __RAMFSVAR_H__  1
#include <libc.h>

typedef struct          s_ramfsstat
{
  int                   nwrites;
  int                   nreads;
}                       t_ramfsstat;

struct s_file;
LIST_HEAD(s_file_list, s_file);
typedef struct s_file_list      t_file_list;

typedef struct          s_file
{
  LIST_ENTRY(s_file)    list;

  char                  *name;
  struct s_ramfs_entry  *entry;
}                       t_file;

typedef struct          s_ramfs_entry
{
  u_int                 refcnt;

  t_file_list           file_list;      
  uid_t                 uid;
  gid_t                 gid;
  size_t                size;
  int                   flags;
  mode_t                mode;

  char                  *buf;
 }                      t_ramfs_entry;

typedef struct          s_ramfs
{
  u_int32_t             avail:1;

#define MAXHOLDER       10
  pid_t                 holders[MAXHOLDER];
  uid_t                 uid;
  
  t_ramfs_entry         *entry;
  t_file                *cur;           
  off_t                 off;            
  t_ramfsstat           stat;
}                       t_ramfs;

typedef struct          s_ramfs_info
{
  t_ramfs_entry         root_entry;
  pid_t                 notify_pid;

  __cpu_simple_lock_t   lock;
}                       t_ramfs_info;

typedef enum
  {
    RAMFS_TOO_MANY_HOLDERS = 100,
    RAMFS_HOLDER_DOESNT_EXIST,
  } t_ramfs_suberrno_codes;

#endif

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