/*****************************************************************************************
 Copyright (c) 2002-2004 The UbixOS Project
 All rights reserved.

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 permitted provided that the following conditions are met:

 Redistributions of source code must retain the above copyright notice, this list of
 conditions, the following disclaimer and the list of authors.  Redistributions in binary
 form must reproduce the above copyright notice, this list of conditions, the following
 disclaimer and the list of authors in the documentation and/or other materials provided
 with the distribution. Neither the name of the UbixOS Project nor the names of its
 contributors may be used to endorse or promote products derived from this software
 without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 $Id: vfs.h 79 2016-01-11 16:21:27Z reddawg $

 *****************************************************************************************/

#ifndef _VFS_VFS_H
#define _VFS_VFS_H

#include <sys/types.h>
#include <vfs/file.h>
#include <vfs/mount.h>
#include <sys/sysproto.h>
#include <sys/thread.h>
#include <net/net.h>
#include <ubixos/wait.h>

#define MAY_EXEC 1
#define MAY_WRITE 2
#define MAY_READ 4

#define MAX_OFILES 256

#define maxFd   32
#define fdAvail 1
#define fdOpen  2
#define fdRead  3
#define fdEof   4

#define fileRead    0x0001
#define fileWrite   0x0002
#define fileBinary  0x0004
#define fileAppend  0x0008

/*!
 \brief filesSystem Structure

 not sure if we should allow function to point to NULL
 */
struct fileSystem {
    struct fileSystem *prev;
    struct fileSystem *next;
    int (*vfsInitFS)(void *); /*!< pointer to inialization routine */
    int (*vfsRead)(void *, char *, long, long); /*!< pointer to read routine */
    int (*vfsWrite)(void *, char *, long, long); /*!< pointer to write routine */
    int (*vfsOpenFile)(void *, void *); /*!< pointer to openfile routine */
    int (*vfsUnlink)(char *, void *); /*!< pointer to unlink routine */
    int (*vfsMakeDir)(char *, void *); /*!< pointer to makedir routine */
    int (*vfsRemDir)(char *); /*!< pointer to remdir routine */
    int (*vfsSync)(void); /*!< pointer to sync routine */
    int vfsType; /*!< vfs type id */
};

struct inode_operations {
    struct file_operations * default_file_ops;
    int (*create)(struct inode *, const char *, int, int, struct inode **);
    int (*lookup)(struct inode *, const char *, int, struct inode **);
    int (*link)(struct inode *, struct inode *, const char *, int);
    int (*unlink)(struct inode *, const char *, int);
    int (*symlink)(struct inode *, const char *, int, const char *);
    int (*mkdir)(struct inode *, const char *, int, int);
    int (*rmdir)(struct inode *, const char *, int);
    int (*mknod)(struct inode *, const char *, int, int, int);
    int (*rename)(struct inode *, const char *, int, struct inode *, const char *, int);
    int (*readlink)(struct inode *, char *, int);
    int (*follow_link)(struct inode *, struct inode *, int, int, struct inode **);
    int (*bmap)(struct inode *, int);
    void (*truncate)(struct inode *);
    int (*permission)(struct inode *, int);
};

/* VFS Functions */
int vfs_init();
int vfsRegisterFS(struct fileSystem);
struct fileSystem *vfs_findFS(int);

#include <fs/pipe_fs.h>
#include <fs/msdos_fs.h>
#include <ufs/ufs.h>

struct super_operations {
    void (*read_inode)(struct inode *);
    int (*notify_change)(int flags, struct inode *);
    void (*write_inode)(struct inode *);
    void (*put_inode)(struct inode *);
    void (*put_super)(struct super_block *);
    void (*write_super)(struct super_block *);
    void (*statfs)(struct super_block *, struct statfs *);
    int (*remount_fs)(struct super_block *, int *, char *);
};

struct super_block {
    __dev_t s_dev;
    unsigned long s_blocksize;
    unsigned char s_blocksize_bits;
    unsigned char s_lock;
    unsigned char s_rd_only;
    unsigned char s_dirt;
    struct super_operations *s_op;
    unsigned long s_flags;
    unsigned long s_magic;
    unsigned long s_time;
    struct inode * s_covered;
    struct inode * s_mounted;
    struct wait_queue * s_wait;
    union {
        struct msdos_sb_info msdos_sb;
        struct fs ufs1_sb;
        struct fs ufs2_sb;
    } u;
};

struct inode {
    __dev_t i_dev;
    unsigned long i_ino;
    __mode_t i_mode;
    __nlink_t i_nlink;
    uid_t i_uid;
    gid_t i_gid;
    __dev_t i_rdev;
    off_t i_size;
    time_t i_atime;
    time_t i_mtime;
    time_t i_ctime;
    unsigned long i_blksize;
    unsigned long i_blocks;
    struct semaphore i_sem;
    struct inode_operations * i_op;
    struct super_block * i_sb;
    struct wait_queue * i_wait;
    struct file_lock * i_flock;
    struct vm_area_struct * i_mmap;
    struct inode * i_next, *i_prev;
    struct inode * i_hash_next, *i_hash_prev;
    struct inode * i_bound_to, *i_bound_by;
    struct inode * i_mount;
    struct socket * i_socket;
    unsigned short i_count;
    unsigned short i_flags;
    unsigned char i_lock;
    unsigned char i_dirt;
    unsigned char i_pipe;
    unsigned char i_seek;
    unsigned char i_update;
    union {
        struct pipe_inode_info pipe_i;
        struct msdos_inode_info msdos_i;
        struct ufs1_dinode ufs1_i;
        struct ufs2_dinode ufs2_i;
    } u;
};

#endif