vfs.h

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/*
 * Copyright (c) 2009 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT 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 TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef LIBC_IPC_VFS_H_
#define LIBC_IPC_VFS_H_

#include <ipc/common.h>
#include <sys/types.h>
#include <bool.h>

#define FS_NAME_MAXLEN  20
#define MAX_PATH_LEN    (64 * 1024)
#define PLB_SIZE        (2 * MAX_PATH_LEN)

/* Basic types. */
typedef int16_t fs_handle_t;
typedef uint32_t fs_index_t;

typedef struct {
        char name[FS_NAME_MAXLEN + 1];
        bool concurrent_read_write;
        bool write_retains_size;
} vfs_info_t;

typedef enum {
        VFS_IN_OPEN = IPC_FIRST_USER_METHOD,
        VFS_IN_OPEN_NODE,
        VFS_IN_READ,
        VFS_IN_WRITE,
        VFS_IN_SEEK,
        VFS_IN_TRUNCATE,
        VFS_IN_FSTAT,
        VFS_IN_CLOSE,
        VFS_IN_MOUNT,
        VFS_IN_UNMOUNT,
        VFS_IN_SYNC,
        VFS_IN_REGISTER,
        VFS_IN_MKDIR,
        VFS_IN_UNLINK,
        VFS_IN_RENAME,
        VFS_IN_STAT,
        VFS_IN_DUP
} vfs_in_request_t;

typedef enum {
        VFS_OUT_OPEN_NODE = IPC_FIRST_USER_METHOD,
        VFS_OUT_READ,
        VFS_OUT_WRITE,
        VFS_OUT_TRUNCATE,
        VFS_OUT_CLOSE,
        VFS_OUT_MOUNT,
        VFS_OUT_MOUNTED,
        VFS_OUT_UNMOUNT,
        VFS_OUT_UNMOUNTED,
        VFS_OUT_SYNC,
        VFS_OUT_STAT,
        VFS_OUT_LOOKUP,
        VFS_OUT_DESTROY,
        VFS_OUT_LAST
} vfs_out_request_t;

/*
 * Lookup flags.
 */

#define L_NONE                  0

#define L_FILE                  1

#define L_DIRECTORY             2

#define L_ROOT                  4

#define L_MP                    8


#define L_EXCLUSIVE             16

#define L_CREATE                32

#define L_LINK                  64

#define L_UNLINK                128

#define L_OPEN                  256

#endif

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