Subversion Repositories HelenOS

Rev

Rev 2529 | Rev 2540 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2520 jermar 1 
/*
2 
 * Copyright (c) 2007 Jakub Jermar
3 
 * All rights reserved.
4 
 *
5 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
7 
 * are met:
8 
 *
9 
 * - Redistributions of source code must retain the above copyright
10 
 *   notice, this list of conditions and the following disclaimer.
11 
 * - Redistributions in binary form must reproduce the above copyright
12 
 *   notice, this list of conditions and the following disclaimer in the
13 
 *   documentation and/or other materials provided with the distribution.
14 
 * - The name of the author may not be used to endorse or promote products
15 
 *   derived from this software without specific prior written permission.
16 
 *
17 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
 */
28 
 
29 
/** @addtogroup fs
30 
 * @{
31 
 */
32 
 
33 
#ifndef VFS_VFS_H_
34 
#define VFS_VFS_H_
35 
 
2523 jermar 36 
#include <ipc/ipc.h>
2529 jermar 37 
#include <libadt/list.h>
2523 jermar 38 
 
2535 jermar 39 
#define dprintf(...)    printf(__VA_ARGS__)
40 
 
2523 jermar 41 
#define VFS_FIRST   FIRST_USER_METHOD
42 
 
2526 jermar 43 
#define IPC_METHOD_TO_VFS_OP(m) ((m) - VFS_FIRST)  
44 
 
2520 jermar 45 
typedef enum {
2523 jermar 46 
    VFS_REGISTER = VFS_FIRST,
2520 jermar 47 
    VFS_MOUNT,
48 
    VFS_UNMOUNT,
2527 jermar 49 
    VFS_LOOKUP,
2521 jermar 50 
    VFS_OPEN,
2523 jermar 51 
    VFS_CREATE,
52 
    VFS_CLOSE,
53 
    VFS_READ,
54 
    VFS_WRITE,
55 
    VFS_SEEK,
2521 jermar 56 
    VFS_LAST,       /* keep this the last member of the enum */
2520 jermar 57 
} vfs_request_t;
58 
 
2521 jermar 59 
 
60 
/**
61 
 * An instance of this structure is associated with a particular FS operation.
62 
 * It tells VFS if the FS supports the operation or maybe if a default one
63 
 * should be used.
64 
 */
65 
typedef enum {
2523 jermar 66 
    VFS_OP_NULL = 0,
2521 jermar 67 
    VFS_OP_DEFAULT,
68 
    VFS_OP_DEFINED
69 
} vfs_op_t;
70 
 
71 
#define FS_NAME_MAXLEN  20
72 
 
73 
/**
74 
 * A structure like this is passed to VFS by each individual FS upon its
75 
 * registration. It assosiates a human-readable identifier with each
76 
 * registered FS. More importantly, through this structure, the FS announces
77 
 * what operations it supports.
78 
 */
79 
typedef struct {
2523 jermar 80 
    /** Unique identifier of the fs. */
2526 jermar 81 
    char name[FS_NAME_MAXLEN];
2523 jermar 82 
 
83 
    /** Operations. */
84 
    vfs_op_t ops[VFS_LAST - VFS_FIRST];
2521 jermar 85 
} vfs_info_t;
86 
 
2526 jermar 87 
typedef struct {
88 
    link_t fs_link;
89 
    vfs_info_t vfs_info;
2527 jermar 90 
    ipcarg_t phone;
2526 jermar 91 
} fs_info_t;
92 
 
2535 jermar 93 
extern link_t fs_head;
94 
 
95 
extern void vfs_register(ipc_callid_t rid, ipc_call_t *request);
96 
 
2520 jermar 97 
#endif
98 
 
99 
/**
100 
 * @}
2523 jermar 101 
 */