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