| 1 | /** @file
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| 2 | * vboxsf -- VirtualBox Guest Additions for Linux: mount(2) parameter structure.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2006-2017 Oracle Corporation
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| 7 | *
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| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | * available from http://www.virtualbox.org. This file is free software;
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| 10 | * you can redistribute it and/or modify it under the terms of the GNU
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| 11 | * General Public License (GPL) as published by the Free Software
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| 12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | */
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| 16 |
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| 17 | #ifndef VBFS_MOUNT_H
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| 18 | #define VBFS_MOUNT_H
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| 19 |
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| 20 | /* Linux constraints the size of data mount argument to PAGE_SIZE - 1. */
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| 21 | #define MAX_HOST_NAME 256
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| 22 | #define MAX_NLS_NAME 32
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| 23 |
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| 24 | #define VBSF_MOUNT_SIGNATURE_BYTE_0 '\377'
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| 25 | #define VBSF_MOUNT_SIGNATURE_BYTE_1 '\376'
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| 26 | #define VBSF_MOUNT_SIGNATURE_BYTE_2 '\375'
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| 27 |
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| 28 | struct vbsf_mount_info_new {
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| 29 | /*
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| 30 | * The old version of the mount_info struct started with a
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| 31 | * char name[MAX_HOST_NAME] field, where name cannot be '\0'.
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| 32 | * So the new version of the mount_info struct starts with a
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| 33 | * nullchar field which is always 0 so that we can detect and
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| 34 | * reject the old structure being passed.
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| 35 | */
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| 36 | char nullchar;
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| 37 | char signature[3]; /* signature */
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| 38 | int length; /* length of the whole structure */
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| 39 | char name[MAX_HOST_NAME]; /* share name */
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| 40 | char nls_name[MAX_NLS_NAME]; /* name of an I/O charset */
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| 41 | int uid; /* user ID for all entries, default 0=root */
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| 42 | int gid; /* group ID for all entries, default 0=root */
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| 43 | int ttl; /* time to live */
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| 44 | int dmode; /* mode for directories if != 0xffffffff */
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| 45 | int fmode; /* mode for regular files if != 0xffffffff */
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| 46 | int dmask; /* umask applied to directories */
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| 47 | int fmask; /* umask applied to regular files */
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| 48 | };
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| 49 |
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| 50 | struct vbsf_mount_opts {
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| 51 | int uid;
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| 52 | int gid;
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| 53 | int ttl;
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| 54 | int dmode;
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| 55 | int fmode;
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| 56 | int dmask;
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| 57 | int fmask;
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| 58 | int ronly;
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| 59 | int sloppy;
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| 60 | int noexec;
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| 61 | int nodev;
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| 62 | int nosuid;
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| 63 | int remount;
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| 64 | char nls_name[MAX_NLS_NAME];
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| 65 | char *convertcp;
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| 66 | };
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| 67 |
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| 68 | /** Completes the mount operation by adding the new mount point to mtab if required. */
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| 69 | int vbsfmount_complete(const char *host_name, const char *mount_point,
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| 70 | unsigned long flags, struct vbsf_mount_opts *opts);
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| 71 |
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| 72 | #endif /* vbsfmount.h */
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