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/* Exported types for the mount server
Copyright (C) 1996 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Modes a particular mount may have. */
#define MOUNT_READ 0x1 /* We only read. */
#define MOUNT_WRITE 0x2 /* We write too. */
#define MOUNT_FORCE 0x4 /* Used to try forcing a writable mount. */
/* The condition we think a file system is in (this refers to the permanent
storage from which it is backed, not an active file system). */
enum mount_state
{
MOUNT_STATE_UNKNOWN, /* Just so. When this value is passed to a
mount routine that takes a state argument,
it usually means `keep the last known
state'. */
MOUNT_STATE_SUSPICIOUS, /* We think it may have been compromised. */
MOUNT_STATE_DIRTY, /* May be transiently inconsistent. This is
the normal state for an active writable
file system. */
MOUNT_STATE_CLEAN /* Peachy. */
};
typedef enum mount_state mount_state_t; /* For mig's use. */
/* How the key associated with a filesystem is interpreted. */
enum mount_key_class
{
MOUNT_KEY_UNKNOWN, /* */
MOUNT_KEY_FILE, /* A file (including e.g., `/dev/rsd0a'). */
MOUNT_KEY_DEVICE /* A mach device name. */
};
typedef enum mount_key_class mount_key_class_t; /* For mig's use. */
/* Types of multiple mounts of a single filesystem that are allowed. */
enum mount_excl
{
MOUNT_EXCL_NONE, /* Both multiple readers and multiple writers
allowed; some external private protocol
must be used to main consistency. */
MOUNT_EXCL_WRITE, /* Multiple readers allowed, but if there's a
writer, it must be the only mount. */
MOUNT_EXCL_RDWR /* Only a single mount of any type allowed. */
};
typedef enum mount_excl mount_excl_t; /* For mig */
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