Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
MFSLivesMountArgs.h
/* |
File: MFSLivesMountArgs.h |
Contains: Definition of the mount arguments for MFSLives. |
Written by: DTS |
Copyright: Copyright (c) 2006 by Apple Computer, Inc., All Rights Reserved. |
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Change History (most recent first): |
$Log: MFSLivesMountArgs.h,v $ |
Revision 1.1 2006/07/27 15:48:04 eskimo1 |
First checked in. |
*/ |
#ifndef _MFSLIVESMOUNTARGS_H_ |
#define _MFSLIVESMOUNTARGS_H_ |
#include <stdint.h> |
// MFSLivesMountArgs is the structure that is the data passed to the <x-man-page://2/mount>. |
// This tells the kernel and our VFS plug-in exactly what to mount. Part of the structure |
// (actually, just fDevNodePath) is interpreted by the kernel, and the rest is only |
// interpreted by our mount entry point (VFSOPMount). The mechanics of this are explained |
// in more detail in the comments in VFSOPMount. |
// |
// IMPORTANT: |
// This structure should be invariant between 32- and 64-bits (except for the initial |
// fDevNodePath field, which must be a pointer). Otherwise a mount from a 64-bit process |
// will fail when it hits the kernel (which is always 32-bit). For this reason, |
// fForceFailure is a uint32_t rather than a boolean_t. |
enum { |
kMFSLivesMountArgsMagic = 'MFMa' |
}; |
struct MFSLivesMountArgs { |
#if ! KERNEL |
const char * fDevNodePath; // path to block device node to mount (for example, /dev/disk3s10) |
#endif |
uint32_t fMagic; // must be kMFSLivesMountArgsMagic |
uint32_t fForceMount; // allow mounting on non-512 byte block devices |
uint32_t fForceFailure; // if non-zero, mount will always fail |
}; |
typedef struct MFSLivesMountArgs MFSLivesMountArgs; |
#endif |
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