a25a5221d9
to determine that the daemon has restarted -- rather that daemon is receiving upcalls from the kernel that were processed by the old instance of the daemon -- add a version to the upcall mechanism. when daemon starts up it generates a version number (just a timestamp). it passes this value to the driver on start up via "start_ioctl" downcall. the driver saves that value in its device extensions. it uses that value in the mount and shtudown upcalls. when daemon replies to the mount command it again sends its version as a part of the reply. this reply is stored in driver;s netroot extensions. the driver uses netroot's value in each upcall to the daemon. if the daemon receives an upcall for an operation where the included version does not equal to the its current version, it fails the upcall (error_code=116). a restart of the daemon would change driver's device extension value which the driver will then use in the new mount upcalls that would establish new sessions. then the correct daemon version would be returned as a part of the mount downcalled and saved in the netroot.
85 lines
3.2 KiB
C
85 lines
3.2 KiB
C
/* Copyright (c) 2010
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* The Regents of the University of Michigan
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* All Rights Reserved
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*
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* Permission is granted to use, copy and redistribute this software
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* for noncommercial education and research purposes, so long as no
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* fee is charged, and so long as the name of the University of Michigan
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* is not used in any advertising or publicity pertaining to the use
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* or distribution of this software without specific, written prior
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* authorization. Permission to modify or otherwise create derivative
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* works of this software is not granted.
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*
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* This software is provided as is, without representation or warranty
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* of any kind either express or implied, including without limitation
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* the implied warranties of merchantability, fitness for a particular
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* purpose, or noninfringement. The Regents of the University of
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* Michigan shall not be liable for any damages, including special,
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* indirect, incidental, or consequential damages, with respect to any
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* claim arising out of or in connection with the use of the software,
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* even if it has been or is hereafter advised of the possibility of
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* such damages.
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*/
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#ifndef _NFS41_DRIVER_
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#define _NFS41_DRIVER_
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#define NFS41_DEVICE_NAME L"\\Device\\nfs41_driver"
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#define NFS41_SHADOW_DEVICE_NAME L"\\??\\nfs41_driver"
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#define NFS41_USER_DEVICE_NAME L"\\\\.\\nfs41_driver"
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#define NFS41_USER_DEVICE_NAME_A "\\\\.\\nfs41_driver"
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#define NFS41_PROVIDER_NAME_A "NFS41 Network"
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#define NFS41_PROVIDER_NAME_U L"NFS41 Network"
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#define NFS41_PIPE_NAME L"\\Device\\nfs41_pipe"
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#define NFS41_SHADOW_PIPE_NAME L"\\??\\nfs41_pipe"
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#define NFS41_USER_PIPE_NAME L"\\\\.\\nfs41_pipe"
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#define NFS41_SHARED_MEMORY_NAME L"\\BaseNamedObjects\\nfs41_shared_memory"
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#define NFS41_USER_SHARED_MEMORY_NAME "Global\\nfs41_shared_memory"
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// See "Defining I/O Control Codes" in WDK docs
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#define _RDR_CTL_CODE(code, method) \
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CTL_CODE(FILE_DEVICE_NETWORK_REDIRECTOR, 0x800 | (code), method, FILE_ANY_ACCESS)
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#define IOCTL_NFS41_START _RDR_CTL_CODE(0, METHOD_BUFFERED)
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#define IOCTL_NFS41_STOP _RDR_CTL_CODE(1, METHOD_NEITHER)
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#define IOCTL_NFS41_GETSTATE _RDR_CTL_CODE(3, METHOD_NEITHER)
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#define IOCTL_NFS41_ADDCONN _RDR_CTL_CODE(4, METHOD_BUFFERED)
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#define IOCTL_NFS41_DELCONN _RDR_CTL_CODE(5, METHOD_BUFFERED)
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#define IOCTL_NFS41_READ _RDR_CTL_CODE(6, METHOD_BUFFERED)
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#define IOCTL_NFS41_WRITE _RDR_CTL_CODE(7, METHOD_BUFFERED)
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#define IOCTL_NFS41_INVALCACHE _RDR_CTL_CODE(8, METHOD_BUFFERED)
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typedef enum _nfs41_opcodes {
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NFS41_MOUNT,
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NFS41_UNMOUNT,
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NFS41_OPEN,
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NFS41_CLOSE,
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NFS41_READ,
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NFS41_WRITE,
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NFS41_LOCK,
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NFS41_UNLOCK,
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NFS41_DIR_QUERY,
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NFS41_FILE_QUERY,
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NFS41_FILE_SET,
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NFS41_EA_SET,
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NFS41_SYMLINK,
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NFS41_VOLUME_QUERY,
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NFS41_SHUTDOWN,
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INVALID_OPCODE
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} nfs41_opcodes;
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typedef enum _nfs41_init_driver_state {
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NFS41_INIT_DRIVER_STARTABLE,
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NFS41_INIT_DRIVER_START_IN_PROGRESS,
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NFS41_INIT_DRIVER_STARTED
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} nfs41_init_driver_state;
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typedef enum _nfs41_start_driver_state {
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NFS41_START_DRIVER_STARTABLE,
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NFS41_START_DRIVER_START_IN_PROGRESS,
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NFS41_START_DRIVER_STARTED,
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NFS41_START_DRIVER_STOPPED
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} nfs41_start_driver_state;
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#endif
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