/*-
* Copyright (c) 2011, 2012, 2013 Spectra Logic Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* Authors: Justin T. Gibbs (Spectra Logic Corporation)
*/
/**
* \file vdev.h
*
* Definition of the Vdev class.
*
* Header requirements:
*
* #include <string>
* #include <list>
*
* #include <devdctl/guid.h>
*/
#ifndef _VDEV_H_
#define _VDEV_H_
/*=========================== Forward Declarations ===========================*/
struct zpool_handle;
typedef struct zpool_handle zpool_handle_t;
struct nvlist;
typedef struct nvlist nvlist_t;
/*============================= Class Definitions ============================*/
/*----------------------------------- Vdev -----------------------------------*/
/**
* \brief Wrapper class for a vdev's name/value configuration list
* simplifying access to commonly used vdev attributes.
*/
class Vdev
{
public:
/**
* \brief Instantiate a vdev object for a vdev that is a member
* of an imported pool.
*
* \param pool The pool object containing the vdev with
* configuration data provided in vdevConfig.
* \param vdevConfig Vdev configuration data.
*
* This method should be used whenever dealing with vdev's
* enumerated via the ZpoolList class. The in-core configuration
* data for a vdev does not contain all of the items found in
* the on-disk label. This requires the vdev class to augment
* the data in vdevConfig with data found in the pool object.
*/
Vdev(zpool_handle_t *pool, nvlist_t *vdevConfig);
/**
* \brief Instantiate a vdev object for a vdev that is a member
* of a pool configuration.
*
* \param poolConfig The pool configuration containing the vdev
* configuration data provided in vdevConfig.
* \param vdevConfig Vdev configuration data.
*
* This method should be used whenever dealing with vdev's
* enumerated via the ZpoolList class. The in-core configuration
* data for a vdev does not contain all of the items found in
* the on-disk label. This requires the vdev class to augment
* the data in vdevConfig with data found in the pool object.
*/
Vdev(nvlist_t *poolConfig, nvlist_t *vdevConfig);
/**
* \brief Instantiate a vdev object from a ZFS label stored on
* the device.
*
* \param vdevConfig The name/value list retrieved by reading
* the label information on a leaf vdev.
*/
Vdev(nvlist_t *vdevConfig);
/**
* \brief No-op copy constructor for nonexistent vdevs.
*/
Vdev();
/**
* \brief No-op virtual destructor, since this class has virtual
* functions.
*/
virtual ~Vdev();
bool DoesNotExist() const;
/**
* \brief Return a list of the vdev's children.
*/
std::list<Vdev> Children();
virtual DevdCtl::Guid GUID() const;
bool IsSpare() const;
virtual DevdCtl::Guid PoolGUID() const;
virtual vdev_state State() const;
std::string Path() const;
virtual std::string PhysicalPath() const;
std::string GUIDString() const;
nvlist_t *PoolConfig() const;
nvlist_t *Config() const;
Vdev Parent();
Vdev RootVdev();
std::string Name(zpool_handle_t *, bool verbose) const;
bool IsSpare();
bool IsAvailableSpare() const;
bool IsActiveSpare() const;
bool IsResilvering() const;
private:
void VdevLookupGuid();
bool VdevLookupPoolGuid();
DevdCtl::Guid m_poolGUID;
DevdCtl::Guid m_vdevGUID;
nvlist_t *m_poolConfig;
nvlist_t *m_config;
};
//- Special objects -----------------------------------------------------------
extern Vdev NonexistentVdev;
//- Vdev Inline Public Methods ------------------------------------------------
inline Vdev::~Vdev()
{
}
inline DevdCtl::Guid
Vdev::PoolGUID() const
{
return (m_poolGUID);
}
inline DevdCtl::Guid
Vdev::GUID() const
{
return (m_vdevGUID);
}
inline nvlist_t *
Vdev::PoolConfig() const
{
return (m_poolConfig);
}
inline nvlist_t *
Vdev::Config() const
{
return (m_config);
}
inline bool
Vdev::DoesNotExist() const
{
return (m_config == NULL);
}
#endif /* _VDEV_H_ */
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