
/* -*- c -*-
 * libvirt.h:
 * Summary: core interfaces for the libvirt library
 * Description: Provides the interfaces of the libvirt library to handle
 *              Xen domains from a process running in domain 0
 *
 * Copy:  Copyright (C) 2005,2006 Red Hat, Inc.
 *
 * See COPYING.LIB for the License of this software
 *
 * Author: Daniel Veillard <veillard@redhat.com>
 */

#ifndef __VIR_VIRLIB_H__
#define __VIR_VIRLIB_H__

#include <sys/types.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * virConnect:
 *
 * a virConnect is a private structure representing a connection to
 * the Xen Hypervisor.
 */
typedef struct _virConnect virConnect;

/**
 * virConnectPtr:
 *
 * a virConnectPtr is pointer to a virConnect private structure, this is the
 * type used to reference a connection to the Xen Hypervisor in the API.
 */
typedef virConnect *virConnectPtr;

/**
 * virDomain:
 *
 * a virDomain is a private structure representing a Xen domain.
 */
typedef struct _virDomain virDomain;

/**
 * virDomainPtr:
 *
 * a virDomainPtr is pointer to a virDomain private structure, this is the
 * type used to reference a Xen domain in the API.
 */
typedef virDomain *virDomainPtr;

/**
 * virDomainState:
 *
 * A domain may be in different states at a given point in time
 */
typedef enum {
     VIR_DOMAIN_NOSTATE	= 0, /* no state */
     VIR_DOMAIN_RUNNING	= 1, /* the domain is running */
     VIR_DOMAIN_BLOCKED	= 2, /* the domain is blocked on resource */
     VIR_DOMAIN_PAUSED	= 3, /* the domain is paused by user */
     VIR_DOMAIN_SHUTDOWN= 4, /* the domain is being shut down */
     VIR_DOMAIN_SHUTOFF	= 5, /* the domain is shut off */
     VIR_DOMAIN_CRASHED = 6  /* the domain is crashed */
} virDomainState;

/**
 * virDomainInfoPtr:
 *
 * a virDomainInfo is a structure filled by virDomainGetInfo() and extracting
 * runtime informations for a given active Domain
 */

typedef struct _virDomainInfo virDomainInfo;

struct _virDomainInfo {
    unsigned char state;	/* the running state, one of virDomainFlags */
    unsigned long maxMem;	/* the maximum memory in KBytes allowed */
    unsigned long memory;	/* the memory in KBytes used by the domain */
    unsigned short nrVirtCpu;	/* the number of virtual CPUs for the domain */
    unsigned long long cpuTime;	/* the CPU time used in nanoseconds */
};

/**
 * virDomainInfoPtr:
 *
 * a virDomainInfoPtr is a pointer to a virDomainInfo structure.
 */

typedef virDomainInfo *virDomainInfoPtr;

/**
 * virDomainCreateFlags:
 *
 * Flags OR'ed together to provide specific behaviour when creating a
 * Domain.
 */
typedef enum {
     VIR_DOMAIN_NONE = 0
} virDomainCreateFlags;

/**
 * virNodeInfoPtr:
 *
 * a virNodeInfo is a structure filled by virNodeGetInfo() and providing
 * the informations for the Node. 
 */

typedef struct _virNodeInfo virNodeInfo;

struct _virNodeInfo {
    char model[32];	/* string indicating the CPU model */
    unsigned long memory;/* memory size in kilobytes */
    unsigned int cpus;	/* the number of active CPUs */
    unsigned int mhz;	/* expected CPU frequency */
    unsigned int nodes;	/* the number of NUMA cell, 1 for uniform mem access */
    unsigned int sockets;/* number of CPU socket per node */
    unsigned int cores;	/* number of core per socket */
    unsigned int threads;/* number of threads per core */
};


/**
 * virDomainSchedParameterType:
 *
 * A scheduler parameter field type
 */
typedef enum {
    VIR_DOMAIN_SCHED_FIELD_INT     = 1,	/* integer case */
    VIR_DOMAIN_SCHED_FIELD_UINT    = 2,	/* unsigned integer case */
    VIR_DOMAIN_SCHED_FIELD_LLONG   = 3,	/* long long case */
    VIR_DOMAIN_SCHED_FIELD_ULLONG  = 4,	/* unsigned long long case */
    VIR_DOMAIN_SCHED_FIELD_DOUBLE  = 5,	/* double case */
    VIR_DOMAIN_SCHED_FIELD_BOOLEAN = 6	/* boolean(character) case */
} virSchedParameterType;

/**
 * VIR_DOMAIN_SCHED_FIELD_LENGTH:
 *
 * Macro providing the field length of virSchedParameter
 */

#define VIR_DOMAIN_SCHED_FIELD_LENGTH 80

/**
 * virDomainSchedParameter:
 *
 * a virDomainSchedParameter is the set of scheduler parameters
 */

typedef struct _virSchedParameter virSchedParameter;

struct _virSchedParameter {
    char field[VIR_DOMAIN_SCHED_FIELD_LENGTH];	/* parameter name */
    int type;	/* parameter type */
    union {
        int i;				/* data for integer case */
        unsigned int ui;	/* data for unsigned integer case */
        long long int l;	/* data for long long integer case */
        unsigned long long int ul;	/* data for unsigned long long integer case */
        double d;	/* data for double case */
        char b;		/* data for char case */
    } value; /* parameter value */
};

/**
 * virSchedParameterPtr:
 *
 * a virSchedParameterPtr is a pointer to a virSchedParameter structure.
 */

typedef virSchedParameter *virSchedParameterPtr;

/*
 * Fetch scheduler parameters, caller allocates 'params' field of size 'nparams'
 */
int	virDomainGetSchedulerParameters	(virDomainPtr domain,
					 virSchedParameterPtr params,
					 int *nparams);

/*
 * Change scheduler parameters
 */
int	virDomainSetSchedulerParameters	(virDomainPtr domain,
					 virSchedParameterPtr params,
					 int nparams);

/**
 * virDomainBlockStats:
 *
 * Block device stats for virDomainBlockStats.
 *
 * Hypervisors may return a field set to ((long long)-1) which indicates
 * that the hypervisor does not support that statistic.
 *
 * NB. Here 'long long' means 64 bit integer.
 */
typedef struct _virDomainBlockStats virDomainBlockStatsStruct;

struct _virDomainBlockStats {
  long long rd_req;
  long long rd_bytes;
  long long wr_req;
  long long wr_bytes;
  long long errs;   /* In Xen this returns the mysterious 'oo_req'. */
};

/**
 * virDomainBlockStatsPtr:
 *
 * A pointer to a virDomainBlockStats structure
 */
typedef virDomainBlockStatsStruct *virDomainBlockStatsPtr;

/**
 * virDomainInterfaceStats:
 *
 * Network interface stats for virDomainInterfaceStats.
 *
 * Hypervisors may return a field set to ((long long)-1) which indicates
 * that the hypervisor does not support that statistic.
 *
 * NB. Here 'long long' means 64 bit integer.
 */
typedef struct _virDomainInterfaceStats virDomainInterfaceStatsStruct;

struct _virDomainInterfaceStats {
  long long rx_bytes;
  long long rx_packets;
  long long rx_errs;
  long long rx_drop;
  long long tx_bytes;
  long long tx_packets;
  long long tx_errs;
  long long tx_drop;
};

/**
 * virDomainInterfaceStatsPtr:
 *
 * A pointe to a virDomainInterfaceStats structure
 */
typedef virDomainInterfaceStatsStruct *virDomainInterfaceStatsPtr;


/* Domain migration flags. */
typedef enum {
  VIR_MIGRATE_LIVE              = 1, /* live migration */
} virDomainMigrateFlags;

/* Domain migration. */
virDomainPtr virDomainMigrate (virDomainPtr domain, virConnectPtr dconn,
			       unsigned long flags, const char *dname,
			       const char *uri, unsigned long bandwidth);

/**
 * VIR_NODEINFO_MAXCPUS:
 * @nodeinfo: virNodeInfo instance
 *
 * This macro is to calculate the total number of CPUs supported
 * but not neccessarily active in the host.
 */


#define VIR_NODEINFO_MAXCPUS(nodeinfo) ((nodeinfo).nodes*(nodeinfo).sockets*(nodeinfo).cores*(nodeinfo).threads)

/**
 * virNodeInfoPtr:
 *
 * a virNodeInfoPtr is a pointer to a virNodeInfo structure.
 */

typedef virNodeInfo *virNodeInfoPtr;

/**
 * virConnectFlags
 *
 * Flags when openning a connection to a hypervisor
 */
typedef enum {
    VIR_CONNECT_RO = 1,    /* A readonly connection */
} virConnectFlags;


typedef enum {
    VIR_CRED_USERNAME = 1,     /* Identity to act as */
    VIR_CRED_AUTHNAME = 2,     /* Identify to authorize as */
    VIR_CRED_LANGUAGE = 3,     /* RFC 1766 languages, comma separated */
    VIR_CRED_CNONCE = 4,       /* client supplies a nonce */
    VIR_CRED_PASSPHRASE = 5,   /* Passphrase secret */
    VIR_CRED_ECHOPROMPT = 6,   /* Challenge response */
    VIR_CRED_NOECHOPROMPT = 7, /* Challenge response */
    VIR_CRED_REALM = 8,        /* Authentication realm */
    VIR_CRED_EXTERNAL = 9,     /* Externally managed credential */

    /* More may be added - expect the unexpected */
} virConnectCredentialType;

struct _virConnectCredential {
    int type; /* One of virConnectCredentialType constants */
    const char *prompt; /* Prompt to show to user */
    const char *challenge; /* Additional challenge to show */
    const char *defresult; /* Optional default result */
    char *result; /* Result to be filled with user response (or defresult) */
    unsigned int resultlen; /* Length of the result */
};

typedef struct _virConnectCredential virConnectCredential;
typedef virConnectCredential *virConnectCredentialPtr;


/**
 * virConnectCredCallbackPtr
 *
 * @param authtype type of authentication being performed
 * @param cred list of virConnectCredential object to fetch from user
 * @param ncred size of cred list
 * @param cbdata opaque data passed to virConnectOpenAuth
 * 
 * When authentication requires one or more interactions, this callback
 * is invoked. For each interaction supplied, data must be gathered
 * from the user and filled in to the 'result' and 'resultlen' fields.
 * If an interaction can not be filled, fill in NULL and 0.
 *
 * Return 0 if all interactions were filled, or -1 upon error
 */
typedef int (*virConnectAuthCallbackPtr)(virConnectCredentialPtr cred,
					 unsigned int ncred,
					 void *cbdata);

struct _virConnectAuth {
    int *credtype; /* List of supported virConnectCredentialType values */
    unsigned int ncredtype;

    virConnectAuthCallbackPtr cb; /* Callback used to collect credentials */
    void *cbdata;
};


typedef struct _virConnectAuth virConnectAuth;
typedef virConnectAuth *virConnectAuthPtr;

extern virConnectAuthPtr virConnectAuthPtrDefault;

/**
 * VIR_UUID_BUFLEN:
 *
 * This macro provides the length of the buffer required
 * for virDomainGetUUID()
 */

#define VIR_UUID_BUFLEN (16)

/**
 * VIR_UUID_STRING_BUFLEN:
 *
 * This macro provides the length of the buffer required
 * for virDomainGetUUIDString()
 */

#define VIR_UUID_STRING_BUFLEN (36+1)

/* library versionning */

/**
 * LIBVIR_VERSION_NUMBER:
 *
 * Macro providing the version of the library as 
 * version * 1,000,000 + minor * 1000 + micro
 */

#define LIBVIR_VERSION_NUMBER 4000

int			virGetVersion		(unsigned long *libVer,
						 const char *type,
						 unsigned long *typeVer);

/*
 * Connection and disconnections to the Hypervisor
 */
int			virInitialize		(void);

virConnectPtr		virConnectOpen		(const char *name);
virConnectPtr		virConnectOpenReadOnly	(const char *name);
virConnectPtr           virConnectOpenAuth      (const char *name,
						 virConnectAuthPtr auth,
						 int flags);
int			virConnectClose		(virConnectPtr conn);
const char *		virConnectGetType	(virConnectPtr conn);
int			virConnectGetVersion	(virConnectPtr conn,
						 unsigned long *hvVer);
char *                  virConnectGetHostname   (virConnectPtr conn);
char *                  virConnectGetURI        (virConnectPtr conn);


/*
 * Capabilities of the connection / driver.
 */

int                     virConnectGetMaxVcpus   (virConnectPtr conn,
						 const char *type);
int			virNodeGetInfo		(virConnectPtr conn,
						 virNodeInfoPtr info);
char *                  virConnectGetCapabilities (virConnectPtr conn);

unsigned long long	virNodeGetFreeMemory	(virConnectPtr conn);

/*
 * Gather list of running domains
 */
int			virConnectListDomains	(virConnectPtr conn,
						 int *ids,
						 int maxids);

/*
 * Number of domains
 */
int			virConnectNumOfDomains	(virConnectPtr conn);


/*
 * Get connection from domain.
 */
virConnectPtr		virDomainGetConnect     (virDomainPtr domain);

/*
 * Domain creation and destruction
 */
virDomainPtr		virDomainCreateLinux	(virConnectPtr conn,
						 const char *xmlDesc,
						 unsigned int flags);
virDomainPtr		virDomainLookupByName	(virConnectPtr conn,
						 const char *name);
virDomainPtr		virDomainLookupByID	(virConnectPtr conn,
						 int id);
virDomainPtr		virDomainLookupByUUID	(virConnectPtr conn,
						 const unsigned char *uuid);
virDomainPtr		virDomainLookupByUUIDString	(virConnectPtr conn,
							const char *uuid);

int			virDomainShutdown	(virDomainPtr domain);
int			virDomainReboot		(virDomainPtr domain,
						 unsigned int flags);
int			virDomainDestroy	(virDomainPtr domain);
int			virDomainFree		(virDomainPtr domain);

/*
 * Domain suspend/resume
 */
int			virDomainSuspend	(virDomainPtr domain);
int			virDomainResume		(virDomainPtr domain);

/*
 * Domain save/restore
 */
int			virDomainSave		(virDomainPtr domain,
						 const char *to);
int			virDomainRestore	(virConnectPtr conn,
						 const char *from);

/*
 * Domain core dump
 */
int			virDomainCoreDump	(virDomainPtr domain,
						 const char *to,
						 int flags);

/*
 * Domain runtime informations
 */
int			virDomainGetInfo	(virDomainPtr domain,
						 virDomainInfoPtr info);
						 
/*
 * Return scheduler type in effect 'sedf', 'credit', 'linux'
 */
char * 			virDomainGetSchedulerType(virDomainPtr domain,
						 int *nparams);

/*
 * Dynamic control of domains
 */
const char *		virDomainGetName	(virDomainPtr domain);
unsigned int		virDomainGetID		(virDomainPtr domain);
int			virDomainGetUUID	(virDomainPtr domain,
						 unsigned char *uuid);
int			virDomainGetUUIDString	(virDomainPtr domain, 
						char *buf);
char *			virDomainGetOSType	(virDomainPtr domain);
unsigned long		virDomainGetMaxMemory	(virDomainPtr domain);
int			virDomainSetMaxMemory	(virDomainPtr domain,
						 unsigned long memory);
int			virDomainSetMemory	(virDomainPtr domain,
						 unsigned long memory);
int			virDomainGetMaxVcpus	(virDomainPtr domain);

/*
 * XML domain description
 */
/**
 * virDomainXMLFlags:
 *
 * Flags available for virDomainGetXMLDesc
 */

typedef enum {
    VIR_DOMAIN_XML_SECURE = 1, /* dump security sensitive informations too */
    VIR_DOMAIN_XML_INACTIVE = 2/* dump inactive domain informations */
} virDomainXMLFlags;

char *			virDomainGetXMLDesc	(virDomainPtr domain,
						 int flags);

int                     virDomainBlockStats     (virDomainPtr dom,
						 const char *path,
						 virDomainBlockStatsPtr stats,
						 size_t size);
int                     virDomainInterfaceStats (virDomainPtr dom,
						 const char *path,
						 virDomainInterfaceStatsPtr stats,
						 size_t size);


/*
 * defined but not running domains
 */
virDomainPtr		virDomainDefineXML	(virConnectPtr conn,
						 const char *xml);
int			virDomainUndefine	(virDomainPtr domain);
int                     virConnectNumOfDefinedDomains  (virConnectPtr conn);
int			virConnectListDefinedDomains (virConnectPtr conn,
						 char **const names,
						 int maxnames);
int			virDomainCreate		(virDomainPtr domain);

int			virDomainGetAutostart	(virDomainPtr domain,
						 int *autostart);
int			virDomainSetAutostart	(virDomainPtr domain,
						 int autostart);

/**
 * virVcpuInfo: structure for information about a virtual CPU in a domain.
 */

typedef enum {
    VIR_VCPU_OFFLINE	= 0,	/* the virtual CPU is offline */
    VIR_VCPU_RUNNING	= 1,	/* the virtual CPU is running */
    VIR_VCPU_BLOCKED	= 2,	/* the virtual CPU is blocked on resource */
} virVcpuState;

typedef struct _virVcpuInfo virVcpuInfo;
struct _virVcpuInfo {
    unsigned int number;	/* virtual CPU number */
    int state;			/* value from virVcpuState */
    unsigned long long cpuTime; /* CPU time used, in nanoseconds */
    int cpu;			/* real CPU number, or -1 if offline */
};
typedef virVcpuInfo *virVcpuInfoPtr;

int			virDomainSetVcpus	(virDomainPtr domain,
						 unsigned int nvcpus);

int			virDomainPinVcpu	(virDomainPtr domain,
						 unsigned int vcpu,
						 unsigned char *cpumap,
						 int maplen);

/**
 * VIR_USE_CPU:
 * @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN/OUT)
 * @cpu: the physical CPU number
 *
 * This macro is to be used in conjonction with virDomainPinVcpu() API.
 * USE_CPU macro set the bit (CPU usable) of the related cpu in cpumap.
 */

#define VIR_USE_CPU(cpumap,cpu)	(cpumap[(cpu)/8] |= (1<<((cpu)%8)))

/**
 * VIR_UNUSE_CPU:
 * @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN/OUT)
 * @cpu: the physical CPU number
 *
 * This macro is to be used in conjonction with virDomainPinVcpu() API.
 * USE_CPU macro reset the bit (CPU not usable) of the related cpu in cpumap.
 */

#define VIR_UNUSE_CPU(cpumap,cpu)	(cpumap[(cpu)/8] &= ~(1<<((cpu)%8)))

/**
 * VIR_CPU_MAPLEN:
 * @cpu: number of physical CPUs
 *
 * This macro is to be used in conjonction with virDomainPinVcpu() API.
 * It returns the length (in bytes) required to store the complete
 * CPU map between a single virtual & all physical CPUs of a domain.
 */

#define VIR_CPU_MAPLEN(cpu)      (((cpu)+7)/8)


int			virDomainGetVcpus	(virDomainPtr domain,
						 virVcpuInfoPtr info,
						 int maxinfo,
						 unsigned char *cpumaps,
						 int maplen);

/**
 * VIR_CPU_USABLE:
 * @cpumaps: pointer to an array of cpumap (in 8-bit bytes) (IN)
 * @maplen: the length (in bytes) of one cpumap
 * @vcpu: the virtual CPU number
 * @cpu: the physical CPU number
 *
 * This macro is to be used in conjonction with virDomainGetVcpus() API.
 * VIR_CPU_USABLE macro returns a non zero value (true) if the cpu
 * is usable by the vcpu, and 0 otherwise.
 */

#define VIR_CPU_USABLE(cpumaps,maplen,vcpu,cpu) \
	(cpumaps[((vcpu)*(maplen))+((cpu)/8)] & (1<<((cpu)%8)))

/**
 * VIR_COPY_CPUMAP:
 * @cpumaps: pointer to an array of cpumap (in 8-bit bytes) (IN)
 * @maplen: the length (in bytes) of one cpumap
 * @vcpu: the virtual CPU number
 * @cpumap: pointer to a cpumap (in 8-bit bytes) (OUT)
 *	This cpumap must be previously allocated by the caller
 *      (ie: malloc(maplen))
 *
 * This macro is to be used in conjonction with virDomainGetVcpus() and
 * virDomainPinVcpu() APIs. VIR_COPY_CPUMAP macro extract the cpumap of
 * the specified vcpu from cpumaps array and copy it into cpumap to be used
 * later by virDomainPinVcpu() API.
 */
#define VIR_COPY_CPUMAP(cpumaps,maplen,vcpu,cpumap) \
	memcpy(cpumap, &(cpumaps[(vcpu)*(maplen)]), (maplen))


/**
 * VIR_GET_CPUMAP:
 * @cpumaps: pointer to an array of cpumap (in 8-bit bytes) (IN)
 * @maplen: the length (in bytes) of one cpumap
 * @vcpu: the virtual CPU number
 *
 * This macro is to be used in conjonction with virDomainGetVcpus() and
 * virDomainPinVcpu() APIs. VIR_GET_CPUMAP macro returns a pointer to the
 * cpumap of the specified vcpu from cpumaps array.
 */
#define VIR_GET_CPUMAP(cpumaps,maplen,vcpu)	&(cpumaps[(vcpu)*(maplen)])

int virDomainAttachDevice(virDomainPtr domain, const char *xml);
int virDomainDetachDevice(virDomainPtr domain, const char *xml);

/*
 * NUMA support
 */

int			 virNodeGetCellsFreeMemory(virConnectPtr conn,
						   unsigned long long *freeMems,
						   int startCell,
						   int maxCells);

/*
 * Virtual Networks API
 */

/**
 * virNetwork:
 *
 * a virNetwork is a private structure representing a virtual network.
 */
typedef struct _virNetwork virNetwork;

/**
 * virNetworkPtr:
 *
 * a virNetworkPtr is pointer to a virNetwork private structure, this is the
 * type used to reference a virtual network in the API.
 */
typedef virNetwork *virNetworkPtr;

/*
 * Get connection from network.
 */
virConnectPtr		virNetworkGetConnect    (virNetworkPtr network);

/*
 * List active networks
 */
int			virConnectNumOfNetworks	(virConnectPtr conn);
int			virConnectListNetworks	(virConnectPtr conn,
						 char **const names,
						 int maxnames);

/*
 * List inactive networks
 */
int			virConnectNumOfDefinedNetworks	(virConnectPtr conn);
int			virConnectListDefinedNetworks	(virConnectPtr conn,
							 char **const names,
							 int maxnames);

/*
 * Lookup network by name or uuid
 */
virNetworkPtr		virNetworkLookupByName		(virConnectPtr conn,
							 const char *name);
virNetworkPtr 		virNetworkLookupByUUID		(virConnectPtr conn,
							 const unsigned char *uuid);
virNetworkPtr		virNetworkLookupByUUIDString	(virConnectPtr conn,
							 const char *uuid);

/*
 * Create active transient network
 */
virNetworkPtr		virNetworkCreateXML	(virConnectPtr conn,
						 const char *xmlDesc);

/*
 * Define inactive persistent network
 */
virNetworkPtr		virNetworkDefineXML	(virConnectPtr conn,
						 const char *xmlDesc);

/*
 * Delete persistent network
 */
int			virNetworkUndefine	(virNetworkPtr network);

/*
 * Activate persistent network
 */
int			virNetworkCreate	(virNetworkPtr network);

/*
 * Network destroy/free
 */
int			virNetworkDestroy	(virNetworkPtr network);
int			virNetworkFree		(virNetworkPtr network);

/*
 * Network informations
 */
const char*		virNetworkGetName	(virNetworkPtr network);
int			virNetworkGetUUID	(virNetworkPtr network,
						 unsigned char *uuid);
int			virNetworkGetUUIDString	(virNetworkPtr network,
						 char *buf);
char *			virNetworkGetXMLDesc	(virNetworkPtr network,
						 int flags);
char *			virNetworkGetBridgeName (virNetworkPtr network);

int			virNetworkGetAutostart	(virNetworkPtr network,
						 int *autostart);
int			virNetworkSetAutostart	(virNetworkPtr network,
						 int autostart);

#ifdef __cplusplus
}
#endif

#endif /* __VIR_VIRLIB_H__ */
