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/*
* Copyright (c) 2013-2018 Red Hat.
* Copyright (c) 1995,2005 Silicon Graphics, Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*/
#ifndef PCP_PMDA_H
#define PCP_PMDA_H
#include <stdarg.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* libpcp_pmda interface versions
*/
#define PMDA_INTERFACE_2 2 /* new function arguments */
#define PMDA_INTERFACE_3 3 /* 3-state return from fetch callback */
#define PMDA_INTERFACE_4 4 /* dynamic pmns */
#define PMDA_INTERFACE_5 5 /* client context in pmda and */
/* 4-state return from fetch callback */
#define PMDA_INTERFACE_6 6 /* client security attributes */
#define PMDA_INTERFACE_7 7 /* metric label metadata */
#define PMDA_INTERFACE_LATEST 7
/*
* Type of I/O connection to PMCD (pmdaUnknown defaults to pmdaPipe)
*/
typedef enum {pmdaPipe, pmdaInet, pmdaUnix, pmdaUnknown, pmdaIPv6} pmdaIoType;
/*
* Forward declarations of structures so that inclusion of (internal) libpcp.h
* header file is not required if this header file is included.
*/
typedef struct __pmnsTree pmdaNameSpace;
typedef struct __pmHashCtl pmdaHashTable;
/*
* Instance description: index and name
*/
typedef struct pmdaInstid {
int i_inst; /* internal instance identifier */
char *i_name; /* external instance identifier */
} pmdaInstid;
/*
* Instance domain description: unique instance id, number of instances in
* this domain, and the list of instances (not null terminated).
*/
typedef struct pmdaIndom {
pmInDom it_indom; /* indom, filled in */
int it_numinst; /* number of instances */
pmdaInstid *it_set; /* instance identifiers */
} pmdaIndom;
/*
* Metric description: handle for extending description, and the description.
*/
typedef struct pmdaMetric {
void *m_user; /* for users external use */
pmDesc m_desc; /* metric description */
} pmdaMetric;
/*
* Type of function call back used by pmdaFetch.
*/
typedef int (*pmdaFetchCallBack)(pmdaMetric *, unsigned int, pmAtomValue *);
/*
* return values for a pmdaFetchCallBack method
*/
#define PMDA_FETCH_NOVALUES 0
#define PMDA_FETCH_STATIC 1
#define PMDA_FETCH_DYNAMIC 2 /* free avp->vp after __pmStuffValue */
/*
* Type of function call back used by pmdaMain to clean up a pmResult structure
* after a fetch.
*/
typedef void (*pmdaResultCallBack)(pmResult *);
/*
* Type of function call back used by pmdaMain on receipt of each PDU to check
* availability, etc.
*/
typedef int (*pmdaCheckCallBack)(void);
/*
* Type of function call back used by pmdaMain after each PDU has been
* processed.
*/
typedef void (*pmdaDoneCallBack)(void);
/*
* Type of function call back used by pmdaMain when a client context is
* closed by PMCD.
*/
typedef void (*pmdaEndContextCallBack)(int);
/*
* Type of function call back used by pmdaLabel for instance labels.
*/
typedef int (*pmdaLabelCallBack)(pmInDom, unsigned int, pmLabelSet **);
/*
* libpcp_pmda extension structure.
*
* The fields of this structure are initialised using pmdaDaemon() or pmdaDSO()
* (if the agent is a daemon or a DSO respectively), pmdaGetOpt() and
* pmdaInit().
*/
typedef struct pmdaExt {
unsigned int e_flags; /* PMDA_EXT_FLAG_* bit field */
void *e_ext; /* used internally within libpcp_pmda */
char *e_sockname; /* socket name to pmcd */
const char *e_name; /* name of this pmda */
const char *e_logfile; /* path to log file */
const char *e_helptext; /* path to help text */
int e_status; /* =0 is OK */
int e_infd; /* input file descriptor from pmcd */
int e_outfd; /* output file descriptor to pmcd */
int e_port; /* port to pmcd */
int e_singular; /* =0 for singular values */
int e_ordinal; /* >=0 for non-singular values */
int e_direct; /* =1 if pmid map to meta table */
int e_domain; /* metrics domain */
int e_nmetrics; /* number of metrics */
int e_nindoms; /* number of instance domains */
int e_help; /* help text comes via this handle */
pmProfile *e_prof; /* last received profile */
pmdaIoType e_io; /* connection type to pmcd */
pmdaIndom *e_indoms; /* instance domain table */
pmdaIndom *e_idp; /* used in instance domain expansion */
pmdaMetric *e_metrics; /* metric description table */
pmdaResultCallBack e_resultCallBack; /* callback to clean up pmResult after fetch */
pmdaFetchCallBack e_fetchCallBack; /* callback to assign metric values in fetch */
pmdaCheckCallBack e_checkCallBack; /* callback on receipt of a PDU */
pmdaDoneCallBack e_doneCallBack; /* callback after PDU has been processed */
/* added for PMDA_INTERFACE_5 */
int e_context; /* client context id from pmcd */
pmdaEndContextCallBack e_endCallBack; /* callback after client context closed */
/* added for PMDA_INTERFACE_7 */
pmdaLabelCallBack e_labelCallBack; /* callback to lookup metric instance labels */
} pmdaExt;
#define PMDA_EXT_FLAG_DIRECT (1<<0) /* direct mapped PMID metric table */
#define PMDA_EXT_FLAG_HASHED (1<<1) /* hashed PMID metric table lookup */
#define PMDA_EXT_SETUPDONE (1<<2) /* __pmdaSetup() has been called */
#define PMDA_EXT_CONNECTED (1<<3) /* pmdaConnect() done */
#define PMDA_EXT_NOTREADY (1<<4) /* pmcd connection marked NOTREADY */
#define PMDA_EXT_LABEL_CHANGE (1<<5) /* new label metadata notification */
#define PMDA_EXT_NAMES_CHANGE (1<<6) /* metric name change notification */
/*
* Optionally restrict symbol visibility for DSO PMDAs
*
* When compiled with -fvisibility=hidden this directive can be used
* to set up the init routine so that it is the only symbol exported
* by the DSO PMDA. This gives the compiler opportunity to generate
* more optimal code as well as ensuring that just the one symbol is
* exported (which is a good idea in itself).
*/
#if !defined(IS_MINGW)
# if defined(__GNUC__)
# define __PMDA_INIT_CALL __attribute__ ((visibility ("default")))
# else
# define __PMDA_INIT_CALL
# endif
# define PMDA_CALL
#else
# define __PMDA_INIT_CALL
# if defined(PMDA_INTERNAL)
# define PMDA_CALL __declspec(dllexport)
# else
# define PMDA_CALL __declspec(dllimport)
# endif
#endif
/*
* Interface Definitions for PMDA DSO Interface
* The new interface structure makes use of a union to manage new revisions
* cleanly. The structure for each new version must be backward compatible
* to all of the previous versions (i.e. contain earlier fields unchanged).
*
* The domain field is set by pmcd(1) in the case of a DSO PMDA, and by
* pmdaDaemon and pmdaGetOpt in the case of a Daemon PMDA. It should not be
* modified.
*/
typedef struct pmdaInterface {
int domain; /* performance metrics domain id */
struct {
unsigned int pmda_interface : 8; /* PMDA DSO interface version */
unsigned int pmapi_version : 8; /* PMAPI version */
unsigned int flags : 16; /* optional feature flags */
} comm; /* set/return communication and version info */
int status; /* return initialization status here */
union {
/*
* Interface Version 2 and 3 (PCP 2.0)
* PMDA_INTERFACE_2 and PMDA_INTERFACE_3
*/
struct {
pmdaExt *ext;
int (*profile)(pmProfile *, pmdaExt *);
int (*fetch)(int, pmID *, pmResult **, pmdaExt *);
int (*desc)(pmID, pmDesc *, pmdaExt *);
int (*instance)(pmInDom, int, char *, pmInResult **, pmdaExt *);
int (*text)(int, int, char **, pmdaExt *);
int (*store)(pmResult *, pmdaExt *);
} any, two, three;
/*
* Interface Version 4 (dynamic pmns support) and Version 5 (client context
* in PMDA).
* PMDA_INTERFACE_4, PMDA_INTERFACE_5
*/
struct {
pmdaExt *ext;
int (*profile)(pmProfile *, pmdaExt *);
int (*fetch)(int, pmID *, pmResult **, pmdaExt *);
int (*desc)(pmID, pmDesc *, pmdaExt *);
int (*instance)(pmInDom, int, char *, pmInResult **, pmdaExt *);
int (*text)(int, int, char **, pmdaExt *);
int (*store)(pmResult *, pmdaExt *);
int (*pmid)(const char *, pmID *, pmdaExt *);
int (*name)(pmID, char ***, pmdaExt *);
int (*children)(const char *, int, char ***, int **, pmdaExt *);
} four, five;
/*
* Interface Version 6 (client context security attributes in PMDA).
* PMDA_INTERFACE_6
*/
struct {
pmdaExt *ext;
int (*profile)(pmProfile *, pmdaExt *);
int (*fetch)(int, pmID *, pmResult **, pmdaExt *);
int (*desc)(pmID, pmDesc *, pmdaExt *);
int (*instance)(pmInDom, int, char *, pmInResult **, pmdaExt *);
int (*text)(int, int, char **, pmdaExt *);
int (*store)(pmResult *, pmdaExt *);
int (*pmid)(const char *, pmID *, pmdaExt *);
int (*name)(pmID, char ***, pmdaExt *);
int (*children)(const char *, int, char ***, int **, pmdaExt *);
int (*attribute)(int, int, const char *, int, pmdaExt *);
} six;
/*
* Interface Version 7 (metric instance name:value labeling in PMDA).
* PMDA_INTERFACE_7
*/
struct {
pmdaExt *ext;
int (*profile)(pmProfile *, pmdaExt *);
int (*fetch)(int, pmID *, pmResult **, pmdaExt *);
int (*desc)(pmID, pmDesc *, pmdaExt *);
int (*instance)(pmInDom, int, char *, pmInResult **, pmdaExt *);
int (*text)(int, int, char **, pmdaExt *);
int (*store)(pmResult *, pmdaExt *);
int (*pmid)(const char *, pmID *, pmdaExt *);
int (*name)(pmID, char ***, pmdaExt *);
int (*children)(const char *, int, char ***, int **, pmdaExt *);
int (*attribute)(int, int, const char *, int, pmdaExt *);
int (*label)(int, int, pmLabelSet **, pmdaExt *);
} seven;
} version;
} pmdaInterface;
/* comm(unication) flags */
#define PMDA_FLAG_AUTHORIZE (1<<2) /* authentication support */
#define PMDA_FLAG_CONTAINER (1<<6) /* container name support */
/* communication attributes */
#define PMDA_ATTR_USERID 11 /* uid - user identifier (posix) */
#define PMDA_ATTR_GROUPID 12 /* gid - group identifier (posix) */
#define PMDA_ATTR_PROCESSID 14 /* pid - process identifier (posix) */
#define PMDA_ATTR_CONTAINER 15 /* container name */
/*
* PM_CONTEXT_LOCAL support
*/
typedef struct __pmDSO {
int domain;
char *name;
char *init;
void *handle;
pmdaInterface dispatch;
} __pmDSO;
/*
* Macro that can be used to create each metrics' PMID.
* cluster has a maximum value of 2^12-1
* item has a maximum value of 2^10-1
*/
#define PMDA_PMID(cluster,item) ((((cluster)&0xfff)<<10)|((item)&0x3ff))
/* Macro for pmUnits bitmap in a pmDesc declaration */
#ifdef HAVE_BITFIELDS_LTOR
#define PMDA_PMUNITS(a,b,c,d,e,f) {a,b,c,d,e,f,0}
#else
#define PMDA_PMUNITS(a,b,c,d,e,f) {0,f,e,d,c,b,a}
#endif
/* Command line option processing macros and data structures */
#define PMDA_OPTIONS "D:d:h:i:l:pu:U:"
#define PMDA_OPTIONS_HEADER(s) { "", 0, '-', 0, (s) }
#define PMDA_OPTIONS_TEXT(s) { "", 0, '|', 0, (s) }
#define PMDA_OPTIONS_END { NULL, 0, 0, 0, NULL }
#define PMDAOPT_DEBUG { "debug", 1, 'D', "DBG", \
NULL }
#define PMDAOPT_DOMAIN { "domain", 1, 'd', "NUM", \
"use domain (numeric) for metrics domain of PMDA" }
#define PMDAOPT_HELPTEXT { "helpfile", 1, 'h', "FILE", \
"path to PMDA metrics help text file" }
#define PMDAOPT_INET { "inet", 1, 'i', "PORT", \
"pmcd IPv4 connection service name or numeric port" }
#define PMDAOPT_IPV6 { "ipv6", 1, '6', "PORT", \
"pmcd IPv6 connection service name or numeric port" }
#define PMDAOPT_LOGFILE { "log", 1, 'l', "FILE", \
"write log to FILE rather than using default log name" }
#define PMDAOPT_PIPE { "pipe", 0, 'p', 0, \
"use a pipe for communication with pmcd" }
#define PMDAOPT_UNIX { "unix", 1, 'u', "FILE", \
"use a unix domain socket for communication with pmcd" }
#define PMDAOPT_USERNAME { "username", 1, 'U', "USER", \
"run the PMDA using the named user account" }
struct pmdaOptions;
#define __pmdaOptions pmdaOptions /* backward-compatibility */
typedef int (*pmdaOptionOverride)(int, struct pmdaOptions *);
typedef struct pmdaOptions {
int version;
int flags;
const char * short_options;
pmLongOptions * long_options;
const char * short_usage;
pmdaOptionOverride override;
/* out: usual getopt information */
int index;
int optind;
int opterr;
int optopt;
char *optarg;
/* internals; do not ever access */
int __initialized;
char * __nextchar;
int __ordering;
int __posixly_correct;
int __first_nonopt;
int __last_nonopt;
/* out: error count */
int errors;
/* out: PMDA options (non-pmdaInterface options) */
char * username;
} pmdaOptions;
/*
* PMDA Setup Routines.
*
* pmdaGetOpt
* pmdaGetOptions
* pmdaUsageMessage
* Replacements for pmgetopt_r(3) which strip out the standard PMDA flags
* before returning the next command line option. The standard PMDA
* flags are PMDA_OPTIONS which will initialise the pmdaExt structure
* with the IPC details, path to the log and help file, domain number,
* and the user account under which the PMDA should run.
* An error counter will be incremented if there was an error parsing any
* of these options.
*
* pmdaDaemon
* Setup the pmdaInterface structure for a daemon and initialise
* the pmdaExt structure with the PMDA's name, domain and path to
* the log file and help file. The libpcp internal state is also
* initialised.
*
* pmdaDSO
* Setup the pmdaInterface structure for a DSO and initialise the
* pmdaExt structure with the PMDA's name and help file.
*
* pmdaOpenLog
* Redirects stderr to the logfile.
*
* pmdaSetFlags / pmdaExtSetFlags / pmdaSetCommFlags
* Allow behaviour flags to be set to enable features, such as to request
* libpcp_pmda internally use direct or hashed PMID metric table mapping.
* Can be called multiple times - effects are cumulative - no flag can be
* cleared, although libpcp_pmda may disable a flag later on if it cannot
* enact the requested behaviour. Must be called before pmdaInit for any
* flags involving early setup (such as metric table hashing), otherwise
* can be called at any time (such as for namespace change notification).
*
* pmdaSetData / pmdaExtSetData / pmdaExtGetData
* Private data hook get/set for (esp. DSO) PMDAs that is accessible via
* the callbacks through the pmdaExt structure.
*
* pmdaInit
* Further initialises the pmdaExt structure with the instance domain and
* metric structures. Unique identifiers are applied to each instance
* domain and metric. Also open the help text file and checks whether the
* metrics can be directly mapped.
*
* pmdaConnect
* Connect to the PMCD process using the method set in the pmdaExt e_io
* field.
*
* pmdaMain
* Loop which receives PDUs and dispatches the callbacks. Must be called
* by a daemon PMDA.
*
* pmdaSendError
* Used to inform PMCD the PMDA is ready/notready to process requests.
* See pmcd(1) for details, in particular the protocol entry for the
* PMDA in pmcd.conf can specify "notready", in which case the PMDA
* must call pmdaSendError(dispatch, PM_ERR_PMDAREADY) when it is
* ready after starting up.
*
* pmdaSetResultCallBack
* Allows an application specific routine to be specified for cleaning up
* a pmResult after a fetch. Most PMDAs should not use this.
*
* pmdaSetFetchCallBack
* Allows an application specific routine to be specified for completing a
* pmAtom structure with a metrics value. This must be set if pmdaFetch is
* used as the fetch callback.
*
* pmdaSetCheckCallBack
* Allows an application specific routine to be called upon receipt of any
* PDU. For all PDUs except PDU_PROFILE, a result less than zero
* indicates an error. If set to zero (which is also the default),
* the callback is ignored.
*
* pmdaSetDoneCallBack
* Allows an application specific routine to be called after each PDU is
* processed. The result is ignored. If set to zero (which is also
* the default), the callback is ignored.
*
* pmdaSetEndContextCallBack
* Allows an application specific routine to be called when a
* PMCD context is closed, so any per-context state can be cleaned
* up. If set to zero (which is also the default), the callback
* is ignored.
*
* pmdaSetLabelCallBack
* Lookup any metadata labels associated with metric instances.
* Passed in a metric table entry and instance identifier and expects
* the callback to fill the given labelset structure.
*/
PMDA_CALL extern int pmdaGetOpt(int, char *const *, const char *, pmdaInterface *, int *);
PMDA_CALL extern int pmdaGetOptions(int, char *const *, pmdaOptions *, pmdaInterface *);
PMDA_CALL extern void pmdaUsageMessage(pmdaOptions *);
PMDA_CALL extern void pmdaDaemon(pmdaInterface *, int, const char *, int , const char *, const char *);
PMDA_CALL extern void pmdaDSO(pmdaInterface *, int, char *, char *);
PMDA_CALL extern void pmdaOpenLog(pmdaInterface *);
PMDA_CALL extern void *pmdaExtGetData(pmdaExt *);
PMDA_CALL extern void pmdaExtSetData(pmdaExt *, void *);
PMDA_CALL extern void pmdaSetData(pmdaInterface *, void *);
PMDA_CALL extern void pmdaExtSetFlags(pmdaExt *, int);
PMDA_CALL extern void pmdaSetFlags(pmdaInterface *, int);
PMDA_CALL extern void pmdaSetCommFlags(pmdaInterface *, int);
PMDA_CALL extern void pmdaInit(pmdaInterface *, pmdaIndom *, int, pmdaMetric *, int);
PMDA_CALL extern void pmdaConnect(pmdaInterface *);
PMDA_CALL extern void pmdaMain(pmdaInterface *);
PMDA_CALL extern void pmdaSendError(pmdaInterface *, int);
PMDA_CALL extern void pmdaSetResultCallBack(pmdaInterface *, pmdaResultCallBack);
PMDA_CALL extern void pmdaSetFetchCallBack(pmdaInterface *, pmdaFetchCallBack);
PMDA_CALL extern void pmdaSetCheckCallBack(pmdaInterface *, pmdaCheckCallBack);
PMDA_CALL extern void pmdaSetDoneCallBack(pmdaInterface *, pmdaDoneCallBack);
PMDA_CALL extern void pmdaSetEndContextCallBack(pmdaInterface *, pmdaEndContextCallBack);
PMDA_CALL extern void pmdaSetLabelCallBack(pmdaInterface *, pmdaLabelCallBack);
/*
* Callbacks to PMCD which should be adequate for most PMDAs.
* NOTE: if pmdaFetch is used, e_callback must be specified in the pmdaExt
* structure.
*
* pmdaProfile
* Store the instance profile away for the next fetch.
*
* pmdaFetch
* Resize the pmResult and call e_callback in the pmdaExt structure
* for each metric instance required by the profile.
*
* pmdaInstance
* Return description of instances and instance domains.
*
* pmdaDesc
* Return the metric description.
*
* pmdaText
* Return the help text for the metric or instance domain.
*
* pmdaStore
* Store a value into a metric. This is a no-op.
*
* pmdaPMID
* Return the PMID for a named metric within a dynamic subtree
* of the PMNS.
*
* pmdaName
* Given a PMID, return the names of all matching metrics within a
* dynamic subtree of the PMNS.
*
* pmdaChildren
* If traverse == 0, return the names of all the descendent children
* and their status, given a named metric in a dynamic subtree of
* the PMNS (this is the pmGetChildren or pmGetChildrenStatus variant).
* If traverse == 1, return the full names of all descendent metrics
* (this is the pmTraversePMNS variant, with the status added)
*
* pmdaAttribute
* Inform the agent about security aspects of a client connection,
* such as the authenticated userid. Passed in a client identifier,
* numeric PCP_ATTR, pointer to the associated value, and the length
* of the value.
*
* pmdaLabel
* Return labels for contexts, domains, metrics, indoms or instances.
* Passed in a type (PM_LABEL) and identifier (domain, metric, indom);
* fills in labelsets, returns a count thereof or negative error code.
*/
PMDA_CALL extern int pmdaProfile(pmProfile *, pmdaExt *);
PMDA_CALL extern int pmdaFetch(int, pmID *, pmResult **, pmdaExt *);
PMDA_CALL extern int pmdaInstance(pmInDom, int, char *, pmInResult **, pmdaExt *);
PMDA_CALL extern int pmdaDesc(pmID, pmDesc *, pmdaExt *);
PMDA_CALL extern int pmdaText(int, int, char **, pmdaExt *);
PMDA_CALL extern int pmdaStore(pmResult *, pmdaExt *);
PMDA_CALL extern int pmdaPMID(const char *, pmID *, pmdaExt *);
PMDA_CALL extern int pmdaName(pmID, char ***, pmdaExt *);
PMDA_CALL extern int pmdaChildren(const char *, int, char ***, int **, pmdaExt *);
PMDA_CALL extern int pmdaAttribute(int, int, const char *, int, pmdaExt *);
PMDA_CALL extern int pmdaLabel(int, int, pmLabelSet **, pmdaExt *);
/*
* PMDA "help" text manipulation
*/
PMDA_CALL extern int pmdaOpenHelp(const char *);
PMDA_CALL extern void pmdaCloseHelp(int);
PMDA_CALL extern char *pmdaGetHelp(int, pmID, int);
PMDA_CALL extern char *pmdaGetInDomHelp(int, pmInDom, int);
/*
* PMDA "label" metadata (name:value pairs) manipulation
*/
PMDA_CALL extern int pmdaAddLabels(pmLabelSet **, const char *, ...) __PM_PRINTFLIKE(2,3);
PMDA_CALL extern int pmdaAddNotes(pmLabelSet **, const char *, ...) __PM_PRINTFLIKE(2,3);
PMDA_CALL extern int pmdaAddLabelFlags(pmLabelSet *, int);
/*
* Dynamic metric table manipulation
*
* pmdaExtDynamicPMNS / pmdaDynamicPMNS
* Register a new dynamic namespace sub-tree associated with one or more
* PMID clusters. Callbacks are passed in to deal with PMDA-specific
* components (names, help text, metric duplication, and table sizing).
* pmdaExtDynamicPMNS is preferred as it works in both DSO/daemon modes;
* however pmdaDynamicPMNS is maintained for backward compatibility.
*
* pmdaDynamicLookupName
* Perform PMDA name lookup operations for the name callback, for dynamic
* metrics.
*
* pmdaDynamicLookupPMID
* Perform PMDA reverse name lookup operations for the PMID callback, for
* dynamic metrics.
*
* pmdaDynamicLookupText
* Perform PMDA help text lookup operations for dynamic metrics.
*
* pmdaDynamicMetricTable
* Install a new metric table for the PMDA, after changes to the set of
* metrics which the PMDA must export (IOW, dynamic metrics are in use).
*
* pmdaRehash
* Update the metrictable within the pmdaExt structure with new (dynamic)
* metrics and recompute the hash table used for optimised lookup. Aids
* PMDAs with large numbers of metrics to get closer to directly mapped
* PMID lookup time, rather than multiple linear table scans per fetch.
* [NOTE: can be used by any interface version, not only dynamic metrics]
*/
typedef int (*pmdaUpdatePMNS)(pmdaExt *, pmdaNameSpace **);
typedef int (*pmdaUpdateText)(pmdaExt *, pmID, int, char **);
typedef void (*pmdaUpdateMetric)(pmdaMetric *, pmdaMetric *, int);
typedef void (*pmdaCountMetrics)(int *, int *);
PMDA_CALL extern void pmdaExtDynamicPMNS(const char *, int *, int,
pmdaUpdatePMNS, pmdaUpdateText,
pmdaUpdateMetric, pmdaCountMetrics,
pmdaMetric *, int, pmdaExt *);
PMDA_CALL extern void pmdaDynamicPMNS(const char *, int *, int,
pmdaUpdatePMNS, pmdaUpdateText,
pmdaUpdateMetric, pmdaCountMetrics,
pmdaMetric *, int);
PMDA_CALL extern int pmdaDynamicSetClusterMask(const char *, unsigned int);
PMDA_CALL extern pmdaNameSpace *pmdaDynamicLookupName(pmdaExt *, const char *);
PMDA_CALL extern pmdaNameSpace *pmdaDynamicLookupPMID(pmdaExt *, pmID);
PMDA_CALL extern int pmdaDynamicLookupText(pmID, int, char **, pmdaExt *);
PMDA_CALL extern void pmdaDynamicMetricTable(pmdaExt *);
PMDA_CALL extern void pmdaRehash(pmdaExt *, pmdaMetric *, int);
/*
* Dynamic names interface (version 4) helper routines.
*
* pmdaTreePMID
* when a pmdaNameSpace is being used, this provides
* an implementation for the four.pmid() interface.
*
* pmdaTreeName
* when a pmdaNameSpace is being used, this provides
* an implementation for the four.name() interface.
*
* pmdaTreeChildren
* when a pmdaNameSpace is being used, this provides
* an implementation for the four.children() interface.
*
* pmdaTreeRebuildHash
* iterate over a pmdaNameSpace and (re)build the hash
* for any subsequent PMID -> name (reverse) lookups
*
* pmdaTreeSize
* returns the numbers of entries in a pmdaNameSpace.
*/
PMDA_CALL extern int pmdaTreePMID(pmdaNameSpace *, const char *, pmID *);
PMDA_CALL extern int pmdaTreeName(pmdaNameSpace *, pmID, char ***);
PMDA_CALL extern int pmdaTreeChildren(pmdaNameSpace *, const char *, int, char ***, int **);
PMDA_CALL extern void pmdaTreeRebuildHash(pmdaNameSpace *, int);
PMDA_CALL extern int pmdaTreeSize(pmdaNameSpace *);
PMDA_CALL extern int pmdaTreeCreate(pmdaNameSpace **);
PMDA_CALL extern int pmdaTreeInsert(pmdaNameSpace *, pmID, const char *);
PMDA_CALL extern void pmdaTreeRelease(pmdaNameSpace *);
/*
* PMDA instance domain cache support
*
* pmdaCacheStore
* add entry into the cache, or change state, assigns internal
* instance identifier
*
* pmdaCacheStoreKey
* add entry into the cache, or change state, caller provides "hint"
* for internal instance identifier
*
* pmdaCacheLookup
* fetch entry based on internal instance identifier
*
* pmdaCacheLookupName
* fetch entry based on external instance name
*
* pmdaCacheLookupKey
* fetch entry based on key as "hint", like pmdaCacheStoreKey()
*
* pmdaCacheOp
* service routines to load, unload, mark as write-thru, purge,
* count entries, etc
*
* pmdaCachePurge
* cull inactive entries
*
* pmdaCacheResize
* set the maximum instance identifier
*/
PMDA_CALL extern int pmdaCacheStore(pmInDom, int, const char *, void *);
PMDA_CALL extern int pmdaCacheStoreKey(pmInDom, int, const char *, int, const void *, void *);
PMDA_CALL extern int pmdaCacheLookup(pmInDom, int, char **, void **);
PMDA_CALL extern int pmdaCacheLookupName(pmInDom, const char *, int *, void **);
PMDA_CALL extern int pmdaCacheLookupKey(pmInDom, const char *, int, const void *, char **, int *, void **);
PMDA_CALL extern int pmdaCacheOp(pmInDom, int);
PMDA_CALL extern int pmdaCachePurge(pmInDom, time_t);
PMDA_CALL extern int pmdaCacheResize(pmInDom, int);
#define PMDA_CACHE_LOAD 1
#define PMDA_CACHE_ADD 2
#define PMDA_CACHE_HIDE 3
#define PMDA_CACHE_CULL 4
#define PMDA_CACHE_EMPTY 5
#define PMDA_CACHE_SAVE 6
#define PMDA_CACHE_STRINGS 7
#define PMDA_CACHE_ACTIVE 8
#define PMDA_CACHE_INACTIVE 9
#define PMDA_CACHE_SIZE 10
#define PMDA_CACHE_SIZE_ACTIVE 11
#define PMDA_CACHE_SIZE_INACTIVE 12
#define PMDA_CACHE_REUSE 13
#define PMDA_CACHE_WALK_REWIND 14
#define PMDA_CACHE_WALK_NEXT 15
#define PMDA_CACHE_CHECK 16
#define PMDA_CACHE_REORG 17
#define PMDA_CACHE_SYNC 18
#define PMDA_CACHE_DUMP 19
#define PMDA_CACHE_DUMP_ALL 20
/*
* Internal libpcp_pmda routines.
*
* __pmdaCntInst
* Returns the number of instances for an entry in the instance domain
* table.
*
* __pmdaStartInst
* Setup for __pmdaNextInst to iterate over an instance domain.
*
* __pmdaNextInst
* Step through an instance domain, returning instances one at a
* time.
*
* __pmdaMainPDU
* Use this when you need to override pmdaMain and construct
* your own loop.
* Call this function in the _body_ of your loop.
* See pmdaMain code for an example.
* Returns negative int on failure, 0 otherwise.
*
* __pmdaInFd
* This returns the file descriptor that is used to get the
* PDU from pmcd.
* One may use the fd to do a select call in a custom main loop.
* Returns negative int on failure, file descriptor otherwise.
*
* __pmdaCacheDumpAll and __pmdaCacheDump
* print out cache contents
*/
PMDA_CALL extern int __pmdaCntInst(pmInDom, pmdaExt *);
PMDA_CALL extern void __pmdaStartInst(pmInDom, pmdaExt *);
PMDA_CALL extern int __pmdaNextInst(int *, pmdaExt *);
PMDA_CALL extern int __pmdaMainPDU(pmdaInterface *);
PMDA_CALL extern int __pmdaInFd(pmdaInterface *);
PMDA_CALL extern void __pmdaCacheDumpAll(FILE *, int);
PMDA_CALL extern void __pmdaCacheDump(FILE *, pmInDom, int);
/*
* Client Context support
*/
PMDA_CALL extern int pmdaGetContext(void);
PMDA_CALL extern void __pmdaSetContext(int);
/*
* Event Record support
*/
PMDA_CALL extern int pmdaEventNewArray(void);
PMDA_CALL extern int pmdaEventResetArray(int);
PMDA_CALL extern int pmdaEventReleaseArray(int);
PMDA_CALL extern int pmdaEventAddRecord(int, struct timeval *, int);
PMDA_CALL extern int pmdaEventAddMissedRecord(int, struct timeval *, int);
PMDA_CALL extern int pmdaEventAddParam(int, pmID, int, pmAtomValue *);
PMDA_CALL extern pmEventArray *pmdaEventGetAddr(int);
/*
* High Resolution Timer Event Record support
*/
PMDA_CALL extern int pmdaEventNewHighResArray(void);
PMDA_CALL extern int pmdaEventResetHighResArray(int);
PMDA_CALL extern int pmdaEventReleaseHighResArray(int);
PMDA_CALL extern int pmdaEventAddHighResRecord(int, struct timespec *, int);
PMDA_CALL extern int pmdaEventAddHighResMissedRecord(int, struct timespec *, int);
PMDA_CALL extern int pmdaEventHighResAddParam(int, pmID, int, pmAtomValue *);
PMDA_CALL extern pmHighResEventArray *pmdaEventHighResGetAddr(int);
/*
* Event Queue support
*/
PMDA_CALL extern int pmdaEventNewQueue(const char *, size_t);
PMDA_CALL extern int pmdaEventNewActiveQueue(const char *, size_t, unsigned int);
PMDA_CALL extern int pmdaEventQueueShutdown(int);
PMDA_CALL extern int pmdaEventQueueHandle(const char *);
PMDA_CALL extern int pmdaEventQueueAppend(int, void *, size_t, struct timeval *);
PMDA_CALL extern int pmdaEventQueueClients(int, pmAtomValue *);
PMDA_CALL extern int pmdaEventQueueCounter(int, pmAtomValue *);
PMDA_CALL extern int pmdaEventQueueBytes(int, pmAtomValue *);
PMDA_CALL extern int pmdaEventQueueMemory(int, pmAtomValue *);
typedef int (*pmdaEventDecodeCallBack)(int,
void *, size_t, struct timeval *, void *);
PMDA_CALL extern int pmdaEventQueueRecords(int, pmAtomValue *, int,
pmdaEventDecodeCallBack, void *);
PMDA_CALL extern int pmdaEventNewClient(int);
PMDA_CALL extern int pmdaEventEndClient(int);
PMDA_CALL extern int pmdaEventClients(pmAtomValue *);
typedef int (*pmdaEventApplyFilterCallBack)(void *, void *, size_t);
typedef void (*pmdaEventReleaseFilterCallBack)(void *);
PMDA_CALL extern int pmdaEventSetFilter(int, int, void *,
pmdaEventApplyFilterCallBack, pmdaEventReleaseFilterCallBack);
PMDA_CALL extern int pmdaEventSetAccess(int, int, int);
PMDA_CALL extern char *__pmdaEventPrint(const char *, int, char *, int);
PMDA_CALL extern void pmdaInterfaceMoved(pmdaInterface *);
/*
* Privileged PMDA services, as offered by pmdaroot(1).
*/
PMDA_CALL extern int pmdaRootConnect(const char *);
PMDA_CALL extern void pmdaRootShutdown(int);
PMDA_CALL extern int pmdaRootContainerHostName(int, const char *, int, char *, int);
PMDA_CALL extern int pmdaRootContainerProcessID(int, const char *, int);
PMDA_CALL extern int pmdaRootContainerCGroupName(int, const char *, int, char *, int);
PMDA_CALL extern int pmdaRootProcessStart(int, int, const char *, int labellen,
const char *, int, int *, int *, int *);
PMDA_CALL extern int pmdaRootProcessWait(int, int, int *);
PMDA_CALL extern int pmdaRootProcessTerminate(int, int);
#ifdef __cplusplus
}
#endif
#endif /* PCP_PMDA_H */
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