/* * virlog.h: internal logging and debugging * * Copyright (C) 2006-2008, 2011-2012 Red Hat, Inc. * * 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. * * You should have received a copy of the GNU Lesser General Public * License along with this library. If not, see * . * */ #ifndef LIBVIRT_VIRLOG_H # define LIBVIRT_VIRLOG_H # include "internal.h" # include "virbuffer.h" # ifdef PACKAGER_VERSION # ifdef PACKAGER # define VIR_LOG_VERSION_STRING \ "libvirt version: " VERSION ", package: " PACKAGER_VERSION " (" PACKAGER ")" # else # define VIR_LOG_VERSION_STRING \ "libvirt version: " VERSION ", package: " PACKAGER_VERSION # endif # else # define VIR_LOG_VERSION_STRING \ "libvirt version: " VERSION # endif /* * To be made public */ typedef enum { VIR_LOG_DEBUG = 1, VIR_LOG_INFO, VIR_LOG_WARN, VIR_LOG_ERROR, } virLogPriority; # define VIR_LOG_DEFAULT VIR_LOG_WARN typedef enum { VIR_LOG_TO_STDERR = 0, VIR_LOG_TO_SYSLOG, VIR_LOG_TO_FILE, VIR_LOG_TO_JOURNALD, VIR_LOG_TO_OUTPUT_LAST, } virLogDestination; typedef struct _virLogSource virLogSource; typedef virLogSource *virLogSourcePtr; struct _virLogSource { const char *name; unsigned int priority; unsigned int serial; unsigned int flags; }; /* * ATTRIBUTE_UNUSED is to make gcc keep quiet if all the * log statements in a file are conditionally disabled * at compile time due to configure options. */ # define VIR_LOG_INIT(n) \ static ATTRIBUTE_UNUSED virLogSource virLogSelf = { \ .name = "" n "", \ .priority = VIR_LOG_ERROR, \ .serial = 0, \ .flags = 0, \ } /* * If configured with --enable-debug=yes then library calls * are printed to stderr for debugging or to an appropriate channel * defined at runtime from the libvirt daemon configuration file */ # ifdef ENABLE_DEBUG # define VIR_DEBUG_INT(src, filename, linenr, funcname, ...) \ virLogMessage(src, VIR_LOG_DEBUG, filename, linenr, funcname, NULL, __VA_ARGS__) # else /** * virLogEatParams: * * Do nothing but eat parameters. */ static inline void virLogEatParams(virLogSourcePtr unused, ...) { /* Silence gcc */ unused = unused; } # define VIR_DEBUG_INT(src, filename, linenr, funcname, ...) \ virLogEatParams(src, filename, linenr, funcname, __VA_ARGS__) # endif /* !ENABLE_DEBUG */ # define VIR_INFO_INT(src, filename, linenr, funcname, ...) \ virLogMessage(src, VIR_LOG_INFO, filename, linenr, funcname, NULL, __VA_ARGS__) # define VIR_WARN_INT(src, filename, linenr, funcname, ...) \ virLogMessage(src, VIR_LOG_WARN, filename, linenr, funcname, NULL, __VA_ARGS__) # define VIR_ERROR_INT(src, filename, linenr, funcname, ...) \ virLogMessage(src, VIR_LOG_ERROR, filename, linenr, funcname, NULL, __VA_ARGS__) # define VIR_DEBUG(...) \ VIR_DEBUG_INT(&virLogSelf, __FILE__, __LINE__, __func__, __VA_ARGS__) # define VIR_INFO(...) \ VIR_INFO_INT(&virLogSelf, __FILE__, __LINE__, __func__, __VA_ARGS__) # define VIR_WARN(...) \ VIR_WARN_INT(&virLogSelf, __FILE__, __LINE__, __func__, __VA_ARGS__) # define VIR_ERROR(...) \ VIR_ERROR_INT(&virLogSelf, __FILE__, __LINE__, __func__, __VA_ARGS__) struct _virLogMetadata { const char *key; const char *s; /* String value, or NULL to use "i" */ int iv; }; typedef struct _virLogMetadata virLogMetadata; typedef struct _virLogMetadata *virLogMetadataPtr; typedef struct _virLogOutput virLogOutput; typedef virLogOutput *virLogOutputPtr; typedef struct _virLogFilter virLogFilter; typedef virLogFilter *virLogFilterPtr; /** * virLogOutputFunc: * @src: the source of the log message * @priority: the priority for the message * @filename: file where the message was emitted * @linenr: line where the message was emitted * @funcname: the function emitting the message * @timestamp: zero terminated string with timestamp of the message * @metadata: NULL or metadata array, terminated by an item with NULL key * @flags: flags associated with the message * @rawstr: the unformatted message to log, zero terminated * @str: the message to log, preformatted and zero terminated * @data: extra output logging data * * Callback function used to output messages */ typedef void (*virLogOutputFunc) (virLogSourcePtr src, virLogPriority priority, const char *filename, int linenr, const char *funcname, const char *timestamp, virLogMetadataPtr metadata, unsigned int flags, const char *rawstr, const char *str, void *data); /** * virLogCloseFunc: * @data: extra output logging data * * Callback function used to close a log output */ typedef void (*virLogCloseFunc) (void *data); typedef enum { VIR_LOG_STACK_TRACE = (1 << 0), } virLogFilterFlags; int virLogGetNbFilters(void); int virLogGetNbOutputs(void); char *virLogGetFilters(void); char *virLogGetOutputs(void); virLogPriority virLogGetDefaultPriority(void); int virLogSetDefaultPriority(virLogPriority priority); void virLogSetFromEnv(void); void virLogOutputFree(virLogOutputPtr output); void virLogOutputListFree(virLogOutputPtr *list, int count); void virLogFilterFree(virLogFilterPtr filter); void virLogFilterListFree(virLogFilterPtr *list, int count); int virLogSetOutputs(const char *outputs); int virLogSetFilters(const char *filters); char *virLogGetDefaultOutput(void); int virLogSetDefaultOutput(const char *fname, bool godaemon, bool privileged); /* * Internal logging API */ void virLogLock(void); void virLogUnlock(void); int virLogReset(void); int virLogParseDefaultPriority(const char *priority); int virLogPriorityFromSyslog(int priority); void virLogMessage(virLogSourcePtr source, virLogPriority priority, const char *filename, int linenr, const char *funcname, virLogMetadataPtr metadata, const char *fmt, ...) ATTRIBUTE_FMT_PRINTF(7, 8); void virLogVMessage(virLogSourcePtr source, virLogPriority priority, const char *filename, int linenr, const char *funcname, virLogMetadataPtr metadata, const char *fmt, va_list vargs) ATTRIBUTE_FMT_PRINTF(7, 0); bool virLogProbablyLogMessage(const char *str); virLogOutputPtr virLogOutputNew(virLogOutputFunc f, virLogCloseFunc c, void *data, virLogPriority priority, virLogDestination dest, const char *name) ATTRIBUTE_NONNULL(1); virLogFilterPtr virLogFilterNew(const char *match, virLogPriority priority, unsigned int flags) ATTRIBUTE_NONNULL(1); int virLogFindOutput(virLogOutputPtr *outputs, size_t noutputs, virLogDestination dest, const void *opaque); int virLogDefineOutputs(virLogOutputPtr *outputs, size_t noutputs) ATTRIBUTE_NONNULL(1); int virLogDefineFilters(virLogFilterPtr *filters, size_t nfilters); virLogOutputPtr virLogParseOutput(const char *src) ATTRIBUTE_NONNULL(1); virLogFilterPtr virLogParseFilter(const char *src) ATTRIBUTE_NONNULL(1); int virLogParseOutputs(const char *src, virLogOutputPtr **outputs) ATTRIBUTE_NONNULL(1); int virLogParseFilters(const char *src, virLogFilterPtr **filters) ATTRIBUTE_NONNULL(1); #endif /* LIBVIRT_VIRLOG_H */