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7f747a0d73
Add log/debug_classes to lvm.conf to allow debug messages to be classified and filtered at runtime. The dm_errno field is only used by log_error(), so I've redefined it for log_debug() messages to hold the message class. By default, all existing messages appear, but we can add categories that generate high volumes of data, such as logging all traffic to/from lvmetad.
116 lines
4.9 KiB
C
116 lines
4.9 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LVM_LOG_H
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#define _LVM_LOG_H
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/*
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* printf()-style macros to use for messages:
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*
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* log_error - always print to stderr.
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* log_print - always print to stdout. Use this instead of printf.
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* log_verbose - print to stdout if verbose is set (-v)
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* log_very_verbose - print to stdout if verbose is set twice (-vv)
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* log_debug - print to stdout if verbose is set three times (-vvv)
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*
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* In addition, messages will be logged to file or syslog if they
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* are more serious than the log level specified with the log/debug_level
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* parameter in the configuration file. These messages get the file
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* and line number prepended. 'stack' (without arguments) can be used
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* to log this information at debug level.
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*
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* log_sys_error and log_sys_very_verbose are for errors from system calls
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* e.g. log_sys_error("stat", filename);
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* /dev/fd/7: stat failed: No such file or directory
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*
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*/
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#include <stdio.h> /* FILE */
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#include <string.h> /* strerror() */
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#include <errno.h>
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#define EUNCLASSIFIED -1 /* Generic error code */
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#define _LOG_STDERR 128 /* force things to go to stderr, even if loglevel
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would make them go to stdout */
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#define _LOG_ONCE 256 /* downgrade to NOTICE if this has been already logged */
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#define _LOG_DEBUG 7
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#define _LOG_INFO 6
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#define _LOG_NOTICE 5
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#define _LOG_WARN 4
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#define _LOG_ERR 3
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#define _LOG_FATAL 2
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#define INTERNAL_ERROR "Internal error: "
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/*
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* Classes available for debug log messages.
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* These are also listed in doc/example.conf
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* and lib/commands/toolcontext.c:_parse_debug_classes()
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*/
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#define LOG_CLASS_MEM 0x0001 /* "memory" */
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#define LOG_CLASS_DEVS 0x0002 /* "devices" */
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#define LOG_CLASS_ACTIVATION 0x0004 /* "activation" */
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#define LOG_CLASS_ALLOC 0x0008 /* "allocation" */
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#define LOG_CLASS_LVMETAD 0x0010 /* "lvmetad" */
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#define LOG_CLASS_METADATA 0x0020 /* "metadata" */
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#define LOG_CLASS_CACHE 0x0040 /* "cache" */
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#define LOG_CLASS_LOCKING 0x0080 /* "locking" */
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#define log_debug(x...) LOG_LINE(_LOG_DEBUG, x)
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#define log_debug_mem(x...) LOG_LINE_WITH_CLASS(_LOG_DEBUG, LOG_CLASS_MEM, x)
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#define log_debug_devs(x...) LOG_LINE_WITH_CLASS(_LOG_DEBUG, LOG_CLASS_DEVS, x)
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#define log_debug_activation(x...) LOG_LINE_WITH_CLASS(_LOG_DEBUG, LOG_CLASS_ACTIVATION, x)
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#define log_debug_alloc(x...) LOG_LINE_WITH_CLASS(_LOG_DEBUG, LOG_CLASS_ALLOC, x)
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#define log_debug_lvmetad(x...) LOG_LINE_WITH_CLASS(_LOG_DEBUG, LOG_CLASS_LVMETAD, x)
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#define log_debug_metadata(x...) LOG_LINE_WITH_CLASS(_LOG_DEBUG, LOG_CLASS_METADATA, x)
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#define log_debug_cache(x...) LOG_LINE_WITH_CLASS(_LOG_DEBUG, LOG_CLASS_CACHE, x)
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#define log_debug_locking(x...) LOG_LINE_WITH_CLASS(_LOG_DEBUG, LOG_CLASS_LOCKING, x)
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#define log_info(x...) LOG_LINE(_LOG_INFO, x)
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#define log_notice(x...) LOG_LINE(_LOG_NOTICE, x)
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#define log_warn(x...) LOG_LINE(_LOG_WARN | _LOG_STDERR, x)
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#define log_warn_suppress(s, x...) LOG_LINE(s ? _LOG_NOTICE : _LOG_WARN | _LOG_STDERR, x)
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#define log_err(x...) LOG_LINE_WITH_ERRNO(_LOG_ERR, EUNCLASSIFIED, x)
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#define log_err_suppress(s, x...) LOG_LINE_WITH_ERRNO(s ? _LOG_NOTICE : _LOG_ERR, EUNCLASSIFIED, x)
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#define log_err_once(x...) LOG_LINE_WITH_ERRNO(_LOG_ERR | _LOG_ONCE, EUNCLASSIFIED, x)
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#define log_fatal(x...) LOG_LINE_WITH_ERRNO(_LOG_FATAL, EUNCLASSIFIED, x)
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#define stack log_debug("<backtrace>") /* Backtrace on error */
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#define log_very_verbose(args...) log_info(args)
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#define log_verbose(args...) log_notice(args)
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#define log_print(args...) LOG_LINE(_LOG_WARN, args)
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#define log_print_unless_silent(args...) LOG_LINE(silent_mode() ? _LOG_NOTICE : _LOG_WARN, args)
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#define log_error(args...) log_err(args)
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#define log_error_suppress(s, args...) log_err_suppress(s, args)
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#define log_error_once(args...) log_err_once(args)
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#define log_errno(args...) LOG_LINE_WITH_ERRNO(_LOG_ERR, args)
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/* System call equivalents */
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#define log_sys_error(x, y) \
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log_err("%s: %s failed: %s", y, x, strerror(errno))
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#define log_sys_error_suppress(s, x, y) \
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log_err_suppress(s, "%s: %s failed: %s", y, x, strerror(errno))
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#define log_sys_very_verbose(x, y) \
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log_info("%s: %s failed: %s", y, x, strerror(errno))
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#define log_sys_debug(x, y) \
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log_debug("%s: %s failed: %s", y, x, strerror(errno))
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#define return_0 do { stack; return 0; } while (0)
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#define return_NULL do { stack; return NULL; } while (0)
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#define goto_out do { stack; goto out; } while (0)
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#define goto_bad do { stack; goto bad; } while (0)
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#endif
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