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6af26273cb
Introduce macros: log_level(), log_stderr(), log_once(), log_bypass_report() For easier and more consisten way how to 'decoder' bits of info from passed 'level'. This patch fixes potential problem when 'level' of message might not have always masked right bits.
126 lines
5.7 KiB
C
126 lines
5.7 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 <errno.h>
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#define EUNCLASSIFIED -1 /* Generic error code */
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#define _LOG_FATAL 0x0002
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#define _LOG_ERR 0x0003
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#define _LOG_WARN 0x0004
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#define _LOG_NOTICE 0x0005
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#define _LOG_INFO 0x0006
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#define _LOG_DEBUG 0x0007
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#define _LOG_STDERR 0x0080 /* force things to go to stderr, even if loglevel would make them go to stdout */
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#define _LOG_ONCE 0x0100 /* downgrade to NOTICE if this has been already logged */
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#define _LOG_BYPASS_REPORT 0x0200 /* do not log through report even if report available */
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#define log_level(x) ((x) & 0x0f) /* obtain message level */
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#define log_stderr(x) ((x) & _LOG_STDERR) /* obtain stderr bit */
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#define log_once(x) ((x) & _LOG_ONCE) /* obtain once bit */
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#define log_bypass_report(x) ((x) & _LOG_BYPASS_REPORT)/* obtain bypass bit */
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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_CLASS_LVMPOLLD 0x0100 /* "lvmpolld" */
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#define LOG_CLASS_DBUS 0x0200 /* "dbus" */
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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_debug_lvmpolld(x...) LOG_LINE_WITH_CLASS(_LOG_DEBUG, LOG_CLASS_LVMPOLLD, x)
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#define log_debug_dbus(x...) LOG_LINE_WITH_CLASS(_LOG_DEBUG, LOG_CLASS_DBUS, 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%s failed: %s", y, *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%s failed: %s", y, *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 return_EINVALID_CMD_LINE \
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do { stack; return EINVALID_CMD_LINE; } while (0)
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#define return_ECMD_FAILED do { stack; return ECMD_FAILED; } 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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