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monitoring state of the logical volumes they are currently acting on. Until now, every time a logical volume has been changed by a dmeventd plugin, this plugin would have called back to dmeventd through the external FIFO mechanism. I am fairly sure this was superfluous, inefficient and possibly even dangerous.
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/*
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* Copyright (C) 2003-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004 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_CMDLIB_H
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#define _LVM_CMDLIB_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef _LVM_LOG_H
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typedef void (*lvm2_log_fn_t) (int level, const char *file, int line,
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int dm_errno, const char *message);
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#endif
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#define LVM2_LOG_SUPPRESS 0
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/* Logging levels */
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#define LVM2_LOG_FATAL 2
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#define LVM2_LOG_ERROR 3
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#define LVM2_LOG_PRINT 4
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#define LVM2_LOG_VERBOSE 5
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#define LVM2_LOG_VERY_VERBOSE 6
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#define LVM2_LOG_DEBUG 7
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/*
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* Define external function to replace the built-in logging function.
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* It receives output line-by-line.
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*
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* level is the logging level (see above)
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* file & line refer to the source code where the message originates.
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*/
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void lvm2_log_fn(lvm2_log_fn_t log_fn);
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/*
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* Initialise library.
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* Returns a handle so repeated use of lvm2_run is more efficient.
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*/
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void *lvm2_init(void);
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/*
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* Disable any dmeventd calls that the library may otherwise do. Useful to avoid
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* recursive calls from dmeventd to itself.
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*/
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void lvm2_disable_dmeventd_monitoring(void *handle);
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/*
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* Set log level (as above) if using built-in logging function.
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* Default is LVM2_LOG_PRINT. Use LVM2_LOG_SUPPRESS to suppress output.
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*/
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void lvm2_log_level(void *handle, int level);
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/*
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* Run an LVM2 command.
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* Use NULL handle if the call is a one-off and you don't want to bother
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* calling lvm2_init/lvm2_exit.
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*/
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int lvm2_run(void *handle, const char *cmdline);
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/* Release handle */
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void lvm2_exit(void *handle);
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#ifdef __cplusplus
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}
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#endif
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#endif
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