7b0a665d72
Add boottrace annotations to record events in init(8), shutdown(8), and reboot(8). Sponsored by: NetApp, Inc. Sponsored by: Klara, Inc. X-NetApp-PR: #23 Differential Revision: https://reviews.freebsd.org/D31928
94 lines
3.1 KiB
C
94 lines
3.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2008-2022 NetApp, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SYS_BOOTTRACE_H_
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#define _SYS_BOOTTRACE_H_
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#define _BOOTTRACE_BOOTTRACE "kern.boottrace.boottrace"
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#define _BOOTTRACE_RUNTRACE "kern.boottrace.runtrace"
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#define _BOOTTRACE_SHUTTRACE "kern.boottrace.shuttrace"
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/* Messages are formatted as 'tdname:name' */
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#define BT_EVENT_TDNAMELEN 24
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#define BT_EVENT_NAMELEN 40
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#define BT_MSGLEN (BT_EVENT_NAMELEN + 1 + BT_EVENT_TDNAMELEN)
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#ifndef _KERNEL
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/sysctl.h>
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/*
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* Convenience macros. Userland API.
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*/
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#define BOOTTRACE(...) _boottrace(_BOOTTRACE_BOOTTRACE, __VA_ARGS__)
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#define RUNTRACE(...) _boottrace(_BOOTTRACE_RUNTRACE, __VA_ARGS__)
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#define SHUTTRACE(...) _boottrace(_BOOTTRACE_SHUTTRACE, __VA_ARGS__)
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/*
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* Call the requested boottrace sysctl with provided va-formatted message.
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*/
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static __inline void
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_boottrace(const char *sysctlname, const char *fmt, ...)
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{
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va_list ap;
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char msg[BT_MSGLEN];
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int len;
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va_start(ap, fmt);
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len = vsnprintf(msg, sizeof(msg), fmt, ap);
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va_end(ap);
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/* Log the event, even if truncated. */
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if (len >= 0)
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(void)sysctlbyname(sysctlname, NULL, NULL, msg, strlen(msg));
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}
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#else /* _KERNEL */
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/*
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* Convenience macros. Kernel API.
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*/
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#define _BOOTTRACE(tdname, ...) do { \
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if (boottrace_enabled) \
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(void)boottrace(tdname, __VA_ARGS__); \
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} while (0)
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#define BOOTTRACE(...) _BOOTTRACE(NULL, __VA_ARGS__)
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#define BOOTTRACE_INIT(...) _BOOTTRACE("kernel", __VA_ARGS__)
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extern bool boottrace_enabled;
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extern bool shutdown_trace;
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int boottrace(const char *_tdname, const char *_eventfmt, ...)
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__printflike(2,3);
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void boottrace_reset(const char *_actor);
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int boottrace_resize(u_int _newsize);
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void boottrace_dump_console(void);
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#endif /* _KERNEL */
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#endif /* _SYS_BOOTTRACE_H_ */
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