FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/os/linux/zfs/sys/trace_dbgmsg.h

     /*
      * CDDL HEADER START
      *
      * The contents of this file are subject to the terms of the
      * Common Development and Distribution License (the "License").
      * You may not use this file except in compliance with the License.
      *
      * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      * or https://opensource.org/licenses/CDDL-1.0.
     * See the License for the specific language governing permissions
     * and limitations under the License.
     *
     * When distributing Covered Code, include this CDDL HEADER in each
     * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     * If applicable, add the following below this CDDL HEADER, with the
     * fields enclosed by brackets "[]" replaced with your own identifying
     * information: Portions Copyright [yyyy] [name of copyright owner]
     *
     * CDDL HEADER END
     */
    
    #if defined(_KERNEL)
    #if defined(HAVE_DECLARE_EVENT_CLASS)
    
    #undef TRACE_SYSTEM
    #define TRACE_SYSTEM zfs
    
    #undef TRACE_SYSTEM_VAR
    #define TRACE_SYSTEM_VAR zfs_dbgmsg
    
    #if !defined(_TRACE_DBGMSG_H) || defined(TRACE_HEADER_MULTI_READ)
    #define _TRACE_DBGMSG_H
    
    #include <linux/tracepoint.h>
    
    /*
     * This file defines tracepoint events for use by the dbgmsg(),
     * dprintf(), and SET_ERROR() interfaces. These are grouped here because
     * they all provide a way to store simple messages in the debug log (as
     * opposed to events used by the DTRACE_PROBE interfaces which typically
     * dump structured data).
     *
     * This header is included inside the trace.h multiple inclusion guard,
     * and it is guarded above against direct inclusion, so it and need not
     * be guarded separately.
     */
    
    /*
     * Generic support for one argument tracepoints of the form:
     *
     * DTRACE_PROBE1(...,
     *     const char *, ...);
     */
    /* BEGIN CSTYLED */
    DECLARE_EVENT_CLASS(zfs_dprintf_class,
            TP_PROTO(const char *msg),
            TP_ARGS(msg),
            TP_STRUCT__entry(
                __string(msg, msg)
            ),
            TP_fast_assign(
                __assign_str(msg, msg);
            ),
            TP_printk("%s", __get_str(msg))
    );
    /* END CSTYLED */
    
    #define DEFINE_DPRINTF_EVENT(name) \
    DEFINE_EVENT(zfs_dprintf_class, name, \
        TP_PROTO(const char *msg), \
        TP_ARGS(msg))
    DEFINE_DPRINTF_EVENT(zfs_zfs__dprintf);
    
    #endif /* _TRACE_DBGMSG_H */
    
    #undef TRACE_INCLUDE_PATH
    #undef TRACE_INCLUDE_FILE
    #define TRACE_INCLUDE_PATH sys
    #define TRACE_INCLUDE_FILE trace_dbgmsg
    #include <trace/define_trace.h>
    
    #else
    
    DEFINE_DTRACE_PROBE1(zfs__dprintf);
    
    #endif /* HAVE_DECLARE_EVENT_CLASS */
    #endif /* _KERNEL */

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