/usr/include/libzfs/sys/trace_txg.h is in libzfslinux-dev 0.6.5.6-0ubuntu8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* 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 http://www.opensolaris.org/os/licensing.
* 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) && defined(HAVE_DECLARE_EVENT_CLASS)
#undef TRACE_SYSTEM
#define TRACE_SYSTEM zfs
#undef TRACE_SYSTEM_VAR
#define TRACE_SYSTEM_VAR zfs_txg
#if !defined(_TRACE_TXG_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_TXG_H
#include <linux/tracepoint.h>
#include <sys/types.h>
/*
* Generic support for two argument tracepoints of the form:
*
* DTRACE_PROBE2(...,
* dsl_pool_t *, ...,
* uint64_t, ...);
*/
DECLARE_EVENT_CLASS(zfs_txg_class,
TP_PROTO(dsl_pool_t *dp, uint64_t txg),
TP_ARGS(dp, txg),
TP_STRUCT__entry(
__field(uint64_t, txg)
),
TP_fast_assign(
__entry->txg = txg;
),
TP_printk("txg %llu", __entry->txg)
);
#define DEFINE_TXG_EVENT(name) \
DEFINE_EVENT(zfs_txg_class, name, \
TP_PROTO(dsl_pool_t *dp, uint64_t txg), \
TP_ARGS(dp, txg))
DEFINE_TXG_EVENT(zfs_dsl_pool_sync__done);
DEFINE_TXG_EVENT(zfs_txg__quiescing);
DEFINE_TXG_EVENT(zfs_txg__opened);
DEFINE_TXG_EVENT(zfs_txg__syncing);
DEFINE_TXG_EVENT(zfs_txg__synced);
DEFINE_TXG_EVENT(zfs_txg__quiesced);
#endif /* _TRACE_TXG_H */
#undef TRACE_INCLUDE_PATH
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_PATH sys
#define TRACE_INCLUDE_FILE trace_txg
#include <trace/define_trace.h>
#endif /* _KERNEL && HAVE_DECLARE_EVENT_CLASS */
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