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cb70964221
ZFS tracing efforts are hampered by the inability to access zfs static probes(probes using DTRACE_PROBE macros). The probes are available via tracepoints for GPL modules only. The build could be modified to generate a function for each unique DTRACE_PROBE invocation. These could be then accessed via kprobes. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Matt Ahrens <matt@delphix.com> Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com> Signed-off-by: Brad Lewis <brad.lewis@delphix.com> Closes #8659 Closes #8663
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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#include <sys/list.h>
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#if defined(_KERNEL)
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#if defined(HAVE_DECLARE_EVENT_CLASS)
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM zfs
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#undef TRACE_SYSTEM_VAR
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#define TRACE_SYSTEM_VAR zfs_zio
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#if !defined(_TRACE_ZIO_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_ZIO_H
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#include <linux/tracepoint.h>
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#include <sys/types.h>
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#include <sys/trace_common.h> /* For ZIO macros */
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/* BEGIN CSTYLED */
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TRACE_EVENT(zfs_zio__delay__miss,
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TP_PROTO(zio_t *zio, hrtime_t now),
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TP_ARGS(zio, now),
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TP_STRUCT__entry(
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ZIO_TP_STRUCT_ENTRY
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__field(hrtime_t, now)
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),
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TP_fast_assign(
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ZIO_TP_FAST_ASSIGN
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__entry->now = now;
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),
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TP_printk("now %llu " ZIO_TP_PRINTK_FMT, __entry->now,
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ZIO_TP_PRINTK_ARGS)
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);
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TRACE_EVENT(zfs_zio__delay__hit,
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TP_PROTO(zio_t *zio, hrtime_t now, hrtime_t diff),
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TP_ARGS(zio, now, diff),
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TP_STRUCT__entry(
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ZIO_TP_STRUCT_ENTRY
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__field(hrtime_t, now)
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__field(hrtime_t, diff)
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),
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TP_fast_assign(
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ZIO_TP_FAST_ASSIGN
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__entry->now = now;
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__entry->diff = diff;
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),
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TP_printk("now %llu diff %llu " ZIO_TP_PRINTK_FMT, __entry->now,
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__entry->diff, ZIO_TP_PRINTK_ARGS)
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);
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TRACE_EVENT(zfs_zio__delay__skip,
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TP_PROTO(zio_t *zio),
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TP_ARGS(zio),
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TP_STRUCT__entry(ZIO_TP_STRUCT_ENTRY),
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TP_fast_assign(ZIO_TP_FAST_ASSIGN),
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TP_printk(ZIO_TP_PRINTK_FMT, ZIO_TP_PRINTK_ARGS)
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);
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/* END CSTYLED */
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#endif /* _TRACE_ZIO_H */
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#undef TRACE_INCLUDE_PATH
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_PATH sys
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#define TRACE_INCLUDE_FILE trace_zio
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#include <trace/define_trace.h>
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#else
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DEFINE_DTRACE_PROBE2(zio__delay__miss);
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DEFINE_DTRACE_PROBE3(zio__delay__hit);
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DEFINE_DTRACE_PROBE1(zio__delay__skip);
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#endif /* HAVE_DECLARE_EVENT_CLASS */
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#endif /* _KERNEL */
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