include/os/linux/zfs/sys/trace_zrlock.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 #if defined(_KERNEL)
  23 #if defined(HAVE_DECLARE_EVENT_CLASS)
  24
  25 #undef TRACE_SYSTEM
  26 #define TRACE_SYSTEM zfs
  27
  28 #undef TRACE_SYSTEM_VAR
  29 #define TRACE_SYSTEM_VAR zfs_zrlock
  30
  31 #if !defined(_TRACE_ZRLOCK_H) || defined(TRACE_HEADER_MULTI_READ)
  32 #define _TRACE_ZRLOCK_H
  33
  34 #include <linux/tracepoint.h>
  35 #include <sys/types.h>
  36
  37 /*
  38  * Generic support for two argument tracepoints of the form:
  39  *
  40  * DTRACE_PROBE2(...,
  41  *     zrlock_t *, ...,
  42  *     uint32_t, ...);
  43  */
  44 /* BEGIN CSTYLED */
  45 DECLARE_EVENT_CLASS(zfs_zrlock_class,
  46         TP_PROTO(zrlock_t *zrl, kthread_t *owner, uint32_t n),
  47         TP_ARGS(zrl, owner, n),
  48         TP_STRUCT__entry(
  49             __field(int32_t,            refcount)
  50 #ifdef  ZFS_DEBUG
  51             __field(pid_t,              owner_pid)
  52             __field(const char *,       caller)
  53 #endif
  54             __field(uint32_t,           n)
  55         ),
  56         TP_fast_assign(
  57             __entry->refcount   = zrl->zr_refcount;
  58 #ifdef  ZFS_DEBUG
  59             __entry->owner_pid  = owner ? owner->pid : 0;
  60             __entry->caller = zrl->zr_caller ? zrl->zr_caller : "(null)";
  61 #endif
  62             __entry->n          = n;
  63         ),
  64 #ifdef  ZFS_DEBUG
  65         TP_printk("zrl { refcount %d owner_pid %d caller %s } n %u",
  66             __entry->refcount, __entry->owner_pid, __entry->caller,
  67             __entry->n)
  68 #else
  69         TP_printk("zrl { refcount %d } n %u",
  70             __entry->refcount, __entry->n)
  71 #endif
  72 );
  73 /* END_CSTYLED */
  74
  75 #define DEFINE_ZRLOCK_EVENT(name) \
  76 DEFINE_EVENT(zfs_zrlock_class, name, \
  77         TP_PROTO(zrlock_t *zrl, kthread_t *owner, uint32_t n), \
  78         TP_ARGS(zrl, owner, n))
  79 DEFINE_ZRLOCK_EVENT(zfs_zrlock__reentry);
  80
  81 #endif /* _TRACE_ZRLOCK_H */
  82
  83 #undef TRACE_INCLUDE_PATH
  84 #undef TRACE_INCLUDE_FILE
  85 #define TRACE_INCLUDE_PATH sys
  86 #define TRACE_INCLUDE_FILE trace_zrlock
  87 #include <trace/define_trace.h>
  88
  89 #else
  90
  91 DEFINE_DTRACE_PROBE3(zrlock__reentry);
  92
  93 #endif /* HAVE_DECLARE_EVENT_CLASS */
  94 #endif /* _KERNEL */