zfs/include/sys/trace_dbuf.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) && defined(HAVE_DECLARE_EVENT_CLASS)
  23
  24 #undef TRACE_SYSTEM
  25 #define TRACE_SYSTEM zfs
  26
  27 #undef TRACE_SYSTEM_VAR
  28 #define TRACE_SYSTEM_VAR zfs_dbuf
  29
  30 #if !defined(_TRACE_DBUF_H) || defined(TRACE_HEADER_MULTI_READ)
  31 #define _TRACE_DBUF_H
  32
  33 #include <linux/tracepoint.h>
  34 #include <sys/types.h>
  35
  36 /*
  37  * Generic support for two argument tracepoints of the form:
  38  *
  39  * DTRACE_PROBE2(...,
  40  *     dmu_buf_impl_t *, ...,
  41  *     zio_t *, ...);
  42  */
  43
  44 #define DBUF_TP_STRUCT_ENTRY                                    \
  45         __field(const char *,   os_spa)                         \
  46         __field(uint64_t,       ds_object)                      \
  47         __field(uint64_t,       db_object)                      \
  48         __field(uint64_t,       db_level)                       \
  49         __field(uint64_t,       db_blkid)                       \
  50         __field(uint64_t,       db_offset)                      \
  51         __field(uint64_t,       db_size)                        \
  52         __field(uint64_t,       db_state)                       \
  53         __field(int64_t,        db_holds)                       \
  54
  55 #define DBUF_TP_FAST_ASSIGN                                     \
  56         __entry->os_spa =                                       \
  57             spa_name(DB_DNODE(db)->dn_objset->os_spa);          \
  58                                                                 \
  59         __entry->ds_object = db->db_objset->os_dsl_dataset ?    \
  60             db->db_objset->os_dsl_dataset->ds_object : 0;       \
  61                                                                 \
  62         __entry->db_object = db->db.db_object;                  \
  63         __entry->db_level  = db->db_level;                      \
  64         __entry->db_blkid  = db->db_blkid;                      \
  65         __entry->db_offset = db->db.db_offset;                  \
  66         __entry->db_size   = db->db.db_size;                    \
  67         __entry->db_state  = db->db_state;                      \
  68         __entry->db_holds  = refcount_count(&db->db_holds);
  69
  70 #define DBUF_TP_PRINTK_FMT                                              \
  71         "dbuf { spa \"%s\" objset %llu object %llu level %llu "         \
  72         "blkid %llu offset %llu size %llu state %llu holds %lld }"
  73
  74 #define DBUF_TP_PRINTK_ARGS                                     \
  75         __entry->os_spa, __entry->ds_object,                    \
  76         __entry->db_object, __entry->db_level,                  \
  77         __entry->db_blkid, __entry->db_offset,                  \
  78         __entry->db_size, __entry->db_state, __entry->db_holds
  79
  80 DECLARE_EVENT_CLASS(zfs_dbuf_class,
  81         TP_PROTO(dmu_buf_impl_t *db, zio_t *zio),
  82         TP_ARGS(db, zio),
  83         TP_STRUCT__entry(DBUF_TP_STRUCT_ENTRY),
  84         TP_fast_assign(DBUF_TP_FAST_ASSIGN),
  85         TP_printk(DBUF_TP_PRINTK_FMT, DBUF_TP_PRINTK_ARGS)
  86 );
  87
  88 #define DEFINE_DBUF_EVENT(name) \
  89 DEFINE_EVENT(zfs_dbuf_class, name, \
  90         TP_PROTO(dmu_buf_impl_t *db, zio_t *zio), \
  91         TP_ARGS(db, zio))
  92 DEFINE_DBUF_EVENT(zfs_blocked__read);
  93
  94 #endif /* _TRACE_DBUF_H */
  95
  96 #undef TRACE_INCLUDE_PATH
  97 #undef TRACE_INCLUDE_FILE
  98 #define TRACE_INCLUDE_PATH sys
  99 #define TRACE_INCLUDE_FILE trace_dbuf
 100 #include <trace/define_trace.h>
 101
 102 #endif /* _KERNEL && HAVE_DECLARE_EVENT_CLASS */