include/os/linux/zfs/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)
  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_dbuf
  30
  31 #if !defined(_TRACE_DBUF_H) || defined(TRACE_HEADER_MULTI_READ)
  32 #define _TRACE_DBUF_H
  33
  34 #include <linux/tracepoint.h>
  35 #include <sys/types.h>
  36
  37 #ifndef TRACE_DBUF_MSG_MAX
  38 #define TRACE_DBUF_MSG_MAX      512
  39 #endif
  40
  41 /*
  42  * Generic support for two argument tracepoints of the form:
  43  *
  44  * DTRACE_PROBE2(...,
  45  *     dmu_buf_impl_t *, ...,
  46  *     zio_t *, ...);
  47  */
  48
  49 #define DBUF_TP_STRUCT_ENTRY                                    \
  50         __dynamic_array(char,   os_spa, TRACE_DBUF_MSG_MAX)     \
  51         __field(uint64_t,       ds_object)                      \
  52         __field(uint64_t,       db_object)                      \
  53         __field(uint64_t,       db_level)                       \
  54         __field(uint64_t,       db_blkid)                       \
  55         __field(uint64_t,       db_offset)                      \
  56         __field(uint64_t,       db_size)                        \
  57         __field(uint64_t,       db_state)                       \
  58         __field(int64_t,        db_holds)                       \
  59         __dynamic_array(char,   msg,    TRACE_DBUF_MSG_MAX)
  60
  61 #define DBUF_TP_FAST_ASSIGN                                             \
  62         if (db != NULL) {                                               \
  63                 __assign_str(os_spa,                                    \
  64                 spa_name(DB_DNODE(db)->dn_objset->os_spa));             \
  65                                                                         \
  66                 __entry->ds_object = db->db_objset->os_dsl_dataset ?    \
  67                 db->db_objset->os_dsl_dataset->ds_object : 0;           \
  68                                                                         \
  69                 __entry->db_object = db->db.db_object;                  \
  70                 __entry->db_level  = db->db_level;                      \
  71                 __entry->db_blkid  = db->db_blkid;                      \
  72                 __entry->db_offset = db->db.db_offset;                  \
  73                 __entry->db_size   = db->db.db_size;                    \
  74                 __entry->db_state  = db->db_state;                      \
  75                 __entry->db_holds  = zfs_refcount_count(&db->db_holds); \
  76                 snprintf(__get_str(msg), TRACE_DBUF_MSG_MAX,            \
  77                     DBUF_TP_PRINTK_FMT, DBUF_TP_PRINTK_ARGS);           \
  78         } else {                                                        \
  79                 __assign_str(os_spa, "NULL")                            \
  80                 __entry->ds_object = 0;                                 \
  81                 __entry->db_object = 0;                                 \
  82                 __entry->db_level  = 0;                                 \
  83                 __entry->db_blkid  = 0;                                 \
  84                 __entry->db_offset = 0;                                 \
  85                 __entry->db_size   = 0;                                 \
  86                 __entry->db_state  = 0;                                 \
  87                 __entry->db_holds  = 0;                                 \
  88                 snprintf(__get_str(msg), TRACE_DBUF_MSG_MAX,            \
  89                     "dbuf { NULL }");                                   \
  90         }
  91
  92 #define DBUF_TP_PRINTK_FMT                                              \
  93         "dbuf { spa \"%s\" objset %llu object %llu level %llu "         \
  94         "blkid %llu offset %llu size %llu state %llu holds %lld }"
  95
  96 #define DBUF_TP_PRINTK_ARGS                                     \
  97         __get_str(os_spa), __entry->ds_object,                  \
  98         __entry->db_object, __entry->db_level,                  \
  99         __entry->db_blkid, __entry->db_offset,                  \
 100         __entry->db_size, __entry->db_state, __entry->db_holds
 101
 102 /* BEGIN CSTYLED */
 103 DECLARE_EVENT_CLASS(zfs_dbuf_class,
 104         TP_PROTO(dmu_buf_impl_t *db, zio_t *zio),
 105         TP_ARGS(db, zio),
 106         TP_STRUCT__entry(DBUF_TP_STRUCT_ENTRY),
 107         TP_fast_assign(DBUF_TP_FAST_ASSIGN),
 108         TP_printk("%s", __get_str(msg))
 109 );
 110
 111 DECLARE_EVENT_CLASS(zfs_dbuf_state_class,
 112         TP_PROTO(dmu_buf_impl_t *db, const char *why),
 113         TP_ARGS(db, why),
 114         TP_STRUCT__entry(DBUF_TP_STRUCT_ENTRY),
 115         TP_fast_assign(DBUF_TP_FAST_ASSIGN),
 116         TP_printk("%s", __get_str(msg))
 117 );
 118 /* END CSTYLED */
 119
 120 /* BEGIN CSTYLED */
 121 #define DEFINE_DBUF_EVENT(name) \
 122 DEFINE_EVENT(zfs_dbuf_class, name, \
 123         TP_PROTO(dmu_buf_impl_t *db, zio_t *zio), \
 124         TP_ARGS(db, zio))
 125 /* END CSTYLED */
 126 DEFINE_DBUF_EVENT(zfs_blocked__read);
 127
 128 /* BEGIN CSTYLED */
 129 #define DEFINE_DBUF_STATE_EVENT(name) \
 130 DEFINE_EVENT(zfs_dbuf_state_class, name, \
 131         TP_PROTO(dmu_buf_impl_t *db, const char *why), \
 132         TP_ARGS(db, why))
 133 /* END CSTYLED */
 134 DEFINE_DBUF_STATE_EVENT(zfs_dbuf__state_change);
 135
 136 /* BEGIN CSTYLED */
 137 DECLARE_EVENT_CLASS(zfs_dbuf_evict_one_class,
 138         TP_PROTO(dmu_buf_impl_t *db, multilist_sublist_t *mls),
 139         TP_ARGS(db, mls),
 140         TP_STRUCT__entry(DBUF_TP_STRUCT_ENTRY),
 141         TP_fast_assign(DBUF_TP_FAST_ASSIGN),
 142         TP_printk("%s", __get_str(msg))
 143 );
 144 /* END CSTYLED */
 145
 146 /* BEGIN CSTYLED */
 147 #define DEFINE_DBUF_EVICT_ONE_EVENT(name) \
 148 DEFINE_EVENT(zfs_dbuf_evict_one_class, name, \
 149         TP_PROTO(dmu_buf_impl_t *db, multilist_sublist_t *mls), \
 150         TP_ARGS(db, mls))
 151 /* END CSTYLED */
 152 DEFINE_DBUF_EVICT_ONE_EVENT(zfs_dbuf__evict__one);
 153
 154 #endif /* _TRACE_DBUF_H */
 155
 156 #undef TRACE_INCLUDE_PATH
 157 #undef TRACE_INCLUDE_FILE
 158 #define TRACE_INCLUDE_PATH sys
 159 #define TRACE_INCLUDE_FILE trace_dbuf
 160 #include <trace/define_trace.h>
 161
 162 #else
 163
 164 DEFINE_DTRACE_PROBE2(blocked__read);
 165 DEFINE_DTRACE_PROBE2(dbuf__evict__one);
 166 DEFINE_DTRACE_PROBE2(dbuf__state_change);
 167
 168 #endif /* HAVE_DECLARE_EVENT_CLASS */
 169 #endif /* _KERNEL */