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