Imported Upstream version 0.6.4.2

[mirror_zfs-debian.git] / include / sys / trace_dbuf.h

diff --git a/include/sys/trace_dbuf.h b/include/sys/trace_dbuf.h
new file mode 100644 (file)
index 0000000..34bc74e
--- /dev/null
+++ b/include/sys/trace_dbuf.h
@@ -0,0 +1,99 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+#if defined(_KERNEL) && defined(HAVE_DECLARE_EVENT_CLASS)
+
+#undef TRACE_SYSTEM
+#define        TRACE_SYSTEM zfs
+
+#if !defined(_TRACE_DBUF_H) || defined(TRACE_HEADER_MULTI_READ)
+#define        _TRACE_DBUF_H
+
+#include <linux/tracepoint.h>
+#include <sys/types.h>
+
+/*
+ * Generic support for two argument tracepoints of the form:
+ *
+ * DTRACE_PROBE2(...,
+ *     dmu_buf_impl_t *, ...,
+ *     zio_t *, ...);
+ */
+
+#define        DBUF_TP_STRUCT_ENTRY                                    \
+       __field(const char *,   os_spa)                         \
+       __field(uint64_t,       ds_object)                      \
+       __field(uint64_t,       db_object)                      \
+       __field(uint64_t,       db_level)                       \
+       __field(uint64_t,       db_blkid)                       \
+       __field(uint64_t,       db_offset)                      \
+       __field(uint64_t,       db_size)                        \
+       __field(uint64_t,       db_state)                       \
+       __field(int64_t,        db_holds)                       \
+
+#define        DBUF_TP_FAST_ASSIGN                                     \
+       __entry->os_spa =                                       \
+           spa_name(DB_DNODE(db)->dn_objset->os_spa);          \
+                                                               \
+       __entry->ds_object = db->db_objset->os_dsl_dataset ?    \
+           db->db_objset->os_dsl_dataset->ds_object : 0;       \
+                                                               \
+       __entry->db_object = db->db.db_object;                  \
+       __entry->db_level  = db->db_level;                      \
+       __entry->db_blkid  = db->db_blkid;                      \
+       __entry->db_offset = db->db.db_offset;                  \
+       __entry->db_size   = db->db.db_size;                    \
+       __entry->db_state  = db->db_state;                      \
+       __entry->db_holds  = refcount_count(&db->db_holds);
+
+#define        DBUF_TP_PRINTK_FMT                                              \
+       "dbuf { spa \"%s\" objset %llu object %llu level %llu "         \
+       "blkid %llu offset %llu size %llu state %llu holds %lld }"
+
+#define        DBUF_TP_PRINTK_ARGS                                     \
+       __entry->os_spa, __entry->ds_object,                    \
+       __entry->db_object, __entry->db_level,                  \
+       __entry->db_blkid, __entry->db_offset,                  \
+       __entry->db_size, __entry->db_state, __entry->db_holds
+
+DECLARE_EVENT_CLASS(zfs_dbuf_class,
+       TP_PROTO(dmu_buf_impl_t *db, zio_t *zio),
+       TP_ARGS(db, zio),
+       TP_STRUCT__entry(DBUF_TP_STRUCT_ENTRY),
+       TP_fast_assign(DBUF_TP_FAST_ASSIGN),
+       TP_printk(DBUF_TP_PRINTK_FMT, DBUF_TP_PRINTK_ARGS)
+);
+
+#define        DEFINE_DBUF_EVENT(name) \
+DEFINE_EVENT(zfs_dbuf_class, name, \
+       TP_PROTO(dmu_buf_impl_t *db, zio_t *zio), \
+       TP_ARGS(db, zio))
+DEFINE_DBUF_EVENT(zfs_blocked__read);
+
+#endif /* _TRACE_DBUF_H */
+
+#undef TRACE_INCLUDE_PATH
+#undef TRACE_INCLUDE_FILE
+#define        TRACE_INCLUDE_PATH sys
+#define        TRACE_INCLUDE_FILE trace_dbuf
+#include <trace/define_trace.h>
+
+#endif /* _KERNEL && HAVE_DECLARE_EVENT_CLASS */