| /* |
| * 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) |
| |
| /* |
| * Calls to DTRACE_PROBE* are mapped to standard Linux kernel trace points |
| * when they are available(when HAVE_DECLARE_EVENT_CLASS is defined). The |
| * tracepoint event class definitions are found in the general tracing |
| * header file: include/sys/trace_*.h. See include/sys/trace_vdev.h for |
| * a good example. |
| * |
| * If tracepoints are not available, stub functions are generated which can |
| * be traced using kprobes. In this case, the DEFINE_DTRACE_PROBE* macros |
| * are used to provide the stub functions and also the prototypes for |
| * those functions. The mechanism to do this relies on DEFINE_DTRACE_PROBE |
| * macros defined in the general tracing headers(see trace_vdev.h) and |
| * CREATE_TRACE_POINTS being defined only in module/zfs/trace.c. When ZFS |
| * source files include the general tracing headers, e.g. |
| * module/zfs/vdev_removal.c including trace_vdev.h, DTRACE_PROBE calls |
| * are mapped to stub functions calls and prototypes for those calls are |
| * declared via DEFINE_DTRACE_PROBE*. Only module/zfs/trace.c defines |
| * CREATE_TRACE_POINTS. That is followed by includes of all the general |
| * tracing headers thereby defining all stub functions in one place via |
| * the DEFINE_DTRACE_PROBE macros. |
| * |
| * When adding new DTRACE_PROBEs to zfs source, both a tracepoint event |
| * class definition and a DEFINE_DTRACE_PROBE definition are needed to |
| * avoid undefined function errors. |
| */ |
| |
| #if defined(HAVE_DECLARE_EVENT_CLASS) |
| |
| #undef TRACE_SYSTEM |
| #define TRACE_SYSTEM zfs |
| |
| #if !defined(_TRACE_ZFS_H) || defined(TRACE_HEADER_MULTI_READ) |
| #define _TRACE_ZFS_H |
| |
| #include <linux/tracepoint.h> |
| #include <sys/types.h> |
| |
| /* |
| * DTRACE_PROBE with 0 arguments is not currently available with |
| * tracepoint events |
| */ |
| #define DTRACE_PROBE(name) \ |
| ((void)0) |
| |
| #define DTRACE_PROBE1(name, t1, arg1) \ |
| trace_zfs_##name((arg1)) |
| |
| #define DTRACE_PROBE2(name, t1, arg1, t2, arg2) \ |
| trace_zfs_##name((arg1), (arg2)) |
| |
| #define DTRACE_PROBE3(name, t1, arg1, t2, arg2, t3, arg3) \ |
| trace_zfs_##name((arg1), (arg2), (arg3)) |
| |
| #define DTRACE_PROBE4(name, t1, arg1, t2, arg2, t3, arg3, t4, arg4) \ |
| trace_zfs_##name((arg1), (arg2), (arg3), (arg4)) |
| |
| #endif /* _TRACE_ZFS_H */ |
| |
| #undef TRACE_INCLUDE_PATH |
| #undef TRACE_INCLUDE_FILE |
| #define TRACE_INCLUDE_PATH sys |
| #define TRACE_INCLUDE_FILE trace |
| #include <trace/define_trace.h> |
| |
| #else /* HAVE_DECLARE_EVENT_CLASS */ |
| |
| #define DTRACE_PROBE(name) \ |
| trace_zfs_##name() |
| |
| #define DTRACE_PROBE1(name, t1, arg1) \ |
| trace_zfs_##name((uintptr_t)(arg1)) |
| |
| #define DTRACE_PROBE2(name, t1, arg1, t2, arg2) \ |
| trace_zfs_##name((uintptr_t)(arg1), (uintptr_t)(arg2)) |
| |
| #define DTRACE_PROBE3(name, t1, arg1, t2, arg2, t3, arg3) \ |
| trace_zfs_##name((uintptr_t)(arg1), (uintptr_t)(arg2), \ |
| (uintptr_t)(arg3)) |
| |
| #define DTRACE_PROBE4(name, t1, arg1, t2, arg2, t3, arg3, t4, arg4) \ |
| trace_zfs_##name((uintptr_t)(arg1), (uintptr_t)(arg2), \ |
| (uintptr_t)(arg3), (uintptr_t)(arg4)) |
| |
| #define PROTO_DTRACE_PROBE(name) \ |
| noinline void trace_zfs_##name(void) |
| #define PROTO_DTRACE_PROBE1(name) \ |
| noinline void trace_zfs_##name(uintptr_t) |
| #define PROTO_DTRACE_PROBE2(name) \ |
| noinline void trace_zfs_##name(uintptr_t, uintptr_t) |
| #define PROTO_DTRACE_PROBE3(name) \ |
| noinline void trace_zfs_##name(uintptr_t, uintptr_t, \ |
| uintptr_t) |
| #define PROTO_DTRACE_PROBE4(name) \ |
| noinline void trace_zfs_##name(uintptr_t, uintptr_t, \ |
| uintptr_t, uintptr_t) |
| |
| #if defined(CREATE_TRACE_POINTS) |
| |
| #define FUNC_DTRACE_PROBE(name) \ |
| PROTO_DTRACE_PROBE(name); \ |
| noinline void trace_zfs_##name(void) { } \ |
| EXPORT_SYMBOL(trace_zfs_##name) |
| |
| #define FUNC_DTRACE_PROBE1(name) \ |
| PROTO_DTRACE_PROBE1(name); \ |
| noinline void trace_zfs_##name(uintptr_t arg1) { } \ |
| EXPORT_SYMBOL(trace_zfs_##name) |
| |
| #define FUNC_DTRACE_PROBE2(name) \ |
| PROTO_DTRACE_PROBE2(name); \ |
| noinline void trace_zfs_##name(uintptr_t arg1, \ |
| uintptr_t arg2) { } \ |
| EXPORT_SYMBOL(trace_zfs_##name) |
| |
| #define FUNC_DTRACE_PROBE3(name) \ |
| PROTO_DTRACE_PROBE3(name); \ |
| noinline void trace_zfs_##name(uintptr_t arg1, \ |
| uintptr_t arg2, uintptr_t arg3) { } \ |
| EXPORT_SYMBOL(trace_zfs_##name) |
| |
| #define FUNC_DTRACE_PROBE4(name) \ |
| PROTO_DTRACE_PROBE4(name); \ |
| noinline void trace_zfs_##name(uintptr_t arg1, \ |
| uintptr_t arg2, uintptr_t arg3, uintptr_t arg4) { } \ |
| EXPORT_SYMBOL(trace_zfs_##name) |
| |
| #undef DEFINE_DTRACE_PROBE |
| #define DEFINE_DTRACE_PROBE(name) FUNC_DTRACE_PROBE(name) |
| |
| #undef DEFINE_DTRACE_PROBE1 |
| #define DEFINE_DTRACE_PROBE1(name) FUNC_DTRACE_PROBE1(name) |
| |
| #undef DEFINE_DTRACE_PROBE2 |
| #define DEFINE_DTRACE_PROBE2(name) FUNC_DTRACE_PROBE2(name) |
| |
| #undef DEFINE_DTRACE_PROBE3 |
| #define DEFINE_DTRACE_PROBE3(name) FUNC_DTRACE_PROBE3(name) |
| |
| #undef DEFINE_DTRACE_PROBE4 |
| #define DEFINE_DTRACE_PROBE4(name) FUNC_DTRACE_PROBE4(name) |
| |
| #else /* CREATE_TRACE_POINTS */ |
| |
| #define DEFINE_DTRACE_PROBE(name) PROTO_DTRACE_PROBE(name) |
| #define DEFINE_DTRACE_PROBE1(name) PROTO_DTRACE_PROBE1(name) |
| #define DEFINE_DTRACE_PROBE2(name) PROTO_DTRACE_PROBE2(name) |
| #define DEFINE_DTRACE_PROBE3(name) PROTO_DTRACE_PROBE3(name) |
| #define DEFINE_DTRACE_PROBE4(name) PROTO_DTRACE_PROBE4(name) |
| |
| #endif /* CREATE_TRACE_POINTS */ |
| #endif /* HAVE_DECLARE_EVENT_CLASS */ |
| #endif /* _KERNEL */ |