/* * 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 follwed 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 defintition 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 #include /* * The sys/trace_dbgmsg.h header defines tracepoint events for * dprintf(), dbgmsg(), and SET_ERROR(). */ #define _SYS_TRACE_DBGMSG_INDIRECT #include #undef _SYS_TRACE_DBGMSG_INDIRECT /* * 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 #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)) #if defined(CREATE_TRACE_POINTS) #define FUNC_DTRACE_PROBE(name) \ noinline void trace_zfs_##name(void) { } \ EXPORT_SYMBOL(trace_zfs_##name) #define FUNC_DTRACE_PROBE1(name) \ noinline void trace_zfs_##name(uintptr_t arg1) { } \ EXPORT_SYMBOL(trace_zfs_##name) #define FUNC_DTRACE_PROBE2(name) \ noinline void trace_zfs_##name(uintptr_t arg1, \ uintptr_t arg2) { } \ EXPORT_SYMBOL(trace_zfs_##name) #define FUNC_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) \ 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 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) #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 */ /* * The sys/trace_dbgmsg.h header defines tracepoint events for * dprintf(), dbgmsg(), and SET_ERROR(). */ #define _SYS_TRACE_DBGMSG_INDIRECT #include #undef _SYS_TRACE_DBGMSG_INDIRECT #endif /* HAVE_DECLARE_EVENT_CLASS */ #endif /* _KERNEL */