Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754225Ab3C0Jto (ORCPT ); Wed, 27 Mar 2013 05:49:44 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:45193 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753792Ab3C0Jtf (ORCPT ); Wed, 27 Mar 2013 05:49:35 -0400 From: "zhangwei(Jovi)" To: Steven Rostedt , Frederic Weisbecker , Ingo Molnar , LKML CC: "zhangwei(Jovi)" Subject: [PATCH 06/14] tracing: export syscall metadata Date: Wed, 27 Mar 2013 17:48:48 +0800 Message-ID: <1364377737-10540-8-git-send-email-jovi.zhangwei@huawei.com> X-Mailer: git-send-email 1.8.1.msysgit.1 In-Reply-To: <1364377737-10540-1-git-send-email-jovi.zhangwei@huawei.com> References: <1364377737-10540-1-git-send-email-jovi.zhangwei@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.66.58.241] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3514 Lines: 110 From: "zhangwei(Jovi)" Currently syscall metadata is important for kernel syscall tracing, even mandatory, external modules may need this metadata when perform syscall tracing(like ktap tool), so export it. Instead of export variable syscalls_metadata, export function syscall_nr_to_meta is more safe. This patch also rename syscall_nr_to_meta to trace_syscall_nr_to_metadata. Signed-off-by: zhangwei(Jovi) --- include/trace/syscall.h | 1 + kernel/trace/trace_syscalls.c | 15 ++++++++------- 2 files changed, 9 insertions(+), 7 deletions(-) diff --git a/include/trace/syscall.h b/include/trace/syscall.h index 84bc419..428634e 100644 --- a/include/trace/syscall.h +++ b/include/trace/syscall.h @@ -31,4 +31,5 @@ struct syscall_metadata { struct ftrace_event_call *exit_event; }; +struct syscall_metadata *trace_syscall_nr_to_meta(int nr); #endif /* _TRACE_SYSCALL_H */ diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c index 72675b1..d739471 100644 --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -98,13 +98,14 @@ find_syscall_meta(unsigned long syscall) return NULL; } -static struct syscall_metadata *syscall_nr_to_meta(int nr) +struct syscall_metadata *trace_syscall_nr_to_meta(int nr) { if (!syscalls_metadata || nr >= NR_syscalls || nr < 0) return NULL; return syscalls_metadata[nr]; } +EXPORT_SYMBOL_GPL(trace_syscall_nr_to_meta); static enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags, @@ -118,7 +119,7 @@ print_syscall_enter(struct trace_iterator *iter, int flags, trace = (typeof(trace))ent; syscall = trace->nr; - entry = syscall_nr_to_meta(syscall); + entry = trace_syscall_nr_to_meta(syscall); if (!entry) goto end; @@ -172,7 +173,7 @@ print_syscall_exit(struct trace_iterator *iter, int flags, trace = (typeof(trace))ent; syscall = trace->nr; - entry = syscall_nr_to_meta(syscall); + entry = trace_syscall_nr_to_meta(syscall); if (!entry) { trace_seq_printf(s, "\n"); @@ -315,7 +316,7 @@ static void ftrace_syscall_enter(void *data, struct pt_regs *regs, long id) if (!test_bit(syscall_nr, tr->enabled_enter_syscalls)) return; - sys_data = syscall_nr_to_meta(syscall_nr); + sys_data = trace_syscall_nr_to_meta(syscall_nr); if (!sys_data) return; @@ -349,7 +350,7 @@ static void ftrace_syscall_exit(void *data, struct pt_regs *regs, long ret) if (!test_bit(syscall_nr, tr->enabled_exit_syscalls)) return; - sys_data = syscall_nr_to_meta(syscall_nr); + sys_data = trace_syscall_nr_to_meta(syscall_nr); if (!sys_data) return; @@ -545,7 +546,7 @@ static void perf_syscall_enter(void *ignore, struct pt_regs *regs, long id) if (!test_bit(syscall_nr, enabled_perf_enter_syscalls)) return; - sys_data = syscall_nr_to_meta(syscall_nr); + sys_data = trace_syscall_nr_to_meta(syscall_nr); if (!sys_data) return; @@ -621,7 +622,7 @@ static void perf_syscall_exit(void *ignore, struct pt_regs *regs, long ret) if (!test_bit(syscall_nr, enabled_perf_exit_syscalls)) return; - sys_data = syscall_nr_to_meta(syscall_nr); + sys_data = trace_syscall_nr_to_meta(syscall_nr); if (!sys_data) return; -- 1.7.9.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/