]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commitdiff
tracing/syscalls: Rename "/format" tracepoint field name "nr" to "__syscall_nr:
authorTaeung Song <treeze.taeung@gmail.com>
Fri, 26 Feb 2016 18:23:01 +0000 (13:23 -0500)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Mon, 29 Feb 2016 14:34:53 +0000 (11:34 -0300)
Some tracepoint have multiple fields with the same name, "nr", the first
one is a unique syscall ID, the other is a syscall argument:

  # cat /sys/kernel/debug/tracing/events/syscalls/sys_enter_io_getevents/format
  name: sys_enter_io_getevents
  ID: 747
  format:
  field:unsigned short common_type; offset:0; size:2; signed:0;
  field:unsigned char common_flags; offset:2; size:1; signed:0;
  field:unsigned char common_preempt_count; offset:3; size:1; signed:0;
  field:int common_pid; offset:4; size:4; signed:1;

  field:int nr; offset:8; size:4; signed:1;
  field:aio_context_t ctx_id; offset:16; size:8; signed:0;
  field:long min_nr; offset:24; size:8; signed:0;
  field:long nr; offset:32; size:8; signed:0;
  field:struct io_event * events; offset:40; size:8; signed:0;
  field:struct timespec * timeout; offset:48; size:8; signed:0;

  print fmt: "ctx_id: 0x%08lx, min_nr: 0x%08lx, nr: 0x%08lx, events: 0x%08lx, timeout: 0x%08lx", ((unsigned long)(REC->ctx_id)), ((unsigned long)(REC->min_nr)), ((unsigned long)(REC->nr)), ((unsigned long)(REC->events)), ((unsigned long)(REC->timeout))
  #

Fix it by renaming the "/format" common tracepoint field "nr" to "__syscall_nr".

Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
[ Do not rename the struct member, just the '/format' field name ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160226132301.3ae065a4@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
kernel/trace/trace_syscalls.c

index 0655afbea83f596ded953d6017e0f25a640bc073..d1663083d903aaad3ce4b359cfdb20068004b237 100644 (file)
@@ -186,11 +186,11 @@ print_syscall_exit(struct trace_iterator *iter, int flags,
 
 extern char *__bad_type_size(void);
 
-#define SYSCALL_FIELD(type, name)                                      \
-       sizeof(type) != sizeof(trace.name) ?                            \
+#define SYSCALL_FIELD(type, field, name)                               \
+       sizeof(type) != sizeof(trace.field) ?                           \
                __bad_type_size() :                                     \
-               #type, #name, offsetof(typeof(trace), name),            \
-               sizeof(trace.name), is_signed_type(type)
+               #type, #name, offsetof(typeof(trace), field),           \
+               sizeof(trace.field), is_signed_type(type)
 
 static int __init
 __set_enter_print_fmt(struct syscall_metadata *entry, char *buf, int len)
@@ -261,7 +261,8 @@ static int __init syscall_enter_define_fields(struct trace_event_call *call)
        int i;
        int offset = offsetof(typeof(trace), args);
 
-       ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
+       ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
+                                FILTER_OTHER);
        if (ret)
                return ret;
 
@@ -281,11 +282,12 @@ static int __init syscall_exit_define_fields(struct trace_event_call *call)
        struct syscall_trace_exit trace;
        int ret;
 
-       ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
+       ret = trace_define_field(call, SYSCALL_FIELD(int, nr, __syscall_nr),
+                                FILTER_OTHER);
        if (ret)
                return ret;
 
-       ret = trace_define_field(call, SYSCALL_FIELD(long, ret),
+       ret = trace_define_field(call, SYSCALL_FIELD(long, ret, ret),
                                 FILTER_OTHER);
 
        return ret;