[PATCH 31/73] libperf: Add perf_evlist__id_add_fd function

[Jiri Olsa]

Adding perf_evlist__id_add_fd function to libperf
as internal function.

Link: http://lkml.kernel.org/n/tip-ba32sqqoqy925xs4l1bvwg1f@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
 tools/perf/lib/evlist.c                  | 44 ++++++++++++++++++++++++
 tools/perf/lib/include/internal/evlist.h |  4 +++
 tools/perf/util/evlist.c                 | 43 +----------------------
 tools/perf/util/evlist.h                 |  4 ---
 tools/perf/util/evsel.c                  |  2 +-
 5 files changed, 50 insertions(+), 47 deletions(-)

diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index f4f8e37c6272..35467d99cea5 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -3,11 +3,14 @@
 #include <perf/evsel.h>
 #include <linux/list.h>
 #include <linux/hash.h>
+#include <sys/ioctl.h>
 #include <internal/evlist.h>
 #include <internal/evsel.h>
 #include <internal/xyarray.h>
 #include <linux/zalloc.h>
 #include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
 #include <perf/cpumap.h>
 #include <perf/threadmap.h>
 
@@ -193,3 +196,44 @@ void perf_evlist__id_add(struct perf_evlist *evlist,
 	perf_evlist__id_hash(evlist, evsel, cpu, thread, id);
 	evsel->id[evsel->ids++] = id;
 }
+
+int perf_evlist__id_add_fd(struct perf_evlist *evlist,
+			   struct perf_evsel *evsel,
+			   int cpu, int thread, int fd)
+{
+	u64 read_data[4] = { 0, };
+	int id_idx = 1; /* The first entry is the counter value */
+	u64 id;
+	int ret;
+
+	ret = ioctl(fd, PERF_EVENT_IOC_ID, &id);
+	if (!ret)
+		goto add;
+
+	if (errno != ENOTTY)
+		return -1;
+
+	/* Legacy way to get event id.. All hail to old kernels! */
+
+	/*
+	 * This way does not work with group format read, so bail
+	 * out in that case.
+	 */
+	if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP)
+		return -1;
+
+	if (!(evsel->attr.read_format & PERF_FORMAT_ID) ||
+	    read(fd, &read_data, sizeof(read_data)) == -1)
+		return -1;
+
+	if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
+		++id_idx;
+	if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
+		++id_idx;
+
+	id = read_data[id_idx];
+
+add:
+	perf_evlist__id_add(evlist, evsel, cpu, thread, id);
+	return 0;
+}
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 649406f717bc..7d64185cfabd 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -72,4 +72,8 @@ void perf_evlist__id_add(struct perf_evlist *evlist,
 			 struct perf_evsel *evsel,
 			 int cpu, int thread, u64 id);
 
+int perf_evlist__id_add_fd(struct perf_evlist *evlist,
+			   struct perf_evsel *evsel,
+			   int cpu, int thread, int fd);
+
 #endif /* __LIBPERF_INTERNAL_EVLIST_H */
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index dde6c68b9a42..433e9af6e063 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -460,47 +460,6 @@ int perf_evlist__poll(struct evlist *evlist, int timeout)
 	return fdarray__poll(&evlist->core.pollfd, timeout);
 }
 
-int perf_evlist__id_add_fd(struct evlist *evlist,
-			   struct evsel *evsel,
-			   int cpu, int thread, int fd)
-{
-	u64 read_data[4] = { 0, };
-	int id_idx = 1; /* The first entry is the counter value */
-	u64 id;
-	int ret;
-
-	ret = ioctl(fd, PERF_EVENT_IOC_ID, &id);
-	if (!ret)
-		goto add;
-
-	if (errno != ENOTTY)
-		return -1;
-
-	/* Legacy way to get event id.. All hail to old kernels! */
-
-	/*
-	 * This way does not work with group format read, so bail
-	 * out in that case.
-	 */
-	if (perf_evlist__read_format(&evlist->core) & PERF_FORMAT_GROUP)
-		return -1;
-
-	if (!(evsel->core.attr.read_format & PERF_FORMAT_ID) ||
-	    read(fd, &read_data, sizeof(read_data)) == -1)
-		return -1;
-
-	if (evsel->core.attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
-		++id_idx;
-	if (evsel->core.attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
-		++id_idx;
-
-	id = read_data[id_idx];
-
- add:
-	perf_evlist__id_add(&evlist->core, &evsel->core, cpu, thread, id);
-	return 0;
-}
-
 static void perf_evlist__set_sid_idx(struct evlist *evlist,
 				     struct evsel *evsel, int idx, int cpu,
 				     int thread)
@@ -775,7 +734,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
 		}
 
 		if (evsel->core.attr.read_format & PERF_FORMAT_ID) {
-			if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread,
+			if (perf_evlist__id_add_fd(&evlist->core, &evsel->core, cpu, thread,
 						   fd) < 0)
 				return -1;
 			perf_evlist__set_sid_idx(evlist, evsel, idx, cpu,
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 37f29b67dd61..204315516c32 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -113,10 +113,6 @@ struct evsel *
 perf_evlist__find_tracepoint_by_name(struct evlist *evlist,
 				     const char *name);
 
-int perf_evlist__id_add_fd(struct evlist *evlist,
-			   struct evsel *evsel,
-			   int cpu, int thread, int fd);
-
 int perf_evlist__add_pollfd(struct evlist *evlist, int fd);
 int perf_evlist__alloc_pollfd(struct evlist *evlist);
 int perf_evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask);
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 904b67d23bde..d69549c57fda 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -2936,7 +2936,7 @@ static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
 		     thread++) {
 			int fd = FD(evsel, cpu, thread);
 
-			if (perf_evlist__id_add_fd(evlist, evsel,
+			if (perf_evlist__id_add_fd(&evlist->core, &evsel->core,
 						   cpu, thread, fd) < 0)
 				return -1;
 		}
-- 
2.21.0