leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

perf tools: Pass a fd to perf_file_header__read_pipe()

Browse Source 
Currently it unconditionally writes to stdout for repipe.  But perf
inject can direct its output to a regular file.  Then it needs to
write the header to the file as well.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210719223153.1618812-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2021-07-19 15:31:50 -07:00
committed by Arnaldo Carvalho de Melo
parent 2681bd85a4
commit 0ae0389362
5 changed files with 15 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
tools/perf/util/header.c
View File

@@ -3865,10 +3865,10 @@ static int perf_file_section__process(struct perf_file_section *section,
static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
struct perf_header *ph,
struct perf_data* data,
bool repipe)
bool repipe, int repipe_fd)
{
struct feat_fd ff = {
.fd = STDOUT_FILENO,
.fd = repipe_fd,
.ph = ph,
};
ssize_t ret;
@@ -3891,13 +3891,13 @@ static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
return 0;
}
static int perf_header__read_pipe(struct perf_session *session)
static int perf_header__read_pipe(struct perf_session *session, int repipe_fd)
{
struct perf_header *header = &session->header;
struct perf_pipe_file_header f_header;
if (perf_file_header__read_pipe(&f_header, header, session->data,
session->repipe) < 0) {
session->repipe, repipe_fd) < 0) {
pr_debug("incompatible file format\n");
return -EINVAL;
}
@@ -3995,7 +3995,7 @@ static int evlist__prepare_tracepoint_events(struct evlist *evlist, struct tep_h
return 0;
}
int perf_session__read_header(struct perf_session *session)
int perf_session__read_header(struct perf_session *session, int repipe_fd)
{
struct perf_data *data = session->data;
struct perf_header *header = &session->header;
@@ -4016,7 +4016,7 @@ int perf_session__read_header(struct perf_session *session)
* We can read 'pipe' data event from regular file,
* check for the pipe header regardless of source.
*/
err = perf_header__read_pipe(session);
err = perf_header__read_pipe(session, repipe_fd);
if (!err || perf_data__is_pipe(data)) {
data->is_pipe = true;
return err;