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perf tools: Pass a fd to perf_file_header__read_pipe()

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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
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
tools/perf/builtin-inject.c
View file

@ -992,7 +992,8 @@ int cmd_inject(int argc, const char **argv)
}
data.path = inject.input_name;
inject.session = __perf_session__new(&data, inject.output.is_pipe, &inject.tool);
inject.session = __perf_session__new(&data, inject.output.is_pipe,
perf_data__fd(&inject.output), &inject.tool);
if (IS_ERR(inject.session)) {
ret = PTR_ERR(inject.session);
goto out_close_output;

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;

2
tools/perf/util/header.h
View file

@ -115,7 +115,7 @@ struct perf_session;
struct perf_tool;
union perf_event;
int perf_session__read_header(struct perf_session *session);
int perf_session__read_header(struct perf_session *session, int repipe_fd);
int perf_session__write_header(struct perf_session *session,
struct evlist *evlist,
int fd, bool at_exit);

8
tools/perf/util/session.c
View file

@ -102,11 +102,11 @@ static int perf_session__deliver_event(struct perf_session *session,
struct perf_tool *tool,
u64 file_offset);
static int perf_session__open(struct perf_session *session)
static int perf_session__open(struct perf_session *session, int repipe_fd)
{
struct perf_data *data = session->data;
if (perf_session__read_header(session) < 0) {
if (perf_session__read_header(session, repipe_fd) < 0) {
pr_err("incompatible file format (rerun with -v to learn more)\n");
return -1;
}
@ -186,7 +186,7 @@ static int ordered_events__deliver_event(struct ordered_events *oe,
}
struct perf_session *__perf_session__new(struct perf_data *data,
bool repipe,
bool repipe, int repipe_fd,
struct perf_tool *tool)
{
int ret = -ENOMEM;
@ -211,7 +211,7 @@ struct perf_session *__perf_session__new(struct perf_data *data,
session->data = data;
if (perf_data__is_read(data)) {
ret = perf_session__open(session);
ret = perf_session__open(session, repipe_fd);
if (ret < 0)
goto out_delete;

4
tools/perf/util/session.h
View file

@ -55,13 +55,13 @@ struct decomp {
struct perf_tool;
struct perf_session *__perf_session__new(struct perf_data *data,
bool repipe,
bool repipe, int repipe_fd,
struct perf_tool *tool);
static inline struct perf_session *perf_session__new(struct perf_data *data,
struct perf_tool *tool)
{
return __perf_session__new(data, false, tool);
return __perf_session__new(data, false, -1, tool);
}
void perf_session__delete(struct perf_session *session);