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perf trace: Store the major number for a file when storing its pathname

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We keep a table for the fds to map them back to pathnames when showing
'fd' based APIs such as write(), store as well the major number for the
device the path is in, to use in things like choosing the right ioctl
'cmd' beautifier.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-qjkds7bnk7v7fk2xhqsb0a4v@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2018-12-27 13:32:59 -03:00
parent d7e134845d
commit 4bcc4cff6a
1 changed files with 5 additions and 0 deletions
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5
tools/perf/builtin-trace.c
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@ -60,6 +60,7 @@
#include <linux/stringify.h>
#include <linux/time64.h>
#include <fcntl.h>
#include <sys/sysmacros.h>
#include "sane_ctype.h"
@ -959,6 +960,7 @@ static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp)
struct file {
char *pathname;
int dev_maj;
};
/**
@ -1068,6 +1070,9 @@ static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pat
struct file *file = thread_trace__files_entry(ttrace, fd);
if (file != NULL) {
struct stat st;
if (stat(pathname, &st) == 0)
file->dev_maj = major(st.st_rdev);
file->pathname = strdup(pathname);
if (file->pathname)
return 0;