From 4bcc4cff6a10e5287d4dd3e73b6b4689f9a0c570 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Thu, 27 Dec 2018 13:32:59 -0300 Subject: perf trace: Store the major number for a file when storing its pathname MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Cc: Jiri Olsa Cc: Luis Cláudio Gonçalves Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-qjkds7bnk7v7fk2xhqsb0a4v@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 41ab524e128b7..4b03f66b17356 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -60,6 +60,7 @@ #include #include #include +#include #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; -- cgit v1.2.3