From: Arnaldo Carvalho de Melo <[email protected]> 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 <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- 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 41ab524e128b..4b03f66b1735 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -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; -- 2.19.2
