Commit-ID: 4bcc4cff6a10e5287d4dd3e73b6b4689f9a0c570 Gitweb: https://git.kernel.org/tip/4bcc4cff6a10e5287d4dd3e73b6b4689f9a0c570 Author: Arnaldo Carvalho de Melo <[email protected]> AuthorDate: Thu, 27 Dec 2018 13:32:59 -0300 Committer: Arnaldo Carvalho de Melo <[email protected]> CommitDate: Fri, 28 Dec 2018 16:33:04 -0300
perf trace: Store the major number for a file when storing its pathname 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;
