From: Arnaldo Carvalho de Melo <a...@redhat.com> The pathname beautifiers so far support just one augmented pathname per syscall, so do it just for mount's first arg, later this will get fixed.
With: # perf probe -l probe:vfs_getname (on getname_flags:73@acme/git/linux/fs/namei.c with pathname) # Later this will get added to augmented_syscalls.c (eBPF): In one xterm: # perf trace -e mount,umount 2687.331 ( 3.544 ms): mount/8892 mount(dev_name: /mnt, dir_name: 0x561f9ac184a0, type: 0x561f9ac1b170, flags: BIND) = 0 3912.126 ( 8.807 ms): umount/8895 umount2(name: /mnt) = 0 ^C# In the other: $ sudo mount --bind /proc /mnt $ sudo umount /mnt Cc: Adrian Hunter <adrian.hun...@intel.com> Cc: Benjamin Peterson <benja...@python.org> Cc: David Ahern <dsah...@gmail.com> Cc: Jiri Olsa <jo...@kernel.org> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Wang Nan <wangn...@huawei.com> Link: https://lkml.kernel.org/n/tip-qsvhrm2es635cl4zicqje...@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/builtin-trace.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index d286f73ef2e5..dc8a6c4986ce 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -727,7 +727,8 @@ static struct syscall_fmt { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, }, }, { .name = "mount", - .arg = { [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ + .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, + [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, { .name = "mprotect", .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, -- 2.14.4
