On Thu, Jun 18, 2020 at 09:44:23PM -0700, Andrii Nakryiko wrote:
> On Tue, Jun 16, 2020 at 3:07 AM Jiri Olsa <jolsa@xxxxxxxxxx> wrote:
> >
> > Adding test for d_path helper which is pretty much
> > copied from Wenbo Zhang's test for bpf_get_fd_path,
> > which never made it in.
> >
> > I've failed so far to compile the test with <linux/fs.h>
> > kernel header, so for now adding 'struct file' with f_path
> > member that has same offset as kernel's file object.
> >
> > Original-patch-by: Wenbo Zhang <ethercflow@xxxxxxxxx>
> > Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
> > ---
> > .../testing/selftests/bpf/prog_tests/d_path.c | 153 ++++++++++++++++++
> > .../testing/selftests/bpf/progs/test_d_path.c | 55 +++++++
> > 2 files changed, 208 insertions(+)
> > create mode 100644 tools/testing/selftests/bpf/prog_tests/d_path.c
> > create mode 100644 tools/testing/selftests/bpf/progs/test_d_path.c
> >
> > diff --git a/tools/testing/selftests/bpf/prog_tests/d_path.c b/tools/testing/selftests/bpf/prog_tests/d_path.c
> > new file mode 100644
> > index 000000000000..e2b7dfeb506f
> > --- /dev/null
> > +++ b/tools/testing/selftests/bpf/prog_tests/d_path.c
> > @@ -0,0 +1,153 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +#define _GNU_SOURCE
> > +#include <test_progs.h>
> > +#include <sys/stat.h>
> > +#include <linux/sched.h>
> > +#include <sys/syscall.h>
> > +
> > +#define MAX_PATH_LEN 128
> > +#define MAX_FILES 7
> > +#define MAX_EVENT_NUM 16
> > +
> > +struct d_path_test_data {
> > + pid_t pid;
> > + __u32 cnt_stat;
> > + __u32 cnt_close;
> > + char paths_stat[MAX_EVENT_NUM][MAX_PATH_LEN];
> > + char paths_close[MAX_EVENT_NUM][MAX_PATH_LEN];
> > +};
>
> with skeleton there is no point in defining this container struct, and
> especially duplicating it between BPF code and user-space code. Just
> declare all those fields as global variables and access them from
> skeleton directly.
ok, will check
>
> [...]
>
> > diff --git a/tools/testing/selftests/bpf/progs/test_d_path.c b/tools/testing/selftests/bpf/progs/test_d_path.c
> > new file mode 100644
> > index 000000000000..1b478c00ee7a
> > --- /dev/null
> > +++ b/tools/testing/selftests/bpf/progs/test_d_path.c
> > @@ -0,0 +1,55 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +
> > +#include "vmlinux.h"
> > +#include <bpf/bpf_helpers.h>
> > +#include <bpf/bpf_tracing.h>
> > +
> > +#define MAX_PATH_LEN 128
> > +#define MAX_EVENT_NUM 16
> > +
> > +static struct d_path_test_data {
> > + pid_t pid;
> > + __u32 cnt_stat;
> > + __u32 cnt_close;
> > + char paths_stat[MAX_EVENT_NUM][MAX_PATH_LEN];
> > + char paths_close[MAX_EVENT_NUM][MAX_PATH_LEN];
> > +} data;
> > +
> > +struct path;
> > +struct kstat;
>
> both structs are in vmlinux.h, you shouldn't need this.
leftover from earlier version, will remove
thanks,
jirka
