On Thu, Sep 10, 2020 at 9:41 AM Andrii Nakryiko
<andrii.nakryiko@xxxxxxxxx> wrote:
>
> On Thu, Sep 10, 2020 at 3:27 AM Quentin Monnet <quentin@xxxxxxxxxxxxx> wrote:
> >
> > The function used to dump a map entry in bpftool is a bit difficult to
> > follow, as a consequence to earlier refactorings. There is a variable
> > ("num_elems") which does not appear to be necessary, and the error
> > handling would look cleaner if moved to its own function. Let's clean it
> > up. No functional change.
> >
> > v2:
> > - v1 was erroneously removing the check on fd maps in an attempt to get
> > support for outer map dumps. This is already working. Instead, v2
> > focuses on cleaning up the dump_map_elem() function, to avoid
> > similar confusion in the future.
> >
> > Signed-off-by: Quentin Monnet <quentin@xxxxxxxxxxxxx>
> > ---
> > tools/bpf/bpftool/map.c | 101 +++++++++++++++++++++-------------------
> > 1 file changed, 52 insertions(+), 49 deletions(-)
> >
> > diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
> > index bc0071228f88..c8159cb4fb1e 100644
> > --- a/tools/bpf/bpftool/map.c
> > +++ b/tools/bpf/bpftool/map.c
> > @@ -213,8 +213,9 @@ static void print_entry_json(struct bpf_map_info *info, unsigned char *key,
> > jsonw_end_object(json_wtr);
> > }
> >
> > -static void print_entry_error(struct bpf_map_info *info, unsigned char *key,
> > - const char *error_msg)
> > +static void
> > +print_entry_error_msg(struct bpf_map_info *info, unsigned char *key,
> > + const char *error_msg)
> > {
> > int msg_size = strlen(error_msg);
> > bool single_line, break_names;
> > @@ -232,6 +233,40 @@ static void print_entry_error(struct bpf_map_info *info, unsigned char *key,
> > printf("\n");
> > }
> >
> > +static void
> > +print_entry_error(struct bpf_map_info *map_info, void *key, int lookup_errno)
> > +{
> > + /* For prog_array maps or arrays of maps, failure to lookup the value
> > + * means there is no entry for that key. Do not print an error message
> > + * in that case.
> > + */
> > + if (map_is_map_of_maps(map_info->type) ||
> > + map_is_map_of_progs(map_info->type))
>
> && lookup_errno == ENOENT
>
> ?
Never mind, you did it in a separate patch.
Acked-by: Andrii Nakryiko <andriin@xxxxxx>
>
>
> > + return;
> > +
>
> [...]
