netdev - Re: [PATCH iproute2 -master 1/2] bpf: update printing of generic xdp mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sat, 13 May 2017 11:19:10 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        stephen@...workplumber.org
CC:     alexei.starovoitov@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH iproute2 -master 1/2] bpf: update printing of generic
 xdp mode

On 05/13/2017 11:01 AM, Sergei Shtylyov wrote:
> On 5/13/2017 3:32 AM, Daniel Borkmann wrote:
>
>> Follow-up to d67b9cd28c1d ("xdp: refine xdp api with regards to
>> generic xdp") in order to update the XDP dumping part.
>>
>> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
>> ---
>>  ip/iplink_xdp.c | 19 +++++++++++--------
>>  1 file changed, 11 insertions(+), 8 deletions(-)
>>
>> diff --git a/ip/iplink_xdp.c b/ip/iplink_xdp.c
>> index a1380ee..98503fa 100644
>> --- a/ip/iplink_xdp.c
>> +++ b/ip/iplink_xdp.c
>> @@ -79,17 +79,20 @@ int xdp_parse(int *argc, char ***argv, struct iplink_req *req, bool generic)
>>  void xdp_dump(FILE *fp, struct rtattr *xdp)
>>  {
>>      struct rtattr *tb[IFLA_XDP_MAX + 1];
>> -    __u32 flags = 0;
>> +    __u8 mode;
>>
>>      parse_rtattr_nested(tb, IFLA_XDP_MAX, xdp);
>>
>> -    if (!tb[IFLA_XDP_ATTACHED] ||
>> -        !rta_getattr_u8(tb[IFLA_XDP_ATTACHED]))
>> +    if (!tb[IFLA_XDP_ATTACHED])
>>          return;
>>
>> -    if (tb[IFLA_XDP_FLAGS])
>> -        flags = rta_getattr_u32(tb[IFLA_XDP_FLAGS]);
>> -
>> -    fprintf(fp, "xdp%s ",
>> -        flags & XDP_FLAGS_SKB_MODE ? "generic" : "");
>> +    mode = rta_getattr_u8(tb[IFLA_XDP_ATTACHED]);
>> +    if (mode == XDP_ATTACHED_NONE)
>> +        return;
>> +    else if (mode == XDP_ATTACHED_DRV)
>> +        fprintf(fp, "xdp ");
>> +    else if (mode == XDP_ATTACHED_SKB)
>> +        fprintf(fp, "xdpgeneric ");
>> +    else
>> +        fprintf(fp, "xdp[%u] ", mode);
>
>     This is asking to be a *switch* statement.

The code is fine as-is, thank you !