Re: [PATCH bpf-next v3 8/8] bpf: add documentation for eBPF helpers (58-64)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



2018-04-18 15:34 UTC+0200 ~ Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
> On Tue, 17 Apr 2018 15:34:38 +0100
> Quentin Monnet <quentin.monnet@xxxxxxxxxxxxx> wrote:
> 
>> diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
>> index 350459c583de..3d329538498f 100644
>> --- a/include/uapi/linux/bpf.h
>> +++ b/include/uapi/linux/bpf.h
>> @@ -1276,6 +1276,50 @@ union bpf_attr {
>>   * 	Return
>>   * 		0 on success, or a negative error in case of failure.
>>   *
>> + * int bpf_redirect_map(struct bpf_map *map, u32 key, u64 flags)
>> + * 	Description
>> + * 		Redirect the packet to the endpoint referenced by *map* at
>> + * 		index *key*. Depending on its type, his *map* can contain
>                                                     ^^^
> 
> "his" -> "this"

Thanks!

>> + * 		references to net devices (for forwarding packets through other
>> + * 		ports), or to CPUs (for redirecting XDP frames to another CPU;
>> + * 		but this is only implemented for native XDP (with driver
>> + * 		support) as of this writing).
>> + *
>> + * 		All values for *flags* are reserved for future usage, and must
>> + * 		be left at zero.
>> + * 	Return
>> + * 		**XDP_REDIRECT** on success, or **XDP_ABORT** on error.
>> + *
> 
> "XDP_ABORT" -> "XDP_ABORTED"

Ouch. And I did the same for bpf_redirect(). Thanks for the catch.

> 
> I don't know if it's worth mentioning in the doc/man-page; that for XDP
> using bpf_redirect_map() is a HUGE performance advantage, compared to
> the bpf_redirect() call ?

It seems worth to me. How would you simply explain the reason for this
difference?

Quentin
--
To unsubscribe from this list: send the line "unsubscribe linux-man" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Kernel Documentation]     [Netdev]     [Linux Ethernet Bridging]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux Admin]     [Samba]

  Powered by Linux