netdev - Re: [RFC PATCH v3 10/20] io_uring: setup ZC for an Rx queue when registering an ifq

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: Wed, 20 Dec 2023 16:24:20 +0000
From: Pavel Begunkov <asml.silence@...il.com>
To: Jens Axboe <axboe@...nel.dk>, David Wei <dw@...idwei.uk>,
 io-uring@...r.kernel.org, netdev@...r.kernel.org
Cc: Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jesper Dangaard Brouer <hawk@...nel.org>, David Ahern <dsahern@...nel.org>,
 Mina Almasry <almasrymina@...gle.com>
Subject: Re: [RFC PATCH v3 10/20] io_uring: setup ZC for an Rx queue when
 registering an ifq

On 12/20/23 16:06, Jens Axboe wrote:
> On 12/19/23 2:03 PM, David Wei wrote:
>> From: David Wei <davidhwei@...a.com>
>>
>> This patch sets up ZC for an Rx queue in a net device when an ifq is
>> registered with io_uring. The Rx queue is specified in the registration
>> struct.
>>
>> For now since there is only one ifq, its destruction is implicit during
>> io_uring cleanup.
>>
>> Signed-off-by: David Wei <dw@...idwei.uk>
>> ---
>>   io_uring/zc_rx.c | 45 +++++++++++++++++++++++++++++++++++++++++++--
>>   1 file changed, 43 insertions(+), 2 deletions(-)
>>
>> diff --git a/io_uring/zc_rx.c b/io_uring/zc_rx.c
>> index 7e3e6f6d446b..259e08a34ab2 100644
>> --- a/io_uring/zc_rx.c
>> +++ b/io_uring/zc_rx.c
>> @@ -4,6 +4,7 @@
>>   #include <linux/errno.h>
>>   #include <linux/mm.h>
>>   #include <linux/io_uring.h>
>> +#include <linux/netdevice.h>
>>   
>>   #include <uapi/linux/io_uring.h>
>>   
>> @@ -11,6 +12,34 @@
>>   #include "kbuf.h"
>>   #include "zc_rx.h"
>>   
>> +typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
> 
> Let's get rid of this, since it isn't even typedef'ed on the networking
> side. Doesn't really buy us anything, and it's only used once anyway.

That should naturally go away once we move from ndo_bpf

-- 
Pavel Begunkov