Re: struct sock change in kernel 2.6

[lijin liu]

Hi Bharath,all,

On Thu, Dec 23, 2010 at 12:31 AM, Bharath H S bhslin...@gmail.com wrote:

 Hi Lijin liu,
 There is sk_sleep function in include/net/sock.h line 1241 This might help.
 - Bharath H S



 On Wed, Dec 22, 2010 at 11:47 AM, lijin liu llj...@gmail.com wrote:

 Hello everyone!

 I am trying to implement a simple tcp server in the kernel. I read the
 ktcpvs's source code, but it works under kernel 2.4.

 The  struct sock changed in kernel 2.6, I have two questions about the 
 struct:

 1. Is sk_wq field in 2.6 equals to sk_sleep field in 2.4?
 2. How can I access the tcp accept queue in kernel 2.6? (In kernel
 2.4, we could use tp_pinfo.af_tcp.accept_queue, but it was removed in
 2.6)


 PS: Should sk_receive_queue in the struct sock be used as
 tp_pinfo.af_tcp.accept_queue?

 Thanks a lot!

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It seems that I found the answer.

After reading the source code, comparing the codes of the two versions
I got the answer:

1.We can use sk_wq-wait instead of sk_wait.
2.Use reqsk_queue_empty(struct request_sock_queue*) to check if there
is a new connection to accept. (thsi method is in net/request_sock.h)
we can use it like:

struct inet_connection_sock *isock = inet_csk(socket-sk);
if(reqsk_queue_empty(isock-icsk_accept_queue)){
 //sleep here
}

I test them in my code, works well.

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Re: struct sock change in kernel 2.6

[Mulyadi Santosa]

On Thu, Dec 23, 2010 at 07:18, lijin liu llj...@gmail.com wrote:
 After reading the source code, comparing the codes of the two versions
 I got the answer:

 1.We can use sk_wq-wait instead of sk_wait.
 2.Use reqsk_queue_empty(struct request_sock_queue*) to check if there
 is a new connection to accept. (thsi method is in net/request_sock.h)
 we can use it like:

        struct inet_connection_sock *isock = inet_csk(socket-sk);
        if(reqsk_queue_empty(isock-icsk_accept_queue)){
                 //sleep here
        }

Thanks for sharing :) I believe you're intention is porting that code
to latest kernel version, right?

Then, i humbly suggest that you contribute the porting back to the
original project. Who knows, that way many people will get the
advantage and indirectly you got the benefit too: you become popular
:)

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com

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struct sock change in kernel 2.6

[lijin liu]

Hello everyone!

I am trying to implement a simple tcp server in the kernel. I read the
ktcpvs's source code, but it works under kernel 2.4.

The  struct sock changed in kernel 2.6, I have two questions about the struct:

1. Is sk_wq field in 2.6 equals to sk_sleep field in 2.4?
2. How can I access the tcp accept queue in kernel 2.6? (In kernel
2.4, we could use tp_pinfo.af_tcp.accept_queue, but it was removed in
2.6)


PS: Should sk_receive_queue in the struct sock be used as
tp_pinfo.af_tcp.accept_queue?

Thanks a lot!

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