Hi,
Thanks, Topi.
I tried two things:
First , create a work queue and calling it from the interrupt.
what happens is that queue_work() fails. (The return value from
queue_work() is NOT 1 ).
So I looked into it and found that the problem is that I am in fact in
software interrupt context, not in hw interrupt context.
After looking for solutions and reading about this,I found out that
what I should use for software interrupts is a tasklet.
So I inserted taskets and the tasklet function is indeed called from
the software interrupt context.
The problem is that when I try to send a packet from a tasklet I have the same
error; "sleeping function called from invalid context".
Is there some way out of this ? I mean, to send packets from software
interrupt context ?
Regards,
Mark
On 2/22/07, Mark Ryden <markryde@xxxxxxxxx> wrote:
Hello,
Is it possible somehow to create a TCP socket from kernel and to send
a message when you are in interrupt context ?
I made a test : I created a kernel socket with
sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &sock)
and then connected it with:
sock->ops->connect(sock,
(struct sockaddr*)&addr,
sizeof(struct sockaddr), 0)
When working NOT in interrupt context,it works OK; I called :
kernel_sendmsg(sock, &msg, &iov, 1, length);
and a TCP packet WAS sent (I verified it with a sniffer)
BUT, in interrupt context, I called :
kernel_sendmsg(sock, &msg, &iov, 1, length);
I got:
Feb 22 12:02:54 markhost kernel: BUG: sleeping function called from
invalid context
Feb 22 12:02:54 markhost: in_atomic():1, irqs_disabled():0
Why is it so ? is there another way create a kernel TCP socket
and to send a packet?
Regards,
Mark
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