... You can then use the socket directly in the kernel...
Is this valid also when this socket is used by separate kernel thread ?
It is different than thread which runs in ioctl and provides socket.
Peter
On Tue, Mar 11, 2025 at 03:08:15PM +0100, Peter Skvarka wrote:
> > ... You can then use the socket directly in the kernel...
>
> Is this valid also when this socket is used by separate kernel thread ?
> It is different than thread which runs in ioctl and provides socket.
There is nothing thread-l
Hello,
I have created two sockets with socketpair() and one of them is put into
kernel module through ioctl.
I need to work with passed socket in separate kernel thread.
In my module ioctl handler I am able to retrieve file descriptor from
user mode descriptor (int user_sock) :
file_fd = fd_ge
On Tue, Mar 11, 2025 at 2:17 AM Christoph Badura wrote:
>
> On Mon, Mar 10, 2025 at 04:43:30PM +0200, Andrius V wrote:
> > Taylor has a good analysis and explanation of the issue
> > https://mail-index.netbsd.org/netbsd-bugs/2024/03/26/msg082202.html,
> > which I also noticed by testing ATA RAID s
> I have created two sockets with socketpair() and one of them is put
> into kernel module through ioctl. [...] I am able to retrieve file
> descriptor from user mode descriptor (int user_sock) :
> file_fd = fd_getfile2(lewepe->l_proc, user_sock);
Minor terminological point: the term "file descr
> On Mar 11, 2025, at 2:20 AM, Peter Skvarka wrote:
>
> Hello,
> I have created two sockets with socketpair() and one of them is put into
> kernel module through ioctl.
> I need to work with passed socket in separate kernel thread.
> In my module ioctl handler I am able to retrieve file descr
mo...@rodents-montreal.org (Mouse) writes:
>> My question is:
>> Can I use such retrieved file_fd or struct socket* so in separate
>> kernel thread ?
>I see no reason why not - but that is not at all the same as "yes". I
>do not work with multiple threads often enough to feel confident of my
>an
Resolved, vmspace initialization was missing.
I used uio_setup_sysspace(&my_uio);
Now I am seeing message in kernel which was sent through socket pair
from user space.
Thanks for all your detailed answers.
Peter
Hi,
For the last week I am working on the fix for the ataraid(4) related
to the bug reported in kern/43986 and partially to kern/59130 (hits
same issue due to different bug).
Taylor has a good analysis and explanation of the issue
https://mail-index.netbsd.org/netbsd-bugs/2024/03/26/msg082202.htm
Thanks for detailed answer.
With help of your description I reached valid file_t* file_fd in kernel
module.
In kernel module I used file_fd = fd_getfile2(lwp_ptr->l_proc, user_fd);
which encapsulates your older code.
Also test for descriptor type:
if(file_fd->f_type != DTYPE_SOCKET) {...} is o
> [...reached the point of having the struct socket *...]
> What I cannot resolve is which function to use for receiving data
> sent from user mode on retrieved file_fd in kernel module. When I
> tried soo_read(file_fd,...) then OS freezes and need to reboot. I
> call soo_read() in kernel thread
Could you break into ddb? A stack trace of the freeze might be useful.
Two things:
1. I have NetBSD 10.1. I found crash dump:
crash> bt
__kernel_end() at 0
kern_reboot() at sys_reboot
vpanic() at vpanic+0x192
panic() at device_printf
trap() at startlwp
--- trap (number 6) ---
uiomove() at u
On Tue, Mar 11, 2025 at 07:21:47PM +0100, Vasyl Maksym Lanko wrote:
> 1. Is this mostly correct?
It is. In my opinion your second scenario is the path of least
resistance.
> 2. Is this project mostly about identifying the missing syscall used in a
> Linux Binary and porting it to NetBSD?
That is
Hello,
I need to add kernel thread which starts in kernel module after modload
and finishes on modunload.
I am looking into sys/lwp.h and kern/kern_lwp.c. on lwp..() prototypes
and I have many questions on it.
Does exist any example which can help to understand how to properly use
this inte
>> Could you break into ddb? A stack trace of the freeze might be useful.
> 1. I have NetBSD 10.1.
Okay. That limits the amount I can help with details, since I don't
run it. (Even at work, the latest NetBSD I use is 9.1.)
> I found crash dump:
> crash> bt
> __kernel_end() at 0
> kern_reboot(
Hello!
I have some questions about GSOC - Emulating missing linux syscalls (
https://wiki.netbsd.org/projects/project/linux_timer/ ).
I have been using Linux for some years but never touched NetBSD, so I'm
going to describe the project using Linux names/tools instead.
"Not all Linux syscalls a
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