>> create a sysfs entry for netconsole in /sys/class/misc.
>> This entry has elements related to netconsole as follows.
>> You can change configuration of netconsole(writable attributes such as IP
>> address, port number and so on) and check current configuration of netconsole.
>>
>> -+- /sys/class/misc/
>> |-+- netconsole/
>> |-+- port1/
>> | |--- id [r--r--r--] unique port id
>> | |--- remove [-w-------] if you write something to "remove",
>> | | this port is removed.
>>
> IMHO this kind of "magic side effect" is a misuse of sysfs. and would
> make proper locking
> impossible. How do you deal with the dangling reference to the
> netconsole object?
I manage the reference by using a list.
If you write something to "remove",
firstly the port entry is removed from sysfs and then
the reference is removed from the list and a resource of the port is freed.
> f= open (... netconsole/port1/remove")
> write(f, "", 1)
> sleep(2)
> write(f, "", 1) .... this probably would crash...
>
>
> Maybe having a state variable/sysfs file so you could setup the port and
> turn it on/off with write.
You are right.
When I tested above program, my machine crashed.
I'm going to rethink the interface for netconsole.
Thanks for your comments.
--
Keiichi KII
NEC Corporation OSS Promotion Center
E-mail: [email protected]
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
