kobj_uevent: Ignore if some listeners cannot handle message
On 08/22/2011 09:49 PM, Eric W. Biederman wrote:
> Milan Broz <email@example.com> writes:
>> kobject_uevent() uses a multicast socket and should ignore
>> if one of listeners cannot handle messages or nobody is
>> listening at all.
>> Easily reproducible when a process in system is cloned
>> with CLONE_NEWNET flag.
>> (See also
> I am fine with the patch below.
> However if you are fine with the patch below let's just remove the
> return code from code from kobject_uevent_env. We are now explicitly
> ignoring all of the possible return codes from
Until someone adds a new errno there, I think ESRCH appeared there
the same way:-)
I think the code is better readable now. Whatever, I do not care,
patch is intended to be minimalistic (perhaps for stable series as well now).
> Ignoring all of the return codes from netlink_broadcast_filtered ignores
> all of the expected errors from kobject_uevent_env, short of programmer
> So why have an error code on kobject_uevent_env?
>> Signed-off-by: Milan Broz <firstname.lastname@example.org>
>> lib/kobject_uevent.c | 2 +-
>> 1 files changed, 1 insertions(+), 1 deletions(-)
>> diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
>> index 70af0a7..ad72a03 100644
>> --- a/lib/kobject_uevent.c
>> +++ b/lib/kobject_uevent.c
>> @@ -282,7 +282,7 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
>> /* ENOBUFS should be handled in userspace */
>> - if (retval == -ENOBUFS)
>> + if (retval == -ENOBUFS || retval == -ESRCH)
>> retval = 0;
>> } else
>> retval = -ENOMEM;
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