Date: Sat, 02 Nov 2013 21:13:16 +0200 From: clutton <clutton@zoho.com> To: freebsd-wireless@freebsd.org Subject: Re: service netif restart [iface] runs a wpa_supplicant twice Message-ID: <1383419596.3253.42.camel@eva02.mbsd> In-Reply-To: <CAJ-Vmok3vfXfLTcMk%2BRh9_nAL3fP02phw%2BaNjQjbfhQDaLtCew@mail.gmail.com> References: <1382572583.1862.39.camel@eva02.mbsd> <CAJ-VmonD%2B0rEAYm0Zk5HviciJEngTQ2j5xcKPzuNXBH8CWNA7g@mail.gmail.com> <1382589020.1846.36.camel@eva02.mbsd> <CAJ-Vmok=-bWq-eohdJt%2BwcTrJ43cak_sQu_hxO%2Bzt7HauGgg5g@mail.gmail.com> <1383331203.12614.1.camel@eva02.mbsd> <CAAgh0_aq7Mw-4JA6sEa2MoaqjivSNTKkRnfJwuct%2B=v-o4U2kg@mail.gmail.com> <CAJ-VmonRPHaYAKTm8V5Rj2Uc_ONqbTu2wxZrTM%2Buwpkc7RpLTg@mail.gmail.com> <1383336004.13657.18.camel@eva02.mbsd> <CAJ-VmomTsNH=%2BE_HXrSBfq-FLfw_5FqejW2NkH%2BLTKVFMSda4A@mail.gmail.com> <1383338117.13657.53.camel@eva02.mbsd> <CAJ-VmonP63PV%2BoP6feZiRCJrB_fFU3xwK%2Btu%2BB6MR-py4ey_4Q@mail.gmail.com> <1383382815.31973.1.camel@eva02.mbsd> <CAAgh0_biBXGBYSuJN_j0XAk-5aL%2BFi_EyZQCoZ4N7R%2B17BvMDg@mail.gmail.com> <CAJ-Vmok3vfXfLTcMk%2BRh9_nAL3fP02phw%2BaNjQjbfhQDaLtCew@mail.gmail.com>
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On Sat, 2013-11-02 at 10:00 -0700, Adrian Chadd wrote:
> right, this makes it clearer.
>=20
> What about:
>=20
> * the wpa_supplicant rc script only starts/stops one wpa_supplicant insta=
nce
> * upon ethernet / wlan clone creation, use interface_add to add the
> interface to wpa_supplicant
> * upon ethernet / wlan clone destruction, use interface_remove
>=20
> how's that sound?
>=20
>=20
> -adrian
Sounds nice, but firstly we need to figure out this case, and then we
can do adding/removing/whatever
Without fixing that, it would be possible to see
adding/removing/whatever twice.
How to reproduce:
1) put debug info into rc.d/wpa_supplicant, a =C2=ABtoto=C2=BB looks very
informative!
=E2=86=911 ~ =E2=86=92 diff -u /usr/src/etc/rc.d/wpa_supplicant /etc/rc.d/w=
pa_supplicant
--- /usr/src/etc/rc.d/wpa_supplicant 2013-06-19 01:06:53.911196741 +0300
+++ /etc/rc.d/wpa_supplicant 2013-11-02 20:42:02.556222618 +0200
@@ -34,6 +34,8 @@
driver=3D"bsd"
fi
=20
+echo toto >> /tmp/toto
+
load_rc_config $name
=20
command=3D${wpa_supplicant_program}
zsh: exit 1 diff
-u /usr/src/etc/rc.d/wpa_supplicant /etc/rc.d/wpa_supplicant
=E2=86=911 ~ =E2=86=92=20
2) then: service netif restart
3) then: cat /tmp/toto, how many totos do you see?
4) if you are lucky like I am, you can even observe something like this:
root 15038 0.0 0.1 21596 6100 - Ss 8:42pm
0:00.16 /usr/sbin/wpa_supplicant -s -B -i wlan0
-c /etc/wpa_supplicant.conf -D bsd -P /var/run/wpa_supplicant/wlan0.pid
root 15077 0.0 0.1 21596 6112 - Ss 8:42pm
0:00.12 /usr/sbin/wpa_supplicant -s -B -i wlan0
-c /etc/wpa_supplicant.conf -D bsd -P /var/run/wpa_supplicant/wlan0.pid
What was happened? netif tries to setup wlan0 (clone, wpa, dhcp, etc),
when wlan0 interface occurs, devd runs another copy of netif.
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