On Friday, March 17, 2017 10:30:24 AM EDT Arend Van Spriel wrote:
> On 17-3-2017 10:06, Arend Van Spriel wrote:
> > On 16-3-2017 22:51, Mark Asselstine wrote:
> >> On Tuesday, March 14, 2017 9:51:52 PM EDT Arend van Spriel wrote:
> >>> To support network namespace the driver must assure all created
> >>> network interfaces are in the same namespace as the wiphy instance.
> >>>
> >>> Reported-by: Mark Asselstine <mark.asselst...@windriver.com>
> >>> Signed-off-by: Arend van Spriel <arend.vanspr...@broadcom.com>
> >>> ---
> >>> Hi Mark,
> >>>
> >>> Please check this patch. I can not say I am an expert when it comes
> >>> to using namespaces. So let me know if it works and I can change
> >>> Reported-by into Tested-by.
> >>
> >> Seems to pass the tests I threw at it. Seems happy with namespaces.
> >
> > I tested it myself and noticed something unexpected. Upon changing from
> > &init_net to brcm-wifi the wdev id has changed from 0x1 to 0x2 (see
> > below) and upon going from brcm-wifi to &init_net both interface change
> > their wdev id.
>
> Hi Johannes,
>
> Seems we get a NETDEV_REGISTER notification when changing to other
> namespace thus increasing the struct wireless_dev::identifier.
>
> # insmod brcmfmac
> [253715.650567] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0:
> Feb 28 2017 12:44:14 version 7.112.21 (TOB) (r588403) FWID 01-3439bdc5
> [253715.669388] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166
> code (0x30 0x30)
> [253715.698289] ieee80211 phy0: wdev id changed: 0 -> 1
> [253715.704032] brcmfmac 0000:02:00.0 wlan3: renamed from wlan0
> [253715.732362] systemd-udevd[21461]: renamed network interface wlan0 to
> wlan3
> [253715.779859] IPv6: ADDRCONF(NETDEV_UP): wlan3: link is not ready
> [253721.326349] IPv6: ADDRCONF(NETDEV_CHANGE): wlan3: link becomes ready
> # iw phy0 set netns 21499
> [253788.877846] ieee80211 phy0: wdev id changed: 1 -> 2
> [253788.886710] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166
> code (0x30 0x30)
>
> I guess this is intended behavior?
I had thought this was intended behavior as well but I see that a patch is
already prepped and tested to make this not happen. At any rate it wasn't
appearing to affect my usecase.
Mark
>
> Regards,
> Arend
>
> > Regards,
> > Arend
> >
> > Terminal 1 Terminal 2
> > -------------------------- ---------------------------------
> > # ip netns add brcm-wifi
> >
> > # iw dev
> > phy#0
> >
> > Interface wlan3
> >
> > ifindex 11
> > wdev 0x1
> >
> > # ip netns exec brcm-wifi bash
> > # iw dev
> > # echo $$
> > 20337
> >
> > # iw phy0 set netns 20337
> >
> > # iw dev
> > phy#0
> >
> > Interface wlan3
> >
> > ifindex 11
> > *wdev 0x2*
> >
> > # iw phy0 interface add wl3.ap type __ap
> > # iw dev
> > phy#0
> >
> > Interface wl3.ap
> >
> > ifindex 2
> > wdev 0x3
> >
> > Interface wlan3
> >
> > ifindex 11
> > wdev 0x2
> >
> > # iw dev
> >
> > # iw phy0 set netns 1
> > # iw dev
> >
> > # iw dev
> > phy#0
> >
> > Interface wl3.ap
> >
> > ifindex 12
> > *wdev 0x5*
> >
> > Interface wlan3
> >
> > ifindex 11
> > *wdev 0x4*
> >>
> >> Mark
> >>
> >>> Regards,
> >>> Arend
> >>> ---
> >>>
> >>> drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 3 ++-
> >>> drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c | 5 ++++-
> >>> 2 files changed, 6 insertions(+), 2 deletions(-)
> >>>
> >>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> >>> b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c index
> >>> 3856de6..e0d65df 100644
> >>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> >>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> >>> @@ -6450,7 +6450,8 @@ static int brcmf_setup_wiphy(struct wiphy *wiphy,
> >>> struct brcmf_if *ifp) BIT(NL80211_BSS_SELECT_ATTR_BAND_PREF) |
> >>>
> >>> BIT(NL80211_BSS_SELECT_ATTR_RSSI_ADJUST);
> >>>
> >>> - wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT |
> >>> + wiphy->flags |= WIPHY_FLAG_NETNS_OK |
> >>> + WIPHY_FLAG_PS_ON_BY_DEFAULT |
> >>>
> >>> WIPHY_FLAG_OFFCHAN_TX |
> >>> WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
> >>>
> >>> if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_TDLS))
> >>>
> >>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
> >>> b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c index
> >>> 22b4883..74ede27 100644
> >>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
> >>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
> >>> @@ -463,6 +463,7 @@ static int brcmf_netdev_open(struct net_device
> >>> *ndev)
> >>>
> >>> int brcmf_net_attach(struct brcmf_if *ifp, bool rtnl_locked)
> >>> {
> >>>
> >>> struct brcmf_pub *drvr = ifp->drvr;
> >>>
> >>> + struct wiphy *wiphy;
> >>>
> >>> struct net_device *ndev;
> >>> s32 err;
> >>>
> >>> @@ -476,8 +477,10 @@ int brcmf_net_attach(struct brcmf_if *ifp, bool
> >>> rtnl_locked) ndev->needed_headroom += drvr->hdrlen;
> >>>
> >>> ndev->ethtool_ops = &brcmf_ethtool_ops;
> >>>
> >>> - /* set the mac address */
> >>> + /* set the mac address & netns */
> >>>
> >>> memcpy(ndev->dev_addr, ifp->mac_addr, ETH_ALEN);
> >>>
> >>> + wiphy = cfg_to_wiphy(drvr->config);
> >>> + dev_net_set(ndev, wiphy_net(wiphy));
> >>>
> >>> INIT_WORK(&ifp->multicast_work, _brcmf_set_multicast_list);
> >>> INIT_WORK(&ifp->ndoffload_work, _brcmf_update_ndtable);
