package/kernel/mac80211/patches/subsys/390-nl-mac-80211-allow-4addr-AP-operation-on-crypto-cont.patch

   1 From 33d915d9e8ce811d8958915ccd18d71a66c7c495 Mon Sep 17 00:00:00 2001
   2 From: Manikanta Pubbisetty <mpubbise@codeaurora.org>
   3 Date: Wed, 8 May 2019 14:55:33 +0530
   4 Subject: [PATCH] {nl,mac}80211: allow 4addr AP operation on crypto controlled
   5  devices
   6
   7 As per the current design, in the case of sw crypto controlled devices,
   8 it is the device which advertises the support for AP/VLAN iftype based
   9 on it's ability to tranmsit packets encrypted in software
  10 (In VLAN functionality, group traffic generated for a specific
  11 VLAN group is always encrypted in software). Commit db3bdcb9c3ff
  12 ("mac80211: allow AP_VLAN operation on crypto controlled devices")
  13 has introduced this change.
  14
  15 Since 4addr AP operation also uses AP/VLAN iftype, this conditional
  16 way of advertising AP/VLAN support has broken 4addr AP mode operation on
  17 crypto controlled devices which do not support VLAN functionality.
  18
  19 In the case of ath10k driver, not all firmwares have support for VLAN
  20 functionality but all can support 4addr AP operation. Because AP/VLAN
  21 support is not advertised for these devices, 4addr AP operations are
  22 also blocked.
  23
  24 Fix this by allowing 4addr operation on devices which do not support
  25 AP/VLAN iftype but can support 4addr AP operation (decision is based on
  26 the wiphy flag WIPHY_FLAG_4ADDR_AP).
  27
  28 Cc: stable@vger.kernel.org
  29 Fixes: db3bdcb9c3ff ("mac80211: allow AP_VLAN operation on crypto controlled devices")
  30 Signed-off-by: Manikanta Pubbisetty <mpubbise@codeaurora.org>
  31 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  32 ---
  33  include/net/cfg80211.h | 3 ++-
  34  net/mac80211/util.c    | 4 +++-
  35  net/wireless/core.c    | 6 +++++-
  36  net/wireless/nl80211.c | 8 ++++++--
  37  4 files changed, 16 insertions(+), 5 deletions(-)
  38
  39 --- a/include/net/cfg80211.h
  40 +++ b/include/net/cfg80211.h
  41 @@ -3767,7 +3767,8 @@ struct cfg80211_ops {
  42   *     on wiphy_new(), but can be changed by the driver if it has a good
  43   *     reason to override the default
  44   * @WIPHY_FLAG_4ADDR_AP: supports 4addr mode even on AP (with a single station
  45 - *     on a VLAN interface)
  46 + *     on a VLAN interface). This flag also serves an extra purpose of
  47 + *     supporting 4ADDR AP mode on devices which do not support AP/VLAN iftype.
  48   * @WIPHY_FLAG_4ADDR_STATION: supports 4addr mode even as a station
  49   * @WIPHY_FLAG_CONTROL_PORT_PROTOCOL: This device supports setting the
  50   *     control port protocol ethertype. The device also honours the
  51 --- a/net/mac80211/util.c
  52 +++ b/net/mac80211/util.c
  53 @@ -3760,7 +3760,9 @@ int ieee80211_check_combinations(struct
  54         }
  55
  56         /* Always allow software iftypes */
  57 -       if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
  58 +       if (local->hw.wiphy->software_iftypes & BIT(iftype) ||
  59 +           (iftype == NL80211_IFTYPE_AP_VLAN &&
  60 +            local->hw.wiphy->flags & WIPHY_FLAG_4ADDR_AP)) {
  61                 if (radar_detect)
  62                         return -EINVAL;
  63                 return 0;
  64 --- a/net/wireless/core.c
  65 +++ b/net/wireless/core.c
  66 @@ -1412,8 +1412,12 @@ static int cfg80211_netdev_notifier_call
  67                 }
  68                 break;
  69         case NETDEV_PRE_UP:
  70 -               if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
  71 +               if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)) &&
  72 +                   !(wdev->iftype == NL80211_IFTYPE_AP_VLAN &&
  73 +                     rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP &&
  74 +                     wdev->use_4addr))
  75                         return notifier_from_errno(-EOPNOTSUPP);
  76 +
  77                 if (rfkill_blocked(rdev->rfkill))
  78                         return notifier_from_errno(-ERFKILL);
  79                 break;
  80 --- a/net/wireless/nl80211.c
  81 +++ b/net/wireless/nl80211.c
  82 @@ -3387,8 +3387,7 @@ static int nl80211_new_interface(struct
  83         if (info->attrs[NL80211_ATTR_IFTYPE])
  84                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
  85
  86 -       if (!rdev->ops->add_virtual_intf ||
  87 -           !(rdev->wiphy.interface_modes & (1 << type)))
  88 +       if (!rdev->ops->add_virtual_intf)
  89                 return -EOPNOTSUPP;
  90
  91         if ((type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN ||
  92 @@ -3407,6 +3406,11 @@ static int nl80211_new_interface(struct
  93                         return err;
  94         }
  95
  96 +       if (!(rdev->wiphy.interface_modes & (1 << type)) &&
  97 +           !(type == NL80211_IFTYPE_AP_VLAN && params.use_4addr &&
  98 +             rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP))
  99 +               return -EOPNOTSUPP;
 100 +
 101         err = nl80211_parse_mon_options(rdev, type, info, &params);
 102         if (err < 0)
 103                 return err;