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69b988c994
This updates "{nl,mac}80211: allow 4addr AP operation on crypto
controlled devices" to the version (v3), which was accepted into
upstream mac80211.git and which is tagged for -stable backporting
(v4.18+).
https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git/commit/?id=33d915d9e8ce811d8958915ccd18d71a66c7c495
Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
[format-patch]
104 lines
4.0 KiB
Diff
104 lines
4.0 KiB
Diff
From 33d915d9e8ce811d8958915ccd18d71a66c7c495 Mon Sep 17 00:00:00 2001
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From: Manikanta Pubbisetty <mpubbise@codeaurora.org>
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Date: Wed, 8 May 2019 14:55:33 +0530
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Subject: [PATCH] {nl,mac}80211: allow 4addr AP operation on crypto controlled
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devices
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As per the current design, in the case of sw crypto controlled devices,
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it is the device which advertises the support for AP/VLAN iftype based
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on it's ability to tranmsit packets encrypted in software
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(In VLAN functionality, group traffic generated for a specific
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VLAN group is always encrypted in software). Commit db3bdcb9c3ff
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("mac80211: allow AP_VLAN operation on crypto controlled devices")
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has introduced this change.
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Since 4addr AP operation also uses AP/VLAN iftype, this conditional
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way of advertising AP/VLAN support has broken 4addr AP mode operation on
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crypto controlled devices which do not support VLAN functionality.
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In the case of ath10k driver, not all firmwares have support for VLAN
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functionality but all can support 4addr AP operation. Because AP/VLAN
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support is not advertised for these devices, 4addr AP operations are
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also blocked.
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Fix this by allowing 4addr operation on devices which do not support
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AP/VLAN iftype but can support 4addr AP operation (decision is based on
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the wiphy flag WIPHY_FLAG_4ADDR_AP).
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Cc: stable@vger.kernel.org
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Fixes: db3bdcb9c3ff ("mac80211: allow AP_VLAN operation on crypto controlled devices")
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Signed-off-by: Manikanta Pubbisetty <mpubbise@codeaurora.org>
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Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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---
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include/net/cfg80211.h | 3 ++-
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net/mac80211/util.c | 4 +++-
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net/wireless/core.c | 6 +++++-
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net/wireless/nl80211.c | 8 ++++++--
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4 files changed, 16 insertions(+), 5 deletions(-)
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--- a/include/net/cfg80211.h
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+++ b/include/net/cfg80211.h
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@@ -3457,7 +3457,8 @@ struct cfg80211_ops {
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* on wiphy_new(), but can be changed by the driver if it has a good
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* reason to override the default
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* @WIPHY_FLAG_4ADDR_AP: supports 4addr mode even on AP (with a single station
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- * on a VLAN interface)
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+ * on a VLAN interface). This flag also serves an extra purpose of
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+ * supporting 4ADDR AP mode on devices which do not support AP/VLAN iftype.
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* @WIPHY_FLAG_4ADDR_STATION: supports 4addr mode even as a station
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* @WIPHY_FLAG_CONTROL_PORT_PROTOCOL: This device supports setting the
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* control port protocol ethertype. The device also honours the
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--- a/net/mac80211/util.c
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+++ b/net/mac80211/util.c
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@@ -3626,7 +3626,9 @@ int ieee80211_check_combinations(struct
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}
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/* Always allow software iftypes */
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- if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
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+ if (local->hw.wiphy->software_iftypes & BIT(iftype) ||
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+ (iftype == NL80211_IFTYPE_AP_VLAN &&
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+ local->hw.wiphy->flags & WIPHY_FLAG_4ADDR_AP)) {
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if (radar_detect)
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return -EINVAL;
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return 0;
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--- a/net/wireless/core.c
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+++ b/net/wireless/core.c
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@@ -1351,8 +1351,12 @@ static int cfg80211_netdev_notifier_call
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}
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break;
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case NETDEV_PRE_UP:
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- if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
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+ if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)) &&
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+ !(wdev->iftype == NL80211_IFTYPE_AP_VLAN &&
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+ rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP &&
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+ wdev->use_4addr))
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return notifier_from_errno(-EOPNOTSUPP);
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+
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if (rfkill_blocked(rdev->rfkill))
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return notifier_from_errno(-ERFKILL);
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break;
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--- a/net/wireless/nl80211.c
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+++ b/net/wireless/nl80211.c
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@@ -3194,8 +3194,7 @@ static int nl80211_new_interface(struct
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return -EINVAL;
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}
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- if (!rdev->ops->add_virtual_intf ||
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- !(rdev->wiphy.interface_modes & (1 << type)))
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+ if (!rdev->ops->add_virtual_intf)
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return -EOPNOTSUPP;
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if ((type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN ||
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@@ -3214,6 +3213,11 @@ static int nl80211_new_interface(struct
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return err;
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}
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+ if (!(rdev->wiphy.interface_modes & (1 << type)) &&
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+ !(type == NL80211_IFTYPE_AP_VLAN && params.use_4addr &&
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+ rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP))
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+ return -EOPNOTSUPP;
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+
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err = nl80211_parse_mon_options(rdev, type, info, ¶ms);
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if (err < 0)
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return err;
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