[v2,4/4] cfg80211: Allow usermode to query wiphy specific regd info

Message ID	1415895219-19848-4-git-send-email-arik@wizery.com (mailing list archive)
State	Not Applicable, archived
Headers	show Return-Path: <linux-wireless-owner@kernel.org> From: Arik Nemtsov <arik@wizery.com> To: <linux-wireless@vger.kernel.org> Cc: "Luis R. Rodriguez" <mcgrof@suse.com>, Jonathan Doron <jond@wizery.com> Subject: [PATCH v2 4/4] cfg80211: Allow usermode to query wiphy specific regd info Date: Thu, 13 Nov 2014 18:13:39 +0200 Message-Id: <1415895219-19848-4-git-send-email-arik@wizery.com> In-Reply-To: <1415895219-19848-1-git-send-email-arik@wizery.com> References: <1415895219-19848-1-git-send-email-arik@wizery.com> Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk

diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index f050dcb..9c996bc 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -1674,6 +1674,10 @@ enum nl80211_commands { * @NL80211_ATTR_SMPS_MODE: SMPS mode to use (ap mode). see * &enum nl80211_smps_mode. * + * @NL80211_ATTR_WIPHY_SELF_MANAGED_REG: flag attribute indicating the + * regulatory information came from the driver and not from the global + * cfg80211 regulatory domain information. + * * @NL80211_ATTR_MAX: highest attribute number currently defined * @__NL80211_ATTR_AFTER_LAST: internal use */ @@ -2026,6 +2030,8 @@ enum nl80211_attrs { NL80211_ATTR_SMPS_MODE, + NL80211_ATTR_WIPHY_SELF_MANAGED_REG, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 3a422e6..f1f632c 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -395,6 +395,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = { [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 }, [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 }, [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 }, + [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG }, }; /* policy for the key attributes */ @@ -5287,14 +5288,24 @@ static int nl80211_update_mesh_config(struct sk_buff *skb, static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info) { - const struct ieee80211_regdomain *regdom; + const struct ieee80211_regdomain *regdom = NULL; + struct cfg80211_registered_device *rdev; struct sk_buff *msg; void *hdr = NULL; struct nlattr *nl_reg_rules; unsigned int i; - if (!cfg80211_regdomain) - return -EINVAL; + if (info->attrs[NL80211_ATTR_WIPHY] != NULL) { + struct wiphy *wiphy; + + rdev = cfg80211_get_dev_from_info(genl_info_net(info), info); + if (IS_ERR(rdev)) + return PTR_ERR(rdev); + + wiphy = &rdev->wiphy; + if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) + regdom = get_wiphy_regdom(wiphy); + } msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) @@ -5305,13 +5316,27 @@ static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info) if (!hdr) goto put_failure; - if (reg_last_request_cell_base() && - nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE, - NL80211_USER_REG_HINT_CELL_BASE)) - goto nla_put_failure; + if (!regdom) { + if (!cfg80211_regdomain) { + nlmsg_free(msg); + return -EINVAL; + } + + if (reg_last_request_cell_base() && + nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE, + NL80211_USER_REG_HINT_CELL_BASE)) + goto nla_put_failure; + } else { + if (nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG)) + goto nla_put_failure; + if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx)) + goto nla_put_failure; + } rcu_read_lock(); - regdom = rcu_dereference(cfg80211_regdomain); + + if (regdom == NULL) + regdom = rcu_dereference(cfg80211_regdomain); if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) || (regdom->dfs_region && @@ -10687,9 +10712,16 @@ static bool nl80211_reg_change_event_fill(struct sk_buff *msg, goto nla_put_failure; } - if (request->wiphy_idx != WIPHY_IDX_INVALID && - nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx)) - goto nla_put_failure; + if (request->wiphy_idx != WIPHY_IDX_INVALID) { + struct wiphy *wiphy; + + wiphy = wiphy_idx_to_wiphy(request->wiphy_idx); + if ((wiphy != NULL) && + nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx) && + (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && + (nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))) + goto nla_put_failure; + } return true; diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 4ee282d..a5f32d5 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -142,7 +142,7 @@ static const struct ieee80211_regdomain *get_cfg80211_regdom(void) return rtnl_dereference(cfg80211_regdomain); } -static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) +const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) { return rtnl_dereference(wiphy->regd); } diff --git a/net/wireless/reg.h b/net/wireless/reg.h index 5e48031..4b45d6e 100644 --- a/net/wireless/reg.h +++ b/net/wireless/reg.h @@ -38,6 +38,7 @@ unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, const struct ieee80211_reg_rule *rule); bool reg_last_request_cell_base(void); +const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy); /** * regulatory_hint_found_beacon - hints a beacon was found on a channel

[v2,4/4] cfg80211: Allow usermode to query wiphy specific regd info

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