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cfg80211: return private regdom for self-managed devices

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If a device has self-managed regulatory, insist on returning the wiphy
specific regdomain if a wiphy-idx is specified. The global regdomain is
meaningless for such devices.

Also add an attribute for self-managed devices, so usermode can
distinguish them as such.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Reviewed-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Arik Nemtsov 2014-12-15 19:26:01 +02:00 committed by Johannes Berg
parent b0d7aa5959
commit 1bdd716cbc
2 changed files with 34 additions and 0 deletions
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10
include/uapi/linux/nl80211.h
View File

@ -261,6 +261,9 @@
* the regulatory core to help with compliance. A dump version of this API
* is now available which will returns the global regdomain as well as
* all private regdomains of present wiphys (for those that have it).
* If a wiphy is self-managed (%NL80211_ATTR_WIPHY_SELF_MANAGED_REG), then
* its private regdomain is the only valid one for it. The regulatory
* core is not used to help with compliance in this case.
* @NL80211_CMD_SET_REG: Set current regulatory domain. CRDA sends this command
* after being queried by the kernel. CRDA replies by sending a regulatory
* domain structure which consists of %NL80211_ATTR_REG_ALPHA set to our
@ -1702,6 +1705,11 @@ enum nl80211_commands {
*
* @NL80211_ATTR_MAC_MASK: MAC address mask
*
* @NL80211_ATTR_WIPHY_SELF_MANAGED_REG: flag attribute indicating this device
* is self-managing its regulatory information and any regulatory domain
* obtained from it is coming from the device's wiphy and not the global
* cfg80211 regdomain.
*
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@ -2059,6 +2067,8 @@ enum nl80211_attrs {
NL80211_ATTR_MAC_MASK,
NL80211_ATTR_WIPHY_SELF_MANAGED_REG,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,

24
net/wireless/nl80211.c
View File

@ -396,6 +396,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
[NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
[NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
[NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
};
/* policy for the key attributes */
@ -1701,6 +1702,10 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
rdev->wiphy.max_num_csa_counters))
goto nla_put_failure;
if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
goto nla_put_failure;
/* done */
state->split_start = 0;
break;
@ -5406,6 +5411,8 @@ static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
goto put_failure;
if (info->attrs[NL80211_ATTR_WIPHY]) {
bool self_managed;
rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
if (IS_ERR(rdev)) {
nlmsg_free(msg);
@ -5413,8 +5420,16 @@ static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
}
wiphy = &rdev->wiphy;
self_managed = wiphy->regulatory_flags &
REGULATORY_WIPHY_SELF_MANAGED;
regdom = get_wiphy_regdom(wiphy);
/* a self-managed-reg device must have a private regdom */
if (WARN_ON(!regdom && self_managed)) {
nlmsg_free(msg);
return -EINVAL;
}
if (regdom &&
nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
goto nla_put_failure;
@ -5471,6 +5486,10 @@ static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
goto nla_put_failure;
if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
goto nla_put_failure;
return genlmsg_end(msg, hdr);
nla_put_failure:
@ -11076,6 +11095,11 @@ static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
if (wiphy &&
nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
goto nla_put_failure;
if (wiphy &&
wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
goto nla_put_failure;
}
return true;