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cfg80211: allow wiphy specific regdomain management

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Add a new regulatory flag that allows a driver to manage regdomain
changes/updates for its own wiphy.
A self-managed wiphys only employs regulatory information obtained from
the FW and driver and does not use other cfg80211 sources like
beacon-hints, country-code IEs and hints from other devices on the same
system. Conversely, a self-managed wiphy does not share its regulatory
hints with other devices in the system. If a system contains several
devices, one or more of which are self-managed, there might be
contradictory regulatory settings between them. Usage of flag is
generally discouraged. Only use it if the FW/driver is incompatible
with non-locally originated hints.

A new API lets the driver send a complete regdomain, to be applied on
its wiphy only.

After a wiphy-specific regdomain change takes place, usermode will get
a new type of change notification. The regulatory core also takes care
enforce regulatory restrictions, in case some interfaces are on
forbidden channels.

Signed-off-by: Jonathan Doron <jonathanx.doron@intel.com>
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:
Jonathan Doron
2014-12-15 19:26:00 +02:00
committed by Johannes Berg
parent ad30ca2c03
commit b0d7aa5959
8 changed files with 188 additions and 19 deletions
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49
net/wireless/nl80211.c
View File

@@ -11042,25 +11042,9 @@ void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
NL80211_MCGRP_SCAN, GFP_KERNEL);
}
/*
* This can happen on global regulatory changes or device specific settings
* based on custom world regulatory domains.
*/
void nl80211_send_reg_change_event(struct regulatory_request *request)
static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
struct regulatory_request *request)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
if (!hdr) {
nlmsg_free(msg);
return;
}
/* Userspace can always count this one always being set */
if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
goto nla_put_failure;
@@ -11094,6 +11078,35 @@ void nl80211_send_reg_change_event(struct regulatory_request *request)
goto nla_put_failure;
}
return true;
nla_put_failure:
return false;
}
/*
* This can happen on global regulatory changes or device specific settings
* based on custom regulatory domains.
*/
void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
struct regulatory_request *request)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
if (!hdr) {
nlmsg_free(msg);
return;
}
if (nl80211_reg_change_event_fill(msg, request) == false)
goto nla_put_failure;
genlmsg_end(msg, hdr);
rcu_read_lock();