From: cedric Voncken <cedric.voncken@xxxxxxxxx>
If the VLAN tci is set in skb->vlan_tci use the priority field to determine the WMM priority.
Signed-off-by: cedric Voncken <cedric.voncken@xxxxxxxxx>
---
net/wireless/util.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
V2 modifications:
Fix indentation
Use symbolic constant
include the header linux/if_vlan.h
V3 modifications:
Check the vlan_tci validity with macro vlan_tx_tag_present
Get the vlan_tci field value with macro vlan_tx_tag_get
Request to netdev mailling list to know if the VLAN priority value 0 must be treated as no priority request. I add the Ben Hutchings reply below:
IEEE 802.1q refers to the definition in 802.1d:
> The user_priority parameter is the priority requested by the
> originating service user. The value of this parameter is in the range
> 0 through 7.
>
> NOTE -- The default user_priority value is 0. Values 1 through 7 form an
> ordered sequence of user_priorities, with 1 being the lowest value and
> 7 the highest. See 7.7.3 and Annex G (informative) for further
> explanation of the use of user_priority values.
So a value of 0 should be treated as no priority request, same as for an untagged frame.
V4 modifications:
Fix patch format
diff --git a/net/wireless/util.c b/net/wireless/util.c
index ce090c1..9e4cac2 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -10,6 +10,7 @@
#include <net/cfg80211.h>
#include <net/ip.h>
#include <net/dsfield.h>
+#include <linux/if_vlan.h>
#include "core.h"
#include "rdev-ops.h"
@@ -691,6 +692,7 @@ EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
unsigned int cfg80211_classify8021d(struct sk_buff *skb)
{
unsigned int dscp;
+ unsigned char vlan_priority;
/* skb->priority values from 256->263 are magic values to
* directly indicate a specific 802.1d priority. This is used
@@ -700,6 +702,13 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb)
if (skb->priority >= 256 && skb->priority <= 263)
return skb->priority - 256;
+ if (vlan_tx_tag_present(skb)) {
+ vlan_priority = (vlan_tx_tag_get(skb) & VLAN_PRIO_MASK)
+ >> VLAN_PRIO_SHIFT;
+ if (vlan_priority > 0)
+ return vlan_priority;
+ }
+
switch (skb->protocol) {
case htons(ETH_P_IP):
dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
--
1.7.2.5
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