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net: dsa: tag_8021q: introduce a vid_is_dsa_8021q helper

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This function returns a boolean denoting whether the VLAN passed as
argument is part of the 1024-3071 range that the dsa_8021q tagging
scheme uses.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2020-05-12 20:20:26 +03:00 committed by David S. Miller
parent 54a0ed0df4
commit 1f66b0f0ae
2 changed files with 14 additions and 0 deletions
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7
include/linux/dsa/8021q.h
View File

@ -50,6 +50,8 @@ int dsa_8021q_rx_switch_id(u16 vid);
int dsa_8021q_rx_source_port(u16 vid);
bool vid_is_dsa_8021q(u16 vid);
#else
int dsa_port_setup_8021q_tagging(struct dsa_switch *ds, int index,
@ -107,6 +109,11 @@ int dsa_8021q_rx_source_port(u16 vid)
return 0;
}
bool vid_is_dsa_8021q(u16 vid)
{
return false;
}
#endif /* IS_ENABLED(CONFIG_NET_DSA_TAG_8021Q) */
#endif /* _NET_DSA_8021Q_H */

7
net/dsa/tag_8021q.c
View File

@ -93,6 +93,13 @@ int dsa_8021q_rx_source_port(u16 vid)
}
EXPORT_SYMBOL_GPL(dsa_8021q_rx_source_port);
bool vid_is_dsa_8021q(u16 vid)
{
return ((vid & DSA_8021Q_DIR_MASK) == DSA_8021Q_DIR_RX ||
(vid & DSA_8021Q_DIR_MASK) == DSA_8021Q_DIR_TX);
}
EXPORT_SYMBOL_GPL(vid_is_dsa_8021q);
static int dsa_8021q_restore_pvid(struct dsa_switch *ds, int port)
{
struct bridge_vlan_info vinfo;