thr3ads.net - Linux Ethernet Bridging - [Bridge] [PATCH net-next 0/4] net: bridge: vlan options: add support for tunnel mapping [Mar 2020]

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Nikolay Aleksandrov

2020-Mar-17 12:08 UTC

[Bridge] [PATCH net-next 0/4] net: bridge: vlan options: add support for tunnel mapping

Hi,
In order to bring the new vlan API on par with the old one and be able
to completely migrate to the new one we need to support vlan tunnel mapping
and statistics. This patch-set takes care of the former by making it a
vlan option. There are two notable issues to deal with:
 - vlan range to tunnel range mapping
   * The tunnel ids are globally unique for the vlan code and a vlan can
     be mapped to one tunnel, so the old API took care of ranges by
     taking the starting tunnel id value and incrementally mapping
     vlan id(i) -> tunnel id(i). This set takes the same approach and
     uses one new attribute - BRIDGE_VLANDB_ENTRY_TUNNEL_ID. If used
     with a vlan range then it's the starting tunnel id to map.

 - tunnel mapping removal
   * Since there are no reserved/special tunnel ids defined, we can't
     encode mapping removal within the new attribute, in order to be
     able to remove a mapping we add a vlan flag which makes the new
     tunnel option remove the mapping

The rest is pretty straight-forward, in fact we directly re-use the old
code for manipulating tunnels by just mapping the command (set/del). In
order to be able to keep detecting vlan ranges we check that the current
vlan has a tunnel and it's extending the current vlan range end's tunnel
id.

Thanks,
 Nik


Nikolay Aleksandrov (4):
  net: bridge: vlan options: rename br_vlan_opts_eq to
    br_vlan_opts_eq_range
  net: bridge: vlan tunnel: constify bridge and port arguments
  net: bridge: vlan options: add support for tunnel id dumping
  net: bridge: vlan options: add support for tunnel mapping set/del

 include/uapi/linux/if_bridge.h |  2 +
 net/bridge/br_netlink_tunnel.c | 12 +++---
 net/bridge/br_private.h        |  4 +-
 net/bridge/br_private_tunnel.h | 17 +++++---
 net/bridge/br_vlan.c           |  3 +-
 net/bridge/br_vlan_options.c   | 74 +++++++++++++++++++++++++++++++---
 net/bridge/br_vlan_tunnel.c    |  5 ++-
 7 files changed, 94 insertions(+), 23 deletions(-)

-- 
2.24.1

Nikolay Aleksandrov

2020-Mar-17 12:08 UTC

head link

[Bridge] [PATCH net-next 1/4] net: bridge: vlan options: rename br_vlan_opts_eq to br_vlan_opts_eq_range

It is more appropriate name as it shows the intent of why we need to
check the options' state. It also allows us to give meaning to the two
arguments of the function: the first is the current vlan (v_curr) being
checked if it could enter the range ending in the second one (range_end).

Signed-off-by: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
---
 net/bridge/br_private.h      | 4 ++--
 net/bridge/br_vlan.c         | 2 +-
 net/bridge/br_vlan_options.c | 8 ++++----
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 5153ffe79a01..1f97703a52ff 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -1199,8 +1199,8 @@ static inline void br_vlan_notify(const struct net_bridge
*br,
 
 /* br_vlan_options.c */
 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
-bool br_vlan_opts_eq(const struct net_bridge_vlan *v1,
-		     const struct net_bridge_vlan *v2);
+bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
+			   const struct net_bridge_vlan *range_end);
 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
 size_t br_vlan_opts_nl_size(void);
 int br_vlan_process_options(const struct net_bridge *br,
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 6b5deca08b89..09bfda47fbbf 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -1694,7 +1694,7 @@ bool br_vlan_can_enter_range(const struct net_bridge_vlan
*v_curr,
 {
 	return v_curr->vid - range_end->vid == 1 &&
 	       range_end->flags == v_curr->flags &&
-	       br_vlan_opts_eq(v_curr, range_end);
+	       br_vlan_opts_eq_range(v_curr, range_end);
 }
 
 static int br_vlan_dump_dev(const struct net_device *dev,
diff --git a/net/bridge/br_vlan_options.c b/net/bridge/br_vlan_options.c
index cd2eb194eb98..24cf2a621df9 100644
--- a/net/bridge/br_vlan_options.c
+++ b/net/bridge/br_vlan_options.c
@@ -7,11 +7,11 @@
 
 #include "br_private.h"
 
-/* check if the options between two vlans are equal */
-bool br_vlan_opts_eq(const struct net_bridge_vlan *v1,
-		     const struct net_bridge_vlan *v2)
+/* check if the options' state of v_curr allow it to enter the range */
+bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
+			   const struct net_bridge_vlan *range_end)
 {
-	return v1->state == v2->state;
+	return v_curr->state == range_end->state;
 }
 
 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v)
-- 
2.24.1

Nikolay Aleksandrov

2020-Mar-17 12:08 UTC

head link

[Bridge] [PATCH net-next 2/4] net: bridge: vlan tunnel: constify bridge and port arguments

The vlan tunnel code changes vlan options, it shouldn't touch port or
bridge options so we can constify the port argument. This would later help
us to re-use these functions from the vlan options code.

Signed-off-by: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
---
 net/bridge/br_netlink_tunnel.c |  6 +++---
 net/bridge/br_private_tunnel.h | 13 +++++++------
 net/bridge/br_vlan_tunnel.c    |  5 +++--
 3 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/net/bridge/br_netlink_tunnel.c b/net/bridge/br_netlink_tunnel.c
index afee292fb004..beea08b8c422 100644
--- a/net/bridge/br_netlink_tunnel.c
+++ b/net/bridge/br_netlink_tunnel.c
@@ -193,7 +193,7 @@ static const struct nla_policy
vlan_tunnel_policy[IFLA_BRIDGE_VLAN_TUNNEL_MAX +
 	[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS] = { .type = NLA_U16 },
 };
 
-static int br_vlan_tunnel_info(struct net_bridge_port *p, int cmd,
+static int br_vlan_tunnel_info(const struct net_bridge_port *p, int cmd,
 			       u16 vid, u32 tun_id, bool *changed)
 {
 	int err = 0;
@@ -250,8 +250,8 @@ int br_parse_vlan_tunnel_info(struct nlattr *attr,
 	return 0;
 }
 
-int br_process_vlan_tunnel_info(struct net_bridge *br,
-				struct net_bridge_port *p, int cmd,
+int br_process_vlan_tunnel_info(const struct net_bridge *br,
+				const struct net_bridge_port *p, int cmd,
 				struct vtunnel_info *tinfo_curr,
 				struct vtunnel_info *tinfo_last,
 				bool *changed)
diff --git a/net/bridge/br_private_tunnel.h b/net/bridge/br_private_tunnel.h
index 2bdef2ea3420..a9b818fc8b6c 100644
--- a/net/bridge/br_private_tunnel.h
+++ b/net/bridge/br_private_tunnel.h
@@ -18,8 +18,8 @@ struct vtunnel_info {
 /* br_netlink_tunnel.c */
 int br_parse_vlan_tunnel_info(struct nlattr *attr,
 			      struct vtunnel_info *tinfo);
-int br_process_vlan_tunnel_info(struct net_bridge *br,
-				struct net_bridge_port *p,
+int br_process_vlan_tunnel_info(const struct net_bridge *br,
+				const struct net_bridge_port *p,
 				int cmd,
 				struct vtunnel_info *tinfo_curr,
 				struct vtunnel_info *tinfo_last,
@@ -32,8 +32,9 @@ int br_fill_vlan_tunnel_info(struct sk_buff *skb,
 /* br_vlan_tunnel.c */
 int vlan_tunnel_init(struct net_bridge_vlan_group *vg);
 void vlan_tunnel_deinit(struct net_bridge_vlan_group *vg);
-int nbp_vlan_tunnel_info_delete(struct net_bridge_port *port, u16 vid);
-int nbp_vlan_tunnel_info_add(struct net_bridge_port *port, u16 vid, u32
tun_id);
+int nbp_vlan_tunnel_info_delete(const struct net_bridge_port *port, u16 vid);
+int nbp_vlan_tunnel_info_add(const struct net_bridge_port *port, u16 vid,
+			     u32 tun_id);
 void nbp_vlan_tunnel_info_flush(struct net_bridge_port *port);
 void vlan_tunnel_info_del(struct net_bridge_vlan_group *vg,
 			  struct net_bridge_vlan *vlan);
@@ -48,13 +49,13 @@ static inline int vlan_tunnel_init(struct
net_bridge_vlan_group *vg)
 	return 0;
 }
 
-static inline int nbp_vlan_tunnel_info_delete(struct net_bridge_port *port,
+static inline int nbp_vlan_tunnel_info_delete(const struct net_bridge_port
*port,
 					      u16 vid)
 {
 	return 0;
 }
 
-static inline int nbp_vlan_tunnel_info_add(struct net_bridge_port *port,
+static inline int nbp_vlan_tunnel_info_add(const struct net_bridge_port *port,
 					   u16 vid, u32 tun_id)
 {
 	return 0;
diff --git a/net/bridge/br_vlan_tunnel.c b/net/bridge/br_vlan_tunnel.c
index d13d2080f527..169e005fbda2 100644
--- a/net/bridge/br_vlan_tunnel.c
+++ b/net/bridge/br_vlan_tunnel.c
@@ -89,7 +89,8 @@ static int __vlan_tunnel_info_add(struct net_bridge_vlan_group
*vg,
 /* Must be protected by RTNL.
  * Must be called with vid in range from 1 to 4094 inclusive.
  */
-int nbp_vlan_tunnel_info_add(struct net_bridge_port *port, u16 vid, u32 tun_id)
+int nbp_vlan_tunnel_info_add(const struct net_bridge_port *port, u16 vid,
+			     u32 tun_id)
 {
 	struct net_bridge_vlan_group *vg;
 	struct net_bridge_vlan *vlan;
@@ -107,7 +108,7 @@ int nbp_vlan_tunnel_info_add(struct net_bridge_port *port,
u16 vid, u32 tun_id)
 /* Must be protected by RTNL.
  * Must be called with vid in range from 1 to 4094 inclusive.
  */
-int nbp_vlan_tunnel_info_delete(struct net_bridge_port *port, u16 vid)
+int nbp_vlan_tunnel_info_delete(const struct net_bridge_port *port, u16 vid)
 {
 	struct net_bridge_vlan_group *vg;
 	struct net_bridge_vlan *v;
-- 
2.24.1

Nikolay Aleksandrov

2020-Mar-17 12:08 UTC

head link

[Bridge] [PATCH net-next 3/4] net: bridge: vlan options: add support for tunnel id dumping

Add a new option - BRIDGE_VLANDB_ENTRY_TUNNEL_ID which is used to dump
the tunnel id mapping. Since they're unique per vlan they can enter a
vlan range if they're consecutive, thus we can calculate the tunnel id
range map simply as: vlan range end id - vlan range start id. The
starting point is the tunnel id in BRIDGE_VLANDB_ENTRY_TUNNEL_ID. This
is similar to how the tunnel entries can be created in a range via the
old API (a vlan range maps to a tunnel range).

Signed-off-by: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
---
 include/uapi/linux/if_bridge.h |  1 +
 net/bridge/br_netlink_tunnel.c |  4 ++--
 net/bridge/br_private_tunnel.h |  2 ++
 net/bridge/br_vlan_options.c   | 29 ++++++++++++++++++++++++++---
 4 files changed, 31 insertions(+), 5 deletions(-)

diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h
index 42f7ca38ad80..36760ff69711 100644
--- a/include/uapi/linux/if_bridge.h
+++ b/include/uapi/linux/if_bridge.h
@@ -192,6 +192,7 @@ enum {
 	BRIDGE_VLANDB_ENTRY_INFO,
 	BRIDGE_VLANDB_ENTRY_RANGE,
 	BRIDGE_VLANDB_ENTRY_STATE,
+	BRIDGE_VLANDB_ENTRY_TUNNEL_ID,
 	__BRIDGE_VLANDB_ENTRY_MAX,
 };
 #define BRIDGE_VLANDB_ENTRY_MAX (__BRIDGE_VLANDB_ENTRY_MAX - 1)
diff --git a/net/bridge/br_netlink_tunnel.c b/net/bridge/br_netlink_tunnel.c
index beea08b8c422..996a77620814 100644
--- a/net/bridge/br_netlink_tunnel.c
+++ b/net/bridge/br_netlink_tunnel.c
@@ -26,8 +26,8 @@ static size_t __get_vlan_tinfo_size(void)
 		  nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_VLAN_TUNNEL_FLAGS */
 }
 
-static bool vlan_tunid_inrange(struct net_bridge_vlan *v_curr,
-			       struct net_bridge_vlan *v_last)
+bool vlan_tunid_inrange(const struct net_bridge_vlan *v_curr,
+			const struct net_bridge_vlan *v_last)
 {
 	__be32 tunid_curr = tunnel_id_to_key32(v_curr->tinfo.tunnel_id);
 	__be32 tunid_last = tunnel_id_to_key32(v_last->tinfo.tunnel_id);
diff --git a/net/bridge/br_private_tunnel.h b/net/bridge/br_private_tunnel.h
index a9b818fc8b6c..b27a0c0371f2 100644
--- a/net/bridge/br_private_tunnel.h
+++ b/net/bridge/br_private_tunnel.h
@@ -43,6 +43,8 @@ int br_handle_ingress_vlan_tunnel(struct sk_buff *skb,
 				  struct net_bridge_vlan_group *vg);
 int br_handle_egress_vlan_tunnel(struct sk_buff *skb,
 				 struct net_bridge_vlan *vlan);
+bool vlan_tunid_inrange(const struct net_bridge_vlan *v_curr,
+			const struct net_bridge_vlan *v_last);
 #else
 static inline int vlan_tunnel_init(struct net_bridge_vlan_group *vg)
 {
diff --git a/net/bridge/br_vlan_options.c b/net/bridge/br_vlan_options.c
index 24cf2a621df9..d3618da32b8e 100644
--- a/net/bridge/br_vlan_options.c
+++ b/net/bridge/br_vlan_options.c
@@ -4,25 +4,48 @@
 #include <linux/netdevice.h>
 #include <linux/rtnetlink.h>
 #include <linux/slab.h>
+#include <net/ip_tunnels.h>
 
 #include "br_private.h"
+#include "br_private_tunnel.h"
+
+static bool __vlan_tun_put(struct sk_buff *skb, const struct net_bridge_vlan
*v)
+{
+	__be32 tid = tunnel_id_to_key32(v->tinfo.tunnel_id);
+
+	if (!v->tinfo.tunnel_dst)
+		return true;
+
+	return !nla_put_u32(skb, BRIDGE_VLANDB_ENTRY_TUNNEL_ID,
+			    be32_to_cpu(tid));
+}
+
+static bool __vlan_tun_can_enter_range(const struct net_bridge_vlan *v_curr,
+				       const struct net_bridge_vlan *range_end)
+{
+	return (!v_curr->tinfo.tunnel_dst &&
!range_end->tinfo.tunnel_dst) ||
+	       vlan_tunid_inrange(v_curr, range_end);
+}
 
 /* check if the options' state of v_curr allow it to enter the range */
 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
 			   const struct net_bridge_vlan *range_end)
 {
-	return v_curr->state == range_end->state;
+	return v_curr->state == range_end->state &&
+	       __vlan_tun_can_enter_range(v_curr, range_end);
 }
 
 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v)
 {
 	return !nla_put_u8(skb, BRIDGE_VLANDB_ENTRY_STATE,
-			   br_vlan_get_state(v));
+			   br_vlan_get_state(v)) &&
+	       __vlan_tun_put(skb, v);
 }
 
 size_t br_vlan_opts_nl_size(void)
 {
-	return nla_total_size(sizeof(u8)); /* BRIDGE_VLANDB_ENTRY_STATE */
+	return nla_total_size(sizeof(u8)) /* BRIDGE_VLANDB_ENTRY_STATE */
+	       + nla_total_size(sizeof(u32)); /* BRIDGE_VLANDB_ENTRY_TUNNEL_ID */
 }
 
 static int br_vlan_modify_state(struct net_bridge_vlan_group *vg,
-- 
2.24.1

Nikolay Aleksandrov

2020-Mar-17 12:08 UTC

head link

[Bridge] [PATCH net-next 4/4] net: bridge: vlan options: add support for tunnel mapping set/del

This patch adds support for manipulating vlan/tunnel mappings. The
tunnel ids are globally unique and are one per-vlan. There were two
trickier issues - first in order to support vlan ranges we have to
compute the current tunnel id in the following way:
 - base tunnel id (attr) + current vlan id - starting vlan id
This is in line how the old API does vlan/tunnel mapping with ranges. We
already have the vlan range present, so it's redundant to add another
attribute for the tunnel range end. It's simply base tunnel id + vlan
range. And second to support removing mappings we need an out-of-band way
to tell the option manipulating function because there are no
special/reserved tunnel id values, so we use a vlan flag to denote the
operation is tunnel mapping removal.

Signed-off-by: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
---
 include/uapi/linux/if_bridge.h |  1 +
 net/bridge/br_netlink_tunnel.c |  4 ++--
 net/bridge/br_private_tunnel.h |  2 ++
 net/bridge/br_vlan.c           |  1 +
 net/bridge/br_vlan_options.c   | 39 ++++++++++++++++++++++++++++++++++
 5 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h
index 36760ff69711..54010b49c093 100644
--- a/include/uapi/linux/if_bridge.h
+++ b/include/uapi/linux/if_bridge.h
@@ -131,6 +131,7 @@ enum {
 #define BRIDGE_VLAN_INFO_RANGE_END	(1<<4) /* VLAN is end of vlan range */
 #define BRIDGE_VLAN_INFO_BRENTRY	(1<<5) /* Global bridge VLAN entry */
 #define BRIDGE_VLAN_INFO_ONLY_OPTS	(1<<6) /* Skip create/delete/flags */
+#define BRIDGE_VLAN_INFO_REMOVE_TUN	(1<<7) /* Remove tunnel mapping */
 
 struct bridge_vlan_info {
 	__u16 flags;
diff --git a/net/bridge/br_netlink_tunnel.c b/net/bridge/br_netlink_tunnel.c
index 996a77620814..162998e2f039 100644
--- a/net/bridge/br_netlink_tunnel.c
+++ b/net/bridge/br_netlink_tunnel.c
@@ -193,8 +193,8 @@ static const struct nla_policy
vlan_tunnel_policy[IFLA_BRIDGE_VLAN_TUNNEL_MAX +
 	[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS] = { .type = NLA_U16 },
 };
 
-static int br_vlan_tunnel_info(const struct net_bridge_port *p, int cmd,
-			       u16 vid, u32 tun_id, bool *changed)
+int br_vlan_tunnel_info(const struct net_bridge_port *p, int cmd,
+			u16 vid, u32 tun_id, bool *changed)
 {
 	int err = 0;
 
diff --git a/net/bridge/br_private_tunnel.h b/net/bridge/br_private_tunnel.h
index b27a0c0371f2..c54cc26211d7 100644
--- a/net/bridge/br_private_tunnel.h
+++ b/net/bridge/br_private_tunnel.h
@@ -45,6 +45,8 @@ int br_handle_egress_vlan_tunnel(struct sk_buff *skb,
 				 struct net_bridge_vlan *vlan);
 bool vlan_tunid_inrange(const struct net_bridge_vlan *v_curr,
 			const struct net_bridge_vlan *v_last);
+int br_vlan_tunnel_info(const struct net_bridge_port *p, int cmd,
+			u16 vid, u32 tun_id, bool *changed);
 #else
 static inline int vlan_tunnel_init(struct net_bridge_vlan_group *vg)
 {
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 09bfda47fbbf..24f524536be4 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -1839,6 +1839,7 @@ static const struct nla_policy
br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1]  					    .len = sizeof(struct
bridge_vlan_info) },
 	[BRIDGE_VLANDB_ENTRY_RANGE]	= { .type = NLA_U16 },
 	[BRIDGE_VLANDB_ENTRY_STATE]	= { .type = NLA_U8 },
+	[BRIDGE_VLANDB_ENTRY_TUNNEL_ID] = { .type = NLA_U32 },
 };
 
 static int br_vlan_rtm_process_one(struct net_device *dev,
diff --git a/net/bridge/br_vlan_options.c b/net/bridge/br_vlan_options.c
index d3618da32b8e..138e180cf4d8 100644
--- a/net/bridge/br_vlan_options.c
+++ b/net/bridge/br_vlan_options.c
@@ -85,6 +85,40 @@ static int br_vlan_modify_state(struct net_bridge_vlan_group
*vg,
 	return 0;
 }
 
+static int br_vlan_modify_tunnel(const struct net_bridge_port *p,
+				 struct net_bridge_vlan *v,
+				 struct nlattr **tb,
+				 bool *changed,
+				 struct netlink_ext_ack *extack)
+{
+	struct bridge_vlan_info *vinfo;
+	int cmdmap;
+	u32 tun_id;
+
+	if (!p) {
+		NL_SET_ERR_MSG_MOD(extack, "Can't modify tunnel mapping of non-port
vlans");
+		return -EINVAL;
+	}
+	if (!(p->flags & BR_VLAN_TUNNEL)) {
+		NL_SET_ERR_MSG_MOD(extack, "Port doesn't have tunnel flag
set");
+		return -EINVAL;
+	}
+
+	/* vlan info attribute is guaranteed by br_vlan_rtm_process_one */
+	vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]);
+	cmdmap = vinfo->flags & BRIDGE_VLAN_INFO_REMOVE_TUN ? RTM_DELLINK :
+							      RTM_SETLINK;
+	/* when working on vlan ranges this represents the starting tunnel id */
+	tun_id = nla_get_u32(tb[BRIDGE_VLANDB_ENTRY_TUNNEL_ID]);
+	/* tunnel ids are mapped to each vlan in increasing order,
+	 * the starting vlan is in BRIDGE_VLANDB_ENTRY_INFO and v is the
+	 * current vlan, so we compute: tun_id + v - vinfo->vid
+	 */
+	tun_id += v->vid - vinfo->vid;
+
+	return br_vlan_tunnel_info(p, cmdmap, v->vid, tun_id, changed);
+}
+
 static int br_vlan_process_one_opts(const struct net_bridge *br,
 				    const struct net_bridge_port *p,
 				    struct net_bridge_vlan_group *vg,
@@ -103,6 +137,11 @@ static int br_vlan_process_one_opts(const struct net_bridge
*br,
 		if (err)
 			return err;
 	}
+	if (tb[BRIDGE_VLANDB_ENTRY_TUNNEL_ID]) {
+		err = br_vlan_modify_tunnel(p, v, tb, changed, extack);
+		if (err)
+			return err;
+	}
 
 	return 0;
 }
-- 
2.24.1

David Miller

2020-Mar-18 05:47 UTC

head link

[Bridge] [PATCH net-next 0/4] net: bridge: vlan options: add support for tunnel mapping

From: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
Date: Tue, 17 Mar 2020 14:08:32 +0200
> In order to bring the new vlan API on par with the old one and be able
> to completely migrate to the new one we need to support vlan tunnel mapping
> and statistics. This patch-set takes care of the former by making it a
> vlan option. There are two notable issues to deal with:
>  - vlan range to tunnel range mapping
>    * The tunnel ids are globally unique for the vlan code and a vlan can
>      be mapped to one tunnel, so the old API took care of ranges by
>      taking the starting tunnel id value and incrementally mapping
>      vlan id(i) -> tunnel id(i). This set takes the same approach and
>      uses one new attribute - BRIDGE_VLANDB_ENTRY_TUNNEL_ID. If used
>      with a vlan range then it's the starting tunnel id to map.
> 
>  - tunnel mapping removal
>    * Since there are no reserved/special tunnel ids defined, we can't
>      encode mapping removal within the new attribute, in order to be
>      able to remove a mapping we add a vlan flag which makes the new
>      tunnel option remove the mapping
> 
> The rest is pretty straight-forward, in fact we directly re-use the old
> code for manipulating tunnels by just mapping the command (set/del). In
> order to be able to keep detecting vlan ranges we check that the current
> vlan has a tunnel and it's extending the current vlan range end's
tunnel
> id.
Looks good, series applied, thank you.

Linux Ethernet Bridging - Mar 2020 - [Bridge] [PATCH net-next 0/4] net: bridge: vlan options: add support for tunnel mapping

[Bridge] [PATCH net-next 0/4] net: bridge: vlan options: add support for tunnel mapping

[Bridge] [PATCH net-next 1/4] net: bridge: vlan options: rename br_vlan_opts_eq to br_vlan_opts_eq_range

[Bridge] [PATCH net-next 2/4] net: bridge: vlan tunnel: constify bridge and port arguments

[Bridge] [PATCH net-next 3/4] net: bridge: vlan options: add support for tunnel id dumping

[Bridge] [PATCH net-next 4/4] net: bridge: vlan options: add support for tunnel mapping set/del

[Bridge] [PATCH net-next 0/4] net: bridge: vlan options: add support for tunnel mapping