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authorDavid S. Miller <davem@davemloft.net>2016-09-08 17:10:28 -0700
committerDavid S. Miller <davem@davemloft.net>2016-09-08 17:10:28 -0700
commit3b61075be0929569e4de8b905ae6628d3285442f (patch)
treeccedb1acda9922d975903894776dcfb853fc3c2d
parentd545caca827b65aab557a9e9dcdcf1e5a3823c2d (diff)
parent018c1dda5ff1e7bd1fe2d9fd1d0f5b82dc6fc0cd (diff)
Merge branch 'ovs-802.1ad'
Eric Garver says: ==================== openvswitch: add 802.1ad support This series adds 802.1ad support to openvswitch. It is a continuation of the work originally started by Thomas F Herbert - hence the large rev number. The extra VLAN is implemented by using an additional level of the OVS_KEY_ATTR_ENCAP netlink attribute. In OVS flow speak, this looks like eth_type(0x88a8),vlan(vid=100),encap(eth_type(0x8100), vlan(vid=200), encap(eth_type(0x0800), ...)) The userspace counterpart has also seen recent activity on the ovs-dev mailing lists. There are some new 802.1ad OVS tests being added - also on the ovs-dev list. This patch series has been tested using the most recent version of userspace (v3) and tests (v2). v22 changes: - merge patch 4 into patch 3 - fix checkpatch.pl errors - Still some 80 char warnings for long string literals - refresh pointer after pskb_may_pull() - refactor vlan nlattr parsing to remove some double checks - introduce ovs_nla_put_vlan() - move triple VLAN check to after ethertype serialization - WARN_ON_ONCE() on triple VLAN and unexpected encap values v21 changes: - Fix (and simplify) netlink attribute parsing - re-add handling of truncated VLAN tags - fix if/else dangling assignment in {push,pop}_vlan() - simplify parse_vlan() ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/if_vlan.h33
-rw-r--r--include/uapi/linux/openvswitch.h17
-rw-r--r--net/openvswitch/actions.c16
-rw-r--r--net/openvswitch/flow.c65
-rw-r--r--net/openvswitch/flow.h8
-rw-r--r--net/openvswitch/flow_netlink.c310
-rw-r--r--net/openvswitch/vport.c7
7 files changed, 314 insertions, 142 deletions
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 49d4aef1f789..3319d97d789d 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -272,6 +272,23 @@ static inline int vlan_get_encap_level(struct net_device *dev)
}
#endif
+/**
+ * eth_type_vlan - check for valid vlan ether type.
+ * @ethertype: ether type to check
+ *
+ * Returns true if the ether type is a vlan ether type.
+ */
+static inline bool eth_type_vlan(__be16 ethertype)
+{
+ switch (ethertype) {
+ case htons(ETH_P_8021Q):
+ case htons(ETH_P_8021AD):
+ return true;
+ default:
+ return false;
+ }
+}
+
static inline bool vlan_hw_offload_capable(netdev_features_t features,
__be16 proto)
{
@@ -425,8 +442,7 @@ static inline int __vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci)
{
struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb->data;
- if (veth->h_vlan_proto != htons(ETH_P_8021Q) &&
- veth->h_vlan_proto != htons(ETH_P_8021AD))
+ if (!eth_type_vlan(veth->h_vlan_proto))
return -EINVAL;
*vlan_tci = ntohs(veth->h_vlan_TCI);
@@ -488,7 +504,7 @@ static inline __be16 __vlan_get_protocol(struct sk_buff *skb, __be16 type,
* present at mac_len - VLAN_HLEN (if mac_len > 0), or at
* ETH_HLEN otherwise
*/
- if (type == htons(ETH_P_8021Q) || type == htons(ETH_P_8021AD)) {
+ if (eth_type_vlan(type)) {
if (vlan_depth) {
if (WARN_ON(vlan_depth < VLAN_HLEN))
return 0;
@@ -506,8 +522,7 @@ static inline __be16 __vlan_get_protocol(struct sk_buff *skb, __be16 type,
vh = (struct vlan_hdr *)(skb->data + vlan_depth);
type = vh->h_vlan_encapsulated_proto;
vlan_depth += VLAN_HLEN;
- } while (type == htons(ETH_P_8021Q) ||
- type == htons(ETH_P_8021AD));
+ } while (eth_type_vlan(type));
}
if (depth)
@@ -572,8 +587,7 @@ static inline void vlan_set_encap_proto(struct sk_buff *skb,
static inline bool skb_vlan_tagged(const struct sk_buff *skb)
{
if (!skb_vlan_tag_present(skb) &&
- likely(skb->protocol != htons(ETH_P_8021Q) &&
- skb->protocol != htons(ETH_P_8021AD)))
+ likely(!eth_type_vlan(skb->protocol)))
return false;
return true;
@@ -593,15 +607,14 @@ static inline bool skb_vlan_tagged_multi(const struct sk_buff *skb)
if (!skb_vlan_tag_present(skb)) {
struct vlan_ethhdr *veh;
- if (likely(protocol != htons(ETH_P_8021Q) &&
- protocol != htons(ETH_P_8021AD)))
+ if (likely(!eth_type_vlan(protocol)))
return false;
veh = (struct vlan_ethhdr *)skb->data;
protocol = veh->h_vlan_encapsulated_proto;
}
- if (protocol != htons(ETH_P_8021Q) && protocol != htons(ETH_P_8021AD))
+ if (!eth_type_vlan(protocol))
return false;
return true;
diff --git a/include/uapi/linux/openvswitch.h b/include/uapi/linux/openvswitch.h
index 54c3b4f4aceb..59ed3992c760 100644
--- a/include/uapi/linux/openvswitch.h
+++ b/include/uapi/linux/openvswitch.h
@@ -605,13 +605,13 @@ struct ovs_action_push_mpls {
* @vlan_tci: Tag control identifier (TCI) to push. The CFI bit must be set
* (but it will not be set in the 802.1Q header that is pushed).
*
- * The @vlan_tpid value is typically %ETH_P_8021Q. The only acceptable TPID
- * values are those that the kernel module also parses as 802.1Q headers, to
- * prevent %OVS_ACTION_ATTR_PUSH_VLAN followed by %OVS_ACTION_ATTR_POP_VLAN
- * from having surprising results.
+ * The @vlan_tpid value is typically %ETH_P_8021Q or %ETH_P_8021AD.
+ * The only acceptable TPID values are those that the kernel module also parses
+ * as 802.1Q or 802.1AD headers, to prevent %OVS_ACTION_ATTR_PUSH_VLAN followed
+ * by %OVS_ACTION_ATTR_POP_VLAN from having surprising results.
*/
struct ovs_action_push_vlan {
- __be16 vlan_tpid; /* 802.1Q TPID. */
+ __be16 vlan_tpid; /* 802.1Q or 802.1ad TPID. */
__be16 vlan_tci; /* 802.1Q TCI (VLAN ID and priority). */
};
@@ -721,9 +721,10 @@ enum ovs_nat_attr {
* is copied from the value to the packet header field, rest of the bits are
* left unchanged. The non-masked value bits must be passed in as zeroes.
* Masking is not supported for the %OVS_KEY_ATTR_TUNNEL attribute.
- * @OVS_ACTION_ATTR_PUSH_VLAN: Push a new outermost 802.1Q header onto the
- * packet.
- * @OVS_ACTION_ATTR_POP_VLAN: Pop the outermost 802.1Q header off the packet.
+ * @OVS_ACTION_ATTR_PUSH_VLAN: Push a new outermost 802.1Q or 802.1ad header
+ * onto the packet.
+ * @OVS_ACTION_ATTR_POP_VLAN: Pop the outermost 802.1Q or 802.1ad header
+ * from the packet.
* @OVS_ACTION_ATTR_SAMPLE: Probabilitically executes actions, as specified in
* the nested %OVS_SAMPLE_ATTR_* attributes.
* @OVS_ACTION_ATTR_PUSH_MPLS: Push a new MPLS label stack entry onto the
diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
index ca91fc33f8a9..4fe9032b1160 100644
--- a/net/openvswitch/actions.c
+++ b/net/openvswitch/actions.c
@@ -246,20 +246,24 @@ static int pop_vlan(struct sk_buff *skb, struct sw_flow_key *key)
int err;
err = skb_vlan_pop(skb);
- if (skb_vlan_tag_present(skb))
+ if (skb_vlan_tag_present(skb)) {
invalidate_flow_key(key);
- else
- key->eth.tci = 0;
+ } else {
+ key->eth.vlan.tci = 0;
+ key->eth.vlan.tpid = 0;
+ }
return err;
}
static int push_vlan(struct sk_buff *skb, struct sw_flow_key *key,
const struct ovs_action_push_vlan *vlan)
{
- if (skb_vlan_tag_present(skb))
+ if (skb_vlan_tag_present(skb)) {
invalidate_flow_key(key);
- else
- key->eth.tci = vlan->vlan_tci;
+ } else {
+ key->eth.vlan.tci = vlan->vlan_tci;
+ key->eth.vlan.tpid = vlan->vlan_tpid;
+ }
return skb_vlan_push(skb, vlan->vlan_tpid,
ntohs(vlan->vlan_tci) & ~VLAN_TAG_PRESENT);
}
diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index 0ea128eeeab2..1240ae3b88d2 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -302,24 +302,57 @@ static bool icmp6hdr_ok(struct sk_buff *skb)
sizeof(struct icmp6hdr));
}
-static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
+/**
+ * Parse vlan tag from vlan header.
+ * Returns ERROR on memory error.
+ * Returns 0 if it encounters a non-vlan or incomplete packet.
+ * Returns 1 after successfully parsing vlan tag.
+ */
+static int parse_vlan_tag(struct sk_buff *skb, struct vlan_head *key_vh)
{
- struct qtag_prefix {
- __be16 eth_type; /* ETH_P_8021Q */
- __be16 tci;
- };
- struct qtag_prefix *qp;
+ struct vlan_head *vh = (struct vlan_head *)skb->data;
- if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16)))
+ if (likely(!eth_type_vlan(vh->tpid)))
return 0;
- if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) +
- sizeof(__be16))))
+ if (unlikely(skb->len < sizeof(struct vlan_head) + sizeof(__be16)))
+ return 0;
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(struct vlan_head) +
+ sizeof(__be16))))
return -ENOMEM;
- qp = (struct qtag_prefix *) skb->data;
- key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT);
- __skb_pull(skb, sizeof(struct qtag_prefix));
+ vh = (struct vlan_head *)skb->data;
+ key_vh->tci = vh->tci | htons(VLAN_TAG_PRESENT);
+ key_vh->tpid = vh->tpid;
+
+ __skb_pull(skb, sizeof(struct vlan_head));
+ return 1;
+}
+
+static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
+{
+ int res;
+
+ key->eth.vlan.tci = 0;
+ key->eth.vlan.tpid = 0;
+ key->eth.cvlan.tci = 0;
+ key->eth.cvlan.tpid = 0;
+
+ if (likely(skb_vlan_tag_present(skb))) {
+ key->eth.vlan.tci = htons(skb->vlan_tci);
+ key->eth.vlan.tpid = skb->vlan_proto;
+ } else {
+ /* Parse outer vlan tag in the non-accelerated case. */
+ res = parse_vlan_tag(skb, &key->eth.vlan);
+ if (res <= 0)
+ return res;
+ }
+
+ /* Parse inner vlan tag. */
+ res = parse_vlan_tag(skb, &key->eth.cvlan);
+ if (res <= 0)
+ return res;
return 0;
}
@@ -480,12 +513,8 @@ static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
* update skb->csum here.
*/
- key->eth.tci = 0;
- if (skb_vlan_tag_present(skb))
- key->eth.tci = htons(skb->vlan_tci);
- else if (eth->h_proto == htons(ETH_P_8021Q))
- if (unlikely(parse_vlan(skb, key)))
- return -ENOMEM;
+ if (unlikely(parse_vlan(skb, key)))
+ return -ENOMEM;
key->eth.type = parse_ethertype(skb);
if (unlikely(key->eth.type == htons(0)))
diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h
index 03378e75a67c..156a3029c17b 100644
--- a/net/openvswitch/flow.h
+++ b/net/openvswitch/flow.h
@@ -50,6 +50,11 @@ struct ovs_tunnel_info {
struct metadata_dst *tun_dst;
};
+struct vlan_head {
+ __be16 tpid; /* Vlan type. Generally 802.1q or 802.1ad.*/
+ __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */
+};
+
#define OVS_SW_FLOW_KEY_METADATA_SIZE \
(offsetof(struct sw_flow_key, recirc_id) + \
FIELD_SIZEOF(struct sw_flow_key, recirc_id))
@@ -69,7 +74,8 @@ struct sw_flow_key {
struct {
u8 src[ETH_ALEN]; /* Ethernet source address. */
u8 dst[ETH_ALEN]; /* Ethernet destination address. */
- __be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */
+ struct vlan_head vlan;
+ struct vlan_head cvlan;
__be16 type; /* Ethernet frame type. */
} eth;
union {
diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index c78a6a1476fb..8efa718ddb5e 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -808,6 +808,167 @@ int ovs_nla_put_tunnel_info(struct sk_buff *skb,
ip_tunnel_info_af(tun_info));
}
+static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
+ const struct nlattr *a[],
+ bool is_mask, bool inner)
+{
+ __be16 tci = 0;
+ __be16 tpid = 0;
+
+ if (a[OVS_KEY_ATTR_VLAN])
+ tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
+
+ if (a[OVS_KEY_ATTR_ETHERTYPE])
+ tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
+
+ if (likely(!inner)) {
+ SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask);
+ SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
+ } else {
+ SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask);
+ SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask);
+ }
+ return 0;
+}
+
+static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
+ u64 key_attrs, bool inner,
+ const struct nlattr **a, bool log)
+{
+ __be16 tci = 0;
+
+ if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
+ (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
+ eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) {
+ /* Not a VLAN. */
+ return 0;
+ }
+
+ if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
+ (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
+ OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN");
+ return -EINVAL;
+ }
+
+ if (a[OVS_KEY_ATTR_VLAN])
+ tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
+
+ if (!(tci & htons(VLAN_TAG_PRESENT))) {
+ if (tci) {
+ OVS_NLERR(log, "%s TCI does not have VLAN_TAG_PRESENT bit set.",
+ (inner) ? "C-VLAN" : "VLAN");
+ return -EINVAL;
+ } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
+ /* Corner case for truncated VLAN header. */
+ OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.",
+ (inner) ? "C-VLAN" : "VLAN");
+ return -EINVAL;
+ }
+ }
+
+ return 1;
+}
+
+static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
+ u64 key_attrs, bool inner,
+ const struct nlattr **a, bool log)
+{
+ __be16 tci = 0;
+ __be16 tpid = 0;
+ bool encap_valid = !!(match->key->eth.vlan.tci &
+ htons(VLAN_TAG_PRESENT));
+ bool i_encap_valid = !!(match->key->eth.cvlan.tci &
+ htons(VLAN_TAG_PRESENT));
+
+ if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
+ /* Not a VLAN. */
+ return 0;
+ }
+
+ if ((!inner && !encap_valid) || (inner && !i_encap_valid)) {
+ OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.",
+ (inner) ? "C-VLAN" : "VLAN");
+ return -EINVAL;
+ }
+
+ if (a[OVS_KEY_ATTR_VLAN])
+ tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
+
+ if (a[OVS_KEY_ATTR_ETHERTYPE])
+ tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
+
+ if (tpid != htons(0xffff)) {
+ OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).",
+ (inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
+ return -EINVAL;
+ }
+ if (!(tci & htons(VLAN_TAG_PRESENT))) {
+ OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_TAG_PRESENT bit.",
+ (inner) ? "C-VLAN" : "VLAN");
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+static int __parse_vlan_from_nlattrs(struct sw_flow_match *match,
+ u64 *key_attrs, bool inner,
+ const struct nlattr **a, bool is_mask,
+ bool log)
+{
+ int err;
+ const struct nlattr *encap;
+
+ if (!is_mask)
+ err = validate_vlan_from_nlattrs(match, *key_attrs, inner,
+ a, log);
+ else
+ err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner,
+ a, log);
+ if (err <= 0)
+ return err;
+
+ err = encode_vlan_from_nlattrs(match, a, is_mask, inner);
+ if (err)
+ return err;
+
+ *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
+ *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
+ *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
+
+ encap = a[OVS_KEY_ATTR_ENCAP];
+
+ if (!is_mask)
+ err = parse_flow_nlattrs(encap, a, key_attrs, log);
+ else
+ err = parse_flow_mask_nlattrs(encap, a, key_attrs, log);
+
+ return err;
+}
+
+static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
+ u64 *key_attrs, const struct nlattr **a,
+ bool is_mask, bool log)
+{
+ int err;
+ bool encap_valid = false;
+
+ err = __parse_vlan_from_nlattrs(match, key_attrs, false, a,
+ is_mask, log);
+ if (err)
+ return err;
+
+ encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_TAG_PRESENT));
+ if (encap_valid) {
+ err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
+ is_mask, log);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
u64 *attrs, const struct nlattr **a,
bool is_mask, bool log)
@@ -923,20 +1084,11 @@ static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
}
if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
- __be16 tci;
-
- tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
- if (!(tci & htons(VLAN_TAG_PRESENT))) {
- if (is_mask)
- OVS_NLERR(log, "VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.");
- else
- OVS_NLERR(log, "VLAN TCI does not have VLAN_TAG_PRESENT bit set.");
-
- return -EINVAL;
- }
-
- SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
- attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
+ /* VLAN attribute is always parsed before getting here since it
+ * may occur multiple times.
+ */
+ OVS_NLERR(log, "VLAN attribute unexpected.");
+ return -EINVAL;
}
if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
@@ -1182,49 +1334,18 @@ int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
bool log)
{
const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
- const struct nlattr *encap;
struct nlattr *newmask = NULL;
u64 key_attrs = 0;
u64 mask_attrs = 0;
- bool encap_valid = false;
int err;
err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
if (err)
return err;
- if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
- (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
- (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) {
- __be16 tci;
-
- if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
- (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
- OVS_NLERR(log, "Invalid Vlan frame.");
- return -EINVAL;
- }
-
- key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
- tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
- encap = a[OVS_KEY_ATTR_ENCAP];
- key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
- encap_valid = true;
-
- if (tci & htons(VLAN_TAG_PRESENT)) {
- err = parse_flow_nlattrs(encap, a, &key_attrs, log);
- if (err)
- return err;
- } else if (!tci) {
- /* Corner case for truncated 802.1Q header. */
- if (nla_len(encap)) {
- OVS_NLERR(log, "Truncated 802.1Q header has non-zero encap attribute.");
- return -EINVAL;
- }
- } else {
- OVS_NLERR(log, "Encap attr is set for non-VLAN frame");
- return -EINVAL;
- }
- }
+ err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
+ if (err)
+ return err;
err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
if (err)
@@ -1265,46 +1386,12 @@ int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
goto free_newmask;
/* Always match on tci. */
- SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
-
- if (mask_attrs & 1 << OVS_KEY_ATTR_ENCAP) {
- __be16 eth_type = 0;
- __be16 tci = 0;
-
- if (!encap_valid) {
- OVS_NLERR(log, "Encap mask attribute is set for non-VLAN frame.");
- err = -EINVAL;
- goto free_newmask;
- }
-
- mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
- if (a[OVS_KEY_ATTR_ETHERTYPE])
- eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
-
- if (eth_type == htons(0xffff)) {
- mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
- encap = a[OVS_KEY_ATTR_ENCAP];
- err = parse_flow_mask_nlattrs(encap, a,
- &mask_attrs, log);
- if (err)
- goto free_newmask;
- } else {
- OVS_NLERR(log, "VLAN frames must have an exact match on the TPID (mask=%x).",
- ntohs(eth_type));
- err = -EINVAL;
- goto free_newmask;
- }
-
- if (a[OVS_KEY_ATTR_VLAN])
- tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
+ SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
+ SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
- if (!(tci & htons(VLAN_TAG_PRESENT))) {
- OVS_NLERR(log, "VLAN tag present bit must have an exact match (tci_mask=%x).",
- ntohs(tci));
- err = -EINVAL;
- goto free_newmask;
- }
- }
+ err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
+ if (err)
+ goto free_newmask;
err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
log);
@@ -1410,12 +1497,25 @@ int ovs_nla_get_flow_metadata(struct net *net, const struct nlattr *attr,
return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
}
+static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
+ bool is_mask)
+{
+ __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
+
+ if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
+ nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
+ return -EMSGSIZE;
+ return 0;
+}
+
static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
const struct sw_flow_key *output, bool is_mask,
struct sk_buff *skb)
{
struct ovs_key_ethernet *eth_key;
- struct nlattr *nla, *encap;
+ struct nlattr *nla;
+ struct nlattr *encap = NULL;
+ struct nlattr *in_encap = NULL;
if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
goto nla_put_failure;
@@ -1464,17 +1564,21 @@ static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
ether_addr_copy(eth_key->eth_src, output->eth.src);
ether_addr_copy(eth_key->eth_dst, output->eth.dst);
- if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
- __be16 eth_type;
- eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff);
- if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
- nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
+ if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
+ if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
goto nla_put_failure;
encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
- if (!swkey->eth.tci)
+ if (!swkey->eth.vlan.tci)
goto unencap;
- } else
- encap = NULL;
+
+ if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
+ if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
+ goto nla_put_failure;
+ in_encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
+ if (!swkey->eth.cvlan.tci)
+ goto unencap;
+ }
+ }
if (swkey->eth.type == htons(ETH_P_802_2)) {
/*
@@ -1493,6 +1597,14 @@ static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
goto nla_put_failure;
+ if (eth_type_vlan(swkey->eth.type)) {
+ /* There are 3 VLAN tags, we don't know anything about the rest
+ * of the packet, so truncate here.
+ */
+ WARN_ON_ONCE(!(encap && in_encap));
+ goto unencap;
+ }
+
if (swkey->eth.type == htons(ETH_P_IP)) {
struct ovs_key_ipv4 *ipv4_key;
@@ -1619,6 +1731,8 @@ static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
}
unencap:
+ if (in_encap)
+ nla_nest_end(skb, in_encap);
if (encap)
nla_nest_end(skb, encap);
@@ -2283,7 +2397,7 @@ static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
case OVS_ACTION_ATTR_PUSH_VLAN:
vlan = nla_data(a);
- if (vlan->vlan_tpid != htons(ETH_P_8021Q))
+ if (!eth_type_vlan(vlan->vlan_tpid))
return -EINVAL;
if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
return -EINVAL;
@@ -2388,7 +2502,7 @@ int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
(*sfa)->orig_len = nla_len(attr);
err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type,
- key->eth.tci, log);
+ key->eth.vlan.tci, log);
if (err)
ovs_nla_free_flow_actions(*sfa);
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index 6b21fd068d87..8f198437c724 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -485,9 +485,14 @@ static unsigned int packet_length(const struct sk_buff *skb)
{
unsigned int length = skb->len - ETH_HLEN;
- if (skb->protocol == htons(ETH_P_8021Q))
+ if (skb_vlan_tagged(skb))
length -= VLAN_HLEN;
+ /* Don't subtract for multiple VLAN tags. Most (all?) drivers allow
+ * (ETH_LEN + VLAN_HLEN) in addition to the mtu value, but almost none
+ * account for 802.1ad. e.g. is_skb_forwardable().
+ */
+
return length;
}