Signed-off-by: Joe Stringer <[email protected]>
---
datapath/flow_netlink.c | 219 +++++++++++++++++++----------------------------
1 file changed, 86 insertions(+), 133 deletions(-)
diff --git a/datapath/flow_netlink.c b/datapath/flow_netlink.c
index 69d1919..aa2cece 100644
--- a/datapath/flow_netlink.c
+++ b/datapath/flow_netlink.c
@@ -287,161 +287,121 @@ size_t ovs_key_attr_size(void)
}
/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
-static const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
- [OVS_KEY_ATTR_ENCAP] = -1,
- [OVS_KEY_ATTR_PRIORITY] = sizeof(u32),
- [OVS_KEY_ATTR_IN_PORT] = sizeof(u32),
- [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32),
- [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet),
- [OVS_KEY_ATTR_VLAN] = sizeof(__be16),
- [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16),
- [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4),
- [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6),
- [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp),
- [OVS_KEY_ATTR_TCP_FLAGS] = sizeof(__be16),
- [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp),
- [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp),
- [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp),
- [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6),
- [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp),
- [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd),
- [OVS_KEY_ATTR_DP_HASH] = sizeof(u32),
- [OVS_KEY_ATTR_RECIRC_ID] = sizeof(u32),
- [OVS_KEY_ATTR_TUNNEL] = -1,
- [OVS_KEY_ATTR_MPLS] = sizeof(struct ovs_key_mpls),
+static const struct nla_policy ovs_key_policy[OVS_KEY_ATTR_MAX + 1] = {
+ [OVS_KEY_ATTR_ENCAP] = { .type = NLA_NESTED },
+ [OVS_KEY_ATTR_PRIORITY] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_IN_PORT] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_SKB_MARK] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_ETHERNET] = { .len = sizeof(struct ovs_key_ethernet) },
+ [OVS_KEY_ATTR_VLAN] = { .len = sizeof(__be16) },
+ [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
+ [OVS_KEY_ATTR_IPV4] = { .len = sizeof(struct ovs_key_ipv4) },
+ [OVS_KEY_ATTR_IPV6] = { .len = sizeof(struct ovs_key_ipv6) },
+ [OVS_KEY_ATTR_TCP] = { .len = sizeof(struct ovs_key_tcp) },
+ [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
+ [OVS_KEY_ATTR_UDP] = { .len = sizeof(struct ovs_key_udp) },
+ [OVS_KEY_ATTR_SCTP] = { .len = sizeof(struct ovs_key_sctp) },
+ [OVS_KEY_ATTR_ICMP] = { .len = sizeof(struct ovs_key_icmp) },
+ [OVS_KEY_ATTR_ICMPV6] = { .len = sizeof(struct ovs_key_icmpv6) },
+ [OVS_KEY_ATTR_ARP] = { .len = sizeof(struct ovs_key_arp) },
+ [OVS_KEY_ATTR_ND] = { .len = sizeof(struct ovs_key_nd) },
+ [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
+ [OVS_KEY_ATTR_TUNNEL] = { .type = NLA_NESTED },
+ [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) },
};
-static bool is_all_zero(const u8 *fp, size_t size)
+static int parse_nlattrs(const struct nlattr *attr,
+ const struct nlattr *a[], int maxtype,
+ const struct nla_policy *policy,
+ u64 *attrsp, bool dup, bool nz)
{
- int i;
-
- if (!fp)
- return false;
-
- for (i = 0; i < size; i++)
- if (fp[i])
- return false;
-
- return true;
-}
-
-static int __parse_flow_nlattrs(const struct nlattr *attr,
- const struct nlattr *a[],
- u64 *attrsp, bool nz)
-{
- const struct nlattr *nla;
- u64 attrs;
- int rem;
-
- attrs = *attrsp;
- nla_for_each_nested(nla, attr, rem) {
- u16 type = nla_type(nla);
- int expected_len;
-
- if (type > OVS_KEY_ATTR_MAX) {
- OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n",
- type, OVS_KEY_ATTR_MAX);
- return -EINVAL;
- }
-
- if (attrs & (1ULL << type)) {
- OVS_NLERR("Duplicate key attribute (type %d).\n", type);
- return -EINVAL;
- }
-
- expected_len = ovs_key_lens[type];
- if (nla_len(nla) != expected_len && expected_len != -1) {
- OVS_NLERR("Key attribute has unexpected length (type=%d"
- ", length=%d, expected=%d).\n", type,
- nla_len(nla), expected_len);
- return -EINVAL;
- }
+ u64 attrs = 0;
+ int i, err;
- if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
- attrs |= 1ULL << type;
- a[type] = nla;
- }
- }
- if (rem) {
- OVS_NLERR("Message has %d unknown bytes.\n", rem);
- return -EINVAL;
- }
+ err = nla_parse_strict(a, maxtype, nla_data(attr), nla_len(attr),
+ policy, dup, nz);
+ if (err)
+ return err;
+ for (i = 0; i < maxtype; i++)
+ if (a[i])
+ attrs |= (1ULL << i);
*attrsp = attrs;
+
return 0;
}
static int parse_flow_mask_nlattrs(const struct nlattr *attr,
const struct nlattr *a[], u64 *attrsp)
{
- return __parse_flow_nlattrs(attr, a, attrsp, true);
+ return parse_nlattrs(attr, a, OVS_KEY_ATTR_MAX, ovs_key_policy,
+ attrsp, false, true);
}
static int parse_flow_nlattrs(const struct nlattr *attr,
const struct nlattr *a[], u64 *attrsp)
{
- return __parse_flow_nlattrs(attr, a, attrsp, false);
+ return parse_nlattrs(attr, a, OVS_KEY_ATTR_MAX, ovs_key_policy,
+ attrsp, false, false);
}
static int ipv4_tun_from_nlattr(const struct nlattr *attr,
struct sw_flow_match *match, bool is_mask)
{
- struct nlattr *a;
- int rem;
+ static const struct nla_policy
ovs_tunnel_key_policy[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
+ [OVS_TUNNEL_KEY_ATTR_ID] = { .len = sizeof(u64) },
+ [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = { .len = sizeof(u32) },
+ [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = { .len = sizeof(u32) },
+ [OVS_TUNNEL_KEY_ATTR_TOS] = { .len = 1 },
+ [OVS_TUNNEL_KEY_ATTR_TTL] = { .len = 1 },
+ [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
+ [OVS_TUNNEL_KEY_ATTR_CSUM] = { .len = 0 },
+ [OVS_TUNNEL_KEY_ATTR_TP_SRC] = { .len = sizeof(u16) },
+ [OVS_TUNNEL_KEY_ATTR_TP_DST] = { .len = sizeof(u16) },
+ [OVS_TUNNEL_KEY_ATTR_OAM] = { .len = 0 },
+ [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = { .type = NLA_NESTED },
+ };
+ const struct nlattr *a[OVS_TUNNEL_KEY_ATTR_MAX + 1];
bool ttl = false;
__be16 tun_flags = 0;
+ enum ovs_tunnel_key_attr type;
+ u64 attrs = 0;
+ int err;
- nla_for_each_nested(a, attr, rem) {
- int type = nla_type(a);
- static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX +
1] = {
- [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64),
- [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32),
- [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32),
- [OVS_TUNNEL_KEY_ATTR_TOS] = 1,
- [OVS_TUNNEL_KEY_ATTR_TTL] = 1,
- [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0,
- [OVS_TUNNEL_KEY_ATTR_CSUM] = 0,
- [OVS_TUNNEL_KEY_ATTR_TP_SRC] = sizeof(u16),
- [OVS_TUNNEL_KEY_ATTR_TP_DST] = sizeof(u16),
- [OVS_TUNNEL_KEY_ATTR_OAM] = 0,
- [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS] = -1,
- };
+ err = parse_nlattrs(attr, a, OVS_TUNNEL_KEY_ATTR_MAX,
+ ovs_tunnel_key_policy, &attrs, true, is_mask);
+ if (err)
+ return err;
- if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
- OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d,
max=%d).\n",
- type, OVS_TUNNEL_KEY_ATTR_MAX);
- return -EINVAL;
- }
+ for (type = 0; type <= OVS_TUNNEL_KEY_ATTR_MAX; type++) {
+ const struct nlattr *nla;
- if (ovs_tunnel_key_lens[type] != nla_len(a) &&
- ovs_tunnel_key_lens[type] != -1) {
- OVS_NLERR("IPv4 tunnel attribute type has unexpected "
- " length (type=%d, length=%d,
expected=%d).\n",
- type, nla_len(a), ovs_tunnel_key_lens[type]);
- return -EINVAL;
- }
+ if (!(attrs & (1ULL << type)))
+ continue;
+ nla = a[type];
switch (type) {
case OVS_TUNNEL_KEY_ATTR_ID:
SW_FLOW_KEY_PUT(match, tun_key.tun_id,
- nla_get_be64(a), is_mask);
+ nla_get_be64(nla), is_mask);
tun_flags |= TUNNEL_KEY;
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
SW_FLOW_KEY_PUT(match, tun_key.ipv4_src,
- nla_get_be32(a), is_mask);
+ nla_get_be32(nla), is_mask);
break;
case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst,
- nla_get_be32(a), is_mask);
+ nla_get_be32(nla), is_mask);
break;
case OVS_TUNNEL_KEY_ATTR_TOS:
SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos,
- nla_get_u8(a), is_mask);
+ nla_get_u8(nla), is_mask);
break;
case OVS_TUNNEL_KEY_ATTR_TTL:
SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl,
- nla_get_u8(a), is_mask);
+ nla_get_u8(nla), is_mask);
ttl = true;
break;
case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
@@ -452,29 +412,29 @@ static int ipv4_tun_from_nlattr(const struct nlattr *attr,
break;
case OVS_TUNNEL_KEY_ATTR_TP_SRC:
SW_FLOW_KEY_PUT(match, tun_key.tp_src,
- nla_get_be16(a), is_mask);
+ nla_get_be16(nla), is_mask);
break;
case OVS_TUNNEL_KEY_ATTR_TP_DST:
SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
- nla_get_be16(a), is_mask);
+ nla_get_be16(nla), is_mask);
break;
case OVS_TUNNEL_KEY_ATTR_OAM:
tun_flags |= TUNNEL_OAM;
break;
case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
tun_flags |= TUNNEL_OPTIONS_PRESENT;
- if (nla_len(a) > sizeof(match->key->tun_opts)) {
+ if (nla_len(nla) > sizeof(match->key->tun_opts)) {
OVS_NLERR("Geneve option length exceeds "
"maximum size (len %d, max %zu).\n",
- nla_len(a),
+ nla_len(nla),
sizeof(match->key->tun_opts));
return -EINVAL;
}
- if (nla_len(a) % 4 != 0) {
+ if (nla_len(nla) % 4 != 0) {
OVS_NLERR("Geneve option length is not "
"a multiple of 4 (len %d).\n",
- nla_len(a));
+ nla_len(nla));
return -EINVAL;
}
@@ -483,7 +443,7 @@ static int ipv4_tun_from_nlattr(const struct nlattr *attr,
* additional options will be silently matched.
*/
if (!is_mask) {
- SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
+ SW_FLOW_KEY_PUT(match, tun_opts_len,
nla_len(nla),
false);
} else {
/* This is somewhat unusual because it looks at
@@ -496,10 +456,10 @@ static int ipv4_tun_from_nlattr(const struct nlattr *attr,
* variable length and we won't have the
* information later.
*/
- if (match->key->tun_opts_len != nla_len(a)) {
+ if (match->key->tun_opts_len != nla_len(nla)) {
OVS_NLERR("Geneve option key length
(%d)"
" is different from mask length
(%d).",
- match->key->tun_opts_len,
nla_len(a));
+ match->key->tun_opts_len,
nla_len(nla));
return -EINVAL;
}
@@ -509,8 +469,8 @@ static int ipv4_tun_from_nlattr(const struct nlattr *attr,
SW_FLOW_KEY_MEMCPY_OFFSET(match,
(unsigned long)GENEVE_OPTS((struct sw_flow_key
*)0,
- nla_len(a)),
- nla_data(a), nla_len(a), is_mask);
+ nla_len(nla)),
+ nla_data(nla), nla_len(nla), is_mask);
break;
default:
OVS_NLERR("Unknown IPv4 tunnel attribute (%d).\n",
type);
@@ -520,11 +480,6 @@ static int ipv4_tun_from_nlattr(const struct nlattr *attr,
SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
- if (rem > 0) {
- OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem);
- return -EINVAL;
- }
-
if (!is_mask) {
if (!match->key->tun_key.ipv4_dst) {
OVS_NLERR("IPv4 tunnel destination address is zero.\n");
@@ -903,10 +858,8 @@ static void nlattr_set(struct nlattr *attr, u8 val, bool
is_attr_mask_key)
/* The nlattr stream should already have been validated */
nla_for_each_nested(nla, attr, rem) {
- /* We assume that ovs_key_lens[type] == -1 means that type is a
- * nested attribute
- */
- if (is_attr_mask_key && ovs_key_lens[nla_type(nla)] == -1)
+ if (is_attr_mask_key &&
+ ovs_key_policy[nla_type(nla)].type == NLA_NESTED)
nlattr_set(nla, val, false);
else
memset(nla_data(nla), val, nla_len(nla));
@@ -1605,8 +1558,8 @@ static int validate_set(const struct nlattr *a,
return -EINVAL;
if (key_type > OVS_KEY_ATTR_MAX ||
- (ovs_key_lens[key_type] != nla_len(ovs_key) &&
- ovs_key_lens[key_type] != -1))
+ (ovs_key_policy[key_type].len != nla_len(ovs_key) &&
+ ovs_key_policy[key_type].type != NLA_NESTED))
return -EINVAL;
switch (key_type) {
--
1.7.10.4
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