From 81bfe3c3cf153441588e50a57f53bc9816f37d37 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Thu, 15 Jan 2015 03:53:58 +0100 Subject: openvswitch: Allow for any level of nesting in flow attributes nlattr_set() is currently hardcoded to two levels of nesting. This change introduces struct ovs_len_tbl to define minimal length requirements plus next level nesting tables to traverse the key attributes to arbitrary depth. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/openvswitch/flow_netlink.c | 106 ++++++++++++++++++++++------------------- 1 file changed, 56 insertions(+), 50 deletions(-) (limited to 'net/openvswitch/flow_netlink.c') diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c index 2e8a9cd10802..518941c5bdf1 100644 --- a/net/openvswitch/flow_netlink.c +++ b/net/openvswitch/flow_netlink.c @@ -50,6 +50,13 @@ #include "flow_netlink.h" +struct ovs_len_tbl { + int len; + const struct ovs_len_tbl *next; +}; + +#define OVS_ATTR_NESTED -1 + static void update_range(struct sw_flow_match *match, size_t offset, size_t size, bool is_mask) { @@ -289,29 +296,44 @@ size_t ovs_key_attr_size(void) + nla_total_size(28); /* OVS_KEY_ATTR_ND */ } +static const struct ovs_len_tbl ovs_tunnel_key_lens[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] = { .len = OVS_ATTR_NESTED }, +}; + /* 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_RECIRC_ID] = sizeof(u32), - [OVS_KEY_ATTR_DP_HASH] = sizeof(u32), - [OVS_KEY_ATTR_TUNNEL] = -1, - [OVS_KEY_ATTR_MPLS] = sizeof(struct ovs_key_mpls), +static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { + [OVS_KEY_ATTR_ENCAP] = { .len = OVS_ATTR_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_RECIRC_ID] = { .len = sizeof(u32) }, + [OVS_KEY_ATTR_DP_HASH] = { .len = sizeof(u32) }, + [OVS_KEY_ATTR_TUNNEL] = { .len = OVS_ATTR_NESTED, + .next = ovs_tunnel_key_lens, }, + [OVS_KEY_ATTR_MPLS] = { .len = sizeof(struct ovs_key_mpls) }, }; static bool is_all_zero(const u8 *fp, size_t size) @@ -352,8 +374,8 @@ static int __parse_flow_nlattrs(const struct nlattr *attr, return -EINVAL; } - expected_len = ovs_key_lens[type]; - if (nla_len(nla) != expected_len && expected_len != -1) { + expected_len = ovs_key_lens[type].len; + if (nla_len(nla) != expected_len && expected_len != OVS_ATTR_NESTED) { OVS_NLERR(log, "Key %d has unexpected len %d expected %d", type, nla_len(nla), expected_len); return -EINVAL; @@ -451,30 +473,16 @@ static int ipv4_tun_from_nlattr(const struct nlattr *attr, int type = nla_type(a); int err; - 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, - }; - if (type > OVS_TUNNEL_KEY_ATTR_MAX) { OVS_NLERR(log, "Tunnel attr %d out of range max %d", type, OVS_TUNNEL_KEY_ATTR_MAX); return -EINVAL; } - if (ovs_tunnel_key_lens[type] != nla_len(a) && - ovs_tunnel_key_lens[type] != -1) { + if (ovs_tunnel_key_lens[type].len != nla_len(a) && + ovs_tunnel_key_lens[type].len != OVS_ATTR_NESTED) { OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d", - type, nla_len(a), ovs_tunnel_key_lens[type]); + type, nla_len(a), ovs_tunnel_key_lens[type].len); return -EINVAL; } @@ -912,18 +920,16 @@ static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs, return 0; } -static void nlattr_set(struct nlattr *attr, u8 val, bool is_attr_mask_key) +static void nlattr_set(struct nlattr *attr, u8 val, + const struct ovs_len_tbl *tbl) { struct nlattr *nla; int rem; /* 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) - nlattr_set(nla, val, false); + if (tbl && tbl[nla_type(nla)].len == OVS_ATTR_NESTED) + nlattr_set(nla, val, tbl[nla_type(nla)].next); else memset(nla_data(nla), val, nla_len(nla)); } @@ -931,7 +937,7 @@ static void nlattr_set(struct nlattr *attr, u8 val, bool is_attr_mask_key) static void mask_set_nlattr(struct nlattr *attr, u8 val) { - nlattr_set(attr, val, true); + nlattr_set(attr, val, ovs_key_lens); } /** @@ -1628,8 +1634,8 @@ 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_lens[key_type].len != nla_len(ovs_key) && + ovs_key_lens[key_type].len != OVS_ATTR_NESTED)) return -EINVAL; switch (key_type) { -- cgit v1.2.3