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@@ -45,202 +45,40 @@
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#include <net/ipv6.h>
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#include <net/ndisc.h>
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-static struct kmem_cache *flow_cache;
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-
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-static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask,
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- struct sw_flow_key_range *range, u8 val);
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-
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-static void update_range__(struct sw_flow_match *match,
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- size_t offset, size_t size, bool is_mask)
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+u64 ovs_flow_used_time(unsigned long flow_jiffies)
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{
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- struct sw_flow_key_range *range = NULL;
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- size_t start = rounddown(offset, sizeof(long));
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- size_t end = roundup(offset + size, sizeof(long));
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-
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- if (!is_mask)
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- range = &match->range;
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- else if (match->mask)
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- range = &match->mask->range;
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-
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- if (!range)
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- return;
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-
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- if (range->start == range->end) {
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- range->start = start;
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- range->end = end;
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- return;
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- }
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-
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- if (range->start > start)
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- range->start = start;
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+ struct timespec cur_ts;
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+ u64 cur_ms, idle_ms;
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- if (range->end < end)
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- range->end = end;
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-}
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+ ktime_get_ts(&cur_ts);
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+ idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
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+ cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
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+ cur_ts.tv_nsec / NSEC_PER_MSEC;
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-#define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
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- do { \
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- update_range__(match, offsetof(struct sw_flow_key, field), \
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- sizeof((match)->key->field), is_mask); \
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- if (is_mask) { \
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- if ((match)->mask) \
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- (match)->mask->key.field = value; \
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- } else { \
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- (match)->key->field = value; \
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- } \
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- } while (0)
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-
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-#define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
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- do { \
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- update_range__(match, offsetof(struct sw_flow_key, field), \
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- len, is_mask); \
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- if (is_mask) { \
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- if ((match)->mask) \
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- memcpy(&(match)->mask->key.field, value_p, len);\
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- } else { \
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- memcpy(&(match)->key->field, value_p, len); \
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- } \
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- } while (0)
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-
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-static u16 range_n_bytes(const struct sw_flow_key_range *range)
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-{
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- return range->end - range->start;
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+ return cur_ms - idle_ms;
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}
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-void ovs_match_init(struct sw_flow_match *match,
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- struct sw_flow_key *key,
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- struct sw_flow_mask *mask)
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-{
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- memset(match, 0, sizeof(*match));
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- match->key = key;
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- match->mask = mask;
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-
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- memset(key, 0, sizeof(*key));
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-
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- if (mask) {
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- memset(&mask->key, 0, sizeof(mask->key));
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- mask->range.start = mask->range.end = 0;
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- }
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-}
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+#define TCP_FLAGS_OFFSET 13
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+#define TCP_FLAG_MASK 0x3f
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-static bool ovs_match_validate(const struct sw_flow_match *match,
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- u64 key_attrs, u64 mask_attrs)
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+void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb)
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{
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- u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET;
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- u64 mask_allowed = key_attrs; /* At most allow all key attributes */
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-
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- /* The following mask attributes allowed only if they
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- * pass the validation tests. */
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- mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
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- | (1 << OVS_KEY_ATTR_IPV6)
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- | (1 << OVS_KEY_ATTR_TCP)
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- | (1 << OVS_KEY_ATTR_UDP)
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- | (1 << OVS_KEY_ATTR_SCTP)
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- | (1 << OVS_KEY_ATTR_ICMP)
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- | (1 << OVS_KEY_ATTR_ICMPV6)
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- | (1 << OVS_KEY_ATTR_ARP)
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- | (1 << OVS_KEY_ATTR_ND));
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-
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- /* Always allowed mask fields. */
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- mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
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- | (1 << OVS_KEY_ATTR_IN_PORT)
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- | (1 << OVS_KEY_ATTR_ETHERTYPE));
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-
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- /* Check key attributes. */
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- if (match->key->eth.type == htons(ETH_P_ARP)
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- || match->key->eth.type == htons(ETH_P_RARP)) {
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- key_expected |= 1 << OVS_KEY_ATTR_ARP;
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- if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
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- mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
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- }
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-
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- if (match->key->eth.type == htons(ETH_P_IP)) {
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- key_expected |= 1 << OVS_KEY_ATTR_IPV4;
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- if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
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- mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
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-
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- if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
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- if (match->key->ip.proto == IPPROTO_UDP) {
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- key_expected |= 1 << OVS_KEY_ATTR_UDP;
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- if (match->mask && (match->mask->key.ip.proto == 0xff))
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- mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
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- }
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-
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- if (match->key->ip.proto == IPPROTO_SCTP) {
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- key_expected |= 1 << OVS_KEY_ATTR_SCTP;
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- if (match->mask && (match->mask->key.ip.proto == 0xff))
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- mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
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- }
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-
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- if (match->key->ip.proto == IPPROTO_TCP) {
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- key_expected |= 1 << OVS_KEY_ATTR_TCP;
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- if (match->mask && (match->mask->key.ip.proto == 0xff))
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- mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
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- }
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-
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- if (match->key->ip.proto == IPPROTO_ICMP) {
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- key_expected |= 1 << OVS_KEY_ATTR_ICMP;
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- if (match->mask && (match->mask->key.ip.proto == 0xff))
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- mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
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- }
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- }
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- }
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-
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- if (match->key->eth.type == htons(ETH_P_IPV6)) {
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- key_expected |= 1 << OVS_KEY_ATTR_IPV6;
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- if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
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- mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
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-
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- if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
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- if (match->key->ip.proto == IPPROTO_UDP) {
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- key_expected |= 1 << OVS_KEY_ATTR_UDP;
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- if (match->mask && (match->mask->key.ip.proto == 0xff))
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- mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
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- }
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-
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- if (match->key->ip.proto == IPPROTO_SCTP) {
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- key_expected |= 1 << OVS_KEY_ATTR_SCTP;
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- if (match->mask && (match->mask->key.ip.proto == 0xff))
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- mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
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- }
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-
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- if (match->key->ip.proto == IPPROTO_TCP) {
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- key_expected |= 1 << OVS_KEY_ATTR_TCP;
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- if (match->mask && (match->mask->key.ip.proto == 0xff))
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- mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
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- }
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-
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- if (match->key->ip.proto == IPPROTO_ICMPV6) {
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- key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
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- if (match->mask && (match->mask->key.ip.proto == 0xff))
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- mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
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-
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- if (match->key->ipv6.tp.src ==
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- htons(NDISC_NEIGHBOUR_SOLICITATION) ||
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- match->key->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
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- key_expected |= 1 << OVS_KEY_ATTR_ND;
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- if (match->mask && (match->mask->key.ipv6.tp.src == htons(0xffff)))
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- mask_allowed |= 1 << OVS_KEY_ATTR_ND;
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- }
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- }
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- }
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- }
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-
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- if ((key_attrs & key_expected) != key_expected) {
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- /* Key attributes check failed. */
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- OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n",
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- key_attrs, key_expected);
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- return false;
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- }
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+ u8 tcp_flags = 0;
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- if ((mask_attrs & mask_allowed) != mask_attrs) {
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- /* Mask attributes check failed. */
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- OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n",
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- mask_attrs, mask_allowed);
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- return false;
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+ if ((flow->key.eth.type == htons(ETH_P_IP) ||
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+ flow->key.eth.type == htons(ETH_P_IPV6)) &&
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+ flow->key.ip.proto == IPPROTO_TCP &&
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+ likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) {
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+ u8 *tcp = (u8 *)tcp_hdr(skb);
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+ tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK;
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}
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- return true;
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+ spin_lock(&flow->lock);
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+ flow->used = jiffies;
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+ flow->packet_count++;
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+ flow->byte_count += skb->len;
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+ flow->tcp_flags |= tcp_flags;
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+ spin_unlock(&flow->lock);
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}
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static int check_header(struct sk_buff *skb, int len)
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@@ -311,19 +149,6 @@ static bool icmphdr_ok(struct sk_buff *skb)
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sizeof(struct icmphdr));
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}
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-u64 ovs_flow_used_time(unsigned long flow_jiffies)
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-{
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- struct timespec cur_ts;
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- u64 cur_ms, idle_ms;
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-
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- ktime_get_ts(&cur_ts);
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- idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
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- cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
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- cur_ts.tv_nsec / NSEC_PER_MSEC;
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-
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- return cur_ms - idle_ms;
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-}
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-
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static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
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{
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unsigned int nh_ofs = skb_network_offset(skb);
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@@ -372,311 +197,6 @@ static bool icmp6hdr_ok(struct sk_buff *skb)
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sizeof(struct icmp6hdr));
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}
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-void ovs_flow_key_mask(struct sw_flow_key *dst, const struct sw_flow_key *src,
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- const struct sw_flow_mask *mask)
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-{
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- const long *m = (long *)((u8 *)&mask->key + mask->range.start);
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- const long *s = (long *)((u8 *)src + mask->range.start);
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- long *d = (long *)((u8 *)dst + mask->range.start);
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- int i;
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-
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- /* The memory outside of the 'mask->range' are not set since
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- * further operations on 'dst' only uses contents within
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- * 'mask->range'.
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- */
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- for (i = 0; i < range_n_bytes(&mask->range); i += sizeof(long))
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- *d++ = *s++ & *m++;
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-}
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-
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-#define TCP_FLAGS_OFFSET 13
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-#define TCP_FLAG_MASK 0x3f
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-
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-void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb)
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-{
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- u8 tcp_flags = 0;
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-
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- if ((flow->key.eth.type == htons(ETH_P_IP) ||
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- flow->key.eth.type == htons(ETH_P_IPV6)) &&
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- flow->key.ip.proto == IPPROTO_TCP &&
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- likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) {
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- u8 *tcp = (u8 *)tcp_hdr(skb);
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- tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK;
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- }
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-
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- spin_lock(&flow->lock);
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- flow->used = jiffies;
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- flow->packet_count++;
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- flow->byte_count += skb->len;
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- flow->tcp_flags |= tcp_flags;
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- spin_unlock(&flow->lock);
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-}
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-
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-struct sw_flow_actions *ovs_flow_actions_alloc(int size)
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-{
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- struct sw_flow_actions *sfa;
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-
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- if (size > MAX_ACTIONS_BUFSIZE)
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- return ERR_PTR(-EINVAL);
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-
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- sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
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- if (!sfa)
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- return ERR_PTR(-ENOMEM);
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-
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- sfa->actions_len = 0;
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- return sfa;
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-}
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-
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-struct sw_flow *ovs_flow_alloc(void)
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-{
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- struct sw_flow *flow;
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-
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- flow = kmem_cache_alloc(flow_cache, GFP_KERNEL);
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- if (!flow)
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- return ERR_PTR(-ENOMEM);
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-
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- spin_lock_init(&flow->lock);
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- flow->sf_acts = NULL;
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- flow->mask = NULL;
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-
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- return flow;
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-}
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-
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-static struct hlist_head *find_bucket(struct flow_table *table, u32 hash)
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-{
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- hash = jhash_1word(hash, table->hash_seed);
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- return flex_array_get(table->buckets,
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- (hash & (table->n_buckets - 1)));
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-}
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-
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-static struct flex_array *alloc_buckets(unsigned int n_buckets)
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-{
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- struct flex_array *buckets;
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- int i, err;
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-
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- buckets = flex_array_alloc(sizeof(struct hlist_head),
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- n_buckets, GFP_KERNEL);
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- if (!buckets)
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- return NULL;
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-
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- err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL);
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- if (err) {
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- flex_array_free(buckets);
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- return NULL;
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- }
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-
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- for (i = 0; i < n_buckets; i++)
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- INIT_HLIST_HEAD((struct hlist_head *)
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- flex_array_get(buckets, i));
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-
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- return buckets;
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-}
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-
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-static void free_buckets(struct flex_array *buckets)
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-{
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- flex_array_free(buckets);
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-}
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-
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-static struct flow_table *__flow_tbl_alloc(int new_size)
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-{
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- struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL);
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-
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- if (!table)
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- return NULL;
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-
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- table->buckets = alloc_buckets(new_size);
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-
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- if (!table->buckets) {
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- kfree(table);
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- return NULL;
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- }
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- table->n_buckets = new_size;
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- table->count = 0;
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- table->node_ver = 0;
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- table->keep_flows = false;
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- get_random_bytes(&table->hash_seed, sizeof(u32));
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- table->mask_list = NULL;
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-
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- return table;
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-}
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-
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-static void __flow_tbl_destroy(struct flow_table *table)
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-{
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- int i;
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-
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- if (table->keep_flows)
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- goto skip_flows;
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-
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- for (i = 0; i < table->n_buckets; i++) {
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- struct sw_flow *flow;
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- struct hlist_head *head = flex_array_get(table->buckets, i);
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- struct hlist_node *n;
|
|
|
- int ver = table->node_ver;
|
|
|
-
|
|
|
- hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) {
|
|
|
- hlist_del(&flow->hash_node[ver]);
|
|
|
- ovs_flow_free(flow, false);
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- BUG_ON(!list_empty(table->mask_list));
|
|
|
- kfree(table->mask_list);
|
|
|
-
|
|
|
-skip_flows:
|
|
|
- free_buckets(table->buckets);
|
|
|
- kfree(table);
|
|
|
-}
|
|
|
-
|
|
|
-struct flow_table *ovs_flow_tbl_alloc(int new_size)
|
|
|
-{
|
|
|
- struct flow_table *table = __flow_tbl_alloc(new_size);
|
|
|
-
|
|
|
- if (!table)
|
|
|
- return NULL;
|
|
|
-
|
|
|
- table->mask_list = kmalloc(sizeof(struct list_head), GFP_KERNEL);
|
|
|
- if (!table->mask_list) {
|
|
|
- table->keep_flows = true;
|
|
|
- __flow_tbl_destroy(table);
|
|
|
- return NULL;
|
|
|
- }
|
|
|
- INIT_LIST_HEAD(table->mask_list);
|
|
|
-
|
|
|
- return table;
|
|
|
-}
|
|
|
-
|
|
|
-static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu)
|
|
|
-{
|
|
|
- struct flow_table *table = container_of(rcu, struct flow_table, rcu);
|
|
|
-
|
|
|
- __flow_tbl_destroy(table);
|
|
|
-}
|
|
|
-
|
|
|
-void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred)
|
|
|
-{
|
|
|
- if (!table)
|
|
|
- return;
|
|
|
-
|
|
|
- if (deferred)
|
|
|
- call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb);
|
|
|
- else
|
|
|
- __flow_tbl_destroy(table);
|
|
|
-}
|
|
|
-
|
|
|
-struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *last)
|
|
|
-{
|
|
|
- struct sw_flow *flow;
|
|
|
- struct hlist_head *head;
|
|
|
- int ver;
|
|
|
- int i;
|
|
|
-
|
|
|
- ver = table->node_ver;
|
|
|
- while (*bucket < table->n_buckets) {
|
|
|
- i = 0;
|
|
|
- head = flex_array_get(table->buckets, *bucket);
|
|
|
- hlist_for_each_entry_rcu(flow, head, hash_node[ver]) {
|
|
|
- if (i < *last) {
|
|
|
- i++;
|
|
|
- continue;
|
|
|
- }
|
|
|
- *last = i + 1;
|
|
|
- return flow;
|
|
|
- }
|
|
|
- (*bucket)++;
|
|
|
- *last = 0;
|
|
|
- }
|
|
|
-
|
|
|
- return NULL;
|
|
|
-}
|
|
|
-
|
|
|
-static void __tbl_insert(struct flow_table *table, struct sw_flow *flow)
|
|
|
-{
|
|
|
- struct hlist_head *head;
|
|
|
-
|
|
|
- head = find_bucket(table, flow->hash);
|
|
|
- hlist_add_head_rcu(&flow->hash_node[table->node_ver], head);
|
|
|
-
|
|
|
- table->count++;
|
|
|
-}
|
|
|
-
|
|
|
-static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new)
|
|
|
-{
|
|
|
- int old_ver;
|
|
|
- int i;
|
|
|
-
|
|
|
- old_ver = old->node_ver;
|
|
|
- new->node_ver = !old_ver;
|
|
|
-
|
|
|
- /* Insert in new table. */
|
|
|
- for (i = 0; i < old->n_buckets; i++) {
|
|
|
- struct sw_flow *flow;
|
|
|
- struct hlist_head *head;
|
|
|
-
|
|
|
- head = flex_array_get(old->buckets, i);
|
|
|
-
|
|
|
- hlist_for_each_entry(flow, head, hash_node[old_ver])
|
|
|
- __tbl_insert(new, flow);
|
|
|
- }
|
|
|
-
|
|
|
- new->mask_list = old->mask_list;
|
|
|
- old->keep_flows = true;
|
|
|
-}
|
|
|
-
|
|
|
-static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets)
|
|
|
-{
|
|
|
- struct flow_table *new_table;
|
|
|
-
|
|
|
- new_table = __flow_tbl_alloc(n_buckets);
|
|
|
- if (!new_table)
|
|
|
- return ERR_PTR(-ENOMEM);
|
|
|
-
|
|
|
- flow_table_copy_flows(table, new_table);
|
|
|
-
|
|
|
- return new_table;
|
|
|
-}
|
|
|
-
|
|
|
-struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table)
|
|
|
-{
|
|
|
- return __flow_tbl_rehash(table, table->n_buckets);
|
|
|
-}
|
|
|
-
|
|
|
-struct flow_table *ovs_flow_tbl_expand(struct flow_table *table)
|
|
|
-{
|
|
|
- return __flow_tbl_rehash(table, table->n_buckets * 2);
|
|
|
-}
|
|
|
-
|
|
|
-static void __flow_free(struct sw_flow *flow)
|
|
|
-{
|
|
|
- kfree((struct sf_flow_acts __force *)flow->sf_acts);
|
|
|
- kmem_cache_free(flow_cache, flow);
|
|
|
-}
|
|
|
-
|
|
|
-static void rcu_free_flow_callback(struct rcu_head *rcu)
|
|
|
-{
|
|
|
- struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu);
|
|
|
-
|
|
|
- __flow_free(flow);
|
|
|
-}
|
|
|
-
|
|
|
-void ovs_flow_free(struct sw_flow *flow, bool deferred)
|
|
|
-{
|
|
|
- if (!flow)
|
|
|
- return;
|
|
|
-
|
|
|
- ovs_sw_flow_mask_del_ref(flow->mask, deferred);
|
|
|
-
|
|
|
- if (deferred)
|
|
|
- call_rcu(&flow->rcu, rcu_free_flow_callback);
|
|
|
- else
|
|
|
- __flow_free(flow);
|
|
|
-}
|
|
|
-
|
|
|
-/* Schedules 'sf_acts' to be freed after the next RCU grace period.
|
|
|
- * The caller must hold rcu_read_lock for this to be sensible. */
|
|
|
-void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts)
|
|
|
-{
|
|
|
- kfree_rcu(sf_acts, rcu);
|
|
|
-}
|
|
|
-
|
|
|
static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
|
|
|
{
|
|
|
struct qtag_prefix {
|
|
|
@@ -1002,1080 +522,3 @@ int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key)
|
|
|
|
|
|
return 0;
|
|
|
}
|
|
|
-
|
|
|
-static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start,
|
|
|
- int key_end)
|
|
|
-{
|
|
|
- u32 *hash_key = (u32 *)((u8 *)key + key_start);
|
|
|
- int hash_u32s = (key_end - key_start) >> 2;
|
|
|
-
|
|
|
- /* Make sure number of hash bytes are multiple of u32. */
|
|
|
- BUILD_BUG_ON(sizeof(long) % sizeof(u32));
|
|
|
-
|
|
|
- return jhash2(hash_key, hash_u32s, 0);
|
|
|
-}
|
|
|
-
|
|
|
-static int flow_key_start(const struct sw_flow_key *key)
|
|
|
-{
|
|
|
- if (key->tun_key.ipv4_dst)
|
|
|
- return 0;
|
|
|
- else
|
|
|
- return rounddown(offsetof(struct sw_flow_key, phy),
|
|
|
- sizeof(long));
|
|
|
-}
|
|
|
-
|
|
|
-static bool __cmp_key(const struct sw_flow_key *key1,
|
|
|
- const struct sw_flow_key *key2, int key_start, int key_end)
|
|
|
-{
|
|
|
- const long *cp1 = (long *)((u8 *)key1 + key_start);
|
|
|
- const long *cp2 = (long *)((u8 *)key2 + key_start);
|
|
|
- long diffs = 0;
|
|
|
- int i;
|
|
|
-
|
|
|
- for (i = key_start; i < key_end; i += sizeof(long))
|
|
|
- diffs |= *cp1++ ^ *cp2++;
|
|
|
-
|
|
|
- return diffs == 0;
|
|
|
-}
|
|
|
-
|
|
|
-static bool __flow_cmp_masked_key(const struct sw_flow *flow,
|
|
|
- const struct sw_flow_key *key, int key_start, int key_end)
|
|
|
-{
|
|
|
- return __cmp_key(&flow->key, key, key_start, key_end);
|
|
|
-}
|
|
|
-
|
|
|
-static bool __flow_cmp_unmasked_key(const struct sw_flow *flow,
|
|
|
- const struct sw_flow_key *key, int key_start, int key_end)
|
|
|
-{
|
|
|
- return __cmp_key(&flow->unmasked_key, key, key_start, key_end);
|
|
|
-}
|
|
|
-
|
|
|
-bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow,
|
|
|
- const struct sw_flow_key *key, int key_end)
|
|
|
-{
|
|
|
- int key_start;
|
|
|
- key_start = flow_key_start(key);
|
|
|
-
|
|
|
- return __flow_cmp_unmasked_key(flow, key, key_start, key_end);
|
|
|
-
|
|
|
-}
|
|
|
-
|
|
|
-struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table,
|
|
|
- struct sw_flow_match *match)
|
|
|
-{
|
|
|
- struct sw_flow_key *unmasked = match->key;
|
|
|
- int key_end = match->range.end;
|
|
|
- struct sw_flow *flow;
|
|
|
-
|
|
|
- flow = ovs_flow_lookup(table, unmasked);
|
|
|
- if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_end)))
|
|
|
- flow = NULL;
|
|
|
-
|
|
|
- return flow;
|
|
|
-}
|
|
|
-
|
|
|
-static struct sw_flow *ovs_masked_flow_lookup(struct flow_table *table,
|
|
|
- const struct sw_flow_key *unmasked,
|
|
|
- struct sw_flow_mask *mask)
|
|
|
-{
|
|
|
- struct sw_flow *flow;
|
|
|
- struct hlist_head *head;
|
|
|
- int key_start = mask->range.start;
|
|
|
- int key_end = mask->range.end;
|
|
|
- u32 hash;
|
|
|
- struct sw_flow_key masked_key;
|
|
|
-
|
|
|
- ovs_flow_key_mask(&masked_key, unmasked, mask);
|
|
|
- hash = ovs_flow_hash(&masked_key, key_start, key_end);
|
|
|
- head = find_bucket(table, hash);
|
|
|
- hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) {
|
|
|
- if (flow->mask == mask &&
|
|
|
- __flow_cmp_masked_key(flow, &masked_key,
|
|
|
- key_start, key_end))
|
|
|
- return flow;
|
|
|
- }
|
|
|
- return NULL;
|
|
|
-}
|
|
|
-
|
|
|
-struct sw_flow *ovs_flow_lookup(struct flow_table *tbl,
|
|
|
- const struct sw_flow_key *key)
|
|
|
-{
|
|
|
- struct sw_flow *flow = NULL;
|
|
|
- struct sw_flow_mask *mask;
|
|
|
-
|
|
|
- list_for_each_entry_rcu(mask, tbl->mask_list, list) {
|
|
|
- flow = ovs_masked_flow_lookup(tbl, key, mask);
|
|
|
- if (flow) /* Found */
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- return flow;
|
|
|
-}
|
|
|
-
|
|
|
-
|
|
|
-void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow)
|
|
|
-{
|
|
|
- flow->hash = ovs_flow_hash(&flow->key, flow->mask->range.start,
|
|
|
- flow->mask->range.end);
|
|
|
- __tbl_insert(table, flow);
|
|
|
-}
|
|
|
-
|
|
|
-void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow)
|
|
|
-{
|
|
|
- BUG_ON(table->count == 0);
|
|
|
- hlist_del_rcu(&flow->hash_node[table->node_ver]);
|
|
|
- table->count--;
|
|
|
-}
|
|
|
-
|
|
|
-/* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */
|
|
|
-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_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_TUNNEL] = -1,
|
|
|
-};
|
|
|
-
|
|
|
-static bool is_all_zero(const u8 *fp, size_t size)
|
|
|
-{
|
|
|
- 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;
|
|
|
- u32 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 & (1 << 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;
|
|
|
- }
|
|
|
-
|
|
|
- if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
|
|
|
- attrs |= 1 << type;
|
|
|
- a[type] = nla;
|
|
|
- }
|
|
|
- }
|
|
|
- if (rem) {
|
|
|
- OVS_NLERR("Message has %d unknown bytes.\n", rem);
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- *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);
|
|
|
-}
|
|
|
-
|
|
|
-static int parse_flow_nlattrs(const struct nlattr *attr,
|
|
|
- const struct nlattr *a[], u64 *attrsp)
|
|
|
-{
|
|
|
- return __parse_flow_nlattrs(attr, a, attrsp, false);
|
|
|
-}
|
|
|
-
|
|
|
-int ovs_ipv4_tun_from_nlattr(const struct nlattr *attr,
|
|
|
- struct sw_flow_match *match, bool is_mask)
|
|
|
-{
|
|
|
- struct nlattr *a;
|
|
|
- int rem;
|
|
|
- bool ttl = false;
|
|
|
- __be16 tun_flags = 0;
|
|
|
-
|
|
|
- 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,
|
|
|
- };
|
|
|
-
|
|
|
- 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;
|
|
|
- }
|
|
|
-
|
|
|
- if (ovs_tunnel_key_lens[type] != nla_len(a)) {
|
|
|
- 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;
|
|
|
- }
|
|
|
-
|
|
|
- switch (type) {
|
|
|
- case OVS_TUNNEL_KEY_ATTR_ID:
|
|
|
- SW_FLOW_KEY_PUT(match, tun_key.tun_id,
|
|
|
- nla_get_be64(a), 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);
|
|
|
- break;
|
|
|
- case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
|
|
|
- SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst,
|
|
|
- nla_get_be32(a), is_mask);
|
|
|
- break;
|
|
|
- case OVS_TUNNEL_KEY_ATTR_TOS:
|
|
|
- SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos,
|
|
|
- nla_get_u8(a), is_mask);
|
|
|
- break;
|
|
|
- case OVS_TUNNEL_KEY_ATTR_TTL:
|
|
|
- SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl,
|
|
|
- nla_get_u8(a), is_mask);
|
|
|
- ttl = true;
|
|
|
- break;
|
|
|
- case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
|
|
|
- tun_flags |= TUNNEL_DONT_FRAGMENT;
|
|
|
- break;
|
|
|
- case OVS_TUNNEL_KEY_ATTR_CSUM:
|
|
|
- tun_flags |= TUNNEL_CSUM;
|
|
|
- break;
|
|
|
- default:
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- 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");
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- if (!ttl) {
|
|
|
- OVS_NLERR("IPv4 tunnel TTL not specified.\n");
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-int ovs_ipv4_tun_to_nlattr(struct sk_buff *skb,
|
|
|
- const struct ovs_key_ipv4_tunnel *tun_key,
|
|
|
- const struct ovs_key_ipv4_tunnel *output)
|
|
|
-{
|
|
|
- struct nlattr *nla;
|
|
|
-
|
|
|
- nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
|
|
|
- if (!nla)
|
|
|
- return -EMSGSIZE;
|
|
|
-
|
|
|
- if (output->tun_flags & TUNNEL_KEY &&
|
|
|
- nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
|
|
|
- return -EMSGSIZE;
|
|
|
- if (output->ipv4_src &&
|
|
|
- nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src))
|
|
|
- return -EMSGSIZE;
|
|
|
- if (output->ipv4_dst &&
|
|
|
- nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst))
|
|
|
- return -EMSGSIZE;
|
|
|
- if (output->ipv4_tos &&
|
|
|
- nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos))
|
|
|
- return -EMSGSIZE;
|
|
|
- if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl))
|
|
|
- return -EMSGSIZE;
|
|
|
- if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
|
|
|
- nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
|
|
|
- return -EMSGSIZE;
|
|
|
- if ((output->tun_flags & TUNNEL_CSUM) &&
|
|
|
- nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
|
|
|
- return -EMSGSIZE;
|
|
|
-
|
|
|
- nla_nest_end(skb, nla);
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs,
|
|
|
- const struct nlattr **a, bool is_mask)
|
|
|
-{
|
|
|
- if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
|
|
|
- SW_FLOW_KEY_PUT(match, phy.priority,
|
|
|
- nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
|
|
|
- *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
|
|
|
- }
|
|
|
-
|
|
|
- if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
|
|
|
- u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
|
|
|
-
|
|
|
- if (is_mask)
|
|
|
- in_port = 0xffffffff; /* Always exact match in_port. */
|
|
|
- else if (in_port >= DP_MAX_PORTS)
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
|
|
|
- *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
|
|
|
- } else if (!is_mask) {
|
|
|
- SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
|
|
|
- }
|
|
|
-
|
|
|
- if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
|
|
|
- uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
|
|
|
-
|
|
|
- SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
|
|
|
- *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
|
|
|
- }
|
|
|
- if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
|
|
|
- if (ovs_ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
|
|
|
- is_mask))
|
|
|
- return -EINVAL;
|
|
|
- *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
|
|
|
- }
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
|
|
|
- const struct nlattr **a, bool is_mask)
|
|
|
-{
|
|
|
- int err;
|
|
|
- u64 orig_attrs = attrs;
|
|
|
-
|
|
|
- err = metadata_from_nlattrs(match, &attrs, a, is_mask);
|
|
|
- if (err)
|
|
|
- return err;
|
|
|
-
|
|
|
- if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
|
|
|
- const struct ovs_key_ethernet *eth_key;
|
|
|
-
|
|
|
- eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
|
|
|
- SW_FLOW_KEY_MEMCPY(match, eth.src,
|
|
|
- eth_key->eth_src, ETH_ALEN, is_mask);
|
|
|
- SW_FLOW_KEY_MEMCPY(match, eth.dst,
|
|
|
- eth_key->eth_dst, ETH_ALEN, is_mask);
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
|
|
|
- }
|
|
|
-
|
|
|
- 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("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n");
|
|
|
- else
|
|
|
- OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n");
|
|
|
-
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
|
|
|
- } else if (!is_mask)
|
|
|
- SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
|
|
|
-
|
|
|
- if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
|
|
|
- __be16 eth_type;
|
|
|
-
|
|
|
- eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
|
|
|
- if (is_mask) {
|
|
|
- /* Always exact match EtherType. */
|
|
|
- eth_type = htons(0xffff);
|
|
|
- } else if (ntohs(eth_type) < ETH_P_802_3_MIN) {
|
|
|
- OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n",
|
|
|
- ntohs(eth_type), ETH_P_802_3_MIN);
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
|
|
|
- } else if (!is_mask) {
|
|
|
- SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
|
|
|
- }
|
|
|
-
|
|
|
- if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
|
|
|
- const struct ovs_key_ipv4 *ipv4_key;
|
|
|
-
|
|
|
- ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
|
|
|
- if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
|
|
|
- OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n",
|
|
|
- ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- SW_FLOW_KEY_PUT(match, ip.proto,
|
|
|
- ipv4_key->ipv4_proto, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ip.tos,
|
|
|
- ipv4_key->ipv4_tos, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ip.ttl,
|
|
|
- ipv4_key->ipv4_ttl, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ip.frag,
|
|
|
- ipv4_key->ipv4_frag, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.addr.src,
|
|
|
- ipv4_key->ipv4_src, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
|
|
|
- ipv4_key->ipv4_dst, is_mask);
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
|
|
|
- }
|
|
|
-
|
|
|
- if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
|
|
|
- const struct ovs_key_ipv6 *ipv6_key;
|
|
|
-
|
|
|
- ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
|
|
|
- if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
|
|
|
- OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n",
|
|
|
- ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- SW_FLOW_KEY_PUT(match, ipv6.label,
|
|
|
- ipv6_key->ipv6_label, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ip.proto,
|
|
|
- ipv6_key->ipv6_proto, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ip.tos,
|
|
|
- ipv6_key->ipv6_tclass, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ip.ttl,
|
|
|
- ipv6_key->ipv6_hlimit, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ip.frag,
|
|
|
- ipv6_key->ipv6_frag, is_mask);
|
|
|
- SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
|
|
|
- ipv6_key->ipv6_src,
|
|
|
- sizeof(match->key->ipv6.addr.src),
|
|
|
- is_mask);
|
|
|
- SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
|
|
|
- ipv6_key->ipv6_dst,
|
|
|
- sizeof(match->key->ipv6.addr.dst),
|
|
|
- is_mask);
|
|
|
-
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
|
|
|
- }
|
|
|
-
|
|
|
- if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
|
|
|
- const struct ovs_key_arp *arp_key;
|
|
|
-
|
|
|
- arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
|
|
|
- if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
|
|
|
- OVS_NLERR("Unknown ARP opcode (opcode=%d).\n",
|
|
|
- arp_key->arp_op);
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.addr.src,
|
|
|
- arp_key->arp_sip, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
|
|
|
- arp_key->arp_tip, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ip.proto,
|
|
|
- ntohs(arp_key->arp_op), is_mask);
|
|
|
- SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
|
|
|
- arp_key->arp_sha, ETH_ALEN, is_mask);
|
|
|
- SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
|
|
|
- arp_key->arp_tha, ETH_ALEN, is_mask);
|
|
|
-
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_ARP);
|
|
|
- }
|
|
|
-
|
|
|
- if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
|
|
|
- const struct ovs_key_tcp *tcp_key;
|
|
|
-
|
|
|
- tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
|
|
|
- if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) {
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.tp.src,
|
|
|
- tcp_key->tcp_src, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
|
|
|
- tcp_key->tcp_dst, is_mask);
|
|
|
- } else {
|
|
|
- SW_FLOW_KEY_PUT(match, ipv6.tp.src,
|
|
|
- tcp_key->tcp_src, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
|
|
|
- tcp_key->tcp_dst, is_mask);
|
|
|
- }
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_TCP);
|
|
|
- }
|
|
|
-
|
|
|
- if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
|
|
|
- const struct ovs_key_udp *udp_key;
|
|
|
-
|
|
|
- udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
|
|
|
- if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) {
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.tp.src,
|
|
|
- udp_key->udp_src, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
|
|
|
- udp_key->udp_dst, is_mask);
|
|
|
- } else {
|
|
|
- SW_FLOW_KEY_PUT(match, ipv6.tp.src,
|
|
|
- udp_key->udp_src, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
|
|
|
- udp_key->udp_dst, is_mask);
|
|
|
- }
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_UDP);
|
|
|
- }
|
|
|
-
|
|
|
- if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
|
|
|
- const struct ovs_key_sctp *sctp_key;
|
|
|
-
|
|
|
- sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
|
|
|
- if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) {
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.tp.src,
|
|
|
- sctp_key->sctp_src, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
|
|
|
- sctp_key->sctp_dst, is_mask);
|
|
|
- } else {
|
|
|
- SW_FLOW_KEY_PUT(match, ipv6.tp.src,
|
|
|
- sctp_key->sctp_src, is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
|
|
|
- sctp_key->sctp_dst, is_mask);
|
|
|
- }
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
|
|
|
- }
|
|
|
-
|
|
|
- if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
|
|
|
- const struct ovs_key_icmp *icmp_key;
|
|
|
-
|
|
|
- icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.tp.src,
|
|
|
- htons(icmp_key->icmp_type), is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
|
|
|
- htons(icmp_key->icmp_code), is_mask);
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
|
|
|
- }
|
|
|
-
|
|
|
- if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
|
|
|
- const struct ovs_key_icmpv6 *icmpv6_key;
|
|
|
-
|
|
|
- icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv6.tp.src,
|
|
|
- htons(icmpv6_key->icmpv6_type), is_mask);
|
|
|
- SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
|
|
|
- htons(icmpv6_key->icmpv6_code), is_mask);
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
|
|
|
- }
|
|
|
-
|
|
|
- if (attrs & (1 << OVS_KEY_ATTR_ND)) {
|
|
|
- const struct ovs_key_nd *nd_key;
|
|
|
-
|
|
|
- nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
|
|
|
- SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
|
|
|
- nd_key->nd_target,
|
|
|
- sizeof(match->key->ipv6.nd.target),
|
|
|
- is_mask);
|
|
|
- SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
|
|
|
- nd_key->nd_sll, ETH_ALEN, is_mask);
|
|
|
- SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
|
|
|
- nd_key->nd_tll, ETH_ALEN, is_mask);
|
|
|
- attrs &= ~(1 << OVS_KEY_ATTR_ND);
|
|
|
- }
|
|
|
-
|
|
|
- if (attrs != 0)
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/**
|
|
|
- * ovs_match_from_nlattrs - parses Netlink attributes into a flow key and
|
|
|
- * mask. In case the 'mask' is NULL, the flow is treated as exact match
|
|
|
- * flow. Otherwise, it is treated as a wildcarded flow, except the mask
|
|
|
- * does not include any don't care bit.
|
|
|
- * @match: receives the extracted flow match information.
|
|
|
- * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
|
|
|
- * sequence. The fields should of the packet that triggered the creation
|
|
|
- * of this flow.
|
|
|
- * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
|
|
|
- * attribute specifies the mask field of the wildcarded flow.
|
|
|
- */
|
|
|
-int ovs_match_from_nlattrs(struct sw_flow_match *match,
|
|
|
- const struct nlattr *key,
|
|
|
- const struct nlattr *mask)
|
|
|
-{
|
|
|
- const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
|
|
|
- const struct nlattr *encap;
|
|
|
- u64 key_attrs = 0;
|
|
|
- u64 mask_attrs = 0;
|
|
|
- bool encap_valid = false;
|
|
|
- int err;
|
|
|
-
|
|
|
- err = parse_flow_nlattrs(key, a, &key_attrs);
|
|
|
- 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("Invalid Vlan frame.\n");
|
|
|
- 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);
|
|
|
- if (err)
|
|
|
- return err;
|
|
|
- } else if (!tci) {
|
|
|
- /* Corner case for truncated 802.1Q header. */
|
|
|
- if (nla_len(encap)) {
|
|
|
- OVS_NLERR("Truncated 802.1Q header has non-zero encap attribute.\n");
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- } else {
|
|
|
- OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n");
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- err = ovs_key_from_nlattrs(match, key_attrs, a, false);
|
|
|
- if (err)
|
|
|
- return err;
|
|
|
-
|
|
|
- if (mask) {
|
|
|
- err = parse_flow_mask_nlattrs(mask, a, &mask_attrs);
|
|
|
- if (err)
|
|
|
- return err;
|
|
|
-
|
|
|
- if (mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) {
|
|
|
- __be16 eth_type = 0;
|
|
|
- __be16 tci = 0;
|
|
|
-
|
|
|
- if (!encap_valid) {
|
|
|
- OVS_NLERR("Encap mask attribute is set for non-VLAN frame.\n");
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- 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);
|
|
|
- } else {
|
|
|
- OVS_NLERR("VLAN frames must have an exact match on the TPID (mask=%x).\n",
|
|
|
- ntohs(eth_type));
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
-
|
|
|
- if (a[OVS_KEY_ATTR_VLAN])
|
|
|
- tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
|
|
|
-
|
|
|
- if (!(tci & htons(VLAN_TAG_PRESENT))) {
|
|
|
- OVS_NLERR("VLAN tag present bit must have an exact match (tci_mask=%x).\n", ntohs(tci));
|
|
|
- return -EINVAL;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- err = ovs_key_from_nlattrs(match, mask_attrs, a, true);
|
|
|
- if (err)
|
|
|
- return err;
|
|
|
- } else {
|
|
|
- /* Populate exact match flow's key mask. */
|
|
|
- if (match->mask)
|
|
|
- ovs_sw_flow_mask_set(match->mask, &match->range, 0xff);
|
|
|
- }
|
|
|
-
|
|
|
- if (!ovs_match_validate(match, key_attrs, mask_attrs))
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/**
|
|
|
- * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key.
|
|
|
- * @flow: Receives extracted in_port, priority, tun_key and skb_mark.
|
|
|
- * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
|
|
|
- * sequence.
|
|
|
- *
|
|
|
- * This parses a series of Netlink attributes that form a flow key, which must
|
|
|
- * take the same form accepted by flow_from_nlattrs(), but only enough of it to
|
|
|
- * get the metadata, that is, the parts of the flow key that cannot be
|
|
|
- * extracted from the packet itself.
|
|
|
- */
|
|
|
-
|
|
|
-int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow,
|
|
|
- const struct nlattr *attr)
|
|
|
-{
|
|
|
- struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key;
|
|
|
- const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
|
|
|
- u64 attrs = 0;
|
|
|
- int err;
|
|
|
- struct sw_flow_match match;
|
|
|
-
|
|
|
- flow->key.phy.in_port = DP_MAX_PORTS;
|
|
|
- flow->key.phy.priority = 0;
|
|
|
- flow->key.phy.skb_mark = 0;
|
|
|
- memset(tun_key, 0, sizeof(flow->key.tun_key));
|
|
|
-
|
|
|
- err = parse_flow_nlattrs(attr, a, &attrs);
|
|
|
- if (err)
|
|
|
- return -EINVAL;
|
|
|
-
|
|
|
- memset(&match, 0, sizeof(match));
|
|
|
- match.key = &flow->key;
|
|
|
-
|
|
|
- err = metadata_from_nlattrs(&match, &attrs, a, false);
|
|
|
- if (err)
|
|
|
- return err;
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey,
|
|
|
- const struct sw_flow_key *output, struct sk_buff *skb)
|
|
|
-{
|
|
|
- struct ovs_key_ethernet *eth_key;
|
|
|
- struct nlattr *nla, *encap;
|
|
|
- bool is_mask = (swkey != output);
|
|
|
-
|
|
|
- if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
|
|
|
- goto nla_put_failure;
|
|
|
-
|
|
|
- if ((swkey->tun_key.ipv4_dst || is_mask) &&
|
|
|
- ovs_ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key))
|
|
|
- goto nla_put_failure;
|
|
|
-
|
|
|
- if (swkey->phy.in_port == DP_MAX_PORTS) {
|
|
|
- if (is_mask && (output->phy.in_port == 0xffff))
|
|
|
- if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
|
|
|
- goto nla_put_failure;
|
|
|
- } else {
|
|
|
- u16 upper_u16;
|
|
|
- upper_u16 = !is_mask ? 0 : 0xffff;
|
|
|
-
|
|
|
- if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
|
|
|
- (upper_u16 << 16) | output->phy.in_port))
|
|
|
- goto nla_put_failure;
|
|
|
- }
|
|
|
-
|
|
|
- if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
|
|
|
- goto nla_put_failure;
|
|
|
-
|
|
|
- nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
|
|
|
- if (!nla)
|
|
|
- goto nla_put_failure;
|
|
|
-
|
|
|
- eth_key = nla_data(nla);
|
|
|
- memcpy(eth_key->eth_src, output->eth.src, ETH_ALEN);
|
|
|
- memcpy(eth_key->eth_dst, output->eth.dst, ETH_ALEN);
|
|
|
-
|
|
|
- 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))
|
|
|
- goto nla_put_failure;
|
|
|
- encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
|
|
|
- if (!swkey->eth.tci)
|
|
|
- goto unencap;
|
|
|
- } else
|
|
|
- encap = NULL;
|
|
|
-
|
|
|
- if (swkey->eth.type == htons(ETH_P_802_2)) {
|
|
|
- /*
|
|
|
- * Ethertype 802.2 is represented in the netlink with omitted
|
|
|
- * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
|
|
|
- * 0xffff in the mask attribute. Ethertype can also
|
|
|
- * be wildcarded.
|
|
|
- */
|
|
|
- if (is_mask && output->eth.type)
|
|
|
- if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
|
|
|
- output->eth.type))
|
|
|
- goto nla_put_failure;
|
|
|
- goto unencap;
|
|
|
- }
|
|
|
-
|
|
|
- if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
|
|
|
- goto nla_put_failure;
|
|
|
-
|
|
|
- if (swkey->eth.type == htons(ETH_P_IP)) {
|
|
|
- struct ovs_key_ipv4 *ipv4_key;
|
|
|
-
|
|
|
- nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
|
|
|
- if (!nla)
|
|
|
- goto nla_put_failure;
|
|
|
- ipv4_key = nla_data(nla);
|
|
|
- ipv4_key->ipv4_src = output->ipv4.addr.src;
|
|
|
- ipv4_key->ipv4_dst = output->ipv4.addr.dst;
|
|
|
- ipv4_key->ipv4_proto = output->ip.proto;
|
|
|
- ipv4_key->ipv4_tos = output->ip.tos;
|
|
|
- ipv4_key->ipv4_ttl = output->ip.ttl;
|
|
|
- ipv4_key->ipv4_frag = output->ip.frag;
|
|
|
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
|
|
|
- struct ovs_key_ipv6 *ipv6_key;
|
|
|
-
|
|
|
- nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
|
|
|
- if (!nla)
|
|
|
- goto nla_put_failure;
|
|
|
- ipv6_key = nla_data(nla);
|
|
|
- memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
|
|
|
- sizeof(ipv6_key->ipv6_src));
|
|
|
- memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
|
|
|
- sizeof(ipv6_key->ipv6_dst));
|
|
|
- ipv6_key->ipv6_label = output->ipv6.label;
|
|
|
- ipv6_key->ipv6_proto = output->ip.proto;
|
|
|
- ipv6_key->ipv6_tclass = output->ip.tos;
|
|
|
- ipv6_key->ipv6_hlimit = output->ip.ttl;
|
|
|
- ipv6_key->ipv6_frag = output->ip.frag;
|
|
|
- } else if (swkey->eth.type == htons(ETH_P_ARP) ||
|
|
|
- swkey->eth.type == htons(ETH_P_RARP)) {
|
|
|
- struct ovs_key_arp *arp_key;
|
|
|
-
|
|
|
- nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
|
|
|
- if (!nla)
|
|
|
- goto nla_put_failure;
|
|
|
- arp_key = nla_data(nla);
|
|
|
- memset(arp_key, 0, sizeof(struct ovs_key_arp));
|
|
|
- arp_key->arp_sip = output->ipv4.addr.src;
|
|
|
- arp_key->arp_tip = output->ipv4.addr.dst;
|
|
|
- arp_key->arp_op = htons(output->ip.proto);
|
|
|
- memcpy(arp_key->arp_sha, output->ipv4.arp.sha, ETH_ALEN);
|
|
|
- memcpy(arp_key->arp_tha, output->ipv4.arp.tha, ETH_ALEN);
|
|
|
- }
|
|
|
-
|
|
|
- if ((swkey->eth.type == htons(ETH_P_IP) ||
|
|
|
- swkey->eth.type == htons(ETH_P_IPV6)) &&
|
|
|
- swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
|
|
|
-
|
|
|
- if (swkey->ip.proto == IPPROTO_TCP) {
|
|
|
- struct ovs_key_tcp *tcp_key;
|
|
|
-
|
|
|
- nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
|
|
|
- if (!nla)
|
|
|
- goto nla_put_failure;
|
|
|
- tcp_key = nla_data(nla);
|
|
|
- if (swkey->eth.type == htons(ETH_P_IP)) {
|
|
|
- tcp_key->tcp_src = output->ipv4.tp.src;
|
|
|
- tcp_key->tcp_dst = output->ipv4.tp.dst;
|
|
|
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
|
|
|
- tcp_key->tcp_src = output->ipv6.tp.src;
|
|
|
- tcp_key->tcp_dst = output->ipv6.tp.dst;
|
|
|
- }
|
|
|
- } else if (swkey->ip.proto == IPPROTO_UDP) {
|
|
|
- struct ovs_key_udp *udp_key;
|
|
|
-
|
|
|
- nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
|
|
|
- if (!nla)
|
|
|
- goto nla_put_failure;
|
|
|
- udp_key = nla_data(nla);
|
|
|
- if (swkey->eth.type == htons(ETH_P_IP)) {
|
|
|
- udp_key->udp_src = output->ipv4.tp.src;
|
|
|
- udp_key->udp_dst = output->ipv4.tp.dst;
|
|
|
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
|
|
|
- udp_key->udp_src = output->ipv6.tp.src;
|
|
|
- udp_key->udp_dst = output->ipv6.tp.dst;
|
|
|
- }
|
|
|
- } else if (swkey->ip.proto == IPPROTO_SCTP) {
|
|
|
- struct ovs_key_sctp *sctp_key;
|
|
|
-
|
|
|
- nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
|
|
|
- if (!nla)
|
|
|
- goto nla_put_failure;
|
|
|
- sctp_key = nla_data(nla);
|
|
|
- if (swkey->eth.type == htons(ETH_P_IP)) {
|
|
|
- sctp_key->sctp_src = swkey->ipv4.tp.src;
|
|
|
- sctp_key->sctp_dst = swkey->ipv4.tp.dst;
|
|
|
- } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
|
|
|
- sctp_key->sctp_src = swkey->ipv6.tp.src;
|
|
|
- sctp_key->sctp_dst = swkey->ipv6.tp.dst;
|
|
|
- }
|
|
|
- } else if (swkey->eth.type == htons(ETH_P_IP) &&
|
|
|
- swkey->ip.proto == IPPROTO_ICMP) {
|
|
|
- struct ovs_key_icmp *icmp_key;
|
|
|
-
|
|
|
- nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
|
|
|
- if (!nla)
|
|
|
- goto nla_put_failure;
|
|
|
- icmp_key = nla_data(nla);
|
|
|
- icmp_key->icmp_type = ntohs(output->ipv4.tp.src);
|
|
|
- icmp_key->icmp_code = ntohs(output->ipv4.tp.dst);
|
|
|
- } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
|
|
|
- swkey->ip.proto == IPPROTO_ICMPV6) {
|
|
|
- struct ovs_key_icmpv6 *icmpv6_key;
|
|
|
-
|
|
|
- nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
|
|
|
- sizeof(*icmpv6_key));
|
|
|
- if (!nla)
|
|
|
- goto nla_put_failure;
|
|
|
- icmpv6_key = nla_data(nla);
|
|
|
- icmpv6_key->icmpv6_type = ntohs(output->ipv6.tp.src);
|
|
|
- icmpv6_key->icmpv6_code = ntohs(output->ipv6.tp.dst);
|
|
|
-
|
|
|
- if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
|
|
|
- icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
|
|
|
- struct ovs_key_nd *nd_key;
|
|
|
-
|
|
|
- nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
|
|
|
- if (!nla)
|
|
|
- goto nla_put_failure;
|
|
|
- nd_key = nla_data(nla);
|
|
|
- memcpy(nd_key->nd_target, &output->ipv6.nd.target,
|
|
|
- sizeof(nd_key->nd_target));
|
|
|
- memcpy(nd_key->nd_sll, output->ipv6.nd.sll, ETH_ALEN);
|
|
|
- memcpy(nd_key->nd_tll, output->ipv6.nd.tll, ETH_ALEN);
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-unencap:
|
|
|
- if (encap)
|
|
|
- nla_nest_end(skb, encap);
|
|
|
-
|
|
|
- return 0;
|
|
|
-
|
|
|
-nla_put_failure:
|
|
|
- return -EMSGSIZE;
|
|
|
-}
|
|
|
-
|
|
|
-/* Initializes the flow module.
|
|
|
- * Returns zero if successful or a negative error code. */
|
|
|
-int ovs_flow_init(void)
|
|
|
-{
|
|
|
- BUILD_BUG_ON(__alignof__(struct sw_flow_key) % __alignof__(long));
|
|
|
- BUILD_BUG_ON(sizeof(struct sw_flow_key) % sizeof(long));
|
|
|
-
|
|
|
- flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0,
|
|
|
- 0, NULL);
|
|
|
- if (flow_cache == NULL)
|
|
|
- return -ENOMEM;
|
|
|
-
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/* Uninitializes the flow module. */
|
|
|
-void ovs_flow_exit(void)
|
|
|
-{
|
|
|
- kmem_cache_destroy(flow_cache);
|
|
|
-}
|
|
|
-
|
|
|
-struct sw_flow_mask *ovs_sw_flow_mask_alloc(void)
|
|
|
-{
|
|
|
- struct sw_flow_mask *mask;
|
|
|
-
|
|
|
- mask = kmalloc(sizeof(*mask), GFP_KERNEL);
|
|
|
- if (mask)
|
|
|
- mask->ref_count = 0;
|
|
|
-
|
|
|
- return mask;
|
|
|
-}
|
|
|
-
|
|
|
-void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *mask)
|
|
|
-{
|
|
|
- mask->ref_count++;
|
|
|
-}
|
|
|
-
|
|
|
-void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred)
|
|
|
-{
|
|
|
- if (!mask)
|
|
|
- return;
|
|
|
-
|
|
|
- BUG_ON(!mask->ref_count);
|
|
|
- mask->ref_count--;
|
|
|
-
|
|
|
- if (!mask->ref_count) {
|
|
|
- list_del_rcu(&mask->list);
|
|
|
- if (deferred)
|
|
|
- kfree_rcu(mask, rcu);
|
|
|
- else
|
|
|
- kfree(mask);
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-static bool ovs_sw_flow_mask_equal(const struct sw_flow_mask *a,
|
|
|
- const struct sw_flow_mask *b)
|
|
|
-{
|
|
|
- u8 *a_ = (u8 *)&a->key + a->range.start;
|
|
|
- u8 *b_ = (u8 *)&b->key + b->range.start;
|
|
|
-
|
|
|
- return (a->range.end == b->range.end)
|
|
|
- && (a->range.start == b->range.start)
|
|
|
- && (memcmp(a_, b_, range_n_bytes(&a->range)) == 0);
|
|
|
-}
|
|
|
-
|
|
|
-struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *tbl,
|
|
|
- const struct sw_flow_mask *mask)
|
|
|
-{
|
|
|
- struct list_head *ml;
|
|
|
-
|
|
|
- list_for_each(ml, tbl->mask_list) {
|
|
|
- struct sw_flow_mask *m;
|
|
|
- m = container_of(ml, struct sw_flow_mask, list);
|
|
|
- if (ovs_sw_flow_mask_equal(mask, m))
|
|
|
- return m;
|
|
|
- }
|
|
|
-
|
|
|
- return NULL;
|
|
|
-}
|
|
|
-
|
|
|
-/**
|
|
|
- * add a new mask into the mask list.
|
|
|
- * The caller needs to make sure that 'mask' is not the same
|
|
|
- * as any masks that are already on the list.
|
|
|
- */
|
|
|
-void ovs_sw_flow_mask_insert(struct flow_table *tbl, struct sw_flow_mask *mask)
|
|
|
-{
|
|
|
- list_add_rcu(&mask->list, tbl->mask_list);
|
|
|
-}
|
|
|
-
|
|
|
-/**
|
|
|
- * Set 'range' fields in the mask to the value of 'val'.
|
|
|
- */
|
|
|
-static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask,
|
|
|
- struct sw_flow_key_range *range, u8 val)
|
|
|
-{
|
|
|
- u8 *m = (u8 *)&mask->key + range->start;
|
|
|
-
|
|
|
- mask->range = *range;
|
|
|
- memset(m, val, range_n_bytes(range));
|
|
|
-}
|
Pravin B Shelar