/*
- * Copyright (c) 2007-2014 Nicira, Inc.
+ * Copyright (c) 2007-2017 Nicira, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/openvswitch.h>
+#include <linux/netfilter_ipv6.h>
#include <linux/sctp.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/in6.h>
#include <linux/if_arp.h>
#include <linux/if_vlan.h>
+
+#include <net/dst.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/checksum.h>
#include <net/dsfield.h>
+#include <net/mpls.h>
#include <net/sctp/checksum.h>
#include "datapath.h"
+#include "conntrack.h"
#include "gso.h"
-#include "mpls.h"
-#include "vlan.h"
#include "vport.h"
+#include "flow_netlink.h"
-static void flow_key_clone(struct sk_buff *skb, struct sw_flow_key *new_key)
-{
- *new_key = *OVS_CB(skb)->pkt_key;
- OVS_CB(skb)->pkt_key = new_key;
-}
+static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
+ struct sw_flow_key *key,
+ const struct nlattr *attr, int len);
-static void flow_key_set_recirc_id(struct sk_buff *skb, u32 recirc_id)
-{
- OVS_CB(skb)->pkt_key->recirc_id = recirc_id;
-}
+struct deferred_action {
+ struct sk_buff *skb;
+ const struct nlattr *actions;
+ int actions_len;
-static void flow_key_set_priority(struct sk_buff *skb, u32 priority)
-{
- OVS_CB(skb)->pkt_key->phy.priority = priority;
-}
+ /* Store pkt_key clone when creating deferred action. */
+ struct sw_flow_key pkt_key;
+};
-static void flow_key_set_skb_mark(struct sk_buff *skb, u32 skb_mark)
-{
- OVS_CB(skb)->pkt_key->phy.skb_mark = skb_mark;
-}
+#define MAX_L2_LEN (VLAN_ETH_HLEN + 3 * MPLS_HLEN)
+struct ovs_frag_data {
+ unsigned long dst;
+ struct vport *vport;
+ struct ovs_gso_cb cb;
+ __be16 inner_protocol;
+ u16 network_offset; /* valid only for MPLS */
+ u16 vlan_tci;
+ __be16 vlan_proto;
+ unsigned int l2_len;
+ u8 mac_proto;
+ u8 l2_data[MAX_L2_LEN];
+};
-static void flow_key_set_eth_src(struct sk_buff *skb, const u8 addr[])
-{
- ether_addr_copy(OVS_CB(skb)->pkt_key->eth.src, addr);
-}
+static DEFINE_PER_CPU(struct ovs_frag_data, ovs_frag_data_storage);
-static void flow_key_set_eth_dst(struct sk_buff *skb, const u8 addr[])
-{
- ether_addr_copy(OVS_CB(skb)->pkt_key->eth.dst, addr);
-}
+#define DEFERRED_ACTION_FIFO_SIZE 10
+#define OVS_RECURSION_LIMIT 4
+#define OVS_DEFERRED_ACTION_THRESHOLD (OVS_RECURSION_LIMIT - 2)
+struct action_fifo {
+ int head;
+ int tail;
+ /* Deferred action fifo queue storage. */
+ struct deferred_action fifo[DEFERRED_ACTION_FIFO_SIZE];
+};
-static void flow_key_set_vlan_tci(struct sk_buff *skb, __be16 tci)
-{
- OVS_CB(skb)->pkt_key->eth.tci = tci;
-}
+struct action_flow_keys {
+ struct sw_flow_key key[OVS_DEFERRED_ACTION_THRESHOLD];
+};
-static void flow_key_set_mpls_top_lse(struct sk_buff *skb, __be32 top_lse)
-{
- OVS_CB(skb)->pkt_key->mpls.top_lse = top_lse;
-}
+static struct action_fifo __percpu *action_fifos;
+static struct action_flow_keys __percpu *flow_keys;
+static DEFINE_PER_CPU(int, exec_actions_level);
-static void flow_key_set_ipv4_src(struct sk_buff *skb, __be32 addr)
+/* Make a clone of the 'key', using the pre-allocated percpu 'flow_keys'
+ * space. Return NULL if out of key spaces.
+ */
+static struct sw_flow_key *clone_key(const struct sw_flow_key *key_)
{
- OVS_CB(skb)->pkt_key->ipv4.addr.src = addr;
-}
+ struct action_flow_keys *keys = this_cpu_ptr(flow_keys);
+ int level = this_cpu_read(exec_actions_level);
+ struct sw_flow_key *key = NULL;
-static void flow_key_set_ipv4_dst(struct sk_buff *skb, __be32 addr)
-{
- OVS_CB(skb)->pkt_key->ipv4.addr.src = addr;
-}
+ if (level <= OVS_DEFERRED_ACTION_THRESHOLD) {
+ key = &keys->key[level - 1];
+ *key = *key_;
+ }
-static void flow_key_set_ip_tos(struct sk_buff *skb, u8 tos)
-{
- OVS_CB(skb)->pkt_key->ip.tos = tos;
+ return key;
}
-static void flow_key_set_ip_ttl(struct sk_buff *skb, u8 ttl)
+static void action_fifo_init(struct action_fifo *fifo)
{
- OVS_CB(skb)->pkt_key->ip.ttl = ttl;
+ fifo->head = 0;
+ fifo->tail = 0;
}
-static void flow_key_set_ipv6_src(struct sk_buff *skb,
- const __be32 addr[4])
+static bool action_fifo_is_empty(const struct action_fifo *fifo)
{
- memcpy(&OVS_CB(skb)->pkt_key->ipv6.addr.src, addr, sizeof(__be32[4]));
+ return (fifo->head == fifo->tail);
}
-static void flow_key_set_ipv6_dst(struct sk_buff *skb,
- const __be32 addr[4])
+static struct deferred_action *action_fifo_get(struct action_fifo *fifo)
{
- memcpy(&OVS_CB(skb)->pkt_key->ipv6.addr.dst, addr, sizeof(__be32[4]));
-}
+ if (action_fifo_is_empty(fifo))
+ return NULL;
-static void flow_key_set_ipv6_fl(struct sk_buff *skb,
- const struct ipv6hdr *nh)
-{
- OVS_CB(skb)->pkt_key->ipv6.label = *(__be32 *)nh &
- htonl(IPV6_FLOWINFO_FLOWLABEL);
+ return &fifo->fifo[fifo->tail++];
}
-static void flow_key_set_tp_src(struct sk_buff *skb, __be16 port)
+static struct deferred_action *action_fifo_put(struct action_fifo *fifo)
{
- OVS_CB(skb)->pkt_key->tp.src = port;
+ if (fifo->head >= DEFERRED_ACTION_FIFO_SIZE - 1)
+ return NULL;
+
+ return &fifo->fifo[fifo->head++];
}
-static void flow_key_set_tp_dst(struct sk_buff *skb, __be16 port)
+/* Return queue entry if fifo is not full */
+static struct deferred_action *add_deferred_actions(struct sk_buff *skb,
+ const struct sw_flow_key *key,
+ const struct nlattr *actions,
+ const int actions_len)
{
- OVS_CB(skb)->pkt_key->tp.dst = port;
+ struct action_fifo *fifo;
+ struct deferred_action *da;
+
+ fifo = this_cpu_ptr(action_fifos);
+ da = action_fifo_put(fifo);
+ if (da) {
+ da->skb = skb;
+ da->actions = actions;
+ da->actions_len = actions_len;
+ da->pkt_key = *key;
+ }
+
+ return da;
}
-static void invalidate_skb_flow_key(struct sk_buff *skb)
+static void invalidate_flow_key(struct sw_flow_key *key)
{
- OVS_CB(skb)->pkt_key->eth.type = htons(0);
+ key->mac_proto |= SW_FLOW_KEY_INVALID;
}
-static bool is_skb_flow_key_valid(struct sk_buff *skb)
+static bool is_flow_key_valid(const struct sw_flow_key *key)
{
- return !!OVS_CB(skb)->pkt_key->eth.type;
+ return !(key->mac_proto & SW_FLOW_KEY_INVALID);
}
-static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
- const struct nlattr *attr, int len);
+static int clone_execute(struct datapath *dp, struct sk_buff *skb,
+ struct sw_flow_key *key,
+ u32 recirc_id,
+ const struct nlattr *actions, int len,
+ bool last, bool clone_flow_key);
-static int make_writable(struct sk_buff *skb, int write_len)
+static void update_ethertype(struct sk_buff *skb, struct ethhdr *hdr,
+ __be16 ethertype)
{
- if (!skb_cloned(skb) || skb_clone_writable(skb, write_len))
- return 0;
+ if (skb->ip_summed == CHECKSUM_COMPLETE) {
+ __be16 diff[] = { ~(hdr->h_proto), ethertype };
- return pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
-}
+ skb->csum = csum_partial((char *)diff, sizeof(diff), skb->csum);
+ }
-/* The end of the mac header.
- *
- * For non-MPLS skbs this will correspond to the network header.
- * For MPLS skbs it will be before the network_header as the MPLS
- * label stack lies between the end of the mac header and the network
- * header. That is, for MPLS skbs the end of the mac header
- * is the top of the MPLS label stack.
- */
-static unsigned char *mac_header_end(const struct sk_buff *skb)
-{
- return skb_mac_header(skb) + skb->mac_len;
+ hdr->h_proto = ethertype;
}
-static int push_mpls(struct sk_buff *skb,
+static int push_mpls(struct sk_buff *skb, struct sw_flow_key *key,
const struct ovs_action_push_mpls *mpls)
{
- __be32 *new_mpls_lse;
- struct ethhdr *hdr;
+ struct mpls_shim_hdr *new_mpls_lse;
+
+ /* Networking stack do not allow simultaneous Tunnel and MPLS GSO. */
+ if (skb->encapsulation)
+ return -ENOTSUPP;
if (skb_cow_head(skb, MPLS_HLEN) < 0)
return -ENOMEM;
+ if (!ovs_skb_get_inner_protocol(skb)) {
+ skb_set_inner_network_header(skb, skb->mac_len);
+ ovs_skb_set_inner_protocol(skb, skb->protocol);
+ }
+
skb_push(skb, MPLS_HLEN);
memmove(skb_mac_header(skb) - MPLS_HLEN, skb_mac_header(skb),
skb->mac_len);
skb_reset_mac_header(skb);
+#ifdef MPLS_HEADER_IS_L3
+ skb_set_network_header(skb, skb->mac_len);
+#endif
- new_mpls_lse = (__be32 *)mac_header_end(skb);
- *new_mpls_lse = mpls->mpls_lse;
+ new_mpls_lse = mpls_hdr(skb);
+ new_mpls_lse->label_stack_entry = mpls->mpls_lse;
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->csum = csum_add(skb->csum, csum_partial(new_mpls_lse,
- MPLS_HLEN, 0));
+ skb_postpush_rcsum(skb, new_mpls_lse, MPLS_HLEN);
- hdr = eth_hdr(skb);
- hdr->h_proto = mpls->mpls_ethertype;
- if (!ovs_skb_get_inner_protocol(skb))
- ovs_skb_set_inner_protocol(skb, skb->protocol);
+ if (ovs_key_mac_proto(key) == MAC_PROTO_ETHERNET)
+ update_ethertype(skb, eth_hdr(skb), mpls->mpls_ethertype);
skb->protocol = mpls->mpls_ethertype;
- invalidate_skb_flow_key(skb);
+
+ invalidate_flow_key(key);
return 0;
}
-static int pop_mpls(struct sk_buff *skb, const __be16 ethertype)
+static int pop_mpls(struct sk_buff *skb, struct sw_flow_key *key,
+ const __be16 ethertype)
{
- struct ethhdr *hdr;
int err;
- err = make_writable(skb, skb->mac_len + MPLS_HLEN);
+ err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN);
if (unlikely(err))
return err;
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->csum = csum_sub(skb->csum,
- csum_partial(mac_header_end(skb),
- MPLS_HLEN, 0));
+ skb_postpull_rcsum(skb, mpls_hdr(skb), MPLS_HLEN);
memmove(skb_mac_header(skb) + MPLS_HLEN, skb_mac_header(skb),
skb->mac_len);
__skb_pull(skb, MPLS_HLEN);
skb_reset_mac_header(skb);
+ skb_set_network_header(skb, skb->mac_len);
- /* mac_header_end() is used to locate the ethertype
- * field correctly in the presence of VLAN tags.
- */
- hdr = (struct ethhdr *)(mac_header_end(skb) - ETH_HLEN);
- hdr->h_proto = ethertype;
+ if (ovs_key_mac_proto(key) == MAC_PROTO_ETHERNET) {
+ struct ethhdr *hdr;
+
+ /* mpls_hdr() is used to locate the ethertype
+ * field correctly in the presence of VLAN tags.
+ */
+ hdr = (struct ethhdr *)((void*)mpls_hdr(skb) - ETH_HLEN);
+ update_ethertype(skb, hdr, ethertype);
+ }
if (eth_p_mpls(skb->protocol))
skb->protocol = ethertype;
- invalidate_skb_flow_key(skb);
+
+ invalidate_flow_key(key);
return 0;
}
-static int set_mpls(struct sk_buff *skb, const __be32 *mpls_lse)
+static int set_mpls(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const __be32 *mpls_lse, const __be32 *mask)
{
- __be32 *stack = (__be32 *)mac_header_end(skb);
+ struct mpls_shim_hdr *stack;
+ __be32 lse;
int err;
- err = make_writable(skb, skb->mac_len + MPLS_HLEN);
+ err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN);
if (unlikely(err))
return err;
+ stack = mpls_hdr(skb);
+ lse = OVS_MASKED(stack->label_stack_entry, *mpls_lse, *mask);
if (skb->ip_summed == CHECKSUM_COMPLETE) {
- __be32 diff[] = { ~(*stack), *mpls_lse };
- skb->csum = ~csum_partial((char *)diff, sizeof(diff),
- ~skb->csum);
+ __be32 diff[] = { ~(stack->label_stack_entry), lse };
+
+ skb->csum = csum_partial((char *)diff, sizeof(diff), skb->csum);
}
- *stack = *mpls_lse;
- flow_key_set_mpls_top_lse(skb, *stack);
+ stack->label_stack_entry = lse;
+ flow_key->mpls.lse[0] = lse;
return 0;
}
-/* remove VLAN header from packet and update csum accordingly. */
-static int __pop_vlan_tci(struct sk_buff *skb, __be16 *current_tci)
+static int pop_vlan(struct sk_buff *skb, struct sw_flow_key *key)
{
- struct vlan_hdr *vhdr;
int err;
- err = make_writable(skb, VLAN_ETH_HLEN);
- if (unlikely(err))
- return err;
-
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->csum = csum_sub(skb->csum, csum_partial(skb->data
- + (2 * ETH_ALEN), VLAN_HLEN, 0));
-
- vhdr = (struct vlan_hdr *)(skb->data + ETH_HLEN);
- *current_tci = vhdr->h_vlan_TCI;
+ err = skb_vlan_pop(skb);
+ if (skb_vlan_tag_present(skb)) {
+ invalidate_flow_key(key);
+ } else {
+ key->eth.vlan.tci = 0;
+ key->eth.vlan.tpid = 0;
+ }
+ return err;
+}
- memmove(skb->data + VLAN_HLEN, skb->data, 2 * ETH_ALEN);
- __skb_pull(skb, VLAN_HLEN);
+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)) {
+ invalidate_flow_key(key);
+ } 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_CFI_MASK);
+}
- vlan_set_encap_proto(skb, vhdr);
- skb->mac_header += VLAN_HLEN;
- /* Update mac_len for subsequent MPLS actions */
- skb->mac_len -= VLAN_HLEN;
+/* 'src' is already properly masked. */
+static void ether_addr_copy_masked(u8 *dst_, const u8 *src_, const u8 *mask_)
+{
+ u16 *dst = (u16 *)dst_;
+ const u16 *src = (const u16 *)src_;
+ const u16 *mask = (const u16 *)mask_;
- return 0;
+ OVS_SET_MASKED(dst[0], src[0], mask[0]);
+ OVS_SET_MASKED(dst[1], src[1], mask[1]);
+ OVS_SET_MASKED(dst[2], src[2], mask[2]);
}
-static int pop_vlan(struct sk_buff *skb)
+static int set_eth_addr(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_ethernet *key,
+ const struct ovs_key_ethernet *mask)
{
- __be16 tci;
int err;
- if (likely(vlan_tx_tag_present(skb))) {
- vlan_set_tci(skb, 0);
- } else {
- if (unlikely(skb->protocol != htons(ETH_P_8021Q) ||
- skb->len < VLAN_ETH_HLEN))
- return 0;
-
- err = __pop_vlan_tci(skb, &tci);
- if (err)
- return err;
- }
- /* move next vlan tag to hw accel tag */
- if (likely(skb->protocol != htons(ETH_P_8021Q) ||
- skb->len < VLAN_ETH_HLEN)) {
- flow_key_set_vlan_tci(skb, 0);
- return 0;
- }
-
- invalidate_skb_flow_key(skb);
- err = __pop_vlan_tci(skb, &tci);
+ err = skb_ensure_writable(skb, ETH_HLEN);
if (unlikely(err))
return err;
- __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ntohs(tci));
+ skb_postpull_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
+
+ ether_addr_copy_masked(eth_hdr(skb)->h_source, key->eth_src,
+ mask->eth_src);
+ ether_addr_copy_masked(eth_hdr(skb)->h_dest, key->eth_dst,
+ mask->eth_dst);
+
+ skb_postpush_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
+
+ ether_addr_copy(flow_key->eth.src, eth_hdr(skb)->h_source);
+ ether_addr_copy(flow_key->eth.dst, eth_hdr(skb)->h_dest);
+ return 0;
+}
+
+/* pop_eth does not support VLAN packets as this action is never called
+ * for them.
+ */
+static int pop_eth(struct sk_buff *skb, struct sw_flow_key *key)
+{
+ skb_pull_rcsum(skb, ETH_HLEN);
+ skb_reset_mac_header(skb);
+ skb_reset_mac_len(skb);
+
+ /* safe right before invalidate_flow_key */
+ key->mac_proto = MAC_PROTO_NONE;
+ invalidate_flow_key(key);
return 0;
}
-static int push_vlan(struct sk_buff *skb, const struct ovs_action_push_vlan *vlan)
+static int push_eth(struct sk_buff *skb, struct sw_flow_key *key,
+ const struct ovs_action_push_eth *ethh)
{
- if (unlikely(vlan_tx_tag_present(skb))) {
- u16 current_tag;
+ struct ethhdr *hdr;
- /* push down current VLAN tag */
- current_tag = vlan_tx_tag_get(skb);
+ /* Add the new Ethernet header */
+ if (skb_cow_head(skb, ETH_HLEN) < 0)
+ return -ENOMEM;
- if (!__vlan_put_tag(skb, skb->vlan_proto, current_tag))
- return -ENOMEM;
+ skb_push(skb, ETH_HLEN);
+ skb_reset_mac_header(skb);
+ skb_reset_mac_len(skb);
- /* Update mac_len for subsequent MPLS actions */
- skb->mac_len += VLAN_HLEN;
+ hdr = eth_hdr(skb);
+ ether_addr_copy(hdr->h_source, ethh->addresses.eth_src);
+ ether_addr_copy(hdr->h_dest, ethh->addresses.eth_dst);
+ hdr->h_proto = skb->protocol;
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->csum = csum_add(skb->csum, csum_partial(skb->data
- + (2 * ETH_ALEN), VLAN_HLEN, 0));
+ skb_postpush_rcsum(skb, hdr, ETH_HLEN);
- invalidate_skb_flow_key(skb);
- } else {
- flow_key_set_vlan_tci(skb, vlan->vlan_tci);
- }
- __vlan_hwaccel_put_tag(skb, vlan->vlan_tpid, ntohs(vlan->vlan_tci) & ~VLAN_TAG_PRESENT);
+ /* safe right before invalidate_flow_key */
+ key->mac_proto = MAC_PROTO_ETHERNET;
+ invalidate_flow_key(key);
return 0;
}
-static int set_eth_addr(struct sk_buff *skb,
- const struct ovs_key_ethernet *eth_key)
+static int push_nsh(struct sk_buff *skb, struct sw_flow_key *key,
+ const struct nshhdr *nh)
{
int err;
- err = make_writable(skb, ETH_HLEN);
- if (unlikely(err))
+
+ err = ovs_nsh_push(skb, nh);
+ if (err)
return err;
- skb_postpull_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
+ /* safe right before invalidate_flow_key */
+ key->mac_proto = MAC_PROTO_NONE;
+ invalidate_flow_key(key);
+ return 0;
+}
- ether_addr_copy(eth_hdr(skb)->h_source, eth_key->eth_src);
- ether_addr_copy(eth_hdr(skb)->h_dest, eth_key->eth_dst);
+static int pop_nsh(struct sk_buff *skb, struct sw_flow_key *key)
+{
+ int err;
- ovs_skb_postpush_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2);
+ err = ovs_nsh_pop(skb);
+ if (err)
+ return err;
- flow_key_set_eth_src(skb, eth_key->eth_src);
- flow_key_set_eth_dst(skb, eth_key->eth_dst);
+ /* safe right before invalidate_flow_key */
+ if (skb->protocol == htons(ETH_P_TEB))
+ key->mac_proto = MAC_PROTO_ETHERNET;
+ else
+ key->mac_proto = MAC_PROTO_NONE;
+ invalidate_flow_key(key);
return 0;
}
-static void set_ip_addr(struct sk_buff *skb, struct iphdr *nh,
- __be32 *addr, __be32 new_addr)
+static void update_ip_l4_checksum(struct sk_buff *skb, struct iphdr *nh,
+ __be32 addr, __be32 new_addr)
{
int transport_len = skb->len - skb_transport_offset(skb);
+ if (nh->frag_off & htons(IP_OFFSET))
+ return;
+
if (nh->protocol == IPPROTO_TCP) {
if (likely(transport_len >= sizeof(struct tcphdr)))
inet_proto_csum_replace4(&tcp_hdr(skb)->check, skb,
- *addr, new_addr, 1);
+ addr, new_addr, true);
} else if (nh->protocol == IPPROTO_UDP) {
if (likely(transport_len >= sizeof(struct udphdr))) {
struct udphdr *uh = udp_hdr(skb);
if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) {
inet_proto_csum_replace4(&uh->check, skb,
- *addr, new_addr, 1);
+ addr, new_addr, true);
if (!uh->check)
uh->check = CSUM_MANGLED_0;
}
}
}
+}
+
+static void set_ip_addr(struct sk_buff *skb, struct iphdr *nh,
+ __be32 *addr, __be32 new_addr)
+{
+ update_ip_l4_checksum(skb, nh, *addr, new_addr);
csum_replace4(&nh->check, *addr, new_addr);
skb_clear_hash(skb);
*addr = new_addr;
if (l4_proto == NEXTHDR_TCP) {
if (likely(transport_len >= sizeof(struct tcphdr)))
inet_proto_csum_replace16(&tcp_hdr(skb)->check, skb,
- addr, new_addr, 1);
+ addr, new_addr, true);
} else if (l4_proto == NEXTHDR_UDP) {
if (likely(transport_len >= sizeof(struct udphdr))) {
struct udphdr *uh = udp_hdr(skb);
if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) {
inet_proto_csum_replace16(&uh->check, skb,
- addr, new_addr, 1);
+ addr, new_addr, true);
if (!uh->check)
uh->check = CSUM_MANGLED_0;
}
} else if (l4_proto == NEXTHDR_ICMP) {
if (likely(transport_len >= sizeof(struct icmp6hdr)))
inet_proto_csum_replace16(&icmp6_hdr(skb)->icmp6_cksum,
- skb, addr, new_addr, 1);
+ skb, addr, new_addr, true);
}
}
+static void mask_ipv6_addr(const __be32 old[4], const __be32 addr[4],
+ const __be32 mask[4], __be32 masked[4])
+{
+ masked[0] = OVS_MASKED(old[0], addr[0], mask[0]);
+ masked[1] = OVS_MASKED(old[1], addr[1], mask[1]);
+ masked[2] = OVS_MASKED(old[2], addr[2], mask[2]);
+ masked[3] = OVS_MASKED(old[3], addr[3], mask[3]);
+}
+
static void set_ipv6_addr(struct sk_buff *skb, u8 l4_proto,
__be32 addr[4], const __be32 new_addr[4],
bool recalculate_csum)
memcpy(addr, new_addr, sizeof(__be32[4]));
}
-static void set_ipv6_tc(struct ipv6hdr *nh, u8 tc)
+static void set_ipv6_fl(struct ipv6hdr *nh, u32 fl, u32 mask)
{
- nh->priority = tc >> 4;
- nh->flow_lbl[0] = (nh->flow_lbl[0] & 0x0F) | ((tc & 0x0F) << 4);
+ /* Bits 21-24 are always unmasked, so this retains their values. */
+ OVS_SET_MASKED(nh->flow_lbl[0], (u8)(fl >> 16), (u8)(mask >> 16));
+ OVS_SET_MASKED(nh->flow_lbl[1], (u8)(fl >> 8), (u8)(mask >> 8));
+ OVS_SET_MASKED(nh->flow_lbl[2], (u8)fl, (u8)mask);
}
-static void set_ipv6_fl(struct ipv6hdr *nh, u32 fl)
+static void set_ip_ttl(struct sk_buff *skb, struct iphdr *nh, u8 new_ttl,
+ u8 mask)
{
- nh->flow_lbl[0] = (nh->flow_lbl[0] & 0xF0) | (fl & 0x000F0000) >> 16;
- nh->flow_lbl[1] = (fl & 0x0000FF00) >> 8;
- nh->flow_lbl[2] = fl & 0x000000FF;
-}
+ new_ttl = OVS_MASKED(nh->ttl, new_ttl, mask);
-static void set_ip_ttl(struct sk_buff *skb, struct iphdr *nh, u8 new_ttl)
-{
csum_replace2(&nh->check, htons(nh->ttl << 8), htons(new_ttl << 8));
nh->ttl = new_ttl;
}
-static int set_ipv4(struct sk_buff *skb, const struct ovs_key_ipv4 *ipv4_key)
+static int set_ipv4(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_ipv4 *key,
+ const struct ovs_key_ipv4 *mask)
{
struct iphdr *nh;
+ __be32 new_addr;
int err;
- err = make_writable(skb, skb_network_offset(skb) +
- sizeof(struct iphdr));
+ err = skb_ensure_writable(skb, skb_network_offset(skb) +
+ sizeof(struct iphdr));
if (unlikely(err))
return err;
nh = ip_hdr(skb);
- if (ipv4_key->ipv4_src != nh->saddr) {
- set_ip_addr(skb, nh, &nh->saddr, ipv4_key->ipv4_src);
- flow_key_set_ipv4_src(skb, ipv4_key->ipv4_src);
- }
+ /* Setting an IP addresses is typically only a side effect of
+ * matching on them in the current userspace implementation, so it
+ * makes sense to check if the value actually changed.
+ */
+ if (mask->ipv4_src) {
+ new_addr = OVS_MASKED(nh->saddr, key->ipv4_src, mask->ipv4_src);
- if (ipv4_key->ipv4_dst != nh->daddr) {
- set_ip_addr(skb, nh, &nh->daddr, ipv4_key->ipv4_dst);
- flow_key_set_ipv4_dst(skb, ipv4_key->ipv4_dst);
+ if (unlikely(new_addr != nh->saddr)) {
+ set_ip_addr(skb, nh, &nh->saddr, new_addr);
+ flow_key->ipv4.addr.src = new_addr;
+ }
}
+ if (mask->ipv4_dst) {
+ new_addr = OVS_MASKED(nh->daddr, key->ipv4_dst, mask->ipv4_dst);
- if (ipv4_key->ipv4_tos != nh->tos) {
- ipv4_change_dsfield(nh, 0, ipv4_key->ipv4_tos);
- flow_key_set_ip_tos(skb, nh->tos);
+ if (unlikely(new_addr != nh->daddr)) {
+ set_ip_addr(skb, nh, &nh->daddr, new_addr);
+ flow_key->ipv4.addr.dst = new_addr;
+ }
}
-
- if (ipv4_key->ipv4_ttl != nh->ttl) {
- set_ip_ttl(skb, nh, ipv4_key->ipv4_ttl);
- flow_key_set_ip_ttl(skb, ipv4_key->ipv4_ttl);
+ if (mask->ipv4_tos) {
+ ipv4_change_dsfield(nh, ~mask->ipv4_tos, key->ipv4_tos);
+ flow_key->ip.tos = nh->tos;
+ }
+ if (mask->ipv4_ttl) {
+ set_ip_ttl(skb, nh, key->ipv4_ttl, mask->ipv4_ttl);
+ flow_key->ip.ttl = nh->ttl;
}
return 0;
}
-static int set_ipv6(struct sk_buff *skb, const struct ovs_key_ipv6 *ipv6_key)
+static bool is_ipv6_mask_nonzero(const __be32 addr[4])
+{
+ return !!(addr[0] | addr[1] | addr[2] | addr[3]);
+}
+
+static int set_ipv6(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_ipv6 *key,
+ const struct ovs_key_ipv6 *mask)
{
struct ipv6hdr *nh;
int err;
- __be32 *saddr;
- __be32 *daddr;
- err = make_writable(skb, skb_network_offset(skb) +
- sizeof(struct ipv6hdr));
+ err = skb_ensure_writable(skb, skb_network_offset(skb) +
+ sizeof(struct ipv6hdr));
if (unlikely(err))
return err;
nh = ipv6_hdr(skb);
- saddr = (__be32 *)&nh->saddr;
- daddr = (__be32 *)&nh->daddr;
- if (memcmp(ipv6_key->ipv6_src, saddr, sizeof(ipv6_key->ipv6_src))) {
- set_ipv6_addr(skb, ipv6_key->ipv6_proto, saddr,
- ipv6_key->ipv6_src, true);
- flow_key_set_ipv6_src(skb, ipv6_key->ipv6_src);
- }
+ /* Setting an IP addresses is typically only a side effect of
+ * matching on them in the current userspace implementation, so it
+ * makes sense to check if the value actually changed.
+ */
+ if (is_ipv6_mask_nonzero(mask->ipv6_src)) {
+ __be32 *saddr = (__be32 *)&nh->saddr;
+ __be32 masked[4];
+
+ mask_ipv6_addr(saddr, key->ipv6_src, mask->ipv6_src, masked);
- if (memcmp(ipv6_key->ipv6_dst, daddr, sizeof(ipv6_key->ipv6_dst))) {
+ if (unlikely(memcmp(saddr, masked, sizeof(masked)))) {
+ set_ipv6_addr(skb, flow_key->ip.proto, saddr, masked,
+ true);
+ memcpy(&flow_key->ipv6.addr.src, masked,
+ sizeof(flow_key->ipv6.addr.src));
+ }
+ }
+ if (is_ipv6_mask_nonzero(mask->ipv6_dst)) {
unsigned int offset = 0;
- int flags = OVS_IP6T_FH_F_SKIP_RH;
+ int flags = IP6_FH_F_SKIP_RH;
bool recalc_csum = true;
+ __be32 *daddr = (__be32 *)&nh->daddr;
+ __be32 masked[4];
+
+ mask_ipv6_addr(daddr, key->ipv6_dst, mask->ipv6_dst, masked);
+
+ if (unlikely(memcmp(daddr, masked, sizeof(masked)))) {
+ if (ipv6_ext_hdr(nh->nexthdr))
+ recalc_csum = (ipv6_find_hdr(skb, &offset,
+ NEXTHDR_ROUTING,
+ NULL, &flags)
+ != NEXTHDR_ROUTING);
+
+ set_ipv6_addr(skb, flow_key->ip.proto, daddr, masked,
+ recalc_csum);
+ memcpy(&flow_key->ipv6.addr.dst, masked,
+ sizeof(flow_key->ipv6.addr.dst));
+ }
+ }
+ if (mask->ipv6_tclass) {
+ ipv6_change_dsfield(nh, ~mask->ipv6_tclass, key->ipv6_tclass);
+ flow_key->ip.tos = ipv6_get_dsfield(nh);
+ }
+ if (mask->ipv6_label) {
+ set_ipv6_fl(nh, ntohl(key->ipv6_label),
+ ntohl(mask->ipv6_label));
+ flow_key->ipv6.label =
+ *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
+ }
+ if (mask->ipv6_hlimit) {
+ OVS_SET_MASKED(nh->hop_limit, key->ipv6_hlimit,
+ mask->ipv6_hlimit);
+ flow_key->ip.ttl = nh->hop_limit;
+ }
+ return 0;
+}
- if (ipv6_ext_hdr(nh->nexthdr))
- recalc_csum = ipv6_find_hdr(skb, &offset,
- NEXTHDR_ROUTING, NULL,
- &flags) != NEXTHDR_ROUTING;
+static int set_nsh(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct nlattr *a)
+{
+ struct nshhdr *nh;
+ size_t length;
+ int err;
+ u8 flags;
+ u8 ttl;
+ int i;
- set_ipv6_addr(skb, ipv6_key->ipv6_proto, daddr,
- ipv6_key->ipv6_dst, recalc_csum);
- flow_key_set_ipv6_dst(skb, ipv6_key->ipv6_dst);
- }
+ struct ovs_key_nsh key;
+ struct ovs_key_nsh mask;
+
+ err = nsh_key_from_nlattr(a, &key, &mask);
+ if (err)
+ return err;
- set_ipv6_tc(nh, ipv6_key->ipv6_tclass);
- flow_key_set_ip_tos(skb, ipv6_get_dsfield(nh));
+ /* Make sure the NSH base header is there */
+ if (!pskb_may_pull(skb, skb_network_offset(skb) + NSH_BASE_HDR_LEN))
+ return -ENOMEM;
+
+ nh = nsh_hdr(skb);
+ length = nsh_hdr_len(nh);
- set_ipv6_fl(nh, ntohl(ipv6_key->ipv6_label));
- flow_key_set_ipv6_fl(skb, nh);
+ /* Make sure the whole NSH header is there */
+ err = skb_ensure_writable(skb, skb_network_offset(skb) +
+ length);
+ if (unlikely(err))
+ return err;
- nh->hop_limit = ipv6_key->ipv6_hlimit;
- flow_key_set_ip_ttl(skb, ipv6_key->ipv6_hlimit);
+ nh = nsh_hdr(skb);
+ skb_postpull_rcsum(skb, nh, length);
+ flags = nsh_get_flags(nh);
+ flags = OVS_MASKED(flags, key.base.flags, mask.base.flags);
+ flow_key->nsh.base.flags = flags;
+ ttl = nsh_get_ttl(nh);
+ ttl = OVS_MASKED(ttl, key.base.ttl, mask.base.ttl);
+ flow_key->nsh.base.ttl = ttl;
+ nsh_set_flags_and_ttl(nh, flags, ttl);
+ nh->path_hdr = OVS_MASKED(nh->path_hdr, key.base.path_hdr,
+ mask.base.path_hdr);
+ flow_key->nsh.base.path_hdr = nh->path_hdr;
+ switch (nh->mdtype) {
+ case NSH_M_TYPE1:
+ for (i = 0; i < NSH_MD1_CONTEXT_SIZE; i++) {
+ nh->md1.context[i] =
+ OVS_MASKED(nh->md1.context[i], key.context[i],
+ mask.context[i]);
+ }
+ memcpy(flow_key->nsh.context, nh->md1.context,
+ sizeof(nh->md1.context));
+ break;
+ case NSH_M_TYPE2:
+ memset(flow_key->nsh.context, 0,
+ sizeof(flow_key->nsh.context));
+ break;
+ default:
+ return -EINVAL;
+ }
+ skb_postpush_rcsum(skb, nh, length);
return 0;
}
-/* Must follow make_writable() since that can move the skb data. */
+/* Must follow skb_ensure_writable() since that can move the skb data. */
static void set_tp_port(struct sk_buff *skb, __be16 *port,
- __be16 new_port, __sum16 *check)
+ __be16 new_port, __sum16 *check)
{
- inet_proto_csum_replace2(check, skb, *port, new_port, 0);
+ inet_proto_csum_replace2(check, skb, *port, new_port, false);
*port = new_port;
- skb_clear_hash(skb);
-}
-
-static void set_udp_port(struct sk_buff *skb, __be16 *port, __be16 new_port)
-{
- struct udphdr *uh = udp_hdr(skb);
-
- if (uh->check && skb->ip_summed != CHECKSUM_PARTIAL) {
- set_tp_port(skb, port, new_port, &uh->check);
-
- if (!uh->check)
- uh->check = CSUM_MANGLED_0;
- } else {
- *port = new_port;
- skb_clear_hash(skb);
- }
}
-static int set_udp(struct sk_buff *skb, const struct ovs_key_udp *udp_port_key)
+static int set_udp(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_udp *key,
+ const struct ovs_key_udp *mask)
{
struct udphdr *uh;
+ __be16 src, dst;
int err;
- err = make_writable(skb, skb_transport_offset(skb) +
- sizeof(struct udphdr));
+ err = skb_ensure_writable(skb, skb_transport_offset(skb) +
+ sizeof(struct udphdr));
if (unlikely(err))
return err;
uh = udp_hdr(skb);
- if (udp_port_key->udp_src != uh->source) {
- set_udp_port(skb, &uh->source, udp_port_key->udp_src);
- flow_key_set_tp_src(skb, udp_port_key->udp_src);
- }
+ /* Either of the masks is non-zero, so do not bother checking them. */
+ src = OVS_MASKED(uh->source, key->udp_src, mask->udp_src);
+ dst = OVS_MASKED(uh->dest, key->udp_dst, mask->udp_dst);
+
+ if (uh->check && skb->ip_summed != CHECKSUM_PARTIAL) {
+ if (likely(src != uh->source)) {
+ set_tp_port(skb, &uh->source, src, &uh->check);
+ flow_key->tp.src = src;
+ }
+ if (likely(dst != uh->dest)) {
+ set_tp_port(skb, &uh->dest, dst, &uh->check);
+ flow_key->tp.dst = dst;
+ }
- if (udp_port_key->udp_dst != uh->dest) {
- set_udp_port(skb, &uh->dest, udp_port_key->udp_dst);
- flow_key_set_tp_dst(skb, udp_port_key->udp_dst);
+ if (unlikely(!uh->check))
+ uh->check = CSUM_MANGLED_0;
+ } else {
+ uh->source = src;
+ uh->dest = dst;
+ flow_key->tp.src = src;
+ flow_key->tp.dst = dst;
}
+ skb_clear_hash(skb);
+
return 0;
}
-static int set_tcp(struct sk_buff *skb, const struct ovs_key_tcp *tcp_port_key)
+static int set_tcp(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_tcp *key,
+ const struct ovs_key_tcp *mask)
{
struct tcphdr *th;
+ __be16 src, dst;
int err;
- err = make_writable(skb, skb_transport_offset(skb) +
- sizeof(struct tcphdr));
+ err = skb_ensure_writable(skb, skb_transport_offset(skb) +
+ sizeof(struct tcphdr));
if (unlikely(err))
return err;
th = tcp_hdr(skb);
- if (tcp_port_key->tcp_src != th->source) {
- set_tp_port(skb, &th->source, tcp_port_key->tcp_src, &th->check);
- flow_key_set_tp_src(skb, tcp_port_key->tcp_src);
+ src = OVS_MASKED(th->source, key->tcp_src, mask->tcp_src);
+ if (likely(src != th->source)) {
+ set_tp_port(skb, &th->source, src, &th->check);
+ flow_key->tp.src = src;
}
-
- if (tcp_port_key->tcp_dst != th->dest) {
- set_tp_port(skb, &th->dest, tcp_port_key->tcp_dst, &th->check);
- flow_key_set_tp_dst(skb, tcp_port_key->tcp_dst);
+ dst = OVS_MASKED(th->dest, key->tcp_dst, mask->tcp_dst);
+ if (likely(dst != th->dest)) {
+ set_tp_port(skb, &th->dest, dst, &th->check);
+ flow_key->tp.dst = dst;
}
+ skb_clear_hash(skb);
return 0;
}
-static int set_sctp(struct sk_buff *skb,
- const struct ovs_key_sctp *sctp_port_key)
+static int set_sctp(struct sk_buff *skb, struct sw_flow_key *flow_key,
+ const struct ovs_key_sctp *key,
+ const struct ovs_key_sctp *mask)
{
+ unsigned int sctphoff = skb_transport_offset(skb);
struct sctphdr *sh;
+ __le32 old_correct_csum, new_csum, old_csum;
int err;
- unsigned int sctphoff = skb_transport_offset(skb);
- err = make_writable(skb, sctphoff + sizeof(struct sctphdr));
+ err = skb_ensure_writable(skb, sctphoff + sizeof(struct sctphdr));
if (unlikely(err))
return err;
sh = sctp_hdr(skb);
- if (sctp_port_key->sctp_src != sh->source ||
- sctp_port_key->sctp_dst != sh->dest) {
- __le32 old_correct_csum, new_csum, old_csum;
+ old_csum = sh->checksum;
+ old_correct_csum = sctp_compute_cksum(skb, sctphoff);
- old_csum = sh->checksum;
- old_correct_csum = sctp_compute_cksum(skb, sctphoff);
+ sh->source = OVS_MASKED(sh->source, key->sctp_src, mask->sctp_src);
+ sh->dest = OVS_MASKED(sh->dest, key->sctp_dst, mask->sctp_dst);
- sh->source = sctp_port_key->sctp_src;
- sh->dest = sctp_port_key->sctp_dst;
+ new_csum = sctp_compute_cksum(skb, sctphoff);
- new_csum = sctp_compute_cksum(skb, sctphoff);
+ /* Carry any checksum errors through. */
+ sh->checksum = old_csum ^ old_correct_csum ^ new_csum;
- /* Carry any checksum errors through. */
- sh->checksum = old_csum ^ old_correct_csum ^ new_csum;
+ skb_clear_hash(skb);
+ flow_key->tp.src = sh->source;
+ flow_key->tp.dst = sh->dest;
- skb_clear_hash(skb);
- flow_key_set_tp_src(skb, sctp_port_key->sctp_src);
- flow_key_set_tp_dst(skb, sctp_port_key->sctp_dst);
+ return 0;
+}
+
+static int ovs_vport_output(OVS_VPORT_OUTPUT_PARAMS)
+{
+ struct ovs_frag_data *data = this_cpu_ptr(&ovs_frag_data_storage);
+ struct vport *vport = data->vport;
+
+ if (skb_cow_head(skb, data->l2_len) < 0) {
+ kfree_skb(skb);
+ return -ENOMEM;
+ }
+
+ __skb_dst_copy(skb, data->dst);
+ *OVS_GSO_CB(skb) = data->cb;
+ ovs_skb_set_inner_protocol(skb, data->inner_protocol);
+ if (data->vlan_tci & VLAN_CFI_MASK)
+ __vlan_hwaccel_put_tag(skb, data->vlan_proto, data->vlan_tci & ~VLAN_CFI_MASK);
+ else
+ __vlan_hwaccel_clear_tag(skb);
+
+ /* Reconstruct the MAC header. */
+ skb_push(skb, data->l2_len);
+ memcpy(skb->data, &data->l2_data, data->l2_len);
+ skb_postpush_rcsum(skb, skb->data, data->l2_len);
+ skb_reset_mac_header(skb);
+
+ if (eth_p_mpls(skb->protocol)) {
+ skb->inner_network_header = skb->network_header;
+ skb_set_network_header(skb, data->network_offset);
+ skb_reset_mac_len(skb);
}
+ ovs_vport_send(vport, skb, data->mac_proto);
return 0;
}
-static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port)
+static unsigned int
+ovs_dst_get_mtu(const struct dst_entry *dst)
{
- struct vport *vport = ovs_vport_rcu(dp, out_port);
+ return dst->dev->mtu;
+}
+
+static struct dst_ops ovs_dst_ops = {
+ .family = AF_UNSPEC,
+ .mtu = ovs_dst_get_mtu,
+};
- if (likely(vport))
- ovs_vport_send(vport, skb);
+/* prepare_frag() is called once per (larger-than-MTU) frame; its inverse is
+ * ovs_vport_output(), which is called once per fragmented packet.
+ */
+static void prepare_frag(struct vport *vport, struct sk_buff *skb,
+ u16 orig_network_offset, u8 mac_proto)
+{
+ unsigned int hlen = skb_network_offset(skb);
+ struct ovs_frag_data *data;
+
+ data = this_cpu_ptr(&ovs_frag_data_storage);
+ data->dst = (unsigned long) skb_dst(skb);
+ data->vport = vport;
+ data->cb = *OVS_GSO_CB(skb);
+ data->inner_protocol = ovs_skb_get_inner_protocol(skb);
+ data->network_offset = orig_network_offset;
+ if (skb_vlan_tag_present(skb))
+ data->vlan_tci = skb_vlan_tag_get(skb) | VLAN_CFI_MASK;
else
+ data->vlan_tci = 0;
+ data->vlan_proto = skb->vlan_proto;
+ data->mac_proto = mac_proto;
+ data->l2_len = hlen;
+ memcpy(&data->l2_data, skb->data, hlen);
+
+ memset(IPCB(skb), 0, sizeof(struct inet_skb_parm));
+ skb_pull(skb, hlen);
+}
+
+static void ovs_fragment(struct net *net, struct vport *vport,
+ struct sk_buff *skb, u16 mru,
+ struct sw_flow_key *key)
+{
+ u16 orig_network_offset = 0;
+
+ if (eth_p_mpls(skb->protocol)) {
+ orig_network_offset = skb_network_offset(skb);
+ skb->network_header = skb->inner_network_header;
+ }
+
+ if (skb_network_offset(skb) > MAX_L2_LEN) {
+ OVS_NLERR(1, "L2 header too long to fragment");
+ goto err;
+ }
+
+ if (key->eth.type == htons(ETH_P_IP)) {
+ struct dst_entry ovs_dst;
+ unsigned long orig_dst;
+
+ prepare_frag(vport, skb, orig_network_offset,
+ ovs_key_mac_proto(key));
+ dst_init(&ovs_dst, &ovs_dst_ops, NULL, 1,
+ DST_OBSOLETE_NONE, DST_NOCOUNT);
+ ovs_dst.dev = vport->dev;
+
+ orig_dst = (unsigned long) skb_dst(skb);
+ skb_dst_set_noref(skb, &ovs_dst);
+ IPCB(skb)->frag_max_size = mru;
+
+ ip_do_fragment(net, skb->sk, skb, ovs_vport_output);
+ refdst_drop(orig_dst);
+ } else if (key->eth.type == htons(ETH_P_IPV6)) {
+ const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops();
+ unsigned long orig_dst;
+ struct rt6_info ovs_rt;
+
+ if (!v6ops)
+ goto err;
+
+ prepare_frag(vport, skb, orig_network_offset,
+ ovs_key_mac_proto(key));
+ memset(&ovs_rt, 0, sizeof(ovs_rt));
+ dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL, 1,
+ DST_OBSOLETE_NONE, DST_NOCOUNT);
+ ovs_rt.dst.dev = vport->dev;
+
+ orig_dst = (unsigned long) skb_dst(skb);
+ skb_dst_set_noref(skb, &ovs_rt.dst);
+ IP6CB(skb)->frag_max_size = mru;
+#ifdef HAVE_IP_LOCAL_OUT_TAKES_NET
+ v6ops->fragment(net, skb->sk, skb, ovs_vport_output);
+#else
+ v6ops->fragment(skb->sk, skb, ovs_vport_output);
+#endif
+ refdst_drop(orig_dst);
+ } else {
+ WARN_ONCE(1, "Failed fragment ->%s: eth=%04x, MRU=%d, MTU=%d.",
+ ovs_vport_name(vport), ntohs(key->eth.type), mru,
+ vport->dev->mtu);
+ goto err;
+ }
+
+ return;
+err:
+ kfree_skb(skb);
+}
+
+static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port,
+ struct sw_flow_key *key)
+{
+ struct vport *vport = ovs_vport_rcu(dp, out_port);
+
+ if (likely(vport)) {
+ u16 mru = OVS_CB(skb)->mru;
+ u32 cutlen = OVS_CB(skb)->cutlen;
+
+ if (unlikely(cutlen > 0)) {
+ if (skb->len - cutlen > ovs_mac_header_len(key))
+ pskb_trim(skb, skb->len - cutlen);
+ else
+ pskb_trim(skb, ovs_mac_header_len(key));
+ }
+
+ if (likely(!mru ||
+ (skb->len <= mru + vport->dev->hard_header_len))) {
+ ovs_vport_send(vport, skb, ovs_key_mac_proto(key));
+ } else if (mru <= vport->dev->mtu) {
+ struct net *net = ovs_dp_get_net(dp);
+
+ ovs_fragment(net, vport, skb, mru, key);
+ } else {
+ OVS_NLERR(true, "Cannot fragment IP frames");
+ kfree_skb(skb);
+ }
+ } else {
kfree_skb(skb);
+ }
}
static int output_userspace(struct datapath *dp, struct sk_buff *skb,
- const struct nlattr *attr)
+ struct sw_flow_key *key, const struct nlattr *attr,
+ const struct nlattr *actions, int actions_len,
+ uint32_t cutlen)
{
struct dp_upcall_info upcall;
const struct nlattr *a;
- int rem;
- struct ovs_tunnel_info info;
+ int rem, err;
+ memset(&upcall, 0, sizeof(upcall));
upcall.cmd = OVS_PACKET_CMD_ACTION;
- upcall.userdata = NULL;
- upcall.portid = 0;
- upcall.egress_tun_info = NULL;
+ upcall.mru = OVS_CB(skb)->mru;
+ SKB_INIT_FILL_METADATA_DST(skb);
for (a = nla_data(attr), rem = nla_len(attr); rem > 0;
a = nla_next(a, &rem)) {
switch (nla_type(a)) {
vport = ovs_vport_rcu(dp, nla_get_u32(a));
if (vport) {
- int err;
-
- err = ovs_vport_get_egress_tun_info(vport, skb,
- &info);
+ err = dev_fill_metadata_dst(vport->dev, skb);
if (!err)
- upcall.egress_tun_info = &info;
+ upcall.egress_tun_info = skb_tunnel_info(skb);
}
+
+ break;
+ }
+
+ case OVS_USERSPACE_ATTR_ACTIONS: {
+ /* Include actions. */
+ upcall.actions = actions;
+ upcall.actions_len = actions_len;
break;
}
} /* End of switch. */
}
- return ovs_dp_upcall(dp, skb, &upcall);
-}
-
-static bool last_action(const struct nlattr *a, int rem)
-{
- return a->nla_len == rem;
+ err = ovs_dp_upcall(dp, skb, key, &upcall, cutlen);
+ SKB_RESTORE_FILL_METADATA_DST(skb);
+ return err;
}
+/* When 'last' is true, sample() should always consume the 'skb'.
+ * Otherwise, sample() should keep 'skb' intact regardless what
+ * actions are executed within sample().
+ */
static int sample(struct datapath *dp, struct sk_buff *skb,
- const struct nlattr *attr)
+ struct sw_flow_key *key, const struct nlattr *attr,
+ bool last)
{
- struct sw_flow_key sample_key;
- const struct nlattr *acts_list = NULL;
- const struct nlattr *a;
- int rem;
-
- for (a = nla_data(attr), rem = nla_len(attr); rem > 0;
- a = nla_next(a, &rem)) {
- switch (nla_type(a)) {
- case OVS_SAMPLE_ATTR_PROBABILITY:
- if (prandom_u32() >= nla_get_u32(a))
- return 0;
- break;
-
- case OVS_SAMPLE_ATTR_ACTIONS:
- acts_list = a;
- break;
- }
- }
-
- rem = nla_len(acts_list);
- a = nla_data(acts_list);
-
- /* Actions list is empty, do nothing */
- if (unlikely(!rem))
- return 0;
-
- /* The only known usage of sample action is having a single user-space
- * action. Treat this usage as a special case.
- * The output_userspace() should clone the skb to be sent to the
- * user space. This skb will be consumed by its caller. */
- if (likely(nla_type(a) == OVS_ACTION_ATTR_USERSPACE &&
- last_action(a, rem)))
- return output_userspace(dp, skb, a);
-
- skb = skb_clone(skb, GFP_ATOMIC);
- if (!skb)
- /* Skip the sample action when out of memory. */
+ struct nlattr *actions;
+ struct nlattr *sample_arg;
+ int rem = nla_len(attr);
+ const struct sample_arg *arg;
+ bool clone_flow_key;
+
+ /* The first action is always 'OVS_SAMPLE_ATTR_ARG'. */
+ sample_arg = nla_data(attr);
+ arg = nla_data(sample_arg);
+ actions = nla_next(sample_arg, &rem);
+
+ if ((arg->probability != U32_MAX) &&
+ (!arg->probability || prandom_u32() > arg->probability)) {
+ if (last)
+ consume_skb(skb);
return 0;
+ }
- flow_key_clone(skb, &sample_key);
+ clone_flow_key = !arg->exec;
+ return clone_execute(dp, skb, key, 0, actions, rem, last,
+ clone_flow_key);
+}
- /* do_execute_actions() will consume the cloned skb. */
- return do_execute_actions(dp, skb, a, rem);
+/* When 'last' is true, clone() should always consume the 'skb'.
+ * Otherwise, clone() should keep 'skb' intact regardless what
+ * actions are executed within clone().
+ */
+static int clone(struct datapath *dp, struct sk_buff *skb,
+ struct sw_flow_key *key, const struct nlattr *attr,
+ bool last)
+{
+ struct nlattr *actions;
+ struct nlattr *clone_arg;
+ int rem = nla_len(attr);
+ bool dont_clone_flow_key;
+
+ /* The first action is always 'OVS_CLONE_ATTR_ARG'. */
+ clone_arg = nla_data(attr);
+ dont_clone_flow_key = nla_get_u32(clone_arg);
+ actions = nla_next(clone_arg, &rem);
+
+ return clone_execute(dp, skb, key, 0, actions, rem, last,
+ !dont_clone_flow_key);
}
-static void execute_hash(struct sk_buff *skb, const struct nlattr *attr)
+static void execute_hash(struct sk_buff *skb, struct sw_flow_key *key,
+ const struct nlattr *attr)
{
- struct sw_flow_key *key = OVS_CB(skb)->pkt_key;
struct ovs_action_hash *hash_act = nla_data(attr);
u32 hash = 0;
}
static int execute_set_action(struct sk_buff *skb,
- const struct nlattr *nested_attr)
+ struct sw_flow_key *flow_key,
+ const struct nlattr *a)
+{
+ /* Only tunnel set execution is supported without a mask. */
+ if (nla_type(a) == OVS_KEY_ATTR_TUNNEL_INFO) {
+ struct ovs_tunnel_info *tun = nla_data(a);
+
+ ovs_skb_dst_drop(skb);
+ ovs_dst_hold((struct dst_entry *)tun->tun_dst);
+ ovs_skb_dst_set(skb, (struct dst_entry *)tun->tun_dst);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+/* Mask is at the midpoint of the data. */
+#define get_mask(a, type) ((const type)nla_data(a) + 1)
+
+static int execute_masked_set_action(struct sk_buff *skb,
+ struct sw_flow_key *flow_key,
+ const struct nlattr *a)
{
int err = 0;
- switch (nla_type(nested_attr)) {
+ switch (nla_type(a)) {
case OVS_KEY_ATTR_PRIORITY:
- skb->priority = nla_get_u32(nested_attr);
- flow_key_set_priority(skb, skb->priority);
+ OVS_SET_MASKED(skb->priority, nla_get_u32(a),
+ *get_mask(a, u32 *));
+ flow_key->phy.priority = skb->priority;
break;
case OVS_KEY_ATTR_SKB_MARK:
- skb->mark = nla_get_u32(nested_attr);
- flow_key_set_skb_mark(skb, skb->mark);
+ OVS_SET_MASKED(skb->mark, nla_get_u32(a), *get_mask(a, u32 *));
+ flow_key->phy.skb_mark = skb->mark;
break;
case OVS_KEY_ATTR_TUNNEL_INFO:
- OVS_CB(skb)->egress_tun_info = nla_data(nested_attr);
+ /* Masked data not supported for tunnel. */
+ err = -EINVAL;
break;
case OVS_KEY_ATTR_ETHERNET:
- err = set_eth_addr(skb, nla_data(nested_attr));
+ err = set_eth_addr(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_ethernet *));
+ break;
+
+ case OVS_KEY_ATTR_NSH:
+ err = set_nsh(skb, flow_key, a);
break;
case OVS_KEY_ATTR_IPV4:
- err = set_ipv4(skb, nla_data(nested_attr));
+ err = set_ipv4(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_ipv4 *));
break;
case OVS_KEY_ATTR_IPV6:
- err = set_ipv6(skb, nla_data(nested_attr));
+ err = set_ipv6(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_ipv6 *));
break;
case OVS_KEY_ATTR_TCP:
- err = set_tcp(skb, nla_data(nested_attr));
+ err = set_tcp(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_tcp *));
break;
case OVS_KEY_ATTR_UDP:
- err = set_udp(skb, nla_data(nested_attr));
+ err = set_udp(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_udp *));
break;
case OVS_KEY_ATTR_SCTP:
- err = set_sctp(skb, nla_data(nested_attr));
+ err = set_sctp(skb, flow_key, nla_data(a),
+ get_mask(a, struct ovs_key_sctp *));
break;
case OVS_KEY_ATTR_MPLS:
- err = set_mpls(skb, nla_data(nested_attr));
+ err = set_mpls(skb, flow_key, nla_data(a), get_mask(a,
+ __be32 *));
+ break;
+
+ case OVS_KEY_ATTR_CT_STATE:
+ case OVS_KEY_ATTR_CT_ZONE:
+ case OVS_KEY_ATTR_CT_MARK:
+ case OVS_KEY_ATTR_CT_LABELS:
+ case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4:
+ case OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6:
+ err = -EINVAL;
break;
}
return err;
}
-
static int execute_recirc(struct datapath *dp, struct sk_buff *skb,
- const struct nlattr *a, int rem)
+ struct sw_flow_key *key,
+ const struct nlattr *a, bool last)
{
- struct sw_flow_key recirc_key;
+ u32 recirc_id;
- if (!is_skb_flow_key_valid(skb)) {
+ if (!is_flow_key_valid(key)) {
int err;
- err = ovs_flow_key_update(skb, OVS_CB(skb)->pkt_key);
+ err = ovs_flow_key_update(skb, key);
if (err)
return err;
-
}
- BUG_ON(!is_skb_flow_key_valid(skb));
+ BUG_ON(!is_flow_key_valid(key));
- if (!last_action(a, rem)) {
- /* Recirc action is the not the last action
- * of the action list. */
- skb = skb_clone(skb, GFP_ATOMIC);
+ recirc_id = nla_get_u32(a);
+ return clone_execute(dp, skb, key, recirc_id, NULL, 0, last, true);
+}
- /* Skip the recirc action when out of memory, but
- * continue on with the rest of the action list. */
- if (!skb)
- return 0;
+static int execute_check_pkt_len(struct datapath *dp, struct sk_buff *skb,
+ struct sw_flow_key *key,
+ const struct nlattr *attr, bool last)
+{
+ const struct nlattr *actions, *cpl_arg;
+ const struct check_pkt_len_arg *arg;
+ int rem = nla_len(attr);
+ bool clone_flow_key;
- flow_key_clone(skb, &recirc_key);
+ /* The first netlink attribute in 'attr' is always
+ * 'OVS_CHECK_PKT_LEN_ATTR_ARG'.
+ */
+ cpl_arg = nla_data(attr);
+ arg = nla_data(cpl_arg);
+
+ if (skb->len <= arg->pkt_len) {
+ /* Second netlink attribute in 'attr' is always
+ * 'OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_LESS_EQUAL'.
+ */
+ actions = nla_next(cpl_arg, &rem);
+ clone_flow_key = !arg->exec_for_lesser_equal;
+ } else {
+ /* Third netlink attribute in 'attr' is always
+ * 'OVS_CHECK_PKT_LEN_ATTR_ACTIONS_IF_GREATER'.
+ */
+ actions = nla_next(cpl_arg, &rem);
+ actions = nla_next(actions, &rem);
+ clone_flow_key = !arg->exec_for_greater;
}
- flow_key_set_recirc_id(skb, nla_get_u32(a));
- ovs_dp_process_packet(skb, true);
- return 0;
+ return clone_execute(dp, skb, key, 0, nla_data(actions),
+ nla_len(actions), last, clone_flow_key);
}
/* Execute a list of actions against 'skb'. */
static int do_execute_actions(struct datapath *dp, struct sk_buff *skb,
- const struct nlattr *attr, int len)
+ struct sw_flow_key *key,
+ const struct nlattr *attr, int len)
{
- /* Every output action needs a separate clone of 'skb', but the common
- * case is just a single output action, so that doing a clone and
- * then freeing the original skbuff is wasteful. So the following code
- * is slightly obscure just to avoid that. */
- int prev_port = -1;
const struct nlattr *a;
int rem;
a = nla_next(a, &rem)) {
int err = 0;
- if (unlikely(prev_port != -1)) {
- struct sk_buff *out_skb = skb_clone(skb, GFP_ATOMIC);
-
- if (out_skb)
- do_output(dp, out_skb, prev_port);
+ switch (nla_type(a)) {
+ case OVS_ACTION_ATTR_OUTPUT: {
+ int port = nla_get_u32(a);
+ struct sk_buff *clone;
+
+ /* Every output action needs a separate clone
+ * of 'skb', In case the output action is the
+ * last action, cloning can be avoided.
+ */
+ if (nla_is_last(a, rem)) {
+ do_output(dp, skb, port, key);
+ /* 'skb' has been used for output.
+ */
+ return 0;
+ }
- prev_port = -1;
+ clone = skb_clone(skb, GFP_ATOMIC);
+ if (clone)
+ do_output(dp, clone, port, key);
+ OVS_CB(skb)->cutlen = 0;
+ break;
}
- switch (nla_type(a)) {
- case OVS_ACTION_ATTR_OUTPUT:
- prev_port = nla_get_u32(a);
+ case OVS_ACTION_ATTR_TRUNC: {
+ struct ovs_action_trunc *trunc = nla_data(a);
+
+ if (skb->len > trunc->max_len)
+ OVS_CB(skb)->cutlen = skb->len - trunc->max_len;
break;
+ }
case OVS_ACTION_ATTR_USERSPACE:
- output_userspace(dp, skb, a);
+ output_userspace(dp, skb, key, a, attr,
+ len, OVS_CB(skb)->cutlen);
+ OVS_CB(skb)->cutlen = 0;
break;
case OVS_ACTION_ATTR_HASH:
- execute_hash(skb, a);
+ execute_hash(skb, key, a);
break;
case OVS_ACTION_ATTR_PUSH_MPLS:
- err = push_mpls(skb, nla_data(a));
+ err = push_mpls(skb, key, nla_data(a));
break;
case OVS_ACTION_ATTR_POP_MPLS:
- err = pop_mpls(skb, nla_get_be16(a));
+ err = pop_mpls(skb, key, nla_get_be16(a));
break;
case OVS_ACTION_ATTR_PUSH_VLAN:
- err = push_vlan(skb, nla_data(a));
- if (unlikely(err)) /* skb already freed. */
- return err;
+ err = push_vlan(skb, key, nla_data(a));
break;
case OVS_ACTION_ATTR_POP_VLAN:
- err = pop_vlan(skb);
+ err = pop_vlan(skb, key);
break;
- case OVS_ACTION_ATTR_RECIRC:
- err = execute_recirc(dp, skb, a, rem);
- if (last_action(a, rem)) {
+ case OVS_ACTION_ATTR_RECIRC: {
+ bool last = nla_is_last(a, rem);
+
+ err = execute_recirc(dp, skb, key, a, last);
+ if (last) {
/* If this is the last action, the skb has
* been consumed or freed.
- * Return immediately. */
+ * Return immediately.
+ */
return err;
}
break;
+ }
case OVS_ACTION_ATTR_SET:
- err = execute_set_action(skb, nla_data(a));
+ err = execute_set_action(skb, key, nla_data(a));
+ break;
+
+ case OVS_ACTION_ATTR_SET_MASKED:
+ case OVS_ACTION_ATTR_SET_TO_MASKED:
+ err = execute_masked_set_action(skb, key, nla_data(a));
+ break;
+
+ case OVS_ACTION_ATTR_SAMPLE: {
+ bool last = nla_is_last(a, rem);
+
+ err = sample(dp, skb, key, a, last);
+ if (last)
+ return err;
+
+ break;
+ }
+
+ case OVS_ACTION_ATTR_CT:
+ if (!is_flow_key_valid(key)) {
+ err = ovs_flow_key_update(skb, key);
+ if (err)
+ return err;
+ }
+
+ err = ovs_ct_execute(ovs_dp_get_net(dp), skb, key,
+ nla_data(a));
+
+ /* Hide stolen IP fragments from user space. */
+ if (err)
+ return err == -EINPROGRESS ? 0 : err;
+ break;
+
+ case OVS_ACTION_ATTR_CT_CLEAR:
+ err = ovs_ct_clear(skb, key);
+ break;
+
+ case OVS_ACTION_ATTR_PUSH_ETH:
+ err = push_eth(skb, key, nla_data(a));
+ break;
+
+ case OVS_ACTION_ATTR_POP_ETH:
+ err = pop_eth(skb, key);
break;
- case OVS_ACTION_ATTR_SAMPLE:
- err = sample(dp, skb, a);
+ case OVS_ACTION_ATTR_PUSH_NSH: {
+ u8 buffer[NSH_HDR_MAX_LEN];
+ struct nshhdr *nh = (struct nshhdr *)buffer;
+
+ err = nsh_hdr_from_nlattr(nla_data(a), nh,
+ NSH_HDR_MAX_LEN);
+ if (unlikely(err))
+ break;
+ err = push_nsh(skb, key, nh);
+ break;
+ }
+
+ case OVS_ACTION_ATTR_POP_NSH:
+ err = pop_nsh(skb, key);
+ break;
+
+ case OVS_ACTION_ATTR_METER:
+ if (ovs_meter_execute(dp, skb, key, nla_get_u32(a))) {
+ consume_skb(skb);
+ return 0;
+ }
+ break;
+
+ case OVS_ACTION_ATTR_CLONE: {
+ bool last = nla_is_last(a, rem);
+
+ err = clone(dp, skb, key, a, last);
+ if (last)
+ return err;
break;
}
+ case OVS_ACTION_ATTR_CHECK_PKT_LEN: {
+ bool last = nla_is_last(a, rem);
+
+ err = execute_check_pkt_len(dp, skb, key, a, last);
+ if (last)
+ return err;
+
+ break;
+ }
+ }
+
if (unlikely(err)) {
kfree_skb(skb);
return err;
}
}
- if (prev_port != -1)
- do_output(dp, skb, prev_port);
- else
- consume_skb(skb);
-
+ consume_skb(skb);
return 0;
}
-/* We limit the number of times that we pass into execute_actions()
- * to avoid blowing out the stack in the event that we have a loop.
+/* Execute the actions on the clone of the packet. The effect of the
+ * execution does not affect the original 'skb' nor the original 'key'.
*
- * Each loop adds some (estimated) cost to the kernel stack.
- * The loop terminates when the max cost is exceeded.
- * */
-#define RECIRC_STACK_COST 1
-#define DEFAULT_STACK_COST 4
-/* Allow up to 4 regular services, and up to 3 recirculations */
-#define MAX_STACK_COST (DEFAULT_STACK_COST * 4 + RECIRC_STACK_COST * 3)
-
-struct loop_counter {
- u8 stack_cost; /* loop stack cost. */
- bool looping; /* Loop detected? */
-};
+ * The execution may be deferred in case the actions can not be executed
+ * immediately.
+ */
+static int clone_execute(struct datapath *dp, struct sk_buff *skb,
+ struct sw_flow_key *key, u32 recirc_id,
+ const struct nlattr *actions, int len,
+ bool last, bool clone_flow_key)
+{
+ struct deferred_action *da;
+ struct sw_flow_key *clone;
+
+ skb = last ? skb : skb_clone(skb, GFP_ATOMIC);
+ if (!skb) {
+ /* Out of memory, skip this action.
+ */
+ return 0;
+ }
+
+ /* When clone_flow_key is false, the 'key' will not be change
+ * by the actions, then the 'key' can be used directly.
+ * Otherwise, try to clone key from the next recursion level of
+ * 'flow_keys'. If clone is successful, execute the actions
+ * without deferring.
+ */
+ clone = clone_flow_key ? clone_key(key) : key;
+ if (clone) {
+ int err = 0;
+
+ if (actions) { /* Sample action */
+ if (clone_flow_key)
+ __this_cpu_inc(exec_actions_level);
+
+ err = do_execute_actions(dp, skb, clone,
+ actions, len);
+
+ if (clone_flow_key)
+ __this_cpu_dec(exec_actions_level);
+ } else { /* Recirc action */
+ clone->recirc_id = recirc_id;
+ ovs_dp_process_packet(skb, clone);
+ }
+ return err;
+ }
+
+ /* Out of 'flow_keys' space. Defer actions */
+ da = add_deferred_actions(skb, key, actions, len);
+ if (da) {
+ if (!actions) { /* Recirc action */
+ key = &da->pkt_key;
+ key->recirc_id = recirc_id;
+ }
+ } else {
+ /* Out of per CPU action FIFO space. Drop the 'skb' and
+ * log an error.
+ */
+ kfree_skb(skb);
-static DEFINE_PER_CPU(struct loop_counter, loop_counters);
+ if (net_ratelimit()) {
+ if (actions) { /* Sample action */
+ pr_warn("%s: deferred action limit reached, drop sample action\n",
+ ovs_dp_name(dp));
+ } else { /* Recirc action */
+ pr_warn("%s: deferred action limit reached, drop recirc action\n",
+ ovs_dp_name(dp));
+ }
+ }
+ }
+ return 0;
+}
-static int loop_suppress(struct datapath *dp, struct sw_flow_actions *actions)
+static void process_deferred_actions(struct datapath *dp)
{
- if (net_ratelimit())
- pr_warn("%s: flow loop detected, dropping\n",
- ovs_dp_name(dp));
- actions->actions_len = 0;
- return -ELOOP;
+ struct action_fifo *fifo = this_cpu_ptr(action_fifos);
+
+ /* Do not touch the FIFO in case there is no deferred actions. */
+ if (action_fifo_is_empty(fifo))
+ return;
+
+ /* Finishing executing all deferred actions. */
+ do {
+ struct deferred_action *da = action_fifo_get(fifo);
+ struct sk_buff *skb = da->skb;
+ struct sw_flow_key *key = &da->pkt_key;
+ const struct nlattr *actions = da->actions;
+ int actions_len = da->actions_len;
+
+ if (actions)
+ do_execute_actions(dp, skb, key, actions, actions_len);
+ else
+ ovs_dp_process_packet(skb, key);
+ } while (!action_fifo_is_empty(fifo));
+
+ /* Reset FIFO for the next packet. */
+ action_fifo_init(fifo);
}
/* Execute a list of actions against 'skb'. */
int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb,
- struct sw_flow_actions *acts, bool recirc)
-{
- const u8 stack_cost = recirc ? RECIRC_STACK_COST : DEFAULT_STACK_COST;
- struct loop_counter *loop;
- int error;
-
- /* Check whether we've looped too much. */
- loop = &__get_cpu_var(loop_counters);
- loop->stack_cost += stack_cost;
- if (unlikely(loop->stack_cost > MAX_STACK_COST))
- loop->looping = true;
- if (unlikely(loop->looping)) {
- error = loop_suppress(dp, acts);
+ const struct sw_flow_actions *acts,
+ struct sw_flow_key *key)
+{
+ int err, level;
+
+ level = __this_cpu_inc_return(exec_actions_level);
+ if (unlikely(level > OVS_RECURSION_LIMIT)) {
+ net_crit_ratelimited("ovs: recursion limit reached on datapath %s, probable configuration error\n",
+ ovs_dp_name(dp));
kfree_skb(skb);
- goto out_loop;
+ err = -ENETDOWN;
+ goto out;
}
- error = do_execute_actions(dp, skb, acts->actions, acts->actions_len);
+ OVS_CB(skb)->acts_origlen = acts->orig_len;
+ err = do_execute_actions(dp, skb, key,
+ acts->actions, acts->actions_len);
+
+ if (level == 1)
+ process_deferred_actions(dp);
- /* Check whether sub-actions looped too much. */
- if (unlikely(loop->looping))
- error = loop_suppress(dp, acts);
+out:
+ __this_cpu_dec(exec_actions_level);
+ return err;
+}
-out_loop:
- /* Decrement loop stack cost. */
- loop->stack_cost -= stack_cost;
- if (!loop->stack_cost)
- loop->looping = false;
+int action_fifos_init(void)
+{
+ action_fifos = alloc_percpu(struct action_fifo);
+ if (!action_fifos)
+ return -ENOMEM;
- return error;
+ flow_keys = alloc_percpu(struct action_flow_keys);
+ if (!flow_keys) {
+ free_percpu(action_fifos);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+void action_fifos_exit(void)
+{
+ free_percpu(action_fifos);
+ free_percpu(flow_keys);
}
projects / mirror_ovs.git / blobdiff