Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1 | /* |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 2 | * Copyright (c) 2007-2014 Nicira, Inc. |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of version 2 of the GNU General Public |
| 6 | * License as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 16 | * 02110-1301, USA |
| 17 | */ |
| 18 | |
| 19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 20 | |
| 21 | #include <linux/skbuff.h> |
| 22 | #include <linux/in.h> |
| 23 | #include <linux/ip.h> |
| 24 | #include <linux/openvswitch.h> |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 25 | #include <linux/netfilter_ipv6.h> |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 26 | #include <linux/sctp.h> |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 27 | #include <linux/tcp.h> |
| 28 | #include <linux/udp.h> |
| 29 | #include <linux/in6.h> |
| 30 | #include <linux/if_arp.h> |
| 31 | #include <linux/if_vlan.h> |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 32 | |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 33 | #include <net/dst.h> |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 34 | #include <net/ip.h> |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 35 | #include <net/ipv6.h> |
Joe Stringer | 7b85b4d | 2015-08-27 15:25:46 -0700 | [diff] [blame] | 36 | #include <net/ip6_fib.h> |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 37 | #include <net/checksum.h> |
| 38 | #include <net/dsfield.h> |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 39 | #include <net/mpls.h> |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 40 | #include <net/sctp/checksum.h> |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 41 | |
| 42 | #include "datapath.h" |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 43 | #include "flow.h" |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 44 | #include "conntrack.h" |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 45 | #include "vport.h" |
| 46 | |
| 47 | static int do_execute_actions(struct datapath *dp, struct sk_buff *skb, |
Pravin B Shelar | 2ff3e4e | 2014-09-15 19:15:28 -0700 | [diff] [blame] | 48 | struct sw_flow_key *key, |
Simon Horman | 651887b | 2014-07-21 15:12:34 -0700 | [diff] [blame] | 49 | const struct nlattr *attr, int len); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 50 | |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 51 | struct deferred_action { |
| 52 | struct sk_buff *skb; |
| 53 | const struct nlattr *actions; |
| 54 | |
| 55 | /* Store pkt_key clone when creating deferred action. */ |
| 56 | struct sw_flow_key pkt_key; |
| 57 | }; |
| 58 | |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 59 | #define MAX_L2_LEN (VLAN_ETH_HLEN + 3 * MPLS_HLEN) |
| 60 | struct ovs_frag_data { |
| 61 | unsigned long dst; |
| 62 | struct vport *vport; |
| 63 | struct ovs_skb_cb cb; |
| 64 | __be16 inner_protocol; |
| 65 | __u16 vlan_tci; |
| 66 | __be16 vlan_proto; |
| 67 | unsigned int l2_len; |
| 68 | u8 l2_data[MAX_L2_LEN]; |
| 69 | }; |
| 70 | |
| 71 | static DEFINE_PER_CPU(struct ovs_frag_data, ovs_frag_data_storage); |
| 72 | |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 73 | #define DEFERRED_ACTION_FIFO_SIZE 10 |
| 74 | struct action_fifo { |
| 75 | int head; |
| 76 | int tail; |
| 77 | /* Deferred action fifo queue storage. */ |
| 78 | struct deferred_action fifo[DEFERRED_ACTION_FIFO_SIZE]; |
| 79 | }; |
| 80 | |
| 81 | static struct action_fifo __percpu *action_fifos; |
| 82 | static DEFINE_PER_CPU(int, exec_actions_level); |
| 83 | |
| 84 | static void action_fifo_init(struct action_fifo *fifo) |
| 85 | { |
| 86 | fifo->head = 0; |
| 87 | fifo->tail = 0; |
| 88 | } |
| 89 | |
Thomas Graf | 12eb18f | 2014-11-06 06:58:52 -0800 | [diff] [blame] | 90 | static bool action_fifo_is_empty(const struct action_fifo *fifo) |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 91 | { |
| 92 | return (fifo->head == fifo->tail); |
| 93 | } |
| 94 | |
| 95 | static struct deferred_action *action_fifo_get(struct action_fifo *fifo) |
| 96 | { |
| 97 | if (action_fifo_is_empty(fifo)) |
| 98 | return NULL; |
| 99 | |
| 100 | return &fifo->fifo[fifo->tail++]; |
| 101 | } |
| 102 | |
| 103 | static struct deferred_action *action_fifo_put(struct action_fifo *fifo) |
| 104 | { |
| 105 | if (fifo->head >= DEFERRED_ACTION_FIFO_SIZE - 1) |
| 106 | return NULL; |
| 107 | |
| 108 | return &fifo->fifo[fifo->head++]; |
| 109 | } |
| 110 | |
| 111 | /* Return true if fifo is not full */ |
| 112 | static struct deferred_action *add_deferred_actions(struct sk_buff *skb, |
Thomas Graf | 12eb18f | 2014-11-06 06:58:52 -0800 | [diff] [blame] | 113 | const struct sw_flow_key *key, |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 114 | const struct nlattr *attr) |
| 115 | { |
| 116 | struct action_fifo *fifo; |
| 117 | struct deferred_action *da; |
| 118 | |
| 119 | fifo = this_cpu_ptr(action_fifos); |
| 120 | da = action_fifo_put(fifo); |
| 121 | if (da) { |
| 122 | da->skb = skb; |
| 123 | da->actions = attr; |
| 124 | da->pkt_key = *key; |
| 125 | } |
| 126 | |
| 127 | return da; |
| 128 | } |
| 129 | |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 130 | static void invalidate_flow_key(struct sw_flow_key *key) |
| 131 | { |
| 132 | key->eth.type = htons(0); |
| 133 | } |
| 134 | |
| 135 | static bool is_flow_key_valid(const struct sw_flow_key *key) |
| 136 | { |
| 137 | return !!key->eth.type; |
| 138 | } |
| 139 | |
Simon Horman | bc7cc59 | 2016-05-30 14:04:25 +0900 | [diff] [blame] | 140 | static void update_ethertype(struct sk_buff *skb, struct ethhdr *hdr, |
| 141 | __be16 ethertype) |
| 142 | { |
| 143 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
| 144 | __be16 diff[] = { ~(hdr->h_proto), ethertype }; |
| 145 | |
| 146 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), |
| 147 | ~skb->csum); |
| 148 | } |
| 149 | |
| 150 | hdr->h_proto = ethertype; |
| 151 | } |
| 152 | |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 153 | static int push_mpls(struct sk_buff *skb, struct sw_flow_key *key, |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 154 | const struct ovs_action_push_mpls *mpls) |
| 155 | { |
| 156 | __be32 *new_mpls_lse; |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 157 | |
| 158 | /* Networking stack do not allow simultaneous Tunnel and MPLS GSO. */ |
| 159 | if (skb->encapsulation) |
| 160 | return -ENOTSUPP; |
| 161 | |
| 162 | if (skb_cow_head(skb, MPLS_HLEN) < 0) |
| 163 | return -ENOMEM; |
| 164 | |
David Ahern | 48d2ab6 | 2016-08-24 20:10:44 -0700 | [diff] [blame^] | 165 | if (!skb->inner_protocol) { |
| 166 | skb_set_inner_network_header(skb, skb->mac_len); |
| 167 | skb_set_inner_protocol(skb, skb->protocol); |
| 168 | } |
| 169 | |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 170 | skb_push(skb, MPLS_HLEN); |
| 171 | memmove(skb_mac_header(skb) - MPLS_HLEN, skb_mac_header(skb), |
| 172 | skb->mac_len); |
| 173 | skb_reset_mac_header(skb); |
David Ahern | 48d2ab6 | 2016-08-24 20:10:44 -0700 | [diff] [blame^] | 174 | skb_set_network_header(skb, skb->mac_len); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 175 | |
| 176 | new_mpls_lse = (__be32 *)skb_mpls_header(skb); |
| 177 | *new_mpls_lse = mpls->mpls_lse; |
| 178 | |
Daniel Borkmann | 6b83d28 | 2016-02-20 00:29:30 +0100 | [diff] [blame] | 179 | skb_postpush_rcsum(skb, new_mpls_lse, MPLS_HLEN); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 180 | |
Simon Horman | bc7cc59 | 2016-05-30 14:04:25 +0900 | [diff] [blame] | 181 | update_ethertype(skb, eth_hdr(skb), mpls->mpls_ethertype); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 182 | skb->protocol = mpls->mpls_ethertype; |
| 183 | |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 184 | invalidate_flow_key(key); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 185 | return 0; |
| 186 | } |
| 187 | |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 188 | static int pop_mpls(struct sk_buff *skb, struct sw_flow_key *key, |
| 189 | const __be16 ethertype) |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 190 | { |
| 191 | struct ethhdr *hdr; |
| 192 | int err; |
| 193 | |
Jiri Pirko | e219512 | 2014-11-19 14:05:01 +0100 | [diff] [blame] | 194 | err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 195 | if (unlikely(err)) |
| 196 | return err; |
| 197 | |
Jiri Pirko | 1abcd82 | 2014-11-19 14:04:55 +0100 | [diff] [blame] | 198 | skb_postpull_rcsum(skb, skb_mpls_header(skb), MPLS_HLEN); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 199 | |
| 200 | memmove(skb_mac_header(skb) + MPLS_HLEN, skb_mac_header(skb), |
| 201 | skb->mac_len); |
| 202 | |
| 203 | __skb_pull(skb, MPLS_HLEN); |
| 204 | skb_reset_mac_header(skb); |
David Ahern | 48d2ab6 | 2016-08-24 20:10:44 -0700 | [diff] [blame^] | 205 | skb_set_network_header(skb, skb->mac_len); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 206 | |
| 207 | /* skb_mpls_header() is used to locate the ethertype |
| 208 | * field correctly in the presence of VLAN tags. |
| 209 | */ |
| 210 | hdr = (struct ethhdr *)(skb_mpls_header(skb) - ETH_HLEN); |
Simon Horman | bc7cc59 | 2016-05-30 14:04:25 +0900 | [diff] [blame] | 211 | update_ethertype(skb, hdr, ethertype); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 212 | if (eth_p_mpls(skb->protocol)) |
| 213 | skb->protocol = ethertype; |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 214 | |
| 215 | invalidate_flow_key(key); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 216 | return 0; |
| 217 | } |
| 218 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 219 | static int set_mpls(struct sk_buff *skb, struct sw_flow_key *flow_key, |
| 220 | const __be32 *mpls_lse, const __be32 *mask) |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 221 | { |
| 222 | __be32 *stack; |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 223 | __be32 lse; |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 224 | int err; |
| 225 | |
Jiri Pirko | e219512 | 2014-11-19 14:05:01 +0100 | [diff] [blame] | 226 | err = skb_ensure_writable(skb, skb->mac_len + MPLS_HLEN); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 227 | if (unlikely(err)) |
| 228 | return err; |
| 229 | |
| 230 | stack = (__be32 *)skb_mpls_header(skb); |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 231 | lse = OVS_MASKED(*stack, *mpls_lse, *mask); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 232 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 233 | __be32 diff[] = { ~(*stack), lse }; |
| 234 | |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 235 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), |
| 236 | ~skb->csum); |
| 237 | } |
| 238 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 239 | *stack = lse; |
| 240 | flow_key->mpls.top_lse = lse; |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 241 | return 0; |
| 242 | } |
| 243 | |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 244 | static int pop_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 245 | { |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 246 | int err; |
| 247 | |
Jiri Pirko | 93515d5 | 2014-11-19 14:05:02 +0100 | [diff] [blame] | 248 | err = skb_vlan_pop(skb); |
Jiri Pirko | df8a39d | 2015-01-13 17:13:44 +0100 | [diff] [blame] | 249 | if (skb_vlan_tag_present(skb)) |
Jiri Pirko | 93515d5 | 2014-11-19 14:05:02 +0100 | [diff] [blame] | 250 | invalidate_flow_key(key); |
| 251 | else |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 252 | key->eth.tci = 0; |
Jiri Pirko | 93515d5 | 2014-11-19 14:05:02 +0100 | [diff] [blame] | 253 | return err; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 254 | } |
| 255 | |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 256 | static int push_vlan(struct sk_buff *skb, struct sw_flow_key *key, |
| 257 | const struct ovs_action_push_vlan *vlan) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 258 | { |
Jiri Pirko | df8a39d | 2015-01-13 17:13:44 +0100 | [diff] [blame] | 259 | if (skb_vlan_tag_present(skb)) |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 260 | invalidate_flow_key(key); |
Jiri Pirko | 93515d5 | 2014-11-19 14:05:02 +0100 | [diff] [blame] | 261 | else |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 262 | key->eth.tci = vlan->vlan_tci; |
Jiri Pirko | 93515d5 | 2014-11-19 14:05:02 +0100 | [diff] [blame] | 263 | return skb_vlan_push(skb, vlan->vlan_tpid, |
| 264 | ntohs(vlan->vlan_tci) & ~VLAN_TAG_PRESENT); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 265 | } |
| 266 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 267 | /* 'src' is already properly masked. */ |
| 268 | static void ether_addr_copy_masked(u8 *dst_, const u8 *src_, const u8 *mask_) |
| 269 | { |
| 270 | u16 *dst = (u16 *)dst_; |
| 271 | const u16 *src = (const u16 *)src_; |
| 272 | const u16 *mask = (const u16 *)mask_; |
| 273 | |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 274 | OVS_SET_MASKED(dst[0], src[0], mask[0]); |
| 275 | OVS_SET_MASKED(dst[1], src[1], mask[1]); |
| 276 | OVS_SET_MASKED(dst[2], src[2], mask[2]); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | static int set_eth_addr(struct sk_buff *skb, struct sw_flow_key *flow_key, |
| 280 | const struct ovs_key_ethernet *key, |
| 281 | const struct ovs_key_ethernet *mask) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 282 | { |
| 283 | int err; |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 284 | |
Jiri Pirko | e219512 | 2014-11-19 14:05:01 +0100 | [diff] [blame] | 285 | err = skb_ensure_writable(skb, ETH_HLEN); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 286 | if (unlikely(err)) |
| 287 | return err; |
| 288 | |
Pravin B Shelar | b34df5e | 2013-06-13 11:11:44 -0700 | [diff] [blame] | 289 | skb_postpull_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2); |
| 290 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 291 | ether_addr_copy_masked(eth_hdr(skb)->h_source, key->eth_src, |
| 292 | mask->eth_src); |
| 293 | ether_addr_copy_masked(eth_hdr(skb)->h_dest, key->eth_dst, |
| 294 | mask->eth_dst); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 295 | |
Daniel Borkmann | 6b83d28 | 2016-02-20 00:29:30 +0100 | [diff] [blame] | 296 | skb_postpush_rcsum(skb, eth_hdr(skb), ETH_ALEN * 2); |
Pravin B Shelar | b34df5e | 2013-06-13 11:11:44 -0700 | [diff] [blame] | 297 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 298 | ether_addr_copy(flow_key->eth.src, eth_hdr(skb)->h_source); |
| 299 | ether_addr_copy(flow_key->eth.dst, eth_hdr(skb)->h_dest); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 300 | return 0; |
| 301 | } |
| 302 | |
Glenn Griffin | 3576fd7 | 2015-08-03 09:56:54 -0700 | [diff] [blame] | 303 | static void update_ip_l4_checksum(struct sk_buff *skb, struct iphdr *nh, |
| 304 | __be32 addr, __be32 new_addr) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 305 | { |
| 306 | int transport_len = skb->len - skb_transport_offset(skb); |
| 307 | |
Glenn Griffin | 3576fd7 | 2015-08-03 09:56:54 -0700 | [diff] [blame] | 308 | if (nh->frag_off & htons(IP_OFFSET)) |
| 309 | return; |
| 310 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 311 | if (nh->protocol == IPPROTO_TCP) { |
| 312 | if (likely(transport_len >= sizeof(struct tcphdr))) |
| 313 | inet_proto_csum_replace4(&tcp_hdr(skb)->check, skb, |
Tom Herbert | 4b048d6 | 2015-08-17 13:42:25 -0700 | [diff] [blame] | 314 | addr, new_addr, true); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 315 | } else if (nh->protocol == IPPROTO_UDP) { |
Jesse Gross | 81e5d41 | 2012-03-06 15:05:46 -0800 | [diff] [blame] | 316 | if (likely(transport_len >= sizeof(struct udphdr))) { |
| 317 | struct udphdr *uh = udp_hdr(skb); |
| 318 | |
| 319 | if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) { |
| 320 | inet_proto_csum_replace4(&uh->check, skb, |
Tom Herbert | 4b048d6 | 2015-08-17 13:42:25 -0700 | [diff] [blame] | 321 | addr, new_addr, true); |
Jesse Gross | 81e5d41 | 2012-03-06 15:05:46 -0800 | [diff] [blame] | 322 | if (!uh->check) |
| 323 | uh->check = CSUM_MANGLED_0; |
| 324 | } |
| 325 | } |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 326 | } |
Glenn Griffin | 3576fd7 | 2015-08-03 09:56:54 -0700 | [diff] [blame] | 327 | } |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 328 | |
Glenn Griffin | 3576fd7 | 2015-08-03 09:56:54 -0700 | [diff] [blame] | 329 | static void set_ip_addr(struct sk_buff *skb, struct iphdr *nh, |
| 330 | __be32 *addr, __be32 new_addr) |
| 331 | { |
| 332 | update_ip_l4_checksum(skb, nh, *addr, new_addr); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 333 | csum_replace4(&nh->check, *addr, new_addr); |
Tom Herbert | 7539fad | 2013-12-15 22:12:18 -0800 | [diff] [blame] | 334 | skb_clear_hash(skb); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 335 | *addr = new_addr; |
| 336 | } |
| 337 | |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 338 | static void update_ipv6_checksum(struct sk_buff *skb, u8 l4_proto, |
| 339 | __be32 addr[4], const __be32 new_addr[4]) |
| 340 | { |
| 341 | int transport_len = skb->len - skb_transport_offset(skb); |
| 342 | |
Jesse Gross | 856447d | 2014-11-11 14:32:20 -0800 | [diff] [blame] | 343 | if (l4_proto == NEXTHDR_TCP) { |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 344 | if (likely(transport_len >= sizeof(struct tcphdr))) |
| 345 | inet_proto_csum_replace16(&tcp_hdr(skb)->check, skb, |
Tom Herbert | 4b048d6 | 2015-08-17 13:42:25 -0700 | [diff] [blame] | 346 | addr, new_addr, true); |
Jesse Gross | 856447d | 2014-11-11 14:32:20 -0800 | [diff] [blame] | 347 | } else if (l4_proto == NEXTHDR_UDP) { |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 348 | if (likely(transport_len >= sizeof(struct udphdr))) { |
| 349 | struct udphdr *uh = udp_hdr(skb); |
| 350 | |
| 351 | if (uh->check || skb->ip_summed == CHECKSUM_PARTIAL) { |
| 352 | inet_proto_csum_replace16(&uh->check, skb, |
Tom Herbert | 4b048d6 | 2015-08-17 13:42:25 -0700 | [diff] [blame] | 353 | addr, new_addr, true); |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 354 | if (!uh->check) |
| 355 | uh->check = CSUM_MANGLED_0; |
| 356 | } |
| 357 | } |
Jesse Gross | 856447d | 2014-11-11 14:32:20 -0800 | [diff] [blame] | 358 | } else if (l4_proto == NEXTHDR_ICMP) { |
| 359 | if (likely(transport_len >= sizeof(struct icmp6hdr))) |
| 360 | inet_proto_csum_replace16(&icmp6_hdr(skb)->icmp6_cksum, |
Tom Herbert | 4b048d6 | 2015-08-17 13:42:25 -0700 | [diff] [blame] | 361 | skb, addr, new_addr, true); |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 362 | } |
| 363 | } |
| 364 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 365 | static void mask_ipv6_addr(const __be32 old[4], const __be32 addr[4], |
| 366 | const __be32 mask[4], __be32 masked[4]) |
| 367 | { |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 368 | masked[0] = OVS_MASKED(old[0], addr[0], mask[0]); |
| 369 | masked[1] = OVS_MASKED(old[1], addr[1], mask[1]); |
| 370 | masked[2] = OVS_MASKED(old[2], addr[2], mask[2]); |
| 371 | masked[3] = OVS_MASKED(old[3], addr[3], mask[3]); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 372 | } |
| 373 | |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 374 | static void set_ipv6_addr(struct sk_buff *skb, u8 l4_proto, |
| 375 | __be32 addr[4], const __be32 new_addr[4], |
| 376 | bool recalculate_csum) |
| 377 | { |
| 378 | if (recalculate_csum) |
| 379 | update_ipv6_checksum(skb, l4_proto, addr, new_addr); |
| 380 | |
Tom Herbert | 7539fad | 2013-12-15 22:12:18 -0800 | [diff] [blame] | 381 | skb_clear_hash(skb); |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 382 | memcpy(addr, new_addr, sizeof(__be32[4])); |
| 383 | } |
| 384 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 385 | static void set_ipv6_fl(struct ipv6hdr *nh, u32 fl, u32 mask) |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 386 | { |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 387 | /* Bits 21-24 are always unmasked, so this retains their values. */ |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 388 | OVS_SET_MASKED(nh->flow_lbl[0], (u8)(fl >> 16), (u8)(mask >> 16)); |
| 389 | OVS_SET_MASKED(nh->flow_lbl[1], (u8)(fl >> 8), (u8)(mask >> 8)); |
| 390 | OVS_SET_MASKED(nh->flow_lbl[2], (u8)fl, (u8)mask); |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 391 | } |
| 392 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 393 | static void set_ip_ttl(struct sk_buff *skb, struct iphdr *nh, u8 new_ttl, |
| 394 | u8 mask) |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 395 | { |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 396 | new_ttl = OVS_MASKED(nh->ttl, new_ttl, mask); |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 397 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 398 | csum_replace2(&nh->check, htons(nh->ttl << 8), htons(new_ttl << 8)); |
| 399 | nh->ttl = new_ttl; |
| 400 | } |
| 401 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 402 | static int set_ipv4(struct sk_buff *skb, struct sw_flow_key *flow_key, |
| 403 | const struct ovs_key_ipv4 *key, |
| 404 | const struct ovs_key_ipv4 *mask) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 405 | { |
| 406 | struct iphdr *nh; |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 407 | __be32 new_addr; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 408 | int err; |
| 409 | |
Jiri Pirko | e219512 | 2014-11-19 14:05:01 +0100 | [diff] [blame] | 410 | err = skb_ensure_writable(skb, skb_network_offset(skb) + |
| 411 | sizeof(struct iphdr)); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 412 | if (unlikely(err)) |
| 413 | return err; |
| 414 | |
| 415 | nh = ip_hdr(skb); |
| 416 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 417 | /* Setting an IP addresses is typically only a side effect of |
| 418 | * matching on them in the current userspace implementation, so it |
| 419 | * makes sense to check if the value actually changed. |
| 420 | */ |
| 421 | if (mask->ipv4_src) { |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 422 | new_addr = OVS_MASKED(nh->saddr, key->ipv4_src, mask->ipv4_src); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 423 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 424 | if (unlikely(new_addr != nh->saddr)) { |
| 425 | set_ip_addr(skb, nh, &nh->saddr, new_addr); |
| 426 | flow_key->ipv4.addr.src = new_addr; |
| 427 | } |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 428 | } |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 429 | if (mask->ipv4_dst) { |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 430 | new_addr = OVS_MASKED(nh->daddr, key->ipv4_dst, mask->ipv4_dst); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 431 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 432 | if (unlikely(new_addr != nh->daddr)) { |
| 433 | set_ip_addr(skb, nh, &nh->daddr, new_addr); |
| 434 | flow_key->ipv4.addr.dst = new_addr; |
| 435 | } |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 436 | } |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 437 | if (mask->ipv4_tos) { |
| 438 | ipv4_change_dsfield(nh, ~mask->ipv4_tos, key->ipv4_tos); |
| 439 | flow_key->ip.tos = nh->tos; |
| 440 | } |
| 441 | if (mask->ipv4_ttl) { |
| 442 | set_ip_ttl(skb, nh, key->ipv4_ttl, mask->ipv4_ttl); |
| 443 | flow_key->ip.ttl = nh->ttl; |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 444 | } |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 445 | |
| 446 | return 0; |
| 447 | } |
| 448 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 449 | static bool is_ipv6_mask_nonzero(const __be32 addr[4]) |
| 450 | { |
| 451 | return !!(addr[0] | addr[1] | addr[2] | addr[3]); |
| 452 | } |
| 453 | |
| 454 | static int set_ipv6(struct sk_buff *skb, struct sw_flow_key *flow_key, |
| 455 | const struct ovs_key_ipv6 *key, |
| 456 | const struct ovs_key_ipv6 *mask) |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 457 | { |
| 458 | struct ipv6hdr *nh; |
| 459 | int err; |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 460 | |
Jiri Pirko | e219512 | 2014-11-19 14:05:01 +0100 | [diff] [blame] | 461 | err = skb_ensure_writable(skb, skb_network_offset(skb) + |
| 462 | sizeof(struct ipv6hdr)); |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 463 | if (unlikely(err)) |
| 464 | return err; |
| 465 | |
| 466 | nh = ipv6_hdr(skb); |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 467 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 468 | /* Setting an IP addresses is typically only a side effect of |
| 469 | * matching on them in the current userspace implementation, so it |
| 470 | * makes sense to check if the value actually changed. |
| 471 | */ |
| 472 | if (is_ipv6_mask_nonzero(mask->ipv6_src)) { |
| 473 | __be32 *saddr = (__be32 *)&nh->saddr; |
| 474 | __be32 masked[4]; |
| 475 | |
| 476 | mask_ipv6_addr(saddr, key->ipv6_src, mask->ipv6_src, masked); |
| 477 | |
| 478 | if (unlikely(memcmp(saddr, masked, sizeof(masked)))) { |
Simon Horman | b4f7052 | 2016-04-21 11:49:15 +1000 | [diff] [blame] | 479 | set_ipv6_addr(skb, flow_key->ip.proto, saddr, masked, |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 480 | true); |
| 481 | memcpy(&flow_key->ipv6.addr.src, masked, |
| 482 | sizeof(flow_key->ipv6.addr.src)); |
| 483 | } |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 484 | } |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 485 | if (is_ipv6_mask_nonzero(mask->ipv6_dst)) { |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 486 | unsigned int offset = 0; |
| 487 | int flags = IP6_FH_F_SKIP_RH; |
| 488 | bool recalc_csum = true; |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 489 | __be32 *daddr = (__be32 *)&nh->daddr; |
| 490 | __be32 masked[4]; |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 491 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 492 | mask_ipv6_addr(daddr, key->ipv6_dst, mask->ipv6_dst, masked); |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 493 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 494 | if (unlikely(memcmp(daddr, masked, sizeof(masked)))) { |
| 495 | if (ipv6_ext_hdr(nh->nexthdr)) |
| 496 | recalc_csum = (ipv6_find_hdr(skb, &offset, |
| 497 | NEXTHDR_ROUTING, |
| 498 | NULL, &flags) |
| 499 | != NEXTHDR_ROUTING); |
| 500 | |
Simon Horman | b4f7052 | 2016-04-21 11:49:15 +1000 | [diff] [blame] | 501 | set_ipv6_addr(skb, flow_key->ip.proto, daddr, masked, |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 502 | recalc_csum); |
| 503 | memcpy(&flow_key->ipv6.addr.dst, masked, |
| 504 | sizeof(flow_key->ipv6.addr.dst)); |
| 505 | } |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 506 | } |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 507 | if (mask->ipv6_tclass) { |
| 508 | ipv6_change_dsfield(nh, ~mask->ipv6_tclass, key->ipv6_tclass); |
| 509 | flow_key->ip.tos = ipv6_get_dsfield(nh); |
| 510 | } |
| 511 | if (mask->ipv6_label) { |
| 512 | set_ipv6_fl(nh, ntohl(key->ipv6_label), |
| 513 | ntohl(mask->ipv6_label)); |
| 514 | flow_key->ipv6.label = |
| 515 | *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); |
| 516 | } |
| 517 | if (mask->ipv6_hlimit) { |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 518 | OVS_SET_MASKED(nh->hop_limit, key->ipv6_hlimit, |
| 519 | mask->ipv6_hlimit); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 520 | flow_key->ip.ttl = nh->hop_limit; |
| 521 | } |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 522 | return 0; |
| 523 | } |
| 524 | |
Jiri Pirko | e219512 | 2014-11-19 14:05:01 +0100 | [diff] [blame] | 525 | /* Must follow skb_ensure_writable() since that can move the skb data. */ |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 526 | static void set_tp_port(struct sk_buff *skb, __be16 *port, |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 527 | __be16 new_port, __sum16 *check) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 528 | { |
Tom Herbert | 4b048d6 | 2015-08-17 13:42:25 -0700 | [diff] [blame] | 529 | inet_proto_csum_replace2(check, skb, *port, new_port, false); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 530 | *port = new_port; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 531 | } |
| 532 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 533 | static int set_udp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
| 534 | const struct ovs_key_udp *key, |
| 535 | const struct ovs_key_udp *mask) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 536 | { |
| 537 | struct udphdr *uh; |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 538 | __be16 src, dst; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 539 | int err; |
| 540 | |
Jiri Pirko | e219512 | 2014-11-19 14:05:01 +0100 | [diff] [blame] | 541 | err = skb_ensure_writable(skb, skb_transport_offset(skb) + |
| 542 | sizeof(struct udphdr)); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 543 | if (unlikely(err)) |
| 544 | return err; |
| 545 | |
| 546 | uh = udp_hdr(skb); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 547 | /* Either of the masks is non-zero, so do not bother checking them. */ |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 548 | src = OVS_MASKED(uh->source, key->udp_src, mask->udp_src); |
| 549 | dst = OVS_MASKED(uh->dest, key->udp_dst, mask->udp_dst); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 550 | |
| 551 | if (uh->check && skb->ip_summed != CHECKSUM_PARTIAL) { |
| 552 | if (likely(src != uh->source)) { |
| 553 | set_tp_port(skb, &uh->source, src, &uh->check); |
| 554 | flow_key->tp.src = src; |
| 555 | } |
| 556 | if (likely(dst != uh->dest)) { |
| 557 | set_tp_port(skb, &uh->dest, dst, &uh->check); |
| 558 | flow_key->tp.dst = dst; |
| 559 | } |
| 560 | |
| 561 | if (unlikely(!uh->check)) |
| 562 | uh->check = CSUM_MANGLED_0; |
| 563 | } else { |
| 564 | uh->source = src; |
| 565 | uh->dest = dst; |
| 566 | flow_key->tp.src = src; |
| 567 | flow_key->tp.dst = dst; |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 568 | } |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 569 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 570 | skb_clear_hash(skb); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 571 | |
| 572 | return 0; |
| 573 | } |
| 574 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 575 | static int set_tcp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
| 576 | const struct ovs_key_tcp *key, |
| 577 | const struct ovs_key_tcp *mask) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 578 | { |
| 579 | struct tcphdr *th; |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 580 | __be16 src, dst; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 581 | int err; |
| 582 | |
Jiri Pirko | e219512 | 2014-11-19 14:05:01 +0100 | [diff] [blame] | 583 | err = skb_ensure_writable(skb, skb_transport_offset(skb) + |
| 584 | sizeof(struct tcphdr)); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 585 | if (unlikely(err)) |
| 586 | return err; |
| 587 | |
| 588 | th = tcp_hdr(skb); |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 589 | src = OVS_MASKED(th->source, key->tcp_src, mask->tcp_src); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 590 | if (likely(src != th->source)) { |
| 591 | set_tp_port(skb, &th->source, src, &th->check); |
| 592 | flow_key->tp.src = src; |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 593 | } |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 594 | dst = OVS_MASKED(th->dest, key->tcp_dst, mask->tcp_dst); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 595 | if (likely(dst != th->dest)) { |
| 596 | set_tp_port(skb, &th->dest, dst, &th->check); |
| 597 | flow_key->tp.dst = dst; |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 598 | } |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 599 | skb_clear_hash(skb); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 600 | |
| 601 | return 0; |
| 602 | } |
| 603 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 604 | static int set_sctp(struct sk_buff *skb, struct sw_flow_key *flow_key, |
| 605 | const struct ovs_key_sctp *key, |
| 606 | const struct ovs_key_sctp *mask) |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 607 | { |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 608 | unsigned int sctphoff = skb_transport_offset(skb); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 609 | struct sctphdr *sh; |
| 610 | __le32 old_correct_csum, new_csum, old_csum; |
| 611 | int err; |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 612 | |
Jiri Pirko | e219512 | 2014-11-19 14:05:01 +0100 | [diff] [blame] | 613 | err = skb_ensure_writable(skb, sctphoff + sizeof(struct sctphdr)); |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 614 | if (unlikely(err)) |
| 615 | return err; |
| 616 | |
| 617 | sh = sctp_hdr(skb); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 618 | old_csum = sh->checksum; |
| 619 | old_correct_csum = sctp_compute_cksum(skb, sctphoff); |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 620 | |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 621 | sh->source = OVS_MASKED(sh->source, key->sctp_src, mask->sctp_src); |
| 622 | sh->dest = OVS_MASKED(sh->dest, key->sctp_dst, mask->sctp_dst); |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 623 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 624 | new_csum = sctp_compute_cksum(skb, sctphoff); |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 625 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 626 | /* Carry any checksum errors through. */ |
| 627 | sh->checksum = old_csum ^ old_correct_csum ^ new_csum; |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 628 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 629 | skb_clear_hash(skb); |
| 630 | flow_key->tp.src = sh->source; |
| 631 | flow_key->tp.dst = sh->dest; |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 632 | |
| 633 | return 0; |
| 634 | } |
| 635 | |
Eric W. Biederman | 188515f | 2015-09-14 20:08:51 -0500 | [diff] [blame] | 636 | static int ovs_vport_output(struct net *net, struct sock *sk, struct sk_buff *skb) |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 637 | { |
| 638 | struct ovs_frag_data *data = this_cpu_ptr(&ovs_frag_data_storage); |
| 639 | struct vport *vport = data->vport; |
| 640 | |
| 641 | if (skb_cow_head(skb, data->l2_len) < 0) { |
| 642 | kfree_skb(skb); |
| 643 | return -ENOMEM; |
| 644 | } |
| 645 | |
| 646 | __skb_dst_copy(skb, data->dst); |
| 647 | *OVS_CB(skb) = data->cb; |
| 648 | skb->inner_protocol = data->inner_protocol; |
| 649 | skb->vlan_tci = data->vlan_tci; |
| 650 | skb->vlan_proto = data->vlan_proto; |
| 651 | |
| 652 | /* Reconstruct the MAC header. */ |
| 653 | skb_push(skb, data->l2_len); |
| 654 | memcpy(skb->data, &data->l2_data, data->l2_len); |
Daniel Borkmann | 6b83d28 | 2016-02-20 00:29:30 +0100 | [diff] [blame] | 655 | skb_postpush_rcsum(skb, skb->data, data->l2_len); |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 656 | skb_reset_mac_header(skb); |
| 657 | |
| 658 | ovs_vport_send(vport, skb); |
| 659 | return 0; |
| 660 | } |
| 661 | |
| 662 | static unsigned int |
| 663 | ovs_dst_get_mtu(const struct dst_entry *dst) |
| 664 | { |
| 665 | return dst->dev->mtu; |
| 666 | } |
| 667 | |
| 668 | static struct dst_ops ovs_dst_ops = { |
| 669 | .family = AF_UNSPEC, |
| 670 | .mtu = ovs_dst_get_mtu, |
| 671 | }; |
| 672 | |
| 673 | /* prepare_frag() is called once per (larger-than-MTU) frame; its inverse is |
| 674 | * ovs_vport_output(), which is called once per fragmented packet. |
| 675 | */ |
| 676 | static void prepare_frag(struct vport *vport, struct sk_buff *skb) |
| 677 | { |
| 678 | unsigned int hlen = skb_network_offset(skb); |
| 679 | struct ovs_frag_data *data; |
| 680 | |
| 681 | data = this_cpu_ptr(&ovs_frag_data_storage); |
| 682 | data->dst = skb->_skb_refdst; |
| 683 | data->vport = vport; |
| 684 | data->cb = *OVS_CB(skb); |
| 685 | data->inner_protocol = skb->inner_protocol; |
| 686 | data->vlan_tci = skb->vlan_tci; |
| 687 | data->vlan_proto = skb->vlan_proto; |
| 688 | data->l2_len = hlen; |
| 689 | memcpy(&data->l2_data, skb->data, hlen); |
| 690 | |
| 691 | memset(IPCB(skb), 0, sizeof(struct inet_skb_parm)); |
| 692 | skb_pull(skb, hlen); |
| 693 | } |
| 694 | |
Eric W. Biederman | c559cd3 | 2015-09-14 20:10:28 -0500 | [diff] [blame] | 695 | static void ovs_fragment(struct net *net, struct vport *vport, |
| 696 | struct sk_buff *skb, u16 mru, __be16 ethertype) |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 697 | { |
| 698 | if (skb_network_offset(skb) > MAX_L2_LEN) { |
| 699 | OVS_NLERR(1, "L2 header too long to fragment"); |
Joe Stringer | b8f2257 | 2015-10-06 10:59:57 -0700 | [diff] [blame] | 700 | goto err; |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 701 | } |
| 702 | |
| 703 | if (ethertype == htons(ETH_P_IP)) { |
| 704 | struct dst_entry ovs_dst; |
| 705 | unsigned long orig_dst; |
| 706 | |
| 707 | prepare_frag(vport, skb); |
| 708 | dst_init(&ovs_dst, &ovs_dst_ops, NULL, 1, |
| 709 | DST_OBSOLETE_NONE, DST_NOCOUNT); |
| 710 | ovs_dst.dev = vport->dev; |
| 711 | |
| 712 | orig_dst = skb->_skb_refdst; |
| 713 | skb_dst_set_noref(skb, &ovs_dst); |
| 714 | IPCB(skb)->frag_max_size = mru; |
| 715 | |
Eric W. Biederman | 694869b | 2015-06-12 21:55:31 -0500 | [diff] [blame] | 716 | ip_do_fragment(net, skb->sk, skb, ovs_vport_output); |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 717 | refdst_drop(orig_dst); |
| 718 | } else if (ethertype == htons(ETH_P_IPV6)) { |
| 719 | const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops(); |
| 720 | unsigned long orig_dst; |
| 721 | struct rt6_info ovs_rt; |
| 722 | |
| 723 | if (!v6ops) { |
Joe Stringer | b8f2257 | 2015-10-06 10:59:57 -0700 | [diff] [blame] | 724 | goto err; |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 725 | } |
| 726 | |
| 727 | prepare_frag(vport, skb); |
| 728 | memset(&ovs_rt, 0, sizeof(ovs_rt)); |
| 729 | dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL, 1, |
| 730 | DST_OBSOLETE_NONE, DST_NOCOUNT); |
| 731 | ovs_rt.dst.dev = vport->dev; |
| 732 | |
| 733 | orig_dst = skb->_skb_refdst; |
| 734 | skb_dst_set_noref(skb, &ovs_rt.dst); |
| 735 | IP6CB(skb)->frag_max_size = mru; |
| 736 | |
Eric W. Biederman | 7d8c6e3 | 2015-06-12 22:12:04 -0500 | [diff] [blame] | 737 | v6ops->fragment(net, skb->sk, skb, ovs_vport_output); |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 738 | refdst_drop(orig_dst); |
| 739 | } else { |
| 740 | WARN_ONCE(1, "Failed fragment ->%s: eth=%04x, MRU=%d, MTU=%d.", |
| 741 | ovs_vport_name(vport), ntohs(ethertype), mru, |
| 742 | vport->dev->mtu); |
Joe Stringer | b8f2257 | 2015-10-06 10:59:57 -0700 | [diff] [blame] | 743 | goto err; |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 744 | } |
Joe Stringer | b8f2257 | 2015-10-06 10:59:57 -0700 | [diff] [blame] | 745 | |
| 746 | return; |
| 747 | err: |
| 748 | kfree_skb(skb); |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 749 | } |
| 750 | |
| 751 | static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port, |
| 752 | struct sw_flow_key *key) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 753 | { |
Andy Zhou | 738967b | 2014-09-08 00:35:02 -0700 | [diff] [blame] | 754 | struct vport *vport = ovs_vport_rcu(dp, out_port); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 755 | |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 756 | if (likely(vport)) { |
| 757 | u16 mru = OVS_CB(skb)->mru; |
William Tu | f2a4d08 | 2016-06-10 11:49:33 -0700 | [diff] [blame] | 758 | u32 cutlen = OVS_CB(skb)->cutlen; |
| 759 | |
| 760 | if (unlikely(cutlen > 0)) { |
| 761 | if (skb->len - cutlen > ETH_HLEN) |
| 762 | pskb_trim(skb, skb->len - cutlen); |
| 763 | else |
| 764 | pskb_trim(skb, ETH_HLEN); |
| 765 | } |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 766 | |
| 767 | if (likely(!mru || (skb->len <= mru + ETH_HLEN))) { |
| 768 | ovs_vport_send(vport, skb); |
| 769 | } else if (mru <= vport->dev->mtu) { |
Eric W. Biederman | c559cd3 | 2015-09-14 20:10:28 -0500 | [diff] [blame] | 770 | struct net *net = read_pnet(&dp->net); |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 771 | __be16 ethertype = key->eth.type; |
| 772 | |
| 773 | if (!is_flow_key_valid(key)) { |
| 774 | if (eth_p_mpls(skb->protocol)) |
| 775 | ethertype = skb->inner_protocol; |
| 776 | else |
| 777 | ethertype = vlan_get_protocol(skb); |
| 778 | } |
| 779 | |
Eric W. Biederman | c559cd3 | 2015-09-14 20:10:28 -0500 | [diff] [blame] | 780 | ovs_fragment(net, vport, skb, mru, ethertype); |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 781 | } else { |
| 782 | kfree_skb(skb); |
| 783 | } |
| 784 | } else { |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 785 | kfree_skb(skb); |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 786 | } |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | static int output_userspace(struct datapath *dp, struct sk_buff *skb, |
Neil McKee | ccea744 | 2015-05-26 20:59:43 -0700 | [diff] [blame] | 790 | struct sw_flow_key *key, const struct nlattr *attr, |
William Tu | f2a4d08 | 2016-06-10 11:49:33 -0700 | [diff] [blame] | 791 | const struct nlattr *actions, int actions_len, |
| 792 | uint32_t cutlen) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 793 | { |
| 794 | struct dp_upcall_info upcall; |
| 795 | const struct nlattr *a; |
| 796 | int rem; |
| 797 | |
Neil McKee | ccea744 | 2015-05-26 20:59:43 -0700 | [diff] [blame] | 798 | memset(&upcall, 0, sizeof(upcall)); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 799 | upcall.cmd = OVS_PACKET_CMD_ACTION; |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 800 | upcall.mru = OVS_CB(skb)->mru; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 801 | |
| 802 | for (a = nla_data(attr), rem = nla_len(attr); rem > 0; |
| 803 | a = nla_next(a, &rem)) { |
| 804 | switch (nla_type(a)) { |
| 805 | case OVS_USERSPACE_ATTR_USERDATA: |
| 806 | upcall.userdata = a; |
| 807 | break; |
| 808 | |
| 809 | case OVS_USERSPACE_ATTR_PID: |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 810 | upcall.portid = nla_get_u32(a); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 811 | break; |
Wenyu Zhang | 8f0aad6 | 2014-11-06 06:51:24 -0800 | [diff] [blame] | 812 | |
| 813 | case OVS_USERSPACE_ATTR_EGRESS_TUN_PORT: { |
| 814 | /* Get out tunnel info. */ |
| 815 | struct vport *vport; |
| 816 | |
| 817 | vport = ovs_vport_rcu(dp, nla_get_u32(a)); |
| 818 | if (vport) { |
| 819 | int err; |
| 820 | |
Pravin B Shelar | fc4099f | 2015-10-22 18:17:16 -0700 | [diff] [blame] | 821 | err = dev_fill_metadata_dst(vport->dev, skb); |
| 822 | if (!err) |
| 823 | upcall.egress_tun_info = skb_tunnel_info(skb); |
Wenyu Zhang | 8f0aad6 | 2014-11-06 06:51:24 -0800 | [diff] [blame] | 824 | } |
Pravin B Shelar | 4c22279 | 2015-08-30 18:09:38 -0700 | [diff] [blame] | 825 | |
Wenyu Zhang | 8f0aad6 | 2014-11-06 06:51:24 -0800 | [diff] [blame] | 826 | break; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 827 | } |
Wenyu Zhang | 8f0aad6 | 2014-11-06 06:51:24 -0800 | [diff] [blame] | 828 | |
Neil McKee | ccea744 | 2015-05-26 20:59:43 -0700 | [diff] [blame] | 829 | case OVS_USERSPACE_ATTR_ACTIONS: { |
| 830 | /* Include actions. */ |
| 831 | upcall.actions = actions; |
| 832 | upcall.actions_len = actions_len; |
| 833 | break; |
| 834 | } |
| 835 | |
Wenyu Zhang | 8f0aad6 | 2014-11-06 06:51:24 -0800 | [diff] [blame] | 836 | } /* End of switch. */ |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 837 | } |
| 838 | |
William Tu | f2a4d08 | 2016-06-10 11:49:33 -0700 | [diff] [blame] | 839 | return ovs_dp_upcall(dp, skb, key, &upcall, cutlen); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 840 | } |
| 841 | |
| 842 | static int sample(struct datapath *dp, struct sk_buff *skb, |
Neil McKee | ccea744 | 2015-05-26 20:59:43 -0700 | [diff] [blame] | 843 | struct sw_flow_key *key, const struct nlattr *attr, |
| 844 | const struct nlattr *actions, int actions_len) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 845 | { |
| 846 | const struct nlattr *acts_list = NULL; |
| 847 | const struct nlattr *a; |
| 848 | int rem; |
William Tu | f2a4d08 | 2016-06-10 11:49:33 -0700 | [diff] [blame] | 849 | u32 cutlen = 0; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 850 | |
| 851 | for (a = nla_data(attr), rem = nla_len(attr); rem > 0; |
| 852 | a = nla_next(a, &rem)) { |
Wenyu Zhang | e05176a | 2015-08-05 00:30:47 -0700 | [diff] [blame] | 853 | u32 probability; |
| 854 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 855 | switch (nla_type(a)) { |
| 856 | case OVS_SAMPLE_ATTR_PROBABILITY: |
Wenyu Zhang | e05176a | 2015-08-05 00:30:47 -0700 | [diff] [blame] | 857 | probability = nla_get_u32(a); |
| 858 | if (!probability || prandom_u32() > probability) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 859 | return 0; |
| 860 | break; |
| 861 | |
| 862 | case OVS_SAMPLE_ATTR_ACTIONS: |
| 863 | acts_list = a; |
| 864 | break; |
| 865 | } |
| 866 | } |
| 867 | |
Simon Horman | 651887b | 2014-07-21 15:12:34 -0700 | [diff] [blame] | 868 | rem = nla_len(acts_list); |
| 869 | a = nla_data(acts_list); |
| 870 | |
Andy Zhou | 32ae87f | 2014-09-15 19:33:50 -0700 | [diff] [blame] | 871 | /* Actions list is empty, do nothing */ |
| 872 | if (unlikely(!rem)) |
| 873 | return 0; |
Simon Horman | 651887b | 2014-07-21 15:12:34 -0700 | [diff] [blame] | 874 | |
Andy Zhou | 32ae87f | 2014-09-15 19:33:50 -0700 | [diff] [blame] | 875 | /* The only known usage of sample action is having a single user-space |
William Tu | f2a4d08 | 2016-06-10 11:49:33 -0700 | [diff] [blame] | 876 | * action, or having a truncate action followed by a single user-space |
Andy Zhou | 32ae87f | 2014-09-15 19:33:50 -0700 | [diff] [blame] | 877 | * action. Treat this usage as a special case. |
| 878 | * The output_userspace() should clone the skb to be sent to the |
| 879 | * user space. This skb will be consumed by its caller. |
Simon Horman | 651887b | 2014-07-21 15:12:34 -0700 | [diff] [blame] | 880 | */ |
William Tu | f2a4d08 | 2016-06-10 11:49:33 -0700 | [diff] [blame] | 881 | if (unlikely(nla_type(a) == OVS_ACTION_ATTR_TRUNC)) { |
| 882 | struct ovs_action_trunc *trunc = nla_data(a); |
| 883 | |
| 884 | if (skb->len > trunc->max_len) |
| 885 | cutlen = skb->len - trunc->max_len; |
| 886 | |
| 887 | a = nla_next(a, &rem); |
| 888 | } |
| 889 | |
Andy Zhou | 32ae87f | 2014-09-15 19:33:50 -0700 | [diff] [blame] | 890 | if (likely(nla_type(a) == OVS_ACTION_ATTR_USERSPACE && |
Simon Horman | 941d8eb | 2014-10-27 16:12:16 +0900 | [diff] [blame] | 891 | nla_is_last(a, rem))) |
William Tu | f2a4d08 | 2016-06-10 11:49:33 -0700 | [diff] [blame] | 892 | return output_userspace(dp, skb, key, a, actions, |
| 893 | actions_len, cutlen); |
Andy Zhou | 32ae87f | 2014-09-15 19:33:50 -0700 | [diff] [blame] | 894 | |
| 895 | skb = skb_clone(skb, GFP_ATOMIC); |
| 896 | if (!skb) |
| 897 | /* Skip the sample action when out of memory. */ |
| 898 | return 0; |
| 899 | |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 900 | if (!add_deferred_actions(skb, key, a)) { |
| 901 | if (net_ratelimit()) |
| 902 | pr_warn("%s: deferred actions limit reached, dropping sample action\n", |
| 903 | ovs_dp_name(dp)); |
| 904 | |
| 905 | kfree_skb(skb); |
| 906 | } |
| 907 | return 0; |
| 908 | } |
| 909 | |
| 910 | static void execute_hash(struct sk_buff *skb, struct sw_flow_key *key, |
| 911 | const struct nlattr *attr) |
| 912 | { |
| 913 | struct ovs_action_hash *hash_act = nla_data(attr); |
| 914 | u32 hash = 0; |
| 915 | |
| 916 | /* OVS_HASH_ALG_L4 is the only possible hash algorithm. */ |
| 917 | hash = skb_get_hash(skb); |
| 918 | hash = jhash_1word(hash, hash_act->hash_basis); |
| 919 | if (!hash) |
| 920 | hash = 0x1; |
| 921 | |
| 922 | key->ovs_flow_hash = hash; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 923 | } |
| 924 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 925 | static int execute_set_action(struct sk_buff *skb, |
| 926 | struct sw_flow_key *flow_key, |
| 927 | const struct nlattr *a) |
| 928 | { |
| 929 | /* Only tunnel set execution is supported without a mask. */ |
| 930 | if (nla_type(a) == OVS_KEY_ATTR_TUNNEL_INFO) { |
Thomas Graf | 34ae932 | 2015-07-21 10:44:03 +0200 | [diff] [blame] | 931 | struct ovs_tunnel_info *tun = nla_data(a); |
| 932 | |
| 933 | skb_dst_drop(skb); |
| 934 | dst_hold((struct dst_entry *)tun->tun_dst); |
| 935 | skb_dst_set(skb, (struct dst_entry *)tun->tun_dst); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 936 | return 0; |
| 937 | } |
| 938 | |
| 939 | return -EINVAL; |
| 940 | } |
| 941 | |
| 942 | /* Mask is at the midpoint of the data. */ |
| 943 | #define get_mask(a, type) ((const type)nla_data(a) + 1) |
| 944 | |
| 945 | static int execute_masked_set_action(struct sk_buff *skb, |
| 946 | struct sw_flow_key *flow_key, |
| 947 | const struct nlattr *a) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 948 | { |
| 949 | int err = 0; |
| 950 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 951 | switch (nla_type(a)) { |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 952 | case OVS_KEY_ATTR_PRIORITY: |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 953 | OVS_SET_MASKED(skb->priority, nla_get_u32(a), |
| 954 | *get_mask(a, u32 *)); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 955 | flow_key->phy.priority = skb->priority; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 956 | break; |
| 957 | |
Ansis Atteka | 39c7caeb | 2012-11-26 11:24:11 -0800 | [diff] [blame] | 958 | case OVS_KEY_ATTR_SKB_MARK: |
Joe Stringer | be26b9a | 2015-08-26 11:31:45 -0700 | [diff] [blame] | 959 | OVS_SET_MASKED(skb->mark, nla_get_u32(a), *get_mask(a, u32 *)); |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 960 | flow_key->phy.skb_mark = skb->mark; |
Ansis Atteka | 39c7caeb | 2012-11-26 11:24:11 -0800 | [diff] [blame] | 961 | break; |
| 962 | |
Jesse Gross | f0b128c | 2014-10-03 15:35:31 -0700 | [diff] [blame] | 963 | case OVS_KEY_ATTR_TUNNEL_INFO: |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 964 | /* Masked data not supported for tunnel. */ |
| 965 | err = -EINVAL; |
Pravin B Shelar | 7d5437c | 2013-06-17 17:50:18 -0700 | [diff] [blame] | 966 | break; |
| 967 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 968 | case OVS_KEY_ATTR_ETHERNET: |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 969 | err = set_eth_addr(skb, flow_key, nla_data(a), |
| 970 | get_mask(a, struct ovs_key_ethernet *)); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 971 | break; |
| 972 | |
| 973 | case OVS_KEY_ATTR_IPV4: |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 974 | err = set_ipv4(skb, flow_key, nla_data(a), |
| 975 | get_mask(a, struct ovs_key_ipv4 *)); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 976 | break; |
| 977 | |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 978 | case OVS_KEY_ATTR_IPV6: |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 979 | err = set_ipv6(skb, flow_key, nla_data(a), |
| 980 | get_mask(a, struct ovs_key_ipv6 *)); |
Ansis Atteka | 3fdbd1c | 2012-11-13 15:44:14 -0800 | [diff] [blame] | 981 | break; |
| 982 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 983 | case OVS_KEY_ATTR_TCP: |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 984 | err = set_tcp(skb, flow_key, nla_data(a), |
| 985 | get_mask(a, struct ovs_key_tcp *)); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 986 | break; |
| 987 | |
| 988 | case OVS_KEY_ATTR_UDP: |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 989 | err = set_udp(skb, flow_key, nla_data(a), |
| 990 | get_mask(a, struct ovs_key_udp *)); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 991 | break; |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 992 | |
| 993 | case OVS_KEY_ATTR_SCTP: |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 994 | err = set_sctp(skb, flow_key, nla_data(a), |
| 995 | get_mask(a, struct ovs_key_sctp *)); |
Joe Stringer | a175a72 | 2013-08-22 12:30:48 -0700 | [diff] [blame] | 996 | break; |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 997 | |
| 998 | case OVS_KEY_ATTR_MPLS: |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 999 | err = set_mpls(skb, flow_key, nla_data(a), get_mask(a, |
| 1000 | __be32 *)); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 1001 | break; |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 1002 | |
| 1003 | case OVS_KEY_ATTR_CT_STATE: |
| 1004 | case OVS_KEY_ATTR_CT_ZONE: |
Joe Stringer | 182e304 | 2015-08-26 11:31:49 -0700 | [diff] [blame] | 1005 | case OVS_KEY_ATTR_CT_MARK: |
Joe Stringer | 33db412 | 2015-10-01 15:00:37 -0700 | [diff] [blame] | 1006 | case OVS_KEY_ATTR_CT_LABELS: |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 1007 | err = -EINVAL; |
| 1008 | break; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1009 | } |
| 1010 | |
| 1011 | return err; |
| 1012 | } |
| 1013 | |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1014 | static int execute_recirc(struct datapath *dp, struct sk_buff *skb, |
| 1015 | struct sw_flow_key *key, |
| 1016 | const struct nlattr *a, int rem) |
| 1017 | { |
| 1018 | struct deferred_action *da; |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1019 | |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 1020 | if (!is_flow_key_valid(key)) { |
| 1021 | int err; |
| 1022 | |
| 1023 | err = ovs_flow_key_update(skb, key); |
| 1024 | if (err) |
| 1025 | return err; |
| 1026 | } |
| 1027 | BUG_ON(!is_flow_key_valid(key)); |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1028 | |
Simon Horman | 941d8eb | 2014-10-27 16:12:16 +0900 | [diff] [blame] | 1029 | if (!nla_is_last(a, rem)) { |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1030 | /* Recirc action is the not the last action |
| 1031 | * of the action list, need to clone the skb. |
| 1032 | */ |
| 1033 | skb = skb_clone(skb, GFP_ATOMIC); |
| 1034 | |
| 1035 | /* Skip the recirc action when out of memory, but |
| 1036 | * continue on with the rest of the action list. |
| 1037 | */ |
| 1038 | if (!skb) |
| 1039 | return 0; |
| 1040 | } |
| 1041 | |
| 1042 | da = add_deferred_actions(skb, key, NULL); |
| 1043 | if (da) { |
| 1044 | da->pkt_key.recirc_id = nla_get_u32(a); |
| 1045 | } else { |
| 1046 | kfree_skb(skb); |
| 1047 | |
| 1048 | if (net_ratelimit()) |
| 1049 | pr_warn("%s: deferred action limit reached, drop recirc action\n", |
| 1050 | ovs_dp_name(dp)); |
| 1051 | } |
| 1052 | |
| 1053 | return 0; |
| 1054 | } |
| 1055 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1056 | /* Execute a list of actions against 'skb'. */ |
| 1057 | static int do_execute_actions(struct datapath *dp, struct sk_buff *skb, |
Pravin B Shelar | 2ff3e4e | 2014-09-15 19:15:28 -0700 | [diff] [blame] | 1058 | struct sw_flow_key *key, |
Simon Horman | 651887b | 2014-07-21 15:12:34 -0700 | [diff] [blame] | 1059 | const struct nlattr *attr, int len) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1060 | { |
| 1061 | /* Every output action needs a separate clone of 'skb', but the common |
| 1062 | * case is just a single output action, so that doing a clone and |
| 1063 | * then freeing the original skbuff is wasteful. So the following code |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 1064 | * is slightly obscure just to avoid that. |
| 1065 | */ |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1066 | int prev_port = -1; |
| 1067 | const struct nlattr *a; |
| 1068 | int rem; |
| 1069 | |
| 1070 | for (a = attr, rem = len; rem > 0; |
| 1071 | a = nla_next(a, &rem)) { |
| 1072 | int err = 0; |
| 1073 | |
Andy Zhou | 738967b | 2014-09-08 00:35:02 -0700 | [diff] [blame] | 1074 | if (unlikely(prev_port != -1)) { |
| 1075 | struct sk_buff *out_skb = skb_clone(skb, GFP_ATOMIC); |
| 1076 | |
| 1077 | if (out_skb) |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 1078 | do_output(dp, out_skb, prev_port, key); |
Andy Zhou | 738967b | 2014-09-08 00:35:02 -0700 | [diff] [blame] | 1079 | |
William Tu | f2a4d08 | 2016-06-10 11:49:33 -0700 | [diff] [blame] | 1080 | OVS_CB(skb)->cutlen = 0; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1081 | prev_port = -1; |
| 1082 | } |
| 1083 | |
| 1084 | switch (nla_type(a)) { |
| 1085 | case OVS_ACTION_ATTR_OUTPUT: |
| 1086 | prev_port = nla_get_u32(a); |
| 1087 | break; |
| 1088 | |
William Tu | f2a4d08 | 2016-06-10 11:49:33 -0700 | [diff] [blame] | 1089 | case OVS_ACTION_ATTR_TRUNC: { |
| 1090 | struct ovs_action_trunc *trunc = nla_data(a); |
| 1091 | |
| 1092 | if (skb->len > trunc->max_len) |
| 1093 | OVS_CB(skb)->cutlen = skb->len - trunc->max_len; |
| 1094 | break; |
| 1095 | } |
| 1096 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1097 | case OVS_ACTION_ATTR_USERSPACE: |
William Tu | f2a4d08 | 2016-06-10 11:49:33 -0700 | [diff] [blame] | 1098 | output_userspace(dp, skb, key, a, attr, |
| 1099 | len, OVS_CB(skb)->cutlen); |
| 1100 | OVS_CB(skb)->cutlen = 0; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1101 | break; |
| 1102 | |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1103 | case OVS_ACTION_ATTR_HASH: |
| 1104 | execute_hash(skb, key, a); |
| 1105 | break; |
| 1106 | |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 1107 | case OVS_ACTION_ATTR_PUSH_MPLS: |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 1108 | err = push_mpls(skb, key, nla_data(a)); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 1109 | break; |
| 1110 | |
| 1111 | case OVS_ACTION_ATTR_POP_MPLS: |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 1112 | err = pop_mpls(skb, key, nla_get_be16(a)); |
Simon Horman | 25cd9ba | 2014-10-06 05:05:13 -0700 | [diff] [blame] | 1113 | break; |
| 1114 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1115 | case OVS_ACTION_ATTR_PUSH_VLAN: |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 1116 | err = push_vlan(skb, key, nla_data(a)); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1117 | break; |
| 1118 | |
| 1119 | case OVS_ACTION_ATTR_POP_VLAN: |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 1120 | err = pop_vlan(skb, key); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1121 | break; |
| 1122 | |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1123 | case OVS_ACTION_ATTR_RECIRC: |
| 1124 | err = execute_recirc(dp, skb, key, a, rem); |
Simon Horman | 941d8eb | 2014-10-27 16:12:16 +0900 | [diff] [blame] | 1125 | if (nla_is_last(a, rem)) { |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1126 | /* If this is the last action, the skb has |
| 1127 | * been consumed or freed. |
| 1128 | * Return immediately. |
| 1129 | */ |
| 1130 | return err; |
| 1131 | } |
| 1132 | break; |
| 1133 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1134 | case OVS_ACTION_ATTR_SET: |
Pravin B Shelar | fff06c3 | 2014-11-06 06:55:14 -0800 | [diff] [blame] | 1135 | err = execute_set_action(skb, key, nla_data(a)); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1136 | break; |
| 1137 | |
Jarno Rajahalme | 83d2b9b | 2015-02-05 13:40:49 -0800 | [diff] [blame] | 1138 | case OVS_ACTION_ATTR_SET_MASKED: |
| 1139 | case OVS_ACTION_ATTR_SET_TO_MASKED: |
| 1140 | err = execute_masked_set_action(skb, key, nla_data(a)); |
| 1141 | break; |
| 1142 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1143 | case OVS_ACTION_ATTR_SAMPLE: |
Neil McKee | ccea744 | 2015-05-26 20:59:43 -0700 | [diff] [blame] | 1144 | err = sample(dp, skb, key, a, attr, len); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1145 | break; |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 1146 | |
| 1147 | case OVS_ACTION_ATTR_CT: |
Joe Stringer | ec0d043 | 2015-10-06 10:59:58 -0700 | [diff] [blame] | 1148 | if (!is_flow_key_valid(key)) { |
| 1149 | err = ovs_flow_key_update(skb, key); |
| 1150 | if (err) |
| 1151 | return err; |
| 1152 | } |
| 1153 | |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 1154 | err = ovs_ct_execute(ovs_dp_get_net(dp), skb, key, |
| 1155 | nla_data(a)); |
| 1156 | |
| 1157 | /* Hide stolen IP fragments from user space. */ |
Joe Stringer | 74c1661 | 2015-10-25 20:21:48 -0700 | [diff] [blame] | 1158 | if (err) |
| 1159 | return err == -EINPROGRESS ? 0 : err; |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 1160 | break; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1161 | } |
| 1162 | |
| 1163 | if (unlikely(err)) { |
| 1164 | kfree_skb(skb); |
| 1165 | return err; |
| 1166 | } |
| 1167 | } |
| 1168 | |
Simon Horman | 651887b | 2014-07-21 15:12:34 -0700 | [diff] [blame] | 1169 | if (prev_port != -1) |
Joe Stringer | 7f8a436 | 2015-08-26 11:31:48 -0700 | [diff] [blame] | 1170 | do_output(dp, skb, prev_port, key); |
Simon Horman | 651887b | 2014-07-21 15:12:34 -0700 | [diff] [blame] | 1171 | else |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1172 | consume_skb(skb); |
| 1173 | |
| 1174 | return 0; |
| 1175 | } |
| 1176 | |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1177 | static void process_deferred_actions(struct datapath *dp) |
| 1178 | { |
| 1179 | struct action_fifo *fifo = this_cpu_ptr(action_fifos); |
| 1180 | |
| 1181 | /* Do not touch the FIFO in case there is no deferred actions. */ |
| 1182 | if (action_fifo_is_empty(fifo)) |
| 1183 | return; |
| 1184 | |
| 1185 | /* Finishing executing all deferred actions. */ |
| 1186 | do { |
| 1187 | struct deferred_action *da = action_fifo_get(fifo); |
| 1188 | struct sk_buff *skb = da->skb; |
| 1189 | struct sw_flow_key *key = &da->pkt_key; |
| 1190 | const struct nlattr *actions = da->actions; |
| 1191 | |
| 1192 | if (actions) |
| 1193 | do_execute_actions(dp, skb, key, actions, |
| 1194 | nla_len(actions)); |
| 1195 | else |
| 1196 | ovs_dp_process_packet(skb, key); |
| 1197 | } while (!action_fifo_is_empty(fifo)); |
| 1198 | |
| 1199 | /* Reset FIFO for the next packet. */ |
| 1200 | action_fifo_init(fifo); |
| 1201 | } |
| 1202 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1203 | /* Execute a list of actions against 'skb'. */ |
Pravin B Shelar | 2ff3e4e | 2014-09-15 19:15:28 -0700 | [diff] [blame] | 1204 | int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb, |
Thomas Graf | 12eb18f | 2014-11-06 06:58:52 -0800 | [diff] [blame] | 1205 | const struct sw_flow_actions *acts, |
| 1206 | struct sw_flow_key *key) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1207 | { |
Hannes Frederic Sowa | b064d0d | 2016-01-18 18:03:48 +0100 | [diff] [blame] | 1208 | static const int ovs_recursion_limit = 5; |
| 1209 | int err, level; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1210 | |
Hannes Frederic Sowa | b064d0d | 2016-01-18 18:03:48 +0100 | [diff] [blame] | 1211 | level = __this_cpu_inc_return(exec_actions_level); |
| 1212 | if (unlikely(level > ovs_recursion_limit)) { |
| 1213 | net_crit_ratelimited("ovs: recursion limit reached on datapath %s, probable configuration error\n", |
| 1214 | ovs_dp_name(dp)); |
| 1215 | kfree_skb(skb); |
| 1216 | err = -ENETDOWN; |
| 1217 | goto out; |
| 1218 | } |
| 1219 | |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1220 | err = do_execute_actions(dp, skb, key, |
| 1221 | acts->actions, acts->actions_len); |
| 1222 | |
Hannes Frederic Sowa | b064d0d | 2016-01-18 18:03:48 +0100 | [diff] [blame] | 1223 | if (level == 1) |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1224 | process_deferred_actions(dp); |
| 1225 | |
Hannes Frederic Sowa | b064d0d | 2016-01-18 18:03:48 +0100 | [diff] [blame] | 1226 | out: |
| 1227 | __this_cpu_dec(exec_actions_level); |
Andy Zhou | 971427f3 | 2014-09-15 19:37:25 -0700 | [diff] [blame] | 1228 | return err; |
| 1229 | } |
| 1230 | |
| 1231 | int action_fifos_init(void) |
| 1232 | { |
| 1233 | action_fifos = alloc_percpu(struct action_fifo); |
| 1234 | if (!action_fifos) |
| 1235 | return -ENOMEM; |
| 1236 | |
| 1237 | return 0; |
| 1238 | } |
| 1239 | |
| 1240 | void action_fifos_exit(void) |
| 1241 | { |
| 1242 | free_percpu(action_fifos); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1243 | } |