[mirror_ovs.git] / ofproto / tunnel.c

/* Copyright (c) 2013 Nicira, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. */

#include <config.h>
#include "tunnel.h"

#include <errno.h>

#include "ofproto/ofproto-provider.h"
#include "byte-order.h"
#include "dynamic-string.h"
#include "hash.h"
#include "hmap.h"
#include "netdev-vport.h"
#include "odp-util.h"
#include "packets.h"
#include "smap.h"
#include "socket-util.h"
#include "tunnel.h"
#include "vlog.h"

/* XXX:
 *
 * Disallow netdevs with names like "gre64_system" to prevent collisions. */

VLOG_DEFINE_THIS_MODULE(tunnel);

struct tnl_match {
    ovs_be64 in_key;
    ovs_be32 ip_src;
    ovs_be32 ip_dst;
    uint32_t odp_port;
    uint32_t skb_mark;
    bool in_key_flow;
};

struct tnl_port {
    struct hmap_node match_node;

    const struct ofport *ofport;
    unsigned int netdev_seq;
    struct tnl_match match;
};

static struct hmap tnl_match_map = HMAP_INITIALIZER(&tnl_match_map);

/* Returned to callers when their ofport will never be used to receive or send
 * tunnel traffic. Alternatively, we could ask the caller to delete their
 * ofport, but this would be unclean in the reconfguration case.  For the first
 * time, an ofproto provider would have to call ofproto_port_del() on itself.*/
static struct tnl_port void_tnl_port;

static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
static struct vlog_rate_limit dbg_rl = VLOG_RATE_LIMIT_INIT(60, 60);

static struct tnl_port *tnl_find(struct tnl_match *);
static struct tnl_port *tnl_find_exact(struct tnl_match *);
static uint32_t tnl_hash(struct tnl_match *);
static void tnl_match_fmt(const struct tnl_match *, struct ds *);
static char *tnl_port_fmt(const struct tnl_port *);
static void tnl_port_mod_log(const struct tnl_port *, const char *action);
static const char *tnl_port_get_name(const struct tnl_port *);

static struct tnl_port *
tnl_port_add__(const struct ofport *ofport, uint32_t odp_port,
               bool warn)
{
    const struct netdev_tunnel_config *cfg;
    struct tnl_port *existing_port;
    struct tnl_port *tnl_port;

    cfg = netdev_get_tunnel_config(ofport->netdev);
    ovs_assert(cfg);

    tnl_port = xzalloc(sizeof *tnl_port);
    tnl_port->ofport = ofport;
    tnl_port->netdev_seq = netdev_change_seq(tnl_port->ofport->netdev);

    tnl_port->match.in_key = cfg->in_key;
    tnl_port->match.ip_src = cfg->ip_src;
    tnl_port->match.ip_dst = cfg->ip_dst;
    tnl_port->match.skb_mark = cfg->ipsec ? IPSEC_MARK : 0;
    tnl_port->match.in_key_flow = cfg->in_key_flow;
    tnl_port->match.odp_port = odp_port;

    existing_port = tnl_find_exact(&tnl_port->match);
    if (existing_port) {
        if (warn) {
            struct ds ds = DS_EMPTY_INITIALIZER;
            tnl_match_fmt(&tnl_port->match, &ds);
            VLOG_WARN("%s: attempting to add tunnel port with same config as "
                      "port '%s' (%s)", tnl_port_get_name(tnl_port),
                      tnl_port_get_name(existing_port), ds_cstr(&ds));
            ds_destroy(&ds);
            free(tnl_port);
        }
        return &void_tnl_port;
    }

    hmap_insert(&tnl_match_map, &tnl_port->match_node,
                tnl_hash(&tnl_port->match));
    tnl_port_mod_log(tnl_port, "adding");
    return tnl_port;
}

/* Adds 'ofport' to the module with datapath port number 'odp_port'. 'ofport's
 * must be added before they can be used by the module. 'ofport' must be a
 * tunnel. */
struct tnl_port *
tnl_port_add(const struct ofport *ofport, uint32_t odp_port)
{
    return tnl_port_add__(ofport, odp_port, true);
}

/* Checks if the tnl_port pointed to by 'tnl_portp' needs reconfiguration due
 * to changes in its netdev_tunnel_config.  If it does, updates 'tnl_portp' to
 * point to a new tnl_port and returns true.  Otherwise, returns false.
 * 'ofport' and 'odp_port' should be the same as would be passed to
 * tnl_port_add(). */
bool
tnl_port_reconfigure(const struct ofport *ofport, uint32_t odp_port,
                     struct tnl_port **tnl_portp)
{
    struct tnl_port *tnl_port = *tnl_portp;

    if (tnl_port == &void_tnl_port) {
        *tnl_portp = tnl_port_add__(ofport, odp_port, false);
        return *tnl_portp != &void_tnl_port;
    } else if (tnl_port->ofport != ofport
               || tnl_port->match.odp_port != odp_port
               || tnl_port->netdev_seq != netdev_change_seq(ofport->netdev)) {
        VLOG_DBG("reconfiguring %s", tnl_port_get_name(tnl_port));
        tnl_port_del(tnl_port);
        *tnl_portp = tnl_port_add(ofport, odp_port);
        return true;
    }
    return false;
}

/* Removes 'tnl_port' from the module. */
void
tnl_port_del(struct tnl_port *tnl_port)
{
    if (tnl_port && tnl_port != &void_tnl_port) {
        tnl_port_mod_log(tnl_port, "removing");
        hmap_remove(&tnl_match_map, &tnl_port->match_node);
        free(tnl_port);
    }
}

/* Looks in the table of tunnels for a tunnel matching the metadata in 'flow'.
 * Returns the 'ofport' corresponding to the new in_port, or a null pointer if
 * none is found.
 *
 * Callers should verify that 'flow' needs to be received by calling
 * tnl_port_should_receive() before this function. */
const struct ofport *
tnl_port_receive(const struct flow *flow)
{
    char *pre_flow_str = NULL;
    struct tnl_port *tnl_port;
    struct tnl_match match;

    memset(&match, 0, sizeof match);
    match.odp_port = flow->in_port;
    match.ip_src = flow->tunnel.ip_dst;
    match.ip_dst = flow->tunnel.ip_src;
    match.in_key = flow->tunnel.tun_id;
    match.skb_mark = flow->skb_mark;

    tnl_port = tnl_find(&match);
    if (!tnl_port) {
        struct ds ds = DS_EMPTY_INITIALIZER;

        tnl_match_fmt(&match, &ds);
        VLOG_WARN_RL(&rl, "receive tunnel port not found (%s)", ds_cstr(&ds));
        ds_destroy(&ds);
        return NULL;
    }

    if (!VLOG_DROP_DBG(&dbg_rl)) {
        pre_flow_str = flow_to_string(flow);
    }

    if (pre_flow_str) {
        char *post_flow_str = flow_to_string(flow);
        char *tnl_str = tnl_port_fmt(tnl_port);
        VLOG_DBG("flow received\n"
                 "%s"
                 " pre: %s\n"
                 "post: %s",
                 tnl_str, pre_flow_str, post_flow_str);
        free(tnl_str);
        free(pre_flow_str);
        free(post_flow_str);
    }
    return tnl_port->ofport;
}

/* Given that 'flow' should be output to the ofport corresponding to
 * 'tnl_port', updates 'flow''s tunnel headers and returns the actual datapath
 * port that the output should happen on.  May return OVSP_NONE if the output
 * shouldn't occur. */
uint32_t
tnl_port_send(const struct tnl_port *tnl_port, struct flow *flow)
{
    const struct netdev_tunnel_config *cfg;
    char *pre_flow_str = NULL;

    if (tnl_port == &void_tnl_port) {
        return OVSP_NONE;
    }

    cfg = netdev_get_tunnel_config(tnl_port->ofport->netdev);
    ovs_assert(cfg);

    if (!VLOG_DROP_DBG(&dbg_rl)) {
        pre_flow_str = flow_to_string(flow);
    }

    flow->tunnel.ip_src = tnl_port->match.ip_src;
    flow->tunnel.ip_dst = tnl_port->match.ip_dst;
    flow->skb_mark = tnl_port->match.skb_mark;

    if (!cfg->out_key_flow) {
        flow->tunnel.tun_id = cfg->out_key;
    }

    if (cfg->ttl_inherit && is_ip_any(flow)) {
        flow->tunnel.ip_ttl = flow->nw_ttl;
    } else {
        flow->tunnel.ip_ttl = cfg->ttl;
    }

    if (cfg->tos_inherit && is_ip_any(flow)) {
        flow->tunnel.ip_tos = flow->nw_tos & IP_DSCP_MASK;
    } else {
        flow->tunnel.ip_tos = cfg->tos;
    }

    if ((flow->nw_tos & IP_ECN_MASK) == IP_ECN_CE) {
        flow->tunnel.ip_tos |= IP_ECN_ECT_0;
    } else {
        flow->tunnel.ip_tos |= flow->nw_tos & IP_ECN_MASK;
    }

    flow->tunnel.flags = (cfg->dont_fragment ? FLOW_TNL_F_DONT_FRAGMENT : 0)
        | (cfg->csum ? FLOW_TNL_F_CSUM : 0)
        | (cfg->out_key_present ? FLOW_TNL_F_KEY : 0);

    if (pre_flow_str) {
        char *post_flow_str = flow_to_string(flow);
        char *tnl_str = tnl_port_fmt(tnl_port);
        VLOG_DBG("flow sent\n"
                 "%s"
                 " pre: %s\n"
                 "post: %s",
                 tnl_str, pre_flow_str, post_flow_str);
        free(tnl_str);
        free(pre_flow_str);
        free(post_flow_str);
    }

    return tnl_port->match.odp_port;
}

static uint32_t
tnl_hash(struct tnl_match *match)
{
    BUILD_ASSERT_DECL(sizeof *match % sizeof(uint32_t) == 0);
    return hash_words((uint32_t *) match, sizeof *match / sizeof(uint32_t), 0);
}

static struct tnl_port *
tnl_find_exact(struct tnl_match *match)
{
    struct tnl_port *tnl_port;

    HMAP_FOR_EACH_WITH_HASH (tnl_port, match_node, tnl_hash(match),
                             &tnl_match_map) {
        if (!memcmp(match, &tnl_port->match, sizeof *match)) {
            return tnl_port;
        }
    }
    return NULL;
}

static struct tnl_port *
tnl_find(struct tnl_match *match_)
{
    struct tnl_match match = *match_;
    struct tnl_port *tnl_port;

    /* remote_ip, local_ip, in_key */
    tnl_port = tnl_find_exact(&match);
    if (tnl_port) {
        return tnl_port;
    }

    /* remote_ip, in_key */
    match.ip_src = 0;
    tnl_port = tnl_find_exact(&match);
    if (tnl_port) {
        return tnl_port;
    }
    match.ip_src = match_->ip_src;

    /* remote_ip, local_ip */
    match.in_key = 0;
    match.in_key_flow = true;
    tnl_port = tnl_find_exact(&match);
    if (tnl_port) {
        return tnl_port;
    }

    /* remote_ip */
    match.ip_src = 0;
    tnl_port = tnl_find_exact(&match);
    if (tnl_port) {
        return tnl_port;
    }

    return NULL;
}

static void
tnl_match_fmt(const struct tnl_match *match, struct ds *ds)
{
    ds_put_format(ds, IP_FMT"->"IP_FMT, IP_ARGS(match->ip_src),
                  IP_ARGS(match->ip_dst));

    if (match->in_key_flow) {
        ds_put_cstr(ds, ", key=flow");
    } else {
        ds_put_format(ds, ", key=%#"PRIx64, ntohll(match->in_key));
    }

    ds_put_format(ds, ", dp port=%"PRIu32, match->odp_port);
    ds_put_format(ds, ", skb mark=%"PRIu32, match->skb_mark);
}

static void
tnl_port_mod_log(const struct tnl_port *tnl_port, const char *action)
{
    if (VLOG_IS_DBG_ENABLED()) {
        struct ds ds = DS_EMPTY_INITIALIZER;

        tnl_match_fmt(&tnl_port->match, &ds);
        VLOG_INFO("%s tunnel port %s (%s)", action,
                  tnl_port_get_name(tnl_port), ds_cstr(&ds));
        ds_destroy(&ds);
    }
}

static char *
tnl_port_fmt(const struct tnl_port *tnl_port)
{
    const struct netdev_tunnel_config *cfg =
        netdev_get_tunnel_config(tnl_port->ofport->netdev);
    struct ds ds = DS_EMPTY_INITIALIZER;

    ds_put_format(&ds, "port %"PRIu32": %s (%s: ", tnl_port->match.odp_port,
                  tnl_port_get_name(tnl_port),
                  netdev_get_type(tnl_port->ofport->netdev));
    tnl_match_fmt(&tnl_port->match, &ds);

    if (cfg->out_key != cfg->in_key ||
        cfg->out_key_present != cfg->in_key_present ||
        cfg->out_key_flow != cfg->in_key_flow) {
        ds_put_cstr(&ds, ", out_key=");
        if (!cfg->out_key_present) {
            ds_put_cstr(&ds, "none");
        } else if (cfg->out_key_flow) {
            ds_put_cstr(&ds, "flow");
        } else {
            ds_put_format(&ds, "%#"PRIx64, ntohll(cfg->out_key));
        }
    }

    if (cfg->ttl_inherit) {
        ds_put_cstr(&ds, ", ttl=inherit");
    } else {
        ds_put_format(&ds, ", ttl=%"PRIu8, cfg->ttl);
    }

    if (cfg->tos_inherit) {
        ds_put_cstr(&ds, ", tos=inherit");
    } else if (cfg->tos) {
        ds_put_format(&ds, ", tos=%#"PRIx8, cfg->tos);
    }

    if (!cfg->dont_fragment) {
        ds_put_cstr(&ds, ", df=false");
    }

    if (cfg->csum) {
        ds_put_cstr(&ds, ", csum=true");
    }

    ds_put_cstr(&ds, ")\n");

    return ds_steal_cstr(&ds);
}

static const char *
tnl_port_get_name(const struct tnl_port *tnl_port)
{
    return netdev_get_name(tnl_port->ofport->netdev);
}
Commit	Line	Data
7d1a8e7a JG	1	/* Copyright (c) 2013 Nicira, Inc.
	2	*
	3	* Licensed under the Apache License, Version 2.0 (the "License");
	4	* you may not use this file except in compliance with the License.
	5	* You may obtain a copy of the License at:
	6	*
	7	* http://www.apache.org/licenses/LICENSE-2.0
	8	*
	9	* Unless required by applicable law or agreed to in writing, software
	10	* distributed under the License is distributed on an "AS IS" BASIS,
	11	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	12	* See the License for the specific language governing permissions and
	13	* limitations under the License. */
	14
	15	#include <config.h>
	16	#include "tunnel.h"
	17
	18	#include <errno.h>
	19
	20	#include "ofproto/ofproto-provider.h"
	21	#include "byte-order.h"
	22	#include "dynamic-string.h"
	23	#include "hash.h"
	24	#include "hmap.h"
	25	#include "netdev-vport.h"
	26	#include "odp-util.h"
	27	#include "packets.h"
	28	#include "smap.h"
	29	#include "socket-util.h"
	30	#include "tunnel.h"
	31	#include "vlog.h"
	32
	33	/* XXX:
	34	*
7d1a8e7a JG	35	* Disallow netdevs with names like "gre64_system" to prevent collisions. */
	36
	37	VLOG_DEFINE_THIS_MODULE(tunnel);
	38
	39	struct tnl_match {
	40	ovs_be64 in_key;
	41	ovs_be32 ip_src;
	42	ovs_be32 ip_dst;
	43	uint32_t odp_port;
09a0d2e7	44	uint32_t skb_mark;
7d1a8e7a JG	45	bool in_key_flow;
	46	};
	47
	48	struct tnl_port {
	49	struct hmap_node match_node;
	50
	51	const struct ofport *ofport;
	52	unsigned int netdev_seq;
	53	struct tnl_match match;
	54	};
	55
	56	static struct hmap tnl_match_map = HMAP_INITIALIZER(&tnl_match_map);
	57
	58	/* Returned to callers when their ofport will never be used to receive or send
	59	* tunnel traffic. Alternatively, we could ask the caller to delete their
	60	* ofport, but this would be unclean in the reconfguration case. For the first
	61	* time, an ofproto provider would have to call ofproto_port_del() on itself.*/
	62	static struct tnl_port void_tnl_port;
	63
	64	static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
	65	static struct vlog_rate_limit dbg_rl = VLOG_RATE_LIMIT_INIT(60, 60);
	66
	67	static struct tnl_port tnl_find(struct tnl_match );
	68	static struct tnl_port tnl_find_exact(struct tnl_match );
	69	static uint32_t tnl_hash(struct tnl_match *);
	70	static void tnl_match_fmt(const struct tnl_match , struct ds );
	71	static char tnl_port_fmt(const struct tnl_port );
	72	static void tnl_port_mod_log(const struct tnl_port , const char action);
	73	static const char tnl_port_get_name(const struct tnl_port );
	74
	75	static struct tnl_port *
	76	tnl_port_add__(const struct ofport *ofport, uint32_t odp_port,
	77	bool warn)
	78	{
	79	const struct netdev_tunnel_config *cfg;
	80	struct tnl_port *existing_port;
	81	struct tnl_port *tnl_port;
	82
	83	cfg = netdev_get_tunnel_config(ofport->netdev);
	84	ovs_assert(cfg);
	85
	86	tnl_port = xzalloc(sizeof *tnl_port);
	87	tnl_port->ofport = ofport;
	88	tnl_port->netdev_seq = netdev_change_seq(tnl_port->ofport->netdev);
	89
	90	tnl_port->match.in_key = cfg->in_key;
	91	tnl_port->match.ip_src = cfg->ip_src;
	92	tnl_port->match.ip_dst = cfg->ip_dst;
09a0d2e7	93	tnl_port->match.skb_mark = cfg->ipsec ? IPSEC_MARK : 0;
7d1a8e7a JG	94	tnl_port->match.in_key_flow = cfg->in_key_flow;
	95	tnl_port->match.odp_port = odp_port;
	96
	97	existing_port = tnl_find_exact(&tnl_port->match);
	98	if (existing_port) {
	99	if (warn) {
	100	struct ds ds = DS_EMPTY_INITIALIZER;
	101	tnl_match_fmt(&tnl_port->match, &ds);
	102	VLOG_WARN("%s: attempting to add tunnel port with same config as "
	103	"port '%s' (%s)", tnl_port_get_name(tnl_port),
	104	tnl_port_get_name(existing_port), ds_cstr(&ds));
	105	ds_destroy(&ds);
	106	free(tnl_port);
	107	}
	108	return &void_tnl_port;
	109	}
	110
	111	hmap_insert(&tnl_match_map, &tnl_port->match_node,
	112	tnl_hash(&tnl_port->match));
	113	tnl_port_mod_log(tnl_port, "adding");
	114	return tnl_port;
	115	}
	116
	117	/* Adds 'ofport' to the module with datapath port number 'odp_port'. 'ofport's
	118	* must be added before they can be used by the module. 'ofport' must be a
	119	* tunnel. */
	120	struct tnl_port *
	121	tnl_port_add(const struct ofport *ofport, uint32_t odp_port)
	122	{
	123	return tnl_port_add__(ofport, odp_port, true);
	124	}
	125
	126	/* Checks if the tnl_port pointed to by 'tnl_portp' needs reconfiguration due
	127	* to changes in its netdev_tunnel_config. If it does, updates 'tnl_portp' to
	128	* point to a new tnl_port and returns true. Otherwise, returns false.
	129	* 'ofport' and 'odp_port' should be the same as would be passed to
	130	* tnl_port_add(). */
	131	bool
	132	tnl_port_reconfigure(const struct ofport *ofport, uint32_t odp_port,
	133	struct tnl_port **tnl_portp)
	134	{
	135	struct tnl_port tnl_port = tnl_portp;
	136
	137	if (tnl_port == &void_tnl_port) {
	138	*tnl_portp = tnl_port_add__(ofport, odp_port, false);
	139	return *tnl_portp != &void_tnl_port;
	140	} else if (tnl_port->ofport != ofport
	141	\|\| tnl_port->match.odp_port != odp_port
	142	\|\| tnl_port->netdev_seq != netdev_change_seq(ofport->netdev)) {
	143	VLOG_DBG("reconfiguring %s", tnl_port_get_name(tnl_port));
	144	tnl_port_del(tnl_port);
	145	*tnl_portp = tnl_port_add(ofport, odp_port);
	146	return true;
	147	}
	148	return false;
	149	}
	150
	151	/* Removes 'tnl_port' from the module. */
	152	void
	153	tnl_port_del(struct tnl_port *tnl_port)
	154	{
	155	if (tnl_port && tnl_port != &void_tnl_port) {
	156	tnl_port_mod_log(tnl_port, "removing");
	157	hmap_remove(&tnl_match_map, &tnl_port->match_node);
158	free(tnl_port);
159	}
160	}
161
2301f7eb BP	162	/* Looks in the table of tunnels for a tunnel matching the metadata in 'flow'.
	163	* Returns the 'ofport' corresponding to the new in_port, or a null pointer if
	164	* none is found.
7d1a8e7a JG	165	*
7d1a8e7a JG	166	* Callers should verify that 'flow' needs to be received by calling
2301f7eb	167	* tnl_port_should_receive() before this function. */
7d1a8e7a	168	const struct ofport *
2301f7eb	169	tnl_port_receive(const struct flow *flow)
7d1a8e7a JG	170	{
	171	char *pre_flow_str = NULL;
	172	struct tnl_port *tnl_port;
	173	struct tnl_match match;
	174
	175	memset(&match, 0, sizeof match);
	176	match.odp_port = flow->in_port;
	177	match.ip_src = flow->tunnel.ip_dst;
	178	match.ip_dst = flow->tunnel.ip_src;
	179	match.in_key = flow->tunnel.tun_id;
09a0d2e7	180	match.skb_mark = flow->skb_mark;
7d1a8e7a JG	181
	182	tnl_port = tnl_find(&match);
	183	if (!tnl_port) {
	184	struct ds ds = DS_EMPTY_INITIALIZER;
	185
	186	tnl_match_fmt(&match, &ds);
	187	VLOG_WARN_RL(&rl, "receive tunnel port not found (%s)", ds_cstr(&ds));
	188	ds_destroy(&ds);
	189	return NULL;
	190	}
	191
7d1a8e7a JG	192	if (!VLOG_DROP_DBG(&dbg_rl)) {
	193	pre_flow_str = flow_to_string(flow);
	194	}
	195
7d1a8e7a JG	196	if (pre_flow_str) {
	197	char *post_flow_str = flow_to_string(flow);
	198	char *tnl_str = tnl_port_fmt(tnl_port);
	199	VLOG_DBG("flow received\n"
	200	"%s"
	201	" pre: %s\n"
	202	"post: %s",
	203	tnl_str, pre_flow_str, post_flow_str);
	204	free(tnl_str);
	205	free(pre_flow_str);
	206	free(post_flow_str);
	207	}
	208	return tnl_port->ofport;
	209	}
	210
	211	/* Given that 'flow' should be output to the ofport corresponding to
	212	* 'tnl_port', updates 'flow''s tunnel headers and returns the actual datapath
	213	* port that the output should happen on. May return OVSP_NONE if the output
	214	* shouldn't occur. */
	215	uint32_t
	216	tnl_port_send(const struct tnl_port tnl_port, struct flow flow)
	217	{
	218	const struct netdev_tunnel_config *cfg;
	219	char *pre_flow_str = NULL;
	220
	221	if (tnl_port == &void_tnl_port) {
	222	return OVSP_NONE;
	223	}
	224
	225	cfg = netdev_get_tunnel_config(tnl_port->ofport->netdev);
	226	ovs_assert(cfg);
	227
	228	if (!VLOG_DROP_DBG(&dbg_rl)) {
	229	pre_flow_str = flow_to_string(flow);
	230	}
	231
	232	flow->tunnel.ip_src = tnl_port->match.ip_src;
	233	flow->tunnel.ip_dst = tnl_port->match.ip_dst;
09a0d2e7	234	flow->skb_mark = tnl_port->match.skb_mark;
7d1a8e7a JG	235
	236	if (!cfg->out_key_flow) {
	237	flow->tunnel.tun_id = cfg->out_key;
	238	}
	239
	240	if (cfg->ttl_inherit && is_ip_any(flow)) {
	241	flow->tunnel.ip_ttl = flow->nw_ttl;
	242	} else {
	243	flow->tunnel.ip_ttl = cfg->ttl;
	244	}
	245
	246	if (cfg->tos_inherit && is_ip_any(flow)) {
	247	flow->tunnel.ip_tos = flow->nw_tos & IP_DSCP_MASK;
	248	} else {
	249	flow->tunnel.ip_tos = cfg->tos;
	250	}
	251
	252	if ((flow->nw_tos & IP_ECN_MASK) == IP_ECN_CE) {
	253	flow->tunnel.ip_tos \|= IP_ECN_ECT_0;
	254	} else {
	255	flow->tunnel.ip_tos \|= flow->nw_tos & IP_ECN_MASK;
	256	}
	257
	258	flow->tunnel.flags = (cfg->dont_fragment ? FLOW_TNL_F_DONT_FRAGMENT : 0)
	259	\| (cfg->csum ? FLOW_TNL_F_CSUM : 0)
	260	\| (cfg->out_key_present ? FLOW_TNL_F_KEY : 0);
	261
	262	if (pre_flow_str) {
	263	char *post_flow_str = flow_to_string(flow);
	264	char *tnl_str = tnl_port_fmt(tnl_port);
	265	VLOG_DBG("flow sent\n"
	266	"%s"
	267	" pre: %s\n"
	268	"post: %s",
	269	tnl_str, pre_flow_str, post_flow_str);
	270	free(tnl_str);
	271	free(pre_flow_str);
	272	free(post_flow_str);
	273	}
	274
	275	return tnl_port->match.odp_port;
	276	}
	277
	278	static uint32_t
	279	tnl_hash(struct tnl_match *match)
	280	{
	281	BUILD_ASSERT_DECL(sizeof *match % sizeof(uint32_t) == 0);
	282	return hash_words((uint32_t ) match, sizeof match / sizeof(uint32_t), 0);
	283	}
	284
	285	static struct tnl_port *
	286	tnl_find_exact(struct tnl_match *match)
	287	{
	288	struct tnl_port *tnl_port;
	289
	290	HMAP_FOR_EACH_WITH_HASH (tnl_port, match_node, tnl_hash(match),
	291	&tnl_match_map) {
	292	if (!memcmp(match, &tnl_port->match, sizeof *match)) {
	293	return tnl_port;
	294	}
	295	}
	296	return NULL;
	297	}
	298
299	static struct tnl_port *
300	tnl_find(struct tnl_match *match_)
301	{
302	struct tnl_match match = *match_;
7d1a8e7a JG	303	struct tnl_port *tnl_port;
	304
	305	/* remote_ip, local_ip, in_key */
85c9de19 PS	306	tnl_port = tnl_find_exact(&match);
	307	if (tnl_port) {
	308	return tnl_port;
7d1a8e7a JG	309	}
	310
	311	/* remote_ip, in_key */
	312	match.ip_src = 0;
	313	tnl_port = tnl_find_exact(&match);
	314	if (tnl_port) {
	315	return tnl_port;
	316	}
	317	match.ip_src = match_->ip_src;
	318
	319	/* remote_ip, local_ip */
85c9de19 PS	320	match.in_key = 0;
	321	match.in_key_flow = true;
	322	tnl_port = tnl_find_exact(&match);
	323	if (tnl_port) {
	324	return tnl_port;
7d1a8e7a JG	325	}
	326
	327	/* remote_ip */
	328	match.ip_src = 0;
7d1a8e7a JG	329	tnl_port = tnl_find_exact(&match);
	330	if (tnl_port) {
	331	return tnl_port;
	332	}
7d1a8e7a	333
7d1a8e7a JG	334	return NULL;
	335	}
	336
	337	static void
	338	tnl_match_fmt(const struct tnl_match match, struct ds ds)
	339	{
	340	ds_put_format(ds, IP_FMT"->"IP_FMT, IP_ARGS(match->ip_src),
	341	IP_ARGS(match->ip_dst));
	342
baa73637 EJ	343	if (match->in_key_flow) {
	344	ds_put_cstr(ds, ", key=flow");
	345	} else {
	346	ds_put_format(ds, ", key=%#"PRIx64, ntohll(match->in_key));
7d1a8e7a JG	347	}
	348
	349	ds_put_format(ds, ", dp port=%"PRIu32, match->odp_port);
09a0d2e7	350	ds_put_format(ds, ", skb mark=%"PRIu32, match->skb_mark);
7d1a8e7a JG	351	}
	352
	353	static void
	354	tnl_port_mod_log(const struct tnl_port tnl_port, const char action)
	355	{
	356	if (VLOG_IS_DBG_ENABLED()) {
	357	struct ds ds = DS_EMPTY_INITIALIZER;
	358
	359	tnl_match_fmt(&tnl_port->match, &ds);
74a99109 EJ	360	VLOG_INFO("%s tunnel port %s (%s)", action,
74a99109 EJ	361	tnl_port_get_name(tnl_port), ds_cstr(&ds));
7d1a8e7a JG	362	ds_destroy(&ds);
	363	}
	364	}
	365
	366	static char *
	367	tnl_port_fmt(const struct tnl_port *tnl_port)
	368	{
	369	const struct netdev_tunnel_config *cfg =
	370	netdev_get_tunnel_config(tnl_port->ofport->netdev);
	371	struct ds ds = DS_EMPTY_INITIALIZER;
	372
	373	ds_put_format(&ds, "port %"PRIu32": %s (%s: ", tnl_port->match.odp_port,
	374	tnl_port_get_name(tnl_port),
	375	netdev_get_type(tnl_port->ofport->netdev));
	376	tnl_match_fmt(&tnl_port->match, &ds);
	377
	378	if (cfg->out_key != cfg->in_key \|\|
	379	cfg->out_key_present != cfg->in_key_present \|\|
	380	cfg->out_key_flow != cfg->in_key_flow) {
	381	ds_put_cstr(&ds, ", out_key=");
	382	if (!cfg->out_key_present) {
	383	ds_put_cstr(&ds, "none");
	384	} else if (cfg->out_key_flow) {
	385	ds_put_cstr(&ds, "flow");
	386	} else {
	387	ds_put_format(&ds, "%#"PRIx64, ntohll(cfg->out_key));
	388	}
	389	}
	390
	391	if (cfg->ttl_inherit) {
	392	ds_put_cstr(&ds, ", ttl=inherit");
	393	} else {
	394	ds_put_format(&ds, ", ttl=%"PRIu8, cfg->ttl);
	395	}
	396
	397	if (cfg->tos_inherit) {
	398	ds_put_cstr(&ds, ", tos=inherit");
	399	} else if (cfg->tos) {
	400	ds_put_format(&ds, ", tos=%#"PRIx8, cfg->tos);
	401	}
	402
	403	if (!cfg->dont_fragment) {
	404	ds_put_cstr(&ds, ", df=false");
	405	}
	406
	407	if (cfg->csum) {
	408	ds_put_cstr(&ds, ", csum=true");
	409	}
	410
	411	ds_put_cstr(&ds, ")\n");
	412
	413	return ds_steal_cstr(&ds);
	414	}
	415
	416	static const char *
	417	tnl_port_get_name(const struct tnl_port *tnl_port)
	418	{
	419	return netdev_get_name(tnl_port->ofport->netdev);
	420	}