int error; /* 0 if no error yet, otherwise error code. */
};
-static struct ofopgroup *ofopgroup_create(struct ofproto *);
-static struct ofopgroup *ofopgroup_create_for_ofconn(struct ofconn *,
- const struct ofp_header *,
- uint32_t buffer_id);
+static struct ofopgroup *ofopgroup_create_unattached(struct ofproto *);
+static struct ofopgroup *ofopgroup_create(struct ofproto *, struct ofconn *,
+ const struct ofp_header *,
+ uint32_t buffer_id);
static void ofopgroup_submit(struct ofopgroup *);
static void ofopgroup_destroy(struct ofopgroup *);
static void ofopgroup_destroy(struct ofopgroup *);
static int add_flow(struct ofproto *, struct ofconn *,
- struct ofputil_flow_mod *, const struct ofp_header *);
-
-/* This return value tells handle_openflow() that processing of the current
- * OpenFlow message must be postponed until some ongoing operations have
- * completed.
- *
- * This particular value is a good choice because it is negative (so it won't
- * collide with any errno value or any value returned by ofp_mkerr()) and large
- * (so it won't accidentally collide with EOF or a negative errno value). */
-enum { OFPROTO_POSTPONE = -100000 };
+ const struct ofputil_flow_mod *,
+ const struct ofp_header *);
static bool handle_openflow(struct ofconn *, struct ofpbuf *);
+static int handle_flow_mod__(struct ofproto *, struct ofconn *,
+ const struct ofputil_flow_mod *,
+ const struct ofp_header *);
static void update_port(struct ofproto *, const char *devname);
static int init_ports(struct ofproto *);
static void reinit_ports(struct ofproto *);
+static void set_internal_devs_mtu(struct ofproto *);
static void ofproto_unixctl_init(void);
ofproto->connmgr = connmgr_create(ofproto, datapath_name, datapath_name);
ofproto->state = S_OPENFLOW;
list_init(&ofproto->pending);
+ ofproto->n_pending = 0;
hmap_init(&ofproto->deletions);
error = ofproto->ofproto_class->construct(ofproto, &n_tables);
}
}
-/* If forward_bpdu is true, the NORMAL action will forward frames with
+/* If forward_bpdu is true, the NORMAL action will forward frames with
* reserved (e.g. STP) destination Ethernet addresses. if forward_bpdu is false,
* the NORMAL action will drop these frames. */
void
if (ofproto->ofproto_class->forward_bpdu_changed) {
ofproto->ofproto_class->forward_bpdu_changed(ofproto);
}
- }
+ }
}
void
ofproto->ofproto_class->flush(ofproto);
}
- group = ofopgroup_create(ofproto);
+ group = ofopgroup_create_unattached(ofproto);
OFPROTO_FOR_EACH_TABLE (table, ofproto) {
struct rule *rule, *next_rule;
struct cls_cursor cursor;
struct classifier *table;
assert(list_is_empty(&ofproto->pending));
+ assert(!ofproto->n_pending);
connmgr_destroy(ofproto->connmgr);
}
}
+/* Executes the flow modification specified in 'fm'. Returns 0 on success, an
+ * OpenFlow error code as encoded by ofp_mkerr() on failure, or
+ * OFPROTO_POSTPONE if the operation cannot be initiated now but may be retried
+ * later.
+ *
+ * This is a helper function for in-band control and fail-open. */
+int
+ofproto_flow_mod(struct ofproto *ofproto, const struct ofputil_flow_mod *fm)
+{
+ return handle_flow_mod__(ofproto, NULL, fm, NULL);
+}
+
/* Searches for a rule with matching criteria exactly equal to 'target' in
* ofproto's table 0 and, if it finds one, deletes it.
*
return false;
} else {
/* Initiate deletion -> success. */
- struct ofopgroup *group = ofopgroup_create(ofproto);
+ struct ofopgroup *group = ofopgroup_create_unattached(ofproto);
ofoperation_create(group, rule, OFOPERATION_DELETE);
classifier_remove(&ofproto->tables[rule->table_id], &rule->cr);
rule->ofproto->ofproto_class->rule_destruct(rule);
{
const char *netdev_name = netdev_get_name(netdev);
struct ofport *ofport;
+ int dev_mtu;
int error;
/* Create ofport. */
hmap_insert(&p->ports, &ofport->hmap_node, hash_int(ofport->ofp_port, 0));
shash_add(&p->port_by_name, netdev_name, ofport);
+ if (!netdev_get_mtu(netdev, &dev_mtu)) {
+ set_internal_devs_mtu(p);
+ ofport->mtu = dev_mtu;
+ } else {
+ ofport->mtu = 0;
+ }
+
/* Let the ofproto_class initialize its private data. */
error = p->ofproto_class->port_construct(ofport);
if (error) {
port = ofproto_get_port(ofproto, ofproto_port.ofp_port);
if (port && !strcmp(netdev_get_name(port->netdev), name)) {
struct netdev *old_netdev = port->netdev;
+ int dev_mtu;
/* 'name' hasn't changed location. Any properties changed? */
if (!ofport_equal(&port->opp, &opp)) {
ofport_modified(port, &opp);
}
+ /* If this is a non-internal port and the MTU changed, check
+ * if the datapath's MTU needs to be updated. */
+ if (strcmp(netdev_get_type(netdev), "internal")
+ && !netdev_get_mtu(netdev, &dev_mtu)
+ && port->mtu != dev_mtu) {
+ set_internal_devs_mtu(ofproto);
+ port->mtu = dev_mtu;
+ }
+
/* Install the newly opened netdev in case it has changed.
* Don't close the old netdev yet in case port_modified has to
* remove a retained reference to it.*/
return 0;
}
+
+/* Find the minimum MTU of all non-datapath devices attached to 'p'.
+ * Returns ETH_PAYLOAD_MAX or the minimum of the ports. */
+static int
+find_min_mtu(struct ofproto *p)
+{
+ struct ofport *ofport;
+ int mtu = 0;
+
+ HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
+ struct netdev *netdev = ofport->netdev;
+ int dev_mtu;
+
+ /* Skip any internal ports, since that's what we're trying to
+ * set. */
+ if (!strcmp(netdev_get_type(netdev), "internal")) {
+ continue;
+ }
+
+ if (netdev_get_mtu(netdev, &dev_mtu)) {
+ continue;
+ }
+ if (!mtu || dev_mtu < mtu) {
+ mtu = dev_mtu;
+ }
+ }
+
+ return mtu ? mtu: ETH_PAYLOAD_MAX;
+}
+
+/* Set the MTU of all datapath devices on 'p' to the minimum of the
+ * non-datapath ports. */
+static void
+set_internal_devs_mtu(struct ofproto *p)
+{
+ struct ofport *ofport;
+ int mtu = find_min_mtu(p);
+
+ HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
+ struct netdev *netdev = ofport->netdev;
+
+ if (!strcmp(netdev_get_type(netdev), "internal")) {
+ netdev_set_mtu(netdev, mtu);
+ }
+ }
+}
\f
static void
ofproto_rule_destroy__(struct rule *rule)
struct ofpbuf request;
struct flow flow;
size_t n_ofp_actions;
- uint16_t in_port;
int error;
COVERAGE_INC(ofproto_packet_out);
/* Get payload. */
if (opo->buffer_id != htonl(UINT32_MAX)) {
error = ofconn_pktbuf_retrieve(ofconn, ntohl(opo->buffer_id),
- &buffer, &in_port);
+ &buffer, NULL);
if (error || !buffer) {
return error;
}
const struct ofp_stats_msg *osm)
{
struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
- struct flow_stats_request fsr;
+ struct ofputil_flow_stats_request fsr;
struct list replies;
struct list rules;
struct rule *rule;
: -1);
}
+/* Gets the MPIDs of the remote maintenance points broadcasting to 'ofp_port'
+ * within 'ofproto'. Populates 'rmps' with an array of MPIDs owned by
+ * 'ofproto', and 'n_rmps' with the number of MPIDs in 'rmps'. Returns a
+ * number less than 0 if CFM is not enabled on 'ofp_port'. */
+int
+ofproto_port_get_cfm_remote_mpids(const struct ofproto *ofproto,
+ uint16_t ofp_port, const uint64_t **rmps,
+ size_t *n_rmps)
+{
+ struct ofport *ofport = ofproto_get_port(ofproto, ofp_port);
+
+ *rmps = NULL;
+ *n_rmps = 0;
+ return (ofport && ofproto->ofproto_class->get_cfm_remote_mpids
+ ? ofproto->ofproto_class->get_cfm_remote_mpids(ofport, rmps,
+ n_rmps)
+ : -1);
+}
+
static int
handle_aggregate_stats_request(struct ofconn *ofconn,
const struct ofp_stats_msg *osm)
{
struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
- struct flow_stats_request request;
+ struct ofputil_flow_stats_request request;
struct ofputil_aggregate_stats stats;
bool unknown_packets, unknown_bytes;
struct ofpbuf *reply;
* in which no matching flow already exists in the flow table.
*
* Adds the flow specified by 'ofm', which is followed by 'n_actions'
- * ofp_actions, to the ofproto's flow table. Returns 0 on success or an
- * OpenFlow error code as encoded by ofp_mkerr() on failure.
+ * ofp_actions, to the ofproto's flow table. Returns 0 on success, an OpenFlow
+ * error code as encoded by ofp_mkerr() on failure, or OFPROTO_POSTPONE if the
+ * operation cannot be initiated now but may be retried later.
*
* 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
* if any. */
static int
add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
- struct ofputil_flow_mod *fm, const struct ofp_header *request)
+ const struct ofputil_flow_mod *fm, const struct ofp_header *request)
{
struct classifier *table;
struct ofopgroup *group;
rule->cr = fm->cr;
rule->pending = NULL;
rule->flow_cookie = fm->cookie;
- rule->created = time_msec();
+ rule->created = rule->modified = time_msec();
rule->idle_timeout = fm->idle_timeout;
rule->hard_timeout = fm->hard_timeout;
rule->table_id = table - ofproto->tables;
if (victim && victim->pending) {
error = OFPROTO_POSTPONE;
} else {
- group = (ofconn
- ? ofopgroup_create_for_ofconn(ofconn, request, fm->buffer_id)
- : ofopgroup_create(ofproto));
+ group = ofopgroup_create(ofproto, ofconn, request, fm->buffer_id);
ofoperation_create(group, rule, OFOPERATION_ADD);
rule->pending->victim = victim;
*
* Returns 0 on success, otherwise an OpenFlow error code. */
static int
-modify_flows__(struct ofconn *ofconn, const struct ofputil_flow_mod *fm,
+modify_flows__(struct ofproto *ofproto, struct ofconn *ofconn,
+ const struct ofputil_flow_mod *fm,
const struct ofp_header *request, struct list *rules)
{
struct ofopgroup *group;
struct rule *rule;
- group = ofopgroup_create_for_ofconn(ofconn, request, fm->buffer_id);
+ group = ofopgroup_create(ofproto, ofconn, request, fm->buffer_id);
LIST_FOR_EACH (rule, ofproto_node, rules) {
if (!ofputil_actions_equal(fm->actions, fm->n_actions,
rule->actions, rule->n_actions)) {
rule->actions = ofputil_actions_clone(fm->actions, fm->n_actions);
rule->n_actions = fm->n_actions;
rule->ofproto->ofproto_class->rule_modify_actions(rule);
+ } else {
+ rule->modified = time_msec();
}
rule->flow_cookie = fm->cookie;
}
* 'ofconn' is used to retrieve the packet buffer specified in fm->buffer_id,
* if any. */
static int
-modify_flows_loose(struct ofconn *ofconn, struct ofputil_flow_mod *fm,
+modify_flows_loose(struct ofproto *ofproto, struct ofconn *ofconn,
+ const struct ofputil_flow_mod *fm,
const struct ofp_header *request)
{
- struct ofproto *p = ofconn_get_ofproto(ofconn);
struct list rules;
int error;
- error = collect_rules_loose(p, fm->table_id, &fm->cr, OFPP_NONE, &rules);
+ error = collect_rules_loose(ofproto, fm->table_id, &fm->cr, OFPP_NONE,
+ &rules);
return (error ? error
- : list_is_empty(&rules) ? add_flow(p, ofconn, fm, request)
- : modify_flows__(ofconn, fm, request, &rules));
+ : list_is_empty(&rules) ? add_flow(ofproto, ofconn, fm, request)
+ : modify_flows__(ofproto, ofconn, fm, request, &rules));
}
/* Implements OFPFC_MODIFY_STRICT. Returns 0 on success or an OpenFlow error
* 'ofconn' is used to retrieve the packet buffer specified in fm->buffer_id,
* if any. */
static int
-modify_flow_strict(struct ofconn *ofconn, struct ofputil_flow_mod *fm,
+modify_flow_strict(struct ofproto *ofproto, struct ofconn *ofconn,
+ const struct ofputil_flow_mod *fm,
const struct ofp_header *request)
{
- struct ofproto *p = ofconn_get_ofproto(ofconn);
struct list rules;
int error;
- error = collect_rules_strict(p, fm->table_id, &fm->cr, OFPP_NONE, &rules);
+ error = collect_rules_strict(ofproto, fm->table_id, &fm->cr, OFPP_NONE,
+ &rules);
return (error ? error
- : list_is_empty(&rules) ? add_flow(p, ofconn, fm, request)
- : list_is_singleton(&rules) ? modify_flows__(ofconn, fm, request,
- &rules)
+ : list_is_empty(&rules) ? add_flow(ofproto, ofconn, fm, request)
+ : list_is_singleton(&rules) ? modify_flows__(ofproto, ofconn,
+ fm, request, &rules)
: 0);
}
\f
*
* Returns 0 on success, otherwise an OpenFlow error code. */
static int
-delete_flows__(struct ofconn *ofconn, const struct ofp_header *request,
- struct list *rules)
+delete_flows__(struct ofproto *ofproto, struct ofconn *ofconn,
+ const struct ofp_header *request, struct list *rules)
{
- struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
struct rule *rule, *next;
struct ofopgroup *group;
- group = ofopgroup_create_for_ofconn(ofconn, request, UINT32_MAX);
+ group = ofopgroup_create(ofproto, ofconn, request, UINT32_MAX);
LIST_FOR_EACH_SAFE (rule, next, ofproto_node, rules) {
ofproto_rule_send_removed(rule, OFPRR_DELETE);
/* Implements OFPFC_DELETE. */
static int
-delete_flows_loose(struct ofconn *ofconn, const struct ofputil_flow_mod *fm,
+delete_flows_loose(struct ofproto *ofproto, struct ofconn *ofconn,
+ const struct ofputil_flow_mod *fm,
const struct ofp_header *request)
{
- struct ofproto *p = ofconn_get_ofproto(ofconn);
struct list rules;
int error;
- error = collect_rules_loose(p, fm->table_id, &fm->cr, fm->out_port,
+ error = collect_rules_loose(ofproto, fm->table_id, &fm->cr, fm->out_port,
&rules);
return (error ? error
- : !list_is_empty(&rules) ? delete_flows__(ofconn, request, &rules)
+ : !list_is_empty(&rules) ? delete_flows__(ofproto, ofconn, request,
+ &rules)
: 0);
}
/* Implements OFPFC_DELETE_STRICT. */
static int
-delete_flow_strict(struct ofconn *ofconn, struct ofputil_flow_mod *fm,
+delete_flow_strict(struct ofproto *ofproto, struct ofconn *ofconn,
+ const struct ofputil_flow_mod *fm,
const struct ofp_header *request)
{
- struct ofproto *p = ofconn_get_ofproto(ofconn);
struct list rules;
int error;
- error = collect_rules_strict(p, fm->table_id, &fm->cr, fm->out_port,
+ error = collect_rules_strict(ofproto, fm->table_id, &fm->cr, fm->out_port,
&rules);
return (error ? error
- : list_is_singleton(&rules) ? delete_flows__(ofconn, request,
- &rules)
+ : list_is_singleton(&rules) ? delete_flows__(ofproto, ofconn,
+ request, &rules)
: 0);
}
ofproto_rule_send_removed(rule, reason);
- group = ofopgroup_create(ofproto);
+ group = ofopgroup_create_unattached(ofproto);
ofoperation_create(group, rule, OFOPERATION_DELETE);
classifier_remove(&ofproto->tables[rule->table_id], &rule->cr);
rule->ofproto->ofproto_class->rule_destruct(rule);
static int
handle_flow_mod(struct ofconn *ofconn, const struct ofp_header *oh)
{
- struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
struct ofputil_flow_mod fm;
int error;
return error;
}
- if (list_size(&ofproto->pending) >= 50) {
- return OFPROTO_POSTPONE;
- }
-
error = ofputil_decode_flow_mod(&fm, oh,
ofconn_get_flow_mod_table_id(ofconn));
if (error) {
return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_ALL_TABLES_FULL);
}
- switch (fm.command) {
+ return handle_flow_mod__(ofconn_get_ofproto(ofconn), ofconn, &fm, oh);
+}
+
+static int
+handle_flow_mod__(struct ofproto *ofproto, struct ofconn *ofconn,
+ const struct ofputil_flow_mod *fm,
+ const struct ofp_header *oh)
+{
+ if (ofproto->n_pending >= 50) {
+ assert(!list_is_empty(&ofproto->pending));
+ return OFPROTO_POSTPONE;
+ }
+
+ switch (fm->command) {
case OFPFC_ADD:
- return add_flow(ofproto, ofconn, &fm, oh);
+ return add_flow(ofproto, ofconn, fm, oh);
case OFPFC_MODIFY:
- return modify_flows_loose(ofconn, &fm, oh);
+ return modify_flows_loose(ofproto, ofconn, fm, oh);
case OFPFC_MODIFY_STRICT:
- return modify_flow_strict(ofconn, &fm, oh);
+ return modify_flow_strict(ofproto, ofconn, fm, oh);
case OFPFC_DELETE:
- return delete_flows_loose(ofconn, &fm, oh);
+ return delete_flows_loose(ofproto, ofconn, fm, oh);
case OFPFC_DELETE_STRICT:
- return delete_flow_strict(ofconn, &fm, oh);
+ return delete_flow_strict(ofproto, ofconn, fm, oh);
default:
- if (fm.command > 0xff) {
+ if (fm->command > 0xff) {
VLOG_WARN_RL(&rl, "flow_mod has explicit table_id but "
"flow_mod_table_id extension is not enabled");
}
* The caller should add operations to the returned group with
* ofoperation_create() and then submit it with ofopgroup_submit(). */
static struct ofopgroup *
-ofopgroup_create(struct ofproto *ofproto)
+ofopgroup_create_unattached(struct ofproto *ofproto)
{
struct ofopgroup *group = xzalloc(sizeof *group);
group->ofproto = ofproto;
return group;
}
-/* Creates and returns a new ofopgroup that is associated with 'ofconn'. If
- * the ofopgroup eventually fails, then the error reply will include 'request'.
- * If the ofopgroup eventually succeeds, then the packet with buffer id
- * 'buffer_id' on 'ofconn' will be sent by 'ofconn''s ofproto.
+/* Creates and returns a new ofopgroup for 'ofproto'.
+ *
+ * If 'ofconn' is NULL, the new ofopgroup is not associated with any OpenFlow
+ * connection. The 'request' and 'buffer_id' arguments are ignored.
+ *
+ * If 'ofconn' is nonnull, then the new ofopgroup is associated with 'ofconn'.
+ * If the ofopgroup eventually fails, then the error reply will include
+ * 'request'. If the ofopgroup eventually succeeds, then the packet with
+ * buffer id 'buffer_id' on 'ofconn' will be sent by 'ofconn''s ofproto.
*
* The caller should add operations to the returned group with
* ofoperation_create() and then submit it with ofopgroup_submit(). */
static struct ofopgroup *
-ofopgroup_create_for_ofconn(struct ofconn *ofconn,
- const struct ofp_header *request,
- uint32_t buffer_id)
+ofopgroup_create(struct ofproto *ofproto, struct ofconn *ofconn,
+ const struct ofp_header *request, uint32_t buffer_id)
{
- struct ofopgroup *group = ofopgroup_create(ofconn_get_ofproto(ofconn));
- size_t request_len = ntohs(request->length);
+ struct ofopgroup *group = ofopgroup_create_unattached(ofproto);
+ if (ofconn) {
+ size_t request_len = ntohs(request->length);
- ofconn_add_opgroup(ofconn, &group->ofconn_node);
- group->ofconn = ofconn;
- group->request = xmemdup(request, MIN(request_len, 64));
- group->buffer_id = buffer_id;
+ assert(ofconn_get_ofproto(ofconn) == ofproto);
+ ofconn_add_opgroup(ofconn, &group->ofconn_node);
+ group->ofconn = ofconn;
+ group->request = xmemdup(request, MIN(request_len, 64));
+ group->buffer_id = buffer_id;
+ }
return group;
}
ofopgroup_destroy(group);
} else {
list_push_back(&group->ofproto->pending, &group->ofproto_node);
+ group->ofproto->n_pending++;
}
}
{
assert(list_is_empty(&group->ops));
if (!list_is_empty(&group->ofproto_node)) {
+ assert(group->ofproto->n_pending > 0);
+ group->ofproto->n_pending--;
list_remove(&group->ofproto_node);
}
if (!list_is_empty(&group->ofconn_node)) {
* indicate success or an OpenFlow error code (constructed with
* e.g. ofp_mkerr()).
*
- * If 'op' is a "delete flow" operation, 'error' must be 0. That is, flow
- * deletions are not allowed to fail.
+ * If 'error' is 0, indicating success, the operation will be committed
+ * permanently to the flow table. There is one interesting subcase:
+ *
+ * - If 'op' is an "add flow" operation that is replacing an existing rule in
+ * the flow table (the "victim" rule) by a new one, then the caller must
+ * have uninitialized any derived state in the victim rule, as in step 5 in
+ * the "Life Cycle" in ofproto/ofproto-provider.h. ofoperation_complete()
+ * performs steps 6 and 7 for the victim rule, most notably by calling its
+ * ->rule_dealloc() function.
+ *
+ * If 'error' is nonzero, then generally the operation will be rolled back:
+ *
+ * - If 'op' is an "add flow" operation, ofproto removes the new rule or
+ * restores the original rule. The caller must have uninitialized any
+ * derived state in the new rule, as in step 5 of in the "Life Cycle" in
+ * ofproto/ofproto-provider.h. ofoperation_complete() performs steps 6 and
+ * and 7 for the new rule, calling its ->rule_dealloc() function.
+ *
+ * - If 'op' is a "modify flow" operation, ofproto restores the original
+ * actions.
+ *
+ * - 'op' must not be a "delete flow" operation. Removing a rule is not
+ * allowed to fail. It must always succeed.
*
* Please see the large comment in ofproto/ofproto-provider.h titled
* "Asynchronous Operation Support" for more information. */
break;
case OFOPERATION_MODIFY:
- if (error) {
+ if (!error) {
+ rule->modified = time_msec();
+ } else {
free(rule->actions);
rule->actions = op->actions;
rule->n_actions = op->n_actions;
git://git.onelab.eu / sliver-openvswitch.git / blobdiff