/*
- * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
&dpif_linux_class,
#endif
&dpif_netdev_class,
+ &dpif_planetlab_class,
};
struct registered_dpif_class {
static void log_operation(const struct dpif *, const char *operation,
int error);
static bool should_log_flow_message(int error);
+static void log_flow_put_message(struct dpif *, const struct dpif_flow_put *,
+ int error);
+static void log_flow_del_message(struct dpif *, const struct dpif_flow_del *,
+ int error);
+static void log_execute_message(struct dpif *, const struct dpif_execute *,
+ int error);
static void
dp_initialize(void)
return error;
}
-/* Attempts to add 'netdev' as a port on 'dpif'. If successful, returns 0 and
- * sets '*port_nop' to the new port's port number (if 'port_nop' is non-null).
- * On failure, returns a positive errno value and sets '*port_nop' to
- * UINT16_MAX (if 'port_nop' is non-null). */
+/* Attempts to add 'netdev' as a port on 'dpif'. If 'port_nop' is
+ * non-null and its value is not UINT16_MAX, then attempts to use the
+ * value as the port number.
+ *
+ * If successful, returns 0 and sets '*port_nop' to the new port's port
+ * number (if 'port_nop' is non-null). On failure, returns a positive
+ * errno value and sets '*port_nop' to UINT16_MAX (if 'port_nop' is
+ * non-null). */
int
dpif_port_add(struct dpif *dpif, struct netdev *netdev, uint16_t *port_nop)
{
const char *netdev_name = netdev_get_name(netdev);
- uint16_t port_no;
+ uint16_t port_no = UINT16_MAX;
int error;
COVERAGE_INC(dpif_port_add);
+ if (port_nop) {
+ port_no = *port_nop;
+ }
+
error = dpif->dpif_class->port_add(dpif, netdev, &port_no);
if (!error) {
VLOG_DBG_RL(&dpmsg_rl, "%s: added %s as port %"PRIu16,
* as the OVS_USERSPACE_ATTR_PID attribute's value, for use in flows whose
* packets arrived on port 'port_no'.
*
+ * A 'port_no' of UINT16_MAX is a special case: it returns a reserved PID, not
+ * allocated to any port, that the client may use for special purposes.
+ *
* The return value is only meaningful when DPIF_UC_ACTION has been enabled in
* the 'dpif''s listen mask. It is allowed to change when DPIF_UC_ACTION is
* disabled and then re-enabled, so a client that does that must be prepared to
/* Extracts the flow stats for a packet. The 'flow' and 'packet'
* arguments must have been initialized through a call to flow_extract().
- */
+ * 'used' is stored into stats->used. */
void
-dpif_flow_stats_extract(const struct flow *flow, struct ofpbuf *packet,
- struct dpif_flow_stats *stats)
+dpif_flow_stats_extract(const struct flow *flow, const struct ofpbuf *packet,
+ long long int used, struct dpif_flow_stats *stats)
{
- memset(stats, 0, sizeof(*stats));
-
- if ((flow->dl_type == htons(ETH_TYPE_IP)) && packet->l4) {
- if ((flow->nw_proto == IPPROTO_TCP) && packet->l7) {
- struct tcp_header *tcp = packet->l4;
- stats->tcp_flags = TCP_FLAGS(tcp->tcp_ctl);
- }
- }
-
+ stats->tcp_flags = packet_get_tcp_flags(packet, flow);
stats->n_bytes = packet->size;
stats->n_packets = 1;
+ stats->used = used;
}
/* Appends a human-readable representation of 'stats' to 's'. */
} else {
ds_put_format(s, "never");
}
- /* XXX tcp_flags? */
+ if (stats->tcp_flags) {
+ ds_put_cstr(s, ", flags:");
+ packet_format_tcp_flags(s, stats->tcp_flags);
+ }
}
/* Deletes all flows from 'dpif'. Returns 0 if successful, otherwise a
return error;
}
+static int
+dpif_flow_put__(struct dpif *dpif, const struct dpif_flow_put *put)
+{
+ int error;
+
+ COVERAGE_INC(dpif_flow_put);
+ assert(!(put->flags & ~(DPIF_FP_CREATE | DPIF_FP_MODIFY
+ | DPIF_FP_ZERO_STATS)));
+
+ error = dpif->dpif_class->flow_put(dpif, put);
+ if (error && put->stats) {
+ memset(put->stats, 0, sizeof *put->stats);
+ }
+ log_flow_put_message(dpif, put, error);
+ return error;
+}
+
/* Adds or modifies a flow in 'dpif'. The flow is specified by the Netlink
* attributes with types OVS_KEY_ATTR_* in the 'key_len' bytes starting at
* 'key'. The associated actions are specified by the Netlink attributes with
const struct nlattr *actions, size_t actions_len,
struct dpif_flow_stats *stats)
{
- int error;
+ struct dpif_flow_put put;
+
+ put.flags = flags;
+ put.key = key;
+ put.key_len = key_len;
+ put.actions = actions;
+ put.actions_len = actions_len;
+ put.stats = stats;
+ return dpif_flow_put__(dpif, &put);
+}
- COVERAGE_INC(dpif_flow_put);
- assert(!(flags & ~(DPIF_FP_CREATE | DPIF_FP_MODIFY | DPIF_FP_ZERO_STATS)));
+static int
+dpif_flow_del__(struct dpif *dpif, struct dpif_flow_del *del)
+{
+ int error;
- error = dpif->dpif_class->flow_put(dpif, flags, key, key_len,
- actions, actions_len, stats);
- if (error && stats) {
- memset(stats, 0, sizeof *stats);
- }
- if (should_log_flow_message(error)) {
- struct ds s;
+ COVERAGE_INC(dpif_flow_del);
- ds_init(&s);
- ds_put_cstr(&s, "put");
- if (flags & DPIF_FP_CREATE) {
- ds_put_cstr(&s, "[create]");
- }
- if (flags & DPIF_FP_MODIFY) {
- ds_put_cstr(&s, "[modify]");
- }
- if (flags & DPIF_FP_ZERO_STATS) {
- ds_put_cstr(&s, "[zero]");
- }
- log_flow_message(dpif, error, ds_cstr(&s), key, key_len, stats,
- actions, actions_len);
- ds_destroy(&s);
+ error = dpif->dpif_class->flow_del(dpif, del);
+ if (error && del->stats) {
+ memset(del->stats, 0, sizeof *del->stats);
}
+ log_flow_del_message(dpif, del, error);
return error;
}
const struct nlattr *key, size_t key_len,
struct dpif_flow_stats *stats)
{
- int error;
-
- COVERAGE_INC(dpif_flow_del);
+ struct dpif_flow_del del;
- error = dpif->dpif_class->flow_del(dpif, key, key_len, stats);
- if (error && stats) {
- memset(stats, 0, sizeof *stats);
- }
- if (should_log_flow_message(error)) {
- log_flow_message(dpif, error, "flow_del", key, key_len,
- !error ? stats : NULL, NULL, 0);
- }
- return error;
+ del.key = key;
+ del.key_len = key_len;
+ del.stats = stats;
+ return dpif_flow_del__(dpif, &del);
}
/* Initializes 'dump' to begin dumping the flows in a dpif.
return dump->error == EOF ? 0 : dump->error;
}
+static int
+dpif_execute__(struct dpif *dpif, const struct dpif_execute *execute)
+{
+ int error;
+
+ COVERAGE_INC(dpif_execute);
+ if (execute->actions_len > 0) {
+ error = dpif->dpif_class->execute(dpif, execute);
+ } else {
+ error = 0;
+ }
+
+ log_execute_message(dpif, execute, error);
+
+ return error;
+}
+
/* Causes 'dpif' to perform the 'actions_len' bytes of actions in 'actions' on
* the Ethernet frame specified in 'packet' taken from the flow specified in
* the 'key_len' bytes of 'key'. ('key' is mostly redundant with 'packet', but
const struct nlattr *actions, size_t actions_len,
const struct ofpbuf *buf)
{
- int error;
-
- COVERAGE_INC(dpif_execute);
- if (actions_len > 0) {
- error = dpif->dpif_class->execute(dpif, key, key_len,
- actions, actions_len, buf);
- } else {
- error = 0;
- }
-
- if (!(error ? VLOG_DROP_WARN(&error_rl) : VLOG_DROP_DBG(&dpmsg_rl))) {
- struct ds ds = DS_EMPTY_INITIALIZER;
- char *packet = ofp_packet_to_string(buf->data, buf->size);
- ds_put_format(&ds, "%s: execute ", dpif_name(dpif));
- format_odp_actions(&ds, actions, actions_len);
- if (error) {
- ds_put_format(&ds, " failed (%s)", strerror(error));
- }
- ds_put_format(&ds, " on packet %s", packet);
- vlog(THIS_MODULE, error ? VLL_WARN : VLL_DBG, "%s", ds_cstr(&ds));
- ds_destroy(&ds);
- free(packet);
- }
- return error;
+ struct dpif_execute execute;
+
+ execute.key = key;
+ execute.key_len = key_len;
+ execute.actions = actions;
+ execute.actions_len = actions_len;
+ execute.packet = buf;
+ return dpif_execute__(dpif, &execute);
}
/* Executes each of the 'n_ops' operations in 'ops' on 'dpif', in the order in
* This function exists because some datapaths can perform batched operations
* faster than individual operations. */
void
-dpif_operate(struct dpif *dpif, union dpif_op **ops, size_t n_ops)
+dpif_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops)
{
size_t i;
if (dpif->dpif_class->operate) {
dpif->dpif_class->operate(dpif, ops, n_ops);
+
+ for (i = 0; i < n_ops; i++) {
+ struct dpif_op *op = ops[i];
+
+ switch (op->type) {
+ case DPIF_OP_FLOW_PUT:
+ log_flow_put_message(dpif, &op->u.flow_put, op->error);
+ break;
+
+ case DPIF_OP_FLOW_DEL:
+ log_flow_del_message(dpif, &op->u.flow_del, op->error);
+ break;
+
+ case DPIF_OP_EXECUTE:
+ log_execute_message(dpif, &op->u.execute, op->error);
+ break;
+ }
+ }
return;
}
for (i = 0; i < n_ops; i++) {
- union dpif_op *op = ops[i];
- struct dpif_flow_put *put;
- struct dpif_execute *execute;
+ struct dpif_op *op = ops[i];
switch (op->type) {
case DPIF_OP_FLOW_PUT:
- put = &op->flow_put;
- put->error = dpif_flow_put(dpif, put->flags,
- put->key, put->key_len,
- put->actions, put->actions_len,
- put->stats);
+ op->error = dpif_flow_put__(dpif, &op->u.flow_put);
+ break;
+
+ case DPIF_OP_FLOW_DEL:
+ op->error = dpif_flow_del__(dpif, &op->u.flow_del);
break;
case DPIF_OP_EXECUTE:
- execute = &op->execute;
- execute->error = dpif_execute(dpif, execute->key, execute->key_len,
- execute->actions,
- execute->actions_len,
- execute->packet);
+ op->error = dpif_execute__(dpif, &op->u.execute);
break;
default:
}
}
-static bool OVS_UNUSED
-is_valid_listen_mask(int listen_mask)
-{
- return !(listen_mask & ~((1u << DPIF_UC_MISS) |
- (1u << DPIF_UC_ACTION)));
-}
-
-/* Retrieves 'dpif''s "listen mask" into '*listen_mask'. A 1-bit of value 2**X
- * set in '*listen_mask' indicates that dpif_recv() will receive messages of
- * the type (from "enum dpif_upcall_type") with value X. Returns 0 if
- * successful, otherwise a positive errno value. */
-int
-dpif_recv_get_mask(const struct dpif *dpif, int *listen_mask)
-{
- int error = dpif->dpif_class->recv_get_mask(dpif, listen_mask);
- if (error) {
- *listen_mask = 0;
- }
- assert(is_valid_listen_mask(*listen_mask));
- log_operation(dpif, "recv_get_mask", error);
- return error;
-}
-
-/* Sets 'dpif''s "listen mask" to 'listen_mask'. A 1-bit of value 2**X set in
- * '*listen_mask' requests that dpif_recv() will receive messages of the type
- * (from "enum dpif_upcall_type") with value X. Returns 0 if successful,
- * otherwise a positive errno value.
+/* Enables or disables receiving packets with dpif_recv() on 'dpif'. Returns 0
+ * if successful, otherwise a positive errno value.
*
- * Turning DPIF_UC_ACTION off and then back on may change the Netlink PID
+ * Turning packet receive off and then back on may change the Netlink PID
* assignments returned by dpif_port_get_pid(). If the client does this, it
* must update all of the flows that have OVS_ACTION_ATTR_USERSPACE actions
* using the new PID assignment. */
int
-dpif_recv_set_mask(struct dpif *dpif, int listen_mask)
+dpif_recv_set(struct dpif *dpif, bool enable)
{
- int error;
-
- assert(is_valid_listen_mask(listen_mask));
-
- error = dpif->dpif_class->recv_set_mask(dpif, listen_mask);
- log_operation(dpif, "recv_set_mask", error);
+ int error = dpif->dpif_class->recv_set(dpif, enable);
+ log_operation(dpif, "recv_set", error);
return error;
}
/* Polls for an upcall from 'dpif'. If successful, stores the upcall into
- * '*upcall'. Only upcalls of the types selected with dpif_recv_set_mask()
- * member function will ordinarily be received (but if a message type is
- * enabled and then later disabled, some stragglers might pop up).
+ * '*upcall', using 'buf' for storage. Should only be called if
+ * dpif_recv_set() has been used to enable receiving packets on 'dpif'.
*
- * The caller takes ownership of the data that 'upcall' points to.
- * 'upcall->key' and 'upcall->actions' (if nonnull) point into data owned by
- * 'upcall->packet', so their memory cannot be freed separately. (This is
+ * 'upcall->packet' and 'upcall->key' point into data in the caller-provided
+ * 'buf', so their memory cannot be freed separately from 'buf'. (This is
* hardly a great way to do things but it works out OK for the dpif providers
* and clients that exist so far.)
*
* Returns 0 if successful, otherwise a positive errno value. Returns EAGAIN
* if no upcall is immediately available. */
int
-dpif_recv(struct dpif *dpif, struct dpif_upcall *upcall)
+dpif_recv(struct dpif *dpif, struct dpif_upcall *upcall, struct ofpbuf *buf)
{
- int error = dpif->dpif_class->recv(dpif, upcall);
+ int error = dpif->dpif_class->recv(dpif, upcall, buf);
if (!error && !VLOG_DROP_DBG(&dpmsg_rl)) {
struct ds flow;
char *packet;
vlog(THIS_MODULE, flow_message_log_level(error), "%s", ds_cstr(&ds));
ds_destroy(&ds);
}
+
+static void
+log_flow_put_message(struct dpif *dpif, const struct dpif_flow_put *put,
+ int error)
+{
+ if (should_log_flow_message(error)) {
+ struct ds s;
+
+ ds_init(&s);
+ ds_put_cstr(&s, "put");
+ if (put->flags & DPIF_FP_CREATE) {
+ ds_put_cstr(&s, "[create]");
+ }
+ if (put->flags & DPIF_FP_MODIFY) {
+ ds_put_cstr(&s, "[modify]");
+ }
+ if (put->flags & DPIF_FP_ZERO_STATS) {
+ ds_put_cstr(&s, "[zero]");
+ }
+ log_flow_message(dpif, error, ds_cstr(&s),
+ put->key, put->key_len, put->stats,
+ put->actions, put->actions_len);
+ ds_destroy(&s);
+ }
+}
+
+static void
+log_flow_del_message(struct dpif *dpif, const struct dpif_flow_del *del,
+ int error)
+{
+ if (should_log_flow_message(error)) {
+ log_flow_message(dpif, error, "flow_del", del->key, del->key_len,
+ !error ? del->stats : NULL, NULL, 0);
+ }
+}
+
+static void
+log_execute_message(struct dpif *dpif, const struct dpif_execute *execute,
+ int error)
+{
+ if (!(error ? VLOG_DROP_WARN(&error_rl) : VLOG_DROP_DBG(&dpmsg_rl))) {
+ struct ds ds = DS_EMPTY_INITIALIZER;
+ char *packet;
+
+ packet = ofp_packet_to_string(execute->packet->data,
+ execute->packet->size);
+ ds_put_format(&ds, "%s: execute ", dpif_name(dpif));
+ format_odp_actions(&ds, execute->actions, execute->actions_len);
+ if (error) {
+ ds_put_format(&ds, " failed (%s)", strerror(error));
+ }
+ ds_put_format(&ds, " on packet %s", packet);
+ vlog(THIS_MODULE, error ? VLL_WARN : VLL_DBG, "%s", ds_cstr(&ds));
+ ds_destroy(&ds);
+ free(packet);
+ }
+}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff