#include "coverage.h"
#include "dynamic-string.h"
#include "flow.h"
+#include "netdev.h"
#include "netlink.h"
#include "odp-util.h"
#include "ofp-print.h"
VLOG_DEFINE_THIS_MODULE(dpif);
+COVERAGE_DEFINE(dpif_destroy);
+COVERAGE_DEFINE(dpif_port_add);
+COVERAGE_DEFINE(dpif_port_del);
+COVERAGE_DEFINE(dpif_flow_flush);
+COVERAGE_DEFINE(dpif_flow_get);
+COVERAGE_DEFINE(dpif_flow_put);
+COVERAGE_DEFINE(dpif_flow_del);
+COVERAGE_DEFINE(dpif_flow_query_list);
+COVERAGE_DEFINE(dpif_flow_query_list_n);
+COVERAGE_DEFINE(dpif_execute);
+COVERAGE_DEFINE(dpif_purge);
+
static const struct dpif_class *base_dpif_classes[] = {
#ifdef HAVE_NETLINK
&dpif_linux_class,
goto exit;
}
- error = registered_class->dpif_class->open(name, type, create, &dpif);
+ error = registered_class->dpif_class->open(registered_class->dpif_class,
+ name, create, &dpif);
if (!error) {
+ assert(dpif->dpif_class == registered_class->dpif_class);
registered_class->refcount++;
}
}
}
+
/* Destroys the datapath that 'dpif' is connected to, first removing all of its
* ports. After calling this function, it does not make sense to pass 'dpif'
* to any functions other than dpif_name() or dpif_close(). */
return error;
}
-/* Attempts to add 'devname' as a port on 'dpif', given the combination of
- * ODP_PORT_* flags in 'flags'. 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 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, const char *devname, uint16_t flags,
- uint16_t *port_nop)
+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;
int error;
COVERAGE_INC(dpif_port_add);
- error = dpif->dpif_class->port_add(dpif, devname, flags, &port_no);
+ error = dpif->dpif_class->port_add(dpif, netdev, &port_no);
if (!error) {
VLOG_DBG_RL(&dpmsg_rl, "%s: added %s as port %"PRIu16,
- dpif_name(dpif), devname, port_no);
+ dpif_name(dpif), netdev_name, port_no);
} else {
VLOG_WARN_RL(&error_rl, "%s: failed to add %s as port: %s",
- dpif_name(dpif), devname, strerror(error));
+ dpif_name(dpif), netdev_name, strerror(error));
port_no = UINT16_MAX;
}
if (port_nop) {
COVERAGE_INC(dpif_port_del);
error = dpif->dpif_class->port_del(dpif, port_no);
- log_operation(dpif, "port_del", error);
+ if (!error) {
+ VLOG_DBG_RL(&dpmsg_rl, "%s: port_del(%"PRIu16")",
+ dpif_name(dpif), port_no);
+ } else {
+ log_operation(dpif, "port_del", error);
+ }
return error;
}
/* Queries 'dpif' for a flow entry matching 'flow->key'.
*
* If a flow matching 'flow->key' exists in 'dpif', stores statistics for the
- * flow into 'flow->stats'. If 'flow->n_actions' is zero, then 'flow->actions'
- * is ignored. If 'flow->n_actions' is nonzero, then 'flow->actions' should
- * point to an array of the specified number of actions. At most that many of
- * the flow's actions will be copied into that array. 'flow->n_actions' will
- * be updated to the number of actions actually present in the flow, which may
- * be greater than the number stored if the flow has more actions than space
- * available in the array.
+ * flow into 'flow->stats'. If 'flow->actions_len' is zero, then
+ * 'flow->actions' is ignored. If 'flow->actions_len' is nonzero, then
+ * 'flow->actions' should point to an array of the specified number of bytes.
+ * At most that many bytes of the flow's actions will be copied into that
+ * array. 'flow->actions_len' will be updated to the number of bytes of
+ * actions actually present in the flow, which may be greater than the amount
+ * stored if the flow has more actions than space available in the array.
*
* If no flow matching 'flow->key' exists in 'dpif', returns ENOENT. On other
* failure, returns a positive errno value. */
if (error) {
/* Make the results predictable on error. */
memset(&flow->stats, 0, sizeof flow->stats);
- flow->n_actions = 0;
+ flow->actions_len = 0;
}
if (should_log_flow_message(error)) {
log_flow_operation(dpif, "flow_get", error, flow);
* Stores 0 into 'flow->stats.error' and stores statistics for the flow
* into 'flow->stats'.
*
- * If 'flow->n_actions' is zero, then 'flow->actions' is ignored. If
- * 'flow->n_actions' is nonzero, then 'flow->actions' should point to an
- * array of the specified number of actions. At most that many of the
- * flow's actions will be copied into that array. 'flow->n_actions' will
- * be updated to the number of actions actually present in the flow, which
- * may be greater than the number stored if the flow has more actions than
- * space available in the array.
+ * If 'flow->actions_len' is zero, then 'flow->actions' is ignored. If
+ * 'flow->actions_len' is nonzero, then 'flow->actions' should point to an
+ * array of the specified number of bytes. At most that amount of flow's
+ * actions will be copied into that array. 'flow->actions_len' will be
+ * updated to the number of bytes of actions actually present in the flow,
+ * which may be greater than the amount stored if the flow's actions are
+ * longer than the available space.
*
* - Flow-specific errors are indicated by a positive errno value in
* 'flow->stats.error'. In particular, ENOENT indicates that no flow
/* Deletes a flow matching 'flow->key' from 'dpif' or returns ENOENT if 'dpif'
* does not contain such a flow.
*
- * If successful, updates 'flow->stats', 'flow->n_actions', and 'flow->actions'
- * as described for dpif_flow_get(). */
+ * If successful, updates 'flow->stats', 'flow->actions_len', and
+ * 'flow->actions' as described for dpif_flow_get(). */
int
dpif_flow_del(struct dpif *dpif, struct odp_flow *flow)
{
return error;
}
-/* Stores up to 'n' flows in 'dpif' into 'flows', including their statistics
- * but not including any information about their actions. If successful,
- * returns 0 and sets '*n_out' to the number of flows actually present in
- * 'dpif', which might be greater than the number stored (if 'dpif' has more
- * than 'n' flows). On failure, returns a negative errno value and sets
- * '*n_out' to 0. */
-int
-dpif_flow_list(const struct dpif *dpif, struct odp_flow flows[], size_t n,
- size_t *n_out)
+/* Initializes 'dump' to begin dumping the flows in a dpif.
+ *
+ * This function provides no status indication. An error status for the entire
+ * dump operation is provided when it is completed by calling
+ * dpif_flow_dump_done().
+ */
+void
+dpif_flow_dump_start(struct dpif_flow_dump *dump, const struct dpif *dpif)
{
- uint32_t i;
- int retval;
-
- COVERAGE_INC(dpif_flow_query_list);
- if (RUNNING_ON_VALGRIND) {
- memset(flows, 0, n * sizeof *flows);
- } else {
- for (i = 0; i < n; i++) {
- flows[i].actions = NULL;
- flows[i].n_actions = 0;
- }
- }
- retval = dpif->dpif_class->flow_list(dpif, flows, n);
- if (retval < 0) {
- *n_out = 0;
- VLOG_WARN_RL(&error_rl, "%s: flow list failed (%s)",
- dpif_name(dpif), strerror(-retval));
- return -retval;
- } else {
- COVERAGE_ADD(dpif_flow_query_list_n, retval);
- *n_out = MIN(n, retval);
- VLOG_DBG_RL(&dpmsg_rl, "%s: listed %zu flows (of %d)",
- dpif_name(dpif), *n_out, retval);
- return 0;
- }
+ dump->dpif = dpif;
+ dump->error = dpif->dpif_class->flow_dump_start(dpif, &dump->state);
+ log_operation(dpif, "flow_dump_start", dump->error);
}
-/* Retrieves all of the flows in 'dpif'.
- *
- * If successful, returns 0 and stores in '*flowsp' a pointer to a newly
- * allocated array of flows, including their statistics but not including any
- * information about their actions, and sets '*np' to the number of flows in
- * '*flowsp'. The caller is responsible for freeing '*flowsp' by calling
- * free().
+/* Attempts to retrieve another flow from 'dump', which must have been
+ * initialized with dpif_flow_dump_start(). On success, stores a new odp_flow
+ * into 'flow' and returns true. Failure might indicate an actual error or
+ * merely the end of the flow table. An error status for the entire dump
+ * operation is provided when it is completed by calling dpif_flow_dump_done().
*
- * On failure, returns a positive errno value and sets '*flowsp' to NULL and
- * '*np' to 0. */
-int
-dpif_flow_list_all(const struct dpif *dpif,
- struct odp_flow **flowsp, size_t *np)
+ * Dumping flow actions is optional. To avoid dumping actions initialize
+ * 'flow->actions' to NULL and 'flow->actions_len' to 0. Otherwise, point
+ * 'flow->actions' to an array of struct nlattr and initialize
+ * 'flow->actions_len' with the number of bytes of Netlink attributes.
+ * dpif_flow_dump_next() will fill in as many actions as will fit into the
+ * provided array and update 'flow->actions_len' with the number of bytes
+ * required (regardless of whether they fit in the provided space). */
+bool
+dpif_flow_dump_next(struct dpif_flow_dump *dump, struct odp_flow *flow)
{
- struct odp_stats stats;
- struct odp_flow *flows;
- size_t n_flows;
- int error;
+ const struct dpif *dpif = dump->dpif;
- *flowsp = NULL;
- *np = 0;
+ check_rw_odp_flow(flow);
- error = dpif_get_dp_stats(dpif, &stats);
- if (error) {
- return error;
+ if (dump->error) {
+ return false;
}
- flows = xmalloc(sizeof *flows * stats.n_flows);
- error = dpif_flow_list(dpif, flows, stats.n_flows, &n_flows);
- if (error) {
- free(flows);
- return error;
+ dump->error = dpif->dpif_class->flow_dump_next(dpif, dump->state, flow);
+ if (dump->error == EOF) {
+ VLOG_DBG_RL(&dpmsg_rl, "%s: dumped all flows", dpif_name(dpif));
+ } else {
+ if (should_log_flow_message(dump->error)) {
+ log_flow_operation(dpif, "flow_dump_next", dump->error, flow);
+ }
}
- if (stats.n_flows != n_flows) {
- VLOG_WARN_RL(&error_rl, "%s: datapath stats reported %"PRIu32" "
- "flows but flow listing reported %zu",
- dpif_name(dpif), stats.n_flows, n_flows);
+ if (dump->error) {
+ dpif->dpif_class->flow_dump_done(dpif, dump->state);
+ return false;
}
- *flowsp = flows;
- *np = n_flows;
- return 0;
+ return true;
+}
+
+/* Completes flow table dump operation 'dump', which must have been initialized
+ * with dpif_flow_dump_start(). Returns 0 if the dump operation was
+ * error-free, otherwise a positive errno value describing the problem. */
+int
+dpif_flow_dump_done(struct dpif_flow_dump *dump)
+{
+ const struct dpif *dpif = dump->dpif;
+ if (!dump->error) {
+ dump->error = dpif->dpif_class->flow_dump_done(dpif, dump->state);
+ log_operation(dpif, "flow_dump_done", dump->error);
+ }
+ return dump->error == EOF ? 0 : dump->error;
}
-/* Causes 'dpif' to perform the 'n_actions' actions in 'actions' on the
- * Ethernet frame specified in 'packet'.
+/* Causes 'dpif' to perform the 'actions_len' bytes of actions in 'actions' on
+ * the Ethernet frame specified in 'packet'.
*
* Returns 0 if successful, otherwise a positive errno value. */
int
dpif_execute(struct dpif *dpif,
- const union odp_action actions[], size_t n_actions,
+ const struct nlattr *actions, size_t actions_len,
const struct ofpbuf *buf)
{
int error;
COVERAGE_INC(dpif_execute);
- if (n_actions > 0) {
- error = dpif->dpif_class->execute(dpif, actions, n_actions, buf);
+ if (actions_len > 0) {
+ error = dpif->dpif_class->execute(dpif, actions, actions_len, buf);
} else {
error = 0;
}
struct ds ds = DS_EMPTY_INITIALIZER;
char *packet = ofp_packet_to_string(buf->data, buf->size, buf->size);
ds_put_format(&ds, "%s: execute ", dpif_name(dpif));
- format_odp_actions(&ds, actions, n_actions);
+ format_odp_actions(&ds, actions, actions_len);
if (error) {
ds_put_format(&ds, " failed (%s)", strerror(error));
}
log_flow_message(const struct dpif *dpif, int error, const char *operation,
const struct odp_flow_key *flow,
const struct odp_flow_stats *stats,
- const union odp_action *actions, size_t n_actions)
+ const struct nlattr *actions, size_t actions_len)
{
struct ds ds = DS_EMPTY_INITIALIZER;
ds_put_format(&ds, "%s: ", dpif_name(dpif));
ds_put_cstr(&ds, ", ");
format_odp_flow_stats(&ds, stats);
}
- if (actions || n_actions) {
+ if (actions || actions_len) {
ds_put_cstr(&ds, ", actions:");
- format_odp_actions(&ds, actions, n_actions);
+ format_odp_actions(&ds, actions, actions_len);
}
vlog(THIS_MODULE, flow_message_log_level(error), "%s", ds_cstr(&ds));
ds_destroy(&ds);
struct odp_flow *flow)
{
if (error) {
- flow->n_actions = 0;
+ flow->actions_len = 0;
}
log_flow_message(dpif, error, operation, &flow->key,
!error ? &flow->stats : NULL,
- flow->actions, flow->n_actions);
+ flow->actions, flow->actions_len);
}
static void
}
log_flow_message(dpif, error, ds_cstr(&s), &put->flow.key,
!error ? &put->flow.stats : NULL,
- put->flow.actions, put->flow.n_actions);
+ put->flow.actions, put->flow.actions_len);
ds_destroy(&s);
}
/* There is a tendency to construct odp_flow objects on the stack and to
- * forget to properly initialize their "actions" and "n_actions" members.
+ * forget to properly initialize their "actions" and "actions_len" members.
* When this happens, we get memory corruption because the kernel
* writes through the random pointer that is in the "actions" member.
*
* easy-to-identify error later if it is dereferenced, etc.
*
* - Triggering a warning on uninitialized memory from Valgrind if
- * "actions" or "n_actions" was not initialized.
+ * "actions" or "actions_len" was not initialized.
*/
static void
check_rw_odp_flow(struct odp_flow *flow)
{
- if (flow->n_actions) {
+ if (flow->actions_len) {
memset(&flow->actions[0], 0xcc, sizeof flow->actions[0]);
}
}