#include "sflow_api.h"
#include "socket-util.h"
#include "timeval.h"
-
-#define THIS_MODULE VLM_sflow
#include "vlog.h"
+VLOG_DEFINE_THIS_MODULE(sflow)
+
struct ofproto_sflow_port {
struct netdev *netdev; /* Underlying network device, for stats. */
SFLDataSource_instance dsi; /* sFlow library's notion of port number. */
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
+static bool
+nullable_string_is_equal(const char *a, const char *b)
+{
+ return a ? b && !strcmp(a, b) : !b;
+}
+
static bool
ofproto_sflow_options_equal(const struct ofproto_sflow_options *a,
const struct ofproto_sflow_options *b)
&& a->polling_interval == b->polling_interval
&& a->header_len == b->header_len
&& a->sub_id == b->sub_id
- && !strcmp(a->agent_device, b->agent_device)
- && !strcmp(a->control_ip, b->control_ip));
+ && nullable_string_is_equal(a->agent_device, b->agent_device)
+ && nullable_string_is_equal(a->control_ip, b->control_ip));
}
static struct ofproto_sflow_options *
ofproto_sflow_options_clone(const struct ofproto_sflow_options *old)
{
struct ofproto_sflow_options *new = xmemdup(old, sizeof *old);
+ svec_clone(&new->targets, &old->targets);
new->agent_device = old->agent_device ? xstrdup(old->agent_device) : NULL;
new->control_ip = old->control_ip ? xstrdup(old->control_ip) : NULL;
return new;
ofproto_sflow_options_destroy(struct ofproto_sflow_options *options)
{
if (options) {
+ svec_destroy(&options->targets);
free(options->agent_device);
free(options->control_ip);
free(options);
/* sFlow library callback to allocate memory. */
static void *
-sflow_agent_alloc_cb(void *magic UNUSED, SFLAgent *agent UNUSED, size_t bytes)
+sflow_agent_alloc_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED,
+ size_t bytes)
{
return calloc(1, bytes);
}
/* sFlow library callback to free memory. */
static int
-sflow_agent_free_cb(void *magic UNUSED, SFLAgent *agent UNUSED, void *obj)
+sflow_agent_free_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED,
+ void *obj)
{
free(obj);
return 0;
/* sFlow library callback to report error. */
static void
-sflow_agent_error_cb(void *magic UNUSED, SFLAgent *agent UNUSED, char *msg)
+sflow_agent_error_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED,
+ char *msg)
{
VLOG_WARN("sFlow agent error: %s", msg);
}
/* sFlow library callback to send datagram. */
static void
-sflow_agent_send_packet_cb(void *os_, SFLAgent *agent UNUSED,
- SFLReceiver *receiver UNUSED, u_char *pkt,
+sflow_agent_send_packet_cb(void *os_, SFLAgent *agent OVS_UNUSED,
+ SFLReceiver *receiver OVS_UNUSED, u_char *pkt,
uint32_t pktLen)
{
struct ofproto_sflow *os = os_;
counters->ifIndex = SFL_DS_INDEX(poller->dsi);
counters->ifType = 6;
if (!netdev_get_features(osp->netdev, ¤t, NULL, NULL, NULL)) {
+ /* The values of ifDirection come from MAU MIB (RFC 2668): 0 = unknown,
+ 1 = full-duplex, 2 = half-duplex, 3 = in, 4=out */
counters->ifSpeed = netdev_features_to_bps(current);
counters->ifDirection = (netdev_features_is_full_duplex(current)
? 1 : 2);
} else {
counters->ifSpeed = 100000000;
- counters->ifDirection = 1;
+ counters->ifDirection = 0;
}
if (!netdev_get_flags(osp->netdev, &flags) && flags & NETDEV_UP) {
- bool carrier;
-
counters->ifStatus = 1; /* ifAdminStatus up. */
- if (!netdev_get_carrier(osp->netdev, &carrier) && carrier) {
+ if (netdev_get_carrier(osp->netdev)) {
counters->ifStatus |= 2; /* ifOperStatus us. */
}
} else {
if (agent_device) {
struct netdev *netdev;
- if (!netdev_open(agent_device, NETDEV_ETH_TYPE_NONE, &netdev)) {
+ if (!netdev_open_default(agent_device, &netdev)) {
int error = netdev_get_in4(netdev, &in4, NULL);
netdev_close(netdev);
if (!error) {
void
ofproto_sflow_clear(struct ofproto_sflow *os)
{
- struct ofproto_sflow_port *osp;
- unsigned int odp_port;
-
if (os->sflow_agent) {
sfl_agent_release(os->sflow_agent);
os->sflow_agent = NULL;
ofproto_sflow_options_destroy(os->options);
os->options = NULL;
- PORT_ARRAY_FOR_EACH (osp, &os->ports, odp_port) {
- ofproto_sflow_del_port(os, odp_port);
- }
- port_array_clear(&os->ports);
-
/* Turn off sampling to save CPU cycles. */
dpif_set_sflow_probability(os->dpif, 0);
}
ofproto_sflow_destroy(struct ofproto_sflow *os)
{
if (os) {
+ struct ofproto_sflow_port *osp;
+ unsigned int odp_port;
+
ofproto_sflow_clear(os);
+ PORT_ARRAY_FOR_EACH (osp, &os->ports, odp_port) {
+ ofproto_sflow_del_port(os, odp_port);
+ }
port_array_destroy(&os->ports);
free(os);
}
sfl_poller_set_bridgePort(poller, odp_port);
}
+static void
+ofproto_sflow_add_sampler(struct ofproto_sflow *os,
+ struct ofproto_sflow_port *osp)
+{
+ SFLSampler *sampler = sfl_agent_addSampler(os->sflow_agent, &osp->dsi);
+ sfl_sampler_set_sFlowFsPacketSamplingRate(sampler, os->options->sampling_rate);
+ sfl_sampler_set_sFlowFsMaximumHeaderSize(sampler, os->options->header_len);
+ sfl_sampler_set_sFlowFsReceiver(sampler, RECEIVER_INDEX);
+}
+
void
ofproto_sflow_add_port(struct ofproto_sflow *os, uint16_t odp_port,
const char *netdev_name)
ofproto_sflow_del_port(os, odp_port);
/* Open network device. */
- error = netdev_open(netdev_name, NETDEV_ETH_TYPE_NONE, &netdev);
+ error = netdev_open_default(netdev_name, &netdev);
if (error) {
VLOG_WARN_RL(&rl, "failed to open network device \"%s\": %s",
netdev_name, strerror(error));
SFL_DS_SET(osp->dsi, 0, ifindex, 0);
port_array_set(&os->ports, odp_port, osp);
- /* Add poller. */
+ /* Add poller and sampler. */
if (os->sflow_agent) {
ofproto_sflow_add_poller(os, osp, odp_port);
+ ofproto_sflow_add_sampler(os, osp);
}
}
if (osp) {
if (os->sflow_agent) {
sfl_agent_removePoller(os->sflow_agent, &osp->dsi);
+ sfl_agent_removeSampler(os->sflow_agent, &osp->dsi);
}
netdev_close(osp->netdev);
free(osp);
- port_array_set(&os->ports, odp_port, NULL);
+ port_array_delete(&os->ports, odp_port);
}
}
const struct ofproto_sflow_options *options)
{
struct ofproto_sflow_port *osp;
- SFLDataSource_instance dsi;
bool options_changed;
- SFLSampler *sampler;
SFLReceiver *receiver;
unsigned int odp_port;
SFLAddress agentIP;
time_t now;
- int error;
+
+ if (!options->targets.n || !options->sampling_rate) {
+ /* No point in doing any work if there are no targets or nothing to
+ * sample. */
+ ofproto_sflow_clear(os);
+ return;
+ }
options_changed = (!os->options
|| !ofproto_sflow_options_equal(options, os->options));
if (options_changed
|| collectors_count(os->collectors) < options->targets.n) {
collectors_destroy(os->collectors);
- error = collectors_create(&options->targets,
- SFL_DEFAULT_COLLECTOR_PORT, &os->collectors);
+ collectors_create(&options->targets, SFL_DEFAULT_COLLECTOR_PORT,
+ &os->collectors);
if (os->collectors == NULL) {
- VLOG_WARN_RL(&rl, "no configured collectors, sFlow disabled");
+ VLOG_WARN_RL(&rl, "no collectors could be initialized, "
+ "sFlow disabled");
ofproto_sflow_clear(os);
return;
}
sfl_agent_release(os->sflow_agent);
}
os->sflow_agent = xcalloc(1, sizeof *os->sflow_agent);
- now = time_now();
+ now = time_wall();
sfl_agent_init(os->sflow_agent,
&agentIP,
options->sub_id,
sflow_agent_send_packet_cb);
receiver = sfl_agent_addReceiver(os->sflow_agent);
- sfl_receiver_set_sFlowRcvrOwner(receiver, "OpenVSwitch sFlow");
+ sfl_receiver_set_sFlowRcvrOwner(receiver, "Open vSwitch sFlow");
sfl_receiver_set_sFlowRcvrTimeout(receiver, 0xffffffff);
- /* Add a single sampler to represent the whole switch (special <ifIndex>:0
- * datasource). The alternative is to model a physical switch more closely
- * and instantiate a separate sampler object for each interface, but then
- * unicasts would have to be offered to two samplers, and
- * broadcasts/multicasts would have to be offered to all of them. Doing it
- * this way with a single <ifindex>:0 sampler is much more efficient for a
- * virtual switch, and is allowed by the sFlow standard.
- */
- SFL_DS_SET(dsi, 0, 0, 0);
- sampler = sfl_agent_addSampler(os->sflow_agent, &dsi);
- sfl_sampler_set_sFlowFsReceiver(sampler, RECEIVER_INDEX);
- sfl_sampler_set_sFlowFsPacketSamplingRate(sampler, options->sampling_rate);
- sfl_sampler_set_sFlowFsMaximumHeaderSize(sampler, options->header_len);
-
/* Set the sampling_rate down in the datapath. */
dpif_set_sflow_probability(os->dpif,
MAX(1, UINT32_MAX / options->sampling_rate));
- /* Add the currently known ports. */
+ /* Add samplers and pollers for the currently known ports. */
PORT_ARRAY_FOR_EACH (osp, &os->ports, odp_port) {
ofproto_sflow_add_poller(os, osp, odp_port);
+ ofproto_sflow_add_sampler(os, osp);
}
}
SFLFlow_sample_element hdrElem;
SFLSampled_header *header;
SFLFlow_sample_element switchElem;
- SFLSampler *sampler = os->sflow_agent->samplers;
+ SFLSampler *sampler;
const struct odp_sflow_sample_header *hdr;
const union odp_action *actions;
struct ofpbuf payload;
/* Get actions. */
n_actions = hdr->n_actions;
if (n_actions > 65536 / sizeof *actions) {
- VLOG_WARN_RL(&rl, "too many actions in sFlow packet (%"PRIu32" > %zu)",
+ VLOG_WARN_RL(&rl, "too many actions in sFlow packet (%zu > %zu)",
65536 / sizeof *actions, n_actions);
return;
}
/* Get packet payload and extract flow. */
payload.data = (union odp_action *) (actions + n_actions);
payload.size = msg->length - min_size;
- flow_extract(&payload, msg->port, &flow);
+ flow_extract(&payload, 0, msg->port, &flow);
/* Build a flow sample */
memset(&fs, 0, sizeof fs);
fs.output = 0; /* Filled in correctly below. */
fs.sample_pool = hdr->sample_pool;
+ /* We are going to give it to the sampler that represents this input port.
+ * By implementing "ingress-only" sampling like this we ensure that we
+ * never have to offer the same sample to more than one sampler. */
+ sampler = sfl_agent_getSamplerByIfIndex(os->sflow_agent, fs.input);
+ if (!sampler) {
+ VLOG_WARN_RL(&rl, "no sampler for input ifIndex (%"PRIu32")",
+ fs.input);
+ return;
+ }
+
/* Sampled header. */
memset(&hdrElem, 0, sizeof hdrElem);
hdrElem.tag = SFLFLOW_HEADER;
header = &hdrElem.flowType.header;
header->header_protocol = SFLHEADER_ETHERNET_ISO8023;
- header->frame_length = payload.size;
- header->stripped = 4; /* Ethernet FCS stripped off. */
+ /* The frame_length should include the Ethernet FCS (4 bytes),
+ but it has already been stripped, so we need to add 4 here. */
+ header->frame_length = payload.size + 4;
+ /* Ethernet FCS stripped off. */
+ header->stripped = 4;
header->header_length = MIN(payload.size,
sampler->sFlowFsMaximumHeaderSize);
header->header_bytes = payload.data;
/* Add extended switch element. */
memset(&switchElem, 0, sizeof(switchElem));
switchElem.tag = SFLFLOW_EX_SWITCH;
- switchElem.flowType.sw.src_vlan = flow.dl_vlan;
+ switchElem.flowType.sw.src_vlan = ntohs(flow.dl_vlan);
switchElem.flowType.sw.src_priority = -1; /* XXX */
- switchElem.flowType.sw.dst_vlan = -1; /* Filled in correctly below. */
+ /* Initialize the output VLAN and priority to be the same as the input,
+ but these fields can be overriden below if affected by an action. */
+ switchElem.flowType.sw.dst_vlan = switchElem.flowType.sw.src_vlan;
switchElem.flowType.sw.dst_priority = switchElem.flowType.sw.src_priority;
/* Figure out the output ports. */
break;
case ODPAT_SET_VLAN_VID:
- switchElem.flowType.sw.dst_vlan = a->vlan_vid.vlan_vid;
+ switchElem.flowType.sw.dst_vlan = ntohs(a->vlan_vid.vlan_vid);
break;
case ODPAT_SET_VLAN_PCP:
break;
}
}
+
+ /* Set output port, as defined by http://www.sflow.org/sflow_version_5.txt
+ (search for "Input/output port information"). */
if (!n_outputs) {
/* This value indicates that the packet was dropped for an unknown
* reason. */
if (ofproto_sflow_is_enabled(os)) {
time_t now = time_now();
if (now >= os->next_tick) {
- sfl_agent_tick(os->sflow_agent, now);
+ sfl_agent_tick(os->sflow_agent, time_wall());
os->next_tick = now + 1;
}
}
ofproto_sflow_wait(struct ofproto_sflow *os)
{
if (ofproto_sflow_is_enabled(os)) {
- poll_timer_wait(os->next_tick * 1000 - time_msec());
+ poll_timer_wait_until(os->next_tick * 1000LL);
}
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff