#include <sys/stat.h>
#include <unistd.h>
-#include "classifier.h"
#include "cmap.h"
#include "csum.h"
+#include "dp-packet.h"
#include "dpif.h"
#include "dpif-provider.h"
#include "dummy.h"
#include "cmap.h"
#include "latch.h"
#include "list.h"
+#include "match.h"
#include "meta-flow.h"
#include "netdev.h"
#include "netdev-dpdk.h"
#include "odp-util.h"
#include "ofp-print.h"
#include "ofpbuf.h"
+#include "ovs-numa.h"
#include "ovs-rcu.h"
-#include "packet-dpif.h"
#include "packets.h"
#include "poll-loop.h"
+#include "pvector.h"
#include "random.h"
#include "seq.h"
#include "shash.h"
#include "sset.h"
#include "timeval.h"
+#include "tnl-arp-cache.h"
#include "unixctl.h"
#include "util.h"
-#include "vlog.h"
+#include "openvswitch/vlog.h"
VLOG_DEFINE_THIS_MODULE(dpif_netdev);
-/* By default, choose a priority in the middle. */
-#define NETDEV_RULE_PRIORITY 0x8000
-
#define FLOW_DUMP_MAX_BATCH 50
/* Use per thread recirc_depth to prevent recirculation loop. */
#define MAX_RECIRC_DEPTH 5
static struct shash dp_netdevs OVS_GUARDED_BY(dp_netdev_mutex)
= SHASH_INITIALIZER(&dp_netdevs);
-struct dp_netdev_queue {
- unsigned int packet_count;
+static struct vlog_rate_limit upcall_rl = VLOG_RATE_LIMIT_INIT(600, 600);
+
+/* Stores a miniflow with inline values */
+
+struct netdev_flow_key {
+ uint32_t hash; /* Hash function differs for different users. */
+ uint32_t len; /* Length of the following miniflow (incl. map). */
+ struct miniflow mf;
+ uint64_t buf[FLOW_MAX_PACKET_U64S - MINI_N_INLINE];
+};
+
+/* Exact match cache for frequently used flows
+ *
+ * The cache uses a 32-bit hash of the packet (which can be the RSS hash) to
+ * search its entries for a miniflow that matches exactly the miniflow of the
+ * packet. It stores the 'dpcls_rule' (rule) that matches the miniflow.
+ *
+ * A cache entry holds a reference to its 'dp_netdev_flow'.
+ *
+ * A miniflow with a given hash can be in one of EM_FLOW_HASH_SEGS different
+ * entries. The 32-bit hash is split into EM_FLOW_HASH_SEGS values (each of
+ * them is EM_FLOW_HASH_SHIFT bits wide and the remainder is thrown away). Each
+ * value is the index of a cache entry where the miniflow could be.
+ *
+ *
+ * Thread-safety
+ * =============
+ *
+ * Each pmd_thread has its own private exact match cache.
+ * If dp_netdev_input is not called from a pmd thread, a mutex is used.
+ */
- struct dpif_upcall upcalls[NETDEV_MAX_RX_BATCH];
- struct ofpbuf bufs[NETDEV_MAX_RX_BATCH];
+#define EM_FLOW_HASH_SHIFT 13
+#define EM_FLOW_HASH_ENTRIES (1u << EM_FLOW_HASH_SHIFT)
+#define EM_FLOW_HASH_MASK (EM_FLOW_HASH_ENTRIES - 1)
+#define EM_FLOW_HASH_SEGS 2
+
+struct emc_entry {
+ struct dp_netdev_flow *flow;
+ struct netdev_flow_key key; /* key.hash used for emc hash value. */
+};
+
+struct emc_cache {
+ struct emc_entry entries[EM_FLOW_HASH_ENTRIES];
+ int sweep_idx; /* For emc_cache_slow_sweep(). */
+};
+
+/* Iterate in the exact match cache through every entry that might contain a
+ * miniflow with hash 'HASH'. */
+#define EMC_FOR_EACH_POS_WITH_HASH(EMC, CURRENT_ENTRY, HASH) \
+ for (uint32_t i__ = 0, srch_hash__ = (HASH); \
+ (CURRENT_ENTRY) = &(EMC)->entries[srch_hash__ & EM_FLOW_HASH_MASK], \
+ i__ < EM_FLOW_HASH_SEGS; \
+ i__++, srch_hash__ >>= EM_FLOW_HASH_SHIFT)
+\f
+/* Simple non-wildcarding single-priority classifier. */
+
+struct dpcls {
+ struct cmap subtables_map;
+ struct pvector subtables;
};
-#define DP_NETDEV_QUEUE_INITIALIZER { .packet_count = 0 }
+/* A rule to be inserted to the classifier. */
+struct dpcls_rule {
+ struct cmap_node cmap_node; /* Within struct dpcls_subtable 'rules'. */
+ struct netdev_flow_key *mask; /* Subtable's mask. */
+ struct netdev_flow_key flow; /* Matching key. */
+ /* 'flow' must be the last field, additional space is allocated here. */
+};
+static void dpcls_init(struct dpcls *);
+static void dpcls_destroy(struct dpcls *);
+static void dpcls_insert(struct dpcls *, struct dpcls_rule *,
+ const struct netdev_flow_key *mask);
+static void dpcls_remove(struct dpcls *, struct dpcls_rule *);
+static bool dpcls_lookup(const struct dpcls *cls,
+ const struct netdev_flow_key keys[],
+ struct dpcls_rule **rules, size_t cnt);
+\f
/* Datapath based on the network device interface from netdev.h.
*
*
*
* dp_netdev_mutex (global)
* port_mutex
- * flow_mutex
*/
struct dp_netdev {
const struct dpif_class *const class;
struct ovs_refcount ref_cnt;
atomic_flag destroyed;
- /* Flows.
- *
- * Writers of 'flow_table' must take the 'flow_mutex'. Corresponding
- * changes to 'cls' must be made while still holding the 'flow_mutex'.
- */
- struct ovs_mutex flow_mutex;
- struct classifier cls;
- struct cmap flow_table OVS_GUARDED; /* Flow table. */
-
- /* Statistics.
- *
- * ovsthread_stats is internally synchronized. */
- struct ovsthread_stats stats; /* Contains 'struct dp_netdev_stats *'. */
-
/* Ports.
*
* Protected by RCU. Take the mutex to add or remove ports. */
/* Protects access to ofproto-dpif-upcall interface during revalidator
* thread synchronization. */
struct fat_rwlock upcall_rwlock;
- exec_upcall_cb *upcall_cb; /* Callback function for executing upcalls. */
+ upcall_callback *upcall_cb; /* Callback function for executing upcalls. */
+ void *upcall_aux;
+
+ /* Stores all 'struct dp_netdev_pmd_thread's. */
+ struct cmap poll_threads;
- /* Forwarding threads. */
- struct latch exit_latch;
- struct pmd_thread *pmd_threads;
- size_t n_pmd_threads;
- int pmd_count;
+ /* Protects the access of the 'struct dp_netdev_pmd_thread'
+ * instance for non-pmd thread. */
+ struct ovs_mutex non_pmd_mutex;
+
+ /* Each pmd thread will store its pointer to
+ * 'struct dp_netdev_pmd_thread' in 'per_pmd_key'. */
+ ovsthread_key_t per_pmd_key;
+
+ /* Number of rx queues for each dpdk interface and the cpu mask
+ * for pin of pmd threads. */
+ size_t n_dpdk_rxqs;
+ char *pmd_cmask;
+ uint64_t last_tnl_conf_seq;
};
static struct dp_netdev_port *dp_netdev_lookup_port(const struct dp_netdev *dp,
odp_port_t);
enum dp_stat_type {
- DP_STAT_HIT, /* Packets that matched in the flow table. */
+ DP_STAT_EXACT_HIT, /* Packets that had an exact match (emc). */
+ DP_STAT_MASKED_HIT, /* Packets that matched in the flow table. */
DP_STAT_MISS, /* Packets that did not match. */
DP_STAT_LOST, /* Packets not passed up to the client. */
DP_N_STATS
};
-/* Contained by struct dp_netdev's 'stats' member. */
-struct dp_netdev_stats {
- struct ovs_mutex mutex; /* Protects 'n'. */
-
- /* Indexed by DP_STAT_*, protected by 'mutex'. */
- unsigned long long int n[DP_N_STATS] OVS_GUARDED;
+enum pmd_cycles_counter_type {
+ PMD_CYCLES_POLLING, /* Cycles spent polling NICs. */
+ PMD_CYCLES_PROCESSING, /* Cycles spent processing packets */
+ PMD_N_CYCLES
};
-
/* A port in a netdev-based datapath. */
struct dp_netdev_port {
- struct cmap_node node; /* Node in dp_netdev's 'ports'. */
odp_port_t port_no;
struct netdev *netdev;
+ struct cmap_node node; /* Node in dp_netdev's 'ports'. */
struct netdev_saved_flags *sf;
struct netdev_rxq **rxq;
struct ovs_refcount ref_cnt;
char *type; /* Port type as requested by user. */
};
-
-/* Stores a miniflow */
-
-/* There are fields in the flow structure that we never use. Therefore we can
- * save a few words of memory */
-#define NETDEV_KEY_BUF_SIZE_U32 (FLOW_U32S - MINI_N_INLINE \
- - FLOW_U32_SIZE(regs) \
- - FLOW_U32_SIZE(metadata) \
- )
-struct netdev_flow_key {
- struct miniflow flow;
- uint32_t buf[NETDEV_KEY_BUF_SIZE_U32];
+/* Contained by struct dp_netdev_flow's 'stats' member. */
+struct dp_netdev_flow_stats {
+ atomic_llong used; /* Last used time, in monotonic msecs. */
+ atomic_ullong packet_count; /* Number of packets matched. */
+ atomic_ullong byte_count; /* Number of bytes matched. */
+ atomic_uint16_t tcp_flags; /* Bitwise-OR of seen tcp_flags values. */
};
-/* A flow in dp_netdev's 'flow_table'.
+/* A flow in 'dp_netdev_pmd_thread's 'flow_table'.
*
*
* Thread-safety
* =============
*
* Except near the beginning or ending of its lifespan, rule 'rule' belongs to
- * its dp_netdev's classifier. The text below calls this classifier 'cls'.
+ * its pmd thread's classifier. The text below calls this classifier 'cls'.
*
* Motivation
* ----------
* Rules
* -----
*
- * A flow 'flow' may be accessed without a risk of being freed by code that
- * holds a read-lock or write-lock on 'cls->rwlock' or that owns a reference to
- * 'flow->ref_cnt' (or both). Code that needs to hold onto a flow for a while
- * should take 'cls->rwlock', find the flow it needs, increment 'flow->ref_cnt'
- * with dpif_netdev_flow_ref(), and drop 'cls->rwlock'.
+ * A flow 'flow' may be accessed without a risk of being freed during an RCU
+ * grace period. Code that needs to hold onto a flow for a while
+ * should try incrementing 'flow->ref_cnt' with dp_netdev_flow_ref().
*
* 'flow->ref_cnt' protects 'flow' from being freed. It doesn't protect the
- * flow from being deleted from 'cls' (that's 'cls->rwlock') and it doesn't
- * protect members of 'flow' from modification.
+ * flow from being deleted from 'cls' and it doesn't protect members of 'flow'
+ * from modification.
*
* Some members, marked 'const', are immutable. Accessing other members
* requires synchronization, as noted in more detail below.
*/
struct dp_netdev_flow {
- /* Packet classification. */
- const struct cls_rule cr; /* In owning dp_netdev's 'cls'. */
-
+ const struct flow flow; /* Unmasked flow that created this entry. */
/* Hash table index by unmasked flow. */
- const struct cmap_node node; /* In owning dp_netdev's 'flow_table'. */
- const struct flow flow; /* The flow that created this entry. */
+ const struct cmap_node node; /* In owning dp_netdev_pmd_thread's */
+ /* 'flow_table'. */
+ const ovs_u128 ufid; /* Unique flow identifier. */
+ const unsigned pmd_id; /* The 'core_id' of pmd thread owning this */
+ /* flow. */
+
+ /* Number of references.
+ * The classifier owns one reference.
+ * Any thread trying to keep a rule from being freed should hold its own
+ * reference. */
+ struct ovs_refcount ref_cnt;
- /* Statistics.
- *
- * Reading or writing these members requires 'mutex'. */
- struct ovsthread_stats stats; /* Contains "struct dp_netdev_flow_stats". */
+ bool dead;
+
+ /* Statistics. */
+ struct dp_netdev_flow_stats stats;
/* Actions. */
OVSRCU_TYPE(struct dp_netdev_actions *) actions;
-};
-
-static void dp_netdev_flow_free(struct dp_netdev_flow *);
-/* Contained by struct dp_netdev_flow's 'stats' member. */
-struct dp_netdev_flow_stats {
- struct ovs_mutex mutex; /* Guards all the other members. */
+ /* While processing a group of input packets, the datapath uses the next
+ * member to store a pointer to the output batch for the flow. It is
+ * reset after the batch has been sent out (See dp_netdev_queue_batches(),
+ * packet_batch_init() and packet_batch_execute()). */
+ struct packet_batch *batch;
- long long int used OVS_GUARDED; /* Last used time, in monotonic msecs. */
- long long int packet_count OVS_GUARDED; /* Number of packets matched. */
- long long int byte_count OVS_GUARDED; /* Number of bytes matched. */
- uint16_t tcp_flags OVS_GUARDED; /* Bitwise-OR of seen tcp_flags values. */
+ /* Packet classification. */
+ struct dpcls_rule cr; /* In owning dp_netdev's 'cls'. */
+ /* 'cr' must be the last member. */
};
+static void dp_netdev_flow_unref(struct dp_netdev_flow *);
+static bool dp_netdev_flow_ref(struct dp_netdev_flow *);
+static int dpif_netdev_flow_from_nlattrs(const struct nlattr *, uint32_t,
+ struct flow *);
+
/* A set of datapath actions within a "struct dp_netdev_flow".
*
*
struct dp_netdev_actions {
/* These members are immutable: they do not change during the struct's
* lifetime. */
- struct nlattr *actions; /* Sequence of OVS_ACTION_ATTR_* attributes. */
unsigned int size; /* Size of 'actions', in bytes. */
+ struct nlattr actions[]; /* Sequence of OVS_ACTION_ATTR_* attributes. */
};
struct dp_netdev_actions *dp_netdev_actions_create(const struct nlattr *,
const struct dp_netdev_flow *);
static void dp_netdev_actions_free(struct dp_netdev_actions *);
+/* Contained by struct dp_netdev_pmd_thread's 'stats' member. */
+struct dp_netdev_pmd_stats {
+ /* Indexed by DP_STAT_*. */
+ atomic_ullong n[DP_N_STATS];
+};
+
+/* Contained by struct dp_netdev_pmd_thread's 'cycle' member. */
+struct dp_netdev_pmd_cycles {
+ /* Indexed by PMD_CYCLES_*. */
+ atomic_ullong n[PMD_N_CYCLES];
+};
+
/* PMD: Poll modes drivers. PMD accesses devices via polling to eliminate
* the performance overhead of interrupt processing. Therefore netdev can
* not implement rx-wait for these devices. dpif-netdev needs to poll
* these device to check for recv buffer. pmd-thread does polling for
- * devices assigned to itself thread.
+ * devices assigned to itself.
*
* DPDK used PMD for accessing NIC.
*
- * A thread that receives packets from PMD ports, looks them up in the flow
- * table, and executes the actions it finds.
- **/
-struct pmd_thread {
+ * Note, instance with cpu core id NON_PMD_CORE_ID will be reserved for
+ * I/O of all non-pmd threads. There will be no actual thread created
+ * for the instance.
+ *
+ * Each struct has its own flow table and classifier. Packets received
+ * from managed ports are looked up in the corresponding pmd thread's
+ * flow table, and are executed with the found actions.
+ * */
+struct dp_netdev_pmd_thread {
struct dp_netdev *dp;
+ struct ovs_refcount ref_cnt; /* Every reference must be refcount'ed. */
+ struct cmap_node node; /* In 'dp->poll_threads'. */
+
+ pthread_cond_t cond; /* For synchronizing pmd thread reload. */
+ struct ovs_mutex cond_mutex; /* Mutex for condition variable. */
+
+ /* Per thread exact-match cache. Note, the instance for cpu core
+ * NON_PMD_CORE_ID can be accessed by multiple threads, and thusly
+ * need to be protected (e.g. by 'dp_netdev_mutex'). All other
+ * instances will only be accessed by its own pmd thread. */
+ struct emc_cache flow_cache;
+
+ /* Classifier and Flow-Table.
+ *
+ * Writers of 'flow_table' must take the 'flow_mutex'. Corresponding
+ * changes to 'cls' must be made while still holding the 'flow_mutex'.
+ */
+ struct ovs_mutex flow_mutex;
+ struct dpcls cls;
+ struct cmap flow_table OVS_GUARDED; /* Flow table. */
+
+ /* Statistics. */
+ struct dp_netdev_pmd_stats stats;
+
+ /* Cycles counters */
+ struct dp_netdev_pmd_cycles cycles;
+
+ /* Used to count cicles. See 'cycles_counter_end()' */
+ unsigned long long last_cycles;
+
+ struct latch exit_latch; /* For terminating the pmd thread. */
+ atomic_uint change_seq; /* For reloading pmd ports. */
pthread_t thread;
- int id;
- atomic_uint change_seq;
+ int index; /* Idx of this pmd thread among pmd*/
+ /* threads on same numa node. */
+ unsigned core_id; /* CPU core id of this pmd thread. */
+ int numa_id; /* numa node id of this pmd thread. */
+ int tx_qid; /* Queue id used by this pmd thread to
+ * send packets on all netdevs */
+
+ /* Only a pmd thread can write on its own 'cycles' and 'stats'.
+ * The main thread keeps 'stats_zero' and 'cycles_zero' as base
+ * values and subtracts them from 'stats' and 'cycles' before
+ * reporting to the user */
+ unsigned long long stats_zero[DP_N_STATS];
+ uint64_t cycles_zero[PMD_N_CYCLES];
};
+#define PMD_INITIAL_SEQ 1
+
/* Interface to netdev-based datapath. */
struct dpif_netdev {
struct dpif dpif;
struct dp_netdev_port **portp);
static void dp_netdev_free(struct dp_netdev *)
OVS_REQUIRES(dp_netdev_mutex);
-static void dp_netdev_flow_flush(struct dp_netdev *);
static int do_add_port(struct dp_netdev *dp, const char *devname,
const char *type, odp_port_t port_no)
OVS_REQUIRES(dp->port_mutex);
OVS_REQUIRES(dp->port_mutex);
static int dpif_netdev_open(const struct dpif_class *, const char *name,
bool create, struct dpif **);
-static int dp_netdev_queue_userspace_packet(struct dp_netdev_queue *,
- struct ofpbuf *, int type,
- const struct miniflow *,
- const struct nlattr *);
-static void dp_netdev_execute_userspace_queue(struct dp_netdev_queue *,
- struct dp_netdev *);
-static void dp_netdev_execute_actions(struct dp_netdev *dp,
- struct dpif_packet **, int c,
- bool may_steal, struct pkt_metadata *,
+static void dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
+ struct dp_packet **, int c,
+ bool may_steal,
const struct nlattr *actions,
size_t actions_len);
-static void dp_netdev_port_input(struct dp_netdev *dp,
- struct dpif_packet **packets, int cnt,
- odp_port_t port_no);
+static void dp_netdev_input(struct dp_netdev_pmd_thread *,
+ struct dp_packet **, int cnt);
-static void dp_netdev_set_pmd_threads(struct dp_netdev *, int n);
static void dp_netdev_disable_upcall(struct dp_netdev *);
+void dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd);
+static void dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd,
+ struct dp_netdev *dp, int index,
+ unsigned core_id, int numa_id);
+static void dp_netdev_destroy_pmd(struct dp_netdev_pmd_thread *pmd);
+static void dp_netdev_set_nonpmd(struct dp_netdev *dp);
+static struct dp_netdev_pmd_thread *dp_netdev_get_pmd(struct dp_netdev *dp,
+ unsigned core_id);
+static struct dp_netdev_pmd_thread *
+dp_netdev_pmd_get_next(struct dp_netdev *dp, struct cmap_position *pos);
+static void dp_netdev_destroy_all_pmds(struct dp_netdev *dp);
+static void dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id);
+static void dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id);
+static void dp_netdev_reset_pmd_threads(struct dp_netdev *dp);
+static bool dp_netdev_pmd_try_ref(struct dp_netdev_pmd_thread *pmd);
+static void dp_netdev_pmd_unref(struct dp_netdev_pmd_thread *pmd);
+static void dp_netdev_pmd_flow_flush(struct dp_netdev_pmd_thread *pmd);
+
+static inline bool emc_entry_alive(struct emc_entry *ce);
+static void emc_clear_entry(struct emc_entry *ce);
+
+static void
+emc_cache_init(struct emc_cache *flow_cache)
+{
+ int i;
+
+ BUILD_ASSERT(offsetof(struct miniflow, inline_values) == sizeof(uint64_t));
+
+ flow_cache->sweep_idx = 0;
+ for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
+ flow_cache->entries[i].flow = NULL;
+ flow_cache->entries[i].key.hash = 0;
+ flow_cache->entries[i].key.len
+ = offsetof(struct miniflow, inline_values);
+ miniflow_initialize(&flow_cache->entries[i].key.mf,
+ flow_cache->entries[i].key.buf);
+ }
+}
+
+static void
+emc_cache_uninit(struct emc_cache *flow_cache)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(flow_cache->entries); i++) {
+ emc_clear_entry(&flow_cache->entries[i]);
+ }
+}
+
+/* Check and clear dead flow references slowly (one entry at each
+ * invocation). */
+static void
+emc_cache_slow_sweep(struct emc_cache *flow_cache)
+{
+ struct emc_entry *entry = &flow_cache->entries[flow_cache->sweep_idx];
+
+ if (!emc_entry_alive(entry)) {
+ emc_clear_entry(entry);
+ }
+ flow_cache->sweep_idx = (flow_cache->sweep_idx + 1) & EM_FLOW_HASH_MASK;
+}
+
+/* Returns true if 'dpif' is a netdev or dummy dpif, false otherwise. */
+bool
+dpif_is_netdev(const struct dpif *dpif)
+{
+ return dpif->dpif_class->open == dpif_netdev_open;
+}
static struct dpif_netdev *
dpif_netdev_cast(const struct dpif *dpif)
{
- ovs_assert(dpif->dpif_class->open == dpif_netdev_open);
+ ovs_assert(dpif_is_netdev(dpif));
return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
}
{
return dpif_netdev_cast(dpif)->dp;
}
+\f
+enum pmd_info_type {
+ PMD_INFO_SHOW_STATS, /* show how cpu cycles are spent */
+ PMD_INFO_CLEAR_STATS /* set the cycles count to 0 */
+};
+
+static void
+pmd_info_show_stats(struct ds *reply,
+ struct dp_netdev_pmd_thread *pmd,
+ unsigned long long stats[DP_N_STATS],
+ uint64_t cycles[PMD_N_CYCLES])
+{
+ unsigned long long total_packets = 0;
+ uint64_t total_cycles = 0;
+ int i;
+
+ /* These loops subtracts reference values ('*_zero') from the counters.
+ * Since loads and stores are relaxed, it might be possible for a '*_zero'
+ * value to be more recent than the current value we're reading from the
+ * counter. This is not a big problem, since these numbers are not
+ * supposed to be too accurate, but we should at least make sure that
+ * the result is not negative. */
+ for (i = 0; i < DP_N_STATS; i++) {
+ if (stats[i] > pmd->stats_zero[i]) {
+ stats[i] -= pmd->stats_zero[i];
+ } else {
+ stats[i] = 0;
+ }
+
+ if (i != DP_STAT_LOST) {
+ /* Lost packets are already included in DP_STAT_MISS */
+ total_packets += stats[i];
+ }
+ }
+
+ for (i = 0; i < PMD_N_CYCLES; i++) {
+ if (cycles[i] > pmd->cycles_zero[i]) {
+ cycles[i] -= pmd->cycles_zero[i];
+ } else {
+ cycles[i] = 0;
+ }
+
+ total_cycles += cycles[i];
+ }
+
+ ds_put_cstr(reply, (pmd->core_id == NON_PMD_CORE_ID)
+ ? "main thread" : "pmd thread");
+
+ if (pmd->numa_id != OVS_NUMA_UNSPEC) {
+ ds_put_format(reply, " numa_id %d", pmd->numa_id);
+ }
+ if (pmd->core_id != OVS_CORE_UNSPEC && pmd->core_id != NON_PMD_CORE_ID) {
+ ds_put_format(reply, " core_id %u", pmd->core_id);
+ }
+ ds_put_cstr(reply, ":\n");
+
+ ds_put_format(reply,
+ "\temc hits:%llu\n\tmegaflow hits:%llu\n"
+ "\tmiss:%llu\n\tlost:%llu\n",
+ stats[DP_STAT_EXACT_HIT], stats[DP_STAT_MASKED_HIT],
+ stats[DP_STAT_MISS], stats[DP_STAT_LOST]);
+
+ if (total_cycles == 0) {
+ return;
+ }
+
+ ds_put_format(reply,
+ "\tpolling cycles:%"PRIu64" (%.02f%%)\n"
+ "\tprocessing cycles:%"PRIu64" (%.02f%%)\n",
+ cycles[PMD_CYCLES_POLLING],
+ cycles[PMD_CYCLES_POLLING] / (double)total_cycles * 100,
+ cycles[PMD_CYCLES_PROCESSING],
+ cycles[PMD_CYCLES_PROCESSING] / (double)total_cycles * 100);
+
+ if (total_packets == 0) {
+ return;
+ }
+
+ ds_put_format(reply,
+ "\tavg cycles per packet: %.02f (%"PRIu64"/%llu)\n",
+ total_cycles / (double)total_packets,
+ total_cycles, total_packets);
+
+ ds_put_format(reply,
+ "\tavg processing cycles per packet: "
+ "%.02f (%"PRIu64"/%llu)\n",
+ cycles[PMD_CYCLES_PROCESSING] / (double)total_packets,
+ cycles[PMD_CYCLES_PROCESSING], total_packets);
+}
+
+static void
+pmd_info_clear_stats(struct ds *reply OVS_UNUSED,
+ struct dp_netdev_pmd_thread *pmd,
+ unsigned long long stats[DP_N_STATS],
+ uint64_t cycles[PMD_N_CYCLES])
+{
+ int i;
+
+ /* We cannot write 'stats' and 'cycles' (because they're written by other
+ * threads) and we shouldn't change 'stats' (because they're used to count
+ * datapath stats, which must not be cleared here). Instead, we save the
+ * current values and subtract them from the values to be displayed in the
+ * future */
+ for (i = 0; i < DP_N_STATS; i++) {
+ pmd->stats_zero[i] = stats[i];
+ }
+ for (i = 0; i < PMD_N_CYCLES; i++) {
+ pmd->cycles_zero[i] = cycles[i];
+ }
+}
+
+static void
+dpif_netdev_pmd_info(struct unixctl_conn *conn, int argc, const char *argv[],
+ void *aux)
+{
+ struct ds reply = DS_EMPTY_INITIALIZER;
+ struct dp_netdev_pmd_thread *pmd;
+ struct dp_netdev *dp = NULL;
+ enum pmd_info_type type = *(enum pmd_info_type *) aux;
+
+ ovs_mutex_lock(&dp_netdev_mutex);
+
+ if (argc == 2) {
+ dp = shash_find_data(&dp_netdevs, argv[1]);
+ } else if (shash_count(&dp_netdevs) == 1) {
+ /* There's only one datapath */
+ dp = shash_first(&dp_netdevs)->data;
+ }
+
+ if (!dp) {
+ ovs_mutex_unlock(&dp_netdev_mutex);
+ unixctl_command_reply_error(conn,
+ "please specify an existing datapath");
+ return;
+ }
+
+ CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
+ unsigned long long stats[DP_N_STATS];
+ uint64_t cycles[PMD_N_CYCLES];
+ int i;
+
+ /* Read current stats and cycle counters */
+ for (i = 0; i < ARRAY_SIZE(stats); i++) {
+ atomic_read_relaxed(&pmd->stats.n[i], &stats[i]);
+ }
+ for (i = 0; i < ARRAY_SIZE(cycles); i++) {
+ atomic_read_relaxed(&pmd->cycles.n[i], &cycles[i]);
+ }
+
+ if (type == PMD_INFO_CLEAR_STATS) {
+ pmd_info_clear_stats(&reply, pmd, stats, cycles);
+ } else if (type == PMD_INFO_SHOW_STATS) {
+ pmd_info_show_stats(&reply, pmd, stats, cycles);
+ }
+ }
+
+ ovs_mutex_unlock(&dp_netdev_mutex);
+
+ unixctl_command_reply(conn, ds_cstr(&reply));
+ ds_destroy(&reply);
+}
+\f
+static int
+dpif_netdev_init(void)
+{
+ static enum pmd_info_type show_aux = PMD_INFO_SHOW_STATS,
+ clear_aux = PMD_INFO_CLEAR_STATS;
+
+ unixctl_command_register("dpif-netdev/pmd-stats-show", "[dp]",
+ 0, 1, dpif_netdev_pmd_info,
+ (void *)&show_aux);
+ unixctl_command_register("dpif-netdev/pmd-stats-clear", "[dp]",
+ 0, 1, dpif_netdev_pmd_info,
+ (void *)&clear_aux);
+ return 0;
+}
static int
dpif_netdev_enumerate(struct sset *all_dps,
ovs_refcount_init(&dp->ref_cnt);
atomic_flag_clear(&dp->destroyed);
- ovs_mutex_init(&dp->flow_mutex);
- classifier_init(&dp->cls, NULL);
- cmap_init(&dp->flow_table);
-
- ovsthread_stats_init(&dp->stats);
-
ovs_mutex_init(&dp->port_mutex);
cmap_init(&dp->ports);
dp->port_seq = seq_create();
- latch_init(&dp->exit_latch);
fat_rwlock_init(&dp->upcall_rwlock);
/* Disable upcalls by default. */
dp_netdev_disable_upcall(dp);
+ dp->upcall_aux = NULL;
dp->upcall_cb = NULL;
+ cmap_init(&dp->poll_threads);
+ ovs_mutex_init_recursive(&dp->non_pmd_mutex);
+ ovsthread_key_create(&dp->per_pmd_key, NULL);
+
+ dp_netdev_set_nonpmd(dp);
+ dp->n_dpdk_rxqs = NR_QUEUE;
+
ovs_mutex_lock(&dp->port_mutex);
error = do_add_port(dp, name, "internal", ODPP_LOCAL);
ovs_mutex_unlock(&dp->port_mutex);
return error;
}
+ dp->last_tnl_conf_seq = seq_read(tnl_conf_seq);
*dpp = dp;
return 0;
}
return error;
}
+static void
+dp_netdev_destroy_upcall_lock(struct dp_netdev *dp)
+ OVS_NO_THREAD_SAFETY_ANALYSIS
+{
+ /* Check that upcalls are disabled, i.e. that the rwlock is taken */
+ ovs_assert(fat_rwlock_tryrdlock(&dp->upcall_rwlock));
+
+ /* Before freeing a lock we should release it */
+ fat_rwlock_unlock(&dp->upcall_rwlock);
+ fat_rwlock_destroy(&dp->upcall_rwlock);
+}
+
/* Requires dp_netdev_mutex so that we can't get a new reference to 'dp'
* through the 'dp_netdevs' shash while freeing 'dp'. */
static void
OVS_REQUIRES(dp_netdev_mutex)
{
struct dp_netdev_port *port;
- struct dp_netdev_stats *bucket;
- int i;
shash_find_and_delete(&dp_netdevs, dp->name);
- dp_netdev_set_pmd_threads(dp, 0);
- free(dp->pmd_threads);
+ dp_netdev_destroy_all_pmds(dp);
+ cmap_destroy(&dp->poll_threads);
+ ovs_mutex_destroy(&dp->non_pmd_mutex);
+ ovsthread_key_delete(dp->per_pmd_key);
- dp_netdev_flow_flush(dp);
ovs_mutex_lock(&dp->port_mutex);
CMAP_FOR_EACH (port, node, &dp->ports) {
do_del_port(dp, port);
}
ovs_mutex_unlock(&dp->port_mutex);
- OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
- ovs_mutex_destroy(&bucket->mutex);
- free_cacheline(bucket);
- }
- ovsthread_stats_destroy(&dp->stats);
-
- classifier_destroy(&dp->cls);
- cmap_destroy(&dp->flow_table);
- ovs_mutex_destroy(&dp->flow_mutex);
seq_destroy(dp->port_seq);
cmap_destroy(&dp->ports);
- fat_rwlock_destroy(&dp->upcall_rwlock);
- latch_destroy(&dp->exit_latch);
+
+ /* Upcalls must be disabled at this point */
+ dp_netdev_destroy_upcall_lock(dp);
+
+ free(dp->pmd_cmask);
free(CONST_CAST(char *, dp->name));
free(dp);
}
return 0;
}
+/* Add 'n' to the atomic variable 'var' non-atomically and using relaxed
+ * load/store semantics. While the increment is not atomic, the load and
+ * store operations are, making it impossible to read inconsistent values.
+ *
+ * This is used to update thread local stats counters. */
+static void
+non_atomic_ullong_add(atomic_ullong *var, unsigned long long n)
+{
+ unsigned long long tmp;
+
+ atomic_read_relaxed(var, &tmp);
+ tmp += n;
+ atomic_store_relaxed(var, tmp);
+}
+
static int
dpif_netdev_get_stats(const struct dpif *dpif, struct dpif_dp_stats *stats)
{
struct dp_netdev *dp = get_dp_netdev(dpif);
- struct dp_netdev_stats *bucket;
- size_t i;
-
- stats->n_flows = cmap_count(&dp->flow_table);
-
- stats->n_hit = stats->n_missed = stats->n_lost = 0;
- OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &dp->stats) {
- ovs_mutex_lock(&bucket->mutex);
- stats->n_hit += bucket->n[DP_STAT_HIT];
- stats->n_missed += bucket->n[DP_STAT_MISS];
- stats->n_lost += bucket->n[DP_STAT_LOST];
- ovs_mutex_unlock(&bucket->mutex);
+ struct dp_netdev_pmd_thread *pmd;
+
+ stats->n_flows = stats->n_hit = stats->n_missed = stats->n_lost = 0;
+ CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
+ unsigned long long n;
+ stats->n_flows += cmap_count(&pmd->flow_table);
+
+ atomic_read_relaxed(&pmd->stats.n[DP_STAT_MASKED_HIT], &n);
+ stats->n_hit += n;
+ atomic_read_relaxed(&pmd->stats.n[DP_STAT_EXACT_HIT], &n);
+ stats->n_hit += n;
+ atomic_read_relaxed(&pmd->stats.n[DP_STAT_MISS], &n);
+ stats->n_missed += n;
+ atomic_read_relaxed(&pmd->stats.n[DP_STAT_LOST], &n);
+ stats->n_lost += n;
}
stats->n_masks = UINT32_MAX;
stats->n_mask_hit = UINT64_MAX;
}
static void
-dp_netdev_reload_pmd_threads(struct dp_netdev *dp)
+dp_netdev_reload_pmd__(struct dp_netdev_pmd_thread *pmd)
{
- int i;
+ int old_seq;
+
+ if (pmd->core_id == NON_PMD_CORE_ID) {
+ return;
+ }
+
+ ovs_mutex_lock(&pmd->cond_mutex);
+ atomic_add_relaxed(&pmd->change_seq, 1, &old_seq);
+ ovs_mutex_cond_wait(&pmd->cond, &pmd->cond_mutex);
+ ovs_mutex_unlock(&pmd->cond_mutex);
+}
- for (i = 0; i < dp->n_pmd_threads; i++) {
- struct pmd_thread *f = &dp->pmd_threads[i];
- int id;
+/* Causes all pmd threads to reload its tx/rx devices.
+ * Must be called after adding/removing ports. */
+static void
+dp_netdev_reload_pmds(struct dp_netdev *dp)
+{
+ struct dp_netdev_pmd_thread *pmd;
- atomic_add(&f->change_seq, 1, &id);
- }
+ CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
+ dp_netdev_reload_pmd__(pmd);
+ }
}
static uint32_t
int error;
int i;
- /* XXX reject devices already in some dp_netdev. */
+ /* Reject devices already in 'dp'. */
+ if (!get_port_by_name(dp, devname, &port)) {
+ return EEXIST;
+ }
/* Open and validate network device. */
open_type = dpif_netdev_port_open_type(dp->class, type);
return EINVAL;
}
+ if (netdev_is_pmd(netdev)) {
+ int n_cores = ovs_numa_get_n_cores();
+
+ if (n_cores == OVS_CORE_UNSPEC) {
+ VLOG_ERR("%s, cannot get cpu core info", devname);
+ return ENOENT;
+ }
+ /* There can only be ovs_numa_get_n_cores() pmd threads,
+ * so creates a txq for each, and one extra for the non
+ * pmd threads. */
+ error = netdev_set_multiq(netdev, n_cores + 1, dp->n_dpdk_rxqs);
+ if (error && (error != EOPNOTSUPP)) {
+ VLOG_ERR("%s, cannot set multiq", devname);
+ return errno;
+ }
+ }
port = xzalloc(sizeof *port);
port->port_no = port_no;
port->netdev = netdev;
VLOG_ERR("%s: cannot receive packets on this network device (%s)",
devname, ovs_strerror(errno));
netdev_close(netdev);
+ free(port->type);
+ free(port->rxq);
+ free(port);
return error;
}
}
netdev_rxq_close(port->rxq[i]);
}
netdev_close(netdev);
+ free(port->type);
free(port->rxq);
free(port);
return error;
}
port->sf = sf;
- if (netdev_is_pmd(netdev)) {
- dp->pmd_count++;
- dp_netdev_set_pmd_threads(dp, NR_PMD_THREADS);
- dp_netdev_reload_pmd_threads(dp);
- }
ovs_refcount_init(&port->ref_cnt);
-
cmap_insert(&dp->ports, &port->node, hash_port_no(port_no));
+
+ if (netdev_is_pmd(netdev)) {
+ dp_netdev_set_pmds_on_numa(dp, netdev_get_numa_id(netdev));
+ dp_netdev_reload_pmds(dp);
+ }
seq_change(dp->port_seq);
return 0;
}
}
-static void
-port_destroy__(struct dp_netdev_port *port)
+static bool
+port_try_ref(struct dp_netdev_port *port)
{
- int n_rxq = netdev_n_rxq(port->netdev);
- int i;
-
- netdev_close(port->netdev);
- netdev_restore_flags(port->sf);
-
- for (i = 0; i < n_rxq; i++) {
- netdev_rxq_close(port->rxq[i]);
+ if (port) {
+ return ovs_refcount_try_ref_rcu(&port->ref_cnt);
}
- free(port->rxq);
- free(port->type);
- free(port);
+
+ return false;
}
static void
port_unref(struct dp_netdev_port *port)
{
if (port && ovs_refcount_unref_relaxed(&port->ref_cnt) == 1) {
- ovsrcu_postpone(port_destroy__, port);
+ int n_rxq = netdev_n_rxq(port->netdev);
+ int i;
+
+ netdev_close(port->netdev);
+ netdev_restore_flags(port->sf);
+
+ for (i = 0; i < n_rxq; i++) {
+ netdev_rxq_close(port->rxq[i]);
+ }
+ free(port->rxq);
+ free(port->type);
+ free(port);
}
}
return ENOENT;
}
+static int
+get_n_pmd_threads_on_numa(struct dp_netdev *dp, int numa_id)
+{
+ struct dp_netdev_pmd_thread *pmd;
+ int n_pmds = 0;
+
+ CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
+ if (pmd->numa_id == numa_id) {
+ n_pmds++;
+ }
+ }
+
+ return n_pmds;
+}
+
+/* Returns 'true' if there is a port with pmd netdev and the netdev
+ * is on numa node 'numa_id'. */
+static bool
+has_pmd_port_for_numa(struct dp_netdev *dp, int numa_id)
+{
+ struct dp_netdev_port *port;
+
+ CMAP_FOR_EACH (port, node, &dp->ports) {
+ if (netdev_is_pmd(port->netdev)
+ && netdev_get_numa_id(port->netdev) == numa_id) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+
static void
do_del_port(struct dp_netdev *dp, struct dp_netdev_port *port)
OVS_REQUIRES(dp->port_mutex)
cmap_remove(&dp->ports, &port->node, hash_odp_port(port->port_no));
seq_change(dp->port_seq);
if (netdev_is_pmd(port->netdev)) {
- dp_netdev_reload_pmd_threads(dp);
+ int numa_id = netdev_get_numa_id(port->netdev);
+
+ /* If there is no netdev on the numa node, deletes the pmd threads
+ * for that numa. Else, just reloads the queues. */
+ if (!has_pmd_port_for_numa(dp, numa_id)) {
+ dp_netdev_del_pmds_on_numa(dp, numa_id);
+ }
+ dp_netdev_reload_pmds(dp);
}
port_unref(port);
static void
dp_netdev_flow_free(struct dp_netdev_flow *flow)
{
- struct dp_netdev_flow_stats *bucket;
- size_t i;
-
- OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &flow->stats) {
- ovs_mutex_destroy(&bucket->mutex);
- free_cacheline(bucket);
- }
- ovsthread_stats_destroy(&flow->stats);
-
- cls_rule_destroy(CONST_CAST(struct cls_rule *, &flow->cr));
dp_netdev_actions_free(dp_netdev_flow_get_actions(flow));
free(flow);
}
+static void dp_netdev_flow_unref(struct dp_netdev_flow *flow)
+{
+ if (ovs_refcount_unref_relaxed(&flow->ref_cnt) == 1) {
+ ovsrcu_postpone(dp_netdev_flow_free, flow);
+ }
+}
+
+static uint32_t
+dp_netdev_flow_hash(const ovs_u128 *ufid)
+{
+ return ufid->u32[0];
+}
+
static void
-dp_netdev_remove_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
- OVS_REQUIRES(dp->flow_mutex)
+dp_netdev_pmd_remove_flow(struct dp_netdev_pmd_thread *pmd,
+ struct dp_netdev_flow *flow)
+ OVS_REQUIRES(pmd->flow_mutex)
{
- struct cls_rule *cr = CONST_CAST(struct cls_rule *, &flow->cr);
struct cmap_node *node = CONST_CAST(struct cmap_node *, &flow->node);
- classifier_remove(&dp->cls, cr);
- cmap_remove(&dp->flow_table, node, flow_hash(&flow->flow, 0));
- ovsrcu_postpone(dp_netdev_flow_free, flow);
+ dpcls_remove(&pmd->cls, &flow->cr);
+ cmap_remove(&pmd->flow_table, node, dp_netdev_flow_hash(&flow->ufid));
+ flow->dead = true;
+
+ dp_netdev_flow_unref(flow);
}
static void
-dp_netdev_flow_flush(struct dp_netdev *dp)
+dp_netdev_pmd_flow_flush(struct dp_netdev_pmd_thread *pmd)
{
struct dp_netdev_flow *netdev_flow;
- ovs_mutex_lock(&dp->flow_mutex);
- CMAP_FOR_EACH (netdev_flow, node, &dp->flow_table) {
- dp_netdev_remove_flow(dp, netdev_flow);
+ ovs_mutex_lock(&pmd->flow_mutex);
+ CMAP_FOR_EACH (netdev_flow, node, &pmd->flow_table) {
+ dp_netdev_pmd_remove_flow(pmd, netdev_flow);
}
- ovs_mutex_unlock(&dp->flow_mutex);
+ ovs_mutex_unlock(&pmd->flow_mutex);
}
static int
dpif_netdev_flow_flush(struct dpif *dpif)
{
struct dp_netdev *dp = get_dp_netdev(dpif);
+ struct dp_netdev_pmd_thread *pmd;
+
+ CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
+ dp_netdev_pmd_flow_flush(pmd);
+ }
- dp_netdev_flow_flush(dp);
return 0;
}
}
static struct dp_netdev_flow *
-dp_netdev_flow_cast(const struct cls_rule *cr)
+dp_netdev_flow_cast(const struct dpcls_rule *cr)
{
return cr ? CONTAINER_OF(cr, struct dp_netdev_flow, cr) : NULL;
}
+static bool dp_netdev_flow_ref(struct dp_netdev_flow *flow)
+{
+ return ovs_refcount_try_ref_rcu(&flow->ref_cnt);
+}
+
+/* netdev_flow_key utilities.
+ *
+ * netdev_flow_key is basically a miniflow. We use these functions
+ * (netdev_flow_key_clone, netdev_flow_key_equal, ...) instead of the miniflow
+ * functions (miniflow_clone_inline, miniflow_equal, ...), because:
+ *
+ * - Since we are dealing exclusively with miniflows created by
+ * miniflow_extract(), if the map is different the miniflow is different.
+ * Therefore we can be faster by comparing the map and the miniflow in a
+ * single memcmp().
+ * _ netdev_flow_key's miniflow has always inline values.
+ * - These functions can be inlined by the compiler.
+ *
+ * The following assertions make sure that what we're doing with miniflow is
+ * safe
+ */
+BUILD_ASSERT_DECL(offsetof(struct miniflow, inline_values)
+ == sizeof(uint64_t));
+
+/* Given the number of bits set in the miniflow map, returns the size of the
+ * 'netdev_flow_key.mf' */
+static inline uint32_t
+netdev_flow_key_size(uint32_t flow_u32s)
+{
+ return offsetof(struct miniflow, inline_values) +
+ MINIFLOW_VALUES_SIZE(flow_u32s);
+}
+
+static inline bool
+netdev_flow_key_equal(const struct netdev_flow_key *a,
+ const struct netdev_flow_key *b)
+{
+ /* 'b->len' may be not set yet. */
+ return a->hash == b->hash && !memcmp(&a->mf, &b->mf, a->len);
+}
+
+/* Used to compare 'netdev_flow_key' in the exact match cache to a miniflow.
+ * The maps are compared bitwise, so both 'key->mf' 'mf' must have been
+ * generated by miniflow_extract. */
+static inline bool
+netdev_flow_key_equal_mf(const struct netdev_flow_key *key,
+ const struct miniflow *mf)
+{
+ return !memcmp(&key->mf, mf, key->len);
+}
+
+static inline void
+netdev_flow_key_clone(struct netdev_flow_key *dst,
+ const struct netdev_flow_key *src)
+{
+ memcpy(dst, src,
+ offsetof(struct netdev_flow_key, mf) + src->len);
+}
+
+/* Slow. */
+static void
+netdev_flow_key_from_flow(struct netdev_flow_key *dst,
+ const struct flow *src)
+{
+ struct dp_packet packet;
+ uint64_t buf_stub[512 / 8];
+
+ miniflow_initialize(&dst->mf, dst->buf);
+
+ dp_packet_use_stub(&packet, buf_stub, sizeof buf_stub);
+ pkt_metadata_from_flow(&packet.md, src);
+ flow_compose(&packet, src);
+ miniflow_extract(&packet, &dst->mf);
+ dp_packet_uninit(&packet);
+
+ dst->len = netdev_flow_key_size(count_1bits(dst->mf.map));
+ dst->hash = 0; /* Not computed yet. */
+}
+
+/* Initialize a netdev_flow_key 'mask' from 'match'. */
+static inline void
+netdev_flow_mask_init(struct netdev_flow_key *mask,
+ const struct match *match)
+{
+ const uint64_t *mask_u64 = (const uint64_t *) &match->wc.masks;
+ uint64_t *dst = mask->mf.inline_values;
+ uint64_t map, mask_map = 0;
+ uint32_t hash = 0;
+ int n;
+
+ /* Only check masks that make sense for the flow. */
+ map = flow_wc_map(&match->flow);
+
+ while (map) {
+ uint64_t rm1bit = rightmost_1bit(map);
+ int i = raw_ctz(map);
+
+ if (mask_u64[i]) {
+ mask_map |= rm1bit;
+ *dst++ = mask_u64[i];
+ hash = hash_add64(hash, mask_u64[i]);
+ }
+ map -= rm1bit;
+ }
+
+ mask->mf.values_inline = true;
+ mask->mf.map = mask_map;
+
+ hash = hash_add64(hash, mask_map);
+
+ n = dst - mask->mf.inline_values;
+
+ mask->hash = hash_finish(hash, n * 8);
+ mask->len = netdev_flow_key_size(n);
+}
+
+/* Initializes 'dst' as a copy of 'src' masked with 'mask'. */
+static inline void
+netdev_flow_key_init_masked(struct netdev_flow_key *dst,
+ const struct flow *flow,
+ const struct netdev_flow_key *mask)
+{
+ uint64_t *dst_u64 = dst->mf.inline_values;
+ const uint64_t *mask_u64 = mask->mf.inline_values;
+ uint32_t hash = 0;
+ uint64_t value;
+
+ dst->len = mask->len;
+ dst->mf.values_inline = true;
+ dst->mf.map = mask->mf.map;
+
+ FLOW_FOR_EACH_IN_MAP(value, flow, mask->mf.map) {
+ *dst_u64 = value & *mask_u64++;
+ hash = hash_add64(hash, *dst_u64++);
+ }
+ dst->hash = hash_finish(hash, (dst_u64 - dst->mf.inline_values) * 8);
+}
+
+/* Iterate through all netdev_flow_key u64 values specified by 'MAP' */
+#define NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(VALUE, KEY, MAP) \
+ for (struct mf_for_each_in_map_aux aux__ \
+ = { (KEY)->mf.inline_values, (KEY)->mf.map, MAP }; \
+ mf_get_next_in_map(&aux__, &(VALUE)); \
+ )
+
+/* Returns a hash value for the bits of 'key' where there are 1-bits in
+ * 'mask'. */
+static inline uint32_t
+netdev_flow_key_hash_in_mask(const struct netdev_flow_key *key,
+ const struct netdev_flow_key *mask)
+{
+ const uint64_t *p = mask->mf.inline_values;
+ uint32_t hash = 0;
+ uint64_t key_u64;
+
+ NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(key_u64, key, mask->mf.map) {
+ hash = hash_add64(hash, key_u64 & *p++);
+ }
+
+ return hash_finish(hash, (p - mask->mf.inline_values) * 8);
+}
+
+static inline bool
+emc_entry_alive(struct emc_entry *ce)
+{
+ return ce->flow && !ce->flow->dead;
+}
+
+static void
+emc_clear_entry(struct emc_entry *ce)
+{
+ if (ce->flow) {
+ dp_netdev_flow_unref(ce->flow);
+ ce->flow = NULL;
+ }
+}
+
+static inline void
+emc_change_entry(struct emc_entry *ce, struct dp_netdev_flow *flow,
+ const struct netdev_flow_key *key)
+{
+ if (ce->flow != flow) {
+ if (ce->flow) {
+ dp_netdev_flow_unref(ce->flow);
+ }
+
+ if (dp_netdev_flow_ref(flow)) {
+ ce->flow = flow;
+ } else {
+ ce->flow = NULL;
+ }
+ }
+ if (key) {
+ netdev_flow_key_clone(&ce->key, key);
+ }
+}
+
+static inline void
+emc_insert(struct emc_cache *cache, const struct netdev_flow_key *key,
+ struct dp_netdev_flow *flow)
+{
+ struct emc_entry *to_be_replaced = NULL;
+ struct emc_entry *current_entry;
+
+ EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
+ if (netdev_flow_key_equal(¤t_entry->key, key)) {
+ /* We found the entry with the 'mf' miniflow */
+ emc_change_entry(current_entry, flow, NULL);
+ return;
+ }
+
+ /* Replacement policy: put the flow in an empty (not alive) entry, or
+ * in the first entry where it can be */
+ if (!to_be_replaced
+ || (emc_entry_alive(to_be_replaced)
+ && !emc_entry_alive(current_entry))
+ || current_entry->key.hash < to_be_replaced->key.hash) {
+ to_be_replaced = current_entry;
+ }
+ }
+ /* We didn't find the miniflow in the cache.
+ * The 'to_be_replaced' entry is where the new flow will be stored */
+
+ emc_change_entry(to_be_replaced, flow, key);
+}
+
+static inline struct dp_netdev_flow *
+emc_lookup(struct emc_cache *cache, const struct netdev_flow_key *key)
+{
+ struct emc_entry *current_entry;
+
+ EMC_FOR_EACH_POS_WITH_HASH(cache, current_entry, key->hash) {
+ if (current_entry->key.hash == key->hash
+ && emc_entry_alive(current_entry)
+ && netdev_flow_key_equal_mf(¤t_entry->key, &key->mf)) {
+
+ /* We found the entry with the 'key->mf' miniflow */
+ return current_entry->flow;
+ }
+ }
+
+ return NULL;
+}
+
static struct dp_netdev_flow *
-dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct miniflow *key)
+dp_netdev_pmd_lookup_flow(const struct dp_netdev_pmd_thread *pmd,
+ const struct netdev_flow_key *key)
{
struct dp_netdev_flow *netdev_flow;
- struct cls_rule *rule;
+ struct dpcls_rule *rule;
- classifier_lookup_miniflow_batch(&dp->cls, &key, &rule, 1);
+ dpcls_lookup(&pmd->cls, key, &rule, 1);
netdev_flow = dp_netdev_flow_cast(rule);
return netdev_flow;
}
static struct dp_netdev_flow *
-dp_netdev_find_flow(const struct dp_netdev *dp, const struct flow *flow)
+dp_netdev_pmd_find_flow(const struct dp_netdev_pmd_thread *pmd,
+ const ovs_u128 *ufidp, const struct nlattr *key,
+ size_t key_len)
{
struct dp_netdev_flow *netdev_flow;
+ struct flow flow;
+ ovs_u128 ufid;
+
+ /* If a UFID is not provided, determine one based on the key. */
+ if (!ufidp && key && key_len
+ && !dpif_netdev_flow_from_nlattrs(key, key_len, &flow)) {
+ dpif_flow_hash(pmd->dp->dpif, &flow, sizeof flow, &ufid);
+ ufidp = &ufid;
+ }
- CMAP_FOR_EACH_WITH_HASH (netdev_flow, node, flow_hash(flow, 0),
- &dp->flow_table) {
- if (flow_equal(&netdev_flow->flow, flow)) {
- return netdev_flow;
+ if (ufidp) {
+ CMAP_FOR_EACH_WITH_HASH (netdev_flow, node, dp_netdev_flow_hash(ufidp),
+ &pmd->flow_table) {
+ if (ovs_u128_equals(&netdev_flow->ufid, ufidp)) {
+ return netdev_flow;
+ }
}
}
}
static void
-get_dpif_flow_stats(struct dp_netdev_flow *netdev_flow,
+get_dpif_flow_stats(const struct dp_netdev_flow *netdev_flow_,
struct dpif_flow_stats *stats)
{
- struct dp_netdev_flow_stats *bucket;
- size_t i;
-
- memset(stats, 0, sizeof *stats);
- OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
- ovs_mutex_lock(&bucket->mutex);
- stats->n_packets += bucket->packet_count;
- stats->n_bytes += bucket->byte_count;
- stats->used = MAX(stats->used, bucket->used);
- stats->tcp_flags |= bucket->tcp_flags;
- ovs_mutex_unlock(&bucket->mutex);
- }
+ struct dp_netdev_flow *netdev_flow;
+ unsigned long long n;
+ long long used;
+ uint16_t flags;
+
+ netdev_flow = CONST_CAST(struct dp_netdev_flow *, netdev_flow_);
+
+ atomic_read_relaxed(&netdev_flow->stats.packet_count, &n);
+ stats->n_packets = n;
+ atomic_read_relaxed(&netdev_flow->stats.byte_count, &n);
+ stats->n_bytes = n;
+ atomic_read_relaxed(&netdev_flow->stats.used, &used);
+ stats->used = used;
+ atomic_read_relaxed(&netdev_flow->stats.tcp_flags, &flags);
+ stats->tcp_flags = flags;
+}
+
+/* Converts to the dpif_flow format, using 'key_buf' and 'mask_buf' for
+ * storing the netlink-formatted key/mask. 'key_buf' may be the same as
+ * 'mask_buf'. Actions will be returned without copying, by relying on RCU to
+ * protect them. */
+static void
+dp_netdev_flow_to_dpif_flow(const struct dp_netdev_flow *netdev_flow,
+ struct ofpbuf *key_buf, struct ofpbuf *mask_buf,
+ struct dpif_flow *flow, bool terse)
+{
+ if (terse) {
+ memset(flow, 0, sizeof *flow);
+ } else {
+ struct flow_wildcards wc;
+ struct dp_netdev_actions *actions;
+ size_t offset;
+ struct odp_flow_key_parms odp_parms = {
+ .flow = &netdev_flow->flow,
+ .mask = &wc.masks,
+ .recirc = true,
+ .max_mpls_depth = SIZE_MAX,
+ };
+
+ miniflow_expand(&netdev_flow->cr.mask->mf, &wc.masks);
+
+ /* Key */
+ offset = key_buf->size;
+ flow->key = ofpbuf_tail(key_buf);
+ odp_parms.odp_in_port = netdev_flow->flow.in_port.odp_port;
+ odp_flow_key_from_flow(&odp_parms, key_buf);
+ flow->key_len = key_buf->size - offset;
+
+ /* Mask */
+ offset = mask_buf->size;
+ flow->mask = ofpbuf_tail(mask_buf);
+ odp_parms.odp_in_port = wc.masks.in_port.odp_port;
+ odp_parms.key_buf = key_buf;
+ odp_flow_key_from_mask(&odp_parms, mask_buf);
+ flow->mask_len = mask_buf->size - offset;
+
+ /* Actions */
+ actions = dp_netdev_flow_get_actions(netdev_flow);
+ flow->actions = actions->actions;
+ flow->actions_len = actions->size;
+ }
+
+ flow->ufid = netdev_flow->ufid;
+ flow->ufid_present = true;
+ flow->pmd_id = netdev_flow->pmd_id;
+ get_dpif_flow_stats(netdev_flow, &flow->stats);
}
static int
if (mask_key_len) {
enum odp_key_fitness fitness;
- fitness = odp_flow_key_to_mask(mask_key, mask_key_len, mask, flow);
+ fitness = odp_flow_key_to_mask(mask_key, mask_key_len, key, key_len,
+ mask, flow);
if (fitness) {
/* This should not happen: it indicates that
* odp_flow_key_from_mask() and odp_flow_key_to_mask()
}
static int
-dpif_netdev_flow_get(const struct dpif *dpif,
- const struct nlattr *nl_key, size_t nl_key_len,
- struct ofpbuf **bufp,
- struct nlattr **maskp, size_t *mask_len,
- struct nlattr **actionsp, size_t *actions_len,
- struct dpif_flow_stats *stats)
+dpif_netdev_flow_get(const struct dpif *dpif, const struct dpif_flow_get *get)
{
struct dp_netdev *dp = get_dp_netdev(dpif);
struct dp_netdev_flow *netdev_flow;
- struct flow key;
- int error;
+ struct dp_netdev_pmd_thread *pmd;
+ unsigned pmd_id = get->pmd_id == PMD_ID_NULL
+ ? NON_PMD_CORE_ID : get->pmd_id;
+ int error = 0;
- error = dpif_netdev_flow_from_nlattrs(nl_key, nl_key_len, &key);
- if (error) {
- return error;
+ pmd = dp_netdev_get_pmd(dp, pmd_id);
+ if (!pmd) {
+ return EINVAL;
}
- netdev_flow = dp_netdev_find_flow(dp, &key);
-
+ netdev_flow = dp_netdev_pmd_find_flow(pmd, get->ufid, get->key,
+ get->key_len);
if (netdev_flow) {
- if (stats) {
- get_dpif_flow_stats(netdev_flow, stats);
- }
-
- if (maskp) {
- struct flow_wildcards wc;
-
- *bufp = ofpbuf_new(sizeof(struct odputil_keybuf));
- minimask_expand(&netdev_flow->cr.match.mask, &wc);
- odp_flow_key_from_mask(*bufp, &wc.masks, &netdev_flow->flow,
- odp_to_u32(wc.masks.in_port.odp_port),
- SIZE_MAX, true);
- *maskp = ofpbuf_data(*bufp);
- *mask_len = ofpbuf_size(*bufp);
- }
- if (actionsp) {
- struct dp_netdev_actions *actions;
-
- actions = dp_netdev_flow_get_actions(netdev_flow);
- *actionsp = actions->actions;
- *actions_len = actions->size;
- }
- } else {
+ dp_netdev_flow_to_dpif_flow(netdev_flow, get->buffer, get->buffer,
+ get->flow, false);
+ } else {
error = ENOENT;
}
+ dp_netdev_pmd_unref(pmd);
+
return error;
}
-static int
-dp_netdev_flow_add(struct dp_netdev *dp, struct match *match,
+static struct dp_netdev_flow *
+dp_netdev_flow_add(struct dp_netdev_pmd_thread *pmd,
+ struct match *match, const ovs_u128 *ufid,
const struct nlattr *actions, size_t actions_len)
- OVS_REQUIRES(dp->flow_mutex)
+ OVS_REQUIRES(pmd->flow_mutex)
{
- struct dp_netdev_flow *netdev_flow;
+ struct dp_netdev_flow *flow;
+ struct netdev_flow_key mask;
- netdev_flow = xzalloc(sizeof *netdev_flow);
- *CONST_CAST(struct flow *, &netdev_flow->flow) = match->flow;
+ netdev_flow_mask_init(&mask, match);
+ /* Make sure wc does not have metadata. */
+ ovs_assert(!(mask.mf.map & (MINIFLOW_MAP(metadata) | MINIFLOW_MAP(regs))));
- ovsthread_stats_init(&netdev_flow->stats);
+ /* Do not allocate extra space. */
+ flow = xmalloc(sizeof *flow - sizeof flow->cr.flow.mf + mask.len);
+ memset(&flow->stats, 0, sizeof flow->stats);
+ flow->dead = false;
+ flow->batch = NULL;
+ *CONST_CAST(unsigned *, &flow->pmd_id) = pmd->core_id;
+ *CONST_CAST(struct flow *, &flow->flow) = match->flow;
+ *CONST_CAST(ovs_u128 *, &flow->ufid) = *ufid;
+ ovs_refcount_init(&flow->ref_cnt);
+ ovsrcu_set(&flow->actions, dp_netdev_actions_create(actions, actions_len));
- ovsrcu_set(&netdev_flow->actions,
- dp_netdev_actions_create(actions, actions_len));
+ netdev_flow_key_init_masked(&flow->cr.flow, &match->flow, &mask);
+ dpcls_insert(&pmd->cls, &flow->cr, &mask);
- cls_rule_init(CONST_CAST(struct cls_rule *, &netdev_flow->cr),
- match, NETDEV_RULE_PRIORITY);
- cmap_insert(&dp->flow_table,
- CONST_CAST(struct cmap_node *, &netdev_flow->node),
- flow_hash(&match->flow, 0));
- classifier_insert(&dp->cls,
- CONST_CAST(struct cls_rule *, &netdev_flow->cr));
+ cmap_insert(&pmd->flow_table, CONST_CAST(struct cmap_node *, &flow->node),
+ dp_netdev_flow_hash(&flow->ufid));
- return 0;
-}
+ if (OVS_UNLIKELY(VLOG_IS_DBG_ENABLED())) {
+ struct match match;
+ struct ds ds = DS_EMPTY_INITIALIZER;
-static void
-clear_stats(struct dp_netdev_flow *netdev_flow)
-{
- struct dp_netdev_flow_stats *bucket;
- size_t i;
+ match.flow = flow->flow;
+ miniflow_expand(&flow->cr.mask->mf, &match.wc.masks);
+
+ ds_put_cstr(&ds, "flow_add: ");
+ odp_format_ufid(ufid, &ds);
+ ds_put_cstr(&ds, " ");
+ match_format(&match, &ds, OFP_DEFAULT_PRIORITY);
+ ds_put_cstr(&ds, ", actions:");
+ format_odp_actions(&ds, actions, actions_len);
+
+ VLOG_DBG_RL(&upcall_rl, "%s", ds_cstr(&ds));
- OVSTHREAD_STATS_FOR_EACH_BUCKET (bucket, i, &netdev_flow->stats) {
- ovs_mutex_lock(&bucket->mutex);
- bucket->used = 0;
- bucket->packet_count = 0;
- bucket->byte_count = 0;
- bucket->tcp_flags = 0;
- ovs_mutex_unlock(&bucket->mutex);
+ ds_destroy(&ds);
}
+
+ return flow;
}
static int
{
struct dp_netdev *dp = get_dp_netdev(dpif);
struct dp_netdev_flow *netdev_flow;
- struct miniflow miniflow;
+ struct netdev_flow_key key;
+ struct dp_netdev_pmd_thread *pmd;
struct match match;
+ ovs_u128 ufid;
+ unsigned pmd_id = put->pmd_id == PMD_ID_NULL
+ ? NON_PMD_CORE_ID : put->pmd_id;
int error;
error = dpif_netdev_flow_from_nlattrs(put->key, put->key_len, &match.flow);
if (error) {
return error;
}
- miniflow_init(&miniflow, &match.flow);
- ovs_mutex_lock(&dp->flow_mutex);
- netdev_flow = dp_netdev_lookup_flow(dp, &miniflow);
+ pmd = dp_netdev_get_pmd(dp, pmd_id);
+ if (!pmd) {
+ return EINVAL;
+ }
+
+ /* Must produce a netdev_flow_key for lookup.
+ * This interface is no longer performance critical, since it is not used
+ * for upcall processing any more. */
+ netdev_flow_key_from_flow(&key, &match.flow);
+
+ if (put->ufid) {
+ ufid = *put->ufid;
+ } else {
+ dpif_flow_hash(dpif, &match.flow, sizeof match.flow, &ufid);
+ }
+
+ ovs_mutex_lock(&pmd->flow_mutex);
+ netdev_flow = dp_netdev_pmd_lookup_flow(pmd, &key);
if (!netdev_flow) {
if (put->flags & DPIF_FP_CREATE) {
- if (cmap_count(&dp->flow_table) < MAX_FLOWS) {
+ if (cmap_count(&pmd->flow_table) < MAX_FLOWS) {
if (put->stats) {
memset(put->stats, 0, sizeof *put->stats);
}
- error = dp_netdev_flow_add(dp, &match, put->actions,
- put->actions_len);
+ dp_netdev_flow_add(pmd, &match, &ufid, put->actions,
+ put->actions_len);
+ error = 0;
} else {
error = EFBIG;
}
get_dpif_flow_stats(netdev_flow, put->stats);
}
if (put->flags & DPIF_FP_ZERO_STATS) {
- clear_stats(netdev_flow);
+ /* XXX: The userspace datapath uses thread local statistics
+ * (for flows), which should be updated only by the owning
+ * thread. Since we cannot write on stats memory here,
+ * we choose not to support this flag. Please note:
+ * - This feature is currently used only by dpctl commands with
+ * option --clear.
+ * - Should the need arise, this operation can be implemented
+ * by keeping a base value (to be update here) for each
+ * counter, and subtracting it before outputting the stats */
+ error = EOPNOTSUPP;
}
ovsrcu_postpone(dp_netdev_actions_free, old_actions);
error = EINVAL;
}
}
- ovs_mutex_unlock(&dp->flow_mutex);
- miniflow_destroy(&miniflow);
+ ovs_mutex_unlock(&pmd->flow_mutex);
+ dp_netdev_pmd_unref(pmd);
return error;
}
{
struct dp_netdev *dp = get_dp_netdev(dpif);
struct dp_netdev_flow *netdev_flow;
- struct flow key;
- int error;
+ struct dp_netdev_pmd_thread *pmd;
+ unsigned pmd_id = del->pmd_id == PMD_ID_NULL
+ ? NON_PMD_CORE_ID : del->pmd_id;
+ int error = 0;
- error = dpif_netdev_flow_from_nlattrs(del->key, del->key_len, &key);
- if (error) {
- return error;
+ pmd = dp_netdev_get_pmd(dp, pmd_id);
+ if (!pmd) {
+ return EINVAL;
}
- ovs_mutex_lock(&dp->flow_mutex);
- netdev_flow = dp_netdev_find_flow(dp, &key);
+ ovs_mutex_lock(&pmd->flow_mutex);
+ netdev_flow = dp_netdev_pmd_find_flow(pmd, del->ufid, del->key,
+ del->key_len);
if (netdev_flow) {
if (del->stats) {
get_dpif_flow_stats(netdev_flow, del->stats);
}
- dp_netdev_remove_flow(dp, netdev_flow);
+ dp_netdev_pmd_remove_flow(pmd, netdev_flow);
} else {
error = ENOENT;
}
- ovs_mutex_unlock(&dp->flow_mutex);
+ ovs_mutex_unlock(&pmd->flow_mutex);
+ dp_netdev_pmd_unref(pmd);
return error;
}
struct dpif_netdev_flow_dump {
struct dpif_flow_dump up;
- struct cmap_position pos;
+ struct cmap_position poll_thread_pos;
+ struct cmap_position flow_pos;
+ struct dp_netdev_pmd_thread *cur_pmd;
int status;
struct ovs_mutex mutex;
};
}
static struct dpif_flow_dump *
-dpif_netdev_flow_dump_create(const struct dpif *dpif_)
+dpif_netdev_flow_dump_create(const struct dpif *dpif_, bool terse)
{
struct dpif_netdev_flow_dump *dump;
- dump = xmalloc(sizeof *dump);
+ dump = xzalloc(sizeof *dump);
dpif_flow_dump_init(&dump->up, dpif_);
- memset(&dump->pos, 0, sizeof dump->pos);
- dump->status = 0;
+ dump->up.terse = terse;
ovs_mutex_init(&dump->mutex);
return &dump->up;
struct dpif_netdev_flow_dump_thread *thread
= dpif_netdev_flow_dump_thread_cast(thread_);
struct dpif_netdev_flow_dump *dump = thread->dump;
- struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
struct dp_netdev_flow *netdev_flows[FLOW_DUMP_MAX_BATCH];
- struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
int n_flows = 0;
int i;
ovs_mutex_lock(&dump->mutex);
if (!dump->status) {
- for (n_flows = 0; n_flows < MIN(max_flows, FLOW_DUMP_MAX_BATCH);
- n_flows++) {
- struct cmap_node *node;
+ struct dpif_netdev *dpif = dpif_netdev_cast(thread->up.dpif);
+ struct dp_netdev *dp = get_dp_netdev(&dpif->dpif);
+ struct dp_netdev_pmd_thread *pmd = dump->cur_pmd;
+ int flow_limit = MIN(max_flows, FLOW_DUMP_MAX_BATCH);
+
+ /* First call to dump_next(), extracts the first pmd thread.
+ * If there is no pmd thread, returns immediately. */
+ if (!pmd) {
+ pmd = dp_netdev_pmd_get_next(dp, &dump->poll_thread_pos);
+ if (!pmd) {
+ ovs_mutex_unlock(&dump->mutex);
+ return n_flows;
- node = cmap_next_position(&dp->flow_table, &dump->pos);
- if (!node) {
- dump->status = EOF;
- break;
}
- netdev_flows[n_flows] = CONTAINER_OF(node, struct dp_netdev_flow,
- node);
}
+
+ do {
+ for (n_flows = 0; n_flows < flow_limit; n_flows++) {
+ struct cmap_node *node;
+
+ node = cmap_next_position(&pmd->flow_table, &dump->flow_pos);
+ if (!node) {
+ break;
+ }
+ netdev_flows[n_flows] = CONTAINER_OF(node,
+ struct dp_netdev_flow,
+ node);
+ }
+ /* When finishing dumping the current pmd thread, moves to
+ * the next. */
+ if (n_flows < flow_limit) {
+ memset(&dump->flow_pos, 0, sizeof dump->flow_pos);
+ dp_netdev_pmd_unref(pmd);
+ pmd = dp_netdev_pmd_get_next(dp, &dump->poll_thread_pos);
+ if (!pmd) {
+ dump->status = EOF;
+ break;
+ }
+ }
+ /* Keeps the reference to next caller. */
+ dump->cur_pmd = pmd;
+
+ /* If the current dump is empty, do not exit the loop, since the
+ * remaining pmds could have flows to be dumped. Just dumps again
+ * on the new 'pmd'. */
+ } while (!n_flows);
}
ovs_mutex_unlock(&dump->mutex);
struct odputil_keybuf *keybuf = &thread->keybuf[i];
struct dp_netdev_flow *netdev_flow = netdev_flows[i];
struct dpif_flow *f = &flows[i];
- struct dp_netdev_actions *dp_actions;
- struct flow_wildcards wc;
- struct ofpbuf buf;
-
- minimask_expand(&netdev_flow->cr.match.mask, &wc);
-
- /* Key. */
- ofpbuf_use_stack(&buf, keybuf, sizeof *keybuf);
- odp_flow_key_from_flow(&buf, &netdev_flow->flow, &wc.masks,
- netdev_flow->flow.in_port.odp_port, true);
- f->key = ofpbuf_data(&buf);
- f->key_len = ofpbuf_size(&buf);
-
- /* Mask. */
- ofpbuf_use_stack(&buf, maskbuf, sizeof *maskbuf);
- odp_flow_key_from_mask(&buf, &wc.masks, &netdev_flow->flow,
- odp_to_u32(wc.masks.in_port.odp_port),
- SIZE_MAX, true);
- f->mask = ofpbuf_data(&buf);
- f->mask_len = ofpbuf_size(&buf);
+ struct ofpbuf key, mask;
- /* Actions. */
- dp_actions = dp_netdev_flow_get_actions(netdev_flow);
- f->actions = dp_actions->actions;
- f->actions_len = dp_actions->size;
-
- /* Stats. */
- get_dpif_flow_stats(netdev_flow, &f->stats);
+ ofpbuf_use_stack(&key, keybuf, sizeof *keybuf);
+ ofpbuf_use_stack(&mask, maskbuf, sizeof *maskbuf);
+ dp_netdev_flow_to_dpif_flow(netdev_flow, &key, &mask, f,
+ dump->up.terse);
}
return n_flows;
static int
dpif_netdev_execute(struct dpif *dpif, struct dpif_execute *execute)
+ OVS_NO_THREAD_SAFETY_ANALYSIS
{
struct dp_netdev *dp = get_dp_netdev(dpif);
- struct dpif_packet packet, *pp;
- struct pkt_metadata *md = &execute->md;
+ struct dp_netdev_pmd_thread *pmd;
+ struct dp_packet *pp;
- if (ofpbuf_size(execute->packet) < ETH_HEADER_LEN ||
- ofpbuf_size(execute->packet) > UINT16_MAX) {
+ if (dp_packet_size(execute->packet) < ETH_HEADER_LEN ||
+ dp_packet_size(execute->packet) > UINT16_MAX) {
return EINVAL;
}
- packet.ofpbuf = *execute->packet;
- pp = &packet;
+ /* Tries finding the 'pmd'. If NULL is returned, that means
+ * the current thread is a non-pmd thread and should use
+ * dp_netdev_get_pmd(dp, NON_PMD_CORE_ID). */
+ pmd = ovsthread_getspecific(dp->per_pmd_key);
+ if (!pmd) {
+ pmd = dp_netdev_get_pmd(dp, NON_PMD_CORE_ID);
+ }
+
+ /* If the current thread is non-pmd thread, acquires
+ * the 'non_pmd_mutex'. */
+ if (pmd->core_id == NON_PMD_CORE_ID) {
+ ovs_mutex_lock(&dp->non_pmd_mutex);
+ ovs_mutex_lock(&dp->port_mutex);
+ }
+
+ pp = execute->packet;
+ dp_netdev_execute_actions(pmd, &pp, 1, false, execute->actions,
+ execute->actions_len);
+ if (pmd->core_id == NON_PMD_CORE_ID) {
+ dp_netdev_pmd_unref(pmd);
+ ovs_mutex_unlock(&dp->port_mutex);
+ ovs_mutex_unlock(&dp->non_pmd_mutex);
+ }
+
+ return 0;
+}
+
+static void
+dpif_netdev_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops)
+{
+ size_t i;
+
+ for (i = 0; i < n_ops; i++) {
+ struct dpif_op *op = ops[i];
+
+ switch (op->type) {
+ case DPIF_OP_FLOW_PUT:
+ op->error = dpif_netdev_flow_put(dpif, &op->u.flow_put);
+ break;
+
+ case DPIF_OP_FLOW_DEL:
+ op->error = dpif_netdev_flow_del(dpif, &op->u.flow_del);
+ break;
+
+ case DPIF_OP_EXECUTE:
+ op->error = dpif_netdev_execute(dpif, &op->u.execute);
+ break;
+
+ case DPIF_OP_FLOW_GET:
+ op->error = dpif_netdev_flow_get(dpif, &op->u.flow_get);
+ break;
+ }
+ }
+}
+
+/* Returns true if the configuration for rx queues or cpu mask
+ * is changed. */
+static bool
+pmd_config_changed(const struct dp_netdev *dp, size_t rxqs, const char *cmask)
+{
+ if (dp->n_dpdk_rxqs != rxqs) {
+ return true;
+ } else {
+ if (dp->pmd_cmask != NULL && cmask != NULL) {
+ return strcmp(dp->pmd_cmask, cmask);
+ } else {
+ return (dp->pmd_cmask != NULL || cmask != NULL);
+ }
+ }
+}
+
+/* Resets pmd threads if the configuration for 'rxq's or cpu mask changes. */
+static int
+dpif_netdev_pmd_set(struct dpif *dpif, unsigned int n_rxqs, const char *cmask)
+{
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+
+ if (pmd_config_changed(dp, n_rxqs, cmask)) {
+ struct dp_netdev_port *port;
+
+ dp_netdev_destroy_all_pmds(dp);
+
+ CMAP_FOR_EACH (port, node, &dp->ports) {
+ if (netdev_is_pmd(port->netdev)) {
+ int i, err;
+
+ /* Closes the existing 'rxq's. */
+ for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
+ netdev_rxq_close(port->rxq[i]);
+ port->rxq[i] = NULL;
+ }
+
+ /* Sets the new rx queue config. */
+ err = netdev_set_multiq(port->netdev,
+ ovs_numa_get_n_cores() + 1,
+ n_rxqs);
+ if (err && (err != EOPNOTSUPP)) {
+ VLOG_ERR("Failed to set dpdk interface %s rx_queue to:"
+ " %u", netdev_get_name(port->netdev),
+ n_rxqs);
+ return err;
+ }
+
+ /* If the set_multiq() above succeeds, reopens the 'rxq's. */
+ port->rxq = xrealloc(port->rxq, sizeof *port->rxq
+ * netdev_n_rxq(port->netdev));
+ for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
+ netdev_rxq_open(port->netdev, &port->rxq[i], i);
+ }
+ }
+ }
+ dp->n_dpdk_rxqs = n_rxqs;
- dp_netdev_execute_actions(dp, &pp, 1, false, md,
- execute->actions, execute->actions_len);
+ /* Reconfigures the cpu mask. */
+ ovs_numa_set_cpu_mask(cmask);
+ free(dp->pmd_cmask);
+ dp->pmd_cmask = cmask ? xstrdup(cmask) : NULL;
- /* Even though may_steal is set to false, some actions could modify or
- * reallocate the ofpbuf memory. We need to pass those changes to the
- * caller */
- *execute->packet = packet.ofpbuf;
+ /* Restores the non-pmd. */
+ dp_netdev_set_nonpmd(dp);
+ /* Restores all pmd threads. */
+ dp_netdev_reset_pmd_threads(dp);
+ }
return 0;
}
}
\f
-/* Creates and returns a new 'struct dp_netdev_actions', with a reference count
- * of 1, whose actions are a copy of from the 'ofpacts_len' bytes of
- * 'ofpacts'. */
+/* Creates and returns a new 'struct dp_netdev_actions', whose actions are
+ * a copy of the 'ofpacts_len' bytes of 'ofpacts'. */
struct dp_netdev_actions *
dp_netdev_actions_create(const struct nlattr *actions, size_t size)
{
struct dp_netdev_actions *netdev_actions;
- netdev_actions = xmalloc(sizeof *netdev_actions);
- netdev_actions->actions = xmemdup(actions, size);
+ netdev_actions = xmalloc(sizeof *netdev_actions + size);
+ memcpy(netdev_actions->actions, actions, size);
netdev_actions->size = size;
return netdev_actions;
static void
dp_netdev_actions_free(struct dp_netdev_actions *actions)
{
- free(actions->actions);
free(actions);
}
\f
+static inline unsigned long long
+cycles_counter(void)
+{
+#ifdef DPDK_NETDEV
+ return rte_get_tsc_cycles();
+#else
+ return 0;
+#endif
+}
+
+/* Fake mutex to make sure that the calls to cycles_count_* are balanced */
+extern struct ovs_mutex cycles_counter_fake_mutex;
+
+/* Start counting cycles. Must be followed by 'cycles_count_end()' */
+static inline void
+cycles_count_start(struct dp_netdev_pmd_thread *pmd)
+ OVS_ACQUIRES(&cycles_counter_fake_mutex)
+ OVS_NO_THREAD_SAFETY_ANALYSIS
+{
+ pmd->last_cycles = cycles_counter();
+}
+
+/* Stop counting cycles and add them to the counter 'type' */
+static inline void
+cycles_count_end(struct dp_netdev_pmd_thread *pmd,
+ enum pmd_cycles_counter_type type)
+ OVS_RELEASES(&cycles_counter_fake_mutex)
+ OVS_NO_THREAD_SAFETY_ANALYSIS
+{
+ unsigned long long interval = cycles_counter() - pmd->last_cycles;
+
+ non_atomic_ullong_add(&pmd->cycles.n[type], interval);
+}
static void
-dp_netdev_process_rxq_port(struct dp_netdev *dp,
- struct dp_netdev_port *port,
- struct netdev_rxq *rxq)
+dp_netdev_process_rxq_port(struct dp_netdev_pmd_thread *pmd,
+ struct dp_netdev_port *port,
+ struct netdev_rxq *rxq)
{
- struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
+ struct dp_packet *packets[NETDEV_MAX_BURST];
int error, cnt;
+ cycles_count_start(pmd);
error = netdev_rxq_recv(rxq, packets, &cnt);
+ cycles_count_end(pmd, PMD_CYCLES_POLLING);
if (!error) {
- dp_netdev_port_input(dp, packets, cnt, port->port_no);
+ int i;
+
+ *recirc_depth_get() = 0;
+
+ /* XXX: initialize md in netdev implementation. */
+ for (i = 0; i < cnt; i++) {
+ pkt_metadata_init(&packets[i]->md, port->port_no);
+ }
+ cycles_count_start(pmd);
+ dp_netdev_input(pmd, packets, cnt);
+ cycles_count_end(pmd, PMD_CYCLES_PROCESSING);
} else if (error != EAGAIN && error != EOPNOTSUPP) {
- static struct vlog_rate_limit rl
- = VLOG_RATE_LIMIT_INIT(1, 5);
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
- netdev_get_name(port->netdev),
- ovs_strerror(error));
+ netdev_get_name(port->netdev), ovs_strerror(error));
}
}
-static void
+/* Return true if needs to revalidate datapath flows. */
+static bool
dpif_netdev_run(struct dpif *dpif)
{
struct dp_netdev_port *port;
struct dp_netdev *dp = get_dp_netdev(dpif);
+ struct dp_netdev_pmd_thread *non_pmd = dp_netdev_get_pmd(dp,
+ NON_PMD_CORE_ID);
+ uint64_t new_tnl_seq;
+ ovs_mutex_lock(&dp->non_pmd_mutex);
CMAP_FOR_EACH (port, node, &dp->ports) {
if (!netdev_is_pmd(port->netdev)) {
int i;
for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
- dp_netdev_process_rxq_port(dp, port, port->rxq[i]);
+ dp_netdev_process_rxq_port(non_pmd, port, port->rxq[i]);
}
}
}
+ ovs_mutex_unlock(&dp->non_pmd_mutex);
+ dp_netdev_pmd_unref(non_pmd);
+
+ tnl_arp_cache_run();
+ new_tnl_seq = seq_read(tnl_conf_seq);
+
+ if (dp->last_tnl_conf_seq != new_tnl_seq) {
+ dp->last_tnl_conf_seq = new_tnl_seq;
+ return true;
+ }
+ return false;
}
static void
}
}
ovs_mutex_unlock(&dp_netdev_mutex);
+ seq_wait(tnl_conf_seq, dp->last_tnl_conf_seq);
}
struct rxq_poll {
};
static int
-pmd_load_queues(struct pmd_thread *f,
+pmd_load_queues(struct dp_netdev_pmd_thread *pmd,
struct rxq_poll **ppoll_list, int poll_cnt)
{
- struct dp_netdev *dp = f->dp;
struct rxq_poll *poll_list = *ppoll_list;
struct dp_netdev_port *port;
- int id = f->id;
- int index;
- int i;
+ int n_pmds_on_numa, index, i;
/* Simple scheduler for netdev rx polling. */
for (i = 0; i < poll_cnt; i++) {
- port_unref(poll_list[i].port);
+ port_unref(poll_list[i].port);
}
poll_cnt = 0;
+ n_pmds_on_numa = get_n_pmd_threads_on_numa(pmd->dp, pmd->numa_id);
index = 0;
- CMAP_FOR_EACH (port, node, &f->dp->ports) {
- if (netdev_is_pmd(port->netdev)) {
- int i;
-
- for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
- if ((index % dp->n_pmd_threads) == id) {
- poll_list = xrealloc(poll_list, sizeof *poll_list * (poll_cnt + 1));
-
- port_ref(port);
- poll_list[poll_cnt].port = port;
- poll_list[poll_cnt].rx = port->rxq[i];
- poll_cnt++;
+ CMAP_FOR_EACH (port, node, &pmd->dp->ports) {
+ /* Calls port_try_ref() to prevent the main thread
+ * from deleting the port. */
+ if (port_try_ref(port)) {
+ if (netdev_is_pmd(port->netdev)
+ && netdev_get_numa_id(port->netdev) == pmd->numa_id) {
+ int i;
+
+ for (i = 0; i < netdev_n_rxq(port->netdev); i++) {
+ if ((index % n_pmds_on_numa) == pmd->index) {
+ poll_list = xrealloc(poll_list,
+ sizeof *poll_list * (poll_cnt + 1));
+
+ port_ref(port);
+ poll_list[poll_cnt].port = port;
+ poll_list[poll_cnt].rx = port->rxq[i];
+ poll_cnt++;
+ }
+ index++;
}
- index++;
}
+ /* Unrefs the port_try_ref(). */
+ port_unref(port);
}
}
static void *
pmd_thread_main(void *f_)
{
- struct pmd_thread *f = f_;
- struct dp_netdev *dp = f->dp;
+ struct dp_netdev_pmd_thread *pmd = f_;
unsigned int lc = 0;
struct rxq_poll *poll_list;
- unsigned int port_seq;
+ unsigned int port_seq = PMD_INITIAL_SEQ;
int poll_cnt;
int i;
poll_cnt = 0;
poll_list = NULL;
- pmd_thread_setaffinity_cpu(f->id);
+ /* Stores the pmd thread's 'pmd' to 'per_pmd_key'. */
+ ovsthread_setspecific(pmd->dp->per_pmd_key, pmd);
+ pmd_thread_setaffinity_cpu(pmd->core_id);
reload:
- poll_cnt = pmd_load_queues(f, &poll_list, poll_cnt);
- atomic_read(&f->change_seq, &port_seq);
+ emc_cache_init(&pmd->flow_cache);
+ poll_cnt = pmd_load_queues(pmd, &poll_list, poll_cnt);
+
+ /* List port/core affinity */
+ for (i = 0; i < poll_cnt; i++) {
+ VLOG_INFO("Core %d processing port \'%s\'\n", pmd->core_id, netdev_get_name(poll_list[i].port->netdev));
+ }
+
+ /* Signal here to make sure the pmd finishes
+ * reloading the updated configuration. */
+ dp_netdev_pmd_reload_done(pmd);
for (;;) {
- unsigned int c_port_seq;
int i;
for (i = 0; i < poll_cnt; i++) {
- dp_netdev_process_rxq_port(dp, poll_list[i].port, poll_list[i].rx);
+ dp_netdev_process_rxq_port(pmd, poll_list[i].port, poll_list[i].rx);
}
if (lc++ > 1024) {
- ovsrcu_quiesce();
+ unsigned int seq;
- /* XXX: need completely userspace based signaling method.
- * to keep this thread entirely in userspace.
- * For now using atomic counter. */
lc = 0;
- atomic_read_explicit(&f->change_seq, &c_port_seq, memory_order_consume);
- if (c_port_seq != port_seq) {
+
+ emc_cache_slow_sweep(&pmd->flow_cache);
+ ovsrcu_quiesce();
+
+ atomic_read_relaxed(&pmd->change_seq, &seq);
+ if (seq != port_seq) {
+ port_seq = seq;
break;
}
}
}
- if (!latch_is_set(&f->dp->exit_latch)){
+ emc_cache_uninit(&pmd->flow_cache);
+
+ if (!latch_is_set(&pmd->exit_latch)){
goto reload;
}
port_unref(poll_list[i].port);
}
+ dp_netdev_pmd_reload_done(pmd);
+
free(poll_list);
return NULL;
}
dp_netdev_enable_upcall(dp);
}
-static void
-dp_netdev_set_pmd_threads(struct dp_netdev *dp, int n)
+void
+dp_netdev_pmd_reload_done(struct dp_netdev_pmd_thread *pmd)
{
- int i;
+ ovs_mutex_lock(&pmd->cond_mutex);
+ xpthread_cond_signal(&pmd->cond);
+ ovs_mutex_unlock(&pmd->cond_mutex);
+}
- if (n == dp->n_pmd_threads) {
- return;
+/* Finds and refs the dp_netdev_pmd_thread on core 'core_id'. Returns
+ * the pointer if succeeds, otherwise, NULL.
+ *
+ * Caller must unrefs the returned reference. */
+static struct dp_netdev_pmd_thread *
+dp_netdev_get_pmd(struct dp_netdev *dp, unsigned core_id)
+{
+ struct dp_netdev_pmd_thread *pmd;
+ const struct cmap_node *pnode;
+
+ pnode = cmap_find(&dp->poll_threads, hash_int(core_id, 0));
+ if (!pnode) {
+ return NULL;
}
+ pmd = CONTAINER_OF(pnode, struct dp_netdev_pmd_thread, node);
+
+ return dp_netdev_pmd_try_ref(pmd) ? pmd : NULL;
+}
+
+/* Sets the 'struct dp_netdev_pmd_thread' for non-pmd threads. */
+static void
+dp_netdev_set_nonpmd(struct dp_netdev *dp)
+{
+ struct dp_netdev_pmd_thread *non_pmd;
+
+ non_pmd = xzalloc(sizeof *non_pmd);
+ dp_netdev_configure_pmd(non_pmd, dp, 0, NON_PMD_CORE_ID,
+ OVS_NUMA_UNSPEC);
+}
- /* Stop existing threads. */
- latch_set(&dp->exit_latch);
- dp_netdev_reload_pmd_threads(dp);
- for (i = 0; i < dp->n_pmd_threads; i++) {
- struct pmd_thread *f = &dp->pmd_threads[i];
+/* Caller must have valid pointer to 'pmd'. */
+static bool
+dp_netdev_pmd_try_ref(struct dp_netdev_pmd_thread *pmd)
+{
+ return ovs_refcount_try_ref_rcu(&pmd->ref_cnt);
+}
- xpthread_join(f->thread, NULL);
+static void
+dp_netdev_pmd_unref(struct dp_netdev_pmd_thread *pmd)
+{
+ if (pmd && ovs_refcount_unref(&pmd->ref_cnt) == 1) {
+ ovsrcu_postpone(dp_netdev_destroy_pmd, pmd);
}
- latch_poll(&dp->exit_latch);
- free(dp->pmd_threads);
+}
- /* Start new threads. */
- dp->pmd_threads = xmalloc(n * sizeof *dp->pmd_threads);
- dp->n_pmd_threads = n;
+/* Given cmap position 'pos', tries to ref the next node. If try_ref()
+ * fails, keeps checking for next node until reaching the end of cmap.
+ *
+ * Caller must unrefs the returned reference. */
+static struct dp_netdev_pmd_thread *
+dp_netdev_pmd_get_next(struct dp_netdev *dp, struct cmap_position *pos)
+{
+ struct dp_netdev_pmd_thread *next;
+
+ do {
+ struct cmap_node *node;
- for (i = 0; i < n; i++) {
- struct pmd_thread *f = &dp->pmd_threads[i];
+ node = cmap_next_position(&dp->poll_threads, pos);
+ next = node ? CONTAINER_OF(node, struct dp_netdev_pmd_thread, node)
+ : NULL;
+ } while (next && !dp_netdev_pmd_try_ref(next));
- f->dp = dp;
- f->id = i;
- atomic_store(&f->change_seq, 1);
+ return next;
+}
- /* Each thread will distribute all devices rx-queues among
- * themselves. */
- f->thread = ovs_thread_create("pmd", pmd_thread_main, f);
+static int
+core_id_to_qid(unsigned core_id)
+{
+ if (core_id != NON_PMD_CORE_ID) {
+ return core_id;
+ } else {
+ return ovs_numa_get_n_cores();
}
}
-\f
-static void *
-dp_netdev_flow_stats_new_cb(void)
+/* Configures the 'pmd' based on the input argument. */
+static void
+dp_netdev_configure_pmd(struct dp_netdev_pmd_thread *pmd, struct dp_netdev *dp,
+ int index, unsigned core_id, int numa_id)
+{
+ pmd->dp = dp;
+ pmd->index = index;
+ pmd->core_id = core_id;
+ pmd->tx_qid = core_id_to_qid(core_id);
+ pmd->numa_id = numa_id;
+
+ ovs_refcount_init(&pmd->ref_cnt);
+ latch_init(&pmd->exit_latch);
+ atomic_init(&pmd->change_seq, PMD_INITIAL_SEQ);
+ xpthread_cond_init(&pmd->cond, NULL);
+ ovs_mutex_init(&pmd->cond_mutex);
+ ovs_mutex_init(&pmd->flow_mutex);
+ dpcls_init(&pmd->cls);
+ cmap_init(&pmd->flow_table);
+ /* init the 'flow_cache' since there is no
+ * actual thread created for NON_PMD_CORE_ID. */
+ if (core_id == NON_PMD_CORE_ID) {
+ emc_cache_init(&pmd->flow_cache);
+ }
+ cmap_insert(&dp->poll_threads, CONST_CAST(struct cmap_node *, &pmd->node),
+ hash_int(core_id, 0));
+}
+
+static void
+dp_netdev_destroy_pmd(struct dp_netdev_pmd_thread *pmd)
{
- struct dp_netdev_flow_stats *bucket = xzalloc_cacheline(sizeof *bucket);
- ovs_mutex_init(&bucket->mutex);
- return bucket;
+ dp_netdev_pmd_flow_flush(pmd);
+ dpcls_destroy(&pmd->cls);
+ cmap_destroy(&pmd->flow_table);
+ ovs_mutex_destroy(&pmd->flow_mutex);
+ latch_destroy(&pmd->exit_latch);
+ xpthread_cond_destroy(&pmd->cond);
+ ovs_mutex_destroy(&pmd->cond_mutex);
+ free(pmd);
}
+/* Stops the pmd thread, removes it from the 'dp->poll_threads',
+ * and unrefs the struct. */
static void
-dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow,
- int cnt, int size,
- uint16_t tcp_flags)
+dp_netdev_del_pmd(struct dp_netdev_pmd_thread *pmd)
{
- long long int now = time_msec();
- struct dp_netdev_flow_stats *bucket;
+ /* Uninit the 'flow_cache' since there is
+ * no actual thread uninit it for NON_PMD_CORE_ID. */
+ if (pmd->core_id == NON_PMD_CORE_ID) {
+ emc_cache_uninit(&pmd->flow_cache);
+ } else {
+ latch_set(&pmd->exit_latch);
+ dp_netdev_reload_pmd__(pmd);
+ ovs_numa_unpin_core(pmd->core_id);
+ xpthread_join(pmd->thread, NULL);
+ }
+ cmap_remove(&pmd->dp->poll_threads, &pmd->node, hash_int(pmd->core_id, 0));
+ dp_netdev_pmd_unref(pmd);
+}
- bucket = ovsthread_stats_bucket_get(&netdev_flow->stats,
- dp_netdev_flow_stats_new_cb);
+/* Destroys all pmd threads. */
+static void
+dp_netdev_destroy_all_pmds(struct dp_netdev *dp)
+{
+ struct dp_netdev_pmd_thread *pmd;
- ovs_mutex_lock(&bucket->mutex);
- bucket->used = MAX(now, bucket->used);
- bucket->packet_count += cnt;
- bucket->byte_count += size;
- bucket->tcp_flags |= tcp_flags;
- ovs_mutex_unlock(&bucket->mutex);
+ CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
+ dp_netdev_del_pmd(pmd);
+ }
}
-static void *
-dp_netdev_stats_new_cb(void)
+/* Deletes all pmd threads on numa node 'numa_id'. */
+static void
+dp_netdev_del_pmds_on_numa(struct dp_netdev *dp, int numa_id)
{
- struct dp_netdev_stats *bucket = xzalloc_cacheline(sizeof *bucket);
- ovs_mutex_init(&bucket->mutex);
- return bucket;
+ struct dp_netdev_pmd_thread *pmd;
+
+ CMAP_FOR_EACH (pmd, node, &dp->poll_threads) {
+ if (pmd->numa_id == numa_id) {
+ dp_netdev_del_pmd(pmd);
+ }
+ }
}
+/* Checks the numa node id of 'netdev' and starts pmd threads for
+ * the numa node. */
static void
-dp_netdev_count_packet(struct dp_netdev *dp, enum dp_stat_type type, int cnt)
+dp_netdev_set_pmds_on_numa(struct dp_netdev *dp, int numa_id)
{
- struct dp_netdev_stats *bucket;
+ int n_pmds;
+
+ if (!ovs_numa_numa_id_is_valid(numa_id)) {
+ VLOG_ERR("Cannot create pmd threads due to numa id (%d)"
+ "invalid", numa_id);
+ return ;
+ }
+
+ n_pmds = get_n_pmd_threads_on_numa(dp, numa_id);
+
+ /* If there are already pmd threads created for the numa node
+ * in which 'netdev' is on, do nothing. Else, creates the
+ * pmd threads for the numa node. */
+ if (!n_pmds) {
+ int can_have, n_unpinned, i;
+
+ n_unpinned = ovs_numa_get_n_unpinned_cores_on_numa(numa_id);
+ if (!n_unpinned) {
+ VLOG_ERR("Cannot create pmd threads due to out of unpinned "
+ "cores on numa node");
+ return;
+ }
- bucket = ovsthread_stats_bucket_get(&dp->stats, dp_netdev_stats_new_cb);
- ovs_mutex_lock(&bucket->mutex);
- bucket->n[type] += cnt;
- ovs_mutex_unlock(&bucket->mutex);
+ /* If cpu mask is specified, uses all unpinned cores, otherwise
+ * tries creating NR_PMD_THREADS pmd threads. */
+ can_have = dp->pmd_cmask ? n_unpinned : MIN(n_unpinned, NR_PMD_THREADS);
+ for (i = 0; i < can_have; i++) {
+ struct dp_netdev_pmd_thread *pmd = xzalloc(sizeof *pmd);
+ unsigned core_id = ovs_numa_get_unpinned_core_on_numa(numa_id);
+
+ dp_netdev_configure_pmd(pmd, dp, i, core_id, numa_id);
+ /* Each thread will distribute all devices rx-queues among
+ * themselves. */
+ pmd->thread = ovs_thread_create("pmd", pmd_thread_main, pmd);
+ }
+ VLOG_INFO("Created %d pmd threads on numa node %d", can_have, numa_id);
+ }
+}
+
+\f
+/* Called after pmd threads config change. Restarts pmd threads with
+ * new configuration. */
+static void
+dp_netdev_reset_pmd_threads(struct dp_netdev *dp)
+{
+ struct dp_netdev_port *port;
+
+ CMAP_FOR_EACH (port, node, &dp->ports) {
+ if (netdev_is_pmd(port->netdev)) {
+ int numa_id = netdev_get_numa_id(port->netdev);
+
+ dp_netdev_set_pmds_on_numa(dp, numa_id);
+ }
+ }
+}
+
+static char *
+dpif_netdev_get_datapath_version(void)
+{
+ return xstrdup("<built-in>");
+}
+
+static void
+dp_netdev_flow_used(struct dp_netdev_flow *netdev_flow, int cnt, int size,
+ uint16_t tcp_flags, long long now)
+{
+ uint16_t flags;
+
+ atomic_store_relaxed(&netdev_flow->stats.used, now);
+ non_atomic_ullong_add(&netdev_flow->stats.packet_count, cnt);
+ non_atomic_ullong_add(&netdev_flow->stats.byte_count, size);
+ atomic_read_relaxed(&netdev_flow->stats.tcp_flags, &flags);
+ flags |= tcp_flags;
+ atomic_store_relaxed(&netdev_flow->stats.tcp_flags, flags);
+}
+
+static void
+dp_netdev_count_packet(struct dp_netdev_pmd_thread *pmd,
+ enum dp_stat_type type, int cnt)
+{
+ non_atomic_ullong_add(&pmd->stats.n[type], cnt);
+}
+
+static int
+dp_netdev_upcall(struct dp_netdev_pmd_thread *pmd, struct dp_packet *packet_,
+ struct flow *flow, struct flow_wildcards *wc, ovs_u128 *ufid,
+ enum dpif_upcall_type type, const struct nlattr *userdata,
+ struct ofpbuf *actions, struct ofpbuf *put_actions)
+{
+ struct dp_netdev *dp = pmd->dp;
+
+ if (OVS_UNLIKELY(!dp->upcall_cb)) {
+ return ENODEV;
+ }
+
+ if (OVS_UNLIKELY(!VLOG_DROP_DBG(&upcall_rl))) {
+ struct ds ds = DS_EMPTY_INITIALIZER;
+ char *packet_str;
+ struct ofpbuf key;
+ struct odp_flow_key_parms odp_parms = {
+ .flow = flow,
+ .mask = &wc->masks,
+ .odp_in_port = flow->in_port.odp_port,
+ .recirc = true,
+ };
+
+ ofpbuf_init(&key, 0);
+ odp_flow_key_from_flow(&odp_parms, &key);
+ packet_str = ofp_packet_to_string(dp_packet_data(packet_),
+ dp_packet_size(packet_));
+
+ odp_flow_key_format(key.data, key.size, &ds);
+
+ VLOG_DBG("%s: %s upcall:\n%s\n%s", dp->name,
+ dpif_upcall_type_to_string(type), ds_cstr(&ds), packet_str);
+
+ ofpbuf_uninit(&key);
+ free(packet_str);
+
+ ds_destroy(&ds);
+ }
+
+ return dp->upcall_cb(packet_, flow, ufid, pmd->core_id, type, userdata,
+ actions, wc, put_actions, dp->upcall_aux);
+}
+
+static inline uint32_t
+dpif_netdev_packet_get_rss_hash(struct dp_packet *packet,
+ const struct miniflow *mf)
+{
+ uint32_t hash, recirc_depth;
+
+ hash = dp_packet_get_rss_hash(packet);
+ if (OVS_UNLIKELY(!hash)) {
+ hash = miniflow_hash_5tuple(mf, 0);
+ dp_packet_set_rss_hash(packet, hash);
+ }
+
+ /* The RSS hash must account for the recirculation depth to avoid
+ * collisions in the exact match cache */
+ recirc_depth = *recirc_depth_get_unsafe();
+ if (OVS_UNLIKELY(recirc_depth)) {
+ hash = hash_finish(hash, recirc_depth);
+ dp_packet_set_rss_hash(packet, hash);
+ }
+ return hash;
}
struct packet_batch {
struct dp_netdev_flow *flow;
- struct dpif_packet *packets[NETDEV_MAX_RX_BATCH];
- struct pkt_metadata md;
+ struct dp_packet *packets[NETDEV_MAX_BURST];
};
static inline void
-packet_batch_update(struct packet_batch *batch,
- struct dpif_packet *packet, const struct miniflow *mf)
+packet_batch_update(struct packet_batch *batch, struct dp_packet *packet,
+ const struct miniflow *mf)
{
batch->tcp_flags |= miniflow_get_tcp_flags(mf);
batch->packets[batch->packet_count++] = packet;
- batch->byte_count += ofpbuf_size(&packet->ofpbuf);
+ batch->byte_count += dp_packet_size(packet);
}
static inline void
-packet_batch_init(struct packet_batch *batch, struct dp_netdev_flow *flow,
- struct pkt_metadata *md)
+packet_batch_init(struct packet_batch *batch, struct dp_netdev_flow *flow)
{
- batch->flow = flow;
- batch->md = *md;
+ flow->batch = batch;
+ batch->flow = flow;
batch->packet_count = 0;
batch->byte_count = 0;
batch->tcp_flags = 0;
}
static inline void
-packet_batch_execute(struct packet_batch *batch, struct dp_netdev *dp)
+packet_batch_execute(struct packet_batch *batch,
+ struct dp_netdev_pmd_thread *pmd,
+ long long now)
{
struct dp_netdev_actions *actions;
struct dp_netdev_flow *flow = batch->flow;
- dp_netdev_flow_used(batch->flow, batch->packet_count, batch->byte_count,
- batch->tcp_flags);
+ dp_netdev_flow_used(flow, batch->packet_count, batch->byte_count,
+ batch->tcp_flags, now);
actions = dp_netdev_flow_get_actions(flow);
- dp_netdev_execute_actions(dp, batch->packets,
- batch->packet_count, true, &batch->md,
+ dp_netdev_execute_actions(pmd, batch->packets, batch->packet_count, true,
actions->actions, actions->size);
+}
+
+static inline void
+dp_netdev_queue_batches(struct dp_packet *pkt,
+ struct dp_netdev_flow *flow, const struct miniflow *mf,
+ struct packet_batch *batches, size_t *n_batches)
+{
+ struct packet_batch *batch = flow->batch;
+
+ if (OVS_LIKELY(batch)) {
+ packet_batch_update(batch, pkt, mf);
+ return;
+ }
- dp_netdev_count_packet(dp, DP_STAT_HIT, batch->packet_count);
+ batch = &batches[(*n_batches)++];
+ packet_batch_init(batch, flow);
+ packet_batch_update(batch, pkt, mf);
}
-static void
-dp_netdev_input(struct dp_netdev *dp, struct dpif_packet **packets, int cnt,
- struct pkt_metadata *md)
+static inline void
+dp_packet_swap(struct dp_packet **a, struct dp_packet **b)
{
- struct dp_netdev_queue q = DP_NETDEV_QUEUE_INITIALIZER;
- struct packet_batch batches[NETDEV_MAX_RX_BATCH];
- struct netdev_flow_key keys[NETDEV_MAX_RX_BATCH];
- const struct miniflow *mfs[NETDEV_MAX_RX_BATCH]; /* NULL at bad packets. */
- struct cls_rule *rules[NETDEV_MAX_RX_BATCH];
- size_t n_batches, i;
+ struct dp_packet *tmp = *a;
+ *a = *b;
+ *b = tmp;
+}
+/* Try to process all ('cnt') the 'packets' using only the exact match cache
+ * 'flow_cache'. If a flow is not found for a packet 'packets[i]', the
+ * miniflow is copied into 'keys' and the packet pointer is moved at the
+ * beginning of the 'packets' array.
+ *
+ * The function returns the number of packets that needs to be processed in the
+ * 'packets' array (they have been moved to the beginning of the vector).
+ */
+static inline size_t
+emc_processing(struct dp_netdev_pmd_thread *pmd, struct dp_packet **packets,
+ size_t cnt, struct netdev_flow_key *keys,
+ struct packet_batch batches[], size_t *n_batches)
+{
+ struct emc_cache *flow_cache = &pmd->flow_cache;
+ struct netdev_flow_key key;
+ size_t i, notfound_cnt = 0;
+
+ miniflow_initialize(&key.mf, key.buf);
for (i = 0; i < cnt; i++) {
- if (OVS_UNLIKELY(ofpbuf_size(&packets[i]->ofpbuf) < ETH_HEADER_LEN)) {
- dpif_packet_delete(packets[i]);
- mfs[i] = NULL;
+ struct dp_netdev_flow *flow;
+
+ if (OVS_UNLIKELY(dp_packet_size(packets[i]) < ETH_HEADER_LEN)) {
+ dp_packet_delete(packets[i]);
continue;
}
- miniflow_initialize(&keys[i].flow, keys[i].buf);
- miniflow_extract(&packets[i]->ofpbuf, md, &keys[i].flow);
- mfs[i] = &keys[i].flow;
+ if (i != cnt - 1) {
+ /* Prefetch next packet data */
+ OVS_PREFETCH(dp_packet_data(packets[i+1]));
+ }
+
+ miniflow_extract(packets[i], &key.mf);
+ key.len = 0; /* Not computed yet. */
+ key.hash = dpif_netdev_packet_get_rss_hash(packets[i], &key.mf);
+
+ flow = emc_lookup(flow_cache, &key);
+ if (OVS_LIKELY(flow)) {
+ dp_netdev_queue_batches(packets[i], flow, &key.mf, batches,
+ n_batches);
+ } else {
+ if (i != notfound_cnt) {
+ dp_packet_swap(&packets[i], &packets[notfound_cnt]);
+ }
+
+ keys[notfound_cnt++] = key;
+ }
}
- classifier_lookup_miniflow_batch(&dp->cls, mfs, rules, cnt);
+ dp_netdev_count_packet(pmd, DP_STAT_EXACT_HIT, cnt - notfound_cnt);
+
+ return notfound_cnt;
+}
+
+static inline void
+fast_path_processing(struct dp_netdev_pmd_thread *pmd,
+ struct dp_packet **packets, size_t cnt,
+ struct netdev_flow_key *keys,
+ struct packet_batch batches[], size_t *n_batches)
+{
+#if !defined(__CHECKER__) && !defined(_WIN32)
+ const size_t PKT_ARRAY_SIZE = cnt;
+#else
+ /* Sparse or MSVC doesn't like variable length array. */
+ enum { PKT_ARRAY_SIZE = NETDEV_MAX_BURST };
+#endif
+ struct dpcls_rule *rules[PKT_ARRAY_SIZE];
+ struct dp_netdev *dp = pmd->dp;
+ struct emc_cache *flow_cache = &pmd->flow_cache;
+ int miss_cnt = 0, lost_cnt = 0;
+ bool any_miss;
+ size_t i;
- n_batches = 0;
for (i = 0; i < cnt; i++) {
- struct dp_netdev_flow *flow;
- struct packet_batch *batch;
- size_t j;
+ /* Key length is needed in all the cases, hash computed on demand. */
+ keys[i].len = netdev_flow_key_size(count_1bits(keys[i].mf.map));
+ }
+ any_miss = !dpcls_lookup(&pmd->cls, keys, rules, cnt);
+ if (OVS_UNLIKELY(any_miss) && !fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
+ uint64_t actions_stub[512 / 8], slow_stub[512 / 8];
+ struct ofpbuf actions, put_actions;
+ ovs_u128 ufid;
- if (OVS_UNLIKELY(!mfs[i])) {
- continue;
- }
+ ofpbuf_use_stub(&actions, actions_stub, sizeof actions_stub);
+ ofpbuf_use_stub(&put_actions, slow_stub, sizeof slow_stub);
- if (OVS_UNLIKELY(!rules[i])) {
- struct ofpbuf *buf = &packets[i]->ofpbuf;
+ for (i = 0; i < cnt; i++) {
+ struct dp_netdev_flow *netdev_flow;
+ struct ofpbuf *add_actions;
+ struct match match;
+ int error;
- dp_netdev_count_packet(dp, DP_STAT_MISS, 1);
- dp_netdev_queue_userspace_packet(&q, buf, DPIF_UC_MISS,
- mfs[i], NULL);
- dpif_packet_delete(packets[i]);
- continue;
- }
+ if (OVS_LIKELY(rules[i])) {
+ continue;
+ }
- /* XXX: This O(n^2) algortihm makes sense if we're operating under the
- * assumption that the number of distinct flows (and therefore the
- * number of distinct batches) is quite small. If this turns out not
- * to be the case, it may make sense to pre sort based on the
- * netdev_flow pointer. That done we can get the appropriate batching
- * in O(n * log(n)) instead. */
- batch = NULL;
- flow = dp_netdev_flow_cast(rules[i]);
- for (j = 0; j < n_batches; j++) {
- if (batches[j].flow == flow) {
- batch = &batches[j];
- break;
+ /* It's possible that an earlier slow path execution installed
+ * a rule covering this flow. In this case, it's a lot cheaper
+ * to catch it here than execute a miss. */
+ netdev_flow = dp_netdev_pmd_lookup_flow(pmd, &keys[i]);
+ if (netdev_flow) {
+ rules[i] = &netdev_flow->cr;
+ continue;
+ }
+
+ miss_cnt++;
+
+ miniflow_expand(&keys[i].mf, &match.flow);
+
+ ofpbuf_clear(&actions);
+ ofpbuf_clear(&put_actions);
+
+ dpif_flow_hash(dp->dpif, &match.flow, sizeof match.flow, &ufid);
+ error = dp_netdev_upcall(pmd, packets[i], &match.flow, &match.wc,
+ &ufid, DPIF_UC_MISS, NULL, &actions,
+ &put_actions);
+ if (OVS_UNLIKELY(error && error != ENOSPC)) {
+ dp_packet_delete(packets[i]);
+ lost_cnt++;
+ continue;
+ }
+
+ /* We can't allow the packet batching in the next loop to execute
+ * the actions. Otherwise, if there are any slow path actions,
+ * we'll send the packet up twice. */
+ dp_netdev_execute_actions(pmd, &packets[i], 1, true,
+ actions.data, actions.size);
+
+ add_actions = put_actions.size ? &put_actions : &actions;
+ if (OVS_LIKELY(error != ENOSPC)) {
+ /* XXX: There's a race window where a flow covering this packet
+ * could have already been installed since we last did the flow
+ * lookup before upcall. This could be solved by moving the
+ * mutex lock outside the loop, but that's an awful long time
+ * to be locking everyone out of making flow installs. If we
+ * move to a per-core classifier, it would be reasonable. */
+ ovs_mutex_lock(&pmd->flow_mutex);
+ netdev_flow = dp_netdev_pmd_lookup_flow(pmd, &keys[i]);
+ if (OVS_LIKELY(!netdev_flow)) {
+ netdev_flow = dp_netdev_flow_add(pmd, &match, &ufid,
+ add_actions->data,
+ add_actions->size);
+ }
+ ovs_mutex_unlock(&pmd->flow_mutex);
+
+ emc_insert(flow_cache, &keys[i], netdev_flow);
}
}
- if (!batch) {
- batch = &batches[n_batches++];
- packet_batch_init(batch, flow, md);
+ ofpbuf_uninit(&actions);
+ ofpbuf_uninit(&put_actions);
+ fat_rwlock_unlock(&dp->upcall_rwlock);
+ dp_netdev_count_packet(pmd, DP_STAT_LOST, lost_cnt);
+ } else if (OVS_UNLIKELY(any_miss)) {
+ for (i = 0; i < cnt; i++) {
+ if (OVS_UNLIKELY(!rules[i])) {
+ dp_packet_delete(packets[i]);
+ lost_cnt++;
+ miss_cnt++;
+ }
}
- packet_batch_update(batch, packets[i], mfs[i]);
}
- for (i = 0; i < n_batches; i++) {
- packet_batch_execute(&batches[i], dp);
- }
+ for (i = 0; i < cnt; i++) {
+ struct dp_packet *packet = packets[i];
+ struct dp_netdev_flow *flow;
+
+ if (OVS_UNLIKELY(!rules[i])) {
+ continue;
+ }
+
+ flow = dp_netdev_flow_cast(rules[i]);
- if (q.packet_count) {
- dp_netdev_execute_userspace_queue(&q, dp);
+ emc_insert(flow_cache, &keys[i], flow);
+ dp_netdev_queue_batches(packet, flow, &keys[i].mf, batches, n_batches);
}
+
+ dp_netdev_count_packet(pmd, DP_STAT_MASKED_HIT, cnt - miss_cnt);
+ dp_netdev_count_packet(pmd, DP_STAT_MISS, miss_cnt);
+ dp_netdev_count_packet(pmd, DP_STAT_LOST, lost_cnt);
}
static void
-dp_netdev_port_input(struct dp_netdev *dp, struct dpif_packet **packets,
- int cnt, odp_port_t port_no)
-{
- uint32_t *recirc_depth = recirc_depth_get();
- struct pkt_metadata md = PKT_METADATA_INITIALIZER(port_no);
+dp_netdev_input(struct dp_netdev_pmd_thread *pmd,
+ struct dp_packet **packets, int cnt)
+{
+#if !defined(__CHECKER__) && !defined(_WIN32)
+ const size_t PKT_ARRAY_SIZE = cnt;
+#else
+ /* Sparse or MSVC doesn't like variable length array. */
+ enum { PKT_ARRAY_SIZE = NETDEV_MAX_BURST };
+#endif
+ struct netdev_flow_key keys[PKT_ARRAY_SIZE];
+ struct packet_batch batches[PKT_ARRAY_SIZE];
+ long long now = time_msec();
+ size_t newcnt, n_batches, i;
- *recirc_depth = 0;
- dp_netdev_input(dp, packets, cnt, &md);
-}
+ n_batches = 0;
+ newcnt = emc_processing(pmd, packets, cnt, keys, batches, &n_batches);
+ if (OVS_UNLIKELY(newcnt)) {
+ fast_path_processing(pmd, packets, newcnt, keys, batches, &n_batches);
+ }
-static int
-dp_netdev_queue_userspace_packet(struct dp_netdev_queue *q,
- struct ofpbuf *packet, int type,
- const struct miniflow *key,
- const struct nlattr *userdata)
-{
- if (q->packet_count < NETDEV_MAX_RX_BATCH) {
- int cnt = q->packet_count;
- struct dpif_upcall *upcall = &q->upcalls[cnt];
- struct ofpbuf *buf = &q->bufs[cnt];
- size_t buf_size;
- struct flow flow;
- void *data;
-
- upcall->type = type;
-
- /* Allocate buffer big enough for everything. */
- buf_size = ODPUTIL_FLOW_KEY_BYTES;
- if (userdata) {
- buf_size += NLA_ALIGN(userdata->nla_len);
- }
- buf_size += ofpbuf_size(packet);
- ofpbuf_init(buf, buf_size);
-
- /* Put ODP flow. */
- miniflow_expand(key, &flow);
- odp_flow_key_from_flow(buf, &flow, NULL, flow.in_port.odp_port, true);
- upcall->key = ofpbuf_data(buf);
- upcall->key_len = ofpbuf_size(buf);
-
- /* Put userdata. */
- if (userdata) {
- upcall->userdata = ofpbuf_put(buf, userdata,
- NLA_ALIGN(userdata->nla_len));
- }
-
- /* We have to perform a copy of the packet, because we cannot send DPDK
- * mbufs to a non pmd thread. When the upcall processing will be done
- * in the pmd thread, this copy can be avoided */
- data = ofpbuf_put(buf, ofpbuf_data(packet), ofpbuf_size(packet));
- ofpbuf_use_stub(&upcall->packet, data, ofpbuf_size(packet));
- ofpbuf_set_size(&upcall->packet, ofpbuf_size(packet));
-
- q->packet_count++;
- return 0;
- } else {
- return ENOBUFS;
+ for (i = 0; i < n_batches; i++) {
+ batches[i].flow->batch = NULL;
+ }
+
+ for (i = 0; i < n_batches; i++) {
+ packet_batch_execute(&batches[i], pmd, now);
}
}
+struct dp_netdev_execute_aux {
+ struct dp_netdev_pmd_thread *pmd;
+};
+
static void
-dp_netdev_execute_userspace_queue(struct dp_netdev_queue *q,
- struct dp_netdev *dp)
+dpif_netdev_register_upcall_cb(struct dpif *dpif, upcall_callback *cb,
+ void *aux)
{
- struct dpif_upcall *upcalls = q->upcalls;
- struct ofpbuf *bufs = q->bufs;
- int cnt = q->packet_count;
+ struct dp_netdev *dp = get_dp_netdev(dpif);
+ dp->upcall_aux = aux;
+ dp->upcall_cb = cb;
+}
- if (!fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
- ovs_assert(dp->upcall_cb);
- dp->upcall_cb(dp->dpif, upcalls, bufs, cnt);
- fat_rwlock_unlock(&dp->upcall_rwlock);
- } else {
+static void
+dp_netdev_drop_packets(struct dp_packet **packets, int cnt, bool may_steal)
+{
+ if (may_steal) {
int i;
for (i = 0; i < cnt; i++) {
- ofpbuf_uninit(&bufs[i]);
- ofpbuf_uninit(&upcalls[i].packet);
+ dp_packet_delete(packets[i]);
}
}
}
-struct dp_netdev_execute_aux {
- struct dp_netdev *dp;
-};
+static int
+push_tnl_action(const struct dp_netdev *dp,
+ const struct nlattr *attr,
+ struct dp_packet **packets, int cnt)
+{
+ struct dp_netdev_port *tun_port;
+ const struct ovs_action_push_tnl *data;
+
+ data = nl_attr_get(attr);
+
+ tun_port = dp_netdev_lookup_port(dp, u32_to_odp(data->tnl_port));
+ if (!tun_port) {
+ return -EINVAL;
+ }
+ netdev_push_header(tun_port->netdev, packets, cnt, data);
+
+ return 0;
+}
static void
-dpif_netdev_register_upcall_cb(struct dpif *dpif, exec_upcall_cb *cb)
+dp_netdev_clone_pkt_batch(struct dp_packet **dst_pkts,
+ struct dp_packet **src_pkts, int cnt)
{
- struct dp_netdev *dp = get_dp_netdev(dpif);
- dp->upcall_cb = cb;
+ int i;
+
+ for (i = 0; i < cnt; i++) {
+ dst_pkts[i] = dp_packet_clone(src_pkts[i]);
+ }
}
static void
-dp_execute_cb(void *aux_, struct dpif_packet **packets, int cnt,
- struct pkt_metadata *md,
+dp_execute_cb(void *aux_, struct dp_packet **packets, int cnt,
const struct nlattr *a, bool may_steal)
OVS_NO_THREAD_SAFETY_ANALYSIS
{
struct dp_netdev_execute_aux *aux = aux_;
+ uint32_t *depth = recirc_depth_get();
+ struct dp_netdev_pmd_thread *pmd = aux->pmd;
+ struct dp_netdev *dp = pmd->dp;
int type = nl_attr_type(a);
struct dp_netdev_port *p;
- uint32_t *depth = recirc_depth_get();
int i;
switch ((enum ovs_action_attr)type) {
case OVS_ACTION_ATTR_OUTPUT:
- p = dp_netdev_lookup_port(aux->dp, u32_to_odp(nl_attr_get_u32(a)));
+ p = dp_netdev_lookup_port(dp, u32_to_odp(nl_attr_get_u32(a)));
if (OVS_LIKELY(p)) {
- netdev_send(p->netdev, packets, cnt, may_steal);
- } else if (may_steal) {
- for (i = 0; i < cnt; i++) {
- dpif_packet_delete(packets[i]);
- }
+ netdev_send(p->netdev, pmd->tx_qid, packets, cnt, may_steal);
+ return;
}
break;
- case OVS_ACTION_ATTR_USERSPACE: {
- const struct nlattr *userdata;
- struct netdev_flow_key key;
- struct dp_netdev_queue q = DP_NETDEV_QUEUE_INITIALIZER;
-
- userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
-
- miniflow_initialize(&key.flow, key.buf);
-
- for (i = 0; i < cnt; i++) {
- struct ofpbuf *packet;
-
- packet = &packets[i]->ofpbuf;
-
- miniflow_extract(packet, md, &key.flow);
+ case OVS_ACTION_ATTR_TUNNEL_PUSH:
+ if (*depth < MAX_RECIRC_DEPTH) {
+ struct dp_packet *tnl_pkt[NETDEV_MAX_BURST];
+ int err;
- dp_netdev_queue_userspace_packet(&q, packet,
- DPIF_UC_ACTION, &key.flow,
- userdata);
- if (may_steal) {
- dpif_packet_delete(packets[i]);
+ if (!may_steal) {
+ dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
+ packets = tnl_pkt;
}
- }
- if (q.packet_count) {
- dp_netdev_execute_userspace_queue(&q, aux->dp);
+ err = push_tnl_action(dp, a, packets, cnt);
+ if (!err) {
+ (*depth)++;
+ dp_netdev_input(pmd, packets, cnt);
+ (*depth)--;
+ } else {
+ dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
+ }
+ return;
}
break;
- }
- case OVS_ACTION_ATTR_HASH: {
- const struct ovs_action_hash *hash_act;
- struct netdev_flow_key key;
- uint32_t hash;
+ case OVS_ACTION_ATTR_TUNNEL_POP:
+ if (*depth < MAX_RECIRC_DEPTH) {
+ odp_port_t portno = u32_to_odp(nl_attr_get_u32(a));
- hash_act = nl_attr_get(a);
+ p = dp_netdev_lookup_port(dp, portno);
+ if (p) {
+ struct dp_packet *tnl_pkt[NETDEV_MAX_BURST];
+ int err;
- miniflow_initialize(&key.flow, key.buf);
+ if (!may_steal) {
+ dp_netdev_clone_pkt_batch(tnl_pkt, packets, cnt);
+ packets = tnl_pkt;
+ }
- for (i = 0; i < cnt; i++) {
+ err = netdev_pop_header(p->netdev, packets, cnt);
+ if (!err) {
- /* XXX: this is slow. Use RSS hash in the future */
- miniflow_extract(&packets[i]->ofpbuf, md, &key.flow);
+ for (i = 0; i < cnt; i++) {
+ packets[i]->md.in_port.odp_port = portno;
+ }
- if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
- /* Hash need not be symmetric, nor does it need to include
- * L2 fields. */
- hash = miniflow_hash_5tuple(&key.flow, hash_act->hash_basis);
- } else {
- VLOG_WARN("Unknown hash algorithm specified "
- "for the hash action.");
- hash = 2;
+ (*depth)++;
+ dp_netdev_input(pmd, packets, cnt);
+ (*depth)--;
+ } else {
+ dp_netdev_drop_packets(tnl_pkt, cnt, !may_steal);
+ }
+ return;
}
+ }
+ break;
- if (!hash) {
- hash = 1; /* 0 is not valid */
- }
+ case OVS_ACTION_ATTR_USERSPACE:
+ if (!fat_rwlock_tryrdlock(&dp->upcall_rwlock)) {
+ const struct nlattr *userdata;
+ struct ofpbuf actions;
+ struct flow flow;
+ ovs_u128 ufid;
+
+ userdata = nl_attr_find_nested(a, OVS_USERSPACE_ATTR_USERDATA);
+ ofpbuf_init(&actions, 0);
- if (i == 0) {
- md->dp_hash = hash;
+ for (i = 0; i < cnt; i++) {
+ int error;
+
+ ofpbuf_clear(&actions);
+
+ flow_extract(packets[i], &flow);
+ dpif_flow_hash(dp->dpif, &flow, sizeof flow, &ufid);
+ error = dp_netdev_upcall(pmd, packets[i], &flow, NULL, &ufid,
+ DPIF_UC_ACTION, userdata,&actions,
+ NULL);
+ if (!error || error == ENOSPC) {
+ dp_netdev_execute_actions(pmd, &packets[i], 1, may_steal,
+ actions.data, actions.size);
+ } else if (may_steal) {
+ dp_packet_delete(packets[i]);
+ }
}
- packets[i]->dp_hash = hash;
+ ofpbuf_uninit(&actions);
+ fat_rwlock_unlock(&dp->upcall_rwlock);
+
+ return;
}
break;
- }
case OVS_ACTION_ATTR_RECIRC:
if (*depth < MAX_RECIRC_DEPTH) {
+ struct dp_packet *recirc_pkts[NETDEV_MAX_BURST];
- (*depth)++;
- for (i = 0; i < cnt; i++) {
- struct dpif_packet *recirc_pkt;
- struct pkt_metadata recirc_md = *md;
-
- recirc_pkt = (may_steal) ? packets[i]
- : dpif_packet_clone(packets[i]);
-
- recirc_md.recirc_id = nl_attr_get_u32(a);
-
- /* Hash is private to each packet */
- recirc_md.dp_hash = packets[i]->dp_hash;
+ if (!may_steal) {
+ dp_netdev_clone_pkt_batch(recirc_pkts, packets, cnt);
+ packets = recirc_pkts;
+ }
- dp_netdev_input(aux->dp, &recirc_pkt, 1, &recirc_md);
+ for (i = 0; i < cnt; i++) {
+ packets[i]->md.recirc_id = nl_attr_get_u32(a);
}
+
+ (*depth)++;
+ dp_netdev_input(pmd, packets, cnt);
(*depth)--;
- break;
- } else {
- VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
- if (may_steal) {
- for (i = 0; i < cnt; i++) {
- dpif_packet_delete(packets[i]);
- }
- }
+ return;
}
+
+ VLOG_WARN("Packet dropped. Max recirculation depth exceeded.");
break;
case OVS_ACTION_ATTR_PUSH_VLAN:
case OVS_ACTION_ATTR_PUSH_MPLS:
case OVS_ACTION_ATTR_POP_MPLS:
case OVS_ACTION_ATTR_SET:
+ case OVS_ACTION_ATTR_SET_MASKED:
case OVS_ACTION_ATTR_SAMPLE:
+ case OVS_ACTION_ATTR_HASH:
case OVS_ACTION_ATTR_UNSPEC:
case __OVS_ACTION_ATTR_MAX:
OVS_NOT_REACHED();
}
+
+ dp_netdev_drop_packets(packets, cnt, may_steal);
}
static void
-dp_netdev_execute_actions(struct dp_netdev *dp,
- struct dpif_packet **packets, int cnt,
- bool may_steal, struct pkt_metadata *md,
+dp_netdev_execute_actions(struct dp_netdev_pmd_thread *pmd,
+ struct dp_packet **packets, int cnt,
+ bool may_steal,
const struct nlattr *actions, size_t actions_len)
{
- struct dp_netdev_execute_aux aux = {dp};
+ struct dp_netdev_execute_aux aux = { pmd };
- odp_execute_actions(&aux, packets, cnt, may_steal, md, actions,
+ odp_execute_actions(&aux, packets, cnt, may_steal, actions,
actions_len, dp_execute_cb);
}
const struct dpif_class dpif_netdev_class = {
"netdev",
+ dpif_netdev_init,
dpif_netdev_enumerate,
dpif_netdev_port_open_type,
dpif_netdev_open,
dpif_netdev_port_dump_done,
dpif_netdev_port_poll,
dpif_netdev_port_poll_wait,
- dpif_netdev_flow_get,
- dpif_netdev_flow_put,
- dpif_netdev_flow_del,
dpif_netdev_flow_flush,
dpif_netdev_flow_dump_create,
dpif_netdev_flow_dump_destroy,
dpif_netdev_flow_dump_thread_create,
dpif_netdev_flow_dump_thread_destroy,
dpif_netdev_flow_dump_next,
- dpif_netdev_execute,
- NULL, /* operate */
+ dpif_netdev_operate,
NULL, /* recv_set */
NULL, /* handlers_set */
+ dpif_netdev_pmd_set,
dpif_netdev_queue_to_priority,
NULL, /* recv */
NULL, /* recv_wait */
dpif_netdev_register_upcall_cb,
dpif_netdev_enable_upcall,
dpif_netdev_disable_upcall,
+ dpif_netdev_get_datapath_version,
};
static void
dp_register_provider(class);
}
+static void
+dpif_dummy_override(const char *type)
+{
+ if (!dp_unregister_provider(type)) {
+ dpif_dummy_register__(type);
+ }
+}
+
void
-dpif_dummy_register(bool override)
+dpif_dummy_register(enum dummy_level level)
{
- if (override) {
+ if (level == DUMMY_OVERRIDE_ALL) {
struct sset types;
const char *type;
sset_init(&types);
dp_enumerate_types(&types);
SSET_FOR_EACH (type, &types) {
- if (!dp_unregister_provider(type)) {
- dpif_dummy_register__(type);
- }
+ dpif_dummy_override(type);
}
sset_destroy(&types);
+ } else if (level == DUMMY_OVERRIDE_SYSTEM) {
+ dpif_dummy_override("system");
}
dpif_dummy_register__("dummy");
unixctl_command_register("dpif-dummy/change-port-number",
- "DP PORT NEW-NUMBER",
+ "dp port new-number",
3, 3, dpif_dummy_change_port_number, NULL);
- unixctl_command_register("dpif-dummy/delete-port", "DP PORT",
+ unixctl_command_register("dpif-dummy/delete-port", "dp port",
2, 2, dpif_dummy_delete_port, NULL);
}
+\f
+/* Datapath Classifier. */
+
+/* A set of rules that all have the same fields wildcarded. */
+struct dpcls_subtable {
+ /* The fields are only used by writers. */
+ struct cmap_node cmap_node OVS_GUARDED; /* Within dpcls 'subtables_map'. */
+
+ /* These fields are accessed by readers. */
+ struct cmap rules; /* Contains "struct dpcls_rule"s. */
+ struct netdev_flow_key mask; /* Wildcards for fields (const). */
+ /* 'mask' must be the last field, additional space is allocated here. */
+};
+
+/* Initializes 'cls' as a classifier that initially contains no classification
+ * rules. */
+static void
+dpcls_init(struct dpcls *cls)
+{
+ cmap_init(&cls->subtables_map);
+ pvector_init(&cls->subtables);
+}
+
+static void
+dpcls_destroy_subtable(struct dpcls *cls, struct dpcls_subtable *subtable)
+{
+ pvector_remove(&cls->subtables, subtable);
+ cmap_remove(&cls->subtables_map, &subtable->cmap_node,
+ subtable->mask.hash);
+ cmap_destroy(&subtable->rules);
+ ovsrcu_postpone(free, subtable);
+}
+
+/* Destroys 'cls'. Rules within 'cls', if any, are not freed; this is the
+ * caller's responsibility.
+ * May only be called after all the readers have been terminated. */
+static void
+dpcls_destroy(struct dpcls *cls)
+{
+ if (cls) {
+ struct dpcls_subtable *subtable;
+
+ CMAP_FOR_EACH (subtable, cmap_node, &cls->subtables_map) {
+ dpcls_destroy_subtable(cls, subtable);
+ }
+ cmap_destroy(&cls->subtables_map);
+ pvector_destroy(&cls->subtables);
+ }
+}
+
+static struct dpcls_subtable *
+dpcls_create_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
+{
+ struct dpcls_subtable *subtable;
+
+ /* Need to add one. */
+ subtable = xmalloc(sizeof *subtable
+ - sizeof subtable->mask.mf + mask->len);
+ cmap_init(&subtable->rules);
+ netdev_flow_key_clone(&subtable->mask, mask);
+ cmap_insert(&cls->subtables_map, &subtable->cmap_node, mask->hash);
+ pvector_insert(&cls->subtables, subtable, 0);
+ pvector_publish(&cls->subtables);
+
+ return subtable;
+}
+
+static inline struct dpcls_subtable *
+dpcls_find_subtable(struct dpcls *cls, const struct netdev_flow_key *mask)
+{
+ struct dpcls_subtable *subtable;
+
+ CMAP_FOR_EACH_WITH_HASH (subtable, cmap_node, mask->hash,
+ &cls->subtables_map) {
+ if (netdev_flow_key_equal(&subtable->mask, mask)) {
+ return subtable;
+ }
+ }
+ return dpcls_create_subtable(cls, mask);
+}
+
+/* Insert 'rule' into 'cls'. */
+static void
+dpcls_insert(struct dpcls *cls, struct dpcls_rule *rule,
+ const struct netdev_flow_key *mask)
+{
+ struct dpcls_subtable *subtable = dpcls_find_subtable(cls, mask);
+
+ rule->mask = &subtable->mask;
+ cmap_insert(&subtable->rules, &rule->cmap_node, rule->flow.hash);
+}
+
+/* Removes 'rule' from 'cls', also destructing the 'rule'. */
+static void
+dpcls_remove(struct dpcls *cls, struct dpcls_rule *rule)
+{
+ struct dpcls_subtable *subtable;
+
+ ovs_assert(rule->mask);
+
+ INIT_CONTAINER(subtable, rule->mask, mask);
+
+ if (cmap_remove(&subtable->rules, &rule->cmap_node, rule->flow.hash)
+ == 0) {
+ dpcls_destroy_subtable(cls, subtable);
+ pvector_publish(&cls->subtables);
+ }
+}
+
+/* Returns true if 'target' satisifies 'key' in 'mask', that is, if each 1-bit
+ * in 'mask' the values in 'key' and 'target' are the same.
+ *
+ * Note: 'key' and 'mask' have the same mask, and 'key' is already masked. */
+static inline bool
+dpcls_rule_matches_key(const struct dpcls_rule *rule,
+ const struct netdev_flow_key *target)
+{
+ const uint64_t *keyp = rule->flow.mf.inline_values;
+ const uint64_t *maskp = rule->mask->mf.inline_values;
+ uint64_t target_u64;
+
+ NETDEV_FLOW_KEY_FOR_EACH_IN_MAP(target_u64, target, rule->flow.mf.map) {
+ if (OVS_UNLIKELY((target_u64 & *maskp++) != *keyp++)) {
+ return false;
+ }
+ }
+ return true;
+}
+
+/* For each miniflow in 'flows' performs a classifier lookup writing the result
+ * into the corresponding slot in 'rules'. If a particular entry in 'flows' is
+ * NULL it is skipped.
+ *
+ * This function is optimized for use in the userspace datapath and therefore
+ * does not implement a lot of features available in the standard
+ * classifier_lookup() function. Specifically, it does not implement
+ * priorities, instead returning any rule which matches the flow.
+ *
+ * Returns true if all flows found a corresponding rule. */
+static bool
+dpcls_lookup(const struct dpcls *cls, const struct netdev_flow_key keys[],
+ struct dpcls_rule **rules, const size_t cnt)
+{
+ /* The batch size 16 was experimentally found faster than 8 or 32. */
+ typedef uint16_t map_type;
+#define MAP_BITS (sizeof(map_type) * CHAR_BIT)
+
+#if !defined(__CHECKER__) && !defined(_WIN32)
+ const int N_MAPS = DIV_ROUND_UP(cnt, MAP_BITS);
+#else
+ enum { N_MAPS = DIV_ROUND_UP(NETDEV_MAX_BURST, MAP_BITS) };
+#endif
+ map_type maps[N_MAPS];
+ struct dpcls_subtable *subtable;
+
+ memset(maps, 0xff, sizeof maps);
+ if (cnt % MAP_BITS) {
+ maps[N_MAPS - 1] >>= MAP_BITS - cnt % MAP_BITS; /* Clear extra bits. */
+ }
+ memset(rules, 0, cnt * sizeof *rules);
+
+ PVECTOR_FOR_EACH (subtable, &cls->subtables) {
+ const struct netdev_flow_key *mkeys = keys;
+ struct dpcls_rule **mrules = rules;
+ map_type remains = 0;
+ int m;
+
+ BUILD_ASSERT_DECL(sizeof remains == sizeof *maps);
+
+ for (m = 0; m < N_MAPS; m++, mkeys += MAP_BITS, mrules += MAP_BITS) {
+ uint32_t hashes[MAP_BITS];
+ const struct cmap_node *nodes[MAP_BITS];
+ unsigned long map = maps[m];
+ int i;
+
+ if (!map) {
+ continue; /* Skip empty maps. */
+ }
+
+ /* Compute hashes for the remaining keys. */
+ ULLONG_FOR_EACH_1(i, map) {
+ hashes[i] = netdev_flow_key_hash_in_mask(&mkeys[i],
+ &subtable->mask);
+ }
+ /* Lookup. */
+ map = cmap_find_batch(&subtable->rules, map, hashes, nodes);
+ /* Check results. */
+ ULLONG_FOR_EACH_1(i, map) {
+ struct dpcls_rule *rule;
+
+ CMAP_NODE_FOR_EACH (rule, cmap_node, nodes[i]) {
+ if (OVS_LIKELY(dpcls_rule_matches_key(rule, &mkeys[i]))) {
+ mrules[i] = rule;
+ goto next;
+ }
+ }
+ ULLONG_SET0(map, i); /* Did not match. */
+ next:
+ ; /* Keep Sparse happy. */
+ }
+ maps[m] &= ~map; /* Clear the found rules. */
+ remains |= maps[m];
+ }
+ if (!remains) {
+ return true; /* All found. */
+ }
+ }
+ return false; /* Some misses. */
+}
projects / cascardo / ovs.git / blobdiff