#include <vnet/session/application_local.h>
#include <vnet/session/session.h>
-ct_connection_t *connections;
+typedef enum ct_segment_flags_
+{
+ CT_SEGMENT_F_CLIENT_DETACHED = 1 << 0,
+ CT_SEGMENT_F_SERVER_DETACHED = 1 << 1,
+} ct_segment_flags_t;
+
+typedef struct ct_segment_
+{
+ u32 segment_index;
+ u32 client_n_sessions;
+ u32 server_n_sessions;
+ ct_segment_flags_t flags;
+} ct_segment_t;
+
+typedef struct ct_segments_
+{
+ u32 sm_index;
+ u32 server_wrk;
+ u32 client_wrk;
+ ct_segment_t *segments;
+} ct_segments_ctx_t;
-ct_connection_t *
-ct_connection_alloc (void)
+typedef struct ct_main_
+{
+ ct_connection_t **connections; /**< Per-worker connection pools */
+ u32 n_workers; /**< Number of vpp workers */
+ u32 n_sessions; /**< Cumulative sessions counter */
+ u32 *ho_reusable; /**< Vector of reusable ho indices */
+ clib_spinlock_t ho_reuseable_lock; /**< Lock for reusable ho indices */
+ clib_rwlock_t app_segs_lock; /**< RW lock for seg contexts */
+ uword *app_segs_ctxs_table; /**< App handle to segment pool map */
+ ct_segments_ctx_t *app_seg_ctxs; /**< Pool of ct segment contexts */
+} ct_main_t;
+
+static ct_main_t ct_main;
+
+static ct_connection_t *
+ct_connection_alloc (u32 thread_index)
{
ct_connection_t *ct;
- pool_get_zero (connections, ct);
- ct->c_c_index = ct - connections;
- ct->c_thread_index = 0;
+ pool_get_zero (ct_main.connections[thread_index], ct);
+ ct->c_c_index = ct - ct_main.connections[thread_index];
+ ct->c_thread_index = thread_index;
ct->client_wrk = ~0;
ct->server_wrk = ~0;
+ ct->seg_ctx_index = ~0;
+ ct->ct_seg_index = ~0;
return ct;
}
-ct_connection_t *
-ct_connection_get (u32 ct_index)
+static ct_connection_t *
+ct_connection_get (u32 ct_index, u32 thread_index)
{
- if (pool_is_free_index (connections, ct_index))
+ if (pool_is_free_index (ct_main.connections[thread_index], ct_index))
return 0;
- return pool_elt_at_index (connections, ct_index);
+ return pool_elt_at_index (ct_main.connections[thread_index], ct_index);
}
-void
+static void
ct_connection_free (ct_connection_t * ct)
{
if (CLIB_DEBUG)
- memset (ct, 0xfc, sizeof (*ct));
- pool_put (connections, ct);
+ {
+ u32 thread_index = ct->c_thread_index;
+ memset (ct, 0xfc, sizeof (*ct));
+ pool_put (ct_main.connections[thread_index], ct);
+ return;
+ }
+ pool_put (ct_main.connections[ct->c_thread_index], ct);
+}
+
+static ct_connection_t *
+ct_half_open_alloc (void)
+{
+ ct_main_t *cm = &ct_main;
+ u32 *hip;
+
+ clib_spinlock_lock (&cm->ho_reuseable_lock);
+ vec_foreach (hip, cm->ho_reusable)
+ pool_put_index (cm->connections[0], *hip);
+ vec_reset_length (cm->ho_reusable);
+ clib_spinlock_unlock (&cm->ho_reuseable_lock);
+
+ return ct_connection_alloc (0);
+}
+
+void
+ct_half_open_add_reusable (u32 ho_index)
+{
+ ct_main_t *cm = &ct_main;
+
+ clib_spinlock_lock (&cm->ho_reuseable_lock);
+ vec_add1 (cm->ho_reusable, ho_index);
+ clib_spinlock_unlock (&cm->ho_reuseable_lock);
}
session_t *
ct_session_get_peer (session_t * s)
{
ct_connection_t *ct, *peer_ct;
- ct = ct_connection_get (s->connection_index);
- peer_ct = ct_connection_get (ct->peer_index);
- return session_get (peer_ct->c_s_index, 0);
+ ct = ct_connection_get (s->connection_index, s->thread_index);
+ peer_ct = ct_connection_get (ct->peer_index, s->thread_index);
+ return session_get (peer_ct->c_s_index, s->thread_index);
}
void
sep->transport_proto = ct->actual_tp;
sep->port = ct->c_lcl_port;
sep->is_ip4 = ct->c_is_ip4;
+ ip_copy (&sep->ip, &ct->c_lcl_ip, ct->c_is_ip4);
+}
+
+static void
+ct_session_dealloc_fifos (ct_connection_t *ct, svm_fifo_t *rx_fifo,
+ svm_fifo_t *tx_fifo)
+{
+ ct_segments_ctx_t *seg_ctx;
+ ct_main_t *cm = &ct_main;
+ ct_segment_flags_t flags;
+ segment_manager_t *sm;
+ app_worker_t *app_wrk;
+ ct_segment_t *ct_seg;
+ fifo_segment_t *fs;
+ u32 seg_index;
+ u8 cnt;
+
+ /*
+ * Cleanup fifos
+ */
+
+ sm = segment_manager_get (rx_fifo->segment_manager);
+ seg_index = rx_fifo->segment_index;
+
+ fs = segment_manager_get_segment_w_lock (sm, seg_index);
+ fifo_segment_free_fifo (fs, rx_fifo);
+ fifo_segment_free_fifo (fs, tx_fifo);
+ segment_manager_segment_reader_unlock (sm);
+
+ /*
+ * Update segment context
+ */
+
+ clib_rwlock_reader_lock (&cm->app_segs_lock);
+
+ seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, ct->seg_ctx_index);
+ ct_seg = pool_elt_at_index (seg_ctx->segments, ct->ct_seg_index);
+
+ if (ct->flags & CT_CONN_F_CLIENT)
+ {
+ cnt =
+ __atomic_sub_fetch (&ct_seg->client_n_sessions, 1, __ATOMIC_RELAXED);
+ if (!cnt)
+ ct_seg->flags |= CT_SEGMENT_F_CLIENT_DETACHED;
+ }
+ else
+ {
+ cnt =
+ __atomic_sub_fetch (&ct_seg->server_n_sessions, 1, __ATOMIC_RELAXED);
+ if (!cnt)
+ ct_seg->flags |= CT_SEGMENT_F_SERVER_DETACHED;
+ }
+
+ flags = ct_seg->flags;
+
+ clib_rwlock_reader_unlock (&cm->app_segs_lock);
+
+ /*
+ * No need to do any app updates, return
+ */
+ if (cnt)
+ return;
+
+ if (ct->flags & CT_CONN_F_CLIENT)
+ {
+ app_wrk = app_worker_get_if_valid (ct->client_wrk);
+ /* Determine if client app still needs notification, i.e., if it is
+ * still attached. If client detached and this is the last ct session
+ * on this segment, then its connects segment manager should also be
+ * detached, so do not send notification */
+ if (app_wrk)
+ {
+ segment_manager_t *csm;
+ csm = app_worker_get_connect_segment_manager (app_wrk);
+ if (!segment_manager_app_detached (csm))
+ app_worker_del_segment_notify (app_wrk, ct->segment_handle);
+ }
+ }
+ else if (!segment_manager_app_detached (sm))
+ {
+ app_wrk = app_worker_get (ct->server_wrk);
+ app_worker_del_segment_notify (app_wrk, ct->segment_handle);
+ }
+
+ if (!(flags & CT_SEGMENT_F_CLIENT_DETACHED) ||
+ !(flags & CT_SEGMENT_F_SERVER_DETACHED))
+ return;
+
+ /*
+ * Remove segment context because both client and server detached
+ */
+
+ clib_rwlock_writer_lock (&cm->app_segs_lock);
+
+ seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, ct->seg_ctx_index);
+ pool_put_index (seg_ctx->segments, ct->ct_seg_index);
+
+ /*
+ * No more segment indices left, remove the segments context
+ */
+ if (!pool_elts (seg_ctx->segments))
+ {
+ u64 table_handle = seg_ctx->client_wrk << 16 | seg_ctx->server_wrk;
+ table_handle = (u64) seg_ctx->sm_index << 32 | table_handle;
+ hash_unset (cm->app_segs_ctxs_table, table_handle);
+ pool_free (seg_ctx->segments);
+ pool_put_index (cm->app_seg_ctxs, ct->seg_ctx_index);
+ }
+
+ clib_rwlock_writer_unlock (&cm->app_segs_lock);
+
+ segment_manager_lock_and_del_segment (sm, seg_index);
+
+ /* Cleanup segment manager if needed. If server detaches there's a chance
+ * the client's sessions will hold up segment removal */
+ if (segment_manager_app_detached (sm) && !segment_manager_has_fifos (sm))
+ segment_manager_free_safe (sm);
}
int
-ct_session_connect_notify (session_t * ss)
+ct_session_connect_notify (session_t *ss)
{
- svm_fifo_segment_private_t *seg;
+ u32 ss_index, opaque, thread_index, cnt;
ct_connection_t *sct, *cct;
+ ct_segments_ctx_t *seg_ctx;
app_worker_t *client_wrk;
- segment_manager_t *sm;
- u64 segment_handle;
- int is_fail = 0;
+ ct_main_t *cm = &ct_main;
+ ct_segment_t *ct_seg;
session_t *cs;
- u32 ss_index;
+ int err = 0;
ss_index = ss->session_index;
+ thread_index = ss->thread_index;
sct = (ct_connection_t *) session_get_transport (ss);
client_wrk = app_worker_get (sct->client_wrk);
+ opaque = sct->client_opaque;
- sm = segment_manager_get (ss->rx_fifo->segment_manager);
- seg = segment_manager_get_segment_w_lock (sm, ss->rx_fifo->segment_index);
- segment_handle = segment_manager_segment_handle (sm, seg);
+ cct = ct_connection_get (sct->peer_index, thread_index);
- if (app_worker_add_segment_notify (client_wrk, segment_handle))
+ /* Client closed while waiting for reply from server */
+ if (!cct)
{
- clib_warning ("failed to notify client %u of new segment",
- sct->client_wrk);
- segment_manager_segment_reader_unlock (sm);
- session_close (ss);
- is_fail = 1;
+ session_transport_closing_notify (&sct->connection);
+ session_transport_delete_notify (&sct->connection);
+ ct_connection_free (sct);
+ return 0;
}
- else
+
+ session_half_open_delete_notify (&cct->connection);
+ cct->flags &= ~CT_CONN_F_HALF_OPEN;
+
+ /*
+ * Update ct segment context
+ */
+
+ clib_rwlock_reader_lock (&cm->app_segs_lock);
+
+ seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, sct->seg_ctx_index);
+ ct_seg = pool_elt_at_index (seg_ctx->segments, sct->ct_seg_index);
+
+ cnt = __atomic_add_fetch (&ct_seg->client_n_sessions, 1, __ATOMIC_RELAXED);
+ if (cnt == 1)
{
- segment_manager_segment_reader_unlock (sm);
+ err = app_worker_add_segment_notify (client_wrk, cct->segment_handle);
+ if (err)
+ {
+ clib_rwlock_reader_unlock (&cm->app_segs_lock);
+ session_close (ss);
+ goto error;
+ }
}
- /* Alloc client session */
- cct = ct_connection_get (sct->peer_index);
+ clib_rwlock_reader_unlock (&cm->app_segs_lock);
+
+ /*
+ * Alloc client session
+ */
- cs = session_alloc (0);
- ss = session_get (ss_index, 0);
+ cs = session_alloc (thread_index);
+ ss = session_get (ss_index, thread_index);
cs->session_type = ss->session_type;
- cs->connection_index = sct->c_c_index;
- cs->listener_index = SESSION_INVALID_INDEX;
+ cs->listener_handle = SESSION_INVALID_HANDLE;
cs->session_state = SESSION_STATE_CONNECTING;
cs->app_wrk_index = client_wrk->wrk_index;
cs->connection_index = cct->c_c_index;
+ cct->seg_ctx_index = sct->seg_ctx_index;
+ cct->ct_seg_index = sct->ct_seg_index;
cct->c_s_index = cs->session_index;
+ cct->client_rx_fifo = ss->tx_fifo;
+ cct->client_tx_fifo = ss->rx_fifo;
+
+ cct->client_rx_fifo->refcnt++;
+ cct->client_tx_fifo->refcnt++;
/* This will allocate fifos for the session. They won't be used for
* exchanging data but they will be used to close the connection if
* the segment manager/worker is freed */
- if (app_worker_init_connected (client_wrk, cs))
+ if ((err = app_worker_init_connected (client_wrk, cs)))
{
session_close (ss);
- return -1;
+ session_free (cs);
+ goto error;
}
- if (app_worker_connect_notify (client_wrk, is_fail ? 0 : cs,
- sct->client_opaque))
+ cs->session_state = SESSION_STATE_CONNECTING;
+
+ if (app_worker_connect_notify (client_wrk, cs, err, opaque))
{
session_close (ss);
+ ct_session_dealloc_fifos (cct, cs->rx_fifo, cs->tx_fifo);
+ session_free (cs);
return -1;
}
- cs = session_get (cct->c_s_index, 0);
+ cs = session_get (cct->c_s_index, cct->c_thread_index);
cs->session_state = SESSION_STATE_READY;
return 0;
+
+error:
+ app_worker_connect_notify (client_wrk, 0, err, opaque);
+ return -1;
}
-static void
-ct_session_fix_eventds (svm_msg_q_t * sq, svm_msg_q_t * cq)
+static ct_segment_t *
+ct_lookup_free_segment (segment_manager_t *sm, ct_segments_ctx_t *seg_ctx,
+ u32 pair_bytes)
{
- int fd;
+ uword free_bytes, max_free_bytes;
+ ct_segment_t *ct_seg, *res = 0;
+ fifo_segment_t *fs;
+ u32 max_fifos;
- /*
- * segment manager initializes only the producer eventds, since vpp is
- * typically the producer. But for local sessions, we also pass to the
- * apps the mqs they listen on for events from peer apps, so they are also
- * consumer fds.
- */
- fd = svm_msg_q_get_producer_eventfd (sq);
- svm_msg_q_set_consumer_eventfd (sq, fd);
- fd = svm_msg_q_get_producer_eventfd (cq);
- svm_msg_q_set_consumer_eventfd (cq, fd);
+ max_free_bytes = pair_bytes;
+ pool_foreach (ct_seg, seg_ctx->segments)
+ {
+ /* Client or server has detached so segment cannot be used */
+ if ((ct_seg->flags & CT_SEGMENT_F_SERVER_DETACHED) ||
+ (ct_seg->flags & CT_SEGMENT_F_CLIENT_DETACHED))
+ continue;
+ fs = segment_manager_get_segment (sm, ct_seg->segment_index);
+ free_bytes = fifo_segment_available_bytes (fs);
+ max_fifos = fifo_segment_size (fs) / pair_bytes;
+ if (free_bytes > max_free_bytes &&
+ fifo_segment_num_fifos (fs) / 2 < max_fifos)
+ {
+ max_free_bytes = free_bytes;
+ res = ct_seg;
+ }
+ }
+
+ return res;
}
-int
-ct_init_local_session (app_worker_t * client_wrk, app_worker_t * server_wrk,
- ct_connection_t * ct, session_t * ls, session_t * ll)
-{
- u32 seg_size, evt_q_sz, evt_q_elts, margin = 16 << 10;
- u32 round_rx_fifo_sz, round_tx_fifo_sz, sm_index;
- segment_manager_properties_t *props, *cprops;
- svm_fifo_segment_private_t *seg;
- application_t *server, *client;
+static int
+ct_init_accepted_session (app_worker_t *server_wrk, ct_connection_t *ct,
+ session_t *ls, session_t *ll)
+{
+ u32 sm_index, pair_bytes, seg_ctx_index = ~0, ct_seg_index = ~0;
+ u64 seg_handle, table_handle, seg_size;
+ segment_manager_props_t *props;
+ const u32 margin = 16 << 10;
+ ct_segments_ctx_t *seg_ctx;
+ ct_main_t *cm = &ct_main;
+ application_t *server;
segment_manager_t *sm;
- svm_msg_q_t *sq, *cq;
- u64 segment_handle;
- int seg_index, rv;
+ ct_segment_t *ct_seg;
+ fifo_segment_t *fs;
+ int rv, fs_index;
+ uword *spp;
+ sm = app_worker_get_listen_segment_manager (server_wrk, ll);
+ sm_index = segment_manager_index (sm);
server = application_get (server_wrk->app_index);
- client = application_get (client_wrk->app_index);
-
props = application_segment_manager_properties (server);
- cprops = application_segment_manager_properties (client);
- evt_q_elts = props->evt_q_size + cprops->evt_q_size;
- evt_q_sz = segment_manager_evt_q_expected_size (evt_q_elts);
- round_rx_fifo_sz = 1 << max_log2 (props->rx_fifo_size);
- round_tx_fifo_sz = 1 << max_log2 (props->tx_fifo_size);
- seg_size = round_rx_fifo_sz + round_tx_fifo_sz + evt_q_sz + margin;
- sm = app_worker_get_listen_segment_manager (server_wrk, ll);
- seg_index = segment_manager_add_segment (sm, seg_size);
- if (seg_index < 0)
+ table_handle = ct->client_wrk << 16 | server_wrk->wrk_index;
+ table_handle = (u64) segment_manager_index (sm) << 32 | table_handle;
+
+ /*
+ * Check if we already have a segment that can hold the fifos
+ */
+
+ clib_rwlock_reader_lock (&cm->app_segs_lock);
+
+ spp = hash_get (cm->app_segs_ctxs_table, table_handle);
+ if (spp)
{
- clib_warning ("failed to add new cut-through segment");
- return seg_index;
+ seg_ctx_index = *spp;
+ seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, seg_ctx_index);
+ pair_bytes = props->rx_fifo_size + props->tx_fifo_size + margin;
+ ct_seg = ct_lookup_free_segment (sm, seg_ctx, pair_bytes);
+ if (ct_seg)
+ {
+ ct_seg_index = ct_seg - seg_ctx->segments;
+ fs_index = ct_seg->segment_index;
+ __atomic_add_fetch (&ct_seg->server_n_sessions, 1, __ATOMIC_RELAXED);
+ }
+ }
+
+ clib_rwlock_reader_unlock (&cm->app_segs_lock);
+
+ /*
+ * No segment, try to alloc one and notify the server
+ */
+
+ if (ct_seg_index == ~0)
+ {
+ seg_size = clib_max (props->segment_size, 128 << 20);
+ fs_index = segment_manager_add_segment (sm, seg_size, 0);
+ if (fs_index < 0)
+ {
+ rv = -1;
+ goto failed;
+ }
+
+ /* Make sure the segment is not used for other fifos */
+ fs = segment_manager_get_segment_w_lock (sm, fs_index);
+ fifo_segment_flags (fs) |= FIFO_SEGMENT_F_CUSTOM_USE;
+ segment_manager_segment_reader_unlock (sm);
+
+ clib_rwlock_writer_lock (&cm->app_segs_lock);
+
+ if (seg_ctx_index == ~0)
+ {
+ pool_get_zero (cm->app_seg_ctxs, seg_ctx);
+ seg_ctx_index = seg_ctx - cm->app_seg_ctxs;
+ hash_set (cm->app_segs_ctxs_table, table_handle, seg_ctx_index);
+ seg_ctx->server_wrk = server_wrk->wrk_index;
+ seg_ctx->client_wrk = ct->client_wrk;
+ seg_ctx->sm_index = sm_index;
+ }
+ else
+ seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, seg_ctx_index);
+
+ pool_get_zero (seg_ctx->segments, ct_seg);
+ ct_seg->segment_index = fs_index;
+ ct_seg->server_n_sessions += 1;
+ ct_seg_index = ct_seg - seg_ctx->segments;
+
+ clib_rwlock_writer_unlock (&cm->app_segs_lock);
+
+ /* New segment, notify the server. Client notification sent after
+ * server accepts the connection */
+ seg_handle = segment_manager_make_segment_handle (sm_index, fs_index);
+ if ((rv = app_worker_add_segment_notify (server_wrk, seg_handle)))
+ {
+ segment_manager_lock_and_del_segment (sm, fs_index);
+
+ clib_rwlock_writer_lock (&cm->app_segs_lock);
+ pool_put_index (seg_ctx->segments, ct_seg_index);
+ clib_rwlock_writer_unlock (&cm->app_segs_lock);
+
+ goto failed_fix_count;
+ }
}
- seg = segment_manager_get_segment_w_lock (sm, seg_index);
- sq = segment_manager_alloc_queue (seg, props);
- cq = segment_manager_alloc_queue (seg, cprops);
-
- if (props->use_mq_eventfd)
- ct_session_fix_eventds (sq, cq);
-
- ct->server_evt_q = pointer_to_uword (sq);
- ct->client_evt_q = pointer_to_uword (cq);
- rv = segment_manager_try_alloc_fifos (seg, props->rx_fifo_size,
- props->tx_fifo_size, &ls->rx_fifo,
- &ls->tx_fifo);
+
+ /*
+ * Allocate and initialize the fifos
+ */
+ fs = segment_manager_get_segment_w_lock (sm, fs_index);
+ rv = segment_manager_try_alloc_fifos (
+ fs, ls->thread_index, props->rx_fifo_size, props->tx_fifo_size,
+ &ls->rx_fifo, &ls->tx_fifo);
if (rv)
{
- clib_warning ("failed to add fifos in cut-through segment");
segment_manager_segment_reader_unlock (sm);
- goto failed;
+ goto failed_fix_count;
}
- sm_index = segment_manager_index (sm);
- ls->rx_fifo->ct_session_index = ls->session_index;
- ls->tx_fifo->ct_session_index = ls->session_index;
+ ls->rx_fifo->shr->master_session_index = ls->session_index;
+ ls->tx_fifo->shr->master_session_index = ls->session_index;
+ ls->rx_fifo->master_thread_index = ls->thread_index;
+ ls->tx_fifo->master_thread_index = ls->thread_index;
ls->rx_fifo->segment_manager = sm_index;
ls->tx_fifo->segment_manager = sm_index;
- ls->rx_fifo->segment_index = seg_index;
- ls->tx_fifo->segment_index = seg_index;
- ls->svm_segment_index = seg_index;
+ ls->rx_fifo->segment_index = fs_index;
+ ls->tx_fifo->segment_index = fs_index;
- segment_handle = segment_manager_segment_handle (sm, seg);
- if ((rv = app_worker_add_segment_notify (server_wrk, segment_handle)))
- {
- clib_warning ("failed to notify server of new segment");
- segment_manager_segment_reader_unlock (sm);
- goto failed;
- }
+ seg_handle = segment_manager_segment_handle (sm, fs);
segment_manager_segment_reader_unlock (sm);
- ct->segment_handle = segment_handle;
+
+ ct->segment_handle = seg_handle;
+ ct->seg_ctx_index = seg_ctx_index;
+ ct->ct_seg_index = ct_seg_index;
return 0;
+failed_fix_count:
+
+ clib_rwlock_reader_lock (&cm->app_segs_lock);
+
+ seg_ctx = pool_elt_at_index (cm->app_seg_ctxs, seg_ctx_index);
+ ct_seg = pool_elt_at_index (seg_ctx->segments, ct_seg_index);
+ __atomic_sub_fetch (&ct_seg->server_n_sessions, 1, __ATOMIC_RELAXED);
+
+ clib_rwlock_reader_unlock (&cm->app_segs_lock);
+
failed:
- segment_manager_del_segment (sm, seg);
return rv;
}
-int
-ct_connect (app_worker_t * client_wrk, session_t * ll,
- session_endpoint_cfg_t * sep)
+static void
+ct_accept_rpc_wrk_handler (void *accept_args)
{
- u32 cct_index, ll_index, ll_ct_index;
- ct_connection_t *sct, *cct, *ll_ct;
+ u32 cct_index, ho_index, thread_index, ll_index;
+ ct_connection_t *sct, *cct, *ho;
+ transport_connection_t *ll_ct;
app_worker_t *server_wrk;
- session_t *ss;
+ session_t *ss, *ll;
- ll_index = ll->session_index;
- ll_ct_index = ll->connection_index;
-
- cct = ct_connection_alloc ();
+ /*
+ * Alloc client ct and initialize from ho
+ */
+ thread_index = vlib_get_thread_index ();
+ cct = ct_connection_alloc (thread_index);
cct_index = cct->c_c_index;
- sct = ct_connection_alloc ();
- ll_ct = ct_connection_get (ll_ct_index);
- /*
- * Alloc and init client transport
+ ho_index = pointer_to_uword (accept_args);
+ ho = ct_connection_get (ho_index, 0);
+
+ /* Unlikely but half-open session and transport could have been freed */
+ if (PREDICT_FALSE (!ho))
+ {
+ ct_connection_free (cct);
+ return;
+ }
+
+ clib_memcpy (cct, ho, sizeof (*ho));
+ cct->c_c_index = cct_index;
+ cct->c_thread_index = thread_index;
+ cct->flags |= CT_CONN_F_HALF_OPEN;
+
+ /* Notify session layer that half-open is on a different thread
+ * and mark ho connection index reusable. Avoids another rpc
*/
- cct = ct_connection_get (cct_index);
- cct->c_thread_index = 0;
- cct->c_rmt_port = sep->port;
- cct->c_lcl_port = 0;
- cct->c_is_ip4 = sep->is_ip4;
- clib_memcpy (&cct->c_rmt_ip, &sep->ip, sizeof (sep->ip));
- cct->actual_tp = ll_ct->actual_tp;
+ session_half_open_migrate_notify (&cct->connection);
+ session_half_open_migrated_notify (&cct->connection);
+ ct_half_open_add_reusable (ho_index);
/*
- * Init server transport
+ * Alloc and init server transport
*/
- sct->c_thread_index = 0;
+
+ ll_index = cct->peer_index;
+ ll = listen_session_get (ll_index);
+ sct = ct_connection_alloc (thread_index);
+ /* Transport not necessarily ct but it might, so grab after sct alloc */
+ ll_ct = listen_session_get_transport (ll);
+
+ /* Make sure cct is valid after sct alloc */
+ cct = ct_connection_get (cct_index, thread_index);
+
sct->c_rmt_port = 0;
- sct->c_lcl_port = ll_ct->c_lcl_port;
- sct->c_is_ip4 = sep->is_ip4;
- clib_memcpy (&sct->c_lcl_ip, &ll_ct->c_lcl_ip, sizeof (ll_ct->c_lcl_ip));
- sct->client_wrk = client_wrk->wrk_index;
+ sct->c_lcl_port = ll_ct->lcl_port;
+ sct->c_is_ip4 = cct->c_is_ip4;
+ clib_memcpy (&sct->c_lcl_ip, &ll_ct->lcl_ip, sizeof (ll_ct->lcl_ip));
+ sct->client_wrk = cct->client_wrk;
sct->c_proto = TRANSPORT_PROTO_NONE;
- sct->client_opaque = sep->opaque;
- sct->actual_tp = ll_ct->actual_tp;
+ sct->client_opaque = cct->client_opaque;
+ sct->actual_tp = cct->actual_tp;
sct->peer_index = cct->c_c_index;
cct->peer_index = sct->c_c_index;
* Accept server session. Client session is created only after
* server confirms accept.
*/
- ss = session_alloc (0);
+ ss = session_alloc (thread_index);
ll = listen_session_get (ll_index);
- ss->session_type = ll->session_type;
+ ss->session_type = session_type_from_proto_and_ip (TRANSPORT_PROTO_NONE,
+ sct->c_is_ip4);
ss->connection_index = sct->c_c_index;
- ss->listener_index = ll->session_index;
+ ss->listener_handle = listen_session_get_handle (ll);
ss->session_state = SESSION_STATE_CREATED;
server_wrk = application_listener_select_worker (ll);
sct->c_s_index = ss->session_index;
sct->server_wrk = ss->app_wrk_index;
- if (ct_init_local_session (client_wrk, server_wrk, sct, ss, ll))
+ if (ct_init_accepted_session (server_wrk, sct, ss, ll))
{
- clib_warning ("failed");
ct_connection_free (sct);
session_free (ss);
- return -1;
+ return;
}
ss->session_state = SESSION_STATE_ACCEPTING;
if (app_worker_accept_notify (server_wrk, ss))
{
- clib_warning ("failed");
+ ct_session_dealloc_fifos (sct, ss->rx_fifo, ss->tx_fifo);
ct_connection_free (sct);
- session_free_w_fifos (ss);
- return -1;
+ session_free (ss);
+ return;
}
- cct->client_evt_q = sct->client_evt_q;
- cct->server_evt_q = sct->server_evt_q;
cct->segment_handle = sct->segment_handle;
+}
- return 0;
+static int
+ct_connect (app_worker_t * client_wrk, session_t * ll,
+ session_endpoint_cfg_t * sep)
+{
+ u32 thread_index, ho_index;
+ ct_main_t *cm = &ct_main;
+ ct_connection_t *ho;
+
+ /* Simple round-robin policy for spreading sessions over workers. We skip
+ * thread index 0, i.e., offset the index by 1, when we have workers as it
+ * is the one dedicated to main thread. Note that n_workers does not include
+ * main thread */
+ cm->n_sessions += 1;
+ thread_index = cm->n_workers ? (cm->n_sessions % cm->n_workers) + 1 : 0;
+
+ /*
+ * Alloc and init client half-open transport
+ */
+
+ ho = ct_half_open_alloc ();
+ ho_index = ho->c_c_index;
+ ho->c_rmt_port = sep->port;
+ ho->c_lcl_port = 0;
+ ho->c_is_ip4 = sep->is_ip4;
+ ho->client_opaque = sep->opaque;
+ ho->client_wrk = client_wrk->wrk_index;
+ ho->peer_index = ll->session_index;
+ ho->c_proto = TRANSPORT_PROTO_NONE;
+ ho->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
+ clib_memcpy (&ho->c_rmt_ip, &sep->ip, sizeof (sep->ip));
+ ho->flags |= CT_CONN_F_CLIENT;
+ ho->c_s_index = ~0;
+ ho->actual_tp = sep->transport_proto;
+
+ /*
+ * Accept connection on thread selected above. Connected reply comes
+ * after server accepts the connection.
+ */
+
+ session_send_rpc_evt_to_thread_force (thread_index,
+ ct_accept_rpc_wrk_handler,
+ uword_to_pointer (ho_index, void *));
+
+ return ho_index;
}
-u32
+static u32
ct_start_listen (u32 app_listener_index, transport_endpoint_t * tep)
{
session_endpoint_cfg_t *sep;
ct_connection_t *ct;
sep = (session_endpoint_cfg_t *) tep;
- ct = ct_connection_alloc ();
+ ct = ct_connection_alloc (0);
ct->server_wrk = sep->app_wrk_index;
ct->c_is_ip4 = sep->is_ip4;
clib_memcpy (&ct->c_lcl_ip, &sep->ip, sizeof (sep->ip));
ct->c_lcl_port = sep->port;
+ ct->c_s_index = app_listener_index;
ct->actual_tp = sep->transport_proto;
return ct->c_c_index;
}
-u32
+static u32
ct_stop_listen (u32 ct_index)
{
ct_connection_t *ct;
- ct = ct_connection_get (ct_index);
+ ct = ct_connection_get (ct_index, 0);
ct_connection_free (ct);
return 0;
}
-transport_connection_t *
+static transport_connection_t *
ct_listener_get (u32 ct_index)
{
- return (transport_connection_t *) ct_connection_get (ct_index);
+ return (transport_connection_t *) ct_connection_get (ct_index, 0);
}
-int
+static transport_connection_t *
+ct_half_open_get (u32 ct_index)
+{
+ return (transport_connection_t *) ct_connection_get (ct_index, 0);
+}
+
+static void
+ct_session_cleanup (u32 conn_index, u32 thread_index)
+{
+ ct_connection_t *ct, *peer_ct;
+
+ ct = ct_connection_get (conn_index, thread_index);
+ if (!ct)
+ return;
+
+ peer_ct = ct_connection_get (ct->peer_index, thread_index);
+ if (peer_ct)
+ peer_ct->peer_index = ~0;
+
+ ct_connection_free (ct);
+}
+
+static void
+ct_cleanup_ho (u32 ho_index)
+{
+ ct_connection_free (ct_connection_get (ho_index, 0));
+}
+
+static int
ct_session_connect (transport_endpoint_cfg_t * tep)
{
session_endpoint_cfg_t *sep_ext;
- session_endpoint_t *sep;
+ session_endpoint_t _sep, *sep = &_sep;
app_worker_t *app_wrk;
session_handle_t lh;
application_t *app;
u8 fib_proto;
sep_ext = (session_endpoint_cfg_t *) tep;
- sep = (session_endpoint_t *) tep;
+ _sep = *(session_endpoint_t *) tep;
app_wrk = app_worker_get (sep_ext->app_wrk_index);
app = application_get (app_wrk->app_index);
table_index = application_local_session_table (app);
lh = session_lookup_local_endpoint (table_index, sep);
if (lh == SESSION_DROP_HANDLE)
- return VNET_API_ERROR_APP_CONNECT_FILTERED;
+ return SESSION_E_FILTERED;
if (lh == SESSION_INVALID_HANDLE)
goto global_scope;
global_scope:
if (session_endpoint_is_local (sep))
- return VNET_API_ERROR_SESSION_CONNECT;
+ return SESSION_E_NOROUTE;
if (!application_has_global_scope (app))
- return VNET_API_ERROR_APP_CONNECT_SCOPE;
+ return SESSION_E_SCOPE;
fib_proto = session_endpoint_fib_proto (sep);
- table_index = application_session_table (app, fib_proto);
- ll = session_lookup_listener (table_index, sep);
+ table_index = session_lookup_get_index_for_fib (fib_proto, sep->fib_index);
+ ll = session_lookup_listener_wildcard (table_index, sep);
- if (ll)
+ /* Avoid connecting app to own listener */
+ if (ll && ll->app_index != app->app_index)
return ct_connect (app_wrk, ll, sep_ext);
/* Failed to connect but no error */
- return 1;
+ return SESSION_E_LOCAL_CONNECT;
}
-void
+static void
ct_session_close (u32 ct_index, u32 thread_index)
{
ct_connection_t *ct, *peer_ct;
+ app_worker_t *app_wrk;
session_t *s;
- ct = ct_connection_get (ct_index);
- peer_ct = ct_connection_get (ct->peer_index);
+ ct = ct_connection_get (ct_index, thread_index);
+ peer_ct = ct_connection_get (ct->peer_index, thread_index);
if (peer_ct)
{
peer_ct->peer_index = ~0;
- session_transport_closing_notify (&peer_ct->connection);
+ /* Make sure session was allocated */
+ if (peer_ct->flags & CT_CONN_F_HALF_OPEN)
+ {
+ app_wrk = app_worker_get (peer_ct->client_wrk);
+ app_worker_connect_notify (app_wrk, 0, SESSION_E_REFUSED,
+ peer_ct->client_opaque);
+ }
+ else if (peer_ct->c_s_index != ~0)
+ session_transport_closing_notify (&peer_ct->connection);
+ else
+ ct_connection_free (peer_ct);
+ }
+
+ s = session_get (ct->c_s_index, ct->c_thread_index);
+
+ if (ct->flags & CT_CONN_F_CLIENT)
+ {
+ /* Normal free for client session as the fifos are allocated through
+ * the connects segment manager in a segment that's not shared with
+ * the server */
+ session_free_w_fifos (s);
+ ct_session_dealloc_fifos (ct, ct->client_rx_fifo, ct->client_tx_fifo);
+ }
+ else
+ {
+ /* Manual session and fifo segment cleanup to avoid implicit
+ * segment manager cleanups and notifications */
+ app_wrk = app_worker_get_if_valid (s->app_wrk_index);
+ if (app_wrk)
+ app_worker_cleanup_notify (app_wrk, s, SESSION_CLEANUP_SESSION);
+
+ ct_session_dealloc_fifos (ct, s->rx_fifo, s->tx_fifo);
+ session_free (s);
}
- s = session_get (ct->c_s_index, 0);
- app_worker_del_segment_notify (app_worker_get (s->app_wrk_index),
- ct->segment_handle);
- session_free_w_fifos (s);
ct_connection_free (ct);
}
-transport_connection_t *
+static transport_connection_t *
ct_session_get (u32 ct_index, u32 thread_index)
{
- return (transport_connection_t *) ct_connection_get (ct_index);
+ return (transport_connection_t *) ct_connection_get (ct_index,
+ thread_index);
}
static u8 *
return s;
}
-u8 *
+static int
+ct_custom_tx (void *session, transport_send_params_t * sp)
+{
+ session_t *s = (session_t *) session;
+ if (session_has_transport (s))
+ return 0;
+ /* If event enqueued towards peer, remove from scheduler and remove
+ * session tx flag, i.e., accept new tx events. Unset fifo flag now to
+ * avoid missing events if peer did not clear fifo flag yet, which is
+ * interpreted as successful notification and session is descheduled. */
+ svm_fifo_unset_event (s->tx_fifo);
+ if (!ct_session_tx (s))
+ sp->flags = TRANSPORT_SND_F_DESCHED;
+
+ /* The scheduler uses packet count as a means of upper bounding the amount
+ * of work done per dispatch. So make it look like we have sent something */
+ return 1;
+}
+
+static int
+ct_app_rx_evt (transport_connection_t * tc)
+{
+ ct_connection_t *ct = (ct_connection_t *) tc, *peer_ct;
+ session_t *ps;
+
+ peer_ct = ct_connection_get (ct->peer_index, tc->thread_index);
+ if (!peer_ct)
+ return -1;
+ ps = session_get (peer_ct->c_s_index, peer_ct->c_thread_index);
+ return session_dequeue_notify (ps);
+}
+
+static u8 *
format_ct_listener (u8 * s, va_list * args)
{
u32 tc_index = va_arg (*args, u32);
+ u32 __clib_unused thread_index = va_arg (*args, u32);
u32 __clib_unused verbose = va_arg (*args, u32);
- ct_connection_t *ct = ct_connection_get (tc_index);
- s = format (s, "%-50U", format_ct_connection_id, ct);
+ ct_connection_t *ct = ct_connection_get (tc_index, 0);
+ s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_ct_connection_id, ct);
+ if (verbose)
+ s = format (s, "%-" SESSION_CLI_STATE_LEN "s", "LISTEN");
+ return s;
+}
+
+static u8 *
+format_ct_half_open (u8 *s, va_list *args)
+{
+ u32 ho_index = va_arg (*args, u32);
+ u32 verbose = va_arg (*args, u32);
+ ct_connection_t *ct = ct_connection_get (ho_index, 0);
+ s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_ct_connection_id, ct);
if (verbose)
- s = format (s, "%-15s", "LISTEN");
+ s = format (s, "%-" SESSION_CLI_STATE_LEN "s", "HALF-OPEN");
return s;
}
-u8 *
+static u8 *
format_ct_connection (u8 * s, va_list * args)
{
ct_connection_t *ct = va_arg (*args, ct_connection_t *);
if (!ct)
return s;
- s = format (s, "%-50U", format_ct_connection_id, ct);
+ s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_ct_connection_id, ct);
if (verbose)
{
- s = format (s, "%-15s", "ESTABLISHED");
+ s = format (s, "%-" SESSION_CLI_STATE_LEN "s", "ESTABLISHED");
if (verbose > 1)
{
s = format (s, "\n");
return s;
}
-u8 *
+static u8 *
format_ct_session (u8 * s, va_list * args)
{
u32 ct_index = va_arg (*args, u32);
- u32 __clib_unused thread_index = va_arg (*args, u32);
+ u32 thread_index = va_arg (*args, u32);
u32 verbose = va_arg (*args, u32);
ct_connection_t *ct;
- ct = ct_connection_get (ct_index);
+ ct = ct_connection_get (ct_index, thread_index);
if (!ct)
{
s = format (s, "empty\n");
return s;
}
+clib_error_t *
+ct_enable_disable (vlib_main_t * vm, u8 is_en)
+{
+ ct_main_t *cm = &ct_main;
+
+ cm->n_workers = vlib_num_workers ();
+ vec_validate (cm->connections, cm->n_workers);
+ clib_spinlock_init (&cm->ho_reuseable_lock);
+ clib_rwlock_init (&cm->app_segs_lock);
+ return 0;
+}
+
/* *INDENT-OFF* */
-const static transport_proto_vft_t cut_thru_proto = {
+static const transport_proto_vft_t cut_thru_proto = {
+ .enable = ct_enable_disable,
.start_listen = ct_start_listen,
.stop_listen = ct_stop_listen,
+ .get_connection = ct_session_get,
.get_listener = ct_listener_get,
+ .get_half_open = ct_half_open_get,
+ .cleanup = ct_session_cleanup,
+ .cleanup_ho = ct_cleanup_ho,
.connect = ct_session_connect,
.close = ct_session_close,
- .get_connection = ct_session_get,
- .tx_type = TRANSPORT_TX_INTERNAL,
- .service_type = TRANSPORT_SERVICE_APP,
+ .custom_tx = ct_custom_tx,
+ .app_rx_evt = ct_app_rx_evt,
.format_listener = format_ct_listener,
+ .format_half_open = format_ct_half_open,
.format_connection = format_ct_session,
+ .transport_options = {
+ .name = "ct",
+ .short_name = "C",
+ .tx_type = TRANSPORT_TX_INTERNAL,
+ .service_type = TRANSPORT_SERVICE_VC,
+ },
};
/* *INDENT-ON* */
+int
+ct_session_tx (session_t * s)
+{
+ ct_connection_t *ct, *peer_ct;
+ session_t *peer_s;
+
+ ct = (ct_connection_t *) session_get_transport (s);
+ peer_ct = ct_connection_get (ct->peer_index, ct->c_thread_index);
+ if (!peer_ct)
+ return 0;
+ peer_s = session_get (peer_ct->c_s_index, peer_ct->c_thread_index);
+ if (peer_s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
+ return 0;
+ return session_enqueue_notify (peer_s);
+}
+
static clib_error_t *
ct_transport_init (vlib_main_t * vm)
{
transport_register_protocol (TRANSPORT_PROTO_NONE, &cut_thru_proto,
FIB_PROTOCOL_IP4, ~0);
+ transport_register_protocol (TRANSPORT_PROTO_NONE, &cut_thru_proto,
+ FIB_PROTOCOL_IP6, ~0);
return 0;
}
Code Review / vpp.git / blobdiff