Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017 Cisco and/or its affiliates. |
| 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at: |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | /** |
| 16 | * @file |
| 17 | * @brief Session and session manager |
| 18 | */ |
| 19 | |
| 20 | #include <vnet/session/session.h> |
Florin Coras | 04e5344 | 2017-07-16 17:12:15 -0700 | [diff] [blame] | 21 | #include <vnet/session/session_debug.h> |
| 22 | #include <vnet/session/application.h> |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 23 | #include <vlibmemory/api.h> |
| 24 | #include <vnet/dpo/load_balance.h> |
| 25 | #include <vnet/fib/ip4_fib.h> |
Florin Coras | a0b34a7 | 2017-03-07 01:20:52 -0800 | [diff] [blame] | 26 | #include <vnet/tcp/tcp.h> |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 27 | |
| 28 | session_manager_main_t session_manager_main; |
Florin Coras | 04e5344 | 2017-07-16 17:12:15 -0700 | [diff] [blame] | 29 | extern transport_proto_vft_t *tp_vfts; |
Florin Coras | 3eb5062 | 2017-07-13 01:24:57 -0400 | [diff] [blame] | 30 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 31 | static void |
| 32 | session_send_evt_to_thread (u64 session_handle, fifo_event_type_t evt_type, |
| 33 | u32 thread_index, void *fp, void *rpc_args) |
| 34 | { |
| 35 | u32 tries = 0; |
| 36 | session_fifo_event_t evt = { {0}, }; |
| 37 | unix_shared_memory_queue_t *q; |
| 38 | |
| 39 | evt.event_type = evt_type; |
| 40 | if (evt_type == FIFO_EVENT_RPC) |
| 41 | { |
| 42 | evt.rpc_args.fp = fp; |
| 43 | evt.rpc_args.arg = rpc_args; |
| 44 | } |
| 45 | else |
| 46 | evt.session_handle = session_handle; |
| 47 | |
| 48 | q = session_manager_get_vpp_event_queue (thread_index); |
| 49 | while (unix_shared_memory_queue_add (q, (u8 *) & evt, 1)) |
| 50 | { |
| 51 | if (tries++ == 3) |
| 52 | { |
| 53 | SESSION_DBG ("failed to enqueue evt"); |
| 54 | break; |
| 55 | } |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | void |
| 60 | session_send_session_evt_to_thread (u64 session_handle, |
| 61 | fifo_event_type_t evt_type, |
| 62 | u32 thread_index) |
| 63 | { |
| 64 | session_send_evt_to_thread (session_handle, evt_type, thread_index, 0, 0); |
| 65 | } |
| 66 | |
| 67 | void |
| 68 | session_send_rpc_evt_to_thread (u32 thread_index, void *fp, void *rpc_args) |
| 69 | { |
| 70 | if (thread_index != vlib_get_thread_index ()) |
| 71 | session_send_evt_to_thread (0, FIFO_EVENT_RPC, thread_index, fp, |
| 72 | rpc_args); |
| 73 | else |
| 74 | { |
| 75 | void (*fnp) (void *) = fp; |
| 76 | fnp (rpc_args); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | stream_session_t * |
| 81 | session_alloc (u32 thread_index) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 82 | { |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 83 | session_manager_main_t *smm = &session_manager_main; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 84 | stream_session_t *s; |
| 85 | u8 will_expand = 0; |
| 86 | pool_get_aligned_will_expand (smm->sessions[thread_index], will_expand, |
| 87 | CLIB_CACHE_LINE_BYTES); |
| 88 | /* If we have peekers, let them finish */ |
| 89 | if (PREDICT_FALSE (will_expand)) |
| 90 | { |
| 91 | clib_spinlock_lock_if_init (&smm->peekers_write_locks[thread_index]); |
| 92 | pool_get_aligned (session_manager_main.sessions[thread_index], s, |
| 93 | CLIB_CACHE_LINE_BYTES); |
| 94 | clib_spinlock_unlock_if_init (&smm->peekers_write_locks[thread_index]); |
| 95 | } |
| 96 | else |
| 97 | { |
| 98 | pool_get_aligned (session_manager_main.sessions[thread_index], s, |
| 99 | CLIB_CACHE_LINE_BYTES); |
| 100 | } |
| 101 | memset (s, 0, sizeof (*s)); |
| 102 | s->session_index = s - session_manager_main.sessions[thread_index]; |
| 103 | s->thread_index = thread_index; |
| 104 | return s; |
| 105 | } |
| 106 | |
| 107 | static void |
| 108 | session_free (stream_session_t * s) |
| 109 | { |
| 110 | pool_put (session_manager_main.sessions[s->thread_index], s); |
| 111 | if (CLIB_DEBUG) |
| 112 | memset (s, 0xFA, sizeof (*s)); |
| 113 | } |
| 114 | |
| 115 | static int |
| 116 | session_alloc_fifos (segment_manager_t * sm, stream_session_t * s) |
| 117 | { |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 118 | svm_fifo_t *server_rx_fifo = 0, *server_tx_fifo = 0; |
| 119 | u32 fifo_segment_index; |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 120 | int rv; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 121 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 122 | if ((rv = segment_manager_alloc_session_fifos (sm, &server_rx_fifo, |
| 123 | &server_tx_fifo, |
| 124 | &fifo_segment_index))) |
| 125 | return rv; |
| 126 | /* Initialize backpointers */ |
| 127 | server_rx_fifo->master_session_index = s->session_index; |
| 128 | server_rx_fifo->master_thread_index = s->thread_index; |
| 129 | |
| 130 | server_tx_fifo->master_session_index = s->session_index; |
| 131 | server_tx_fifo->master_thread_index = s->thread_index; |
| 132 | |
| 133 | s->server_rx_fifo = server_rx_fifo; |
| 134 | s->server_tx_fifo = server_tx_fifo; |
| 135 | s->svm_segment_index = fifo_segment_index; |
| 136 | return 0; |
| 137 | } |
| 138 | |
| 139 | static stream_session_t * |
| 140 | session_alloc_for_connection (transport_connection_t * tc) |
| 141 | { |
| 142 | stream_session_t *s; |
| 143 | u32 thread_index = tc->thread_index; |
| 144 | |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 145 | ASSERT (thread_index == vlib_get_thread_index ()); |
| 146 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 147 | s = session_alloc (thread_index); |
| 148 | s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 149 | s->session_state = SESSION_STATE_CONNECTING; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 150 | s->thread_index = thread_index; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 151 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 152 | /* Attach transport to session and vice versa */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 153 | s->connection_index = tc->c_index; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 154 | tc->s_index = s->session_index; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 155 | return s; |
| 156 | } |
| 157 | |
| 158 | static int |
| 159 | session_alloc_and_init (segment_manager_t * sm, transport_connection_t * tc, |
| 160 | u8 alloc_fifos, stream_session_t ** ret_s) |
| 161 | { |
| 162 | stream_session_t *s; |
| 163 | int rv; |
| 164 | |
| 165 | s = session_alloc_for_connection (tc); |
| 166 | if (alloc_fifos && (rv = session_alloc_fifos (sm, s))) |
| 167 | { |
| 168 | session_free (s); |
| 169 | return rv; |
| 170 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 171 | |
| 172 | /* Add to the main lookup table */ |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 173 | session_lookup_add_connection (tc, session_handle (s)); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 174 | |
| 175 | *ret_s = s; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 176 | return 0; |
| 177 | } |
| 178 | |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 179 | /** |
| 180 | * Discards bytes from buffer chain |
| 181 | * |
| 182 | * It discards n_bytes_to_drop starting at first buffer after chain_b |
| 183 | */ |
| 184 | always_inline void |
| 185 | session_enqueue_discard_chain_bytes (vlib_main_t * vm, vlib_buffer_t * b, |
| 186 | vlib_buffer_t ** chain_b, |
| 187 | u32 n_bytes_to_drop) |
| 188 | { |
| 189 | vlib_buffer_t *next = *chain_b; |
| 190 | u32 to_drop = n_bytes_to_drop; |
| 191 | ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT); |
| 192 | while (to_drop && (next->flags & VLIB_BUFFER_NEXT_PRESENT)) |
| 193 | { |
| 194 | next = vlib_get_buffer (vm, next->next_buffer); |
| 195 | if (next->current_length > to_drop) |
| 196 | { |
| 197 | vlib_buffer_advance (next, to_drop); |
| 198 | to_drop = 0; |
| 199 | } |
| 200 | else |
| 201 | { |
| 202 | to_drop -= next->current_length; |
| 203 | next->current_length = 0; |
| 204 | } |
| 205 | } |
| 206 | *chain_b = next; |
| 207 | |
| 208 | if (to_drop == 0) |
| 209 | b->total_length_not_including_first_buffer -= n_bytes_to_drop; |
| 210 | } |
| 211 | |
| 212 | /** |
| 213 | * Enqueue buffer chain tail |
| 214 | */ |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 215 | always_inline int |
| 216 | session_enqueue_chain_tail (stream_session_t * s, vlib_buffer_t * b, |
| 217 | u32 offset, u8 is_in_order) |
| 218 | { |
| 219 | vlib_buffer_t *chain_b; |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 220 | u32 chain_bi, len, diff; |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 221 | vlib_main_t *vm = vlib_get_main (); |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 222 | u8 *data; |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 223 | u32 written = 0; |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 224 | int rv = 0; |
| 225 | |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 226 | if (is_in_order && offset) |
| 227 | { |
| 228 | diff = offset - b->current_length; |
| 229 | if (diff > b->total_length_not_including_first_buffer) |
| 230 | return 0; |
| 231 | chain_b = b; |
| 232 | session_enqueue_discard_chain_bytes (vm, b, &chain_b, diff); |
| 233 | chain_bi = vlib_get_buffer_index (vm, chain_b); |
| 234 | } |
| 235 | else |
| 236 | chain_bi = b->next_buffer; |
| 237 | |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 238 | do |
| 239 | { |
| 240 | chain_b = vlib_get_buffer (vm, chain_bi); |
| 241 | data = vlib_buffer_get_current (chain_b); |
| 242 | len = chain_b->current_length; |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 243 | if (!len) |
| 244 | continue; |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 245 | if (is_in_order) |
| 246 | { |
| 247 | rv = svm_fifo_enqueue_nowait (s->server_rx_fifo, len, data); |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 248 | if (rv == len) |
| 249 | { |
| 250 | written += rv; |
| 251 | } |
| 252 | else if (rv < len) |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 253 | { |
| 254 | return (rv > 0) ? (written + rv) : written; |
| 255 | } |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 256 | else if (rv > len) |
| 257 | { |
| 258 | written += rv; |
| 259 | |
| 260 | /* written more than what was left in chain */ |
| 261 | if (written > b->total_length_not_including_first_buffer) |
| 262 | return written; |
| 263 | |
| 264 | /* drop the bytes that have already been delivered */ |
| 265 | session_enqueue_discard_chain_bytes (vm, b, &chain_b, rv - len); |
| 266 | } |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 267 | } |
| 268 | else |
| 269 | { |
| 270 | rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset, len, |
| 271 | data); |
| 272 | if (rv) |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 273 | { |
| 274 | clib_warning ("failed to enqueue multi-buffer seg"); |
| 275 | return -1; |
| 276 | } |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 277 | offset += len; |
| 278 | } |
| 279 | } |
| 280 | while ((chain_bi = (chain_b->flags & VLIB_BUFFER_NEXT_PRESENT) |
| 281 | ? chain_b->next_buffer : 0)); |
| 282 | |
| 283 | if (is_in_order) |
| 284 | return written; |
| 285 | |
| 286 | return 0; |
| 287 | } |
| 288 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 289 | /* |
| 290 | * Enqueue data for delivery to session peer. Does not notify peer of enqueue |
| 291 | * event but on request can queue notification events for later delivery by |
| 292 | * calling stream_server_flush_enqueue_events(). |
| 293 | * |
| 294 | * @param tc Transport connection which is to be enqueued data |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 295 | * @param b Buffer to be enqueued |
| 296 | * @param offset Offset at which to start enqueueing if out-of-order |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 297 | * @param queue_event Flag to indicate if peer is to be notified or if event |
| 298 | * is to be queued. The former is useful when more data is |
| 299 | * enqueued and only one event is to be generated. |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 300 | * @param is_in_order Flag to indicate if data is in order |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 301 | * @return Number of bytes enqueued or a negative value if enqueueing failed. |
| 302 | */ |
| 303 | int |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 304 | session_enqueue_stream_connection (transport_connection_t * tc, |
| 305 | vlib_buffer_t * b, u32 offset, |
| 306 | u8 queue_event, u8 is_in_order) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 307 | { |
| 308 | stream_session_t *s; |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 309 | int enqueued = 0, rv, in_order_off; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 310 | |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 311 | s = session_get (tc->s_index, tc->thread_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 312 | |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 313 | if (is_in_order) |
| 314 | { |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 315 | enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo, |
| 316 | b->current_length, |
| 317 | vlib_buffer_get_current (b)); |
| 318 | if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) |
| 319 | && enqueued >= 0)) |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 320 | { |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 321 | in_order_off = enqueued > b->current_length ? enqueued : 0; |
| 322 | rv = session_enqueue_chain_tail (s, b, in_order_off, 1); |
| 323 | if (rv > 0) |
| 324 | enqueued += rv; |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 325 | } |
| 326 | } |
| 327 | else |
| 328 | { |
| 329 | rv = svm_fifo_enqueue_with_offset (s->server_rx_fifo, offset, |
| 330 | b->current_length, |
| 331 | vlib_buffer_get_current (b)); |
| 332 | if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv)) |
Florin Coras | 1f152cd | 2017-08-18 19:28:03 -0700 | [diff] [blame] | 333 | session_enqueue_chain_tail (s, b, offset + b->current_length, 0); |
| 334 | /* if something was enqueued, report even this as success for ooo |
| 335 | * segment handling */ |
| 336 | return rv; |
Florin Coras | f6d68ed | 2017-05-07 19:12:02 -0700 | [diff] [blame] | 337 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 338 | |
| 339 | if (queue_event) |
| 340 | { |
| 341 | /* Queue RX event on this fifo. Eventually these will need to be flushed |
| 342 | * by calling stream_server_flush_enqueue_events () */ |
| 343 | session_manager_main_t *smm = vnet_get_session_manager_main (); |
| 344 | u32 thread_index = s->thread_index; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 345 | u32 enqueue_epoch = smm->current_enqueue_epoch[tc->proto][thread_index]; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 346 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 347 | if (s->enqueue_epoch != enqueue_epoch) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 348 | { |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 349 | s->enqueue_epoch = enqueue_epoch; |
| 350 | vec_add1 (smm->session_to_enqueue[tc->proto][thread_index], |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 351 | s - smm->sessions[thread_index]); |
| 352 | } |
| 353 | } |
| 354 | |
Chris Luke | b2bcad6 | 2017-09-18 08:51:22 -0400 | [diff] [blame] | 355 | return enqueued; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 356 | } |
| 357 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 358 | int |
| 359 | session_enqueue_dgram_connection (stream_session_t * s, vlib_buffer_t * b, |
| 360 | u8 proto, u8 queue_event) |
| 361 | { |
| 362 | int enqueued = 0, rv, in_order_off; |
| 363 | |
| 364 | if (svm_fifo_max_enqueue (s->server_rx_fifo) < b->current_length) |
| 365 | return -1; |
| 366 | enqueued = svm_fifo_enqueue_nowait (s->server_rx_fifo, b->current_length, |
| 367 | vlib_buffer_get_current (b)); |
| 368 | if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0)) |
| 369 | { |
| 370 | in_order_off = enqueued > b->current_length ? enqueued : 0; |
| 371 | rv = session_enqueue_chain_tail (s, b, in_order_off, 1); |
| 372 | if (rv > 0) |
| 373 | enqueued += rv; |
| 374 | } |
| 375 | if (queue_event) |
| 376 | { |
| 377 | /* Queue RX event on this fifo. Eventually these will need to be flushed |
| 378 | * by calling stream_server_flush_enqueue_events () */ |
| 379 | session_manager_main_t *smm = vnet_get_session_manager_main (); |
| 380 | u32 thread_index = s->thread_index; |
| 381 | u32 enqueue_epoch = smm->current_enqueue_epoch[proto][thread_index]; |
| 382 | |
| 383 | if (s->enqueue_epoch != enqueue_epoch) |
| 384 | { |
| 385 | s->enqueue_epoch = enqueue_epoch; |
| 386 | vec_add1 (smm->session_to_enqueue[proto][thread_index], |
| 387 | s - smm->sessions[thread_index]); |
| 388 | } |
| 389 | } |
| 390 | return enqueued; |
| 391 | } |
| 392 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 393 | /** Check if we have space in rx fifo to push more bytes */ |
| 394 | u8 |
| 395 | stream_session_no_space (transport_connection_t * tc, u32 thread_index, |
| 396 | u16 data_len) |
| 397 | { |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 398 | stream_session_t *s = session_get (tc->s_index, thread_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 399 | |
| 400 | if (PREDICT_FALSE (s->session_state != SESSION_STATE_READY)) |
| 401 | return 1; |
| 402 | |
| 403 | if (data_len > svm_fifo_max_enqueue (s->server_rx_fifo)) |
| 404 | return 1; |
| 405 | |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | u32 |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 410 | stream_session_tx_fifo_max_dequeue (transport_connection_t * tc) |
| 411 | { |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 412 | stream_session_t *s = session_get (tc->s_index, tc->thread_index); |
Florin Coras | b2215d6 | 2017-08-01 16:56:58 -0700 | [diff] [blame] | 413 | if (!s->server_tx_fifo) |
Florin Coras | 93992a9 | 2017-05-24 18:03:56 -0700 | [diff] [blame] | 414 | return 0; |
| 415 | return svm_fifo_max_dequeue (s->server_tx_fifo); |
| 416 | } |
| 417 | |
| 418 | int |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 419 | stream_session_peek_bytes (transport_connection_t * tc, u8 * buffer, |
| 420 | u32 offset, u32 max_bytes) |
| 421 | { |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 422 | stream_session_t *s = session_get (tc->s_index, tc->thread_index); |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 423 | return svm_fifo_peek (s->server_tx_fifo, offset, max_bytes, buffer); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | u32 |
| 427 | stream_session_dequeue_drop (transport_connection_t * tc, u32 max_bytes) |
| 428 | { |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 429 | stream_session_t *s = session_get (tc->s_index, tc->thread_index); |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 430 | return svm_fifo_dequeue_drop (s->server_tx_fifo, max_bytes); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 431 | } |
| 432 | |
| 433 | /** |
| 434 | * Notify session peer that new data has been enqueued. |
| 435 | * |
| 436 | * @param s Stream session for which the event is to be generated. |
| 437 | * @param block Flag to indicate if call should block if event queue is full. |
| 438 | * |
| 439 | * @return 0 on succes or negative number if failed to send notification. |
| 440 | */ |
| 441 | static int |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 442 | session_enqueue_notify (stream_session_t * s, u8 block) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 443 | { |
| 444 | application_t *app; |
| 445 | session_fifo_event_t evt; |
| 446 | unix_shared_memory_queue_t *q; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 447 | |
| 448 | if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED)) |
Florin Coras | 5095895 | 2017-08-29 14:50:13 -0700 | [diff] [blame] | 449 | { |
| 450 | /* Session is closed so app will never clean up. Flush rx fifo */ |
| 451 | u32 to_dequeue = svm_fifo_max_dequeue (s->server_rx_fifo); |
| 452 | if (to_dequeue) |
| 453 | svm_fifo_dequeue_drop (s->server_rx_fifo, to_dequeue); |
| 454 | return 0; |
| 455 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 456 | |
| 457 | /* Get session's server */ |
Dave Barach | 818eb54 | 2017-08-02 13:56:13 -0400 | [diff] [blame] | 458 | app = application_get_if_valid (s->app_index); |
| 459 | |
| 460 | if (PREDICT_FALSE (app == 0)) |
| 461 | { |
| 462 | clib_warning ("invalid s->app_index = %d", s->app_index); |
| 463 | return 0; |
| 464 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 465 | |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 466 | /* Built-in server? Hand event to the callback... */ |
| 467 | if (app->cb_fns.builtin_server_rx_callback) |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 468 | return app->cb_fns.builtin_server_rx_callback (s); |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 469 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 470 | /* If no event, send one */ |
| 471 | if (svm_fifo_set_event (s->server_rx_fifo)) |
| 472 | { |
| 473 | /* Fabricate event */ |
| 474 | evt.fifo = s->server_rx_fifo; |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 475 | evt.event_type = FIFO_EVENT_APP_RX; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 476 | |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 477 | /* Add event to server's event queue */ |
| 478 | q = app->event_queue; |
| 479 | |
| 480 | /* Based on request block (or not) for lack of space */ |
| 481 | if (block || PREDICT_TRUE (q->cursize < q->maxsize)) |
| 482 | unix_shared_memory_queue_add (app->event_queue, (u8 *) & evt, |
| 483 | 0 /* do wait for mutex */ ); |
| 484 | else |
| 485 | { |
| 486 | clib_warning ("fifo full"); |
| 487 | return -1; |
| 488 | } |
| 489 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 490 | |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 491 | /* *INDENT-OFF* */ |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 492 | SESSION_EVT_DBG(SESSION_EVT_ENQ, s, ({ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 493 | ed->data[0] = evt.event_id; |
Florin Coras | 6792ec0 | 2017-03-13 03:49:51 -0700 | [diff] [blame] | 494 | ed->data[1] = svm_fifo_max_dequeue (s->server_rx_fifo); |
Florin Coras | e69f495 | 2017-03-07 10:06:24 -0800 | [diff] [blame] | 495 | })); |
| 496 | /* *INDENT-ON* */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 497 | |
| 498 | return 0; |
| 499 | } |
| 500 | |
| 501 | /** |
| 502 | * Flushes queue of sessions that are to be notified of new data |
| 503 | * enqueued events. |
| 504 | * |
| 505 | * @param thread_index Thread index for which the flush is to be performed. |
| 506 | * @return 0 on success or a positive number indicating the number of |
| 507 | * failures due to API queue being full. |
| 508 | */ |
| 509 | int |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 510 | session_manager_flush_enqueue_events (u8 transport_proto, u32 thread_index) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 511 | { |
| 512 | session_manager_main_t *smm = &session_manager_main; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 513 | u32 *indices; |
| 514 | stream_session_t *s; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 515 | int i, errors = 0; |
| 516 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 517 | indices = smm->session_to_enqueue[transport_proto][thread_index]; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 518 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 519 | for (i = 0; i < vec_len (indices); i++) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 520 | { |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 521 | s = session_get_if_valid (indices[i], thread_index); |
| 522 | if (s == 0 || session_enqueue_notify (s, 0 /* don't block */ )) |
| 523 | errors++; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 524 | } |
| 525 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 526 | vec_reset_length (indices); |
| 527 | smm->session_to_enqueue[transport_proto][thread_index] = indices; |
| 528 | smm->current_enqueue_epoch[transport_proto][thread_index]++; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 529 | |
| 530 | return errors; |
| 531 | } |
| 532 | |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 533 | /** |
| 534 | * Init fifo tail and head pointers |
| 535 | * |
| 536 | * Useful if transport uses absolute offsets for tracking ooo segments. |
| 537 | */ |
| 538 | void |
| 539 | stream_session_init_fifos_pointers (transport_connection_t * tc, |
| 540 | u32 rx_pointer, u32 tx_pointer) |
| 541 | { |
| 542 | stream_session_t *s; |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 543 | s = session_get (tc->s_index, tc->thread_index); |
Florin Coras | c28764f | 2017-04-26 00:08:42 -0700 | [diff] [blame] | 544 | svm_fifo_init_pointers (s->server_rx_fifo, rx_pointer); |
| 545 | svm_fifo_init_pointers (s->server_tx_fifo, tx_pointer); |
| 546 | } |
| 547 | |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 548 | int |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 549 | session_stream_connect_notify (transport_connection_t * tc, u8 is_fail) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 550 | { |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 551 | application_t *app; |
| 552 | stream_session_t *new_s = 0; |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 553 | u64 handle; |
Florin Coras | ab0289a | 2017-08-14 11:25:25 -0700 | [diff] [blame] | 554 | u32 opaque = 0; |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 555 | int error = 0; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 556 | segment_manager_t *sm; |
| 557 | u8 alloc_fifos; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 558 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 559 | /* |
| 560 | * Find connection handle and cleanup half-open table |
| 561 | */ |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 562 | handle = session_lookup_half_open_handle (tc); |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 563 | if (handle == HALF_OPEN_LOOKUP_INVALID_VALUE) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 564 | { |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 565 | SESSION_DBG ("half-open was removed!"); |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 566 | return -1; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 567 | } |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 568 | session_lookup_del_half_open (tc); |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 569 | |
Florin Coras | ab0289a | 2017-08-14 11:25:25 -0700 | [diff] [blame] | 570 | /* Get the app's index from the handle we stored when opening connection |
| 571 | * and the opaque (api_context for external apps) from transport session |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 572 | * index */ |
Florin Coras | c87c91d | 2017-08-16 19:55:49 -0700 | [diff] [blame] | 573 | app = application_get_if_valid (handle >> 32); |
| 574 | if (!app) |
| 575 | return -1; |
Florin Coras | ab0289a | 2017-08-14 11:25:25 -0700 | [diff] [blame] | 576 | opaque = tc->s_index; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 577 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 578 | /* |
| 579 | * Allocate new session with fifos (svm segments are allocated if needed) |
| 580 | */ |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 581 | if (!is_fail) |
| 582 | { |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 583 | sm = application_get_connect_segment_manager (app); |
Dave Barach | 52851e6 | 2017-08-07 09:35:25 -0400 | [diff] [blame] | 584 | alloc_fifos = application_is_proxy (app); |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 585 | if (session_alloc_and_init (sm, tc, alloc_fifos, &new_s)) |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 586 | { |
| 587 | is_fail = 1; |
| 588 | error = -1; |
| 589 | } |
| 590 | else |
| 591 | new_s->app_index = app->index; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 592 | } |
| 593 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 594 | /* |
| 595 | * Notify client application |
| 596 | */ |
Florin Coras | ab0289a | 2017-08-14 11:25:25 -0700 | [diff] [blame] | 597 | if (app->cb_fns.session_connected_callback (app->index, opaque, new_s, |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 598 | is_fail)) |
| 599 | { |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 600 | SESSION_DBG ("failed to notify app"); |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 601 | if (!is_fail) |
| 602 | stream_session_disconnect (new_s); |
| 603 | } |
| 604 | else |
| 605 | { |
| 606 | if (!is_fail) |
| 607 | new_s->session_state = SESSION_STATE_READY; |
| 608 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 609 | |
Florin Coras | f03a59a | 2017-06-09 21:07:32 -0700 | [diff] [blame] | 610 | return error; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 611 | } |
| 612 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 613 | typedef struct _session_switch_pool_args |
| 614 | { |
| 615 | u32 session_index; |
| 616 | u32 thread_index; |
| 617 | u32 new_thread_index; |
| 618 | u32 new_session_index; |
| 619 | } session_switch_pool_args_t; |
| 620 | |
| 621 | static void |
| 622 | session_switch_pool (void *cb_args) |
| 623 | { |
| 624 | session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args; |
| 625 | stream_session_t *s; |
| 626 | ASSERT (args->thread_index == vlib_get_thread_index ()); |
| 627 | s = session_get (args->session_index, args->thread_index); |
| 628 | s->server_tx_fifo->master_session_index = args->new_session_index; |
| 629 | s->server_tx_fifo->master_thread_index = args->new_thread_index; |
| 630 | tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index); |
| 631 | session_free (s); |
| 632 | clib_mem_free (cb_args); |
| 633 | } |
| 634 | |
| 635 | /** |
| 636 | * Move dgram session to the right thread |
| 637 | */ |
| 638 | int |
| 639 | session_dgram_connect_notify (transport_connection_t * tc, |
| 640 | u32 old_thread_index, |
| 641 | stream_session_t ** new_session) |
| 642 | { |
| 643 | stream_session_t *new_s; |
| 644 | session_switch_pool_args_t *rpc_args; |
| 645 | |
| 646 | /* |
| 647 | * Clone half-open session to the right thread. |
| 648 | */ |
| 649 | new_s = session_clone_safe (tc->s_index, old_thread_index); |
| 650 | new_s->connection_index = tc->c_index; |
| 651 | new_s->server_rx_fifo->master_session_index = new_s->session_index; |
| 652 | new_s->server_rx_fifo->master_thread_index = new_s->thread_index; |
| 653 | new_s->session_state = SESSION_STATE_READY; |
| 654 | session_lookup_add_connection (tc, session_handle (new_s)); |
| 655 | |
| 656 | /* |
| 657 | * Ask thread owning the old session to clean it up and make us the tx |
| 658 | * fifo owner |
| 659 | */ |
| 660 | rpc_args = clib_mem_alloc (sizeof (*rpc_args)); |
| 661 | rpc_args->new_session_index = new_s->session_index; |
| 662 | rpc_args->new_thread_index = new_s->thread_index; |
| 663 | rpc_args->session_index = tc->s_index; |
| 664 | rpc_args->thread_index = old_thread_index; |
| 665 | session_send_rpc_evt_to_thread (rpc_args->thread_index, session_switch_pool, |
| 666 | rpc_args); |
| 667 | |
| 668 | tc->s_index = new_s->session_index; |
| 669 | new_s->connection_index = tc->c_index; |
| 670 | *new_session = new_s; |
| 671 | return 0; |
| 672 | } |
| 673 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 674 | void |
| 675 | stream_session_accept_notify (transport_connection_t * tc) |
| 676 | { |
| 677 | application_t *server; |
| 678 | stream_session_t *s; |
| 679 | |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 680 | s = session_get (tc->s_index, tc->thread_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 681 | server = application_get (s->app_index); |
| 682 | server->cb_fns.session_accept_callback (s); |
| 683 | } |
| 684 | |
| 685 | /** |
| 686 | * Notification from transport that connection is being closed. |
| 687 | * |
| 688 | * A disconnect is sent to application but state is not removed. Once |
| 689 | * disconnect is acknowledged by application, session disconnect is called. |
| 690 | * Ultimately this leads to close being called on transport (passive close). |
| 691 | */ |
| 692 | void |
| 693 | stream_session_disconnect_notify (transport_connection_t * tc) |
| 694 | { |
| 695 | application_t *server; |
| 696 | stream_session_t *s; |
| 697 | |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 698 | s = session_get (tc->s_index, tc->thread_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 699 | server = application_get (s->app_index); |
| 700 | server->cb_fns.session_disconnect_callback (s); |
| 701 | } |
| 702 | |
| 703 | /** |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 704 | * Cleans up session and lookup table. |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 705 | */ |
| 706 | void |
| 707 | stream_session_delete (stream_session_t * s) |
| 708 | { |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 709 | int rv; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 710 | |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 711 | /* Delete from the main lookup table. */ |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 712 | if ((rv = session_lookup_del_session (s))) |
Florin Coras | 6534b7a | 2017-07-18 05:38:03 -0400 | [diff] [blame] | 713 | clib_warning ("hash delete error, rv %d", rv); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 714 | |
| 715 | /* Cleanup fifo segments */ |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 716 | segment_manager_dealloc_fifos (s->svm_segment_index, s->server_rx_fifo, |
| 717 | s->server_tx_fifo); |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 718 | session_free (s); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 719 | } |
| 720 | |
| 721 | /** |
| 722 | * Notification from transport that connection is being deleted |
| 723 | * |
Florin Coras | 4eeeaaf | 2017-09-05 14:03:37 -0400 | [diff] [blame] | 724 | * This removes the session if it is still valid. It should be called only on |
| 725 | * previously fully established sessions. For instance failed connects should |
| 726 | * call stream_session_connect_notify and indicate that the connect has |
| 727 | * failed. |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 728 | */ |
| 729 | void |
| 730 | stream_session_delete_notify (transport_connection_t * tc) |
| 731 | { |
| 732 | stream_session_t *s; |
| 733 | |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 734 | /* App might've been removed already */ |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 735 | s = session_get_if_valid (tc->s_index, tc->thread_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 736 | if (!s) |
Florin Coras | c87c91d | 2017-08-16 19:55:49 -0700 | [diff] [blame] | 737 | return; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 738 | stream_session_delete (s); |
| 739 | } |
| 740 | |
| 741 | /** |
| 742 | * Notify application that connection has been reset. |
| 743 | */ |
| 744 | void |
| 745 | stream_session_reset_notify (transport_connection_t * tc) |
| 746 | { |
| 747 | stream_session_t *s; |
| 748 | application_t *app; |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 749 | s = session_get (tc->s_index, tc->thread_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 750 | |
| 751 | app = application_get (s->app_index); |
| 752 | app->cb_fns.session_reset_callback (s); |
| 753 | } |
| 754 | |
| 755 | /** |
| 756 | * Accept a stream session. Optionally ping the server by callback. |
| 757 | */ |
| 758 | int |
| 759 | stream_session_accept (transport_connection_t * tc, u32 listener_index, |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 760 | u8 notify) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 761 | { |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 762 | application_t *server; |
| 763 | stream_session_t *s, *listener; |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 764 | segment_manager_t *sm; |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 765 | session_type_t sst; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 766 | int rv; |
| 767 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 768 | sst = session_type_from_proto_and_ip (tc->proto, tc->is_ip4); |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 769 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 770 | /* Find the server */ |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 771 | listener = listen_session_get (sst, listener_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 772 | server = application_get (listener->app_index); |
| 773 | |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 774 | sm = application_get_listen_segment_manager (server, listener); |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 775 | if ((rv = session_alloc_and_init (sm, tc, 1, &s))) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 776 | return rv; |
| 777 | |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 778 | s->app_index = server->index; |
| 779 | s->listener_index = listener_index; |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 780 | s->session_state = SESSION_STATE_ACCEPTING; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 781 | |
| 782 | /* Shoulder-tap the server */ |
| 783 | if (notify) |
| 784 | { |
| 785 | server->cb_fns.session_accept_callback (s); |
| 786 | } |
| 787 | |
| 788 | return 0; |
| 789 | } |
| 790 | |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 791 | /** |
| 792 | * Ask transport to open connection to remote transport endpoint. |
| 793 | * |
| 794 | * Stores handle for matching request with reply since the call can be |
| 795 | * asynchronous. For instance, for TCP the 3-way handshake must complete |
| 796 | * before reply comes. Session is only created once connection is established. |
| 797 | * |
| 798 | * @param app_index Index of the application requesting the connect |
| 799 | * @param st Session type requested. |
| 800 | * @param tep Remote transport endpoint |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 801 | * @param opaque Opaque data (typically, api_context) the application expects |
| 802 | * on open completion. |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 803 | */ |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 804 | int |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 805 | session_open (u32 app_index, session_endpoint_t * rmt, u32 opaque) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 806 | { |
| 807 | transport_connection_t *tc; |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 808 | session_type_t sst; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 809 | segment_manager_t *sm; |
| 810 | stream_session_t *s; |
| 811 | application_t *app; |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 812 | int rv; |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 813 | u64 handle; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 814 | |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 815 | sst = session_type_from_proto_and_ip (rmt->transport_proto, rmt->is_ip4); |
| 816 | rv = tp_vfts[sst].open (session_endpoint_to_transport (rmt)); |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 817 | if (rv < 0) |
| 818 | { |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 819 | SESSION_DBG ("Transport failed to open connection."); |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 820 | return VNET_API_ERROR_SESSION_CONNECT; |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 821 | } |
| 822 | |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 823 | tc = tp_vfts[sst].get_half_open ((u32) rv); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 824 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 825 | /* If transport offers a stream service, only allocate session once the |
| 826 | * connection has been established. |
| 827 | */ |
| 828 | if (transport_is_stream (rmt->transport_proto)) |
| 829 | { |
| 830 | /* Add connection to half-open table and save app and tc index. The |
| 831 | * latter is needed to help establish the connection while the former |
| 832 | * is needed when the connect notify comes and we have to notify the |
| 833 | * external app |
| 834 | */ |
| 835 | handle = (((u64) app_index) << 32) | (u64) tc->c_index; |
| 836 | session_lookup_add_half_open (tc, handle); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 837 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 838 | /* Store api_context (opaque) for when the reply comes. Not the nicest |
| 839 | * thing but better than allocating a separate half-open pool. |
| 840 | */ |
| 841 | tc->s_index = opaque; |
| 842 | } |
| 843 | /* For dgram type of service, allocate session and fifos now. |
| 844 | */ |
| 845 | else |
| 846 | { |
| 847 | app = application_get (app_index); |
| 848 | sm = application_get_connect_segment_manager (app); |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 849 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 850 | if (session_alloc_and_init (sm, tc, 1, &s)) |
| 851 | return -1; |
| 852 | s->app_index = app->index; |
| 853 | s->session_state = SESSION_STATE_CONNECTING_READY; |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 854 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 855 | /* Tell the app about the new event fifo for this session */ |
| 856 | app->cb_fns.session_connected_callback (app->index, opaque, s, 0); |
| 857 | } |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 858 | return 0; |
| 859 | } |
| 860 | |
| 861 | /** |
| 862 | * Ask transport to listen on local transport endpoint. |
| 863 | * |
| 864 | * @param s Session for which listen will be called. Note that unlike |
| 865 | * established sessions, listen sessions are not associated to a |
| 866 | * thread. |
| 867 | * @param tep Local endpoint to be listened on. |
| 868 | */ |
| 869 | int |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 870 | stream_session_listen (stream_session_t * s, session_endpoint_t * sep) |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 871 | { |
| 872 | transport_connection_t *tc; |
| 873 | u32 tci; |
| 874 | |
| 875 | /* Transport bind/listen */ |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 876 | tci = tp_vfts[s->session_type].bind (s->session_index, |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 877 | session_endpoint_to_transport (sep)); |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 878 | |
| 879 | if (tci == (u32) ~ 0) |
| 880 | return -1; |
| 881 | |
| 882 | /* Attach transport to session */ |
| 883 | s->connection_index = tci; |
| 884 | tc = tp_vfts[s->session_type].get_listener (tci); |
| 885 | |
| 886 | /* Weird but handle it ... */ |
| 887 | if (tc == 0) |
| 888 | return -1; |
| 889 | |
| 890 | /* Add to the main lookup table */ |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 891 | session_lookup_add_connection (tc, s->session_index); |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 892 | return 0; |
| 893 | } |
| 894 | |
| 895 | /** |
| 896 | * Ask transport to stop listening on local transport endpoint. |
| 897 | * |
| 898 | * @param s Session to stop listening on. It must be in state LISTENING. |
| 899 | */ |
| 900 | int |
| 901 | stream_session_stop_listen (stream_session_t * s) |
| 902 | { |
| 903 | transport_connection_t *tc; |
| 904 | |
| 905 | if (s->session_state != SESSION_STATE_LISTENING) |
| 906 | { |
| 907 | clib_warning ("not a listening session"); |
| 908 | return -1; |
| 909 | } |
| 910 | |
| 911 | tc = tp_vfts[s->session_type].get_listener (s->connection_index); |
| 912 | if (!tc) |
| 913 | { |
| 914 | clib_warning ("no transport"); |
| 915 | return VNET_API_ERROR_ADDRESS_NOT_IN_USE; |
| 916 | } |
| 917 | |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 918 | session_lookup_del_connection (tc); |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 919 | tp_vfts[s->session_type].unbind (s->connection_index); |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 920 | return 0; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 921 | } |
| 922 | |
| 923 | /** |
| 924 | * Disconnect session and propagate to transport. This should eventually |
| 925 | * result in a delete notification that allows us to cleanup session state. |
| 926 | * Called for both active/passive disconnects. |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 927 | * |
| 928 | * Should be called from the session's thread. |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 929 | */ |
| 930 | void |
| 931 | stream_session_disconnect (stream_session_t * s) |
| 932 | { |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 933 | s->session_state = SESSION_STATE_CLOSED; |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 934 | tp_vfts[s->session_type].close (s->connection_index, s->thread_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 935 | } |
| 936 | |
| 937 | /** |
| 938 | * Cleanup transport and session state. |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 939 | * |
| 940 | * Notify transport of the cleanup, wait for a delete notify to actually |
| 941 | * remove the session state. |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 942 | */ |
| 943 | void |
| 944 | stream_session_cleanup (stream_session_t * s) |
| 945 | { |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 946 | int rv; |
| 947 | |
| 948 | s->session_state = SESSION_STATE_CLOSED; |
| 949 | |
| 950 | /* Delete from the main lookup table to avoid more enqueues */ |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 951 | rv = session_lookup_del_session (s); |
Florin Coras | d79b41e | 2017-03-04 05:37:52 -0800 | [diff] [blame] | 952 | if (rv) |
| 953 | clib_warning ("hash delete error, rv %d", rv); |
| 954 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 955 | tp_vfts[s->session_type].cleanup (s->connection_index, s->thread_index); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 956 | } |
| 957 | |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 958 | /** |
| 959 | * Allocate vpp event queue (once) per worker thread |
| 960 | */ |
| 961 | void |
| 962 | session_vpp_event_queue_allocate (session_manager_main_t * smm, |
| 963 | u32 thread_index) |
| 964 | { |
| 965 | api_main_t *am = &api_main; |
| 966 | void *oldheap; |
Dave Barach | 10d8cc6 | 2017-05-30 09:30:07 -0400 | [diff] [blame] | 967 | u32 event_queue_length = 2048; |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 968 | |
| 969 | if (smm->vpp_event_queues[thread_index] == 0) |
| 970 | { |
| 971 | /* Allocate event fifo in the /vpe-api shared-memory segment */ |
| 972 | oldheap = svm_push_data_heap (am->vlib_rp); |
| 973 | |
Dave Barach | 10d8cc6 | 2017-05-30 09:30:07 -0400 | [diff] [blame] | 974 | if (smm->configured_event_queue_length) |
| 975 | event_queue_length = smm->configured_event_queue_length; |
| 976 | |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 977 | smm->vpp_event_queues[thread_index] = |
Dave Barach | 10d8cc6 | 2017-05-30 09:30:07 -0400 | [diff] [blame] | 978 | unix_shared_memory_queue_init |
| 979 | (event_queue_length, |
| 980 | sizeof (session_fifo_event_t), 0 /* consumer pid */ , |
| 981 | 0 /* (do not) send signal when queue non-empty */ ); |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 982 | |
| 983 | svm_pop_heap (oldheap); |
| 984 | } |
| 985 | } |
| 986 | |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 987 | session_type_t |
| 988 | session_type_from_proto_and_ip (transport_proto_t proto, u8 is_ip4) |
| 989 | { |
| 990 | if (proto == TRANSPORT_PROTO_TCP) |
| 991 | { |
| 992 | if (is_ip4) |
| 993 | return SESSION_TYPE_IP4_TCP; |
| 994 | else |
| 995 | return SESSION_TYPE_IP6_TCP; |
| 996 | } |
| 997 | else |
| 998 | { |
| 999 | if (is_ip4) |
| 1000 | return SESSION_TYPE_IP4_UDP; |
| 1001 | else |
| 1002 | return SESSION_TYPE_IP6_UDP; |
| 1003 | } |
| 1004 | |
| 1005 | return SESSION_N_TYPES; |
| 1006 | } |
| 1007 | |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 1008 | transport_connection_t * |
| 1009 | session_get_transport (stream_session_t * s) |
| 1010 | { |
| 1011 | if (s->session_state >= SESSION_STATE_READY) |
| 1012 | return tp_vfts[s->session_type].get_connection (s->connection_index, |
| 1013 | s->thread_index); |
| 1014 | return 0; |
| 1015 | } |
| 1016 | |
| 1017 | transport_connection_t * |
| 1018 | listen_session_get_transport (stream_session_t * s) |
| 1019 | { |
| 1020 | return tp_vfts[s->session_type].get_listener (s->connection_index); |
| 1021 | } |
| 1022 | |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 1023 | int |
| 1024 | listen_session_get_local_session_endpoint (stream_session_t * listener, |
| 1025 | session_endpoint_t * sep) |
| 1026 | { |
| 1027 | transport_connection_t *tc; |
| 1028 | tc = |
| 1029 | tp_vfts[listener->session_type].get_listener (listener->connection_index); |
| 1030 | if (!tc) |
| 1031 | { |
| 1032 | clib_warning ("no transport"); |
| 1033 | return -1; |
| 1034 | } |
| 1035 | |
| 1036 | /* N.B. The ip should not be copied because this is the local endpoint */ |
| 1037 | sep->port = tc->lcl_port; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 1038 | sep->transport_proto = tc->proto; |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 1039 | sep->is_ip4 = tc->is_ip4; |
| 1040 | return 0; |
| 1041 | } |
| 1042 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1043 | static clib_error_t * |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 1044 | session_manager_main_enable (vlib_main_t * vm) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1045 | { |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1046 | session_manager_main_t *smm = &session_manager_main; |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 1047 | vlib_thread_main_t *vtm = vlib_get_thread_main (); |
| 1048 | u32 num_threads; |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1049 | u32 preallocated_sessions_per_worker; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 1050 | int i, j; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1051 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1052 | num_threads = 1 /* main thread */ + vtm->n_threads; |
| 1053 | |
| 1054 | if (num_threads < 1) |
| 1055 | return clib_error_return (0, "n_thread_stacks not set"); |
| 1056 | |
| 1057 | /* $$$ config parameters */ |
| 1058 | svm_fifo_segment_init (0x200000000ULL /* first segment base VA */ , |
| 1059 | 20 /* timeout in seconds */ ); |
| 1060 | |
| 1061 | /* configure per-thread ** vectors */ |
| 1062 | vec_validate (smm->sessions, num_threads - 1); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1063 | vec_validate (smm->tx_buffers, num_threads - 1); |
Dave Barach | acd2a6a | 2017-05-16 17:41:34 -0400 | [diff] [blame] | 1064 | vec_validate (smm->pending_event_vector, num_threads - 1); |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 1065 | vec_validate (smm->pending_disconnects, num_threads - 1); |
Dave Barach | acd2a6a | 2017-05-16 17:41:34 -0400 | [diff] [blame] | 1066 | vec_validate (smm->free_event_vector, num_threads - 1); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1067 | vec_validate (smm->vpp_event_queues, num_threads - 1); |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 1068 | vec_validate (smm->session_peekers, num_threads - 1); |
| 1069 | vec_validate (smm->peekers_readers_locks, num_threads - 1); |
| 1070 | vec_validate (smm->peekers_write_locks, num_threads - 1); |
| 1071 | |
| 1072 | for (i = 0; i < TRANSPORT_N_PROTO; i++) |
| 1073 | for (j = 0; j < num_threads; j++) |
| 1074 | { |
| 1075 | vec_validate (smm->session_to_enqueue[i], num_threads - 1); |
| 1076 | vec_validate (smm->current_enqueue_epoch[i], num_threads - 1); |
| 1077 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1078 | |
Dave Barach | acd2a6a | 2017-05-16 17:41:34 -0400 | [diff] [blame] | 1079 | for (i = 0; i < num_threads; i++) |
| 1080 | { |
| 1081 | vec_validate (smm->free_event_vector[i], 0); |
| 1082 | _vec_len (smm->free_event_vector[i]) = 0; |
| 1083 | vec_validate (smm->pending_event_vector[i], 0); |
| 1084 | _vec_len (smm->pending_event_vector[i]) = 0; |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 1085 | vec_validate (smm->pending_disconnects[i], 0); |
| 1086 | _vec_len (smm->pending_disconnects[i]) = 0; |
Dave Barach | acd2a6a | 2017-05-16 17:41:34 -0400 | [diff] [blame] | 1087 | } |
| 1088 | |
Florin Coras | 3e350af | 2017-03-30 02:54:28 -0700 | [diff] [blame] | 1089 | #if SESSION_DBG |
| 1090 | vec_validate (smm->last_event_poll_by_thread, num_threads - 1); |
| 1091 | #endif |
| 1092 | |
Florin Coras | 6cf30ad | 2017-04-04 23:08:23 -0700 | [diff] [blame] | 1093 | /* Allocate vpp event queues */ |
| 1094 | for (i = 0; i < vec_len (smm->vpp_event_queues); i++) |
| 1095 | session_vpp_event_queue_allocate (smm, i); |
| 1096 | |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1097 | /* Preallocate sessions */ |
Dave Barach | b7f1faa | 2017-08-29 11:43:37 -0400 | [diff] [blame] | 1098 | if (smm->preallocated_sessions) |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1099 | { |
Dave Barach | b7f1faa | 2017-08-29 11:43:37 -0400 | [diff] [blame] | 1100 | if (num_threads == 1) |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1101 | { |
Dave Barach | b7f1faa | 2017-08-29 11:43:37 -0400 | [diff] [blame] | 1102 | pool_init_fixed (smm->sessions[0], smm->preallocated_sessions); |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1103 | } |
Dave Barach | b7f1faa | 2017-08-29 11:43:37 -0400 | [diff] [blame] | 1104 | else |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1105 | { |
Dave Barach | b7f1faa | 2017-08-29 11:43:37 -0400 | [diff] [blame] | 1106 | int j; |
| 1107 | preallocated_sessions_per_worker = |
| 1108 | (1.1 * (f64) smm->preallocated_sessions / |
| 1109 | (f64) (num_threads - 1)); |
| 1110 | |
| 1111 | for (j = 1; j < num_threads; j++) |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1112 | { |
Dave Barach | b7f1faa | 2017-08-29 11:43:37 -0400 | [diff] [blame] | 1113 | pool_init_fixed (smm->sessions[j], |
| 1114 | preallocated_sessions_per_worker); |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1115 | } |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1116 | } |
| 1117 | } |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1118 | |
Florin Coras | 04e5344 | 2017-07-16 17:12:15 -0700 | [diff] [blame] | 1119 | session_lookup_init (); |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 1120 | app_namespaces_init (); |
Florin Coras | 3cbc04b | 2017-10-02 00:18:51 -0700 | [diff] [blame^] | 1121 | transport_init (); |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1122 | |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 1123 | smm->is_enabled = 1; |
| 1124 | |
Florin Coras | a0b34a7 | 2017-03-07 01:20:52 -0800 | [diff] [blame] | 1125 | /* Enable TCP transport */ |
| 1126 | vnet_tcp_enable_disable (vm, 1); |
| 1127 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1128 | return 0; |
| 1129 | } |
| 1130 | |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 1131 | void |
| 1132 | session_node_enable_disable (u8 is_en) |
| 1133 | { |
| 1134 | u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED; |
| 1135 | /* *INDENT-OFF* */ |
| 1136 | foreach_vlib_main (({ |
| 1137 | vlib_node_set_state (this_vlib_main, session_queue_node.index, |
| 1138 | state); |
| 1139 | })); |
| 1140 | /* *INDENT-ON* */ |
| 1141 | } |
| 1142 | |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 1143 | clib_error_t * |
| 1144 | vnet_session_enable_disable (vlib_main_t * vm, u8 is_en) |
| 1145 | { |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 1146 | clib_error_t *error = 0; |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 1147 | if (is_en) |
| 1148 | { |
| 1149 | if (session_manager_main.is_enabled) |
| 1150 | return 0; |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1151 | |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 1152 | session_node_enable_disable (is_en); |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 1153 | error = session_manager_main_enable (vm); |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 1154 | } |
| 1155 | else |
| 1156 | { |
| 1157 | session_manager_main.is_enabled = 0; |
Florin Coras | a546481 | 2017-04-19 13:00:05 -0700 | [diff] [blame] | 1158 | session_node_enable_disable (is_en); |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 1159 | } |
| 1160 | |
Florin Coras | cea194d | 2017-10-02 00:18:51 -0700 | [diff] [blame] | 1161 | return error; |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 1162 | } |
| 1163 | |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 1164 | clib_error_t * |
| 1165 | session_manager_main_init (vlib_main_t * vm) |
| 1166 | { |
| 1167 | session_manager_main_t *smm = &session_manager_main; |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 1168 | smm->is_enabled = 0; |
Florin Coras | e04c299 | 2017-03-01 08:17:34 -0800 | [diff] [blame] | 1169 | return 0; |
| 1170 | } |
| 1171 | |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 1172 | VLIB_INIT_FUNCTION (session_manager_main_init); |
| 1173 | |
| 1174 | static clib_error_t * |
| 1175 | session_config_fn (vlib_main_t * vm, unformat_input_t * input) |
Dave Barach | 10d8cc6 | 2017-05-30 09:30:07 -0400 | [diff] [blame] | 1176 | { |
| 1177 | session_manager_main_t *smm = &session_manager_main; |
| 1178 | u32 nitems; |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1179 | uword tmp; |
Dave Barach | 10d8cc6 | 2017-05-30 09:30:07 -0400 | [diff] [blame] | 1180 | |
| 1181 | while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| 1182 | { |
| 1183 | if (unformat (input, "event-queue-length %d", &nitems)) |
| 1184 | { |
| 1185 | if (nitems >= 2048) |
| 1186 | smm->configured_event_queue_length = nitems; |
| 1187 | else |
| 1188 | clib_warning ("event queue length %d too small, ignored", nitems); |
| 1189 | } |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1190 | else if (unformat (input, "preallocated-sessions %d", |
| 1191 | &smm->preallocated_sessions)) |
Dave Barach | 2c25a62 | 2017-06-26 11:35:07 -0400 | [diff] [blame] | 1192 | ; |
Florin Coras | 66b1131 | 2017-07-31 17:18:03 -0700 | [diff] [blame] | 1193 | else if (unformat (input, "v4-session-table-buckets %d", |
| 1194 | &smm->configured_v4_session_table_buckets)) |
| 1195 | ; |
| 1196 | else if (unformat (input, "v4-halfopen-table-buckets %d", |
| 1197 | &smm->configured_v4_halfopen_table_buckets)) |
| 1198 | ; |
| 1199 | else if (unformat (input, "v6-session-table-buckets %d", |
| 1200 | &smm->configured_v6_session_table_buckets)) |
| 1201 | ; |
| 1202 | else if (unformat (input, "v6-halfopen-table-buckets %d", |
| 1203 | &smm->configured_v6_halfopen_table_buckets)) |
| 1204 | ; |
| 1205 | else if (unformat (input, "v4-session-table-memory %U", |
| 1206 | unformat_memory_size, &tmp)) |
| 1207 | { |
| 1208 | if (tmp >= 0x100000000) |
| 1209 | return clib_error_return (0, "memory size %llx (%lld) too large", |
| 1210 | tmp, tmp); |
| 1211 | smm->configured_v4_session_table_memory = tmp; |
| 1212 | } |
| 1213 | else if (unformat (input, "v4-halfopen-table-memory %U", |
| 1214 | unformat_memory_size, &tmp)) |
| 1215 | { |
| 1216 | if (tmp >= 0x100000000) |
| 1217 | return clib_error_return (0, "memory size %llx (%lld) too large", |
| 1218 | tmp, tmp); |
| 1219 | smm->configured_v4_halfopen_table_memory = tmp; |
| 1220 | } |
| 1221 | else if (unformat (input, "v6-session-table-memory %U", |
| 1222 | unformat_memory_size, &tmp)) |
| 1223 | { |
| 1224 | if (tmp >= 0x100000000) |
| 1225 | return clib_error_return (0, "memory size %llx (%lld) too large", |
| 1226 | tmp, tmp); |
| 1227 | smm->configured_v6_session_table_memory = tmp; |
| 1228 | } |
| 1229 | else if (unformat (input, "v6-halfopen-table-memory %U", |
| 1230 | unformat_memory_size, &tmp)) |
| 1231 | { |
| 1232 | if (tmp >= 0x100000000) |
| 1233 | return clib_error_return (0, "memory size %llx (%lld) too large", |
| 1234 | tmp, tmp); |
| 1235 | smm->configured_v6_halfopen_table_memory = tmp; |
| 1236 | } |
Dave Barach | 10d8cc6 | 2017-05-30 09:30:07 -0400 | [diff] [blame] | 1237 | else |
| 1238 | return clib_error_return (0, "unknown input `%U'", |
| 1239 | format_unformat_error, input); |
| 1240 | } |
| 1241 | return 0; |
| 1242 | } |
| 1243 | |
| 1244 | VLIB_CONFIG_FUNCTION (session_config_fn, "session"); |
| 1245 | |
Dave Barach | 68b0fb0 | 2017-02-28 15:15:56 -0500 | [diff] [blame] | 1246 | /* |
| 1247 | * fd.io coding-style-patch-verification: ON |
| 1248 | * |
| 1249 | * Local Variables: |
| 1250 | * eval: (c-set-style "gnu") |
| 1251 | * End: |
| 1252 | */ |