Add iACL IPv4/IPv6 tests. - csit

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author	Patrik Hrnciar <phrnciar@cisco.com>	2016-05-03 14:40:52 +0200
committer	Matej Klotton <mklotton@cisco.com>	2016-05-11 08:16:52 +0000
commit	452fabf532691f88b36b79bf2469afde18183de2 (patch)
tree	73c63417ee512ff73050559fae1ee93e99b4ad11 /resources/libraries/robot/traffic.robot
parent	807afe3f73ef9f6170e72f922338d0a726028ec6 (diff)

Add iACL IPv4/IPv6 tests.

- IPv4: CSIT-15 - IPv6: CSIT-16 Change-Id: I6e66aa853dfaebf1388f1191dbb63f5216820325 Signed-off-by: Patrik Hrnciar <phrnciar@cisco.com>

Diffstat (limited to 'resources/libraries/robot/traffic.robot')

-rw-r--r--

resources/libraries/robot/traffic.robot

1 files changed, 0 insertions, 1 deletions

/* * Copyright (c) 2017-2019 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** * @file * @brief Session and session manager */ #include <vnet/session/session.h> #include <vnet/session/session_debug.h> #include <vnet/session/application.h> #include <vnet/dpo/load_balance.h> #include <vnet/fib/ip4_fib.h> session_main_t session_main; static inline int session_send_evt_to_thread (void *data, void *args, u32 thread_index, session_evt_type_t evt_type) { session_event_t *evt; svm_msg_q_msg_t msg; svm_msg_q_t *mq; mq = session_main_get_vpp_event_queue (thread_index); if (PREDICT_FALSE (svm_msg_q_lock (mq))) return -1; if (PREDICT_FALSE (svm_msg_q_is_full (mq) || svm_msg_q_ring_is_full (mq, SESSION_MQ_IO_EVT_RING))) { svm_msg_q_unlock (mq); return -2; } switch (evt_type) { case SESSION_CTRL_EVT_RPC: msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING); evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg); evt->rpc_args.fp = data; evt->rpc_args.arg = args; break; case SESSION_IO_EVT_RX: case SESSION_IO_EVT_TX: case SESSION_IO_EVT_TX_FLUSH: case SESSION_IO_EVT_BUILTIN_RX: msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING); evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg); evt->session_index = *(u32 *) data; break; case SESSION_IO_EVT_BUILTIN_TX: case SESSION_CTRL_EVT_CLOSE: case SESSION_CTRL_EVT_RESET: msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING); evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg); evt->session_handle = session_handle ((session_t *) data); break; default: clib_warning ("evt unhandled!"); svm_msg_q_unlock (mq); return -1; } evt->event_type = evt_type; svm_msg_q_add_and_unlock (mq, &msg); return 0; } int session_send_io_evt_to_thread (svm_fifo_t * f, session_evt_type_t evt_type) { return session_send_evt_to_thread (&f->master_session_index, 0, f->master_thread_index, evt_type); } int session_send_io_evt_to_thread_custom (void *data, u32 thread_index, session_evt_type_t evt_type) { return session_send_evt_to_thread (data, 0, thread_index, evt_type); } int session_send_ctrl_evt_to_thread (session_t * s, session_evt_type_t evt_type) { /* only events supported are disconnect and reset */ ASSERT (evt_type == SESSION_CTRL_EVT_CLOSE || evt_type == SESSION_CTRL_EVT_RESET); return session_send_evt_to_thread (s, 0, s->thread_index, evt_type); } void session_send_rpc_evt_to_thread_force (u32 thread_index, void *fp, void *rpc_args) { session_send_evt_to_thread (fp, rpc_args, thread_index, SESSION_CTRL_EVT_RPC); } void session_send_rpc_evt_to_thread (u32 thread_index, void *fp, void *rpc_args) { if (thread_index != vlib_get_thread_index ()) session_send_rpc_evt_to_thread_force (thread_index, fp, rpc_args); else { void (*fnp) (void *) = fp; fnp (rpc_args); } } void session_add_self_custom_tx_evt (transport_connection_t * tc, u8 has_prio) { session_t *s; s = session_get (tc->s_index, tc->thread_index); ASSERT (s->thread_index == vlib_get_thread_index ()); ASSERT (s->session_state != SESSION_STATE_TRANSPORT_DELETED); if (!(s->flags & SESSION_F_CUSTOM_TX)) { s->flags |= SESSION_F_CUSTOM_TX; if (svm_fifo_set_event (s->tx_fifo)) { session_worker_t *wrk; session_evt_elt_t *elt; wrk = session_main_get_worker (tc->thread_index); if (has_prio) elt = session_evt_alloc_new (wrk); else elt = session_evt_alloc_old (wrk); elt->evt.session_index = tc->s_index; elt->evt.event_type = SESSION_IO_EVT_TX; } } } static void session_program_transport_ctrl_evt (session_t * s, session_evt_type_t evt) { u32 thread_index = vlib_get_thread_index (); session_evt_elt_t *elt; session_worker_t *wrk; /* If we are in the handler thread, or being called with the worker barrier * held, just append a new event to pending disconnects vector. */ if (vlib_thread_is_main_w_barrier () || thread_index == s->thread_index) { wrk = session_main_get_worker (s->thread_index); elt = session_evt_alloc_ctrl (wrk); clib_memset (&elt->evt, 0, sizeof (session_event_t)); elt->evt.session_handle = session_handle (s); elt->evt.event_type = evt; } else session_send_ctrl_evt_to_thread (s, evt); } session_t * session_alloc (u32 thread_index) { session_worker_t *wrk = &session_main.wrk[thread_index]; session_t *s; u8 will_expand = 0; pool_get_aligned_will_expand (wrk->sessions, will_expand, CLIB_CACHE_LINE_BYTES); /* If we have peekers, let them finish */ if (PREDICT_FALSE (will_expand && vlib_num_workers ())) { clib_rwlock_writer_lock (&wrk->peekers_rw_locks); pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES); clib_rwlock_writer_unlock (&wrk->peekers_rw_locks); } else { pool_get_aligned (wrk->sessions, s, CLIB_CACHE_LINE_BYTES); } clib_memset (s, 0, sizeof (*s)); s->session_index = s - wrk->sessions; s->thread_index = thread_index; s->app_index = APP_INVALID_INDEX; return s; } void session_free (session_t * s) { if (CLIB_DEBUG) { u8 thread_index = s->thread_index; clib_memset (s, 0xFA, sizeof (*s)); pool_put (session_main.wrk[thread_index].sessions, s); return; } SESSION_EVT (SESSION_EVT_FREE, s); pool_put (session_main.wrk[s->thread_index].sessions, s); } u8 session_is_valid (u32 si, u8 thread_index) { session_t *s; transport_connection_t *tc; s = pool_elt_at_index (session_main.wrk[thread_index].sessions, si); if (!s) return 1; if (s->thread_index != thread_index || s->session_index != si) return 0; if (s->session_state == SESSION_STATE_TRANSPORT_DELETED || s->session_state <= SESSION_STATE_LISTENING) return 1; tc = session_get_transport (s); if (s->connection_index != tc->c_index || s->thread_index != tc->thread_index || tc->s_index != si) return 0; return 1; } static void session_cleanup_notify (session_t * s, session_cleanup_ntf_t ntf) { app_worker_t *app_wrk; app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (!app_wrk) return; app_worker_cleanup_notify (app_wrk, s, ntf); } void session_free_w_fifos (session_t * s) { session_cleanup_notify (s, SESSION_CLEANUP_SESSION); segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo); session_free (s); } /** * Cleans up session and lookup table. * * Transport connection must still be valid. */ static void session_delete (session_t * s) { int rv; /* Delete from the main lookup table. */ if ((rv = session_lookup_del_session (s))) clib_warning ("session %u hash delete rv %d", s->session_index, rv); session_free_w_fifos (s); } static session_t * session_alloc_for_connection (transport_connection_t * tc) { session_t *s; u32 thread_index = tc->thread_index; ASSERT (thread_index == vlib_get_thread_index () || transport_protocol_is_cl (tc->proto)); s = session_alloc (thread_index); s->session_type = session_type_from_proto_and_ip (tc->proto, tc->is_ip4); s->session_state = SESSION_STATE_CLOSED; /* Attach transport to session and vice versa */ s->connection_index = tc->c_index; tc->s_index = s->session_index; return s; } /** * Discards bytes from buffer chain * * It discards n_bytes_to_drop starting at first buffer after chain_b */ always_inline void session_enqueue_discard_chain_bytes (vlib_main_t * vm, vlib_buffer_t * b, vlib_buffer_t ** chain_b, u32 n_bytes_to_drop) { vlib_buffer_t *next = *chain_b; u32 to_drop = n_bytes_to_drop; ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT); while (to_drop && (next->flags & VLIB_BUFFER_NEXT_PRESENT)) { next = vlib_get_buffer (vm, next->next_buffer); if (next->current_length > to_drop) { vlib_buffer_advance (next, to_drop); to_drop = 0; } else { to_drop -= next->current_length; next->current_length = 0; } } *chain_b = next; if (to_drop == 0) b->total_length_not_including_first_buffer -= n_bytes_to_drop; } /** * Enqueue buffer chain tail */ always_inline int session_enqueue_chain_tail (session_t * s, vlib_buffer_t * b, u32 offset, u8 is_in_order) { vlib_buffer_t *chain_b; u32 chain_bi, len, diff; vlib_main_t *vm = vlib_get_main (); u8 *data; u32 written = 0; int rv = 0; if (is_in_order && offset) { diff = offset - b->current_length; if (diff > b->total_length_not_including_first_buffer) return 0; chain_b = b; session_enqueue_discard_chain_bytes (vm, b, &chain_b, diff); chain_bi = vlib_get_buffer_index (vm, chain_b); } else chain_bi = b->next_buffer; do { chain_b = vlib_get_buffer (vm, chain_bi); data = vlib_buffer_get_current (chain_b); len = chain_b->current_length; if (!len) continue; if (is_in_order) { rv = svm_fifo_enqueue (s->rx_fifo, len, data); if (rv == len) { written += rv; } else if (rv < len) { return (rv > 0) ? (written + rv) : written; } else if (rv > len) { written += rv; /* written more than what was left in chain */ if (written > b->total_length_not_including_first_buffer) return written; /* drop the bytes that have already been delivered */ session_enqueue_discard_chain_bytes (vm, b, &chain_b, rv - len); } } else { rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset, len, data); if (rv) { clib_warning ("failed to enqueue multi-buffer seg"); return -1; } offset += len; } } while ((chain_bi = (chain_b->flags & VLIB_BUFFER_NEXT_PRESENT) ? chain_b->next_buffer : 0)); if (is_in_order) return written; return 0; } /* * Enqueue data for delivery to session peer. Does not notify peer of enqueue * event but on request can queue notification events for later delivery by * calling stream_server_flush_enqueue_events(). * * @param tc Transport connection which is to be enqueued data * @param b Buffer to be enqueued * @param offset Offset at which to start enqueueing if out-of-order * @param queue_event Flag to indicate if peer is to be notified or if event * is to be queued. The former is useful when more data is * enqueued and only one event is to be generated. * @param is_in_order Flag to indicate if data is in order * @return Number of bytes enqueued or a negative value if enqueueing failed. */ int session_enqueue_stream_connection (transport_connection_t * tc, vlib_buffer_t * b, u32 offset, u8 queue_event, u8 is_in_order) { session_t *s; int enqueued = 0, rv, in_order_off; s = session_get (tc->s_index, tc->thread_index); if (is_in_order) { enqueued = svm_fifo_enqueue (s->rx_fifo, b->current_length, vlib_buffer_get_current (b)); if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0)) { in_order_off = enqueued > b->current_length ? enqueued : 0; rv = session_enqueue_chain_tail (s, b, in_order_off, 1); if (rv > 0) enqueued += rv; } } else { rv = svm_fifo_enqueue_with_offset (s->rx_fifo, offset, b->current_length, vlib_buffer_get_current (b)); if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && !rv)) session_enqueue_chain_tail (s, b, offset + b->current_length, 0); /* if something was enqueued, report even this as success for ooo * segment handling */ return rv; } if (queue_event) { /* Queue RX event on this fifo. Eventually these will need to be flushed * by calling stream_server_flush_enqueue_events () */ session_worker_t *wrk; wrk = session_main_get_worker (s->thread_index); if (!(s->flags & SESSION_F_RX_EVT)) { s->flags |= SESSION_F_RX_EVT; vec_add1 (wrk->session_to_enqueue[tc->proto], s->session_index); } } return enqueued; } int session_enqueue_dgram_connection (session_t * s, session_dgram_hdr_t * hdr, vlib_buffer_t * b, u8 proto, u8 queue_event) { int enqueued = 0, rv, in_order_off; ASSERT (svm_fifo_max_enqueue_prod (s->rx_fifo) >= b->current_length + sizeof (*hdr)); svm_fifo_enqueue (s->rx_fifo, sizeof (session_dgram_hdr_t), (u8 *) hdr); enqueued = svm_fifo_enqueue (s->rx_fifo, b->current_length, vlib_buffer_get_current (b)); if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) && enqueued >= 0)) { in_order_off = enqueued > b->current_length ? enqueued : 0; rv = session_enqueue_chain_tail (s, b, in_order_off, 1); if (rv > 0) enqueued += rv; } if (queue_event) { /* Queue RX event on this fifo. Eventually these will need to be flushed * by calling stream_server_flush_enqueue_events () */ session_worker_t *wrk; wrk = session_main_get_worker (s->thread_index); if (!(s->flags & SESSION_F_RX_EVT)) { s->flags |= SESSION_F_RX_EVT; vec_add1 (wrk->session_to_enqueue[proto], s->session_index); } } return enqueued; } int session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer, u32 offset, u32 max_bytes) { session_t *s = session_get (tc->s_index, tc->thread_index); return svm_fifo_peek (s->tx_fifo, offset, max_bytes, buffer); } u32 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes) { session_t *s = session_get (tc->s_index, tc->thread_index); u32 rv; rv = svm_fifo_dequeue_drop (s->tx_fifo, max_bytes); if (svm_fifo_needs_deq_ntf (s->tx_fifo, max_bytes)) session_dequeue_notify (s); return rv; } static inline int session_notify_subscribers (u32 app_index, session_t * s, svm_fifo_t * f, session_evt_type_t evt_type) { app_worker_t *app_wrk; application_t *app; int i; app = application_get (app_index); if (!app) return -1; for (i = 0; i < f->n_subscribers; i++) { app_wrk = application_get_worker (app, f->subscribers[i]); if (!app_wrk) continue; if (app_worker_lock_and_send_event (app_wrk, s, evt_type)) return -1; } return 0; } /** * Notify session peer that new data has been enqueued. * * @param s Stream session for which the event is to be generated. * @param lock Flag to indicate if call should lock message queue. * * @return 0 on success or negative number if failed to send notification. */ static inline int session_enqueue_notify_inline (session_t * s) { app_worker_t *app_wrk; u32 session_index; u8 n_subscribers; session_index = s->session_index; n_subscribers = svm_fifo_n_subscribers (s->rx_fifo); app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (PREDICT_FALSE (!app_wrk)) { SESSION_DBG ("invalid s->app_index = %d", s->app_wrk_index); return 0; } SESSION_EVT (SESSION_EVT_ENQ, s, svm_fifo_max_dequeue_prod (s->rx_fifo)); s->flags &= ~SESSION_F_RX_EVT; if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX))) return -1; if (PREDICT_FALSE (n_subscribers)) { s = session_get (session_index, vlib_get_thread_index ()); return session_notify_subscribers (app_wrk->app_index, s, s->rx_fifo, SESSION_IO_EVT_RX); } return 0; } int session_enqueue_notify (session_t * s) { return session_enqueue_notify_inline (s); } static void session_enqueue_notify_rpc (void *arg) { u32 session_index = pointer_to_uword (arg); session_t *s; s = session_get_if_valid (session_index, vlib_get_thread_index ()); if (!s) return; session_enqueue_notify (s); } /** * Like session_enqueue_notify, but can be called from a thread that does not * own the session. */ void session_enqueue_notify_thread (session_handle_t sh) { u32 thread_index = session_thread_from_handle (sh); u32 session_index = session_index_from_handle (sh); /* * Pass session index (u32) as opposed to handle (u64) in case pointers * are not 64-bit. */ session_send_rpc_evt_to_thread (thread_index, session_enqueue_notify_rpc, uword_to_pointer (session_index, void *)); } int session_dequeue_notify (session_t * s) { app_worker_t *app_wrk; svm_fifo_clear_deq_ntf (s->tx_fifo); app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (PREDICT_FALSE (!app_wrk)) return -1; if (PREDICT_FALSE (app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_TX))) return -1; if (PREDICT_FALSE (s->tx_fifo->n_subscribers)) return session_notify_subscribers (app_wrk->app_index, s, s->tx_fifo, SESSION_IO_EVT_TX); return 0; } /** * Flushes queue of sessions that are to be notified of new data * enqueued events. * * @param thread_index Thread index for which the flush is to be performed. * @return 0 on success or a positive number indicating the number of * failures due to API queue being full. */ int session_main_flush_enqueue_events (u8 transport_proto, u32 thread_index) { session_worker_t *wrk = session_main_get_worker (thread_index); session_t *s; int i, errors = 0; u32 *indices; indices = wrk->session_to_enqueue[transport_proto]; for (i = 0; i < vec_len (indices); i++) { s = session_get_if_valid (indices[i], thread_index); if (PREDICT_FALSE (!s)) { errors++; continue; } if (PREDICT_FALSE (session_enqueue_notify_inline (s))) errors++; } vec_reset_length (indices); wrk->session_to_enqueue[transport_proto] = indices; return errors; } int session_main_flush_all_enqueue_events (u8 transport_proto) { vlib_thread_main_t *vtm = vlib_get_thread_main (); int i, errors = 0; for (i = 0; i < 1 + vtm->n_threads; i++) errors += session_main_flush_enqueue_events (transport_proto, i); return errors; } static inline int session_stream_connect_notify_inline (transport_connection_t * tc, u8 is_fail, session_state_t opened_state) { u32 opaque = 0, new_ti, new_si; app_worker_t *app_wrk; session_t *s = 0; u64 ho_handle; /* * Find connection handle and cleanup half-open table */ ho_handle = session_lookup_half_open_handle (tc); if (ho_handle == HALF_OPEN_LOOKUP_INVALID_VALUE) { SESSION_DBG ("half-open was removed!"); return -1; } session_lookup_del_half_open (tc); /* Get the app's index from the handle we stored when opening connection * and the opaque (api_context for external apps) from transport session * index */ app_wrk = app_worker_get_if_valid (ho_handle >> 32); if (!app_wrk) return -1; opaque = tc->s_index; if (is_fail) return app_worker_connect_notify (app_wrk, s, opaque); s = session_alloc_for_connection (tc); s->session_state = SESSION_STATE_CONNECTING; s->app_wrk_index = app_wrk->wrk_index; new_si = s->session_index; new_ti = s->thread_index; if (app_worker_init_connected (app_wrk, s)) { session_free (s); app_worker_connect_notify (app_wrk, 0, opaque); return -1; } s = session_get (new_si, new_ti); s->session_state = opened_state; session_lookup_add_connection (tc, session_handle (s)); if (app_worker_connect_notify (app_wrk, s, opaque)) { s = session_get (new_si, new_ti); session_free_w_fifos (s); return -1; } return 0; } int session_stream_connect_notify (transport_connection_t * tc, u8 is_fail) { return session_stream_connect_notify_inline (tc, is_fail, SESSION_STATE_READY); } int session_ho_stream_connect_notify (transport_connection_t * tc, u8 is_fail) { return session_stream_connect_notify_inline (tc, is_fail, SESSION_STATE_OPENED); } typedef struct _session_switch_pool_args { u32 session_index; u32 thread_index; u32 new_thread_index; u32 new_session_index; } session_switch_pool_args_t; /** * Notify old thread of the session pool switch */ static void session_switch_pool (void *cb_args) { session_switch_pool_args_t *args = (session_switch_pool_args_t *) cb_args; app_worker_t *app_wrk; session_t *s; ASSERT (args->thread_index == vlib_get_thread_index ()); s = session_get (args->session_index, args->thread_index); s->tx_fifo->master_session_index = args->new_session_index; s->tx_fifo->master_thread_index = args->new_thread_index; transport_cleanup (session_get_transport_proto (s), s->connection_index, s->thread_index); app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (app_wrk) { session_handle_t new_sh; new_sh = session_make_handle (args->new_session_index, args->new_thread_index); app_worker_migrate_notify (app_wrk, s, new_sh); /* Trigger app read on the new thread */ session_enqueue_notify_thread (new_sh); } session_free (s); clib_mem_free (cb_args); } /** * Move dgram session to the right thread */ int session_dgram_connect_notify (transport_connection_t * tc, u32 old_thread_index, session_t ** new_session) { session_t *new_s; session_switch_pool_args_t *rpc_args; /* * Clone half-open session to the right thread. */ new_s = session_clone_safe (tc->s_index, old_thread_index); new_s->connection_index = tc->c_index; new_s->rx_fifo->master_session_index = new_s->session_index; new_s->rx_fifo->master_thread_index = new_s->thread_index; new_s->session_state = SESSION_STATE_READY; new_s->flags |= SESSION_F_IS_MIGRATING; session_lookup_add_connection (tc, session_handle (new_s)); /* * Ask thread owning the old session to clean it up and make us the tx * fifo owner */ rpc_args = clib_mem_alloc (sizeof (*rpc_args)); rpc_args->new_session_index = new_s->session_index; rpc_args->new_thread_index = new_s->thread_index; rpc_args->session_index = tc->s_index; rpc_args->thread_index = old_thread_index; session_send_rpc_evt_to_thread (rpc_args->thread_index, session_switch_pool, rpc_args); tc->s_index = new_s->session_index; new_s->connection_index = tc->c_index; *new_session = new_s; return 0; } /** * Notification from transport that connection is being closed. * * A disconnect is sent to application but state is not removed. Once * disconnect is acknowledged by application, session disconnect is called. * Ultimately this leads to close being called on transport (passive close). */ void session_transport_closing_notify (transport_connection_t * tc) { app_worker_t *app_wrk; session_t *s; s = session_get (tc->s_index, tc->thread_index); if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING) return; s->session_state = SESSION_STATE_TRANSPORT_CLOSING; app_wrk = app_worker_get (s->app_wrk_index); app_worker_close_notify (app_wrk, s); } /** * Notification from transport that connection is being deleted * * This removes the session if it is still valid. It should be called only on * previously fully established sessions. For instance failed connects should * call stream_session_connect_notify and indicate that the connect has * failed. */ void session_transport_delete_notify (transport_connection_t * tc) { session_t *s; /* App might've been removed already */ if (!(s = session_get_if_valid (tc->s_index, tc->thread_index))) return; switch (s->session_state) { case SESSION_STATE_CREATED: /* Session was created but accept notification was not yet sent to the * app. Cleanup everything. */ session_lookup_del_session (s); segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo); session_free (s); break; case SESSION_STATE_ACCEPTING: case SESSION_STATE_TRANSPORT_CLOSING: case SESSION_STATE_CLOSING: case SESSION_STATE_TRANSPORT_CLOSED: /* If transport finishes or times out before we get a reply * from the app, mark transport as closed and wait for reply * before removing the session. Cleanup session table in advance * because transport will soon be closed and closed sessions * are assumed to have been removed from the lookup table */ session_lookup_del_session (s); s->session_state = SESSION_STATE_TRANSPORT_DELETED; session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT); svm_fifo_dequeue_drop_all (s->tx_fifo); break; case SESSION_STATE_APP_CLOSED: /* Cleanup lookup table as transport needs to still be valid. * Program transport close to ensure that all session events * have been cleaned up. Once transport close is called, the * session is just removed because both transport and app have * confirmed the close*/ session_lookup_del_session (s); s->session_state = SESSION_STATE_TRANSPORT_DELETED; session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT); svm_fifo_dequeue_drop_all (s->tx_fifo); session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE); break; case SESSION_STATE_TRANSPORT_DELETED: break; case SESSION_STATE_CLOSED: session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT); session_delete (s); break; default: clib_warning ("session state %u", s->session_state); session_cleanup_notify (s, SESSION_CLEANUP_TRANSPORT); session_delete (s); break; } } /** * Notification from transport that it is closed * * Should be called by transport, prior to calling delete notify, once it * knows that no more data will be exchanged. This could serve as an * early acknowledgment of an active close especially if transport delete * can be delayed a long time, e.g., tcp time-wait. */ void session_transport_closed_notify (transport_connection_t * tc) { app_worker_t *app_wrk; session_t *s; if (!(s = session_get_if_valid (tc->s_index, tc->thread_index))) return; /* Transport thinks that app requested close but it actually didn't. * Can happen for tcp if fin and rst are received in close succession. */ if (s->session_state == SESSION_STATE_READY) { session_transport_closing_notify (tc); svm_fifo_dequeue_drop_all (s->tx_fifo); s->session_state = SESSION_STATE_TRANSPORT_CLOSED; } /* If app close has not been received or has not yet resulted in * a transport close, only mark the session transport as closed */ else if (s->session_state <= SESSION_STATE_CLOSING) { s->session_state = SESSION_STATE_TRANSPORT_CLOSED; } /* If app also closed, switch to closed */ else if (s->session_state == SESSION_STATE_APP_CLOSED) s->session_state = SESSION_STATE_CLOSED; app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (app_wrk) app_worker_transport_closed_notify (app_wrk, s); } /** * Notify application that connection has been reset. */ void session_transport_reset_notify (transport_connection_t * tc) { app_worker_t *app_wrk; session_t *s; s = session_get (tc->s_index, tc->thread_index); svm_fifo_dequeue_drop_all (s->tx_fifo); if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING) return; s->session_state = SESSION_STATE_TRANSPORT_CLOSING; app_wrk = app_worker_get (s->app_wrk_index); app_worker_reset_notify (app_wrk, s); } int session_stream_accept_notify (transport_connection_t * tc) { app_worker_t *app_wrk; session_t *s; s = session_get (tc->s_index, tc->thread_index); app_wrk = app_worker_get_if_valid (s->app_wrk_index); if (!app_wrk) return -1; s->session_state = SESSION_STATE_ACCEPTING; return app_worker_accept_notify (app_wrk, s); } /** * Accept a stream session. Optionally ping the server by callback. */ int session_stream_accept (transport_connection_t * tc, u32 listener_index, u32 thread_index, u8 notify) { session_t *s; int rv; s = session_alloc_for_connection (tc); s->listener_handle = ((u64) thread_index << 32) | (u64) listener_index; s->session_state = SESSION_STATE_CREATED; if ((rv = app_worker_init_accepted (s))) return rv; session_lookup_add_connection (tc, session_handle (s)); /* Shoulder-tap the server */ if (notify) { app_worker_t *app_wrk = app_worker_get (s->app_wrk_index); return app_worker_accept_notify (app_wrk, s); } return 0; } int session_open_cl (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque) { transport_connection_t *tc; transport_endpoint_cfg_t *tep; app_worker_t *app_wrk; session_handle_t sh; session_t *s; int rv; tep = session_endpoint_to_transport_cfg (rmt); rv = transport_connect (rmt->transport_proto, tep); if (rv < 0) { SESSION_DBG ("Transport failed to open connection."); return VNET_API_ERROR_SESSION_CONNECT; } tc = transport_get_half_open (rmt->transport_proto, (u32) rv); /* For dgram type of service, allocate session and fifos now */ app_wrk = app_worker_get (app_wrk_index); s = session_alloc_for_connection (tc); s->app_wrk_index = app_wrk->wrk_index; s->session_state = SESSION_STATE_OPENED; if (app_worker_init_connected (app_wrk, s)) { session_free (s); return -1; } sh = session_handle (s); session_lookup_add_connection (tc, sh); return app_worker_connect_notify (app_wrk, s, opaque); } int session_open_vc (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque) { transport_connection_t *tc; transport_endpoint_cfg_t *tep; u64 handle; int rv; tep = session_endpoint_to_transport_cfg (rmt); rv = transport_connect (rmt->transport_proto, tep); if (rv < 0) { SESSION_DBG ("Transport failed to open connection."); return VNET_API_ERROR_SESSION_CONNECT; } tc = transport_get_half_open (rmt->transport_proto, (u32) rv); /* If transport offers a stream service, only allocate session once the * connection has been established. * Add connection to half-open table and save app and tc index. The * latter is needed to help establish the connection while the former * is needed when the connect notify comes and we have to notify the * external app */ handle = (((u64) app_wrk_index) << 32) | (u64) tc->c_index; session_lookup_add_half_open (tc, handle); /* Store api_context (opaque) for when the reply comes. Not the nicest * thing but better than allocating a separate half-open pool. */ tc->s_index = opaque; if (transport_half_open_has_fifos (rmt->transport_proto)) return session_ho_stream_connect_notify (tc, 0 /* is_fail */ ); return 0; } int session_open_app (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque) { session_endpoint_cfg_t *sep = (session_endpoint_cfg_t *) rmt; transport_endpoint_cfg_t *tep_cfg = session_endpoint_to_transport_cfg (sep); sep->app_wrk_index = app_wrk_index; sep->opaque = opaque; return transport_connect (rmt->transport_proto, tep_cfg); } typedef int (*session_open_service_fn) (u32, session_endpoint_t *, u32); /* *INDENT-OFF* */ static session_open_service_fn session_open_srv_fns[TRANSPORT_N_SERVICES] = { session_open_vc, session_open_cl, session_open_app, }; /* *INDENT-ON* */ /** * Ask transport to open connection to remote transport endpoint. * * Stores handle for matching request with reply since the call can be * asynchronous. For instance, for TCP the 3-way handshake must complete * before reply comes. Session is only created once connection is established. * * @param app_index Index of the application requesting the connect * @param st Session type requested. * @param tep Remote transport endpoint * @param opaque Opaque data (typically, api_context) the application expects * on open completion. */ int session_open (u32 app_wrk_index, session_endpoint_t * rmt, u32 opaque) { transport_service_type_t tst; tst = transport_protocol_service_type (rmt->transport_proto); return session_open_srv_fns[tst] (app_wrk_index, rmt, opaque); } /** * Ask transport to listen on session endpoint. * * @param s Session for which listen will be called. Note that unlike * established sessions, listen sessions are not associated to a * thread. * @param sep Local endpoint to be listened on. */ int session_listen (session_t * ls, session_endpoint_cfg_t * sep) { transport_endpoint_t *tep; u32 tc_index, s_index; /* Transport bind/listen */ tep = session_endpoint_to_transport (sep); s_index = ls->session_index; tc_index = transport_start_listen (session_get_transport_proto (ls), s_index, tep); if (tc_index == (u32) ~ 0) return -1; /* Attach transport to session. Lookup tables are populated by the app * worker because local tables (for ct sessions) are not backed by a fib */ ls = listen_session_get (s_index); ls->connection_index = tc_index; return 0; } /** * Ask transport to stop listening on local transport endpoint. * * @param s Session to stop listening on. It must be in state LISTENING. */ int session_stop_listen (session_t * s) { transport_proto_t tp = session_get_transport_proto (s); transport_connection_t *tc; if (s->session_state != SESSION_STATE_LISTENING) return -1; tc = transport_get_listener (tp, s->connection_index); if (!tc) return VNET_API_ERROR_ADDRESS_NOT_IN_USE; if (!(tc->flags & TRANSPORT_CONNECTION_F_NO_LOOKUP)) session_lookup_del_connection (tc); transport_stop_listen (tp, s->connection_index); return 0; } /** * Initialize session closing procedure. * * Request is always sent to session node to ensure that all outstanding * requests are served before transport is notified. */ void session_close (session_t * s) { if (!s) return; if (s->session_state >= SESSION_STATE_CLOSING) { /* Session will only be removed once both app and transport * acknowledge the close */ if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED || s->session_state == SESSION_STATE_TRANSPORT_DELETED) session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE); return; } s->session_state = SESSION_STATE_CLOSING; session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_CLOSE); } /** * Force a close without waiting for data to be flushed */ void session_reset (session_t * s) { if (s->session_state >= SESSION_STATE_CLOSING) return; /* Drop all outstanding tx data */ svm_fifo_dequeue_drop_all (s->tx_fifo); s->session_state = SESSION_STATE_CLOSING; session_program_transport_ctrl_evt (s, SESSION_CTRL_EVT_RESET); } /** * Notify transport the session can be disconnected. This should eventually * result in a delete notification that allows us to cleanup session state. * Called for both active/passive disconnects. * * Must be called from the session's thread. */ void session_transport_close (session_t * s) { if (s->session_state >= SESSION_STATE_APP_CLOSED) { if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED) s->session_state = SESSION_STATE_CLOSED; /* If transport is already deleted, just free the session */ else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED) session_free_w_fifos (s); return; } /* If the tx queue wasn't drained, the transport can continue to try * sending the outstanding data (in closed state it cannot). It MUST however * at one point, either after sending everything or after a timeout, call * delete notify. This will finally lead to the complete cleanup of the * session. */ s->session_state = SESSION_STATE_APP_CLOSED; transport_close (session_get_transport_proto (s), s->connection_index, s->thread_index); } /** * Force transport close */ void session_transport_reset (session_t * s) { if (s->session_state >= SESSION_STATE_APP_CLOSED) { if (s->session_state == SESSION_STATE_TRANSPORT_CLOSED) s->session_state = SESSION_STATE_CLOSED; else if (s->session_state >= SESSION_STATE_TRANSPORT_DELETED) session_free_w_fifos (s); return; } s->session_state = SESSION_STATE_APP_CLOSED; transport_reset (session_get_transport_proto (s), s->connection_index, s->thread_index); } /** * Cleanup transport and session state. * * Notify transport of the cleanup and free the session. This should * be called only if transport reported some error and is already * closed. */ void session_transport_cleanup (session_t * s) { /* Delete from main lookup table before we axe the the transport */ session_lookup_del_session (s); if (s->session_state != SESSION_STATE_TRANSPORT_DELETED) transport_cleanup (session_get_transport_proto (s), s->connection_index, s->thread_index); /* Since we called cleanup, no delete notification will come. So, make * sure the session is properly freed. */ segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo); session_free (s); } /** * Allocate event queues in the shared-memory segment * * That can either be a newly created memfd segment, that will need to be * mapped by all stack users, or the binary api's svm region. The latter is * assumed to be already mapped. NOTE that this assumption DOES NOT hold if * api clients bootstrap shm api over sockets (i.e. use memfd segments) and * vpp uses api svm region for event queues. */ void session_vpp_event_queues_allocate (session_main_t * smm) { u32 evt_q_length = 2048, evt_size = sizeof (session_event_t); ssvm_private_t *eqs = &smm->evt_qs_segment; uword eqs_size = 64 << 20; pid_t vpp_pid = getpid (); void *oldheap; int i; if (smm->configured_event_queue_length) evt_q_length = smm->configured_event_queue_length; if (smm->evt_qs_use_memfd_seg) { if (smm->evt_qs_segment_size) eqs_size = smm->evt_qs_segment_size; eqs->ssvm_size = eqs_size; eqs->i_am_master = 1; eqs->my_pid = vpp_pid; eqs->name = format (0, "%s%c", "evt-qs-segment", 0); eqs->requested_va = smm->session_baseva; if (ssvm_master_init (eqs, SSVM_SEGMENT_MEMFD)) { clib_warning ("failed to initialize queue segment"); return; } } if (smm->evt_qs_use_memfd_seg) oldheap = ssvm_push_heap (eqs->sh); else oldheap = vl_msg_push_heap (); for (i = 0; i < vec_len (smm->wrk); i++) { svm_msg_q_cfg_t _cfg, *cfg = &_cfg; svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = { {evt_q_length, evt_size, 0} , {evt_q_length >> 1, 256, 0} }; cfg->consumer_pid = 0; cfg->n_rings = 2; cfg->q_nitems = evt_q_length; cfg->ring_cfgs = rc; smm->wrk[i].vpp_event_queue = svm_msg_q_alloc (cfg); if (smm->evt_qs_use_memfd_seg) { if (svm_msg_q_alloc_consumer_eventfd (smm->wrk[i].vpp_event_queue)) clib_warning ("eventfd returned"); } } if (smm->evt_qs_use_memfd_seg) ssvm_pop_heap (oldheap); else vl_msg_pop_heap (oldheap); } ssvm_private_t * session_main_get_evt_q_segment (void) { session_main_t *smm = &session_main; if (smm->evt_qs_use_memfd_seg) return &smm->evt_qs_segment; return 0; } u64 session_segment_handle (session_t * s) { svm_fifo_t *f; if (!s->rx_fifo) return SESSION_INVALID_HANDLE; f = s->rx_fifo; return segment_manager_make_segment_handle (f->segment_manager, f->segment_index); } /* *INDENT-OFF* */ static session_fifo_rx_fn *session_tx_fns[TRANSPORT_TX_N_FNS] = { session_tx_fifo_peek_and_snd, session_tx_fifo_dequeue_and_snd, session_tx_fifo_dequeue_internal, session_tx_fifo_dequeue_and_snd }; /* *INDENT-ON* */ /** * Initialize session layer for given transport proto and ip version * * Allocates per session type (transport proto + ip version) data structures * and adds arc from session queue node to session type output node. */ void session_register_transport (transport_proto_t transport_proto, const transport_proto_vft_t * vft, u8 is_ip4, u32 output_node) { session_main_t *smm = &session_main; session_type_t session_type; u32 next_index = ~0; session_type = session_type_from_proto_and_ip (transport_proto, is_ip4); vec_validate (smm->session_type_to_next, session_type); vec_validate (smm->session_tx_fns, session_type); /* *INDENT-OFF* */ if (output_node != ~0) { foreach_vlib_main (({ next_index = vlib_node_add_next (this_vlib_main, session_queue_node.index, output_node); })); } /* *INDENT-ON* */ smm->session_type_to_next[session_type] = next_index; smm->session_tx_fns[session_type] = session_tx_fns[vft->transport_options.tx_type]; } transport_connection_t * session_get_transport (session_t * s) { if (s->session_state != SESSION_STATE_LISTENING) return transport_get_connection (session_get_transport_proto (s), s->connection_index, s->thread_index); else return transport_get_listener (session_get_transport_proto (s), s->connection_index); } void session_get_endpoint (session_t * s, transport_endpoint_t * tep, u8 is_lcl) { if (s->session_state != SESSION_STATE_LISTENING) return transport_get_endpoint (session_get_transport_proto (s), s->connection_index, s->thread_index, tep, is_lcl); else return transport_get_listener_endpoint (session_get_transport_proto (s), s->connection_index, tep, is_lcl); } transport_connection_t * listen_session_get_transport (session_t * s) { return transport_get_listener (session_get_transport_proto (s), s->connection_index); } void session_flush_frames_main_thread (vlib_main_t * vm) { ASSERT (vlib_get_thread_index () == 0); vlib_process_signal_event_mt (vm, session_queue_process_node.index, SESSION_Q_PROCESS_FLUSH_FRAMES, 0); } static clib_error_t * session_manager_main_enable (vlib_main_t * vm) { segment_manager_main_init_args_t _sm_args = { 0 }, *sm_args = &_sm_args; session_main_t *smm = &session_main; vlib_thread_main_t *vtm = vlib_get_thread_main (); u32 num_threads, preallocated_sessions_per_worker; session_worker_t *wrk; int i; num_threads = 1 /* main thread */ + vtm->n_threads; if (num_threads < 1) return clib_error_return (0, "n_thread_stacks not set"); /* Allocate cache line aligned worker contexts */ vec_validate_aligned (smm->wrk, num_threads - 1, CLIB_CACHE_LINE_BYTES); for (i = 0; i < num_threads; i++) { wrk = &smm->wrk[i]; wrk->ctrl_head = clib_llist_make_head (wrk->event_elts, evt_list); wrk->new_head = clib_llist_make_head (wrk->event_elts, evt_list); wrk->old_head = clib_llist_make_head (wrk->event_elts, evt_list); wrk->vm = vlib_mains[i]; wrk->last_vlib_time = vlib_time_now (vlib_mains[i]); wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ; if (num_threads > 1) clib_rwlock_init (&smm->wrk[i].peekers_rw_locks); } /* Allocate vpp event queues segment and queue */ session_vpp_event_queues_allocate (smm); /* Initialize fifo segment main baseva and timeout */ sm_args->baseva = smm->session_baseva + smm->evt_qs_segment_size; sm_args->size = smm->session_va_space_size; segment_manager_main_init (sm_args); /* Preallocate sessions */ if (smm->preallocated_sessions) { if (num_threads == 1) { pool_init_fixed (smm->wrk[0].sessions, smm->preallocated_sessions); } else { int j; preallocated_sessions_per_worker = (1.1 * (f64) smm->preallocated_sessions / (f64) (num_threads - 1)); for (j = 1; j < num_threads; j++) { pool_init_fixed (smm->wrk[j].sessions, preallocated_sessions_per_worker); } } } session_lookup_init (); app_namespaces_init (); transport_init (); smm->is_enabled = 1; /* Enable transports */ transport_enable_disable (vm, 1); return 0; } void session_node_enable_disable (u8 is_en) { u8 state = is_en ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED; vlib_thread_main_t *vtm = vlib_get_thread_main (); u8 have_workers = vtm->n_threads != 0; /* *INDENT-OFF* */ foreach_vlib_main (({ if (have_workers && ii == 0) { vlib_node_set_state (this_vlib_main, session_queue_process_node.index, state); if (is_en) { vlib_node_t *n = vlib_get_node (this_vlib_main, session_queue_process_node.index); vlib_start_process (this_vlib_main, n->runtime_index); } else { vlib_process_signal_event_mt (this_vlib_main, session_queue_process_node.index, SESSION_Q_PROCESS_STOP, 0); } continue; } vlib_node_set_state (this_vlib_main, session_queue_node.index, state); })); /* *INDENT-ON* */ } clib_error_t * vnet_session_enable_disable (vlib_main_t * vm, u8 is_en) { clib_error_t *error = 0; if (is_en) { if (session_main.is_enabled) return 0; error = session_manager_main_enable (vm); session_node_enable_disable (is_en); } else { session_main.is_enabled = 0; session_node_enable_disable (is_en); } return error; } clib_error_t * session_manager_main_init (vlib_main_t * vm) { session_main_t *smm = &session_main; smm->session_baseva = HIGH_SEGMENT_BASEVA; #if (HIGH_SEGMENT_BASEVA > (4ULL << 30)) smm->session_va_space_size = 128ULL << 30; smm->evt_qs_segment_size = 64 << 20; #else smm->session_va_space_size = 128 << 20; smm->evt_qs_segment_size = 1 << 20; #endif smm->is_enabled = 0; smm->session_enable_asap = 0; return 0; } static clib_error_t * session_main_init (vlib_main_t * vm) { session_main_t *smm = &session_main; if (smm->session_enable_asap) { vlib_worker_thread_barrier_sync (vm); vnet_session_enable_disable (vm, 1 /* is_en */ ); vlib_worker_thread_barrier_release (vm); } return 0; } VLIB_INIT_FUNCTION (session_manager_main_init); VLIB_MAIN_LOOP_ENTER_FUNCTION (session_main_init); static clib_error_t * session_config_fn (vlib_main_t * vm, unformat_input_t * input) { session_main_t *smm = &session_main; u32 nitems; uword tmp; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "event-queue-length %d", &nitems)) { if (nitems >= 2048) smm->configured_event_queue_length = nitems; else clib_warning ("event queue length %d too small, ignored", nitems); } else if (unformat (input, "preallocated-sessions %d", &smm->preallocated_sessions)) ; else if (unformat (input, "v4-session-table-buckets %d", &smm->configured_v4_session_table_buckets)) ; else if (unformat (input, "v4-halfopen-table-buckets %d", &smm->configured_v4_halfopen_table_buckets)) ; else if (unformat (input, "v6-session-table-buckets %d", &smm->configured_v6_session_table_buckets)) ; else if (unformat (input, "v6-halfopen-table-buckets %d", &smm->configured_v6_halfopen_table_buckets)) ; else if (unformat (input, "v4-session-table-memory %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000) return clib_error_return (0, "memory size %llx (%lld) too large", tmp, tmp); smm->configured_v4_session_table_memory = tmp; } else if (unformat (input, "v4-halfopen-table-memory %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000) return clib_error_return (0, "memory size %llx (%lld) too large", tmp, tmp); smm->configured_v4_halfopen_table_memory = tmp; } else if (unformat (input, "v6-session-table-memory %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000) return clib_error_return (0, "memory size %llx (%lld) too large", tmp, tmp); smm->configured_v6_session_table_memory = tmp; } else if (unformat (input, "v6-halfopen-table-memory %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000) return clib_error_return (0, "memory size %llx (%lld) too large", tmp, tmp); smm->configured_v6_halfopen_table_memory = tmp; } else if (unformat (input, "local-endpoints-table-memory %U", unformat_memory_size, &tmp)) { if (tmp >= 0x100000000) return clib_error_return (0, "memory size %llx (%lld) too large", tmp, tmp); smm->local_endpoints_table_memory = tmp; } else if (unformat (input, "local-endpoints-table-buckets %d", &smm->local_endpoints_table_buckets)) ; else if (unformat (input, "evt_qs_memfd_seg")) smm->evt_qs_use_memfd_seg = 1; else if (unformat (input, "evt_qs_seg_size %U", unformat_memory_size, &smm->evt_qs_segment_size)) ; else if (unformat (input, "enable")) smm->session_enable_asap = 1; else return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); } return 0; } VLIB_CONFIG_FUNCTION (session_config_fn, "session"); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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