/* * 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. */ #include <vnet/session/segment_manager.h> #include <vnet/session/session.h> #include <vnet/session/application.h> typedef struct segment_manager_main_ { segment_manager_t *segment_managers; /**< Pool of segment managers */ u32 seg_name_counter; /**< Counter for segment names */ /* * Configuration */ u32 default_fifo_size; /**< default rx/tx fifo size */ u32 default_segment_size; /**< default fifo segment size */ u32 default_app_mq_size; /**< default app msg q size */ u32 default_max_fifo_size; /**< default max fifo size */ u8 default_high_watermark; /**< default high watermark % */ u8 default_low_watermark; /**< default low watermark % */ } segment_manager_main_t; static segment_manager_main_t sm_main; #define segment_manager_foreach_segment_w_lock(VAR, SM, BODY) \ do { \ clib_rwlock_reader_lock (&(SM)->segments_rwlock); \ pool_foreach((VAR), ((SM)->segments)) (BODY); \ clib_rwlock_reader_unlock (&(SM)->segments_rwlock); \ } while (0) static segment_manager_props_t * segment_manager_properties_get (segment_manager_t * sm) { app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index); return application_get_segment_manager_properties (app_wrk->app_index); } segment_manager_props_t * segment_manager_props_init (segment_manager_props_t * props) { props->add_segment_size = sm_main.default_segment_size; props->rx_fifo_size = sm_main.default_fifo_size; props->tx_fifo_size = sm_main.default_fifo_size; props->evt_q_size = sm_main.default_app_mq_size; props->max_fifo_size = sm_main.default_max_fifo_size; props->high_watermark = sm_main.default_high_watermark; props->low_watermark = sm_main.default_low_watermark; props->n_slices = vlib_num_workers () + 1; return props; } u8 segment_manager_app_detached (segment_manager_t * sm) { return (sm->flags & SEG_MANAGER_F_DETACHED); } void segment_manager_app_detach (segment_manager_t * sm) { sm->flags |= SEG_MANAGER_F_DETACHED; } always_inline u32 segment_manager_segment_index (segment_manager_t * sm, fifo_segment_t * seg) { return (seg - sm->segments); } /** * Adds segment to segment manager's pool * * If needed a writer's lock is acquired before allocating a new segment * to avoid affecting any of the segments pool readers. */ static inline int segment_manager_add_segment_inline (segment_manager_t *sm, uword segment_size, u8 notify_app, u8 flags, u8 need_lock) { segment_manager_main_t *smm = &sm_main; segment_manager_props_t *props; app_worker_t *app_wrk; fifo_segment_t *fs; u32 fs_index = ~0; u8 *seg_name; int rv; props = segment_manager_properties_get (sm); app_wrk = app_worker_get (sm->app_wrk_index); /* Not configured for addition of new segments and not first */ if (!props->add_segment && !segment_size) { clib_warning ("cannot allocate new segment"); return VNET_API_ERROR_INVALID_VALUE; } /* * Allocate fifo segment and grab lock if needed */ if (need_lock) clib_rwlock_writer_lock (&sm->segments_rwlock); pool_get_zero (sm->segments, fs); /* * Allocate ssvm segment */ segment_size = segment_size ? segment_size : props->add_segment_size; /* add overhead to ensure the result segment size is at least * of that requested */ segment_size += sizeof (fifo_segment_header_t) + vlib_thread_main.n_vlib_mains * sizeof (fifo_segment_slice_t) + FIFO_SEGMENT_ALLOC_OVERHEAD; segment_size = round_pow2 (segment_size, clib_mem_get_page_size ()); seg_name = format (0, "seg-%u-%u-%u%c", app_wrk->app_index, app_wrk->wrk_index, smm->seg_name_counter++, 0); fs->ssvm.ssvm_size = segment_size; fs->ssvm.name = seg_name; fs->ssvm.requested_va = 0; if ((rv = ssvm_server_init (&fs->ssvm, props->segment_type))) { clib_warning ("svm_master_init ('%v', %u) failed", seg_name, segment_size); pool_put (sm->segments, fs); goto done; } /* * Initialize fifo segment */ fs->n_slices = props->n_slices; fifo_segment_init (fs); /* * Save segment index before dropping lock, if any held */ fs_index = fs - sm->segments; fs->fs_index = fs_index; fs->sm_index = segment_manager_index (sm); /* * Set watermarks in segment */ fs->high_watermark = sm->high_watermark; fs->low_watermark = sm->low_watermark; fs->flags = flags; fs->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT; fs->h->pct_first_alloc = props->pct_first_alloc; if (notify_app) { app_worker_t *app_wrk; u64 fs_handle; fs_handle = segment_manager_segment_handle (sm, fs); app_wrk = app_worker_get (sm->app_wrk_index); rv = app_worker_add_segment_notify (app_wrk, fs_handle); if (rv) { fs_index = rv; goto done; } } done: if (need_lock) clib_rwlock_writer_unlock (&sm->segments_rwlock); return fs_index; } int segment_manager_add_segment (segment_manager_t *sm, uword segment_size, u8 notify_app) { return segment_manager_add_segment_inline (sm, segment_size, notify_app, 0 /* flags */, 0 /* need_lock */); } int segment_manager_add_segment2 (segment_manager_t *sm, uword segment_size, u8 flags) { return segment_manager_add_segment_inline (sm, segment_size, 0, flags, vlib_num_workers ()); } /** * Remove segment without lock */ void segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs) { if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE) { if (!segment_manager_app_detached (sm)) { app_worker_t *app_wrk; u64 segment_handle; app_wrk = app_worker_get (sm->app_wrk_index); segment_handle = segment_manager_segment_handle (sm, fs); app_worker_del_segment_notify (app_wrk, segment_handle); } } fifo_segment_cleanup (fs); ssvm_delete (&fs->ssvm); if (CLIB_DEBUG) clib_memset (fs, 0xfb, sizeof (*fs)); pool_put (sm->segments, fs); } static fifo_segment_t * segment_manager_get_segment_if_valid (segment_manager_t * sm, u32 segment_index) { if (pool_is_free_index (sm->segments, segment_index)) return 0; return pool_elt_at_index (sm->segments, segment_index); } /** * Removes segment after acquiring writer lock */ static inline void sm_lock_and_del_segment_inline (segment_manager_t *sm, u32 fs_index, u8 check_if_empty) { fifo_segment_t *fs; u8 is_prealloc; clib_rwlock_writer_lock (&sm->segments_rwlock); fs = segment_manager_get_segment_if_valid (sm, fs_index); if (!fs) goto done; if (check_if_empty && fifo_segment_has_fifos (fs)) goto done; is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED; if (is_prealloc && !segment_manager_app_detached (sm)) goto done; segment_manager_del_segment (sm, fs); done: clib_rwlock_writer_unlock (&sm->segments_rwlock); } void segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index) { sm_lock_and_del_segment_inline (sm, fs_index, 0 /* check_if_empty */); } /** * Reads a segment from the segment manager's pool without lock */ fifo_segment_t * segment_manager_get_segment (segment_manager_t * sm, u32 segment_index) { return pool_elt_at_index (sm->segments, segment_index); } u64 segment_manager_segment_handle (segment_manager_t * sm, fifo_segment_t * segment) { u32 segment_index = segment_manager_segment_index (sm, segment); return (((u64) segment_manager_index (sm) << 32) | segment_index); } u64 segment_manager_make_segment_handle (u32 segment_manager_index, u32 segment_index) { return (((u64) segment_manager_index << 32) | segment_index); } fifo_segment_t * segment_manager_get_segment_w_handle (u64 segment_handle) { u32 sm_index, segment_index; segment_manager_t *sm; segment_manager_parse_segment_handle (segment_handle, &sm_index, &segment_index); sm = segment_manager_get (sm_index); if (!sm || pool_is_free_index (sm->segments, segment_index)) return 0; return pool_elt_at_index (sm->segments, segment_index); } /** * Reads a segment from the segment manager's pool and acquires reader lock * * Caller must drop the reader's lock by calling * @ref segment_manager_segment_reader_unlock once it finishes working with * the segment. */ fifo_segment_t * segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index) { clib_rwlock_reader_lock (&sm->segments_rwlock); return pool_elt_at_index (sm->segments, segment_index); } void segment_manager_segment_reader_lock (segment_manager_t * sm) { clib_rwlock_reader_lock (&sm->segments_rwlock); } void segment_manager_segment_reader_unlock (segment_manager_t * sm) { clib_rwlock_reader_unlock (&sm->segments_rwlock); } segment_manager_t * segment_manager_alloc (void) { segment_manager_main_t *smm = &sm_main; segment_manager_t *sm; pool_get_zero (smm->segment_managers, sm); clib_rwlock_init (&sm->segments_rwlock); return sm; } int segment_manager_init (segment_manager_t * sm) { segment_manager_props_t *props; props = segment_manager_properties_get (sm); sm->max_fifo_size = props->max_fifo_size ? props->max_fifo_size : sm_main.default_max_fifo_size; sm->max_fifo_size = clib_max (sm->max_fifo_size, 4096); segment_manager_set_watermarks (sm, props->high_watermark, props->low_watermark); return 0; } /** * Initializes segment manager based on options provided. * Returns error if ssvm segment(s) allocation fails. */ int segment_manager_init_first (segment_manager_t * sm) { segment_manager_props_t *props; uword first_seg_size; fifo_segment_t *fs; int fs_index, i; segment_manager_init (sm); props = segment_manager_properties_get (sm); first_seg_size = clib_max (props->segment_size, sm_main.default_segment_size); if (props->prealloc_fifos) { u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10); u32 rx_rounded_data_size, tx_rounded_data_size; u32 prealloc_fifo_pairs = props->prealloc_fifos; u32 rx_fifo_size, tx_fifo_size, pair_size; u32 approx_segment_count; /* Figure out how many segments should be preallocated */ rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size))); tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size))); rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size; tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size; pair_size = rx_fifo_size + tx_fifo_size; approx_total_size = (u64) prealloc_fifo_pairs *pair_size; if (first_seg_size > approx_total_size) max_seg_size = first_seg_size; approx_segment_count = (approx_total_size + (max_seg_size - 1)) / max_seg_size; /* Allocate the segments */ for (i = 0; i < approx_segment_count + 1; i++) { fs_index = segment_manager_add_segment (sm, max_seg_size, 0); if (fs_index < 0) { clib_warning ("Failed to preallocate segment %d", i); return fs_index; } fs = segment_manager_get_segment (sm, fs_index); if (i == 0) sm->event_queue = segment_manager_alloc_queue (fs, props); fifo_segment_preallocate_fifo_pairs (fs, props->rx_fifo_size, props->tx_fifo_size, &prealloc_fifo_pairs); fifo_segment_flags (fs) = FIFO_SEGMENT_F_IS_PREALLOCATED; if (prealloc_fifo_pairs == 0) break; } return 0; } fs_index = segment_manager_add_segment (sm, first_seg_size, 0); if (fs_index < 0) { clib_warning ("Failed to allocate segment"); return fs_index; } fs = segment_manager_get_segment (sm, fs_index); sm->event_queue = segment_manager_alloc_queue (fs, props); if (props->prealloc_fifo_hdrs) { u32 hdrs_per_slice; /* Do not preallocate on slice associated to main thread */ i = (vlib_num_workers ()? 1 : 0); hdrs_per_slice = props->prealloc_fifo_hdrs / (fs->n_slices - i); for (; i < fs->n_slices; i++) { if (fifo_segment_prealloc_fifo_hdrs (fs, i, hdrs_per_slice)) return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL; } } return 0; } void segment_manager_cleanup_detached_listener (segment_manager_t * sm) { app_worker_t *app_wrk; app_wrk = app_worker_get_if_valid (sm->app_wrk_index); if (!app_wrk) return; app_worker_del_detached_sm (app_wrk, segment_manager_index (sm)); } /** * Cleanup segment manager. */ void segment_manager_free (segment_manager_t * sm) { segment_manager_main_t *smm = &sm_main; fifo_segment_t *fifo_segment; ASSERT (vlib_get_thread_index () == 0 && !segment_manager_has_fifos (sm) && segment_manager_app_detached (sm)); if (sm->flags & SEG_MANAGER_F_DETACHED_LISTENER) segment_manager_cleanup_detached_listener (sm); /* If we have empty preallocated segments that haven't been removed, remove * them now. Apart from that, the first segment in the first segment manager * is not removed when all fifos are removed. It can only be removed when * the manager is explicitly deleted/detached by the app. */ clib_rwlock_writer_lock (&sm->segments_rwlock); /* *INDENT-OFF* */ pool_foreach (fifo_segment, sm->segments) { segment_manager_del_segment (sm, fifo_segment); } /* *INDENT-ON* */ pool_free (sm->segments); clib_rwlock_writer_unlock (&sm->segments_rwlock); clib_rwlock_free (&sm->segments_rwlock); if (CLIB_DEBUG) clib_memset (sm, 0xfe, sizeof (*sm)); pool_put (smm->segment_managers, sm); } static void sm_free_w_index_helper (void *arg) { u32 sm_index = *(u32 *) arg; segment_manager_t *sm; ASSERT (vlib_get_thread_index () == 0); if ((sm = segment_manager_get_if_valid (sm_index))) segment_manager_free (sm); } void segment_manager_free_safe (segment_manager_t *sm) { if (!vlib_thread_is_main_w_barrier ()) { u32 sm_index = segment_manager_index (sm); vlib_rpc_call_main_thread (sm_free_w_index_helper, (u8 *) & sm_index, sizeof (sm_index)); } else { segment_manager_free (sm); } } void segment_manager_init_free (segment_manager_t * sm) { ASSERT (vlib_get_thread_index () == 0); segment_manager_app_detach (sm); if (segment_manager_has_fifos (sm)) segment_manager_del_sessions (sm); else { ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm)); segment_manager_free (sm); } } segment_manager_t * segment_manager_get (u32 index) { return pool_elt_at_index (sm_main.segment_managers, index); } segment_manager_t * segment_manager_get_if_valid (u32 index) { if (pool_is_free_index (sm_main.segment_managers, index)) return 0; return pool_elt_at_index (sm_main.segment_managers, index); } u32 segment_manager_index (segment_manager_t * sm) { return sm - sm_main.segment_managers; } u8 segment_manager_has_fifos (segment_manager_t * sm) { fifo_segment_t *seg; u8 first = 1; /* *INDENT-OFF* */ segment_manager_foreach_segment_w_lock (seg, sm, ({ if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg) && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED)) { clib_warning ("segment %d has no fifos!", segment_manager_segment_index (sm, seg)); first = 0; } if (fifo_segment_has_fifos (seg)) { segment_manager_segment_reader_unlock (sm); return 1; } })); /* *INDENT-ON* */ return 0; } /** * Initiate disconnects for all sessions 'owned' by a segment manager */ void segment_manager_del_sessions (segment_manager_t * sm) { session_handle_t *handles = 0, *handle; fifo_segment_t *fs; session_t *session; int slice_index; svm_fifo_t *f; ASSERT (pool_elts (sm->segments) != 0); /* Across all fifo segments used by the server */ /* *INDENT-OFF* */ segment_manager_foreach_segment_w_lock (fs, sm, ({ for (slice_index = 0; slice_index < fs->n_slices; slice_index++) { f = fifo_segment_get_slice_fifo_list (fs, slice_index); /* * Remove any residual sessions from the session lookup table * Don't bother deleting the individual fifos, we're going to * throw away the fifo segment in a minute. */ while (f) { session = session_get_if_valid (f->shr->master_session_index, f->master_thread_index); if (session) vec_add1 (handles, session_handle (session)); f = f->next; } } /* Instead of removing the segment, test when cleaning up disconnected * sessions if the segment can be removed. */ })); /* *INDENT-ON* */ vec_foreach (handle, handles) { session = session_get_from_handle (*handle); session_close (session); /* Avoid propagating notifications back to the app */ session->app_wrk_index = APP_INVALID_INDEX; } vec_free (handles); } /** * Initiate disconnects for sessions in specified state 'owned' by a segment * manager */ void segment_manager_del_sessions_filter (segment_manager_t *sm, session_state_t *states) { session_handle_t *handles = 0, *handle; fifo_segment_t *fs; session_t *session; int slice_index; svm_fifo_t *f; ASSERT (pool_elts (sm->segments) != 0); /* Across all fifo segments used by the server */ segment_manager_foreach_segment_w_lock ( fs, sm, ({ for (slice_index = 0; slice_index < fs->n_slices; slice_index++) { f = fifo_segment_get_slice_fifo_list (fs, slice_index); while (f) { session = session_get_if_valid (f->shr->master_session_index, f->master_thread_index); if (session) { session_state_t *state; vec_foreach (state, states) { if (session->session_state == *state) { vec_add1 (handles, session_handle (session)); break; } } } f = f->next; } } })); vec_foreach (handle, handles) { session = session_get_from_handle (*handle); session_close (session); /* Avoid propagating notifications back to the app */ session->app_wrk_index = APP_INVALID_INDEX; } vec_free (handles); } int segment_manager_try_alloc_fifos (fifo_segment_t *fs, u32 thread_index, u32 rx_fifo_size, u32 tx_fifo_size, svm_fifo_t **rx_fifo, svm_fifo_t **tx_fifo) { rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size); *rx_fifo = fifo_segment_alloc_fifo_w_slice (fs, thread_index, rx_fifo_size, FIFO_SEGMENT_RX_FIFO); tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size); *tx_fifo = fifo_segment_alloc_fifo_w_slice (fs, thread_index, tx_fifo_size, FIFO_SEGMENT_TX_FIFO); if (*rx_fifo == 0) { /* This would be very odd, but handle it... */ if (*tx_fifo != 0) { fifo_segment_free_fifo (fs, *tx_fifo); *tx_fifo = 0; } return SESSION_E_SEG_NO_SPACE; } if (*tx_fifo == 0) { if (*rx_fifo != 0) { fifo_segment_free_fifo (fs, *rx_fifo); *rx_fifo = 0; } return SESSION_E_SEG_NO_SPACE; } return 0; } static inline int sm_lookup_segment_and_alloc_fifos (segment_manager_t *sm, segment_manager_props_t *props, u32 thread_index, svm_fifo_t **rx_fifo, svm_fifo_t **tx_fifo) { uword free_bytes, max_free_bytes; fifo_segment_t *cur, *fs = 0; max_free_bytes = props->rx_fifo_size + props->tx_fifo_size - 1; pool_foreach (cur, sm->segments) { if (fifo_segment_flags (cur) & FIFO_SEGMENT_F_CUSTOM_USE) continue; free_bytes = fifo_segment_available_bytes (cur); if (free_bytes > max_free_bytes) { max_free_bytes = free_bytes; fs = cur; } } if (PREDICT_FALSE (!fs)) return SESSION_E_SEG_NO_SPACE; return segment_manager_try_alloc_fifos ( fs, thread_index, props->rx_fifo_size, props->tx_fifo_size, rx_fifo, tx_fifo); } static int sm_lock_and_alloc_segment_and_fifos (segment_manager_t *sm, segment_manager_props_t *props, u32 thread_index, svm_fifo_t **rx_fifo, svm_fifo_t **tx_fifo) { int new_fs_index, rv; fifo_segment_t *fs; if (!props->add_segment) return SESSION_E_SEG_NO_SPACE; clib_rwlock_writer_lock (&sm->segments_rwlock); /* Make sure there really is no free space. Another worker might've freed * some fifos or allocated a segment */ rv = sm_lookup_segment_and_alloc_fifos (sm, props, thread_index, rx_fifo, tx_fifo); if (!rv) goto done; new_fs_index = segment_manager_add_segment (sm, 0 /* segment_size*/, 1 /* notify_app */); if (new_fs_index < 0) { rv = SESSION_E_SEG_CREATE; goto done; } fs = segment_manager_get_segment (sm, new_fs_index); rv = segment_manager_try_alloc_fifos (fs, thread_index, props->rx_fifo_size, props->tx_fifo_size, rx_fifo, tx_fifo); if (rv) { clib_warning ("Added a segment, still can't allocate a fifo"); rv = SESSION_E_SEG_NO_SPACE2; goto done; } done: clib_rwlock_writer_unlock (&sm->segments_rwlock); return rv; } int segment_manager_alloc_session_fifos (segment_manager_t * sm, u32 thread_index, svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo) { segment_manager_props_t *props; int rv; props = segment_manager_properties_get (sm); /* * Fast path: find the first segment with enough free space and * try to allocate the fifos. Done with reader lock */ segment_manager_segment_reader_lock (sm); rv = sm_lookup_segment_and_alloc_fifos (sm, props, thread_index, rx_fifo, tx_fifo); segment_manager_segment_reader_unlock (sm); /* * Slow path: if no fifo segment or alloc fail grab writer lock and try * to allocate new segment */ if (PREDICT_FALSE (rv < 0)) return sm_lock_and_alloc_segment_and_fifos (sm, props, thread_index, rx_fifo, tx_fifo); return 0; } void segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo) { segment_manager_t *sm; fifo_segment_t *fs; u32 segment_index; u8 try_delete = 0; if (!rx_fifo || !tx_fifo) return; /* It's possible to have no segment manager if the session was removed * as result of a detach. */ if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager))) return; segment_index = rx_fifo->segment_index; fs = segment_manager_get_segment_w_lock (sm, segment_index); fifo_segment_free_fifo (fs, rx_fifo); fifo_segment_free_fifo (fs, tx_fifo); /* * Try to remove fifo segment if it has no fifos. This can be done only if * the segment is not the first in the segment manager or if it is first * and it is not protected. Moreover, if the segment is first and the app * has detached from the segment manager, remove the segment manager. */ if (!fifo_segment_has_fifos (fs)) { /* If first, remove only if not protected */ try_delete = segment_index != 0 || !sm->first_is_protected; } segment_manager_segment_reader_unlock (sm); if (PREDICT_FALSE (try_delete)) { /* Only remove if empty after writer lock acquired */ sm_lock_and_del_segment_inline (sm, segment_index, 1 /* check_if_empty */); /* Remove segment manager if no sessions and detached from app */ if (segment_manager_app_detached (sm) && !segment_manager_has_fifos (sm)) segment_manager_free_safe (sm); } } void segment_manager_detach_fifo (segment_manager_t *sm, svm_fifo_t **f) { fifo_segment_t *fs; fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index); fifo_segment_detach_fifo (fs, f); segment_manager_segment_reader_unlock (sm); } void segment_manager_attach_fifo (segment_manager_t *sm, svm_fifo_t **f, session_t *s) { fifo_segment_t *fs; fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index); fifo_segment_attach_fifo (fs, f, s->thread_index); segment_manager_segment_reader_unlock (sm); (*f)->shr->master_session_index = s->session_index; (*f)->master_thread_index = s->thread_index; } u32 segment_manager_evt_q_expected_size (u32 q_len) { u32 fifo_evt_size, notif_q_size, q_hdrs; u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz; fifo_evt_size = 1 << max_log2 (sizeof (session_event_t)); notif_q_size = clib_max (16, q_len >> 4); msg_q_sz = q_len * sizeof (svm_msg_q_msg_t); fifo_evt_ring_sz = q_len * fifo_evt_size; session_ntf_ring_sz = notif_q_size * 256; q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t); return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs); } /** * Allocates shm queue in the first segment * * Must be called with lock held */ svm_msg_q_t * segment_manager_alloc_queue (fifo_segment_t * segment, segment_manager_props_t * props) { u32 fifo_evt_size, session_evt_size = 256, notif_q_size; svm_msg_q_cfg_t _cfg, *cfg = &_cfg; svm_msg_q_t *q; fifo_evt_size = sizeof (session_event_t); notif_q_size = clib_max (16, props->evt_q_size >> 4); /* *INDENT-OFF* */ svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = { {props->evt_q_size, fifo_evt_size, 0}, {notif_q_size, session_evt_size, 0} }; /* *INDENT-ON* */ cfg->consumer_pid = 0; cfg->n_rings = 2; cfg->q_nitems = props->evt_q_size; cfg->ring_cfgs = rc; q = fifo_segment_msg_q_alloc (segment, 0, cfg); if (props->use_mq_eventfd) { if (svm_msg_q_alloc_eventfd (q)) clib_warning ("failed to alloc eventfd"); } return q; } svm_msg_q_t * segment_manager_event_queue (segment_manager_t * sm) { return sm->event_queue; } /** * Frees shm queue allocated in the first segment */ void segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q) { fifo_segment_t *segment; ssvm_shared_header_t *sh; void *oldheap; ASSERT (!pool_is_free_index (sm->segments, 0)); segment = segment_manager_get_segment_w_lock (sm, 0); sh = segment->ssvm.sh; oldheap = ssvm_push_heap (sh); svm_queue_free (q); ssvm_pop_heap (oldheap); segment_manager_segment_reader_unlock (sm); } /* * Init segment vm address allocator */ void segment_manager_main_init (void) { segment_manager_main_t *sm = &sm_main; sm->default_fifo_size = 1 << 12; sm->default_segment_size = 1 << 20; sm->default_app_mq_size = 128; sm->default_max_fifo_size = 4 << 20; sm->default_high_watermark = 80; sm->default_low_watermark = 50; } static u8 * format_segment_manager (u8 *s, va_list *args) { segment_manager_t *sm = va_arg (*args, segment_manager_t *); int verbose = va_arg (*args, int); app_worker_t *app_wrk; uword max_fifo_size; fifo_segment_t *seg; application_t *app; u8 custom_logic; app_wrk = app_worker_get_if_valid (sm->app_wrk_index); app = app_wrk ? application_get (app_wrk->app_index) : 0; custom_logic = (app && (app->cb_fns.fifo_tuning_callback)) ? 1 : 0; max_fifo_size = sm->max_fifo_size; s = format (s, "[%u] %v app-wrk: %u segs: %u max-fifo-sz: %U " "wmarks: %u %u %s flags: 0x%x", segment_manager_index (sm), app ? app->name : 0, sm->app_wrk_index, pool_elts (sm->segments), format_memory_size, max_fifo_size, sm->high_watermark, sm->low_watermark, custom_logic ? "custom-tuning" : "no-tuning", sm->flags); if (!verbose || !pool_elts (sm->segments)) return s; s = format (s, "\n\n"); segment_manager_foreach_segment_w_lock ( seg, sm, ({ s = format (s, " *%U", format_fifo_segment, seg, verbose); })); return s; } static clib_error_t * segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { unformat_input_t _line_input, *line_input = &_line_input; segment_manager_main_t *smm = &sm_main; u8 show_segments = 0, verbose = 0; segment_manager_t *sm; u32 sm_index = ~0; if (!unformat_user (input, unformat_line_input, line_input)) { vlib_cli_output (vm, "%d segment managers allocated", pool_elts (smm->segment_managers)); return 0; } while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) { if (unformat (line_input, "segments")) show_segments = 1; else if (unformat (line_input, "verbose")) verbose = 1; else if (unformat (line_input, "index %u", &sm_index)) ; else { vlib_cli_output (vm, "unknown input [%U]", format_unformat_error, line_input); goto done; } } if (!pool_elts (smm->segment_managers)) goto done; if (sm_index != ~0) { sm = segment_manager_get_if_valid (sm_index); if (!sm) { vlib_cli_output (vm, "segment manager %u not allocated", sm_index); goto done; } vlib_cli_output (vm, "%U", format_segment_manager, sm, 1 /* verbose */); goto done; } if (verbose || show_segments) { pool_foreach (sm, smm->segment_managers) { vlib_cli_output (vm, "%U", format_segment_manager, sm, show_segments); } vlib_cli_output (vm, "\n"); } done: unformat_free (line_input); return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (segment_manager_show_command, static) = { .path = "show segment-manager", .short_help = "show segment-manager [segments][verbose][index <nn>]", .function = segment_manager_show_fn, }; /* *INDENT-ON* */ void segment_manager_format_sessions (segment_manager_t * sm, int verbose) { vlib_main_t *vm = vlib_get_main (); app_worker_t *app_wrk; fifo_segment_t *fs; const u8 *app_name; int slice_index; u8 *s = 0, *str; svm_fifo_t *f; if (!sm) { if (verbose) vlib_cli_output (vm, "%-" SESSION_CLI_ID_LEN "s%-20s%-15s%-10s", "Connection", "App", "API Client", "SegManager"); else vlib_cli_output (vm, "%-" SESSION_CLI_ID_LEN "s%-20s", "Connection", "App"); return; } app_wrk = app_worker_get (sm->app_wrk_index); app_name = application_name_from_index (app_wrk->app_index); clib_rwlock_reader_lock (&sm->segments_rwlock); /* *INDENT-OFF* */ pool_foreach (fs, sm->segments) { for (slice_index = 0; slice_index < fs->n_slices; slice_index++) { f = fifo_segment_get_slice_fifo_list (fs, slice_index); while (f) { u32 session_index, thread_index; session_t *session; session_index = f->shr->master_session_index; thread_index = f->master_thread_index; session = session_get (session_index, thread_index); str = format (0, "%U", format_session, session, verbose); if (verbose) s = format (s, "%-" SESSION_CLI_ID_LEN "v%-20v%-15u%-10u", str, app_name, app_wrk->api_client_index, app_wrk->connects_seg_manager); else s = format (s, "%-" SESSION_CLI_ID_LEN "v%-20v", str, app_name); vlib_cli_output (vm, "%v", s); vec_reset_length (s); vec_free (str); f = f->next; } vec_free (s); } } /* *INDENT-ON* */ clib_rwlock_reader_unlock (&sm->segments_rwlock); } void segment_manager_set_watermarks (segment_manager_t * sm, u8 high_watermark, u8 low_watermark) { ASSERT (high_watermark <= 100 && low_watermark <= 100 && low_watermark <= high_watermark); sm->high_watermark = high_watermark; sm->low_watermark = low_watermark; } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */