| /* |
| * 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. |
| */ |
| int |
| segment_manager_add_segment (segment_manager_t *sm, uword segment_size, |
| u8 notify_app) |
| { |
| segment_manager_main_t *smm = &sm_main; |
| segment_manager_props_t *props; |
| fifo_segment_t *fs; |
| u32 fs_index = ~0; |
| u8 *seg_name; |
| int rv; |
| |
| props = segment_manager_properties_get (sm); |
| |
| /* 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 (vlib_num_workers ()) |
| 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; |
| segment_size = round_pow2 (segment_size, clib_mem_get_page_size ()); |
| |
| if (props->segment_type != SSVM_SEGMENT_PRIVATE) |
| { |
| seg_name = format (0, "%d-%d%c", getpid (), smm->seg_name_counter++, 0); |
| } |
| else |
| { |
| app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index); |
| application_t *app = application_get (app_wrk->app_index); |
| seg_name = format (0, "%v segment%c", app->name, 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; |
| |
| /* |
| * Set watermarks in segment |
| */ |
| fs->h->high_watermark = sm->high_watermark; |
| fs->h->low_watermark = sm->low_watermark; |
| fs->h->pct_first_alloc = props->pct_first_alloc; |
| fs->h->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT; |
| |
| 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) |
| return rv; |
| } |
| done: |
| |
| if (vlib_num_workers ()) |
| clib_rwlock_writer_unlock (&sm->segments_rwlock); |
| |
| return fs_index; |
| } |
| |
| /** |
| * 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) |
| { |
| 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; |
| |
| 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); |
| } |
| |
| /** |
| * 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); |
| } |
| |
| void |
| segment_manager_segment_writer_unlock (segment_manager_t * sm) |
| { |
| clib_rwlock_writer_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); |
| } |
| |
| static 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); |
| } |
| |
| int |
| segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment, |
| 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 (fifo_segment, 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 (fifo_segment, 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 (fifo_segment, *tx_fifo); |
| *tx_fifo = 0; |
| } |
| return -1; |
| } |
| if (*tx_fifo == 0) |
| { |
| if (*rx_fifo != 0) |
| { |
| fifo_segment_free_fifo (fifo_segment, *rx_fifo); |
| *rx_fifo = 0; |
| } |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int |
| segment_manager_alloc_session_fifos (segment_manager_t * sm, |
| u32 thread_index, |
| svm_fifo_t ** rx_fifo, |
| svm_fifo_t ** tx_fifo) |
| { |
| int alloc_fail = 1, rv = 0, new_fs_index; |
| uword free_bytes, max_free_bytes = 0; |
| segment_manager_props_t *props; |
| fifo_segment_t *fs = 0, *cur; |
| u32 sm_index, fs_index; |
| |
| props = segment_manager_properties_get (sm); |
| |
| /* |
| * Find the first free segment to allocate the fifos in |
| */ |
| |
| segment_manager_segment_reader_lock (sm); |
| |
| /* *INDENT-OFF* */ |
| pool_foreach (cur, sm->segments) { |
| free_bytes = fifo_segment_available_bytes (cur); |
| if (free_bytes > max_free_bytes) |
| { |
| max_free_bytes = free_bytes; |
| fs = cur; |
| } |
| } |
| /* *INDENT-ON* */ |
| |
| if (fs) |
| { |
| alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index, |
| props->rx_fifo_size, |
| props->tx_fifo_size, |
| rx_fifo, tx_fifo); |
| /* On success, keep lock until fifos are initialized */ |
| if (!alloc_fail) |
| goto alloc_success; |
| } |
| |
| segment_manager_segment_reader_unlock (sm); |
| |
| /* |
| * Allocation failed, see if we can add a new segment |
| */ |
| if (props->add_segment) |
| { |
| if ((new_fs_index = segment_manager_add_segment (sm, 0, 1)) < 0) |
| { |
| clib_warning ("Failed to add new segment"); |
| return SESSION_E_SEG_CREATE; |
| } |
| fs = segment_manager_get_segment_w_lock (sm, new_fs_index); |
| alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index, |
| props->rx_fifo_size, |
| props->tx_fifo_size, |
| rx_fifo, tx_fifo); |
| if (alloc_fail) |
| { |
| clib_warning ("Added a segment, still can't allocate a fifo"); |
| segment_manager_segment_reader_unlock (sm); |
| return SESSION_E_SEG_NO_SPACE2; |
| } |
| } |
| else |
| { |
| SESSION_DBG ("Can't add new seg and no space to allocate fifos!"); |
| return SESSION_E_SEG_NO_SPACE; |
| } |
| |
| alloc_success: |
| ASSERT (rx_fifo && tx_fifo); |
| |
| sm_index = segment_manager_index (sm); |
| fs_index = segment_manager_segment_index (sm, fs); |
| (*tx_fifo)->segment_manager = sm_index; |
| (*rx_fifo)->segment_manager = sm_index; |
| (*tx_fifo)->segment_index = fs_index; |
| (*rx_fifo)->segment_index = fs_index; |
| |
| /* Drop the lock after app is notified */ |
| segment_manager_segment_reader_unlock (sm); |
| |
| return rv; |
| } |
| |
| 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; |
| |
| 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 svm 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)) |
| { |
| segment_manager_segment_reader_unlock (sm); |
| |
| /* Remove segment if it holds no fifos or first but not protected */ |
| if (segment_index != 0 || !sm->first_is_protected) |
| sm_lock_and_del_segment_inline (sm, segment_index); |
| |
| /* 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); |
| } |
| else |
| segment_manager_segment_reader_unlock (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 clib_error_t * |
| segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input, |
| vlib_cli_command_t * cmd) |
| { |
| segment_manager_main_t *smm = &sm_main; |
| u8 show_segments = 0, verbose = 0; |
| uword max_fifo_size; |
| segment_manager_t *sm; |
| fifo_segment_t *seg; |
| app_worker_t *app_wrk; |
| application_t *app; |
| u8 custom_logic; |
| |
| while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) |
| { |
| if (unformat (input, "segments")) |
| show_segments = 1; |
| else if (unformat (input, "verbose")) |
| verbose = 1; |
| else |
| return clib_error_return (0, "unknown input `%U'", |
| format_unformat_error, input); |
| } |
| vlib_cli_output (vm, "%d segment managers allocated", |
| pool_elts (smm->segment_managers)); |
| if (verbose && pool_elts (smm->segment_managers)) |
| { |
| vlib_cli_output (vm, "%-6s%=10s%=10s%=13s%=11s%=11s%=12s", |
| "Index", "AppIndex", "Segments", "MaxFifoSize", |
| "HighWater", "LowWater", "FifoTuning"); |
| |
| /* *INDENT-OFF* */ |
| pool_foreach (sm, smm->segment_managers) { |
| 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; |
| |
| vlib_cli_output (vm, "%-6d%=10d%=10d%=13U%=11d%=11d%=12s", |
| segment_manager_index (sm), |
| sm->app_wrk_index, pool_elts (sm->segments), |
| format_memory_size, max_fifo_size, |
| sm->high_watermark, sm->low_watermark, |
| custom_logic ? "custom" : "none"); |
| } |
| /* *INDENT-ON* */ |
| |
| vlib_cli_output (vm, "\n"); |
| } |
| if (show_segments) |
| { |
| vlib_cli_output (vm, "%U", format_fifo_segment, 0, verbose); |
| |
| /* *INDENT-OFF* */ |
| pool_foreach (sm, smm->segment_managers) { |
| segment_manager_foreach_segment_w_lock (seg, sm, ({ |
| vlib_cli_output (vm, "%U", format_fifo_segment, seg, verbose); |
| })); |
| } |
| /* *INDENT-ON* */ |
| |
| } |
| return 0; |
| } |
| |
| /* *INDENT-OFF* */ |
| VLIB_CLI_COMMAND (segment_manager_show_command, static) = |
| { |
| .path = "show segment-manager", |
| .short_help = "show segment-manager [segments][verbose]", |
| .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, "%-40s%-20s%-15s%-10s", "Connection", "App", |
| "API Client", "SegManager"); |
| else |
| vlib_cli_output (vm, "%-40s%-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, "%-40v%-20v%-15u%-10u", str, app_name, |
| app_wrk->api_client_index, |
| app_wrk->connects_seg_manager); |
| else |
| s = format (s, "%-40v%-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: |
| */ |