*/
segment_manager_t *segment_managers = 0;
+/**
+ * Process private segment index
+ */
+u32 private_segment_index = ~0;
+
/**
* Default fifo and segment size. TODO config.
*/
ca->segment_name = (char *) segment_name;
ca->segment_size = segment_size;
+ ca->rx_fifo_size = sm->properties->rx_fifo_size;
+ ca->tx_fifo_size = sm->properties->tx_fifo_size;
+ ca->preallocated_fifo_pairs = sm->properties->preallocated_fifo_pairs;
rv = svm_fifo_segment_create (ca);
if (rv)
int
session_manager_add_first_segment (segment_manager_t * sm, u32 segment_size)
{
- svm_fifo_segment_create_args_t _ca, *ca = &_ca;
u8 *segment_name;
int rv;
- memset (ca, 0, sizeof (*ca));
segment_name = format (0, "%d-%d%c", getpid (), segment_name_counter++, 0);
rv = session_manager_add_segment_i (sm, segment_size, segment_name);
vec_free (segment_name);
return rv;
}
+static void
+ segment_manager_alloc_process_private_segment
+ (segment_manager_properties_t * props)
+{
+ svm_fifo_segment_create_args_t _a, *a = &_a;
+
+ if (private_segment_index != ~0)
+ return;
+
+ memset (a, 0, sizeof (*a));
+ a->segment_name = "process-private-segment";
+ a->segment_size = ~0;
+ a->new_segment_index = ~0;
+ a->rx_fifo_size = props->rx_fifo_size;
+ a->tx_fifo_size = props->tx_fifo_size;
+ a->preallocated_fifo_pairs = props->preallocated_fifo_pairs;
+
+ if (svm_fifo_segment_create_process_private (a))
+ clib_warning ("Failed to create process private segment");
+
+ private_segment_index = a->new_segment_index;
+ ASSERT (private_segment_index != ~0);
+}
+
/**
* Initializes segment manager based on options provided.
* Returns error if svm segment allocation fails.
/* app allocates these */
sm->properties = properties;
- if (first_seg_size > 0)
+ first_seg_size = first_seg_size > 0 ? first_seg_size : default_segment_size;
+
+ if (sm->properties->use_private_segment == 0)
{
rv = session_manager_add_first_segment (sm, first_seg_size);
if (rv)
return rv;
}
}
+ else
+ {
+ if (private_segment_index == ~0)
+ segment_manager_alloc_process_private_segment (properties);
+ ASSERT (private_segment_index != ~0);
+ vec_add1 (sm->segment_indices, private_segment_index);
+ }
+ clib_spinlock_init (&sm->lockp);
return 0;
}
void
segment_manager_del (segment_manager_t * sm)
{
- u32 *deleted_sessions = 0;
- u32 *deleted_thread_indices = 0;
- int i, j;
+ int j;
/* Across all fifo segments used by the server */
for (j = 0; j < vec_len (sm->segment_indices); j++)
{
svm_fifo_segment_private_t *fifo_segment;
- svm_fifo_t **fifos;
+ svm_fifo_t *fifo;
+
/* Vector of fifos allocated in the segment */
fifo_segment = svm_fifo_get_segment (sm->segment_indices[j]);
- fifos = svm_fifo_segment_get_fifos (fifo_segment);
+ fifo = svm_fifo_segment_get_fifo_list (fifo_segment);
/*
* 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.
*/
- for (i = 0; i < vec_len (fifos); i++)
+ while (fifo)
{
- svm_fifo_t *fifo;
u32 session_index, thread_index;
stream_session_t *session;
- fifo = fifos[i];
- session_index = fifo->server_session_index;
- thread_index = fifo->server_thread_index;
+ session_index = fifo->master_session_index;
+ thread_index = fifo->master_thread_index;
session = stream_session_get (session_index, thread_index);
- /* Add to the deleted_sessions vector (once!) */
- if (!session->is_deleted)
- {
- session->is_deleted = 1;
- vec_add1 (deleted_sessions, session_index);
- vec_add1 (deleted_thread_indices, thread_index);
- }
- }
-
- for (i = 0; i < vec_len (deleted_sessions); i++)
- {
- stream_session_t *session;
- session = stream_session_get (deleted_sessions[i],
- deleted_thread_indices[i]);
-
/* Instead of directly removing the session call disconnect */
- stream_session_disconnect (session);
-
- /*
- stream_session_table_del (smm, session);
- pool_put(smm->sessions[deleted_thread_indices[i]], session);
- */
+ session_send_session_evt_to_thread (stream_session_handle (session),
+ FIFO_EVENT_DISCONNECT,
+ thread_index);
+ fifo = fifo->next;
}
- vec_reset_length (deleted_sessions);
- vec_reset_length (deleted_thread_indices);
-
- /* Instead of removing the segment, test when removing the session if
- * the segment can be removed
+ /* Instead of removing the segment, test when cleaning up disconnected
+ * sessions if the segment can be removed.
*/
- /* svm_fifo_segment_delete (fifo_segment); */
}
- vec_free (deleted_sessions);
- vec_free (deleted_thread_indices);
+ clib_spinlock_free (&sm->lockp);
pool_put (segment_managers, sm);
}
u8 added_a_segment = 0;
int i;
- /* Allocate svm fifos */
ASSERT (vec_len (sm->segment_indices));
+ /* Make sure we don't have multiple threads trying to allocate segments
+ * at the same time. */
+ clib_spinlock_lock (&sm->lockp);
+
+ /* Allocate svm fifos */
again:
for (i = 0; i < vec_len (sm->segment_indices); i++)
{
*fifo_segment_index = sm->segment_indices[i];
fifo_segment = svm_fifo_get_segment (*fifo_segment_index);
+ /* FC: cleanup, make sure sm->properties->xxx_fifo_size always set */
fifo_size = sm->properties->rx_fifo_size;
fifo_size = (fifo_size == 0) ? default_fifo_size : fifo_size;
- *server_rx_fifo = svm_fifo_segment_alloc_fifo (fifo_segment, fifo_size);
+ *server_rx_fifo =
+ svm_fifo_segment_alloc_fifo (fifo_segment, fifo_size,
+ FIFO_SEGMENT_RX_FREELIST);
+ /* FC: cleanup, make sure sm->properties->xxx_fifo_size always set */
fifo_size = sm->properties->tx_fifo_size;
fifo_size = (fifo_size == 0) ? default_fifo_size : fifo_size;
- *server_tx_fifo = svm_fifo_segment_alloc_fifo (fifo_segment, fifo_size);
+ *server_tx_fifo =
+ svm_fifo_segment_alloc_fifo (fifo_segment, fifo_size,
+ FIFO_SEGMENT_TX_FREELIST);
if (*server_rx_fifo == 0)
{
/* This would be very odd, but handle it... */
if (*server_tx_fifo != 0)
{
- svm_fifo_segment_free_fifo (fifo_segment, *server_tx_fifo);
+ svm_fifo_segment_free_fifo (fifo_segment, *server_tx_fifo,
+ FIFO_SEGMENT_TX_FREELIST);
*server_tx_fifo = 0;
}
continue;
{
if (*server_rx_fifo != 0)
{
- svm_fifo_segment_free_fifo (fifo_segment, *server_rx_fifo);
+ svm_fifo_segment_free_fifo (fifo_segment, *server_rx_fifo,
+ FIFO_SEGMENT_RX_FREELIST);
*server_rx_fifo = 0;
}
continue;
}
if (session_manager_add_segment (sm))
- return VNET_API_ERROR_URI_FIFO_CREATE_FAILED;
+ {
+ return VNET_API_ERROR_URI_FIFO_CREATE_FAILED;
+ }
added_a_segment = 1;
goto again;
}
}
- if (added_a_segment)
- return segment_manager_notify_app_seg_add (sm, *fifo_segment_index);
-
/* Backpointers to segment manager */
sm_index = segment_manager_index (sm);
(*server_tx_fifo)->segment_manager = sm_index;
(*server_rx_fifo)->segment_manager = sm_index;
+ clib_spinlock_unlock (&sm->lockp);
+
+ if (added_a_segment)
+ return segment_manager_notify_app_seg_add (sm, *fifo_segment_index);
+
return 0;
}
segment_manager_t *sm;
svm_fifo_segment_private_t *fifo_segment;
- fifo_segment = svm_fifo_get_segment (svm_segment_index);
- svm_fifo_segment_free_fifo (fifo_segment, rx_fifo);
- svm_fifo_segment_free_fifo (fifo_segment, tx_fifo);
+ sm = segment_manager_get_if_valid (rx_fifo->segment_manager);
- /* If we have segment manager, try doing some cleanup.
- * It's possible to have no segment manager if the session was removed
+ /* It's possible to have no segment manager if the session was removed
* as result of a detach */
- sm = segment_manager_get_if_valid (rx_fifo->segment_manager);
- if (sm)
+ if (!sm)
+ return;
+
+ fifo_segment = svm_fifo_get_segment (svm_segment_index);
+ svm_fifo_segment_free_fifo (fifo_segment, rx_fifo,
+ FIFO_SEGMENT_RX_FREELIST);
+ svm_fifo_segment_free_fifo (fifo_segment, tx_fifo,
+ FIFO_SEGMENT_TX_FREELIST);
+
+ /* Remove segment only if it holds no fifos and not the first */
+ if (sm->segment_indices[0] != svm_segment_index
+ && !svm_fifo_segment_has_fifos (fifo_segment))
{
- /* Remove segment only if it holds no fifos and not the first */
- if (sm->segment_indices[0] != svm_segment_index
- && !svm_fifo_segment_has_fifos (fifo_segment))
- {
- svm_fifo_segment_delete (fifo_segment);
- vec_del1 (sm->segment_indices, svm_segment_index);
- }
+ svm_fifo_segment_delete (fifo_segment);
+ vec_del1 (sm->segment_indices, svm_segment_index);
}
}
+/**
+ * Allocates shm queue in the first segment
+ */
+unix_shared_memory_queue_t *
+segment_manager_alloc_queue (segment_manager_t * sm, u32 queue_size)
+{
+ ssvm_shared_header_t *sh;
+ svm_fifo_segment_private_t *segment;
+ unix_shared_memory_queue_t *q;
+ void *oldheap;
+
+ ASSERT (sm->segment_indices != 0);
+
+ segment = svm_fifo_get_segment (sm->segment_indices[0]);
+ sh = segment->ssvm.sh;
+
+ oldheap = ssvm_push_heap (sh);
+ q =
+ unix_shared_memory_queue_init (queue_size, sizeof (session_fifo_event_t),
+ 0 /* consumer pid */ , 0
+ /* signal when queue non-empty */ );
+ ssvm_pop_heap (oldheap);
+ return q;
+}
+
+/**
+ * Frees shm queue allocated in the first segment
+ */
+void
+segment_manager_dealloc_queue (segment_manager_t * sm,
+ unix_shared_memory_queue_t * q)
+{
+ ssvm_shared_header_t *sh;
+ svm_fifo_segment_private_t *segment;
+ void *oldheap;
+
+ ASSERT (sm->segment_indices != 0);
+
+ segment = svm_fifo_get_segment (sm->segment_indices[0]);
+ sh = segment->ssvm.sh;
+
+ oldheap = ssvm_push_heap (sh);
+ unix_shared_memory_queue_free (q);
+ ssvm_pop_heap (oldheap);
+}
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff