*/
segment_manager_t *segment_managers = 0;
+/*
+ * Pool of segment manager properties
+ */
+static segment_manager_properties_t *segment_manager_properties_pool;
+
/**
* Process private segment index
*/
u32 default_fifo_size = 1 << 16;
u32 default_segment_size = 1 << 20;
+segment_manager_properties_t *
+segment_manager_properties_alloc (void)
+{
+ segment_manager_properties_t *props;
+ pool_get (segment_manager_properties_pool, props);
+ memset (props, 0, sizeof (*props));
+ return props;
+}
+
+void
+segment_manager_properties_free (segment_manager_properties_t * props)
+{
+ pool_put (segment_manager_properties_pool, props);
+ memset (props, 0xFB, sizeof (*props));
+}
+
+segment_manager_properties_t *
+segment_manager_properties_get (u32 smp_index)
+{
+ if (pool_is_free_index (segment_manager_properties_pool, smp_index))
+ return 0;
+ return pool_elt_at_index (segment_manager_properties_pool, smp_index);
+}
+
+u32
+segment_manager_properties_index (segment_manager_properties_t * p)
+{
+ return p - segment_manager_properties_pool;
+}
+
void
segment_manager_get_segment_info (u32 index, u8 ** name, u32 * size)
{
svm_fifo_segment_private_t *s;
- s = svm_fifo_get_segment (index);
+ s = svm_fifo_segment_get_segment (index);
*name = s->h->segment_name;
*size = s->ssvm.ssvm_size;
}
u8 * segment_name)
{
svm_fifo_segment_create_args_t _ca, *ca = &_ca;
+ segment_manager_properties_t *props;
int rv;
memset (ca, 0, sizeof (*ca));
-
- 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)
+ props = segment_manager_properties_get (sm->properties_index);
+ if (!props->use_private_segment)
{
- clib_warning ("svm_fifo_segment_create ('%s', %d) failed",
- ca->segment_name, ca->segment_size);
- return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL;
+ ca->segment_name = (char *) segment_name;
+ ca->segment_size = segment_size;
+ ca->rx_fifo_size = props->rx_fifo_size;
+ ca->tx_fifo_size = props->tx_fifo_size;
+ ca->preallocated_fifo_pairs = props->preallocated_fifo_pairs;
+
+ rv = svm_fifo_segment_create (ca);
+ if (rv)
+ {
+ clib_warning ("svm_fifo_segment_create ('%s', %d) failed",
+ ca->segment_name, ca->segment_size);
+ return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL;
+ }
}
+ else
+ {
+ u32 rx_fifo_size, tx_fifo_size, rx_rounded_data_size,
+ tx_rounded_data_size;
+ u32 approx_segment_count;
+ u64 approx_total_size;
+
+ ca->segment_name = "process-private-segment";
+ ca->segment_size = segment_size;
+ ca->rx_fifo_size = props->rx_fifo_size;
+ ca->tx_fifo_size = props->tx_fifo_size;
+ ca->preallocated_fifo_pairs = props->preallocated_fifo_pairs;
+ ca->private_segment_count = props->private_segment_count;
+
+ /* Calculate space requirements */
+ rx_rounded_data_size = (1 << (max_log2 (ca->rx_fifo_size)));
+ tx_rounded_data_size = (1 << (max_log2 (ca->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;
+
+ approx_total_size = (u64) ca->preallocated_fifo_pairs
+ * (rx_fifo_size + tx_fifo_size);
+ approx_segment_count = (approx_total_size + (ca->segment_size - 1))
+ / (u64) ca->segment_size;
+
+ /* The user asked us to figure it out... */
+ if (ca->private_segment_count == 0)
+ {
+ ca->private_segment_count = approx_segment_count;
+ }
+ /* Follow directions, but issue a warning */
+ else if (approx_segment_count != ca->private_segment_count)
+ {
+ clib_warning ("Honoring segment count %u, calculated count was %u",
+ ca->private_segment_count, approx_segment_count);
+ }
+
+ if (svm_fifo_segment_create_process_private (ca))
+ clib_warning ("Failed to create process private segment");
+ ASSERT (vec_len (ca->new_segment_indices));
+ }
vec_append (sm->segment_indices, ca->new_segment_indices);
vec_free (ca->new_segment_indices);
-
return 0;
}
int
session_manager_add_segment (segment_manager_t * sm)
{
- u8 *segment_name;
svm_fifo_segment_create_args_t _ca, *ca = &_ca;
+ segment_manager_properties_t *props;
u32 add_segment_size;
+ u8 *segment_name;
int rv;
memset (ca, 0, sizeof (*ca));
+ props = segment_manager_properties_get (sm->properties_index);
segment_name = format (0, "%d-%d%c", getpid (), segment_name_counter++, 0);
- add_segment_size = sm->properties->add_segment_size ?
- sm->properties->add_segment_size : default_segment_size;
+ add_segment_size = props->add_segment_size ?
+ props->add_segment_size : default_segment_size;
rv = session_manager_add_segment_i (sm, add_segment_size, segment_name);
vec_free (segment_name);
return rv;
}
-static void
- segment_manager_alloc_process_private_segment
- (segment_manager_properties_t * props)
+segment_manager_t *
+segment_manager_new ()
{
- svm_fifo_segment_create_args_t _a, *a = &_a;
-
- if (private_segment_indices)
- return;
-
- memset (a, 0, sizeof (*a));
- a->segment_name = "process-private-segment";
- a->segment_size = ~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;
- a->private_segment_count = props->private_segment_count;
- a->private_segment_size = props->private_segment_size;
-
- if (svm_fifo_segment_create_process_private (a))
- clib_warning ("Failed to create process private segment");
-
- private_segment_indices = a->new_segment_indices;
- ASSERT (vec_len (private_segment_indices));
+ segment_manager_t *sm;
+ pool_get (segment_managers, sm);
+ memset (sm, 0, sizeof (*sm));
+ return sm;
}
/**
* Returns error if svm segment allocation fails.
*/
int
-segment_manager_init (segment_manager_t * sm,
- segment_manager_properties_t * properties,
+segment_manager_init (segment_manager_t * sm, u32 props_index,
u32 first_seg_size)
{
int rv;
/* app allocates these */
- sm->properties = properties;
-
+ sm->properties_index = props_index;
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)
- {
- clib_warning ("Failed to allocate segment");
- return rv;
- }
- }
- else
+ rv = session_manager_add_first_segment (sm, first_seg_size);
+ if (rv)
{
- if (vec_len (private_segment_indices) == 0)
- segment_manager_alloc_process_private_segment (properties);
- ASSERT (vec_len (private_segment_indices));
- vec_append (sm->segment_indices, private_segment_indices);
+ clib_warning ("Failed to allocate segment");
+ return rv;
}
clib_spinlock_init (&sm->lockp);
return 0;
}
+u8
+segment_manager_has_fifos (segment_manager_t * sm)
+{
+ svm_fifo_segment_private_t *segment;
+ int i;
+
+ for (i = 0; i < vec_len (sm->segment_indices); i++)
+ {
+ segment = svm_fifo_segment_get_segment (sm->segment_indices[i]);
+ if (CLIB_DEBUG && i && !svm_fifo_segment_has_fifos (segment)
+ && !(segment->h->flags & FIFO_SEGMENT_F_IS_PREALLOCATED))
+ clib_warning ("segment %d has no fifos!", sm->segment_indices[i]);
+ if (svm_fifo_segment_has_fifos (segment))
+ return 1;
+ }
+ return 0;
+}
+
+static u8
+segment_manager_app_detached (segment_manager_t * sm)
+{
+ return (sm->app_index == SEGMENT_MANAGER_INVALID_APP_INDEX);
+}
+
void
-segment_manager_first_segment_maybe_del (segment_manager_t * sm)
+segment_manager_app_detach (segment_manager_t * sm)
{
- svm_fifo_segment_private_t *fifo_segment;
+ sm->app_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
+}
- /* If the first semgment has no fifos, then delete the 1st segment
- */
- fifo_segment = svm_fifo_get_segment (sm->segment_indices[0]);
- if (!svm_fifo_segment_has_fifos (fifo_segment))
+static void
+segment_manager_del_segment (segment_manager_t * sm, u32 segment_index)
+{
+ svm_fifo_segment_private_t *fifo_segment;
+ u32 svm_segment_index;
+ clib_spinlock_lock (&sm->lockp);
+ svm_segment_index = sm->segment_indices[segment_index];
+ fifo_segment = svm_fifo_segment_get_segment (svm_segment_index);
+ if (!fifo_segment
+ || ((fifo_segment->h->flags & FIFO_SEGMENT_F_IS_PREALLOCATED)
+ && !segment_manager_app_detached (sm)))
{
- clib_spinlock_lock (&sm->lockp);
- svm_fifo_segment_delete (fifo_segment);
- vec_del1 (sm->segment_indices, 0);
clib_spinlock_unlock (&sm->lockp);
+ return;
}
+ svm_fifo_segment_delete (fifo_segment);
+ vec_del1 (sm->segment_indices, segment_index);
+ clib_spinlock_unlock (&sm->lockp);
}
- /**
- * Removes segment manager.
- *
- * Since the fifos allocated in the segment keep backpointers to the sessions
- * prior to removing the segment, we call session disconnect. This
- * subsequently propages into transport.
+/**
+ * Initiate disconnects for all sessions 'owned' by a segment manager
*/
void
-segment_manager_del (segment_manager_t * sm)
+segment_manager_del_sessions (segment_manager_t * sm)
{
int j;
svm_fifo_segment_private_t *fifo_segment;
+ svm_fifo_t *fifo;
+
ASSERT (vec_len (sm->segment_indices));
/* Across all fifo segments used by the server */
for (j = 0; j < vec_len (sm->segment_indices); j++)
{
- svm_fifo_t *fifo;
-
- /* Vector of fifos allocated in the segment */
- fifo_segment = svm_fifo_get_segment (sm->segment_indices[j]);
+ fifo_segment = svm_fifo_segment_get_segment (sm->segment_indices[j]);
fifo = svm_fifo_segment_get_fifo_list (fifo_segment);
/*
session_index = fifo->master_session_index;
thread_index = fifo->master_thread_index;
-
- session = stream_session_get (session_index, thread_index);
+ session = session_get (session_index, thread_index);
/* Instead of directly removing the session call disconnect */
- session->session_state = SESSION_STATE_CLOSED;
- session_send_session_evt_to_thread (stream_session_handle (session),
- FIFO_EVENT_DISCONNECT,
- thread_index);
+ if (session->session_state != SESSION_STATE_CLOSED)
+ {
+ session->session_state = SESSION_STATE_CLOSED;
+ session_send_session_evt_to_thread (session_handle
+ (session),
+ FIFO_EVENT_DISCONNECT,
+ thread_index);
+ }
fifo = fifo->next;
}
* sessions if the segment can be removed.
*/
}
+}
- segment_manager_first_segment_maybe_del (sm);
+/**
+ * Removes segment manager.
+ *
+ * Since the fifos allocated in the segment keep backpointers to the sessions
+ * prior to removing the segment, we call session disconnect. This
+ * subsequently propagates into transport.
+ */
+void
+segment_manager_del (segment_manager_t * sm)
+{
+ int i;
+ ASSERT (!segment_manager_has_fifos (sm)
+ && segment_manager_app_detached (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. */
+ for (i = vec_len (sm->segment_indices) - 1; i >= 0; i--)
+ {
+ if (CLIB_DEBUG)
+ {
+ svm_fifo_segment_private_t *segment;
+ segment = svm_fifo_segment_get_segment (sm->segment_indices[i]);
+ ASSERT (!svm_fifo_segment_has_fifos (segment));
+ }
+ segment_manager_del_segment (sm, i);
+ }
clib_spinlock_free (&sm->lockp);
+ if (CLIB_DEBUG)
+ memset (sm, 0xfe, sizeof (*sm));
pool_put (segment_managers, sm);
}
-static int
-segment_manager_notify_app_seg_add (segment_manager_t * sm,
- u32 fifo_segment_index)
+void
+segment_manager_init_del (segment_manager_t * sm)
{
- application_t *app = application_get (sm->app_index);
- u32 seg_size = 0;
- u8 *seg_name;
-
- /* Send an API message to the external app, to map new segment */
- ASSERT (app->cb_fns.add_segment_callback);
-
- segment_manager_get_segment_info (fifo_segment_index, &seg_name, &seg_size);
- return app->cb_fns.add_segment_callback (app->api_client_index, seg_name,
- seg_size);
+ 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_del (sm);
+ }
}
int
u32 * fifo_segment_index)
{
svm_fifo_segment_private_t *fifo_segment;
+ segment_manager_properties_t *props;
u32 fifo_size, sm_index;
u8 added_a_segment = 0;
int i;
clib_spinlock_lock (&sm->lockp);
/* Allocate svm fifos */
+ props = segment_manager_properties_get (sm->properties_index);
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);
+ fifo_segment = svm_fifo_segment_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 = props->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,
FIFO_SEGMENT_RX_FREELIST);
- /* FC: cleanup, make sure sm->properties->xxx_fifo_size always set */
- fifo_size = sm->properties->tx_fifo_size;
+ fifo_size = props->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,
/* See if we're supposed to create another segment */
if (*server_rx_fifo == 0)
{
- if (sm->properties->add_segment && !sm->properties->use_private_segment)
+ if (props->add_segment && !props->use_private_segment)
{
if (added_a_segment)
{
- clib_warning ("added a segment, still cant allocate a fifo");
+ clib_warning ("added a segment, still can't allocate a fifo");
clib_spinlock_unlock (&sm->lockp);
return SESSION_ERROR_NEW_SEG_NO_SPACE;
}
clib_spinlock_unlock (&sm->lockp);
if (added_a_segment)
- return segment_manager_notify_app_seg_add (sm, *fifo_segment_index);
+ return application_add_segment_notify (sm->app_index,
+ *fifo_segment_index);
return 0;
}
{
segment_manager_t *sm;
svm_fifo_segment_private_t *fifo_segment;
+ u32 i, segment_index = ~0;
+ u8 is_first;
sm = segment_manager_get_if_valid (rx_fifo->segment_manager);
/* It's possible to have no segment manager if the session was removed
- * as result of a detach */
+ * as result of a detach. */
if (!sm)
return;
- fifo_segment = svm_fifo_get_segment (svm_segment_index);
+ fifo_segment = svm_fifo_segment_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);
- /* Don't try to delete process-private segments */
- if (sm->properties->private_segment_count > 0)
- return;
-
- /* 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))
+ /*
+ * 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 (!svm_fifo_segment_has_fifos (fifo_segment))
{
- clib_spinlock_lock (&sm->lockp);
- svm_fifo_segment_delete (fifo_segment);
- vec_del1 (sm->segment_indices, svm_segment_index);
- clib_spinlock_unlock (&sm->lockp);
+ is_first = sm->segment_indices[0] == svm_segment_index;
+
+ /* Remove segment if it holds no fifos or first but not protected */
+ if (!is_first || !sm->first_is_protected)
+ {
+ /* Find the segment manager segment index */
+ for (i = 0; i < vec_len (sm->segment_indices); i++)
+ if (sm->segment_indices[i] == svm_segment_index)
+ {
+ segment_index = i;
+ break;
+ }
+ ASSERT (segment_index != (u32) ~ 0);
+ segment_manager_del_segment (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_del (sm);
}
}
/**
* Allocates shm queue in the first segment
*/
-unix_shared_memory_queue_t *
+svm_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;
+ svm_queue_t *q;
void *oldheap;
ASSERT (sm->segment_indices != 0);
- segment = svm_fifo_get_segment (sm->segment_indices[0]);
+ segment = svm_fifo_segment_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 */ );
+ q = svm_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)
+segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q)
{
ssvm_shared_header_t *sh;
svm_fifo_segment_private_t *segment;
ASSERT (sm->segment_indices != 0);
- segment = svm_fifo_get_segment (sm->segment_indices[0]);
+ segment = svm_fifo_segment_get_segment (sm->segment_indices[0]);
sh = segment->ssvm.sh;
oldheap = ssvm_push_heap (sh);
- unix_shared_memory_queue_free (q);
+ svm_queue_free (q);
ssvm_pop_heap (oldheap);
}
+static clib_error_t *
+segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ svm_fifo_segment_private_t *segments, *seg;
+ segment_manager_t *sm;
+ u8 show_segments = 0, verbose = 0, *name;
+ uword address;
+ u64 size;
+ u32 active_fifos;
+ u32 free_fifos;
+
+ mheap_t *heap_header;
+
+ 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 (segment_managers));
+ if (verbose && pool_elts (segment_managers))
+ {
+ vlib_cli_output (vm, "%-10s%=15s%=12s", "Index", "App Index",
+ "Segments");
+
+ /* *INDENT-OFF* */
+ pool_foreach (sm, segment_managers, ({
+ vlib_cli_output (vm, "%-10d%=15d%=12d", segment_manager_index(sm),
+ sm->app_index, vec_len (sm->segment_indices));
+ }));
+ /* *INDENT-ON* */
+
+ }
+ if (show_segments)
+ {
+ segments = svm_fifo_segment_segments_pool ();
+ vlib_cli_output (vm, "%d svm fifo segments allocated",
+ pool_elts (segments));
+ vlib_cli_output (vm, "%-25s%15s%16s%16s%16s", "Name",
+ "HeapSize (M)", "ActiveFifos", "FreeFifos", "Address");
+
+ /* *INDENT-OFF* */
+ pool_foreach (seg, segments, ({
+ if (seg->h->flags & FIFO_SEGMENT_F_IS_PRIVATE)
+ {
+ address = pointer_to_uword (seg->ssvm.sh->heap);
+ if (seg->h->flags & FIFO_SEGMENT_F_IS_MAIN_HEAP)
+ name = format (0, "main heap");
+ else
+ name = format (0, "private heap");
+ heap_header = mheap_header (seg->ssvm.sh->heap);
+ size = heap_header->max_size;
+ }
+ else
+ {
+ address = seg->ssvm.sh->ssvm_va;
+ size = seg->ssvm.ssvm_size;
+ name = seg->ssvm.sh->name;
+ }
+ active_fifos = svm_fifo_segment_num_fifos (seg);
+ free_fifos = svm_fifo_segment_num_free_fifos (seg, ~0 /* size */);
+ vlib_cli_output (vm, "%-25v%15llu%16u%16u%16llx",
+ name, size >> 20ULL, active_fifos, free_fifos,
+ address);
+ if (verbose)
+ vlib_cli_output (vm, "%U",
+ format_svm_fifo_segment, seg, verbose);
+ if (seg->h->flags & FIFO_SEGMENT_F_IS_PRIVATE)
+ vec_free (name);
+ }));
+ /* *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* */
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff