#include <vnet/session/session_lookup.h>
#include <vnet/session/session_debug.h>
#include <svm/message_queue.h>
-#include <svm/ssvm.h>
+#include <svm/fifo_segment.h>
+#include <vlib/dma/dma.h>
#define foreach_session_input_error \
_(NO_SESSION, "No session drops") \
_(FIFO_FULL, "Packets dropped for lack of rx fifo space") \
_(EVENT_FIFO_FULL, "Events not sent for lack of event fifo space") \
_(API_QUEUE_FULL, "Sessions not created for lack of API queue space") \
-_(NEW_SEG_NO_SPACE, "Created segment, couldn't allocate a fifo pair") \
-_(NO_SPACE, "Couldn't allocate a fifo pair") \
-_(SEG_CREATE, "Couldn't create a new segment")
typedef enum
{
foreach_session_input_error
#undef _
SESSION_N_ERROR,
-} session_error_t;
+} session_input_error_t;
typedef struct session_tx_context_
{
session_t *s;
transport_proto_vft_t *transport_vft;
transport_connection_t *tc;
+ transport_send_params_t sp;
u32 max_dequeue;
- u32 snd_space;
u32 left_to_snd;
- u32 tx_offset;
u32 max_len_to_snd;
u16 deq_per_first_buf;
u16 deq_per_buf;
- u16 snd_mss;
u16 n_segs_per_evt;
+ u16 n_bufs_needed;
u8 n_bufs_per_seg;
CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
session_dgram_hdr_t hdr;
+
+ /** Vector of tx buffer free lists */
+ u32 *tx_buffers;
+ vlib_buffer_t **transport_pending_bufs;
} session_tx_context_t;
typedef struct session_evt_elt
u8 data[SESSION_CTRL_MSG_MAX_SIZE];
} session_evt_ctrl_data_t;
+typedef enum session_wrk_state_
+{
+ SESSION_WRK_POLLING,
+ SESSION_WRK_INTERRUPT,
+ SESSION_WRK_IDLE,
+} __clib_packed session_wrk_state_t;
+
+typedef enum session_wrk_flags_
+{
+ SESSION_WRK_F_ADAPTIVE = 1 << 0,
+} __clib_packed session_wrk_flag_t;
+
+#define DMA_TRANS_SIZE 1024
+typedef struct
+{
+ u32 *pending_tx_buffers;
+ u16 *pending_tx_nexts;
+} session_dma_transfer;
+
typedef struct session_worker_
{
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
svm_msg_q_t *vpp_event_queue;
/** vlib_time_now last time around the track */
- f64 last_vlib_time;
+ clib_time_type_t last_vlib_time;
+
+ /** vlib_time_now rounded to us precision and as u64 */
+ clib_us_time_t last_vlib_us_time;
/** Convenience pointer to this worker's vlib_main */
vlib_main_t *vm;
/** Per-proto vector of sessions to enqueue */
- u32 *session_to_enqueue[TRANSPORT_N_PROTO];
+ u32 **session_to_enqueue;
+
+ /** Timerfd used to periodically signal wrk session queue node */
+ int timerfd;
+
+ /** Worker flags */
+ session_wrk_flag_t flags;
+
+ /** Worker state */
+ session_wrk_state_t state;
/** Context for session tx */
session_tx_context_t ctx;
- /** Vector of tx buffer free lists */
- u32 *tx_buffers;
-
/** Pool of session event list elements */
session_evt_elt_t *event_elts;
/** Head of list of pending events */
clib_llist_index_t old_head;
- /** Peekers rw lock */
- clib_rwlock_t peekers_rw_locks;
-
/** Vector of buffers to be sent */
u32 *pending_tx_buffers;
/** Vector of nexts for the pending tx buffers */
u16 *pending_tx_nexts;
+ /** Clib file for timerfd. Used only if adaptive mode is on */
+ uword timerfd_file;
+
+ /** List of pending connects for first worker */
+ clib_llist_index_t pending_connects;
+
+ /** Flag that is set if main thread signaled to handle connects */
+ u32 n_pending_connects;
+
+ /** Main thread loops in poll mode without a connect */
+ u32 no_connect_loops;
+
+ /** List head for first worker evts pending handling on main */
+ clib_llist_index_t evts_pending_main;
+
+ int config_index;
+ u8 dma_enabled;
+ session_dma_transfer *dma_trans;
+ u16 trans_head;
+ u16 trans_tail;
+ u16 trans_size;
+ u16 batch_num;
+ vlib_dma_batch_t *batch;
+
#if SESSION_DEBUG
/** last event poll time by thread */
- f64 last_event_poll;
+ clib_time_type_t last_event_poll;
#endif
} session_worker_t;
u8 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e);
+typedef void (*session_update_time_fn) (f64 time_now, u8 thread_index);
+
typedef struct session_main_
{
/** Worker contexts */
session_worker_t *wrk;
- /** Event queues memfd segment initialized only if so configured */
- ssvm_private_t evt_qs_segment;
+ /** Vector of transport update time functions */
+ session_update_time_fn *update_time_fns;
+
+ /** Event queues memfd segment */
+ fifo_segment_t wrk_mqs_segment;
/** Unique segment name counter */
u32 unique_segment_name_counter;
* Trade memory for speed, for now */
u32 *session_type_to_next;
+ /** Thread for cl and ho that rely on cl allocs */
+ u32 transport_cl_thread;
+
+ transport_proto_t last_transport_proto_type;
+
+ /** Number of workers at pool realloc barrier */
+ volatile u32 pool_realloc_at_barrier;
+
+ /** Number of workers doing reallocs */
+ volatile u32 pool_realloc_doing_work;
+
+ /** Lock to synchronize parallel forced reallocs */
+ clib_spinlock_t pool_realloc_lock;
+
/*
* Config parameters
*/
/** Session manager is enabled */
u8 is_enabled;
+ /** Session manager initialized (not necessarily enabled) */
+ u8 is_initialized;
+
+ /** Enable session manager at startup */
+ u8 session_enable_asap;
+
+ /** Poll session node in main thread */
+ u8 poll_main;
+
+ /** Allocate private rx mqs for external apps */
+ u8 use_private_rx_mqs;
+
+ /** Do not enable session queue node adaptive mode */
+ u8 no_adaptive;
+
/** vpp fifo event queue configured length */
- u32 configured_event_queue_length;
+ u32 configured_wrk_mq_length;
/** Session ssvm segment configs*/
- uword session_baseva;
- uword session_va_space_size;
- uword evt_qs_segment_size;
- u8 evt_qs_use_memfd_seg;
+ uword wrk_mqs_segment_size;
+
+ /** Session enable dma*/
+ u8 dma_enabled;
/** Session table size parameters */
u32 configured_v4_session_table_buckets;
/** Preallocate session config parameter */
u32 preallocated_sessions;
+ u16 msg_id_base;
} session_main_t;
extern session_main_t session_main;
extern vlib_node_registration_t session_queue_process_node;
extern vlib_node_registration_t session_queue_pre_input_node;
-#define SESSION_Q_PROCESS_FLUSH_FRAMES 1
-#define SESSION_Q_PROCESS_STOP 2
-
-static inline session_evt_elt_t *
-session_evt_elt_alloc (session_worker_t * wrk)
+typedef enum session_q_process_evt_
{
- session_evt_elt_t *elt;
- pool_get (wrk->event_elts, elt);
- return elt;
-}
+ SESSION_Q_PROCESS_RUN_ON_MAIN = 1,
+ SESSION_Q_PROCESS_STOP
+} session_q_process_evt_t;
-static inline void
-session_evt_elt_free (session_worker_t * wrk, session_evt_elt_t * elt)
-{
- pool_put (wrk->event_elts, elt);
-}
+#define TRANSPORT_PROTO_INVALID (session_main.last_transport_proto_type + 1)
+#define TRANSPORT_N_PROTOS (session_main.last_transport_proto_type + 1)
static inline void
session_evt_add_old (session_worker_t * wrk, session_evt_elt_t * elt)
{
clib_llist_add_tail (wrk->event_elts, evt_list, elt,
- pool_elt_at_index (wrk->event_elts, wrk->old_head));
+ clib_llist_elt (wrk->event_elts, wrk->old_head));
}
static inline void
session_evt_add_head_old (session_worker_t * wrk, session_evt_elt_t * elt)
{
clib_llist_add (wrk->event_elts, evt_list, elt,
- pool_elt_at_index (wrk->event_elts, wrk->old_head));
+ clib_llist_elt (wrk->event_elts, wrk->old_head));
}
session_evt_alloc_ctrl (session_worker_t * wrk)
{
session_evt_elt_t *elt;
- elt = session_evt_elt_alloc (wrk);
+ clib_llist_get (wrk->event_elts, elt);
clib_llist_add_tail (wrk->event_elts, evt_list, elt,
- pool_elt_at_index (wrk->event_elts, wrk->ctrl_head));
+ clib_llist_elt (wrk->event_elts, wrk->ctrl_head));
return elt;
}
session_evt_alloc_new (session_worker_t * wrk)
{
session_evt_elt_t *elt;
- elt = session_evt_elt_alloc (wrk);
+ clib_llist_get (wrk->event_elts, elt);
clib_llist_add_tail (wrk->event_elts, evt_list, elt,
- pool_elt_at_index (wrk->event_elts, wrk->new_head));
+ clib_llist_elt (wrk->event_elts, wrk->new_head));
return elt;
}
session_evt_alloc_old (session_worker_t * wrk)
{
session_evt_elt_t *elt;
- elt = session_evt_elt_alloc (wrk);
+ clib_llist_get (wrk->event_elts, elt);
clib_llist_add_tail (wrk->event_elts, evt_list, elt,
- pool_elt_at_index (wrk->event_elts, wrk->old_head));
+ clib_llist_elt (wrk->event_elts, wrk->old_head));
return elt;
}
-always_inline u8
-session_is_valid (u32 si, u8 thread_index)
-{
- session_t *s;
- s = pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
- if (s->session_state == SESSION_STATE_CLOSED)
- return 1;
-
- if (s->thread_index != thread_index || s->session_index != si)
- return 0;
- return 1;
-}
+int session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq);
session_t *session_alloc (u32 thread_index);
void session_free (session_t * s);
void session_free_w_fifos (session_t * s);
+void session_cleanup_half_open (session_handle_t ho_handle);
+u8 session_is_valid (u32 si, u8 thread_index);
always_inline session_t *
session_get (u32 si, u32 thread_index)
u64 session_segment_handle (session_t * s);
/**
- * Acquires a lock that blocks a session pool from expanding.
+ * Get session from handle and avoid pool validation if no same thread
*
- * This is typically used for safely peeking into other threads'
- * pools in order to clone elements. Lock should be dropped as soon
- * as possible by calling @ref session_pool_remove_peeker.
- *
- * NOTE: Avoid using pool_elt_at_index while the lock is held because
- * it may lead to free elt bitmap expansion/contraction!
- */
-always_inline void
-session_pool_add_peeker (u32 thread_index)
-{
- session_worker_t *wrk = &session_main.wrk[thread_index];
- if (thread_index == vlib_get_thread_index ())
- return;
- clib_rwlock_reader_lock (&wrk->peekers_rw_locks);
-}
-
-always_inline void
-session_pool_remove_peeker (u32 thread_index)
-{
- session_worker_t *wrk = &session_main.wrk[thread_index];
- if (thread_index == vlib_get_thread_index ())
- return;
- clib_rwlock_reader_unlock (&wrk->peekers_rw_locks);
-}
-
-/**
- * Get session from handle and 'lock' pool resize if not in same thread
- *
- * Caller should drop the peek 'lock' as soon as possible.
+ * Peekers are fine because pool grows with barrier (see @ref session_alloc)
*/
always_inline session_t *
session_get_from_handle_safe (u64 handle)
}
else
{
- session_pool_add_peeker (thread_index);
- /* Don't use pool_elt_at index. See @ref session_pool_add_peeker */
+ /* Don't use pool_elt_at index to avoid pool bitmap reallocs */
return wrk->sessions + session_index_from_handle (handle);
}
}
-always_inline u32
-session_get_index (session_t * s)
-{
- return (s - session_main.wrk[s->thread_index].sessions);
-}
-
always_inline session_t *
session_clone_safe (u32 session_index, u32 thread_index)
{
+ u32 current_thread_index = vlib_get_thread_index (), new_index;
session_t *old_s, *new_s;
- u32 current_thread_index = vlib_get_thread_index ();
- /* If during the memcpy pool is reallocated AND the memory allocator
- * decides to give the old chunk of memory to somebody in a hurry to
- * scribble something on it, we have a problem. So add this thread as
- * a session pool peeker.
- */
- session_pool_add_peeker (thread_index);
new_s = session_alloc (current_thread_index);
+ new_index = new_s->session_index;
+ /* Session pools are reallocated with barrier (see @ref session_alloc) */
old_s = session_main.wrk[thread_index].sessions + session_index;
clib_memcpy_fast (new_s, old_s, sizeof (*new_s));
- session_pool_remove_peeker (thread_index);
new_s->thread_index = current_thread_index;
- new_s->session_index = session_get_index (new_s);
+ new_s->session_index = new_index;
return new_s;
}
-int session_open (u32 app_index, session_endpoint_t * tep, u32 opaque);
+int session_open (session_endpoint_cfg_t *sep, session_handle_t *rsh);
int session_listen (session_t * s, session_endpoint_cfg_t * sep);
int session_stop_listen (session_t * s);
+void session_half_close (session_t *s);
void session_close (session_t * s);
void session_reset (session_t * s);
+void session_transport_half_close (session_t *s);
void session_transport_close (session_t * s);
void session_transport_reset (session_t * s);
void session_transport_cleanup (session_t * s);
void *rpc_args);
void session_add_self_custom_tx_evt (transport_connection_t * tc,
u8 has_prio);
+void sesssion_reschedule_tx (transport_connection_t * tc);
transport_connection_t *session_get_transport (session_t * s);
void session_get_endpoint (session_t * s, transport_endpoint_t * tep,
u8 is_lcl);
+int session_transport_attribute (session_t *s, u8 is_get,
+ transport_endpt_attr_t *attr);
u8 *format_session (u8 * s, va_list * args);
uword unformat_session (unformat_input_t * input, va_list * args);
session_dgram_hdr_t * hdr,
vlib_buffer_t * b, u8 proto,
u8 queue_event);
-int session_stream_connect_notify (transport_connection_t * tc, u8 is_fail);
+int session_stream_connect_notify (transport_connection_t * tc,
+ session_error_t err);
int session_dgram_connect_notify (transport_connection_t * tc,
u32 old_thread_index,
session_t ** new_session);
int session_stream_accept_notify (transport_connection_t * tc);
void session_transport_closing_notify (transport_connection_t * tc);
void session_transport_delete_notify (transport_connection_t * tc);
+void session_half_open_delete_notify (transport_connection_t *tc);
+void session_half_open_migrate_notify (transport_connection_t *tc);
+int session_half_open_migrated_notify (transport_connection_t *tc);
void session_transport_closed_notify (transport_connection_t * tc);
void session_transport_reset_notify (transport_connection_t * tc);
int session_stream_accept (transport_connection_t * tc, u32 listener_index,
u32 thread_index, u8 notify);
+int session_dgram_accept (transport_connection_t * tc, u32 listener_index,
+ u32 thread_index);
+/**
+ * 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.
+ *
+ * @param transport_proto transport proto to be registered
+ * @param vft virtual function table for transport
+ * @param is_ip4 flag that indicates if transports uses ipv4
+ * as underlying network layer
+ * @param output_node output node for transport
+ */
void session_register_transport (transport_proto_t transport_proto,
const transport_proto_vft_t * vft, u8 is_ip4,
u32 output_node);
+transport_proto_t session_add_transport_proto (void);
+void session_register_update_time_fn (session_update_time_fn fn, u8 is_add);
int session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer,
u32 offset, u32 max_bytes);
u32 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes);
+always_inline void
+session_set_state (session_t *s, session_state_t session_state)
+{
+ s->session_state = session_state;
+ SESSION_EVT (SESSION_EVT_STATE_CHANGE, s);
+}
+
always_inline u32
transport_max_rx_enqueue (transport_connection_t * tc)
{
transport_rx_fifo_size (transport_connection_t * tc)
{
session_t *s = session_get (tc->s_index, tc->thread_index);
- return s->rx_fifo->nitems;
+ return svm_fifo_size (s->rx_fifo);
}
always_inline u32
transport_tx_fifo_size (transport_connection_t * tc)
{
session_t *s = session_get (tc->s_index, tc->thread_index);
- return s->tx_fifo->nitems;
+ return svm_fifo_size (s->tx_fifo);
}
always_inline u8
return svm_fifo_has_ooo_data (s->rx_fifo);
}
-always_inline f64
+always_inline void
+transport_rx_fifo_req_deq_ntf (transport_connection_t *tc)
+{
+ session_t *s = session_get (tc->s_index, tc->thread_index);
+ svm_fifo_add_want_deq_ntf (s->rx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
+}
+
+always_inline clib_time_type_t
transport_time_now (u32 thread_index)
{
return session_main.wrk[thread_index].last_vlib_time;
}
+always_inline clib_us_time_t
+transport_us_time_now (u32 thread_index)
+{
+ return session_main.wrk[thread_index].last_vlib_us_time;
+}
+
+always_inline clib_time_type_t
+transport_seconds_per_loop (u32 thread_index)
+{
+ return session_main.wrk[thread_index].vm->seconds_per_loop;
+}
+
always_inline void
transport_add_tx_event (transport_connection_t * tc)
{
session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
}
+always_inline u32
+transport_cl_thread (void)
+{
+ return session_main.transport_cl_thread;
+}
+
/*
* Listen sessions
*/
always_inline void
listen_session_free (session_t * s)
{
+ ASSERT (!s->rx_fifo);
+ session_free (s);
+}
+
+always_inline session_t *
+ho_session_alloc (void)
+{
+ session_t *s;
+ ASSERT (vlib_get_thread_index () == 0);
+ s = session_alloc (0);
+ s->session_state = SESSION_STATE_CONNECTING;
+ s->flags |= SESSION_F_HALF_OPEN;
+ /* Not ideal. Half-opens are only allocated from main with worker barrier
+ * but can be cleaned up, i.e., session_half_open_free, from main without
+ * a barrier. In debug images, the free_bitmap can grow while workers peek
+ * the sessions pool, e.g., session_half_open_migrate_notify, and as a
+ * result crash while validating the session. To avoid this, grow the bitmap
+ * now. */
+ if (CLIB_DEBUG)
+ {
+ session_t *sp = session_main.wrk[0].sessions;
+ clib_bitmap_validate (pool_header (sp)->free_bitmap, s->session_index);
+ }
+ return s;
+}
+
+always_inline session_t *
+ho_session_get (u32 ho_index)
+{
+ return session_get (ho_index, 0 /* half-open thread */);
+}
+
+always_inline void
+ho_session_free (session_t *s)
+{
+ ASSERT (!s->rx_fifo && s->thread_index == 0);
session_free (s);
}
static inline session_worker_t *
session_main_get_worker_if_valid (u32 thread_index)
{
- if (pool_is_free_index (session_main.wrk, thread_index))
+ if (thread_index > vec_len (session_main.wrk))
return 0;
return &session_main.wrk[thread_index];
}
int session_main_flush_enqueue_events (u8 proto, u32 thread_index);
int session_main_flush_all_enqueue_events (u8 transport_proto);
-void session_flush_frames_main_thread (vlib_main_t * vm);
+void session_queue_run_on_main_thread (vlib_main_t * vm);
+/**
+ * Add session node pending buffer with custom node
+ *
+ * @param thread_index worker thread expected to send the buffer
+ * @param bi buffer index
+ * @param next_node next node edge index for buffer. Edge to next node
+ * must exist
+ */
always_inline void
-session_add_pending_tx_buffer (session_type_t st, u32 thread_index, u32 bi)
+session_add_pending_tx_buffer (u32 thread_index, u32 bi, u32 next_node)
{
session_worker_t *wrk = session_main_get_worker (thread_index);
vec_add1 (wrk->pending_tx_buffers, bi);
- vec_add1 (wrk->pending_tx_nexts, session_main.session_type_to_next[st]);
+ vec_add1 (wrk->pending_tx_nexts, next_node);
+ if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT))
+ vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
+}
+
+always_inline void
+session_wrk_update_time (session_worker_t *wrk, f64 now)
+{
+ wrk->last_vlib_time = now;
+ wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
}
-ssvm_private_t *session_main_get_evt_q_segment (void);
+void session_wrk_enable_adaptive_mode (session_worker_t *wrk);
+fifo_segment_t *session_main_get_wrk_mqs_segment (void);
void session_node_enable_disable (u8 is_en);
clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en);
+void session_wrk_handle_evts_main_rpc (void *);
+
+session_t *session_alloc_for_connection (transport_connection_t * tc);
+session_t *session_alloc_for_half_open (transport_connection_t *tc);
+
+typedef void (pool_safe_realloc_rpc_fn) (void *rpc_args);
+
+typedef struct
+{
+ u8 ph[STRUCT_OFFSET_OF (pool_header_t, max_elts) + 4];
+ u32 flag;
+} pool_safe_realloc_header_t;
+
+STATIC_ASSERT_SIZEOF (pool_safe_realloc_header_t, sizeof (pool_header_t));
+
+#define POOL_REALLOC_SAFE_ELT_THRESH 32
+
+#define pool_realloc_flag(PH) \
+ ((pool_safe_realloc_header_t *) pool_header (PH))->flag
+
+typedef struct pool_realloc_rpc_args_
+{
+ void **pool;
+ uword elt_size;
+ uword align;
+} pool_realloc_rpc_args_t;
+
+always_inline void
+pool_program_safe_realloc_rpc (void *args)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ u32 free_elts, max_elts, n_alloc;
+ pool_realloc_rpc_args_t *pra;
+
+ ASSERT (vlib_get_thread_index () == 0);
+ pra = (pool_realloc_rpc_args_t *) args;
+
+ vlib_worker_thread_barrier_sync (vm);
+
+ free_elts = _pool_free_elts (*pra->pool, pra->elt_size);
+ if (free_elts < POOL_REALLOC_SAFE_ELT_THRESH)
+ {
+ max_elts = _vec_max_len (*pra->pool, pra->elt_size);
+ n_alloc = clib_max (2 * max_elts, POOL_REALLOC_SAFE_ELT_THRESH);
+ _pool_alloc (pra->pool, free_elts + n_alloc, pra->align, 0,
+ pra->elt_size);
+ }
+ pool_realloc_flag (*pra->pool) = 0;
+ clib_mem_free (args);
+
+ vlib_worker_thread_barrier_release (vm);
+}
+
+always_inline void
+pool_program_safe_realloc (void **p, u32 elt_size, u32 align)
+{
+ pool_realloc_rpc_args_t *pra;
+
+ /* Reuse pad as a realloc flag */
+ if (pool_realloc_flag (*p))
+ return;
+
+ pra = clib_mem_alloc (sizeof (*pra));
+ pra->pool = p;
+ pra->elt_size = elt_size;
+ pra->align = align;
+ pool_realloc_flag (*p) = 1;
+
+ session_send_rpc_evt_to_thread (0 /* thread index */,
+ pool_program_safe_realloc_rpc, pra);
+}
+
+#define pool_needs_realloc(P) \
+ ((!P) || \
+ (vec_len (pool_header (P)->free_indices) < POOL_REALLOC_SAFE_ELT_THRESH && \
+ pool_free_elts (P) < POOL_REALLOC_SAFE_ELT_THRESH))
+
+#define pool_get_aligned_safe(P, E, align) \
+ do \
+ { \
+ if (PREDICT_FALSE (pool_needs_realloc (P))) \
+ { \
+ if (PREDICT_FALSE (!(P))) \
+ { \
+ pool_alloc_aligned (P, POOL_REALLOC_SAFE_ELT_THRESH, align); \
+ } \
+ else if (PREDICT_FALSE (!pool_free_elts (P))) \
+ { \
+ vlib_workers_sync (); \
+ pool_alloc_aligned (P, pool_max_len (P), align); \
+ vlib_workers_continue (); \
+ ALWAYS_ASSERT (pool_free_elts (P) > 0); \
+ } \
+ else \
+ { \
+ pool_program_safe_realloc ((void **) &(P), sizeof ((P)[0]), \
+ _vec_align (P, align)); \
+ } \
+ } \
+ pool_get_aligned (P, E, align); \
+ } \
+ while (0)
#endif /* __included_session_h__ */
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