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+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ * node_funcs.h: processing nodes global functions/inlines
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** \file
+ vlib node functions
+*/
+
+
+#ifndef included_vlib_node_funcs_h
+#define included_vlib_node_funcs_h
+
+#include <vppinfra/fifo.h>
+
+/** \brief Get vlib node by index.
+ @warning This function will ASSERT if @c i is out of range.
+ @param vm vlib_main_t pointer, varies by thread
+ @param i node index.
+ @return pointer to the requested vlib_node_t.
+*/
+
+always_inline vlib_node_t *
+vlib_get_node (vlib_main_t * vm, u32 i)
+{
+ return vec_elt (vm->node_main.nodes, i);
+}
+
+/** \brief Get vlib node by graph arc (next) index.
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of original node
+ @param next_index graph arc index
+ @return pointer to the vlib_node_t at the end of the indicated arc
+*/
+
+always_inline vlib_node_t *
+vlib_get_next_node (vlib_main_t * vm, u32 node_index, u32 next_index)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_node_t *n;
+
+ n = vec_elt (nm->nodes, node_index);
+ ASSERT (next_index < vec_len (n->next_nodes));
+ return vlib_get_node (vm, n->next_nodes[next_index]);
+}
+
+/** \brief Get node runtime by node index.
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of node
+ @return pointer to the indicated vlib_node_runtime_t
+*/
+
+always_inline vlib_node_runtime_t *
+vlib_node_get_runtime (vlib_main_t * vm, u32 node_index)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_node_t *n = vec_elt (nm->nodes, node_index);
+ vlib_process_t *p;
+ if (n->type != VLIB_NODE_TYPE_PROCESS)
+ return vec_elt_at_index (nm->nodes_by_type[n->type], n->runtime_index);
+ else
+ {
+ p = vec_elt (nm->processes, n->runtime_index);
+ return &p->node_runtime;
+ }
+}
+
+/** \brief Get node runtime private data by node index.
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of the node
+ @return pointer to the indicated vlib_node_runtime_t private data
+*/
+
+always_inline void *
+vlib_node_get_runtime_data (vlib_main_t * vm, u32 node_index)
+{
+ vlib_node_runtime_t *r = vlib_node_get_runtime (vm, node_index);
+ return r->runtime_data;
+}
+
+/** \brief Set node runtime private data.
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of the node
+ @param runtime_data arbitrary runtime private data
+ @param n_runtime_data_bytes size of runtime private data
+*/
+
+always_inline void
+vlib_node_set_runtime_data (vlib_main_t * vm, u32 node_index,
+ void *runtime_data, u32 n_runtime_data_bytes)
+{
+ vlib_node_t *n = vlib_get_node (vm, node_index);
+ vlib_node_runtime_t *r = vlib_node_get_runtime (vm, node_index);
+
+ n->runtime_data_bytes = n_runtime_data_bytes;
+ vec_free (n->runtime_data);
+ vec_add (n->runtime_data, runtime_data, n_runtime_data_bytes);
+
+ ASSERT (vec_len (n->runtime_data) <= sizeof (vlib_node_runtime_t) -
+ STRUCT_OFFSET_OF (vlib_node_runtime_t, runtime_data));
+
+ if (vec_len (n->runtime_data) > 0)
+ clib_memcpy (r->runtime_data, n->runtime_data, vec_len (n->runtime_data));
+}
+
+/** \brief Set node dispatch state.
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of the node
+ @param new_state new state for node, see vlib_node_state_t
+*/
+always_inline void
+vlib_node_set_state (vlib_main_t * vm, u32 node_index,
+ vlib_node_state_t new_state)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_node_t *n;
+ vlib_node_runtime_t *r;
+
+ n = vec_elt (nm->nodes, node_index);
+ if (n->type == VLIB_NODE_TYPE_PROCESS)
+ {
+ vlib_process_t *p = vec_elt (nm->processes, n->runtime_index);
+ r = &p->node_runtime;
+
+ /* When disabling make sure flags are cleared. */
+ p->flags &= ~(VLIB_PROCESS_RESUME_PENDING
+ | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK
+ | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT);
+ }
+ else
+ r = vec_elt_at_index (nm->nodes_by_type[n->type], n->runtime_index);
+
+ ASSERT (new_state < VLIB_N_NODE_STATE);
+
+ if (n->type == VLIB_NODE_TYPE_INPUT)
+ {
+ ASSERT (nm->input_node_counts_by_state[n->state] > 0);
+ nm->input_node_counts_by_state[n->state] -= 1;
+ nm->input_node_counts_by_state[new_state] += 1;
+ }
+
+ n->state = new_state;
+ r->state = new_state;
+}
+
+always_inline void
+vlib_node_set_interrupt_pending (vlib_main_t * vm, u32 node_index)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_node_t *n = vec_elt (nm->nodes, node_index);
+ ASSERT (n->type == VLIB_NODE_TYPE_INPUT);
+ vec_add1 (nm->pending_interrupt_node_runtime_indices, n->runtime_index);
+}
+
+always_inline vlib_process_t *
+vlib_get_process_from_node (vlib_main_t * vm, vlib_node_t * node)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ ASSERT (node->type == VLIB_NODE_TYPE_PROCESS);
+ return vec_elt (nm->processes, node->runtime_index);
+}
+
+/* Fetches frame with given handle. */
+always_inline vlib_frame_t *
+vlib_get_frame_no_check (vlib_main_t * vm, uword frame_index)
+{
+ vlib_frame_t *f;
+ u32 cpu_index = frame_index & VLIB_CPU_MASK;
+ u32 offset = frame_index & VLIB_OFFSET_MASK;
+ vm = vlib_mains ? vlib_mains[cpu_index] : vm;
+ f = vm->heap_base + offset;
+ return f;
+}
+
+always_inline u32
+vlib_frame_index_no_check (vlib_main_t * vm, vlib_frame_t * f)
+{
+ u32 i;
+
+ ASSERT (((uword) f & VLIB_CPU_MASK) == 0);
+
+ vm = vlib_mains ? vlib_mains[f->cpu_index] : vm;
+
+ i = ((u8 *) f - (u8 *) vm->heap_base);
+ return i | f->cpu_index;
+}
+
+always_inline vlib_frame_t *
+vlib_get_frame (vlib_main_t * vm, uword frame_index)
+{
+ vlib_frame_t *f = vlib_get_frame_no_check (vm, frame_index);
+ ASSERT (f->flags & VLIB_FRAME_IS_ALLOCATED);
+ return f;
+}
+
+always_inline u32
+vlib_frame_index (vlib_main_t * vm, vlib_frame_t * f)
+{
+ uword i = vlib_frame_index_no_check (vm, f);
+ ASSERT (vlib_get_frame (vm, i) == f);
+ return i;
+}
+
+/* Byte alignment for vector arguments. */
+#define VLIB_FRAME_VECTOR_ALIGN (1 << 4)
+
+always_inline u32
+vlib_frame_vector_byte_offset (u32 scalar_size)
+{
+ return round_pow2 (sizeof (vlib_frame_t) + scalar_size,
+ VLIB_FRAME_VECTOR_ALIGN);
+}
+
+/** \brief Get pointer to frame vector data.
+ @param f vlib_frame_t pointer
+ @return pointer to first vector element in frame
+*/
+always_inline void *
+vlib_frame_vector_args (vlib_frame_t * f)
+{
+ return (void *) f + vlib_frame_vector_byte_offset (f->scalar_size);
+}
+
+/** \brief Get pointer to frame scalar data.
+
+ @warning This is almost certainly not the function you wish to call.
+ See @ref vlib_frame_vector_args instead.
+
+ @param f vlib_frame_t pointer
+
+ @return arbitrary node scalar data
+
+ @sa vlib_frame_vector_args
+*/
+always_inline void *
+vlib_frame_args (vlib_frame_t * f)
+{
+ return vlib_frame_vector_args (f) - f->scalar_size;
+}
+
+always_inline vlib_next_frame_t *
+vlib_node_runtime_get_next_frame (vlib_main_t * vm,
+ vlib_node_runtime_t * n, u32 next_index)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_next_frame_t *nf;
+
+ ASSERT (next_index < n->n_next_nodes);
+ nf = vec_elt_at_index (nm->next_frames, n->next_frame_index + next_index);
+
+ if (CLIB_DEBUG > 0)
+ {
+ vlib_node_t *node, *next;
+ node = vec_elt (nm->nodes, n->node_index);
+ next = vec_elt (nm->nodes, node->next_nodes[next_index]);
+ ASSERT (nf->node_runtime_index == next->runtime_index);
+ }
+
+ return nf;
+}
+
+/** \brief Get pointer to frame by (@c node_index, @c next_index).
+
+ @warning This is not a function that you should call directly.
+ See @ref vlib_get_next_frame instead.
+
+ @param vm vlib_main_t pointer, varies by thread
+ @param node_index index of the node
+ @param next_index graph arc index
+
+ @return pointer to the requested vlib_next_frame_t
+
+ @sa vlib_get_next_frame
+*/
+
+always_inline vlib_next_frame_t *
+vlib_node_get_next_frame (vlib_main_t * vm, u32 node_index, u32 next_index)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_node_t *n;
+ vlib_node_runtime_t *r;
+
+ n = vec_elt (nm->nodes, node_index);
+ r = vec_elt_at_index (nm->nodes_by_type[n->type], n->runtime_index);
+ return vlib_node_runtime_get_next_frame (vm, r, next_index);
+}
+
+vlib_frame_t *vlib_get_next_frame_internal (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ u32 next_index,
+ u32 alloc_new_frame);
+
+#define vlib_get_next_frame_macro(vm,node,next_index,vectors,n_vectors_left,alloc_new_frame) \
+do { \
+ vlib_frame_t * _f \
+ = vlib_get_next_frame_internal ((vm), (node), (next_index), \
+ (alloc_new_frame)); \
+ u32 _n = _f->n_vectors; \
+ (vectors) = vlib_frame_vector_args (_f) + _n * sizeof ((vectors)[0]); \
+ (n_vectors_left) = VLIB_FRAME_SIZE - _n; \
+} while (0)
+
+
+/** \brief Get pointer to next frame vector data by
+ (@c vlib_node_runtime_t, @c next_index).
+ Standard single/dual loop boilerplate element.
+ @attention This is a MACRO, with SIDE EFFECTS.
+
+ @param vm vlib_main_t pointer, varies by thread
+ @param node current node vlib_node_runtime_t pointer
+ @param next_index requested graph arc index
+
+ @return @c vectors -- pointer to next available vector slot
+ @return @c n_vectors_left -- number of vector slots available
+*/
+#define vlib_get_next_frame(vm,node,next_index,vectors,n_vectors_left) \
+ vlib_get_next_frame_macro (vm, node, next_index, \
+ vectors, n_vectors_left, \
+ /* alloc new frame */ 0)
+
+#define vlib_get_new_next_frame(vm,node,next_index,vectors,n_vectors_left) \
+ vlib_get_next_frame_macro (vm, node, next_index, \
+ vectors, n_vectors_left, \
+ /* alloc new frame */ 1)
+
+/** \brief Release pointer to next frame vector data.
+ Standard single/dual loop boilerplate element.
+ @param vm vlib_main_t pointer, varies by thread
+ @param r current node vlib_node_runtime_t pointer
+ @param next_index graph arc index
+ @param n_packets_left number of slots still available in vector
+*/
+void
+vlib_put_next_frame (vlib_main_t * vm,
+ vlib_node_runtime_t * r,
+ u32 next_index, u32 n_packets_left);
+
+/* Combination get plus put. Returns vector argument just added. */
+#define vlib_set_next_frame(vm,node,next_index,v) \
+({ \
+ uword _n_left; \
+ vlib_get_next_frame ((vm), (node), (next_index), (v), _n_left); \
+ ASSERT (_n_left > 0); \
+ vlib_put_next_frame ((vm), (node), (next_index), _n_left - 1); \
+ (v); \
+})
+
+always_inline void
+vlib_set_next_frame_buffer (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ u32 next_index, u32 buffer_index)
+{
+ u32 *p;
+ p = vlib_set_next_frame (vm, node, next_index, p);
+ p[0] = buffer_index;
+}
+
+vlib_frame_t *vlib_get_frame_to_node (vlib_main_t * vm, u32 to_node_index);
+void vlib_put_frame_to_node (vlib_main_t * vm, u32 to_node_index,
+ vlib_frame_t * f);
+
+always_inline vlib_process_t *
+vlib_get_current_process (vlib_main_t * vm)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ return vec_elt (nm->processes, nm->current_process_index);
+}
+
+always_inline uword
+vlib_in_process_context (vlib_main_t * vm)
+{
+ return vm->node_main.current_process_index != ~0;
+}
+
+always_inline uword
+vlib_current_process (vlib_main_t * vm)
+{
+ return vlib_get_current_process (vm)->node_runtime.node_index;
+}
+
+/** Returns TRUE if a process suspend time is less than 1us
+ @param dt - remaining poll time in seconds
+ @returns 1 if dt < 1e-6, 0 otherwise
+*/
+always_inline uword
+vlib_process_suspend_time_is_zero (f64 dt)
+{
+ return dt < 1e-6;
+}
+
+/** Suspend a vlib cooperative multi-tasking thread for a period of time
+ @param vm - vlib_main_t *
+ @param dt - suspend interval in seconds
+ @returns VLIB_PROCESS_RESUME_LONGJMP_RESUME, routinely ignored
+*/
+
+always_inline uword
+vlib_process_suspend (vlib_main_t * vm, f64 dt)
+{
+ uword r;
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_process_t *p = vec_elt (nm->processes, nm->current_process_index);
+ u64 dt_cpu = dt * vm->clib_time.clocks_per_second;
+
+ if (vlib_process_suspend_time_is_zero (dt))
+ return VLIB_PROCESS_RESUME_LONGJMP_RESUME;
+
+ p->flags |= VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK;
+ r = clib_setjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_SUSPEND);
+ if (r == VLIB_PROCESS_RESUME_LONGJMP_SUSPEND)
+ {
+ p->resume_cpu_time = clib_cpu_time_now () + dt_cpu;
+ clib_longjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_SUSPEND);
+ }
+
+ return r;
+}
+
+always_inline void
+vlib_process_free_event_type (vlib_process_t * p, uword t,
+ uword is_one_time_event)
+{
+ ASSERT (!pool_is_free_index (p->event_type_pool, t));
+ pool_put_index (p->event_type_pool, t);
+ if (is_one_time_event)
+ p->one_time_event_type_bitmap =
+ clib_bitmap_andnoti (p->one_time_event_type_bitmap, t);
+}
+
+always_inline void
+vlib_process_maybe_free_event_type (vlib_process_t * p, uword t)
+{
+ ASSERT (!pool_is_free_index (p->event_type_pool, t));
+ if (clib_bitmap_get (p->one_time_event_type_bitmap, t))
+ vlib_process_free_event_type (p, t, /* is_one_time_event */ 1);
+}
+
+always_inline void *
+vlib_process_get_event_data (vlib_main_t * vm,
+ uword * return_event_type_opaque)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_process_t *p;
+ vlib_process_event_type_t *et;
+ uword t, l;
+ void *event_data_vector;
+
+ p = vec_elt (nm->processes, nm->current_process_index);
+
+ /* Find first type with events ready.
+ Return invalid type when there's nothing there. */
+ t = clib_bitmap_first_set (p->non_empty_event_type_bitmap);
+ if (t == ~0)
+ return 0;
+
+ p->non_empty_event_type_bitmap =
+ clib_bitmap_andnoti (p->non_empty_event_type_bitmap, t);
+
+ l = _vec_len (p->pending_event_data_by_type_index[t]);
+ ASSERT (l > 0);
+ event_data_vector = p->pending_event_data_by_type_index[t];
+ p->pending_event_data_by_type_index[t] = 0;
+
+ et = pool_elt_at_index (p->event_type_pool, t);
+
+ /* Return user's opaque value and possibly index. */
+ *return_event_type_opaque = et->opaque;
+
+ vlib_process_maybe_free_event_type (p, t);
+
+ return event_data_vector;
+}
+
+/* Return event data vector for later reuse. We reuse event data to avoid
+ repeatedly allocating event vectors in cases where we care about speed. */
+always_inline void
+vlib_process_put_event_data (vlib_main_t * vm, void *event_data)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vec_add1 (nm->recycled_event_data_vectors, event_data);
+}
+
+/** Return the first event type which has occurred and a vector of per-event
+ data of that type, or a timeout indication
+
+ @param vm - vlib_main_t pointer
+ @param data_vector - pointer to a (uword *) vector to receive event data
+ @returns either an event type and a vector of per-event instance data,
+ or ~0 to indicate a timeout.
+*/
+
+always_inline uword
+vlib_process_get_events (vlib_main_t * vm, uword ** data_vector)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_process_t *p;
+ vlib_process_event_type_t *et;
+ uword r, t, l;
+
+ p = vec_elt (nm->processes, nm->current_process_index);
+
+ /* Find first type with events ready.
+ Return invalid type when there's nothing there. */
+ t = clib_bitmap_first_set (p->non_empty_event_type_bitmap);
+ if (t == ~0)
+ return t;
+
+ p->non_empty_event_type_bitmap =
+ clib_bitmap_andnoti (p->non_empty_event_type_bitmap, t);
+
+ l = _vec_len (p->pending_event_data_by_type_index[t]);
+ if (data_vector)
+ vec_add (*data_vector, p->pending_event_data_by_type_index[t], l);
+ _vec_len (p->pending_event_data_by_type_index[t]) = 0;
+
+ et = pool_elt_at_index (p->event_type_pool, t);
+
+ /* Return user's opaque value. */
+ r = et->opaque;
+
+ vlib_process_maybe_free_event_type (p, t);
+
+ return r;
+}
+
+always_inline uword
+vlib_process_get_events_helper (vlib_process_t * p, uword t,
+ uword ** data_vector)
+{
+ uword l;
+
+ p->non_empty_event_type_bitmap =
+ clib_bitmap_andnoti (p->non_empty_event_type_bitmap, t);
+
+ l = _vec_len (p->pending_event_data_by_type_index[t]);
+ if (data_vector)
+ vec_add (*data_vector, p->pending_event_data_by_type_index[t], l);
+ _vec_len (p->pending_event_data_by_type_index[t]) = 0;
+
+ vlib_process_maybe_free_event_type (p, t);
+
+ return l;
+}
+
+/* As above but query as specified type of event. Returns number of
+ events found. */
+always_inline uword
+vlib_process_get_events_with_type (vlib_main_t * vm, uword ** data_vector,
+ uword with_type_opaque)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_process_t *p;
+ uword t, *h;
+
+ p = vec_elt (nm->processes, nm->current_process_index);
+ h = hash_get (p->event_type_index_by_type_opaque, with_type_opaque);
+ if (!h)
+ /* This can happen when an event has not yet been
+ signaled with given opaque type. */
+ return 0;
+
+ t = h[0];
+ if (!clib_bitmap_get (p->non_empty_event_type_bitmap, t))
+ return 0;
+
+ return vlib_process_get_events_helper (p, t, data_vector);
+}
+
+always_inline uword *
+vlib_process_wait_for_event (vlib_main_t * vm)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_process_t *p;
+ uword r;
+
+ p = vec_elt (nm->processes, nm->current_process_index);
+ if (clib_bitmap_is_zero (p->non_empty_event_type_bitmap))
+ {
+ p->flags |= VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT;
+ r =
+ clib_setjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_SUSPEND);
+ if (r == VLIB_PROCESS_RESUME_LONGJMP_SUSPEND)
+ clib_longjmp (&p->return_longjmp,
+ VLIB_PROCESS_RETURN_LONGJMP_SUSPEND);
+ }
+
+ return p->non_empty_event_type_bitmap;
+}
+
+always_inline uword
+vlib_process_wait_for_one_time_event (vlib_main_t * vm,
+ uword ** data_vector,
+ uword with_type_index)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_process_t *p;
+ uword r;
+
+ p = vec_elt (nm->processes, nm->current_process_index);
+ ASSERT (!pool_is_free_index (p->event_type_pool, with_type_index));
+ while (!clib_bitmap_get (p->non_empty_event_type_bitmap, with_type_index))
+ {
+ p->flags |= VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT;
+ r =
+ clib_setjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_SUSPEND);
+ if (r == VLIB_PROCESS_RESUME_LONGJMP_SUSPEND)
+ clib_longjmp (&p->return_longjmp,
+ VLIB_PROCESS_RETURN_LONGJMP_SUSPEND);
+ }
+
+ return vlib_process_get_events_helper (p, with_type_index, data_vector);
+}
+
+always_inline uword
+vlib_process_wait_for_event_with_type (vlib_main_t * vm,
+ uword ** data_vector,
+ uword with_type_opaque)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_process_t *p;
+ uword r, *h;
+
+ p = vec_elt (nm->processes, nm->current_process_index);
+ h = hash_get (p->event_type_index_by_type_opaque, with_type_opaque);
+ while (!h || !clib_bitmap_get (p->non_empty_event_type_bitmap, h[0]))
+ {
+ p->flags |= VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT;
+ r =
+ clib_setjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_SUSPEND);
+ if (r == VLIB_PROCESS_RESUME_LONGJMP_SUSPEND)
+ clib_longjmp (&p->return_longjmp,
+ VLIB_PROCESS_RETURN_LONGJMP_SUSPEND);
+
+ /* See if unknown event type has been signaled now. */
+ if (!h)
+ h = hash_get (p->event_type_index_by_type_opaque, with_type_opaque);
+ }
+
+ return vlib_process_get_events_helper (p, h[0], data_vector);
+}
+
+/** Suspend a cooperative multi-tasking thread
+ Waits for an event, or for the indicated number of seconds to elapse
+ @param vm - vlib_main_t pointer
+ @param dt - timeout, in seconds.
+ @returns the remaining time interval
+*/
+
+always_inline f64
+vlib_process_wait_for_event_or_clock (vlib_main_t * vm, f64 dt)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_process_t *p;
+ f64 wakeup_time;
+ uword r;
+
+ p = vec_elt (nm->processes, nm->current_process_index);
+
+ if (vlib_process_suspend_time_is_zero (dt)
+ || !clib_bitmap_is_zero (p->non_empty_event_type_bitmap))
+ return dt;
+
+ wakeup_time = vlib_time_now (vm) + dt;
+
+ /* Suspend waiting for both clock and event to occur. */
+ p->flags |= (VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT
+ | VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK);
+
+ r = clib_setjmp (&p->resume_longjmp, VLIB_PROCESS_RESUME_LONGJMP_SUSPEND);
+ if (r == VLIB_PROCESS_RESUME_LONGJMP_SUSPEND)
+ {
+ p->resume_cpu_time = (clib_cpu_time_now ()
+ + (dt * vm->clib_time.clocks_per_second));
+ clib_longjmp (&p->return_longjmp, VLIB_PROCESS_RETURN_LONGJMP_SUSPEND);
+ }
+
+ /* Return amount of time still left to sleep.
+ If <= 0 then we've been waken up by the clock (and not an event). */
+ return wakeup_time - vlib_time_now (vm);
+}
+
+always_inline vlib_process_event_type_t *
+vlib_process_new_event_type (vlib_process_t * p, uword with_type_opaque)
+{
+ vlib_process_event_type_t *et;
+ pool_get (p->event_type_pool, et);
+ et->opaque = with_type_opaque;
+ return et;
+}
+
+always_inline uword
+vlib_process_create_one_time_event (vlib_main_t * vm, uword node_index,
+ uword with_type_opaque)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_node_t *n = vlib_get_node (vm, node_index);
+ vlib_process_t *p = vec_elt (nm->processes, n->runtime_index);
+ vlib_process_event_type_t *et;
+ uword t;
+
+ et = vlib_process_new_event_type (p, with_type_opaque);
+ t = et - p->event_type_pool;
+ p->one_time_event_type_bitmap =
+ clib_bitmap_ori (p->one_time_event_type_bitmap, t);
+ return t;
+}
+
+always_inline void
+vlib_process_delete_one_time_event (vlib_main_t * vm, uword node_index,
+ uword t)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_node_t *n = vlib_get_node (vm, node_index);
+ vlib_process_t *p = vec_elt (nm->processes, n->runtime_index);
+
+ ASSERT (clib_bitmap_get (p->one_time_event_type_bitmap, t));
+ vlib_process_free_event_type (p, t, /* is_one_time_event */ 1);
+}
+
+always_inline void *
+vlib_process_signal_event_helper (vlib_node_main_t * nm,
+ vlib_node_t * n,
+ vlib_process_t * p,
+ uword t,
+ uword n_data_elts, uword n_data_elt_bytes)
+{
+ uword p_flags, add_to_pending, delete_from_wheel;
+ void *data_to_be_written_by_caller;
+
+ ASSERT (!pool_is_free_index (p->event_type_pool, t));
+
+ vec_validate (p->pending_event_data_by_type_index, t);
+
+ /* Resize data vector and return caller's data to be written. */
+ {
+ void *data_vec = p->pending_event_data_by_type_index[t];
+ uword l;
+
+ if (!data_vec && vec_len (nm->recycled_event_data_vectors))
+ {
+ data_vec = vec_pop (nm->recycled_event_data_vectors);
+ _vec_len (data_vec) = 0;
+ }
+
+ l = vec_len (data_vec);
+
+ data_vec = _vec_resize (data_vec,
+ /* length_increment */ n_data_elts,
+ /* total size after increment */
+ (l + n_data_elts) * n_data_elt_bytes,
+ /* header_bytes */ 0, /* data_align */ 0);
+
+ p->pending_event_data_by_type_index[t] = data_vec;
+ data_to_be_written_by_caller = data_vec + l * n_data_elt_bytes;
+ }
+
+ p->non_empty_event_type_bitmap =
+ clib_bitmap_ori (p->non_empty_event_type_bitmap, t);
+
+ p_flags = p->flags;
+
+ /* Event was already signalled? */
+ add_to_pending = (p_flags & VLIB_PROCESS_RESUME_PENDING) == 0;
+
+ /* Process will resume when suspend time elapses? */
+ delete_from_wheel = 0;
+ if (p_flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_CLOCK)
+ {
+ /* Waiting for both event and clock? */
+ if (p_flags & VLIB_PROCESS_IS_SUSPENDED_WAITING_FOR_EVENT)
+ delete_from_wheel = 1;
+ else
+ /* Waiting only for clock. Event will be queue and may be
+ handled when timer expires. */
+ add_to_pending = 0;
+ }
+
+ /* Never add current process to pending vector since current process is
+ already running. */
+ add_to_pending &= nm->current_process_index != n->runtime_index;
+
+ if (add_to_pending)
+ {
+ u32 x = vlib_timing_wheel_data_set_suspended_process (n->runtime_index);
+ p->flags = p_flags | VLIB_PROCESS_RESUME_PENDING;
+ vec_add1 (nm->data_from_advancing_timing_wheel, x);
+ if (delete_from_wheel)
+ timing_wheel_delete (&nm->timing_wheel, x);
+ }
+
+ return data_to_be_written_by_caller;
+}
+
+always_inline void *
+vlib_process_signal_event_data (vlib_main_t * vm,
+ uword node_index,
+ uword type_opaque,
+ uword n_data_elts, uword n_data_elt_bytes)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_node_t *n = vlib_get_node (vm, node_index);
+ vlib_process_t *p = vec_elt (nm->processes, n->runtime_index);
+ uword *h, t;
+
+ h = hash_get (p->event_type_index_by_type_opaque, type_opaque);
+ if (!h)
+ {
+ vlib_process_event_type_t *et =
+ vlib_process_new_event_type (p, type_opaque);
+ t = et - p->event_type_pool;
+ hash_set (p->event_type_index_by_type_opaque, type_opaque, t);
+ }
+ else
+ t = h[0];
+
+ return vlib_process_signal_event_helper (nm, n, p, t, n_data_elts,
+ n_data_elt_bytes);
+}
+
+always_inline void *
+vlib_process_signal_event_at_time (vlib_main_t * vm,
+ f64 dt,
+ uword node_index,
+ uword type_opaque,
+ uword n_data_elts, uword n_data_elt_bytes)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_node_t *n = vlib_get_node (vm, node_index);
+ vlib_process_t *p = vec_elt (nm->processes, n->runtime_index);
+ uword *h, t;
+
+ h = hash_get (p->event_type_index_by_type_opaque, type_opaque);
+ if (!h)
+ {
+ vlib_process_event_type_t *et =
+ vlib_process_new_event_type (p, type_opaque);
+ t = et - p->event_type_pool;
+ hash_set (p->event_type_index_by_type_opaque, type_opaque, t);
+ }
+ else
+ t = h[0];
+
+ if (vlib_process_suspend_time_is_zero (dt))
+ return vlib_process_signal_event_helper (nm, n, p, t, n_data_elts,
+ n_data_elt_bytes);
+ else
+ {
+ vlib_signal_timed_event_data_t *te;
+ u64 dt_cpu = dt * vm->clib_time.clocks_per_second;
+
+ pool_get_aligned (nm->signal_timed_event_data_pool, te, sizeof (te[0]));
+
+ te->n_data_elts = n_data_elts;
+ te->n_data_elt_bytes = n_data_elt_bytes;
+ te->n_data_bytes = n_data_elts * n_data_elt_bytes;
+
+ /* Assert that structure fields are big enough. */
+ ASSERT (te->n_data_elts == n_data_elts);
+ ASSERT (te->n_data_elt_bytes == n_data_elt_bytes);
+ ASSERT (te->n_data_bytes == n_data_elts * n_data_elt_bytes);
+
+ te->process_node_index = n->runtime_index;
+ te->event_type_index = t;
+
+ timing_wheel_insert (&nm->timing_wheel, clib_cpu_time_now () + dt_cpu,
+ vlib_timing_wheel_data_set_timed_event (te -
+ nm->
+ signal_timed_event_data_pool));
+
+ /* Inline data big enough to hold event? */
+ if (te->n_data_bytes < sizeof (te->inline_event_data))
+ return te->inline_event_data;
+ else
+ {
+ te->event_data_as_vector = 0;
+ vec_resize (te->event_data_as_vector, te->n_data_bytes);
+ return te->event_data_as_vector;
+ }
+ }
+}
+
+always_inline void *
+vlib_process_signal_one_time_event_data (vlib_main_t * vm,
+ uword node_index,
+ uword type_index,
+ uword n_data_elts,
+ uword n_data_elt_bytes)
+{
+ vlib_node_main_t *nm = &vm->node_main;
+ vlib_node_t *n = vlib_get_node (vm, node_index);
+ vlib_process_t *p = vec_elt (nm->processes, n->runtime_index);
+ return vlib_process_signal_event_helper (nm, n, p, type_index, n_data_elts,
+ n_data_elt_bytes);
+}
+
+always_inline void
+vlib_process_signal_event (vlib_main_t * vm,
+ uword node_index, uword type_opaque, uword data)
+{
+ uword *d = vlib_process_signal_event_data (vm, node_index, type_opaque,
+ 1 /* elts */ , sizeof (uword));
+ d[0] = data;
+}
+
+always_inline void
+vlib_process_signal_event_pointer (vlib_main_t * vm,
+ uword node_index,
+ uword type_opaque, void *data)
+{
+ void **d = vlib_process_signal_event_data (vm, node_index, type_opaque,
+ 1 /* elts */ , sizeof (data));
+ d[0] = data;
+}
+
+always_inline void
+vlib_process_signal_one_time_event (vlib_main_t * vm,
+ uword node_index,
+ uword type_index, uword data)
+{
+ uword *d =
+ vlib_process_signal_one_time_event_data (vm, node_index, type_index,
+ 1 /* elts */ , sizeof (uword));
+ d[0] = data;
+}
+
+always_inline void
+vlib_signal_one_time_waiting_process (vlib_main_t * vm,
+ vlib_one_time_waiting_process_t * p)
+{
+ vlib_process_signal_one_time_event (vm, p->node_index, p->one_time_event,
+ /* data */ ~0);
+ memset (p, ~0, sizeof (p[0]));
+}
+
+always_inline void
+vlib_signal_one_time_waiting_process_vector (vlib_main_t * vm,
+ vlib_one_time_waiting_process_t
+ ** wps)
+{
+ vlib_one_time_waiting_process_t *wp;
+ vec_foreach (wp, *wps) vlib_signal_one_time_waiting_process (vm, wp);
+ vec_free (*wps);
+}
+
+always_inline void
+vlib_current_process_wait_for_one_time_event (vlib_main_t * vm,
+ vlib_one_time_waiting_process_t
+ * p)
+{
+ p->node_index = vlib_current_process (vm);
+ p->one_time_event = vlib_process_create_one_time_event (vm, p->node_index, /* type opaque */
+ ~0);
+ vlib_process_wait_for_one_time_event (vm,
+ /* don't care about data */ 0,
+ p->one_time_event);
+}
+
+always_inline void
+vlib_current_process_wait_for_one_time_event_vector (vlib_main_t * vm,
+ vlib_one_time_waiting_process_t
+ ** wps)
+{
+ vlib_one_time_waiting_process_t *wp;
+ vec_add2 (*wps, wp, 1);
+ vlib_current_process_wait_for_one_time_event (vm, wp);
+}
+
+always_inline u32
+vlib_node_runtime_update_main_loop_vector_stats (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ uword n_vectors)
+{
+ u32 i, d, vi0, vi1;
+ u32 i0, i1;
+
+ ASSERT (is_pow2 (ARRAY_LEN (node->main_loop_vector_stats)));
+ i = ((vm->main_loop_count >> VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE)
+ & (ARRAY_LEN (node->main_loop_vector_stats) - 1));
+ i0 = i ^ 0;
+ i1 = i ^ 1;
+ d = ((vm->main_loop_count >> VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE)
+ -
+ (node->main_loop_count_last_dispatch >>
+ VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE));
+ vi0 = node->main_loop_vector_stats[i0];
+ vi1 = node->main_loop_vector_stats[i1];
+ vi0 = d == 0 ? vi0 : 0;
+ vi1 = d <= 1 ? vi1 : 0;
+ vi0 += n_vectors;
+ node->main_loop_vector_stats[i0] = vi0;
+ node->main_loop_vector_stats[i1] = vi1;
+ node->main_loop_count_last_dispatch = vm->main_loop_count;
+ /* Return previous counter. */
+ return node->main_loop_vector_stats[i1];
+}
+
+always_inline f64
+vlib_node_vectors_per_main_loop_as_float (vlib_main_t * vm, u32 node_index)
+{
+ vlib_node_runtime_t *rt = vlib_node_get_runtime (vm, node_index);
+ u32 v;
+
+ v = vlib_node_runtime_update_main_loop_vector_stats (vm, rt, /* n_vectors */
+ 0);
+ return (f64) v / (1 << VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE);
+}
+
+always_inline u32
+vlib_node_vectors_per_main_loop_as_integer (vlib_main_t * vm, u32 node_index)
+{
+ vlib_node_runtime_t *rt = vlib_node_get_runtime (vm, node_index);
+ u32 v;
+
+ v = vlib_node_runtime_update_main_loop_vector_stats (vm, rt, /* n_vectors */
+ 0);
+ return v >> VLIB_LOG2_MAIN_LOOPS_PER_STATS_UPDATE;
+}
+
+void
+vlib_frame_free (vlib_main_t * vm, vlib_node_runtime_t * r, vlib_frame_t * f);
+
+/* Add next node to given node in given slot. */
+uword
+vlib_node_add_next_with_slot (vlib_main_t * vm,
+ uword node, uword next_node, uword slot);
+
+/* As above but adds to end of node's next vector. */
+always_inline uword
+vlib_node_add_next (vlib_main_t * vm, uword node, uword next_node)
+{
+ return vlib_node_add_next_with_slot (vm, node, next_node, ~0);
+}
+
+/* Add next node to given node in given slot. */
+uword
+vlib_node_add_named_next_with_slot (vlib_main_t * vm,
+ uword node, char *next_name, uword slot);
+
+/* As above but adds to end of node's next vector. */
+always_inline uword
+vlib_node_add_named_next (vlib_main_t * vm, uword node, char *name)
+{
+ return vlib_node_add_named_next_with_slot (vm, node, name, ~0);
+}
+
+/* Query node given name. */
+vlib_node_t *vlib_get_node_by_name (vlib_main_t * vm, u8 * name);
+
+/* Rename a node. */
+void vlib_node_rename (vlib_main_t * vm, u32 node_index, char *fmt, ...);
+
+/* Register new packet processing node. Nodes can be registered
+ dynamically via this call or statically via the VLIB_REGISTER_NODE
+ macro. */
+u32 vlib_register_node (vlib_main_t * vm, vlib_node_registration_t * r);
+
+/* Register all static nodes registered via VLIB_REGISTER_NODE. */
+void vlib_register_all_static_nodes (vlib_main_t * vm);
+
+/* Start a process. */
+void vlib_start_process (vlib_main_t * vm, uword process_index);
+
+/* Sync up runtime and main node stats. */
+void vlib_node_sync_stats (vlib_main_t * vm, vlib_node_t * n);
+
+/* Node graph initialization function. */
+clib_error_t *vlib_node_main_init (vlib_main_t * vm);
+
+format_function_t format_vlib_node_graph;
+format_function_t format_vlib_node_name;
+format_function_t format_vlib_next_node_name;
+format_function_t format_vlib_node_and_next;
+format_function_t format_vlib_cpu_time;
+format_function_t format_vlib_time;
+/* Parse node name -> node index. */
+unformat_function_t unformat_vlib_node;
+
+always_inline void
+vlib_node_increment_counter (vlib_main_t * vm, u32 node_index,
+ u32 counter_index, u64 increment)
+{
+ vlib_node_t *n = vlib_get_node (vm, node_index);
+ vlib_error_main_t *em = &vm->error_main;
+ u32 node_counter_base_index = n->error_heap_index;
+ em->counters[node_counter_base_index + counter_index] += increment;
+}
+
+#endif /* included_vlib_node_funcs_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */