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-rw-r--r--src/vlib/stats/init.c246
1 files changed, 246 insertions, 0 deletions
diff --git a/src/vlib/stats/init.c b/src/vlib/stats/init.c
new file mode 100644
index 00000000000..d81916a288d
--- /dev/null
+++ b/src/vlib/stats/init.c
@@ -0,0 +1,246 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright(c) 2022 Cisco Systems, Inc.
+ */
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlib/stats/stats.h>
+
+#define STAT_SEGMENT_SOCKET_FILENAME "stats.sock"
+
+static void
+vector_rate_collector_fn (vlib_stats_collector_data_t *d)
+{
+ vlib_main_t *this_vlib_main;
+ counter_t **counters = d->entry->data;
+ counter_t *cb = counters[0];
+ f64 vector_rate = 0.0;
+ u32 i, n_threads = vlib_get_n_threads ();
+
+ vlib_stats_validate_counter_vector (d->entry_index, n_threads - 1);
+
+ for (i = 0; i < n_threads; i++)
+ {
+ f64 this_vector_rate;
+ this_vlib_main = vlib_get_main_by_index (i);
+
+ this_vector_rate = vlib_internal_node_vector_rate (this_vlib_main);
+ vlib_clear_internal_node_vector_rate (this_vlib_main);
+
+ cb[i] = this_vector_rate;
+ vector_rate += this_vector_rate;
+ }
+
+ /* And set the system average rate */
+ vector_rate /= (f64) (i > 1 ? i - 1 : 1);
+ vlib_stats_set_gauge (d->private_data, vector_rate);
+}
+
+clib_error_t *
+vlib_stats_init (vlib_main_t *vm)
+{
+ vlib_stats_segment_t *sm = vlib_stats_get_segment ();
+ vlib_stats_shared_header_t *shared_header;
+ vlib_stats_collector_reg_t reg = {};
+
+ void *oldheap;
+ uword memory_size, sys_page_sz;
+ int mfd;
+ char *mem_name = "stat segment";
+ void *heap, *memaddr;
+
+ memory_size = sm->memory_size;
+ if (memory_size == 0)
+ memory_size = STAT_SEGMENT_DEFAULT_SIZE;
+
+ if (sm->log2_page_sz == CLIB_MEM_PAGE_SZ_UNKNOWN)
+ sm->log2_page_sz = CLIB_MEM_PAGE_SZ_DEFAULT;
+
+ mfd = clib_mem_vm_create_fd (sm->log2_page_sz, mem_name);
+
+ if (mfd == -1)
+ return clib_error_return (0, "stat segment memory fd failure: %U",
+ format_clib_error, clib_mem_get_last_error ());
+ /* Set size */
+ if ((ftruncate (mfd, memory_size)) == -1)
+ {
+ close (mfd);
+ return clib_error_return (0, "stat segment ftruncate failure");
+ }
+
+ memaddr = clib_mem_vm_map_shared (0, memory_size, mfd, 0, mem_name);
+
+ if (memaddr == CLIB_MEM_VM_MAP_FAILED)
+ return clib_error_return (0, "stat segment mmap failure");
+
+ sys_page_sz = clib_mem_get_page_size ();
+
+ heap =
+ clib_mem_create_heap (((u8 *) memaddr) + sys_page_sz,
+ memory_size - sys_page_sz, 1 /* locked */, mem_name);
+ sm->heap = heap;
+ sm->memfd = mfd;
+
+ sm->directory_vector_by_name = hash_create_string (0, sizeof (uword));
+ sm->shared_header = shared_header = memaddr;
+
+ shared_header->version = STAT_SEGMENT_VERSION;
+ shared_header->base = memaddr;
+
+ sm->stat_segment_lockp = clib_mem_alloc (sizeof (clib_spinlock_t));
+ clib_spinlock_init (sm->stat_segment_lockp);
+
+ oldheap = clib_mem_set_heap (sm->heap);
+
+ /* Set up the name to counter-vector hash table */
+ sm->directory_vector = 0;
+
+ shared_header->epoch = 1;
+
+ /* Scalar stats and node counters */
+ vec_validate (sm->directory_vector, STAT_COUNTERS - 1);
+#define _(E, t, n, p) \
+ strcpy (sm->directory_vector[STAT_COUNTER_##E].name, p "/" #n); \
+ sm->directory_vector[STAT_COUNTER_##E].type = STAT_DIR_TYPE_##t;
+ foreach_stat_segment_counter_name
+#undef _
+ /* Save the vector in the shared segment, for clients */
+ shared_header->directory_vector = sm->directory_vector;
+
+ clib_mem_set_heap (oldheap);
+
+ vlib_stats_register_mem_heap (heap);
+
+ reg.collect_fn = vector_rate_collector_fn;
+ reg.private_data = vlib_stats_add_gauge ("/sys/vector_rate");
+ reg.entry_index =
+ vlib_stats_add_counter_vector ("/sys/vector_rate_per_worker");
+ vlib_stats_register_collector_fn (&reg);
+ vlib_stats_validate_counter_vector (reg.entry_index, vlib_get_n_threads ());
+
+ return 0;
+}
+
+static clib_error_t *
+statseg_config (vlib_main_t *vm, unformat_input_t *input)
+{
+ vlib_stats_segment_t *sm = vlib_stats_get_segment ();
+ sm->update_interval = 10.0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "socket-name %s", &sm->socket_name))
+ ;
+ /* DEPRECATE: default (does nothing) */
+ else if (unformat (input, "default"))
+ ;
+ else if (unformat (input, "size %U", unformat_memory_size,
+ &sm->memory_size))
+ ;
+ else if (unformat (input, "page-size %U", unformat_log2_page_size,
+ &sm->log2_page_sz))
+ ;
+ else if (unformat (input, "per-node-counters on"))
+ sm->node_counters_enabled = 1;
+ else if (unformat (input, "per-node-counters off"))
+ sm->node_counters_enabled = 0;
+ else if (unformat (input, "update-interval %f", &sm->update_interval))
+ ;
+ else
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, input);
+ }
+
+ /*
+ * NULL-terminate socket name string
+ * clib_socket_init()->socket_config() use C str*
+ */
+ if (vec_len (sm->socket_name))
+ vec_terminate_c_string (sm->socket_name);
+
+ return 0;
+}
+
+VLIB_EARLY_CONFIG_FUNCTION (statseg_config, "statseg");
+
+/*
+ * Accept connection on the socket and exchange the fd for the shared
+ * memory segment.
+ */
+static clib_error_t *
+stats_socket_accept_ready (clib_file_t *uf)
+{
+ vlib_stats_segment_t *sm = vlib_stats_get_segment ();
+ clib_error_t *err;
+ clib_socket_t client = { 0 };
+
+ err = clib_socket_accept (sm->socket, &client);
+ if (err)
+ {
+ clib_error_report (err);
+ return err;
+ }
+
+ /* Send the fd across and close */
+ err = clib_socket_sendmsg (&client, 0, 0, &sm->memfd, 1);
+ if (err)
+ clib_error_report (err);
+ clib_socket_close (&client);
+
+ return 0;
+}
+
+static clib_error_t *
+stats_segment_socket_init (void)
+{
+ vlib_stats_segment_t *sm = vlib_stats_get_segment ();
+ clib_error_t *error;
+ clib_socket_t *s = clib_mem_alloc (sizeof (clib_socket_t));
+
+ memset (s, 0, sizeof (clib_socket_t));
+ s->config = (char *) sm->socket_name;
+ s->flags = CLIB_SOCKET_F_IS_SERVER | CLIB_SOCKET_F_SEQPACKET |
+ CLIB_SOCKET_F_ALLOW_GROUP_WRITE | CLIB_SOCKET_F_PASSCRED;
+
+ if ((error = clib_socket_init (s)))
+ return error;
+
+ clib_file_t template = { 0 };
+ template.read_function = stats_socket_accept_ready;
+ template.file_descriptor = s->fd;
+ template.description = format (0, "stats segment listener %s", s->config);
+ clib_file_add (&file_main, &template);
+
+ sm->socket = s;
+
+ return 0;
+}
+
+static clib_error_t *
+stats_segment_socket_exit (vlib_main_t *vm)
+{
+ /*
+ * cleanup the listener socket on exit.
+ */
+ vlib_stats_segment_t *sm = vlib_stats_get_segment ();
+ unlink ((char *) sm->socket_name);
+ return 0;
+}
+
+VLIB_MAIN_LOOP_EXIT_FUNCTION (stats_segment_socket_exit);
+
+static clib_error_t *
+statseg_init (vlib_main_t *vm)
+{
+ vlib_stats_segment_t *sm = vlib_stats_get_segment ();
+
+ /* set default socket file name when statseg config stanza is empty. */
+ if (!vec_len (sm->socket_name))
+ sm->socket_name = format (0, "%s/%s%c", vlib_unix_get_runtime_dir (),
+ STAT_SEGMENT_SOCKET_FILENAME, 0);
+ return stats_segment_socket_init ();
+}
+
+VLIB_INIT_FUNCTION (statseg_init) = {
+ .runs_after = VLIB_INITS ("unix_input_init", "linux_epoll_input_init"),
+};