1 files changed, 151 insertions, 0 deletions
diff --git a/collectors/proc.plugin/proc_net_softnet_stat.c b/collectors/proc.plugin/proc_net_softnet_stat.c
new file mode 100644
index 000000000..7ec783e77
--- /dev/null
+++ b/collectors/proc.plugin/proc_net_softnet_stat.c
@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "plugin_proc.h"
+
+#define PLUGIN_PROC_MODULE_NET_SOFTNET_NAME "/proc/net/softnet_stat"
+
+static inline char *softnet_column_name(size_t column) {
+    switch(column) {
+        // https://github.com/torvalds/linux/blob/a7fd20d1c476af4563e66865213474a2f9f473a4/net/core/net-procfs.c#L161-L166
+        case 0: return "processed";
+        case 1: return "dropped";
+        case 2: return "squeezed";
+        case 9: return "received_rps";
+        case 10: return "flow_limit_count";
+        default: return NULL;
+    }
+}
+
+int do_proc_net_softnet_stat(int update_every, usec_t dt) {
+    (void)dt;
+
+    static procfile *ff = NULL;
+    static int do_per_core = -1;
+    static size_t allocated_lines = 0, allocated_columns = 0;
+    static uint32_t *data = NULL;
+
+    if(unlikely(do_per_core == -1)) do_per_core = config_get_boolean("plugin:proc:/proc/net/softnet_stat", "softnet_stat per core", 1);
+
+    if(unlikely(!ff)) {
+        char filename[FILENAME_MAX + 1];
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/net/softnet_stat");
+        ff = procfile_open(config_get("plugin:proc:/proc/net/softnet_stat", "filename to monitor", filename), " \t", PROCFILE_FLAG_DEFAULT);
+        if(unlikely(!ff)) return 1;
+    }
+
+    ff = procfile_readall(ff);
+    if(unlikely(!ff)) return 0; // we return 0, so that we will retry to open it next time
+
+    size_t lines = procfile_lines(ff), l;
+    size_t words = procfile_linewords(ff, 0), w;
+
+    if(unlikely(!lines || !words)) {
+        error("Cannot read /proc/net/softnet_stat, %zu lines and %zu columns reported.", lines, words);
+        return 1;
+    }
+
+    if(unlikely(lines > 200)) lines = 200;
+    if(unlikely(words > 50)) words = 50;
+
+    if(unlikely(!data || lines > allocated_lines || words > allocated_columns)) {
+        freez(data);
+        allocated_lines = lines;
+        allocated_columns = words;
+        data = mallocz((allocated_lines + 1) * allocated_columns * sizeof(uint32_t));
+    }
+
+    // initialize to zero
+    memset(data, 0, (allocated_lines + 1) * allocated_columns * sizeof(uint32_t));
+
+    // parse the values
+    for(l = 0; l < lines ;l++) {
+        words = procfile_linewords(ff, l);
+        if(unlikely(!words)) continue;
+
+        if(unlikely(words > allocated_columns))
+            words = allocated_columns;
+
+        for(w = 0; w < words ; w++) {
+            if(unlikely(softnet_column_name(w))) {
+                uint32_t t = (uint32_t)strtoul(procfile_lineword(ff, l, w), NULL, 16);
+                data[w] += t;
+                data[((l + 1) * allocated_columns) + w] = t;
+            }
+        }
+    }
+
+    if(unlikely(data[(lines * allocated_columns)] == 0))
+        lines--;
+
+    RRDSET *st;
+
+    // --------------------------------------------------------------------
+
+    st = rrdset_find_bytype_localhost("system", "softnet_stat");
+    if(unlikely(!st)) {
+        st = rrdset_create_localhost(
+                "system"
+                , "softnet_stat"
+                , NULL
+                , "softnet_stat"
+                , "system.softnet_stat"
+                , "System softnet_stat"
+                , "events/s"
+                , PLUGIN_PROC_NAME
+                , PLUGIN_PROC_MODULE_NET_SOFTNET_NAME
+                , NETDATA_CHART_PRIO_SYSTEM_SOFTNET_STAT
+                , update_every
+                , RRDSET_TYPE_LINE
+        );
+        for(w = 0; w < allocated_columns ;w++)
+            if(unlikely(softnet_column_name(w)))
+                rrddim_add(st, softnet_column_name(w), NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+    }
+    else rrdset_next(st);
+
+    for(w = 0; w < allocated_columns ;w++)
+        if(unlikely(softnet_column_name(w)))
+            rrddim_set(st, softnet_column_name(w), data[w]);
+
+    rrdset_done(st);
+
+    if(do_per_core) {
+        for(l = 0; l < lines ;l++) {
+            char id[50+1];
+            snprintfz(id, 50, "cpu%zu_softnet_stat", l);
+
+            st = rrdset_find_bytype_localhost("cpu", id);
+            if(unlikely(!st)) {
+                char title[100+1];
+                snprintfz(title, 100, "CPU%zu softnet_stat", l);
+
+                st = rrdset_create_localhost(
+                        "cpu"
+                        , id
+                        , NULL
+                        , "softnet_stat"
+                        , "cpu.softnet_stat"
+                        , title
+                        , "events/s"
+                        , PLUGIN_PROC_NAME
+                        , PLUGIN_PROC_MODULE_NET_SOFTNET_NAME
+                        , NETDATA_CHART_PRIO_SOFTNET_PER_CORE + l
+                        , update_every
+                        , RRDSET_TYPE_LINE
+                );
+                for(w = 0; w < allocated_columns ;w++)
+                    if(unlikely(softnet_column_name(w)))
+                        rrddim_add(st, softnet_column_name(w), NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            }
+            else rrdset_next(st);
+
+            for(w = 0; w < allocated_columns ;w++)
+                if(unlikely(softnet_column_name(w)))
+                    rrddim_set(st, softnet_column_name(w), data[((l + 1) * allocated_columns) + w]);
+
+            rrdset_done(st);
+        }
+    }
+
+    return 0;
+}