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-rw-r--r--scripts/gen-tunables.awk157
1 files changed, 157 insertions, 0 deletions
diff --git a/scripts/gen-tunables.awk b/scripts/gen-tunables.awk
new file mode 100644
index 0000000000..b65b5a4a33
--- /dev/null
+++ b/scripts/gen-tunables.awk
@@ -0,0 +1,157 @@
+# Generate dl-tunable-list.h from dl-tunables.list
+
+BEGIN {
+ tunable=""
+ ns=""
+ top_ns=""
+}
+
+# Skip over blank lines and comments.
+/^#/ {
+ next
+}
+
+/^[ \t]*$/ {
+ next
+}
+
+# Beginning of either a top namespace, tunable namespace or a tunable, decided
+# on the current value of TUNABLE, NS or TOP_NS.
+$2 == "{" {
+ if (top_ns == "") {
+ top_ns = $1
+ }
+ else if (ns == "") {
+ ns = $1
+ }
+ else if (tunable == "") {
+ tunable = $1
+ }
+ else {
+ printf ("Unexpected occurrence of '{': %s:%d\n", FILENAME, FNR)
+ exit 1
+ }
+
+ next
+}
+
+# End of either a top namespace, tunable namespace or a tunable.
+$1 == "}" {
+ if (tunable != "") {
+ # Tunables definition ended, now fill in default attributes.
+ if (!types[top_ns][ns][tunable]) {
+ types[top_ns][ns][tunable] = "STRING"
+ }
+ if (!minvals[top_ns][ns][tunable]) {
+ minvals[top_ns][ns][tunable] = "0"
+ }
+ if (!maxvals[top_ns][ns][tunable]) {
+ maxvals[top_ns][ns][tunable] = "0"
+ }
+ if (!env_alias[top_ns][ns][tunable]) {
+ env_alias[top_ns][ns][tunable] = "NULL"
+ }
+ if (!is_secure[top_ns][ns][tunable]) {
+ is_secure[top_ns][ns][tunable] = "false"
+ }
+
+ tunable = ""
+ }
+ else if (ns != "") {
+ ns = ""
+ }
+ else if (top_ns != "") {
+ top_ns = ""
+ }
+ else {
+ printf ("syntax error: extra }: %s:%d\n", FILENAME, FNR)
+ exit 1
+ }
+ next
+}
+
+# Everything else, which could either be a tunable without any attributes or a
+# tunable attribute.
+{
+ if (ns == "") {
+ printf("Line %d: Invalid tunable outside a namespace: %s\n", NR, $0)
+ exit 1
+ }
+
+ if (tunable == "") {
+ # We encountered a tunable without any attributes, so note it with a
+ # default.
+ types[top_ns][ns][$1] = "STRING"
+ next
+ }
+
+ # Otherwise, we have encountered a tunable attribute.
+ split($0, arr, ":")
+ attr = gensub(/^[ \t]+|[ \t]+$/, "", "g", arr[1])
+ val = gensub(/^[ \t]+|[ \t]+$/, "", "g", arr[2])
+
+ if (attr == "type") {
+ types[top_ns][ns][tunable] = val
+ }
+ else if (attr == "minval") {
+ minvals[top_ns][ns][tunable] = val
+ }
+ else if (attr == "maxval") {
+ maxvals[top_ns][ns][tunable] = val
+ }
+ else if (attr == "env_alias") {
+ env_alias[top_ns][ns][tunable] = sprintf("\"%s\"", val)
+ }
+ else if (attr == "is_secure") {
+ if (val == "true" || val == "false") {
+ is_secure[top_ns][ns][tunable] = val
+ }
+ else {
+ printf("Line %d: Invalid value (%s) for is_secure: %s, ", NR, val,
+ $0)
+ print("Allowed values are 'true' or 'false'")
+ exit 1
+ }
+ }
+}
+
+END {
+ if (ns != "") {
+ print "Unterminated namespace. Is a closing brace missing?"
+ exit 1
+ }
+
+ print "/* AUTOGENERATED by gen-tunables.awk. */"
+ print "#ifndef _TUNABLES_H_"
+ print "# error \"Do not include this file directly.\""
+ print "# error \"Include tunables.h instead.\""
+ print "#endif"
+
+ # Now, the enum names
+ print "\ntypedef enum"
+ print "{"
+ for (t in types) {
+ for (n in types[t]) {
+ for (m in types[t][n]) {
+ printf (" TUNABLE_ENUM_NAME(%s, %s, %s),\n", t, n, m);
+ }
+ }
+ }
+ print "} tunable_id_t;\n"
+
+ # Finally, the tunable list.
+ print "\n#ifdef TUNABLES_INTERNAL"
+ print "static tunable_t tunable_list[] = {"
+ for (t in types) {
+ for (n in types[t]) {
+ for (m in types[t][n]) {
+ printf (" {TUNABLE_NAME_S(%s, %s, %s)", t, n, m)
+ printf (", {TUNABLE_TYPE_%s, %s, %s}, {.numval = 0}, NULL, %s, %s},\n",
+ types[t][n][m], minvals[t][n][m], maxvals[t][n][m],
+ is_secure[t][n][m], env_alias[t][n][m]);
+ }
+ }
+ }
+ print "};"
+ print "#endif"
+}