+#include <sys/param.h>
+#include <sys/mount.h>
+#include <sys/vnode.h>
+
+struct vnodeop_desc vop_default_desc = {
+ 0,
+ "default",
+ 0,
+ NULL,
+ VDESC_NO_OFFSET,
+ VDESC_NO_OFFSET,
+ VDESC_NO_OFFSET,
+ VDESC_NO_OFFSET,
+ NULL,
+};
+
+END_OF_LEADING_COMMENT
+
+# Awk script to take vnode_if.src and turn it into vnode_if.c.
+$AWK 'function kill_surrounding_ws (s) {
+ sub (/^[ \t]*/, "", s);
+ sub (/[ \t]*$/, "", s);
+ return s;
+ }
+
+ function read_args() {
+ numargs = 0;
+ while (getline ln) {
+ if (ln ~ /}/) {
+ break;
+ };
+
+ # Delete comments, if any.
+ gsub (/\/\*.*\*\//, "", ln);
+
+ # Delete leading/trailing space.
+ ln = kill_surrounding_ws(ln);
+
+ # Pick off direction.
+ if (1 == sub(/^INOUT[ \t]+/, "", ln))
+ dir = "INOUT";
+ else if (1 == sub(/^IN[ \t]+/, "", ln))
+ dir = "IN";
+ else if (1 == sub(/^OUT[ \t]+/, "", ln))
+ dir = "OUT";
+ else
+ bail("No IN/OUT direction for \"" ln "\".");
+
+ # check for "WILLRELE"
+ if (1 == sub(/^WILLRELE[ \t]+/, "", ln)) {
+ rele = "WILLRELE";
+ } else {
+ rele = "WONTRELE";
+ };
+
+ # kill trailing ;
+ if (1 != sub (/;$/, "", ln)) {
+ bail("Missing end-of-line ; in \"" ln "\".");
+ };
+
+ # pick off variable name
+ if (!(i = match(ln, /[A-Za-z0-9_]+$/))) {
+ bail("Missing var name \"a_foo\" in \"" ln "\".");
+ };
+ arg = substr (ln, i);
+ # Want to <<substr(ln, i) = "";>>, but nawk cannot.
+ # Hack around this.
+ ln = substr(ln, 1, i-1);
+
+ # what is left must be type
+ # (put clean it up some)
+ type = ln;
+ gsub (/[ \t]+/, " ", type); # condense whitespace
+ type = kill_surrounding_ws(type);
+
+ # (boy this was easier in Perl)
+
+ numargs++;
+ dirs[numargs] = dir;
+ reles[numargs] = rele;
+ types[numargs] = type;
+ args[numargs] = arg;
+ };
+ }
+
+ function generate_operation_vp_offsets() {
+ printf ("int %s_vp_offsets[] = {\n", name);
+ # as a side effect, figure out the releflags
+ releflags = "";
+ vpnum = 0;
+ for (i=1; i<=numargs; i++) {
+ if (types[i] == "struct vnode *") {
+ printf ("\tVOPARG_OFFSETOF(struct %s_args,a_%s),\n",
+ name, args[i]);
+ if (reles[i] == "WILLRELE") {
+ releflags = releflags "|VDESC_VP" vpnum "_WILLRELE";
+ };
+ vpnum++;
+ };
+ };
+ sub (/^\|/, "", releflags);
+ print "\tVDESC_NO_OFFSET";
+ print "};";
+ }
+
+ function find_arg_with_type (type) {
+ for (i=1; i<=numargs; i++) {
+ if (types[i] == type) {
+ return "VOPARG_OFFSETOF(struct " name "_args,a_" args[i] ")";
+ };
+ };
+ return "VDESC_NO_OFFSET";
+ }
+
+ function generate_operation_desc() {
+ printf ("struct vnodeop_desc %s_desc = {\n", name);
+ # offset
+ printf ("\t0,\n");
+ # printable name
+ printf ("\t\"%s\",\n", name);
+ # flags
+ vppwillrele = "";
+ for (i=1; i<=numargs; i++) {
+ if (types[i] == "struct vnode **" &&
+ (reles[i] == "WILLRELE")) {
+ vppwillrele = "|VDESC_VPP_WILLRELE";
+ };
+ };
+ if (releflags == "") {
+ printf ("\t0%s,\n", vppwillrele);
+ } else {
+ printf ("\t%s%s,\n", releflags, vppwillrele);
+ };
+ # vp offsets
+ printf ("\t%s_vp_offsets,\n", name);
+ # vpp (if any)
+ printf ("\t%s,\n", find_arg_with_type("struct vnode **"));
+ # cred (if any)
+ printf ("\t%s,\n", find_arg_with_type("struct ucred *"));
+ # proc (if any)
+ printf ("\t%s,\n", find_arg_with_type("struct proc *"));
+ # componentname
+ printf ("\t%s,\n", find_arg_with_type("struct componentname *"));
+ # transport layer information
+ printf ("\tNULL,\n};\n");
+ }
+
+ NF == 0 || $0 ~ "^#" {
+ next;
+ }
+ {
+ # get the function name
+ name = $1;
+
+ # get the function arguments
+ read_args();
+
+ # Print out the vop_F_vp_offsets structure. This all depends
+ # on naming conventions and nothing else.
+ generate_operation_vp_offsets();
+
+ # Print out the vnodeop_desc structure.
+ generate_operation_desc();
+
+ printf "\n";
+
+ }' < $SRC >> $CFILE
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