Support OA_LEN for VC#4035

src/tus_concat.h

@@ -34,6 +34,7 @@ struct tus_concat {
 	unsigned		magic;
 #define TUS_CONCAT_MAGIC	0x105c0ca7
 	unsigned		n;
+	uint64_t		len; // filled by tus_objgetattr()
 	struct tus_file_core	*cores[];
 	// dynamically sized
 };

src/tus_stv.c

@@ -40,6 +40,28 @@
 #include "tus_concat.h"
 #include "tus_stv.h"
 
+/* from varnish-cache vend.h */
+static __inline void
+vbe32enc(void *pp, uint32_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	p[0] = (u >> 24) & 0xff;
+	p[1] = (u >> 16) & 0xff;
+	p[2] = (u >> 8) & 0xff;
+	p[3] = u & 0xff;
+}
+
+static __inline void
+vbe64enc(void *pp, uint64_t u)
+{
+	uint8_t *p = (uint8_t *)pp;
+
+	vbe32enc(p, (uint32_t)(u >> 32));
+	vbe32enc(p + 4, (uint32_t)(u & 0xffffffffU));
+}
+
+
 static void
 tus_objfree(struct worker *wrk, struct objcore *oc);
 static int
@@ -216,13 +238,34 @@ tus_objextend(struct worker *wrk, struct objcore *oc, ssize_t l)
 
 static const void *
 tus_objgetattr(struct worker *wrk, struct objcore *oc,
-enum obj_attr attr, ssize_t *len)
+    enum obj_attr attr, ssize_t *len)
 {
+	struct tus_file_core *fcore;
+	struct tus_concat *c;
+	unsigned i;
+	uint64_t l;
+
 	(void) wrk;
-	(void) oc;
-	(void) attr;
-	(void) len;
+
+	CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC);
+	assert(oc->stobj->stevedore == &stv_tus);
+
+	CAST_OBJ_NOTNULL(c, oc->stobj->priv, TUS_CONCAT_MAGIC);
+
+	switch (attr) {
+	case OA_LEN:
+		l = 0;
+		for (i = 0; i < c->n; i++) {
+			fcore = c->cores[i];
+			CHECK_OBJ_NOTNULL(fcore, VMOD_TUS_FILE_CORE_MAGIC);
+			l += fcore->len;
+		}
+		vbe64enc(&c->len, l);
+		*len = sizeof(c->len);
+		return (&c->len);
+	default:
 		INCOMPL();
+	}
 }
 
 static void *