Added nfs4_lookup_root and nfs_fh parsing

2 files changed, 60 insertions, 0 deletions

diff --git a/nfs4_lookup_root.stp b/nfs4_lookup_root.stp
new file mode 100644
index 0000000..592af25
--- /dev/null
+++ b/nfs4_lookup_root.stp
@@ -0,0 +1,19 @@
+global lookup_root_fh
+
+probe module("nfs").function("nfs4_lookup_root")
+{
+	printf("nfs4_lookup_root: server %p fhandle %p info %p\n",
+		$server, $fhandle, $info);
+	lookup_root_fh = $fhandle;
+}
+probe module("nfs").function("nfs4_lookup_root").return
+{
+	if ($return) {
+		printf("nfs4_lookup_root: %d\n", $return);
+	} else {
+		printf("nfs4_lookup_root: %s\n", nfsfh(lookup_root_fh));
+	}
+}
+
+probe begin { log("starting nfs4_lookup_root probe") }
+probe end { log("ending nfs4_lookup_root probe") }
diff --git a/tapset/nfs_fh.stp b/tapset/nfs_fh.stp
new file mode 100644
index 0000000..f4f21d4
--- /dev/null
+++ b/tapset/nfs_fh.stp
@@ -0,0 +1,41 @@
+
+%{
+#include <linux/nfs.h>
+%}
+
+
+function nfsfh:string(_nfsfh:long)
+%{
+	struct nfs_fh *fh = (struct nfs_fh *)(long) kread(&(THIS->_nfsfh));
+	char buf[MAXSTRINGLEN], *str, octet[10];
+	int cc=0, i, j;
+
+	unsigned short ofs, len;
+
+    sprintf(buf+cc, "fh: %d: ", fh->size);
+	cc = strlen(buf);
+
+	str = buf+cc;
+	len = fh->size;
+	for (ofs = 0; ofs < len; ofs += 16) {
+		/*
+		sprintf(str, "%03d: ", ofs );
+		*/
+		for (i=0; i < 16; i++) {
+			if ((i + ofs) < len)
+				sprintf(octet, "%02x", fh->data[ofs + i]);
+			else
+				strcpy(octet, "  ");
+			 strcat(str, octet);
+		}
+		/*
+		strcat(str, "  \n");
+		*/
+		j = strlen(str);
+		str += j;
+	}
+
+	snprintf(THIS->__retvalue, MAXSTRINGLEN, "%s", buf); 
+
+	CATCH_DEREF_FAULT();
+%}