svn commit: r341217 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Thu Nov 29 07:41:05 2018
New Revision: 341217
URL: https://svnweb.freebsd.org/changeset/base/341217

Log:
  Added a O_BENEATH absolute paths test scenario.
  
  Submitted by:	kib@
  Sponsored by:	Dell EMC Isilon

Added:
  user/pho/stress2/misc/beneath.sh   (contents, props changed)

Added: user/pho/stress2/misc/beneath.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/beneath.sh	Thu Nov 29 07:41:05 2018	(r341217)
@@ -0,0 +1,87 @@
+#!/bin/sh
+
+# Test of open(2) with the O_BENEATH flag.
+# Test scenario by kib@
+
+# userret: returning with the following locks held:
+# shared lockmgr ufs (ufs) r = 0 (0xfffff804ec0d2a48) locked @
+# kern/vfs_subr.c:2590 seen in WiP code:
+# https://people.freebsd.org/~pho/stress/log/kostik1126.txt
+
+# $FreeBSD
+
+#. ../default.cfg
+
+top=/tmp/beneath.d
+mkdir -p $top
+cat > $top/beneath.c <<EOF
+/* $Id: beneath.c,v 1.1 2018/10/13 16:53:02 kostik Exp kostik $ */
+
+#include <sys/stat.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifndef O_BENEATH
+#define	O_BENEATH	0x00400000	/* Fail if not under cwd */
+#define	AT_BENEATH		0x1000	/* Fail if not under dirfd */
+#endif
+
+int
+main(int argc, char *argv[])
+{
+	struct stat st;
+	char *name;
+	int error, fd, i;
+
+	for (i = 1; i < argc; i++) {
+		name = argv[i];
+		fd = open(name, O_RDONLY | O_BENEATH);
+		if (fd == -1) {
+			fprintf(stderr, "open(\"%s\") failed, error %d %s\n",
+			    name, errno, strerror(errno));
+		} else {
+			fprintf(stderr, "open(\"%s\") succeeded\n", name);
+			close(fd);
+		}
+		error = fstatat(AT_FDCWD, name, &st, AT_BENEATH);
+		if (error == -1){
+			fprintf(stderr, "stat(\"%s\") failed, error %d %s\n",
+			    name, errno, strerror(errno));
+		} else {
+			fprintf(stderr, "stat(\"%s\") succeeded\n", name);
+		}
+	}
+}
+EOF
+cc -o $top/beneath -Wall -Wextra $top/beneath.c || exit 1
+rm $top/beneath.c
+
+# Test with two directories as arguments:
+cd $top
+mkdir -p a/b
+./beneath a/b
+./beneath $top/a/b
+touch $top/a/c
+./beneath a/c
+./beneath $top/a/c
+./beneath a/d
+./beneath $top/a/d
+
+# CWD is still $top for this test
+top2=/var/tmp/beneath.d
+mkdir -p $top2
+mkdir -p $top2/a/b
+./beneath $top2/a/b > /dev/null 2>&1
+
+touch $top2/a/c
+./beneath $top2/a/c > /dev/null 2>&1
+
+# Other CWDs
+(cd /etc; find . | xargs $top/beneath) > /dev/null 2>&1
+(cd /var; find . | xargs $top/beneath) > /dev/null 2>&1
+
+rm -rf $top $top2
+exit 0