UCS Bug: https://forge.univention.org/bugzilla/show_bug.cgi?id=33751

New Samba share option "acl xattr update mtime" to make vfs_acl_xattr update the modification time of a file while setting NTACLs (default: false).

--- a/lib/param/param_table.c	2014-01-06 13:06:42.000000000 +0100
+++ b/lib/param/param_table.c	2014-01-06 13:06:46.000000000 +0100
@@ -4365,6 +4365,15 @@
 		.special	= NULL,
 		.enum_list	= NULL
 	},
+	{
+		.label		= "acl xattr update mtime",
+		.type		= P_BOOL,
+		.p_class	= P_LOCAL,
+		.offset		= LOCAL_VAR(bAclXattrUpdateMtime),
+		.special	= NULL,
+		.enum_list	= NULL,
+		.flags		= FLAG_ADVANCED | FLAG_SHARE,
+	},
 
 	{NULL,  P_BOOL,  P_NONE,  0,  NULL,  NULL,  0}
 };
--- a/source3/param/loadparm.c	2014-01-06 20:45:53.000000000 +0100
+++ b/source3/param/loadparm.c	2014-01-06 15:41:32.000000000 +0100
@@ -279,6 +279,7 @@
 	.ismb_encrypt = SMB_SIGNING_DEFAULT,
 	.bKernelShareModes = true,
 	.bDurableHandles = true,
+	.bAclXattrUpdateMtime = false,
 	.param_opt = NULL,
 	.dummy = ""
 };
--- a/lib/param/param_functions.c	2014-01-06 20:42:54.000000000 +0100
+++ b/lib/param/param_functions.c	2014-01-06 15:42:46.000000000 +0100
@@ -152,6 +152,7 @@
 FN_LOCAL_PARM_BOOL(change_notify, bChangeNotify)
 FN_LOCAL_PARM_BOOL(kernel_change_notify, bKernelChangeNotify)
 FN_LOCAL_BOOL(durable_handles, bDurableHandles)
+FN_LOCAL_BOOL(acl_xattr_update_mtime, bAclXattrUpdateMtime)
 
 FN_GLOBAL_BOOL(allow_insecure_widelinks, bAllowInsecureWidelinks)
 FN_GLOBAL_BOOL(allow_trusted_domains, bAllowTrustedDomains)
--- a/source3/modules/vfs_acl_common.c	2014-01-06 13:09:17.000000000 +0100
+++ b/source3/modules/vfs_acl_common.c	2014-01-06 13:08:54.000000000 +0100
@@ -814,6 +814,20 @@
 		}
 	}
 
+	if (lp_acl_xattr_update_mtime(SNUM(handle->conn))) {
+		DEBUG(10,("fset_nt_acl_xattr: updating mtime of %s (fd: %d)\n",
+			   fsp_str_dbg(fsp), fsp->fh->fd));
+		if (fsp->fh->fd != -1) {
+			ret = futimes(fsp->fh->fd, NULL);
+		} else {
+			ret = utime(fsp->fsp_name->base_name, NULL);
+		}
+		if (ret != 0) {
+			DEBUG(10,("fset_nt_acl_xattr: error updating mtime: %s\n",
+					strerror(errno)));
+		}
+	}
+
 	/* Get the full underlying sd, then hash. */
 	status = SMB_VFS_NEXT_FGET_NT_ACL(handle,
 					  fsp,