mount: move generic functions to utils.c and network.c

Move generic code that could be shared between standard mount.nfs and
libmount version to utils.c and network.c.

CC: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Steve Dickson <steved@redhat.com>

1 files changed, 175 insertions, 0 deletions

diff --git a/utils/mount/utils.c b/utils/mount/utils.c
new file mode 100644
index 0000000..298db39
--- /dev/null
+++ b/utils/mount/utils.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2010 Karel Zak <kzak@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "sockaddr.h"
+#include "nfs_mount.h"
+#include "nls.h"
+#include "xcommon.h"
+#include "version.h"
+#include "error.h"
+#include "utils.h"
+#include "mount.h"
+#include "network.h"
+#include "parse_dev.h"
+
+extern int verbose;
+extern char *progname;
+
+/*
+ * Choose the version of the nfs_mount_data structure that is appropriate
+ * for the kernel that is doing the mount.
+ *
+ * NFS_MOUNT_VERSION:		maximum version supported by these sources
+ * nfs_mount_data_version:	maximum version supported by the running kernel
+ */
+int discover_nfs_mount_data_version(int *string_ver)
+{
+	unsigned int kernel_version = linux_version_code();
+	int ver = 0;
+
+	*string_ver = 0;
+
+	if (kernel_version) {
+		if (kernel_version < MAKE_VERSION(2, 1, 32))
+			ver = 1;
+		else if (kernel_version < MAKE_VERSION(2, 2, 18))
+			ver = 3;
+		else if (kernel_version < MAKE_VERSION(2, 3, 0))
+			ver = 4;
+		else if (kernel_version < MAKE_VERSION(2, 3, 99))
+			ver = 3;
+		else if (kernel_version < MAKE_VERSION(2, 6, 3))
+			ver = 4;
+		else
+			ver = 6;
+	}
+	if (ver > NFS_MOUNT_VERSION)
+		ver = NFS_MOUNT_VERSION;
+	else
+		if (kernel_version > MAKE_VERSION(2, 6, 22))
+			(*string_ver)++;
+
+	return ver;
+}
+
+void print_one(char *spec, char *node, char *type, char *opts)
+{
+	if (!verbose)
+		return;
+
+	if (opts)
+		printf(_("%s on %s type %s (%s)\n"), spec, node, type, opts);
+	else
+		printf(_("%s on %s type %s\n"), spec, node, type);
+}
+
+void mount_usage(void)
+{
+	printf(_("usage: %s remotetarget dir [-rvVwfnsih] [-o nfsoptions]\n"),
+		progname);
+	printf(_("options:\n"));
+	printf(_("\t-r\t\tMount file system readonly\n"));
+	printf(_("\t-v\t\tVerbose\n"));
+	printf(_("\t-V\t\tPrint version\n"));
+	printf(_("\t-w\t\tMount file system read-write\n"));
+	printf(_("\t-f\t\tFake mount, do not actually mount\n"));
+	printf(_("\t-n\t\tDo not update /etc/mtab\n"));
+	printf(_("\t-s\t\tTolerate sloppy mount options rather than fail\n"));
+	printf(_("\t-h\t\tPrint this help\n"));
+	printf(_("\tnfsoptions\tRefer to mount.nfs(8) or nfs(5)\n\n"));
+}
+
+void umount_usage(void)
+{
+	printf(_("usage: %s dir [-fvnrlh]\n"), progname);
+	printf(_("options:\n\t-f\t\tforce unmount\n"));
+	printf(_("\t-v\tverbose\n"));
+	printf(_("\t-n\tDo not update /etc/mtab\n"));
+	printf(_("\t-r\tremount\n"));
+	printf(_("\t-l\tlazy unmount\n"));
+	printf(_("\t-h\tprint this help\n\n"));
+}
+
+int chk_mountpoint(const char *mount_point)
+{
+	struct stat sb;
+
+	if (stat(mount_point, &sb) < 0){
+		mount_error(NULL, mount_point, errno);
+		return 1;
+	}
+	if (S_ISDIR(sb.st_mode) == 0){
+		mount_error(NULL, mount_point, ENOTDIR);
+		return 1;
+	}
+	if (access(mount_point, X_OK) < 0) {
+		mount_error(NULL, mount_point, errno);
+		return 1;
+	}
+
+	return 0;
+}
+
+/*
+ * Pick up certain mount options used during the original mount
+ * from /etc/mtab.  The basics include the server's IP address and
+ * the server pathname of the share to unregister.
+ *
+ * These options might also describe the mount port, mount protocol
+ * version, and transport protocol used to punch through a firewall.
+ * We will need this information to get through the firewall again
+ * to do the umount.
+ *
+ * Note that option parsing failures won't necessarily cause the
+ * umount request to fail.  Those values will be left zero in the
+ * pmap tuple.  If the GETPORT call later fails to disambiguate them,
+ * then we fail.
+ */
+int nfs_umount23(const char *devname, char *string)
+{
+	char *hostname = NULL, *dirname = NULL;
+	struct mount_options *options;
+	int result = EX_FAIL;
+
+	if (!nfs_parse_devname(devname, &hostname, &dirname))
+		return EX_USAGE;
+
+	options = po_split(string);
+	if (options) {
+		result = nfs_umount_do_umnt(options, &hostname, &dirname);
+		po_destroy(options);
+	} else
+		nfs_error(_("%s: option parsing error"), progname);
+
+	free(hostname);
+	free(dirname);
+	return result;
+}