/*
* Copyright (c) 2015 Novell, Inc.
- * Copyright (c) [2018-2022] SUSE LLC
+ * Copyright (c) [2018-2024] SUSE LLC
*
* All Rights Reserved.
*
#include <cstdlib>
#include <unistd.h>
+#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <iostream>
-#include <boost/algorithm/string.hpp>
#include <snapper/Snapper.h>
#include <snapper/AppUtil.h>
#include <snapper/FileUtils.h>
#include <snapper/PluginsImpl.h>
#include "snapper/Log.h"
+#include "snapper/XmlFile.h"
#include "../utils/GetOpts.h"
}
+// Without the rollback support of libsnapper some btrfs utils are undefined.
+#ifdef ENABLE_ROLLBACK
+
+
+bool
+step_filesystem(const string& root_prefix)
+{
+ // create subvolume /<root-prefix>/.snapshots
+
+ cout << "creating btrfs subvolume /<root-prefix>/.snapshots" << endl;
+
+ try
+ {
+ int fd = open(prepend_root_prefix(root_prefix, "/").c_str(),
+ O_RDONLY | O_NOATIME | O_CLOEXEC);
+ if (fd < 0)
+ SN_THROW(Exception("open failed"));
+
+ create_subvolume(fd, ".snapshots");
+
+ close(fd);
+ }
+ catch (const exception& e)
+ {
+ cerr << "creating /<root-prefix>/.snapshots failed" << endl;
+
+ return false;
+ }
+
+ // create /<root-prefix>/.snapshots/1
+
+ cout << "creating directory /<root-prefix>/.snapshots/1" << endl;
+
+ try
+ {
+ if (mkdir(prepend_root_prefix(root_prefix, "/.snapshots/1").c_str(), 0777) != 0)
+ SN_THROW(Exception("mkdir failed"));
+ }
+ catch (const exception& e)
+ {
+ cerr << "creating /<root-prefix>/.snapshots/1 failed" << endl;
+
+ return false;
+ }
+
+ // create btrfs subvolume /<root-prefix>/.snapshots/1/snapshot
+
+ cout << "creating btrfs subvolume /<root-prefix>/.snapshots/1/snapshot" << endl;
+
+ try
+ {
+ int fd = open(prepend_root_prefix(root_prefix, "/.snapshots/1").c_str(),
+ O_RDONLY | O_NOATIME | O_CLOEXEC);
+ if (fd < 0)
+ SN_THROW(Exception("open failed"));
+
+ create_subvolume(fd, "snapshot");
+
+ close(fd);
+ }
+ catch (const exception& e)
+ {
+ cerr << "creating /<root-prefix>/.snapshots/1/snapshot failed" << endl;
+
+ return false;
+ }
+
+ // set default btrfs subvolume to /<root-prefix>/.snapshots/1/snapshot
+
+ cout << "setting default btrfs subvolume to /<root-prefix>/.snapshots/1/snapshot" << endl;
+
+ try
+ {
+ int fd = open(prepend_root_prefix(root_prefix, "/.snapshots/1/snapshot").c_str(),
+ O_RDONLY | O_NOATIME | O_CLOEXEC);
+ if (fd < 0)
+ SN_THROW(Exception("open failed"));
+
+ subvolid_t id = get_id(fd);
+
+ set_default_id(fd, id);
+
+ close(fd);
+ }
+ catch (const exception& e)
+ {
+ cerr << "setting default subvolume failed" << endl;
+
+ return false;
+ }
+
+ // create /<root-prefix>/.snapshots/1/snapshot/.snapshots
+
+ cout << "creating directory /<root-prefix>/.snapshots/1/snapshot/.snapshots" << endl;
+
+ try
+ {
+ if (mkdir(prepend_root_prefix(root_prefix, "/.snapshots/1/snapshot/.snapshots").c_str(), 0777) != 0)
+ SN_THROW(Exception("mkdir failed"));
+ }
+ catch (const exception& e)
+ {
+ cerr << "creating /<root-prefix>/.snapshots/1/snapshot/.snapshots failed" << endl;
+
+ return false;
+ }
+
+ return true;
+}
+
+
+bool
+step_config(const string& root_prefix, const string& description, const string& cleanup,
+ const map<string, string>& userdata)
+{
+ // create directories
+
+ cout << "creating directories in /<root-prefix>" << endl;
+
+ mkdir(prepend_root_prefix(root_prefix, "/etc").c_str(), 0777);
+ mkdir(prepend_root_prefix(root_prefix, "/etc/sysconfig").c_str(), 0777);
+ mkdir(prepend_root_prefix(root_prefix, "/etc/snapper").c_str(), 0777);
+ mkdir(prepend_root_prefix(root_prefix, "/etc/snapper/configs").c_str(), 0777);
+
+ // create snapper sysconfig /<root-prefix>/etc/sysconfig/snapper
+
+ cout << "creating snapper sysconfig /<root-prefix>/etc/sysconfig/snapper" << endl;
+
+ try
+ {
+ /*
+ SysconfigFile sysconfig; // TODO, add in class SysconfigFile
+
+ sysconfig.set_name(prepend_root_prefix(root_prefix, SYSCONFIG_FILE));
+
+ sysconfig.set_value("SNAPPER_CONFIGS", "root");
+
+ sysconfig.save();
+ */
+
+ AsciiFileWriter sysconfig(prepend_root_prefix(root_prefix, SYSCONFIG_FILE), Compression::NONE);
+
+ sysconfig.write_line("SNAPPER_CONFIGS=\"root\"");
+
+ sysconfig.close();
+ }
+ catch (const Exception& e)
+ {
+ cerr << "setup of /<root-prefix>/etc/sysconfig/snapper failed, "
+ << e.what() << endl;
+
+ return false;
+ }
+
+ // create snapper config /<root-prefix>/etc/snapper/configs/root
+
+ cout << "creating snapper config /<root-prefix>/etc/snapper/configs/root" << endl;
+
+ try
+ {
+ string template_file = locate_file("default", ETC_CONFIG_TEMPLATE_DIR, USR_CONFIG_TEMPLATE_DIR);
+
+ SysconfigFile config(template_file);
+
+ config.set_name(prepend_root_prefix(root_prefix, CONFIGS_DIR "/root"));
+
+ config.set_value(KEY_SUBVOLUME, "/");
+ config.set_value(KEY_FSTYPE, "btrfs");
+
+ config.save();
+ }
+ catch (const Exception& e)
+ {
+ cerr << "setup of /<root-prefix>/etc/snapper/configs/root failed, "
+ << e.what() << endl;
+
+ return false;
+ }
+
+ // create info file /<root-prefix>/.snapshots/1/info.xml
+
+ cout << "creating snapper info file /<root-prefix>/.snapshots/1/info.xml" << endl;
+
+ try
+ {
+ XmlFile xml;
+ xmlNode* node = xmlNewNode("snapshot");
+ xml.setRootElement(node);
+
+ setChildValue(node, "type", toString(SINGLE));
+
+ setChildValue(node, "num", 1);
+
+ setChildValue(node, "date", datetime(time(NULL), true, true));
+
+ if (!description.empty())
+ setChildValue(node, "description", description);
+
+ if (!cleanup.empty())
+ setChildValue(node, "cleanup", cleanup);
+
+ for (const map<string, string>::value_type& tmp : userdata)
+ {
+ xmlNode* userdata_node = xmlNewChild(node, "userdata");
+ setChildValue(userdata_node, "key", tmp.first);
+ setChildValue(userdata_node, "value", tmp.second);
+ }
+
+ int fd = open(prepend_root_prefix(root_prefix, "/.snapshots/1/info.xml").c_str(),
+ O_RDWR | O_CREAT | O_CLOEXEC, 0666);
+ if (fd < 0)
+ SN_THROW(Exception("open failed"));
+
+ fchmod(fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+
+ xml.save(fd);
+ }
+ catch (const Exception& e)
+ {
+ SN_CAUGHT(e);
+
+ cerr << "setup of /<root-prefix>/.snapshots/1/info.xml failed, "
+ << e.what() << endl;
+
+ return false;
+ }
+
+ return true;
+}
+
+#endif
+
+
void
log_do(LogLevel level, const string& component, const char* file, const int line, const char* func,
const string& text)
step4();
else if (step == "5")
return step5(root_prefix, snapshot_type, pre_num, description, cleanup, userdata) ? EXIT_SUCCESS : EXIT_FAILURE;
+
+#ifdef ENABLE_ROLLBACK
+
+ else if (step == "filesystem")
+ return step_filesystem(root_prefix) ? EXIT_SUCCESS : EXIT_FAILURE;
+ else if (step == "config")
+ return step_config(root_prefix, description, cleanup, userdata) ? EXIT_SUCCESS : EXIT_FAILURE;
+
+#endif
+
}
projects / thirdparty / snapper.git / commitdiff
