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/** |
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* This file is part of the CernVM File System. |
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*/ |
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#include "swissknife_reflog.h" |
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#include <cassert> |
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#include <string> |
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#include <vector> |
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#include "manifest.h" |
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#include "object_fetcher.h" |
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#include "upload_facility.h" |
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#include "util/exception.h" |
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namespace swissknife { |
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typedef HttpObjectFetcher<> ObjectFetcher; |
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class RootChainWalker { |
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public: |
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typedef ObjectFetcher::CatalogTN CatalogTN; |
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typedef ObjectFetcher::HistoryTN HistoryTN; |
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public: |
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RootChainWalker(const manifest::Manifest *manifest, |
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ObjectFetcher *object_fetcher, |
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manifest::Reflog *reflog) |
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: object_fetcher_(object_fetcher) |
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, reflog_(reflog) |
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, manifest_(manifest) {} |
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void FindObjectsAndPopulateReflog(); |
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protected: |
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typedef std::vector<shash::Any> CatalogList; |
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protected: |
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CatalogTN* FetchCatalog(const shash::Any catalog_hash); |
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HistoryTN* FetchHistory(const shash::Any history_hash); |
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void WalkRootCatalogs(const shash::Any &root_catalog_hash); |
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void WalkHistories(const shash::Any &history_hash); |
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bool WalkCatalogsInHistory(const HistoryTN *history); |
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void WalkListedCatalogs(const CatalogList &catalog_list); |
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template <class DatabaseT> |
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DatabaseT* ReturnOrAbort(const ObjectFetcherFailures::Failures failure, |
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const shash::Any &content_hash, |
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DatabaseT *database); |
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private: |
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ObjectFetcher *object_fetcher_; |
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manifest::Reflog *reflog_; |
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const manifest::Manifest *manifest_; |
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}; |
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ParameterList CommandReconstructReflog::GetParams() const { |
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ParameterList r; |
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r.push_back(Parameter::Mandatory('r', "repository url")); |
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r.push_back(Parameter::Mandatory('u', "spooler definition string")); |
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r.push_back(Parameter::Mandatory('n', "fully qualified repository name")); |
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r.push_back(Parameter::Mandatory('t', "temporary directory")); |
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r.push_back(Parameter::Mandatory('k', "repository keychain")); |
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r.push_back(Parameter::Mandatory('R', "path to reflog.chksum file")); |
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r.push_back(Parameter::Optional('@', "proxy url")); |
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return r; |
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} |
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int CommandReconstructReflog::Main(const ArgumentList &args) { |
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const std::string &repo_url = *args.find('r')->second; |
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const std::string &spooler = *args.find('u')->second; |
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const std::string &repo_name = *args.find('n')->second; |
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const std::string &tmp_dir = *args.find('t')->second; |
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const std::string &repo_keys = *args.find('k')->second; |
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const std::string &reflog_chksum_path = *args.find('R')->second; |
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const bool follow_redirects = false; |
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const std::string proxy = ((args.count('@') > 0) ? |
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*args.find('@')->second : ""); |
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if (!this->InitDownloadManager(follow_redirects, proxy) || |
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!this->InitSignatureManager(repo_keys)) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "failed to init repo connection"); |
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return 1; |
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} |
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ObjectFetcher object_fetcher(repo_name, |
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repo_url, |
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tmp_dir, |
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download_manager(), |
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signature_manager()); |
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UniquePtr<manifest::Manifest> manifest; |
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ObjectFetcher::Failures retval = object_fetcher.FetchManifest(&manifest); |
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if (retval != ObjectFetcher::kFailOk) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "failed to load repository manifest " |
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"(%d - %s)", |
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retval, Code2Ascii(retval)); |
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return 1; |
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} |
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const upload::SpoolerDefinition spooler_definition(spooler, shash::kAny); |
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UniquePtr<upload::AbstractUploader> uploader( |
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upload::AbstractUploader::Construct(spooler_definition)); |
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if (!uploader.IsValid()) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "failed to initialize spooler for '%s'", |
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spooler.c_str()); |
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return 1; |
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} |
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UniquePtr<manifest::Reflog> reflog(CreateEmptyReflog(tmp_dir, repo_name)); |
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reflog->TakeDatabaseFileOwnership(); |
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reflog->BeginTransaction(); |
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AddStaticManifestObjects(reflog.weak_ref(), manifest.weak_ref()); |
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RootChainWalker walker(manifest.weak_ref(), |
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&object_fetcher, |
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reflog.weak_ref()); |
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walker.FindObjectsAndPopulateReflog(); |
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reflog->CommitTransaction(); |
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LogCvmfs(kLogCvmfs, kLogStdout, "found %lu entries", reflog->CountEntries()); |
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reflog->DropDatabaseFileOwnership(); |
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const std::string reflog_db = reflog->database_file(); |
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reflog.Destroy(); |
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uploader->UploadFile(reflog_db, ".cvmfsreflog"); |
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shash::Any reflog_hash(manifest->GetHashAlgorithm()); |
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manifest::Reflog::HashDatabase(reflog_db, &reflog_hash); |
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uploader->WaitForUpload(); |
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unlink(reflog_db.c_str()); |
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const int errors = uploader->GetNumberOfErrors(); |
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if (errors > 0) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "failed to upload generated Reflog"); |
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} |
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uploader->TearDown(); |
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manifest::Reflog::WriteChecksum(reflog_chksum_path, reflog_hash); |
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return (errors == 0) ? 0 : 1; |
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} |
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void CommandReconstructReflog::AddStaticManifestObjects( |
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manifest::Reflog *reflog, |
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manifest::Manifest *manifest) const { |
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const shash::Any certificate = manifest->certificate(); |
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const shash::Any meta_info = manifest->meta_info(); |
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assert(!certificate.IsNull()); |
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bool success = reflog->AddCertificate(certificate); |
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assert(success); |
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LogCvmfs(kLogCvmfs, kLogStdout, "Certificate: %s", |
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certificate.ToString().c_str()); |
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if (!meta_info.IsNull()) { |
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success = reflog->AddMetainfo(meta_info); |
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assert(success); |
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LogCvmfs(kLogCvmfs, kLogStdout, "Metainfo: %s", |
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meta_info.ToString().c_str()); |
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} |
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} |
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void RootChainWalker::FindObjectsAndPopulateReflog() { |
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const shash::Any root_catalog = manifest_->catalog_hash(); |
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const shash::Any history = manifest_->history(); |
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assert(!root_catalog.IsNull()); |
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WalkRootCatalogs(root_catalog); |
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if (!history.IsNull()) { |
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WalkHistories(history); |
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} |
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} |
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void RootChainWalker::WalkRootCatalogs(const shash::Any &root_catalog_hash) { |
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shash::Any current_hash = root_catalog_hash; |
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UniquePtr<CatalogTN> current_catalog; |
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while (!current_hash.IsNull() && |
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!reflog_->ContainsCatalog(current_hash) && |
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(current_catalog = FetchCatalog(current_hash)).IsValid()) { |
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LogCvmfs(kLogCvmfs, kLogStdout, "Catalog: %s Revision: %" PRIu64, |
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current_hash.ToString().c_str(), current_catalog->GetRevision()); |
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const bool success = reflog_->AddCatalog(current_hash); |
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assert(success); |
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current_hash = current_catalog->GetPreviousRevision(); |
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} |
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} |
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void RootChainWalker::WalkHistories(const shash::Any &history_hash) { |
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shash::Any current_hash = history_hash; |
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UniquePtr<HistoryTN> current_history; |
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while (!current_hash.IsNull() && |
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!reflog_->ContainsHistory(current_hash) && |
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(current_history = FetchHistory(current_hash)).IsValid()) { |
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LogCvmfs(kLogCvmfs, kLogStdout, "History: %s", |
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current_hash.ToString().c_str()); |
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bool cancel = WalkCatalogsInHistory(current_history.weak_ref()); |
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const bool success = reflog_->AddHistory(current_hash); |
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assert(success); |
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if (cancel) { |
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current_hash = shash::Any(current_hash.algorithm); |
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} else { |
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current_hash = current_history->previous_revision(); |
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} |
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} |
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} |
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/** |
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* If false is returned, it indicates that the history database comes from |
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* an early pre-release of the history functionality. The WalkHistory() |
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* iteration will subsequently stop. This is necessary, for instance, to |
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* handle the cernvm-prod.cern.ch repository. |
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*/ |
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bool RootChainWalker::WalkCatalogsInHistory(const HistoryTN *history) { |
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CatalogList tag_hashes; |
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const bool list_success = history->GetHashes(&tag_hashes); |
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assert(list_success); |
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CatalogList bin_hashes; |
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const bool bin_success = history->ListRecycleBin(&bin_hashes); |
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if (!bin_success) { |
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LogCvmfs(kLogCvmfs, kLogStderr, " Warning: 'recycle bin' table missing"); |
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} |
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WalkListedCatalogs(tag_hashes); |
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WalkListedCatalogs(bin_hashes); |
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return !bin_success; |
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} |
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void RootChainWalker::WalkListedCatalogs( |
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const RootChainWalker::CatalogList &catalog_list) { |
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CatalogList::const_iterator i = catalog_list.begin(); |
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CatalogList::const_iterator iend = catalog_list.end(); |
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for (; i != iend; ++i) { |
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WalkRootCatalogs(*i); |
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} |
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} |
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RootChainWalker::CatalogTN* RootChainWalker::FetchCatalog( |
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const shash::Any catalog_hash) { |
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CatalogTN *catalog = NULL; |
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const char *root_path = ""; |
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ObjectFetcherFailures::Failures failure = |
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object_fetcher_->FetchCatalog(catalog_hash, root_path, &catalog); |
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return ReturnOrAbort(failure, catalog_hash, catalog); |
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} |
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RootChainWalker::HistoryTN* RootChainWalker::FetchHistory( |
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const shash::Any history_hash) { |
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HistoryTN *history = NULL; |
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ObjectFetcherFailures::Failures failure = |
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object_fetcher_->FetchHistory(&history, history_hash); |
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return ReturnOrAbort(failure, history_hash, history); |
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} |
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template <class DatabaseT> |
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DatabaseT* RootChainWalker::ReturnOrAbort( |
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const ObjectFetcherFailures::Failures failure, |
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const shash::Any &content_hash, |
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DatabaseT *database) { |
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switch (failure) { |
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case ObjectFetcherFailures::kFailOk: |
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return database; |
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case ObjectFetcherFailures::kFailNotFound: |
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return NULL; |
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default: |
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PANIC(kLogStderr, "Failed to load object '%s' (%d - %s)", |
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content_hash.ToStringWithSuffix().c_str(), failure, |
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Code2Ascii(failure)); |
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} |
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} |
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} // namespace swissknife |
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