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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 "sync_union_aufs.h" |
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#include <string> |
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#include "sync_mediator.h" |
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#include "sync_union.h" |
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#include "util/fs_traversal.h" |
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namespace publish { |
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SyncUnionAufs::SyncUnionAufs(SyncMediator *mediator, |
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const std::string &rdonly_path, |
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const std::string &union_path, |
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const std::string &scratch_path) |
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: SyncUnion(mediator, rdonly_path, union_path, scratch_path) { |
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// Ignored filenames |
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ignore_filenames_.insert(".wh..wh..tmp"); |
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ignore_filenames_.insert(".wh..wh.plnk"); |
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ignore_filenames_.insert(".wh..wh.aufs"); |
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ignore_filenames_.insert(".wh..wh.orph"); |
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ignore_filenames_.insert(".wh..wh..opq"); |
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// set the whiteout prefix AUFS precedes for every whiteout file |
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whiteout_prefix_ = ".wh."; |
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} |
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void SyncUnionAufs::Traverse() { |
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assert(this->IsInitialized()); |
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FileSystemTraversal<SyncUnionAufs> traversal(this, scratch_path(), true); |
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traversal.fn_enter_dir = &SyncUnionAufs::EnterDirectory; |
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traversal.fn_leave_dir = &SyncUnionAufs::LeaveDirectory; |
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traversal.fn_new_file = &SyncUnionAufs::ProcessRegularFile; |
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traversal.fn_ignore_file = &SyncUnionAufs::IgnoreFilePredicate; |
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traversal.fn_new_dir_prefix = &SyncUnionAufs::ProcessDirectory; |
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traversal.fn_new_symlink = &SyncUnionAufs::ProcessSymlink; |
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traversal.fn_new_character_dev = &SyncUnionAufs::ProcessCharacterDevice; |
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traversal.fn_new_block_dev = &SyncUnionAufs::ProcessBlockDevice; |
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traversal.fn_new_fifo = &SyncUnionAufs::ProcessFifo; |
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traversal.fn_new_socket = &SyncUnionAufs::ProcessSocket; |
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LogCvmfs(kLogUnionFs, kLogVerboseMsg, |
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"Aufs starting traversal " |
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"recursion for scratch_path=[%s] with external data set to %d", |
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scratch_path().c_str(), mediator_->IsExternalData()); |
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traversal.Recurse(scratch_path()); |
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} |
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bool SyncUnionAufs::IsWhiteoutEntry(SharedPtr<SyncItem> entry) const { |
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return entry->filename().substr(0, whiteout_prefix_.length()) |
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== whiteout_prefix_; |
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} |
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bool SyncUnionAufs::IsOpaqueDirectory(SharedPtr<SyncItem> directory) const { |
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return FileExists(directory->GetScratchPath() + "/.wh..wh..opq"); |
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} |
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string SyncUnionAufs::UnwindWhiteoutFilename(SharedPtr<SyncItem> entry) const { |
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const std::string &filename = entry->filename(); |
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return filename.substr(whiteout_prefix_.length()); |
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} |
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bool SyncUnionAufs::IgnoreFilePredicate(const string &parent_dir, |
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const string &filename) { |
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return SyncUnion::IgnoreFilePredicate(parent_dir, filename) |
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|| (ignore_filenames_.find(filename) != ignore_filenames_.end()); |
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} |
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} // namespace publish |
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