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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "FileSystemDatabaseManagerVersion001.h"
#include "ErrorList.h"
#include "FileSystemContentTypeGuess.h"
#include "FileSystemDataManager.h"
#include "FileSystemFileManager.h"
#include "FileSystemParentTypes.h"
#include "ResultStatement.h"
#include "StartedTransaction.h"
#include "mozStorageHelper.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/dom/FileSystemDataManager.h"
#include "mozilla/dom/FileSystemHandle.h"
#include "mozilla/dom/FileSystemLog.h"
#include "mozilla/dom/FileSystemTypes.h"
#include "mozilla/dom/PFileSystemManager.h"
#include "mozilla/dom/quota/Client.h"
#include "mozilla/dom/quota/QuotaCommon.h"
#include "mozilla/dom/quota/QuotaManager.h"
#include "mozilla/dom/quota/QuotaObject.h"
#include "mozilla/dom/quota/ResultExtensions.h"
#include "nsString.h"
namespace mozilla::dom {
using FileSystemEntries = nsTArray<fs::FileSystemEntryMetadata>;
namespace fs::data {
namespace {
constexpr const nsLiteralCString gDescendantsQuery =
"WITH RECURSIVE traceChildren(handle, parent) AS ( "
"SELECT handle, parent "
"FROM Entries "
"WHERE handle=:handle "
"UNION "
"SELECT Entries.handle, Entries.parent FROM traceChildren, Entries "
"WHERE traceChildren.handle=Entries.parent ) "
"SELECT handle "
"FROM traceChildren INNER JOIN Files "
"USING(handle) "
";"_ns;
Result<bool, QMResult> IsDirectoryEmpty(const FileSystemConnection& mConnection,
const EntryId& aEntryId) {
const nsLiteralCString isDirEmptyQuery =
"SELECT EXISTS ("
"SELECT 1 FROM Entries WHERE parent = :parent "
");"_ns;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(mConnection, isDirEmptyQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("parent"_ns, aEntryId)));
QM_TRY_UNWRAP(bool childrenExist, stmt.YesOrNoQuery());
return !childrenExist;
}
Result<bool, QMResult> DoesDirectoryExist(
const FileSystemConnection& mConnection,
const FileSystemChildMetadata& aHandle) {
MOZ_ASSERT(!aHandle.parentId().IsEmpty());
const nsCString existsQuery =
"SELECT EXISTS "
"(SELECT 1 FROM Directories INNER JOIN Entries USING (handle) "
"WHERE Directories.name = :name AND Entries.parent = :parent ) "
";"_ns;
QM_TRY_RETURN(ApplyEntryExistsQuery(mConnection, existsQuery, aHandle));
}
Result<bool, QMResult> DoesDirectoryExist(
const FileSystemConnection& mConnection, const EntryId& aEntry) {
MOZ_ASSERT(!aEntry.IsEmpty());
const nsCString existsQuery =
"SELECT EXISTS "
"(SELECT 1 FROM Directories WHERE handle = :handle ) "
";"_ns;
QM_TRY_RETURN(ApplyEntryExistsQuery(mConnection, existsQuery, aEntry));
}
Result<bool, QMResult> IsAncestor(const FileSystemConnection& aConnection,
const FileSystemEntryPair& aEndpoints) {
const nsCString pathQuery =
"WITH RECURSIVE followPath(handle, parent) AS ( "
"SELECT handle, parent "
"FROM Entries "
"WHERE handle=:entryId "
"UNION "
"SELECT Entries.handle, Entries.parent FROM followPath, Entries "
"WHERE followPath.parent=Entries.handle ) "
"SELECT EXISTS "
"(SELECT 1 FROM followPath "
"WHERE handle=:possibleAncestor ) "
";"_ns;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, pathQuery));
QM_TRY(
QM_TO_RESULT(stmt.BindEntryIdByName("entryId"_ns, aEndpoints.childId())));
QM_TRY(QM_TO_RESULT(
stmt.BindEntryIdByName("possibleAncestor"_ns, aEndpoints.parentId())));
return stmt.YesOrNoQuery();
}
Result<bool, QMResult> DoesFileExist(const FileSystemConnection& aConnection,
const FileSystemChildMetadata& aHandle) {
MOZ_ASSERT(!aHandle.parentId().IsEmpty());
const nsCString existsQuery =
"SELECT EXISTS "
"(SELECT 1 FROM Files INNER JOIN Entries USING (handle) "
"WHERE Files.name = :name AND Entries.parent = :parent ) "
";"_ns;
QM_TRY_RETURN(ApplyEntryExistsQuery(aConnection, existsQuery, aHandle));
}
nsresult GetEntries(const FileSystemConnection& aConnection,
const nsACString& aUnboundStmt, const EntryId& aParent,
PageNumber aPage, bool aDirectory,
FileSystemEntries& aEntries) {
// The entries inside a directory are sent to the child process in batches
// of pageSize items. Large value ensures that iteration is less often delayed
// by IPC messaging and querying the database.
// TODO: The current value 1024 is not optimized.
// TODO: Value "pageSize" is shared with the iterator implementation and
// should be defined in a common place.
const int32_t pageSize = 1024;
QM_TRY_UNWRAP(bool exists, DoesDirectoryExist(aConnection, aParent));
if (!exists) {
return NS_ERROR_DOM_NOT_FOUND_ERR;
}
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, aUnboundStmt));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("parent"_ns, aParent)));
QM_TRY(QM_TO_RESULT(stmt.BindPageNumberByName("pageSize"_ns, pageSize)));
QM_TRY(QM_TO_RESULT(
stmt.BindPageNumberByName("pageOffset"_ns, aPage * pageSize)));
QM_TRY_UNWRAP(bool moreResults, stmt.ExecuteStep());
while (moreResults) {
QM_TRY_UNWRAP(EntryId entryId, stmt.GetEntryIdByColumn(/* Column */ 0u));
QM_TRY_UNWRAP(Name entryName, stmt.GetNameByColumn(/* Column */ 1u));
FileSystemEntryMetadata metadata(entryId, entryName, aDirectory);
aEntries.AppendElement(metadata);
QM_TRY_UNWRAP(moreResults, stmt.ExecuteStep());
}
return NS_OK;
}
Result<EntryId, QMResult> GetUniqueEntryId(
const FileSystemConnection& aConnection,
const FileSystemChildMetadata& aHandle) {
const nsCString existsQuery =
"SELECT EXISTS "
"(SELECT 1 FROM Entries "
"WHERE handle = :handle )"
";"_ns;
FileSystemChildMetadata generatorInput = aHandle;
const size_t maxRounds = 1024u;
for (size_t hangGuard = 0u; hangGuard < maxRounds; ++hangGuard) {
QM_TRY_UNWRAP(EntryId entryId, fs::data::GetEntryHandle(generatorInput));
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, existsQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, entryId)));
QM_TRY_UNWRAP(bool alreadyInUse, stmt.YesOrNoQuery());
if (!alreadyInUse) {
return entryId;
}
generatorInput.parentId() = entryId;
}
return Err(QMResult(NS_ERROR_UNEXPECTED));
}
nsresult PerformRename(const FileSystemConnection& aConnection,
const FileSystemEntryMetadata& aHandle,
const Name& aNewName, const ContentType& aNewType,
const nsLiteralCString& aNameUpdateQuery) {
MOZ_ASSERT(!aHandle.entryId().IsEmpty());
MOZ_ASSERT(IsValidName(aHandle.entryName()));
// same-name is checked in RenameEntry()
if (!IsValidName(aNewName)) {
return NS_ERROR_DOM_TYPE_MISMATCH_ERR;
}
// TODO: This should fail when handle doesn't exist - the
// explicit file or directory existence queries are redundant
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, aNameUpdateQuery)
.mapErr(toNSResult));
if (!aNewType.IsVoid()) {
QM_TRY(MOZ_TO_RESULT(stmt.BindContentTypeByName("type"_ns, aNewType)));
}
QM_TRY(MOZ_TO_RESULT(stmt.BindNameByName("name"_ns, aNewName)));
QM_TRY(MOZ_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, aHandle.entryId())));
QM_TRY(MOZ_TO_RESULT(stmt.Execute()));
return NS_OK;
}
nsresult PerformRenameDirectory(const FileSystemConnection& aConnection,
const FileSystemEntryMetadata& aHandle,
const Name& aNewName) {
const nsLiteralCString updateDirectoryNameQuery =
"UPDATE Directories "
"SET name = :name "
"WHERE handle = :handle "
";"_ns;
return PerformRename(aConnection, aHandle, aNewName, VoidCString(),
updateDirectoryNameQuery);
}
nsresult PerformRenameFile(const FileSystemConnection& aConnection,
const FileSystemEntryMetadata& aHandle,
const Name& aNewName, const ContentType& aNewType) {
const nsLiteralCString updateFileTypeAndNameQuery =
"UPDATE Files SET type = :type, name = :name "
"WHERE handle = :handle ;"_ns;
const nsLiteralCString updateFileNameQuery =
"UPDATE Files SET name = :name WHERE handle = :handle ;"_ns;
if (aNewType.IsVoid()) {
return PerformRename(aConnection, aHandle, aNewName, aNewType,
updateFileNameQuery);
}
return PerformRename(aConnection, aHandle, aNewName, aNewType,
updateFileTypeAndNameQuery);
}
template <class HandlerType>
nsresult SetUsageTrackingImpl(const FileSystemConnection& aConnection,
const FileId& aFileId, bool aTracked,
HandlerType&& aOnMissingFile) {
const nsLiteralCString setTrackedQuery =
"INSERT INTO Usages "
"( handle, tracked ) "
"VALUES "
"( :handle, :tracked ) "
"ON CONFLICT(handle) DO "
"UPDATE SET tracked = excluded.tracked "
";"_ns;
const nsresult customReturnValue =
aTracked ? NS_ERROR_DOM_NOT_FOUND_ERR : NS_OK;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, setTrackedQuery));
QM_TRY(MOZ_TO_RESULT(stmt.BindFileIdByName("handle"_ns, aFileId)));
QM_TRY(MOZ_TO_RESULT(stmt.BindBooleanByName("tracked"_ns, aTracked)));
QM_TRY(MOZ_TO_RESULT(stmt.Execute()), customReturnValue,
std::forward<HandlerType>(aOnMissingFile));
return NS_OK;
}
Result<nsTArray<FileId>, QMResult> GetTrackedFiles(
const FileSystemConnection& aConnection) {
// The same query works for both 001 and 002 schemas because handle is
// an entry id and later on a file id, respectively.
static const nsLiteralCString getTrackedFilesQuery =
"SELECT handle FROM Usages WHERE tracked = TRUE;"_ns;
nsTArray<FileId> trackedFiles;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, getTrackedFilesQuery));
QM_TRY_UNWRAP(bool moreResults, stmt.ExecuteStep());
while (moreResults) {
QM_TRY_UNWRAP(FileId fileId, stmt.GetFileIdByColumn(/* Column */ 0u));
trackedFiles.AppendElement(fileId); // TODO: fallible?
QM_TRY_UNWRAP(moreResults, stmt.ExecuteStep());
}
return trackedFiles;
}
/** This handles the file not found error by assigning 0 usage to the dangling
* handle and puts the handle to a non-tracked state. Otherwise, when the
* file or database cannot be reached, the file remains in the tracked state.
*/
template <class QuotaCacheUpdate>
nsresult UpdateUsageForFileEntry(const FileSystemConnection& aConnection,
const FileSystemFileManager& aFileManager,
const FileId& aFileId,
const nsLiteralCString& aUpdateQuery,
QuotaCacheUpdate&& aUpdateCache) {
QM_TRY_INSPECT(const auto& fileHandle, aFileManager.GetFile(aFileId));
// A file could have changed in a way which doesn't allow to read its size.
QM_TRY_UNWRAP(
const Usage fileSize,
QM_OR_ELSE_WARN_IF(
// Expression.
MOZ_TO_RESULT_INVOKE_MEMBER(fileHandle, GetFileSize),
// Predicate.
([](const nsresult rv) { return rv == NS_ERROR_FILE_NOT_FOUND; }),
// Fallback. If the file does no longer exist, treat it as 0-sized.
ErrToDefaultOk<Usage>));
QM_TRY(MOZ_TO_RESULT(aUpdateCache(fileSize)));
// No transaction as one statement succeeds or fails atomically
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, aUpdateQuery));
QM_TRY(MOZ_TO_RESULT(stmt.BindFileIdByName("handle"_ns, aFileId)));
QM_TRY(MOZ_TO_RESULT(stmt.BindUsageByName("usage"_ns, fileSize)));
QM_TRY(MOZ_TO_RESULT(stmt.Execute()));
return NS_OK;
}
nsresult UpdateUsageUnsetTracked(const FileSystemConnection& aConnection,
const FileSystemFileManager& aFileManager,
const FileId& aFileId) {
static const nsLiteralCString updateUsagesUnsetTrackedQuery =
"UPDATE Usages SET usage = :usage, tracked = FALSE "
"WHERE handle = :handle;"_ns;
auto noCacheUpdateNeeded = [](auto) { return NS_OK; };
return UpdateUsageForFileEntry(aConnection, aFileManager, aFileId,
updateUsagesUnsetTrackedQuery,
std::move(noCacheUpdateNeeded));
}
/**
* @brief Get the recorded usage only if the file is in tracked state.
* During origin initialization, if the usage on disk is unreadable, the latest
* recorded usage is reported to the quota manager for the tracked files.
* To allow writing, we attempt to update the real usage with one database and
* one file size query.
*/
Result<Maybe<Usage>, QMResult> GetMaybeTrackedUsage(
const FileSystemConnection& aConnection, const FileId& aFileId) {
const nsLiteralCString trackedUsageQuery =
"SELECT usage FROM Usages WHERE tracked = TRUE AND handle = :handle "
");"_ns;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, trackedUsageQuery));
QM_TRY(QM_TO_RESULT(stmt.BindFileIdByName("handle"_ns, aFileId)));
QM_TRY_UNWRAP(const bool moreResults, stmt.ExecuteStep());
if (!moreResults) {
return Maybe<Usage>(Nothing());
}
QM_TRY_UNWRAP(Usage trackedUsage, stmt.GetUsageByColumn(/* Column */ 0u));
return Some(trackedUsage);
}
Result<bool, nsresult> ScanTrackedFiles(
const FileSystemConnection& aConnection,
const FileSystemFileManager& aFileManager) {
QM_TRY_INSPECT(const nsTArray<FileId>& trackedFiles,
GetTrackedFiles(aConnection).mapErr(toNSResult));
bool ok = true;
for (const auto& fileId : trackedFiles) {
// On success, tracked is set to false, otherwise its value is kept (= true)
QM_WARNONLY_TRY(MOZ_TO_RESULT(UpdateUsageUnsetTracked(
aConnection, aFileManager, fileId)),
[&ok](const auto& /*aRv*/) { ok = false; });
}
return ok;
}
Result<Ok, QMResult> DeleteEntry(const FileSystemConnection& aConnection,
const EntryId& aEntryId) {
// If it's a directory, deleting the handle will cascade
const nsLiteralCString deleteEntryQuery =
"DELETE FROM Entries "
"WHERE handle = :handle "
";"_ns;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, deleteEntryQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, aEntryId)));
QM_TRY(QM_TO_RESULT(stmt.Execute()));
return Ok{};
}
Result<int32_t, QMResult> GetTrackedFilesCount(
const FileSystemConnection& aConnection) {
// TODO: We could query the count directly
QM_TRY_INSPECT(const auto& trackedFiles, GetTrackedFiles(aConnection));
CheckedInt32 checkedFileCount = trackedFiles.Length();
QM_TRY(OkIf(checkedFileCount.isValid()),
Err(QMResult(NS_ERROR_ILLEGAL_VALUE)));
return checkedFileCount.value();
}
void LogWithFilename(const FileSystemFileManager& aFileManager,
const char* aFormat, const FileId& aFileId) {
if (!LOG_ENABLED()) {
return;
}
QM_TRY_INSPECT(const auto& localFile, aFileManager.GetFile(aFileId), QM_VOID);
nsAutoString localPath;
QM_TRY(MOZ_TO_RESULT(localFile->GetPath(localPath)), QM_VOID);
LOG((aFormat, NS_ConvertUTF16toUTF8(localPath).get()));
}
Result<bool, QMResult> IsAnyDescendantLocked(
const FileSystemConnection& aConnection,
const FileSystemDataManager& aDataManager, const EntryId& aEntryId) {
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, gDescendantsQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, aEntryId)));
QM_TRY_UNWRAP(bool moreResults, stmt.ExecuteStep());
while (moreResults) {
// Works only for version 001
QM_TRY_INSPECT(const EntryId& entryId,
stmt.GetEntryIdByColumn(/* Column */ 0u));
QM_TRY_UNWRAP(const bool isLocked, aDataManager.IsLocked(entryId), true);
if (isLocked) {
return true;
}
QM_TRY_UNWRAP(moreResults, stmt.ExecuteStep());
}
return false;
}
} // namespace
FileSystemDatabaseManagerVersion001::FileSystemDatabaseManagerVersion001(
FileSystemDataManager* aDataManager, FileSystemConnection&& aConnection,
UniquePtr<FileSystemFileManager>&& aFileManager, const EntryId& aRootEntry)
: mDataManager(aDataManager),
mConnection(aConnection),
mFileManager(std::move(aFileManager)),
mRootEntry(aRootEntry),
mClientMetadata(aDataManager->OriginMetadataRef(),
quota::Client::FILESYSTEM),
mFilesOfUnknownUsage(-1) {}
/* static */
nsresult FileSystemDatabaseManagerVersion001::RescanTrackedUsages(
const FileSystemConnection& aConnection,
const quota::OriginMetadata& aOriginMetadata) {
QM_TRY_UNWRAP(UniquePtr<FileSystemFileManager> fileManager,
data::FileSystemFileManager::CreateFileSystemFileManager(
aOriginMetadata));
QM_TRY_UNWRAP(bool ok, ScanTrackedFiles(aConnection, *fileManager));
if (ok) {
return NS_OK;
}
// Retry once without explicit delay
QM_TRY_UNWRAP(ok, ScanTrackedFiles(aConnection, *fileManager));
if (!ok) {
return NS_ERROR_UNEXPECTED;
}
return NS_OK;
}
/* static */
Result<Usage, QMResult> FileSystemDatabaseManagerVersion001::GetFileUsage(
const FileSystemConnection& aConnection) {
const nsLiteralCString sumUsagesQuery = "SELECT sum(usage) FROM Usages;"_ns;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, sumUsagesQuery));
QM_TRY_UNWRAP(const bool moreResults, stmt.ExecuteStep());
if (!moreResults) {
return Err(QMResult(NS_ERROR_DOM_FILE_NOT_READABLE_ERR));
}
QM_TRY_UNWRAP(Usage totalFiles, stmt.GetUsageByColumn(/* Column */ 0u));
return totalFiles;
}
Result<quota::UsageInfo, QMResult>
FileSystemDatabaseManagerVersion001::GetUsage() const {
return FileSystemDatabaseManager::GetUsage(mConnection, mClientMetadata);
}
nsresult FileSystemDatabaseManagerVersion001::UpdateUsage(
const FileId& aFileId) {
// We don't track directories or non-existent files.
QM_TRY_UNWRAP(bool fileExists, DoesFileIdExist(aFileId).mapErr(toNSResult));
if (!fileExists) {
return NS_OK; // May be deleted before update, no assert
}
QM_TRY_UNWRAP(nsCOMPtr<nsIFile> file, mFileManager->GetFile(aFileId));
MOZ_ASSERT(file);
Usage fileSize = 0;
bool exists = false;
QM_TRY(MOZ_TO_RESULT(file->Exists(&exists)));
if (exists) {
QM_TRY(MOZ_TO_RESULT(file->GetFileSize(&fileSize)));
}
QM_TRY(MOZ_TO_RESULT(UpdateUsageInDatabase(aFileId, fileSize)));
return NS_OK;
}
Result<EntryId, QMResult>
FileSystemDatabaseManagerVersion001::GetOrCreateDirectory(
const FileSystemChildMetadata& aHandle, bool aCreate) {
MOZ_ASSERT(!aHandle.parentId().IsEmpty());
const auto& name = aHandle.childName();
// Belt and suspenders: check here as well as in child.
if (!IsValidName(name)) {
return Err(QMResult(NS_ERROR_DOM_TYPE_MISMATCH_ERR));
}
MOZ_ASSERT(!(name.IsVoid() || name.IsEmpty()));
bool exists = true;
QM_TRY_UNWRAP(exists, DoesFileExist(mConnection, aHandle));
// By spec, we don't allow a file and a directory
// to have the same name and parent
if (exists) {
return Err(QMResult(NS_ERROR_DOM_TYPE_MISMATCH_ERR));
}
QM_TRY_UNWRAP(exists, DoesDirectoryExist(mConnection, aHandle));
// exists as directory
if (exists) {
return FindEntryId(mConnection, aHandle, false);
}
if (!aCreate) {
return Err(QMResult(NS_ERROR_DOM_NOT_FOUND_ERR));
}
const nsLiteralCString insertEntryQuery =
"INSERT OR IGNORE INTO Entries "
"( handle, parent ) "
"VALUES "
"( :handle, :parent ) "
";"_ns;
const nsLiteralCString insertDirectoryQuery =
"INSERT OR IGNORE INTO Directories "
"( handle, name ) "
"VALUES "
"( :handle, :name ) "
";"_ns;
QM_TRY_INSPECT(const EntryId& entryId, GetEntryId(aHandle));
MOZ_ASSERT(!entryId.IsEmpty());
QM_TRY_UNWRAP(auto transaction, StartedTransaction::Create(mConnection));
{
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(mConnection, insertEntryQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, entryId)));
QM_TRY(
QM_TO_RESULT(stmt.BindEntryIdByName("parent"_ns, aHandle.parentId())));
QM_TRY(QM_TO_RESULT(stmt.Execute()));
}
{
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(mConnection, insertDirectoryQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, entryId)));
QM_TRY(QM_TO_RESULT(stmt.BindNameByName("name"_ns, name)));
QM_TRY(QM_TO_RESULT(stmt.Execute()));
}
QM_TRY(QM_TO_RESULT(transaction.Commit()));
QM_TRY_UNWRAP(DebugOnly<bool> doesItExistNow,
DoesDirectoryExist(mConnection, aHandle));
MOZ_ASSERT(doesItExistNow);
return entryId;
}
Result<EntryId, QMResult> FileSystemDatabaseManagerVersion001::GetOrCreateFile(
const FileSystemChildMetadata& aHandle, bool aCreate) {
MOZ_ASSERT(!aHandle.parentId().IsEmpty());
const auto& name = aHandle.childName();
// Belt and suspenders: check here as well as in child.
if (!IsValidName(name)) {
return Err(QMResult(NS_ERROR_DOM_TYPE_MISMATCH_ERR));
}
MOZ_ASSERT(!(name.IsVoid() || name.IsEmpty()));
QM_TRY_UNWRAP(bool exists, DoesDirectoryExist(mConnection, aHandle));
// By spec, we don't allow a file and a directory
// to have the same name and parent
QM_TRY(OkIf(!exists), Err(QMResult(NS_ERROR_DOM_TYPE_MISMATCH_ERR)));
QM_TRY_UNWRAP(exists, DoesFileExist(mConnection, aHandle));
if (exists) {
QM_TRY_RETURN(FindEntryId(mConnection, aHandle, /* aIsFile */ true));
}
if (!aCreate) {
return Err(QMResult(NS_ERROR_DOM_NOT_FOUND_ERR));
}
const nsLiteralCString insertEntryQuery =
"INSERT INTO Entries "
"( handle, parent ) "
"VALUES "
"( :handle, :parent ) "
";"_ns;
const nsLiteralCString insertFileQuery =
"INSERT INTO Files "
"( handle, type, name ) "
"VALUES "
"( :handle, :type, :name ) "
";"_ns;
QM_TRY_INSPECT(const EntryId& entryId, GetEntryId(aHandle));
MOZ_ASSERT(!entryId.IsEmpty());
const ContentType type = DetermineContentType(name);
QM_TRY_UNWRAP(auto transaction, StartedTransaction::Create(mConnection));
{
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(mConnection, insertEntryQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, entryId)));
QM_TRY(
QM_TO_RESULT(stmt.BindEntryIdByName("parent"_ns, aHandle.parentId())));
QM_TRY(QM_TO_RESULT(stmt.Execute()), QM_PROPAGATE,
([this, &aHandle](const auto& aRv) {
QM_TRY_UNWRAP(bool parentExists,
DoesDirectoryExist(mConnection, aHandle.parentId()),
QM_VOID);
QM_TRY(OkIf(parentExists), QM_VOID);
}));
}
{
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(mConnection, insertFileQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, entryId)));
QM_TRY(QM_TO_RESULT(stmt.BindContentTypeByName("type"_ns, type)));
QM_TRY(QM_TO_RESULT(stmt.BindNameByName("name"_ns, name)));
QM_TRY(QM_TO_RESULT(stmt.Execute()));
}
QM_TRY(QM_TO_RESULT(transaction.Commit()));
return entryId;
}
nsresult FileSystemDatabaseManagerVersion001::GetFile(
const EntryId& aEntryId, const FileId& aFileId, const FileMode& aMode,
ContentType& aType, TimeStamp& lastModifiedMilliSeconds,
nsTArray<Name>& aPath, nsCOMPtr<nsIFile>& aFile) const {
MOZ_ASSERT(!aFileId.IsEmpty());
MOZ_ASSERT(aMode == FileMode::EXCLUSIVE);
const FileSystemEntryPair endPoints(mRootEntry, aEntryId);
QM_TRY_UNWRAP(aPath, ResolveReversedPath(mConnection, endPoints));
if (aPath.IsEmpty()) {
return NS_ERROR_DOM_NOT_FOUND_ERR;
}
QM_TRY(MOZ_TO_RESULT(GetFileAttributes(mConnection, aEntryId, aType)));
QM_TRY_UNWRAP(aFile, mFileManager->GetOrCreateFile(aFileId));
PRTime lastModTime = 0;
QM_TRY(MOZ_TO_RESULT(aFile->GetLastModifiedTime(&lastModTime)));
lastModifiedMilliSeconds = static_cast<TimeStamp>(lastModTime);
aPath.Reverse();
return NS_OK;
}
Result<FileSystemDirectoryListing, QMResult>
FileSystemDatabaseManagerVersion001::GetDirectoryEntries(
const EntryId& aParent, PageNumber aPage) const {
const nsCString directoriesQuery =
"SELECT Dirs.handle, Dirs.name "
"FROM Directories AS Dirs "
"INNER JOIN ( "
"SELECT handle "
"FROM Entries "
"WHERE parent = :parent "
"LIMIT :pageSize "
"OFFSET :pageOffset ) "
"AS Ents "
"ON Dirs.handle = Ents.handle "
";"_ns;
const nsCString filesQuery =
"SELECT Files.handle, Files.name "
"FROM Files "
"INNER JOIN ( "
"SELECT handle "
"FROM Entries "
"WHERE parent = :parent "
"LIMIT :pageSize "
"OFFSET :pageOffset ) "
"AS Ents "
"ON Files.handle = Ents.handle "
";"_ns;
FileSystemDirectoryListing entries;
QM_TRY(
QM_TO_RESULT(GetEntries(mConnection, directoriesQuery, aParent, aPage,
/* aDirectory */ true, entries.directories())));
QM_TRY(QM_TO_RESULT(GetEntries(mConnection, filesQuery, aParent, aPage,
/* aDirectory */ false, entries.files())));
return entries;
}
Result<bool, QMResult> FileSystemDatabaseManagerVersion001::RemoveDirectory(
const FileSystemChildMetadata& aHandle, bool aRecursive) {
MOZ_ASSERT(!aHandle.parentId().IsEmpty());
if (aHandle.childName().IsEmpty()) {
return false;
}
DebugOnly<Name> name = aHandle.childName();
MOZ_ASSERT(!name.inspect().IsVoid());
QM_TRY_UNWRAP(bool exists, DoesDirectoryExist(mConnection, aHandle));
if (!exists) {
return false;
}
// At this point, entry exists and is a directory.
QM_TRY_UNWRAP(EntryId entryId, FindEntryId(mConnection, aHandle, false));
MOZ_ASSERT(!entryId.IsEmpty());
QM_TRY_UNWRAP(bool isEmpty, IsDirectoryEmpty(mConnection, entryId));
MOZ_ASSERT(mDataManager);
QM_TRY_UNWRAP(const bool isLocked,
IsAnyDescendantLocked(mConnection, *mDataManager, entryId));
QM_TRY(OkIf(!isLocked),
Err(QMResult(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR)));
if (!aRecursive && !isEmpty) {
return Err(QMResult(NS_ERROR_DOM_INVALID_MODIFICATION_ERR));
}
QM_TRY_UNWRAP(Usage usage, GetUsagesOfDescendants(entryId));
QM_TRY_INSPECT(const nsTArray<FileId>& descendants,
FindFilesUnderEntry(entryId));
nsTArray<FileId> failedRemovals;
QM_TRY_UNWRAP(DebugOnly<Usage> removedUsage,
mFileManager->RemoveFiles(descendants, failedRemovals));
// Usage is for the current main file but we remove temporary files too.
MOZ_ASSERT_IF(failedRemovals.IsEmpty() && (0 == mFilesOfUnknownUsage),
usage <= removedUsage);
TryRemoveDuringIdleMaintenance(failedRemovals);
auto isInFailedRemovals = [&failedRemovals](const auto& aFileId) {
return failedRemovals.cend() !=
std::find_if(failedRemovals.cbegin(), failedRemovals.cend(),
[&aFileId](const auto& aFailedRemoval) {
return aFileId == aFailedRemoval;
});
};
for (const auto& fileId : descendants) {
if (!isInFailedRemovals(fileId)) {
QM_WARNONLY_TRY(QM_TO_RESULT(RemoveFileId(fileId)));
}
}
if (usage > 0) { // Performance!
DecreaseCachedQuotaUsage(usage);
}
QM_TRY(DeleteEntry(mConnection, entryId));
return true;
}
Result<bool, QMResult> FileSystemDatabaseManagerVersion001::RemoveFile(
const FileSystemChildMetadata& aHandle) {
MOZ_ASSERT(!aHandle.parentId().IsEmpty());
if (aHandle.childName().IsEmpty()) {
return false;
}
DebugOnly<Name> name = aHandle.childName();
MOZ_ASSERT(!name.inspect().IsVoid());
// Make it more evident that we won't remove directories
QM_TRY_UNWRAP(bool exists, DoesFileExist(mConnection, aHandle));
if (!exists) {
return false;
}
// At this point, entry exists and is a file
QM_TRY_UNWRAP(EntryId entryId, FindEntryId(mConnection, aHandle, true));
MOZ_ASSERT(!entryId.IsEmpty());
// XXX This code assumes the spec question is resolved to state
// removing an in-use file should fail. If it shouldn't fail, we need to
// do something to neuter all the extant FileAccessHandles/WritableFileStreams
// that reference it
QM_TRY_UNWRAP(const bool isLocked, mDataManager->IsLocked(entryId));
if (isLocked) {
LOG(("Trying to remove in-use file"));
return Err(QMResult(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR));
}
QM_TRY_INSPECT(const nsTArray<FileId>& diskItems,
FindFilesUnderEntry(entryId));
QM_TRY_UNWRAP(Usage usage, GetUsagesOfDescendants(entryId));
nsTArray<FileId> failedRemovals;
QM_TRY_UNWRAP(DebugOnly<Usage> removedUsage,
mFileManager->RemoveFiles(diskItems, failedRemovals));
// We only check the most common case. This can fail spuriously if an external
// application writes to the file, or OS reports zero size due to corruption.
MOZ_ASSERT_IF(failedRemovals.IsEmpty() && (0 == mFilesOfUnknownUsage),
usage == removedUsage);
TryRemoveDuringIdleMaintenance(failedRemovals);
auto isInFailedRemovals = [&failedRemovals](const auto& aFileId) {
return failedRemovals.cend() !=
std::find_if(failedRemovals.cbegin(), failedRemovals.cend(),
[&aFileId](const auto& aFailedRemoval) {
return aFileId == aFailedRemoval;
});
};
for (const auto& fileId : diskItems) {
if (!isInFailedRemovals(fileId)) {
QM_WARNONLY_TRY(QM_TO_RESULT(RemoveFileId(fileId)));
}
}
if (usage > 0) { // Performance!
DecreaseCachedQuotaUsage(usage);
}
QM_TRY(DeleteEntry(mConnection, entryId));
return true;
}
Result<EntryId, QMResult> FileSystemDatabaseManagerVersion001::RenameEntry(
const FileSystemEntryMetadata& aHandle, const Name& aNewName) {
const auto& entryId = aHandle.entryId();
// Can't rename root
if (mRootEntry == entryId) {
return Err(QMResult(NS_ERROR_DOM_NOT_FOUND_ERR));
}
// Verify the source exists
QM_TRY_UNWRAP(bool isFile, IsFile(mConnection, entryId),
Err(QMResult(NS_ERROR_DOM_NOT_FOUND_ERR)));
// Are we actually renaming?
if (aHandle.entryName() == aNewName) {
return entryId;
}
QM_TRY(QM_TO_RESULT(PrepareRenameEntry(mConnection, mDataManager, aHandle,
aNewName, isFile)));
QM_TRY_UNWRAP(auto transaction, StartedTransaction::Create(mConnection));
if (isFile) {
const ContentType type = DetermineContentType(aNewName);
QM_TRY(
QM_TO_RESULT(PerformRenameFile(mConnection, aHandle, aNewName, type)));
} else {
QM_TRY(
QM_TO_RESULT(PerformRenameDirectory(mConnection, aHandle, aNewName)));
}
QM_TRY(QM_TO_RESULT(transaction.Commit()));
return entryId;
}
Result<EntryId, QMResult> FileSystemDatabaseManagerVersion001::MoveEntry(
const FileSystemEntryMetadata& aHandle,
const FileSystemChildMetadata& aNewDesignation) {
const auto& entryId = aHandle.entryId();
MOZ_ASSERT(!entryId.IsEmpty());
if (mRootEntry == entryId) {
return Err(QMResult(NS_ERROR_DOM_NOT_FOUND_ERR));
}
// Verify the source exists
QM_TRY_UNWRAP(bool isFile, IsFile(mConnection, entryId),
Err(QMResult(NS_ERROR_DOM_NOT_FOUND_ERR)));
// If the rename doesn't change the name or directory, just return success.
// XXX Needs to be added to the spec
QM_WARNONLY_TRY_UNWRAP(Maybe<bool> maybeSame,
IsSame(mConnection, aHandle, aNewDesignation, isFile));
if (maybeSame && maybeSame.value()) {
return entryId;
}
QM_TRY(QM_TO_RESULT(PrepareMoveEntry(mConnection, mDataManager, aHandle,
aNewDesignation, isFile)));
const nsLiteralCString updateEntryParentQuery =
"UPDATE Entries "
"SET parent = :parent "
"WHERE handle = :handle "
";"_ns;
QM_TRY_UNWRAP(auto transaction, StartedTransaction::Create(mConnection));
{
// We always change the parent because it's simpler than checking if the
// parent needs to be changed
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(mConnection, updateEntryParentQuery));
QM_TRY(QM_TO_RESULT(
stmt.BindEntryIdByName("parent"_ns, aNewDesignation.parentId())));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, entryId)));
QM_TRY(QM_TO_RESULT(stmt.Execute()));
}
const Name& newName = aNewDesignation.childName();
// Are we actually renaming?
if (aHandle.entryName() == newName) {
QM_TRY(QM_TO_RESULT(transaction.Commit()));
return entryId;
}
if (isFile) {
const ContentType type = DetermineContentType(newName);
QM_TRY(
QM_TO_RESULT(PerformRenameFile(mConnection, aHandle, newName, type)));
} else {
QM_TRY(QM_TO_RESULT(PerformRenameDirectory(mConnection, aHandle, newName)));
}
QM_TRY(QM_TO_RESULT(transaction.Commit()));
return entryId;
}
Result<Path, QMResult> FileSystemDatabaseManagerVersion001::Resolve(
const FileSystemEntryPair& aEndpoints) const {
QM_TRY_UNWRAP(Path path, ResolveReversedPath(mConnection, aEndpoints));
// Note: if not an ancestor, returns null
path.Reverse();
return path;
}
Result<EntryId, QMResult> FileSystemDatabaseManagerVersion001::GetEntryId(
const FileSystemChildMetadata& aHandle) const {
return GetUniqueEntryId(mConnection, aHandle);
}
Result<EntryId, QMResult> FileSystemDatabaseManagerVersion001::GetEntryId(
const FileId& aFileId) const {
return aFileId.Value();
}
Result<FileId, QMResult> FileSystemDatabaseManagerVersion001::EnsureFileId(
const EntryId& aEntryId) {
return FileId(aEntryId);
}
Result<FileId, QMResult>
FileSystemDatabaseManagerVersion001::EnsureTemporaryFileId(
const EntryId& aEntryId) {
return FileId(aEntryId);
}
Result<FileId, QMResult> FileSystemDatabaseManagerVersion001::GetFileId(
const EntryId& aEntryId) const {
return FileId(aEntryId);
}
nsresult FileSystemDatabaseManagerVersion001::MergeFileId(
const EntryId& /* aEntryId */, const FileId& /* aFileId */,
bool /* aAbort */) {
// Version 001 should always use exclusive mode and not get here.
return NS_ERROR_NOT_IMPLEMENTED;
}
void FileSystemDatabaseManagerVersion001::Close() { mConnection->Close(); }
nsresult FileSystemDatabaseManagerVersion001::BeginUsageTracking(
const FileId& aFileId) {
MOZ_ASSERT(!aFileId.IsEmpty());
// If file is already tracked but we cannot read its size, error.
// If file does not exist, this will succeed because usage is zero.
QM_TRY(EnsureUsageIsKnown(aFileId));
// If file does not exist, set usage tracking to true fails with
// file not found error.
QM_TRY(MOZ_TO_RESULT(SetUsageTracking(aFileId, true)));
return NS_OK;
}
nsresult FileSystemDatabaseManagerVersion001::EndUsageTracking(
const FileId& aFileId) {
// This is expected to fail only if database is unreachable.
QM_TRY(MOZ_TO_RESULT(SetUsageTracking(aFileId, false)));
return NS_OK;
}
Result<bool, QMResult> FileSystemDatabaseManagerVersion001::DoesFileIdExist(
const FileId& aFileId) const {
MOZ_ASSERT(!aFileId.IsEmpty());
QM_TRY_RETURN(DoesFileExist(mConnection, aFileId.Value()));
}
nsresult FileSystemDatabaseManagerVersion001::RemoveFileId(
const FileId& /* aFileId */) {
return NS_OK;
}
/**
* @brief Get the sum of usages for all file descendants of a directory entry.
* We obtain the value with one query, which is presumably better than having a
* separate query for each individual descendant.
* TODO: Check if this is true
*
* Please see GetFileUsage documentation for why we use the latest recorded
* value from the database instead of the file size property from the disk.
*/
Result<Usage, QMResult>
FileSystemDatabaseManagerVersion001::GetUsagesOfDescendants(
const EntryId& aEntryId) const {
const nsLiteralCString descendantUsagesQuery =
"WITH RECURSIVE traceChildren(handle, parent) AS ( "
"SELECT handle, parent "
"FROM Entries "
"WHERE handle=:handle "
"UNION "
"SELECT Entries.handle, Entries.parent FROM traceChildren, Entries "
"WHERE traceChildren.handle=Entries.parent ) "
"SELECT sum(Usages.usage) "
"FROM traceChildren INNER JOIN Usages "
"USING(handle) "
";"_ns;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(mConnection, descendantUsagesQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, aEntryId)));
QM_TRY_UNWRAP(const bool moreResults, stmt.ExecuteStep());
if (!moreResults) {
return 0;
}
QM_TRY_RETURN(stmt.GetUsageByColumn(/* Column */ 0u));
}
Result<nsTArray<FileId>, QMResult>
FileSystemDatabaseManagerVersion001::FindFilesUnderEntry(
const EntryId& aEntryId) const {
nsTArray<FileId> descendants;
{
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(mConnection, gDescendantsQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, aEntryId)));
QM_TRY_UNWRAP(bool moreResults, stmt.ExecuteStep());
while (moreResults) {
// Works only for version 001
QM_TRY_INSPECT(const FileId& fileId,
stmt.GetFileIdByColumn(/* Column */ 0u));
descendants.AppendElement(fileId);
QM_TRY_UNWRAP(moreResults, stmt.ExecuteStep());
}
}
return descendants;
}
nsresult FileSystemDatabaseManagerVersion001::SetUsageTracking(
const FileId& aFileId, bool aTracked) {
auto onMissingFile = [this, &aFileId](const auto& aRv) {
// Usages constrains entryId to be present in Files
MOZ_ASSERT(NS_ERROR_STORAGE_CONSTRAINT == ToNSResult(aRv));
// The query *should* fail if and only if file does not exist
QM_TRY_UNWRAP(DebugOnly<bool> fileExists, DoesFileIdExist(aFileId),
QM_VOID);
MOZ_ASSERT(!fileExists);
};
return SetUsageTrackingImpl(mConnection, aFileId, aTracked, onMissingFile);
}
nsresult FileSystemDatabaseManagerVersion001::UpdateUsageInDatabase(
const FileId& aFileId, Usage aNewDiskUsage) {
const nsLiteralCString updateUsageQuery =
"INSERT INTO Usages "
"( handle, usage ) "
"VALUES "
"( :handle, :usage ) "
"ON CONFLICT(handle) DO "
"UPDATE SET usage = excluded.usage "
";"_ns;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(mConnection, updateUsageQuery));
QM_TRY(MOZ_TO_RESULT(stmt.BindUsageByName("usage"_ns, aNewDiskUsage)));
QM_TRY(MOZ_TO_RESULT(stmt.BindFileIdByName("handle"_ns, aFileId)));
QM_TRY(MOZ_TO_RESULT(stmt.Execute()));
return NS_OK;
}
Result<Ok, QMResult> FileSystemDatabaseManagerVersion001::EnsureUsageIsKnown(
const FileId& aFileId) {
if (mFilesOfUnknownUsage < 0) { // Lazy initialization
QM_TRY_UNWRAP(mFilesOfUnknownUsage, GetTrackedFilesCount(mConnection));
}
if (mFilesOfUnknownUsage == 0) {
return Ok{};
}
QM_TRY_UNWRAP(Maybe<Usage> oldUsage,
GetMaybeTrackedUsage(mConnection, aFileId));
if (oldUsage.isNothing()) {
return Ok{}; // Usage is 0 or it was successfully recorded at unlocking.
}
auto quotaCacheUpdate = [this, &aFileId,
oldSize = oldUsage.value()](Usage aNewSize) {
return UpdateCachedQuotaUsage(aFileId, oldSize, aNewSize);
};
static const nsLiteralCString updateUsagesKeepTrackedQuery =
"UPDATE Usages SET usage = :usage WHERE handle = :handle;"_ns;
// If usage update fails, we log an error and keep things the way they were.
QM_TRY(QM_TO_RESULT(UpdateUsageForFileEntry(
mConnection, *mFileManager, aFileId, updateUsagesKeepTrackedQuery,
std::move(quotaCacheUpdate))),
Err(QMResult(NS_ERROR_DOM_FILE_NOT_READABLE_ERR)),
([this, &aFileId](const auto& /*aRv*/) {
LogWithFilename(*mFileManager, "Could not read the size of file %s",
aFileId);
}));
// We read and updated the quota usage successfully.
--mFilesOfUnknownUsage;
MOZ_ASSERT(mFilesOfUnknownUsage >= 0);
return Ok{};
}
void FileSystemDatabaseManagerVersion001::DecreaseCachedQuotaUsage(
int64_t aDelta) {
quota::QuotaManager* quotaManager = quota::QuotaManager::Get();
MOZ_ASSERT(quotaManager);
quotaManager->DecreaseUsageForClient(mClientMetadata, aDelta);
}
nsresult FileSystemDatabaseManagerVersion001::UpdateCachedQuotaUsage(
const FileId& aFileId, Usage aOldUsage, Usage aNewUsage) const {
quota::QuotaManager* quotaManager = quota::QuotaManager::Get();
MOZ_ASSERT(quotaManager);
QM_TRY_UNWRAP(nsCOMPtr<nsIFile> fileObj,
mFileManager->GetFile(aFileId).mapErr(toNSResult));
RefPtr<quota::QuotaObject> quotaObject = quotaManager->GetQuotaObject(
quota::PERSISTENCE_TYPE_DEFAULT, mClientMetadata,
quota::Client::FILESYSTEM, fileObj, aOldUsage);
MOZ_ASSERT(quotaObject);
QM_TRY(OkIf(quotaObject->MaybeUpdateSize(aNewUsage, /* aTruncate */ true)),
NS_ERROR_FILE_NO_DEVICE_SPACE);
return NS_OK;
}
nsresult FileSystemDatabaseManagerVersion001::ClearDestinationIfNotLocked(
const FileSystemConnection& aConnection,
const FileSystemDataManager* const aDataManager,
const FileSystemEntryMetadata& aHandle,
const FileSystemChildMetadata& aNewDesignation) {
// If the destination file exists, fail explicitly. Spec author plans to
// revise the spec
QM_TRY_UNWRAP(bool exists, DoesFileExist(aConnection, aNewDesignation));
if (exists) {
QM_TRY_INSPECT(const EntryId& destId,
FindEntryId(aConnection, aNewDesignation, true));
QM_TRY_UNWRAP(const bool isLocked, aDataManager->IsLocked(destId));
if (isLocked) {
LOG(("Trying to overwrite in-use file"));
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
QM_TRY_UNWRAP(DebugOnly<bool> isRemoved, RemoveFile(aNewDesignation));
MOZ_ASSERT(isRemoved);
} else {
QM_TRY_UNWRAP(exists, DoesDirectoryExist(aConnection, aNewDesignation));
if (exists) {
// Fails if directory contains locked files, otherwise total wipeout
QM_TRY_UNWRAP(DebugOnly<bool> isRemoved,
MOZ_TO_RESULT(RemoveDirectory(aNewDesignation,
/* recursive */ true)));
MOZ_ASSERT(isRemoved);
}
}
return NS_OK;
}
nsresult FileSystemDatabaseManagerVersion001::PrepareRenameEntry(
const FileSystemConnection& aConnection,
const FileSystemDataManager* const aDataManager,
const FileSystemEntryMetadata& aHandle, const Name& aNewName,
bool aIsFile) {
const EntryId& entryId = aHandle.entryId();
// At this point, entry exists
if (aIsFile) {
QM_TRY_UNWRAP(const bool isLocked, aDataManager->IsLocked(entryId));
if (isLocked) {
LOG(("Trying to move in-use file"));
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
}
// If the destination file exists, fail explicitly.
FileSystemChildMetadata destination;
QM_TRY_UNWRAP(EntryId parent, FindParent(mConnection, entryId));
destination.parentId() = parent;
destination.childName() = aNewName;
QM_TRY(MOZ_TO_RESULT(ClearDestinationIfNotLocked(mConnection, mDataManager,
aHandle, destination)));
return NS_OK;
}
nsresult FileSystemDatabaseManagerVersion001::PrepareMoveEntry(
const FileSystemConnection& aConnection,
const FileSystemDataManager* const aDataManager,
const FileSystemEntryMetadata& aHandle,
const FileSystemChildMetadata& aNewDesignation, bool aIsFile) {
const EntryId& entryId = aHandle.entryId();
// At this point, entry exists
if (aIsFile) {
QM_TRY_UNWRAP(const bool isLocked, aDataManager->IsLocked(entryId));
if (isLocked) {
LOG(("Trying to move in-use file"));
return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
}
}
QM_TRY(QM_TO_RESULT(ClearDestinationIfNotLocked(aConnection, aDataManager,
aHandle, aNewDesignation)));
// XXX: This should be before clearing the target
// To prevent cyclic paths, we check that there is no path from
// the item to be moved to the destination folder.
QM_TRY_UNWRAP(const bool isDestinationUnderSelf,
IsAncestor(aConnection, {entryId, aNewDesignation.parentId()}));
if (isDestinationUnderSelf) {
return NS_ERROR_DOM_INVALID_MODIFICATION_ERR;
}
return NS_OK;
}
/**
* Free functions
*/
Result<bool, QMResult> ApplyEntryExistsQuery(
const FileSystemConnection& aConnection, const nsACString& aQuery,
const FileSystemChildMetadata& aHandle) {
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, aQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("parent"_ns, aHandle.parentId())));
QM_TRY(QM_TO_RESULT(stmt.BindNameByName("name"_ns, aHandle.childName())));
return stmt.YesOrNoQuery();
}
Result<bool, QMResult> ApplyEntryExistsQuery(
const FileSystemConnection& aConnection, const nsACString& aQuery,
const EntryId& aEntry) {
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, aQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("handle"_ns, aEntry)));
return stmt.YesOrNoQuery();
}
Result<bool, QMResult> DoesFileExist(const FileSystemConnection& aConnection,
const EntryId& aEntryId) {
MOZ_ASSERT(!aEntryId.IsEmpty());
const nsCString existsQuery =
"SELECT EXISTS "
"(SELECT 1 FROM Files WHERE handle = :handle ) "
";"_ns;
QM_TRY_RETURN(ApplyEntryExistsQuery(aConnection, existsQuery, aEntryId));
}
Result<bool, QMResult> IsFile(const FileSystemConnection& aConnection,
const EntryId& aEntryId) {
QM_TRY_UNWRAP(bool exists, DoesFileExist(aConnection, aEntryId));
if (exists) {
return true;
}
QM_TRY_UNWRAP(exists, DoesDirectoryExist(aConnection, aEntryId));
if (exists) {
return false;
}
// Doesn't exist
return Err(QMResult(NS_ERROR_DOM_NOT_FOUND_ERR));
}
Result<EntryId, QMResult> FindEntryId(const FileSystemConnection& aConnection,
const FileSystemChildMetadata& aHandle,
bool aIsFile) {
const nsCString aDirectoryQuery =
"SELECT Entries.handle FROM Directories "
"INNER JOIN Entries USING (handle) "
"WHERE Directories.name = :name AND Entries.parent = :parent "
";"_ns;
const nsCString aFileQuery =
"SELECT Entries.handle FROM Files INNER JOIN Entries USING (handle) "
"WHERE Files.name = :name AND Entries.parent = :parent "
";"_ns;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(
aConnection, aIsFile ? aFileQuery : aDirectoryQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("parent"_ns, aHandle.parentId())));
QM_TRY(QM_TO_RESULT(stmt.BindNameByName("name"_ns, aHandle.childName())));
QM_TRY_UNWRAP(bool moreResults, stmt.ExecuteStep());
if (!moreResults) {
return Err(QMResult(NS_ERROR_DOM_NOT_FOUND_ERR));
}
QM_TRY_UNWRAP(EntryId entryId, stmt.GetEntryIdByColumn(/* Column */ 0u));
return entryId;
}
Result<EntryId, QMResult> FindParent(const FileSystemConnection& aConnection,
const EntryId& aEntryId) {
const nsCString aParentQuery =
"SELECT handle FROM Entries "
"WHERE handle IN ( "
"SELECT parent FROM Entries WHERE "
"handle = :entryId ) "
";"_ns;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, aParentQuery));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("entryId"_ns, aEntryId)));
QM_TRY_UNWRAP(bool moreResults, stmt.ExecuteStep());
if (!moreResults) {
return Err(QMResult(NS_ERROR_DOM_NOT_FOUND_ERR));
}
QM_TRY_UNWRAP(EntryId parentId, stmt.GetEntryIdByColumn(/* Column */ 0u));
return parentId;
}
Result<bool, QMResult> IsSame(const FileSystemConnection& aConnection,
const FileSystemEntryMetadata& aHandle,
const FileSystemChildMetadata& aNewHandle,
bool aIsFile) {
MOZ_ASSERT(!aNewHandle.parentId().IsEmpty());
// Typically aNewHandle does not exist which is not an error
QM_TRY_RETURN(QM_OR_ELSE_LOG_VERBOSE_IF(
// Expression.
FindEntryId(aConnection, aNewHandle, aIsFile)
.map([&aHandle](const EntryId& entryId) {
return entryId == aHandle.entryId();
}),
// Predicate.
IsSpecificError<NS_ERROR_DOM_NOT_FOUND_ERR>,
// Fallback.
ErrToOkFromQMResult<false>));
}
Result<Path, QMResult> ResolveReversedPath(
const FileSystemConnection& aConnection,
const FileSystemEntryPair& aEndpoints) {
const nsLiteralCString pathQuery =
"WITH RECURSIVE followPath(handle, parent) AS ( "
"SELECT handle, parent "
"FROM Entries "
"WHERE handle=:entryId "
"UNION "
"SELECT Entries.handle, Entries.parent FROM followPath, Entries "
"WHERE followPath.parent=Entries.handle ) "
"SELECT COALESCE(Directories.name, Files.name), handle "
"FROM followPath "
"LEFT JOIN Directories USING(handle) "
"LEFT JOIN Files USING(handle);"_ns;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, pathQuery));
QM_TRY(
QM_TO_RESULT(stmt.BindEntryIdByName("entryId"_ns, aEndpoints.childId())));
QM_TRY_UNWRAP(bool moreResults, stmt.ExecuteStep());
Path pathResult;
while (moreResults) {
QM_TRY_UNWRAP(Name entryName, stmt.GetNameByColumn(/* Column */ 0u));
QM_TRY_UNWRAP(EntryId entryId, stmt.GetEntryIdByColumn(/* Column */ 1u));
if (aEndpoints.parentId() == entryId) {
return pathResult;
}
pathResult.AppendElement(entryName);
QM_TRY_UNWRAP(moreResults, stmt.ExecuteStep());
}
// Spec wants us to return 'null' for not-an-ancestor case
pathResult.Clear();
return pathResult;
}
nsresult GetFileAttributes(const FileSystemConnection& aConnection,
const EntryId& aEntryId, ContentType& aType) {
const nsLiteralCString getFileLocation =
"SELECT type FROM Files INNER JOIN Entries USING(handle) "
"WHERE handle = :entryId "
";"_ns;
QM_TRY_UNWRAP(ResultStatement stmt,
ResultStatement::Create(aConnection, getFileLocation));
QM_TRY(QM_TO_RESULT(stmt.BindEntryIdByName("entryId"_ns, aEntryId)));
QM_TRY_UNWRAP(bool hasEntries, stmt.ExecuteStep());
// Type is an optional attribute
if (!hasEntries || stmt.IsNullByColumn(/* Column */ 0u)) {
return NS_OK;
}
QM_TRY_UNWRAP(aType, stmt.GetContentTypeByColumn(/* Column */ 0u));
return NS_OK;
}
// TODO: Implement idle maintenance
void TryRemoveDuringIdleMaintenance(
const nsTArray<FileId>& /* aItemToRemove */) {
// Not implemented
}
ContentType DetermineContentType(const Name& aName) {
QM_TRY_UNWRAP(
auto typeResult,
QM_OR_ELSE_LOG_VERBOSE(
FileSystemContentTypeGuess::FromPath(aName),
([](const auto& aRv) -> Result<ContentType, QMResult> {
const nsresult rv = ToNSResult(aRv);
switch (rv) {
case NS_ERROR_FAILURE: /* There is an unknown new extension. */
return ContentType(""_ns); /* We clear the old extension. */
case NS_ERROR_INVALID_ARG: /* The name is garbled. */
[[fallthrough]];
case NS_ERROR_NOT_AVAILABLE: /* There is no extension. */
return VoidCString(); /* We keep the old extension. */
default:
MOZ_ASSERT_UNREACHABLE("Should never get here!");
return Err(aRv);
}
})),
ContentType(""_ns));
return typeResult;
}
} // namespace fs::data
} // namespace mozilla::dom