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// --------------------------------------------------------------------------
//
// File
// Name: BackupAccountControl.cpp
// Purpose: Client-side account management for Amazon S3 stores
// Created: 2015/06/27
//
// --------------------------------------------------------------------------
#include "Box.h"
#include <climits>
#include <iostream>
#include "autogen_CommonException.h"
#include "autogen_BackupStoreException.h"
#include "BackupAccountControl.h"
#include "BackupStoreConstants.h"
#include "BackupStoreDirectory.h"
#include "BackupStoreInfo.h"
#include "Configuration.h"
#include "HTTPResponse.h"
#include "Utils.h"
#include "MemLeakFindOn.h"
void BackupAccountControl::CheckSoftHardLimits(int64_t SoftLimit, int64_t HardLimit)
{
if(SoftLimit > HardLimit)
{
BOX_FATAL("Soft limit must be less than the hard limit.");
exit(1);
}
if(SoftLimit > ((HardLimit * MAX_SOFT_LIMIT_SIZE) / 100))
{
BOX_WARNING("We recommend setting the soft limit below " <<
MAX_SOFT_LIMIT_SIZE << "% of the hard limit, or " <<
HumanReadableSize((HardLimit * MAX_SOFT_LIMIT_SIZE)
/ 100) << " in this case.");
}
}
int64_t BackupAccountControl::SizeStringToBlocks(const char *string, int blockSize)
{
// Get number
char *endptr = (char*)string;
int64_t number = strtol(string, &endptr, 0);
if(endptr == string || number == LONG_MIN || number == LONG_MAX)
{
BOX_FATAL("'" << string << "' is not a valid number.");
exit(1);
}
// Check units
switch(*endptr)
{
case 'M':
case 'm':
// Units: Mb
return (number * 1024*1024) / blockSize;
break;
case 'G':
case 'g':
// Units: Gb
return (number * 1024*1024*1024) / blockSize;
break;
case 'B':
case 'b':
// Units: Blocks
// Easy! Just return the number specified.
return number;
break;
default:
BOX_FATAL(string << " has an invalid units specifier "
"(use B for blocks, M for MB, G for GB, eg 2GB)");
exit(1);
break;
}
}
std::string BackupAccountControl::BlockSizeToString(int64_t Blocks, int64_t MaxBlocks, int BlockSize)
{
return FormatUsageBar(Blocks, Blocks * BlockSize, MaxBlocks * BlockSize,
mMachineReadableOutput);
}
int BackupAccountControl::PrintAccountInfo(const BackupStoreInfo& info,
int BlockSize)
{
// Then print out lots of info
std::cout << FormatUsageLineStart("Account ID", mMachineReadableOutput) <<
BOX_FORMAT_ACCOUNT(info.GetAccountID()) << std::endl;
std::cout << FormatUsageLineStart("Account Name", mMachineReadableOutput) <<
info.GetAccountName() << std::endl;
std::cout << FormatUsageLineStart("Last object ID", mMachineReadableOutput) <<
BOX_FORMAT_OBJECTID(info.GetLastObjectIDUsed()) << std::endl;
std::cout << FormatUsageLineStart("Used", mMachineReadableOutput) <<
BlockSizeToString(info.GetBlocksUsed(),
info.GetBlocksHardLimit(), BlockSize) << std::endl;
std::cout << FormatUsageLineStart("Current files",
mMachineReadableOutput) <<
BlockSizeToString(info.GetBlocksInCurrentFiles(),
info.GetBlocksHardLimit(), BlockSize) << std::endl;
std::cout << FormatUsageLineStart("Old files", mMachineReadableOutput) <<
BlockSizeToString(info.GetBlocksInOldFiles(),
info.GetBlocksHardLimit(), BlockSize) << std::endl;
std::cout << FormatUsageLineStart("Deleted files", mMachineReadableOutput) <<
BlockSizeToString(info.GetBlocksInDeletedFiles(),
info.GetBlocksHardLimit(), BlockSize) << std::endl;
std::cout << FormatUsageLineStart("Directories", mMachineReadableOutput) <<
BlockSizeToString(info.GetBlocksInDirectories(),
info.GetBlocksHardLimit(), BlockSize) << std::endl;
std::cout << FormatUsageLineStart("Soft limit", mMachineReadableOutput) <<
BlockSizeToString(info.GetBlocksSoftLimit(),
info.GetBlocksHardLimit(), BlockSize) << std::endl;
std::cout << FormatUsageLineStart("Hard limit", mMachineReadableOutput) <<
BlockSizeToString(info.GetBlocksHardLimit(),
info.GetBlocksHardLimit(), BlockSize) << std::endl;
std::cout << FormatUsageLineStart("Client store marker", mMachineReadableOutput) <<
info.GetClientStoreMarker() << std::endl;
std::cout << FormatUsageLineStart("Current Files", mMachineReadableOutput) <<
info.GetNumCurrentFiles() << std::endl;
std::cout << FormatUsageLineStart("Old Files", mMachineReadableOutput) <<
info.GetNumOldFiles() << std::endl;
std::cout << FormatUsageLineStart("Deleted Files", mMachineReadableOutput) <<
info.GetNumDeletedFiles() << std::endl;
std::cout << FormatUsageLineStart("Directories", mMachineReadableOutput) <<
info.GetNumDirectories() << std::endl;
std::cout << FormatUsageLineStart("Enabled", mMachineReadableOutput) <<
(info.IsAccountEnabled() ? "yes" : "no") << std::endl;
return 0;
}
S3BackupAccountControl::S3BackupAccountControl(const Configuration& config,
bool machineReadableOutput)
: BackupAccountControl(config, machineReadableOutput)
{
if(!mConfig.SubConfigurationExists("S3Store"))
{
THROW_EXCEPTION_MESSAGE(CommonException,
InvalidConfiguration,
"The S3Store configuration subsection is required "
"when S3Store mode is enabled");
}
const Configuration s3config = mConfig.GetSubConfiguration("S3Store");
mBasePath = s3config.GetKeyValue("BasePath");
if(mBasePath.size() == 0)
{
mBasePath = "/";
}
else
{
if(mBasePath[0] != '/' || mBasePath[mBasePath.size() - 1] != '/')
{
THROW_EXCEPTION_MESSAGE(CommonException,
InvalidConfiguration,
"If S3Store.BasePath is not empty then it must start and "
"end with a slash, e.g. '/subdir/', but it currently does not.");
}
}
mapS3Client.reset(new S3Client(
s3config.GetKeyValue("HostName"),
s3config.GetKeyValueInt("Port"),
s3config.GetKeyValue("AccessKey"),
s3config.GetKeyValue("SecretKey")));
mapFileSystem.reset(new S3BackupFileSystem(mConfig, mBasePath, *mapS3Client));
}
std::string S3BackupAccountControl::GetFullURL(const std::string ObjectPath) const
{
const Configuration s3config = mConfig.GetSubConfiguration("S3Store");
return std::string("http://") + s3config.GetKeyValue("HostName") + ":" +
s3config.GetKeyValue("Port") + GetFullPath(ObjectPath);
}
int S3BackupAccountControl::CreateAccount(const std::string& name, int32_t SoftLimit,
int32_t HardLimit)
{
// Try getting the info file. If we get a 200 response then it already
// exists, and we should bail out. If we get a 404 then it's safe to
// continue. Otherwise something else is wrong and we should bail out.
std::string info_url = GetFullURL(S3_INFO_FILE_NAME);
HTTPResponse response = GetObject(S3_INFO_FILE_NAME);
if(response.GetResponseCode() == HTTPResponse::Code_OK)
{
THROW_EXCEPTION_MESSAGE(BackupStoreException, AccountAlreadyExists,
"The BackupStoreInfo file already exists at this URL: " <<
info_url);
}
if(response.GetResponseCode() != HTTPResponse::Code_NotFound)
{
mapS3Client->CheckResponse(response, std::string("Failed to check for an "
"existing BackupStoreInfo file at this URL: ") + info_url);
}
BackupStoreInfo info(0, // fake AccountID for S3 stores
info_url, // FileName,
SoftLimit, HardLimit);
info.SetAccountName(name);
// And an empty directory
BackupStoreDirectory rootDir(BACKUPSTORE_ROOT_DIRECTORY_ID, BACKUPSTORE_ROOT_DIRECTORY_ID);
int64_t rootDirSize = mapFileSystem->PutDirectory(rootDir);
// Update the store info to reflect the size of the root directory
info.ChangeBlocksUsed(rootDirSize);
info.ChangeBlocksInDirectories(rootDirSize);
info.AdjustNumDirectories(1);
int64_t id = info.AllocateObjectID();
ASSERT(id == BACKUPSTORE_ROOT_DIRECTORY_ID);
CollectInBufferStream out;
info.Save(out);
out.SetForReading();
response = PutObject(S3_INFO_FILE_NAME, out);
mapS3Client->CheckResponse(response, std::string("Failed to upload the new BackupStoreInfo "
"file to this URL: ") + info_url);
// Now get the file again, to check that it really worked.
response = GetObject(S3_INFO_FILE_NAME);
mapS3Client->CheckResponse(response, std::string("Failed to download the new BackupStoreInfo "
"file that we just created: ") + info_url);
return 0;
}
std::string S3BackupFileSystem::GetDirectoryURI(int64_t ObjectID)
{
std::ostringstream out;
out << mBasePath << "dirs/" << BOX_FORMAT_OBJECTID(ObjectID) << ".dir";
return out.str();
}
std::auto_ptr<HTTPResponse> S3BackupFileSystem::GetDirectory(BackupStoreDirectory& rDir)
{
std::string uri = GetDirectoryURI(rDir.GetObjectID());
HTTPResponse response = mrClient.GetObject(uri);
mrClient.CheckResponse(response,
std::string("Failed to download directory: ") + uri);
return std::auto_ptr<HTTPResponse>(new HTTPResponse(response));
}
int S3BackupFileSystem::PutDirectory(BackupStoreDirectory& rDir)
{
CollectInBufferStream out;
rDir.WriteToStream(out);
out.SetForReading();
std::string uri = GetDirectoryURI(rDir.GetObjectID());
HTTPResponse response = mrClient.PutObject(uri, out);
mrClient.CheckResponse(response,
std::string("Failed to upload directory: ") + uri);
int blocks = (out.GetSize() + S3_NOTIONAL_BLOCK_SIZE - 1) / S3_NOTIONAL_BLOCK_SIZE;
return blocks;
}
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