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// --------------------------------------------------------------------------
//
// File
// Name: BackupStoreAccounts.cpp
// Purpose: Account management for backup store server
// Created: 2003/08/21
//
// --------------------------------------------------------------------------
#include "Box.h"
#include <stdio.h>
#include "BackupStoreAccounts.h"
#include "BackupStoreAccountDatabase.h"
#include "BackupStoreConstants.h"
#include "BackupStoreDirectory.h"
#include "BackupStoreException.h"
#include "BackupStoreInfo.h"
#include "BackupStoreRefCountDatabase.h"
#include "BoxPortsAndFiles.h"
#include "RaidFileWrite.h"
#include "StoreStructure.h"
#include "UnixUser.h"
#include "MemLeakFindOn.h"
// --------------------------------------------------------------------------
//
// Function
// Name: BackupStoreAccounts::BackupStoreAccounts(BackupStoreAccountDatabase &)
// Purpose: Constructor
// Created: 2003/08/21
//
// --------------------------------------------------------------------------
BackupStoreAccounts::BackupStoreAccounts(BackupStoreAccountDatabase &rDatabase)
: mrDatabase(rDatabase)
{
}
// --------------------------------------------------------------------------
//
// Function
// Name: BackupStoreAccounts::~BackupStoreAccounts()
// Purpose: Destructor
// Created: 2003/08/21
//
// --------------------------------------------------------------------------
BackupStoreAccounts::~BackupStoreAccounts()
{
}
// --------------------------------------------------------------------------
//
// Function
// Name: BackupStoreAccounts::Create(int32_t, int, int64_t, int64_t, const std::string &)
// Purpose: Create a new account on the specified disc set.
// If rAsUsername is not empty, then the account information will be written under the
// username specified.
// Created: 2003/08/21
//
// --------------------------------------------------------------------------
void BackupStoreAccounts::Create(int32_t ID, int DiscSet, int64_t SizeSoftLimit, int64_t SizeHardLimit, const std::string &rAsUsername)
{
// Create the entry in the database
BackupStoreAccountDatabase::Entry Entry(mrDatabase.AddEntry(ID,
DiscSet));
{
// Become the user specified in the config file?
std::auto_ptr<UnixUser> user;
if(!rAsUsername.empty())
{
// Username specified, change...
user.reset(new UnixUser(rAsUsername.c_str()));
user->ChangeProcessUser(true /* temporary */);
// Change will be undone at the end of this function
}
// Get directory name
std::string dirName(MakeAccountRootDir(ID, DiscSet));
// Create a directory on disc
RaidFileWrite::CreateDirectory(DiscSet, dirName, true /* recursive */);
// Create an info file
BackupStoreInfo::CreateNew(ID, dirName, DiscSet, SizeSoftLimit, SizeHardLimit);
// And an empty directory
BackupStoreDirectory rootDir(BACKUPSTORE_ROOT_DIRECTORY_ID, BACKUPSTORE_ROOT_DIRECTORY_ID);
int64_t rootDirSize = 0;
// Write it, knowing the directory scheme
{
RaidFileWrite rf(DiscSet, dirName + "o01");
rf.Open();
rootDir.WriteToStream(rf);
rootDirSize = rf.GetDiscUsageInBlocks();
rf.Commit(true);
}
// Update the store info to reflect the size of the root directory
std::auto_ptr<BackupStoreInfo> info(BackupStoreInfo::Load(ID, dirName, DiscSet, false /* ReadWrite */));
info->ChangeBlocksUsed(rootDirSize);
info->ChangeBlocksInDirectories(rootDirSize);
info->AdjustNumDirectories(1);
// Save it back
info->Save();
// Create the refcount database
BackupStoreRefCountDatabase::CreateNew(Entry);
std::auto_ptr<BackupStoreRefCountDatabase> refcount(
BackupStoreRefCountDatabase::Load(Entry, false));
refcount->AddReference(BACKUPSTORE_ROOT_DIRECTORY_ID);
}
// As the original user...
// Write the database back
mrDatabase.Write();
}
// --------------------------------------------------------------------------
//
// Function
// Name: BackupStoreAccounts::GetAccountRoot(int32_t, std::string &, int &)
// Purpose: Gets the root of an account, returning the info via references
// Created: 2003/08/21
//
// --------------------------------------------------------------------------
void BackupStoreAccounts::GetAccountRoot(int32_t ID, std::string &rRootDirOut, int &rDiscSetOut) const
{
// Find the account
const BackupStoreAccountDatabase::Entry &en(mrDatabase.GetEntry(ID));
rRootDirOut = MakeAccountRootDir(ID, en.GetDiscSet());
rDiscSetOut = en.GetDiscSet();
}
// --------------------------------------------------------------------------
//
// Function
// Name: BackupStoreAccounts::MakeAccountRootDir(int32_t, int)
// Purpose: Private. Generates a root directory name for the account
// Created: 2003/08/21
//
// --------------------------------------------------------------------------
std::string BackupStoreAccounts::MakeAccountRootDir(int32_t ID, int DiscSet)
{
char accid[64]; // big enough!
::sprintf(accid, "%08x" DIRECTORY_SEPARATOR, ID);
return std::string(std::string(BOX_RAIDFILE_ROOT_BBSTORED
DIRECTORY_SEPARATOR) + accid);
}
// --------------------------------------------------------------------------
//
// Function
// Name: BackupStoreAccounts::AccountExists(int32_t)
// Purpose: Does an account exist?
// Created: 2003/08/21
//
// --------------------------------------------------------------------------
bool BackupStoreAccounts::AccountExists(int32_t ID)
{
return mrDatabase.EntryExists(ID);
}
void BackupStoreAccounts::LockAccount(int32_t ID, NamedLock& rNamedLock)
{
const BackupStoreAccountDatabase::Entry &en(mrDatabase.GetEntry(ID));
std::string rootDir = MakeAccountRootDir(ID, en.GetDiscSet());
int discSet = en.GetDiscSet();
std::string writeLockFilename;
StoreStructure::MakeWriteLockFilename(rootDir, discSet, writeLockFilename);
bool gotLock = false;
int triesLeft = 8;
do
{
gotLock = rNamedLock.TryAndGetLock(writeLockFilename,
0600 /* restrictive file permissions */);
if(!gotLock)
{
--triesLeft;
::sleep(1);
}
}
while (!gotLock && triesLeft > 0);
if (!gotLock)
{
THROW_EXCEPTION_MESSAGE(BackupStoreException,
CouldNotLockStoreAccount, "Failed to get exclusive "
"lock on account " << ID);
}
}
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