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/* Copyright © 2005-2007 Roger Leigh <rleigh@debian.org>
*
* schroot is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* schroot is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*********************************************************************/
#include <config.h>
#include "sbuild-chroot-lvm-snapshot.h"
#include "sbuild-format-detail.h"
#include "sbuild-lock.h"
#include <cerrno>
#include <iostream>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <unistd.h>
#include <boost/format.hpp>
using std::endl;
using boost::format;
using namespace sbuild;
chroot_lvm_snapshot::chroot_lvm_snapshot ():
chroot_block_device(),
chroot_source(),
snapshot_device(),
snapshot_options()
{
set_run_setup_scripts(true);
set_run_exec_scripts(true);
}
chroot_lvm_snapshot::~chroot_lvm_snapshot ()
{
}
sbuild::chroot::ptr
chroot_lvm_snapshot::clone () const
{
return ptr(new chroot_lvm_snapshot(*this));
}
sbuild::chroot::ptr
chroot_lvm_snapshot::clone_source () const
{
ptr clone(new chroot_block_device(*this));
chroot_source::clone_source_setup(clone);
return clone;
}
std::string const&
chroot_lvm_snapshot::get_snapshot_device () const
{
return this->snapshot_device;
}
void
chroot_lvm_snapshot::set_snapshot_device (std::string const& snapshot_device)
{
if (!is_absname(snapshot_device))
throw error(snapshot_device, DEVICE_ABS);
this->snapshot_device = snapshot_device;
}
std::string const&
chroot_lvm_snapshot::get_mount_device () const
{
return this->snapshot_device;
}
std::string const&
chroot_lvm_snapshot::get_snapshot_options () const
{
return this->snapshot_options;
}
void
chroot_lvm_snapshot::set_snapshot_options (std::string const& snapshot_options)
{
this->snapshot_options = snapshot_options;
}
std::string const&
chroot_lvm_snapshot::get_chroot_type () const
{
static const std::string type("lvm-snapshot");
return type;
}
void
chroot_lvm_snapshot::setup_env (environment& env)
{
chroot_block_device::setup_env(env);
chroot_source::setup_env(env);
env.add("CHROOT_LVM_SNAPSHOT_NAME", sbuild::basename(get_snapshot_device()));
env.add("CHROOT_LVM_SNAPSHOT_DEVICE", get_snapshot_device());
env.add("CHROOT_LVM_SNAPSHOT_OPTIONS", get_snapshot_options());
}
void
chroot_lvm_snapshot::setup_lock (chroot::setup_type type,
bool lock,
int status)
{
std::string device;
struct stat statbuf;
/* Lock is removed by setup script on setup stop. Unlocking here
would fail: the LVM snapshot device no longer exists. */
if (!(type == SETUP_STOP && lock == false))
{
if (type == SETUP_START)
device = get_device();
else
device = get_snapshot_device();
if (device.empty())
{
throw error(CHROOT_DEVICE);
}
else if (stat(device.c_str(), &statbuf) == -1)
{
throw error(get_device(), DEVICE_STAT, strerror(errno));
}
else if (!S_ISBLK(statbuf.st_mode))
{
throw error(get_device(), DEVICE_NOTBLOCK);
}
else
{
/* Lock is preserved while running a command. */
if ((type == EXEC_START && lock == false) ||
(type == EXEC_STOP && lock == true))
return;
sbuild::device_lock dlock(device);
if (lock)
{
try
{
dlock.set_lock(lock::LOCK_EXCLUSIVE, 15);
}
catch (sbuild::lock::error const& e)
{
throw error(get_device(), DEVICE_LOCK, e);
}
}
else
{
try
{
dlock.unset_lock();
}
catch (sbuild::lock::error const& e)
{
throw error(get_device(), DEVICE_UNLOCK, e);
}
}
}
}
/* Create or unlink session information. */
if ((type == SETUP_START && lock == true) ||
(type == SETUP_STOP && lock == false && status == 0))
{
bool start = (type == SETUP_START);
setup_session_info(start);
}
}
sbuild::chroot::session_flags
chroot_lvm_snapshot::get_session_flags () const
{
return SESSION_CREATE;
}
void
chroot_lvm_snapshot::get_details (format_detail& detail) const
{
chroot_block_device::get_details(detail);
chroot_source::get_details(detail);
if (!this->snapshot_device.empty())
detail.add(_("LVM Snapshot Device"), get_snapshot_device());
if (!this->snapshot_options.empty())
detail.add(_("LVM Snapshot Options"), get_snapshot_options());
}
void
chroot_lvm_snapshot::get_keyfile (keyfile& keyfile) const
{
chroot_block_device::get_keyfile(keyfile);
chroot_source::get_keyfile(keyfile);
if (get_active())
keyfile::set_object_value(*this, &chroot_lvm_snapshot::get_snapshot_device,
keyfile, get_name(), "lvm-snapshot-device");
keyfile::set_object_value(*this, &chroot_lvm_snapshot::get_snapshot_options,
keyfile, get_name(), "lvm-snapshot-options");
}
void
chroot_lvm_snapshot::set_keyfile (keyfile const& keyfile)
{
chroot_block_device::set_keyfile(keyfile);
chroot_source::set_keyfile(keyfile);
keyfile::get_object_value(*this, &chroot_lvm_snapshot::set_snapshot_device,
keyfile, get_name(), "lvm-snapshot-device",
get_active() ?
keyfile::PRIORITY_REQUIRED :
keyfile::PRIORITY_DISALLOWED);
keyfile::get_object_value(*this, &chroot_lvm_snapshot::set_snapshot_options,
keyfile, get_name(), "lvm-snapshot-options",
keyfile::PRIORITY_REQUIRED);
}
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