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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "common/debug.h"
#include "common/errno.h"
#include "Driver.h"
#include "Watcher.h"
#define dout_context g_ceph_context
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "rbd::ggate::Watcher: " << this \
<< " " << __func__ << ": "
namespace rbd {
namespace ggate {
Watcher::Watcher(Driver *drv, librados::IoCtx &ioctx, librbd::Image &image,
size_t size)
: m_drv(drv), m_ioctx(ioctx), m_image(image), m_size(size) {
}
void Watcher::handle_notify() {
dout(20) << dendl;
librbd::image_info_t info;
if (m_image.stat(info, sizeof(info)) == 0) {
size_t new_size = info.size;
if (new_size != m_size) {
int r = m_drv->resize(new_size);
if (r < 0) {
derr << "resize failed: " << cpp_strerror(r) << dendl;
m_drv->shut_down();
}
r = m_image.invalidate_cache();
if (r < 0) {
derr << "invalidate rbd cache failed: " << cpp_strerror(r) << dendl;
m_drv->shut_down();
}
m_size = new_size;
}
}
}
} // namespace ggate
} // namespace rbd
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