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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/errno.h"
#include "librbd/ImageCtx.h"
#include "librbd/LibrbdAdminSocketHook.h"
#include "librbd/internal.h"
#include "librbd/io/ImageRequestWQ.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbdadminsocket: "
namespace librbd {
class LibrbdAdminSocketCommand {
public:
virtual ~LibrbdAdminSocketCommand() {}
virtual bool call(stringstream *ss) = 0;
};
class FlushCacheCommand : public LibrbdAdminSocketCommand {
public:
explicit FlushCacheCommand(ImageCtx *ictx) : ictx(ictx) {}
bool call(stringstream *ss) override {
int r = ictx->io_work_queue->flush();
if (r < 0) {
*ss << "flush: " << cpp_strerror(r);
return false;
}
return true;
}
private:
ImageCtx *ictx;
};
struct InvalidateCacheCommand : public LibrbdAdminSocketCommand {
public:
explicit InvalidateCacheCommand(ImageCtx *ictx) : ictx(ictx) {}
bool call(stringstream *ss) override {
int r = invalidate_cache(ictx);
if (r < 0) {
*ss << "invalidate_cache: " << cpp_strerror(r);
return false;
}
return true;
}
private:
ImageCtx *ictx;
};
LibrbdAdminSocketHook::LibrbdAdminSocketHook(ImageCtx *ictx) :
admin_socket(ictx->cct->get_admin_socket()) {
std::string command;
std::string imagename;
int r;
imagename = ictx->md_ctx.get_pool_name() + "/" + ictx->name;
command = "rbd cache flush " + imagename;
r = admin_socket->register_command(command, command, this,
"flush rbd image " + imagename +
" cache");
if (r == 0) {
commands[command] = new FlushCacheCommand(ictx);
}
command = "rbd cache invalidate " + imagename;
r = admin_socket->register_command(command, command, this,
"invalidate rbd image " + imagename +
" cache");
if (r == 0) {
commands[command] = new InvalidateCacheCommand(ictx);
}
}
LibrbdAdminSocketHook::~LibrbdAdminSocketHook() {
for (Commands::const_iterator i = commands.begin(); i != commands.end();
++i) {
(void)admin_socket->unregister_command(i->first);
delete i->second;
}
}
bool LibrbdAdminSocketHook::call(std::string_view command,
const cmdmap_t& cmdmap,
std::string_view format,
bufferlist& out) {
Commands::const_iterator i = commands.find(command);
ceph_assert(i != commands.end());
stringstream ss;
bool r = i->second->call(&ss);
out.append(ss);
return r;
}
} // namespace librbd
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