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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2017 Red Hat Ltd
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#ifndef FS_COMMANDS_H_
#define FS_COMMANDS_H_
#include "Monitor.h"
#include "CommandHandler.h"
#include "osd/OSDMap.h"
#include "mds/FSMap.h"
#include <string>
#include <ostream>
class FileSystemCommandHandler : protected CommandHandler
{
protected:
std::string prefix;
using fs_or_fscid = std::variant<Filesystem*, fs_cluster_id_t>;
enum {
POOL_METADATA,
POOL_DATA_DEFAULT,
POOL_DATA_EXTRA,
};
/**
* Return 0 if the pool is suitable for use with CephFS, or
* in case of errors return a negative error code, and populate
* the passed ostream with an explanation.
*
* @param metadata whether the pool will be for metadata (stricter checks)
*/
int _check_pool(
OSDMap &osd_map,
const int64_t pool_id,
int type,
bool force,
std::ostream *ss,
bool allow_overlay = false) const;
virtual std::string const &get_prefix() const {return prefix;}
int set_val(Monitor *mon, FSMap& fsmap, MonOpRequestRef op, const cmdmap_t& cmdmap, std::ostream &ss, fs_or_fscid fs, std::string var, std::string val);
public:
FileSystemCommandHandler(const std::string &prefix_)
: prefix(prefix_)
{}
virtual ~FileSystemCommandHandler()
{}
int is_op_allowed(const MonOpRequestRef& op, const FSMap& fsmap,
const cmdmap_t& cmdmap, std::ostream &ss) const;
int can_handle(std::string const &prefix_, MonOpRequestRef& op, FSMap& fsmap,
const cmdmap_t& cmdmap, std::ostream &ss) const
{
if (get_prefix() != prefix_) {
return 0;
}
if (get_prefix() == "fs new" || get_prefix() == "fs flag set") {
return 1;
}
return is_op_allowed(op, fsmap, cmdmap, ss);
}
static std::list<std::shared_ptr<FileSystemCommandHandler> > load(Paxos *paxos);
virtual int handle(
Monitor *mon,
FSMap &fsmap,
MonOpRequestRef op,
const cmdmap_t& cmdmap,
std::ostream &ss) = 0;
};
static constexpr auto errmsg_for_unhealthy_mds = \
"MDS has one of two health warnings which could extend recovery: "
"MDS_TRIM or MDS_CACHE_OVERSIZED. MDS failover is not recommended "
"since it might cause unexpected file system unavailability. If "
"you wish to proceed, pass --yes-i-really-mean-it";
#endif
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