mirror of
https://github.com/trapexit/mergerfs.git
synced 2024-12-01 21:13:44 +08:00
143 lines
3.7 KiB
C++
143 lines
3.7 KiB
C++
/*
|
|
Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
|
|
|
|
Permission to use, copy, modify, and/or distribute this software for any
|
|
purpose with or without fee is hereby granted, provided that the above
|
|
copyright notice and this permission notice appear in all copies.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include "branches.hpp"
|
|
#include "errno.hpp"
|
|
#include "fs_exists.hpp"
|
|
#include "fs_info.hpp"
|
|
#include "fs_path.hpp"
|
|
#include "fs_statvfs_cache.hpp"
|
|
#include "policy.hpp"
|
|
#include "policy_epff.hpp"
|
|
#include "policy_error.hpp"
|
|
#include "rwlock.hpp"
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
using std::string;
|
|
using std::vector;
|
|
|
|
namespace epff
|
|
{
|
|
static
|
|
int
|
|
create(const Branches::CPtr &branches_,
|
|
const char *fusepath_,
|
|
StrVec *paths_)
|
|
{
|
|
int rv;
|
|
int error;
|
|
fs::info_t info;
|
|
|
|
error = ENOENT;
|
|
for(auto &branch : *branches_)
|
|
{
|
|
if(branch.ro_or_nc())
|
|
error_and_continue(error,EROFS);
|
|
if(!fs::exists(branch.path,fusepath_))
|
|
error_and_continue(error,ENOENT);
|
|
rv = fs::info(branch.path,&info);
|
|
if(rv == -1)
|
|
error_and_continue(error,ENOENT);
|
|
if(info.readonly)
|
|
error_and_continue(error,EROFS);
|
|
if(info.spaceavail < branch.minfreespace())
|
|
error_and_continue(error,ENOSPC);
|
|
|
|
paths_->push_back(branch.path);
|
|
|
|
return 0;
|
|
}
|
|
|
|
return (errno=error,-1);
|
|
}
|
|
|
|
static
|
|
int
|
|
action(const Branches::CPtr &branches_,
|
|
const char *fusepath_,
|
|
StrVec *paths_)
|
|
{
|
|
int rv;
|
|
int error;
|
|
bool readonly;
|
|
|
|
error = ENOENT;
|
|
for(auto &branch : *branches_)
|
|
{
|
|
if(branch.ro())
|
|
error_and_continue(error,EROFS);
|
|
if(!fs::exists(branch.path,fusepath_))
|
|
error_and_continue(error,ENOENT);
|
|
rv = fs::statvfs_cache_readonly(branch.path,&readonly);
|
|
if(rv == -1)
|
|
error_and_continue(error,ENOENT);
|
|
if(readonly)
|
|
error_and_continue(error,EROFS);
|
|
|
|
paths_->push_back(branch.path);
|
|
|
|
return 0;
|
|
}
|
|
|
|
return (errno=error,-1);
|
|
}
|
|
|
|
static
|
|
int
|
|
search(const Branches::CPtr &branches_,
|
|
const char *fusepath_,
|
|
StrVec *paths_)
|
|
{
|
|
for(auto &branch : *branches_)
|
|
{
|
|
if(!fs::exists(branch.path,fusepath_))
|
|
continue;
|
|
|
|
paths_->push_back(branch.path);
|
|
|
|
return 0;
|
|
}
|
|
|
|
return (errno=ENOENT,-1);
|
|
}
|
|
}
|
|
|
|
int
|
|
Policy::EPFF::Action::operator()(const Branches::CPtr &branches_,
|
|
const char *fusepath_,
|
|
StrVec *paths_) const
|
|
{
|
|
return ::epff::action(branches_,fusepath_,paths_);
|
|
}
|
|
|
|
int
|
|
Policy::EPFF::Create::operator()(const Branches::CPtr &branches_,
|
|
const char *fusepath_,
|
|
StrVec *paths_) const
|
|
{
|
|
return ::epff::create(branches_,fusepath_,paths_);
|
|
}
|
|
|
|
int
|
|
Policy::EPFF::Search::operator()(const Branches::CPtr &branches_,
|
|
const char *fusepath_,
|
|
StrVec *paths_) const
|
|
{
|
|
return ::epff::search(branches_,fusepath_,paths_);
|
|
}
|