mirror of
https://github.com/trapexit/mergerfs.git
synced 2024-11-30 04:23:43 +08:00
127 lines
3.4 KiB
C++
127 lines
3.4 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 "errno.hpp"
|
|
#include "fs_exists.hpp"
|
|
#include "fs_info.hpp"
|
|
#include "fs_path.hpp"
|
|
#include "fs_statvfs_cache.hpp"
|
|
#include "policies.hpp"
|
|
#include "policy.hpp"
|
|
#include "policy_error.hpp"
|
|
#include "policy_msplfs.hpp"
|
|
#include "strvec.hpp"
|
|
|
|
#include <limits>
|
|
#include <string>
|
|
|
|
using std::string;
|
|
|
|
|
|
namespace msplfs
|
|
{
|
|
static
|
|
const
|
|
string*
|
|
create_1(const Branches::CPtr &branches_,
|
|
const string &fusepath_,
|
|
int *err_)
|
|
{
|
|
int rv;
|
|
uint64_t lfs;
|
|
fs::info_t info;
|
|
const string *basepath;
|
|
|
|
basepath = NULL;
|
|
lfs = std::numeric_limits<uint64_t>::max();
|
|
for(const auto &branch : *branches_)
|
|
{
|
|
if(branch.ro_or_nc())
|
|
error_and_continue(*err_,EROFS);
|
|
if(!fs::exists(branch.path,fusepath_))
|
|
error_and_continue(*err_,ENOENT);
|
|
rv = fs::info(branch.path,&info);
|
|
if(rv == -1)
|
|
error_and_continue(*err_,ENOENT);
|
|
if(info.readonly)
|
|
error_and_continue(*err_,EROFS);
|
|
if(info.spaceavail < branch.minfreespace())
|
|
error_and_continue(*err_,ENOSPC);
|
|
if(info.spaceavail > lfs)
|
|
continue;
|
|
|
|
lfs = info.spaceavail;
|
|
basepath = &branch.path;
|
|
}
|
|
|
|
return basepath;
|
|
}
|
|
|
|
static
|
|
int
|
|
create(const Branches::CPtr &branches_,
|
|
const char *fusepath_,
|
|
StrVec *paths_)
|
|
{
|
|
int error;
|
|
string fusepath;
|
|
const string *basepath;
|
|
|
|
error = ENOENT;
|
|
fusepath = fusepath_;
|
|
for(;;)
|
|
{
|
|
basepath = msplfs::create_1(branches_,fusepath,&error);
|
|
if(basepath)
|
|
break;
|
|
if(fusepath == "/")
|
|
break;
|
|
fusepath = fs::path::dirname(fusepath);
|
|
}
|
|
|
|
if(basepath == NULL)
|
|
return (errno=error,-1);
|
|
|
|
paths_->push_back(*basepath);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int
|
|
Policy::MSPLFS::Action::operator()(const Branches::CPtr &branches_,
|
|
const char *fusepath_,
|
|
StrVec *paths_) const
|
|
{
|
|
return Policies::Action::eplfs(branches_,fusepath_,paths_);
|
|
}
|
|
|
|
int
|
|
Policy::MSPLFS::Create::operator()(const Branches::CPtr &branches_,
|
|
const char *fusepath_,
|
|
StrVec *paths_) const
|
|
{
|
|
return ::msplfs::create(branches_,fusepath_,paths_);
|
|
}
|
|
|
|
int
|
|
Policy::MSPLFS::Search::operator()(const Branches::CPtr &branches_,
|
|
const char *fusepath_,
|
|
StrVec *paths_) const
|
|
{
|
|
return Policies::Search::eplfs(branches_,fusepath_,paths_);
|
|
}
|