mirror of
https://github.com/trapexit/mergerfs.git
synced 2024-12-02 13:33:39 +08:00
143 lines
3.4 KiB
C++
143 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.hpp"
|
|
#include "fs_exists.hpp"
|
|
#include "fs_info.hpp"
|
|
#include "fs_path.hpp"
|
|
#include "policy.hpp"
|
|
|
|
#include <limits>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
using std::string;
|
|
using std::vector;
|
|
using mergerfs::Category;
|
|
|
|
static
|
|
int
|
|
_lfs_create(const vector<string> &basepaths,
|
|
const uint64_t minfreespace,
|
|
vector<const string*> &paths)
|
|
{
|
|
int rv;
|
|
uint64_t lfs;
|
|
fs::info_t info;
|
|
const string *basepath;
|
|
const string *lfsbasepath;
|
|
|
|
lfs = std::numeric_limits<uint64_t>::max();
|
|
lfsbasepath = NULL;
|
|
for(size_t i = 0, ei = basepaths.size(); i != ei; i++)
|
|
{
|
|
basepath = &basepaths[i];
|
|
|
|
rv = fs::info(basepath,&info);
|
|
if(rv == -1)
|
|
continue;
|
|
if(info.readonly)
|
|
continue;
|
|
if(info.spaceavail < minfreespace)
|
|
continue;
|
|
if(info.spaceavail > lfs)
|
|
continue;
|
|
|
|
lfs = info.spaceavail;
|
|
lfsbasepath = basepath;
|
|
}
|
|
|
|
if(lfsbasepath == NULL)
|
|
return (errno=ENOENT,-1);
|
|
|
|
paths.push_back(lfsbasepath);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int
|
|
_lfs_other(const vector<string> &basepaths,
|
|
const char *fusepath,
|
|
vector<const string*> &paths)
|
|
{
|
|
int rv;
|
|
uint64_t lfs;
|
|
uint64_t spaceavail;
|
|
const string *basepath;
|
|
const string *lfsbasepath;
|
|
|
|
lfs = std::numeric_limits<uint64_t>::max();
|
|
lfsbasepath = NULL;
|
|
for(size_t i = 0, ei = basepaths.size(); i != ei; i++)
|
|
{
|
|
basepath = &basepaths[i];
|
|
|
|
if(!fs::exists(*basepath,fusepath))
|
|
continue;
|
|
rv = fs::spaceavail(basepath,&spaceavail);
|
|
if(rv == -1)
|
|
continue;
|
|
if(spaceavail > lfs)
|
|
continue;
|
|
|
|
lfs = spaceavail;
|
|
lfsbasepath = basepath;
|
|
}
|
|
|
|
if(lfsbasepath == NULL)
|
|
return (errno=ENOENT,-1);
|
|
|
|
paths.push_back(lfsbasepath);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int
|
|
_lfs(const Category::Enum::Type type,
|
|
const vector<string> &basepaths,
|
|
const char *fusepath,
|
|
const uint64_t minfreespace,
|
|
vector<const string*> &paths)
|
|
{
|
|
if(type == Category::Enum::create)
|
|
return _lfs_create(basepaths,minfreespace,paths);
|
|
|
|
return _lfs_other(basepaths,fusepath,paths);
|
|
}
|
|
|
|
|
|
namespace mergerfs
|
|
{
|
|
int
|
|
Policy::Func::lfs(const Category::Enum::Type type,
|
|
const vector<string> &basepaths,
|
|
const char *fusepath,
|
|
const uint64_t minfreespace,
|
|
vector<const string*> &paths)
|
|
{
|
|
int rv;
|
|
|
|
rv = _lfs(type,basepaths,fusepath,minfreespace,paths);
|
|
if(rv == -1)
|
|
rv = Policy::Func::mfs(type,basepaths,fusepath,minfreespace,paths);
|
|
|
|
return rv;
|
|
}
|
|
}
|