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Merge pull request #108 from trapexit/error-policies

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create errno policies for simulating errors. closes #107
This commit is contained in:
Antonio SJ Musumeci 2015-08-27 22:52:20 -04:00
commit fd26793305
9 changed files with 269 additions and 12 deletions
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1
README.md
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@ -73,6 +73,7 @@ Filesystem calls are broken up into 3 categories: **action**, **create**, **sear
| lfs (least free space) | Pick the path with least available space but more than **minfreespace**. |
| rand (random) | Pick an existing destination at random. |
| all | Applies action to all found. For searches it will behave like first found **ff**. |
| enosys, einval, enotsup, exdev, erofs | Exclusively return `-1` with `errno` set to the respective value. Useful for debugging other applications' behavior to errors. |
#### Defaults ####

32
src/policy.cpp
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@ -36,7 +36,12 @@ namespace mergerfs
buildvector<Policy,true>
(POLICY(invalid))
(POLICY(all))
(POLICY(einval))
(POLICY(enosys))
(POLICY(enotsup))
(POLICY(epmfs))
(POLICY(erofs))
(POLICY(exdev))
(POLICY(ff))
(POLICY(ffwp))
(POLICY(fwfs))
@ -47,16 +52,23 @@ namespace mergerfs
const Policy * const Policy::policies = &_policies_[1];
const Policy &Policy::invalid = Policy::policies[Policy::Enum::invalid];
const Policy &Policy::all = Policy::policies[Policy::Enum::all];
const Policy &Policy::epmfs = Policy::policies[Policy::Enum::epmfs];
const Policy &Policy::ff = Policy::policies[Policy::Enum::ff];
const Policy &Policy::ffwp = Policy::policies[Policy::Enum::ffwp];
const Policy &Policy::fwfs = Policy::policies[Policy::Enum::fwfs];
const Policy &Policy::lfs = Policy::policies[Policy::Enum::lfs];
const Policy &Policy::mfs = Policy::policies[Policy::Enum::mfs];
const Policy &Policy::newest = Policy::policies[Policy::Enum::newest];
const Policy &Policy::rand = Policy::policies[Policy::Enum::rand];
#define CONST_POLICY(X) const Policy &Policy::X = Policy::policies[Policy::Enum::X]
CONST_POLICY(invalid);
CONST_POLICY(all);
CONST_POLICY(einval);
CONST_POLICY(enosys);
CONST_POLICY(enotsup);
CONST_POLICY(epmfs);
CONST_POLICY(erofs);
CONST_POLICY(exdev);
CONST_POLICY(ff);
CONST_POLICY(ffwp);
CONST_POLICY(fwfs);
CONST_POLICY(lfs);
CONST_POLICY(mfs);
CONST_POLICY(newest);
CONST_POLICY(rand);
const Policy&
Policy::find(const std::string &str)

16
src/policy.hpp
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@ -45,7 +45,12 @@ namespace mergerfs
invalid = -1,
BEGIN = 0,
all = BEGIN,
einval,
enosys,
enotsup,
epmfs,
erofs,
exdev,
ff,
ffwp,
fwfs,
@ -120,12 +125,17 @@ namespace mergerfs
const Ptr func;
};
static int invalid(CType,cstrvec&,cstring&,csize_t,strvec&);
static int all(CType,cstrvec&,cstring&,csize_t,strvec&);
static int einval(CType,cstrvec&,cstring&,csize_t,strvec&);
static int enosys(CType,cstrvec&,cstring&,csize_t,strvec&);
static int enotsup(CType,cstrvec&,cstring&,csize_t,strvec&);
static int epmfs(CType,cstrvec&,cstring&,csize_t,strvec&);
static int erofs(CType,cstrvec&,cstring&,csize_t,strvec&);
static int exdev(CType,cstrvec&,cstring&,csize_t,strvec&);
static int ff(CType,cstrvec&,cstring&,csize_t,strvec&);
static int ffwp(CType,cstrvec&,cstring&,csize_t,strvec&);
static int fwfs(CType,cstrvec&,cstring&,csize_t,strvec&);
static int invalid(CType,cstrvec&,cstring&,csize_t,strvec&);
static int lfs(CType,cstrvec&,cstring&,csize_t,strvec&);
static int mfs(CType,cstrvec&,cstring&,csize_t,strvec&);
static int newest(CType,cstrvec&,cstring&,csize_t,strvec&);
@ -183,7 +193,11 @@ namespace mergerfs
static const Policy &invalid;
static const Policy &all;
static const Policy &enosys;
static const Policy &enotsup;
static const Policy &epmfs;
static const Policy &erofs;
static const Policy &exdev;
static const Policy &ff;
static const Policy &ffwp;
static const Policy &fwfs;

46
src/policy_einval.cpp Normal file
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@ -0,0 +1,46 @@
/*
The MIT License (MIT)
Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <errno.h>
#include <string>
#include <vector>
#include "policy.hpp"
using std::string;
using std::vector;
namespace mergerfs
{
int
Policy::Func::einval(const Category::Enum::Type type,
const vector<string> &basepaths,
const string &fusepath,
const size_t minfreespace,
vector<string> &paths)
{
return (errno=EINVAL,-1);
}
}

46
src/policy_enosys.cpp Normal file
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@ -0,0 +1,46 @@
/*
The MIT License (MIT)
Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <errno.h>
#include <string>
#include <vector>
#include "policy.hpp"
using std::string;
using std::vector;
namespace mergerfs
{
int
Policy::Func::enosys(const Category::Enum::Type type,
const vector<string> &basepaths,
const string &fusepath,
const size_t minfreespace,
vector<string> &paths)
{
return (errno=ENOSYS,-1);
}
}

46
src/policy_enotsup.cpp Normal file
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@ -0,0 +1,46 @@
/*
The MIT License (MIT)
Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <errno.h>
#include <string>
#include <vector>
#include "policy.hpp"
using std::string;
using std::vector;
namespace mergerfs
{
int
Policy::Func::enotsup(const Category::Enum::Type type,
const vector<string> &basepaths,
const string &fusepath,
const size_t minfreespace,
vector<string> &paths)
{
return (errno=ENOTSUP,-1);
}
}

46
src/policy_erofs.cpp Normal file
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@ -0,0 +1,46 @@
/*
The MIT License (MIT)
Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <errno.h>
#include <string>
#include <vector>
#include "policy.hpp"
using std::string;
using std::vector;
namespace mergerfs
{
int
Policy::Func::erofs(const Category::Enum::Type type,
const vector<string> &basepaths,
const string &fusepath,
const size_t minfreespace,
vector<string> &paths)
{
return (errno=EROFS,-1);
}
}

46
src/policy_exdev.cpp Normal file
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@ -0,0 +1,46 @@
/*
The MIT License (MIT)
Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <errno.h>
#include <string>
#include <vector>
#include "policy.hpp"
using std::string;
using std::vector;
namespace mergerfs
{
int
Policy::Func::exdev(const Category::Enum::Type type,
const vector<string> &basepaths,
const string &fusepath,
const size_t minfreespace,
vector<string> &paths)
{
return (errno=EXDEV,-1);
}
}

2
src/policy_invalid.cpp
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@ -42,6 +42,6 @@ namespace mergerfs
const size_t minfreespace,
vector<string> &rv)
{
return (errno = EINVAL,-1);
return (errno=EINVAL,-1);
}
}