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Merge pull request #290 from trapexit/epff
add existing path first found policy. closes #289
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| /* | ||
| Copyright (c) 2016, Antonio SJ Musumeci <[email protected]> | ||
| 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. | ||
| */ | ||
|
|
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| #include <errno.h> | ||
|
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| #include <string> | ||
| #include <vector> | ||
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| #include "fs.hpp" | ||
| #include "fs_path.hpp" | ||
| #include "policy.hpp" | ||
|
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| using std::string; | ||
| using std::vector; | ||
| using mergerfs::Category; | ||
|
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| static | ||
| int | ||
| _epff_create(const vector<string> &basepaths, | ||
| const char *fusepath, | ||
| const uint64_t minfreespace, | ||
| vector<const string*> &paths) | ||
| { | ||
| string fullpath; | ||
| const string *fallback; | ||
|
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| fallback = NULL; | ||
| for(size_t i = 0, ei = basepaths.size(); i != ei; i++) | ||
| { | ||
| bool readonly; | ||
| uint64_t spaceavail; | ||
| uint64_t _spaceused; | ||
| const string *basepath = &basepaths[i]; | ||
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| fs::path::make(basepath,fusepath,fullpath); | ||
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| if(!fs::exists(fullpath)) | ||
| continue; | ||
| if(!fs::info(*basepath,readonly,spaceavail,_spaceused)) | ||
| continue; | ||
| if(readonly) | ||
| continue; | ||
| if(fallback == NULL) | ||
| fallback = basepath; | ||
| if(spaceavail < minfreespace) | ||
| continue; | ||
|
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| paths.push_back(basepath); | ||
|
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| return POLICY_SUCCESS; | ||
| } | ||
|
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| if(fallback == NULL) | ||
| return POLICY_FAIL_ENOENT; | ||
|
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| paths.push_back(fallback); | ||
|
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| return POLICY_SUCCESS; | ||
| } | ||
|
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| static | ||
| int | ||
| _epff_other(const vector<string> &basepaths, | ||
| const char *fusepath, | ||
| vector<const string*> &paths) | ||
| { | ||
| string fullpath; | ||
|
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| for(size_t i = 0, ei = basepaths.size(); i != ei; i++) | ||
| { | ||
| const string *basepath = &basepaths[i]; | ||
|
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| fs::path::make(basepath,fusepath,fullpath); | ||
|
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| if(!fs::exists(fullpath)) | ||
| continue; | ||
|
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| paths.push_back(basepath); | ||
|
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| return POLICY_SUCCESS; | ||
| } | ||
|
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| return POLICY_FAIL_ENOENT; | ||
| } | ||
|
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| static | ||
| int | ||
| _epff(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 _epff_create(basepaths,fusepath,minfreespace,paths); | ||
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| return _epff_other(basepaths,fusepath,paths); | ||
| } | ||
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| namespace mergerfs | ||
| { | ||
| int | ||
| Policy::Func::epff(const Category::Enum::Type type, | ||
| const vector<string> &basepaths, | ||
| const char *fusepath, | ||
| const uint64_t minfreespace, | ||
| vector<const string*> &paths) | ||
| { | ||
| int rv; | ||
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| rv = _epff(type,basepaths,fusepath,minfreespace,paths); | ||
| if(POLICY_FAILED(rv)) | ||
| rv = Policy::Func::ff(type,basepaths,fusepath,minfreespace,paths); | ||
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| return rv; | ||
| } | ||
| } |