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NFS open/creat hack
NFS open/creat hack
A hack to work around non-POSIX NFS <-> FUSE behavior where it turns an open(O_EXCL|O_CREAT,0444) into multiple calls that results in EACCES.pull/786/head
Antonio SJ Musumeci
5 years ago
12 changed files with 280 additions and 18 deletions
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14README.md
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31man/mergerfs.1
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2src/config.cpp
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4src/config.hpp
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53src/config_nfsopenhack.cpp
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30src/config_nfsopenhack.hpp
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11src/fs_cow.cpp
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17src/fs_path.hpp
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4src/fuse_chmod.cpp
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2src/fuse_fchmod.cpp
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72src/fuse_open.cpp
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48src/stat_util.hpp
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/*
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ISC License |
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Copyright (c) 2020, Antonio SJ Musumeci <trapexit@spawn.link> |
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Permission to use, copy, modify, and/or distribute this software for any |
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purpose with or without fee is hereby granted, provided that the above |
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copyright notice and this permission notice appear in all copies. |
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include "config_nfsopenhack.hpp"
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#include "ef.hpp"
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template<> |
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int |
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NFSOpenHack::from_string(const std::string &s_) |
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{ |
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if(s_ == "off") |
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_data = NFSOpenHack::ENUM::OFF; |
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ef(s_ == "git") |
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_data = NFSOpenHack::ENUM::GIT; |
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ef(s_ == "all") |
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_data = NFSOpenHack::ENUM::ALL; |
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else |
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return -EINVAL; |
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return 0; |
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} |
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template<> |
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std::string |
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NFSOpenHack::to_string(void) const |
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{ |
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switch(_data) |
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{ |
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case NFSOpenHack::ENUM::OFF: |
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return "off"; |
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case NFSOpenHack::ENUM::GIT: |
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return "git"; |
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case NFSOpenHack::ENUM::ALL: |
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return "all"; |
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} |
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return std::string(); |
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} |
@ -0,0 +1,30 @@ |
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/*
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ISC License |
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|
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Copyright (c) 2020, Antonio SJ Musumeci <trapexit@spawn.link> |
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|
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Permission to use, copy, modify, and/or distribute this software for any |
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purpose with or without fee is hereby granted, provided that the above |
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copyright notice and this permission notice appear in all copies. |
|||
|
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
|||
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#pragma once
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#include "enum.hpp"
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enum class NFSOpenHackEnum |
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{ |
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OFF, |
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GIT, |
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ALL |
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}; |
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typedef Enum<NFSOpenHackEnum> NFSOpenHack; |
@ -0,0 +1,48 @@ |
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/*
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ISC License |
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Copyright (c) 2020, Antonio SJ Musumeci <trapexit@spawn.link> |
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|
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Permission to use, copy, modify, and/or distribute this software for any |
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purpose with or without fee is hereby granted, provided that the above |
|||
copyright notice and this permission notice appear in all copies. |
|||
|
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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 |
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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 |
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#pragma once
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#include <sys/stat.h>
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namespace StatUtil |
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{ |
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static |
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inline |
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bool |
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empty(const struct stat &st_) |
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{ |
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return (st_.st_size == 0); |
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} |
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static |
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inline |
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bool |
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writable(const struct stat &st_) |
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{ |
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return (st_.st_mode & (S_IWUSR|S_IWGRP|S_IWOTH)); |
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} |
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static |
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inline |
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bool |
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writable_or_not_empty(const struct stat &st_) |
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{ |
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return (StatUtil::writable(st_) || !StatUtil::empty(st_)); |
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} |
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} |
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