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add policy cache for 'open'

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A fusepath -> basepath cache for `open` to limit the overhead of FUSE in 'open, read/write, close' patterns (such as Transmission).
This commit is contained in:
Antonio SJ Musumeci 2019-01-06 12:52:55 -05:00
parent 8e0aa1d9a6
commit 7a057daa0c
44 changed files with 858 additions and 649 deletions
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104
src/policy.cpp
View file

@ -24,65 +24,63 @@
#define PRESERVES_PATH true
#define DOESNT_PRESERVE_PATH false
namespace mergerfs
{
const std::vector<Policy> Policy::_policies_ =
buildvector<Policy,true>
(POLICY(invalid,DOESNT_PRESERVE_PATH))
(POLICY(all,DOESNT_PRESERVE_PATH))
(POLICY(epall,PRESERVES_PATH))
(POLICY(epff,PRESERVES_PATH))
(POLICY(eplfs,PRESERVES_PATH))
(POLICY(eplus,PRESERVES_PATH))
(POLICY(epmfs,PRESERVES_PATH))
(POLICY(eprand,PRESERVES_PATH))
(POLICY(erofs,DOESNT_PRESERVE_PATH))
(POLICY(ff,DOESNT_PRESERVE_PATH))
(POLICY(lfs,DOESNT_PRESERVE_PATH))
(POLICY(lus,DOESNT_PRESERVE_PATH))
(POLICY(mfs,DOESNT_PRESERVE_PATH))
(POLICY(newest,DOESNT_PRESERVE_PATH))
(POLICY(rand,DOESNT_PRESERVE_PATH));
const std::vector<Policy> Policy::_policies_ =
buildvector<Policy,true>
(POLICY(invalid,DOESNT_PRESERVE_PATH))
(POLICY(all,DOESNT_PRESERVE_PATH))
(POLICY(epall,PRESERVES_PATH))
(POLICY(epff,PRESERVES_PATH))
(POLICY(eplfs,PRESERVES_PATH))
(POLICY(eplus,PRESERVES_PATH))
(POLICY(epmfs,PRESERVES_PATH))
(POLICY(eprand,PRESERVES_PATH))
(POLICY(erofs,DOESNT_PRESERVE_PATH))
(POLICY(ff,DOESNT_PRESERVE_PATH))
(POLICY(lfs,DOESNT_PRESERVE_PATH))
(POLICY(lus,DOESNT_PRESERVE_PATH))
(POLICY(mfs,DOESNT_PRESERVE_PATH))
(POLICY(newest,DOESNT_PRESERVE_PATH))
(POLICY(rand,DOESNT_PRESERVE_PATH));
const Policy * const Policy::policies = &_policies_[1];
const Policy * const Policy::policies = &_policies_[1];
#define CONST_POLICY(X) const Policy &Policy::X = Policy::policies[Policy::Enum::X]
CONST_POLICY(invalid);
CONST_POLICY(all);
CONST_POLICY(epall);
CONST_POLICY(epff);
CONST_POLICY(eplfs);
CONST_POLICY(eplus);
CONST_POLICY(epmfs);
CONST_POLICY(eprand);
CONST_POLICY(erofs);
CONST_POLICY(ff);
CONST_POLICY(lfs);
CONST_POLICY(lus);
CONST_POLICY(mfs);
CONST_POLICY(newest);
CONST_POLICY(rand);
CONST_POLICY(invalid);
CONST_POLICY(all);
CONST_POLICY(epall);
CONST_POLICY(epff);
CONST_POLICY(eplfs);
CONST_POLICY(eplus);
CONST_POLICY(epmfs);
CONST_POLICY(eprand);
CONST_POLICY(erofs);
CONST_POLICY(ff);
CONST_POLICY(lfs);
CONST_POLICY(lus);
CONST_POLICY(mfs);
CONST_POLICY(newest);
CONST_POLICY(rand);
const Policy&
Policy::find(const std::string &str)
const Policy&
Policy::find(const std::string &str)
{
for(int i = Enum::BEGIN; i != Enum::END; ++i)
{
for(int i = Enum::BEGIN; i != Enum::END; ++i)
{
if(policies[i] == str)
return policies[i];
}
return invalid;
}
const Policy&
Policy::find(const Policy::Enum::Type i)
{
if(i >= Policy::Enum::BEGIN &&
i < Policy::Enum::END)
if(policies[i] == str)
return policies[i];
return invalid;
}
return invalid;
}
const Policy&
Policy::find(const Policy::Enum::Type i)
{
if(i >= Policy::Enum::BEGIN &&
i < Policy::Enum::END)
return policies[i];
return invalid;
}