Merge pull request #865 from trapexit/config

config: rework global config, remove rwlock, make branches RCU like

LICENSE

@@ -1,7 +1,7 @@
 /*
   ISC License
 
-  Copyright (c) 2020, Antonio SJ Musumeci <trapexit@spawn.link>
+  Copyright (c) 2021, 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

Makefile

@@ -58,13 +58,20 @@ LTO_FLAGS :=
 endif
 
 SRC	    = $(wildcard src/*.cpp)
-OBJS        = $(SRC:src/%.cpp=build/%.o)
-DEPS        = $(SRC:src/%.cpp=build/%.d)
+OBJS        = $(SRC:src/%.cpp=build/.src/%.o)
+DEPS        = $(SRC:src/%.cpp=build/.src/%.d)
+
+TESTS       = $(wildcard tests/*.cpp)
+TESTS_OBJS  = $(filter-out build/.src/mergerfs.o,$(OBJS))
+TESTS_OBJS += $(TESTS:tests/%.cpp=build/.tests/%.o)
+TESTS_DEPS  = $(TESTS:tests/%.cpp=build/.tests/%.d)
+TESTS_DEPS += $(DEPS)
+
 MANPAGE     = mergerfs.1
 CXXFLAGS    ?= ${OPT_FLAGS}
 CXXFLAGS    := \
               ${CXXFLAGS} \
-              -std=c++0x \
+              -std=c++11 \
               $(STATIC_FLAGS) \
               $(LTO_FLAGS) \
               -Wall \
@@ -77,6 +84,9 @@ FUSE_FLAGS = \
 MFS_FLAGS  = \
 	      -DUSE_XATTR=$(USE_XATTR) \
 	      -DUGID_USE_RWLOCK=$(UGID_USE_RWLOCK)
+TESTS_FLAGS = \
+              -Isrc \
+              -DTESTS
 
 LDFLAGS := \
     ${LDFLAGS} \
@@ -110,11 +120,19 @@ help:
 objects: version build/stamp
 	$(MAKE) $(OBJS)
 
+tests-objects:
+	$(MAKE) $(TESTS_OBJS)
+
 build/mergerfs: libfuse objects
 	$(CXX) $(CXXFLAGS) $(FUSE_FLAGS) $(MFS_FLAGS) $(CPPFLAGS) $(OBJS) -o $@ libfuse/build/libfuse.a $(LDFLAGS)
 
+build/tests: build/mergerfs tests-objects
+	$(CXX) $(CXXFLAGS) $(TESTS_FLAGS) $(FUSE_FLAGS) $(MFS_FLAGS) $(CPPFLAGS) $(TESTS_OBJS) -o $@ libfuse/build/libfuse.a $(LDFLAGS)
+
 mergerfs: build/mergerfs
 
+tests: build/tests
+
 changelog:
 ifeq ($(GIT_REPO),1)
 	$(GIT2DEBCL) --name mergerfs > ChangeLog
@@ -127,12 +145,16 @@ version:
 	tools/update-version
 
 build/stamp:
-	$(MKDIR) -p build
+	$(MKDIR) -p build/.src build/.tests
 	$(TOUCH) $@
 
-build/%.o: src/%.cpp
+build/.src/%.o: src/%.cpp
 	$(CXX) $(CXXFLAGS) $(FUSE_FLAGS) $(MFS_FLAGS) $(CPPFLAGS) -c $< -o $@
 
+build/.tests/%.o: tests/%.cpp
+	$(CXX) $(CXXFLAGS) $(TESTS_FLAGS) $(FUSE_FLAGS) $(MFS_FLAGS) $(CPPFLAGS) -c $< -o $@
+
+
 .PHONY: clean
 clean: rpm-clean
 	$(RM) -rf build

src/branch.cpp

@@ -18,21 +18,8 @@
 
 #include "branch.hpp"
 #include "ef.hpp"
-#include "from_string.hpp"
-#include "fs_glob.hpp"
-#include "fs_realpathize.hpp"
-#include "nonstd/optional.hpp"
+#include "errno.hpp"
 #include "num.hpp"
-#include "str.hpp"
-
-#include <string>
-
-#include <errno.h>
-#include <fnmatch.h>
-
-using std::string;
-using std::vector;
-using nonstd::optional;
 
 
 Branch::Branch(const uint64_t &default_minfreespace_)
@@ -108,354 +95,3 @@ Branch::ro_or_nc(void) const
   return ((mode == Branch::Mode::RO) ||
           (mode == Branch::Mode::NC));
 }
-
-namespace l
-{
-  static
-  void
-  split(const std::string &s_,
-        std::string       *instr_,
-        std::string       *values_)
-  {
-    uint64_t offset;
-
-    offset = s_.find_first_of('/');
-    *instr_ = s_.substr(0,offset);
-    if(offset != std::string::npos)
-      *values_ = s_.substr(offset);
-  }
-}
-
-Branches::Branches(const uint64_t &default_minfreespace_)
-  : default_minfreespace(default_minfreespace_)
-{
-  pthread_rwlock_init(&lock,NULL);
-}
-
-namespace l
-{
-  static
-  int
-  parse_mode(const string &str_,
-             Branch::Mode *mode_)
-  {
-    if(str_ == "RW")
-      *mode_ = Branch::Mode::RW;
-    ef(str_ == "RO")
-      *mode_ = Branch::Mode::RO;
-    ef(str_ == "NC")
-      *mode_ = Branch::Mode::NC;
-    else
-      return -EINVAL;
-
-    return 0;
-  }
-
-  static
-  int
-  parse_minfreespace(const string       &str_,
-                     optional<uint64_t> *minfreespace_)
-  {
-    int rv;
-    uint64_t uint64;
-
-    rv = str::from(str_,&uint64);
-    if(rv < 0)
-      return rv;
-
-    *minfreespace_ = uint64;
-
-    return 0;
-  }
-
-  static
-  int
-  parse_branch(const string       &str_,
-               string             *glob_,
-               Branch::Mode       *mode_,
-               optional<uint64_t> *minfreespace_)
-  {
-    int rv;
-    string options;
-    vector<string> v;
-
-    str::rsplit1(str_,'=',&v);
-    switch(v.size())
-      {
-      case 1:
-        *glob_ = v[0];
-        *mode_ = Branch::Mode::RW;
-        break;
-      case 2:
-        *glob_  = v[0];
-        options = v[1];
-        v.clear();
-        str::split(options,',',&v);
-        switch(v.size())
-          {
-          case 2:
-            rv = l::parse_minfreespace(v[1],minfreespace_);
-            if(rv < 0)
-              return rv;
-          case 1:
-            rv = l::parse_mode(v[0],mode_);
-            if(rv < 0)
-              return rv;
-            break;
-          case 0:
-            return -EINVAL;
-          }
-        break;
-      default:
-        return -EINVAL;
-      }
-
-    return 0;
-  }
-
-  static
-  int
-  parse(const string   &str_,
-        const uint64_t &default_minfreespace_,
-        BranchVec      *branches_)
-  {
-    int rv;
-    string glob;
-    vector<string> globbed;
-    optional<uint64_t> minfreespace;
-    Branch branch(default_minfreespace_);
-
-    rv = l::parse_branch(str_,&glob,&branch.mode,&minfreespace);
-    if(rv < 0)
-      return rv;
-
-    if(minfreespace.has_value())
-      branch.set_minfreespace(minfreespace.value());
-
-    fs::glob(glob,&globbed);
-    fs::realpathize(&globbed);
-    for(size_t i = 0; i < globbed.size(); i++)
-      {
-        branch.path = globbed[i];
-        branches_->push_back(branch);
-      }
-
-    return 0;
-  }
-
-  static
-  int
-  set(const std::string &str_,
-      Branches          *branches_)
-  {
-    int rv;
-    vector<string> paths;
-    BranchVec tmp_branchvec;
-
-    str::split(str_,':',&paths);
-
-    for(size_t i = 0; i < paths.size(); i++)
-      {
-        rv = l::parse(paths[i],branches_->default_minfreespace,&tmp_branchvec);
-        if(rv < 0)
-          return rv;
-      }
-
-    branches_->vec.clear();
-    branches_->vec.insert(branches_->vec.end(),
-                          tmp_branchvec.begin(),
-                          tmp_branchvec.end());
-
-    return 0;
-  }
-
-  static
-  int
-  add_begin(const std::string &str_,
-            Branches          *branches_)
-  {
-    int rv;
-    vector<string> paths;
-    BranchVec tmp_branchvec;
-
-    str::split(str_,':',&paths);
-
-    for(size_t i = 0; i < paths.size(); i++)
-      {
-        rv = l::parse(paths[i],branches_->default_minfreespace,&tmp_branchvec);
-        if(rv < 0)
-          return rv;
-      }
-
-    branches_->vec.insert(branches_->vec.begin(),
-                          tmp_branchvec.begin(),
-                          tmp_branchvec.end());
-
-    return 0;
-  }
-
-  static
-  int
-  add_end(const std::string &str_,
-          Branches          *branches_)
-  {
-    int rv;
-    vector<string> paths;
-    BranchVec tmp_branchvec;
-
-    str::split(str_,':',&paths);
-
-    for(size_t i = 0; i < paths.size(); i++)
-      {
-        rv = l::parse(paths[i],branches_->default_minfreespace,&tmp_branchvec);
-        if(rv < 0)
-          return rv;
-      }
-
-    branches_->vec.insert(branches_->vec.end(),
-                          tmp_branchvec.begin(),
-                          tmp_branchvec.end());
-
-    return 0;
-  }
-
-  static
-  int
-  erase_begin(BranchVec *branches_)
-  {
-    branches_->erase(branches_->begin());
-
-    return 0;
-  }
-
-  static
-  int
-  erase_end(BranchVec *branches_)
-  {
-    branches_->pop_back();
-
-    return 0;
-  }
-
-  static
-  int
-  erase_fnmatch(const std::string &str_,
-                Branches          *branches_)
-  {
-    vector<string> patterns;
-
-    str::split(str_,':',&patterns);
-
-    for(BranchVec::iterator i = branches_->vec.begin();
-        i != branches_->vec.end();)
-      {
-        int match = FNM_NOMATCH;
-
-        for(vector<string>::const_iterator pi = patterns.begin();
-            pi != patterns.end() && match != 0;
-            ++pi)
-          {
-            match = ::fnmatch(pi->c_str(),i->path.c_str(),0);
-          }
-
-        i = ((match == 0) ? branches_->vec.erase(i) : (i+1));
-      }
-
-    return 0;
-  }
-}
-
-int
-Branches::from_string(const std::string &s_)
-{
-  rwlock::WriteGuard guard(lock);
-
-  std::string instr;
-  std::string values;
-
-  l::split(s_,&instr,&values);
-
-  if(instr == "+")
-    return l::add_end(values,this);
-  if(instr == "+<")
-    return l::add_begin(values,this);
-  if(instr == "+>")
-    return l::add_end(values,this);
-  if(instr == "-")
-    return l::erase_fnmatch(values,this);
-  if(instr == "-<")
-    return l::erase_begin(&vec);
-  if(instr == "->")
-    return l::erase_end(&vec);
-  if(instr == "=")
-    return l::set(values,this);
-  if(instr.empty())
-    return l::set(values,this);
-
-  return -EINVAL;
-}
-
-string
-Branches::to_string(void) const
-{
-  rwlock::ReadGuard guard(lock);
-
-  string tmp;
-
-  for(size_t i = 0; i < vec.size(); i++)
-    {
-      const Branch &branch = vec[i];
-
-      tmp += branch.to_string();
-      tmp += ':';
-    }
-
-  if(*tmp.rbegin() == ':')
-    tmp.erase(tmp.size() - 1);
-
-  return tmp;
-}
-
-void
-Branches::to_paths(vector<string> &vec_) const
-{
-  rwlock::ReadGuard guard(lock);
-
-  for(size_t i = 0; i < vec.size(); i++)
-    {
-      const Branch &branch = vec[i];
-
-      vec_.push_back(branch.path);
-    }
-}
-
-SrcMounts::SrcMounts(Branches &b_)
-  : _branches(b_)
-{
-
-}
-
-int
-SrcMounts::from_string(const std::string &s_)
-{
-  return _branches.from_string(s_);
-}
-
-std::string
-SrcMounts::to_string(void) const
-{
-  rwlock::ReadGuard guard(_branches.lock);
-
-  std::string rv;
-
-  for(uint64_t i = 0; i < _branches.vec.size(); i++)
-    {
-      rv += _branches.vec[i].path;
-      rv += ':';
-    }
-
-  if(*rv.rbegin() == ':')
-    rv.erase(rv.size() - 1);
-
-  return rv;
-}

src/branch.hpp

@@ -18,24 +18,22 @@
 
 #pragma once
 
-#include "rwlock.hpp"
-#include "tofrom_string.hpp"
 #include "nonstd/optional.hpp"
+#include "strvec.hpp"
+#include "tofrom_string.hpp"
 
+#include <cstdint>
 #include <string>
 #include <vector>
 
-#include <stdint.h>
-#include <pthread.h>
 
-class Branch : public ToFromString
+class Branch final : public ToFromString
 {
 public:
-  Branch(const uint64_t &default_minfreespace);
+  typedef std::vector<Branch> Vector;
 
 public:
-  int from_string(const std::string &str);
-  std::string to_string(void) const;
+  Branch(const uint64_t &default_minfreespace_);
 
 public:
   enum class Mode
@@ -46,53 +44,24 @@ public:
      NC
     };
 
-public:
-  Mode        mode;
-  std::string path;
-  uint64_t    minfreespace() const;
-
-public:
-  void set_minfreespace(const uint64_t minfreespace);
-
 public:
   bool ro(void) const;
   bool nc(void) const;
   bool ro_or_nc(void) const;
 
-private:
-  nonstd::optional<uint64_t>  _minfreespace;
-  const uint64_t             *_default_minfreespace;
-};
-
-typedef std::vector<Branch> BranchVec;
-
-class Branches : public ToFromString
-{
-public:
-  Branches(const uint64_t &default_minfreespace_);
-
-public:
-  int from_string(const std::string &str);
-  std::string to_string(void) const;
-
-public:
-  void to_paths(std::vector<std::string> &vec) const;
-
 public:
-  mutable pthread_rwlock_t lock;
-  BranchVec vec;
-  const uint64_t &default_minfreespace;
-};
+  int from_string(const std::string &str) final;
+  std::string to_string(void) const final;
 
-class SrcMounts : public ToFromString
-{
 public:
-  SrcMounts(Branches &b_);
+  uint64_t minfreespace() const;
+  void set_minfreespace(const uint64_t);
 
 public:
-  int from_string(const std::string &str);
-  std::string to_string(void) const;
+  Mode mode;
+  std::string path;
 
 private:
-  Branches &_branches;
+  nonstd::optional<uint64_t>  _minfreespace;
+  const uint64_t             *_default_minfreespace;
 };

src/branches.cpp

@@ -0,0 +1,429 @@
+/*
+  ISC License
+
+  Copyright (c) 2021, 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 "branches.hpp"
+#include "ef.hpp"
+#include "errno.hpp"
+#include "from_string.hpp"
+#include "fs_glob.hpp"
+#include "fs_realpathize.hpp"
+#include "nonstd/optional.hpp"
+#include "num.hpp"
+#include "str.hpp"
+
+#include <string>
+
+#include <fnmatch.h>
+
+using std::string;
+using std::vector;
+using nonstd::optional;
+
+
+Branches::Impl::Impl(const uint64_t &default_minfreespace_)
+  : _default_minfreespace(default_minfreespace_)
+{
+}
+
+Branches::Impl&
+Branches::Impl::operator=(Branches::Impl &rval_)
+{
+  auto this_base = dynamic_cast<Branch::Vector*>(this);
+  auto rval_base = dynamic_cast<Branch::Vector*>(&rval_);
+
+  *this_base = *rval_base;
+
+  return *this;
+}
+
+Branches::Impl&
+Branches::Impl::operator=(Branches::Impl &&rval_)
+{
+  auto this_base = dynamic_cast<Branch::Vector*>(this);
+  auto rval_base = dynamic_cast<Branch::Vector*>(&rval_);
+
+  *this_base = std::move(*rval_base);
+
+  return *this;
+}
+
+const
+uint64_t&
+Branches::Impl::minfreespace(void) const
+{
+  return _default_minfreespace;
+}
+
+namespace l
+{
+  static
+  void
+  split(const std::string &s_,
+        std::string       *instr_,
+        std::string       *values_)
+  {
+    uint64_t offset;
+
+    offset = s_.find_first_of('/');
+    *instr_ = s_.substr(0,offset);
+    if(offset != std::string::npos)
+      *values_ = s_.substr(offset);
+  }
+
+  static
+  int
+  parse_mode(const string &str_,
+             Branch::Mode *mode_)
+  {
+    if(str_ == "RW")
+      *mode_ = Branch::Mode::RW;
+    ef(str_ == "RO")
+      *mode_ = Branch::Mode::RO;
+    ef(str_ == "NC")
+      *mode_ = Branch::Mode::NC;
+    else
+      return -EINVAL;
+
+    return 0;
+  }
+
+  static
+  int
+  parse_minfreespace(const string       &str_,
+                     optional<uint64_t> *minfreespace_)
+  {
+    int rv;
+    uint64_t uint64;
+
+    rv = str::from(str_,&uint64);
+    if(rv < 0)
+      return rv;
+
+    *minfreespace_ = uint64;
+
+    return 0;
+  }
+
+  static
+  int
+  parse_branch(const string       &str_,
+               string             *glob_,
+               Branch::Mode       *mode_,
+               optional<uint64_t> *minfreespace_)
+  {
+    int rv;
+    string options;
+    vector<string> v;
+
+    str::rsplit1(str_,'=',&v);
+    switch(v.size())
+      {
+      case 1:
+        *glob_ = v[0];
+        *mode_ = Branch::Mode::RW;
+        break;
+      case 2:
+        *glob_  = v[0];
+        options = v[1];
+        v.clear();
+        str::split(options,',',&v);
+        switch(v.size())
+          {
+          case 2:
+            rv = l::parse_minfreespace(v[1],minfreespace_);
+            if(rv < 0)
+              return rv;
+          case 1:
+            rv = l::parse_mode(v[0],mode_);
+            if(rv < 0)
+              return rv;
+            break;
+          case 0:
+            return -EINVAL;
+          }
+        break;
+      default:
+        return -EINVAL;
+      }
+
+    return 0;
+  }
+
+  static
+  int
+  parse(const string   &str_,
+        Branches::Impl *branches_)
+  {
+    int rv;
+    string glob;
+    StrVec paths;
+    optional<uint64_t> minfreespace;
+    Branch branch(branches_->minfreespace());
+
+    rv = l::parse_branch(str_,&glob,&branch.mode,&minfreespace);
+    if(rv < 0)
+      return rv;
+
+    if(minfreespace.has_value())
+      branch.set_minfreespace(minfreespace.value());
+
+    fs::glob(glob,&paths);
+    fs::realpathize(&paths);
+    for(auto &path : paths)
+      {
+        branch.path = path;
+        branches_->push_back(branch);
+      }
+
+    return 0;
+  }
+
+  static
+  int
+  set(const std::string &str_,
+      Branches::Impl    *branches_)
+  {
+    int rv;
+    StrVec paths;
+    Branches::Impl tmp_branches(branches_->minfreespace());
+
+    str::split(str_,':',&paths);
+    for(auto &path : paths)
+      {
+        rv = l::parse(path,&tmp_branches);
+        if(rv < 0)
+          return rv;
+      }
+
+    *branches_ = std::move(tmp_branches);
+
+    return 0;
+  }
+
+  static
+  int
+  add_begin(const std::string &str_,
+            Branches::Impl    *branches_)
+  {
+    int rv;
+    vector<string> paths;
+    Branches::Impl tmp_branches(branches_->minfreespace());
+
+    str::split(str_,':',&paths);
+    for(auto &path : paths)
+      {
+        rv = l::parse(path,&tmp_branches);
+        if(rv < 0)
+          return rv;
+      }
+
+    branches_->insert(branches_->begin(),
+                      tmp_branches.begin(),
+                      tmp_branches.end());
+
+    return 0;
+  }
+
+  static
+  int
+  add_end(const std::string &str_,
+          Branches::Impl    *branches_)
+  {
+    int rv;
+    StrVec paths;
+    Branches::Impl tmp_branches(branches_->minfreespace());
+
+    str::split(str_,':',&paths);
+    for(auto &path : paths)
+      {
+        rv = l::parse(path,&tmp_branches);
+        if(rv < 0)
+          return rv;
+      }
+
+    branches_->insert(branches_->end(),
+                      tmp_branches.begin(),
+                      tmp_branches.end());
+
+    return 0;
+  }
+
+  static
+  int
+  erase_begin(Branches::Impl *branches_)
+  {
+    branches_->erase(branches_->begin());
+
+    return 0;
+  }
+
+  static
+  int
+  erase_end(Branches::Impl *branches_)
+  {
+    branches_->pop_back();
+
+    return 0;
+  }
+
+  static
+  int
+  erase_fnmatch(const std::string &str_,
+                Branches::Impl    *branches_)
+  {
+    StrVec patterns;
+
+    str::split(str_,':',&patterns);
+    for(auto i = branches_->begin(); i != branches_->end();)
+      {
+        int match = FNM_NOMATCH;
+
+        for(auto pi = patterns.cbegin(); pi != patterns.cend() && match != 0; ++pi)
+          {
+            match = ::fnmatch(pi->c_str(),i->path.c_str(),0);
+          }
+
+        i = ((match == 0) ? branches_->erase(i) : (i+1));
+      }
+
+    return 0;
+  }
+}
+
+int
+Branches::Impl::from_string(const std::string &s_)
+{
+  std::string instr;
+  std::string values;
+
+  l::split(s_,&instr,&values);
+
+  if(instr == "+")
+    return l::add_end(values,this);
+  if(instr == "+<")
+    return l::add_begin(values,this);
+  if(instr == "+>")
+    return l::add_end(values,this);
+  if(instr == "-")
+    return l::erase_fnmatch(values,this);
+  if(instr == "-<")
+    return l::erase_begin(this);
+  if(instr == "->")
+    return l::erase_end(this);
+  if(instr == "=")
+    return l::set(values,this);
+  if(instr.empty())
+    return l::set(values,this);
+
+  return -EINVAL;
+}
+
+std::string
+Branches::Impl::to_string(void) const
+{
+  string tmp;
+
+  if(empty())
+    return tmp;
+
+  for(auto &branch : *this)
+    {
+      tmp += branch.to_string();
+      tmp += ':';
+    }
+
+  tmp.pop_back();
+
+  return tmp;
+}
+
+void
+Branches::Impl::to_paths(StrVec &paths_) const
+{
+  for(auto &branch : *this)
+    {
+      paths_.push_back(branch.path);
+    }
+}
+
+int
+Branches::from_string(const std::string &str_)
+{
+  int rv;
+  Branches::Ptr impl;
+  Branches::Ptr new_impl;
+
+  {
+    std::lock_guard<std::mutex> lock_guard(_mutex);
+    impl = _impl;
+  }
+
+  new_impl = std::make_shared<Branches::Impl>(impl->minfreespace());
+  *new_impl = *impl;
+
+  rv = new_impl->from_string(str_);
+  if(rv < 0)
+    return rv;
+
+  {
+    std::lock_guard<std::mutex> lock_guard(_mutex);
+    _impl = new_impl;
+  }
+
+  return 0;
+}
+
+string
+Branches::to_string(void) const
+{
+  std::lock_guard<std::mutex> lock_guard(_mutex);
+
+  return _impl->to_string();
+}
+
+SrcMounts::SrcMounts(Branches &b_)
+  : _branches(b_)
+{
+
+}
+
+int
+SrcMounts::from_string(const std::string &s_)
+{
+  return _branches.from_string(s_);
+}
+
+std::string
+SrcMounts::to_string(void) const
+{
+  std::string rv;
+  Branches::CPtr branches = _branches;
+
+  if(branches->empty())
+    return rv;
+
+  for(const auto &branch : *branches)
+    {
+      rv += branch.path;
+      rv += ':';
+    }
+
+  rv.pop_back();
+
+  return rv;
+}

src/branches.hpp

@@ -0,0 +1,94 @@
+/*
+  ISC License
+
+  Copyright (c) 2021, 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.
+*/
+
+#pragma once
+
+#include "branch.hpp"
+#include "nonstd/optional.hpp"
+#include "strvec.hpp"
+#include "tofrom_string.hpp"
+
+#include <cstdint>
+#include <memory>
+#include <mutex>
+#include <string>
+#include <vector>
+
+
+class Branches final : public ToFromString
+{
+public:
+  class Impl final : public ToFromString, public Branch::Vector
+  {
+  public:
+    typedef std::shared_ptr<Impl> Ptr;
+    typedef std::shared_ptr<const Impl> CPtr;
+
+  public:
+    Impl(const uint64_t &default_minfreespace_);
+
+  public:
+    int from_string(const std::string &str) final;
+    std::string to_string(void) const final;
+
+  public:
+    const uint64_t& minfreespace(void) const;
+    void to_paths(StrVec &strvec) const;
+
+  public:
+    Impl& operator=(Impl &impl_);
+    Impl& operator=(Impl &&impl_);
+
+  private:
+    const uint64_t &_default_minfreespace;
+  };
+
+public:
+  typedef Branches::Impl::Ptr  Ptr;
+  typedef Branches::Impl::CPtr CPtr;
+
+public:
+  Branches(const uint64_t &default_minfreespace_)
+    : _impl(std::make_shared<Impl>(default_minfreespace_))
+  {}
+
+public:
+  int from_string(const std::string &str) final;
+  std::string to_string(void) const final;
+
+public:
+  operator CPtr()   const { std::lock_guard<std::mutex> lg(_mutex); return _impl; }
+  CPtr operator->() const { std::lock_guard<std::mutex> lg(_mutex); return _impl; }
+
+private:
+  mutable std::mutex _mutex;
+  Ptr                _impl;
+};
+
+class SrcMounts : public ToFromString
+{
+public:
+  SrcMounts(Branches &b_);
+
+public:
+  int from_string(const std::string &str) final;
+  std::string to_string(void) const final;
+
+private:
+  Branches &_branches;
+};

src/category.cpp

@@ -0,0 +1,49 @@
+/*
+  ISC License
+
+  Copyright (c) 2020, 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 "category.hpp"
+#include "errno.hpp"
+#include "str.hpp"
+
+#include <string>
+
+int
+Category::Base::from_string(const std::string &s_)
+{
+  int rv;
+
+  for(auto func : funcs)
+    {
+      rv = func->from_string(s_);
+      if(rv < 0)
+        return rv;
+    }
+
+  return 0;
+}
+
+std::string
+Category::Base::to_string(void) const
+{
+  std::set<std::string> rv;
+
+  for(auto func : funcs)
+    rv.insert(func->to_string());
+
+  return str::join(rv,',');
+}

src/category.hpp

@@ -1,5 +1,5 @@
 /*
-  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+  Copyright (c) 2020, 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
@@ -16,9 +16,92 @@
 
 #pragma once
 
-enum class Category
+#include "tofrom_string.hpp"
+#include "funcs.hpp"
+#include "func.hpp"
+
+#include <string>
+
+namespace Category
+{
+  class Base : public ToFromString
+  {
+  public:
+    int from_string(const std::string &s) final;
+    std::string to_string() const final;
+
+  protected:
+    std::vector<ToFromString*> funcs;
+  };
+
+  class Action final : public Base
+  {
+  private:
+    Action();
+
+  public:
+    Action(Funcs &funcs_)
+    {
+      funcs.push_back(&funcs_.chmod);
+      funcs.push_back(&funcs_.chown);
+      funcs.push_back(&funcs_.link);
+      funcs.push_back(&funcs_.removexattr);
+      funcs.push_back(&funcs_.rename);
+      funcs.push_back(&funcs_.rmdir);
+      funcs.push_back(&funcs_.setxattr);
+      funcs.push_back(&funcs_.truncate);
+      funcs.push_back(&funcs_.unlink);
+      funcs.push_back(&funcs_.utimens);
+    }
+  };
+
+  class Create final : public Base
   {
-    ACTION,
-    CREATE,
-    SEARCH
+  private:
+    Create();
+
+  public:
+    Create(Funcs &funcs_)
+    {
+      funcs.push_back(&funcs_.create);
+      funcs.push_back(&funcs_.mkdir);
+      funcs.push_back(&funcs_.mknod);
+      funcs.push_back(&funcs_.symlink);
+    }
+  };
+
+  class Search final : public Base
+  {
+  private:
+    Search();
+
+  public:
+    Search(Funcs &funcs_)
+    {
+      funcs.push_back(&funcs_.access);
+      funcs.push_back(&funcs_.getattr);
+      funcs.push_back(&funcs_.getxattr);
+      funcs.push_back(&funcs_.listxattr);
+      funcs.push_back(&funcs_.open);
+      funcs.push_back(&funcs_.readlink);
+    }
+  };
+}
+
+class Categories final
+{
+private:
+  Categories();
+
+public:
+  Categories(Funcs &funcs_)
+    : action(funcs_),
+      create(funcs_),
+      search(funcs_)
+  {}
+
+public:
+  Category::Action action;
+  Category::Create create;
+  Category::Search search;
 };

src/config.cpp

@@ -20,14 +20,18 @@
 #include "from_string.hpp"
 #include "num.hpp"
 #include "rwlock.hpp"
+#include "str.hpp"
 #include "to_string.hpp"
 #include "version.hpp"
 
 #include <algorithm>
-#include <string>
+#include <cstdint>
+#include <fstream>
 #include <iostream>
+#include <string>
 
-#include <stdint.h>
+#include <pthread.h>
+#include <string.h>
 #include <sys/stat.h>
 #include <unistd.h>
 
@@ -37,6 +41,11 @@ using std::string;
 
 #define IFERT(S) if(S == s_) return true
 
+const std::string CONTROLFILE = "/.mergerfs";
+
+Config Config::_singleton;
+
+
 namespace l
 {
   static
@@ -60,12 +69,7 @@ namespace l
 }
 
 Config::Config()
-  :
-  open_cache(),
-
-  controlfile("/.mergerfs"),
-
-  async_read(true),
+  : async_read(true),
     auto_cache(false),
     branches(minfreespace),
     cache_attr(1),
@@ -166,17 +170,22 @@ Config::Config()
   _map["xattr"]                = &xattr;
 }
 
-const
 Config&
-Config::ro(void)
+Config::operator=(const Config &cfg_)
 {
-  return *((Config*)fuse_get_context()->private_data);
-}
+  int rv;
+  std::string val;
 
-Config&
-Config::rw(void)
+  for(auto &kv : _map)
     {
-  return *((Config*)fuse_get_context()->private_data);
+      rv = cfg_.get(kv.first,&val);
+      if(rv)
+        continue;
+
+      kv.second->from_string(val);
+    }
+
+  return *this;
 }
 
 bool
@@ -254,11 +263,80 @@ Config::set(const std::string &key_,
             const std::string &value_)
 {
   if(l::readonly(key_))
-    return -EINVAL;
+    return -EROFS;
 
   return set_raw(key_,value_);
 }
 
+int
+Config::set(const std::string &kv_)
+{
+  std::string key;
+  std::string val;
+
+  str::splitkv(kv_,'=',&key,&val);
+  key = str::trim(key);
+  val = str::trim(val);
+
+  return set(key,val);
+}
+
+int
+Config::from_stream(std::istream &istrm_,
+                    ErrVec       *errs_)
+{
+  int rv;
+  std::string line;
+  std::string key;
+  std::string val;
+  Config newcfg;
+
+  newcfg = *this;
+
+  while(std::getline(istrm_,line,'\n'))
+    {
+      line = str::trim(line);
+      if(!line.empty() && (line[0] == '#'))
+        continue;
+
+      str::splitkv(line,'=',&key,&val);
+      key = str::trim(key);
+      val = str::trim(val);
+
+      rv = newcfg.set(key,val);
+      if(rv < 0)
+        errs_->push_back({rv,key});
+    }
+
+  if(!errs_->empty())
+    return -EINVAL;
+
+  *this = newcfg;
+
+  return 0;
+}
+
+int
+Config::from_file(const std::string &filepath_,
+                  ErrVec            *errs_)
+{
+  int rv;
+  std::ifstream ifstrm;
+
+  ifstrm.open(filepath_);
+  if(!ifstrm.good())
+    {
+      errs_->push_back({-errno,filepath_});
+      return -errno;
+    }
+
+  rv = from_stream(ifstrm,errs_);
+
+  ifstrm.close();
+
+  return rv;
+}
+
 std::ostream&
 operator<<(std::ostream &os_,
            const Config &c_)
@@ -268,7 +346,47 @@ operator<<(std::ostream &os_,
 
   for(i = c_._map.begin(), ei = c_._map.end(); i != ei; ++i)
     {
-      os_ << i->first << '=' << i->second << '\n';
+      os_ << i->first << '=' << i->second->to_string() << std::endl;
+    }
+
+  return os_;
+}
+
+
+static
+std::string
+err2str(const int err_)
+{
+  switch(err_)
+    {
+    case 0:
+      return std::string();
+    case -EINVAL:
+      return "invalid value";
+    case -ENOATTR:
+      return "unknown option";
+    case -EROFS:
+      return "read-only option";
+    default:
+      return strerror(-err_);
+    }
+
+  return std::string();
+}
+
+std::ostream&
+operator<<(std::ostream         &os_,
+           const Config::ErrVec &ev_)
+{
+  std::string errstr;
+
+  for(auto &err : ev_)
+    {
+      os_ << "* ERROR: ";
+      errstr = err2str(err.err);
+      if(!errstr.empty())
+        os_ << errstr << " - ";
+      os_ << err.str << std::endl;
     }
 
   return os_;

src/config.hpp

@@ -16,7 +16,8 @@
 
 #pragma once
 
-#include "branch.hpp"
+#include "branches.hpp"
+#include "category.hpp"
 #include "config_cachefiles.hpp"
 #include "config_inodecalc.hpp"
 #include "config_moveonenospc.hpp"
@@ -27,18 +28,20 @@
 #include "config_xattr.hpp"
 #include "enum.hpp"
 #include "errno.hpp"
-#include "func_category.hpp"
 #include "funcs.hpp"
 #include "policy.hpp"
-#include "policy_cache.hpp"
+#include "rwlock.hpp"
 #include "tofrom_wrapper.hpp"
 
-#include <fuse.h>
+#include "fuse.h"
 
+#include <cstdint>
+#include <map>
+#include <memory>
+#include <mutex>
 #include <string>
 #include <vector>
 
-#include <stdint.h>
 #include <sys/stat.h>
 
 typedef ToFromWrapper<bool>                 ConfigBOOL;
@@ -47,16 +50,50 @@ typedef ToFromWrapper<int>                  ConfigINT;
 typedef ToFromWrapper<std::string>          ConfigSTR;
 typedef std::map<std::string,ToFromString*> Str2TFStrMap;
 
+extern const std::string CONTROLFILE;
+
 class Config
 {
 public:
-  Config();
+  struct Err
+  {
+    int err;
+    std::string str;
+  };
+
+  typedef std::vector<Err> ErrVec;
+
+public:
+  class Read
+  {
+  public:
+    Read();
+
+  public:
+    inline const Config* operator->() const;
 
+  private:
+    const Config &_cfg;
+  };
+
+public:
+  class Write
+  {
   public:
-  mutable PolicyCache open_cache;
+    Write();
 
   public:
-  const std::string controlfile;
+    Config* operator->();
+
+  private:
+    Config &_cfg;
+  };
+
+public:
+  Config();
+
+public:
+  Config& operator=(const Config&);
 
 public:
   ConfigBOOL     async_read;
@@ -69,7 +106,7 @@ public:
   ConfigBOOL     cache_readdir;
   ConfigUINT64   cache_statfs;
   ConfigBOOL     cache_symlinks;
-  FuncCategories category;
+  Categories     category;
   ConfigBOOL     direct_io;
   ConfigBOOL     dropcacheonclose;
   ConfigSTR      fsname;
@@ -112,11 +149,50 @@ public:
   int get(const std::string &key, std::string *val) const;
   int set_raw(const std::string &key, const std::string &val);
   int set(const std::string &key, const std::string &val);
+  int set(const std::string &kv);
 
 public:
-  static const Config &ro(void);
-  static Config       &rw(void);
+  int from_stream(std::istream &istrm, ErrVec *errs);
+  int from_file(const std::string &filepath, ErrVec *errs);
 
 private:
   Str2TFStrMap _map;
+
+private:
+  static Config _singleton;
+
+public:
+  friend class Read;
+  friend class Write;
 };
+
+std::ostream& operator<<(std::ostream &s,const Config::ErrVec &ev);
+
+inline
+Config::Read::Read()
+  : _cfg(Config::_singleton)
+{
+
+}
+
+inline
+const
+Config*
+Config::Read::operator->() const
+{
+  return &_cfg;
+}
+
+inline
+Config::Write::Write()
+  : _cfg(Config::_singleton)
+{
+
+}
+
+inline
+Config*
+Config::Write::operator->()
+{
+  return &_cfg;
+}

src/config_cachefiles.hpp

@@ -20,6 +20,7 @@
 
 #include "enum.hpp"
 
+
 enum class CacheFilesEnum
   {
     LIBFUSE,

src/config_inodecalc.cpp

@@ -19,6 +19,7 @@
 #include "config_inodecalc.hpp"
 #include "fs_inode.hpp"
 
+
 InodeCalc::InodeCalc(const std::string &s_)
 {
   fs::inode::set_algo(s_);

src/config_inodecalc.hpp

@@ -20,12 +20,13 @@
 
 #include "tofrom_string.hpp"
 
+
 class InodeCalc : public ToFromString
 {
 public:
   InodeCalc(const std::string &);
 
 public:
-  std::string to_string(void) const;
-  int from_string(const std::string &);
+  std::string to_string(void) const final;
+  int from_string(const std::string &) final;
 };

src/config_moveonenospc.cpp

@@ -21,12 +21,13 @@
 #include "errno.hpp"
 #include "from_string.hpp"
 
+
 int
 MoveOnENOSPC::from_string(const std::string &s_)
 {
   int rv;
   std::string s;
-  const Policy *tmp;
+  Policy::CreateImpl *tmp;
 
   rv = str::from(s_,&enabled);
   if((rv == 0) && (enabled == true))
@@ -36,8 +37,8 @@ MoveOnENOSPC::from_string(const std::string &s_)
   else
     return 0;
 
-  tmp = &Policy::find(s);
-  if(tmp == Policy::invalid)
+  tmp = Policies::Create::find(s);
+  if(tmp == NULL)
     return -EINVAL;
 
   policy  = tmp;
@@ -50,6 +51,6 @@ std::string
 MoveOnENOSPC::to_string(void) const
 {
   if(enabled)
-    return policy->to_string();
+    return policy.name();
   return "false";
 }

src/config_moveonenospc.hpp

@@ -19,26 +19,26 @@
 #pragma once
 
 #include "policy.hpp"
+#include "policies.hpp"
 #include "tofrom_string.hpp"
 
 #include <string>
 
+
 class MoveOnENOSPC : public ToFromString
 {
 public:
   MoveOnENOSPC(const bool enabled_)
-    : enabled(enabled_)
+    : enabled(enabled_),
+      policy(&Policies::Create::mfs)
   {
-    policy = (enabled ?
-              &Policy::mfs :
-              &Policy::invalid);
   }
 
 public:
-  int from_string(const std::string &s);
-  std::string to_string() const;
+  int from_string(const std::string &s) final;
+  std::string to_string() const final;
 
 public:
   bool enabled;
-  const Policy *policy;
+  Policy::Create policy;
 };

src/config_nfsopenhack.cpp

@@ -20,6 +20,7 @@
 #include "ef.hpp"
 #include "errno.hpp"
 
+
 template<>
 int
 NFSOpenHack::from_string(const std::string &s_)

src/config_nfsopenhack.hpp

@@ -20,6 +20,7 @@
 
 #include "enum.hpp"
 
+
 enum class NFSOpenHackEnum
   {
     OFF,

src/config_readdir.cpp

@@ -20,6 +20,7 @@
 #include "ef.hpp"
 #include "errno.hpp"
 
+
 template<>
 int
 ReadDir::from_string(const std::string &s_)

src/config_readdir.hpp

@@ -20,6 +20,7 @@
 
 #include "enum.hpp"
 
+
 enum class ReadDirEnum
   {
     POSIX,

src/config_statfs.cpp

@@ -20,6 +20,7 @@
 #include "ef.hpp"
 #include "errno.hpp"
 
+
 template<>
 std::string
 StatFS::to_string() const

src/config_statfs.hpp

@@ -20,6 +20,7 @@
 
 #include "enum.hpp"
 
+
 enum class StatFSEnum
   {
     BASE,

src/config_statfsignore.cpp

@@ -20,6 +20,7 @@
 #include "ef.hpp"
 #include "errno.hpp"
 
+
 template<>
 std::string
 StatFSIgnore::to_string() const

src/config_xattr.cpp

@@ -20,6 +20,7 @@
 #include "ef.hpp"
 #include "errno.hpp"
 
+
 template<>
 std::string
 XAttr::to_string() const

src/config_xattr.hpp

@@ -21,6 +21,7 @@
 #include "enum.hpp"
 #include "errno.hpp"
 
+
 enum class XAttrEnum
   {
     PASSTHROUGH = 0,

src/dirinfo.hpp

@@ -20,6 +20,7 @@
 
 #include <string>
 
+
 class DirInfo : public FH
 {
 public:

src/endian.hpp

@@ -18,6 +18,7 @@
 
 #pragma once
 
+
 namespace endian
 {
   static

src/enum.hpp

@@ -22,6 +22,7 @@
 
 #include <string>
 
+
 template<typename E>
 class Enum : public ToFromString
 {

src/fh.hpp

@@ -18,6 +18,7 @@
 
 #include <string>
 
+
 class FH
 {
 public:

src/fileinfo.hpp

@@ -20,6 +20,7 @@
 
 #include <string>
 
+
 class FileInfo : public FH
 {
 public:

src/fixed_mem_pool.hpp

@@ -18,8 +18,10 @@
 
 #pragma once
 
+#include <cstdint>
+
 #include <stdlib.h>
-#include <stdint.h>
+
 
 typedef struct fixed_mem_pool_t fixed_mem_pool_t;
 struct fixed_mem_pool_t

src/from_string.cpp

@@ -17,13 +17,14 @@
 */
 
 #include "ef.hpp"
+#include "errno.hpp"
 
+#include <cstdint>
 #include <string>
 
-#include <errno.h>
-#include <stdint.h>
 #include <stdlib.h>
 
+
 namespace str
 {
   int
@@ -50,7 +51,17 @@ namespace str
   from(const std::string &value_,
        int               *int_)
   {
-    *int_ = ::strtol(value_.c_str(),NULL,10);
+    int tmp;
+    char *endptr;
+
+    errno = 0;
+    tmp = ::strtol(value_.c_str(),&endptr,10);
+    if(errno != 0)
+      return -EINVAL;
+    if(endptr == value_.c_str())
+      return -EINVAL;
+
+    *int_ = tmp;
 
     return 0;
   }

src/from_string.hpp

@@ -18,9 +18,9 @@
 
 #pragma once
 
+#include <cstdint>
 #include <string>
 
-#include <stdint.h>
 
 namespace str
 {

src/fs_acl.cpp

@@ -23,6 +23,7 @@
 
 const char POSIX_ACL_DEFAULT_XATTR[] = "system.posix_acl_default";
 
+
 namespace fs
 {
   namespace acl

src/fs_acl.hpp

@@ -20,6 +20,7 @@
 
 #include <string>
 
+
 namespace fs
 {
   namespace acl

src/fs_attr.hpp

@@ -18,6 +18,7 @@
 
 #include <string>
 
+
 namespace fs
 {
   namespace attr

src/fs_attr_linux.icpp

@@ -26,6 +26,7 @@
 
 using std::string;
 
+
 namespace fs
 {
   namespace attr

src/fs_attr_unsupported.icpp

@@ -18,6 +18,7 @@
 
 #include <string>
 
+
 namespace fs
 {
   namespace attr

src/fs_clonefile.cpp

@@ -22,6 +22,7 @@
 #include "fs_fchmod.hpp"
 #include "fs_futimens.hpp"
 
+
 namespace l
 {
   static

src/fs_clonefile.hpp

@@ -16,6 +16,7 @@
 
 #pragma once
 
+
 namespace fs
 {
   int

src/fs_clonepath.cpp

@@ -14,8 +14,6 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
-#include <string>
-
 #include "errno.h"
 #include "fs_attr.hpp"
 #include "fs_clonepath.hpp"
@@ -27,8 +25,11 @@
 #include "fs_xattr.hpp"
 #include "ugid.hpp"
 
+#include <string>
+
 using std::string;
 
+
 namespace l
 {
   static

src/fs_clonepath.hpp

@@ -18,6 +18,7 @@
 
 #include <string>
 
+
 namespace fs
 {
   int clonepath(const std::string &from,

src/fs_close.hpp

@@ -20,6 +20,7 @@
 
 #include <unistd.h>
 
+
 namespace fs
 {
   static

src/fs_closedir.hpp

@@ -21,6 +21,7 @@
 #include <dirent.h>
 #include <sys/types.h>
 
+
 namespace fs
 {
   static

src/fs_copy_file_range.hpp

@@ -18,10 +18,12 @@
 
 #pragma once
 
+#include <cstdint>
+
 #include <stddef.h>
-#include <stdint.h>
 #include <sys/types.h>
 
+
 namespace fs
 {
   int64_t

src/fs_copy_file_range_linux.icpp

@@ -22,13 +22,15 @@
 
 #include "errno.hpp"
 
+#include <cstdint>
+
 #include <fcntl.h>
-#include <stdint.h>
 #include <stdio.h>
 #include <sys/syscall.h>
 #include <sys/types.h>
 #include <unistd.h>
 
+
 namespace l
 {
   static

src/fs_copy_file_range_unsupported.icpp

@@ -18,10 +18,12 @@
 
 #include "errno.h"
 
+#include <cstdint>
+
 #include <stddef.h>
-#include <stdint.h>
 #include <sys/types.h>
 
+
 namespace fs
 {
   ssize_t

src/fs_copydata.cpp

@@ -24,6 +24,7 @@
 
 #include <stddef.h>
 
+
 namespace fs
 {
   int

src/fs_copydata.hpp

@@ -20,6 +20,7 @@
 
 #include <stddef.h>
 
+
 namespace fs
 {
   int

src/fs_copydata_copy_file_range.cpp

@@ -18,7 +18,8 @@
 #include "fs_copy_file_range.hpp"
 #include "fs_fstat.hpp"
 
-#include <stdint.h>
+#include <cstdint>
+
 
 namespace l
 {

src/fs_copydata_copy_file_range.hpp

@@ -16,7 +16,8 @@
 
 #pragma once
 
-#include <stdint.h>
+#include <cstdint>
+
 
 namespace fs
 {

src/fs_copydata_readwrite.cpp

@@ -24,6 +24,7 @@
 
 using std::vector;
 
+
 namespace l
 {
   static

src/fs_copydata_readwrite.hpp

@@ -16,6 +16,7 @@
 
 #pragma once
 
+
 namespace fs
 {
   int

src/fs_cow.cpp

@@ -34,6 +34,7 @@
 
 using std::string;
 
+
 namespace l
 {
   static

src/fs_cow.hpp

@@ -21,6 +21,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 
+
 namespace fs
 {
   namespace cow

src/fs_devid.hpp

@@ -20,6 +20,7 @@
 
 #include "fs_fstat.hpp"
 
+
 namespace fs
 {
   static

src/fs_dirfd.hpp

@@ -21,6 +21,7 @@
 #include <dirent.h>
 #include <sys/types.h>
 
+
 namespace fs
 {
   static

src/fs_dup.hpp

@@ -20,6 +20,7 @@
 
 #include <unistd.h>
 
+
 namespace fs
 {
   static

src/fs_eaccess.hpp

@@ -20,6 +20,7 @@
 
 #include "fs_faccessat.hpp"
 
+
 namespace fs
 {
   static

src/fs_exists.hpp

@@ -23,6 +23,7 @@
 
 #include <string>
 
+
 namespace fs
 {
   static

src/fs_faccessat.hpp

@@ -23,6 +23,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 
+
 namespace fs
 {
   static

src/fs_fadvise.hpp

@@ -18,6 +18,7 @@
 
 #include <sys/types.h>
 
+
 namespace fs
 {
   int

src/fs_fadvise_posix.icpp

@@ -16,6 +16,7 @@
 
 #include <fcntl.h>
 
+
 namespace fs
 {
   static

src/fs_fadvise_unsupported.icpp

@@ -16,6 +16,7 @@
 
 #include "errno.hpp"
 
+
 namespace fs
 {
   static

src/fs_fallocate.hpp

@@ -18,6 +18,7 @@
 
 #include <fcntl.h>
 
+
 namespace fs
 {
   int

src/fs_fallocate_linux.icpp

@@ -16,6 +16,7 @@
 
 #include <fcntl.h>
 
+
 namespace fs
 {
   int

src/fs_fallocate_osx.icpp

@@ -14,10 +14,11 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
+#include "errno.hpp"
+
 #include <fcntl.h>
 #include <unistd.h>
 
-#include "errno.hpp"
 
 namespace l
 {

src/fs_fallocate_posix.icpp

@@ -18,6 +18,7 @@
 
 #include <fcntl.h>
 
+
 namespace fs
 {
   int

src/fs_fallocate_unsupported.icpp

@@ -16,6 +16,7 @@
 
 #include "errno.hpp"
 
+
 namespace fs
 {
   int

src/fs_fchmod.hpp

@@ -24,6 +24,7 @@
 
 #define MODE_BITS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)
 
+
 namespace fs
 {
   static

src/fs_fchmodat.hpp

@@ -23,6 +23,7 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 
+
 namespace fs
 {
   static

src/fs_fchown.hpp

@@ -25,6 +25,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+
 namespace fs
 {
   static

src/fs_fdatasync.hpp

@@ -26,6 +26,7 @@
 
 #include <unistd.h>
 
+
 namespace fs
 {
   static

src/fs_fgetxattr.hpp

@@ -25,6 +25,7 @@
 
 #include <sys/types.h>
 
+
 namespace fs
 {
   static

src/fs_ficlone.hpp

@@ -18,6 +18,7 @@
 
 #pragma once
 
+
 namespace fs
 {
   int

src/fs_ficlone_linux.icpp

@@ -21,6 +21,7 @@
 
 #include <linux/fs.h>
 
+
 namespace fs
 {
   int

src/fs_ficlone_unsupported.icpp

@@ -18,6 +18,7 @@
 
 #include "errno.hpp"
 
+
 namespace fs
 {
   int

src/fs_file_size.cpp

@@ -18,7 +18,8 @@
 
 #include "fs_fstat.hpp"
 
-#include <stdint.h>
+#include <cstdint>
+
 
 namespace fs
 {

src/fs_file_size.hpp

@@ -18,7 +18,8 @@
 
 #pragma once
 
-#include <stdint.h>
+#include <cstdint>
+
 
 namespace fs
 {

src/fs_findallfiles.cpp

@@ -22,6 +22,7 @@
 #include <string>
 #include <vector>
 
+
 namespace fs
 {
   void

src/fs_findallfiles.hpp

@@ -18,13 +18,16 @@
 
 #pragma once
 
+#include "strvec.hpp"
+
 #include <string>
 #include <vector>
 
+
 namespace fs
 {
   void
-  findallfiles(const std::vector<std::string> &basepaths,
+  findallfiles(const StrVec &basepaths,
                const char   *fusepath,
-               std::vector<std::string>       *paths);
+               StrVec       *paths);
 }

src/fs_findonfs.cpp

@@ -16,7 +16,7 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
-#include "branch.hpp"
+#include "branches.hpp"
 #include "errno.hpp"
 #include "fs_fstat.hpp"
 #include "fs_lstat.hpp"
@@ -24,11 +24,12 @@
 
 #include <string>
 
+
 namespace l
 {
   static
   int
-  findonfs(const BranchVec   &branches_,
+  findonfs(const Branches::CPtr &branches_,
            const std::string    &fusepath_,
            const int             fd_,
            std::string          *basepath_)
@@ -37,18 +38,15 @@ namespace l
     dev_t dev;
     struct stat st;
     std::string fullpath;
-    const Branch *branch;
 
     rv = fs::fstat(fd_,&st);
     if(rv == -1)
       return -1;
 
     dev = st.st_dev;
-    for(size_t i = 0, ei = branches_.size(); i != ei; i++)
+    for(const auto &branch : *branches_)
       {
-        branch = &branches_[i];
-
-        fullpath = fs::path::make(branch->path,fusepath_);
+        fullpath = fs::path::make(branch.path,fusepath_);
 
         rv = fs::lstat(fullpath,&st);
         if(rv == -1)
@@ -57,7 +55,7 @@ namespace l
         if(st.st_dev != dev)
           continue;
 
-        *basepath_ = branch->path;
+        *basepath_ = branch.path;
 
         return 0;
       }
@@ -69,13 +67,11 @@ namespace l
 namespace fs
 {
   int
-  findonfs(const Branches    &branches_,
+  findonfs(const Branches::CPtr &branches_,
            const std::string    &fusepath_,
            const int             fd_,
            std::string          *basepath_)
   {
-    rwlock::ReadGuard guard(branches_.lock);
-
-    return l::findonfs(branches_.vec,fusepath_,fd_,basepath_);
+    return l::findonfs(branches_,fusepath_,fd_,basepath_);
   }
 }

src/fs_findonfs.hpp

@@ -18,14 +18,15 @@
 
 #pragma once
 
-#include "branch.hpp"
+#include "branches.hpp"
 
 #include <string>
 
+
 namespace fs
 {
   int
-  findonfs(const Branches    &branches,
+  findonfs(const Branches::CPtr &branches,
            const std::string    &fusepath,
            const int             fd,
            std::string          *basepath);

src/fs_flistxattr.hpp

@@ -23,6 +23,7 @@
 
 #include <sys/types.h>
 
+
 namespace fs
 {
   static

src/fs_flock.hpp

@@ -20,6 +20,7 @@
 
 #include <sys/file.h>
 
+
 namespace fs
 {
   static

src/fs_fsetxattr.hpp

@@ -25,6 +25,7 @@
 
 #include <sys/types.h>
 
+
 namespace fs
 {
   static

src/fs_fstat.hpp

@@ -23,6 +23,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+
 namespace fs
 {
   static

src/fs_fstatat.hpp

@@ -23,6 +23,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 
+
 namespace fs
 {
   static

src/fs_fsync.hpp

@@ -20,6 +20,7 @@
 
 #include <unistd.h>
 
+
 namespace fs
 {
   static

src/fs_ftruncate.hpp

@@ -21,6 +21,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+
 namespace fs
 {
   static

src/fs_futimens.hpp

@@ -33,6 +33,7 @@
 #include "fs_futimens_generic.hpp"
 #endif
 
+
 namespace fs
 {
   static

src/fs_futimens_freebsd_11.hpp

@@ -20,6 +20,7 @@
 
 #include <sys/stat.h>
 
+
 namespace fs
 {
   static

src/fs_futimens_generic.hpp

@@ -33,6 +33,7 @@
 # define UTIME_OMIT ((1l << 30) - 2l)
 #endif
 
+
 namespace l
 {
   static

src/fs_futimens_linux.hpp

@@ -20,6 +20,7 @@
 
 #include <sys/stat.h>
 
+
 namespace fs
 {
   static

src/fs_futimesat.hpp

@@ -20,6 +20,7 @@
 
 #include <sys/time.h>
 
+
 namespace fs
 {
   int

src/fs_futimesat_generic.icpp

@@ -19,6 +19,7 @@
 #include <fcntl.h>
 #include <sys/time.h>
 
+
 namespace fs
 {
   int

src/fs_futimesat_osx.icpp

@@ -26,6 +26,7 @@
 #include <sys/time.h>
 #include <unistd.h>
 
+
 namespace l
 {
   static

src/fs_getdents64.cpp

@@ -23,6 +23,7 @@
 #include <sys/syscall.h>
 #endif
 
+
 namespace fs
 {
   int

src/fs_getdents64.hpp

@@ -18,6 +18,7 @@
 
 #pragma once
 
+
 namespace fs
 {
   int

src/fs_getfl.cpp

@@ -18,6 +18,7 @@
 
 #include <fcntl.h>
 
+
 namespace fs
 {
   int

src/fs_getfl.hpp

@@ -18,6 +18,7 @@
 
 #pragma once
 
+
 namespace fs
 {
   int getfl(const int fd);