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Add getdents based readdir functions for Linux (#1533)
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trapexit 2025-09-24 00:51:21 -04:00 • committed by GitHub
parent 95ab37fdd2
commit 2f3e807e9d
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33 changed files with 886 additions and 904 deletions
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92
src/fuse_readdir_seq.cpp
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@ -18,99 +18,19 @@
#include "fuse_readdir_seq.hpp"
#include "error.hpp"
#include "branches.hpp"
#include "config.hpp"
#include "dirinfo.hpp"
#include "errno.hpp"
#include "fs_closedir.hpp"
#include "fs_dirfd.hpp"
#include "fs_inode.hpp"
#include "fs_opendir.hpp"
#include "fs_path.hpp"
#include "fs_readdir.hpp"
#include "fs_stat.hpp"
#include "hashset.hpp"
#include "scope_guard.hpp"
#include "supported_getdents64.hpp"
#include "ugid.hpp"
#include "fuse.h"
#include "fuse_dirents.h"
#include <string>
static
uint64_t
_dirent_exact_namelen(const struct dirent *d_)
{
#ifdef _D_EXACT_NAMLEN
return _D_EXACT_NAMLEN(d_);
#elif defined _DIRENT_HAVE_D_NAMLEN
return d_->d_namlen;
#ifdef MERGERFS_SUPPORTED_GETDENTS64
#include "fuse_readdir_seq_getdents.icpp"
#else
return strlen(d_->d_name);
#include "fuse_readdir_seq_readdir.icpp"
#endif
}
static
int
_readdir(const Branches::Ptr &branches_,
const fs::path &rel_dirpath_,
fuse_dirents_t *buf_)
{
Err err;
HashSet names;
fs::path rel_filepath;
fs::path abs_dirpath;
fuse_dirents_reset(buf_);
rel_filepath = rel_dirpath_ / "dummy";
for(const auto &branch : *branches_)
{
int rv;
DIR *dh;
abs_dirpath = branch.path / rel_dirpath_;
errno = 0;
dh = fs::opendir(abs_dirpath);
err = -errno;
if(!dh)
continue;
DEFER{ fs::closedir(dh); };
rv = 0;
for(dirent *de = fs::readdir(dh); de; de = fs::readdir(dh))
{
std::uint64_t namelen;
namelen = ::_dirent_exact_namelen(de);
rv = names.put(de->d_name,namelen);
if(rv == 0)
continue;
rel_filepath.replace_filename(de->d_name);
de->d_ino = fs::inode::calc(branch.path,
rel_filepath,
DTTOIF(de->d_type),
de->d_ino);
rv = fuse_dirents_add(buf_,de,namelen);
if(rv)
return -ENOMEM;
}
}
return err;
}
int
FUSE::ReadDirSeq::operator()(fuse_file_info_t const *ffi_,
fuse_dirents_t *buf_)
fuse_dirents_t *dirents_)
{
DirInfo *di = DirInfo::from_fh(ffi_->fh);
const fuse_context *fc = fuse_get_context();
@ -118,5 +38,5 @@ FUSE::ReadDirSeq::operator()(fuse_file_info_t const *ffi_,
return ::_readdir(cfg.branches,
di->fusepath,
buf_);
dirents_);
}