mirror of
https://github.com/trapexit/mergerfs.git
synced 2026-10-26 02:48:59 -04:00
b18aba86b6
* Remove python dependency * Remove ecfd * Improve makefiles * Make preload.so more 32bit compatible
153 lines
3.4 KiB
C++
153 lines
3.4 KiB
C++
/*
|
|
Copyright (c) 2018, 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 "fuse_listxattr.hpp"
|
|
|
|
#include "config.hpp"
|
|
#include "errno.hpp"
|
|
#include "fs_llistxattr.hpp"
|
|
#include "ugid.hpp"
|
|
#include "xattr.hpp"
|
|
|
|
#include "fuse.h"
|
|
|
|
#include <optional>
|
|
#include <string>
|
|
|
|
#include <cstring>
|
|
|
|
static
|
|
ssize_t
|
|
_listxattr_size(const std::vector<Branch*> &branches_,
|
|
const char *fusepath_)
|
|
{
|
|
ssize_t size;
|
|
std::string fullpath;
|
|
|
|
if(branches_.empty())
|
|
return -ENOENT;
|
|
|
|
size = 0;
|
|
for(const auto branch : branches_)
|
|
{
|
|
ssize_t rv;
|
|
|
|
fullpath = fs::path::make(branch->path,fusepath_);
|
|
|
|
rv = fs::llistxattr(fullpath,NULL,0);
|
|
if(rv < 0)
|
|
continue;
|
|
|
|
size += rv;
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
static
|
|
ssize_t
|
|
_listxattr(const std::vector<Branch*> &branches_,
|
|
const char *fusepath_,
|
|
char *list_,
|
|
size_t size_)
|
|
{
|
|
ssize_t rv;
|
|
ssize_t size;
|
|
std::string fullpath;
|
|
std::optional<ssize_t> err;
|
|
|
|
if(size_ == 0)
|
|
return ::_listxattr_size(branches_,fusepath_);
|
|
|
|
size = 0;
|
|
err = -ENOENT;
|
|
for(const auto branch : branches_)
|
|
{
|
|
fullpath = fs::path::make(branch->path,fusepath_);
|
|
|
|
rv = fs::llistxattr(fullpath,list_,size_);
|
|
if(rv == -ERANGE)
|
|
return -ERANGE;
|
|
if(rv < 0)
|
|
{
|
|
if(!err.has_value())
|
|
err = rv;
|
|
continue;
|
|
}
|
|
|
|
err = 0;
|
|
list_ += rv;
|
|
size_ -= rv;
|
|
size += rv;
|
|
}
|
|
|
|
if(err < 0)
|
|
return err.value();
|
|
|
|
return size;
|
|
}
|
|
|
|
static
|
|
int
|
|
_listxattr(const Policy::Search &searchFunc_,
|
|
const Branches &ibranches_,
|
|
const char *fusepath_,
|
|
char *list_,
|
|
const size_t size_)
|
|
{
|
|
int rv;
|
|
std::string fullpath;
|
|
std::vector<Branch*> obranches;
|
|
|
|
rv = searchFunc_(ibranches_,fusepath_,obranches);
|
|
if(rv < 0)
|
|
return rv;
|
|
|
|
if(size_ == 0)
|
|
return ::_listxattr_size(obranches,fusepath_);
|
|
|
|
return ::_listxattr(obranches,fusepath_,list_,size_);
|
|
}
|
|
|
|
int
|
|
FUSE::listxattr(const char *fusepath_,
|
|
char *list_,
|
|
size_t size_)
|
|
{
|
|
Config::Read cfg;
|
|
|
|
if(Config::is_ctrl_file(fusepath_))
|
|
return cfg->keys_listxattr(list_,size_);
|
|
|
|
switch(cfg->xattr)
|
|
{
|
|
case XAttr::ENUM::PASSTHROUGH:
|
|
break;
|
|
case XAttr::ENUM::NOATTR:
|
|
return 0;
|
|
case XAttr::ENUM::NOSYS:
|
|
return -ENOSYS;
|
|
}
|
|
|
|
const fuse_context *fc = fuse_get_context();
|
|
const ugid::Set ugid(fc->uid,fc->gid);
|
|
|
|
return ::_listxattr(cfg->func.listxattr.policy,
|
|
cfg->branches,
|
|
fusepath_,
|
|
list_,
|
|
size_);
|
|
}
|