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only allow manipulation of runtime settings via xattrs. closes #22

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This commit is contained in:
Antonio SJ Musumeci 2014-07-29 00:00:42 -04:00
parent 45cec2d301
commit 7b0d703f00
35 changed files with 50 additions and 419 deletions
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80
src/write.cpp
View file

@ -27,80 +27,8 @@
#include <errno.h>
#include <unistd.h>
#include <string>
#include <vector>
#include <sstream>
#include "config.hpp"
#include "policy.hpp"
#include "category.hpp"
#include "ugid.hpp"
#include "fileinfo.hpp"
using mergerfs::config::Config;
using mergerfs::Policy;
using mergerfs::Category;
using std::string;
using std::vector;
using std::stringstream;
static
int
_process_kv(Config &config,
const string key,
const string value)
{
const Category *cat;
const Policy *policy;
cat = Category::find(key);
if(cat == Category::invalid)
return -EINVAL;
policy = Policy::find(value);
if(policy == Policy::invalid)
return -EINVAL;
config.policies[*cat] = policy;
return 0;
}
static
int
_write_controlfile(Config &config,
string &existing,
const string buf,
const off_t _offset)
{
size_t bufsize = buf.size();
size_t existingsize = existing.size();
if((existingsize + buf.size()) > 1024)
return (existing.clear(),-EINVAL);
existing += buf;
size_t nlpos = existing.find_first_of('\n',existingsize);
if(nlpos == string::npos)
return 0;
string line = existing.substr(0,nlpos);
existing = existing.substr(nlpos+1);
size_t equalsoffset = line.find_first_of('=');
if(equalsoffset == string::npos)
return -EINVAL;
int rv;
string key = line.substr(0,equalsoffset);
string value = line.substr(equalsoffset+1);
rv = _process_kv(config,key,value);
return ((rv < 0) ? rv : bufsize);
}
static
int
_write(const int fd,
@ -126,14 +54,6 @@ namespace mergerfs
off_t offset,
struct fuse_file_info *fi)
{
const config::Config &config = config::get();
if(fusepath == config.controlfile)
return _write_controlfile(config::get_writable(),
*(string*)fi->fh,
string(buf,count),
offset);
return _write(((FileInfo*)fi->fh)->fd,
buf,
count,