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/*
Copyright (c) 2016, 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 "config.hpp"
#include "ugid.hpp"
#include "fs_readahead.hpp"
#include "syslog.hpp"
#include "fmt/core.h"
#include "fuse.h"
#include <thread>
namespace l
{
static
void
want(fuse_conn_info *conn_,
const int flag_)
{
conn_->want |= flag_;
}
static
bool
capable(fuse_conn_info *conn_,
const int flag_)
{
return !!(conn_->capable & flag_);
}
static
void
want_if_capable(fuse_conn_info *conn_,
const int flag_)
{
if(capable(conn_,flag_))
want(conn_,flag_);
}
static
void
want_if_capable(fuse_conn_info *conn_,
const int flag_,
ConfigBOOL *want_)
{
if(*want_ && l::capable(conn_,flag_))
{
l::want(conn_,flag_);
return;
}
*want_ = false;
}
static
void
want_if_capable_max_pages(fuse_conn_info *conn_,
Config::Write &cfg_)
{
if(l::capable(conn_,FUSE_CAP_MAX_PAGES))
{
l::want(conn_,FUSE_CAP_MAX_PAGES);
conn_->max_pages = cfg_->fuse_msg_size;
}
else
{
cfg_->fuse_msg_size = FUSE_DEFAULT_MAX_PAGES_PER_REQ;
}
}
static
void
readahead(const std::string path_,
const int readahead_)
{
int rv;
rv = fs::readahead(path_,readahead_);
if(rv == 0)
syslog_info("%s - readahead set to %d",path_.c_str(),readahead_);
else
syslog_error("%s - unable to set readahead",path_.c_str());
}
static
void
set_readahead_on_mount_and_branches()
{
Config::Read cfg;
Branches::CPtr branches;
if((uint64_t)cfg->readahead == 0)
return;
l::readahead(cfg->mountpoint,cfg->readahead);
branches = cfg->branches;
for(auto const &branch : *branches)
l::readahead(branch.path,cfg->readahead);
}
// Spawn a thread to do this because before init returns calls to
// set the value will block leading to a deadlock. This is just
// easier.
static
void
spawn_thread_to_set_readahead()
{
std::thread readahead_thread(l::set_readahead_on_mount_and_branches);
readahead_thread.detach();
}
}
namespace FUSE
{
void *
init(fuse_conn_info *conn_)
{
Config::Write cfg;
ugid::init();
cfg->readdir.initialize();
l::want_if_capable(conn_,FUSE_CAP_ASYNC_DIO);
l::want_if_capable(conn_,FUSE_CAP_ASYNC_READ,&cfg->async_read);
l::want_if_capable(conn_,FUSE_CAP_ATOMIC_O_TRUNC);
l::want_if_capable(conn_,FUSE_CAP_BIG_WRITES);
l::want_if_capable(conn_,FUSE_CAP_CACHE_SYMLINKS,&cfg->cache_symlinks);
l::want_if_capable(conn_,FUSE_CAP_DONT_MASK);
l::want_if_capable(conn_,FUSE_CAP_EXPORT_SUPPORT,&cfg->export_support);
l::want_if_capable(conn_,FUSE_CAP_IOCTL_DIR);
l::want_if_capable(conn_,FUSE_CAP_PARALLEL_DIROPS);
l::want_if_capable(conn_,FUSE_CAP_POSIX_ACL,&cfg->posix_acl);
l::want_if_capable(conn_,FUSE_CAP_READDIR_PLUS,&cfg->readdirplus);
// l::want_if_capable(conn_,FUSE_CAP_READDIR_PLUS_AUTO);
l::want_if_capable(conn_,FUSE_CAP_WRITEBACK_CACHE,&cfg->writeback_cache);
l::want_if_capable_max_pages(conn_,cfg);
conn_->want &= ~FUSE_CAP_POSIX_LOCKS;
conn_->want &= ~FUSE_CAP_FLOCK_LOCKS;
l::spawn_thread_to_set_readahead();
return NULL;
}
}