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Add ability to set readahead of mergerfs and branches

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This commit is contained in:
Antonio SJ Musumeci 2023-02-28 23:10:36 -05:00
parent 6e845b337a
commit 486c5d3734
8 changed files with 188 additions and 7 deletions
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51
src/fuse_init.cpp
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@ -16,9 +16,15 @@
#include "config.hpp"
#include "ugid.hpp"
#include "fs_readahead.hpp"
#include "syslog.hpp"
#include "fmt/core.h"
#include "fuse.h"
#include <thread>
namespace l
{
@ -77,6 +83,49 @@ namespace l
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
@ -104,6 +153,8 @@ namespace FUSE
conn_->want &= ~FUSE_CAP_POSIX_LOCKS;
conn_->want &= ~FUSE_CAP_FLOCK_LOCKS;
l::spawn_thread_to_set_readahead();
return NULL;
}
}