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Support Linux v6.13 FUSE max_page_limit

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This commit is contained in:
Antonio SJ Musumeci 2025-03-25 09:47:25 -05:00
parent d31e97e64c
commit 92ae63e842
12 changed files with 221 additions and 24 deletions
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55
src/fuse_init.cpp
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@ -23,7 +23,10 @@
#include "fuse.h"
#include "ghc/filesystem.hpp"
#include <thread>
#include <algorithm>
namespace l
@ -68,15 +71,67 @@ namespace l
*want_ = false;
}
#define MAX_FUSE_MSG_SIZE 65535
static const char MAX_PAGES_LIMIT_FILEPATH[] = "/proc/sys/fs/fuse/max_pages_limit";
static
void
want_if_capable_max_pages(fuse_conn_info *conn_,
Config::Write &cfg_)
{
std::fstream f;
uint64_t max_pages_limit;
if(ghc::filesystem::exists(MAX_PAGES_LIMIT_FILEPATH))
{
if(cfg_->fuse_msg_size > MAX_FUSE_MSG_SIZE)
syslog_info("fuse_msg_size > %u: setting it to %u",
MAX_FUSE_MSG_SIZE,
MAX_FUSE_MSG_SIZE);
cfg_->fuse_msg_size = std::min((uint64_t)cfg_->fuse_msg_size,
(uint64_t)MAX_FUSE_MSG_SIZE);
f.open(MAX_PAGES_LIMIT_FILEPATH,f.in|f.out);
if(f.is_open())
{
f >> max_pages_limit;
syslog_info("%s currently set to %u",
MAX_PAGES_LIMIT_FILEPATH,
(uint64_t)max_pages_limit);
if(cfg_->fuse_msg_size > max_pages_limit)
{
f.seekp(0);
f << (uint64_t)cfg_->fuse_msg_size;
f.flush();
syslog_info("%s changed to %u",
MAX_PAGES_LIMIT_FILEPATH,
(uint64_t)cfg_->fuse_msg_size);
}
f.close();
}
else
{
if(cfg_->fuse_msg_size != FUSE_DEFAULT_MAX_MAX_PAGES)
syslog_info("unable to open %s",MAX_PAGES_LIMIT_FILEPATH);
}
}
else
{
if(cfg_->fuse_msg_size > FUSE_DEFAULT_MAX_MAX_PAGES)
syslog_info("fuse_msg_size request %u > %u: setting it to %u",
(uint64_t)cfg_->fuse_msg_size,
FUSE_DEFAULT_MAX_MAX_PAGES,
FUSE_DEFAULT_MAX_MAX_PAGES);
cfg_->fuse_msg_size = std::min((uint64_t)cfg_->fuse_msg_size,
(uint64_t)FUSE_DEFAULT_MAX_MAX_PAGES);
}
if(l::capable(conn_,FUSE_CAP_MAX_PAGES))
{
l::want(conn_,FUSE_CAP_MAX_PAGES);
conn_->max_pages = cfg_->fuse_msg_size;
syslog_info("requesting max pages size of %u",
(uint64_t)cfg_->fuse_msg_size);
}
else
{