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Add "per-process" file caching feature

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Allows chosing page caching based on process name.
This commit is contained in:
Antonio SJ Musumeci 2023-02-11 12:11:45 -05:00
parent b51a5970b2
commit 9effeb6869
15 changed files with 363 additions and 55 deletions
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50
src/fuse_create.cpp
View file

@ -21,6 +21,7 @@
#include "fs_clonepath.hpp"
#include "fs_open.hpp"
#include "fs_path.hpp"
#include "procfs_get_name.hpp"
#include "ugid.hpp"
#include "fuse.h"
@ -28,9 +29,6 @@
#include <string>
#include <vector>
using std::string;
using std::vector;
namespace l
{
@ -56,6 +54,7 @@ namespace l
static
void
config_to_ffi_flags(Config::Read &cfg_,
const int tid_,
fuse_file_info_t *ffi_)
{
switch(cfg_->cache_files)
@ -85,15 +84,32 @@ namespace l
ffi_->keep_cache = 0;
ffi_->auto_cache = 1;
break;
case CacheFiles::ENUM::PER_PROCESS:
std::string proc_name;
proc_name = procfs::get_name(tid_);
if(cfg_->cache_files_process_names.count(proc_name) == 0)
{
ffi_->direct_io = 1;
ffi_->keep_cache = 0;
ffi_->auto_cache = 0;
}
else
{
ffi_->direct_io = 0;
ffi_->keep_cache = 0;
ffi_->auto_cache = 0;
}
break;
}
}
static
int
create_core(const string &fullpath_,
mode_t mode_,
const mode_t umask_,
const int flags_)
create_core(const std::string &fullpath_,
mode_t mode_,
const mode_t umask_,
const int flags_)
{
if(!fs::acl::dir_has_defaults(fullpath_))
mode_ &= ~umask_;
@ -103,15 +119,15 @@ namespace l
static
int
create_core(const string &createpath_,
const char *fusepath_,
const mode_t mode_,
const mode_t umask_,
const int flags_,
uint64_t *fh_)
create_core(const std::string &createpath_,
const char *fusepath_,
const mode_t mode_,
const mode_t umask_,
const int flags_,
uint64_t *fh_)
{
int rv;
string fullpath;
std::string fullpath;
fullpath = fs::path::make(createpath_,fusepath_);
@ -136,8 +152,8 @@ namespace l
uint64_t *fh_)
{
int rv;
string fullpath;
string fusedirpath;
std::string fullpath;
std::string fusedirpath;
StrVec createpaths;
StrVec existingpaths;
@ -175,7 +191,7 @@ namespace FUSE
const fuse_context *fc = fuse_get_context();
const ugid::Set ugid(fc->uid,fc->gid);
l::config_to_ffi_flags(cfg,ffi_);
l::config_to_ffi_flags(cfg,fc->pid,ffi_);
if(cfg->writeback_cache)
l::tweak_flags_writeback_cache(&ffi_->flags);