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Add option to log node memory usage metrics

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This commit is contained in:
Antonio SJ Musumeci 2021-10-10 18:37:14 -04:00
parent 50ede1ba97
commit 5f737cb7bf
5 changed files with 136 additions and 7 deletions
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48
src/fuse_ioctl.cpp
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@ -38,10 +38,19 @@
using std::string;
using std::vector;
#ifndef _IOC_TYPE
#define _IOC_TYPE(X) (((X) >> 8) & 0xFF)
#endif
typedef char IOCTL_BUF[4096];
#define IOCTL_APP_TYPE 0xDF
//#define IOCTL_FILE_INFO 0xD000DF00
#define IOCTL_FILE_INFO _IOWR(IOCTL_APP_TYPE,0,IOCTL_BUF)
#define IOCTL_FILE_INFO _IOWR(IOCTL_APP_TYPE,0,IOCTL_BUF)
#define IOCTL_METRICS_ENABLE _IOWR(IOCTL_APP_TYPE,1,IOCTL_BUF)
#define IOCTL_METRICS_DISABLE _IOWR(IOCTL_APP_TYPE,2,IOCTL_BUF)
static_assert(IOCTL_FILE_INFO == 0xD000DF00,"");
static_assert(IOCTL_METRICS_ENABLE == 0xD000DF01,"");
static_assert(IOCTL_METRICS_DISABLE == 0xD000DF02,"");
#ifndef FS_IOC_GETFLAGS
# define FS_IOC_GETFLAGS _IOR('f',1,long)
@ -305,6 +314,34 @@ namespace l
return -ENOATTR;
}
static
bool
is_mergerfs_ioctl_cmd(const unsigned long cmd_)
{
return (_IOC_TYPE(cmd_) == IOCTL_APP_TYPE);
}
static
int
ioctl_custom(const fuse_file_info_t *ffi_,
unsigned long cmd_,
void *data_)
{
switch(cmd_)
{
case IOCTL_FILE_INFO:
return l::file_info(ffi_,data_);
case IOCTL_METRICS_ENABLE:
fuse_log_metrics(1);
return 0;
case IOCTL_METRICS_DISABLE:
fuse_log_metrics(0);
return 0;
}
return -ENOTTY;
}
}
namespace FUSE
@ -317,11 +354,8 @@ namespace FUSE
void *data_,
uint32_t *out_bufsz_)
{
switch(cmd_)
{
case IOCTL_FILE_INFO:
return l::file_info(ffi_,data_);
}
if(l::is_mergerfs_ioctl_cmd(cmd_))
return l::ioctl_custom(ffi_,cmd_,data_);
if(flags_ & FUSE_IOCTL_DIR)
return l::ioctl_dir(ffi_,cmd_,data_,out_bufsz_);