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# VPP stats segment FUSE filesystem
The statfs binary allows to create a FUSE filesystem to expose and to browse the stats segment.
Is is leaned on the Go-FUSE library and requires Go-VPP stats bindings to work.
The binary mounts a filesystem on the local machine whith the data from the stats segments.
The counters can be opened and read as files (e.g. in a Unix shell).
Note that the value of a counter is determined when the corresponding file is opened (as for /proc/interrupts).
Directories regularly update their contents so that new counters get added to the filesystem.
## Prerequisites (for building)
**GoVPP** library (master branch)
**Go-FUSE** library
vpp, vppapi
## Building
Here, we add the Go librairies before building the binary
```bash
go mod init stats_fs
go get git.fd.io/govpp.git@master
go get git.fd.io/govpp.git/adapter/statsclient@master
go get github.com/hanwen/go-fuse/v2
go build
```
## Usage
The basic usage is:
```bash
sudo ./statfs <MOUNT_POINT> &
```
**Options:**
- debug \<true|false\> (default is false)
- socket \<statSocket\> (default is /run/vpp/stats.sock)
## Browsing the filesystem
You can browse the filesystem as a regular user.
Example:
```bash
cd /path/to/mountpoint
cd sys/node
ls -al
cat names
```
## Unmounting the file system
You can unmount the filesystem with the fusermount command.
```bash
sudo fusermount -u /path/to/mountpoint
```
To force the unmount even if the resource is busy, add the -z option:
```bash
sudo fusermount -uz /path/to/mountpoint
```
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