fw_info/
fw_info.rs

1//! Print firmware-slot information for each NVMe controller.
2//!
3//! Read-only. Demonstrates `Controller::fw_slot_log()`. Run with `sudo`
4//! (or as a member of the `disk` group) since the Get Log Page admin
5//! command needs access to `/dev/nvme*`.
6
7use libnvme::Root;
8
9fn main() -> Result<(), Box<dyn std::error::Error>> {
10    let root = Root::scan()?;
11    let mut any = false;
12    for host in root.hosts() {
13        for subsys in host.subsystems() {
14            for ctrl in subsys.controllers() {
15                any = true;
16                print_fw(&ctrl)?;
17            }
18        }
19    }
20    if !any {
21        println!("(no NVMe controllers found)");
22    }
23    Ok(())
24}
25
26fn print_fw(ctrl: &libnvme::Controller<'_>) -> Result<(), Box<dyn std::error::Error>> {
27    println!("=== {} ===", ctrl.name()?);
28    let log = ctrl.fw_slot_log()?;
29    println!("  AFI byte           : 0x{:02x}", log.afi());
30    println!("  active slot        : {}", log.active_slot());
31    match log.next_slot_to_activate() {
32        Some(slot) => println!("  next activate slot : {}", slot),
33        None => println!("  next activate slot : (none — current image stays active)"),
34    }
35    for slot in 1..=7 {
36        match log.slot_firmware(slot) {
37            Ok("") => println!("  slot {slot}             : (empty)"),
38            Ok(fw) => println!("  slot {slot}             : {fw}"),
39            Err(e) => println!("  slot {slot}             : error: {e}"),
40        }
41    }
42    println!();
43    Ok(())
44}
fw_info/fw_info.rs

fw_info/
fw_info.rs
