[PATCH proxmox-backup 15/26] metric collection: use blockdev_stat_for_path from proxmox_disks

[Lukas Wagner <l.wagner@proxmox.com>]

This part of the gather_disk_stats helper has been moved to
proxmox_disks directly, so it makes sense to use the moved
implementation in PBS as well.

Signed-off-by: Lukas Wagner <l.wagner@proxmox.com>
---
 src/server/metric_collection/mod.rs | 49 ++++++-----------------------
 1 file changed, 10 insertions(+), 39 deletions(-)

diff --git a/src/server/metric_collection/mod.rs b/src/server/metric_collection/mod.rs
index 3fa6e9fbf..bd197a386 100644
--- a/src/server/metric_collection/mod.rs
+++ b/src/server/metric_collection/mod.rs
@@ -7,10 +7,11 @@ use std::{
 };
 
 use anyhow::Error;
+use log::error;
 use tokio::join;
 
 use pbs_api_types::{DataStoreConfig, Operation};
-use proxmox_disks::{zfs_dataset_stats, BlockDevStat, DiskManage};
+use proxmox_disks::{BlockDevStat, DiskManage};
 use proxmox_network_api::{get_network_interfaces, IpLink};
 use proxmox_sys::{
     fs::FileSystemInformation,
@@ -221,7 +222,7 @@ fn collect_host_stats_sync() -> HostStats {
 fn collect_disk_stats_sync() -> (DiskStat, Vec<DiskStat>) {
     let disk_manager = DiskManage::new();
 
-    let root = gather_disk_stats(disk_manager.clone(), Path::new("/"), "host");
+    let root = gather_disk_stats(disk_manager.clone(), Path::new("/"), "root".into());
 
     let mut datastores = Vec::new();
     match pbs_config::datastore::config() {
@@ -245,7 +246,7 @@ fn collect_disk_stats_sync() -> (DiskStat, Vec<DiskStat>) {
                 datastores.push(gather_disk_stats(
                     disk_manager.clone(),
                     Path::new(&config.absolute_path()),
-                    &config.name,
+                    config.name.clone(),
                 ));
             }
         }
@@ -257,7 +258,7 @@ fn collect_disk_stats_sync() -> (DiskStat, Vec<DiskStat>) {
     (root, datastores)
 }
 
-fn gather_disk_stats(disk_manager: Arc<DiskManage>, path: &Path, name: &str) -> DiskStat {
+fn gather_disk_stats(disk_manager: Arc<DiskManage>, path: &Path, name: String) -> DiskStat {
     let usage = match proxmox_sys::fs::fs_info(path) {
         Ok(status) => Some(status),
         Err(err) => {
@@ -266,40 +267,10 @@ fn gather_disk_stats(disk_manager: Arc<DiskManage>, path: &Path, name: &str) ->
         }
     };
 
-    let dev = match disk_manager.find_mounted_device(path) {
-        Ok(None) => None,
-        Ok(Some((fs_type, device, source))) => {
-            let mut device_stat = None;
-            match (fs_type.as_str(), source) {
-                ("zfs", Some(source)) => match source.into_string() {
-                    Ok(dataset) => match zfs_dataset_stats(&dataset) {
-                        Ok(stat) => device_stat = Some(stat),
-                        Err(err) => eprintln!("zfs_dataset_stats({dataset:?}) failed - {err}"),
-                    },
-                    Err(source) => {
-                        eprintln!("zfs_pool_stats({source:?}) failed - invalid characters")
-                    }
-                },
-                _ => {
-                    if let Ok(disk) = disk_manager.clone().disk_by_dev_num(device.into_dev_t()) {
-                        match disk.read_stat() {
-                            Ok(stat) => device_stat = stat,
-                            Err(err) => eprintln!("disk.read_stat {path:?} failed - {err}"),
-                        }
-                    }
-                }
-            }
-            device_stat
-        }
-        Err(err) => {
-            eprintln!("find_mounted_device failed - {err}");
-            None
-        }
-    };
+    let dev = disk_manager
+        .blockdev_stat_for_path(path)
+        .inspect_err(|err| error!("could not read blockdev stats: {err:#}"))
+        .ok();
 
-    DiskStat {
-        name: name.to_string(),
-        usage,
-        dev,
-    }
+    DiskStat { name, usage, dev }
 }
-- 
2.47.3