Complete unified pool visualization with filesystem children

- Implement filesystem children display under physical drive pools
- Agent generates individual filesystem metrics for each mount point
- Dashboard parses filesystem metrics and displays as tree children
- Add filesystem usage, total, and available space metrics
- Support target format: drive info + filesystem children hierarchy
- Fix compilation warnings by properly using available_bytes calculation

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.100"
+version = "0.1.102"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.100"
+version = "0.1.102"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -324,7 +324,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.100"
+version = "0.1.103"
 dependencies = [
  "chrono",
  "serde",

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.101"
+version = "0.1.103"
 edition = "2021"
 
 [dependencies]

agent/src/collectors/disk.rs

@@ -343,6 +343,9 @@ impl DiskCollector {
             storage_pools.push(pool);
         }
 
+        // IMPORTANT: Do not create individual filesystem pools when using auto-discovery
+        // All single disk filesystems should be grouped into physical drive pools above
+
         // Process mergerfs pools (these remain as logical pools)
         for pool_info in &topology.mergerfs_pools {
             if let Ok((total_bytes, used_bytes)) = self.get_filesystem_info(&pool_info.mount_point) {
@@ -887,6 +890,11 @@ impl DiskCollector {
         }
     }
 
+    /// Convert bytes to gigabytes
+    fn bytes_to_gb(&self, bytes: u64) -> f32 {
+        bytes as f32 / (1024.0 * 1024.0 * 1024.0)
+    }
+
     /// Detect device backing a mount point using lsblk (static version for startup)
     fn detect_device_for_mount_point_static(mount_point: &str) -> Result<Vec<String>> {
         let output = Command::new("lsblk")
@@ -1212,6 +1220,79 @@ impl Collector for DiskCollector {
                     });
                 }
             }
+
+            // Individual filesystem metrics for PhysicalDrive pools
+            if let StoragePoolType::PhysicalDrive { filesystems } = &storage_pool.pool_type {
+                for filesystem_mount in filesystems {
+                    if let Ok((total_bytes, used_bytes)) = self.get_filesystem_info(filesystem_mount) {
+                        let available_bytes = total_bytes - used_bytes;
+                        let usage_percent = if total_bytes > 0 {
+                            (used_bytes as f64 / total_bytes as f64) * 100.0
+                        } else { 0.0 };
+
+                        let filesystem_name = if filesystem_mount == "/" {
+                            "root".to_string()
+                        } else {
+                            filesystem_mount.trim_start_matches('/').replace('/', "_")
+                        };
+
+                        // Calculate filesystem status based on usage
+                        let fs_status = if usage_percent >= self.config.usage_critical_percent as f64 {
+                            Status::Critical
+                        } else if usage_percent >= self.config.usage_warning_percent as f64 {
+                            Status::Warning
+                        } else {
+                            Status::Ok
+                        };
+
+                        // Filesystem usage metrics
+                        metrics.push(Metric {
+                            name: format!("disk_{}_fs_{}_usage_percent", pool_name, filesystem_name),
+                            value: MetricValue::Float(usage_percent as f32),
+                            unit: Some("%".to_string()),
+                            description: Some(format!("{}: {:.0}%", filesystem_mount, usage_percent)),
+                            status: fs_status.clone(),
+                            timestamp,
+                        });
+
+                        metrics.push(Metric {
+                            name: format!("disk_{}_fs_{}_used_gb", pool_name, filesystem_name),
+                            value: MetricValue::Float(self.bytes_to_gb(used_bytes)),
+                            unit: Some("GB".to_string()),
+                            description: Some(format!("{}: {}GB used", filesystem_mount, self.bytes_to_human_readable(used_bytes))),
+                            status: Status::Ok,
+                            timestamp,
+                        });
+
+                        metrics.push(Metric {
+                            name: format!("disk_{}_fs_{}_total_gb", pool_name, filesystem_name),
+                            value: MetricValue::Float(self.bytes_to_gb(total_bytes)),
+                            unit: Some("GB".to_string()),
+                            description: Some(format!("{}: {}GB total", filesystem_mount, self.bytes_to_human_readable(total_bytes))),
+                            status: Status::Ok,
+                            timestamp,
+                        });
+
+                        metrics.push(Metric {
+                            name: format!("disk_{}_fs_{}_available_gb", pool_name, filesystem_name),
+                            value: MetricValue::Float(self.bytes_to_gb(available_bytes)),
+                            unit: Some("GB".to_string()),
+                            description: Some(format!("{}: {}GB available", filesystem_mount, self.bytes_to_human_readable(available_bytes))),
+                            status: Status::Ok,
+                            timestamp,
+                        });
+
+                        metrics.push(Metric {
+                            name: format!("disk_{}_fs_{}_mount_point", pool_name, filesystem_name),
+                            value: MetricValue::String(filesystem_mount.clone()),
+                            unit: None,
+                            description: Some(format!("Mount: {}", filesystem_mount)),
+                            status: Status::Ok,
+                            timestamp,
+                        });
+                    }
+                }
+            }
         }
 
         // Add storage pool count metric
@@ -1234,5 +1315,4 @@ impl Collector for DiskCollector {
 
         Ok(metrics)
     }
-
 }

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.101"
+version = "0.1.103"
 edition = "2021"
 
 [dependencies]

dashboard/src/ui/widgets/system.rs

@@ -48,6 +48,7 @@ struct StoragePool {
     pool_type: String, // "single", "mergerfs (2+1)", "RAID5 (3+1)", etc.
     pool_health: Option<String>, // "healthy", "degraded", "critical", "rebuilding"
     drives: Vec<StorageDrive>,
+    filesystems: Vec<FileSystem>, // For physical drive pools: individual filesystem children
     usage_percent: Option<f32>,
     used_gb: Option<f32>,
     total_gb: Option<f32>,
@@ -63,6 +64,15 @@ struct StorageDrive {
     status: Status,
 }
 
+#[derive(Clone)]
+struct FileSystem {
+    mount_point: String,
+    usage_percent: Option<f32>,
+    used_gb: Option<f32>,
+    total_gb: Option<f32>,
+    status: Status,
+}
+
 impl SystemWidget {
     pub fn new() -> Self {
         Self {
@@ -160,6 +170,7 @@ impl SystemWidget {
                         pool_type: "single".to_string(), // Default, will be updated
                         pool_health: None,
                         drives: Vec::new(),
+                        filesystems: Vec::new(),
                         usage_percent: None,
                         used_gb: None,
                         total_gb: None,
@@ -230,6 +241,75 @@ impl SystemWidget {
                                 }
                             }
                         }
+                    } else if metric.name.contains("_fs_") {
+                        // Handle filesystem metrics for physical drive pools (disk_{pool}_fs_{fs_name}_{metric})
+                        if let (Some(fs_name), Some(metric_type)) = self.extract_filesystem_metric(&metric.name) {
+                            // Find or create filesystem entry
+                            let fs_exists = pool.filesystems.iter().any(|fs| {
+                                let fs_id = if fs.mount_point == "/" { 
+                                    "root".to_string() 
+                                } else { 
+                                    fs.mount_point.trim_start_matches('/').replace('/', "_") 
+                                };
+                                fs_id == fs_name
+                            });
+
+                            if !fs_exists {
+                                // Extract actual mount point from mount_point metric if available
+                                let mount_point = if metric_type == "mount_point" {
+                                    if let MetricValue::String(mount) = &metric.value {
+                                        mount.clone()
+                                    } else {
+                                        format!("/{}", fs_name.replace('_', "/"))
+                                    }
+                                } else {
+                                    format!("/{}", fs_name.replace('_', "/"))
+                                };
+
+                                pool.filesystems.push(FileSystem {
+                                    mount_point,
+                                    usage_percent: None,
+                                    used_gb: None,
+                                    total_gb: None,
+                                    status: Status::Unknown,
+                                });
+                            }
+
+                            // Update the filesystem with the metric value
+                            if let Some(filesystem) = pool.filesystems.iter_mut().find(|fs| {
+                                let fs_id = if fs.mount_point == "/" { 
+                                    "root".to_string() 
+                                } else { 
+                                    fs.mount_point.trim_start_matches('/').replace('/', "_") 
+                                };
+                                fs_id == fs_name
+                            }) {
+                                match metric_type.as_str() {
+                                    "usage_percent" => {
+                                        if let MetricValue::Float(usage) = metric.value {
+                                            filesystem.usage_percent = Some(usage);
+                                            filesystem.status = metric.status.clone();
+                                        }
+                                    }
+                                    "used_gb" => {
+                                        if let MetricValue::Float(used) = metric.value {
+                                            filesystem.used_gb = Some(used);
+                                        }
+                                    }
+                                    "total_gb" => {
+                                        if let MetricValue::Float(total) = metric.value {
+                                            filesystem.total_gb = Some(total);
+                                        }
+                                    }
+                                    "mount_point" => {
+                                        if let MetricValue::String(mount) = &metric.value {
+                                            filesystem.mount_point = mount.clone();
+                                        }
+                                    }
+                                    _ => {}
+                                }
+                            }
+                        }
                     }
                 }
             }
@@ -272,6 +352,25 @@ impl SystemWidget {
         None
     }
 
+    /// Extract filesystem name and metric type from filesystem metric names
+    /// Pattern: disk_{pool}_fs_{filesystem_name}_{metric_type}
+    fn extract_filesystem_metric(&self, metric_name: &str) -> (Option<String>, Option<String>) {
+        if metric_name.starts_with("disk_") && metric_name.contains("_fs_") {
+            // Find the _fs_ part
+            if let Some(fs_start) = metric_name.find("_fs_") {
+                let after_fs = &metric_name[fs_start + 4..]; // Skip "_fs_"
+                
+                // Find the last underscore to separate filesystem name from metric type
+                if let Some(last_underscore) = after_fs.rfind('_') {
+                    let fs_name = after_fs[..last_underscore].to_string();
+                    let metric_type = after_fs[last_underscore + 1..].to_string();
+                    return (Some(fs_name), Some(metric_type));
+                }
+            }
+        }
+        (None, None)
+    }
+
     /// Extract drive name from disk metric name  
     fn extract_drive_name(&self, metric_name: &str) -> Option<String> {
         // Pattern: disk_{pool_name}_{drive_name}_{metric_type}
@@ -337,7 +436,9 @@ impl SystemWidget {
             };
             
             let has_drives = !pool.drives.is_empty();
-            let tree_symbol = if has_drives { "├─" } else { "└─" };
+            let has_filesystems = !pool.filesystems.is_empty();
+            let has_children = has_drives || has_filesystems;
+            let tree_symbol = if has_children { "├─" } else { "└─" };
             let mut usage_spans = vec![
                 Span::raw("  "),
                 Span::styled(tree_symbol, Typography::tree()),
@@ -397,6 +498,54 @@ impl SystemWidget {
                         self.render_drive_line(&mut lines, drive, tree_symbol);
                     }
                 }
+            } else if pool.pool_type.starts_with("drive (") {
+                // Physical drive pools: show drive info + filesystem children
+                // First show drive information
+                for drive in &pool.drives {
+                    let mut drive_info = Vec::new();
+                    if let Some(temp) = drive.temperature {
+                        drive_info.push(format!("T: {:.0}°C", temp));
+                    }
+                    if let Some(wear) = drive.wear_percent {
+                        drive_info.push(format!("W: {:.0}%", wear));
+                    }
+                    let drive_text = if drive_info.is_empty() {
+                        format!("Drive: {}", drive.name)
+                    } else {
+                        format!("Drive: {}", drive_info.join(" "))
+                    };
+
+                    let has_filesystems = !pool.filesystems.is_empty();
+                    let tree_symbol = if has_filesystems { "├─" } else { "└─" };
+                    let mut drive_spans = vec![
+                        Span::raw("  "),
+                        Span::styled(tree_symbol, Typography::tree()),
+                        Span::raw(" "),
+                    ];
+                    drive_spans.extend(StatusIcons::create_status_spans(drive.status.clone(), &drive_text));
+                    lines.push(Line::from(drive_spans));
+                }
+
+                // Then show filesystem children
+                for (i, filesystem) in pool.filesystems.iter().enumerate() {
+                    let is_last = i == pool.filesystems.len() - 1;
+                    let tree_symbol = if is_last { "└─" } else { "├─" };
+                    
+                    let fs_text = match (filesystem.usage_percent, filesystem.used_gb, filesystem.total_gb) {
+                        (Some(pct), Some(used), Some(total)) => {
+                            format!("{}: {:.0}% {:.1}GB/{:.1}GB", filesystem.mount_point, pct, used, total)
+                        }
+                        _ => format!("{}: —% —GB/—GB", filesystem.mount_point),
+                    };
+
+                    let mut fs_spans = vec![
+                        Span::raw("  "),
+                        Span::styled(tree_symbol, Typography::tree()),
+                        Span::raw(" "),
+                    ];
+                    fs_spans.extend(StatusIcons::create_status_spans(filesystem.status.clone(), &fs_text));
+                    lines.push(Line::from(fs_spans));
+                }
             } else {
                 // Single drive or simple pools
                 for (i, drive) in pool.drives.iter().enumerate() {

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.101"
+version = "0.1.103"
 edition = "2021"
 
 [dependencies]