fix removePathFromInode2Path

weed/mount/inode_to_path.go

@@ -174,10 +174,15 @@ func (i *InodeToPath) RemovePath(path util.FullPath) {
 }
 
 func (i *InodeToPath) removePathFromInode2Path(inode uint64, path util.FullPath) {
-	if ie, found := i.inode2path[inode]; found {
-		if ie.removeOnePath(path) && len(ie.paths) == 0 {
-			delete(i.inode2path, inode)
+	ie, found := i.inode2path[inode]
+	if !found {
+		return
 	}
+	if !ie.removeOnePath(path) {
+		return
+	}
+	if len(ie.paths) == 0 {
+		delete(i.inode2path, inode)
 	}
 }
 

weed/mount/inode_to_path_test.go

@@ -0,0 +1,79 @@
+package mount
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"testing"
+)
+
+func TestInodeEntry_removeOnePath(t *testing.T) {
+	tests := []struct {
+		name  string
+		entry InodeEntry
+		p     util.FullPath
+		want  bool
+		count int
+	}{
+		{
+			name:  "empty",
+			entry: InodeEntry{},
+			p:     "x",
+			want:  false,
+			count: 0,
+		},
+		{
+			name: "single",
+			entry: InodeEntry{
+				paths: []util.FullPath{"/x"},
+			},
+			p:     "/x",
+			want:  true,
+			count: 0,
+		},
+		{
+			name: "first",
+			entry: InodeEntry{
+				paths: []util.FullPath{"/x", "/y", "/z"},
+			},
+			p:     "/x",
+			want:  true,
+			count: 2,
+		},
+		{
+			name: "middle",
+			entry: InodeEntry{
+				paths: []util.FullPath{"/x", "/y", "/z"},
+			},
+			p:     "/y",
+			want:  true,
+			count: 2,
+		},
+		{
+			name: "last",
+			entry: InodeEntry{
+				paths: []util.FullPath{"/x", "/y", "/z"},
+			},
+			p:     "/z",
+			want:  true,
+			count: 2,
+		},
+		{
+			name: "not found",
+			entry: InodeEntry{
+				paths: []util.FullPath{"/x", "/y", "/z"},
+			},
+			p:     "/t",
+			want:  false,
+			count: 3,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := tt.entry.removeOnePath(tt.p); got != tt.want {
+				t.Errorf("removeOnePath() = %v, want %v", got, tt.want)
+			}
+			if tt.count != len(tt.entry.paths) {
+				t.Errorf("removeOnePath path count = %v, want %v", len(tt.entry.paths), tt.count)
+			}
+		})
+	}
+}