libfs: improve cleanup of shared file mappings

2026-05-30 10:08:07 +01:00
parent aaea926f4d
commit 651ddf7827
3 changed files with 30 additions and 4 deletions
@@ -211,14 +211,29 @@ static enum fs_status handle_vm_request_detach(
 	}

 	kern_tracef(
-		"received vm request (detach) for file %s",
-		mapping->m_file->f_dent->d_name);
+		"received vm request (detach) for file %s (ref=%zu)",
+		mapping->m_file->f_dent->d_name,
+		mapping->m_ref);
+
+	if (mapping->m_ref > 1) {
+		mapping->m_ref--;
+		return FS_SUCCESS;
+	}

 	struct fs_file *f = mapping->m_file;
 	switch (mapping->m_type) {
 	case FILE_MAPPING_PRIVATE:
+		kern_tracef(
+			"destroying private mapping of %s",
+			f->f_dent->d_name);
 		queue_delete(&f->f_mappings, &mapping->m_entry);
 		break;
+	case FILE_MAPPING_SHARED:
+		kern_tracef(
+			"destroying shared mapping of %s",
+			f->f_dent->d_name);
+		f->f_inode->i_shared_mapping = NULL;
+		break;
 	default:
 		break;
 	}