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a29d465ee8
Summary: With Facebook having been renamed Meta Platforms, we need to change the license headers. Reviewed By: fanzeyi Differential Revision: D33407812 fbshipit-source-id: b11bfbbf13a48873f0cea75f212cc7b07a68fb2e
103 lines
4.0 KiB
Python
103 lines
4.0 KiB
Python
#!/usr/bin/env python3
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# Copyright (c) Meta Platforms, Inc. and affiliates.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2.
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import logging
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import os
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import pathlib
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import stat
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from typing import List
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import eden.integration.lib.overlay as overlay_mod
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from eden.integration.lib import testcase
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@testcase.eden_nfs_repo_test
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class CorruptOverlayTest(testcase.HgRepoTestMixin, testcase.EdenRepoTest):
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"""Test file operations when Eden's overlay is corrupted."""
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def setUp(self) -> None:
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super().setUp() # type: ignore (pyre does not follow python MRO properly)
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self.overlay = overlay_mod.OverlayStore(self.eden, self.mount_path)
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def populate_repo(self) -> None:
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self.repo.write_file("src/committed_file", "committed_file content")
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self.repo.write_file("readme.txt", "readme content")
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self.repo.commit("Initial commit.")
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def _corrupt_files(self) -> List[pathlib.Path]:
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"""Corrupt some files inside the mount.
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Returns relative paths to these files inside the mount.
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"""
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# Corrupt 3 separate files. 2 are tracked by mercurial, one is not.
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# We will corrupt 2 of them by truncating the overlay file, and one by
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# completely removing the overlay file. (In practice an unclean reboot often
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# leaves overlay files that exist but have 0 length.)
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tracked_path = pathlib.Path("src/committed_file")
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untracked_path = pathlib.Path("src/new_file")
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readme_path = pathlib.Path("readme.txt")
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tracked_overlay_file_path = self.overlay.materialize_file(tracked_path)
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untracked_overlay_file_path = self.overlay.materialize_file(untracked_path)
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readme_overlay_file_path = self.overlay.materialize_file(readme_path)
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self.eden.unmount(self.mount_path)
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os.truncate(tracked_overlay_file_path, 0)
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os.unlink(untracked_overlay_file_path)
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os.truncate(readme_overlay_file_path, 0)
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self.eden.mount(self.mount_path)
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return [tracked_path, untracked_path, readme_path]
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def test_unmount_succeeds(self) -> None:
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corrupted_paths = self._corrupt_files()
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# Access the files to make sure that edenfs loads them.
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# The stat calls should succeed, but reading them would fail.
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for path in corrupted_paths:
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os.lstat(str(self.mount_path / path))
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# Make sure that eden can successfully unmount the mount point
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# Previously we had a bug where the inode unloading code would throw an
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# exception if it failed to update the overlay state for some inodes.
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self.eden.unmount(self.mount_path)
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def test_unlink_deletes_corrupted_files(self) -> None:
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corrupted_paths = self._corrupt_files()
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for path in corrupted_paths:
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logging.info(f"stat()ing and unlinking {path}")
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full_path = self.mount_path / path
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s = os.lstat(str(full_path))
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self.assertTrue(stat.S_ISREG, s.st_mode)
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self.assertEqual(0, s.st_mode & 0o7777)
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self.assertEqual(0, s.st_size)
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full_path.unlink()
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self.assertFalse(
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full_path.exists(), f"{full_path} should not exist after being deleted"
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)
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def test_mount_possible_after_corrupt_directory_and_cached_next_inode_number(
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self,
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) -> None:
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test_dir_path = self.mount_path / "test_dir"
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test_dir_path.mkdir()
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test_dir_overlay_file_path = self.overlay.materialize_dir(test_dir_path)
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self.eden.unmount(self.mount_path)
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os.truncate(test_dir_overlay_file_path, 0)
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self.overlay.delete_cached_next_inode_number()
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self.eden.mount(self.mount_path)
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def test_eden_list_does_not_return_corrupt_mounts(self) -> None:
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self.eden.shutdown()
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# Truncate the overlay info file so edenfs will
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# not be able to open the overlay
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os.truncate(self.overlay.get_info_path(), 0)
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self.eden.start()
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self.assertEqual({str(self.mount): "NOT_RUNNING"}, self.eden.list_cmd_simple())
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