526088ef62
Summary: Implement the repair() logic for InodeDataError, MissingMaterializedInode, and OrphanInode. The most common errors we see after an unclean system reboot is an inode file not being present at all (`MissingMaterializedInode`), or it being present but empty (`InodeDataError`). When either of these errors occurs for a directory it also produces `OrphanInode` errors, as all of the children entries in the directory are no longer part of the directory hierarchy. This implements repair logic for these three error types. The repair behavior is largely similar to the Python version in `eden/cli/fsck.py`, with some minor changes to the output paths in the `lost+found/` repair directory. This also includes more unit test to better exercise handling when `InodeDataError` and `MissingMaterializedInode` errors occur inside an orphan subdirectory that needs to be extracted to `lost+found` Reviewed By: strager Differential Revision: D16577696 fbshipit-source-id: 948158c5a0c32b31574d93011281c42051645ad9 |
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|---|---|---|
| build | ||
| CMake | ||
| common | ||
| eden | ||
| .gitignore | ||
| .travis.yml | ||
| CMakeLists.txt | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| getdeps.py | ||
| LICENSE | ||
| make-client.py | ||
| README.md | ||
EdenFS is a FUSE virtual filesystem for source control repositories.
EdenFS speeds up operations in large repositories by only populating working
directory files on demand, as they are accessed. This makes operations like
checkout much faster, in exchange for a small performance hit when first
accessing new files. This is quite beneficial in large repositories where
developers often only work with a small subset of the repository at a time.
EdenFS has similar performance advantages to using sparse checkouts, but a much better user experience. Unlike with sparse checkouts, EdenFS does not require manually curating the list of files to check out, and users can transparently access any file without needing to update the profile.
EdenFS also keeps track of which files have been modified, allowing very
efficient status queries that do not need to scan the working directory.
The filesystem monitoring tool Watchman
also integrates with EdenFS, allowing it to more efficiently track updates to
the filesystem.
Building EdenFS
EdenFS currently only builds on Linux. We have primarily tested building it on Ubuntu 18.04.
TL;DR
[eden]$ ./getdeps.py --system-deps
[eden]$ mkdir _build && cd _build
[eden/_build]$ cmake ..
[eden/_build]$ make
Dependencies
EdenFS depends on several other third-party projects. Some of these are commonly available as part of most Linux distributions, while others need to be downloaded and built from GitHub.
The getdeps.py script can be used to help download and build EdenFS's
dependencies.
Operating System Dependencies
Running getdeps.py with --system-deps will make it install third-party
dependencies available from your operating system's package management system.
Without this argument it assumes you already have correct OS dependencies
installed, and it only updates and builds dependencies that must be compiled
from source.
GitHub Dependencies
By default getdeps.py will check out third-party dependencies into the
eden/external/ directory, then build and install them into
eden/external/install/
If repositories for some of the dependencies are already present in
eden/external/ getdeps.py does not automatically fetch the latest upstream
changes from GitHub. You can explicitly run ./getdeps.py --update if you
want it to fetch the latest updates for each dependency and rebuild them from
scratch.
License
See LICENSE.