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fuchsia / third_party / f2fs / f6da96217e8b332d8172aa3663827e027a0f8917
commitf6da96217e8b332d8172aa3663827e027a0f8917[log] [tgz]
authorJaeyoon Choi <j_yoon.choi@samsung.com>Wed Apr 28 21:03:08 2021 +0900
committerBrett Wilson <brettw@google.com>Tue May 18 18:00:39 2021 +0000
treecf3c8853f89e612f9feda04cb22b991da09c3e2d
parenta3c0cd115675bf256b99cd90993f250e0d776d63 [diff]
[f2fs] code refactoring: f2fs_layout.h, f2fs_internal.h

  Change #define to constexpr and inline function (f2fs_layout.h, f2fs_internal.h)
  (comment: #80, #749  https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/511842)

  Change struct xxx to xxx (f2fs_layout.h, f2fs_internal.h)
  (comment: #312 https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/520881/2)

  Add default initializers for struct member variables (f2fs_layout.h, f2fs_internal.h)
  (comment: #53 https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/511839)

  Change unsigned char style to uint8_t (f2fs_layout.h, f2fs_internal.h)
  (comment: #142 https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/511840)

  Change enum to enum class (f2fs_layout.h, f2fs_internal.h)
  (comment: #429 https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/511841)

  Remove f2fs prefix (f2fs_layout.h, f2fs_internal.h)
  (comment: #84 https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/511841)

  Change struct name to C-style name (f2fs_layout.h, f2fs_internal.h)
  (comment: #440 https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/511841)

  remove unnecessary #includes

Change-Id: I255722ed104127205b3a24c85a2592886f171deb
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/531061
Reviewed-by: Brett Wilson <brettw@google.com>
23 files changed
tree: cf3c8853f89e612f9feda04cb22b991da09c3e2d
  1. test_files/
  2. third_party/
  3. tools/
  4. AUTHORS
  5. bcache.cc
  6. bcache.h
  7. BUILD.gn
  8. checkpoint.cc
  9. CONTRIBUTING.md
  10. data.cc
  11. dir.cc
  12. dir.h
  13. dir_hash.cc
  14. f2fs.cc
  15. f2fs.h
  16. f2fs_internal.h
  17. f2fs_layout.h
  18. f2fs_lib.h
  19. f2fs_types.h
  20. file.cc
  21. file.h
  22. LICENSE
  23. mkfs.cc
  24. mkfs.h
  25. namei.cc
  26. node.cc
  27. node.h
  28. PATENTS
  29. README.md
  30. recovery.cc
  31. segment.cc
  32. segment.h
  33. super.cc
  34. vnode.cc
  35. vnode.h
README.md

What is F2FS?

F2FS is the most commonly used log-structured file system in Linux. It supports flash-friendly features such as adaptive logging, multi-head logging, fsync acceleration, and node address translation. For more information see: https://www.usenix.org/conference/fast15/technical-sessions/presentation/lee

Major Release

1st release (Apr-06-2021)

  • Features: mkfs, mount/umount, read, write, rmdir, mkdir, rename, fsync, lseek, link, unlink
  • Remarks
  • Fuchsia base code ; Thu Mar 11 08:53:24 2021 Prashanth Swaminathan,76a08ad1474 [speak] Migrate to new component templates
  • There is no cache. Every request is handled as a synchronous operation.
  • fsync() triggers checkpointing
  • lock granularity: file operation
  • LFS is used for block allocation by default, and IPU is forced when the number of free sections is below 50%.
  • no background/foreground gc
  • disable the roll-forward recovery
  • 6 active logs
  • disable the ext-identify feature
  • block allocation: LFS, IPU
  • fsck do nothing, but it returns true
  • no discard

2nd release (May-28-2021)

  • Features: truncate, ssr, fsync, recovery
  • Remarks
  • support the roll-forward recovery and file level fsync()
  • block allocation: LFS, IPU, SSR
  • truncate

3rd release (June-25-2021)

  • Features: fsck, mount option, mkfs option
  • Remarts
  • fsck (base: bbf6e62)
  • support the ext-identify feature
  • support discard

4th release (July-30-2021 ~)

  • Testability
  • Features: buffered IO, gc (if writable PagedVfs is available)
  • Remarks
  • background/foreground gc
  • caching node/meta blocks
  • read ahead
  • Page level locking
  • buffered IO
  • mmap
  • IPU can be disabled.
  • support fvm
  • xattr

How to build

$ fx set bringup.x64 --with //bundles:tools --with-base //bundles/buildbot:bringup --with-base third_party/f2fs --with-base third_party/f2fs/tools:f2fs-tools $ fx build $ fx emu -N --headless -hda third_party/f2fs/test_files/blk{500m or 1g}.bin (see third_party/f2fs/test_files/README.md for test)