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fuchsia / third_party / f2fs / 69be23fc2679ba4572945214a2ef062509c82e1f
commit69be23fc2679ba4572945214a2ef062509c82e1f[log] [tgz]
authorJaeyoon Choi <j_yoon.choi@samsung.com>Wed Apr 28 16:59:50 2021 +0900
committerBrett Wilson <brettw@google.com>Mon May 17 15:49:51 2021 +0000
treefb8f6e4dff1b159d8f6410748e188f83504144db
parent6bedb2fd5a99211debb3b0d4e28b4aa303cedb3f [diff]
[f2fs] code refactoring: segment.h, segment.cc

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

  Change unsigned int style to uint32_t (segment.h, segmenet.cc)
  (comment: #142 https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/511840)

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

  Change #define to inline function (segment.h, segment.cc, node.cc, recovery.cc)
  (comment: #749 https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/511842)

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

  Change C style cast to static_cast (segment.cc)
  (comment: #571 https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/520880)

  Change #define to constexpr (segment.cc)
  (comment: #9, #128 https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/511840)

  Change error return using zx_status_t (segment.h, segment.cc)
  (comment: #24, #106 https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/520882)

  Apply C++ Style (segment.cc)

Change-Id: I2822d3d3375aabf537141d0e3ac53402ef702259
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/530805
Reviewed-by: Brett Wilson <brettw@google.com>
4 files changed
tree: fb8f6e4dff1b159d8f6410748e188f83504144db
  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)