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fuchsia / third_party / f2fs / c1d5852fe9aa5f0b1cc39195076cc80437d8d87c
commitc1d5852fe9aa5f0b1cc39195076cc80437d8d87c[log] [tgz]
authorSeokhwan Kim <sukka.kim@samsung.com>Wed Jul 28 22:46:12 2021 +0900
committerBrett Wilson <brettw@google.com>Thu Jul 29 16:19:36 2021 +0000
treea879c379f35d8ba1ab66173455d3011ca070ecbf
parent488c250872570bb8f20cf4a4b8eb8610b629042f [diff]
[f2fs] Correct dirty/prefree segment operations

This change removes using prefree segments that should not be used
before checkpoint since they can be used for spor. It also modifies
DoWritePage to try to set dirty segments regarding new/old addr
instead of old curseg since new addr is always allocated from
old curseg. Meanwhile, RecoverDataPage/RewriteNodePage need to
consider all segments for old addr, new addr, and old curseg
since they can be different from each other. Finally, it adds
basic unit tests for Segmgr and removes the c-style code.

Test: fx test f2fs-unittest f2fs-fs-tests f2fs-slow-fs-tests

Change-Id: Ifaeed1f6fe135711a03d370d6d7e48e0abbf1532
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/560782
Reviewed-by: Brett Wilson <brettw@google.com>
5 files changed
tree: a879c379f35d8ba1ab66173455d3011ca070ecbf
  1. patches/
  2. test/
  3. test_files/
  4. third_party/
  5. tools/
  6. AUTHORS
  7. bcache.cc
  8. bcache.h
  9. BUILD.gn
  10. checkpoint.cc
  11. CONTRIBUTING.md
  12. data.cc
  13. dir.cc
  14. dir.h
  15. dir_hash.cc
  16. f2fs.cc
  17. f2fs.h
  18. f2fs_internal.h
  19. f2fs_layout.h
  20. f2fs_lib.h
  21. f2fs_types.h
  22. file.cc
  23. file.h
  24. fsck.cc
  25. fsck.h
  26. gc.cc
  27. inline.cc
  28. LICENSE
  29. mkfs.cc
  30. mkfs.h
  31. mount.cc
  32. mount.h
  33. namei.cc
  34. namestring.h
  35. node.cc
  36. node.h
  37. PATENTS
  38. README.md
  39. recovery.cc
  40. segment.cc
  41. segment.h
  42. super.cc
  43. vnode.cc
  44. vnode.h
  45. vnode_cache.cc
  46. vnode_cache.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
  • Fuchsia base code ; Thu May 20 07:25:45 2021 Yilong Li, 02c0dfff0fdb
  • 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
  • all fs-tests and large-fs-tests passed
  • Remarks
  • fsck (base: 7f35b548d4b)
  • support the ext-identify feature
  • support discard

4th release (July-30-2021)

  • Features: vnode cache, inline dentry
  • unit test coverage

5th release (August-27-2021)

  • Features: dentry cache
  • Landing
  • Linux compatibility test coverage

6th release (September-30-2021 ~)

  • Features: gc, node cache, pager support, mmap, wb, readahead, ... (as new fuchsia features coming)
  • stress test coverage
  • performance test

How to build

$ fx set core.x64 --with-base //bundles:tools --with-base //bundles:tests --with-base third_party/f2fs
(see third_party/f2fs/test_files/README.md for test)