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fuchsia / third_party / f2fs / f562e520ea33c44b44125c7a7c72beed0ad75e8b
commitf562e520ea33c44b44125c7a7c72beed0ad75e8b[log] [tgz]
authorDongjin Kim <dongjin_.kim@samsung.com>Wed May 26 13:24:18 2021 +0900
committerBrett Wilson <brettw@google.com>Tue Jun 01 17:34:57 2021 +0000
treefef143716af668460e1f90bd38fc9fac00cd8c6e
parent9fd2c9ec4c2cf7b76a6ccf94bb489ca2b311fcc0 [diff]
[f2fs] Correct attribute handlings

Set correct time to time values in Inode.
Change calculation of size of allocated blocks.

Test: fx test fs-tests
Failed tests: RwFullDiskTest.PartialWriteSucceedsForFullDisk/F2fs
Failed tests: WatcherTest.Add/F2fs, WatcherTest.Existing/F2fs, WatcherTest.Removed/F2fs

Change-Id: I9181d611e1291ce00a4533f445d40c8386fbe4fb
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/536511
Reviewed-by: Brett Wilson <brettw@google.com>
6 files changed
tree: fef143716af668460e1f90bd38fc9fac00cd8c6e
  1. patches/
  2. test_files/
  3. third_party/
  4. tools/
  5. AUTHORS
  6. bcache.cc
  7. bcache.h
  8. BUILD.gn
  9. checkpoint.cc
  10. CONTRIBUTING.md
  11. data.cc
  12. dir.cc
  13. dir.h
  14. dir_hash.cc
  15. f2fs.cc
  16. f2fs.h
  17. f2fs_internal.h
  18. f2fs_layout.h
  19. f2fs_lib.h
  20. f2fs_types.h
  21. file.cc
  22. file.h
  23. LICENSE
  24. mkfs.cc
  25. mkfs.h
  26. namei.cc
  27. node.cc
  28. node.h
  29. PATENTS
  30. README.md
  31. recovery.cc
  32. segment.cc
  33. segment.h
  34. super.cc
  35. vnode.cc
  36. 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
  • 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
  • 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 core.x64 --with-base //bundles:tools --with-base //bundles:tests --with-base third_party/f2fs $ fx emu -N --headless (see third_party/f2fs/test_files/README.md for test)