[f2fs] Add error handling for hard link

This change corrects error handling in Link(), and
it adds the HardLinkTest support for f2fs.

Test: fx test fs-tests large-fs-tests

Prerequisite:
FUCHSIA_DIR$ patch -p1 < \
third_party/f2fs/patches/0005-f2fs-Enable-hardlink-for-f2fs-fs_test.patch

Change-Id: Ibe50da42f086e61a91cf78fef7e490f8ef8e0814
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/539563
Reviewed-by: Brett Wilson <brettw@google.com>
2 files changed
tree: 6dd84bfd78bcc49739445ac7dab4413c6c7863f3
  1. AUTHORS
  2. BUILD.gn
  3. CONTRIBUTING.md
  4. LICENSE
  5. PATENTS
  6. README.md
  7. bcache.cc
  8. bcache.h
  9. checkpoint.cc
  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. gc.cc
  23. mkfs.cc
  24. mkfs.h
  25. namei.cc
  26. namestring.h
  27. node.cc
  28. node.h
  29. patches/
  30. recovery.cc
  31. segment.cc
  32. segment.h
  33. super.cc
  34. test_files/
  35. third_party/
  36. tools/
  37. vnode.cc
  38. 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)