f2fs test file

Decompress gzip files.
$ gunzip -k third_party/f2fs/test_files/blk1g.bin..gz

blk1g.bin

• It has three files with different sizes to test direct data blocks and indirect data blocks.
• Properties: ‘4 KiB’ Block size, active_logs=6, noinline_data
• Directory Tree
  .
  ..
  100mb.bin
  10mb.bin
  1m.bin

File contents in blk1g.bin

Each file is filled with the same pattern of blocks and the beginning of each block has special header (40B) as below.

++++++++++++++++++++++++++++++++++
|Header (40B) for the 1st block |
|0xf2f5 patterns |
|... |
++++++++++++++++++++++++++++++++++
|Header (40B) for the 2nd block |
|0xf2f5 patterns |
|... |

The header (40B) consists of magic number(16B), offset (8B) and CRC, and
the remaining is filled with the ‘0xf2f5’ pattern.

| offset | content |
0000000: caac 0100 0010 0000 0000 0000 0000 0000 ................
0000010: 0000 0000 0000 0000 0000 0000 0000 0000 ................
0000020: 0100 0000 5e61 4f8e f2f5 f2f5 f2f5 f2f5 ....^aO.........
0000030: f2f5 f2f5 f2f5 f2f5 f2f5 f2f5 f2f5 f2f5 ................
...
0001000: caac 0100 0010 0000 0000 0000 0000 0000 ................
0001010: 0010 0000 0000 0000 0000 0000 19c6 0100 ................
0001020: 0100 0100 5d95 70b5 f2f5 f2f5 f2f5 f2f5 ....].p.........
0001030: f2f5 f2f5 f2f5 f2f5 f2f5 f2f5 f2f5 f2f5 ................
0001040: f2f5 f2f5 f2f5 f2f5 f2f5 f2f5 f2f5 f2f5 ................

fs-tests and unit tests

• Step #1: set up the build configuration with f2fs after applying all patches in //third_party/f2fs/patches/ $ fx set core.x64 --with-base //bundles:tools --with-base //bundles:tests --with-base third_party/f2fs
• Step #2: fx test -o f2fs-fs-tests f2fs-slow-fs-tests
• Step #3: fx test -o f2fs-unittest

Simple compatibility test

• Step #1: set up a build configuration for f2fs
  $ fx set core.x64 --with-base //bundles:tools --with-base //bundles:tests --with-base third_party/f2fs

• Step #2: run ‘fx emu’
  $ fx emu -N --headless -hda third_party/f2fs/test_files/blk1g.bin

• Step #3: copy a file in Fuchsia
  $ mkdir tmp/mnt
  $ mount /dev/class/block/000 /tmp/mnt
  $ cd /tmp/mnt
  $ cp 10mb.bin 10mb_dst.bin
  $ umount /tmp/mnt
  $ dm shutdown

• Step #4: verify the copied file in Linux
  $ mkdir ~/mnt
  $ mount -o noinline_data third_party/f2fs/test_files/blk1g.bin ~/mnt
  $ diff ~/mnt/10mb.bin ~/mnt/10mb_dst.bin

Caution

The current Fuchsia F2FS does not support INLINE_DATA.