| f2fs_io(8) | System Administration Utilities | f2fs_io(8) |
NAME
f2fs_io - f2fs ioctl utility
DESCRIPTION
f2fs_io is used to send various commands to the f2fs file system for administrative purposes.
AVAILABLE COMMANDS
- set_verity [file]
- Set the verity flags associated with the specified file.
- getflags [file]
- Get the flags associated with the specified file.
- setflags [flag] [file]
- Set an f2fs file on specified file. The flag can be casefold, compression, and nocompression.
- shutdown shutdown filesystem
- Freeze and stop all IOs for the file system mounted on dir. The level parameter can be:
- 0
- going down with full sync
- 1
- going down with checkpoint only
- 2
- going down with no sync
- 3
- going down with metadata flush
- 4
- going down with fsck mark
- pinfile [get|set] [file]
- Get or set the pinning status on a file.
- fallocate [keep_size] [offset] [length] [file]
- Request that space be allocated on a file. The keep_size parameter can be either 1 or 0.
- write [chunk_size in 4kb] [offset in chunk_size] [count] [pattern] [IO] [file_path]
- Write a given pattern to file_path. The pattern parameter can be:
- The IO parameter can be:
- read [chunk_size in 4kb] [offset in chunk_size] [count] [IO] [print_nbytes] [file_path]
- Read data in file_path and print print_nbytes. The IO options can be:
- fiemap [offset in 4kb] [count] [file_path]
- get block address in file
- gc_urgent dev [start|end|run] [time in sec]
- Start, end, or run gc_urgent for a given time period
- defrag_file [start] [length] [file_path]
- Defragment a file.
- copy [-d] [-m] [-s] [src_path] [dst_path]
- Copy file from src_path to dst_path. The pattern parameter can be:
- get_cblocks [file]
- Get the number of compressed blocks.
- release_cblocks [file]
- Release compressed blocks to get free space.
- reserve_cblocks [file]
- Reserve free blocks to prepare decompressing blocks in the file.
- gc [sync_mode] [file]
- Trigger filesystem GC
AUTHOR
This version of f2fs_io has been written by Jaegeuk Kim <jaegeuk@kernel.org>.
AVAILABILITY
f2fs_io is available from git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-tools.git.
| March 2020 | f2fs-tools |