set_verity [file] Set the verity flags associated with the specified file.
fsync [file] fsync given the file.
fdatasync [file] fdatasync given the 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, nocompression, immutable, and nocow.
clearflags [flag] [file] Clear the specified flag on the target file, which can be compression, nocompression, immutable, and nocow.
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|unset] [file] Get or set the pinning status on a file.
fadvise [advice] [offset] [length] [file] Pass an advice to the specified file. The advice can be willneed and sequential.
fallocate [-c] [-i] [-p] [-z] [keep_size] [offset] [length] [file] Request that space be allocated on a file. The keep_size parameter can be either 1 or 0. The pattern parameter can be:
-c collapse range
-i insert range
-p punch hole
-z zero range
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:
zero zeros
inc_num incrementing numbers
rand random numbers
buffered buffered I/O
dio direct I/O
dsync direct I/O with O_DSYNC
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:
buffered buffered I/O
dio direct I/O
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:
-d use direct I/O
-m use mmap for source file
-s use sendfile to transfer data
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
checkpoint [file] Trigger filesystem checkpoint
precache_extents [file] Trigger precache extents
move_range [src_path] [dst_path] [src_start] [dst_start] [length] Move a range of data blocks from source file to destination file
gc_range [sync_mode] [start in 4kb] [length in 4kb] [file] Trigger gc to move data blocks from specified address range
get_advise [file] Get i_advise value and info in file