{"id":3178,"date":"2022-12-20T16:43:43","date_gmt":"2022-12-20T19:43:43","guid":{"rendered":"http:\/\/lode.uno\/linux-man\/index.php\/2022\/12\/20\/f2fs_io-man8\/"},"modified":"2022-12-20T16:43:43","modified_gmt":"2022-12-20T19:43:43","slug":"f2fs_io-man8","status":"publish","type":"post","link":"https:\/\/lode.uno\/linux-man\/2022\/12\/20\/f2fs_io-man8\/","title":{"rendered":"f2fs_io (man8)"},"content":{"rendered":"

f2fs_io<\/h1>\n

NAME<\/a>
DESCRIPTION<\/a>
AVAILABLE COMMANDS<\/a>
AUTHOR<\/a>
AVAILABILITY<\/a> <\/p>\n

\n

NAME <\/a> <\/h2>\n

f2fs_io \u2212 f2fs ioctl utility<\/p>\n

DESCRIPTION <\/a> <\/h2>\n

f2fs_io<\/b> is used to send various commands to the f2fs file system for administrative purposes.<\/p>\n

AVAILABLE COMMANDS <\/a> <\/h2>\n

set_verity<\/b> [file]<\/i><\/p>\n

Set the verity flags associated with the specified file.<\/p>\n

getflags<\/b> [file]<\/i><\/p>\n

Get the flags associated with the specified file.<\/p>\n

setflags<\/b> [flag] [file]<\/i><\/p>\n

Set an f2fs file on specified file. The flag can be casefold, compression, and nocompression.<\/p>\n

shutdown<\/b> shutdown filesystem<\/i><\/p>\n

Freeze and stop all IOs for the file system mounted on dir.<\/i> The level parameter can be:<\/p>\n\n\n\n\n\n\n
<\/td>\n\n

0<\/p>\n<\/td>\n

<\/td>\n\n

going down with full sync<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n
<\/td>\n\n

1<\/p>\n<\/td>\n

<\/td>\n\n

going down with checkpoint only<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n
<\/td>\n\n

2<\/p>\n<\/td>\n

<\/td>\n\n

going down with no sync<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n
<\/td>\n\n

3<\/p>\n<\/td>\n

<\/td>\n\n

going down with metadata flush<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n
<\/td>\n\n

4<\/p>\n<\/td>\n

<\/td>\n\n

going down with fsck mark<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n<\/table>\n

pinfile<\/b> [get|set] [file]<\/i><\/p>\n

Get or set the pinning status on a file.<\/p>\n

fallocate<\/b> [keep_size] [offset] [length] [file]<\/i><\/p>\n

Request that space be allocated on a file. The keep_size<\/i> parameter can be either 1 or 0.<\/p>\n

write<\/b> [chunk_size in 4kb] [offset in chunk_size] [count] [pattern] [IO]
[file_path]<\/i><\/p>\n

Write a given pattern to file_path<\/i>. The pattern<\/i> parameter can be:<\/p>\n\n\n
<\/td>\n\n

zero<\/b><\/p>\n<\/td>\n

<\/td>\n\n

zeros<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n<\/table>\n

inc_num<\/b><\/p>\n

incrementing numbers<\/p>\n\n\n
<\/td>\n\n

rand<\/b><\/p>\n<\/td>\n

<\/td>\n\n

random numbers<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n<\/table>\n

The IO<\/i> parameter can be:<\/p>\n

buffered<\/b><\/p>\n

buffered I\/O<\/p>\n\n\n
<\/td>\n\n

dio<\/b><\/p>\n<\/td>\n

<\/td>\n\n

direct I\/O<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n<\/table>\n

read<\/b> [chunk_size in 4kb] [offset in chunk_size] [count] [IO]
[print_nbytes] [file_path]<\/i><\/p>\n

Read data in file_path<\/i> and print print_nbytes<\/i>. The IO<\/i> options can be:<\/p>\n

buffered<\/b><\/p>\n

buffered I\/O<\/p>\n\n\n
<\/td>\n\n

dio<\/b><\/p>\n<\/td>\n

<\/td>\n\n

direct I\/O<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n<\/table>\n

fiemap<\/b> [offset in 4kb] [count] [file_path]<\/i><\/p>\n

get block address in file<\/p>\n

gc_urgent<\/b> dev [start|end|run] [time in sec]<\/i><\/p>\n

Start, end, or run gc_urgent for a given time period<\/p>\n

defrag_file<\/b> [start] [length] [file_path]<\/i><\/p>\n

Defragment a file.<\/p>\n

copy<\/b> [-d] [-m] [-s] [src_path] [dst_path]<\/i><\/p>\n

Copy file from src_path to dst_path. The pattern<\/i> parameter can be:<\/p>\n\n\n\n\n
<\/td>\n\n

-d<\/b><\/p>\n<\/td>\n

<\/td>\n\n

use direct I\/O<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n
<\/td>\n\n

-m<\/b><\/p>\n<\/td>\n

<\/td>\n\n

use mmap for source file<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n
<\/td>\n\n

-s<\/b><\/p>\n<\/td>\n

<\/td>\n\n

use sendfile to transfer data<\/p>\n<\/td>\n

 <\/td>\n<\/tr>\n<\/table>\n

get_cblocks<\/b> [file]<\/i><\/p>\n

Get the number of compressed blocks.<\/p>\n

release_cblocks<\/b> [file]<\/i><\/p>\n

Release compressed blocks to get free space.<\/p>\n

reserve_cblocks<\/b> [file]<\/i><\/p>\n

Reserve free blocks to prepare decompressing blocks in the file.<\/p>\n

AUTHOR <\/a> <\/h2>\n

This version of f2fs_io<\/b> has been written by Jaegeuk Kim .<\/p>\n

AVAILABILITY <\/a> <\/h2>\n

f2fs_io<\/b> is available from git:\/\/git.kernel.org\/pub\/scm\/linux\/kernel\/git\/jaegeuk\/f2fs-tools.git.<\/p>\n

\n","protected":false},"excerpt":{"rendered":"

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