inject.f2fs(8)

NAME

inject.f2fs - inject a Linux F2FS file system

SYNOPSIS

inject.f2fs [ options ] device

DESCRIPTION

inject.f2fs is used to modify metadata or data (directory entry) of f2fs file system image offline flexibly.

OPTIONS

-d debug level [default:0]: Specify the level of debugging options.

-V: Print the version number and exit.

--mb member name: Specify the member name in a struct that is injected.

--val new value: New value to set if mb is a number.

--str new string: New string to set if mb is a string.

--idx slot index: Specify which slot is injected if mb is an array.

--nid nid: Specify which nid is injected.

--blk blkaddr: Specify which blkaddr is injected.

--sb 0 or 1 or 2

Inject super block, its argument means which sb pack is injected, where 0 choses the current valid sb automatically. The available mb of sb are:

magic: magic number.

s_stop_reason: s_stop_reason array.

s_errors: s_errors array.

feature: features.

devs.path: path in devs array.

--cp 0 or 1 or 2

Inject checkpoint, its argument means which cp pack is injected, where 0 choses the current valid cp automatically. The available mb of cp are:

checkpoint_ver: checkpoint version.

ckpt_flags: checkpoint flags.

cur_node_segno: cur_node_segno array.

cur_node_blkoff: cur_node_blkoff array.

cur_data_segno: cur_data_segno array.

cur_data_blkoff: cur_data_blkoff array.

next_blkaddr: fsync dnodes.

alloc_type: alloc_type array.

crc: crc checksum.

elapsed_time: elapsed mount time.

--nat 0 or 1 or 2

Inject nat entry specified by nid, its argument means which nat pack is injected, where 0 choses the current valid nat automatically. The available mb of nat are:

version: nat entry version.

ino: nat entry ino.

block_addr: nat entry block_addr.

--sit 0 or 1 or 2

Inject sit entry specified by blk, its argument means which sit pack is injected, where 0 choses the current valid sit automatically. The available mb of sit are:

vblocks: sit entry vblocks.

valid_map: sit entry valid_map.

mtime: sit entry mtime.

--ssa

Inject summary block or summary entry specified by blk. The available mb of ssa are:

entry_type: summary block footer entry_type.

check_sum: summary block footer check_sum.

nid: summary entry nid.

version: summary entry version.

ofs_in_node: summary entry ofs_in_node.

--node

Inject node block specified by nid. The available mb of node are:

nid: node footer nid.

ino: node footer ino.

flag: node footer flag.

cp_ver: node footer cp_ver.

next_blkaddr: node footer next_blkaddr.

i_mode: inode i_mode.

i_advise: inode i_advise.

i_inline: inode i_inline.

i_links: inode i_links.

i_size: inode i_size.

i_blocks: inode i_blocks.

i_xattr_nid: inode i_xattr_nid.

i_ext.fofs: inode i_ext.fofs.

i_ext.blk_addr: inode i_ext.blk_addr.

i_ext.len: inode i_ext.len.

i_extra_isize: inode i_extra_isize.

i_inline_xattr_size: inode i_inline_xattr_size.

i_inode_checksum: inode i_inode_checksum.

i_compr_blocks: inode i_compr_blocks.

i_addr: inode i_addr array specified by idx.

i_nid: inode i_nid array specified by idx.

addr: {in}direct node nid/addr array specified by idx.

--dent

Inject dentry block or dir entry specified by nid.

--dots 1 or 2: The option means the "." or ".." directory entry of nid is going to be injected.

The available mb of dent are:

d_bitmap: dentry block d_bitmap.

d_hash: dentry hash.

d_ino: dentry ino.

d_ftype: dentry ftype.

filename: dentry filename, and corresponding d_hash and namelen are updated implicitly.

--dry-run: Do not really inject.

AUTHOR

This version of inject.f2fs has been written by Sheng Yong <[email protected]>.

AVAILABILITY

inject.f2fs is available from git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-tools.git.