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f2fs: add description for fsck.f2fs and dump.f2fs

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This patch adds some description on fsck.f2fs and dump.f2fs which is
recently merged into f2fs-tools.

Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Changman Lee 2013-07-04 17:12:47 +09:00 committed by Jaegeuk Kim
parent e5d2385ed6
commit d51a7fba25
1 changed files with 39 additions and 4 deletions
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43
Documentation/filesystems/f2fs.txt
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@ -18,8 +18,8 @@ according to its internal geometry or flash memory management scheme, namely FTL
F2FS and its tools support various parameters not only for configuring on-disk
layout, but also for selecting allocation and cleaning algorithms.
The file system formatting tool, "mkfs.f2fs", is available from the following
git tree:
The following git tree provides the file system formatting tool (mkfs.f2fs),
a consistency checking tool (fsck.f2fs), and a debugging tool (dump.f2fs).
>> git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-tools.git
For reporting bugs and sending patches, please use the following mailing list:
@ -149,8 +149,12 @@ USAGE
# mkfs.f2fs -l label /dev/block_device
# mount -t f2fs /dev/block_device /mnt/f2fs
Format options
--------------
mkfs.f2fs
---------
The mkfs.f2fs is for the use of formatting a partition as the f2fs filesystem,
which builds a basic on-disk layout.
The options consist of:
-l [label] : Give a volume label, up to 512 unicode name.
-a [0 or 1] : Split start location of each area for heap-based allocation.
1 is set by default, which performs this.
@ -164,6 +168,37 @@ Format options
-t [0 or 1] : Disable discard command or not.
1 is set by default, which conducts discard.
fsck.f2fs
---------
The fsck.f2fs is a tool to check the consistency of an f2fs-formatted
partition, which examines whether the filesystem metadata and user-made data
are cross-referenced correctly or not.
Note that, initial version of the tool does not fix any inconsistency.
The options consist of:
-d debug level [default:0]
dump.f2fs
---------
The dump.f2fs shows the information of specific inode and dumps SSA and SIT to
file. Each file is dump_ssa and dump_sit.
The dump.f2fs is used to debug on-disk data structures of the f2fs filesystem.
It shows on-disk inode information reconized by a given inode number, and is
able to dump all the SSA and SIT entries into predefined files, ./dump_ssa and
./dump_sit respectively.
The options consist of:
-d debug level [default:0]
-i inode no (hex)
-s [SIT dump segno from #1~#2 (decimal), for all 0~-1]
-a [SSA dump segno from #1~#2 (decimal), for all 0~-1]
Examples:
# dump.f2fs -i [ino] /dev/sdx
# dump.f2fs -s 0~-1 /dev/sdx (SIT dump)
# dump.f2fs -a 0~-1 /dev/sdx (SSA dump)
================================================================================
DESIGN
================================================================================