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Diffstat (limited to 'Documentation/filesystems/f2fs.txt')
| -rw-r--r-- | Documentation/filesystems/f2fs.txt | 43 |
1 files changed, 39 insertions, 4 deletions
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt index b91e2f26b67..0500c198cd0 100644 --- a/Documentation/filesystems/f2fs.txt +++ b/Documentation/filesystems/f2fs.txt @@ -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 ================================================================================ |