If we use regular file instead block device, let's reclaim its free
space.
Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
The compile time option BLKDISCARD conflicts with ioctl code
for discard. This causes discard to fail with "Info: This
device doesn't support TRIM". Rename compile time option
to WITH_BLKDISCARD.
Signed-off-by: Sankalp Bose <sankalp@tuxera.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This tool prints /sys/kernel/debug/f2fs/status in sec so that we
can monitor variation of f2fs status.
Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
fsck.f2fs checks file system consistency, but does not repair a broken
file system yet.
dump.f2fs shows the information of a specific inode and makes dump file
of SSA and SIT.
f2fs checks file system consistency as follows:
o When data about used area and its metadata are identical,
f2fs is considered consistent. To verify such consistency, we use
three bitmaps: nat_area_bitmap, sit_area_bitmap, and main_area_bitmap.
First, each bit in nat_area_bitmap corresponds to a nid in NAT.
Second, each bit in sit_area_bitmap corresponds to a valid block in a
segment. This bitmap is same to the total valid_map of f2fs_sit_entries
in SIT.
Last, each bit in main_area_bitmap corresponds to a block in main area
except meta area.
After a consistency check of each block, we set or clear the
corresponding bit of each bitmap.
From the root node, we start consistency check. The verified
information varies according to block type.
1. NODE
- Read information of node block from NAT
- Check if block address is allocated using node info.
- Check if the type of f2fs_summary related to nid in SSA is NODE.
- Update the corresponding bit in nat_area_bitmap.
- Update the corresponding bit in sit_area_bitmap.
- Set the corresponding bit in main_area_bitmap to 1.
- Then, read node block. According to its attribute, explore
inode/direct node/indirect node/double indirect node
recursively.
- If it is an inode block, we also check its xattr and hard link.
2. DATA
- Check if the type of f2fs_summary related to nid in SSA is DATA.
- Set the corresponding bits of sit_area_bitmap and
main_area_bitmap to visited
- If it is a dentry block, traverse each dentries that may be
regular
file or directory. At this time, it will check inode block again.
Finally, we verify whether
- every nat_area_bitmap is visited
- any unreachable hard link exists
- values of sit_area_bitmap and main_area_bitmap are identical
- total_valid_block_count/node_count/inode_count are correct
Usage:
o fsck.f2fs
# fsck.f2fs /dev/sdx
options:
-d debug level [default:0]
o dump.f2fs
# dump.f2fs -i [ino] /dev/sdx
# dump.f2fs -s 0~-1 /dev/sdx (SIT dump)
# dump.f2fs -a 0~-1 /dev/sdx (SSA dump)
options:
-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]
Note: To use dump.f2fs, please run make install or ln -s fsck.f2fs
dump.f2fs
Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Byoung Geun Kim <bgbg.kim@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Use "foreign", so that we are not forced to have all files GNU
requires. It also gets us rid of the INSTALL boilerplate.
Use tar-pax dist-xz to select a modern compression scheme.
Signed-off-by: Jan Engelhardt <jengelh@inai.de>
Place most of the autogenerated files in a separate directory that can
be ignored wholesale, thereby reducing files in the top-level
directory.
Signed-off-by: Jan Engelhardt <jengelh@inai.de>
Patch 1:
Now we have two different versions that produce different superblocks/
filesystems with the same version info. Major/minor version in the sb
should reflect the version of the tool creating the filesystem. This
patch will ensure that the version entered in the file VERSION will
be used consistently throughout the code.
Patch 2:
In order to simplify the maintenance with a new release the date
in F2FS_TOOLS_DATE is now take from the last commit in git. Thus,
git is needed to run autoconf. However, git is not needed for the
simple build procedure, ./configure && make, that should be the
only things needed to build the tool from a tar.gz package.
Pros & Cons:
[+] Automated
[+] True
[-] Git needed to run autoreconf
Change log by Jaegeuk from the initial patch-set:
- Merge two patches into one
: Eliminate the intermediate state having version.h and VERSION.
- Remove the Git dependency which is one of Cons
: If there is no git tree, just use DATE described in VERSION.
- Minor coding style
Pros & Cons:
[+] Automated
[+] True
[+] No Git dependency
Signed-off-by: Sven-Göran Bergh <sgb@systemasis.org>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
"Usually, it is used 128-bits UUID for serial number. Why do you use
__le32 as volume_serial_number?"
>From Vyacheslav Dubeyko.
I added an uuid facility for the serial number.
And sync with kernel/include/linux/f2fs_fs.h.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
