linux-stable.git/include/linux/f2fs_fs.h, branch v4.20.7

f2fs: guarantee journalled quota data by checkpoint

2018-10-23T00:54:47+00:00

For journalled quota mode, let checkpoint to flush dquot dirty data
and quota file data to guarntee persistence of all quota sysfile in
last checkpoint, by this way, we can avoid corrupting quota sysfile
when encountering SPO.

The implementation is as below:

1. add a global state SBI_QUOTA_NEED_FLUSH to indicate that there is
cached dquot metadata changes in quota subsystem, and later checkpoint
should:
 a) flush dquot metadata into quota file.
 b) flush quota file to storage to keep file usage be consistent.

2. add a global state SBI_QUOTA_NEED_REPAIR to indicate that quota
operation failed due to -EIO or -ENOSPC, so later,
 a) checkpoint will skip syncing dquot metadata.
 b) CP_QUOTA_NEED_FSCK_FLAG will be set in last cp pack to give a
    hint for fsck repairing.

3. add a global state SBI_QUOTA_SKIP_FLUSH, in checkpoint, if quota
data updating is very heavy, it may cause hungtask in block_operation().
To avoid this, if our retry time exceed threshold, let's just skip
flushing and retry in next checkpoint().

Signed-off-by: Weichao Guo 
Signed-off-by: Chao Yu 
[Jaegeuk Kim: avoid warnings and set fsck flag]
Signed-off-by: Jaegeuk Kim

f2fs: checkpoint disabling

2018-10-16T16:36:39+00:00

Note that, it requires "f2fs: return correct errno in f2fs_gc".

This adds a lightweight non-persistent snapshotting scheme to f2fs.

To use, mount with the option checkpoint=disable, and to return to
normal operation, remount with checkpoint=enable. If the filesystem
is shut down before remounting with checkpoint=enable, it will revert
back to its apparent state when it was first mounted with
checkpoint=disable. This is useful for situations where you wish to be
able to roll back the state of the disk in case of some critical
failure.

Signed-off-by: Daniel Rosenberg 
[Jaegeuk Kim: use SB_RDONLY instead of MS_RDONLY]
Signed-off-by: Jaegeuk Kim

f2fs: support superblock checksum

2018-10-01T01:34:18+00:00

Now we support crc32 checksum for superblock.

Reviewed-by: Chao Yu 
Signed-off-by: Junling Zheng 
Signed-off-by: Jaegeuk Kim

f2fs: add SPDX license identifiers

2018-09-12T20:07:10+00:00

Remove the verbose license text from f2fs files and replace them with
SPDX tags.  This does not change the license of any of the code.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: Allocate and stat mem used by free nid bitmap more accurately

2018-07-29T01:23:26+00:00

This patch used f2fs_bitmap_size macro to calculate mem used by
free nid bitmap, and stat used mem including aligned part.

Signed-off-by: Yunlei He 
Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: align memory boundary for bitops

2018-03-17T04:57:39+00:00

For example, in arm64, free_nid_bitmap should be aligned to word size in order
to use bit operations.

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: wrap all options with f2fs_sb_info.mount_opt

2018-03-17T04:57:30+00:00

This patch merges miscellaneous mount options into struct f2fs_mount_info,
After this patch, once we add new mount option, we don't need to worry
about recovery of it in remount_fs(), since we will recover the
f2fs_sb_info.mount_opt including all options.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: support hot file extension

2018-03-12T23:05:57+00:00

This patch supports to recognize hot file extension in f2fs, so that we
can allocate proper hot segment location for its data, which can lead to
better hot/cold seperation in filesystem.

In addition, we changes a bit on query/add/del operation method for
extension_list sysfs entry as below:

- Query: cat /sys/fs/f2fs//extension_list
- Add: echo 'extension' > /sys/fs/f2fs//extension_list
- Del: echo '!extension' > /sys/fs/f2fs//extension_list
- Add: echo '[h/c]extension' > /sys/fs/f2fs//extension_list
- Del: echo '[h/c]!extension' > /sys/fs/f2fs//extension_list
- [h] means add/del hot file extension
- [c] means add/del cold file extension

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: expose extension_list sysfs entry

2018-03-12T23:05:48+00:00

This patch adds a sysfs entry 'extension_list' to support
query/add/del item in extension list.

Query:
cat /sys/fs/f2fs//extension_list

Add:
echo 'extension' > /sys/fs/f2fs//extension_list

Del:
echo '!extension' > /sys/fs/f2fs//extension_list

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: support large nat bitmap

2018-03-12T23:05:33+00:00

Previously, we will store all nat version bitmap in checkpoint pack block,
so our total node entry number has a limitation which caused total node
number can not exceed (3900 * 8) block * 455 node/block = 14196000. So
that once user wants to create more nodes in large size image, it becomes
a bottleneck, that's unreasonable.

This patch detects the new layout of nat/sit version bitmap in image in
order to enable supporting large nat bitmap.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim