linux.git/fs/f2fs/sysfs.c, branch v4.17

f2fs: introduce F2FS_FEATURE_LOST_FOUND feature

2018-03-17T05:02:47+00:00

This patch introduces a new feature, F2FS_FEATURE_LOST_FOUND, which
is set by mkfs. mkfs creates a directory named lost+found, which saves
unreachable files. If fsck finds a file which has no parent, or its
parent is removed by fsck, the file will be placed under lost+found
directory by fsck.

lost+found directory could not be encrypted. As a result, the root
directory cannot be encrypted too. So if LOST_FOUND feature is enabled,
let's avoid to encrypt root directory.

Signed-off-by: Sheng Yong 
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: clean up f2fs_sb_has_xxx functions

2018-03-12T23:05:42+00:00

This patch introduces F2FS_FEATURE_FUNCS to clean up the definitions of
different f2fs_sb_has_xxx functions.

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

f2fs: support inode creation time

2018-01-25T22:10:39+00:00

This patch adds creation time field in inode layout to support showing
kstat.btime in ->statx.

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

f2fs: add an ioctl to disable GC for specific file

2018-01-22T22:56:35+00:00

This patch gives a flag to disable GC on given file, which would be useful, when
user wants to keep its block map. It also conducts in-place-update for dontmove
file.

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

f2fs: add reserved blocks for root user

2018-01-16T23:39:58+00:00

This patch allows root to reserve some blocks via mount option.

"-o reserve_root=N" means N x 4KB-sized blocks for root only.

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

f2fs: introduce sysfs readdir_ra to readahead inode block in readdir

2018-01-03T03:27:27+00:00

This patch introduces a sysfs interface readdir_ra to enable/disable
readaheading inode block in f2fs_readdir. When readdir_ra is enabled,
it improves the performance of "readdir + stat".

For 300,000 files:
	time find /data/test > /dev/null
disable readdir_ra: 1m25.69s real  0m01.94s user  0m50.80s system
enable  readdir_ra: 0m18.55s real  0m00.44s user  0m15.39s system

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

f2fs: add quota_ino feature infra

2017-11-06T00:42:01+00:00

This patch adds quota_ino feature infra to be used for quota files.

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