linux.git/fs/f2fs/segment.c, branch v4.9

f2fs: support checkpoint error injection

2016-10-01T00:34:35+00:00

This patch adds to support checkpoint error injection in f2fs for testing
fatal error tolerance, it will be useful that it can simulate abnormal
power off by f2fs itself instead of calling godown ioctl by running apps.

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

f2fs: remove redundant value definition

2016-10-01T00:34:32+00:00

This patch remove redundant value definition in build_sit_entries

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

f2fs: introduce cp_lock to protect updating of ckpt_flags

2016-10-01T00:34:20+00:00

This patch introduces spinlock to protect updating process of ckpt_flags
field in struct f2fs_checkpoint, it avoids incorrectly updating in race
condition.

Signed-off-by: Chao Yu 
[Jaegeuk Kim: add __is_set_ckpt_flags likewise __set_ckpt_flags]
Signed-off-by: Jaegeuk Kim

f2fs: use crc and cp version to determine roll-forward recovery

2016-09-30T17:05:46+00:00

Previously, we used cp_version only to detect recoverable dnodes.
In order to avoid same garbage cp_version, we needed to truncate the next
dnode during checkpoint, resulting in additional discard or data write.
If we can distinguish this by using crc in addition to cp_version, we can
remove this overhead.

There is backward compatibility concern where it changes node_footer layout.
So, this patch introduces a new checkpoint flag, CP_CRC_RECOVERY_FLAG, to
detect new layout. New layout will be activated only when this flag is set.

Signed-off-by: Jaegeuk Kim

f2fs: preallocate blocks for encrypted file

2016-09-22T18:43:08+00:00

This patch allow preallocates data blocks for buffered aio writes
in encrypted file.

Signed-off-by: Yunlei He 
Reviewed-by: Chao Yu 
[Jaegeuk Kim: fix to avoid BUG_ON]
Signed-off-by: Jaegeuk Kim

f2fs: check free_sections for defragmentation

2016-09-12T17:30:41+00:00

Fix wrong condition check for defragmentation of a file.

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

f2fs: forbid to do fstrim if fs has some error

2016-09-12T17:30:40+00:00

This patch skip fstrim if sbi set SBI_NEED_FSCK flag

Signed-off-by: Yunlei He 
Signed-off-by: Jaegeuk Kim

f2fs: fix minor typo

2016-09-08T01:53:48+00:00

Correct typo from 'destory' to 'destroy'.

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

f2fs: support async discard

2016-09-08T00:27:38+00:00

Like most filesystems, f2fs will issue discard command synchronously, so
when user trigger fstrim through ioctl, multiple discard commands will be
issued serially with sync mode, which makes poor performance.

In this patch we try to support async discard, so that all discard
commands can be issued and be waited for endio in batch to improve
performance.

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

f2fs: schedule in between two continous batch discards

2016-09-08T00:27:33+00:00

In batch discard approach of fstrim will grab/release gc_mutex lock
repeatly, it makes contention of the lock becoming more intensive.

So after one batch discards were issued in checkpoint and the lock
was released, it's better to do schedule() to increase opportunity
of grabbing gc_mutex lock for other competitors.

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