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f2fs: add quick mode of checkpoint=disable for QA 

This mode returns mount() quickly with EAGAIN. We can trigger this by
shutdown(F2FS_GOING_DOWN_NEED_FSCK).

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2019-01-24 17:48:38 -08:00
parent 03f2c02d8b
commit db610a640e
6 changed files with 19 additions and 3 deletions
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5
fs/f2fs/checkpoint.c
View File

@ -1259,6 +1259,11 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
else
__clear_ckpt_flags(ckpt, CP_DISABLED_FLAG);
if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK))
__set_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
else
__clear_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH))
__set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
else

2
fs/f2fs/f2fs.h
View File

@ -191,6 +191,7 @@ enum {
#define DEF_CP_INTERVAL 60 /* 60 secs */
#define DEF_IDLE_INTERVAL 5 /* 5 secs */
#define DEF_DISABLE_INTERVAL 5 /* 5 secs */
#define DEF_DISABLE_QUICK_INTERVAL 1 /* 1 secs */
#define DEF_UMOUNT_DISCARD_TIMEOUT 5 /* 5 secs */
struct cp_control {
@ -1101,6 +1102,7 @@ enum {
SBI_IS_SHUTDOWN, /* shutdown by ioctl */
SBI_IS_RECOVERED, /* recovered orphan/data */
SBI_CP_DISABLED, /* CP was disabled last mount */
SBI_CP_DISABLED_QUICK, /* CP was disabled quickly */
SBI_QUOTA_NEED_FLUSH, /* need to flush quota info in CP */
SBI_QUOTA_SKIP_FLUSH, /* skip flushing quota in current CP */
SBI_QUOTA_NEED_REPAIR, /* quota file may be corrupted */

6
fs/f2fs/file.c
View File

@ -1972,11 +1972,11 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
break;
case F2FS_GOING_DOWN_NEED_FSCK:
set_sbi_flag(sbi, SBI_NEED_FSCK);
set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
set_sbi_flag(sbi, SBI_IS_DIRTY);
/* do checkpoint only */
ret = f2fs_sync_fs(sb, 1);
if (ret)
goto out;
break;
goto out;
default:
ret = -EINVAL;
goto out;

3
fs/f2fs/segment.c
View File

@ -868,6 +868,9 @@ int f2fs_disable_cp_again(struct f2fs_sb_info *sbi)
if (holes[DATA] > ovp || holes[NODE] > ovp)
return -EAGAIN;
if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK) &&
dirty_segments(sbi) > overprovision_segments(sbi))
return -EAGAIN;
return 0;
}

5
fs/f2fs/super.c
View File

@ -3205,6 +3205,10 @@ try_onemore:
if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
}
/* Initialize device list */
err = f2fs_scan_devices(sbi);
@ -3392,6 +3396,7 @@ skip_recovery:
cur_cp_version(F2FS_CKPT(sbi)));
f2fs_update_time(sbi, CP_TIME);
f2fs_update_time(sbi, REQ_TIME);
clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
return 0;
free_meta:

1
include/linux/f2fs_fs.h
View File

@ -116,6 +116,7 @@ struct f2fs_super_block {
/*
* For checkpoint
*/
#define CP_DISABLED_QUICK_FLAG 0x00002000
#define CP_DISABLED_FLAG 0x00001000
#define CP_QUOTA_NEED_FSCK_FLAG 0x00000800
#define CP_LARGE_NAT_BITMAP_FLAG 0x00000400