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>

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index f955cd3..622dca7 100644 (file)
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -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

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 6b6ec56..fe95abb 100644 (file)
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -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 */

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0d46132..fe6f92f 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -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;

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 5b2b9be..342b720 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -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;
 }
 

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 24efd76..5e1f857 100644 (file)
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -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:

diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index d771104..d6befe1 100644 (file)
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -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