[PATCH 1/2] f2fs: stop checkpoint only from fault injection

[Jaegeuk Kim <jaegeuk@kernel.org>]

If we got EIO by block layer, we still can proceed since EIO can be recovered.
But, if we injected stop_checkpoint, we must stop everything.

This should fix generic/441 failure in xfstests.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/checkpoint.c | 16 ++++------------
 fs/f2fs/data.c       |  8 ++------
 fs/f2fs/f2fs.h       |  2 +-
 fs/f2fs/file.c       |  8 ++++----
 fs/f2fs/gc.c         |  2 +-
 fs/f2fs/inode.c      |  2 +-
 fs/f2fs/segment.c    |  2 +-
 7 files changed, 14 insertions(+), 26 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 14d2fedaf3ca..ce92243549dd 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -26,11 +26,10 @@
 static struct kmem_cache *ino_entry_slab;
 struct kmem_cache *inode_entry_slab;
 
-void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io)
+void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi)
 {
 	set_ckpt_flags(sbi, CP_ERROR_FLAG);
-	if (!end_io)
-		f2fs_flush_merged_writes(sbi);
+	f2fs_flush_merged_writes(sbi);
 }
 
 /*
@@ -89,18 +88,11 @@ static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
 	}
 
 	lock_page(page);
-	if (unlikely(page->mapping != mapping)) {
+	/* If there is any IO error when accessing device, let's try again. */
+	if (unlikely(page->mapping != mapping || !PageUptodate(page))) {
 		f2fs_put_page(page, 1);
 		goto repeat;
 	}
-
-	/*
-	 * if there is any IO error when accessing device, make our filesystem
-	 * readonly and make sure do not write checkpoint with non-uptodate
-	 * meta page.
-	 */
-	if (unlikely(!PageUptodate(page)))
-		f2fs_stop_checkpoint(sbi, false);
 out:
 	return page;
 }
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index b9fab6186f28..29523013c5a3 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -101,18 +101,14 @@ static void f2fs_write_end_io(struct bio *bio)
 			ClearPagePrivate(page);
 			unlock_page(page);
 			mempool_free(page, sbi->write_io_dummy);
-
-			if (unlikely(bio->bi_status))
-				f2fs_stop_checkpoint(sbi, true);
 			continue;
 		}
 
 		fscrypt_pullback_bio_page(&page, true);
 
-		if (unlikely(bio->bi_status)) {
+		if (unlikely(bio->bi_status))
 			mapping_set_error(page->mapping, -EIO);
-			f2fs_stop_checkpoint(sbi, true);
-		}
+
 		dec_page_count(sbi, type);
 		clear_cold_data(page);
 		end_page_writeback(page);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index b32eacf11270..f06fb7b332c7 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -2741,7 +2741,7 @@ int rw_hint_to_seg_type(enum rw_hint hint);
 /*
  * checkpoint.c
  */
-void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io);
+void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi);
 struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index);
 struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index);
 struct page *get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 66a51e9fbe83..7ccf3e7ff498 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1840,21 +1840,21 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
 	case F2FS_GOING_DOWN_FULLSYNC:
 		sb = freeze_bdev(sb->s_bdev);
 		if (sb && !IS_ERR(sb)) {
-			f2fs_stop_checkpoint(sbi, false);
+			f2fs_stop_checkpoint(sbi);
 			thaw_bdev(sb->s_bdev, sb);
 		}
 		break;
 	case F2FS_GOING_DOWN_METASYNC:
 		/* do checkpoint only */
 		f2fs_sync_fs(sb, 1);
-		f2fs_stop_checkpoint(sbi, false);
+		f2fs_stop_checkpoint(sbi);
 		break;
 	case F2FS_GOING_DOWN_NOSYNC:
-		f2fs_stop_checkpoint(sbi, false);
+		f2fs_stop_checkpoint(sbi);
 		break;
 	case F2FS_GOING_DOWN_METAFLUSH:
 		sync_meta_pages(sbi, META, LONG_MAX, FS_META_IO);
-		f2fs_stop_checkpoint(sbi, false);
+		f2fs_stop_checkpoint(sbi);
 		break;
 	default:
 		ret = -EINVAL;
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 9bffef153a12..538396ea4d29 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -56,7 +56,7 @@ static int gc_thread_func(void *data)
 #ifdef CONFIG_F2FS_FAULT_INJECTION
 		if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
 			f2fs_show_injection_info(FAULT_CHECKPOINT);
-			f2fs_stop_checkpoint(sbi, false);
+			f2fs_stop_checkpoint(sbi);
 		}
 #endif
 
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 234322889e65..daac3d142c2c 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -441,7 +441,7 @@ void update_inode_page(struct inode *inode)
 			cond_resched();
 			goto retry;
 		} else if (err != -ENOENT) {
-			f2fs_stop_checkpoint(sbi, false);
+			f2fs_stop_checkpoint(sbi);
 		}
 		return;
 	}
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index b03f65e5dfdc..890d483ad21e 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -454,7 +454,7 @@ void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
 #ifdef CONFIG_F2FS_FAULT_INJECTION
 	if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
 		f2fs_show_injection_info(FAULT_CHECKPOINT);
-		f2fs_stop_checkpoint(sbi, false);
+		f2fs_stop_checkpoint(sbi);
 	}
 #endif
 
-- 
2.15.0.531.g2ccb3012c9-goog