[PATCH 1/3] f2fs: fix to recover data written by dio

[PATCH 1/3] f2fs: fix to recover data written by dio

[Jaegeuk Kim]

If data are overwritten through dio, previous f2fs doesn't remain the fsync mark
due to no additional node writes.

Note that this patch should resolve the xfstests:311.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/data.c |  3 +++
 fs/f2fs/f2fs.h |  1 +
 fs/f2fs/node.c | 12 ++++++++++++
 3 files changed, 16 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 8c250a5..39fe7d7 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1041,6 +1041,9 @@ static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb,
 	if (check_direct_IO(inode, rw, iov, offset, nr_segs))
 		return 0;
 
+	/* clear fsync mark to recover these blocks */
+	fsync_mark_clear(F2FS_SB(inode->i_sb), inode->i_ino);
+
 	return blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
 							get_data_block);
 }
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 9684b1f..f628c3c 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1168,6 +1168,7 @@ struct node_info;
 bool available_free_memory(struct f2fs_sb_info *, int);
 int is_checkpointed_node(struct f2fs_sb_info *, nid_t);
 bool fsync_mark_done(struct f2fs_sb_info *, nid_t);
+void fsync_mark_clear(struct f2fs_sb_info *, nid_t);
 void get_node_info(struct f2fs_sb_info *, nid_t, struct node_info *);
 int get_dnode_of_data(struct dnode_of_data *, pgoff_t, int);
 int truncate_inode_blocks(struct inode *, pgoff_t);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 02a59e9..a0a1f25 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -153,6 +153,18 @@ bool fsync_mark_done(struct f2fs_sb_info *sbi, nid_t nid)
 	return fsync_done;
 }
 
+void fsync_mark_clear(struct f2fs_sb_info *sbi, nid_t nid)
+{
+	struct f2fs_nm_info *nm_i = NM_I(sbi);
+	struct nat_entry *e;
+
+	write_lock(&nm_i->nat_tree_lock);
+	e = __lookup_nat_cache(nm_i, nid);
+	if (e)
+		e->fsync_done = false;
+	write_unlock(&nm_i->nat_tree_lock);
+}
+
 static struct nat_entry *grab_nat_entry(struct f2fs_nm_info *nm_i, nid_t nid)
 {
 	struct nat_entry *new;
-- 
1.8.5.2 (Apple Git-48)

[PATCH 2/3] f2fs: recover fallocated space

[Jaegeuk Kim]

If a fallocated file is fsynced, we should recover the i_size after sudden
power cut.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/file.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index d97e5c4..78110da 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -682,6 +682,7 @@ static int expand_inode_data(struct inode *inode, loff_t offset,
 		i_size_read(inode) < new_size) {
 		i_size_write(inode, new_size);
 		mark_inode_dirty(inode);
+		f2fs_write_inode(inode, NULL);
 	}
 
 	return ret;
-- 
1.8.5.2 (Apple Git-48)

[PATCH 3/3] f2fs: avoid not to call remove_dirty_inode

[Jaegeuk Kim]

There is an errorneous case during the recovery like below.

In recovery_dentry,
 1) dir = f2fs_iget();
 2) mark the dir with FI_DELAY_IPUT
 3) goto unmap_out

After the end of recovery routine, there is no dirty dentries so the dir cannot
be released by iput in remove_dirty_dir_inode.

This patch fixes such the bug case by handling the iget and iput in the
recovery_dentry procedure.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/recovery.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index e950a2f..a112368 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -52,20 +52,13 @@ static int recover_dentry(struct page *ipage, struct inode *inode)
 		goto out;
 	}
 
-	if (is_inode_flag_set(F2FS_I(dir), FI_DIRTY_DIR)) {
-		iput(dir);
-	} else {
-		add_dirty_dir_inode(dir);
-		set_inode_flag(F2FS_I(dir), FI_DELAY_IPUT);
-	}
-
 	name.len = le32_to_cpu(raw_inode->i_namelen);
 	name.name = raw_inode->i_name;
 
 	if (unlikely(name.len > F2FS_NAME_LEN)) {
 		WARN_ON(1);
 		err = -ENAMETOOLONG;
-		goto out;
+		goto out_err;
 	}
 retry:
 	de = f2fs_find_entry(dir, &name, &page);
@@ -90,11 +83,23 @@ retry:
 		goto retry;
 	}
 	err = __f2fs_add_link(dir, &name, inode);
+	if (err)
+		goto out_err;
+
+	if (is_inode_flag_set(F2FS_I(dir), FI_DELAY_IPUT)) {
+		iput(dir);
+	} else {
+		add_dirty_dir_inode(dir);
+		set_inode_flag(F2FS_I(dir), FI_DELAY_IPUT);
+	}
+
 	goto out;
 
 out_unmap_put:
 	kunmap(page);
 	f2fs_put_page(page, 0);
+out_err:
+	iput(dir);
 out:
 	f2fs_msg(inode->i_sb, KERN_NOTICE,
 			"%s: ino = %x, name = %s, dir = %lx, err = %d",
-- 
1.8.5.2 (Apple Git-48)