From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Tue, 11 Nov 2014 22:10:01 +0000 (-0800)
Subject: f2fs: convert inline_data when i_size becomes large
X-Git-Tag: firefly_0821_release~176^2~2738^2~35
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=92dffd01790a5219d234fc83c3ba854f4490b7f4;p=firefly-linux-kernel-4.4.55.git

f2fs: convert inline_data when i_size becomes large

If i_size becomes large outside of MAX_INLINE_DATA, we shoud convert the inode.
Otherwise, we can make some dirty pages during the truncation, and those pages
will be written through f2fs_write_data_page.
At that moment, the inode has still inline_data, so that it tries to write non-
zero pages into inline_data area.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index edc3ce867e9c..7c2ec3ebebe0 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -522,6 +522,12 @@ void f2fs_truncate(struct inode *inode)
 
 	trace_f2fs_truncate(inode);
 
+	/* we should check inline_data size */
+	if (f2fs_has_inline_data(inode) && !f2fs_may_inline(inode)) {
+		if (f2fs_convert_inline_inode(inode))
+			return;
+	}
+
 	if (!truncate_blocks(inode, i_size_read(inode), true)) {
 		inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 		mark_inode_dirty(inode);
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 231067027745..053d114f0528 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -24,6 +24,9 @@ bool f2fs_may_inline(struct inode *inode)
 	if (!S_ISREG(inode->i_mode))
 		return false;
 
+	if (i_size_read(inode) > MAX_INLINE_DATA)
+		return false;
+
 	return true;
 }