linux-kernel - [PATCH 2/3] f2fs: handle error cases in move_encrypted

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Date:	Wed, 15 Jul 2015 15:38:11 -0700
From:	Jaegeuk Kim <jaegeuk@...nel.org>
To:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Cc:	Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH 2/3] f2fs: handle error cases in move_encrypted_block

This patch fixes some missing error handlers.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/gc.c | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 93aff5b..22007ad 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -559,27 +559,34 @@ static void move_encrypted_block(struct inode *inode, block_t bidx)
 	if (!fio.encrypted_page)
 		goto put_out;
 
-	f2fs_submit_page_bio(&fio);
+	err = f2fs_submit_page_bio(&fio);
+	if (err)
+		goto put_page_out;
+
+	/* write page */
+	lock_page(fio.encrypted_page);
+
+	if (unlikely(!PageUptodate(fio.encrypted_page)))
+		goto put_page_out;
+	if (unlikely(fio.encrypted_page->mapping != META_MAPPING(fio.sbi)))
+		goto put_page_out;
+
+	set_page_writeback(fio.encrypted_page);
 
 	/* allocate block address */
 	f2fs_wait_on_page_writeback(dn.node_page, NODE);
-
 	allocate_data_block(fio.sbi, NULL, fio.blk_addr,
 					&fio.blk_addr, &sum, CURSEG_COLD_DATA);
-	dn.data_blkaddr = fio.blk_addr;
-
-	/* write page */
-	lock_page(fio.encrypted_page);
-	set_page_writeback(fio.encrypted_page);
 	fio.rw = WRITE_SYNC;
 	f2fs_submit_page_mbio(&fio);
 
+	dn.data_blkaddr = fio.blk_addr;
 	set_data_blkaddr(&dn);
 	f2fs_update_extent_cache(&dn);
 	set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE);
 	if (page->index == 0)
 		set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN);
-
+put_page_out:
 	f2fs_put_page(fio.encrypted_page, 1);
 put_out:
 	f2fs_put_dnode(&dn);
-- 
2.1.1

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