From 4356e48e64374ceac6e4313244eb65158a954b40 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Tue, 23 Feb 2016 17:52:43 +0800 Subject: f2fs crypto: fix incorrect positioning for GCing encrypted data page For now, flow of GCing an encrypted data page: 1) try to grab meta page in meta inode's mapping with index of old block address of that data page 2) load data of ciphertext into meta page 3) allocate new block address 4) write the meta page into new block address 5) update block address pointer in direct node page. Other reader/writer will use f2fs_wait_on_encrypted_page_writeback to check and wait on GCed encrypted data cached in meta page writebacked in order to avoid inconsistence among data page cache, meta page cache and data on-disk when updating. However, we will use new block address updated in step 5) as an index to lookup meta page in inner bio buffer. That would be wrong, and we will never find the GCing meta page, since we use the old block address as index of that page in step 1). This patch fixes the issue by adjust the order of step 1) and step 3), and in step 1) grab page with index generated in step 3). Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/f2fs.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/f2fs/f2fs.h') diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index da8d99d4091e..35b34f656eed 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1855,6 +1855,8 @@ void write_meta_page(struct f2fs_sb_info *, struct page *); void write_node_page(unsigned int, struct f2fs_io_info *); void write_data_page(struct dnode_of_data *, struct f2fs_io_info *); void rewrite_data_page(struct f2fs_io_info *); +void __f2fs_replace_block(struct f2fs_sb_info *, struct f2fs_summary *, + block_t, block_t, bool, bool); void f2fs_replace_block(struct f2fs_sb_info *, struct dnode_of_data *, block_t, block_t, unsigned char, bool, bool); void allocate_data_block(struct f2fs_sb_info *, struct page *, -- cgit v1.2.3