linux-kernel - [PATCH 2/2] f2fs: don't skip recovering inode depend on i

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Date:   Fri,  4 Nov 2016 00:26:56 +0800
From:   Chao Yu <chao@...nel.org>
To:     jaegeuk@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, yuchao0@...wei.com,
        liushuoran@...wei.com
Subject: [PATCH 2/2] f2fs: don't skip recovering inode depend on i_times

From: Chao Yu <yuchao0@...wei.com>

i_times of inode will be set with current system time which can be
configured through 'date', so it's not safe to judge dnode block as
garbage data depend on i_times.

Now, we have used enhanced 'cp_ver + cp' crc method to verify valid
dnode block, so I expect recoverying invalid dnode is almost not
possible.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fs/f2fs/recovery.c | 31 +------------------------------
 1 file changed, 1 insertion(+), 30 deletions(-)

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index d2ba4da..62523b2 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -196,32 +196,6 @@ static void recover_inode(struct inode *inode, struct page *page)
 			ino_of_node(page), name);
 }
 
-static bool is_same_inode(struct inode *inode, struct page *ipage)
-{
-	struct f2fs_inode *ri = F2FS_INODE(ipage);
-	struct timespec disk;
-
-	if (!IS_INODE(ipage))
-		return true;
-
-	disk.tv_sec = le64_to_cpu(ri->i_ctime);
-	disk.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
-	if (timespec_compare(&inode->i_ctime, &disk) > 0)
-		return false;
-
-	disk.tv_sec = le64_to_cpu(ri->i_atime);
-	disk.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
-	if (timespec_compare(&inode->i_atime, &disk) > 0)
-		return false;
-
-	disk.tv_sec = le64_to_cpu(ri->i_mtime);
-	disk.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
-	if (timespec_compare(&inode->i_mtime, &disk) > 0)
-		return false;
-
-	return true;
-}
-
 static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
 {
 	struct curseg_info *curseg;
@@ -248,10 +222,7 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head)
 			goto next;
 
 		entry = get_fsync_inode(head, ino_of_node(page));
-		if (entry) {
-			if (!is_same_inode(entry->inode, page))
-				goto next;
-		} else {
+		if (!entry) {
 			if (IS_INODE(page) && is_dent_dnode(page)) {
 				err = recover_inode_page(sbi, page);
 				if (err)
-- 
2.10.1