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f2fs: do not recover from previous remained wrong dnodes 

If device does not support discard, some obsolete dnodes can be recovered
by roll-forward. This patch enhances the recovery flow.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-12-03 14:14:40 -08:00
parent 760de7914e
commit 807b1e1c8e
1 changed files with 30 additions and 1 deletions
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31
fs/f2fs/recovery.c
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@ -168,6 +168,32 @@ 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)
{
unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi));
@ -197,7 +223,10 @@ 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 (entry) {
if (!is_same_inode(entry->inode, page))
goto next;
} else {
if (IS_INODE(page) && is_dent_dnode(page)) {
err = recover_inode_page(sbi, page);
if (err)