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void f2fs_set_inode_flags(struct inode *inode); bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page); void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page); +int f2fs_inode_chksum_get(struct f2fs_sb_info *sbi, struct inode *inode, + u32 *chksum); struct inode *f2fs_iget(struct super_block *sb, unsigned long ino); struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino); int f2fs_try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink); diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index 1e49009831c12..098d1ee72bfcb 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -204,6 +204,27 @@ void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page) ri->i_inode_checksum = cpu_to_le32(f2fs_inode_chksum(sbi, page)); } +int f2fs_inode_chksum_get(struct f2fs_sb_info *sbi, + struct inode *inode, u32 *chksum) +{ + struct page *ipage; + struct f2fs_inode_info *fi = F2FS_I(inode); + struct f2fs_inode *ri; + + if (!f2fs_sb_has_inode_chksum(sbi) || + !f2fs_has_extra_attr(inode) || + !F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_inode_checksum)) + return -EOPNOTSUPP; + + ipage = f2fs_get_node_page(sbi, inode->i_ino); + if (IS_ERR(ipage)) + return PTR_ERR(ipage); + + *chksum = f2fs_inode_chksum(sbi, ipage); + f2fs_put_page(ipage, true); + return 0; +} + static bool sanity_check_compress_inode(struct inode *inode, struct f2fs_inode *ri) { -- 2.40.1