node_footer
memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
#define VALID_XATTR_BLOCK_SIZE (PAGE_SIZE - sizeof(struct node_footer))
- sizeof(struct node_footer)) / sizeof(__le32))
#define DEF_ADDRS_PER_BLOCK ((F2FS_BLKSIZE - sizeof(struct node_footer)) / sizeof(__le32))
#define NIDS_PER_BLOCK ((F2FS_BLKSIZE - sizeof(struct node_footer)) / sizeof(__le32))
struct node_footer footer;