f2fs-tools: Refactor f2fs_node struct and friends

This converts inodes, direct nodes, and indirect nodes over to not being
based on a 4K page size. f2fs_inode's i_nids field should now be
accessed via a macro, as it's location depends on block size.

Access to direct nodes and indirect nodes is unchanged.

The node footer's location is also based on block sized, and accessed
via a macro. With these changes, you should use F2FS_BLKSIZE in place of
sizeof(struct f2fs_node)

Signed-off-by: Daniel Rosenberg <drosen@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

10 files changed, 121 insertions, 97 deletions

diff --git a/fsck/dir.c b/fsck/dir.c
index 33f83ee..64beaad 100644
--- a/fsck/dir.c
+++ b/fsck/dir.c
@@ -116,7 +116,7 @@ static int find_in_level(struct f2fs_sb_info *sbi, struct f2fs_node *dir,
 	struct dnode_of_data dn;
 	void *dentry_blk;
 	int max_slots = 214;
-	nid_t ino = le32_to_cpu(dir->footer.ino);
+	nid_t ino = le32_to_cpu(F2FS_NODE_FOOTER(dir)->ino);
 	f2fs_hash_t namehash;
 	unsigned int dir_level = dir->i.i_dir_level;
 	int ret = 0;
@@ -239,7 +239,7 @@ int f2fs_add_link(struct f2fs_sb_info *sbi, struct f2fs_node *parent,
 	dentry_hash = f2fs_dentry_hash(get_encoding(sbi),
 						IS_CASEFOLDED(&parent->i),
 						name, name_len);
-	pino = le32_to_cpu(parent->footer.ino);
+	pino = le32_to_cpu(F2FS_NODE_FOOTER(parent)->ino);
 	dir_level = parent->i.i_dir_level;
 
 	if (!pino) {
@@ -340,7 +340,7 @@ add_dentry:
 static void make_empty_dir(struct f2fs_sb_info *sbi, struct f2fs_node *inode)
 {
 	struct f2fs_dentry_block *dent_blk;
-	nid_t ino = le32_to_cpu(inode->footer.ino);
+	nid_t ino = le32_to_cpu(F2FS_NODE_FOOTER(inode)->ino);
 	nid_t pino = le32_to_cpu(inode->i.i_pino);
 	struct f2fs_summary sum;
 	struct node_info ni;
@@ -381,7 +381,7 @@ static void make_empty_dir(struct f2fs_sb_info *sbi, struct f2fs_node *inode)
 static void page_symlink(struct f2fs_sb_info *sbi, struct f2fs_node *inode,
 					const char *symname, int symlen)
 {
-	nid_t ino = le32_to_cpu(inode->footer.ino);
+	nid_t ino = le32_to_cpu(F2FS_NODE_FOOTER(inode)->ino);
 	struct f2fs_summary sum;
 	struct node_info ni;
 	char *data_blk;
@@ -531,10 +531,10 @@ static void init_inode_block(struct f2fs_sb_info *sbi,
 
 	set_file_temperature(sbi, node_blk, de->name);
 
-	node_blk->footer.ino = cpu_to_le32(de->ino);
-	node_blk->footer.nid = cpu_to_le32(de->ino);
-	node_blk->footer.flag = 0;
-	node_blk->footer.cp_ver = ckpt->checkpoint_ver;
+	F2FS_NODE_FOOTER(node_blk)->ino = cpu_to_le32(de->ino);
+	F2FS_NODE_FOOTER(node_blk)->nid = cpu_to_le32(de->ino);
+	F2FS_NODE_FOOTER(node_blk)->flag = 0;
+	F2FS_NODE_FOOTER(node_blk)->cp_ver = ckpt->checkpoint_ver;
 	set_cold_node(node_blk, S_ISDIR(mode));
 
 	if (S_ISDIR(mode)) {
@@ -556,7 +556,7 @@ int convert_inline_dentry(struct f2fs_sb_info *sbi, struct f2fs_node *node,
 {
 	struct f2fs_inode *inode = &(node->i);
 	unsigned int dir_level = node->i.i_dir_level;
-	nid_t ino = le32_to_cpu(node->footer.ino);
+	nid_t ino = le32_to_cpu(F2FS_NODE_FOOTER(node)->ino);
 	char inline_data[MAX_INLINE_DATA(node)];
 	struct dnode_of_data dn;
 	struct f2fs_dentry_ptr d;
@@ -751,7 +751,7 @@ int f2fs_create(struct f2fs_sb_info *sbi, struct dentry *de)
 
 	ret = f2fs_add_link(sbi, parent, child->i.i_name,
 				le32_to_cpu(child->i.i_namelen),
-				le32_to_cpu(child->footer.ino),
+				le32_to_cpu(F2FS_NODE_FOOTER(child)->ino),
 				map_de_type(le16_to_cpu(child->i.i_mode)),
 				ni.blk_addr, 1);
 	if (ret) {
diff --git a/fsck/dump.c b/fsck/dump.c
index a3fb9bc..ecadfdd 100644
--- a/fsck/dump.c
+++ b/fsck/dump.c
@@ -71,7 +71,7 @@ void nat_dump(struct f2fs_sb_info *sbi, nid_t start_nat, nid_t end_nat)
 					"nid:%5u\tino:%5u\toffset:%5u"
 					"\tblkaddr:%10u\tpack:%d\n",
 					ni.nid, ni.ino,
-					le32_to_cpu(node_block->footer.flag) >>
+					le32_to_cpu(F2FS_NODE_FOOTER(node_block)->flag) >>
 						OFFSET_BIT_SHIFT,
 					ni.blk_addr, pack);
 				ret = write(fd, buf, strlen(buf));
@@ -92,7 +92,7 @@ void nat_dump(struct f2fs_sb_info *sbi, nid_t start_nat, nid_t end_nat)
 				"nid:%5u\tino:%5u\toffset:%5u"
 				"\tblkaddr:%10u\tpack:%d\n",
 				ni.nid, ni.ino,
-				le32_to_cpu(node_block->footer.flag) >>
+				le32_to_cpu(F2FS_NODE_FOOTER(node_block)->flag) >>
 					OFFSET_BIT_SHIFT,
 				ni.blk_addr, pack);
 			ret = write(fd, buf, strlen(buf));
@@ -456,17 +456,17 @@ static int dump_inode_blk(struct f2fs_sb_info *sbi, u32 nid,
 	for (i = 0; i < 5; i++) {
 		if (i == 0 || i == 1)
 			dump_node_blk(sbi, TYPE_DIRECT_NODE,
-					le32_to_cpu(node_blk->i.i_nid[i]),
+					le32_to_cpu(F2FS_INODE_I_NID(&node_blk->i, i)),
 					addr_per_block,
 					&ofs);
 		else if (i == 2 || i == 3)
 			dump_node_blk(sbi, TYPE_INDIRECT_NODE,
-					le32_to_cpu(node_blk->i.i_nid[i]),
+					le32_to_cpu(F2FS_INODE_I_NID(&node_blk->i, i)),
 					addr_per_block,
 					&ofs);
 		else if (i == 4)
 			dump_node_blk(sbi, TYPE_DOUBLE_INDIRECT_NODE,
-					le32_to_cpu(node_blk->i.i_nid[i]),
+					le32_to_cpu(F2FS_INODE_I_NID(&node_blk->i, i)),
 					addr_per_block,
 					&ofs);
 		else
@@ -570,11 +570,11 @@ void dump_node_scan_disk(struct f2fs_sb_info *sbi, nid_t nid)
 
 		ret = dev_read_block(node_blk, blkaddr);
 		ASSERT(ret >= 0);
-		if (le32_to_cpu(node_blk->footer.ino) != nid ||
-				le32_to_cpu(node_blk->footer.nid) != nid)
+		if (le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino) != nid ||
+				le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->nid) != nid)
 			continue;
 		MSG(0, "Info: nid: %u, blkaddr: %lu\n", nid, blkaddr);
-		MSG(0, "node_blk.footer.flag [0x%x]\n", le32_to_cpu(node_blk->footer.flag));
+		MSG(0, "node_blk.footer.flag [0x%x]\n", le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->flag));
 		MSG(0, "node_blk.footer.cp_ver [%x]\n", (u32)(cpver_of_node(node_blk)));
 		print_inode_info(sbi, node_blk, 0);
 	}
@@ -608,11 +608,11 @@ int dump_node(struct f2fs_sb_info *sbi, nid_t nid, int force)
 	if (!is_sit_bitmap_set(sbi, ni.blk_addr))
 		MSG(force, "Invalid sit bitmap, %u\n\n", ni.blk_addr);
 
-	DBG(1, "node_blk.footer.ino [0x%x]\n", le32_to_cpu(node_blk->footer.ino));
-	DBG(1, "node_blk.footer.nid [0x%x]\n", le32_to_cpu(node_blk->footer.nid));
+	DBG(1, "node_blk.footer.ino [0x%x]\n", le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino));
+	DBG(1, "node_blk.footer.nid [0x%x]\n", le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->nid));
 
-	if (le32_to_cpu(node_blk->footer.ino) == ni.ino &&
-			le32_to_cpu(node_blk->footer.nid) == ni.nid) {
+	if (le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino) == ni.ino &&
+			le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->nid) == ni.nid) {
 		if (!c.show_file_map)
 			print_node_info(sbi, node_blk, force);
 
diff --git a/fsck/f2fs.h b/fsck/f2fs.h
index 9791071..0b136b0 100644
--- a/fsck/f2fs.h
+++ b/fsck/f2fs.h
@@ -332,7 +332,7 @@ static inline void *inline_data_addr(struct f2fs_node *node_blk)
 
 static inline unsigned int ofs_of_node(struct f2fs_node *node_blk)
 {
-	unsigned flag = le32_to_cpu(node_blk->footer.flag);
+	unsigned flag = le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->flag);
 	return flag >> OFFSET_BIT_SHIFT;
 }
 
diff --git a/fsck/fsck.c b/fsck/fsck.c
index 5cdf92d..3f5f5cc 100644
--- a/fsck/fsck.c
+++ b/fsck/fsck.c
@@ -243,7 +243,7 @@ static int is_valid_summary(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
 	ret = dev_read_block(node_blk, ni.blk_addr);
 	ASSERT(ret >= 0);
 
-	if (le32_to_cpu(node_blk->footer.nid) != nid)
+	if (le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->nid) != nid)
 		goto out;
 
 	/* check its block address */
@@ -436,33 +436,33 @@ static int sanity_check_nid(struct f2fs_sb_info *sbi, u32 nid,
 	ASSERT(ret >= 0);
 
 	if (ntype == TYPE_INODE &&
-			node_blk->footer.nid != node_blk->footer.ino) {
+			F2FS_NODE_FOOTER(node_blk)->nid != F2FS_NODE_FOOTER(node_blk)->ino) {
 		ASSERT_MSG("nid[0x%x] footer.nid[0x%x] footer.ino[0x%x]",
-				nid, le32_to_cpu(node_blk->footer.nid),
-				le32_to_cpu(node_blk->footer.ino));
+				nid, le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->nid),
+				le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino));
 		return -EINVAL;
 	}
-	if (ni->ino != le32_to_cpu(node_blk->footer.ino)) {
+	if (ni->ino != le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino)) {
 		ASSERT_MSG("nid[0x%x] nat_entry->ino[0x%x] footer.ino[0x%x]",
-				nid, ni->ino, le32_to_cpu(node_blk->footer.ino));
+				nid, ni->ino, le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino));
 		return -EINVAL;
 	}
 	if (ntype != TYPE_INODE && IS_INODE(node_blk)) {
 		ASSERT_MSG("nid[0x%x] footer.nid[0x%x] footer.ino[0x%x]",
-				nid, le32_to_cpu(node_blk->footer.nid),
-				le32_to_cpu(node_blk->footer.ino));
+				nid, le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->nid),
+				le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino));
 		return -EINVAL;
 	}
 
-	if (le32_to_cpu(node_blk->footer.nid) != nid) {
+	if (le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->nid) != nid) {
 		ASSERT_MSG("nid[0x%x] blk_addr[0x%x] footer.nid[0x%x]",
 				nid, ni->blk_addr,
-				le32_to_cpu(node_blk->footer.nid));
+				le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->nid));
 		return -EINVAL;
 	}
 
 	if (ntype == TYPE_XATTR) {
-		u32 flag = le32_to_cpu(node_blk->footer.flag);
+		u32 flag = le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->flag);
 
 		if ((flag >> OFFSET_BIT_SHIFT) != XATTR_NODE_OFFSET) {
 			ASSERT_MSG("xnid[0x%x] has wrong ofs:[0x%x]",
@@ -674,9 +674,9 @@ retry:
 			ret = dev_read_block(node_blk, blkaddr);
 			ASSERT(ret >= 0);
 
-			if (le32_to_cpu(node_blk->footer.ino) !=
+			if (le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino) !=
 					root_ino ||
-				le32_to_cpu(node_blk->footer.nid) !=
+				le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->nid) !=
 					root_ino)
 				continue;
 
@@ -1131,13 +1131,13 @@ check_next:
 
 	/* readahead node blocks */
 	for (idx = 0; idx < 5; idx++) {
-		u32 nid = le32_to_cpu(node_blk->i.i_nid[idx]);
+		u32 nid = le32_to_cpu(F2FS_INODE_I_NID(&node_blk->i, idx));
 		fsck_reada_node_block(sbi, nid);
 	}
 
 	/* check node blocks in inode */
 	for (idx = 0; idx < 5; idx++) {
-		nid_t i_nid = le32_to_cpu(node_blk->i.i_nid[idx]);
+		nid_t i_nid = le32_to_cpu(F2FS_INODE_I_NID(&node_blk->i, idx));
 
 		if (idx == 0 || idx == 1)
 			ntype = TYPE_DIRECT_NODE;
@@ -1157,7 +1157,7 @@ check_next:
 			*blk_cnt = *blk_cnt + 1;
 		} else if (ret == -EINVAL) {
 			if (c.fix_on) {
-				node_blk->i.i_nid[idx] = 0;
+				F2FS_INODE_I_NID(&node_blk->i, idx) = 0;
 				need_fix = 1;
 				FIX_MSG("[0x%x] i_nid[%d] = 0", nid, idx);
 			}
@@ -1230,17 +1230,17 @@ skip_blkcnt_fix:
 			      file_enc_name(&node_blk->i));
 	if (ftype == F2FS_FT_ORPHAN)
 		DBG(1, "Orphan Inode: 0x%x [%s] i_blocks: %u\n\n",
-				le32_to_cpu(node_blk->footer.ino),
+				le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino),
 				en, (u32)i_blocks);
 
 	if (is_qf_ino(F2FS_RAW_SUPER(sbi), nid))
 		DBG(1, "Quota Inode: 0x%x [%s] i_blocks: %u\n\n",
-				le32_to_cpu(node_blk->footer.ino),
+				le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino),
 				en, (u32)i_blocks);
 
 	if (ftype == F2FS_FT_DIR) {
 		DBG(1, "Directory Inode: 0x%x [%s] depth: %d has %d files\n\n",
-				le32_to_cpu(node_blk->footer.ino), en,
+				le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino), en,
 				le32_to_cpu(node_blk->i.i_current_depth),
 				child.files);
 
@@ -1276,7 +1276,7 @@ skip_blkcnt_fix:
 		(c.preen_mode != PREEN_MODE_2 || i_gc_failures != 0x01)) {
 
 		DBG(1, "Regular Inode: 0x%x [%s] depth: %d\n\n",
-				le32_to_cpu(node_blk->footer.ino), en,
+				le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino), en,
 				i_gc_failures);
 
 		if (c.fix_on) {
@@ -1436,7 +1436,7 @@ skip:
 
 	if (need_fix && f2fs_dev_is_writable()) {
 		struct node_info ni;
-		nid_t nid = le32_to_cpu(node_blk->footer.nid);
+		nid_t nid = le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->nid);
 
 		get_node_info(sbi, nid, &ni);
 		ret = dev_write_block(node_blk, ni.blk_addr);
@@ -1478,7 +1478,7 @@ skip:
 
 	if (need_fix && f2fs_dev_is_writable()) {
 		struct node_info ni;
-		nid_t nid = le32_to_cpu(node_blk->footer.nid);
+		nid_t nid = le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->nid);
 
 		get_node_info(sbi, nid, &ni);
 		ret = dev_write_block(node_blk, ni.blk_addr);
@@ -2826,7 +2826,7 @@ static struct f2fs_node *fsck_get_lpf(struct f2fs_sb_info *sbi)
 		    de.ino, ni.blk_addr);
 	}
 
-	c.lpf_ino = le32_to_cpu(node->footer.ino);
+	c.lpf_ino = le32_to_cpu(F2FS_NODE_FOOTER(node)->ino);
 	return node;
 out:
 	free(node);
@@ -2839,7 +2839,7 @@ static int fsck_do_reconnect_file(struct f2fs_sb_info *sbi,
 {
 	char name[80];
 	size_t namelen;
-	nid_t ino = le32_to_cpu(fnode->footer.ino);
+	nid_t ino = le32_to_cpu(F2FS_NODE_FOOTER(fnode)->ino);
 	struct node_info ni;
 	int ftype, ret;
 
@@ -2853,7 +2853,7 @@ static int fsck_do_reconnect_file(struct f2fs_sb_info *sbi,
 		return -EEXIST;
 	}
 
-	get_node_info(sbi, le32_to_cpu(lpf->footer.ino), &ni);
+	get_node_info(sbi, le32_to_cpu(F2FS_NODE_FOOTER(lpf)->ino), &ni);
 	ftype = map_de_type(le16_to_cpu(fnode->i.i_mode));
 	ret = f2fs_add_link(sbi, lpf, (unsigned char *)name, namelen,
 			    ino, ftype, ni.blk_addr, 0);
@@ -2866,7 +2866,7 @@ static int fsck_do_reconnect_file(struct f2fs_sb_info *sbi,
 	memcpy(fnode->i.i_name, name, namelen);
 	fnode->i.i_namelen = cpu_to_le32(namelen);
 	fnode->i.i_pino = c.lpf_ino;
-	get_node_info(sbi, le32_to_cpu(fnode->footer.ino), &ni);
+	get_node_info(sbi, le32_to_cpu(F2FS_NODE_FOOTER(fnode)->ino), &ni);
 	ret = dev_write_block(fnode, ni.blk_addr);
 	ASSERT(ret >= 0);
 
@@ -3017,7 +3017,7 @@ static void fsck_failed_reconnect_file(struct f2fs_sb_info *sbi, nid_t ino)
 	}
 
 	for (i = 0; i < 5; i++) {
-		nid = le32_to_cpu(node->i.i_nid[i]);
+		nid = le32_to_cpu(F2FS_INODE_I_NID(&node->i, i));
 		if (!nid)
 			continue;
 
diff --git a/fsck/mount.c b/fsck/mount.c
index f09e468..162d742 100644
--- a/fsck/mount.c
+++ b/fsck/mount.c
@@ -364,11 +364,11 @@ void print_inode_info(struct f2fs_sb_info *sbi,
 				blkaddr, blkaddr);
 	}
 
-	DISP_u32(inode, i_nid[0]);	/* direct */
-	DISP_u32(inode, i_nid[1]);	/* direct */
-	DISP_u32(inode, i_nid[2]);	/* indirect */
-	DISP_u32(inode, i_nid[3]);	/* indirect */
-	DISP_u32(inode, i_nid[4]);	/* double indirect */
+	DISP_u32(F2FS_INODE_NIDS(inode), i_nid[0]);	/* direct */
+	DISP_u32(F2FS_INODE_NIDS(inode), i_nid[1]);	/* direct */
+	DISP_u32(F2FS_INODE_NIDS(inode), i_nid[2]);	/* indirect */
+	DISP_u32(F2FS_INODE_NIDS(inode), i_nid[3]);	/* indirect */
+	DISP_u32(F2FS_INODE_NIDS(inode), i_nid[4]);	/* double indirect */
 
 	xattr_addr = read_all_xattrs(sbi, node);
 	if (!xattr_addr)
@@ -393,8 +393,8 @@ out:
 void print_node_info(struct f2fs_sb_info *sbi,
 			struct f2fs_node *node_block, int verbose)
 {
-	nid_t ino = le32_to_cpu(node_block->footer.ino);
-	nid_t nid = le32_to_cpu(node_block->footer.nid);
+	nid_t ino = le32_to_cpu(F2FS_NODE_FOOTER(node_block)->ino);
+	nid_t nid = le32_to_cpu(F2FS_NODE_FOOTER(node_block)->nid);
 	/* Is this inode? */
 	if (ino == nid) {
 		DBG(verbose, "Node ID [0x%x:%u] is inode\n", nid, nid);
@@ -2058,7 +2058,7 @@ static void restore_node_summary(struct f2fs_sb_info *sbi,
 	for (i = 0; i < sbi->blocks_per_seg; i++, sum_entry++) {
 		ret = dev_read_block(node_blk, addr);
 		ASSERT(ret >= 0);
-		sum_entry->nid = node_blk->footer.nid;
+		sum_entry->nid = F2FS_NODE_FOOTER(node_blk)->nid;
 		addr++;
 	}
 	free(node_blk);
@@ -2453,7 +2453,7 @@ void update_data_blkaddr(struct f2fs_sb_info *sbi, nid_t nid,
 
 	/* check extent cache entry */
 	if (!IS_INODE(node_blk)) {
-		get_node_info(sbi, le32_to_cpu(node_blk->footer.ino), &ni);
+		get_node_info(sbi, le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino), &ni);
 
 		/* read inode block */
 		ret = dev_read_block(node_blk, ni.blk_addr);
@@ -3568,7 +3568,7 @@ static int loop_node_chain_fix(block_t blkaddr_fast,
 	} while (blkaddr != blkaddr_entry);
 
 	/* fix the blkaddr of last node with NULL_ADDR. */
-	node_blk->footer.next_blkaddr = NULL_ADDR;
+	F2FS_NODE_FOOTER(node_blk)->next_blkaddr = NULL_ADDR;
 	if (IS_INODE(node_blk))
 		err = write_inode(node_blk, blkaddr_tmp);
 	else
diff --git a/fsck/node.c b/fsck/node.c
index 49bc2b6..3761470 100644
--- a/fsck/node.c
+++ b/fsck/node.c
@@ -66,7 +66,7 @@ int f2fs_rebuild_qf_inode(struct f2fs_sb_info *sbi, int qtype)
 
 	if (is_set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG))
 		cp_ver |= (cur_cp_crc(ckpt) << 32);
-	raw_node->footer.cp_ver = cpu_to_le64(cp_ver);
+	F2FS_NODE_FOOTER(raw_node)->cp_ver = cpu_to_le64(cp_ver);
 
 	get_node_info(sbi, ino, &ni);
 	set_summary(&sum, ino, 0, ni.version);
@@ -128,10 +128,10 @@ block_t new_node_block(struct f2fs_sb_info *sbi,
 	node_blk = calloc(BLOCK_SZ, 1);
 	ASSERT(node_blk);
 
-	node_blk->footer.nid = cpu_to_le32(dn->nid);
-	node_blk->footer.ino = f2fs_inode->footer.ino;
-	node_blk->footer.flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
-	node_blk->footer.cp_ver = ckpt->checkpoint_ver;
+	F2FS_NODE_FOOTER(node_blk)->nid = cpu_to_le32(dn->nid);
+	F2FS_NODE_FOOTER(node_blk)->ino = F2FS_NODE_FOOTER(f2fs_inode)->ino;
+	F2FS_NODE_FOOTER(node_blk)->flag = cpu_to_le32(ofs << OFFSET_BIT_SHIFT);
+	F2FS_NODE_FOOTER(node_blk)->cp_ver = ckpt->checkpoint_ver;
 	set_cold_node(node_blk, S_ISDIR(le16_to_cpu(f2fs_inode->i.i_mode)));
 
 	type = CURSEG_COLD_NODE;
@@ -155,7 +155,7 @@ block_t new_node_block(struct f2fs_sb_info *sbi,
 	}
 
 	/* update nat info */
-	update_nat_blkaddr(sbi, le32_to_cpu(f2fs_inode->footer.ino),
+	update_nat_blkaddr(sbi, le32_to_cpu(F2FS_NODE_FOOTER(f2fs_inode)->ino),
 						dn->nid, blkaddr);
 
 	dn->node_blk = node_blk;
diff --git a/fsck/node.h b/fsck/node.h
index d38c322..a6108ac 100644
--- a/fsck/node.h
+++ b/fsck/node.h
@@ -20,13 +20,13 @@
 
 static inline bool IS_INODE(struct f2fs_node *node)
 {
-	return node->footer.ino == node->footer.nid;
+	return F2FS_NODE_FOOTER(node)->nid == F2FS_NODE_FOOTER(node)->ino;
 }
 
 static inline unsigned int ADDRS_PER_PAGE(struct f2fs_sb_info *sbi,
 		struct f2fs_node *node_blk, struct f2fs_node *inode_blk)
 {
-	nid_t ino = le32_to_cpu(node_blk->footer.ino);
+	nid_t ino = le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino);
 	unsigned int nblocks;
 
 	if (IS_INODE(node_blk))
@@ -71,7 +71,7 @@ static inline block_t datablock_addr(struct f2fs_node *node_page,
 static inline void set_nid(struct f2fs_node * rn, int off, nid_t nid, int i)
 {
 	if (i)
-		rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
+		F2FS_INODE_I_NID(&rn->i, off - NODE_DIR1_BLOCK) = cpu_to_le32(nid);
 	else
 		rn->in.nid[off] = cpu_to_le32(nid);
 }
@@ -79,7 +79,7 @@ static inline void set_nid(struct f2fs_node * rn, int off, nid_t nid, int i)
 static inline nid_t get_nid(struct f2fs_node * rn, int off, int i)
 {
 	if (i)
-		return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
+		return le32_to_cpu(F2FS_INODE_I_NID(&rn->i, off - NODE_DIR1_BLOCK));
 	else
 		return le32_to_cpu(rn->in.nid[off]);
 }
@@ -127,12 +127,12 @@ static inline int IS_DNODE(struct f2fs_node *node_page)
 
 static inline nid_t ino_of_node(struct f2fs_node *node_blk)
 {
-	return le32_to_cpu(node_blk->footer.ino);
+	return le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->ino);
 }
 
 static inline __u64 cpver_of_node(struct f2fs_node *node_blk)
 {
-	return le64_to_cpu(node_blk->footer.cp_ver);
+	return le64_to_cpu(F2FS_NODE_FOOTER(node_blk)->cp_ver);
 }
 
 static inline bool is_recoverable_dnode(struct f2fs_sb_info *sbi,
@@ -153,23 +153,23 @@ static inline bool is_recoverable_dnode(struct f2fs_sb_info *sbi,
 
 static inline block_t next_blkaddr_of_node(struct f2fs_node *node_blk)
 {
-	return le32_to_cpu(node_blk->footer.next_blkaddr);
+	return le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->next_blkaddr);
 }
 
 static inline int is_node(struct f2fs_node *node_blk, int type)
 {
-	return le32_to_cpu(node_blk->footer.flag) & (1 << type);
+	return le32_to_cpu(F2FS_NODE_FOOTER(node_blk)->flag) & (1 << type);
 }
 
 static inline void set_cold_node(struct f2fs_node *rn, bool is_dir)
 {
-	unsigned int flag = le32_to_cpu(rn->footer.flag);
+	unsigned int flag = le32_to_cpu(F2FS_NODE_FOOTER(rn)->flag);
 
 	if (is_dir)
 		flag &= ~(0x1 << COLD_BIT_SHIFT);
 	else
 		flag |= (0x1 << COLD_BIT_SHIFT);
-	rn->footer.flag = cpu_to_le32(flag);
+	F2FS_NODE_FOOTER(rn)->flag = cpu_to_le32(flag);
 }
 
 #define is_fsync_dnode(node_blk)	is_node(node_blk, FSYNC_BIT_SHIFT)
diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h
index 5f12363..cb100e7 100644
--- a/include/f2fs_fs.h
+++ b/include/f2fs_fs.h
@@ -1002,6 +1002,14 @@ struct f2fs_compr_blk_cnt {
  * inode flags
  */
 #define F2FS_COMPR_FL		0x00000004 /* Compress file */
+/*
+ * On disk layout is
+ * struct f2fs_inode
+ * struct f2fs_inode_nids
+ *
+ * where the size of f2fs_inode depends on block size.
+ * Do NOT use sizeof
+ */
 struct f2fs_inode {
 	__le16 i_mode;			/* file mode */
 	__u8 i_advise;			/* file hints */
@@ -1051,28 +1059,28 @@ struct f2fs_inode {
 						 */
 			__le32 i_extra_end[0];	/* for attribute size calculation */
 		} __attribute__((packed));
-		__le32 i_addr[DEF_ADDRS_PER_INODE];	/* Pointers to data blocks */
+		__le32 i_addr[0];	/* Pointers to DEF_ADDRS_PER_INODE data blocks */
 	};
+};
+struct f2fs_inode_nids {
 	__le32 i_nid[5];		/* direct(2), indirect(2),
 						double_indirect(1) node id */
 };
 
+#define F2FS_INODE_NIDS(inode) ((struct f2fs_inode_nids *)(&(inode)->i_addr[DEF_ADDRS_PER_INODE]))
+#define F2FS_INODE_I_NID(inode, i) (F2FS_INODE_NIDS((inode))->i_nid[(i)])
+
 static_assert(offsetof(struct f2fs_inode, i_extra_end) -
 	      offsetof(struct f2fs_inode, i_extra_isize) == 36, "");
-static_assert(sizeof(struct f2fs_inode) == F2FS_BLKSIZE - 24, "");
 
 struct direct_node {
-	__le32 addr[DEF_ADDRS_PER_BLOCK];	/* array of data block address */
+	__le32 addr[0];	/* array of DEF_ADDRS_PER_BLOCK data block address */
 };
 
-static_assert(sizeof(struct direct_node) == F2FS_BLKSIZE - 24, "");
-
 struct indirect_node {
-	__le32 nid[NIDS_PER_BLOCK];	/* array of data block address */
+	__le32 nid[0];	/* array of NIDS_PER_BLOCK data block address */
 };
 
-static_assert(sizeof(struct indirect_node) == F2FS_BLKSIZE - 24, "");
-
 enum {
 	COLD_BIT_SHIFT = 0,
 	FSYNC_BIT_SHIFT,
@@ -1082,7 +1090,14 @@ enum {
 
 #define XATTR_NODE_OFFSET	((((unsigned int)-1) << OFFSET_BIT_SHIFT) \
 				>> OFFSET_BIT_SHIFT)
-
+/*
+ * On disk format is:
+ * struct f2fs_node
+ * struct node_footer
+ *
+ * where the size of f2fs_node depends on Block Size.
+ * Do NOT use sizeof. Use F2FS_BLKSIZE instead.
+ */
 struct f2fs_node {
 	/* can be one of three types: inode, direct, and indirect types */
 	union {
@@ -1090,10 +1105,9 @@ struct f2fs_node {
 		struct direct_node dn;
 		struct indirect_node in;
 	};
-	struct node_footer footer;
 };
-
-static_assert(sizeof(struct f2fs_node) == F2FS_BLKSIZE, "");
+#define F2FS_NODE_FOOTER(blk) ((struct node_footer *)\
+				&(((char *)(&(blk)->i))[F2FS_BLKSIZE - sizeof(struct node_footer)]))
 
 /*
  * For NAT entries
@@ -1790,9 +1804,9 @@ static inline void show_version(const char *prog)
 static inline void f2fs_init_inode(struct f2fs_super_block *sb,
 		struct f2fs_node *raw_node, nid_t ino, time_t mtime, mode_t mode)
 {
-	raw_node->footer.nid = cpu_to_le32(ino);
-	raw_node->footer.ino = cpu_to_le32(ino);
-	raw_node->footer.cp_ver = cpu_to_le64(1);
+	F2FS_NODE_FOOTER(raw_node)->nid = cpu_to_le32(ino);
+	F2FS_NODE_FOOTER(raw_node)->ino = cpu_to_le32(ino);
+	F2FS_NODE_FOOTER(raw_node)->cp_ver = cpu_to_le64(1);
 
 	raw_node->i.i_uid = cpu_to_le32(c.root_uid);
 	raw_node->i.i_gid = cpu_to_le32(c.root_gid);
@@ -1978,6 +1992,16 @@ static inline void check_block_struct_sizes(void)
 	/* Check Orphan Block Size */
 	assert(F2FS_ORPHANS_PER_BLOCK * sizeof(__le32)
 			+ sizeof(struct orphan_block_footer) == F2FS_BLKSIZE);
+
+	/* Check Inode Block Size */
+	assert(offsetof(struct f2fs_inode, i_extra_isize) + DEF_ADDRS_PER_INODE * sizeof(__le32)
+		+ sizeof(struct f2fs_inode_nids) + sizeof(struct node_footer) == F2FS_BLKSIZE);
+
+	/* Check Direct Block Size */
+	assert(DEF_ADDRS_PER_BLOCK * sizeof(__le32) + sizeof(struct node_footer) == F2FS_BLKSIZE);
+
+	/* Check Indirect Block Size */
+	assert(NIDS_PER_BLOCK * sizeof(__le32) + sizeof(struct node_footer) == F2FS_BLKSIZE);
 }
 
 #endif	/*__F2FS_FS_H */
diff --git a/lib/libf2fs.c b/lib/libf2fs.c
index c3d5744..8f2cc3b 100644
--- a/lib/libf2fs.c
+++ b/lib/libf2fs.c
@@ -571,7 +571,7 @@ int f2fs_crc_valid(uint32_t blk_crc, void *buf, int len)
 __u32 f2fs_inode_chksum(struct f2fs_node *node)
 {
 	struct f2fs_inode *ri = &node->i;
-	__le32 ino = node->footer.ino;
+	__le32 ino = F2FS_NODE_FOOTER(node)->ino;
 	__le32 gen = ri->i_generation;
 	__u32 chksum, chksum_seed;
 	__u32 dummy_cs = 0;
diff --git a/mkfs/f2fs_format.c b/mkfs/f2fs_format.c
index 3453e17..50890c8 100644
--- a/mkfs/f2fs_format.c
+++ b/mkfs/f2fs_format.c
@@ -1104,7 +1104,7 @@ static int f2fs_discard_obsolete_dnode(void)
 	if (c.zoned_mode || c.feature & F2FS_FEATURE_RO)
 		return 0;
 
-	raw_node = calloc(sizeof(struct f2fs_node), 1);
+	raw_node = calloc(F2FS_BLKSIZE, 1);
 	if (raw_node == NULL) {
 		MSG(1, "\tError: Calloc Failed for discard_raw_node!!!\n");
 		return -1;
@@ -1128,7 +1128,7 @@ static int f2fs_discard_obsolete_dnode(void)
 			return -1;
 		}
 
-		next_blkaddr = le32_to_cpu(raw_node->footer.next_blkaddr);
+		next_blkaddr = le32_to_cpu(F2FS_NODE_FOOTER(raw_node)->next_blkaddr);
 		memset(raw_node, 0, F2FS_BLKSIZE);
 
 		DBG(1, "\tDiscard dnode, at offset 0x%08"PRIx64"\n", offset);
@@ -1295,7 +1295,7 @@ static int f2fs_write_root_inode(void)
 				cpu_to_le32(data_blkaddr);
 
 	node_blkaddr = alloc_next_free_block(CURSEG_HOT_NODE);
-	raw_node->footer.next_blkaddr = cpu_to_le32(node_blkaddr + 1);
+	F2FS_NODE_FOOTER(raw_node)->next_blkaddr = cpu_to_le32(node_blkaddr + 1);
 
 	DBG(1, "\tWriting root inode (hot node), offset 0x%x\n", node_blkaddr);
 	if (write_inode(raw_node, node_blkaddr) < 0) {
@@ -1413,7 +1413,7 @@ static int f2fs_write_qf_inode(int qtype)
 	raw_node->i.i_flags = F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
 
 	node_blkaddr = alloc_next_free_block(CURSEG_HOT_NODE);
-	raw_node->footer.next_blkaddr = cpu_to_le32(node_blkaddr + 1);
+	F2FS_NODE_FOOTER(raw_node)->next_blkaddr = cpu_to_le32(node_blkaddr + 1);
 
 	if (qtype == 0)
 		raw_id = raw_node->i.i_uid;
@@ -1548,7 +1548,7 @@ static int f2fs_write_lpf_inode(void)
 	memcpy(raw_node->i.i_name, LPF, strlen(LPF));
 
 	node_blkaddr = alloc_next_free_block(CURSEG_HOT_NODE);
-	raw_node->footer.next_blkaddr = cpu_to_le32(node_blkaddr + 1);
+	F2FS_NODE_FOOTER(raw_node)->next_blkaddr = cpu_to_le32(node_blkaddr + 1);
 
 	data_blkaddr = f2fs_add_default_dentry_lpf();
 	if (data_blkaddr == 0) {