Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2:
  nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty
  nilfs2: always set back pointer to host inode in mapping->host
  nilfs2: get rid of NILFS_I_NILFS
  nilfs2: use list_first_entry
  nilfs2: use empty_aops for gc-inodes
  nilfs2: implement resize ioctl
  nilfs2: add truncation routine of segment usage file
  nilfs2: add routine to move secondary super block
  nilfs2: add ioctl which limits range of segment to be allocated
  nilfs2: zero fill unused portion of super root block
  nilfs2: super root size should change depending on inode size
  nilfs2: get rid of private page allocator
  nilfs2: merge list_del()/list_add_tail() to list_move_tail()

26 files changed, 600 insertions, 385 deletions

diff --git a/fs/nilfs2/alloc.c b/fs/nilfs2/alloc.c
index f7684483785e..eed4d7b26249 100644
--- a/fs/nilfs2/alloc.c
+++ b/fs/nilfs2/alloc.c
@@ -489,8 +489,8 @@ int nilfs_palloc_prepare_alloc_entry(struct inode *inode,
 void nilfs_palloc_commit_alloc_entry(struct inode *inode,
 				     struct nilfs_palloc_req *req)
 {
-	nilfs_mdt_mark_buffer_dirty(req->pr_bitmap_bh);
-	nilfs_mdt_mark_buffer_dirty(req->pr_desc_bh);
+	mark_buffer_dirty(req->pr_bitmap_bh);
+	mark_buffer_dirty(req->pr_desc_bh);
 	nilfs_mdt_mark_dirty(inode);
 
 	brelse(req->pr_bitmap_bh);
@@ -527,8 +527,8 @@ void nilfs_palloc_commit_free_entry(struct inode *inode,
 	kunmap(req->pr_bitmap_bh->b_page);
 	kunmap(req->pr_desc_bh->b_page);
 
-	nilfs_mdt_mark_buffer_dirty(req->pr_desc_bh);
-	nilfs_mdt_mark_buffer_dirty(req->pr_bitmap_bh);
+	mark_buffer_dirty(req->pr_desc_bh);
+	mark_buffer_dirty(req->pr_bitmap_bh);
 	nilfs_mdt_mark_dirty(inode);
 
 	brelse(req->pr_bitmap_bh);
@@ -683,8 +683,8 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems)
 		kunmap(bitmap_bh->b_page);
 		kunmap(desc_bh->b_page);
 
-		nilfs_mdt_mark_buffer_dirty(desc_bh);
-		nilfs_mdt_mark_buffer_dirty(bitmap_bh);
+		mark_buffer_dirty(desc_bh);
+		mark_buffer_dirty(bitmap_bh);
 		nilfs_mdt_mark_dirty(inode);
 
 		brelse(bitmap_bh);
diff --git a/fs/nilfs2/bmap.c b/fs/nilfs2/bmap.c
index 4723f04e9b12..aadbd0b5e3e8 100644
--- a/fs/nilfs2/bmap.c
+++ b/fs/nilfs2/bmap.c
@@ -34,7 +34,9 @@
 
 struct inode *nilfs_bmap_get_dat(const struct nilfs_bmap *bmap)
 {
-	return NILFS_I_NILFS(bmap->b_inode)->ns_dat;
+	struct the_nilfs *nilfs = bmap->b_inode->i_sb->s_fs_info;
+
+	return nilfs->ns_dat;
 }
 
 static int nilfs_bmap_convert_error(struct nilfs_bmap *bmap,
diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c
index 609cd223eea8..a35ae35e6932 100644
--- a/fs/nilfs2/btnode.c
+++ b/fs/nilfs2/btnode.c
@@ -34,12 +34,6 @@
 #include "page.h"
 #include "btnode.h"
 
-void nilfs_btnode_cache_init(struct address_space *btnc,
-			     struct backing_dev_info *bdi)
-{
-	nilfs_mapping_init(btnc, bdi);
-}
-
 void nilfs_btnode_cache_clear(struct address_space *btnc)
 {
 	invalidate_mapping_pages(btnc, 0, -1);
@@ -62,7 +56,7 @@ nilfs_btnode_create_block(struct address_space *btnc, __u64 blocknr)
 		BUG();
 	}
 	memset(bh->b_data, 0, 1 << inode->i_blkbits);
-	bh->b_bdev = NILFS_I_NILFS(inode)->ns_bdev;
+	bh->b_bdev = inode->i_sb->s_bdev;
 	bh->b_blocknr = blocknr;
 	set_buffer_mapped(bh);
 	set_buffer_uptodate(bh);
@@ -94,10 +88,11 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
 	if (pblocknr == 0) {
 		pblocknr = blocknr;
 		if (inode->i_ino != NILFS_DAT_INO) {
-			struct inode *dat = NILFS_I_NILFS(inode)->ns_dat;
+			struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
 
 			/* blocknr is a virtual block number */
-			err = nilfs_dat_translate(dat, blocknr, &pblocknr);
+			err = nilfs_dat_translate(nilfs->ns_dat, blocknr,
+						  &pblocknr);
 			if (unlikely(err)) {
 				brelse(bh);
 				goto out_locked;
@@ -120,7 +115,7 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
 		goto found;
 	}
 	set_buffer_mapped(bh);
-	bh->b_bdev = NILFS_I_NILFS(inode)->ns_bdev;
+	bh->b_bdev = inode->i_sb->s_bdev;
 	bh->b_blocknr = pblocknr; /* set block address for read */
 	bh->b_end_io = end_buffer_read_sync;
 	get_bh(bh);
@@ -259,7 +254,7 @@ void nilfs_btnode_commit_change_key(struct address_space *btnc,
 				       "invalid oldkey %lld (newkey=%lld)",
 				       (unsigned long long)oldkey,
 				       (unsigned long long)newkey);
-		nilfs_btnode_mark_dirty(obh);
+		mark_buffer_dirty(obh);
 
 		spin_lock_irq(&btnc->tree_lock);
 		radix_tree_delete(&btnc->page_tree, oldkey);
@@ -271,7 +266,7 @@ void nilfs_btnode_commit_change_key(struct address_space *btnc,
 		unlock_page(opage);
 	} else {
 		nilfs_copy_buffer(nbh, obh);
-		nilfs_btnode_mark_dirty(nbh);
+		mark_buffer_dirty(nbh);
 
 		nbh->b_blocknr = newkey;
 		ctxt->bh = nbh;
diff --git a/fs/nilfs2/btnode.h b/fs/nilfs2/btnode.h
index 1b8ebd888c28..3a4dd2d8d3fc 100644
--- a/fs/nilfs2/btnode.h
+++ b/fs/nilfs2/btnode.h
@@ -37,7 +37,6 @@ struct nilfs_btnode_chkey_ctxt {
 	struct buffer_head *newbh;
 };
 
-void nilfs_btnode_cache_init(struct address_space *, struct backing_dev_info *);
 void nilfs_btnode_cache_clear(struct address_space *);
 struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,
 					      __u64 blocknr);
@@ -51,7 +50,4 @@ void nilfs_btnode_commit_change_key(struct address_space *,
 void nilfs_btnode_abort_change_key(struct address_space *,
 				   struct nilfs_btnode_chkey_ctxt *);
 
-#define nilfs_btnode_mark_dirty(bh)	nilfs_mark_buffer_dirty(bh)
-
-
 #endif	/* _NILFS_BTNODE_H */
diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c
index d451ae0e0bf3..7eafe468a29c 100644
--- a/fs/nilfs2/btree.c
+++ b/fs/nilfs2/btree.c
@@ -714,7 +714,7 @@ static void nilfs_btree_promote_key(struct nilfs_bmap *btree,
 				nilfs_btree_get_nonroot_node(path, level),
 				path[level].bp_index, key);
 			if (!buffer_dirty(path[level].bp_bh))
-				nilfs_btnode_mark_dirty(path[level].bp_bh);
+				mark_buffer_dirty(path[level].bp_bh);
 		} while ((path[level].bp_index == 0) &&
 			 (++level < nilfs_btree_height(btree) - 1));
 	}
@@ -739,7 +739,7 @@ static void nilfs_btree_do_insert(struct nilfs_bmap *btree,
 		nilfs_btree_node_insert(node, path[level].bp_index,
 					*keyp, *ptrp, ncblk);
 		if (!buffer_dirty(path[level].bp_bh))
-			nilfs_btnode_mark_dirty(path[level].bp_bh);
+			mark_buffer_dirty(path[level].bp_bh);
 
 		if (path[level].bp_index == 0)
 			nilfs_btree_promote_key(btree, path, level + 1,
@@ -777,9 +777,9 @@ static void nilfs_btree_carry_left(struct nilfs_bmap *btree,
 	nilfs_btree_node_move_left(left, node, n, ncblk, ncblk);
 
 	if (!buffer_dirty(path[level].bp_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_bh);
+		mark_buffer_dirty(path[level].bp_bh);
 	if (!buffer_dirty(path[level].bp_sib_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
+		mark_buffer_dirty(path[level].bp_sib_bh);
 
 	nilfs_btree_promote_key(btree, path, level + 1,
 				nilfs_btree_node_get_key(node, 0));
@@ -823,9 +823,9 @@ static void nilfs_btree_carry_right(struct nilfs_bmap *btree,
 	nilfs_btree_node_move_right(node, right, n, ncblk, ncblk);
 
 	if (!buffer_dirty(path[level].bp_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_bh);
+		mark_buffer_dirty(path[level].bp_bh);
 	if (!buffer_dirty(path[level].bp_sib_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
+		mark_buffer_dirty(path[level].bp_sib_bh);
 
 	path[level + 1].bp_index++;
 	nilfs_btree_promote_key(btree, path, level + 1,
@@ -870,9 +870,9 @@ static void nilfs_btree_split(struct nilfs_bmap *btree,
 	nilfs_btree_node_move_right(node, right, n, ncblk, ncblk);
 
 	if (!buffer_dirty(path[level].bp_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_bh);
+		mark_buffer_dirty(path[level].bp_bh);
 	if (!buffer_dirty(path[level].bp_sib_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
+		mark_buffer_dirty(path[level].bp_sib_bh);
 
 	newkey = nilfs_btree_node_get_key(right, 0);
 	newptr = path[level].bp_newreq.bpr_ptr;
@@ -919,7 +919,7 @@ static void nilfs_btree_grow(struct nilfs_bmap *btree,
 	nilfs_btree_node_set_level(root, level + 1);
 
 	if (!buffer_dirty(path[level].bp_sib_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
+		mark_buffer_dirty(path[level].bp_sib_bh);
 
 	path[level].bp_bh = path[level].bp_sib_bh;
 	path[level].bp_sib_bh = NULL;
@@ -1194,7 +1194,7 @@ static void nilfs_btree_do_delete(struct nilfs_bmap *btree,
 		nilfs_btree_node_delete(node, path[level].bp_index,
 					keyp, ptrp, ncblk);
 		if (!buffer_dirty(path[level].bp_bh))
-			nilfs_btnode_mark_dirty(path[level].bp_bh);
+			mark_buffer_dirty(path[level].bp_bh);
 		if (path[level].bp_index == 0)
 			nilfs_btree_promote_key(btree, path, level + 1,
 				nilfs_btree_node_get_key(node, 0));
@@ -1226,9 +1226,9 @@ static void nilfs_btree_borrow_left(struct nilfs_bmap *btree,
 	nilfs_btree_node_move_right(left, node, n, ncblk, ncblk);
 
 	if (!buffer_dirty(path[level].bp_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_bh);
+		mark_buffer_dirty(path[level].bp_bh);
 	if (!buffer_dirty(path[level].bp_sib_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
+		mark_buffer_dirty(path[level].bp_sib_bh);
 
 	nilfs_btree_promote_key(btree, path, level + 1,
 				nilfs_btree_node_get_key(node, 0));
@@ -1258,9 +1258,9 @@ static void nilfs_btree_borrow_right(struct nilfs_bmap *btree,
 	nilfs_btree_node_move_left(node, right, n, ncblk, ncblk);
 
 	if (!buffer_dirty(path[level].bp_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_bh);
+		mark_buffer_dirty(path[level].bp_bh);
 	if (!buffer_dirty(path[level].bp_sib_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
+		mark_buffer_dirty(path[level].bp_sib_bh);
 
 	path[level + 1].bp_index++;
 	nilfs_btree_promote_key(btree, path, level + 1,
@@ -1289,7 +1289,7 @@ static void nilfs_btree_concat_left(struct nilfs_bmap *btree,
 	nilfs_btree_node_move_left(left, node, n, ncblk, ncblk);
 
 	if (!buffer_dirty(path[level].bp_sib_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
+		mark_buffer_dirty(path[level].bp_sib_bh);
 
 	nilfs_btnode_delete(path[level].bp_bh);
 	path[level].bp_bh = path[level].bp_sib_bh;
@@ -1315,7 +1315,7 @@ static void nilfs_btree_concat_right(struct nilfs_bmap *btree,
 	nilfs_btree_node_move_left(node, right, n, ncblk, ncblk);
 
 	if (!buffer_dirty(path[level].bp_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_bh);
+		mark_buffer_dirty(path[level].bp_bh);
 
 	nilfs_btnode_delete(path[level].bp_sib_bh);
 	path[level].bp_sib_bh = NULL;
@@ -1709,7 +1709,7 @@ nilfs_btree_commit_convert_and_insert(struct nilfs_bmap *btree,
 		nilfs_btree_node_init(node, 0, 1, n, ncblk, keys, ptrs);
 		nilfs_btree_node_insert(node, n, key, dreq->bpr_ptr, ncblk);
 		if (!buffer_dirty(bh))
-			nilfs_btnode_mark_dirty(bh);
+			mark_buffer_dirty(bh);
 		if (!nilfs_bmap_dirty(btree))
 			nilfs_bmap_set_dirty(btree);
 
@@ -1787,7 +1787,7 @@ static int nilfs_btree_propagate_p(struct nilfs_bmap *btree,
 {
 	while ((++level < nilfs_btree_height(btree) - 1) &&
 	       !buffer_dirty(path[level].bp_bh))
-		nilfs_btnode_mark_dirty(path[level].bp_bh);
+		mark_buffer_dirty(path[level].bp_bh);
 
 	return 0;
 }
@@ -2229,7 +2229,7 @@ static int nilfs_btree_mark(struct nilfs_bmap *btree, __u64 key, int level)
 	}
 
 	if (!buffer_dirty(bh))
-		nilfs_btnode_mark_dirty(bh);
+		mark_buffer_dirty(bh);
 	brelse(bh);
 	if (!nilfs_bmap_dirty(btree))
 		nilfs_bmap_set_dirty(btree);
diff --git a/fs/nilfs2/cpfile.c b/fs/nilfs2/cpfile.c
index 5ff15a8a1024..c9b342c8b503 100644
--- a/fs/nilfs2/cpfile.c
+++ b/fs/nilfs2/cpfile.c
@@ -216,14 +216,14 @@ int nilfs_cpfile_get_checkpoint(struct inode *cpfile,
 		if (!nilfs_cpfile_is_in_first(cpfile, cno))
 			nilfs_cpfile_block_add_valid_checkpoints(cpfile, cp_bh,
 								 kaddr, 1);
-		nilfs_mdt_mark_buffer_dirty(cp_bh);
+		mark_buffer_dirty(cp_bh);
 
 		kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
 		header = nilfs_cpfile_block_get_header(cpfile, header_bh,
 						       kaddr);
 		le64_add_cpu(&header->ch_ncheckpoints, 1);
 		kunmap_atomic(kaddr, KM_USER0);
-		nilfs_mdt_mark_buffer_dirty(header_bh);
+		mark_buffer_dirty(header_bh);
 		nilfs_mdt_mark_dirty(cpfile);
 	}
 
@@ -326,7 +326,7 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile,
 		}
 		if (nicps > 0) {
 			tnicps += nicps;
-			nilfs_mdt_mark_buffer_dirty(cp_bh);
+			mark_buffer_dirty(cp_bh);
 			nilfs_mdt_mark_dirty(cpfile);
 			if (!nilfs_cpfile_is_in_first(cpfile, cno)) {
 				count =
@@ -358,7 +358,7 @@ int nilfs_cpfile_delete_checkpoints(struct inode *cpfile,
 		header = nilfs_cpfile_block_get_header(cpfile, header_bh,
 						       kaddr);
 		le64_add_cpu(&header->ch_ncheckpoints, -(u64)tnicps);
-		nilfs_mdt_mark_buffer_dirty(header_bh);
+		mark_buffer_dirty(header_bh);
 		nilfs_mdt_mark_dirty(cpfile);
 		kunmap_atomic(kaddr, KM_USER0);
 	}
@@ -671,10 +671,10 @@ static int nilfs_cpfile_set_snapshot(struct inode *cpfile, __u64 cno)
 	le64_add_cpu(&header->ch_nsnapshots, 1);
 	kunmap_atomic(kaddr, KM_USER0);
 
-	nilfs_mdt_mark_buffer_dirty(prev_bh);
-	nilfs_mdt_mark_buffer_dirty(curr_bh);
-	nilfs_mdt_mark_buffer_dirty(cp_bh);
-	nilfs_mdt_mark_buffer_dirty(header_bh);
+	mark_buffer_dirty(prev_bh);
+	mark_buffer_dirty(curr_bh);
+	mark_buffer_dirty(cp_bh);
+	mark_buffer_dirty(header_bh);
 	nilfs_mdt_mark_dirty(cpfile);
 
 	brelse(prev_bh);
@@ -774,10 +774,10 @@ static int nilfs_cpfile_clear_snapshot(struct inode *cpfile, __u64 cno)
 	le64_add_cpu(&header->ch_nsnapshots, -1);
 	kunmap_atomic(kaddr, KM_USER0);
 
-	nilfs_mdt_mark_buffer_dirty(next_bh);
-	nilfs_mdt_mark_buffer_dirty(prev_bh);
-	nilfs_mdt_mark_buffer_dirty(cp_bh);
-	nilfs_mdt_mark_buffer_dirty(header_bh);
+	mark_buffer_dirty(next_bh);
+	mark_buffer_dirty(prev_bh);
+	mark_buffer_dirty(cp_bh);
+	mark_buffer_dirty(header_bh);
 	nilfs_mdt_mark_dirty(cpfile);
 
 	brelse(prev_bh);
diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c
index 59e5fe742f7b..fcc2f869af16 100644
--- a/fs/nilfs2/dat.c
+++ b/fs/nilfs2/dat.c
@@ -54,7 +54,7 @@ static int nilfs_dat_prepare_entry(struct inode *dat,
 static void nilfs_dat_commit_entry(struct inode *dat,
 				   struct nilfs_palloc_req *req)
 {
-	nilfs_mdt_mark_buffer_dirty(req->pr_entry_bh);
+	mark_buffer_dirty(req->pr_entry_bh);
 	nilfs_mdt_mark_dirty(dat);
 	brelse(req->pr_entry_bh);
 }
@@ -361,7 +361,7 @@ int nilfs_dat_move(struct inode *dat, __u64 vblocknr, sector_t blocknr)
 	entry->de_blocknr = cpu_to_le64(blocknr);
 	kunmap_atomic(kaddr, KM_USER0);
 
-	nilfs_mdt_mark_buffer_dirty(entry_bh);
+	mark_buffer_dirty(entry_bh);
 	nilfs_mdt_mark_dirty(dat);
 
 	brelse(entry_bh);
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index 397e73258631..d7eeca62febd 100644
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -111,7 +111,6 @@ static int nilfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 	nilfs_transaction_commit(inode->i_sb);
 
  mapped:
-	SetPageChecked(page);
 	wait_on_page_writeback(page);
 	return VM_FAULT_LOCKED;
 }
diff --git a/fs/nilfs2/gcinode.c b/fs/nilfs2/gcinode.c
index 1c2a3e23f8b2..08a07a218d26 100644
--- a/fs/nilfs2/gcinode.c
+++ b/fs/nilfs2/gcinode.c
@@ -48,9 +48,6 @@
 #include "dat.h"
 #include "ifile.h"
 
-static const struct address_space_operations def_gcinode_aops = {
-};
-
 /*
  * nilfs_gccache_submit_read_data() - add data buffer and submit read request
  * @inode - gc inode
@@ -87,9 +84,9 @@ int nilfs_gccache_submit_read_data(struct inode *inode, sector_t blkoff,
 		goto out;
 
 	if (pbn == 0) {
-		struct inode *dat_inode = NILFS_I_NILFS(inode)->ns_dat;
-					  /* use original dat, not gc dat. */
-		err = nilfs_dat_translate(dat_inode, vbn, &pbn);
+		struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
+
+		err = nilfs_dat_translate(nilfs->ns_dat, vbn, &pbn);
 		if (unlikely(err)) { /* -EIO, -ENOMEM, -ENOENT */
 			brelse(bh);
 			goto failed;
@@ -103,7 +100,7 @@ int nilfs_gccache_submit_read_data(struct inode *inode, sector_t blkoff,
 	}
 
 	if (!buffer_mapped(bh)) {
-		bh->b_bdev = NILFS_I_NILFS(inode)->ns_bdev;
+		bh->b_bdev = inode->i_sb->s_bdev;
 		set_buffer_mapped(bh);
 	}
 	bh->b_blocknr = pbn;
@@ -160,15 +157,11 @@ int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *bh)
 	if (buffer_dirty(bh))
 		return -EEXIST;
 
-	if (buffer_nilfs_node(bh)) {
-		if (nilfs_btree_broken_node_block(bh)) {
-			clear_buffer_uptodate(bh);
-			return -EIO;
-		}
-		nilfs_btnode_mark_dirty(bh);
-	} else {
-		nilfs_mark_buffer_dirty(bh);
+	if (buffer_nilfs_node(bh) && nilfs_btree_broken_node_block(bh)) {
+		clear_buffer_uptodate(bh);
+		return -EIO;
 	}
+	mark_buffer_dirty(bh);
 	return 0;
 }
 
@@ -178,7 +171,7 @@ int nilfs_init_gcinode(struct inode *inode)
 
 	inode->i_mode = S_IFREG;
 	mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
-	inode->i_mapping->a_ops = &def_gcinode_aops;
+	inode->i_mapping->a_ops = &empty_aops;
 	inode->i_mapping->backing_dev_info = inode->i_sb->s_bdi;
 
 	ii->i_flags = 0;
diff --git a/fs/nilfs2/ifile.c b/fs/nilfs2/ifile.c
index bfc73d3a30ed..684d76300a80 100644
--- a/fs/nilfs2/ifile.c
+++ b/fs/nilfs2/ifile.c
@@ -80,7 +80,7 @@ int nilfs_ifile_create_inode(struct inode *ifile, ino_t *out_ino,
 		return ret;
 	}
 	nilfs_palloc_commit_alloc_entry(ifile, &req);
-	nilfs_mdt_mark_buffer_dirty(req.pr_entry_bh);
+	mark_buffer_dirty(req.pr_entry_bh);
 	nilfs_mdt_mark_dirty(ifile);
 	*out_ino = (ino_t)req.pr_entry_nr;
 	*out_bh = req.pr_entry_bh;
@@ -128,7 +128,7 @@ int nilfs_ifile_delete_inode(struct inode *ifile, ino_t ino)
 	raw_inode->i_flags = 0;
 	kunmap_atomic(kaddr, KM_USER0);
 
-	nilfs_mdt_mark_buffer_dirty(req.pr_entry_bh);
+	mark_buffer_dirty(req.pr_entry_bh);
 	brelse(req.pr_entry_bh);
 
 	nilfs_palloc_commit_free_entry(ifile, &req);
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index c0aa27490c02..587f18432832 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -74,14 +74,14 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff,
 		    struct buffer_head *bh_result, int create)
 {
 	struct nilfs_inode_info *ii = NILFS_I(inode);
+	struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
 	__u64 blknum = 0;
 	int err = 0, ret;
-	struct inode *dat = NILFS_I_NILFS(inode)->ns_dat;
 	unsigned maxblocks = bh_result->b_size >> inode->i_blkbits;
 
-	down_read(&NILFS_MDT(dat)->mi_sem);
+	down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
 	ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks);
-	up_read(&NILFS_MDT(dat)->mi_sem);
+	up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
 	if (ret >= 0) {	/* found */
 		map_bh(bh_result, inode->i_sb, blknum);
 		if (ret > 0)
@@ -596,6 +596,16 @@ void nilfs_write_inode_common(struct inode *inode,
 	raw_inode->i_flags = cpu_to_le32(ii->i_flags);
 	raw_inode->i_generation = cpu_to_le32(inode->i_generation);
 
+	if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) {
+		struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
+
+		/* zero-fill unused portion in the case of super root block */
+		raw_inode->i_xattr = 0;
+		raw_inode->i_pad = 0;
+		memset((void *)raw_inode + sizeof(*raw_inode), 0,
+		       nilfs->ns_inode_size - sizeof(*raw_inode));
+	}
+
 	if (has_bmap)
 		nilfs_bmap_write(ii->i_bmap, raw_inode);
 	else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
@@ -872,8 +882,7 @@ int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty)
 			return -EINVAL; /* NILFS_I_DIRTY may remain for
 					   freeing inode */
 		}
-		list_del(&ii->i_dirty);
-		list_add_tail(&ii->i_dirty, &nilfs->ns_dirty_files);
+		list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files);
 		set_bit(NILFS_I_QUEUED, &ii->i_state);
 	}
 	spin_unlock(&nilfs->ns_inode_lock);
@@ -892,7 +901,7 @@ int nilfs_mark_inode_dirty(struct inode *inode)
 		return err;
 	}
 	nilfs_update_inode(inode, ibh);
-	nilfs_mdt_mark_buffer_dirty(ibh);
+	mark_buffer_dirty(ibh);
 	nilfs_mdt_mark_dirty(NILFS_I(inode)->i_root->ifile);
 	brelse(ibh);
 	return 0;
@@ -931,7 +940,7 @@ void nilfs_dirty_inode(struct inode *inode)
 int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 		 __u64 start, __u64 len)
 {
-	struct the_nilfs *nilfs = NILFS_I_NILFS(inode);
+	struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
 	__u64 logical = 0, phys = 0, size = 0;
 	__u32 flags = 0;
 	loff_t isize;
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index f2469ba6246b..41d6743d303c 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -698,6 +698,63 @@ static int nilfs_ioctl_sync(struct inode *inode, struct file *filp,
 	return 0;
 }
 
+static int nilfs_ioctl_resize(struct inode *inode, struct file *filp,
+			      void __user *argp)
+{
+	__u64 newsize;
+	int ret = -EPERM;
+
+	if (!capable(CAP_SYS_ADMIN))
+		goto out;
+
+	ret = mnt_want_write(filp->f_path.mnt);
+	if (ret)
+		goto out;
+
+	ret = -EFAULT;
+	if (copy_from_user(&newsize, argp, sizeof(newsize)))
+		goto out_drop_write;
+
+	ret = nilfs_resize_fs(inode->i_sb, newsize);
+
+out_drop_write:
+	mnt_drop_write(filp->f_path.mnt);
+out:
+	return ret;
+}
+
+static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp)
+{
+	struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
+	__u64 range[2];
+	__u64 minseg, maxseg;
+	unsigned long segbytes;
+	int ret = -EPERM;
+
+	if (!capable(CAP_SYS_ADMIN))
+		goto out;
+
+	ret = -EFAULT;
+	if (copy_from_user(range, argp, sizeof(__u64[2])))
+		goto out;
+
+	ret = -ERANGE;
+	if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode))
+		goto out;
+
+	segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize;
+
+	minseg = range[0] + segbytes - 1;
+	do_div(minseg, segbytes);
+	maxseg = NILFS_SB2_OFFSET_BYTES(range[1]);
+	do_div(maxseg, segbytes);
+	maxseg--;
+
+	ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg);
+out:
+	return ret;
+}
+
 static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp,
 				unsigned int cmd, void __user *argp,
 				size_t membsz,
@@ -763,6 +820,10 @@ long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		return nilfs_ioctl_clean_segments(inode, filp, cmd, argp);
 	case NILFS_IOCTL_SYNC:
 		return nilfs_ioctl_sync(inode, filp, cmd, argp);
+	case NILFS_IOCTL_RESIZE:
+		return nilfs_ioctl_resize(inode, filp, argp);
+	case NILFS_IOCTL_SET_ALLOC_RANGE:
+		return nilfs_ioctl_set_alloc_range(inode, argp);
 	default:
 		return -ENOTTY;
 	}
diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index a649b05f7069..800e8d78a83b 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -66,7 +66,7 @@ nilfs_mdt_insert_new_block(struct inode *inode, unsigned long block,
 	kunmap_atomic(kaddr, KM_USER0);
 
 	set_buffer_uptodate(bh);
-	nilfs_mark_buffer_dirty(bh);
+	mark_buffer_dirty(bh);
 	nilfs_mdt_mark_dirty(inode);
 	return 0;
 }
@@ -355,7 +355,7 @@ int nilfs_mdt_mark_block_dirty(struct inode *inode, unsigned long block)
 	err = nilfs_mdt_read_block(inode, block, 0, &bh);
 	if (unlikely(err))
 		return err;
-	nilfs_mark_buffer_dirty(bh);
+	mark_buffer_dirty(bh);
 	nilfs_mdt_mark_dirty(inode);
 	brelse(bh);
 	return 0;
@@ -450,9 +450,9 @@ int nilfs_mdt_setup_shadow_map(struct inode *inode,
 
 	INIT_LIST_HEAD(&shadow->frozen_buffers);
 	address_space_init_once(&shadow->frozen_data);
-	nilfs_mapping_init(&shadow->frozen_data, bdi);
+	nilfs_mapping_init(&shadow->frozen_data, inode, bdi);
 	address_space_init_once(&shadow->frozen_btnodes);
-	nilfs_mapping_init(&shadow->frozen_btnodes, bdi);
+	nilfs_mapping_init(&shadow->frozen_btnodes, inode, bdi);
 	mi->mi_shadow = shadow;
 	return 0;
 }
diff --git a/fs/nilfs2/mdt.h b/fs/nilfs2/mdt.h
index ed68563ec708..ab20a4baa50f 100644
--- a/fs/nilfs2/mdt.h
+++ b/fs/nilfs2/mdt.h
@@ -64,11 +64,6 @@ static inline struct nilfs_mdt_info *NILFS_MDT(const struct inode *inode)
 	return inode->i_private;
 }
 
-static inline struct the_nilfs *NILFS_I_NILFS(struct inode *inode)
-{
-	return inode->i_sb->s_fs_info;
-}
-
 /* Default GFP flags using highmem */
 #define NILFS_MDT_GFP      (__GFP_WAIT | __GFP_IO | __GFP_HIGHMEM)
 
@@ -93,8 +88,6 @@ int nilfs_mdt_freeze_buffer(struct inode *inode, struct buffer_head *bh);
 struct buffer_head *nilfs_mdt_get_frozen_buffer(struct inode *inode,
 						struct buffer_head *bh);
 
-#define nilfs_mdt_mark_buffer_dirty(bh)	nilfs_mark_buffer_dirty(bh)
-
 static inline void nilfs_mdt_mark_dirty(struct inode *inode)
 {
 	if (!test_bit(NILFS_I_DIRTY, &NILFS_I(inode)->i_state))
@@ -108,7 +101,7 @@ static inline void nilfs_mdt_clear_dirty(struct inode *inode)
 
 static inline __u64 nilfs_mdt_cno(struct inode *inode)
 {
-	return NILFS_I_NILFS(inode)->ns_cno;
+	return ((struct the_nilfs *)inode->i_sb->s_fs_info)->ns_cno;
 }
 
 #define nilfs_mdt_bgl_lock(inode, bg) \
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index a8dd344303cb..a9c6a531f80c 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -80,12 +80,6 @@ static inline struct inode *NILFS_BTNC_I(struct address_space *btnc)
 	return &ii->vfs_inode;
 }
 
-static inline struct inode *NILFS_AS_I(struct address_space *mapping)
-{
-	return (mapping->host) ? :
-		container_of(mapping, struct inode, i_data);
-}
-
 /*
  * Dynamic state flags of NILFS on-memory inode (i_state)
  */
@@ -298,6 +292,7 @@ struct nilfs_super_block **nilfs_prepare_super(struct super_block *sb,
 					       int flip);
 int nilfs_commit_super(struct super_block *sb, int flag);
 int nilfs_cleanup_super(struct super_block *sb);
+int nilfs_resize_fs(struct super_block *sb, __u64 newsize);
 int nilfs_attach_checkpoint(struct super_block *sb, __u64 cno, int curr_mnt,
 			    struct nilfs_root **root);
 int nilfs_checkpoint_is_mounted(struct super_block *sb, __u64 cno);
diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c
index 1168059c7efd..65221a04c6f0 100644
--- a/fs/nilfs2/page.c
+++ b/fs/nilfs2/page.c
@@ -37,8 +37,7 @@
 
 #define NILFS_BUFFER_INHERENT_BITS  \
 	((1UL << BH_Uptodate) | (1UL << BH_Mapped) | (1UL << BH_NILFS_Node) | \
-	 (1UL << BH_NILFS_Volatile) | (1UL << BH_NILFS_Allocated) | \
-	 (1UL << BH_NILFS_Checked))
+	 (1UL << BH_NILFS_Volatile) | (1UL << BH_NILFS_Checked))
 
 static struct buffer_head *
 __nilfs_get_page_block(struct page *page, unsigned long block, pgoff_t index,
@@ -59,19 +58,6 @@ __nilfs_get_page_block(struct page *page, unsigned long block, pgoff_t index,
 	return bh;
 }
 
-/*
- * Since the page cache of B-tree node pages or data page cache of pseudo
- * inodes does not have a valid mapping->host pointer, calling
- * mark_buffer_dirty() for their buffers causes a NULL pointer dereference;
- * it calls __mark_inode_dirty(NULL) through __set_page_dirty().
- * To avoid this problem, the old style mark_buffer_dirty() is used instead.
- */
-void nilfs_mark_buffer_dirty(struct buffer_head *bh)
-{
-	if (!buffer_dirty(bh) && !test_set_buffer_dirty(bh))
-		__set_page_dirty_nobuffers(bh->b_page);
-}
-
 struct buffer_head *nilfs_grab_buffer(struct inode *inode,
 				      struct address_space *mapping,
 				      unsigned long blkoff,
@@ -183,7 +169,7 @@ int nilfs_page_buffers_clean(struct page *page)
 void nilfs_page_bug(struct page *page)
 {
 	struct address_space *m;
-	unsigned long ino = 0;
+	unsigned long ino;
 
 	if (unlikely(!page)) {
 		printk(KERN_CRIT "NILFS_PAGE_BUG(NULL)\n");
@@ -191,11 +177,8 @@ void nilfs_page_bug(struct page *page)
 	}
 
 	m = page->mapping;
-	if (m) {
-		struct inode *inode = NILFS_AS_I(m);
-		if (inode != NULL)
-			ino = inode->i_ino;
-	}
+	ino = m ? m->host->i_ino : 0;
+
 	printk(KERN_CRIT "NILFS_PAGE_BUG(%p): cnt=%d index#=%llu flags=0x%lx "
 	       "mapping=%p ino=%lu\n",
 	       page, atomic_read(&page->_count),
@@ -217,56 +200,6 @@ void nilfs_page_bug(struct page *page)
 }
 
 /**
- * nilfs_alloc_private_page - allocate a private page with buffer heads
- *
- * Return Value: On success, a pointer to the allocated page is returned.
- * On error, NULL is returned.
- */
-struct page *nilfs_alloc_private_page(struct block_device *bdev, int size,
-				      unsigned long state)
-{
-	struct buffer_head *bh, *head, *tail;
-	struct page *page;
-
-	page = alloc_page(GFP_NOFS); /* page_count of the returned page is 1 */
-	if (unlikely(!page))
-		return NULL;
-
-	lock_page(page);
-	head = alloc_page_buffers(page, size, 0);
-	if (unlikely(!head)) {
-		unlock_page(page);
-		__free_page(page);
-		return NULL;
-	}
-
-	bh = head;
-	do {
-		bh->b_state = (1UL << BH_NILFS_Allocated) | state;
-		tail = bh;
-		bh->b_bdev = bdev;
-		bh = bh->b_this_page;
-	} while (bh);
-
-	tail->b_this_page = head;
-	attach_page_buffers(page, head);
-
-	return page;
-}
-
-void nilfs_free_private_page(struct page *page)
-{
-	BUG_ON(!PageLocked(page));
-	BUG_ON(page->mapping);
-
-	if (page_has_buffers(page) && !try_to_free_buffers(page))
-		NILFS_PAGE_BUG(page, "failed to free page");
-
-	unlock_page(page);
-	__free