btrfs: pull node/sector/stripe sizes out of root and into fs_info

We track the node sizes per-root, but they never vary from the values
in the superblock.  This patch messes with the 80-column style a bit,
but subsequent patches to factor out root->fs_info into a convenience
variable fix it up again.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

39 files changed, 432 insertions, 414 deletions

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 85dc7ab8f89e..45ef41f247b1 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1829,7 +1829,7 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
 	}
 	btrfs_item_key_to_cpu(path->nodes[0], found_key, path->slots[0]);
 	if (found_key->type == BTRFS_METADATA_ITEM_KEY)
-		size = fs_info->extent_root->nodesize;
+		size = fs_info->nodesize;
 	else if (found_key->type == BTRFS_EXTENT_ITEM_KEY)
 		size = found_key->offset;
 
diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index 91f6bd9124d9..a6243ccd9800 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -2911,14 +2911,14 @@ int btrfsic_mount(struct btrfs_root *root,
 	struct list_head *dev_head = &fs_devices->devices;
 	struct btrfs_device *device;
 
-	if (root->nodesize & ((u64)PAGE_SIZE - 1)) {
+	if (root->fs_info->nodesize & ((u64)PAGE_SIZE - 1)) {
 		pr_info("btrfsic: cannot handle nodesize %d not being a multiple of PAGE_SIZE %ld!\n",
-		       root->nodesize, PAGE_SIZE);
+		       root->fs_info->nodesize, PAGE_SIZE);
 		return -1;
 	}
-	if (root->sectorsize & ((u64)PAGE_SIZE - 1)) {
+	if (root->fs_info->sectorsize & ((u64)PAGE_SIZE - 1)) {
 		pr_info("btrfsic: cannot handle sectorsize %d not being a multiple of PAGE_SIZE %ld!\n",
-		       root->sectorsize, PAGE_SIZE);
+		       root->fs_info->sectorsize, PAGE_SIZE);
 		return -1;
 	}
 	state = kzalloc(sizeof(*state), GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT);
@@ -2940,8 +2940,8 @@ int btrfsic_mount(struct btrfs_root *root,
 	state->print_mask = print_mask;
 	state->include_extent_data = including_extent_data;
 	state->csum_size = 0;
-	state->metablock_size = root->nodesize;
-	state->datablock_size = root->sectorsize;
+	state->metablock_size = root->fs_info->nodesize;
+	state->datablock_size = root->fs_info->sectorsize;
 	INIT_LIST_HEAD(&state->all_blocks_list);
 	btrfsic_block_hashtable_init(&state->block_hashtable);
 	btrfsic_block_link_hashtable_init(&state->block_link_hashtable);
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index ae4c000cbffc..e4a8c3a085db 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -91,7 +91,7 @@ static inline int compressed_bio_size(struct btrfs_root *root,
 	u16 csum_size = btrfs_super_csum_size(root->fs_info->super_copy);
 
 	return sizeof(struct compressed_bio) +
-		(DIV_ROUND_UP(disk_size, root->sectorsize)) * csum_size;
+		(DIV_ROUND_UP(disk_size, root->fs_info->sectorsize)) * csum_size;
 }
 
 static struct bio *compressed_bio_alloc(struct block_device *bdev,
@@ -696,7 +696,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
 				BUG_ON(ret); /* -ENOMEM */
 			}
 			sums += DIV_ROUND_UP(comp_bio->bi_iter.bi_size,
-					     root->sectorsize);
+					     root->fs_info->sectorsize);
 
 			ret = btrfs_map_bio(root, comp_bio, mirror_num, 0);
 			if (ret) {
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 25286a5912fc..431b150a823a 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1357,8 +1357,7 @@ tree_mod_log_rewind(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
 
 	if (tm->op == MOD_LOG_KEY_REMOVE_WHILE_FREEING) {
 		BUG_ON(tm->slot != 0);
-		eb_rewin = alloc_dummy_extent_buffer(fs_info, eb->start,
-						eb->len);
+		eb_rewin = alloc_dummy_extent_buffer(fs_info, eb->start);
 		if (!eb_rewin) {
 			btrfs_tree_read_unlock_blocking(eb);
 			free_extent_buffer(eb);
@@ -1386,7 +1385,7 @@ tree_mod_log_rewind(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
 	btrfs_tree_read_lock(eb_rewin);
 	__tree_mod_log_rewind(fs_info, eb_rewin, time_seq, tm);
 	WARN_ON(btrfs_header_nritems(eb_rewin) >
-		BTRFS_NODEPTRS_PER_BLOCK(fs_info->tree_root));
+		BTRFS_NODEPTRS_PER_BLOCK(fs_info));
 
 	return eb_rewin;
 }
@@ -1439,8 +1438,7 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
 	} else if (old_root) {
 		btrfs_tree_read_unlock(eb_root);
 		free_extent_buffer(eb_root);
-		eb = alloc_dummy_extent_buffer(root->fs_info, logical,
-					root->nodesize);
+		eb = alloc_dummy_extent_buffer(root->fs_info, logical);
 	} else {
 		btrfs_set_lock_blocking_rw(eb_root, BTRFS_READ_LOCK);
 		eb = btrfs_clone_extent_buffer(eb_root);
@@ -1463,7 +1461,7 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
 		__tree_mod_log_rewind(root->fs_info, eb, time_seq, tm);
 	else
 		WARN_ON(btrfs_header_level(eb) != 0);
-	WARN_ON(btrfs_header_nritems(eb) > BTRFS_NODEPTRS_PER_BLOCK(root));
+	WARN_ON(btrfs_header_nritems(eb) > BTRFS_NODEPTRS_PER_BLOCK(root->fs_info));
 
 	return eb;
 }
@@ -1634,7 +1632,7 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
 	WARN_ON(trans->transid != root->fs_info->generation);
 
 	parent_nritems = btrfs_header_nritems(parent);
-	blocksize = root->nodesize;
+	blocksize = root->fs_info->nodesize;
 	end_slot = parent_nritems - 1;
 
 	if (parent_nritems <= 1)
@@ -1940,7 +1938,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
 		return 0;
 	}
 	if (btrfs_header_nritems(mid) >
-	    BTRFS_NODEPTRS_PER_BLOCK(root) / 4)
+	    BTRFS_NODEPTRS_PER_BLOCK(root->fs_info) / 4)
 		return 0;
 
 	left = read_node_slot(root, parent, pslot - 1);
@@ -2127,7 +2125,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
 		btrfs_set_lock_blocking(left);
 
 		left_nr = btrfs_header_nritems(left);
-		if (left_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
+		if (left_nr >= BTRFS_NODEPTRS_PER_BLOCK(root->fs_info) - 1) {
 			wret = 1;
 		} else {
 			ret = btrfs_cow_block(trans, root, left, parent,
@@ -2181,7 +2179,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
 		btrfs_set_lock_blocking(right);
 
 		right_nr = btrfs_header_nritems(right);
-		if (right_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) {
+		if (right_nr >= BTRFS_NODEPTRS_PER_BLOCK(root->fs_info) - 1) {
 			wret = 1;
 		} else {
 			ret = btrfs_cow_block(trans, root, right,
@@ -2252,7 +2250,7 @@ static void reada_for_search(struct btrfs_root *root,
 	node = path->nodes[level];
 
 	search = btrfs_node_blockptr(node, slot);
-	blocksize = root->nodesize;
+	blocksize = root->fs_info->nodesize;
 	eb = find_extent_buffer(root->fs_info, search);
 	if (eb) {
 		free_extent_buffer(eb);
@@ -2521,7 +2519,7 @@ setup_nodes_for_search(struct btrfs_trans_handle *trans,
 {
 	int ret;
 	if ((p->search_for_split || ins_len > 0) && btrfs_header_nritems(b) >=
-	    BTRFS_NODEPTRS_PER_BLOCK(root) - 3) {
+	    BTRFS_NODEPTRS_PER_BLOCK(root->fs_info) - 3) {
 		int sret;
 
 		if (*write_lock_level < level + 1) {
@@ -2542,7 +2540,7 @@ setup_nodes_for_search(struct btrfs_trans_handle *trans,
 		}
 		b = p->nodes[level];
 	} else if (ins_len < 0 && btrfs_header_nritems(b) <
-		   BTRFS_NODEPTRS_PER_BLOCK(root) / 2) {
+		   BTRFS_NODEPTRS_PER_BLOCK(root->fs_info) / 2) {
 		int sret;
 
 		if (*write_lock_level < level + 1) {
@@ -3195,7 +3193,7 @@ static int push_node_left(struct btrfs_trans_handle *trans,
 
 	src_nritems = btrfs_header_nritems(src);
 	dst_nritems = btrfs_header_nritems(dst);
-	push_items = BTRFS_NODEPTRS_PER_BLOCK(root) - dst_nritems;
+	push_items = BTRFS_NODEPTRS_PER_BLOCK(root->fs_info) - dst_nritems;
 	WARN_ON(btrfs_header_generation(src) != trans->transid);
 	WARN_ON(btrfs_header_generation(dst) != trans->transid);
 
@@ -3274,7 +3272,7 @@ static int balance_node_right(struct btrfs_trans_handle *trans,
 
 	src_nritems = btrfs_header_nritems(src);
 	dst_nritems = btrfs_header_nritems(dst);
-	push_items = BTRFS_NODEPTRS_PER_BLOCK(root) - dst_nritems;
+	push_items = BTRFS_NODEPTRS_PER_BLOCK(root->fs_info) - dst_nritems;
 	if (push_items <= 0)
 		return 1;
 
@@ -3346,7 +3344,7 @@ static noinline int insert_new_root(struct btrfs_trans_handle *trans,
 	if (IS_ERR(c))
 		return PTR_ERR(c);
 
-	root_add_used(root, root->nodesize);
+	root_add_used(root, root->fs_info->nodesize);
 
 	memzero_extent_buffer(c, 0, sizeof(struct btrfs_header));
 	btrfs_set_header_nritems(c, 1);
@@ -3404,7 +3402,7 @@ static void insert_ptr(struct btrfs_trans_handle *trans,
 	lower = path->nodes[level];
 	nritems = btrfs_header_nritems(lower);
 	BUG_ON(slot > nritems);
-	BUG_ON(nritems == BTRFS_NODEPTRS_PER_BLOCK(root));
+	BUG_ON(nritems == BTRFS_NODEPTRS_PER_BLOCK(root->fs_info));
 	if (slot != nritems) {
 		if (level)
 			tree_mod_log_eb_move(root->fs_info, lower, slot + 1,
@@ -3467,7 +3465,7 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
 		ret = push_nodes_for_insert(trans, root, path, level);
 		c = path->nodes[level];
 		if (!ret && btrfs_header_nritems(c) <
-		    BTRFS_NODEPTRS_PER_BLOCK(root) - 3)
+		    BTRFS_NODEPTRS_PER_BLOCK(root->fs_info) - 3)
 			return 0;
 		if (ret < 0)
 			return ret;
@@ -3482,7 +3480,7 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
 	if (IS_ERR(split))
 		return PTR_ERR(split);
 
-	root_add_used(root, root->nodesize);
+	root_add_used(root, root->fs_info->nodesize);
 
 	memzero_extent_buffer(split, 0, sizeof(struct btrfs_header));
 	btrfs_set_header_level(split, btrfs_header_level(c));
@@ -3564,11 +3562,12 @@ noinline int btrfs_leaf_free_space(struct btrfs_root *root,
 {
 	int nritems = btrfs_header_nritems(leaf);
 	int ret;
-	ret = BTRFS_LEAF_DATA_SIZE(root) - leaf_space_used(leaf, 0, nritems);
+	ret = BTRFS_LEAF_DATA_SIZE(root->fs_info) - leaf_space_used(leaf, 0, nritems);
 	if (ret < 0) {
 		btrfs_crit(root->fs_info,
 			"leaf free space ret %d, leaf data size %lu, used %d nritems %d",
-		       ret, (unsigned long) BTRFS_LEAF_DATA_SIZE(root),
+		       ret,
+		       (unsigned long) BTRFS_LEAF_DATA_SIZE(root->fs_info),
 		       leaf_space_used(leaf, 0, nritems), nritems);
 	}
 	return ret;
@@ -3655,11 +3654,11 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans,
 	memmove_extent_buffer(right,
 			      btrfs_leaf_data(right) + data_end - push_space,
 			      btrfs_leaf_data(right) + data_end,
-			      BTRFS_LEAF_DATA_SIZE(root) - data_end);
+			      BTRFS_LEAF_DATA_SIZE(root->fs_info) - data_end);
 
 	/* copy from the left data area */
 	copy_extent_buffer(right, left, btrfs_leaf_data(right) +
-		     BTRFS_LEAF_DATA_SIZE(root) - push_space,
+		     BTRFS_LEAF_DATA_SIZE(root->fs_info) - push_space,
 		     btrfs_leaf_data(left) + leaf_data_end(root, left),
 		     push_space);
 
@@ -3675,7 +3674,7 @@ static noinline int __push_leaf_right(struct btrfs_trans_handle *trans,
 	/* update the item pointers */
 	right_nritems += push_items;
 	btrfs_set_header_nritems(right, right_nritems);
-	push_space = BTRFS_LEAF_DATA_SIZE(root);
+	push_space = BTRFS_LEAF_DATA_SIZE(root->fs_info);
 	for (i = 0; i < right_nritems; i++) {
 		item = btrfs_item_nr(i);
 		push_space -= btrfs_token_item_size(right, item, &token);
@@ -3871,7 +3870,7 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans,
 			   btrfs_item_nr_offset(0),
 			   push_items * sizeof(struct btrfs_item));
 
-	push_space = BTRFS_LEAF_DATA_SIZE(root) -
+	push_space = BTRFS_LEAF_DATA_SIZE(root->fs_info) -
 		     btrfs_item_offset_nr(right, push_items - 1);
 
 	copy_extent_buffer(left, right, btrfs_leaf_data(left) +
@@ -3890,7 +3889,7 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans,
 
 		ioff = btrfs_token_item_offset(left, item, &token);
 		btrfs_set_token_item_offset(left, item,
-		      ioff - (BTRFS_LEAF_DATA_SIZE(root) - old_left_item_size),
+		      ioff - (BTRFS_LEAF_DATA_SIZE(root->fs_info) - old_left_item_size),
 		      &token);
 	}
 	btrfs_set_header_nritems(left, old_left_nritems + push_items);
@@ -3904,7 +3903,7 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans,
 		push_space = btrfs_item_offset_nr(right, push_items - 1) -
 						  leaf_data_end(root, right);
 		memmove_extent_buffer(right, btrfs_leaf_data(right) +
-				      BTRFS_LEAF_DATA_SIZE(root) - push_space,
+				      BTRFS_LEAF_DATA_SIZE(root->fs_info) - push_space,
 				      btrfs_leaf_data(right) +
 				      leaf_data_end(root, right), push_space);
 
@@ -3915,7 +3914,7 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans,
 	}
 	right_nritems -= push_items;
 	btrfs_set_header_nritems(right, right_nritems);
-	push_space = BTRFS_LEAF_DATA_SIZE(root);
+	push_space = BTRFS_LEAF_DATA_SIZE(root->fs_info);
 	for (i = 0; i < right_nritems; i++) {
 		item = btrfs_item_nr(i);
 
@@ -4054,11 +4053,11 @@ static noinline void copy_for_split(struct btrfs_trans_handle *trans,
 			   nritems * sizeof(struct btrfs_item));
 
 	copy_extent_buffer(right, l,
-		     btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root) -
+		     btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root->fs_info) -
 		     data_copy_size, btrfs_leaf_data(l) +
 		     leaf_data_end(root, l), data_copy_size);
 
-	rt_data_off = BTRFS_LEAF_DATA_SIZE(root) -
+	rt_data_off = BTRFS_LEAF_DATA_SIZE(root->fs_info) -
 		      btrfs_item_end_nr(l, mid);
 
 	for (i = 0; i < nritems; i++) {
@@ -4182,7 +4181,7 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
 	l = path->nodes[0];
 	slot = path->slots[0];
 	if (extend && data_size + btrfs_item_size_nr(l, slot) +
-	    sizeof(struct btrfs_item) > BTRFS_LEAF_DATA_SIZE(root))
+	    sizeof(struct btrfs_item) > BTRFS_LEAF_DATA_SIZE(root->fs_info))
 		return -EOVERFLOW;
 
 	/* first try to make some room by pushing left and right */
@@ -4224,14 +4223,14 @@ again:
 	if (mid <= slot) {
 		if (nritems == 1 ||
 		    leaf_space_used(l, mid, nritems - mid) + data_size >
-			BTRFS_LEAF_DATA_SIZE(root)) {
+			BTRFS_LEAF_DATA_SIZE(root->fs_info)) {
 			if (slot >= nritems) {
 				split = 0;
 			} else {
 				mid = slot;
 				if (mid != nritems &&
 				    leaf_space_used(l, mid, nritems - mid) +
-				    data_size > BTRFS_LEAF_DATA_SIZE(root)) {
+				    data_size > BTRFS_LEAF_DATA_SIZE(root->fs_info)) {
 					if (data_size && !tried_avoid_double)
 						goto push_for_double;
 					split = 2;
@@ -4240,7 +4239,7 @@ again:
 		}
 	} else {
 		if (leaf_space_used(l, 0, mid) + data_size >
-			BTRFS_LEAF_DATA_SIZE(root)) {
+			BTRFS_LEAF_DATA_SIZE(root->fs_info)) {
 			if (!extend && data_size && slot == 0) {
 				split = 0;
 			} else if ((extend || !data_size) && slot == 0) {
@@ -4249,7 +4248,7 @@ again:
 				mid = slot;
 				if (mid != nritems &&
 				    leaf_space_used(l, mid, nritems - mid) +
-				    data_size > BTRFS_LEAF_DATA_SIZE(root)) {
+				    data_size > BTRFS_LEAF_DATA_SIZE(root->fs_info)) {
 					if (data_size && !tried_avoid_double)
 						goto push_for_double;
 					split = 2;
@@ -4268,7 +4267,7 @@ again:
 	if (IS_ERR(right))
 		return PTR_ERR(right);
 
-	root_add_used(root, root->nodesize);
+	root_add_used(root, root->fs_info->nodesize);
 
 	memzero_extent_buffer(right, 0, sizeof(struct btrfs_header));
 	btrfs_set_header_bytenr(right, right->start);
@@ -5001,7 +5000,7 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 		}
 
 		/* delete the leaf if it is mostly empty */
-		if (used < BTRFS_LEAF_DATA_SIZE(root) / 3) {
+		if (used < BTRFS_LEAF_DATA_SIZE(root->fs_info) / 3) {
 			/* push_leaf_left fixes the path.
 			 * make sure the path still points to our leaf
 			 * for possible call to del_ptr below
@@ -5369,9 +5368,10 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
 		goto out;
 	}
 
-	tmp_buf = kmalloc(left_root->nodesize, GFP_KERNEL | __GFP_NOWARN);
+	tmp_buf = kmalloc(left_root->fs_info->nodesize,
+			  GFP_KERNEL | __GFP_NOWARN);
 	if (!tmp_buf) {
-		tmp_buf = vmalloc(left_root->nodesize);
+		tmp_buf = vmalloc(left_root->fs_info->nodesize);
 		if (!tmp_buf) {
 			ret = -ENOMEM;
 			goto out;
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 15ff880bf4b5..6a5c0072a72b 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -337,7 +337,7 @@ struct btrfs_path {
 	unsigned int need_commit_sem:1;
 	unsigned int skip_release_on_error:1;
 };
-#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
+#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
 					sizeof(struct btrfs_item))
 struct btrfs_dev_replace {
 	u64 replace_state;	/* see #define above */
@@ -1084,8 +1084,18 @@ struct btrfs_fs_info {
 
 	/* Used to record internally whether fs has been frozen */
 	int fs_frozen;
+
+	/* Cached block sizes */
+	u32 nodesize;
+	u32 sectorsize;
+	u32 stripesize;
 };
 
+static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
+{
+	return sb->s_fs_info;
+}
+
 struct btrfs_subvolume_writers {
 	struct percpu_counter	counter;
 	wait_queue_head_t	wait;
@@ -1159,14 +1169,6 @@ struct btrfs_root {
 	u64 objectid;
 	u64 last_trans;
 
-	/* data allocations are done in sectorsize units */
-	u32 sectorsize;
-
-	/* node allocations are done in nodesize units */
-	u32 nodesize;
-
-	u32 stripesize;
-
 	u32 type;
 
 	u64 highest_objectid;
@@ -1250,38 +1252,42 @@ struct btrfs_root {
 	/* For qgroup metadata space reserve */
 	atomic_t qgroup_meta_rsv;
 };
+static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
+{
+	return btrfs_sb(inode->i_sb)->sectorsize;
+}
 
 static inline u32 __BTRFS_LEAF_DATA_SIZE(u32 blocksize)
 {
 	return blocksize - sizeof(struct btrfs_header);
 }
 
-static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_root *root)
+static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
 {
-	return __BTRFS_LEAF_DATA_SIZE(root->nodesize);
+	return __BTRFS_LEAF_DATA_SIZE(info->nodesize);
 }
 
-static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_root *root)
+static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
 {
-	return BTRFS_LEAF_DATA_SIZE(root) - sizeof(struct btrfs_item);
+	return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
 }
 
-static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_root *root)
+static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
 {
-	return BTRFS_LEAF_DATA_SIZE(root) / sizeof(struct btrfs_key_ptr);
+	return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
 }
 
 #define BTRFS_FILE_EXTENT_INLINE_DATA_START		\
 		(offsetof(struct btrfs_file_extent_item, disk_bytenr))
-static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_root *root)
+static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
 {
-	return BTRFS_MAX_ITEM_SIZE(root) -
+	return BTRFS_MAX_ITEM_SIZE(info) -
 	       BTRFS_FILE_EXTENT_INLINE_DATA_START;
 }
 
-static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_root *root)
+static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
 {
-	return BTRFS_MAX_ITEM_SIZE(root) - sizeof(struct btrfs_dir_item);
+	return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
 }
 
 /*
@@ -2309,7 +2315,7 @@ static inline unsigned int leaf_data_end(struct btrfs_root *root,
 	u32 nr = btrfs_header_nritems(leaf);
 
 	if (nr == 0)
-		return BTRFS_LEAF_DATA_SIZE(root);
+		return BTRFS_LEAF_DATA_SIZE(root->fs_info);
 	return btrfs_item_offset_nr(leaf, nr - 1);
 }
 
@@ -2505,11 +2511,6 @@ BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
 			 struct btrfs_dev_replace_item, cursor_right, 64);
 
-static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
-{
-	return sb->s_fs_info;
-}
-
 /* helper function to cast into the data area of the leaf. */
 #define btrfs_item_ptr(leaf, slot, type) \
 	((type *)(btrfs_leaf_data(leaf) + \
@@ -2537,7 +2538,7 @@ u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
 						 unsigned num_items)
 {
-	return root->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
+	return root->fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
 }
 
 /*
@@ -2547,7 +2548,7 @@ static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
 						 unsigned num_items)
 {
-	return root->nodesize * BTRFS_MAX_LEVEL * num_items;
+	return root->fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
 }
 
 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index 0dc1a033275e..79233ab69ae5 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -79,7 +79,7 @@ int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
 	struct extent_buffer *leaf;
 	u32 data_size;
 
-	BUG_ON(name_len + data_len > BTRFS_MAX_XATTR_SIZE(root));
+	BUG_ON(name_len + data_len > BTRFS_MAX_XATTR_SIZE(root->fs_info));
 
 	key.objectid = objectid;
 	key.type = BTRFS_XATTR_ITEM_KEY;
@@ -261,7 +261,7 @@ int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
 	leaf = path->nodes[0];
 	slot = path->slots[0];
 	if (data_size + btrfs_item_size_nr(leaf, slot) +
-	    sizeof(struct btrfs_item) > BTRFS_LEAF_DATA_SIZE(root)) {
+	    sizeof(struct btrfs_item) > BTRFS_LEAF_DATA_SIZE(root->fs_info)) {
 		ret = -EOVERFLOW;
 	} else {
 		/* plenty of insertion room */
@@ -471,7 +471,7 @@ int verify_dir_item(struct btrfs_root *root,
 
 	/* BTRFS_MAX_XATTR_SIZE is the same for all dir items */
 	if ((btrfs_dir_data_len(leaf, dir_item) +
-	     btrfs_dir_name_len(leaf, dir_item)) > BTRFS_MAX_XATTR_SIZE(root)) {
+	     btrfs_dir_name_len(leaf, dir_item)) > BTRFS_MAX_XATTR_SIZE(root->fs_info)) {
 		btrfs_crit(root->fs_info,
 			   "invalid dir item name + data len: %u + %u",
 			   (unsigned)btrfs_dir_name_len(leaf, dir_item),
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 83848314e12f..3d4fb99d9e4f 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -585,7 +585,7 @@ static noinline int check_leaf(struct btrfs_root *root,
 
 	/* Check the 0 item */
 	if (btrfs_item_offset_nr(leaf, 0) + btrfs_item_size_nr(leaf, 0) !=
-	    BTRFS_LEAF_DATA_SIZE(root)) {
+	    BTRFS_LEAF_DATA_SIZE(root->fs_info)) {
 		CORRUPT("invalid item offset size pair", leaf, root, 0);
 		return -EIO;
 	}
@@ -624,7 +624,7 @@ static noinline int check_leaf(struct btrfs_root *root,
 		 * all point outside of the leaf.
 		 */
 		if (btrfs_item_end_nr(leaf, slot) >
-		    BTRFS_LEAF_DATA_SIZE(root)) {
+		    BTRFS_LEAF_DATA_SIZE(root->fs_info)) {
 			CORRUPT("slot end outside of leaf", leaf, root, slot);
 			return -EIO;
 		}
@@ -641,7 +641,7 @@ static int check_node(struct btrfs_root *root, struct extent_buffer *node)
 	u64 bytenr;
 	int ret = 0;
 
-	if (nr == 0 || nr > BTRFS_NODEPTRS_PER_BLOCK(root)) {
+	if (nr == 0 || nr > BTRFS_NODEPTRS_PER_BLOCK(root->fs_info)) {
 		btrfs_crit(root->fs_info,
 			   "corrupt node: block %llu root %llu nritems %lu",
 			   node->start, root->objectid, nr);
@@ -1195,8 +1195,7 @@ struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
 						 u64 bytenr)
 {
 	if (btrfs_is_testing(root->fs_info))
-		return alloc_test_extent_buffer(root->fs_info, bytenr,
-				root->nodesize);
+		return alloc_test_extent_buffer(root->fs_info, bytenr);
 	return alloc_extent_buffer(root->fs_info, bytenr);
 }
 
@@ -1277,16 +1276,12 @@ btrfs_free_subvolume_writers(struct btrfs_subvolume_writers *writers)
 	kfree(writers);
 }
 
-static void __setup_root(u32 nodesize, u32 sectorsize, u32 stripesize,
-			 struct btrfs_root *root, struct btrfs_fs_info *fs_info,
+static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
 			 u64 objectid)
 {
 	bool dummy = test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
 	root->node = NULL;
 	root->commit_root = NULL;
-	root->sectorsize = sectorsize;
-	root->nodesize = nodesize;
-	root->stripesize = stripesize;
 	root->state = 0;
 	root->orphan_cleanup_state = 0;
 
@@ -1364,8 +1359,7 @@ static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info,
 
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 /* Should only be used by the testing infrastructure */
-struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info,
-					  u32 sectorsize, u32 nodesize)
+struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info)
 {
 	struct btrfs_root *root;
 
@@ -1375,9 +1369,9 @@ struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info,
 	root = btrfs_alloc_root(fs_info, GFP_KERNEL);
 	if (!root)
 		return ERR_PTR(-ENOMEM);
+
 	/* We don't use the stripesize in selftest, set it as sectorsize */
-	__setup_root(nodesize, sectorsize, sectorsize, root, fs_info,
-			BTRFS_ROOT_TREE_OBJECTID);
+	__setup_root(root, fs_info, BTRFS_ROOT_TREE_OBJECTID);
 	root->alloc_bytenr = 0;
 
 	return root;
@@ -1399,8 +1393,7 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
 	if (!root)
 		return ERR_PTR(-ENOMEM);
 
-	__setup_root(tree_root->nodesize, tree_root->sectorsize,
-		tree_root->stripesize, root, fs_info, objectid);
+	__setup_root(root, fs_info, objectid);
 	root->root_key.objectid = objectid;
 	root->root_key.type = BTRFS_ROOT_ITEM_KEY;
 	root->root_key.offset = 0;
@@ -1465,16 +1458,13 @@ static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
 					 struct btrfs_fs_info *fs_info)
 {
 	struct btrfs_root *root;
-	struct btrfs_root *tree_root = fs_info->tree_root;
 	struct extent_buffer *leaf;
 
 	root = btrfs_alloc_root(fs_info, GFP_NOFS);
 	if (!root)
 		return ERR_PTR(-ENOMEM);
 
-	__setup_root(tree_root->nodesize, tree_root->sectorsize,
-		     tree_root->stripesize, root, fs_info,
-		     BTRFS_TREE_LOG_OBJECTID);
+	__setup_root(root, fs_info, BTRFS_TREE_LOG_OBJECTID);
 
 	root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID;
 	root->root_key.type = BTRFS_ROOT_ITEM_KEY;
@@ -1539,7 +1529,8 @@ int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
 	btrfs_set_stack_inode_generation(inode_item, 1);
 	btrfs_set_stack_inode_size(inode_item, 3);
 	btrfs_set_stack_inode_nlink(inode_item, 1);
-	btrfs_set_stack_inode_nbytes(inode_item, root->nodesize);
+	btrfs_set_stack_inode_nbytes(inode_item,
+				     root->fs_info->nodesize);
 	btrfs_set_stack_inode_mode(inode_item, S_IFDIR | 0755);
 
 	btrfs_set_root_node(&log_root->root_item, log_root->node);
@@ -1571,8 +1562,7 @@ static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
 		goto alloc_fail;
 	}
 
-	__setup_root(tree_root->nodesize, tree_root->sectorsize,
-		tree_root->stripesize, root, fs_info, key->objectid);
+	__setup_root(root, fs_info, key->objectid);
 
 	ret = btrfs_find_root(tree_root, key, path,
 			      &root->root_item, &root->root_key);
@@ -2456,9 +2446,7 @@ static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
 	if (!log_tree_root)
 		return -ENOMEM;
 
-	__setup_root(tree_root->nodesize, tree_root->sectorsize,
-			tree_root->stripesize, log_tree_root, fs_info,