[PATCH 0/6] Cleanup, remove superfluous blocksize parameter

[PATCH 0/6] Cleanup, remove superfluous blocksize parameter

[David Sterba]

First portion of cleanups that remove a parameter that's being passed to a lot
of functions, although the value does not change during the filesystem
lifetime.  This part contains the obvious and safe changes, but there are more
pending that start to touch functionality and haven't not passed xfstests
without warnings.

You can pull from

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git cleanup/blocksize-diet-part1

David Sterba (6):
  btrfs: remove unused parameter from readahead_tree_block
  btrfs: return void from readahead_tree_block
  btrfs: inline code of reada_tree_block and remove it
  btrfs: remove parameter blocksize from read_tree_block
  btrfs: remove unused parameter blocksize from btrfs_find_tree_block
  btrfs: remove blocksize from btrfs_alloc_free_block and rename

 fs/btrfs/backref.c     |  6 ++----
 fs/btrfs/ctree.c       | 54 ++++++++++++++++++++------------------------------
 fs/btrfs/ctree.h       |  6 +++---
 fs/btrfs/disk-io.c     | 37 +++++++++++-----------------------
 fs/btrfs/disk-io.h     |  7 +++----
 fs/btrfs/extent-tree.c | 20 ++++++++-----------
 fs/btrfs/ioctl.c       |  3 +--
 fs/btrfs/print-tree.c  |  1 -
 fs/btrfs/relocation.c  | 28 ++++++--------------------
 9 files changed, 57 insertions(+), 105 deletions(-)

-- 
1.8.4.5

[PATCH 1/6] btrfs: remove unused parameter from readahead_tree_block

[David Sterba]

The parent_transid parameter has been unused since its introduction in
ca7a79ad8dbe2466 ("Pass down the expected generation number when reading
tree blocks").  In reada_tree_block, it was even wrongly set to leafsize.
Transid check is done in the proper read and readahead ignores errors.

Signed-off-by: David Sterba <dsterba@suse.cz>
---
 fs/btrfs/ctree.c       | 6 +++---
 fs/btrfs/disk-io.c     | 3 +--
 fs/btrfs/disk-io.h     | 3 +--
 fs/btrfs/extent-tree.c | 3 +--
 fs/btrfs/relocation.c  | 9 ++-------
 5 files changed, 8 insertions(+), 16 deletions(-)

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 39021bf2df9a..1b7e3545a596 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2298,7 +2298,7 @@ static void reada_for_search(struct btrfs_root *root,
 		if ((search <= target && target - search <= 65536) ||
 		    (search > target && search - target <= 65536)) {
 			gen = btrfs_node_ptr_generation(node, nr);
-			readahead_tree_block(root, search, blocksize, gen);
+			readahead_tree_block(root, search, blocksize);
 			nread += blocksize;
 		}
 		nscan++;
@@ -2350,9 +2350,9 @@ static noinline void reada_for_balance(struct btrfs_root *root,
 	}
 
 	if (block1)
-		readahead_tree_block(root, block1, blocksize, 0);
+		readahead_tree_block(root, block1, blocksize);
 	if (block2)
-		readahead_tree_block(root, block2, blocksize, 0);
+		readahead_tree_block(root, block2, blocksize);
 }
 
 
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 4780e6623c7b..ff83748d39da 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1062,8 +1062,7 @@ static const struct address_space_operations btree_aops = {
 	.set_page_dirty = btree_set_page_dirty,
 };
 
-int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
-			 u64 parent_transid)
+int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize)
 {
 	struct extent_buffer *buf = NULL;
 	struct inode *btree_inode = root->fs_info->btree_inode;
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 14d06ee1e143..8cd6a53db621 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -46,8 +46,7 @@ struct btrfs_fs_devices;
 
 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
 				      u32 blocksize, u64 parent_transid);
-int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
-			 u64 parent_transid);
+int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize);
 int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
 			 int mirror_num, struct extent_buffer **eb);
 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 44d04979f071..058abd088f0f 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7486,8 +7486,7 @@ static noinline void reada_walk_down(struct btrfs_trans_handle *trans,
 				continue;
 		}
 reada:
-		ret = readahead_tree_block(root, bytenr, blocksize,
-					   generation);
+		ret = readahead_tree_block(root, bytenr, blocksize);
 		if (ret)
 			break;
 		nread++;
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 2d221c46180c..16cb2b4a9620 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -2861,13 +2861,8 @@ static int reada_tree_block(struct reloc_control *rc,
 			    struct tree_block *block)
 {
 	BUG_ON(block->key_ready);
-	if (block->key.type == BTRFS_METADATA_ITEM_KEY)
-		readahead_tree_block(rc->extent_root, block->bytenr,
-				     block->key.objectid,
-				     rc->extent_root->nodesize);
-	else
-		readahead_tree_block(rc->extent_root, block->bytenr,
-				     block->key.objectid, block->key.offset);
+	readahead_tree_block(rc->extent_root, block->bytenr,
+			block->key.objectid);
 	return 0;
 }
 
-- 
1.8.4.5

[PATCH 2/6] btrfs: return void from readahead_tree_block

[David Sterba]

Errors in readahead are not fatal and ignored elsewhere in the code.

Signed-off-by: David Sterba <dsterba@suse.cz>
---
 fs/btrfs/disk-io.c     | 6 ++----
 fs/btrfs/disk-io.h     | 2 +-
 fs/btrfs/extent-tree.c | 4 +---
 3 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index ff83748d39da..332f63518156 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1062,19 +1062,17 @@ static const struct address_space_operations btree_aops = {
 	.set_page_dirty = btree_set_page_dirty,
 };
 
-int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize)
+void readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize)
 {
 	struct extent_buffer *buf = NULL;
 	struct inode *btree_inode = root->fs_info->btree_inode;
-	int ret = 0;
 
 	buf = btrfs_find_create_tree_block(root, bytenr, blocksize);
 	if (!buf)
-		return 0;
+		return;
 	read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree,
 				 buf, 0, WAIT_NONE, btree_get_extent, 0);
 	free_extent_buffer(buf);
-	return ret;
 }
 
 int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 8cd6a53db621..0d9793f6b594 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -46,7 +46,7 @@ struct btrfs_fs_devices;
 
 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
 				      u32 blocksize, u64 parent_transid);
-int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize);
+void readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize);
 int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
 			 int mirror_num, struct extent_buffer **eb);
 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 058abd088f0f..e0468a9789a5 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7486,9 +7486,7 @@ static noinline void reada_walk_down(struct btrfs_trans_handle *trans,
 				continue;
 		}
 reada:
-		ret = readahead_tree_block(root, bytenr, blocksize);
-		if (ret)
-			break;
+		readahead_tree_block(root, bytenr, blocksize);
 		nread++;
 	}
 	wc->reada_slot = slot;
-- 
1.8.4.5

[PATCH 3/6] btrfs: inline code of reada_tree_block and remove it

[David Sterba]

It's trivial with a single user. And remove one pointless BUG_ON.

Signed-off-by: David Sterba <dsterba@suse.cz>
---
 fs/btrfs/relocation.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 16cb2b4a9620..d7506325b024 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -2857,15 +2857,6 @@ static int get_tree_block_key(struct reloc_control *rc,
 	return 0;
 }
 
-static int reada_tree_block(struct reloc_control *rc,
-			    struct tree_block *block)
-{
-	BUG_ON(block->key_ready);
-	readahead_tree_block(rc->extent_root, block->bytenr,
-			block->key.objectid);
-	return 0;
-}
-
 /*
  * helper function to relocate a tree block
  */
@@ -2945,7 +2936,8 @@ int relocate_tree_blocks(struct btrfs_trans_handle *trans,
 	while (rb_node) {
 		block = rb_entry(rb_node, struct tree_block, rb_node);
 		if (!block->key_ready)
-			reada_tree_block(rc, block);
+			readahead_tree_block(rc->extent_root, block->bytenr,
+					block->key.objectid);
 		rb_node = rb_next(rb_node);
 	}
 
-- 
1.8.4.5

[PATCH 4/6] btrfs: remove parameter blocksize from read_tree_block

[David Sterba]

We know the tree block size, no need to pass it around.

Signed-off-by: David Sterba <dsterba@suse.cz>
---
 fs/btrfs/backref.c     |  6 ++----
 fs/btrfs/ctree.c       | 10 +++-------
 fs/btrfs/disk-io.c     | 17 +++++------------
 fs/btrfs/disk-io.h     |  2 +-
 fs/btrfs/extent-tree.c |  8 +++-----
 fs/btrfs/print-tree.c  |  1 -
 fs/btrfs/relocation.c  | 11 ++++-------
 7 files changed, 18 insertions(+), 37 deletions(-)

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 6829dc5aa657..2d3e32ebfd15 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -490,7 +490,7 @@ static int __add_missing_keys(struct btrfs_fs_info *fs_info,
 			continue;
 		BUG_ON(!ref->wanted_disk_byte);
 		eb = read_tree_block(fs_info->tree_root, ref->wanted_disk_byte,
-				     fs_info->tree_root->nodesize, 0);
+				     0);
 		if (!eb || !extent_buffer_uptodate(eb)) {
 			free_extent_buffer(eb);
 			return -EIO;
@@ -1028,12 +1028,10 @@ again:
 		if (ref->count && ref->parent) {
 			if (extent_item_pos && !ref->inode_list &&
 			    ref->level == 0) {
-				u32 bsz;
 				struct extent_buffer *eb;
 
-				bsz = fs_info->extent_root->nodesize;
 				eb = read_tree_block(fs_info->extent_root,
-							   ref->parent, bsz, 0);
+							   ref->parent, 0);
 				if (!eb || !extent_buffer_uptodate(eb)) {
 					free_extent_buffer(eb);
 					ret = -EIO;
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 1b7e3545a596..302c3f955706 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1425,7 +1425,6 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
 	struct tree_mod_root *old_root = NULL;
 	u64 old_generation = 0;
 	u64 logical;
-	u32 blocksize;
 
 	eb_root = btrfs_read_lock_root_node(root);
 	tm = __tree_mod_log_oldest_root(root->fs_info, eb_root, time_seq);
@@ -1444,8 +1443,7 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
 	if (old_root && tm && tm->op != MOD_LOG_KEY_REMOVE_WHILE_FREEING) {
 		btrfs_tree_read_unlock(eb_root);
 		free_extent_buffer(eb_root);
-		blocksize = root->nodesize;
-		old = read_tree_block(root, logical, blocksize, 0);
+		old = read_tree_block(root, logical, 0);
 		if (WARN_ON(!old || !extent_buffer_uptodate(old))) {
 			free_extent_buffer(old);
 			btrfs_warn(root->fs_info,
@@ -1692,8 +1690,7 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
 			uptodate = 0;
 		if (!cur || !uptodate) {
 			if (!cur) {
-				cur = read_tree_block(root, blocknr,
-							 blocksize, gen);
+				cur = read_tree_block(root, blocknr, gen);
 				if (!cur || !extent_buffer_uptodate(cur)) {
 					free_extent_buffer(cur);
 					return -EIO;
@@ -1872,7 +1869,6 @@ static noinline struct extent_buffer *read_node_slot(struct btrfs_root *root,
 	BUG_ON(level == 0);
 
 	eb = read_tree_block(root, btrfs_node_blockptr(parent, slot),
-			     root->nodesize,
 			     btrfs_node_ptr_generation(parent, slot));
 	if (eb && !extent_buffer_uptodate(eb)) {
 		free_extent_buffer(eb);
@@ -2507,7 +2503,7 @@ read_block_for_search(struct btrfs_trans_handle *trans,
 	btrfs_release_path(p);
 
 	ret = -EAGAIN;
-	tmp = read_tree_block(root, blocknr, blocksize, 0);
+	tmp = read_tree_block(root, blocknr, 0);
 	if (tmp) {
 		/*
 		 * If the read above didn't mark this buffer up to date,
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 332f63518156..03c0973568ef 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1138,12 +1138,12 @@ int btrfs_wait_tree_block_writeback(struct extent_buffer *buf)
 }
 
 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
-				      u32 blocksize, u64 parent_transid)
+				      u64 parent_transid)
 {
 	struct extent_buffer *buf = NULL;
 	int ret;
 
-	buf = btrfs_find_create_tree_block(root, bytenr, blocksize);
+	buf = btrfs_find_create_tree_block(root, bytenr, root->nodesize);
 	if (!buf)
 		return NULL;
 
@@ -1484,7 +1484,6 @@ static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
 	struct btrfs_fs_info *fs_info = tree_root->fs_info;
 	struct btrfs_path *path;
 	u64 generation;
-	u32 blocksize;
 	int ret;
 
 	path = btrfs_alloc_path();
@@ -1509,9 +1508,8 @@ static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
 	}
 
 	generation = btrfs_root_generation(&root->root_item);
-	blocksize = root->nodesize;
 	root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
-				     blocksize, generation);
+				     generation);
 	if (!root->node) {
 		ret = -ENOMEM;
 		goto find_fail;
@@ -2139,7 +2137,6 @@ int open_ctree(struct super_block *sb,
 {
 	u32 sectorsize;
 	u32 nodesize;
-	u32 blocksize;
 	u32 stripesize;
 	u64 generation;
 	u64 features;
@@ -2643,7 +2640,6 @@ int open_ctree(struct super_block *sb,
 		goto fail_sb_buffer;
 	}
 
-	blocksize = tree_root->nodesize;
 	generation = btrfs_super_chunk_root_generation(disk_super);
 
 	__setup_root(nodesize, sectorsize, stripesize, chunk_root,
@@ -2651,7 +2647,7 @@ int open_ctree(struct super_block *sb,
 
 	chunk_root->node = read_tree_block(chunk_root,
 					   btrfs_super_chunk_root(disk_super),
-					   blocksize, generation);
+					   generation);
 	if (!chunk_root->node ||
 	    !test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) {
 		printk(KERN_WARNING "BTRFS: failed to read chunk root on %s\n",
@@ -2684,12 +2680,11 @@ int open_ctree(struct super_block *sb,
 	}
 
 retry_root_backup:
-	blocksize = tree_root->nodesize;
 	generation = btrfs_super_generation(disk_super);
 
 	tree_root->node = read_tree_block(tree_root,
 					  btrfs_super_root(disk_super),
-					  blocksize, generation);
+					  generation);
 	if (!tree_root->node ||
 	    !test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) {
 		printk(KERN_WARNING "BTRFS: failed to read tree root on %s\n",
@@ -2858,7 +2853,6 @@ retry_root_backup:
 			err = -EIO;
 			goto fail_qgroup;
 		}
-		blocksize = tree_root->nodesize;
 
 		log_tree_root = btrfs_alloc_root(fs_info);
 		if (!log_tree_root) {
@@ -2870,7 +2864,6 @@ retry_root_backup:
 			     log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID);
 
 		log_tree_root->node = read_tree_block(tree_root, bytenr,
-						      blocksize,
 						      generation + 1);
 		if (!log_tree_root->node ||
 		    !extent_buffer_uptodate(log_tree_root->node)) {
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 0d9793f6b594..03f396144fe1 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -45,7 +45,7 @@ struct btrfs_device;
 struct btrfs_fs_devices;
 
 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
-				      u32 blocksize, u64 parent_transid);
+				      u64 parent_transid);
 void readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize);
 int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
 			 int mirror_num, struct extent_buffer **eb);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index e0468a9789a5..178f6dbf2d7c 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7645,7 +7645,6 @@ walk_down:
 	level = root_level;
 	while (level >= 0) {
 		if (path->nodes[level] == NULL) {
-			int child_bsize = root->nodesize;
 			int parent_slot;
 			u64 child_gen;
 			u64 child_bytenr;
@@ -7657,8 +7656,7 @@ walk_down:
 			child_bytenr = btrfs_node_blockptr(eb, parent_slot);
 			child_gen = btrfs_node_ptr_generation(eb, parent_slot);
 
-			eb = read_tree_block(root, child_bytenr, child_bsize,
-					     child_gen);
+			eb = read_tree_block(root, child_bytenr, child_gen);
 			if (!eb || !extent_buffer_uptodate(eb)) {
 				ret = -EIO;
 				goto out;
@@ -7674,7 +7672,7 @@ walk_down:
 			ret = btrfs_qgroup_record_ref(trans, root->fs_info,
 						root->objectid,
 						child_bytenr,
-						child_bsize,
+						root->nodesize,
 						BTRFS_QGROUP_OPER_SUB_SUBTREE,
 						0);
 			if (ret)
@@ -7889,7 +7887,7 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
 	if (!next) {
 		if (reada && level == 1)
 			reada_walk_down(trans, root, wc, path);
-		next = read_tree_block(root, bytenr, blocksize, generation);
+		next = read_tree_block(root, bytenr, generation);
 		if (!next || !extent_buffer_uptodate(next)) {
 			free_extent_buffer(next);
 			return -EIO;
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index eb309855d5c8..647ab12fdf5d 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -336,7 +336,6 @@ void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
 	for (i = 0; i < nr; i++) {
 		struct extent_buffer *next = read_tree_block(root,
 					btrfs_node_blockptr(c, i),
-					root->nodesize,
 					btrfs_node_ptr_generation(c, i));
 		if (btrfs_is_leaf(next) &&
 		   level != 1)
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index d7506325b024..95bc40ae358d 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -1813,8 +1813,7 @@ again:
 				break;
 			}
 
-			eb = read_tree_block(dest, old_bytenr, blocksize,
-					     old_ptr_gen);
+			eb = read_tree_block(dest, old_bytenr, old_ptr_gen);
 			if (!eb || !extent_buffer_uptodate(eb)) {
 				ret = (!eb) ? -ENOMEM : -EIO;
 				free_extent_buffer(eb);
@@ -1944,7 +1943,6 @@ int walk_down_reloc_tree(struct btrfs_root *root, struct btrfs_path *path,
 	u64 bytenr;
 	u64 ptr_gen = 0;
 	u64 last_snapshot;
-	u32 blocksize;
 	u32 nritems;
 
 	last_snapshot = btrfs_root_last_snapshot(&root->root_item);
@@ -1970,8 +1968,7 @@ int walk_down_reloc_tree(struct btrfs_root *root, struct btrfs_path *path,
 		}
 
 		bytenr = btrfs_node_blockptr(eb, path->slots[i]);
-		blocksize = root->nodesize;
-		eb = read_tree_block(root, bytenr, blocksize, ptr_gen);
+		eb = read_tree_block(root, bytenr, ptr_gen);
 		if (!eb || !extent_buffer_uptodate(eb)) {
 			free_extent_buffer(eb);
 			return -EIO;
@@ -2680,7 +2677,7 @@ static int do_relocation(struct btrfs_trans_handle *trans,
 
 		blocksize = root->nodesize;
 		generation = btrfs_node_ptr_generation(upper->eb, slot);
-		eb = read_tree_block(root, bytenr, blocksize, generation);
+		eb = read_tree_block(root, bytenr, generation);
 		if (!eb || !extent_buffer_uptodate(eb)) {
 			free_extent_buffer(eb);
 			err = -EIO;
@@ -2842,7 +2839,7 @@ static int get_tree_block_key(struct reloc_control *rc,
 
 	BUG_ON(block->key_ready);
 	eb = read_tree_block(rc->extent_root, block->bytenr,
-			     block->key.objectid, block->key.offset);
+			     block->key.offset);
 	if (!eb || !extent_buffer_uptodate(eb)) {
 		free_extent_buffer(eb);
 		return -EIO;
-- 
1.8.4.5

[PATCH 5/6] btrfs: remove unused parameter blocksize from btrfs_find_tree_block

[David Sterba]

Signed-off-by: David Sterba <dsterba@suse.cz>
---
 fs/btrfs/ctree.c       | 12 +++++-------
 fs/btrfs/disk-io.c     |  5 ++---
 fs/btrfs/disk-io.h     |  2 +-
 fs/btrfs/extent-tree.c |  2 +-
 4 files changed, 9 insertions(+), 12 deletions(-)

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 302c3f955706..2fb4ab659a0f 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1683,7 +1683,7 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
 			continue;
 		}
 
-		cur = btrfs_find_tree_block(root, blocknr, blocksize);
+		cur = btrfs_find_tree_block(root, blocknr);
 		if (cur)
 			uptodate = btrfs_buffer_uptodate(cur, gen, 0);
 		else
@@ -2264,7 +2264,7 @@ static void reada_for_search(struct btrfs_root *root,
 
 	search = btrfs_node_blockptr(node, slot);
 	blocksize = root->nodesize;
-	eb = btrfs_find_tree_block(root, search, blocksize);
+	eb = btrfs_find_tree_block(root, search);
 	if (eb) {
 		free_extent_buffer(eb);
 		return;
@@ -2326,7 +2326,7 @@ static noinline void reada_for_balance(struct btrfs_root *root,
 	if (slot > 0) {
 		block1 = btrfs_node_blockptr(parent, slot - 1);
 		gen = btrfs_node_ptr_generation(parent, slot - 1);
-		eb = btrfs_find_tree_block(root, block1, blocksize);
+		eb = btrfs_find_tree_block(root, block1);
 		/*
 		 * if we get -eagain from btrfs_buffer_uptodate, we
 		 * don't want to return eagain here.  That will loop
@@ -2339,7 +2339,7 @@ static noinline void reada_for_balance(struct btrfs_root *root,
 	if (slot + 1 < nritems) {
 		block2 = btrfs_node_blockptr(parent, slot + 1);
 		gen = btrfs_node_ptr_generation(parent, slot + 1);
-		eb = btrfs_find_tree_block(root, block2, blocksize);
+		eb = btrfs_find_tree_block(root, block2);
 		if (eb && btrfs_buffer_uptodate(eb, gen, 1) != 0)
 			block2 = 0;
 		free_extent_buffer(eb);
@@ -2450,16 +2450,14 @@ read_block_for_search(struct btrfs_trans_handle *trans,
 {
 	u64 blocknr;
 	u64 gen;
-	u32 blocksize;
 	struct extent_buffer *b = *eb_ret;
 	struct extent_buffer *tmp;
 	int ret;
 
 	blocknr = btrfs_node_blockptr(b, slot);
 	gen = btrfs_node_ptr_generation(b, slot);
-	blocksize = root->nodesize;
 
-	tmp = btrfs_find_tree_block(root, blocknr, blocksize);
+	tmp = btrfs_find_tree_block(root, blocknr);
 	if (tmp) {
 		/* first we do an atomic uptodate check */
 		if (btrfs_buffer_uptodate(tmp, gen, 1) > 0) {
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 03c0973568ef..e0293d2fbb3a 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1108,7 +1108,7 @@ int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
 }
 
 struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
-					    u64 bytenr, u32 blocksize)
+					    u64 bytenr)
 {
 	return find_extent_buffer(root->fs_info, bytenr);
 }
@@ -4002,8 +4002,7 @@ static int btrfs_destroy_marked_extents(struct btrfs_root *root,
 
 		clear_extent_bits(dirty_pages, start, end, mark, GFP_NOFS);
 		while (start <= end) {
-			eb = btrfs_find_tree_block(root, start,
-						   root->nodesize);
+			eb = btrfs_find_tree_block(root, start);
 			start += root->nodesize;
 			if (!eb)
 				continue;
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 03f396144fe1..ae04daef6087 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -62,7 +62,7 @@ int write_ctree_super(struct btrfs_trans_handle *trans,
 struct buffer_head *btrfs_read_dev_super(struct block_device *bdev);
 int btrfs_commit_super(struct btrfs_root *root);
 struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
-					    u64 bytenr, u32 blocksize);
+					    u64 bytenr);
 struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root,
 				      struct btrfs_key *location);
 int btrfs_init_fs_root(struct btrfs_root *root);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 178f6dbf2d7c..d9a90da93302 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7825,7 +7825,7 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
 	bytenr = btrfs_node_blockptr(path->nodes[level], path->slots[level]);
 	blocksize = root->nodesize;
 
-	next = btrfs_find_tree_block(root, bytenr, blocksize);
+	next = btrfs_find_tree_block(root, bytenr);
 	if (!next) {
 		next = btrfs_find_create_tree_block(root, bytenr, blocksize);
 		if (!next)
-- 
1.8.4.5

[PATCH 6/6] btrfs: remove blocksize from btrfs_alloc_free_block and rename

[David Sterba]

Rename to btrfs_alloc_tree_block as it fits to the alloc/find/free +
_tree_block family. The parameter blocksize was set to the metadata
block size, directly or indirectly.

Signed-off-by: David Sterba <dsterba@suse.cz>
---
 fs/btrfs/ctree.c       | 26 +++++++++++---------------
 fs/btrfs/ctree.h       |  6 +++---
 fs/btrfs/disk-io.c     |  8 +++-----
 fs/btrfs/extent-tree.c |  5 +++--
 fs/btrfs/ioctl.c       |  3 +--
 5 files changed, 21 insertions(+), 27 deletions(-)

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 2fb4ab659a0f..d498982bd202 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -258,9 +258,8 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
 	else
 		btrfs_node_key(buf, &disk_key, 0);
 
-	cow = btrfs_alloc_free_block(trans, root, buf->len, 0,
-				     new_root_objectid, &disk_key, level,
-				     buf->start, 0);
+	cow = btrfs_alloc_tree_block(trans, root, 0, new_root_objectid,
+			&disk_key, level, buf->start, 0);
 	if (IS_ERR(cow))
 		return PTR_ERR(cow);
 
@@ -1133,9 +1132,9 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
 	} else
 		parent_start = 0;
 
-	cow = btrfs_alloc_free_block(trans, root, buf->len, parent_start,
-				     root->root_key.objectid, &disk_key,
-				     level, search_start, empty_size);
+	cow = btrfs_alloc_tree_block(trans, root, parent_start,
+			root->root_key.objectid, &disk_key, level,
+			search_start, empty_size);
 	if (IS_ERR(cow))
 		return PTR_ERR(cow);
 
@@ -3355,9 +3354,8 @@ static noinline int insert_new_root(struct btrfs_trans_handle *trans,
 	else
 		btrfs_node_key(lower, &lower_key, 0);
 
-	c = btrfs_alloc_free_block(trans, root, root->nodesize, 0,
-				   root->root_key.objectid, &lower_key,
-				   level, root->node->start, 0);
+	c = btrfs_alloc_tree_block(trans, root, 0, root->root_key.objectid,
+				   &lower_key, level, root->node->start, 0);
 	if (IS_ERR(c))
 		return PTR_ERR(c);
 
@@ -3495,9 +3493,8 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
 	mid = (c_nritems + 1) / 2;
 	btrfs_node_key(c, &disk_key, mid);
 
-	split = btrfs_alloc_free_block(trans, root, root->nodesize, 0,
-					root->root_key.objectid,
-					&disk_key, level, c->start, 0);
+	split = btrfs_alloc_tree_block(trans, root, 0, root->root_key.objectid,
+			&disk_key, level, c->start, 0);
 	if (IS_ERR(split))
 		return PTR_ERR(split);
 
@@ -4275,9 +4272,8 @@ again:
 	else
 		btrfs_item_key(l, &disk_key, mid);
 
-	right = btrfs_alloc_free_block(trans, root, root->nodesize, 0,
-					root->root_key.objectid,
-					&disk_key, 0, l->start, 0);
+	right = btrfs_alloc_tree_block(trans, root, 0, root->root_key.objectid,
+			&disk_key, 0, l->start, 0);
 	if (IS_ERR(right))
 		return PTR_ERR(right);
 
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 089f6da09411..3073b8876bca 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -3290,9 +3290,9 @@ struct btrfs_block_group_cache *btrfs_lookup_block_group(
 						 u64 bytenr);
 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
 int get_block_group_index(struct btrfs_block_group_cache *cache);
-struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
-					struct btrfs_root *root, u32 blocksize,
-					u64 parent, u64 root_objectid,
+struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
+					struct btrfs_root *root, u64 parent,
+					u64 root_objectid,
 					struct btrfs_disk_key *key, int level,
 					u64 hint, u64 empty_size);
 void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index e0293d2fbb3a..2e5d460d4e0c 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1324,8 +1324,7 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
 	root->root_key.type = BTRFS_ROOT_ITEM_KEY;
 	root->root_key.offset = 0;
 
-	leaf = btrfs_alloc_free_block(trans, root, root->nodesize,
-				      0, objectid, NULL, 0, 0, 0);
+	leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0);
 	if (IS_ERR(leaf)) {
 		ret = PTR_ERR(leaf);
 		leaf = NULL;
@@ -1412,9 +1411,8 @@ static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
 	 * updated (along with back refs to the log tree).
 	 */
 
-	leaf = btrfs_alloc_free_block(trans, root, root->nodesize, 0,
-				      BTRFS_TREE_LOG_OBJECTID, NULL,
-				      0, 0, 0);
+	leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID,
+			NULL, 0, 0, 0);
 	if (IS_ERR(leaf)) {
 		kfree(root);
 		return ERR_CAST(leaf);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index d9a90da93302..0ba42eb96775 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7322,8 +7322,8 @@ static void unuse_block_rsv(struct btrfs_fs_info *fs_info,
  *
  * returns the tree buffer or NULL.
  */
-struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
-					struct btrfs_root *root, u32 blocksize,
+struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
+					struct btrfs_root *root,
 					u64 parent, u64 root_objectid,
 					struct btrfs_disk_key *key, int level,
 					u64 hint, u64 empty_size)
@@ -7333,6 +7333,7 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
 	struct extent_buffer *buf;
 	u64 flags = 0;
 	int ret;
+	u32 blocksize = root->nodesize;
 	bool skinny_metadata = btrfs_fs_incompat(root->fs_info,
 						 SKINNY_METADATA);
 
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 0ff212757b95..2fc48905ccf5 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -480,8 +480,7 @@ static noinline int create_subvol(struct inode *dir,
 	if (ret)
 		goto fail;
 
-	leaf = btrfs_alloc_free_block(trans, root, root->nodesize,
-				      0, objectid, NULL, 0, 0, 0);
+	leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0);
 	if (IS_ERR(leaf)) {
 		ret = PTR_ERR(leaf);
 		goto fail;
-- 
1.8.4.5