Commit dc0ce61a authored by Joel Becker's avatar Joel Becker Committed by Mark Fasheh
Browse files

ocfs2: Make ocfs2_extent_tree get/put instead of alloc. 



Rather than allocating a struct ocfs2_extent_tree, just put it on the
stack.  Fill it with ocfs2_get_extent_tree() and drop it with
ocfs2_put_extent_tree().  Now the callers don't have to ENOMEM, yet
still safely ref the root_bh.

Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
Signed-off-by: default avatarMark Fasheh <mfasheh@suse.com>
parent ce1d9ea6

fs/ocfs2/alloc.c

+36 −81
Original line number Diff line number Diff line
@@ -223,22 +223,17 @@ static struct ocfs2_extent_tree_operations ocfs2_xattr_tree_et_ops = { 
	.eo_sanity_check	= ocfs2_xattr_tree_sanity_check,

};



static struct ocfs2_extent_tree*

	 ocfs2_new_extent_tree(struct inode *inode,

static void ocfs2_get_extent_tree(struct ocfs2_extent_tree *et,

				  struct inode *inode,

				  struct buffer_head *bh,

				  enum ocfs2_extent_tree_type et_type,

				  void *private)

{

	struct ocfs2_extent_tree *et;



	et = kzalloc(sizeof(*et), GFP_NOFS);

	if (!et)

		return NULL;



	et->et_type = et_type;

	get_bh(bh);

	et->et_root_bh = bh;

	et->et_private = private;

	et->et_max_leaf_clusters = 0;



	if (et_type == OCFS2_DINODE_EXTENT) {

		et->et_root_el =
@@ -257,16 +252,11 @@ static struct ocfs2_extent_tree* 
		et->et_max_leaf_clusters = ocfs2_clusters_for_bytes(inode->i_sb,

						OCFS2_MAX_XATTR_TREE_LEAF_SIZE);

	}



	return et;

}



static void ocfs2_free_extent_tree(struct ocfs2_extent_tree *et)

static void ocfs2_put_extent_tree(struct ocfs2_extent_tree *et)

{

	if (et) {

	brelse(et->et_root_bh);

		kfree(et);

	}

}



static inline void ocfs2_et_set_last_eb_blk(struct ocfs2_extent_tree *et,
@@ -4430,22 +4420,15 @@ int ocfs2_dinode_insert_extent(struct ocfs2_super *osb, 
			       struct ocfs2_alloc_context *meta_ac)

{

	int status;

	struct ocfs2_extent_tree *et = NULL;



	et = ocfs2_new_extent_tree(inode, root_bh, OCFS2_DINODE_EXTENT, NULL);

	if (!et) {

		status = -ENOMEM;

		mlog_errno(status);

		goto bail;

	}

	struct ocfs2_extent_tree et;



	ocfs2_get_extent_tree(&et, inode, root_bh, OCFS2_DINODE_EXTENT,

			      NULL);

	status = ocfs2_insert_extent(osb, handle, inode, root_bh,

				     cpos, start_blk, new_clusters,

				     flags, meta_ac, et);

				     flags, meta_ac, &et);

	ocfs2_put_extent_tree(&et);



	if (et)

		ocfs2_free_extent_tree(et);

bail:

	return status;

}
@@ -4461,23 +4444,15 @@ int ocfs2_xattr_value_insert_extent(struct ocfs2_super *osb, 
				    void *private)

{

	int status;

	struct ocfs2_extent_tree *et = NULL;

	struct ocfs2_extent_tree et;



	et = ocfs2_new_extent_tree(inode, root_bh,

	ocfs2_get_extent_tree(&et, inode, root_bh,

			      OCFS2_XATTR_VALUE_EXTENT, private);

	if (!et) {

		status = -ENOMEM;

		mlog_errno(status);

		goto bail;

	}



	status = ocfs2_insert_extent(osb, handle, inode, root_bh,

				     cpos, start_blk, new_clusters,

				     flags, meta_ac, et);

				     flags, meta_ac, &et);

	ocfs2_put_extent_tree(&et);



	if (et)

		ocfs2_free_extent_tree(et);

bail:

	return status;

}
@@ -4492,23 +4467,15 @@ int ocfs2_xattr_tree_insert_extent(struct ocfs2_super *osb, 
				   struct ocfs2_alloc_context *meta_ac)

{

	int status;

	struct ocfs2_extent_tree *et = NULL;

	struct ocfs2_extent_tree et;



	et = ocfs2_new_extent_tree(inode, root_bh, OCFS2_XATTR_TREE_EXTENT,

	ocfs2_get_extent_tree(&et, inode, root_bh, OCFS2_XATTR_TREE_EXTENT,

			      NULL);

	if (!et) {

		status = -ENOMEM;

		mlog_errno(status);

		goto bail;

	}



	status = ocfs2_insert_extent(osb, handle, inode, root_bh,

				     cpos, start_blk, new_clusters,

				     flags, meta_ac, et);

				     flags, meta_ac, &et);

	ocfs2_put_extent_tree(&et);



	if (et)

		ocfs2_free_extent_tree(et);

bail:

	return status;

}
@@ -4897,11 +4864,13 @@ int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh, 
	struct ocfs2_extent_rec split_rec;

	struct ocfs2_path *left_path = NULL;

	struct ocfs2_extent_list *el;

	struct ocfs2_extent_tree *et = NULL;

	struct ocfs2_extent_tree et;



	mlog(0, "Inode %lu cpos %u, len %u, phys %u (%llu)\n",

	     inode->i_ino, cpos, len, phys, (unsigned long long)start_blkno);



	ocfs2_get_extent_tree(&et, inode, root_bh, et_type, private);



	if (!ocfs2_writes_unwritten_extents(OCFS2_SB(inode->i_sb))) {

		ocfs2_error(inode->i_sb, "Inode %llu has unwritten extents "

			    "that are being written to, but the feature bit "
@@ -4911,13 +4880,6 @@ int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh, 
		goto out;

	}



	et = ocfs2_new_extent_tree(inode, root_bh, et_type, private);

	if (!et) {

		ret = -ENOMEM;

		mlog_errno(ret);

		goto out;

	}



	/*

	 * XXX: This should be fixed up so that we just re-insert the

	 * next extent records.
@@ -4925,7 +4887,7 @@ int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh, 
	if (et_type == OCFS2_DINODE_EXTENT)

		ocfs2_extent_map_trunc(inode, 0);



	left_path = ocfs2_new_path(et->et_root_bh, et->et_root_el);

	left_path = ocfs2_new_path(et.et_root_bh, et.et_root_el);

	if (!left_path) {

		ret = -ENOMEM;

		mlog_errno(ret);
@@ -4956,7 +4918,7 @@ int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh, 
	split_rec.e_flags = path_leaf_el(left_path)->l_recs[index].e_flags;

	split_rec.e_flags &= ~OCFS2_EXT_UNWRITTEN;



	ret = __ocfs2_mark_extent_written(inode, et, handle, left_path,

	ret = __ocfs2_mark_extent_written(inode, &et, handle, left_path,

					  index, &split_rec, meta_ac,

					  dealloc);

	if (ret)
@@ -4964,8 +4926,7 @@ int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh, 


out:

	ocfs2_free_path(left_path);

	if (et)

		ocfs2_free_extent_tree(et);

	ocfs2_put_extent_tree(&et);

	return ret;

}
@@ -5207,18 +5168,13 @@ int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh, 
	struct ocfs2_extent_rec *rec;

	struct ocfs2_extent_list *el;

	struct ocfs2_path *path = NULL;

	struct ocfs2_extent_tree *et = NULL;

	struct ocfs2_extent_tree et;



	et = ocfs2_new_extent_tree(inode, root_bh, et_type, private);

	if (!et) {

		ret = -ENOMEM;

		mlog_errno(ret);

		goto out;

	}

	ocfs2_get_extent_tree(&et, inode, root_bh, et_type, private);



	ocfs2_extent_map_trunc(inode, 0);



	path = ocfs2_new_path(et->et_root_bh, et->et_root_el);

	path = ocfs2_new_path(et.et_root_bh, et.et_root_el);

	if (!path) {

		ret = -ENOMEM;

		mlog_errno(ret);
@@ -5271,13 +5227,13 @@ int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh, 


	if (le32_to_cpu(rec->e_cpos) == cpos || rec_range == trunc_range) {

		ret = ocfs2_truncate_rec(inode, handle, path, index, dealloc,

					 cpos, len, et);

					 cpos, len, &et);

		if (ret) {

			mlog_errno(ret);

			goto out;

		}

	} else {

		ret = ocfs2_split_tree(inode, et, handle, path, index,

		ret = ocfs2_split_tree(inode, &et, handle, path, index,

				       trunc_range, meta_ac);

		if (ret) {

			mlog_errno(ret);
@@ -5326,7 +5282,7 @@ int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh, 
		}



		ret = ocfs2_truncate_rec(inode, handle, path, index, dealloc,

					 cpos, len, et);

					 cpos, len, &et);

		if (ret) {

			mlog_errno(ret);

			goto out;
@@ -5335,8 +5291,7 @@ int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh, 


out:

	ocfs2_free_path(path);

	if (et)

		ocfs2_free_extent_tree(et);

	ocfs2_put_extent_tree(&et);

	return ret;

}

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