ocfs2: budget for extent tree splits when adding refcount flag (3e10b793) · Commits · 戴 / test

When we're adding the refcount flag to an extent, we have to budget enough space to handle a full extent btree split in addition to whatever modifications have to be made to the refcount btree. We don't currently do this, with the result that generic/186 crashes when we need an extent split but not a refcount split because meta_ac never gets allocated. Signed-off-by:

Darrick J. Wong <darrick.wong@oracle.com>

fs/ocfs2/refcounttree.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -3692,6 +3692,9 @@ int ocfs2_add_refcount_flag(struct inode *inode,
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);		struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	struct ocfs2_alloc_context *meta_ac = NULL;		struct ocfs2_alloc_context *meta_ac = NULL;

			/* We need to be able to handle at least an extent tree split. */
			ref_blocks = ocfs2_extend_meta_needed(data_et->et_root_el);

	ret = ocfs2_calc_refcount_meta_credits(inode->i_sb,		ret = ocfs2_calc_refcount_meta_credits(inode->i_sb,
	ref_ci, ref_root_bh,		ref_ci, ref_root_bh,
	p_cluster, num_clusters,		p_cluster, num_clusters,

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