Commit 07ccb7bf authored Feb 12, 2010 by Steven Whitehouse

GFS2: Fix bmap allocation corner-case bug



This patch solves a corner case during allocation which occurs if both
metadata (indirect) and data blocks are required but there is an
obstacle in the filesystem (e.g. a resource group header or another
allocated block) such that when the allocation is requested only
enough blocks for the metadata are returned.

By changing the exit condition of this loop, we ensure that a
minimum of one data block will always be returned.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

parent 0e5a9fb0

fs/gfs2/bmap.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -541,7 +541,7 @@ static int gfs2_bmap_alloc(struct inode *inode, const sector_t lblock,
		*ptr++ = cpu_to_be64(bn++);
		break;
		}
		} while (state != ALLOC_DATA);
		} while ((state != ALLOC_DATA) \|\| !dblock);

		ip->i_height = height;
		gfs2_add_inode_blocks(&ip->i_inode, alloced);

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