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GFS2: Fix bmap allocation corner-case bug

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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>
This commit is contained in:
Steven Whitehouse 2010-02-12 10:10:55 +00:00
parent 0e5a9fb042
commit 07ccb7bf2c
1 changed files with 1 additions and 1 deletions
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2
fs/gfs2/bmap.c
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@ -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);