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authorSteven Whitehouse <swhiteho@redhat.com>2010-02-12 10:10:55 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2011-03-02 09:46:44 -0500
commit2d3a5662ff2d47e1d68a84f84bb78311d993f1d9 (patch)
treecd35ceb81155c593ee141a86a9c6bc9cd6ade058 /fs
parent6934e92473f477a70ce50d83105a5ae346d1fb2c (diff)
GFS2: Fix bmap allocation corner-case bug
commit 07ccb7bf2c928fef4fea2cda69ba2e23479578db upstream. 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> Cc: maximilian attems <max@stro.at> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs')
-rw-r--r--fs/gfs2/bmap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 6d47379e794b..583e823307ae 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -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);