[Cluster-devel] [GFS2 PATCH] GFS2: Get a block reservation before resizing a file
Bob Peterson
rpeterso at redhat.com
Fri Feb 1 17:03:02 UTC 2013
Hi,
This patch allocates a block reservation structure before growing
or shrinking a file. Without this structure, the grow or shink code
can reference the bad pointer.
Regards,
Bob Peterson
Red Hat File Systems
Signed-off-by: Bob Peterson <rpeterso at redhat.com>
---
fs/gfs2/bmap.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index d29d779..df686d1 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1288,6 +1288,10 @@ int gfs2_setattr_size(struct inode *inode, u64 newsize)
inode_dio_wait(inode);
+ ret = gfs2_rs_alloc(GFS2_I(inode));
+ if (ret)
+ return ret;
+
oldsize = inode->i_size;
if (newsize >= oldsize)
return do_grow(inode, newsize);
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