[Cluster-devel] [GFS2 PATCH] GFS2: Get a block reservation before resizing a file
Steven Whitehouse
swhiteho at redhat.com
Fri Feb 1 21:13:28 UTC 2013
Hi,
Now in the -nmw tree. Thanks,
Steve.
On Fri, 2013-02-01 at 12:03 -0500, Bob Peterson wrote:
> 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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