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[dm-devel] [PATCH] fix bug on invalid chunksize




On Fri, 2 Oct 2009, Alasdair G Kergon wrote:

> On Wed, Sep 30, 2009 at 10:41:10AM -0400, Mike Snitzer wrote:
> > Maximum chunk size is 512kB, 
> 
> Can you confirm that a supplied chunk size of 4294971392, for example, still
> gets rejected?

It gets rejected but there's a bug that device is left open after a 
failure. See this patch:

Properly close the device if failing because of an invalid chunk size.

Signed-off-by: Mikulas Patocka <mpatocka redhat com>

---
 drivers/md/dm-exception-store.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.31-fast-new/drivers/md/dm-exception-store.c
===================================================================
--- linux-2.6.31-fast-new.orig/drivers/md/dm-exception-store.c	2009-10-07 00:05:28.000000000 +0200
+++ linux-2.6.31-fast-new/drivers/md/dm-exception-store.c	2009-10-07 00:05:35.000000000 +0200
@@ -237,7 +237,7 @@ int dm_exception_store_create(struct dm_
 
 	r = set_chunk_size(tmp_store, argv[2], &ti->error);
 	if (r)
-		goto bad_cow;
+		goto bad_ctr;
 
 	r = type->ctr(tmp_store, 0, NULL);
 	if (r) {


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