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Go Back   Linux Archive > Redhat > Device-mapper Development

 
 
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Old 10-21-2011, 10:19 AM
Joe Thornber
 
Default in thin_iterate_devices(), get the pool dev size a non-blocking way.

---
drivers/md/dm-thin.c | 10 +++++++---
1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index cd48cd8..1976a30 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2359,10 +2359,14 @@ static int thin_iterate_devices(struct dm_target *ti,
dm_block_t blocks;
struct thin_c *tc = ti->private;

- r = dm_pool_get_data_dev_size(tc->pool->pmd, &blocks);
- if (r)
- return r;
+ /*
+ * We can't call dm_pool_get_data_dev_size() since that blocks. So
+ * we follow a more convoluted path through to the pool's target.
+ */
+ if (!tc->pool->ti)
+ return 0; /* nothing is bound */

+ blocks = tc->pool->ti->len >> tc->pool->block_shift;
if (blocks)
return fn(ti, tc->pool_dev, 0, tc->pool->sectors_per_block * blocks, data);

--
1.7.5.4

--
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