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device: if BLKPBSZGET is unavailable, enforce 512

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If there is no define for BLKPBSZGET - we have hard time how to
decrypt physical block size - we can't use here block_size,
since this is usually 4k while we need to use 512b.

FIXME: find some better way, until that enforce value 512.
Eventually we could also try to put in:

+#ifndef BLKPBSZGET
+# define BLKPBSZGET _IO(0x12,123)
+#endif

but this will still not work well on old kernels.
This commit is contained in:
Zdenek Kabelac 2013-12-18 10:52:09 +01:00
parent 434d95cef3
commit 3c818c8946
1 changed files with 2 additions and 1 deletions
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3
lib/device/dev-io.c
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@ -157,7 +157,8 @@ int dev_get_block_size(struct device *dev, unsigned int *physical_block_size, un
} }
#else #else
/* if we can't get physical block size, just use logical block size instead */ /* if we can't get physical block size, just use logical block size instead */
dev->phys_block_size = dev->block_size; // FIXME block_size is typically 4096b while phys_block_size is 512b
dev->phys_block_size = 512;// dev->block_size;
log_debug_devs("%s: physical block size can't be determined, using logical " log_debug_devs("%s: physical block size can't be determined, using logical "
"block size of %u bytes instead", name, dev->phys_block_size); "block size of %u bytes instead", name, dev->phys_block_size);
#endif #endif