Re: [PATCH 11/11] storage: Validate the device formats at logical startup

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On Thu, Dec 15, 2016 at 04:42:16PM -0500, John Ferlan wrote:
At startup time, rather than blindly trusting the target devices are
still properly formatted, let's check to make sure the pool's target
devices are all properly formatted before attempting to start the pool.

Signed-off-by: John Ferlan <jferlan@xxxxxxxxxx>
---
src/storage/storage_backend_logical.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/src/storage/storage_backend_logical.c b/src/storage/storage_backend_logical.c
index f128941..a433e61 100644
--- a/src/storage/storage_backend_logical.c
+++ b/src/storage/storage_backend_logical.c
@@ -743,6 +743,19 @@ static int
virStorageBackendLogicalStartPool(virConnectPtr conn ATTRIBUTE_UNUSED,
                                  virStoragePoolObjPtr pool)
{
+    size_t i;
+
+    /* Let's make sure the pool's devices are properly formatted */
+    for (i = 0; i < pool->def->source.ndevice; i++) {
+        const char *path = pool->def->source.devices[i].path;
+
+        /* The blkid FS and Part probing code doesn't know "lvm2" (this
+         * pool's only format type), but it does know "LVM2_member", so
+         * we'll pass that here */
+        if (!virStorageBackendDeviceProbeEmpty(path, "LVM2_member", false))
+            return -1;
+    }

This seems pointless.

Is there any chance where this check would fail but the (arguably
also pointless) virStorageBackendLogicalMatchPoolSource
check below would succeed?

Jan

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