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storage: don't probe non-files

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Backing chains can end on a network protocol, such as nbd:xxx; we
should not attempt to probe the file system in this case.

* src/storage/storage_backend_fs.c (virStorageBackendProbeTarget):
Only probe files.
This commit is contained in:
Eric Blake 2012-10-09 17:50:14 -06:00
parent 1246640b3d
commit eac74c1f47
1 changed files with 2 additions and 1 deletions
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3
src/storage/storage_backend_fs.c
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@ -108,7 +108,8 @@ virStorageBackendProbeTarget(virStorageVolTargetPtr target,
if (meta->backingStore) {
*backingStore = meta->backingStore;
meta->backingStore = NULL;
if (meta->backingStoreFormat == VIR_STORAGE_FILE_AUTO) {
if (meta->backingStoreFormat == VIR_STORAGE_FILE_AUTO &&
meta->backingStoreIsFile) {
if ((ret = virStorageFileProbeFormat(*backingStore)) < 0) {
/* If the backing file is currently unavailable, only log an error,
* but continue. Returning -1 here would disable the whole storage