As explain in the former patchs, backingStore can be treat an array or
a pointer.
If we have only one backingStore we have to use it as a normal ptr
but if there is more backing store, we use it as a pointer's array.
Because it would be complicated to expend backingStore manually, and do
the convertion from a pointer to an array, I've created the
virStorageSourcePushBackingStore function to help.
This function allocate an array of pointer only if there is more than 1 bs.
Because we can not remove a child from a quorum, i didn't create the function
virStorageSourcePopBackingStore.
I've changed virStorageSourceBackingStoreClear, virStorageSourceSetBackingStore
and virStorageSourceGetBackingStore to handle the case where backingStore
is an array.
Signed-off-by: Matthias Gatto matthias.ga...@outscale.com
---
src/conf/storage_conf.c | 3 +-
src/libvirt_private.syms | 1 +
src/storage/storage_backend_fs.c | 2 +-
src/storage/storage_backend_logical.c | 2 +-
src/util/virstoragefile.c | 87 ---
src/util/virstoragefile.h | 2 +
6 files changed, 87 insertions(+), 10 deletions(-)
diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c
index a8a90b4..fc51d47 100644
--- a/src/conf/storage_conf.c
+++ b/src/conf/storage_conf.c
@@ -1340,8 +1340,9 @@ virStorageVolDefParseXML(virStoragePoolDefPtr pool,
}
if ((backingStore = virXPathString(string(./backingStore/path), ctxt))) {
-if (VIR_ALLOC(ret-target.backingStore) 0)
+if (VIR_ALLOC_N(ret-target.backingStore, 1) 0)
goto error;
+ret-target.nBackingStores = 1;
ret-target.backingStore-path = backingStore;
backingStore = NULL;
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index dd83518..71e8625 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2002,6 +2002,7 @@ virStorageSourceParseRBDColonString;
virStorageSourcePoolDefFree;
virStorageSourcePoolModeTypeFromString;
virStorageSourcePoolModeTypeToString;
+virStorageSourcePushBackingStore;
virStorageSourceSetBackingStore;
virStorageTypeFromString;
virStorageTypeToString;
diff --git a/src/storage/storage_backend_fs.c b/src/storage/storage_backend_fs.c
index 07fd6ee..979abd3 100644
--- a/src/storage/storage_backend_fs.c
+++ b/src/storage/storage_backend_fs.c
@@ -107,7 +107,7 @@ virStorageBackendProbeTarget(virStorageSourcePtr target,
if
(!virStorageSourceIsLocalStorage(virStorageSourceGetBackingStore(target, 0))) {
virStorageSourceFree(virStorageSourceGetBackingStore(target, 0));
-if (VIR_ALLOC(target-backingStore) 0)
+if (virStorageSourcePushBackingStore(target) == false)
goto cleanup;
target-backingStore-type = VIR_STORAGE_TYPE_NETWORK;
diff --git a/src/storage/storage_backend_logical.c
b/src/storage/storage_backend_logical.c
index 300c990..edec124 100644
--- a/src/storage/storage_backend_logical.c
+++ b/src/storage/storage_backend_logical.c
@@ -148,7 +148,7 @@ virStorageBackendLogicalMakeVol(char **const groups,
* lv is created with --virtualsize).
*/
if (groups[1] !STREQ(groups[1], ) (groups[1][0] != '[')) {
-if (VIR_ALLOC(vol-target.backingStore) 0)
+if (virStorageSourcePushBackingStore(vol-target) == false)
goto cleanup;
if (virAsprintf(vol-target.backingStore-path, %s/%s,
diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index 20f45f3..4217a80 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -1814,21 +1814,86 @@ virStorageSourcePoolDefCopy(const
virStorageSourcePoolDef *src)
}
+/**
+ * virStorageSourceGetBackingStore:
+ * @src: virStorageSourcePtr containing the backing stores
+ * @pos: position of the backing store to get
+ *
+ * return the backingStore at the position of @pos
+ */
virStorageSourcePtr
-virStorageSourceGetBackingStore(const virStorageSource *src,
-size_t pos ATTRIBUTE_UNUSED)
+virStorageSourceGetBackingStore(const virStorageSource *src, size_t pos)
{
-return src-backingStore;
+if (!src-backingStore || (pos 1 pos = src-nBackingStores))
+return NULL;
+if (src-nBackingStores 2)
+return src-backingStore;
+return ((virStorageSourcePtr *)src-backingStore)[pos];
}
+/**
+ * virStorageSourcePushBackingStore:
+ * @src: virStorageSourcePtr to allocate the new backing store
+ *
+ * Allocate size for a new backing store in src-backingStore
+ * and update src-nBackingStores
+ * If we have less than 2 backing stores, we treat src-backingStore
+ * as a pointer otherwise we treat it as an array of virStorageSourcePtr
+ */
+bool
+virStorageSourcePushBackingStore(virStorageSourcePtr src)
+{
+virStorageSourcePtr tmp;
+virStorageSourcePtr *tmp2;
+
+if (src-nBackingStores == 1) {
+/* If we need more than one backing store we
