8:35 a.m.
The backingStore field was a virStorageSourcePtr.
Because a quorum can contain more that one backingStore at the same level,
it's now an array of 'virStorageSourcePtr'.
This patch rename src->backingStore to src->backingStores,
Made the necessary changes to virStorageSourceSetBackingStore
and virStorageSourceGetBackingStore.
virStorageSourceSetBackingStore can now expand the size of src->backingStores.
Signed-off-by: Matthias Gatto <matthias.gatto(a)outscale.com>
---
src/storage/storage_backend.c | 2 +-
src/storage/storage_backend_fs.c | 2 +-
src/util/virstoragefile.c | 66 +++++++++++++++++++++++++++++++---------
src/util/virstoragefile.h | 3 +-
4 files changed, 56 insertions(+), 17 deletions(-)
diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c
index 08ed1dd..d71bb1a 100644
--- a/src/storage/storage_backend.c
+++ b/src/storage/storage_backend.c
@@ -498,7 +498,7 @@ virStorageBackendCreateRaw(virConnectPtr conn ATTRIBUTE_UNUSED,
goto cleanup;
}
- if (vol->target.backingStore) {
+ if (vol->target.backingStores) {
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("backing storage not supported for raw volumes"));
goto cleanup;
diff --git a/src/storage/storage_backend_fs.c b/src/storage/storage_backend_fs.c
index b216e91..68419e3 100644
--- a/src/storage/storage_backend_fs.c
+++ b/src/storage/storage_backend_fs.c
@@ -1100,7 +1100,7 @@ static int createFileDir(virConnectPtr conn ATTRIBUTE_UNUSED,
return -1;
}
- if (vol->target.backingStore) {
+ if (vol->target.backingStores) {
virReportError(VIR_ERR_NO_SUPPORT, "%s",
_("backing storage not supported for directories
volumes"));
return -1;
diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index 1299f98..8c05786 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -1809,22 +1809,50 @@ 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)
{
- if (!src)
+ if (!src || !src->backingStores || pos >= src->nBackingStores)
return NULL;
- return src->backingStore;
+ return src->backingStores[pos];
}
+/**
+ * virStorageSourceSetBackingStore:
+ * @src: virStorageSourcePtr to hold @backingStore
+ * @backingStore: backingStore to store
+ * @pos: position of the backing store to store
+ *
+ * Set @backingStore at @pos in src->backingStores.
+ * If src->backingStores don't have the space to contain
+ * @backingStore, we expand src->backingStores.
+ * If src->backingStores[pos] is alerady set, free it.
+ */
int
virStorageSourceSetBackingStore(virStorageSourcePtr src,
virStorageSourcePtr backingStore,
- size_t pos ATTRIBUTE_UNUSED)
+ size_t pos)
{
- src->backingStore = backingStore;
+ if (!src)
+ return -1;
+
+ if (pos >= src->nBackingStores) {
+ int nbr = pos - src->nBackingStores + 1;
+ if (VIR_EXPAND_N(src->backingStores, src->nBackingStores, nbr) < 0)
+ return -1;
+ }
+
+ if (src->backingStores[pos])
+ virStorageSourceFree(src->backingStores[pos]);
+ src->backingStores[pos] = backingStore;
return 0;
}
@@ -1843,6 +1871,7 @@ virStorageSourceCopy(const virStorageSource *src,
bool backingChain)
{
virStorageSourcePtr ret = NULL;
+ size_t i;
if (VIR_ALLOC(ret) < 0)
return NULL;
@@ -1855,6 +1884,8 @@ virStorageSourceCopy(const virStorageSource *src,
ret->physical = src->physical;
ret->readonly = src->readonly;
ret->shared = src->shared;
+ ret->nBackingStores = src->nBackingStores;
+ ret->threshold = src->threshold;
/* storage driver metadata are not copied */
ret->drv = NULL;
@@ -1903,12 +1934,14 @@ virStorageSourceCopy(const virStorageSource *src,
!(ret->auth = virStorageAuthDefCopy(src->auth)))
goto error;
- if (backingChain && virStorageSourceGetBackingStore(src, 0)) {
- if (virStorageSourceSetBackingStore(ret,
-
virStorageSourceCopy(virStorageSourceGetBackingStore(src, 0),
- true),
- 0) < 0)
- goto error;
+ for (i = 0; i < src->nBackingStores; ++i) {
+ if (backingChain && virStorageSourceGetBackingStore(src, i)) {
+ if (virStorageSourceSetBackingStore(ret,
+
virStorageSourceCopy(virStorageSourceGetBackingStore(src, i),
+ true),
+ 0) < 0)
+ goto error;
+ }
}
return ret;
@@ -2040,6 +2073,8 @@ virStorageSourceIsEmpty(virStorageSourcePtr src)
void
virStorageSourceBackingStoreClear(virStorageSourcePtr def)
{
+ size_t i;
+
if (!def)
return;
@@ -2047,8 +2082,11 @@ virStorageSourceBackingStoreClear(virStorageSourcePtr def)
VIR_FREE(def->backingStoreRaw);
/* recursively free backing chain */
- virStorageSourceFree(virStorageSourceGetBackingStore(def, 0));
- ignore_value(virStorageSourceSetBackingStore(def, NULL, 0));
+ for (i = 0; i < def->nBackingStores; ++i)
+ virStorageSourceFree(virStorageSourceGetBackingStore(def, i));
+ if (def->nBackingStores > 0)
+ VIR_FREE(def->backingStores);
+ def->nBackingStores = 0;
}
diff --git a/src/util/virstoragefile.h b/src/util/virstoragefile.h
index ce1cb5d..290c20f 100644
--- a/src/util/virstoragefile.h
+++ b/src/util/virstoragefile.h
@@ -270,7 +270,8 @@ struct _virStorageSource {
bool shared;
/* backing chain of the storage source */
- virStorageSourcePtr backingStore;
+ virStorageSourcePtr *backingStores;
+ size_t nBackingStores;
/* metadata for storage driver access to remote and local volumes */
virStorageDriverDataPtr drv;
--
2.6.2