Re: [libvirt] [PATCH v2 5/9] virstoragefile: Treat backingStore as a pointer or an array
On 21.01.2015 16:29, Matthias Gatto wrote:
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 | 7 ++-
src/libvirt_private.syms | 1 +
src/storage/storage_backend_fs.c | 2 +
src/storage/storage_backend_logical.c | 2 +-
src/util/virstoragefile.c | 89
---
src/util/virstoragefile.h | 2 +
6 files changed, 94 insertions(+), 9 deletions(-)
diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c
index fac85fa..41887eb 100644
--- a/src/conf/storage_conf.c
+++ b/src/conf/storage_conf.c
@@ -1343,7 +1343,12 @@ virStorageVolDefParseXML(virStoragePoolDefPtr pool,
if (VIR_ALLOC(backingStorePtr) 0)
goto error;
-backingStorePtr = virStorageSourceSetBackingStore(ret-target,
backingStorePtr, 0);
+if (!virStorageSourcePushBackingStore(ret-target))
+goto error;
+
+backingStorePtr = virStorageSourceSetBackingStore(ret-target,
+ backingStorePtr,
+
ret-target.nBackingStores - 1);
backingStorePtr-path = backingStore;
backingStore = NULL;
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 980235b..5752907 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2033,6 +2033,7 @@ 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 a3b6688..0d8c5ad 100644
--- a/src/storage/storage_backend_fs.c
+++ b/src/storage/storage_backend_fs.c
@@ -112,6 +112,8 @@ virStorageBackendProbeTarget(virStorageSourcePtr target,
if (VIR_ALLOC(backingStore) 0)
goto cleanup;
+if (virStorageSourcePushBackingStore(target) == false)
+goto cleanup;
virStorageSourceSetBackingStore(target, backingStore, 0);
backingStore-type = VIR_STORAGE_TYPE_NETWORK;
backingStore-path = meta-backingStoreRaw;
diff --git a/src/storage/storage_backend_logical.c
b/src/storage/storage_backend_logical.c
index fcec31f..cd8de85 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(virStorageSourceGetBackingStore(vol-target,
0)-path, %s/%s,
diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index ba38827..554aa8b 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -1798,21 +1798,88 @@ 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-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 backingStorePtr in src-backingStore
+ * and update src-nBackingStores
+ * If we
Re: [libvirt] [PATCH v2 5/9] virstoragefile: Treat backingStore as a pointer or an array
On Wed, Jan 28, 2015 at 11:10 AM, Michal Privoznik mpriv...@redhat.com wrote:
On 21.01.2015 16:29, Matthias Gatto wrote:
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 | 7 ++-
src/libvirt_private.syms | 1 +
src/storage/storage_backend_fs.c | 2 +
src/storage/storage_backend_logical.c | 2 +-
src/util/virstoragefile.c | 89
---
src/util/virstoragefile.h | 2 +
6 files changed, 94 insertions(+), 9 deletions(-)
diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c
index fac85fa..41887eb 100644
--- a/src/conf/storage_conf.c
+++ b/src/conf/storage_conf.c
@@ -1343,7 +1343,12 @@ virStorageVolDefParseXML(virStoragePoolDefPtr pool,
if (VIR_ALLOC(backingStorePtr) 0)
goto error;
-backingStorePtr = virStorageSourceSetBackingStore(ret-target,
backingStorePtr, 0);
+if (!virStorageSourcePushBackingStore(ret-target))
+goto error;
+
+backingStorePtr = virStorageSourceSetBackingStore(ret-target,
+ backingStorePtr,
+
ret-target.nBackingStores - 1);
backingStorePtr-path = backingStore;
backingStore = NULL;
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 980235b..5752907 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2033,6 +2033,7 @@ 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 a3b6688..0d8c5ad 100644
--- a/src/storage/storage_backend_fs.c
+++ b/src/storage/storage_backend_fs.c
@@ -112,6 +112,8 @@ virStorageBackendProbeTarget(virStorageSourcePtr target,
if (VIR_ALLOC(backingStore) 0)
goto cleanup;
+if (virStorageSourcePushBackingStore(target) == false)
+goto cleanup;
virStorageSourceSetBackingStore(target, backingStore, 0);
backingStore-type = VIR_STORAGE_TYPE_NETWORK;
backingStore-path = meta-backingStoreRaw;
diff --git a/src/storage/storage_backend_logical.c
b/src/storage/storage_backend_logical.c
index fcec31f..cd8de85 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(virStorageSourceGetBackingStore(vol-target,
0)-path, %s/%s,
diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index ba38827..554aa8b 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -1798,21 +1798,88 @@ 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-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 backingStorePtr in
