[libvirt] [PATCH 11/14] qemu_domain: Introduce qemuDomainGetPRUsageCount
For hotplug, we will need to know how many disks use given
pr-manager so that we know if to plug it too (for the first
usage) or unlpug it (for the last one).
Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com>
---
src/qemu/qemu_domain.c | 26 ++++++++++++++++++++++++++
src/qemu/qemu_domain.h | 4 ++++
2 files changed, 30 insertions(+)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 4079165f9..c327dfc86 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -11236,6 +11236,32 @@ qemuDomainDiskPRObjectKillAll(qemuDomainObjPrivatePtr priv)
priv->prHelpers = NULL;
}
+size_t
+qemuDomainGetPRUsageCount(const virDomainDef *def,
+ const char *prAlias)
+{
+ size_t used = 0;
+ size_t i;
+
+ for (i = 0; i < def->ndisks; i++) {
+ const virDomainDiskDef *disk = def->disks[i];
+ qemuDomainStorageSourcePrivatePtr srcPriv;
+
+ if (!disk->src ||
+ !disk->src->pr)
+ continue;
+
+ srcPriv = QEMU_DOMAIN_STORAGE_SOURCE_PRIVATE(disk->src);
+
+ if (STRNEQ(srcPriv->prAlias, prAlias))
+ continue;
+
+ used++;
+ }
+
+ return used;
+}
+
static int
qemuDomainPrepareDiskPR(qemuDomainObjPrivatePtr priv,
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index 5fdb5b931..231583256 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -1011,4 +1011,8 @@ qemuDomainDiskPRObjectRegister(qemuDomainObjPrivatePtr priv,
void
qemuDomainDiskPRObjectKillAll(qemuDomainObjPrivatePtr priv);
+size_t
+qemuDomainGetPRUsageCount(const virDomainDef *def,
+ const char *prAlias);
+
#endif /* __QEMU_DOMAIN_H__ */
--
2.13.6