2:27 a.m.
The new API is named as "virDomainBlockResize", intending to add
support for qemu monitor command "block_resize" (both HMP and QMP).
Similar with APIs like "virDomainSetMemoryFlags", the units for
argument "size" is kilobytes.
---
include/libvirt/libvirt.h.in | 5 ++-
src/driver.h | 8 ++++-
src/libvirt.c | 68 ++++++++++++++++++++++++++++++++++++++++++
src/libvirt_public.syms | 1 +
4 files changed, 80 insertions(+), 2 deletions(-)
diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index 0787f18..0ec4959 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -1384,7 +1384,10 @@ int virDomainBlockPeek (virDomainPtr dom,
size_t size,
void *buffer,
unsigned int flags);
-
+int virDomainBlockResize (virDomainPtr dom,
+ const char *disk,
+ unsigned long long size,
+ unsigned int flags);
/** virDomainBlockInfo:
*
diff --git a/src/driver.h b/src/driver.h
index 9e78257..015afc5 100644
--- a/src/driver.h
+++ b/src/driver.h
@@ -377,7 +377,12 @@ typedef int
unsigned long long offset, size_t size,
void *buffer,
unsigned int flags);
-
+typedef int
+ (*virDrvDomainBlockResize)
+ (virDomainPtr domain,
+ const char *disk,
+ unsigned long long size,
+ unsigned int flags);
typedef int
(*virDrvDomainMemoryPeek)
(virDomainPtr domain,
@@ -841,6 +846,7 @@ struct _virDriver {
virDrvDomainMigratePrepare domainMigratePrepare;
virDrvDomainMigratePerform domainMigratePerform;
virDrvDomainMigrateFinish domainMigrateFinish;
+ virDrvDomainBlockResize domainBlockResize;
virDrvDomainBlockStats domainBlockStats;
virDrvDomainBlockStatsFlags domainBlockStatsFlags;
virDrvDomainInterfaceStats domainInterfaceStats;
diff --git a/src/libvirt.c b/src/libvirt.c
index b428fe6..7efa4a3 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -7028,6 +7028,74 @@ error:
}
/**
+ * virDomainBlockResize:
+ * @dom: pointer to the domain object
+ * @disk: path to the block image, or shorthand
+ * @size: new size of the block image in kilobytes
+ * @flags: unused, always pass 0
+ *
+ * Note that this call may fail if the underlying virtualization hypervisor
+ * does not support it. And this call requires privileged access to the
+ * hypervisor.
+ *
+ * The @disk parameter is either an unambiguous source name of the
+ * block device (the <source file='...'/> sub-element, such as
+ * "/path/to/image"), or (since 0.9.5) the device target shorthand
+ * (the <target dev='...'/> sub-element, such as "xvda"). Valid
names
+ * can be found by calling virDomainGetXMLDesc() and inspecting
+ * elements within //domain/devices/disk.
+ *
+ * Resize a block device of domain while the domain is running.
+ *
+ * Returns: 0 in case of success or -1 in case of failure.
+ */
+
+int
+virDomainBlockResize (virDomainPtr dom,
+ const char *disk,
+ unsigned long long size,
+ unsigned int flags)
+{
+ virConnectPtr conn;
+
+ VIR_DOMAIN_DEBUG(dom, "disk=%s, size=%llu, flags=%x", disk, size, flags);
+
+ virResetLastError();
+
+ if (!VIR_IS_CONNECTED_DOMAIN (dom)) {
+ virLibDomainError(VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
+ virDispatchError(NULL);
+ return -1;
+ }
+ conn = dom->conn;
+
+ if (dom->conn->flags & VIR_CONNECT_RO) {
+ virLibDomainError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+ goto error;
+ }
+
+ if (!disk) {
+ virLibDomainError(VIR_ERR_INVALID_ARG,
+ _("disk is NULL"));
+ goto error;
+ }
+
+ if (conn->driver->domainBlockResize) {
+ int ret;
+ ret =conn->driver->domainBlockResize(dom, disk, size, flags);
+ if (ret < 0)
+ goto error;
+ return ret;
+ }
+
+ virLibDomainError(VIR_ERR_NO_SUPPORT, __FUNCTION__);
+
+error:
+ virDispatchError(dom->conn);
+ return -1;
+}
+
+/**
* virDomainMemoryPeek:
* @dom: pointer to the domain object
* @start: start of memory to peek
diff --git a/src/libvirt_public.syms b/src/libvirt_public.syms
index 6ba1526..e78f353 100644
--- a/src/libvirt_public.syms
+++ b/src/libvirt_public.syms
@@ -502,6 +502,7 @@ LIBVIRT_0.9.8 {
global:
virConnectIsAlive;
virConnectSetKeepAlive;
+ virDomainBlockResize;
} LIBVIRT_0.9.7;
# .... define new API here using predicted next version number ....
--
1.7.7.3