[libvirt] [PATCH 6/6] block_resize: Expose the new API in virsh

[Osier Yang]

Add new command "block_resize":
  * Units for option "size" is KB.
  * "--device" is used to specify the device name. E.g. vda, vdb.
---
 tools/virsh.c   |   61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 tools/virsh.pod |    8 +++++++
 2 files changed, 68 insertions(+), 1 deletions(-)

diff --git a/tools/virsh.c b/tools/virsh.c
index 49034ae..fcd1be6 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -5269,6 +5269,64 @@ cmdBlockPull(vshControl *ctl, const vshCmd *cmd)
 }
 
 /*
+ * "blockresize" command
+ */
+static const vshCmdInfo info_block_resize[] = {
+    {"help", N_("Resize block device of domain.")},
+    {"desc", N_("Resize block device of domain.")},
+    {NULL, NULL}
+};
+
+static const vshCmdOptDef opts_block_resize[] = {
+    {"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
+    {"device", VSH_OT_DATA, VSH_OFLAG_REQ, N_("device name of the block device")},
+    {"size", VSH_OT_INT, VSH_OFLAG_REQ, N_("New size of the block device in kilobytes, "
+                                           "the size must be integer")},
+    {NULL, 0, 0, NULL}
+};
+
+static bool
+cmdBlockResize(vshControl *ctl, const vshCmd *cmd)
+{
+    virDomainPtr dom;
+    const char *device = NULL;
+    unsigned long long size = 0;
+    unsigned int flags = 0;
+    int ret = false;
+
+    if (!vshConnectionUsability(ctl, ctl->conn))
+        return false;
+
+    if (vshCommandOptString(cmd, "device", (const char **) &device) < 0) {
+        vshError(ctl, "%s", _("Device must not be empty"));
+        return false;
+    }
+
+    if (vshCommandOptULongLong(cmd, "size", &size) < 0) {
+        vshError(ctl, "%s", _("Unable to parse integer"));
+        return false;
+    }
+
+    if (size > ULLONG_MAX / 1024) {
+        vshError(ctl, _("Size must be less than %llu"), ULLONG_MAX / 1024);
+        return false;
+    }
+
+    if (!(dom = vshCommandOptDomain(ctl, cmd, NULL)))
+        return false;
+
+    if (virDomainBlockResize(dom, device, size, flags) < 0) {
+        vshError(ctl, _("Failed to resize block device '%s'"), device);
+    } else {
+        vshPrint(ctl, _("Block device '%s' is resized"), device);
+        ret = true;
+    }
+
+    virDomainFree(dom);
+    return ret;
+}
+
+/*
  * "blockjobinfo" command
  */
 static const vshCmdInfo info_block_job[] = {
@@ -12537,8 +12595,9 @@ static const vshCmdDef domManagementCmds[] = {
      info_attach_interface, 0},
     {"autostart", cmdAutostart, opts_autostart, info_autostart, 0},
     {"blkiotune", cmdBlkiotune, opts_blkiotune, info_blkiotune, 0},
-    {"blockpull", cmdBlockPull, opts_block_pull, info_block_pull, 0},
     {"blockjob", cmdBlockJob, opts_block_job, info_block_job, 0},
+    {"blockpull", cmdBlockPull, opts_block_pull, info_block_pull, 0},
+    {"blockresize", cmdBlockResize, opts_block_resize, info_block_resize, 0},
 #ifndef WIN32
     {"console", cmdConsole, opts_console, info_console, 0},
 #endif
diff --git a/tools/virsh.pod b/tools/virsh.pod
index 2cd0f73..fb41063 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -419,6 +419,14 @@ the B<shutdown> command instead.  However, this does not delete any
 storage volumes used by the guest, and if the domain is persistent, it
 can be restarted later.
 
+=item B<blockresize> I<domain> I<--path> I<--size>
+
+Resize a block device of domain while the domain is running, I<--path>
+specifies the absolute path of the block device, I<--size> specifies the
+new size in kilobytes
+
+The I<--managed-save> flag guarantees that any managed save image(see
+
 =item B<domblkstat> I<domain> I<block-device>
 
 Get device block stats for a running domain.
-- 
1.7.6