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[Libvir] [PATCH] Device attach/detach on virsh(XML version)



Hi

This patch adds virsh attach-device/detach-device.
Currently it supports a definition of a device by XML(proposal 2).
I plan to submit command option version (proposal 1) later.

Any comments are welcome!

Signed-off-by: Masayuki Sunou <fj1826dm aa jp fujitsu com>

Thanks,
Masayuki Sunou.

--------------------------------------------------------------------------------
Index: src/virsh.c
===================================================================
RCS file: /data/cvs/libvirt/src/virsh.c,v
retrieving revision 1.75
diff -u -p -r1.75 virsh.c
--- src/virsh.c	3 May 2007 16:03:02 -0000	1.75
+++ src/virsh.c	16 May 2007 00:56:21 -0000
@@ -2403,6 +2403,139 @@ cmdVNCDisplay(vshControl * ctl, vshCmd *
     return ret;
 }
 
+/*
+ * "attach-device" command
+ */
+static vshCmdInfo info_attach_device[] = {
+    {"syntax", "attach-device <domain> <file> "},
+    {"help", gettext_noop("attach device from an XML file")},
+    {"desc", gettext_noop("Attach device from an XML <file>.")},
+    {NULL, NULL}
+};
+
+static vshCmdOptDef opts_attach_device[] = {
+    {"domain",  VSH_OT_DATA, VSH_OFLAG_REQ, gettext_noop("domain name, id or uuid")},
+    {"file", VSH_OT_DATA, 0, gettext_noop("XML file")},
+    {NULL, 0, 0, NULL}
+};
+
+static int
+cmdAttachDevice(vshControl * ctl, vshCmd * cmd)
+{
+    virDomainPtr dom;
+    char *from;
+    char buffer[BUFSIZ];
+    int ret = TRUE;
+    int found;
+    int fd, l;
+
+    if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
+        return FALSE;
+
+    if (!(dom = vshCommandOptDomain(ctl, cmd, "domain", NULL)))
+        return FALSE;
+
+    from = vshCommandOptString(cmd, "file", &found);
+    if (!found) {
+        virDomainFree(dom);
+        return FALSE;
+    }
+
+    fd = open(from, O_RDONLY);
+    if (fd < 0) {
+        vshError(ctl, FALSE, _("Failed to read description file %s"), from);
+        virDomainFree(dom);
+        return FALSE;
+    }
+    l = read(fd, &buffer[0], sizeof(buffer));
+    if ((l <= 0) || (l >= (int) sizeof(buffer))) {
+        vshError(ctl, FALSE, _("Failed to read description file %s"), from);
+        close(fd);
+        virDomainFree(dom);
+        return FALSE;
+    }
+    buffer[l] = 0;
+
+    ret = virDomainAttachDevice(dom, &buffer[0]);
+    if (ret < 0) {
+        vshError(ctl, FALSE, _("Failed to attach device from %s"), from);
+        close(fd);
+        virDomainFree(dom);
+        return FALSE;
+    }
+
+    close(fd);
+    virDomainFree(dom);
+    return TRUE;
+}
+
+
+/*
+ * "detach-device" command
+ */
+static vshCmdInfo info_detach_device[] = {
+    {"syntax", "detach-device <domain> <file> "},
+    {"help", gettext_noop("detach device from an XML file")},
+    {"desc", gettext_noop("Detach device from an XML <file>")},
+    {NULL, NULL}
+};
+
+static vshCmdOptDef opts_detach_device[] = {
+    {"domain",  VSH_OT_DATA, VSH_OFLAG_REQ, gettext_noop("domain name, id or uuid")},
+    {"file", VSH_OT_DATA, 0, gettext_noop("XML file")},
+    {NULL, 0, 0, NULL}
+};
+
+static int
+cmdDetachDevice(vshControl * ctl, vshCmd * cmd)
+{
+    virDomainPtr dom;
+    char *from;
+    char buffer[BUFSIZ];
+    int ret = TRUE;
+    int found;
+    int fd, l;
+
+    if (!vshConnectionUsability(ctl, ctl->conn, TRUE))
+        return FALSE;
+
+    if (!(dom = vshCommandOptDomain(ctl, cmd, "domain", NULL)))
+        return FALSE;
+
+    from = vshCommandOptString(cmd, "file", &found);
+    if (!found) {
+        virDomainFree(dom);
+        return FALSE;
+    }
+
+    fd = open(from, O_RDONLY);
+    if (fd < 0) {
+        vshError(ctl, FALSE, _("Failed to read description file %s"), from);
+        virDomainFree(dom);
+        return FALSE;
+    }
+    l = read(fd, &buffer[0], sizeof(buffer));
+    if ((l <= 0) || (l >= (int) sizeof(buffer))) {
+        vshError(ctl, FALSE, _("Failed to read description file %s"), from);
+        close(fd);
+        virDomainFree(dom);
+        return FALSE;
+    }
+    buffer[l] = 0;
+
+    ret = virDomainDetachDevice(dom, &buffer[0]);
+    if (ret < 0) {
+        vshError(ctl, FALSE, _("Failed to detach device from %s"), from);
+        close(fd);
+        virDomainFree(dom);
+        return FALSE;
+    }
+
+    close(fd);
+    virDomainFree(dom);
+    return TRUE;
+}
+
 
 /*
  * "quit" command
@@ -2467,6 +2600,8 @@ static vshCmdDef commands[] = {
     {"vcpupin", cmdVcpupin, opts_vcpupin, info_vcpupin},
     {"version", cmdVersion, NULL, info_version},
     {"vncdisplay", cmdVNCDisplay, opts_vncdisplay, info_vncdisplay},
+    {"attach-device", cmdAttachDevice, opts_attach_device, info_attach_device},
+    {"detach-device", cmdDetachDevice, opts_detach_device, info_detach_device},
     {NULL, NULL, NULL, NULL}
 };
 
--------------------------------------------------------------------------------


In message <200705111842 IJH95853 739E2KNG aa jp fujitsu com>
   "Re: [Libvir] [RFC] Device attach/detach on virsh"
   "Masayuki Sunou <fj1826dm aa jp fujitsu com>" wrote:

> Hi
> 
> I understood as follows.
> 
> * There is no problem in a proposal 1 and a proposal 2
> * It is better that the user can choose use of XML and use of command-option
>   by the situation
> 
> Therefore, I want to add both proposal 1 and proposal 2 to virsh.
> There is no problem in this opinion?
> 
> And, I am going to correct about naming.
>  vif --> interface
>  vbd --> disk
> 


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