[libvirt] [PATCH 3/3 v5] virsh: allow the user to specify vmcore's format

[Wen Congyang]

Add a new parameter --memory-only for 'virsh dump' command. So
the user can decide the vmcore's format.
---
 tools/virsh.c   |    3 +++
 tools/virsh.pod |    5 ++++-
 2 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/tools/virsh.c b/tools/virsh.c
index abcfbff..c875a90 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -4006,6 +4006,7 @@ static const vshCmdOptDef opts_dump[] = {
     {"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
     {"file", VSH_OT_DATA, VSH_OFLAG_REQ, N_("where to dump the core")},
     {"verbose", VSH_OT_BOOL, 0, N_("display the progress of dump")},
+    {"memory-only", VSH_OT_BOOL, 0, N_("dump domain's memory only")},
     {NULL, 0, 0, NULL}
 };
 
@@ -4044,6 +4045,8 @@ doDump(void *opaque)
         flags |= VIR_DUMP_BYPASS_CACHE;
     if (vshCommandOptBool(cmd, "reset"))
         flags |= VIR_DUMP_RESET;
+    if (vshCommandOptBool(cmd, "memory-only"))
+        flags |= VIR_DUMP_MEMORY_ONLY;
 
     if (virDomainCoreDump(dom, to, flags) < 0) {
         vshError(ctl, _("Failed to core dump domain %s to %s"), name, to);
diff --git a/tools/virsh.pod b/tools/virsh.pod
index ef71717..e870c03 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -827,7 +827,7 @@ the I<format> argument must be B<qemu-argv>. For Xen hypervisor, the
 I<format> argument may be B<xen-xm> or B<xen-sxpr>.
 
 =item B<dump> I<domain-id> I<corefilepath> [I<--bypass-cache>]
-{ [I<--live>] | [I<--crash>] | [I<--reset>] } [I<--verbose>]
+{ [I<--live>] | [I<--crash>] | [I<--reset>] } [I<--verbose>] [I<--memory-only>]
 
 Dumps the core of a domain to a file for analysis.
 If I<--live> is specified, the domain continues to run until the core
@@ -838,6 +838,9 @@ If I<--reset> is specified, the domain is reset after successful dump.
 Note, these three switches are mutually exclusive.
 If I<--bypass-cache> is specified, the save will avoid the file system
 cache, although this may slow down the operation.
+If I<--memory-only> is specified, the file is elf file, and will only
+include domain's memory and cpu common register value. It is very
+useful if the domain uses host devices directly.
 
 The progress may be monitored using B<domjobinfo> virsh command and canceled
 with B<domjobabort> command (sent by another virsh instance). Another option
-- 
1.7.1