hmp: dump-guest-memory: hardcode protocol argument to "file:"

Today, it's necessary to specify the protocol you want to use
when dumping the guest memory, for example:

 (qemu) dump-guest-memory file:/tmp/guest-memory

This has a few issues:

 1. It's cumbersome to type
 2. We loose file path autocompletion
 3. Being able to specify fd:X in HMP makes little sense for humans

Because of these reasons, hardcode the 'protocol' argument to
'file:' in HMP.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/hmp.c b/hmp.c
index ba6fbd3..2de3140 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1042,11 +1042,12 @@ void hmp_dump_guest_memory(Monitor *mon, const QDict *qdict)
 {
     Error *errp = NULL;
     int paging = qdict_get_try_bool(qdict, "paging", 0);
-    const char *file = qdict_get_str(qdict, "protocol");
+    const char *file = qdict_get_str(qdict, "filename");
     bool has_begin = qdict_haskey(qdict, "begin");
     bool has_length = qdict_haskey(qdict, "length");
     int64_t begin = 0;
     int64_t length = 0;
+    char *prot;
 
     if (has_begin) {
         begin = qdict_get_int(qdict, "begin");
@@ -1055,9 +1056,12 @@ void hmp_dump_guest_memory(Monitor *mon, const QDict *qdict)
         length = qdict_get_int(qdict, "length");
     }
 
-    qmp_dump_guest_memory(paging, file, has_begin, begin, has_length, length,
+    prot = g_strconcat("file:", file, NULL);
+
+    qmp_dump_guest_memory(paging, prot, has_begin, begin, has_length, length,
                           &errp);
     hmp_handle_error(mon, &errp);
+    g_free(prot);
 }
 
 void hmp_netdev_add(Monitor *mon, const QDict *qdict)