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HMP: support specifying dump format for dump-guest-memory

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Dumping guest memory is available to specify the dump format now. This patch
adds options '-z|-l|-s' to HMP command dump-guest-memory to specify dumping in
kdump-compression format, with zlib/lzo/snappy compression. And without these
options ELF format will be used.

The discussion about this feature is here:

http://lists.nongnu.org/archive/html/qemu-devel/2014-03/msg04235.html

Signed-off-by: Qiao Nuohan <qiaonuohan@cn.fujitsu.com>
Suggested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> (on s390x/kvm)
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Qiao Nuohan 2014-04-17 16:15:07 +08:00 • committed by Luiz Capitulino
parent c20499d985
commit 1b7a0f758b
2 changed files with 32 additions and 6 deletions
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25
hmp.c
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@ -1308,16 +1308,35 @@ void hmp_dump_guest_memory(Monitor *mon, const QDict *qdict)
{
Error *errp = NULL;
int paging = qdict_get_try_bool(qdict, "paging", 0);
int zlib = qdict_get_try_bool(qdict, "zlib", 0);
int lzo = qdict_get_try_bool(qdict, "lzo", 0);
int snappy = qdict_get_try_bool(qdict, "snappy", 0);
const char *file = qdict_get_str(qdict, "filename");
bool has_begin = qdict_haskey(qdict, "begin");
bool has_length = qdict_haskey(qdict, "length");
/* kdump-compressed format is not supported for HMP */
bool has_format = false;
int64_t begin = 0;
int64_t length = 0;
enum DumpGuestMemoryFormat dump_format = DUMP_GUEST_MEMORY_FORMAT_ELF;
char *prot;
if (zlib + lzo + snappy > 1) {
error_setg(&errp, "only one of '-z|-l|-s' can be set");
hmp_handle_error(mon, &errp);
return;
}
if (zlib) {
dump_format = DUMP_GUEST_MEMORY_FORMAT_KDUMP_ZLIB;
}
if (lzo) {
dump_format = DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO;
}
if (snappy) {
dump_format = DUMP_GUEST_MEMORY_FORMAT_KDUMP_SNAPPY;
}
if (has_begin) {
begin = qdict_get_int(qdict, "begin");
}
@ -1328,7 +1347,7 @@ void hmp_dump_guest_memory(Monitor *mon, const QDict *qdict)
prot = g_strconcat("file:", file, NULL);
qmp_dump_guest_memory(paging, prot, has_begin, begin, has_length, length,
has_format, dump_format, &errp);
true, dump_format, &errp);
hmp_handle_error(mon, &errp);
g_free(prot);
}