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target/s390x/arch_dump: Add arch cleanup function for PV dumps 

PV dumps block vcpu runs until dump end is reached. If there's an
error between PV dump init and PV dump end the vm will never be able
to run again. One example of such an error is insufficient disk space
for the dump file.

Let's add a cleanup function that tries to do a dump end. The dump
completion data is discarded but there's no point in writing it to a
file anyway if there's a possibility that other PV dump data is
missing.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20231109120443.185979-4-frankja@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
master
Janosch Frank 2023-11-09 12:04:43 +00:00 committed by Thomas Huth
parent e72629e514
commit d12a91e0ba
1 changed files with 17 additions and 0 deletions
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17
target/s390x/arch_dump.c
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@ -433,6 +433,22 @@ static int arch_sections_write(DumpState *s, uint8_t *buff)
return 0;
}
static void arch_cleanup(DumpState *s)
{
g_autofree uint8_t *buff = NULL;
int rc;
if (!pv_dump_initialized) {
return;
}
buff = g_malloc(kvm_s390_pv_dmp_get_size_completion_data());
rc = kvm_s390_dump_completion_data(buff);
if (!rc) {
pv_dump_initialized = false;
}
}
int cpu_get_dump_info(ArchDumpInfo *info,
const struct GuestPhysBlockList *guest_phys_blocks)
{
@ -448,6 +464,7 @@ int cpu_get_dump_info(ArchDumpInfo *info,
info->arch_sections_add_fn = *arch_sections_add;
info->arch_sections_write_hdr_fn = *arch_sections_write_hdr;
info->arch_sections_write_fn = *arch_sections_write;
info->arch_cleanup_fn = *arch_cleanup;
}
return 0;
}