From 65d64f362326a57b590b8b76e3422030a2aa5c44 Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Thu, 18 Feb 2016 13:16:49 +0800 Subject: [PATCH] dump-guest-memory: add dump_in_progress() helper function For now, it has no effect. It will be used in dump detach support. Signed-off-by: Peter Xu Reviewed-by: Fam Zheng Message-Id: <1455772616-8668-5-git-send-email-peterx@redhat.com> Signed-off-by: Paolo Bonzini --- dump.c | 13 +++++++++++++ include/qemu-common.h | 4 ++++ qmp.c | 14 ++++++++++++++ 3 files changed, 31 insertions(+) diff --git a/dump.c b/dump.c index 434bc60bc9..158d6ea915 100644 --- a/dump.c +++ b/dump.c @@ -1450,6 +1450,12 @@ static void dump_state_prepare(DumpState *s) *s = (DumpState) { .status = DUMP_STATUS_ACTIVE }; } +bool dump_in_progress(void) +{ + DumpState *state = &dump_state_global; + return (state->status == DUMP_STATUS_ACTIVE); +} + static void dump_init(DumpState *s, int fd, bool has_format, DumpGuestMemoryFormat format, bool paging, bool has_filter, int64_t begin, int64_t length, Error **errp) @@ -1628,6 +1634,13 @@ void qmp_dump_guest_memory(bool paging, const char *file, DumpState *s; Error *local_err = NULL; + /* if there is a dump in background, we should wait until the dump + * finished */ + if (dump_in_progress()) { + error_setg(errp, "There is a dump in process, please wait."); + return; + } + /* * kdump-compressed format need the whole memory dumped, so paging or * filter is not supported here. diff --git a/include/qemu-common.h b/include/qemu-common.h index f557be78e3..59ab7598d8 100644 --- a/include/qemu-common.h +++ b/include/qemu-common.h @@ -494,4 +494,8 @@ int parse_debug_env(const char *name, int max, int initial); const char *qemu_ether_ntoa(const MACAddr *mac); void page_size_init(void); +/* returns non-zero if dump is in progress, otherwise zero is + * returned. */ +bool dump_in_progress(void); + #endif diff --git a/qmp.c b/qmp.c index 9a93d5e246..3f16a77b44 100644 --- a/qmp.c +++ b/qmp.c @@ -103,6 +103,13 @@ void qmp_quit(Error **errp) void qmp_stop(Error **errp) { + /* if there is a dump in background, we should wait until the dump + * finished */ + if (dump_in_progress()) { + error_setg(errp, "There is a dump in process, please wait."); + return; + } + if (runstate_check(RUN_STATE_INMIGRATE)) { autostart = 0; } else { @@ -175,6 +182,13 @@ void qmp_cont(Error **errp) BlockBackend *blk; BlockDriverState *bs; + /* if there is a dump in background, we should wait until the dump + * finished */ + if (dump_in_progress()) { + error_setg(errp, "There is a dump in process, please wait."); + return; + } + if (runstate_needs_reset()) { error_setg(errp, "Resetting the Virtual Machine is required"); return;