Re: [Qemu-devel] [PATCH v4 05/11] dump-guest-memory: introduce dump_process() helper function.

[Fam Zheng <famz@redhat.com>]

On Tue, 12/01 21:28, Peter Xu wrote:
> No functional change. Cleanup only.
> 
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  dump.c                | 35 ++++++++++++++++++++++-------------
>  include/sysemu/dump.h |  3 +++
>  2 files changed, 25 insertions(+), 13 deletions(-)
> 
> diff --git a/dump.c b/dump.c
> index 3cf75db..e46749d 100644
> --- a/dump.c
> +++ b/dump.c
> @@ -1441,6 +1441,9 @@ static void dump_init(DumpState *s, int fd, bool has_format,
>      Error *err = NULL;
>      int ret;
>  
> +    s->has_format = has_format;
> +    s->format = format;
> +
>      /* kdump-compressed is conflict with paging and filter */
>      if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
>          assert(!paging && !has_filter);
> @@ -1594,6 +1597,24 @@ cleanup:
>      dump_cleanup(s);
>  }
>  
> +/* this operation might be time consuming. */
> +static void dump_process(DumpState *s, Error **errp)
> +{
> +    if (s->has_format && s->format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
> +        create_kdump_vmcore(s, errp);
> +    } else {
> +        create_vmcore(s, errp);
> +    }
> +
> +    if (*errp) {
> +        s->status = DUMP_STATUS_FAILED;
> +    } else {
> +        s->status = DUMP_STATUS_COMPLETED;
> +    }

As in patch 3, this should use local_err + error_propagate.

> +
> +    dump_cleanup(s);
> +}
> +
>  void qmp_dump_guest_memory(bool paging, const char *file,
>                             bool has_detach, bool detach,
>                             bool has_begin, int64_t begin, bool has_length,
> @@ -1679,19 +1700,7 @@ void qmp_dump_guest_memory(bool paging, const char *file,
>          return;
>      }
>  
> -    if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
> -        create_kdump_vmcore(s, errp);
> -    } else {
> -        create_vmcore(s, errp);
> -    }
> -
> -    if (*errp) {
> -        s->status = DUMP_STATUS_FAILED;
> -    } else {
> -        s->status = DUMP_STATUS_COMPLETED;
> -    }
> -
> -    dump_cleanup(s);
> +    dump_process(s, errp);
>  }
>  
>  DumpGuestMemoryCapability *qmp_query_dump_guest_memory_capability(Error **errp)
> diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
> index affef38..d6f4a9c 100644
> --- a/include/sysemu/dump.h
> +++ b/include/sysemu/dump.h
> @@ -185,6 +185,9 @@ typedef struct DumpState {
>      size_t num_dumpable;        /* number of page that can be dumped */
>      uint32_t flag_compress;     /* indicate the compression format */
>      DumpStatus status;          /* current dump status */
> +
> +    bool has_format;              /* whether format is provided */
> +    DumpGuestMemoryFormat format; /* valid only if has_format == true */
>  } DumpState;
>  
>  uint16_t cpu_to_dump16(DumpState *s, uint16_t val);
> -- 
> 2.4.3
>