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Blame SOURCES/kvm-DumpState-adding-total_size-and-written_size-fields.patch

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From 60e8f031af3ca219ac6344c6028fe009eddf8c19 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
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Date: Wed, 13 Dec 2017 13:38:59 +0100
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Subject: [PATCH 28/41] DumpState: adding total_size and written_size fields
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Marc-André Lureau <marcandre.lureau@redhat.com>
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Message-id: <20171213133912.26176-29-marcandre.lureau@redhat.com>
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Patchwork-id: 78382
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O-Subject: [RHEL-7.5 qemu-kvm PATCH v3 28/41] DumpState: adding total_size and written_size fields
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Bugzilla: 1411490
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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From: Peter Xu <peterx@redhat.com>
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Here, total_size is the size in bytes to be dumped (raw data, which
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means before compression), while written_size are bytes handled (raw
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size too).
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Signed-off-by: Peter Xu <peterx@redhat.com>
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Message-Id: <1455772616-8668-9-git-send-email-peterx@redhat.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 2264c2c96e0a1f0913412da73e9bcaf9f8fa4427)
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RHEL: minor conflict due to "detach" mode not being backported.
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Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 dump.c                | 32 ++++++++++++++++++++++++++++++++
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 include/sysemu/dump.h |  8 ++++++++
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 2 files changed, 40 insertions(+)
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diff --git a/dump.c b/dump.c
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index 8618230..008a722 100644
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--- a/dump.c
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+++ b/dump.c
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@@ -336,6 +336,8 @@ static void write_data(DumpState *s, void *buf, int length, Error **errp)
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     ret = fd_write_vmcore(buf, length, s);
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     if (ret < 0) {
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         error_setg(errp, "dump: failed to save memory");
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+    } else {
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+        s->written_size += length;
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     }
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 }
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@@ -1329,6 +1331,7 @@ static void write_dump_pages(DumpState *s, Error **errp)
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                 goto out;
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             }
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         }
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+        s->written_size += s->dump_info.page_size;
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     }
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     ret = write_cache(&page_desc, NULL, 0, true);
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@@ -1461,6 +1464,30 @@ bool dump_in_progress(void)
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     return (state->status == DUMP_STATUS_ACTIVE);
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 }
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+/* calculate total size of memory to be dumped (taking filter into
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+ * acoount.) */
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+static int64_t dump_calculate_size(DumpState *s)
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+{
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+    GuestPhysBlock *block;
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+    int64_t size = 0, total = 0, left = 0, right = 0;
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+
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+    QTAILQ_FOREACH(block, &s->guest_phys_blocks.head, next) {
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+        if (s->has_filter) {
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+            /* calculate the overlapped region. */
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+            left = MAX(s->begin, block->target_start);
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+            right = MIN(s->begin + s->length, block->target_end);
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+            size = right - left;
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+            size = size > 0 ? size : 0;
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+        } else {
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+            /* count the whole region in */
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+            size = (block->target_end - block->target_start);
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+        }
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+        total += size;
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+    }
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+
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+    return total;
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+}
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+
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 static void dump_init(DumpState *s, int fd, bool has_format,
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                       DumpGuestMemoryFormat format, bool paging, bool has_filter,
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                       int64_t begin, int64_t length, Error **errp)
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@@ -1472,6 +1499,7 @@ static void dump_init(DumpState *s, int fd, bool has_format,
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     s->has_format = has_format;
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     s->format = format;
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+    s->written_size = 0;
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     /* kdump-compressed is conflict with paging and filter */
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     if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
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@@ -1503,6 +1531,10 @@ static void dump_init(DumpState *s, int fd, bool has_format,
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     guest_phys_blocks_init(&s->guest_phys_blocks);
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     guest_phys_blocks_append(&s->guest_phys_blocks);
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+    s->total_size = dump_calculate_size(s);
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+#ifdef DEBUG_DUMP_GUEST_MEMORY
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+    fprintf(stderr, "DUMP: total memory to dump: %lu\n", s->total_size);
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+#endif
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     s->start = get_start_block(s);
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     if (s->start == -1) {
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diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
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index 1da3ddb..b5ebb0a 100644
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--- a/include/sysemu/dump.h
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+++ b/include/sysemu/dump.h
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@@ -181,6 +181,14 @@ typedef struct DumpState {
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     bool has_format;              /* whether format is provided */
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     DumpGuestMemoryFormat format; /* valid only if has_format == true */
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+    int64_t total_size;          /* total memory size (in bytes) to
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+                                  * be dumped. When filter is
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+                                  * enabled, this will only count
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+                                  * those to be written. */
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+    int64_t written_size;        /* written memory size (in bytes),
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+                                  * this could be used to calculate
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+                                  * how much work we have
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+                                  * finished. */
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 } DumpState;
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 uint16_t cpu_to_dump16(DumpState *s, uint16_t val);
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-- 
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1.8.3.1
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