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Blame SOURCES/kvm-dump-add-members-to-DumpState-and-init-some-of-them.patch

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From 1f333717698aecbd70732d4dac609db8eda895d5 Mon Sep 17 00:00:00 2001
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From: Laszlo Ersek <lersek@redhat.com>
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Date: Fri, 7 Nov 2014 17:17:57 +0100
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Subject: [PATCH 10/41] dump: add members to DumpState and init some of them
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Message-id: <1415380693-16593-11-git-send-email-lersek@redhat.com>
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Patchwork-id: 62196
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O-Subject: [RHEL-7.1 qemu-kvm PATCH 10/26] dump: add members to DumpState and init some of them
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Bugzilla: 1157798
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
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RH-Acked-by: dgibson <dgibson@redhat.com>
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From: qiaonuohan <qiaonuohan@cn.fujitsu.com>
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add some members to DumpState that will be used in writing vmcore in
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kdump-compressed format. some of them, like page_size, will be initialized
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in the patch.
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Signed-off-by: Qiao Nuohan <qiaonuohan@cn.fujitsu.com>
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Reviewed-by: Laszlo Ersek <lersek@redhat.com>
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Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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(cherry picked from commit 7aad248d3596a1fb94778f2cd215f86a802b3abb)
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 dump.c                | 28 ++++++++++++++++++++++++++++
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 include/sysemu/dump.h |  7 +++++++
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 2 files changed, 35 insertions(+)
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diff --git a/dump.c b/dump.c
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index 3c6d526..88e8cc0 100644
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--- a/dump.c
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+++ b/dump.c
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@@ -79,6 +79,16 @@ typedef struct DumpState {
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     uint8_t *note_buf;          /* buffer for notes */
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     size_t note_buf_offset;     /* the writing place in note_buf */
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+    uint32_t nr_cpus;           /* number of guest's cpu */
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+    size_t page_size;           /* guest's page size */
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+    uint32_t page_shift;        /* guest's page shift */
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+    uint64_t max_mapnr;         /* the biggest guest's phys-mem's number */
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+    size_t len_dump_bitmap;     /* the size of the place used to store
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+                                   dump_bitmap in vmcore */
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+    off_t offset_dump_bitmap;   /* offset of dump_bitmap part in vmcore */
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+    off_t offset_page;          /* offset of page part in vmcore */
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+    size_t num_dumpable;        /* number of page that can be dumped */
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+    uint32_t flag_compress;     /* indicate the compression format */
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 } DumpState;
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 static int dump_cleanup(DumpState *s)
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@@ -802,6 +812,14 @@ static ram_addr_t get_start_block(DumpState *s)
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     return -1;
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 }
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+static void get_max_mapnr(DumpState *s)
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+{
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+    GuestPhysBlock *last_block;
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+
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+    last_block = QTAILQ_LAST(&s->guest_phys_blocks.head, GuestPhysBlockHead);
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+    s->max_mapnr = paddr_to_pfn(last_block->target_end, s->page_shift);
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+}
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+
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 static int dump_init(DumpState *s, int fd, bool paging, bool has_filter,
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                      int64_t begin, int64_t length, Error **errp)
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 {
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@@ -870,6 +888,16 @@ static int dump_init(DumpState *s, int fd, bool paging, bool has_filter,
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         qemu_get_guest_simple_memory_mapping(&s->list, &s->guest_phys_blocks);
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     }
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+    s->nr_cpus = nr_cpus;
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+    s->page_size = TARGET_PAGE_SIZE;
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+    s->page_shift = ffs(s->page_size) - 1;
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+
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+    get_max_mapnr(s);
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+
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+    uint64_t tmp;
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+    tmp = DIV_ROUND_UP(DIV_ROUND_UP(s->max_mapnr, CHAR_BIT), s->page_size);
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+    s->len_dump_bitmap = tmp * s->page_size;
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+
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     if (s->has_filter) {
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         memory_mapping_filter(&s->list, s->begin, s->length);
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     }
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diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
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index b32b390..995bf47 100644
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--- a/include/sysemu/dump.h
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+++ b/include/sysemu/dump.h
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@@ -20,6 +20,13 @@
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 #define VERSION_FLAT_HEADER         (1)    /* version of flattened format */
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 #define END_FLAG_FLAT_HEADER        (-1)
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+#define ARCH_PFN_OFFSET             (0)
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+
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+#define paddr_to_pfn(X, page_shift) \
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+    (((unsigned long long)(X) >> (page_shift)) - ARCH_PFN_OFFSET)
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+#define pfn_to_paddr(X, page_shift) \
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+    (((unsigned long long)(X) + ARCH_PFN_OFFSET) << (page_shift))
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+
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 typedef struct ArchDumpInfo {
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     int d_machine;  /* Architecture */
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     int d_endian;   /* ELFDATA2LSB or ELFDATA2MSB */
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-- 
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1.8.3.1
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