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From 266135a48594041655e0e2e4b647251bc812670c 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 13:39:03 +0100
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Subject: [PATCH 32/41] kdump: set vmcoreinfo location
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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: <20171213133912.26176-33-marcandre.lureau@redhat.com>
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Patchwork-id: 78383
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O-Subject: [RHEL-7.5 qemu-kvm PATCH v3 32/41] kdump: set vmcoreinfo location
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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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kdump header provides offset and size of the vmcoreinfo content,
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append it if available (skip the ELF note header).
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crash-7.1.9 was the first version that started looking in the
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vmcoreinfo data for phys_base instead of in the kdump_sub_header.
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Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit 9ada575bbafaf6d3724a7f59df9da89776817cac)
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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 | 24 ++++++++++++++++++++++++
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1 file changed, 24 insertions(+)
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diff --git a/dump.c b/dump.c
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index 3bce730..5aeff02 100644
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--- a/dump.c
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+++ b/dump.c
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@@ -855,6 +855,18 @@ static void create_header32(DumpState *s, Error **errp)
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kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL);
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offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size;
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+ if (s->guest_note &&
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+ note_name_equal(s, s->guest_note, "VMCOREINFO")) {
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+ uint64_t hsize, name_size, size_vmcoreinfo_desc, offset_vmcoreinfo;
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+
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+ get_note_sizes(s, s->guest_note,
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+ &hsize, &name_size, &size_vmcoreinfo_desc);
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+ offset_vmcoreinfo = offset_note + s->note_size - s->guest_note_size +
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+ (DIV_ROUND_UP(hsize, 4) + DIV_ROUND_UP(name_size, 4)) * 4;
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+ kh->offset_vmcoreinfo = cpu_to_dump64(s, offset_vmcoreinfo);
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+ kh->size_vmcoreinfo = cpu_to_dump32(s, size_vmcoreinfo_desc);
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+ }
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+
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kh->offset_note = cpu_to_dump64(s, offset_note);
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kh->note_size = cpu_to_dump32(s, s->note_size);
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@@ -955,6 +967,18 @@ static void create_header64(DumpState *s, Error **errp)
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kh->dump_level = cpu_to_dump32(s, DUMP_LEVEL);
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offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size;
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+ if (s->guest_note &&
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+ note_name_equal(s, s->guest_note, "VMCOREINFO")) {
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+ uint64_t hsize, name_size, size_vmcoreinfo_desc, offset_vmcoreinfo;
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+
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+ get_note_sizes(s, s->guest_note,
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+ &hsize, &name_size, &size_vmcoreinfo_desc);
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+ offset_vmcoreinfo = offset_note + s->note_size - s->guest_note_size +
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+ (DIV_ROUND_UP(hsize, 4) + DIV_ROUND_UP(name_size, 4)) * 4;
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+ kh->offset_vmcoreinfo = cpu_to_dump64(s, offset_vmcoreinfo);
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+ kh->size_vmcoreinfo = cpu_to_dump64(s, size_vmcoreinfo_desc);
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+ }
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+
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kh->offset_note = cpu_to_dump64(s, offset_note);
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kh->note_size = cpu_to_dump64(s, s->note_size);
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--
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1.8.3.1
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