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From 251ac1dcd456c524eb7b79507c4a8a1bf4a4fa32 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 17:17:54 +0100
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Subject: [PATCH 07/41] dump: add API to write elf notes to buffer
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Message-id: <1415380693-16593-8-git-send-email-lersek@redhat.com>
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Patchwork-id: 62193
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O-Subject: [RHEL-7.1 qemu-kvm PATCH 07/26] dump: add API to write elf notes to buffer
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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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the function can be used by write_elf32_notes/write_elf64_notes to write notes
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to a buffer. If fd_write_vmcore is used, write_elf32_notes/write_elf64_notes
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will write elf notes to vmcore directly. Instead, if buf_write_note is used,
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elf notes will be written to opaque->note_buf at first.
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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 4835ef7784502c231f243c3133054850d23dd837)
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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 | 19 +++++++++++++++++++
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1 file changed, 19 insertions(+)
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diff --git a/dump.c b/dump.c
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index 710893f..3c6d526 100644
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--- a/dump.c
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+++ b/dump.c
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@@ -76,6 +76,9 @@ typedef struct DumpState {
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int64_t begin;
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int64_t length;
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Error **errp;
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+
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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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} DumpState;
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static int dump_cleanup(DumpState *s)
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@@ -755,6 +758,22 @@ static int write_buffer(int fd, off_t offset, const void *buf, size_t size)
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return 0;
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}
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+static int buf_write_note(const void *buf, size_t size, void *opaque)
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+{
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+ DumpState *s = opaque;
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+
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+ /* note_buf is not enough */
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+ if (s->note_buf_offset + size > s->note_size) {
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+ return -1;
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+ }
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+
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+ memcpy(s->note_buf + s->note_buf_offset, buf, size);
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+
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+ s->note_buf_offset += size;
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+
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+ return 0;
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+}
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+
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static ram_addr_t get_start_block(DumpState *s)
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{
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GuestPhysBlock *block;
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--
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1.8.3.1
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