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From 83178d872394db83d8e4cc91f34edd7c2af43bc2 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 17:18:12 +0100
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Subject: [PATCH 25/41] dump: hoist lzo_init() from get_len_buf_out() to
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dump_init()
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Message-id: <1415380693-16593-26-git-send-email-lersek@redhat.com>
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Patchwork-id: 62208
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O-Subject: [RHEL-7.1 qemu-kvm PATCH 25/26] dump: hoist lzo_init() from get_len_buf_out() to dump_init()
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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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qmp_dump_guest_memory()
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dump_init()
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lzo_init() <---------+
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create_kdump_vmcore() |
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write_dump_pages() |
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get_len_buf_out() |
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lzo_init() ------+
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This patch doesn't change the fact that lzo_init() is called for every
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LZO-compressed dump, but it makes get_len_buf_out() more focused (single
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responsibility).
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Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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(cherry picked from commit c998acb03df614ddf2f3e206582586f191d07fff)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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dump.c | 13 ++++++-------
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1 file changed, 6 insertions(+), 7 deletions(-)
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diff --git a/dump.c b/dump.c
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index 450f658..f980354 100644
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--- a/dump.c
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+++ b/dump.c
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@@ -1237,13 +1237,6 @@ static size_t get_len_buf_out(size_t page_size, uint32_t flag_compress)
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/* buf size for lzo */
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#ifdef CONFIG_LZO
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- if (flag_compress & DUMP_DH_COMPRESSED_LZO) {
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- if (lzo_init() != LZO_E_OK) {
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- /* return 0 to indicate lzo is unavailable */
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- return 0;
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- }
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- }
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-
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/*
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* LZO will expand incompressible data by a little amount. please check the
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* following URL to see the expansion calculation:
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@@ -1631,6 +1624,12 @@ static int dump_init(DumpState *s, int fd, bool has_format,
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break;
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case DUMP_GUEST_MEMORY_FORMAT_KDUMP_LZO:
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+#ifdef CONFIG_LZO
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+ if (lzo_init() != LZO_E_OK) {
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+ error_setg(errp, "failed to initialize the LZO library");
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+ goto cleanup;
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+ }
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+#endif
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s->flag_compress = DUMP_DH_COMPRESSED_LZO;
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break;
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--
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1.8.3.1
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