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Blame SOURCES/kvm-dump-guest-memory-cleanup-removing-dump_-error-clean.patch

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From e105226b0203159f15fc932eac668c67686ec923 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 13:38:54 +0100
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Subject: [PATCH 23/41] dump-guest-memory: cleanup: removing
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 dump_{error|cleanup}().
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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: <20171213133912.26176-24-marcandre.lureau@redhat.com>
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Patchwork-id: 78372
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O-Subject: [RHEL-7.5 qemu-kvm PATCH v3 23/41] dump-guest-memory: cleanup: removing dump_{error|cleanup}().
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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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It might be a little bit confusing and error prone to do
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dump_cleanup() in these two functions. A better way is to do
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dump_cleanup() before dump finish, no matter whether dump has
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succeeded or not.
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Signed-off-by: Peter Xu <peterx@redhat.com>
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Reviewed-by: Fam Zheng <famz@redhat.com>
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Message-Id: <1455772616-8668-2-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 e3517a529913a2a48c12ba8eef4975ad561af97c)
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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 | 78 +++++++++++++++++++++++++++---------------------------------------
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 1 file changed, 32 insertions(+), 46 deletions(-)
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diff --git a/dump.c b/dump.c
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index a359c29..790bfe4 100644
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--- a/dump.c
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+++ b/dump.c
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@@ -81,12 +81,6 @@ static int dump_cleanup(DumpState *s)
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     return 0;
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 }
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-static void dump_error(DumpState *s, const char *reason, Error **errp)
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-{
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-    dump_cleanup(s);
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-    error_setg(errp, "%s", reason);
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-}
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-
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 static int fd_write_vmcore(const void *buf, size_t size, void *opaque)
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 {
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     DumpState *s = opaque;
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@@ -127,7 +121,7 @@ static void write_elf64_header(DumpState *s, Error **errp)
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     ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to write elf header", errp);
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+        error_setg(errp, "dump: failed to write elf header");
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     }
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 }
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@@ -158,7 +152,7 @@ static void write_elf32_header(DumpState *s, Error **errp)
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     ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to write elf header", errp);
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+        error_setg(errp, "dump: failed to write elf header");
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     }
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 }
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@@ -181,7 +175,7 @@ static void write_elf64_load(DumpState *s, MemoryMapping *memory_mapping,
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     ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to write program header table", errp);
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+        error_setg(errp, "dump: failed to write program header table");
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     }
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 }
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@@ -204,7 +198,7 @@ static void write_elf32_load(DumpState *s, MemoryMapping *memory_mapping,
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     ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to write program header table", errp);
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+        error_setg(errp, "dump: failed to write program header table");
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     }
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 }
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@@ -224,7 +218,7 @@ static void write_elf64_note(DumpState *s, Error **errp)
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     ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to write program header table", errp);
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+        error_setg(errp, "dump: failed to write program header table");
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     }
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 }
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@@ -246,7 +240,7 @@ static void write_elf64_notes(WriteCoreDumpFunction f, DumpState *s,
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         id = cpu_index(cpu);
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         ret = cpu_write_elf64_note(f, cpu, id, s);
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         if (ret < 0) {
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-            dump_error(s, "dump: failed to write elf notes", errp);
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+            error_setg(errp, "dump: failed to write elf notes");
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             return;
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         }
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     }
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@@ -255,7 +249,7 @@ static void write_elf64_notes(WriteCoreDumpFunction f, DumpState *s,
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         cpu = ENV_GET_CPU(env);
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         ret = cpu_write_elf64_qemunote(f, cpu, s);
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         if (ret < 0) {
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-            dump_error(s, "dump: failed to write CPU status", errp);
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+            error_setg(errp, "dump: failed to write CPU status");
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             return;
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         }
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     }
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@@ -277,7 +271,7 @@ static void write_elf32_note(DumpState *s, Error **errp)
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     ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to write program header table", errp);
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+        error_setg(errp, "dump: failed to write program header table");
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     }
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 }
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@@ -294,7 +288,7 @@ static void write_elf32_notes(WriteCoreDumpFunction f, DumpState *s,
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         id = cpu_index(cpu);
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         ret = cpu_write_elf32_note(f, cpu, id, s);
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         if (ret < 0) {
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-            dump_error(s, "dump: failed to write elf notes", errp);
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+            error_setg(errp, "dump: failed to write elf notes");
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             return;
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         }
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     }
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@@ -303,7 +297,7 @@ static void write_elf32_notes(WriteCoreDumpFunction f, DumpState *s,
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         cpu = ENV_GET_CPU(env);
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         ret = cpu_write_elf32_qemunote(f, cpu, s);
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         if (ret < 0) {
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-            dump_error(s, "dump: failed to write CPU status", errp);
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+            error_setg(errp, "dump: failed to write CPU status");
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             return;
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         }
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     }
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@@ -331,7 +325,7 @@ static void write_elf_section(DumpState *s, int type, Error **errp)
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     ret = fd_write_vmcore(&shdr, shdr_size, s);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to write section header table", errp);
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+        error_setg(errp, "dump: failed to write section header table");
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     }
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 }
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@@ -341,7 +335,7 @@ 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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-        dump_error(s, "dump: failed to save memory", errp);
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+        error_setg(errp, "dump: failed to save memory");
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     }
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 }
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@@ -573,11 +567,6 @@ static void dump_begin(DumpState *s, Error **errp)
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     }
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 }
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-static void dump_completed(DumpState *s)
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-{
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-    dump_cleanup(s);
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-}
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-
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 static int get_next_block(DumpState *s, GuestPhysBlock *block)
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 {
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     while (1) {
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@@ -629,8 +618,6 @@ static void dump_iterate(DumpState *s, Error **errp)
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         }
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     } while (!get_next_block(s, block));
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-
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-    dump_completed(s);
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 }
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 static void create_vmcore(DumpState *s, Error **errp)
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@@ -770,7 +757,7 @@ static void create_header32(DumpState *s, Error **errp)
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     dh->status = cpu_to_dump32(s, status);
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     if (write_buffer(s->fd, 0, dh, size) < 0) {
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-        dump_error(s, "dump: failed to write disk dump header", errp);
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+        error_setg(errp, "dump: failed to write disk dump header");
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         goto out;
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     }
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@@ -789,7 +776,7 @@ static void create_header32(DumpState *s, Error **errp)
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     if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS *
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                      block_size, kh, size) < 0) {
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-        dump_error(s, "dump: failed to write kdump sub header", errp);
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+        error_setg(errp, "dump: failed to write kdump sub header");
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         goto out;
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     }
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@@ -805,7 +792,7 @@ static void create_header32(DumpState *s, Error **errp)
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     }
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     if (write_buffer(s->fd, offset_note, s->note_buf,
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                      s->note_size) < 0) {
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-        dump_error(s, "dump: failed to write notes", errp);
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+        error_setg(errp, "dump: failed to write notes");
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         goto out;
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     }
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@@ -870,7 +857,7 @@ static void create_header64(DumpState *s, Error **errp)
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     dh->status = cpu_to_dump32(s, status);
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     if (write_buffer(s->fd, 0, dh, size) < 0) {
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-        dump_error(s, "dump: failed to write disk dump header", errp);
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+        error_setg(errp, "dump: failed to write disk dump header");
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         goto out;
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     }
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@@ -889,7 +876,7 @@ static void create_header64(DumpState *s, Error **errp)
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     if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS *
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                      block_size, kh, size) < 0) {
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-        dump_error(s, "dump: failed to write kdump sub header", errp);
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+        error_setg(errp, "dump: failed to write kdump sub header");
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         goto out;
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     }
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@@ -906,7 +893,7 @@ static void create_header64(DumpState *s, Error **errp)
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     if (write_buffer(s->fd, offset_note, s->note_buf,
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                      s->note_size) < 0) {
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-        dump_error(s, "dump: failed to write notes", errp);
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+        error_setg(errp, "dump: failed to write notes");
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         goto out;
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     }
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@@ -1092,7 +1079,7 @@ static void write_dump_bitmap(DumpState *s, Error **errp)
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     while (get_next_page(&block_iter, &pfn, NULL, s)) {
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         ret = set_dump_bitmap(last_pfn, pfn, true, dump_bitmap_buf, s);
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         if (ret < 0) {
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-            dump_error(s, "dump: failed to set dump_bitmap", errp);
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+            error_setg(errp, "dump: failed to set dump_bitmap");
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             goto out;
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         }
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@@ -1109,7 +1096,7 @@ static void write_dump_bitmap(DumpState *s, Error **errp)
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         ret = set_dump_bitmap(last_pfn, last_pfn + bits_per_buf, false,
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                               dump_bitmap_buf, s);
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         if (ret < 0) {
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-            dump_error(s, "dump: failed to sync dump_bitmap", errp);
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+            error_setg(errp, "dump: failed to sync dump_bitmap");
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             goto out;
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         }
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     }
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@@ -1242,7 +1229,7 @@ static void write_dump_pages(DumpState *s, Error **errp)
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     ret = write_cache(&page_data, buf, s->dump_info.page_size, false);
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     g_free(buf);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to write page data (zero page)", errp);
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+        error_setg(errp, "dump: failed to write page data (zero page)");
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         goto out;
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     }
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@@ -1258,7 +1245,7 @@ static void write_dump_pages(DumpState *s, Error **errp)
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             ret = write_cache(&page_desc, &pd_zero, sizeof(PageDescriptor),
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                               false);
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             if (ret < 0) {
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-                dump_error(s, "dump: failed to write page desc", errp);
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+                error_setg(errp, "dump: failed to write page desc");
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                 goto out;
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             }
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         } else {
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@@ -1283,7 +1270,7 @@ static void write_dump_pages(DumpState *s, Error **errp)
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                 ret = write_cache(&page_data, buf_out, size_out, false);
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                 if (ret < 0) {
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-                    dump_error(s, "dump: failed to write page data", errp);
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+                    error_setg(errp, "dump: failed to write page data");
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                     goto out;
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                 }
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 #ifdef CONFIG_LZO
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@@ -1296,7 +1283,7 @@ static void write_dump_pages(DumpState *s, Error **errp)
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                 ret = write_cache(&page_data, buf_out, size_out, false);
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                 if (ret < 0) {
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-                    dump_error(s, "dump: failed to write page data", errp);
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+                    error_setg(errp, "dump: failed to write page data");
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                     goto out;
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                 }
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 #endif
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@@ -1310,7 +1297,7 @@ static void write_dump_pages(DumpState *s, Error **errp)
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                 ret = write_cache(&page_data, buf_out, size_out, false);
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                 if (ret < 0) {
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-                    dump_error(s, "dump: failed to write page data", errp);
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+                    error_setg(errp, "dump: failed to write page data");
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                     goto out;
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                 }
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 #endif
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@@ -1326,7 +1313,7 @@ static void write_dump_pages(DumpState *s, Error **errp)
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                 ret = write_cache(&page_data, buf,
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                                   s->dump_info.page_size, false);
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                 if (ret < 0) {
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-                    dump_error(s, "dump: failed to write page data", errp);
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+                    error_setg(errp, "dump: failed to write page data");
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                     goto out;
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                 }
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             }
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@@ -1338,7 +1325,7 @@ static void write_dump_pages(DumpState *s, Error **errp)
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             ret = write_cache(&page_desc, &pd, sizeof(PageDescriptor), false);
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             if (ret < 0) {
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-                dump_error(s, "dump: failed to write page desc", errp);
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+                error_setg(errp, "dump: failed to write page desc");
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                 goto out;
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             }
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         }
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@@ -1346,12 +1333,12 @@ static void write_dump_pages(DumpState *s, Error **errp)
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     ret = write_cache(&page_desc, NULL, 0, true);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to sync cache for page_desc", errp);
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+        error_setg(errp, "dump: failed to sync cache for page_desc");
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         goto out;
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     }
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     ret = write_cache(&page_data, NULL, 0, true);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to sync cache for page_data", errp);
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+        error_setg(errp, "dump: failed to sync cache for page_data");
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         goto out;
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     }
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@@ -1395,7 +1382,7 @@ static void create_kdump_vmcore(DumpState *s, Error **errp)
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     ret = write_start_flat_header(s->fd);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to write start flat header", errp);
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+        error_setg(errp, "dump: failed to write start flat header");
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         return;
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     }
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@@ -1419,11 +1406,9 @@ static void create_kdump_vmcore(DumpState *s, Error **errp)
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     ret = write_end_flat_header(s->fd);
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     if (ret < 0) {
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-        dump_error(s, "dump: failed to write end flat header", errp);
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+        error_setg(errp, "dump: failed to write end flat header");
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         return;
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     }
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-
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-    dump_completed(s);
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 }
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 static ram_addr_t get_start_block(DumpState *s)
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@@ -1711,6 +1696,7 @@ void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin,
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         create_vmcore(s, errp);
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     }
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+    dump_cleanup(s);
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     g_free(s);
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 }
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-- 
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1.8.3.1
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