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[Qemu-devel] [PATCH 03/19] Introduce skip_header parameter to qemu_loadv
From: |
Yoshiaki Tamura |
Subject: |
[Qemu-devel] [PATCH 03/19] Introduce skip_header parameter to qemu_loadvm_state(). |
Date: |
Tue, 8 Feb 2011 20:01:25 +0900 |
Introduce skip_header parameter to qemu_loadvm_state() so that it can
be called iteratively without reading the header.
Signed-off-by: Yoshiaki Tamura <address@hidden>
---
migration.c | 2 +-
savevm.c | 24 +++++++++++++-----------
sysemu.h | 2 +-
3 files changed, 15 insertions(+), 13 deletions(-)
diff --git a/migration.c b/migration.c
index f0df5fc..dd3bf94 100644
--- a/migration.c
+++ b/migration.c
@@ -63,7 +63,7 @@ int qemu_start_incoming_migration(const char *uri)
void process_incoming_migration(QEMUFile *f)
{
- if (qemu_loadvm_state(f) < 0) {
+ if (qemu_loadvm_state(f, 0) < 0) {
fprintf(stderr, "load of migration failed\n");
exit(0);
}
diff --git a/savevm.c b/savevm.c
index 6c4c72b..58e48e3 100644
--- a/savevm.c
+++ b/savevm.c
@@ -1716,7 +1716,7 @@ typedef struct LoadStateEntry {
int version_id;
} LoadStateEntry;
-int qemu_loadvm_state(QEMUFile *f)
+int qemu_loadvm_state(QEMUFile *f, int skip_header)
{
QLIST_HEAD(, LoadStateEntry) loadvm_handlers =
QLIST_HEAD_INITIALIZER(loadvm_handlers);
@@ -1729,17 +1729,19 @@ int qemu_loadvm_state(QEMUFile *f)
return -EINVAL;
}
- v = qemu_get_be32(f);
- if (v != QEMU_VM_FILE_MAGIC)
- return -EINVAL;
+ if (!skip_header) {
+ v = qemu_get_be32(f);
+ if (v != QEMU_VM_FILE_MAGIC)
+ return -EINVAL;
- v = qemu_get_be32(f);
- if (v == QEMU_VM_FILE_VERSION_COMPAT) {
- fprintf(stderr, "SaveVM v2 format is obsolete and don't work
anymore\n");
- return -ENOTSUP;
+ v = qemu_get_be32(f);
+ if (v == QEMU_VM_FILE_VERSION_COMPAT) {
+ fprintf(stderr, "SaveVM v2 format is obsolete and don't work
anymore\n");
+ return -ENOTSUP;
+ }
+ if (v != QEMU_VM_FILE_VERSION)
+ return -ENOTSUP;
}
- if (v != QEMU_VM_FILE_VERSION)
- return -ENOTSUP;
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
uint32_t instance_id, version_id, section_id;
@@ -2062,7 +2064,7 @@ int load_vmstate(const char *name)
return -EINVAL;
}
- ret = qemu_loadvm_state(f);
+ ret = qemu_loadvm_state(f, 0);
qemu_fclose(f);
if (ret < 0) {
diff --git a/sysemu.h b/sysemu.h
index 23ae17e..c86b4e8 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -81,7 +81,7 @@ int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int
blk_enable,
int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f);
int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f);
void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f);
-int qemu_loadvm_state(QEMUFile *f);
+int qemu_loadvm_state(QEMUFile *f, int skip_header);
/* SLIRP */
void do_info_slirp(Monitor *mon);
--
1.7.1.2
- [Qemu-devel] [PATCH 15/19] savevm: introduce qemu_savevm_trans_{begin, commit}., (continued)
- [Qemu-devel] [PATCH 15/19] savevm: introduce qemu_savevm_trans_{begin, commit}., Yoshiaki Tamura, 2011/02/08
- [Qemu-devel] [PATCH 07/19] Introduce fault tolerant VM transaction QEMUFile and ft_mode., Yoshiaki Tamura, 2011/02/08
- [Qemu-devel] [PATCH 09/19] Introduce event-tap., Yoshiaki Tamura, 2011/02/08
- [Qemu-devel] [PATCH 16/19] migration: introduce migrate_ft_trans_{put, get}_ready(), and modify migrate_fd_put_ready() when ft_mode is on., Yoshiaki Tamura, 2011/02/08
- [Qemu-devel] [PATCH 08/19] savevm: introduce util functions to control ft_trans_file from savevm layer., Yoshiaki Tamura, 2011/02/08
- [Qemu-devel] [PATCH 14/19] block: insert event-tap to bdrv_aio_writev(), bdrv_aio_flush() and bdrv_flush()., Yoshiaki Tamura, 2011/02/08
- [Qemu-devel] [PATCH 18/19] Introduce -k option to enable FT migration mode (Kemari)., Yoshiaki Tamura, 2011/02/08
- [Qemu-devel] [PATCH 02/19] Introduce read() to FdMigrationState., Yoshiaki Tamura, 2011/02/08
- [Qemu-devel] [PATCH 03/19] Introduce skip_header parameter to qemu_loadvm_state().,
Yoshiaki Tamura <=
- [Qemu-devel] [PATCH 05/19] vl.c: add deleted flag for deleting the handler., Yoshiaki Tamura, 2011/02/08