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authorPaolo Bonzini <pbonzini@redhat.com>2013-02-22 17:36:42 +0100
committerJuan Quintela <quintela@redhat.com>2013-03-11 13:32:02 +0100
commite6a1cf21328802f3a83e84e893b8cb8a468141cc (patch)
tree57ca206cbfe0dd6640a9a5f585692016c6182b11 /migration.c
parentf8bbc1286337a8506162b5785babe6f2a7de2476 (diff)
downloadqemu-arm-e6a1cf21328802f3a83e84e893b8cb8a468141cc.tar.gz
migration: use QEMUFile for writing outgoing migration data
Second, drop the file descriptor indirection, and write directly to the QEMUFile. Reviewed-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'migration.c')
-rw-r--r--migration.c46
1 files changed, 8 insertions, 38 deletions
diff --git a/migration.c b/migration.c
index 52126d86cc..681a459812 100644
--- a/migration.c
+++ b/migration.c
@@ -301,25 +301,6 @@ void migrate_fd_error(MigrationState *s)
notifier_list_notify(&migration_state_notifiers, s);
}
-static ssize_t migrate_fd_put_buffer(MigrationState *s, const void *data,
- size_t size)
-{
- ssize_t ret;
-
- if (s->state != MIG_STATE_ACTIVE) {
- return -EIO;
- }
-
- do {
- ret = s->write(s, data, size);
- } while (ret == -1 && ((s->get_error(s)) == EINTR));
-
- if (ret == -1)
- ret = -(s->get_error(s));
-
- return ret;
-}
-
static void migrate_fd_cancel(MigrationState *s)
{
DPRINTF("cancelling migration\n");
@@ -333,7 +314,6 @@ int migrate_fd_close(MigrationState *s)
if (s->migration_file != NULL) {
rc = qemu_fclose(s->migration_file);
s->migration_file = NULL;
- s->fd = -1;
}
return rc;
}
@@ -519,8 +499,7 @@ static int migration_put_buffer(void *opaque, const uint8_t *buf,
int64_t pos, int size)
{
MigrationState *s = opaque;
- ssize_t ret;
- size_t sent;
+ int ret;
DPRINTF("putting %d bytes at %" PRId64 "\n", size, pos);
@@ -528,22 +507,14 @@ static int migration_put_buffer(void *opaque, const uint8_t *buf,
return size;
}
- sent = 0;
- while (size) {
- ret = migrate_fd_put_buffer(s, buf, size);
- if (ret <= 0) {
- DPRINTF("error flushing data, %zd\n", ret);
- return ret;
- } else {
- DPRINTF("flushed %zd byte(s)\n", ret);
- sent += ret;
- buf += ret;
- size -= ret;
- s->bytes_xfer += ret;
- }
+ qemu_put_buffer(s->migration_file, buf, size);
+ ret = qemu_file_get_error(s->migration_file);
+ if (ret) {
+ return ret;
}
- return sent;
+ s->bytes_xfer += size;
+ return size;
}
static int migration_close(void *opaque)
@@ -564,7 +535,7 @@ static int migration_get_fd(void *opaque)
{
MigrationState *s = opaque;
- return s->fd;
+ return qemu_get_fd(s->migration_file);
}
/*
@@ -721,7 +692,6 @@ void migrate_fd_connect(MigrationState *s)
s->xfer_limit = s->bandwidth_limit / XFER_LIMIT_RATIO;
s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s);
- s->fd = qemu_get_fd(s->migration_file);
s->file = qemu_fopen_ops(s, &migration_file_ops);
qemu_thread_create(&s->thread, migration_thread, s,