@@ -114,6 +114,7 @@ void qemu_announce_self(void)
/* savevm/loadvm support */
#define IO_BUF_SIZE 32768
+#define MAX_IOV_SIZE MIN(IOV_MAX, 64)
struct QEMUFile {
const QEMUFileOps *ops;
@@ -129,6 +130,9 @@ struct QEMUFile {
int buf_size; /* 0 when writing */
uint8_t buf[IO_BUF_SIZE];
+ struct iovec iov[MAX_IOV_SIZE];
+ unsigned int iovcnt;
+
int last_error;
};
@@ -528,6 +532,7 @@ static void qemu_fflush(QEMUFile *f)
f->pos += f->buf_index;
}
f->buf_index = 0;
+ f->iovcnt = 0;
}
if (ret < 0) {
qemu_file_set_error(f, ret);
@@ -620,12 +625,14 @@ void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
if (l > size)
l = size;
memcpy(f->buf + f->buf_index, buf, l);
+ f->iov[f->iovcnt].iov_base = f->buf + f->buf_index;
+ f->iov[f->iovcnt++].iov_len = l;
f->is_write = 1;
f->buf_index += l;
f->bytes_xfer += l;
buf += l;
size -= l;
- if (f->buf_index >= IO_BUF_SIZE) {
+ if (f->buf_index >= IO_BUF_SIZE || f->iovcnt >= MAX_IOV_SIZE) {
qemu_fflush(f);
if (qemu_file_get_error(f)) {
break;
@@ -649,8 +656,10 @@ void qemu_put_byte(QEMUFile *f, int v)
f->buf[f->buf_index++] = v;
f->is_write = 1;
f->bytes_xfer++;
+ f->iov[f->iovcnt].iov_base = f->buf + (f->buf_index - 1);
+ f->iov[f->iovcnt++].iov_len = 1;
- if (f->buf_index >= IO_BUF_SIZE) {
+ if (f->buf_index >= IO_BUF_SIZE || f->iovcnt >= MAX_IOV_SIZE) {
qemu_fflush(f);
}
}