Update Makefile to actually install the new efi-enabled nic roms that are used by...

[qemu.git] / savevm.c

diff --git a/savevm.c b/savevm.c
index 35c8d1e4453e84e74e3112b4575780a2a2230abd..53515cb794c80d6cc9c6e149e72d77d06ec55cf9 100644 (file)
--- a/savevm.c
+++ b/savevm.c
@@ -39,6 +39,7 @@
 #include "qmp-commands.h"
 #include "trace.h"
 #include "qemu/bitops.h"
+#include "qemu/iov.h"
 
 #define SELF_ANNOUNCE_ROUNDS 5
 
@@ -113,11 +114,11 @@ 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;
     void *opaque;
-    int is_write;
 
     int64_t bytes_xfer;
     int64_t xfer_limit;
@@ -128,6 +129,9 @@ 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;
 };
 
@@ -171,6 +175,20 @@ static void coroutine_fn yield_until_fd_readable(int fd)
     qemu_coroutine_yield();
 }
 
+static ssize_t socket_writev_buffer(void *opaque, struct iovec *iov, int iovcnt,
+                                    int64_t pos)
+{
+    QEMUFileSocket *s = opaque;
+    ssize_t len;
+    ssize_t size = iov_size(iov, iovcnt);
+
+    len = iov_send(s->fd, iov, iovcnt, 0, size);
+    if (len < size) {
+        len = -socket_error();
+    }
+    return len;
+}
+
 static int socket_get_fd(void *opaque)
 {
     QEMUFileSocket *s = opaque;
@@ -275,7 +293,7 @@ static int stdio_fclose(void *opaque)
     QEMUFileStdio *s = opaque;
     int ret = 0;
 
-    if (s->file->ops->put_buffer) {
+    if (s->file->ops->put_buffer || s->file->ops->writev_buffer) {
         int fd = fileno(s->stdio_file);
         struct stat st;
 
@@ -387,6 +405,7 @@ static const QEMUFileOps socket_read_ops = {
 static const QEMUFileOps socket_write_ops = {
     .get_fd =     socket_get_fd,
     .put_buffer = socket_put_buffer,
+    .writev_buffer = socket_writev_buffer,
     .close =      socket_close
 };
 
@@ -403,7 +422,7 @@ QEMUFile *qemu_fopen_socket(int fd, const char *mode)
 
     s->fd = fd;
     if (mode[0] == 'w') {
-        socket_set_block(s->fd);
+        qemu_set_block(s->fd);
         s->file = qemu_fopen_ops(s, &socket_write_ops);
     } else {
         s->file = qemu_fopen_ops(s, &socket_read_ops);
@@ -439,6 +458,21 @@ fail:
     return NULL;
 }
 
+static ssize_t block_writev_buffer(void *opaque, struct iovec *iov, int iovcnt,
+                                   int64_t pos)
+{
+    int ret;
+    QEMUIOVector qiov;
+
+    qemu_iovec_init_external(&qiov, iov, iovcnt);
+    ret = bdrv_writev_vmstate(opaque, &qiov, pos);
+    if (ret < 0) {
+        return ret;
+    }
+
+    return qiov.size;
+}
+
 static int block_put_buffer(void *opaque, const uint8_t *buf,
                            int64_t pos, int size)
 {
@@ -462,8 +496,9 @@ static const QEMUFileOps bdrv_read_ops = {
 };
 
 static const QEMUFileOps bdrv_write_ops = {
-    .put_buffer = block_put_buffer,
-    .close =      bdrv_fclose
+    .put_buffer     = block_put_buffer,
+    .writev_buffer  = block_writev_buffer,
+    .close          = bdrv_fclose
 };
 
 static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
@@ -481,7 +516,6 @@ QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops)
 
     f->opaque = opaque;
     f->ops = ops;
-    f->is_write = 0;
     return f;
 }
 
@@ -497,23 +531,39 @@ static void qemu_file_set_error(QEMUFile *f, int ret)
     }
 }
 
-/** Flushes QEMUFile buffer
+static inline bool qemu_file_is_writable(QEMUFile *f)
+{
+    return f->ops->writev_buffer || f->ops->put_buffer;
+}
+
+/**
+ * Flushes QEMUFile buffer
  *
+ * If there is writev_buffer QEMUFileOps it uses it otherwise uses
+ * put_buffer ops.
  */
 static void qemu_fflush(QEMUFile *f)
 {
-    int ret = 0;
+    ssize_t ret = 0;
 
-    if (!f->ops->put_buffer) {
+    if (!qemu_file_is_writable(f)) {
         return;
     }
-    if (f->is_write && f->buf_index > 0) {
-        ret = f->ops->put_buffer(f->opaque, f->buf, f->pos, f->buf_index);
-        if (ret >= 0) {
-            f->pos += f->buf_index;
+
+    if (f->ops->writev_buffer) {
+        if (f->iovcnt > 0) {
+            ret = f->ops->writev_buffer(f->opaque, f->iov, f->iovcnt, f->pos);
+        }
+    } else {
+        if (f->buf_index > 0) {
+            ret = f->ops->put_buffer(f->opaque, f->buf, f->pos, f->buf_index);
         }
-        f->buf_index = 0;
     }
+    if (ret >= 0) {
+        f->pos += ret;
+    }
+    f->buf_index = 0;
+    f->iovcnt = 0;
     if (ret < 0) {
         qemu_file_set_error(f, ret);
     }
@@ -524,11 +574,7 @@ static void qemu_fill_buffer(QEMUFile *f)
     int len;
     int pending;
 
-    if (!f->ops->get_buffer)
-        return;
-
-    if (f->is_write)
-        abort();
+    assert(!qemu_file_is_writable(f));
 
     pending = f->buf_size - f->buf_index;
     if (pending > 0) {
@@ -586,18 +632,43 @@ int qemu_fclose(QEMUFile *f)
     return ret;
 }
 
-void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
+static void add_to_iovec(QEMUFile *f, const uint8_t *buf, int size)
 {
-    int l;
+    /* check for adjacent buffer and coalesce them */
+    if (f->iovcnt > 0 && buf == f->iov[f->iovcnt - 1].iov_base +
+        f->iov[f->iovcnt - 1].iov_len) {
+        f->iov[f->iovcnt - 1].iov_len += size;
+    } else {
+        f->iov[f->iovcnt].iov_base = (uint8_t *)buf;
+        f->iov[f->iovcnt++].iov_len = size;
+    }
+
+    if (f->iovcnt >= MAX_IOV_SIZE) {
+        qemu_fflush(f);
+    }
+}
+
+void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, int size)
+{
+    if (!f->ops->writev_buffer) {
+        qemu_put_buffer(f, buf, size);
+        return;
+    }
 
     if (f->last_error) {
         return;
     }
 
-    if (f->is_write == 0 && f->buf_index > 0) {
-        fprintf(stderr,
-                "Attempted to write to buffer while read buffer is not empty\n");
-        abort();
+    f->bytes_xfer += size;
+    add_to_iovec(f, buf, size);
+}
+
+void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size)
+{
+    int l;
+
+    if (f->last_error) {
+        return;
     }
 
     while (size > 0) {
@@ -605,17 +676,19 @@ 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->is_write = 1;
+        f->bytes_xfer += size;
+        if (f->ops->writev_buffer) {
+            add_to_iovec(f, f->buf + f->buf_index, l);
+        }
         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) {
             qemu_fflush(f);
-            if (qemu_file_get_error(f)) {
-                break;
-            }
         }
+        if (qemu_file_get_error(f)) {
+            break;
+        }
+        buf += l;
+        size -= l;
     }
 }
 
@@ -625,15 +698,13 @@ void qemu_put_byte(QEMUFile *f, int v)
         return;
     }
 
-    if (f->is_write == 0 && f->buf_index > 0) {
-        fprintf(stderr,
-                "Attempted to write to buffer while read buffer is not empty\n");
-        abort();
+    f->buf[f->buf_index] = v;
+    f->bytes_xfer++;
+    if (f->ops->writev_buffer) {
+        add_to_iovec(f, f->buf + f->buf_index, 1);
     }
-
-    f->buf[f->buf_index++] = v;
-    f->is_write = 1;
-    if (f->buf_index >= IO_BUF_SIZE) {
+    f->buf_index++;
+    if (f->buf_index == IO_BUF_SIZE) {
         qemu_fflush(f);
     }
 }
@@ -650,9 +721,7 @@ static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset)
     int pending;
     int index;
 
-    if (f->is_write) {
-        abort();
-    }
+    assert(!qemu_file_is_writable(f));
 
     index = f->buf_index + offset;
     pending = f->buf_size - index;
@@ -697,9 +766,7 @@ static int qemu_peek_byte(QEMUFile *f, int offset)
 {
     int index = f->buf_index + offset;
 
-    if (f->is_write) {
-        abort();
-    }
+    assert(!qemu_file_is_writable(f));
 
     if (index >= f->buf_size) {
         qemu_fill_buffer(f);
@@ -1072,6 +1139,27 @@ const VMStateInfo vmstate_info_uint64 = {
     .put  = put_uint64,
 };
 
+/* 64 bit unsigned int. See that the received value is the same than the one
+   in the field */
+
+static int get_uint64_equal(QEMUFile *f, void *pv, size_t size)
+{
+    uint64_t *v = pv;
+    uint64_t v2;
+    qemu_get_be64s(f, &v2);
+
+    if (*v == v2) {
+        return 0;
+    }
+    return -EINVAL;
+}
+
+const VMStateInfo vmstate_info_uint64_equal = {
+    .name = "int64 equal",
+    .get  = get_uint64_equal,
+    .put  = put_uint64,
+};
+
 /* 8 bit int. See that the received value is the same than the one
    in the field */
 
@@ -1112,6 +1200,29 @@ const VMStateInfo vmstate_info_uint16_equal = {
     .put  = put_uint16,
 };
 
+/* floating point */
+
+static int get_float64(QEMUFile *f, void *pv, size_t size)
+{
+    float64 *v = pv;
+
+    *v = make_float64(qemu_get_be64(f));
+    return 0;
+}
+
+static void put_float64(QEMUFile *f, void *pv, size_t size)
+{
+    uint64_t *v = pv;
+
+    qemu_put_be64(f, float64_val(*v));
+}
+
+const VMStateInfo vmstate_info_float64 = {
+    .name = "float64",
+    .get  = get_float64,
+    .put  = put_float64,
+};
+
 /* timers  */
 
 static int get_timer(QEMUFile *f, void *pv, size_t size)