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authorOrit Wasserman <owasserm@redhat.com>2013-03-22 16:48:01 +0200
committerJuan Quintela <quintela@redhat.com>2013-03-26 13:32:33 +0100
commitcb88aa88d7e96cd12328915b33bf4a1bc054aa3f (patch)
tree4b0a457080ff41850f96f0cd4f66000dcc357226 /savevm.c
parentb3ea2bdb792f6d961ba3adf45cf1f0c63c61e09d (diff)
downloadqemu-arm-cb88aa88d7e96cd12328915b33bf4a1bc054aa3f.tar.gz
Use writev ops if available
Update qemu_fflush and stdio_close to use writev ops if they are available Use the buffers stored in the iovec. Signed-off-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'savevm.c')
-rw-r--r--savevm.c31
1 files changed, 23 insertions, 8 deletions
diff --git a/savevm.c b/savevm.c
index aaaf39a678..1d929878ae 100644
--- a/savevm.c
+++ b/savevm.c
@@ -293,7 +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;
@@ -516,20 +516,35 @@ static void qemu_file_set_error(QEMUFile *f, int ret)
}
}
-/** Flushes QEMUFile 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;
+ int i = 0;
- if (!f->ops->put_buffer) {
+ if (!f->ops->writev_buffer && !f->ops->put_buffer) {
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->is_write && f->iovcnt > 0) {
+ if (f->ops->writev_buffer) {
+ ret = f->ops->writev_buffer(f->opaque, f->iov, f->iovcnt);
+ if (ret >= 0) {
+ f->pos += ret;
+ }
+ } else {
+ for (i = 0; i < f->iovcnt && ret >= 0; i++) {
+ ret = f->ops->put_buffer(f->opaque, f->iov[i].iov_base, f->pos,
+ f->iov[i].iov_len);
+ if (ret >= 0) {
+ f->pos += ret;
+ }
+ }
}
f->buf_index = 0;
f->iovcnt = 0;