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migration: introduce set_blocking function in QEMUFileOps

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Remove the assumption that every QEMUFile implementation has
a file descriptor available by introducing a new function
in QEMUFileOps to change the blocking state of a QEMUFile.

If not set, it will fallback to the original code using
the get_fd method.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <1461751518-12128-7-git-send-email-berrange@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Daniel P. Berrange 2016-04-27 11:04:56 +01:00 • committed by Amit Shah
parent 0436e09f96
commit 06ad513532
3 changed files with 13 additions and 6 deletions
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10
migration/qemu-file.c
View file

@ -684,9 +684,13 @@ size_t qemu_get_counted_string(QEMUFile *f, char buf[256])
*/
void qemu_file_set_blocking(QEMUFile *f, bool block)
{
if (block) {
qemu_set_block(qemu_get_fd(f));
if (f->ops->set_blocking) {
f->ops->set_blocking(f->opaque, block);
} else {
qemu_set_nonblock(qemu_get_fd(f));
if (block) {
qemu_set_block(qemu_get_fd(f));
} else {
qemu_set_nonblock(qemu_get_fd(f));
}
}
}