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[Qemu-commits] [COMMIT e19252d] migrate_fd_close: delete associated io-h
From: |
Anthony Liguori |
Subject: |
[Qemu-commits] [COMMIT e19252d] migrate_fd_close: delete associated io-handlerbefore closing the fd |
Date: |
Mon, 15 Jun 2009 02:26:43 -0000 |
From: Uri Lublin <address@hidden>
It may happen that the io-handler is still registered. That causes
select() to return with EBADF, not calling handlers for other fds.
The io-handler would be registered when (on the source) the whole state
was written but not yet flushed. For example when using QEMUFileBuffered,
(tcp-migration) there may be data left in a buffer waiting to be transferred.
In such a case buffered_close() calls buffered_flush() which calls
migrate_fd_put_buffer, which may, upon EAGAIN, register migrate_fd_put_notify
as a handler.
Signed-off-by: Uri Lublin <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>
diff --git a/migration.c b/migration.c
index 401383c..57f2a52 100644
--- a/migration.c
+++ b/migration.c
@@ -301,5 +301,7 @@ void migrate_fd_wait_for_unfreeze(void *opaque)
int migrate_fd_close(void *opaque)
{
FdMigrationState *s = opaque;
+
+ qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
return s->close(s);
}
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