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From f7d193539a8a7194ee3506642b68e0e52619cdf9 Mon Sep 17 00:00:00 2001
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Message-Id: <f7d193539a8a7194ee3506642b68e0e52619cdf9@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Tue, 31 Jan 2023 15:25:57 +0100
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Subject: [PATCH] qemu: fd: Add helpers allowing storing FD set data in status
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XML
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Rollback of FD sets passed to qemu is also needed after possible restart
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of libvirtd when we need to serialize the data into status XML. For this
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purpose we need to access the fdset ID once it was passed to qemu and
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potentially re-create a 'qemuFDPass' struct in passed state.
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Introduce 'qemuFDPassNewPassed' and 'qemuFDPassIsPassed'.
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
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(cherry picked from commit 5598c10c6464887a99928de48fb2fc3e4f1696dc)
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https://bugzilla.redhat.com/show_bug.cgi?id=2040272
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---
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src/qemu/qemu_fd.c | 41 +++++++++++++++++++++++++++++++++++++++++
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src/qemu/qemu_fd.h | 7 +++++++
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2 files changed, 48 insertions(+)
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diff --git a/src/qemu/qemu_fd.c b/src/qemu/qemu_fd.c
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index ebeeb65505..f5eedb88ec 100644
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--- a/src/qemu/qemu_fd.c
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+++ b/src/qemu/qemu_fd.c
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@@ -96,6 +96,47 @@ qemuFDPassNew(const char *prefix,
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}
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+/**
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+ * qemuFDPassNewPassed:
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+ * @fdSetID: ID of an FDset which was allready passed to qemu
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+ *
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+ * Create qemuFDPass pointing to an already passed FD. Useful to usw with
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+ * qemuFDPassTransferMonitorRollback, when restoring after restart.
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+ */
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+qemuFDPass *
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+qemuFDPassNewPassed(unsigned int fdSetID)
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+{
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+ qemuFDPass *fdpass = g_new0(qemuFDPass, 1);
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+
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+ fdpass->fdSetID = fdSetID;
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+ fdpass->passed = true;
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+
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+ return fdpass;
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+}
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+
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+
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+/**
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+ * qemuFDPassIsPassed:
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+ * @fdpass: The fd passing helper struct
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+ * @id: when non-NULL filled with the fdset ID
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+ *
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+ * Returns true if @fdpass was passed to qemu. In such case @id is also filled
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+ * with the ID of the fdset if non-NULL.
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+ */
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+bool
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+qemuFDPassIsPassed(qemuFDPass *fdpass,
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+ unsigned *id)
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+{
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+ if (!fdpass || !fdpass->passed)
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+ return false;
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+
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+ if (id)
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+ *id = fdpass->fdSetID;
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+
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+ return true;
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+}
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+
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+
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/**
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* qemuFDPassAddFD:
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* @fdpass: The fd passing helper struct
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diff --git a/src/qemu/qemu_fd.h b/src/qemu/qemu_fd.h
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index 032b9442ee..cd0ff2c690 100644
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--- a/src/qemu/qemu_fd.h
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+++ b/src/qemu/qemu_fd.h
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@@ -31,6 +31,13 @@ qemuFDPass *
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qemuFDPassNew(const char *prefix,
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void *dompriv);
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+qemuFDPass *
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+qemuFDPassNewPassed(unsigned int fdSetID);
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+
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+bool
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+qemuFDPassIsPassed(qemuFDPass *fdpass,
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+ unsigned *id);
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+
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void
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qemuFDPassAddFD(qemuFDPass *fdpass,
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int *fd,
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--
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2.39.1
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