[xen staging] tools/xenstored: Read event channel from xenstored page

[patchbot@xxxxxxx]

commit f78895ad78c9534e4e5b81ed54422d38c68c2d12
Author:     Jason Andryuk <jason.andryuk@xxxxxxx>
AuthorDate: Fri Aug 15 17:35:49 2025 -0400
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Aug 19 11:03:37 2025 +0200

    tools/xenstored: Read event channel from xenstored page
    
    Make introduce_domain() use an event channel from the the xenstore page.
    It is only used if non-zero.  Otherwise the passed in event channel port
    is used.
    
    The is useful for a xenstored stubdom to configure domains autonomously.
    
    Signed-off-by: Jason Andryuk <jason.andryuk@xxxxxxx>
    Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
---
 tools/xenstored/domain.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/xenstored/domain.c b/tools/xenstored/domain.c
index 34ebeaac9b..60d398682f 100644
--- a/tools/xenstored/domain.c
+++ b/tools/xenstored/domain.c
@@ -1036,6 +1036,10 @@ static struct domain *introduce_domain(const void *ctx,
                interface = map_interface(domid);
                if (!interface && !restore)
                        return NULL;
+
+               if (interface->evtchn_port)
+                       port = interface->evtchn_port;
+
                if (new_domain(domain, port, restore)) {
                        rc = errno;
                        if (interface)
--
generated by git-patchbot for /home/xen/git/xen.git#staging