[xen staging] tools/xenstore: add reading global state for live update

[patchbot@xxxxxxx]

commit e7217f0b69a87043797da21eda3bc37fd57115fe
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Wed Jan 13 14:00:20 2021 +0100
Commit:     Juergen Gross <jgross@xxxxxxxx>
CommitDate: Thu Jan 21 17:31:45 2021 +0100

    tools/xenstore: add reading global state for live update
    
    Add reading the global state for live update.
    
    Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
    Acked-by: Julien Grall <jgrall@xxxxxxxxxx>
    Reviewed-by: Paul Durrant <paul@xxxxxxx>
    Acked-by: Wei Liu <wl@xxxxxxx>
---
 tools/xenstore/xenstored_control.c | 1 +
 tools/xenstore/xenstored_core.c    | 9 +++++++++
 tools/xenstore/xenstored_core.h    | 2 ++
 3 files changed, 12 insertions(+)

diff --git a/tools/xenstore/xenstored_control.c 
b/tools/xenstore/xenstored_control.c
index 3bced9e39e..d94b558e99 100644
--- a/tools/xenstore/xenstored_control.c
+++ b/tools/xenstore/xenstored_control.c
@@ -536,6 +536,7 @@ void lu_read_state(void)
             head = (void *)head + sizeof(*head) + head->length) {
                switch (head->type) {
                case XS_STATE_TYPE_GLOBAL:
+                       read_state_global(ctx, head + 1);
                        break;
                case XS_STATE_TYPE_CONN:
                        break;
diff --git a/tools/xenstore/xenstored_core.c b/tools/xenstore/xenstored_core.c
index 4d88aeba3d..60e98104ad 100644
--- a/tools/xenstore/xenstored_core.c
+++ b/tools/xenstore/xenstored_core.c
@@ -2512,6 +2512,15 @@ const char *dump_state_nodes(FILE *fp, const void *ctx)
        return dump_state_node_tree(fp, path);
 }
 
+void read_state_global(const void *ctx, const void *state)
+{
+       const struct xs_state_global *glb = state;
+
+       sock = glb->socket_fd;
+
+       domain_init(glb->evtchn_fd);
+}
+
 /*
  * Local variables:
  *  mode: C
diff --git a/tools/xenstore/xenstored_core.h b/tools/xenstore/xenstored_core.h
index c7567eaf0b..ac9fe1559e 100644
--- a/tools/xenstore/xenstored_core.h
+++ b/tools/xenstore/xenstored_core.h
@@ -265,6 +265,8 @@ const char *dump_state_node_perms(FILE *fp, struct 
xs_state_node *sn,
                                  const struct xs_permissions *perms,
                                  unsigned int n_perms);
 
+void read_state_global(const void *ctx, const void *state);
+
 #endif /* _XENSTORED_CORE_H */
 
 /*
--
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