diff options
| -rw-r--r-- | drivers/xen/xenbus/xenbus_xs.c | 20 | ||||
| -rw-r--r-- | include/xen/interface/io/xs_wire.h | 3 |
2 files changed, 22 insertions, 1 deletions
diff --git a/drivers/xen/xenbus/xenbus_xs.c b/drivers/xen/xenbus/xenbus_xs.c index d1c217b23a4..bce15cf4a8d 100644 --- a/drivers/xen/xenbus/xenbus_xs.c +++ b/drivers/xen/xenbus/xenbus_xs.c @@ -618,6 +618,23 @@ static struct xenbus_watch *find_watch(const char *token) return NULL; } +static void xs_reset_watches(void) +{ + int err, supported = 0; + + if (!xen_hvm_domain()) + return; + + err = xenbus_scanf(XBT_NIL, "control", + "platform-feature-xs_reset_watches", "%d", &supported); + if (err != 1 || !supported) + return; + + err = xs_error(xs_single(XBT_NIL, XS_RESET_WATCHES, "", NULL)); + if (err && err != -EEXIST) + printk(KERN_WARNING "xs_reset_watches failed: %d\n", err); +} + /* Register callback to watch this node. */ int register_xenbus_watch(struct xenbus_watch *watch) { @@ -900,5 +917,8 @@ int xs_init(void) if (IS_ERR(task)) return PTR_ERR(task); + /* shutdown watches for kexec boot */ + xs_reset_watches(); + return 0; } diff --git a/include/xen/interface/io/xs_wire.h b/include/xen/interface/io/xs_wire.h index 7cdfca24eaf..794deb07eb5 100644 --- a/include/xen/interface/io/xs_wire.h +++ b/include/xen/interface/io/xs_wire.h @@ -29,7 +29,8 @@ enum xsd_sockmsg_type XS_IS_DOMAIN_INTRODUCED, XS_RESUME, XS_SET_TARGET, - XS_RESTRICT + XS_RESTRICT, + XS_RESET_WATCHES, }; #define XS_WRITE_NONE "NONE" |