diff options
Diffstat (limited to 'include/xen/xenbus.h')
| -rw-r--r-- | include/xen/xenbus.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/include/xen/xenbus.h b/include/xen/xenbus.h index 869c816d5f8c..14d47ed4114f 100644 --- a/include/xen/xenbus.h +++ b/include/xen/xenbus.h @@ -59,6 +59,15 @@ struct xenbus_watch /* Path being watched. */ const char *node; + unsigned int nr_pending; + + /* + * Called just before enqueing new event while a spinlock is held. + * The event will be discarded if this callback returns false. + */ + bool (*will_handle)(struct xenbus_watch *, + const char *path, const char *token); + /* Callback (executed in a process context with no locks held). */ void (*callback)(struct xenbus_watch *, const char *path, const char *token); @@ -178,8 +187,6 @@ void xs_suspend_cancel(void); struct work_struct; -void xenbus_probe(struct work_struct *); - #define XENBUS_IS_ERR_READ(str) ({ \ if (!IS_ERR(str) && strlen(str) == 0) { \ kfree(str); \ @@ -192,10 +199,14 @@ void xenbus_probe(struct work_struct *); int xenbus_watch_path(struct xenbus_device *dev, const char *path, struct xenbus_watch *watch, + bool (*will_handle)(struct xenbus_watch *, + const char *, const char *), void (*callback)(struct xenbus_watch *, const char *, const char *)); -__printf(4, 5) +__printf(5, 6) int xenbus_watch_pathfmt(struct xenbus_device *dev, struct xenbus_watch *watch, + bool (*will_handle)(struct xenbus_watch *, + const char *, const char *), void (*callback)(struct xenbus_watch *, const char *, const char *), const char *pathfmt, ...); |