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authorSeongJae Park <sjpark@amazon.de>2020-12-14 10:04:18 +0100
committerJuergen Gross <jgross@suse.com>2020-12-14 10:04:18 +0100
commit2e85d32b1c865bec703ce0c962221a5e955c52c2 (patch)
tree9d0cce59ed6d8225cf99404797fea942270a061c /include/xen/xenbus.h
parentxen/xenbus: Allow watches discard events before queueing (diff)
downloadlinux-2e85d32b1c865bec703ce0c962221a5e955c52c2.tar.xz
linux-2e85d32b1c865bec703ce0c962221a5e955c52c2.zip
xen/xenbus: Add 'will_handle' callback support in xenbus_watch_path()
Some code does not directly make 'xenbus_watch' object and call 'register_xenbus_watch()' but use 'xenbus_watch_path()' instead. This commit adds support of 'will_handle' callback in the 'xenbus_watch_path()' and it's wrapper, 'xenbus_watch_pathfmt()'. This is part of XSA-349 Cc: stable@vger.kernel.org Signed-off-by: SeongJae Park <sjpark@amazon.de> Reported-by: Michael Kurth <mku@amazon.de> Reported-by: Pawel Wieczorkiewicz <wipawel@amazon.de> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'include/xen/xenbus.h')
-rw-r--r--include/xen/xenbus.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/xen/xenbus.h b/include/xen/xenbus.h
index baa88bf0b9bc..c8574d1b814c 100644
--- a/include/xen/xenbus.h
+++ b/include/xen/xenbus.h
@@ -204,10 +204,14 @@ 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, ...);