VFS: Export dquot_send_warning

Sending a message to userspace in a generic format to warn
of events (e.g. quota exceeded) in the quota subsystem is
a generically useful feature. This patch makes some minor
changes to the send_message function from dquot.c renaming
it quota_send_message, moving it to quota.c and exporting it
for use by filesystems which do not use the dquot code.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/quota.h b/include/linux/quota.h
index 78c48895b12a..ce9a9b2e5cd4 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -376,6 +376,17 @@ static inline unsigned int dquot_generic_flag(unsigned int flags, int type)
         return flags >> _DQUOT_STATE_FLAGS;
 }
 
+#ifdef CONFIG_QUOTA_NETLINK_INTERFACE
+extern void quota_send_warning(short type, unsigned int id, dev_t dev,
+                               const char warntype);
+#else
+static inline void quota_send_warning(short type, unsigned int id, dev_t dev,
+                                      const char warntype)
+{
+        return;
+}
+#endif /* CONFIG_QUOTA_NETLINK_INTERFACE */
+
 struct quota_info {
         unsigned int flags;                     /* Flags for diskquotas on this device */
         struct mutex dqio_mutex;                /* lock device while I/O in progress */