s3 oplocks: Add capabilites flags field to the kernel_oplocks struct

Here is a short description for each of the new capability flags:

KOPLOCKS_LEVEL2_SUPPORTED: Level 2 oplocks are supported natively in
the kernel.

KOPLOCKS_DEFERRED_OPEN_NOTIFICATION: The kernel notifies deferred
openers when they can retry the open.

KOPLOCKS_TIMEOUT_NOTIFICATION: The kernel notifies smbds when an
oplock break times out.

KOPLOCKS_OPLOCK_BROKEN_NOTIFICATION: The kernel notifies smbds when an
oplock is broken.

2 files changed, 18 insertions, 0 deletions

diff --git a/source3/include/proto.h b/source3/include/proto.h
index ceea97bf56..f553f7625e 100644
--- a/source3/include/proto.h
+++ b/source3/include/proto.h
@@ -6898,6 +6898,7 @@ bool set_file_oplock(files_struct *fsp, int oplock_type);
 void release_file_oplock(files_struct *fsp);
 bool remove_oplock(files_struct *fsp);
 bool downgrade_oplock(files_struct *fsp);
+bool should_notify_deferred_opens(void);
 void reply_to_oplock_break_requests(files_struct *fsp);
 void process_oplock_async_level2_break_message(struct messaging_context *msg_ctx,
 						      void *private_data,
diff --git a/source3/include/smb.h b/source3/include/smb.h
index 557489f211..bef0fd177b 100644
--- a/source3/include/smb.h
+++ b/source3/include/smb.h
@@ -1689,9 +1689,26 @@ enum smbd_capability {
     LEASE_CAPABILITY
 };
 
+/*
+ * Kernel oplocks capability flags.
+ */
+
+/* Level 2 oplocks are supported natively by kernel oplocks. */
+#define KOPLOCKS_LEVEL2_SUPPORTED		0x1
+
+/* The kernel notifies deferred openers when they can retry the open. */
+#define KOPLOCKS_DEFERRED_OPEN_NOTIFICATION	0x2
+
+/* The kernel notifies smbds when an oplock break times out. */
+#define KOPLOCKS_TIMEOUT_NOTIFICATION		0x4
+
+/* The kernel notifies smbds when an oplock is broken. */
+#define KOPLOCKS_OPLOCK_BROKEN_NOTIFICATION	0x8
+
 struct kernel_oplocks_ops;
 struct kernel_oplocks {
 	const struct kernel_oplocks_ops *ops;
+	uint32_t flags;
 	void *private_data;
 };