From f94008e45a15666439766488edf84b21a86111ee Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Fri, 22 Feb 2008 16:30:13 +0100
Subject: opendb: add odb_break_oplocks() function

This send breaks to none to all level2 holders

metze
(This used to be commit bd3654500b14e4ed8d4a8bb25ff9da5035a16a8b)
---
 source4/cluster/ctdb/opendb_ctdb.c | 13 ++++++++++++-
 source4/ntvfs/common/opendb.c      |  5 +++++
 source4/ntvfs/common/opendb.h      |  1 +
 source4/ntvfs/common/opendb_tdb.c  | 40 +++++++++++++++++++++++++++++++++++++-
 4 files changed, 57 insertions(+), 2 deletions(-)

(limited to 'source4')

diff --git a/source4/cluster/ctdb/opendb_ctdb.c b/source4/cluster/ctdb/opendb_ctdb.c
index 86dc1f50f1..915b760424 100644
--- a/source4/cluster/ctdb/opendb_ctdb.c
+++ b/source4/cluster/ctdb/opendb_ctdb.c
@@ -464,6 +464,16 @@ static NTSTATUS odb_ctdb_update_oplock(struct odb_lock *lck, void *file_handle,
 	return NT_STATUS_FOOBAR;
 }
 
+static NTSTATUS odb_ctdb_break_oplocks(struct odb_lock *lck)
+{
+	/*
+	 * as this file will went away and isn't used yet,
+	 * copy the implementation from the tdb backend
+	 * --metze
+	 */
+	return NT_STATUS_FOOBAR;
+}
+
 /*
   remove a pending opendb entry
 */
@@ -642,7 +652,8 @@ static const struct opendb_ops opendb_ctdb_ops = {
 	.odb_set_delete_on_close = odb_ctdb_set_delete_on_close,
 	.odb_get_delete_on_close = odb_ctdb_get_delete_on_close,
 	.odb_can_open            = odb_ctdb_can_open,
-	.odb_update_oplock       = odb_ctdb_update_oplock
+	.odb_update_oplock       = odb_ctdb_update_oplock,
+	.odb_break_oplocks       = odb_ctdb_break_oplocks
 };
 
 
diff --git a/source4/ntvfs/common/opendb.c b/source4/ntvfs/common/opendb.c
index 4ac10806e1..3f5d7210be 100644
--- a/source4/ntvfs/common/opendb.c
+++ b/source4/ntvfs/common/opendb.c
@@ -176,3 +176,8 @@ _PUBLIC_ NTSTATUS odb_update_oplock(struct odb_lock *lck, void *file_handle,
 {
 	return ops->odb_update_oplock(lck, file_handle, oplock_level);
 }
+
+_PUBLIC_ NTSTATUS odb_break_oplocks(struct odb_lock *lck)
+{
+	return ops->odb_break_oplocks(lck);
+}
diff --git a/source4/ntvfs/common/opendb.h b/source4/ntvfs/common/opendb.h
index c34a07d6fa..c46390446c 100644
--- a/source4/ntvfs/common/opendb.h
+++ b/source4/ntvfs/common/opendb.h
@@ -43,6 +43,7 @@ struct opendb_ops {
 				 uint32_t access_mask);
 	NTSTATUS (*odb_update_oplock)(struct odb_lock *lck, void *file_handle,
 				      uint32_t oplock_level);
+	NTSTATUS (*odb_break_oplocks)(struct odb_lock *lck);
 };
 
 struct opendb_oplock_break {
diff --git a/source4/ntvfs/common/opendb_tdb.c b/source4/ntvfs/common/opendb_tdb.c
index 3d4a760e2e..dd2fb138d6 100644
--- a/source4/ntvfs/common/opendb_tdb.c
+++ b/source4/ntvfs/common/opendb_tdb.c
@@ -503,6 +503,43 @@ static NTSTATUS odb_tdb_update_oplock(struct odb_lock *lck, void *file_handle,
 	return odb_push_record(lck, &file);
 }
 
+/*
+  send oplocks breaks to none to all level2 holders
+*/
+static NTSTATUS odb_tdb_break_oplocks(struct odb_lock *lck)
+{
+	struct odb_context *odb = lck->odb;
+	NTSTATUS status;
+	struct opendb_file file;
+	int i;
+	bool modified = true;
+
+	status = odb_pull_record(lck, &file);
+	if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
+		return NT_STATUS_OK;
+	}
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	/* see if anyone has an oplock, which we need to break */
+	for (i=0;i<file.num_entries;i++) {
+		if (file.entries[i].oplock_level == OPLOCK_LEVEL_II) {
+			/*
+			 * there could be multiple level2 oplocks
+			 * and we just send a break to none to all of them
+			 * without waiting for a release
+			 */
+			odb_oplock_break_send(odb, &file.entries[i],
+					      OPLOCK_BREAK_TO_NONE);
+			file.entries[i].oplock_level = OPLOCK_NONE;
+			modified = true;
+		}
+	}
+
+	if (modified) {
+		return odb_push_record(lck, &file);
+	}
+	return NT_STATUS_OK;
+}
 
 /*
   remove a pending opendb entry
@@ -682,7 +719,8 @@ static const struct opendb_ops opendb_tdb_ops = {
 	.odb_set_delete_on_close = odb_tdb_set_delete_on_close,
 	.odb_get_delete_on_close = odb_tdb_get_delete_on_close,
 	.odb_can_open            = odb_tdb_can_open,
-	.odb_update_oplock       = odb_tdb_update_oplock
+	.odb_update_oplock       = odb_tdb_update_oplock,
+	.odb_break_oplocks       = odb_tdb_break_oplocks
 };
 
 
-- 
cgit