cpp-d1064d

[cross.git] / i686-linux-gnu-4.7 / usr / include / linux / dlm.h

diff --git a/i686-linux-gnu-4.7/usr/include/linux/dlm.h b/i686-linux-gnu-4.7/usr/include/linux/dlm.h
new file mode 100644 (file)
index 0000000..546318c
--- /dev/null
+++ b/i686-linux-gnu-4.7/usr/include/linux/dlm.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/******************************************************************************
+*******************************************************************************
+**
+**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
+**  Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
+**
+**  This copyrighted material is made available to anyone wishing to use,
+**  modify, copy, or redistribute it subject to the terms and conditions
+**  of the GNU General Public License v.2.
+**
+*******************************************************************************
+******************************************************************************/
+
+#ifndef __DLM_DOT_H__
+#define __DLM_DOT_H__
+
+/*
+ * Interface to Distributed Lock Manager (DLM)
+ * routines and structures to use DLM lockspaces
+ */
+
+/* Lock levels and flags are here */
+#include <linux/dlmconstants.h>
+#include <linux/types.h>
+
+typedef void dlm_lockspace_t;
+
+/*
+ * Lock status block
+ *
+ * Use this structure to specify the contents of the lock value block.  For a
+ * conversion request, this structure is used to specify the lock ID of the
+ * lock.  DLM writes the status of the lock request and the lock ID assigned
+ * to the request in the lock status block.
+ *
+ * sb_lkid: the returned lock ID.  It is set on new (non-conversion) requests.
+ * It is available when dlm_lock returns.
+ *
+ * sb_lvbptr: saves or returns the contents of the lock's LVB according to rules
+ * shown for the DLM_LKF_VALBLK flag.
+ *
+ * sb_flags: DLM_SBF_DEMOTED is returned if in the process of promoting a lock,
+ * it was first demoted to NL to avoid conversion deadlock.
+ * DLM_SBF_VALNOTVALID is returned if the resource's LVB is marked invalid.
+ *
+ * sb_status: the returned status of the lock request set prior to AST
+ * execution.  Possible return values:
+ *
+ * 0 if lock request was successful
+ * -EAGAIN if request would block and is flagged DLM_LKF_NOQUEUE
+ * -DLM_EUNLOCK if unlock request was successful
+ * -DLM_ECANCEL if a cancel completed successfully
+ * -EDEADLK if a deadlock was detected
+ * -ETIMEDOUT if the lock request was canceled due to a timeout
+ */
+
+#define DLM_SBF_DEMOTED                0x01
+#define DLM_SBF_VALNOTVALID    0x02
+#define DLM_SBF_ALTMODE                0x04
+
+struct dlm_lksb {
+       int      sb_status;
+       __u32    sb_lkid;
+       char     sb_flags;
+       char *   sb_lvbptr;
+};
+
+/* dlm_new_lockspace() flags */
+
+#define DLM_LSFL_TIMEWARN      0x00000002
+#define DLM_LSFL_FS            0x00000004
+#define DLM_LSFL_NEWEXCL       0x00000008
+
+
+#endif /* __DLM_DOT_H__ */