| /****************************************************************************** |
| ******************************************************************************* |
| ** |
| ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| ** Copyright (C) 2004-2008 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 |
| * -ENOMEM if there is no memory to process request |
| * -EINVAL if there are invalid parameters |
| * -DLM_EUNLOCK if unlock request was successful |
| * -DLM_ECANCEL if a cancel completed successfully |
| */ |
| |
| #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_NODIR 0x00000001 |
| #define DLM_LSFL_TIMEWARN 0x00000002 |
| #define DLM_LSFL_FS 0x00000004 |
| #define DLM_LSFL_NEWEXCL 0x00000008 |
| |
| |
| #endif /* __DLM_DOT_H__ */ |
| |