bd3e76105d
The ocfs2 generic code should use the values in <linux/dlmconstants.h>. stackglue.c will convert them to o2dlm values. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
122 lines
2.8 KiB
C
122 lines
2.8 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* stackglue.c
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*
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* Code which implements an OCFS2 specific interface to underlying
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* cluster stacks.
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*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include "stackglue.h"
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static struct ocfs2_locking_protocol *lproto;
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/* These should be identical */
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#if (DLM_LOCK_IV != LKM_IVMODE)
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# error Lock modes do not match
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#endif
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#if (DLM_LOCK_NL != LKM_NLMODE)
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# error Lock modes do not match
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#endif
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#if (DLM_LOCK_CR != LKM_CRMODE)
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# error Lock modes do not match
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#endif
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#if (DLM_LOCK_CW != LKM_CWMODE)
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# error Lock modes do not match
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#endif
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#if (DLM_LOCK_PR != LKM_PRMODE)
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# error Lock modes do not match
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#endif
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#if (DLM_LOCK_PW != LKM_PWMODE)
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# error Lock modes do not match
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#endif
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#if (DLM_LOCK_EX != LKM_EXMODE)
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# error Lock modes do not match
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#endif
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static inline int mode_to_o2dlm(int mode)
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{
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BUG_ON(mode > LKM_MAXMODE);
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return mode;
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}
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#define map_flag(_generic, _o2dlm) \
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if (flags & (_generic)) { \
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flags &= ~(_generic); \
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o2dlm_flags |= (_o2dlm); \
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}
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static int flags_to_o2dlm(u32 flags)
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{
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int o2dlm_flags = 0;
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map_flag(DLM_LKF_NOQUEUE, LKM_NOQUEUE);
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map_flag(DLM_LKF_CANCEL, LKM_CANCEL);
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map_flag(DLM_LKF_CONVERT, LKM_CONVERT);
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map_flag(DLM_LKF_VALBLK, LKM_VALBLK);
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map_flag(DLM_LKF_IVVALBLK, LKM_INVVALBLK);
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map_flag(DLM_LKF_ORPHAN, LKM_ORPHAN);
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map_flag(DLM_LKF_FORCEUNLOCK, LKM_FORCE);
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map_flag(DLM_LKF_TIMEOUT, LKM_TIMEOUT);
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map_flag(DLM_LKF_LOCAL, LKM_LOCAL);
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/* map_flag() should have cleared every flag passed in */
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BUG_ON(flags != 0);
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return o2dlm_flags;
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}
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#undef map_flag
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enum dlm_status ocfs2_dlm_lock(struct dlm_ctxt *dlm,
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int mode,
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struct dlm_lockstatus *lksb,
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u32 flags,
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void *name,
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unsigned int namelen,
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void *astarg)
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{
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int o2dlm_mode = mode_to_o2dlm(mode);
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int o2dlm_flags = flags_to_o2dlm(flags);
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BUG_ON(lproto == NULL);
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return dlmlock(dlm, o2dlm_mode, lksb, o2dlm_flags, name, namelen,
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lproto->lp_lock_ast, astarg,
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lproto->lp_blocking_ast);
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}
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enum dlm_status ocfs2_dlm_unlock(struct dlm_ctxt *dlm,
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struct dlm_lockstatus *lksb,
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u32 flags,
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void *astarg)
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{
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int o2dlm_flags = flags_to_o2dlm(flags);
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BUG_ON(lproto == NULL);
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return dlmunlock(dlm, lksb, o2dlm_flags,
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lproto->lp_unlock_ast, astarg);
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}
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void o2cb_get_stack(struct ocfs2_locking_protocol *proto)
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{
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BUG_ON(proto == NULL);
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lproto = proto;
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}
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void o2cb_put_stack(void)
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{
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lproto = NULL;
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}
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