e3dad42bf9
Define the ocfs2_stack_operations structure. Build o2cb_stack_ops from all of the o2cb-specific stack functions. Change the generic stack glue functions to call the stack_ops instead of the o2cb functions directly. The o2cb functions are moved to stack_o2cb.c. The headers are cleaned up to where only needed headers are included. In this code, stackglue.c and stack_o2cb.c refer to some shared extern variables. When they become modules, that will change. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
163 lines
3.5 KiB
C
163 lines
3.5 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 <linux/slab.h>
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#include <linux/kmod.h>
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/* Needed for AOP_TRUNCATED_PAGE in mlog_errno() */
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#include <linux/fs.h>
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#include "cluster/masklog.h"
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#include "stackglue.h"
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struct ocfs2_locking_protocol *stack_glue_lproto;
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int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
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int mode,
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union ocfs2_dlm_lksb *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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BUG_ON(stack_glue_lproto == NULL);
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return o2cb_stack_ops.dlm_lock(conn, mode, lksb, flags,
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name, namelen, astarg);
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}
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int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
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union ocfs2_dlm_lksb *lksb,
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u32 flags,
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void *astarg)
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{
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BUG_ON(stack_glue_lproto == NULL);
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return o2cb_stack_ops.dlm_unlock(conn, lksb, flags, astarg);
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}
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int ocfs2_dlm_lock_status(union ocfs2_dlm_lksb *lksb)
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{
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return o2cb_stack_ops.lock_status(lksb);
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}
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/*
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* Why don't we cast to ocfs2_meta_lvb? The "clean" answer is that we
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* don't cast at the glue level. The real answer is that the header
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* ordering is nigh impossible.
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*/
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void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb)
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{
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return o2cb_stack_ops.lock_lvb(lksb);
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}
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void ocfs2_dlm_dump_lksb(union ocfs2_dlm_lksb *lksb)
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{
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o2cb_stack_ops.dump_lksb(lksb);
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}
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int ocfs2_cluster_connect(const char *group,
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int grouplen,
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void (*recovery_handler)(int node_num,
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void *recovery_data),
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void *recovery_data,
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struct ocfs2_cluster_connection **conn)
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{
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int rc = 0;
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struct ocfs2_cluster_connection *new_conn;
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BUG_ON(group == NULL);
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BUG_ON(conn == NULL);
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BUG_ON(recovery_handler == NULL);
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if (grouplen > GROUP_NAME_MAX) {
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rc = -EINVAL;
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goto out;
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}
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new_conn = kzalloc(sizeof(struct ocfs2_cluster_connection),
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GFP_KERNEL);
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if (!new_conn) {
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rc = -ENOMEM;
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goto out;
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}
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memcpy(new_conn->cc_name, group, grouplen);
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new_conn->cc_namelen = grouplen;
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new_conn->cc_recovery_handler = recovery_handler;
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new_conn->cc_recovery_data = recovery_data;
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/* Start the new connection at our maximum compatibility level */
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new_conn->cc_version = stack_glue_lproto->lp_max_version;
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rc = o2cb_stack_ops.connect(new_conn);
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if (rc) {
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mlog_errno(rc);
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goto out_free;
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}
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*conn = new_conn;
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out_free:
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if (rc)
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kfree(new_conn);
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out:
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return rc;
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}
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int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn)
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{
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int ret;
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BUG_ON(conn == NULL);
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ret = o2cb_stack_ops.disconnect(conn);
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/* XXX Should we free it anyway? */
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if (!ret)
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kfree(conn);
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return ret;
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}
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void ocfs2_cluster_hangup(const char *group, int grouplen)
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{
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BUG_ON(group == NULL);
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BUG_ON(group[grouplen] != '\0');
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o2cb_stack_ops.hangup(group, grouplen);
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}
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int ocfs2_cluster_this_node(unsigned int *node)
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{
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return o2cb_stack_ops.this_node(node);
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}
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void ocfs2_stack_glue_set_locking_protocol(struct ocfs2_locking_protocol *proto)
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{
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BUG_ON(proto != NULL);
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stack_glue_lproto = proto;
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}
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