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08bf1fea79
Using the new interval tree code we add a tree for each lock status list to efficiently track ranged requests. Internally, most operations on a resources lock status list (granted, waiting, converting) then are turned into operations within a given range. There is no API change other than a new call, dlm_lock_range() and a new structure, 'struct dlm_key' to define our range endpoints. Keys can have arbitrary lengths and are compared via memcmp. A ranged blocking ast type is defined so that users of dlm_lock_range() can know which range they are blocking. A rudimentary test, dlmtest.ko is included. TODO: - Update userspace entry points, need to add one for new lock call - Manage backwards compatibility with network protocol Signed-off-by: Mark Fasheh <mfasheh@versity.com>
99 lines
2.0 KiB
C
99 lines
2.0 KiB
C
/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#include "dlm_internal.h"
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#include "lockspace.h"
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#include "lock.h"
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#include "user.h"
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#include "memory.h"
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#include "config.h"
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#include "lowcomms.h"
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static int __init init_dlm(void)
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{
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int error;
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error = dlm_memory_init();
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if (error)
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goto out;
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error = dlm_lockspace_init();
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if (error)
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goto out_mem;
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error = dlm_config_init();
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if (error)
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goto out_lockspace;
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error = dlm_register_debugfs();
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if (error)
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goto out_config;
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error = dlm_user_init();
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if (error)
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goto out_debug;
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error = dlm_netlink_init();
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if (error)
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goto out_user;
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error = dlm_plock_init();
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if (error)
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goto out_netlink;
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printk("DLM installed\n");
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return 0;
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out_netlink:
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dlm_netlink_exit();
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out_user:
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dlm_user_exit();
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out_debug:
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dlm_unregister_debugfs();
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out_config:
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dlm_config_exit();
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out_lockspace:
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dlm_lockspace_exit();
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out_mem:
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dlm_memory_exit();
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out:
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return error;
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}
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static void __exit exit_dlm(void)
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{
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dlm_plock_exit();
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dlm_netlink_exit();
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dlm_user_exit();
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dlm_config_exit();
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dlm_memory_exit();
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dlm_lockspace_exit();
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dlm_lowcomms_exit();
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dlm_unregister_debugfs();
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}
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module_init(init_dlm);
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module_exit(exit_dlm);
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MODULE_DESCRIPTION("Distributed Lock Manager");
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MODULE_AUTHOR("Red Hat, Inc.");
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MODULE_LICENSE("GPL");
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EXPORT_SYMBOL_GPL(dlm_new_lockspace);
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EXPORT_SYMBOL_GPL(dlm_release_lockspace);
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EXPORT_SYMBOL_GPL(dlm_lock);
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EXPORT_SYMBOL_GPL(dlm_unlock);
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EXPORT_SYMBOL_GPL(dlm_lock_range);
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