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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>
83 lines
3.1 KiB
C
83 lines
3.1 KiB
C
/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) 2005-2007 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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#ifndef __LOCK_DOT_H__
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#define __LOCK_DOT_H__
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void dlm_dump_rsb(struct dlm_rsb *r);
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void dlm_dump_rsb_name(struct dlm_ls *ls, char *name, int len);
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void dlm_print_lkb(struct dlm_lkb *lkb);
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void dlm_receive_message_saved(struct dlm_ls *ls, struct dlm_message *ms,
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uint32_t saved_seq);
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void dlm_receive_buffer(union dlm_packet *p, int nodeid);
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int dlm_modes_compat(int mode1, int mode2);
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void dlm_put_rsb(struct dlm_rsb *r);
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void dlm_hold_rsb(struct dlm_rsb *r);
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int dlm_put_lkb(struct dlm_lkb *lkb);
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void dlm_scan_rsbs(struct dlm_ls *ls);
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int dlm_lock_recovery_try(struct dlm_ls *ls);
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void dlm_unlock_recovery(struct dlm_ls *ls);
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void dlm_scan_waiters(struct dlm_ls *ls);
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void dlm_scan_timeout(struct dlm_ls *ls);
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void dlm_adjust_timeouts(struct dlm_ls *ls);
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int dlm_master_lookup(struct dlm_ls *ls, int nodeid, char *name, int len,
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unsigned int flags, int *r_nodeid, int *result);
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int dlm_search_rsb_tree(struct rb_root *tree, char *name, int len,
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struct dlm_rsb **r_ret);
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void dlm_recover_purge(struct dlm_ls *ls);
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void dlm_purge_mstcpy_locks(struct dlm_rsb *r);
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void dlm_recover_grant(struct dlm_ls *ls);
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int dlm_recover_waiters_post(struct dlm_ls *ls);
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void dlm_recover_waiters_pre(struct dlm_ls *ls);
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int dlm_recover_master_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
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int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
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int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, int mode,
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uint32_t flags, void *name, unsigned int namelen,
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unsigned long timeout_cs);
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int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
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int mode, uint32_t flags, uint32_t lkid, char *lvb_in,
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unsigned long timeout_cs);
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int dlm_user_adopt_orphan(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
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int mode, uint32_t flags, void *name, unsigned int namelen,
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unsigned long timeout_cs, uint32_t *lkid);
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int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
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uint32_t flags, uint32_t lkid, char *lvb_in);
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int dlm_user_cancel(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
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uint32_t flags, uint32_t lkid);
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int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
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int nodeid, int pid);
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int dlm_user_deadlock(struct dlm_ls *ls, uint32_t flags, uint32_t lkid);
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void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc);
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static inline int is_master(struct dlm_rsb *r)
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{
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return !r->res_nodeid;
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}
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static inline void lock_rsb(struct dlm_rsb *r)
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{
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mutex_lock(&r->res_mutex);
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}
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static inline void unlock_rsb(struct dlm_rsb *r)
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{
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mutex_unlock(&r->res_mutex);
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}
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int ranges_overlap(struct dlm_range *range1, struct dlm_range *range2);
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#endif
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