3ae1acf93a
New features: lock timeouts and time warnings. If the DLM_LKF_TIMEOUT flag is set, then the request/conversion will be canceled after waiting the specified number of centiseconds (specified per lock). This feature is only available for locks requested through libdlm (can be enabled for kernel dlm users if there's a use for it.) If the new DLM_LSFL_TIMEWARN flag is set when creating the lockspace, then a warning message will be sent to userspace (using genetlink) after a request/conversion has been waiting for a given number of centiseconds (configurable per node). The time warnings will be used in the future to do deadlock detection in userspace. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
69 lines
2.5 KiB
C
69 lines
2.5 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_print_rsb(struct dlm_rsb *r);
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void dlm_dump_rsb(struct dlm_rsb *r);
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void dlm_print_lkb(struct dlm_lkb *lkb);
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int dlm_receive_message(struct dlm_header *hd, int nodeid, int recovery);
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int dlm_modes_compat(int mode1, int mode2);
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int dlm_find_rsb(struct dlm_ls *ls, char *name, int namelen,
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unsigned int flags, struct dlm_rsb **r_ret);
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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_timeout(struct dlm_ls *ls);
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void dlm_adjust_timeouts(struct dlm_ls *ls);
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int dlm_purge_locks(struct dlm_ls *ls);
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void dlm_purge_mstcpy_locks(struct dlm_rsb *r);
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void dlm_grant_after_purge(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, uint32_t parent_lkid);
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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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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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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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#endif
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