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/******************************************************************************
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* *
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* * Copyright ( C ) 2005 - 2007 Red Hat , Inc . All rights reserved .
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* *
* * This copyrighted material is made available to anyone wishing to use ,
* * modify , copy , or redistribute it subject to the terms and conditions
* * of the GNU General Public License v .2 .
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# ifndef __LOCK_DOT_H__
# define __LOCK_DOT_H__
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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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void dlm_receive_message_saved ( struct dlm_ls * ls , struct dlm_message * ms ,
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 ) ;
void dlm_put_rsb ( struct dlm_rsb * r ) ;
void dlm_hold_rsb ( struct dlm_rsb * r ) ;
int dlm_put_lkb ( struct dlm_lkb * lkb ) ;
void dlm_scan_rsbs ( struct dlm_ls * ls ) ;
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int dlm_lock_recovery_try ( struct dlm_ls * ls ) ;
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 ) ;
void dlm_adjust_timeouts ( struct dlm_ls * ls ) ;
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int dlm_search_rsb_tree ( struct rb_root * tree , char * name , int len ,
unsigned int flags , struct dlm_rsb * * r_ret ) ;
dlm: fixes for nodir mode
The "nodir" mode (statically assign master nodes instead
of using the resource directory) has always been highly
experimental, and never seriously used. This commit
fixes a number of problems, making nodir much more usable.
- Major change to recovery: recover all locks and restart
all in-progress operations after recovery. In some
cases it's not possible to know which in-progess locks
to recover, so recover all. (Most require recovery
in nodir mode anyway since rehashing changes most
master nodes.)
- Change the way nodir mode is enabled, from a command
line mount arg passed through gfs2, into a sysfs
file managed by dlm_controld, consistent with the
other config settings.
- Allow recovering MSTCPY locks on an rsb that has not
yet been turned into a master copy.
- Ignore RCOM_LOCK and RCOM_LOCK_REPLY recovery messages
from a previous, aborted recovery cycle. Base this
on the local recovery status not being in the state
where any nodes should be sending LOCK messages for the
current recovery cycle.
- Hold rsb lock around dlm_purge_mstcpy_locks() because it
may run concurrently with dlm_recover_master_copy().
- Maintain highbast on process-copy lkb's (in addition to
the master as is usual), because the lkb can switch
back and forth between being a master and being a
process copy as the master node changes in recovery.
- When recovering MSTCPY locks, flag rsb's that have
non-empty convert or waiting queues for granting
at the end of recovery. (Rename flag from LOCKS_PURGED
to RECOVER_GRANT and similar for the recovery function,
because it's not only resources with purged locks
that need grant a grant attempt.)
- Replace a couple of unnecessary assertion panics with
error messages.
Signed-off-by: David Teigland <teigland@redhat.com>
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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 ) ;
dlm: fixes for nodir mode
The "nodir" mode (statically assign master nodes instead
of using the resource directory) has always been highly
experimental, and never seriously used. This commit
fixes a number of problems, making nodir much more usable.
- Major change to recovery: recover all locks and restart
all in-progress operations after recovery. In some
cases it's not possible to know which in-progess locks
to recover, so recover all. (Most require recovery
in nodir mode anyway since rehashing changes most
master nodes.)
- Change the way nodir mode is enabled, from a command
line mount arg passed through gfs2, into a sysfs
file managed by dlm_controld, consistent with the
other config settings.
- Allow recovering MSTCPY locks on an rsb that has not
yet been turned into a master copy.
- Ignore RCOM_LOCK and RCOM_LOCK_REPLY recovery messages
from a previous, aborted recovery cycle. Base this
on the local recovery status not being in the state
where any nodes should be sending LOCK messages for the
current recovery cycle.
- Hold rsb lock around dlm_purge_mstcpy_locks() because it
may run concurrently with dlm_recover_master_copy().
- Maintain highbast on process-copy lkb's (in addition to
the master as is usual), because the lkb can switch
back and forth between being a master and being a
process copy as the master node changes in recovery.
- When recovering MSTCPY locks, flag rsb's that have
non-empty convert or waiting queues for granting
at the end of recovery. (Rename flag from LOCKS_PURGED
to RECOVER_GRANT and similar for the recovery function,
because it's not only resources with purged locks
that need grant a grant attempt.)
- Replace a couple of unnecessary assertion panics with
error messages.
Signed-off-by: David Teigland <teigland@redhat.com>
2012-04-27 00:54:29 +04:00
void dlm_recover_grant ( struct dlm_ls * ls ) ;
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int dlm_recover_waiters_post ( struct dlm_ls * ls ) ;
void dlm_recover_waiters_pre ( struct dlm_ls * ls ) ;
int dlm_recover_master_copy ( struct dlm_ls * ls , struct dlm_rcom * rc ) ;
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 ,
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 ,
unsigned long timeout_cs ) ;
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int dlm_user_unlock ( struct dlm_ls * ls , struct dlm_user_args * ua_tmp ,
uint32_t flags , uint32_t lkid , char * lvb_in ) ;
int dlm_user_cancel ( struct dlm_ls * ls , struct dlm_user_args * ua_tmp ,
uint32_t flags , uint32_t lkid ) ;
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int dlm_user_purge ( struct dlm_ls * ls , struct dlm_user_proc * proc ,
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 )
{
return ! r - > res_nodeid ;
}
static inline void lock_rsb ( struct dlm_rsb * r )
{
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mutex_lock ( & r - > res_mutex ) ;
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}
static inline void unlock_rsb ( struct dlm_rsb * r )
{
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mutex_unlock ( & r - > res_mutex ) ;
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}
# endif
