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authorDavid Teigland <teigland@redhat.com>2012-04-26 15:54:29 -0500
committerDavid Teigland <teigland@redhat.com>2012-05-02 14:15:27 -0500
commit4875647a08e35f77274838d97ca8fa44158d50e2 (patch)
treebf8a39eaf3219af5d661ed3e347545306fd84bda /fs/dlm/lock.h
parent6d40c4a708e0e996fd9c60d4093aebba5fe1f749 (diff)
downloadop-kernel-dev-4875647a08e35f77274838d97ca8fa44158d50e2.zip
op-kernel-dev-4875647a08e35f77274838d97ca8fa44158d50e2.tar.gz
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>
Diffstat (limited to 'fs/dlm/lock.h')
-rw-r--r--fs/dlm/lock.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/dlm/lock.h b/fs/dlm/lock.h
index 56e2bc6..c8b226c 100644
--- a/fs/dlm/lock.h
+++ b/fs/dlm/lock.h
@@ -32,9 +32,9 @@ void dlm_adjust_timeouts(struct dlm_ls *ls);
int dlm_search_rsb_tree(struct rb_root *tree, char *name, int len,
unsigned int flags, struct dlm_rsb **r_ret);
-int dlm_purge_locks(struct dlm_ls *ls);
+void dlm_recover_purge(struct dlm_ls *ls);
void dlm_purge_mstcpy_locks(struct dlm_rsb *r);
-void dlm_grant_after_purge(struct dlm_ls *ls);
+void dlm_recover_grant(struct dlm_ls *ls);
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);
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