diff options
| -rw-r--r-- | fs/ocfs2/dlm/dlmcommon.h | 6 | ||||
| -rw-r--r-- | fs/ocfs2/dlm/dlmmaster.c | 99 |
2 files changed, 94 insertions, 11 deletions
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h index 3f55471..2f4f5d4 100644 --- a/fs/ocfs2/dlm/dlmcommon.h +++ b/fs/ocfs2/dlm/dlmcommon.h @@ -180,6 +180,11 @@ struct dlm_assert_master_priv unsigned ignore_higher:1; }; +struct dlm_deref_lockres_priv +{ + struct dlm_lock_resource *deref_res; + u8 deref_node; +}; struct dlm_work_item { @@ -191,6 +196,7 @@ struct dlm_work_item struct dlm_request_all_locks_priv ral; struct dlm_mig_lockres_priv ml; struct dlm_assert_master_priv am; + struct dlm_deref_lockres_priv dl; } u; }; diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c index 84f36db..77e4e61 100644 --- a/fs/ocfs2/dlm/dlmmaster.c +++ b/fs/ocfs2/dlm/dlmmaster.c @@ -102,6 +102,7 @@ static void dlm_assert_master_worker(struct dlm_work_item *item, void *data); static int dlm_do_assert_master(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, void *nodemap, u32 flags); +static void dlm_deref_lockres_worker(struct dlm_work_item *item, void *data); static inline int dlm_mle_equal(struct dlm_ctxt *dlm, struct dlm_master_list_entry *mle, @@ -1717,6 +1718,11 @@ int dlm_do_assert_master(struct dlm_ctxt *dlm, unsigned int namelen = res->lockname.len; BUG_ON(namelen > O2NM_MAX_NAME_LEN); + + spin_lock(&res->spinlock); + res->state |= DLM_LOCK_RES_SETREF_INPROG; + spin_unlock(&res->spinlock); + again: reassert = 0; @@ -1789,6 +1795,11 @@ again: if (reassert) goto again; + spin_lock(&res->spinlock); + res->state &= ~DLM_LOCK_RES_SETREF_INPROG; + spin_unlock(&res->spinlock); + wake_up(&res->wq); + return ret; } @@ -2296,6 +2307,9 @@ int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, int ret = -EINVAL; u8 node; unsigned int hash; + struct dlm_work_item *item; + int cleared = 0; + int dispatch = 0; if (!dlm_grab(dlm)) return 0; @@ -2326,27 +2340,90 @@ int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data, spin_unlock(&dlm->spinlock); spin_lock(&res->spinlock); - BUG_ON(res->state & DLM_LOCK_RES_DROPPING_REF); - if (test_bit(node, res->refmap)) { - ret = 0; - dlm_lockres_clear_refmap_bit(node, res); - } else { - mlog(ML_ERROR, "%s:%.*s: node %u trying to drop ref " - "but it is already dropped!\n", dlm->name, namelen, - name, node); - __dlm_print_one_lock_resource(res); + if (res->state & DLM_LOCK_RES_SETREF_INPROG) + dispatch = 1; + else { + BUG_ON(res->state & DLM_LOCK_RES_DROPPING_REF); + if (test_bit(node, res->refmap)) { + dlm_lockres_clear_refmap_bit(node, res); + cleared = 1; + } } spin_unlock(&res->spinlock); - if (!ret) - dlm_lockres_calc_usage(dlm, res); + if (!dispatch) { + if (cleared) + dlm_lockres_calc_usage(dlm, res); + else { + mlog(ML_ERROR, "%s:%.*s: node %u trying to drop ref " + "but it is already dropped!\n", dlm->name, + res->lockname.len, res->lockname.name, node); + __dlm_print_one_lock_resource(res); + } + ret = 0; + goto done; + } + + item = kzalloc(sizeof(*item), GFP_NOFS); + if (!item) { + ret = -ENOMEM; + mlog_errno(ret); + goto done; + } + + dlm_init_work_item(dlm, item, dlm_deref_lockres_worker, NULL); + item->u.dl.deref_res = res; + item->u.dl.deref_node = node; + + spin_lock(&dlm->work_lock); + list_add_tail(&item->list, &dlm->work_list); + spin_unlock(&dlm->work_lock); + + queue_work(dlm->dlm_worker, &dlm->dispatched_work); + return 0; + done: if (res) dlm_lockres_put(res); dlm_put(dlm); + return ret; } +static void dlm_deref_lockres_worker(struct dlm_work_item *item, void *data) +{ + struct dlm_ctxt *dlm; + struct dlm_lock_resource *res; + u8 node; + u8 cleared = 0; + + dlm = item->dlm; + res = item->u.dl.deref_res; + node = item->u.dl.deref_node; + + spin_lock(&res->spinlock); + BUG_ON(res->state & DLM_LOCK_RES_DROPPING_REF); + if (test_bit(node, res->refmap)) { + __dlm_wait_on_lockres_flags(res, DLM_LOCK_RES_SETREF_INPROG); + dlm_lockres_clear_refmap_bit(node, res); + cleared = 1; + } + spin_unlock(&res->spinlock); + + if (cleared) { + mlog(0, "%s:%.*s node %u ref dropped in dispatch\n", + dlm->name, res->lockname.len, res->lockname.name, node); + dlm_lockres_calc_usage(dlm, res); + } else { + mlog(ML_ERROR, "%s:%.*s: node %u trying to drop ref " + "but it is already dropped!\n", dlm->name, + res->lockname.len, res->lockname.name, node); + __dlm_print_one_lock_resource(res); + } + + dlm_lockres_put(res); +} + /* * DLM_MIGRATE_LOCKRES |