diff options
Diffstat (limited to 'fs/ocfs2/cluster')
| -rw-r--r-- | fs/ocfs2/cluster/heartbeat.c | 96 | ||||
| -rw-r--r-- | fs/ocfs2/cluster/heartbeat.h | 6 | ||||
| -rw-r--r-- | fs/ocfs2/cluster/masklog.c | 1 | ||||
| -rw-r--r-- | fs/ocfs2/cluster/nodemanager.c | 42 | ||||
| -rw-r--r-- | fs/ocfs2/cluster/nodemanager.h | 5 | ||||
| -rw-r--r-- | fs/ocfs2/cluster/tcp.c | 21 |
6 files changed, 151 insertions, 20 deletions
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c index 979113479c6..2bd7f788cf3 100644 --- a/fs/ocfs2/cluster/heartbeat.c +++ b/fs/ocfs2/cluster/heartbeat.c @@ -1335,6 +1335,7 @@ static ssize_t o2hb_region_dev_write(struct o2hb_region *reg, ret = wait_event_interruptible(o2hb_steady_queue, atomic_read(®->hr_steady_iterations) == 0); if (ret) { + /* We got interrupted (hello ptrace!). Clean up */ spin_lock(&o2hb_live_lock); hb_task = reg->hr_task; reg->hr_task = NULL; @@ -1345,7 +1346,16 @@ static ssize_t o2hb_region_dev_write(struct o2hb_region *reg, goto out; } - ret = count; + /* Ok, we were woken. Make sure it wasn't by drop_item() */ + spin_lock(&o2hb_live_lock); + hb_task = reg->hr_task; + spin_unlock(&o2hb_live_lock); + + if (hb_task) + ret = count; + else + ret = -EIO; + out: if (filp) fput(filp); @@ -1523,6 +1533,15 @@ static void o2hb_heartbeat_group_drop_item(struct config_group *group, if (hb_task) kthread_stop(hb_task); + /* + * If we're racing a dev_write(), we need to wake them. They will + * check reg->hr_task + */ + if (atomic_read(®->hr_steady_iterations) != 0) { + atomic_set(®->hr_steady_iterations, 0); + wake_up(&o2hb_steady_queue); + } + config_item_put(item); } @@ -1665,7 +1684,67 @@ void o2hb_setup_callback(struct o2hb_callback_func *hc, } EXPORT_SYMBOL_GPL(o2hb_setup_callback); -int o2hb_register_callback(struct o2hb_callback_func *hc) +static struct o2hb_region *o2hb_find_region(const char *region_uuid) +{ + struct o2hb_region *p, *reg = NULL; + + assert_spin_locked(&o2hb_live_lock); + + list_for_each_entry(p, &o2hb_all_regions, hr_all_item) { + if (!strcmp(region_uuid, config_item_name(&p->hr_item))) { + reg = p; + break; + } + } + + return reg; +} + +static int o2hb_region_get(const char *region_uuid) +{ + int ret = 0; + struct o2hb_region *reg; + + spin_lock(&o2hb_live_lock); + + reg = o2hb_find_region(region_uuid); + if (!reg) + ret = -ENOENT; + spin_unlock(&o2hb_live_lock); + + if (ret) + goto out; + + ret = o2nm_depend_this_node(); + if (ret) + goto out; + + ret = o2nm_depend_item(®->hr_item); + if (ret) + o2nm_undepend_this_node(); + +out: + return ret; +} + +static void o2hb_region_put(const char *region_uuid) +{ + struct o2hb_region *reg; + + spin_lock(&o2hb_live_lock); + + reg = o2hb_find_region(region_uuid); + + spin_unlock(&o2hb_live_lock); + + if (reg) { + o2nm_undepend_item(®->hr_item); + o2nm_undepend_this_node(); + } +} + +int o2hb_register_callback(const char *region_uuid, + struct o2hb_callback_func *hc) { struct o2hb_callback_func *tmp; struct list_head *iter; @@ -1681,6 +1760,12 @@ int o2hb_register_callback(struct o2hb_callback_func *hc) goto out; } + if (region_uuid) { + ret = o2hb_region_get(region_uuid); + if (ret) + goto out; + } + down_write(&o2hb_callback_sem); list_for_each(iter, &hbcall->list) { @@ -1702,16 +1787,21 @@ out: } EXPORT_SYMBOL_GPL(o2hb_register_callback); -void o2hb_unregister_callback(struct o2hb_callback_func *hc) +void o2hb_unregister_callback(const char *region_uuid, + struct o2hb_callback_func *hc) { BUG_ON(hc->hc_magic != O2HB_CB_MAGIC); mlog(ML_HEARTBEAT, "on behalf of %p for funcs %p\n", __builtin_return_address(0), hc); + /* XXX Can this happen _with_ a region reference? */ if (list_empty(&hc->hc_item)) return; + if (region_uuid) + o2hb_region_put(region_uuid); + down_write(&o2hb_callback_sem); list_del_init(&hc->hc_item); diff --git a/fs/ocfs2/cluster/heartbeat.h b/fs/ocfs2/cluster/heartbeat.h index cc6d40b3977..35397dd5ecd 100644 --- a/fs/ocfs2/cluster/heartbeat.h +++ b/fs/ocfs2/cluster/heartbeat.h @@ -69,8 +69,10 @@ void o2hb_setup_callback(struct o2hb_callback_func *hc, o2hb_cb_func *func, void *data, int priority); -int o2hb_register_callback(struct o2hb_callback_func *hc); -void o2hb_unregister_callback(struct o2hb_callback_func *hc); +int o2hb_register_callback(const char *region_uuid, + struct o2hb_callback_func *hc); +void o2hb_unregister_callback(const char *region_uuid, + struct o2hb_callback_func *hc); void o2hb_fill_node_map(unsigned long *map, unsigned bytes); void o2hb_init(void); diff --git a/fs/ocfs2/cluster/masklog.c b/fs/ocfs2/cluster/masklog.c index 2b205f5d579..e9e042b93db 100644 --- a/fs/ocfs2/cluster/masklog.c +++ b/fs/ocfs2/cluster/masklog.c @@ -74,7 +74,6 @@ struct mlog_attribute { #define define_mask(_name) { \ .attr = { \ .name = #_name, \ - .owner = THIS_MODULE, \ .mode = S_IRUGO | S_IWUSR, \ }, \ .mask = ML_##_name, \ diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c index 9f5ad0f01ce..af2070da308 100644 --- a/fs/ocfs2/cluster/nodemanager.c +++ b/fs/ocfs2/cluster/nodemanager.c @@ -900,6 +900,46 @@ static struct o2nm_cluster_group o2nm_cluster_group = { }, }; +int o2nm_depend_item(struct config_item *item) +{ + return configfs_depend_item(&o2nm_cluster_group.cs_subsys, item); +} + +void o2nm_undepend_item(struct config_item *item) +{ + configfs_undepend_item(&o2nm_cluster_group.cs_subsys, item); +} + +int o2nm_depend_this_node(void) +{ + int ret = 0; + struct o2nm_node *local_node; + + local_node = o2nm_get_node_by_num(o2nm_this_node()); + if (!local_node) { + ret = -EINVAL; + goto out; + } + + ret = o2nm_depend_item(&local_node->nd_item); + o2nm_node_put(local_node); + +out: + return ret; +} + +void o2nm_undepend_this_node(void) +{ + struct o2nm_node *local_node; + + local_node = o2nm_get_node_by_num(o2nm_this_node()); + BUG_ON(!local_node); + + o2nm_undepend_item(&local_node->nd_item); + o2nm_node_put(local_node); +} + + static void __exit exit_o2nm(void) { if (ocfs2_table_header) @@ -934,7 +974,7 @@ static int __init init_o2nm(void) goto out_sysctl; config_group_init(&o2nm_cluster_group.cs_subsys.su_group); - init_MUTEX(&o2nm_cluster_group.cs_subsys.su_sem); + mutex_init(&o2nm_cluster_group.cs_subsys.su_mutex); ret = configfs_register_subsystem(&o2nm_cluster_group.cs_subsys); if (ret) { printk(KERN_ERR "nodemanager: Registration returned %d\n", ret); diff --git a/fs/ocfs2/cluster/nodemanager.h b/fs/ocfs2/cluster/nodemanager.h index 070522138ae..7c860361b8d 100644 --- a/fs/ocfs2/cluster/nodemanager.h +++ b/fs/ocfs2/cluster/nodemanager.h @@ -77,4 +77,9 @@ struct o2nm_node *o2nm_get_node_by_ip(__be32 addr); void o2nm_node_get(struct o2nm_node *node); void o2nm_node_put(struct o2nm_node *node); +int o2nm_depend_item(struct config_item *item); +void o2nm_undepend_item(struct config_item *item); +int o2nm_depend_this_node(void); +void o2nm_undepend_this_node(void); + #endif /* O2CLUSTER_NODEMANAGER_H */ diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c index 0b229a9c795..f0bdfd944c4 100644 --- a/fs/ocfs2/cluster/tcp.c +++ b/fs/ocfs2/cluster/tcp.c @@ -261,14 +261,12 @@ out: static void o2net_complete_nodes_nsw(struct o2net_node *nn) { - struct list_head *iter, *tmp; + struct o2net_status_wait *nsw, *tmp; unsigned int num_kills = 0; - struct o2net_status_wait *nsw; assert_spin_locked(&nn->nn_lock); - list_for_each_safe(iter, tmp, &nn->nn_status_list) { - nsw = list_entry(iter, struct o2net_status_wait, ns_node_item); + list_for_each_entry_safe(nsw, tmp, &nn->nn_status_list, ns_node_item) { o2net_complete_nsw_locked(nn, nsw, O2NET_ERR_DIED, 0); num_kills++; } @@ -764,13 +762,10 @@ EXPORT_SYMBOL_GPL(o2net_register_handler); void o2net_unregister_handler_list(struct list_head *list) { - struct list_head *pos, *n; - struct o2net_msg_handler *nmh; + struct o2net_msg_handler *nmh, *n; write_lock(&o2net_handler_lock); - list_for_each_safe(pos, n, list) { - nmh = list_entry(pos, struct o2net_msg_handler, - nh_unregister_item); + list_for_each_entry_safe(nmh, n, list, nh_unregister_item) { mlog(ML_TCP, "unregistering handler func %p type %u key %08x\n", nmh->nh_func, nmh->nh_msg_type, nmh->nh_key); rb_erase(&nmh->nh_node, &o2net_handler_tree); @@ -1638,8 +1633,8 @@ static void o2net_hb_node_up_cb(struct o2nm_node *node, int node_num, void o2net_unregister_hb_callbacks(void) { - o2hb_unregister_callback(&o2net_hb_up); - o2hb_unregister_callback(&o2net_hb_down); + o2hb_unregister_callback(NULL, &o2net_hb_up); + o2hb_unregister_callback(NULL, &o2net_hb_down); } int o2net_register_hb_callbacks(void) @@ -1651,9 +1646,9 @@ int o2net_register_hb_callbacks(void) o2hb_setup_callback(&o2net_hb_up, O2HB_NODE_UP_CB, o2net_hb_node_up_cb, NULL, O2NET_HB_PRI); - ret = o2hb_register_callback(&o2net_hb_up); + ret = o2hb_register_callback(NULL, &o2net_hb_up); if (ret == 0) - ret = o2hb_register_callback(&o2net_hb_down); + ret = o2hb_register_callback(NULL, &o2net_hb_down); if (ret) o2net_unregister_hb_callbacks(); |