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author | Joel Becker <joel.becker@oracle.com> | 2007-06-15 04:40:49 (GMT) |
---|---|---|
committer | Mark Fasheh <mark.fasheh@oracle.com> | 2007-07-11 00:19:40 (GMT) |
commit | 14829422be6d6b6721f61b1e749acf5a9cb664d8 (patch) | |
tree | 4a8c931b431653aa5e35523f43ebcddffa8641b8 /fs/ocfs2/cluster | |
parent | 631d1febab8e546e3bb800bdfe2c212b8adf87de (diff) | |
download | linux-fsl-qoriq-14829422be6d6b6721f61b1e749acf5a9cb664d8.tar.xz |
ocfs2: Depend on configfs heartbeat items.
ocfs2 mounts require a heartbeat region. Use the new configfs_depend_item()
facility to actually depend on them so they can't go away from under us.
First, teach cluster/nodemanager.c to depend an item on the o2cb subsystem.
Then teach o2hb_register_callbacks to take a UUID and depend on the
appropriate region. Finally, teach all users of o2hb to pass a UUID or
NULL if they don't require a pin.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/cluster')
-rw-r--r-- | fs/ocfs2/cluster/heartbeat.c | 64 | ||||
-rw-r--r-- | fs/ocfs2/cluster/heartbeat.h | 6 | ||||
-rw-r--r-- | fs/ocfs2/cluster/nodemanager.c | 10 | ||||
-rw-r--r-- | fs/ocfs2/cluster/nodemanager.h | 3 | ||||
-rw-r--r-- | fs/ocfs2/cluster/tcp.c | 8 |
5 files changed, 83 insertions, 8 deletions
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c index 9791134..e331f4c 100644 --- a/fs/ocfs2/cluster/heartbeat.c +++ b/fs/ocfs2/cluster/heartbeat.c @@ -1665,7 +1665,56 @@ 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) + ret = o2nm_depend_item(®->hr_item); + + 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); +} + +int o2hb_register_callback(const char *region_uuid, + struct o2hb_callback_func *hc) { struct o2hb_callback_func *tmp; struct list_head *iter; @@ -1681,6 +1730,12 @@ 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 +1757,21 @@ 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 cc6d40b..35397dd 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/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c index 48b77d1..eab46d8 100644 --- a/fs/ocfs2/cluster/nodemanager.c +++ b/fs/ocfs2/cluster/nodemanager.c @@ -900,6 +900,16 @@ 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); +} + static void __exit exit_o2nm(void) { if (ocfs2_table_header) diff --git a/fs/ocfs2/cluster/nodemanager.h b/fs/ocfs2/cluster/nodemanager.h index 0705221..55ae1a0 100644 --- a/fs/ocfs2/cluster/nodemanager.h +++ b/fs/ocfs2/cluster/nodemanager.h @@ -77,4 +77,7 @@ 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); + #endif /* O2CLUSTER_NODEMANAGER_H */ diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c index 0b229a9..d58c7dd 100644 --- a/fs/ocfs2/cluster/tcp.c +++ b/fs/ocfs2/cluster/tcp.c @@ -1638,8 +1638,8 @@ 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 +1651,9 @@ 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(); |