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authorJoel Becker <joel.becker@oracle.com>2008-02-01 14:39:35 -0800
committerMark Fasheh <mfasheh@suse.com>2008-04-18 08:56:04 -0700
commit4670c46ded9a18268d1265417ff4ac72145a7917 (patch)
tree4f70822ddee389a9c8ed572b215a3355c20db3a1 /fs/ocfs2/stackglue.h
parent8f2c9c1b16bf6ed0903b29c49d56fa0109a390e4 (diff)
ocfs2: Introduce the new ocfs2_cluster_connect/disconnect() API.
This step introduces a cluster stack agnostic API for initializing and exiting. fs/ocfs2/dlmglue.c no longer uses o2cb/o2dlm knowledge to connect to the stack. It is all handled in stackglue.c. heartbeat.c no longer needs to know how it gets called. ocfs2_do_node_down() is now a clean recovery trigger. The big gotcha is the ordering of initializations and de-initializations done underneath ocfs2_cluster_connect(). ocfs2_dlm_init() used to do all o2dlm initialization in one block. Thus, the o2dlm functionality of ocfs2_cluster_connect() is very straightforward. ocfs2_dlm_shutdown(), however, did a few things between de-registration of the eviction callback and actually shutting down the domain. Now de-registration and shutdown of the domain are wrapped within the single ocfs2_cluster_disconnect() call. I've checked the code paths to make sure we can safely tear down things in ocfs2_dlm_shutdown() before calling ocfs2_cluster_disconnect(). The filesystem has already set itself to ignore the callback. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/stackglue.h')
-rw-r--r--fs/ocfs2/stackglue.h35
1 files changed, 33 insertions, 2 deletions
diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h
index 3c91e241892..3900b5c3933 100644
--- a/fs/ocfs2/stackglue.h
+++ b/fs/ocfs2/stackglue.h
@@ -32,9 +32,22 @@
*/
#define DLM_LKF_LOCAL 0x00100000
+/*
+ * This shadows DLM_LOCKSPACE_LEN in fs/dlm/dlm_internal.h. That probably
+ * wants to be in a public header.
+ */
+#define GROUP_NAME_MAX 64
+
+
#include "dlm/dlmapi.h"
+struct ocfs2_protocol_version {
+ u8 pv_major;
+ u8 pv_minor;
+};
+
struct ocfs2_locking_protocol {
+ struct ocfs2_protocol_version lp_max_version;
void (*lp_lock_ast)(void *astarg);
void (*lp_blocking_ast)(void *astarg, int level);
void (*lp_unlock_ast)(void *astarg, int error);
@@ -44,14 +57,32 @@ union ocfs2_dlm_lksb {
struct dlm_lockstatus lksb_o2dlm;
};
-int ocfs2_dlm_lock(struct dlm_ctxt *dlm,
+struct ocfs2_cluster_connection {
+ char cc_name[GROUP_NAME_MAX];
+ int cc_namelen;
+ struct ocfs2_protocol_version cc_version;
+ void (*cc_recovery_handler)(int node_num, void *recovery_data);
+ void *cc_recovery_data;
+ void *cc_lockspace;
+ void *cc_private;
+};
+
+int ocfs2_cluster_connect(const char *group,
+ int grouplen,
+ void (*recovery_handler)(int node_num,
+ void *recovery_data),
+ void *recovery_data,
+ struct ocfs2_cluster_connection **conn);
+int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn);
+
+int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
int mode,
union ocfs2_dlm_lksb *lksb,
u32 flags,
void *name,
unsigned int namelen,
void *astarg);
-int ocfs2_dlm_unlock(struct dlm_ctxt *dlm,
+int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
union ocfs2_dlm_lksb *lksb,
u32 flags,
void *astarg);