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-rw-r--r--fs/ocfs2/stackglue.h95
1 files changed, 56 insertions, 39 deletions
diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h
index 03a44d60eac..8ce7398ae1d 100644
--- a/fs/ocfs2/stackglue.h
+++ b/fs/ocfs2/stackglue.h
@@ -56,17 +56,6 @@ struct ocfs2_protocol_version {
};
/*
- * The ocfs2_locking_protocol defines the handlers called on ocfs2's behalf.
- */
-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);
-};
-
-
-/*
* The dlm_lockstatus struct includes lvb space, but the dlm_lksb struct only
* has a pointer to separately allocated lvb space. This struct exists only to
* include in the lksb union to make space for a combined dlm_lksb and lvb.
@@ -81,12 +70,27 @@ struct fsdlm_lksb_plus_lvb {
* size of the union is known. Lock status structures are embedded in
* ocfs2 inodes.
*/
-union ocfs2_dlm_lksb {
- struct dlm_lockstatus lksb_o2dlm;
- struct dlm_lksb lksb_fsdlm;
- struct fsdlm_lksb_plus_lvb padding;
+struct ocfs2_cluster_connection;
+struct ocfs2_dlm_lksb {
+ union {
+ struct dlm_lockstatus lksb_o2dlm;
+ struct dlm_lksb lksb_fsdlm;
+ struct fsdlm_lksb_plus_lvb padding;
+ };
+ struct ocfs2_cluster_connection *lksb_conn;
+};
+
+/*
+ * The ocfs2_locking_protocol defines the handlers called on ocfs2's behalf.
+ */
+struct ocfs2_locking_protocol {
+ struct ocfs2_protocol_version lp_max_version;
+ void (*lp_lock_ast)(struct ocfs2_dlm_lksb *lksb);
+ void (*lp_blocking_ast)(struct ocfs2_dlm_lksb *lksb, int level);
+ void (*lp_unlock_ast)(struct ocfs2_dlm_lksb *lksb, int error);
};
+
/*
* A cluster connection. Mostly opaque to ocfs2, the connection holds
* state for the underlying stack. ocfs2 does use cc_version to determine
@@ -96,6 +100,7 @@ struct ocfs2_cluster_connection {
char cc_name[GROUP_NAME_MAX];
int cc_namelen;
struct ocfs2_protocol_version cc_version;
+ struct ocfs2_locking_protocol *cc_proto;
void (*cc_recovery_handler)(int node_num, void *recovery_data);
void *cc_recovery_data;
void *cc_lockspace;
@@ -155,27 +160,29 @@ struct ocfs2_stack_operations {
*
* ast and bast functions are not part of the call because the
* stack will likely want to wrap ast and bast calls before passing
- * them to stack->sp_proto.
+ * them to stack->sp_proto. There is no astarg. The lksb will
+ * be passed back to the ast and bast functions. The caller can
+ * use this to find their object.
*/
int (*dlm_lock)(struct ocfs2_cluster_connection *conn,
int mode,
- union ocfs2_dlm_lksb *lksb,
+ struct ocfs2_dlm_lksb *lksb,
u32 flags,
void *name,
- unsigned int namelen,
- void *astarg);
+ unsigned int namelen);
/*
* Call the underlying dlm unlock function. The ->dlm_unlock()
* function should convert the flags as appropriate.
*
* The unlock ast is not passed, as the stack will want to wrap
- * it before calling stack->sp_proto->lp_unlock_ast().
+ * it before calling stack->sp_proto->lp_unlock_ast(). There is
+ * no astarg. The lksb will be passed back to the unlock ast
+ * function. The caller can use this to find their object.
*/
int (*dlm_unlock)(struct ocfs2_cluster_connection *conn,
- union ocfs2_dlm_lksb *lksb,
- u32 flags,
- void *astarg);
+ struct ocfs2_dlm_lksb *lksb,
+ u32 flags);
/*
* Return the status of the current lock status block. The fs
@@ -183,17 +190,17 @@ struct ocfs2_stack_operations {
* callback pulls out the stack-specific lksb, converts the status
* to a proper errno, and returns it.
*/
- int (*lock_status)(union ocfs2_dlm_lksb *lksb);
+ int (*lock_status)(struct ocfs2_dlm_lksb *lksb);
/*
* Return non-zero if the LVB is valid.
*/
- int (*lvb_valid)(union ocfs2_dlm_lksb *lksb);
+ int (*lvb_valid)(struct ocfs2_dlm_lksb *lksb);
/*
* Pull the lvb pointer off of the stack-specific lksb.
*/
- void *(*lock_lvb)(union ocfs2_dlm_lksb *lksb);
+ void *(*lock_lvb)(struct ocfs2_dlm_lksb *lksb);
/*
* Cluster-aware posix locks
@@ -210,7 +217,7 @@ struct ocfs2_stack_operations {
* This is an optoinal debugging hook. If provided, the
* stack can dump debugging information about this lock.
*/
- void (*dump_lksb)(union ocfs2_dlm_lksb *lksb);
+ void (*dump_lksb)(struct ocfs2_dlm_lksb *lksb);
};
/*
@@ -226,7 +233,7 @@ struct ocfs2_stack_plugin {
/* These are managed by the stackglue code. */
struct list_head sp_list;
unsigned int sp_count;
- struct ocfs2_locking_protocol *sp_proto;
+ struct ocfs2_protocol_version sp_max_proto;
};
@@ -234,10 +241,22 @@ struct ocfs2_stack_plugin {
int ocfs2_cluster_connect(const char *stack_name,
const char *group,
int grouplen,
+ struct ocfs2_locking_protocol *lproto,
void (*recovery_handler)(int node_num,
void *recovery_data),
void *recovery_data,
struct ocfs2_cluster_connection **conn);
+/*
+ * Used by callers that don't store their stack name. They must ensure
+ * all nodes have the same stack.
+ */
+int ocfs2_cluster_connect_agnostic(const char *group,
+ int grouplen,
+ struct ocfs2_locking_protocol *lproto,
+ 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 hangup_pending);
void ocfs2_cluster_hangup(const char *group, int grouplen);
@@ -246,26 +265,24 @@ int ocfs2_cluster_this_node(unsigned int *node);
struct ocfs2_lock_res;
int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
int mode,
- union ocfs2_dlm_lksb *lksb,
+ struct ocfs2_dlm_lksb *lksb,
u32 flags,
void *name,
- unsigned int namelen,
- struct ocfs2_lock_res *astarg);
+ unsigned int namelen);
int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
- union ocfs2_dlm_lksb *lksb,
- u32 flags,
- struct ocfs2_lock_res *astarg);
+ struct ocfs2_dlm_lksb *lksb,
+ u32 flags);
-int ocfs2_dlm_lock_status(union ocfs2_dlm_lksb *lksb);
-int ocfs2_dlm_lvb_valid(union ocfs2_dlm_lksb *lksb);
-void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb);
-void ocfs2_dlm_dump_lksb(union ocfs2_dlm_lksb *lksb);
+int ocfs2_dlm_lock_status(struct ocfs2_dlm_lksb *lksb);
+int ocfs2_dlm_lvb_valid(struct ocfs2_dlm_lksb *lksb);
+void *ocfs2_dlm_lvb(struct ocfs2_dlm_lksb *lksb);
+void ocfs2_dlm_dump_lksb(struct ocfs2_dlm_lksb *lksb);
int ocfs2_stack_supports_plocks(void);
int ocfs2_plock(struct ocfs2_cluster_connection *conn, u64 ino,
struct file *file, int cmd, struct file_lock *fl);
-void ocfs2_stack_glue_set_locking_protocol(struct ocfs2_locking_protocol *proto);
+void ocfs2_stack_glue_set_max_proto_version(struct ocfs2_protocol_version *max_proto);
/* Used by stack plugins */