[GFS2] Remove one typedef

This removes one of the typedefs from the locking interface. It
is replaced by a forward declaration of the gfs2 superblock. The
other two are not so easy to solve since in their case, they
can refer to one of two possible structures.

Cc: David Teigland <teigland@redhat.com>
Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/glock.c

@@ -1704,7 +1704,7 @@ static void blocking_cb(struct gfs2_sbd *sdp, struct lm_lockname *name,
 
 /**
  * gfs2_glock_cb - Callback used by locking module
- * @fsdata: Pointer to the superblock
+ * @sdp: Pointer to the superblock
  * @type: Type of callback
  * @data: Type dependent data pointer
  *
@@ -1713,9 +1713,8 @@ static void blocking_cb(struct gfs2_sbd *sdp, struct lm_lockname *name,
  * a journal from another client needs to be recovered.
  */
 
-void gfs2_glock_cb(lm_fsdata_t *fsdata, unsigned int type, void *data)
+void gfs2_glock_cb(struct gfs2_sbd *sdp, unsigned int type, void *data)
 {
-	struct gfs2_sbd *sdp = (struct gfs2_sbd *)fsdata;
 
 	switch (type) {
 	case LM_CB_NEED_E:

fs/gfs2/glock.h

@@ -140,7 +140,7 @@ static inline int gfs2_glock_nq_init(struct gfs2_glock *gl,
 int gfs2_lvb_hold(struct gfs2_glock *gl);
 void gfs2_lvb_unhold(struct gfs2_glock *gl);
 
-void gfs2_glock_cb(lm_fsdata_t *fsdata, unsigned int type, void *data);
+void gfs2_glock_cb(struct gfs2_sbd *sdp, unsigned int type, void *data);
 
 void gfs2_iopen_go_callback(struct gfs2_glock *gl, unsigned int state);
 

fs/gfs2/lm_interface.h

@@ -17,10 +17,9 @@
 
 typedef void lm_lockspace_t;
 typedef void lm_lock_t;
-typedef void lm_fsdata_t;
+struct gfs2_sbd;
 
-typedef void (*lm_callback_t) (lm_fsdata_t *fsdata, unsigned int type,
-			       void *data);
+typedef void (*lm_callback_t) (struct gfs2_sbd *sdp, unsigned int type, void *data);
 
 /*
  * lm_mount() flags
@@ -183,7 +182,7 @@ struct lm_lockops {
 	 */
 
 	int (*lm_mount) (char *table_name, char *host_data,
-			 lm_callback_t cb, lm_fsdata_t *fsdata,
+			 lm_callback_t cb, struct gfs2_sbd *sdp,
 			 unsigned int min_lvb_size, int flags,
 			 struct lm_lockstruct *lockstruct,
 			 struct kobject *fskobj);
@@ -275,7 +274,7 @@ void gfs2_unregister_lockproto(struct lm_lockops *proto);
  */
 
 int gfs2_mount_lockproto(char *proto_name, char *table_name, char *host_data,
-			 lm_callback_t cb, lm_fsdata_t *fsdata,
+			 lm_callback_t cb, struct gfs2_sbd *sdp,
 			 unsigned int min_lvb_size, int flags,
 			 struct lm_lockstruct *lockstruct,
 			 struct kobject *fskobj);

fs/gfs2/locking.c

@@ -99,7 +99,7 @@ void gfs2_unregister_lockproto(struct lm_lockops *proto)
  * @table_name - the name of the lock space
  * @host_data - data specific to this host
  * @cb - the callback to the code using the lock module
- * @fsdata - data to pass back with the callback
+ * @sdp - The GFS2 superblock
  * @min_lvb_size - the mininum LVB size that the caller can deal with
  * @flags - LM_MFLAG_*
  * @lockstruct - a structure returned describing the mount
@@ -108,7 +108,7 @@ void gfs2_unregister_lockproto(struct lm_lockops *proto)
  */
 
 int gfs2_mount_lockproto(char *proto_name, char *table_name, char *host_data,
-			 lm_callback_t cb, lm_fsdata_t *fsdata,
+			 lm_callback_t cb, struct gfs2_sbd *sdp,
 			 unsigned int min_lvb_size, int flags,
 			 struct lm_lockstruct *lockstruct,
 			 struct kobject *fskobj)
@@ -147,7 +147,7 @@ retry:
 		goto retry;
 	}
 
-	error = lw->lw_ops->lm_mount(table_name, host_data, cb, fsdata,
+	error = lw->lw_ops->lm_mount(table_name, host_data, cb, sdp,
 				     min_lvb_size, flags, lockstruct, fskobj);
 	if (error)
 		module_put(lw->lw_ops->lm_owner);

fs/gfs2/locking/dlm/lock_dlm.h

@@ -67,7 +67,7 @@ struct gdlm_ls {
 	int			fsflags;
 	dlm_lockspace_t		*dlm_lockspace;
 	lm_callback_t		fscb;
-	lm_fsdata_t		*fsdata;
+	struct gfs2_sbd		*sdp;
 	int			recover_jid;
 	int			recover_jid_done;
 	int			recover_jid_status;

fs/gfs2/locking/dlm/mount.c

@@ -14,7 +14,7 @@ int gdlm_drop_period;
 struct lm_lockops gdlm_ops;
 
 
-static struct gdlm_ls *init_gdlm(lm_callback_t cb, lm_fsdata_t *fsdata,
+static struct gdlm_ls *init_gdlm(lm_callback_t cb, struct gfs2_sbd *sdp,
 				 int flags, char *table_name)
 {
 	struct gdlm_ls *ls;
@@ -27,7 +27,7 @@ static struct gdlm_ls *init_gdlm(lm_callback_t cb, lm_fsdata_t *fsdata,
 	ls->drop_locks_count = gdlm_drop_count;
 	ls->drop_locks_period = gdlm_drop_period;
 	ls->fscb = cb;
-	ls->fsdata = fsdata;
+	ls->sdp = sdp;
 	ls->fsflags = flags;
 	spin_lock_init(&ls->async_lock);
 	INIT_LIST_HEAD(&ls->complete);
@@ -120,7 +120,7 @@ static int make_args(struct gdlm_ls *ls, char *data_arg, int *nodir)
 }
 
 static int gdlm_mount(char *table_name, char *host_data,
-			lm_callback_t cb, lm_fsdata_t *fsdata,
+			lm_callback_t cb, struct gfs2_sbd *sdp,
 			unsigned int min_lvb_size, int flags,
 			struct lm_lockstruct *lockstruct,
 			struct kobject *fskobj)
@@ -131,7 +131,7 @@ static int gdlm_mount(char *table_name, char *host_data,
 	if (min_lvb_size > GDLM_LVB_SIZE)
 		goto out;
 
-	ls = init_gdlm(cb, fsdata, flags, table_name);
+	ls = init_gdlm(cb, sdp, flags, table_name);
 	if (!ls)
 		goto out;
 

fs/gfs2/locking/dlm/sysfs.c

@@ -102,7 +102,7 @@ static ssize_t recover_show(struct gdlm_ls *ls, char *buf)
 static ssize_t recover_store(struct gdlm_ls *ls, const char *buf, size_t len)
 {
 	ls->recover_jid = simple_strtol(buf, NULL, 0);
-	ls->fscb(ls->fsdata, LM_CB_NEED_RECOVERY, &ls->recover_jid);
+	ls->fscb(ls->sdp, LM_CB_NEED_RECOVERY, &ls->recover_jid);
 	return len;
 }
 

fs/gfs2/locking/dlm/thread.c

@@ -41,7 +41,7 @@ static void process_blocking(struct gdlm_lock *lp, int bast_mode)
 		gdlm_assert(0, "unknown bast mode %u", lp->bast_mode);
 	}
 
-	ls->fscb(ls->fsdata, cb, &lp->lockname);
+	ls->fscb(ls->sdp, cb, &lp->lockname);
 }
 
 static void process_complete(struct gdlm_lock *lp)
@@ -232,7 +232,7 @@ out:
 	    (lp->cur > DLM_LOCK_NL) && (prev_mode > DLM_LOCK_NL))
 		acb.lc_ret |= LM_OUT_CACHEABLE;
 
-	ls->fscb(ls->fsdata, LM_CB_ASYNC, &acb);
+	ls->fscb(ls->sdp, LM_CB_ASYNC, &acb);
 }
 
 static inline int no_work(struct gdlm_ls *ls, int blocking)
@@ -318,7 +318,7 @@ static int gdlm_thread(void *data)
 			gdlm_do_lock(lp);
 
 		if (drop)
-			ls->fscb(ls->fsdata, LM_CB_DROPLOCKS, NULL);
+			ls->fscb(ls->sdp, LM_CB_DROPLOCKS, NULL);
 
 		schedule();
 	}

fs/gfs2/locking/nolock/main.c

@@ -24,7 +24,7 @@ struct nolock_lockspace {
 static struct lm_lockops nolock_ops;
 
 static int nolock_mount(char *table_name, char *host_data,
-			lm_callback_t cb, lm_fsdata_t *fsdata,
+			lm_callback_t cb, struct gfs2_sbd *sdp,
 			unsigned int min_lvb_size, int flags,
 			struct lm_lockstruct *lockstruct,
 			struct kobject *fskobj)