/*
- * Copyright (c) 2000, 2002 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
*
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_TRANS_PRIV_H__
#define __XFS_TRANS_PRIV_H__
struct xfs_log_item_desc *xfs_trans_first_item(struct xfs_trans *);
struct xfs_log_item_desc *xfs_trans_next_item(struct xfs_trans *,
struct xfs_log_item_desc *);
-void xfs_trans_free_items(struct xfs_trans *, int);
-void xfs_trans_unlock_items(struct xfs_trans *,
- xfs_lsn_t);
-void xfs_trans_free_busy(xfs_trans_t *tp);
-xfs_log_busy_slot_t *xfs_trans_add_busy(xfs_trans_t *tp,
- xfs_agnumber_t ag,
- xfs_extlen_t idx);
+
+void xfs_trans_unlock_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn);
+void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn,
+ int flags);
+
+void xfs_trans_item_committed(struct xfs_log_item *lip,
+ xfs_lsn_t commit_lsn, int aborted);
+void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp);
+
+/*
+ * AIL traversal cursor.
+ *
+ * Rather than using a generation number for detecting changes in the ail, use
+ * a cursor that is protected by the ail lock. The aild cursor exists in the
+ * struct xfs_ail, but other traversals can declare it on the stack and link it
+ * to the ail list.
+ *
+ * When an object is deleted from or moved int the AIL, the cursor list is
+ * searched to see if the object is a designated cursor item. If it is, it is
+ * deleted from the cursor so that the next time the cursor is used traversal
+ * will return to the start.
+ *
+ * This means a traversal colliding with a removal will cause a restart of the
+ * list scan, rather than any insertion or deletion anywhere in the list. The
+ * low bit of the item pointer is set if the cursor has been invalidated so
+ * that we can tell the difference between invalidation and reaching the end
+ * of the list to trigger traversal restarts.
+ */
+struct xfs_ail_cursor {
+ struct xfs_ail_cursor *next;
+ struct xfs_log_item *item;
+};
+
+/*
+ * Private AIL structures.
+ *
+ * Eventually we need to drive the locking in here as well.
+ */
+struct xfs_ail {
+ struct xfs_mount *xa_mount;
+ struct list_head xa_ail;
+ uint xa_gen;
+ struct task_struct *xa_task;
+ xfs_lsn_t xa_target;
+ struct xfs_ail_cursor xa_cursors;
+ spinlock_t xa_lock;
+};
/*
* From xfs_trans_ail.c
*/
-void xfs_trans_update_ail(struct xfs_mount *,
- struct xfs_log_item *, xfs_lsn_t,
- unsigned long);
-void xfs_trans_delete_ail(struct xfs_mount *,
- struct xfs_log_item *, unsigned long);
-struct xfs_log_item *xfs_trans_first_ail(struct xfs_mount *, int *);
-struct xfs_log_item *xfs_trans_next_ail(struct xfs_mount *,
- struct xfs_log_item *, int *, int *);
+void xfs_trans_ail_update(struct xfs_ail *ailp,
+ struct xfs_log_item *lip, xfs_lsn_t lsn)
+ __releases(ailp->xa_lock);
+void xfs_trans_ail_delete(struct xfs_ail *ailp,
+ struct xfs_log_item *lip)
+ __releases(ailp->xa_lock);
+void xfs_trans_ail_push(struct xfs_ail *, xfs_lsn_t);
+void xfs_trans_unlocked_item(struct xfs_ail *,
+ xfs_log_item_t *);
+
+xfs_lsn_t xfs_trans_ail_tail(struct xfs_ail *ailp);
+
+struct xfs_log_item *xfs_trans_ail_cursor_first(struct xfs_ail *ailp,
+ struct xfs_ail_cursor *cur,
+ xfs_lsn_t lsn);
+struct xfs_log_item *xfs_trans_ail_cursor_next(struct xfs_ail *ailp,
+ struct xfs_ail_cursor *cur);
+void xfs_trans_ail_cursor_done(struct xfs_ail *ailp,
+ struct xfs_ail_cursor *cur);
+long xfsaild_push(struct xfs_ail *, xfs_lsn_t *);
+void xfsaild_wakeup(struct xfs_ail *, xfs_lsn_t);
+int xfsaild_start(struct xfs_ail *);
+void xfsaild_stop(struct xfs_ail *);
+#if BITS_PER_LONG != 64
+static inline void
+xfs_trans_ail_copy_lsn(
+ struct xfs_ail *ailp,
+ xfs_lsn_t *dst,
+ xfs_lsn_t *src)
+{
+ ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */
+ spin_lock(&ailp->xa_lock);
+ *dst = *src;
+ spin_unlock(&ailp->xa_lock);
+}
+#else
+static inline void
+xfs_trans_ail_copy_lsn(
+ struct xfs_ail *ailp,
+ xfs_lsn_t *dst,
+ xfs_lsn_t *src)
+{
+ ASSERT(sizeof(xfs_lsn_t) == 8);
+ *dst = *src;
+}
+#endif
#endif /* __XFS_TRANS_PRIV_H__ */
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