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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_TRANS_PRIV_H__
19#define __XFS_TRANS_PRIV_H__
20
21struct xfs_log_item;
22struct xfs_log_item_desc;
23struct xfs_mount;
24struct xfs_trans;
Dave Chinner0e57f6a2010-12-20 12:02:19 +110025struct xfs_ail;
26struct xfs_log_vec;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
Christoph Hellwige98c4142010-06-23 18:11:15 +100028void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *);
29void xfs_trans_del_item(struct xfs_log_item *);
Dave Chinnerd17c7012010-08-24 11:42:52 +100030void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn,
31 int flags);
Dave Chinner71e330b2010-05-21 14:37:18 +100032void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Dave Chinner0e57f6a2010-12-20 12:02:19 +110034void xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv,
35 xfs_lsn_t commit_lsn, int aborted);
Linus Torvalds1da177e2005-04-16 15:20:36 -070036/*
David Chinner27d8d5f2008-10-30 17:38:39 +110037 * AIL traversal cursor.
38 *
39 * Rather than using a generation number for detecting changes in the ail, use
40 * a cursor that is protected by the ail lock. The aild cursor exists in the
41 * struct xfs_ail, but other traversals can declare it on the stack and link it
42 * to the ail list.
43 *
44 * When an object is deleted from or moved int the AIL, the cursor list is
45 * searched to see if the object is a designated cursor item. If it is, it is
46 * deleted from the cursor so that the next time the cursor is used traversal
47 * will return to the start.
48 *
49 * This means a traversal colliding with a removal will cause a restart of the
50 * list scan, rather than any insertion or deletion anywhere in the list. The
51 * low bit of the item pointer is set if the cursor has been invalidated so
52 * that we can tell the difference between invalidation and reaching the end
53 * of the list to trigger traversal restarts.
54 */
55struct xfs_ail_cursor {
Dave Chinneraf3e4022011-07-18 03:40:18 +000056 struct list_head list;
David Chinner27d8d5f2008-10-30 17:38:39 +110057 struct xfs_log_item *item;
58};
59
60/*
61 * Private AIL structures.
62 *
63 * Eventually we need to drive the locking in here as well.
64 */
65struct xfs_ail {
66 struct xfs_mount *xa_mount;
Christoph Hellwig00308072011-10-11 11:14:10 -040067 struct task_struct *xa_task;
David Chinner27d8d5f2008-10-30 17:38:39 +110068 struct list_head xa_ail;
David Chinner27d8d5f2008-10-30 17:38:39 +110069 xfs_lsn_t xa_target;
Brian Foster8375f922012-06-28 06:52:56 -040070 xfs_lsn_t xa_target_prev;
Dave Chinneraf3e4022011-07-18 03:40:18 +000071 struct list_head xa_cursors;
David Chinnerc7e8f262008-10-30 17:39:23 +110072 spinlock_t xa_lock;
Dave Chinner0bf6a5b2011-04-08 12:45:07 +100073 xfs_lsn_t xa_last_pushed_lsn;
Dave Chinner670ce932011-09-30 04:45:03 +000074 int xa_log_flush;
Christoph Hellwig43ff2122012-04-23 15:58:39 +100075 struct list_head xa_buf_list;
Christoph Hellwig211e4d42012-04-23 15:58:34 +100076 wait_queue_head_t xa_empty;
David Chinner27d8d5f2008-10-30 17:38:39 +110077};
78
79/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 * From xfs_trans_ail.c
81 */
Dave Chinnere6059942010-12-20 12:34:26 +110082void xfs_trans_ail_update_bulk(struct xfs_ail *ailp,
Dave Chinner1d8c95a2011-07-18 03:40:16 +000083 struct xfs_ail_cursor *cur,
Dave Chinnere6059942010-12-20 12:34:26 +110084 struct xfs_log_item **log_items, int nr_items,
85 xfs_lsn_t lsn) __releases(ailp->xa_lock);
86static inline void
87xfs_trans_ail_update(
88 struct xfs_ail *ailp,
89 struct xfs_log_item *lip,
90 xfs_lsn_t lsn) __releases(ailp->xa_lock)
91{
Dave Chinner1d8c95a2011-07-18 03:40:16 +000092 xfs_trans_ail_update_bulk(ailp, NULL, &lip, 1, lsn);
Dave Chinnere6059942010-12-20 12:34:26 +110093}
94
Dave Chinner9552e7f2010-12-20 12:36:15 +110095void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp,
Dave Chinner04913fd2012-04-23 15:58:41 +100096 struct xfs_log_item **log_items, int nr_items,
97 int shutdown_type)
Dave Chinner9552e7f2010-12-20 12:36:15 +110098 __releases(ailp->xa_lock);
99static inline void
100xfs_trans_ail_delete(
101 struct xfs_ail *ailp,
Dave Chinner04913fd2012-04-23 15:58:41 +1000102 xfs_log_item_t *lip,
103 int shutdown_type) __releases(ailp->xa_lock)
Dave Chinner9552e7f2010-12-20 12:36:15 +1100104{
Dave Chinner04913fd2012-04-23 15:58:41 +1000105 xfs_trans_ail_delete_bulk(ailp, &lip, 1, shutdown_type);
Dave Chinner9552e7f2010-12-20 12:36:15 +1100106}
107
Dave Chinnerfd074842011-04-08 12:45:07 +1000108void xfs_ail_push(struct xfs_ail *, xfs_lsn_t);
109void xfs_ail_push_all(struct xfs_ail *);
Christoph Hellwig211e4d42012-04-23 15:58:34 +1000110void xfs_ail_push_all_sync(struct xfs_ail *);
Christoph Hellwig1c304622012-04-23 15:58:33 +1000111struct xfs_log_item *xfs_ail_min(struct xfs_ail *ailp);
Dave Chinnerfd074842011-04-08 12:45:07 +1000112xfs_lsn_t xfs_ail_min_lsn(struct xfs_ail *ailp);
113
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000114struct xfs_log_item * xfs_trans_ail_cursor_first(struct xfs_ail *ailp,
David Chinner5b00f142008-10-30 17:39:00 +1100115 struct xfs_ail_cursor *cur,
116 xfs_lsn_t lsn);
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000117struct xfs_log_item * xfs_trans_ail_cursor_last(struct xfs_ail *ailp,
118 struct xfs_ail_cursor *cur,
119 xfs_lsn_t lsn);
120struct xfs_log_item * xfs_trans_ail_cursor_next(struct xfs_ail *ailp,
David Chinner27d8d5f2008-10-30 17:38:39 +1100121 struct xfs_ail_cursor *cur);
David Chinner5b00f142008-10-30 17:39:00 +1100122void xfs_trans_ail_cursor_done(struct xfs_ail *ailp,
David Chinner27d8d5f2008-10-30 17:38:39 +1100123 struct xfs_ail_cursor *cur);
David Chinner82fa9012008-10-30 17:38:26 +1100124
David Chinner7b2e2a32008-10-30 17:39:12 +1100125#if BITS_PER_LONG != 64
126static inline void
127xfs_trans_ail_copy_lsn(
128 struct xfs_ail *ailp,
129 xfs_lsn_t *dst,
130 xfs_lsn_t *src)
131{
132 ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */
David Chinnerc7e8f262008-10-30 17:39:23 +1100133 spin_lock(&ailp->xa_lock);
David Chinner7b2e2a32008-10-30 17:39:12 +1100134 *dst = *src;
David Chinnerc7e8f262008-10-30 17:39:23 +1100135 spin_unlock(&ailp->xa_lock);
David Chinner7b2e2a32008-10-30 17:39:12 +1100136}
137#else
138static inline void
139xfs_trans_ail_copy_lsn(
140 struct xfs_ail *ailp,
141 xfs_lsn_t *dst,
142 xfs_lsn_t *src)
143{
144 ASSERT(sizeof(xfs_lsn_t) == 8);
145 *dst = *src;
146}
147#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148#endif /* __XFS_TRANS_PRIV_H__ */