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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
Dave Chinnerd386b322013-08-12 20:49:31 +100028
29void xfs_trans_init(struct xfs_mount *);
Christoph Hellwige98c4142010-06-23 18:11:15 +100030void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *);
31void xfs_trans_del_item(struct xfs_log_item *);
Dave Chinnerd17c7012010-08-24 11:42:52 +100032void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn,
Christoph Hellwigeacb24e2015-06-04 13:47:43 +100033 bool abort);
Dave Chinner71e330b2010-05-21 14:37:18 +100034void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Dave Chinner0e57f6a2010-12-20 12:02:19 +110036void xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv,
37 xfs_lsn_t commit_lsn, int aborted);
Linus Torvalds1da177e2005-04-16 15:20:36 -070038/*
David Chinner27d8d5f2008-10-30 17:38:39 +110039 * AIL traversal cursor.
40 *
41 * Rather than using a generation number for detecting changes in the ail, use
42 * a cursor that is protected by the ail lock. The aild cursor exists in the
43 * struct xfs_ail, but other traversals can declare it on the stack and link it
44 * to the ail list.
45 *
46 * When an object is deleted from or moved int the AIL, the cursor list is
47 * searched to see if the object is a designated cursor item. If it is, it is
48 * deleted from the cursor so that the next time the cursor is used traversal
49 * will return to the start.
50 *
51 * This means a traversal colliding with a removal will cause a restart of the
52 * list scan, rather than any insertion or deletion anywhere in the list. The
53 * low bit of the item pointer is set if the cursor has been invalidated so
54 * that we can tell the difference between invalidation and reaching the end
55 * of the list to trigger traversal restarts.
56 */
57struct xfs_ail_cursor {
Dave Chinneraf3e4022011-07-18 03:40:18 +000058 struct list_head list;
David Chinner27d8d5f2008-10-30 17:38:39 +110059 struct xfs_log_item *item;
60};
61
62/*
63 * Private AIL structures.
64 *
65 * Eventually we need to drive the locking in here as well.
66 */
67struct xfs_ail {
68 struct xfs_mount *xa_mount;
Christoph Hellwig00308072011-10-11 11:14:10 -040069 struct task_struct *xa_task;
David Chinner27d8d5f2008-10-30 17:38:39 +110070 struct list_head xa_ail;
David Chinner27d8d5f2008-10-30 17:38:39 +110071 xfs_lsn_t xa_target;
Brian Foster8375f922012-06-28 06:52:56 -040072 xfs_lsn_t xa_target_prev;
Dave Chinneraf3e4022011-07-18 03:40:18 +000073 struct list_head xa_cursors;
David Chinnerc7e8f262008-10-30 17:39:23 +110074 spinlock_t xa_lock;
Dave Chinner0bf6a5b2011-04-08 12:45:07 +100075 xfs_lsn_t xa_last_pushed_lsn;
Dave Chinner670ce932011-09-30 04:45:03 +000076 int xa_log_flush;
Christoph Hellwig43ff2122012-04-23 15:58:39 +100077 struct list_head xa_buf_list;
Christoph Hellwig211e4d42012-04-23 15:58:34 +100078 wait_queue_head_t xa_empty;
David Chinner27d8d5f2008-10-30 17:38:39 +110079};
80
81/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 * From xfs_trans_ail.c
83 */
Dave Chinnere6059942010-12-20 12:34:26 +110084void xfs_trans_ail_update_bulk(struct xfs_ail *ailp,
Dave Chinner1d8c95a2011-07-18 03:40:16 +000085 struct xfs_ail_cursor *cur,
Dave Chinnere6059942010-12-20 12:34:26 +110086 struct xfs_log_item **log_items, int nr_items,
87 xfs_lsn_t lsn) __releases(ailp->xa_lock);
Jie Liu8d1d4082013-08-15 13:08:35 +080088/*
89 * Return a pointer to the first item in the AIL. If the AIL is empty, then
90 * return NULL.
91 */
92static inline struct xfs_log_item *
93xfs_ail_min(
94 struct xfs_ail *ailp)
95{
96 return list_first_entry_or_null(&ailp->xa_ail, struct xfs_log_item,
97 li_ail);
98}
99
Dave Chinnere6059942010-12-20 12:34:26 +1100100static inline void
101xfs_trans_ail_update(
102 struct xfs_ail *ailp,
103 struct xfs_log_item *lip,
104 xfs_lsn_t lsn) __releases(ailp->xa_lock)
105{
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000106 xfs_trans_ail_update_bulk(ailp, NULL, &lip, 1, lsn);
Dave Chinnere6059942010-12-20 12:34:26 +1100107}
108
Dave Chinner9552e7f2010-12-20 12:36:15 +1100109void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp,
Dave Chinner04913fd2012-04-23 15:58:41 +1000110 struct xfs_log_item **log_items, int nr_items,
111 int shutdown_type)
Dave Chinner9552e7f2010-12-20 12:36:15 +1100112 __releases(ailp->xa_lock);
113static inline void
114xfs_trans_ail_delete(
115 struct xfs_ail *ailp,
Dave Chinner04913fd2012-04-23 15:58:41 +1000116 xfs_log_item_t *lip,
117 int shutdown_type) __releases(ailp->xa_lock)
Dave Chinner9552e7f2010-12-20 12:36:15 +1100118{
Dave Chinner04913fd2012-04-23 15:58:41 +1000119 xfs_trans_ail_delete_bulk(ailp, &lip, 1, shutdown_type);
Dave Chinner9552e7f2010-12-20 12:36:15 +1100120}
121
Brian Foster146e54b2015-08-19 10:01:08 +1000122static inline void
123xfs_trans_ail_remove(
124 struct xfs_log_item *lip,
125 int shutdown_type)
126{
127 struct xfs_ail *ailp = lip->li_ailp;
128
129 spin_lock(&ailp->xa_lock);
130 /* xfs_trans_ail_delete() drops the AIL lock */
131 if (lip->li_flags & XFS_LI_IN_AIL)
132 xfs_trans_ail_delete(ailp, lip, shutdown_type);
133 else
134 spin_unlock(&ailp->xa_lock);
135}
136
Dave Chinnerfd074842011-04-08 12:45:07 +1000137void xfs_ail_push(struct xfs_ail *, xfs_lsn_t);
138void xfs_ail_push_all(struct xfs_ail *);
Christoph Hellwig211e4d42012-04-23 15:58:34 +1000139void xfs_ail_push_all_sync(struct xfs_ail *);
Christoph Hellwig1c304622012-04-23 15:58:33 +1000140struct xfs_log_item *xfs_ail_min(struct xfs_ail *ailp);
Dave Chinnerfd074842011-04-08 12:45:07 +1000141xfs_lsn_t xfs_ail_min_lsn(struct xfs_ail *ailp);
142
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000143struct xfs_log_item * xfs_trans_ail_cursor_first(struct xfs_ail *ailp,
David Chinner5b00f142008-10-30 17:39:00 +1100144 struct xfs_ail_cursor *cur,
145 xfs_lsn_t lsn);
Dave Chinner1d8c95a2011-07-18 03:40:16 +0000146struct xfs_log_item * xfs_trans_ail_cursor_last(struct xfs_ail *ailp,
147 struct xfs_ail_cursor *cur,
148 xfs_lsn_t lsn);
149struct xfs_log_item * xfs_trans_ail_cursor_next(struct xfs_ail *ailp,
David Chinner27d8d5f2008-10-30 17:38:39 +1100150 struct xfs_ail_cursor *cur);
Eric Sandeene4a1e292014-04-14 19:06:05 +1000151void xfs_trans_ail_cursor_done(struct xfs_ail_cursor *cur);
David Chinner82fa9012008-10-30 17:38:26 +1100152
David Chinner7b2e2a32008-10-30 17:39:12 +1100153#if BITS_PER_LONG != 64
154static inline void
155xfs_trans_ail_copy_lsn(
156 struct xfs_ail *ailp,
157 xfs_lsn_t *dst,
158 xfs_lsn_t *src)
159{
160 ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */
David Chinnerc7e8f262008-10-30 17:39:23 +1100161 spin_lock(&ailp->xa_lock);
David Chinner7b2e2a32008-10-30 17:39:12 +1100162 *dst = *src;
David Chinnerc7e8f262008-10-30 17:39:23 +1100163 spin_unlock(&ailp->xa_lock);
David Chinner7b2e2a32008-10-30 17:39:12 +1100164}
165#else
166static inline void
167xfs_trans_ail_copy_lsn(
168 struct xfs_ail *ailp,
169 xfs_lsn_t *dst,
170 xfs_lsn_t *src)
171{
172 ASSERT(sizeof(xfs_lsn_t) == 8);
173 *dst = *src;
174}
175#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176#endif /* __XFS_TRANS_PRIV_H__ */