2 * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * 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.
14 * 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
18 #ifndef __XFS_TRANS_PRIV_H__
19 #define __XFS_TRANS_PRIV_H__
22 struct xfs_log_item_desc;
29 void xfs_trans_init(struct xfs_mount *);
30 int xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
31 void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *);
32 void xfs_trans_del_item(struct xfs_log_item *);
33 void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn,
35 void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp);
37 void xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv,
38 xfs_lsn_t commit_lsn, int aborted);
40 * AIL traversal cursor.
42 * Rather than using a generation number for detecting changes in the ail, use
43 * a cursor that is protected by the ail lock. The aild cursor exists in the
44 * struct xfs_ail, but other traversals can declare it on the stack and link it
47 * When an object is deleted from or moved int the AIL, the cursor list is
48 * searched to see if the object is a designated cursor item. If it is, it is
49 * deleted from the cursor so that the next time the cursor is used traversal
50 * will return to the start.
52 * This means a traversal colliding with a removal will cause a restart of the
53 * list scan, rather than any insertion or deletion anywhere in the list. The
54 * low bit of the item pointer is set if the cursor has been invalidated so
55 * that we can tell the difference between invalidation and reaching the end
56 * of the list to trigger traversal restarts.
58 struct xfs_ail_cursor {
59 struct list_head list;
60 struct xfs_log_item *item;
64 * Private AIL structures.
66 * Eventually we need to drive the locking in here as well.
69 struct xfs_mount *xa_mount;
70 struct task_struct *xa_task;
71 struct list_head xa_ail;
73 xfs_lsn_t xa_target_prev;
74 struct list_head xa_cursors;
76 xfs_lsn_t xa_last_pushed_lsn;
78 struct list_head xa_buf_list;
79 wait_queue_head_t xa_empty;
83 * From xfs_trans_ail.c
85 void xfs_trans_ail_update_bulk(struct xfs_ail *ailp,
86 struct xfs_ail_cursor *cur,
87 struct xfs_log_item **log_items, int nr_items,
88 xfs_lsn_t lsn) __releases(ailp->xa_lock);
92 struct xfs_log_item *lip,
93 xfs_lsn_t lsn) __releases(ailp->xa_lock)
95 xfs_trans_ail_update_bulk(ailp, NULL, &lip, 1, lsn);
98 void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp,
99 struct xfs_log_item **log_items, int nr_items,
101 __releases(ailp->xa_lock);
103 xfs_trans_ail_delete(
104 struct xfs_ail *ailp,
106 int shutdown_type) __releases(ailp->xa_lock)
108 xfs_trans_ail_delete_bulk(ailp, &lip, 1, shutdown_type);
111 void xfs_ail_push(struct xfs_ail *, xfs_lsn_t);
112 void xfs_ail_push_all(struct xfs_ail *);
113 void xfs_ail_push_all_sync(struct xfs_ail *);
114 struct xfs_log_item *xfs_ail_min(struct xfs_ail *ailp);
115 xfs_lsn_t xfs_ail_min_lsn(struct xfs_ail *ailp);
117 struct xfs_log_item * xfs_trans_ail_cursor_first(struct xfs_ail *ailp,
118 struct xfs_ail_cursor *cur,
120 struct xfs_log_item * xfs_trans_ail_cursor_last(struct xfs_ail *ailp,
121 struct xfs_ail_cursor *cur,
123 struct xfs_log_item * xfs_trans_ail_cursor_next(struct xfs_ail *ailp,
124 struct xfs_ail_cursor *cur);
125 void xfs_trans_ail_cursor_done(struct xfs_ail *ailp,
126 struct xfs_ail_cursor *cur);
128 #if BITS_PER_LONG != 64
130 xfs_trans_ail_copy_lsn(
131 struct xfs_ail *ailp,
135 ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */
136 spin_lock(&ailp->xa_lock);
138 spin_unlock(&ailp->xa_lock);
142 xfs_trans_ail_copy_lsn(
143 struct xfs_ail *ailp,
147 ASSERT(sizeof(xfs_lsn_t) == 8);
151 #endif /* __XFS_TRANS_PRIV_H__ */