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 void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *);
31 void xfs_trans_del_item(struct xfs_log_item *);
32 void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn,
34 void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp);
36 void xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv,
37 xfs_lsn_t commit_lsn, int aborted);
39 * AIL traversal cursor.
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
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.
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.
57 struct xfs_ail_cursor {
58 struct list_head list;
59 struct xfs_log_item *item;
63 * Private AIL structures.
65 * Eventually we need to drive the locking in here as well.
68 struct xfs_mount *xa_mount;
69 struct task_struct *xa_task;
70 struct list_head xa_ail;
72 xfs_lsn_t xa_target_prev;
73 struct list_head xa_cursors;
75 xfs_lsn_t xa_last_pushed_lsn;
77 struct list_head xa_buf_list;
78 wait_queue_head_t xa_empty;
82 * From xfs_trans_ail.c
84 void xfs_trans_ail_update_bulk(struct xfs_ail *ailp,
85 struct xfs_ail_cursor *cur,
86 struct xfs_log_item **log_items, int nr_items,
87 xfs_lsn_t lsn) __releases(ailp->xa_lock);
89 * Return a pointer to the first item in the AIL. If the AIL is empty, then
92 static inline struct xfs_log_item *
96 return list_first_entry_or_null(&ailp->xa_ail, struct xfs_log_item,
101 xfs_trans_ail_update(
102 struct xfs_ail *ailp,
103 struct xfs_log_item *lip,
104 xfs_lsn_t lsn) __releases(ailp->xa_lock)
106 xfs_trans_ail_update_bulk(ailp, NULL, &lip, 1, lsn);
109 void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp,
110 struct xfs_log_item **log_items, int nr_items,
112 __releases(ailp->xa_lock);
114 xfs_trans_ail_delete(
115 struct xfs_ail *ailp,
117 int shutdown_type) __releases(ailp->xa_lock)
119 xfs_trans_ail_delete_bulk(ailp, &lip, 1, shutdown_type);
123 xfs_trans_ail_remove(
124 struct xfs_log_item *lip,
127 struct xfs_ail *ailp = lip->li_ailp;
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);
134 spin_unlock(&ailp->xa_lock);
137 void xfs_ail_push(struct xfs_ail *, xfs_lsn_t);
138 void xfs_ail_push_all(struct xfs_ail *);
139 void xfs_ail_push_all_sync(struct xfs_ail *);
140 struct xfs_log_item *xfs_ail_min(struct xfs_ail *ailp);
141 xfs_lsn_t xfs_ail_min_lsn(struct xfs_ail *ailp);
143 struct xfs_log_item * xfs_trans_ail_cursor_first(struct xfs_ail *ailp,
144 struct xfs_ail_cursor *cur,
146 struct xfs_log_item * xfs_trans_ail_cursor_last(struct xfs_ail *ailp,
147 struct xfs_ail_cursor *cur,
149 struct xfs_log_item * xfs_trans_ail_cursor_next(struct xfs_ail *ailp,
150 struct xfs_ail_cursor *cur);
151 void xfs_trans_ail_cursor_done(struct xfs_ail_cursor *cur);
153 #if BITS_PER_LONG != 64
155 xfs_trans_ail_copy_lsn(
156 struct xfs_ail *ailp,
160 ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */
161 spin_lock(&ailp->xa_lock);
163 spin_unlock(&ailp->xa_lock);
167 xfs_trans_ail_copy_lsn(
168 struct xfs_ail *ailp,
172 ASSERT(sizeof(xfs_lsn_t) == 8);
176 #endif /* __XFS_TRANS_PRIV_H__ */