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 bool xfs_ail_delete_one(struct xfs_ail
*ailp
, struct xfs_log_item
*lip
);
110 void xfs_trans_ail_delete(struct xfs_ail
*ailp
, struct xfs_log_item
*lip
,
111 int shutdown_type
) __releases(ailp
->xa_lock
);
114 xfs_trans_ail_remove(
115 struct xfs_log_item
*lip
,
118 struct xfs_ail
*ailp
= lip
->li_ailp
;
120 spin_lock(&ailp
->xa_lock
);
121 /* xfs_trans_ail_delete() drops the AIL lock */
122 if (lip
->li_flags
& XFS_LI_IN_AIL
)
123 xfs_trans_ail_delete(ailp
, lip
, shutdown_type
);
125 spin_unlock(&ailp
->xa_lock
);
128 void xfs_ail_push(struct xfs_ail
*, xfs_lsn_t
);
129 void xfs_ail_push_all(struct xfs_ail
*);
130 void xfs_ail_push_all_sync(struct xfs_ail
*);
131 struct xfs_log_item
*xfs_ail_min(struct xfs_ail
*ailp
);
132 xfs_lsn_t
xfs_ail_min_lsn(struct xfs_ail
*ailp
);
134 struct xfs_log_item
* xfs_trans_ail_cursor_first(struct xfs_ail
*ailp
,
135 struct xfs_ail_cursor
*cur
,
137 struct xfs_log_item
* xfs_trans_ail_cursor_last(struct xfs_ail
*ailp
,
138 struct xfs_ail_cursor
*cur
,
140 struct xfs_log_item
* xfs_trans_ail_cursor_next(struct xfs_ail
*ailp
,
141 struct xfs_ail_cursor
*cur
);
142 void xfs_trans_ail_cursor_done(struct xfs_ail_cursor
*cur
);
144 #if BITS_PER_LONG != 64
146 xfs_trans_ail_copy_lsn(
147 struct xfs_ail
*ailp
,
151 ASSERT(sizeof(xfs_lsn_t
) == 8); /* don't lock if it shrinks */
152 spin_lock(&ailp
->xa_lock
);
154 spin_unlock(&ailp
->xa_lock
);
158 xfs_trans_ail_copy_lsn(
159 struct xfs_ail
*ailp
,
163 ASSERT(sizeof(xfs_lsn_t
) == 8);
170 struct xfs_log_item
*lip
)
172 struct xfs_buf
*bp
= lip
->li_buf
;
174 ASSERT(lip
->li_flags
& XFS_LI_IN_AIL
);
175 lockdep_assert_held(&lip
->li_ailp
->xa_lock
);
177 if (lip
->li_flags
& XFS_LI_FAILED
) {
178 lip
->li_flags
&= ~XFS_LI_FAILED
;
186 struct xfs_log_item
*lip
,
189 lockdep_assert_held(&lip
->li_ailp
->xa_lock
);
191 if (!(lip
->li_flags
& XFS_LI_FAILED
)) {
193 lip
->li_flags
|= XFS_LI_FAILED
;
198 #endif /* __XFS_TRANS_PRIV_H__ */