1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
6 #ifndef __XFS_TRANS_PRIV_H__
7 #define __XFS_TRANS_PRIV_H__
16 void xfs_trans_init(struct xfs_mount *);
17 void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *);
18 void xfs_trans_del_item(struct xfs_log_item *);
19 void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn,
21 void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp);
23 void xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv,
24 xfs_lsn_t commit_lsn, int aborted);
26 * AIL traversal cursor.
28 * Rather than using a generation number for detecting changes in the ail, use
29 * a cursor that is protected by the ail lock. The aild cursor exists in the
30 * struct xfs_ail, but other traversals can declare it on the stack and link it
33 * When an object is deleted from or moved int the AIL, the cursor list is
34 * searched to see if the object is a designated cursor item. If it is, it is
35 * deleted from the cursor so that the next time the cursor is used traversal
36 * will return to the start.
38 * This means a traversal colliding with a removal will cause a restart of the
39 * list scan, rather than any insertion or deletion anywhere in the list. The
40 * low bit of the item pointer is set if the cursor has been invalidated so
41 * that we can tell the difference between invalidation and reaching the end
42 * of the list to trigger traversal restarts.
44 struct xfs_ail_cursor {
45 struct list_head list;
46 struct xfs_log_item *item;
50 * Private AIL structures.
52 * Eventually we need to drive the locking in here as well.
55 struct xfs_mount *ail_mount;
56 struct task_struct *ail_task;
57 struct list_head ail_head;
59 xfs_lsn_t ail_target_prev;
60 struct list_head ail_cursors;
62 xfs_lsn_t ail_last_pushed_lsn;
64 struct list_head ail_buf_list;
65 wait_queue_head_t ail_empty;
69 * From xfs_trans_ail.c
71 void xfs_trans_ail_update_bulk(struct xfs_ail *ailp,
72 struct xfs_ail_cursor *cur,
73 struct xfs_log_item **log_items, int nr_items,
74 xfs_lsn_t lsn) __releases(ailp->ail_lock);
76 * Return a pointer to the first item in the AIL. If the AIL is empty, then
79 static inline struct xfs_log_item *
83 return list_first_entry_or_null(&ailp->ail_head, struct xfs_log_item,
90 struct xfs_log_item *lip,
91 xfs_lsn_t lsn) __releases(ailp->ail_lock)
93 xfs_trans_ail_update_bulk(ailp, NULL, &lip, 1, lsn);
96 bool xfs_ail_delete_one(struct xfs_ail *ailp, struct xfs_log_item *lip);
97 void xfs_trans_ail_delete(struct xfs_ail *ailp, struct xfs_log_item *lip,
98 int shutdown_type) __releases(ailp->ail_lock);
101 xfs_trans_ail_remove(
102 struct xfs_log_item *lip,
105 struct xfs_ail *ailp = lip->li_ailp;
107 spin_lock(&ailp->ail_lock);
108 /* xfs_trans_ail_delete() drops the AIL lock */
109 if (test_bit(XFS_LI_IN_AIL, &lip->li_flags))
110 xfs_trans_ail_delete(ailp, lip, shutdown_type);
112 spin_unlock(&ailp->ail_lock);
115 void xfs_ail_push(struct xfs_ail *, xfs_lsn_t);
116 void xfs_ail_push_all(struct xfs_ail *);
117 void xfs_ail_push_all_sync(struct xfs_ail *);
118 struct xfs_log_item *xfs_ail_min(struct xfs_ail *ailp);
119 xfs_lsn_t xfs_ail_min_lsn(struct xfs_ail *ailp);
121 struct xfs_log_item * xfs_trans_ail_cursor_first(struct xfs_ail *ailp,
122 struct xfs_ail_cursor *cur,
124 struct xfs_log_item * xfs_trans_ail_cursor_last(struct xfs_ail *ailp,
125 struct xfs_ail_cursor *cur,
127 struct xfs_log_item * xfs_trans_ail_cursor_next(struct xfs_ail *ailp,
128 struct xfs_ail_cursor *cur);
129 void xfs_trans_ail_cursor_done(struct xfs_ail_cursor *cur);
131 #if BITS_PER_LONG != 64
133 xfs_trans_ail_copy_lsn(
134 struct xfs_ail *ailp,
138 ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */
139 spin_lock(&ailp->ail_lock);
141 spin_unlock(&ailp->ail_lock);
145 xfs_trans_ail_copy_lsn(
146 struct xfs_ail *ailp,
150 ASSERT(sizeof(xfs_lsn_t) == 8);
157 struct xfs_log_item *lip)
159 struct xfs_buf *bp = lip->li_buf;
161 ASSERT(test_bit(XFS_LI_IN_AIL, &lip->li_flags));
162 lockdep_assert_held(&lip->li_ailp->ail_lock);
164 if (test_and_clear_bit(XFS_LI_FAILED, &lip->li_flags)) {
172 struct xfs_log_item *lip,
175 lockdep_assert_held(&lip->li_ailp->ail_lock);
177 if (!test_and_set_bit(XFS_LI_FAILED, &lip->li_flags)) {
183 #endif /* __XFS_TRANS_PRIV_H__ */