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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_TRANS_PRIV_H__ | |
19 | #define __XFS_TRANS_PRIV_H__ | |
20 | ||
21 | struct xfs_log_item; | |
22 | struct xfs_log_item_desc; | |
23 | struct xfs_mount; | |
24 | struct xfs_trans; | |
25 | ||
e98c414f CH |
26 | void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *); |
27 | void xfs_trans_del_item(struct xfs_log_item *); | |
d17c701c DC |
28 | void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn, |
29 | int flags); | |
71e330b5 DC |
30 | void xfs_trans_item_committed(struct xfs_log_item *lip, |
31 | xfs_lsn_t commit_lsn, int aborted); | |
32 | void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp); | |
1da177e4 LT |
33 | |
34 | /* | |
27d8d5fe DC |
35 | * AIL traversal cursor. |
36 | * | |
37 | * Rather than using a generation number for detecting changes in the ail, use | |
38 | * a cursor that is protected by the ail lock. The aild cursor exists in the | |
39 | * struct xfs_ail, but other traversals can declare it on the stack and link it | |
40 | * to the ail list. | |
41 | * | |
42 | * When an object is deleted from or moved int the AIL, the cursor list is | |
43 | * searched to see if the object is a designated cursor item. If it is, it is | |
44 | * deleted from the cursor so that the next time the cursor is used traversal | |
45 | * will return to the start. | |
46 | * | |
47 | * This means a traversal colliding with a removal will cause a restart of the | |
48 | * list scan, rather than any insertion or deletion anywhere in the list. The | |
49 | * low bit of the item pointer is set if the cursor has been invalidated so | |
50 | * that we can tell the difference between invalidation and reaching the end | |
51 | * of the list to trigger traversal restarts. | |
1da177e4 | 52 | */ |
27d8d5fe DC |
53 | struct xfs_ail_cursor { |
54 | struct xfs_ail_cursor *next; | |
55 | struct xfs_log_item *item; | |
56 | }; | |
1da177e4 | 57 | |
249a8c11 | 58 | /* |
27d8d5fe DC |
59 | * Private AIL structures. |
60 | * | |
61 | * Eventually we need to drive the locking in here as well. | |
249a8c11 | 62 | */ |
82fa9012 DC |
63 | struct xfs_ail { |
64 | struct xfs_mount *xa_mount; | |
65 | struct list_head xa_ail; | |
66 | uint xa_gen; | |
67 | struct task_struct *xa_task; | |
68 | xfs_lsn_t xa_target; | |
27d8d5fe | 69 | struct xfs_ail_cursor xa_cursors; |
c7e8f268 | 70 | spinlock_t xa_lock; |
82fa9012 DC |
71 | }; |
72 | ||
27d8d5fe DC |
73 | /* |
74 | * From xfs_trans_ail.c | |
75 | */ | |
783a2f65 DC |
76 | void xfs_trans_ail_update(struct xfs_ail *ailp, |
77 | struct xfs_log_item *lip, xfs_lsn_t lsn) | |
78 | __releases(ailp->xa_lock); | |
79 | void xfs_trans_ail_delete(struct xfs_ail *ailp, | |
80 | struct xfs_log_item *lip) | |
81 | __releases(ailp->xa_lock); | |
82 | void xfs_trans_ail_push(struct xfs_ail *, xfs_lsn_t); | |
83 | void xfs_trans_unlocked_item(struct xfs_ail *, | |
84 | xfs_log_item_t *); | |
27d8d5fe | 85 | |
5b00f14f DC |
86 | xfs_lsn_t xfs_trans_ail_tail(struct xfs_ail *ailp); |
87 | ||
88 | struct xfs_log_item *xfs_trans_ail_cursor_first(struct xfs_ail *ailp, | |
89 | struct xfs_ail_cursor *cur, | |
90 | xfs_lsn_t lsn); | |
91 | struct xfs_log_item *xfs_trans_ail_cursor_next(struct xfs_ail *ailp, | |
27d8d5fe | 92 | struct xfs_ail_cursor *cur); |
5b00f14f | 93 | void xfs_trans_ail_cursor_done(struct xfs_ail *ailp, |
27d8d5fe DC |
94 | struct xfs_ail_cursor *cur); |
95 | ||
82fa9012 DC |
96 | long xfsaild_push(struct xfs_ail *, xfs_lsn_t *); |
97 | void xfsaild_wakeup(struct xfs_ail *, xfs_lsn_t); | |
98 | int xfsaild_start(struct xfs_ail *); | |
99 | void xfsaild_stop(struct xfs_ail *); | |
249a8c11 | 100 | |
7b2e2a31 DC |
101 | #if BITS_PER_LONG != 64 |
102 | static inline void | |
103 | xfs_trans_ail_copy_lsn( | |
104 | struct xfs_ail *ailp, | |
105 | xfs_lsn_t *dst, | |
106 | xfs_lsn_t *src) | |
107 | { | |
108 | ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */ | |
c7e8f268 | 109 | spin_lock(&ailp->xa_lock); |
7b2e2a31 | 110 | *dst = *src; |
c7e8f268 | 111 | spin_unlock(&ailp->xa_lock); |
7b2e2a31 DC |
112 | } |
113 | #else | |
114 | static inline void | |
115 | xfs_trans_ail_copy_lsn( | |
116 | struct xfs_ail *ailp, | |
117 | xfs_lsn_t *dst, | |
118 | xfs_lsn_t *src) | |
119 | { | |
120 | ASSERT(sizeof(xfs_lsn_t) == 8); | |
121 | *dst = *src; | |
122 | } | |
123 | #endif | |
1da177e4 | 124 | #endif /* __XFS_TRANS_PRIV_H__ */ |