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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; | |
0e57f6a3 DC |
25 | struct xfs_ail; |
26 | struct xfs_log_vec; | |
1da177e4 | 27 | |
e98c414f CH |
28 | void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *); |
29 | void xfs_trans_del_item(struct xfs_log_item *); | |
d17c701c DC |
30 | void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn, |
31 | int flags); | |
71e330b5 | 32 | void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp); |
1da177e4 | 33 | |
0e57f6a3 DC |
34 | void xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv, |
35 | xfs_lsn_t commit_lsn, int aborted); | |
1da177e4 | 36 | /* |
27d8d5fe DC |
37 | * AIL traversal cursor. |
38 | * | |
39 | * Rather than using a generation number for detecting changes in the ail, use | |
40 | * a cursor that is protected by the ail lock. The aild cursor exists in the | |
41 | * struct xfs_ail, but other traversals can declare it on the stack and link it | |
42 | * to the ail list. | |
43 | * | |
44 | * When an object is deleted from or moved int the AIL, the cursor list is | |
45 | * searched to see if the object is a designated cursor item. If it is, it is | |
46 | * deleted from the cursor so that the next time the cursor is used traversal | |
47 | * will return to the start. | |
48 | * | |
49 | * This means a traversal colliding with a removal will cause a restart of the | |
50 | * list scan, rather than any insertion or deletion anywhere in the list. The | |
51 | * low bit of the item pointer is set if the cursor has been invalidated so | |
52 | * that we can tell the difference between invalidation and reaching the end | |
53 | * of the list to trigger traversal restarts. | |
1da177e4 | 54 | */ |
27d8d5fe DC |
55 | struct xfs_ail_cursor { |
56 | struct xfs_ail_cursor *next; | |
57 | struct xfs_log_item *item; | |
58 | }; | |
1da177e4 | 59 | |
249a8c11 | 60 | /* |
27d8d5fe DC |
61 | * Private AIL structures. |
62 | * | |
63 | * Eventually we need to drive the locking in here as well. | |
249a8c11 | 64 | */ |
82fa9012 DC |
65 | struct xfs_ail { |
66 | struct xfs_mount *xa_mount; | |
67 | struct list_head xa_ail; | |
82fa9012 | 68 | xfs_lsn_t xa_target; |
27d8d5fe | 69 | struct xfs_ail_cursor xa_cursors; |
c7e8f268 | 70 | spinlock_t xa_lock; |
0bf6a5bd DC |
71 | struct delayed_work xa_work; |
72 | xfs_lsn_t xa_last_pushed_lsn; | |
73 | unsigned long xa_flags; | |
82fa9012 DC |
74 | }; |
75 | ||
0bf6a5bd DC |
76 | #define XFS_AIL_PUSHING_BIT 0 |
77 | ||
27d8d5fe DC |
78 | /* |
79 | * From xfs_trans_ail.c | |
80 | */ | |
0bf6a5bd DC |
81 | |
82 | extern struct workqueue_struct *xfs_ail_wq; /* AIL workqueue */ | |
83 | ||
e6059949 | 84 | void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, |
1d8c95a3 | 85 | struct xfs_ail_cursor *cur, |
e6059949 DC |
86 | struct xfs_log_item **log_items, int nr_items, |
87 | xfs_lsn_t lsn) __releases(ailp->xa_lock); | |
88 | static inline void | |
89 | xfs_trans_ail_update( | |
90 | struct xfs_ail *ailp, | |
91 | struct xfs_log_item *lip, | |
92 | xfs_lsn_t lsn) __releases(ailp->xa_lock) | |
93 | { | |
1d8c95a3 | 94 | xfs_trans_ail_update_bulk(ailp, NULL, &lip, 1, lsn); |
e6059949 DC |
95 | } |
96 | ||
9552e7f2 DC |
97 | void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp, |
98 | struct xfs_log_item **log_items, int nr_items) | |
99 | __releases(ailp->xa_lock); | |
100 | static inline void | |
101 | xfs_trans_ail_delete( | |
102 | struct xfs_ail *ailp, | |
103 | xfs_log_item_t *lip) __releases(ailp->xa_lock) | |
104 | { | |
105 | xfs_trans_ail_delete_bulk(ailp, &lip, 1); | |
106 | } | |
107 | ||
fd074841 DC |
108 | void xfs_ail_push(struct xfs_ail *, xfs_lsn_t); |
109 | void xfs_ail_push_all(struct xfs_ail *); | |
110 | xfs_lsn_t xfs_ail_min_lsn(struct xfs_ail *ailp); | |
111 | ||
783a2f65 DC |
112 | void xfs_trans_unlocked_item(struct xfs_ail *, |
113 | xfs_log_item_t *); | |
27d8d5fe | 114 | |
1d8c95a3 | 115 | struct xfs_log_item * xfs_trans_ail_cursor_first(struct xfs_ail *ailp, |
5b00f14f DC |
116 | struct xfs_ail_cursor *cur, |
117 | xfs_lsn_t lsn); | |
1d8c95a3 DC |
118 | struct xfs_log_item * xfs_trans_ail_cursor_last(struct xfs_ail *ailp, |
119 | struct xfs_ail_cursor *cur, | |
120 | xfs_lsn_t lsn); | |
121 | struct xfs_log_item * xfs_trans_ail_cursor_next(struct xfs_ail *ailp, | |
27d8d5fe | 122 | struct xfs_ail_cursor *cur); |
5b00f14f | 123 | void xfs_trans_ail_cursor_done(struct xfs_ail *ailp, |
27d8d5fe DC |
124 | struct xfs_ail_cursor *cur); |
125 | ||
7b2e2a31 DC |
126 | #if BITS_PER_LONG != 64 |
127 | static inline void | |
128 | xfs_trans_ail_copy_lsn( | |
129 | struct xfs_ail *ailp, | |
130 | xfs_lsn_t *dst, | |
131 | xfs_lsn_t *src) | |
132 | { | |
133 | ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */ | |
c7e8f268 | 134 | spin_lock(&ailp->xa_lock); |
7b2e2a31 | 135 | *dst = *src; |
c7e8f268 | 136 | spin_unlock(&ailp->xa_lock); |
7b2e2a31 DC |
137 | } |
138 | #else | |
139 | static inline void | |
140 | xfs_trans_ail_copy_lsn( | |
141 | struct xfs_ail *ailp, | |
142 | xfs_lsn_t *dst, | |
143 | xfs_lsn_t *src) | |
144 | { | |
145 | ASSERT(sizeof(xfs_lsn_t) == 8); | |
146 | *dst = *src; | |
147 | } | |
148 | #endif | |
1da177e4 | 149 | #endif /* __XFS_TRANS_PRIV_H__ */ |