Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 25 | struct xfs_ail; |
| 26 | struct xfs_log_vec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
Christoph Hellwig | e98c414 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 28 | void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *); |
| 29 | void xfs_trans_del_item(struct xfs_log_item *); |
Dave Chinner | d17c701 | 2010-08-24 11:42:52 +1000 | [diff] [blame] | 30 | void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn, |
| 31 | int flags); |
Dave Chinner | 71e330b | 2010-05-21 14:37:18 +1000 | [diff] [blame] | 32 | void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Dave Chinner | 0e57f6a | 2010-12-20 12:02:19 +1100 | [diff] [blame] | 34 | void xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv, |
| 35 | xfs_lsn_t commit_lsn, int aborted); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | /* |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 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. |
| 54 | */ |
| 55 | struct xfs_ail_cursor { |
Dave Chinner | af3e402 | 2011-07-18 03:40:18 +0000 | [diff] [blame] | 56 | struct list_head list; |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 57 | struct xfs_log_item *item; |
| 58 | }; |
| 59 | |
| 60 | /* |
| 61 | * Private AIL structures. |
| 62 | * |
| 63 | * Eventually we need to drive the locking in here as well. |
| 64 | */ |
| 65 | struct xfs_ail { |
| 66 | struct xfs_mount *xa_mount; |
Christoph Hellwig | 0030807 | 2011-10-11 11:14:10 -0400 | [diff] [blame] | 67 | struct task_struct *xa_task; |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 68 | struct list_head xa_ail; |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 69 | xfs_lsn_t xa_target; |
Dave Chinner | af3e402 | 2011-07-18 03:40:18 +0000 | [diff] [blame] | 70 | struct list_head xa_cursors; |
David Chinner | c7e8f26 | 2008-10-30 17:39:23 +1100 | [diff] [blame] | 71 | spinlock_t xa_lock; |
Dave Chinner | 0bf6a5b | 2011-04-08 12:45:07 +1000 | [diff] [blame] | 72 | xfs_lsn_t xa_last_pushed_lsn; |
Dave Chinner | 670ce93 | 2011-09-30 04:45:03 +0000 | [diff] [blame] | 73 | int xa_log_flush; |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 74 | wait_queue_head_t xa_empty; |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 75 | }; |
| 76 | |
| 77 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | * From xfs_trans_ail.c |
| 79 | */ |
Dave Chinner | e605994 | 2010-12-20 12:34:26 +1100 | [diff] [blame] | 80 | void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 81 | struct xfs_ail_cursor *cur, |
Dave Chinner | e605994 | 2010-12-20 12:34:26 +1100 | [diff] [blame] | 82 | struct xfs_log_item **log_items, int nr_items, |
| 83 | xfs_lsn_t lsn) __releases(ailp->xa_lock); |
| 84 | static inline void |
| 85 | xfs_trans_ail_update( |
| 86 | struct xfs_ail *ailp, |
| 87 | struct xfs_log_item *lip, |
| 88 | xfs_lsn_t lsn) __releases(ailp->xa_lock) |
| 89 | { |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 90 | xfs_trans_ail_update_bulk(ailp, NULL, &lip, 1, lsn); |
Dave Chinner | e605994 | 2010-12-20 12:34:26 +1100 | [diff] [blame] | 91 | } |
| 92 | |
Dave Chinner | 9552e7f | 2010-12-20 12:36:15 +1100 | [diff] [blame] | 93 | void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp, |
| 94 | struct xfs_log_item **log_items, int nr_items) |
| 95 | __releases(ailp->xa_lock); |
| 96 | static inline void |
| 97 | xfs_trans_ail_delete( |
| 98 | struct xfs_ail *ailp, |
| 99 | xfs_log_item_t *lip) __releases(ailp->xa_lock) |
| 100 | { |
| 101 | xfs_trans_ail_delete_bulk(ailp, &lip, 1); |
| 102 | } |
| 103 | |
Dave Chinner | fd07484 | 2011-04-08 12:45:07 +1000 | [diff] [blame] | 104 | void xfs_ail_push(struct xfs_ail *, xfs_lsn_t); |
| 105 | void xfs_ail_push_all(struct xfs_ail *); |
Christoph Hellwig | 211e4d4 | 2012-04-23 15:58:34 +1000 | [diff] [blame] | 106 | void xfs_ail_push_all_sync(struct xfs_ail *); |
Christoph Hellwig | 1c30462 | 2012-04-23 15:58:33 +1000 | [diff] [blame] | 107 | struct xfs_log_item *xfs_ail_min(struct xfs_ail *ailp); |
Dave Chinner | fd07484 | 2011-04-08 12:45:07 +1000 | [diff] [blame] | 108 | xfs_lsn_t xfs_ail_min_lsn(struct xfs_ail *ailp); |
| 109 | |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 110 | struct xfs_log_item * xfs_trans_ail_cursor_first(struct xfs_ail *ailp, |
David Chinner | 5b00f14 | 2008-10-30 17:39:00 +1100 | [diff] [blame] | 111 | struct xfs_ail_cursor *cur, |
| 112 | xfs_lsn_t lsn); |
Dave Chinner | 1d8c95a | 2011-07-18 03:40:16 +0000 | [diff] [blame] | 113 | struct xfs_log_item * xfs_trans_ail_cursor_last(struct xfs_ail *ailp, |
| 114 | struct xfs_ail_cursor *cur, |
| 115 | xfs_lsn_t lsn); |
| 116 | struct xfs_log_item * xfs_trans_ail_cursor_next(struct xfs_ail *ailp, |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 117 | struct xfs_ail_cursor *cur); |
David Chinner | 5b00f14 | 2008-10-30 17:39:00 +1100 | [diff] [blame] | 118 | void xfs_trans_ail_cursor_done(struct xfs_ail *ailp, |
David Chinner | 27d8d5f | 2008-10-30 17:38:39 +1100 | [diff] [blame] | 119 | struct xfs_ail_cursor *cur); |
David Chinner | 82fa901 | 2008-10-30 17:38:26 +1100 | [diff] [blame] | 120 | |
David Chinner | 7b2e2a3 | 2008-10-30 17:39:12 +1100 | [diff] [blame] | 121 | #if BITS_PER_LONG != 64 |
| 122 | static inline void |
| 123 | xfs_trans_ail_copy_lsn( |
| 124 | struct xfs_ail *ailp, |
| 125 | xfs_lsn_t *dst, |
| 126 | xfs_lsn_t *src) |
| 127 | { |
| 128 | ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */ |
David Chinner | c7e8f26 | 2008-10-30 17:39:23 +1100 | [diff] [blame] | 129 | spin_lock(&ailp->xa_lock); |
David Chinner | 7b2e2a3 | 2008-10-30 17:39:12 +1100 | [diff] [blame] | 130 | *dst = *src; |
David Chinner | c7e8f26 | 2008-10-30 17:39:23 +1100 | [diff] [blame] | 131 | spin_unlock(&ailp->xa_lock); |
David Chinner | 7b2e2a3 | 2008-10-30 17:39:12 +1100 | [diff] [blame] | 132 | } |
| 133 | #else |
| 134 | static inline void |
| 135 | xfs_trans_ail_copy_lsn( |
| 136 | struct xfs_ail *ailp, |
| 137 | xfs_lsn_t *dst, |
| 138 | xfs_lsn_t *src) |
| 139 | { |
| 140 | ASSERT(sizeof(xfs_lsn_t) == 8); |
| 141 | *dst = *src; |
| 142 | } |
| 143 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | #endif /* __XFS_TRANS_PRIV_H__ */ |