| /* |
| * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #ifndef __XFS_TRANS_PRIV_H__ |
| #define __XFS_TRANS_PRIV_H__ |
| |
| struct xfs_log_item; |
| struct xfs_log_item_desc; |
| struct xfs_mount; |
| struct xfs_trans; |
| struct xfs_ail; |
| struct xfs_log_vec; |
| |
| void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *); |
| void xfs_trans_del_item(struct xfs_log_item *); |
| void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn, |
| int flags); |
| void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp); |
| |
| void xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv, |
| xfs_lsn_t commit_lsn, int aborted); |
| /* |
| * AIL traversal cursor. |
| * |
| * Rather than using a generation number for detecting changes in the ail, use |
| * a cursor that is protected by the ail lock. The aild cursor exists in the |
| * struct xfs_ail, but other traversals can declare it on the stack and link it |
| * to the ail list. |
| * |
| * When an object is deleted from or moved int the AIL, the cursor list is |
| * searched to see if the object is a designated cursor item. If it is, it is |
| * deleted from the cursor so that the next time the cursor is used traversal |
| * will return to the start. |
| * |
| * This means a traversal colliding with a removal will cause a restart of the |
| * list scan, rather than any insertion or deletion anywhere in the list. The |
| * low bit of the item pointer is set if the cursor has been invalidated so |
| * that we can tell the difference between invalidation and reaching the end |
| * of the list to trigger traversal restarts. |
| */ |
| struct xfs_ail_cursor { |
| struct list_head list; |
| struct xfs_log_item *item; |
| }; |
| |
| /* |
| * Private AIL structures. |
| * |
| * Eventually we need to drive the locking in here as well. |
| */ |
| struct xfs_ail { |
| struct xfs_mount *xa_mount; |
| struct task_struct *xa_task; |
| struct list_head xa_ail; |
| xfs_lsn_t xa_target; |
| struct list_head xa_cursors; |
| spinlock_t xa_lock; |
| xfs_lsn_t xa_last_pushed_lsn; |
| int xa_log_flush; |
| struct list_head xa_buf_list; |
| wait_queue_head_t xa_empty; |
| }; |
| |
| /* |
| * From xfs_trans_ail.c |
| */ |
| void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, |
| struct xfs_ail_cursor *cur, |
| struct xfs_log_item **log_items, int nr_items, |
| xfs_lsn_t lsn) __releases(ailp->xa_lock); |
| static inline void |
| xfs_trans_ail_update( |
| struct xfs_ail *ailp, |
| struct xfs_log_item *lip, |
| xfs_lsn_t lsn) __releases(ailp->xa_lock) |
| { |
| xfs_trans_ail_update_bulk(ailp, NULL, &lip, 1, lsn); |
| } |
| |
| void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp, |
| struct xfs_log_item **log_items, int nr_items) |
| __releases(ailp->xa_lock); |
| static inline void |
| xfs_trans_ail_delete( |
| struct xfs_ail *ailp, |
| xfs_log_item_t *lip) __releases(ailp->xa_lock) |
| { |
| xfs_trans_ail_delete_bulk(ailp, &lip, 1); |
| } |
| |
| void xfs_ail_push(struct xfs_ail *, xfs_lsn_t); |
| void xfs_ail_push_all(struct xfs_ail *); |
| void xfs_ail_push_all_sync(struct xfs_ail *); |
| struct xfs_log_item *xfs_ail_min(struct xfs_ail *ailp); |
| xfs_lsn_t xfs_ail_min_lsn(struct xfs_ail *ailp); |
| |
| struct xfs_log_item * xfs_trans_ail_cursor_first(struct xfs_ail *ailp, |
| struct xfs_ail_cursor *cur, |
| xfs_lsn_t lsn); |
| struct xfs_log_item * xfs_trans_ail_cursor_last(struct xfs_ail *ailp, |
| struct xfs_ail_cursor *cur, |
| xfs_lsn_t lsn); |
| struct xfs_log_item * xfs_trans_ail_cursor_next(struct xfs_ail *ailp, |
| struct xfs_ail_cursor *cur); |
| void xfs_trans_ail_cursor_done(struct xfs_ail *ailp, |
| struct xfs_ail_cursor *cur); |
| |
| #if BITS_PER_LONG != 64 |
| static inline void |
| xfs_trans_ail_copy_lsn( |
| struct xfs_ail *ailp, |
| xfs_lsn_t *dst, |
| xfs_lsn_t *src) |
| { |
| ASSERT(sizeof(xfs_lsn_t) == 8); /* don't lock if it shrinks */ |
| spin_lock(&ailp->xa_lock); |
| *dst = *src; |
| spin_unlock(&ailp->xa_lock); |
| } |
| #else |
| static inline void |
| xfs_trans_ail_copy_lsn( |
| struct xfs_ail *ailp, |
| xfs_lsn_t *dst, |
| xfs_lsn_t *src) |
| { |
| ASSERT(sizeof(xfs_lsn_t) == 8); |
| *dst = *src; |
| } |
| #endif |
| #endif /* __XFS_TRANS_PRIV_H__ */ |