projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 4e0cc29b DW |
1 | /* |
| 2 | * Copyright (C) 2016 Oracle. All Rights Reserved. | |
| 3 | * | |
| 4 | * Author: Darrick J. Wong <darrick.wong@oracle.com> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License | |
| 8 | * as published by the Free Software Foundation; either version 2 | |
| 9 | * of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it would be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program; if not, write the Free Software Foundation, | |
| 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
| 19 | */ | |
| 20 | #ifndef __XFS_DEFER_H__ | |
| 21 | #define __XFS_DEFER_H__ | |
| 22 | ||
| 23 | struct xfs_defer_op_type; | |
| 24 | ||
| 25 | /* | |
| 26 | * Save a log intent item and a list of extents, so that we can replay | |
| 27 | * whatever action had to happen to the extent list and file the log done | |
| 28 | * item. | |
| 29 | */ | |
| 30 | struct xfs_defer_pending { | |
| 31 | const struct xfs_defer_op_type *dfp_type; /* function pointers */ | |
| 32 | struct list_head dfp_list; /* pending items */ | |
| 4e0cc29b | 33 | void *dfp_intent; /* log intent item */ |
| ea78d808 | 34 | void *dfp_done; /* log done item */ |
| 4e0cc29b DW |
35 | struct list_head dfp_work; /* work items */ |
| 36 | unsigned int dfp_count; /* # extent items */ | |
| 37 | }; | |
| 38 | ||
| 39 | /* | |
| 40 | * Header for deferred operation list. | |
| 41 | * | |
| 42 | * dop_low is used by the allocator to activate the lowspace algorithm - | |
| 43 | * when free space is running low the extent allocator may choose to | |
| 44 | * allocate an extent from an AG without leaving sufficient space for | |
| 45 | * a btree split when inserting the new extent. In this case the allocator | |
| 46 | * will enable the lowspace algorithm which is supposed to allow further | |
| 47 | * allocations (such as btree splits and newroots) to allocate from | |
| 48 | * sequential AGs. In order to avoid locking AGs out of order the lowspace | |
| 49 | * algorithm will start searching for free space from AG 0. If the correct | |
| 50 | * transaction reservations have been made then this algorithm will eventually | |
| 51 | * find all the space it needs. | |
| 52 | */ | |
| 53 | enum xfs_defer_ops_type { | |
| f8dbebef | 54 | XFS_DEFER_OPS_TYPE_RMAP, |
| 9749fee8 | 55 | XFS_DEFER_OPS_TYPE_FREE, |
| 4e0cc29b DW |
56 | XFS_DEFER_OPS_TYPE_MAX, |
| 57 | }; | |
| 58 | ||
| 59 | #define XFS_DEFER_OPS_NR_INODES 2 /* join up to two inodes */ | |
| 60 | ||
| 61 | struct xfs_defer_ops { | |
| 62 | bool dop_committed; /* did any trans commit? */ | |
| 63 | bool dop_low; /* alloc in low mode */ | |
| 64 | struct list_head dop_intake; /* unlogged pending work */ | |
| 65 | struct list_head dop_pending; /* logged pending work */ | |
| 66 | ||
| 67 | /* relog these inodes with each roll */ | |
| 68 | struct xfs_inode *dop_inodes[XFS_DEFER_OPS_NR_INODES]; | |
| 69 | }; | |
| 70 | ||
| 71 | void xfs_defer_add(struct xfs_defer_ops *dop, enum xfs_defer_ops_type type, | |
| 72 | struct list_head *h); | |
| 73 | int xfs_defer_finish(struct xfs_trans **tp, struct xfs_defer_ops *dop, | |
| 74 | struct xfs_inode *ip); | |
| 75 | void xfs_defer_cancel(struct xfs_defer_ops *dop); | |
| 76 | void xfs_defer_init(struct xfs_defer_ops *dop, xfs_fsblock_t *fbp); | |
| 77 | bool xfs_defer_has_unfinished_work(struct xfs_defer_ops *dop); | |
| 78 | int xfs_defer_join(struct xfs_defer_ops *dop, struct xfs_inode *ip); | |
| 79 | ||
| 80 | /* Description of a deferred type. */ | |
| 81 | struct xfs_defer_op_type { | |
| 82 | enum xfs_defer_ops_type type; | |
| 83 | unsigned int max_items; | |
| 84 | void (*abort_intent)(void *); | |
| 85 | void *(*create_done)(struct xfs_trans *, void *, unsigned int); | |
| 86 | int (*finish_item)(struct xfs_trans *, struct xfs_defer_ops *, | |
| 87 | struct list_head *, void *, void **); | |
| 88 | void (*finish_cleanup)(struct xfs_trans *, void *, int); | |
| 89 | void (*cancel_item)(struct list_head *); | |
| 90 | int (*diff_items)(void *, struct list_head *, struct list_head *); | |
| 91 | void *(*create_intent)(struct xfs_trans *, uint); | |
| 92 | void (*log_item)(struct xfs_trans *, void *, struct list_head *); | |
| 93 | }; | |
| 94 | ||
| 95 | void xfs_defer_init_op_type(const struct xfs_defer_op_type *type); | |
| 96 | ||
| 97 | #endif /* __XFS_DEFER_H__ */ |