1 /* 2 * Copyright (C) 2007 Oracle. All rights reserved. 3 * Copyright (C) 2014 Fujitsu. All rights reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public 7 * License v2 as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public 15 * License along with this program; if not, write to the 16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 17 * Boston, MA 021110-1307, USA. 18 */ 19 20 #ifndef __BTRFS_ASYNC_THREAD_ 21 #define __BTRFS_ASYNC_THREAD_ 22 #include <linux/workqueue.h> 23 24 struct btrfs_fs_info; 25 struct btrfs_workqueue; 26 /* Internal use only */ 27 struct __btrfs_workqueue; 28 struct btrfs_work; 29 typedef void (*btrfs_func_t)(struct btrfs_work *arg); 30 typedef void (*btrfs_work_func_t)(struct work_struct *arg); 31 32 struct btrfs_work { 33 btrfs_func_t func; 34 btrfs_func_t ordered_func; 35 btrfs_func_t ordered_free; 36 37 /* Don't touch things below */ 38 struct work_struct normal_work; 39 struct list_head ordered_list; 40 struct __btrfs_workqueue *wq; 41 unsigned long flags; 42 }; 43 44 #define BTRFS_WORK_HELPER_PROTO(name) \ 45 void btrfs_##name(struct work_struct *arg) 46 47 BTRFS_WORK_HELPER_PROTO(worker_helper); 48 BTRFS_WORK_HELPER_PROTO(delalloc_helper); 49 BTRFS_WORK_HELPER_PROTO(flush_delalloc_helper); 50 BTRFS_WORK_HELPER_PROTO(cache_helper); 51 BTRFS_WORK_HELPER_PROTO(submit_helper); 52 BTRFS_WORK_HELPER_PROTO(fixup_helper); 53 BTRFS_WORK_HELPER_PROTO(endio_helper); 54 BTRFS_WORK_HELPER_PROTO(endio_meta_helper); 55 BTRFS_WORK_HELPER_PROTO(endio_meta_write_helper); 56 BTRFS_WORK_HELPER_PROTO(endio_raid56_helper); 57 BTRFS_WORK_HELPER_PROTO(endio_repair_helper); 58 BTRFS_WORK_HELPER_PROTO(rmw_helper); 59 BTRFS_WORK_HELPER_PROTO(endio_write_helper); 60 BTRFS_WORK_HELPER_PROTO(freespace_write_helper); 61 BTRFS_WORK_HELPER_PROTO(delayed_meta_helper); 62 BTRFS_WORK_HELPER_PROTO(readahead_helper); 63 BTRFS_WORK_HELPER_PROTO(qgroup_rescan_helper); 64 BTRFS_WORK_HELPER_PROTO(extent_refs_helper); 65 BTRFS_WORK_HELPER_PROTO(scrub_helper); 66 BTRFS_WORK_HELPER_PROTO(scrubwrc_helper); 67 BTRFS_WORK_HELPER_PROTO(scrubnc_helper); 68 BTRFS_WORK_HELPER_PROTO(scrubparity_helper); 69 70 71 struct btrfs_workqueue *btrfs_alloc_workqueue(struct btrfs_fs_info *fs_info, 72 const char *name, 73 unsigned int flags, 74 int limit_active, 75 int thresh); 76 void btrfs_init_work(struct btrfs_work *work, btrfs_work_func_t helper, 77 btrfs_func_t func, 78 btrfs_func_t ordered_func, 79 btrfs_func_t ordered_free); 80 void btrfs_queue_work(struct btrfs_workqueue *wq, 81 struct btrfs_work *work); 82 void btrfs_destroy_workqueue(struct btrfs_workqueue *wq); 83 void btrfs_workqueue_set_max(struct btrfs_workqueue *wq, int max); 84 void btrfs_set_work_high_priority(struct btrfs_work *work); 85 struct btrfs_fs_info *btrfs_work_owner(struct btrfs_work *work); 86 struct btrfs_fs_info *btrfs_workqueue_owner(struct __btrfs_workqueue *wq); 87 bool btrfs_workqueue_normal_congested(struct btrfs_workqueue *wq); 88 #endif 89