fs/btrfs/async-thread.h

   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(const struct btrfs_work *work);
  86 struct btrfs_fs_info *btrfs_workqueue_owner(const struct __btrfs_workqueue *wq);
  87 bool btrfs_workqueue_normal_congested(const struct btrfs_workqueue *wq);
  88 #endif