mirror of
https://github.com/schoebel/mars
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112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
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/*
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* MARS Long Distance Replication Software
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*
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* This file is part of MARS project: http://schoebel.github.io/mars/
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*
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* Copyright (C) 2010-2014 Thomas Schoebel-Theuer
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* Copyright (C) 2011-2014 1&1 Internet AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MARS_QIO_H
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#define MARS_QIO_H
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#include <linux/fs.h>
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#include "lib_qio_rw.h"
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#include "lib_mapfree.h"
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#define QIO_IO_R_MAX_LATENCY 50000 // 50 ms
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#define QIO_IO_W_MAX_LATENCY 150000 // 150 ms
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extern int mars_qio_hang_timeout_s;
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struct qio_anchors {
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struct mutex prio_mutex;
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struct list_head submitted_list;
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wait_queue_head_t event;
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struct task_struct *thread;
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struct qio_brick *brick;
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int anch_prio;
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bool should_wake_now;
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bool should_terminate;
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bool has_terminated;
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bool all_have_expired;
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};
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struct qio_mref_aspect {
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GENERIC_ASPECT(mref);
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struct list_head io_head;
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struct lamport_time started_stamp;
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struct lamport_time enqueue_stamp;
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struct lamport_time dequeue_stamp;
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struct lamport_time completion_stamp;
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struct qio_anchors *anch;
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struct qio_rw qio_rw;
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int alloc_len;
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int qio_error;
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int nr_requeue;
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bool do_dealloc;
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bool is_write;
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bool is_active;
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bool use_nowait;
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bool has_expired;
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};
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struct qio_brick {
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MARS_BRICK(qio);
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/* in parameters */
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bool o_creat;
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/* out parameters */
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int error;
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/* private */
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struct file *file;
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struct mapfree_info *mf;
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struct qio_anchors thread_anch[2];
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/* statistics */
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struct lamport_time last_started_stamp;
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struct lamport_time last_submitted_stamp;
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#ifdef CONFIG_MARS_DEBUG
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struct lamport_time last_dequeue_stamp;
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#endif
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struct lamport_time last_completion_stamp;
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struct lamport_time last_hanging_stamp;
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atomic_t flying_reads;
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atomic_t flying_writes;
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#ifdef CONFIG_MARS_DEBUG
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loff_t submit_pos;
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loff_t complet_pos;
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int submit_len;
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int complet_len;
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#endif
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};
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struct qio_input {
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MARS_INPUT(qio);
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/* parameters */
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/* private */
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};
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struct qio_output {
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MARS_OUTPUT(qio);
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/* parameters */
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/* private */
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};
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MARS_TYPES(qio);
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#endif
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