mirror of https://github.com/schoebel/mars
450 lines
13 KiB
C
450 lines
13 KiB
C
/*
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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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//#define BRICK_DEBUGGING
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//#define MARS_DEBUGGING
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//#define IO_DEBUGGING
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/sysctl.h>
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#include <linux/uaccess.h>
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#include "strategy.h"
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#include "mars_proc.h"
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#include "../lib_mapfree.h"
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#include "../mars_bio.h"
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#include "../mars_aio.h"
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#include "../mars_if.h"
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#include "../mars_copy.h"
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#include "../mars_client.h"
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#include "../mars_server.h"
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#include "../mars_trans_logger.h"
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#include "../buildtag.h"
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const char mars_version_string[] = BUILDTAG " (" BUILDHOST " " BUILDDATE ") "
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#ifndef CONFIG_MARS_DEBUG
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"production"
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#else
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"DEBUG"
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#endif
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#ifdef CONFIG_MARS_DEBUG_MEM
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" BAD_PERFORMANCE"
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#endif
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#ifdef CONFIG_MARS_DEBUG_ORDER0
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" EVIL_PERFORMANCE"
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#endif
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;
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mars_info_fn mars_info = NULL;
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static
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void interpret_user_message(char *msg)
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{
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char cmd = msg[0];
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char *rest = msg + 1;
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while (*rest == ' ')
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rest++;
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switch (cmd) {
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case 'l': /* write to syslog via say logging */
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MARS_INF("%s\n", rest);
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break;
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case 'L': /* write to syslog via printk */
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printk("%s\n", rest);
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break;
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default:
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MARS_DBG("unknown user message '%s'\n", msg);
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}
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}
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static
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int trigger_sysctl_handler(
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struct ctl_table *table,
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int write,
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void __user *buffer,
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size_t *length,
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loff_t *ppos)
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{
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ssize_t res = 0;
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size_t len = *length;
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MARS_DBG("write = %d len = %ld pos = %lld\n", write, len, *ppos);
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if (len <= 0 || *ppos > 0) {
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goto done;
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}
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if (write) {
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char *tmp = brick_string_alloc(len + 1);
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res = len; // fake consumption of all data
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if (copy_from_user(tmp, buffer, len)) {
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MARS_ERR("cannot read %ld bytes from trigger\n", len);
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goto dealloc;
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}
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tmp[len] = '\0';
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if (tmp[0] == ' ' ||
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(tmp[0] >= '0' && tmp[0] <= '9')) {
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int code = 0;
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sscanf(tmp, "%d", &code);
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if (code > 0) {
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mars_trigger();
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}
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if (code > 1) {
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mars_remote_trigger();
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}
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} else {
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interpret_user_message(tmp);
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}
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dealloc:
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brick_string_free(tmp);
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} else {
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char *answer = "MARS module not operational\n";
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char *tmp = NULL;
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int mylen;
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if (mars_info) {
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answer = "internal error while determining mars_info\n";
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tmp = mars_info();
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if (tmp)
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answer = tmp;
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}
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mylen = strlen(answer);
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if (len > mylen)
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len = mylen;
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res = len;
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if (copy_to_user(buffer, answer, len)) {
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MARS_ERR("write %ld bytes at %p failed\n", len, buffer);
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res = -EFAULT;
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}
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brick_string_free(tmp);
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}
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done:
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MARS_DBG("res = %ld\n", res);
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*length = res;
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if (res >= 0) {
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*ppos += res;
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return 0;
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}
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return res;
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}
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static
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int lamport_sysctl_handler(
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struct ctl_table *table,
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int write,
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void __user *buffer,
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size_t *length,
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loff_t *ppos)
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{
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ssize_t res = 0;
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size_t len = *length;
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MARS_DBG("write = %d len = %ld pos = %lld\n", write, len, *ppos);
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if (!len || *ppos > 0) {
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goto done;
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}
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if (write) {
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return -EINVAL;
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} else {
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int my_len = 128;
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char *tmp = brick_string_alloc(my_len);
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struct timespec know = CURRENT_TIME;
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struct timespec lnow;
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get_lamport(&lnow);
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res = scnprintf(tmp, my_len,
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"CURRENT_TIME=%ld.%09ld\n"
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"lamport_now=%ld.%09ld\n",
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know.tv_sec, know.tv_nsec,
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lnow.tv_sec, lnow.tv_nsec
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);
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if (copy_to_user(buffer, tmp, res)) {
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MARS_ERR("write %ld bytes at %p failed\n", res, buffer);
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res = -EFAULT;
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}
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brick_string_free(tmp);
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}
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done:
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MARS_DBG("res = %ld\n", res);
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*length = res;
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if (res >= 0) {
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*ppos += res;
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return 0;
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}
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return res;
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}
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#ifdef CONFIG_MARS_LOADAVG_LIMIT
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int mars_max_loadavg = 0;
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EXPORT_SYMBOL_GPL(mars_max_loadavg);
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#endif
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#ifdef CTL_UNNUMBERED
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#define _CTL_NAME .ctl_name = CTL_UNNUMBERED,
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#define _CTL_STRATEGY(handler) .strategy = &handler,
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#else
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#define _CTL_NAME /*empty*/
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#define _CTL_STRATEGY(handler) /*empty*/
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#endif
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#define VEC_ENTRY(NAME,VAR,MODE,COUNT) \
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{ \
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_CTL_NAME \
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.procname = NAME, \
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.data = &(VAR), \
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.maxlen = sizeof(int) * (COUNT),\
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.mode = MODE, \
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.proc_handler = &proc_dointvec, \
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_CTL_STRATEGY(sysctl_intvec) \
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}
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#define INT_ENTRY(NAME,VAR,MODE) \
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VEC_ENTRY(NAME, VAR, MODE, 1)
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#define LIMITER_ENTRIES(VAR, PREFIX, SUFFIX) \
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INT_ENTRY(PREFIX "_total_ops_" SUFFIX, (VAR)->lim_total_ops, 0400), \
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INT_ENTRY(PREFIX "_total_sum_" SUFFIX, (VAR)->lim_total_sum, 0400), \
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INT_ENTRY(PREFIX "_ratelimit_" SUFFIX, (VAR)->lim_max_rate, 0600), \
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INT_ENTRY(PREFIX "_maxdelay_ms", (VAR)->lim_max_delay,0600), \
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INT_ENTRY(PREFIX "_minwindow_ms", (VAR)->lim_min_window,0600), \
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INT_ENTRY(PREFIX "_maxwindow_ms", (VAR)->lim_max_window,0600), \
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INT_ENTRY(PREFIX "_cumul_" SUFFIX, (VAR)->lim_cumul, 0600), \
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INT_ENTRY(PREFIX "_count_ops", (VAR)->lim_count, 0600), \
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INT_ENTRY(PREFIX "_rate_" SUFFIX, (VAR)->lim_rate, 0400) \
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#define THRESHOLD_ENTRIES(VAR, PREFIX) \
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INT_ENTRY(PREFIX "_threshold_us", (VAR)->thr_limit, 0600), \
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INT_ENTRY(PREFIX "_factor_percent", (VAR)->thr_factor, 0600), \
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INT_ENTRY(PREFIX "_plus_us", (VAR)->thr_plus, 0600), \
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INT_ENTRY(PREFIX "_max_ms", (VAR)->thr_max, 0600), \
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INT_ENTRY(PREFIX "_triggered", (VAR)->thr_triggered,0400), \
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INT_ENTRY(PREFIX "_true_hit", (VAR)->thr_true_hit, 0400) \
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static
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struct ctl_table traffic_tuning_table[] = {
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LIMITER_ENTRIES(&client_limiter, "client_role_traffic", "kb"),
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LIMITER_ENTRIES(&server_limiter, "server_role_traffic", "kb"),
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{}
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};
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static
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struct ctl_table io_tuning_table[] = {
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LIMITER_ENTRIES(&global_writeback.limiter, "writeback", "kb"),
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INT_ENTRY("writeback_until_percent", global_writeback.until_percent, 0600),
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THRESHOLD_ENTRIES(&global_io_threshold, "global_io"),
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THRESHOLD_ENTRIES(&bio_submit_threshold, "bio_submit"),
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THRESHOLD_ENTRIES(&bio_io_threshold[0], "bio_io_r"),
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THRESHOLD_ENTRIES(&bio_io_threshold[1], "bio_io_w"),
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THRESHOLD_ENTRIES(&aio_submit_threshold, "aio_submit"),
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THRESHOLD_ENTRIES(&aio_io_threshold[0], "aio_io_r"),
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THRESHOLD_ENTRIES(&aio_io_threshold[1], "aio_io_w"),
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THRESHOLD_ENTRIES(&aio_sync_threshold, "aio_sync"),
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{}
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};
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static
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struct ctl_table tcp_tuning_table[] = {
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INT_ENTRY("ip_tos", default_tcp_params.ip_tos, 0600),
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INT_ENTRY("tcp_window_size", default_tcp_params.tcp_window_size, 0600),
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INT_ENTRY("tcp_nodelay", default_tcp_params.tcp_nodelay, 0600),
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INT_ENTRY("tcp_timeout", default_tcp_params.tcp_timeout, 0600),
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INT_ENTRY("tcp_keepcnt", default_tcp_params.tcp_keepcnt, 0600),
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INT_ENTRY("tcp_keepintvl", default_tcp_params.tcp_keepintvl, 0600),
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INT_ENTRY("tcp_keepidle", default_tcp_params.tcp_keepidle, 0600),
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{}
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};
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static
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struct ctl_table mars_table[] = {
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{
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_CTL_NAME
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.procname = "version",
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.data = (char*)mars_version_string,
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.maxlen = sizeof(mars_version_string),
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.mode = 0400,
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.proc_handler = &proc_dostring,
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},
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{
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_CTL_NAME
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.procname = "trigger",
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.mode = 0200,
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.proc_handler = &trigger_sysctl_handler,
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},
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{
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_CTL_NAME
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.procname = "info",
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.mode = 0400,
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.proc_handler = &trigger_sysctl_handler,
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},
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{
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_CTL_NAME
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.procname = "lamport_clock",
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.mode = 0400,
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.proc_handler = &lamport_sysctl_handler,
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},
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INT_ENTRY("max_lamport_future", max_lamport_future, 0600),
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INT_ENTRY("show_log_messages", brick_say_logging, 0600),
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INT_ENTRY("show_debug_messages", brick_say_debug, 0600),
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INT_ENTRY("show_statistics_global", global_show_statist, 0600),
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INT_ENTRY("show_statistics_server", server_show_statist, 0600),
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INT_ENTRY("show_connections", global_show_connections, 0600),
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INT_ENTRY("aio_sync_mode", aio_sync_mode, 0600),
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#ifdef CONFIG_MARS_DEBUG
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INT_ENTRY("debug_crash_mode", mars_crash_mode, 0600),
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INT_ENTRY("debug_hang_mode", mars_hang_mode, 0600),
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#endif
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INT_ENTRY("logger_completion_semantics", trans_logger_completion_semantics, 0600),
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INT_ENTRY("logger_do_crc", trans_logger_do_crc, 0600),
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INT_ENTRY("syslog_min_class", brick_say_syslog_min, 0600),
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INT_ENTRY("syslog_max_class", brick_say_syslog_max, 0600),
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INT_ENTRY("syslog_flood_class", brick_say_syslog_flood_class, 0600),
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INT_ENTRY("syslog_flood_limit", brick_say_syslog_flood_limit, 0600),
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INT_ENTRY("syslog_flood_recovery_s", brick_say_syslog_flood_recovery, 0600),
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INT_ENTRY("delay_say_on_overflow",delay_say_on_overflow, 0600),
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INT_ENTRY("mapfree_period_sec", mapfree_period_sec, 0600),
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INT_ENTRY("mapfree_grace_keep_mb", mapfree_grace_keep_mb, 0600),
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INT_ENTRY("logger_max_interleave", trans_logger_max_interleave, 0600),
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INT_ENTRY("logger_resume", trans_logger_resume, 0600),
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INT_ENTRY("logger_replay_timeout_sec", trans_logger_replay_timeout, 0600),
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INT_ENTRY("mem_limit_percent", mars_mem_percent, 0600),
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INT_ENTRY("logger_mem_used_kb", trans_logger_mem_usage, 0400),
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INT_ENTRY("mem_used_raw_kb", brick_global_block_used,0400),
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#ifdef CONFIG_MARS_MEM_PREALLOC
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INT_ENTRY("mem_allow_freelist", brick_allow_freelist, 0600),
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VEC_ENTRY("mem_freelist_max", brick_mem_freelist_max, 0600, BRICK_MAX_ORDER+1),
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VEC_ENTRY("mem_alloc_count", brick_mem_alloc_count, 0400, BRICK_MAX_ORDER+1),
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VEC_ENTRY("mem_alloc_max", brick_mem_alloc_count, 0600, BRICK_MAX_ORDER+1),
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#endif
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INT_ENTRY("io_flying_count", mars_global_io_flying, 0400),
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INT_ENTRY("copy_overlap", mars_copy_overlap, 0600),
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INT_ENTRY("copy_timeout", mars_copy_timeout, 0600),
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INT_ENTRY("copy_read_prio", mars_copy_read_prio, 0600),
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INT_ENTRY("copy_write_prio", mars_copy_write_prio, 0600),
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INT_ENTRY("copy_read_max_fly", mars_copy_read_max_fly, 0600),
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INT_ENTRY("copy_write_max_fly", mars_copy_write_max_fly,0600),
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INT_ENTRY("statusfiles_rollover_sec", mars_rollover_interval, 0600),
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INT_ENTRY("scan_interval_sec", mars_scan_interval, 0600),
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INT_ENTRY("propagate_interval_sec", mars_propagate_interval, 0600),
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INT_ENTRY("sync_flip_interval_sec", mars_sync_flip_interval, 0600),
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INT_ENTRY("peer_abort", mars_peer_abort, 0600),
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INT_ENTRY("client_abort", mars_client_abort, 0600),
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INT_ENTRY("do_fast_fullsync", mars_fast_fullsync, 0600),
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INT_ENTRY("logrot_auto_gb", global_logrot_auto, 0600),
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INT_ENTRY("remaining_space_kb", global_remaining_space, 0400),
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INT_ENTRY("required_total_space_0_gb", global_free_space_0, 0600),
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INT_ENTRY("required_free_space_1_gb", global_free_space_1, 0600),
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INT_ENTRY("required_free_space_2_gb", global_free_space_2, 0600),
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INT_ENTRY("required_free_space_3_gb", global_free_space_3, 0600),
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INT_ENTRY("required_free_space_4_gb", global_free_space_4, 0600),
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INT_ENTRY("sync_want", global_sync_want, 0400),
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INT_ENTRY("sync_nr", global_sync_nr, 0400),
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INT_ENTRY("sync_limit", global_sync_limit, 0600),
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INT_ENTRY("handler_dent_limit", dent_limit, 0600),
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INT_ENTRY("handler_limit", handler_limit, 0600),
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INT_ENTRY("mars_emergency_mode", mars_emergency_mode, 0600),
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INT_ENTRY("mars_reset_emergency", mars_reset_emergency, 0600),
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INT_ENTRY("mars_keep_msg_s", mars_keep_msg, 0600),
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INT_ENTRY("write_throttle_start_percent", mars_throttle_start, 0600),
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INT_ENTRY("write_throttle_end_percent", mars_throttle_end, 0600),
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INT_ENTRY("write_throttle_size_threshold_kb", if_throttle_start_size, 0400),
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LIMITER_ENTRIES(&if_throttle, "write_throttle", "kb"),
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#ifdef CONFIG_MARS_LOADAVG_LIMIT
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INT_ENTRY("loadavg_limit", mars_max_loadavg, 0600),
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#endif
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// changing makes no sense because the server will immediately start upon modprobe
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INT_ENTRY("mars_port", mars_net_default_port, 0400),
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INT_ENTRY("network_io_timeout", global_net_io_timeout, 0600),
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{
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_CTL_NAME
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.procname = "traffic_tuning",
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.mode = 0500,
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.child = traffic_tuning_table,
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},
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{
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_CTL_NAME
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.procname = "io_tuning",
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.mode = 0500,
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.child = io_tuning_table,
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},
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{
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_CTL_NAME
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.procname = "tcp_tuning",
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.mode = 0500,
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.child = tcp_tuning_table,
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},
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{}
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};
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static
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struct ctl_table mars_root_table[] = {
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{
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_CTL_NAME
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.procname = "mars",
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.mode = 0500,
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.child = mars_table,
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},
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{}
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};
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////////////////// module init stuff /////////////////////////
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static struct ctl_table_header *header = NULL;
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int __init init_mars_proc(void)
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{
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MARS_INF("init_proc()\n");
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header = register_sysctl_table(mars_root_table);
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return 0;
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}
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void exit_mars_proc(void)
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{
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MARS_INF("exit_proc()\n");
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if (header) {
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unregister_sysctl_table(header);
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header = NULL;
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}
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}
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