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mars/kernel/sy_old/mars_proc.c
Thomas Schoebel-Theuer 3ab97f26b5 infra: allow fetching full dent info from peers
2020-03-26 20:16:39 +01:00

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/*
* MARS Long Distance Replication Software
*
* This file is part of MARS project: http://schoebel.github.io/mars/
*
* Copyright (C) 2010-2014 Thomas Schoebel-Theuer
* Copyright (C) 2011-2014 1&1 Internet AG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
//#define BRICK_DEBUGGING
//#define MARS_DEBUGGING
//#define IO_DEBUGGING
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/sysctl.h>
#include <linux/uaccess.h>
#include "strategy.h"
#include "mars_proc.h"
#include "../lib_mapfree.h"
#include "../mars_bio.h"
#include "../mars_aio.h"
#include "../mars_if.h"
#include "../mars_copy.h"
#include "../mars_client.h"
#include "../mars_server.h"
#include "../mars_trans_logger.h"
#include "../buildtag.h"
const char mars_version_string[] = BUILDTAG " (" BUILDHOST " " BUILDDATE ") "
#ifndef CONFIG_MARS_DEBUG
"production"
#else
"DEBUG"
#endif
#ifdef CONFIG_MARS_DEBUG_MEM
" BAD_PERFORMANCE"
#endif
#ifdef CONFIG_MARS_DEBUG_ORDER0
" EVIL_PERFORMANCE"
#endif
;
mars_info_fn mars_info = NULL;
static
void interpret_user_message(char *msg)
{
char cmd = msg[0];
char *rest = msg + 1;
while (*rest == ' ')
rest++;
switch (cmd) {
case 'l': /* write to syslog via say logging */
MARS_INF("%s\n", rest);
break;
case 'L': /* write to syslog via printk */
printk("%s\n", rest);
break;
default:
MARS_DBG("unknown user message '%s'\n", msg);
}
}
static
int trigger_sysctl_handler(
struct ctl_table *table,
int write,
void __user *buffer,
size_t *length,
loff_t *ppos)
{
ssize_t res = 0;
size_t len = *length;
MARS_DBG("write = %d len = %ld pos = %lld\n", write, len, *ppos);
if (len <= 0 || *ppos > 0) {
goto done;
}
if (write) {
char *tmp = brick_string_alloc(len + 1);
res = len; // fake consumption of all data
if (copy_from_user(tmp, buffer, len)) {
MARS_ERR("cannot read %ld bytes from trigger\n", len);
goto dealloc;
}
tmp[len] = '\0';
if (tmp[0] == ' ' ||
(tmp[0] >= '0' && tmp[0] <= '9')) {
int code = 0;
sscanf(tmp, "%d", &code);
if (code >= 8) {
mars_full_trigger(code);
} else if (code > 0) {
mars_trigger();
}
if (code > 2) {
mars_remote_trigger_all();
} else if (code > 1) {
mars_remote_trigger();
}
} else {
interpret_user_message(tmp);
}
dealloc:
brick_string_free(tmp);
} else {
char *answer = "MARS module not operational\n";
char *tmp = NULL;
int mylen;
if (mars_info) {
answer = "internal error while determining mars_info\n";
tmp = mars_info();
if (tmp)
answer = tmp;
}
mylen = strlen(answer);
if (len > mylen)
len = mylen;
res = len;
if (copy_to_user(buffer, answer, len)) {
MARS_ERR("write %ld bytes at %p failed\n", len, buffer);
res = -EFAULT;
}
brick_string_free(tmp);
}
done:
MARS_DBG("res = %ld\n", res);
*length = res;
if (res >= 0) {
*ppos += res;
return 0;
}
return res;
}
static
int lamport_sysctl_handler(
struct ctl_table *table,
int write,
void __user *buffer,
size_t *length,
loff_t *ppos)
{
ssize_t res = 0;
size_t len = *length;
MARS_DBG("write = %d len = %ld pos = %lld\n", write, len, *ppos);
if (!len || *ppos > 0) {
goto done;
}
if (write) {
return -EINVAL;
} else {
int my_len = 128;
char *tmp = brick_string_alloc(my_len);
struct lamport_time know;
struct lamport_time lnow;
get_lamport(&know, &lnow);
res = scnprintf(tmp, my_len,
"CURRENT_TIME=%ld.%09ld\n"
"lamport_now=%ld.%09ld\n",
know.tv_sec, know.tv_nsec,
lnow.tv_sec, lnow.tv_nsec
);
if (copy_to_user(buffer, tmp, res)) {
MARS_ERR("write %ld bytes at %p failed\n", res, buffer);
res = -EFAULT;
}
brick_string_free(tmp);
}
done:
MARS_DBG("res = %ld\n", res);
*length = res;
if (res >= 0) {
*ppos += res;
return 0;
}
return res;
}
#ifdef CTL_UNNUMBERED
#define _CTL_NAME .ctl_name = CTL_UNNUMBERED,
#define _CTL_STRATEGY(handler) .strategy = &handler,
#else
#define _CTL_NAME /*empty*/
#define _CTL_STRATEGY(handler) /*empty*/
#endif
#define VEC_ENTRY(NAME,VAR,MODE,COUNT) \
{ \
_CTL_NAME \
.procname = NAME, \
.data = &(VAR), \
.maxlen = sizeof(int) * (COUNT),\
.mode = MODE, \
.proc_handler = &proc_dointvec, \
_CTL_STRATEGY(sysctl_intvec) \
}
#define INT_ENTRY(NAME,VAR,MODE) \
VEC_ENTRY(NAME, VAR, MODE, 1)
#define LIMITER_ENTRIES(VAR, PREFIX, SUFFIX) \
INT_ENTRY(PREFIX "_total_ops_" SUFFIX, (VAR)->lim_total_ops, 0400), \
INT_ENTRY(PREFIX "_total_sum_" SUFFIX, (VAR)->lim_total_sum, 0400), \
INT_ENTRY(PREFIX "_ratelimit_" SUFFIX, (VAR)->lim_max_rate, 0600), \
INT_ENTRY(PREFIX "_maxdelay_ms", (VAR)->lim_max_delay,0600), \
INT_ENTRY(PREFIX "_minwindow_ms", (VAR)->lim_min_window,0600), \
INT_ENTRY(PREFIX "_maxwindow_ms", (VAR)->lim_max_window,0600), \
INT_ENTRY(PREFIX "_cumul_" SUFFIX, (VAR)->lim_cumul, 0600), \
INT_ENTRY(PREFIX "_count_ops", (VAR)->lim_count, 0600), \
INT_ENTRY(PREFIX "_rate_" SUFFIX, (VAR)->lim_rate, 0400) \
#define THRESHOLD_ENTRIES(VAR, PREFIX) \
INT_ENTRY(PREFIX "_threshold_us", (VAR)->thr_limit, 0600), \
INT_ENTRY(PREFIX "_factor_percent", (VAR)->thr_factor, 0600), \
INT_ENTRY(PREFIX "_plus_us", (VAR)->thr_plus, 0600), \
INT_ENTRY(PREFIX "_max_ms", (VAR)->thr_max, 0600), \
INT_ENTRY(PREFIX "_triggered", (VAR)->thr_triggered,0400), \
INT_ENTRY(PREFIX "_true_hit", (VAR)->thr_true_hit, 0400) \
static
struct ctl_table traffic_tuning_table[] = {
LIMITER_ENTRIES(&client_limiter, "client_role_traffic", "kb"),
LIMITER_ENTRIES(&server_limiter, "server_role_traffic", "kb"),
{}
};
static
struct ctl_table io_tuning_table[] = {
LIMITER_ENTRIES(&global_writeback.limiter, "writeback", "kb"),
INT_ENTRY("writeback_until_percent", global_writeback.until_percent, 0600),
THRESHOLD_ENTRIES(&global_io_threshold, "global_io"),
INT_ENTRY("bio_nr_requests", bio_nr_requests, 0600),
THRESHOLD_ENTRIES(&bio_submit_threshold, "bio_submit"),
THRESHOLD_ENTRIES(&bio_io_threshold[0], "bio_io_r"),
THRESHOLD_ENTRIES(&bio_io_threshold[1], "bio_io_w"),
THRESHOLD_ENTRIES(&aio_submit_threshold, "aio_submit"),
THRESHOLD_ENTRIES(&aio_io_threshold[0], "aio_io_r"),
THRESHOLD_ENTRIES(&aio_io_threshold[1], "aio_io_w"),
THRESHOLD_ENTRIES(&aio_sync_threshold, "aio_sync"),
INT_ENTRY("if_nr_requests", if_nr_requests, 0600),
{}
};
#define TCP_ENTRY(NAME,TRAFFIC_TYPE) \
INT_ENTRY(#NAME, mars_tcp_params[TRAFFIC_TYPE].NAME, 0600)
#define make_tcp_tuning_table(TRAFFIC_TYPE) \
static \
struct ctl_table tcp_tuning_table_##TRAFFIC_TYPE[] = { \
TCP_ENTRY(ip_tos, TRAFFIC_TYPE), \
TCP_ENTRY(tcp_window_size, TRAFFIC_TYPE), \
TCP_ENTRY(tcp_nodelay, TRAFFIC_TYPE), \
TCP_ENTRY(tcp_timeout, TRAFFIC_TYPE), \
TCP_ENTRY(tcp_keepcnt, TRAFFIC_TYPE), \
TCP_ENTRY(tcp_keepintvl, TRAFFIC_TYPE), \
TCP_ENTRY(tcp_keepidle, TRAFFIC_TYPE), \
{} \
}
make_tcp_tuning_table(MARS_TRAFFIC_META);
make_tcp_tuning_table(MARS_TRAFFIC_REPLICATION);
make_tcp_tuning_table(MARS_TRAFFIC_SYNC);
static
struct ctl_table mars_table[] = {
{
_CTL_NAME
.procname = "version",
.data = (char*)mars_version_string,
.maxlen = sizeof(mars_version_string),
.mode = 0400,
.proc_handler = &proc_dostring,
},
{
_CTL_NAME
.procname = "trigger",
.mode = 0200,
.proc_handler = &trigger_sysctl_handler,
},
{
_CTL_NAME
.procname = "info",
.mode = 0400,
.proc_handler = &trigger_sysctl_handler,
},
{
_CTL_NAME
.procname = "lamport_clock",
.mode = 0400,
.proc_handler = &lamport_sysctl_handler,
},
INT_ENTRY("max_lamport_future", max_lamport_future, 0600),
INT_ENTRY("show_log_messages", brick_say_logging, 0600),
INT_ENTRY("show_debug_messages", brick_say_debug, 0600),
INT_ENTRY("show_statistics_global", global_show_statist, 0600),
INT_ENTRY("show_statistics_server", server_show_statist, 0600),
INT_ENTRY("show_connections", global_show_connections, 0600),
INT_ENTRY("aio_sync_mode", aio_sync_mode, 0600),
#ifdef CONFIG_MARS_DEBUG
INT_ENTRY("debug_crash_mode", mars_crash_mode, 0600),
INT_ENTRY("debug_hang_mode", mars_hang_mode, 0600),
#endif
INT_ENTRY("logger_completion_semantics", trans_logger_completion_semantics, 0600),
INT_ENTRY("logger_do_crc", trans_logger_do_crc, 0600),
INT_ENTRY("syslog_min_class", brick_say_syslog_min, 0600),
INT_ENTRY("syslog_max_class", brick_say_syslog_max, 0600),
INT_ENTRY("syslog_flood_class", brick_say_syslog_flood_class, 0600),
INT_ENTRY("syslog_flood_limit", brick_say_syslog_flood_limit, 0600),
INT_ENTRY("syslog_flood_recovery_s", brick_say_syslog_flood_recovery, 0600),
INT_ENTRY("delay_say_on_overflow",delay_say_on_overflow, 0600),
INT_ENTRY("mapfree_period_sec", mapfree_period_sec, 0600),
INT_ENTRY("mapfree_grace_keep_mb", mapfree_grace_keep_mb, 0600),
INT_ENTRY("logger_pressure_limit", trans_logger_pressure_limit, 0600),
INT_ENTRY("logger_disable_pressure", trans_logger_disable_pressure, 0600),
INT_ENTRY("logger_writeback_maxage_s", trans_logger_writeback_maxage, 0600),
INT_ENTRY("logger_report_interval_s", trans_logger_report_interval, 0600),
INT_ENTRY("logger_max_interleave", trans_logger_max_interleave, 0600),
INT_ENTRY("logger_resume", trans_logger_resume, 0600),
INT_ENTRY("logger_replay_timeout_sec", trans_logger_replay_timeout, 0600),
INT_ENTRY("mem_limit_percent", mars_mem_percent, 0600),
INT_ENTRY("mem_limit_gb", mars_mem_gb, 0600),
INT_ENTRY("logger_mem_used_kb", trans_logger_mem_usage, 0400),
INT_ENTRY("mem_used_raw_kb", brick_global_block_used,0400),
#ifdef CONFIG_MARS_MEM_PREALLOC
INT_ENTRY("mem_allow_freelist", brick_allow_freelist, 0600),
VEC_ENTRY("mem_freelist_max", brick_mem_freelist_max, 0600, BRICK_MAX_ORDER+1),
VEC_ENTRY("mem_alloc_count", brick_mem_alloc_count, 0400, BRICK_MAX_ORDER+1),
VEC_ENTRY("mem_alloc_max", brick_mem_alloc_count, 0600, BRICK_MAX_ORDER+1),
#endif
INT_ENTRY("io_flying_count", mars_global_io_flying, 0400),
INT_ENTRY("copy_overlap", mars_copy_overlap, 0600),
INT_ENTRY("copy_strict_write_order", mars_copy_strict_write_order, 0600),
INT_ENTRY("copy_timeout", mars_copy_timeout, 0600),
INT_ENTRY("copy_read_prio", mars_copy_read_prio, 0600),
INT_ENTRY("copy_write_prio", mars_copy_write_prio, 0600),
INT_ENTRY("copy_read_max_fly", mars_copy_read_max_fly, 0600),
INT_ENTRY("copy_write_max_fly", mars_copy_write_max_fly,0600),
INT_ENTRY("statusfiles_rollover_sec", mars_rollover_interval, 0600),
INT_ENTRY("scan_interval_sec", mars_scan_interval, 0600),
INT_ENTRY("propagate_interval_sec", mars_propagate_interval, 0600),
INT_ENTRY("sync_flip_interval_sec", mars_sync_flip_interval, 0600),
INT_ENTRY("additional_peers_running", mars_running_additional_peers, 0400),
INT_ENTRY("additional_peers_to_run", mars_run_additional_peers, 0600),
INT_ENTRY("peer_abort", mars_peer_abort, 0600),
INT_ENTRY("client_abort", mars_client_abort, 0600),
INT_ENTRY("do_fast_fullsync", mars_fast_fullsync, 0600),
INT_ENTRY("logrot_auto_gb", global_logrot_auto, 0600),
INT_ENTRY("remaining_space_kb", global_remaining_space, 0400),
INT_ENTRY("required_total_space_0_gb", global_free_space_0, 0600),
INT_ENTRY("required_free_space_1_gb", global_free_space_1, 0600),
INT_ENTRY("required_free_space_2_gb", global_free_space_2, 0600),
INT_ENTRY("required_free_space_3_gb", global_free_space_3, 0600),
INT_ENTRY("required_free_space_4_gb", global_free_space_4, 0600),
INT_ENTRY("sync_nr", global_sync_nr, 0400),
INT_ENTRY("sync_limit", global_sync_limit, 0600),
INT_ENTRY("handler_dent_limit", dent_limit, 0600),
INT_ENTRY("handler_dent_retry", dent_retry, 0600),
INT_ENTRY("handler_limit", handler_limit, 0600),
INT_ENTRY("mars_emergency_mode", mars_emergency_mode, 0600),
INT_ENTRY("mars_reset_emergency", mars_reset_emergency, 0600),
INT_ENTRY("mars_keep_msg_s", mars_keep_msg, 0600),
INT_ENTRY("write_throttle_start_percent", mars_throttle_start, 0600),
INT_ENTRY("write_throttle_end_percent", mars_throttle_end, 0600),
INT_ENTRY("write_throttle_size_threshold_kb", if_throttle_start_size, 0400),
LIMITER_ENTRIES(&if_throttle, "write_throttle", "kb"),
// changing makes no sense because the server will immediately start upon modprobe
INT_ENTRY("mars_port", mars_net_default_port, 0400),
INT_ENTRY("network_io_timeout", global_net_io_timeout, 0600),
INT_ENTRY("client_info_timeout", mars_client_info_timeout, 0600),
INT_ENTRY("parallel_connections", max_client_channels, 0600),
INT_ENTRY("parallel_bulk_feed", max_client_bulk, 0600),
{
_CTL_NAME
.procname = "traffic_tuning",
.mode = 0500,
.child = traffic_tuning_table,
},
{
_CTL_NAME
.procname = "io_tuning",
.mode = 0500,
.child = io_tuning_table,
},
{
_CTL_NAME
.procname = "tcp_tuning_0_meta_traffic",
.mode = 0500,
.child = tcp_tuning_table_MARS_TRAFFIC_META,
},
{
_CTL_NAME
.procname = "tcp_tuning_1_replication_traffic",
.mode = 0500,
.child = tcp_tuning_table_MARS_TRAFFIC_REPLICATION,
},
{
_CTL_NAME
.procname = "tcp_tuning_2_sync_traffic",
.mode = 0500,
.child = tcp_tuning_table_MARS_TRAFFIC_SYNC,
},
{}
};
static
struct ctl_table mars_root_table[] = {
{
_CTL_NAME
.procname = "mars",
.mode = 0500,
.child = mars_table,
},
{}
};
////////////////// module init stuff /////////////////////////
static struct ctl_table_header *header = NULL;
int __init init_mars_proc(void)
{
MARS_INF("init_proc()\n");
header = register_sysctl_table(mars_root_table);
return 0;
}
void exit_mars_proc(void)
{
MARS_INF("exit_proc()\n");
if (header) {
unregister_sysctl_table(header);
header = NULL;
}
}
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