mars/sy_old/mars_proc.c

214 lines
5.2 KiB
C

// (c) 2011 Thomas Schoebel-Theuer / 1&1 Internet AG
//#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 "../mars_bio.h"
#include "../mars_aio.h"
#include "../mars_client.h"
#include "../mars_server.h"
#include "../mars_trans_logger.h"
mars_info_fn mars_info = NULL;
static
int trigger_sysctl_handler(
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) {
char tmp[8] = {};
int code = 0;
res = len; // fake consumption of all data
if (len > 7)
len = 7;
if (!copy_from_user(tmp, buffer, len)) {
sscanf(tmp, "%d", &code);
if (code) {
mars_trigger();
mars_remote_trigger();
}
}
} else {
char *answer = "MARS module not loaded\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;
}
#ifdef CONFIG_MARS_LOADAVG_LIMIT
int mars_max_loadavg = 0;
EXPORT_SYMBOL_GPL(mars_max_loadavg);
#endif
#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 INT_ENTRY(NAME,VAR,MODE) \
{ \
_CTL_NAME \
.procname = NAME, \
.data = &(VAR), \
.maxlen = sizeof(int), \
.mode = MODE, \
.proc_handler = &proc_dointvec, \
_CTL_STRATEGY(sysctl_intvec) \
}
#define LIMITER_ENTRIES(VAR, PREFIX, SUFFIX) \
INT_ENTRY(PREFIX "_limit_" SUFFIX, (VAR)->lim_max_rate, 0600), \
INT_ENTRY(PREFIX "_rate_" SUFFIX, (VAR)->lim_rate, 0600) \
#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 "_triggered", (VAR)->thr_triggered, 0600), \
INT_ENTRY(PREFIX "_true_hit", (VAR)->thr_true_hit, 0600) \
static
ctl_table tuning_table[] = {
LIMITER_ENTRIES(&client_limiter, "network_traffic", "kb"),
LIMITER_ENTRIES(&server_limiter, "server_io", "kb"),
LIMITER_ENTRIES(&global_writeback.limiter, "writeback", "kb"),
INT_ENTRY("writeback_until_percent", global_writeback.until_percent, 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"),
{}
};
static
ctl_table mars_table[] = {
{
_CTL_NAME
.procname = "trigger",
.mode = 0200,
.proc_handler = &trigger_sysctl_handler,
},
INT_ENTRY("syslog_min_class", brick_say_syslog_min, 0600),
INT_ENTRY("syslog_max_class", brick_say_syslog_max, 0600),
INT_ENTRY("delay_say_on_overflow",delay_say_on_overflow, 0600),
INT_ENTRY("percent_mem_limit_kb", mars_mem_percent, 0600),
INT_ENTRY("logger_mem_used_kb", trans_logger_mem_usage, 0400),
INT_ENTRY("raw_mem_used_kb", brick_global_block_used,0400),
INT_ENTRY("io_flying", mars_global_io_flying, 0400),
INT_ENTRY("statusfiles_rollover", rollover_time, 0600),
INT_ENTRY("logrot_auto_gb", global_logrot_auto, 0600),
INT_ENTRY("logdel_auto_gb", global_logdel_auto, 0600),
INT_ENTRY("free_space_mb", global_free_space, 0600),
#ifdef CONFIG_MARS_LOADAVG_LIMIT
INT_ENTRY("loadavg_limit", mars_max_loadavg, 0600),
#endif
INT_ENTRY("network_io_timeout", global_net_io_timeout, 0600),
{
_CTL_NAME
.procname = "tuning",
.mode = 0500,
.child = tuning_table,
},
{}
};
static
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 exit_mars_proc(void)
{
MARS_INF("exit_proc()\n");
if (header) {
unregister_sysctl_table(header);
header = NULL;
}
}
#ifndef CONFIG_MARS_HAVE_BIGMODULE
MODULE_DESCRIPTION("MARS /proc/ infrastructure");
MODULE_AUTHOR("Thomas Schoebel-Theuer <tst@1und1.de>");
MODULE_LICENSE("GPL");
module_init(init_mars_proc);
module_exit(exit_mars_proc);
#endif