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Date: Fri, 30 Dec 2016 23:57:54 +0100
From: Thomas Schoebel-Theuer <tst@...oebel-theuer.de>
To: linux-kernel@...r.kernel.org, tst@...oebel-theuer.de
Subject: [RFC 28/32] mars: add new module mars_proc
Signed-off-by: Thomas Schoebel-Theuer <tst@...oebel-theuer.de>
---
drivers/staging/mars/mars/mars_proc.c | 389 ++++++++++++++++++++++++++++++++++
drivers/staging/mars/mars/mars_proc.h | 34 +++
2 files changed, 423 insertions(+)
create mode 100644 drivers/staging/mars/mars/mars_proc.c
create mode 100644 drivers/staging/mars/mars/mars_proc.h
diff --git a/drivers/staging/mars/mars/mars_proc.c b/drivers/staging/mars/mars/mars_proc.c
new file mode 100644
index 000000000000..84b4dfc82211
--- /dev/null
+++ b/drivers/staging/mars/mars/mars_proc.c
@@ -0,0 +1,389 @@
+/*
+ * MARS Long Distance Replication Software
+ *
+ * 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.
+ */
+
+#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 <linux/xio/lib_mapfree.h>
+#include <linux/xio/xio_bio.h>
+#include <linux/xio/xio_if.h>
+#include <linux/xio/xio_copy.h>
+#include <linux/xio/xio_client.h>
+#include <linux/xio/xio_server.h>
+#include <linux/xio/xio_trans_logger.h>
+
+xio_info_fn xio_info;
+
+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;
+
+ XIO_DBG("write = %d len = %ld pos = %lld\n", write, len, *ppos);
+
+ if (!len || *ppos > 0)
+ goto done;
+
+ if (write) {
+ char tmp[8] = {};
+
+ res = len; /* fake consumption of all data */
+
+ if (len > 7)
+ len = 7;
+ if (!copy_from_user(tmp, buffer, len)) {
+ int code = 0;
+ int status = kstrtoint(tmp, 10, &code);
+
+ /* the return value from ssanf() does not matter */
+ (void)status;
+ if (code > 0)
+ local_trigger();
+ if (code > 1)
+ remote_trigger();
+ }
+ } else {
+ char *answer = "MARS module not operational\n";
+ char *tmp = NULL;
+ int mylen;
+
+ if (xio_info) {
+ answer = "internal error while determining xio_info\n";
+ tmp = xio_info();
+ if (tmp)
+ answer = tmp;
+ }
+
+ mylen = strlen(answer);
+ if (len > mylen)
+ len = mylen;
+ res = len;
+ if (copy_to_user(buffer, answer, len)) {
+ XIO_ERR("write %ld bytes at %p failed\n", len, buffer);
+ res = -EFAULT;
+ }
+ brick_string_free(tmp);
+ }
+
+done:
+ XIO_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;
+ int my_len = 128;
+ char *tmp = brick_string_alloc(my_len);
+ struct timespec know = CURRENT_TIME;
+ struct timespec lnow;
+
+ XIO_DBG("write = %d len = %ld pos = %lld\n", write, len, *ppos);
+
+ if (!len || *ppos > 0)
+ goto done;
+
+ if (write)
+ return -EINVAL;
+
+ get_lamport(&lnow);
+
+ res = scnprintf(
+ tmp,
+ my_len,
+ "CURRENT_TIME=%ld.%09ld\nlamport_now=%ld.%09ld\n",
+ know.tv_sec, know.tv_nsec,
+ lnow.tv_sec, lnow.tv_nsec
+ );
+
+ if (copy_to_user(buffer, tmp, res)) {
+ XIO_ERR("write %ld bytes at %p failed\n", res, buffer);
+ res = -EFAULT;
+ }
+ brick_string_free(tmp);
+
+done:
+ XIO_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)
+
+/* checkpatch.pl: no, these complex values cannot be easily enclosed
+ * in parentheses. If { ... } were used inside the macro body, it would
+ * no longer be possible to add additional fields externally.
+ * I could inject further fields externally via parameters, but
+ * that would make it less understandable.
+ */
+#define LIMITER_ENTRIES(VAR, PREFIX, SUFFIX) \
+ INT_ENTRY(PREFIX "_ops_total_" SUFFIX, (VAR)->lim_total_ops, 0400),\
+ INT_ENTRY(PREFIX "_amount_total_" SUFFIX, (VAR)->lim_total_amount, 0400),\
+ INT_ENTRY(PREFIX "_ops_ratelimit_" SUFFIX, (VAR)->lim_max_ops_rate, 0600),\
+ INT_ENTRY(PREFIX "_amount_ratelimit_" SUFFIX, (VAR)->lim_max_amount_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 "_ops_cumul_" SUFFIX, (VAR)->lim_ops_cumul, 0600),\
+ INT_ENTRY(PREFIX "_amount_cumul_" SUFFIX, (VAR)->lim_amount_cumul, 0600),\
+ INT_ENTRY(PREFIX "_ops_rate_" SUFFIX, (VAR)->lim_ops_rate, 0400),\
+ INT_ENTRY(PREFIX "_amount_rate_" SUFFIX, (VAR)->lim_amount_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"),
+ 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"),
+ {}
+};
+
+#define TCP_TUNING_ENTRIES(VAR) \
+ INT_ENTRY("ip_tos", (VAR)->ip_tos, 0600), \
+ INT_ENTRY("tcp_window_size", (VAR)->tcp_window_size, 0600), \
+ INT_ENTRY("tcp_nodelay", (VAR)->tcp_nodelay, 0600), \
+ INT_ENTRY("tcp_timeout", (VAR)->tcp_timeout, 0600), \
+ INT_ENTRY("tcp_keepcnt", (VAR)->tcp_keepcnt, 0600), \
+ INT_ENTRY("tcp_keepintvl", (VAR)->tcp_keepintvl, 0600), \
+ INT_ENTRY("tcp_keepidle", (VAR)->tcp_keepidle, 0600), \
+
+static
+struct ctl_table repl_tuning_table[] = {
+ TCP_TUNING_ENTRIES(&repl_tcp_params)
+ {}
+};
+
+static
+struct ctl_table device_tuning_table[] = {
+ TCP_TUNING_ENTRIES(&device_tcp_params)
+ {}
+};
+
+static
+struct ctl_table mars_table[] = {
+ {
+ _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("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),
+#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_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("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", xio_global_io_flying, 0400),
+ INT_ENTRY("copy_overlap", xio_copy_overlap, 0600),
+ INT_ENTRY("copy_read_prio", xio_copy_read_prio, 0600),
+ INT_ENTRY("copy_write_prio", xio_copy_write_prio, 0600),
+ INT_ENTRY("copy_read_max_fly", xio_copy_read_max_fly, 0600),
+ INT_ENTRY("copy_write_max_fly", xio_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("peer_abort", mars_peer_abort, 0600),
+ INT_ENTRY("client_abort", xio_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_want", global_sync_want, 0400),
+ INT_ENTRY("sync_nr", global_sync_nr, 0400),
+ INT_ENTRY("sync_limit", global_sync_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", xio_throttle_start, 0600),
+ INT_ENTRY("write_throttle_end_percent", xio_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("xio_port", xio_net_default_port, 0400),
+#ifdef __HAVE_LZO
+ INT_ENTRY("network_compress_data", xio_net_compress_data, 0600),
+#endif
+ INT_ENTRY("net_bind_before_listen", xio_net_bind_before_listen, 0600),
+ INT_ENTRY("net_bind_before_connect", xio_net_bind_before_connect, 0600),
+ INT_ENTRY("network_io_timeout", global_net_io_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_repl",
+ .mode = 0500,
+ .child = repl_tuning_table,
+ },
+ {
+ _CTL_NAME
+ .procname = "tcp_tuning_device",
+ .mode = 0500,
+ .child = device_tuning_table,
+ },
+ {}
+};
+
+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;
+
+int __init init_xio_proc(void)
+{
+ XIO_INF("init_proc()\n");
+
+ header = register_sysctl_table(mars_root_table);
+
+ return 0;
+}
+
+void exit_xio_proc(void)
+{
+ XIO_INF("exit_proc()\n");
+ if (header) {
+ unregister_sysctl_table(header);
+ header = NULL;
+ }
+}
diff --git a/drivers/staging/mars/mars/mars_proc.h b/drivers/staging/mars/mars/mars_proc.h
new file mode 100644
index 000000000000..883b819eced1
--- /dev/null
+++ b/drivers/staging/mars/mars/mars_proc.h
@@ -0,0 +1,34 @@
+/*
+ * MARS Long Distance Replication Software
+ *
+ * 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.
+ */
+
+#ifndef MARS_PROC_H
+#define MARS_PROC_H
+
+typedef char * (*xio_info_fn)(void);
+
+extern xio_info_fn xio_info;
+
+extern int min_free_kbytes;
+
+/***********************************************************************/
+
+/* init */
+
+extern int init_xio_proc(void);
+extern void exit_xio_proc(void);
+
+#endif
--
2.11.0
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