2 * Copyright (C) 2012 Cray, Inc.
4 * Author: Nic Henke <nic@cray.com>
5 * Author: James Shimek <jshimek@cray.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or
10 * modify it under the terms of version 2 of the GNU General Public
11 * License as published by the Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with Lustre; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 /* this code liberated and modified from Lustre */
25 #define DEBUG_SUBSYSTEM S_LND
29 #define GNILND_RCA_INJ_STRLEN 16
30 typedef struct kgn_sysctl_data {
31 int ksd_pause_trigger;
33 int ksd_rdmaq_override;
34 char ksd_rca_inject[GNILND_RCA_INJ_STRLEN];
37 static kgn_sysctl_data_t kgnilnd_sysctl;
39 #if defined(CONFIG_SYSCTL)
41 static struct ctl_table_header *kgnilnd_table_header = NULL;
43 static int LL_PROC_PROTO(proc_toggle_thread_pause)
45 int old_val = kgnilnd_sysctl.ksd_pause_trigger;
49 rc = proc_dointvec(table, write, buffer, lenp, ppos);
55 if (kgnilnd_data.kgn_init != GNILND_INIT_ALL) {
60 if (old_val != kgnilnd_sysctl.ksd_pause_trigger) {
61 down(&kgnilnd_data.kgn_quiesce_sem);
62 CDEBUG(D_NET, "setting quiesce_trigger %d\n", old_val);
63 kgnilnd_data.kgn_quiesce_trigger = kgnilnd_sysctl.ksd_pause_trigger;
64 kgnilnd_quiesce_wait("admin sysctl");
65 up(&kgnilnd_data.kgn_quiesce_sem);
71 static int LL_PROC_PROTO(proc_hw_quiesce)
77 rc = proc_dointvec(table, write, buffer, lenp, ppos);
83 if (kgnilnd_data.kgn_init != GNILND_INIT_ALL) {
89 /* only device 0 gets the handle, see kgnilnd_dev_init */
90 dev = &kgnilnd_data.kgn_devices[0];
92 LASSERTF(dev != NULL, "dev 0 is NULL\n");
94 kgnilnd_quiesce_end_callback(dev->gnd_handle,
95 kgnilnd_sysctl.ksd_quiesce_secs * MSEC_PER_SEC);
100 int LL_PROC_PROTO(proc_trigger_stack_reset)
109 rc = proc_dointvec(table, write, buffer, lenp, ppos);
113 /* only device 0 gets the handle, see kgnilnd_dev_init */
114 dev = &kgnilnd_data.kgn_devices[0];
116 LASSERTF(dev != NULL, "dev 0 is NULL\n");
118 kgnilnd_critical_error(dev->gnd_err_handle);
120 /* Wait for the reset to complete. This prevents any races in testing
121 * where we'd immediately try to send traffic again */
122 while (kgnilnd_data.kgn_needs_reset != 0) {
124 LCONSOLE((((i) & (-i)) == i) ? D_WARNING : D_NET,
125 "Waiting for stack reset request to clear\n");
126 cfs_pause(cfs_time_seconds(1 * i));
132 static int LL_PROC_PROTO(proc_toggle_rdmaq_override)
134 int old_val = kgnilnd_sysctl.ksd_rdmaq_override;
138 rc = proc_dointvec(table, write, buffer, lenp, ppos);
144 if (kgnilnd_data.kgn_init != GNILND_INIT_ALL) {
149 if (old_val != kgnilnd_sysctl.ksd_rdmaq_override) {
150 long new_mb = kgnilnd_sysctl.ksd_rdmaq_override * (long)(1024*1024);
151 LCONSOLE_INFO("changing RDMAQ override to %d mbytes/sec\n",
152 kgnilnd_sysctl.ksd_rdmaq_override);
153 /* override proc is mbytes, but we calc in bytes */
154 kgnilnd_data.kgn_rdmaq_override = new_mb;
161 /* /proc/sys entry point for injecting up/down nid event
164 static int LL_PROC_PROTO(proc_rca_inject)
172 rc = proc_dostring(table, write, buffer, lenp, ppos);
179 if (kgnilnd_data.kgn_init != GNILND_INIT_ALL) {
184 /* convert to nid, up/down values */
185 rc = sscanf(kgnilnd_sysctl.ksd_rca_inject, "%s %d", command, &nid);
186 CDEBUG(D_INFO, "command %s, nid %d\n", command, nid);
189 CDEBUG(D_ERROR, "invalid parameter\n");
192 switch (command[0]) {
195 CDEBUG(D_INFO, "take node %d down\n", nid);
199 CDEBUG(D_INFO, "bring node %d up\n", nid);
202 CDEBUG(D_ERROR, "invalid command %s\n", command);
207 CDEBUG(D_INFO, "proc_rca_inject: reporting node_down %d, nid %d\n",
209 rc = kgnilnd_report_node_state(nid, node_down);
218 static struct ctl_table kgnilnd_table[] = {
220 * NB No .strategy entries have been provided since sysctl(8) prefers
221 * to go via /proc for portability.
225 .procname = "version",
226 .data = KGNILND_BUILD_REV,
227 .maxlen = sizeof(KGNILND_BUILD_REV),
229 .proc_handler = &proc_dostring
233 .procname = "thread_pause",
234 .data = &kgnilnd_sysctl.ksd_pause_trigger,
235 .maxlen = sizeof(int),
237 .proc_handler = &proc_toggle_thread_pause,
241 .procname = "hw_quiesce",
242 .data = &kgnilnd_sysctl.ksd_quiesce_secs,
243 .maxlen = sizeof(__u32),
245 .proc_handler = &proc_hw_quiesce,
249 .procname = "stack_reset",
251 .maxlen = sizeof(int),
253 .proc_handler = &proc_trigger_stack_reset,
257 .procname = "rdmaq_override",
258 .data = &kgnilnd_sysctl.ksd_rdmaq_override,
259 .maxlen = sizeof(int),
261 .proc_handler = &proc_toggle_rdmaq_override,
265 .procname = "rca_inject",
266 .data = kgnilnd_sysctl.ksd_rca_inject,
267 .maxlen = GNILND_RCA_INJ_STRLEN,
269 .proc_handler = &proc_rca_inject,
274 static struct ctl_table kgnilnd_top_table[2] = {
277 .procname = "kgnilnd",
281 .child = kgnilnd_table
286 void kgnilnd_insert_sysctl(void)
288 if (kgnilnd_table_header == NULL)
289 kgnilnd_table_header = register_sysctl_table(kgnilnd_top_table);
292 void kgnilnd_remove_sysctl(void)
294 if (kgnilnd_table_header != NULL)
295 unregister_sysctl_table(kgnilnd_table_header);
297 kgnilnd_table_header = NULL;
301 void kgnilnd_insert_sysctl(void) {}
302 void kgnilnd_remove_sysctl(void) {}