4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
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30 * Copyright (c) 2011, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #include <linux/module.h>
38 #include <linux/sysctl.h>
39 #include <linux/sched.h>
41 #include <linux/proc_fs.h>
42 #include <linux/slab.h>
43 #include <linux/stat.h>
44 #include <linux/ctype.h>
45 #include <linux/bitops.h>
46 #include <linux/uaccess.h>
47 #include <linux/utsname.h>
49 #define DEBUG_SUBSYSTEM S_CLASS
51 #include "../../include/obd_support.h"
52 #include "../../include/lprocfs_status.h"
55 static struct ctl_table_header *obd_table_header;
59 #define OBD_SYSCTL 300
62 OBD_TIMEOUT = 3, /* RPC timeout before recovery/intr */
63 OBD_DUMP_ON_TIMEOUT, /* dump kernel debug log upon eviction */
64 OBD_MEMUSED, /* bytes currently OBD_ALLOCated */
65 OBD_PAGESUSED, /* pages currently OBD_PAGE_ALLOCated */
66 OBD_MAXMEMUSED, /* maximum bytes OBD_ALLOCated concurrently */
67 OBD_MAXPAGESUSED, /* maximum pages OBD_PAGE_ALLOCated concurrently */
68 OBD_SYNCFILTER, /* XXX temporary, as we play with sync osts.. */
69 OBD_LDLM_TIMEOUT, /* LDLM timeout for ASTs before client eviction */
70 OBD_DUMP_ON_EVICTION, /* dump kernel debug log upon eviction */
71 OBD_DEBUG_PEER_ON_TIMEOUT, /* dump peer debug when RPC times out */
72 OBD_ALLOC_FAIL_RATE, /* memory allocation random failure rate */
73 OBD_MAX_DIRTY_PAGES, /* maximum dirty pages */
74 OBD_AT_MIN, /* Adaptive timeouts params */
83 static int proc_set_timeout(struct ctl_table *table, int write,
84 void __user *buffer, size_t *lenp, loff_t *ppos)
88 rc = proc_dointvec(table, write, buffer, lenp, ppos);
89 if (ldlm_timeout >= obd_timeout)
90 ldlm_timeout = max(obd_timeout / 3, 1U);
94 static int proc_memory_alloc(struct ctl_table *table, int write,
95 void __user *buffer, size_t *lenp, loff_t *ppos)
100 if (!*lenp || (*ppos && !write)) {
107 len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_sum());
111 if (copy_to_user(buffer, buf, len))
118 static int proc_pages_alloc(struct ctl_table *table, int write,
119 void __user *buffer, size_t *lenp, loff_t *ppos)
124 if (!*lenp || (*ppos && !write)) {
131 len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_sum());
135 if (copy_to_user(buffer, buf, len))
142 static int proc_mem_max(struct ctl_table *table, int write, void __user *buffer,
143 size_t *lenp, loff_t *ppos)
148 if (!*lenp || (*ppos && !write)) {
155 len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_max());
159 if (copy_to_user(buffer, buf, len))
166 static int proc_pages_max(struct ctl_table *table, int write,
167 void __user *buffer, size_t *lenp, loff_t *ppos)
172 if (!*lenp || (*ppos && !write)) {
179 len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_max());
183 if (copy_to_user(buffer, buf, len))
190 static int proc_max_dirty_pages_in_mb(struct ctl_table *table, int write,
191 void __user *buffer, size_t *lenp, loff_t *ppos)
195 if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
200 rc = lprocfs_write_frac_helper(buffer, *lenp,
201 (unsigned int *)table->data,
202 1 << (20 - PAGE_CACHE_SHIFT));
203 /* Don't allow them to let dirty pages exceed 90% of system
204 * memory and set a hard minimum of 4MB. */
205 if (obd_max_dirty_pages > ((totalram_pages / 10) * 9)) {
206 CERROR("Refusing to set max dirty pages to %u, which is more than 90%% of available RAM; setting to %lu\n",
208 ((totalram_pages / 10) * 9));
209 obd_max_dirty_pages = (totalram_pages / 10) * 9;
210 } else if (obd_max_dirty_pages < 4 << (20 - PAGE_CACHE_SHIFT)) {
211 obd_max_dirty_pages = 4 << (20 - PAGE_CACHE_SHIFT);
217 len = lprocfs_read_frac_helper(buf, sizeof(buf),
218 *(unsigned int *)table->data,
219 1 << (20 - PAGE_CACHE_SHIFT));
223 if (copy_to_user(buffer, buf, len))
231 static int proc_alloc_fail_rate(struct ctl_table *table, int write,
232 void __user *buffer, size_t *lenp, loff_t *ppos)
236 if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
241 rc = lprocfs_write_frac_helper(buffer, *lenp,
242 (unsigned int *)table->data,
243 OBD_ALLOC_FAIL_MULT);
248 len = lprocfs_read_frac_helper(buf, 21,
249 *(unsigned int *)table->data,
250 OBD_ALLOC_FAIL_MULT);
254 if (copy_to_user(buffer, buf, len))
262 static struct ctl_table obd_table[] = {
264 .procname = "timeout",
265 .data = &obd_timeout,
266 .maxlen = sizeof(int),
268 .proc_handler = &proc_set_timeout
271 .procname = "debug_peer_on_timeout",
272 .data = &obd_debug_peer_on_timeout,
273 .maxlen = sizeof(int),
275 .proc_handler = &proc_dointvec
278 .procname = "dump_on_timeout",
279 .data = &obd_dump_on_timeout,
280 .maxlen = sizeof(int),
282 .proc_handler = &proc_dointvec
285 .procname = "dump_on_eviction",
286 .data = &obd_dump_on_eviction,
287 .maxlen = sizeof(int),
289 .proc_handler = &proc_dointvec
292 .procname = "memused",
296 .proc_handler = &proc_memory_alloc
299 .procname = "pagesused",
303 .proc_handler = &proc_pages_alloc
306 .procname = "memused_max",
310 .proc_handler = &proc_mem_max
313 .procname = "pagesused_max",
317 .proc_handler = &proc_pages_max
320 .procname = "ldlm_timeout",
321 .data = &ldlm_timeout,
322 .maxlen = sizeof(int),
324 .proc_handler = &proc_set_timeout
327 .procname = "alloc_fail_rate",
328 .data = &obd_alloc_fail_rate,
329 .maxlen = sizeof(int),
331 .proc_handler = &proc_alloc_fail_rate
334 .procname = "max_dirty_mb",
335 .data = &obd_max_dirty_pages,
336 .maxlen = sizeof(int),
338 .proc_handler = &proc_max_dirty_pages_in_mb
341 .procname = "at_min",
343 .maxlen = sizeof(int),
345 .proc_handler = &proc_dointvec,
348 .procname = "at_max",
350 .maxlen = sizeof(int),
352 .proc_handler = &proc_dointvec,
355 .procname = "at_extra",
357 .maxlen = sizeof(int),
359 .proc_handler = &proc_dointvec,
362 .procname = "at_early_margin",
363 .data = &at_early_margin,
364 .maxlen = sizeof(int),
366 .proc_handler = &proc_dointvec,
369 .procname = "at_history",
371 .maxlen = sizeof(int),
373 .proc_handler = &proc_dointvec,
378 static struct ctl_table parent_table[] = {
380 .procname = "lustre",
390 void obd_sysctl_init(void)
393 if (!obd_table_header)
394 obd_table_header = register_sysctl_table(parent_table);
398 void obd_sysctl_clean(void)
401 if (obd_table_header)
402 unregister_sysctl_table(obd_table_header);
403 obd_table_header = NULL;