1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
39 #include <linux/module.h>
40 #include <linux/sysctl.h>
41 #include <linux/sched.h>
43 #include <linux/sysctl.h>
44 #include <linux/version.h>
45 #include <linux/proc_fs.h>
46 #include <linux/slab.h>
47 #include <linux/stat.h>
48 #include <linux/ctype.h>
49 #include <asm/bitops.h>
50 #include <asm/uaccess.h>
51 #include <linux/utsname.h>
53 #define DEBUG_SUBSYSTEM S_CLASS
55 #include <obd_support.h>
56 #include <lprocfs_status.h>
59 cfs_sysctl_table_header_t *obd_table_header = NULL;
62 #ifndef HAVE_SYSCTL_UNNUMBERED
64 #define OBD_SYSCTL 300
67 OBD_TIMEOUT = 3, /* RPC timeout before recovery/intr */
68 OBD_DUMP_ON_TIMEOUT, /* dump kernel debug log upon eviction */
69 OBD_MEMUSED, /* bytes currently OBD_ALLOCated */
70 OBD_PAGESUSED, /* pages currently OBD_PAGE_ALLOCated */
71 OBD_MAXMEMUSED, /* maximum bytes OBD_ALLOCated concurrently */
72 OBD_MAXPAGESUSED, /* maximum pages OBD_PAGE_ALLOCated concurrently */
73 OBD_SYNCFILTER, /* XXX temporary, as we play with sync osts.. */
74 OBD_LDLM_TIMEOUT, /* LDLM timeout for ASTs before client eviction */
75 OBD_DUMP_ON_EVICTION, /* dump kernel debug log upon eviction */
76 OBD_DEBUG_PEER_ON_TIMEOUT, /* dump peer debug when RPC times out */
77 OBD_ALLOC_FAIL_RATE, /* memory allocation random failure rate */
78 OBD_MAX_DIRTY_PAGES, /* maximum dirty pages */
79 OBD_AT_MIN, /* Adaptive timeouts params */
88 #define OBD_SYSCTL CTL_UNNUMBERED
90 #define OBD_FAIL_LOC CTL_UNNUMBERED
91 #define OBD_FAIL_VAL CTL_UNNUMBERED
92 #define OBD_TIMEOUT CTL_UNNUMBERED
93 #define OBD_DUMP_ON_TIMEOUT CTL_UNNUMBERED
94 #define OBD_MEMUSED CTL_UNNUMBERED
95 #define OBD_PAGESUSED CTL_UNNUMBERED
96 #define OBD_MAXMEMUSED CTL_UNNUMBERED
97 #define OBD_MAXPAGESUSED CTL_UNNUMBERED
98 #define OBD_SYNCFILTER CTL_UNNUMBERED
99 #define OBD_LDLM_TIMEOUT CTL_UNNUMBERED
100 #define OBD_DUMP_ON_EVICTION CTL_UNNUMBERED
101 #define OBD_DEBUG_PEER_ON_TIMEOUT CTL_UNNUMBERED
102 #define OBD_ALLOC_FAIL_RATE CTL_UNNUMBERED
103 #define OBD_MAX_DIRTY_PAGES CTL_UNNUMBERED
104 #define OBD_AT_MIN CTL_UNNUMBERED
105 #define OBD_AT_MAX CTL_UNNUMBERED
106 #define OBD_AT_EXTRA CTL_UNNUMBERED
107 #define OBD_AT_EARLY_MARGIN CTL_UNNUMBERED
108 #define OBD_AT_HISTORY CTL_UNNUMBERED
112 int LL_PROC_PROTO(proc_set_timeout)
116 rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
117 if (ldlm_timeout >= obd_timeout)
118 ldlm_timeout = max(obd_timeout / 3, 1U);
122 int LL_PROC_PROTO(proc_memory_alloc)
126 DECLARE_LL_PROC_PPOS_DECL;
128 if (!*lenp || (*ppos && !write)) {
135 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_memory_sum());
139 if (cfs_copy_to_user(buffer, buf, len))
146 int LL_PROC_PROTO(proc_pages_alloc)
150 DECLARE_LL_PROC_PPOS_DECL;
152 if (!*lenp || (*ppos && !write)) {
159 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_pages_sum());
163 if (cfs_copy_to_user(buffer, buf, len))
170 int LL_PROC_PROTO(proc_mem_max)
174 DECLARE_LL_PROC_PPOS_DECL;
176 if (!*lenp || (*ppos && !write)) {
183 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_memory_max());
187 if (cfs_copy_to_user(buffer, buf, len))
194 int LL_PROC_PROTO(proc_pages_max)
198 DECLARE_LL_PROC_PPOS_DECL;
200 if (!*lenp || (*ppos && !write)) {
207 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_pages_max());
211 if (cfs_copy_to_user(buffer, buf, len))
218 int LL_PROC_PROTO(proc_max_dirty_pages_in_mb)
221 DECLARE_LL_PROC_PPOS_DECL;
223 if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
228 rc = lprocfs_write_frac_helper(buffer, *lenp,
229 (unsigned int*)table->data,
230 1 << (20 - CFS_PAGE_SHIFT));
231 /* Don't allow them to let dirty pages exceed 90% of system
232 * memory and set a hard minimum of 4MB. */
233 if (obd_max_dirty_pages > ((cfs_num_physpages / 10) * 9)) {
234 CERROR("Refusing to set max dirty pages to %u, which "
235 "is more than 90%% of available RAM; setting "
236 "to %lu\n", obd_max_dirty_pages,
237 ((cfs_num_physpages / 10) * 9));
238 obd_max_dirty_pages = ((cfs_num_physpages / 10) * 9);
239 } else if (obd_max_dirty_pages < 4 << (20 - CFS_PAGE_SHIFT)) {
240 obd_max_dirty_pages = 4 << (20 - CFS_PAGE_SHIFT);
246 len = lprocfs_read_frac_helper(buf, sizeof(buf),
247 *(unsigned int*)table->data,
248 1 << (20 - CFS_PAGE_SHIFT));
252 if (cfs_copy_to_user(buffer, buf, len))
260 #ifdef RANDOM_FAIL_ALLOC
261 int LL_PROC_PROTO(proc_alloc_fail_rate)
264 DECLARE_LL_PROC_PPOS_DECL;
266 if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
271 rc = lprocfs_write_frac_helper(buffer, *lenp,
272 (unsigned int*)table->data,
273 OBD_ALLOC_FAIL_MULT);
278 len = lprocfs_read_frac_helper(buf, 21,
279 *(unsigned int*)table->data,
280 OBD_ALLOC_FAIL_MULT);
284 if (cfs_copy_to_user(buffer, buf, len))
293 int LL_PROC_PROTO(proc_at_min)
295 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
297 int LL_PROC_PROTO(proc_at_max)
299 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
301 int LL_PROC_PROTO(proc_at_extra)
303 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
305 int LL_PROC_PROTO(proc_at_early_margin)
307 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
309 int LL_PROC_PROTO(proc_at_history)
311 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
315 static cfs_sysctl_table_t obd_table[] = {
317 INIT_CTL_NAME(OBD_TIMEOUT)
318 .procname = "timeout",
319 .data = &obd_timeout,
320 .maxlen = sizeof(int),
322 .proc_handler = &proc_set_timeout
325 INIT_CTL_NAME(OBD_DEBUG_PEER_ON_TIMEOUT)
326 .procname = "debug_peer_on_timeout",
327 .data = &obd_debug_peer_on_timeout,
328 .maxlen = sizeof(int),
330 .proc_handler = &proc_dointvec
333 INIT_CTL_NAME(OBD_DUMP_ON_TIMEOUT)
334 .procname = "dump_on_timeout",
335 .data = &obd_dump_on_timeout,
336 .maxlen = sizeof(int),
338 .proc_handler = &proc_dointvec
341 INIT_CTL_NAME(OBD_DUMP_ON_EVICTION)
342 .procname = "dump_on_eviction",
343 .data = &obd_dump_on_eviction,
344 .maxlen = sizeof(int),
346 .proc_handler = &proc_dointvec
349 INIT_CTL_NAME(OBD_MEMUSED)
350 .procname = "memused",
354 .proc_handler = &proc_memory_alloc
357 INIT_CTL_NAME(OBD_PAGESUSED)
358 .procname = "pagesused",
362 .proc_handler = &proc_pages_alloc
365 INIT_CTL_NAME(OBD_MAXMEMUSED)
366 .procname = "memused_max",
370 .proc_handler = &proc_mem_max
373 INIT_CTL_NAME(OBD_MAXPAGESUSED)
374 .procname = "pagesused_max",
378 .proc_handler = &proc_pages_max
381 INIT_CTL_NAME(OBD_LDLM_TIMEOUT)
382 .procname = "ldlm_timeout",
383 .data = &ldlm_timeout,
384 .maxlen = sizeof(int),
386 .proc_handler = &proc_set_timeout
388 #ifdef RANDOM_FAIL_ALLOC
390 INIT_CTL_NAME(OBD_ALLOC_FAIL_RATE)
391 .procname = "alloc_fail_rate",
392 .data = &obd_alloc_fail_rate,
393 .maxlen = sizeof(int),
395 .proc_handler = &proc_alloc_fail_rate
399 INIT_CTL_NAME(OBD_MAX_DIRTY_PAGES)
400 .procname = "max_dirty_mb",
401 .data = &obd_max_dirty_pages,
402 .maxlen = sizeof(int),
404 .proc_handler = &proc_max_dirty_pages_in_mb
407 INIT_CTL_NAME(OBD_AT_MIN)
408 .procname = "at_min",
410 .maxlen = sizeof(int),
412 .proc_handler = &proc_at_min
415 INIT_CTL_NAME(OBD_AT_MAX)
416 .procname = "at_max",
418 .maxlen = sizeof(int),
420 .proc_handler = &proc_at_max
423 INIT_CTL_NAME(OBD_AT_EXTRA)
424 .procname = "at_extra",
426 .maxlen = sizeof(int),
428 .proc_handler = &proc_at_extra
431 INIT_CTL_NAME(OBD_AT_EARLY_MARGIN)
432 .procname = "at_early_margin",
433 .data = &at_early_margin,
434 .maxlen = sizeof(int),
436 .proc_handler = &proc_at_early_margin
439 INIT_CTL_NAME(OBD_AT_HISTORY)
440 .procname = "at_history",
442 .maxlen = sizeof(int),
444 .proc_handler = &proc_at_history
449 static cfs_sysctl_table_t parent_table[] = {
451 INIT_CTL_NAME(OBD_SYSCTL)
452 .procname = "lustre",
462 void obd_sysctl_init (void)
465 if ( !obd_table_header )
466 obd_table_header = cfs_register_sysctl_table(parent_table, 0);
470 void obd_sysctl_clean (void)
473 if ( obd_table_header )
474 cfs_unregister_sysctl_table(obd_table_header);
475 obd_table_header = NULL;