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 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
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/autoconf.h>
39 #include <linux/sysctl.h>
40 #include <linux/sched.h>
42 #include <linux/sysctl.h>
43 #include <linux/version.h>
44 #include <linux/proc_fs.h>
45 #include <linux/slab.h>
46 #include <linux/stat.h>
47 #include <linux/ctype.h>
48 #include <asm/bitops.h>
49 #include <asm/uaccess.h>
50 #include <linux/utsname.h>
52 #define DEBUG_SUBSYSTEM S_CLASS
54 #include <obd_support.h>
55 #include <lprocfs_status.h>
57 cfs_sysctl_table_header_t *obd_table_header = NULL;
59 #ifndef HAVE_SYSCTL_UNNUMBERED
61 #define OBD_SYSCTL 300
64 OBD_FAIL_LOC = 1, /* control test failures instrumentation */
65 OBD_FAIL_VAL, /* userdata for fail loc */
66 OBD_TIMEOUT, /* RPC timeout before recovery/intr */
67 OBD_DUMP_ON_TIMEOUT, /* dump kernel debug log upon eviction */
68 OBD_MEMUSED, /* bytes currently OBD_ALLOCated */
69 OBD_PAGESUSED, /* pages currently OBD_PAGE_ALLOCated */
70 OBD_MAXMEMUSED, /* maximum bytes OBD_ALLOCated concurrently */
71 OBD_MAXPAGESUSED, /* maximum pages OBD_PAGE_ALLOCated concurrently */
72 OBD_SYNCFILTER, /* XXX temporary, as we play with sync osts.. */
73 OBD_LDLM_TIMEOUT, /* LDLM timeout for ASTs before client eviction */
74 OBD_DUMP_ON_EVICTION, /* dump kernel debug log upon eviction */
75 OBD_DEBUG_PEER_ON_TIMEOUT, /* dump peer debug when RPC times out */
76 OBD_ALLOC_FAIL_RATE, /* memory allocation random failure rate */
77 OBD_MAX_DIRTY_PAGES, /* maximum dirty pages */
78 OBD_AT_MIN, /* Adaptive timeouts params */
87 #define OBD_SYSCTL CTL_UNNUMBERED
89 #define OBD_FAIL_LOC CTL_UNNUMBERED
90 #define OBD_FAIL_VAL CTL_UNNUMBERED
91 #define OBD_TIMEOUT CTL_UNNUMBERED
92 #define OBD_DUMP_ON_TIMEOUT CTL_UNNUMBERED
93 #define OBD_MEMUSED CTL_UNNUMBERED
94 #define OBD_PAGESUSED CTL_UNNUMBERED
95 #define OBD_MAXMEMUSED CTL_UNNUMBERED
96 #define OBD_MAXPAGESUSED CTL_UNNUMBERED
97 #define OBD_SYNCFILTER CTL_UNNUMBERED
98 #define OBD_LDLM_TIMEOUT CTL_UNNUMBERED
99 #define OBD_DUMP_ON_EVICTION CTL_UNNUMBERED
100 #define OBD_DEBUG_PEER_ON_TIMEOUT CTL_UNNUMBERED
101 #define OBD_ALLOC_FAIL_RATE CTL_UNNUMBERED
102 #define OBD_MAX_DIRTY_PAGES CTL_UNNUMBERED
103 #define OBD_AT_MIN CTL_UNNUMBERED
104 #define OBD_AT_MAX CTL_UNNUMBERED
105 #define OBD_AT_EXTRA CTL_UNNUMBERED
106 #define OBD_AT_EARLY_MARGIN CTL_UNNUMBERED
107 #define OBD_AT_HISTORY CTL_UNNUMBERED
112 int LL_PROC_PROTO(proc_fail_loc)
115 long old_fail_loc = obd_fail_loc;
117 rc = ll_proc_dolongvec(table, write, filp, buffer, lenp, ppos);
118 if (old_fail_loc != obd_fail_loc)
119 wake_up(&obd_race_waitq);
123 int LL_PROC_PROTO(proc_set_timeout)
127 rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
128 if (ldlm_timeout >= obd_timeout)
129 ldlm_timeout = max(obd_timeout / 3, 1U);
133 int LL_PROC_PROTO(proc_memory_alloc)
137 DECLARE_LL_PROC_PPOS_DECL;
139 if (!*lenp || (*ppos && !write)) {
146 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_memory_sum());
150 if (copy_to_user(buffer, buf, len))
157 int LL_PROC_PROTO(proc_pages_alloc)
161 DECLARE_LL_PROC_PPOS_DECL;
163 if (!*lenp || (*ppos && !write)) {
170 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_pages_sum());
174 if (copy_to_user(buffer, buf, len))
181 int LL_PROC_PROTO(proc_mem_max)
185 DECLARE_LL_PROC_PPOS_DECL;
187 if (!*lenp || (*ppos && !write)) {
194 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_memory_max());
198 if (copy_to_user(buffer, buf, len))
205 int LL_PROC_PROTO(proc_pages_max)
209 DECLARE_LL_PROC_PPOS_DECL;
211 if (!*lenp || (*ppos && !write)) {
218 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_pages_max());
222 if (copy_to_user(buffer, buf, len))
229 int LL_PROC_PROTO(proc_max_dirty_pages_in_mb)
232 DECLARE_LL_PROC_PPOS_DECL;
234 if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
239 rc = lprocfs_write_frac_helper(buffer, *lenp,
240 (unsigned int*)table->data,
241 1 << (20 - CFS_PAGE_SHIFT));
242 /* Don't allow them to let dirty pages exceed 90% of system memory,
243 * and set a hard minimum of 4MB. */
244 if (obd_max_dirty_pages > ((num_physpages / 10) * 9)) {
245 CERROR("Refusing to set max dirty pages to %u, which "
246 "is more than 90%% of available RAM; setting to %lu\n",
247 obd_max_dirty_pages, ((num_physpages / 10) * 9));
248 obd_max_dirty_pages = ((num_physpages / 10) * 9);
249 } else if (obd_max_dirty_pages < 4 << (20 - CFS_PAGE_SHIFT)) {
250 obd_max_dirty_pages = 4 << (20 - CFS_PAGE_SHIFT);
256 len = lprocfs_read_frac_helper(buf, sizeof(buf),
257 *(unsigned int*)table->data,
258 1 << (20 - CFS_PAGE_SHIFT));
262 if (copy_to_user(buffer, buf, len))
270 #ifdef RANDOM_FAIL_ALLOC
271 int LL_PROC_PROTO(proc_alloc_fail_rate)
274 DECLARE_LL_PROC_PPOS_DECL;
276 if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
281 rc = lprocfs_write_frac_helper(buffer, *lenp,
282 (unsigned int*)table->data,
283 OBD_ALLOC_FAIL_MULT);
288 len = lprocfs_read_frac_helper(buf, 21,
289 *(unsigned int*)table->data,
290 OBD_ALLOC_FAIL_MULT);
294 if (copy_to_user(buffer, buf, len))
303 int LL_PROC_PROTO(proc_at_min)
305 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
307 int LL_PROC_PROTO(proc_at_max)
309 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
311 int LL_PROC_PROTO(proc_at_extra)
313 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
315 int LL_PROC_PROTO(proc_at_early_margin)
317 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
319 int LL_PROC_PROTO(proc_at_history)
321 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
324 static cfs_sysctl_table_t obd_table[] = {
326 .ctl_name = OBD_FAIL_LOC,
327 .procname = "fail_loc",
328 .data = &obd_fail_loc,
329 .maxlen = sizeof(obd_fail_loc),
331 .proc_handler = &proc_fail_loc
334 .ctl_name = OBD_FAIL_VAL,
335 .procname = "fail_val",
336 .data = &obd_fail_val,
337 .maxlen = sizeof(int),
339 .proc_handler = &proc_dointvec
342 .ctl_name = OBD_TIMEOUT,
343 .procname = "timeout",
344 .data = &obd_timeout,
345 .maxlen = sizeof(int),
347 .proc_handler = &proc_set_timeout
350 .ctl_name = OBD_DEBUG_PEER_ON_TIMEOUT,
351 .procname = "debug_peer_on_timeout",
352 .data = &obd_debug_peer_on_timeout,
353 .maxlen = sizeof(int),
355 .proc_handler = &proc_dointvec
358 .ctl_name = OBD_DUMP_ON_TIMEOUT,
359 .procname = "dump_on_timeout",
360 .data = &obd_dump_on_timeout,
361 .maxlen = sizeof(int),
363 .proc_handler = &proc_dointvec
366 .ctl_name = OBD_DUMP_ON_EVICTION,
367 .procname = "dump_on_eviction",
368 .data = &obd_dump_on_eviction,
369 .maxlen = sizeof(int),
371 .proc_handler = &proc_dointvec
374 .ctl_name = OBD_MEMUSED,
375 .procname = "memused",
379 .proc_handler = &proc_memory_alloc
382 .ctl_name = OBD_PAGESUSED,
383 .procname = "pagesused",
387 .proc_handler = &proc_pages_alloc
390 .ctl_name = OBD_MAXMEMUSED,
391 .procname = "memused_max",
395 .proc_handler = &proc_mem_max
398 .ctl_name = OBD_MAXPAGESUSED,
399 .procname = "pagesused_max",
403 .proc_handler = &proc_pages_max
406 .ctl_name = OBD_LDLM_TIMEOUT,
407 .procname = "ldlm_timeout",
408 .data = &ldlm_timeout,
409 .maxlen = sizeof(int),
411 .proc_handler = &proc_set_timeout
413 #ifdef RANDOM_FAIL_ALLOC
415 .ctl_name = OBD_ALLOC_FAIL_RATE,
416 .procname = "alloc_fail_rate",
417 .data = &obd_alloc_fail_rate,
418 .maxlen = sizeof(int),
420 .proc_handler = &proc_alloc_fail_rate
424 .ctl_name = OBD_MAX_DIRTY_PAGES,
425 .procname = "max_dirty_mb",
426 .data = &obd_max_dirty_pages,
427 .maxlen = sizeof(int),
429 .proc_handler = &proc_max_dirty_pages_in_mb
432 .ctl_name = OBD_AT_MIN,
433 .procname = "at_min",
435 .maxlen = sizeof(int),
437 .proc_handler = &proc_at_min
440 .ctl_name = OBD_AT_MAX,
441 .procname = "at_max",
443 .maxlen = sizeof(int),
445 .proc_handler = &proc_at_max
448 .ctl_name = OBD_AT_EXTRA,
449 .procname = "at_extra",
451 .maxlen = sizeof(int),
453 .proc_handler = &proc_at_extra
456 .ctl_name = OBD_AT_EARLY_MARGIN,
457 .procname = "at_early_margin",
458 .data = &at_early_margin,
459 .maxlen = sizeof(int),
461 .proc_handler = &proc_at_early_margin
464 .ctl_name = OBD_AT_HISTORY,
465 .procname = "at_history",
467 .maxlen = sizeof(int),
469 .proc_handler = &proc_at_history
474 static cfs_sysctl_table_t parent_table[] = {
476 .ctl_name = OBD_SYSCTL,
477 .procname = "lustre",
486 void obd_sysctl_init (void)
489 if ( !obd_table_header )
490 obd_table_header = cfs_register_sysctl_table(parent_table, 0);
494 void obd_sysctl_clean (void)
497 if ( obd_table_header )
498 cfs_unregister_sysctl_table(obd_table_header);
499 obd_table_header = NULL;