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 #define OBD_SYSCTL 300
62 OBD_FAIL_LOC = 1, /* control test failures instrumentation */
63 OBD_FAIL_VAL, /* userdata for fail loc */
64 OBD_TIMEOUT, /* RPC timeout before recovery/intr */
65 OBD_DUMP_ON_TIMEOUT, /* dump kernel debug log upon eviction */
66 OBD_MEMUSED, /* bytes currently OBD_ALLOCated */
67 OBD_PAGESUSED, /* pages currently OBD_PAGE_ALLOCated */
68 OBD_MAXMEMUSED, /* maximum bytes OBD_ALLOCated concurrently */
69 OBD_MAXPAGESUSED, /* maximum pages OBD_PAGE_ALLOCated concurrently */
70 OBD_SYNCFILTER, /* XXX temporary, as we play with sync osts.. */
71 OBD_LDLM_TIMEOUT, /* LDLM timeout for ASTs before client eviction */
72 OBD_DUMP_ON_EVICTION, /* dump kernel debug log upon eviction */
73 OBD_DEBUG_PEER_ON_TIMEOUT, /* dump peer debug when RPC times out */
74 OBD_ALLOC_FAIL_RATE, /* memory allocation random failure rate */
75 OBD_MAX_DIRTY_PAGES, /* maximum dirty pages */
76 OBD_AT_MIN, /* Adaptive timeouts params */
83 int LL_PROC_PROTO(proc_fail_loc)
86 long old_fail_loc = obd_fail_loc;
88 rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
89 if (old_fail_loc != obd_fail_loc)
90 wake_up(&obd_race_waitq);
94 int LL_PROC_PROTO(proc_set_timeout)
98 rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
99 if (ldlm_timeout >= obd_timeout)
100 ldlm_timeout = max(obd_timeout / 3, 1U);
104 int LL_PROC_PROTO(proc_memory_alloc)
108 DECLARE_LL_PROC_PPOS_DECL;
110 if (!*lenp || (*ppos && !write)) {
117 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_memory_sum());
121 if (copy_to_user(buffer, buf, len))
128 int LL_PROC_PROTO(proc_pages_alloc)
132 DECLARE_LL_PROC_PPOS_DECL;
134 if (!*lenp || (*ppos && !write)) {
141 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_pages_sum());
145 if (copy_to_user(buffer, buf, len))
152 int LL_PROC_PROTO(proc_mem_max)
156 DECLARE_LL_PROC_PPOS_DECL;
158 if (!*lenp || (*ppos && !write)) {
165 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_memory_max());
169 if (copy_to_user(buffer, buf, len))
176 int LL_PROC_PROTO(proc_pages_max)
180 DECLARE_LL_PROC_PPOS_DECL;
182 if (!*lenp || (*ppos && !write)) {
189 len = snprintf(buf, sizeof(buf), LPU64"\n", obd_pages_max());
193 if (copy_to_user(buffer, buf, len))
200 int LL_PROC_PROTO(proc_max_dirty_pages_in_mb)
203 DECLARE_LL_PROC_PPOS_DECL;
205 if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
210 rc = lprocfs_write_frac_helper(buffer, *lenp,
211 (unsigned int*)table->data,
212 1 << (20 - CFS_PAGE_SHIFT));
213 /* Don't allow them to let dirty pages exceed 90% of system memory,
214 * and set a hard minimum of 4MB. */
215 if (obd_max_dirty_pages > ((num_physpages / 10) * 9)) {
216 CERROR("Refusing to set max dirty pages to %u, which "
217 "is more than 90%% of available RAM; setting to %lu\n",
218 obd_max_dirty_pages, ((num_physpages / 10) * 9));
219 obd_max_dirty_pages = ((num_physpages / 10) * 9);
220 } else if (obd_max_dirty_pages < 4 << (20 - CFS_PAGE_SHIFT)) {
221 obd_max_dirty_pages = 4 << (20 - CFS_PAGE_SHIFT);
227 len = lprocfs_read_frac_helper(buf, sizeof(buf),
228 *(unsigned int*)table->data,
229 1 << (20 - CFS_PAGE_SHIFT));
233 if (copy_to_user(buffer, buf, len))
241 #ifdef RANDOM_FAIL_ALLOC
242 int LL_PROC_PROTO(proc_alloc_fail_rate)
245 DECLARE_LL_PROC_PPOS_DECL;
247 if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
252 rc = lprocfs_write_frac_helper(buffer, *lenp,
253 (unsigned int*)table->data,
254 OBD_ALLOC_FAIL_MULT);
259 len = lprocfs_read_frac_helper(buf, 21,
260 *(unsigned int*)table->data,
261 OBD_ALLOC_FAIL_MULT);
265 if (copy_to_user(buffer, buf, len))
274 int LL_PROC_PROTO(proc_at_min)
276 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
278 int LL_PROC_PROTO(proc_at_max)
280 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
282 int LL_PROC_PROTO(proc_at_extra)
284 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
286 int LL_PROC_PROTO(proc_at_early_margin)
288 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
290 int LL_PROC_PROTO(proc_at_history)
292 return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos);
295 static cfs_sysctl_table_t obd_table[] = {
297 .ctl_name = OBD_FAIL_LOC,
298 .procname = "fail_loc",
299 .data = &obd_fail_loc,
300 .maxlen = sizeof(int),
302 .proc_handler = &proc_fail_loc
305 .ctl_name = OBD_FAIL_VAL,
306 .procname = "fail_val",
307 .data = &obd_fail_val,
308 .maxlen = sizeof(int),
310 .proc_handler = &proc_dointvec
313 .ctl_name = OBD_TIMEOUT,
314 .procname = "timeout",
315 .data = &obd_timeout,
316 .maxlen = sizeof(int),
318 .proc_handler = &proc_set_timeout
321 .ctl_name = OBD_DEBUG_PEER_ON_TIMEOUT,
322 .procname = "debug_peer_on_timeout",
323 .data = &obd_debug_peer_on_timeout,
324 .maxlen = sizeof(int),
326 .proc_handler = &proc_dointvec
329 .ctl_name = OBD_DUMP_ON_TIMEOUT,
330 .procname = "dump_on_timeout",
331 .data = &obd_dump_on_timeout,
332 .maxlen = sizeof(int),
334 .proc_handler = &proc_dointvec
337 .ctl_name = OBD_DUMP_ON_EVICTION,
338 .procname = "dump_on_eviction",
339 .data = &obd_dump_on_eviction,
340 .maxlen = sizeof(int),
342 .proc_handler = &proc_dointvec
345 .ctl_name = OBD_MEMUSED,
346 .procname = "memused",
350 .proc_handler = &proc_memory_alloc
353 .ctl_name = OBD_PAGESUSED,
354 .procname = "pagesused",
358 .proc_handler = &proc_pages_alloc
361 .ctl_name = OBD_MAXMEMUSED,
362 .procname = "memused_max",
366 .proc_handler = &proc_mem_max
369 .ctl_name = OBD_MAXPAGESUSED,
370 .procname = "pagesused_max",
374 .proc_handler = &proc_pages_max
377 .ctl_name = OBD_LDLM_TIMEOUT,
378 .procname = "ldlm_timeout",
379 .data = &ldlm_timeout,
380 .maxlen = sizeof(int),
382 .proc_handler = &proc_set_timeout
384 #ifdef RANDOM_FAIL_ALLOC
386 .ctl_name = OBD_ALLOC_FAIL_RATE,
387 .procname = "alloc_fail_rate",
388 .data = &obd_alloc_fail_rate,
389 .maxlen = sizeof(int),
391 .proc_handler = &proc_alloc_fail_rate
395 .ctl_name = OBD_MAX_DIRTY_PAGES,
396 .procname = "max_dirty_mb",
397 .data = &obd_max_dirty_pages,
398 .maxlen = sizeof(int),
400 .proc_handler = &proc_max_dirty_pages_in_mb
403 .ctl_name = OBD_AT_MIN,
404 .procname = "at_min",
406 .maxlen = sizeof(int),
408 .proc_handler = &proc_at_min
411 .ctl_name = OBD_AT_MAX,
412 .procname = "at_max",
414 .maxlen = sizeof(int),
416 .proc_handler = &proc_at_max
419 .ctl_name = OBD_AT_EXTRA,
420 .procname = "at_extra",
422 .maxlen = sizeof(int),
424 .proc_handler = &proc_at_extra
427 .ctl_name = OBD_AT_EARLY_MARGIN,
428 .procname = "at_early_margin",
429 .data = &at_early_margin,
430 .maxlen = sizeof(int),
432 .proc_handler = &proc_at_early_margin
435 .ctl_name = OBD_AT_HISTORY,
436 .procname = "at_history",
438 .maxlen = sizeof(int),
440 .proc_handler = &proc_at_history
445 static cfs_sysctl_table_t parent_table[] = {
447 .ctl_name = OBD_SYSCTL,
448 .procname = "lustre",
457 void obd_sysctl_init (void)
460 if ( !obd_table_header )
461 obd_table_header = cfs_register_sysctl_table(parent_table, 0);
465 void obd_sysctl_clean (void)
468 if ( obd_table_header )
469 cfs_unregister_sysctl_table(obd_table_header);
470 obd_table_header = NULL;