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d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
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. | |
9 | * | |
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). | |
15 | * | |
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 | |
19 | * | |
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 | |
22 | * have any questions. | |
23 | * | |
24 | * GPL HEADER END | |
25 | */ | |
26 | /* | |
27 | * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
29 | * | |
30 | * Copyright (c) 2011, Intel Corporation. | |
31 | */ | |
32 | /* | |
33 | * This file is part of Lustre, http://www.lustre.org/ | |
34 | * Lustre is a trademark of Sun Microsystems, Inc. | |
35 | */ | |
36 | ||
37 | #include <linux/module.h> | |
38 | #include <linux/sysctl.h> | |
39 | #include <linux/sched.h> | |
40 | #include <linux/mm.h> | |
d7e09d03 PT |
41 | #include <linux/proc_fs.h> |
42 | #include <linux/slab.h> | |
43 | #include <linux/stat.h> | |
44 | #include <linux/ctype.h> | |
45 | #include <asm/bitops.h> | |
46 | #include <asm/uaccess.h> | |
47 | #include <linux/utsname.h> | |
48 | ||
49 | #define DEBUG_SUBSYSTEM S_CLASS | |
50 | ||
51 | #include <obd_support.h> | |
52 | #include <lprocfs_status.h> | |
53 | ||
54 | #ifdef CONFIG_SYSCTL | |
55 | ctl_table_header_t *obd_table_header = NULL; | |
56 | #endif | |
57 | ||
58 | ||
59 | #define OBD_SYSCTL 300 | |
60 | ||
61 | enum { | |
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 */ | |
75 | OBD_AT_MAX, | |
76 | OBD_AT_EXTRA, | |
77 | OBD_AT_EARLY_MARGIN, | |
78 | OBD_AT_HISTORY, | |
79 | }; | |
80 | ||
81 | ||
82 | int LL_PROC_PROTO(proc_set_timeout) | |
83 | { | |
84 | int rc; | |
85 | ||
86 | rc = ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
87 | if (ldlm_timeout >= obd_timeout) | |
88 | ldlm_timeout = max(obd_timeout / 3, 1U); | |
89 | return rc; | |
90 | } | |
91 | ||
92 | int LL_PROC_PROTO(proc_memory_alloc) | |
93 | { | |
94 | char buf[22]; | |
95 | int len; | |
96 | DECLARE_LL_PROC_PPOS_DECL; | |
97 | ||
98 | if (!*lenp || (*ppos && !write)) { | |
99 | *lenp = 0; | |
100 | return 0; | |
101 | } | |
102 | if (write) | |
103 | return -EINVAL; | |
104 | ||
105 | len = snprintf(buf, sizeof(buf), LPU64"\n", obd_memory_sum()); | |
106 | if (len > *lenp) | |
107 | len = *lenp; | |
108 | buf[len] = '\0'; | |
109 | if (copy_to_user(buffer, buf, len)) | |
110 | return -EFAULT; | |
111 | *lenp = len; | |
112 | *ppos += *lenp; | |
113 | return 0; | |
114 | } | |
115 | ||
116 | int LL_PROC_PROTO(proc_pages_alloc) | |
117 | { | |
118 | char buf[22]; | |
119 | int len; | |
120 | DECLARE_LL_PROC_PPOS_DECL; | |
121 | ||
122 | if (!*lenp || (*ppos && !write)) { | |
123 | *lenp = 0; | |
124 | return 0; | |
125 | } | |
126 | if (write) | |
127 | return -EINVAL; | |
128 | ||
129 | len = snprintf(buf, sizeof(buf), LPU64"\n", obd_pages_sum()); | |
130 | if (len > *lenp) | |
131 | len = *lenp; | |
132 | buf[len] = '\0'; | |
133 | if (copy_to_user(buffer, buf, len)) | |
134 | return -EFAULT; | |
135 | *lenp = len; | |
136 | *ppos += *lenp; | |
137 | return 0; | |
138 | } | |
139 | ||
140 | int LL_PROC_PROTO(proc_mem_max) | |
141 | { | |
142 | char buf[22]; | |
143 | int len; | |
144 | DECLARE_LL_PROC_PPOS_DECL; | |
145 | ||
146 | if (!*lenp || (*ppos && !write)) { | |
147 | *lenp = 0; | |
148 | return 0; | |
149 | } | |
150 | if (write) | |
151 | return -EINVAL; | |
152 | ||
153 | len = snprintf(buf, sizeof(buf), LPU64"\n", obd_memory_max()); | |
154 | if (len > *lenp) | |
155 | len = *lenp; | |
156 | buf[len] = '\0'; | |
157 | if (copy_to_user(buffer, buf, len)) | |
158 | return -EFAULT; | |
159 | *lenp = len; | |
160 | *ppos += *lenp; | |
161 | return 0; | |
162 | } | |
163 | ||
164 | int LL_PROC_PROTO(proc_pages_max) | |
165 | { | |
166 | char buf[22]; | |
167 | int len; | |
168 | DECLARE_LL_PROC_PPOS_DECL; | |
169 | ||
170 | if (!*lenp || (*ppos && !write)) { | |
171 | *lenp = 0; | |
172 | return 0; | |
173 | } | |
174 | if (write) | |
175 | return -EINVAL; | |
176 | ||
177 | len = snprintf(buf, sizeof(buf), LPU64"\n", obd_pages_max()); | |
178 | if (len > *lenp) | |
179 | len = *lenp; | |
180 | buf[len] = '\0'; | |
181 | if (copy_to_user(buffer, buf, len)) | |
182 | return -EFAULT; | |
183 | *lenp = len; | |
184 | *ppos += *lenp; | |
185 | return 0; | |
186 | } | |
187 | ||
188 | int LL_PROC_PROTO(proc_max_dirty_pages_in_mb) | |
189 | { | |
190 | int rc = 0; | |
191 | DECLARE_LL_PROC_PPOS_DECL; | |
192 | ||
193 | if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
194 | *lenp = 0; | |
195 | return 0; | |
196 | } | |
197 | if (write) { | |
198 | rc = lprocfs_write_frac_helper(buffer, *lenp, | |
199 | (unsigned int*)table->data, | |
200 | 1 << (20 - PAGE_CACHE_SHIFT)); | |
201 | /* Don't allow them to let dirty pages exceed 90% of system | |
202 | * memory and set a hard minimum of 4MB. */ | |
4f6cc9ab | 203 | if (obd_max_dirty_pages > ((totalram_pages / 10) * 9)) { |
d7e09d03 PT |
204 | CERROR("Refusing to set max dirty pages to %u, which " |
205 | "is more than 90%% of available RAM; setting " | |
206 | "to %lu\n", obd_max_dirty_pages, | |
4f6cc9ab PT |
207 | ((totalram_pages / 10) * 9)); |
208 | obd_max_dirty_pages = ((totalram_pages / 10) * 9); | |
d7e09d03 PT |
209 | } else if (obd_max_dirty_pages < 4 << (20 - PAGE_CACHE_SHIFT)) { |
210 | obd_max_dirty_pages = 4 << (20 - PAGE_CACHE_SHIFT); | |
211 | } | |
212 | } else { | |
213 | char buf[21]; | |
214 | int len; | |
215 | ||
216 | len = lprocfs_read_frac_helper(buf, sizeof(buf), | |
217 | *(unsigned int*)table->data, | |
218 | 1 << (20 - PAGE_CACHE_SHIFT)); | |
219 | if (len > *lenp) | |
220 | len = *lenp; | |
221 | buf[len] = '\0'; | |
222 | if (copy_to_user(buffer, buf, len)) | |
223 | return -EFAULT; | |
224 | *lenp = len; | |
225 | } | |
226 | *ppos += *lenp; | |
227 | return rc; | |
228 | } | |
229 | ||
230 | int LL_PROC_PROTO(proc_alloc_fail_rate) | |
231 | { | |
232 | int rc = 0; | |
233 | DECLARE_LL_PROC_PPOS_DECL; | |
234 | ||
235 | if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
236 | *lenp = 0; | |
237 | return 0; | |
238 | } | |
239 | if (write) { | |
240 | rc = lprocfs_write_frac_helper(buffer, *lenp, | |
241 | (unsigned int*)table->data, | |
242 | OBD_ALLOC_FAIL_MULT); | |
243 | } else { | |
244 | char buf[21]; | |
245 | int len; | |
246 | ||
247 | len = lprocfs_read_frac_helper(buf, 21, | |
248 | *(unsigned int*)table->data, | |
249 | OBD_ALLOC_FAIL_MULT); | |
250 | if (len > *lenp) | |
251 | len = *lenp; | |
252 | buf[len] = '\0'; | |
253 | if (copy_to_user(buffer, buf, len)) | |
254 | return -EFAULT; | |
255 | *lenp = len; | |
256 | } | |
257 | *ppos += *lenp; | |
258 | return rc; | |
259 | } | |
260 | ||
261 | int LL_PROC_PROTO(proc_at_min) | |
262 | { | |
263 | return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
264 | } | |
265 | int LL_PROC_PROTO(proc_at_max) | |
266 | { | |
267 | return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
268 | } | |
269 | int LL_PROC_PROTO(proc_at_extra) | |
270 | { | |
271 | return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
272 | } | |
273 | int LL_PROC_PROTO(proc_at_early_margin) | |
274 | { | |
275 | return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
276 | } | |
277 | int LL_PROC_PROTO(proc_at_history) | |
278 | { | |
279 | return ll_proc_dointvec(table, write, filp, buffer, lenp, ppos); | |
280 | } | |
281 | ||
282 | #ifdef CONFIG_SYSCTL | |
283 | static ctl_table_t obd_table[] = { | |
284 | { | |
d7e09d03 PT |
285 | .procname = "timeout", |
286 | .data = &obd_timeout, | |
287 | .maxlen = sizeof(int), | |
288 | .mode = 0644, | |
289 | .proc_handler = &proc_set_timeout | |
290 | }, | |
291 | { | |
d7e09d03 PT |
292 | .procname = "debug_peer_on_timeout", |
293 | .data = &obd_debug_peer_on_timeout, | |
294 | .maxlen = sizeof(int), | |
295 | .mode = 0644, | |
296 | .proc_handler = &proc_dointvec | |
297 | }, | |
298 | { | |
d7e09d03 PT |
299 | .procname = "dump_on_timeout", |
300 | .data = &obd_dump_on_timeout, | |
301 | .maxlen = sizeof(int), | |
302 | .mode = 0644, | |
303 | .proc_handler = &proc_dointvec | |
304 | }, | |
305 | { | |
d7e09d03 PT |
306 | .procname = "dump_on_eviction", |
307 | .data = &obd_dump_on_eviction, | |
308 | .maxlen = sizeof(int), | |
309 | .mode = 0644, | |
310 | .proc_handler = &proc_dointvec | |
311 | }, | |
312 | { | |
d7e09d03 PT |
313 | .procname = "memused", |
314 | .data = NULL, | |
315 | .maxlen = 0, | |
316 | .mode = 0444, | |
317 | .proc_handler = &proc_memory_alloc | |
318 | }, | |
319 | { | |
d7e09d03 PT |
320 | .procname = "pagesused", |
321 | .data = NULL, | |
322 | .maxlen = 0, | |
323 | .mode = 0444, | |
324 | .proc_handler = &proc_pages_alloc | |
325 | }, | |
326 | { | |
d7e09d03 PT |
327 | .procname = "memused_max", |
328 | .data = NULL, | |
329 | .maxlen = 0, | |
330 | .mode = 0444, | |
331 | .proc_handler = &proc_mem_max | |
332 | }, | |
333 | { | |
d7e09d03 PT |
334 | .procname = "pagesused_max", |
335 | .data = NULL, | |
336 | .maxlen = 0, | |
337 | .mode = 0444, | |
338 | .proc_handler = &proc_pages_max | |
339 | }, | |
340 | { | |
d7e09d03 PT |
341 | .procname = "ldlm_timeout", |
342 | .data = &ldlm_timeout, | |
343 | .maxlen = sizeof(int), | |
344 | .mode = 0644, | |
345 | .proc_handler = &proc_set_timeout | |
346 | }, | |
347 | { | |
d7e09d03 PT |
348 | .procname = "alloc_fail_rate", |
349 | .data = &obd_alloc_fail_rate, | |
350 | .maxlen = sizeof(int), | |
351 | .mode = 0644, | |
352 | .proc_handler = &proc_alloc_fail_rate | |
353 | }, | |
354 | { | |
d7e09d03 PT |
355 | .procname = "max_dirty_mb", |
356 | .data = &obd_max_dirty_pages, | |
357 | .maxlen = sizeof(int), | |
358 | .mode = 0644, | |
359 | .proc_handler = &proc_max_dirty_pages_in_mb | |
360 | }, | |
361 | { | |
d7e09d03 PT |
362 | .procname = "at_min", |
363 | .data = &at_min, | |
364 | .maxlen = sizeof(int), | |
365 | .mode = 0644, | |
366 | .proc_handler = &proc_at_min | |
367 | }, | |
368 | { | |
d7e09d03 PT |
369 | .procname = "at_max", |
370 | .data = &at_max, | |
371 | .maxlen = sizeof(int), | |
372 | .mode = 0644, | |
373 | .proc_handler = &proc_at_max | |
374 | }, | |
375 | { | |
d7e09d03 PT |
376 | .procname = "at_extra", |
377 | .data = &at_extra, | |
378 | .maxlen = sizeof(int), | |
379 | .mode = 0644, | |
380 | .proc_handler = &proc_at_extra | |
381 | }, | |
382 | { | |
d7e09d03 PT |
383 | .procname = "at_early_margin", |
384 | .data = &at_early_margin, | |
385 | .maxlen = sizeof(int), | |
386 | .mode = 0644, | |
387 | .proc_handler = &proc_at_early_margin | |
388 | }, | |
389 | { | |
d7e09d03 PT |
390 | .procname = "at_history", |
391 | .data = &at_history, | |
392 | .maxlen = sizeof(int), | |
393 | .mode = 0644, | |
394 | .proc_handler = &proc_at_history | |
e780e3de PT |
395 | }, |
396 | {} | |
d7e09d03 PT |
397 | }; |
398 | ||
399 | static ctl_table_t parent_table[] = { | |
400 | { | |
d7e09d03 PT |
401 | .procname = "lustre", |
402 | .data = NULL, | |
403 | .maxlen = 0, | |
404 | .mode = 0555, | |
405 | .child = obd_table | |
e780e3de PT |
406 | }, |
407 | {} | |
d7e09d03 PT |
408 | }; |
409 | #endif | |
410 | ||
411 | void obd_sysctl_init (void) | |
412 | { | |
413 | #ifdef CONFIG_SYSCTL | |
414 | if ( !obd_table_header ) | |
a7f24447 | 415 | obd_table_header = register_sysctl_table(parent_table); |
d7e09d03 PT |
416 | #endif |
417 | } | |
418 | ||
419 | void obd_sysctl_clean (void) | |
420 | { | |
421 | #ifdef CONFIG_SYSCTL | |
422 | if ( obd_table_header ) | |
423 | unregister_sysctl_table(obd_table_header); | |
424 | obd_table_header = NULL; | |
425 | #endif | |
426 | } |