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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * libcfs/libcfs/linux/linux-proc.c
38 * Author: Zach Brown <zab@zabbo.net>
39 * Author: Peter J. Braam <braam@clusterfs.com>
40 * Author: Phil Schwan <phil@clusterfs.com>
43 #include <linux/module.h>
44 #include <linux/kernel.h>
46 #include <linux/string.h>
47 #include <linux/stat.h>
48 #include <linux/errno.h>
49 #include <linux/unistd.h>
51 #include <linux/uio.h>
53 #include <asm/uaccess.h>
56 #include <linux/file.h>
57 #include <linux/stat.h>
58 #include <linux/list.h>
59 #include <asm/uaccess.h>
61 #include <linux/proc_fs.h>
62 #include <linux/sysctl.h>
64 # define DEBUG_SUBSYSTEM S_LNET
66 #include <linux/libcfs/libcfs.h>
67 #include <asm/div64.h>
68 #include "tracefile.h"
71 static ctl_table_header_t *lnet_table_header = NULL;
73 extern char lnet_upcall[1024];
75 * The path of debug log dump upcall script.
77 extern char lnet_debug_log_upcall[1024];
79 #define CTL_LNET (0x100)
81 PSDEV_DEBUG = 1, /* control debugging */
82 PSDEV_SUBSYSTEM_DEBUG, /* control debugging */
83 PSDEV_PRINTK, /* force all messages to console */
84 PSDEV_CONSOLE_RATELIMIT, /* ratelimit console messages */
85 PSDEV_CONSOLE_MAX_DELAY_CS, /* maximum delay over which we skip messages */
86 PSDEV_CONSOLE_MIN_DELAY_CS, /* initial delay over which we skip messages */
87 PSDEV_CONSOLE_BACKOFF, /* delay increase factor */
88 PSDEV_DEBUG_PATH, /* crashdump log location */
89 PSDEV_DEBUG_DUMP_PATH, /* crashdump tracelog location */
90 PSDEV_CPT_TABLE, /* information about cpu partitions */
91 PSDEV_LNET_UPCALL, /* User mode upcall script */
92 PSDEV_LNET_MEMUSED, /* bytes currently PORTAL_ALLOCated */
93 PSDEV_LNET_CATASTROPHE, /* if we have LBUGged or panic'd */
94 PSDEV_LNET_PANIC_ON_LBUG, /* flag to panic on LBUG */
95 PSDEV_LNET_DUMP_KERNEL, /* snapshot kernel debug buffer to file */
96 PSDEV_LNET_DAEMON_FILE, /* spool kernel debug buffer to file */
97 PSDEV_LNET_DEBUG_MB, /* size of debug buffer */
98 PSDEV_LNET_DEBUG_LOG_UPCALL, /* debug log upcall script */
99 PSDEV_LNET_WATCHDOG_RATELIMIT, /* ratelimit watchdog messages */
100 PSDEV_LNET_FORCE_LBUG, /* hook to force an LBUG */
101 PSDEV_LNET_FAIL_LOC, /* control test failures instrumentation */
102 PSDEV_LNET_FAIL_VAL, /* userdata for fail loc */
106 proc_call_handler(void *data, int write,
107 loff_t *ppos, void *buffer, size_t *lenp,
108 int (*handler)(void *data, int write,
109 loff_t pos, void *buffer, int len))
111 int rc = handler(data, write, *ppos, buffer, *lenp);
124 EXPORT_SYMBOL(proc_call_handler);
126 static int __proc_dobitmasks(void *data, int write,
127 loff_t pos, void *buffer, int nob)
129 const int tmpstrlen = 512;
132 unsigned int *mask = data;
133 int is_subsys = (mask == &libcfs_subsystem_debug) ? 1 : 0;
134 int is_printk = (mask == &libcfs_printk) ? 1 : 0;
136 rc = cfs_trace_allocate_string_buffer(&tmpstr, tmpstrlen);
141 libcfs_debug_mask2str(tmpstr, tmpstrlen, *mask, is_subsys);
147 rc = cfs_trace_copyout_string(buffer, nob,
151 rc = cfs_trace_copyin_string(tmpstr, tmpstrlen, buffer, nob);
153 cfs_trace_free_string_buffer(tmpstr, tmpstrlen);
157 rc = libcfs_debug_str2mask(mask, tmpstr, is_subsys);
158 /* Always print LBUG/LASSERT to console, so keep this mask */
163 cfs_trace_free_string_buffer(tmpstr, tmpstrlen);
167 DECLARE_PROC_HANDLER(proc_dobitmasks)
169 static int min_watchdog_ratelimit = 0; /* disable ratelimiting */
170 static int max_watchdog_ratelimit = (24*60*60); /* limit to once per day */
172 static int __proc_dump_kernel(void *data, int write,
173 loff_t pos, void *buffer, int nob)
178 return cfs_trace_dump_debug_buffer_usrstr(buffer, nob);
181 DECLARE_PROC_HANDLER(proc_dump_kernel)
183 static int __proc_daemon_file(void *data, int write,
184 loff_t pos, void *buffer, int nob)
187 int len = strlen(cfs_tracefile);
192 return cfs_trace_copyout_string(buffer, nob,
193 cfs_tracefile + pos, "\n");
196 return cfs_trace_daemon_command_usrstr(buffer, nob);
199 DECLARE_PROC_HANDLER(proc_daemon_file)
201 static int __proc_debug_mb(void *data, int write,
202 loff_t pos, void *buffer, int nob)
206 int len = snprintf(tmpstr, sizeof(tmpstr), "%d",
207 cfs_trace_get_debug_mb());
212 return cfs_trace_copyout_string(buffer, nob, tmpstr + pos,
216 return cfs_trace_set_debug_mb_usrstr(buffer, nob);
219 DECLARE_PROC_HANDLER(proc_debug_mb)
221 int LL_PROC_PROTO(proc_console_max_delay_cs)
223 int rc, max_delay_cs;
224 ctl_table_t dummy = *table;
227 dummy.data = &max_delay_cs;
228 dummy.proc_handler = &proc_dointvec;
230 if (!write) { /* read */
231 max_delay_cs = cfs_duration_sec(libcfs_console_max_delay * 100);
232 rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
238 rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
241 if (max_delay_cs <= 0)
244 d = cfs_time_seconds(max_delay_cs) / 100;
245 if (d == 0 || d < libcfs_console_min_delay)
247 libcfs_console_max_delay = d;
252 int LL_PROC_PROTO(proc_console_min_delay_cs)
254 int rc, min_delay_cs;
255 ctl_table_t dummy = *table;
258 dummy.data = &min_delay_cs;
259 dummy.proc_handler = &proc_dointvec;
261 if (!write) { /* read */
262 min_delay_cs = cfs_duration_sec(libcfs_console_min_delay * 100);
263 rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
269 rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
272 if (min_delay_cs <= 0)
275 d = cfs_time_seconds(min_delay_cs) / 100;
276 if (d == 0 || d > libcfs_console_max_delay)
278 libcfs_console_min_delay = d;
283 int LL_PROC_PROTO(proc_console_backoff)
286 ctl_table_t dummy = *table;
288 dummy.data = &backoff;
289 dummy.proc_handler = &proc_dointvec;
291 if (!write) { /* read */
292 backoff= libcfs_console_backoff;
293 rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
299 rc = ll_proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
305 libcfs_console_backoff = backoff;
310 int LL_PROC_PROTO(libcfs_force_lbug)
317 int LL_PROC_PROTO(proc_fail_loc)
320 long old_fail_loc = cfs_fail_loc;
322 rc = ll_proc_dolongvec(table, write, filp, buffer, lenp, ppos);
323 if (old_fail_loc != cfs_fail_loc)
324 wake_up(&cfs_race_waitq);
328 static int __proc_cpt_table(void *data, int write,
329 loff_t pos, void *buffer, int nob)
338 LASSERT(cfs_cpt_table != NULL);
341 LIBCFS_ALLOC(buf, len);
345 rc = cfs_cpt_table_print(cfs_cpt_table, buf, len);
349 LIBCFS_FREE(buf, len);
362 rc = cfs_trace_copyout_string(buffer, nob, buf + pos, NULL);
365 LIBCFS_FREE(buf, len);
368 DECLARE_PROC_HANDLER(proc_cpt_table)
370 static ctl_table_t lnet_table[] = {
372 * NB No .strategy entries have been provided since sysctl(8) prefers
373 * to go via /proc for portability.
376 INIT_CTL_NAME(PSDEV_DEBUG)
378 .data = &libcfs_debug,
379 .maxlen = sizeof(int),
381 .proc_handler = &proc_dobitmasks,
384 INIT_CTL_NAME(PSDEV_SUBSYSTEM_DEBUG)
385 .procname = "subsystem_debug",
386 .data = &libcfs_subsystem_debug,
387 .maxlen = sizeof(int),
389 .proc_handler = &proc_dobitmasks,
392 INIT_CTL_NAME(PSDEV_PRINTK)
393 .procname = "printk",
394 .data = &libcfs_printk,
395 .maxlen = sizeof(int),
397 .proc_handler = &proc_dobitmasks,
400 INIT_CTL_NAME(PSDEV_CONSOLE_RATELIMIT)
401 .procname = "console_ratelimit",
402 .data = &libcfs_console_ratelimit,
403 .maxlen = sizeof(int),
405 .proc_handler = &proc_dointvec
408 INIT_CTL_NAME(PSDEV_CONSOLE_MAX_DELAY_CS)
409 .procname = "console_max_delay_centisecs",
410 .maxlen = sizeof(int),
412 .proc_handler = &proc_console_max_delay_cs
415 INIT_CTL_NAME(PSDEV_CONSOLE_MIN_DELAY_CS)
416 .procname = "console_min_delay_centisecs",
417 .maxlen = sizeof(int),
419 .proc_handler = &proc_console_min_delay_cs
422 INIT_CTL_NAME(PSDEV_CONSOLE_BACKOFF)
423 .procname = "console_backoff",
424 .maxlen = sizeof(int),
426 .proc_handler = &proc_console_backoff
430 INIT_CTL_NAME(PSDEV_DEBUG_PATH)
431 .procname = "debug_path",
432 .data = libcfs_debug_file_path_arr,
433 .maxlen = sizeof(libcfs_debug_file_path_arr),
435 .proc_handler = &proc_dostring,
439 INIT_CTL_NAME(PSDEV_CPT_TABLE)
440 .procname = "cpu_partition_table",
443 .proc_handler = &proc_cpt_table,
447 INIT_CTL_NAME(PSDEV_LNET_UPCALL)
448 .procname = "upcall",
450 .maxlen = sizeof(lnet_upcall),
452 .proc_handler = &proc_dostring,
455 INIT_CTL_NAME(PSDEV_LNET_DEBUG_LOG_UPCALL)
456 .procname = "debug_log_upcall",
457 .data = lnet_debug_log_upcall,
458 .maxlen = sizeof(lnet_debug_log_upcall),
460 .proc_handler = &proc_dostring,
463 INIT_CTL_NAME(PSDEV_LNET_MEMUSED)
464 .procname = "lnet_memused",
465 .data = (int *)&libcfs_kmemory.counter,
466 .maxlen = sizeof(int),
468 .proc_handler = &proc_dointvec,
469 INIT_STRATEGY(&sysctl_intvec)
472 INIT_CTL_NAME(PSDEV_LNET_CATASTROPHE)
473 .procname = "catastrophe",
474 .data = &libcfs_catastrophe,
475 .maxlen = sizeof(int),
477 .proc_handler = &proc_dointvec,
478 INIT_STRATEGY(&sysctl_intvec)
481 INIT_CTL_NAME(PSDEV_LNET_PANIC_ON_LBUG)
482 .procname = "panic_on_lbug",
483 .data = &libcfs_panic_on_lbug,
484 .maxlen = sizeof(int),
486 .proc_handler = &proc_dointvec,
487 INIT_STRATEGY(&sysctl_intvec)
490 INIT_CTL_NAME(PSDEV_LNET_DUMP_KERNEL)
491 .procname = "dump_kernel",
494 .proc_handler = &proc_dump_kernel,
497 INIT_CTL_NAME(PSDEV_LNET_DAEMON_FILE)
498 .procname = "daemon_file",
501 .proc_handler = &proc_daemon_file,
504 INIT_CTL_NAME(PSDEV_LNET_DEBUG_MB)
505 .procname = "debug_mb",
507 .proc_handler = &proc_debug_mb,
510 INIT_CTL_NAME(PSDEV_LNET_WATCHDOG_RATELIMIT)
511 .procname = "watchdog_ratelimit",
512 .data = &libcfs_watchdog_ratelimit,
513 .maxlen = sizeof(int),
515 .proc_handler = &proc_dointvec_minmax,
516 .extra1 = &min_watchdog_ratelimit,
517 .extra2 = &max_watchdog_ratelimit,
519 { INIT_CTL_NAME(PSDEV_LNET_FORCE_LBUG)
520 .procname = "force_lbug",
524 .proc_handler = &libcfs_force_lbug
527 INIT_CTL_NAME(PSDEV_LNET_FAIL_LOC)
528 .procname = "fail_loc",
529 .data = &cfs_fail_loc,
530 .maxlen = sizeof(cfs_fail_loc),
532 .proc_handler = &proc_fail_loc
535 INIT_CTL_NAME(PSDEV_LNET_FAIL_VAL)
536 .procname = "fail_val",
537 .data = &cfs_fail_val,
538 .maxlen = sizeof(int),
540 .proc_handler = &proc_dointvec
548 static ctl_table_t top_table[] = {
550 INIT_CTL_NAME(CTL_LNET)
563 int insert_proc(void)
566 if (lnet_table_header == NULL)
567 lnet_table_header = cfs_register_sysctl_table(top_table, 0);
572 void remove_proc(void)
575 if (lnet_table_header != NULL)
576 unregister_sysctl_table(lnet_table_header);
578 lnet_table_header = NULL;