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Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
Allan Stephens29ede242006-10-16 21:42:04 -07002 * net/tipc/dbg.c: TIPC print buffer routines for debugging
Per Lidenb97bf3f2006-01-02 19:04:38 +01003 *
Per Liden593a5f22006-01-11 19:14:19 +01004 * Copyright (c) 1996-2006, Ericsson AB
Allan Stephens29ede242006-10-16 21:42:04 -07005 * Copyright (c) 2005-2006, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
Per Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
Per Lidenb97bf3f2006-01-02 19:04:38 +010034 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
38#include "config.h"
39#include "dbg.h"
40
Allan Stephens29ede242006-10-16 21:42:04 -070041static char print_string[TIPC_PB_MAX_STR];
Ingo Molnar34af9462006-06-27 02:53:55 -070042static DEFINE_SPINLOCK(print_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +010043
Allan Stephens29ede242006-10-16 21:42:04 -070044static struct print_buf null_buf = { NULL, 0, NULL, NULL };
45struct print_buf *TIPC_NULL = &null_buf;
46
Per Lidenb97bf3f2006-01-02 19:04:38 +010047static struct print_buf cons_buf = { NULL, 0, NULL, NULL };
Per Liden4323add2006-01-18 00:38:21 +010048struct print_buf *TIPC_CONS = &cons_buf;
Per Lidenb97bf3f2006-01-02 19:04:38 +010049
50static struct print_buf log_buf = { NULL, 0, NULL, NULL };
Per Liden4323add2006-01-18 00:38:21 +010051struct print_buf *TIPC_LOG = &log_buf;
Per Lidenb97bf3f2006-01-02 19:04:38 +010052
53
54#define FORMAT(PTR,LEN,FMT) \
55{\
56 va_list args;\
57 va_start(args, FMT);\
58 LEN = vsprintf(PTR, FMT, args);\
59 va_end(args);\
60 *(PTR + LEN) = '\0';\
61}
62
63/*
64 * Locking policy when using print buffers.
65 *
Allan Stephens29ede242006-10-16 21:42:04 -070066 * The following routines use 'print_lock' for protection:
67 * 1) tipc_printf() - to protect its print buffer(s) and 'print_string'
68 * 2) TIPC_TEE() - to protect its print buffer(s)
69 * 3) tipc_dump() - to protect its print buffer(s) and 'print_string'
70 * 4) tipc_log_XXX() - to protect TIPC_LOG
71 *
72 * All routines of the form tipc_printbuf_XXX() rely on the caller to prevent
73 * simultaneous use of the print buffer(s) being manipulated.
Per Lidenb97bf3f2006-01-02 19:04:38 +010074 */
75
76/**
Per Liden4323add2006-01-18 00:38:21 +010077 * tipc_printbuf_init - initialize print buffer to empty
Allan Stephens29ede242006-10-16 21:42:04 -070078 * @pb: pointer to print buffer structure
79 * @raw: pointer to character array used by print buffer
80 * @size: size of character array
81 *
82 * Makes the print buffer a null device that discards anything written to it
83 * if the character array is too small (or absent).
Per Lidenb97bf3f2006-01-02 19:04:38 +010084 */
85
Allan Stephens29ede242006-10-16 21:42:04 -070086void tipc_printbuf_init(struct print_buf *pb, char *raw, u32 size)
Per Lidenb97bf3f2006-01-02 19:04:38 +010087{
Allan Stephens29ede242006-10-16 21:42:04 -070088 pb->buf = raw;
89 pb->crs = raw;
90 pb->size = size;
Sam Ravnborg1fc54d82006-03-20 22:36:47 -080091 pb->next = NULL;
Allan Stephens29ede242006-10-16 21:42:04 -070092
93 if (size < TIPC_PB_MIN_SIZE) {
94 pb->buf = NULL;
95 } else if (raw) {
96 pb->buf[0] = 0;
97 pb->buf[size-1] = ~0;
98 }
Per Lidenb97bf3f2006-01-02 19:04:38 +010099}
100
101/**
Per Liden4323add2006-01-18 00:38:21 +0100102 * tipc_printbuf_reset - reinitialize print buffer to empty state
Allan Stephens29ede242006-10-16 21:42:04 -0700103 * @pb: pointer to print buffer structure
Per Lidenb97bf3f2006-01-02 19:04:38 +0100104 */
105
Per Liden4323add2006-01-18 00:38:21 +0100106void tipc_printbuf_reset(struct print_buf *pb)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100107{
Allan Stephens29ede242006-10-16 21:42:04 -0700108 tipc_printbuf_init(pb, pb->buf, pb->size);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100109}
110
111/**
Per Liden4323add2006-01-18 00:38:21 +0100112 * tipc_printbuf_empty - test if print buffer is in empty state
Allan Stephens29ede242006-10-16 21:42:04 -0700113 * @pb: pointer to print buffer structure
114 *
115 * Returns non-zero if print buffer is empty.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100116 */
117
Per Liden4323add2006-01-18 00:38:21 +0100118int tipc_printbuf_empty(struct print_buf *pb)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100119{
Allan Stephens29ede242006-10-16 21:42:04 -0700120 return (!pb->buf || (pb->crs == pb->buf));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100121}
122
123/**
Per Liden4323add2006-01-18 00:38:21 +0100124 * tipc_printbuf_validate - check for print buffer overflow
Allan Stephens29ede242006-10-16 21:42:04 -0700125 * @pb: pointer to print buffer structure
Per Lidenb97bf3f2006-01-02 19:04:38 +0100126 *
127 * Verifies that a print buffer has captured all data written to it.
128 * If data has been lost, linearize buffer and prepend an error message
129 *
Allan Stephens29ede242006-10-16 21:42:04 -0700130 * Returns length of print buffer data string (including trailing NUL)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100131 */
132
Per Liden4323add2006-01-18 00:38:21 +0100133int tipc_printbuf_validate(struct print_buf *pb)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100134{
Allan Stephens29ede242006-10-16 21:42:04 -0700135 char *err = "\n\n*** PRINT BUFFER OVERFLOW ***\n\n";
Per Lidenb97bf3f2006-01-02 19:04:38 +0100136 char *cp_buf;
137 struct print_buf cb;
138
Allan Stephens29ede242006-10-16 21:42:04 -0700139 if (!pb->buf)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100140 return 0;
141
Allan Stephens29ede242006-10-16 21:42:04 -0700142 if (pb->buf[pb->size - 1] == 0) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100143 cp_buf = kmalloc(pb->size, GFP_ATOMIC);
144 if (cp_buf != NULL){
Per Liden4323add2006-01-18 00:38:21 +0100145 tipc_printbuf_init(&cb, cp_buf, pb->size);
146 tipc_printbuf_move(&cb, pb);
147 tipc_printbuf_move(pb, &cb);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100148 kfree(cp_buf);
149 memcpy(pb->buf, err, strlen(err));
150 } else {
Per Liden4323add2006-01-18 00:38:21 +0100151 tipc_printbuf_reset(pb);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100152 tipc_printf(pb, err);
153 }
154 }
155 return (pb->crs - pb->buf + 1);
156}
157
158/**
Per Liden4323add2006-01-18 00:38:21 +0100159 * tipc_printbuf_move - move print buffer contents to another print buffer
Allan Stephens29ede242006-10-16 21:42:04 -0700160 * @pb_to: pointer to destination print buffer structure
161 * @pb_from: pointer to source print buffer structure
Per Lidenb97bf3f2006-01-02 19:04:38 +0100162 *
163 * Current contents of destination print buffer (if any) are discarded.
164 * Source print buffer becomes empty if a successful move occurs.
165 */
166
Per Liden4323add2006-01-18 00:38:21 +0100167void tipc_printbuf_move(struct print_buf *pb_to, struct print_buf *pb_from)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100168{
169 int len;
170
171 /* Handle the cases where contents can't be moved */
172
Allan Stephens29ede242006-10-16 21:42:04 -0700173 if (!pb_to->buf)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100174 return;
175
Allan Stephens29ede242006-10-16 21:42:04 -0700176 if (!pb_from->buf) {
Per Liden4323add2006-01-18 00:38:21 +0100177 tipc_printbuf_reset(pb_to);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100178 return;
179 }
180
181 if (pb_to->size < pb_from->size) {
Per Liden4323add2006-01-18 00:38:21 +0100182 tipc_printbuf_reset(pb_to);
Allan Stephens29ede242006-10-16 21:42:04 -0700183 tipc_printf(pb_to, "*** PRINT BUFFER MOVE ERROR ***");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100184 return;
185 }
186
187 /* Copy data from char after cursor to end (if used) */
Allan Stephens29ede242006-10-16 21:42:04 -0700188
Per Lidenb97bf3f2006-01-02 19:04:38 +0100189 len = pb_from->buf + pb_from->size - pb_from->crs - 2;
190 if ((pb_from->buf[pb_from->size-1] == 0) && (len > 0)) {
191 strcpy(pb_to->buf, pb_from->crs + 1);
192 pb_to->crs = pb_to->buf + len;
193 } else
194 pb_to->crs = pb_to->buf;
195
196 /* Copy data from start to cursor (always) */
Allan Stephens29ede242006-10-16 21:42:04 -0700197
Per Lidenb97bf3f2006-01-02 19:04:38 +0100198 len = pb_from->crs - pb_from->buf;
199 strcpy(pb_to->crs, pb_from->buf);
200 pb_to->crs += len;
201
Per Liden4323add2006-01-18 00:38:21 +0100202 tipc_printbuf_reset(pb_from);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100203}
204
205/**
206 * tipc_printf - append formatted output to print buffer chain
Allan Stephens29ede242006-10-16 21:42:04 -0700207 * @pb: pointer to chain of print buffers (may be NULL)
208 * @fmt: formatted info to be printed
Per Lidenb97bf3f2006-01-02 19:04:38 +0100209 */
210
211void tipc_printf(struct print_buf *pb, const char *fmt, ...)
212{
213 int chars_to_add;
214 int chars_left;
215 char save_char;
216 struct print_buf *pb_next;
217
218 spin_lock_bh(&print_lock);
219 FORMAT(print_string, chars_to_add, fmt);
Allan Stephens29ede242006-10-16 21:42:04 -0700220 if (chars_to_add >= TIPC_PB_MAX_STR)
221 strcpy(print_string, "*** PRINT BUFFER STRING TOO LONG ***");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100222
223 while (pb) {
Per Liden4323add2006-01-18 00:38:21 +0100224 if (pb == TIPC_CONS)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100225 printk(print_string);
226 else if (pb->buf) {
227 chars_left = pb->buf + pb->size - pb->crs - 1;
228 if (chars_to_add <= chars_left) {
229 strcpy(pb->crs, print_string);
230 pb->crs += chars_to_add;
Allan Stephens29ede242006-10-16 21:42:04 -0700231 } else if (chars_to_add >= (pb->size - 1)) {
232 strcpy(pb->buf, print_string + chars_to_add + 1
233 - pb->size);
234 pb->crs = pb->buf + pb->size - 1;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100235 } else {
236 strcpy(pb->buf, print_string + chars_left);
237 save_char = print_string[chars_left];
238 print_string[chars_left] = 0;
239 strcpy(pb->crs, print_string);
240 print_string[chars_left] = save_char;
241 pb->crs = pb->buf + chars_to_add - chars_left;
242 }
243 }
244 pb_next = pb->next;
Sam Ravnborg1fc54d82006-03-20 22:36:47 -0800245 pb->next = NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100246 pb = pb_next;
247 }
248 spin_unlock_bh(&print_lock);
249}
250
251/**
Per Liden4323add2006-01-18 00:38:21 +0100252 * TIPC_TEE - perform next output operation on both print buffers
Allan Stephens29ede242006-10-16 21:42:04 -0700253 * @b0: pointer to chain of print buffers (may be NULL)
254 * @b1: pointer to print buffer to add to chain
255 *
256 * Returns pointer to print buffer chain.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100257 */
258
Per Liden4323add2006-01-18 00:38:21 +0100259struct print_buf *TIPC_TEE(struct print_buf *b0, struct print_buf *b1)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100260{
261 struct print_buf *pb = b0;
262
263 if (!b0 || (b0 == b1))
264 return b1;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100265
266 spin_lock_bh(&print_lock);
267 while (pb->next) {
268 if ((pb->next == b1) || (pb->next == b0))
269 pb->next = pb->next->next;
270 else
271 pb = pb->next;
272 }
273 pb->next = b1;
274 spin_unlock_bh(&print_lock);
275 return b0;
276}
277
278/**
279 * print_to_console - write string of bytes to console in multiple chunks
280 */
281
282static void print_to_console(char *crs, int len)
283{
284 int rest = len;
285
286 while (rest > 0) {
Allan Stephens29ede242006-10-16 21:42:04 -0700287 int sz = rest < TIPC_PB_MAX_STR ? rest : TIPC_PB_MAX_STR;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100288 char c = crs[sz];
289
290 crs[sz] = 0;
291 printk((const char *)crs);
292 crs[sz] = c;
293 rest -= sz;
294 crs += sz;
295 }
296}
297
298/**
299 * printbuf_dump - write print buffer contents to console
300 */
301
302static void printbuf_dump(struct print_buf *pb)
303{
304 int len;
305
Allan Stephens29ede242006-10-16 21:42:04 -0700306 if (!pb->buf) {
307 printk("*** PRINT BUFFER NOT ALLOCATED ***");
308 return;
309 }
310
Per Lidenb97bf3f2006-01-02 19:04:38 +0100311 /* Dump print buffer from char after cursor to end (if used) */
Allan Stephens29ede242006-10-16 21:42:04 -0700312
Per Lidenb97bf3f2006-01-02 19:04:38 +0100313 len = pb->buf + pb->size - pb->crs - 2;
314 if ((pb->buf[pb->size - 1] == 0) && (len > 0))
315 print_to_console(pb->crs + 1, len);
316
317 /* Dump print buffer from start to cursor (always) */
Allan Stephens29ede242006-10-16 21:42:04 -0700318
Per Lidenb97bf3f2006-01-02 19:04:38 +0100319 len = pb->crs - pb->buf;
320 print_to_console(pb->buf, len);
321}
322
323/**
324 * tipc_dump - dump non-console print buffer(s) to console
Allan Stephens29ede242006-10-16 21:42:04 -0700325 * @pb: pointer to chain of print buffers
Per Lidenb97bf3f2006-01-02 19:04:38 +0100326 */
327
328void tipc_dump(struct print_buf *pb, const char *fmt, ...)
329{
Allan Stephens29ede242006-10-16 21:42:04 -0700330 struct print_buf *pb_next;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100331 int len;
332
333 spin_lock_bh(&print_lock);
Allan Stephens29ede242006-10-16 21:42:04 -0700334 FORMAT(print_string, len, fmt);
335 printk(print_string);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100336
337 for (; pb; pb = pb->next) {
Allan Stephens29ede242006-10-16 21:42:04 -0700338 if (pb != TIPC_CONS) {
339 printk("\n---- Start of %s log dump ----\n\n",
340 (pb == TIPC_LOG) ? "global" : "local");
341 printbuf_dump(pb);
342 tipc_printbuf_reset(pb);
343 printk("\n---- End of dump ----\n");
344 }
345 pb_next = pb->next;
346 pb->next = NULL;
347 pb = pb_next;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100348 }
349 spin_unlock_bh(&print_lock);
350}
351
352/**
Per Liden4323add2006-01-18 00:38:21 +0100353 * tipc_log_stop - free up TIPC log print buffer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100354 */
355
Per Liden4323add2006-01-18 00:38:21 +0100356void tipc_log_stop(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100357{
358 spin_lock_bh(&print_lock);
Per Liden4323add2006-01-18 00:38:21 +0100359 if (TIPC_LOG->buf) {
360 kfree(TIPC_LOG->buf);
361 TIPC_LOG->buf = NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100362 }
363 spin_unlock_bh(&print_lock);
364}
365
366/**
Allan Stephens29ede242006-10-16 21:42:04 -0700367 * tipc_log_reinit - (re)initialize TIPC log print buffer
368 * @log_size: print buffer size to use
Per Lidenb97bf3f2006-01-02 19:04:38 +0100369 */
370
Per Liden4323add2006-01-18 00:38:21 +0100371void tipc_log_reinit(int log_size)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100372{
Per Liden4323add2006-01-18 00:38:21 +0100373 tipc_log_stop();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100374
375 if (log_size) {
Allan Stephens29ede242006-10-16 21:42:04 -0700376 if (log_size < TIPC_PB_MIN_SIZE)
377 log_size = TIPC_PB_MIN_SIZE;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100378 spin_lock_bh(&print_lock);
Allan Stephens29ede242006-10-16 21:42:04 -0700379 tipc_printbuf_init(TIPC_LOG, kmalloc(log_size, GFP_ATOMIC),
380 log_size);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100381 spin_unlock_bh(&print_lock);
382 }
383}
384
385/**
Per Liden4323add2006-01-18 00:38:21 +0100386 * tipc_log_resize - reconfigure size of TIPC log buffer
Per Lidenb97bf3f2006-01-02 19:04:38 +0100387 */
388
Per Liden4323add2006-01-18 00:38:21 +0100389struct sk_buff *tipc_log_resize(const void *req_tlv_area, int req_tlv_space)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100390{
391 u32 value;
392
393 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
Per Liden4323add2006-01-18 00:38:21 +0100394 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100395
Al Viro3e6c8cd2006-11-08 00:19:09 -0800396 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100397 if (value != delimit(value, 0, 32768))
Per Liden4323add2006-01-18 00:38:21 +0100398 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
399 " (log size must be 0-32768)");
400 tipc_log_reinit(value);
401 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100402}
403
404/**
Per Liden4323add2006-01-18 00:38:21 +0100405 * tipc_log_dump - capture TIPC log buffer contents in configuration message
Per Lidenb97bf3f2006-01-02 19:04:38 +0100406 */
407
Per Liden4323add2006-01-18 00:38:21 +0100408struct sk_buff *tipc_log_dump(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100409{
410 struct sk_buff *reply;
411
412 spin_lock_bh(&print_lock);
Per Liden4323add2006-01-18 00:38:21 +0100413 if (!TIPC_LOG->buf)
414 reply = tipc_cfg_reply_ultra_string("log not activated\n");
415 else if (tipc_printbuf_empty(TIPC_LOG))
416 reply = tipc_cfg_reply_ultra_string("log is empty\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100417 else {
418 struct tlv_desc *rep_tlv;
419 struct print_buf pb;
420 int str_len;
421
Per Liden4323add2006-01-18 00:38:21 +0100422 str_len = min(TIPC_LOG->size, 32768u);
423 reply = tipc_cfg_reply_alloc(TLV_SPACE(str_len));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100424 if (reply) {
425 rep_tlv = (struct tlv_desc *)reply->data;
Per Liden4323add2006-01-18 00:38:21 +0100426 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), str_len);
427 tipc_printbuf_move(&pb, TIPC_LOG);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100428 str_len = strlen(TLV_DATA(rep_tlv)) + 1;
429 skb_put(reply, TLV_SPACE(str_len));
430 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
431 }
432 }
433 spin_unlock_bh(&print_lock);
434 return reply;
435}
436