4323add677
This patch adds a tipc_ prefix to all externally visible symbols. Signed-off-by: Per Liden <per.liden@ericsson.com>
396 lines
10 KiB
C
396 lines
10 KiB
C
/*
|
|
* net/tipc/dbg.c: TIPC print buffer routines for debuggign
|
|
*
|
|
* Copyright (c) 1996-2006, Ericsson AB
|
|
* Copyright (c) 2005, Wind River Systems
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the names of the copyright holders nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "core.h"
|
|
#include "config.h"
|
|
#include "dbg.h"
|
|
|
|
#define MAX_STRING 512
|
|
|
|
static char print_string[MAX_STRING];
|
|
static spinlock_t print_lock = SPIN_LOCK_UNLOCKED;
|
|
|
|
static struct print_buf cons_buf = { NULL, 0, NULL, NULL };
|
|
struct print_buf *TIPC_CONS = &cons_buf;
|
|
|
|
static struct print_buf log_buf = { NULL, 0, NULL, NULL };
|
|
struct print_buf *TIPC_LOG = &log_buf;
|
|
|
|
|
|
#define FORMAT(PTR,LEN,FMT) \
|
|
{\
|
|
va_list args;\
|
|
va_start(args, FMT);\
|
|
LEN = vsprintf(PTR, FMT, args);\
|
|
va_end(args);\
|
|
*(PTR + LEN) = '\0';\
|
|
}
|
|
|
|
/*
|
|
* Locking policy when using print buffers.
|
|
*
|
|
* 1) Routines of the form printbuf_XXX() rely on the caller to prevent
|
|
* simultaneous use of the print buffer(s) being manipulated.
|
|
* 2) tipc_printf() uses 'print_lock' to prevent simultaneous use of
|
|
* 'print_string' and to protect its print buffer(s).
|
|
* 3) TIPC_TEE() uses 'print_lock' to protect its print buffer(s).
|
|
* 4) Routines of the form log_XXX() uses 'print_lock' to protect TIPC_LOG.
|
|
*/
|
|
|
|
/**
|
|
* tipc_printbuf_init - initialize print buffer to empty
|
|
*/
|
|
|
|
void tipc_printbuf_init(struct print_buf *pb, char *raw, u32 sz)
|
|
{
|
|
if (!pb || !raw || (sz < (MAX_STRING + 1)))
|
|
return;
|
|
|
|
pb->crs = pb->buf = raw;
|
|
pb->size = sz;
|
|
pb->next = 0;
|
|
pb->buf[0] = 0;
|
|
pb->buf[sz-1] = ~0;
|
|
}
|
|
|
|
/**
|
|
* tipc_printbuf_reset - reinitialize print buffer to empty state
|
|
*/
|
|
|
|
void tipc_printbuf_reset(struct print_buf *pb)
|
|
{
|
|
if (pb && pb->buf)
|
|
tipc_printbuf_init(pb, pb->buf, pb->size);
|
|
}
|
|
|
|
/**
|
|
* tipc_printbuf_empty - test if print buffer is in empty state
|
|
*/
|
|
|
|
int tipc_printbuf_empty(struct print_buf *pb)
|
|
{
|
|
return (!pb || !pb->buf || (pb->crs == pb->buf));
|
|
}
|
|
|
|
/**
|
|
* tipc_printbuf_validate - check for print buffer overflow
|
|
*
|
|
* Verifies that a print buffer has captured all data written to it.
|
|
* If data has been lost, linearize buffer and prepend an error message
|
|
*
|
|
* Returns length of print buffer data string (including trailing NULL)
|
|
*/
|
|
|
|
int tipc_printbuf_validate(struct print_buf *pb)
|
|
{
|
|
char *err = " *** PRINT BUFFER WRAPPED AROUND ***\n";
|
|
char *cp_buf;
|
|
struct print_buf cb;
|
|
|
|
if (!pb || !pb->buf)
|
|
return 0;
|
|
|
|
if (pb->buf[pb->size - 1] == '\0') {
|
|
cp_buf = kmalloc(pb->size, GFP_ATOMIC);
|
|
if (cp_buf != NULL){
|
|
tipc_printbuf_init(&cb, cp_buf, pb->size);
|
|
tipc_printbuf_move(&cb, pb);
|
|
tipc_printbuf_move(pb, &cb);
|
|
kfree(cp_buf);
|
|
memcpy(pb->buf, err, strlen(err));
|
|
} else {
|
|
tipc_printbuf_reset(pb);
|
|
tipc_printf(pb, err);
|
|
}
|
|
}
|
|
return (pb->crs - pb->buf + 1);
|
|
}
|
|
|
|
/**
|
|
* tipc_printbuf_move - move print buffer contents to another print buffer
|
|
*
|
|
* Current contents of destination print buffer (if any) are discarded.
|
|
* Source print buffer becomes empty if a successful move occurs.
|
|
*/
|
|
|
|
void tipc_printbuf_move(struct print_buf *pb_to, struct print_buf *pb_from)
|
|
{
|
|
int len;
|
|
|
|
/* Handle the cases where contents can't be moved */
|
|
|
|
if (!pb_to || !pb_to->buf)
|
|
return;
|
|
|
|
if (!pb_from || !pb_from->buf) {
|
|
tipc_printbuf_reset(pb_to);
|
|
return;
|
|
}
|
|
|
|
if (pb_to->size < pb_from->size) {
|
|
tipc_printbuf_reset(pb_to);
|
|
tipc_printf(pb_to, "*** PRINT BUFFER OVERFLOW ***");
|
|
return;
|
|
}
|
|
|
|
/* Copy data from char after cursor to end (if used) */
|
|
len = pb_from->buf + pb_from->size - pb_from->crs - 2;
|
|
if ((pb_from->buf[pb_from->size-1] == 0) && (len > 0)) {
|
|
strcpy(pb_to->buf, pb_from->crs + 1);
|
|
pb_to->crs = pb_to->buf + len;
|
|
} else
|
|
pb_to->crs = pb_to->buf;
|
|
|
|
/* Copy data from start to cursor (always) */
|
|
len = pb_from->crs - pb_from->buf;
|
|
strcpy(pb_to->crs, pb_from->buf);
|
|
pb_to->crs += len;
|
|
|
|
tipc_printbuf_reset(pb_from);
|
|
}
|
|
|
|
/**
|
|
* tipc_printf - append formatted output to print buffer chain
|
|
*/
|
|
|
|
void tipc_printf(struct print_buf *pb, const char *fmt, ...)
|
|
{
|
|
int chars_to_add;
|
|
int chars_left;
|
|
char save_char;
|
|
struct print_buf *pb_next;
|
|
|
|
spin_lock_bh(&print_lock);
|
|
FORMAT(print_string, chars_to_add, fmt);
|
|
if (chars_to_add >= MAX_STRING)
|
|
strcpy(print_string, "*** STRING TOO LONG ***");
|
|
|
|
while (pb) {
|
|
if (pb == TIPC_CONS)
|
|
printk(print_string);
|
|
else if (pb->buf) {
|
|
chars_left = pb->buf + pb->size - pb->crs - 1;
|
|
if (chars_to_add <= chars_left) {
|
|
strcpy(pb->crs, print_string);
|
|
pb->crs += chars_to_add;
|
|
} else {
|
|
strcpy(pb->buf, print_string + chars_left);
|
|
save_char = print_string[chars_left];
|
|
print_string[chars_left] = 0;
|
|
strcpy(pb->crs, print_string);
|
|
print_string[chars_left] = save_char;
|
|
pb->crs = pb->buf + chars_to_add - chars_left;
|
|
}
|
|
}
|
|
pb_next = pb->next;
|
|
pb->next = 0;
|
|
pb = pb_next;
|
|
}
|
|
spin_unlock_bh(&print_lock);
|
|
}
|
|
|
|
/**
|
|
* TIPC_TEE - perform next output operation on both print buffers
|
|
*/
|
|
|
|
struct print_buf *TIPC_TEE(struct print_buf *b0, struct print_buf *b1)
|
|
{
|
|
struct print_buf *pb = b0;
|
|
|
|
if (!b0 || (b0 == b1))
|
|
return b1;
|
|
if (!b1)
|
|
return b0;
|
|
|
|
spin_lock_bh(&print_lock);
|
|
while (pb->next) {
|
|
if ((pb->next == b1) || (pb->next == b0))
|
|
pb->next = pb->next->next;
|
|
else
|
|
pb = pb->next;
|
|
}
|
|
pb->next = b1;
|
|
spin_unlock_bh(&print_lock);
|
|
return b0;
|
|
}
|
|
|
|
/**
|
|
* print_to_console - write string of bytes to console in multiple chunks
|
|
*/
|
|
|
|
static void print_to_console(char *crs, int len)
|
|
{
|
|
int rest = len;
|
|
|
|
while (rest > 0) {
|
|
int sz = rest < MAX_STRING ? rest : MAX_STRING;
|
|
char c = crs[sz];
|
|
|
|
crs[sz] = 0;
|
|
printk((const char *)crs);
|
|
crs[sz] = c;
|
|
rest -= sz;
|
|
crs += sz;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* printbuf_dump - write print buffer contents to console
|
|
*/
|
|
|
|
static void printbuf_dump(struct print_buf *pb)
|
|
{
|
|
int len;
|
|
|
|
/* Dump print buffer from char after cursor to end (if used) */
|
|
len = pb->buf + pb->size - pb->crs - 2;
|
|
if ((pb->buf[pb->size - 1] == 0) && (len > 0))
|
|
print_to_console(pb->crs + 1, len);
|
|
|
|
/* Dump print buffer from start to cursor (always) */
|
|
len = pb->crs - pb->buf;
|
|
print_to_console(pb->buf, len);
|
|
}
|
|
|
|
/**
|
|
* tipc_dump - dump non-console print buffer(s) to console
|
|
*/
|
|
|
|
void tipc_dump(struct print_buf *pb, const char *fmt, ...)
|
|
{
|
|
int len;
|
|
|
|
spin_lock_bh(&print_lock);
|
|
FORMAT(TIPC_CONS->buf, len, fmt);
|
|
printk(TIPC_CONS->buf);
|
|
|
|
for (; pb; pb = pb->next) {
|
|
if (pb == TIPC_CONS)
|
|
continue;
|
|
printk("\n---- Start of dump,%s log ----\n\n",
|
|
(pb == TIPC_LOG) ? "global" : "local");
|
|
printbuf_dump(pb);
|
|
tipc_printbuf_reset(pb);
|
|
printk("\n-------- End of dump --------\n");
|
|
}
|
|
spin_unlock_bh(&print_lock);
|
|
}
|
|
|
|
/**
|
|
* tipc_log_stop - free up TIPC log print buffer
|
|
*/
|
|
|
|
void tipc_log_stop(void)
|
|
{
|
|
spin_lock_bh(&print_lock);
|
|
if (TIPC_LOG->buf) {
|
|
kfree(TIPC_LOG->buf);
|
|
TIPC_LOG->buf = NULL;
|
|
}
|
|
spin_unlock_bh(&print_lock);
|
|
}
|
|
|
|
/**
|
|
* tipc_log_reinit - set TIPC log print buffer to specified size
|
|
*/
|
|
|
|
void tipc_log_reinit(int log_size)
|
|
{
|
|
tipc_log_stop();
|
|
|
|
if (log_size) {
|
|
if (log_size <= MAX_STRING)
|
|
log_size = MAX_STRING + 1;
|
|
spin_lock_bh(&print_lock);
|
|
tipc_printbuf_init(TIPC_LOG, kmalloc(log_size, GFP_ATOMIC), log_size);
|
|
spin_unlock_bh(&print_lock);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* tipc_log_resize - reconfigure size of TIPC log buffer
|
|
*/
|
|
|
|
struct sk_buff *tipc_log_resize(const void *req_tlv_area, int req_tlv_space)
|
|
{
|
|
u32 value;
|
|
|
|
if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
|
|
return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
|
|
|
|
value = *(u32 *)TLV_DATA(req_tlv_area);
|
|
value = ntohl(value);
|
|
if (value != delimit(value, 0, 32768))
|
|
return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
|
|
" (log size must be 0-32768)");
|
|
tipc_log_reinit(value);
|
|
return tipc_cfg_reply_none();
|
|
}
|
|
|
|
/**
|
|
* tipc_log_dump - capture TIPC log buffer contents in configuration message
|
|
*/
|
|
|
|
struct sk_buff *tipc_log_dump(void)
|
|
{
|
|
struct sk_buff *reply;
|
|
|
|
spin_lock_bh(&print_lock);
|
|
if (!TIPC_LOG->buf)
|
|
reply = tipc_cfg_reply_ultra_string("log not activated\n");
|
|
else if (tipc_printbuf_empty(TIPC_LOG))
|
|
reply = tipc_cfg_reply_ultra_string("log is empty\n");
|
|
else {
|
|
struct tlv_desc *rep_tlv;
|
|
struct print_buf pb;
|
|
int str_len;
|
|
|
|
str_len = min(TIPC_LOG->size, 32768u);
|
|
reply = tipc_cfg_reply_alloc(TLV_SPACE(str_len));
|
|
if (reply) {
|
|
rep_tlv = (struct tlv_desc *)reply->data;
|
|
tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), str_len);
|
|
tipc_printbuf_move(&pb, TIPC_LOG);
|
|
str_len = strlen(TLV_DATA(rep_tlv)) + 1;
|
|
skb_put(reply, TLV_SPACE(str_len));
|
|
TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
|
|
}
|
|
}
|
|
spin_unlock_bh(&print_lock);
|
|
return reply;
|
|
}
|
|
|