mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 05:32:00 +00:00
1471d85ffb
This LWN article explains the why scnprintf is preferred over snprintf in general https://lwn.net/Articles/69419/ Ie. snprintf() returns what *would* be the resulting length, while scnprintf() returns the actual length. Note that ctcm_print_statistics() writes the data into the kernel log and is therefore not suitable for sysfs_emit(). Observable behavior is not changed, as there may be dependencies. Reviewed-by: Alexandra Winter <wintera@linux.ibm.com> Signed-off-by: Thorsten Winkler <twinkler@linux.ibm.com> Signed-off-by: Alexandra Winter <wintera@linux.ibm.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright IBM Corp. 2001, 2007
|
|
* Authors: Peter Tiedemann (ptiedem@de.ibm.com)
|
|
*
|
|
*/
|
|
|
|
#include <linux/stddef.h>
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/debugfs.h>
|
|
#include "ctcm_dbug.h"
|
|
|
|
/*
|
|
* Debug Facility Stuff
|
|
*/
|
|
|
|
struct ctcm_dbf_info ctcm_dbf[CTCM_DBF_INFOS] = {
|
|
[CTCM_DBF_SETUP] = {"ctc_setup", 8, 1, 64, CTC_DBF_INFO, NULL},
|
|
[CTCM_DBF_ERROR] = {"ctc_error", 8, 1, 64, CTC_DBF_ERROR, NULL},
|
|
[CTCM_DBF_TRACE] = {"ctc_trace", 8, 1, 64, CTC_DBF_ERROR, NULL},
|
|
[CTCM_DBF_MPC_SETUP] = {"mpc_setup", 8, 1, 80, CTC_DBF_INFO, NULL},
|
|
[CTCM_DBF_MPC_ERROR] = {"mpc_error", 8, 1, 80, CTC_DBF_ERROR, NULL},
|
|
[CTCM_DBF_MPC_TRACE] = {"mpc_trace", 8, 1, 80, CTC_DBF_ERROR, NULL},
|
|
};
|
|
|
|
void ctcm_unregister_dbf_views(void)
|
|
{
|
|
int x;
|
|
for (x = 0; x < CTCM_DBF_INFOS; x++) {
|
|
debug_unregister(ctcm_dbf[x].id);
|
|
ctcm_dbf[x].id = NULL;
|
|
}
|
|
}
|
|
|
|
int ctcm_register_dbf_views(void)
|
|
{
|
|
int x;
|
|
for (x = 0; x < CTCM_DBF_INFOS; x++) {
|
|
/* register the areas */
|
|
ctcm_dbf[x].id = debug_register(ctcm_dbf[x].name,
|
|
ctcm_dbf[x].pages,
|
|
ctcm_dbf[x].areas,
|
|
ctcm_dbf[x].len);
|
|
if (ctcm_dbf[x].id == NULL) {
|
|
ctcm_unregister_dbf_views();
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* register a view */
|
|
debug_register_view(ctcm_dbf[x].id, &debug_hex_ascii_view);
|
|
/* set a passing level */
|
|
debug_set_level(ctcm_dbf[x].id, ctcm_dbf[x].level);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ctcm_dbf_longtext(enum ctcm_dbf_names dbf_nix, int level, char *fmt, ...)
|
|
{
|
|
char dbf_txt_buf[64];
|
|
va_list args;
|
|
|
|
if (!debug_level_enabled(ctcm_dbf[dbf_nix].id, level))
|
|
return;
|
|
va_start(args, fmt);
|
|
vscnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
|
|
va_end(args);
|
|
|
|
debug_text_event(ctcm_dbf[dbf_nix].id, level, dbf_txt_buf);
|
|
}
|
|
|