95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/*
|
|
* linux/fs/9p/error.c
|
|
*
|
|
* Error string handling
|
|
*
|
|
* Plan 9 uses error strings, Unix uses error numbers. These functions
|
|
* try to help manage that and provide for dynamically adding error
|
|
* mappings.
|
|
*
|
|
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
|
|
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to:
|
|
* Free Software Foundation
|
|
* 51 Franklin Street, Fifth Floor
|
|
* Boston, MA 02111-1301 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/jhash.h>
|
|
#include <linux/string.h>
|
|
|
|
#include "debug.h"
|
|
#include "error.h"
|
|
|
|
/**
|
|
* v9fs_error_init - preload
|
|
* @errstr: error string
|
|
*
|
|
*/
|
|
|
|
int v9fs_error_init(void)
|
|
{
|
|
struct errormap *c;
|
|
int bucket;
|
|
|
|
/* initialize hash table */
|
|
for (bucket = 0; bucket < ERRHASHSZ; bucket++)
|
|
INIT_HLIST_HEAD(&hash_errmap[bucket]);
|
|
|
|
/* load initial error map into hash table */
|
|
for (c = errmap; c->name != NULL; c++) {
|
|
bucket = jhash(c->name, strlen(c->name), 0) % ERRHASHSZ;
|
|
INIT_HLIST_NODE(&c->list);
|
|
hlist_add_head(&c->list, &hash_errmap[bucket]);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* errstr2errno - convert error string to error number
|
|
* @errstr: error string
|
|
*
|
|
*/
|
|
|
|
int v9fs_errstr2errno(char *errstr)
|
|
{
|
|
int errno = 0;
|
|
struct hlist_node *p = NULL;
|
|
struct errormap *c = NULL;
|
|
int bucket = jhash(errstr, strlen(errstr), 0) % ERRHASHSZ;
|
|
|
|
hlist_for_each_entry(c, p, &hash_errmap[bucket], list) {
|
|
if (!strcmp(c->name, errstr)) {
|
|
errno = c->val;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (errno == 0) {
|
|
/* TODO: if error isn't found, add it dynamically */
|
|
printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__,
|
|
errstr);
|
|
errno = 1;
|
|
}
|
|
|
|
return -errno;
|
|
}
|