4 * Error string handling
6 * Plan 9 uses error strings, Unix uses error numbers. These functions
7 * try to help manage that and provide for dynamically adding error
10 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
11 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to:
25 * Free Software Foundation
26 * 51 Franklin Street, Fifth Floor
27 * Boston, MA 02111-1301 USA
31 #include <linux/config.h>
32 #include <linux/module.h>
34 #include <linux/list.h>
35 #include <linux/jhash.h>
36 #include <linux/string.h>
42 * v9fs_error_init - preload
43 * @errstr: error string
47 int v9fs_error_init(void)
52 /* initialize hash table */
53 for (bucket = 0; bucket < ERRHASHSZ; bucket++)
54 INIT_HLIST_HEAD(&hash_errmap[bucket]);
56 /* load initial error map into hash table */
57 for (c = errmap; c->name != NULL; c++) {
58 bucket = jhash(c->name, strlen(c->name), 0) % ERRHASHSZ;
59 INIT_HLIST_NODE(&c->list);
60 hlist_add_head(&c->list, &hash_errmap[bucket]);
67 * errstr2errno - convert error string to error number
68 * @errstr: error string
72 int v9fs_errstr2errno(char *errstr)
75 struct hlist_node *p = NULL;
76 struct errormap *c = NULL;
77 int bucket = jhash(errstr, strlen(errstr), 0) % ERRHASHSZ;
79 hlist_for_each_entry(c, p, &hash_errmap[bucket], list) {
80 if (!strcmp(c->name, errstr)) {
87 /* TODO: if error isn't found, add it dynamically */
88 printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__,