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 version 2
15 * as published by the Free Software Foundation.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to:
24 * Free Software Foundation
25 * 51 Franklin Street, Fifth Floor
26 * Boston, MA 02111-1301 USA
30 #include <linux/config.h>
31 #include <linux/module.h>
33 #include <linux/list.h>
34 #include <linux/jhash.h>
40 * v9fs_error_init - preload
41 * @errstr: error string
45 int v9fs_error_init(void)
50 /* initialize hash table */
51 for (bucket = 0; bucket < ERRHASHSZ; bucket++)
52 INIT_HLIST_HEAD(&hash_errmap[bucket]);
54 /* load initial error map into hash table */
55 for (c = errmap; c->name != NULL; c++) {
56 c->namelen = strlen(c->name);
57 bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ;
58 INIT_HLIST_NODE(&c->list);
59 hlist_add_head(&c->list, &hash_errmap[bucket]);
66 * errstr2errno - convert error string to error number
67 * @errstr: error string
71 int v9fs_errstr2errno(char *errstr, int len)
74 struct hlist_node *p = NULL;
75 struct errormap *c = NULL;
76 int bucket = jhash(errstr, len, 0) % ERRHASHSZ;
78 hlist_for_each_entry(c, p, &hash_errmap[bucket], list) {
79 if (c->namelen==len && !memcmp(c->name, errstr, len)) {
86 /* TODO: if error isn't found, add it dynamically */
87 printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__,