From 3ed8491c8a75cefe95b57f7f428a3e2ddd421e97 Mon Sep 17 00:00:00 2001 From: Eric Van Hensbergen Date: Fri, 9 Sep 2005 13:04:24 -0700 Subject: [PATCH] v9fs: debug and support routines This part of the patch contains debug and other misc routines. Signed-off-by: Eric Van Hensbergen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/9p/error.c | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) create mode 100644 fs/9p/error.c (limited to 'fs/9p/error.c') diff --git a/fs/9p/error.c b/fs/9p/error.c new file mode 100644 index 00000000000..fee5d19179c --- /dev/null +++ b/fs/9p/error.c @@ -0,0 +1,93 @@ +/* + * 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 + * Copyright (C) 2002 by Ron Minnich + * + * 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 +#include + +#include +#include + +#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; +} -- cgit v1.2.3