248 lines
7.4 KiB
C
248 lines
7.4 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 version 2
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* 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/module.h>
|
|
#include <linux/list.h>
|
|
#include <linux/jhash.h>
|
|
#include <linux/errno.h>
|
|
#include <net/9p/9p.h>
|
|
|
|
/**
|
|
* struct errormap - map string errors from Plan 9 to Linux numeric ids
|
|
* @name: string sent over 9P
|
|
* @val: numeric id most closely representing @name
|
|
* @namelen: length of string
|
|
* @list: hash-table list for string lookup
|
|
*/
|
|
struct errormap {
|
|
char *name;
|
|
int val;
|
|
|
|
int namelen;
|
|
struct hlist_node list;
|
|
};
|
|
|
|
#define ERRHASHSZ 32
|
|
static struct hlist_head hash_errmap[ERRHASHSZ];
|
|
|
|
/* FixMe - reduce to a reasonable size */
|
|
static struct errormap errmap[] = {
|
|
{"Operation not permitted", EPERM},
|
|
{"wstat prohibited", EPERM},
|
|
{"No such file or directory", ENOENT},
|
|
{"directory entry not found", ENOENT},
|
|
{"file not found", ENOENT},
|
|
{"Interrupted system call", EINTR},
|
|
{"Input/output error", EIO},
|
|
{"No such device or address", ENXIO},
|
|
{"Argument list too long", E2BIG},
|
|
{"Bad file descriptor", EBADF},
|
|
{"Resource temporarily unavailable", EAGAIN},
|
|
{"Cannot allocate memory", ENOMEM},
|
|
{"Permission denied", EACCES},
|
|
{"Bad address", EFAULT},
|
|
{"Block device required", ENOTBLK},
|
|
{"Device or resource busy", EBUSY},
|
|
{"File exists", EEXIST},
|
|
{"Invalid cross-device link", EXDEV},
|
|
{"No such device", ENODEV},
|
|
{"Not a directory", ENOTDIR},
|
|
{"Is a directory", EISDIR},
|
|
{"Invalid argument", EINVAL},
|
|
{"Too many open files in system", ENFILE},
|
|
{"Too many open files", EMFILE},
|
|
{"Text file busy", ETXTBSY},
|
|
{"File too large", EFBIG},
|
|
{"No space left on device", ENOSPC},
|
|
{"Illegal seek", ESPIPE},
|
|
{"Read-only file system", EROFS},
|
|
{"Too many links", EMLINK},
|
|
{"Broken pipe", EPIPE},
|
|
{"Numerical argument out of domain", EDOM},
|
|
{"Numerical result out of range", ERANGE},
|
|
{"Resource deadlock avoided", EDEADLK},
|
|
{"File name too long", ENAMETOOLONG},
|
|
{"No locks available", ENOLCK},
|
|
{"Function not implemented", ENOSYS},
|
|
{"Directory not empty", ENOTEMPTY},
|
|
{"Too many levels of symbolic links", ELOOP},
|
|
{"No message of desired type", ENOMSG},
|
|
{"Identifier removed", EIDRM},
|
|
{"No data available", ENODATA},
|
|
{"Machine is not on the network", ENONET},
|
|
{"Package not installed", ENOPKG},
|
|
{"Object is remote", EREMOTE},
|
|
{"Link has been severed", ENOLINK},
|
|
{"Communication error on send", ECOMM},
|
|
{"Protocol error", EPROTO},
|
|
{"Bad message", EBADMSG},
|
|
{"File descriptor in bad state", EBADFD},
|
|
{"Streams pipe error", ESTRPIPE},
|
|
{"Too many users", EUSERS},
|
|
{"Socket operation on non-socket", ENOTSOCK},
|
|
{"Message too long", EMSGSIZE},
|
|
{"Protocol not available", ENOPROTOOPT},
|
|
{"Protocol not supported", EPROTONOSUPPORT},
|
|
{"Socket type not supported", ESOCKTNOSUPPORT},
|
|
{"Operation not supported", EOPNOTSUPP},
|
|
{"Protocol family not supported", EPFNOSUPPORT},
|
|
{"Network is down", ENETDOWN},
|
|
{"Network is unreachable", ENETUNREACH},
|
|
{"Network dropped connection on reset", ENETRESET},
|
|
{"Software caused connection abort", ECONNABORTED},
|
|
{"Connection reset by peer", ECONNRESET},
|
|
{"No buffer space available", ENOBUFS},
|
|
{"Transport endpoint is already connected", EISCONN},
|
|
{"Transport endpoint is not connected", ENOTCONN},
|
|
{"Cannot send after transport endpoint shutdown", ESHUTDOWN},
|
|
{"Connection timed out", ETIMEDOUT},
|
|
{"Connection refused", ECONNREFUSED},
|
|
{"Host is down", EHOSTDOWN},
|
|
{"No route to host", EHOSTUNREACH},
|
|
{"Operation already in progress", EALREADY},
|
|
{"Operation now in progress", EINPROGRESS},
|
|
{"Is a named type file", EISNAM},
|
|
{"Remote I/O error", EREMOTEIO},
|
|
{"Disk quota exceeded", EDQUOT},
|
|
/* errors from fossil, vacfs, and u9fs */
|
|
{"fid unknown or out of range", EBADF},
|
|
{"permission denied", EACCES},
|
|
{"file does not exist", ENOENT},
|
|
{"authentication failed", ECONNREFUSED},
|
|
{"bad offset in directory read", ESPIPE},
|
|
{"bad use of fid", EBADF},
|
|
{"wstat can't convert between files and directories", EPERM},
|
|
{"directory is not empty", ENOTEMPTY},
|
|
{"file exists", EEXIST},
|
|
{"file already exists", EEXIST},
|
|
{"file or directory already exists", EEXIST},
|
|
{"fid already in use", EBADF},
|
|
{"file in use", ETXTBSY},
|
|
{"i/o error", EIO},
|
|
{"file already open for I/O", ETXTBSY},
|
|
{"illegal mode", EINVAL},
|
|
{"illegal name", ENAMETOOLONG},
|
|
{"not a directory", ENOTDIR},
|
|
{"not a member of proposed group", EPERM},
|
|
{"not owner", EACCES},
|
|
{"only owner can change group in wstat", EACCES},
|
|
{"read only file system", EROFS},
|
|
{"no access to special file", EPERM},
|
|
{"i/o count too large", EIO},
|
|
{"unknown group", EINVAL},
|
|
{"unknown user", EINVAL},
|
|
{"bogus wstat buffer", EPROTO},
|
|
{"exclusive use file already open", EAGAIN},
|
|
{"corrupted directory entry", EIO},
|
|
{"corrupted file entry", EIO},
|
|
{"corrupted block label", EIO},
|
|
{"corrupted meta data", EIO},
|
|
{"illegal offset", EINVAL},
|
|
{"illegal path element", ENOENT},
|
|
{"root of file system is corrupted", EIO},
|
|
{"corrupted super block", EIO},
|
|
{"protocol botch", EPROTO},
|
|
{"file system is full", ENOSPC},
|
|
{"file is in use", EAGAIN},
|
|
{"directory entry is not allocated", ENOENT},
|
|
{"file is read only", EROFS},
|
|
{"file has been removed", EIDRM},
|
|
{"only support truncation to zero length", EPERM},
|
|
{"cannot remove root", EPERM},
|
|
{"file too big", EFBIG},
|
|
{"venti i/o error", EIO},
|
|
/* these are not errors */
|
|
{"u9fs rhostsauth: no authentication required", 0},
|
|
{"u9fs authnone: no authentication required", 0},
|
|
{NULL, -1}
|
|
};
|
|
|
|
/**
|
|
* p9_error_init - preload mappings into hash list
|
|
*
|
|
*/
|
|
|
|
int p9_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++) {
|
|
c->namelen = strlen(c->name);
|
|
bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ;
|
|
INIT_HLIST_NODE(&c->list);
|
|
hlist_add_head(&c->list, &hash_errmap[bucket]);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
EXPORT_SYMBOL(p9_error_init);
|
|
|
|
/**
|
|
* errstr2errno - convert error string to error number
|
|
* @errstr: error string
|
|
* @len: length of error string
|
|
*
|
|
*/
|
|
|
|
int p9_errstr2errno(char *errstr, int len)
|
|
{
|
|
int errno;
|
|
struct hlist_node *p;
|
|
struct errormap *c;
|
|
int bucket;
|
|
|
|
errno = 0;
|
|
p = NULL;
|
|
c = NULL;
|
|
bucket = jhash(errstr, len, 0) % ERRHASHSZ;
|
|
hlist_for_each_entry(c, p, &hash_errmap[bucket], list) {
|
|
if (c->namelen == len && !memcmp(c->name, errstr, len)) {
|
|
errno = c->val;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (errno == 0) {
|
|
/* TODO: if error isn't found, add it dynamically */
|
|
errstr[len] = 0;
|
|
printk(KERN_ERR "%s: server reported unknown error %s\n",
|
|
__func__, errstr);
|
|
errno = ESERVERFAULT;
|
|
}
|
|
|
|
return -errno;
|
|
}
|
|
EXPORT_SYMBOL(p9_errstr2errno);
|