misc.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/* miscellaneous bits
  3 *
  4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
  5 * Written by David Howells (dhowells@redhat.com)
  6 */
  7
  8#include <linux/kernel.h>
  9#include <linux/module.h>
 10#include <linux/errno.h>
 11#include <crypto/krb5.h>
 12#include "internal.h"
 13#include "afs_fs.h"
 14#include "protocol_uae.h"
 15
 16/*
 17 * convert an AFS abort code to a Linux error number
 18 */
 19int afs_abort_to_error(u32 abort_code)
 20{
 21	switch (abort_code) {
 22		/* Low errno codes inserted into abort namespace */
 23	case 13:		return -EACCES;
 24	case 27:		return -EFBIG;
 25	case 30:		return -EROFS;
 26
 27		/* VICE "special error" codes; 101 - 111 */
 28	case VSALVAGE:		return -EIO;
 29	case VNOVNODE:		return -ENOENT;
 30	case VNOVOL:		return -ENOMEDIUM;
 31	case VVOLEXISTS:	return -EEXIST;
 32	case VNOSERVICE:	return -EIO;
 33	case VOFFLINE:		return -ENOENT;
 34	case VONLINE:		return -EEXIST;
 35	case VDISKFULL:		return -ENOSPC;
 36	case VOVERQUOTA:	return -EDQUOT;
 37	case VBUSY:		return -EBUSY;
 38	case VMOVED:		return -ENXIO;
 39
 40		/* Volume Location server errors */
 41	case AFSVL_IDEXIST:		return -EEXIST;
 42	case AFSVL_IO:			return -EREMOTEIO;
 43	case AFSVL_NAMEEXIST:		return -EEXIST;
 44	case AFSVL_CREATEFAIL:		return -EREMOTEIO;
 45	case AFSVL_NOENT:		return -ENOMEDIUM;
 46	case AFSVL_EMPTY:		return -ENOMEDIUM;
 47	case AFSVL_ENTDELETED:		return -ENOMEDIUM;
 48	case AFSVL_BADNAME:		return -EINVAL;
 49	case AFSVL_BADINDEX:		return -EINVAL;
 50	case AFSVL_BADVOLTYPE:		return -EINVAL;
 51	case AFSVL_BADSERVER:		return -EINVAL;
 52	case AFSVL_BADPARTITION:	return -EINVAL;
 53	case AFSVL_REPSFULL:		return -EFBIG;
 54	case AFSVL_NOREPSERVER:		return -ENOENT;
 55	case AFSVL_DUPREPSERVER:	return -EEXIST;
 56	case AFSVL_RWNOTFOUND:		return -ENOENT;
 57	case AFSVL_BADREFCOUNT:		return -EINVAL;
 58	case AFSVL_SIZEEXCEEDED:	return -EINVAL;
 59	case AFSVL_BADENTRY:		return -EINVAL;
 60	case AFSVL_BADVOLIDBUMP:	return -EINVAL;
 61	case AFSVL_IDALREADYHASHED:	return -EINVAL;
 62	case AFSVL_ENTRYLOCKED:		return -EBUSY;
 63	case AFSVL_BADVOLOPER:		return -EBADRQC;
 64	case AFSVL_BADRELLOCKTYPE:	return -EINVAL;
 65	case AFSVL_RERELEASE:		return -EREMOTEIO;
 66	case AFSVL_BADSERVERFLAG:	return -EINVAL;
 67	case AFSVL_PERM:		return -EACCES;
 68	case AFSVL_NOMEM:		return -EREMOTEIO;
 69
 70		/* Unified AFS error table */
 71	case UAEPERM:			return -EPERM;
 72	case UAENOENT:			return -ENOENT;
 73	case UAEAGAIN:			return -EAGAIN;
 74	case UAEACCES:			return -EACCES;
 75	case UAEBUSY:			return -EBUSY;
 76	case UAEEXIST:			return -EEXIST;
 77	case UAENOTDIR:			return -ENOTDIR;
 78	case UAEISDIR:			return -EISDIR;
 79	case UAEFBIG:			return -EFBIG;
 80	case UAENOSPC:			return -ENOSPC;
 81	case UAEROFS:			return -EROFS;
 82	case UAEMLINK:			return -EMLINK;
 83	case UAEDEADLK:			return -EDEADLK;
 84	case UAENAMETOOLONG:		return -ENAMETOOLONG;
 85	case UAENOLCK:			return -ENOLCK;
 86	case UAENOTEMPTY:		return -ENOTEMPTY;
 87	case UAELOOP:			return -ELOOP;
 88	case UAEOVERFLOW:		return -EOVERFLOW;
 89	case UAENOMEDIUM:		return -ENOMEDIUM;
 90	case UAEDQUOT:			return -EDQUOT;
 91
 92		/* RXKAD abort codes; from include/rxrpc/packet.h.  ET "RXK" == 0x1260B00 */
 93	case RXKADINCONSISTENCY: return -EPROTO;
 94	case RXKADPACKETSHORT:	return -EPROTO;
 95	case RXKADLEVELFAIL:	return -EKEYREJECTED;
 96	case RXKADTICKETLEN:	return -EKEYREJECTED;
 97	case RXKADOUTOFSEQUENCE: return -EPROTO;
 98	case RXKADNOAUTH:	return -EKEYREJECTED;
 99	case RXKADBADKEY:	return -EKEYREJECTED;
100	case RXKADBADTICKET:	return -EKEYREJECTED;
101	case RXKADUNKNOWNKEY:	return -EKEYREJECTED;
102	case RXKADEXPIRED:	return -EKEYEXPIRED;
103	case RXKADSEALEDINCON:	return -EKEYREJECTED;
104	case RXKADDATALEN:	return -EKEYREJECTED;
105	case RXKADILLEGALLEVEL:	return -EKEYREJECTED;
106
107	case RXGK_INCONSISTENCY:	return -EPROTO;
108	case RXGK_PACKETSHORT:		return -EPROTO;
109	case RXGK_BADCHALLENGE:		return -EPROTO;
110	case RXGK_SEALEDINCON:		return -EKEYREJECTED;
111	case RXGK_NOTAUTH:		return -EKEYREJECTED;
112	case RXGK_EXPIRED:		return -EKEYEXPIRED;
113	case RXGK_BADLEVEL:		return -EKEYREJECTED;
114	case RXGK_BADKEYNO:		return -EKEYREJECTED;
115	case RXGK_NOTRXGK:		return -EKEYREJECTED;
116	case RXGK_UNSUPPORTED:		return -EKEYREJECTED;
117	case RXGK_GSSERROR:		return -EKEYREJECTED;
118#ifdef RXGK_BADETYPE
119	case RXGK_BADETYPE:		return -ENOPKG;
120#endif
121#ifdef RXGK_BADTOKEN
122	case RXGK_BADTOKEN:		return -EKEYREJECTED;
123#endif
124#ifdef RXGK_BADETYPE
125	case RXGK_DATALEN:		return -EPROTO;
126#endif
127#ifdef RXGK_BADQOP
128	case RXGK_BADQOP:		return -EKEYREJECTED;
129#endif
130
131	case KRB5_PROG_KEYTYPE_NOSUPP:	return -ENOPKG;
132
133	case RXGEN_OPCODE:	return -ENOTSUPP;
134	case RX_INVALID_OPERATION:	return -ENOTSUPP;
135
136	default:		return -EREMOTEIO;
137	}
138}
139
140/*
141 * Select the error to report from a set of errors.
142 */
143void afs_prioritise_error(struct afs_error *e, int error, u32 abort_code)
144{
145	switch (error) {
146	case 0:
147		e->aborted = false;
148		e->error = 0;
149		return;
150	default:
151		if (e->error == -ETIMEDOUT ||
152		    e->error == -ETIME)
153			return;
154		fallthrough;
155	case -ETIMEDOUT:
156	case -ETIME:
157		if (e->error == -ENOMEM ||
158		    e->error == -ENONET)
159			return;
160		fallthrough;
161	case -ENOMEM:
162	case -ENONET:
163		if (e->error == -ERFKILL)
164			return;
165		fallthrough;
166	case -ERFKILL:
167		if (e->error == -EADDRNOTAVAIL)
168			return;
169		fallthrough;
170	case -EADDRNOTAVAIL:
171		if (e->error == -ENETUNREACH)
172			return;
173		fallthrough;
174	case -ENETUNREACH:
175		if (e->error == -EHOSTUNREACH)
176			return;
177		fallthrough;
178	case -EHOSTUNREACH:
179		if (e->error == -EHOSTDOWN)
180			return;
181		fallthrough;
182	case -EHOSTDOWN:
183		if (e->error == -ECONNREFUSED)
184			return;
185		fallthrough;
186	case -ECONNREFUSED:
187		if (e->error == -ECONNRESET)
188			return;
189		fallthrough;
190	case -ECONNRESET: /* Responded, but call expired. */
191		if (e->responded)
192			return;
193		e->error = error;
194		e->aborted = false;
195		return;
196
197	case -ECONNABORTED:
198		e->error = afs_abort_to_error(abort_code);
199		e->aborted = true;
200		e->responded = true;
201		return;
202	case -ENETRESET: /* Responded, but we seem to have changed address */
203		e->aborted = false;
204		e->responded = true;
205		e->error = error;
206		return;
207	}
208}