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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 ([email protected])
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}