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