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 UAEACCES:			return -EACCES;
73	case UAEBUSY:			return -EBUSY;
74	case UAEEXIST:			return -EEXIST;
75	case UAENOTDIR:			return -ENOTDIR;
76	case UAEISDIR:			return -EISDIR;
77	case UAEFBIG:			return -EFBIG;
78	case UAENOSPC:			return -ENOSPC;
79	case UAEROFS:			return -EROFS;
80	case UAEMLINK:			return -EMLINK;
81	case UAEDEADLK:			return -EDEADLK;
82	case UAENAMETOOLONG:		return -ENAMETOOLONG;
83	case UAENOLCK:			return -ENOLCK;
84	case UAENOTEMPTY:		return -ENOTEMPTY;
85	case UAELOOP:			return -ELOOP;
86	case UAEOVERFLOW:		return -EOVERFLOW;
87	case UAENOMEDIUM:		return -ENOMEDIUM;
88	case UAEDQUOT:			return -EDQUOT;
89
90		/* RXKAD abort codes; from include/rxrpc/packet.h.  ET "RXK" == 0x1260B00 */
91	case RXKADINCONSISTENCY: return -EPROTO;
92	case RXKADPACKETSHORT:	return -EPROTO;
93	case RXKADLEVELFAIL:	return -EKEYREJECTED;
94	case RXKADTICKETLEN:	return -EKEYREJECTED;
95	case RXKADOUTOFSEQUENCE: return -EPROTO;
96	case RXKADNOAUTH:	return -EKEYREJECTED;
97	case RXKADBADKEY:	return -EKEYREJECTED;
98	case RXKADBADTICKET:	return -EKEYREJECTED;
99	case RXKADUNKNOWNKEY:	return -EKEYREJECTED;
100	case RXKADEXPIRED:	return -EKEYEXPIRED;
101	case RXKADSEALEDINCON:	return -EKEYREJECTED;
102	case RXKADDATALEN:	return -EKEYREJECTED;
103	case RXKADILLEGALLEVEL:	return -EKEYREJECTED;
104
105	case RXGEN_OPCODE:	return -ENOTSUPP;
106
107	default:		return -EREMOTEIO;
108	}
109}
110
111/*
112 * Select the error to report from a set of errors.
113 */
114void afs_prioritise_error(struct afs_error *e, int error, u32 abort_code)
115{
116	switch (error) {
117	case 0:
118		return;
119	default:
120		if (e->error == -ETIMEDOUT ||
121		    e->error == -ETIME)
122			return;
123		fallthrough;
124	case -ETIMEDOUT:
125	case -ETIME:
126		if (e->error == -ENOMEM ||
127		    e->error == -ENONET)
128			return;
129		fallthrough;
130	case -ENOMEM:
131	case -ENONET:
132		if (e->error == -ERFKILL)
133			return;
134		fallthrough;
135	case -ERFKILL:
136		if (e->error == -EADDRNOTAVAIL)
137			return;
138		fallthrough;
139	case -EADDRNOTAVAIL:
140		if (e->error == -ENETUNREACH)
141			return;
142		fallthrough;
143	case -ENETUNREACH:
144		if (e->error == -EHOSTUNREACH)
145			return;
146		fallthrough;
147	case -EHOSTUNREACH:
148		if (e->error == -EHOSTDOWN)
149			return;
150		fallthrough;
151	case -EHOSTDOWN:
152		if (e->error == -ECONNREFUSED)
153			return;
154		fallthrough;
155	case -ECONNREFUSED:
156		if (e->error == -ECONNRESET)
157			return;
158		fallthrough;
159	case -ECONNRESET: /* Responded, but call expired. */
160		if (e->responded)
161			return;
162		e->error = error;
163		return;
164
165	case -ECONNABORTED:
166		e->responded = true;
167		e->error = afs_abort_to_error(abort_code);
168		return;
169	}
170}
171