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  */
afs_abort_to_error(u32 abort_code)18 int 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  */
afs_prioritise_error(struct afs_error * e,int error,u32 abort_code)115 void 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