xref: /openbmc/linux/fs/afs/misc.c (revision 8f762fe5)
1  /* miscellaneous bits
2   *
3   * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
4   * Written by David Howells (dhowells@redhat.com)
5   *
6   * This program is free software; you can redistribute it and/or
7   * modify it under the terms of the GNU General Public License
8   * as published by the Free Software Foundation; either version
9   * 2 of the License, or (at your option) any later version.
10   */
11  
12  #include <linux/kernel.h>
13  #include <linux/module.h>
14  #include <linux/errno.h>
15  #include "internal.h"
16  #include "afs_fs.h"
17  
18  /*
19   * convert an AFS abort code to a Linux error number
20   */
21  int afs_abort_to_error(u32 abort_code)
22  {
23  	switch (abort_code) {
24  		/* Low errno codes inserted into abort namespace */
25  	case 13:		return -EACCES;
26  	case 27:		return -EFBIG;
27  	case 30:		return -EROFS;
28  
29  		/* VICE "special error" codes; 101 - 111 */
30  	case VSALVAGE:		return -EIO;
31  	case VNOVNODE:		return -ENOENT;
32  	case VNOVOL:		return -ENOMEDIUM;
33  	case VVOLEXISTS:	return -EEXIST;
34  	case VNOSERVICE:	return -EIO;
35  	case VOFFLINE:		return -ENOENT;
36  	case VONLINE:		return -EEXIST;
37  	case VDISKFULL:		return -ENOSPC;
38  	case VOVERQUOTA:	return -EDQUOT;
39  	case VBUSY:		return -EBUSY;
40  	case VMOVED:		return -ENXIO;
41  
42  		/* Volume Location server errors */
43  	case AFSVL_IDEXIST:		return -EEXIST;
44  	case AFSVL_IO:			return -EREMOTEIO;
45  	case AFSVL_NAMEEXIST:		return -EEXIST;
46  	case AFSVL_CREATEFAIL:		return -EREMOTEIO;
47  	case AFSVL_NOENT:		return -ENOMEDIUM;
48  	case AFSVL_EMPTY:		return -ENOMEDIUM;
49  	case AFSVL_ENTDELETED:		return -ENOMEDIUM;
50  	case AFSVL_BADNAME:		return -EINVAL;
51  	case AFSVL_BADINDEX:		return -EINVAL;
52  	case AFSVL_BADVOLTYPE:		return -EINVAL;
53  	case AFSVL_BADSERVER:		return -EINVAL;
54  	case AFSVL_BADPARTITION:	return -EINVAL;
55  	case AFSVL_REPSFULL:		return -EFBIG;
56  	case AFSVL_NOREPSERVER:		return -ENOENT;
57  	case AFSVL_DUPREPSERVER:	return -EEXIST;
58  	case AFSVL_RWNOTFOUND:		return -ENOENT;
59  	case AFSVL_BADREFCOUNT:		return -EINVAL;
60  	case AFSVL_SIZEEXCEEDED:	return -EINVAL;
61  	case AFSVL_BADENTRY:		return -EINVAL;
62  	case AFSVL_BADVOLIDBUMP:	return -EINVAL;
63  	case AFSVL_IDALREADYHASHED:	return -EINVAL;
64  	case AFSVL_ENTRYLOCKED:		return -EBUSY;
65  	case AFSVL_BADVOLOPER:		return -EBADRQC;
66  	case AFSVL_BADRELLOCKTYPE:	return -EINVAL;
67  	case AFSVL_RERELEASE:		return -EREMOTEIO;
68  	case AFSVL_BADSERVERFLAG:	return -EINVAL;
69  	case AFSVL_PERM:		return -EACCES;
70  	case AFSVL_NOMEM:		return -EREMOTEIO;
71  
72  		/* Unified AFS error table; ET "uae" == 0x2f6df00 */
73  	case 0x2f6df00:		return -EPERM;
74  	case 0x2f6df01:		return -ENOENT;
75  	case 0x2f6df04:		return -EIO;
76  	case 0x2f6df0a:		return -EAGAIN;
77  	case 0x2f6df0b:		return -ENOMEM;
78  	case 0x2f6df0c:		return -EACCES;
79  	case 0x2f6df0f:		return -EBUSY;
80  	case 0x2f6df10:		return -EEXIST;
81  	case 0x2f6df11:		return -EXDEV;
82  	case 0x2f6df12:		return -ENODEV;
83  	case 0x2f6df13:		return -ENOTDIR;
84  	case 0x2f6df14:		return -EISDIR;
85  	case 0x2f6df15:		return -EINVAL;
86  	case 0x2f6df1a:		return -EFBIG;
87  	case 0x2f6df1b:		return -ENOSPC;
88  	case 0x2f6df1d:		return -EROFS;
89  	case 0x2f6df1e:		return -EMLINK;
90  	case 0x2f6df20:		return -EDOM;
91  	case 0x2f6df21:		return -ERANGE;
92  	case 0x2f6df22:		return -EDEADLK;
93  	case 0x2f6df23:		return -ENAMETOOLONG;
94  	case 0x2f6df24:		return -ENOLCK;
95  	case 0x2f6df26:		return -ENOTEMPTY;
96  	case 0x2f6df28:		return -EWOULDBLOCK;
97  	case 0x2f6df69:		return -ENOTCONN;
98  	case 0x2f6df6c:		return -ETIMEDOUT;
99  	case 0x2f6df78:		return -EDQUOT;
100  
101  		/* RXKAD abort codes; from include/rxrpc/packet.h.  ET "RXK" == 0x1260B00 */
102  	case RXKADINCONSISTENCY: return -EPROTO;
103  	case RXKADPACKETSHORT:	return -EPROTO;
104  	case RXKADLEVELFAIL:	return -EKEYREJECTED;
105  	case RXKADTICKETLEN:	return -EKEYREJECTED;
106  	case RXKADOUTOFSEQUENCE: return -EPROTO;
107  	case RXKADNOAUTH:	return -EKEYREJECTED;
108  	case RXKADBADKEY:	return -EKEYREJECTED;
109  	case RXKADBADTICKET:	return -EKEYREJECTED;
110  	case RXKADUNKNOWNKEY:	return -EKEYREJECTED;
111  	case RXKADEXPIRED:	return -EKEYEXPIRED;
112  	case RXKADSEALEDINCON:	return -EKEYREJECTED;
113  	case RXKADDATALEN:	return -EKEYREJECTED;
114  	case RXKADILLEGALLEVEL:	return -EKEYREJECTED;
115  
116  	case RXGEN_OPCODE:	return -ENOTSUPP;
117  
118  	default:		return -EREMOTEIO;
119  	}
120  }
121  
122  /*
123   * Select the error to report from a set of errors.
124   */
125  void afs_prioritise_error(struct afs_error *e, int error, u32 abort_code)
126  {
127  	switch (error) {
128  	case 0:
129  		return;
130  	default:
131  		if (e->error == -ETIMEDOUT ||
132  		    e->error == -ETIME)
133  			return;
134  		/* Fall through */
135  	case -ETIMEDOUT:
136  	case -ETIME:
137  		if (e->error == -ENOMEM ||
138  		    e->error == -ENONET)
139  			return;
140  		/* Fall through */
141  	case -ENOMEM:
142  	case -ENONET:
143  		if (e->error == -ERFKILL)
144  			return;
145  		/* Fall through */
146  	case -ERFKILL:
147  		if (e->error == -EADDRNOTAVAIL)
148  			return;
149  		/* Fall through */
150  	case -EADDRNOTAVAIL:
151  		if (e->error == -ENETUNREACH)
152  			return;
153  		/* Fall through */
154  	case -ENETUNREACH:
155  		if (e->error == -EHOSTUNREACH)
156  			return;
157  		/* Fall through */
158  	case -EHOSTUNREACH:
159  		if (e->error == -EHOSTDOWN)
160  			return;
161  		/* Fall through */
162  	case -EHOSTDOWN:
163  		if (e->error == -ECONNREFUSED)
164  			return;
165  		/* Fall through */
166  	case -ECONNREFUSED:
167  		if (e->error == -ECONNRESET)
168  			return;
169  		/* Fall through */
170  	case -ECONNRESET: /* Responded, but call expired. */
171  		if (e->responded)
172  			return;
173  		e->error = error;
174  		return;
175  
176  	case -ECONNABORTED:
177  		e->responded = true;
178  		e->error = afs_abort_to_error(abort_code);
179  		return;
180  	}
181  }
182