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Linux/fs/afs/misc.c

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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 (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  */
 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 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  */
114 void 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 

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