1 /* AFS Volume Location Service client 2 * 3 * Copyright (C) 2002 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/gfp.h> 13 #include <linux/init.h> 14 #include <linux/sched.h> 15 #include "internal.h" 16 17 /* 18 * map volume locator abort codes to error codes 19 */ 20 static int afs_vl_abort_to_error(u32 abort_code) 21 { 22 _enter("%u", abort_code); 23 24 switch (abort_code) { 25 case AFSVL_IDEXIST: return -EEXIST; 26 case AFSVL_IO: return -EREMOTEIO; 27 case AFSVL_NAMEEXIST: return -EEXIST; 28 case AFSVL_CREATEFAIL: return -EREMOTEIO; 29 case AFSVL_NOENT: return -ENOMEDIUM; 30 case AFSVL_EMPTY: return -ENOMEDIUM; 31 case AFSVL_ENTDELETED: return -ENOMEDIUM; 32 case AFSVL_BADNAME: return -EINVAL; 33 case AFSVL_BADINDEX: return -EINVAL; 34 case AFSVL_BADVOLTYPE: return -EINVAL; 35 case AFSVL_BADSERVER: return -EINVAL; 36 case AFSVL_BADPARTITION: return -EINVAL; 37 case AFSVL_REPSFULL: return -EFBIG; 38 case AFSVL_NOREPSERVER: return -ENOENT; 39 case AFSVL_DUPREPSERVER: return -EEXIST; 40 case AFSVL_RWNOTFOUND: return -ENOENT; 41 case AFSVL_BADREFCOUNT: return -EINVAL; 42 case AFSVL_SIZEEXCEEDED: return -EINVAL; 43 case AFSVL_BADENTRY: return -EINVAL; 44 case AFSVL_BADVOLIDBUMP: return -EINVAL; 45 case AFSVL_IDALREADYHASHED: return -EINVAL; 46 case AFSVL_ENTRYLOCKED: return -EBUSY; 47 case AFSVL_BADVOLOPER: return -EBADRQC; 48 case AFSVL_BADRELLOCKTYPE: return -EINVAL; 49 case AFSVL_RERELEASE: return -EREMOTEIO; 50 case AFSVL_BADSERVERFLAG: return -EINVAL; 51 case AFSVL_PERM: return -EACCES; 52 case AFSVL_NOMEM: return -EREMOTEIO; 53 default: 54 return afs_abort_to_error(abort_code); 55 } 56 } 57 58 /* 59 * deliver reply data to a VL.GetEntryByXXX call 60 */ 61 static int afs_deliver_vl_get_entry_by_xxx(struct afs_call *call) 62 { 63 struct afs_cache_vlocation *entry; 64 __be32 *bp; 65 u32 tmp; 66 int loop, ret; 67 68 _enter(""); 69 70 ret = afs_transfer_reply(call); 71 if (ret < 0) 72 return ret; 73 74 /* unmarshall the reply once we've received all of it */ 75 entry = call->reply; 76 bp = call->buffer; 77 78 for (loop = 0; loop < 64; loop++) 79 entry->name[loop] = ntohl(*bp++); 80 entry->name[loop] = 0; 81 bp++; /* final NUL */ 82 83 bp++; /* type */ 84 entry->nservers = ntohl(*bp++); 85 86 for (loop = 0; loop < 8; loop++) 87 entry->servers[loop].s_addr = *bp++; 88 89 bp += 8; /* partition IDs */ 90 91 for (loop = 0; loop < 8; loop++) { 92 tmp = ntohl(*bp++); 93 entry->srvtmask[loop] = 0; 94 if (tmp & AFS_VLSF_RWVOL) 95 entry->srvtmask[loop] |= AFS_VOL_VTM_RW; 96 if (tmp & AFS_VLSF_ROVOL) 97 entry->srvtmask[loop] |= AFS_VOL_VTM_RO; 98 if (tmp & AFS_VLSF_BACKVOL) 99 entry->srvtmask[loop] |= AFS_VOL_VTM_BAK; 100 } 101 102 entry->vid[0] = ntohl(*bp++); 103 entry->vid[1] = ntohl(*bp++); 104 entry->vid[2] = ntohl(*bp++); 105 106 bp++; /* clone ID */ 107 108 tmp = ntohl(*bp++); /* flags */ 109 entry->vidmask = 0; 110 if (tmp & AFS_VLF_RWEXISTS) 111 entry->vidmask |= AFS_VOL_VTM_RW; 112 if (tmp & AFS_VLF_ROEXISTS) 113 entry->vidmask |= AFS_VOL_VTM_RO; 114 if (tmp & AFS_VLF_BACKEXISTS) 115 entry->vidmask |= AFS_VOL_VTM_BAK; 116 if (!entry->vidmask) 117 return -EBADMSG; 118 119 _leave(" = 0 [done]"); 120 return 0; 121 } 122 123 /* 124 * VL.GetEntryByName operation type 125 */ 126 static const struct afs_call_type afs_RXVLGetEntryByName = { 127 .name = "VL.GetEntryByName", 128 .deliver = afs_deliver_vl_get_entry_by_xxx, 129 .abort_to_error = afs_vl_abort_to_error, 130 .destructor = afs_flat_call_destructor, 131 }; 132 133 /* 134 * VL.GetEntryById operation type 135 */ 136 static const struct afs_call_type afs_RXVLGetEntryById = { 137 .name = "VL.GetEntryById", 138 .deliver = afs_deliver_vl_get_entry_by_xxx, 139 .abort_to_error = afs_vl_abort_to_error, 140 .destructor = afs_flat_call_destructor, 141 }; 142 143 /* 144 * dispatch a get volume entry by name operation 145 */ 146 int afs_vl_get_entry_by_name(struct in_addr *addr, 147 struct key *key, 148 const char *volname, 149 struct afs_cache_vlocation *entry, 150 bool async) 151 { 152 struct afs_call *call; 153 size_t volnamesz, reqsz, padsz; 154 __be32 *bp; 155 156 _enter(""); 157 158 volnamesz = strlen(volname); 159 padsz = (4 - (volnamesz & 3)) & 3; 160 reqsz = 8 + volnamesz + padsz; 161 162 call = afs_alloc_flat_call(&afs_RXVLGetEntryByName, reqsz, 384); 163 if (!call) 164 return -ENOMEM; 165 166 call->key = key; 167 call->reply = entry; 168 call->service_id = VL_SERVICE; 169 call->port = htons(AFS_VL_PORT); 170 171 /* marshall the parameters */ 172 bp = call->request; 173 *bp++ = htonl(VLGETENTRYBYNAME); 174 *bp++ = htonl(volnamesz); 175 memcpy(bp, volname, volnamesz); 176 if (padsz > 0) 177 memset((void *) bp + volnamesz, 0, padsz); 178 179 /* initiate the call */ 180 return afs_make_call(addr, call, GFP_KERNEL, async); 181 } 182 183 /* 184 * dispatch a get volume entry by ID operation 185 */ 186 int afs_vl_get_entry_by_id(struct in_addr *addr, 187 struct key *key, 188 afs_volid_t volid, 189 afs_voltype_t voltype, 190 struct afs_cache_vlocation *entry, 191 bool async) 192 { 193 struct afs_call *call; 194 __be32 *bp; 195 196 _enter(""); 197 198 call = afs_alloc_flat_call(&afs_RXVLGetEntryById, 12, 384); 199 if (!call) 200 return -ENOMEM; 201 202 call->key = key; 203 call->reply = entry; 204 call->service_id = VL_SERVICE; 205 call->port = htons(AFS_VL_PORT); 206 207 /* marshall the parameters */ 208 bp = call->request; 209 *bp++ = htonl(VLGETENTRYBYID); 210 *bp++ = htonl(volid); 211 *bp = htonl(voltype); 212 213 /* initiate the call */ 214 return afs_make_call(addr, call, GFP_KERNEL, async); 215 } 216