David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 1 | /* AFS Volume Location Service client |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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/init.h> |
| 13 | #include <linux/sched.h> |
| 14 | #include <rxrpc/rxrpc.h> |
| 15 | #include <rxrpc/transport.h> |
| 16 | #include <rxrpc/connection.h> |
| 17 | #include <rxrpc/call.h> |
| 18 | #include "server.h" |
| 19 | #include "volume.h" |
| 20 | #include "vlclient.h" |
| 21 | #include "kafsasyncd.h" |
| 22 | #include "kafstimod.h" |
| 23 | #include "errors.h" |
| 24 | #include "internal.h" |
| 25 | |
| 26 | #define VLGETENTRYBYID 503 /* AFS Get Cache Entry By ID operation ID */ |
| 27 | #define VLGETENTRYBYNAME 504 /* AFS Get Cache Entry By Name operation ID */ |
| 28 | #define VLPROBE 514 /* AFS Probe Volume Location Service operation ID */ |
| 29 | |
| 30 | static void afs_rxvl_get_entry_by_id_attn(struct rxrpc_call *call); |
| 31 | static void afs_rxvl_get_entry_by_id_error(struct rxrpc_call *call); |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | /* |
| 34 | * map afs VL abort codes to/from Linux error codes |
| 35 | * - called with call->lock held |
| 36 | */ |
| 37 | static void afs_rxvl_aemap(struct rxrpc_call *call) |
| 38 | { |
| 39 | int err; |
| 40 | |
| 41 | _enter("{%u,%u,%d}", |
| 42 | call->app_err_state, call->app_abort_code, call->app_errno); |
| 43 | |
| 44 | switch (call->app_err_state) { |
| 45 | case RXRPC_ESTATE_LOCAL_ABORT: |
| 46 | call->app_abort_code = -call->app_errno; |
| 47 | return; |
| 48 | |
| 49 | case RXRPC_ESTATE_PEER_ABORT: |
| 50 | switch (call->app_abort_code) { |
| 51 | case AFSVL_IDEXIST: err = -EEXIST; break; |
| 52 | case AFSVL_IO: err = -EREMOTEIO; break; |
| 53 | case AFSVL_NAMEEXIST: err = -EEXIST; break; |
| 54 | case AFSVL_CREATEFAIL: err = -EREMOTEIO; break; |
| 55 | case AFSVL_NOENT: err = -ENOMEDIUM; break; |
| 56 | case AFSVL_EMPTY: err = -ENOMEDIUM; break; |
| 57 | case AFSVL_ENTDELETED: err = -ENOMEDIUM; break; |
| 58 | case AFSVL_BADNAME: err = -EINVAL; break; |
| 59 | case AFSVL_BADINDEX: err = -EINVAL; break; |
| 60 | case AFSVL_BADVOLTYPE: err = -EINVAL; break; |
| 61 | case AFSVL_BADSERVER: err = -EINVAL; break; |
| 62 | case AFSVL_BADPARTITION: err = -EINVAL; break; |
| 63 | case AFSVL_REPSFULL: err = -EFBIG; break; |
| 64 | case AFSVL_NOREPSERVER: err = -ENOENT; break; |
| 65 | case AFSVL_DUPREPSERVER: err = -EEXIST; break; |
| 66 | case AFSVL_RWNOTFOUND: err = -ENOENT; break; |
| 67 | case AFSVL_BADREFCOUNT: err = -EINVAL; break; |
| 68 | case AFSVL_SIZEEXCEEDED: err = -EINVAL; break; |
| 69 | case AFSVL_BADENTRY: err = -EINVAL; break; |
| 70 | case AFSVL_BADVOLIDBUMP: err = -EINVAL; break; |
| 71 | case AFSVL_IDALREADYHASHED: err = -EINVAL; break; |
| 72 | case AFSVL_ENTRYLOCKED: err = -EBUSY; break; |
| 73 | case AFSVL_BADVOLOPER: err = -EBADRQC; break; |
| 74 | case AFSVL_BADRELLOCKTYPE: err = -EINVAL; break; |
| 75 | case AFSVL_RERELEASE: err = -EREMOTEIO; break; |
| 76 | case AFSVL_BADSERVERFLAG: err = -EINVAL; break; |
| 77 | case AFSVL_PERM: err = -EACCES; break; |
| 78 | case AFSVL_NOMEM: err = -EREMOTEIO; break; |
| 79 | default: |
| 80 | err = afs_abort_to_error(call->app_abort_code); |
| 81 | break; |
| 82 | } |
| 83 | call->app_errno = err; |
| 84 | return; |
| 85 | |
| 86 | default: |
| 87 | return; |
| 88 | } |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 89 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | #if 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | /* |
| 93 | * probe a volume location server to see if it is still alive -- unused |
| 94 | */ |
| 95 | static int afs_rxvl_probe(struct afs_server *server, int alloc_flags) |
| 96 | { |
| 97 | struct rxrpc_connection *conn; |
| 98 | struct rxrpc_call *call; |
| 99 | struct kvec piov[1]; |
| 100 | size_t sent; |
| 101 | int ret; |
| 102 | __be32 param[1]; |
| 103 | |
| 104 | DECLARE_WAITQUEUE(myself, current); |
| 105 | |
| 106 | /* get hold of the vlserver connection */ |
| 107 | ret = afs_server_get_vlconn(server, &conn); |
| 108 | if (ret < 0) |
| 109 | goto out; |
| 110 | |
| 111 | /* create a call through that connection */ |
| 112 | ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call); |
| 113 | if (ret < 0) { |
| 114 | printk("kAFS: Unable to create call: %d\n", ret); |
| 115 | goto out_put_conn; |
| 116 | } |
| 117 | call->app_opcode = VLPROBE; |
| 118 | |
| 119 | /* we want to get event notifications from the call */ |
| 120 | add_wait_queue(&call->waitq, &myself); |
| 121 | |
| 122 | /* marshall the parameters */ |
| 123 | param[0] = htonl(VLPROBE); |
| 124 | piov[0].iov_len = sizeof(param); |
| 125 | piov[0].iov_base = param; |
| 126 | |
| 127 | /* send the parameters to the server */ |
| 128 | ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, |
| 129 | alloc_flags, 0, &sent); |
| 130 | if (ret < 0) |
| 131 | goto abort; |
| 132 | |
| 133 | /* wait for the reply to completely arrive */ |
| 134 | for (;;) { |
| 135 | set_current_state(TASK_INTERRUPTIBLE); |
| 136 | if (call->app_call_state != RXRPC_CSTATE_CLNT_RCV_REPLY || |
| 137 | signal_pending(current)) |
| 138 | break; |
| 139 | schedule(); |
| 140 | } |
| 141 | set_current_state(TASK_RUNNING); |
| 142 | |
| 143 | ret = -EINTR; |
| 144 | if (signal_pending(current)) |
| 145 | goto abort; |
| 146 | |
| 147 | switch (call->app_call_state) { |
| 148 | case RXRPC_CSTATE_ERROR: |
| 149 | ret = call->app_errno; |
| 150 | goto out_unwait; |
| 151 | |
| 152 | case RXRPC_CSTATE_CLNT_GOT_REPLY: |
| 153 | ret = 0; |
| 154 | goto out_unwait; |
| 155 | |
| 156 | default: |
| 157 | BUG(); |
| 158 | } |
| 159 | |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 160 | abort: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 162 | rxrpc_call_abort(call, ret); |
| 163 | schedule(); |
| 164 | |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 165 | out_unwait: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | set_current_state(TASK_RUNNING); |
| 167 | remove_wait_queue(&call->waitq, &myself); |
| 168 | rxrpc_put_call(call); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 169 | out_put_conn: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | rxrpc_put_connection(conn); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 171 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | return ret; |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 173 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | #endif |
| 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | /* |
| 177 | * look up a volume location database entry by name |
| 178 | */ |
| 179 | int afs_rxvl_get_entry_by_name(struct afs_server *server, |
| 180 | const char *volname, |
| 181 | unsigned volnamesz, |
| 182 | struct afs_cache_vlocation *entry) |
| 183 | { |
| 184 | DECLARE_WAITQUEUE(myself, current); |
| 185 | |
| 186 | struct rxrpc_connection *conn; |
| 187 | struct rxrpc_call *call; |
| 188 | struct kvec piov[3]; |
| 189 | unsigned tmp; |
| 190 | size_t sent; |
| 191 | int ret, loop; |
| 192 | __be32 *bp, param[2], zero; |
| 193 | |
| 194 | _enter(",%*.*s,%u,", volnamesz, volnamesz, volname, volnamesz); |
| 195 | |
| 196 | memset(entry, 0, sizeof(*entry)); |
| 197 | |
| 198 | /* get hold of the vlserver connection */ |
| 199 | ret = afs_server_get_vlconn(server, &conn); |
| 200 | if (ret < 0) |
| 201 | goto out; |
| 202 | |
| 203 | /* create a call through that connection */ |
| 204 | ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call); |
| 205 | if (ret < 0) { |
| 206 | printk("kAFS: Unable to create call: %d\n", ret); |
| 207 | goto out_put_conn; |
| 208 | } |
| 209 | call->app_opcode = VLGETENTRYBYNAME; |
| 210 | |
| 211 | /* we want to get event notifications from the call */ |
| 212 | add_wait_queue(&call->waitq, &myself); |
| 213 | |
| 214 | /* marshall the parameters */ |
| 215 | piov[1].iov_len = volnamesz; |
| 216 | piov[1].iov_base = (char *) volname; |
| 217 | |
| 218 | zero = 0; |
| 219 | piov[2].iov_len = (4 - (piov[1].iov_len & 3)) & 3; |
| 220 | piov[2].iov_base = &zero; |
| 221 | |
| 222 | param[0] = htonl(VLGETENTRYBYNAME); |
| 223 | param[1] = htonl(piov[1].iov_len); |
| 224 | |
| 225 | piov[0].iov_len = sizeof(param); |
| 226 | piov[0].iov_base = param; |
| 227 | |
| 228 | /* send the parameters to the server */ |
| 229 | ret = rxrpc_call_write_data(call, 3, piov, RXRPC_LAST_PACKET, GFP_NOFS, |
| 230 | 0, &sent); |
| 231 | if (ret < 0) |
| 232 | goto abort; |
| 233 | |
| 234 | /* wait for the reply to completely arrive */ |
| 235 | bp = rxrpc_call_alloc_scratch(call, 384); |
| 236 | |
| 237 | ret = rxrpc_call_read_data(call, bp, 384, |
| 238 | RXRPC_CALL_READ_BLOCK | |
| 239 | RXRPC_CALL_READ_ALL); |
| 240 | if (ret < 0) { |
| 241 | if (ret == -ECONNABORTED) { |
| 242 | ret = call->app_errno; |
| 243 | goto out_unwait; |
| 244 | } |
| 245 | goto abort; |
| 246 | } |
| 247 | |
| 248 | /* unmarshall the reply */ |
| 249 | for (loop = 0; loop < 64; loop++) |
| 250 | entry->name[loop] = ntohl(*bp++); |
| 251 | bp++; /* final NUL */ |
| 252 | |
| 253 | bp++; /* type */ |
| 254 | entry->nservers = ntohl(*bp++); |
| 255 | |
| 256 | for (loop = 0; loop < 8; loop++) |
| 257 | entry->servers[loop].s_addr = *bp++; |
| 258 | |
| 259 | bp += 8; /* partition IDs */ |
| 260 | |
| 261 | for (loop = 0; loop < 8; loop++) { |
| 262 | tmp = ntohl(*bp++); |
| 263 | if (tmp & AFS_VLSF_RWVOL) |
| 264 | entry->srvtmask[loop] |= AFS_VOL_VTM_RW; |
| 265 | if (tmp & AFS_VLSF_ROVOL) |
| 266 | entry->srvtmask[loop] |= AFS_VOL_VTM_RO; |
| 267 | if (tmp & AFS_VLSF_BACKVOL) |
| 268 | entry->srvtmask[loop] |= AFS_VOL_VTM_BAK; |
| 269 | } |
| 270 | |
| 271 | entry->vid[0] = ntohl(*bp++); |
| 272 | entry->vid[1] = ntohl(*bp++); |
| 273 | entry->vid[2] = ntohl(*bp++); |
| 274 | |
| 275 | bp++; /* clone ID */ |
| 276 | |
| 277 | tmp = ntohl(*bp++); /* flags */ |
| 278 | if (tmp & AFS_VLF_RWEXISTS) |
| 279 | entry->vidmask |= AFS_VOL_VTM_RW; |
| 280 | if (tmp & AFS_VLF_ROEXISTS) |
| 281 | entry->vidmask |= AFS_VOL_VTM_RO; |
| 282 | if (tmp & AFS_VLF_BACKEXISTS) |
| 283 | entry->vidmask |= AFS_VOL_VTM_BAK; |
| 284 | |
| 285 | ret = -ENOMEDIUM; |
| 286 | if (!entry->vidmask) |
| 287 | goto abort; |
| 288 | |
| 289 | /* success */ |
| 290 | entry->rtime = get_seconds(); |
| 291 | ret = 0; |
| 292 | |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 293 | out_unwait: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | set_current_state(TASK_RUNNING); |
| 295 | remove_wait_queue(&call->waitq, &myself); |
| 296 | rxrpc_put_call(call); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 297 | out_put_conn: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | rxrpc_put_connection(conn); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 299 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | _leave(" = %d", ret); |
| 301 | return ret; |
| 302 | |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 303 | abort: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 305 | rxrpc_call_abort(call, ret); |
| 306 | schedule(); |
| 307 | goto out_unwait; |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 308 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | /* |
| 311 | * look up a volume location database entry by ID |
| 312 | */ |
| 313 | int afs_rxvl_get_entry_by_id(struct afs_server *server, |
| 314 | afs_volid_t volid, |
| 315 | afs_voltype_t voltype, |
| 316 | struct afs_cache_vlocation *entry) |
| 317 | { |
| 318 | DECLARE_WAITQUEUE(myself, current); |
| 319 | |
| 320 | struct rxrpc_connection *conn; |
| 321 | struct rxrpc_call *call; |
| 322 | struct kvec piov[1]; |
| 323 | unsigned tmp; |
| 324 | size_t sent; |
| 325 | int ret, loop; |
| 326 | __be32 *bp, param[3]; |
| 327 | |
| 328 | _enter(",%x,%d,", volid, voltype); |
| 329 | |
| 330 | memset(entry, 0, sizeof(*entry)); |
| 331 | |
| 332 | /* get hold of the vlserver connection */ |
| 333 | ret = afs_server_get_vlconn(server, &conn); |
| 334 | if (ret < 0) |
| 335 | goto out; |
| 336 | |
| 337 | /* create a call through that connection */ |
| 338 | ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call); |
| 339 | if (ret < 0) { |
| 340 | printk("kAFS: Unable to create call: %d\n", ret); |
| 341 | goto out_put_conn; |
| 342 | } |
| 343 | call->app_opcode = VLGETENTRYBYID; |
| 344 | |
| 345 | /* we want to get event notifications from the call */ |
| 346 | add_wait_queue(&call->waitq, &myself); |
| 347 | |
| 348 | /* marshall the parameters */ |
| 349 | param[0] = htonl(VLGETENTRYBYID); |
| 350 | param[1] = htonl(volid); |
| 351 | param[2] = htonl(voltype); |
| 352 | |
| 353 | piov[0].iov_len = sizeof(param); |
| 354 | piov[0].iov_base = param; |
| 355 | |
| 356 | /* send the parameters to the server */ |
| 357 | ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS, |
| 358 | 0, &sent); |
| 359 | if (ret < 0) |
| 360 | goto abort; |
| 361 | |
| 362 | /* wait for the reply to completely arrive */ |
| 363 | bp = rxrpc_call_alloc_scratch(call, 384); |
| 364 | |
| 365 | ret = rxrpc_call_read_data(call, bp, 384, |
| 366 | RXRPC_CALL_READ_BLOCK | |
| 367 | RXRPC_CALL_READ_ALL); |
| 368 | if (ret < 0) { |
| 369 | if (ret == -ECONNABORTED) { |
| 370 | ret = call->app_errno; |
| 371 | goto out_unwait; |
| 372 | } |
| 373 | goto abort; |
| 374 | } |
| 375 | |
| 376 | /* unmarshall the reply */ |
| 377 | for (loop = 0; loop < 64; loop++) |
| 378 | entry->name[loop] = ntohl(*bp++); |
| 379 | bp++; /* final NUL */ |
| 380 | |
| 381 | bp++; /* type */ |
| 382 | entry->nservers = ntohl(*bp++); |
| 383 | |
| 384 | for (loop = 0; loop < 8; loop++) |
| 385 | entry->servers[loop].s_addr = *bp++; |
| 386 | |
| 387 | bp += 8; /* partition IDs */ |
| 388 | |
| 389 | for (loop = 0; loop < 8; loop++) { |
| 390 | tmp = ntohl(*bp++); |
| 391 | if (tmp & AFS_VLSF_RWVOL) |
| 392 | entry->srvtmask[loop] |= AFS_VOL_VTM_RW; |
| 393 | if (tmp & AFS_VLSF_ROVOL) |
| 394 | entry->srvtmask[loop] |= AFS_VOL_VTM_RO; |
| 395 | if (tmp & AFS_VLSF_BACKVOL) |
| 396 | entry->srvtmask[loop] |= AFS_VOL_VTM_BAK; |
| 397 | } |
| 398 | |
| 399 | entry->vid[0] = ntohl(*bp++); |
| 400 | entry->vid[1] = ntohl(*bp++); |
| 401 | entry->vid[2] = ntohl(*bp++); |
| 402 | |
| 403 | bp++; /* clone ID */ |
| 404 | |
| 405 | tmp = ntohl(*bp++); /* flags */ |
| 406 | if (tmp & AFS_VLF_RWEXISTS) |
| 407 | entry->vidmask |= AFS_VOL_VTM_RW; |
| 408 | if (tmp & AFS_VLF_ROEXISTS) |
| 409 | entry->vidmask |= AFS_VOL_VTM_RO; |
| 410 | if (tmp & AFS_VLF_BACKEXISTS) |
| 411 | entry->vidmask |= AFS_VOL_VTM_BAK; |
| 412 | |
| 413 | ret = -ENOMEDIUM; |
| 414 | if (!entry->vidmask) |
| 415 | goto abort; |
| 416 | |
| 417 | #if 0 /* TODO: remove */ |
| 418 | entry->nservers = 3; |
| 419 | entry->servers[0].s_addr = htonl(0xac101249); |
| 420 | entry->servers[1].s_addr = htonl(0xac101243); |
| 421 | entry->servers[2].s_addr = htonl(0xac10125b /*0xac10125b*/); |
| 422 | |
| 423 | entry->srvtmask[0] = AFS_VOL_VTM_RO; |
| 424 | entry->srvtmask[1] = AFS_VOL_VTM_RO; |
| 425 | entry->srvtmask[2] = AFS_VOL_VTM_RO | AFS_VOL_VTM_RW; |
| 426 | #endif |
| 427 | |
| 428 | /* success */ |
| 429 | entry->rtime = get_seconds(); |
| 430 | ret = 0; |
| 431 | |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 432 | out_unwait: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | set_current_state(TASK_RUNNING); |
| 434 | remove_wait_queue(&call->waitq, &myself); |
| 435 | rxrpc_put_call(call); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 436 | out_put_conn: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | rxrpc_put_connection(conn); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 438 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | _leave(" = %d", ret); |
| 440 | return ret; |
| 441 | |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 442 | abort: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 444 | rxrpc_call_abort(call, ret); |
| 445 | schedule(); |
| 446 | goto out_unwait; |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 447 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | /* |
| 450 | * look up a volume location database entry by ID asynchronously |
| 451 | */ |
| 452 | int afs_rxvl_get_entry_by_id_async(struct afs_async_op *op, |
| 453 | afs_volid_t volid, |
| 454 | afs_voltype_t voltype) |
| 455 | { |
| 456 | struct rxrpc_connection *conn; |
| 457 | struct rxrpc_call *call; |
| 458 | struct kvec piov[1]; |
| 459 | size_t sent; |
| 460 | int ret; |
| 461 | __be32 param[3]; |
| 462 | |
| 463 | _enter(",%x,%d,", volid, voltype); |
| 464 | |
| 465 | /* get hold of the vlserver connection */ |
| 466 | ret = afs_server_get_vlconn(op->server, &conn); |
| 467 | if (ret < 0) { |
| 468 | _leave(" = %d", ret); |
| 469 | return ret; |
| 470 | } |
| 471 | |
| 472 | /* create a call through that connection */ |
| 473 | ret = rxrpc_create_call(conn, |
| 474 | afs_rxvl_get_entry_by_id_attn, |
| 475 | afs_rxvl_get_entry_by_id_error, |
| 476 | afs_rxvl_aemap, |
| 477 | &op->call); |
| 478 | rxrpc_put_connection(conn); |
| 479 | |
| 480 | if (ret < 0) { |
| 481 | printk("kAFS: Unable to create call: %d\n", ret); |
| 482 | _leave(" = %d", ret); |
| 483 | return ret; |
| 484 | } |
| 485 | |
| 486 | op->call->app_opcode = VLGETENTRYBYID; |
| 487 | op->call->app_user = op; |
| 488 | |
| 489 | call = op->call; |
| 490 | rxrpc_get_call(call); |
| 491 | |
| 492 | /* send event notifications from the call to kafsasyncd */ |
| 493 | afs_kafsasyncd_begin_op(op); |
| 494 | |
| 495 | /* marshall the parameters */ |
| 496 | param[0] = htonl(VLGETENTRYBYID); |
| 497 | param[1] = htonl(volid); |
| 498 | param[2] = htonl(voltype); |
| 499 | |
| 500 | piov[0].iov_len = sizeof(param); |
| 501 | piov[0].iov_base = param; |
| 502 | |
| 503 | /* allocate result read buffer in scratch space */ |
| 504 | call->app_scr_ptr = rxrpc_call_alloc_scratch(op->call, 384); |
| 505 | |
| 506 | /* send the parameters to the server */ |
| 507 | ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS, |
| 508 | 0, &sent); |
| 509 | if (ret < 0) { |
| 510 | rxrpc_call_abort(call, ret); /* handle from kafsasyncd */ |
| 511 | ret = 0; |
| 512 | goto out; |
| 513 | } |
| 514 | |
| 515 | /* wait for the reply to completely arrive */ |
| 516 | ret = rxrpc_call_read_data(call, call->app_scr_ptr, 384, 0); |
| 517 | switch (ret) { |
| 518 | case 0: |
| 519 | case -EAGAIN: |
| 520 | case -ECONNABORTED: |
| 521 | ret = 0; |
| 522 | break; /* all handled by kafsasyncd */ |
| 523 | |
| 524 | default: |
| 525 | rxrpc_call_abort(call, ret); /* make kafsasyncd handle it */ |
| 526 | ret = 0; |
| 527 | break; |
| 528 | } |
| 529 | |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 530 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | rxrpc_put_call(call); |
| 532 | _leave(" = %d", ret); |
| 533 | return ret; |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 534 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | /* |
| 537 | * attend to the asynchronous get VLDB entry by ID |
| 538 | */ |
| 539 | int afs_rxvl_get_entry_by_id_async2(struct afs_async_op *op, |
| 540 | struct afs_cache_vlocation *entry) |
| 541 | { |
| 542 | __be32 *bp; |
| 543 | __u32 tmp; |
| 544 | int loop, ret; |
| 545 | |
| 546 | _enter("{op=%p cst=%u}", op, op->call->app_call_state); |
| 547 | |
| 548 | memset(entry, 0, sizeof(*entry)); |
| 549 | |
| 550 | if (op->call->app_call_state == RXRPC_CSTATE_COMPLETE) { |
| 551 | /* operation finished */ |
| 552 | afs_kafsasyncd_terminate_op(op); |
| 553 | |
| 554 | bp = op->call->app_scr_ptr; |
| 555 | |
| 556 | /* unmarshall the reply */ |
| 557 | for (loop = 0; loop < 64; loop++) |
| 558 | entry->name[loop] = ntohl(*bp++); |
| 559 | bp++; /* final NUL */ |
| 560 | |
| 561 | bp++; /* type */ |
| 562 | entry->nservers = ntohl(*bp++); |
| 563 | |
| 564 | for (loop = 0; loop < 8; loop++) |
| 565 | entry->servers[loop].s_addr = *bp++; |
| 566 | |
| 567 | bp += 8; /* partition IDs */ |
| 568 | |
| 569 | for (loop = 0; loop < 8; loop++) { |
| 570 | tmp = ntohl(*bp++); |
| 571 | if (tmp & AFS_VLSF_RWVOL) |
| 572 | entry->srvtmask[loop] |= AFS_VOL_VTM_RW; |
| 573 | if (tmp & AFS_VLSF_ROVOL) |
| 574 | entry->srvtmask[loop] |= AFS_VOL_VTM_RO; |
| 575 | if (tmp & AFS_VLSF_BACKVOL) |
| 576 | entry->srvtmask[loop] |= AFS_VOL_VTM_BAK; |
| 577 | } |
| 578 | |
| 579 | entry->vid[0] = ntohl(*bp++); |
| 580 | entry->vid[1] = ntohl(*bp++); |
| 581 | entry->vid[2] = ntohl(*bp++); |
| 582 | |
| 583 | bp++; /* clone ID */ |
| 584 | |
| 585 | tmp = ntohl(*bp++); /* flags */ |
| 586 | if (tmp & AFS_VLF_RWEXISTS) |
| 587 | entry->vidmask |= AFS_VOL_VTM_RW; |
| 588 | if (tmp & AFS_VLF_ROEXISTS) |
| 589 | entry->vidmask |= AFS_VOL_VTM_RO; |
| 590 | if (tmp & AFS_VLF_BACKEXISTS) |
| 591 | entry->vidmask |= AFS_VOL_VTM_BAK; |
| 592 | |
| 593 | ret = -ENOMEDIUM; |
| 594 | if (!entry->vidmask) { |
| 595 | rxrpc_call_abort(op->call, ret); |
| 596 | goto done; |
| 597 | } |
| 598 | |
| 599 | #if 0 /* TODO: remove */ |
| 600 | entry->nservers = 3; |
| 601 | entry->servers[0].s_addr = htonl(0xac101249); |
| 602 | entry->servers[1].s_addr = htonl(0xac101243); |
| 603 | entry->servers[2].s_addr = htonl(0xac10125b /*0xac10125b*/); |
| 604 | |
| 605 | entry->srvtmask[0] = AFS_VOL_VTM_RO; |
| 606 | entry->srvtmask[1] = AFS_VOL_VTM_RO; |
| 607 | entry->srvtmask[2] = AFS_VOL_VTM_RO | AFS_VOL_VTM_RW; |
| 608 | #endif |
| 609 | |
| 610 | /* success */ |
| 611 | entry->rtime = get_seconds(); |
| 612 | ret = 0; |
| 613 | goto done; |
| 614 | } |
| 615 | |
| 616 | if (op->call->app_call_state == RXRPC_CSTATE_ERROR) { |
| 617 | /* operation error */ |
| 618 | ret = op->call->app_errno; |
| 619 | goto done; |
| 620 | } |
| 621 | |
| 622 | _leave(" = -EAGAIN"); |
| 623 | return -EAGAIN; |
| 624 | |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 625 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | rxrpc_put_call(op->call); |
| 627 | op->call = NULL; |
| 628 | _leave(" = %d", ret); |
| 629 | return ret; |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 630 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | /* |
| 633 | * handle attention events on an async get-entry-by-ID op |
| 634 | * - called from krxiod |
| 635 | */ |
| 636 | static void afs_rxvl_get_entry_by_id_attn(struct rxrpc_call *call) |
| 637 | { |
| 638 | struct afs_async_op *op = call->app_user; |
| 639 | |
| 640 | _enter("{op=%p cst=%u}", op, call->app_call_state); |
| 641 | |
| 642 | switch (call->app_call_state) { |
| 643 | case RXRPC_CSTATE_COMPLETE: |
| 644 | afs_kafsasyncd_attend_op(op); |
| 645 | break; |
| 646 | case RXRPC_CSTATE_CLNT_RCV_REPLY: |
| 647 | if (call->app_async_read) |
| 648 | break; |
| 649 | case RXRPC_CSTATE_CLNT_GOT_REPLY: |
| 650 | if (call->app_read_count == 0) |
| 651 | break; |
| 652 | printk("kAFS: Reply bigger than expected" |
| 653 | " {cst=%u asyn=%d mark=%Zu rdy=%Zu pr=%u%s}", |
| 654 | call->app_call_state, |
| 655 | call->app_async_read, |
| 656 | call->app_mark, |
| 657 | call->app_ready_qty, |
| 658 | call->pkt_rcv_count, |
| 659 | call->app_last_rcv ? " last" : ""); |
| 660 | |
| 661 | rxrpc_call_abort(call, -EBADMSG); |
| 662 | break; |
| 663 | default: |
| 664 | BUG(); |
| 665 | } |
| 666 | |
| 667 | _leave(""); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 668 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | /* |
| 671 | * handle error events on an async get-entry-by-ID op |
| 672 | * - called from krxiod |
| 673 | */ |
| 674 | static void afs_rxvl_get_entry_by_id_error(struct rxrpc_call *call) |
| 675 | { |
| 676 | struct afs_async_op *op = call->app_user; |
| 677 | |
| 678 | _enter("{op=%p cst=%u}", op, call->app_call_state); |
| 679 | |
| 680 | afs_kafsasyncd_attend_op(op); |
| 681 | |
| 682 | _leave(""); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 683 | } |