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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ec26815a | 2 | /* AFS Volume Location Service client |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
1da177e4 LT |
6 | */ |
7 | ||
5a0e3ad6 | 8 | #include <linux/gfp.h> |
1da177e4 LT |
9 | #include <linux/init.h> |
10 | #include <linux/sched.h> | |
4d9df986 | 11 | #include "afs_fs.h" |
1da177e4 LT |
12 | #include "internal.h" |
13 | ||
1da177e4 | 14 | /* |
d2ddc776 | 15 | * Deliver reply data to a VL.GetEntryByNameU call. |
1da177e4 | 16 | */ |
d2ddc776 | 17 | static int afs_deliver_vl_get_entry_by_name_u(struct afs_call *call) |
1da177e4 | 18 | { |
d2ddc776 DH |
19 | struct afs_uvldbentry__xdr *uvldb; |
20 | struct afs_vldb_entry *entry; | |
21 | bool new_only = false; | |
1fba5868 | 22 | u32 tmp, nr_servers, vlflags; |
d2ddc776 | 23 | int i, ret; |
1da177e4 | 24 | |
d001648e | 25 | _enter(""); |
1da177e4 | 26 | |
d001648e | 27 | ret = afs_transfer_reply(call); |
372ee163 DH |
28 | if (ret < 0) |
29 | return ret; | |
1da177e4 | 30 | |
08e0e7c8 | 31 | /* unmarshall the reply once we've received all of it */ |
d2ddc776 | 32 | uvldb = call->buffer; |
ffba718e | 33 | entry = call->ret_vldb; |
d2ddc776 | 34 | |
45df8462 DH |
35 | nr_servers = ntohl(uvldb->nServers); |
36 | if (nr_servers > AFS_NMAXNSERVERS) | |
37 | nr_servers = AFS_NMAXNSERVERS; | |
38 | ||
d2ddc776 DH |
39 | for (i = 0; i < ARRAY_SIZE(uvldb->name) - 1; i++) |
40 | entry->name[i] = (u8)ntohl(uvldb->name[i]); | |
41 | entry->name[i] = 0; | |
42 | entry->name_len = strlen(entry->name); | |
43 | ||
44 | /* If there is a new replication site that we can use, ignore all the | |
45 | * sites that aren't marked as new. | |
46 | */ | |
45df8462 | 47 | for (i = 0; i < nr_servers; i++) { |
d2ddc776 DH |
48 | tmp = ntohl(uvldb->serverFlags[i]); |
49 | if (!(tmp & AFS_VLSF_DONTUSE) && | |
50 | (tmp & AFS_VLSF_NEWREPSITE)) | |
51 | new_only = true; | |
4d9df986 | 52 | } |
1da177e4 | 53 | |
1fba5868 | 54 | vlflags = ntohl(uvldb->flags); |
45df8462 | 55 | for (i = 0; i < nr_servers; i++) { |
d2ddc776 DH |
56 | struct afs_uuid__xdr *xdr; |
57 | struct afs_uuid *uuid; | |
58 | int j; | |
4a46fdba | 59 | int n = entry->nr_servers; |
1da177e4 | 60 | |
d2ddc776 DH |
61 | tmp = ntohl(uvldb->serverFlags[i]); |
62 | if (tmp & AFS_VLSF_DONTUSE || | |
63 | (new_only && !(tmp & AFS_VLSF_NEWREPSITE))) | |
64 | continue; | |
1fba5868 | 65 | if (tmp & AFS_VLSF_RWVOL) { |
4a46fdba | 66 | entry->fs_mask[n] |= AFS_VOL_VTM_RW; |
1fba5868 | 67 | if (vlflags & AFS_VLF_BACKEXISTS) |
4a46fdba | 68 | entry->fs_mask[n] |= AFS_VOL_VTM_BAK; |
1fba5868 | 69 | } |
1da177e4 | 70 | if (tmp & AFS_VLSF_ROVOL) |
4a46fdba MD |
71 | entry->fs_mask[n] |= AFS_VOL_VTM_RO; |
72 | if (!entry->fs_mask[n]) | |
d2ddc776 DH |
73 | continue; |
74 | ||
75 | xdr = &uvldb->serverNumber[i]; | |
4a46fdba | 76 | uuid = (struct afs_uuid *)&entry->fs_server[n]; |
d2ddc776 DH |
77 | uuid->time_low = xdr->time_low; |
78 | uuid->time_mid = htons(ntohl(xdr->time_mid)); | |
79 | uuid->time_hi_and_version = htons(ntohl(xdr->time_hi_and_version)); | |
80 | uuid->clock_seq_hi_and_reserved = (u8)ntohl(xdr->clock_seq_hi_and_reserved); | |
81 | uuid->clock_seq_low = (u8)ntohl(xdr->clock_seq_low); | |
82 | for (j = 0; j < 6; j++) | |
83 | uuid->node[j] = (u8)ntohl(xdr->node[j]); | |
1da177e4 | 84 | |
d2ddc776 DH |
85 | entry->nr_servers++; |
86 | } | |
1da177e4 | 87 | |
d2ddc776 DH |
88 | for (i = 0; i < AFS_MAXTYPES; i++) |
89 | entry->vid[i] = ntohl(uvldb->volumeId[i]); | |
1da177e4 | 90 | |
1fba5868 | 91 | if (vlflags & AFS_VLF_RWEXISTS) |
d2ddc776 | 92 | __set_bit(AFS_VLDB_HAS_RW, &entry->flags); |
1fba5868 | 93 | if (vlflags & AFS_VLF_ROEXISTS) |
d2ddc776 | 94 | __set_bit(AFS_VLDB_HAS_RO, &entry->flags); |
1fba5868 | 95 | if (vlflags & AFS_VLF_BACKEXISTS) |
d2ddc776 | 96 | __set_bit(AFS_VLDB_HAS_BAK, &entry->flags); |
08e0e7c8 | 97 | |
1fba5868 | 98 | if (!(vlflags & (AFS_VLF_RWEXISTS | AFS_VLF_ROEXISTS | AFS_VLF_BACKEXISTS))) { |
d2ddc776 DH |
99 | entry->error = -ENOMEDIUM; |
100 | __set_bit(AFS_VLDB_QUERY_ERROR, &entry->flags); | |
101 | } | |
102 | ||
103 | __set_bit(AFS_VLDB_QUERY_VALID, &entry->flags); | |
08e0e7c8 DH |
104 | _leave(" = 0 [done]"); |
105 | return 0; | |
ec26815a | 106 | } |
1da177e4 | 107 | |
d2ddc776 DH |
108 | static void afs_destroy_vl_get_entry_by_name_u(struct afs_call *call) |
109 | { | |
ffba718e | 110 | kfree(call->ret_vldb); |
d2ddc776 DH |
111 | afs_flat_call_destructor(call); |
112 | } | |
1da177e4 | 113 | |
08e0e7c8 | 114 | /* |
d2ddc776 | 115 | * VL.GetEntryByNameU operation type. |
08e0e7c8 | 116 | */ |
d2ddc776 DH |
117 | static const struct afs_call_type afs_RXVLGetEntryByNameU = { |
118 | .name = "VL.GetEntryByNameU", | |
025db80c | 119 | .op = afs_VL_GetEntryByNameU, |
d2ddc776 DH |
120 | .deliver = afs_deliver_vl_get_entry_by_name_u, |
121 | .destructor = afs_destroy_vl_get_entry_by_name_u, | |
08e0e7c8 | 122 | }; |
1da177e4 | 123 | |
1da177e4 | 124 | /* |
d2ddc776 DH |
125 | * Dispatch a get volume entry by name or ID operation (uuid variant). If the |
126 | * volname is a decimal number then it's a volume ID not a volume name. | |
1da177e4 | 127 | */ |
0a5143f2 | 128 | struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *vc, |
d2ddc776 DH |
129 | const char *volname, |
130 | int volnamesz) | |
1da177e4 | 131 | { |
d2ddc776 | 132 | struct afs_vldb_entry *entry; |
08e0e7c8 | 133 | struct afs_call *call; |
0a5143f2 | 134 | struct afs_net *net = vc->cell->net; |
d2ddc776 | 135 | size_t reqsz, padsz; |
08e0e7c8 | 136 | __be32 *bp; |
1da177e4 | 137 | |
08e0e7c8 | 138 | _enter(""); |
1da177e4 | 139 | |
08e0e7c8 DH |
140 | padsz = (4 - (volnamesz & 3)) & 3; |
141 | reqsz = 8 + volnamesz + padsz; | |
1da177e4 | 142 | |
d2ddc776 DH |
143 | entry = kzalloc(sizeof(struct afs_vldb_entry), GFP_KERNEL); |
144 | if (!entry) | |
145 | return ERR_PTR(-ENOMEM); | |
146 | ||
147 | call = afs_alloc_flat_call(net, &afs_RXVLGetEntryByNameU, reqsz, | |
148 | sizeof(struct afs_uvldbentry__xdr)); | |
149 | if (!call) { | |
150 | kfree(entry); | |
151 | return ERR_PTR(-ENOMEM); | |
152 | } | |
1da177e4 | 153 | |
0a5143f2 | 154 | call->key = vc->key; |
ffba718e | 155 | call->ret_vldb = entry; |
94f699c9 | 156 | call->max_lifespan = AFS_VL_MAX_LIFESPAN; |
1da177e4 | 157 | |
d2ddc776 | 158 | /* Marshall the parameters */ |
08e0e7c8 | 159 | bp = call->request; |
d2ddc776 | 160 | *bp++ = htonl(VLGETENTRYBYNAMEU); |
08e0e7c8 DH |
161 | *bp++ = htonl(volnamesz); |
162 | memcpy(bp, volname, volnamesz); | |
163 | if (padsz > 0) | |
d2ddc776 | 164 | memset((void *)bp + volnamesz, 0, padsz); |
08e0e7c8 | 165 | |
025db80c | 166 | trace_afs_make_vl_call(call); |
0b9bf381 DH |
167 | afs_make_call(&vc->ac, call, GFP_KERNEL); |
168 | return (struct afs_vldb_entry *)afs_wait_for_call_to_complete(call, &vc->ac); | |
ec26815a | 169 | } |
1da177e4 | 170 | |
1da177e4 | 171 | /* |
d2ddc776 DH |
172 | * Deliver reply data to a VL.GetAddrsU call. |
173 | * | |
174 | * GetAddrsU(IN ListAddrByAttributes *inaddr, | |
175 | * OUT afsUUID *uuidp1, | |
176 | * OUT uint32_t *uniquifier, | |
177 | * OUT uint32_t *nentries, | |
178 | * OUT bulkaddrs *blkaddrs); | |
1da177e4 | 179 | */ |
d2ddc776 | 180 | static int afs_deliver_vl_get_addrs_u(struct afs_call *call) |
1da177e4 | 181 | { |
d2ddc776 DH |
182 | struct afs_addr_list *alist; |
183 | __be32 *bp; | |
184 | u32 uniquifier, nentries, count; | |
185 | int i, ret; | |
186 | ||
12bdcf33 | 187 | _enter("{%u,%zu/%u}", |
fc276122 | 188 | call->unmarshall, iov_iter_count(call->iter), call->count); |
d2ddc776 | 189 | |
d2ddc776 DH |
190 | switch (call->unmarshall) { |
191 | case 0: | |
12bdcf33 DH |
192 | afs_extract_to_buf(call, |
193 | sizeof(struct afs_uuid__xdr) + 3 * sizeof(__be32)); | |
d2ddc776 DH |
194 | call->unmarshall++; |
195 | ||
e690c9e3 GS |
196 | /* Extract the returned uuid, uniquifier, nentries and |
197 | * blkaddrs size */ | |
198 | /* Fall through */ | |
d2ddc776 | 199 | case 1: |
12bdcf33 | 200 | ret = afs_extract_data(call, true); |
d2ddc776 DH |
201 | if (ret < 0) |
202 | return ret; | |
203 | ||
204 | bp = call->buffer + sizeof(struct afs_uuid__xdr); | |
205 | uniquifier = ntohl(*bp++); | |
206 | nentries = ntohl(*bp++); | |
207 | count = ntohl(*bp); | |
208 | ||
209 | nentries = min(nentries, count); | |
210 | alist = afs_alloc_addrlist(nentries, FS_SERVICE, AFS_FS_PORT); | |
211 | if (!alist) | |
212 | return -ENOMEM; | |
213 | alist->version = uniquifier; | |
ffba718e | 214 | call->ret_alist = alist; |
d2ddc776 DH |
215 | call->count = count; |
216 | call->count2 = nentries; | |
d2ddc776 DH |
217 | call->unmarshall++; |
218 | ||
12bdcf33 DH |
219 | more_entries: |
220 | count = min(call->count, 4U); | |
221 | afs_extract_to_buf(call, count * sizeof(__be32)); | |
222 | ||
e690c9e3 | 223 | /* Fall through - and extract entries */ |
d2ddc776 | 224 | case 2: |
12bdcf33 | 225 | ret = afs_extract_data(call, call->count > 4); |
d2ddc776 DH |
226 | if (ret < 0) |
227 | return ret; | |
228 | ||
ffba718e | 229 | alist = call->ret_alist; |
d2ddc776 | 230 | bp = call->buffer; |
12bdcf33 | 231 | count = min(call->count, 4U); |
d2ddc776 DH |
232 | for (i = 0; i < count; i++) |
233 | if (alist->nr_addrs < call->count2) | |
bf99a53c | 234 | afs_merge_fs_addr4(alist, *bp++, AFS_FS_PORT); |
d2ddc776 DH |
235 | |
236 | call->count -= count; | |
237 | if (call->count > 0) | |
12bdcf33 | 238 | goto more_entries; |
d2ddc776 DH |
239 | call->unmarshall++; |
240 | break; | |
241 | } | |
242 | ||
243 | _leave(" = 0 [done]"); | |
244 | return 0; | |
245 | } | |
246 | ||
247 | static void afs_vl_get_addrs_u_destructor(struct afs_call *call) | |
248 | { | |
ffba718e | 249 | afs_put_addrlist(call->ret_alist); |
d2ddc776 DH |
250 | return afs_flat_call_destructor(call); |
251 | } | |
252 | ||
253 | /* | |
254 | * VL.GetAddrsU operation type. | |
255 | */ | |
256 | static const struct afs_call_type afs_RXVLGetAddrsU = { | |
257 | .name = "VL.GetAddrsU", | |
025db80c | 258 | .op = afs_VL_GetAddrsU, |
d2ddc776 DH |
259 | .deliver = afs_deliver_vl_get_addrs_u, |
260 | .destructor = afs_vl_get_addrs_u_destructor, | |
261 | }; | |
262 | ||
263 | /* | |
264 | * Dispatch an operation to get the addresses for a server, where the server is | |
265 | * nominated by UUID. | |
266 | */ | |
0a5143f2 | 267 | struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *vc, |
d2ddc776 DH |
268 | const uuid_t *uuid) |
269 | { | |
270 | struct afs_ListAddrByAttributes__xdr *r; | |
271 | const struct afs_uuid *u = (const struct afs_uuid *)uuid; | |
08e0e7c8 | 272 | struct afs_call *call; |
0a5143f2 | 273 | struct afs_net *net = vc->cell->net; |
1da177e4 | 274 | __be32 *bp; |
d2ddc776 | 275 | int i; |
1da177e4 | 276 | |
08e0e7c8 | 277 | _enter(""); |
1da177e4 | 278 | |
d2ddc776 DH |
279 | call = afs_alloc_flat_call(net, &afs_RXVLGetAddrsU, |
280 | sizeof(__be32) + sizeof(struct afs_ListAddrByAttributes__xdr), | |
281 | sizeof(struct afs_uuid__xdr) + 3 * sizeof(__be32)); | |
08e0e7c8 | 282 | if (!call) |
d2ddc776 | 283 | return ERR_PTR(-ENOMEM); |
1da177e4 | 284 | |
0a5143f2 | 285 | call->key = vc->key; |
ffba718e | 286 | call->ret_alist = NULL; |
94f699c9 | 287 | call->max_lifespan = AFS_VL_MAX_LIFESPAN; |
1da177e4 | 288 | |
d2ddc776 | 289 | /* Marshall the parameters */ |
08e0e7c8 | 290 | bp = call->request; |
d2ddc776 DH |
291 | *bp++ = htonl(VLGETADDRSU); |
292 | r = (struct afs_ListAddrByAttributes__xdr *)bp; | |
293 | r->Mask = htonl(AFS_VLADDR_UUID); | |
294 | r->ipaddr = 0; | |
295 | r->index = 0; | |
296 | r->spare = 0; | |
297 | r->uuid.time_low = u->time_low; | |
298 | r->uuid.time_mid = htonl(ntohs(u->time_mid)); | |
299 | r->uuid.time_hi_and_version = htonl(ntohs(u->time_hi_and_version)); | |
300 | r->uuid.clock_seq_hi_and_reserved = htonl(u->clock_seq_hi_and_reserved); | |
301 | r->uuid.clock_seq_low = htonl(u->clock_seq_low); | |
302 | for (i = 0; i < 6; i++) | |
fe342cf7 | 303 | r->uuid.node[i] = htonl(u->node[i]); |
1da177e4 | 304 | |
025db80c | 305 | trace_afs_make_vl_call(call); |
0b9bf381 DH |
306 | afs_make_call(&vc->ac, call, GFP_KERNEL); |
307 | return (struct afs_addr_list *)afs_wait_for_call_to_complete(call, &vc->ac); | |
ec26815a | 308 | } |
bf99a53c DH |
309 | |
310 | /* | |
311 | * Deliver reply data to an VL.GetCapabilities operation. | |
312 | */ | |
313 | static int afs_deliver_vl_get_capabilities(struct afs_call *call) | |
314 | { | |
315 | u32 count; | |
316 | int ret; | |
317 | ||
12bdcf33 | 318 | _enter("{%u,%zu/%u}", |
fc276122 | 319 | call->unmarshall, iov_iter_count(call->iter), call->count); |
bf99a53c | 320 | |
bf99a53c DH |
321 | switch (call->unmarshall) { |
322 | case 0: | |
12bdcf33 | 323 | afs_extract_to_tmp(call); |
bf99a53c DH |
324 | call->unmarshall++; |
325 | ||
e690c9e3 | 326 | /* Fall through - and extract the capabilities word count */ |
bf99a53c | 327 | case 1: |
12bdcf33 | 328 | ret = afs_extract_data(call, true); |
bf99a53c DH |
329 | if (ret < 0) |
330 | return ret; | |
331 | ||
332 | count = ntohl(call->tmp); | |
bf99a53c DH |
333 | call->count = count; |
334 | call->count2 = count; | |
12bdcf33 | 335 | |
bf99a53c | 336 | call->unmarshall++; |
12bdcf33 | 337 | afs_extract_discard(call, count * sizeof(__be32)); |
bf99a53c | 338 | |
e690c9e3 | 339 | /* Fall through - and extract capabilities words */ |
bf99a53c | 340 | case 2: |
12bdcf33 | 341 | ret = afs_extract_data(call, false); |
bf99a53c DH |
342 | if (ret < 0) |
343 | return ret; | |
344 | ||
345 | /* TODO: Examine capabilities */ | |
346 | ||
bf99a53c DH |
347 | call->unmarshall++; |
348 | break; | |
349 | } | |
350 | ||
bf99a53c DH |
351 | _leave(" = 0 [done]"); |
352 | return 0; | |
353 | } | |
354 | ||
3bf0fb6f DH |
355 | static void afs_destroy_vl_get_capabilities(struct afs_call *call) |
356 | { | |
ffba718e | 357 | afs_put_vlserver(call->net, call->vlserver); |
3bf0fb6f DH |
358 | afs_flat_call_destructor(call); |
359 | } | |
360 | ||
bf99a53c DH |
361 | /* |
362 | * VL.GetCapabilities operation type | |
363 | */ | |
364 | static const struct afs_call_type afs_RXVLGetCapabilities = { | |
365 | .name = "VL.GetCapabilities", | |
025db80c | 366 | .op = afs_VL_GetCapabilities, |
bf99a53c | 367 | .deliver = afs_deliver_vl_get_capabilities, |
3bf0fb6f DH |
368 | .done = afs_vlserver_probe_result, |
369 | .destructor = afs_destroy_vl_get_capabilities, | |
bf99a53c DH |
370 | }; |
371 | ||
372 | /* | |
0a5143f2 | 373 | * Probe a volume server for the capabilities that it supports. This can |
bf99a53c DH |
374 | * return up to 196 words. |
375 | * | |
376 | * We use this to probe for service upgrade to determine what the server at the | |
377 | * other end supports. | |
378 | */ | |
0b9bf381 DH |
379 | struct afs_call *afs_vl_get_capabilities(struct afs_net *net, |
380 | struct afs_addr_cursor *ac, | |
381 | struct key *key, | |
382 | struct afs_vlserver *server, | |
383 | unsigned int server_index) | |
bf99a53c DH |
384 | { |
385 | struct afs_call *call; | |
386 | __be32 *bp; | |
387 | ||
388 | _enter(""); | |
389 | ||
390 | call = afs_alloc_flat_call(net, &afs_RXVLGetCapabilities, 1 * 4, 16 * 4); | |
391 | if (!call) | |
0b9bf381 | 392 | return ERR_PTR(-ENOMEM); |
bf99a53c DH |
393 | |
394 | call->key = key; | |
ffba718e DH |
395 | call->vlserver = afs_get_vlserver(server); |
396 | call->server_index = server_index; | |
3bf0fb6f | 397 | call->upgrade = true; |
0b9bf381 | 398 | call->async = true; |
94f699c9 | 399 | call->max_lifespan = AFS_PROBE_MAX_LIFESPAN; |
bf99a53c DH |
400 | |
401 | /* marshall the parameters */ | |
402 | bp = call->request; | |
403 | *bp++ = htonl(VLGETCAPABILITIES); | |
404 | ||
405 | /* Can't take a ref on server */ | |
025db80c | 406 | trace_afs_make_vl_call(call); |
0b9bf381 DH |
407 | afs_make_call(ac, call, GFP_KERNEL); |
408 | return call; | |
bf99a53c DH |
409 | } |
410 | ||
411 | /* | |
412 | * Deliver reply data to a YFSVL.GetEndpoints call. | |
413 | * | |
414 | * GetEndpoints(IN yfsServerAttributes *attr, | |
415 | * OUT opr_uuid *uuid, | |
416 | * OUT afs_int32 *uniquifier, | |
417 | * OUT endpoints *fsEndpoints, | |
418 | * OUT endpoints *volEndpoints) | |
419 | */ | |
420 | static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call) | |
421 | { | |
422 | struct afs_addr_list *alist; | |
423 | __be32 *bp; | |
424 | u32 uniquifier, size; | |
425 | int ret; | |
426 | ||
12bdcf33 | 427 | _enter("{%u,%zu,%u}", |
fc276122 | 428 | call->unmarshall, iov_iter_count(call->iter), call->count2); |
bf99a53c | 429 | |
bf99a53c DH |
430 | switch (call->unmarshall) { |
431 | case 0: | |
12bdcf33 | 432 | afs_extract_to_buf(call, sizeof(uuid_t) + 3 * sizeof(__be32)); |
bf99a53c DH |
433 | call->unmarshall = 1; |
434 | ||
435 | /* Extract the returned uuid, uniquifier, fsEndpoints count and | |
436 | * either the first fsEndpoint type or the volEndpoints | |
437 | * count if there are no fsEndpoints. */ | |
e690c9e3 | 438 | /* Fall through */ |
bf99a53c | 439 | case 1: |
12bdcf33 | 440 | ret = afs_extract_data(call, true); |
bf99a53c DH |
441 | if (ret < 0) |
442 | return ret; | |
443 | ||
444 | bp = call->buffer + sizeof(uuid_t); | |
445 | uniquifier = ntohl(*bp++); | |
446 | call->count = ntohl(*bp++); | |
447 | call->count2 = ntohl(*bp); /* Type or next count */ | |
448 | ||
449 | if (call->count > YFS_MAXENDPOINTS) | |
160cb957 DH |
450 | return afs_protocol_error(call, -EBADMSG, |
451 | afs_eproto_yvl_fsendpt_num); | |
bf99a53c DH |
452 | |
453 | alist = afs_alloc_addrlist(call->count, FS_SERVICE, AFS_FS_PORT); | |
454 | if (!alist) | |
455 | return -ENOMEM; | |
456 | alist->version = uniquifier; | |
ffba718e | 457 | call->ret_alist = alist; |
bf99a53c DH |
458 | |
459 | if (call->count == 0) | |
460 | goto extract_volendpoints; | |
461 | ||
12bdcf33 | 462 | next_fsendpoint: |
bf99a53c DH |
463 | switch (call->count2) { |
464 | case YFS_ENDPOINT_IPV4: | |
465 | size = sizeof(__be32) * (1 + 1 + 1); | |
466 | break; | |
467 | case YFS_ENDPOINT_IPV6: | |
468 | size = sizeof(__be32) * (1 + 4 + 1); | |
469 | break; | |
470 | default: | |
160cb957 DH |
471 | return afs_protocol_error(call, -EBADMSG, |
472 | afs_eproto_yvl_fsendpt_type); | |
bf99a53c DH |
473 | } |
474 | ||
475 | size += sizeof(__be32); | |
12bdcf33 DH |
476 | afs_extract_to_buf(call, size); |
477 | call->unmarshall = 2; | |
478 | ||
e690c9e3 | 479 | /* Fall through - and extract fsEndpoints[] entries */ |
12bdcf33 DH |
480 | case 2: |
481 | ret = afs_extract_data(call, true); | |
bf99a53c DH |
482 | if (ret < 0) |
483 | return ret; | |
484 | ||
ffba718e | 485 | alist = call->ret_alist; |
bf99a53c DH |
486 | bp = call->buffer; |
487 | switch (call->count2) { | |
488 | case YFS_ENDPOINT_IPV4: | |
489 | if (ntohl(bp[0]) != sizeof(__be32) * 2) | |
160cb957 DH |
490 | return afs_protocol_error(call, -EBADMSG, |
491 | afs_eproto_yvl_fsendpt4_len); | |
bf99a53c DH |
492 | afs_merge_fs_addr4(alist, bp[1], ntohl(bp[2])); |
493 | bp += 3; | |
494 | break; | |
495 | case YFS_ENDPOINT_IPV6: | |
496 | if (ntohl(bp[0]) != sizeof(__be32) * 5) | |
160cb957 DH |
497 | return afs_protocol_error(call, -EBADMSG, |
498 | afs_eproto_yvl_fsendpt6_len); | |
bf99a53c DH |
499 | afs_merge_fs_addr6(alist, bp + 1, ntohl(bp[5])); |
500 | bp += 6; | |
501 | break; | |
502 | default: | |
160cb957 DH |
503 | return afs_protocol_error(call, -EBADMSG, |
504 | afs_eproto_yvl_fsendpt_type); | |
bf99a53c DH |
505 | } |
506 | ||
507 | /* Got either the type of the next entry or the count of | |
508 | * volEndpoints if no more fsEndpoints. | |
509 | */ | |
fe342cf7 | 510 | call->count2 = ntohl(*bp++); |
bf99a53c | 511 | |
bf99a53c DH |
512 | call->count--; |
513 | if (call->count > 0) | |
12bdcf33 | 514 | goto next_fsendpoint; |
bf99a53c DH |
515 | |
516 | extract_volendpoints: | |
517 | /* Extract the list of volEndpoints. */ | |
518 | call->count = call->count2; | |
519 | if (!call->count) | |
520 | goto end; | |
521 | if (call->count > YFS_MAXENDPOINTS) | |
160cb957 DH |
522 | return afs_protocol_error(call, -EBADMSG, |
523 | afs_eproto_yvl_vlendpt_type); | |
bf99a53c | 524 | |
12bdcf33 | 525 | afs_extract_to_buf(call, 1 * sizeof(__be32)); |
bf99a53c DH |
526 | call->unmarshall = 3; |
527 | ||
528 | /* Extract the type of volEndpoints[0]. Normally we would | |
529 | * extract the type of the next endpoint when we extract the | |
530 | * data of the current one, but this is the first... | |
531 | */ | |
e690c9e3 | 532 | /* Fall through */ |
bf99a53c | 533 | case 3: |
12bdcf33 | 534 | ret = afs_extract_data(call, true); |
bf99a53c DH |
535 | if (ret < 0) |
536 | return ret; | |
537 | ||
538 | bp = call->buffer; | |
bf99a53c | 539 | |
12bdcf33 DH |
540 | next_volendpoint: |
541 | call->count2 = ntohl(*bp++); | |
bf99a53c DH |
542 | switch (call->count2) { |
543 | case YFS_ENDPOINT_IPV4: | |
544 | size = sizeof(__be32) * (1 + 1 + 1); | |
545 | break; | |
546 | case YFS_ENDPOINT_IPV6: | |
547 | size = sizeof(__be32) * (1 + 4 + 1); | |
548 | break; | |
549 | default: | |
160cb957 DH |
550 | return afs_protocol_error(call, -EBADMSG, |
551 | afs_eproto_yvl_vlendpt_type); | |
bf99a53c DH |
552 | } |
553 | ||
554 | if (call->count > 1) | |
12bdcf33 DH |
555 | size += sizeof(__be32); /* Get next type too */ |
556 | afs_extract_to_buf(call, size); | |
557 | call->unmarshall = 4; | |
558 | ||
e690c9e3 | 559 | /* Fall through - and extract volEndpoints[] entries */ |
12bdcf33 DH |
560 | case 4: |
561 | ret = afs_extract_data(call, true); | |
bf99a53c DH |
562 | if (ret < 0) |
563 | return ret; | |
564 | ||
565 | bp = call->buffer; | |
566 | switch (call->count2) { | |
567 | case YFS_ENDPOINT_IPV4: | |
568 | if (ntohl(bp[0]) != sizeof(__be32) * 2) | |
160cb957 DH |
569 | return afs_protocol_error(call, -EBADMSG, |
570 | afs_eproto_yvl_vlendpt4_len); | |
bf99a53c DH |
571 | bp += 3; |
572 | break; | |
573 | case YFS_ENDPOINT_IPV6: | |
574 | if (ntohl(bp[0]) != sizeof(__be32) * 5) | |
160cb957 DH |
575 | return afs_protocol_error(call, -EBADMSG, |
576 | afs_eproto_yvl_vlendpt6_len); | |
bf99a53c DH |
577 | bp += 6; |
578 | break; | |
579 | default: | |
160cb957 DH |
580 | return afs_protocol_error(call, -EBADMSG, |
581 | afs_eproto_yvl_vlendpt_type); | |
bf99a53c DH |
582 | } |
583 | ||
584 | /* Got either the type of the next entry or the count of | |
585 | * volEndpoints if no more fsEndpoints. | |
586 | */ | |
bf99a53c | 587 | call->count--; |
12bdcf33 DH |
588 | if (call->count > 0) |
589 | goto next_volendpoint; | |
bf99a53c DH |
590 | |
591 | end: | |
12bdcf33 | 592 | afs_extract_discard(call, 0); |
bf99a53c DH |
593 | call->unmarshall = 5; |
594 | ||
e690c9e3 | 595 | /* Fall through - Done */ |
bf99a53c | 596 | case 5: |
12bdcf33 | 597 | ret = afs_extract_data(call, false); |
bf99a53c DH |
598 | if (ret < 0) |
599 | return ret; | |
600 | call->unmarshall = 6; | |
601 | ||
602 | case 6: | |
603 | break; | |
604 | } | |
605 | ||
bf99a53c DH |
606 | _leave(" = 0 [done]"); |
607 | return 0; | |
608 | } | |
609 | ||
610 | /* | |
611 | * YFSVL.GetEndpoints operation type. | |
612 | */ | |
613 | static const struct afs_call_type afs_YFSVLGetEndpoints = { | |
025db80c DH |
614 | .name = "YFSVL.GetEndpoints", |
615 | .op = afs_YFSVL_GetEndpoints, | |
bf99a53c DH |
616 | .deliver = afs_deliver_yfsvl_get_endpoints, |
617 | .destructor = afs_vl_get_addrs_u_destructor, | |
618 | }; | |
619 | ||
620 | /* | |
621 | * Dispatch an operation to get the addresses for a server, where the server is | |
622 | * nominated by UUID. | |
623 | */ | |
0a5143f2 | 624 | struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *vc, |
bf99a53c DH |
625 | const uuid_t *uuid) |
626 | { | |
627 | struct afs_call *call; | |
0a5143f2 | 628 | struct afs_net *net = vc->cell->net; |
bf99a53c DH |
629 | __be32 *bp; |
630 | ||
631 | _enter(""); | |
632 | ||
633 | call = afs_alloc_flat_call(net, &afs_YFSVLGetEndpoints, | |
634 | sizeof(__be32) * 2 + sizeof(*uuid), | |
635 | sizeof(struct in6_addr) + sizeof(__be32) * 3); | |
636 | if (!call) | |
637 | return ERR_PTR(-ENOMEM); | |
638 | ||
0a5143f2 | 639 | call->key = vc->key; |
ffba718e | 640 | call->ret_alist = NULL; |
94f699c9 | 641 | call->max_lifespan = AFS_VL_MAX_LIFESPAN; |
bf99a53c DH |
642 | |
643 | /* Marshall the parameters */ | |
644 | bp = call->request; | |
645 | *bp++ = htonl(YVLGETENDPOINTS); | |
646 | *bp++ = htonl(YFS_SERVER_UUID); | |
647 | memcpy(bp, uuid, sizeof(*uuid)); /* Type opr_uuid */ | |
648 | ||
025db80c | 649 | trace_afs_make_vl_call(call); |
0b9bf381 DH |
650 | afs_make_call(&vc->ac, call, GFP_KERNEL); |
651 | return (struct afs_addr_list *)afs_wait_for_call_to_complete(call, &vc->ac); | |
bf99a53c | 652 | } |