Commit | Line | Data |
---|---|---|
ec26815a | 1 | /* AFS Cache Manager Service |
1da177e4 LT |
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/module.h> | |
13 | #include <linux/init.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
1da177e4 | 15 | #include <linux/sched.h> |
08e0e7c8 | 16 | #include <linux/ip.h> |
1da177e4 | 17 | #include "internal.h" |
08e0e7c8 | 18 | #include "afs_cm.h" |
1da177e4 | 19 | |
d001648e DH |
20 | static int afs_deliver_cb_init_call_back_state(struct afs_call *); |
21 | static int afs_deliver_cb_init_call_back_state3(struct afs_call *); | |
22 | static int afs_deliver_cb_probe(struct afs_call *); | |
23 | static int afs_deliver_cb_callback(struct afs_call *); | |
24 | static int afs_deliver_cb_probe_uuid(struct afs_call *); | |
25 | static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *); | |
08e0e7c8 | 26 | static void afs_cm_destructor(struct afs_call *); |
341f741f DH |
27 | static void SRXAFSCB_CallBack(struct work_struct *); |
28 | static void SRXAFSCB_InitCallBackState(struct work_struct *); | |
29 | static void SRXAFSCB_Probe(struct work_struct *); | |
30 | static void SRXAFSCB_ProbeUuid(struct work_struct *); | |
31 | static void SRXAFSCB_TellMeAboutYourself(struct work_struct *); | |
1da177e4 | 32 | |
8e8d7f13 DH |
33 | #define CM_NAME(name) \ |
34 | const char afs_SRXCB##name##_name[] __tracepoint_string = \ | |
35 | "CB." #name | |
36 | ||
1da177e4 | 37 | /* |
08e0e7c8 | 38 | * CB.CallBack operation type |
1da177e4 | 39 | */ |
8e8d7f13 | 40 | static CM_NAME(CallBack); |
08e0e7c8 | 41 | static const struct afs_call_type afs_SRXCBCallBack = { |
8e8d7f13 | 42 | .name = afs_SRXCBCallBack_name, |
08e0e7c8 DH |
43 | .deliver = afs_deliver_cb_callback, |
44 | .abort_to_error = afs_abort_to_error, | |
45 | .destructor = afs_cm_destructor, | |
341f741f | 46 | .work = SRXAFSCB_CallBack, |
08e0e7c8 | 47 | }; |
1da177e4 | 48 | |
1da177e4 | 49 | /* |
08e0e7c8 | 50 | * CB.InitCallBackState operation type |
1da177e4 | 51 | */ |
8e8d7f13 | 52 | static CM_NAME(InitCallBackState); |
08e0e7c8 | 53 | static const struct afs_call_type afs_SRXCBInitCallBackState = { |
8e8d7f13 | 54 | .name = afs_SRXCBInitCallBackState_name, |
08e0e7c8 DH |
55 | .deliver = afs_deliver_cb_init_call_back_state, |
56 | .abort_to_error = afs_abort_to_error, | |
57 | .destructor = afs_cm_destructor, | |
341f741f | 58 | .work = SRXAFSCB_InitCallBackState, |
08e0e7c8 | 59 | }; |
1da177e4 | 60 | |
c35eccb1 DH |
61 | /* |
62 | * CB.InitCallBackState3 operation type | |
63 | */ | |
8e8d7f13 | 64 | static CM_NAME(InitCallBackState3); |
c35eccb1 | 65 | static const struct afs_call_type afs_SRXCBInitCallBackState3 = { |
8e8d7f13 | 66 | .name = afs_SRXCBInitCallBackState3_name, |
c35eccb1 DH |
67 | .deliver = afs_deliver_cb_init_call_back_state3, |
68 | .abort_to_error = afs_abort_to_error, | |
69 | .destructor = afs_cm_destructor, | |
341f741f | 70 | .work = SRXAFSCB_InitCallBackState, |
c35eccb1 DH |
71 | }; |
72 | ||
1da177e4 | 73 | /* |
08e0e7c8 | 74 | * CB.Probe operation type |
1da177e4 | 75 | */ |
8e8d7f13 | 76 | static CM_NAME(Probe); |
08e0e7c8 | 77 | static const struct afs_call_type afs_SRXCBProbe = { |
8e8d7f13 | 78 | .name = afs_SRXCBProbe_name, |
08e0e7c8 DH |
79 | .deliver = afs_deliver_cb_probe, |
80 | .abort_to_error = afs_abort_to_error, | |
81 | .destructor = afs_cm_destructor, | |
341f741f | 82 | .work = SRXAFSCB_Probe, |
08e0e7c8 | 83 | }; |
1da177e4 | 84 | |
9396d496 DH |
85 | /* |
86 | * CB.ProbeUuid operation type | |
87 | */ | |
8e8d7f13 | 88 | static CM_NAME(ProbeUuid); |
9396d496 | 89 | static const struct afs_call_type afs_SRXCBProbeUuid = { |
8e8d7f13 | 90 | .name = afs_SRXCBProbeUuid_name, |
9396d496 DH |
91 | .deliver = afs_deliver_cb_probe_uuid, |
92 | .abort_to_error = afs_abort_to_error, | |
93 | .destructor = afs_cm_destructor, | |
341f741f | 94 | .work = SRXAFSCB_ProbeUuid, |
9396d496 DH |
95 | }; |
96 | ||
b908fe6b | 97 | /* |
7c80bcce | 98 | * CB.TellMeAboutYourself operation type |
b908fe6b | 99 | */ |
8e8d7f13 | 100 | static CM_NAME(TellMeAboutYourself); |
7c80bcce | 101 | static const struct afs_call_type afs_SRXCBTellMeAboutYourself = { |
8e8d7f13 | 102 | .name = afs_SRXCBTellMeAboutYourself_name, |
7c80bcce | 103 | .deliver = afs_deliver_cb_tell_me_about_yourself, |
b908fe6b DH |
104 | .abort_to_error = afs_abort_to_error, |
105 | .destructor = afs_cm_destructor, | |
341f741f | 106 | .work = SRXAFSCB_TellMeAboutYourself, |
b908fe6b DH |
107 | }; |
108 | ||
1da177e4 | 109 | /* |
08e0e7c8 DH |
110 | * route an incoming cache manager call |
111 | * - return T if supported, F if not | |
1da177e4 | 112 | */ |
08e0e7c8 | 113 | bool afs_cm_incoming_call(struct afs_call *call) |
1da177e4 | 114 | { |
50a2c953 | 115 | _enter("{CB.OP %u}", call->operation_ID); |
08e0e7c8 | 116 | |
50a2c953 | 117 | switch (call->operation_ID) { |
08e0e7c8 DH |
118 | case CBCallBack: |
119 | call->type = &afs_SRXCBCallBack; | |
120 | return true; | |
121 | case CBInitCallBackState: | |
122 | call->type = &afs_SRXCBInitCallBackState; | |
123 | return true; | |
c35eccb1 DH |
124 | case CBInitCallBackState3: |
125 | call->type = &afs_SRXCBInitCallBackState3; | |
126 | return true; | |
08e0e7c8 DH |
127 | case CBProbe: |
128 | call->type = &afs_SRXCBProbe; | |
129 | return true; | |
80e642c0 DH |
130 | case CBProbeUuid: |
131 | call->type = &afs_SRXCBProbeUuid; | |
132 | return true; | |
7c80bcce DH |
133 | case CBTellMeAboutYourself: |
134 | call->type = &afs_SRXCBTellMeAboutYourself; | |
b908fe6b | 135 | return true; |
08e0e7c8 DH |
136 | default: |
137 | return false; | |
1da177e4 | 138 | } |
ec26815a | 139 | } |
1da177e4 | 140 | |
1da177e4 | 141 | /* |
08e0e7c8 | 142 | * clean up a cache manager call |
1da177e4 | 143 | */ |
08e0e7c8 | 144 | static void afs_cm_destructor(struct afs_call *call) |
1da177e4 | 145 | { |
08e0e7c8 DH |
146 | _enter(""); |
147 | ||
6c67c7c3 DH |
148 | /* Break the callbacks here so that we do it after the final ACK is |
149 | * received. The step number here must match the final number in | |
150 | * afs_deliver_cb_callback(). | |
151 | */ | |
d001648e | 152 | if (call->unmarshall == 5) { |
6c67c7c3 DH |
153 | ASSERT(call->server && call->count && call->request); |
154 | afs_break_callbacks(call->server, call->count, call->request); | |
155 | } | |
156 | ||
08e0e7c8 DH |
157 | afs_put_server(call->server); |
158 | call->server = NULL; | |
159 | kfree(call->buffer); | |
160 | call->buffer = NULL; | |
ec26815a | 161 | } |
1da177e4 | 162 | |
1da177e4 | 163 | /* |
08e0e7c8 | 164 | * allow the fileserver to see if the cache manager is still alive |
1da177e4 | 165 | */ |
08e0e7c8 | 166 | static void SRXAFSCB_CallBack(struct work_struct *work) |
1da177e4 | 167 | { |
08e0e7c8 | 168 | struct afs_call *call = container_of(work, struct afs_call, work); |
1da177e4 | 169 | |
08e0e7c8 | 170 | _enter(""); |
1da177e4 | 171 | |
08e0e7c8 DH |
172 | /* be sure to send the reply *before* attempting to spam the AFS server |
173 | * with FSFetchStatus requests on the vnodes with broken callbacks lest | |
174 | * the AFS server get into a vicious cycle of trying to break further | |
175 | * callbacks because it hadn't received completion of the CBCallBack op | |
176 | * yet */ | |
177 | afs_send_empty_reply(call); | |
1da177e4 | 178 | |
08e0e7c8 | 179 | afs_break_callbacks(call->server, call->count, call->request); |
341f741f | 180 | afs_put_call(call); |
08e0e7c8 | 181 | _leave(""); |
ec26815a | 182 | } |
1da177e4 | 183 | |
1da177e4 | 184 | /* |
08e0e7c8 | 185 | * deliver request data to a CB.CallBack call |
1da177e4 | 186 | */ |
d001648e | 187 | static int afs_deliver_cb_callback(struct afs_call *call) |
1da177e4 | 188 | { |
8324f0bc | 189 | struct sockaddr_rxrpc srx; |
08e0e7c8 DH |
190 | struct afs_callback *cb; |
191 | struct afs_server *server; | |
08e0e7c8 | 192 | __be32 *bp; |
08e0e7c8 DH |
193 | int ret, loop; |
194 | ||
d001648e | 195 | _enter("{%u}", call->unmarshall); |
08e0e7c8 DH |
196 | |
197 | switch (call->unmarshall) { | |
198 | case 0: | |
8324f0bc | 199 | rxrpc_kernel_get_peer(afs_socket, call->rxcall, &srx); |
08e0e7c8 DH |
200 | call->offset = 0; |
201 | call->unmarshall++; | |
202 | ||
203 | /* extract the FID array and its count in two steps */ | |
204 | case 1: | |
205 | _debug("extract FID count"); | |
d001648e | 206 | ret = afs_extract_data(call, &call->tmp, 4, true); |
372ee163 DH |
207 | if (ret < 0) |
208 | return ret; | |
1da177e4 | 209 | |
08e0e7c8 DH |
210 | call->count = ntohl(call->tmp); |
211 | _debug("FID count: %u", call->count); | |
212 | if (call->count > AFSCBMAX) | |
213 | return -EBADMSG; | |
214 | ||
215 | call->buffer = kmalloc(call->count * 3 * 4, GFP_KERNEL); | |
216 | if (!call->buffer) | |
217 | return -ENOMEM; | |
218 | call->offset = 0; | |
219 | call->unmarshall++; | |
220 | ||
221 | case 2: | |
222 | _debug("extract FID array"); | |
d001648e DH |
223 | ret = afs_extract_data(call, call->buffer, |
224 | call->count * 3 * 4, true); | |
372ee163 DH |
225 | if (ret < 0) |
226 | return ret; | |
1da177e4 | 227 | |
08e0e7c8 DH |
228 | _debug("unmarshall FID array"); |
229 | call->request = kcalloc(call->count, | |
230 | sizeof(struct afs_callback), | |
231 | GFP_KERNEL); | |
232 | if (!call->request) | |
233 | return -ENOMEM; | |
234 | ||
235 | cb = call->request; | |
236 | bp = call->buffer; | |
237 | for (loop = call->count; loop > 0; loop--, cb++) { | |
238 | cb->fid.vid = ntohl(*bp++); | |
239 | cb->fid.vnode = ntohl(*bp++); | |
240 | cb->fid.unique = ntohl(*bp++); | |
241 | cb->type = AFSCM_CB_UNTYPED; | |
1da177e4 LT |
242 | } |
243 | ||
08e0e7c8 DH |
244 | call->offset = 0; |
245 | call->unmarshall++; | |
246 | ||
247 | /* extract the callback array and its count in two steps */ | |
248 | case 3: | |
249 | _debug("extract CB count"); | |
d001648e | 250 | ret = afs_extract_data(call, &call->tmp, 4, true); |
372ee163 DH |
251 | if (ret < 0) |
252 | return ret; | |
1da177e4 | 253 | |
bcd89270 MD |
254 | call->count2 = ntohl(call->tmp); |
255 | _debug("CB count: %u", call->count2); | |
256 | if (call->count2 != call->count && call->count2 != 0) | |
08e0e7c8 DH |
257 | return -EBADMSG; |
258 | call->offset = 0; | |
259 | call->unmarshall++; | |
08e0e7c8 DH |
260 | |
261 | case 4: | |
262 | _debug("extract CB array"); | |
d001648e | 263 | ret = afs_extract_data(call, call->buffer, |
bcd89270 | 264 | call->count2 * 3 * 4, false); |
372ee163 DH |
265 | if (ret < 0) |
266 | return ret; | |
1da177e4 | 267 | |
08e0e7c8 DH |
268 | _debug("unmarshall CB array"); |
269 | cb = call->request; | |
270 | bp = call->buffer; | |
bcd89270 | 271 | for (loop = call->count2; loop > 0; loop--, cb++) { |
08e0e7c8 DH |
272 | cb->version = ntohl(*bp++); |
273 | cb->expiry = ntohl(*bp++); | |
274 | cb->type = ntohl(*bp++); | |
275 | } | |
1da177e4 | 276 | |
08e0e7c8 DH |
277 | call->offset = 0; |
278 | call->unmarshall++; | |
1da177e4 | 279 | |
6c67c7c3 DH |
280 | /* Record that the message was unmarshalled successfully so |
281 | * that the call destructor can know do the callback breaking | |
282 | * work, even if the final ACK isn't received. | |
283 | * | |
284 | * If the step number changes, then afs_cm_destructor() must be | |
285 | * updated also. | |
286 | */ | |
287 | call->unmarshall++; | |
d001648e | 288 | case 5: |
1da177e4 LT |
289 | break; |
290 | } | |
291 | ||
08e0e7c8 | 292 | call->state = AFS_CALL_REPLYING; |
1da177e4 | 293 | |
08e0e7c8 DH |
294 | /* we'll need the file server record as that tells us which set of |
295 | * vnodes to operate upon */ | |
8324f0bc | 296 | server = afs_find_server(&srx); |
08e0e7c8 DH |
297 | if (!server) |
298 | return -ENOTCONN; | |
299 | call->server = server; | |
300 | ||
341f741f | 301 | return afs_queue_call_work(call); |
ec26815a | 302 | } |
1da177e4 | 303 | |
1da177e4 | 304 | /* |
08e0e7c8 | 305 | * allow the fileserver to request callback state (re-)initialisation |
1da177e4 | 306 | */ |
08e0e7c8 | 307 | static void SRXAFSCB_InitCallBackState(struct work_struct *work) |
1da177e4 | 308 | { |
08e0e7c8 | 309 | struct afs_call *call = container_of(work, struct afs_call, work); |
1da177e4 | 310 | |
08e0e7c8 | 311 | _enter("{%p}", call->server); |
1da177e4 | 312 | |
08e0e7c8 DH |
313 | afs_init_callback_state(call->server); |
314 | afs_send_empty_reply(call); | |
341f741f | 315 | afs_put_call(call); |
08e0e7c8 | 316 | _leave(""); |
ec26815a | 317 | } |
1da177e4 | 318 | |
1da177e4 | 319 | /* |
08e0e7c8 | 320 | * deliver request data to a CB.InitCallBackState call |
1da177e4 | 321 | */ |
d001648e | 322 | static int afs_deliver_cb_init_call_back_state(struct afs_call *call) |
1da177e4 | 323 | { |
8324f0bc | 324 | struct sockaddr_rxrpc srx; |
1da177e4 | 325 | struct afs_server *server; |
372ee163 | 326 | int ret; |
1da177e4 | 327 | |
d001648e | 328 | _enter(""); |
1da177e4 | 329 | |
8324f0bc DH |
330 | rxrpc_kernel_get_peer(afs_socket, call->rxcall, &srx); |
331 | ||
d001648e | 332 | ret = afs_extract_data(call, NULL, 0, false); |
372ee163 DH |
333 | if (ret < 0) |
334 | return ret; | |
1da177e4 | 335 | |
08e0e7c8 DH |
336 | /* no unmarshalling required */ |
337 | call->state = AFS_CALL_REPLYING; | |
1da177e4 | 338 | |
08e0e7c8 DH |
339 | /* we'll need the file server record as that tells us which set of |
340 | * vnodes to operate upon */ | |
8324f0bc | 341 | server = afs_find_server(&srx); |
08e0e7c8 DH |
342 | if (!server) |
343 | return -ENOTCONN; | |
344 | call->server = server; | |
1da177e4 | 345 | |
341f741f | 346 | return afs_queue_call_work(call); |
08e0e7c8 | 347 | } |
1da177e4 | 348 | |
c35eccb1 DH |
349 | /* |
350 | * deliver request data to a CB.InitCallBackState3 call | |
351 | */ | |
d001648e | 352 | static int afs_deliver_cb_init_call_back_state3(struct afs_call *call) |
c35eccb1 | 353 | { |
8324f0bc | 354 | struct sockaddr_rxrpc srx; |
c35eccb1 | 355 | struct afs_server *server; |
41bb26f8 | 356 | struct afs_uuid *r; |
d001648e DH |
357 | unsigned loop; |
358 | __be32 *b; | |
359 | int ret; | |
c35eccb1 | 360 | |
d001648e | 361 | _enter(""); |
c35eccb1 | 362 | |
8324f0bc DH |
363 | rxrpc_kernel_get_peer(afs_socket, call->rxcall, &srx); |
364 | ||
d001648e DH |
365 | _enter("{%u}", call->unmarshall); |
366 | ||
367 | switch (call->unmarshall) { | |
368 | case 0: | |
369 | call->offset = 0; | |
370 | call->buffer = kmalloc(11 * sizeof(__be32), GFP_KERNEL); | |
371 | if (!call->buffer) | |
372 | return -ENOMEM; | |
373 | call->unmarshall++; | |
374 | ||
375 | case 1: | |
376 | _debug("extract UUID"); | |
377 | ret = afs_extract_data(call, call->buffer, | |
378 | 11 * sizeof(__be32), false); | |
379 | switch (ret) { | |
380 | case 0: break; | |
381 | case -EAGAIN: return 0; | |
382 | default: return ret; | |
383 | } | |
384 | ||
385 | _debug("unmarshall UUID"); | |
41bb26f8 | 386 | call->request = kmalloc(sizeof(struct afs_uuid), GFP_KERNEL); |
d001648e DH |
387 | if (!call->request) |
388 | return -ENOMEM; | |
389 | ||
390 | b = call->buffer; | |
391 | r = call->request; | |
ff548773 DH |
392 | r->time_low = b[0]; |
393 | r->time_mid = htons(ntohl(b[1])); | |
394 | r->time_hi_and_version = htons(ntohl(b[2])); | |
d001648e DH |
395 | r->clock_seq_hi_and_reserved = ntohl(b[3]); |
396 | r->clock_seq_low = ntohl(b[4]); | |
397 | ||
398 | for (loop = 0; loop < 6; loop++) | |
399 | r->node[loop] = ntohl(b[loop + 5]); | |
400 | ||
401 | call->offset = 0; | |
402 | call->unmarshall++; | |
403 | ||
404 | case 2: | |
405 | break; | |
406 | } | |
c35eccb1 DH |
407 | |
408 | /* no unmarshalling required */ | |
409 | call->state = AFS_CALL_REPLYING; | |
410 | ||
411 | /* we'll need the file server record as that tells us which set of | |
412 | * vnodes to operate upon */ | |
8324f0bc | 413 | server = afs_find_server(&srx); |
c35eccb1 DH |
414 | if (!server) |
415 | return -ENOTCONN; | |
416 | call->server = server; | |
417 | ||
341f741f | 418 | return afs_queue_call_work(call); |
c35eccb1 DH |
419 | } |
420 | ||
08e0e7c8 DH |
421 | /* |
422 | * allow the fileserver to see if the cache manager is still alive | |
423 | */ | |
424 | static void SRXAFSCB_Probe(struct work_struct *work) | |
425 | { | |
426 | struct afs_call *call = container_of(work, struct afs_call, work); | |
1da177e4 | 427 | |
08e0e7c8 DH |
428 | _enter(""); |
429 | afs_send_empty_reply(call); | |
341f741f | 430 | afs_put_call(call); |
08e0e7c8 DH |
431 | _leave(""); |
432 | } | |
1da177e4 | 433 | |
08e0e7c8 DH |
434 | /* |
435 | * deliver request data to a CB.Probe call | |
436 | */ | |
d001648e | 437 | static int afs_deliver_cb_probe(struct afs_call *call) |
08e0e7c8 | 438 | { |
372ee163 DH |
439 | int ret; |
440 | ||
d001648e | 441 | _enter(""); |
1da177e4 | 442 | |
d001648e | 443 | ret = afs_extract_data(call, NULL, 0, false); |
372ee163 DH |
444 | if (ret < 0) |
445 | return ret; | |
1da177e4 | 446 | |
08e0e7c8 DH |
447 | /* no unmarshalling required */ |
448 | call->state = AFS_CALL_REPLYING; | |
1da177e4 | 449 | |
341f741f | 450 | return afs_queue_call_work(call); |
ec26815a | 451 | } |
b908fe6b | 452 | |
9396d496 DH |
453 | /* |
454 | * allow the fileserver to quickly find out if the fileserver has been rebooted | |
455 | */ | |
456 | static void SRXAFSCB_ProbeUuid(struct work_struct *work) | |
457 | { | |
458 | struct afs_call *call = container_of(work, struct afs_call, work); | |
41bb26f8 | 459 | struct afs_uuid *r = call->request; |
9396d496 DH |
460 | |
461 | struct { | |
462 | __be32 match; | |
463 | } reply; | |
464 | ||
465 | _enter(""); | |
466 | ||
9396d496 DH |
467 | if (memcmp(r, &afs_uuid, sizeof(afs_uuid)) == 0) |
468 | reply.match = htonl(0); | |
469 | else | |
470 | reply.match = htonl(1); | |
471 | ||
472 | afs_send_simple_reply(call, &reply, sizeof(reply)); | |
341f741f | 473 | afs_put_call(call); |
9396d496 DH |
474 | _leave(""); |
475 | } | |
476 | ||
477 | /* | |
478 | * deliver request data to a CB.ProbeUuid call | |
479 | */ | |
d001648e | 480 | static int afs_deliver_cb_probe_uuid(struct afs_call *call) |
9396d496 | 481 | { |
41bb26f8 | 482 | struct afs_uuid *r; |
9396d496 DH |
483 | unsigned loop; |
484 | __be32 *b; | |
485 | int ret; | |
486 | ||
d001648e | 487 | _enter("{%u}", call->unmarshall); |
9396d496 DH |
488 | |
489 | switch (call->unmarshall) { | |
490 | case 0: | |
491 | call->offset = 0; | |
492 | call->buffer = kmalloc(11 * sizeof(__be32), GFP_KERNEL); | |
493 | if (!call->buffer) | |
494 | return -ENOMEM; | |
495 | call->unmarshall++; | |
496 | ||
497 | case 1: | |
498 | _debug("extract UUID"); | |
d001648e DH |
499 | ret = afs_extract_data(call, call->buffer, |
500 | 11 * sizeof(__be32), false); | |
9396d496 DH |
501 | switch (ret) { |
502 | case 0: break; | |
503 | case -EAGAIN: return 0; | |
504 | default: return ret; | |
505 | } | |
506 | ||
507 | _debug("unmarshall UUID"); | |
41bb26f8 | 508 | call->request = kmalloc(sizeof(struct afs_uuid), GFP_KERNEL); |
9396d496 DH |
509 | if (!call->request) |
510 | return -ENOMEM; | |
511 | ||
512 | b = call->buffer; | |
513 | r = call->request; | |
41bb26f8 CH |
514 | r->time_low = ntohl(b[0]); |
515 | r->time_mid = ntohl(b[1]); | |
516 | r->time_hi_and_version = ntohl(b[2]); | |
9396d496 DH |
517 | r->clock_seq_hi_and_reserved = ntohl(b[3]); |
518 | r->clock_seq_low = ntohl(b[4]); | |
519 | ||
520 | for (loop = 0; loop < 6; loop++) | |
521 | r->node[loop] = ntohl(b[loop + 5]); | |
522 | ||
523 | call->offset = 0; | |
524 | call->unmarshall++; | |
525 | ||
526 | case 2: | |
9396d496 DH |
527 | break; |
528 | } | |
529 | ||
9396d496 DH |
530 | call->state = AFS_CALL_REPLYING; |
531 | ||
341f741f | 532 | return afs_queue_call_work(call); |
9396d496 DH |
533 | } |
534 | ||
b908fe6b DH |
535 | /* |
536 | * allow the fileserver to ask about the cache manager's capabilities | |
537 | */ | |
7c80bcce | 538 | static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work) |
b908fe6b DH |
539 | { |
540 | struct afs_interface *ifs; | |
541 | struct afs_call *call = container_of(work, struct afs_call, work); | |
542 | int loop, nifs; | |
543 | ||
544 | struct { | |
545 | struct /* InterfaceAddr */ { | |
546 | __be32 nifs; | |
547 | __be32 uuid[11]; | |
548 | __be32 ifaddr[32]; | |
549 | __be32 netmask[32]; | |
550 | __be32 mtu[32]; | |
551 | } ia; | |
552 | struct /* Capabilities */ { | |
553 | __be32 capcount; | |
554 | __be32 caps[1]; | |
555 | } cap; | |
556 | } reply; | |
557 | ||
558 | _enter(""); | |
559 | ||
560 | nifs = 0; | |
561 | ifs = kcalloc(32, sizeof(*ifs), GFP_KERNEL); | |
562 | if (ifs) { | |
563 | nifs = afs_get_ipv4_interfaces(ifs, 32, false); | |
564 | if (nifs < 0) { | |
565 | kfree(ifs); | |
566 | ifs = NULL; | |
567 | nifs = 0; | |
568 | } | |
569 | } | |
570 | ||
571 | memset(&reply, 0, sizeof(reply)); | |
572 | reply.ia.nifs = htonl(nifs); | |
573 | ||
ff548773 DH |
574 | reply.ia.uuid[0] = afs_uuid.time_low; |
575 | reply.ia.uuid[1] = htonl(ntohs(afs_uuid.time_mid)); | |
576 | reply.ia.uuid[2] = htonl(ntohs(afs_uuid.time_hi_and_version)); | |
b908fe6b DH |
577 | reply.ia.uuid[3] = htonl((s8) afs_uuid.clock_seq_hi_and_reserved); |
578 | reply.ia.uuid[4] = htonl((s8) afs_uuid.clock_seq_low); | |
579 | for (loop = 0; loop < 6; loop++) | |
580 | reply.ia.uuid[loop + 5] = htonl((s8) afs_uuid.node[loop]); | |
581 | ||
582 | if (ifs) { | |
583 | for (loop = 0; loop < nifs; loop++) { | |
584 | reply.ia.ifaddr[loop] = ifs[loop].address.s_addr; | |
585 | reply.ia.netmask[loop] = ifs[loop].netmask.s_addr; | |
586 | reply.ia.mtu[loop] = htonl(ifs[loop].mtu); | |
587 | } | |
5b35fad9 | 588 | kfree(ifs); |
b908fe6b DH |
589 | } |
590 | ||
591 | reply.cap.capcount = htonl(1); | |
592 | reply.cap.caps[0] = htonl(AFS_CAP_ERROR_TRANSLATION); | |
593 | afs_send_simple_reply(call, &reply, sizeof(reply)); | |
341f741f | 594 | afs_put_call(call); |
b908fe6b DH |
595 | _leave(""); |
596 | } | |
597 | ||
598 | /* | |
7c80bcce | 599 | * deliver request data to a CB.TellMeAboutYourself call |
b908fe6b | 600 | */ |
d001648e | 601 | static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *call) |
b908fe6b | 602 | { |
372ee163 DH |
603 | int ret; |
604 | ||
d001648e | 605 | _enter(""); |
b908fe6b | 606 | |
d001648e | 607 | ret = afs_extract_data(call, NULL, 0, false); |
372ee163 DH |
608 | if (ret < 0) |
609 | return ret; | |
b908fe6b DH |
610 | |
611 | /* no unmarshalling required */ | |
612 | call->state = AFS_CALL_REPLYING; | |
613 | ||
341f741f | 614 | return afs_queue_call_work(call); |
b908fe6b | 615 | } |