blob: a3bcec75c54aa2302728edddfd93de15f4ac513c [file] [log] [blame]
David Howellsec268152007-04-26 15:49:28 -07001/* AFS Cache Manager Service
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 *
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/sched.h>
David Howells08e0e7c2007-04-26 15:55:03 -070016#include <linux/ip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include "internal.h"
David Howells08e0e7c2007-04-26 15:55:03 -070018#include "afs_cm.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
Adrian Bunkc1206a22007-10-16 23:26:41 -070020#if 0
David Howells08e0e7c2007-04-26 15:55:03 -070021struct workqueue_struct *afs_cm_workqueue;
Adrian Bunkc1206a22007-10-16 23:26:41 -070022#endif /* 0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
David Howells08e0e7c2007-04-26 15:55:03 -070024static int afs_deliver_cb_init_call_back_state(struct afs_call *,
25 struct sk_buff *, bool);
David Howellsc35eccb2007-04-26 15:58:49 -070026static int afs_deliver_cb_init_call_back_state3(struct afs_call *,
27 struct sk_buff *, bool);
David Howells08e0e7c2007-04-26 15:55:03 -070028static int afs_deliver_cb_probe(struct afs_call *, struct sk_buff *, bool);
29static int afs_deliver_cb_callback(struct afs_call *, struct sk_buff *, bool);
David Howells9396d492008-04-29 01:03:22 -070030static int afs_deliver_cb_probe_uuid(struct afs_call *, struct sk_buff *, bool);
David Howells7c80bcc2008-04-29 01:03:21 -070031static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *,
32 struct sk_buff *, bool);
David Howells08e0e7c2007-04-26 15:55:03 -070033static void afs_cm_destructor(struct afs_call *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
David Howells08e0e7c2007-04-26 15:55:03 -070035/*
36 * CB.CallBack operation type
37 */
38static const struct afs_call_type afs_SRXCBCallBack = {
David Howells00d3b7a2007-04-26 15:57:07 -070039 .name = "CB.CallBack",
David Howells08e0e7c2007-04-26 15:55:03 -070040 .deliver = afs_deliver_cb_callback,
41 .abort_to_error = afs_abort_to_error,
42 .destructor = afs_cm_destructor,
Linus Torvalds1da177e2005-04-16 15:20:36 -070043};
44
David Howells08e0e7c2007-04-26 15:55:03 -070045/*
46 * CB.InitCallBackState operation type
47 */
48static const struct afs_call_type afs_SRXCBInitCallBackState = {
David Howells00d3b7a2007-04-26 15:57:07 -070049 .name = "CB.InitCallBackState",
David Howells08e0e7c2007-04-26 15:55:03 -070050 .deliver = afs_deliver_cb_init_call_back_state,
51 .abort_to_error = afs_abort_to_error,
52 .destructor = afs_cm_destructor,
Linus Torvalds1da177e2005-04-16 15:20:36 -070053};
54
David Howells08e0e7c2007-04-26 15:55:03 -070055/*
David Howellsc35eccb2007-04-26 15:58:49 -070056 * CB.InitCallBackState3 operation type
57 */
58static const struct afs_call_type afs_SRXCBInitCallBackState3 = {
59 .name = "CB.InitCallBackState3",
60 .deliver = afs_deliver_cb_init_call_back_state3,
61 .abort_to_error = afs_abort_to_error,
62 .destructor = afs_cm_destructor,
63};
64
65/*
David Howells08e0e7c2007-04-26 15:55:03 -070066 * CB.Probe operation type
67 */
68static const struct afs_call_type afs_SRXCBProbe = {
David Howells00d3b7a2007-04-26 15:57:07 -070069 .name = "CB.Probe",
David Howells08e0e7c2007-04-26 15:55:03 -070070 .deliver = afs_deliver_cb_probe,
71 .abort_to_error = afs_abort_to_error,
72 .destructor = afs_cm_destructor,
73};
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Linus Torvalds1da177e2005-04-16 15:20:36 -070075/*
David Howells9396d492008-04-29 01:03:22 -070076 * CB.ProbeUuid operation type
77 */
78static const struct afs_call_type afs_SRXCBProbeUuid = {
79 .name = "CB.ProbeUuid",
80 .deliver = afs_deliver_cb_probe_uuid,
81 .abort_to_error = afs_abort_to_error,
82 .destructor = afs_cm_destructor,
83};
84
85/*
David Howells7c80bcc2008-04-29 01:03:21 -070086 * CB.TellMeAboutYourself operation type
David Howellsb908fe62007-04-26 15:58:17 -070087 */
David Howells7c80bcc2008-04-29 01:03:21 -070088static const struct afs_call_type afs_SRXCBTellMeAboutYourself = {
89 .name = "CB.TellMeAboutYourself",
90 .deliver = afs_deliver_cb_tell_me_about_yourself,
David Howellsb908fe62007-04-26 15:58:17 -070091 .abort_to_error = afs_abort_to_error,
92 .destructor = afs_cm_destructor,
93};
94
95/*
David Howells08e0e7c2007-04-26 15:55:03 -070096 * route an incoming cache manager call
97 * - return T if supported, F if not
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 */
David Howells08e0e7c2007-04-26 15:55:03 -070099bool afs_cm_incoming_call(struct afs_call *call)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100{
David Howells08e0e7c2007-04-26 15:55:03 -0700101 u32 operation_id = ntohl(call->operation_ID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
David Howells08e0e7c2007-04-26 15:55:03 -0700103 _enter("{CB.OP %u}", operation_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
David Howells08e0e7c2007-04-26 15:55:03 -0700105 switch (operation_id) {
106 case CBCallBack:
107 call->type = &afs_SRXCBCallBack;
108 return true;
109 case CBInitCallBackState:
110 call->type = &afs_SRXCBInitCallBackState;
111 return true;
David Howellsc35eccb2007-04-26 15:58:49 -0700112 case CBInitCallBackState3:
113 call->type = &afs_SRXCBInitCallBackState3;
114 return true;
David Howells08e0e7c2007-04-26 15:55:03 -0700115 case CBProbe:
116 call->type = &afs_SRXCBProbe;
117 return true;
David Howells7c80bcc2008-04-29 01:03:21 -0700118 case CBTellMeAboutYourself:
119 call->type = &afs_SRXCBTellMeAboutYourself;
David Howellsb908fe62007-04-26 15:58:17 -0700120 return true;
David Howells08e0e7c2007-04-26 15:55:03 -0700121 default:
122 return false;
123 }
David Howellsec268152007-04-26 15:49:28 -0700124}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126/*
David Howells08e0e7c2007-04-26 15:55:03 -0700127 * clean up a cache manager call
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 */
David Howells08e0e7c2007-04-26 15:55:03 -0700129static void afs_cm_destructor(struct afs_call *call)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130{
David Howells08e0e7c2007-04-26 15:55:03 -0700131 _enter("");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
David Howells08e0e7c2007-04-26 15:55:03 -0700133 afs_put_server(call->server);
134 call->server = NULL;
135 kfree(call->buffer);
136 call->buffer = NULL;
David Howellsec268152007-04-26 15:49:28 -0700137}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139/*
David Howells08e0e7c2007-04-26 15:55:03 -0700140 * allow the fileserver to see if the cache manager is still alive
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 */
David Howells08e0e7c2007-04-26 15:55:03 -0700142static void SRXAFSCB_CallBack(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143{
David Howells08e0e7c2007-04-26 15:55:03 -0700144 struct afs_call *call = container_of(work, struct afs_call, work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
David Howells08e0e7c2007-04-26 15:55:03 -0700146 _enter("");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
David Howells08e0e7c2007-04-26 15:55:03 -0700148 /* be sure to send the reply *before* attempting to spam the AFS server
149 * with FSFetchStatus requests on the vnodes with broken callbacks lest
150 * the AFS server get into a vicious cycle of trying to break further
151 * callbacks because it hadn't received completion of the CBCallBack op
152 * yet */
153 afs_send_empty_reply(call);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
David Howells08e0e7c2007-04-26 15:55:03 -0700155 afs_break_callbacks(call->server, call->count, call->request);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 _leave("");
David Howellsec268152007-04-26 15:49:28 -0700157}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159/*
David Howells08e0e7c2007-04-26 15:55:03 -0700160 * deliver request data to a CB.CallBack call
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 */
David Howells08e0e7c2007-04-26 15:55:03 -0700162static int afs_deliver_cb_callback(struct afs_call *call, struct sk_buff *skb,
163 bool last)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164{
David Howells08e0e7c2007-04-26 15:55:03 -0700165 struct afs_callback *cb;
166 struct afs_server *server;
167 struct in_addr addr;
168 __be32 *bp;
169 u32 tmp;
170 int ret, loop;
171
172 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
173
174 switch (call->unmarshall) {
175 case 0:
176 call->offset = 0;
177 call->unmarshall++;
178
179 /* extract the FID array and its count in two steps */
180 case 1:
181 _debug("extract FID count");
182 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
183 switch (ret) {
184 case 0: break;
185 case -EAGAIN: return 0;
186 default: return ret;
187 }
188
189 call->count = ntohl(call->tmp);
190 _debug("FID count: %u", call->count);
191 if (call->count > AFSCBMAX)
192 return -EBADMSG;
193
194 call->buffer = kmalloc(call->count * 3 * 4, GFP_KERNEL);
195 if (!call->buffer)
196 return -ENOMEM;
197 call->offset = 0;
198 call->unmarshall++;
199
200 case 2:
201 _debug("extract FID array");
202 ret = afs_extract_data(call, skb, last, call->buffer,
203 call->count * 3 * 4);
204 switch (ret) {
205 case 0: break;
206 case -EAGAIN: return 0;
207 default: return ret;
208 }
209
210 _debug("unmarshall FID array");
211 call->request = kcalloc(call->count,
212 sizeof(struct afs_callback),
213 GFP_KERNEL);
214 if (!call->request)
215 return -ENOMEM;
216
217 cb = call->request;
218 bp = call->buffer;
219 for (loop = call->count; loop > 0; loop--, cb++) {
220 cb->fid.vid = ntohl(*bp++);
221 cb->fid.vnode = ntohl(*bp++);
222 cb->fid.unique = ntohl(*bp++);
223 cb->type = AFSCM_CB_UNTYPED;
224 }
225
226 call->offset = 0;
227 call->unmarshall++;
228
229 /* extract the callback array and its count in two steps */
230 case 3:
231 _debug("extract CB count");
232 ret = afs_extract_data(call, skb, last, &call->tmp, 4);
233 switch (ret) {
234 case 0: break;
235 case -EAGAIN: return 0;
236 default: return ret;
237 }
238
239 tmp = ntohl(call->tmp);
240 _debug("CB count: %u", tmp);
241 if (tmp != call->count && tmp != 0)
242 return -EBADMSG;
243 call->offset = 0;
244 call->unmarshall++;
245 if (tmp == 0)
246 goto empty_cb_array;
247
248 case 4:
249 _debug("extract CB array");
250 ret = afs_extract_data(call, skb, last, call->request,
251 call->count * 3 * 4);
252 switch (ret) {
253 case 0: break;
254 case -EAGAIN: return 0;
255 default: return ret;
256 }
257
258 _debug("unmarshall CB array");
259 cb = call->request;
260 bp = call->buffer;
261 for (loop = call->count; loop > 0; loop--, cb++) {
262 cb->version = ntohl(*bp++);
263 cb->expiry = ntohl(*bp++);
264 cb->type = ntohl(*bp++);
265 }
266
267 empty_cb_array:
268 call->offset = 0;
269 call->unmarshall++;
270
271 case 5:
272 _debug("trailer");
273 if (skb->len != 0)
274 return -EBADMSG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 break;
276 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
David Howells08e0e7c2007-04-26 15:55:03 -0700278 if (!last)
279 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
David Howells08e0e7c2007-04-26 15:55:03 -0700281 call->state = AFS_CALL_REPLYING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
David Howells08e0e7c2007-04-26 15:55:03 -0700283 /* we'll need the file server record as that tells us which set of
284 * vnodes to operate upon */
285 memcpy(&addr, &ip_hdr(skb)->saddr, 4);
286 server = afs_find_server(&addr);
287 if (!server)
288 return -ENOTCONN;
289 call->server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
David Howells08e0e7c2007-04-26 15:55:03 -0700291 INIT_WORK(&call->work, SRXAFSCB_CallBack);
292 schedule_work(&call->work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 return 0;
David Howellsec268152007-04-26 15:49:28 -0700294}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296/*
David Howells08e0e7c2007-04-26 15:55:03 -0700297 * allow the fileserver to request callback state (re-)initialisation
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 */
David Howells08e0e7c2007-04-26 15:55:03 -0700299static void SRXAFSCB_InitCallBackState(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300{
David Howells08e0e7c2007-04-26 15:55:03 -0700301 struct afs_call *call = container_of(work, struct afs_call, work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302
David Howells08e0e7c2007-04-26 15:55:03 -0700303 _enter("{%p}", call->server);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
David Howells08e0e7c2007-04-26 15:55:03 -0700305 afs_init_callback_state(call->server);
306 afs_send_empty_reply(call);
307 _leave("");
David Howellsec268152007-04-26 15:49:28 -0700308}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310/*
David Howells08e0e7c2007-04-26 15:55:03 -0700311 * deliver request data to a CB.InitCallBackState call
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 */
David Howells08e0e7c2007-04-26 15:55:03 -0700313static int afs_deliver_cb_init_call_back_state(struct afs_call *call,
314 struct sk_buff *skb,
315 bool last)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316{
317 struct afs_server *server;
David Howells08e0e7c2007-04-26 15:55:03 -0700318 struct in_addr addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
David Howells08e0e7c2007-04-26 15:55:03 -0700320 _enter(",{%u},%d", skb->len, last);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
David Howells08e0e7c2007-04-26 15:55:03 -0700322 if (skb->len > 0)
323 return -EBADMSG;
324 if (!last)
325 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
David Howells08e0e7c2007-04-26 15:55:03 -0700327 /* no unmarshalling required */
328 call->state = AFS_CALL_REPLYING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
David Howells08e0e7c2007-04-26 15:55:03 -0700330 /* we'll need the file server record as that tells us which set of
331 * vnodes to operate upon */
332 memcpy(&addr, &ip_hdr(skb)->saddr, 4);
333 server = afs_find_server(&addr);
334 if (!server)
335 return -ENOTCONN;
336 call->server = server;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
David Howells08e0e7c2007-04-26 15:55:03 -0700338 INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
339 schedule_work(&call->work);
340 return 0;
David Howellsec268152007-04-26 15:49:28 -0700341}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343/*
David Howellsc35eccb2007-04-26 15:58:49 -0700344 * deliver request data to a CB.InitCallBackState3 call
345 */
346static int afs_deliver_cb_init_call_back_state3(struct afs_call *call,
347 struct sk_buff *skb,
348 bool last)
349{
350 struct afs_server *server;
351 struct in_addr addr;
352
353 _enter(",{%u},%d", skb->len, last);
354
355 if (!last)
356 return 0;
357
358 /* no unmarshalling required */
359 call->state = AFS_CALL_REPLYING;
360
361 /* we'll need the file server record as that tells us which set of
362 * vnodes to operate upon */
363 memcpy(&addr, &ip_hdr(skb)->saddr, 4);
364 server = afs_find_server(&addr);
365 if (!server)
366 return -ENOTCONN;
367 call->server = server;
368
369 INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
370 schedule_work(&call->work);
371 return 0;
372}
373
374/*
David Howells08e0e7c2007-04-26 15:55:03 -0700375 * allow the fileserver to see if the cache manager is still alive
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 */
David Howells08e0e7c2007-04-26 15:55:03 -0700377static void SRXAFSCB_Probe(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378{
David Howells08e0e7c2007-04-26 15:55:03 -0700379 struct afs_call *call = container_of(work, struct afs_call, work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
David Howells08e0e7c2007-04-26 15:55:03 -0700381 _enter("");
382 afs_send_empty_reply(call);
383 _leave("");
David Howellsec268152007-04-26 15:49:28 -0700384}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386/*
David Howells08e0e7c2007-04-26 15:55:03 -0700387 * deliver request data to a CB.Probe call
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 */
David Howells08e0e7c2007-04-26 15:55:03 -0700389static int afs_deliver_cb_probe(struct afs_call *call, struct sk_buff *skb,
390 bool last)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391{
David Howells08e0e7c2007-04-26 15:55:03 -0700392 _enter(",{%u},%d", skb->len, last);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
David Howells08e0e7c2007-04-26 15:55:03 -0700394 if (skb->len > 0)
395 return -EBADMSG;
396 if (!last)
397 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
David Howells08e0e7c2007-04-26 15:55:03 -0700399 /* no unmarshalling required */
400 call->state = AFS_CALL_REPLYING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
David Howells08e0e7c2007-04-26 15:55:03 -0700402 INIT_WORK(&call->work, SRXAFSCB_Probe);
403 schedule_work(&call->work);
404 return 0;
David Howellsec268152007-04-26 15:49:28 -0700405}
David Howellsb908fe62007-04-26 15:58:17 -0700406
407/*
David Howells9396d492008-04-29 01:03:22 -0700408 * allow the fileserver to quickly find out if the fileserver has been rebooted
409 */
410static void SRXAFSCB_ProbeUuid(struct work_struct *work)
411{
412 struct afs_call *call = container_of(work, struct afs_call, work);
413 struct afs_uuid *r = call->request;
414
415 struct {
416 __be32 match;
417 } reply;
418
419 _enter("");
420
421
422 if (memcmp(r, &afs_uuid, sizeof(afs_uuid)) == 0)
423 reply.match = htonl(0);
424 else
425 reply.match = htonl(1);
426
427 afs_send_simple_reply(call, &reply, sizeof(reply));
428 _leave("");
429}
430
431/*
432 * deliver request data to a CB.ProbeUuid call
433 */
434static int afs_deliver_cb_probe_uuid(struct afs_call *call, struct sk_buff *skb,
435 bool last)
436{
437 struct afs_uuid *r;
438 unsigned loop;
439 __be32 *b;
440 int ret;
441
442 _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
443
444 if (skb->len > 0)
445 return -EBADMSG;
446 if (!last)
447 return 0;
448
449 switch (call->unmarshall) {
450 case 0:
451 call->offset = 0;
452 call->buffer = kmalloc(11 * sizeof(__be32), GFP_KERNEL);
453 if (!call->buffer)
454 return -ENOMEM;
455 call->unmarshall++;
456
457 case 1:
458 _debug("extract UUID");
459 ret = afs_extract_data(call, skb, last, call->buffer,
460 11 * sizeof(__be32));
461 switch (ret) {
462 case 0: break;
463 case -EAGAIN: return 0;
464 default: return ret;
465 }
466
467 _debug("unmarshall UUID");
468 call->request = kmalloc(sizeof(struct afs_uuid), GFP_KERNEL);
469 if (!call->request)
470 return -ENOMEM;
471
472 b = call->buffer;
473 r = call->request;
474 r->time_low = ntohl(b[0]);
475 r->time_mid = ntohl(b[1]);
476 r->time_hi_and_version = ntohl(b[2]);
477 r->clock_seq_hi_and_reserved = ntohl(b[3]);
478 r->clock_seq_low = ntohl(b[4]);
479
480 for (loop = 0; loop < 6; loop++)
481 r->node[loop] = ntohl(b[loop + 5]);
482
483 call->offset = 0;
484 call->unmarshall++;
485
486 case 2:
487 _debug("trailer");
488 if (skb->len != 0)
489 return -EBADMSG;
490 break;
491 }
492
493 if (!last)
494 return 0;
495
496 call->state = AFS_CALL_REPLYING;
497
498 INIT_WORK(&call->work, SRXAFSCB_ProbeUuid);
499 schedule_work(&call->work);
500 return 0;
501}
502
503/*
David Howellsb908fe62007-04-26 15:58:17 -0700504 * allow the fileserver to ask about the cache manager's capabilities
505 */
David Howells7c80bcc2008-04-29 01:03:21 -0700506static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
David Howellsb908fe62007-04-26 15:58:17 -0700507{
508 struct afs_interface *ifs;
509 struct afs_call *call = container_of(work, struct afs_call, work);
510 int loop, nifs;
511
512 struct {
513 struct /* InterfaceAddr */ {
514 __be32 nifs;
515 __be32 uuid[11];
516 __be32 ifaddr[32];
517 __be32 netmask[32];
518 __be32 mtu[32];
519 } ia;
520 struct /* Capabilities */ {
521 __be32 capcount;
522 __be32 caps[1];
523 } cap;
524 } reply;
525
526 _enter("");
527
528 nifs = 0;
529 ifs = kcalloc(32, sizeof(*ifs), GFP_KERNEL);
530 if (ifs) {
531 nifs = afs_get_ipv4_interfaces(ifs, 32, false);
532 if (nifs < 0) {
533 kfree(ifs);
534 ifs = NULL;
535 nifs = 0;
536 }
537 }
538
539 memset(&reply, 0, sizeof(reply));
540 reply.ia.nifs = htonl(nifs);
541
542 reply.ia.uuid[0] = htonl(afs_uuid.time_low);
543 reply.ia.uuid[1] = htonl(afs_uuid.time_mid);
544 reply.ia.uuid[2] = htonl(afs_uuid.time_hi_and_version);
545 reply.ia.uuid[3] = htonl((s8) afs_uuid.clock_seq_hi_and_reserved);
546 reply.ia.uuid[4] = htonl((s8) afs_uuid.clock_seq_low);
547 for (loop = 0; loop < 6; loop++)
548 reply.ia.uuid[loop + 5] = htonl((s8) afs_uuid.node[loop]);
549
550 if (ifs) {
551 for (loop = 0; loop < nifs; loop++) {
552 reply.ia.ifaddr[loop] = ifs[loop].address.s_addr;
553 reply.ia.netmask[loop] = ifs[loop].netmask.s_addr;
554 reply.ia.mtu[loop] = htonl(ifs[loop].mtu);
555 }
Patrick McHardy5b35fad2007-05-03 03:27:39 -0700556 kfree(ifs);
David Howellsb908fe62007-04-26 15:58:17 -0700557 }
558
559 reply.cap.capcount = htonl(1);
560 reply.cap.caps[0] = htonl(AFS_CAP_ERROR_TRANSLATION);
561 afs_send_simple_reply(call, &reply, sizeof(reply));
562
563 _leave("");
564}
565
566/*
David Howells7c80bcc2008-04-29 01:03:21 -0700567 * deliver request data to a CB.TellMeAboutYourself call
David Howellsb908fe62007-04-26 15:58:17 -0700568 */
David Howells7c80bcc2008-04-29 01:03:21 -0700569static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *call,
570 struct sk_buff *skb, bool last)
David Howellsb908fe62007-04-26 15:58:17 -0700571{
572 _enter(",{%u},%d", skb->len, last);
573
574 if (skb->len > 0)
575 return -EBADMSG;
576 if (!last)
577 return 0;
578
579 /* no unmarshalling required */
580 call->state = AFS_CALL_REPLYING;
581
David Howells7c80bcc2008-04-29 01:03:21 -0700582 INIT_WORK(&call->work, SRXAFSCB_TellMeAboutYourself);
David Howellsb908fe62007-04-26 15:58:17 -0700583 schedule_work(&call->work);
584 return 0;
585}