1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* AFS File Server client stubs
3 *
4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8 #include <linux/init.h>
9 #include <linux/slab.h>
10 #include <linux/sched.h>
11 #include <linux/circ_buf.h>
12 #include <linux/iversion.h>
13 #include <linux/netfs.h>
14 #include "internal.h"
15 #include "afs_fs.h"
16 #include "xdr_fs.h"
17
18 /*
19 * decode an AFSFid block
20 */
xdr_decode_AFSFid(const __be32 ** _bp,struct afs_fid * fid)21 static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
22 {
23 const __be32 *bp = *_bp;
24
25 fid->vid = ntohl(*bp++);
26 fid->vnode = ntohl(*bp++);
27 fid->unique = ntohl(*bp++);
28 *_bp = bp;
29 }
30
31 /*
32 * Dump a bad file status record.
33 */
xdr_dump_bad(const __be32 * bp)34 static void xdr_dump_bad(const __be32 *bp)
35 {
36 __be32 x[4];
37 int i;
38
39 pr_notice("AFS XDR: Bad status record\n");
40 for (i = 0; i < 5 * 4 * 4; i += 16) {
41 memcpy(x, bp, 16);
42 bp += 4;
43 pr_notice("%03x: %08x %08x %08x %08x\n",
44 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
45 }
46
47 memcpy(x, bp, 4);
48 pr_notice("0x50: %08x\n", ntohl(x[0]));
49 }
50
51 /*
52 * decode an AFSFetchStatus block
53 */
xdr_decode_AFSFetchStatus(const __be32 ** _bp,struct afs_call * call,struct afs_status_cb * scb)54 static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
55 struct afs_call *call,
56 struct afs_status_cb *scb)
57 {
58 const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
59 struct afs_file_status *status = &scb->status;
60 bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus);
61 u64 data_version, size;
62 u32 type, abort_code;
63
64 abort_code = ntohl(xdr->abort_code);
65
66 if (xdr->if_version != htonl(AFS_FSTATUS_VERSION)) {
67 if (xdr->if_version == htonl(0) &&
68 abort_code != 0 &&
69 inline_error) {
70 /* The OpenAFS fileserver has a bug in FS.InlineBulkStatus
71 * whereby it doesn't set the interface version in the error
72 * case.
73 */
74 status->abort_code = abort_code;
75 scb->have_error = true;
76 goto advance;
77 }
78
79 pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
80 goto bad;
81 }
82
83 if (abort_code != 0 && inline_error) {
84 status->abort_code = abort_code;
85 scb->have_error = true;
86 goto advance;
87 }
88
89 type = ntohl(xdr->type);
90 switch (type) {
91 case AFS_FTYPE_FILE:
92 case AFS_FTYPE_DIR:
93 case AFS_FTYPE_SYMLINK:
94 status->type = type;
95 break;
96 default:
97 goto bad;
98 }
99
100 status->nlink = ntohl(xdr->nlink);
101 status->author = ntohl(xdr->author);
102 status->owner = ntohl(xdr->owner);
103 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
104 status->anon_access = ntohl(xdr->anon_access);
105 status->mode = ntohl(xdr->mode) & S_IALLUGO;
106 status->group = ntohl(xdr->group);
107 status->lock_count = ntohl(xdr->lock_count);
108
109 status->mtime_client.tv_sec = ntohl(xdr->mtime_client);
110 status->mtime_client.tv_nsec = 0;
111 status->mtime_server.tv_sec = ntohl(xdr->mtime_server);
112 status->mtime_server.tv_nsec = 0;
113
114 size = (u64)ntohl(xdr->size_lo);
115 size |= (u64)ntohl(xdr->size_hi) << 32;
116 status->size = size;
117
118 data_version = (u64)ntohl(xdr->data_version_lo);
119 data_version |= (u64)ntohl(xdr->data_version_hi) << 32;
120 status->data_version = data_version;
121 scb->have_status = true;
122 advance:
123 *_bp = (const void *)*_bp + sizeof(*xdr);
124 return;
125
126 bad:
127 xdr_dump_bad(*_bp);
128 afs_protocol_error(call, afs_eproto_bad_status);
129 goto advance;
130 }
131
xdr_decode_expiry(struct afs_call * call,u32 expiry)132 static time64_t xdr_decode_expiry(struct afs_call *call, u32 expiry)
133 {
134 return ktime_divns(call->issue_time, NSEC_PER_SEC) + expiry;
135 }
136
xdr_decode_AFSCallBack(const __be32 ** _bp,struct afs_call * call,struct afs_status_cb * scb)137 static void xdr_decode_AFSCallBack(const __be32 **_bp,
138 struct afs_call *call,
139 struct afs_status_cb *scb)
140 {
141 struct afs_callback *cb = &scb->callback;
142 const __be32 *bp = *_bp;
143
144 bp++; /* version */
145 cb->expires_at = xdr_decode_expiry(call, ntohl(*bp++));
146 bp++; /* type */
147 scb->have_cb = true;
148 *_bp = bp;
149 }
150
151 /*
152 * decode an AFSVolSync block
153 */
xdr_decode_AFSVolSync(const __be32 ** _bp,struct afs_volsync * volsync)154 static void xdr_decode_AFSVolSync(const __be32 **_bp,
155 struct afs_volsync *volsync)
156 {
157 const __be32 *bp = *_bp;
158 u32 creation;
159
160 creation = ntohl(*bp++);
161 bp++; /* spare2 */
162 bp++; /* spare3 */
163 bp++; /* spare4 */
164 bp++; /* spare5 */
165 bp++; /* spare6 */
166 *_bp = bp;
167
168 if (volsync)
169 volsync->creation = creation;
170 }
171
172 /*
173 * encode the requested attributes into an AFSStoreStatus block
174 */
xdr_encode_AFS_StoreStatus(__be32 ** _bp,struct iattr * attr)175 static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
176 {
177 __be32 *bp = *_bp;
178 u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
179
180 mask = 0;
181 if (attr->ia_valid & ATTR_MTIME) {
182 mask |= AFS_SET_MTIME;
183 mtime = attr->ia_mtime.tv_sec;
184 }
185
186 if (attr->ia_valid & ATTR_UID) {
187 mask |= AFS_SET_OWNER;
188 owner = from_kuid(&init_user_ns, attr->ia_uid);
189 }
190
191 if (attr->ia_valid & ATTR_GID) {
192 mask |= AFS_SET_GROUP;
193 group = from_kgid(&init_user_ns, attr->ia_gid);
194 }
195
196 if (attr->ia_valid & ATTR_MODE) {
197 mask |= AFS_SET_MODE;
198 mode = attr->ia_mode & S_IALLUGO;
199 }
200
201 *bp++ = htonl(mask);
202 *bp++ = htonl(mtime);
203 *bp++ = htonl(owner);
204 *bp++ = htonl(group);
205 *bp++ = htonl(mode);
206 *bp++ = 0; /* segment size */
207 *_bp = bp;
208 }
209
210 /*
211 * decode an AFSFetchVolumeStatus block
212 */
xdr_decode_AFSFetchVolumeStatus(const __be32 ** _bp,struct afs_volume_status * vs)213 static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
214 struct afs_volume_status *vs)
215 {
216 const __be32 *bp = *_bp;
217
218 vs->vid = ntohl(*bp++);
219 vs->parent_id = ntohl(*bp++);
220 vs->online = ntohl(*bp++);
221 vs->in_service = ntohl(*bp++);
222 vs->blessed = ntohl(*bp++);
223 vs->needs_salvage = ntohl(*bp++);
224 vs->type = ntohl(*bp++);
225 vs->min_quota = ntohl(*bp++);
226 vs->max_quota = ntohl(*bp++);
227 vs->blocks_in_use = ntohl(*bp++);
228 vs->part_blocks_avail = ntohl(*bp++);
229 vs->part_max_blocks = ntohl(*bp++);
230 vs->vol_copy_date = 0;
231 vs->vol_backup_date = 0;
232 *_bp = bp;
233 }
234
235 /*
236 * deliver reply data to an FS.FetchStatus
237 */
afs_deliver_fs_fetch_status(struct afs_call * call)238 static int afs_deliver_fs_fetch_status(struct afs_call *call)
239 {
240 struct afs_operation *op = call->op;
241 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
242 const __be32 *bp;
243 int ret;
244
245 ret = afs_transfer_reply(call);
246 if (ret < 0)
247 return ret;
248
249 /* unmarshall the reply once we've received all of it */
250 bp = call->buffer;
251 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
252 xdr_decode_AFSCallBack(&bp, call, &vp->scb);
253 xdr_decode_AFSVolSync(&bp, &op->volsync);
254
255 _leave(" = 0 [done]");
256 return 0;
257 }
258
259 /*
260 * FS.FetchStatus operation type
261 */
262 static const struct afs_call_type afs_RXFSFetchStatus = {
263 .name = "FS.FetchStatus",
264 .op = afs_FS_FetchStatus,
265 .deliver = afs_deliver_fs_fetch_status,
266 .destructor = afs_flat_call_destructor,
267 };
268
269 /*
270 * fetch the status information for a file
271 */
afs_fs_fetch_status(struct afs_operation * op)272 void afs_fs_fetch_status(struct afs_operation *op)
273 {
274 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
275 struct afs_call *call;
276 __be32 *bp;
277
278 _enter(",%x,{%llx:%llu},,",
279 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
280
281 call = afs_alloc_flat_call(op->net, &afs_RXFSFetchStatus,
282 16, (21 + 3 + 6) * 4);
283 if (!call)
284 return afs_op_nomem(op);
285
286 /* marshall the parameters */
287 bp = call->request;
288 bp[0] = htonl(FSFETCHSTATUS);
289 bp[1] = htonl(vp->fid.vid);
290 bp[2] = htonl(vp->fid.vnode);
291 bp[3] = htonl(vp->fid.unique);
292
293 call->fid = vp->fid;
294 trace_afs_make_fs_call(call, &vp->fid);
295 afs_make_op_call(op, call, GFP_NOFS);
296 }
297
298 /*
299 * deliver reply data to an FS.FetchData
300 */
afs_deliver_fs_fetch_data(struct afs_call * call)301 static int afs_deliver_fs_fetch_data(struct afs_call *call)
302 {
303 struct afs_operation *op = call->op;
304 struct afs_vnode_param *vp = &op->file[0];
305 struct afs_read *req = op->fetch.req;
306 const __be32 *bp;
307 size_t count_before;
308 int ret;
309
310 _enter("{%u,%zu,%zu/%llu}",
311 call->unmarshall, call->iov_len, iov_iter_count(call->iter),
312 req->actual_len);
313
314 switch (call->unmarshall) {
315 case 0:
316 req->actual_len = 0;
317 call->unmarshall++;
318 if (call->operation_ID == FSFETCHDATA64) {
319 afs_extract_to_tmp64(call);
320 } else {
321 call->tmp_u = htonl(0);
322 afs_extract_to_tmp(call);
323 }
324 fallthrough;
325
326 /* Extract the returned data length into
327 * ->actual_len. This may indicate more or less data than was
328 * requested will be returned.
329 */
330 case 1:
331 _debug("extract data length");
332 ret = afs_extract_data(call, true);
333 if (ret < 0)
334 return ret;
335
336 req->actual_len = be64_to_cpu(call->tmp64);
337 _debug("DATA length: %llu", req->actual_len);
338
339 if (req->actual_len == 0)
340 goto no_more_data;
341
342 call->iter = req->iter;
343 call->iov_len = min(req->actual_len, req->len);
344 call->unmarshall++;
345 fallthrough;
346
347 /* extract the returned data */
348 case 2:
349 count_before = call->iov_len;
350 _debug("extract data %zu/%llu", count_before, req->actual_len);
351
352 ret = afs_extract_data(call, true);
353 if (req->subreq) {
354 req->subreq->transferred += count_before - call->iov_len;
355 netfs_read_subreq_progress(req->subreq, false);
356 }
357 if (ret < 0)
358 return ret;
359
360 call->iter = &call->def_iter;
361 if (req->actual_len <= req->len)
362 goto no_more_data;
363
364 /* Discard any excess data the server gave us */
365 afs_extract_discard(call, req->actual_len - req->len);
366 call->unmarshall = 3;
367 fallthrough;
368
369 case 3:
370 _debug("extract discard %zu/%llu",
371 iov_iter_count(call->iter), req->actual_len - req->len);
372
373 ret = afs_extract_data(call, true);
374 if (ret < 0)
375 return ret;
376
377 no_more_data:
378 call->unmarshall = 4;
379 afs_extract_to_buf(call, (21 + 3 + 6) * 4);
380 fallthrough;
381
382 /* extract the metadata */
383 case 4:
384 ret = afs_extract_data(call, false);
385 if (ret < 0)
386 return ret;
387
388 bp = call->buffer;
389 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
390 xdr_decode_AFSCallBack(&bp, call, &vp->scb);
391 xdr_decode_AFSVolSync(&bp, &op->volsync);
392
393 req->data_version = vp->scb.status.data_version;
394 req->file_size = vp->scb.status.size;
395
396 call->unmarshall++;
397 fallthrough;
398
399 case 5:
400 break;
401 }
402
403 _leave(" = 0 [done]");
404 return 0;
405 }
406
407 /*
408 * FS.FetchData operation type
409 */
410 static const struct afs_call_type afs_RXFSFetchData = {
411 .name = "FS.FetchData",
412 .op = afs_FS_FetchData,
413 .deliver = afs_deliver_fs_fetch_data,
414 .destructor = afs_flat_call_destructor,
415 };
416
417 static const struct afs_call_type afs_RXFSFetchData64 = {
418 .name = "FS.FetchData64",
419 .op = afs_FS_FetchData64,
420 .deliver = afs_deliver_fs_fetch_data,
421 .destructor = afs_flat_call_destructor,
422 };
423
424 /*
425 * fetch data from a very large file
426 */
afs_fs_fetch_data64(struct afs_operation * op)427 static void afs_fs_fetch_data64(struct afs_operation *op)
428 {
429 struct afs_vnode_param *vp = &op->file[0];
430 struct afs_read *req = op->fetch.req;
431 struct afs_call *call;
432 __be32 *bp;
433
434 _enter("");
435
436 call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
437 if (!call)
438 return afs_op_nomem(op);
439
440 /* marshall the parameters */
441 bp = call->request;
442 bp[0] = htonl(FSFETCHDATA64);
443 bp[1] = htonl(vp->fid.vid);
444 bp[2] = htonl(vp->fid.vnode);
445 bp[3] = htonl(vp->fid.unique);
446 bp[4] = htonl(upper_32_bits(req->pos));
447 bp[5] = htonl(lower_32_bits(req->pos));
448 bp[6] = 0;
449 bp[7] = htonl(lower_32_bits(req->len));
450
451 call->fid = vp->fid;
452 trace_afs_make_fs_call(call, &vp->fid);
453 afs_make_op_call(op, call, GFP_NOFS);
454 }
455
456 /*
457 * fetch data from a file
458 */
afs_fs_fetch_data(struct afs_operation * op)459 void afs_fs_fetch_data(struct afs_operation *op)
460 {
461 struct afs_vnode_param *vp = &op->file[0];
462 struct afs_call *call;
463 struct afs_read *req = op->fetch.req;
464 __be32 *bp;
465
466 if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
467 return afs_fs_fetch_data64(op);
468
469 _enter("");
470
471 call = afs_alloc_flat_call(op->net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
472 if (!call)
473 return afs_op_nomem(op);
474
475 req->call_debug_id = call->debug_id;
476
477 /* marshall the parameters */
478 bp = call->request;
479 bp[0] = htonl(FSFETCHDATA);
480 bp[1] = htonl(vp->fid.vid);
481 bp[2] = htonl(vp->fid.vnode);
482 bp[3] = htonl(vp->fid.unique);
483 bp[4] = htonl(lower_32_bits(req->pos));
484 bp[5] = htonl(lower_32_bits(req->len));
485
486 call->fid = vp->fid;
487 trace_afs_make_fs_call(call, &vp->fid);
488 afs_make_op_call(op, call, GFP_NOFS);
489 }
490
491 /*
492 * deliver reply data to an FS.CreateFile or an FS.MakeDir
493 */
afs_deliver_fs_create_vnode(struct afs_call * call)494 static int afs_deliver_fs_create_vnode(struct afs_call *call)
495 {
496 struct afs_operation *op = call->op;
497 struct afs_vnode_param *dvp = &op->file[0];
498 struct afs_vnode_param *vp = &op->file[1];
499 const __be32 *bp;
500 int ret;
501
502 ret = afs_transfer_reply(call);
503 if (ret < 0)
504 return ret;
505
506 /* unmarshall the reply once we've received all of it */
507 bp = call->buffer;
508 xdr_decode_AFSFid(&bp, &op->file[1].fid);
509 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
510 xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
511 xdr_decode_AFSCallBack(&bp, call, &vp->scb);
512 xdr_decode_AFSVolSync(&bp, &op->volsync);
513
514 _leave(" = 0 [done]");
515 return 0;
516 }
517
518 /*
519 * FS.CreateFile and FS.MakeDir operation type
520 */
521 static const struct afs_call_type afs_RXFSCreateFile = {
522 .name = "FS.CreateFile",
523 .op = afs_FS_CreateFile,
524 .deliver = afs_deliver_fs_create_vnode,
525 .destructor = afs_flat_call_destructor,
526 };
527
528 /*
529 * Create a file.
530 */
afs_fs_create_file(struct afs_operation * op)531 void afs_fs_create_file(struct afs_operation *op)
532 {
533 const struct qstr *name = &op->dentry->d_name;
534 struct afs_vnode_param *dvp = &op->file[0];
535 struct afs_call *call;
536 size_t namesz, reqsz, padsz;
537 __be32 *bp;
538
539 _enter("");
540
541 namesz = name->len;
542 padsz = (4 - (namesz & 3)) & 3;
543 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
544
545 call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile,
546 reqsz, (3 + 21 + 21 + 3 + 6) * 4);
547 if (!call)
548 return afs_op_nomem(op);
549
550 /* marshall the parameters */
551 bp = call->request;
552 *bp++ = htonl(FSCREATEFILE);
553 *bp++ = htonl(dvp->fid.vid);
554 *bp++ = htonl(dvp->fid.vnode);
555 *bp++ = htonl(dvp->fid.unique);
556 *bp++ = htonl(namesz);
557 memcpy(bp, name->name, namesz);
558 bp = (void *) bp + namesz;
559 if (padsz > 0) {
560 memset(bp, 0, padsz);
561 bp = (void *) bp + padsz;
562 }
563 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
564 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
565 *bp++ = 0; /* owner */
566 *bp++ = 0; /* group */
567 *bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */
568 *bp++ = 0; /* segment size */
569
570 call->fid = dvp->fid;
571 trace_afs_make_fs_call1(call, &dvp->fid, name);
572 afs_make_op_call(op, call, GFP_NOFS);
573 }
574
575 static const struct afs_call_type afs_RXFSMakeDir = {
576 .name = "FS.MakeDir",
577 .op = afs_FS_MakeDir,
578 .deliver = afs_deliver_fs_create_vnode,
579 .destructor = afs_flat_call_destructor,
580 };
581
582 /*
583 * Create a new directory
584 */
afs_fs_make_dir(struct afs_operation * op)585 void afs_fs_make_dir(struct afs_operation *op)
586 {
587 const struct qstr *name = &op->dentry->d_name;
588 struct afs_vnode_param *dvp = &op->file[0];
589 struct afs_call *call;
590 size_t namesz, reqsz, padsz;
591 __be32 *bp;
592
593 _enter("");
594
595 namesz = name->len;
596 padsz = (4 - (namesz & 3)) & 3;
597 reqsz = (5 * 4) + namesz + padsz + (6 * 4);
598
599 call = afs_alloc_flat_call(op->net, &afs_RXFSMakeDir,
600 reqsz, (3 + 21 + 21 + 3 + 6) * 4);
601 if (!call)
602 return afs_op_nomem(op);
603
604 /* marshall the parameters */
605 bp = call->request;
606 *bp++ = htonl(FSMAKEDIR);
607 *bp++ = htonl(dvp->fid.vid);
608 *bp++ = htonl(dvp->fid.vnode);
609 *bp++ = htonl(dvp->fid.unique);
610 *bp++ = htonl(namesz);
611 memcpy(bp, name->name, namesz);
612 bp = (void *) bp + namesz;
613 if (padsz > 0) {
614 memset(bp, 0, padsz);
615 bp = (void *) bp + padsz;
616 }
617 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
618 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
619 *bp++ = 0; /* owner */
620 *bp++ = 0; /* group */
621 *bp++ = htonl(op->create.mode & S_IALLUGO); /* unix mode */
622 *bp++ = 0; /* segment size */
623
624 call->fid = dvp->fid;
625 trace_afs_make_fs_call1(call, &dvp->fid, name);
626 afs_make_op_call(op, call, GFP_NOFS);
627 }
628
629 /*
630 * Deliver reply data to any operation that returns status and volume sync.
631 */
afs_deliver_fs_file_status_and_vol(struct afs_call * call)632 static int afs_deliver_fs_file_status_and_vol(struct afs_call *call)
633 {
634 struct afs_operation *op = call->op;
635 struct afs_vnode_param *vp = &op->file[0];
636 const __be32 *bp;
637 int ret;
638
639 ret = afs_transfer_reply(call);
640 if (ret < 0)
641 return ret;
642
643 /* unmarshall the reply once we've received all of it */
644 bp = call->buffer;
645 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
646 xdr_decode_AFSVolSync(&bp, &op->volsync);
647
648 _leave(" = 0 [done]");
649 return 0;
650 }
651
652 /*
653 * FS.RemoveFile operation type
654 */
655 static const struct afs_call_type afs_RXFSRemoveFile = {
656 .name = "FS.RemoveFile",
657 .op = afs_FS_RemoveFile,
658 .deliver = afs_deliver_fs_file_status_and_vol,
659 .destructor = afs_flat_call_destructor,
660 };
661
662 /*
663 * Remove a file.
664 */
afs_fs_remove_file(struct afs_operation * op)665 void afs_fs_remove_file(struct afs_operation *op)
666 {
667 const struct qstr *name = &op->dentry->d_name;
668 struct afs_vnode_param *dvp = &op->file[0];
669 struct afs_call *call;
670 size_t namesz, reqsz, padsz;
671 __be32 *bp;
672
673 _enter("");
674
675 namesz = name->len;
676 padsz = (4 - (namesz & 3)) & 3;
677 reqsz = (5 * 4) + namesz + padsz;
678
679 call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveFile,
680 reqsz, (21 + 6) * 4);
681 if (!call)
682 return afs_op_nomem(op);
683
684 /* marshall the parameters */
685 bp = call->request;
686 *bp++ = htonl(FSREMOVEFILE);
687 *bp++ = htonl(dvp->fid.vid);
688 *bp++ = htonl(dvp->fid.vnode);
689 *bp++ = htonl(dvp->fid.unique);
690 *bp++ = htonl(namesz);
691 memcpy(bp, name->name, namesz);
692 bp = (void *) bp + namesz;
693 if (padsz > 0) {
694 memset(bp, 0, padsz);
695 bp = (void *) bp + padsz;
696 }
697
698 call->fid = dvp->fid;
699 trace_afs_make_fs_call1(call, &dvp->fid, name);
700 afs_make_op_call(op, call, GFP_NOFS);
701 }
702
703 static const struct afs_call_type afs_RXFSRemoveDir = {
704 .name = "FS.RemoveDir",
705 .op = afs_FS_RemoveDir,
706 .deliver = afs_deliver_fs_file_status_and_vol,
707 .destructor = afs_flat_call_destructor,
708 };
709
710 /*
711 * Remove a directory.
712 */
afs_fs_remove_dir(struct afs_operation * op)713 void afs_fs_remove_dir(struct afs_operation *op)
714 {
715 const struct qstr *name = &op->dentry->d_name;
716 struct afs_vnode_param *dvp = &op->file[0];
717 struct afs_call *call;
718 size_t namesz, reqsz, padsz;
719 __be32 *bp;
720
721 _enter("");
722
723 namesz = name->len;
724 padsz = (4 - (namesz & 3)) & 3;
725 reqsz = (5 * 4) + namesz + padsz;
726
727 call = afs_alloc_flat_call(op->net, &afs_RXFSRemoveDir,
728 reqsz, (21 + 6) * 4);
729 if (!call)
730 return afs_op_nomem(op);
731
732 /* marshall the parameters */
733 bp = call->request;
734 *bp++ = htonl(FSREMOVEDIR);
735 *bp++ = htonl(dvp->fid.vid);
736 *bp++ = htonl(dvp->fid.vnode);
737 *bp++ = htonl(dvp->fid.unique);
738 *bp++ = htonl(namesz);
739 memcpy(bp, name->name, namesz);
740 bp = (void *) bp + namesz;
741 if (padsz > 0) {
742 memset(bp, 0, padsz);
743 bp = (void *) bp + padsz;
744 }
745
746 call->fid = dvp->fid;
747 trace_afs_make_fs_call1(call, &dvp->fid, name);
748 afs_make_op_call(op, call, GFP_NOFS);
749 }
750
751 /*
752 * deliver reply data to an FS.Link
753 */
afs_deliver_fs_link(struct afs_call * call)754 static int afs_deliver_fs_link(struct afs_call *call)
755 {
756 struct afs_operation *op = call->op;
757 struct afs_vnode_param *dvp = &op->file[0];
758 struct afs_vnode_param *vp = &op->file[1];
759 const __be32 *bp;
760 int ret;
761
762 _enter("{%u}", call->unmarshall);
763
764 ret = afs_transfer_reply(call);
765 if (ret < 0)
766 return ret;
767
768 /* unmarshall the reply once we've received all of it */
769 bp = call->buffer;
770 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
771 xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
772 xdr_decode_AFSVolSync(&bp, &op->volsync);
773
774 _leave(" = 0 [done]");
775 return 0;
776 }
777
778 /*
779 * FS.Link operation type
780 */
781 static const struct afs_call_type afs_RXFSLink = {
782 .name = "FS.Link",
783 .op = afs_FS_Link,
784 .deliver = afs_deliver_fs_link,
785 .destructor = afs_flat_call_destructor,
786 };
787
788 /*
789 * make a hard link
790 */
afs_fs_link(struct afs_operation * op)791 void afs_fs_link(struct afs_operation *op)
792 {
793 const struct qstr *name = &op->dentry->d_name;
794 struct afs_vnode_param *dvp = &op->file[0];
795 struct afs_vnode_param *vp = &op->file[1];
796 struct afs_call *call;
797 size_t namesz, reqsz, padsz;
798 __be32 *bp;
799
800 _enter("");
801
802 namesz = name->len;
803 padsz = (4 - (namesz & 3)) & 3;
804 reqsz = (5 * 4) + namesz + padsz + (3 * 4);
805
806 call = afs_alloc_flat_call(op->net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
807 if (!call)
808 return afs_op_nomem(op);
809
810 /* marshall the parameters */
811 bp = call->request;
812 *bp++ = htonl(FSLINK);
813 *bp++ = htonl(dvp->fid.vid);
814 *bp++ = htonl(dvp->fid.vnode);
815 *bp++ = htonl(dvp->fid.unique);
816 *bp++ = htonl(namesz);
817 memcpy(bp, name->name, namesz);
818 bp = (void *) bp + namesz;
819 if (padsz > 0) {
820 memset(bp, 0, padsz);
821 bp = (void *) bp + padsz;
822 }
823 *bp++ = htonl(vp->fid.vid);
824 *bp++ = htonl(vp->fid.vnode);
825 *bp++ = htonl(vp->fid.unique);
826
827 call->fid = vp->fid;
828 trace_afs_make_fs_call1(call, &vp->fid, name);
829 afs_make_op_call(op, call, GFP_NOFS);
830 }
831
832 /*
833 * deliver reply data to an FS.Symlink
834 */
afs_deliver_fs_symlink(struct afs_call * call)835 static int afs_deliver_fs_symlink(struct afs_call *call)
836 {
837 struct afs_operation *op = call->op;
838 struct afs_vnode_param *dvp = &op->file[0];
839 struct afs_vnode_param *vp = &op->file[1];
840 const __be32 *bp;
841 int ret;
842
843 _enter("{%u}", call->unmarshall);
844
845 ret = afs_transfer_reply(call);
846 if (ret < 0)
847 return ret;
848
849 /* unmarshall the reply once we've received all of it */
850 bp = call->buffer;
851 xdr_decode_AFSFid(&bp, &vp->fid);
852 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
853 xdr_decode_AFSFetchStatus(&bp, call, &dvp->scb);
854 xdr_decode_AFSVolSync(&bp, &op->volsync);
855
856 _leave(" = 0 [done]");
857 return 0;
858 }
859
860 /*
861 * FS.Symlink operation type
862 */
863 static const struct afs_call_type afs_RXFSSymlink = {
864 .name = "FS.Symlink",
865 .op = afs_FS_Symlink,
866 .deliver = afs_deliver_fs_symlink,
867 .destructor = afs_flat_call_destructor,
868 };
869
870 /*
871 * create a symbolic link
872 */
afs_fs_symlink(struct afs_operation * op)873 void afs_fs_symlink(struct afs_operation *op)
874 {
875 const struct qstr *name = &op->dentry->d_name;
876 struct afs_vnode_param *dvp = &op->file[0];
877 struct afs_call *call;
878 size_t namesz, reqsz, padsz, c_namesz, c_padsz;
879 __be32 *bp;
880
881 _enter("");
882
883 namesz = name->len;
884 padsz = (4 - (namesz & 3)) & 3;
885
886 c_namesz = strlen(op->create.symlink);
887 c_padsz = (4 - (c_namesz & 3)) & 3;
888
889 reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
890
891 call = afs_alloc_flat_call(op->net, &afs_RXFSSymlink, reqsz,
892 (3 + 21 + 21 + 6) * 4);
893 if (!call)
894 return afs_op_nomem(op);
895
896 /* marshall the parameters */
897 bp = call->request;
898 *bp++ = htonl(FSSYMLINK);
899 *bp++ = htonl(dvp->fid.vid);
900 *bp++ = htonl(dvp->fid.vnode);
901 *bp++ = htonl(dvp->fid.unique);
902 *bp++ = htonl(namesz);
903 memcpy(bp, name->name, namesz);
904 bp = (void *) bp + namesz;
905 if (padsz > 0) {
906 memset(bp, 0, padsz);
907 bp = (void *) bp + padsz;
908 }
909 *bp++ = htonl(c_namesz);
910 memcpy(bp, op->create.symlink, c_namesz);
911 bp = (void *) bp + c_namesz;
912 if (c_padsz > 0) {
913 memset(bp, 0, c_padsz);
914 bp = (void *) bp + c_padsz;
915 }
916 *bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
917 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
918 *bp++ = 0; /* owner */
919 *bp++ = 0; /* group */
920 *bp++ = htonl(S_IRWXUGO); /* unix mode */
921 *bp++ = 0; /* segment size */
922
923 call->fid = dvp->fid;
924 trace_afs_make_fs_call1(call, &dvp->fid, name);
925 afs_make_op_call(op, call, GFP_NOFS);
926 }
927
928 /*
929 * deliver reply data to an FS.Rename
930 */
afs_deliver_fs_rename(struct afs_call * call)931 static int afs_deliver_fs_rename(struct afs_call *call)
932 {
933 struct afs_operation *op = call->op;
934 struct afs_vnode_param *orig_dvp = &op->file[0];
935 struct afs_vnode_param *new_dvp = &op->file[1];
936 const __be32 *bp;
937 int ret;
938
939 ret = afs_transfer_reply(call);
940 if (ret < 0)
941 return ret;
942
943 bp = call->buffer;
944 /* If the two dirs are the same, we have two copies of the same status
945 * report, so we just decode it twice.
946 */
947 xdr_decode_AFSFetchStatus(&bp, call, &orig_dvp->scb);
948 xdr_decode_AFSFetchStatus(&bp, call, &new_dvp->scb);
949 xdr_decode_AFSVolSync(&bp, &op->volsync);
950
951 _leave(" = 0 [done]");
952 return 0;
953 }
954
955 /*
956 * FS.Rename operation type
957 */
958 static const struct afs_call_type afs_RXFSRename = {
959 .name = "FS.Rename",
960 .op = afs_FS_Rename,
961 .deliver = afs_deliver_fs_rename,
962 .destructor = afs_flat_call_destructor,
963 };
964
965 /*
966 * Rename/move a file or directory.
967 */
afs_fs_rename(struct afs_operation * op)968 void afs_fs_rename(struct afs_operation *op)
969 {
970 struct afs_vnode_param *orig_dvp = &op->file[0];
971 struct afs_vnode_param *new_dvp = &op->file[1];
972 const struct qstr *orig_name = &op->dentry->d_name;
973 const struct qstr *new_name = &op->dentry_2->d_name;
974 struct afs_call *call;
975 size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
976 __be32 *bp;
977
978 _enter("");
979
980 o_namesz = orig_name->len;
981 o_padsz = (4 - (o_namesz & 3)) & 3;
982
983 n_namesz = new_name->len;
984 n_padsz = (4 - (n_namesz & 3)) & 3;
985
986 reqsz = (4 * 4) +
987 4 + o_namesz + o_padsz +
988 (3 * 4) +
989 4 + n_namesz + n_padsz;
990
991 call = afs_alloc_flat_call(op->net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
992 if (!call)
993 return afs_op_nomem(op);
994
995 /* marshall the parameters */
996 bp = call->request;
997 *bp++ = htonl(FSRENAME);
998 *bp++ = htonl(orig_dvp->fid.vid);
999 *bp++ = htonl(orig_dvp->fid.vnode);
1000 *bp++ = htonl(orig_dvp->fid.unique);
1001 *bp++ = htonl(o_namesz);
1002 memcpy(bp, orig_name->name, o_namesz);
1003 bp = (void *) bp + o_namesz;
1004 if (o_padsz > 0) {
1005 memset(bp, 0, o_padsz);
1006 bp = (void *) bp + o_padsz;
1007 }
1008
1009 *bp++ = htonl(new_dvp->fid.vid);
1010 *bp++ = htonl(new_dvp->fid.vnode);
1011 *bp++ = htonl(new_dvp->fid.unique);
1012 *bp++ = htonl(n_namesz);
1013 memcpy(bp, new_name->name, n_namesz);
1014 bp = (void *) bp + n_namesz;
1015 if (n_padsz > 0) {
1016 memset(bp, 0, n_padsz);
1017 bp = (void *) bp + n_padsz;
1018 }
1019
1020 call->fid = orig_dvp->fid;
1021 trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
1022 afs_make_op_call(op, call, GFP_NOFS);
1023 }
1024
1025 /*
1026 * Deliver reply data to FS.StoreData or FS.StoreStatus
1027 */
afs_deliver_fs_store_data(struct afs_call * call)1028 static int afs_deliver_fs_store_data(struct afs_call *call)
1029 {
1030 struct afs_operation *op = call->op;
1031 struct afs_vnode_param *vp = &op->file[0];
1032 const __be32 *bp;
1033 int ret;
1034
1035 _enter("");
1036
1037 ret = afs_transfer_reply(call);
1038 if (ret < 0)
1039 return ret;
1040
1041 /* unmarshall the reply once we've received all of it */
1042 bp = call->buffer;
1043 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
1044 xdr_decode_AFSVolSync(&bp, &op->volsync);
1045
1046 _leave(" = 0 [done]");
1047 return 0;
1048 }
1049
1050 /*
1051 * FS.StoreData operation type
1052 */
1053 static const struct afs_call_type afs_RXFSStoreData = {
1054 .name = "FS.StoreData",
1055 .op = afs_FS_StoreData,
1056 .deliver = afs_deliver_fs_store_data,
1057 .destructor = afs_flat_call_destructor,
1058 };
1059
1060 static const struct afs_call_type afs_RXFSStoreData64 = {
1061 .name = "FS.StoreData64",
1062 .op = afs_FS_StoreData64,
1063 .deliver = afs_deliver_fs_store_data,
1064 .destructor = afs_flat_call_destructor,
1065 };
1066
1067 /*
1068 * store a set of pages to a very large file
1069 */
afs_fs_store_data64(struct afs_operation * op)1070 static void afs_fs_store_data64(struct afs_operation *op)
1071 {
1072 struct afs_vnode_param *vp = &op->file[0];
1073 struct afs_call *call;
1074 __be32 *bp;
1075
1076 _enter(",%x,{%llx:%llu},,",
1077 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1078
1079 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64,
1080 (4 + 6 + 3 * 2) * 4,
1081 (21 + 6) * 4);
1082 if (!call)
1083 return afs_op_nomem(op);
1084
1085 call->write_iter = op->store.write_iter;
1086
1087 /* marshall the parameters */
1088 bp = call->request;
1089 *bp++ = htonl(FSSTOREDATA64);
1090 *bp++ = htonl(vp->fid.vid);
1091 *bp++ = htonl(vp->fid.vnode);
1092 *bp++ = htonl(vp->fid.unique);
1093
1094 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1095 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
1096 *bp++ = 0; /* owner */
1097 *bp++ = 0; /* group */
1098 *bp++ = 0; /* unix mode */
1099 *bp++ = 0; /* segment size */
1100
1101 *bp++ = htonl(upper_32_bits(op->store.pos));
1102 *bp++ = htonl(lower_32_bits(op->store.pos));
1103 *bp++ = htonl(upper_32_bits(op->store.size));
1104 *bp++ = htonl(lower_32_bits(op->store.size));
1105 *bp++ = htonl(upper_32_bits(op->store.i_size));
1106 *bp++ = htonl(lower_32_bits(op->store.i_size));
1107
1108 call->fid = vp->fid;
1109 trace_afs_make_fs_call(call, &vp->fid);
1110 afs_make_op_call(op, call, GFP_NOFS);
1111 }
1112
1113 /*
1114 * Write data to a file on the server.
1115 */
afs_fs_store_data(struct afs_operation * op)1116 void afs_fs_store_data(struct afs_operation *op)
1117 {
1118 struct afs_vnode_param *vp = &op->file[0];
1119 struct afs_call *call;
1120 __be32 *bp;
1121
1122 _enter(",%x,{%llx:%llu},,",
1123 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1124
1125 _debug("size %llx, at %llx, i_size %llx",
1126 (unsigned long long)op->store.size,
1127 (unsigned long long)op->store.pos,
1128 (unsigned long long)op->store.i_size);
1129
1130 if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
1131 return afs_fs_store_data64(op);
1132
1133 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData,
1134 (4 + 6 + 3) * 4,
1135 (21 + 6) * 4);
1136 if (!call)
1137 return afs_op_nomem(op);
1138
1139 call->write_iter = op->store.write_iter;
1140
1141 /* marshall the parameters */
1142 bp = call->request;
1143 *bp++ = htonl(FSSTOREDATA);
1144 *bp++ = htonl(vp->fid.vid);
1145 *bp++ = htonl(vp->fid.vnode);
1146 *bp++ = htonl(vp->fid.unique);
1147
1148 *bp++ = htonl(AFS_SET_MTIME); /* mask */
1149 *bp++ = htonl(op->mtime.tv_sec); /* mtime */
1150 *bp++ = 0; /* owner */
1151 *bp++ = 0; /* group */
1152 *bp++ = 0; /* unix mode */
1153 *bp++ = 0; /* segment size */
1154
1155 *bp++ = htonl(lower_32_bits(op->store.pos));
1156 *bp++ = htonl(lower_32_bits(op->store.size));
1157 *bp++ = htonl(lower_32_bits(op->store.i_size));
1158
1159 call->fid = vp->fid;
1160 trace_afs_make_fs_call(call, &vp->fid);
1161 afs_make_op_call(op, call, GFP_NOFS);
1162 }
1163
1164 /*
1165 * FS.StoreStatus operation type
1166 */
1167 static const struct afs_call_type afs_RXFSStoreStatus = {
1168 .name = "FS.StoreStatus",
1169 .op = afs_FS_StoreStatus,
1170 .deliver = afs_deliver_fs_store_data,
1171 .destructor = afs_flat_call_destructor,
1172 };
1173
1174 static const struct afs_call_type afs_RXFSStoreData_as_Status = {
1175 .name = "FS.StoreData",
1176 .op = afs_FS_StoreData,
1177 .deliver = afs_deliver_fs_store_data,
1178 .destructor = afs_flat_call_destructor,
1179 };
1180
1181 static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
1182 .name = "FS.StoreData64",
1183 .op = afs_FS_StoreData64,
1184 .deliver = afs_deliver_fs_store_data,
1185 .destructor = afs_flat_call_destructor,
1186 };
1187
1188 /*
1189 * set the attributes on a very large file, using FS.StoreData rather than
1190 * FS.StoreStatus so as to alter the file size also
1191 */
afs_fs_setattr_size64(struct afs_operation * op)1192 static void afs_fs_setattr_size64(struct afs_operation *op)
1193 {
1194 struct afs_vnode_param *vp = &op->file[0];
1195 struct afs_call *call;
1196 struct iattr *attr = op->setattr.attr;
1197 __be32 *bp;
1198
1199 _enter(",%x,{%llx:%llu},,",
1200 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1201
1202 ASSERT(attr->ia_valid & ATTR_SIZE);
1203
1204 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData64_as_Status,
1205 (4 + 6 + 3 * 2) * 4,
1206 (21 + 6) * 4);
1207 if (!call)
1208 return afs_op_nomem(op);
1209
1210 /* marshall the parameters */
1211 bp = call->request;
1212 *bp++ = htonl(FSSTOREDATA64);
1213 *bp++ = htonl(vp->fid.vid);
1214 *bp++ = htonl(vp->fid.vnode);
1215 *bp++ = htonl(vp->fid.unique);
1216
1217 xdr_encode_AFS_StoreStatus(&bp, attr);
1218
1219 *bp++ = htonl(upper_32_bits(attr->ia_size)); /* position of start of write */
1220 *bp++ = htonl(lower_32_bits(attr->ia_size));
1221 *bp++ = 0; /* size of write */
1222 *bp++ = 0;
1223 *bp++ = htonl(upper_32_bits(attr->ia_size)); /* new file length */
1224 *bp++ = htonl(lower_32_bits(attr->ia_size));
1225
1226 call->fid = vp->fid;
1227 trace_afs_make_fs_call(call, &vp->fid);
1228 afs_make_op_call(op, call, GFP_NOFS);
1229 }
1230
1231 /*
1232 * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
1233 * so as to alter the file size also
1234 */
afs_fs_setattr_size(struct afs_operation * op)1235 static void afs_fs_setattr_size(struct afs_operation *op)
1236 {
1237 struct afs_vnode_param *vp = &op->file[0];
1238 struct afs_call *call;
1239 struct iattr *attr = op->setattr.attr;
1240 __be32 *bp;
1241
1242 _enter(",%x,{%llx:%llu},,",
1243 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1244
1245 ASSERT(attr->ia_valid & ATTR_SIZE);
1246 if (test_bit(AFS_SERVER_FL_HAS_FS64, &op->server->flags))
1247 return afs_fs_setattr_size64(op);
1248
1249 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreData_as_Status,
1250 (4 + 6 + 3) * 4,
1251 (21 + 6) * 4);
1252 if (!call)
1253 return afs_op_nomem(op);
1254
1255 /* marshall the parameters */
1256 bp = call->request;
1257 *bp++ = htonl(FSSTOREDATA);
1258 *bp++ = htonl(vp->fid.vid);
1259 *bp++ = htonl(vp->fid.vnode);
1260 *bp++ = htonl(vp->fid.unique);
1261
1262 xdr_encode_AFS_StoreStatus(&bp, attr);
1263
1264 *bp++ = htonl(attr->ia_size); /* position of start of write */
1265 *bp++ = 0; /* size of write */
1266 *bp++ = htonl(attr->ia_size); /* new file length */
1267
1268 call->fid = vp->fid;
1269 trace_afs_make_fs_call(call, &vp->fid);
1270 afs_make_op_call(op, call, GFP_NOFS);
1271 }
1272
1273 /*
1274 * set the attributes on a file, using FS.StoreData if there's a change in file
1275 * size, and FS.StoreStatus otherwise
1276 */
afs_fs_setattr(struct afs_operation * op)1277 void afs_fs_setattr(struct afs_operation *op)
1278 {
1279 struct afs_vnode_param *vp = &op->file[0];
1280 struct afs_call *call;
1281 struct iattr *attr = op->setattr.attr;
1282 __be32 *bp;
1283
1284 if (attr->ia_valid & ATTR_SIZE)
1285 return afs_fs_setattr_size(op);
1286
1287 _enter(",%x,{%llx:%llu},,",
1288 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1289
1290 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreStatus,
1291 (4 + 6) * 4,
1292 (21 + 6) * 4);
1293 if (!call)
1294 return afs_op_nomem(op);
1295
1296 /* marshall the parameters */
1297 bp = call->request;
1298 *bp++ = htonl(FSSTORESTATUS);
1299 *bp++ = htonl(vp->fid.vid);
1300 *bp++ = htonl(vp->fid.vnode);
1301 *bp++ = htonl(vp->fid.unique);
1302
1303 xdr_encode_AFS_StoreStatus(&bp, op->setattr.attr);
1304
1305 call->fid = vp->fid;
1306 trace_afs_make_fs_call(call, &vp->fid);
1307 afs_make_op_call(op, call, GFP_NOFS);
1308 }
1309
1310 /*
1311 * deliver reply data to an FS.GetVolumeStatus
1312 */
afs_deliver_fs_get_volume_status(struct afs_call * call)1313 static int afs_deliver_fs_get_volume_status(struct afs_call *call)
1314 {
1315 struct afs_operation *op = call->op;
1316 const __be32 *bp;
1317 char *p;
1318 u32 size;
1319 int ret;
1320
1321 _enter("{%u}", call->unmarshall);
1322
1323 switch (call->unmarshall) {
1324 case 0:
1325 call->unmarshall++;
1326 afs_extract_to_buf(call, 12 * 4);
1327 fallthrough;
1328
1329 /* extract the returned status record */
1330 case 1:
1331 _debug("extract status");
1332 ret = afs_extract_data(call, true);
1333 if (ret < 0)
1334 return ret;
1335
1336 bp = call->buffer;
1337 xdr_decode_AFSFetchVolumeStatus(&bp, &op->volstatus.vs);
1338 call->unmarshall++;
1339 afs_extract_to_tmp(call);
1340 fallthrough;
1341
1342 /* extract the volume name length */
1343 case 2:
1344 ret = afs_extract_data(call, true);
1345 if (ret < 0)
1346 return ret;
1347
1348 call->count = ntohl(call->tmp);
1349 _debug("volname length: %u", call->count);
1350 if (call->count >= AFSNAMEMAX)
1351 return afs_protocol_error(call, afs_eproto_volname_len);
1352 size = (call->count + 3) & ~3; /* It's padded */
1353 afs_extract_to_buf(call, size);
1354 call->unmarshall++;
1355 fallthrough;
1356
1357 /* extract the volume name */
1358 case 3:
1359 _debug("extract volname");
1360 ret = afs_extract_data(call, true);
1361 if (ret < 0)
1362 return ret;
1363
1364 p = call->buffer;
1365 p[call->count] = 0;
1366 _debug("volname '%s'", p);
1367 afs_extract_to_tmp(call);
1368 call->unmarshall++;
1369 fallthrough;
1370
1371 /* extract the offline message length */
1372 case 4:
1373 ret = afs_extract_data(call, true);
1374 if (ret < 0)
1375 return ret;
1376
1377 call->count = ntohl(call->tmp);
1378 _debug("offline msg length: %u", call->count);
1379 if (call->count >= AFSNAMEMAX)
1380 return afs_protocol_error(call, afs_eproto_offline_msg_len);
1381 size = (call->count + 3) & ~3; /* It's padded */
1382 afs_extract_to_buf(call, size);
1383 call->unmarshall++;
1384 fallthrough;
1385
1386 /* extract the offline message */
1387 case 5:
1388 _debug("extract offline");
1389 ret = afs_extract_data(call, true);
1390 if (ret < 0)
1391 return ret;
1392
1393 p = call->buffer;
1394 p[call->count] = 0;
1395 _debug("offline '%s'", p);
1396
1397 afs_extract_to_tmp(call);
1398 call->unmarshall++;
1399 fallthrough;
1400
1401 /* extract the message of the day length */
1402 case 6:
1403 ret = afs_extract_data(call, true);
1404 if (ret < 0)
1405 return ret;
1406
1407 call->count = ntohl(call->tmp);
1408 _debug("motd length: %u", call->count);
1409 if (call->count >= AFSNAMEMAX)
1410 return afs_protocol_error(call, afs_eproto_motd_len);
1411 size = (call->count + 3) & ~3; /* It's padded */
1412 afs_extract_to_buf(call, size);
1413 call->unmarshall++;
1414 fallthrough;
1415
1416 /* extract the message of the day */
1417 case 7:
1418 _debug("extract motd");
1419 ret = afs_extract_data(call, false);
1420 if (ret < 0)
1421 return ret;
1422
1423 p = call->buffer;
1424 p[call->count] = 0;
1425 _debug("motd '%s'", p);
1426
1427 call->unmarshall++;
1428 fallthrough;
1429
1430 case 8:
1431 break;
1432 }
1433
1434 _leave(" = 0 [done]");
1435 return 0;
1436 }
1437
1438 /*
1439 * FS.GetVolumeStatus operation type
1440 */
1441 static const struct afs_call_type afs_RXFSGetVolumeStatus = {
1442 .name = "FS.GetVolumeStatus",
1443 .op = afs_FS_GetVolumeStatus,
1444 .deliver = afs_deliver_fs_get_volume_status,
1445 .destructor = afs_flat_call_destructor,
1446 };
1447
1448 /*
1449 * fetch the status of a volume
1450 */
afs_fs_get_volume_status(struct afs_operation * op)1451 void afs_fs_get_volume_status(struct afs_operation *op)
1452 {
1453 struct afs_vnode_param *vp = &op->file[0];
1454 struct afs_call *call;
1455 __be32 *bp;
1456
1457 _enter("");
1458
1459 call = afs_alloc_flat_call(op->net, &afs_RXFSGetVolumeStatus, 2 * 4,
1460 max(12 * 4, AFSOPAQUEMAX + 1));
1461 if (!call)
1462 return afs_op_nomem(op);
1463
1464 /* marshall the parameters */
1465 bp = call->request;
1466 bp[0] = htonl(FSGETVOLUMESTATUS);
1467 bp[1] = htonl(vp->fid.vid);
1468
1469 call->fid = vp->fid;
1470 trace_afs_make_fs_call(call, &vp->fid);
1471 afs_make_op_call(op, call, GFP_NOFS);
1472 }
1473
1474 /*
1475 * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
1476 */
afs_deliver_fs_xxxx_lock(struct afs_call * call)1477 static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
1478 {
1479 struct afs_operation *op = call->op;
1480 const __be32 *bp;
1481 int ret;
1482
1483 _enter("{%u}", call->unmarshall);
1484
1485 ret = afs_transfer_reply(call);
1486 if (ret < 0)
1487 return ret;
1488
1489 /* unmarshall the reply once we've received all of it */
1490 bp = call->buffer;
1491 xdr_decode_AFSVolSync(&bp, &op->volsync);
1492
1493 _leave(" = 0 [done]");
1494 return 0;
1495 }
1496
1497 /*
1498 * FS.SetLock operation type
1499 */
1500 static const struct afs_call_type afs_RXFSSetLock = {
1501 .name = "FS.SetLock",
1502 .op = afs_FS_SetLock,
1503 .deliver = afs_deliver_fs_xxxx_lock,
1504 .done = afs_lock_op_done,
1505 .destructor = afs_flat_call_destructor,
1506 };
1507
1508 /*
1509 * FS.ExtendLock operation type
1510 */
1511 static const struct afs_call_type afs_RXFSExtendLock = {
1512 .name = "FS.ExtendLock",
1513 .op = afs_FS_ExtendLock,
1514 .deliver = afs_deliver_fs_xxxx_lock,
1515 .done = afs_lock_op_done,
1516 .destructor = afs_flat_call_destructor,
1517 };
1518
1519 /*
1520 * FS.ReleaseLock operation type
1521 */
1522 static const struct afs_call_type afs_RXFSReleaseLock = {
1523 .name = "FS.ReleaseLock",
1524 .op = afs_FS_ReleaseLock,
1525 .deliver = afs_deliver_fs_xxxx_lock,
1526 .destructor = afs_flat_call_destructor,
1527 };
1528
1529 /*
1530 * Set a lock on a file
1531 */
afs_fs_set_lock(struct afs_operation * op)1532 void afs_fs_set_lock(struct afs_operation *op)
1533 {
1534 struct afs_vnode_param *vp = &op->file[0];
1535 struct afs_call *call;
1536 __be32 *bp;
1537
1538 _enter("");
1539
1540 call = afs_alloc_flat_call(op->net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
1541 if (!call)
1542 return afs_op_nomem(op);
1543
1544 /* marshall the parameters */
1545 bp = call->request;
1546 *bp++ = htonl(FSSETLOCK);
1547 *bp++ = htonl(vp->fid.vid);
1548 *bp++ = htonl(vp->fid.vnode);
1549 *bp++ = htonl(vp->fid.unique);
1550 *bp++ = htonl(op->lock.type);
1551
1552 call->fid = vp->fid;
1553 trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
1554 afs_make_op_call(op, call, GFP_NOFS);
1555 }
1556
1557 /*
1558 * extend a lock on a file
1559 */
afs_fs_extend_lock(struct afs_operation * op)1560 void afs_fs_extend_lock(struct afs_operation *op)
1561 {
1562 struct afs_vnode_param *vp = &op->file[0];
1563 struct afs_call *call;
1564 __be32 *bp;
1565
1566 _enter("");
1567
1568 call = afs_alloc_flat_call(op->net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
1569 if (!call)
1570 return afs_op_nomem(op);
1571
1572 /* marshall the parameters */
1573 bp = call->request;
1574 *bp++ = htonl(FSEXTENDLOCK);
1575 *bp++ = htonl(vp->fid.vid);
1576 *bp++ = htonl(vp->fid.vnode);
1577 *bp++ = htonl(vp->fid.unique);
1578
1579 call->fid = vp->fid;
1580 trace_afs_make_fs_call(call, &vp->fid);
1581 afs_make_op_call(op, call, GFP_NOFS);
1582 }
1583
1584 /*
1585 * release a lock on a file
1586 */
afs_fs_release_lock(struct afs_operation * op)1587 void afs_fs_release_lock(struct afs_operation *op)
1588 {
1589 struct afs_vnode_param *vp = &op->file[0];
1590 struct afs_call *call;
1591 __be32 *bp;
1592
1593 _enter("");
1594
1595 call = afs_alloc_flat_call(op->net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
1596 if (!call)
1597 return afs_op_nomem(op);
1598
1599 /* marshall the parameters */
1600 bp = call->request;
1601 *bp++ = htonl(FSRELEASELOCK);
1602 *bp++ = htonl(vp->fid.vid);
1603 *bp++ = htonl(vp->fid.vnode);
1604 *bp++ = htonl(vp->fid.unique);
1605
1606 call->fid = vp->fid;
1607 trace_afs_make_fs_call(call, &vp->fid);
1608 afs_make_op_call(op, call, GFP_NOFS);
1609 }
1610
1611 /*
1612 * Deliver reply data to an FS.GiveUpAllCallBacks operation.
1613 */
afs_deliver_fs_give_up_all_callbacks(struct afs_call * call)1614 static int afs_deliver_fs_give_up_all_callbacks(struct afs_call *call)
1615 {
1616 return afs_transfer_reply(call);
1617 }
1618
1619 /*
1620 * FS.GiveUpAllCallBacks operation type
1621 */
1622 static const struct afs_call_type afs_RXFSGiveUpAllCallBacks = {
1623 .name = "FS.GiveUpAllCallBacks",
1624 .op = afs_FS_GiveUpAllCallBacks,
1625 .deliver = afs_deliver_fs_give_up_all_callbacks,
1626 .destructor = afs_flat_call_destructor,
1627 };
1628
1629 /*
1630 * Flush all the callbacks we have on a server.
1631 */
afs_fs_give_up_all_callbacks(struct afs_net * net,struct afs_server * server,struct afs_address * addr,struct key * key)1632 int afs_fs_give_up_all_callbacks(struct afs_net *net, struct afs_server *server,
1633 struct afs_address *addr, struct key *key)
1634 {
1635 struct afs_call *call;
1636 __be32 *bp;
1637 int ret;
1638
1639 _enter("");
1640
1641 call = afs_alloc_flat_call(net, &afs_RXFSGiveUpAllCallBacks, 1 * 4, 0);
1642 if (!call)
1643 return -ENOMEM;
1644
1645 call->key = key;
1646 call->peer = rxrpc_kernel_get_peer(addr->peer);
1647 call->service_id = server->service_id;
1648
1649 /* marshall the parameters */
1650 bp = call->request;
1651 *bp++ = htonl(FSGIVEUPALLCALLBACKS);
1652
1653 call->server = afs_use_server(server, afs_server_trace_give_up_cb);
1654 afs_make_call(call, GFP_NOFS);
1655 afs_wait_for_call_to_complete(call);
1656 ret = call->error;
1657 if (call->responded)
1658 set_bit(AFS_SERVER_FL_RESPONDING, &server->flags);
1659 afs_put_call(call);
1660 return ret;
1661 }
1662
1663 /*
1664 * Deliver reply data to an FS.GetCapabilities operation.
1665 */
afs_deliver_fs_get_capabilities(struct afs_call * call)1666 static int afs_deliver_fs_get_capabilities(struct afs_call *call)
1667 {
1668 u32 count;
1669 int ret;
1670
1671 _enter("{%u,%zu}", call->unmarshall, iov_iter_count(call->iter));
1672
1673 switch (call->unmarshall) {
1674 case 0:
1675 afs_extract_to_tmp(call);
1676 call->unmarshall++;
1677 fallthrough;
1678
1679 /* Extract the capabilities word count */
1680 case 1:
1681 ret = afs_extract_data(call, true);
1682 if (ret < 0)
1683 return ret;
1684
1685 count = ntohl(call->tmp);
1686 call->count = count;
1687 call->count2 = count;
1688 if (count == 0) {
1689 call->unmarshall = 4;
1690 call->tmp = 0;
1691 break;
1692 }
1693
1694 /* Extract the first word of the capabilities to call->tmp */
1695 afs_extract_to_tmp(call);
1696 call->unmarshall++;
1697 fallthrough;
1698
1699 case 2:
1700 ret = afs_extract_data(call, false);
1701 if (ret < 0)
1702 return ret;
1703
1704 afs_extract_discard(call, (count - 1) * sizeof(__be32));
1705 call->unmarshall++;
1706 fallthrough;
1707
1708 /* Extract remaining capabilities words */
1709 case 3:
1710 ret = afs_extract_data(call, false);
1711 if (ret < 0)
1712 return ret;
1713
1714 call->unmarshall++;
1715 break;
1716 }
1717
1718 _leave(" = 0 [done]");
1719 return 0;
1720 }
1721
afs_fs_get_capabilities_destructor(struct afs_call * call)1722 static void afs_fs_get_capabilities_destructor(struct afs_call *call)
1723 {
1724 afs_put_endpoint_state(call->probe, afs_estate_trace_put_getcaps);
1725 afs_flat_call_destructor(call);
1726 }
1727
1728 /*
1729 * FS.GetCapabilities operation type
1730 */
1731 static const struct afs_call_type afs_RXFSGetCapabilities = {
1732 .name = "FS.GetCapabilities",
1733 .op = afs_FS_GetCapabilities,
1734 .deliver = afs_deliver_fs_get_capabilities,
1735 .done = afs_fileserver_probe_result,
1736 .destructor = afs_fs_get_capabilities_destructor,
1737 };
1738
1739 /*
1740 * Probe a fileserver for the capabilities that it supports. This RPC can
1741 * reply with up to 196 words. The operation is asynchronous and if we managed
1742 * to allocate a call, true is returned the result is delivered through the
1743 * ->done() - otherwise we return false to indicate we didn't even try.
1744 */
afs_fs_get_capabilities(struct afs_net * net,struct afs_server * server,struct afs_endpoint_state * estate,unsigned int addr_index,struct key * key)1745 bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server,
1746 struct afs_endpoint_state *estate, unsigned int addr_index,
1747 struct key *key)
1748 {
1749 struct afs_call *call;
1750 __be32 *bp;
1751
1752 _enter("");
1753
1754 call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
1755 if (!call)
1756 return false;
1757
1758 call->key = key;
1759 call->server = afs_use_server(server, afs_server_trace_get_caps);
1760 call->peer = rxrpc_kernel_get_peer(estate->addresses->addrs[addr_index].peer);
1761 call->probe = afs_get_endpoint_state(estate, afs_estate_trace_get_getcaps);
1762 call->probe_index = addr_index;
1763 call->service_id = server->service_id;
1764 call->upgrade = true;
1765 call->async = true;
1766 call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
1767
1768 /* marshall the parameters */
1769 bp = call->request;
1770 *bp++ = htonl(FSGETCAPABILITIES);
1771
1772 trace_afs_make_fs_call(call, NULL);
1773 afs_make_call(call, GFP_NOFS);
1774 afs_put_call(call);
1775 return true;
1776 }
1777
1778 /*
1779 * Deliver reply data to an FS.InlineBulkStatus call
1780 */
afs_deliver_fs_inline_bulk_status(struct afs_call * call)1781 static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
1782 {
1783 struct afs_operation *op = call->op;
1784 struct afs_status_cb *scb;
1785 const __be32 *bp;
1786 u32 tmp;
1787 int ret;
1788
1789 _enter("{%u}", call->unmarshall);
1790
1791 switch (call->unmarshall) {
1792 case 0:
1793 afs_extract_to_tmp(call);
1794 call->unmarshall++;
1795 fallthrough;
1796
1797 /* Extract the file status count and array in two steps */
1798 case 1:
1799 _debug("extract status count");
1800 ret = afs_extract_data(call, true);
1801 if (ret < 0)
1802 return ret;
1803
1804 tmp = ntohl(call->tmp);
1805 _debug("status count: %u/%u", tmp, op->nr_files);
1806 if (tmp != op->nr_files)
1807 return afs_protocol_error(call, afs_eproto_ibulkst_count);
1808
1809 call->count = 0;
1810 call->unmarshall++;
1811 more_counts:
1812 afs_extract_to_buf(call, 21 * sizeof(__be32));
1813 fallthrough;
1814
1815 case 2:
1816 _debug("extract status array %u", call->count);
1817 ret = afs_extract_data(call, true);
1818 if (ret < 0)
1819 return ret;
1820
1821 switch (call->count) {
1822 case 0:
1823 scb = &op->file[0].scb;
1824 break;
1825 case 1:
1826 scb = &op->file[1].scb;
1827 break;
1828 default:
1829 scb = &op->more_files[call->count - 2].scb;
1830 break;
1831 }
1832
1833 bp = call->buffer;
1834 xdr_decode_AFSFetchStatus(&bp, call, scb);
1835
1836 call->count++;
1837 if (call->count < op->nr_files)
1838 goto more_counts;
1839
1840 call->count = 0;
1841 call->unmarshall++;
1842 afs_extract_to_tmp(call);
1843 fallthrough;
1844
1845 /* Extract the callback count and array in two steps */
1846 case 3:
1847 _debug("extract CB count");
1848 ret = afs_extract_data(call, true);
1849 if (ret < 0)
1850 return ret;
1851
1852 tmp = ntohl(call->tmp);
1853 _debug("CB count: %u", tmp);
1854 if (tmp != op->nr_files)
1855 return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
1856 call->count = 0;
1857 call->unmarshall++;
1858 more_cbs:
1859 afs_extract_to_buf(call, 3 * sizeof(__be32));
1860 fallthrough;
1861
1862 case 4:
1863 _debug("extract CB array");
1864 ret = afs_extract_data(call, true);
1865 if (ret < 0)
1866 return ret;
1867
1868 _debug("unmarshall CB array");
1869 switch (call->count) {
1870 case 0:
1871 scb = &op->file[0].scb;
1872 break;
1873 case 1:
1874 scb = &op->file[1].scb;
1875 break;
1876 default:
1877 scb = &op->more_files[call->count - 2].scb;
1878 break;
1879 }
1880
1881 bp = call->buffer;
1882 xdr_decode_AFSCallBack(&bp, call, scb);
1883 call->count++;
1884 if (call->count < op->nr_files)
1885 goto more_cbs;
1886
1887 afs_extract_to_buf(call, 6 * sizeof(__be32));
1888 call->unmarshall++;
1889 fallthrough;
1890
1891 case 5:
1892 ret = afs_extract_data(call, false);
1893 if (ret < 0)
1894 return ret;
1895
1896 bp = call->buffer;
1897 /* Unfortunately, prior to OpenAFS-1.6, volsync here is filled
1898 * with rubbish.
1899 */
1900 xdr_decode_AFSVolSync(&bp, NULL);
1901
1902 call->unmarshall++;
1903 fallthrough;
1904
1905 case 6:
1906 break;
1907 }
1908
1909 _leave(" = 0 [done]");
1910 return 0;
1911 }
1912
afs_done_fs_inline_bulk_status(struct afs_call * call)1913 static void afs_done_fs_inline_bulk_status(struct afs_call *call)
1914 {
1915 if (call->error == -ECONNABORTED &&
1916 call->abort_code == RX_INVALID_OPERATION) {
1917 set_bit(AFS_SERVER_FL_NO_IBULK, &call->server->flags);
1918 if (call->op)
1919 set_bit(AFS_VOLUME_MAYBE_NO_IBULK, &call->op->volume->flags);
1920 }
1921 }
1922
1923 /*
1924 * FS.InlineBulkStatus operation type
1925 */
1926 static const struct afs_call_type afs_RXFSInlineBulkStatus = {
1927 .name = "FS.InlineBulkStatus",
1928 .op = afs_FS_InlineBulkStatus,
1929 .deliver = afs_deliver_fs_inline_bulk_status,
1930 .done = afs_done_fs_inline_bulk_status,
1931 .destructor = afs_flat_call_destructor,
1932 };
1933
1934 /*
1935 * Fetch the status information for up to 50 files
1936 */
afs_fs_inline_bulk_status(struct afs_operation * op)1937 void afs_fs_inline_bulk_status(struct afs_operation *op)
1938 {
1939 struct afs_vnode_param *dvp = &op->file[0];
1940 struct afs_vnode_param *vp = &op->file[1];
1941 struct afs_call *call;
1942 __be32 *bp;
1943 int i;
1944
1945 if (test_bit(AFS_SERVER_FL_NO_IBULK, &op->server->flags)) {
1946 afs_op_set_error(op, -ENOTSUPP);
1947 return;
1948 }
1949
1950 _enter(",%x,{%llx:%llu},%u",
1951 key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
1952
1953 call = afs_alloc_flat_call(op->net, &afs_RXFSInlineBulkStatus,
1954 (2 + op->nr_files * 3) * 4,
1955 21 * 4);
1956 if (!call)
1957 return afs_op_nomem(op);
1958
1959 /* marshall the parameters */
1960 bp = call->request;
1961 *bp++ = htonl(FSINLINEBULKSTATUS);
1962 *bp++ = htonl(op->nr_files);
1963 *bp++ = htonl(dvp->fid.vid);
1964 *bp++ = htonl(dvp->fid.vnode);
1965 *bp++ = htonl(dvp->fid.unique);
1966 *bp++ = htonl(vp->fid.vid);
1967 *bp++ = htonl(vp->fid.vnode);
1968 *bp++ = htonl(vp->fid.unique);
1969 for (i = 0; i < op->nr_files - 2; i++) {
1970 *bp++ = htonl(op->more_files[i].fid.vid);
1971 *bp++ = htonl(op->more_files[i].fid.vnode);
1972 *bp++ = htonl(op->more_files[i].fid.unique);
1973 }
1974
1975 call->fid = vp->fid;
1976 trace_afs_make_fs_call(call, &vp->fid);
1977 afs_make_op_call(op, call, GFP_NOFS);
1978 }
1979
1980 /*
1981 * deliver reply data to an FS.FetchACL
1982 */
afs_deliver_fs_fetch_acl(struct afs_call * call)1983 static int afs_deliver_fs_fetch_acl(struct afs_call *call)
1984 {
1985 struct afs_operation *op = call->op;
1986 struct afs_vnode_param *vp = &op->file[0];
1987 struct afs_acl *acl;
1988 const __be32 *bp;
1989 unsigned int size;
1990 int ret;
1991
1992 _enter("{%u}", call->unmarshall);
1993
1994 switch (call->unmarshall) {
1995 case 0:
1996 afs_extract_to_tmp(call);
1997 call->unmarshall++;
1998 fallthrough;
1999
2000 /* extract the returned data length */
2001 case 1:
2002 ret = afs_extract_data(call, true);
2003 if (ret < 0)
2004 return ret;
2005
2006 size = call->count2 = ntohl(call->tmp);
2007 size = round_up(size, 4);
2008
2009 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2010 if (!acl)
2011 return -ENOMEM;
2012 op->acl = acl;
2013 acl->size = call->count2;
2014 afs_extract_begin(call, acl->data, size);
2015 call->unmarshall++;
2016 fallthrough;
2017
2018 /* extract the returned data */
2019 case 2:
2020 ret = afs_extract_data(call, true);
2021 if (ret < 0)
2022 return ret;
2023
2024 afs_extract_to_buf(call, (21 + 6) * 4);
2025 call->unmarshall++;
2026 fallthrough;
2027
2028 /* extract the metadata */
2029 case 3:
2030 ret = afs_extract_data(call, false);
2031 if (ret < 0)
2032 return ret;
2033
2034 bp = call->buffer;
2035 xdr_decode_AFSFetchStatus(&bp, call, &vp->scb);
2036 xdr_decode_AFSVolSync(&bp, &op->volsync);
2037
2038 call->unmarshall++;
2039 fallthrough;
2040
2041 case 4:
2042 break;
2043 }
2044
2045 _leave(" = 0 [done]");
2046 return 0;
2047 }
2048
2049 /*
2050 * FS.FetchACL operation type
2051 */
2052 static const struct afs_call_type afs_RXFSFetchACL = {
2053 .name = "FS.FetchACL",
2054 .op = afs_FS_FetchACL,
2055 .deliver = afs_deliver_fs_fetch_acl,
2056 };
2057
2058 /*
2059 * Fetch the ACL for a file.
2060 */
afs_fs_fetch_acl(struct afs_operation * op)2061 void afs_fs_fetch_acl(struct afs_operation *op)
2062 {
2063 struct afs_vnode_param *vp = &op->file[0];
2064 struct afs_call *call;
2065 __be32 *bp;
2066
2067 _enter(",%x,{%llx:%llu},,",
2068 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
2069
2070 call = afs_alloc_flat_call(op->net, &afs_RXFSFetchACL, 16, (21 + 6) * 4);
2071 if (!call)
2072 return afs_op_nomem(op);
2073
2074 /* marshall the parameters */
2075 bp = call->request;
2076 bp[0] = htonl(FSFETCHACL);
2077 bp[1] = htonl(vp->fid.vid);
2078 bp[2] = htonl(vp->fid.vnode);
2079 bp[3] = htonl(vp->fid.unique);
2080
2081 call->fid = vp->fid;
2082 trace_afs_make_fs_call(call, &vp->fid);
2083 afs_make_op_call(op, call, GFP_KERNEL);
2084 }
2085
2086 /*
2087 * FS.StoreACL operation type
2088 */
2089 static const struct afs_call_type afs_RXFSStoreACL = {
2090 .name = "FS.StoreACL",
2091 .op = afs_FS_StoreACL,
2092 .deliver = afs_deliver_fs_file_status_and_vol,
2093 .destructor = afs_flat_call_destructor,
2094 };
2095
2096 /*
2097 * Fetch the ACL for a file.
2098 */
afs_fs_store_acl(struct afs_operation * op)2099 void afs_fs_store_acl(struct afs_operation *op)
2100 {
2101 struct afs_vnode_param *vp = &op->file[0];
2102 struct afs_call *call;
2103 const struct afs_acl *acl = op->acl;
2104 size_t size;
2105 __be32 *bp;
2106
2107 _enter(",%x,{%llx:%llu},,",
2108 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
2109
2110 size = round_up(acl->size, 4);
2111 call = afs_alloc_flat_call(op->net, &afs_RXFSStoreACL,
2112 5 * 4 + size, (21 + 6) * 4);
2113 if (!call)
2114 return afs_op_nomem(op);
2115
2116 /* marshall the parameters */
2117 bp = call->request;
2118 bp[0] = htonl(FSSTOREACL);
2119 bp[1] = htonl(vp->fid.vid);
2120 bp[2] = htonl(vp->fid.vnode);
2121 bp[3] = htonl(vp->fid.unique);
2122 bp[4] = htonl(acl->size);
2123 memcpy(&bp[5], acl->data, acl->size);
2124 if (acl->size != size)
2125 memset((void *)&bp[5] + acl->size, 0, size - acl->size);
2126
2127 call->fid = vp->fid;
2128 trace_afs_make_fs_call(call, &vp->fid);
2129 afs_make_op_call(op, call, GFP_KERNEL);
2130 }
2131