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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* YFS File Server client stubs
3 *
4 * Copyright (C) 2018 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 "internal.h"
14#include "afs_fs.h"
15#include "xdr_fs.h"
16#include "protocol_yfs.h"
17
18#define xdr_size(x) (sizeof(*x) / sizeof(__be32))
19
20static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
21{
22 const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
23
24 fid->vid = xdr_to_u64(x->volume);
25 fid->vnode = xdr_to_u64(x->vnode.lo);
26 fid->vnode_hi = ntohl(x->vnode.hi);
27 fid->unique = ntohl(x->vnode.unique);
28 *_bp += xdr_size(x);
29}
30
31static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
32{
33 *bp++ = htonl(n);
34 return bp;
35}
36
37static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
38{
39 struct yfs_xdr_u64 *x = (void *)bp;
40
41 *x = u64_to_xdr(n);
42 return bp + xdr_size(x);
43}
44
45static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
46{
47 struct yfs_xdr_YFSFid *x = (void *)bp;
48
49 x->volume = u64_to_xdr(fid->vid);
50 x->vnode.lo = u64_to_xdr(fid->vnode);
51 x->vnode.hi = htonl(fid->vnode_hi);
52 x->vnode.unique = htonl(fid->unique);
53 return bp + xdr_size(x);
54}
55
56static size_t xdr_strlen(unsigned int len)
57{
58 return sizeof(__be32) + round_up(len, sizeof(__be32));
59}
60
61static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
62{
63 bp = xdr_encode_u32(bp, len);
64 bp = memcpy(bp, p, len);
65 if (len & 3) {
66 unsigned int pad = 4 - (len & 3);
67
68 memset((u8 *)bp + len, 0, pad);
69 len += pad;
70 }
71
72 return bp + len / sizeof(__be32);
73}
74
75static __be32 *xdr_encode_name(__be32 *bp, const struct qstr *p)
76{
77 return xdr_encode_string(bp, p->name, p->len);
78}
79
80static s64 linux_to_yfs_time(const struct timespec64 *t)
81{
82 /* Convert to 100ns intervals. */
83 return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
84}
85
86static __be32 *xdr_encode_YFSStoreStatus(__be32 *bp, mode_t *mode,
87 const struct timespec64 *t)
88{
89 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
90 mode_t masked_mode = mode ? *mode & S_IALLUGO : 0;
91 s64 mtime = linux_to_yfs_time(t);
92 u32 mask = AFS_SET_MTIME;
93
94 mask |= mode ? AFS_SET_MODE : 0;
95
96 x->mask = htonl(mask);
97 x->mode = htonl(masked_mode);
98 x->mtime_client = u64_to_xdr(mtime);
99 x->owner = u64_to_xdr(0);
100 x->group = u64_to_xdr(0);
101 return bp + xdr_size(x);
102}
103
104/*
105 * Convert a signed 100ns-resolution 64-bit time into a timespec.
106 */
107static struct timespec64 yfs_time_to_linux(s64 t)
108{
109 struct timespec64 ts;
110 u64 abs_t;
111
112 /*
113 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
114 * the alternative, do_div, does not work with negative numbers so have
115 * to special case them
116 */
117 if (t < 0) {
118 abs_t = -t;
119 ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
120 ts.tv_nsec = -ts.tv_nsec;
121 ts.tv_sec = -abs_t;
122 } else {
123 abs_t = t;
124 ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
125 ts.tv_sec = abs_t;
126 }
127
128 return ts;
129}
130
131static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
132{
133 s64 t = xdr_to_u64(xdr);
134
135 return yfs_time_to_linux(t);
136}
137
138static void yfs_check_req(struct afs_call *call, __be32 *bp)
139{
140 size_t len = (void *)bp - call->request;
141
142 if (len > call->request_size)
143 pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
144 call->type->name, len, call->request_size);
145 else if (len < call->request_size)
146 pr_warn("kAFS: %s: Request buffer underflow (%zu<%u)\n",
147 call->type->name, len, call->request_size);
148}
149
150/*
151 * Dump a bad file status record.
152 */
153static void xdr_dump_bad(const __be32 *bp)
154{
155 __be32 x[4];
156 int i;
157
158 pr_notice("YFS XDR: Bad status record\n");
159 for (i = 0; i < 6 * 4 * 4; i += 16) {
160 memcpy(x, bp, 16);
161 bp += 4;
162 pr_notice("%03x: %08x %08x %08x %08x\n",
163 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
164 }
165
166 memcpy(x, bp, 8);
167 pr_notice("0x60: %08x %08x\n", ntohl(x[0]), ntohl(x[1]));
168}
169
170/*
171 * Decode a YFSFetchStatus block
172 */
173static void xdr_decode_YFSFetchStatus(const __be32 **_bp,
174 struct afs_call *call,
175 struct afs_status_cb *scb)
176{
177 const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
178 struct afs_file_status *status = &scb->status;
179 u32 type;
180
181 status->abort_code = ntohl(xdr->abort_code);
182 if (status->abort_code != 0) {
183 if (status->abort_code == VNOVNODE)
184 status->nlink = 0;
185 scb->have_error = true;
186 goto advance;
187 }
188
189 type = ntohl(xdr->type);
190 switch (type) {
191 case AFS_FTYPE_FILE:
192 case AFS_FTYPE_DIR:
193 case AFS_FTYPE_SYMLINK:
194 status->type = type;
195 break;
196 default:
197 goto bad;
198 }
199
200 status->nlink = ntohl(xdr->nlink);
201 status->author = xdr_to_u64(xdr->author);
202 status->owner = xdr_to_u64(xdr->owner);
203 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
204 status->anon_access = ntohl(xdr->anon_access);
205 status->mode = ntohl(xdr->mode) & S_IALLUGO;
206 status->group = xdr_to_u64(xdr->group);
207 status->lock_count = ntohl(xdr->lock_count);
208
209 status->mtime_client = xdr_to_time(xdr->mtime_client);
210 status->mtime_server = xdr_to_time(xdr->mtime_server);
211 status->size = xdr_to_u64(xdr->size);
212 status->data_version = xdr_to_u64(xdr->data_version);
213 scb->have_status = true;
214advance:
215 *_bp += xdr_size(xdr);
216 return;
217
218bad:
219 xdr_dump_bad(*_bp);
220 afs_protocol_error(call, afs_eproto_bad_status);
221 goto advance;
222}
223
224/*
225 * Decode a YFSCallBack block
226 */
227static void xdr_decode_YFSCallBack(const __be32 **_bp,
228 struct afs_call *call,
229 struct afs_status_cb *scb)
230{
231 struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
232 struct afs_callback *cb = &scb->callback;
233 ktime_t cb_expiry;
234
235 cb_expiry = ktime_add(call->issue_time, xdr_to_u64(x->expiration_time) * 100);
236 cb->expires_at = ktime_divns(cb_expiry, NSEC_PER_SEC);
237 scb->have_cb = true;
238 *_bp += xdr_size(x);
239}
240
241/*
242 * Decode a YFSVolSync block
243 */
244static void xdr_decode_YFSVolSync(const __be32 **_bp,
245 struct afs_volsync *volsync)
246{
247 struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
248 u64 creation, update;
249
250 if (volsync) {
251 creation = xdr_to_u64(x->vol_creation_date);
252 do_div(creation, 10 * 1000 * 1000);
253 volsync->creation = creation;
254 update = xdr_to_u64(x->vol_update_date);
255 do_div(update, 10 * 1000 * 1000);
256 volsync->update = update;
257 }
258
259 *_bp += xdr_size(x);
260}
261
262/*
263 * Encode the requested attributes into a YFSStoreStatus block
264 */
265static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
266{
267 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
268 s64 mtime = 0, owner = 0, group = 0;
269 u32 mask = 0, mode = 0;
270
271 mask = 0;
272 if (attr->ia_valid & ATTR_MTIME) {
273 mask |= AFS_SET_MTIME;
274 mtime = linux_to_yfs_time(&attr->ia_mtime);
275 }
276
277 if (attr->ia_valid & ATTR_UID) {
278 mask |= AFS_SET_OWNER;
279 owner = from_kuid(&init_user_ns, attr->ia_uid);
280 }
281
282 if (attr->ia_valid & ATTR_GID) {
283 mask |= AFS_SET_GROUP;
284 group = from_kgid(&init_user_ns, attr->ia_gid);
285 }
286
287 if (attr->ia_valid & ATTR_MODE) {
288 mask |= AFS_SET_MODE;
289 mode = attr->ia_mode & S_IALLUGO;
290 }
291
292 x->mask = htonl(mask);
293 x->mode = htonl(mode);
294 x->mtime_client = u64_to_xdr(mtime);
295 x->owner = u64_to_xdr(owner);
296 x->group = u64_to_xdr(group);
297 return bp + xdr_size(x);
298}
299
300/*
301 * Decode a YFSFetchVolumeStatus block.
302 */
303static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
304 struct afs_volume_status *vs)
305{
306 const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
307 u32 flags;
308
309 vs->vid = xdr_to_u64(x->vid);
310 vs->parent_id = xdr_to_u64(x->parent_id);
311 flags = ntohl(x->flags);
312 vs->online = flags & yfs_FVSOnline;
313 vs->in_service = flags & yfs_FVSInservice;
314 vs->blessed = flags & yfs_FVSBlessed;
315 vs->needs_salvage = flags & yfs_FVSNeedsSalvage;
316 vs->type = ntohl(x->type);
317 vs->min_quota = 0;
318 vs->max_quota = xdr_to_u64(x->max_quota);
319 vs->blocks_in_use = xdr_to_u64(x->blocks_in_use);
320 vs->part_blocks_avail = xdr_to_u64(x->part_blocks_avail);
321 vs->part_max_blocks = xdr_to_u64(x->part_max_blocks);
322 vs->vol_copy_date = xdr_to_u64(x->vol_copy_date);
323 vs->vol_backup_date = xdr_to_u64(x->vol_backup_date);
324 *_bp += sizeof(*x) / sizeof(__be32);
325}
326
327/*
328 * Deliver reply data to operations that just return a file status and a volume
329 * sync record.
330 */
331static int yfs_deliver_status_and_volsync(struct afs_call *call)
332{
333 struct afs_operation *op = call->op;
334 const __be32 *bp;
335 int ret;
336
337 ret = afs_transfer_reply(call);
338 if (ret < 0)
339 return ret;
340
341 bp = call->buffer;
342 xdr_decode_YFSFetchStatus(&bp, call, &op->file[0].scb);
343 xdr_decode_YFSVolSync(&bp, &op->volsync);
344
345 _leave(" = 0 [done]");
346 return 0;
347}
348
349/*
350 * Deliver reply data to an YFS.FetchData64.
351 */
352static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
353{
354 struct afs_operation *op = call->op;
355 struct afs_vnode_param *vp = &op->file[0];
356 struct afs_read *req = op->fetch.req;
357 const __be32 *bp;
358 int ret;
359
360 _enter("{%u,%zu, %zu/%llu}",
361 call->unmarshall, call->iov_len, iov_iter_count(call->iter),
362 req->actual_len);
363
364 switch (call->unmarshall) {
365 case 0:
366 req->actual_len = 0;
367 afs_extract_to_tmp64(call);
368 call->unmarshall++;
369 fallthrough;
370
371 /* Extract the returned data length into ->actual_len. This
372 * may indicate more or less data than was requested will be
373 * returned.
374 */
375 case 1:
376 _debug("extract data length");
377 ret = afs_extract_data(call, true);
378 if (ret < 0)
379 return ret;
380
381 req->actual_len = be64_to_cpu(call->tmp64);
382 _debug("DATA length: %llu", req->actual_len);
383
384 if (req->actual_len == 0)
385 goto no_more_data;
386
387 call->iter = req->iter;
388 call->iov_len = min(req->actual_len, req->len);
389 call->unmarshall++;
390 fallthrough;
391
392 /* extract the returned data */
393 case 2:
394 _debug("extract data %zu/%llu",
395 iov_iter_count(call->iter), req->actual_len);
396
397 ret = afs_extract_data(call, true);
398 if (ret < 0)
399 return ret;
400
401 call->iter = &call->def_iter;
402 if (req->actual_len <= req->len)
403 goto no_more_data;
404
405 /* Discard any excess data the server gave us */
406 afs_extract_discard(call, req->actual_len - req->len);
407 call->unmarshall = 3;
408 fallthrough;
409
410 case 3:
411 _debug("extract discard %zu/%llu",
412 iov_iter_count(call->iter), req->actual_len - req->len);
413
414 ret = afs_extract_data(call, true);
415 if (ret < 0)
416 return ret;
417
418 no_more_data:
419 call->unmarshall = 4;
420 afs_extract_to_buf(call,
421 sizeof(struct yfs_xdr_YFSFetchStatus) +
422 sizeof(struct yfs_xdr_YFSCallBack) +
423 sizeof(struct yfs_xdr_YFSVolSync));
424 fallthrough;
425
426 /* extract the metadata */
427 case 4:
428 ret = afs_extract_data(call, false);
429 if (ret < 0)
430 return ret;
431
432 bp = call->buffer;
433 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
434 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
435 xdr_decode_YFSVolSync(&bp, &op->volsync);
436
437 req->data_version = vp->scb.status.data_version;
438 req->file_size = vp->scb.status.size;
439
440 call->unmarshall++;
441 fallthrough;
442
443 case 5:
444 break;
445 }
446
447 _leave(" = 0 [done]");
448 return 0;
449}
450
451/*
452 * YFS.FetchData64 operation type
453 */
454static const struct afs_call_type yfs_RXYFSFetchData64 = {
455 .name = "YFS.FetchData64",
456 .op = yfs_FS_FetchData64,
457 .deliver = yfs_deliver_fs_fetch_data64,
458 .destructor = afs_flat_call_destructor,
459};
460
461/*
462 * Fetch data from a file.
463 */
464void yfs_fs_fetch_data(struct afs_operation *op)
465{
466 struct afs_vnode_param *vp = &op->file[0];
467 struct afs_read *req = op->fetch.req;
468 struct afs_call *call;
469 __be32 *bp;
470
471 _enter(",%x,{%llx:%llu},%llx,%llx",
472 key_serial(op->key), vp->fid.vid, vp->fid.vnode,
473 req->pos, req->len);
474
475 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchData64,
476 sizeof(__be32) * 2 +
477 sizeof(struct yfs_xdr_YFSFid) +
478 sizeof(struct yfs_xdr_u64) * 2,
479 sizeof(struct yfs_xdr_YFSFetchStatus) +
480 sizeof(struct yfs_xdr_YFSCallBack) +
481 sizeof(struct yfs_xdr_YFSVolSync));
482 if (!call)
483 return afs_op_nomem(op);
484
485 req->call_debug_id = call->debug_id;
486
487 /* marshall the parameters */
488 bp = call->request;
489 bp = xdr_encode_u32(bp, YFSFETCHDATA64);
490 bp = xdr_encode_u32(bp, 0); /* RPC flags */
491 bp = xdr_encode_YFSFid(bp, &vp->fid);
492 bp = xdr_encode_u64(bp, req->pos);
493 bp = xdr_encode_u64(bp, req->len);
494 yfs_check_req(call, bp);
495
496 call->fid = vp->fid;
497 trace_afs_make_fs_call(call, &vp->fid);
498 afs_make_op_call(op, call, GFP_NOFS);
499}
500
501/*
502 * Deliver reply data for YFS.CreateFile or YFS.MakeDir.
503 */
504static int yfs_deliver_fs_create_vnode(struct afs_call *call)
505{
506 struct afs_operation *op = call->op;
507 struct afs_vnode_param *dvp = &op->file[0];
508 struct afs_vnode_param *vp = &op->file[1];
509 const __be32 *bp;
510 int ret;
511
512 _enter("{%u}", call->unmarshall);
513
514 ret = afs_transfer_reply(call);
515 if (ret < 0)
516 return ret;
517
518 /* unmarshall the reply once we've received all of it */
519 bp = call->buffer;
520 xdr_decode_YFSFid(&bp, &op->file[1].fid);
521 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
522 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
523 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
524 xdr_decode_YFSVolSync(&bp, &op->volsync);
525
526 _leave(" = 0 [done]");
527 return 0;
528}
529
530/*
531 * FS.CreateFile and FS.MakeDir operation type
532 */
533static const struct afs_call_type afs_RXFSCreateFile = {
534 .name = "YFS.CreateFile",
535 .op = yfs_FS_CreateFile,
536 .deliver = yfs_deliver_fs_create_vnode,
537 .destructor = afs_flat_call_destructor,
538};
539
540/*
541 * Create a file.
542 */
543void yfs_fs_create_file(struct afs_operation *op)
544{
545 const struct qstr *name = &op->dentry->d_name;
546 struct afs_vnode_param *dvp = &op->file[0];
547 struct afs_call *call;
548 size_t reqsz, rplsz;
549 __be32 *bp;
550
551 _enter("");
552
553 reqsz = (sizeof(__be32) +
554 sizeof(__be32) +
555 sizeof(struct yfs_xdr_YFSFid) +
556 xdr_strlen(name->len) +
557 sizeof(struct yfs_xdr_YFSStoreStatus) +
558 sizeof(__be32));
559 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
560 sizeof(struct yfs_xdr_YFSFetchStatus) +
561 sizeof(struct yfs_xdr_YFSFetchStatus) +
562 sizeof(struct yfs_xdr_YFSCallBack) +
563 sizeof(struct yfs_xdr_YFSVolSync));
564
565 call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile, reqsz, rplsz);
566 if (!call)
567 return afs_op_nomem(op);
568
569 /* marshall the parameters */
570 bp = call->request;
571 bp = xdr_encode_u32(bp, YFSCREATEFILE);
572 bp = xdr_encode_u32(bp, 0); /* RPC flags */
573 bp = xdr_encode_YFSFid(bp, &dvp->fid);
574 bp = xdr_encode_name(bp, name);
575 bp = xdr_encode_YFSStoreStatus(bp, &op->create.mode, &op->mtime);
576 bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
577 yfs_check_req(call, bp);
578
579 call->fid = dvp->fid;
580 trace_afs_make_fs_call1(call, &dvp->fid, name);
581 afs_make_op_call(op, call, GFP_NOFS);
582}
583
584static const struct afs_call_type yfs_RXFSMakeDir = {
585 .name = "YFS.MakeDir",
586 .op = yfs_FS_MakeDir,
587 .deliver = yfs_deliver_fs_create_vnode,
588 .destructor = afs_flat_call_destructor,
589};
590
591/*
592 * Make a directory.
593 */
594void yfs_fs_make_dir(struct afs_operation *op)
595{
596 const struct qstr *name = &op->dentry->d_name;
597 struct afs_vnode_param *dvp = &op->file[0];
598 struct afs_call *call;
599 size_t reqsz, rplsz;
600 __be32 *bp;
601
602 _enter("");
603
604 reqsz = (sizeof(__be32) +
605 sizeof(struct yfs_xdr_RPCFlags) +
606 sizeof(struct yfs_xdr_YFSFid) +
607 xdr_strlen(name->len) +
608 sizeof(struct yfs_xdr_YFSStoreStatus));
609 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
610 sizeof(struct yfs_xdr_YFSFetchStatus) +
611 sizeof(struct yfs_xdr_YFSFetchStatus) +
612 sizeof(struct yfs_xdr_YFSCallBack) +
613 sizeof(struct yfs_xdr_YFSVolSync));
614
615 call = afs_alloc_flat_call(op->net, &yfs_RXFSMakeDir, reqsz, rplsz);
616 if (!call)
617 return afs_op_nomem(op);
618
619 /* marshall the parameters */
620 bp = call->request;
621 bp = xdr_encode_u32(bp, YFSMAKEDIR);
622 bp = xdr_encode_u32(bp, 0); /* RPC flags */
623 bp = xdr_encode_YFSFid(bp, &dvp->fid);
624 bp = xdr_encode_name(bp, name);
625 bp = xdr_encode_YFSStoreStatus(bp, &op->create.mode, &op->mtime);
626 yfs_check_req(call, bp);
627
628 call->fid = dvp->fid;
629 trace_afs_make_fs_call1(call, &dvp->fid, name);
630 afs_make_op_call(op, call, GFP_NOFS);
631}
632
633/*
634 * Deliver reply data to a YFS.RemoveFile2 operation.
635 */
636static int yfs_deliver_fs_remove_file2(struct afs_call *call)
637{
638 struct afs_operation *op = call->op;
639 struct afs_vnode_param *dvp = &op->file[0];
640 struct afs_vnode_param *vp = &op->file[1];
641 struct afs_fid fid;
642 const __be32 *bp;
643 int ret;
644
645 _enter("{%u}", call->unmarshall);
646
647 ret = afs_transfer_reply(call);
648 if (ret < 0)
649 return ret;
650
651 bp = call->buffer;
652 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
653 xdr_decode_YFSFid(&bp, &fid);
654 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
655 /* Was deleted if vnode->status.abort_code == VNOVNODE. */
656
657 xdr_decode_YFSVolSync(&bp, &op->volsync);
658 return 0;
659}
660
661static void yfs_done_fs_remove_file2(struct afs_call *call)
662{
663 if (call->error == -ECONNABORTED &&
664 call->abort_code == RX_INVALID_OPERATION) {
665 set_bit(AFS_SERVER_FL_NO_RM2, &call->server->flags);
666 call->op->flags |= AFS_OPERATION_DOWNGRADE;
667 }
668}
669
670/*
671 * YFS.RemoveFile2 operation type.
672 */
673static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
674 .name = "YFS.RemoveFile2",
675 .op = yfs_FS_RemoveFile2,
676 .deliver = yfs_deliver_fs_remove_file2,
677 .done = yfs_done_fs_remove_file2,
678 .destructor = afs_flat_call_destructor,
679};
680
681/*
682 * Remove a file and retrieve new file status.
683 */
684void yfs_fs_remove_file2(struct afs_operation *op)
685{
686 struct afs_vnode_param *dvp = &op->file[0];
687 const struct qstr *name = &op->dentry->d_name;
688 struct afs_call *call;
689 __be32 *bp;
690
691 _enter("");
692
693 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile2,
694 sizeof(__be32) +
695 sizeof(struct yfs_xdr_RPCFlags) +
696 sizeof(struct yfs_xdr_YFSFid) +
697 xdr_strlen(name->len),
698 sizeof(struct yfs_xdr_YFSFetchStatus) +
699 sizeof(struct yfs_xdr_YFSFid) +
700 sizeof(struct yfs_xdr_YFSFetchStatus) +
701 sizeof(struct yfs_xdr_YFSVolSync));
702 if (!call)
703 return afs_op_nomem(op);
704
705 /* marshall the parameters */
706 bp = call->request;
707 bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
708 bp = xdr_encode_u32(bp, 0); /* RPC flags */
709 bp = xdr_encode_YFSFid(bp, &dvp->fid);
710 bp = xdr_encode_name(bp, name);
711 yfs_check_req(call, bp);
712
713 call->fid = dvp->fid;
714 trace_afs_make_fs_call1(call, &dvp->fid, name);
715 afs_make_op_call(op, call, GFP_NOFS);
716}
717
718/*
719 * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
720 */
721static int yfs_deliver_fs_remove(struct afs_call *call)
722{
723 struct afs_operation *op = call->op;
724 struct afs_vnode_param *dvp = &op->file[0];
725 const __be32 *bp;
726 int ret;
727
728 _enter("{%u}", call->unmarshall);
729
730 ret = afs_transfer_reply(call);
731 if (ret < 0)
732 return ret;
733
734 bp = call->buffer;
735 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
736 xdr_decode_YFSVolSync(&bp, &op->volsync);
737 return 0;
738}
739
740/*
741 * FS.RemoveDir and FS.RemoveFile operation types.
742 */
743static const struct afs_call_type yfs_RXYFSRemoveFile = {
744 .name = "YFS.RemoveFile",
745 .op = yfs_FS_RemoveFile,
746 .deliver = yfs_deliver_fs_remove,
747 .destructor = afs_flat_call_destructor,
748};
749
750/*
751 * Remove a file.
752 */
753void yfs_fs_remove_file(struct afs_operation *op)
754{
755 const struct qstr *name = &op->dentry->d_name;
756 struct afs_vnode_param *dvp = &op->file[0];
757 struct afs_call *call;
758 __be32 *bp;
759
760 _enter("");
761
762 if (!test_bit(AFS_SERVER_FL_NO_RM2, &op->server->flags))
763 return yfs_fs_remove_file2(op);
764
765 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile,
766 sizeof(__be32) +
767 sizeof(struct yfs_xdr_RPCFlags) +
768 sizeof(struct yfs_xdr_YFSFid) +
769 xdr_strlen(name->len),
770 sizeof(struct yfs_xdr_YFSFetchStatus) +
771 sizeof(struct yfs_xdr_YFSVolSync));
772 if (!call)
773 return afs_op_nomem(op);
774
775 /* marshall the parameters */
776 bp = call->request;
777 bp = xdr_encode_u32(bp, YFSREMOVEFILE);
778 bp = xdr_encode_u32(bp, 0); /* RPC flags */
779 bp = xdr_encode_YFSFid(bp, &dvp->fid);
780 bp = xdr_encode_name(bp, name);
781 yfs_check_req(call, bp);
782
783 call->fid = dvp->fid;
784 trace_afs_make_fs_call1(call, &dvp->fid, name);
785 afs_make_op_call(op, call, GFP_NOFS);
786}
787
788static const struct afs_call_type yfs_RXYFSRemoveDir = {
789 .name = "YFS.RemoveDir",
790 .op = yfs_FS_RemoveDir,
791 .deliver = yfs_deliver_fs_remove,
792 .destructor = afs_flat_call_destructor,
793};
794
795/*
796 * Remove a directory.
797 */
798void yfs_fs_remove_dir(struct afs_operation *op)
799{
800 const struct qstr *name = &op->dentry->d_name;
801 struct afs_vnode_param *dvp = &op->file[0];
802 struct afs_call *call;
803 __be32 *bp;
804
805 _enter("");
806
807 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveDir,
808 sizeof(__be32) +
809 sizeof(struct yfs_xdr_RPCFlags) +
810 sizeof(struct yfs_xdr_YFSFid) +
811 xdr_strlen(name->len),
812 sizeof(struct yfs_xdr_YFSFetchStatus) +
813 sizeof(struct yfs_xdr_YFSVolSync));
814 if (!call)
815 return afs_op_nomem(op);
816
817 /* marshall the parameters */
818 bp = call->request;
819 bp = xdr_encode_u32(bp, YFSREMOVEDIR);
820 bp = xdr_encode_u32(bp, 0); /* RPC flags */
821 bp = xdr_encode_YFSFid(bp, &dvp->fid);
822 bp = xdr_encode_name(bp, name);
823 yfs_check_req(call, bp);
824
825 call->fid = dvp->fid;
826 trace_afs_make_fs_call1(call, &dvp->fid, name);
827 afs_make_op_call(op, call, GFP_NOFS);
828}
829
830/*
831 * Deliver reply data to a YFS.Link operation.
832 */
833static int yfs_deliver_fs_link(struct afs_call *call)
834{
835 struct afs_operation *op = call->op;
836 struct afs_vnode_param *dvp = &op->file[0];
837 struct afs_vnode_param *vp = &op->file[1];
838 const __be32 *bp;
839 int ret;
840
841 _enter("{%u}", call->unmarshall);
842
843 ret = afs_transfer_reply(call);
844 if (ret < 0)
845 return ret;
846
847 bp = call->buffer;
848 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
849 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
850 xdr_decode_YFSVolSync(&bp, &op->volsync);
851 _leave(" = 0 [done]");
852 return 0;
853}
854
855/*
856 * YFS.Link operation type.
857 */
858static const struct afs_call_type yfs_RXYFSLink = {
859 .name = "YFS.Link",
860 .op = yfs_FS_Link,
861 .deliver = yfs_deliver_fs_link,
862 .destructor = afs_flat_call_destructor,
863};
864
865/*
866 * Make a hard link.
867 */
868void yfs_fs_link(struct afs_operation *op)
869{
870 const struct qstr *name = &op->dentry->d_name;
871 struct afs_vnode_param *dvp = &op->file[0];
872 struct afs_vnode_param *vp = &op->file[1];
873 struct afs_call *call;
874 __be32 *bp;
875
876 _enter("");
877
878 call = afs_alloc_flat_call(op->net, &yfs_RXYFSLink,
879 sizeof(__be32) +
880 sizeof(struct yfs_xdr_RPCFlags) +
881 sizeof(struct yfs_xdr_YFSFid) +
882 xdr_strlen(name->len) +
883 sizeof(struct yfs_xdr_YFSFid),
884 sizeof(struct yfs_xdr_YFSFetchStatus) +
885 sizeof(struct yfs_xdr_YFSFetchStatus) +
886 sizeof(struct yfs_xdr_YFSVolSync));
887 if (!call)
888 return afs_op_nomem(op);
889
890 /* marshall the parameters */
891 bp = call->request;
892 bp = xdr_encode_u32(bp, YFSLINK);
893 bp = xdr_encode_u32(bp, 0); /* RPC flags */
894 bp = xdr_encode_YFSFid(bp, &dvp->fid);
895 bp = xdr_encode_name(bp, name);
896 bp = xdr_encode_YFSFid(bp, &vp->fid);
897 yfs_check_req(call, bp);
898
899 call->fid = vp->fid;
900 trace_afs_make_fs_call1(call, &vp->fid, name);
901 afs_make_op_call(op, call, GFP_NOFS);
902}
903
904/*
905 * Deliver reply data to a YFS.Symlink operation.
906 */
907static int yfs_deliver_fs_symlink(struct afs_call *call)
908{
909 struct afs_operation *op = call->op;
910 struct afs_vnode_param *dvp = &op->file[0];
911 struct afs_vnode_param *vp = &op->file[1];
912 const __be32 *bp;
913 int ret;
914
915 _enter("{%u}", call->unmarshall);
916
917 ret = afs_transfer_reply(call);
918 if (ret < 0)
919 return ret;
920
921 /* unmarshall the reply once we've received all of it */
922 bp = call->buffer;
923 xdr_decode_YFSFid(&bp, &vp->fid);
924 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
925 xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
926 xdr_decode_YFSVolSync(&bp, &op->volsync);
927
928 _leave(" = 0 [done]");
929 return 0;
930}
931
932/*
933 * YFS.Symlink operation type
934 */
935static const struct afs_call_type yfs_RXYFSSymlink = {
936 .name = "YFS.Symlink",
937 .op = yfs_FS_Symlink,
938 .deliver = yfs_deliver_fs_symlink,
939 .destructor = afs_flat_call_destructor,
940};
941
942/*
943 * Create a symbolic link.
944 */
945void yfs_fs_symlink(struct afs_operation *op)
946{
947 const struct qstr *name = &op->dentry->d_name;
948 struct afs_vnode_param *dvp = &op->file[0];
949 struct afs_call *call;
950 size_t contents_sz;
951 mode_t mode = 0777;
952 __be32 *bp;
953
954 _enter("");
955
956 contents_sz = strlen(op->create.symlink);
957 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSymlink,
958 sizeof(__be32) +
959 sizeof(struct yfs_xdr_RPCFlags) +
960 sizeof(struct yfs_xdr_YFSFid) +
961 xdr_strlen(name->len) +
962 xdr_strlen(contents_sz) +
963 sizeof(struct yfs_xdr_YFSStoreStatus),
964 sizeof(struct yfs_xdr_YFSFid) +
965 sizeof(struct yfs_xdr_YFSFetchStatus) +
966 sizeof(struct yfs_xdr_YFSFetchStatus) +
967 sizeof(struct yfs_xdr_YFSVolSync));
968 if (!call)
969 return afs_op_nomem(op);
970
971 /* marshall the parameters */
972 bp = call->request;
973 bp = xdr_encode_u32(bp, YFSSYMLINK);
974 bp = xdr_encode_u32(bp, 0); /* RPC flags */
975 bp = xdr_encode_YFSFid(bp, &dvp->fid);
976 bp = xdr_encode_name(bp, name);
977 bp = xdr_encode_string(bp, op->create.symlink, contents_sz);
978 bp = xdr_encode_YFSStoreStatus(bp, &mode, &op->mtime);
979 yfs_check_req(call, bp);
980
981 call->fid = dvp->fid;
982 trace_afs_make_fs_call1(call, &dvp->fid, name);
983 afs_make_op_call(op, call, GFP_NOFS);
984}
985
986/*
987 * Deliver reply data to a YFS.Rename operation.
988 */
989static int yfs_deliver_fs_rename(struct afs_call *call)
990{
991 struct afs_operation *op = call->op;
992 struct afs_vnode_param *orig_dvp = &op->file[0];
993 struct afs_vnode_param *new_dvp = &op->file[1];
994 const __be32 *bp;
995 int ret;
996
997 _enter("{%u}", call->unmarshall);
998
999 ret = afs_transfer_reply(call);
1000 if (ret < 0)
1001 return ret;
1002
1003 bp = call->buffer;
1004 /* If the two dirs are the same, we have two copies of the same status
1005 * report, so we just decode it twice.
1006 */
1007 xdr_decode_YFSFetchStatus(&bp, call, &orig_dvp->scb);
1008 xdr_decode_YFSFetchStatus(&bp, call, &new_dvp->scb);
1009 xdr_decode_YFSVolSync(&bp, &op->volsync);
1010 _leave(" = 0 [done]");
1011 return 0;
1012}
1013
1014/*
1015 * YFS.Rename operation type
1016 */
1017static const struct afs_call_type yfs_RXYFSRename = {
1018 .name = "FS.Rename",
1019 .op = yfs_FS_Rename,
1020 .deliver = yfs_deliver_fs_rename,
1021 .destructor = afs_flat_call_destructor,
1022};
1023
1024/*
1025 * Rename a file or directory.
1026 */
1027void yfs_fs_rename(struct afs_operation *op)
1028{
1029 struct afs_vnode_param *orig_dvp = &op->file[0];
1030 struct afs_vnode_param *new_dvp = &op->file[1];
1031 const struct qstr *orig_name = &op->dentry->d_name;
1032 const struct qstr *new_name = &op->dentry_2->d_name;
1033 struct afs_call *call;
1034 __be32 *bp;
1035
1036 _enter("");
1037
1038 call = afs_alloc_flat_call(op->net, &yfs_RXYFSRename,
1039 sizeof(__be32) +
1040 sizeof(struct yfs_xdr_RPCFlags) +
1041 sizeof(struct yfs_xdr_YFSFid) +
1042 xdr_strlen(orig_name->len) +
1043 sizeof(struct yfs_xdr_YFSFid) +
1044 xdr_strlen(new_name->len),
1045 sizeof(struct yfs_xdr_YFSFetchStatus) +
1046 sizeof(struct yfs_xdr_YFSFetchStatus) +
1047 sizeof(struct yfs_xdr_YFSVolSync));
1048 if (!call)
1049 return afs_op_nomem(op);
1050
1051 /* marshall the parameters */
1052 bp = call->request;
1053 bp = xdr_encode_u32(bp, YFSRENAME);
1054 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1055 bp = xdr_encode_YFSFid(bp, &orig_dvp->fid);
1056 bp = xdr_encode_name(bp, orig_name);
1057 bp = xdr_encode_YFSFid(bp, &new_dvp->fid);
1058 bp = xdr_encode_name(bp, new_name);
1059 yfs_check_req(call, bp);
1060
1061 call->fid = orig_dvp->fid;
1062 trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
1063 afs_make_op_call(op, call, GFP_NOFS);
1064}
1065
1066/*
1067 * YFS.StoreData64 operation type.
1068 */
1069static const struct afs_call_type yfs_RXYFSStoreData64 = {
1070 .name = "YFS.StoreData64",
1071 .op = yfs_FS_StoreData64,
1072 .deliver = yfs_deliver_status_and_volsync,
1073 .destructor = afs_flat_call_destructor,
1074};
1075
1076/*
1077 * Store a set of pages to a large file.
1078 */
1079void yfs_fs_store_data(struct afs_operation *op)
1080{
1081 struct afs_vnode_param *vp = &op->file[0];
1082 struct afs_call *call;
1083 __be32 *bp;
1084
1085 _enter(",%x,{%llx:%llu},,",
1086 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1087
1088 _debug("size %llx, at %llx, i_size %llx",
1089 (unsigned long long)op->store.size,
1090 (unsigned long long)op->store.pos,
1091 (unsigned long long)op->store.i_size);
1092
1093 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64,
1094 sizeof(__be32) +
1095 sizeof(__be32) +
1096 sizeof(struct yfs_xdr_YFSFid) +
1097 sizeof(struct yfs_xdr_YFSStoreStatus) +
1098 sizeof(struct yfs_xdr_u64) * 3,
1099 sizeof(struct yfs_xdr_YFSFetchStatus) +
1100 sizeof(struct yfs_xdr_YFSVolSync));
1101 if (!call)
1102 return afs_op_nomem(op);
1103
1104 call->write_iter = op->store.write_iter;
1105
1106 /* marshall the parameters */
1107 bp = call->request;
1108 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1109 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1110 bp = xdr_encode_YFSFid(bp, &vp->fid);
1111 bp = xdr_encode_YFSStoreStatus(bp, NULL, &op->mtime);
1112 bp = xdr_encode_u64(bp, op->store.pos);
1113 bp = xdr_encode_u64(bp, op->store.size);
1114 bp = xdr_encode_u64(bp, op->store.i_size);
1115 yfs_check_req(call, bp);
1116
1117 call->fid = vp->fid;
1118 trace_afs_make_fs_call(call, &vp->fid);
1119 afs_make_op_call(op, call, GFP_NOFS);
1120}
1121
1122/*
1123 * YFS.StoreStatus operation type
1124 */
1125static const struct afs_call_type yfs_RXYFSStoreStatus = {
1126 .name = "YFS.StoreStatus",
1127 .op = yfs_FS_StoreStatus,
1128 .deliver = yfs_deliver_status_and_volsync,
1129 .destructor = afs_flat_call_destructor,
1130};
1131
1132static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1133 .name = "YFS.StoreData64",
1134 .op = yfs_FS_StoreData64,
1135 .deliver = yfs_deliver_status_and_volsync,
1136 .destructor = afs_flat_call_destructor,
1137};
1138
1139/*
1140 * Set the attributes on a file, using YFS.StoreData64 rather than
1141 * YFS.StoreStatus so as to alter the file size also.
1142 */
1143static void yfs_fs_setattr_size(struct afs_operation *op)
1144{
1145 struct afs_vnode_param *vp = &op->file[0];
1146 struct afs_call *call;
1147 struct iattr *attr = op->setattr.attr;
1148 __be32 *bp;
1149
1150 _enter(",%x,{%llx:%llu},,",
1151 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1152
1153 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64_as_Status,
1154 sizeof(__be32) * 2 +
1155 sizeof(struct yfs_xdr_YFSFid) +
1156 sizeof(struct yfs_xdr_YFSStoreStatus) +
1157 sizeof(struct yfs_xdr_u64) * 3,
1158 sizeof(struct yfs_xdr_YFSFetchStatus) +
1159 sizeof(struct yfs_xdr_YFSVolSync));
1160 if (!call)
1161 return afs_op_nomem(op);
1162
1163 /* marshall the parameters */
1164 bp = call->request;
1165 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1166 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1167 bp = xdr_encode_YFSFid(bp, &vp->fid);
1168 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1169 bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
1170 bp = xdr_encode_u64(bp, 0); /* size of write */
1171 bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1172 yfs_check_req(call, bp);
1173
1174 call->fid = vp->fid;
1175 trace_afs_make_fs_call(call, &vp->fid);
1176 afs_make_op_call(op, call, GFP_NOFS);
1177}
1178
1179/*
1180 * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1181 * file size, and YFS.StoreStatus otherwise.
1182 */
1183void yfs_fs_setattr(struct afs_operation *op)
1184{
1185 struct afs_vnode_param *vp = &op->file[0];
1186 struct afs_call *call;
1187 struct iattr *attr = op->setattr.attr;
1188 __be32 *bp;
1189
1190 if (attr->ia_valid & ATTR_SIZE)
1191 return yfs_fs_setattr_size(op);
1192
1193 _enter(",%x,{%llx:%llu},,",
1194 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1195
1196 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreStatus,
1197 sizeof(__be32) * 2 +
1198 sizeof(struct yfs_xdr_YFSFid) +
1199 sizeof(struct yfs_xdr_YFSStoreStatus),
1200 sizeof(struct yfs_xdr_YFSFetchStatus) +
1201 sizeof(struct yfs_xdr_YFSVolSync));
1202 if (!call)
1203 return afs_op_nomem(op);
1204
1205 /* marshall the parameters */
1206 bp = call->request;
1207 bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1208 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1209 bp = xdr_encode_YFSFid(bp, &vp->fid);
1210 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1211 yfs_check_req(call, bp);
1212
1213 call->fid = vp->fid;
1214 trace_afs_make_fs_call(call, &vp->fid);
1215 afs_make_op_call(op, call, GFP_NOFS);
1216}
1217
1218/*
1219 * Deliver reply data to a YFS.GetVolumeStatus operation.
1220 */
1221static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1222{
1223 struct afs_operation *op = call->op;
1224 const __be32 *bp;
1225 char *p;
1226 u32 size;
1227 int ret;
1228
1229 _enter("{%u}", call->unmarshall);
1230
1231 switch (call->unmarshall) {
1232 case 0:
1233 call->unmarshall++;
1234 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1235 fallthrough;
1236
1237 /* extract the returned status record */
1238 case 1:
1239 _debug("extract status");
1240 ret = afs_extract_data(call, true);
1241 if (ret < 0)
1242 return ret;
1243
1244 bp = call->buffer;
1245 xdr_decode_YFSFetchVolumeStatus(&bp, &op->volstatus.vs);
1246 call->unmarshall++;
1247 afs_extract_to_tmp(call);
1248 fallthrough;
1249
1250 /* extract the volume name length */
1251 case 2:
1252 ret = afs_extract_data(call, true);
1253 if (ret < 0)
1254 return ret;
1255
1256 call->count = ntohl(call->tmp);
1257 _debug("volname length: %u", call->count);
1258 if (call->count >= AFSNAMEMAX)
1259 return afs_protocol_error(call, afs_eproto_volname_len);
1260 size = (call->count + 3) & ~3; /* It's padded */
1261 afs_extract_to_buf(call, size);
1262 call->unmarshall++;
1263 fallthrough;
1264
1265 /* extract the volume name */
1266 case 3:
1267 _debug("extract volname");
1268 ret = afs_extract_data(call, true);
1269 if (ret < 0)
1270 return ret;
1271
1272 p = call->buffer;
1273 p[call->count] = 0;
1274 _debug("volname '%s'", p);
1275 afs_extract_to_tmp(call);
1276 call->unmarshall++;
1277 fallthrough;
1278
1279 /* extract the offline message length */
1280 case 4:
1281 ret = afs_extract_data(call, true);
1282 if (ret < 0)
1283 return ret;
1284
1285 call->count = ntohl(call->tmp);
1286 _debug("offline msg length: %u", call->count);
1287 if (call->count >= AFSNAMEMAX)
1288 return afs_protocol_error(call, afs_eproto_offline_msg_len);
1289 size = (call->count + 3) & ~3; /* It's padded */
1290 afs_extract_to_buf(call, size);
1291 call->unmarshall++;
1292 fallthrough;
1293
1294 /* extract the offline message */
1295 case 5:
1296 _debug("extract offline");
1297 ret = afs_extract_data(call, true);
1298 if (ret < 0)
1299 return ret;
1300
1301 p = call->buffer;
1302 p[call->count] = 0;
1303 _debug("offline '%s'", p);
1304
1305 afs_extract_to_tmp(call);
1306 call->unmarshall++;
1307 fallthrough;
1308
1309 /* extract the message of the day length */
1310 case 6:
1311 ret = afs_extract_data(call, true);
1312 if (ret < 0)
1313 return ret;
1314
1315 call->count = ntohl(call->tmp);
1316 _debug("motd length: %u", call->count);
1317 if (call->count >= AFSNAMEMAX)
1318 return afs_protocol_error(call, afs_eproto_motd_len);
1319 size = (call->count + 3) & ~3; /* It's padded */
1320 afs_extract_to_buf(call, size);
1321 call->unmarshall++;
1322 fallthrough;
1323
1324 /* extract the message of the day */
1325 case 7:
1326 _debug("extract motd");
1327 ret = afs_extract_data(call, false);
1328 if (ret < 0)
1329 return ret;
1330
1331 p = call->buffer;
1332 p[call->count] = 0;
1333 _debug("motd '%s'", p);
1334
1335 call->unmarshall++;
1336 fallthrough;
1337
1338 case 8:
1339 break;
1340 }
1341
1342 _leave(" = 0 [done]");
1343 return 0;
1344}
1345
1346/*
1347 * YFS.GetVolumeStatus operation type
1348 */
1349static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1350 .name = "YFS.GetVolumeStatus",
1351 .op = yfs_FS_GetVolumeStatus,
1352 .deliver = yfs_deliver_fs_get_volume_status,
1353 .destructor = afs_flat_call_destructor,
1354};
1355
1356/*
1357 * fetch the status of a volume
1358 */
1359void yfs_fs_get_volume_status(struct afs_operation *op)
1360{
1361 struct afs_vnode_param *vp = &op->file[0];
1362 struct afs_call *call;
1363 __be32 *bp;
1364
1365 _enter("");
1366
1367 call = afs_alloc_flat_call(op->net, &yfs_RXYFSGetVolumeStatus,
1368 sizeof(__be32) * 2 +
1369 sizeof(struct yfs_xdr_u64),
1370 max_t(size_t,
1371 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1372 sizeof(__be32),
1373 AFSOPAQUEMAX + 1));
1374 if (!call)
1375 return afs_op_nomem(op);
1376
1377 /* marshall the parameters */
1378 bp = call->request;
1379 bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1380 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1381 bp = xdr_encode_u64(bp, vp->fid.vid);
1382 yfs_check_req(call, bp);
1383
1384 call->fid = vp->fid;
1385 trace_afs_make_fs_call(call, &vp->fid);
1386 afs_make_op_call(op, call, GFP_NOFS);
1387}
1388
1389/*
1390 * YFS.SetLock operation type
1391 */
1392static const struct afs_call_type yfs_RXYFSSetLock = {
1393 .name = "YFS.SetLock",
1394 .op = yfs_FS_SetLock,
1395 .deliver = yfs_deliver_status_and_volsync,
1396 .done = afs_lock_op_done,
1397 .destructor = afs_flat_call_destructor,
1398};
1399
1400/*
1401 * YFS.ExtendLock operation type
1402 */
1403static const struct afs_call_type yfs_RXYFSExtendLock = {
1404 .name = "YFS.ExtendLock",
1405 .op = yfs_FS_ExtendLock,
1406 .deliver = yfs_deliver_status_and_volsync,
1407 .done = afs_lock_op_done,
1408 .destructor = afs_flat_call_destructor,
1409};
1410
1411/*
1412 * YFS.ReleaseLock operation type
1413 */
1414static const struct afs_call_type yfs_RXYFSReleaseLock = {
1415 .name = "YFS.ReleaseLock",
1416 .op = yfs_FS_ReleaseLock,
1417 .deliver = yfs_deliver_status_and_volsync,
1418 .destructor = afs_flat_call_destructor,
1419};
1420
1421/*
1422 * Set a lock on a file
1423 */
1424void yfs_fs_set_lock(struct afs_operation *op)
1425{
1426 struct afs_vnode_param *vp = &op->file[0];
1427 struct afs_call *call;
1428 __be32 *bp;
1429
1430 _enter("");
1431
1432 call = afs_alloc_flat_call(op->net, &yfs_RXYFSSetLock,
1433 sizeof(__be32) * 2 +
1434 sizeof(struct yfs_xdr_YFSFid) +
1435 sizeof(__be32),
1436 sizeof(struct yfs_xdr_YFSFetchStatus) +
1437 sizeof(struct yfs_xdr_YFSVolSync));
1438 if (!call)
1439 return afs_op_nomem(op);
1440
1441 /* marshall the parameters */
1442 bp = call->request;
1443 bp = xdr_encode_u32(bp, YFSSETLOCK);
1444 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1445 bp = xdr_encode_YFSFid(bp, &vp->fid);
1446 bp = xdr_encode_u32(bp, op->lock.type);
1447 yfs_check_req(call, bp);
1448
1449 call->fid = vp->fid;
1450 trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
1451 afs_make_op_call(op, call, GFP_NOFS);
1452}
1453
1454/*
1455 * extend a lock on a file
1456 */
1457void yfs_fs_extend_lock(struct afs_operation *op)
1458{
1459 struct afs_vnode_param *vp = &op->file[0];
1460 struct afs_call *call;
1461 __be32 *bp;
1462
1463 _enter("");
1464
1465 call = afs_alloc_flat_call(op->net, &yfs_RXYFSExtendLock,
1466 sizeof(__be32) * 2 +
1467 sizeof(struct yfs_xdr_YFSFid),
1468 sizeof(struct yfs_xdr_YFSFetchStatus) +
1469 sizeof(struct yfs_xdr_YFSVolSync));
1470 if (!call)
1471 return afs_op_nomem(op);
1472
1473 /* marshall the parameters */
1474 bp = call->request;
1475 bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1476 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1477 bp = xdr_encode_YFSFid(bp, &vp->fid);
1478 yfs_check_req(call, bp);
1479
1480 call->fid = vp->fid;
1481 trace_afs_make_fs_call(call, &vp->fid);
1482 afs_make_op_call(op, call, GFP_NOFS);
1483}
1484
1485/*
1486 * release a lock on a file
1487 */
1488void yfs_fs_release_lock(struct afs_operation *op)
1489{
1490 struct afs_vnode_param *vp = &op->file[0];
1491 struct afs_call *call;
1492 __be32 *bp;
1493
1494 _enter("");
1495
1496 call = afs_alloc_flat_call(op->net, &yfs_RXYFSReleaseLock,
1497 sizeof(__be32) * 2 +
1498 sizeof(struct yfs_xdr_YFSFid),
1499 sizeof(struct yfs_xdr_YFSFetchStatus) +
1500 sizeof(struct yfs_xdr_YFSVolSync));
1501 if (!call)
1502 return afs_op_nomem(op);
1503
1504 /* marshall the parameters */
1505 bp = call->request;
1506 bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1507 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1508 bp = xdr_encode_YFSFid(bp, &vp->fid);
1509 yfs_check_req(call, bp);
1510
1511 call->fid = vp->fid;
1512 trace_afs_make_fs_call(call, &vp->fid);
1513 afs_make_op_call(op, call, GFP_NOFS);
1514}
1515
1516/*
1517 * Deliver a reply to YFS.FetchStatus
1518 */
1519static int yfs_deliver_fs_fetch_status(struct afs_call *call)
1520{
1521 struct afs_operation *op = call->op;
1522 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1523 const __be32 *bp;
1524 int ret;
1525
1526 ret = afs_transfer_reply(call);
1527 if (ret < 0)
1528 return ret;
1529
1530 /* unmarshall the reply once we've received all of it */
1531 bp = call->buffer;
1532 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1533 xdr_decode_YFSCallBack(&bp, call, &vp->scb);
1534 xdr_decode_YFSVolSync(&bp, &op->volsync);
1535
1536 _leave(" = 0 [done]");
1537 return 0;
1538}
1539
1540/*
1541 * YFS.FetchStatus operation type
1542 */
1543static const struct afs_call_type yfs_RXYFSFetchStatus = {
1544 .name = "YFS.FetchStatus",
1545 .op = yfs_FS_FetchStatus,
1546 .deliver = yfs_deliver_fs_fetch_status,
1547 .destructor = afs_flat_call_destructor,
1548};
1549
1550/*
1551 * Fetch the status information for a fid without needing a vnode handle.
1552 */
1553void yfs_fs_fetch_status(struct afs_operation *op)
1554{
1555 struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
1556 struct afs_call *call;
1557 __be32 *bp;
1558
1559 _enter(",%x,{%llx:%llu},,",
1560 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1561
1562 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchStatus,
1563 sizeof(__be32) * 2 +
1564 sizeof(struct yfs_xdr_YFSFid),
1565 sizeof(struct yfs_xdr_YFSFetchStatus) +
1566 sizeof(struct yfs_xdr_YFSCallBack) +
1567 sizeof(struct yfs_xdr_YFSVolSync));
1568 if (!call)
1569 return afs_op_nomem(op);
1570
1571 /* marshall the parameters */
1572 bp = call->request;
1573 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1574 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1575 bp = xdr_encode_YFSFid(bp, &vp->fid);
1576 yfs_check_req(call, bp);
1577
1578 call->fid = vp->fid;
1579 trace_afs_make_fs_call(call, &vp->fid);
1580 afs_make_op_call(op, call, GFP_NOFS);
1581}
1582
1583/*
1584 * Deliver reply data to an YFS.InlineBulkStatus call
1585 */
1586static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1587{
1588 struct afs_operation *op = call->op;
1589 struct afs_status_cb *scb;
1590 const __be32 *bp;
1591 u32 tmp;
1592 int ret;
1593
1594 _enter("{%u}", call->unmarshall);
1595
1596 switch (call->unmarshall) {
1597 case 0:
1598 afs_extract_to_tmp(call);
1599 call->unmarshall++;
1600 fallthrough;
1601
1602 /* Extract the file status count and array in two steps */
1603 case 1:
1604 _debug("extract status count");
1605 ret = afs_extract_data(call, true);
1606 if (ret < 0)
1607 return ret;
1608
1609 tmp = ntohl(call->tmp);
1610 _debug("status count: %u/%u", tmp, op->nr_files);
1611 if (tmp != op->nr_files)
1612 return afs_protocol_error(call, afs_eproto_ibulkst_count);
1613
1614 call->count = 0;
1615 call->unmarshall++;
1616 more_counts:
1617 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1618 fallthrough;
1619
1620 case 2:
1621 _debug("extract status array %u", call->count);
1622 ret = afs_extract_data(call, true);
1623 if (ret < 0)
1624 return ret;
1625
1626 switch (call->count) {
1627 case 0:
1628 scb = &op->file[0].scb;
1629 break;
1630 case 1:
1631 scb = &op->file[1].scb;
1632 break;
1633 default:
1634 scb = &op->more_files[call->count - 2].scb;
1635 break;
1636 }
1637
1638 bp = call->buffer;
1639 xdr_decode_YFSFetchStatus(&bp, call, scb);
1640
1641 call->count++;
1642 if (call->count < op->nr_files)
1643 goto more_counts;
1644
1645 call->count = 0;
1646 call->unmarshall++;
1647 afs_extract_to_tmp(call);
1648 fallthrough;
1649
1650 /* Extract the callback count and array in two steps */
1651 case 3:
1652 _debug("extract CB count");
1653 ret = afs_extract_data(call, true);
1654 if (ret < 0)
1655 return ret;
1656
1657 tmp = ntohl(call->tmp);
1658 _debug("CB count: %u", tmp);
1659 if (tmp != op->nr_files)
1660 return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
1661 call->count = 0;
1662 call->unmarshall++;
1663 more_cbs:
1664 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1665 fallthrough;
1666
1667 case 4:
1668 _debug("extract CB array");
1669 ret = afs_extract_data(call, true);
1670 if (ret < 0)
1671 return ret;
1672
1673 _debug("unmarshall CB array");
1674 switch (call->count) {
1675 case 0:
1676 scb = &op->file[0].scb;
1677 break;
1678 case 1:
1679 scb = &op->file[1].scb;
1680 break;
1681 default:
1682 scb = &op->more_files[call->count - 2].scb;
1683 break;
1684 }
1685
1686 bp = call->buffer;
1687 xdr_decode_YFSCallBack(&bp, call, scb);
1688 call->count++;
1689 if (call->count < op->nr_files)
1690 goto more_cbs;
1691
1692 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1693 call->unmarshall++;
1694 fallthrough;
1695
1696 case 5:
1697 ret = afs_extract_data(call, false);
1698 if (ret < 0)
1699 return ret;
1700
1701 bp = call->buffer;
1702 xdr_decode_YFSVolSync(&bp, &op->volsync);
1703
1704 call->unmarshall++;
1705 fallthrough;
1706
1707 case 6:
1708 break;
1709 }
1710
1711 _leave(" = 0 [done]");
1712 return 0;
1713}
1714
1715/*
1716 * FS.InlineBulkStatus operation type
1717 */
1718static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1719 .name = "YFS.InlineBulkStatus",
1720 .op = yfs_FS_InlineBulkStatus,
1721 .deliver = yfs_deliver_fs_inline_bulk_status,
1722 .destructor = afs_flat_call_destructor,
1723};
1724
1725/*
1726 * Fetch the status information for up to 1024 files
1727 */
1728void yfs_fs_inline_bulk_status(struct afs_operation *op)
1729{
1730 struct afs_vnode_param *dvp = &op->file[0];
1731 struct afs_vnode_param *vp = &op->file[1];
1732 struct afs_call *call;
1733 __be32 *bp;
1734 int i;
1735
1736 _enter(",%x,{%llx:%llu},%u",
1737 key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
1738
1739 call = afs_alloc_flat_call(op->net, &yfs_RXYFSInlineBulkStatus,
1740 sizeof(__be32) +
1741 sizeof(__be32) +
1742 sizeof(__be32) +
1743 sizeof(struct yfs_xdr_YFSFid) * op->nr_files,
1744 sizeof(struct yfs_xdr_YFSFetchStatus));
1745 if (!call)
1746 return afs_op_nomem(op);
1747
1748 /* marshall the parameters */
1749 bp = call->request;
1750 bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1751 bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1752 bp = xdr_encode_u32(bp, op->nr_files);
1753 bp = xdr_encode_YFSFid(bp, &dvp->fid);
1754 bp = xdr_encode_YFSFid(bp, &vp->fid);
1755 for (i = 0; i < op->nr_files - 2; i++)
1756 bp = xdr_encode_YFSFid(bp, &op->more_files[i].fid);
1757 yfs_check_req(call, bp);
1758
1759 call->fid = vp->fid;
1760 trace_afs_make_fs_call(call, &vp->fid);
1761 afs_make_op_call(op, call, GFP_NOFS);
1762}
1763
1764/*
1765 * Deliver reply data to an YFS.FetchOpaqueACL.
1766 */
1767static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1768{
1769 struct afs_operation *op = call->op;
1770 struct afs_vnode_param *vp = &op->file[0];
1771 struct yfs_acl *yacl = op->yacl;
1772 struct afs_acl *acl;
1773 const __be32 *bp;
1774 unsigned int size;
1775 int ret;
1776
1777 _enter("{%u}", call->unmarshall);
1778
1779 switch (call->unmarshall) {
1780 case 0:
1781 afs_extract_to_tmp(call);
1782 call->unmarshall++;
1783 fallthrough;
1784
1785 /* Extract the file ACL length */
1786 case 1:
1787 ret = afs_extract_data(call, true);
1788 if (ret < 0)
1789 return ret;
1790
1791 size = call->count2 = ntohl(call->tmp);
1792 size = round_up(size, 4);
1793
1794 if (yacl->flags & YFS_ACL_WANT_ACL) {
1795 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1796 if (!acl)
1797 return -ENOMEM;
1798 yacl->acl = acl;
1799 acl->size = call->count2;
1800 afs_extract_begin(call, acl->data, size);
1801 } else {
1802 afs_extract_discard(call, size);
1803 }
1804 call->unmarshall++;
1805 fallthrough;
1806
1807 /* Extract the file ACL */
1808 case 2:
1809 ret = afs_extract_data(call, true);
1810 if (ret < 0)
1811 return ret;
1812
1813 afs_extract_to_tmp(call);
1814 call->unmarshall++;
1815 fallthrough;
1816
1817 /* Extract the volume ACL length */
1818 case 3:
1819 ret = afs_extract_data(call, true);
1820 if (ret < 0)
1821 return ret;
1822
1823 size = call->count2 = ntohl(call->tmp);
1824 size = round_up(size, 4);
1825
1826 if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
1827 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
1828 if (!acl)
1829 return -ENOMEM;
1830 yacl->vol_acl = acl;
1831 acl->size = call->count2;
1832 afs_extract_begin(call, acl->data, size);
1833 } else {
1834 afs_extract_discard(call, size);
1835 }
1836 call->unmarshall++;
1837 fallthrough;
1838
1839 /* Extract the volume ACL */
1840 case 4:
1841 ret = afs_extract_data(call, true);
1842 if (ret < 0)
1843 return ret;
1844
1845 afs_extract_to_buf(call,
1846 sizeof(__be32) * 2 +
1847 sizeof(struct yfs_xdr_YFSFetchStatus) +
1848 sizeof(struct yfs_xdr_YFSVolSync));
1849 call->unmarshall++;
1850 fallthrough;
1851
1852 /* extract the metadata */
1853 case 5:
1854 ret = afs_extract_data(call, false);
1855 if (ret < 0)
1856 return ret;
1857
1858 bp = call->buffer;
1859 yacl->inherit_flag = ntohl(*bp++);
1860 yacl->num_cleaned = ntohl(*bp++);
1861 xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
1862 xdr_decode_YFSVolSync(&bp, &op->volsync);
1863
1864 call->unmarshall++;
1865 fallthrough;
1866
1867 case 6:
1868 break;
1869 }
1870
1871 _leave(" = 0 [done]");
1872 return 0;
1873}
1874
1875void yfs_free_opaque_acl(struct yfs_acl *yacl)
1876{
1877 if (yacl) {
1878 kfree(yacl->acl);
1879 kfree(yacl->vol_acl);
1880 kfree(yacl);
1881 }
1882}
1883
1884/*
1885 * YFS.FetchOpaqueACL operation type
1886 */
1887static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
1888 .name = "YFS.FetchOpaqueACL",
1889 .op = yfs_FS_FetchOpaqueACL,
1890 .deliver = yfs_deliver_fs_fetch_opaque_acl,
1891 .destructor = afs_flat_call_destructor,
1892};
1893
1894/*
1895 * Fetch the YFS advanced ACLs for a file.
1896 */
1897void yfs_fs_fetch_opaque_acl(struct afs_operation *op)
1898{
1899 struct afs_vnode_param *vp = &op->file[0];
1900 struct afs_call *call;
1901 __be32 *bp;
1902
1903 _enter(",%x,{%llx:%llu},,",
1904 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1905
1906 call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchOpaqueACL,
1907 sizeof(__be32) * 2 +
1908 sizeof(struct yfs_xdr_YFSFid),
1909 sizeof(__be32) * 2 +
1910 sizeof(struct yfs_xdr_YFSFetchStatus) +
1911 sizeof(struct yfs_xdr_YFSVolSync));
1912 if (!call)
1913 return afs_op_nomem(op);
1914
1915 /* marshall the parameters */
1916 bp = call->request;
1917 bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
1918 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1919 bp = xdr_encode_YFSFid(bp, &vp->fid);
1920 yfs_check_req(call, bp);
1921
1922 call->fid = vp->fid;
1923 trace_afs_make_fs_call(call, &vp->fid);
1924 afs_make_op_call(op, call, GFP_KERNEL);
1925}
1926
1927/*
1928 * YFS.StoreOpaqueACL2 operation type
1929 */
1930static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
1931 .name = "YFS.StoreOpaqueACL2",
1932 .op = yfs_FS_StoreOpaqueACL2,
1933 .deliver = yfs_deliver_status_and_volsync,
1934 .destructor = afs_flat_call_destructor,
1935};
1936
1937/*
1938 * Fetch the YFS ACL for a file.
1939 */
1940void yfs_fs_store_opaque_acl2(struct afs_operation *op)
1941{
1942 struct afs_vnode_param *vp = &op->file[0];
1943 struct afs_call *call;
1944 struct afs_acl *acl = op->acl;
1945 size_t size;
1946 __be32 *bp;
1947
1948 _enter(",%x,{%llx:%llu},,",
1949 key_serial(op->key), vp->fid.vid, vp->fid.vnode);
1950
1951 size = round_up(acl->size, 4);
1952 call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreOpaqueACL2,
1953 sizeof(__be32) * 2 +
1954 sizeof(struct yfs_xdr_YFSFid) +
1955 sizeof(__be32) + size,
1956 sizeof(struct yfs_xdr_YFSFetchStatus) +
1957 sizeof(struct yfs_xdr_YFSVolSync));
1958 if (!call)
1959 return afs_op_nomem(op);
1960
1961 /* marshall the parameters */
1962 bp = call->request;
1963 bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
1964 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1965 bp = xdr_encode_YFSFid(bp, &vp->fid);
1966 bp = xdr_encode_u32(bp, acl->size);
1967 memcpy(bp, acl->data, acl->size);
1968 if (acl->size != size)
1969 memset((void *)bp + acl->size, 0, size - acl->size);
1970 bp += size / sizeof(__be32);
1971 yfs_check_req(call, bp);
1972
1973 call->fid = vp->fid;
1974 trace_afs_make_fs_call(call, &vp->fid);
1975 afs_make_op_call(op, call, GFP_KERNEL);
1976}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* YFS File Server client stubs
3 *
4 * Copyright (C) 2018 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 "internal.h"
14#include "afs_fs.h"
15#include "xdr_fs.h"
16#include "protocol_yfs.h"
17
18static const struct afs_fid afs_zero_fid;
19
20static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
21{
22 call->cbi = afs_get_cb_interest(cbi);
23}
24
25#define xdr_size(x) (sizeof(*x) / sizeof(__be32))
26
27static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
28{
29 const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
30
31 fid->vid = xdr_to_u64(x->volume);
32 fid->vnode = xdr_to_u64(x->vnode.lo);
33 fid->vnode_hi = ntohl(x->vnode.hi);
34 fid->unique = ntohl(x->vnode.unique);
35 *_bp += xdr_size(x);
36}
37
38static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
39{
40 *bp++ = htonl(n);
41 return bp;
42}
43
44static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
45{
46 struct yfs_xdr_u64 *x = (void *)bp;
47
48 *x = u64_to_xdr(n);
49 return bp + xdr_size(x);
50}
51
52static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
53{
54 struct yfs_xdr_YFSFid *x = (void *)bp;
55
56 x->volume = u64_to_xdr(fid->vid);
57 x->vnode.lo = u64_to_xdr(fid->vnode);
58 x->vnode.hi = htonl(fid->vnode_hi);
59 x->vnode.unique = htonl(fid->unique);
60 return bp + xdr_size(x);
61}
62
63static size_t xdr_strlen(unsigned int len)
64{
65 return sizeof(__be32) + round_up(len, sizeof(__be32));
66}
67
68static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
69{
70 bp = xdr_encode_u32(bp, len);
71 bp = memcpy(bp, p, len);
72 if (len & 3) {
73 unsigned int pad = 4 - (len & 3);
74
75 memset((u8 *)bp + len, 0, pad);
76 len += pad;
77 }
78
79 return bp + len / sizeof(__be32);
80}
81
82static s64 linux_to_yfs_time(const struct timespec64 *t)
83{
84 /* Convert to 100ns intervals. */
85 return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
86}
87
88static __be32 *xdr_encode_YFSStoreStatus_mode(__be32 *bp, mode_t mode)
89{
90 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
91
92 x->mask = htonl(AFS_SET_MODE);
93 x->mode = htonl(mode & S_IALLUGO);
94 x->mtime_client = u64_to_xdr(0);
95 x->owner = u64_to_xdr(0);
96 x->group = u64_to_xdr(0);
97 return bp + xdr_size(x);
98}
99
100static __be32 *xdr_encode_YFSStoreStatus_mtime(__be32 *bp, const struct timespec64 *t)
101{
102 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
103 s64 mtime = linux_to_yfs_time(t);
104
105 x->mask = htonl(AFS_SET_MTIME);
106 x->mode = htonl(0);
107 x->mtime_client = u64_to_xdr(mtime);
108 x->owner = u64_to_xdr(0);
109 x->group = u64_to_xdr(0);
110 return bp + xdr_size(x);
111}
112
113/*
114 * Convert a signed 100ns-resolution 64-bit time into a timespec.
115 */
116static struct timespec64 yfs_time_to_linux(s64 t)
117{
118 struct timespec64 ts;
119 u64 abs_t;
120
121 /*
122 * Unfortunately can not use normal 64 bit division on 32 bit arch, but
123 * the alternative, do_div, does not work with negative numbers so have
124 * to special case them
125 */
126 if (t < 0) {
127 abs_t = -t;
128 ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
129 ts.tv_nsec = -ts.tv_nsec;
130 ts.tv_sec = -abs_t;
131 } else {
132 abs_t = t;
133 ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
134 ts.tv_sec = abs_t;
135 }
136
137 return ts;
138}
139
140static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
141{
142 s64 t = xdr_to_u64(xdr);
143
144 return yfs_time_to_linux(t);
145}
146
147static void yfs_check_req(struct afs_call *call, __be32 *bp)
148{
149 size_t len = (void *)bp - call->request;
150
151 if (len > call->request_size)
152 pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
153 call->type->name, len, call->request_size);
154 else if (len < call->request_size)
155 pr_warning("kAFS: %s: Request buffer underflow (%zu<%u)\n",
156 call->type->name, len, call->request_size);
157}
158
159/*
160 * Dump a bad file status record.
161 */
162static void xdr_dump_bad(const __be32 *bp)
163{
164 __be32 x[4];
165 int i;
166
167 pr_notice("YFS XDR: Bad status record\n");
168 for (i = 0; i < 5 * 4 * 4; i += 16) {
169 memcpy(x, bp, 16);
170 bp += 4;
171 pr_notice("%03x: %08x %08x %08x %08x\n",
172 i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
173 }
174
175 memcpy(x, bp, 4);
176 pr_notice("0x50: %08x\n", ntohl(x[0]));
177}
178
179/*
180 * Decode a YFSFetchStatus block
181 */
182static int xdr_decode_YFSFetchStatus(const __be32 **_bp,
183 struct afs_call *call,
184 struct afs_status_cb *scb)
185{
186 const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
187 struct afs_file_status *status = &scb->status;
188 u32 type;
189
190 status->abort_code = ntohl(xdr->abort_code);
191 if (status->abort_code != 0) {
192 if (status->abort_code == VNOVNODE)
193 status->nlink = 0;
194 scb->have_error = true;
195 return 0;
196 }
197
198 type = ntohl(xdr->type);
199 switch (type) {
200 case AFS_FTYPE_FILE:
201 case AFS_FTYPE_DIR:
202 case AFS_FTYPE_SYMLINK:
203 status->type = type;
204 break;
205 default:
206 goto bad;
207 }
208
209 status->nlink = ntohl(xdr->nlink);
210 status->author = xdr_to_u64(xdr->author);
211 status->owner = xdr_to_u64(xdr->owner);
212 status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
213 status->anon_access = ntohl(xdr->anon_access);
214 status->mode = ntohl(xdr->mode) & S_IALLUGO;
215 status->group = xdr_to_u64(xdr->group);
216 status->lock_count = ntohl(xdr->lock_count);
217
218 status->mtime_client = xdr_to_time(xdr->mtime_client);
219 status->mtime_server = xdr_to_time(xdr->mtime_server);
220 status->size = xdr_to_u64(xdr->size);
221 status->data_version = xdr_to_u64(xdr->data_version);
222 scb->have_status = true;
223
224 *_bp += xdr_size(xdr);
225 return 0;
226
227bad:
228 xdr_dump_bad(*_bp);
229 return afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
230}
231
232/*
233 * Decode a YFSCallBack block
234 */
235static void xdr_decode_YFSCallBack(const __be32 **_bp,
236 struct afs_call *call,
237 struct afs_status_cb *scb)
238{
239 struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
240 struct afs_callback *cb = &scb->callback;
241 ktime_t cb_expiry;
242
243 cb_expiry = call->reply_time;
244 cb_expiry = ktime_add(cb_expiry, xdr_to_u64(x->expiration_time) * 100);
245 cb->expires_at = ktime_divns(cb_expiry, NSEC_PER_SEC);
246 scb->have_cb = true;
247 *_bp += xdr_size(x);
248}
249
250/*
251 * Decode a YFSVolSync block
252 */
253static void xdr_decode_YFSVolSync(const __be32 **_bp,
254 struct afs_volsync *volsync)
255{
256 struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
257 u64 creation;
258
259 if (volsync) {
260 creation = xdr_to_u64(x->vol_creation_date);
261 do_div(creation, 10 * 1000 * 1000);
262 volsync->creation = creation;
263 }
264
265 *_bp += xdr_size(x);
266}
267
268/*
269 * Encode the requested attributes into a YFSStoreStatus block
270 */
271static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
272{
273 struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
274 s64 mtime = 0, owner = 0, group = 0;
275 u32 mask = 0, mode = 0;
276
277 mask = 0;
278 if (attr->ia_valid & ATTR_MTIME) {
279 mask |= AFS_SET_MTIME;
280 mtime = linux_to_yfs_time(&attr->ia_mtime);
281 }
282
283 if (attr->ia_valid & ATTR_UID) {
284 mask |= AFS_SET_OWNER;
285 owner = from_kuid(&init_user_ns, attr->ia_uid);
286 }
287
288 if (attr->ia_valid & ATTR_GID) {
289 mask |= AFS_SET_GROUP;
290 group = from_kgid(&init_user_ns, attr->ia_gid);
291 }
292
293 if (attr->ia_valid & ATTR_MODE) {
294 mask |= AFS_SET_MODE;
295 mode = attr->ia_mode & S_IALLUGO;
296 }
297
298 x->mask = htonl(mask);
299 x->mode = htonl(mode);
300 x->mtime_client = u64_to_xdr(mtime);
301 x->owner = u64_to_xdr(owner);
302 x->group = u64_to_xdr(group);
303 return bp + xdr_size(x);
304}
305
306/*
307 * Decode a YFSFetchVolumeStatus block.
308 */
309static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
310 struct afs_volume_status *vs)
311{
312 const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
313 u32 flags;
314
315 vs->vid = xdr_to_u64(x->vid);
316 vs->parent_id = xdr_to_u64(x->parent_id);
317 flags = ntohl(x->flags);
318 vs->online = flags & yfs_FVSOnline;
319 vs->in_service = flags & yfs_FVSInservice;
320 vs->blessed = flags & yfs_FVSBlessed;
321 vs->needs_salvage = flags & yfs_FVSNeedsSalvage;
322 vs->type = ntohl(x->type);
323 vs->min_quota = 0;
324 vs->max_quota = xdr_to_u64(x->max_quota);
325 vs->blocks_in_use = xdr_to_u64(x->blocks_in_use);
326 vs->part_blocks_avail = xdr_to_u64(x->part_blocks_avail);
327 vs->part_max_blocks = xdr_to_u64(x->part_max_blocks);
328 vs->vol_copy_date = xdr_to_u64(x->vol_copy_date);
329 vs->vol_backup_date = xdr_to_u64(x->vol_backup_date);
330 *_bp += sizeof(*x) / sizeof(__be32);
331}
332
333/*
334 * Deliver a reply that's a status, callback and volsync.
335 */
336static int yfs_deliver_fs_status_cb_and_volsync(struct afs_call *call)
337{
338 const __be32 *bp;
339 int ret;
340
341 ret = afs_transfer_reply(call);
342 if (ret < 0)
343 return ret;
344
345 /* unmarshall the reply once we've received all of it */
346 bp = call->buffer;
347 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
348 if (ret < 0)
349 return ret;
350 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
351 xdr_decode_YFSVolSync(&bp, call->out_volsync);
352
353 _leave(" = 0 [done]");
354 return 0;
355}
356
357/*
358 * Deliver reply data to operations that just return a file status and a volume
359 * sync record.
360 */
361static int yfs_deliver_status_and_volsync(struct afs_call *call)
362{
363 const __be32 *bp;
364 int ret;
365
366 ret = afs_transfer_reply(call);
367 if (ret < 0)
368 return ret;
369
370 bp = call->buffer;
371 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
372 if (ret < 0)
373 return ret;
374 xdr_decode_YFSVolSync(&bp, call->out_volsync);
375
376 _leave(" = 0 [done]");
377 return 0;
378}
379
380/*
381 * YFS.FetchStatus operation type
382 */
383static const struct afs_call_type yfs_RXYFSFetchStatus_vnode = {
384 .name = "YFS.FetchStatus(vnode)",
385 .op = yfs_FS_FetchStatus,
386 .deliver = yfs_deliver_fs_status_cb_and_volsync,
387 .destructor = afs_flat_call_destructor,
388};
389
390/*
391 * Fetch the status information for a file.
392 */
393int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
394 struct afs_volsync *volsync)
395{
396 struct afs_vnode *vnode = fc->vnode;
397 struct afs_call *call;
398 struct afs_net *net = afs_v2net(vnode);
399 __be32 *bp;
400
401 _enter(",%x,{%llx:%llu},,",
402 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
403
404 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus_vnode,
405 sizeof(__be32) * 2 +
406 sizeof(struct yfs_xdr_YFSFid),
407 sizeof(struct yfs_xdr_YFSFetchStatus) +
408 sizeof(struct yfs_xdr_YFSCallBack) +
409 sizeof(struct yfs_xdr_YFSVolSync));
410 if (!call) {
411 fc->ac.error = -ENOMEM;
412 return -ENOMEM;
413 }
414
415 call->key = fc->key;
416 call->out_scb = scb;
417 call->out_volsync = volsync;
418
419 /* marshall the parameters */
420 bp = call->request;
421 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
422 bp = xdr_encode_u32(bp, 0); /* RPC flags */
423 bp = xdr_encode_YFSFid(bp, &vnode->fid);
424 yfs_check_req(call, bp);
425
426 afs_use_fs_server(call, fc->cbi);
427 trace_afs_make_fs_call(call, &vnode->fid);
428 afs_set_fc_call(call, fc);
429 afs_make_call(&fc->ac, call, GFP_NOFS);
430 return afs_wait_for_call_to_complete(call, &fc->ac);
431}
432
433/*
434 * Deliver reply data to an YFS.FetchData64.
435 */
436static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
437{
438 struct afs_read *req = call->read_request;
439 const __be32 *bp;
440 unsigned int size;
441 int ret;
442
443 _enter("{%u,%zu/%llu}",
444 call->unmarshall, iov_iter_count(&call->iter), req->actual_len);
445
446 switch (call->unmarshall) {
447 case 0:
448 req->actual_len = 0;
449 req->index = 0;
450 req->offset = req->pos & (PAGE_SIZE - 1);
451 afs_extract_to_tmp64(call);
452 call->unmarshall++;
453 /* Fall through */
454
455 /* extract the returned data length */
456 case 1:
457 _debug("extract data length");
458 ret = afs_extract_data(call, true);
459 if (ret < 0)
460 return ret;
461
462 req->actual_len = be64_to_cpu(call->tmp64);
463 _debug("DATA length: %llu", req->actual_len);
464 req->remain = min(req->len, req->actual_len);
465 if (req->remain == 0)
466 goto no_more_data;
467
468 call->unmarshall++;
469
470 begin_page:
471 ASSERTCMP(req->index, <, req->nr_pages);
472 if (req->remain > PAGE_SIZE - req->offset)
473 size = PAGE_SIZE - req->offset;
474 else
475 size = req->remain;
476 call->bvec[0].bv_len = size;
477 call->bvec[0].bv_offset = req->offset;
478 call->bvec[0].bv_page = req->pages[req->index];
479 iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
480 ASSERTCMP(size, <=, PAGE_SIZE);
481 /* Fall through */
482
483 /* extract the returned data */
484 case 2:
485 _debug("extract data %zu/%llu",
486 iov_iter_count(&call->iter), req->remain);
487
488 ret = afs_extract_data(call, true);
489 if (ret < 0)
490 return ret;
491 req->remain -= call->bvec[0].bv_len;
492 req->offset += call->bvec[0].bv_len;
493 ASSERTCMP(req->offset, <=, PAGE_SIZE);
494 if (req->offset == PAGE_SIZE) {
495 req->offset = 0;
496 if (req->page_done)
497 req->page_done(req);
498 req->index++;
499 if (req->remain > 0)
500 goto begin_page;
501 }
502
503 ASSERTCMP(req->remain, ==, 0);
504 if (req->actual_len <= req->len)
505 goto no_more_data;
506
507 /* Discard any excess data the server gave us */
508 afs_extract_discard(call, req->actual_len - req->len);
509 call->unmarshall = 3;
510 /* Fall through */
511
512 case 3:
513 _debug("extract discard %zu/%llu",
514 iov_iter_count(&call->iter), req->actual_len - req->len);
515
516 ret = afs_extract_data(call, true);
517 if (ret < 0)
518 return ret;
519
520 no_more_data:
521 call->unmarshall = 4;
522 afs_extract_to_buf(call,
523 sizeof(struct yfs_xdr_YFSFetchStatus) +
524 sizeof(struct yfs_xdr_YFSCallBack) +
525 sizeof(struct yfs_xdr_YFSVolSync));
526 /* Fall through */
527
528 /* extract the metadata */
529 case 4:
530 ret = afs_extract_data(call, false);
531 if (ret < 0)
532 return ret;
533
534 bp = call->buffer;
535 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
536 if (ret < 0)
537 return ret;
538 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
539 xdr_decode_YFSVolSync(&bp, call->out_volsync);
540
541 req->data_version = call->out_scb->status.data_version;
542 req->file_size = call->out_scb->status.size;
543
544 call->unmarshall++;
545 /* Fall through */
546
547 case 5:
548 break;
549 }
550
551 for (; req->index < req->nr_pages; req->index++) {
552 if (req->offset < PAGE_SIZE)
553 zero_user_segment(req->pages[req->index],
554 req->offset, PAGE_SIZE);
555 if (req->page_done)
556 req->page_done(req);
557 req->offset = 0;
558 }
559
560 _leave(" = 0 [done]");
561 return 0;
562}
563
564static void yfs_fetch_data_destructor(struct afs_call *call)
565{
566 afs_put_read(call->read_request);
567 afs_flat_call_destructor(call);
568}
569
570/*
571 * YFS.FetchData64 operation type
572 */
573static const struct afs_call_type yfs_RXYFSFetchData64 = {
574 .name = "YFS.FetchData64",
575 .op = yfs_FS_FetchData64,
576 .deliver = yfs_deliver_fs_fetch_data64,
577 .destructor = yfs_fetch_data_destructor,
578};
579
580/*
581 * Fetch data from a file.
582 */
583int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
584 struct afs_read *req)
585{
586 struct afs_vnode *vnode = fc->vnode;
587 struct afs_call *call;
588 struct afs_net *net = afs_v2net(vnode);
589 __be32 *bp;
590
591 _enter(",%x,{%llx:%llu},%llx,%llx",
592 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode,
593 req->pos, req->len);
594
595 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchData64,
596 sizeof(__be32) * 2 +
597 sizeof(struct yfs_xdr_YFSFid) +
598 sizeof(struct yfs_xdr_u64) * 2,
599 sizeof(struct yfs_xdr_YFSFetchStatus) +
600 sizeof(struct yfs_xdr_YFSCallBack) +
601 sizeof(struct yfs_xdr_YFSVolSync));
602 if (!call)
603 return -ENOMEM;
604
605 call->key = fc->key;
606 call->out_scb = scb;
607 call->out_volsync = NULL;
608 call->read_request = req;
609
610 /* marshall the parameters */
611 bp = call->request;
612 bp = xdr_encode_u32(bp, YFSFETCHDATA64);
613 bp = xdr_encode_u32(bp, 0); /* RPC flags */
614 bp = xdr_encode_YFSFid(bp, &vnode->fid);
615 bp = xdr_encode_u64(bp, req->pos);
616 bp = xdr_encode_u64(bp, req->len);
617 yfs_check_req(call, bp);
618
619 refcount_inc(&req->usage);
620 afs_use_fs_server(call, fc->cbi);
621 trace_afs_make_fs_call(call, &vnode->fid);
622 afs_set_fc_call(call, fc);
623 afs_make_call(&fc->ac, call, GFP_NOFS);
624 return afs_wait_for_call_to_complete(call, &fc->ac);
625}
626
627/*
628 * Deliver reply data for YFS.CreateFile or YFS.MakeDir.
629 */
630static int yfs_deliver_fs_create_vnode(struct afs_call *call)
631{
632 const __be32 *bp;
633 int ret;
634
635 _enter("{%u}", call->unmarshall);
636
637 ret = afs_transfer_reply(call);
638 if (ret < 0)
639 return ret;
640
641 /* unmarshall the reply once we've received all of it */
642 bp = call->buffer;
643 xdr_decode_YFSFid(&bp, call->out_fid);
644 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
645 if (ret < 0)
646 return ret;
647 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
648 if (ret < 0)
649 return ret;
650 xdr_decode_YFSCallBack(&bp, call, call->out_scb);
651 xdr_decode_YFSVolSync(&bp, call->out_volsync);
652
653 _leave(" = 0 [done]");
654 return 0;
655}
656
657/*
658 * FS.CreateFile and FS.MakeDir operation type
659 */
660static const struct afs_call_type afs_RXFSCreateFile = {
661 .name = "YFS.CreateFile",
662 .op = yfs_FS_CreateFile,
663 .deliver = yfs_deliver_fs_create_vnode,
664 .destructor = afs_flat_call_destructor,
665};
666
667/*
668 * Create a file.
669 */
670int yfs_fs_create_file(struct afs_fs_cursor *fc,
671 const char *name,
672 umode_t mode,
673 struct afs_status_cb *dvnode_scb,
674 struct afs_fid *newfid,
675 struct afs_status_cb *new_scb)
676{
677 struct afs_vnode *dvnode = fc->vnode;
678 struct afs_call *call;
679 struct afs_net *net = afs_v2net(dvnode);
680 size_t namesz, reqsz, rplsz;
681 __be32 *bp;
682
683 _enter("");
684
685 namesz = strlen(name);
686 reqsz = (sizeof(__be32) +
687 sizeof(__be32) +
688 sizeof(struct yfs_xdr_YFSFid) +
689 xdr_strlen(namesz) +
690 sizeof(struct yfs_xdr_YFSStoreStatus) +
691 sizeof(__be32));
692 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
693 sizeof(struct yfs_xdr_YFSFetchStatus) +
694 sizeof(struct yfs_xdr_YFSFetchStatus) +
695 sizeof(struct yfs_xdr_YFSCallBack) +
696 sizeof(struct yfs_xdr_YFSVolSync));
697
698 call = afs_alloc_flat_call(net, &afs_RXFSCreateFile, reqsz, rplsz);
699 if (!call)
700 return -ENOMEM;
701
702 call->key = fc->key;
703 call->out_dir_scb = dvnode_scb;
704 call->out_fid = newfid;
705 call->out_scb = new_scb;
706
707 /* marshall the parameters */
708 bp = call->request;
709 bp = xdr_encode_u32(bp, YFSCREATEFILE);
710 bp = xdr_encode_u32(bp, 0); /* RPC flags */
711 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
712 bp = xdr_encode_string(bp, name, namesz);
713 bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
714 bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
715 yfs_check_req(call, bp);
716
717 afs_use_fs_server(call, fc->cbi);
718 trace_afs_make_fs_call1(call, &dvnode->fid, name);
719 afs_set_fc_call(call, fc);
720 afs_make_call(&fc->ac, call, GFP_NOFS);
721 return afs_wait_for_call_to_complete(call, &fc->ac);
722}
723
724static const struct afs_call_type yfs_RXFSMakeDir = {
725 .name = "YFS.MakeDir",
726 .op = yfs_FS_MakeDir,
727 .deliver = yfs_deliver_fs_create_vnode,
728 .destructor = afs_flat_call_destructor,
729};
730
731/*
732 * Make a directory.
733 */
734int yfs_fs_make_dir(struct afs_fs_cursor *fc,
735 const char *name,
736 umode_t mode,
737 struct afs_status_cb *dvnode_scb,
738 struct afs_fid *newfid,
739 struct afs_status_cb *new_scb)
740{
741 struct afs_vnode *dvnode = fc->vnode;
742 struct afs_call *call;
743 struct afs_net *net = afs_v2net(dvnode);
744 size_t namesz, reqsz, rplsz;
745 __be32 *bp;
746
747 _enter("");
748
749 namesz = strlen(name);
750 reqsz = (sizeof(__be32) +
751 sizeof(struct yfs_xdr_RPCFlags) +
752 sizeof(struct yfs_xdr_YFSFid) +
753 xdr_strlen(namesz) +
754 sizeof(struct yfs_xdr_YFSStoreStatus));
755 rplsz = (sizeof(struct yfs_xdr_YFSFid) +
756 sizeof(struct yfs_xdr_YFSFetchStatus) +
757 sizeof(struct yfs_xdr_YFSFetchStatus) +
758 sizeof(struct yfs_xdr_YFSCallBack) +
759 sizeof(struct yfs_xdr_YFSVolSync));
760
761 call = afs_alloc_flat_call(net, &yfs_RXFSMakeDir, reqsz, rplsz);
762 if (!call)
763 return -ENOMEM;
764
765 call->key = fc->key;
766 call->out_dir_scb = dvnode_scb;
767 call->out_fid = newfid;
768 call->out_scb = new_scb;
769
770 /* marshall the parameters */
771 bp = call->request;
772 bp = xdr_encode_u32(bp, YFSMAKEDIR);
773 bp = xdr_encode_u32(bp, 0); /* RPC flags */
774 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
775 bp = xdr_encode_string(bp, name, namesz);
776 bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
777 yfs_check_req(call, bp);
778
779 afs_use_fs_server(call, fc->cbi);
780 trace_afs_make_fs_call1(call, &dvnode->fid, name);
781 afs_set_fc_call(call, fc);
782 afs_make_call(&fc->ac, call, GFP_NOFS);
783 return afs_wait_for_call_to_complete(call, &fc->ac);
784}
785
786/*
787 * Deliver reply data to a YFS.RemoveFile2 operation.
788 */
789static int yfs_deliver_fs_remove_file2(struct afs_call *call)
790{
791 struct afs_fid fid;
792 const __be32 *bp;
793 int ret;
794
795 _enter("{%u}", call->unmarshall);
796
797 ret = afs_transfer_reply(call);
798 if (ret < 0)
799 return ret;
800
801 bp = call->buffer;
802 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
803 if (ret < 0)
804 return ret;
805
806 xdr_decode_YFSFid(&bp, &fid);
807 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
808 if (ret < 0)
809 return ret;
810 /* Was deleted if vnode->status.abort_code == VNOVNODE. */
811
812 xdr_decode_YFSVolSync(&bp, call->out_volsync);
813 return 0;
814}
815
816/*
817 * YFS.RemoveFile2 operation type.
818 */
819static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
820 .name = "YFS.RemoveFile2",
821 .op = yfs_FS_RemoveFile2,
822 .deliver = yfs_deliver_fs_remove_file2,
823 .destructor = afs_flat_call_destructor,
824};
825
826/*
827 * Remove a file and retrieve new file status.
828 */
829int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
830 const char *name, struct afs_status_cb *dvnode_scb,
831 struct afs_status_cb *vnode_scb)
832{
833 struct afs_vnode *dvnode = fc->vnode;
834 struct afs_call *call;
835 struct afs_net *net = afs_v2net(dvnode);
836 size_t namesz;
837 __be32 *bp;
838
839 _enter("");
840
841 namesz = strlen(name);
842
843 call = afs_alloc_flat_call(net, &yfs_RXYFSRemoveFile2,
844 sizeof(__be32) +
845 sizeof(struct yfs_xdr_RPCFlags) +
846 sizeof(struct yfs_xdr_YFSFid) +
847 xdr_strlen(namesz),
848 sizeof(struct yfs_xdr_YFSFetchStatus) +
849 sizeof(struct yfs_xdr_YFSFid) +
850 sizeof(struct yfs_xdr_YFSFetchStatus) +
851 sizeof(struct yfs_xdr_YFSVolSync));
852 if (!call)
853 return -ENOMEM;
854
855 call->key = fc->key;
856 call->out_dir_scb = dvnode_scb;
857 call->out_scb = vnode_scb;
858
859 /* marshall the parameters */
860 bp = call->request;
861 bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
862 bp = xdr_encode_u32(bp, 0); /* RPC flags */
863 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
864 bp = xdr_encode_string(bp, name, namesz);
865 yfs_check_req(call, bp);
866
867 afs_use_fs_server(call, fc->cbi);
868 trace_afs_make_fs_call1(call, &dvnode->fid, name);
869 afs_set_fc_call(call, fc);
870 afs_make_call(&fc->ac, call, GFP_NOFS);
871 return afs_wait_for_call_to_complete(call, &fc->ac);
872}
873
874/*
875 * Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
876 */
877static int yfs_deliver_fs_remove(struct afs_call *call)
878{
879 const __be32 *bp;
880 int ret;
881
882 _enter("{%u}", call->unmarshall);
883
884 ret = afs_transfer_reply(call);
885 if (ret < 0)
886 return ret;
887
888 bp = call->buffer;
889 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
890 if (ret < 0)
891 return ret;
892
893 xdr_decode_YFSVolSync(&bp, call->out_volsync);
894 return 0;
895}
896
897/*
898 * FS.RemoveDir and FS.RemoveFile operation types.
899 */
900static const struct afs_call_type yfs_RXYFSRemoveFile = {
901 .name = "YFS.RemoveFile",
902 .op = yfs_FS_RemoveFile,
903 .deliver = yfs_deliver_fs_remove,
904 .destructor = afs_flat_call_destructor,
905};
906
907static const struct afs_call_type yfs_RXYFSRemoveDir = {
908 .name = "YFS.RemoveDir",
909 .op = yfs_FS_RemoveDir,
910 .deliver = yfs_deliver_fs_remove,
911 .destructor = afs_flat_call_destructor,
912};
913
914/*
915 * remove a file or directory
916 */
917int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
918 const char *name, bool isdir,
919 struct afs_status_cb *dvnode_scb)
920{
921 struct afs_vnode *dvnode = fc->vnode;
922 struct afs_call *call;
923 struct afs_net *net = afs_v2net(dvnode);
924 size_t namesz;
925 __be32 *bp;
926
927 _enter("");
928
929 namesz = strlen(name);
930 call = afs_alloc_flat_call(
931 net, isdir ? &yfs_RXYFSRemoveDir : &yfs_RXYFSRemoveFile,
932 sizeof(__be32) +
933 sizeof(struct yfs_xdr_RPCFlags) +
934 sizeof(struct yfs_xdr_YFSFid) +
935 xdr_strlen(namesz),
936 sizeof(struct yfs_xdr_YFSFetchStatus) +
937 sizeof(struct yfs_xdr_YFSVolSync));
938 if (!call)
939 return -ENOMEM;
940
941 call->key = fc->key;
942 call->out_dir_scb = dvnode_scb;
943
944 /* marshall the parameters */
945 bp = call->request;
946 bp = xdr_encode_u32(bp, isdir ? YFSREMOVEDIR : YFSREMOVEFILE);
947 bp = xdr_encode_u32(bp, 0); /* RPC flags */
948 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
949 bp = xdr_encode_string(bp, name, namesz);
950 yfs_check_req(call, bp);
951
952 afs_use_fs_server(call, fc->cbi);
953 trace_afs_make_fs_call1(call, &dvnode->fid, name);
954 afs_set_fc_call(call, fc);
955 afs_make_call(&fc->ac, call, GFP_NOFS);
956 return afs_wait_for_call_to_complete(call, &fc->ac);
957}
958
959/*
960 * Deliver reply data to a YFS.Link operation.
961 */
962static int yfs_deliver_fs_link(struct afs_call *call)
963{
964 const __be32 *bp;
965 int ret;
966
967 _enter("{%u}", call->unmarshall);
968
969 ret = afs_transfer_reply(call);
970 if (ret < 0)
971 return ret;
972
973 bp = call->buffer;
974 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
975 if (ret < 0)
976 return ret;
977 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
978 if (ret < 0)
979 return ret;
980 xdr_decode_YFSVolSync(&bp, call->out_volsync);
981 _leave(" = 0 [done]");
982 return 0;
983}
984
985/*
986 * YFS.Link operation type.
987 */
988static const struct afs_call_type yfs_RXYFSLink = {
989 .name = "YFS.Link",
990 .op = yfs_FS_Link,
991 .deliver = yfs_deliver_fs_link,
992 .destructor = afs_flat_call_destructor,
993};
994
995/*
996 * Make a hard link.
997 */
998int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
999 const char *name,
1000 struct afs_status_cb *dvnode_scb,
1001 struct afs_status_cb *vnode_scb)
1002{
1003 struct afs_vnode *dvnode = fc->vnode;
1004 struct afs_call *call;
1005 struct afs_net *net = afs_v2net(vnode);
1006 size_t namesz;
1007 __be32 *bp;
1008
1009 _enter("");
1010
1011 namesz = strlen(name);
1012 call = afs_alloc_flat_call(net, &yfs_RXYFSLink,
1013 sizeof(__be32) +
1014 sizeof(struct yfs_xdr_RPCFlags) +
1015 sizeof(struct yfs_xdr_YFSFid) +
1016 xdr_strlen(namesz) +
1017 sizeof(struct yfs_xdr_YFSFid),
1018 sizeof(struct yfs_xdr_YFSFetchStatus) +
1019 sizeof(struct yfs_xdr_YFSFetchStatus) +
1020 sizeof(struct yfs_xdr_YFSVolSync));
1021 if (!call)
1022 return -ENOMEM;
1023
1024 call->key = fc->key;
1025 call->out_dir_scb = dvnode_scb;
1026 call->out_scb = vnode_scb;
1027
1028 /* marshall the parameters */
1029 bp = call->request;
1030 bp = xdr_encode_u32(bp, YFSLINK);
1031 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1032 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1033 bp = xdr_encode_string(bp, name, namesz);
1034 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1035 yfs_check_req(call, bp);
1036
1037 afs_use_fs_server(call, fc->cbi);
1038 trace_afs_make_fs_call1(call, &vnode->fid, name);
1039 afs_set_fc_call(call, fc);
1040 afs_make_call(&fc->ac, call, GFP_NOFS);
1041 return afs_wait_for_call_to_complete(call, &fc->ac);
1042}
1043
1044/*
1045 * Deliver reply data to a YFS.Symlink operation.
1046 */
1047static int yfs_deliver_fs_symlink(struct afs_call *call)
1048{
1049 const __be32 *bp;
1050 int ret;
1051
1052 _enter("{%u}", call->unmarshall);
1053
1054 ret = afs_transfer_reply(call);
1055 if (ret < 0)
1056 return ret;
1057
1058 /* unmarshall the reply once we've received all of it */
1059 bp = call->buffer;
1060 xdr_decode_YFSFid(&bp, call->out_fid);
1061 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
1062 if (ret < 0)
1063 return ret;
1064 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
1065 if (ret < 0)
1066 return ret;
1067 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1068
1069 _leave(" = 0 [done]");
1070 return 0;
1071}
1072
1073/*
1074 * YFS.Symlink operation type
1075 */
1076static const struct afs_call_type yfs_RXYFSSymlink = {
1077 .name = "YFS.Symlink",
1078 .op = yfs_FS_Symlink,
1079 .deliver = yfs_deliver_fs_symlink,
1080 .destructor = afs_flat_call_destructor,
1081};
1082
1083/*
1084 * Create a symbolic link.
1085 */
1086int yfs_fs_symlink(struct afs_fs_cursor *fc,
1087 const char *name,
1088 const char *contents,
1089 struct afs_status_cb *dvnode_scb,
1090 struct afs_fid *newfid,
1091 struct afs_status_cb *vnode_scb)
1092{
1093 struct afs_vnode *dvnode = fc->vnode;
1094 struct afs_call *call;
1095 struct afs_net *net = afs_v2net(dvnode);
1096 size_t namesz, contents_sz;
1097 __be32 *bp;
1098
1099 _enter("");
1100
1101 namesz = strlen(name);
1102 contents_sz = strlen(contents);
1103 call = afs_alloc_flat_call(net, &yfs_RXYFSSymlink,
1104 sizeof(__be32) +
1105 sizeof(struct yfs_xdr_RPCFlags) +
1106 sizeof(struct yfs_xdr_YFSFid) +
1107 xdr_strlen(namesz) +
1108 xdr_strlen(contents_sz) +
1109 sizeof(struct yfs_xdr_YFSStoreStatus),
1110 sizeof(struct yfs_xdr_YFSFid) +
1111 sizeof(struct yfs_xdr_YFSFetchStatus) +
1112 sizeof(struct yfs_xdr_YFSFetchStatus) +
1113 sizeof(struct yfs_xdr_YFSVolSync));
1114 if (!call)
1115 return -ENOMEM;
1116
1117 call->key = fc->key;
1118 call->out_dir_scb = dvnode_scb;
1119 call->out_fid = newfid;
1120 call->out_scb = vnode_scb;
1121
1122 /* marshall the parameters */
1123 bp = call->request;
1124 bp = xdr_encode_u32(bp, YFSSYMLINK);
1125 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1126 bp = xdr_encode_YFSFid(bp, &dvnode->fid);
1127 bp = xdr_encode_string(bp, name, namesz);
1128 bp = xdr_encode_string(bp, contents, contents_sz);
1129 bp = xdr_encode_YFSStoreStatus_mode(bp, S_IRWXUGO);
1130 yfs_check_req(call, bp);
1131
1132 afs_use_fs_server(call, fc->cbi);
1133 trace_afs_make_fs_call1(call, &dvnode->fid, name);
1134 afs_set_fc_call(call, fc);
1135 afs_make_call(&fc->ac, call, GFP_NOFS);
1136 return afs_wait_for_call_to_complete(call, &fc->ac);
1137}
1138
1139/*
1140 * Deliver reply data to a YFS.Rename operation.
1141 */
1142static int yfs_deliver_fs_rename(struct afs_call *call)
1143{
1144 const __be32 *bp;
1145 int ret;
1146
1147 _enter("{%u}", call->unmarshall);
1148
1149 ret = afs_transfer_reply(call);
1150 if (ret < 0)
1151 return ret;
1152
1153 bp = call->buffer;
1154 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
1155 if (ret < 0)
1156 return ret;
1157 if (call->out_dir_scb != call->out_scb) {
1158 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
1159 if (ret < 0)
1160 return ret;
1161 }
1162
1163 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1164 _leave(" = 0 [done]");
1165 return 0;
1166}
1167
1168/*
1169 * YFS.Rename operation type
1170 */
1171static const struct afs_call_type yfs_RXYFSRename = {
1172 .name = "FS.Rename",
1173 .op = yfs_FS_Rename,
1174 .deliver = yfs_deliver_fs_rename,
1175 .destructor = afs_flat_call_destructor,
1176};
1177
1178/*
1179 * Rename a file or directory.
1180 */
1181int yfs_fs_rename(struct afs_fs_cursor *fc,
1182 const char *orig_name,
1183 struct afs_vnode *new_dvnode,
1184 const char *new_name,
1185 struct afs_status_cb *orig_dvnode_scb,
1186 struct afs_status_cb *new_dvnode_scb)
1187{
1188 struct afs_vnode *orig_dvnode = fc->vnode;
1189 struct afs_call *call;
1190 struct afs_net *net = afs_v2net(orig_dvnode);
1191 size_t o_namesz, n_namesz;
1192 __be32 *bp;
1193
1194 _enter("");
1195
1196 o_namesz = strlen(orig_name);
1197 n_namesz = strlen(new_name);
1198 call = afs_alloc_flat_call(net, &yfs_RXYFSRename,
1199 sizeof(__be32) +
1200 sizeof(struct yfs_xdr_RPCFlags) +
1201 sizeof(struct yfs_xdr_YFSFid) +
1202 xdr_strlen(o_namesz) +
1203 sizeof(struct yfs_xdr_YFSFid) +
1204 xdr_strlen(n_namesz),
1205 sizeof(struct yfs_xdr_YFSFetchStatus) +
1206 sizeof(struct yfs_xdr_YFSFetchStatus) +
1207 sizeof(struct yfs_xdr_YFSVolSync));
1208 if (!call)
1209 return -ENOMEM;
1210
1211 call->key = fc->key;
1212 call->out_dir_scb = orig_dvnode_scb;
1213 call->out_scb = new_dvnode_scb;
1214
1215 /* marshall the parameters */
1216 bp = call->request;
1217 bp = xdr_encode_u32(bp, YFSRENAME);
1218 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1219 bp = xdr_encode_YFSFid(bp, &orig_dvnode->fid);
1220 bp = xdr_encode_string(bp, orig_name, o_namesz);
1221 bp = xdr_encode_YFSFid(bp, &new_dvnode->fid);
1222 bp = xdr_encode_string(bp, new_name, n_namesz);
1223 yfs_check_req(call, bp);
1224
1225 afs_use_fs_server(call, fc->cbi);
1226 trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
1227 afs_set_fc_call(call, fc);
1228 afs_make_call(&fc->ac, call, GFP_NOFS);
1229 return afs_wait_for_call_to_complete(call, &fc->ac);
1230}
1231
1232/*
1233 * YFS.StoreData64 operation type.
1234 */
1235static const struct afs_call_type yfs_RXYFSStoreData64 = {
1236 .name = "YFS.StoreData64",
1237 .op = yfs_FS_StoreData64,
1238 .deliver = yfs_deliver_status_and_volsync,
1239 .destructor = afs_flat_call_destructor,
1240};
1241
1242/*
1243 * Store a set of pages to a large file.
1244 */
1245int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
1246 pgoff_t first, pgoff_t last,
1247 unsigned offset, unsigned to,
1248 struct afs_status_cb *scb)
1249{
1250 struct afs_vnode *vnode = fc->vnode;
1251 struct afs_call *call;
1252 struct afs_net *net = afs_v2net(vnode);
1253 loff_t size, pos, i_size;
1254 __be32 *bp;
1255
1256 _enter(",%x,{%llx:%llu},,",
1257 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1258
1259 size = (loff_t)to - (loff_t)offset;
1260 if (first != last)
1261 size += (loff_t)(last - first) << PAGE_SHIFT;
1262 pos = (loff_t)first << PAGE_SHIFT;
1263 pos += offset;
1264
1265 i_size = i_size_read(&vnode->vfs_inode);
1266 if (pos + size > i_size)
1267 i_size = size + pos;
1268
1269 _debug("size %llx, at %llx, i_size %llx",
1270 (unsigned long long)size, (unsigned long long)pos,
1271 (unsigned long long)i_size);
1272
1273 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64,
1274 sizeof(__be32) +
1275 sizeof(__be32) +
1276 sizeof(struct yfs_xdr_YFSFid) +
1277 sizeof(struct yfs_xdr_YFSStoreStatus) +
1278 sizeof(struct yfs_xdr_u64) * 3,
1279 sizeof(struct yfs_xdr_YFSFetchStatus) +
1280 sizeof(struct yfs_xdr_YFSVolSync));
1281 if (!call)
1282 return -ENOMEM;
1283
1284 call->key = fc->key;
1285 call->mapping = mapping;
1286 call->first = first;
1287 call->last = last;
1288 call->first_offset = offset;
1289 call->last_to = to;
1290 call->send_pages = true;
1291 call->out_scb = scb;
1292
1293 /* marshall the parameters */
1294 bp = call->request;
1295 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1296 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1297 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1298 bp = xdr_encode_YFSStoreStatus_mtime(bp, &vnode->vfs_inode.i_mtime);
1299 bp = xdr_encode_u64(bp, pos);
1300 bp = xdr_encode_u64(bp, size);
1301 bp = xdr_encode_u64(bp, i_size);
1302 yfs_check_req(call, bp);
1303
1304 afs_use_fs_server(call, fc->cbi);
1305 trace_afs_make_fs_call(call, &vnode->fid);
1306 afs_set_fc_call(call, fc);
1307 afs_make_call(&fc->ac, call, GFP_NOFS);
1308 return afs_wait_for_call_to_complete(call, &fc->ac);
1309}
1310
1311/*
1312 * YFS.StoreStatus operation type
1313 */
1314static const struct afs_call_type yfs_RXYFSStoreStatus = {
1315 .name = "YFS.StoreStatus",
1316 .op = yfs_FS_StoreStatus,
1317 .deliver = yfs_deliver_status_and_volsync,
1318 .destructor = afs_flat_call_destructor,
1319};
1320
1321static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
1322 .name = "YFS.StoreData64",
1323 .op = yfs_FS_StoreData64,
1324 .deliver = yfs_deliver_status_and_volsync,
1325 .destructor = afs_flat_call_destructor,
1326};
1327
1328/*
1329 * Set the attributes on a file, using YFS.StoreData64 rather than
1330 * YFS.StoreStatus so as to alter the file size also.
1331 */
1332static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr,
1333 struct afs_status_cb *scb)
1334{
1335 struct afs_vnode *vnode = fc->vnode;
1336 struct afs_call *call;
1337 struct afs_net *net = afs_v2net(vnode);
1338 __be32 *bp;
1339
1340 _enter(",%x,{%llx:%llu},,",
1341 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1342
1343 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreData64_as_Status,
1344 sizeof(__be32) * 2 +
1345 sizeof(struct yfs_xdr_YFSFid) +
1346 sizeof(struct yfs_xdr_YFSStoreStatus) +
1347 sizeof(struct yfs_xdr_u64) * 3,
1348 sizeof(struct yfs_xdr_YFSFetchStatus) +
1349 sizeof(struct yfs_xdr_YFSVolSync));
1350 if (!call)
1351 return -ENOMEM;
1352
1353 call->key = fc->key;
1354 call->out_scb = scb;
1355
1356 /* marshall the parameters */
1357 bp = call->request;
1358 bp = xdr_encode_u32(bp, YFSSTOREDATA64);
1359 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1360 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1361 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1362 bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
1363 bp = xdr_encode_u64(bp, 0); /* size of write */
1364 bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
1365 yfs_check_req(call, bp);
1366
1367 afs_use_fs_server(call, fc->cbi);
1368 trace_afs_make_fs_call(call, &vnode->fid);
1369 afs_set_fc_call(call, fc);
1370 afs_make_call(&fc->ac, call, GFP_NOFS);
1371 return afs_wait_for_call_to_complete(call, &fc->ac);
1372}
1373
1374/*
1375 * Set the attributes on a file, using YFS.StoreData64 if there's a change in
1376 * file size, and YFS.StoreStatus otherwise.
1377 */
1378int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr,
1379 struct afs_status_cb *scb)
1380{
1381 struct afs_vnode *vnode = fc->vnode;
1382 struct afs_call *call;
1383 struct afs_net *net = afs_v2net(vnode);
1384 __be32 *bp;
1385
1386 if (attr->ia_valid & ATTR_SIZE)
1387 return yfs_fs_setattr_size(fc, attr, scb);
1388
1389 _enter(",%x,{%llx:%llu},,",
1390 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
1391
1392 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreStatus,
1393 sizeof(__be32) * 2 +
1394 sizeof(struct yfs_xdr_YFSFid) +
1395 sizeof(struct yfs_xdr_YFSStoreStatus),
1396 sizeof(struct yfs_xdr_YFSFetchStatus) +
1397 sizeof(struct yfs_xdr_YFSVolSync));
1398 if (!call)
1399 return -ENOMEM;
1400
1401 call->key = fc->key;
1402 call->out_scb = scb;
1403
1404 /* marshall the parameters */
1405 bp = call->request;
1406 bp = xdr_encode_u32(bp, YFSSTORESTATUS);
1407 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1408 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1409 bp = xdr_encode_YFS_StoreStatus(bp, attr);
1410 yfs_check_req(call, bp);
1411
1412 afs_use_fs_server(call, fc->cbi);
1413 trace_afs_make_fs_call(call, &vnode->fid);
1414 afs_set_fc_call(call, fc);
1415 afs_make_call(&fc->ac, call, GFP_NOFS);
1416 return afs_wait_for_call_to_complete(call, &fc->ac);
1417}
1418
1419/*
1420 * Deliver reply data to a YFS.GetVolumeStatus operation.
1421 */
1422static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
1423{
1424 const __be32 *bp;
1425 char *p;
1426 u32 size;
1427 int ret;
1428
1429 _enter("{%u}", call->unmarshall);
1430
1431 switch (call->unmarshall) {
1432 case 0:
1433 call->unmarshall++;
1434 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
1435 /* Fall through */
1436
1437 /* extract the returned status record */
1438 case 1:
1439 _debug("extract status");
1440 ret = afs_extract_data(call, true);
1441 if (ret < 0)
1442 return ret;
1443
1444 bp = call->buffer;
1445 xdr_decode_YFSFetchVolumeStatus(&bp, call->out_volstatus);
1446 call->unmarshall++;
1447 afs_extract_to_tmp(call);
1448 /* Fall through */
1449
1450 /* extract the volume name length */
1451 case 2:
1452 ret = afs_extract_data(call, true);
1453 if (ret < 0)
1454 return ret;
1455
1456 call->count = ntohl(call->tmp);
1457 _debug("volname length: %u", call->count);
1458 if (call->count >= AFSNAMEMAX)
1459 return afs_protocol_error(call, -EBADMSG,
1460 afs_eproto_volname_len);
1461 size = (call->count + 3) & ~3; /* It's padded */
1462 afs_extract_to_buf(call, size);
1463 call->unmarshall++;
1464 /* Fall through */
1465
1466 /* extract the volume name */
1467 case 3:
1468 _debug("extract volname");
1469 ret = afs_extract_data(call, true);
1470 if (ret < 0)
1471 return ret;
1472
1473 p = call->buffer;
1474 p[call->count] = 0;
1475 _debug("volname '%s'", p);
1476 afs_extract_to_tmp(call);
1477 call->unmarshall++;
1478 /* Fall through */
1479
1480 /* extract the offline message length */
1481 case 4:
1482 ret = afs_extract_data(call, true);
1483 if (ret < 0)
1484 return ret;
1485
1486 call->count = ntohl(call->tmp);
1487 _debug("offline msg length: %u", call->count);
1488 if (call->count >= AFSNAMEMAX)
1489 return afs_protocol_error(call, -EBADMSG,
1490 afs_eproto_offline_msg_len);
1491 size = (call->count + 3) & ~3; /* It's padded */
1492 afs_extract_to_buf(call, size);
1493 call->unmarshall++;
1494 /* Fall through */
1495
1496 /* extract the offline message */
1497 case 5:
1498 _debug("extract offline");
1499 ret = afs_extract_data(call, true);
1500 if (ret < 0)
1501 return ret;
1502
1503 p = call->buffer;
1504 p[call->count] = 0;
1505 _debug("offline '%s'", p);
1506
1507 afs_extract_to_tmp(call);
1508 call->unmarshall++;
1509 /* Fall through */
1510
1511 /* extract the message of the day length */
1512 case 6:
1513 ret = afs_extract_data(call, true);
1514 if (ret < 0)
1515 return ret;
1516
1517 call->count = ntohl(call->tmp);
1518 _debug("motd length: %u", call->count);
1519 if (call->count >= AFSNAMEMAX)
1520 return afs_protocol_error(call, -EBADMSG,
1521 afs_eproto_motd_len);
1522 size = (call->count + 3) & ~3; /* It's padded */
1523 afs_extract_to_buf(call, size);
1524 call->unmarshall++;
1525 /* Fall through */
1526
1527 /* extract the message of the day */
1528 case 7:
1529 _debug("extract motd");
1530 ret = afs_extract_data(call, false);
1531 if (ret < 0)
1532 return ret;
1533
1534 p = call->buffer;
1535 p[call->count] = 0;
1536 _debug("motd '%s'", p);
1537
1538 call->unmarshall++;
1539 /* Fall through */
1540
1541 case 8:
1542 break;
1543 }
1544
1545 _leave(" = 0 [done]");
1546 return 0;
1547}
1548
1549/*
1550 * YFS.GetVolumeStatus operation type
1551 */
1552static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
1553 .name = "YFS.GetVolumeStatus",
1554 .op = yfs_FS_GetVolumeStatus,
1555 .deliver = yfs_deliver_fs_get_volume_status,
1556 .destructor = afs_flat_call_destructor,
1557};
1558
1559/*
1560 * fetch the status of a volume
1561 */
1562int yfs_fs_get_volume_status(struct afs_fs_cursor *fc,
1563 struct afs_volume_status *vs)
1564{
1565 struct afs_vnode *vnode = fc->vnode;
1566 struct afs_call *call;
1567 struct afs_net *net = afs_v2net(vnode);
1568 __be32 *bp;
1569
1570 _enter("");
1571
1572 call = afs_alloc_flat_call(net, &yfs_RXYFSGetVolumeStatus,
1573 sizeof(__be32) * 2 +
1574 sizeof(struct yfs_xdr_u64),
1575 max_t(size_t,
1576 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
1577 sizeof(__be32),
1578 AFSOPAQUEMAX + 1));
1579 if (!call)
1580 return -ENOMEM;
1581
1582 call->key = fc->key;
1583 call->out_volstatus = vs;
1584
1585 /* marshall the parameters */
1586 bp = call->request;
1587 bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
1588 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1589 bp = xdr_encode_u64(bp, vnode->fid.vid);
1590 yfs_check_req(call, bp);
1591
1592 afs_use_fs_server(call, fc->cbi);
1593 trace_afs_make_fs_call(call, &vnode->fid);
1594 afs_set_fc_call(call, fc);
1595 afs_make_call(&fc->ac, call, GFP_NOFS);
1596 return afs_wait_for_call_to_complete(call, &fc->ac);
1597}
1598
1599/*
1600 * YFS.SetLock operation type
1601 */
1602static const struct afs_call_type yfs_RXYFSSetLock = {
1603 .name = "YFS.SetLock",
1604 .op = yfs_FS_SetLock,
1605 .deliver = yfs_deliver_status_and_volsync,
1606 .done = afs_lock_op_done,
1607 .destructor = afs_flat_call_destructor,
1608};
1609
1610/*
1611 * YFS.ExtendLock operation type
1612 */
1613static const struct afs_call_type yfs_RXYFSExtendLock = {
1614 .name = "YFS.ExtendLock",
1615 .op = yfs_FS_ExtendLock,
1616 .deliver = yfs_deliver_status_and_volsync,
1617 .done = afs_lock_op_done,
1618 .destructor = afs_flat_call_destructor,
1619};
1620
1621/*
1622 * YFS.ReleaseLock operation type
1623 */
1624static const struct afs_call_type yfs_RXYFSReleaseLock = {
1625 .name = "YFS.ReleaseLock",
1626 .op = yfs_FS_ReleaseLock,
1627 .deliver = yfs_deliver_status_and_volsync,
1628 .destructor = afs_flat_call_destructor,
1629};
1630
1631/*
1632 * Set a lock on a file
1633 */
1634int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type,
1635 struct afs_status_cb *scb)
1636{
1637 struct afs_vnode *vnode = fc->vnode;
1638 struct afs_call *call;
1639 struct afs_net *net = afs_v2net(vnode);
1640 __be32 *bp;
1641
1642 _enter("");
1643
1644 call = afs_alloc_flat_call(net, &yfs_RXYFSSetLock,
1645 sizeof(__be32) * 2 +
1646 sizeof(struct yfs_xdr_YFSFid) +
1647 sizeof(__be32),
1648 sizeof(struct yfs_xdr_YFSFetchStatus) +
1649 sizeof(struct yfs_xdr_YFSVolSync));
1650 if (!call)
1651 return -ENOMEM;
1652
1653 call->key = fc->key;
1654 call->lvnode = vnode;
1655 call->out_scb = scb;
1656
1657 /* marshall the parameters */
1658 bp = call->request;
1659 bp = xdr_encode_u32(bp, YFSSETLOCK);
1660 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1661 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1662 bp = xdr_encode_u32(bp, type);
1663 yfs_check_req(call, bp);
1664
1665 afs_use_fs_server(call, fc->cbi);
1666 trace_afs_make_fs_calli(call, &vnode->fid, type);
1667 afs_set_fc_call(call, fc);
1668 afs_make_call(&fc->ac, call, GFP_NOFS);
1669 return afs_wait_for_call_to_complete(call, &fc->ac);
1670}
1671
1672/*
1673 * extend a lock on a file
1674 */
1675int yfs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1676{
1677 struct afs_vnode *vnode = fc->vnode;
1678 struct afs_call *call;
1679 struct afs_net *net = afs_v2net(vnode);
1680 __be32 *bp;
1681
1682 _enter("");
1683
1684 call = afs_alloc_flat_call(net, &yfs_RXYFSExtendLock,
1685 sizeof(__be32) * 2 +
1686 sizeof(struct yfs_xdr_YFSFid),
1687 sizeof(struct yfs_xdr_YFSFetchStatus) +
1688 sizeof(struct yfs_xdr_YFSVolSync));
1689 if (!call)
1690 return -ENOMEM;
1691
1692 call->key = fc->key;
1693 call->lvnode = vnode;
1694 call->out_scb = scb;
1695
1696 /* marshall the parameters */
1697 bp = call->request;
1698 bp = xdr_encode_u32(bp, YFSEXTENDLOCK);
1699 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1700 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1701 yfs_check_req(call, bp);
1702
1703 afs_use_fs_server(call, fc->cbi);
1704 trace_afs_make_fs_call(call, &vnode->fid);
1705 afs_set_fc_call(call, fc);
1706 afs_make_call(&fc->ac, call, GFP_NOFS);
1707 return afs_wait_for_call_to_complete(call, &fc->ac);
1708}
1709
1710/*
1711 * release a lock on a file
1712 */
1713int yfs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
1714{
1715 struct afs_vnode *vnode = fc->vnode;
1716 struct afs_call *call;
1717 struct afs_net *net = afs_v2net(vnode);
1718 __be32 *bp;
1719
1720 _enter("");
1721
1722 call = afs_alloc_flat_call(net, &yfs_RXYFSReleaseLock,
1723 sizeof(__be32) * 2 +
1724 sizeof(struct yfs_xdr_YFSFid),
1725 sizeof(struct yfs_xdr_YFSFetchStatus) +
1726 sizeof(struct yfs_xdr_YFSVolSync));
1727 if (!call)
1728 return -ENOMEM;
1729
1730 call->key = fc->key;
1731 call->lvnode = vnode;
1732 call->out_scb = scb;
1733
1734 /* marshall the parameters */
1735 bp = call->request;
1736 bp = xdr_encode_u32(bp, YFSRELEASELOCK);
1737 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1738 bp = xdr_encode_YFSFid(bp, &vnode->fid);
1739 yfs_check_req(call, bp);
1740
1741 afs_use_fs_server(call, fc->cbi);
1742 trace_afs_make_fs_call(call, &vnode->fid);
1743 afs_set_fc_call(call, fc);
1744 afs_make_call(&fc->ac, call, GFP_NOFS);
1745 return afs_wait_for_call_to_complete(call, &fc->ac);
1746}
1747
1748/*
1749 * YFS.FetchStatus operation type
1750 */
1751static const struct afs_call_type yfs_RXYFSFetchStatus = {
1752 .name = "YFS.FetchStatus",
1753 .op = yfs_FS_FetchStatus,
1754 .deliver = yfs_deliver_fs_status_cb_and_volsync,
1755 .destructor = afs_flat_call_destructor,
1756};
1757
1758/*
1759 * Fetch the status information for a fid without needing a vnode handle.
1760 */
1761int yfs_fs_fetch_status(struct afs_fs_cursor *fc,
1762 struct afs_net *net,
1763 struct afs_fid *fid,
1764 struct afs_status_cb *scb,
1765 struct afs_volsync *volsync)
1766{
1767 struct afs_call *call;
1768 __be32 *bp;
1769
1770 _enter(",%x,{%llx:%llu},,",
1771 key_serial(fc->key), fid->vid, fid->vnode);
1772
1773 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus,
1774 sizeof(__be32) * 2 +
1775 sizeof(struct yfs_xdr_YFSFid),
1776 sizeof(struct yfs_xdr_YFSFetchStatus) +
1777 sizeof(struct yfs_xdr_YFSCallBack) +
1778 sizeof(struct yfs_xdr_YFSVolSync));
1779 if (!call) {
1780 fc->ac.error = -ENOMEM;
1781 return -ENOMEM;
1782 }
1783
1784 call->key = fc->key;
1785 call->out_scb = scb;
1786 call->out_volsync = volsync;
1787
1788 /* marshall the parameters */
1789 bp = call->request;
1790 bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
1791 bp = xdr_encode_u32(bp, 0); /* RPC flags */
1792 bp = xdr_encode_YFSFid(bp, fid);
1793 yfs_check_req(call, bp);
1794
1795 afs_use_fs_server(call, fc->cbi);
1796 trace_afs_make_fs_call(call, fid);
1797 afs_set_fc_call(call, fc);
1798 afs_make_call(&fc->ac, call, GFP_NOFS);
1799 return afs_wait_for_call_to_complete(call, &fc->ac);
1800}
1801
1802/*
1803 * Deliver reply data to an YFS.InlineBulkStatus call
1804 */
1805static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
1806{
1807 struct afs_status_cb *scb;
1808 const __be32 *bp;
1809 u32 tmp;
1810 int ret;
1811
1812 _enter("{%u}", call->unmarshall);
1813
1814 switch (call->unmarshall) {
1815 case 0:
1816 afs_extract_to_tmp(call);
1817 call->unmarshall++;
1818 /* Fall through */
1819
1820 /* Extract the file status count and array in two steps */
1821 case 1:
1822 _debug("extract status count");
1823 ret = afs_extract_data(call, true);
1824 if (ret < 0)
1825 return ret;
1826
1827 tmp = ntohl(call->tmp);
1828 _debug("status count: %u/%u", tmp, call->count2);
1829 if (tmp != call->count2)
1830 return afs_protocol_error(call, -EBADMSG,
1831 afs_eproto_ibulkst_count);
1832
1833 call->count = 0;
1834 call->unmarshall++;
1835 more_counts:
1836 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
1837 /* Fall through */
1838
1839 case 2:
1840 _debug("extract status array %u", call->count);
1841 ret = afs_extract_data(call, true);
1842 if (ret < 0)
1843 return ret;
1844
1845 bp = call->buffer;
1846 scb = &call->out_scb[call->count];
1847 ret = xdr_decode_YFSFetchStatus(&bp, call, scb);
1848 if (ret < 0)
1849 return ret;
1850
1851 call->count++;
1852 if (call->count < call->count2)
1853 goto more_counts;
1854
1855 call->count = 0;
1856 call->unmarshall++;
1857 afs_extract_to_tmp(call);
1858 /* Fall through */
1859
1860 /* Extract the callback count and array in two steps */
1861 case 3:
1862 _debug("extract CB count");
1863 ret = afs_extract_data(call, true);
1864 if (ret < 0)
1865 return ret;
1866
1867 tmp = ntohl(call->tmp);
1868 _debug("CB count: %u", tmp);
1869 if (tmp != call->count2)
1870 return afs_protocol_error(call, -EBADMSG,
1871 afs_eproto_ibulkst_cb_count);
1872 call->count = 0;
1873 call->unmarshall++;
1874 more_cbs:
1875 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
1876 /* Fall through */
1877
1878 case 4:
1879 _debug("extract CB array");
1880 ret = afs_extract_data(call, true);
1881 if (ret < 0)
1882 return ret;
1883
1884 _debug("unmarshall CB array");
1885 bp = call->buffer;
1886 scb = &call->out_scb[call->count];
1887 xdr_decode_YFSCallBack(&bp, call, scb);
1888 call->count++;
1889 if (call->count < call->count2)
1890 goto more_cbs;
1891
1892 afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
1893 call->unmarshall++;
1894 /* Fall through */
1895
1896 case 5:
1897 ret = afs_extract_data(call, false);
1898 if (ret < 0)
1899 return ret;
1900
1901 bp = call->buffer;
1902 xdr_decode_YFSVolSync(&bp, call->out_volsync);
1903
1904 call->unmarshall++;
1905 /* Fall through */
1906
1907 case 6:
1908 break;
1909 }
1910
1911 _leave(" = 0 [done]");
1912 return 0;
1913}
1914
1915/*
1916 * FS.InlineBulkStatus operation type
1917 */
1918static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
1919 .name = "YFS.InlineBulkStatus",
1920 .op = yfs_FS_InlineBulkStatus,
1921 .deliver = yfs_deliver_fs_inline_bulk_status,
1922 .destructor = afs_flat_call_destructor,
1923};
1924
1925/*
1926 * Fetch the status information for up to 1024 files
1927 */
1928int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
1929 struct afs_net *net,
1930 struct afs_fid *fids,
1931 struct afs_status_cb *statuses,
1932 unsigned int nr_fids,
1933 struct afs_volsync *volsync)
1934{
1935 struct afs_call *call;
1936 __be32 *bp;
1937 int i;
1938
1939 _enter(",%x,{%llx:%llu},%u",
1940 key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
1941
1942 call = afs_alloc_flat_call(net, &yfs_RXYFSInlineBulkStatus,
1943 sizeof(__be32) +
1944 sizeof(__be32) +
1945 sizeof(__be32) +
1946 sizeof(struct yfs_xdr_YFSFid) * nr_fids,
1947 sizeof(struct yfs_xdr_YFSFetchStatus));
1948 if (!call) {
1949 fc->ac.error = -ENOMEM;
1950 return -ENOMEM;
1951 }
1952
1953 call->key = fc->key;
1954 call->out_scb = statuses;
1955 call->out_volsync = volsync;
1956 call->count2 = nr_fids;
1957
1958 /* marshall the parameters */
1959 bp = call->request;
1960 bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
1961 bp = xdr_encode_u32(bp, 0); /* RPCFlags */
1962 bp = xdr_encode_u32(bp, nr_fids);
1963 for (i = 0; i < nr_fids; i++)
1964 bp = xdr_encode_YFSFid(bp, &fids[i]);
1965 yfs_check_req(call, bp);
1966
1967 afs_use_fs_server(call, fc->cbi);
1968 trace_afs_make_fs_call(call, &fids[0]);
1969 afs_set_fc_call(call, fc);
1970 afs_make_call(&fc->ac, call, GFP_NOFS);
1971 return afs_wait_for_call_to_complete(call, &fc->ac);
1972}
1973
1974/*
1975 * Deliver reply data to an YFS.FetchOpaqueACL.
1976 */
1977static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
1978{
1979 struct yfs_acl *yacl = call->out_yacl;
1980 struct afs_acl *acl;
1981 const __be32 *bp;
1982 unsigned int size;
1983 int ret;
1984
1985 _enter("{%u}", call->unmarshall);
1986
1987 switch (call->unmarshall) {
1988 case 0:
1989 afs_extract_to_tmp(call);
1990 call->unmarshall++;
1991 /* Fall through */
1992
1993 /* Extract the file ACL length */
1994 case 1:
1995 ret = afs_extract_data(call, true);
1996 if (ret < 0)
1997 return ret;
1998
1999 size = call->count2 = ntohl(call->tmp);
2000 size = round_up(size, 4);
2001
2002 if (yacl->flags & YFS_ACL_WANT_ACL) {
2003 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2004 if (!acl)
2005 return -ENOMEM;
2006 yacl->acl = acl;
2007 acl->size = call->count2;
2008 afs_extract_begin(call, acl->data, size);
2009 } else {
2010 afs_extract_discard(call, size);
2011 }
2012 call->unmarshall++;
2013 /* Fall through */
2014
2015 /* Extract the file ACL */
2016 case 2:
2017 ret = afs_extract_data(call, true);
2018 if (ret < 0)
2019 return ret;
2020
2021 afs_extract_to_tmp(call);
2022 call->unmarshall++;
2023 /* Fall through */
2024
2025 /* Extract the volume ACL length */
2026 case 3:
2027 ret = afs_extract_data(call, true);
2028 if (ret < 0)
2029 return ret;
2030
2031 size = call->count2 = ntohl(call->tmp);
2032 size = round_up(size, 4);
2033
2034 if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
2035 acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
2036 if (!acl)
2037 return -ENOMEM;
2038 yacl->vol_acl = acl;
2039 acl->size = call->count2;
2040 afs_extract_begin(call, acl->data, size);
2041 } else {
2042 afs_extract_discard(call, size);
2043 }
2044 call->unmarshall++;
2045 /* Fall through */
2046
2047 /* Extract the volume ACL */
2048 case 4:
2049 ret = afs_extract_data(call, true);
2050 if (ret < 0)
2051 return ret;
2052
2053 afs_extract_to_buf(call,
2054 sizeof(__be32) * 2 +
2055 sizeof(struct yfs_xdr_YFSFetchStatus) +
2056 sizeof(struct yfs_xdr_YFSVolSync));
2057 call->unmarshall++;
2058 /* Fall through */
2059
2060 /* extract the metadata */
2061 case 5:
2062 ret = afs_extract_data(call, false);
2063 if (ret < 0)
2064 return ret;
2065
2066 bp = call->buffer;
2067 yacl->inherit_flag = ntohl(*bp++);
2068 yacl->num_cleaned = ntohl(*bp++);
2069 ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
2070 if (ret < 0)
2071 return ret;
2072 xdr_decode_YFSVolSync(&bp, call->out_volsync);
2073
2074 call->unmarshall++;
2075 /* Fall through */
2076
2077 case 6:
2078 break;
2079 }
2080
2081 _leave(" = 0 [done]");
2082 return 0;
2083}
2084
2085void yfs_free_opaque_acl(struct yfs_acl *yacl)
2086{
2087 if (yacl) {
2088 kfree(yacl->acl);
2089 kfree(yacl->vol_acl);
2090 kfree(yacl);
2091 }
2092}
2093
2094/*
2095 * YFS.FetchOpaqueACL operation type
2096 */
2097static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
2098 .name = "YFS.FetchOpaqueACL",
2099 .op = yfs_FS_FetchOpaqueACL,
2100 .deliver = yfs_deliver_fs_fetch_opaque_acl,
2101 .destructor = afs_flat_call_destructor,
2102};
2103
2104/*
2105 * Fetch the YFS advanced ACLs for a file.
2106 */
2107struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *fc,
2108 struct yfs_acl *yacl,
2109 struct afs_status_cb *scb)
2110{
2111 struct afs_vnode *vnode = fc->vnode;
2112 struct afs_call *call;
2113 struct afs_net *net = afs_v2net(vnode);
2114 __be32 *bp;
2115
2116 _enter(",%x,{%llx:%llu},,",
2117 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2118
2119 call = afs_alloc_flat_call(net, &yfs_RXYFSFetchOpaqueACL,
2120 sizeof(__be32) * 2 +
2121 sizeof(struct yfs_xdr_YFSFid),
2122 sizeof(__be32) * 2 +
2123 sizeof(struct yfs_xdr_YFSFetchStatus) +
2124 sizeof(struct yfs_xdr_YFSVolSync));
2125 if (!call) {
2126 fc->ac.error = -ENOMEM;
2127 return ERR_PTR(-ENOMEM);
2128 }
2129
2130 call->key = fc->key;
2131 call->out_yacl = yacl;
2132 call->out_scb = scb;
2133 call->out_volsync = NULL;
2134
2135 /* marshall the parameters */
2136 bp = call->request;
2137 bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
2138 bp = xdr_encode_u32(bp, 0); /* RPC flags */
2139 bp = xdr_encode_YFSFid(bp, &vnode->fid);
2140 yfs_check_req(call, bp);
2141
2142 afs_use_fs_server(call, fc->cbi);
2143 trace_afs_make_fs_call(call, &vnode->fid);
2144 afs_make_call(&fc->ac, call, GFP_KERNEL);
2145 return (struct yfs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
2146}
2147
2148/*
2149 * YFS.StoreOpaqueACL2 operation type
2150 */
2151static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
2152 .name = "YFS.StoreOpaqueACL2",
2153 .op = yfs_FS_StoreOpaqueACL2,
2154 .deliver = yfs_deliver_status_and_volsync,
2155 .destructor = afs_flat_call_destructor,
2156};
2157
2158/*
2159 * Fetch the YFS ACL for a file.
2160 */
2161int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *fc, const struct afs_acl *acl,
2162 struct afs_status_cb *scb)
2163{
2164 struct afs_vnode *vnode = fc->vnode;
2165 struct afs_call *call;
2166 struct afs_net *net = afs_v2net(vnode);
2167 size_t size;
2168 __be32 *bp;
2169
2170 _enter(",%x,{%llx:%llu},,",
2171 key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
2172
2173 size = round_up(acl->size, 4);
2174 call = afs_alloc_flat_call(net, &yfs_RXYFSStoreOpaqueACL2,
2175 sizeof(__be32) * 2 +
2176 sizeof(struct yfs_xdr_YFSFid) +
2177 sizeof(__be32) + size,
2178 sizeof(struct yfs_xdr_YFSFetchStatus) +
2179 sizeof(struct yfs_xdr_YFSVolSync));
2180 if (!call) {
2181 fc->ac.error = -ENOMEM;
2182 return -ENOMEM;
2183 }
2184
2185 call->key = fc->key;
2186 call->out_scb = scb;
2187 call->out_volsync = NULL;
2188
2189 /* marshall the parameters */
2190 bp = call->request;
2191 bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
2192 bp = xdr_encode_u32(bp, 0); /* RPC flags */
2193 bp = xdr_encode_YFSFid(bp, &vnode->fid);
2194 bp = xdr_encode_u32(bp, acl->size);
2195 memcpy(bp, acl->data, acl->size);
2196 if (acl->size != size)
2197 memset((void *)bp + acl->size, 0, size - acl->size);
2198 yfs_check_req(call, bp);
2199
2200 trace_afs_make_fs_call(call, &vnode->fid);
2201 afs_make_call(&fc->ac, call, GFP_KERNEL);
2202 return afs_wait_for_call_to_complete(call, &fc->ac);
2203}